WO2017163321A1 - 冷凍サイクル装置 - Google Patents
冷凍サイクル装置 Download PDFInfo
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- WO2017163321A1 WO2017163321A1 PCT/JP2016/059085 JP2016059085W WO2017163321A1 WO 2017163321 A1 WO2017163321 A1 WO 2017163321A1 JP 2016059085 W JP2016059085 W JP 2016059085W WO 2017163321 A1 WO2017163321 A1 WO 2017163321A1
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- indoor
- refrigerant
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- indoor unit
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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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
- F24F3/00—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
- F24F3/06—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
- F24F3/08—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 with separate supply and return lines for hot and cold heat-exchange fluids i.e. so-called "4-conduit" system
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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
- 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
- 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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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0293—Control issues related to the indoor fan, e.g. controlling 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
- 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
- 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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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25252—Microprocessor
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2614—HVAC, heating, ventillation, climate control
Definitions
- the present invention relates to a refrigeration cycle apparatus including a plurality of indoor units.
- Patent Document 1 describes an air conditioner.
- the air conditioner includes a gas sensor that is provided on the outer surface of the indoor unit and detects a refrigerant, and a control unit that controls the rotation of the indoor fan when the gas sensor detects the refrigerant.
- a gas sensor that detects a refrigerant
- the indoor blower fan is rotated so that the indoor air is sucked from the suction port provided in the housing of the indoor unit, and the air is blown out from the blower outlet to the room. Can be diffused.
- a plurality of indoor units of the air conditioner may be installed separately in a plurality of indoor spaces partitioned from each other by walls or partitions.
- the indoor blower fan of the indoor unit installed in a different indoor space from the indoor space in which the indoor unit in which the refrigerant has leaked is rotated, the room does not contribute to the diffusion of the leaked refrigerant.
- the blower fan is rotated. Accordingly, there is a problem that unnecessary power is consumed.
- the present invention has been made to solve at least one of the above-described problems, and even if the refrigerant leaks, the refrigerant concentration in the indoor space is prevented from becoming locally high.
- An object of the present invention is to provide a refrigeration cycle apparatus capable of preventing unnecessary power consumption.
- the refrigeration cycle apparatus includes a refrigeration cycle circuit having a plurality of load-side heat exchangers, a plurality of indoor units that respectively accommodate the plurality of load-side heat exchangers, and a control that controls the plurality of indoor units.
- Each of the plurality of indoor units includes a blower fan, at least one of the plurality of indoor units includes a refrigerant detection means, and the control unit includes the plurality of indoor units.
- the indoor unit is configured to be set to one or a plurality of groups, and the control unit detects the refrigerant when the refrigerant detection unit includes any of the plurality of indoor units.
- the blower fans included in all the indoor units belonging to the same group as the indoor unit including the refrigerant detection unit are configured to operate.
- the refrigerant concentration in the indoor space can be suppressed from becoming locally high and unnecessary power can be prevented from being consumed.
- FIG. 1 is a refrigerant circuit diagram illustrating a schematic configuration of the air-conditioning apparatus according to the present embodiment.
- the air conditioner has a refrigeration cycle circuit 10 that circulates refrigerant.
- the refrigeration cycle circuit 10 includes, for example, a compressor 3, a refrigerant flow path switching unit 4, a heat source side heat exchanger 5, a plurality of decompression units 6A, 6B, and 6C, and a plurality of load side heat exchangers 7A, 7B, and 7C.
- the set of decompression means 6A and load side heat exchanger 7A, the set of pressure reduction means 6B and load side heat exchanger 7B, and the set of pressure reduction means 6C and load side heat exchanger 7C are parallel to each other in refrigeration cycle circuit 10. It is connected to the.
- the air conditioning apparatus has the outdoor unit 2 installed, for example, outdoors as a heat source unit. Furthermore, the air conditioning apparatus has, for example, a plurality of indoor units 1A, 1B, and 1C installed indoors as load units. The outdoor unit 2 and the indoor units 1A, 1B, and 1C are connected via an extension pipe that is a part of the refrigerant pipe.
- a slightly flammable refrigerant such as HFO-1234yf or HFO-1234ze, or a strong flammable refrigerant such as R290 or R1270 is used.
- These refrigerants may be used as a single refrigerant, or may be used as a mixed refrigerant in which two or more kinds are mixed.
- a refrigerant having a flammability that is equal to or higher than the slight combustion level (for example, 2 L or more in the ASHRAE 34 classification) may be referred to as a “flammable refrigerant”.
- nonflammable refrigerants such as R22 and R410A having nonflammability (for example, 1 in the classification of ASHRAE 34) can also be used. These refrigerants have a density higher than that of air at atmospheric pressure (for example, the temperature is room temperature (25 ° C.)).
- the outdoor unit 2 accommodates at least the heat source side heat exchanger 5.
- the compressor 3 and the refrigerant flow switching means 4 are also accommodated in the outdoor unit 2.
- the outdoor unit 2 accommodates an outdoor fan 8 that supplies outdoor air to the heat source side heat exchanger 5.
- the outdoor fan 8 is installed facing the heat source side heat exchanger 5. By rotating the outdoor blower fan 8, an air flow passing through the heat source side heat exchanger 5 is generated.
- a propeller fan is used as the outdoor blower fan 8.
- the outdoor blower fan 8 is disposed, for example, on the downstream side of the heat source side heat exchanger 5 in the air flow generated by the outdoor blower fan 8.
- the compressor 3 is a fluid machine that compresses sucked low-pressure refrigerant and discharges it as high-pressure refrigerant.
- the refrigerant flow switching means 4 switches the flow direction of the refrigerant in the refrigeration cycle circuit 10 between the cooling operation and the heating operation.
- the heat source side heat exchanger 5 is a heat exchanger that functions as a radiator (for example, a condenser) during cooling operation and functions as an evaporator during heating operation. In the heat source side heat exchanger 5, heat exchange is performed between the refrigerant circulating inside and the outdoor air blown by the outdoor blower fan 8.
- the indoor unit 1A accommodates at least a load-side heat exchanger 7A.
- the decompression means 6A is also accommodated in the indoor unit 1A.
- the indoor unit 1A accommodates an indoor blower fan 9A that supplies air to the load-side heat exchanger 7A.
- the casing of the indoor unit 1A is formed with a suction port that sucks air in the indoor space and a blower outlet that blows air into the indoor space. By rotating the indoor blower fan 9A, air in the indoor space is sucked from the suction port. The sucked air passes through the load-side heat exchanger 7A and is blown out from the outlet to the indoor space.
- a centrifugal fan for example, a sirocco fan or a turbo fan
- a cross flow fan for example, a mixed flow fan
- an axial fan for example, a propeller fan
- the indoor blower fan 9A of this example is disposed upstream of the load side heat exchanger 7A in the air flow generated by the indoor blower fan 9A.
- the indoor blower fan 9A may be disposed on the downstream side of the load-side heat exchanger 7A.
- the decompression means 6A is for decompressing the high-pressure refrigerant to obtain a low-pressure refrigerant.
- the pressure reducing means 6A for example, an electronic expansion valve whose opening degree can be adjusted by the control of the control unit 30 described later is used. Further, as the pressure reducing means 6A, a temperature type expansion valve, a fixed throttle, an expander, or the like may be used.
- the load side heat exchanger 7A is a heat exchanger that functions as an evaporator during cooling operation and functions as a radiator (for example, a condenser) during heating operation. In the load side heat exchanger 7A, heat exchange is performed between the refrigerant circulating in the interior and the air blown by the indoor blower fan 9A.
- the indoor unit 1A is provided with a refrigerant detection means 99A for detecting leakage of the refrigerant.
- the refrigerant detection means 99A is disposed, for example, inside the housing of the indoor unit 1A.
- a gas sensor such as a semiconductor gas sensor or a hot wire semiconductor gas sensor is used.
- the refrigerant detection unit 99A detects, for example, the refrigerant concentration in the air around the refrigerant detection unit 99A, and outputs a detection signal to the control unit 30 described later.
- the controller 30 determines whether or not the refrigerant leaks in the indoor unit 1A based on the detection signal from the refrigerant detection means 99A.
- an oxygen concentration meter may be used, or a temperature sensor (for example, a thermistor) may be used.
- a temperature sensor for example, a thermistor
- the refrigerant detection means 99A detects refrigerant leakage by detecting a decrease in temperature due to adiabatic expansion of the leaked refrigerant.
- the location where the refrigerant may leak in the indoor unit 1A is the brazed portion of the load-side heat exchanger 7A and the joint portion of the refrigerant pipe.
- the refrigerant used in the present embodiment has a density higher than that of air under atmospheric pressure. For this reason, when the refrigerant leaks in the indoor unit 1A, the refrigerant flows downward in the housing of the indoor unit 1A. Therefore, it is desirable that the refrigerant detection means 99A is provided in a position (for example, a lower part in the casing) whose height is lower than the load-side heat exchanger 7A and the joint portion in the casing of the indoor unit 1A. Thereby, in the refrigerant
- an indoor unit such as a floor-standing type, a ceiling cassette type, a ceiling-embedded type, a ceiling-suspended type, or a wall-mounted type is used.
- the indoor units 1B and 1C have the same configuration as the indoor unit 1A, for example. That is, in the indoor units 1B and 1C, similarly to the indoor unit 1A, decompression means 6B and 6C, load side heat exchangers 7B and 7C, and indoor blower fans 9B and 9C are accommodated, respectively. Further, similarly to the indoor unit 1A, the indoor units 1B and 1C are provided with refrigerant detection means 99B and 99C, respectively.
- the control unit 30 (not shown in FIG. 1) has a microcomputer (hereinafter sometimes referred to as “microcomputer”) having a CPU, a ROM, a RAM, an I / O port, and the like.
- the control unit 30 of this example operates the entire air conditioner including the indoor units 1A, 1B, and 1C based on an operation signal from an operation unit (for example, a remote controller) that receives a user operation, a detection signal from sensors, and the like.
- the control unit 30 in this example includes an outdoor unit control unit provided in the outdoor unit 2 and a plurality of indoor units provided in the indoor units 1A, 1B, and 1C, respectively, and capable of communicating with the outdoor unit control unit. And a control unit.
- the outdoor unit control unit mainly controls the operation of the outdoor unit 2.
- the indoor unit control unit mainly controls the operations of the indoor units 1A, 1B, and 1C.
- the refrigerant flow path switching means 4 switches the refrigerant flow path as shown by the solid line in FIG. 1 so that the low-temperature and low-pressure refrigerant flows through the load side heat exchangers 7A, 7B, 7C. Is configured.
- the heat source side heat exchanger 5 functions as a condenser. That is, in the heat source side heat exchanger 5, heat exchange is performed between the refrigerant circulating in the interior and the outdoor air supplied by the outdoor blower fan 8, and the heat of condensation of the refrigerant is radiated to the outdoor air. Thereby, the refrigerant flowing into the heat source side heat exchanger 5 is condensed and becomes a high-pressure liquid refrigerant.
- the high-pressure liquid refrigerant that has flowed out of the heat source side heat exchanger 5 flows into the decompression means 6A, 6B, and 6C of the indoor units 1A, 1B, and 1C via the extension pipe, and is decompressed to become a low-pressure two-phase refrigerant. .
- the low-pressure two-phase refrigerant flowing out from the decompression means 6A, 6B, 6C flows into the load side heat exchangers 7A, 7B, 7C.
- the load side heat exchangers 7A, 7B and 7C function as an evaporator.
- the load-side heat exchangers 7A, 7B, and 7C heat exchange is performed between the refrigerant that circulates inside and the air (for example, indoor air) that is supplied by the indoor blower fans 9A, 9B, and 9C.
- the heat of evaporation is absorbed from the air.
- the refrigerant that has flowed into the load-side heat exchangers 7A, 7B, and 7C evaporates to become a low-pressure gas refrigerant or a two-phase refrigerant with high dryness.
- the air supplied by the indoor blower fans 9A, 9B, 9C is cooled by the heat absorbing action of the refrigerant.
- the low-pressure gas refrigerant or the high-dryness two-phase refrigerant that has flowed out of the load-side heat exchangers 7A, 7B, and 7C is sucked into the compressor 3 via the extension pipe and the refrigerant flow path switching means 4.
- the refrigerant sucked into the compressor 3 is compressed into a high-temperature and high-pressure gas refrigerant. In the cooling operation, the above cycle is repeated.
- FIG. 1 the flow direction of the refrigerant during the heating operation is indicated by a dotted arrow.
- the refrigerant flow path switching means 4 switches the refrigerant flow path as indicated by the dotted line in FIG. 1 so that the high-temperature and high-pressure refrigerant flows through the load side heat exchangers 7A, 7B, 7C. Is configured.
- the high-temperature and high-pressure gas refrigerant discharged from the compressor 3 flows into the load-side heat exchangers 7A, 7B, and 7C of the indoor units 1A, 1B, and 1C via the refrigerant flow switching unit 4 and the extension pipe.
- the load side heat exchangers 7A, 7B, and 7C function as condensers. That is, in the load-side heat exchangers 7A, 7B, and 7C, heat exchange is performed between the refrigerant circulating in the interior and the air supplied by the indoor blower fans 9A, 9B, and 9C, and the heat of condensation of the refrigerant is radiated to the air. Is done.
- the refrigerant that has flowed into the load-side heat exchangers 7A, 7B, and 7C is condensed and becomes a high-pressure liquid refrigerant.
- the high-pressure liquid refrigerant condensed in the load-side heat exchangers 7A, 7B, 7C flows into the decompression means 6A, 6B, 6C and is decompressed to become a low-pressure two-phase refrigerant.
- the low-pressure two-phase refrigerant that has flowed out from the decompression means 6A, 6B, 6C flows into the heat source side heat exchanger 5 of the outdoor unit 2 through the extension pipe.
- the heat source side heat exchanger 5 functions as an evaporator.
- the refrigerant that has flowed into the heat source side heat exchanger 5 evaporates to become a low-pressure gas refrigerant or a two-phase refrigerant with high dryness.
- Low-pressure gas refrigerant or high-dryness two-phase refrigerant that has flowed out of the heat source side heat exchanger 5 is sucked into the compressor 3 via the refrigerant flow switching means 4.
- the refrigerant sucked into the compressor 3 is compressed into a high-temperature and high-pressure gas refrigerant. In the heating operation, the above cycle is repeated.
- the air conditioner of the present embodiment is a so-called individual operation multi-type air conditioner in which all the indoor units 1A, 1B, and 1C operate in an operation mode independent of each other.
- each of the indoor units 1A, 1B, and 1C performs the cooling operation or stops independently of each other.
- each of the indoor units 1A, 1B, and 1C performs the heating operation or stops independently of each other. That is, in the individually operated multi-type air conditioner, only some of the indoor units 1A, 1B, and 1C can be operated.
- the cooling operation and the heating operation cannot be mixed in the indoor units 1A, 1B, and 1C.
- the cooling operation and the heating are performed in the indoor units 1A, 1B, and 1C. It is also possible to mix driving.
- FIG. 2 is a diagram illustrating an example of an installation state of the indoor units 1A, 1B, and 1C in the air-conditioning apparatus according to the present embodiment.
- FIG. 3 is a diagram illustrating another example of the installation state of the indoor units 1A, 1B, and 1C in the air-conditioning apparatus according to the present embodiment.
- FIG. 4 is a diagram illustrating still another example of the installation state of the indoor units 1A, 1B, and 1C in the air-conditioning apparatus according to the present embodiment.
- the indoor units 1A, 1B, and 1C are a ceiling cassette type, a ceiling-embedded type, a ceiling-suspended type, or a wall-hanging type. There may be.
- one indoor unit 1A, 1B, 1C is installed in each of a plurality of indoor spaces a, b, c partitioned by walls or partitions. It is common to be done. However, even with an individually operated multi-type air conditioner, a plurality of indoor units can be installed in a single indoor space without partitions.
- the indoor units 1A and 1B are installed in one indoor space a
- the indoor unit 1C is installed in an indoor space b partitioned from the indoor space a.
- all the indoor units 1A, 1B, 1C are installed in one indoor space a.
- FIG. 5 is a block diagram illustrating a configuration of the control unit 30 of the air-conditioning apparatus according to the present embodiment.
- a remote controller 20A that accepts a user operation on indoor unit 1A
- a remote controller 20B that accepts a user operation on indoor unit 1B
- a remote controller 20C that accepts a user operation on indoor unit 1C.
- the control unit 30 is mounted on the indoor unit 1A and is installed in the indoor unit 1C, the indoor unit control unit 31A that controls the indoor unit 1A, the indoor unit control unit 31B that is mounted on the indoor unit 1B and controls the indoor unit 1B, and the indoor unit 1C.
- the indoor unit control unit 31C that controls the indoor unit 1C, the outdoor unit control unit 32 that is mounted on the outdoor unit 2 and controls the outdoor unit 2, and the remote control unit 33A that is mounted on the remote control 20A and controls the remote control 20A.
- a remote control unit 33B that is mounted on the remote control 20B and controls the remote control 20B, and a remote control unit 33C that is mounted on the remote control 20C and controls the remote control 20C.
- the indoor unit control unit 31A includes a control board 40A and a control board 41A that can communicate with the control board 40A via a control line.
- the indoor unit control unit 31A can communicate with the indoor unit control unit 31B, the indoor unit control unit 31C, the outdoor unit control unit 32, and the remote control units 33A, 33B, and 33C via control lines.
- a microcomputer 50A that mainly controls the operation of the indoor unit 1A is mounted on the control board 40A.
- refrigerant detection means 99A for example, a heat ray semiconductor gas sensor
- a microcomputer 51A that mainly controls the refrigerant detection means 99A are mounted in a non-detachable manner.
- the refrigerant detection means 99A of this example is directly mounted on the control board 41A, but the refrigerant detection means 99A only needs to be detachably connected to the control board 41A.
- the refrigerant detection means 99A may be provided at a position away from the control board 41A, and the wiring from the refrigerant detection means 99A may be connected to the control board 41A by soldering or the like.
- the control board 41A is provided separately from the control board 40A. However, the control board 41A may be omitted and the refrigerant detection means 99A may be detachably connected to the control board 40A.
- the indoor unit control units 31B and 31C have the same configuration as the indoor unit control unit 31A. That is, the indoor unit control units 31B and 31C respectively include control boards 40B and 40C on which the microcomputers 50B and 50C are mounted, and control boards 41B and 41C on which the microcomputers 51B and 51C and the refrigerant detection means 99B and 99C are mounted. Have.
- the outdoor unit control unit 32 has a control board 42.
- a microcomputer 52 that mainly controls the operation of the outdoor unit 2 is mounted on the control board 42.
- the remote controller 33A has a control board 43A.
- a microcomputer 53A that mainly controls the remote controller 20A is mounted on the control board 43A.
- the remote control units 33B and 33C have the same configuration as the remote control unit 33A. That is, the remote control units 33B and 33C have control boards 43B and 43C on which microcomputers 53B and 53C are mounted, respectively.
- the indoor unit control units 31A, 31B, and 31C, the outdoor unit control unit 32, and the remote control units 33A, 33B, and 33C can communicate with each other.
- the indoor unit control unit 31A is connected to each of the outdoor unit control unit 32 and the remote control unit 33A via control lines.
- Indoor unit control part 31A, 31B, 31C is connected to the bus type via the control line.
- the indoor unit control units 31B and 31C are connected to the remote control units 33B and 33C through control lines, respectively.
- the microcomputers 51A, 51B, and 51C have rewritable nonvolatile memories (for example, flash memories).
- the nonvolatile memory is provided with a leakage history bit (an example of a leakage history storage area) that stores a history of refrigerant leakage.
- the leakage history bits of the microcomputers 51A, 51B, 51C can be set to “0” or “1”.
- the initial value of this leakage history bit is “0”. That is, in the case of the new microcomputers 51A, 51B, 51C and the microcomputers 51A, 51B, 51C having no refrigerant leakage history, the leakage history bit is set to “0”.
- the leakage history bit of the microcomputer 51A is changed from “0” to “1” when the refrigerant detection unit 99A detects the leakage of the refrigerant (for example, when the refrigerant concentration detected by the refrigerant detection unit 99A is equal to or higher than the threshold concentration). Will be rewritten.
- the leakage history bits of the microcomputers 51B and 51C are rewritten from “0” to “1” when the refrigerant detection means 99B and 99C detect refrigerant leakage, respectively.
- the leakage history bits of the microcomputers 51A, 51B, and 51C can be irreversibly rewritten only in one direction from “0” to “1”. Further, the leakage history bits of the microcomputers 51A, 51B, and 51C are maintained regardless of whether or not power is supplied to the microcomputers 51A, 51B, and 51C.
- a first leakage history bit corresponding to the leakage history bit of the microcomputer 51A and the microcomputer 51B The second leakage history bit corresponding to the leakage history bit of the microcomputer 51C and the third leakage history bit corresponding to the leakage history bit of the microcomputer 51C are provided.
- the first to third leakage history bits of each of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C can be set to “0” or “1”.
- the first to third leakage history bits of each of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C can be rewritten bidirectionally between “0” and “1”.
- the value of the first leakage history bit of each of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C is set to the same value as the leakage history bit of the microcomputer 51A acquired by communication.
- the value of the second leakage history bit of each of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C is set to the same value as the leakage history bit of the microcomputer 51B acquired by communication.
- the value of the third leakage history bit of each of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C is set to the same value as the leakage history bit of the microcomputer 51C acquired by communication.
- the first to third leakage history bits of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C are restarted even if the power supply is cut off and returned to the initial value (eg, “0”). Then, the same value as the leakage history bit of the microcomputers 51A, 51B, 51C is set again.
- control unit 30 is configured to set a plurality of indoor units 1A, 1B, 1C to one or a plurality of groups.
- One or a plurality of groups are created for each indoor space, for example, and indoor units installed in the same indoor space are set to the same group.
- the control unit 30 The indoor unit 1A is set to group A, the indoor unit 1B is set to group B, and the indoor unit 1C is set to group C.
- the indoor unit 1C is set to group C.
- the control unit 30 sets the indoor units 1A and 1B to group A.
- the indoor unit 1C is set to group B.
- the control unit 30 sets all the indoor units 1A, 1B, 1C to one group A. To do.
- the group setting operation is performed, for example, by a special operation of the remote controllers 20A, 20B, and 20C by a user or an air conditioner installation operator.
- the set group information is stored in the microcomputer of each indoor unit control unit 31A, 31B, 31C in association with the first to third leakage history bits.
- a dip switch may be provided as an operation unit dedicated to group setting on each control board of the indoor unit control units 31A, 31B, and 31C or each control board of the remote control units 33A, 33B, and 33C.
- the indoor unit control unit 31A of the indoor unit 1A determines that the indoor unit 1B corresponding to the second leakage history bit belongs to the same group as the indoor unit 1A, and the indoor unit 1C corresponding to the third leakage history bit is the indoor unit 1A. Recognize that they belong to different groups.
- the indoor unit control unit 31B of the indoor unit 1B is configured so that the indoor unit 1A corresponding to the first leakage history bit belongs to the same group as the indoor unit 1B, and the indoor unit 1C corresponding to the third leakage history bit is different from the indoor unit 1B. Recognize that it belongs to the group.
- both the indoor unit 1A corresponding to the first leakage history bit and the indoor unit 1B corresponding to the second leakage history bit belong to different groups different from the indoor unit 1C. Recognize
- the indoor unit control unit 31A Regardless of the value of the third leakage history bit (that is, the leakage history bit corresponding to the indoor unit 1C belonging to other than the group A), the normal control of the indoor unit 1A is performed.
- the indoor unit 1A in this state performs a normal driving operation and a stopping operation based on the operation of the remote controller 20A or the like.
- the indoor unit control unit 31A forces the indoor blower fan 9A regardless of the value of the third leakage history bit. Control to drive. That is, if the indoor unit 1A is in operation, the operation of the indoor blower fan 9A is continued, and if the indoor unit 1A is stopped, the operation of the indoor blower fan 9A is started. The operation of the indoor blower fan 9A is continued as long as one of the first and second leakage history bits of the microcomputer 50A continues to be set to “1”, for example.
- the indoor unit control unit 31B When both the first and second leakage history bits of the microcomputer 50B are set to “0”, the indoor unit control unit 31B performs normal control of the indoor unit 1B regardless of the value of the third leakage history bit. .
- the indoor unit 1B in this state performs a normal driving operation and a stopping operation based on the operation of the remote controller 20B or the like.
- the indoor unit control unit 31B forces the indoor blower fan 9B regardless of the value of the third leakage history bit. Control to drive.
- the operation of the indoor blower fan 9B is continued, and if the indoor unit 1B is stopped, the operation of the indoor blower fan 9B is started.
- the operation of the indoor fan 9B is continued as long as one of the first and second leakage history bits of the microcomputer 50B continues to be set to “1”, for example.
- the indoor unit control unit 31C When the third leakage history bit of the microcomputer 50C (that is, the leakage history bit corresponding to the indoor unit 1C belonging to the group B) is set to “0”, the indoor unit control unit 31C first and second leakage history Regardless of the value of the bit (that is, the leakage history bit corresponding to the indoor units 1A and 1B belonging to other than the group B), the normal control of the indoor unit 1C is performed.
- the indoor unit 1C in this state performs a normal driving operation and a stopping operation based on the operation of the remote controller 20C and the like.
- the indoor unit control unit 31C performs control to forcibly operate the indoor blower fan 9C regardless of the values of the first and second leakage history bits. I do. That is, if the indoor unit 1C is in operation, the operation of the indoor blower fan 9C is continued, and if the indoor unit 1C is stopped, the operation of the indoor blower fan 9C is started. The operation of the indoor blower fan 9C is continued as long as the third leakage history bit of the microcomputer 50C continues to be set to “1”, for example.
- the outdoor unit control unit 32 performs normal control of the outdoor unit 2 when the first to third leakage history bits of the microcomputer 52 are all set to “0”. On the other hand, when any one of the first to third leakage history bits of the microcomputer 52 is set to “1”, the outdoor unit control unit 32 performs, for example, control for stopping the compressor 3 or operation of the compressor 3. Prohibit control. These controls are continued as long as any one of the first to third leakage history bits of the microcomputer 52 continues to be set to “1”.
- the remote controller 33A When the first to third leakage history bits of the microcomputer 53A are all set to “0”, the remote controller 33A performs normal control of the remote controller 20A. On the other hand, when any one of the first to third leakage history bits of the microcomputer 53A is set to “1”, the remote controller control unit 33A sets an abnormality type or a treatment method on the display unit provided in the remote controller 20A, for example. Information to be included (for example, a text message such as “refrigerant leakage. At this time, the remote control unit 33A may display information on the refrigerant leakage location on the display unit based on which of the first to third leakage history bits is set to “1”.
- the remote controller control unit 33A may cause the audio output unit provided in the remote controller 20A to notify the information including the abnormality type, the treatment method, or the refrigerant leak location by voice.
- the remote control unit 33B performs normal control of the remote controller 20B when the first to third leakage history bits of the microcomputer 53B are all set to “0”. On the other hand, when any one of the first to third leakage history bits of the microcomputer 53B is set to “1”, the remote controller control unit 33B sets an abnormality type or a treatment method on the display unit provided in the remote controller 20B, for example. Displays the information that it contains. At this time, the remote control unit 33B may display information on the refrigerant leakage location on the display unit based on which of the first to third leakage history bits is set to “1”. These displays are continued as long as any one of the first to third leakage history bits of the microcomputer 53B is continuously set to “1”. In addition, the remote controller 33B may cause the audio output unit provided in the remote controller 20B to notify the user of information including the abnormality type, the treatment method, or the refrigerant leakage location.
- the remote controller 33C performs normal control of the remote controller 20C when the first to third leakage history bits of the microcomputer 53C are all set to “0”. On the other hand, when any one of the first to third leakage history bits of the microcomputer 53C is set to “1”, the remote controller control unit 33C sets an abnormality type or treatment method on the display unit provided in the remote controller 20C, for example. Displays the information that it contains. At this time, the remote control unit 33C may display information on the refrigerant leakage location on the display unit based on which of the first to third leakage history bits is set to “1”. These displays are continued as long as any one of the first to third leakage history bits of the microcomputer 53C is continuously set to “1”. In addition, the remote controller control unit 33C may cause the audio output unit provided in the remote controller 20C to inform the user of information including the abnormality type, the treatment method, or the refrigerant leakage location.
- the microcomputer 51A irreversibly rewrites the leakage history bit from the initial value “0” to “1”.
- the leakage history bit of the microcomputer 51A is set to “1”
- the first leakage history bits of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C are also rewritten from “0” to “1”.
- the indoor units 1A and 1B are set to group A and the indoor unit 1C is set to group B, the forced operation of the indoor fan 9A and 9B, the stop of the compressor 3, the Operation prohibition, information display on the respective display units of the remote controllers 20A, 20B, and 20C are performed. Since the indoor unit 1C is set to a group different from the indoor unit 1A, the forced operation of the indoor blower fan 9C is not performed.
- the refrigerant detection unit 99B detects the refrigerant leak.
- the microcomputer 51B irreversibly rewrites the leakage history bit from the initial value “0” to “1”.
- the leakage history bit of the microcomputer 51B is set to “1”
- the second leakage history bits of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C are also rewritten from “0” to “1”.
- the indoor units 1A and 1B are set to group A and the indoor unit 1C is set to group B, the forced operation of the indoor fan 9A and 9B, the stop of the compressor 3, the Operation prohibition, information display on the respective display units of the remote controllers 20A, 20B, and 20C are performed. Since the indoor unit 1C is set to a group different from the indoor unit 1B, the forced operation of the indoor blower fan 9C is not performed.
- the refrigerant detection unit 99C detects the refrigerant leak.
- the microcomputer 51C irreversibly rewrites the leakage history bit from the initial value “0” to “1”.
- the leakage history bit of the microcomputer 51C is set to “1”
- the third leakage history bits of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C are also rewritten from “0” to “1”.
- the indoor fan 9C is forcibly operated, the compressor 3 is stopped, and the compressor 3 is prohibited from operating.
- Information display on the display unit of the remote controller 20 is performed. Since the indoor units 1A and 1B are set in a group different from the indoor unit 1C, the forced operation of the indoor blower fans 9A and 9B is not performed.
- the service person who received the notification from the user replaces the control board 41A, 41B or 41C that has detected the refrigerant leakage with a new one when repairing the refrigerant leakage portion. This is because the leakage history bit of the microcomputer 51A, 51B or 51C is maintained at “1” only by repairing the refrigerant leakage location, and thus the normal operation of the air conditioner cannot be performed. Since the refrigerant detection means 99A, 99B, and 99C are detachably connected to the control boards 41A, 41B, and 41C, respectively, when the control board 41A, 41B, or 41C is replaced, the refrigerant that is exposed to the refrigerant atmosphere is detected. Means 99A, 99B or 99C are also exchanged.
- the leakage history bit of the microcomputer 51A, 51B or 51C mounted on the replaced control board 41A, 41B or 41C is set to “0” which is an initial value. Accordingly, the leakage history bits of the microcomputers 50A, 50B, 50C, 52, 53A, 53B, and 53C are also rewritten from “1” to “0”. Thereby, normal operation
- the refrigerant leakage is detected by the refrigerant detection means 99A of the indoor unit 1A.
- Information that the refrigerant has leaked in the indoor unit 1A is transmitted from the indoor unit control unit 31A to the other indoor unit control units 31B and 31C, the outdoor unit control unit 32, and the remote control units 33A, 33B, and 33C via the control line. Communicated.
- the information that the refrigerant leaked in the indoor unit 1A is not only the indoor unit control unit 31A, but also the other indoor unit control units 31B and 31C, the outdoor unit control unit 32, and the remote control units 33A, 33B, and 33C. Also shared.
- the indoor unit control units 31A, 31B, and 31C each determine whether to forcibly operate the indoor blower fans 9A, 9B, and 9C based on the information that the refrigerant leaked in the indoor unit 1A and the group setting information. to decide.
- the indoor unit controller 31A forces the indoor blower fan 9A because the refrigerant leak occurred in the indoor unit 1A itself, and the indoor unit in which the refrigerant leaked belongs to the same group as the indoor unit 1A. Control to drive.
- the indoor unit control unit 31B performs control to forcibly operate the indoor blower fan 9B because the indoor unit 1A in which refrigerant leakage has occurred belongs to the same group as the indoor unit 1B.
- the indoor unit control unit 31C does not perform control for forcing the indoor fan 9C to perform normal control because the indoor unit 1A in which refrigerant leakage has occurred belongs to a group different from the indoor unit 1C. Do.
- the information that the refrigerant leaked in a certain indoor unit is shared by all the indoor unit control units 31A, 31B, and 31C, but is not limited thereto.
- Information that a refrigerant leak has occurred in an indoor unit is shared only by an indoor unit control unit that controls the indoor unit and an indoor unit control unit that controls indoor units that belong to the same group as the indoor unit, You may make it not share with the indoor unit control part which controls the indoor unit which belongs to a different group from the indoor unit in which the refrigerant
- indoor units belonging to a group different from the indoor unit in which refrigerant leakage has occurred perform normal operation without performing control for forcibly operating the indoor fan, but this is not the only case. Absent. An indoor unit belonging to a group different from the indoor unit in which refrigerant leakage has occurred may not be allowed to perform normal operation without accepting a user's remote control operation. That is, in an indoor unit belonging to a group different from the indoor unit in which refrigerant leakage has occurred, the indoor fan is not forcibly operated, but information indicating that the refrigerant has leaked in an indoor unit is displayed on the display unit of the remote controller. In addition, normal operation cannot be performed. As a result, it is possible to notify a user or the like who is in an indoor space where refrigerant leakage has not occurred that refrigerant leakage has occurred.
- the indoor units 1A, 1B, and 1C when the indoor units 1A, 1B, and 1C are installed as shown in FIG. 2, when the refrigerant leaks in the indoor unit 1A installed in the indoor space a, It is possible to prevent the indoor blower fans 9B and 9C of the indoor units 1B and 1C set in a group different from the unit 1A from operating. Since the indoor units 1B and 1C are installed in the indoor spaces b and c different from the indoor space a, even if the indoor blower fans 9B and 9C are forcibly operated, the refrigerant leaked in the indoor unit 1A is diffused. It is not possible. Therefore, according to the present embodiment, it is possible to prevent the forced operation of the indoor blower fan that does not contribute to the diffusion of the leaked refrigerant, and thus it is possible to prevent unnecessary power from being consumed.
- the indoor space a in which a plurality of indoor units are installed is generally a large space having a large floor area. For this reason, even if only the indoor blower fan 9A of the indoor unit 1A is forcibly operated when the refrigerant leaks in the indoor unit 1A, the air volume necessary for diffusing the leaked refrigerant into the indoor space is obtained. There may not be.
- the indoor blower fan 9A of the indoor unit 1A in which the refrigerant leaks but also other members belonging to the same group as the indoor unit 1A The indoor fan of the indoor unit can also be operated. Thereby, even if the floor space of the indoor space is large, the leaked refrigerant can be sufficiently diffused into the indoor space. Therefore, even if the refrigerant leaks, it can be suppressed that the refrigerant concentration in the indoor space is locally increased.
- the indoor blower fans of all the indoor units belonging to the same group as the indoor unit in which the refrigerant leaks are operated.
- a sudden operation start operation different from the normal operation is performed in one or more indoor units installed in one indoor space. I can inform you. For this reason, measures such as opening a window can be more reliably implemented.
- the refrigerant detection means 99A detects the refrigerant leakage, and the refrigerant leakage history is irreversibly written in the nonvolatile memory of the control board 41A.
- the refrigerant detection means 99A that is detachably connected is also replaced. Therefore, it is possible to prevent the refrigerant detecting means 99A, which has been exposed to the refrigerant atmosphere and whose detection characteristics have changed, from being used continuously.
- the operation of the air conditioner cannot be resumed unless the control board 41A is replaced, the operation of the air conditioner in which the refrigerant leakage point is not repaired is resumed due to human error or intentionally. Can be prevented.
- the air conditioner according to the present embodiment is not limited to the system configuration as shown in FIGS. Hereinafter, modifications of the system configuration of the air conditioner will be described.
- FIG. 6 is a refrigerant circuit diagram illustrating a schematic configuration of an air-conditioning apparatus according to Modification 1 of the present embodiment.
- the air conditioning apparatus according to the present modification has a plurality of outdoor units 2A and 2B.
- the outdoor units 2A and 2B are provided in parallel in the refrigeration cycle circuit 10.
- the outdoor unit 2A accommodates a compressor 3A, a refrigerant flow switching unit 4A, a heat source side heat exchanger 5A, and an outdoor blower fan 8A.
- the outdoor unit 2B accommodates a compressor 3B, a refrigerant flow switching unit 4B, a heat source side heat exchanger 5B, and an outdoor blower fan 8B.
- the outdoor unit control units provided in the outdoor units 2A and 2B are connected to the indoor unit control units 31A, 31B, and 31C and the remote control units 33A, 33B, and 33C so as to communicate with each other.
- Other configurations are the same as those shown in FIGS. Also according to this modification, the same effect as the configuration shown in FIGS. 1 to 5 can be obtained.
- FIG. 7 is a refrigerant circuit diagram illustrating a schematic configuration of an air-conditioning apparatus according to Modification 2 of the present embodiment.
- the air conditioner according to this modification is such that the number of decompression means 6A, 6B, 6C corresponding to the number of indoor units 1A, 1B, 1C is accommodated in the outdoor unit 2. This is different from the configuration shown in FIGS. Other configurations are the same as those shown in FIGS. Also according to this modification, the same effect as the configuration shown in FIGS. 1 to 5 can be obtained.
- FIG. 8 is a refrigerant circuit diagram illustrating a schematic configuration of an air-conditioning apparatus according to Modification 3 of the present embodiment.
- the air conditioner according to this modification is illustrated in that a branch unit 11 interposed between the indoor units 1A, 1B, 1C and the outdoor unit 2 in the refrigeration cycle circuit 10 is provided. 1 to 5 is different from the configuration shown in FIG.
- the branch unit 11 is arranged in a space such as the back of the ceiling, which is a space inside the building but different from the indoor space.
- the refrigerant piping from the outdoor unit 2 branches corresponding to each of the indoor units 1A, 1B, and 1C.
- the branch unit 11 accommodates the number of decompression means 6A, 6B, 6C corresponding to the number of indoor units 1A, 1B, 1C.
- the branch unit 11 may be provided with a control unit for controlling the decompression means 6A, 6B, 6C.
- This control unit is communicably connected to the indoor unit control units 31A, 31B, and 31C, the outdoor unit control unit 32, and the remote control units 33A, 33B, and 33C.
- Other configurations are the same as those shown in FIGS. Also according to this modification, the same effect as the configuration shown in FIGS. 1 to 5 can be obtained.
- FIG. 9 is a refrigerant circuit diagram illustrating a schematic configuration of an air-conditioning apparatus according to Modification 4 of the present embodiment.
- the air conditioner according to the present modification is different from Modification 3 in that it includes a plurality of outdoor units 2A, 2B.
- the other configuration is the same as that of the third modification. Also according to this modification, the same effect as the configuration shown in FIGS. 1 to 5 can be obtained.
- FIG. 10 is a refrigerant circuit diagram illustrating a schematic configuration of an air-conditioning apparatus according to Modification 5 of the present embodiment.
- the air conditioner according to this modification includes a plurality of refrigeration cycle circuits 10A and 10B.
- the refrigeration cycle circuits 10A and 10B are filled with the same refrigerant or different refrigerants.
- a compressor 3A, a refrigerant flow path switching unit 4A, a heat source side heat exchanger 5A, a pressure reducing unit 6A, and a plurality of load side heat exchangers 7A, 7B, 7C are connected in an annular shape via a refrigerant pipe. It has a configuration.
- the load side heat exchangers 7A, 7B, 7C are connected in parallel to each other in the refrigeration cycle circuit 10A.
- the outdoor unit 2A accommodates a compressor 3A, a refrigerant flow switching unit 4A, a heat source side heat exchanger 5A and a decompression unit 6A, and an outdoor fan 8A that supplies outdoor air to the heat source side heat exchanger 5A. ing.
- the indoor units 1A, 1B, and 1C include load-side heat exchangers 7A, 7B, and 7C, indoor blower fans 9A, 9B, and 9C that supply air to the load-side heat exchangers 7A, 7B, and 7C, and refrigerant leakage Refrigerant detection means 99A, 99B, and 99C for detecting the above are respectively accommodated.
- a compressor 3B, a refrigerant flow path switching unit 4B, a heat source side heat exchanger 5B, a pressure reducing unit 6B, and a plurality of load side heat exchangers 7D, 7E, and 7F are connected in a ring shape through a refrigerant pipe. It has a configuration.
- the load side heat exchangers 7D, 7E, and 7F are connected in parallel to each other in the refrigeration cycle circuit 10B.
- the outdoor unit 2B accommodates a compressor 3B, a refrigerant flow switching unit 4B, a heat source side heat exchanger 5B and a pressure reducing unit 6B, and an outdoor fan 8B that supplies outdoor air to the heat source side heat exchanger 5B. ing.
- the indoor units 1D, 1E, and 1F include load-side heat exchangers 7D, 7E, and 7F, indoor blower fans 9D, 9E, and 9F that supply air to the load-side heat exchangers 7D, 7E, and 7F, and refrigerant leakage Refrigerant detection means 99D, 99E, and 99F for detecting the above are respectively accommodated.
- the indoor units 1A, 1B, and 1C are installed, for example, in one indoor space without a partition.
- the indoor units 1D, 1E, and 1F are installed in one indoor space different from the indoor space.
- FIG. 11 is a block diagram illustrating a configuration of the control unit 30 of the air-conditioning apparatus according to the present modification.
- the indoor units 1A, 1B, and 1C connected to the refrigeration cycle circuit 10A and the indoor units 1D, 1E, and 1F connected to the refrigeration cycle circuit 10B are one remote controller. 20 is used for operation.
- the refrigeration cycle circuit 10A constitutes a so-called simultaneous operation multi-type air conditioner in which the indoor units 1A, 1B, and 1C operate in the same operation mode.
- the operation pattern of the refrigeration cycle circuit 10A is, for example, a first operation pattern in which the indoor units 1A, 1B, and 1C all perform a cooling operation, and a second operation in which all the indoor units 1A, 1B, and 1C perform a heating operation. It is either a pattern or a third operation pattern in which all of the indoor units 1A, 1B, and 1C are stopped.
- the refrigeration cycle circuit 10B constitutes a simultaneous operation multi-type air conditioner in which the indoor units 1D, 1E, and 1F operate in the same operation mode.
- the operation pattern of the refrigeration cycle circuit 10B is, for example, a first operation pattern in which the indoor units 1D, 1E, and 1F all perform a cooling operation, and a second operation in which all the indoor units 1D, 1E, and 1F perform a heating operation. It is either a pattern or a third operation pattern in which all of the indoor units 1D, 1E, and 1F are stopped.
- the refrigeration cycle circuit 10 ⁇ / b> A and the refrigeration cycle circuit 10 ⁇ / b> B can be operated in an independent operation pattern by operating the remote controller 20. In this modification, one remote controller 20 is provided.
- a remote controller that receives operations on the indoor units 1A, 1B, and 1C connected to the refrigeration cycle circuit 10A, and indoor units 1D and 1E connected to the refrigeration cycle circuit 10B. And a remote controller that receives an operation for 1F may be provided.
- the control unit 30 is mounted on the indoor unit 1A and is installed in the indoor unit 1C, the indoor unit control unit 31A that controls the indoor unit 1A, the indoor unit control unit 31B that is mounted on the indoor unit 1B and controls the indoor unit 1B, and the indoor unit 1C.
- the indoor unit control unit 31C that controls the indoor unit 1C, the outdoor unit control unit 32A that is mounted on the outdoor unit 2A and controls the outdoor unit 2A, and the indoor unit that is mounted on the indoor unit 1D and controls the indoor unit 1D
- the outdoor unit control unit 32B that controls the outdoor unit 2B and the remote control unit 33 that is mounted on the remote control 20 and controls the remote control 20 are provided.
- the indoor unit control unit 31A includes a control board 40A on which the microcomputer 50A is mounted, and a control board 41A on which the microcomputer 51A and the refrigerant detection means 99A are mounted.
- the indoor unit control units 31B, 31C, 31D, 31E, and 31F include control boards 40B, 40C, 40D, 40E, and 40F on which microcomputers 50B, 50C, 50D, 50E, and 50F are mounted, and microcomputers 51B, 51C, 51D, 51E, 51F and control boards 41B, 41C, 41D, 41E, 41F on which refrigerant detection means 99B, 99C, 99D, 99E, 99F are mounted, respectively.
- the microcomputers 51A, 51B, 51C, 51D, 51E, and 51F have rewritable nonvolatile memories.
- This nonvolatile memory is provided with a leakage history bit (an example of a leakage history storage area) as described above.
- the outdoor unit control unit 32A has a control board 42A on which a microcomputer 52A is mounted.
- the outdoor unit controller 32B has a control board 42B on which a microcomputer 52B is mounted.
- the remote controller 33 has a control board 43 on which a microcomputer 53 is mounted.
- the indoor unit control units 31A, 31B, 31C, 31D, 31E, 31F, the outdoor unit control units 32A, 32B, and the remote control unit 33 are connected to each other via a control line so as to communicate with each other.
- the leakage history bit of the microcomputer 51A is rewritten from “0” to “1” when the refrigerant detection means 99A detects refrigerant leakage.
- the leakage history bits of the microcomputers 51B, 51C, 51D, 51E, and 51F change from “0” to “1” when the refrigerant detection means 99B, 99C, 99D, 99E, and 99F detect refrigerant leakage, respectively.
- the leakage history bits of the microcomputers 51A, 51B, 51C, 51D, 51E, and 51F can be irreversibly rewritten only in one direction from “0” to “1”.
- leakage history bits of the microcomputers 51A, 51B, 51C, 51D, 51E, and 51F are maintained regardless of whether or not power is supplied to the microcomputers 51A, 51B, 51C, 51D, 51E, and 51F.
- the first leakage history bit corresponding to the leakage history bit of the microcomputer 51A A second leakage history bit corresponding to the leakage history bit of the microcomputer 51B, a third leakage history bit corresponding to the leakage history bit of the microcomputer 51C, and a fourth leakage history bit corresponding to the leakage history bit of the microcomputer 51D; A fifth leakage history bit corresponding to the leakage history bit of the microcomputer 51E and a sixth leakage history bit corresponding to the leakage history bit of the microcomputer 51F are provided.
- the first to sixth leakage history bits of each of the microcomputers 50A, 50B, 50C, 50E, 50D, 50F, 52A, 52B, and 53 can be set to “0” or “1”. Can be rewritten in both directions.
- the value of the first leakage history bit of each of the microcomputers 50A, 50B, 50C, 50E, 50D, 50F, 52A, 52B, and 53 is set to the same value as the leakage history bit of the microcomputer 51A acquired by communication.
- the values of the second to sixth leakage history bits of each of the microcomputers 50A, 50B, 50C, 50E, 50D, 50F, 52A, 52B, 53 are the microcomputers 51B, 51C, 51D, 51E, It is set to the same value as the leakage history bit of 51F. Even if the first to sixth leakage history bits of the microcomputers 50A, 50B, 50C, 50E, 50D, 50F, 52A, 52B, 53 are restored to their initial values (eg, “0”) after the power supply is cut off. When the power supply is resumed, the leakage history bits of the microcomputers 51A, 51B, 51C, 51D, 51E, and 51F are set to the same value again.
- control unit 30 includes a set of indoor units 1A, 1B, and 1C constituting the simultaneous operation multi-type air conditioner, and an indoor unit 1D, 1E, and 1F constituting another simultaneous operation multi-type air conditioner.
- the set is set to one or a plurality of groups.
- the set of indoor units 1A, 1B, and 1C is installed in one indoor space, and the set of indoor units 1D, 1E, and 1F is installed in another indoor space.
- a set of 1C is set to, for example, group A
- a set of indoor units 1D, 1E, and 1F is set to, for example, group B.
- indoor units 1A, 1B, 1C, 1D, 1E, and 1F are all installed in one indoor space, a set of indoor units 1A, 1B, and 1C and a set of indoor units 1D, 1E, and 1F May be set to one group.
- the first to third leakage history bits of the microcomputer 50A (that is, the leakage history bits corresponding to the indoor units 1A, 1B, and 1C belonging to the group A) are all set to “0”.
- the normal control of the indoor unit 1A is performed regardless of the values of the fourth to sixth leakage history bits (that is, the leakage history bits corresponding to the indoor units 1D, 1E, and 1F belonging to other than the group A).
- the indoor unit 1A in this state performs a normal driving operation and a stopping operation based on the operation of the remote controller 20 or the like.
- the indoor unit control unit 31A causes the indoor blower fan regardless of the values of the fourth to sixth leakage history bits.
- Control to forcibly operate 9A is performed. That is, if the indoor unit 1A is in operation, the operation of the indoor blower fan 9A is continued, and if the indoor unit 1A is stopped, the operation of the indoor blower fan 9A is started. The operation of the indoor blower fan 9A is continued as long as one of the first to third leakage history bits of the microcomputer 50A is continuously set to “1”, for example.
- the indoor unit control units 31B and 31C perform the same control as the indoor unit control unit 31A based on the values of the first to third leakage history bits.
- the fourth to sixth leakage history bits of the microcomputer 50D (that is, the leakage history bits corresponding to the indoor units 1D, 1E, and 1F belonging to the group B) are all set to “0”.
- the normal control of the indoor unit 1D is performed regardless of the values of the first to third leakage history bits (that is, the leakage history bits corresponding to the indoor units 1A, 1B, and 1C belonging to other than the group B).
- the indoor unit 1D in this state performs a normal driving operation and a stopping operation based on the operation of the remote controller 20 or the like.
- the indoor unit control unit 31D causes the indoor blower fan regardless of the values of the first to third leakage history bits. Control to forcibly operate 9D. That is, if the indoor unit 1D is in operation, the operation of the indoor blower fan 9D is continued, and if the indoor unit 1D is stopped, the operation of the indoor blower fan 9D is started. The operation of the indoor fan 9D is continued as long as any of the fourth to sixth leakage history bits of the microcomputer 50D is continuously set to “1”, for example.
- the indoor unit control units 31E and 31F perform the same control as the indoor unit control unit 31D based on the values of the fourth to sixth leakage history bits.
- the outdoor unit control unit 32A When all of the first to third leakage history bits of the microcomputer 52A are set to “0”, the outdoor unit control unit 32A performs normal operation of the outdoor unit 2A regardless of the values of the fourth to sixth leakage history bits. Take control. On the other hand, when any one of the first to third leakage history bits of the microcomputer 52A is set to “1”, the outdoor unit control unit 32A, for example, compresses regardless of the values of the fourth to sixth leakage history bits. Control for stopping the machine 3A or control for prohibiting the operation of the compressor 3A is performed. These controls are continued as long as any one of the first to third leakage history bits of the microcomputer 52A continues to be set to “1”.
- the outdoor unit control unit 32B When all of the fourth to sixth leakage history bits of the microcomputer 52B are set to “0”, the outdoor unit control unit 32B performs normal operation of the outdoor unit 2B regardless of the values of the first to third leakage history bits. Take control. On the other hand, when any of the fourth to sixth leakage history bits of the microcomputer 52B is set to “1”, the outdoor unit control unit 32B, for example, compresses regardless of the values of the first to third leakage history bits. Control for stopping the machine 3B or control for prohibiting the operation of the compressor 3B is performed. These controls are continued as long as any of the fourth to sixth leakage history bits of the microcomputer 52B continues to be set to “1”.
- the remote controller 33 performs normal control of the remote controller 20 when the first to sixth leakage history bits of the microcomputer 53 are all set to “0”. On the other hand, when one of the first to sixth leakage history bits of the microcomputer 53 is set to “1”, the remote controller control unit 33 displays, for example, an abnormality type, a treatment method, or an error on a display unit provided in the remote controller 20. Information including the location of refrigerant leakage is displayed. These displays are continued as long as any one of the first to sixth leakage history bits of the microcomputer 53 is continuously set to “1”. In addition, the remote controller control unit 33 may cause the audio output unit provided in the remote controller 20 to notify the information including the abnormality type, the treatment method, or the refrigerant leak location by voice.
- the remote controller 33 sets all of the fourth to sixth leakage history bits to “0” even if any of the first to third leakage history bits of the microcomputer 53 is set to “1”. When being performed, user operations on the indoor units 1D, 1E, and 1F may be received as usual. The remote controller 33 also sets all the first to third leakage history bits to “0” even if any of the fourth to sixth leakage history bits of the microcomputer 53 is set to “1”. When set to, a user operation on the indoor units 1A, 1B, and 1C may be accepted as usual.
- the refrigerant detection unit 99A of the indoor unit 1A detects the refrigerant leak.
- the microcomputer 51A irreversibly rewrites the leakage history bit from the initial value “0” to “1”.
- the leakage history bit of the microcomputer 51A is set to “1”
- the first leakage history bits of the microcomputers 50A, 50B, 50C, 50D, 50E, 50F, 52A, 52B, and 53 are also changed from “0” to “1”. To be rewritten.
- the service person who received the notification from the user replaces the control board 41A that has detected the refrigerant leakage with a new one when repairing the refrigerant leakage portion. This is because the leakage history bit of the microcomputer 51A is maintained at “1” simply by repairing the refrigerant leakage point, and therefore the normal operation of the refrigeration cycle circuit 10A of the air conditioner cannot be performed. It is. Since the refrigerant detection means 99A is detachably connected to the control board 41A, when the control board 41A is exchanged, the refrigerant detection means 99A is also exchanged.
- the leakage history bit of the microcomputer 51A mounted on the replaced control board 41A is set to “0” which is an initial value. Accordingly, the first leakage history bits of the microcomputers 50A, 50B, 50C, 50D, 50E, 50F, 52A, 52B, and 53 are also rewritten from “1” to “0”. Thereby, normal operation
- the indoor unit in which the refrigerant leaks is set to a different group. It is possible to prevent the indoor fan of the indoor unit from being operated. Therefore, according to this modification, it is possible to prevent the forced operation of the indoor fan that does not contribute to the diffusion of the leaked refrigerant, and thus it is possible to prevent unnecessary power consumption.
- FIG. 12 is a refrigerant circuit diagram illustrating a schematic configuration of an air-conditioning apparatus according to Modification 6 of the present embodiment.
- the air conditioner according to this modification is provided with decompression means 6A, 6B, 6C, 6D, 6E, and 6F corresponding to the indoor units 1A, 1B, 1C, 1D, 1E, and 1F, respectively. It has been.
- the decompression means 6A, 6B, 6C, 6D, 6E, 6F are accommodated in the indoor units 1A, 1B, 1C, 1D, 1E, 1F, respectively.
- Indoor unit 1A, 1B, 1C is installed in one indoor space without a partition, for example.
- the indoor units 1D, 1E, and 1F are installed in one indoor space different from the indoor space.
- Indoor units 1A, 1B, and 1C are set to group A, and indoor units 1D, 1E, and 1F are set to group B.
- FIG. 13 is a block diagram illustrating a configuration of the control unit 30 of the air-conditioning apparatus according to the present modification.
- the indoor units 1A, 1B, and 1C connected to the refrigeration cycle circuit 10A and the indoor units 1D, 1E, and 1F connected to the refrigeration cycle circuit 10B are respectively remote controlled 20A. , 20B, 20C, 20D, 20E, and 20F.
- the control unit 30 includes a remote control unit 33A that is mounted on the remote control 20A and controls the remote control 20A, and a remote control A remote control unit 33B mounted on the remote controller 20B for controlling the remote controller 20B, a remote controller controller 33C mounted on the remote controller 20C for controlling the remote controller 20C, a remote controller controller 33D mounted on the remote controller 20D for controlling the remote controller 20D,
- the remote control unit 33E is mounted on the remote control 20E and controls the remote control 20E
- the remote control unit 33F is mounted on the remote control 20F and controls the remote control 20F.
- the remote controller 33A has a control board 43A on which a microcomputer 53A is mounted.
- the remote control units 33B, 33C, 33D, 33E, and 33F have control boards 43B, 43C, 43D, 43E, and 43F on which microcomputers 53B, 53C, 53D, 53E, and 53F are mounted, respectively.
- the indoor unit control units 31A, 31B, 31C, 31D, 31E, 31F, the outdoor unit control units 32A, 32B, and the remote control units 33A, 33B, 33C, 33D, 33E, 33F are connected to one upper control unit 34.
- the host control unit 34 has a control board 44 on which a microcomputer 54 is mounted.
- the host control unit 34 functions as a centralized controller that centrally manages the indoor units 1A, 1B, 1C, 1D, 1E, and 1F. That is, the indoor units 1A, 1B, 1C and the outdoor unit 2A, and the indoor units 1D, 1E, 1F and the outdoor unit 2B constitute one individually operated multi-type air conditioner.
- the memories of the microcomputers 53A, 53B, 53C, 53D, 53E, 53F, and 54 correspond to the leakage history bits of the microcomputer 51A.
- a leakage history bit, a fifth leakage history bit corresponding to the leakage history bit of the microcomputer 51E, and a sixth leakage history bit corresponding to the leakage history bit of the microcomputer 51F are provided.
- FIG. 14 is a refrigerant circuit diagram illustrating a schematic configuration of an air-conditioning apparatus according to Modification 7 of the present embodiment.
- FIG. 15 is a diagram illustrating an example of an installation state of the indoor units 1A, 1B, and 1C in the air-conditioning apparatus according to the present modification.
- the air conditioner according to this modification includes floor-mounted indoor units 1 ⁇ / b> A and 1 ⁇ / b> C and a ceiling cassette type indoor unit 1 ⁇ / b> B.
- the indoor units 1A and 1B are installed in one indoor space a, and the indoor unit 1C is installed in another indoor space b.
- Indoor units 1A and 1B are set to group A, and indoor unit 1C is set to group B.
- the floor-standing indoor units 1A and 1C are provided with refrigerant detection means 99A and 99C, but the ceiling cassette type indoor unit 1B is not provided with refrigerant detection means.
- the refrigerant leakage is detected by the refrigerant detection means 99A of the indoor unit 1A.
- Information that the refrigerant leaked in the indoor unit 1A is shared not only by the control unit of the indoor unit 1A but also by control units of the other indoor units 1B and 1C.
- the control unit of the indoor units 1A, 1B, and 1C determines whether to forcibly operate the indoor blower fans 9A, 9B, and 9C based on the information that the refrigerant leaked in the indoor unit 1A and the group setting information. to decide.
- the control unit of the indoor unit 1A performs control for forcibly operating the indoor blower fan 9A because the refrigerant leak has occurred in the indoor unit 1A itself.
- the control unit of the indoor unit 1B performs control to forcibly operate the indoor blower fan 9B because the indoor unit 1A in which refrigerant leakage has occurred belongs to the same group A as the indoor unit 1B.
- the control unit of the indoor unit 1C does not perform control to forcibly operate the indoor blower fan 9C because the indoor unit 1A in which the refrigerant leaks belongs to a group different from the indoor unit 1C, and performs normal control. I do.
- the indoor blower fans 9A and 9B of all the indoor units 1A and 1B belonging to the group A are forcibly operated, and the indoor units belonging to a group other than the group A
- the forced operation of the 1C indoor fan 9C is not performed. Accordingly, it is possible to prevent the forced operation of the indoor fan that does not contribute to the diffusion of the leaked refrigerant, and thus it is possible to prevent unnecessary power from being consumed.
- the indoor blower fan 9C of the indoor unit 1C belonging to the group B is forcibly operated, and the indoor units 1A and 1B belonging to groups other than the group B are operated.
- the forced operation of the blower fans 9A and 9B is not performed.
- the indoor unit 1B does not detect the refrigerant leak, so the indoor units 1A and 1B belonging to the same group A as the indoor unit 1B
- the blower fans 9A and 9B are not necessarily operated.
- the ceiling cassette type indoor unit 1B is installed at a position where the height from the floor is relatively high, even if the refrigerant leaks in the indoor unit 1B, the leaked refrigerant is lowered to the floor. To spread. Therefore, it is possible to avoid locally increasing the refrigerant concentration without operating the indoor blower fans 9A and 9B.
- the floor-standing indoor unit and the indoor unit such as a ceiling cassette type, a ceiling-embedded type, or a ceiling-mounted type installed at a position where the height from the floor surface is relatively high
- the indoor unit such as a ceiling cassette type, a ceiling embedded type, or a ceiling type may not be provided with the refrigerant detection means.
- the cost of the air conditioner can be reduced while preventing the refrigerant concentration in the indoor space from locally increasing.
- the air-conditioning apparatus (an example of the refrigeration cycle apparatus) according to the present embodiment (including modifications 1 to 7) includes a plurality of load-side heat exchangers 7A, 7B, 7C, 7D, 7E, A plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F that respectively accommodate a plurality of load-side heat exchangers 7A, 7B, 7C, 7D, 7E, and 7F; And a control unit 30 that controls the indoor units 1A, 1B, 1C, 1D, 1E, and 1F.
- Each of the plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F includes indoor air blow fans 9A, 9B, 9C, 9D, 9E, and 9F, and at least one (for example, all) of the plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F is refrigerant detection means 99A that detects refrigerant leakage. , 99B, 99C, 99D, 99 99F, and the control unit 30 is configured to set the plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F to one or a plurality of groups.
- All of the indoor units 1A, 1B, 1C, 1D, 1E, and 1F that belong to the same group as the indoor unit that includes the refrigerant detection unit that detects the refrigerant leakage when the refrigerant detection unit detects the refrigerant leakage. It is comprised so that the indoor ventilation fan which this indoor unit has may be operated.
- the air conditioner according to the present embodiment includes a plurality of refrigeration cycle circuits 10A and 10B each having at least one load side heat exchanger, and load side heat exchangers 7A of the plurality of refrigeration cycle circuits 10A and 10B.
- Control units that control a plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F and a plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F that respectively accommodate 7B, 7C, 7D, 7E, and 7F 30, and each of the plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F has indoor blower fans 9A, 9B, 9C, 9D, 9E, and 9F, and the plurality of indoor units 1A
- At least one (for example, all) of 1B, 1C, 1D, 1E, and 1F includes refrigerant detection means 99A, 99B, 99C, 99D, 99E, and 99F for detecting leakage of the ref
- the control unit 30 includes a plurality of indoor units 1A, 1B, 1C, 1D, 1E, 1F to one or a plurality of groups, and the control unit 30 includes a plurality of indoor units 1A, 1B, 1C,
- the indoor blower fans included in all indoor units belonging to the same group as the indoor unit including the refrigerant detection means that detects refrigerant leakage are provided. It is comprised so that it may drive.
- the indoors belonging to a group different from the indoor unit in which the refrigerant leaks It is possible to prevent the indoor fan of the machine from operating. Accordingly, it is possible to prevent the forced operation of the indoor fan that does not contribute to the diffusion of the leaked refrigerant, and thus it is possible to prevent unnecessary power from being consumed.
- an operation unit for example, the remote controller 20, 20A, 20B, 20C, 20D, 20E, 20F, or a dip switch.
- the group setting of the plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F can be easily and appropriately performed by the user or the like.
- control unit 30 controls the plurality of indoor units 1A, 1B, 1C, 1D, 1E, and 1F, respectively, a plurality of indoor unit control units 31A, 31B, 31C, and 31D.
- the plurality of indoor unit controllers 31A, 31B, 31C, 31D, 31E, 31F includes refrigerant detection means 99A, 99B, 99C, 99D, Control boards 41A, 41B, 41C, 41D, 41E, 41F to which 99E, 99F are detachably connected, and non-volatile memories provided in the control boards 41A, 41B, 41C, 41D, 41E, 41F
- the first information for example, “0” of the leakage history bit
- the state without the refrigerant leakage history and the state with the refrigerant leakage history are displayed.
- a leakage history storage area for storing either one of the second information (for example, “1” of the leakage history bit) is provided, and the information stored in the leakage history storage area is determined from the first information.
- the control unit 30 can be changed only in one direction to the second information, and the control unit 30 is a refrigerant detection means provided in at least one of the plurality of indoor unit control units 31A, 31B, 31C, 31D, 31E, and 31F.
- the information stored in the leakage history storage area of the indoor unit control unit that has detected the refrigerant leakage may be changed from the first information to the second information when the refrigerant is detected.
- the control unit 30 stores information stored in at least one of the leakage history storage areas of the plurality of indoor unit control units 31A, 31B, 31C, 31D, 31E, and 31F. Is changed from the first information to the second information, the indoor blower fans of all the indoor units belonging to the same group as the indoor unit corresponding to the leakage history storage area are operated. Also good.
- the leakage history bit is exemplified as the leakage history storage area provided in the nonvolatile memories of the microcomputers 51A, 51B, 51C, 51D, 51E, and 51F.
- a leakage history storage area of 2 bits or more may be provided in the nonvolatile memory.
- the leakage history storage area selectively stores one of first information representing a state without a refrigerant leakage history and second information representing a state with a refrigerant leakage history.
- the information stored in the leakage history storage area can be changed only in one direction from the first information to the second information.
- the information stored in the leakage history storage areas of the microcomputers 51A, 51B, 51C, 51D, 51E, and 51F is obtained when the refrigerant detection means 99A, 99B, 99C, 99D, 99E, and 99F respectively detect refrigerant leakage.
- the information of 1 is changed to the second information.
- the microcomputers 50A, 50B, 50C, 50D, 50E, 50F, 52, 52A, 52B, 53, 53A, 53B, 53C, 53D, 53E, 53F, 54, etc. have their respective microcomputers 51A, 51B, 51C. , 51D, 51E, 51F are provided with first to sixth leakage history storage areas corresponding to the respective leakage history storage areas.
- an air conditioner is taken as an example of a refrigeration cycle apparatus.
- the present invention is not limited to a heat pump water heater (for example, a heat pump apparatus described in JP-A-2016-3783), a chiller, and a showcase. It is applicable also to other refrigeration cycle apparatuses.
- the refrigeration cycle circuits 10, 10A, and 10B to which three or six indoor units are connected are described as examples.
- the indoor units connected to the refrigeration cycle circuits 10, 10A, and 10B are exemplified. Any number may be used.
- the refrigeration cycle circuit 10, 10A, 10B to which one or two outdoor units were connected was mentioned as an example, of the outdoor unit connected to the refrigeration cycle circuits 10, 10A, 10B Any number may be used.
- the air conditioning apparatus provided with one refrigeration cycle circuit 10 or two refrigeration cycle circuits 10A and 10B was mentioned as an example, the number of refrigeration cycle circuits may be any number.
- the configuration in which the refrigerant detection means is provided inside the casing of the indoor unit is taken as an example, but if the refrigerant detection means is connected to the control unit of the refrigeration cycle apparatus, the indoor unit It may be provided outside the housing.
- the refrigerant detection means may be provided in the indoor space, or may be provided in the vicinity of the floor surface of the indoor space in consideration that the refrigerant has a density higher than that of air.
- both floor-standing indoor units It is possible to detect leakage of the refrigerant.
- the refrigerant detection means is not necessarily provided in all indoor units.
- an indoor air blowing fan was mentioned as an example in the structure provided in the housing
- an indoor air blowing fan is connected to the control part of a refrigerating cycle device, an indoor unit It may be provided outside the housing.
- each of the plurality of outdoor units includes a blower fan, and at least one (for example, all) of the plurality of outdoor units includes a refrigerant detection unit.
- the control unit is configured to set a plurality of outdoor units in one or a plurality of groups.
- control unit detects refrigerant leakage by the refrigerant detection unit included in any of the plurality of outdoor units
- all the outdoor units belonging to the same group as the outdoor unit including the refrigerant detection unit that detects the refrigerant leakage are It is comprised so that the ventilation fan which has may be operated.
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Abstract
Description
本発明の実施の形態1に係る冷凍サイクル装置について説明する。本実施の形態では、冷凍サイクル装置として、複数台の室内機を備えたマルチ型の空気調和装置を例示している。図1は、本実施の形態に係る空気調和装置の概略構成を示す冷媒回路図である。図1に示すように、空気調和装置は、冷媒を循環させる冷凍サイクル回路10を有している。冷凍サイクル回路10は、例えば、圧縮機3、冷媒流路切替手段4、熱源側熱交換器5、複数の減圧手段6A、6B、6C、及び複数の負荷側熱交換器7A、7B、7Cが冷媒配管を介して環状に接続された構成を有している。減圧手段6A及び負荷側熱交換器7Aの組と、減圧手段6B及び負荷側熱交換器7Bの組と、減圧手段6C及び負荷側熱交換器7Cの組とは、冷凍サイクル回路10において互いに並列に接続されている。また、空気調和装置は、熱源ユニットとして、例えば室外に設置される室外機2を有している。さらに、空気調和装置は、負荷ユニットとして、例えば室内に設置される複数台の室内機1A、1B、1Cを有している。室外機2と室内機1A、1B、1Cとの間は、冷媒配管の一部である延長配管を介して接続されている。
図6は、本実施の形態の変形例1に係る空気調和装置の概略構成を示す冷媒回路図である。図6に示すように、本変形例に係る空気調和装置は、複数台の室外機2A、2Bを有している。室外機2A、2Bは、冷凍サイクル回路10において互いに並列に設けられている。室外機2Aには、圧縮機3A、冷媒流路切替手段4A、熱源側熱交換器5A、室外送風ファン8Aが収容されている。室外機2Bには、圧縮機3B、冷媒流路切替手段4B、熱源側熱交換器5B、室外送風ファン8Bが収容されている。図示は省略しているが、室外機2A、2Bにそれぞれ設けられた室外機制御部は、室内機制御部31A、31B、31C及びリモコン制御部33A、33B、33Cと通信可能に接続されている。これ以外の構成は、図1~図5に示した構成と同様である。本変形例によっても、図1~図5に示した構成と同様の効果が得られる。
図7は、本実施の形態の変形例2に係る空気調和装置の概略構成を示す冷媒回路図である。図7に示すように、本変形例に係る空気調和装置は、室内機1A、1B、1Cの台数に対応した個数の減圧手段6A、6B、6Cが室外機2に収容されている点で、図1~図5に示した構成と異なっている。これ以外の構成は、図1~図5に示した構成と同様である。本変形例によっても、図1~図5に示した構成と同様の効果が得られる。
図8は、本実施の形態の変形例3に係る空気調和装置の概略構成を示す冷媒回路図である。図8に示すように、本変形例に係る空気調和装置は、冷凍サイクル回路10において室内機1A、1B、1Cと室外機2との間に介在する分岐ユニット11が設けられている点で図1~図5に示した構成と異なっている。分岐ユニット11は、例えば、建物の内部ではあるが室内空間とは別の空間である天井裏等の空間に配置される。分岐ユニット11内では、室外機2からの冷媒配管が室内機1A、1B、1Cのそれぞれに対応して分岐している。また、分岐ユニット11内には、室内機1A、1B、1Cの台数に対応した個数の減圧手段6A、6B、6Cが収容されている。図示は省略しているが、分岐ユニット11には、減圧手段6A、6B、6Cを制御する制御部が設けられていてもよい。この制御部は、室内機制御部31A、31B、31C、室外機制御部32及びリモコン制御部33A、33B、33Cと通信可能に接続される。これ以外の構成は、図1~図5に示した構成と同様である。本変形例によっても、図1~図5に示した構成と同様の効果が得られる。
図9は、本実施の形態の変形例4に係る空気調和装置の概略構成を示す冷媒回路図である。図9に示すように、本変形例に係る空気調和装置は、複数台の室外機2A、2Bを有する点で変形例3と異なっている。これ以外の構成は、変形例3の構成と同様である。本変形例によっても、図1~図5に示した構成と同様の効果が得られる。
図10は、本実施の形態の変形例5に係る空気調和装置の概略構成を示す冷媒回路図である。図10に示すように、本変形例に係る空気調和装置は、複数の冷凍サイクル回路10A、10Bを有している。冷凍サイクル回路10A、10Bには、同一の冷媒又は互いに異なる冷媒が充填されている。
図12は、本実施の形態の変形例6に係る空気調和装置の概略構成を示す冷媒回路図である。図12に示すように、本変形例に係る空気調和装置は、室内機1A、1B、1C、1D、1E、1Fにそれぞれ対応して減圧手段6A、6B、6C、6D、6E、6Fが設けられている。減圧手段6A、6B、6C、6D、6E、6Fは、室内機1A、1B、1C、1D、1E、1Fにそれぞれ収容されている。室内機1A、1B、1Cは、例えば、仕切りのない1つの室内空間に設置されている。室内機1D、1E、1Fは、上記室内空間とは別の1つの室内空間に設置されている。室内機1A、1B、1CはグループAに設定されており、室内機1D、1E、1FはグループBに設定されている。
図14は、本実施の形態の変形例7に係る空気調和装置の概略構成を示す冷媒回路図である。図15は、本変形例に係る空気調和装置における室内機1A、1B、1Cの設置状態の一例を示す図である。図14及び図15に示すように、本変形例に係る空気調和装置は、床置形の室内機1A、1Cと天井カセット形の室内機1Bとを有している。室内機1A、1Bは1つの室内空間aに設置され、室内機1Cは別の室内空間bに設置されている。室内機1A、1BはグループAに設定されており、室内機1CはグループBに設定されている。床置形の室内機1A、1Cには冷媒検知手段99A、99Cが設けられているが、天井カセット形の室内機1Bには冷媒検知手段が設けられていない。
本発明は、上記実施の形態に限らず種々の変形が可能である。
例えば、上記実施の形態では、マイコン51A、51B、51C、51D、51E、51Fの不揮発性メモリに設けられる漏洩履歴記憶領域として漏洩履歴ビットを例示したが、これには限られない。不揮発性メモリには、例えば、2ビット以上の漏洩履歴記憶領域が設けられていてもよい。漏洩履歴記憶領域は、冷媒漏洩履歴のない状態を表す第1の情報と、冷媒漏洩履歴のある状態を表す第2の情報と、のいずれか一方を選択的に記憶する。また、漏洩履歴記憶領域に記憶される情報は、第1の情報から第2の情報への一方向にのみ変更可能である。マイコン51A、51B、51C、51D、51E、51Fの漏洩履歴記憶領域に記憶される情報は、それぞれ冷媒検知手段99A、99B、99C、99D、99E、99Fで冷媒の漏洩を検知した場合に、第1の情報から第2の情報に変更される。また、マイコン50A、50B、50C、50D、50E、50F、52、52A、52B、53、53A、53B、53C、53D、53E、53F、54等のそれぞれのメモリには、マイコン51A、51B、51C、51D、51E、51Fのそれぞれの漏洩履歴記憶領域に対応する第1~第6漏洩履歴記憶領域が設けられる。
Claims (5)
- 複数の負荷側熱交換器を有する冷凍サイクル回路と、
前記複数の負荷側熱交換器をそれぞれ収容する複数の室内機と、
前記複数の室内機を制御する制御部と、を備え、
前記複数の室内機のそれぞれは、送風ファンを有しており、
前記複数の室内機のうち少なくとも1つは、冷媒検知手段を備えており、
前記制御部は、前記複数の室内機を1つ又は複数のグループに設定するように構成されており、
前記制御部は、前記複数の室内機のいずれかが備える前記冷媒検知手段で冷媒を検知した場合、冷媒を検知した前記冷媒検知手段を備える室内機と同じグループに属する全ての室内機が有する前記送風ファンを運転させるように構成されている冷凍サイクル装置。 - 少なくとも1つの負荷側熱交換器をそれぞれ有する複数の冷凍サイクル回路と、
前記複数の冷凍サイクル回路の前記負荷側熱交換器をそれぞれ収容する複数の室内機と、
前記複数の室内機を制御する制御部と、を備え、
前記複数の室内機のそれぞれは、送風ファンを有しており、
前記複数の室内機のうち少なくとも1つは、冷媒検知手段を備えており、
前記制御部は、前記複数の室内機を1つ又は複数のグループに設定するように構成されており、
前記制御部は、前記複数の室内機のいずれかが備える前記冷媒検知手段で冷媒を検知した場合、冷媒を検知した前記冷媒検知手段を備える室内機と同じグループに属する全ての室内機が有する前記送風ファンを運転させるように構成されている冷凍サイクル装置。 - 前記複数の室内機を前記1つ又は複数のグループに設定する操作が行われる操作部をさらに備える請求項1又は請求項2に記載の冷凍サイクル装置。
- 前記制御部は、前記複数の室内機をそれぞれ制御する複数の室内機制御部を有しており、
前記複数の室内機制御部のうち少なくとも1つは、前記冷媒検知手段が着脱不能に接続される制御基板と、前記制御基板に備えられた不揮発性メモリと、を有しており、
前記不揮発性メモリには、冷媒漏洩履歴のない状態を表す第1の情報と、冷媒漏洩履歴のある状態を表す第2の情報と、のいずれか一方を記憶する漏洩履歴記憶領域が設けられており、
前記漏洩履歴記憶領域に記憶される情報は、前記第1の情報から前記第2の情報への一方向にのみ変更可能であり、
前記制御部は、前記複数の室内機制御部のうち少なくとも1つが備える前記冷媒検知手段で冷媒を検知したときに、冷媒を検知した前記室内機制御部の前記漏洩履歴記憶領域に記憶される情報を前記第1の情報から前記第2の情報に変更するように構成されている請求項1~請求項3のいずれか一項に記載の冷凍サイクル装置。 - 前記制御部は、前記複数の室内機制御部のうち少なくとも1つの前記漏洩履歴記憶領域に記憶される情報が前記第1の情報から前記第2の情報に変更されたときに、当該漏洩履歴記憶領域に対応する室内機と同じグループに属する全ての室内機が有する前記送風ファンを運転させるように構成されている請求項4に記載の冷凍サイクル装置。
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