An air conditioning management controller (20) serving as a facility equipment management device comprises an initial communication processing unit (221), a periodic communication processing unit (222), a display information generation unit (224), and a display unit (242). The initial communication processing unit (221) executes a communication establishment process by means of an initial communication with facility equipment to be managed for which communication has not been established. The periodic communication processing unit (222) periodically executes a communication confirmation process by means of periodic communication, to the facility equipment for which communication has been established by the communication establishment process, for confirming whether the communication state is normal. When it is recognized on the basis of the execution results of the communication establishment process and the execution results of the communication confirmation process that a communication abnormality with the facility equipment has occurred, the display information generation unit (224) generates display information which differentiates whether said communication abnormality is an abnormality in the initial communication or an abnormality in the periodic communication. The display unit (242) displays the generated display information.
H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
A heat exchanger (1) comprises: a plurality of plate-like fins (11) that are disposed with spaces therebetween in the thickness direction; and a plurality of heat transfer tubes (12) that each pass and extend through the plurality of plate-like fins (11) in the thickness direction and that are disposed with spaces therebetween in a direction perpendicular to the thickness direction, said heat exchanger (1) being installed such that a parallel direction of the plurality of heat transfer tubes (12), in which the heat transfer tubes are aligned, is the vertical direction. The plurality of fins each have: a heat transfer tube insertion part that is open at one end edge portion in the outside air flow direction perpendicular to both the extension direction and the parallel direction of the heat transfer tubes and that is closed at the other end edge portion; and a step part (S) that extends between the other end edge portion of the plate-like fin (11) and the heat transfer tube insertion part in the parallel direction of the heat transfer tubes and forms a step in the thickness direction. The distance between the heat transfer tube insertion part and the step part that is set for each of the plurality of heat transfer tubes (12) is not more than 3 mm.
F28F 1/32 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
F28D 1/053 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or mo with the heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
3.
AIR CONDITIONING EQUIPMENT MANAGEMENT DEVICE AND AIR CONDITIONING EQUIPMENT MANAGEMENT METHOD
Regarding an air conditioning equipment management device (100A) and an air conditioning equipment management method, the air conditioning equipment management device (100A) is connected to air conditioning equipment (10) so as to be able to communicate therewith and comprises a management software storage unit (21), a determination unit (233A), and an update processing execution unit (235). The management software storage unit (21) stores management software for managing the air conditioning equipment (10). The determination unit (233A) determines, on the basis of an operation status of the air conditioning equipment (10), a degree of necessity of monitoring the air conditioning equipment (10). When update software for updating the management software has been acquired, the update processing execution unit (235) executes update processing for the management software by using the update software when the degree of necessity of monitoring the air conditioning equipment (10) is determined to be low by the determination unit (233A).
This motor driving device comprises a first inverter, a second inverter, a plurality of opening and closing connections, a plurality of semiconductor switch elements, and a controller. The controller, at the opening or closing of the opening and closing connections, executes a pseudo neutral point operation and turns on the semiconductor switch elements in advance. First wirings each have a first inductance, second wirings each have a second inductance, and third wirings each have a third inductance. The third inductance value is smaller than the total of the first inductance value and the second inductance value.
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 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
According to the present embodiment, a circuit board for device control is provided with: a processing unit configured to be able to perform various types of processing; a storage unit configured to be able to store various types of data; a power supply line for power supply to the processing unit and the storage unit; a signal line for signal transmission between the processing unit and the storage unit; a disconnection unit that makes it possible to disconnect at least one of the signal line and the portion of the power supply line that supplies power to the storage unit; and a connection unit that makes it possible to connect, to the outside, at least one of the portion of the power supply line that is on the storage unit side of the disconnection unit and the portion of the signal line that is on the storage unit side of the disconnection unit.
G06F 11/20 - Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
A refrigeration cycle device according to one embodiment comprises: a shutoff valve that is disposed in piping for connecting an indoor unit and an outdoor unit and circulating a refrigerant, and opens/closes by means of power from an alternating-current power source; a backup power source capable of alternatively supplying power for driving the shutoff valve during a power interruption of the alternating-current power source; an open/close switch disposed in a power supply path from the backup power source to the shutoff valve; a control circuit that controls the shutoff valve and the open/close switch; and a power interruption detection unit that detects a power interruption of the alternating-current power source. After closing the open/close switch when a power interruption is detected to close the shutoff valve, the control circuit opens the open/close switch.
This multi-type air-conditioning device is capable of simultaneously performing cooling and heating operations, and comprises: an outdoor unit; a plurality of indoor units each having an indoor heat exchanger and a leakage detection sensor; an SP device; and an MP device. The multi-type air-conditioning device comprises: a maintenance process unit that, when the leakage detection sensor provided in an indoor unit connected to the SP device detects leakage of a refrigerant, closes an SPL control valve and an SPG control valve corresponding to the indoor unit and stops the operation of the indoor unit, and maintains indoor units other than said indoor unit operable; and a recovery process unit that, when the leakage detection sensors provided in a plurality of indoor units connected to the MP device detect leakage of a refrigerant, operates a compressor in a state where an MPL control valve and an SPL control valve are closed to recover, to the compressor side, the refrigerant remaining in each of the indoor heat exchangers, and, after completion of the recovery of the refrigerant, closes all MPG control valves and SPG control valves and stops the compressor.
This determination device is provided with a model information storage unit (212), an information acquisition unit (231), a determination unit (233), and a correction unit (232). The model information storage unit stores a neural network model constructed with respect to the operation of a second device that is a different model than a first device to be controlled and that operates on the same operating principle as the first device. The information acquisition unit acquires input data of a first item relating to a device operating on the operating principle, a first coefficient for calculating, in the first device, output data of a second item from the input data of the first item, and a second coefficient for calculating, in the second device, output data of the second item from the input data of the first item. The determination unit determines output data of the second item for the first device from the input data of the first item using the stored neural network model. The correction unit multiplies the input data of the first item or the output data of the second item used by the determination unit by the ratio of the first coefficient to the second coefficient to correct the respective data.
This compressor comprises a cylinder, a rotating shaft, a roller, a blade, and an injection flow path. The cylinder has a spring insertion hole in which a spring that presses the blade toward the roller is disposed. The injection flow path includes at least a blade groove formed in a surface part of the blade that faces a compression chamber, among side surface parts of the blade that form a pair and face a circumferential direction with respect to the axis of the rotating shaft. A surface through which some refrigerant flows into the blade groove and a surface through which some of the refrigerant is discharged from the blade groove into the compression chamber are in the same plane.
F04C 18/356 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
A compressor (1A) comprises: a case (11); a motor (12) accommodated in the case; and a compression mechanism unit (13) accommodated in the case and configured to be capable of being driven by the motor. The inside of the case is under a high-pressure atmosphere filled with a refrigerant after compression by the compression mechanism unit (13). The compression mechanism unit (13) has, around a compression room (Cc), a gas-liquid separation room (Cb) to separate the refrigerant sucked in the compression room into a gas refrigerant and a liquid refrigerant. The gas-liquid separation room (Cb) is at least partially defined by an element forming the compression room (Cc).
F04C 18/344 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
A compressor (C) comprises a case (11), a compression mechanism (12) housed in the case (11), a motor (13) housed in the case (11) and configured to be capable of driving the compression mechanism (12), a terminal (14) provided in the upper part of the case (11) and configured to be allow connection of a lead wire for supplying electric power to the motor (12), a terminal cover (2) enclosing the terminal (14), and a sealing member (3) disposed between the terminal cover (2) and the upper part of the case (11). The terminal cover (2) has an opening part (21a) that opens in a direction perpendicular to the center axis of the case (11), and the lead wire can be drawn from the interior of the terminal cover (2) through the opening part (21a) to the outside of the terminal cover. The sealing member (3) has a sheet-form sealing member body (31) having a sealed part (31a) held between the edge of the terminal cover (2) and the upper part of the case (11), which face each other, and a protrusion (32) that is formed so as to protrude from the sealing member body (31) and that that occupies at least part of a space (S) of the opening part (21a) in projection onto a plane parallel to the central axis of the case (11).
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
H01R 13/58 - Means for relieving strain on wire connection, e.g. cord grip
A refrigeration cycle device comprises a plurality of pipes constituting a flow path through which a refrigerant flows, and a holder that holds the plurality of pipes in a bundle. The plurality of pipes includes a first pipe through which a relatively high-pressure refrigerant flows and a second pipe through which a refrigerant flows that is lower in pressure than the high-pressure refrigerant. The holder has a first holding part that holds the first pipe, and a second holding part that is constituted of a material different from that of the first holding part and that holds the second pipe.
Provided is a sterilization unit (11) whereby inspection and a replacement operation of an ultraviolet lamp (32) can be carried out safely. A sterilization unit (11) is provided with: a housing (12); maintenance panels (41, 51) which are removably attached to the outer surface of the housing (12); an ultraviolet lamp (32) which sterilizes air passing through the interior of the housing (12); a control board (65a) for the ultraviolet lamp (32); and an electrical component box (61) in which the control board (65a) is accommodated. The housing (12) is provided with a shield unit (101) which prevents ultraviolet light emitted by the ultraviolet lamp (32) from leaking to the exterior of the housing (12) through screw holes for attaching the maintenance panels (41, 51).
F24F 8/22 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
F24F 1/0076 - Indoor units, e.g. fan coil units with means for purifying supplied air by electric means, e.g. ionisers or electrostatic separators
F24F 3/16 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by ozonisation
F24F 7/003 - Ventilation in combination with air cleaning
This inverter device comprises a switching circuit that is connected to a motor having a plurality of phase windings, and a controller that controls the switching circuit. The switching circuit includes a plurality of series circuits of switch elements on the upstream side and switch elements on the downstream side along a direction for applying a direct current voltage, and the phase windings are connected to phase connection points of the switch elements of the series circuits. While sequentially switching a plurality of energization paths through which the current flows through the switch elements in a predetermined direction of the phase windings, the controller determines an abnormality of the switch elements in accordance with the state of a current flowing between the switching circuit and the motor and, before switching the energization paths, applies, to the phase windings, a reverse phase voltage for negating the current flowing between the switching circuit and the motor, through the switch elements.
H02P 27/04 - 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
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
Provided is a rotary compressor that can be made compact and that can prevent a drop in reliability of a multi-stage compression mechanism. A compression mechanism (18) of a compressor (2) includes: a low pressure-side cylinder (55) having a low pressure-side compression chamber (61) that compresses an introduced gaseous refrigerant by the motive power of a low pressure-side eccentric part (51) and that discharges such refrigerant; a high pressure-side cylinder (57) that compresses the refrigerant discharged from the low pressure-side compression chamber (61) with the motive power of a high pressure-side eccentric part (52); and a partition plate (56) provided between the low pressure-side cylinder (55) and the high pressure-side cylinder (57). The height of the low pressure-side compression chamber (61) is the same as the height of the high pressure-side compression chamber (62), and the inner diameter dimension of the low pressure-side compression chamber (61) is greater than the inner diameter dimension of the high pressure-side compression chamber (62).
F04C 18/356 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
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
Provided are: a multi-stage rotary compressor in which a fluid compressed by a low-stage compression mechanism is further compressed by a high-stage compression mechanism, wherein pressure pulsation and vibration in an intermediate pipe connecting a discharge side of the low-stage compression mechanism and a suction side of the high-stage compression mechanism can be reliably reduced, and the entire device including a muffler can be reduced in size; and a refrigeration cycle device. A rotary compressor (2) comprises a first cylinder (55) having a first compression chamber (61) for compressing and discharging introduced low-pressure refrigerant gas, a second cylinder (57) having a second compression chamber (62) for compressing introduced medium-pressure refrigerant gas, an upstream intermediate pipe (13u) that guides medium-pressure refrigerant gas discharged from the first compression chamber (61) to the outside of a sealed container (16), and an external muffler (39) connected to the upstream intermediate pipe (13u), the relationship between an outlet area S1 of the upstream intermediate pipe (13u) and a flow path cross-sectional area S2 of the external muffler (39) being 0.01≤(S1÷S2)≤0.04.
F04C 18/356 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
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
According to the embodiments, a refrigeration cycle device (1) comprises an accumulator (24) and a compressor (21). The refrigeration cycle device (1) also comprises a temperature sensor (G) that is provided to a downstream channel of the accumulator (24) and detects temperature data for a refrigerant in the channel and a determination means (F2) that determines refrigerant leakage on the basis of the temperature data.
A power supply circuit according to an embodiment of the present invention comprises: a three-phase reactor connected at one end to phase terminals of a three-phase AC power source; a converter main circuit formed by connecting six switching elements on a three-phase bridge basis; a smoothing capacitor connected between output terminals of the converter main circuit; a voltage detection unit that detects a terminal voltage of the smoothing capacitor; a phase detection unit that detects the phase of the AC power source; and a control unit that divides one cycle of the AC power source into a plurality of periods, and exclusively switches the six switching elements in accordance with a predetermined on-off pattern during the periods. The control unit corrects the on-off pattern in the switching so as to suppress fluctuation in the terminal voltage detected by the voltage detection unit.
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
Provided is a light-shielding grille having a reliable light-shielding grille structure that allows air in and out but does not leak light, and composed of a small number of components. The light-shielding grille (21) according to an embodiment comprises: a plurality of louvers (22) each having a substantially V-shaped transverse cross section; and a frame body (23) that accommodates the plurality of louvers (22) overlapping each other in a state in which the orientations of the apexes of the V-shapes are aligned. The louvers (22) each have a projection (232d) at the longitudinal end, and the frame body (23) has an engagement portion (234) that engages with the projection (232d) of the louver (22). The engagement portion (234) holds the louvers (22) in the frame body so that the shortest distance between the apex of the V shape of a louver (22) and an imaginary straight line connecting the ends of the V shape is greater than the distance between the apex of the louver (22) and the apex of the other louver adjacent to the louver (22).
F24F 13/08 - Air-flow control members, e.g. louvres, grilles, flaps or guide plates
F24F 8/22 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
Provided is a sterilization unit (11) that can safely perform the work of inspecting or replacing an ultraviolet lamp (32). A sterilization unit (11) is provided with: a housing (12); an ultraviolet lamp (32) for sterilizing air which passes through the inside of the housing (12); a control board (65a) for the ultraviolet lamp (32); and an electrical component box (61) which is provided on one side surface of the housing (12) and houses the control board (65a). The electrical component box (61) is provided with: a base part (62) fixed to the housing (12); a first lid part (63) and a second lid part (64) which are swingably connected to the base part (62); and a microswitch (72) which detects that the second lid part (64) is not in a predetermined position, wherein the control board (65a) is mounted on the first lid part (63).
F24F 8/22 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
Provided is an outdoor unit of a refrigeration cycle device in which it is possible to prevent the occurrence of rusting in a compressor and in which water does not readily accumulate within the outdoor unit. This outdoor unit (2) of a refrigeration cycle device comprises a casing (10) provided with a bottom plate part (10a), a partition plate part (20) that stands upright above the bottom plate part (10a) and divides the interior of the casing (10) into a machine chamber A1 and a heat exchange chamber (A2), a compressor (101) that is accommodated in the machine chamber (A1) and secured to the bottom plate part (10a), and an outdoor heat exchanger (103) that is accommodated in the heat exchange chamber (A2) and secured to the bottom plate part (10a). The bottom plate part (10a) has four corner sections (201, 202, 203, 204), and a flange section (200) that extends upward along the peripheral edge of the bottom plate part (10a). The flange section (200) has a cutout section (210) at least at one of the four corner sections. A lowermost cutout part (210A) of the cutout section (210) is lower than a lowermost compressor part (101A) of the compressor (101).
The air conditioner 1 according to an embodiment comprises: an outdoor unit 2; an indoor unit 3 connected to the outdoor unit 2 by refrigerant piping; a shutoff unit 4 capable of shutting off the flow of refrigerant in the refrigerant piping between the outdoor unit 2 and the indoor unit 3; and a refrigerant leak detector 30a that detects a refrigerant leak. The shutoff unit 4 is provided with a shutoff valve 41 that shuts off the flow of the refrigerant in the refrigerant piping, and a valve control unit 42 serving as a control unit that controls the operation of the shutoff valve 41. The shutoff valve 41 is an electric valve driven by a motor. If a refrigerant leak is detected by the refrigerant leak detector 30a, the valve control unit 42 controls the shutoff valve 41 to be closed at an operation speed (v1), and then controls the shutoff valve 41 to be retightened at an operation speed (v2) slower than the operation speed (v1).
An air conditioner 1 according to an embodiment of the present invention comprises: a blocking unit 4 that can block a flow of a refrigerant in refrigerant piping that connects an outdoor unit 2 and an indoor unit 3; a power storage section 5 that can supply power to the blocking unit 4 if supply of power from an external power source 8 has been interrupted; a refrigerant leak sensing section 30a that senses refrigerant leaks; and a power source interruption sensing section 42a that senses interruption of power supply from the external power source 8. The blocking unit 4 comprises: a blocking valve 41 that is driven by a motor and blocks the flow of the refrigerant in the refrigerant piping; and a valve control section 42 that controls operation of the blocking valve 41. If a refrigerant leak has been sensed or if interruption of power supply from the external power source 8 has been sensed, the valve control section 42 closes the blocking valve 41, and controls the operation speed of the blocking valve 41 when a refrigerant leak has been sensed so as to be faster than the operation speed of the blocking valve 41 when the interruption of power supply from the external power source 8 has been sensed.
A refrigeration cycle device of an embodiment of the present invention has a machine compartment, a first plate, and a second plate. The machine compartment accommodates component parts. The first plate is provided to a casing of the machine compartment. A first hole into which an anchor bolt is inserted is formed in the first plate. The second plate is provided inside the outer periphery of the casing. A second hole into which a suspension tool is inserted is formed in the second plate. The distance between the normal of the first plate passing through the center of the first hole and the normal of the second plate passing through the center of the second hole is larger than the sum of the radius of the first hole and the radius of the second hole.
A heat exchanger according to an embodiment of the present invention comprises a plurality of fins (41) and a plurality of heat exchanger tubes (42) with a flat cross-section. The fins (41) each have: a heat exchanger tube insertion portion forming an insertion hole that opens at one end edge in the flow direction of outside air to a heat exchanger and into which a heat exchanger tube (42) is inserted; a stepped portion (46) that forms a step in the thickness direction extending in the direction of gravity between the other end edge in the flow direction and the heat exchanger tube insertion portion; and a plurality of protrusions that are formed between the stepped portion and the heat exchanger tube insertion portion so as to correspond to the plurality of heat exchanger tubes (42) and that protrude in the thickness direction of the fin from the surface of the fin (41). The protrusions each have an upper end and a lower end that are located below the corresponding first heat exchanger tube among the plurality of heat exchanger tubes. The upper end is more distant from the stepped portion in the flow direction than one end of the first heat exchanger tube closer to the stepped portion. The lower end is closer to the stepped portion in the flow direction than the one end of the first heat exchanger tube and is located below a second heat exchanger tube that is downwardly adjacent to the first heat exchanger tube.
F28F 1/32 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
F28F 17/00 - Removing ice or water from heat-exchange apparatus
F28D 1/053 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or mo with the heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
An air conditioner according to one embodiment of the present invention comprises an outdoor unit, an indoor unit, a pipe, a battery unit, a permission unit, and a valve control unit. The indoor unit cools or heats the interior of a room with the refrigerant supplied from the outdoor unit. The pipe connects the outdoor unit and the indoor unit and allows the refrigerant to flow therethrough. The battery unit supplies power when the power supply from an AC power supply is stopped. A shutoff valve opens and closes the pipe with electric power from the AC power source or from the battery unit. The permission unit permits the shutoff valve to close. The valve control unit closes the shutoff valve with electric power from the battery unit when the supply of electric power from the AC power source to the shutoff valve stops after the permission from the permission unit, and before the permission from the permission unit, maintains the opening of the pipe by the shutoff valve even if the supply of electric power from the AC power source to the shutoff valve stops.
Provided is an impeller in which stress concentration at a portion where a hub section and blade sections are densely packed can be reduced without providing a fillet at the bases of the blades. An impeller (23) comprises a hub section (33) disposed on a rotation center line C, a main plate section (31) projecting from the hub section (33) and extending radially on a plane orthogonal to the rotation center line, and a plurality of blade sections (32) projecting in one normal direction of the main plate section (31) so as to be arranged in an annular form, the plurality of blade sections (32) being open, and the outermost diameter (D2) drawn by the plurality of blade sections (32) being greater than the outermost diameter (D1) of the main plate section (31). The blade sections (32) are connected only to the main plate section (31), and each blade section has a leading edge (41) close to the rotation center line C, a trailing edge (42) far from the rotation center line C, and in a root section joined to the main plate section (31), a wing-side curved section (51) where the leading edge (41) curves away from the hub section (33) as the leading edge approaches the main plate section (31).
Provided is a fan having improved blowing efficiency. A fan according to an embodiment comprises blades and a bell mouth. The blades rotate around a rotary axis along a first direction. The bell mouth includes a step structure positioned around the blades along a first plane perpendicular to the first direction. The step structure is formed such that an opening surrounded by the step structure expands in a direction of blowing by the blades.
This indoor unit for an air conditioner comprises a heat exchanger, a blower, and a casing. The casing is configured in a box shape that opens toward the indoors, the casing accommodating the heat exchanger and the blower. The shape of the casing is also defined by a structure having an inner layer part that is not exposed to the exterior and an outer layer part that is exposed to the exterior and is arranged adjacent to the inner layer part. The structure is configured such that a first portion and a second portion are present alongside one another. The first portion has a plurality of voids in the inner layer part and the outer layer part. The second portion has voids in the inner layer part and the outer layer part, the density of voids per unit volume in the second portion being lower than that in the first portion. The second portion is arranged at a location to which is applied external force greater than that at the location in the casing where the first portion is arranged.
This refrigeration cycle device comprises a refrigerant circuit, a compressor, a condenser, an evaporator, a branch path, an expansion valve, an adjustment valve, a first temperature detection unit, a first pressure detection unit, a second temperature detection unit, a second pressure detection unit, and a control unit. The control unit determines excess or deficiency of an encapsulated quantity of refrigerant encapsulated in the refrigerant circuit on the basis of relationships among the temperature of refrigerant discharged from the compressor detected by the first temperature detection unit, the pressure of refrigerant discharged from the compressor detected by the first pressure detection unit, the temperature of refrigerant taken into the compressor detected by the second temperature detection unit, the pressure of refrigerant taken into the compressor detected by the second pressure detection unit, and the aperture of the adjustment valve.
This heat exchange unit is provided with: a heat exchanger having a header formed of metal; a casing that accommodates the heat exchanger and is formed of a metal having a smaller ionization tendency than that of the header; and an electrically insulating securing member that is secured to both the header and the casing so as to separate the header and the casing from each other. A drainage channel is formed in a contact surface of the securing member in contact with the header.
The present invention provides a power conversion device that is connected in parallel with an air conditioner to a plurality of power supply lines of an AC power system to which the air conditioner is connected with a breaker interposed. The power conversion device has a plurality of unit converters including a plurality of switch elements and a capacitor connected to an output terminal via these switch elements, DC voltage of a plurality of levels is outputted from the output terminal by turning on and off each switch element, and a multilevel converter formed by serially connecting these unit converters is provided at the downstream side from the breaker in each of the power supply lines.
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
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
The purpose of the present invention is to provide a compressor that enables reducing the heat generated by sliding. This compressor is provided with a compression mechanism that compresses a refrigerant inside of a sealed container, wherein the compression mechanism contains Cr, and is provided with a first member (55) and a second member (53) that slide against each other; the first member (55) is obtained by forming a chrome layer (81) and a nitride layer (82) in that order on the surface of a substrate (80); the nitride layer (82) includes a CrN and TiN, and a carbide is precipitated on the surface of the second member (53). As the refrigerant, the compressor is favorable when using an unsaturated refrigerant or a mixed refrigerant containing an unsaturated refrigerant, and a carbon dioxide or a mixed refrigerant containing carbon dioxide.
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
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
34.
HARMONIC SUPPRESSION SYSTEM AND ACTIVE FILTER DEVICE
Provided is a harmonic suppression system capable of appropriately suppressing harmonic currents overall in a configuration that is provided with a number of active filter devices that is less than the number of control modules. Sensor signals from two or more current sensors (5(A)-5(B)) are input into an active filter device (6(1)), and control is executed for using the the active filter device (6(1)) to suppress harmonic currents flowing out toward a commercial AC power source (2). A control unit (4) executes control where when operation of one or more inverters (module 3(B)) is stopped, the current sensor (5(A)) is connected to the active filter device (6(1)) to which the inverter which stopped operation is connected, and harmonic current is suppressed for an inverter (module 3(A)) that is continuing to operate.
Proposed are a refrigeration cycle device and a leak inspection method for the refrigerant pipe of the refrigeration cycle device, which enable easy inspection of leaks at the joints of the refrigerant pipe even if the joints are placed in any location, including extremely narrow spaces that are difficult to approach and have low accessibility. A refrigeration cycle device (1) comprises: a plurality of tubing materials (22); a refrigerant pipe (9) including a joint (23) that joins the tubing materials (22) by brazing or welding; and a piping cover (21) that covers at least a portion of the refrigerant pipe (9) including the joint (23) and has a leak inspection port (25) that allows gas to flow out from the inside to the outside.
This high harmonic suppression device comprises: a power converter that is connected to a system line between an AC system and a load, and that generates AC voltage and outputs the result to the system line; and a control means that detects a high harmonic component of load current flowing in the system line, determines a target value for compensating current to be added to the load current in order to suppress the high harmonic component, multiplies the target value by a gain based on the impedance between the system line and the power converter, thereby determines the compensating voltage required to supply compensating voltage corresponding to the target value to the system line, and causes the compensating voltage to be generated and output by the power converter.
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
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
37.
REFRIGERATION CYCLE DEVICE, REFRIGERANT LEAK DETECTION SYSTEM, AND INFORMATION PROCESSING DEVICE
This refrigeration cycle device (10) has an air conditioner (11), a plurality of sensors, an aperture prediction unit (142), a prediction error calculation unit (143), a prediction error correction unit (144), and a leak detection unit (145). The air conditioner (11) has a compressor (21), a condenser (22), an electronic expansion valve (23), and an evaporator (24). The plurality of sensors respectively detect the discharge gas temperature, the intake gas temperature, the evaporation pressure, and the condensation pressure in the air conditioner (11). The aperture prediction unit (142) derives, on the basis of the output of the plurality of sensors and the operation frequency of the compressor (21) in a prescribed sampling interval, a predicted aperture of the electronic expansion valve (23) when it is assumed that the air conditioner (11) is operating normally. The prediction error calculation unit (143) derives a prediction error by subtracting the actual aperture of the electronic expansion valve (23) from the predicted aperture in the prescribed sampling interval. The prediction error correction unit (144) derives a plurality of prediction errors for offset computation by using prescribed sampling count data in advance. The prediction error correction unit (144) also derives an offset value as an average value of the plurality of prediction errors for offset computation, derives a corrected prediction error by subtracting the offset value from a current prediction error, and outputs the corrected prediction error. The leak detection unit (145) senses a refrigerant leak in the air conditioner on the basis of the corrected prediction error.
A shut-off valve control device for a refrigeration cycle according to an embodiment of the present invention comprises: a leakage detection unit that detects leakage of a cooling medium which is used in a refrigeration cycle including an indoor unit and an outdoor unit; a shut-off valve that is disposed to a pipe which connects the indoor unit with the outdoor unit and that can be opened and closed by supply of electric power; a power failure detection unit that detects power failure in an AC power source which supplies electric power to the shut-off valve; a backup power source that is configured to alternatively supply power when power failure has occurred; and a shut-off valve control circuit that controls the shut-off valve to be closed when the leakage detection unit has detected leakage of the cooling medium, wherein when the power failure detection unit has detected power failure, the shut-off valve control circuit causes the backup power source to start to supply power and, when the power failure detection unit continues to detect power failure even after a predetermined time period has elapsed, the shut-off valve control circuit controls the shut-off valve to be closed.
A heat exchanger according to an embodiment of the present invention has a plurality of heat exchange tubes and headers. The heat exchange tubes are formed with refrigerant channels through which a refrigerant flows. The headers are provided at the ends of the heat exchange tubes. At least one of the headers is formed with a confluence/distribution channel. The confluence/distribution channel merges the refrigerant from two or more of the plurality of heat exchange tubes and distributes the refrigerant to the other two or more heat exchange tubes.
A heat exchanger (4) of the present embodiment comprises heat exchange tubes (30), headers (10), and a temperature sensor (40). A refrigerant circulates through the heat exchange tubes (30). One header (10) is connected to an end of the heat exchange tubes (30). The temperature sensor (40) measures the temperature of the refrigerant. At least one of the headers (10) includes an intermediate plate (14) and two end plates (11, 17). The intermediate plate (14) has formed therein one or a plurality of spatial flow channels (16) through which the refrigerant flows. The two end plates (11, 17) sandwich the intermediate plate (14) in the thickness direction. A mounting part (18) that positions at least a part of the temperature sensor (40) in the spatial flow channel (16) is provided to the header (10).
An air-conditioning system of an embodiment has a first indoor unit and a second indoor unit. The first indoor unit controls the temperature of the interior of a space by controlling the blowing of warm air from above the space into the interior of the space. The second indoor unit controls the blowing of warm air from under the floor of the space into the interior of the space on the basis of the temperature of the lower part of the space.
This air conditioner comprises an outdoor unit, an indoor unit, a refrigerant cut-off unit, an airtight state detection unit, a notification unit, and a control unit. The refrigerant cut-off unit cuts off or reinstates the flow of refrigerant flowing into the indoor unit and the flow of refrigerant flowing out from the indoor unit. The airtight state detection unit detects an airtight state of piping in the indoor unit. The notification unit issues notification of the results of detection by the airtight state detection unit. The control unit assesses a refrigerant cut-off condition indicating whether the flows of refrigerant flowing into and out from the indoor unit are to be cut off. When the refrigerant cut-off condition is satisfied, the control unit causes the refrigerant cut-off unit to cut off the flows and causes the notification unit to issue notification of the result of detection of the airtight state of the piping as detected by the airtight state detection unit in the indoor unit for which the flows of refrigerant are cut off.
This refrigeration cycle device comprises a main flow path for refrigerant, a compressor, a condenser, an evaporator, a branch path through which some of the refrigerant flowing form the condenser to the evaporator branches from the main flow path at a location downstream of the condenser, an expansion valve that adjusts the flow rate of the refrigerant flowing through the branch path, a supercooling heat exchanger that carries out heat exchange between the refrigerant flowing through the branch path via the expansion valve and the refrigerant flowing through the main flow path downstream of the condenser, an injection flow path through which the branch-flow-side refrigerant flowing out from the supercooling heat exchanger is injected into the compressor, and a control unit. The control unit: determines a determination condition for adjusting the opening degree of the expansion valve; and adjusts the opening degree of the expansion valve, in accordance with whether the determination condition is met, on the basis of either a first target value pertaining to the discharge temperature of the refrigerant discharged from the compressor or a second target value pertaining to the superheating temperature of the refrigerant flowing through the injection flow path.
Provided is a blower device which efficiently takes in air from a bell mouth and can blow air with high efficiency. A blower device (6) comprises an annular bell mouth (7); a downstream-side surface (19) which is flat and continuous with the downstream-side end (7b) of the bell mouth (7); and an impeller (23) which takes in air from the bell mouth (7) and blows air out in the direction along the downstream-side surface (19). The impeller (23) comprises a main plate part (31) which is substantially parallel to the downstream-side surface (19) and which extends radially, and a plurality of open-type blade parts (32) which protrude from the main plate part (31) toward the downstream-side surface (19) and the bell mouth 7, and which are arranged in an annular manner. The maximum outer diameter drawn by the plurality of blade parts (32) is larger than the maximum outer diameter of the main plate part (31). The protruding ends (32a) of the blade parts (32) each have a first part (45) which is disposed in proximity to the downstream-side surface (19), and a second part (46) which protrudes more toward the upstream-side end (7a) of the bell mouth (7) than the downstream-side end (7b) of the bell mouth 7.
In one embodiment, an information management system for autonomously controlling manufacturing processes and equipment is provided by diversifying a feedback loop (which may be simply referred to as a control loop) within a CPS system. One embodiment is applied to an information management system for autonomously performing operational control in manufacturing processes and services. A loop connection unit connects a feedback loop in a cyber-physical system. An information acquisition unit acquires specific information necessary for the manufacturing processes and services from the feedback loop. An information analysis unit analyzes the specific information. On the basis of an analysis result acquired by the information analysis unit, an autonomous operational control unit causes the operational control to be autonomously performed.
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control (DNC), flexible manufacturing systems (FMS), integrated manufacturing systems (IMS), computer integrated manufacturing (CIM)
This heat pump-type heat source device comprises a compressor, a water heat exchanger, an air heat exchanger, a four-way valve, an expansion valve, first and second temperature sensors, and a control unit. The first temperature sensor detects a first temperature of a refrigerant guided by the four-way valve and suctioned into the compressor. The second temperature sensor detects a second temperature of the refrigerant decompressed by the expansion valve and flowing into the air heat exchanger. The control unit calculates the degree of superheating of the refrigerant by subtracting the second temperature from the first temperature, and, when changing the opening degree of the expansion valve so that the calculated degree of superheating becomes a target value, corrects the target value by using a first correction value that changes according to the heat exchange when the refrigerant discharged from the compressor and the refrigerant suctioned into the compressor pass through the four-way valve.
An indoor unit for an air conditioner according to the present invention includes a heat exchanger, a control unit, a housing, a fan, an air outlet unit, and an attachment. A lead wire is connected to the control unit. The housing accommodates the heat exchanger and the control unit, and has an opening facing the heat exchanger. The fan generates an airflow of air subjected to heat exchanging by the heat exchanger. The air outlet unit has a first air inlet from which the airflow generated by the fan flows in, a first air outlet that blows the airflow out into a room space, and a first channel through which the airflow passes from the first air inlet to the first air outlet. The attachment is interposed between the housing and the air outlet unit in a detachably-mounted manner, such that an axial direction of the first air outlet is inclined as to an axial direction of the opening.
F24F 13/065 - Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as cylindrical or spherical bodies which are rotatable
This indoor unit for an air conditioner comprises: a unit body that has an inlet and an outlet, houses a heat exchanger and a blower inside, and is mounted on a wall surface of a room; a drain pan that is disposed at the bottom of the heat exchanger and receives drain water generated and dripping from the heat exchanger during the refrigeration cycle operation; and a drain hose that is connected to the drain pan and discharges the drain water received by the drain pan to the outside of the unit body. The unit body or the drain pan has a fixing part for positioning and fixing the drain hose. The drain hose has a part to be fixed that is positioned and fixed to the fixing part. The fixing part and the part to be fixed have a coupling mechanism that is accessed from the direction facing the wall surface and couples the two parts together.
This indoor unit for air conditioners comprises: an indoor unit main body which holds an indoor heat exchanger and indoor fan, and which is mounted to a wall surface; and a front panel which covers the front of the indoor unit main body. The front panel includes a one-side part and an other-side part in a direction orthogonal to the vertical direction of the wall surface, and a center part which is positioned between the one-side part and the other-side part. The one-side part and the other-side part each have a shape so as to curve from the location of connection with the center part toward the wall surface side, and the portion further past the curved part extends to the position of the wall surface, at an acute angle with respect to the wall surface.
This refrigeration cycle device is provided with a refrigerant circuit through which a refrigerant circulates, the refrigeration cycle device comprising: a compressor that discharges a gas-phase refrigerant, a heat-source-side heat exchanger; a first expansion valve; a use-side heat exchanger; and an injection channel through which a portion of a liquid-phase refrigerant is distributed and injected into the compressor. In the injection channel, an electromagnetic valve, a check valve, and a second expansion valve are disposed, in that order from the upstream side of the flowing direction of the liquid-phase refrigerant in the injection channel. The second expansion valve enters a stopped state without being fully closed and having an aperture larger than the full closure.
Provided are a compressor and a refrigeration cycle device which can reduce the supplied amount of lubricating oil to a space formed by a sub-bearing and a sub-muffler attached to the sub-bearing , and which can improve performance and reliability. A rotary compressor (2) has a through path (91) which connects the inside of a sealed container (11) and a storage space (90) that stores lubricating oil (21) supplied to a compression mechanism unit (13) via an oil supply mechanism unit (22), said storage space being surrounded by a lower surface of an eccentric part (36), an inner circumferential surface of a roller (43), and an upper surface of a sub-bearing (17).
Provided are a compressor and a refrigeration cycle apparatus having a lubricating structure capable of stably lubricating a sliding portion between a rotary shaft and each bearing. A compression mechanism portion (13) of a compressor (2) is provided with: a main bearing (16) rotatably supporting a main shaft portion (15a) of a rotary shaft (15); a sub-bearing (17) rotatably supporting a sub-shaft portion (15b) of the rotary shaft (15); three or more annular cylinders (42) stacked on each other and arranged between the main bearing (16) and the sub-bearing (17); vanes (44) each arranged in each of the cylinders (42) and reciprocating in the radial direction of the cylinder (42); and a plurality of partition plates (45A, 45B) serving as partitions between the cylinders (42, 42) adjacent to each other. The partition plate (45B), which is one of the plurality of partition plates (45A, 45B), includes an intermediate bearing (45Bb) rotatably supporting an intermediate shaft portion (15A) of the rotary shaft (15). The intermediate bearing (45Bb) has a first oil supply groove (81) provided in an inner peripheral surface (45Bc), along which the rotary shaft (15) is to be inserted, and extending toward a second cylinder (42B).
Provided is a power conversion device which can ensure a suitable operational voltage for a drive unit and a voltage detection unit of each unit converter of a multilevel converter, and which can thereby simplify the configuration and lower the cost of the device. Each unit converter of the multilevel converter includes: first and second output terminals; a plurality of switch elements; a capacitor connected to the first and second output terminals via the switch elements; a drive unit which is actuated by the voltage of the capacitor and drives the individual switch elements on/off in accordance with a drive signal from a control unit; and a voltage detection unit which is actuated by an operational voltage output from a power supply unit for control of the control unit and detects the voltage of the capacitor. A plurality of levels of direct-current voltages are output by the selective formation of a plurality of conduction paths created by on/off of the individual switch elements. The control unit outputs the drive signal to the drive unit on the basis of a detection result of the voltage detection unit of each unit converter.
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
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
H02M 7/72 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Provided is an outdoor unit for an air conditioner, wherein moisture such as rainwater can be prevented from reaching an electrical component, and thus the soundness of the electrical component can be more reliably maintained. This outdoor unit 1 comprises: two bellmouths that have substantially the same shape, are linked in a facing manner in a condition in which one bellmouth 12 is rotated 180 degrees relative to the other bellmouth 12 around the rotational center axis of a blower 6, and demarcate two ventilation passages 42 in which two blowers 6 are positioned, and a non-ventilation space 58 demarcated by outer sides of the two ventilation passages 42 and an inner surface of a housing 3; and an electrical component 59 that is positioned in the non-ventilation space 58. Each bellmouth 12 has a gutter 61 that is positioned directly below a joint 41 of the two bellmouths 12.
This air conditioner management system comprises an air conditioner (10), and a portable terminal (20) that is carried by an operator who performs maintenance and inspection and that is connected by short-range wireless communication to the air conditioner. The portable terminal (20) has: a GPS information acquisition unit (271) that receives a GPS signal and acquires position information pertaining to the terminal itself; an input information acquisition unit (272) that acquires position information inputted through a manual operation; and a terminal information processing unit (273) that adds, to the acquired position information, acquisition classification information indicating whether said position information is the position information acquired from the GPS signal or the position information inputted through the manual operation, and that transmits the information to the air conditioner (10). The air conditioner (10) has a storage unit (112c) that stores the position information and the acquisition classification information transmitted from the portable terminal (20).
The outdoor unit for an air conditioner according to the present embodiment is provided with an outdoor unit body having an opening on a surface thereof, and a lid member for closing the opening, wherein the lid member has a first claw part, and the outdoor unit body has a first locking hole for locking the first claw part.
An air conditioner according to an embodiment has a plurality of outdoor units, at least one indoor unit, and a control unit. The plurality of outdoor units are connected in parallel to the same refrigerant piping system and have an outdoor expansion valve, an outdoor heat exchanger, a four-way valve, and a compressor. The at least one indoor unit is connected to the refrigerant piping system and has an indoor heat exchanger, an indoor expansion valve which adjusts an inflow amount of the refrigerant into the indoor heat exchanger, and an indoor blower. The control unit respectively divides the plurality of outdoor units into either one of two groups on the basis of the operation capability of the outdoor unit, and causes each group to perform a defrosting operation to remove frost attached to the outdoor heat exchanger.
F24F 11/42 - Defrosting; Preventing freezing of outdoor units
F24F 11/54 - Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
An air conditioner according to one embodiment comprises an outdoor unit, an expansion valve kit, at least one air handling unit, and a controller. The outdoor unit has a compressor, an outdoor heat exchanger, an outdoor blower, an outdoor expansion valve, and a control unit which controls the operation of the compressor. The expansion valve kit has an indoor expansion valve. The air handling unit has an indoor heat exchanger and an indoor blower. The controller causes the indoor expansion valve to operate. When a parameter value indicating a temperature change of the air blown out from the indoor blower or a parameter value indicating a temperature change of the air sucked in by the indoor blower is not within a range defined by a first threshold value and a second threshold value lower than the first threshold value, the control unit or the controller respectively adjusts the degree of opening of the expansion valve and the change period of the degree of opening or the operating frequency of the compressor and the change period of the operating frequency.
F25B 1/00 - Compression machines, plants or systems with non-reversible cycle
F24F 11/83 - Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
The purpose of the present invention is to provide an air conditioner capable of maintaining air-conditioning performance even in the event of failure of one of a plurality of outdoor units. This air conditioner, in which two or more outdoor units and one or more indoor units are connected in parallel to the same refrigerant piping, comprises a control unit that determines the operation priority of the two or more outdoor units on the basis of the operation capacity of the two or more outdoor units. The control unit switches the operation priority of the two or more outdoor units between the descending order of the operation capacity of the outdoor units and the ascending order of the operation capacity of the outdoor units at regular time intervals.
F24F 11/32 - Responding to malfunctions or emergencies
F24F 11/86 - Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
This air conditioner, in which an indoor unit and an outdoor unit are connected by piping, and which conditions the temperature inside a space in which the indoor unit is installed, comprises a control unit for controlling the indoor unit and the outdoor unit. The outdoor unit includes a first outdoor heat exchanger which exchanges, with outside air, heat of a temperature of a medium flowing in from the piping, and a second outdoor heat exchanger which exchanges, with outside air, the heat of the temperature of the medium flowing in from the piping, and is provided on a lower side of the first outdoor heat exchanger. The control unit includes a first defrosting means for simultaneously removing frost from the first outdoor heat exchanger and the second outdoor heat exchanger, and a second defrosting means for starting defrosting of the second outdoor heat exchanger first, and defrosting the first outdoor heat exchanger after a delay from the start of defrosting of the second outdoor heat exchanger.
The air conditioner according to an embodiment of the present invention has a plurality of outdoor units, at least one indoor unit, and a control unit. The plurality of outdoor units are connected in parallel to the same refrigerant piping system, and each have an outdoor expansion valve, an outdoor heat exchanger, a four-way valve, a compressor, a discharge pressure sensor that detects the pressure of the refrigerant discharged from the compressor, and a suction pressure sensor that detects the pressure of the refrigerant sucked into the compressor. The at least one indoor unit is connected to the refrigerant piping system and has an indoor heat exchanger, an indoor expansion valve that adjusts the amount of refrigerant flowing into the indoor heat exchanger, and an indoor blower. In a case where at least one of the plurality of outdoor units performs heating operation and at least one of the plurality of outdoor units performs defrosting operation for removing frost adhering to the outdoor heat exchanger, the control unit changes the rotational speed of the compressor according to at least one of the suction pressure of the refrigerant sucked into the compressor of the outdoor unit that performs defrosting operation and the discharge pressure of the refrigerant discharged from the compressor.
This refrigeration cycle device has an indoor unit, a first outdoor unit, a second outdoor unit, and a control unit. The indoor unit has an indoor heat exchanger. The first outdoor unit and the second outdoor unit are connected in parallel with the indoor unit. The second outdoor unit has a compressor, an outdoor heat exchanger, and a four-way valve. The four-way valve switches between supplying the refrigerant discharged from the compressor to the indoor heat exchanger and the outdoor heat exchangers. The four-way valve has a main valve having a main valve body, and an auxiliary valve having an auxiliary valve body. The main valve body can move between a first position and a second position. In the first position, the refrigerant discharged from the compressor is supplied to one of the indoor heat exchanger and the outdoor heat exchangers. In the second position, the refrigerant discharged from the compressor is supplied to the other of the indoor heat exchanger and the outdoor heat exchangers. The auxiliary valve body is driven by a solenoid and can move between a third position and a fourth position. In the third position, the main valve body is arranged in the first position. In the fourth position, the main valve body is arranged in the second position. In the case that the first outdoor unit is operated and the second outdoor unit is stopped, if the main valve body is not in the first position, then, after the auxiliary valve body has been arranged in the fourth position, the control unit moves the auxiliary valve body to the third position.
In this invention, in the low-speed operation of an outdoor fan, a first flow control valve on the main outdoor heat exchanger side is throttled at or near the closed opening degree, and the opening degree of a second flow control valve is controlled so that the degree of supercooling of a refrigerant in an auxiliary outdoor heat exchanger remains constant at a target value.
F25B 6/02 - Compression machines, plants or systems, with several condenser circuits arranged in parallel
F24F 11/87 - Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
An embodiment of the present invention is provided with: a primary-side inverter 1 that is connected to three of six output terminals included in a motor 10 having an open winding structure in which three-phase windings are disposed independently of each other; and a secondary-side inverter 2 that is connected to the remaining three output terminals. A control device 12 controls a rotation speed of the motor 10 and a current which flows in the motor 10 by controlling the primary-side and secondary-side inverters 1, 2. DC power is supplied to the inverters 1 and 2, and the control device 12 performs PWM control of the inverters 1 and 2 by a switching pattern in which the numbers of phases for IGBTs 3 to turn ON become equal to each other. In one cycle of the electric angle of the motor 10 over a plurality of carrier cycles of the PWM control, a switching pattern is set such that only an upper IGBT 3 continues to be turned ON in one phase of a three-phase output, only a lower IGBT 3 continues to be turned OFF in another one phase, and ON, OFF phases of the upper, lower IGBTs 3 are reverse to each other in an alternate manner in the remaining one phase.
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
Provided is an outdoor unit for an air conditioner that makes it possible to achieve both an improvement in operability of a stop valve, and a smaller size. An outdoor unit (1) is provided with a valve fixing rack (41) provided to a base frame (21), and a plurality of stop valves (42) fixed to the valve fixing rack (41). A beam (46) of the valve fixing rack (41) comprises: a first notch part (65) which is opened upward and at which a first stop valve (71) is disposed, and a second notch part (66) which is opened downward and at which a second stop valve (72) is disposed. The heights of installation of the first stop valve (71) and the second stop valve (72) relative to an installation surface are different in the up/down direction.
The present invention makes it possible to dispose, inside a housing which accommodates a compressor, a heat exchanger, and the like which constitute a refrigeration cycle, the compressor, which is heavy, in the vicinity of a front section at which strength can be ensured. A compressor (12), an outdoor heat exchanger (13), and an electric component box (14) which constitute a refrigeration cycle are installed in a housing(11) of an outdoor unit (20), and this compressor cover (12) covers the compressor inside the housing and comprises a front panel (21) located on the front side of the compressor (12), wherein when viewed in a plan view, the front panel (21) has a portion overlapping the electric component box (14), which is disposed on a front upper section inside the housing (11) and is formed to be recessed in a depth direction A.
A motor drive device comprising switches that have a mechanical switching contact. The motor drive device connects the switching contacts of these switches, between the other ends of each phase winding of the motor. The current paths between the connections between each phase winding of the motor and the switching contacts have an impedance value that suppresses sudden changes in voltage at both ends of each upper switch element and each lower switch element in a second inverter and inhibits destruction of each upper switch element and each lower switch element.
H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
The outdoor unit of an air conditioner according to an embodiment comprises an electrical component box formed in a box shape, a waterproof cover for covering the electrical component box, and a refrigerant-cooling heat sink that is in contact with the back surface of the electrical component box. The refrigerant-cooling heat sink is attached to the inner surface of the waterproof cover. The electrical component box is attached at a prescribed position relative to the waterproof cover and is thereby positioned relative to the refrigerant-cooling heat sink.
The outdoor unit for an air conditioner according to an embodiment comprises an electrical component box, and a waterproof cover that covers the electrical component box. The waterproof cover is configured form a top plate that covers the upper surface of the electrical component box, a left-side plate that covers from the left-side surface of the electrical component box to part of the back surface thereof, and a right-side plate that covers from the right-side surface of the electrical component box to part of the back surface thereof. The waterproof cover is configured to enable separation and assembly thereof.
An outdoor unit for an air conditioner according to an embodiment of the present invention comprises an electrical component box and a refrigerant-cooling heat sink that cools the electrical component box. The electrical component box has a housing, common components that are common regardless of the capacity of the air conditioner, unique components that vary depending on the capacity of the air conditioner, and a sub-heat sink that is formed in the shape of a plate and in which the unique components are arranged. The sub-heat sink is formed with holes for mounting to the housing in common locations regardless of the capacity of the air conditioner, while holes for arranging the unique components are formed in unique locations depending on the capacity of the air conditioner and are changed according to the capacity of the air conditioner. The housing has an opening formed on one side, and when the sub-heat sink is mounted, the opening is closed and the unique components are located inside the electrical component box, so that the housing can be shared regardless of the capacity of the air conditioner.
Provided is an air conditioner having a cooling circuit that can appropriately cool an inverter circuit, which serves as a heating element, without overcooling, by branching some of refrigerant from a refrigeration circuit, and that has an extremely simple structure. An air conditioner (1) comprises: a refrigeration circuit (2) having a compressor (5), an outdoor heat exchanger (6), an expansion valve (7), an indoor heat exchanger (9), and a refrigerant pipe (11) that connects these devices and circulates refrigerant therethrough; an inverter circuit (31) that controls the drive of the compressor (5); a heat sink (32) that is thermally connected to the inverter circuit (31); and an inverter cooling circuit (33) that branches off from the refrigerant pipe (11) connecting the expansion valve (7) and the indoor heat exchanger (9), circulates some of the refrigerant to the heat sink (32), and then returns some of the refrigerant to the refrigerant pipe (11) connecting the expansion valve (7) and the indoor heat exchanger (9). The refrigerant flow before branching from the refrigeration circuit (2) to the inverter cooling circuit (33) and the refrigerant flow after branching from the refrigeration circuit (2) to the inverter cooling circuit (33) are connected in a substantially straight line.
The present invention makes it possible to make the amount of refrigerant in a refrigerant circuit during a warming operation more suitable and to satisfactorily ensure warming performance. An air conditioning apparatus (10) that has a control unit and is such that an outdoor unit (11), which is provided with a compressor (18), an outdoor heat exchanger (20), an accumulator (23), and a supercooling heat exchanger (24), and a plurality of indoor units (12) that are provided with indoor heat exchangers (40), are connected to each other by linking piping to constitute a refrigerant circuit (15), wherein: a bottom section of the accumulator (23) is connected to an intake side of the compressor (18) via return bypass piping (27) that is provided with an electromagnetic valve (28); the cooling source for the supercooling heat exchanger (24) is a supercooling bypass circuit (30) provided with a supercooling expansion valve (31); and when the amount of refrigerant within the refrigerant circuit (15) during a warming operation is determined to be excessively high, the control unit performs a control so as to fully close the electromagnetic valve (28) of the return bypass piping (27) and to gradually open the aperture of the supercooling expansion valve (31) of the supercooling bypass circuit (30) from a fully closed state.
The outdoor unit of an air conditioner according to an embodiment comprises a compressor for discharging a refrigerant to a channel, heat exchangers, expansion valves, a blower, an electrical component for driving and controlling the compressor and the blower, and a heat sink for cooling the electrical component using the refrigerant. In the heat exchangers, a plurality of heat exchangers are connected in parallel, and the heat exchangers include a heat exchanger of a first group configured from at least one of the plurality of heat exchangers, and a heat exchanger of a second group configured from at least one heat exchanger that does not belong to the first group. The expansion vales include a first expansion valve for adjusting the supercooling degree of the heat exchanger of the first group and a second expansion valve for adjusting the supercooling degree of the heat exchanger of the second group. The heat sink is positioned, in the channel for the refrigerant, upstream of a merging part at which the refrigerants condensed by the heat exchangers of the first group and the second group merge, and downstream of the second expansion valve.
Provided is a hot water generation device with which it is possible to perform efficient operation or an operation that maintains user comfort in accordance with the conditions by using a single pump. This hot water generation device (1) can execute: an air conditioning operation in which a switching valve (45) is switched such that water subjected to heat exchange by a water heat exchanger (11) is circulated to a water circuit (41) for air conditioning; a hot water supply heating operation in which the switching valve (45) is switched such that water subjected to heat exchange by the water heat exchanger (11) is circulated to a water circuit (42) for hot water supply heating; and control of a mixed operation mode for alternately repeating the air conditioning operation continuing for a first period of time, and the hot water supply heating operation continuing for a second period of time. Furthermore, the hot water generation device (1) changes the second period of time on the basis of a load state of the water circuit (41) for air conditioning in the mixed operation mode.
This motor drive device drives a motor having a plurality of phase windings in a state of not being in contact with each other, and therefore comprises first and second invertors. The first and second invertors are first and second modules that are configured in the same way and are each obtained by accommodating, in one package, a switching circuit having a positive side terminal and a negative side terminal, and a drive circuit for driving the switching circuit, and each of the negative side terminals are disposed on a circuit board while in proximity to each other.
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
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
A motor drive device comprising a first inverter, a second inverter, and a controller. This controller: rotates the motor rotor, when the motor starts, to an initial position by using DC magnetic excitation that supplies DC magnetic excitation current to each phase winding of the motor, from the first and second inverters; and, after this rotation, PWM-controls the switching of the first and second inverters such that the rotation speed of the rotor reaches a target speed. The controller performs DC magnetic excitation whereby the zero-axis current is almost zero.
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
Provided is an outdoor unit for an air conditioner, equipped with a motor base having sufficient rigidity to support the weight of a blower, which is a rotary machine, and the vibrations caused by the rotation, without interfering with the flow of air caused by the drive of the blower. An outdoor unit (1) comprises: a frame (15) that has a front beam (23F) and a rear beam (23R) extending in parallel; a motor base (3) that spans between the front beam (23F) and the rear beam (23R); an electric motor (31) that is supported by the motor base (3); and an impeller (32) that is rotationally driven by the electric motor (31). The motor base (3) is equipped with: a pair of first girders (41) that span between the front beam (23F) and the rear beam (23R); a pair of second girders (42) that span between the pair of first girders (41) and are integrally connected to the pair of first girders (41); and a support frame (43) that is disposed on each of the second girders(42), extends in the longitudinal direction of the second girders (42), and protrudes in the normal direction of a virtual plane passing through the pair of first girders (41) and the pair of second girders 42 to support the electric motor (31).
NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY (Japan)
KYOTO UNIVERSITY (Japan)
Inventor
Hirayama Takuya
Hattori Hitoshi
Nakano Ken
Tsujii Yoshinobu
Abstract
Provided is a compressor in which friction loss between sliding surfaces that slide against each other can be effectively and stably mitigated over the long term, and a refrigeration cycle device utilizing said compressor. A refrigeration cycle device according to one embodiment of the present invention comprises a compressor, a radiator connected to the compressor, an expanding device connected to the radiator, and an evaporator connected to the expanding device, said compressor having a compressor mechanism that sucks in and ejects a working fluid. Of a first sliding surface and a second sliding surface of the compressor mechanism which slide against each other, a polymer brush is provided to the second sliding surface, which has a smaller surface area than the first sliding surface.
According to one embodiment, this heat pump water heater comprises a compressor, a water heat exchanger, a tank, a water radiator, a pump, a heater, a first temperature sensor, a second temperature sensor, and a control unit. The first temperature sensor detects the first temperature of water from which heat dissipates into the water stored in the tank and which flows into the flow path of the water heat exchanger. The second temperature sensor detects the second temperature of the water stored in the tank. The control unit controls the running or stopping of the compressor on the basis of the first temperature and the second temperature, and also controls the rotational speed of the compressor on the basis of the first temperature when the compressor is run.
Provided is a hot water generating device such that it is possible to efficiently accommodate a cylindrical expansion tank within a rectangular housing. This hot water generating device (1) comprises: a rectangular housing (51) that has a front surface (51f), a rear surface (51r), a top surface (51t), a bottom surface (51b), and a pair of side surfaces (51s); and an expansion tank (31) that is cylindrical in shape, that has a length dimension L in the direction of a central axis C which is greater than the diameter dimension D, and that is accommodated in the housing (51) such that the central axis (C) is oriented in the direction of the pair of side surfaces (51s) of the housing (51).
Provided is a hot water generation device which can connect hot water supplying crossover piping extending to a hot water supply place, without loosening of a screw-in type pipe joint of a circulation pump or causing water leakage following the loosening of the screw-in-type pipe joint of the circulation pump. This hot water generation device (1) comprises: a housing (51) having a joint insertion hole (77); a pump (36) having a pump inlet pipe joint (72) and a pump outlet pipe joint (73); and a hot water supply pipe connection joint (48) which is fixed to the pump outlet pipe joint (73) and protrudes to outside of the housing (51) via the joint insertion hole (77), and which can connect, outside of the housing (51), hot water piping (47) that sends hot water to the hot water supply place.
This indoor unit for an air conditioner according to an embodiment comprises a heat exchanger, a control unit, a housing, an air outlet unit, and a fan. The control unit includes a first terminal block to which a power line is connected and a second terminal block to which a communication line is connected. The housing houses the heat exchanger and the control unit, and includes a front plate that faces the heat exchanger and a front cover that faces the control unit and is detachable from the front plate. The air outlet unit is attached to the front plate and has an air outlet. The fan generates an airflow that passes through the heat exchanger and is blown out from the air outlet. A portion of the control unit overlaps with the air outlet unit in the axial direction of the air outlet. The first terminal block and the second terminal block overlap with the front cover in the axial direction and do not overlap with the air outlet unit and the front plate.
This indoor unit for an air conditioner according to an embodiment comprises a heat exchanger, a housing, a fan, a cylindrical member, and a wind direction plate. The housing houses the heat exchanger and has an opening facing the heat exchanger. The fan generates an airflow of air heat-exchanged by the heat exchanger. The wind direction plate adjusts the inclination of the airflow blown out from an air outlet. The cylindrical member has an air outlet for blowing the airflow into an indoor space, constitutes a wind path through which the airflow passes continuously from the opening side to the air outlet side, and has a pair of throttle portions that narrow the cross-sectional area of the wind path on the air outlet side from both sides in the direction in which the wind path is traversed compared to the cross-sectional area of the wind path on the opening side.
This wiring protection structure in an indoor unit of an air conditioner according to one embodiment comprises a protective member that protects a wire connecting a rotary mechanism that rotates about a predetermined central axis and a non-rotating mechanism that does not shift with respect to the rotary mechanism, and that allows the wire to pass inside. The protective member is provided with a wiring portion and a folding-back portion. The wiring portion defines a wiring space for the wire, which is set to a diameter dimension larger than that of the wire. The folding-back portion folds the wiring portion in such a manner that the folded position of the wiring portion can be displaced in the rotation direction of the rotary mechanism.
A system controller (40) that serves as a central management device of an air-conditioning system (1) to which a remote controller (30) is connected comprises a central built-in clock (41), a time correction timing-setting unit (43), and a time correction-processing unit (44). The remote controller (30) has a remote controller built-in clock (33), and has a timer function based on time measurement performed by the remote controller built-in clock. In the time correction timing-setting unit (43), time correction timing information indicating a time that has a value other than "0" or "5" at the ones digit in the unit of minutes, is set as a timing at which a time correction process is performed on the built-in clock (33). Upon determining that the time of the central built-in clock has reached the time indicated by the time correction timing information, the time correction-processing unit (44) transmits, to the remote controller (30), a correction instruction to correct the measured time of the remote controller built-in clock to the time of the central built-in clock.
F24F 11/61 - Control or safety arrangements characterised by user interfaces or communication using timers
H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
An indoor unit according to one embodiment of the present invention comprises: an air outlet; a fan; and a divided wind direction plate. The fan generates an airflow that passes through the air outlet. The divided wind direction plate: includes a main deflector section and an auxiliary deflector section located upstream of the airflow from the main deflector section; and is supported at the air outlet so as to be adjustable in inclination relative to the airflow. Furthermore, the positions of the main deflector section and the auxiliary deflector section are offset from each other in the thickness direction of the main deflector section, and a gap is formed between the main deflector section and the auxiliary deflector section.
F24F 13/15 - Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built-up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae
The rotary compressor of the present embodiment has a rotating shaft, an electric motor, a compression mechanism, a balancer, and a balancer cover. The compression mechanism has a cylinder, a main bearing, and a layshaft. The balancer is provided to the rotating shaft on an axial-direction second side of an auxiliary bearing. The balancer cover covers the balancer. A supply path for lubricating oil is formed in the rotating shaft, the supply path opening in the end surface on the axial-direction second side. In a position facing the supply path along the axial direction in the balancer cover, a supply hole that allows communication between the supply path and the exterior of the balancer cover is formed. Between the balancer cover and the rotating shaft is provided a seal mechanism that seals the space between the balancer cover and the rotating shaft in a state allowing relative axial movement of the balancer cover and the rotating shaft.
A compressor (2) comprising: a sealed container (11); a compression mechanism (13) that is housed in the sealed container (11); an electric motor (12) having a cylindrical stator (31) fixed to an inner surface of the sealed container (11), and a rotor (32) that is disposed in the stator (31) and that rotationally drives the compression mechanism (13); and a pair of sealed terminals (18), (19) that are provided side by side to the sealed container (11). Each of the sealed terminals (18), (19) has three first plate-shaped terminals (75) that are arranged to form a triangle D by being disposed at the respective sides of the triangle D, and that have respective ventral surfaces (75f) facing each other. One corner Co of a triangle D1 formed by the three first plate-shaped terminals (75) of one of the pair of sealing terminals (18), (19) faces one corner Co of a triangle D2 formed by the three first plate-shaped terminals (75) of the other of the pair of sealing terminals (18), (19).
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
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
A motor drive device, according to the present invention, selectively sets an open winding mode in which other ends of each phase winding in a motor are disconnected by opening a switch and a first and second inverter are linked together and switched between, and a star connection mode in which the other ends of each phase winding are connected to each other by closing the switch to each other and which switches to the first inverter. If the motor stops abnormally when the open winding mode is set, the motor drive device sets the star connection mode instead of the open winding mode and restarts the motor.
H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
90.
MOTOR DRIVING DEVICE AND REFRIGERATION CYCLE DEVICE
In accordance with the value of current flowing through a motor, this motor driving device switches between an open winding mode, in which the open state of open contacts of mechanical relays brings the other ends of phase windings of the motor into a non-connected state and switches first and second inverters in coordination with each other, and a star-connection mode, in which the closing of the open contacts of the relays connects the other ends of the phase windings to each other and switches the first inverter.
H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
91.
AIR-CONDITIONING SYSTEM MANAGEMENT DEVICE AND AIR-CONDITIONING SYSTEM MANAGEMENT METHOD
An air-conditioning system management device according to an embodiment, in which a plurality of outdoor units that are connected to a plurality of indoor units via lower-level communication networks are connected via a higher-level communication network, comprises a higher-level communication state information calculation unit, a lower-level communication state information acquisition unit, a communication quality information calculation unit, a display information generation unit, and a display unit. The higher-level communication state information calculation unit calculates the communication state information of the higher-level communication network. The lower-level communication state information acquisition unit acquires the communication state information of the plurality of lower-level communication networks via the outdoor units connected to the lower-level communication networks. The communication quality information calculation unit calculates communication quality information for each of the communication networks at predetermined time intervals. The display information generation unit generates display information for displaying the calculated communication quality information for each of the communication networks on the same screen. The display unit displays the generated display information.
F24F 11/54 - Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
F24F 11/30 - Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
This refrigeration cycle device is provided with: a refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator are connected and through which a refrigerant is circulated; a motor that has a plurality of phase winding wires not being connected to each other and that drives the compressor; a first inverter that controls energization to respective ends of the phase winding wires; a second inverter that controls energization to the other ends of the phase winding wires; a switch that is connected between the other ends of the phase winding wires; and a motor controller that performs setting in a selective manner between an open winding wire mode in which switching is performed by putting the other ends of the phase winding wires into a non-connection state through opening of the switch and by linking the first and second inverters to each other and a star wire connection mode in which the first inverter is switched by making interconnection between the other ends of the phase winding wires through closing of the switch. The motor controller sets the open winding wire mode when the motor is activated.
The rotary compressor according to an embodiment has a shaft, a plurality of compression mechanisms, a plurality of eccentric parts, a first balancer, and a second balancer. The plurality of eccentric parts have a first eccentric part, a second eccentric part, and a third eccentric part, which are aligned from one side to another side along the direction of the center axis of the shaft. The second balancer is positioned on the other side relative to the first balancer. The angle between the eccentricity direction of the first balancer relative to the center axis of the shaft and the eccentricity direction of the plurality of eccentric parts relative to the center axis of the shaft increases in the order of the third eccentric part, the second eccentric part, and the first eccentric part. The angle between the eccentricity direction of the second balancer relative to the center axis of the shaft and the eccentricity direction of the plurality of eccentric parts relative to the center axis of the shaft increases in the order of the first eccentric part, the second eccentric part, and the third eccentric part.
F04C 18/356 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
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
94.
EQUIPMENT MANAGEMENT DEVICE AND METHOD FOR GENERATING EQUIPMENT MANAGEMENT SCREEN
A controller (20) that displays an air conditioner management screen in which air conditioner icons (101) in a first display size, which indicate air conditioners, are superimposed in positions on a floor block diagram of a building corresponding to the installation location of each of a plurality of air conditioners (10), comprises a display information generation unit (23) that, when an operation is performed instructing display relating to a group to which a prescribed air conditioner belongs: specifies all of the air conditioners belonging to the group; changes the air conditioner icon corresponding to the specified air conditioner to a second display size that is larger than the first display size; displays an operation button (102) for operating the settings of each of the air conditioners, the operation button (102) overlapping in a prescribed position of the air conditioner management screen; and changes the air conditioner icons (101) corresponding to air conditioners that do not belong to the group to a third display size that is smaller than the first display size.
H04M 11/00 - Telephonic communication systems specially adapted for combination with other electrical systems
H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
F24F 11/52 - Indication arrangements, e.g. displays
95.
STATE EVALUATION SYSTEM, STATE EVALUATION DEVICE, AND STATE EVALUATION METHOD
A state evaluation system according to an embodiment has a sensor, a filter, a signal processing unit, and an evaluation unit. The sensor detects elastic waves generated from an industrial machine during operation thereof. The filter is capable of transmitting elastic waves that have frequency characteristics originating from wear produced inside the industrial machine. The signal processing unit detects a plurality of feature quantities using the elastic waves that have passed through the filter. The evaluation unit evaluates an abnormality in the industrial machine on the basis of a combination of the extracted plurality of feature quantities.
G01H 11/08 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
G01M 99/00 - Subject matter not provided for in other groups of this subclass
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
96.
COMMUNICATION SYSTEM, MASTER DEVICE USED IN COMMUNICATION SYSTEM, SLAVE DEVICE, AND COMMUNICATION METHOD
A communication system (1) connects, via a communication line, a master device (10) and a plurality of slave devices (20), including a slave device with a termination resistance set therein, wherein the master device includes a master communication control unit (122) that: sets the communication speed for communication with the plurality of slave devices to a high-speed baud rate in normal times; switches to a low-speed baud rate upon detection of an inability to communicate with the slave device with the termination resistance set therein; and if a recovery is detected for communication with the slave device with the termination resistance set therein, transmits, to the plurality of slave devices, an instruction to switch to the high-speed baud rate, and switches the host device to the high-speed baud rate. The plurality of slave devices each include a slave communication control unit (214) that: sets the communication speed for communication with the master device to a high-speed baud rate in normal times; switches to a low-speed baud rate upon detection of an inability to communicate with the master device; and switches to the high-speed baud rate upon receipt, from the master device, of an instruction to switch to the high-speed baud rate.
A heat exchanger according to this embodiment has heat exchange tubes and headers. Refrigerant passages through which a refrigerant flows are formed in the heat exchange tubes. The headers are respectively provided to one and the other end sections of the heat exchange tubes. The headers each comprise a pair of plate bodies that are layered such that first main surfaces thereof are facing. A recessed section forming a space passage that is in communication with the refrigerant passages is formed in the first main surface of at least one of the plate bodies.
F28D 1/047 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or mo with the heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
A heat exchanger according to an embodiment has a plurality of heat exchange tubes and headers. The plurality of heat exchange tubes each have formed therein a refrigerant flow passage through which a refrigerant flows. The headers are provided at end sections of the heat exchange tubes. The plurality of heat exchange tubes each include first and second upstream-side heat exchange tubes disposed in said order side by side in a first direction, and first and second downstream-side heat exchange tubes disposed in said order side by side in the first direction. At least one of the headers comprises an inner plate body to which the heat exchange tubes are connected, an outer plate body disposed facing the inner plate body, and intermediate plate bodies provided between the inner plate body and the outer plate body. A first transition flow passage and a second transition flow passage are formed in the intermediate plate bodies. The first transition flow passage allows the refrigerant flow passage of the first downstream-side heat exchange tube to communicate with the refrigerant flow passage of the second upstream-side heat exchange tube. The second transition flow passage allows the refrigerant flow passage of the second downstream-side heat exchange tube to communicate with the refrigerant flow passage of the first upstream-side heat exchange tube.
This motor driving device is for a motor having a plurality of phase windings which are in a non-connected state with respect to each other, and is provided with: a first inverter which controls power distribution to one ends of the phase windings; a second inverter which controls power distribution to the other ends of the phase windings; switches which are connected between the other ends of the phase windings; a current detection unit which detects an electric current flowing to the motor; and a motor controller which performs control on the opening/closing of the switches and on the switching between the first and second inverters. The motor controller prohibits the opening/closing of the switches in the case where the fluctuation range per unit time of the electric current detected by the current detection unit is equal to or greater than a threshold.
H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
This indoor unit for an air conditioner comprises: a heat exchanger; a blower device that blows out air temperature-adjusted by the heat exchanger; a housing that houses the heat exchanger and the blower device; and a louver that pivots and deflects the direction of air that is blown toward the interior of a room from the blower device. The housing has a flat first surface, a flat second surface that stands substantially perpendicular to the first surface, and a flat third surface that is interposed between the first surface and the second surface at an angle to both surfaces. The louver is disposed flush with the first surface and the third surface in the state before pivoting.