WO2023199719A1 - Air conditioning system and method for controlling air conditioning system - Google Patents

Air conditioning system and method for controlling air conditioning system Download PDF

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Publication number
WO2023199719A1
WO2023199719A1 PCT/JP2023/011453 JP2023011453W WO2023199719A1 WO 2023199719 A1 WO2023199719 A1 WO 2023199719A1 JP 2023011453 W JP2023011453 W JP 2023011453W WO 2023199719 A1 WO2023199719 A1 WO 2023199719A1
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WIPO (PCT)
Prior art keywords
refrigerant
leakage
air conditioning
conditioning system
detection device
Prior art date
Application number
PCT/JP2023/011453
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French (fr)
Japanese (ja)
Inventor
直也 足立
健太 新井
Original Assignee
三菱重工サーマルシステムズ株式会社
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Publication of WO2023199719A1 publication Critical patent/WO2023199719A1/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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F24F11/526—Indication arrangements, e.g. displays giving audible indications
    • 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
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Definitions

  • the present disclosure relates to an air conditioning system and a method of controlling the air conditioning system.
  • This application claims priority based on Japanese Patent Application No. 2022-066729 filed in Japan on April 14, 2022, the contents of which are incorporated herein.
  • Patent Document 1 describes a system in which an indoor unit transmits a signal instructing a shut-off valve to close to a shut-off valve device having a shut-off valve when a refrigerant detector detects a refrigerant leak. has been done.
  • shutoff valve device that can be used for one 10 horsepower indoor unit, but one for each 1 horsepower indoor unit. be. For this reason, it is desirable to use one shutoff valve device for a plurality of indoor units.
  • An object of the present disclosure is to provide an air conditioning system and an air conditioning system control method that can detect refrigerant leakage with a simple configuration.
  • the air conditioning system includes an outdoor unit, a plurality of indoor units, refrigerant piping that circulates a refrigerant between the outdoor unit and the indoor unit, and each of the plurality of indoor units.
  • a detection device that is provided in an air conditioning area and includes a refrigerant sensor that detects leakage of the refrigerant into the air conditioning area; and a relay that closes a leakage notification circuit when the refrigerant sensor detects leakage of the refrigerant;
  • a shutoff valve device includes a shutoff valve provided in a refrigerant pipe, and a control unit that is connected to the leakage notification circuit and closes the shutoff valve when the leakage notification circuit is closed.
  • a method for controlling an air conditioning system includes an outdoor unit, a plurality of indoor units, and refrigerant piping that circulates a refrigerant between the outdoor unit and the indoor unit.
  • the method includes the step of detecting leakage of the refrigerant into the air conditioning area with a refrigerant sensor provided in an air conditioning area handled by each of a plurality of indoor units, and the case where the refrigerant sensor detects the leakage of the refrigerant.
  • the method further includes the steps of: closing a leak notification circuit using a relay; and, when the leak notification circuit is closed, closing a cutoff valve provided in the refrigerant pipe.
  • refrigerant leakage can be detected with a simple configuration.
  • FIG. 1 is a diagram showing the overall configuration of an air conditioning system according to a first embodiment. It is a diagram showing the functional configuration of a detection device and a cutoff valve device according to a first embodiment.
  • FIG. 2 is a sequence diagram showing an example of processing of the air conditioning system according to the first embodiment. It is a sequence diagram showing an example of processing of an air conditioning system concerning other embodiments.
  • FIG. 1 is a diagram showing the overall configuration of an air conditioning system according to a first embodiment.
  • the air conditioning system 100 includes an outdoor unit 1, a plurality of indoor units 2 (2A to 2C), a refrigerant pipe 3, a plurality of remote controllers 21 (21A to 21C), and a plurality of The detection device 22 (22A to 22C) and the shutoff valve device 4 are provided.
  • the outdoor unit 1 has a compressor, a heat exchanger, etc. (not shown), and sends refrigerant to each indoor unit 2 via the refrigerant piping 3. Furthermore, the outdoor unit 1 and the indoor unit 2 are communicably connected via an indoor/outdoor communication line 24 .
  • the indoor units 2 (2A to 2C) perform air conditioning so that the temperature, etc. of the air conditioning areas A to C in charge of the indoor units 2 (2A to 2C) approach the air conditioning settings specified by the user. Further, the indoor unit 2 according to the present embodiment stops operation of the indoor unit 2 when leakage of refrigerant is detected.
  • FIG. 1 shows an example in which the air conditioning system 100 includes three indoor units 2, the present invention is not limited to this. In other embodiments, the air conditioning system 100 may have four or more indoor units 2.
  • the refrigerant pipe 3 allows the refrigerant to flow between the outdoor unit 1 and the plurality of indoor units 2.
  • the shutoff valve device 4 is provided between the outdoor unit 1 of the refrigerant pipe 3 and the plurality of indoor units 2.
  • the cutoff valve device 4 closes the cutoff valve to cut off the flow of refrigerant in the refrigerant pipe 3 when a detection device 22 (described later) detects refrigerant leakage.
  • remote controllers 21 21A to 21C
  • detection devices 22 22A to 22C
  • air conditioning areas A to C of each indoor unit 2 (2A to 2C) respectively.
  • Indoor unit 2 remote control 21, and detection device 22 are communicably connected via remote control communication lines 23 (23A to 23C).
  • the remote control 21 and the detection device 22 are attached to a wall or the like near the indoor unit 2.
  • the remote control 21 transmits the air conditioning settings (temperature, etc.) specified by the user to the indoor unit 2 via the remote control communication line 23.
  • the detection device 22 detects leakage of refrigerant into the air-conditioned area where the own machine is installed. Further, the detection device 22 and the cutoff valve device 4 are connected via a leak notification circuit 25 that can be opened and closed by the detection device 22. When detecting refrigerant leakage, the detection device 22 notifies the cutoff valve device 4 by closing the leakage notification circuit 25 and making it energized.
  • FIG. 2 is a diagram showing the functional configuration of the detection device and the cutoff valve device according to the first embodiment.
  • each detection device 22 (22A to 22C) includes a refrigerant sensor 220, a relay 221, and a CPU 222.
  • the refrigerant sensor 220 detects leakage of refrigerant into the air conditioning area.
  • the relay 221 is a semiconductor relay such as a photocoupler, or a mechanical relay. In this embodiment, an example in which the relay 221 is a photocoupler will be described.
  • the relay 221 is switched on and off under the control of the CPU 222.
  • the relay 221 is turned on when current flows under the control of the CPU 222, closing the leak notification circuit 25 between the detection device 22 and the cutoff valve device 4, and making it energized. Furthermore, when no current is flowing, the relay 221 is turned off, opening the leakage notification circuit 25 and placing it in a non-energized state.
  • the CPU 222 performs control to turn on the relay 221 when the refrigerant sensor 220 detects refrigerant leakage.
  • the cutoff valve device 4 includes a cutoff valve 40 and a CPU 41 (control unit).
  • the cutoff valve 40 allows or cuts off the flow of refrigerant in the refrigerant pipe 3 by opening and closing according to a control signal from the CPU 41.
  • the CPU 41 outputs a control signal to close the cutoff valve 40 when the leak notification circuit 25 between the plurality of detection devices 22A to 22C is closed (energized).
  • FIG. 3 is a sequence diagram showing an example of processing of the air conditioning system according to the first embodiment.
  • FIG. 3 a process flow when the air conditioning system 100 detects refrigerant leakage will be described.
  • FIG. 3 it is assumed that refrigerant leaks into the air conditioning area A of the indoor unit 2A.
  • the refrigerant sensor 220 of the detection device 22A detects that refrigerant has leaked into the air conditioning area A (step S100). Then, the CPU 222 of the detection device 22A turns on the relay 221 and closes the leak notification circuit 25 (step S101).
  • step S102 When the CPU 41 of the cutoff valve device 4 detects that the leak notification circuit 25 with the detection device 22A is closed (step S102), it closes the cutoff valve 40 to cut off the flow of refrigerant (step S103). This suppresses further leakage of the refrigerant.
  • step S101 the CPU 222 of the detection device 22A transmits a leakage detection signal indicating that refrigerant leakage has been detected to the remote control 21A installed in the same air conditioning area A as the own device. (Step S104).
  • the remote control 21A When the remote control 21A receives the leakage detection signal from the detection device 22A, it outputs an alarm (step S105).
  • the remote controller 21A outputs, for example, a sound and light alarm.
  • the remote controller 21A transmits a leakage detection signal to the indoor unit 2A installed in the same air conditioning area A as the remote controller 21A (step S106).
  • the indoor unit 2A When the indoor unit 2A receives the leak detection signal from the remote controller 21A, it transmits the leak detection signal to the other indoor units 2B and 2C via the indoor/outdoor communication line 24 (step S107), and stops operation (step S107). S108).
  • the indoor unit 2A can notify the other indoor units 2B and 2C that a refrigerant leak has been detected in the air conditioning area A and the refrigerant flow has been cut off. Thereby, the indoor units 2B and 2C can appropriately stop operation even if refrigerant leakage occurs in the air conditioning area A that is not in charge of the indoor units 2B and 2C.
  • the air conditioning system 100 includes the detection device 22 having the relay 221 that closes the leak notification circuit 25 when the refrigerant sensor 220 detects leakage of refrigerant into the air conditioning area, and the leak notification circuit 25. and a cutoff valve device 4 that closes the cutoff valve 40 when the cutoff valve 40 is closed.
  • the air conditioning system 100 has a simple configuration in which the leak notification circuit 25 is switched on and off using the relay 221 of the detection device 22, and can notify the shutoff valve device 4 of the presence or absence of a refrigerant leak. can.
  • the detection device 22 itself can notify the shutoff valve device 4 that refrigerant leakage has been detected, a communication circuit etc. for notifying the shutoff valve device 4 of refrigerant leakage is added to the board of the indoor unit 2. There's no need to. Therefore, the air conditioning system 100 can have a rational configuration using the existing indoor unit 2.
  • the configuration is simple, just providing the leak notification circuit 25 between the detection device 22 and the shutoff valve device 4, any number of indoor units 2 can be connected to one outdoor unit 1 and the shutoff valve device 4. It is possible to do so.
  • the air conditioning system 100 further includes a remote control 21 that is communicably connected to both the indoor unit 2 and the detection device 22 installed in the same air conditioning area.
  • the remote control 21 transmits a leakage detection signal to the indoor unit 2 when the detection device 22 detects leakage of refrigerant into the air-conditioned area. Further, the indoor unit 2 stops operation when receiving a leakage detection signal from the remote controller 21.
  • the air conditioning system 100 can promptly stop the operation of the indoor unit 2 when leakage of refrigerant is detected. Furthermore, an existing remote control communication line 23 for transmitting and receiving leakage detection signals to and from the indoor unit 2 and the detection device 22 can be used.
  • the indoor unit 2 when the indoor unit 2 receives a leakage detection signal from the remote controller 21, it transmits the leakage detection signal to other indoor units 2 via the indoor/outdoor communication line 24. Moreover, the indoor unit 2 stops operation when a leakage detection signal is received from another indoor unit 2.
  • each indoor unit 2 can appropriately stop its operation even if refrigerant leakage occurs in an air conditioning area that is not in charge of the indoor unit 2.
  • the remote control 21 outputs an alarm when the detection device 22 detects a refrigerant leak.
  • the remote controller 21 can notify the person in the air-conditioned area where the remote controller 21 is located that there is a refrigerant leak.
  • FIG. 4 is a sequence diagram illustrating an example of processing of an air conditioning system according to another embodiment.
  • the detection device 22 transmits a leakage detection signal to the indoor unit 2 via the remote control 21, but the present invention is not limited to this.
  • the detection device 22 may detect that the leak notification circuit 25 in another air-conditioned area is closed.
  • FIG. 4 shows an example of processing performed by the indoor unit 2B, remote control 21B, and detection device 22B in the air conditioning area B when refrigerant leakage is detected in the air conditioning area A.
  • the processing of the remote controller 21A and the detection device 22A in the air-conditioned area A, and the processing of the cutoff valve device 4 are the same as in the first embodiment, and therefore, description thereof will be omitted.
  • the indoor unit 2A in the air conditioning area A transmits a leakage detection signal to the other indoor units 2B and 2C (step S107 in FIG. 3). Omit and stop operation.
  • the detection device 22B in the air conditioning area B always monitors whether the leak notification circuits 25 in the other air conditioning areas A and C are open or closed.
  • the detection device 22B detects that the leakage notification circuit 25 in the air-conditioned area A is closed (step S200)
  • it transmits a leakage detection signal to the remote controller 21B (step S201).
  • the detection device 22B generates a signal (other area leak detection signal) that is different from when the own device detects a refrigerant leak so that it can be identified that the refrigerant leak has been detected in another air conditioned area A. You can also send it.
  • the remote control 21B When the remote control 21B receives the other area leakage detection signal from the detection device 22B, it transmits it to the indoor unit 2B (step S202).
  • the indoor unit 2B When the indoor unit 2B receives the other area leakage detection signal from the remote controller 21B, it stops operating (step S203).
  • the indoor unit 2C, remote control 21C, and detection device 22C in the air conditioning area C perform the same processing as each device in the air conditioning area B.
  • the air conditioning system 100 can eliminate the need for transmitting and receiving leakage detection signals between the indoor units 2.
  • each indoor unit 2 can quickly detect the presence or absence of refrigerant leakage in other air-conditioning areas from the state of the leakage notification circuit 25, and can appropriately stop its operation.
  • the air conditioning system 100 includes an outdoor unit 1, a plurality of indoor units 2, a refrigerant pipe 3 that circulates refrigerant between the outdoor unit 1 and the indoor units 2, and a plurality of indoor units 2.
  • a refrigerant sensor 220 that is provided in the air conditioning area that each machine 2 is in charge of and detects leakage of refrigerant into the air conditioning area, and a relay 221 that closes the leak notification circuit 25 when the refrigerant sensor 220 detects refrigerant leakage.
  • a cutoff valve device 4 having a detection device 22 having a detection device 22, a cutoff valve 40 provided in a refrigerant pipe 3, and a control unit 41 connected to a leakage notification circuit 25 and closing the cutoff valve 40 when the leakage notification circuit 25 is closed. and.
  • the air conditioning system 100 has a simple configuration in which the leak notification circuit 25 is switched on and off using the relay 221 of the detection device 22, and can notify the shutoff valve device 4 of the presence or absence of a refrigerant leak. can.
  • the detection device 22 itself can notify the shutoff valve device 4 that refrigerant leakage has been detected, a communication circuit etc. for notifying the shutoff valve device 4 of refrigerant leakage is added to the board of the indoor unit 2. There's no need to. Therefore, the air conditioning system 100 can have a rational configuration using the existing indoor unit 2.
  • it since it has a simple configuration that only requires the leak notification circuit 25 to be provided between the detection device 22 and the shutoff valve device 4, any number of indoor units 2 can be connected to one outdoor unit 1 and the shutoff valve device 4. It is possible to do so.
  • the air conditioning system 100 is provided in each of the plurality of air conditioning areas and can communicate with both the indoor unit 2 and the detection device 22 installed in the air conditioning area.
  • the remote controller 21 transmits a leak detection signal to the indoor unit 2 when the detection device 22 detects a refrigerant leak, and the indoor unit 2 receives the leak detection signal. Stop operation if
  • the air conditioning system 100 can promptly stop the operation of the indoor unit 2 when leakage of refrigerant is detected. Furthermore, an existing remote control communication line 23 for transmitting and receiving leakage detection signals to and from the indoor unit 2 and the detection device 22 can be used.
  • each of the plurality of indoor units 2 can communicate with each other.
  • a leakage detection signal is transmitted to other indoor units 2 via a communication line 24 connected to the indoor unit 2.
  • each indoor unit 2 can appropriately stop its operation even if refrigerant leakage occurs in an air conditioning area that is not in charge of the indoor unit 2.
  • the detection device 22 detects the leakage of refrigerant in another air conditioning area when the leakage notification circuit 25 of the other detection device 22 is closed.
  • the remote controller 21 detects leakage and transmits a leakage detection signal to the indoor unit 2 when the detection device 22 detects a leakage of refrigerant in another air-conditioned area.
  • the air conditioning system 100 can eliminate the need for transmitting and receiving leakage detection signals between the indoor units 2.
  • each indoor unit 2 can quickly detect the presence or absence of refrigerant leakage in other air-conditioning areas from the state of the leakage notification circuit 25, and can appropriately stop its operation.
  • the remote controller 21 outputs an alarm when the detection device 22 detects refrigerant leakage. .
  • the remote controller 21 can notify the person in the air-conditioned area where the remote controller 21 is located that there is a refrigerant leak.
  • a method for controlling an air conditioning system 100 including an outdoor unit 1, a plurality of indoor units 2, and a refrigerant pipe 3 that circulates a refrigerant between the outdoor unit 1 and the indoor units 2.
  • the steps include a step of detecting leakage of refrigerant into the air conditioning area using a refrigerant sensor 220 provided in the air conditioning area handled by each of the plurality of indoor units 2;
  • the method includes a step of closing the leak notification circuit 25, and a step of closing the cutoff valve 40 provided in the refrigerant pipe 3 when the leak notification circuit 25 is closed.
  • refrigerant leakage can be detected with a simple configuration.
  • Air conditioning system 1 Outdoor units 2, 2A, 2B, 2C Indoor units 21, 21A, 21B, 21C Remote controller (remote control) 22, 22A, 22B, 22C Detection device 220 Refrigerant sensor 221 Relay 222 CPU 23, 23A, 23B, 23C Remote control communication line 24 Indoor/outdoor communication line (communication line) 25 Leakage notification circuit 3 Refrigerant piping 4 Shutoff valve device 40 Shutoff valve 41 CPU (control unit)

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Abstract

This air conditioning system (100) comprises: refrigerant piping (3) for channeling refrigerant between an outdoor unit (1) and a plurality of indoor units (2); detection devices (22) provided in air-conditioned areas respectively handled by the plurality of indoor units (2), the detection devices (22) each having a refrigerant sensor (220) for detecting leakage of the refrigerant into the corresponding air-conditioned area, and a relay (221) for closing a leakage notification circuit (25) if the refrigerant sensor (220) detects leakage of the refrigerant; and a cutoff valve device (4) having a cutoff valve (40) provided to the refrigerant piping (3), and a control unit (41) for closing the cutoff valve (40) when the leakage detection circuit (25) is closed, the control unit (41) being connected to the leakage detection circuit (25).

Description

空調システムおよび空調システムの制御方法Air conditioning systems and air conditioning system control methods
　本開示は、空調システムおよび空調システムの制御方法に関する。
　本願は、２０２２年４月１４日に、日本に出願された特願２０２２－０６６７２９号に基づき優先権を主張し、その内容をここに援用する。 The present disclosure relates to an air conditioning system and a method of controlling the air conditioning system.
This application claims priority based on Japanese Patent Application No. 2022-066729 filed in Japan on April 14, 2022, the contents of which are incorporated herein.
　室外機と室内機との間で流通する冷媒として微燃性冷媒を一定量以上使用する場合、室内機を設置する空間（部屋）の広さによっては、冷媒の流通を遮断する遮断弁などの安全装置を設ける必要がある。 If a certain amount or more of slightly flammable refrigerant is used as the refrigerant flowing between the outdoor unit and the indoor unit, depending on the size of the space (room) where the indoor unit is installed, it may be necessary to install a shutoff valve or the like to shut off the flow of the refrigerant. Safety devices must be provided.
　例えば、特許文献１には、室内機は、冷媒検知器が冷媒の漏洩を検知した場合に、遮断弁を有する遮断弁装置に対して、遮断弁の閉鎖を指示する信号を送信するシステムが記載されている。 For example, Patent Document 1 describes a system in which an indoor unit transmits a signal instructing a shut-off valve to close to a shut-off valve device having a shut-off valve when a refrigerant detector detects a refrigerant leak. has been done.
日本国特開２０２１－８５６４３号公報Japanese Patent Application Publication No. 2021-85643
　１台の室外機に対し、複数の室内機を接続する空調システムがある。室内機は１馬力から１０馬力まで様々なものがあるが、１０馬力の室内機１台に使用できる遮断弁装置を、１馬力の室内機それぞれに対し１つずつ使用するのは非効率的である。このため、複数の室内機に対し１つの遮断弁装置を使用することが望ましい。 There are air conditioning systems that connect multiple indoor units to one outdoor unit. There are various types of indoor units ranging from 1 horsepower to 10 horsepower, but it is inefficient to use a shutoff valve device that can be used for one 10 horsepower indoor unit, but one for each 1 horsepower indoor unit. be. For this reason, it is desirable to use one shutoff valve device for a plurality of indoor units.
　しかしながら、従来の室内機が遮断弁装置に対し遮断弁の閉鎖を指示するシステムでは、各室内機の基板に、遮断弁装置との通信用の回路を追加する必要がある。そうすると、室内機の製造コストの増大や、既存の室内機を利用できないなどの不利益が生じる。 However, in the conventional system in which the indoor unit instructs the shutoff valve device to close the shutoff valve, it is necessary to add a circuit for communication with the shutoff valve device to the board of each indoor unit. This will result in disadvantages such as an increase in the manufacturing cost of the indoor unit and the inability to use existing indoor units.
　本開示の目的は、簡易な構成で冷媒の漏洩を検知することができる空調システムおよび空調システムの制御方法を提供することにある。 An object of the present disclosure is to provide an air conditioning system and an air conditioning system control method that can detect refrigerant leakage with a simple configuration.
　本開示の一態様によれば、空調システムは、室外機と、複数の室内機と、前記室外機および前記室内機の間で冷媒を流通させる冷媒配管と、複数の前記室内機それぞれが担当する空調エリアに設けられ、前記空調エリアへの前記冷媒の漏洩を検知する冷媒センサと、前記冷媒センサが前記冷媒の漏洩を検知した場合に漏洩通知回路を閉じるリレーと、を有する検知装置と、前記冷媒配管に設けられる遮断弁と、前記漏洩通知回路に接続され、前記漏洩通知回路が閉じた場合に前記遮断弁を閉じる制御部と、を有する遮断弁装置と、を備える。 According to one aspect of the present disclosure, the air conditioning system includes an outdoor unit, a plurality of indoor units, refrigerant piping that circulates a refrigerant between the outdoor unit and the indoor unit, and each of the plurality of indoor units. a detection device that is provided in an air conditioning area and includes a refrigerant sensor that detects leakage of the refrigerant into the air conditioning area; and a relay that closes a leakage notification circuit when the refrigerant sensor detects leakage of the refrigerant; A shutoff valve device includes a shutoff valve provided in a refrigerant pipe, and a control unit that is connected to the leakage notification circuit and closes the shutoff valve when the leakage notification circuit is closed.
　本開示の一態様によれば、空調システムの制御方法は、室外機と、複数の室内機と、前記室外機および前記室内機の間で冷媒を流通させる冷媒配管と、を備える空調システムの制御方法であって、複数の室内機それぞれが担当する空調エリアに設けられた冷媒センサにより、前記空調エリアへの前記冷媒の漏洩を検知するステップと、前記冷媒センサが前記冷媒の漏洩を検知した場合にリレーにより漏洩通知回路を閉じるステップと、前記漏洩通知回路が閉じた場合に、前記冷媒配管に設けられた遮断弁を閉じるステップと、を有する。 According to one aspect of the present disclosure, a method for controlling an air conditioning system includes an outdoor unit, a plurality of indoor units, and refrigerant piping that circulates a refrigerant between the outdoor unit and the indoor unit. The method includes the step of detecting leakage of the refrigerant into the air conditioning area with a refrigerant sensor provided in an air conditioning area handled by each of a plurality of indoor units, and the case where the refrigerant sensor detects the leakage of the refrigerant. The method further includes the steps of: closing a leak notification circuit using a relay; and, when the leak notification circuit is closed, closing a cutoff valve provided in the refrigerant pipe.
　上記態様によれば、簡易な構成で冷媒の漏洩を検知することができる。 According to the above aspect, refrigerant leakage can be detected with a simple configuration.
第１の実施形態に係る空調システムの全体構成を示す図である。FIG. 1 is a diagram showing the overall configuration of an air conditioning system according to a first embodiment. 第１の実施形態に係る検知装置および遮断弁装置の機能構成を示す図である。It is a diagram showing the functional configuration of a detection device and a cutoff valve device according to a first embodiment. 第１の実施形態に係る空調システムの処理の一例を示すシーケンス図である。FIG. 2 is a sequence diagram showing an example of processing of the air conditioning system according to the first embodiment. 他の実施形態に係る空調システムの処理の一例を示すシーケンス図である。It is a sequence diagram showing an example of processing of an air conditioning system concerning other embodiments.
＜第１の実施形態＞
　以下、図１～図３を参照しながら本実施形態に係る空調システム１００について詳しく説明する。 <First embodiment>
The air conditioning system 100 according to this embodiment will be described in detail below with reference to FIGS. 1 to 3.
（空調システムの全体構成）
　図１は、第１の実施形態に係る空調システムの全体構成を示す図である。
　図１に示すように、空調システム１００は、室外機１と、複数の室内機２（２Ａ～２Ｃ）と、冷媒配管３と、複数のリモートコントローラ（リモコン）２１（２１Ａ～２１Ｃ）と、複数の検知装置２２（２２Ａ～２２Ｃ）と、遮断弁装置４とを備える。 (Overall configuration of air conditioning system)
FIG. 1 is a diagram showing the overall configuration of an air conditioning system according to a first embodiment.
As shown in FIG. 1, the air conditioning system 100 includes an outdoor unit 1, a plurality of indoor units 2 (2A to 2C), a refrigerant pipe 3, a plurality of remote controllers 21 (21A to 21C), and a plurality of The detection device 22 (22A to 22C) and the shutoff valve device 4 are provided.
　室外機１は、圧縮機、熱交換器など（不図示）を有しており、冷媒配管３を介して冷媒を各室内機２へ送出する。また、室外機１および室内機２は、室内室外通信線２４を介して通信可能に接続される。 The outdoor unit 1 has a compressor, a heat exchanger, etc. (not shown), and sends refrigerant to each indoor unit 2 via the refrigerant piping 3. Furthermore, the outdoor unit 1 and the indoor unit 2 are communicably connected via an indoor/outdoor communication line 24 .
　室内機２（２Ａ～２Ｃ）は、担当する空調エリアＡ～Ｃの温度などがユーザの指定する空調設定に近づくように、空調を行う。また、本実施形態に係る室内機２は、冷媒の漏洩が検知された場合に、室内機２の運転を停止する。なお、図１には、空調システム１００が３台の室内機２を有する例が示されているが、これに限られることはない。他の実施形態では、空調システム１００が４台以上の室内機２を有していてもよい。 The indoor units 2 (2A to 2C) perform air conditioning so that the temperature, etc. of the air conditioning areas A to C in charge of the indoor units 2 (2A to 2C) approach the air conditioning settings specified by the user. Further, the indoor unit 2 according to the present embodiment stops operation of the indoor unit 2 when leakage of refrigerant is detected. Although FIG. 1 shows an example in which the air conditioning system 100 includes three indoor units 2, the present invention is not limited to this. In other embodiments, the air conditioning system 100 may have four or more indoor units 2.
　冷媒配管３は、室外機１と、複数の室内機２との間で冷媒を流通させる。 The refrigerant pipe 3 allows the refrigerant to flow between the outdoor unit 1 and the plurality of indoor units 2.
　遮断弁装置４は、冷媒配管３の室外機１と、複数の室内機２との間に設けられる。遮断弁装置４は、後述の検知装置２２が冷媒の漏洩を検知した場合に、遮断弁を閉じて冷媒配管３の冷媒の流通を遮断する。 The shutoff valve device 4 is provided between the outdoor unit 1 of the refrigerant pipe 3 and the plurality of indoor units 2. The cutoff valve device 4 closes the cutoff valve to cut off the flow of refrigerant in the refrigerant pipe 3 when a detection device 22 (described later) detects refrigerant leakage.
　また、各室内機２（２Ａ～２Ｃ）の空調エリアＡ～Ｃには、それぞれ、リモコン２１（２１Ａ～２１Ｃ）および検知装置２２（２２Ａ～２２Ｃ）が設けられる。室内機２、リモコン２１、および検知装置２２は、リモコン通信線２３（２３Ａ～２３Ｃ）を介して通信可能に接続される。例えば、リモコン２１および検知装置２２は、室内機２の近傍の壁面などに取り付けられる。 Furthermore, remote controllers 21 (21A to 21C) and detection devices 22 (22A to 22C) are provided in air conditioning areas A to C of each indoor unit 2 (2A to 2C), respectively. Indoor unit 2, remote control 21, and detection device 22 are communicably connected via remote control communication lines 23 (23A to 23C). For example, the remote control 21 and the detection device 22 are attached to a wall or the like near the indoor unit 2.
　リモコン２１は、ユーザにより指定された空調設定（温度など）を、リモコン通信線２３を介して空調設定を室内機２に送信する。 The remote control 21 transmits the air conditioning settings (temperature, etc.) specified by the user to the indoor unit 2 via the remote control communication line 23.
　検知装置２２は、自機が設置された空調エリアへの冷媒の漏洩を検知する。また、検知装置２２と遮断弁装置４とは、検知装置２２により開閉可能な漏洩通知回路２５を介して接続される。検知装置２２は、冷媒の漏洩を検知した場合に、漏洩通知回路２５を閉じて通電状態にすることにより、遮断弁装置４に通知する。 The detection device 22 detects leakage of refrigerant into the air-conditioned area where the own machine is installed. Further, the detection device 22 and the cutoff valve device 4 are connected via a leak notification circuit 25 that can be opened and closed by the detection device 22. When detecting refrigerant leakage, the detection device 22 notifies the cutoff valve device 4 by closing the leakage notification circuit 25 and making it energized.
（検知装置の機能構成）
　図２は、第１の実施形態に係る検知装置および遮断弁装置の機能構成を示す図である。
　図２に示すように、各検知装置２２（２２Ａ～２２Ｃ）は、冷媒センサ２２０と、リレー２２１と、ＣＰＵ２２２とを備える。 (Functional configuration of detection device)
FIG. 2 is a diagram showing the functional configuration of the detection device and the cutoff valve device according to the first embodiment.
As shown in FIG. 2, each detection device 22 (22A to 22C) includes a refrigerant sensor 220, a relay 221, and a CPU 222.
　冷媒センサ２２０は、空調エリアへの冷媒の漏洩を検知する。 The refrigerant sensor 220 detects leakage of refrigerant into the air conditioning area.
　リレー２２１は、フォトカプラなどの半導体リレー、または、メカニカルリレーである。本実施形態では、リレー２２１がフォトカプラである例について説明する。リレー２２１は、ＣＰＵ２２２の制御によりオンとオフとを切り替える。リレー２２１は、ＣＰＵ２２２の制御により電流が流れるとオンとなり、検知装置２２と遮断弁装置４との間の漏洩通知回路２５を閉じて通電状態にする。また、リレー２２１は、電流が流れていないときはオフとなり、漏洩通知回路２５を開放して非通電状態にする。 The relay 221 is a semiconductor relay such as a photocoupler, or a mechanical relay. In this embodiment, an example in which the relay 221 is a photocoupler will be described. The relay 221 is switched on and off under the control of the CPU 222. The relay 221 is turned on when current flows under the control of the CPU 222, closing the leak notification circuit 25 between the detection device 22 and the cutoff valve device 4, and making it energized. Furthermore, when no current is flowing, the relay 221 is turned off, opening the leakage notification circuit 25 and placing it in a non-energized state.
　ＣＰＵ２２２は、冷媒センサ２２０が冷媒の漏洩を検知した場合に、リレー２２１をオンにする制御を行う。 The CPU 222 performs control to turn on the relay 221 when the refrigerant sensor 220 detects refrigerant leakage.
（遮断弁装置の機能構成）
　図２に示すように、遮断弁装置４は、遮断弁４０と、ＣＰＵ４１（制御部）とを備える。 (Functional configuration of shutoff valve device)
As shown in FIG. 2, the cutoff valve device 4 includes a cutoff valve 40 and a CPU 41 (control unit).
　遮断弁４０は、ＣＰＵ４１の制御信号にしたがって開閉することにより、冷媒配管３の冷媒の流通を許可または遮断する。 The cutoff valve 40 allows or cuts off the flow of refrigerant in the refrigerant pipe 3 by opening and closing according to a control signal from the CPU 41.
　ＣＰＵ４１は、複数の検知装置２２Ａ～２２Ｃの何れかとの間の漏洩通知回路２５が閉じた（通電した）場合に、遮断弁４０を閉じる制御信号を出力する。 The CPU 41 outputs a control signal to close the cutoff valve 40 when the leak notification circuit 25 between the plurality of detection devices 22A to 22C is closed (energized).
（空調システムの処理の流れ）
　図３は、第１の実施形態に係る空調システムの処理の一例を示すシーケンス図である。
　ここでは、図３を参照しながら、空調システム１００が冷媒の漏洩を検知したときの処理の流れについて説明する。なお、図３の例では、室内機２Ａの空調エリアＡに冷媒が漏洩したとする。 (Air conditioning system processing flow)
FIG. 3 is a sequence diagram showing an example of processing of the air conditioning system according to the first embodiment.
Here, with reference to FIG. 3, a process flow when the air conditioning system 100 detects refrigerant leakage will be described. In the example of FIG. 3, it is assumed that refrigerant leaks into the air conditioning area A of the indoor unit 2A.
　まず、検知装置２２Ａの冷媒センサ２２０は、空調エリアＡに冷媒が漏洩したことを検知する（ステップＳ１００）。そうすると、検知装置２２ＡのＣＰＵ２２２は、リレー２２１をオンにして漏洩通知回路２５を閉じる（ステップＳ１０１）。 First, the refrigerant sensor 220 of the detection device 22A detects that refrigerant has leaked into the air conditioning area A (step S100). Then, the CPU 222 of the detection device 22A turns on the relay 221 and closes the leak notification circuit 25 (step S101).
　遮断弁装置４のＣＰＵ４１は、検知装置２２Ａとの間の漏洩通知回路２５が閉じたことを検知すると（ステップＳ１０２）、遮断弁４０を閉じて冷媒の流通を遮断する（ステップＳ１０３）。これにより、冷媒のさらなる漏洩を抑制する。　 When the CPU 41 of the cutoff valve device 4 detects that the leak notification circuit 25 with the detection device 22A is closed (step S102), it closes the cutoff valve 40 to cut off the flow of refrigerant (step S103). This suppresses further leakage of the refrigerant.　
　また、検知装置２２ＡのＣＰＵ２２２は、ステップＳ１０１の後に、またはステップＳ１０１と並行して、自機と同じ空調エリアＡに設置されたリモコン２１Ａに冷媒の漏洩を検知したことを表す漏洩検知信号を送信する（ステップＳ１０４）。 Further, after step S101 or in parallel with step S101, the CPU 222 of the detection device 22A transmits a leakage detection signal indicating that refrigerant leakage has been detected to the remote control 21A installed in the same air conditioning area A as the own device. (Step S104).
　リモコン２１Ａは、検知装置２２Ａから漏洩検知信号を受信すると、警報を出力する（ステップＳ１０５）。リモコン２１Ａは、例えば、音および光による警報を出力する。 When the remote control 21A receives the leakage detection signal from the detection device 22A, it outputs an alarm (step S105). The remote controller 21A outputs, for example, a sound and light alarm.
　また、リモコン２１Ａは、ステップＳ１０５の後に、またはステップＳ１０５と並行して、自機と同じ空調エリアＡに設置された室内機２Ａに漏洩検知信号を送信する（ステップＳ１０６）。 Further, after step S105 or in parallel with step S105, the remote controller 21A transmits a leakage detection signal to the indoor unit 2A installed in the same air conditioning area A as the remote controller 21A (step S106).
　室内機２Ａは、リモコン２１Ａから漏洩検知信号を受信すると、室内室外通信線２４を介して、他の室内機２Ｂ，２Ｃに漏洩検知信号を送信して（ステップＳ１０７）、運転を停止する（ステップＳ１０８）。 When the indoor unit 2A receives the leak detection signal from the remote controller 21A, it transmits the leak detection signal to the other indoor units 2B and 2C via the indoor/outdoor communication line 24 (step S107), and stops operation (step S107). S108).
　室内機２Ｂ，２Ｃは、室内機２Ａから漏洩検知信号を受信すると、運転を停止する（ステップＳ１０９）。 When the indoor units 2B and 2C receive the leakage detection signal from the indoor unit 2A, they stop operating (step S109).
　このようにすることで、室内機２Ａは、空調エリアＡで冷媒の漏洩が検知されて冷媒の流通が遮断されたことを、他の室内機２Ｂ，２Ｃに知らせることができる。これにより、室内機２Ｂ，２Ｃは、自機の担当外の空調エリアＡで冷媒の漏洩が発生した場合であっても、適切に運転を停止することができる。 By doing so, the indoor unit 2A can notify the other indoor units 2B and 2C that a refrigerant leak has been detected in the air conditioning area A and the refrigerant flow has been cut off. Thereby, the indoor units 2B and 2C can appropriately stop operation even if refrigerant leakage occurs in the air conditioning area A that is not in charge of the indoor units 2B and 2C.
（作用、効果）
　以上のように、本実施形態に係る空調システム１００は、冷媒センサ２２０が空調エリアへの冷媒の漏洩を検知した場合に漏洩通知回路２５を閉じるリレー２２１を有する検知装置２２と、漏洩通知回路２５が閉じた場合に遮断弁４０を閉じる遮断弁装置４と、を備える。 (action, effect)
As described above, the air conditioning system 100 according to the present embodiment includes the detection device 22 having the relay 221 that closes the leak notification circuit 25 when the refrigerant sensor 220 detects leakage of refrigerant into the air conditioning area, and the leak notification circuit 25. and a cutoff valve device 4 that closes the cutoff valve 40 when the cutoff valve 40 is closed.
　このようにすることで、空調システム１００は、検知装置２２のリレー２２１で漏洩通知回路２５のオンとオフとを切り替える簡易な構成で、冷媒の漏洩の有無を遮断弁装置４に通知することができる。また、検知装置２２自身が遮断弁装置４に冷媒の漏洩を検知したことを通知可能であるため、室内機２の基板に遮断弁装置４に冷媒の漏洩を通知するための通信回路などを追加する必要がない。したがって、空調システム１００は、既存の室内機２を利用した合理的な構成とすることができる。また、検知装置２２と遮断弁装置４との間に漏洩通知回路２５を設けるのみの簡易な構成であるため、１台の室外機１および遮断弁装置４に、室内機２を何台でも接続することが可能である。 By doing so, the air conditioning system 100 has a simple configuration in which the leak notification circuit 25 is switched on and off using the relay 221 of the detection device 22, and can notify the shutoff valve device 4 of the presence or absence of a refrigerant leak. can. In addition, since the detection device 22 itself can notify the shutoff valve device 4 that refrigerant leakage has been detected, a communication circuit etc. for notifying the shutoff valve device 4 of refrigerant leakage is added to the board of the indoor unit 2. There's no need to. Therefore, the air conditioning system 100 can have a rational configuration using the existing indoor unit 2. In addition, since the configuration is simple, just providing the leak notification circuit 25 between the detection device 22 and the shutoff valve device 4, any number of indoor units 2 can be connected to one outdoor unit 1 and the shutoff valve device 4. It is possible to do so.
　また、空調システム１００は、同じ空調エリアに設置された室内機２および検知装置２２の双方と通信可能に接続されるリモコン２１をさらに備える。リモコン２１は、検知装置２２が空調エリアへの冷媒の漏洩を検知した場合に、室内機２に漏洩検知信号を送信する。また、室内機２は、リモコン２１から漏洩検知信号を受信した場合に運転を停止する。 Additionally, the air conditioning system 100 further includes a remote control 21 that is communicably connected to both the indoor unit 2 and the detection device 22 installed in the same air conditioning area. The remote control 21 transmits a leakage detection signal to the indoor unit 2 when the detection device 22 detects leakage of refrigerant into the air-conditioned area. Further, the indoor unit 2 stops operation when receiving a leakage detection signal from the remote controller 21.
　このようにすることで、空調システム１００は、冷媒の漏洩が検知された場合に、速やかに室内機２の運転を停止することができる。また、室内機２および検知装置２２と漏洩検知信号を送受信するためのリモコン通信線２３は、既存のものを利用することが可能である。 By doing so, the air conditioning system 100 can promptly stop the operation of the indoor unit 2 when leakage of refrigerant is detected. Furthermore, an existing remote control communication line 23 for transmitting and receiving leakage detection signals to and from the indoor unit 2 and the detection device 22 can be used.
　また、室内機２は、リモコン２１から漏洩検知信号を受信した場合に、室内室外通信線２４を介して他の室内機２に漏洩検知信号を送信する。また、室内機２は、他の室内機２から漏洩検知信号を受信した場合に運転を停止する。 Furthermore, when the indoor unit 2 receives a leakage detection signal from the remote controller 21, it transmits the leakage detection signal to other indoor units 2 via the indoor/outdoor communication line 24. Moreover, the indoor unit 2 stops operation when a leakage detection signal is received from another indoor unit 2.
　このようにすることで、各室内機２は、自機の担当外の空調エリアでの冷媒の漏洩の発生した場合であっても、適切に運転を停止することができる。 By doing so, each indoor unit 2 can appropriately stop its operation even if refrigerant leakage occurs in an air conditioning area that is not in charge of the indoor unit 2.
　また、リモコン２１は、検知装置２２が冷媒の漏洩を検知した場合に警報を出力する。 Additionally, the remote control 21 outputs an alarm when the detection device 22 detects a refrigerant leak.
　このようにすることで、リモコン２１は、自機が設けられた空調エリア内の人間に、冷媒の漏洩を伝達することができる。 By doing so, the remote controller 21 can notify the person in the air-conditioned area where the remote controller 21 is located that there is a refrigerant leak.
＜他の実施形態＞
　図４は、他の実施形態に係る空調システムの処理の一例を示すシーケンス図である。
　上述の実施形態において、検知装置２２がリモコン２１を介して漏洩検知信号を室内機２に送信する例について説明したが、これに限られることはない。例えば、他の実施形態では、図４に示すように、検知装置２２が他の空調エリアの漏洩通知回路２５が閉じたことを検出するようにしてもよい。 <Other embodiments>
FIG. 4 is a sequence diagram illustrating an example of processing of an air conditioning system according to another embodiment.
In the above-described embodiment, an example has been described in which the detection device 22 transmits a leakage detection signal to the indoor unit 2 via the remote control 21, but the present invention is not limited to this. For example, in another embodiment, as shown in FIG. 4, the detection device 22 may detect that the leak notification circuit 25 in another air-conditioned area is closed.
　図４には、空調エリアＡで冷媒の漏洩が検知された場合に、空調エリアＢの室内機２Ｂ、リモコン２１Ｂ、および検知装置２２Ｂが実行する処理の例が示されている。空調エリアＡのリモコン２１Ａおよび検知装置２２Ａの処理、および遮断弁装置４の処理は、第１の実施形態と同じであるため、説明を省略する。また、図４の例では、空調エリアＡの室内機２Ａは、検知装置２２Ａが冷媒の漏洩を検知すると、他の室内機２Ｂ，２Ｃに漏洩検知信号を送信する処理（図３のステップＳ１０７）を省略して、運転を停止する。 FIG. 4 shows an example of processing performed by the indoor unit 2B, remote control 21B, and detection device 22B in the air conditioning area B when refrigerant leakage is detected in the air conditioning area A. The processing of the remote controller 21A and the detection device 22A in the air-conditioned area A, and the processing of the cutoff valve device 4 are the same as in the first embodiment, and therefore, description thereof will be omitted. In addition, in the example of FIG. 4, when the detection device 22A detects refrigerant leakage, the indoor unit 2A in the air conditioning area A transmits a leakage detection signal to the other indoor units 2B and 2C (step S107 in FIG. 3). Omit and stop operation.
　また、空調エリアＢの検知装置２２Ｂは、他の空調エリアＡ，Ｃの漏洩通知回路２５が開いているか閉じているかを常に監視する。検知装置２２Ｂは、空調エリアＡの漏洩通知回路２５が閉じていることを検出すると（ステップＳ２００）、リモコン２１Ｂに漏洩検知信号を送信する（ステップＳ２０１）。このとき、検知装置２２Ｂは、他の空調エリアＡで検知されたことが識別可能となるように、自機が冷媒の漏洩を検知した場合と異なる信号（他エリア漏洩検知信号）を生成して送信してもよい。 Furthermore, the detection device 22B in the air conditioning area B always monitors whether the leak notification circuits 25 in the other air conditioning areas A and C are open or closed. When the detection device 22B detects that the leakage notification circuit 25 in the air-conditioned area A is closed (step S200), it transmits a leakage detection signal to the remote controller 21B (step S201). At this time, the detection device 22B generates a signal (other area leak detection signal) that is different from when the own device detects a refrigerant leak so that it can be identified that the refrigerant leak has been detected in another air conditioned area A. You can also send it.
　リモコン２１Ｂは、検知装置２２Ｂから他エリア漏洩検知信号を受信すると、これを室内機２Ｂに送信する（ステップＳ２０２）。 When the remote control 21B receives the other area leakage detection signal from the detection device 22B, it transmits it to the indoor unit 2B (step S202).
　室内機２Ｂは、リモコン２１Ｂから他エリア漏洩検知信号を受信すると、運転を停止する（ステップＳ２０３）。 When the indoor unit 2B receives the other area leakage detection signal from the remote controller 21B, it stops operating (step S203).
　なお、図示は略すが、空調エリアＣの室内機２Ｃ、リモコン２１Ｃ、および検知装置２２Ｃについても、空調エリアＢの各機器と同じ処理を実行する。 Although not shown, the indoor unit 2C, remote control 21C, and detection device 22C in the air conditioning area C perform the same processing as each device in the air conditioning area B.
　このようにすることで、空調システム１００は、室内機２間での漏洩検知信号を送受信不要とすることができる。また、各室内機２は、漏洩通知回路２５の状態から他の空調エリアでの冷媒の漏洩の有無を迅速に検知して、適切に運転を停止することができる。 By doing so, the air conditioning system 100 can eliminate the need for transmitting and receiving leakage detection signals between the indoor units 2. In addition, each indoor unit 2 can quickly detect the presence or absence of refrigerant leakage in other air-conditioning areas from the state of the leakage notification circuit 25, and can appropriately stop its operation.
　以上のとおり、本開示に係るいくつかの実施形態を説明したが、これら全ての実施形態は、例として提示したものであり、開示の範囲を限定することを意図していない。これらの実施形態は、その他の様々な形態で実施されることが可能であり、本開示の要旨を逸脱しない範囲で種々の省略、置き換え、変更を行うことができる。これらの実施形態及びその変形は、本開示の範囲や要旨に含まれると同様に、請求の範囲に記載された開示とその均等の範囲に含まれる。 As described above, several embodiments according to the present disclosure have been described, but all these embodiments are presented as examples and are not intended to limit the scope of the disclosure. These embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the present disclosure. These embodiments and their modifications are included within the scope and gist of the present disclosure, as well as within the scope of the disclosure described in the claims and its equivalents.
＜付記＞
　上述の実施形態は、例えば以下のように把握される。 <Additional notes>
The above embodiment can be understood, for example, as follows.
（１）第１の態様によれば、空調システム１００は、室外機１と、複数の室内機２と、室外機１および室内機２の間で冷媒を流通させる冷媒配管３と、複数の室内機２それぞれが担当する空調エリアに設けられ、空調エリアへの冷媒の漏洩を検知する冷媒センサ２２０と、冷媒センサ２２０が冷媒の漏洩を検知した場合に漏洩通知回路２５を閉じるリレー２２１と、を有する検知装置２２と、冷媒配管３に設けられる遮断弁４０と、漏洩通知回路２５に接続され、漏洩通知回路２５が閉じた場合に遮断弁４０を閉じる制御部４１と、を有する遮断弁装置４と、を備える。 (1) According to the first aspect, the air conditioning system 100 includes an outdoor unit 1, a plurality of indoor units 2, a refrigerant pipe 3 that circulates refrigerant between the outdoor unit 1 and the indoor units 2, and a plurality of indoor units 2. A refrigerant sensor 220 that is provided in the air conditioning area that each machine 2 is in charge of and detects leakage of refrigerant into the air conditioning area, and a relay 221 that closes the leak notification circuit 25 when the refrigerant sensor 220 detects refrigerant leakage. A cutoff valve device 4 having a detection device 22 having a detection device 22, a cutoff valve 40 provided in a refrigerant pipe 3, and a control unit 41 connected to a leakage notification circuit 25 and closing the cutoff valve 40 when the leakage notification circuit 25 is closed. and.
　このようにすることで、空調システム１００は、検知装置２２のリレー２２１で漏洩通知回路２５のオンとオフとを切り替える簡易な構成で、冷媒の漏洩の有無を遮断弁装置４に通知することができる。また、検知装置２２自身が遮断弁装置４に冷媒の漏洩を検知したことを通知可能であるため、室内機２の基板に遮断弁装置４に冷媒の漏洩を通知するための通信回路などを追加する必要がない。したがって、空調システム１００は、既存の室内機２を利用した合理的な構成とすることができる。また、検知装置２２と遮断弁装置４との間に漏洩通知回路２５を設けるのみの簡易な構成であるため、１台の室外機１および遮断弁装置４に、室内機２を何台でも接続することが可能である。 By doing so, the air conditioning system 100 has a simple configuration in which the leak notification circuit 25 is switched on and off using the relay 221 of the detection device 22, and can notify the shutoff valve device 4 of the presence or absence of a refrigerant leak. can. In addition, since the detection device 22 itself can notify the shutoff valve device 4 that refrigerant leakage has been detected, a communication circuit etc. for notifying the shutoff valve device 4 of refrigerant leakage is added to the board of the indoor unit 2. There's no need to. Therefore, the air conditioning system 100 can have a rational configuration using the existing indoor unit 2. In addition, since it has a simple configuration that only requires the leak notification circuit 25 to be provided between the detection device 22 and the shutoff valve device 4, any number of indoor units 2 can be connected to one outdoor unit 1 and the shutoff valve device 4. It is possible to do so.
（２）第２の態様によれば、第１の態様に係る空調システム１００は、複数の空調エリアそれぞれに設けられ、空調エリア内に設置される室内機２および検知装置２２の双方と通信可能に接続されるリモートコントローラ２１をさらに備え、リモートコントローラ２１は、検知装置２２が冷媒の漏洩を検知した場合に、漏洩検知信号を室内機２に送信し、室内機２は、漏洩検知信号を受信した場合に運転を停止する。 (2) According to the second aspect, the air conditioning system 100 according to the first aspect is provided in each of the plurality of air conditioning areas and can communicate with both the indoor unit 2 and the detection device 22 installed in the air conditioning area. The remote controller 21 transmits a leak detection signal to the indoor unit 2 when the detection device 22 detects a refrigerant leak, and the indoor unit 2 receives the leak detection signal. Stop operation if
　このようにすることで、空調システム１００は、冷媒の漏洩が検知された場合に、速やかに室内機２の運転を停止することができる。また、室内機２および検知装置２２と漏洩検知信号を送受信するためのリモコン通信線２３は、既存のものを利用することが可能である。 By doing so, the air conditioning system 100 can promptly stop the operation of the indoor unit 2 when leakage of refrigerant is detected. Furthermore, an existing remote control communication line 23 for transmitting and receiving leakage detection signals to and from the indoor unit 2 and the detection device 22 can be used.
（３）第３の態様によれば、第２の態様に係る空調システム１００において、室内機２は、リモートコントローラ２１から漏洩検知信号を受信した場合に、複数の室内機２それぞれを互いに通信可能に接続する通信線２４を介して、他の室内機２に漏洩検知信号を送信する。 (3) According to the third aspect, in the air conditioning system 100 according to the second aspect, when the indoor units 2 receive a leakage detection signal from the remote controller 21, each of the plurality of indoor units 2 can communicate with each other. A leakage detection signal is transmitted to other indoor units 2 via a communication line 24 connected to the indoor unit 2.
　このようにすることで、各室内機２は、自機の担当外の空調エリアで冷媒の漏洩が発生した場合であっても、適切に運転を停止することができる。 By doing so, each indoor unit 2 can appropriately stop its operation even if refrigerant leakage occurs in an air conditioning area that is not in charge of the indoor unit 2.
（４）第４の態様によれば、第２の態様に係る空調システム１００において、検知装置２２は、他の検知装置２２の漏洩通知回路２５が閉じた場合に、他の空調エリアにおける冷媒の漏洩を検知し、リモートコントローラ２１は、検知装置２２が他の空調エリアにおける冷媒の漏洩を検知した場合に、漏洩検知信号を室内機２に送信する。 (4) According to the fourth aspect, in the air conditioning system 100 according to the second aspect, the detection device 22 detects the leakage of refrigerant in another air conditioning area when the leakage notification circuit 25 of the other detection device 22 is closed. The remote controller 21 detects leakage and transmits a leakage detection signal to the indoor unit 2 when the detection device 22 detects a leakage of refrigerant in another air-conditioned area.
　このようにすることで、空調システム１００は、室内機２間での漏洩検知信号を送受信不要とすることができる。また、各室内機２は、漏洩通知回路２５の状態から他の空調エリアでの冷媒の漏洩の有無を迅速に検知して、適切に運転を停止することができる。 By doing so, the air conditioning system 100 can eliminate the need for transmitting and receiving leakage detection signals between the indoor units 2. In addition, each indoor unit 2 can quickly detect the presence or absence of refrigerant leakage in other air-conditioning areas from the state of the leakage notification circuit 25, and can appropriately stop its operation.
（５）第５の態様によれば、第２から第４の何れか一の態様に係る空調システム１００において、リモートコントローラ２１は、検知装置２２が冷媒の漏洩を検知した場合に警報を出力する。 (5) According to the fifth aspect, in the air conditioning system 100 according to any one of the second to fourth aspects, the remote controller 21 outputs an alarm when the detection device 22 detects refrigerant leakage. .
　このようにすることで、リモコン２１は、自機が設けられた空調エリア内の人間に、冷媒の漏洩を伝達することができる。 By doing so, the remote controller 21 can notify the person in the air-conditioned area where the remote controller 21 is located that there is a refrigerant leak.
（６）第６の態様によれば、室外機１と、複数の室内機２と、室外機１および室内機２の間で冷媒を流通させる冷媒配管３と、を備える空調システム１００の制御方法は、複数の室内機２それぞれが担当する空調エリアに設けられた冷媒センサ２２０により、空調エリアへの冷媒の漏洩を検知するステップと、冷媒センサ２２０が冷媒の漏洩を検知した場合にリレー２２１により漏洩通知回路２５を閉じるステップと、漏洩通知回路２５が閉じた場合に、冷媒配管３に設けられた遮断弁４０を閉じるステップと、を有する。 (6) According to the sixth aspect, a method for controlling an air conditioning system 100 including an outdoor unit 1, a plurality of indoor units 2, and a refrigerant pipe 3 that circulates a refrigerant between the outdoor unit 1 and the indoor units 2. The steps include a step of detecting leakage of refrigerant into the air conditioning area using a refrigerant sensor 220 provided in the air conditioning area handled by each of the plurality of indoor units 2; The method includes a step of closing the leak notification circuit 25, and a step of closing the cutoff valve 40 provided in the refrigerant pipe 3 when the leak notification circuit 25 is closed.
　上述した一態様によれば、簡易な構成で冷媒の漏洩を検知することができる。 According to one aspect described above, refrigerant leakage can be detected with a simple configuration.
１００　空調システム
１　室外機
２，２Ａ，２Ｂ，２Ｃ　室内機
２１，２１Ａ，２１Ｂ，２１Ｃ　リモートコントローラ（リモコン）
２２，２２Ａ，２２Ｂ，２２Ｃ　検知装置
２２０　冷媒センサ
２２１　リレー
２２２　ＣＰＵ
２３，２３Ａ，２３Ｂ，２３Ｃ　リモコン通信線
２４　室内室外通信線（通信線）
２５　漏洩通知回路
３　冷媒配管
４　遮断弁装置
４０　遮断弁
４１　ＣＰＵ（制御部） 100 Air conditioning system 1 Outdoor units 2, 2A, 2B, 2C Indoor units 21, 21A, 21B, 21C Remote controller (remote control)
22, 22A, 22B, 22C Detection device 220 Refrigerant sensor 221 Relay 222 CPU
23, 23A, 23B, 23C Remote control communication line 24 Indoor/outdoor communication line (communication line)
25 Leakage notification circuit 3 Refrigerant piping 4 Shutoff valve device 40 Shutoff valve 41 CPU (control unit)

Claims (6)

  1. 　室外機と、
    　複数の室内機と、
    　前記室外機および前記室内機の間で冷媒を流通させる冷媒配管と、
    　複数の前記室内機それぞれが担当する空調エリアに設けられ、前記空調エリアへの前記冷媒の漏洩を検知する冷媒センサと、前記冷媒センサが前記冷媒の漏洩を検知した場合に漏洩通知回路を閉じるリレーと、を有する検知装置と、
    　前記冷媒配管に設けられる遮断弁と、前記漏洩通知回路に接続され、前記漏洩通知回路が閉じた場合に前記遮断弁を閉じる制御部と、を有する遮断弁装置と、
    　を備える空調システム。     outdoor unit and
    multiple indoor units,
    refrigerant piping that circulates refrigerant between the outdoor unit and the indoor unit;
    A refrigerant sensor that is provided in an air conditioning area that each of the plurality of indoor units is in charge of and that detects leakage of the refrigerant into the air conditioning area, and a relay that closes a leakage notification circuit when the refrigerant sensor detects leakage of the refrigerant. A detection device having;
    A cutoff valve device comprising: a cutoff valve provided in the refrigerant pipe; and a control unit connected to the leakage notification circuit and closing the cutoff valve when the leakage notification circuit is closed;
    Air conditioning system with.
  2. 　複数の前記空調エリアそれぞれに設けられ、前記空調エリア内に設置される前記室内機および前記検知装置の双方と通信可能に接続されるリモートコントローラをさらに備え、
    　前記リモートコントローラは、前記検知装置が前記冷媒の漏洩を検知した場合に、漏洩検知信号を前記室内機に送信し、
    　前記室内機は、前記漏洩検知信号を受信した場合に運転を停止する、
    　請求項１に記載の空調システム。     Further comprising a remote controller provided in each of the plurality of air conditioned areas and communicably connected to both the indoor unit and the detection device installed in the air conditioned area,
    The remote controller transmits a leakage detection signal to the indoor unit when the detection device detects a leakage of the refrigerant,
    The indoor unit stops operation when receiving the leakage detection signal.
    The air conditioning system according to claim 1.
  3. 　前記室内機は、前記リモートコントローラから前記漏洩検知信号を受信した場合に、複数の前記室内機それぞれを互いに通信可能に接続する通信線を介して、他の室内機に漏洩検知信号を送信する、
    　請求項２に記載の空調システム。     When the indoor unit receives the leakage detection signal from the remote controller, the indoor unit transmits the leakage detection signal to other indoor units via a communication line that communicably connects each of the plurality of indoor units.
    The air conditioning system according to claim 2.
  4. 　前記検知装置は、他の検知装置の漏洩通知回路が閉じた場合に、他の空調エリアにおける前記冷媒の漏洩を検知し、
    　前記リモートコントローラは、前記検知装置が他の空調エリアにおける前記冷媒の漏洩を検知した場合に、前記漏洩検知信号を前記室内機に送信する、
    　請求項２に記載の空調システム。     The detection device detects a leak of the refrigerant in another air conditioning area when a leak notification circuit of another detection device is closed,
    The remote controller transmits the leakage detection signal to the indoor unit when the detection device detects a leakage of the refrigerant in another air-conditioned area.
    The air conditioning system according to claim 2.
  5. 　前記リモートコントローラは、前記検知装置が前記冷媒の漏洩を検知した場合に警報を出力する、
    　請求項２から４の何れか一項に記載の空調システム。     The remote controller outputs an alarm when the detection device detects leakage of the refrigerant.
    An air conditioning system according to any one of claims 2 to 4.
  6. 　室外機と、複数の室内機と、前記室外機および前記室内機の間で冷媒を流通させる冷媒配管と、を備える空調システムの制御方法であって、
    　複数の室内機それぞれが担当する空調エリアに設けられた冷媒センサにより、前記空調エリアへの前記冷媒の漏洩を検知するステップと、
    　前記冷媒センサが前記冷媒の漏洩を検知した場合にリレーにより漏洩通知回路を閉じるステップと、
    　前記漏洩通知回路が閉じた場合に、前記冷媒配管に設けられた遮断弁を閉じるステップと、
    　を有する空調システムの制御方法。     A method for controlling an air conditioning system comprising an outdoor unit, a plurality of indoor units, and refrigerant piping that circulates a refrigerant between the outdoor unit and the indoor unit, the method comprising:
    Detecting leakage of the refrigerant into the air conditioning area using a refrigerant sensor provided in the air conditioning area that each of the plurality of indoor units is in charge of;
    closing a leak notification circuit by a relay when the refrigerant sensor detects a leak of the refrigerant;
    closing a shutoff valve provided in the refrigerant pipe when the leakage notification circuit is closed;
    A method for controlling an air conditioning system.
PCT/JP2023/011453 2022-04-14 2023-03-23 Air conditioning system and method for controlling air conditioning system WO2023199719A1 (en)

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Citations (4)

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WO2017002215A1 (en) * 2015-06-30 2017-01-05 三菱電機株式会社 Refrigerant leak detection system
WO2017163321A1 (en) * 2016-03-23 2017-09-28 三菱電機株式会社 Refrigeration cycle device
JP2018091550A (en) * 2016-12-02 2018-06-14 三菱電機株式会社 Air conditioner
WO2021157395A1 (en) * 2020-02-05 2021-08-12 ダイキン工業株式会社 Air-conditioning system

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Publication number Priority date Publication date Assignee Title
WO2017002215A1 (en) * 2015-06-30 2017-01-05 三菱電機株式会社 Refrigerant leak detection system
WO2017163321A1 (en) * 2016-03-23 2017-09-28 三菱電機株式会社 Refrigeration cycle device
JP2018091550A (en) * 2016-12-02 2018-06-14 三菱電機株式会社 Air conditioner
WO2021157395A1 (en) * 2020-02-05 2021-08-12 ダイキン工業株式会社 Air-conditioning system

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