WO2021234857A1 - 冷凍サイクル装置 - Google Patents
冷凍サイクル装置 Download PDFInfo
- Publication number
- WO2021234857A1 WO2021234857A1 PCT/JP2020/019945 JP2020019945W WO2021234857A1 WO 2021234857 A1 WO2021234857 A1 WO 2021234857A1 JP 2020019945 W JP2020019945 W JP 2020019945W WO 2021234857 A1 WO2021234857 A1 WO 2021234857A1
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- Prior art keywords
- refrigerant
- indoor
- unit
- indoor unit
- notification
- Prior art date
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims abstract description 176
- 238000011084 recovery Methods 0.000 claims abstract description 49
- 230000005856 abnormality Effects 0.000 claims description 74
- 239000007788 liquid Substances 0.000 claims description 42
- 230000010354 integration Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000563 toxic property Toxicity 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
- F25B2500/222—Detecting refrigerant leaks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/27—Problems to be solved characterised by the stop of the refrigeration cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0251—Compressor control by controlling speed with on-off operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/112—Fan speed control of evaporator fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
Definitions
- This disclosure relates to a refrigeration cycle device.
- Patent Document 1 discloses an air conditioner having an outdoor unit and an indoor unit, and a refrigerant circuit for circulating a refrigerant between the outdoor unit and the indoor unit.
- the indoor unit is provided with a leakage sensor that detects the refrigerant leaked from the refrigerant circuit.
- the air conditioner of Patent Document 1 is configured to stop the compressor to stop the flow of the refrigerant when an abnormality such as the leakage sensor reaches the end of its life, and notify the user by display or sound.
- An object of the present disclosure is to provide a refrigerating cycle device capable of suppressing leakage of refrigerant from a refrigerant circuit when an abnormality occurs in a leakage sensor.
- the refrigeration cycle device of the present disclosure is It is equipped with a refrigerant circuit that circulates the refrigerant and a leakage sensor that detects the refrigerant leaked from the refrigerant circuit.
- the operation mode includes a recovery mode in which the leakage sensor recognizes the occurrence of an abnormality and recovers the refrigerant at a predetermined location in the refrigerant circuit.
- the refrigerant when an abnormality occurs in the leakage sensor, the refrigerant is recovered at a predetermined location in the refrigerant circuit, so that the refrigerant leaks from the refrigerant circuit due to replacement of the leakage sensor or other maintenance. Can be suppressed.
- the refrigerating cycle device further includes a control device for controlling the refrigerant circuit.
- the control device executes the recovery mode.
- the refrigerating cycle device further includes a stop mode as an operation mode in which the refrigerating cycle device recognizes the occurrence of an abnormality in the leak sensor and stops the flow of the refrigerant in the refrigerant circuit.
- the control device executes the stop mode.
- the control device accepts the selection of the operation mode to be executed when the occurrence of the abnormality of the leakage sensor is recognized from the recovery mode and the stop mode.
- the control device accepts the selection of the operation mode to be executed when the occurrence of the abnormality of the leakage sensor is recognized from the recovery mode and the stop mode.
- the refrigerant circuit connects the heat source heat exchanger, the utilization heat exchanger, the compressor, and the liquid side end of the utilization heat exchanger to the liquid side end of the heat source heat exchanger.
- a first gas refrigerant pipe connecting the gas side end of the utilization heat exchanger and the suction pipe of the compressor, and a second gas connecting the gas side end of the heat source heat exchanger and the discharge pipe of the compressor.
- a refrigerant pipe, a liquid control valve provided in the liquid refrigerant pipe, and a gas control valve provided in the first gas refrigerant pipe are included. The control device closes the liquid control valve and operates the compressor at the start of operation in the recovery mode, and closes the gas control valve at the end of operation in the recovery mode.
- the control device closes the liquid control valve, and the compressor recovers the refrigerant to the heat source heat exchanger side between the liquid control valve and the gas control valve.
- the control device closes the liquid control valve, and the compressor recovers the refrigerant to the heat source heat exchanger side between the liquid control valve and the gas control valve.
- the abnormality is a failure of the leak sensor or the end of the life of the leak sensor.
- the refrigeration cycle device further includes a notification unit.
- the control device recognizes the life of the leak sensor when the integrated energization time of the leak sensor exceeds a predetermined first threshold value.
- the notification unit performs different notifications depending on whether the energization integration time exceeds the first threshold value or the energization integration time exceeds a predetermined second threshold value shorter than the first threshold value.
- the energization integrated time refers to the total time during which the leakage sensor is energized from the time when the leakage sensor is energized to the present time. With such a configuration, the serviceman or the user can know not only that the leak sensor has reached the end of its life but also that the life of the leak sensor is near by the notification of the notification unit.
- the refrigerating cycle device is an outdoor unit in which the refrigerant is circulated by the refrigerant circuit.
- a first indoor unit and a second indoor unit in which the refrigerant is circulated by the refrigerant circuit are provided.
- the first indoor unit has a first leakage sensor and a first notification unit.
- the second indoor unit has a second leakage sensor and a second notification unit. When an abnormality has occurred in the first leakage sensor and no abnormality has occurred in the second leakage sensor, the first notification unit and the second notification unit perform different notifications from each other.
- the first notification unit of the first indoor unit having the first leakage sensor in which an abnormality has occurred and the second notification unit of the second indoor unit perform different notifications from each other, thereby causing a serviceman or a user. Can grasp that an abnormality has occurred in the first leakage sensor not only by the first notification unit but also by the second notification unit.
- the first notification unit and the second notification unit are notified by different means, notification by different combinations of the plurality of means, or notification by a plurality of means including light, sound, and display.
- the same means are notified by different notification methods.
- the recovery mode is executed while the flow of the refrigerant is continued. do.
- FIG. 1 is a schematic configuration diagram showing a refrigerant circuit of the refrigeration cycle device according to the embodiment of the present disclosure.
- the refrigeration cycle device 11 is a device that performs a vapor compression refrigeration cycle operation by circulating a refrigerant through a refrigerant circuit 23.
- the refrigeration cycle device 11 of the present embodiment is an air conditioner that adjusts the temperature of the air in the room.
- the air conditioner 11 includes an indoor unit (user unit) 21 and an outdoor unit (heat source side unit) 22.
- the air conditioner 11 of the present embodiment is a multi-type air conditioner in which a plurality of indoor units 21 are connected in parallel to the outdoor unit 22.
- the refrigerant a refrigerant having at least one of flammable, slightly flammable, and toxic properties, for example, an R32 refrigerant is used.
- the refrigerant circuit 23 includes a compressor 30, a four-way switching valve 32, an outdoor heat exchanger (heat source heat exchanger) 31, an outdoor expansion valve 34, a liquid control valve 35, a liquid closing valve 36, an indoor expansion valve 24, and an indoor heat exchange.
- a device (utilized heat exchanger) 25, a gas closing valve 37, a gas control valve 38, and refrigerant pipes 40L and 40G connecting them are provided.
- the indoor unit 21 includes an indoor expansion valve 24 constituting a refrigerant circuit 23 and an indoor heat exchanger 25.
- the indoor expansion valve 24 is composed of an electric expansion valve capable of adjusting the refrigerant pressure and the refrigerant flow rate.
- the indoor heat exchanger 25 is a cross-fin tube type or microchannel type heat exchanger, and is used for heat exchange with indoor air.
- the indoor unit 21 further includes an indoor fan 26 and a leak sensor 27.
- the indoor fan 26 is configured to take indoor air into the indoor unit 21, exchange heat between the taken-in air and the indoor heat exchanger 25, and then blow the air into the room. ..
- the indoor fan 26 includes a motor whose operating rotation speed can be adjusted by inverter control.
- the leak sensor 27 detects the refrigerant leaked from the refrigerant circuit 23.
- the leak sensor 27 is provided in the vicinity of the refrigerant pipe inside the indoor unit 21.
- the leak sensor 27 may be provided on the remote controller 42, which will be described later, or on the ceiling, wall, floor, or the like in the room.
- the outdoor unit 22 includes a compressor 30, a four-way switching valve 32, an outdoor heat exchanger 31, an outdoor expansion valve 34, a liquid control valve 35, a liquid closing valve 36, a gas closing valve 37, and a gas control constituting the refrigerant circuit 23. It is equipped with a valve 38.
- the compressor 30 sucks the low-pressure gas refrigerant and discharges the high-pressure gas refrigerant.
- the compressor 30 includes a motor whose operating rotation speed can be adjusted by inverter control.
- the compressor 30 is a variable capacity type (variable capacity type) in which the capacity (capacity) can be changed by controlling the motor with an inverter.
- the compressor 30 may be of a constant capacity type.
- a plurality of compressors 30 may be provided. In this case, a variable capacity compressor and a constant capacity compressor may be mixed.
- the four-way switching valve 32 reverses the flow of the refrigerant in the refrigerant pipe, and switches the refrigerant discharged from the compressor 30 to one of the outdoor heat exchanger 31 and the indoor heat exchanger 25 to supply the refrigerant.
- the air conditioner 11 can switch between the cooling operation and the heating operation.
- the outdoor heat exchanger 31 is, for example, a cross fin tube type or microchannel type heat exchanger, and is used for heat exchange with a refrigerant using air as a heat source.
- the outdoor expansion valve 34 is composed of an electric expansion valve capable of adjusting the refrigerant pressure and the refrigerant flow rate.
- the liquid shutoff valve 36 is a manual on-off valve.
- the gas shutoff valve 37 is also a manual on-off valve.
- the liquid closing valve 36 and the gas closing valve 37 shield the flow of the refrigerant in the refrigerant pipes 40L and 40G by closing, and allow the flow of the refrigerant in the refrigerant pipes 40L and 40G by opening.
- the liquid control valve 35 switches between a form that allows the flow of the refrigerant in the liquid refrigerant pipe 40L and a form that shields the flow of the refrigerant.
- the gas control valve 38 switches between a form that allows the flow of the refrigerant in the gas refrigerant pipe 40G and a form that shields the flow of the refrigerant.
- an electric expansion valve is used as in the outdoor expansion valve 34 and the indoor expansion valve 24.
- the refrigerant pipe includes a liquid refrigerant pipe 40L and a gas refrigerant pipe 40G.
- the liquid refrigerant pipe 40L is provided between the liquid side refrigerant inlet / outlet (hereinafter, also referred to as “liquid side end”) of the indoor heat exchanger 25 and the liquid side end of the outdoor heat exchanger 31.
- the gas refrigerant pipe 40G is provided between the gas-side refrigerant inlet / outlet (hereinafter, also referred to as “gas-side end”) of the indoor heat exchanger 25 and the gas-side end of the outdoor heat exchanger 31.
- the liquid refrigerant pipe 40L is provided with an outdoor expansion valve 34, a gas control valve 38, a gas closing valve 37, and an indoor expansion valve 24.
- the gas refrigerant pipe 40G is provided with a compressor 30, a four-way switching valve 32, a gas control valve 38, and a gas closing valve 37.
- the portion on the suction side of the compressor 30 during the cooling operation described later is referred to as the first gas refrigerant pipe 40Ga
- the portion on the discharge side of the compressor 30 is referred to as the second gas refrigerant pipe 40Gb. That is.
- the outdoor unit 22 is further provided with an outdoor fan 33.
- the outdoor fan 33 includes a motor whose operating rotation speed can be adjusted by inverter control.
- the outdoor fan 33 takes in the outdoor air into the outdoor unit 22, exchanges heat between the taken-in air and the outdoor heat exchanger 31, and then blows the air out of the outdoor unit 22. It is configured.
- the four-way switching valve 32 is held in the state shown by the solid line in FIG.
- the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 30 flows into the outdoor heat exchanger 31 via the four-way switching valve 32, and exchanges heat with the outdoor air by the operation of the outdoor fan 33 to dissipate heat.
- the radiated refrigerant passes through the outdoor expansion valve 34 and the liquid control valve 35 in the fully open state and flows into each indoor unit 21.
- the refrigerant is depressurized to a predetermined low pressure by the indoor expansion valve 24, and further heat exchanges with the indoor air by the indoor heat exchanger 25 to evaporate.
- the indoor air cooled by the evaporation of the refrigerant is blown into the room by the indoor fan 26 to cool the room.
- the refrigerant evaporated in the indoor heat exchanger 25 returns to the outdoor unit 22 through the gas refrigerant pipe 40G, and is sucked into the compressor 30 through the four-way switching valve 32.
- the four-way switching valve 32 When the air conditioner 11 performs the heating operation, the four-way switching valve 32 is held in the state shown by the broken line in FIG.
- the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 30 passes through the gas control valve 38 in the fully open state via the four-way switching valve 32, and flows into the indoor heat exchanger 25 of each indoor unit 21.
- the indoor heat exchanger 25 In the indoor heat exchanger 25, the refrigerant exchanges heat with the indoor air to dissipate heat.
- the indoor air heated by the heat radiation of the refrigerant is blown into the room by the indoor fan 26 to heat the room.
- the liquefied refrigerant in the indoor heat exchanger 25 returns to the outdoor unit 22 through the liquid refrigerant pipe 40L, is depressurized to a predetermined low pressure by the outdoor expansion valve 34, and further exchanges heat with the outdoor air by the outdoor heat exchanger 31. Evaporate. Then, the refrigerant evaporated and vaporized by the outdoor heat exchanger 31 is sucked into the compressor 30 via the four-way switching valve 32.
- FIG. 2 is a block diagram showing the configuration of the refrigeration cycle device.
- two indoor units 21a and 21b are shown, and these may be referred to as a first indoor unit 21a and a second indoor unit 21b.
- the indoor unit 21 includes an indoor control unit 29 and a remote controller 42 (hereinafter, also simply referred to as “remote controller”).
- the indoor control unit 29 is composed of a CPU, a microcomputer having a memory, and the like.
- the indoor control unit 29 controls the operation of the indoor fan 26 and the indoor expansion valve 24 described above. Further, the indoor control unit 29 receives the signal transmitted from the leak sensor 27.
- the leakage sensor 27 transmits a detection signal indicating the presence or absence of leakage of the refrigerant from the refrigerant circuit 23 and a signal indicating that it has failed to the indoor control unit 29.
- the remote controller 42 is communicably connected to the indoor control unit 29.
- the user can perform an on / off operation of the air conditioner 11 and an operation of inputting a set temperature to the remote controller 42.
- the remote controller 42 of the embodiment has a display panel (display unit) 43, a light (light emitting unit) 44, and a buzzer (sounding unit) 45. As will be described later, these constitute a “notifying unit” that notifies the user or the service person when the leakage sensor 27 fails or reaches the end of its life.
- the outdoor unit 22 includes an outdoor control unit 39.
- the outdoor control unit 39 is composed of a CPU, a microcomputer having a memory, and the like.
- the outdoor control unit 39 controls the operations of the compressor 30, the outdoor fan 33, the outdoor expansion valve 34, the liquid control valve 35, and the gas control valve 38.
- the outdoor control unit 39 is communicably connected to a plurality of indoor control units 29.
- the air conditioner 11 of the present embodiment has an operation mode to be executed when the occurrence of an abnormality in the leak sensor 27 is recognized. Specifically, the air conditioner 11 has a "stop mode” for stopping the operation of the air conditioner 11 when it recognizes the occurrence of an abnormality in the leak sensor 27, and a "recovery mode” for collecting the refrigerant at a predetermined position in the refrigerant circuit 23. It has a mode (pump down mode) as an operation mode.
- the stop mode and the collection mode are selected according to the user's wishes and the installation environment.
- the outdoor control unit 39 of the air conditioner 11 has a selection reception unit including a DIP switch or the like for receiving selection of an operation mode.
- the serviceman or the like can select one of the operation modes by the selection reception unit.
- the air conditioner 11 of the present embodiment recognizes that the leak sensor 27 has failed as an abnormality of the leak sensor 27.
- the leak sensor 27 transmits the signals shown in the following (a) to (c) to the indoor control unit 29.
- the indoor control unit 29 When the indoor control unit 29 receives the signals (a) and (b) above, it recognizes that the leakage sensor 27 is functioning normally. When the indoor control unit 29 receives the signal of (c) above, it recognizes that the leakage sensor 27 is out of order. Further, when the indoor control unit 29 receives an unknown signal which does not correspond to any of the above (a) to (c), and when the signal from the leak sensor 27 is interrupted, the leak sensor 27 fails. Recognize that you are doing.
- the air conditioner 11 of the present embodiment recognizes that the leakage sensor 27 has reached the end of its life in addition to the above-mentioned failure as an abnormality of the leakage sensor 27.
- the leak sensor 27 has a life set, which is the useful life, for each product. For example, since the leakage sensor 27 deteriorates due to energization, the life is set by the energization integrated time.
- the indoor control unit 29 counts the energization integration time from the time when the leakage sensor 27 is energized. Then, when the energization integration time exceeds a predetermined first threshold value, the indoor control unit 29 recognizes that the leakage sensor 27 has reached the end of its life.
- the indoor control unit 29 recognizes that the life of the leakage sensor 27 is near when the energization integration time exceeds a predetermined second threshold value smaller than the first threshold value.
- the first threshold can be, for example, 5 years
- the second threshold can be, for example, 4.5 years.
- the values of the first threshold value and the second threshold value are not limited, and are appropriately set according to the leakage sensor 27 to be used.
- FIG. 3 is a flowchart showing a processing procedure of the control device when the recovery mode is executed due to the life of the leakage sensor.
- FIG. 3 attention is paid to the two indoor units 21 (first indoor unit 21a and second indoor unit 21b) constituting the air conditioner 11, and the leakage sensor (first leakage sensor) in one of the first indoor units 21a.
- An example is shown in which 27 has reached the end of its life and the leakage sensor 27 (second leakage sensor) 27 of the other second indoor unit 21b has not reached the end of its life.
- the indoor control unit 29 of the first indoor unit 21a and the second indoor unit 21b counts the energization integrated times T 1 and T 2 of the leakage sensor 27, respectively (steps S21 and S31).
- the indoor control unit 29 transmits the information to the outdoor control unit 39 of the outdoor unit 22 (step S22).
- the outdoor control unit 39 transmits an instruction to notify the indoor control unit 29 of the first indoor unit 21a of the life advance notice based on the information received from the indoor control unit 29 (step S11).
- the indoor control unit 29 of the first indoor unit 21a uses at least one of the display panel 43, the light 44, and the buzzer 45 of the remote controller 42 to notify that the leakage sensor 27 is nearing the end of its life based on the instruction of the outdoor control unit 39. (Step S23). Based on the notification on the remote controller 42, the user, the serviceman, etc. can grasp that the life of the leak sensor 27 of the first indoor unit 21a is approaching, and prepare for replacement of the leak sensor 27 in advance. Can be done. The specific mode of notification will be described later.
- the indoor control unit 29 transmits the information to the outdoor control unit 39 (step S24).
- the outdoor control unit 39 transmits an instruction to notify the life of each indoor control unit 29 of the first indoor unit 21a and the second indoor unit 21b based on the information received from the indoor control unit 29 (step). S12).
- the indoor control unit 29 of the first indoor unit 21a and the second indoor unit 21b which received an instruction from the outdoor control unit 39, uses at least one of the display panel 43, the light 44, and the buzzer 45 in the remote controller 42, respectively, in the first room. Notifying that the leakage sensor 27 of the machine 21a has reached the end of its life (steps S25 and S32).
- the indoor control unit 29 of the first indoor unit 21a is in the instruction from the outdoor control unit 39 (step S11, S12) without energizing the integration time T 1 and the second threshold value T th2 or the first threshold value T of the leakage sensor 27 Notification may be executed when th1 is exceeded.
- the outdoor control unit 39 executes the recovery mode. Specifically, when the air conditioner 11 is in the cooling operation or the heating operation, the outdoor control unit 39 temporarily stops the compressor 30 (step S14). Then, the four-way switching valve 32 is switched to the same mode as the cooling operation, the liquid control valve 35 is closed, and then the compressor 30 is operated (steps S15 and S16). Further, the outdoor control unit 39 transmits an instruction to operate the indoor fan 26 to each indoor control unit 29, and each indoor control unit 29 sends the indoor fan 26 when the indoor fan 26 is stopped. It is operated, and if the indoor fan 26 is operating, it is continued as it is (steps S26 and S33).
- the refrigerant in the refrigerant circuit 23 is recovered to the outdoor heat exchanger 31 side between the liquid control valve 35 and the gas control valve 38.
- the refrigerant is mainly recovered inside the outdoor heat exchanger 31.
- the outdoor control unit 39 closes the gas control valve 38, stops the compressor 30 (step S17), and transmits a notification of the end of the recovery mode to the indoor control unit 29. (Step S18).
- Each indoor heat exchanger 25 stops the indoor fan 26 based on the notification of the end of the recovery mode. As a result, all the processes related to the collection mode are completed.
- the air conditioner 11 of the present embodiment recovers the refrigerant as the life of the leak sensor 27 reaches the end of its life, the refrigerant pipe 40L, due to the subsequent replacement work of the leak sensor 27 and other maintenance work, Even if the 40G is damaged, it is possible to prevent the refrigerant from leaking.
- the leakage sensor 27 When the leakage sensor 27 reaches the end of its life, even if the refrigerant leaks, it may not be detected accurately. Therefore, during the execution of the recovery mode, the indoor fan 26 is operated in each indoor unit 21 and the leakage occurs. By diffusing the refrigerant, the retention in the room is suppressed. However, it is not always necessary to operate the indoor fan 26 while the recovery mode is being executed.
- the place where the refrigerant is recovered in the refrigerant circuit 23 may be an accumulator or a receiver (both not shown) provided in the refrigerant circuit 23 in place of or in addition to the outdoor heat exchanger 31.
- the compressor 30 was temporarily stopped when the recovery mode was started, but when the compressor 30 is operated by the cooling operation or the heating operation, the compressor 30 is recovered without stopping. You may switch to the mode. In this case, it is possible to quickly shift from the normal operation to the operation in the recovery mode.
- the indoor unit 21 whose leakage sensor 27 has reached the end of its life is processed by the first indoor unit 21a, and the leakage sensor 27 has reached the end of its life.
- the above-mentioned processing of the second indoor unit 21b is performed.
- FIG. 4 is a flowchart showing a processing procedure of the control device when the recovery mode is executed due to a failure of the leakage sensor.
- the indoor control unit 29 of the first indoor unit 21a and the second indoor unit 21b receives a signal from the leakage sensor 27 as to whether or not the refrigerant has leaked.
- the indoor control unit 29 in the first indoor unit 21a recognizes the failure of the leak sensor 27, the indoor control unit 29 transmits the information to the outdoor control unit 39 (step S51).
- the outdoor control unit 39 transmits an instruction to notify the indoor control unit 29 of the first indoor unit 21a and the second indoor unit 21b of the failure based on the information received from the indoor control unit 29 (step). S41).
- the indoor control unit 29 of the first indoor unit 21a and the second indoor unit 21b uses at least one of the display panel 43, the light 44, and the buzzer 45 of the remote controller 42 based on the instruction from the outdoor control unit 39, and is in the first room.
- Notifying that the leakage sensor 27 of the machine 21a has failed steps S53 and S62.
- the user, the serviceman, and the like can grasp that the leakage sensor 27 has failed based on the notification on the remote controller 42.
- the outdoor control unit 39 executes the recovery mode when it recognizes that the leak sensor 27 has failed.
- the processing of the outdoor control unit 39 (S42 to S47) and the processing of the indoor control unit 29 (S53 to S54, S62 to S63) in this recovery mode are the same as the processing of the recovery mode due to the life of the leakage sensor 27.
- the air conditioner 11 of the present embodiment has a recovery mode and a stop mode as an operation mode when an abnormality occurs in the leak sensor 27, and either of these two modes is selected. You can do it. Then, when the stop mode is selected, the stop mode is executed instead of the execution of the recovery mode (steps S13 and S42) in FIGS. 3 and 4, and the control devices 29 and 39 use the compressor 30, the outdoor fan 33, and The indoor fan 26 and the like are stopped, and the liquid control valve 35 and the gas control valve 38 are closed.
- FIG. 5 is a table showing the mode of notification when the recovery mode is selected. As described above, in the remote controller 42 of the first indoor unit 21a and the second indoor unit 21b, when the leakage sensor 27 fails, reaches the end of its life, or nears the end of its life, a notification indicating these abnormalities is sent. It will be done. FIG. 5 shows a specific mode of notification according to each case.
- the display panel 43 of the first indoor unit 21a displays an abnormality indicating the failure of the leak sensor 27. A is performed, and at the same time, the light 44 emits light and the buzzer 45 sounds. At this time, the display panel 43 of the second indoor unit 21b is provided with an abnormality display C indicating an abnormality of the leakage sensor 27 of the other indoor unit (first indoor unit) 21a, and the light 44 and the buzzer 45 do not operate.
- the first indoor unit 21a and the second indoor unit 21b are notified differently from each other, so that the user and the serviceman can fail the leakage sensor 27 in the first indoor unit 21a due to the notification of the first indoor unit 21a.
- the notification of the second indoor unit 21b causes an abnormality in the indoor units other than the second indoor unit 21b connected to the second indoor unit 21b. You can recognize that.
- the user or the serviceman indicates that an abnormality has occurred in the first indoor unit 21a not only by the notification of the first indoor unit 21a but also by the notification of the second indoor unit 21b. Can be recognized.
- the display panel 43 of the first indoor unit 21a has the life of the leakage sensor 27.
- An abnormality display B indicating arrival is performed, and at the same time, the light 44 emits light and the buzzer 45 sounds.
- an abnormality display C indicating an abnormality of the leakage sensor 27 of the other indoor unit (first indoor unit) 21a is made, and the light 44 and the buzzer 45 do not operate.
- the first indoor unit 21a and the second indoor unit 21b are notified differently from each other, so that the user and the serviceman can use the notification of the first indoor unit 21a to cause the leakage sensor 27 to reach the end of its life in the first indoor unit 21a.
- the notification of the second indoor unit 21b causes an abnormality in the indoor units other than the second indoor unit 21b connected to the second indoor unit 21b.
- the user or the serviceman indicates that an abnormality has occurred in the first indoor unit 21a not only by the notification of the first indoor unit 21a but also by the notification of the second indoor unit 21b. Can be recognized.
- the recovery mode is executed, the cooling operation and the heating operation by the air conditioner 11 become impossible, and the operation of the air conditioner 11 is substantially prohibited. Therefore, the user or the like can grasp that the operation of the air conditioner 11 is prohibited not only by the notification by the first indoor unit 21a but also by the notification by the second indoor unit 21b.
- the display panel 43 of the first indoor unit 21a gives a notice of the life of the leak sensor 27.
- the maintenance display shown is displayed, and the light 44 and the buzzer 45 do not operate.
- the display panel 43 of the second indoor unit 21b does not display the abnormality, and neither the light 44 nor the buzzer 45 operates.
- the notification is performed only by the first indoor unit 21a having the leak sensor 27 that has reached the end of its life, the user or the serviceman can easily inform that the leak sensor 27 of the first indoor unit 21a has reached the end of its life. Can be grasped.
- FIG. 6 is a table showing the mode of notification when the stop mode is selected. If the leak sensor 27 of the first indoor unit 21a has failed and the leak sensor 27 of the second indoor unit 21b has not failed, the display panel 43 of the first indoor unit 21a displays an abnormality indicating the failure of the leak sensor 27. A is performed, and at the same time, the light 44 emits light and the buzzer 45 sounds. At this time, the display panel 43 of the second indoor unit 21b is not displayed to indicate an abnormality, and the light 44 and the buzzer 45 do not operate. However, when a user or the like operates the remote controller 42, an error display is displayed on the display panel 43.
- the user or the service person can recognize that the leakage sensor 27 of the first indoor unit 21a is out of order by the notification of the first indoor unit 21a. Further, the user or the serviceman can use the other indoor units other than the second indoor unit 21b connected to the second indoor unit 21b by the notification (error display) of the second indoor unit 21b when the remote controller 42 is operated. It is possible to recognize that an abnormality has occurred in the leak sensor 27. When there are two indoor units, the user or the serviceman indicates that an abnormality has occurred in the first indoor unit 21a not only by the notification of the first indoor unit 21a but also by the notification of the second indoor unit 21b. Can be recognized.
- the display panel 43 of the first indoor unit 21a is notified that the leakage sensor 27 has reached the end of its life.
- the abnormality display B shown is performed, and at the same time, the light 44 emits light and the buzzer 45 sounds.
- the display panel 43 of the second indoor unit 21b is not displayed to indicate an abnormality, and the light 44 and the buzzer 45 do not operate.
- an error display is displayed.
- the user or the service person can recognize that the leakage sensor 27 of the first indoor unit 21a has reached the end of its life by the notification of the first indoor unit 21a. Further, the user or the serviceman can use the other indoor units other than the second indoor unit 21b connected to the second indoor unit 21b by the notification (error display) of the second indoor unit 21b when the remote controller 42 is operated. It is possible to recognize that an abnormality has occurred in the leak sensor 27. When there are two indoor units, the user or the serviceman indicates that an abnormality has occurred in the first indoor unit 21a not only by the notification of the first indoor unit 21a but also by the notification of the second indoor unit 21b. Can be recognized.
- the display panel 43 of the first indoor unit 21a gives a notice of the life of the leak sensor 27.
- the maintenance display shown is displayed, and the light 44 and the buzzer 45 do not operate.
- the display panel 43 of the second indoor unit 21b does not display the abnormality, and neither the light 44 nor the buzzer 45 operates.
- the notification is performed only by the first indoor unit 21a having the leak sensor 27 that has reached the end of its life, the user or the serviceman can easily inform that the leak sensor 27 of the first indoor unit 21a has reached the end of its life. Can be grasped.
- the abnormality displays A, B, and C performed on the display panel 43 of the remote controller 42 may be a code indicating an abnormality or may be the content of the abnormality itself.
- the maintenance display and the error display performed on the display panel 43 may also be a code display or a display of the content itself.
- the notification mode of the notification units 43, 44, 45 when an abnormality occurs in the leakage sensor 27 can be variously changed.
- the first indoor unit 21a in which the leakage sensor 27 has an abnormality and the second indoor unit 21b in which the abnormality has not occurred are different from each other by using the same means among the display panel 43, the light 44, and the buzzer 45.
- Notification may be performed.
- both the first indoor unit 21a and the second indoor unit 21b use the light 44 for notification, one light 44 can be blinked and the other light 44 can be turned on.
- the first indoor unit 21a in which the abnormality has occurred in the leakage sensor 27 and the second indoor unit 21b in which the abnormality has not occurred are notified by using different means of the display panel 43, the light 44, and the buzzer 45. You may.
- the light 44 may be turned on in the first indoor unit 21a, and the buzzer 45 may be activated in the second indoor unit 21b.
- the refrigerating cycle device 11 of the above embodiment includes a refrigerant circuit 23 for circulating the refrigerant and a leakage sensor 27 for detecting the refrigerant leaked from the refrigerant circuit 23, and recognizes the occurrence of an abnormality in the leakage sensor 27.
- a recovery mode for recovering the refrigerant at a predetermined location in the refrigerant circuit 23 is provided as an operation mode. Therefore, it is possible to prevent the refrigerant from leaking from the refrigerant circuit 23 due to replacement of the leakage sensor 27 or other maintenance.
- the refrigerating cycle device 11 of the above embodiment further includes a control device (indoor control unit 29 and outdoor control unit 39) for controlling the refrigerant circuit 23.
- the control devices 29 and 39 execute the recovery mode.
- the refrigerating cycle device 11 further includes a stop mode as an operation mode for recognizing the occurrence of an abnormality in the leak sensor 27 and stopping the flow of the refrigerant in the refrigerant circuit 23, and the control devices 29 and 39 execute the stop mode. ..
- the control devices 29 and 39 accept the selection of the operation mode to be executed when the occurrence of the abnormality of the leakage sensor 27 is recognized from the recovery mode and the stop mode. Therefore, depending on the installation environment of the refrigeration cycle device 11, it is possible to select whether to execute the recovery mode or the stop mode when an abnormality occurs in the leakage sensor 27.
- the refrigerant circuit 23 of the above embodiment connects the liquid side end of the heat source heat exchanger 31, the utilization heat exchanger 25, the compressor 30, the utilization heat exchanger 25 and the liquid side end of the heat source heat exchanger 31.
- Liquid refrigerant pipe 40L, first gas refrigerant pipe 40Ga connecting the gas side end of the utilization heat exchanger 25 and the suction pipe of the compressor 30, the gas side end of the heat source heat exchanger 31 and the discharge pipe of the compressor 30.
- the second gas refrigerant pipe 40Gb, the liquid control valve 35 provided in the liquid refrigerant pipe 40L, and the gas control valve 38 provided in the first gas refrigerant pipe 40Ga are included, and the control devices 29 and 39 are recovered.
- the liquid control valve 35 is closed and the compressor 30 is operated at the start of the operation in the mode, and the gas control valve 38 is closed at the end of the operation in the recovery mode.
- the control devices 29 and 39 close the liquid control valve 35, so that the refrigerant is placed on the heat source heat exchanger 31 side between the liquid control valve 35 and the gas control valve 38.
- the gas control valve 38 By closing the gas control valve 38 at the end of the operation in the recovery mode, it is possible to prevent the refrigerant from flowing back to the heat exchanger 25 side.
- the abnormality of the leak sensor 27 is a failure of the leak sensor 27 or the end of the life of the leak sensor 27.
- the refrigeration cycle device 11 further includes a notification unit (display panel 43, light 44, buzzer 45), and the control devices 29 and 39 leak when the energization integration time of the leak sensor 27 exceeds a predetermined first threshold value T th1. Recognizing the life of the sensor 27, the notification units 43, 44, and 45 indicate a predetermined second threshold value T th2 in which the energization integration time exceeds the first threshold value T th1 and the energization integration time is shorter than the first threshold value T th1.
- the notifications are different from each other depending on the case where the value exceeds. As a result, the serviceman and the user can know not only that the leakage sensor 27 has reached the end of its life but also that the life of the leak sensor 27 is near by the notification of the notification units 43, 44, 45.
- the refrigerating cycle device 11 includes an outdoor unit 22 in which the refrigerant is circulated by the refrigerant circuit 23, and a first indoor unit 21a and a second indoor unit 21b in which the refrigerant is circulated by the refrigerant circuit 23. Equipped with.
- the first indoor unit 21a has a leak sensor (first leak sensor) 27 and a notification unit (first notification unit) 43, 44, 45
- the second indoor unit 21b has a leakage sensor (second leakage sensor). It has 27 and a notification unit (second notification unit) 43, 44, 45.
- the notification units 43, 44, 45 of the first indoor unit 21a and the second Notifications different from those of the notification units 43, 44, 45 of the indoor unit 21b are performed.
- the notification units 43, 44, 45 of the first indoor unit 21a having the leakage sensor 27 in which the abnormality has occurred and the notification units 43, 44, 45 of the second indoor unit 21b perform different notifications from each other.
- the serviceman or the user causes an abnormality in the leakage sensor 27 of the first indoor unit 21a not only by the notification units 43, 44, 45 of the first indoor unit 21a but also by the notification units 43, 44, 45 of the second indoor unit 21b. Can be grasped that has occurred.
- the notification units 43, 44, 45 of the first indoor unit 21a and the notification units 43, 44, 45 of the second indoor unit 21b are a plurality of means including light, sound, and display. Of these, notification is performed by means different from each other, notification by different combinations of a plurality of means, or notification by different notification methods of the same means. Therefore, when an abnormality occurs in the leakage sensor 27 of the first indoor unit 21a, the notification unit 43, 44, 45 of the first indoor unit 21a and the notification unit 43, 44, 45 of the second indoor unit 21b notify. The difference between the serviceman and the user can be clearly identified.
- control devices 29 and 39 when the control devices 29 and 39 recognize the occurrence of an abnormality in the leakage sensor 27 while the refrigerant is circulating in the refrigerant circuit 23, the control devices 29 and 39 collect the refrigerant circuit 23 while continuing the flow of the refrigerant. Run the mode. In this case, when an abnormality occurs in the leak sensor 27, the normal operation can be quickly shifted to the recovery mode.
- Refrigeration cycle device air conditioner
- Indoor unit 22 Outdoor unit 23: Refrigerant circuit
- Compressor 31 Outdoor heat exchanger (heat source heat exchanger)
- 35 Liquid control valve 38: Gas control valve 39: Outdoor control unit (control device) 40Ga: 1st gas refrigerant pipe 40Gb: 2nd gas refrigerant pipe 40L: Liquid refrigerant pipe
- T 1 Energization integrated time
- T 2 Energization integrated time
- T th1 First threshold value
- T th2 Second threshold value
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Abstract
Description
冷媒を循環させる冷媒回路と、前記冷媒回路から漏洩した冷媒を検出する漏洩センサと、を備え、
前記漏洩センサの異常の発生を認識して前記冷媒回路中の所定箇所に冷媒を回収する回収モードを、運転モードとして備えている。
前記制御装置は、前記回収モードを実行する。
前記制御装置は、前記停止モードを実行する。
このような構成によって、冷凍サイクル装置の設置環境等に応じて、漏洩センサに異常が発生した場合に回収モードと停止モードとのどちらを実行するかを選択することができる。
前記制御装置は、前記回収モードによる運転開始の際に前記液制御弁を閉じかつ前記圧縮機を作動させ、前記回収モードによる運転終了の際に前記ガス制御弁を閉じる。
このような構成によって、回収モードによる運転を開始する際に、制御装置が液制御弁を閉じることで、圧縮機により液制御弁とガス制御弁との間における熱源熱交換器側に冷媒を回収することができ、回収モードの運転を終了する際に、ガス制御弁を閉じることで、冷媒が利用熱交換器側に逆流するのを抑制することができる。
前記制御装置は、前記漏洩センサの通電積算時間が所定の第1閾値を超えることで前記漏洩センサの寿命を認識し、
前記報知部は、前記通電積算時間が前記第1閾値を超える場合と、前記通電積算時間が前記第1閾値よりも短い所定の第2閾値を超える場合とで、互いに異なる報知を行う。
ここで、通電積算時間とは、漏洩センサに通電を開始した時点から現時点までの漏洩センサに通電している時間の総計のことをいう。このような構成によって、サービスマンやユーザは、漏洩センサが寿命に達したことだけでなく寿命が近いことを報知部の報知により把握することができる。
前記冷媒回路によって冷媒が循環される第1室内機及び第2室内機と、を備え、
前記第1室内機が、第1漏洩センサと第1報知部とを有し、
前記第2室内機が、第2漏洩センサと第2報知部とを有し、
前記第1漏洩センサに異常が発生し、前記第2漏洩センサに異常が発生していない場合、前記第1報知部と、前記第2報知部とが互いに異なる報知を行う。
この構成によれば、異常が発生した第1漏洩センサを有する第1室内機の第1報知部と、第2室内機の第2報知部とが互いに異なる報知を行うことで、サービスマンやユーザは、第1報知部だけでなく第2報知部によっても第1漏洩センサに異常が発生したことを把握することができる。
このような構成によって、第1漏洩センサに異常が生じた場合の第1報知部と第2報知部との報知の違いをサービスマンやユーザが明確に把握することができる。
このような構成によって、漏洩センサに異常が発生した場合に、通常の運転から回収モードに迅速に移行することができる。
図1は、本開示の一実施形態に係る冷凍サイクル装置の冷媒回路を示す概略的な構成図である。
図1に示すように、冷凍サイクル装置11は、冷媒回路23によって冷媒を循環させることにより蒸気圧縮式の冷凍サイクル運転を行う装置である。具体的に、本実施形態の冷凍サイクル装置11は、室内の空気の温度を調整する空気調和機である。空気調和機11は、室内機(利用側ユニット)21と室外機(熱源側ユニット)22とを備えている。本実施形態の空気調和機11は、室外機22に対して複数台の室内機21が並列に接続されたマルチタイプの空気調和機である。本実施形態では、冷媒として、可燃性、微燃性、及び毒性のうち少なくとも1つの性質を持つ冷媒、例えばR32冷媒が用いられる。
圧縮機30は、低圧のガス冷媒を吸引し高圧のガス冷媒を吐出する。圧縮機30は、インバータ制御によって運転回転数を調整可能なモータを備えている。圧縮機30は、モータがインバータ制御されることによって容量(能力)を変更可能な可変容量型(能力可変型)である。ただし、圧縮機30は一定容量型であってもよい。また、圧縮機30は複数台設けられていてもよい。この場合、容量可変型の圧縮機と一定容量形の圧縮機とが混在していてもよい。
室外膨張弁34は、冷媒圧力の調節や冷媒流量の調節を行うことが可能な電動膨張弁により構成されている。
室内制御部29は、CPU及びメモリを有するマイクロコンピュータ等により構成されている。室内制御部29は、前述した室内ファン26及び室内膨張弁24の動作を制御する。また、室内制御部29は、漏洩センサ27から送信された信号を受信する。漏洩センサ27は、冷媒回路23からの冷媒の漏洩の有無を示す検出信号、及び、自らが故障したことを示す信号を室内制御部29に送信する。
室外制御部39は、CPU及びメモリを有するマイクロコンピュータ等により構成されている。室外制御部39は、圧縮機30、室外ファン33、室外膨張弁34、液制御弁35、及びガス制御弁38の動作を制御する。室外制御部39は、複数の室内制御部29と通信可能に接続されている。
本実施形態の空気調和機11は、漏洩センサ27の異常の発生を認識したときに実行する運転モードを有している。具体的に、空気調和機11は、漏洩センサ27の異常の発生を認識したときに空気調和機11の運転を停止させる「停止モード」と、冷媒回路23の所定箇所に冷媒を回収する「回収モード(ポンプダウンモード)」とを運転モードとして有している。空気調和機11の制御装置である室外制御部39及び室内制御部29は、停止モード又は回収モードを実行する。
(a)漏洩センサ27が冷媒の漏洩を検出していないことを示す信号
(b)漏洩センサ27が冷媒の漏洩を検出したことを示す信号
(c)漏洩センサ27の故障を示す信号
(漏洩センサの寿命による回収モード)
以下、制御装置29,39による回収モードの処理手順について説明する。
図3は、漏洩センサの寿命により回収モードを実行する場合の制御装置の処理手順を示すフローチャートである。図3では、空気調和機11を構成する2台の室内機21(第1室内機21a及び第2室内機21b)に注目し、一方の第1室内機21aにおける漏洩センサ(第1漏洩センサ)27が寿命に到達し、他方の第2室内機21bの漏洩センサ27(第2漏洩センサ)27が寿命に到達していない例を示している。
図4は、漏洩センサの故障により回収モードを実行する場合の制御装置の処理手順を示すフローチャートである。
第1室内機21a及び第2室内機21bの室内制御部29は、前述したように漏洩センサ27から冷媒の漏洩の有無についての信号を受信する。第1室内機21aにおける室内制御部29は、漏洩センサ27の故障を認識すると、その情報を室外制御部39に送信する(ステップS51)。
前述したように、本実施形態の空気調和機11は、漏洩センサ27に異常が発生したときの運転モードとして、回収モードと停止モードとを有しており、この2つのモードのいずれかを選択できるようになっている。そして、停止モードが選択された場合、図3及び図4における回収モードの実行(ステップS13,S42)に代えて停止モードが実行され、制御装置29,39が圧縮機30、室外ファン33、及び室内ファン26等を停止させて、液制御弁35とガス制御弁38とを閉じる。
図5は、回収モードを選択したときの報知の態様を示すテーブルである。前述したように、第1室内機21a及び第2室内機21bのリモコン42では、漏洩センサ27が故障したとき、寿命に達したとき、及び寿命が近づいたときに、これらの異常を示す報知が行われる。図5には、各ケースに応じた報知の具体的な態様が示されている。
第1室内機21aの漏洩センサ27が故障し、第2室内機21bの漏洩センサ27が故障していない場合、第1室内機21aの表示パネル43には、漏洩センサ27の故障を示す異常表示Aが行われ、同時にライト44が発光し、ブザー45が鳴る。このとき、第2室内機21bの表示パネル43には、異常を示すための表示は行われず、ライト44及びブザー45も作動しない。ただし、ユーザ等がリモコン42を操作すると表示パネル43にはエラー表示がなされる。ユーザやサービスマンは、第1室内機21aの報知によって第1室内機21aの漏洩センサ27が故障していることを認識することができる。また、ユーザやサービスマンは、リモコン42を操作した際の第2室内機21bの報知(エラー表示)によって、第2室内機21bに接続された、第2室内機21b以外の他の室内機の漏洩センサ27に異常が発生していることを認識することができる。室内機が2台である場合には、ユーザやサービスマンは、第1室内機21aの報知だけでなく第2室内機21bの報知によっても、第1室内機21aに異常が発生していることを認識することができる。
(1)上記実施形態の冷凍サイクル装置11は、冷媒を循環させる冷媒回路23と、冷媒回路23から漏洩した冷媒を検出する漏洩センサ27とを備え、漏洩センサ27の異常の発生を認識して冷媒回路23中の所定箇所に冷媒を回収する回収モードを、運転モードとして備えている。そのため、漏洩センサ27の交換やその他のメンテナンス等により冷媒回路23から冷媒が漏洩するのを抑制することができる。
21 :室内機
22 :室外機
23 :冷媒回路
25 :室内熱交換器(利用熱交換器)
27 :漏洩センサ
29 :室内制御部(制御装置)
30 :圧縮機
31 :室外熱交換器(熱源熱交換器)
35 :液制御弁
38 :ガス制御弁
39 :室外制御部(制御装置)
40Ga :第1ガス冷媒配管
40Gb :第2ガス冷媒配管
40L :液冷媒配管
43 :表示パネル(報知部)
44 :ライト(報知部)
45 :ブザー(報知部)
T1 :通電積算時間
T2 :通電積算時間
Tth1 :第1閾値
Tth2 :第2閾値
Claims (10)
- 冷媒を循環させる冷媒回路(23)と、前記冷媒回路(23)から漏洩した冷媒を検出する漏洩センサ(27)と、を備え、
前記漏洩センサ(27)の異常の発生を認識して前記冷媒回路(23)中の所定箇所に冷媒を回収する回収モードを、運転モードとして備えている冷凍サイクル装置。 - 前記冷媒回路(23)を制御する制御装置(29,39)をさらに備え、
前記制御装置(29,39)は、前記回収モードを実行する、請求項1に記載の冷凍サイクル装置。 - 前記漏洩センサ(27)の異常の発生を認識して前記冷媒回路(23)における冷媒の流れを停止させる停止モードを、運転モードとしてさらに備え、
前記制御装置(29,39)は、前記停止モードを実行する、請求項2に記載の冷凍サイクル装置。 - 前記制御装置(29,39)が、前記回収モード及び前記停止モードの中から前記漏洩センサ(27)の異常の発生を認識した場合に実行する運転モードの選択を受け付ける、請求項3に記載の冷凍サイクル装置。
- 前記冷媒回路(23)が、熱源熱交換器(31)、利用熱交換器(25)、圧縮機(30)、前記利用熱交換器(25)の液側端と前記熱源熱交換器(31)の液側端とを接続する液冷媒配管(40L)、前記利用熱交換器(25)のガス側端と前記圧縮機(30)の吸入管とを接続する第1ガス冷媒配管(40Ga)、前記熱源熱交換器(31)のガス側端と前記圧縮機(30)の吐出管とを接続する第2ガス冷媒配管(40Gb)、前記液冷媒配管(40L)に設けられた液制御弁(35)、及び、前記第1ガス冷媒配管(40Ga)に設けられたガス制御弁(38)を含み、
前記制御装置(29,39)は、前記回収モードによる運転開始の際に前記液制御弁(35)を閉じかつ前記圧縮機(30)を作動させ、前記回収モードによる運転終了の際に前記ガス制御弁(38)を閉じる、請求項2~4のいずれか1項に記載の冷凍サイクル装置。 - 前記異常が、前記漏洩センサ(27)の故障又は前記漏洩センサ(27)の寿命の到達である、請求項1~5のいずれか1項に記載の冷凍サイクル装置。
- 報知部(43,44,45)をさらに備え、
前記冷凍サイクル装置は、前記漏洩センサ(27)の通電積算時間が所定の第1閾値を超えることで前記漏洩センサ(27)の寿命を認識し、
前記報知部(43,44,45)は、前記通電積算時間が前記第1閾値を超える場合と、前記通電積算時間が前記第1閾値よりも短い所定の第2閾値を超える場合とで、互いに異なる報知を行う、請求項6のいずれか1項に記載の冷凍サイクル装置。 - 前記冷媒回路(23)によって冷媒が循環される室外機(22)と、
前記冷媒回路(23)によって冷媒が循環される第1室内機(21a)及び第2室内機(21b)と、を備え、
前記第1室内機(21a)が、第1漏洩センサ(27)と第1報知部(43,44,45)とを有し、
前記第2室内機(21b)が、第2漏洩センサ(27)と第2報知部(43,44,45)とを有し、
前記第1漏洩センサ(27)に異常が発生し、前記第2漏洩センサ(27)に異常が発生していない場合、前記第1報知部(43,44,45)と、前記第2報知部(43,44,45)とが互いに異なる報知を行う、請求項1~7のいずれか1項に記載の冷凍サイクル装置。 - 第1報知部(43,44,45)と、第2報知部(43,44,45)とは、光、音、及び表示を含む複数の手段のうち、互いに異なる手段による報知、複数の手段の互いに異なる組み合わせによる報知、又は、同一の手段の互いに異なる報知方法による報知を行う、請求項8に記載の冷凍サイクル装置。
- 前記制御装置(29,39)は、前記冷媒回路(23)を冷媒が循環している状態で前記漏洩センサ(27)の異常の発生を認識した場合に、前記冷媒の流れを継続させたまま前記回収モードを実行する、請求項2~5のいずれか1項に記載の冷凍サイクル装置。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4253855A1 (en) * | 2022-03-31 | 2023-10-04 | Panasonic Intellectual Property Management Co., Ltd. | Air conditioner |
US11927377B2 (en) | 2014-09-26 | 2024-03-12 | Waterfurnace International, Inc. | Air conditioning system with vapor injection compressor |
US11953239B2 (en) | 2018-08-29 | 2024-04-09 | Waterfurnace International, Inc. | Integrated demand water heating using a capacity modulated heat pump with desuperheater |
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Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02140574A (ja) | 1988-11-18 | 1990-05-30 | Sanyo Electric Co Ltd | 空気調和装置 |
JPH11142004A (ja) | 1997-11-05 | 1999-05-28 | Daikin Ind Ltd | 冷凍装置 |
JP2000121211A (ja) * | 1998-10-20 | 2000-04-28 | Matsushita Refrig Co Ltd | 冷蔵庫 |
JP2015209979A (ja) | 2014-04-23 | 2015-11-24 | ダイキン工業株式会社 | 空気調和装置 |
WO2017026147A1 (ja) | 2015-08-07 | 2017-02-16 | 三菱電機株式会社 | 冷凍サイクル装置及び冷凍サイクルシステム |
JP2017036890A (ja) * | 2015-08-11 | 2017-02-16 | ダイキン工業株式会社 | 空調室内機 |
WO2017199373A1 (ja) * | 2016-05-18 | 2017-11-23 | 三菱電機株式会社 | 空気調和機 |
WO2018229921A1 (ja) * | 2017-06-15 | 2018-12-20 | 三菱電機株式会社 | 空気調和機 |
WO2019082242A1 (ja) * | 2017-10-23 | 2019-05-02 | 三菱電機株式会社 | 環境監視装置 |
WO2019116437A1 (ja) * | 2017-12-12 | 2019-06-20 | 日立ジョンソンコントロールズ空調株式会社 | 空気調和機 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014224612A (ja) * | 2011-09-16 | 2014-12-04 | パナソニック株式会社 | 空気調和機 |
WO2018078729A1 (ja) * | 2016-10-25 | 2018-05-03 | 三菱電機株式会社 | 冷凍サイクル装置 |
CN110822760B (zh) * | 2018-08-14 | 2021-06-04 | 奥克斯空调股份有限公司 | 一种空调冷媒系统、冷媒泄漏检测方法及空调 |
-
2020
- 2020-05-20 EP EP20936720.0A patent/EP4155629A4/en active Pending
- 2020-05-20 WO PCT/JP2020/019945 patent/WO2021234857A1/ja unknown
- 2020-05-20 JP JP2022524759A patent/JP7336595B2/ja active Active
- 2020-05-20 AU AU2020449188A patent/AU2020449188B2/en active Active
- 2020-05-20 CN CN202080101138.4A patent/CN115667821A/zh active Pending
-
2022
- 2022-10-26 US US17/973,701 patent/US20230052745A1/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02140574A (ja) | 1988-11-18 | 1990-05-30 | Sanyo Electric Co Ltd | 空気調和装置 |
JPH11142004A (ja) | 1997-11-05 | 1999-05-28 | Daikin Ind Ltd | 冷凍装置 |
JP2000121211A (ja) * | 1998-10-20 | 2000-04-28 | Matsushita Refrig Co Ltd | 冷蔵庫 |
JP2015209979A (ja) | 2014-04-23 | 2015-11-24 | ダイキン工業株式会社 | 空気調和装置 |
WO2017026147A1 (ja) | 2015-08-07 | 2017-02-16 | 三菱電機株式会社 | 冷凍サイクル装置及び冷凍サイクルシステム |
JP6143977B1 (ja) * | 2015-08-07 | 2017-06-07 | 三菱電機株式会社 | 冷凍サイクル装置及び冷凍サイクルシステム |
JP2017036890A (ja) * | 2015-08-11 | 2017-02-16 | ダイキン工業株式会社 | 空調室内機 |
WO2017199373A1 (ja) * | 2016-05-18 | 2017-11-23 | 三菱電機株式会社 | 空気調和機 |
WO2018229921A1 (ja) * | 2017-06-15 | 2018-12-20 | 三菱電機株式会社 | 空気調和機 |
WO2019082242A1 (ja) * | 2017-10-23 | 2019-05-02 | 三菱電機株式会社 | 環境監視装置 |
WO2019116437A1 (ja) * | 2017-12-12 | 2019-06-20 | 日立ジョンソンコントロールズ空調株式会社 | 空気調和機 |
Non-Patent Citations (2)
Title |
---|
"BSI Standards Publication", 31 December 2016, BRITISH STANDARDS INSTITUTION, article ANONYMOUS: "Refrigerating systems and heat pumps - safety and environmental requirements", pages: 1 - 34, XP093136458 |
See also references of EP4155629A4 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11927377B2 (en) | 2014-09-26 | 2024-03-12 | Waterfurnace International, Inc. | Air conditioning system with vapor injection compressor |
US11953239B2 (en) | 2018-08-29 | 2024-04-09 | Waterfurnace International, Inc. | Integrated demand water heating using a capacity modulated heat pump with desuperheater |
EP4253855A1 (en) * | 2022-03-31 | 2023-10-04 | Panasonic Intellectual Property Management Co., Ltd. | Air conditioner |
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