WO2018142738A1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
WO2018142738A1
WO2018142738A1 PCT/JP2017/042719 JP2017042719W WO2018142738A1 WO 2018142738 A1 WO2018142738 A1 WO 2018142738A1 JP 2017042719 W JP2017042719 W JP 2017042719W WO 2018142738 A1 WO2018142738 A1 WO 2018142738A1
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WO
WIPO (PCT)
Prior art keywords
inverter
compressor
fan
power
air conditioner
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PCT/JP2017/042719
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French (fr)
Japanese (ja)
Inventor
将志 大田
直哉 花野
孝 大石
Original Assignee
日立ジョンソンコントロールズ空調株式会社
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Publication of WO2018142738A1 publication Critical patent/WO2018142738A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans

Definitions

  • the present invention relates to an air conditioner.
  • the outdoor unit of the air conditioner is equipped with an inverter control circuit that supplies AC power supplied from an AC power source to the compressor motor and controls the motor.
  • Patent Document 1 discloses an inverter control circuit in which a power transistor module, a noise filter circuit, a diode stack, and a capacitor are mounted on a single substrate, thereby reducing the number of connected wires and reducing material costs and assembly costs. Is disclosed.
  • Patent Document 2 the electric parts constituting the inverter are arranged in a multi-layer structure, and the downsizing of the inverter, the number of wirings, etc. are reduced, thereby downsizing the outdoor unit that stores the inverter.
  • An outdoor unit of an air conditioner that achieves cost reduction is disclosed.
  • Patent Document 3 a control element for an air conditioner that incorporates a storage element storing unique data relating to characteristics and functions unique to each model into a control circuit, and reduces costs by using a common substrate. Is disclosed.
  • a compressor inverter that drives and controls a compressor motor and a fan inverter that drives and controls a fan motor are usually mounted on separate boards, and each board is electrically connected by a harness or the like. Connected to.
  • the fan inverter has a smaller rated current than the compressor inverter, and thus is easily affected by noise superimposed on the harness. For this reason, when the compressor inverter and the fan inverter are mounted on different boards, there is a problem in that a problem occurs in driving the fan motor and the performance of the air conditioner is degraded.
  • an object of the present invention is to prevent the performance of the air conditioner from being lowered or to improve the performance.
  • the present invention provides a converter that converts AC power supplied from an AC power source into DC power, a smoothing unit that smoothes the DC power, and the smoothed DC power into AC power.
  • a compressor inverter that converts and supplies the compressor motor to the compressor motor, converts the smoothed DC power into AC power, and supplies the fan motor with a fan inverter having a smaller rated current than the compressor inverter;
  • the converter, the smoothing unit, the compressor inverter, and the fan inverter are mounted on the same substrate.
  • the present invention it is possible to prevent the performance of the air conditioner from being lowered or to improve the performance.
  • the air conditioner 1 includes an indoor unit 100 and an outdoor unit 200.
  • the indoor unit 100 includes an indoor heat exchanger 11, an indoor expansion valve 12, and the like.
  • the outdoor unit 200 includes a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, an accumulator 24, an outdoor expansion valve 25, and the like.
  • an indoor fan 13 for promoting heat exchange is provided, and the fan motor 13a drives the indoor fan 13.
  • An outdoor fan 26 for promoting heat exchange is provided in the vicinity of the outdoor heat exchanger 23, and the fan motor 26 a drives the outdoor fan 26. Further, the compressor motor 21a drives the compressor 21.
  • a plurality of outdoor fans may be provided in the vicinity of the outdoor heat exchanger 23.
  • the air conditioner 1 is a device that performs air conditioning (cooling operation, heating operation, etc.) by circulating a refrigerant in a heat pump cycle.
  • a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, an outdoor expansion valve 25, an indoor expansion valve 12, an indoor heat exchanger 11, and an accumulator 24 are sequentially connected in an annular manner.
  • the refrigerant circuit Q thus formed the refrigerant is circulated by a known heat pump cycle.
  • the solid line arrow X indicates the refrigerant circulation direction when the air conditioner 1 performs the cooling operation
  • the broken line arrow Y indicates the refrigerant circulation direction when the air conditioner 1 performs the heating operation.
  • the air conditioner 1 when the air conditioner 1 performs a cooling operation, the high-temperature and high-pressure refrigerant compressed by the compressor 21 passes through the four-way valve 22 and flows into the outdoor heat exchanger 23, and by heat exchange with air, After being condensed and liquefied, the pressure is reduced by the indoor expansion valve 12 and flows into the indoor heat exchanger 11.
  • the refrigerant that has flowed into the indoor heat exchanger 11 evaporates due to heat absorption from the air, and then returns to the compressor 21 via the accumulator 24.
  • the refrigerant returned to the compressor 21 is compressed again to a high temperature and a high pressure, and circulates through the four-way valve 22, the outdoor heat exchanger 23, the outdoor expansion valve 25, the indoor expansion valve 12, the indoor heat exchanger 11, and the accumulator 24.
  • a heat pump cycle is configured by repeating this circulation.
  • the control board 2 includes a converter 201, a smoothing unit 202, a compressor inverter 203, a fan inverter 204, a control unit 205, a voltage detection circuit 206, a current detection circuit 207, a power supply circuit 208, and a driver.
  • a circuit 209, a current sensor 210, a discharge pressure sensor 211, and a discharge pressure detection circuit 212 are provided.
  • the current sensor 210, the discharge pressure sensor 211, and the discharge pressure detection circuit 212 are mounted on the same substrate.
  • the reference voltage VF in the DC unit I 0 is common to the compressor inverter 203 and the fan inverter 204.
  • a thick line indicates a power line, and a thin line indicates a signal line.
  • FIG. 2 the case where two fan inverters 204 are mounted on the control board 2 will be described as an example.
  • the number of fan inverters 204 mounted on the control board 2 is particularly limited. is not. It is possible to increase the number of fan inverters 204 mounted on the control board 2 by additionally connecting the fan inverters 204 to the DC unit I 0 shown in FIG.
  • the converter 201 includes a plurality of rectifying elements 251 and is a circuit in which the elements are bridge-connected.
  • the converter 201 converts the AC power supplied from the three-phase AC power source 220 into DC power via the noise filter 230 and supplies the converted DC power to the smoothing unit 202.
  • the smoothing unit 202 smoothes the DC voltage converted by the converter 201 and supplies the smoothed DC power to the compressor inverter 203 and the two fan inverters 204.
  • the smoothing unit 202 includes a smoothing capacitor 221, a power factor improving reactor 222, an electromagnetic contactor 223, and an inrush current limiting resistor 224.
  • the smoothing capacitor 221, the power factor improving reactor 222, the magnetic contactor 223, and the inrush current limiting resistor 224 are provided between the converter 201 and the compressor inverter 203 or the two fan inverters 204.
  • the power factor improving reactor 222 has one terminal connected to the smoothing capacitor 221 and the other terminal connected to the electromagnetic contactor 223 and the inrush current limiting resistor 224.
  • the electromagnetic contactor 223 and the inrush current limiting resistor 224 are provided in parallel so that the electromagnetic contactor 223 that is closed when the power is turned on does not weld due to an excessive inrush current flowing through the smoothing capacitor 221.
  • the compressor inverter 203 is connected to the converter 201 and the compressor motor 21a.
  • the compressor inverter 203 converts the DC power smoothed by the smoothing unit 202 into U-phase, V-phase, and W-phase three-phase AC power, and supplies it to the compressor motor 21a.
  • the compressor inverter 203 controls the drive of the compressor motor 21a by changing the rotation speed (operation frequency) of the compressor motor 21a based on the drive signal input from the driver circuit 209.
  • the compressor inverter 203 includes a plurality of switching elements 231 and a plurality of flywheel elements 232, and the switching elements 231 are three-phase bridge-connected circuits.
  • a flywheel element 232 is provided along with each switching element 231.
  • the flywheel element 232 regenerates counter electromotive force generated by the switching operation of the switching element 231.
  • the compressor inverter 203 controls the switching operation of each switching element 231 based on the drive signal input from the driver circuit 209, so that AC power is generated in the compressor inverter 203.
  • the rated current of the compressor inverter 203 is 20 [A] or more.
  • the rated current is the minimum value of the direct current that can be driven by the compressor inverter.
  • the fan inverter 204 is connected to the converter 201 and the fan motor 26a.
  • the fan inverter 204 converts the DC power smoothed by the smoothing unit 202 into U-phase, V-phase, and W-phase three-phase AC power and supplies it to the fan motor 26a. Further, the fan inverter 204 controls the drive of the fan motor 26a by changing the rotational speed (operation frequency) of the fan motor 26a based on the drive signal input from the control unit 205.
  • the fan inverter 204 includes a plurality of switching elements 241 and a plurality of flywheel elements 242, and the plurality of switching elements 241 are three-phase bridge-connected circuits.
  • a flywheel element 242 is provided along with each switching element 241.
  • the flywheel element 242 regenerates back electromotive force generated by the switching operation of the switching element 241. Further, the fan inverter 204 controls the switching operation of each switching element 241 based on the drive signal input from the control unit 205, whereby AC power is generated in the fan inverter 204.
  • the rated current of the fan inverter 204 is 1 ⁇ 4 or less of the rated current of the compressor inverter 203.
  • the rated current is the minimum value of the direct current that can be driven by the fan inverter.
  • the fan inverter has a smaller rated current than the compressor inverter.
  • the fan inverter electrically connects each board compared to the compressor inverter. It becomes easy to receive the influence of the noise superimposed on the harness required for the.
  • the compressor inverter, the fan inverter, the control unit, and the like are all mounted on the same control board 2, a harness for electrically connecting the boards is unnecessary, and the influence of noise Can be minimized.
  • the control unit 205 outputs a control signal to the driver circuit 209, and controls the compressor inverter 203 via the driver circuit 209.
  • the control unit 205 outputs a drive signal to the two fan inverters 204 to control the two fan inverters 204.
  • control unit 205 controls the opening degree of the indoor expansion valve 12 or the outdoor expansion valve 25, the rotational speeds of the indoor fan 13 and the outdoor fan 26, the four-way valve 22 for switching the cooling / heating operation mode, and the like.
  • the control unit 205 has a sensorless type vector control function. Therefore, the control unit 205 can estimate the rotation speed and phase (magnetic pole position) of the compressor motor 21a and the fan motor 26a.
  • the control unit 205 based on the current detected by the current detection circuit 207 (the current flowing through the DC portion I 0), it is possible to reproduce the driving current of the compressor motor 21a and a fan motor 26a. Thereby, since it is not necessary to mount a speed sensor, a magnetic pole position sensor, a current sensor for detecting an alternating current, and the like on the control board 2, the control board 2 can have a simple configuration.
  • the voltage detection circuit 206 detects the DC voltage output from the converter 201, confirms whether or not the detected DC voltage is an insufficient voltage, and outputs the detection result to the control unit 205.
  • the current detection circuit 207 detects the current flowing through the DC unit I 0 using the current sensor 210 and outputs the detection result to the control unit 205.
  • the power supply circuit 208 adjusts the DC voltage (high voltage) converted by the converter 201 and further smoothed by the smoothing unit 202 to, for example, a control voltage (low voltage) of about 5 [V] or 15 [V].
  • a control voltage low voltage
  • the driver circuit 209 is provided between the control unit 205 and the compressor inverter 203.
  • the driver circuit 209 amplifies a weak signal (for example, a PWM signal) input from the control unit 205 to a level at which the switching element 231 included in the compressor inverter 203 can be driven, and the drive signal is amplified by the compressor inverter 203.
  • a weak signal for example, a PWM signal
  • the switching element 231 provided in the compressor inverter 203 performs a switching operation, and the compressor inverter 203 is driven.
  • the switching element 231 provided in the compressor inverter 203 stops the switching operation, and the compressor inverter 203 stops.
  • the current sensor 210 is connected to the converter 201 and detects a current flowing through the DC unit I 0, that is, a DC current input to the compressor inverter 203 and the two fan inverters 204. Output to the detection circuit 207.
  • the control board 2 may be provided with a protection function against overcurrent and a protection function against a decrease in control voltage. When each protection function is activated, each circuit can output an abnormal signal to the control unit 205 to stop the compressor inverter 203 and the two fan inverters 204.
  • the discharge pressure sensor 211 is connected to the discharge pressure detection circuit 212, detects the discharge pressure of the compressor 21, and outputs the detected pressure to the discharge pressure detection circuit 212.
  • the discharge pressure sensor 211 performs a switching operation based on whether or not the discharge pressure is greater than or equal to a predetermined threshold value.
  • the discharge pressure detection circuit 212 detects the discharge pressure using the discharge pressure sensor 211 and outputs the detection result to the control unit 205.
  • the control board 2 is mounted with an inverter for compressor, two inverters for fan, a smoothing unit, a control unit, and the like. That is, the harness for electrically connecting the respective boards, which is required when the compressor inverter, the two fan inverters, the smoothing unit, the control unit, and the like are mounted on different substrates, is not necessary.
  • the fan inverter having a smaller rated current than the compressor inverter can be driven normally without being affected by noise superimposed on the harness. Therefore, it is possible to avoid the problems that have occurred in the conventional air conditioner, such as the fan inverter being stopped, heat exchange in the outdoor unit not being performed smoothly, and improving the performance of the air conditioner 1. it can.
  • the control board 2 with low cost and high reliability can be provided by controlling the inverter for compressor and the inverter for two fans by the same control unit, the performance of the air conditioner 1 is reduced. In addition to preventing, it can improve performance.

Abstract

The present invention is provided with: a converter which converts alternating-current power supplied from an alternating-current power supply into direct-current power; a smoothing unit which smooths the direct-current power; a compressor inverter which converts the smoothed direct-current power into alternating-current power and supplies the alternating-current power to a compressor motor; and a fan inverter which converts the smoothed direct-current power into alternating-current power and supplies the alternating-current power to a fan motor and which has a rated current lower than that of the compressor inverter. The present invention is characterized in that the converter, the smoothing unit, the compressor inverter, and the fan inverter are all mounted on a single substrate.

Description

空気調和機Air conditioner
　本発明は、空気調和機に関する。 The present invention relates to an air conditioner.
　空気調和機の室外機には、交流電源から供給される交流電力を、圧縮機モータに供給し、該モータを駆動制御するインバータ制御回路が搭載される。 The outdoor unit of the air conditioner is equipped with an inverter control circuit that supplies AC power supplied from an AC power source to the compressor motor and controls the motor.
　例えば、特許文献１には、パワートランジスタモジュール、ノイズフィルタ回路、ダイオードスタック、コンデンサを一枚の基板上に実装することで、接続電線数を減らし、材料費、組立費を低減させたインバータ制御回路が開示されている。 For example, Patent Document 1 discloses an inverter control circuit in which a power transistor module, a noise filter circuit, a diode stack, and a capacitor are mounted on a single substrate, thereby reducing the number of connected wires and reducing material costs and assembly costs. Is disclosed.
　また、例えば、特許文献２には、インバータを構成する電気部品を多層構造に配置し、インバータの小形化、布線数の削減、等を図ることで、インバータを収納する室外機ユニットの小形化、原価低減を達成した空気調和機の室外ユニットが開示されている。 Further, for example, in Patent Document 2, the electric parts constituting the inverter are arranged in a multi-layer structure, and the downsizing of the inverter, the number of wirings, etc. are reduced, thereby downsizing the outdoor unit that stores the inverter. An outdoor unit of an air conditioner that achieves cost reduction is disclosed.
　また、例えば、特許文献３には、機種ごとに固有の特性や機能に係る固有データを記憶させた記憶素子を、制御回路に組込み、共通基板化によりコスト低減を図った空気調和機の制御回路が開示されている。 Further, for example, in Patent Document 3, a control element for an air conditioner that incorporates a storage element storing unique data relating to characteristics and functions unique to each model into a control circuit, and reduces costs by using a common substrate. Is disclosed.
特開Ｈ１０－２０５８３０号公報JP H10-205830 特開Ｈ６－１２３４４９号公報Japanese Patent Laid-Open No. H6-123449 特開Ｈ５－１７２３９０号公報Japanese Patent Application Laid-Open No. H5-172390
　空気調和機の室外機において、圧縮機モータを駆動制御する圧縮機用インバータと、ファンモータを駆動制御するファン用インバータとは、通常別の基板に搭載され、各基板は、ハーネス等によって電気的に接続される。 In an outdoor unit of an air conditioner, a compressor inverter that drives and controls a compressor motor and a fan inverter that drives and controls a fan motor are usually mounted on separate boards, and each board is electrically connected by a harness or the like. Connected to.
　しかしながら、ファン用インバータは、圧縮機用インバータと比較して定格電流が小さいため、ハーネスに重畳するノイズの影響を受け易い。このため、圧縮機用インバータとファン用インバータとが、別の基板に搭載されると、ファンモータの駆動に不具合が発生し、空気調和機の性能が低下するという問題がある。 However, the fan inverter has a smaller rated current than the compressor inverter, and thus is easily affected by noise superimposed on the harness. For this reason, when the compressor inverter and the fan inverter are mounted on different boards, there is a problem in that a problem occurs in driving the fan motor and the performance of the air conditioner is degraded.
　そこで、本発明は、空気調和機の性能の低下の防止、若しくは性能を向上させることを課題とする。 Therefore, an object of the present invention is to prevent the performance of the air conditioner from being lowered or to improve the performance.
　前記課題を解決するために、本発明は、交流電源から供給される交流電力を直流電力に変換するコンバータと、前記直流電力を平滑化する平滑部と、平滑化された直流電力を交流電力に変換し、圧縮機モータに供給する圧縮機用インバータと、平滑化された直流電力を交流電力に変換し、ファンモータに供給する、前記圧縮機用インバータよりも定格電流が小さいファン用インバータと、を備え、前記コンバータ、前記平滑部、前記圧縮機用インバータ、及び前記ファン用インバータは、同一の基板に搭載されている、ことを特徴とする。 In order to solve the above problems, the present invention provides a converter that converts AC power supplied from an AC power source into DC power, a smoothing unit that smoothes the DC power, and the smoothed DC power into AC power. A compressor inverter that converts and supplies the compressor motor to the compressor motor, converts the smoothed DC power into AC power, and supplies the fan motor with a fan inverter having a smaller rated current than the compressor inverter; The converter, the smoothing unit, the compressor inverter, and the fan inverter are mounted on the same substrate.
　本発明によれば、空気調和機の性能の低下の防止、若しくは性能を向上させることができる。 According to the present invention, it is possible to prevent the performance of the air conditioner from being lowered or to improve the performance.
本発明の実施形態に係る空気調和機の構成を示す概略図である。It is the schematic which shows the structure of the air conditioner which concerns on embodiment of this invention. 本発明の実施形態に係る制御基板の構成を示す概略図である。It is the schematic which shows the structure of the control board which concerns on embodiment of this invention.
≪空気調和機の構成≫
　まず、図１を参照して、本発明の実施形態に係る空気調和機１の構成について説明する。 ≪Configuration of air conditioner≫
First, with reference to FIG. 1, the structure of the air conditioner 1 which concerns on embodiment of this invention is demonstrated.
　図１に示すように、空気調和機１は、室内機１００と、室外機２００と、を備える。室内機１００は、室内熱交換器１１、室内膨張弁１２、等を備える。室外機２００は、圧縮機２１、四方弁２２、室外熱交換器２３、アキュムレータ２４、室外膨張弁２５、等を備える。 As shown in FIG. 1, the air conditioner 1 includes an indoor unit 100 and an outdoor unit 200. The indoor unit 100 includes an indoor heat exchanger 11, an indoor expansion valve 12, and the like. The outdoor unit 200 includes a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, an accumulator 24, an outdoor expansion valve 25, and the like.
　室内熱交換器１１の付近には、熱交換を促進するための室内ファン１３が設けられ、ファンモータ１３ａが室内ファン１３を駆動させる。また、室外熱交換器２３の付近には、熱交換を促進するための室外ファン２６が設けられ、ファンモータ２６ａが室外ファン２６を駆動させる。また、圧縮機モータ２１ａが圧縮機２１を駆動させる。なお、室外熱交換器２３の付近には、複数の室外ファンが設けられていても良い。 In the vicinity of the indoor heat exchanger 11, an indoor fan 13 for promoting heat exchange is provided, and the fan motor 13a drives the indoor fan 13. An outdoor fan 26 for promoting heat exchange is provided in the vicinity of the outdoor heat exchanger 23, and the fan motor 26 a drives the outdoor fan 26. Further, the compressor motor 21a drives the compressor 21. A plurality of outdoor fans may be provided in the vicinity of the outdoor heat exchanger 23.
　空気調和機１は、ヒートポンプサイクルで冷媒を循環させることによって空調（冷房運転、暖房運転、等）を行う機器である。空気調和機１は、圧縮機２１と、四方弁２２と、室外熱交換器２３と、室外膨張弁２５と、室内膨張弁１２と、室内熱交換器１１と、アキュムレータ２４とが環状に順次接続されてなる冷媒回路Ｑにおいて、周知のヒートポンプサイクルで冷媒を循環させる。実線矢印Ｘは、空気調和機１が冷房運転を行う場合における冷媒の循環方向を示し、破線矢印Ｙは、空気調和機１が暖房運転を行う場合における冷媒の循環方向を示している。 The air conditioner 1 is a device that performs air conditioning (cooling operation, heating operation, etc.) by circulating a refrigerant in a heat pump cycle. In the air conditioner 1, a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, an outdoor expansion valve 25, an indoor expansion valve 12, an indoor heat exchanger 11, and an accumulator 24 are sequentially connected in an annular manner. In the refrigerant circuit Q thus formed, the refrigerant is circulated by a known heat pump cycle. The solid line arrow X indicates the refrigerant circulation direction when the air conditioner 1 performs the cooling operation, and the broken line arrow Y indicates the refrigerant circulation direction when the air conditioner 1 performs the heating operation.
　例えば、空気調和機１が冷房運転を行う場合、圧縮機２１によって圧縮された高温高圧の冷媒は、四方弁２２を通過して室外熱交換器２３へと流入し、空気との熱交換によって、凝縮され液化した後、室内膨張弁１２で減圧され、室内熱交換器１１へと流入する。室内熱交換器１１へと流入した冷媒は、空気からの吸熱作用によって蒸発した後、アキュムレータ２４を介して、圧縮機２１へと戻る。圧縮機２１に戻った冷媒は、再び高温高圧に圧縮され、四方弁２２、室外熱交換器２３、室外膨張弁２５、室内膨張弁１２、室内熱交換器１１、アキュムレータ２４を循環する。この循環が繰り返されることでヒートポンプサイクルが構成される。 For example, when the air conditioner 1 performs a cooling operation, the high-temperature and high-pressure refrigerant compressed by the compressor 21 passes through the four-way valve 22 and flows into the outdoor heat exchanger 23, and by heat exchange with air, After being condensed and liquefied, the pressure is reduced by the indoor expansion valve 12 and flows into the indoor heat exchanger 11. The refrigerant that has flowed into the indoor heat exchanger 11 evaporates due to heat absorption from the air, and then returns to the compressor 21 via the accumulator 24. The refrigerant returned to the compressor 21 is compressed again to a high temperature and a high pressure, and circulates through the four-way valve 22, the outdoor heat exchanger 23, the outdoor expansion valve 25, the indoor expansion valve 12, the indoor heat exchanger 11, and the accumulator 24. A heat pump cycle is configured by repeating this circulation.
≪制御基板の構成≫
　次に、図２を参照して、本発明の実施形態に係る空気調和機１の室外機２００に搭載される制御基板２の構成について説明する。 <Control board configuration>
Next, with reference to FIG. 2, the structure of the control board 2 mounted in the outdoor unit 200 of the air conditioner 1 which concerns on embodiment of this invention is demonstrated.
　制御基板２は、コンバータ２０１と、平滑部２０２と、圧縮機用インバータ２０３と、ファン用インバータ２０４と、制御部２０５と、電圧検出回路２０６と、電流検出回路２０７と、電源回路２０８と、ドライバ回路２０９と、電流センサ２１０と、吐出圧力センサ２１１と、吐出圧力検出回路２１２と、を備える。即ち、コンバータ２０１と、平滑部２０２と、圧縮機用インバータ２０３と、ファン用インバータ２０４と、制御部２０５と、電圧検出回路２０６と、電流検出回路２０７と、電源回路２０８と、ドライバ回路２０９と、電流センサ２１０と、吐出圧力センサ２１１と、吐出圧力検出回路２１２とは、同一の基板に搭載されている。直流部Ｉ0における基準電圧ＶＦは、圧縮機用インバータ２０３と、ファン用インバータ２０４とで共通である。また、太い線は、動力線を示し、細い線は、信号線を示している。 The control board 2 includes a converter 201, a smoothing unit 202, a compressor inverter 203, a fan inverter 204, a control unit 205, a voltage detection circuit 206, a current detection circuit 207, a power supply circuit 208, and a driver. A circuit 209, a current sensor 210, a discharge pressure sensor 211, and a discharge pressure detection circuit 212 are provided. That is, the converter 201, the smoothing unit 202, the compressor inverter 203, the fan inverter 204, the control unit 205, the voltage detection circuit 206, the current detection circuit 207, the power supply circuit 208, and the driver circuit 209 The current sensor 210, the discharge pressure sensor 211, and the discharge pressure detection circuit 212 are mounted on the same substrate. The reference voltage VF in the DC unit I 0 is common to the compressor inverter 203 and the fan inverter 204. A thick line indicates a power line, and a thin line indicates a signal line.
　図２では、２つのファン用インバータ２０４が、制御基板２に搭載される場合を、一例に挙げて説明するが、制御基板２に搭載されるファン用インバータ２０４の個数は、特に限定されるものではない。図２に示す直流部Ｉ0に、ファン用インバータ２０４を追加接続することで、制御基板２に搭載されるファン用インバータ２０４の個数を増やすことが可能である。 In FIG. 2, the case where two fan inverters 204 are mounted on the control board 2 will be described as an example. However, the number of fan inverters 204 mounted on the control board 2 is particularly limited. is not. It is possible to increase the number of fan inverters 204 mounted on the control board 2 by additionally connecting the fan inverters 204 to the DC unit I 0 shown in FIG.
　コンバータ２０１は、複数の整流素子２５１を備え、該素子がブリッジ結線された回路である。コンバータ２０１は、ノイズフィルター２３０を介して、三相交流電源２２０から供給される交流電力を直流電力に変換し、変換した直流電力を平滑部２０２に供給する。 The converter 201 includes a plurality of rectifying elements 251 and is a circuit in which the elements are bridge-connected. The converter 201 converts the AC power supplied from the three-phase AC power source 220 into DC power via the noise filter 230 and supplies the converted DC power to the smoothing unit 202.
　平滑部２０２は、コンバータ２０１によって変換された直流電圧を平滑化し、平滑化した直流電力を、圧縮機用インバータ２０３、及び２つのファン用インバータ２０４に供給する。平滑部２０２は、平滑コンデンサ２２１と、力率改善用リアクトル２２２と、電磁接触器２２３と、突入電流制限抵抗器２２４と、を備える。 The smoothing unit 202 smoothes the DC voltage converted by the converter 201 and supplies the smoothed DC power to the compressor inverter 203 and the two fan inverters 204. The smoothing unit 202 includes a smoothing capacitor 221, a power factor improving reactor 222, an electromagnetic contactor 223, and an inrush current limiting resistor 224.
　平滑コンデンサ２２１、力率改善用リアクトル２２２、電磁接触器２２３、及び突入電流制限抵抗器２２４は、コンバータ２０１と、圧縮機用インバータ２０３又は２つのファン用インバータ２０４と、の間に設けられる。力率改善用リアクトル２２２は、一方の端子が平滑コンデンサ２２１と接続され、他方の端子が電磁接触器２２３及び突入電流制限抵抗器２２４と接続される。電源が投入される際に、閉路する電磁接触器２２３が、平滑コンデンサ２２１に流れる過大な突入電流によって溶着しないように、電磁接触器２２３と突入電流制限抵抗器２２４とは、並列に設けられる。 The smoothing capacitor 221, the power factor improving reactor 222, the magnetic contactor 223, and the inrush current limiting resistor 224 are provided between the converter 201 and the compressor inverter 203 or the two fan inverters 204. The power factor improving reactor 222 has one terminal connected to the smoothing capacitor 221 and the other terminal connected to the electromagnetic contactor 223 and the inrush current limiting resistor 224. The electromagnetic contactor 223 and the inrush current limiting resistor 224 are provided in parallel so that the electromagnetic contactor 223 that is closed when the power is turned on does not weld due to an excessive inrush current flowing through the smoothing capacitor 221.
　圧縮機用インバータ２０３は、コンバータ２０１及び圧縮機モータ２１ａと接続される。圧縮機用インバータ２０３は、平滑部２０２によって平滑化された直流電力を、Ｕ相、Ｖ相、Ｗ相の三相交流電力に変換し、圧縮機モータ２１ａに供給する。また、圧縮機用インバータ２０３は、ドライバ回路２０９から入力される駆動信号に基づいて、圧縮機モータ２１ａの回転速度（運転周波数）を変化させて、圧縮機モータ２１ａを駆動制御する。 The compressor inverter 203 is connected to the converter 201 and the compressor motor 21a. The compressor inverter 203 converts the DC power smoothed by the smoothing unit 202 into U-phase, V-phase, and W-phase three-phase AC power, and supplies it to the compressor motor 21a. The compressor inverter 203 controls the drive of the compressor motor 21a by changing the rotation speed (operation frequency) of the compressor motor 21a based on the drive signal input from the driver circuit 209.
　圧縮機用インバータ２０３は、複数のスイッチング素子２３１と、複数のフライホイール素子２３２とを備え、複数のスイッチング素子２３１が、三相ブリッジ結線された回路である。各スイッチング素子２３１と併設してフライホイール素子２３２が設けられる。フライホイール素子２３２は、スイッチング素子２３１のスイッチング動作により発生する逆起電力を回生する。圧縮機用インバータ２０３が、ドライバ回路２０９から入力される駆動信号に基づいて、各スイッチング素子２３１のスイッチング動作を制御することで、圧縮機用インバータ２０３において、交流電力が生成される。 The compressor inverter 203 includes a plurality of switching elements 231 and a plurality of flywheel elements 232, and the switching elements 231 are three-phase bridge-connected circuits. A flywheel element 232 is provided along with each switching element 231. The flywheel element 232 regenerates counter electromotive force generated by the switching operation of the switching element 231. The compressor inverter 203 controls the switching operation of each switching element 231 based on the drive signal input from the driver circuit 209, so that AC power is generated in the compressor inverter 203.
　圧縮機用インバータ２０３の定格電流は、２０[Ａ]以上である。該定格電流は、圧縮機用インバータが駆動することができる直流電流の最小値である。 The rated current of the compressor inverter 203 is 20 [A] or more. The rated current is the minimum value of the direct current that can be driven by the compressor inverter.
　ファン用インバータ２０４は、コンバータ２０１及びファンモータ２６ａと接続される。ファン用インバータ２０４は、平滑部２０２によって平滑化された直流電力を、Ｕ相、Ｖ相、Ｗ相の三相交流電力に変換し、ファンモータ２６ａに供給する。また、ファン用インバータ２０４は、制御部２０５から入力される駆動信号に基づいて、ファンモータ２６ａの回転速度（運転周波数）を変化させて、ファンモータ２６ａを駆動制御する。 The fan inverter 204 is connected to the converter 201 and the fan motor 26a. The fan inverter 204 converts the DC power smoothed by the smoothing unit 202 into U-phase, V-phase, and W-phase three-phase AC power and supplies it to the fan motor 26a. Further, the fan inverter 204 controls the drive of the fan motor 26a by changing the rotational speed (operation frequency) of the fan motor 26a based on the drive signal input from the control unit 205.
　ファン用インバータ２０４は、複数のスイッチング素子２４１と、複数のフライホイール素子２４２とを備え、複数のスイッチング素子２４１が、三相ブリッジ結線された回路である。各スイッチング素子２４１と併設してフライホイール素子２４２が設けられる。フライホイール素子２４２は、スイッチング素子２４１のスイッチング動作により発生する逆起電力を回生する。また、ファン用インバータ２０４が、制御部２０５から入力される駆動信号に基づいて、各スイッチング素子２４１のスイッチング動作を制御することで、ファン用インバータ２０４において、交流電力が生成される。 The fan inverter 204 includes a plurality of switching elements 241 and a plurality of flywheel elements 242, and the plurality of switching elements 241 are three-phase bridge-connected circuits. A flywheel element 242 is provided along with each switching element 241. The flywheel element 242 regenerates back electromotive force generated by the switching operation of the switching element 241. Further, the fan inverter 204 controls the switching operation of each switching element 241 based on the drive signal input from the control unit 205, whereby AC power is generated in the fan inverter 204.
　ファン用インバータ２０４の定格電流は、圧縮機用インバータ２０３の定格電流の１／４以下である。該定格電流は、ファン用インバータが駆動することができる直流電流の最小値である。このように、ファン用インバータは、圧縮機用インバータと比較して、定格電流が小さい。このため、圧縮機用インバータ、ファン用インバータ、制御部、等が別の基板に搭載されてしまうと、ファン用インバータは、圧縮機用インバータと比較して、各基板を電気的に接続するために必要なハーネスに重畳するノイズの影響を受け易くなる。しかしながら、本実施形態では、圧縮機用インバータ、ファン用インバータ、制御部、等が全て同一の制御基板２に搭載されているため、各基板を電気的に接続するハーネスが不要となり、ノイズの影響を最小限に抑えることができる。 The rated current of the fan inverter 204 is ¼ or less of the rated current of the compressor inverter 203. The rated current is the minimum value of the direct current that can be driven by the fan inverter. Thus, the fan inverter has a smaller rated current than the compressor inverter. For this reason, if a compressor inverter, a fan inverter, a control unit, etc. are mounted on another board, the fan inverter electrically connects each board compared to the compressor inverter. It becomes easy to receive the influence of the noise superimposed on the harness required for the. However, in this embodiment, since the compressor inverter, the fan inverter, the control unit, and the like are all mounted on the same control board 2, a harness for electrically connecting the boards is unnecessary, and the influence of noise Can be minimized.
　制御部２０５は、ドライバ回路２０９に制御信号を出力し、ドライバ回路２０９を介して、圧縮機用インバータ２０３を制御する。また、制御部２０５は、２つのファン用インバータ２０４に駆動信号を出力し、２つのファン用インバータ２０４を制御する。圧縮機用インバータ２０３、２つのファン用インバータ２０４をそれぞれ制御する制御部を、共通化することで、制御部の個数を減らし、安価且つ信頼性の高い制御基板２を提供することが可能になる。 The control unit 205 outputs a control signal to the driver circuit 209, and controls the compressor inverter 203 via the driver circuit 209. The control unit 205 outputs a drive signal to the two fan inverters 204 to control the two fan inverters 204. By using a common control unit for controlling the compressor inverter 203 and the two fan inverters 204, it is possible to reduce the number of control units and to provide a control board 2 that is inexpensive and highly reliable. .
　また、制御部２０５は、室内膨張弁１２又は室外膨張弁２５の開度、室内ファン１３及び室外ファン２６の回転速度、冷房／暖房の運転モードを切り替える四方弁２２、等を制御する。 Further, the control unit 205 controls the opening degree of the indoor expansion valve 12 or the outdoor expansion valve 25, the rotational speeds of the indoor fan 13 and the outdoor fan 26, the four-way valve 22 for switching the cooling / heating operation mode, and the like.
　制御部２０５は、センサレスタイプのベクトル制御機能を有する。従って、制御部２０５は、圧縮機モータ２１ａ及びファンモータ２６ａの回転速度や位相（磁極位置）を推定することが可能である。また、制御部２０５は、電流検出回路２０７によって検出される電流（直流部Ｉ0を流れる電流）に基づいて、圧縮機モータ２１ａ及びファンモータ２６ａの駆動電流を再現することが可能である。これにより、速度センサ、磁極位置センサ、交流電流を検出する電流センサ等を、制御基板２に搭載せずに済むため、制御基板２を簡易な構成とすることができる。 The control unit 205 has a sensorless type vector control function. Therefore, the control unit 205 can estimate the rotation speed and phase (magnetic pole position) of the compressor motor 21a and the fan motor 26a. The control unit 205, based on the current detected by the current detection circuit 207 (the current flowing through the DC portion I 0), it is possible to reproduce the driving current of the compressor motor 21a and a fan motor 26a. Thereby, since it is not necessary to mount a speed sensor, a magnetic pole position sensor, a current sensor for detecting an alternating current, and the like on the control board 2, the control board 2 can have a simple configuration.
　電圧検出回路２０６は、コンバータ２０１から出力される直流電圧を検出し、検出した直流電圧が不足電圧であるか否かを確認して、検出結果を制御部２０５へと出力する。 The voltage detection circuit 206 detects the DC voltage output from the converter 201, confirms whether or not the detected DC voltage is an insufficient voltage, and outputs the detection result to the control unit 205.
　電流検出回路２０７は、電流センサ２１０を用いて、直流部Ｉ0を流れる電流を検出し、検出結果を制御部２０５へと出力する。 The current detection circuit 207 detects the current flowing through the DC unit I 0 using the current sensor 210 and outputs the detection result to the control unit 205.
　電源回路２０８は、コンバータ２０１によって変換され、更に平滑部２０２によって平滑化された直流電圧（高電圧）を、例えば、５[Ｖ]、あるいは１５[Ｖ]程度の制御電圧（低電圧）に調整し、制御部２０５、ドライバ回路２０９、等に供給する。 The power supply circuit 208 adjusts the DC voltage (high voltage) converted by the converter 201 and further smoothed by the smoothing unit 202 to, for example, a control voltage (low voltage) of about 5 [V] or 15 [V]. To the control unit 205, the driver circuit 209, and the like.
　ドライバ回路２０９は、制御部２０５と圧縮機用インバータ２０３との間に設けられる。ドライバ回路２０９は、制御部２０５から入力される微弱な信号（例えば、ＰＷＭ信号）を、圧縮機用インバータ２０３に備えられるスイッチング素子２３１が駆動できるレベルまで増幅し、駆動信号を圧縮機用インバータ２０３へと出力する。例えば、ドライバ回路２０９が、圧縮機用インバータ２０３へのＰＷＭ信号の出力を開始すると、圧縮機用インバータ２０３に備えられるスイッチング素子２３１がスイッチング動作を行い、圧縮機用インバータ２０３は駆動する。また、例えば、ドライバ回路２０９が、圧縮機用インバータ２０３へのＰＷＭ信号の出力を停止すると、圧縮機用インバータ２０３に備えられるスイッチング素子２３１がスイッチング動作を停止し、圧縮機用インバータ２０３は停止する。 The driver circuit 209 is provided between the control unit 205 and the compressor inverter 203. The driver circuit 209 amplifies a weak signal (for example, a PWM signal) input from the control unit 205 to a level at which the switching element 231 included in the compressor inverter 203 can be driven, and the drive signal is amplified by the compressor inverter 203. To output. For example, when the driver circuit 209 starts outputting a PWM signal to the compressor inverter 203, the switching element 231 provided in the compressor inverter 203 performs a switching operation, and the compressor inverter 203 is driven. Further, for example, when the driver circuit 209 stops outputting the PWM signal to the compressor inverter 203, the switching element 231 provided in the compressor inverter 203 stops the switching operation, and the compressor inverter 203 stops. .
　電流センサ２１０は、コンバータ２０１と接続され、直流部Ｉ0を流れる電流、即ち、圧縮機用インバータ２０３、及び２つのファン用インバータ２０４に入力される直流電流を検出し、検出した電流を、電流検出回路２０７へと出力する。なお、制御基板２には、過電流に対する保護機能や、制御電圧の低下に対する保護機能が備えられていても良い。各保護機能が作動したときには、各回路は、異常信号を制御部２０５へ出力し、圧縮機用インバータ２０３、及び２つのファン用インバータ２０４を停止させることも可能である。 The current sensor 210 is connected to the converter 201 and detects a current flowing through the DC unit I 0, that is, a DC current input to the compressor inverter 203 and the two fan inverters 204. Output to the detection circuit 207. The control board 2 may be provided with a protection function against overcurrent and a protection function against a decrease in control voltage. When each protection function is activated, each circuit can output an abnormal signal to the control unit 205 to stop the compressor inverter 203 and the two fan inverters 204.
　吐出圧力センサ２１１は、吐出圧力検出回路２１２と接続され、圧縮機２１の吐出圧力を検出し、検出した圧力を、吐出圧力検出回路２１２へと出力する。吐出圧力センサ２１１は、吐出圧力が所定閾値以上であるか否かに基づいて、スイッチング動作を行う。 The discharge pressure sensor 211 is connected to the discharge pressure detection circuit 212, detects the discharge pressure of the compressor 21, and outputs the detected pressure to the discharge pressure detection circuit 212. The discharge pressure sensor 211 performs a switching operation based on whether or not the discharge pressure is greater than or equal to a predetermined threshold value.
　吐出圧力検出回路２１２は、吐出圧力センサ２１１を用いて、吐出圧力を検出し、検出結果を制御部２０５へと出力する。 The discharge pressure detection circuit 212 detects the discharge pressure using the discharge pressure sensor 211 and outputs the detection result to the control unit 205.
　上述のように、本実施形態に係る制御基板２には、圧縮機用インバータ、２つのファン用インバータ、平滑部、制御部、等が全て搭載されている。即ち、圧縮機用インバータ、２つのファン用インバータ、平滑部、制御部、等が別の基板に搭載されている場合に必要とされる、各基板を電気的に接続するハーネスが不要となる。これにより、圧縮機用インバータと比較して定格電流が小さいファン用インバータは、ハーネスに重畳するノイズの影響を受けることなく、正常に駆動することができる。従って、ファン用インバータが駆動停止してしまう、室外機における熱交換がスムーズに行えない、等、従来の空気調和機に生じていた不具合を回避し、空気調和機１の性能を向上させることができる。また、同一の制御部で、圧縮機用インバータ及び２つのファン用インバータを制御することで、安価且つ信頼性の高い制御基板２を提供することができるため、空気調和機１の性能の低下を防止するばかりか、性能を向上させることができる。 As described above, the control board 2 according to the present embodiment is mounted with an inverter for compressor, two inverters for fan, a smoothing unit, a control unit, and the like. That is, the harness for electrically connecting the respective boards, which is required when the compressor inverter, the two fan inverters, the smoothing unit, the control unit, and the like are mounted on different substrates, is not necessary. Thus, the fan inverter having a smaller rated current than the compressor inverter can be driven normally without being affected by noise superimposed on the harness. Therefore, it is possible to avoid the problems that have occurred in the conventional air conditioner, such as the fan inverter being stopped, heat exchange in the outdoor unit not being performed smoothly, and improving the performance of the air conditioner 1. it can. Moreover, since the control board 2 with low cost and high reliability can be provided by controlling the inverter for compressor and the inverter for two fans by the same control unit, the performance of the air conditioner 1 is reduced. In addition to preventing, it can improve performance.
　１００，２００　無線給電装置
　１　　　　　　　空気調和機
　２　　　　　　　制御基板（基板）
　２０１　　　　　コンバータ
　２０２　　　　　平滑部
　２０３　　　　　圧縮機用インバータ
　２０４　　　　　ファン用インバータ
　２０５　　　　　制御部
　２１ａ　　　　　圧縮機モータ
　２６ａ　　　　　ファンモータ 100, 200 Wireless power supply device 1 Air conditioner 2 Control board (board)
201 converter 202 smoothing unit 203 inverter for compressor 204 inverter for fan 205 control unit 21a compressor motor 26a fan motor

Claims (4)

  1. 　交流電源から供給される交流電力を直流電力に変換するコンバータと、
    　前記直流電力を平滑化する平滑部と、
    　平滑化された直流電力を交流電力に変換し、圧縮機モータに供給する圧縮機用インバータと、
    　平滑化された直流電力を交流電力に変換し、ファンモータに供給する、前記圧縮機用インバータよりも定格電流が小さいファン用インバータと、
    　を備え、
    　前記コンバータ、前記平滑部、前記圧縮機用インバータ、及び前記ファン用インバータは、同一の基板に搭載されている、
    　ことを特徴とする空気調和機。     A converter that converts AC power supplied from an AC power source into DC power;
    A smoothing unit for smoothing the DC power;
    An inverter for a compressor that converts the smoothed DC power into AC power and supplies it to the compressor motor;
    Converting the smoothed DC power into AC power and supplying the fan motor with a fan inverter having a smaller rated current than the compressor inverter,
    With
    The converter, the smoothing unit, the compressor inverter, and the fan inverter are mounted on the same substrate.
    An air conditioner characterized by that.
  2. 　前記ファン用インバータは、複数である、
    　ことを特徴とする請求項１に記載の空気調和機。     The fan inverter is plural.
    The air conditioner according to claim 1.
  3. 　前記基板に搭載される制御部を備え、
    　前記制御部は、前記圧縮機用インバータ及び前記ファン用インバータを制御する、
    　ことを特徴とする請求項１に記載の空気調和機。     A control unit mounted on the substrate;
    The controller controls the compressor inverter and the fan inverter.
    The air conditioner according to claim 1.
  4. 　前記圧縮機用インバータの定格電流は、２０[Ａ]以上である、
    　ことを特徴とする請求項１から請求項３のいずれか一項に記載の空気調和機。     The rated current of the compressor inverter is 20 [A] or more.
    The air conditioner as described in any one of Claims 1-3 characterized by the above-mentioned.
PCT/JP2017/042719 2017-02-02 2017-11-29 Air conditioner WO2018142738A1 (en)

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Application Number Priority Date Filing Date Title
JP2017-017486 2017-02-02
JP2017017486A JP2018125997A (en) 2017-02-02 2017-02-02 Air conditioner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024053006A1 (en) * 2022-09-07 2024-03-14 三菱電機株式会社 Outdoor unit for air conditioner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0835713A (en) * 1994-07-26 1996-02-06 Fujitsu General Ltd Method and apparatus for controlling air conditioner
JPH11211194A (en) * 1998-01-30 1999-08-06 Daikin Ind Ltd Controller for outdoor unit
JP2003106605A (en) * 2001-09-28 2003-04-09 Matsushita Electric Ind Co Ltd Control device for air conditioner
WO2016006106A1 (en) * 2014-07-11 2016-01-14 日立アプライアンス株式会社 Air conditioner outdoor unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0835713A (en) * 1994-07-26 1996-02-06 Fujitsu General Ltd Method and apparatus for controlling air conditioner
JPH11211194A (en) * 1998-01-30 1999-08-06 Daikin Ind Ltd Controller for outdoor unit
JP2003106605A (en) * 2001-09-28 2003-04-09 Matsushita Electric Ind Co Ltd Control device for air conditioner
WO2016006106A1 (en) * 2014-07-11 2016-01-14 日立アプライアンス株式会社 Air conditioner outdoor unit

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