JP3751744B2

JP3751744B2 - Air conditioner

Info

Publication number: JP3751744B2
Application number: JP04079698A
Authority: JP
Inventors: 繁明安井; 佳幹可児; 俊浩柴垣
Original assignee: Rinnai Corp
Current assignee: Rinnai Corp
Priority date: 1998-02-23
Filing date: 1998-02-23
Publication date: 2006-03-01
Anticipated expiration: 2018-02-23
Also published as: JPH11237134A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば冷媒加熱式等の空気調和機に関するものである。
【０００２】
【従来の技術】
従来、冷媒加熱式等の空気調和機として、商用電源が供給される室内ユニットと、該室内ユニットを介して電力の供給を受ける室外ユニットとからなり、室外ユニットで加熱または冷却された冷媒を室内ユニットに備えられた室内熱交換器に送り、同じく室内ユニットに備えられる室内ファンにより供給される室内空気と前記冷媒との間で熱交換を行うことにより、温風または冷風を室内に供給して暖房運転または冷房運転を行うものが知られている。このような空気調和機では、室内ユニット及び室外ユニットのそれぞれが各ユニットに備えられた機器を制御する制御手段を備え、使用者がリモコンから指示する冷暖房の運転切り換え、温度設定等の情報を室内ユニット制御手段で受信して作動するようになっている。
【０００３】
前記空気調和機では、メンテナンスや修理の際の参考に資するために、両ユニットに備えられている機器の異常内容、累積作動時間等の運転履歴、各種制御のための学習値等の運転情報をＥＥＰＲＯＭ等の不揮発性記憶手段に記憶させておくことが行われている。そして、前記室内ユニットと室外ユニットとでは、前記冷媒を加熱または冷却する機器等を備える室外ユニットの方が負荷が大きく、メンテナンスまたは修理の必要性が高いので、前記不揮発性記憶手段は室外ユニットに設けられ、室内ユニットを介して供給される電力により作動する読み書き手段により前記運転情報の読み書きが行われるようになっている。
【０００４】
前記従来の空気調和機では、室内ユニットに商用電源が供給されているときにはいつでも室内ユニットを介して室外ユニットに電力が供給されているので、メンテナンスや修理の際には、前記不揮発性記憶手段の運転情報を前記読み書き手段を介して室外ユニットに備えられた表示装置に表示させたり、前記読み書き手段に検査ユニットを接続し該検査ユニットと通信することにより、前記運転情報を取り出すことができる。
【０００５】
ところで、前記室内ユニットにスイッチング手段を設け、前記室内ユニットの待機中の場合等のように空気調和機の運転停止時には該スイッチング手段を開成することにより、室外ユニットに対する給電を停止することが検討されている。前記スイッチング手段によれば、前記空気調和機の運転停止時には室外ユニットに電力が供給されないので、室外ユニット制御手段で消費される分だけ電力消費を低減することができる。
【０００６】
しかしながら、前記スイッチング手段を設けると、前記空気調和機の運転停止時には、前記室外ユニットに備えられた前記読み書き手段にも電力が供給されず該読み書き手段が作動しないので、メンテナンスや修理の際に前記不揮発性記憶手段から運転情報を読み出すことができないとの不都合がある。
【０００７】
【発明が解決しようとする課題】
本発明は、かかる不都合を解消して、運転停止時にも必要に応じて室内ユニットから室外ユニットに電力を供給することができる空気調和機を提供することを目的とする。
【０００８】
【課題を解決するための手段】
かかる目的を達成するために、本発明の第１の態様の空気調和機は、商用電源が供給される室内ユニットと、該室内ユニットを介して電力の供給を受ける室外ユニットとからなり、該室内ユニットは該商用電源に接続される接続プラグと、該室内ユニットに備えられた機器を制御する室内側制御手段と、空気調和機の運転・停止を指示する運転スイッチとを備え、該室外ユニットは該室内ユニットから電力の供給を受けるために接続手段を介して前記室内ユニットに接続され、機器の運転情報を記憶する不揮発性記憶手段と、該接続手段を介して供給される電力により作動し該不揮発性記憶手段に対して該運転情報の読み書きを行う読み書き手段とを備える空気調和機において、該室内ユニットに、該空気調和機の運転停止時に該室内側制御手段の指示により開成して該室外ユニットに対する給電を停止するスイッチング手段と、該空気調和機の運転停止中に該接続手段を介して該室外ユニットに対する給電を可能にする給電手段と、該給電手段を作動せしめる給電指示手段と、該商用電源の投入を検出する電源投入検出手段とを設け、該給電手段は該室内側制御手段に設けられ、該給電指示手段の指示に従って該スイッチング手段を強制的に閉成する強制給電回路であり、該電源投入検出手段は該商用電源が投入されたことを検出したときに該給電指示手段として作動することを特徴とする。
【０００９】
本発明の空気調和機によれば、通常は、運転停止時には前記室内側制御手段の指示により前記スイッチング手段が開成し、前記室外ユニットに対する給電が停止される。従って、運転停止時における前記室外ユニットでの電力の消費を阻止して、装置全体の消費電力を低減することができる。
【００１０】
一方、この状態では前記読み書き手段が作動せず、前記不揮発性記憶手段に記憶されている運転情報を読み出すことができないので、本発明の空気調和機によれば、前記スイッチング手段と共に前記室内ユニットに前記給電手段及び給電指示手段を設けることにより、前記スイッチング手段が開成されているときでも必要に応じて前記給電指示手段を作動させ、前記給電手段により前記接続手段を通じて前記室外ユニットに対して電力を供給することができるようになっている。
【００１１】
従って、前記スイッチング手段が開成されているときでも、前記接続手段を介して前記室外ユニットに強制的に電力を供給して、前記読み書き手段を作動させ、前記不揮発性記憶手段に記憶されている運転情報を読み出すことができる。
【００１２】
また、前記給電手段を前記室内側制御手段に設けられた前記強制給電回路とすることにより、前記室内側制御手段のプログラムを変更するだけでよく、既存の配線を大きく変更することが無いので装置構成を簡単なものにすることができる。
【００１５】
また、本発明の第１の態様によれば、前記電源投入検出手段を設け、これを前記給電指示手段として利用するので、既存の装置を大きく変更することが無く、装置構成を簡単なものにすることができる。
【００１６】
前記電源投入検出手段としては、例えば、前記室内ユニットに備えられる接続プラグを一旦引き抜いた後、再び差し込んだときの給電を検出して電源の投入と判断するもの等を挙げることができる。このような電源投入検出手段によれば、前記接続プラグを抜き差しするという簡単な操作で確実に前記給電手段を作動させることができる。
【００１７】
さらに、前記給電手段が前記強制給電回路であるときに、本発明の空気調和機は、前記給電手段が前記給電指示手段から指示を受けた後、所定時間後に、前記スイッチング手段を開成することを特徴とする。本発明によれば、前記給電手段が前記給電指示手段の指示を受けたのち所定時間しか作動せず、所定時間経過後は再び前記スイッチング手段を開成する。従って、管理者が前記スイッチング手段を切り忘れた場合にも、前記所定時間経過後は自動的に前記給電指示手段の作動以前の状態に復帰することができる。
【００１８】
また、本発明の第２の態様の空気調和機は、商用電源が供給される室内ユニットと、該室内ユニットを介して電力の供給を受ける室外ユニットとからなり、該室内ユニットは該商用電源に接続される接続プラグと、該室内ユニットに備えられた機器を制御する室内側制御手段と、空気調和機の運転・停止を指示する運転スイッチとを備え、該室外ユニットは該室内ユニットから電力の供給を受けるために接続手段を介して前記室内ユニットに接続され、機器の運転情報を記憶する不揮発性記憶手段と、該接続手段を介して供給される電力により作動し該不揮発性記憶手段に対して該運転情報の読み書きを行う読み書き手段とを備える空気調和機において、該室内ユニットに、該空気調和機の運転停止時に該室内側制御手段の指示により開成して該室外ユニットに対する給電を停止するスイッチング手段と、該空気調和機の運転停止中に該接続手段を介して該室外ユニットに対する給電を可能にする給電手段と、該給電手段を作動せしめる給電指示手段とを設け、前記給電手段は前記室内側制御手段と前記スイッチング手段との間に設けられ、前記給電指示手段の指示に従って該スイッチング手段を強制的に閉成する強制給電回路であって、該給電指示手段は該強制給電回路に設けられ、一旦押圧されると接点の接続を保持し再度押圧されると接点の接続を解除するロックスイッチであることを特徴とする。本発明の第２の態様の空気調和機によれば、前記ロックスイッチを押圧・再押圧するという簡単な操作で確実に前記強制給電回路を作動・停止させることができる。
【００１９】
また、本発明の第３の態様の空気調和機は、商用電源が供給される室内ユニットと、該室内ユニットを介して電力の供給を受ける室外ユニットとからなり、該室内ユニットは該商用電源に接続される接続プラグと、該室内ユニットに備えられた機器を制御する室内側制御手段と、空気調和機の運転・停止を指示する運転スイッチとを備え、該室外ユニットは該室内ユニットから電力の供給を受けるために接続手段を介して前記室内ユニットに接続され、機器の運転情報を記憶する不揮発性記憶手段と、該接続手段を介して供給される電力により作動し該不揮発性記憶手段に対して該運転情報の読み書きを行う読み書き手段とを備える空気調和機において、該室内ユニットに、該空気調和機の運転停止時に該室内側制御手段の指示により開成して該室外ユニットに対する給電を停止するスイッチング手段と、該空気調和機の運転停止中に該接続手段を介して該室外ユニットに対する給電を可能にする給電手段と、該給電手段を作動せしめる給電指示手段とを設け、前記給電手段は前記室内ユニットの内部で前記スイッチング手段を迂回するバイパス回路であって、前記給電指示手段は該バイパス回路に設けられ、一旦押圧されると接点の接続を保持し再度押圧されると接点の接続を解除するロックスイッチであることを特徴とする。本発明の第３の態様の空気調和機によれば、前記バイパス回路を設け、該バイパス回路に前記ロックスイッチを設けたので、該ロックスイッチを押圧・再押圧するという簡単な操作により確実に前記給電手段を作動・停止させ、前記スイッチング手段の開閉に無関係に、前記接続手段を通じて前記室外ユニットに対して電力を供給することができる。
【００２０】
【発明の実施の形態】
次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。図１は本実施形態の冷媒加熱式空気調和機のシステム構成図であり、図２は第１の実施態様を示すブロック図、図３は第２の実施態様を示すブロック図、図４は第３の実施態様を示すブロック図、図５は第４の実施態様を示すブロック図である。
【００２１】
図１を参照して、本実施形態の冷媒加熱式空気調和機は、室内ユニット１と室外ユニット２とからなる。室内ユニット１は、室内熱交換器３、室内熱交換器３に室内空気を供給する室内ファン４、室内ファン４のファンモータ４ａを制御する室内側制御手段５を備えている。室内側制御手段５は、ＣＰＵ、ＲＡＭ、ＲＯＭ等からなるマイクロコンピュータであり、図示しない商用電源に接続される接続プラグ６と、図示しないリモコンの紛失もしくは故障、または試運転の際等に空気調和機の運転・停止を指示する運転スイッチ７を備えている。
【００２２】
室外ユニット２は、冷媒を貯留するアキュムレータ８、アキュムレータ８から供給される冷媒を圧縮する圧縮機９、圧縮機９から供給される冷媒の流路を冷房運転か暖房運転かに応じて変更する四方電磁弁１０、暖房運転時に室内熱交換器３から流出する冷媒を加熱する冷媒加熱器１１、冷媒加熱器１１を加熱するガスバーナ１２、ガスバーナ１２に燃焼用空気を供給する燃焼ファン１３、冷房運転時に圧縮機９から供給される冷媒と室外空気との熱交換を行う室外熱交換器１４、室外熱交換器１４に室外空気を供給する室外ファン１５、室外熱交換器１４から流出する冷媒を噴出させて低温の湿潤蒸気とするキャピラリーチューブ１６、室外側制御手段１７を備えている。尚、１８，１９は冷媒の流通方向を制御する二方電磁弁、２０，２１，２２は冷媒の逆流を阻止する逆止弁であり、ガスバーナ１２に燃料ガスを供給するガス管２３には燃料ガスの供給・停止を制御する電磁弁２４，２５、室外側制御手段１７の指示に従ってガスバーナ１２に供給する燃料ガスの量を制御する比例弁２６が設けられている。
【００２３】
室外側制御手段１７は、ＣＰＵ、ＲＡＭ、ＲＯＭ等からなるマイクロコンピュータであり、室内ユニット１と室外ユニット２とを接続する接続ケーブル２７を介して室内ユニット１から電力の供給を受けると共に、図示しない双方向通信ケーブルにより室内側制御手段５と接続され、相互に情報を交換することができるようになっており、室外側制御手段１７の指示に従って圧縮機９、四方電磁弁１０、ガスバーナ１２、燃焼ファン１３、室外ファン１５のファンモータ１５ａ、二方電磁弁１８，１９、電磁弁２４，２５、比例弁２６を制御するようになっている。また、室外側制御手段１７は、試運転に際して室外ユニット２の運転・停止を指示する試運転スイッチ２８を備えている。
【００２４】
図１示の冷媒加熱式空気調和機で暖房運転を行うときには、冷媒加熱器１１で加熱され気化した冷媒蒸気がアキュムレータ８を介して圧縮機９に送られ、圧縮機９で圧縮されることにより高温高圧の冷媒蒸気となる。該高温高圧の冷媒蒸気は、四方電磁弁１０を介して室内熱交換器３に送られ、室内ファン４の回転駆動により供給される室内空気と熱交換を行う。この結果、前記冷媒との熱交換により加熱された温風が室内に供給されて暖房を行う。一方、前記冷媒は前記熱交換により凝縮されて液化し、室内熱交換器３から流出して、二方電磁弁１８を介して冷媒加熱器１１に戻る。そして、前記冷媒は図１に実線で矢示する流路に従って循環しつつ、前記作動を繰り返す。
【００２５】
また、図１示の冷媒加熱式空気調和機で冷房運転を行うときには、四方電磁弁１０を切り換えて破線で示す流路とし、圧縮機９で圧縮され高温高圧となった冷媒蒸気が、まず、室外熱交換器１４に送られる。室外熱交換器１４では前記高温高圧の冷媒蒸気は、室外ファン１５の回転駆動により供給される室外空気との熱交換により凝縮され、さらに逆止弁２０を経てキャピラリーチューブ１６から噴出することにより低温の湿潤蒸気となる。この冷媒の湿潤蒸気は、室内熱交換器３に送られることにより室内ファン４の回転駆動により供給される室内空気と熱交換を行う。この結果、前記冷媒との熱交換により冷却された冷風が室内に供給されて冷房を行う。一方、前記冷媒は前記熱交換により加熱されて低温低圧の冷媒蒸気となり、四方電磁弁１０、逆止弁２１を経てアキュムレータ８に戻る。そして、前記冷媒は図１に破線で矢示する流路に従って循環しつつ、前記作動を繰り返す。尚、二方電磁弁１９は、暖房運転時に特定条件下、例えば、圧縮機９が停止したときに開くようになっている。
【００２６】
本実施形態は、図１示の冷媒加熱式空気調和機において、図２示のように、室内ユニット１に、該冷媒加熱式空気調和機の運転停止時に室内側制御手段５の指示により開成して、室外ユニット２に対する給電を停止するスイッチング手段としてのパワーリレー３１を設け、さらに前記室外側制御手段１７に、不揮発性記憶手段としてのＥＥＰＲＯＭ３２と、ＥＥＰＲＯＭ３２にデータを読み書きするものであってそれ自体ＣＰＵ、ＲＡＭ、ＲＯＭ等からなるマイクロコンピュータである読み書き手段３３とを設けたものである。尚、３４は読み書き手段３３によりＥＥＰＲＯＭ３２から読み出されたデータを室外ユニット２に表示する表示器である。
【００２７】
図２において、室内ユニット１には接続プラグ６に接続する配線に室内ファン４のファンモータ４ａが接続されて室内側制御手段５により制御されるようになっている。また、室外ユニット２には接続ケーブル２７に接続する配線に圧縮機９及び室外ファン１５のファンモータ１５ａが接続され、それぞれ室外側制御手段１７により制御されるようになっているが、これは煩雑をさけるために圧縮機９及びファンモータ１５ａのみを示したものであり、実際には前述のように、四方電磁弁１０、ガスバーナ１２、燃焼ファン１３、二方電磁弁１８，１９、電磁弁２４，２５、比例弁２６もまた前記配線に接続されて、それぞれ室外側制御手段１７により制御されるようになっている。
【００２８】
前記ＥＥＰＲＯＭ３２は、室内ユニット１及び室外ユニット２に備えられている各機器の異常内容、累積作動時間等の運転履歴、各種制御のための学習値等の運転情報を記憶するものであり、メンテナンスや修理の際には、前記運転情報を表示器３４に表示させ、或いは別途検査ユニットを室外側制御手段１７に接続して前記運転情報を読み出すことができる。しかし、前記冷媒加熱式空気調和機の運転停止時には、パワーリレー３１が開成して室外ユニット２に対する通電が遮断されるため、前記運転情報を読み出すことができない。
【００２９】
そこで本実施形態の第１の態様では、図２示のように、室内側制御手段５の運転スイッチ７に、空気調和機の運転・停止を指示する本来の機能の他に、前記冷媒加熱式空気調和機の運転停止時にパワーリレー３１を閉成して室外ユニット２に対する給電を指示する機能を付与すると共に、室内側制御手段５に運転スイッチ７の指示によりパワーリレー３１を強制的に閉成する強制給電回路３５及び強制給電回路３５の作動以降の経過時間を計時するタイマ３６を設けたものである。本態様では、運転スイッチ７は押圧時間が５秒以内であれば空気調和機の運転・停止を指示する本来の操作、押圧時間が５秒を超えたときには前記室外ユニット２に対する給電を指示する操作となる。
【００３０】
本実施形態の第１の態様によれば、前記冷媒加熱式空気調和機の運転停止時にメンテナンスまたは修理のためにＥＥＰＲＯＭ３２から情報を読み出そうとするときには、まず、作業者が運転スイッチ７を５秒を超える時間押圧する。すると、運転スイッチ７から強制給電回路３５に、室外ユニット２に対して給電を行うよう指示が出され、同時にタイマ３６が作動される。この結果、強制給電回路３５がパワーリレー３１を閉成するので、接続ケーブル２７を介して室外ユニット２に電力が供給され、ＥＥＰＲＯＭ３２から情報を読み出すことが可能になる。
【００３１】
また、タイマ３６は強制給電回路３５の作動、すなわちパワーリレー３１の閉成と同時に作動して、強制給電回路３５の作動以降の経過時間を計時する。そして、強制給電回路３５の作動以降、所定時間を経過すると、強制給電回路３５に指示してパワーリレー３１を開成させる。前記所定時間は、ＥＥＰＲＯＭ３２から情報を読み出すために十分な時間であればよく、過剰に長くする必要はない。
【００３２】
また、タイマ３６により自動的にパワーリレー３１を開成させる代わりに、作業者がＥＥＰＲＯＭ３２から情報を読み出したのち、手動でパワーリレー３１を開成させるようにしてもよい。この場合には、例えば、強制給電回路３５を作動させる場合と同様に、運転スイッチ７にパワーリレー３１の開成を指示する機能を付与する手段等を採用することができる。
【００３３】
次に、本実施形態の第２の態様は、前記第１の態様のように運転スイッチ７に前記冷媒加熱式空気調和機の運転停止時にパワーリレー３１を閉成して室外ユニット２に対する給電を指示する機能を付与する代わりに、図３示のように室内側制御手段５と、室内側制御手段５に電力を供給する整流回路３７との間に、電源投入検出手段３８を介装したものである。電源投入検出手段３８は、接続プラグ６が図示しない商用電源から一旦引き抜かれ、再び該商用電源に差し込まれると、前記整流回路３７に対する通電を検知して電源の投入を検出することができる。
【００３４】
本実施形態の第２の態様によれば、前記冷媒加熱式空気調和機の運転停止時にメンテナンスまたは修理のためにＥＥＰＲＯＭ３２から情報を読み出そうとするときには、まず、作業者が接続プラグ６を図示しない商用電源から一旦引き抜いて、再び差し込む。すると、電源投入検出手段３８が前記のようにして電源の投入を検出し、強制給電回路３５に、室外ユニット２に対して給電を行うよう指示を出すと同時にタイマ３６を作動させる。この結果、第１の態様と同様に強制給電回路３５がパワーリレー３１を閉成し、ＥＥＰＲＯＭ３２から情報を読み出すことが可能になる。
【００３５】
タイマ３６の作動は、前記第１の態様と全く同一であり、強制給電回路３５の作動以降、所定時間を経過すると、強制給電回路３５に指示してパワーリレー３１を開成させる。
【００３６】
次に、本実施形態の第３の態様は、前記第１または第２の態様のように室内側制御手段５内に強制給電回路３５を設ける代わりに、室内側制御手段５とパワーリレー３１との間に強制給電回路３５を設け、これにロックスイッチ３５ａを設けたものである。ロックスイッチ３５ａは、一旦押圧されると接点の接続を保持し再度押圧されると接点の接続を解除するようになっている。尚、強制給電回路３５と室内側制御手段５との間にはトランジスタが介装され、強制給電回路３５の指示と室内側制御手段５の指示とを択一的にパワーリレー３１に伝えるようになっている。
【００３７】
本実施形態の第３の態様によれば、前記冷媒加熱式空気調和機の運転停止時にメンテナンスまたは修理のためにＥＥＰＲＯＭ３２から情報を読み出そうとするときには、まず、作業者がロックスイッチ３５ａを押圧して接点の接続を保持させる。すると、強制給電回路３５が作動して、パワーリレー３１を閉成し、ＥＥＰＲＯＭ３２から情報を読み出すことが可能になる。
【００３８】
次に、ＥＥＰＲＯＭ３２からの情報の読み出しが終了したならば、作業者が再びロックスイッチ３５ａを押圧することにより接点の接続が解除される。この結果、室外ユニット２に対する電力の供給が停止され、室内ユニット１は、ＥＥＰＲＯＭ３２から情報を読み出す以前の状態に復帰する。
【００３９】
次に、本実施形態の第４の態様は、前記第１乃至第３の態様のように前記冷媒加熱式空気調和機の運転停止時に強制給電回路３５によりパワーリレー３１を閉成する代わりに、図５示のように室内ユニット１の内部でパワーリレー３１を迂回するバイパス回路３９を設け、バイパス回路３９にロックスイッチ４０を設けたものである。ロックスイッチ４０は、図４示のロックスイッチ３５ａと同様に一旦押圧されると接点の接続を保持し再度押圧されると接点の接続を解除するようになっている。
【００４０】
本実施形態の第４の態様によれば、前記冷媒加熱式空気調和機の運転停止時にメンテナンスまたは修理のためにＥＥＰＲＯＭ３２から情報を読み出そうとするときには、まず、作業者がロックスイッチ４０を押圧して接点の接続を保持させる。すると、パワーリレー３１の両側がバイパス回路３９により接続され、パワーリレー３１が開成した状態であっても、接続ケーブル２７を介して室外ユニット２に電力が供給され、ＥＥＰＲＯＭ３２から情報を読み出すことが可能になる。
【００４１】
次に、ＥＥＰＲＯＭ３２からの情報の読み出しが終了したならば、作業者が再びロックスイッチ４０を押圧することにより接点の接続が解除され、室外ユニット２に対する電力の供給が停止されて、室内ユニット１は、ＥＥＰＲＯＭ３２から情報を読み出す以前の状態に復帰する。
【図面の簡単な説明】
【図１】本発明に係る冷媒加熱式空気調和機の一例を示すシステム構成図。
【図２】本発明の第１の実施態様を示すブロック図。
【図３】本発明の第２の実施態様を示すブロック図。
【図４】本発明の第３の実施態様を示すブロック図。
【図５】本発明の第４の実施態様を示すブロック図。
【符号の説明】
１…室内ユニット、２…室外ユニット、５…室内側制御手段、６…接続プラグ、７…運転スイッチ（給電指示手段）、２７…接続手段、３１…スイッチング手段、３２…不揮発性記憶手段、３３…読み書き手段、３５…強制給電回路（給電手段）、３９…バイパス回路（給電手段）、３８…電源投入検出手段（給電指示手段）、３５ａ，４０…ロックスイッチ（給電指示手段）。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner such as a refrigerant heating type.
[0002]
[Prior art]
Conventionally, as an air conditioner such as a refrigerant heating type, an indoor unit to which commercial power is supplied and an outdoor unit to which electric power is supplied through the indoor unit, the refrigerant heated or cooled by the outdoor unit is used indoors. The hot air or the cold air is supplied indoors by sending heat to the indoor heat exchanger provided in the unit and exchanging heat between the indoor air supplied by the indoor fan also provided in the indoor unit and the refrigerant. What performs heating operation or cooling operation is known. In such an air conditioner, each of the indoor unit and the outdoor unit is provided with a control means for controlling the equipment provided in each unit, and information such as switching between cooling and heating operations, temperature setting, etc., which is instructed by the user from the remote controller, is stored in the room. The unit control means receives and operates.
[0003]
In the air conditioner, in order to contribute to the reference at the time of maintenance and repair, operation information such as abnormality contents of the devices provided in both units, operation history such as cumulative operation time, learning values for various controls, etc. The data is stored in a nonvolatile storage means such as an EEPROM. And, in the indoor unit and the outdoor unit, the outdoor unit having a device or the like for heating or cooling the refrigerant has a larger load, and the necessity for maintenance or repair is higher. The operation information is read and written by read / write means that is provided and operated by electric power supplied through the indoor unit.
[0004]
In the conventional air conditioner, power is supplied to the outdoor unit via the indoor unit whenever commercial power is supplied to the indoor unit. Therefore, during maintenance and repair, the nonvolatile storage means The operation information can be taken out by displaying the operation information on a display device provided in an outdoor unit via the read / write means, or by connecting an inspection unit to the read / write means and communicating with the inspection unit.
[0005]
By the way, it is considered that the indoor unit is provided with switching means, and that the power supply to the outdoor unit is stopped by opening the switching means when the operation of the air conditioner is stopped, such as when the indoor unit is on standby. ing. According to the switching means, since power is not supplied to the outdoor unit when the operation of the air conditioner is stopped, power consumption can be reduced by the amount consumed by the outdoor unit control means.
[0006]
However, when the switching means is provided, when the operation of the air conditioner is stopped, power is not supplied to the read / write means provided in the outdoor unit, and the read / write means does not operate. There is an inconvenience that the operation information cannot be read from the nonvolatile storage means.
[0007]
[Problems to be solved by the invention]
An object of the present invention is to provide an air conditioner that can eliminate such inconvenience and can supply electric power from an indoor unit to an outdoor unit as needed even when operation is stopped.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, an air conditioner according to a first aspect of the present invention includes an indoor unit to which commercial power is supplied and an outdoor unit that is supplied with electric power through the indoor unit. The unit includes a connection plug connected to the commercial power source, indoor control means for controlling equipment provided in the indoor unit, and an operation switch for instructing operation / stop of the air conditioner. In order to receive the supply of power from the indoor unit, the storage unit is connected to the indoor unit via connection means, and is operated by the electric power supplied via the connection means and the nonvolatile storage means for storing the operation information of the device. In the air conditioner provided with a read / write means for reading / writing the operation information from / to the nonvolatile storage means, the indoor unit controls the indoor unit when the operation of the air conditioner is stopped. Switching means that opens according to the instruction of the stage and stops power supply to the outdoor unit, power supply means that enables power supply to the outdoor unit via the connection means when the operation of the air conditioner is stopped, and the power supply means A power supply instructing means for operating the power supply and a power-on detection means for detecting the on-off of the commercial power supply. The power supply means is provided in the indoor side control means, and the switching means is forcibly provided according to the instruction of the power supply instruction means. The power supply detection means operates as the power supply instruction means when it is detected that the commercial power supply is turned on.
[0009]
According to the air conditioner of the present invention, normally, when the operation is stopped, the switching unit is opened by an instruction from the indoor side control unit, and power supply to the outdoor unit is stopped. Accordingly, it is possible to prevent power consumption in the outdoor unit when the operation is stopped, and to reduce power consumption of the entire apparatus.
[0010]
On the other hand, in this state, the read / write means does not operate, and the operation information stored in the nonvolatile storage means cannot be read out. Therefore, according to the air conditioner of the present invention, the indoor unit is installed together with the switching means. By providing the power supply means and the power supply instruction means, the power supply instruction means is operated as necessary even when the switching means is opened, and the power supply means supplies power to the outdoor unit through the connection means. It can be supplied.
[0011]
Therefore, even when the switching means is opened, power is forcibly supplied to the outdoor unit via the connection means to operate the read / write means, and the operation stored in the nonvolatile storage means Information can be read out.
[0012]
Further, by setting the forced feeder circuit provided in the indoor side control means the power supply means, it is only necessary to change the program of the indoor side control means, since it is not significantly changing the existing wiring apparatuses The configuration can be simplified.
[0015]
According to the first aspect of the present invention , since the power-on detection means is provided and used as the power supply instruction means, the existing apparatus is not greatly changed, and the apparatus configuration is simplified. can do.
[0016]
As the power-on detection means, for example, one that pulls out a connection plug provided in the indoor unit and then detects power supply when it is reinserted to determine power-on can be cited. According to such a power-on detection means, the power supply means can be reliably operated by a simple operation of inserting and removing the connection plug.
[0017]
Further, when the power supply means is the forced power supply circuit, the air conditioner of the present invention opens the switching means after a predetermined time after the power supply means receives an instruction from the power supply instruction means. Features. According to the present invention, the power supply means operates only for a predetermined time after receiving the instruction from the power supply instruction means, and the switching means is opened again after the predetermined time has elapsed. Therefore, even if the administrator forgets to turn off the switching means, the state before the operation of the power supply instruction means can be automatically restored after the predetermined time has elapsed.
[0018]
The second aspect of the air conditioner of the present invention, the indoor unit is commercial power is supplied, consists an outdoor unit supplied with power via the indoor unit, the indoor unit is the power supply quotient A connection plug to be connected; indoor control means for controlling equipment provided in the indoor unit; and an operation switch for instructing operation / stop of the air conditioner. The outdoor unit receives power from the indoor unit. Non-volatile storage means connected to the indoor unit via connection means for receiving supply, and storing operation information of the device, and operated by electric power supplied via the connection means to the non-volatile storage means In the air conditioner having a reading / writing means for reading and writing the operation information, the indoor unit is opened by an instruction of the indoor side control means when the operation of the air conditioner is stopped. Switching means for stopping power supply to the outdoor unit, power supply means for enabling power supply to the outdoor unit via the connection means during operation stop of the air conditioner, and power supply instruction means for operating the power supply means And the power supply means is provided between the indoor control means and the switching means, and forcibly closes the switching means in accordance with an instruction of the power supply instruction means, wherein the power supply instruction The means is a lock switch provided in the forcible power supply circuit, which holds the connection of the contact when pressed once and releases the connection of the contact when pressed again. According to the air conditioner of the second aspect of the present invention, the forced power feeding circuit can be reliably activated / stopped by a simple operation of pressing / repressing the lock switch.
[0019]
The third aspect of the air conditioner of the present invention, the indoor unit is commercial power is supplied, consists an outdoor unit supplied with power via the indoor unit, the indoor unit is the power supply quotient A connection plug to be connected; indoor control means for controlling equipment provided in the indoor unit; and an operation switch for instructing operation / stop of the air conditioner. The outdoor unit receives power from the indoor unit. Non-volatile storage means connected to the indoor unit via connection means for receiving supply, and storing operation information of the device, and operated by electric power supplied via the connection means to the non-volatile storage means In the air conditioner having a reading / writing means for reading and writing the operation information, the indoor unit is opened by an instruction of the indoor side control means when the operation of the air conditioner is stopped. Switching means for stopping power supply to the outdoor unit, power supply means for enabling power supply to the outdoor unit via the connection means during operation stop of the air conditioner, and power supply instruction means for operating the power supply means The power supply means is a bypass circuit that bypasses the switching means inside the indoor unit, and the power supply instruction means is provided in the bypass circuit, and once pressed, maintains the connection of the contacts and presses again. Once you being a lock switch for releasing the contacts of the connection. According to the air conditioner of the third aspect of the present invention, the bypass circuit is provided, and the lock switch is provided in the bypass circuit. Therefore, the air conditioner can be reliably operated by a simple operation of pressing and repressing the lock switch. The power supply means is activated and stopped, and power can be supplied to the outdoor unit through the connection means regardless of whether the switching means is opened or closed.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a system configuration diagram of a refrigerant heating air conditioner of the present embodiment, FIG. 2 is a block diagram showing a first embodiment, FIG. 3 is a block diagram showing a second embodiment, and FIG. FIG. 5 is a block diagram showing a fourth embodiment. FIG. 5 is a block diagram showing a fourth embodiment.
[0021]
With reference to FIG. 1, the refrigerant heating air conditioner of the present embodiment includes an indoor unit 1 and an outdoor unit 2. The indoor unit 1 includes an indoor heat exchanger 3, an indoor fan 4 that supplies indoor air to the indoor heat exchanger 3, and an indoor control unit 5 that controls a fan motor 4 a of the indoor fan 4. The indoor side control means 5 is a microcomputer composed of a CPU, RAM, ROM, etc., and a connection plug 6 connected to a commercial power source (not shown) and an air conditioner when a remote control (not shown) is lost or broken, or during a trial run. Is provided with an operation switch 7 for instructing operation / stop.
[0022]
The outdoor unit 2 changes the accumulator 8 that stores the refrigerant, the compressor 9 that compresses the refrigerant supplied from the accumulator 8, and the flow path of the refrigerant supplied from the compressor 9 according to whether the operation is cooling or heating. Solenoid valve 10, refrigerant heater 11 for heating refrigerant flowing out from the indoor heat exchanger 3 during heating operation, gas burner 12 for heating the refrigerant heater 11, combustion fan 13 for supplying combustion air to the gas burner 12, and during cooling operation The outdoor heat exchanger 14 that performs heat exchange between the refrigerant supplied from the compressor 9 and the outdoor air, the outdoor fan 15 that supplies outdoor air to the outdoor heat exchanger 14, and the refrigerant that flows out of the outdoor heat exchanger 14 are ejected. And a capillary tube 16 for generating low-temperature wet steam and an outdoor-side control means 17. Reference numerals 18 and 19 are two-way solenoid valves for controlling the flow direction of the refrigerant, and 20, 21 and 22 are check valves for preventing the reverse flow of the refrigerant. The gas pipe 23 for supplying the fuel gas to the gas burner 12 is provided with fuel. Solenoid valves 24 and 25 for controlling the supply / stop of gas and a proportional valve 26 for controlling the amount of fuel gas supplied to the gas burner 12 in accordance with instructions from the outdoor control means 17 are provided.
[0023]
The outdoor control means 17 is a microcomputer composed of a CPU, a RAM, a ROM, and the like, and is supplied with electric power from the indoor unit 1 via a connection cable 27 that connects the indoor unit 1 and the outdoor unit 2 and is not shown. It is connected to the indoor side control means 5 through a bidirectional communication cable so that information can be exchanged between them. The compressor 9, the four-way solenoid valve 10, the gas burner 12, the combustion according to the instructions of the outdoor side control means 17 The fan 13, the fan motor 15 a of the outdoor fan 15, the two-way solenoid valves 18 and 19, the solenoid valves 24 and 25, and the proportional valve 26 are controlled. Further, the outdoor side control means 17 includes a trial operation switch 28 for instructing operation / stop of the outdoor unit 2 during the trial operation.
[0024]
When the heating operation is performed by the refrigerant heating air conditioner shown in FIG. 1, the refrigerant vapor heated and vaporized by the refrigerant heater 11 is sent to the compressor 9 through the accumulator 8 and compressed by the compressor 9. It becomes high-temperature and high-pressure refrigerant vapor. The high-temperature and high-pressure refrigerant vapor is sent to the indoor heat exchanger 3 through the four-way electromagnetic valve 10 and exchanges heat with indoor air supplied by the rotational drive of the indoor fan 4. As a result, warm air heated by heat exchange with the refrigerant is supplied into the room to perform heating. On the other hand, the refrigerant is condensed and liquefied by the heat exchange, flows out of the indoor heat exchanger 3, and returns to the refrigerant heater 11 through the two-way electromagnetic valve 18. And the said operation | movement is repeated, circulating the said refrigerant | coolant according to the flow path shown by the solid line in FIG.
[0025]
Further, when performing the cooling operation with the refrigerant heating air conditioner shown in FIG. 1, the four-way solenoid valve 10 is switched to form a flow path indicated by a broken line, and the refrigerant vapor compressed by the compressor 9 to high temperature and high pressure It is sent to the outdoor heat exchanger 14. In the outdoor heat exchanger 14, the high-temperature and high-pressure refrigerant vapor is condensed by heat exchange with the outdoor air supplied by the rotational drive of the outdoor fan 15, and is further ejected from the capillary tube 16 through the check valve 20. Of moist steam. The wet steam of the refrigerant is sent to the indoor heat exchanger 3 to exchange heat with indoor air supplied by the rotational drive of the indoor fan 4. As a result, the cool air cooled by the heat exchange with the refrigerant is supplied into the room to perform cooling. On the other hand, the refrigerant is heated by the heat exchange to become low-temperature and low-pressure refrigerant vapor, and returns to the accumulator 8 through the four-way solenoid valve 10 and the check valve 21. And the said operation | movement is repeated, circulating the said refrigerant | coolant according to the flow path shown by the broken line in FIG. The two-way solenoid valve 19 is configured to open under specific conditions, for example, when the compressor 9 is stopped during heating operation.
[0026]
In the refrigerant heating air conditioner shown in FIG. 1, the present embodiment opens the indoor unit 1 in accordance with an instruction from the indoor side control means 5 when the operation of the refrigerant heating air conditioner is stopped, as shown in FIG. 2. In addition, a power relay 31 is provided as switching means for stopping power supply to the outdoor unit 2, and the outdoor control means 17 further reads / writes data to / from the EEPROM 32 as nonvolatile storage means and the EEPROM 32 itself. A read / write means 33, which is a microcomputer composed of a CPU, RAM, ROM, etc., is provided. Reference numeral 34 denotes a display for displaying the data read from the EEPROM 32 by the read / write means 33 on the outdoor unit 2.
[0027]
In FIG. 2, a fan motor 4 a of the indoor fan 4 is connected to the wiring connected to the connection plug 6 in the indoor unit 1 and is controlled by the indoor side control means 5. In addition, the compressor 9 and the fan motor 15a of the outdoor fan 15 are connected to the wiring connected to the connection cable 27 in the outdoor unit 2, and are controlled by the outdoor control means 17, respectively. In order to avoid this, only the compressor 9 and the fan motor 15a are shown. Actually, as described above, the four-way solenoid valve 10, the gas burner 12, the combustion fan 13, the two-way solenoid valves 18, 19 and the solenoid valve 24 are shown. , 25 and the proportional valve 26 are also connected to the wiring and are controlled by the outdoor-side control means 17, respectively.
[0028]
The EEPROM 32 stores operation information such as an abnormality content of each device provided in the indoor unit 1 and the outdoor unit 2, an operation history such as a cumulative operation time, a learning value for various controls, and the like. At the time of repair, the operation information can be displayed on the display 34, or a separate inspection unit can be connected to the outdoor control means 17 to read the operation information. However, when the operation of the refrigerant heating air conditioner is stopped, the power relay 31 is opened and the energization of the outdoor unit 2 is interrupted, so that the operation information cannot be read out.
[0029]
Therefore, in the first aspect of the present embodiment, as shown in FIG. 2, in addition to the original function of instructing the operation switch 7 of the indoor side control means 5 to start / stop the air conditioner, the refrigerant heating type When the operation of the air conditioner is stopped, the power relay 31 is closed to give a function of instructing the power supply to the outdoor unit 2 and the power relay 31 is forcibly closed to the indoor control means 5 by the operation switch 7. The forced power supply circuit 35 and the timer 36 for measuring the elapsed time after the operation of the forced power supply circuit 35 are provided. In this aspect, the operation switch 7 is an original operation for instructing operation / stop of the air conditioner if the pressing time is within 5 seconds, and an operation for instructing power supply to the outdoor unit 2 when the pressing time exceeds 5 seconds. It becomes.
[0030]
According to the first aspect of the present embodiment, when the information is to be read from the EEPROM 32 for maintenance or repair when the operation of the refrigerant heating air conditioner is stopped, first, the operator sets the operation switch 7 to 5. Press for more than a second. Then, the operation switch 7 instructs the forced power supply circuit 35 to supply power to the outdoor unit 2, and the timer 36 is activated at the same time. As a result, the forced power feeding circuit 35 closes the power relay 31, so that power is supplied to the outdoor unit 2 via the connection cable 27, and information can be read from the EEPROM 32.
[0031]
The timer 36 operates simultaneously with the operation of the forced power supply circuit 35, that is, simultaneously with the closing of the power relay 31, and measures the elapsed time after the operation of the forced power supply circuit 35. When a predetermined time elapses after the operation of the forced power supply circuit 35, the forced power supply circuit 35 is instructed to open the power relay 31. The predetermined time may be a time sufficient for reading information from the EEPROM 32, and need not be excessively long.
[0032]
Instead of automatically opening the power relay 31 by the timer 36, the operator may read the information from the EEPROM 32 and then manually open the power relay 31. In this case, for example, as in the case where the forced power feeding circuit 35 is operated, a means for giving the operation switch 7 a function of instructing the opening of the power relay 31 can be employed.
[0033]
Next, in the second mode of the present embodiment, as in the first mode, the power switch 31 is closed in the operation switch 7 when the operation of the refrigerant heating air conditioner is stopped to supply power to the outdoor unit 2. Instead of providing the instruction function, a power-on detection means 38 is interposed between the indoor side control means 5 and the rectifier circuit 37 for supplying power to the indoor side control means 5 as shown in FIG. It is. The power-on detection means 38 can detect the energization of the rectifier circuit 37 by detecting the energization of the rectifier circuit 37 once the connection plug 6 is pulled out from the commercial power source (not shown) and plugged into the commercial power source again.
[0034]
According to the second aspect of the present embodiment, when reading information from the EEPROM 32 for maintenance or repair when the refrigerant-heated air conditioner is stopped, first, the operator illustrates the connection plug 6. Unplug from the commercial power supply and plug it in again. Then, the power-on detection means 38 detects the power-on as described above, and instructs the forced power supply circuit 35 to supply power to the outdoor unit 2 and simultaneously activates the timer 36. As a result, the forcible power feeding circuit 35 closes the power relay 31 and can read information from the EEPROM 32 as in the first mode.
[0035]
The operation of the timer 36 is exactly the same as that of the first aspect. When a predetermined time has elapsed after the operation of the forced power supply circuit 35, the forced power supply circuit 35 is instructed to open the power relay 31.
[0036]
Next, in the third mode of the present embodiment, instead of providing the forced power supply circuit 35 in the indoor side control unit 5 as in the first or second mode, the indoor side control unit 5, the power relay 31, A forcible power feeding circuit 35 is provided between the two, and a lock switch 35a is provided. The lock switch 35a keeps the contact connection once pressed, and releases the contact connection when pressed again. A transistor is interposed between the forced power supply circuit 35 and the indoor side control means 5 so that the instruction of the forced power supply circuit 35 and the instruction of the indoor side control means 5 are alternatively transmitted to the power relay 31. It has become.
[0037]
According to the third aspect of the present embodiment, when information is to be read from the EEPROM 32 for maintenance or repair when the operation of the refrigerant heating air conditioner is stopped, the operator first presses the lock switch 35a. To maintain the contact connection. Then, the forced power supply circuit 35 is activated, the power relay 31 is closed, and information can be read from the EEPROM 32.
[0038]
Next, when the reading of information from the EEPROM 32 is completed, the contact is released by the operator pressing the lock switch 35a again. As a result, the supply of power to the outdoor unit 2 is stopped, and the indoor unit 1 returns to the state before reading information from the EEPROM 32.
[0039]
Next, in the fourth aspect of the present embodiment, instead of closing the power relay 31 by the forced power supply circuit 35 when the refrigerant heating air conditioner is stopped, as in the first to third aspects, As shown in FIG. 5, a bypass circuit 39 that bypasses the power relay 31 is provided inside the indoor unit 1, and a lock switch 40 is provided in the bypass circuit 39. Similarly to the lock switch 35a shown in FIG. 4, the lock switch 40 holds the contact when it is pressed once, and releases the contact when it is pressed again.
[0040]
According to the fourth aspect of the present embodiment, when information is to be read from the EEPROM 32 for maintenance or repair when the operation of the refrigerant heating air conditioner is stopped, the operator first presses the lock switch 40. To maintain the contact connection. Then, even if both sides of the power relay 31 are connected by the bypass circuit 39 and the power relay 31 is opened, electric power is supplied to the outdoor unit 2 via the connection cable 27 and information can be read from the EEPROM 32. become.
[0041]
Next, when the reading of information from the EEPROM 32 is completed, the operator presses the lock switch 40 again to release the connection of the contacts, the supply of power to the outdoor unit 2 is stopped, and the indoor unit 1 , The state before reading information from the EEPROM 32 is restored.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing an example of a refrigerant heating air conditioner according to the present invention.
FIG. 2 is a block diagram showing a first embodiment of the present invention.
FIG. 3 is a block diagram showing a second embodiment of the present invention.
FIG. 4 is a block diagram showing a third embodiment of the present invention.
FIG. 5 is a block diagram showing a fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Indoor unit, 2 ... Outdoor unit, 5 ... Indoor side control means, 6 ... Connection plug, 7 ... Operation switch (power supply instruction | indication means), 27 ... Connection means, 31 ... Switching means, 32 ... Nonvolatile memory means, 33 ... Read / write means, 35 ... Forced power supply circuit (power supply means), 39 ... Bypass circuit (power supply means), 38 ... Power-on detection means (power supply instruction means), 35a, 40 ... Lock switch (power supply instruction means).

Claims

An indoor unit to which commercial power is supplied and an outdoor unit to which power is supplied via the indoor unit. The indoor unit includes a connection plug connected to the commercial power source, and a device provided in the indoor unit. An indoor control means for controlling the air conditioner and an operation switch for instructing operation / stop of the air conditioner, and the outdoor unit is connected to the indoor unit via connection means for receiving power supply from the indoor unit. An air conditioner comprising: a non-volatile storage means for storing operation information of the device; and a read / write means that operates by power supplied through the connection means and reads / writes the operation information from / to the non-volatile storage means In the machine
Switching means for opening the indoor unit in response to an instruction from the indoor side control means when the operation of the air conditioner is stopped to stop power supply to the outdoor unit, and via the connection means during operation stop of the air conditioner A power supply means for enabling power supply to the outdoor unit, a power supply instruction means for operating the power supply means, and a power-on detection means for detecting the power-on detection,
The power supply means is a forced power supply circuit that is provided in the indoor control means and forcibly closes the switching means in accordance with an instruction from the power supply instruction means. An air conditioner that operates as the power supply instructing means when the air pressure is detected .

It said feeding means, after receiving an instruction from the feeding instruction means, an air conditioner according to claim 1, characterized in that the opening of the switching means after a predetermined time.

An indoor unit to which commercial power is supplied and an outdoor unit to which power is supplied via the indoor unit. The indoor unit includes a connection plug connected to the commercial power source, and a device provided in the indoor unit. An indoor control means for controlling the air conditioner and an operation switch for instructing operation / stop of the air conditioner, and the outdoor unit is connected to the indoor unit via connection means for receiving power supply from the indoor unit. An air conditioner comprising: a non-volatile storage means for storing operation information of the device; and a read / write means that operates by the power supplied via the connection means and reads / writes the operation information from / to the non-volatile storage means In the machine
Switching means for stopping the power supply to the outdoor unit by opening the indoor unit according to an instruction from the indoor side control means when the operation of the air conditioner is stopped, and via the connection means when the operation of the air conditioner is stopped. Power supply means for enabling power supply to the outdoor unit, and power supply instruction means for operating the power supply means,
The power supply means is a forced power supply circuit provided between the indoor side control means and the switching means, and forcibly closing the switching means in accordance with an instruction from the power supply instruction means. air conditioner you wherein a forced feeding circuit provided in a lock switch temporarily to release when pressed when pressed again holds the contacts of the connection contacts of the connection.

An indoor unit to which commercial power is supplied and an outdoor unit to which power is supplied via the indoor unit. The indoor unit includes a connection plug connected to the commercial power source, and a device provided in the indoor unit. An indoor control means for controlling the air conditioner and an operation switch for instructing operation / stop of the air conditioner, and the outdoor unit is connected to the indoor unit via connection means for receiving power supply from the indoor unit. An air conditioner comprising: a non-volatile storage means for storing operation information of the device; and a read / write means that operates by power supplied through the connection means and reads / writes the operation information from / to the non-volatile storage means In the machine
Switching means for opening the indoor unit in response to an instruction from the indoor side control means when the operation of the air conditioner is stopped to stop power supply to the outdoor unit, and via the connection means during operation stop of the air conditioner Power supply means for enabling power supply to the outdoor unit, and power supply instruction means for operating the power supply means,
The power supply means is a bypass circuit that bypasses the switching means inside the indoor unit, and the power supply instruction means is provided in the bypass circuit, and once pressed, maintains contact connection and is pressed again. air conditioner characterized in that it is a lock switch to release the connection of the contact.