Abstract

The present invention comprises: an insulation capacitor that is opened and closed by the neutral-point switch of a transformer for a ground-type gauge; a DC power supply that charges the insulation capacitor; a DC power supply switch that opens and closes the connection between the DC power supply and the insulation capacitor; an open/close control unit that controls the open/close state of each of the neutral-point switch and the DC power supply switch; and a voltage measurement unit that measures the voltage signal of the insulation capacitor.

IPC Classes  ?

• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• G01R 27/02 - Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection

Abstract

A dynamo-electric machine comprising: a stator core with plurality of slots, a coil covered with insulated conductor wire, wherein the coil comprising plurality of storages stored in the slots and plurality of coil ends that are outside of the slots, conductor of coil end close to the conductor of the heterophase coil having insulating materials at only one of the surfaces, either the inner diameter surface close to the conductor of the heterophase coil or outer diameter surface of the heterophase coil.

IPC Classes  ?

• H02K 3/40 - Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges

Abstract

The present invention provides an inkjet recording device and an inkjet recording method that are capable of not only quickly detecting at least leakage of ink to the outside but also detecting whether ink control mechanism parts related to ink circulation are operating normally.　A control unit 20 executes a printing mode for executing printing on a printing target and a standby mode for avoiding printing on the printing target. The standby mode includes an ink circulation processing sequence for driving ink control mechanism parts 117, 207 to supply ink from an ink container 201 to an ink path for recollection, and a standby processing sequence for avoiding driving the ink control mechanism parts. The control unit is characterized by: determining that there is an abnormal state, where the ink control mechanism parts are not operating normally, if no increase is detected in the liquid level by a liquid level sensor 204 in the ink circulation processing sequence; determining that there is an abnormal state, where ink leakage has occurred in the ink path, if a decrease is detected in the liquid level by the liquid level sensor in the standby processing sequence; and issuing an alarm to a notification means 105 if the control unit determines that there is an abnormal state.

IPC Classes  ?

• B41J 2/175 - Ink supply systems
• B41J 2/18 - Ink recirculation systems

Abstract

This compressed air energy storage device comprises: a compressor that is driven by an electric motor and compresses air; a first heat exchanger that heats a heat storage medium through heat exchange with compressed air compressed by the compressor; a pressure accumulating tank that stores compressed air that has been heat-exchanged by the first heat exchanger; an expander that is driven by the compressed air stored in the pressure accumulating tank; a power generator driven by the expander; a second heat exchanger that heats compressed air, which flows into the expander, through heat exchange with the heat storage medium that has been heated by the first heat exchanger; and a heat pump device for absorbing heat from the heat storage medium that has been heat-exchanged by the second heat exchanger and dissipating heat to the compressed air that drives the expander.

IPC Classes  ?

• F02C 6/16 - Gas-turbine plants having means for storing energy, e.g. for meeting peak loads for storing compressed air
• F25B 7/00 - Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit

Abstract

Provided is a hoist that includes a motor and controls the motor to lift and lower a suspended load. The hoist comprises: an operation information acquisition unit which acquires operation information pertaining to the motor; and a status inference unit which infers the status of the hoist on the basis of operation information that has been acquired by the operation information acquisition unit and a status inference formula that has been trained so as to be able to infer the status of the hoist, wherein the status inference formula is constituted by a common inference part which is independent of the model of hoist and model-specific inference parts which differ from one model of hoist to another.

IPC Classes  ?

• B66D 1/46 - Control devices non-automatic electric
• B66C 13/16 - Applications of indicating, registering, or weighing devices
• B66C 13/22 - Control systems or devices for electric drives
• B66C 13/46 - Position indicators for suspended loads or for crane elements

Abstract

A communication device comprising, a local communication unit communicating with an apparatus, a memory unit storing firmware for the apparatus, if the history of activation and deactivation as an external storage terminal by the apparatus is determined to be a predefined sequence, communication device that is not activated as an external storage terminal or that operates in such a way that the firmware is not visible from the apparatus.

IPC Classes  ?

• G06F 8/65 - Updates

Abstract

This control system comprises: a control unit which has a Web server and two or more network ports; and a calculation unit which has a Web server and a network port, wherein the two or more network ports of the control unit include first and second network ports, the first network port of the control unit and the network port of the calculation unit are connected to a first network segment, which is a closed network segment to which elements other than the control unit and the calculation unit are not connected, and the control unit transmits data, which is received from the interface unit, to the calculation unit and displays a Web server screen of the calculation unit on a Web server screen of the control unit.

IPC Classes  ?

• H04L 12/28 - Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
• G05B 19/05 - Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

Abstract

This diagnostic device compares the frequency characteristics of a current transformer at the start of the operation and the frequency characteristics of the current transformer after the start of the operation, and, when an amount of change thereof has exceeded a prescribed threshold value, detects deterioration of ground insulation of a device.

IPC Classes  ?

• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• G01R 27/18 - Measuring resistance to earth
• G01R 31/00 - Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
• G01R 31/56 - Testing of electric apparatus

Abstract

With respect to an inkjet recording device in which a pigment-based ink is used, provided is an ink device that can suppress ink adherence in an ink path and precipitation of pigment components in an ink container, which occur when printing is not implemented for a long period of time, and can jet the pigment-based ink in a short period of time when printing is resumed. In this inkjet recording device in which a pigment-based ink is used, a control unit 7 executes a printing mode in which a printing operation is implemented, and a suspension mode in which a printing operation is not implemented. In the suspension mode, the control unit 7 forcibly causes stirring of a pigment-based ink 68A in an ink container 31, and ink circulation (S300) in an ink circulation path that does not include a printing head, or ink circulation (S400) in an ink circulation path that includes the printing head. Thereby, ink adherence in the ink circulation path and precipitation of pigment components in the ink container, which occur when printing is not implemented for a long period of time, can be suppressed, and the pigment-based ink can be jetted in a short period of time when printing is resumed.

IPC Classes  ?

• B41J 2/18 - Ink recirculation systems
• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/08 - Ink jet characterised by jet control for many-valued deflection charge-control type

Abstract

A power conversion device comprising, a power converter that outputs signal to the motor to vary the motor's output frequency, output voltage and output current and control unit that controls the power converter, the control unit is, calculating the first power from the output voltage and output current, calculating the second power from the output current, electrical circuit parameters and frequency estimates, calculating the first phase error estimate so that the first power follows the second power in the first frequency domain, calculating the second phase error estimate different from the first frequency domain in a second frequency domain, controlling the frequency estimates so that the first phase error estimate or the second phase error estimate follows the command value of the phase error estimate.

IPC Classes  ?

• H02P 21/18 - Estimation of position or speed
• H02P 21/24 - Vector control not involving the use of rotor position or rotor speed sensors
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Abstract

In this power conversion device, the voltage of three‐phase AC input system power supply is transformed by a transformer and is outputted as three‐phase AC to a load power supply system. A control calculation part has a current detection part that outputs a current detected by a current detector as current data, refers to the current data outputted from the current detection part, and, on the basis of a current flowing through each phase of the three‐phase AC on the secondary side of the transformer or a current flowing through each phase of the three‐phase AC flowing to the load power supply system, performs anomaly diagnosis on the power supply system. Further, the control calculation part has a voltage detection part, and, on the basis of a voltage detected by the voltage detection part and on the basis of a voltage in each phase of the three-phase AC on the secondary side of the transformer or a voltage in each phase of the three-phase AC to the load power supply system, performs anomaly diagnosis on the power supply system. Accordingly, in a power conversion device in which the voltage of an input system power supply is transformed by a transformer and is outputted to a load power supply system, current/voltage anomaly in an electric system including the transformer is detected.

IPC Classes  ?

• H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

Provided is a power regeneration converter that is disposed between an inverter which outputs a three-phase alternating current to an electric motor and a three-phase alternating current power source which is an input system, and that supplies induced electric power generated by the electric motor to the three-phase alternating current power source, wherein a control unit calculates a three-phase alternating current voltage target value for performing PWM on the basis of a three-phase alternating current voltage of the input system detected by an alternating current voltage detection unit, a three-phase alternating current detected by an alternating current detection unit, and a direct current voltage between the inverter and the power regeneration converter detected by a direct current voltage detection unit, and controls the direct current voltage between the inverter and the power regeneration converter on the basis of the calculated three-phase alternating current voltage target value. Thus, in a power conversion device, it is possible to maintain an output direct current voltage at a suitable value, and to reduce an increase in overmodulation and noise, an increase in switching loss, heat generation in a filter including a reactor, and an increase in insulation degradation of a load device.

IPC Classes  ?

• H02M 7/12 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

This data transfer system is provided with first and second transfer units which perform data transfer via a network between first and second memory regions at a predetermined transfer cycle. A control device for a device to be controlled reads a factor data set from the second memory region for control at each predetermined control cycle, and writes, into the second memory region, a control data set based on the factor data set. During factor transfer at each predetermined transfer cycle, the first and second transfer units transfer the factor data set from the first memory region to the second memory region. During control transfer at each predetermined transfer cycle, the control data set is transferred from the second memory region to the first memory region. In the network, the delay time differs depending on the transfer cycle. The predetermined transfer cycle is a cycle shorter than the predetermined control cycle, and is one transfer cycle that falls within an allowable delay time.

IPC Classes  ?

• G06F 13/38 - Information transfer, e.g. on bus
• G05B 19/05 - Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

Abstract

A compressor includes: a housing; a compressor body to compress gas; a motor to drive the compressor body; a control board to control the motor; and a tank to store the gas outputted from the compressor body, wherein the housing has: a machine chamber storing the compressor body and the motor; a B-chamber having piping to connect the compressor body with the tank; an A-chamber storing the tank; an A-partition separating the machine chamber from the A-chamber and B-chamber; and a B-partition between the A-chamber and the B-chamber, the A-chamber has an air intake port to introduce ambient air, the A-partition has an A-vent as a hole to communicate between the machine chamber and the A-chamber, and a suction port of the compressor body is located in vicinity to the A-vent.

IPC Classes  ?

• F04C 29/04 - Heating; Cooling; Heat insulation
• F04B 41/02 - Pumping installations or systems specially adapted for elastic fluids having reservoirs
• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

A rotary electric machine (1000) including: a rotor (200); a stator (100) surrounding a periphery of the rotor (200); a first recessed portion (133) disposed in an inner circumferential surface of a back yoke (130) of the stator (100), and extending in an axial direction of the stator (100); and a tooth (120) having one end fitted in the first recessed portion (133), a clearance formed between the first recessed portion (133) and the one end of the tooth (120) fitted in the first recessed portion (133) being smaller in a circumferential direction of the stator (100) than in a radial direction of the stator (100).

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 15/12 - Impregnating, heating or drying of windings, stators, rotors or machines

Abstract

This packaged gas compressor comprises a compressor main body, a cooling fan, an air-cooled heat exchanger, and a housing that houses the compressor main body, the cooling fan, and the air-cooled heat exchanger. The housing includes a suction port for cooling air on a side surface surrounding constituent equipment. The compressor main body is disposed in a lower portion in the housing. The cooling fan is disposed above the compressor main body with a rotational axis of the cooling fan being orthogonal to a height direction of the housing. The heat exchanger is disposed at the position of a suction side of the cooling fan. The suction port is provided overlapping the compressor main body in a height direction of the housing and provided, for the heat exchanger and the cooling fan, closer to the cooling fan than to the heat exchanger. The compressor main body is disposed, in an extension direction of the rotational axis of the cooling fan, overlapping an area between the heat exchanger and an opposing surface of the side surfaces of the housing that opposes a cooling air inflow side of the heat exchanger.

IPC Classes  ?

• F04B 39/06 - Cooling; Heating; Prevention of freezing
• F04B 41/00 - Pumping installations or systems specially adapted for elastic fluids
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

Provided is an electric chain block that can correspond to an installation environment in which a short closeness dimension is required from one chain bucket and to an action environment in which the chain bucket and a load interfere with one another.　In the present invention, a chain bucket comprising a fixed part that is attached and fixed to a chain block body and a storage part that stores a load chain is attached to the chain block body in a first attachment state in which a closeness dimension is short in lieu of the vertical-direction height of the bottom surface of the chain bucket from a floor surface being low. Additionally, in a state in which the chain bucket is rotated 180° from the first attachment state about the fixed part, the chain bucket is attached in a second attachment state in which the vertical-direction height of the bottom surface of the chain bucket from the floor surface is high in lieu of the closeness dimension being long.

IPC Classes  ?

• B66D 3/26 - Other details, e.g. housings

Abstract

A power converter apparatus comprising: a power converter that outputs signal to the magnet motor to vary the output frequency, output voltage and output current of the magnet motor, a control unit controls the power converter, wherein the control unit calculating the gain of the magnetic flux component of the q-axis, which varies with the phase of the magnet motor, calculating the d-axis induced voltage command value based on a value of the induced voltage coefficient, frequency estimates or frequency command value, and the gain of the flux component of the q-axis.

IPC Classes  ?

• H02P 21/26 - Rotor flux based control
• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/22 - Current control, e.g. using a current control loop

Abstract

Provided is an air compression device comprising a buffer tank that is provided at a prescribed position of an air return pipe and temporarily stores return air.

IPC Classes  ?

• F04B 49/06 - Control using electricity

Abstract

Provided is a compressor (10) in which a piston (33) supported by a connecting rod (32) reciprocates while swinging inside a cylinder (22), wherein the piston (33) comprises: a resin (36) constituting at least a surface (33a) contacting an inner peripheral wall (22a) of the cylinder (22) and a surface (33c) on a compression chamber (22b) side; an insert component (41) embedded in the resin (36); and a penetration hole (41d) provided in the insert component (41) and having the resin (36) filled therein.

IPC Classes  ?

• F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups

Abstract

This monitoring equipment monitors a plurality of devices with maintenance contracts, and is provided with: an input unit that receives target identification data, which is data for identifying a target device that is a device to be processed; an acquisition unit that acquires operating data of the target device; a proposal content determination unit that calculates a new maintenance contract type, which is a type of new maintenance contract suitable for the target device, on the basis of a current maintenance contract type, which is the type of the current maintenance contract for the target device, and the operating data of the target device; and an output unit that outputs the new maintenance contract type calculated by the proposal content determination unit.

IPC Classes  ?

• G06Q 10/20 - Administration of product repair or maintenance
• G06Q 30/012 - Providing warranty services

Abstract

In order to improve the accuracy of detection of early signs of cooling performance degradation, this early sign detection system comprises: a pre-processing unit for acquiring chronological operational data of a device to be cooled that has a temperature elevation source and a cooling unit for cooling the temperature elevation source, and extracting a feature quantity from the operational data; and an early sign detection unit for diagnosing cooling performance on the basis of an output obtained by inputting a feature quantity extracted from diagnostic operational data to an early sign detection model constructed using training data generated on the basis of a feature quantity extracted from training operational data, and on the basis of labels indicating a state of cooling performance by the cooling unit. The early sign detection model has been constructed with the use of training data generated on the basis of a feature quantity extracted from operational data including operational states falling under ongoing operation and ongoing standby. When diagnosing cooling performance, the early sign detection unit inputs, to the early sign detection model, a feature quantity extracted from the operational data including operating states relevant only to ongoing operations.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring

Abstract

A method of updating the program of a gas compressor system that supplies at least one of pressure and flow rate of gas discharged from the discharge piping system based on predetermined values comprising: the management device obtaining an update program, updating a program for an in-service compressor of the plurality of gas compressors whose program is to be updated, and driving other gas compressors of the plurality of gas compressors, which are different from the operating compressor whose program is to be updated, in accordance with the predetermined value.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04C 28/02 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
• G06F 8/65 - Updates

Abstract

A electric motor control device comprising a converter section converting AC voltage to DC voltage, an inverter section converting DC voltage from the converter section to AC voltage and supplying said AC voltage to electric motor, an inverter control unit controlling said inverter section, a current detection unit detecting the current flowing in said electric motors and a power calculation unit estimating the temperature of said electric motors from said detected current, calculating the resistance of said electric motors from said estimated temperature, and calculating the copper loss from said calculated resistance.

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 25/022 - Synchronous motors
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Abstract

Motor controller device comprising a position control system that controls the position of a machine end connected to a motor, wherein the motor controller device receiving the first speed directive from the high-level controller, stored in the position control system to output a motor axis position response to the high-level controller, comprising speed controller and vibration controller in speed control system, wherein the vibration controller in speed control system comprising: a position command estimator that calculates an estimate of the location directive based on the first speed directive and the motor axis position response, a parallel vibration damping controller that extracts the frequency components that excite vibration of the machine end included in the first speed directive based on the estimated value of the location directive, and outputs the extracted frequency components. The parallel vibration damping controller outputs the extracted frequency components, a phase regulator to improve the response delay caused by the parallel vibration damping controller, a first unit converter that converts the output of the phase regulator into the dimension of velocity, and an arithmetic unit wherein the arithmetic unit, the output of the parallel vibration damping controller is subtracted from the first speed directive to remove from the first speed directive the frequency components that excite vibration at the machine end, and output as a second speed directive, the first real speed directive as an output of the vibration controller in speed control system based on the output of the first unit converter and the second speed directive, uses the first real speed directive as a command for the speed controller.

IPC Classes  ?

• H02P 23/04 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• H02P 23/18 - Controlling the angular speed together with angular position or phase

Abstract

A screw compressor for compressing a working medium sucked through a suction opening and discharging the compressed working medium through a delivery opening, wherein the screw compressor includes: a male rotor and a female rotor that rotate while meshing with each other; a casing that houses the male rotor and the female rotor and is provided with a bore which forms a working chamber designed, together with the male rotor and the female rotor, to compress the working medium; a drive unit that rotationally drives at least one of the male rotor and the female rotor; a working chamber closing unit that forms a suction port for sucking the working medium into the working chamber and closes the working chamber when the working chamber reaches a specified capacity; and a suction space that connects the suction opening and the suction port to allow communication therebetween, wherein an open space that connects the suction opening and the suction port to allow communication therebetween is provided between a shaft of the male rotor and a shaft of the female rotor on an opposite side of the male rotor and the female rotor relative to the suction port.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

In this liquid-supply-type screw compressor, a driving mechanism slidably drives a valve body by means of: a first biasing force due to an elastic force of an elastic body in a direction from a first valve body position to a third valve body position; and a second biasing force due to the discharge pressure of a discharge gas in a direction from the third valve body position to the first valve body position. The driving mechanism: slidably drives the valve body to the third valve body position when a discharge pressure is no greater than a first discharge pressure where a cooling liquid pressure is a first pressure, and is greater than a second discharge pressure where the cooling liquid pressure is a second pressure; slidably drives the valve body to a second valve body position when the discharge pressure is greater than the first discharge pressure and smaller than a predetermined pressure greater than the first discharge pressure; and slidably drives the valve body to the first valve body position when the discharge pressure is at least the predetermined pressure.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/02 - Lubrication; Lubricant separation 
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

Rotating electrical machine comprising: a housing storing a stator and a rotor, a fan cover covers the housing from the outside, an end bracket attached to the axial end face of the housing, a cooling fan installed in the fan cover, wherein output shaft side end face of the fan cover has a convex portion extending in the axial direction, the end bracket on the output shaft side has a concave first exhaust opening part relative to the convex part of the fan cover, the end bracket on the anti-output shaft side has a second exhaust opening part on the opposite side of the first exhaust opening part.

IPC Classes  ?

• H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines

Abstract

A motor control device that supplies electric power to a motor is disclosed. The motor control device is provided with a storage unit to store position offset data and information of a machine origin position of the motor. The motor control device generates a command value of a position after offset by using an externally input position command and the position offset data and coverts electric power to be supplied to the motor based on the command value of a position after offset and position information that is input from an encoder. The position offset data is data in which offset positions and offset quantities have been recorded in a mapping relation. A start position of the offset positions differs from the machine origin position.

IPC Classes  ?

• G05B 19/404 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia

Abstract

A casing of a screw compressor has a delivery inner wall face facing delivery end faces of a male rotor and a female rotor. The delivery inner wall face of the casing has a shield area that shields at least a part of a track of an axial fluid communication path, which is a clearance that periodically occurs at the delivery end faces according to variation of intermeshing of the male and female rotors upon rotation thereof and is bounded by trailing flanks of the male and female rotors. The shield area of the casing is provided with a groove group made up of a plurality of grooves having longitudinal directions. The grooves of the groove group are juxtaposed in the circumferential direction of at least one rotor of the male and female rotors and are arranged such that their sides extending in the longitudinal directions are disposed adjacent to each other. Each groove of the groove group is configured such that its longitudinal direction oriented from the inner circumferential side of the one rotor toward the outer circumferential side is inclined with respect to the radial direction of the one rotor in the same direction as the rotational direction of the one rotor.

IPC Classes  ?

• F04C 2/16 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

Provided is a dehumidifying device that can effectively utilize compressed air used for reproduction of adsorbent.　The dehumidifying device comprises: adsorbent containers 2A, 2B in which adsorbent is contained; switching valves 3A to 3E connected to the adsorbent containers 2A, 2B; a control device 4 that switches the process of each adsorbent container between an absorbing process and a reproduction process by controlling the switching valves 3A to 3E; and an air release path 9 that releases the compressed air flowing out of the adsorbent container in the reproduction process. The air release path 9 has a heat collector 16 that heats a fluid with the heat of the compressed air flowing out of the adsorbent container in the reproduction process.

IPC Classes  ?

• B01D 53/26 - Drying gases or vapours

Abstract

Provided is a technique for a motor control device, said technique achieving the adjustment of control parameters even between a higher-level system and a lower-level system. A controller 10 of a higher-level system1 inputs a higher-level control deviation A2 based on the calculations of a higher-level control command A1 and a higher-level control response A4 to a first controller 51 and outputs a servo control command A3 based on a first control gain. A servo amplifier 20 that is the motor control device has a second controller 52, a power converter 23, and a control gain estimator 27. The motor control device inputs a signal based on the servo control command A3 and the higher-level control response A4 to the second controller 52, inputs a signal output from the second controller 52 to the power converter 23, and supplies a signal output from the power converter 23 to a motor 30. The control gain estimator 27 receives the servo control command A3 and the higher-level control deviation A2 or the higher-level control command A1 and estimates the first control gain.

IPC Classes  ?

• H02P 29/00 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors

Abstract

This screw compressor comprises male and female rotors that are accommodated in a casing so as to be in mesh with each other and be capable of rotating about parallel rotational axes. The male and female rotors each include a rotor teeth portion having spiral teeth, a suction-side shaft portion, and a discharge-side shaft portion. The rotor teeth portions of the male and female rotors are each configured such that a lead angle changes. Each of the male and female rotors has, on either the suction-side shaft portion or the discharge-side shaft portion, an engaging portion that engages with a positioning jig used during assembly in order to restrict the distance between the rotational axes of the male and female rotors.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups

Abstract

This oil-cooled screw compressor is provided with: a compressor body (1) including a pair of screw rotors (11); and a gear room (24) that accommodates a power transmission gear (21) to transmit rotation to the pair of screw rotors (11) and has an oil discharge port (24a) for lubricant on a bottom surface thereof. The oil discharge port (24a) communicates with an oil inflow port (12af) opening into a casing (12) so as to be positioned between suction side end surfaces (11ab) and (11bb) of the pair of screw rotors (11) and a suction side inner wall surface (12ae) opposed to the suction side end surfaces (11ab) and (11bb). The casing (12) has a downslope inclination part (12ah) descending toward a bottom part (12ag) of the casing (12) opposed to a lower end of one of the pair of screw rotors (11). The oil inflow port (12af) is provided at a position higher than the bottom part (12ag) of the casing (12) in the inclination part (12ah).

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/02 - Lubrication; Lubricant separation 

Abstract

Provided is an ink jet recording system that, by using a sequential management computer, can acquire backup data of an ink jet recording device without relying on an external storage medium.　An ink jet recording device 600 and a server 209, and the server 209 and a management computer 15, are connected by a communication network 214. Every occurrence of a first prescribed time, or as requested by the server 209, backup data of the ink jet recording device 600 is transferred to a readable/writable server memory of the server 209, and every occurrence of a second prescribed time, or as requested by the management computer 15, the backup data is transferred from the memory of the server 209 to a readable/writable management memory 321 of the management computer.

IPC Classes  ?

• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism
• B41J 5/48 - Character or syllable selection controlled by recorded information characterised by the kind of storage of recorded information the storage being on external storages

Abstract

An embedded-magnet-type rotary electric motor comprising a stator and a rotor that has a rotor core having a plurality of permanent magnets embedded in the interior thereof, the rotor being retained so as to be capable of rotating a rotation axis on the inside of the stator, wherein: the plurality of permanent magnets are retained so as to be spaced from each other in the circumferential direction in the outer peripheral portion of the rotor core, and have magnetic poles at both ends thereof in the circumferential direction; the rotor core has a plurality of lightening holes that are spaced from each other in the circumferential direction on the rotation axis side of the plurality of permanent magnets; each of the plurality of lightening holes has a bottom wall surface portion that extends in the circumferential direction on the rotation axis side, an outer peripheral wall surface portion on the outer peripheral side, and side wall surface portions that connects the bottom wall surface portion and the outer peripheral wall surface portion; and the outer peripheral wall surface portion has an inclined wall surface portion that approaches the rotation axis over the interval from the central portion toward a magnetic pole side of one permanent magnet among the plurality of permanent magnets.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Abstract

This printer system is provided with a plurality of printers that have printing mechanism unit control software that controls a printing drive unit through a GUI displayed on a display operation unit, and the plurality of printers are connected via a network. One of the plurality of printers is an operating-side printer that operates the other printers. The operating-side printer is provided with a GUI file for the printer itself and control software that issues commands to the printing mechanism unit control software. A GUI file and control software for the operated-side printers are constructed, and the operated-side printers are operated to run on the basis of the constructed GUI file and control software for the operated-side printers.

IPC Classes  ?

• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism
• B41J 29/42 - Scales and indicators, e.g. for determining side margins
• G06F 3/048 - Interaction techniques based on graphical user interfaces [GUI]

Abstract

A novel inkjet recording device that allows occurrence of scattering to be suppressed without limiting the size of a printed character (font size) is provided. The novel inkjet recording device is so configured that a deflection positive electrode, a deflection negative electrode, or both the deflection positive electrode and the deflection negative electrode constituting a print head can be moved along a direction of ejection of ink droplets in correspondence with the size of a printed character.

IPC Classes  ?

• B41J 2/09 - Deflection means
• B41J 2/085 - Charge means, e.g. electrodes
• B41J 2/185 - Ink-collectors; Ink-catchers

Abstract

The purpose of the present invention is to provide an inkjet recording system that can promote reduction of environmental load. To achieve this purpose, the present invention is an inkjet recording system comprising an inkjet recording device and a server, communication being enabled between the inkjet recording device and the server, wherein the server, on the basis of information detected by the inkjet recording device or information inputted using a terminal device that can communicate with the server, calculates points to be imparted when an action that contributes to reducing greenhouse gas emissions is performed on the inkjet recording apparatus.

IPC Classes  ?

• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism
• B41J 2/01 - Ink jet
• B41J 2/06 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
• B41J 2/09 - Deflection means

Abstract

In the present invention, a control system including a control program and an information program includes a management program and a parameter set of the information program. The control program is a program that performs scanning (processing that controls a controlled device and has real-time qualities) in a control period. The control program, in the control period, transmits a control command that is a signal indicating a code associated with an information program to be activated. The management program receives the control command, identifies the information program to be activated that corresponds to the code indicated by the received control command, reads the parameter set of the information program to be activated, generates an activation signal associated with the parameter set that has been read, and outputs the generated activation signal to the information program to be activated.

IPC Classes  ?

• G05B 19/05 - Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
• G06F 9/445 - Program loading or initiating

Abstract

This information processing device for executing applications holds, for each of the applications, a manifest file (user interface definition file) in which a user interface for the application is defined. The manifest file is designated with an attribute of data type for each item for defining a user interface object through which a setting item of the application is inputted/outputted. The information processing device generates the user interface object at which setting of the application is performed on the basis of the manifest file. Accordingly, for each of the applications, the user interface regarding setting of the application is unified, operability of a user is improved, and development efficiency of an application developer is improved.

IPC Classes  ?

• G06F 9/451 - Execution arrangements for user interfaces
• G06F 8/38 - Creation or generation of source code for implementing user interfaces

Abstract

Provided is a safety work device, such as a safety cabinet or a fume hood, with minimized equipment depth and width for saving space, wherein a plurality of HEPA filters are installed in an exhaust system to make outside leakage of contaminants as close to zero as possible. This safety work device comprises: a work space (12); a front shutter (13) that covers a portion of an opening part on the front surface of the work space; a work opening part (17) located below the front shutter, and into which a worker can put their hands to conduct work; a rear opening (18) provided on a lower part of the back surface of the work space, and which sucks air in the work space; and an exhaust flow path (30) provided on the rear side of the back surface of the work space, and which exhausts the air in the work space. The safety work device is characterized in that a first HEPA filter (31) for exhaust is disposed in the longitudinal direction on the rear side of the rear opening (18) in the exhaust flow path, and a second HEPA filter (32) for exhaust is disposed in the longitudinal direction on the downstream side of the first HEPA filter in the exhaust flow path.

IPC Classes  ?

• B01L 1/00 - Enclosures; Chambers
• F24F 7/06 - Ventilation with ducting systems with forced air circulation, e.g. by fan

Abstract

A liquid-cooled screw compressor (100), which takes in gas and generates compressed gas, comprises: screw rotors (2, 3); a casing (1) accommodating the screw rotors (2, 3) and forming an operation space (C) together with the screw rotors (2, 3); and a cartridge (6) which is a separate member from the casing (1). A liquid supply path (7) for supplying a liquid to the operation area (C) is formed by the casing (1) and the external surface of the cartridge (6).

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

In the present invention, an encoder model and a decoder model, each of which is a machine learning model, are used in inspecting an object being inspected. The encoder model accepts data pertaining to the object being inspected as input, and outputs the degree of abnormality of the object being inspected. The decoder model accepts, as input, an OK/NG value that represents whether the object being inspected is normal or abnormal and a feature quantity of the data pertaining to the object being inspected, and outputs restored data pertaining to the object being inspected on the basis of the inputted feature quantity when the inputted OK/NG value represents that the object being inspected is abnormal.

IPC Classes  ?

• G06T 7/00 - Image analysis
• G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks

Abstract

A gas compression system that can continue control of the number of operated pieces of a compressor even when an abnormality has occurred and a control method thereof are provided. The gas compression system includes compressors, a number-of-pieces controller that executes master control to control the number of operated pieces of the compressor, and a communication network that connects the compressors and the number-of-pieces controller with each other in a mutually communicable manner. Each compressor includes a compressor main unit that compresses a gas and a controller that executes slave control to control the compressor main unit in response to a command from the number-of-pieces controller. The respective controllers are configured to determine whether an abnormality of the number-of-pieces controller or an abnormality of communication with the number-of-pieces controller has occurred on the basis of whether a safety notification from the number-of-pieces controller is received and transmit a master declaration.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04B 41/02 - Pumping installations or systems specially adapted for elastic fluids having reservoirs
• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance

Abstract

Provided is a packaged, air-cooled air compressor capable of recommending to clean a cooler at an appropriate timing while holding down costs. The packaged, air-cooled air compressor comprises: two cooling paths to an air-cooled cooler and a motor in a package, the cooling paths having two cooling air intakes that take in outside air, a fan and an outlet that together discharge to the outside cooling air after cooling the cooler and the motor, and two temperature sensors that detect the temperature of bearings located at both ends of a motor shaft; a control unit that calculates the temperature difference between the bearings located on the upstream side (counter-load side) and downstream side (load side) at both ends of the motor shaft in the cooling air flow direction, and determines that the cooler is clogged if the temperature difference is less than a threshold value; and a display unit that, if it has been determined that the cooler is clogged, informs the user of a recommendation to clean.

IPC Classes  ?

• F04B 49/10 - Other safety measures

Abstract

A laminar flow at a high air speed can be maintained, and contamination caused by operation of a device or operation of the device by a person can be suppressed as much as possible. There is provided a safety cabinet that supplies clean air into a work room from above, the cabinet including: an opening portion in a front surface of the work room; a front shutter; partition plates provided on right and left side surfaces and a back surface on an upper side of the work room; and a partition on a front upper side of the work room.

IPC Classes  ?

• F24F 3/163 - Clean air work stations, i.e. selected areas within a space to which filtered air is passed
• B01L 1/02 - Air-pressure chambers; Air-locks therefor
• B01L 1/04 - Dust-free rooms or enclosures

Abstract

This inkjet printer comprises a printing head for performing printing by means of ink particles, a main body for suppling ink to a nozzle, and a control unit for controlling the printing head and the main body. The control unit: stores an L-V characteristic and an excitation voltage condition with which printing is possible, for a reference nozzle; measures the L-V characteristic representing a relationship between a cutting position of an ink column discharged from the nozzle and an excitation voltage; and calculates the excitation voltage condition for a mounted nozzle on the basis of the L-V characteristic and the excitation voltage condition with which printing is possible, for the reference nozzle, and the L-V characteristic of the mounted nozzle. Printing is then executed by applying the calculated excitation voltage condition.

IPC Classes  ?

• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/115 - Ink jet characterised by jet control synchronising the droplet separation and charging time

Abstract

A data analysis unit includes a validity determination unit that calculates a determination factor for determining the validity of a data analysis process to determine the validity of the data analysis process, and displays the validity determination result on a display device.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring

Abstract

The purpose of the present invention is to provide a failure diagnosis assistance system capable of improving failure diagnosis accuracy, and also improving the accuracy of predicting failure locations and thereby more accurately identifying failed components even when it is difficult to acquire a large amount of operating data of operating equipment.　In order to achieve the above purpose, this failure diagnosis assistance system is provided with: a failure information input unit to which failure information of a machine is input; a failure knowledge database that stores failure knowledge data associating event information with failure events; a failure event estimation unit that estimates a failure event on the basis of the failure information and the failure knowledge data; and a failure event candidate presentation unit that presents the estimated failure event. A plurality of symptoms obtained by subdividing failure modes relating to functional failures that occur in the machine due to occurrence of failures are regarded herein as failure events; event occurrence probabilities regarding the occurrence of failure events are defined in the failure knowledge database in advance; and the failure event estimation unit outputs a failure event matching the failure information from the failure knowledge data on the basis of the failure information.

IPC Classes  ?

• G06Q 10/20 - Administration of product repair or maintenance

Abstract

In order to obtain an electromagnetically operated switching device in which a decrease in the mechanical strength of a core and an increase in the size of the core are mitigated, the present invention provides an electromagnetically operated switching device comprising a fixing flat plate to which a coil and a fixed core are fixed, a plunger penetrating through the coil, a drive rod to which the plunger is connected and which moves in an axial direction together with the plunger, and a permanent magnet disposed on top of the coil, wherein the coil is excited to draw the plunger, a magnetic flux generated by the permanent magnet is allowed to flow to the opposite surfaces of the plunger and the fixed core so as to hold the drawn state of the plunger, and an electric current of the opposite direction from when the plunger is suctioned is allowed to flow through the coil to release the drawn state of the plunger. The electromagnetically operated switching device is characterized in that, on the contact-portion side of at least one of the plunger and the fixed core, which are circumferentially spaced apart by a predetermined interval and are disposed opposite each other, a slit is provided to span from the outer peripheral side to the drive rod side, the slit being formed to be shallower on the drive rod side and deeper on the outer peripheral side.

IPC Classes  ?

• H01F 7/16 - Rectilinearly-movable armatures
• H01F 7/11 - Electromagnets; Actuators including electromagnets with armatures specially adapted for ac reducing or eliminating the effects of eddy currents
• H01F 7/122 - Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnet
• H01H 33/38 - Power arrangements internal to the switch for operating the driving mechanism using electromagnet
• H01H 51/06 - Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by

Abstract

Provided is a power conversion device that can suppress fluctuations in output voltage caused by sudden changes in load. Therefore, the power conversion device 100 comprises: an AC-DC converter 101 that converts AC power into first DC power; a DC-DC converter 102 that converts the first DC power to second DC power; and a control circuit 110 that controls an intermediate output voltage V1 of the AC-DC converter 101 on the basis of an output voltage command value. The control circuit 110 corrects the output voltage command value of the AC-DC converter 101 on the basis of the change rate of the output voltage V2 of the DC-DC converter 102 and the change rate of the output current Io of the DC-DC converter 102.

IPC Classes  ?

• H02M 3/00 - Conversion of dc power input into dc power output
• H02M 7/12 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

In the present invention, a rotary electric machine is efficiently cooled. This rotary electric machine comprises a stator 6, a rotor 5 connected to a rotation shaft 10, a housing 7 that surrounds the stator and the rotor, an anti-load side end bracket 3 connected to the housing, and a fan 1 that blows cooling air from the anti-load side end bracket. The anti-load side end bracket 3 has: a first through hole 100 that allows cooling air to pass through the inside of the housing; a first tapered part 3A that has an apex between the first through hole and the outer periphery of the anti-load side end bracket, and that is inclined in the load direction from the apex to the first through hole; and a second tapered part 3B that is inclined in the load direction from the apex to the outer periphery of the anti-load side end bracket.

IPC Classes  ?

• H02K 9/04 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
• H02K 11/20 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching

Abstract

121limit2limit1limit11limit22limit11limit22limit2limit

IPC Classes  ?

• F04B 49/10 - Other safety measures

Abstract

A casing of this screw compressor has a discharge-side inner wall surface facing the discharge-side end surfaces of a male rotor and a female rotor. The discharge-side inner wall surface of the casing has a shield region which periodically appears on the discharge-side end surfaces according to a change in the engagement due to rotations of the male rotor and the female rotor, and which shields at least a portion of a trajectory of an axial communication path which is a gap sandwiched between the retreat surfaces of the male rotor and the female rotor. A longitudinal groove is provided in the shield region of the casing 4. The groove is configured so that a normal line at each longitudinal position coincides with a tangent line (direction perpendicular to the radial direction of the female rotor) in the circumferential direction of the female rotor at the position.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04B 39/12 - Casings; Cylinders; Cylinder heads; Fluid connections
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups

Abstract

An inkjet recording device includes a main body unit, a print head unit, and a head mounting unit. The main body unit includes an ink container. The print head unit includes a nozzle connected to the ink container. The head mounting unit is configured to allow the print head unit to be mounted on the head mounting unit. The head mounting unit includes a head detection unit that detects whether or not the print head unit is mounted, using a magnetic force.

IPC Classes  ?

• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/08 - Ink jet characterised by jet control for many-valued deflection charge-control type
• B41J 2/165 - Prevention of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
• B41J 2/175 - Ink supply systems
• B41J 2/185 - Ink-collectors; Ink-catchers

Abstract

Provided are a crane device and a crane control system with which the most recent operation information of a crane device can be stored in a data server, and further, motion information and emergency information, which contain a large amount of information, can be viewed on a portable information display terminal as necessary.　The crane device comprises: a plurality of driving motors including at least a hoisting motor 3 and a movement motor 5; a crane control unit 15 that controls each of the driving motors; and a communication unit 22 connected to the crane control unit 15. The communication unit 22 is equipped with: a function of periodically sending operation information to a cloud server 24 via a long-distance communication network; and a function of sending, in accordance with a request from a portable information display terminal 26, operation information to the information display terminal via a short-distance communication network. Due to this configuration, the most recent operation information of the crane device can be stored in a data server, and further, operation information can be viewed as necessary on the portable information display terminal.

IPC Classes  ?

• B66C 13/00 - Other constructional features or details
• B66C 13/18 - Control systems or devices
• B66C 13/46 - Position indicators for suspended loads or for crane elements

Abstract

In a screw compressor, a lobe profile of cross-sections perpendicular to the axial direction in a female rotor that rotates about a second rotation center changes in the axial direction. One lobe of the lobe profile of the female rotor includes: a first contour line defining a leading flank on a rotation direction side of the female rotor with a lobe bottom as a boundary point; a second contour line defining a trailing flank on an opposite side of the rotation direction; and a third contour line defining a lobe tip having both endpoints at which the female has the maximum radius. In the lobe profile of the female rotor, when a first angle, a second angle, and a third angle are respectively defined as an angle formed by two line segments linking a second rotation center as a vertex and both ends of the first contour line, an angle formed by two line segments linking the second rotation center and both ends of the second contour line, and an angle formed by two line segments linking the second rotation center and both ends of the third contour line, the third angle is greater on the delivery side in the axial direction, and the first angle is smaller on the delivery side in the axial direction.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

The present invention provides a device, a method, and a system which make it possible to rapidly dry ink dots while inhibiting the product from suffering a thermal deterioration, e.g., alteration.　The ink-dot drying device 100, which is for drying ink dots formed on an article, comprises: an air blower 50 for blowing cool air against an article (product) on which a given matter has been printed by an ink-jet printer and which is being conveyed on a conveyor; a temperature sensor 12 for measuring the temperature of the article (product); and a controller 70 for controlling the temperature of the cool air being sent by the air blower. The controller 70 controls the temperature of the cool air being sent by the air blower so that said temperature is not higher than a temperature at which the article is to be stored, before the cool air is jetted to the article.

IPC Classes  ?

• B41J 2/01 - Ink jet

Abstract

This screw compressor comprises a casing having a liquid supply mechanism for supplying a liquid to an accommodation chamber accommodating a screw rotor. The liquid supply mechanism has: a spraying hole that opens to the accommodation chamber; a swirl chamber that is located upstream of the spraying hole; and an introduction path that introduces the liquid to the swirl chamber. The casing includes first and second casing segments that are divided, where a plane such as that crossing the accommodation chamber serves as the division plane. The swirl chamber is configured from a recess that opens to a joining surface of at least one of the first and second casing segments. The introduction path is configured from a hole part or the like that opens to a joining surface of the other of the first and second casing segments.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/02 - Lubrication; Lubricant separation 

Abstract

An object of the present invention is to reduce the amount of solvent vapor floating around when a print head is cleaned in an inkjet recording device. In addition, an object is to reduce ink stains on a periphery of the print head. An inkjet recording device includes a main body portion and a print head. The main body portion includes an ink container that contains ink, and a solvent container that contains a solvent. The print head includes a nozzle connected to the ink container to discharge the pressurized and supplied ink, a charging electrode that charges ink particles discharged from the nozzle, a deflection electrode that deflects the ink particles charged by the charging electrode, and a gutter that collects the ink. In addition, a head mounting unit for cleaning the print head is provided. The head mounting unit is connected to a solvent vapor suction path for suctioning solvent vapor generated therearound.

IPC Classes  ?

• B41J 2/17 - Ink jet characterised by ink handling
• B41J 2/185 - Ink-collectors; Ink-catchers

Abstract

A sliding material having excellent wear resistance is provided. In order to address the problem, the sliding material (12) comprises a resin (12a), first particles (12b), which are disposed in the resin (12a) and are made of an inorganic material, and second particles (12c), which are disposed in the resin (12a) and are made of an inorganic material having a higher Vickers hardness than the first particles (12b). When a value obtained by diving the Vickers hardness of the second particles (12c) by the Vickers hardness of the first particles (12b) is defined as a hardness ratio and a value obtained by dividing the content of the first particles (12b) with respect to the resin (12a) by the content of the second particles (12c) with respect to the resin (12a) is defined as a content ratio, then a value obtained by dividing the hardness ratio by the content ratio is 0.3-2.8.

IPC Classes  ?

• C08L 101/00 - Compositions of unspecified macromolecular compounds
• C08K 3/013 - Fillers, pigments or reinforcing additives
• C08K 3/30 - Sulfur-, selenium-, or tellurium-containing compounds
• C08K 3/36 - Silica
• C08K 7/06 - Elements
• C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
• F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups

Abstract

A gas compressor inhibits a supply delay of a compressed gas at a time of a return from no-load operation to load operation, and also reduces the consumed motive power. A controller switches between load operation and no-load operation by controlling a suction throttle valve according to a sensed delivery-side pressure, and also controls a rotation speed of an electric motor that drives the compressor. The controller is configured to compute a capacity C of an air supply system that supplies a compressed air generated by the air compressor to a use location of the compressed gas on a basis of load operation duration t1 and no-load operation duration t2, and set a target rotation speed of the electric motor at a time of no-load operation on a basis of the capacity C of the air supply system.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
• F04C 28/26 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves using bypass channels
• F04C 28/08 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed

Abstract

An inkjet recording device having a print head cleaning function of preventing a cleaning liquid from spilling around the inkjet recording device and storing the cleaning liquid used for cleaning in a highly airtight container. The inkjet recording device includes a main body including an ink container accommodating an ink used to perform printing on a print target, and a cleaning liquid container that accommodates a cleaning liquid; a print head including a nozzle that is connected to the ink container to discharge the ink which is pressurized and supplied, a charging electrode that charges ink particles, a deflection electrode that deflects the ink particles charged by the charging electrode, and a gutter that recovers the ink particles which are not used for the printing; and a head cleaning unit including a cleaning nozzle that discharges the cleaning liquid, and an insertion port into which the print head is insertable.

IPC Classes  ?

• B41J 2/165 - Prevention of nozzle clogging, e.g. cleaning, capping or moistening for nozzles

Abstract

Provided is an oil feed type air compressor which can increase the determination accuracy regarding a deterioration state of oil. An oil feed type air compressor 1 includes a compressor main body 3, a separator 6 that separates oil from compressed air discharged from the compressor main body 3, and an oil feeding system 8 that feeds the oil separated by the separator 6 into a compression chamber of the compressor main body 3. The oil feeding system 8 includes a temperature control valve 20 that adjusts a diversion ratio for an oil cooler 18 and a diversion ratio for a bypass pipe 19 according to a temperature of the oil. The oil feed type air compressor 1 includes pressure sensors 22A and 22B located in the oil feeding system 8, a discharge temperature sensor 11 located on the discharge side of the compressor main body 3, and a controller 9 that computes, when it is estimated that the diversion ratio for the oil cooler 18 is 100% from the temperature sensed by the discharge temperature sensor 11 exceeding a predetermined value Td1, a difference ΔP between the pressure sensed by the pressure sensor 22A and the pressure sensed by the pressure sensor 22B and determines a deterioration state of the oil in reference to the difference ΔP.

IPC Classes  ?

• F04D 29/063 - Lubrication specially adapted for elastic fluid pumps
• F16N 29/00 - Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
• F04D 27/00 - Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids

Goods & Services

Time recording apparatus; measuring or testing machines and instruments; measures; dynamometers; water level gauges; pressure measuring apparatus; pressure gauges; thermometers, not for medical purposes; temperature indicators; calorimeters; flowmeters; heat regulating apparatus; hygrometers; measuring apparatus; precision measuring apparatus; measuring instruments; measuring devices, electric; detectors; power distribution or control machines and apparatus; rotary converters; phase modifiers; chargers for electric accumulators; converters, electric; electric apparatus for commutation; electric circuit closers; transformers; electrical distribution boxes; switchboards; circuit breakers; electricity distribution consoles; electric control panels; inverters; anode batteries; high tension batteries; batteries, electric; meters; electric or magnetic meters and testers; voltmeters; ammeters; galvanometers; frequency meters; electric loss indicators; telecommunication machines and apparatus; monitoring apparatus, other than for medical purposes; electric installations for the remote control of industrial operation; remote control apparatus; telecommunications transmitting sets; intercommunication apparatus; electro-dynamic apparatus for the remote control of signals; telecommunications transmitters; radiotelegraphy sets; high- frequency apparatus; boiler control instruments; personal digital assistants; optical data media; electronic machines, apparatus and their parts; computer programs; computers; data processing apparatus; computer memory devices; computer peripheral devices; computer monitors; monitors; computer hardware; interfaces for computers; laptop computers; tablet computers; computer programs, recorded; computer operating programs, recorded; computer software, recorded; computer programs, downloadable; computer software applications, downloadable; pre-recorded CD-ROMs; battery chargers Business management analysis or business consultancy; business management; marketing research or analysis; providing information concerning commercial sales; commercial or industrial management assistance; business consultancy services for digital transformation; advisory services for business management; business research; business management and organization consultancy; business management consultancy; business efficiency expert services; commercial or industrial management assistance; professional business consultancy; marketing research; commercial information agency services; market intelligence services; business appraisals; business organization consultancy; providing business information; compilation of statistics; providing commercial and business contact information; office functions, namely, filing, in particular documents or magnetic tapes; data processing services ; compilation of information into computer databases; systemization of information into computer databases; updating and maintenance of data in computer databases; providing business assistance to others in the operation of data processing apparatus, namely, computers, typewriters, telex machines and other similar office machines; providing commercial information and advice for consumers in the choice of products and services; arranging subscriptions to telecommunication services for others Construction; factory construction; providing construction information; construction consultancy; operation and maintenance of building equipment; repair or maintenance of air conditioners for industrial purposes; repair or maintenance of burners; repair or maintenance of boilers; repair or maintenance of pumps; repair or maintenance of freezing machines and apparatus for industrial purposes; services of electricians; installation, maintenance and repair of computer hardware; repair or maintenance of electronic machines and apparatus; repair or maintenance of telecommunication machines and apparatus; repair or maintenance of electric motors; repair or maintenance of power distribution or control machines and apparatus; repair or maintenance of power generators; repair or maintenance of measuring and testing machines and instruments; repair or maintenance of chemical plants; repair or maintenance of nuclear power plants Telecommunication; message sending; communications by computer terminals; transmission of electronic mail; providing information in the field of telecommunications; providing user access to global computer networks; telecommunications routing and junction services; radio communications; rental of access time to global computer networks; providing access to databases; transmission of digital files; streaming of data; computer aided transmission of messages and images; rental of message sending apparatus; arranging subscriptions to telecommunication services for others Architectural design; surveying; architectural consultancy; construction drafting; urban planning; designing of machines, apparatus, instruments or systems composed of such machines, apparatus and instruments; engineering; computer programming; design of computer-simulated models; computer software design; updating of computer software; maintenance of computer software; computer system design; software development in the framework of software publishing; development of computer platforms; writing of computer code; computer programming services for data processing; software engineering services for data processing; computer software consultancy; installation of computer software; internet security consultancy; data security consultancy; telecommunication network security consultancy; computer security consultancy; monitoring of computer systems; off-site data backup; monitoring of computer systems to detect breakdowns; technological advice relating to computers, automobiles and industrial machines; providing scientific information, advice and consultancy relating to carbon offsetting; technological consultancy services for digital transformation; Technical support services, namely, troubleshooting of computer software problems; computer technology consultancy; research on building construction or city planning; testing or research on prevention of pollution; testing or research on electricity; testing or research on civil engineering; energy auditing; scientific research in the field of environmental protection; research in the field of building construction; consultancy in the field of energy- saving; research in the field of telecommunications technology; testing or research on machines, apparatus and instruments; calibration; mechanical research; rental of measuring apparatus; rental of meters for the recording of energy consumption; rental of computers; providing computer programs on data networks; computer rental; rental of computer software; software as a service (SaaS); platform as a service (PaaS); providing virtual computer systems through cloud computing; electronic data storage

Abstract

Provided are an inkjet recording device and an inkjet recording system that includes the inkjet recording device, the inkjet recording device comprising a printing head including a nozzle, a charging electrode, a deflecting electrode, and a gutter for recovering unused ink, a main body comprising an ink feed pathway for causing ink in an ink container to circulate to the printing head, an ink recovery pathway, a solvent feed pathway for feeding a solvent in a solvent container to the ink container, and flow rate regulating portions for regulating the flows of ink and solvent in the respective pathways, a main body control portion for controlling the operation of the flow rate regulating portion of the main body and the printing head, and a head mounting unit including a head mounting portion for mounting and stowing the printing head, and a printing head detector for detecting that the printing head has been mounted, wherein, upon detecting that the printing head has been mounted in the head mounting unit, the main body control portion starts ejection of ink from the nozzle at the timing of a remotely preset time point.

IPC Classes  ?

• B41J 2/17 - Ink jet characterised by ink handling
• B41J 2/01 - Ink jet
• B41J 2/185 - Ink-collectors; Ink-catchers

Abstract

A partial discharge detector for detecting partial discharge in an object, wherein the partial discharge detector includes: a first sensor that is arranged on a grounded conductor and measures transient ground voltage; a second sensor that is arranged on an object and measures transient ground voltage; and an output unit that uses the signals from the first sensor and the second sensor as a basis to output whether there is partial discharge in the object.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage

Abstract

Provided is a novel laser marker device with which it is possible to expand a printing region, with respect to a printing subject which moves relatively and which comprises a three-dimensional printing surface.　The laser marker device comprises: a laser oscillation unit 11 for generating laser light; a beam diameter adjustment unit 12 for adjusting the beam diameter of the laser light emitted by the laser oscillation unit 11; a laser light scanning unit 13 for scanning the laser light emitted by the beam diameter adjustment unit 12; a condensing lens unit 14 for condensing the laser light emitted by the laser light scanning unit 13 onto a printing surface of a printing subject; and a control unit 16 that controls the laser oscillation unit 11, the beam diameter adjustment unit 12, and the laser light scanning unit 13. A tracking mirror unit 15 is provided to reflect the laser light emitted from the condensing lens unit 14 and project the laser light onto the printing subject which moves. The control unit 16 adjusts an emission angle from the tracking mirror unit 15 in response to the movement of the printing subject Wk1 so that the laser light emitted from the tracking mirror unit 15 is incident at a prescribed angle on the printing surface of the printing subject Wk1.

IPC Classes  ?

• B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
• B23K 26/04 - Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
• B23K 26/046 - Automatically focusing the laser beam

Abstract

According to the present invention, an unmanned aircraft is raised via an unmanned aircraft support device to thereby reduce the consumption of stored energy in the unmanned aircraft and extend the range of the unmanned aircraft. An unmanned aircraft support device 10 comprises a mounting unit 1 on which an unmanned aircraft 100 is mounted and a control unit that controls the raising and lowering of the mounting unit, wherein the mounting unit 1 is raised to a predetermined height to enable the unmanned aircraft 100 to take off. An unmanned aircraft support system comprises a server 5 that can communicate with the unmanned aircraft support device 10 and that selects, on the basis of externally inputted travel information including at least a departure point and a destination of the unmanned aircraft, a route to be flown by the unmanned aircraft 100 and one or more unmanned aircraft support devices 10 along the route.

IPC Classes  ?

• B64F 1/12 - Anchoring
• B64C 27/04 - Helicopters
• B64C 39/02 - Aircraft not otherwise provided for characterised by special use
• B64F 1/36 - Other airport installations
• B64U 80/82 - Airborne vehicles

Abstract

This power conversion device has a control unit that controls the output frequency, output voltage, and output current of a motor. The control unit calculates a first torque current command from the deviation between the speed command value and the speed estimated value of the motor, switches a control mode to either the control mode for suppressing the speed ripple of the motor or the control mode for suppressing the torque ripple of the motor, and then calculates a second torque current command from the first torque current command and the switched control mode.

IPC Classes  ?

• H02P 21/05 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Abstract

Provided is an air compressor that suppresses a rise in delivery temperature due to a change in atmospheric pressure, and consequently improves the life of parts. The air compressor 1 includes a motor 2, a compressor main body 3 driven by the motor 2 to compress air, a delivery pressure sensor 12 that senses a delivery pressure of the compressor main body 3, an atmospheric pressure sensor 13 that senses an atmospheric pressure, and a controller 15. The controller 15 compares the delivery pressure sensed by the delivery pressure sensor 12 with a set pressure, and performs operation control based on a result of the comparison. The controller 15 corrects the set pressure such that a ratio between the atmospheric pressure sensed by the atmospheric pressure sensor 13 and the set pressure becomes a set value set in advance.

IPC Classes  ?

• F04B 49/06 - Control using electricity

Abstract

An oil feed type air compressor includes a compressor main body, a separator that separates the oil from the compressed air delivered from the compressor main body, and an oil feed system that supplies the oil to the working chambers and bearings of the compressor main body. The oil feed system includes an oil cooler that includes a cooling unit and a cooling unit connected on a downstream side of the cooling unit, an oil feed pipe that is connected to an outlet between the cooling unit and the cooling unit and that supplies the oil cooled by the cooling unit to the bearings of the compressor main body, and an oil feed pipe that is connected to an outlet on a downstream side of the cooling unit and that supplies the oil cooled by the cooling units to the working chambers of the compressor main body.

IPC Classes  ?

• F04C 29/02 - Lubrication; Lubricant separation 

Abstract

A packaged compressor with enhanced electric motor coolability includes an electric motor having an axial direction that lies in a horizontal direction; a compressor body; a housing that houses the electric motor and the compressor body; a cooling air inlet formed through a side surface of the housing; a cooling air outlet formed through an upper surface of the housing; and a cooling fan arranged on a side of the electric motor such that an axial direction of the cooling fan lies in a horizontal direction and crosses the axial direction of the electric motor. The cooling fan has a diameter greater than the height dimension of the electric motor and it's its axial-direction projection plane includes a portion overlapping the electric motor, a portion positioned above the electric motor and not overlapping the electric motor, and a portion positioned below the electric motor and not overlapping the electric motor.

IPC Classes  ?

• F04B 39/06 - Cooling; Heating; Prevention of freezing
• F04B 39/16 - Filtration; Moisture separation
• F04B 17/03 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors

Abstract

A package-type compressor is provided which reduces the leakage of noise generated by a heat exchanger without suppressing the flow rate of cooling air to an electric motor. A package-type compressor is provided which reduces the leakage of noise generated by a heat exchanger without suppressing the flow rate of cooling air to an electric motor. The package-type compressor includes a cooling fan 12 that induces a flow of cooling air, an inlet duct 15A that introduces the cooling air from a cooling air inlet 13A to heat exchangers 3 to 6, a plurality of louvers 16 disposed in the inside of the inlet duct 15A, and another inlet duct 15B that introduces the cooling air from another cooling air inlet 13B to an electric motor 1. The cooling air inlet 13A is disposed such that the position thereof in the vertical direction is same as that of the heat exchangers 3 to 6. Each of the louvers 16 has a linear portion 19A that extends in a direction perpendicular to the cooling air passage surface of the heat exchangers 3 to 6 such that it is inclined to the upper side toward the heat exchangers 3 to 6 and another linear portion 19B that extends in a direction diagonal to the cooling air inlet 13A such that it is inclined to the upper side toward the cooling air inlet 13A.

IPC Classes  ?

• F04C 29/04 - Heating; Cooling; Heat insulation
• F04C 2/16 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

Provided are: an inkjet recording device with which it is possible to remotely perform maintenance and management such as a print-head cleaning process; and an inkjet recording system.　This inkjet recording system comprises: an inkjet recording device; a server connected to the inkjet recording device; a network connected to the server; and an external control device that is connected to the network and that controls the inkjet recording device via the server. The inkjet recording device comprises: a print head having a nozzle which forms particles from an ink and ejects the particles, a charging electrode for charging the ink particles, a deflection electrode for deflecting the charged ink particles, and a gutter through which unused ink is recovered; a body control unit for controlling the print head; and a head mounting unit which has a print head mounting part for accommodating the print head therein and a print head detector for determining whether or not the print head has been accommodated. In addition, the external control device comprises at least: a head mounting confirmation means for checking whether or not the print head is in a state of being mounted to the head mounting unit; and an ink ejection confirmation means for checking whether ink is being ejected from the nozzle of the print head.

IPC Classes  ?

• B41J 2/01 - Ink jet
• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/08 - Ink jet characterised by jet control for many-valued deflection charge-control type
• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism

Abstract

This transmission device receives data from a transmission source device, executes processing, and transmits the processed data to a reception destination device. The transmission device comprises a processor which executes a program group, and a storage device which stores initial configuration information and the program group, wherein each of the program groups is a program that is suitable for any one of a reception protocol, a processing protocol, and a transmission protocol, and the initial configuration information defines designation information for designating a program that is suitable for the protocol for each of the protocols. The processor: receives a selection between the reception protocol and the transmission protocol, and an input of a first configuration parameter to a first program suitable for the reception protocol and the transmission protocol; acquires first designation information for designating the first program with reference to the initial configuration information; and activates the first program by using the first designation information and the first configuration parameter.

IPC Classes  ?

• H04L 41/0806 - Configuration setting for initial configuration or provisioning, e.g. plug-and-play
• H04L 67/06 - Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]

Abstract

The present invention includes a piston (14) that includes a piston ring groove (14b) on an outer peripheral surface formed by a curved surface, and that reciprocates while pivoting in a cylinder (15); a piston ring (14c) that is mounted in the piston groove (14b) and that slides on an inner circumferential surface of the cylinder (15); and a crank shaft (11) that causes the piston (14) to reciprocate via a connecting rod (13). A center axis (AX1) of the cylinder (15) is disposed at a position separated from a rotation axis (AX2) of the crank shaft (11). A rotation stopper (14i) of the piston ring (14c) is provided in the piston ring groove (14b). In a compression step, abutment clearances (14hc), (14hd), (14he) of the piston ring (14c) are positioned on the outer peripheral surface (14a) side of the piston (14) which is in a state of being against the inner circumferential surface of the cylinder (15).

IPC Classes  ?

• F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups

Abstract

A suction flow path of a screw compressor according to the present invention comprises: a male-side flow path opening in an axial direction to a working chamber of the suction stroke of a male rotor 2 side and extending from a starting end on one side of a virtual plane to a first termination end on the other side; and a female-side flow path opening in the axial direction to a working chamber of the suction stroke of a female rotor side and extending from a starting end to a second terminal end on the other side of the virtual plane. A flow path wall of the male-side flow path includes a male-side first flow path wall facing a rotor tooth section side, and a flow path wall of the female-side flow path includes a female-side first flow path facing the rotor tooth section side. The male-side first flow path wall or the female-side first flow path wall approaches the male-side rotor tooth section or the female-side rotor tooth section moving from the starting end side to the first termination end side or the second termination end side in at least a partial section from the starting end to the first termination end or the second termination end.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
• F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Abstract

The present invention achieves highly accurate control characteristics by estimating an induced voltage coefficient of a magnet motor without rotary auto-tuning. The present invention achieves highly accurate control characteristics by estimating an induced voltage coefficient of a magnet motor without rotary auto-tuning. A first power Pc is calculated on the basis of the output voltage and output current of the magnet motor, and a second power Pc{circumflex over ( )} is calculated on the basis of the electric circuit constant, current command, output frequency, and induced voltage coefficient of the magnet motor. The induced voltage coefficient is estimated so that the calculated first power follows the second power, and the driving of the magnet motor is controlled in accordance with the induced voltage coefficient.

IPC Classes  ?

• H02P 21/16 - Estimation of constants, e.g. the rotor time constant
• H02P 21/22 - Current control, e.g. using a current control loop

Abstract

This compressor previously obtains a bearing temperature rise of a bearing and stores the bearing temperature rise as a first bearing temperature rise pattern, compares an actual second bearing temperature rise pattern of the bearing detected by a temperature sensor with the prestored first bearing temperature rise pattern, and, when it is determined that the bearing temperature rise is a temperature rise due to grease filling, performs control so that an alarm is not activated.

IPC Classes  ?

• H02P 29/62 - Controlling or determining the temperature of the motor or of the drive for raising the temperature of the motor
• F16C 33/66 - Special parts or details in view of lubrication
• F16C 41/00 - Other accessories for bearings

Abstract

This invention provides a gas compressor comprising: a compressed gas passage through which a compressed gas discharged from the compressor body passes; a temperature sensor that measures the temperature of the compressed gas passing through the compressed gas passage; a compressed gas cooler that cools the compressed gas; a condensate discharge valve that discharges condensates resulting from cooling of the compressed gas; and a controller that controls the opening/closure of the condensate discharge valve, and characterised in that the controller controls the opening/closure of the condensate discharge valve on the basis of a change in the temperature of the compressed gas measured by the temperature sensor.

IPC Classes  ?

• F04B 49/22 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by means of valves
• F04B 39/16 - Filtration; Moisture separation
• F04B 49/06 - Control using electricity
• F04B 51/00 - Testing machines, pumps, or pumping installations

Abstract

With the aim of improving the reliability of a power conversion device for driving a motor, this power conversion device is provided with a rectifying portion for rectifying an AC voltage and outputting a DC voltage, a smoothing capacitor for smoothing the DC voltage, an inverter portion into which the DC voltage is input and which outputs AC power, an inverter drive portion for outputting a gate signal to the inverter portion, a regenerative braking portion connected in parallel with the smoothing capacitor, a regenerative braking drive portion for outputting a gate signal to the regenerative braking portion, a control portion for outputting drive signals to the inverter drive portion and the regenerative braking drive portion, a regenerative braking overcurrent detecting portion for outputting an overcurrent detection signal if the current flowing through the regenerative braking portion exceeds a determination value, and a latch portion into which the overcurrent detection signal output from the regenerative braking overcurrent detecting portion is input and which outputs a gate output interruption signal to the control portion, wherein switching elements of the inverter portion and the regenerative braking portion stop in an off state when the regenerative braking overcurrent detection portion detects an overcurrent.

IPC Classes  ?

• H02P 3/22 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by short-circuit or resistive braking
• H02M 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion

Abstract

A network environment is built in an already-existing production line without significant cost to provide a novel and user-friendly inkjet printer system. A portable repeater 3 includes a carriageable storage unit and is interposed between an inkjet printer 6 and a server 5. The inkjet printer 6 and the repeater 3 are communicated with other over short-range wireless 2 to transmit print related data from the inkjet printer 6 to the repeater 3 or from the repeater 3 to the inkjet printer 6, and the repeater 3 and the server 5 are communicated with each other over a communication network 4 to transmit the print related data either from the server 5 to the repeater 3 or from the repeater 3 to the server 5. This enables building of the network environment in an already-existing production line without significant cost.

IPC Classes  ?

• G06F 3/12 - Digital output to print unit
• G06F 21/60 - Protecting data

Abstract

A motor control device for controlling a machine comprises: an identification unit that estimates an inertia moment and viscosity friction; a velocity command generation unit that generates a velocity command, which is obtained by integrating an acceleration command; a differential signal calculation unit that calculates a differential signal from acceleration commands of different times; and an identification period determination unit that determines a validity period for operating the identification unit on the basis of the differential signal, and operates the identification unit in the validity period. The motor control device drives a motor on the basis of the velocity command generated by the velocity command generation unit, and the identification unit estimates the inertia moment and viscosity friction.

IPC Classes  ?

• H02P 29/00 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
• G05B 11/36 - Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
• H02P 21/16 - Estimation of constants, e.g. the rotor time constant

Abstract

The purpose of the present invention is to provide a gas compressor with which it is possible to adjust the temperature of a heat recovery liquid discharged from an exhaust heat recovery heat exchanger to a desired temperature at low cost without installing a temperature control valve or the like in the path of the heat recovery liquid. To achieve this purpose, a gas compressor comprises a heat exchange liquid temperature sensor 34 that detects the temperature of a heat exchange liquid discharged from an exhaust heat recovery heat exchanger 11, and a path 21 through which at least some of a high-temperature fluid cooled by an air-cooled cooler 20 flows into a compressor body 1, the gas compressor also comprising a heat exchange liquid temperature sensor 34 that detects the temperature Tw2 of a heat exchange liquid discharged from the exhaust heat recovery heat exchanger 11, and a controller 37 having a heat exchange liquid temperature adjustment function for controlling the rotation speed of a cooling fan 30 so that the temperature Tw2 detected by the heat exchange liquid temperature sensor 34 approaches a prescribed target heat exchange liquid temperature Tw2t.

IPC Classes  ?

• F04B 39/06 - Cooling; Heating; Prevention of freezing
• F04C 29/04 - Heating; Cooling; Heat insulation
• F24H 1/00 - Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
• F24H 15/174 - Supplying heated water with desired temperature or desired range of temperature
• F24H 15/35 - Control of the speed of fans

Abstract

This gas compressor comprises: a low-pressure gas path that guides compressed gas discharged from a low-pressure stage compressor body to a high-pressure stage compressor body; a first low-pressure relief valve provided to a first low-pressure branch path that branches from a low-pressure gas path; a high-pressure gas path that guides compressed gas discharged from the high-pressure stage compressor body to a demand destination; a first high-pressure relief valve provided to a first high-pressure branch path that branches from the high-pressure gas path; and a control device. The first low-pressure branch path is provided downstream of a heat exchanger for low-pressure stage heat recovery. The first high-pressure branch path is provided downstream of a heat exchanger for high-pressure stage heat recovery. The control device opens the first low-pressure relief valve and the first high-pressure relief valve when switching from a load operation to a no-load operation.

IPC Classes  ?

• F04C 28/06 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
• F04B 41/06 - Combinations of two or more pumps
• F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids

Abstract

Provided are a partial discharge detection device and a partial discharge detection method capable of separating external noise from internal partial discharge and reliably detecting the internal partial discharge under a situation in which the external noise and the internal partial discharge are mixed.　The partial discharge detection device comprises: a transient grounding voltage sensor 12 that is provided in a high voltage device and that measures a transient grounding voltage; a partial discharge detection signal selection means 13, 15 for selecting a partial discharge detection signal relating to internal partial discharge among detection signals outputted from the transient grounding voltage sensor; a partial discharge generation detection means 18 for detecting a partial discharge generation signal indicating generation of the internal partial discharge from the selected partial discharge detection signal; a partial discharge generation signal holding means 19, 20 for holding the detected partial discharge generation signal; and a sampling means 23 for sampling the partial discharge generation signal held by the partial discharge generation signal holding means for each arrival of a prescribed sampling period.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage

Abstract

Provided are a power conversion device and a remote monitoring system capable of calculating the life of a power semiconductor device with high accuracy. In order to achieve the above purpose, a power conversion device, which controls the flow or interruption of a current with an inverter having a power semiconductor device and performs desired power conversion, comprises: a motor control unit which calculates a gate signal on the basis of a current value, a speed command, and a carrier frequency detected by a current sensor and controls the inverter; a temperature history calculator which estimates the loss of the power semiconductor device and calculates a temperature history; a temperature history storage device which stores the calculation result of the temperature history; and a damage calculator which calculates damage to the power semiconductor device from the temperature history read from the temperature history storage device.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 7/539 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
• H02P 29/68 - Controlling or determining the temperature of the motor or of the drive based on the temperature of a drive component or a semiconductor component

Abstract

Provided is an oil-free air compressor that prevents reverse rotation of a compressor body while the compressor is out of service, thereby preventing oil from entering the compressor body, and improving the reliability, as well as exhibiting a rust preventive effect. An oil-free air compressor 100 comprising: an oil-free compressor body 1 that compresses air and outputs the compressed air; a cooler 5 that is connected to the compressor body, and cools the compressed high-temperature air; a dry air supply mechanism that supplies dry air to an output side of the compressor body; and a mechanism that prevents reverse rotation of the compressor body while the compressor is out of service.

IPC Classes  ?

• F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups
• F04B 39/16 - Filtration; Moisture separation
• F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

This inkjet printer that comprises: a print head which includes a charge electrode for imparting a charge amount corresponding to a printing character to ink particles, a deflection electrode for causing the ink particles having passed through the charge electrode to be deflected in accordance with the charge amount, and a gutter for collecting non-charged ink particles that are not used for the printing; a control unit which supplies a charging voltage to the charge electrode on the basis of a character pattern corresponding to printing character information; and an inspection instrument which imports an image of a result of printing printed on a print object and checks the printing state. In this inkjet printer, the inspection instrument computes a dot position deviation between the dot position of an attention dot preset for each printing character and a target position of said attention dot, stores computed dot position deviations in chronological order, and determines an ink state of the ink in use on the basis of the stored dot position deviations.

IPC Classes  ?

• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/01 - Ink jet
• B41J 2/195 - Ink jet characterised by ink handling for monitoring ink quality

Abstract

This power conversion device comprises: a power conversion unit that converts a DC voltage to an AC voltage applicable to a device to be operated; a current detection unit that detects the output current output from the power conversion unit; a storage unit that stores the reference value of the output current detected by the current detection unit or the reference value of a value to be monitored from the device to be operated and the upper and lower limit values determined from the reference value; and a control unit that controls the power conversion unit. The control unit calculates the frequency of the state of exceeding the upper limit value or the frequency of the state of less than the lower limit value and determines whether there is an abnormality or not by comparing the frequency with a predetermined frequency.

IPC Classes  ?

• H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

Provided is a scroll compressor in which the swinging of an orbiting scroll can be suppressed and the power loss can be suppressed.　The scroll compressor comprises a fixed scroll 11 having a spiral wrap 16, an orbiting scroll 12 having a spiral wrap 20, a drive shaft 13 that causes the orbiting scroll 12 to revolve with respect to the fixed scroll 11, a plurality of compression chambers formed between the wrap 20 of the orbiting scroll 12 and the wrap 16 of the fixed scroll 11, a back pressure chamber 28 formed on the back surface side of the orbiting scroll 12, and a communication hole 29 formed in the orbiting scroll 12 such that the back pressure chamber 28 and the compression chamber communicate with each other therethrough. The back pressure chamber 28 communicates with the compression chamber during a discharge process via the communication hole 29 when the crank angle of the drive shaft 13 is within a first range and communicates with the compression chamber during a compression process via the communication hole 29 when the crank angle of the drive shaft 13 is within a second range.

IPC Classes  ?

• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

This management system comprises: a measured data acquisition unit that acquires measured data, which is time-series data related to operation of a device; an index computing unit that computes an index on the basis of the measured data; a credit calculation unit that compares indices before and after a change is made to the device, to calculate a credit as a compensation for a reduction in the emission of greenhouse gas; and a credit management unit that links a part of the calculated credit to a user of the device. The credit management unit links a part of the calculated credit to a system operator or a manufacturer of the device.

IPC Classes  ?

• G06Q 50/00 - Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism

Abstract

A control device 1 is provided with: a motor control unit (10, 11, etc.) that supplies a drive current to a motor 3, which is a power source of processing equipment, so as to place the motor 3 in a normal operating state, and, in response to multiplexed commands (S1, S2) that are sent from the outside and relate to a safety function operation of the processing equipment, controls the drive current so as to place the motor 3 and the processing equipment in a safety stop state; and a command monitoring unit 16 that monitors whether or not the commands (High/Low of S1, S2) match each other. If the period during which the commands do not match exceeds an allowable value, the command monitoring unit 16 generates a safety stop signal Sd (High) for safely stopping the motor 3, and continuously sends the safety stop signal Sd (High) to the motor control unit. This configuration makes it possible to facilitate the construction of a safety system that uses a control device.

IPC Classes  ?

• G05B 9/02 - Safety arrangements electric

Abstract

Provided is an electric switchboard which resists temperature rise by reducing heat intrusion from the outer surface due to exposure to sunlight. This electric switchboard comprises a box body 10 in which a substation facility is housed, a door 11 provided on the box body, and a side plate 17 provided on a side of the box body. At least one of the front, rear, and side surfaces of the switchboard is provided with a light-shielding member that is retractable and blocks sunlight. Thus, heat intrusion from the outer surface due to exposure to sunlight is reduced, and temperature rise of the electric switchboard is prevented.

IPC Classes  ?

• E04F 10/06 - Sunshades; Awnings of flexible canopy materials, e.g. canvas comprising a roller-blind with means for holding the end away from a building
• E06B 9/24 - Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance
• E06B 9/13 - Roller shutters with closing members of one piece, e.g. of corrugated sheet metal
• E06B 5/00 - Doors, windows, or like closures for special purposes; Border constructions therefor
• H05K 7/18 - Construction of rack or frame
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02B 1/30 - Cabinet-type casings; Parts thereof or accessories therefor

Abstract

Provided is a scroll compressor capable of suppressing a reduction in coolability of a radially outer section of an orbiting scroll.　The scroll compressor includes a cooling fan 25 and a cooling-air introducing path 28 that introduces cooling air generated at the cooling fan 25 into the surroundings of cooling fins 20 of an orbiting scroll 12. The cooling fins 20 include: an n-th cooling fin that is located at one side in the width direction of the cooling-air introducing path 28 parallel to an array direction of the cooling fins 20 and at an outer side of the cooling-air introducing path 28; an (n-1)-th cooling fin that is adjacent to the n-th cooling fin at the one side; and an (n+1)-th cooling fin that is adjacent to the n-th cooling fin at the other side. The leading edge of the n-th cooling fin is located downstream of an imaginary straight line connecting the leading edge of the (n-1)-th cooling fin and the leading edge of the (n+1)-th cooling fin.

IPC Classes  ?

• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

A power conversion device capable of shortening the time required for acceleration of a motor and a metal processing device including the power conversion device are provided. Then, a power conversion device 10 includes a converter 100 configured to convert an AC voltage from outside to a DC voltage Vo and a converter controller 107 configured to control the converter 100. The converter 100 includes a voltage doubler circuit 104 configured to boost the DC voltage Vo when activated, and outputs the DC voltage Vo having a voltage value different in accordance with the activation and stop of the voltage doubler circuit 104. The converter controller 107 activates the voltage doubler circuit 104 at a first time that is earlier by a predetermined period than a second time at which a speed command value ω* of the motor 130 rises from a predetermined value.

IPC Classes  ?

• H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 3/158 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 7/06 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
• H02M 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

There is provided a transformer (101) in which deformation of a coil (403, 503, 603) caused by a short-circuit electromagnetic mechanical force can be suppressed by using a coil pressing metal fitting (303, 401, 501, 601) that saves space and that is lightweight. There is provided a transformer (101) in which deformation of a coil (403, 503, 603) caused by a short-circuit electromagnetic mechanical force can be suppressed by using a coil pressing metal fitting (303, 401, 501, 601) that saves space and that is lightweight. A coil pressing metal fitting (303, 401, 501, 601) includes a coil pressing metal fitting base member (201, 301) that comes into contact with a coil (403, 503, 603), and a reinforcement member (302) disposed outside the coil pressing metal fitting base member (201, 301). The reinforcement member (302) is connected and fixed to the coil pressing metal fitting base member (201, 301) by a joining member from inside the coil pressing metal fitting base member (201, 301) through the hole (202, 204) of the coil pressing metal fitting base member (201, 301).

IPC Classes  ?

• H01F 27/30 - Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support

Abstract

There is provided a static induction electric apparatus capable of improving smoothnesses of magnetic flux distributions inside iron cores. A stationary induction electric apparatus including wound iron cores and a winding, wherein each of the wound iron cores is a laminated body of magnetic materials that are lap-joined and at least provided with a step lap joint portion on an inner peripheral side of the wound iron core, and gap distances between ends of the step lap joint potion are gradually shortened toward an outer peripheral side of the wound iron core. Although a configuration of the stationary induction electric apparatus is simple, the stationary induction electric apparatus having improved smoothnesses of magnetic flux distributions inside the iron cores can be provided.

IPC Classes  ?

• H01F 27/26 - Fastening parts of the core together; Fastening or mounting the core on casing or support
• H01F 27/28 - Coils; Windings; Conductive connections
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets