EP2746685A2 - Klimaanlage - Google Patents

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Publication number
EP2746685A2
EP2746685A2 EP13190456.7A EP13190456A EP2746685A2 EP 2746685 A2 EP2746685 A2 EP 2746685A2 EP 13190456 A EP13190456 A EP 13190456A EP 2746685 A2 EP2746685 A2 EP 2746685A2
Authority
EP
European Patent Office
Prior art keywords
unit
power
indoor
outdoor
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13190456.7A
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English (en)
French (fr)
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EP2746685A3 (de
EP2746685B1 (de
Inventor
Yoshihito Ono
Yoshihiro Ono
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP2746685A2 publication Critical patent/EP2746685A2/de
Publication of EP2746685A3 publication Critical patent/EP2746685A3/de
Application granted granted Critical
Publication of EP2746685B1 publication Critical patent/EP2746685B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/32—Details or features not otherwise provided for preventing human errors during the installation, use or maintenance, e.g. goofy proof

Definitions

  • the present invention relates to an air conditioner.
  • an air conditioner that supplies power supplied to an indoor unit to an outdoor unit via a power line and is provided with a reference frequency extraction circuit and an indoor-unit control unit in the indoor unit, wherein a commercial power supply is connected to an indoor-unit rectifier circuit and the indoor-unit control unit, a power relay and the reference frequency extraction circuit are connected to the power line that supplies power to the outdoor unit, and, in a standby state, the reference frequency extraction circuit enters a de-energized state by having the power relay opened (for example, see Japanese Patent Application Laid-open 2007-225128 ).
  • Conventional air conditioners representative of which is the air conditioner disclosed in Japanese Patent Application Laid-open 2007-225128 , use a system (hereinafter, referred to as an "indoor-unit power receiving system") in which the commercial power supply supplied to an indoor unit is supplied to an outdoor unit via a power line.
  • an indoor-unit power receiving system in which the commercial power supply supplied to an indoor unit is supplied to an outdoor unit via a power line.
  • a power relay is connected to the power line and the feeding of power to the outdoor unit is stopped by having the power relay opened when the air conditioner is on operational standby, thereby realizing a reduction in standby power.
  • the air conditioner can use both the indoor-unit power receiving system and the outdoor-unit power receiving system; however, there is a problem in that even when the air conditioner is used under the indoor-unit power receiving system, the feeding of power to the outdoor unit cannot be stopped when the air conditioner is on operational standby and thus the standby power cannot be reduced.
  • the present invention is achieved in view of the above and has an object to provide an air conditioner that can use both the indoor-unit power receiving system and the outdoor-unit power receiving system and can realize a reduction in standby power by stopping the feeding of power to the outdoor unit in the indoor-unit power receiving system.
  • an air conditioner that includes an indoor unit and an outdoor unit, and includes a relay on the indoor unit side, the relay being capable of interrupting supply of a commercial power supply from the indoor unit to the outdoor unit, wherein the indoor unit includes a pair of commercial-power-supply input terminals, to which the commercial power supply is connected when operating under an indoor-unit power receiving system, in which the commercial power supply supplied to the indoor unit is supplied to the outdoor unit, and to which the commercial power supply is supplied via the outdoor unit when operating under an outdoor-unit power receiving system, in which the commercial power supply supplied to the outdoor unit is supplied to the indoor unit, and a pair of commercial-power-supply output terminals that supplies the commercial power supply connected to the pair of commercial-power-supply input terminals to the outdoor unit via the relay when operating under the indoor-unit power receiving system.
  • FIG. 1 is a diagram illustrating an example of wiring of an indoor-unit power receiving system in one example configuration of an air conditioner according to the first embodiment.
  • FIG. 2 is a diagram illustrating an example of wiring of an outdoor-unit power receiving system in one example configuration of the air conditioner according to the first embodiment.
  • the air conditioner according to the first embodiment includes an indoor unit 1 and an outdoor unit 2.
  • the indoor unit 1 includes an indoor-unit-side control board 3 and an indoor-unit-side terminal block 5.
  • the indoor-unit-side control board 3 includes an indoor-unit-side power-supply control circuit 7, an indoor-unit-side communication circuit 9, and a power relay (hereinafter, simply referred to as a "relay") 11.
  • the relay 11 has a function of stopping the supply of a commercial power supply 12 to the outdoor unit 2 when the air conditioner is on operational standby.
  • the indoor-unit-side terminal block 5 includes an S1 terminal (first terminal) 21 that is connected to the ungrounded-side power-supply input terminal of the indoor-unit-side power-supply control circuit 7 via the relay 11; an S2 terminal (second terminal) 22 that is connected to the grounded-side power-supply input terminal of the indoor-unit-side power-supply control circuit 7; an S3 terminal (third terminal) 23 that is connected to the grounded-side power-supply input terminal of the indoor-unit-side power-supply control circuit 7 via the indoor-unit-side communication circuit 9; an L terminal (fourth terminal) 24 that is connected to the ungrounded-side power-supply input terminal of the indoor-unit-side power-supply control circuit 7; and an N terminal (fifth terminal) 25 that is connected to the S2 terminal 22.
  • the L terminal (fourth terminal) 24 and the N terminal (fifth terminal) 25 are connected to the commercial power supply 12.
  • the L terminal (fourth terminal) 24 and the N terminal (fifth terminal) 25 form a pair of commercial-power-supply input terminals to which the commercial power supply 12 is input via the outdoor unit 2.
  • the S1 terminal (first terminal) 21 and the S2 terminal (second terminal) 22 form a pair of commercial-power-supply output terminals that supplies the commercial power supply 12 input to the L terminal (fourth terminal) 24 and the N terminal (fifth terminal) 25 to the outdoor unit 2 via the relay 11.
  • the outdoor unit 2 includes an outdoor-unit-side control board 4 and an outdoor-unit-side terminal block 6.
  • the outdoor-unit-side control board 4 includes an outdoor-unit-side power-supply control circuit 8 and an outdoor-unit-side communication circuit 10.
  • the outdoor-unit-side terminal block 6 includes an L1 terminal (sixth terminal) 26 that is connected to the ungrounded-side power-supply input terminal of the outdoor-unit-side power-supply control circuit 8; an N1 terminal (seventh terminal) 27 that is connected to the grounded-side power-supply input terminal of the outdoor-unit-side power-supply control circuit 8; an S3' terminal (eighth terminal) 28 that is connected to the grounded-side power-supply input terminal of the outdoor-unit-side power-supply control circuit 8 via the outdoor-unit-side communication circuit 10; an L2 terminal (ninth terminal) 29 that is connected to the L1 terminal 26; and an N2 terminal (tenth terminal) 30 that is connected to the N1 terminal 27.
  • the commercial power supply 12 is input to the L1 terminal (sixth terminal) 26 and the N1 terminal (seventh terminal) 27 via the indoor unit 1.
  • the L1 terminal (sixth terminal) 26 and the N1 terminal (seventh terminal) 27 form a pair of commercial-power-supply input terminals to which the commercial power supply 12 is connected.
  • the L2 terminal (ninth terminal) 29 and the N2 terminal (tenth terminal) 30 form a pair of commercial-power-supply output terminals that supplies the commercial power supply 12 input to the L1 terminal (sixth terminal) 26 and the N1 terminal (seventh terminal) 27 to the indoor unit 1.
  • FIG. 1 illustrates an example of wiring of the indoor-unit power receiving system as described above.
  • the commercial power supply 12 is connected between the L terminal 24 and the N terminal 25 on the indoor unit 1 side; the S1 terminal 21 on the indoor unit 1 side and the L1 terminal 26 on the outdoor unit 2 side are connected by a power line 13; the S2 terminal 22 on the indoor unit 1 side and the N1 terminal 27 on the outdoor unit 2 side are connected by a power-supply and communication common line 14; and the S3 terminal 23 on the indoor unit 1 side and the S3' terminal 28 on the outdoor unit 2 side are connected by a communication line 15.
  • the power supplied between the L terminal 24 and the N terminal 25 of the indoor-unit-side terminal block 5 from the commercial power supply 12 is supplied to the indoor-unit-side power-supply control circuit 7 and the power is also supplied to the outdoor-unit-side power-supply control circuit 8 via the power line 13 and the power-supply and communication common line 14 by the indoor-unit-side power-supply control circuit 7 closing the relay 11.
  • the outdoor-unit-side power-supply control circuit 8 generates power for communication between the indoor unit 1 and the outdoor unit 2 and the power for communication generated by the outdoor-unit-side power-supply control circuit 8 is supplied to the loop (hereinafter, referred to as a "communication loop") formed by the indoor-unit-side communication circuit 9, the outdoor-unit-side communication circuit 10, the power-supply and communication common line 14, and the communication line 15 via the outdoor-unit-side communication circuit 10, whereby communication is established between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10. Therefore, the operation of the air conditioner under the indoor-unit power receiving system is enabled.
  • FIG. 2 illustrates an example of wiring of the outdoor-unit power receiving system as described above.
  • the commercial power supply 12 is connected between the L1 terminal 26 and the N1 terminal 27 on the outdoor unit 2 side; the L terminal 24 on the indoor unit 1 side and the L2 terminal 29 on the outdoor unit 2 side are connected by the power line 13; the N terminal 25 on the indoor unit 1 side and the N2 terminal 30 on the outdoor unit 2 side are connected by the power-supply and communication common line 14; and the S3 terminal 23 on the indoor unit 1 side and the S3' terminal 28 on the outdoor unit 2 side are connected by the communication line 15.
  • the power supplied between the L1 terminal 26 and the N1 terminal 27 of the outdoor-unit-side terminal block 6 from the commercial power supply 12 is supplied to the outdoor-unit-side power-supply control circuit 8 and the power is also supplied to the indoor-unit-side power-supply control circuit 7 via the power line 13 and the power-supply and communication common line 14.
  • the outdoor-unit-side power-supply control circuit 8 In a similar manner to the case of the indoor-unit power receiving system, the outdoor-unit-side power-supply control circuit 8 generates power for communication between the indoor unit 1 and the outdoor unit 2 and the power for communication generated by the outdoor-unit-side power-supply control circuit 8 is supplied to the communication loop formed by the indoor-unit-side communication circuit 9, the outdoor-unit-side communication circuit 10, the power-supply and communication common line 14, and the communication line 15 via the outdoor-unit-side communication circuit 10, whereby communication is established between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10. Therefore, the operation of the air conditioner under the indoor-unit power receiving system is enabled.
  • FIG. 3 is a front view of a cable receptacle of the indoor-unit-side terminal block of the air conditioner according to the first embodiment.
  • the S1 terminal 21, the S2 terminal 22, the S3 terminal 23, the N terminal 25, and the L terminal 24 are sequentially arranged from the left in the order that they appear in this sentence when viewed from the front side of the cable receptacle of the indoor-unit-side terminal block 5.
  • the terminals 21 to 25 are arranged in such an order, it is satisfactory that the commercial power supply 12 is connected to the two terminals on the right side when viewed from the front side of the cable receptacle of the indoor-unit-side terminal block 5, and the power line 13, the power-supply and communication common line 14, and the communication line 15 are connected to the three terminals on the left side when viewed from the front side of the cable receptacle of the indoor-unit-side terminal block 5.
  • the terminals 21 to 23 and the terminals 24 and 25 may be arranged spaced apart from each other or may be color-coded on the indoor-unit-side terminal block 5 to clearly distinguish between the terminals 21 to 23 and the terminals 24 and 25.
  • the terminals 21 to 23 and the terminals 24 and 25 are arranged such that they are explicitly distinguished, the occurrence of faulty wiring can be prevented.
  • FIG. 4 is a diagram illustrating one example of a control process flow when the indoor unit starts to receive power in the indoor-unit power receiving system of the air conditioner according to the first embodiment.
  • communication between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 in the indoor-unit power receiving system of the air conditioner according to the first embodiment is established by supplying power for communication generated by the outdoor-unit-side power-supply control circuit 8 to the communication loop formed by the indoor-unit-side communication circuit 9, the outdoor-unit-side communication circuit 10, the power-supply and communication common line 14, and the communication line 15.
  • the indoor-unit-side power-supply control circuit 7 closes the relay 11 to start feeding power to the outdoor unit 2 after a predetermined time (for example, three minutes) has elapsed from when the feeding of power to the indoor unit 1 is started (Step ST102).
  • the indoor-unit-side power-supply control circuit 7 enters a communication standby state (Step ST103) and the outdoor-unit-side communication circuit 10 starts communication with the indoor-unit-side communication circuit 9.
  • the indoor-unit-side power-supply control circuit 7 determines whether communication between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 is established before a predetermined time (for example, three seconds) has elapsed after the feeding of power to the outdoor unit 2 is started (Step ST104).
  • Step ST104 If communication between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 is established before the predetermined time (three seconds in this example) has elapsed after the feeding of power to the outdoor unit 2 is started (Yes in Step ST104), the outdoor-unit-side power-supply control circuit 8 starts an operation of the outdoor unit 2 (Step ST105) and the control process flow ends.
  • Step ST104 If communication between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 is not established before the predetermined time (three seconds in this example) has elapsed after the feeding of power to the outdoor unit 2 is started (No in Step ST104), the indoor-unit-side power-supply control circuit 7 determines that a communication error has occurred (Step ST106) and opens the relay 11 to stop feeding power to the outdoor unit 2 (Step ST107), and the control process flow ends.
  • FIG. 5 is a diagram illustrating a first example of faulty wiring between the indoor unit and the outdoor unit in the indoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 6 is a diagram illustrating a second example of faulty wiring between the indoor unit and the outdoor unit in the indoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 7 is a diagram illustrating a third example of faulty wiring between the indoor unit and the outdoor unit in the indoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 8 is a diagram illustrating a fourth example of faulty wiring between the indoor unit and the outdoor unit in the indoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 5 is a diagram illustrating a first example of faulty wiring between the indoor unit and the outdoor unit in the indoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 6 is a diagram illustrating a second example of faulty wiring between the indoor unit and the outdoor unit in the indoor-
  • FIG. 9 is a diagram illustrating a fifth example of faulty wiring between the indoor unit and the outdoor unit in the indoor-unit power receiving system of the air conditioner according to the first embodiment. As illustrated in FIG. 5 to FIG. 9 , there are five faulty wiring patterns between the indoor-unit-side terminal block 5 and the outdoor-unit-side terminal block 6 in the indoor-unit power receiving system of the air conditioner according to the present embodiment.
  • Step ST107 in FIG. 4 the relay 11 is opened by the indoor-unit-side power-supply control circuit 7 and the feeding of power to the outdoor unit 2 is stopped.
  • Step ST107 in FIG. 4 the relay 11 is opened by the indoor-unit-side power-supply control circuit 7 and the feeding of power to the outdoor unit 2 is stopped.
  • FIG. 10 is a diagram illustrating one example of a control process flow when the outdoor unit starts to receive power in the outdoor-unit power receiving system of the air conditioner according to the first embodiment.
  • communication between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 in the outdoor-unit power receiving system of the air conditioner according to the first embodiment is established by supplying power for communication generated by the outdoor-unit-side power-supply control circuit 8 to the communication loop formed by the indoor-unit-side communication circuit 9, the outdoor-unit-side communication circuit 10, the power-supply and communication common line 14, and the communication line 15.
  • the indoor-unit-side power-supply control circuit 7 enters a communication standby state (Step ST203) and determines whether communication between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 is established before a predetermined time (for example, three seconds) has elapsed after the feeding of power to the indoor unit 1 is started (Step ST204).
  • a predetermined time for example, three seconds
  • Step ST204 If communication between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 is established before the predetermined time (three seconds in this example) has elapsed after the feeding of power to the indoor unit 1 is started (Yes in Step ST204), the outdoor-unit-side power-supply control circuit 8 starts an operation of the outdoor unit 2 in response to the operation start request from the indoor-unit-side power-supply control circuit 7 (Step ST205) and the control process flow ends.
  • the predetermined time three seconds in this example
  • Step ST204 If communication between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 is not established before the predetermined time (three seconds in this example) has elapsed after the feeding of power to the indoor unit 1 is started (No in Step ST204), the outdoor-unit-side power-supply control circuit 8 determines that a communication error has occurred (Step ST206) and performs a process of refusing the operation start request from the indoor-unit-side power-supply control circuit 7 (Step ST207), and the control process flow ends.
  • FIG. 11 is a diagram illustrating a first example of faulty wiring between the indoor unit and the outdoor unit in the outdoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 12 is a diagram illustrating a second example of faulty wiring between the indoor unit and the outdoor unit in the outdoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 13 is a diagram illustrating a third example of faulty wiring between the indoor unit and the outdoor unit in the outdoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 14 is a diagram illustrating a fourth example of faulty wiring between the indoor unit and the outdoor unit in the outdoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 15 is a diagram illustrating a fifth example of faulty wiring between the indoor unit and the outdoor unit in the outdoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 16 is a diagram illustrating a sixth example of faulty wiring between the indoor unit and the outdoor unit in the outdoor-unit power receiving system of the air conditioner according to the first embodiment.
  • FIG. 11 to FIG. 16 illustrate six typical patterns among a plurality of kinds of faulty wiring patterns between the indoor-unit-side terminal block 5 and the outdoor-unit-side terminal block 6 that can be dealt with on the device side in the outdoor-unit power receiving system of the air conditioner according to the present embodiment.
  • Step ST202 the communication loop between the indoor-unit-side communication circuit 9 and the outdoor-unit-side communication circuit 10 is not formed, communication is not established even if communication with respect to the indoor-unit-side communication circuit 9 is started from the outdoor-unit-side communication circuit 10 (Step ST202 in FIG. 10 ) (No in Step ST204 in FIG. 10 ). Consequently, a communication error occurs (Step ST206 in FIG. 10 ) and a process of refusing the operation start request from the indoor-unit-side power-supply control circuit 7 is performed (Step ST207). As described above, in the examples of faulty wiring illustrated in FIG. 11 and FIG.
  • a voltage lower than the commercial power supply 12 is input to the indoor-unit-side power-supply control circuit 7; therefore, the voltage is not sufficient for controlling the indoor unit 1 and thus the indoor unit 1 does not operate.
  • the connection technician even if a connection technician starts feeding power to the outdoor unit 2 when the air conditioner is installed, the operation of the indoor unit 1 is not started and thus an air-conditioning operation cannot be performed. Therefore, it is possible to cause the connection technician to recognize faulty wiring.
  • the indoor unit includes the L terminal (fourth terminal) and the N terminal (fifth terminal), to which the commercial power supply is connected when operating under the indoor-unit power receiving system and which form a pair of commercial-power-supply input terminals, to which the commercial power supply is input via the outdoor unit, when operating under the outdoor-unit power receiving system, and the S1 terminal (first terminal) and the S2 terminal (second terminal), which form a pair of commercial-power-supply output terminals, which supplies the commercial power supply input to the L terminal (fourth terminal) and the N terminal (fifth terminal) to the outdoor unit via the relay, when operating under the indoor-unit power receiving system, the outdoor unit includes the L1 terminal (sixth terminal) and the N1 terminal (seventh terminal), to which the commercial power supply is input via the indoor unit when operating under the indoor-unit power receiving system and which form a pair of commercial-power-supply input terminals, to which the commercial power supply is input, when operating under the outdoor-unit power
  • the indoor-unit-side communication circuit and the outdoor-unit-side communication circuit are included that, when the connection between the outdoor unit and the indoor unit is normal, form a communication loop between the indoor unit and the outdoor unit, and the communication loop is formed by the indoor-unit-side communication circuit, the outdoor-unit-side communication circuit, the power-supply and communication common line, and the communication line, whereby communication is established between the indoor-unit-side communication circuit and the outdoor-unit-side communication circuit, thereby performing an operation under the indoor-unit power receiving system or the outdoor-unit power receiving system.
  • the feeding of the commercial power supply to the outdoor unit is stopped by having the relay opened.
  • the communication loop is not formed within a predetermined time after the feeding of the commercial power supply to the indoor unit is started and communication is not established between the indoor-unit-side communication circuit and the outdoor-unit-side communication circuit, a process of refusing the operation start request from the indoor-unit-side power-supply control circuit is performed.
  • an air-conditioning operation cannot be performed. Therefore, it is possible to cause a connection technician to recognize faulty wiring.
  • the S1 terminal (first terminal), the S2 terminal (second terminal), the S3 terminal (third terminal), the N terminal (fifth terminal), and the L terminal (fourth terminal) are sequentially arranged from the left in the order that they appear in this sentence when viewed from the front side of the cable receptacle of the indoor-unit-side terminal block. Therefore, it is satisfactory that the commercial power supply is connected to the two terminals on the right side when viewed from the front side of the cable receptacle of the indoor-unit-side terminal block, and the power line, the power-supply and communication common line, and the communication line are connected to the three terminals on the left side when viewed from the front side of the cable receptacle of the indoor-unit-side terminal block.
  • the terminal group including the S1 terminal (first terminal), the S2 terminal (second terminal), and the S3 terminal (third terminal), and the terminal group including the N terminal (fifth terminal) and the L terminal (fourth terminal) are arranged spaced apart from each other or are color-coded on the indoor-unit-side terminal block to explicitly distinguish between the terminal group including the S1 terminal (first terminal), the S2 terminal (second terminal), and the S3 terminal (third terminal), and the terminal group including the N terminal (fifth terminal) and the L terminal (fourth terminal), the occurrence of faulty wiring can be prevented.
  • FIG. 17 is a diagram illustrating one example configuration on an indoor unit side of an air conditioner according to the second embodiment
  • FIG. 18 is a diagram illustrating one example of an indoor-unit-side terminal block of the air conditioner according to the second embodiment.
  • the components that are the same as or similar to those of the first embodiment are denoted by the same reference numerals and a detailed explanation thereof is omitted.
  • a thermal fuse 16 is connected in series between the S2 terminal (second terminal) 22 and the grounded-side power-supply input terminal of the indoor-unit-side power-supply control circuit 7 and, as illustrated in FIG. 18 , the thermal fuse 16 is arranged such that it is blown due to the heat generated in the indoor-unit-side terminal block 5.
  • the thermal fuse 16 arranged on the indoor-unit-side terminal block 5 is blown due to the heat generated in the indoor-unit-side terminal block 5. Consequently, the power supply loop is cut regardless of which one of the indoor-unit power receiving system and the outdoor-unit power receiving system is used to operate the air conditioner. Therefore, when the indoor-unit-side terminal block 5 generates abnormal heat, the feeding of power from the commercial power supply 12 to the indoor unit 1 can be stopped.
  • the thermal fuse which is connected in series between the S2 terminal (second terminal) and the grounded-side power-supply input terminal of the indoor-unit-side power-supply control circuit, is arranged on the indoor-unit-side terminal block; therefore, when the indoor-unit-side terminal block generates abnormal heat due to a poor connection of the power line or the like, the thermal fuse is blown. Therefore, the feeding of the commercial power supply to the indoor unit can be stopped regardless of which one of the indoor-unit power receiving system and the outdoor-unit power receiving system is used to operate the air conditioner.
  • an effect is obtained where both the indoor-unit power receiving system and the outdoor-unit power receiving system are used and, in the indoor-unit power receiving system, a reduction in standby power can be realized by stopping the feeding of power to the outdoor unit.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
EP13190456.7A 2012-12-20 2013-10-28 Klimaanlage Active EP2746685B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012278258A JP5769692B2 (ja) 2012-12-20 2012-12-20 空気調和機

Publications (3)

Publication Number Publication Date
EP2746685A2 true EP2746685A2 (de) 2014-06-25
EP2746685A3 EP2746685A3 (de) 2017-12-27
EP2746685B1 EP2746685B1 (de) 2020-10-28

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EP (1) EP2746685B1 (de)
JP (1) JP5769692B2 (de)
CN (1) CN203571958U (de)
ES (1) ES2832505T3 (de)

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EP3783272A4 (de) * 2018-04-18 2021-04-07 Mitsubishi Electric Corporation Steuerungssubstrat und innenraumeinheit einer klimaanlage

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CN104896687B (zh) * 2015-05-13 2017-07-28 广东美的制冷设备有限公司 空调器、室外机及其供电通信控制系统
JP6765174B2 (ja) * 2015-09-18 2020-10-07 シャープ株式会社 空気調和機および空気調和機の制御方法
CN106225105B (zh) * 2016-09-20 2022-03-01 广东美的制冷设备有限公司 电流环通信装置及空调器
CN106440220B (zh) * 2016-10-12 2019-07-02 青岛海尔空调器有限总公司 空调待机电路和空调器
KR102457030B1 (ko) 2018-06-14 2022-10-21 엘지전자 주식회사 멀티형 공기조화기
CN118137640A (zh) * 2022-11-28 2024-06-04 广东美的制冷设备有限公司 空调系统及其供电控制装置和供电控制方法

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JP2007225128A (ja) 2006-02-21 2007-09-06 Fujitsu General Ltd 空気調和機

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EP2746685B1 (de) 2020-10-28
JP2014122731A (ja) 2014-07-03

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