Air conditioning unit

Abstract

An air conditioning device (1) includes a refrigerant circuit (6), including a connecting portion (85), a circuit forming portion (97), a first component (110), and a control portion (22). The connecting portion is connected to a first electric wire (91) and a second electric wire (92), the first electric wire being connected to a first device (80) among a plurality of safety devices, the second electric wire being connected to a second device (90) among a plurality of safety devices that is different from the first device, the plurality of safety devices including at least two of a refrigerant detector, an alarm device, a shutoff valve, and a ventilation device. The circuit forming portion and the first electric wire and the second electric wire connected to the connecting portion together form an interlocking circuit (98). The first component is capable of forming a first circuit (99) including at least a portion of the circuit forming portion without passing through the first electric wire and the second electric wire. When no current flows in either the interlocking circuit or the first circuit, the control portion prohibits the operation of the air conditioning device.

Description

Technical Field

[0001] The present disclosure relates to an air conditioning device. Background Art

[0002] Sometimes, various safety devices are provided for air conditioning devices to counter refrigerant leakage. For example, Patent Document 1 (Japanese Patent Publication No. 2019-52785) discloses an air conditioning system including a refrigerant detector, an alarm device, and a shutoff valve as safety devices. Summary of the invention

[0003] Technical problem to be solved by the invention

[0004] For such an air conditioning system, when refrigerant leaks during operation of the air conditioning device, a higher reliability is required to make the safety device work reliably. Therefore, it is conceivable to use an interlock in the air conditioning device to prohibit the operation of the air conditioning device when the safety device cannot be operated.

[0005] On the other hand, however, there is sometimes no particular need for a safety device depending on the amount of refrigerant charged in the air conditioner, etc. However, since there is also the possibility of using multiple safety devices together, there is a problem in the air conditioner using interlocks: when the interlock is released for each safety device when the safety device is not used, the amount of work during installation increases.

[0006] Technical solutions adopted to solve technical problems

[0007] The air conditioning device of the first viewpoint is an air conditioning device including a refrigerant circuit, including a connecting portion, a circuit forming portion, a first component and a control portion. The connecting portion is connected to a first electric wire and a second electric wire, the first electric wire is connected to a first device among a plurality of safety devices, and the second electric wire is connected to a second device among a plurality of safety devices. The plurality of safety devices include at least two of a refrigerant detector, an alarm device, a shut-off valve and a ventilation device. The second device is of a different type from the first device. The circuit forming portion and the first electric wire connected to the connecting portion together form an interlocking circuit. The first component is capable of forming a first circuit including at least a portion of the circuit forming portion without passing through the first electric wire and the second electric wire. When no current flows in either the interlocking circuit or the first circuit, the control portion prohibits the operation of the air conditioning device.

[0008] In addition, the situation where no current flows in the interlocking circuit includes the situation where there is no interlocking circuit, and also includes the situation where a part of the interlocking circuit is disconnected, or a part of the interlocking circuit is disconnected from the wire. The situation where no current flows in the first circuit includes the situation where the first circuit is not formed.

[0009] In the air conditioning apparatus of the first aspect, since the first circuit capable of releasing the interlock of the air conditioning apparatus can be formed by the first member, when the safety device is not used, it is not necessary to release the interlock for each of the plurality of safety devices, thereby improving workability.

[0010] In the air conditioning apparatus according to the first aspect, in the air conditioning apparatus according to the second aspect, the first circuit is a circuit formed by short-circuiting the first portion of the circuit configuration section and the second portion of the circuit configuration section.

[0011] In the air conditioning apparatus according to the second aspect, by short-circuiting the circuit configuration section, interlocks with a plurality of safety devices can be easily released simultaneously.

[0012] In addition to the air conditioning device of any one of the first and second aspects, the air conditioning device of the third aspect includes a mounting portion from which the first member can be mounted and dismounted. The first circuit is formed by removing the first member from the mounting portion.

[0013] In the air conditioning device of the third viewpoint, if the first component is removed, the first circuit can be formed, and the interlock with multiple safety devices can be quickly released. In addition, since the first component is usually installed in the installation portion when the air conditioning device is installed, the possibility of losing the first component can be reduced.

[0014] In addition to the air conditioning device of any one of the first and second aspects, an air conditioning device of a fourth aspect includes a mounting portion from which the first member can be mounted and detached. The first circuit is formed by mounting the first member to the mounting portion.

[0015] In the air conditioning apparatus according to the fourth aspect, when the first member is attached, the first circuit can be formed, and interlocks with a plurality of safety devices can be quickly released. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a block diagram of an air conditioning system including the air conditioning device according to an embodiment of the present disclosure.

[0017] Figure 2 yes Figure 1 A schematic diagram of the air conditioning system.

[0018] Figure 3 It is used to illustrate Figure 1 A schematic electrical circuit diagram of the interlocking circuit of an air conditioning unit.

[0019] Figure 3A It is used to illustrate that Figure 3 A schematic electrical circuit diagram of a first circuit which is a part of a circuit component.

[0020] Figure 4 It is used to illustrate Figure 1A schematic electrical circuit diagram of another example of an interlocking circuit of an air-conditioning device.

[0021] Figure 4A It is used to illustrate that Figure 4 An electrical circuit diagram of another example of the first circuit which is a part of the circuit constituent part.

[0022] Figure 5 yes Figure 1 A block diagram of a control unit of an air conditioning device.

[0023] Figure 6 This is a schematic electrical circuit diagram for explaining the interlock circuit and the first circuit of the air conditioning device according to Modification D. DETAILED DESCRIPTION

[0024] An embodiment of the air conditioning device of the present disclosure will be described.

[0025] (1) Air conditioning system

[0026] Reference Figure 1 as well as Figure 2 , an air conditioning system 100 including the air conditioning device 1 according to one embodiment and a plurality of types of safety devices will be described. Figure 1 is a block diagram of the air conditioning system 100 . Figure 1 In FIG. 1 , devices constituting the refrigerant circuit 6 other than the compressor 8 of the heat source unit 2 of the air-conditioning apparatus 1 , the first fan 15 , and the second fan 33 are omitted from illustration. Figure 2 1 is a schematic diagram of the structure of the air conditioning system 100 .

[0027] The air conditioning device 1 is a device that performs cooling or heating of an air-conditioned space by performing a vapor compression refrigeration cycle. The air conditioning device 1 includes a utilization unit 3 and a heat source unit 2 (see Figure 1 ).

[0028] In this embodiment, the plurality of types of safety devices provided in the air conditioning system 100 include four types of safety devices, namely, a refrigerant detector 34, an alarm device 70, a ventilation device 60, and a shutoff valve 50 (see Figure 2 ).

[0029] In addition, in the following, in particular, when describing the interlocking function of the air conditioning device 1, in order to avoid the complexity of the description, the case where the air conditioning system 100 has two types of safety devices (the first device 80 and the second device 90) is described. In the following embodiment, the case where the first device 80 is the refrigerant detector 34 and the second device 90 is the alarm device 70 is mainly described as an example. In addition, the first device 80 and the second device 90 may also be other combinations of multiple types of safety devices.

[0030] (2) Detailed structure

[0031] (2-1) Air conditioning unit

[0032] The air conditioning device 1 is a device that performs cooling and heating of an air-conditioned space by performing a vapor compression refrigeration cycle. The air-conditioned space is, for example, a space in a building such as an office building, a commercial facility, or a residence. In addition, the air conditioning device 1 need not be a device for both cooling and heating of the air-conditioned space, and may be a device for only one of cooling and heating.

[0033] The air conditioning device 1 is configured to electrically connect various safety devices to ensure safety in the event of a refrigerant leak. The air conditioning device 1 has an interlock function. The interlock function here refers to a function that prohibits the start-up and operation of the air conditioning device 1 when the safety devices required by the air conditioning system 100 are not powered and cannot operate.

[0034] However, since the first circuit 99 is formed by the first member 110 described later, the air conditioner 1 is configured to be operable even in a state where the safety device is not connected.

[0035] like Figure 2 as well as Figure 3 As shown, the air conditioner 1 mainly includes a heat source unit 2, a utilization unit 3, a refrigerant communication pipe, and a remote controller 48. The air conditioner 1 also includes a connection portion 85, a circuit configuration portion 97, and a first member 110, and is associated with an interlock function and its release.

[0036] The heat source unit 2 has a heat source unit control device 42. The usage unit 3 has a usage unit control device 44. The remote controller 48 has a remote control device 48a. The heat source unit control device 42, the usage unit control device 44, and the remote control device 48a cooperate to function as a control unit 22 described later.

[0037] The refrigerant communication pipes include a liquid refrigerant communication pipe 4 and a gas refrigerant communication pipe 5. The liquid refrigerant communication pipe 4 and the gas refrigerant communication pipe 5 are refrigerant communication pipes that connect the heat source side unit 2 and the utilization side unit 3. In the air conditioning device 1, the heat source side unit 2 and the utilization side unit 3 are connected through the refrigerant communication pipes 4 and 5, thereby forming a refrigerant circuit 6.

[0038] Although not limited, the refrigerant sealed in the refrigerant circuit 6 is a flammable refrigerant. The flammable refrigerant includes refrigerants that meet Class 3 (strong flammability), Class 2 (weak flammability), and Subclass 2L (slightly flammable) under the ASHRAE 34 refrigerant naming and safety classification standard in the United States or the ISO 817 refrigerant naming and safety classification standard.

[0039] For example, as the refrigerant, any one of R1234yf, R1234ze(E), R516A, R445A, R444A, R454C, R444B, R454A, R455A, R457A, R459B, R452B, R454B, R447B, R32, R447A, R446A and R459A is used.

[0040] The refrigerant used in this embodiment is R32. In addition, the structure of the present disclosure is also useful when the refrigerant is not flammable.

[0041] Air conditioning device 1 Figure 2 As shown in FIG. 1 , the air conditioning device 1 has a heat source unit 2. Figure 2 As shown, the air conditioner 1 includes one utilization unit 3. However, the air conditioner 1 may include a plurality of utilization units 3 connected in parallel to the heat source side unit 2. Furthermore, the air conditioner 1 may include a plurality of heat source units 2.

[0042] The heat source unit 2, the utilization unit 3, the refrigerant communication pipes 4 and 5, and the control unit 22 are described in detail below. In addition, the circuit component 97, the connection portion 85, the mounting portion 25, and the first member 110 related to the interlocking function and the release of the interlocking function of the air conditioning device 1 are described in detail below.

[0043] (2-1-1) Heat source unit

[0044] Reference Figure 2 An example of the structure of the heat source unit 2 will be described.

[0045] The heat source unit 2 is installed outside the air-conditioning target space, for example, on the roof of a building, near the wall surface of a building, or the like.

[0046] The heat source unit 2 mainly includes a storage tank 7, a compressor 8, a flow direction switching mechanism 10, a heat source heat exchanger 16, a first expansion mechanism 12, a first stop valve 13 and a second stop valve 14, a first fan 15 (see Figure 2 ). In addition, the heat source unit 2 may not have a part of the equipment described here. For example, when the air conditioning device 1 only cools the air-conditioned space, the heat source unit 2 may not have the flow switching mechanism 10. In addition, the heat source unit 2 may also have equipment other than that described here as needed.

[0047] The heat source unit 2 mainly includes a suction pipe 17, a discharge pipe 18, a first gas refrigerant pipe 19, a liquid refrigerant pipe 20, and a second gas refrigerant pipe 21 (see FIG. 1 ). Figure 2). The suction pipe 17 connects the flow switching mechanism 10 to the suction side of the compressor 8. The storage tank 7 is provided on the suction pipe 17. The discharge pipe 18 connects the discharge side of the compressor 8 to the flow switching mechanism 10. The first gas refrigerant pipe 19 connects the flow switching mechanism 10 to the gas side of the heat source heat exchanger 16. The liquid refrigerant pipe 20 connects the liquid side of the heat source heat exchanger 16 to the first stop valve 13. The first expansion mechanism 12 is provided on the liquid refrigerant pipe 20. The second gas refrigerant pipe 21 connects the flow switching mechanism 10 to the second stop valve 14.

[0048] The compressor 8 is a device that sucks low-pressure refrigerant in the refrigeration cycle from the suction pipe 17 , compresses the refrigerant using a compression mechanism (not shown), and discharges the compressed refrigerant to the discharge pipe 18 .

[0049] The flow direction switching mechanism 10 changes the state of the refrigerant circuit 6 between the first state and the second state by switching the flow direction of the refrigerant. In the present embodiment, the flow direction switching mechanism 10 is a four-way reversing valve, but it is not limited to this, and may also be composed of a plurality of valves and pipes. When the refrigerant circuit 6 is in the first state, the heat source heat exchanger 16 functions as a heat radiator (condenser) of the refrigerant, and the utilization side heat exchanger 32 functions as an evaporator of the refrigerant. When the refrigerant circuit 6 is in the second state, the heat source heat exchanger 16 functions as an evaporator of the refrigerant, and the utilization heat exchanger 32 functions as a heat radiator of the refrigerant. When the flow direction switching mechanism 10 sets the state of the refrigerant circuit 6 to the first state, the flow direction switching mechanism 10 connects the suction pipe 17 with the second gas refrigerant pipe 21, and connects the discharge pipe 18 with the first gas refrigerant pipe 19 (refer to Figure 2 When the flow direction switching mechanism 10 sets the state of the refrigerant circuit 6 to the second state, the flow direction switching mechanism 10 connects the suction pipe 17 to the first gas refrigerant pipe 19 and connects the discharge pipe 18 to the second gas refrigerant pipe 21 (see Figure 2 The dotted line in the flow direction switching mechanism 10).

[0050] The heat source heat exchanger 16 is a device that performs heat exchange between the refrigerant flowing inside and the air (heat source air) at the installation location of the heat source unit 2. The type of the heat source heat exchanger 16 is not limited, and for example, it can be a fin-tube type heat exchanger having a plurality of heat transfer tubes and fins not shown. One end of the heat source heat exchanger 16 is connected to the first gas refrigerant pipe 19. The other end of the heat source heat exchanger 16 is connected to the liquid refrigerant pipe 20.

[0051] The first expansion mechanism 12 is arranged between the heat source heat exchanger 16 and the utilization heat exchanger 32 in the refrigerant circuit 6. The first expansion mechanism 12 is arranged in the liquid refrigerant pipe 20 between the heat source heat exchanger 16 and the first stop valve 13. The first expansion mechanism 12 regulates the pressure and flow rate of the refrigerant flowing in the liquid refrigerant pipe 20. In the present embodiment, the first expansion mechanism 12 is an electronic expansion valve with a variable opening. However, the first expansion mechanism 12 may also be a temperature-sensitive cylinder-type expansion valve, a capillary tube, etc.

[0052] The accumulator 7 is a container having a gas-liquid separation function of separating the inflowing refrigerant into a gas refrigerant and a liquid refrigerant. In addition, the accumulator 7 is a container having a storage function of storing excess refrigerant generated due to fluctuations in the operating load or the like.

[0053] The first stop valve 13 is a valve provided at a connection portion between the liquid refrigerant pipe 20 and the liquid refrigerant communication pipe 4. The second stop valve 14 is a valve provided at a connection portion between the second gas refrigerant pipe 21 and the gas refrigerant communication pipe 5. The first stop valve 13 and the second stop valve 14 are opened when the air conditioner 1 is in operation.

[0054] The first fan 15 is a fan for sucking the heat source air outside the heat source unit 2 into the housing of the heat source side unit 2 (not shown) and supplying it to the heat source heat exchanger 16, and for discharging the air after heat exchange with the refrigerant in the heat source heat exchanger 16 to the outside of the housing of the heat source unit 2. The first fan 15 is, for example, a propeller fan. However, the fan type of the first fan 15 is not limited to a propeller fan, and any fan type may be selected as appropriate.

[0055] (2-1-2) Utilization Unit

[0056] Reference Figure 2 An example of the configuration of the utilization unit 3 will be described.

[0057] The utilization unit 3 is, for example, a unit installed in the air-conditioned space. The utilization unit 3 is, for example, a ceiling embedded unit, or a ceiling suspended, wall-mounted, or floor-standing unit. In addition, the utilization unit 3 may also be installed outside the air-conditioned space. For example, the utilization unit 3 may also be installed in an attic, a machine room, etc. In this case, an air passage is provided for supplying the air that has undergone heat exchange with the refrigerant in the utilization heat exchanger 32 from the utilization unit 3 to the air-conditioned space. The air passage is, for example, a pipe. However, the type of the air passage is not limited to the pipe, and may be selected appropriately.

[0058] The utilization unit 3 mainly includes a second expansion mechanism 31, a utilization heat exchanger 32, and a second fan 33 (see Figure 2 ).

[0059] The second expansion mechanism 31 is arranged between the heat source heat exchanger 16 and the utilization heat exchanger 32 in the refrigerant circuit 6. The second expansion mechanism 31 is arranged in the refrigerant piping that connects the utilization heat exchanger 32 to the liquid refrigerant communication piping 4. The second expansion mechanism 31 adjusts the pressure and flow rate of the refrigerant flowing in the refrigerant piping. In the present embodiment, the second expansion mechanism 31 is an electronic expansion valve with a variable opening, but it is not limited to this.

[0060] In the heat exchanger 32, heat exchange is performed between the refrigerant flowing through the heat exchanger 32 and the air in the air-conditioning target space. The type of the heat exchanger 32 is not limited, and for example, it is a fin-tube type heat exchanger having a plurality of heat transfer tubes and fins (not shown). One end of the heat exchanger 32 is connected to the liquid refrigerant communication pipe 4 through a refrigerant pipe. The other end of the heat exchanger 32 is connected to the gas refrigerant communication pipe 5 through a refrigerant pipe.

[0061] The second fan 33 is a mechanism that sucks air in the air-conditioned space into a casing (not shown) of the utilization unit 3 and supplies the air to the utilization heat exchanger 32, and blows the air, which has undergone heat exchange with the refrigerant in the utilization heat exchanger 32, out to the air-conditioned space. The second fan 33 is, for example, a turbo fan. However, the type of the second fan 33 is not limited to a turbo fan, and any type may be selected as appropriate.

[0062] (2-1-3) Liquid refrigerant communication piping and gas refrigerant communication piping

[0063] The liquid refrigerant communication pipe 4 and the gas refrigerant communication pipe 5 are refrigerant communication pipes that connect the heat source unit 2 and the utilization unit 3. The liquid refrigerant communication pipe 4 is provided with a first stop valve 54 of the stop valve 50. The gas refrigerant communication pipe 5 is provided with a second stop valve 56 of the stop valve 50.

[0064] The first shutoff valve 54 and the second shutoff valve 56 are not limited, and may be, for example, a solenoid valve or an electric valve. If the first shutoff valve 54 is closed, the refrigerant can be prevented from flowing from the heat source unit 2 side into the utilization unit 3 through the first shutoff valve 54 via the liquid refrigerant communication pipe 4. If the second shutoff valve 56 is closed, the refrigerant can be prevented from flowing from the heat source unit 2 side into the utilization unit 3 through the second shutoff valve 56 via the gas refrigerant communication pipe 5.

[0065] (2-1-4) Control Unit

[0066] The control unit 22 is composed of a heat source unit control device 42, a utilization unit control device 44, and a remote control device 48a. In other words, the heat source unit control device 42, the utilization unit control device 44, and the remote control device 48a work together to function as the control unit 22. In addition, the control unit 22 as a whole can function in the manner described below. Therefore, below, the action performed by any one of the heat source unit control device 42, the utilization unit control device 44, and the remote control device 48a can also be performed by other control devices 42, 44, 48a within the range of no contradiction. In addition, part of the functions of the control unit 22 described below can also be performed by other control devices that are separately provided from the heat source unit control device 42, the utilization unit control device 44, and the remote control device 48a.

[0067] The control unit 22 is configured by connecting the heat source unit control device 42, the unit control device 42, and the remote control device 48a via a communication line 46 (see Figure 5 ).

[0068] The control unit 22 mainly includes a microcontroller unit (MCU), various electrical circuits, and electronic circuits to control the actions of various devices of the air-conditioning device 1. The MCU includes a CPU, a memory, an I / O interface, etc. The memory of the MCU stores various programs for execution by the CPU of the MCU. In addition, the various functions of the control unit 22 described below can be implemented by hardware, by software, or by the collaborative work of hardware and software. The control unit 22 controls the actions of various devices of the air-conditioning device 1 according to the instructions input to the remote control 48, the measurement values ​​of various sensors set in the heat source side unit 2, and the utilization unit 3.

[0069] For example, during cooling operation, the control unit 22 controls the action of the flow switching mechanism 10 to switch the state of the refrigerant circuit 6 to the first state, in which the heat source heat exchanger 16 acts as a heat radiator of the refrigerant, and the heat exchanger 32 acts as an evaporator of the refrigerant. During cooling operation, the control unit 22 operates the compressor 8, the first fan 15, and the second fan 33. In addition, during cooling operation, the control unit 22 adjusts the speed of the motors of the compressor 8, the first fan 15, and the second fan 33 according to the measurement values ​​of various sensors, the set temperature, etc., and adjusts the opening of the electronic expansion valve, which is an example of the first expansion mechanism 12 and the second expansion mechanism 31, to a specified opening.

[0070] In addition, during the heating operation, the control unit 22 controls the action of the flow switching mechanism 10 to switch the state of the refrigerant circuit 6 to the second state, in which the heat source heat exchanger 16 functions as an evaporator of the refrigerant, and the heat exchanger 32 functions as a heat radiator of the refrigerant. During the heating operation, the control unit 22 operates the compressor 8, the first fan 15, and the second fan 33. In addition, during the heating operation, the control unit 22 adjusts the speed of the motors of the compressor 8, the first fan 15, and the second fan 33 according to the measurement values ​​of various sensors, the set temperature, etc., and adjusts the opening of the electronic expansion valve, which is an example of the first expansion mechanism 12 and the second expansion mechanism 31, to a specified opening.

[0071] As various control methods are generally known, the specific control of the operations of various devices of the air-conditioning apparatus 1 during the cooling operation and the heating operation will be omitted here to avoid complicating the description.

[0072] In addition, the control unit 22 determines the leakage of the refrigerant based on the detection signal output by the refrigerant detector 34. When it is determined that the refrigerant is leaking, the control unit 22 sends a signal for executing the action when the refrigerant leakage is detected to the alarm device 70, the ventilation device 60, and the shutoff valve 50 as safety devices. In addition, when it is determined that the refrigerant is leaking, the control unit 22 prohibits or stops the operation of the air conditioning device 1.

[0073] Hereinafter, the heat source unit control device 42 and the unit control device 44 and the remote controller 48 having the remote control device 48a will be described in detail.

[0074] (2-1-4-1) Heat source unit control device

[0075] The heat source unit control device 42 mainly includes a microcontroller unit (MCU), various electrical circuits, and electronic circuits to control various devices of the heat source unit 2. The MCU includes a CPU, a memory, an I / O interface, etc. The memory of the MCU stores various programs for execution by the CPU of the MCU. In addition, the various functions of the heat source unit control device 42 described below can be implemented by hardware, can be implemented by software, and can also be implemented by the collaborative work of hardware and software.

[0076] The heat source unit control device 42 is electrically connected to various devices of the heat source unit 2 including the compressor 8, the flow direction switching mechanism 10, the first expansion mechanism 12, and the first fan 15 (see Figure 2). In addition, the heat source unit control device 42 is electrically connected to a sensor (not shown) provided in the heat source unit 2. Although not limited, the sensor includes a temperature sensor provided in the discharge pipe 18 and the suction pipe 17, a pressure sensor, a temperature sensor provided in the heat source heat exchanger 16, a temperature sensor provided in the liquid refrigerant pipe 20, a temperature sensor for measuring the temperature of the heat source air, and the like.

[0077] The heat source unit control device 42 is connected to the utilization unit control device 44 via a communication line 46. The heat source unit control device 42 and the utilization unit control device 44 exchange control signals of the air conditioner 1 via the communication line 46, thereby functioning as the control unit 22 that controls the operation of the air conditioner 1. The control signal of the air conditioner 1 is a signal for controlling various devices of the air conditioner 1.

[0078] In addition, when receiving the operation prohibition signal sent from the utilization unit control device 44 through the communication line 46, the heat source unit control device 42 performs operation prohibition control for various devices of the heat source unit 2. The operation prohibition signal will be described later. The operation prohibition control performed by the heat source unit control device 42 is a control that prohibits at least the operation of the compressor 8. In addition, under the operation prohibition control performed by the heat source unit control device 42, in addition to prohibiting the operation of the compressor 8, the operation of the first fan 15 can also be prohibited. In this embodiment, as the operation prohibition control, the heat source unit control device 42 prohibits the operation of the compressor 8 and the first fan 15.

[0079] Specifically, as the operation prohibition control, the heat source unit control device 42 prohibits the start of the compressor 8 and the first fan 15 of the heat source unit 2 that are stopped. In addition, as the operation prohibition control, the heat source unit control device 42 may also stop the compressor 8 and the first fan 15 of the heat source unit 2 that are in operation. As the operation prohibition control, when the compressor 8 and the first fan 15 of the heat source side unit 2 that are in operation are stopped, the heat source unit control device 42 may also stop the compressor 8 and the first fan 15 in the same manner as when the normal air conditioning operation is stopped. Alternatively, as the operation prohibition control, when the compressor 8 and the first fan 15 of the heat source unit 2 that are in operation are stopped, the heat source unit control device 42 may also stop the compressor 8 and the first fan 15 in a manner different from when the normal air conditioning operation is stopped.

[0080] In addition, when receiving the leakage detection signal sent from the unit control device 44 through the communication line 46, the heat source unit control device 42 performs leakage control for various devices of the heat source unit 2. The leakage detection signal will be described later. The leakage control performed by the heat source unit control device 42 is, for example, a control to prohibit the compressor 8 and the first fan 15 of the heat source unit 2 that are stopped from starting. In addition, the leakage control performed by the heat source unit control device 42 is a control to stop the compressor 8 and the first fan 15 of the heat source unit 2 that are in operation. As the leakage control, it is also possible that when the compressor 8 and the first fan 15 of the heat source unit 2 that are in operation are stopped, the heat source unit control device 42 can also stop the compressor 8 and the first fan 15 in the same way as when the normal air conditioning operation is stopped or in the same way as when the operation is prohibited. Alternatively, the heat source unit control device 42 can also stop the compressor 8 and the first fan 15 in a different way from the normal air conditioning operation stop and operation prohibition control.

[0081] (2-1-4-2) Using the unit control device

[0082] The unit control device 44 includes a microcontroller unit (MCU), various electrical circuits, and electronic circuits. The MCU includes a CPU, a memory, an I / O interface, etc. The memory of the MCU stores various programs for execution by the CPU of the MCU. In addition, the various functions of the unit control device 44 described below can be implemented by hardware, software, or by the collaborative work of hardware and software. In addition, a part of the various functions of the unit control device 44 described below can also be executed by a control device that is separately provided from the unit control device 44.

[0083] The utilization unit control device 44 is electrically connected to various devices of the utilization unit 3 including the second expansion mechanism 31 and the second fan 33, and controls the various devices of the utilization unit 3. (See Figure 2 ). In addition, the unit control device 44 is electrically connected to a sensor (not shown) provided in the unit 3. Although not limited, the sensor includes a temperature sensor provided in the heat exchanger 32, a refrigerant pipe on the liquid side connected to the heat exchanger 32, a temperature sensor for measuring the temperature of the air-conditioned space, and the like.

[0084] As described above, the unit control device 44 is connected to the heat source unit control device 42 via the communication line 46. In addition, the unit control device 44 is connected to the remote controller 48 so as to be communicable via the communication line 46. The unit control device 44, the heat source unit control device 42, and the remote controller 48 together function as the control unit 22 for controlling the operation of the air conditioner 1.

[0085] The unit control device 44 is electrically connected to the refrigerant detector 34 via a signal line 95. The unit control device 44 is electrically connected to the alarm device 70, the ventilation device 60, and the shutoff valve 50 as safety devices via a signal line 96.

[0086] The utilization unit control device 44 is configured to receive the detection signal output by the refrigerant detector 34. The utilization unit control device 44 determines the leakage of the refrigerant based on the detection signal output by the refrigerant detector 34. When it is determined that the refrigerant is leaking, the utilization unit control device 44 sends a leakage detection signal to the heat source unit control device 42 and the remote control device 48a.

[0087] Furthermore, when it is determined that the refrigerant is leaking, the unit control device 44 performs leakage control on various devices of the utilization unit 3. The leakage control performed by the unit control device 44 is, for example, a control for prohibiting the start of the second fan 33 of the utilization unit 3 that is stopped. Furthermore, the leakage control performed by the unit control device 44 is, for example, a control for prohibiting the start of the second fan 33 of the utilization unit 3 that is in operation. In addition, as the leakage control, when the second fan 33 that is in operation is stopped, the unit control device 44 may stop the second fan 33 in the same manner as when the air-conditioning operation is stopped normally or in the same manner as when the operation is prohibited. Alternatively, the unit control device 44 may stop the second fan 33 in a manner different from the conventional air-conditioning operation stop and the operation prohibition control.

[0088] In addition, the utilization unit control device 44 has a safety device control unit 45 for controlling the operation of the safety device as a functional unit. When the utilization unit control device 44 determines that the refrigerant is leaking based on the detection signal output by the refrigerant detector 34, the safety device control unit 45 activates the safety device. For example, in the air conditioning system 100, as the safety device, the refrigerant detector 34 as the first device 80 and the alarm device 70 as the second device 90 are used. In this case, when the refrigerant leakage is detected based on the signal output by the refrigerant detector 34, the safety device control unit 45 sends a signal for executing the operation when the refrigerant leakage is detected to the alarm device 70 through the signal line 96.

[0089] Note that, among the functions utilizing the unit control device 44 , the contents related to the interlocking function of the air-conditioning apparatus 1 will be described later.

[0090] (2-1-4-3) Remote control

[0091] The remote controller 48 is a device for operating the air conditioner 1. The installation position of the remote controller 48 is not limited, and it can be installed on a wall of the air-conditioned space, for example. The remote controller 48 is connected to the unit control device 44 via a communication line 46 so as to be able to communicate.

[0092] The remote controller 48 has a remote control device 48a, which includes a microcontroller unit (MCU), various electrical circuits, and electronic circuits. The remote control device 48a, together with the heat source unit control device 42 and the utilization unit control device 44, functions as the control unit 22 for controlling the operation of the air-conditioning device 1. The MCU includes a CPU, a memory, an I / O interface, etc. The memory of the MCU stores various programs for execution by the CPU of the MCU. In addition, the various functions of the remote controller 48 described below can be implemented by hardware, can be implemented by software, or can be implemented by the collaborative work of hardware and software.

[0093] Furthermore, the remote controller 48 includes an operation unit 48b and a display unit 48c.

[0094] The operation unit 48 b is a functional unit for a person to input various instructions to the air conditioning device 1 , and includes various switches and a touch panel.

[0095] The display unit 48c displays the setting contents for the air conditioner 1 and the state of the air conditioner 1. As the state of the air conditioner 1, the display unit 48c displays that the operation of the air conditioner 1 is prohibited by the interlock function. Specifically, when receiving the operation prohibition signal from the utilization unit control device 44, the remote control device 48a displays that the operation of the air conditioner 1 is prohibited by the interlock function. In addition, as the state of the air conditioner 1, the display unit 48c displays that the operation of the air conditioner 1 is prohibited as a result of detecting a refrigerant leak by the refrigerant detector 34. Specifically, when receiving the leakage detection signal from the utilization unit control device 44, the remote control device 48a displays that the operation of the air conditioner 1 is prohibited due to the refrigerant leak.

[0096] (2-1-5) Interlocking function

[0097] Next, refer to Figure 3 , Figure 3A , Figure 4 as well as Figure 4A , the structure of the air conditioning device 1 associated with the interlocking function and its release will be described. Figure 3 It is a schematic electrical circuit diagram for explaining the interlock circuit 98 of the air conditioning device 1 . Figure 3A It is an electrical circuit diagram for explaining the first circuit 99 of the air conditioner 1 . Figure 4 This is a schematic electrical circuit diagram for explaining another example of the interlock circuit 98 of the air conditioning apparatus 1 . Figure 4A This is an electrical circuit diagram for explaining another example of the first circuit 99 of the air-conditioning device 1 .

[0098] First, the interlock function will be described. The interlock function here refers to a function that prohibits the start-up and operation of the air conditioning device 1 when the safety device required for the air conditioning system 100 is not supplied with power and cannot operate.

[0099] The structure for realizing the interlocking function is described. An interlocking circuit 98 is formed by connecting the safety device and the unit control device 44 of the air conditioner 1 through an interlocking wire. The unit control device 44 supplies current to the interlocking circuit 98. In addition, each safety device has a circuit component that constitutes a part of the circuit of the interlocking circuit 98. There is an intermittent part of the circuit in the circuit component of each safety device. In addition, a switch is provided in the circuit component of each safety device, and when power is supplied to the safety device, the switch connects the intermittent part of the circuit of the circuit component. As a result of the above-mentioned configuration, when wiring is performed between the safety device and the unit control device 44 through wires and power is supplied to the safety device, current flows to the interlocking circuit 98. On the other hand, when wiring is not performed between any one of the safety devices and the unit control device 44 through wires, or when power is not supplied to any one of the safety devices, current does not flow to the interlocking circuit 98. More specifically, when no wiring is provided between any safety device and the unit control device 44, or when no power is supplied to any safety device, the interlocking loop 98 is not formed (the loop is not closed) because the circuit includes an intermittent portion.

[0100] The utilization unit control device 44 detects whether current flows in the interlock circuit 98. When current does not flow in the interlock circuit 98, the operation of the utilization unit 3 is prohibited, and an operation prohibition signal is sent to the heat source unit control device 42. In addition, there is no limitation on the detection of whether current flows in the interlock circuit 98, and for example, a relay, an ammeter, or a disconnection detector may be used.

[0101] In addition, for the air conditioning system 100, depending on the amount of refrigerant filled in the air conditioning device 1, the size of the air conditioning target space, the type of refrigerant filled in the air conditioning device 1, etc., sometimes, a safety device is not required. In this case, the interlocking function of the air conditioning device 1 is not required. Therefore, in the air conditioning device 1, it is configured to form a first circuit 99 using a first member 110 described later. The air conditioning device 1 is configured in the following manner: even if there is no safety device, and when the safety device and the utilization unit control device 44 of the air conditioning device 1 are not connected by an electric wire, it is possible to operate when current flows in the first circuit 99.

[0102] The following describes the structures for realizing the interlocking function and its release, namely the connection part 85, the circuit component 97, the mounting part 25, and the first member 110. In addition, although not limited, in this embodiment, the connection part 85, the circuit component 97, and the mounting part 25 are provided in the utilization unit 3.

[0103] In addition, as described above, the air conditioning system 100 of the present embodiment has four types of safety devices. However, here, in order to avoid the complexity of the description, the case where two types of safety devices (the first device 80 and the second device 90) need to be provided in the air conditioning system 100, except for the case where no safety device is required, is described as an example. Here, the case where the first device 80 is the refrigerant detector 34 and the second device 90 is the alarm device 70 is described as an example.

[0104] (2-1-5-1) Connection

[0105] The connection part 85 is a part for connecting the wires connected to the safety device. The connection part 85 includes a first wire connection part 85a and a second wire connection part 85b (see Figure 3 as well as Figure 4 ). A first electric wire 91 having one end connected to the first device 80 is connected to the first electric wire connection portion 85a. In addition, a first portion 97a and a connecting portion 97b of a circuit component 97 described later are connected to the first electric wire connection portion 85a. A second electric wire 92 having one end connected to the second device 90 is connected to the second electric wire connection portion 85b. In addition, a connecting portion 97b and a second portion 97c of a circuit component 97 described later are connected to the second electric wire connection portion 85b. In addition, when there are three or more safety devices, the number of electric wire connection portions may be increased according to the number of safety devices.

[0106] (2-1-5-2) Circuit configuration

[0107] The circuit component 97 is a circuit that connects the connection portion 85 and the utilization unit control device 44. The circuit component 97, the first electric wire 91, and the second electric wire 92 together form an interlock circuit 98. Figure 3 as well as Figure 4 As shown, the circuit component 97 includes a first portion 97a, a connecting portion 97b, and a second portion 97c. The first portion 97a electrically connects the first wire connecting portion 85a to the unit control device 44. The connecting portion 97b electrically connects the first wire connecting portion 85a to the second wire connecting portion 85b. The second portion 97c electrically connects the second wire connecting portion 85b to the unit control device 44.

[0108] When the first wire 91 is connected to the first wire connection portion 85a, the second wire 92 is connected to the second wire connection portion 85b, and the first device 80 and the second device 90 are supplied with power, in the interlock circuit 98, current flows through the first portion 97a, the first wire 91 ( Figure 3 as well as Figure 4 The symbol 91a part), the circuit component part in the first device 80, the first wire 91 (the symbol 91b part), the connecting part 97b, the second wire 92 (the symbol 92a part), the circuit component part in the second device 90, the second wire 92 (the symbol 92b part), and the second part 97c.

[0109] (2-1-5-3) Installation

[0110] The mounting portion 25 is a portion where the first member 110 is mounted. The first member 110 is capable of forming the first loop 99 without passing the first electric wire 91 and the second electric wire 92 .

[0111] As an example, the first member 110 is Figure 3The case of the form of being installed on the mounting portion 25 when the interlocking function is utilized will be described. The mounting portion 25 includes a contact connected to the first portion 97a of the circuit component 97 and a contact connected to the second portion 97c of the circuit component 97. For example, the contact connected to the first portion 97a is forced toward the contact connected to the second portion 97c. When the interlocking function is utilized, a portion of the first member 110 is disposed between the contact connected to the first portion 97a and the contact connected to the second portion 97c. In addition, in order to improve the operability during removal, it is preferred that the first member 110 is a single member formed integrally. The first member 110 here is made of, for example, an insulating material. Therefore, if the first member 110 exists between the contact connected to the first portion 97a and the contact connected to the second portion 97c, then no current will flow between the contact connected to the first portion 97a and the contact connected to the second portion 97c. When the interlock function is released, the first member 110 is pulled out so that the contact connected to the first part 97a and the contact connected to the second part 97c come into contact, thereby forming a first circuit 99 different from the interlock circuit 98. The first circuit 99 is a circuit formed by short-circuiting the first part 97a of the circuit component 97 and the second part 97c of the circuit component 97. When current flows in the first circuit 99, current flows between the first part 97a and the second part 97c of the circuit component 97, similarly to the case where the interlock circuit 98 exists, and therefore the operation of the air conditioner 1 is permitted by the unit control device 44.

[0112] Next, as another example, the first member 110 is Figure 4The specific example of the form that is not installed on the mounting portion 25 when the interlocking function is used is described. The first member 110 here is, for example, a jumper or a short-circuit connector inserted into the mounting portion 25. The mounting portion 25 includes a connection portion connected to the first portion 97a of the circuit component 97 and a connection portion connected to the second portion 97c of the circuit component 97. The connection portion connected to the first portion 97a of the circuit component 97 and the connection portion connected to the second portion 97c of the circuit component 97 are not connected, but are arranged separately. The first member 110 is not installed on the mounting portion 25 when the interlocking function is used. Therefore, no current flows between the connection portion connected to the first portion 97a of the circuit component 97 and the connection portion connected to the second portion 97c of the circuit component 97. When the interlocking function is released, the connection portion connected to the first portion 97a of the circuit component 97 and the connection portion connected to the second portion 97c of the circuit component 97 are connected by the conductive first member 110, forming a first circuit 99 different from the interlocking circuit 98. The first circuit 99 is a circuit formed by short-circuiting the first portion 97a of the circuit component 97 and the second portion 97c of the circuit component 97. When current flows in the first circuit 99, current flows between the first portion 97a and the second portion 97c of the circuit component 97, similarly to the case where the interlock circuit 98 exists, and thus the operation of the air conditioner 1 is permitted by the unit control device 44.

[0113] (2-2) Safety devices

[0114] The air conditioning system 100 has at least two types of safety devices for countermeasures against refrigerant leakage. As safety devices, the air conditioning system 100 of this embodiment has four types of safety devices (alarm device 70, ventilation device 60, shutoff valve 50, refrigerant detector 34). The functions of each safety device will be described later.

[0115] In addition, as described above, when explaining the contents mainly related to the interlocking function of the air conditioning device 1, as safety devices, the air conditioning system 100 has two types of devices, namely, the first device 80 and the second device 90. In the above example, the first device 80 is the refrigerant detector 34, and the second device 90 is the alarm device 70, but it is not limited to this.

[0116] For example, the first device 80 is any one of the alarm device 70, the ventilation device 60, the stop valve 50, and the refrigerant detector 34. The second device 90 is any one of the alarm device 70, the ventilation device 60, the stop valve 50, and the refrigerant detector 34, and is a device of a different type from the first device 80.

[0117] In addition, the air conditioning system 100 includes not limited to two safety devices. In addition to the first device 80 and the second device 90, the air conditioning system 100 may include any of the alarm device 70, the ventilation device 60, the stop valve 50, and the refrigerant detector 34, that is, a device of a different type from the first device 80 and the second device 90 as a third device. In addition, in addition to the first to third devices, the air conditioning system 100 may include any of the alarm device 70, the ventilation device 60, the stop valve 50, and the refrigerant detector 34, that is, a device of a different type from the first to third devices as a fourth device.

[0118] Hereinafter, the alarm device 70 , the ventilation device 60 , the shutoff valve 50 , and the refrigerant detector 34 , which are safety devices, will be described.

[0119] (2-2-1) Refrigerant detector

[0120] The refrigerant detector 34 detects whether there is refrigerant around the refrigerant detector 34. The refrigerant detector 34 is arranged in a casing of the utilization unit 3 (not shown), and the casing accommodates the second expansion mechanism 31, the utilization heat exchanger 32, the second fan 33, etc. In addition, the refrigerant detector 34 may also be arranged outside the casing of the utilization unit 3.

[0121] The refrigerant detector 34 is, for example, a semiconductor sensor. The semiconductor refrigerant detector 34 has a semiconductor detection element (not shown). In the semiconductor detection element, the conductivity changes depending on the state in which there is no refrigerant gas around and the state in which there is refrigerant gas around. As a result of having the above structure, when there is refrigerant gas around the semiconductor detection element, the refrigerant detector 34 outputs a large current.

[0122] The type of the refrigerant detector 34 is not limited to a semiconductor type, and any sensor that can detect the refrigerant gas may be used. For example, the refrigerant detector 34 may be an infrared sensor.

[0123] The signal detected by the refrigerant detector 34 is sent to the utilization unit control device 44 through the signal line 95. The utilization unit control device 44 determines the leakage of the refrigerant based on the current magnitude of the signal output by the refrigerant detector 34.

[0124] (2-2-2) Alarm device

[0125] The alarm device 70 is a safety device that notifies of refrigerant leakage when refrigerant leakage is detected by the refrigerant detector 34. Specifically, the alarm device 70 notifies of refrigerant leakage based on a signal transmitted from the unit control device 44 through the signal line 96.

[0126] The alarm device 70 includes a lamp 74 for notifying of refrigerant leakage and a speaker 76 for notifying of refrigerant leakage.

[0127] The control device 72 of the alarm device 70 controls the operation of the lamp 74 and the speaker 76. When receiving a signal for causing the alarm device 70 to perform a refrigerant leakage notification operation, which is sent from the safety device control unit 45 of the unit control device 44 through the signal line 96, the control device 72 turns on the lamp 74 and outputs an alarm sound from the speaker 76.

[0128] (2-2-3) Ventilation device

[0129] The ventilation device 60 mainly includes a ventilation fan 64. The control device 62 of the ventilation device 60 controls the operation of the ventilation fan 64.

[0130] The ventilation fan 64 is a fan for exhausting air from a space where the refrigerant may leak. For example, the ventilation fan 64 is a fan for exhausting air from a space where the utilization unit 3 having the refrigerant detector 34 disposed therein is installed.

[0131] The ventilator 60 operates when refrigerant leakage is detected by the refrigerant detector 34. Specifically, the control device 62 starts the operation of the ventilator fan 64 in response to a signal for activating the ventilator fan 64 transmitted through the communication line 96 by the safety device control unit 45 of the unit control device 44.

[0132] (2-2-4) Stop valve

[0133] The shut-off valve 50 includes a first shut-off valve 54 provided on the liquid refrigerant connecting pipe 4 and a second shut-off valve 56 provided on the gas refrigerant connecting pipe 5. The first shut-off valve 54 and the second shut-off valve 56 are not limited, and may be, for example, solenoid valves or electric valves. The control device 52 controls the operation of the first shut-off valve 54 and the second shut-off valve 56. Generally speaking, the first shut-off valve 54 and the second shut-off valve 56 are in an open state. The shut-off valve 50 closes the first shut-off valve 54 and the second shut-off valve 56 when a refrigerant leak is detected by the refrigerant detector 34. Specifically, the control device 52 closes the first shut-off valve 54 and the second shut-off valve 56 according to a signal for closing the first shut-off valve 54 and the second shut-off valve 56 sent by the safety device control unit 45 of the unit control device 44 through the signal line 96.

[0134] (3) Features

[0135] (3-1)

[0136] The air conditioner 1 of the present embodiment is an air conditioner including a refrigerant circuit 6, and includes a connection portion 85, a circuit configuration portion 97, a first member 110, and a control portion 22. The connection portion 85 is connected to a first electric wire 91 and a second electric wire 92, wherein the first electric wire 91 is connected to a first device 80 among a plurality of safety devices, and the second electric wire 92 is connected to a second device 90 of a type different from the first device 80 among a plurality of safety devices, wherein the plurality of safety devices include at least two of a refrigerant detector, an alarm device, a stop valve, and a ventilation device. The circuit configuration portion 97 forms an interlock circuit 98 together with the first electric wire 91 and the second electric wire 92 connected to the connection portion 85. The first member 110 can form a first circuit 99 including at least a portion of the circuit configuration portion 97 without passing through the first electric wire 91 and the second electric wire 92. When no current flows in either the interlock circuit 98 or the first circuit 99, the control portion 22 prohibits the operation of the air conditioner 1.

[0137] In the air conditioner 1 of this embodiment, since the first circuit 99 capable of releasing the interlock of the air conditioner 1 can be formed by the first member 110, when the safety device is not used, it is not necessary to release the interlock for each of the plurality of safety devices, thus improving the operability.

[0138] (3-2)

[0139] The first circuit 99 of the air conditioner 1 of the present embodiment is a circuit formed by short-circuiting the first portion 97 a of the circuit configuration section 97 and the second portion 97 c of the circuit configuration section 97 .

[0140] In the air conditioning apparatus 1 of the present embodiment, by short-circuiting the circuit configuration portion 97 using the first member 110 , interlocks with a plurality of safety devices can be easily released simultaneously.

[0141] (3-3)

[0142] The air conditioning device 1 of the present embodiment includes a mounting portion 25 to which the first member 110 can be mounted and detached. By removing the first member 110 from the mounting portion 25, the first circuit 99 is formed.

[0143] In the air conditioning device 1 of the present embodiment, if the first component 110 is removed, the first loop 99 can be formed, and the interlock with multiple safety devices can be quickly released. In addition, since the first component 110 is usually installed in the mounting portion 25 when the air conditioning device 1 is installed, the possibility of losing the first component 110 can be reduced.

[0144] Alternatively, in the air conditioning device 1, the first circuit 99 may be formed by attaching the first member 110 to the attachment portion 25. In such an air conditioning device 1, by attaching the first member 110, the first circuit 99 can be formed, and interlocks with a plurality of safety devices can be quickly released.

[0145] (4) Modification

[0146] Next, a modification of the air conditioner 1 of the present embodiment will be described. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0147] (4-1) Modification A

[0148] In the above-described embodiment, the display unit 48c of the remote controller 48 notifies that the operation of the usage unit 3 or the heat source unit 2 is prohibited. However, the present invention is not limited to this.

[0149] The air conditioning system 100 may notify a mobile terminal or the like owned by a manager of the air conditioning system 100 or the like through a communication line such as the Internet that the operation of at least one of the usage unit 3 and the heat source unit 2 is prohibited.

[0150] Furthermore, the air conditioning system 100 may include, as a notification unit, an LED lamp that is disposed on the outer casing of the utilization unit 3 and that notifies that the operation of the heat source unit 2 is prohibited.

[0151] (4-2) Modification B

[0152] As a means for notifying refrigerant leakage, the alarm device 70 may include only one of the lamp 74 and the speaker 76. In addition, the alarm device 70 may include a refrigerant leakage notification means other than the lamp 74 and the speaker 76, such as a vibration device.

[0153] Furthermore, the lamp 74 and the speaker 76 of the alarm device 70 for notifying of refrigerant leakage may be provided in the remote controller 48 or the utilization unit 3 .

[0154] (4-3) Modification C

[0155] In the above embodiment, the interlock circuit 98 is a circuit formed by connecting the unit control device 44, the first device 80, and the second device 90 in series through the first wire 91 and the second wire 92. However, this is not limited to this. Figure 6 As shown, the interlock circuit 98 may also include a first interlock circuit 98a and a second interlock circuit 98b that are independent of each other.

[0156] In the first interlocking circuit 98a, the unit control device 44 is connected to the first wire connection portion 85a through the circuit component 97, and the first wire connection portion 85a is connected to the first device 80 through the first wire 91. In the second interlocking circuit 98b, the unit control device 44 is connected to the second wire connection portion 85b through the circuit component 97, and the second wire connection portion 85b is connected to the second device 90 through the second wire 92.

[0157] exist Figure 6 In the example of the unit control device 44, when the interlock function is used, when current does not flow in at least one of the first interlock circuit 98a and the second interlock circuit 98b, the operation of the air conditioning device 1 is prohibited. In other words, when current flows in both the first interlock circuit 98a and the second interlock circuit 98b, the unit control device 44 allows the operation of the air conditioning device 1.

[0158] In this way, when the interlock circuit 98 has the first interlock circuit 98a and the second interlock circuit 98b which are independent of each other, the first component 110 may be a component that short-circuits the connection portion of the first wire 91 relative to the first wire connection portion 85a and the connection portion of the second wire 92 relative to the second wire connection portion 85b. The first circuit 99 thus formed includes two circuits (the first circuit A99a and the first circuit B99b). When the first component 110 is mounted on the connection portion 85 as the mounting portion and the current flows in both the first circuit A99a and the first circuit B99b, the operation of the air conditioner 1 is allowed by the unit control device 44.

[0159] <Note>

[0160] As mentioned above, although the embodiment of this disclosure is described, it should be understood that various changes in form and details can be made without departing from the spirit and scope of this disclosure described in the claims.

[0161] Explanation of symbols

[0162] 1 Air conditioning unit

[0163] 6 Refrigerant circuit

[0164] 22. Control Unit

[0165] 25 Installation

[0166] 80 First Device

[0167] 85 connection

[0168] 90 Second Device

[0169] 91 First Wire

[0170] 92 Second Wire

[0171] 97 Circuit Configuration Department

[0172] 97aPart 1

[0173] 97c Part 2

[0174] 98 interlocking circuit

[0175] 98a First interlocking circuit (interlocking circuit)

[0176] 98b Second interlocking circuit (interlocking circuit)

[0177] 99 First Circuit

[0178] 99a First Circuit A (First Circuit)

[0179] 99b First Circuit B (First Circuit)

[0180] 110 First Component

[0181] Prior art literature

[0182] Patent Literature

[0183] Patent document 1: Japanese Patent Application Publication No. 2019-52785.

Claims

1. An air conditioning device (1), comprising a refrigerant circuit (6), characterized in that: include: A first device (80) of a plurality of safety devices, the plurality of safety devices comprising at least two of a refrigerant detector, an alarm device, a shutoff valve, and a ventilation device; a second device (90) of a type different from the first device among the plurality of safety devices; A connecting portion (85) having a first electric wire connecting portion (85a) and a second electric wire connecting portion (85b); a first electric wire (91) connected to the first device (80) and the first electric wire connecting portion (85a); a second electric wire (92) connected to the second device (90) and the second electric wire connecting portion (85b); Control (22, 44); A circuit component (97), the circuit component (97) comprising: a first portion (97a) electrically connecting the first wire connection portion (85a) and the control portion (22, 44); a second portion (97c) electrically connecting the second wire connection portion (85b) and the control portion (22, 44); and a connecting portion (97b) electrically connecting the first wire connection portion (85a) and the second wire connection portion (85b); An interlocking circuit (98, 98a, 98b), wherein the circuit forming portion (97), the first electric wire (91) connected to the connecting portion (85), and the second electric wire (92) together form the interlocking circuit (98, 98a, 98b); and a first member (110) capable of forming a first circuit (99, 99a, 99b) including at least a part of the circuit forming part (97) without passing through the first electric wire (91) and the second electric wire (92); The first circuit (99, 99a, 99b) is a circuit formed by short-circuiting the first portion (97a) of the circuit component (97) and the second portion (97c) of the circuit component (97), When no current flows in either the interlock circuit or the first circuit, the control unit (22, 44) prohibits the operation of the air conditioning device.

2. The air conditioning device according to claim 1, characterized in that: The air conditioning device comprises a mounting portion (25) capable of being assembled or disassembled from the first component. The first loop is formed by removing the first member from the mounting portion.

3. The air conditioning device according to claim 1, characterized in that: The air conditioning device comprises a mounting portion (25) capable of being assembled or disassembled from the first component. The first loop is formed by mounting the first member to the mounting portion.

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