WO2021241290A1 - Air-conditioning device - Google Patents

Air-conditioning device Download PDF

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Publication number
WO2021241290A1
WO2021241290A1 PCT/JP2021/018467 JP2021018467W WO2021241290A1 WO 2021241290 A1 WO2021241290 A1 WO 2021241290A1 JP 2021018467 W JP2021018467 W JP 2021018467W WO 2021241290 A1 WO2021241290 A1 WO 2021241290A1
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WO
WIPO (PCT)
Prior art keywords
indoor unit
refrigerant
state
unit
indoor
Prior art date
Application number
PCT/JP2021/018467
Other languages
French (fr)
Japanese (ja)
Inventor
立慈 川端
明広 重田
俊一 橋本
正宣 広田
大 松井
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to EP21813144.9A priority Critical patent/EP4160120A4/en
Publication of WO2021241290A1 publication Critical patent/WO2021241290A1/en

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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
    • 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
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off valves

Definitions

  • the present invention relates to an air conditioner.
  • the indoor unit is provided with a refrigerant leakage sensor for detecting the refrigerant leakage and a display for notifying that the refrigerant leakage has occurred when the refrigerant leakage sensor detects the refrigerant leakage.
  • a refrigerant leakage sensor for detecting the refrigerant leakage
  • a display for notifying that the refrigerant leakage has occurred when the refrigerant leakage sensor detects the refrigerant leakage.
  • the present invention has been made in view of the above points, and among the indoor units connected to the same refrigerant system, it is possible to recognize the state of other indoor units, and the comfort of the user is improved. It is an object of the present invention to provide an air conditioner capable of suppressing a decrease.
  • the air conditioner of the present invention includes an outdoor unit having at least a compressor and a heat source side heat exchanger, a plurality of indoor units having at least a user side heat exchanger and a blower, and the outdoor unit.
  • an air conditioner including a liquid refrigerant pipe and a gas refrigerant pipe connecting the machine and the indoor unit, the liquid refrigerant pipe and the gas refrigerant pipe are provided on the upstream side of the indoor unit of the liquid refrigerant pipe and the gas refrigerant pipe, and the liquid refrigerant is provided.
  • An opening / closing device that shuts off the flow of refrigerant in the piping and the gas refrigerant piping, a refrigerant leakage sensor that detects the leakage of the refrigerant from the indoor unit, and an opening / closing control of the opening / closing device based on the detection signal by the refrigerant leakage sensor.
  • the control device includes a control device for performing the operation, and when the refrigerant leak sensor detects a refrigerant leak in the indoor unit, the control device controls the opening / closing device located on the upstream side of the indoor unit to be closed, and controls the control.
  • the device stops the cooling operation or the heating operation of the indoor unit when the opening / closing device located on the upstream side of the indoor unit is in the closed state and the refrigerant leakage sensor of the indoor unit detects the refrigerant.
  • the opening / closing device located on the upstream side of the indoor unit is closed and the refrigerant leakage sensor of the indoor unit does not detect the refrigerant, the operation of the indoor unit is blown while controlling the refrigerant leakage state. It is characterized in that it is controlled to an operation restricted state in which it is operated or stopped.
  • this specification shall include all the contents of the Japanese patent application / Japanese Patent Application No. 2020-092271 filed on May 27, 2020.
  • the shutoff valves of the liquid refrigerant pipe and the gas refrigerant pipe are closed, and when the operation is stopped, the liquid refrigerant pipe and the gas refrigerant pipe are connected to the same liquid refrigerant pipe and the gas refrigerant pipe. Since the indoor unit is controlled to the operation restricted state, it is possible to suppress the deterioration of the comfort of the user who uses the other indoor unit by blowing the other indoor unit.
  • FIG. 1 is a schematic configuration diagram showing an embodiment of the air conditioner of the present invention.
  • FIG. 2 is a block diagram showing a control configuration of the present embodiment.
  • FIG. 3 is a flowchart showing the operation of the present embodiment.
  • the first invention connects an outdoor unit having at least a compressor and a heat source side heat exchanger, a plurality of indoor units having at least a user side heat exchanger and a blower, the outdoor unit, and the indoor unit.
  • an air conditioner including a liquid refrigerant pipe and a gas refrigerant pipe, the liquid refrigerant pipe and the gas refrigerant pipe are provided on the upstream side of the indoor unit, and the liquid refrigerant pipe and the refrigerant of the gas refrigerant pipe are provided.
  • the opening / closing device for blocking the flow a refrigerant leakage sensor for detecting the leakage of the refrigerant from the indoor unit, and a control device for controlling the opening / closing of the opening / closing device based on the detection signal by the refrigerant leakage sensor are provided.
  • the control device detects the refrigerant leakage of the indoor unit by the refrigerant leakage sensor, the control device controls the opening / closing device located on the upstream side of the indoor unit to be closed, and the control device is on the upstream side of the indoor unit.
  • the refrigerant leakage state is controlled to stop the cooling operation or the heating operation of the indoor unit, and the above-mentioned If the opening / closing device located on the upstream side of the indoor unit is in the closed state and the refrigerant leakage sensor of the indoor unit does not detect the refrigerant, the operation of the indoor unit is set to the operation restriction state of blowing air or stopping the operation. Control.
  • the indoor unit leaks refrigerant
  • the opening / closing device of the liquid refrigerant pipe and the gas refrigerant pipe is closed and the operation is stopped, other liquid refrigerant pipes and other connected to the gas refrigerant pipe are connected. Since the indoor unit is controlled to the operation restricted state, it is possible to suppress the deterioration of the comfort of the user who uses the other indoor unit by blowing the other indoor unit.
  • control device controls the control device to be in an operable state in which any of cooling operation, heating operation, and ventilation operation is performed if the opening / closing device located on the upstream side of the indoor unit is in the open state.
  • control device includes a display unit for confirming the operating state of the indoor unit, and the control device has the display unit such that the indoor unit is in a refrigerant leak state, an operation restricted state, or. Display which state is in the operable state.
  • the control device causes the display unit to display whether the indoor unit is in the refrigerant leakage state, the operation restricted state, or the operable state, so that the administrator cannot perform the air conditioning operation. It is possible to recognize an indoor unit that cannot perform air-conditioning operation but can perform air-conditioning operation and an indoor unit that can perform air-conditioning operation. As a result, after the operation is stopped, the operating state can be promptly transmitted to the user in the space where each indoor unit exists.
  • the plurality of indoor units each include a display unit
  • the control device has a refrigerant leak state and an operable state in the display unit of the indoor unit in a refrigerant leak state.
  • the user of the indoor unit can recognize the indoor unit that cannot be operated by air conditioning and the indoor unit that can be operated by air conditioning. Further, since it is possible to recognize the occurrence state of the refrigerant leakage in the same refrigerant piping system or another refrigerant piping system, it is possible to notify the user of the refrigerant leakage state in the indoor units having a plurality of units.
  • FIG. 1 is a schematic configuration diagram showing an embodiment of an air conditioner according to the present invention.
  • the air conditioner to which the present invention is applied is not limited to this, and various air conditioners can be applied.
  • the air conditioner 1 includes an outdoor unit 10 and a plurality of indoor units 20.
  • the outdoor unit 10 includes, for example, a compressor 11 (see FIG. 2), an outdoor heat exchanger, a four-way valve for switching the refrigerant flow path, and the like.
  • the outdoor unit 10 and the indoor unit 20 include a liquid refrigerant pipe 30 for connecting the compressor of the outdoor unit 10 and the heat exchanger of the indoor unit 20, and a gas refrigerant pipe 32.
  • five rooms A to E are provided as the room in which the indoor unit 20 is installed.
  • One indoor unit 20 is installed in each of room A, room B, room C, and room E. Further, two indoor units 20 are installed in the room D.
  • the liquid refrigerant pipe 30 is branched into a first liquid refrigerant pipe 30a and a second liquid refrigerant pipe 30b on the way.
  • the gas refrigerant pipe 32 is branched into a first gas refrigerant pipe 32a and a second gas refrigerant pipe 32b on the way.
  • the first liquid refrigerant pipe 30a and the first gas refrigerant pipe 32a are connected to the indoor unit 20 in room A, the indoor unit 20 in room B, and the indoor unit 20 in room C, respectively.
  • the second liquid refrigerant pipe 30b and the second gas refrigerant pipe 32b are connected to the two indoor units 20 in the room D and the indoor unit 20 in the room E, respectively.
  • a first liquid shutoff valve 34a as a switchgear is provided in the middle of the first liquid refrigerant pipe 30a.
  • a first gas shutoff valve 36a as a switchgear is provided in the middle of the first gas refrigerant pipe 32a.
  • the first liquid shutoff valve 34a is provided on the upstream side of the room A of the first liquid refrigerant pipe 30a, and the first gas shutoff valve 36a is provided on the upstream side of the room A of the first gas refrigerant pipe 32a.
  • a second liquid shutoff valve 34b as a switchgear and a third liquid shutoff valve 34c as a switchgear are provided in the middle of the second liquid refrigerant pipe 30b.
  • a second gas shutoff valve 36b as a switchgear and a third gas shutoff valve 36c as a switchgear are provided in the middle of the second gas refrigerant pipe 32b.
  • the second liquid shutoff valve 34b is provided on the upstream side of the room D of the second liquid refrigerant pipe 30b, and the second gas shutoff valve 36b is provided on the upstream side of the room D of the second gas refrigerant pipe 32b.
  • the third liquid shutoff valve 34c is provided on the upstream side of the room E of the second liquid refrigerant pipe 30b and on the downstream side of the room D, and the third gas shutoff valve 36c is from the room E of the second gas refrigerant pipe 32b. It is provided on the upstream side and downstream of the room D.
  • each indoor unit 20 is provided with a refrigerant leakage sensor 40.
  • the refrigerant leakage sensor 40 detects the refrigerant leaking from each indoor unit 20, and is provided inside each indoor unit 20 in the present embodiment.
  • the refrigerant leakage sensor 40 may be provided outside the indoor unit 20, or may be provided separately from the remote controller (not shown) for operating the indoor unit 20 installed in the room and the indoor unit 20. It may be provided at a predetermined place inside the room.
  • Each indoor unit 20 includes a display unit 42 including, for example, a liquid crystal display device that performs a predetermined display.
  • the display unit 42 may be provided directly on the indoor unit 20 or, for example, on a remote controller.
  • FIG. 2 is a block diagram showing a control configuration of the present embodiment.
  • the air conditioner 1 includes a centralized controller 50 as a control device.
  • the centralized controller 50 includes a display unit 52 including, for example, a liquid crystal display device for displaying the state of each indoor unit 20.
  • the centralized controller 50 includes, for example, a processor that executes a program such as a CPU or MPU and a memory such as a ROM or RAM, so that the processor reads a control program stored in the memory and executes a process. Various processes are executed by the cooperation of software.
  • the centralized controller 50 controls the compressor 11, the blower 12, the expansion valve 13, the blower 21 of the indoor unit 20, and the expansion valve 22 of the outdoor unit 10 based on the control program.
  • the centralized controller 50 has a first liquid shutoff valve 34a, a second liquid shutoff valve 34b, a third liquid shutoff valve 34c, a first gas shutoff valve 36a, and a first liquid shutoff valve 34a based on the detection signal of the refrigerant leak sensor 40 of each indoor unit 20. 2 Controls the opening and closing of the gas shutoff valve 36b and the third gas shutoff valve 36c. Further, the centralized controller 50 includes a first liquid shutoff valve 34a, a second liquid shutoff valve 34b, a third liquid shutoff valve 34c, a first gas shutoff valve 36a, and a second gas shutoff valve 36b based on the detection signal of the refrigerant leak sensor 40. When the opening / closing control of the third gas shutoff valve 36c is performed, a predetermined display is performed on the display unit 42 of each indoor unit 20 and the display unit 52 of the centralized controller 50.
  • the centralized controller 50 determines whether or not all the liquid shutoff valves and the gas shutoff valves are "open” during operation (ST1). If it is determined that all are "open” (ST1: YES), the centralized controller 50 continues the cooling or heating operation.
  • the centralized controller 50 detects the refrigerant leakage by the refrigerant leakage sensor 40 based on the detection signal of the refrigerant leakage sensor 40.
  • the liquid shutoff valve and the gas shutoff valve corresponding to the above are controlled to be switched to "closed” (ST3).
  • ST3 the refrigerant leakage sensor 40 of the indoor unit 20 of the room A detects the refrigerant leakage, the first liquid shutoff of the first liquid refrigerant pipe 30a and the first gas refrigerant pipe 32a for flowing the refrigerant to the indoor unit 20 of the room A.
  • valve 34a and the gas shutoff valve are switched to "closed” respectively.
  • the refrigerant is not sent to the indoor unit 20 of the room B and the room C, so that the centralized controller 50 operates the indoor unit 20 of the room B and the room C only by blowing air, or stops the operation. To control.
  • the centralized controller 50 turns on the blower 21 of the indoor unit 20 installed in the room where the refrigerant leaks (ST4). This makes it possible to agitate the air in the room where the refrigerant has leaked.
  • the centralized controller 50 displays on the display unit 52 of the centralized controller 50 that the corresponding indoor unit 20 (indoor unit 20 in room A) where the refrigerant has leaked is in the “refrigerant leak state” (ST5). Further, the centralized controller 50 displays the "refrigerant leak state” and "there is an operable indoor unit” on the display unit 42 of the corresponding indoor unit 20 (indoor unit 20 in room A) where the refrigerant has leaked (ST6). ). After that, the centralized controller 50 controls so that the operation of the indoor unit 20 in the room A is stopped (ST7).
  • the centralized controller 50 determines whether or not all the liquid shutoff valves and the gas shutoff valves are “open” (ST1). In the present embodiment, since the first liquid shutoff valve 34a and the first gas shutoff valve 36a are controlled to be “closed” by the above-mentioned operation, all the liquid shutoff valves and the gas shutoff valve are not “open”. (ST1: NO).
  • the centralized controller 50 determines whether or not the corresponding liquid shutoff valve and gas shutoff valve (in this example, the first liquid shutoff valve 34a and the first gas shutoff valve 36a) are "closed” (ST8). If it is determined to be "closed” (ST8: YES), the centralized controller 50 displays the display unit 52 of the centralized controller 50, and the corresponding indoor unit 20 (indoor unit 20 of room B and room C) is "operated”. It is displayed that it is in the restricted state (ST9).
  • the corresponding liquid shutoff valve and gas shutoff valve in this example, the first liquid shutoff valve 34a and the first gas shutoff valve 36a
  • the centralized controller 50 displays "operation" on the display unit 42 of the indoor unit 20 (in this example, the indoor unit 20 of the room B and the room C) in which the liquid shutoff valve and the gas shutoff valve are "closed” due to the leakage of the refrigerant. "Restricted state” and “There is an indoor unit in an operable state” are displayed (ST10). Since the refrigerant is not sent to the indoor unit 20 of the room B and the room C, the centralized controller 50 controls or controls the indoor unit 20 of the room B and the room C by switching to the operation of only blowing air. It is controlled to stop (ST11).
  • the centralized controller 50 When it is determined that the corresponding liquid shutoff valve and gas shutoff valve are not “closed” (ST8: NO), the centralized controller 50 indicates that the indoor unit 20 corresponding to the display unit 52 of the centralized controller 50 is "operable”. Display to that effect (ST12). That is, in this example, the first liquid shutoff valve 34a and the first gas shutoff valve 36a are in the closed state, but the second liquid shutoff valve 34b provided in the second liquid refrigerant pipe 30b and the second gas refrigerant pipe 32b, The second gas shutoff valve 36b, the third liquid shutoff valve 34c, and the third gas shutoff valve 36c are "open". Therefore, the display unit 52 of the centralized controller 50 indicates that the indoor units 20 of the room D and the room E connected to the second liquid refrigerant pipe 30b and the second gas refrigerant pipe 32b are in the “operable state”.
  • the centralized controller 50 displays "operable state” and "there is an indoor unit in a refrigerant leak state” on the display unit 42 of the corresponding indoor unit 20 (in this example, the indoor unit 20 in room D and room E). (ST13). The indoor unit 20 of the room D and the room E continues the operation such as cooling and heating as it is (ST14).
  • the display unit 42 of the indoor unit 20 of the room A has a "refrigerant leak state" and an "inoperable state indoor unit 20". Is displayed, the user of the indoor unit 20 in the room A is in a state where the refrigerant has leaked and is in a state where the other indoor units 20 can be operated (the indoor units 20 in the room D and the room E). It can be recognized that there is.
  • the display unit 42 of the indoor unit 20 of the room B and the room C displays "operation restricted state” and "there is an indoor unit in an operable state (indoor unit 20 of the room D and the room E)".
  • the user of the indoor unit 20 in the room B and the room C is in a restricted state in which only ventilation or operation is stopped due to the leakage of the refrigerant in the other indoor unit 20, and the room is in an operable state in the other indoor unit 20. It can be recognized that there is a machine (room D and room E indoor unit 20).
  • the display unit 42 of the indoor unit 20 of the room D and the room E displays "there is an indoor unit in the operable state" and "there is an indoor unit in the refrigerant leakage state", so that the indoor unit 20 of the room D and the room E is displayed.
  • the user can recognize that the cooling operation, the heating operation, or the blowing operation is possible, and that there is an indoor unit 20 (indoor unit 20 in room A) in a refrigerant leakage state.
  • the liquid refrigerant pipes 30a and 30b and the gas refrigerant pipes 32a and 32b are provided on the upstream side of the indoor unit 20 and are provided on the liquid refrigerant pipes 30a and 30b and the gas refrigerant pipes 32a and 32b.
  • the shutoff valves 34, 36 (opening / closing device) that shut off the flow of the refrigerant, the refrigerant leak sensor 40 that detects the leakage of the refrigerant from the indoor unit 20, and the shutoff valves 34, 36 based on the detection signal by the refrigerant leak sensor 40.
  • a centralized controller 50 for controlling the opening / closing of the indoor unit 20 is provided, and the centralized controller 50 is located on the upstream side of the indoor unit 20 when the refrigerant leakage of the indoor unit 20 is detected by the refrigerant leakage sensor 40.
  • the centralized controller 50 controls the device to be closed, and the centralized controller 50 is the indoor unit when the opening / closing device located on the upstream side of the indoor unit 20 is in the closed state and the refrigerant leakage sensor 40 of the indoor unit 20 detects the refrigerant.
  • the shutoff valves 34 and 36 located on the upstream side of the indoor unit 20 are closed and the refrigerant leakage sensor 40 of the indoor unit 20 detects the refrigerant. If not, the operation of the indoor unit 20 is controlled to the operation restricted state of blowing air operation or stopping.
  • the shutoff valves 34 and 36 of the liquid refrigerant pipes 30a and 30b and the gas refrigerant pipes 32a and 32b are closed and the operation is stopped. Since the other indoor units 20 connected to the 30b and the gas refrigerant pipes 32a and 32b are controlled to the operation restricted state, the comfort of the user who uses the other indoor units 20 by blowing the other indoor units 20. It is possible to suppress the deterioration of sex.
  • the centralized controller 50 can be operated to perform any of cooling operation, heating operation, and ventilation operation when the shutoff valves 34 and 36 located on the upstream side of the indoor unit 20 are in the open state. Control to state.
  • any of the cooling operation, the heating operation, and the blowing operation can be performed without blocking the flow of the refrigerant, and the deterioration of the user's comfort can be suppressed.
  • the centralized controller 50 includes a display unit 52 for confirming the operating state of the indoor unit 20, the centralized controller 50 has a display unit 52, and the indoor unit 20 has a refrigerant leak state. Display whether the operation is restricted or operable.
  • the centralized controller 50 causes the display unit 52 to display whether the indoor unit 20 is in the refrigerant leakage state, the operation restricted state, or the operable state, so that the administrator cannot perform the air conditioning operation.
  • 20 can be recognized as an indoor unit 20 that cannot perform air-conditioning operation but can perform air-conditioning operation, and an indoor unit 20 that can perform air-conditioning operation. As a result, after the operation is stopped, the operating state can be promptly transmitted to the user in the space where each indoor unit 20 exists.
  • the plurality of indoor units 20 each include a display unit 42, and the centralized controller 50 can operate the display unit 42 of the indoor unit 20 in a refrigerant leak state in a refrigerant leak state.
  • the indoor unit 20 in the state is present, the display unit 42 of the indoor unit 20 in the operation restricted state is in the operation restricted state, the indoor unit 20 is in the operable state, and the indoor unit is in the operable state.
  • the display unit 42 of 20 displays that the indoor unit 20 is in an operable state and that the indoor unit 20 is in a refrigerant leak state.
  • the user of the indoor unit 20 can recognize the indoor unit 20 that cannot be operated by air conditioning and the indoor unit 20 that can be operated by air conditioning. Further, since it is possible to recognize the occurrence state of the refrigerant leakage in the same refrigerant piping system or another refrigerant piping system, it is possible to notify the user of the refrigerant leakage state in the indoor units 20 having a plurality of units.
  • the air conditioner according to the present invention when a plurality of indoor units are connected to an outdoor unit and a refrigerant leak is detected in one of the indoor units, a refrigerant leak state or a refrigerant leak state is detected in the other indoor unit. It can be suitably used as an air conditioner capable of recognizing an operating state or the like.
  • Air conditioner 10 Outdoor unit 11 Compressor 12 Blower 13 Expansion valve 20 Indoor unit 21 Blower 22 Expansion valve 30 Liquid refrigerant piping 30a 1st liquid refrigerant piping 30b 2nd liquid refrigerant piping 32 Gas refrigerant piping 32a 1st gas refrigerant piping 32b 2nd gas refrigerant piping 34, 36 shutoff valve 34a 1st liquid shutoff valve 34b 2nd liquid shutoff valve 34c 3rd liquid shutoff valve 36a 1st gas shutoff valve 36b 2nd gas shutoff valve 36c 3rd gas shutoff valve 40 Refrigerant leak sensor 42 Display unit 50 Centralized controller 52 Display unit

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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Abstract

Provided is an air-conditioning device with which the state of other indoor units among indoor units connected to the same refrigerant system can be recognized, and with which a reduction in the comfort of users can be suppressed.　When a refrigerant leak sensor 40 detects a refrigerant leak in an indoor unit 20, a centralized controller 50 carries out a control to close an opening/closing device located upstream from the relevant indoor unit 20. When the opening/closing device located upstream from the indoor unit 20 is in a closed state and the refrigerant leak sensor 40 of the indoor unit 20 is detecting refrigerant, the centralized controller 50 carries out a control to change the state of the indoor unit to a refrigerant leakage state in which the cooling operation or heating operation of the indoor unit 20 is stopped, and when shutoff valves 34, 36 located upstream from the indoor unit 20 are in a closed state and the refrigerant leak sensor 40 of the relevant indoor unit 20 is not detecting refrigerant, the centralized controller carries out a control to change the operation of the relevant indoor unit 20 to a limited operation state in which the indoor unit carries out a blowing operation or is stopped.

Description

空気調和装置Air conditioner
　本発明は、空気調和装置に関するものである。 The present invention relates to an air conditioner.
　従来から、室内機に、冷媒漏洩を検出する冷媒漏洩センサと、冷媒漏洩センサで冷媒の漏洩を検出したときに冷媒漏洩が発生したことを報知する表示器とを設け、各室内機のうち、いずれかの冷媒漏洩センサで冷媒の漏洩を検出したときは、複数の表示器に冷媒の漏洩が発生したことを報知することで、冷媒の漏洩があったことを効果的に使用者に伝達することができ、使用者の安全性を向上させることができる空気調和装置が提案されている（例えば、特許文献１を参照。）。 Conventionally, the indoor unit is provided with a refrigerant leakage sensor for detecting the refrigerant leakage and a display for notifying that the refrigerant leakage has occurred when the refrigerant leakage sensor detects the refrigerant leakage. When any of the refrigerant leak sensors detects a refrigerant leak, it effectively notifies the user that the refrigerant has leaked by notifying multiple indicators that the refrigerant has leaked. An air conditioner that can improve the safety of the user has been proposed (see, for example, Patent Document 1).
特開２０１６－２２３６５０号公報Japanese Unexamined Patent Publication No. 2016-223650
　しかしながら、前記従来の技術においては、複数の部屋に室内機が設置されている場合、冷媒が漏洩した室内機の利用者は冷媒の漏洩を認識することはできるが、同じ冷媒系統に接続された他の室内機については、冷媒が漏洩した状態を認識することができない。そのため、冷媒漏洩により、他の室内機への冷媒供給を停止した場合や、他の室内機の運転が不能になった場合など、他の室内機の利用者は、同じ冷媒系統の運転状態を認識することができない問題があった。 However, in the above-mentioned conventional technique, when the indoor unit is installed in a plurality of rooms, the user of the indoor unit in which the refrigerant leaks can recognize the leakage of the refrigerant, but the indoor unit is connected to the same refrigerant system. For other indoor units, it is not possible to recognize the state in which the refrigerant has leaked. Therefore, when the supply of refrigerant to other indoor units is stopped due to refrigerant leakage, or when the operation of other indoor units becomes impossible, users of other indoor units can operate the same refrigerant system. There was a problem that could not be recognized.
　また、冷媒が漏洩した場合、冷媒が漏洩した室内機の同一の冷媒系統に接続された他の室内機も運転を停止することになるため、利用者は、冷媒漏洩の有無を確認することはできるが、その後の利用者の快適性の低下は避けられないという課題がある。
　本発明は、前記した点に鑑みてなされたものであり、同一の冷媒系統に接続された室内機のうち、他の室内機における状態を認識することができ、かつ、利用者の快適性の低下を抑制することのできる空気調和装置を提供することを目的とする。 In addition, if the refrigerant leaks, other indoor units connected to the same refrigerant system of the indoor unit where the refrigerant leaked will also stop operating, so the user cannot check for refrigerant leakage. However, there is a problem that the subsequent deterioration of user comfort is unavoidable.
The present invention has been made in view of the above points, and among the indoor units connected to the same refrigerant system, it is possible to recognize the state of other indoor units, and the comfort of the user is improved. It is an object of the present invention to provide an air conditioner capable of suppressing a decrease.
　前記目的を達成するため、本発明の空気調和装置は、少なくとも圧縮機と熱源側熱交換器とを有する室外機と、少なくとも利用側熱交換器と送風機とを有する複数の室内機と、前記室外機と、前記室内機とを接続する液冷媒配管およびガス冷媒配管と、を備えた空気調和装置において、前記液冷媒配管および前記ガス冷媒配管の前記室内機より上流側に設けられ、前記液冷媒配管および前記ガス冷媒配管の冷媒の流れを遮断する開閉装置と、前記室内機からの冷媒の漏洩を検知する冷媒漏洩センサと、前記冷媒漏洩センサによる検出信号に基づいて前記開閉装置の開閉制御を行う制御装置と、を備え、前記制御装置は、前記冷媒漏洩センサにより前記室内機の冷媒漏洩を検出した場合に、当該室内機の上流側に位置する前記開閉装置を閉に制御し、前記制御装置は、前記室内機の上流側に位置する前記開閉装置が閉状態でかつ当該室内機の前記冷媒漏洩センサが冷媒を検知している場合は、当該室内機の冷房運転または暖房運転を停止させる冷媒漏洩状態に制御するとともに、前記室内機の上流側に位置する前記開閉装置が閉状態でかつ当該室内機の前記冷媒漏洩センサが冷媒を検知していない場合は、当該室内機の運転を送風運転、または停止させる運転制限状態に制御することを特徴とする。
　なお、この明細書には、２０２０年５月２７日に出願された日本国特許出願・特願２０２０－０９２２７１号の全ての内容が含まれるものとする。 In order to achieve the above object, the air conditioner of the present invention includes an outdoor unit having at least a compressor and a heat source side heat exchanger, a plurality of indoor units having at least a user side heat exchanger and a blower, and the outdoor unit. In an air conditioner including a liquid refrigerant pipe and a gas refrigerant pipe connecting the machine and the indoor unit, the liquid refrigerant pipe and the gas refrigerant pipe are provided on the upstream side of the indoor unit of the liquid refrigerant pipe and the gas refrigerant pipe, and the liquid refrigerant is provided. An opening / closing device that shuts off the flow of refrigerant in the piping and the gas refrigerant piping, a refrigerant leakage sensor that detects the leakage of the refrigerant from the indoor unit, and an opening / closing control of the opening / closing device based on the detection signal by the refrigerant leakage sensor. The control device includes a control device for performing the operation, and when the refrigerant leak sensor detects a refrigerant leak in the indoor unit, the control device controls the opening / closing device located on the upstream side of the indoor unit to be closed, and controls the control. The device stops the cooling operation or the heating operation of the indoor unit when the opening / closing device located on the upstream side of the indoor unit is in the closed state and the refrigerant leakage sensor of the indoor unit detects the refrigerant. When the opening / closing device located on the upstream side of the indoor unit is closed and the refrigerant leakage sensor of the indoor unit does not detect the refrigerant, the operation of the indoor unit is blown while controlling the refrigerant leakage state. It is characterized in that it is controlled to an operation restricted state in which it is operated or stopped.
In addition, this specification shall include all the contents of the Japanese patent application / Japanese Patent Application No. 2020-092271 filed on May 27, 2020.
　本発明によれば、室内機が冷媒漏洩した場合に、液冷媒配管およびガス冷媒配管の遮断弁を閉にして、運転を停止した場合、同一の液冷媒配管およびガス冷媒配管に接続された他の室内機を運転制限状態に制御するので、他の室内機を送風運転することで、他の室内機を利用する利用者の快適性の低下を抑制することができる。 According to the present invention, when the indoor unit leaks refrigerant, the shutoff valves of the liquid refrigerant pipe and the gas refrigerant pipe are closed, and when the operation is stopped, the liquid refrigerant pipe and the gas refrigerant pipe are connected to the same liquid refrigerant pipe and the gas refrigerant pipe. Since the indoor unit is controlled to the operation restricted state, it is possible to suppress the deterioration of the comfort of the user who uses the other indoor unit by blowing the other indoor unit.
図１は、本発明の空気調和装置の実施の形態を示す概略構成図FIG. 1 is a schematic configuration diagram showing an embodiment of the air conditioner of the present invention. 図２は、本実施の形態の制御構成を示すブロック図FIG. 2 is a block diagram showing a control configuration of the present embodiment. 図３は、本実施の形態の動作を示すフローチャートFIG. 3 is a flowchart showing the operation of the present embodiment.
　第１の発明は、少なくとも圧縮機と熱源側熱交換器とを有する室外機と、少なくとも利用側熱交換器と送風機とを有する複数の室内機と、前記室外機と、前記室内機とを接続する液冷媒配管およびガス冷媒配管と、を備えた空気調和装置において、前記液冷媒配管および前記ガス冷媒配管の前記室内機より上流側に設けられ、前記液冷媒配管および前記ガス冷媒配管の冷媒の流れを遮断する開閉装置と、前記室内機からの冷媒の漏洩を検知する冷媒漏洩センサと、前記冷媒漏洩センサによる検出信号に基づいて前記開閉装置の開閉制御を行う制御装置と、を備え、前記制御装置は、前記冷媒漏洩センサにより前記室内機の冷媒漏洩を検出した場合に、当該室内機の上流側に位置する前記開閉装置を閉に制御し、前記制御装置は、前記室内機の上流側に位置する前記開閉装置が閉状態でかつ当該室内機の前記冷媒漏洩センサが冷媒を検知している場合は、当該室内機の冷房運転または暖房運転を停止させる冷媒漏洩状態に制御するとともに、前記室内機の上流側に位置する前記開閉装置が閉状態でかつ当該室内機の前記冷媒漏洩センサが冷媒を検知していない場合は、当該室内機の運転を送風運転、または停止させる運転制限状態に制御する。 The first invention connects an outdoor unit having at least a compressor and a heat source side heat exchanger, a plurality of indoor units having at least a user side heat exchanger and a blower, the outdoor unit, and the indoor unit. In an air conditioner including a liquid refrigerant pipe and a gas refrigerant pipe, the liquid refrigerant pipe and the gas refrigerant pipe are provided on the upstream side of the indoor unit, and the liquid refrigerant pipe and the refrigerant of the gas refrigerant pipe are provided. The opening / closing device for blocking the flow, a refrigerant leakage sensor for detecting the leakage of the refrigerant from the indoor unit, and a control device for controlling the opening / closing of the opening / closing device based on the detection signal by the refrigerant leakage sensor are provided. When the control device detects the refrigerant leakage of the indoor unit by the refrigerant leakage sensor, the control device controls the opening / closing device located on the upstream side of the indoor unit to be closed, and the control device is on the upstream side of the indoor unit. When the opening / closing device located in is closed and the refrigerant leakage sensor of the indoor unit detects the refrigerant, the refrigerant leakage state is controlled to stop the cooling operation or the heating operation of the indoor unit, and the above-mentioned If the opening / closing device located on the upstream side of the indoor unit is in the closed state and the refrigerant leakage sensor of the indoor unit does not detect the refrigerant, the operation of the indoor unit is set to the operation restriction state of blowing air or stopping the operation. Control.
　これによれば、室内機が冷媒漏洩した場合に、液冷媒配管およびガス冷媒配管の開閉装置を閉にして、運転を停止した場合、同一の液冷媒配管およびガス冷媒配管に接続された他の室内機を運転制限状態に制御するので、他の室内機を送風運転することで、他の室内機を利用する利用者の快適性の低下を抑制することができる。 According to this, when the indoor unit leaks refrigerant, when the opening / closing device of the liquid refrigerant pipe and the gas refrigerant pipe is closed and the operation is stopped, other liquid refrigerant pipes and other connected to the gas refrigerant pipe are connected. Since the indoor unit is controlled to the operation restricted state, it is possible to suppress the deterioration of the comfort of the user who uses the other indoor unit by blowing the other indoor unit.
　第２の発明は、前記制御装置は、前記室内機の上流側に位置する前記開閉装置が開状態であれば、冷房運転、暖房運転および送風運転のいずれかを行う運転可能状態に制御する。 According to the second invention, the control device controls the control device to be in an operable state in which any of cooling operation, heating operation, and ventilation operation is performed if the opening / closing device located on the upstream side of the indoor unit is in the open state.
　これによれば、室内機が冷媒漏洩した場合であっても、開閉装置により閉とされていない他の液冷媒配管およびガス冷媒配管に接続された他の室内機では、冷媒の流れを遮断することがなく、冷房運転、暖房運転および送風運転のいずれかを行うことができ、利用者の快適性の低下を抑制することができる。 According to this, even if the indoor unit leaks refrigerant, the flow of the refrigerant is blocked in other indoor units connected to the liquid refrigerant pipe and the gas refrigerant pipe that are not closed by the opening / closing device. It is possible to perform any of cooling operation, heating operation, and ventilation operation without any problem, and it is possible to suppress a decrease in user comfort.
　第３の発明は、前記制御装置は、前記室内機の運転状態を確認するための表示部を備え、前記制御装置は、前記表示部に、前記室内機が、冷媒漏洩状態、運転制限状態または運転可能状態のいずれの状態かを表示させる。 In the third aspect of the invention, the control device includes a display unit for confirming the operating state of the indoor unit, and the control device has the display unit such that the indoor unit is in a refrigerant leak state, an operation restricted state, or. Display which state is in the operable state.
　これによれば、制御装置により、表示部に、室内機が、冷媒漏洩状態、運転制限状態または運転可能状態のいずれの状態かを表示させることで、管理者が、空調運転ができない室内機と、空調運転ができないが送風運転ができる室内機と、空調運転ができる室内機とを認識することができる。その結果、運転停止後、速やかに各室内機が存在する空間の使用者に運転状態を伝達することができる。 According to this, the control device causes the display unit to display whether the indoor unit is in the refrigerant leakage state, the operation restricted state, or the operable state, so that the administrator cannot perform the air conditioning operation. It is possible to recognize an indoor unit that cannot perform air-conditioning operation but can perform air-conditioning operation and an indoor unit that can perform air-conditioning operation. As a result, after the operation is stopped, the operating state can be promptly transmitted to the user in the space where each indoor unit exists.
　第４の発明は、複数の前記室内機は、表示部をそれぞれ備え、前記制御装置は、冷媒漏洩状態の前記室内機の前記表示部に、冷媒漏洩状態であることおよび運転可能状態の前記室内機が存在すること、運転制限状態の前記室内機の前記表示部には、運転制限状態であることおよび運転可能状態の前記室内機が存在すること、運転可能状態の前記室内機の表示部には、運転可能状態であることおよび冷媒漏洩状態の前記室内機が存在すること、をそれぞれ表示させる。 According to a fourth aspect of the present invention, the plurality of indoor units each include a display unit, and the control device has a refrigerant leak state and an operable state in the display unit of the indoor unit in a refrigerant leak state. The presence of the machine, the display unit of the indoor unit in the operation restricted state, the indoor unit in the operation restricted state, the indoor unit in the operable state, and the display unit of the indoor unit in the operable state. Displays that the indoor unit is in an operable state and that the indoor unit is in a refrigerant leak state.
　これによれば、室内機の利用者が、空調運転ができない室内機と、空調運転可能な室内機とを認識することができる。また、同一の冷媒配管系統または他の冷媒配管系統における冷媒漏洩の発生状態を認識することができるため、複数台存在する室内機で冷媒漏洩状態を利用者に知らせることができる。 According to this, the user of the indoor unit can recognize the indoor unit that cannot be operated by air conditioning and the indoor unit that can be operated by air conditioning. Further, since it is possible to recognize the occurrence state of the refrigerant leakage in the same refrigerant piping system or another refrigerant piping system, it is possible to notify the user of the refrigerant leakage state in the indoor units having a plurality of units.
　以下、図面を参照して本発明の実施の形態について図面を参照して説明する。
　図１は、本発明に係る空気調和装置の実施形態を示す概略構成図である。なお、本発明が適用される空気調和装置としては、これに限定されるものではなく、種々の空気調和装置が適用可能である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an embodiment of an air conditioner according to the present invention. The air conditioner to which the present invention is applied is not limited to this, and various air conditioners can be applied.
　図１に示すように、空気調和装置１は、室外機１０と、複数の室内機２０とを備えている。室外機１０には、例えば、圧縮機１１（図２を参照）、室外熱交換器、冷媒流路を切り替える四方弁などが収容されている。
　室外機１０と室内機２０とは、室外機１０の圧縮機と、室内機２０の熱交換器とを接続する液冷媒配管３０と、ガス冷媒配管３２とを備えている。 As shown in FIG. 1, the air conditioner 1 includes an outdoor unit 10 and a plurality of indoor units 20. The outdoor unit 10 includes, for example, a compressor 11 (see FIG. 2), an outdoor heat exchanger, a four-way valve for switching the refrigerant flow path, and the like.
The outdoor unit 10 and the indoor unit 20 include a liquid refrigerant pipe 30 for connecting the compressor of the outdoor unit 10 and the heat exchanger of the indoor unit 20, and a gas refrigerant pipe 32.
　本実施の形態においては、室内機２０が設置される部屋として、部屋ＡからＥまで、５部屋備えた例を示している。
　部屋Ａ、部屋Ｂ、部屋Ｃおよび部屋Ｅには、それぞれ室内機２０が１台ずつ設置されている。また、部屋Ｄには、２台の室内機２０が設置されている。 In the present embodiment, five rooms A to E are provided as the room in which the indoor unit 20 is installed.
One indoor unit 20 is installed in each of room A, room B, room C, and room E. Further, two indoor units 20 are installed in the room D.
　液冷媒配管３０は、途中で第１液冷媒配管３０ａと、第２液冷媒配管３０ｂとに分岐されている。ガス冷媒配管３２は、途中で第１ガス冷媒配管３２ａと、第２ガス冷媒配管３２ｂとに分岐されている。
　第１液冷媒配管３０ａおよび第１ガス冷媒配管３２ａは、部屋Ａの室内機２０、部屋Ｂの室内機２０および部屋Ｃの室内機２０にそれぞれ接続されている。
　第２液冷媒配管３０ｂおよび第２ガス冷媒配管３２ｂは、部屋Ｄの２台の室内機２０および部屋Ｅの室内機２０にそれぞれ接続されている。 The liquid refrigerant pipe 30 is branched into a first liquid refrigerant pipe 30a and a second liquid refrigerant pipe 30b on the way. The gas refrigerant pipe 32 is branched into a first gas refrigerant pipe 32a and a second gas refrigerant pipe 32b on the way.
The first liquid refrigerant pipe 30a and the first gas refrigerant pipe 32a are connected to the indoor unit 20 in room A, the indoor unit 20 in room B, and the indoor unit 20 in room C, respectively.
The second liquid refrigerant pipe 30b and the second gas refrigerant pipe 32b are connected to the two indoor units 20 in the room D and the indoor unit 20 in the room E, respectively.
　第１液冷媒配管３０ａの中途部には、開閉装置としての第１液遮断弁３４ａが設けられている。第１ガス冷媒配管３２ａの中途部には、開閉装置としての第１ガス遮断弁３６ａが設けられている。
　第１液遮断弁３４ａは、第１液冷媒配管３０ａの部屋Ａより上流側に設けられており、第１ガス遮断弁３６ａは、第１ガス冷媒配管３２ａの部屋Ａより上流側に設けられている。
　第２液冷媒配管３０ｂの中途部には、開閉装置としての第２液遮断弁３４ｂおよび開閉装置としての第３液遮断弁３４ｃがそれぞれ設けられている。第２ガス冷媒配管３２ｂの中途部には、開閉装置としての第２ガス遮断弁３６ｂおよび開閉装置としての第３ガス遮断弁３６ｃがそれぞれ設けられている。 A first liquid shutoff valve 34a as a switchgear is provided in the middle of the first liquid refrigerant pipe 30a. A first gas shutoff valve 36a as a switchgear is provided in the middle of the first gas refrigerant pipe 32a.
The first liquid shutoff valve 34a is provided on the upstream side of the room A of the first liquid refrigerant pipe 30a, and the first gas shutoff valve 36a is provided on the upstream side of the room A of the first gas refrigerant pipe 32a. There is.
A second liquid shutoff valve 34b as a switchgear and a third liquid shutoff valve 34c as a switchgear are provided in the middle of the second liquid refrigerant pipe 30b. A second gas shutoff valve 36b as a switchgear and a third gas shutoff valve 36c as a switchgear are provided in the middle of the second gas refrigerant pipe 32b.
　第２液遮断弁３４ｂは、第２液冷媒配管３０ｂの部屋Ｄより上流側に設けられており、第２ガス遮断弁３６ｂは、第２ガス冷媒配管３２ｂの部屋Ｄより上流側に設けられている。
　第３液遮断弁３４ｃは、第２液冷媒配管３０ｂの部屋Ｅより上流側で部屋Ｄより下流側に設けられており、第３ガス遮断弁３６ｃは、第２ガス冷媒配管３２ｂの部屋Ｅより上流側で部屋Ｄより下流側に設けられている。 The second liquid shutoff valve 34b is provided on the upstream side of the room D of the second liquid refrigerant pipe 30b, and the second gas shutoff valve 36b is provided on the upstream side of the room D of the second gas refrigerant pipe 32b. There is.
The third liquid shutoff valve 34c is provided on the upstream side of the room E of the second liquid refrigerant pipe 30b and on the downstream side of the room D, and the third gas shutoff valve 36c is from the room E of the second gas refrigerant pipe 32b. It is provided on the upstream side and downstream of the room D.
　また、各室内機２０には、冷媒漏洩センサ４０が設けられている。冷媒漏洩センサ４０は、各室内機２０から漏洩する冷媒を検出するものであり、本実施の形態においては、各室内機２０の内部に設けられている。
　なお、冷媒漏洩センサ４０は、室内機２０の外部に設けるようにしてもよいし、部屋に設置される室内機２０を操作するためのリモコン（図示せず）や、室内機２０とは別個に部屋の内部の所定箇所に設けるようにしてもよい。
　各室内機２０は、所定の表示を行う、例えば、液晶表示装置などからなる表示部４２を備えている。表示部４２は、室内機２０に直接設ける他、例えば、リモコンに設けるようにしてもよい。 Further, each indoor unit 20 is provided with a refrigerant leakage sensor 40. The refrigerant leakage sensor 40 detects the refrigerant leaking from each indoor unit 20, and is provided inside each indoor unit 20 in the present embodiment.
The refrigerant leakage sensor 40 may be provided outside the indoor unit 20, or may be provided separately from the remote controller (not shown) for operating the indoor unit 20 installed in the room and the indoor unit 20. It may be provided at a predetermined place inside the room.
Each indoor unit 20 includes a display unit 42 including, for example, a liquid crystal display device that performs a predetermined display. The display unit 42 may be provided directly on the indoor unit 20 or, for example, on a remote controller.
　次に、本実施の形態の制御構成について説明する。
　図２は、本実施の形態の制御構成を示すブロック図である。
　図２に示すように、空気調和装置１は、制御装置としての集中コントローラ５０を備えている。集中コントローラ５０は、各室内機２０の状態を表示するための、例えば、液晶表示装置などからなる表示部５２を備えている。 Next, the control configuration of this embodiment will be described.
FIG. 2 is a block diagram showing a control configuration of the present embodiment.
As shown in FIG. 2, the air conditioner 1 includes a centralized controller 50 as a control device. The centralized controller 50 includes a display unit 52 including, for example, a liquid crystal display device for displaying the state of each indoor unit 20.
　集中コントローラ５０は、例えば、ＣＰＵやＭＰＵなどのプログラムを実行するプロセッサおよびＲＯＭ、ＲＡＭなどのメモリを備え、プロセッサが、メモリに記憶された制御プログラムを読み出して処理を実行するように、ハードウェア及びソフトウェアの協働により各種処理を実行する。
　集中コントローラ５０は、制御プログラムに基づいて、室外機１０の圧縮機１１、送風機１２、膨張弁１３、室内機２０の送風機２１、膨張弁２２をそれぞれ制御する。 The centralized controller 50 includes, for example, a processor that executes a program such as a CPU or MPU and a memory such as a ROM or RAM, so that the processor reads a control program stored in the memory and executes a process. Various processes are executed by the cooperation of software.
The centralized controller 50 controls the compressor 11, the blower 12, the expansion valve 13, the blower 21 of the indoor unit 20, and the expansion valve 22 of the outdoor unit 10 based on the control program.
　集中コントローラ５０は、各室内機２０の冷媒漏洩センサ４０の検出信号に基づいて、第１液遮断弁３４ａ、第２液遮断弁３４ｂ、第３液遮断弁３４ｃ、第１ガス遮断弁３６ａ、第２ガス遮断弁３６ｂおよび第３ガス遮断弁３６ｃの開閉制御を行う。
　また、集中コントローラ５０は、冷媒漏洩センサ４０の検出信号に基づく第１液遮断弁３４ａ、第２液遮断弁３４ｂ、第３液遮断弁３４ｃ、第１ガス遮断弁３６ａ、第２ガス遮断弁３６ｂおよび第３ガス遮断弁３６ｃの開閉制御を行った場合に、各室内機２０の表示部４２および集中コントローラ５０の表示部５２に所定の表示を行うように構成されている。 The centralized controller 50 has a first liquid shutoff valve 34a, a second liquid shutoff valve 34b, a third liquid shutoff valve 34c, a first gas shutoff valve 36a, and a first liquid shutoff valve 34a based on the detection signal of the refrigerant leak sensor 40 of each indoor unit 20. 2 Controls the opening and closing of the gas shutoff valve 36b and the third gas shutoff valve 36c.
Further, the centralized controller 50 includes a first liquid shutoff valve 34a, a second liquid shutoff valve 34b, a third liquid shutoff valve 34c, a first gas shutoff valve 36a, and a second gas shutoff valve 36b based on the detection signal of the refrigerant leak sensor 40. When the opening / closing control of the third gas shutoff valve 36c is performed, a predetermined display is performed on the display unit 42 of each indoor unit 20 and the display unit 52 of the centralized controller 50.
　次に、本実施形態の作用について、図３に示すフローチャートを参照して説明する。
　本実施形態においては、集中コントローラ５０は、運転中に、すべての液遮断弁およびガス遮断弁が「開」になっているか否かを判断する（ＳＴ１）。
　すべて「開」になっていると判断した場合には（ＳＴ１：ＹＥＳ）、集中コントローラ５０は、冷房または暖房の運転を継続する。 Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG.
In the present embodiment, the centralized controller 50 determines whether or not all the liquid shutoff valves and the gas shutoff valves are "open" during operation (ST1).
If it is determined that all are "open" (ST1: YES), the centralized controller 50 continues the cooling or heating operation.
　そして、冷媒漏洩センサ４０が冷媒の漏洩を検出した場合は（ＳＴ２：ＹＥＳ）、集中コントローラ５０は、冷媒漏洩センサ４０の検出信号に基づいて、冷媒漏洩センサ４０が冷媒漏洩を検出した室内機２０に該当する液遮断弁およびガス遮断弁を「閉」に切り替えるよう制御する（ＳＴ３）。
　例えば、部屋Ａの室内機２０の冷媒漏洩センサ４０で冷媒漏洩を検出した場合は、部屋Ａの室内機２０に冷媒を流す第１液冷媒配管３０ａおよび第１ガス冷媒配管３２ａの第１液遮断弁３４ａおよびガス遮断弁をそれぞれ「閉」に切り替える。
　これにより、部屋Ｂ、部屋Ｃの室内機２０には、冷媒が送られなくなるので、集中コントローラ５０は、部屋Ｂ、部屋Ｃの室内機２０を送風のみの運転を行うか、運転を停止するように制御する。 When the refrigerant leakage sensor 40 detects the leakage of the refrigerant (ST2: YES), the centralized controller 50 detects the refrigerant leakage by the refrigerant leakage sensor 40 based on the detection signal of the refrigerant leakage sensor 40. The liquid shutoff valve and the gas shutoff valve corresponding to the above are controlled to be switched to "closed" (ST3).
For example, when the refrigerant leakage sensor 40 of the indoor unit 20 of the room A detects the refrigerant leakage, the first liquid shutoff of the first liquid refrigerant pipe 30a and the first gas refrigerant pipe 32a for flowing the refrigerant to the indoor unit 20 of the room A. The valve 34a and the gas shutoff valve are switched to "closed" respectively.
As a result, the refrigerant is not sent to the indoor unit 20 of the room B and the room C, so that the centralized controller 50 operates the indoor unit 20 of the room B and the room C only by blowing air, or stops the operation. To control.
　集中コントローラ５０は、冷媒漏洩した部屋に設置された室内機２０の送風機２１をＯＮにする（ＳＴ４）。これにより、冷媒が漏洩した部屋の空気の撹拌を行うことができる。 The centralized controller 50 turns on the blower 21 of the indoor unit 20 installed in the room where the refrigerant leaks (ST4). This makes it possible to agitate the air in the room where the refrigerant has leaked.
　そして、集中コントローラ５０は、集中コントローラ５０の表示部５２に、冷媒漏洩した該当の室内機２０（部屋Ａの室内機２０）が、「冷媒漏洩状態」である旨の表示を行う（ＳＴ５）。
　さらに、集中コントローラ５０は、冷媒漏洩した該当の室内機２０（部屋Ａの室内機２０）の表示部４２に、「冷媒漏洩状態」および「運転可能状態の室内機あり」の表示を行う（ＳＴ６）。
　その後、集中コントローラ５０は、部屋Ａの室内機２０の運転は停止するように制御する（ＳＴ７）。 Then, the centralized controller 50 displays on the display unit 52 of the centralized controller 50 that the corresponding indoor unit 20 (indoor unit 20 in room A) where the refrigerant has leaked is in the “refrigerant leak state” (ST5).
Further, the centralized controller 50 displays the "refrigerant leak state" and "there is an operable indoor unit" on the display unit 42 of the corresponding indoor unit 20 (indoor unit 20 in room A) where the refrigerant has leaked (ST6). ).
After that, the centralized controller 50 controls so that the operation of the indoor unit 20 in the room A is stopped (ST7).
　冷媒漏洩センサ４０により、冷媒漏洩を検知しない場合には（ＳＴ２：ＮＯ）、集中コントローラ５０は、すべての液遮断弁およびガス遮断弁が「開」であるか否かを判断する（ＳＴ１）。
　本実施の形態においては、前述の動作により、第１液遮断弁３４ａおよび第１ガス遮断弁３６ａが「閉」に制御されているので、すべての液遮断弁およびガス遮断弁が「開」でないと判断される（ＳＴ１：ＮＯ）。 When the refrigerant leakage sensor 40 does not detect the refrigerant leakage (ST2: NO), the centralized controller 50 determines whether or not all the liquid shutoff valves and the gas shutoff valves are “open” (ST1).
In the present embodiment, since the first liquid shutoff valve 34a and the first gas shutoff valve 36a are controlled to be "closed" by the above-mentioned operation, all the liquid shutoff valves and the gas shutoff valve are not "open". (ST1: NO).
　そして、集中コントローラ５０は、該当する液遮断弁およびガス遮断弁（この例では、第１液遮断弁３４ａおよび第１ガス遮断弁３６ａ）が「閉」であるか否か判断する（ＳＴ８）。「閉」であると判断した場合は（ＳＴ８：ＹＥＳ）、集中コントローラ５０は、集中コントローラ５０の表示部５２に、該当の室内機２０（部屋Ｂおよび部屋Ｃの室内機２０）が、「運転制限状態」である旨の表示を行う（ＳＴ９）。 Then, the centralized controller 50 determines whether or not the corresponding liquid shutoff valve and gas shutoff valve (in this example, the first liquid shutoff valve 34a and the first gas shutoff valve 36a) are "closed" (ST8). If it is determined to be "closed" (ST8: YES), the centralized controller 50 displays the display unit 52 of the centralized controller 50, and the corresponding indoor unit 20 (indoor unit 20 of room B and room C) is "operated". It is displayed that it is in the restricted state (ST9).
　さらに、集中コントローラ５０は、冷媒漏洩により液遮断弁およびガス遮断弁が「閉」とされた室内機２０（この例では、部屋Ｂおよび部屋Ｃの室内機２０）の表示部４２に、「運転制限状態」および「運転可能状態の室内機あり」の表示を行う（ＳＴ１０）。
　部屋Ｂおよび部屋Ｃの室内機２０には、冷媒が送られない状態であるので、集中コントローラ５０は、部屋Ｂおよび部屋Ｃの室内機２０を送風のみの運転に切り替えて制御するか、運転を停止するように制御される（ＳＴ１１）。 Further, the centralized controller 50 displays "operation" on the display unit 42 of the indoor unit 20 (in this example, the indoor unit 20 of the room B and the room C) in which the liquid shutoff valve and the gas shutoff valve are "closed" due to the leakage of the refrigerant. "Restricted state" and "There is an indoor unit in an operable state" are displayed (ST10).
Since the refrigerant is not sent to the indoor unit 20 of the room B and the room C, the centralized controller 50 controls or controls the indoor unit 20 of the room B and the room C by switching to the operation of only blowing air. It is controlled to stop (ST11).
　該当の液遮断弁およびガス遮断弁が「閉」でないと判断した場合は（ＳＴ８：ＮＯ）、集中コントローラ５０は、集中コントローラ５０の表示部５２に該当の室内機２０が「運転可能状態」である旨の表示を行う（ＳＴ１２）。
　すなわち、この例では、第１液遮断弁３４ａおよび第１ガス遮断弁３６ａが閉状態であるが、第２液冷媒配管３０ｂおよび第２ガス冷媒配管３２ｂに設けられた第２液遮断弁３４ｂ、第２ガス遮断弁３６ｂ、第３液遮断弁３４ｃおよび第３ガス遮断弁３６ｃは、「開」となっている。そのため、集中コントローラ５０の表示部５２に、第２液冷媒配管３０ｂおよび第２ガス冷媒配管３２ｂに接続された、部屋Ｄおよび部屋Ｅの室内機２０が「運転可能状態」であると表示する。 When it is determined that the corresponding liquid shutoff valve and gas shutoff valve are not "closed" (ST8: NO), the centralized controller 50 indicates that the indoor unit 20 corresponding to the display unit 52 of the centralized controller 50 is "operable". Display to that effect (ST12).
That is, in this example, the first liquid shutoff valve 34a and the first gas shutoff valve 36a are in the closed state, but the second liquid shutoff valve 34b provided in the second liquid refrigerant pipe 30b and the second gas refrigerant pipe 32b, The second gas shutoff valve 36b, the third liquid shutoff valve 34c, and the third gas shutoff valve 36c are "open". Therefore, the display unit 52 of the centralized controller 50 indicates that the indoor units 20 of the room D and the room E connected to the second liquid refrigerant pipe 30b and the second gas refrigerant pipe 32b are in the “operable state”.
　集中コントローラ５０は、該当の室内機２０（この例では、部屋Ｄおよび部屋Ｅの室内機２０）の表示部４２に「運転可能状態」および「冷媒漏洩状態の室内機あり」との表示を行う（ＳＴ１３）。
　部屋Ｄおよび部屋Ｅの室内機２０は、そのまま冷房や暖房などの運転を継続する（ＳＴ１４）。 The centralized controller 50 displays "operable state" and "there is an indoor unit in a refrigerant leak state" on the display unit 42 of the corresponding indoor unit 20 (in this example, the indoor unit 20 in room D and room E). (ST13).
The indoor unit 20 of the room D and the room E continues the operation such as cooling and heating as it is (ST14).
　このように制御することにより、部屋Ａの室内機２０で冷媒漏洩が発生した場合、部屋Ａの室内機２０の表示部４２には、「冷媒漏洩状態」および「運転可能状態の室内機２０あり」と表示されることで、部屋Ａの室内機２０の利用者は、冷媒が漏洩した状態、および他の室内機２０に運転可能状態の室内機２０（部屋Ｄおよび部屋Ｅの室内機２０）があることを、認識することができる。 By controlling in this way, when a refrigerant leak occurs in the indoor unit 20 of the room A, the display unit 42 of the indoor unit 20 of the room A has a "refrigerant leak state" and an "inoperable state indoor unit 20". Is displayed, the user of the indoor unit 20 in the room A is in a state where the refrigerant has leaked and is in a state where the other indoor units 20 can be operated (the indoor units 20 in the room D and the room E). It can be recognized that there is.
　また、部屋Ｂおよび部屋Ｃの室内機２０の表示部４２には、「運転制限状態」および「運転可能状態の室内機（部屋Ｄおよび部屋Ｅの室内機２０）あり」と表示されることで、部屋Ｂおよび部屋Ｃの室内機２０の利用者は、他の室内機２０の冷媒漏洩により、送風のみあるいは運転停止される制限状態であること、および他の室内機２０に運転可能状態の室内機（部屋Ｄおよび部屋Ｅの室内機２０）があることを、認識することができる。 Further, the display unit 42 of the indoor unit 20 of the room B and the room C displays "operation restricted state" and "there is an indoor unit in an operable state (indoor unit 20 of the room D and the room E)". , The user of the indoor unit 20 in the room B and the room C is in a restricted state in which only ventilation or operation is stopped due to the leakage of the refrigerant in the other indoor unit 20, and the room is in an operable state in the other indoor unit 20. It can be recognized that there is a machine (room D and room E indoor unit 20).
　さらに、部屋Ｄおよび部屋Ｅの室内機２０の表示部４２には、「運転可能状態」および「冷媒漏洩状態の室内機あり」の表示されることで、部屋Ｄおよび部屋Ｅの室内機２０の利用者は、冷房運転、暖房運転または送風運転が可能な状態であること、冷媒漏洩状態の室内機２０（部屋Ａの室内機２０）があることを認識することができる。 Further, the display unit 42 of the indoor unit 20 of the room D and the room E displays "there is an indoor unit in the operable state" and "there is an indoor unit in the refrigerant leakage state", so that the indoor unit 20 of the room D and the room E is displayed. The user can recognize that the cooling operation, the heating operation, or the blowing operation is possible, and that there is an indoor unit 20 (indoor unit 20 in room A) in a refrigerant leakage state.
　以上説明したように、本実施形態によれば、液冷媒配管３０ａ，３０ｂおよびガス冷媒配管３２ａ，３２ｂの室内機２０より上流側に設けられ、液冷媒配管３０ａ，３０ｂおよびガス冷媒配管３２ａ，３２ｂの冷媒の流れを遮断する遮断弁３４，３６（開閉装置）と、室内機２０からの冷媒の漏洩を検知する冷媒漏洩センサ４０と、冷媒漏洩センサ４０による検出信号に基づいて遮断弁３４，３６の開閉制御を行う集中コントローラ５０（制御装置）と、を備え、集中コントローラ５０は、冷媒漏洩センサ４０により室内機２０の冷媒漏洩を検出した場合に、当該室内機２０の上流側に位置する開閉装置を閉に制御し、集中コントローラ５０は、室内機２０の上流側に位置する開閉装置が閉状態でかつ当該室内機２０の冷媒漏洩センサ４０が冷媒を検知している場合は、当該室内機２０の冷房運転または暖房運転を停止させる冷媒漏洩状態に制御するとともに、室内機２０の上流側に位置する遮断弁３４，３６が閉状態でかつ当該室内機２０の冷媒漏洩センサ４０が冷媒を検知していない場合は、当該室内機２０の運転を送風運転、または停止させる運転制限状態に制御する。 As described above, according to the present embodiment, the liquid refrigerant pipes 30a and 30b and the gas refrigerant pipes 32a and 32b are provided on the upstream side of the indoor unit 20 and are provided on the liquid refrigerant pipes 30a and 30b and the gas refrigerant pipes 32a and 32b. The shutoff valves 34, 36 (opening / closing device) that shut off the flow of the refrigerant, the refrigerant leak sensor 40 that detects the leakage of the refrigerant from the indoor unit 20, and the shutoff valves 34, 36 based on the detection signal by the refrigerant leak sensor 40. A centralized controller 50 (control device) for controlling the opening / closing of the indoor unit 20 is provided, and the centralized controller 50 is located on the upstream side of the indoor unit 20 when the refrigerant leakage of the indoor unit 20 is detected by the refrigerant leakage sensor 40. The centralized controller 50 controls the device to be closed, and the centralized controller 50 is the indoor unit when the opening / closing device located on the upstream side of the indoor unit 20 is in the closed state and the refrigerant leakage sensor 40 of the indoor unit 20 detects the refrigerant. While controlling the refrigerant leakage state to stop the cooling operation or heating operation of the indoor unit 20, the shutoff valves 34 and 36 located on the upstream side of the indoor unit 20 are closed and the refrigerant leakage sensor 40 of the indoor unit 20 detects the refrigerant. If not, the operation of the indoor unit 20 is controlled to the operation restricted state of blowing air operation or stopping.
　これにより、室内機２０が冷媒漏洩した場合に、液冷媒配管３０ａ，３０ｂおよびガス冷媒配管３２ａ，３２ｂの遮断弁３４，３６を閉にして、運転を停止した場合、同一の液冷媒配管３０ａ，３０ｂおよびガス冷媒配管３２ａ，３２ｂに接続された他の室内機２０を運転制限状態に制御するので、他の室内機２０を送風運転することで、他の室内機２０を利用する利用者の快適性の低下を抑制することができる。 As a result, when the indoor unit 20 leaks refrigerant, the shutoff valves 34 and 36 of the liquid refrigerant pipes 30a and 30b and the gas refrigerant pipes 32a and 32b are closed and the operation is stopped. Since the other indoor units 20 connected to the 30b and the gas refrigerant pipes 32a and 32b are controlled to the operation restricted state, the comfort of the user who uses the other indoor units 20 by blowing the other indoor units 20. It is possible to suppress the deterioration of sex.
　また、本実施形態によれば、集中コントローラ５０は、室内機２０の上流側に位置する遮断弁３４，３６が開状態であれば、冷房運転、暖房運転および送風運転のいずれかを行う運転可能状態に制御する。 Further, according to the present embodiment, the centralized controller 50 can be operated to perform any of cooling operation, heating operation, and ventilation operation when the shutoff valves 34 and 36 located on the upstream side of the indoor unit 20 are in the open state. Control to state.
　これにより、室内機２０が冷媒漏洩した場合であっても、遮断弁３４，３６により閉とされていない他の液冷媒配管３０ａ，３０ｂおよびガス冷媒配管３２ａ，３２ｂに接続された他の室内機２０では、冷媒の流れを遮断することがなく、冷房運転、暖房運転および送風運転のいずれかを行うことができ、利用者の快適性の低下を抑制することができる。 As a result, even if the indoor unit 20 leaks refrigerant, the other indoor units connected to the other liquid refrigerant pipes 30a and 30b and the gas refrigerant pipes 32a and 32b that are not closed by the shutoff valves 34 and 36. In No. 20, any of the cooling operation, the heating operation, and the blowing operation can be performed without blocking the flow of the refrigerant, and the deterioration of the user's comfort can be suppressed.
　また、本実施形態によれば、集中コントローラ５０は、室内機２０の運転状態を確認するための表示部５２を備え、集中コントローラ５０は、表示部５２に、室内機２０が、冷媒漏洩状態、運転制限状態または運転可能状態のいずれの状態かを表示させる。 Further, according to the present embodiment, the centralized controller 50 includes a display unit 52 for confirming the operating state of the indoor unit 20, the centralized controller 50 has a display unit 52, and the indoor unit 20 has a refrigerant leak state. Display whether the operation is restricted or operable.
　これにより、集中コントローラ５０により、表示部５２に、室内機２０が、冷媒漏洩状態、運転制限状態または運転可能状態のいずれの状態かを表示させることで、管理者が、空調運転ができない室内機２０と、空調運転ができないが送風運転ができる室内機２０と、空調運転ができる室内機２０とを認識することができる。その結果、運転停止後、速やかに各室内機２０が存在する空間の使用者に運転状態を伝達することができる。 As a result, the centralized controller 50 causes the display unit 52 to display whether the indoor unit 20 is in the refrigerant leakage state, the operation restricted state, or the operable state, so that the administrator cannot perform the air conditioning operation. 20 can be recognized as an indoor unit 20 that cannot perform air-conditioning operation but can perform air-conditioning operation, and an indoor unit 20 that can perform air-conditioning operation. As a result, after the operation is stopped, the operating state can be promptly transmitted to the user in the space where each indoor unit 20 exists.
　また、本実施形態によれば、複数の室内機２０は、表示部４２をそれぞれ備え、集中コントローラ５０は、冷媒漏洩状態の室内機２０の表示部４２に、冷媒漏洩状態であることおよび運転可能状態の室内機２０が存在すること、運転制限状態の室内機２０の前記表示部４２には、運転制限状態であることおよび運転可能状態の室内機２０が存在すること、運転可能状態の室内機２０の表示部４２には、運転可能状態であることおよび冷媒漏洩状態の室内機２０が存在すること、をそれぞれ表示させる。 Further, according to the present embodiment, the plurality of indoor units 20 each include a display unit 42, and the centralized controller 50 can operate the display unit 42 of the indoor unit 20 in a refrigerant leak state in a refrigerant leak state. The indoor unit 20 in the state is present, the display unit 42 of the indoor unit 20 in the operation restricted state is in the operation restricted state, the indoor unit 20 is in the operable state, and the indoor unit is in the operable state. The display unit 42 of 20 displays that the indoor unit 20 is in an operable state and that the indoor unit 20 is in a refrigerant leak state.
　これにより、室内機２０の利用者が、空調運転ができない室内機２０と、空調運転可能な室内機２０とを認識することができる。また、同一の冷媒配管系統または他の冷媒配管系統における冷媒漏洩の発生状態を認識することができるため、複数台存在する室内機２０で冷媒漏洩状態を利用者に知らせることができる。 As a result, the user of the indoor unit 20 can recognize the indoor unit 20 that cannot be operated by air conditioning and the indoor unit 20 that can be operated by air conditioning. Further, since it is possible to recognize the occurrence state of the refrigerant leakage in the same refrigerant piping system or another refrigerant piping system, it is possible to notify the user of the refrigerant leakage state in the indoor units 20 having a plurality of units.
　なお、本発明は前記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で、種々変更が可能である。 The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
　以上のように、本発明に係る空気調和装置は、室外機に対して複数の室内機を接続し、いずれかの室内機で冷媒漏洩を検出した場合に、他の室内機で冷媒漏洩状態や運転状態などを認識することができる空気調和装置として好適に利用可能である。 As described above, in the air conditioner according to the present invention, when a plurality of indoor units are connected to an outdoor unit and a refrigerant leak is detected in one of the indoor units, a refrigerant leak state or a refrigerant leak state is detected in the other indoor unit. It can be suitably used as an air conditioner capable of recognizing an operating state or the like.
　１　空気調和装置
　１０　室外機
　１１　圧縮機
　１２　送風機
　１３　膨張弁
　２０　室内機
　２１　送風機
　２２　膨張弁
　３０　液冷媒配管
　３０ａ　第１液冷媒配管
　３０ｂ　第２液冷媒配管
　３２　ガス冷媒配管
　３２ａ　第１ガス冷媒配管
　３２ｂ　第２ガス冷媒配管
　３４，３６　遮断弁
　３４ａ　第１液遮断弁
　３４ｂ　第２液遮断弁
　３４ｃ　第３液遮断弁
　３６ａ　第１ガス遮断弁
　３６ｂ　第２ガス遮断弁
　３６ｃ　第３ガス遮断弁
　４０　冷媒漏洩センサ
　４２　表示部
　５０　集中コントローラ
　５２　表示部 1 Air conditioner 10 Outdoor unit 11 Compressor 12 Blower 13 Expansion valve 20 Indoor unit 21 Blower 22 Expansion valve 30 Liquid refrigerant piping 30a 1st liquid refrigerant piping 30b 2nd liquid refrigerant piping 32 Gas refrigerant piping 32a 1st gas refrigerant piping 32b 2nd gas refrigerant piping 34, 36 shutoff valve 34a 1st liquid shutoff valve 34b 2nd liquid shutoff valve 34c 3rd liquid shutoff valve 36a 1st gas shutoff valve 36b 2nd gas shutoff valve 36c 3rd gas shutoff valve 40 Refrigerant leak sensor 42 Display unit 50 Centralized controller 52 Display unit

Claims (4)

  1. 　少なくとも圧縮機と熱源側熱交換器とを有する室外機と、
    　少なくとも利用側熱交換器と送風機とを有する複数の室内機と、
    　前記室外機と、前記室内機とを接続する液冷媒配管およびガス冷媒配管と、を備えた空気調和装置において、
    　前記液冷媒配管および前記ガス冷媒配管の前記室内機より上流側に設けられ、前記液冷媒配管および前記ガス冷媒配管の冷媒の流れを遮断する開閉装置と、
    　前記室内機からの冷媒の漏洩を検知する冷媒漏洩センサと、
    　前記冷媒漏洩センサによる検出信号に基づいて前記開閉装置の開閉制御を行う制御装置と、を備え、
    　前記制御装置は、前記冷媒漏洩センサにより前記室内機の冷媒漏洩を検出した場合に、当該室内機の上流側に位置する前記開閉装置を閉に制御し、
    　前記制御装置は、前記室内機の上流側に位置する前記開閉装置が閉状態でかつ当該室内機の前記冷媒漏洩センサが冷媒を検知している場合は、当該室内機の冷房運転または暖房運転を停止させる冷媒漏洩状態に制御するとともに、前記室内機の上流側に位置する前記開閉装置が閉状態でかつ当該室内機の前記冷媒漏洩センサが冷媒を検知していない場合は、当該室内機の運転を送風運転、または停止させる運転制限状態に制御することを特徴とする空気調和装置。     An outdoor unit having at least a compressor and a heat exchanger on the heat source side,
    A plurality of indoor units having at least a heat exchanger and a blower on the user side,
    In an air conditioner including a liquid refrigerant pipe and a gas refrigerant pipe connecting the outdoor unit and the indoor unit.
    An opening / closing device provided upstream of the indoor unit of the liquid refrigerant pipe and the gas refrigerant pipe to block the flow of the refrigerant in the liquid refrigerant pipe and the gas refrigerant pipe.
    A refrigerant leak sensor that detects the leakage of refrigerant from the indoor unit, and
    A control device that controls the opening / closing of the switchgear based on the detection signal of the refrigerant leak sensor is provided.
    When the refrigerant leak sensor detects the refrigerant leak of the indoor unit, the control device controls to close the switchgear located on the upstream side of the indoor unit.
    When the opening / closing device located on the upstream side of the indoor unit is closed and the refrigerant leakage sensor of the indoor unit detects the refrigerant, the control device performs a cooling operation or a heating operation of the indoor unit. When the opening / closing device located on the upstream side of the indoor unit is closed and the refrigerant leakage sensor of the indoor unit does not detect the refrigerant, the operation of the indoor unit is controlled while controlling the refrigerant leakage state to be stopped. An air conditioner characterized in that the air conditioner is controlled to a restricted operation state in which the air conditioner is operated or stopped.
  2. 　前記制御装置は、前記室内機の上流側に位置する前記開閉装置が開状態であれば、冷房運転、暖房運転および送風運転のいずれかを行う運転可能状態に制御することを特徴とする請求項１に記載の空気調和装置。 The control device is characterized in that, if the switchgear located on the upstream side of the indoor unit is in the open state, it is controlled to be in an operable state in which any of cooling operation, heating operation, and ventilation operation is performed. The air conditioner according to 1.
  3. 　前記制御装置は、前記室内機の運転状態を確認するための表示部を備え、
    　前記制御装置は、前記表示部に、前記室内機が、冷媒漏洩状態、運転制限状態または運転可能状態のいずれの状態かを表示させることを特徴とする請求項２に記載の空気調和装置。     The control device includes a display unit for confirming the operating state of the indoor unit.
    The air conditioning device according to claim 2, wherein the control device causes the display unit to display whether the indoor unit is in a refrigerant leak state, an operation restricted state, or an operable state.
  4. 　複数の前記室内機は、表示部をそれぞれ備え、
    　前記制御装置は、冷媒漏洩状態の前記室内機の前記表示部に、冷媒漏洩状態であることおよび運転可能状態の前記室内機が存在すること、運転制限状態の前記室内機の前記表示部には、運転制限状態であることおよび運転可能状態の前記室内機が存在すること、運転可能状態の前記室内機の表示部には、運転可能状態であることおよび冷媒漏洩状態の前記室内機が存在すること、をそれぞれ表示させることを特徴とする請求項２または請求項３に記載の空気調和装置。     Each of the plurality of indoor units is provided with a display unit.
    In the control device, the display unit of the indoor unit in the refrigerant leak state has the refrigerant leak state, the indoor unit in the operable state exists, and the display unit of the indoor unit in the operation restricted state. , The indoor unit in the operation restricted state and the operable state exists, and the indoor unit in the operable state and the refrigerant leaking state exists in the display unit of the indoor unit in the operable state. The air conditioner according to claim 2 or 3, wherein each of the above is displayed.
PCT/JP2021/018467 2020-05-27 2021-05-14 Air-conditioning device WO2021241290A1 (en)

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