Provided is a hot water generation device with which it is possible to perform an efficient operation or an operation that maintains user comfort, in accordance with conditions, without using a plurality of pumps. This hot water supply tank (12) comprises: a tank (51) in which supply water can be retained; a water supply pipe (53) having an outlet (52) disposed at a bottom section within the tank (51), the water supply pipe (53) channeling the supply water into the tank (51); a coil (55) provided within the tank (51), the coil (55) distributing circulation water for heating the supply water within the tank (51); a hot water supply pipe (56) that guides hot water, which is the supply water after heating within the tank (51), to outside of the tank (51); and a heat-insulating member (58) disposed higher than the vicinity of the height of the outlet (52) of the water supply pipe (53) or the vicinity of the height of a lower end (55d) of the coil (55), the heat-insulating member (58) covering the outer surface of the tank (51).
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
4.
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.
An air conditioning system of the embodiment includes a first indoor unit and a second indoor unit. The first indoor unit controls a temperature of the inside of a space by controlling blowing of warm air from an upper part of the space to the inside of the space. The second indoor unit controls blowing of warm air from under a floor of the space to the inside of the space on the basis of a temperature in a lower part of the space.
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.
A communication system includes a master unit; and a plurality of slave units including a slave unit to which a termination resistance is set, the plurality of slave units connected to the master unit via a communication line. In the communication system, the master unit includes a master communication control unit that normally sets a communication rate of communication performed with the plurality of slave units to a high baud rate, switches the high baud rate to a low baud rate after detecting that communication with the slave unit to which the termination resistance is set is disabled, transmits an instruction for switching the low baud rate to the high baud rate to the plurality of slave units after detecting that the communication with the slave unit to which the termination resistance is set is restored, and switches setting of the master unit itself to the high baud rate.
According to one embodiment, the air conditioner comprises an outdoor unit, an indoor unit, a refrigerant cutoff unit, an airtight state detection unit, a notification unit, and a control unit. The control unit determines a refrigerant cutoff condition for whether or not to urge a flow of the refrigerant flowing into and from the indoor unit to be cut off and, if the refrigerant cutoff condition is satisfied, urges the refrigerant cutoff unit to cut off the flow, and urges the notification unit to notify a detection result of an airtight state of a pipe detected by the airtight state detection unit, in the indoor unit in which the flow of the refrigerant is cut off.
F24F 11/84 - 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 using valves
According to one embodiment, a refrigeration cycle apparatus includes a main flow channel of a refrigerant, a compressor, a condenser, an evaporator, a branch channel, an expansion valve, a supercooling heat exchanger, an injection flow channel, and a control unit. The control unit determines, based on whether the determination condition is satisfied or not, a determination condition for adjusting an opening degree of the expansion valve and adjusts the opening degree of the expansion valve according to a first target value for a discharge temperature of the refrigerant from the compressor, or a second target value for a superheat degree of the refrigerant flowing through the injection flow channel.
According to one embodiment, an information management system that autonomously controls a manufacturing process and equipment by diversifying a feedback loop in a CPS is provided. The embodiment is applied to an information management system that autonomously controls a manufacturing process and a service. A loop connection section connects a feedback loop of the cyber-physical system. An information acquisition section acquires specific information necessary for the manufacturing process and the service from the feedback loop. An information analytics section analyzes the specific information. An autonomous operation control section autonomously performs the operation control based on an analytics result from the information analytics section.
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 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
To achieve both improving operability of stop valves and downsizing an outdoor unit, the outdoor unit for an air-conditioner includes a valve fixing frame provided on the base frame, and a plurality of stop valves fixed to the valve fixing frame. A beam of the valve fixing frame includes a first notch opened upward, in which a first stop valve is disposed therein, and a second notch opened downward, in which a second stop valve is disposed therein. The first stop valve and the second stop valve are different in installation height in a vertical direction with reference to the installation surface.
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.
An air conditioner that has a controller and is such that an outdoor unit, which is provided with a compressor, an outdoor heat exchanger, an accumulator, and a supercooling heat exchanger, and indoor units provided with indoor heat exchangers, are connected to each other by connecting piping to constitute a refrigerant circuit. The bottom of the accumulator is connected to an intake side of the compressor via return bypass piping that is provided with an electromagnetic valve. The cooling source for the supercooling heat exchanger is a supercooling bypass circuit provided with a supercooling expansion valve; and when the amount of refrigerant during heating operation is determined to be excessive, the controller performs a control so as to fully close the electromagnetic valve of the return bypass piping and to gradually increase the opening degree of the supercooling expansion valve of the supercooling bypass circuit from a fully closed state.
F24F 11/84 - 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 using valves
F24F 1/0059 - Indoor units, e.g. fan coil units characterised by heat exchangers
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
An outdoor unit of an air conditioner includes: an electrical component box formed into a box shape; a waterproof cover that covers the electrical component box; and a refrigerant cooling heat sink that comes into contact with a back surface of the electrical component box. The refrigerant cooling heat sink is attached to an inner surface of the waterproof cover, and a relative position of the electrical component box with respect to the refrigerant cooling heat sink is set by the electrical component box being attached to a predetermined position of the waterproof cover.
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).
According to one embodiment, an air conditioner with two or more outdoor units and one or more indoor units, which are connected to a single refrigerant pipe in parallel, the air conditioner comprising a controller configured to determine, based on driving performance of the two or more outdoor units, a driving priority order of the two or more outdoor units. The controller switches the driving priority order of the two or more outdoor units between a descending order of the driving performance of the outdoor units and an ascending order of the driving performance of the outdoor units at certain 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
According to one embodiment, an air conditioner includes an outdoor unit including a control unit which controls an operation of a compressor, an expansion valve kit, at least one air-handling unit, and a controller. The control unit or the controller adjusts, when a parameter value indicating a change in temperature of air blown out of an indoor fan or a parameter value indicating a change in temperature of air sucked by the indoor fan is not within a range defined by a first threshold and a second threshold smaller than the first threshold, each of an opening degree of an indoor expansion valve and a change period of the opening degree or each of an operation frequency of the compressor and a change period of the operation frequency.
According to one embodiment, an air conditioner includes an indoor unit, an outdoor unit, and a controller. The controller includes a first defrost module and a second defrost module. The first defrost module is configured to defrost a first outdoor heat exchanger and a second outdoor heat exchanger at the same time. The second defrost module is configured to start defrosting of the second outdoor heat exchanger in advance, and to perform defrosting of the first outdoor heat exchanger after the start of defrosting of the second outdoor heat exchanger.
According to one embodiment, in a low speed drive of outdoor fans, a first flow rate adjusting valve in a main outdoor heat exchanger side is narrowed to a closing degree or a close range thereof, and an opening degree of a second flow rate adjusting valve is controlled such that a supercooling degree of refrigerant in auxiliary outdoor heat exchangers becomes constantly a target value.
F24F 11/84 - 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 using valves
A refrigeration cycle device of the embodiment includes an indoor unit, a first outdoor unit and a second outdoor unit, and a control unit. The second outdoor unit includes a four-way valve. The four-way valve includes a main valve having a main valve body and a sub-valve having a sub-valve body. The main valve body is movable between a first position and a second position. The sub-valve body is driven by a solenoid and is movable between a third position and a fourth position. In case in which the first outdoor unit is operated and the second outdoor unit is stopped, when the main valve body is not at the first position, the control unit disposes the sub-valve body at the fourth position and then moves the sub-valve body to the third position.
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).
According to one embodiment, a motor drive apparatus is an apparatus which drives a motor including a plurality of phase windings in a mutually unconnected state, and includes first and second inverters. The first and second inverters are first and second modules each of which is configured in such a manner that a switching circuit including a positive side terminal and negative side terminals and a drive circuit intended to drive the switching circuit are accommodated in one package, and which possess configurations identical to each other, and the first and second modules are arranged on a circuit board in a state where the negative side terminals of the modules are respectively close to each other.
H02P 25/22 - Multiple windings; Windings for more than three phases
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
According to one embodiment, this outdoor unit of an air conditioner includes a compressor, a heat exchanger, an expansion valve, a blower fan, electrical components, and a heat sink. The heat exchanger includes a first group constituted of at least one of the plurality of heat exchangers and a second group constituted of at least one of the plurality of heat exchangers not belonging to the first group. The expansion valve includes a first expansion valve and a second expansion valve. The heat sink is arranged on the flow path of the refrigerant on the upstream side of a confluence position of the refrigerant branches condensed by the heat exchangers of the first group and the second group and on the downstream side of the second expansion valve.
A primary-side inverter is connected to three output terminals of six output terminals included in a motor with an open winding structure including windings of three independent phases and a secondary-side inverter is connected to the remaining three output terminals. Direct current power is supplied to the inverters, and a control device performs PWM control on the inverters by using a switching pattern in which the numbers of phases where each is turned on are equal, and in the switching pattern, ON of only an upper is continued in one phase from among the three phase outputs, OFF of only a lower is continued in another phase, and the upper and lower are alternately turned on and off such that mutual phases are opposite in the remaining one phase in one cycle of an electric angle of the motor over a plural carrier cycles in PWM control.
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
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.
According to one embodiment, a motor drive apparatus includes a first inverter, a second inverter, and a controller. This controller rotationally moves, at the time of startup of a motor, a rotor of the motor to an initial position by DC excitation of supplying DC exciting currents from the first and second inverters to the phase windings of the motor and, after this rotational movement, PWM-controls switching of the first and second inverters in such a manner that a rotational speed of the rotor becomes a target rotational speed. Then, the controller carries out the DC excitation fey which a zero-axis current in each of the phase windings becomes approximately 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
H02M 7/5395 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
H02P 7/06 - Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
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.
According to one embodiment, a generation device acquires a plurality of images of a temperature distribution of a conveyance object. The images are generated by a thermal camera. The generation device sets a plurality of measurement areas in each of the images along a conveyance direction of the conveyance object. The generation device generates time-series data of temperature change over time for each of the plurality of measurement areas. The generation device generates a temperature profile of temperature change over time of the conveyance object by using a portion of temperatures extracted from the time-series data of the plurality of measurement areas.
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
56.
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.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Remote control telemetering machines and instruments;
telecommunication machines and apparatus; personal digital
assistants; computer software for air conditioners; computer
communications software for air conditioners; computer
software for remote monitoring and analysis for air
conditioners; computer software for freezing machines and
apparatus; computer communications software for freezing
machines and apparatus; computer software for remote
monitoring and analysis for freezing machines and apparatus;
computer software; computer programs; electronic control
apparatus; electronic navigating apparatus; electronic
monitoring apparatus, other than for medical purposes;
computers and their peripherals; computer programs. Electric boilers, other than parts of prime movers, engines;
air conditioning apparatus for industrial purposes; freezing
machines and apparatus for industrial purposes; air
conditioning apparatus; air conditioners; heat pumps;
freezing machines and apparatus; ventilation installations
and apparatus; air-conditioning installations and apparatus.
A motor control device of an embodiment includes a power supply unit that supplies AC power to a motor; a current detection unit that detects a current flowing through a winding of the motor; a speed and electric angle estimation unit that estimates a rotation speed and an electric angle of the motor based on a voltage outputted by the power supply unit and the current; a coordinate conversion unit that obtains an excitation current and a torque current based on the current and the electric angle; a torque current command determination unit that substitutes a predicted torque calculated based on a mechanical motion equation into a torque component current command value calculated based on a torque expression of a vector control coordinate, to generate a torque component current command value for bringing a difference between an inputted speed command and an estimated speed closer to zero; and a model prediction control unit that applies, to a plurality of predicted currents including a current change ratio determined depending on each of a plurality of switching patterns based on a space voltage vector that are able to be outputted by the power supply unit, an evaluation function to evaluate a size of a difference from a predicted current corresponding to each of the torque component current command value and an excitation component current command value inputted from outside, and that selects and outputs a switching pattern.
According to one embodiment, a motor drive unit includes a motor including a plurality of phase windings in a mutually unconnected state, a first inverter which controls application of electric power to one ends of the phase windings, a second inverter which controls application of electric power to the other ends of the phase windings, relays each of which includes a make break contact connected between the other ends of the phase windings, and a controller which switches, according to a value of a current flowing through the motor, between an open-windings mode and a star-connection mode.
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
F25D 21/00 - Defrosting; Preventing frosting; Removing condensed or defrost water
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
60.
REFRIGERATION CYCLE DEVICE AND LEAK INSPECTION METHOD FOR REFRIGERANT PIPE OF REFRIGERATION CYCLE DEVICE
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.
According to one embodiment, a refrigeration cycle apparatus includes a motor which including a plurality of phase windings in a mutually unconnected state, a first inverter which controls application of electric power to one ends of the phase windings, a second inverter which controls application of electric power to the other ends of the phase windings, switches connected between the other ends of the phase windings, and a motor controller which selectively sets one of an open-windings mode and a star-connection mode. The motor controller sets, at the time of startup of the motor, the open-windings mode.
A rotary compressor of an 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 sub-bearing. The balancer is provided on the rotating shaft on a second side of the sub-bearing in an axial direction thereof. The balancer cover covers the balancer. A lubricating oil supply path that opens on a second side end face in the axial direction is provided in the rotating shaft. A supply hole that allows the supply path to communicate with the outside of the balancer cover is formed in the balancer cover at a position facing the supply path in the axial direction. A seal mechanism that seals between the balancer cover and the rotating shaft is provided between the balancer cover and the rotating shaft while allowing relative movement between the balancer cover and the rotating shaft in the axial direction.
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
64.
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 display displays an equipment management screen in which icons indicating equipment devices and having a first display size are superimposed on a floor configuration diagram of a building at positions corresponding to installation sites of the equipment devices. A display information generator, upon detection of an operation of specifying display of a group to which the equipment device corresponding to the operated icon belongs, identifies all equipment devices belonging to the specified group, changes display sizes of icons corresponding to the identified equipment devices to a second display size larger than the first display size, displays operation buttons for implementing settings of the identified equipment devices at prescribed positions on the equipment management screen in a superimposed manner, and changes display sizes of icons corresponding to equipment devices not belonging to the specified group to a third display size smaller than the first display size.
G06F 3/04817 - Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance using icons
G06F 3/0482 - Interaction with lists of selectable items, e.g. menus
G06F 3/04847 - Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
G06T 3/40 - Scaling of a whole image or part thereof
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 rotary compressor according to an embodiment includes a plurality of eccentric parts, a first balancer, and a second balancer. The plurality of eccentric parts include a first eccentric part, a second eccentric part, and a third eccentric part disposed to be aligned from one side to the other side. The second balancer is disposed on the other side of the first balancer. Angles between a direction of eccentricity of the first balancer and directions of eccentricity of the plurality of eccentric parts are configured to increase in an order of the third eccentric part, the second eccentric part, and the first eccentric part. Angles between a direction of eccentricity of the second balancer and directions of eccentricity of the plurality of eccentric parts are configured to increase in an order of the first eccentric part, the second eccentric part, and the third eccentric part.
F25B 31/02 - Compressor arrangements of motor-compressor units
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 one embodiment, a compressor includes cylinders, a rotating shaft, bearings, and discharge valve mechanisms. Each of the discharge valve mechanisms includes a discharge valve and a valve presser. Regarding the valve pressers, each of the valve pressers includes a main body part lengthwise along the longitudinal direction of the discharge valve, and at least one of the valve pressers includes a fixed part extending in a direction intersecting the longitudinal direction of the discharge valve relatively to the main body part and fixed to the bearing.
F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
F04C 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 18/324 - 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 both the movement defined in group and relative reciprocation between the co-operating members with vanes hinged to the inner member and reciprocating with respect to the outer member
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.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
(1) Remote control telemetering machines and instruments; telecommunication machines and apparatus; personal digital assistants; computer software for maintenance and inspection for air conditioners; computer communications software for maintenance and inspection, remote monitoring and analysis for air conditioners; computer software for remote monitoring and analysis for air conditioners; computer software for maintenance and inspection for freezing machines and apparatus; computer communications software for maintenance and inspection, remote monitoring and analysis for freezing machines and apparatus; computer software for remote monitoring and analysis for freezing machines and apparatus; computer software; computer programs; electronic control apparatus; electronic navigating apparatus; electronic monitoring apparatus, other than for medical purposes; computers and their peripherals; computer programs.
(2) Electric boilers, other than parts of prime movers, engines; air conditioning apparatus for industrial purposes; freezing machines and apparatus for industrial purposes; air conditioning apparatus; air conditioners; heat pumps; freezing machines and apparatus, namely, refrigerating machines, refrigerating or freezing showcases; ventilation installations and apparatus; air-conditioning installations and apparatus.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Remote control telemetering machines and instruments; telecommunication machines and apparatus in the nature of air conditioning controllers incorporating telecommunications transmitters, cables and antennas for remote monitoring; personal digital assistants; downloadable computer software for maintenance and inspection for air conditioners; recorded computer software for maintenance and inspection for air conditioners; downloadable computer communications software for maintenance and inspection, remote monitoring and analysis for air conditioners; recorded computer communications software for maintenance and inspection, remote monitoring and analysis for air conditioners; downloadable computer software for remote monitoring and analysis for air conditioners; recorded computer software for remote monitoring and analysis for air conditioners; downloadable computer software for maintenance and inspection for freezing machines and apparatus; recorded computer software for maintenance and inspection for freezing machines and apparatus; downloadable computer communications software for maintenance and inspection, remote monitoring and analysis for freezing machines and apparatus; recorded computer communications software for maintenance and inspection, remote monitoring and analysis for freezing machines and apparatus; downloadable computer software for remote monitoring and analysis for freezing machines and apparatus; recorded computer software for remote monitoring and analysis for freezing machines and apparatus; downloadable computer programs for maintenance and inspection, remote monitoring and analysis for air conditioners; recorded computer programs for maintenance and inspection, remote monitoring and analysis for air conditioners; downloadable computer programs for maintenance and inspection, remote monitoring and analysis for freezing machines and apparatus; recorded computer programs for maintenance and inspection, remote monitoring and analysis for freezing machines and apparatus; electronic control apparatus for air conditioning apparatus; electronic monitoring apparatus for air conditioning apparatus, other than for medical purposes; computers and their peripherals Electric boilers; air conditioning apparatus for industrial purposes; freezing machines and apparatus for industrial purposes; air conditioning apparatus; air conditioners; heat pumps; freezing machines and apparatus, namely, refrigerating machines, refrigerating or freezing showcases; ventilation installations and apparatus, namely, heat recovery ventilators; air-conditioning installations and apparatus
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).
Air conditioning apparatus; heat pumps, not for freezing machines and apparatus; air conditioners for industrial purposes; air conditioning installations; boilers, other than parts of machines, namely, electric boilers, heating boilers, furnace boilers, boilers for heating installation, and boilers operated by heat pump
(1) Air conditioners; air-conditioning units; boilers for heating installations; central air-conditioning installations for household purposes; central air-conditioning installations for industrial purposes; domestic air-conditioning installations; fans for air conditioning units; heat exchangers, other than parts of machines; heat pumps
75.
WATER HEAT EXCHANGER, MANUFACTURING METHOD OF WATER HEAT EXCHANGER, AND REFRIGERATION CYCLE APPARATUS
To provide a water heat exchanger, a manufacturing method of the water heat exchanger, and a refrigeration cycle apparatus capable of preventing corrosion of a brazing material and deterioration of a refrigerant. The water heat exchanger according to the present embodiment includes a plurality of stacked heat-exchange plates, a joint (9) provided on at least one cover plate (14) of a pair of cover plates sandwiching the plurality of heat exchange plates, a first refrigerant pipe (10) brazed to the joint (9) by a brazing material (11), and a protector (12) provided to prevent contact between the brazing material (11) and the refrigerant circulating to the plurality of heat exchange plates through the first refrigerant pipe (10) and the joint (9).
F25B 13/00 - Compression machines, plants or systems, with reversible cycle
F28D 1/03 - 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 plate-like or laminated conduits
F28F 19/04 - Preventing the formation of deposits or corrosion, e.g. by using filters by using coatings, e.g. vitreous or enamel coatings of varnish
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.
Boilers, other than parts of non-electric prime movers and
engines; air conditioners for industrial purposes; freezing
machines and apparatus for industrial purposes; gas-fired
water heaters; stoves for household purposes, non-electric;
water heaters; heat pumps; hot water heating installations;
air conditioning installations; air conditioners; air
conditioners for household purposes; air conditioning
apparatus; heating installations.
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)
Air conditioning apparatus; heat pumps, not for freezing machines and apparatus; air conditioners for industrial purposes; air conditioning installations; boilers, other than parts of machines, namely, electric boilers, heating boilers, furnace boilers, boilers for heating installation, and boilers operated by heat pump
(1) Air conditioners; air-conditioning units; boilers for heating installations; central air-conditioning installations for household purposes; central air-conditioning installations for industrial purposes; domestic air-conditioning installations; fans for air conditioning units; heat exchangers, other than parts of machines; heat pumps
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
An air conditioner of an embodiment includes a plurality of outdoor units, one or more indoor units, and a control unit. The outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, an outdoor expansion valve and an outdoor blower, and the outdoor units exchange heat between the outside air and a refrigerant. The indoor unit is an indoor unit connected to the plurality of outdoor units by a refrigerant pipe, includes an indoor heat exchanger, an indoor expansion valve, and an indoor blower, and exchanges heat between the indoor air and the refrigerant. The control unit controls the plurality of outdoor units and the one or more indoor units. The control unit controls the condensation pressure of the outdoor unit in a heating operation or the suction pressure of the outdoor unit in a defrosting operation to be equal to or smaller than an upper limit pressure, which is 1/1.5 times the rated maximum pressure during the heating operation when any of the outdoor units is in the defrosting operation.
F24F 11/89 - Arrangement or mounting of control or safety devices
F24F 11/42 - Defrosting; Preventing freezing of outdoor units
F24F 3/06 - 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 arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
F25B 5/02 - Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
According to one embodiment, an air conditioner carries out a heating operation, a cooling operation, a cooling/heating mixed operation in which a higher priority is given to cooling, and a cooling/heating mixed operation in which a higher priority is given to heating.
F24F 11/67 - Switching between heating and cooling modes
F24F 5/00 - Air-conditioning systems or apparatus not covered by group or
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
F24F 11/46 - Improving electric energy efficiency or saving
F25B 41/20 - Disposition of valves, e.g. of on-off valves or flow control valves
F25B 13/00 - Compression machines, plants or systems, with reversible cycle
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
A refrigeration cycle device of the embodiment includes a refrigerant flow path. The refrigerant flow path allows a refrigerant to flow through a compressor, a condenser, an expansion device, and an evaporator. The refrigerant contains CF3I. The refrigerant flow path includes a filter capable of capturing iodine ions.
F25B 43/00 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
F25B 43/02 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
An equipment-management device associated with at least one of multiple pieces of equipment in a building under management, the equipment-management device including a display-information generator, a touchscreen, and an action-control-information generator. The display-information generator generates display information on a management screen wherein icons are arranged, each of the icons including an outer frame and a first area set at one end along the major axis within the outer frame. The touchscreen displays the display information and receives an input of information relating to an operation performed on the management screen. Upon detecting that a slide operation performed on one of the icons of the management screen from the first area through a first slide-operation detecting line set inside the outer frame excluding the first area, the action-control-information generator generates action-control information that switches the power supply of the corresponding equipment on or off.
G06F 3/048 - Interaction techniques based on graphical user interfaces [GUI]
G06F 3/04886 - Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus
F24F 11/52 - Indication arrangements, e.g. displays
G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
G06F 3/04817 - Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance using icons
G06F 3/0482 - Interaction with lists of selectable items, e.g. menus
G06F 3/04847 - Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
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.
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.
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