JP5501059B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner including at least one outdoor unit and at least one indoor unit.

  There is known an air conditioner in which at least one outdoor unit and at least one indoor unit are connected via a communication line, and data communication is performed between the devices (for example, Patent Document 1).

  When installing this air conditioner in a building, after the installation work of the outdoor unit and indoor unit is completed, a communication address is assigned to each device, and communication lines are incorrectly connected or not connected based on the assigned address. Do the work to check.

  As a method of assigning communication addresses to the respective devices, a method of operating communication units mounted on the respective devices and automatically setting the addresses of the respective devices by data communication of these communication units is used.

JP 2005-226868 A

  When an air conditioner is installed in a newly built building, there is often no AC wiring (also called power wiring) from a commercial AC power source in the building at the time of installation. In this case, although the installation of the air conditioner is completed, the communication unit of each device cannot be operated. If the communication unit does not operate, the communication address cannot be automatically set, and the communication line connection cannot be checked.

  In addition, the AC wiring is often laid near the completion of the building, and the worker is on standby until then. After that, even if AC wiring has been laid and automatic address setting and communication line connection check are possible, it is already on the verge of completion, so if an incorrect connection of the communication line is found, it will be short. The work must be redone in time, which is a heavy burden on the workers.

  The present invention takes the above circumstances into consideration, and its purpose is to allow the outdoor unit and the indoor unit communication unit to be operated immediately after installation even in a situation where AC wiring has not been laid in the building. An object of the present invention is to provide an air conditioner that can automatically set communication addresses for outdoor units and indoor units immediately after installation, and can reduce the burden on workers.

  An air conditioner according to a first aspect of the present invention includes a compressor and an outdoor fan connected to an outdoor AC wiring, an outdoor power supply connected to the outdoor AC wiring and converting an AC voltage of the outdoor AC wiring into a DC voltage. Circuit, outdoor DC wiring connected to the output terminal of the outdoor power supply circuit, and the DC voltage of the outdoor DC wiring connected to the outdoor DC wiring to operate by the DC voltage of the outdoor DC wiring and to perform data communication with the outside, An outdoor unit having an outdoor communication unit capable of setting an address for use, an indoor fan connected to an indoor AC wiring, an indoor power supply connected to the indoor AC wiring and converting an AC voltage of the indoor AC wiring into a DC voltage Circuit, the indoor DC wiring connected to the output terminal of the indoor power circuit, and the DC voltage of the indoor DC wiring connected to the indoor DC wiring, At least one indoor unit having an indoor communication unit capable of setting its own communication address, and connected to the outdoor DC wiring and the indoor DC wiring, the outdoor communication unit and the indoor And a DC power supply wiring capable of connecting a DC power supply for operating the communication unit.

  According to the air conditioner of the present invention, an outdoor unit and a communication unit of an indoor unit are operated immediately after installation by connecting a DC power source to the DC wiring for feeding even in a situation where AC wiring has not been laid in the building. be able to. As a result, communication addresses for the outdoor unit and the indoor unit can be set immediately after installation, and the burden on the operator can be reduced.

The figure which shows the whole structure of one Embodiment of this invention. The block diagram which shows the control circuit of the outdoor unit in the embodiment. The block diagram which shows the control circuit of the indoor unit in the embodiment. The block diagram which shows the modification of the control circuit of the outdoor unit in the embodiment. The block diagram which shows another modification of the control circuit of the outdoor unit in the embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a plurality of outdoor units 1a, 1b, and 1c are installed on the roof of a building, for example, and a plurality of outdoor units 1d and 1e are installed at different locations on the roof of the building. Each of these outdoor units is equipped with an outdoor communication unit 2. Among these outdoor communication units 2, the outdoor communication units 2 of the outdoor units 1a, 1b, and 1c are interconnected by the sub-bus line SBL, and the outdoor communication units 2 of the outdoor units 1d and 1e are interconnected by the sub-bus line SBL. . The outdoor communication units 2 of the outdoor units 1a and 1d, which are center units, are interconnected by the main bus line MBL.

  A plurality of indoor units 3a, 3b, 3c, 3d, and 3e are installed in each room of the same building. Each of these indoor units is equipped with an indoor communication unit 4. Among these indoor communication units 4, the indoor communication units 4 of the indoor units 3a, 3b, 3c are connected to the outdoor unit 1a by the main bus line MBL, and the indoor communication units 4 of the indoor units 3d, 3e are connected by the main bus line MBL. Connected to the outdoor unit 1c.

  A central remote controller 5 is connected to the main bus line MBL. That is, the outdoor units 1a, 1b, 1c, 1d, and 1e, the indoor units 3a, 3b, 3c, 3d, and 3e, and the centralized remote controller 5 are connected to the communication network by the main bus line MBL and the sub bus line SBL.

  Then, after the outdoor units 1a, 1b, 1c, 1d, and 1e and the indoor units 3a, 3b, 3c, 3d, and 3e are installed, the feeding DC wiring DCL1 is connected to each of the outdoor communication unit 2 and the indoor communication unit 4. Is done. The power supply DC wiring DCL 1 is for supplying a DC voltage for operation to each outdoor communication unit 2 and each indoor communication unit 4. As this supply source, it is possible to connect a direct current power source, preferably a battery power source 30, carried by the worker of the installation work. An operator carries a personal computer 40 in addition to the battery power source 30 and can connect the personal computer 40 to the main bus line MBL of the communication network.

  In the building where each outdoor unit and each indoor unit are installed, an outdoor AC wiring ACL1 connected to the three-phase commercial AC power supply 10 is installed and connected to the single-phase commercial AC power supply 20 separately from the installation work. Indoor-side AC wiring ACL2 is laid. The voltage of the three-phase commercial AC power supply 10 and the single-phase commercial AC power supply 20 is generally 200V AC. The outdoor units 1a, 1b, 1c, 1d, and 1e are connected to the outdoor AC wiring ACL1, and the indoor units 3a, 3b, 3c, 3d, and 3e are connected to the indoor AC wiring ACL2. The outdoor AC wiring ACL1 supplies a three-phase AC voltage for operation to each outdoor unit. The indoor AC wiring ACL2 supplies a single-phase AC voltage for operation to each indoor unit.

  The control circuit of the outdoor unit 1a is shown in FIG. Although only the outdoor unit 1a is shown, the control circuits of the other outdoor units 1b, 1c, 1d, and 1e have the same configuration.

  The compressor 51, the outdoor fan 52, and the outdoor power supply circuit 53 are connected to the outdoor AC wiring ACL1. The outdoor power supply circuit 53 converts the three-phase AC voltage of the outdoor AC wiring ACL1 into a DC voltage of 3.3 V, for example, for control operation and outputs it. An outdoor DC wiring DCL2 is connected to the output terminal of the outdoor power supply circuit 53, and an outdoor control unit 54 and a relay 55 are connected to the outdoor DC wiring DCL2. Furthermore, the outdoor communication unit 2 is connected to the outdoor DC wiring DCL2 via the normally open contact 55a of the relay 55. The outdoor control unit 54 and the outdoor communication unit 2 are connected via a photocoupler 56 for data communication.

  The outdoor control unit 54 operates by the direct current voltage of the outdoor direct current wiring DCL2, and performs data communication with the outdoor communication unit 2 via the photocoupler 56.

  The outdoor communication unit 2 connects a CPU 63 as a main control unit to a main bus line MBL of a communication network via a physical layer (PHY) 61 and a media access controller (MAC) 62, and the CPU 63 is used for data storage and program storage. Is connected to the memory 64, and is operated by the DC voltage of the outdoor DC wiring DCL2, and performs data communication with the communication units of other outdoor units and each indoor unit via the main bus line MBL. Data communication with the outdoor control unit 54 is performed via the coupler 56.

  Since this outdoor communication unit 2 includes a physical layer (PHY) 61 and a media access controller (MAC) 62, it can communicate with other communication units independently, and the outdoor control unit 54 is in a non-operating state. A self-communication address can be set.

  For the data transmission from the outdoor communication unit 2 to the outdoor control unit 54, the photocoupler 56 is a light emitting diode via a resistor R1 from the connection position of the normally open contact 55a in the outdoor DC wiring DCL2 to the outdoor communication unit 2 side. 56a is connected, and the collector-emitter of the phototransistor 56b is connected via the resistor R2 from the connection position of the normally open contact 55a in the outdoor DC line DCL2 to the position on the outdoor control unit 54 side. Further, the photocoupler 56 is used for data transmission from the outdoor control unit 54 to the outdoor communication unit 2 via a resistor R3 from the connection position of the normally open contact 55a in the outdoor DC wiring DCL2 to the outdoor control unit 54 side. A light emitting diode 56c is connected, and the collector and emitter of the phototransistor 56d are connected via a resistor R4 from the connection position of the normally open contact 55a in the outdoor DC wiring DCL2 to the position on the outdoor communication unit 2 side.

  In the outdoor unit 1a, the feeding DC wiring DCL1 is connected to a position closer to the outdoor communication unit 2 than the connection position of the normally open contact 55a in the outdoor DC wiring DCL2.

  The normally open contact 55a existing between the connection position of the outdoor control unit 54 and the connection position of the outdoor communication unit 2 in the outdoor DC wiring DCL2 is transmitted from the outdoor power supply circuit 53 to the outdoor communication when there is an output from the outdoor power supply circuit 53. The unit 2 is allowed to be energized, and functions as an outdoor energization control unit that interrupts energization from the power supply DC wiring DCL1 to the outdoor control unit 54 and the outdoor power supply circuit 53 when there is no output from the outdoor power supply circuit 53.

  FIG. 3 shows a control circuit for the indoor unit 3a. Although only the indoor unit 3a is shown, the control circuits of the other indoor units 3b, 3c, 3d, and 3e have the same configuration.

  The indoor fan 71 and the indoor power supply circuit 73 are connected to the indoor AC wiring ACL2. The indoor power supply circuit 73 converts the single-phase AC voltage of the indoor AC wiring ACL2 into a DC voltage of 3.3 V, for example, for control operation and outputs it. The indoor side DC wiring DCL3 is connected to the output terminal of the indoor power supply circuit 73, and the indoor control unit 74 and the relay 75 are connected to the indoor side DC wiring DCL3. Furthermore, the indoor communication unit 4 is connected to the indoor side DC wiring DCL3 via the normally open contact 75a of the relay 75. The indoor control unit 74 and the indoor communication unit 4 are connected via a data communication photocoupler 76.

  The indoor control unit 74 is operated by the DC voltage of the indoor DC wiring DCL3 and performs data communication with the communication unit of the indoor communication unit 4 via the photocoupler 76.

  The indoor communication unit 4 connects a CPU 83 as a main control unit to a main bus line MBL of a communication network via a physical layer (PHY) 81 and a media access controller (MAC) 82, and the CPU 83 is used for data storage and program storage. Is connected to the memory 84, and is operated by the DC voltage of the indoor DC wiring DCL3 to perform data communication with other indoor units and each outdoor unit via the main bus line MBL. Data communication with the indoor control unit 74 is performed.

  Like the outdoor communication unit 2, the indoor communication unit 4 includes a physical layer (PHY) 81 and a media access controller (MAC) 82. Therefore, the indoor communication unit 4 can communicate with other communication units independently, and the indoor control unit 74. Even if is not operating, its own communication address can be set. For data transmission from the indoor communication unit 4 to the indoor control unit 74, the photocoupler 76 is a light emitting diode via a resistor R1 from the connection position of the normally open contact 75a in the indoor DC wiring DCL3 to the indoor communication unit 4 side. 76a is connected, and the collector and the emitter of the phototransistor 76b are connected via a resistor R2 from the connection position of the normally open contact 75a in the indoor-side DC wiring DCL3 to the position on the indoor control unit 74 side. Further, the photocoupler 76 is used for data transmission from the indoor control unit 74 to the indoor communication unit 4, and the light emitting diode 76 c is connected to the indoor control unit 74 side of the normally open contact 75 a in the indoor DC wiring line DCL 3 via the resistor R 3. And the collector and emitter of the phototransistor 76d are connected to a position closer to the indoor communication unit 4 than the normally open contact 75a in the indoor DC wiring DCL3 via a resistor R4.

  In the indoor unit 3a, the feeding DC wiring DCL1 is connected to a position closer to the indoor communication unit 4 than a connection position of the normally open contact 75a in the indoor DC wiring DCL3.

  The normally open contact 75a existing between the connection position of the indoor control unit 74 and the connection position of the indoor communication unit 4 in the indoor DC wiring line DCL3 is transmitted from the indoor power supply circuit 73 to the indoor communication when there is an output of the indoor power supply circuit 73. The unit 4 is energized, and functions as an indoor energization control unit that interrupts energization from the power supply DC wiring DCL1 to the indoor control unit 74 and the indoor power supply circuit 73 when there is no output from the indoor power supply circuit 73.

  According to such a configuration, the building where the air conditioner is installed is a new building, and the outdoor AC wiring ACL1 and the indoor AC wiring ACL2 are still laid in the building when the air conditioner is installed. Even when there is no battery, each outdoor communication unit 2 and each indoor communication unit 4 can be operated by the DC voltage of the battery power supply 30 by connecting the battery power supply 30 carried by the worker to the power supply DC wiring DCL1.

  In this state, the personal computer 40 carried by the worker is connected to the main bus line MBL of the communication network, and the address setting mode is designated by the personal computer 40, whereby each outdoor communication unit 2 and each indoor communication unit 4 are In actual operation, an address setting operation by mutual data communication is started. That is, for example, the outdoor communication unit 2 of the outdoor unit 1a, which is a center unit, obtains, for example, a MAC address of another communication unit by data communication, so that the communication address for each outdoor unit and the communication unit of each indoor unit is obtained. Assign. As a result, communication addresses for each outdoor unit and each indoor unit are assigned. When the automatic setting of the communication address is completed, this is displayed on the display of the personal computer 40.

  After the automatic setting of the communication address is completed, when the worker designates the connection check mode with the personal computer 40, the communication line (main bus line MBL and sub bus line SBL) is erroneously set based on the assigned communication address. The operation of checking connection or non-connection is executed by the personal computer 40 and the outdoor communication unit 2 of the outdoor unit 1a. For example, if there is a device that cannot communicate with any of the outdoor units and the indoor units, the display of the personal computer 40 indicates that the device is not connected. The worker who sees this display can immediately enter the repair work.

  Therefore, even when the outdoor AC wiring ACL1 and the indoor AC wiring ACL2 are not yet laid, the outdoor communication unit 2 of each outdoor unit and the indoor communication unit 4 of each indoor unit are operated immediately after installation to each outdoor unit. In addition, the communication address for each indoor unit can be automatically set. Along with the completion of the automatic setting of the communication address, a communication line connection check can be performed immediately after installation. For the worker, it is not necessary to wait until the outdoor AC wiring ACL1 and the indoor AC wiring ACL2 are laid, so that the work efficiency is greatly improved.

  Further, when the outdoor AC wiring ACL1 is not laid, in each outdoor unit, since the output of the outdoor power supply circuit 53 is zero, the relay 55 is not energized, and the normally open contact 55a is in an open state. Even if 30 is connected to the DC power supply wiring DCL1, the DC voltage of the battery power supply 30 is not supplied to the outdoor power supply circuit 53, the outdoor control unit 54, and the relay 55 side. When the indoor AC wiring ACL2 is not laid, in each indoor unit, the output of the indoor power supply circuit 73 is zero, so the relay 75 is not energized, and the normally open contact 75a is in an open state. Even if 30 is connected to the DC power supply wiring DCL1, the DC voltage of the battery power supply 30 is not supplied to the indoor power supply circuit 73, the indoor control unit 74, and the relay 75 side.

  Therefore, unnecessary power consumption of the battery power supply 30 can be prevented, and the power of the battery power supply 30 is used only for the operation of each indoor communication unit 2 and each outdoor communication unit 4, and each indoor communication unit 2 and each outdoor communication The automatic setting of the communication address by the operation of the communication unit 4 can be surely performed to the end. In addition, the communication between the indoor unit and the outdoor unit of a conventional air conditioner shares the control function and the communication function of each part of the air conditioner with the outdoor control unit and the indoor control unit that control the device parts inside. Generally, in this embodiment, the control function and communication function of each component are separated, and the communication function can be set by operating only the newly provided communication unit. Yes. Since the communication unit that performs only communication can have lower power consumption than the control unit that controls the device, the power consumption of the battery power source 30 can be further reduced.

  When the installation of the outdoor AC wiring ACL1 is completed, in each outdoor unit, a DC voltage is output from the outdoor power supply circuit 53, the relay 55 is energized, and the normally open contact 55a is closed. Accordingly, each outdoor communication unit 2 can be operated by the output voltage of the outdoor power supply circuit 53. When the indoor AC wiring ACL2 is laid, each indoor unit outputs a DC voltage from the indoor power supply circuit 73, energizes the relay 75, and closes the normally open contact 75a. Therefore, each indoor communication unit 4 can be operated by the output voltage of the outdoor power supply circuit 73.

  As a result, since the setting of the communication address between each indoor unit and each outdoor unit has already been completed before the outdoor AC wiring ACL1 and the indoor AC wiring ACL2 are laid, the outdoor AC wiring ACL1 and the indoor AC wiring When the ACL 2 is laid and AC power is supplied to both wirings, communication for operating the air conditioner can be started immediately between the previous indoor units and the outdoor units. Communication during operation of the air conditioner is performed by exchanging data that needs to be transmitted or received between the outdoor control unit 54 and the outdoor communication unit 2, and the outdoor communication unit 2 communicates with other communication units according to the result. Communicate. In response to a data request from another communication unit, after the outdoor communication unit 2 receives the request, the outdoor control unit 54 requests the data, and the outdoor communication unit 2 receives the response data from the outdoor control unit 54. Reply to the communication unit. Similarly, in each indoor unit, the indoor communication unit 4 exchanges data between the indoor control units 74, and the indoor communication unit 4 transmits data to other communication units as necessary.

  In the above embodiment, the normally open contact 55a of the relay 55 is used as the outdoor energization control means in the outdoor DC wiring DCL2. However, as shown in FIG. May be provided.

  The diode 57 exists between the connection position of the outdoor control unit 54 and the connection position of the outdoor communication unit 2 in the outdoor DC wiring DCL2, and when there is an output of the outdoor power supply circuit 53, the outdoor power supply circuit 53 transmits the outdoor communication. Energization of the unit 2 is allowed, and when there is no output from the outdoor power supply circuit 53, the power supply from the DC power supply DCL1 to the outdoor control unit 54 and the outdoor power supply circuit 53 is cut off.

  Although only the outdoor unit 1a is shown, the same configuration can be applied to other outdoor units. In each indoor unit, a diode can be used instead of the normally open contact 75a of the relay 75.

  In the above embodiment, the main bus line MBL and the sub-bus line SBL are used as the communication lines of each outdoor communication unit 2 and each indoor communication unit 4, but each outdoor unit and each indoor unit is used as shown in FIG. The outdoor communication unit 2 and the indoor communication unit 4 may be connected to the power supply DC wiring DCL1 connected to the power supply via the high-pass filter 58, and the power supply DC wiring DCL1 may also be used as a data communication line. Although only the outdoor unit 1a is shown, other outdoor units and each indoor unit can have the same configuration.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in each embodiment. You may combine the component covering each embodiment suitably.

  1a, 1b, 1c, 1d, 1e ... outdoor unit, 2 ... outdoor communication unit, 3a, 3b, 3c, 3d, 3e ... indoor unit, 4 ... indoor communication unit, 5 ... centralized remote control, 10 ... three-phase commercial AC Power source, 20 ... single-phase commercial AC power supply, ACL1 ... outdoor AC wiring, ACL2 ... indoor AC wiring, DCL1 ... feeding DC wiring, DCL2 ... outdoor DC wiring, DCL3 ... indoor DC wiring, MBL ... main bus line , SBL ... sub bus line, 30 ... battery power supply, 40 ... personal computer, 53 ... outdoor power supply circuit, 54 ... outdoor control unit, 55 ... relay, 55a ... normally open contact (outdoor energization control means), 56 ... photocoupler, 73 ... Indoor power supply circuit, 74 ... Indoor control unit, 75 ... Relay, 75a ... Normally open contact (indoor energization control means), 76 ... Photocoupler

Claims (8)

Compressor and outdoor fan connected to outdoor AC wiring, outdoor power supply circuit connected to outdoor AC wiring for converting AC voltage of outdoor AC wiring to DC voltage, connected to output terminal of this outdoor power supply circuit Outdoor DC wiring connected to the outdoor DC wiring and the outdoor DC wiring connected to the outdoor DC wiring and operated by the DC voltage of the outdoor DC wiring to perform data communication with the outside and set an address for own communication. Machine,
Indoor fan connected to indoor AC wiring, indoor power supply circuit connected to indoor AC wiring for converting AC voltage of indoor AC wiring to DC voltage, indoor side connected to output terminal of this indoor power supply circuit At least one indoor communication unit that is connected to the DC wiring and the indoor DC wiring, operates with the DC voltage of the indoor DC wiring, performs data communication with the outside, and can set its own communication address. Indoor unit,
DC power supply wiring connected to the outdoor DC wiring and the indoor DC wiring, and capable of connecting a DC power source for operating the outdoor communication unit and the indoor communication unit;
An air conditioner comprising: Compressor and outdoor fan connected to outdoor AC wiring, outdoor power supply circuit connected to outdoor AC wiring for converting AC voltage of outdoor AC wiring to DC voltage, connected to output terminal of this outdoor power supply circuit The outdoor DC wiring, the outdoor control unit connected to the outdoor DC wiring and operated by the DC voltage of the outdoor DC wiring, and the external DC wiring connected to the outdoor DC wiring and operated by the DC voltage of the outdoor DC wiring. An outdoor unit having an outdoor communication unit capable of setting its own communication address while performing data communication with
Indoor fan connected to indoor AC wiring, indoor power supply circuit connected to indoor AC wiring for converting AC voltage of indoor AC wiring to DC voltage, indoor side connected to output terminal of this indoor power supply circuit DC wiring, an indoor control unit connected to the indoor DC wiring and operating with the DC voltage of the indoor DC wiring, and an external data connected to the indoor DC wiring and operated with the DC voltage of the indoor DC wiring At least one indoor unit having an indoor communication unit capable of setting its own communication address while performing communication;
DC power supply wiring connected to the outdoor DC wiring and the indoor DC wiring, and capable of connecting a DC power source for operating the outdoor communication unit and the indoor communication unit;
Energization from the outdoor power supply circuit to the outdoor communication unit is provided between the connection position of the outdoor control unit and the connection position of the outdoor communication unit in the outdoor DC wiring. Outdoor energization control means for cutting off the energization from the DC power supply wiring to the outdoor control unit when there is no output of the outdoor power supply circuit,
An air conditioner comprising: Energized from the indoor power supply circuit to the indoor communication unit when there is an output of the indoor power supply circuit provided between the connection position of the indoor control unit and the connection position of the indoor communication unit in the indoor DC wiring And an indoor energization control means for interrupting energization from the power supply DC wiring to the indoor control unit when there is no output of the indoor power supply circuit,
The air conditioner according to claim 1, further comprising: Compressor and outdoor fan connected to outdoor AC wiring, outdoor power supply circuit connected to outdoor AC wiring for converting AC voltage of outdoor AC wiring to DC voltage, connected to output terminal of this outdoor power supply circuit The outdoor DC wiring, the outdoor control unit connected to the outdoor DC wiring and operated by the DC voltage of the outdoor DC wiring, and the external DC wiring connected to the outdoor DC wiring and operated by the DC voltage of the outdoor DC wiring. An outdoor unit having an outdoor communication unit capable of setting its own communication address while performing data communication with
Indoor fan connected to indoor AC wiring, indoor power supply circuit connected to indoor AC wiring for converting AC voltage of indoor AC wiring to DC voltage, indoor side connected to output terminal of this indoor power supply circuit DC wiring, an indoor control unit connected to the indoor DC wiring and operating with the DC voltage of the indoor DC wiring, and an external data connected to the indoor DC wiring and operated with the DC voltage of the indoor DC wiring At least one indoor unit having an indoor communication unit capable of setting its own communication address while performing communication;
DC power supply wiring connected to the outdoor DC wiring and the indoor DC wiring, and capable of connecting a DC power source for operating the outdoor communication unit and the indoor communication unit;
Energized from the indoor power supply circuit to the indoor communication unit when there is an output of the indoor power supply circuit provided between the connection position of the indoor control unit and the connection position of the indoor communication unit in the indoor DC wiring And an indoor energization control means for interrupting energization from the power supply DC wiring to the indoor control unit when there is no output of the indoor power supply circuit,
An air conditioner comprising:   The air conditioner according to claim 2 or 3, wherein the outdoor energization control means is a normally open contact of a relay energized by an output voltage of the outdoor power supply circuit.   The air conditioner according to claim 2 or 3, wherein the outdoor energization control means is a diode.   The air conditioner according to claim 3 or 4, wherein the indoor energization control means is a normally open contact of a relay energized by an output voltage of the indoor power supply circuit.   The air conditioner according to claim 3 or 4, wherein the indoor energization control means is a diode.

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