JP2014122732A - Air conditioner - Google Patents

Air conditioner Download PDF

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JP2014122732A
JP2014122732A JP2012278259A JP2012278259A JP2014122732A JP 2014122732 A JP2014122732 A JP 2014122732A JP 2012278259 A JP2012278259 A JP 2012278259A JP 2012278259 A JP2012278259 A JP 2012278259A JP 2014122732 A JP2014122732 A JP 2014122732A
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communication
outdoor unit
power
indoor unit
power supply
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JP2012278259A
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JP5661090B2 (en
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Koichi Iijima
宏一 飯島
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2012278259A priority Critical patent/JP5661090B2/en
Priority to ES13191572T priority patent/ES2767574T3/en
Priority to EP13191572.0A priority patent/EP2746687B1/en
Publication of JP2014122732A publication Critical patent/JP2014122732A/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
    • F24F1/0003—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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • 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
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain an air conditioner which can automatically switch an indoor machine power receiving system and an outdoor machine power receiving system according to a status of product installation without the necessity for a part for setting an indoor power receiving type or an outdoor power receiving type, and the necessity for setting work at product shipment or the product installation, and can reduce management costs at production and after the product shipment, part costs and part mounting costs.SOLUTION: It is determined whether or not communication to an indoor machine side communication circuit from an outdoor machine side communication circuit is normally performed at the start of power reception to an indoor machine side control base board (ST102), when the communication to the indoor machine side communication circuit from the outdoor machine side communication circuit is normally performed (ST102; Yes), power supply control is performed by considering that the air conditioner is operated by the outdoor machine power receiving system (ST103), and when the communication to the indoor machine side communication circuit from the outdoor machine side communication circuit is not normally performed (ST102; No), the power supply control is performed by considering that the air conditioner is operated by the indoor machine power receiving system (ST105).

Description

本発明は、空気調和機に関する。   The present invention relates to an air conditioner.

従来の空気調和機においては、商用電源の受電方式として、室内機に供給された商用電源を、電源配線を介して室外機に供給する方式（以下、「室内機受電方式」という）、および、室外機側で商用電源を受電して室内機に供給する方式（以下、「室外機受電方式」という）がある。一般に、室内機受電方式では、運転待機時の消費電力（以下、「待機電力」という）の削減を目的として、室内機から室外機への電力供給経路にパワーリレーを設け、運転待機時には室外機への給電を停止するようにしているが、室外機受電方式では、このパワーリレーは不要となる。   In a conventional air conditioner, as a method for receiving commercial power, a method for supplying commercial power supplied to an indoor unit to an outdoor unit via power supply wiring (hereinafter referred to as “indoor unit power receiving method”), and There is a method of receiving commercial power on the outdoor unit side and supplying it to the indoor unit (hereinafter referred to as “outdoor unit power receiving method”). Generally, in the indoor unit power receiving system, a power relay is provided in the power supply path from the indoor unit to the outdoor unit for the purpose of reducing power consumption during operation standby (hereinafter referred to as “standby power”). However, in the outdoor unit power receiving system, this power relay is not necessary.

室内機受電方式と室外機受電方式とを切り替える手法としては、例えば、「記憶装置、またはジャンパー線やスイッチなどの切替器を有して構成される」受電方式データ部を具備し、記憶装置に記憶された室内機受電方式、および室外機受電方式を識別する情報や、ジャンパー線の有無あるいは位置、切替器の切り替えにより、室内機受電方式と室外機受電方式との切り替えを行うものがある（例えば、特許文献１参照）。   As a method of switching between the indoor unit power receiving method and the outdoor unit power receiving method, for example, a power receiving method data section “configured with a storage device or a switch such as a jumper wire or a switch” is provided. There is information that identifies the stored indoor unit power receiving method and the outdoor unit power receiving method, the presence / absence or position of a jumper wire, and switching of the switching unit to switch between the indoor unit power receiving method and the outdoor unit power receiving method ( For example, see Patent Document 1).

特開２０１２−１１７７０４号公報JP 2012-117704 A

上記特許文献１に代表される従来の空気調和機は、室内受電機種であるか、あるいは室外受電機種であるかの設定は、製品出荷時に記憶装置内の情報やジャンパー線、切替器を設定しておくか、あるいは、空気調和機の据付時に据付作業者が設定する必要がある。   The conventional air conditioner represented by the above-mentioned Patent Document 1 is set as the type of indoor receiving electric machine or the type of outdoor receiving electric machine by setting information in the storage device, a jumper line, and a switch at the time of product shipment. Or it must be set by the installation operator when installing the air conditioner.

製品出荷時に上記設定を行う場合には、室内受電機種用および室外受電機種用に各々室内機と室内制御基板とを用意する必要がある。また、これら室内機と室内制御基板とを、室内受電機種用と室外受電機種用とで各々管理する必要があるため、生産時や製品出荷後の管理コストがかかる、という問題があった。   When the above setting is performed at the time of product shipment, it is necessary to prepare an indoor unit and an indoor control board for each of the indoor receiver type and the outdoor receiver type. In addition, since it is necessary to manage the indoor unit and the indoor control board for each of the indoor receiving electric machine type and the outdoor receiving electric machine type, there is a problem that a management cost is required at the time of production or after product shipment.

また、空気調和機の据え付け時に上記設定を行う場合には、誤設定により正常に動作しない等の不具合を引き起こす虞がある。また、空気調和機の据付時に上記設定を行うためのジャンパー線や切替器等の部品を実装する必要があるため、部品コストや部品実装コストが上昇する、という問題点があった。   In addition, when the above setting is performed when the air conditioner is installed, there is a possibility that a malfunction such as malfunction does not occur due to an incorrect setting. Moreover, since it is necessary to mount components, such as a jumper line and a switch for performing the said setting at the time of installation of an air conditioner, there existed a problem that component cost and component mounting cost rose.

本発明は、上記に鑑みてなされたものであって、室内受電機種であるか、あるいは室外受電機種であるかを設定するための部品や、製品出荷時、あるいは製品据付時の設定作業を要することなく、据え付け時の状況に応じて、室内機受電方式と室外機受電方式とを自動的に切り替え可能な空気調和機を提供することを目的とする。   The present invention has been made in view of the above, and requires parts for setting whether the type is an indoor receiving electric machine type or an outdoor receiving electric machine type, and setting work at the time of product shipment or product installation. An object of the present invention is to provide an air conditioner that can automatically switch between an indoor unit power receiving method and an outdoor unit power receiving method according to the situation at the time of installation.

上述した課題を解決し、目的を達成するため、本発明にかかる空気調和機は、室内機と室外機を具備し、前記室内機に供給された商用電源を、電源配線を介して前記室外機に供給する室内機受電方式、および、前記室外機に供給された前記商用電源を、電源配線を介して前記室内機に供給する室外機受電方式の双方に対応した空気調和機であって、前記室内機は、前記室外機との間で通信線を介して所定の通信を行う通信回路と、前記通信回路による前記室外機との通信可否に応じて電源制御を行う電源制御回路と、を備え、前記電源制御回路は、電力受電開始時において、前記通信回路による前記室外機との通信が可能である場合には、前記室外機受電方式であるものと判定して電源制御を行い、前記通信回路による前記室外機との通信が不可能である場合には、前記室内機受電方式であるものと判定して電源制御を行うことを特徴とする。   In order to solve the above-described problems and achieve the object, an air conditioner according to the present invention includes an indoor unit and an outdoor unit, and commercial power supplied to the indoor unit is connected to the outdoor unit via a power supply wiring. An air conditioner that is compatible with both the indoor unit power receiving method to be supplied to the outdoor unit and the outdoor unit power receiving method for supplying the commercial power supplied to the outdoor unit to the indoor unit through power wiring, The indoor unit includes a communication circuit that performs predetermined communication with the outdoor unit via a communication line, and a power control circuit that performs power control according to whether the communication circuit can communicate with the outdoor unit. The power supply control circuit determines that the outdoor unit power receiving method is used when the communication circuit can communicate with the outdoor unit at the start of power reception, performs power control, and performs the communication. Communication with the outdoor unit through a circuit Where possible, and performing determination to power control as the a indoor unit power receiving system.

本発明によれば、室内受電機種であるか、あるいは室外受電機種であるかを設定するための部品や、製品出荷時、あるいは製品据付時の設定作業を要することなく、製品据付時の状況に応じて、室内機受電方式と室外機受電方式とを自動的に切り替えることができ、生産時や製品出荷後の管理コストや、部品・部品実装コストを削減することができる、という効果を奏する。   According to the present invention, there is no need to set a part for setting whether it is an indoor receiver type or an outdoor receiver type, and a setting operation at the time of product shipment or product installation. Accordingly, it is possible to automatically switch between the indoor unit power receiving method and the outdoor unit power receiving method, and it is possible to reduce the management cost at the time of production or after product shipment, and the component / component mounting cost.

図１は、実施の形態にかかる空気調和機の一構成例における室内機受電方式の配線例を示す図である。FIG. 1 is a diagram illustrating a wiring example of an indoor unit power receiving method in a configuration example of an air conditioner according to an embodiment. 図２は、実施の形態にかかる空気調和機の一構成例における室外機受電方式の配線例を示す図である。FIG. 2 is a diagram illustrating a wiring example of the outdoor unit power receiving method in the configuration example of the air conditioner according to the embodiment. 図３は、実施の形態にかかる空気調和機の室内機における受電方式判定フローの一例を示す図である。FIG. 3 is a diagram illustrating an example of a power reception method determination flow in the indoor unit of the air conditioner according to the embodiment.

以下に添付図面を参照し、本発明の実施の形態にかかる空気調和機について説明する。なお、以下に示す実施の形態により本発明が限定されるものではない。   Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, this invention is not limited by embodiment shown below.

実施の形態．
＜構成＞
図１は、実施の形態にかかる空気調和機の一構成例における室内機受電方式の配線例を示す図である。また、図２は、実施の形態にかかる空気調和機の一構成例における室外機受電方式の配線例を示す図である。図１、図２に示すように、本実施の形態にかかる空気調和機は、室内機１および室外機２を備えている。 Embodiment.
<Configuration>
FIG. 1 is a diagram illustrating a wiring example of an indoor unit power receiving method in a configuration example of an air conditioner according to an embodiment. Moreover, FIG. 2 is a figure which shows the wiring example of the outdoor unit power receiving system in the structural example of the air conditioner concerning Embodiment. As shown in FIGS. 1 and 2, the air conditioner according to the present embodiment includes an indoor unit 1 and an outdoor unit 2.

室内機１は、室内機側制御基板３および室内機側端子台５を備え、室内機側制御基板３は、室内機側電源制御回路７、室内機側通信回路９、および商用電源供給用リレー（以下、単に「リレー」という）１１を備えている。なお、リレー１１は、室内機受電方式にて運用する際に、運転待機時において室外機２への商用電源１２の供給を停止する機能を有している。   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 control circuit 7, an indoor unit side communication circuit 9, and a commercial power supply relay. (Hereinafter simply referred to as “relay”) 11. The relay 11 has a function of stopping the supply of the commercial power supply 12 to the outdoor unit 2 during operation standby when operating in the indoor unit power receiving system.

また、室内機側端子台５は、リレー１１を介して室内機側電源制御回路７の非接地側電源入力端子に接続されるＳ１端子（第１の端子）２１と、室内機側電源制御回路７の接地側電源入力端子に接続されるＳ２端子（第２の端子）２２と、室内機側通信回路９を介して室内機側電源制御回路７の接地側電源入力端子に接続されるＳ３端子（第３の端子）２３と、室内機側電源制御回路７の非接地側電源入力端子に接続されるＬ端子（第４の端子）２４と、Ｓ２端子２２に接続されるＮ端子（第５の端子）２５とを備えている。   The indoor unit side terminal block 5 includes an S1 terminal (first terminal) 21 connected to the non-grounded side power input terminal of the indoor unit side power supply control circuit 7 via the relay 11, and the indoor unit side power supply control circuit. S2 terminal (second terminal) 22 connected to the grounding-side power input terminal 7 and S3 terminal connected to the grounding-side power input terminal of the indoor unit side power supply control circuit 7 via the indoor unit side communication circuit 9 (Third terminal) 23, L terminal (fourth terminal) 24 connected to the non-grounded power input terminal of indoor unit side power supply control circuit 7, and N terminal (fifth terminal) connected to S2 terminal 22 Terminal 25).

Ｌ端子（第４の端子）２４およびＮ端子（第５の端子）２５は、実施の形態にかかる空気調和機を室内機受電方式にて運用する際には、商用電源１２が接続され、室外機受電方式にて運用する際には、室外機２を介して商用電源１２が入力される１組の商用電源入力経路を形成している。また、Ｓ１端子（第１の端子）２１およびＳ２端子（第２の端子）２２は、実施の形態にかかる空気調和機を室内機受電方式にて運用する際に、Ｌ端子（第４の端子）２４およびＮ端子（第５の端子）２５に入力された商用電源１２を、リレー１１を介して室外機２に供給する１組の商用電源出力経路を形成している。   The L terminal (fourth terminal) 24 and the N terminal (fifth terminal) 25 are connected to the commercial power source 12 when the air conditioner according to the embodiment is operated in the indoor unit power receiving system, When operating in the power receiving system, a set of commercial power input paths through which the commercial power 12 is input via the outdoor unit 2 is formed. The S1 terminal (first terminal) 21 and the S2 terminal (second terminal) 22 are the L terminal (fourth terminal) when the air conditioner according to the embodiment is operated in the indoor unit power receiving system. ) 24 and an N terminal (fifth terminal) 25, a set of commercial power output paths for supplying the commercial power supply 12 to the outdoor unit 2 through the relay 11 is formed.

室外機２は、室外機側制御基板４および室外機側端子台６を備え、室外機側制御基板４は、室外機側電源制御回路８および室外機側通信回路１０を備えている。   The outdoor unit 2 includes an outdoor unit side control board 4 and an outdoor unit side terminal block 6, and 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.

また、室外機側端子台６は、室外機側電源制御回路８の非接地側電源入力端子に接続されるＬ１端子（第６の端子）２６と、室外機側電源制御回路８の接地側電源入力端子に接続されるＮ１端子（第７の端子）２７と、室外機側通信回路１０を介して室外機側電源制御回路８の接地側電源入力端子に接続されるＳ３’端子（第８の端子）２８と、Ｌ１端子２６に接続されるＬ２端子（第９の端子）２９と、Ｎ１端子２７に接続されるＮ２端子（第１０の端子）３０とを備えている。   The outdoor unit side terminal block 6 includes an L1 terminal (sixth terminal) 26 connected to the non-ground side power input terminal of the outdoor unit side power control circuit 8 and a ground side power source of the outdoor unit side power control circuit 8. An N1 terminal (seventh terminal) 27 connected to the input terminal and an S3 ′ terminal (eighth terminal) connected to the ground side power input terminal of the outdoor unit side power supply control circuit 8 via the outdoor unit side communication circuit 10. Terminal) 28, an L2 terminal (ninth terminal) 29 connected to the L1 terminal 26, and an N2 terminal (tenth terminal) 30 connected to the N1 terminal 27.

Ｌ１端子（第６の端子）２６およびＮ１端子（第７の端子）２７は、実施の形態にかかる空気調和機を室内機受電方式にて運用する際には、室内機１を介して商用電源１２が入力され、室外機受電方式にて運用する際には、商用電源１２が接続される１組の商用電源入力経路を形成している。また、Ｌ２端子（第９の端子）２９およびＮ２端子（第１０の端子）３０は、実施の形態にかかる空気調和機を室外機受電方式にて運用する際に、Ｌ１端子（第６の端子）２６およびＮ１端子（第７の端子）２７に入力された商用電源１２を室内機１に供給する１組の商用電源出力経路を形成している。   The L1 terminal (sixth terminal) 26 and the N1 terminal (seventh terminal) 27 are connected to the commercial power supply via the indoor unit 1 when the air conditioner according to the embodiment is operated in the indoor unit power receiving system. When 12 is input and the outdoor power receiving system is used, a set of commercial power input paths to which the commercial power 12 is connected is formed. The L2 terminal (ninth terminal) 29 and the N2 terminal (tenth terminal) 30 are the L1 terminal (sixth terminal) when the air conditioner according to the embodiment is operated in the outdoor unit power receiving system. ) 26 and the N1 terminal (seventh terminal) 27, a set of commercial power supply output paths for supplying the commercial power supply 12 to the indoor unit 1 is formed.

図１に示す例は、上述したように室内機受電方式の配線例を示しており、室内機１側のＬ端子２４とＮ端子２５との間に商用電源１２が接続され、室内機１側のＳ１端子２１と室外機２側のＬ１端子２６との間が電源線１３で接続され、室内機１側のＳ２端子２２と室外機２側のＮ１端子２７との間が電源通信共通線１４で接続され、室内機１側のＳ３端子２３と室外機２側のＳ３’端子２８との間が通信線１５で接続される。このように接続することにより、室内機側端子台５のＬ端子２４とＮ端子２５との間に供給された商用電源１２からの電力が室内機側電源制御回路７に供給され、室内機側電源制御回路７がリレー１１を閉じることで電源線１３、電源通信共通線１４を介して室外機側電源制御回路８にも電力が供給される。   The example shown in FIG. 1 shows a wiring example of the indoor unit power receiving system as described above, and the commercial power supply 12 is connected between the L terminal 24 and the N terminal 25 on the indoor unit 1 side, and the indoor unit 1 side The S1 terminal 21 and the L1 terminal 26 on the outdoor unit 2 side are connected by the power line 13, and the S2 terminal 22 on the indoor unit 1 side and the N1 terminal 27 on the outdoor unit 2 side are connected to the power communication common line 14. The communication line 15 connects between the S3 terminal 23 on the indoor unit 1 side and the S3 ′ terminal 28 on the outdoor unit 2 side. By connecting in this way, the electric power from the commercial power supply 12 supplied between the L terminal 24 and the N terminal 25 of the indoor unit side terminal block 5 is supplied to the indoor unit side power supply control circuit 7, and the indoor unit side When the power supply control circuit 7 closes the relay 11, power is also supplied to the outdoor unit side power supply control circuit 8 via the power supply line 13 and the power supply communication common line 14.

図２に示す例は、上述したように室外機受電方式の配線例を示しており、室外機２側のＬ１端子２６とＮ１端子２７との間に商用電源１２が接続され、室内機１側のＬ端子２４と室外機２側のＬ２端子２９との間が電源線１３で接続され、室内機１側のＮ端子２５と室外機２側のＮ２端子３０との間が電源通信共通線１４で接続され、室内機１側のＳ３端子２３と室外機２側のＳ３’端子２８との間が通信線１５で接続される。このように接続することにより、室外機側端子台６のＬ１端子２６とＮ１端子２７との間に供給された商用電源１２からの電力が室外機側電源制御回路８に供給され、電源線１３、電源通信共通線１４を介して室内機側電源制御回路７にも電力が供給される。   The example shown in FIG. 2 shows the wiring example of the outdoor unit power receiving system as described above, and the commercial power source 12 is connected between the L1 terminal 26 and the N1 terminal 27 on the outdoor unit 2 side, and the indoor unit 1 side The L terminal 24 and the L2 terminal 29 on the outdoor unit 2 side are connected by a power line 13, and the N terminal 25 on the indoor unit 1 side and the N2 terminal 30 on the outdoor unit 2 side are connected to the power communication common line 14. The communication line 15 connects between the S3 terminal 23 on the indoor unit 1 side and the S3 ′ terminal 28 on the outdoor unit 2 side. By connecting in this way, the electric power from the commercial power supply 12 supplied between the L1 terminal 26 and the N1 terminal 27 of the outdoor unit side terminal block 6 is supplied to the outdoor unit side power supply control circuit 8, and the power line 13 The power is also supplied to the indoor unit side power supply control circuit 7 through the power communication common line 14.

室内機側通信回路９は、信号線１５、電源信号共通線１４を介して、室外機側制御基板４の室外機側通信回路１０と所定の通信を行う。   The indoor unit side communication circuit 9 performs predetermined communication with the outdoor unit side communication circuit 10 of the outdoor unit side control board 4 via the signal line 15 and the power signal common line 14.

図１に示す室内機受電方式の配線例において、室内機１のＬ端子２４とＮ端子２５との間に商用電源１２を供給すると、室内機側電源制御回路７には商用電源１２から電力が供給されるが、本実施の形態では、この時点ではリレー１１は開放しているものとする。これにより、室外機側制御基板４には電力が供給されていない状態となっている。したがって、この時点では、室内機側通信回路１０には電源が供給されず、室内機側通信回路９と室内機側通信回路１０との間での通信は成立しない。   In the indoor unit power receiving system wiring example shown in FIG. 1, when the commercial power source 12 is supplied between the L terminal 24 and the N terminal 25 of the indoor unit 1, the indoor unit side power control circuit 7 receives power from the commercial power source 12. In this embodiment, it is assumed that the relay 11 is open at this point. Thereby, the electric power is not supplied to the outdoor unit side control board 4. Therefore, at this time, power is not supplied to the indoor unit side communication circuit 10, and communication between the indoor unit side communication circuit 9 and the indoor unit side communication circuit 10 is not established.

本実施の形態にかかる空気調和機の運転待機時において、ワイヤレスリモコン（図示せず）等により空気調和機を動作させるための運転開始信号を受信すると、室内機側電源制御回路７は、リレー１１を短絡させ、室外機側制御基板４に電力を供給する。室外機側制御基板４に電力が供給されると、室内機側通信回路９と室外機側通信回路１０との間で所定の通信を行う。   When an operation start signal for operating the air conditioner is received by a wireless remote controller (not shown) or the like during operation standby of the air conditioner according to the present embodiment, the indoor unit side power supply control circuit 7 Is short-circuited to supply power to the outdoor unit side control board 4. When electric power is supplied to the outdoor unit side control board 4, predetermined communication is performed between the indoor unit side communication circuit 9 and the outdoor unit side communication circuit 10.

一方、本実施の形態にかかる空気調和機の運転時において、ワイヤレスリモコン（図示せず）等により空気調和機を停止させるための運転停止信号を受信すると、室内機側電源制御回路７は、リレー１１を開放させ、室外機側制御基板４への電力供給を停止させる。このように、室内機受電方式の配線例では、運転待機時に室外機側制御基板４への電力供給を停止させることにより、待機電力の削減を図ることができる。   On the other hand, when the operation stop signal for stopping the air conditioner is received by a wireless remote controller (not shown) or the like during the operation of the air conditioner according to the present embodiment, the indoor unit side power supply control circuit 7 11 is opened, and power supply to the outdoor unit side control board 4 is stopped. As described above, in the wiring example of the indoor unit power receiving system, standby power can be reduced by stopping the power supply to the outdoor unit side control board 4 during operation standby.

なお、図示していないが、室内機１には、機械系統として室内熱交換器、室内ファン、センサー、表示器などが設けられている。また同様に、室外機２には、機械系統として室外熱交換器、室外ファン、冷媒切換弁、圧縮機などが設けられている。   Although not shown, the indoor unit 1 is provided with an indoor heat exchanger, an indoor fan, a sensor, a display, and the like as a mechanical system. Similarly, the outdoor unit 2 is provided with an outdoor heat exchanger, an outdoor fan, a refrigerant switching valve, a compressor, and the like as a mechanical system.

図２に示す室外機受電方式の配線例において、室外機２のＬ１端子２６とＮ１端子２７との間に商用電源１２を供給すると、リレー１１を介することなく、室内機側制御基板３および室外機側制御基板４に電力が供給される。また、商用電源１２が供給され続けている間は、室内機側制御基板３および室外機側制御基板４に電力が供給されているため、室内機側通信回路９と室外機側通信回路１０との間での通信が成立する。この室外機受電方式の配線例では、商用電源１２が供給され続けている間は常時通信を行うことにより、室内機１と室外機２との間で常に最新の情報を共有することができるため、運転開始時の立ち上がりを速くすることができる。   In the outdoor unit power receiving system wiring example shown in FIG. 2, when the commercial power supply 12 is supplied between the L1 terminal 26 and the N1 terminal 27 of the outdoor unit 2, the indoor unit side control board 3 and the outdoor unit are not connected via the relay 11. Electric power is supplied to the machine-side control board 4. Further, while the commercial power supply 12 continues to be supplied, power is supplied to the indoor unit side control board 3 and the outdoor unit side control board 4, and therefore the indoor unit side communication circuit 9 and the outdoor unit side communication circuit 10 Communication between the two is established. In this outdoor unit power receiving system wiring example, the latest information can always be shared between the indoor unit 1 and the outdoor unit 2 by always communicating while the commercial power supply 12 is continuously supplied. The start-up at the start of operation can be made faster.

以上、本実施の形態における空気調和機の構成について説明した。つぎに、本実施の形態における空気調和機の動作について説明する。   In the above, the structure of the air conditioner in this Embodiment was demonstrated. Next, the operation of the air conditioner in the present embodiment will be described.

＜動作＞
図１および図２に示す例では、同一の室内機側制御基板３により室内機受電方式および室外機受電方式の双方に対応可能な構成例について説明した。ここでは、実施の形態にかかる空気調和機の室内機における受電方式判定手順について、図１〜図３を参照して説明する。図３は、実施の形態にかかる空気調和機の室内機における受電方式判定フローの一例を示す図である。 <Operation>
In the example shown in FIG. 1 and FIG. 2, the configuration example that can handle both the indoor unit power reception method and the outdoor unit power reception method by the same indoor unit side control board 3 has been described. Here, the power receiving method determination procedure in the indoor unit of the air conditioner according to the embodiment will be described with reference to FIGS. FIG. 3 is a diagram illustrating an example of a power reception method determination flow in the indoor unit of the air conditioner according to the embodiment.

室内機１の室内機側制御基板３への電力受電が開始されると（ステップＳＴ１０１）、室内機側電源制御回路７は、室外機側通信回路１０から室内機側通信回路９への通信が正常に行えたか否かを判定する（ステップＳＴ１０２）。上述したように、この時点ではリレー１１は開放（ＯＦＦ）している。   When power reception to the indoor unit side control board 3 of the indoor unit 1 is started (step ST101), the indoor unit side power supply control circuit 7 performs communication from the outdoor unit side communication circuit 10 to the indoor unit side communication circuit 9. It is determined whether or not it has been successfully performed (step ST102). As described above, at this time, the relay 11 is open (OFF).

なお、室外機側通信回路１０から室内機側通信回路９への通信が正常に行えたか否かを判定する手法としては、例えば、室外機側通信回路１０から予め設定されたフォーマットの信号を室内機側通信回路９が受信したか否かを判定するようにすればよい。この室外機側通信回路１０から室内機側通信回路９への通信が正常に行えたか否かを判定する手法により、本発明が限定されるものではない。   As a method for determining whether or not the communication from the outdoor unit side communication circuit 10 to the indoor unit side communication circuit 9 has been normally performed, for example, a signal in a preset format from the outdoor unit side communication circuit 10 is transmitted to the indoor unit. What is necessary is just to determine whether the machine side communication circuit 9 received. The present invention is not limited by the method for determining whether or not the communication from the outdoor unit side communication circuit 10 to the indoor unit side communication circuit 9 has been normally performed.

室外機側通信回路１０から室内機側通信回路９への通信が正常に行えた場合には（ステップＳＴ１０２；Ｙｅｓ）、室外機受電方式で運用されているものとして（ステップＳＴ１０３）、本受電方式判定フローを終了する。以降、室内機側制御基板３への電力供給が継続し、且つ、室内機１がリセットされるまでの期間は、室外機受電方式で運用されているものとして制御を行う。なお、室外機受電方式で運用されているものとして制御を行う場合には、リレー１１を短絡／開放する制御を行うことはない。   When communication from the outdoor unit side communication circuit 10 to the indoor unit side communication circuit 9 can be normally performed (step ST102; Yes), it is assumed that the outdoor unit power reception method is used (step ST103), and this power reception method. The determination flow ends. Thereafter, during the period until the power supply to the indoor unit side control board 3 is continued and the indoor unit 1 is reset, the control is performed assuming that the outdoor unit power receiving system is used. Note that when the control is performed assuming that the outdoor unit power receiving system is used, the relay 11 is not short-circuited / opened.

室外機側通信回路１０から室内機側通信回路９への通信が正常に行えなかった場合には（ステップＳＴ１０２；Ｎｏ）、室内機側制御基板３への電力供給開始時からの室外機側通信回路１０から室内機側通信回路９への通信が正常に行えなかった回数（通信不成立回数）をカウントし、通信不成立回数が所定回数（ここではｎ回）を超えたか否かを判定する（ステップＳＴ１０４）。通信不成立回数が所定回数（ここではｎ回）を超えていない場合には（ステップＳＴ１０４；Ｎｏ）、ステップＳＴ１０２に戻る。通信不成立回数が所定回数（ここではｎ回）を超えた場合には（ステップＳＴ１０４；Ｙｅｓ）、室内機受電方式で運用されているものとして（ステップＳＴ１０５）、運転待機状態に移行する（ステップＳＴ１０６）。   When communication from the outdoor unit side communication circuit 10 to the indoor unit side communication circuit 9 cannot be performed normally (step ST102; No), the outdoor unit side communication from the start of power supply to the indoor unit side control board 3 is performed. The number of times that communication from the circuit 10 to the indoor unit side communication circuit 9 has not been normally performed (number of times communication is not established) is counted, and it is determined whether or not the number of times communication is not established exceeds a predetermined number (here n times) (step) ST104). When the communication failure count does not exceed the predetermined number (here, n times) (step ST104; No), the process returns to step ST102. When the communication failure count exceeds a predetermined number (here, n times) (step ST104; Yes), it is assumed that the indoor unit power reception system is operated (step ST105), and the operation shifts to a standby state (step ST106). ).

なお、ステップＳＴ１０４では、室内機側制御基板３への電力供給開始時からの通信不成立回数をカウントする手法以外の手法、例えば、室内機側制御基板３への電力供給開始時からの経過時間（通信不成立経過時間）をカウントし、通信不成立経過時間が所定時間（ここではｘ秒）を超えたか否かを判定するようにしてもよい。この場合には、通信不成立経過時間が所定時間（ここではｘ秒）を超えていない場合には（ステップＳＴ１０４；Ｎｏ）、ステップＳＴ１０２に戻り、通信不成立経過時間が所定時間（ここではｘ秒）を超えた場合には（ステップＳＴ１０４；Ｙｅｓ）、室内機受電方式で運用されているものとして（ステップＳＴ１０５）、運転待機状態に移行する（ステップＳＴ１０６）ようにすればよい。あるいは、通信不成立回数および通信不成立経過時間の双方をカウントし、いずれか一方が所定値を超えたか否かを判定し、通信不成立回数あるいは通信不成立経過時間が所定値（ｎ回あるいはｘ秒）を超えていない場合には（ステップＳＴ１０４；Ｎｏ）、ステップＳＴ１０２に戻り、通信不成立回数あるいは通信不成立経過時間が所定値（ｎ回あるいはｘ秒）を超えた場合には（ステップＳＴ１０４；Ｙｅｓ）、室内機受電方式で運用されているものとして（ステップＳＴ１０５）、運転待機状態に移行する（ステップＳＴ１０６）ようにしてもよい。   In step ST104, a method other than the method of counting the number of times communication is not established since the start of power supply to the indoor unit side control board 3, for example, an elapsed time since the start of power supply to the indoor unit side control board 3 ( (Communication failure establishment elapsed time) may be counted to determine whether or not the communication failure establishment elapsed time has exceeded a predetermined time (in this case, x seconds). In this case, when the communication failure establishment elapsed time does not exceed a predetermined time (here, x seconds) (step ST104; No), the process returns to step ST102, and the communication failure establishment elapsed time is a predetermined time (here x seconds). Is exceeded (step ST104; Yes), it may be assumed that the system is operated in the indoor unit power reception system (step ST105) and shift to an operation standby state (step ST106). Alternatively, both the communication failure count and the communication failure success time are counted, and it is determined whether one of them exceeds a predetermined value, and the communication failure count or the communication failure success time is set to a predetermined value (n times or x seconds). If not exceeded (step ST104; No), the process returns to step ST102. If the communication failure count or the communication failure success time exceeds a predetermined value (n times or x seconds) (step ST104; Yes), the room As operating in the power receiving system (step ST105), it may be shifted to the operation standby state (step ST106).

その後、図示しないワイヤレスリモコン等から運転開始信号を受信すると、室内機側電源制御回路７は、リレー１１を短絡（ＯＮ）させる（ステップＳＴ１０７）。これにより、室外機２に電力が供給される。   Thereafter, when an operation start signal is received from a wireless remote controller or the like (not shown), the indoor unit side power supply control circuit 7 short-circuits (ON) the relay 11 (step ST107). Thereby, electric power is supplied to the outdoor unit 2.

続いて、室内機側電源制御回路７は、室内機側通信回路９と室外機側通信回路１０との間で通信が正常に行えたか否かを判定する（ステップＳＴ１０８）。室内機側通信回路９と室外機側通信回路１０との間で通信が正常に行えたか否かを判定する手法としては、例えば、室内機側通信回路９から送信された信号に対する室外機側通信回路１０からの応答信号を室内機側通信回路９が受信したか否かを判定するようにすればよい。この室内機側通信回路９と室外機側通信回路１０との間で通信が正常に行えたか否かを判定する手法により、本発明が限定されるものではない。   Subsequently, the indoor unit side power supply control circuit 7 determines whether or not communication is normally performed between the indoor unit side communication circuit 9 and the outdoor unit side communication circuit 10 (step ST108). As a method for determining whether or not communication is normally performed between the indoor unit side communication circuit 9 and the outdoor unit side communication circuit 10, for example, outdoor unit side communication with respect to a signal transmitted from the indoor unit side communication circuit 9 is possible. What is necessary is just to determine whether the indoor unit side communication circuit 9 received the response signal from the circuit 10. The present invention is not limited by a method for determining whether or not communication is normally performed between the indoor unit side communication circuit 9 and the outdoor unit side communication circuit 10.

室内機側通信回路９と室外機側通信回路１０との間で通信が正常に行えた場合には（ステップＳＴ１０８；Ｙｅｓ）、室内機受電方式における通常制御、例えば、空気調和機の運転を開始する等の制御を行い（ステップＳＴ１０９）、本受電方式判定フローを終了する。   When communication is normally performed between the indoor unit side communication circuit 9 and the outdoor unit side communication circuit 10 (step ST108; Yes), normal control in the indoor unit power reception system, for example, operation of the air conditioner is started. And the like (step ST109), and the power reception method determination flow is terminated.

室内機側通信回路９と室外機側通信回路１０との間で通信が正常に行えなかった場合には（ステップＳＴ１０８；Ｎｏ）、室外機側制御基板４への電力供給開始時からの室内機側通信回路９と室外機側通信回路１０との間で通信が正常に行えなかった回数（通信不成立回数）をカウントし、通信不成立回数が所定回数（ここではｍ回）を超えたか否かを判定する（ステップＳＴ１１０）。通信不成立回数が所定回数（ここではｍ回）を超えていない場合には（ステップＳＴ１１０；Ｎｏ）、ステップＳＴ１０８に戻る。通信不成立回数が所定回数（ここではｍ回）を超えた場合には（ステップＳＴ１１０；Ｙｅｓ）、室内機側電源制御回路７は、通信異常が発生したものとして、リレー１１を開放（ＯＦＦ）させて室外機２への電力供給を停止すると共に、例えば、図示しない表示部への異常表示、もしくは異常音を鳴動させる等の処理を行うことで、通信異常の発生を報知する異常時制御を行い（ステップＳＴ１１１）、本受電方式判定フローを終了する。   When the communication between the indoor unit side communication circuit 9 and the outdoor unit side communication circuit 10 cannot be normally performed (step ST108; No), the indoor unit from the start of power supply to the outdoor unit side control board 4 Counts the number of times communication is not normally performed between the communication circuit 9 on the side and the communication circuit 10 on the outdoor unit (number of times communication is not established), and whether the number of times communication is not established exceeds a predetermined number (here m times). Determination is made (step ST110). If the communication failure count does not exceed the predetermined number (here, m times) (step ST110; No), the process returns to step ST108. When the communication failure count exceeds a predetermined number (here m times) (step ST110; Yes), the indoor unit side power supply control circuit 7 opens (OFF) the relay 11 assuming that a communication abnormality has occurred. In addition to stopping the power supply to the outdoor unit 2, for example, an abnormal time control for notifying the occurrence of a communication abnormality is performed by performing processing such as an abnormal display on a display unit (not shown) or an abnormal sound. (Step ST111), the power reception method determination flow is terminated.

なお、ステップＳＴ１１０では、室外機側制御基板４への電力供給開始時からの通信不成立回数をカウントする手法以外の手法、例えば、室外機側制御基板４への電力供給開始時からの経過時間（通信不成立経過時間）をカウントし、通信不成立経過時間が所定時間（ここではｙ秒）を超えたか否かを判定するようにしてもよい。この場合には、通信不成立経過時間が所定時間（ここではｙ秒）を超えていない場合には（ステップＳＴ１１０；Ｎｏ）、ステップＳＴ１０８に戻り、通信不成立経過時間が所定時間（ここではｙ秒）を超えた場合には（ステップＳＴ１１０；Ｙｅｓ）、通信異常が発生したものとして、リレー１１を開放（ＯＦＦ）させて室外機２への電力供給を停止すると共に、上述したような異常時制御を行う（ステップＳＴ１１１）ようにすればよい。あるいは、通信不成立回数および通信不成立経過時間の双方をカウントし、いずれか一方が所定値を超えたか否かを判定し、通信不成立回数あるいは通信不成立経過時間が所定値（ｍ回あるいはｙ秒）を超えていない場合には（ステップＳＴ１１０；Ｎｏ）、ステップＳＴ１０８に戻り、通信不成立回数あるいは通信不成立経過時間が所定値（ｍ回あるいはｙ秒）を超えた場合には（ステップＳＴ１１０；Ｙｅｓ）、通信異常が発生したものとして、リレー１１を開放（ＯＦＦ）させて室外機２への電力供給を停止すると共に、上述したような異常時制御を行う（ステップＳＴ１１１）ようにしてもよい。   In step ST110, a method other than a method of counting the number of times communication is not established since the start of power supply to the outdoor unit side control board 4, for example, an elapsed time since the start of power supply to the outdoor unit side control board 4 ( (Communication failure establishment elapsed time) may be counted, and it may be determined whether or not the communication failure establishment elapsed time has exceeded a predetermined time (in this case, y seconds). In this case, when the communication failure establishment elapsed time does not exceed the predetermined time (here, y seconds) (step ST110; No), the process returns to step ST108, and the communication failure establishment elapsed time is the predetermined time (here y seconds). (Step ST110; Yes), it is assumed that a communication abnormality has occurred, the relay 11 is opened (OFF), the power supply to the outdoor unit 2 is stopped, and the control at the time of abnormality as described above is performed. This may be performed (step ST111). Alternatively, both the communication failure count and the communication failure success time are counted, and it is determined whether one of them exceeds a predetermined value, and the communication failure count or the communication failure success time is set to a predetermined value (m times or y seconds). If not exceeded (step ST110; No), the process returns to step ST108. If the number of times of communication failure or the elapsed time of communication failure exceeds a predetermined value (m times or y seconds) (step ST110; Yes), communication is performed. As the occurrence of an abnormality, the relay 11 may be opened (OFF) to stop the power supply to the outdoor unit 2 and the abnormal control as described above may be performed (step ST111).

＜効果＞
以上説明したように、本実施の形態の空気調和機によれば、室内機側制御基板への電力受電開始時において、室外機側通信回路から室内機側通信回路への通信が正常に行えたか否かを判定し、室外機側通信回路から室内機側通信回路への通信が正常に行えた場合には、室外機受電方式で運用されているものとして電源制御を行い、室外機側通信回路から室内機側通信回路への通信が正常に行えなかった場合には、室内機受電方式で運用されているものとして電源制御を行うようにしたので、室内受電機種であるか、あるいは室外受電機種であるかを設定するための部品や、製品出荷時、あるいは製品据付時の設定作業を要することなく、製品据付時の状況に応じて、室内機受電方式と室外機受電方式とを自動的に切り替えることができるので、生産時や製品出荷後の管理コストや、部品・部品実装コストの削減が可能となる。 <Effect>
As described above, according to the air conditioner of the present embodiment, was communication from the outdoor unit side communication circuit to the indoor unit side communication circuit normally performed when power reception to the indoor unit side control board was started? If the communication from the outdoor unit side communication circuit to the indoor unit side communication circuit can be performed normally, power control is performed assuming that the outdoor unit power receiving system is used, and the outdoor unit side communication circuit When the communication from the indoor unit to the indoor unit communication circuit cannot be performed normally, the power supply control is performed as if it is operated in the indoor unit power receiving system. The indoor unit power receiving method and the outdoor unit power receiving method are automatically selected according to the situation at the time of product installation, without the need for setting parts at the time of product shipment or product installation. Because you can switch Management costs and the time and products after the shipment production, reduction of parts and component mounting cost can be reduced.

また、同一の室内機側制御基板で室内機受電方式および室外機受電方式の双方に対応可能としたので、室内側制御基板もしくはその制御用ソフトウェアを室内受電機種、室外受電機種毎に各々開発する必要がないため、開発コストの削減、開発期間の短縮を図ることができる。   In addition, the same indoor unit control board can be used for both the indoor unit power reception system and the outdoor unit power reception system, so the indoor side control board or its control software will be developed for each indoor receiver type and each outdoor receiver type. Since it is not necessary, the development cost can be reduced and the development period can be shortened.

なお、上述した実施の形態では、室外機１台に対して室内機が１台接続されるシングル接続構成である場合について説明したが、室外機１台に対して室内機が複数台接続されるマルチ接続構成であっても同様の効果を得ることができることは言うまでもない。   In the above-described embodiment, the case of a single connection configuration in which one indoor unit is connected to one outdoor unit has been described. However, a plurality of indoor units are connected to one outdoor unit. It goes without saying that the same effect can be obtained even in a multi-connection configuration.

また、以上の実施の形態に示した構成は、本発明の構成の一例であり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、一部を省略する等、変更して構成することも可能であることは言うまでもない。   The configurations described in the above embodiments are examples of the configurations of the present invention, and can be combined with other known techniques, and a part of the configurations is omitted without departing from the gist of the present invention. Needless to say, it is possible to change the configuration.

１ 室内機、２ 室外機、３ 室内機側制御基板、４ 室外機側制御基板、５ 室内機側端子台、６ 室外機側端子台、７ 室内機側電源制御回路、８ 室外機側電源制御回路、９ 室内機側通信回路、１０ 室外機側通信回路、１１ 商用電源供給用リレー（リレー）、１２ 商用電源、１３ 電源線、１４ 電源通信共通線、１５ 通信線、２１ Ｓ１端子（第１の端子）、２２ Ｓ２端子（第２の端子）、２３ Ｓ３端子（第３の端子）、２４ Ｌ端子（第４の端子）、２５ Ｎ端子（第５の端子）、２６ Ｌ１端子（第６の端子）、２７ Ｎ１端子（第７の端子）、２８ Ｓ３’端子（第８の端子）、２９ Ｌ２端子（第９の端子）、３０ Ｎ２端子（第１０の端子）。   1 indoor unit, 2 outdoor unit, 3 indoor unit side control board, 4 outdoor unit side control board, 5 indoor unit side terminal block, 6 outdoor unit side terminal block, 7 indoor unit side power control circuit, 8 outdoor unit side power control Circuit, 9 indoor unit side communication circuit, 10 outdoor unit side communication circuit, 11 commercial power supply relay (relay), 12 commercial power source, 13 power line, 14 power communication common line, 15 communication line, 21 S1 terminal (first Terminal), 22 S2 terminal (second terminal), 23 S3 terminal (third terminal), 24 L terminal (fourth terminal), 25 N terminal (fifth terminal), 26 L1 terminal (sixth terminal) Terminal), 27 N1 terminal (seventh terminal), 28 S3 ′ terminal (eighth terminal), 29 L2 terminal (9th terminal), 30 N2 terminal (tenth terminal).

Claims (7)

室内機と室外機を具備し、前記室内機に供給された商用電源を、電源配線を介して前記室外機に供給する室内機受電方式、および、前記室外機に供給された前記商用電源を、電源配線を介して前記室内機に供給する室外機受電方式の双方に対応した空気調和機であって、
前記室内機は、
前記室外機との間で通信線を介して所定の通信を行う通信回路と、
前記通信回路による前記室外機との通信可否に応じて電源制御を行う電源制御回路と、
を備え、
前記電源制御回路は、
電力受電開始時において、前記通信回路による前記室外機との通信が可能である場合には、前記室外機受電方式であるものと判定して電源制御を行い、前記通信回路による前記室外機との通信が不可能である場合には、前記室内機受電方式であるものと判定して電源制御を行うことを特徴とする空気調和機。 An indoor unit and an outdoor unit, and a commercial power source supplied to the indoor unit via a power supply wiring, and a commercial power source supplied to the outdoor unit. An air conditioner that is compatible with both outdoor unit power supply systems that supply power to the indoor unit via power wiring,
The indoor unit is
A communication circuit for performing predetermined communication with the outdoor unit via a communication line;
A power control circuit that performs power control according to whether communication with the outdoor unit is possible or not by the communication circuit;
With
The power supply control circuit
When communication with the outdoor unit through the communication circuit is possible at the start of power reception, the outdoor unit is determined to be in the outdoor unit power reception method, power control is performed, and communication with the outdoor unit through the communication circuit is performed. When communication is impossible, the air conditioner is characterized in that the indoor unit power receiving method is determined and power control is performed. 前記電源制御回路は、電力受電開始時から前記通信回路による通信不成立回数をカウントし、該通信不成立回数が所定回数を超えた場合に、前記室外機との通信が不可能であると判定することを特徴とする請求項１に記載の空気調和機。   The power supply control circuit counts the number of communication failures by the communication circuit from the start of power reception, and determines that communication with the outdoor unit is impossible when the communication failure times exceeds a predetermined number. The air conditioner according to claim 1. 前記電源制御回路は、電力受電開始時から前記通信回路による通信不成立経過時間をカウントし、該通信不成立経過時間が所定時間を超えた場合に、前記室外機との通信が不可能であると判定することを特徴とする請求項１または２に記載の空気調和機。   The power supply control circuit counts the communication failure establishment elapsed time by the communication circuit from the start of power reception, and determines that communication with the outdoor unit is impossible when the communication failure establishment elapsed time exceeds a predetermined time. The air conditioner according to claim 1 or 2, characterized in that: 前記室内機は、
前記室内機受電方式にて運用する際には、前記商用電源が接続され、前記室外機受電方式にて運用する際には、前記室外機を介して前記商用電源が供給される１組の商用電源入力経路と、
前記室内機受電方式にて運用する際に、前記商用電源入力経路に接続された前記商用電源を、リレーを介して前記室外機に供給する１組の商用電源出力経路と、
を備え、
前記電源制御回路は、前記室内機受電方式にて運用する際に、運転待機時において前記リレーを開放し、前記室外機への給電を停止することを特徴とする請求項１〜３の何れか一項に記載の空気調和機。 The indoor unit is
When operating in the indoor unit power receiving system, the commercial power supply is connected, and when operating in the outdoor unit power receiving system, a set of commercial power is supplied through the outdoor unit. Power input path,
A set of commercial power output paths for supplying the commercial power connected to the commercial power input path to the outdoor unit via a relay when operating in the indoor unit power receiving method;
With
4. The power supply control circuit according to claim 1, wherein when operating in the indoor unit power receiving method, the relay opens the relay during operation standby and stops power supply to the outdoor unit. The air conditioner according to one item. 前記電源制御回路は、電力受電開始時において、前記室内機受電方式であるものと判定し、運転開始時において、前記リレーを短絡して前記室外機への給電を開始した後に、前記通信回路による前記室外機との通信が可能である場合には、前記室内機受電方式における通常制御を行い、前記通信回路による前記室外機との通信が不可能である場合には、前記リレーを開放して前記室外機への給電を停止すると共に、通信異常の発生を報知する異常時制御を行うことを特徴とする請求項４に記載の空気調和機。   The power supply control circuit determines that it is the indoor unit power receiving method at the start of power reception, and at the start of operation, after the relay is short-circuited to start power feeding to the outdoor unit, the communication circuit When communication with the outdoor unit is possible, normal control in the indoor unit power receiving method is performed, and when communication with the outdoor unit through the communication circuit is impossible, the relay is opened. 5. The air conditioner according to claim 4, wherein power supply to the outdoor unit is stopped, and abnormality control for notifying occurrence of communication abnormality is performed. 前記電源制御回路は、前記室外機への給電開始時から前記通信回路による通信不成立回数をカウントし、該通信不成立回数が所定回数を超えた場合に、前記室外機との通信が不可能であると判定することを特徴とする請求項５に記載の空気調和機。   The power supply control circuit counts the number of communication failures by the communication circuit from the start of power supply to the outdoor unit, and communication with the outdoor unit is impossible when the communication failure rate exceeds a predetermined number. It determines with these, The air conditioner of Claim 5 characterized by the above-mentioned. 前記電源制御回路は、前記室外機への給電開始時から前記通信回路による通信不成立経過時間をカウントし、該通信不成立経過時間が所定時間を超えた場合に、前記室外機との通信が不可能であると判定することを特徴とする請求項５または６に記載の空気調和機。   The power supply control circuit counts the communication non-established elapsed time from the start of power supply to the outdoor unit, and communication with the outdoor unit is impossible when the communication non-established elapsed time exceeds a predetermined time The air conditioner according to claim 5 or 6, wherein the air conditioner is determined to be.
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