JP3855159B2

JP3855159B2 - Incorrect wiring protection device and equipment equipped with erroneous wiring protection device

Info

Publication number: JP3855159B2
Application number: JP2002118073A
Authority: JP
Inventors: 直藤城; 真二足立
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2002-04-19
Filing date: 2002-04-19
Publication date: 2006-12-06
Anticipated expiration: 2022-04-19
Also published as: JP2003319554A

Description

【０００１】
【発明の属する技術分野】
本発明は例えばバス乾燥ファン等の機器、特に電圧の異なる２電源によりそれぞれ駆動されるアクチュエータを備えた機器に関するものである。
【０００２】
【従来の技術】
図７は例えば特開平４−１２７８３５号公報に記載された従来の誤接続保護回路の構成を示す回路図である。
図７において、２１６はトランス２０４の二次側端子２０４ｂの一方側に一端が接続され、所定電圧以上の電圧が印加されると電流が流れる電圧検出手段である定電圧ダイオードである。この定電圧ダイオード２１６の定電圧VzはAC100V電源が印加されたときにトランス２０４の二次側端子に現れた電圧Eに対して(√２)Ｅを越え、２(√２)Ｅ未満に電圧設定してある。
２１７は定電圧ダイオード２１６のアノードにアノードが接続されたダイオード、２１８はこのダイオード２１７を介して定電圧ダイオード２１６のアノードとトランス２０４の二次側端子２０４ｂの他端との間に接続され、定電圧ダイオード２１６からの電流を検出する電流検出手段である。
【０００３】
この電流検出手段２１８はフォトカプラによって構成され、フォトカプラを構成するダイオード２１８ａがダイオード２１７のカソードとトランス２０４の二次側端子２０４ｂの他端との間に接続され、フォトカプラを構成するトランジスタ２１８ｂがマイクロコンピュータ２０９の出力端と接地との間に接続されている。
２１９は電流検出手段２１８が電流を検出すると点灯する警報手段である発光ダイオードである。この発光ダイオード２１９のアノードが整流手段２０５の一方の直流端子に接続されると共にカソードがドライバ２２０を介してマイクロコンピュータ２０９の出力端に接続され、フォトカプラのトランジスタ２１８ｂのコレクタにも接続されているものである。
【０００４】
次に、従来の２電源の誤接続保護回路の動作について説明する。
まず、１００Ｖの商用電源が端子２０１ａ、２０１ｂに印加されると、トランス２０４の二次側端子２０４ｂには電圧Ｅが現れ、その波高値は(√２)であるから電圧検出手段である定電圧ダイオード２１６の定電圧値Vzより低く、定電圧ダイオード２１６には電流が流れず、電流検出手段２１８のダイオード２１８ａにも電流が流れず、トランジスタ２１８ｂはオフ状態である。その結果、警報手段である発光ダイオード２１９に電流が流れず、発光ダイオード２１９は消灯したままである。
【０００５】
また、施工者が誤って、２００Ｖ商用電源を電源端子２０１ａ，２０１ｂに印加してしまった場合は、トランス２０４の二次側端子２０４ｂ間には電圧２Ｅ、波高値２(√２)Ｅが現れる。そうすると、定電圧ダイオード２１６のカソードには定電圧Vz以上の電圧が印加されることになり、定電圧ダイオード２１６に電流が流れ、電流検出手段２１８のダイオード２１８ａにも電流が流れ、そのトランジスタ２１８ｂがオンする。それによって、警報手段である発光ダイオード２１９に電流が流れて発光することになる。
従って、施工者は電源端子２０１ａ，２０１ｂに２００Ｖ商用電源が誤って接続されたことを知ることができる。
また、この場合には機器の運転はマイクロコンピュータ２０９が開始しないようにしているので、機器損傷は生じない。
【０００６】
上記のような従来の誤接続保護回路は、機器の電源が１電源の時の誤配線対策を行うもので、本来はAC100V電源が印加されるべきところに、誤ってAC200V電源が接続されてしまう誤配線の対策を講じたものである。
しかしながら、トランス２０４については、２次側の電圧がAC100V入力時とAC200V入力時では２倍になるとして回路の構成を組んでおり、本質的にAC100V用に設計されたトランスは、一般的に入力130VAC位から、トランス２０４のコアが磁気飽和を起こし、それ以上の電圧を印加した場合に１次側の巻き線に過大電流が流れ、内部発熱し、巻き線の断線に至るという現象が発生する。
そこで、AC200Vでもトランス２０４が発熱せず機能を維持できるようにするためには、本来AC100Vの入力であるにも拘わらずAC200V用のトランスとして設計されなければならず、初期工事の保護のためだけにコアサイズを大きくするのは、コスト的にデメリットが大きいという問題点があった。
【０００７】
また、近年、家電機器の高容量化に伴い、AC200Vで動作する機器が増えてきている。今までは機器本体の電源が100VAC仕様であったバス乾燥ファンなどもヒータの高容量化に伴い本体電源がAC200V化に移行しつつある。
このバス乾燥ファンは、ヒータと循環ファンは本体内蔵で、換気用のファンを市販の換気扇とで組み合わせて製作される例が多く、汎用換気扇は従来どおりAC100V仕様のものが一般的で、据付時の配線工事に伴い、AC100VとAC200Vとが混在することになり、そのためのトラブルが想定される。
そこで、同一機器に２つの異なる電源を接続する場合、初期工事時に誤って AC100VとAC200V の電源を互い違いに配線したときに、その誤配線に気付き、誤配線による機器の損傷を防止することが要請される。
【０００８】
【発明が解決しようとする課題】
本発明はかかる問題点を解決するためになされたもので、同一機器に２つの異なる電源を接続する場合、初期工事時に誤ってAC100VとAC200Vの電源を互い違いに配線したときの誤配線に気付き、機器の損傷を防止することができる誤配線保護装置及び誤配線保護装置を搭載した機器を得ることを目的とする。
【０００９】
【課題を解決するための手段】
本発明に係る請求項１の誤配線保護装置は、高い電圧の電源が接続される高圧用端子台と、高圧用端子台に接続され、交流を直流電圧に変換して出力する電源回路と、低い電圧の電源が接続される低圧用端子台と、高圧用端子台に常開の第１のスイッチ手段を介して接続される第１のアクチュエータと、第２のアクチュエータが接続される端子台と、該端子台と低圧用端子台との間に設けられた常開の第２のスイッチ手段と、電源回路から受電し、第１及び第２のスイッチ手段を開閉制御する制御回路とを備えた機器に用いられる誤配線保護装置であって、前記低圧用端子台に接続され、高い電圧だけを検知したときに検知信号を出力する電圧判定回路と、前記第２のアクチュエータが接続される端子台に接続され、電圧を検知したときに電源接続信号を出力する電源接続判定回路を備え、前記電圧判定回路からの検知信号を受けてすくなくとも前記第２のスイッチ手段の開放を維持させ、該電圧判定回路からの検知信号を受けないときは、前記電源接続判定回路からの電源接続信号を受けて前記第２のスイッチ手段の開放を維持させ、前記電源接続信号を受けないときは前記第１及び第２のスイッチ手段を閉成させる前記制御回路とからなるものである。
【００１０】
本発明に係る請求項２の誤配線保護装置は、前記電圧判定回路が低電圧用端子台に直列接続された電圧分圧するすくなくとも２つの抵抗と、分圧電圧が発生した抵抗の両端に並列接続された定電圧ダイオード及び電流検知素子の直列回路とからなるものである。
【００１１】
本発明に係る請求項３の誤配線保護装置は、前記電源接続判定回路が、前記第２のアクチュエータが接続される端子台に直列接続された抵抗と電流検知素子とからなるものである。
【００１２】
本発明に係る請求項４の誤配線保護装置は、高い電圧の電源が接続される高圧用端子台と、高圧用端子台に接続され、交流を直流電圧に変換して出力する電源回路と、低い電圧の電源が接続される低圧用端子台と、高圧用端子台に常開の第１のスイッチ手段を介して接続される第１のアクチュエータと、第２のアクチュエータが接続される端子台と、該端子台と低圧用端子台との間に設けられた常開の第２のスイッチ手段と、電源回路から受電し、第１及び第２のスイッチ手段を開閉制御する制御回路とを備えた機器に用いられる誤配線保護装置であって、前記低圧用端子台に接続され、高い電圧だけを検知したときに検知信号を出力する電圧判定回路と、前記第２のアクチュエータが接続される端子台に接続され、電圧を検知したときに電源接続信号を出力する第１の電源接続判定回路と、前記低圧用端子台に接続され、電圧を検知したときに電源接続信号を出力する第２の電源接続判定回路と、前記電圧判定回路からの検知信号を受けてすくなくとも前記第２のスイッチ手段の開放を維持させ、該電圧判定回路からの検知信号を受けないときは、前記第１の電源接続判定回路から電源接続信号を受けた場合は、すくなくとも前記第２のスイッチ手段の開放を維持させ、前記第１の電源接続判定回路から電源接続信号を受けず、且つ第２の電源接続判定回路から電源接続信号を受けたときに前記第１及び第２のスイッチ手段を閉成させる前記制御回路とからなるものである。
【００１３】
本発明に係る請求項５の誤配線保護装置は、前記機器が表示手段を有し、前記制御回路に運転／停止の指令を出力するリモコンを備え、前記制御回路は前記電圧判定回路からの検知信号を受けて前記第１及び第２のスイッチ手段の開放を維持させると共に前記リモコンの表示手段に誤配線の異常表示を行わせるようにしている。
【００１４】
本発明に係る請求項６の誤配線保護装置は、前記機器が表示手段を有し、前記制御回路に運転／停止の指令を出力するリモコンを備え、前記制御回路は前記電源接続判定回路からの電源接続信号を受けてすくなくとも前記第２のスイッチ手段の開放を維持させると共に前記リモコンの表示手段に誤配線の異常表示を行わせるようにしている。
【００１５】
本発明に係る請求項７の誤配線保護装置は、前記機器が表示手段を有し、前記制御回路に運転／停止の指令を出力するリモコンを備え、前記制御回路は前記第１の電源接続判定回路から電源接続信号を受け、且つ第２の電源接続判定回路から電源接続信号を受けなかったときにすくなくとも前記第２のスイッチ手段の開放を維持させると共に前記リモコンの表示手段に誤配線の異常表示を行わせるようにしている。
【００１６】
本発明に係る請求項８の誤配線保護装置は、前記第１のアクチュエータがヒータ、前記第２のアクチュエータが換気扇としている。
【００１７】
本発明に係る請求項９の誤配線保護装置を搭載した機器は、バス乾燥ファンとしている。
【００１９】
【発明の実施の形態】
実施の形態１．
図１は本発明の実施の形態１のバス乾燥ファンに係る正常配線の回路図、図２は同バス乾燥ファンに係る誤配線パターン１の回路図、図３は同バス乾燥ファンに係る誤配線パターン２の回路図、図４は同バス乾燥ファンの動作を示すフローチャートである。
図において、１は電圧の異なる２電源を用いる家電機器であるバス乾燥ファンのバス乾燥ファン本体、２はバス乾燥ファン本体１を操作するためのリモコンで、その駆動源はバス乾燥ファン本体１から給電されるものとする。３はAC200V用電源、４はAC100V用電源、５はバス乾燥ファン本体１の外部に設置するAC100V用の換気扇である。
６はAC200V用電源３がブレーカ１７を介して接続されるAC200V接続用端子台、７はAC100V用電源４がブレーカ１を介して接続されるAC100V接続用端子台、８はAC100V用の換気扇５が接続される換気扇接続用端子台、９はバス乾燥ファン本体１内に設けられた循環ファン、１０はバス乾燥ファン本体１内に設けられたヒータである。
【００２０】
１１はAC200V接続用の端子台６と一対の接続線１２を介して接続され、交流を直流に変化して出力する電源回路で、端子台６に接続される電源がAC100VでもAC200Vでも後述の制御回路が動作する所定の電圧が得られるものとしている。１１ａは電源回路１１内のスイッチングトランス、１３は電源回路１１から直流電源が供給される制御回路である。
１４ａは制御回路１３によって制御される換気扇５への通電のオン・オフ制御を行う換気扇用リレーの操作コイル。１４ｂは換気扇用リレーの常開のツイン接点で、その一方の端子はAC100V接続用端子台７に接続され、他方の端子は換気扇接続用端子台８に接続されている。
【００２１】
１５ａは制御回路１３によって制御される循環ファン９への通電のオン・オフ制御を行う循環ファン用リレーの操作コイル、１５ｂは循環ファン用リレーの常開の接点で、循環ファン９と直列でAC200V接続用端子台６に接続されている。
１６ａは制御回路１３によって制御されるヒータ１０への通電のオン・オフ制御を行うヒータ用リレーの操作コイル、１６ｂはヒータ用リレーの常開の接点で、ヒータ１０と直列でAC200V接続用の端子台６に接続されている。
【００２２】
２０はAC100V接続用端子台７に入力側が接続され、AC200V用電源３とAC100V用電源４との判別を行う電圧判定回路、２１は換気扇接続用端子台８に入力側が接続され、電圧の有無を判定する電源接続判定回路、２２は電圧判定回路２０の出力側と制御回路１３とを接続する連絡線、２３は電源接続判定回路２１の出力側と制御回路１３とを接続する連絡線、２４はバス乾燥ファン本体１の制御回路１３とリモコン２とを結ぶ通信線である
【００２３】
電圧判定回路２０は、AC100V接続用端子台７に直列に接続されたダイオード１０１及び抵抗１０２、１０３と、抵抗１０３に並列接続された定電圧ダイオード１０４及び電流検知素子であるフォトカプラ１０５のホトダイオードの直列回路と、電源回路１１に接続されたフォトカプラ１０５のホトトランジスタ及び抵抗１０６の直列回路とで構成されている。
【００２４】
この電圧判定回路２０は、AC100V接続用端子台７にAC100V用電源４が接続されると、AC100V用電源４はダイオード１０１により、半波毎にダイオード１０１、抵抗器１０２、抵抗器１０３に電流が流れ、このとき抵抗器１０２，１０３で分圧される電圧が定電圧ダイオード１０４の定電圧電圧以下のため、定電圧ダイオード１０４に電流は分流されず、フォトカプラ１０５のホトダイオードにも電流が流れないため、フォトカプラ１０５のトランジスタはオフしたままであり、連絡線２２は電源回路１１の出力電圧と同じ電圧値(以下Ｈレベルと説明)を制御回路１３に伝達する。
【００２５】
ところが、AC100V接続用端子台７にAC200V用電源３が誤って接続されると、抵抗器１０２，１０３で分圧される電圧が定電圧ダイオード１０４の定電圧以上になるため、定電圧ダイオード１０４に電流が分流され、フォトカプラ１０５のホトダイオードに電流が流るため、フォトカプラ１０５のトランジスタはオンする。その結果連絡線２２は半波毎にＨレベルと、回路グランドに近い電圧(以下Ｌレベルと説明)が繰り返されるパルス信号となり制御回路１３に伝達する。
【００２６】
電源接続判定回路２１は、換気扇接続用端子台８に直列に接続されたダイオード１０７、抵抗１０８及び電流検知素子であるフォトカプラ１０９のホトダイオードの直列回路と、電源回路１１に接続されたフォトカプラ１０９のホトトランジスタ及び抵抗１１０の直列回路とで構成されている。
この電源接続判定回路２１は、換気扇接続用端子台８に交流の電圧が発生すると半波毎にダイオード１０７、抵抗器１０８、フォトカプラ１０９のホトダイオードに電流が流れるため、フォトカプラ１０９のトランジスタはオンする。その結果、連絡線２３は半波毎にＨレベルとＬレベルが繰り返されるパルス信号となり制御回路１３に伝達する。
【００２７】
次に、本発明の実施の形態１のバス乾燥ファンの動作を図１〜図３及び図４のフローチャートに基づいて説明する。
なお、図２は図１に示す正常な回路図に対して、AC200V用電源３とAC100V用電源４が互い違いに配線された場合の誤配線パターン１を示し、図３は図２とは別の誤配線パターン２であり、換気扇接続用端子台８に対して本来であれば換気扇５だけを接続すべきところで、換気扇５と直列にAC100V接続用端子台７と接続されているAC100V電源４を接続した場合を示す。また、図４のフローチャートは換気扇５の運転動作に限定して記載したもので、リモコン２の操作による換気扇５の停止動作には言及していない。
【００２８】
端子台６と７に電源が接続され、端子台８にAC100V用の換気扇５が接続されてスタートとすると、制御回路１３ではリモコン２から換気扇５の運転指示があるかどうかを待っている。（ステップＳ１）。なお、このとき、運転指示がある前にブレーカ１７とブレーカ１８は既に投入されているものとする。
そして、リモコン２から換気扇５の運転指示があると、制御回路１３では電圧判定回路２０から端子台７にAC200V用電源３が印加されているかどうかの判定を行う（ステップＳ２）。
【００２９】
図１に示すように端子台７に正しくAC100V用電源４が接続されている場合には、電圧判定回路２０はAC200V用電源３が印加されているという判定信号を出力しないので、制御回路１３は端子台７にAC100V用の電源４が接続されていると判断してステップＳ３へ移行する。
また、図２に示すように端子台７にAC200V用電源３が接続されている場合には、電圧判定回路２０はAC200V用電源３が印加されているという判定信号を出力するので、制御回路１３は端子台７にAC200V用電源３が接続されていると判断して後述のステップＳ５へ移行する。
【００３０】
ステップＳ３では換気扇５への通電のオン・オフ制御を行う換気扇用リレーのツイン接点１４ｂが開放の条件（即ち、この条件の開放は換気扇５の運転開始時の開放と、運転開始後にステップＳ４にて換気扇用リレーのツイン接点１４ｂを閉成し、その後誤配線を検知してステップＳ６で換気扇用リレーのツイン接点１４ｂが開放させられている場合の開放であり、リモコン２の操作により運転が停止動作による開放を除く）として、制御回路１３は電源接続判定回路２１からのパルス信号があるかどうかによって端子台８にAC100V用電源４又はAC200V用電源３のいずれかの電源が印加されているかどうか判定する。
【００３１】
運転開始時は、換気扇用リレーのツイン接点１４ｂは開放の状態にあり、端子台８に電源が供給されるよう接続されていない場合は電源接続判定回路２１はパルス信号を出力しないから、制御回路１３は図１に示すように端子台８に換気扇５のみが接続されていると判断してステップＳ４へ移行する。
また、端子台８に電源が供給されるよう接続されている場合は電源接続判定回路２１はパルス信号を出力するから、制御回路１３は図３に示すように端子台８に換気扇５だけでなく、端子台７と接続されているAC100V用電源４が接続されていると判断して後述のステップＳ５へ移行する。
【００３２】
ステップＳ４では、制御回路１３は換気扇用リレーの操作コイル１４ａに通電し、ツイン接点１４ｂを閉成させ、端子台７に接続されたAC100V用電源４をツイン接点１４ｂを中継させて換気扇５へ給電させ、換気扇５の運転を開始させる。
この換気扇５の運転開始と同時に、制御回路１３は必要に応じて循環ファン用リレーの操作コイル１５ａ及びヒータ用リレーの操作コイル１６ａに通電し、接点１５ｂ及び１６ｂを閉成させ、端子台６に接続されたAC200V用電源３を接点１５ｂ及び１６ｂを中継させて循環ファン９及びヒータ１０へ給電させ、循環ファン９及びヒータ１０の運転を開始する。その後、ステップＳ１に戻る。
その後、同様のフロー処理となるが、ステップＳ３の判定においては今度は換気扇用リレーのツイン接点１４ｂが閉成されているため、電源接続判定回路１０からの電源接続信号が発生していてもステップＳ４へ移行する。
【００３３】
前述したように、端子台７にAC200V用電源３が誤って接続されているために電圧判定回路２０がAC200V用電源３が印加されているという判定信号を出力してステップＳ５に移行した場合や、端子台８に換気扇５だけでなく、端子台７と接続されているAC100V用電源４が接続されているために、電源接続判定回路２１が端子台８に電源が接続されているというパルス信号を出力してステップＳ５に移行した場合には、ステップＳ５では制御回路１３は端子台７にAC200V用電源３が接続されている又は端子台８に換気扇５だけでなく、電源が接続されているという誤配線の異常をリモコン２に伝送し、リモコン２は誤配線の異常を表示し、ステップＳ６へ移行する。
【００３４】
ステップＳ６では換気扇用リレ−のツイン接点１４ｂを開放させ、換気扇５の運転を停止させる。ただし、前記フロー上では換気扇用リレーのツイン接点１４ｂを閉成させていないため、ツイン接点１４ｂは開放が継続するだけとなる。その後、ステップＳ１へ戻る。
なお、図１が示す正しい配線で、AC100V接続用端子台７にAC100V用電源４が印加された後にAC200V接続用端子台６にAC200V用電源３が印加されても制御回路１３はAC200V用電源３が印加された後で動作するので、図４に示すフローチャートが動作するタイミングではAC100V用電源４、AC200V用電源３の両方の電源が印加されている、すなわちブレーカ１７とブレーカ１８は既に投入されている条件で動作する。
【００３５】
また、前述した図２に示す誤配線パターン１では、リモコン２の運転指示があった時にブレーカ１７とブレーカ１８は既に投入されているものとして説明したが、端子台６へのブレーカ１７の投入によるAC100V用の電源４の印加後に端子台７へブレーカ１８の投入によるAC200V用電源３が印加される可能性もある。
この場合は、図４における処理フローで、AC200V用電源３のブレーカ１８が投入されないときは換気扇５の運転開始になっても正常配線時のときと同じフローで処理され、ツイン接点１４ｂが閉じても換気扇用端子台８に電圧が発生しない状態となるが、AC200V用電源３が端子台７に入力された時点で、ステップ２において電圧判定回路２０が動作し、ステップ５へ移行する。
また、換気扇５にはステップ６にて換気扇用リレーのツイン接点１４ｂを開放するまでの短時間はAC200V用電源３が印加されることになるが、短時間の印加であれば一般的に換気扇５が故障することはない。
【００３６】
逆に、後からブレーカ１７の投入によりAC100V用電源４がAC200V接続用端子台６に印加された場合は、先にブレーカ１８の投入によりAC100V接続用端子台７に入力されたAC200V用電源３によって制御回路１３が動作しないため換気扇用リレーは動作せず、そのリレーのツイン接点１４ｂが開放のままであり、機器は停止状態であり、機器の損傷は発生しない。
【００３７】
さらに、図３に示す誤配線パターン２においては、リモコン２の運転指示があった時にブレーカ１７とブレーカ１８は既に投入されている場合は、前述のステップＳ３において換気扇５の運転開始前、即ち換気扇用リレーのツイン接点１４ｂが開放時に電源接続判定回路２１が動作し、ステップ５へ移行する。
但し、ブレーカ１７が投入されて端子台６にAC200V用電源３の印加後に、リモコン２から換気扇５の運転指示があり、その後からブレーカ１８が投入されて端子台７にAC100V用電源４が印加された場合は、換気扇用リレーのツイン接点１４ｂが閉成しているため、端子台７のAC100V用の電源４と端子台８のAC100V用電源４とが内部短絡を起こし、機器はその内部短絡により発生する損傷に対する保護が機能しない事態が生じる。
かかる事態に対しては図５及び図６の本発明の実施の形態２で対処している。
【００３８】
以上説明したように、本発明の実施の形態１によれば、AC200V接続用端子台６とAC100V接続用端子台７に、AC200V用電源３とAC100V用電源４が互い違いに誤って接続され、リモコン２から換気扇５の運転指令がある前にブレーカ１７、１８が投入された場合と、リモコン２から換気扇５の運転指令がある前にブレーカ１７が投入され、後からブレーカ１８が投入された場合は、端子台７に接続された電圧判定回路２０が端子台７にAC200V用電源３が接続されたことの判定信号（即ち、２００Ｖ電源入力信号）を制御回路１３に出力し、制御回路１３はリモコン２へ誤配線異常を通信線２４を介してリモコン２に伝送し、リモコン２は誤配線異常を表示すると共に、制御回路１３は端子台７と換気扇５が接続されている換気扇接続用端子台８との間を接続するツイン接点１４ｂを駆動する換気扇用リレーの操作コイル１４ａへ通電をしないようにしてツイン接点１４ｂを開放のままとして換気扇５の運転を停止するようにしたので、機器は停止状態であり、機器の損傷は発生しない。
【００３９】
また、AC200V接続用端子台６とAC100V接続用端子台７に、AC200V用電源３とAC100V用電源４がそれぞれ正しく接続され、換気扇接続用端子台８に換気扇５とAC100V用電源４が誤って接続され、リモコン２から換気扇５の運転指令がある前にブレーカ１７、１８が投入された場合、端子台８に接続された電源接続判定回路２１が端子台８にAC100V用電源４が接続されたことの電源接続信号を制御回路１３に出力し、制御回路１３はリモコン２へ誤配線の異常を通信線２４を介してリモコン２に伝送し、リモコン２は誤配線の異常を表示すると共に、制御回路１３は端子台７と換気扇５が接続されている換気扇接続用端子台８との間を接続するツイン接点１４ｂを駆動する換気扇用リレーの操作コイル１４ａへ通電をしないようにしてツイン接点１４ｂを開放のままとして換気扇５を無通電状態とするようにしたので、機器は停止状態であり、機器の損傷は発生しない。
さらに、電圧判定回路２０は、低電圧用端子台であるAC100V接続用端子台７に直列接続された電圧分圧する２つの抵抗１０２、１０３と、分圧電圧が発生した抵抗１０３の両端に並列接続された定電圧ダイオード１０４及び電流検知素子であるフォトカプラ１０５の直列回路とからなり、トランスを介することなく電圧の判定を供給１次電源の電圧から検知しているので、低コストで信頼性の高い電圧判定回路を得ることができる。
また、電源接続判定回路２１は、換気扇接続用端子台８に直列に接続された抵抗１０８及び電流検知素子であるフォトカプラ１０９とからなり、トランスを介することなく電圧の判定を供給１次電源の電圧から検知しているので、低コストで信頼性の高い電源接続判定回路を得ることができる。
なお、この実施の形態１では、異なる２電源の例としてAC200V用電源３とAC100V用電源４を用いているが、異なる２電源として一方の電源が他方の電源に比べて電圧が高ければよく、電圧値に限定されるものではないことは勿論である。
【００４０】
実施の形態２．
図５は本発明の実施の形態２のバス乾燥ファンに係る誤配線パターンの回路図、図６は同バス乾燥ファンの動作を示すフローチャートである。
図５において、図１〜図３と同じ構成は同一符号を符号を付して重複した構成の説明を省略する。
この実施の形態２では、AC100V用電源４のAC100V接続用端子台７に対して、実施の形態１の電源接続判定回路２０と同じものを接続し、換気扇接続用端子台８側に接続した電源接続判定回路を第１の電源接続判定回路２１ａとし、端子台７側に接続した電源接続判定回路を第２の電源接続判定回路２１ｂとし、それぞれ制御回路１３と接続する結線を２３ａ、２３ｂとしたものである。
なお、図５は図３と同様に換気扇接続用端子台８に対して本来であれば換気扇５だけを接続すべきところで、換気扇５と直列にAC100Vの電源を接続した場合を示す。
【００４１】
次に、本発明の実施の形態２のバス乾燥ファンの動作を図５及び図６のフローチャートに基づいて説明する。
スタートしてから、ステップＳ１からステップＳ３は本発明の実施の形態１と同様であるので、その動作の説明は省略する。
また、以下の動作説明は運転指示がある前にブレーカ１７とブレーカ１８は既に投入されているものとして説明する。
ステップＳ３で、制御回路１３は第１の電源接続判定回路２０ａからのパルス信号があるかどうかによって換気扇用端子台８にAC100V用電源４が印加されているかどうかを判定する。
運転開始時はリレー１４の接点１４ｂは開放の状態にあり、端子台８に電源が供給されるよう接続されていない場合は第１の電源接続判定回路２１ａはパルス信号を出力しないから、制御回路１３は図１に示すように端子台８に換気扇５のみが接続されていると判断してステップＳ７へ移行する。
なお、端子台８に電源が供給されるよう接続されている場合は第１の電源接続判定回路２１ａはパルス信号を出力するから、制御回路１３は図５に示すように端子台８に換気扇５だけでなく、端子台７と接続されているAC100V用電源４が接続されていると判断して後述のステップＳ５へ移行する。
【００４２】
ステップＳ７では、端子台７にAC100V用電源４がブレーカ１８を介して接続されていてステップＳ３でＮＯの判定となった場合に、第２の電源接続判定回路２１ｂはパルス信号を出力するから、図４と同様にステップＳ４に移行する。
ステップＳ４では、制御回路１３は換気扇用リレーの操作コイル１４ａに通電し、ツイン接点１４ｂを閉成させ、端子台７に接続されたAC100V用電源４をツイン接点１４ｂ経由で換気扇５へ給電させ、換気扇５の運転を開始させる。この換気扇５の運転開始と同時に必要に応じて循環ファン９及びヒータ１０の運転も開始する。その後、ステップＳ１に戻る。
【００４３】
運転指示があった時の状態が、ブレーカ１７が閉でブレーカ１８が開の場合はステップＳ３はＮＯの判定となり、ステップＳ７に移行するが、端子台７に接続されている第２の電源接続判定回路２１ｂにおいて端子台７にAC100V用電源４が印加されていないため電源接続信号が発生しない。このため、ステップＳ５へ移行し、制御回路１３はツイン接点１４ｂを開放のままとする。ツイン接点１４ｂはそれ以前に閉成していることがないので機器は保護される。
逆に、ブレーカ１７が開でブレーカ１８が閉の場合、すなわち後からAC200V用電源３が端子台６に印加された場合は、先に端子台７に入力されたAC100V用電源４だけでは制御回路１３が動作しないため、機器は停止状態であり、機器の損傷は発生しない。
【００４４】
以上説明したように、本発明の実施の形態２によれば、AC200V接続用端子台６とAC100V接続用端子台７に、AC200V用電源３とAC100V用電源４がそれぞれ正しく接続され、換気扇接続用端子台８に換気扇５とAC100V用電源４が誤って接続され、端子台６にAC200V用電源３が印加され、それからリモコン２から換気扇５の運転指令があり、さらにAC100V用電源４が後から端子台７に印加された場合、端子台７に接続された第２の電源接続判定回路２１ｂが端子台８にAC100V用電源４が接続されたことの電源接続信号を制御回路１３に出力しないので、制御回路１３はリモコン２へ誤配線の異常を通信線２４を介してリモコン２に伝送し、リモコン２は誤配線の異常を表示すると共に、制御回路１３は端子台７と換気扇５が接続されている換気扇接続用端子台８との間を接続するツイン接点１４ｂを駆動する換気扇用リレーの操作コイル１４ａへ通電をしないようにしてツイン接点１４ｂを開放のままとし、換気扇５を無通電状態とするようにしたので、機器は停止状態であり、機器の損傷は発生しない。
【００４５】
【発明の効果】
以上説明したとおり、本発明によれば、高い電圧の電源が接続される高圧用端子台と、高圧用端子台に接続され、交流を直流電圧に変換して出力する電源回路と、低い電圧の電源が接続される低圧用端子台と、高圧用端子台に常開の第１のスイッチ手段を介して接続される第１のアクチュエータと、第２のアクチュエータが接続される端子台と、該端子台と低圧用端子台との間に設けられた常開の第２のスイッチ手段と、電源回路から受電し、第１及び第２のスイッチ手段を開閉制御する制御回路とを備えた機器において、高圧用端子台と低圧用端子台に高い電圧の電源と低い電圧の電源が互い違いに誤って接続された場合、低圧用端子台に接続された電圧判定回路が低圧用端子台に高い電圧の電源が接続されたことの検知信号を制御回路に出力し、制御回路はすくなくとも第２のスイッチ手段の開放を維持して第２のアクチュエータの動作を停止するようにしたので、第２のアクチュエータは無通電状態であり、機器の損傷は発生せず、また高圧用端子台と低圧用端子台に高い電圧の電源と低い電圧の電源がそれぞれ正しく接続され、第２のアクチュエータに低い電圧の電源が直列に接続された場合には第２のアクチュエータに接続された電源接続判定回路が第２のアクチュエータに低い電圧の電源が接続されたことの電源接続信号を制御回路に出力し、制御回路はすくなくとも第２のスイッチ手段の開放を維持して第２のアクチュエータにを無通電の状態にするようにしたので、機器は停止状態であり、機器の損傷は発生しないという効果がある。
【００４７】
また、別の本発明によれば、高い電圧の電源が接続される高圧用端子台と、高圧用端子台に接続され、交流を直流電圧に変換して出力する電源回路と、低い電圧の電源が接続される低圧用端子台と、高圧用端子台に常開の第１のスイッチ手段を介して接続される第１のアクチュエータと、第２のアクチュエータが接続される端子台と、該端子台と低圧用端子台との間に設けられた常開の第２のスイッチ手段と、電源回路から受電し、第１及び第２のスイッチ手段を開閉制御する制御回路とを備えた機器において、高圧用端子台と低圧用端子台に高い電圧の電源と低い電圧の電源が互い違いに誤って接続された場合、低圧用端子台に接続された電圧判定回路が低圧用端子台に高い電圧の電源が接続されたことの検知信号を制御回路に出力し、制御回路はすくなくとも第２のスイッチ手段の開放を維持して第２のアクチュエータの動作を停止するようにしたので、第２のアクチュエータは無通電状態であり、機器の損傷は発生せず、また高圧用端子台と低圧用端子台に高い電圧の電源と低い電圧の電源がそれぞれ正しく接続され、第２のアクチュエータに低い電圧の電源が直列に接続された場合には、第２のアクチュエータに接続された第１の電源接続判定回路が第２のアクチュエータに低い電圧の電源が直列に接続されたことの電源接続信号を制御回路に出力すると共に低電圧用端子台に接続された第２の電源接続判定回路が低電圧用端子台に低い電圧の電源が接続されたことの電源接続信号を制御回路に出力し、制御回路はすくなくとも第２のスイッチ手段の開放を維持して第２のアクチュエータを無通電の状態にするようにしたので、機器は停止状態であり、機器の損傷は発生しないという効果がある。
また、第２のスイッチ手段の閉成前の開放は制御回路が第１の電源接続判定回路からの電源接続信号を受け、且つ第２の電源接続判定回路からの電源接続信号を受けないことが条件となるため、低い電圧の電源が運転開始後に印加されたとしても、低圧用端子台に接続された低い電圧の電源が短絡になる誤配線から機器を保護することができる。
【００４８】
また、本発明によれば、機器は表示手段を有し、運転／停止の指令を出力するリモコンを備え、制御回路は電圧判定回路からの検知信号を受けて第１及び第２のスイッチ手段の開放を維持させると共に、リモコンの表示手段に誤配線の異常表示を行わせるようにしたいので、施工者に対して、誤配線を早期に伝え、初期工事のリカバリーを迅速に行うことができるという効果がある。
【００４９】
また、本発明によれば、機器は表示手段を有し、運転／停止の指令を出力するリモコンを備え、制御回路は電源接続判定回路からの電源接続信号を受けてすくなくとも第２のスイッチ手段の開放を維持させると共に、リモコンの表示手段に誤配線の異常表示を行わせるようにしたいので、施工者に対して、誤配線を早期に伝え、初期工事のリカバリーを迅速に行うことができるという効果がある。
【００５０】
さらに、本発明によれば、機器は表示手段を有し、運転／停止の指令を出力するリモコンを備え、制御回路は第１の電源接続判定回路からの電源接続信号を受け、且つ第２の電源接続判定回路から電源接続信号を受けなかったときにすくなくとも第２のスイッチ手段の開放を維持させると共に、リモコンの表示手段に誤配線の異常表示を行わせるようにしたいので、施工者に対して、誤配線を早期に伝え、初期工事のリカバリーを迅速に行うことができるという効果がある。
【００５１】
また、本発明によれば、第１のアクチュエータはヒータ、第２のアクチュエータは換気扇であり、機器はバス乾燥ファンとしたものである。
【００５２】
さらに、本発明によれば、誤配線保護装置を搭載した機器はバス乾燥ファンであり、バス乾燥ファン側から外部の換気扇に対して低い電圧の電源を中継して供給する場合に、誤配線により機器に損傷を与えない。
【図面の簡単な説明】
【図１】本発明の実施の形態１のバス乾燥ファンに係る正常配線の回路図である。
【図２】同バス乾燥ファンに係る誤配線パターン１の回路図である。
【図３】同バス乾燥ファンに係る誤配線パターン２の回路図である。
【図４】同バス乾燥ファンの動作を示すフローチャートである。
【図５】本発明の実施の形態２のバス乾燥ファンに係る誤配線パターンの回路図である。
【図６】同バス乾燥ファンの動作を示すフローチャートである。
【図７】従来の誤配線保護回路の構成をを示す回路図である。
【符号の説明】
１バス乾燥ファン本体、２リモコン、３ AC200V用電源、４ AC100V用電源、５ AC100V用の換気扇、６ AC200V接続用端子台、７ AC100V接続用端子台、８換気扇接続用端子台、９循環ファン、１０ヒータ、１１電源回路、１２接続線、１３制御回路、１４ａ換気扇用リレーの操作コイル、１４ｂツイン接点、１５ａ循環ファン用リレーの操作コイル、１５ｂ接点、１６ａヒータ用リレーの操作コイル、１６ｂ接点、２０電圧判定回路、２１電源接続判定回路。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device such as a bus drying fan, and more particularly to a device including actuators driven by two power sources having different voltages.
[0002]
[Prior art]
FIG. 7 is a circuit diagram showing a configuration of a conventional erroneous connection protection circuit described in, for example, Japanese Patent Laid-Open No. 4-127835.
In FIG. 7, reference numeral 216 denotes a constant voltage diode which is a voltage detecting means whose one end is connected to one side of the secondary terminal 204b of the transformer 204 and through which a current flows when a voltage equal to or higher than a predetermined voltage is applied. The constant voltage Vz of the constant voltage diode 216 exceeds (√2) E with respect to the voltage E appearing at the secondary terminal of the transformer 204 when an AC 100 V power supply is applied, and is less than 2 (√2) E. It is set.
A diode 217 has an anode connected to the anode of the constant voltage diode 216, and 218 is connected between the anode of the constant voltage diode 216 and the other end of the secondary terminal 204b of the transformer 204 via the diode 217. Current detection means for detecting a current from the voltage diode 216.
[0003]
This current detection means 218 is constituted by a photocoupler, and a diode 218a constituting the photocoupler is connected between the cathode of the diode 217 and the other end of the secondary side terminal 204b of the transformer 204, and a transistor 218b constituting the photocoupler. Is connected between the output terminal of the microcomputer 209 and the ground.
Reference numeral 219 denotes a light emitting diode which is an alarm means that is turned on when the current detection means 218 detects a current. The anode of the light emitting diode 219 is connected to one DC terminal of the rectifying means 205, and the cathode is connected to the output terminal of the microcomputer 209 via the driver 220, and is also connected to the collector of the photocoupler transistor 218b. Is.
[0004]
Next, the operation of the conventional dual power supply erroneous connection protection circuit will be described.
First, when a commercial power supply of 100 V is applied to the terminals 201a and 201b, a voltage E appears on the secondary side terminal 204b of the transformer 204, and its peak value is (√2). Since the voltage is lower than the constant voltage value Vz of the diode 216, no current flows through the constant voltage diode 216, no current flows through the diode 218a of the current detection means 218, and the transistor 218b is in an off state. As a result, no current flows through the light emitting diode 219 serving as an alarm means, and the light emitting diode 219 remains off.
[0005]
In addition, when the contractor accidentally applies the 200V commercial power supply to the power supply terminals 201a and 201b, a voltage 2E and a peak value 2 (√2) E appear between the secondary terminals 204b of the transformer 204. . Then, a voltage equal to or higher than the constant voltage Vz is applied to the cathode of the constant voltage diode 216, current flows through the constant voltage diode 216, current also flows through the diode 218a of the current detection means 218, and the transistor 218b Turn on. As a result, a current flows through the light emitting diode 219 serving as an alarm means to emit light.
Therefore, the installer can know that the 200V commercial power supply is erroneously connected to the power supply terminals 201a and 201b.
In this case, since the operation of the device is prevented from starting by the microcomputer 209, the device is not damaged.
[0006]
The conventional erroneous connection protection circuit as described above is a countermeasure against miswiring when the power supply of the device is one power supply, and the AC200V power supply is accidentally connected to the place where the AC100V power supply should be applied. This is a countermeasure against incorrect wiring.
However, the transformer 204 has a circuit configuration in which the secondary voltage is doubled when the input voltage is 100V AC and 200V AC. In general, transformers designed for 100V AC are generally input. From around 130VAC, the core of the transformer 204 is magnetically saturated, and when a voltage higher than that is applied, an excessive current flows through the primary winding, generating heat internally, resulting in a break in the winding. .
Therefore, in order to maintain the function without causing the transformer 204 to generate heat even with AC200V, it must be designed as a transformer for AC200V in spite of the AC100V input, and only for the protection of the initial construction. However, increasing the core size has a problem in that it has a large cost disadvantage.
[0007]
In recent years, with the increase in capacity of home appliances, devices operating at 200 VAC have been increasing. Up to now, the power supply of the main body of equipment has been changed to the AC 200V main body power supply as the capacity of the heater has increased due to the increased capacity of the heater.
This bath drying fan has a built-in heater and circulation fan, and is often manufactured by combining a fan for ventilation with a commercially available ventilation fan. With the wiring work, AC100V and AC200V will be mixed, and troubles for that will be assumed.
Therefore, when two different power supplies are connected to the same equipment, it is required to notice the miswiring when the AC100V and AC200V power supplies are mistakenly wired during the initial construction, and to prevent damage to the equipment due to miswiring. Is done.
[0008]
[Problems to be solved by the invention]
The present invention was made to solve such a problem. When two different power sources are connected to the same device, an incorrect wiring is noticed when AC100V and AC200V power sources are mistakenly wired at the time of initial construction. An object of the present invention is to provide an erroneous wiring protection device capable of preventing damage to the device and an apparatus equipped with the erroneous wiring protection device.
[0009]
[Means for Solving the Problems]
  The erroneous wiring protection device according to claim 1 of the present invention includes a high voltage terminal block to which a high voltage power supply is connected, a power supply circuit that is connected to the high voltage terminal block, converts alternating current into a DC voltage, and outputs it. A low voltage terminal block to which a low voltage power source is connected, a first actuator connected to the high voltage terminal block via first normally open switch means, and a terminal block to which the second actuator is connected And a normally open second switch means provided between the terminal block and the low voltage terminal block, and a control circuit for receiving power from the power supply circuit and controlling opening and closing of the first and second switch means. A miswiring protection device used in equipment, connected to the low-voltage terminal block, and a voltage determination circuit that outputs a detection signal when only a high voltage is detected;A power connection determination circuit connected to a terminal block to which the second actuator is connected and outputting a power connection signal when a voltage is detected;When the second switch means is kept open at least upon receiving a detection signal from the voltage determination circuit, and no detection signal is received from the voltage determination circuitReceiving the power connection signal from the power connection determination circuit, maintaining the second switch means open, and closing the first and second switch means when not receiving the power connection signal. Circuit andIt consists of
[0010]
According to a second aspect of the present invention, there is provided the miswiring protection device according to the present invention, wherein the voltage determination circuit is connected in parallel to at least two resistors connected in series to the low voltage terminal block and both ends of the resistor where the divided voltage is generated. And a series circuit of a constant voltage diode and a current detection element.
[0011]
  The miswiring protection device according to claim 3 of the present invention isThe power connection determination circuit includes a resistor and a current detection element connected in series to a terminal block to which the second actuator is connected.
[0012]
  The erroneous wiring protection device according to claim 4 of the present invention isA high-voltage terminal block to which a high-voltage power supply is connected; a power supply circuit connected to the high-voltage terminal block that converts AC to DC voltage and outputs; a low-voltage terminal block to which a low-voltage power supply is connected; Provided between the first actuator connected to the high voltage terminal block via the normally open first switch means, the terminal block connected to the second actuator, and the terminal block and the low voltage terminal block An erroneous wiring protection device for use in a device comprising the normally-switched second switch means and a control circuit that receives power from the power supply circuit and controls opening and closing of the first and second switch means, Connected to the terminal block for connecting to the terminal block to which the second actuator is connected, and a voltage determination circuit for outputting a detection signal when only a high voltage is detected, and a power connection signal when detecting the voltage First power connection judgment time to output A second power connection determination circuit connected to the low voltage terminal block and outputting a power connection signal when a voltage is detected, and at least the second switch means receiving the detection signal from the voltage determination circuit When the detection signal is not received from the voltage determination circuit, the second switch means is maintained at least when the power connection signal is received from the first power connection determination circuit. The control circuit for closing the first and second switch means when receiving no power connection signal from the first power connection determination circuit and receiving a power connection signal from the second power connection determination circuitIt consists of
[0013]
  An erroneous wiring protection device according to claim 5 of the present invention isThe device includes a display unit, and includes a remote controller that outputs an operation / stop command to the control circuit. The control circuit receives a detection signal from the voltage determination circuit and receives the detection signal from the first and second switch units. While maintaining the open state, the display means of the remote controller is made to display an abnormal wiring error.
[0014]
  In the erroneous wiring protection device according to claim 6 of the present invention, the device has a display means.SaidA remote controller that outputs a command for operation / stop to the control circuit;Power connection signal from the power connection determination circuitIn response to this, at least the second switch means is kept open, and the display means of the remote controller is made to display an abnormal wiring error.
[0015]
  In the erroneous wiring protection device according to claim 7 of the present invention, the device has a display means.SaidA remote controller that outputs a command for operation / stop to the control circuit;When a power connection signal is received from the first power connection determination circuit and a power connection signal is not received from the second power connection determination circuitAt least, the second switch means is kept open, and the display means of the remote controller is made to display an abnormal wiring error.
[0016]
  An erroneous wiring protection device according to claim 8 of the present invention isThe first actuator is a heater, and the second actuator is a ventilation fan.is doing.
[0017]
  The erroneous wiring protection device according to claim 9 according to the present invention.The equipment equipped with the bus drying fanIt is said.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
1 is a circuit diagram of normal wiring according to the bus drying fan of Embodiment 1 of the present invention, FIG. 2 is a circuit diagram of an erroneous wiring pattern 1 according to the bus drying fan, and FIG. 3 is an erroneous wiring according to the bus drying fan. FIG. 4 is a flowchart showing the operation of the bus drying fan.
In the figure, reference numeral 1 denotes a bus drying fan main body of a bus drying fan which is a home electric appliance using two power sources having different voltages. Reference numeral 2 denotes a remote controller for operating the bus drying fan main body 1. It shall be powered. 3 is a power supply for AC200V, 4 is a power supply for AC100V, and 5 is a ventilation fan for AC100V installed outside the bus drying fan main body 1.
6 is an AC200V connection terminal block to which an AC200V power supply 3 is connected via a breaker 17, 7 is an AC100V connection terminal block to which an AC100V power supply 4 is connected via a breaker 1, and 8 is an AC100V ventilation fan 5 A ventilation fan connecting terminal block to be connected, 9 is a circulation fan provided in the bath drying fan main body 1, and 10 is a heater provided in the bus drying fan main body 1.
[0020]
Reference numeral 11 denotes a power supply circuit that is connected to a terminal block 6 for AC200V connection via a pair of connection wires 12 and outputs alternating current to direct current. The control described later is performed regardless of whether the power supply connected to the terminal block 6 is AC100V or AC200V. It is assumed that a predetermined voltage for operating the circuit is obtained. 11a is a switching transformer in the power supply circuit 11, and 13 is a control circuit to which DC power is supplied from the power supply circuit 11.
Reference numeral 14 a denotes an operation coil of a ventilating fan relay that performs on / off control of energization to the ventilating fan 5 controlled by the control circuit 13. 14b is a normally open twin contact of the ventilating fan relay, one terminal of which is connected to the AC100V connecting terminal block 7 and the other terminal is connected to the ventilating fan connecting terminal block 8.
[0021]
Reference numeral 15a denotes an operation coil of a circulation fan relay that performs on / off control of energization to the circulation fan 9 controlled by the control circuit 13. Reference numeral 15b denotes a normally open contact of the circulation fan relay. It is connected to the connection terminal block 6.
Reference numeral 16a denotes an operation coil of a heater relay that performs on / off control of energization to the heater 10 controlled by the control circuit 13. Reference numeral 16b denotes a normally open contact of the heater relay, which is a terminal for connecting 200V AC in series with the heater 10. It is connected to the base 6.
[0022]
20 is connected to the AC100V terminal block 7 and the input side is connected to the AC200V power supply 3 and the AC100V power supply 4 to determine the voltage, and 21 is connected to the ventilator fan terminal block 8 and the input side is connected to check the presence or absence of voltage. A power connection determination circuit for determining, 22 is a communication line for connecting the output side of the voltage determination circuit 20 and the control circuit 13, 23 is a communication line for connecting the output side of the power connection determination circuit 21 and the control circuit 13, and 24 is A communication line connecting the control circuit 13 of the bus drying fan main body 1 and the remote controller 2
[0023]
The voltage determination circuit 20 includes a diode 101 and resistors 102 and 103 connected in series to the AC 100 V connection terminal block 7, a constant voltage diode 104 connected in parallel to the resistor 103, and a photodiode of a photocoupler 105 that is a current detection element. It is composed of a series circuit and a series circuit of a phototransistor 105 and a resistor 106 of the photocoupler 105 connected to the power supply circuit 11.
[0024]
In this voltage determination circuit 20, when the AC100V power supply 4 is connected to the AC100V connection terminal block 7, the AC100V power supply 4 causes the current to flow through the diode 101, the resistor 102, and the resistor 103 every half wave. Since the voltage divided by the resistors 102 and 103 at this time is equal to or lower than the constant voltage of the constant voltage diode 104, no current is divided into the constant voltage diode 104 and no current flows through the photodiode of the photocoupler 105. Therefore, the transistor of the photocoupler 105 remains off, and the connection line 22 transmits the same voltage value as the output voltage of the power supply circuit 11 (hereinafter referred to as H level) to the control circuit 13.
[0025]
However, if the AC200V power supply 3 is erroneously connected to the AC100V connection terminal block 7, the voltage divided by the resistors 102 and 103 becomes equal to or higher than the constant voltage of the constant voltage diode 104. Since the current is shunted and the current flows through the photodiode of the photocoupler 105, the transistor of the photocoupler 105 is turned on. As a result, the communication line 22 becomes a pulse signal in which an H level and a voltage close to circuit ground (hereinafter referred to as L level) are repeated every half wave, and is transmitted to the control circuit 13.
[0026]
The power connection determination circuit 21 includes a diode 107 connected in series to the ventilating fan connection terminal block 8, a resistor 108, and a photodiode series of a photocoupler 109 as a current detection element, and a photocoupler 109 connected to the power supply circuit 11. And a series circuit of a resistor 110.
In the power supply connection determination circuit 21, when an AC voltage is generated in the ventilating fan connection terminal block 8, current flows through the photodiode 107, the resistor 108, and the photodiode of the photocoupler 109 every half wave, so that the transistor of the photocoupler 109 is turned on. To do. As a result, the connection line 23 becomes a pulse signal in which the H level and the L level are repeated every half wave and is transmitted to the control circuit 13.
[0027]
Next, the operation of the bus drying fan according to the first embodiment of the present invention will be described with reference to the flowcharts of FIGS.
2 shows a miswiring pattern 1 when the AC 200V power source 3 and the AC 100V power source 4 are alternately wired with respect to the normal circuit diagram shown in FIG. 1, and FIG. 3 is different from FIG. Connected to AC 100V power source 4 connected to AC 100V connection terminal block 7 in series with ventilating fan 5, where wiring pattern 2 is wrong and only ventilation fan 5 should be connected to vent fan connecting terminal block 8 Shows the case. 4 is described only for the operation of the ventilation fan 5, and does not refer to the operation of stopping the ventilation fan 5 by the operation of the remote controller 2.
[0028]
When the power is connected to the terminal blocks 6 and 7 and the AC fan 100V is connected to the terminal block 8, the control circuit 13 waits for an instruction for operating the ventilation fan 5 from the remote controller 2. (Step S1). At this time, it is assumed that the breaker 17 and the breaker 18 are already turned on before the operation instruction is given.
When the operation instruction for the ventilation fan 5 is received from the remote controller 2, the control circuit 13 determines whether or not the AC200V power source 3 is applied to the terminal block 7 from the voltage determination circuit 20 (step S2).
[0029]
As shown in FIG. 1, when the AC 100V power supply 4 is correctly connected to the terminal block 7, the voltage determination circuit 20 does not output a determination signal indicating that the AC 200V power supply 3 is applied. It is determined that the power supply 4 for AC100V is connected to the terminal block 7, and the process proceeds to step S3.
As shown in FIG. 2, when the AC 200V power source 3 is connected to the terminal block 7, the voltage determination circuit 20 outputs a determination signal indicating that the AC 200V power source 3 is applied. Determines that the AC power supply 3 for AC 200V is connected to the terminal block 7, and proceeds to step S5 described later.
[0030]
  In step S3, the twin contact 14b of the ventilating fan relay that performs on / off control of energization to the ventilating fan 5 is opened (that is, the opening of the ventilating fan 5 is started when the ventilating fan 5 starts operating, and after the start of the operation, the process proceeds to step S4). This is an opening when the twin contact 14b of the ventilating fan relay is closed, and then the wrong wiring is detected and the twin contact 14b of the ventilating fan relay is opened in step S6, and the operation is stopped by the operation of the remote controller 2. The control circuit 13 is a power connection determination circuit.21It is determined whether any one of the power supply 4 for AC100V or the power supply 3 for AC200V is applied to the terminal block 8 depending on whether there is a pulse signal from.
[0031]
When the operation is started, the twin contact 14b of the ventilating fan relay is in an open state, and the power connection determination circuit 21 does not output a pulse signal when the terminal block 8 is not connected to supply power. 13 determines that only the ventilation fan 5 is connected to the terminal block 8 as shown in FIG. 1, and proceeds to step S4.
When the terminal block 8 is connected so that power is supplied, the power connection determination circuit 21 outputs a pulse signal, so that the control circuit 13 not only supplies the ventilation fan 5 to the terminal block 8 as shown in FIG. Then, it is determined that the AC 100V power source 4 connected to the terminal block 7 is connected, and the process proceeds to step S5 described later.
[0032]
  In step S4, the control circuit 13 energizes the operation coil 14a of the ventilating fan relay to provide a twin contact.14bThe AC100V power supply 4 connected to the terminal block 7 is twin contact.14bIs relayed to feed power to the ventilating fan 5, and the operation of the ventilating fan 5 is started.
  Simultaneously with the start of the operation of the ventilation fan 5, the control circuit 13 energizes the operation coil 15a of the circulation fan relay and the operation coil 16a of the heater relay as necessary to close the contacts 15b and 16b. Contact the connected AC200V power supply 315bAnd 16b are relayed to supply power to the circulation fan 9 and the heater 10, and the operation of the circulation fan 9 and the heater 10 is started. Then, it returns to step S1.
  Thereafter, the same flow processing is performed, but in the determination in step S3, since the twin contact 14b of the ventilating fan relay is closed this time, even if the power connection signal from the power connection determination circuit 10 is generated, the step is performed. The process proceeds to S4.
[0033]
As described above, when the AC 200V power source 3 is erroneously connected to the terminal block 7, the voltage determination circuit 20 outputs a determination signal indicating that the AC 200V power source 3 is applied and proceeds to step S5. The pulse signal that the power connection determination circuit 21 is connected to the terminal block 8 because the AC power supply 4 for AC 100V connected to the terminal block 7 is connected to the terminal block 8 in addition to the ventilation fan 5. In step S5, the control circuit 13 is connected to the terminal block 7 with the AC 200V power source 3 or to the terminal block 8 with not only the ventilation fan 5 but also the power source. Is transmitted to the remote controller 2, and the remote controller 2 displays the incorrect wiring abnormality and proceeds to step S6.
[0034]
In step S6, the twin contact 14b of the ventilation fan relay is opened, and the operation of the ventilation fan 5 is stopped. However, since the twin contact 14b of the ventilating fan relay is not closed on the flow, the twin contact 14b is only kept open. Then, it returns to step S1.
In addition, even if the AC200V power supply 3 is applied to the AC200V connection terminal block 6 after the AC100V power supply 4 is applied to the AC100V connection terminal block 7 with the correct wiring shown in FIG. 4 is applied, both the AC100V power supply 4 and the AC200V power supply 3 are applied at the timing at which the flowchart shown in FIG. 4 operates. That is, the breaker 17 and the breaker 18 are already turned on. It works under the condition.
[0035]
Further, in the erroneous wiring pattern 1 shown in FIG. 2 described above, it has been described that the breaker 17 and the breaker 18 are already turned on when the operation instruction of the remote controller 2 is given. However, by the insertion of the breaker 17 to the terminal block 6 There is also a possibility that the AC 200 V power source 3 is applied to the terminal block 7 by applying the breaker 18 after the AC 100 V power source 4 is applied.
In this case, in the processing flow in FIG. 4, when the breaker 18 of the AC 200V power supply 3 is not turned on, the processing is performed in the same flow as in normal wiring even when the operation of the ventilation fan 5 is started, and the twin contact 14b is closed. Although no voltage is generated in the ventilation fan terminal block 8, the voltage determination circuit 20 operates in step 2 when the AC200V power source 3 is input to the terminal block 7, and the process proceeds to step 5.
Further, the AC power supply 3 for AC200V is applied to the ventilation fan 5 for a short time until the twin contact 14b of the ventilation fan relay is opened in step 6, but generally the ventilation fan 5 is applied for a short time. Will not fail.
[0036]
On the contrary, when the AC100V power supply 4 is applied to the AC200V connection terminal block 6 by turning on the breaker 17 later, the AC200V power supply 3 previously input to the AC100V connection terminal block 7 by turning on the breaker 18 is used. Since the control circuit 13 does not operate, the ventilation fan relay does not operate, the twin contact 14b of the relay remains open, the device is stopped, and the device is not damaged.
[0037]
Further, in the erroneous wiring pattern 2 shown in FIG. 3, if the breaker 17 and the breaker 18 are already turned on when the remote controller 2 is instructed to operate, before the operation of the ventilation fan 5 is started in step S3, that is, the ventilation fan. When the twin contact 14b of the relay is opened, the power connection determination circuit 21 operates, and the process proceeds to step 5.
However, after the breaker 17 is turned on and the AC power supply 3 is applied to the terminal block 6, the remote controller 2 gives an instruction to operate the ventilation fan 5. After that, the breaker 18 is turned on and the AC power supply 4 is applied to the terminal block 7. In this case, since the twin contact 14b of the ventilating fan relay is closed, the AC 100V power source 4 of the terminal block 7 and the AC 100V power source 4 of the terminal block 8 cause an internal short circuit, and the device is caused by the internal short circuit. A situation occurs where the protection against the damage that occurs is not working.
Such a situation is dealt with in the second embodiment of the present invention shown in FIGS.
[0038]
As described above, according to the first embodiment of the present invention, the AC200V power supply terminal 3 and the AC100V connection terminal block 7 are alternately connected to the AC200V power supply 3 and the AC100V power supply 4 by mistake. When the breakers 17 and 18 are turned on before the operation command for the ventilation fan 5 from 2 is turned on, and when the breaker 17 is turned on before the operation command for the ventilation fan 5 is sent from the remote control 2 and then the breaker 18 is turned on The voltage determination circuit 20 connected to the terminal block 7 outputs a determination signal (that is, a 200V power supply input signal) indicating that the AC block power supply 3 is connected to the terminal block 7 to the control circuit 13, and the control circuit 13 2 is transmitted to the remote controller 2 via the communication line 24, the remote controller 2 displays the erroneous wiring abnormality, and the control circuit 13 is connected to the ventilator fan terminal block 8 to which the terminal block 7 and the ventilator fan 5 are connected. Connect between Since the operation of the ventilation fan 5 is stopped while the twin contact 14b is left open without energizing the operation coil 14a of the ventilation fan relay that drives the twin contact 14b, the device is in a stopped state. No damage will occur.
[0039]
In addition, AC200V power supply 3 and AC100V power supply 4 are correctly connected to AC200V connection terminal block 6 and AC100V connection terminal block 7, respectively. Ventilation fan 5 and AC100V power supply 4 are incorrectly connected to ventilation fan connection terminal block 8. When the breakers 17 and 18 are turned on before the operation command of the ventilation fan 5 is given from the remote controller 2, the power connection determination circuit 21 connected to the terminal block 8 is connected to the terminal block 8 and the AC 100V power supply 4 is connected. Is output to the control circuit 13, and the control circuit 13 transmits an error in the incorrect wiring to the remote control 2 via the communication line 24 to the remote control 2. The remote control 2 displays the error in the incorrect wiring and the control circuit. 13 opens the twin contact 14b so as not to energize the operation coil 14a of the ventilation fan relay that drives the twin contact 14b that connects the terminal block 7 and the ventilation fan connection terminal block 8 to which the ventilation fan 5 is connected. Since the ventilation fan 5 as mom was set as the non-energized state, the device is in a stopped state, equipment damage does not occur.
Further, the voltage determination circuit 20 is connected in parallel to both ends of the two resistors 102 and 103 for dividing the voltage connected in series to the AC100V connection terminal block 7 which is a low voltage terminal block and the resistor 103 where the divided voltage is generated. Since the constant voltage diode 104 and the photocoupler 105, which is a current detection element, are connected in series, the voltage determination is detected from the voltage of the supplied primary power supply without using a transformer. A high voltage determination circuit can be obtained.
The power connection determination circuit 21 includes a resistor 108 connected in series to the ventilating fan connection terminal block 8 and a photocoupler 109 that is a current detection element, and supplies voltage determination without passing through a transformer. Since the detection is performed from the voltage, a low-cost and highly reliable power connection determination circuit can be obtained.
In the first embodiment, the AC 200 V power source 3 and the AC 100 V power source 4 are used as examples of two different power sources, but it is sufficient that one power source has a higher voltage than the other power source as the two different power sources. Of course, the voltage value is not limited.
[0040]
Embodiment 2. FIG.
FIG. 5 is a circuit diagram of an erroneous wiring pattern related to the bus drying fan according to the second embodiment of the present invention, and FIG. 6 is a flowchart showing the operation of the bus drying fan.
5, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals, and the description of the overlapping components is omitted.
In the second embodiment, the same power supply connection determination circuit 20 of the first embodiment is connected to the AC100V connection terminal block 7 of the AC100V power supply 4, and the power supply connected to the ventilating fan connection terminal block 8 side. The connection determination circuit is the first power connection determination circuit 21a, the power connection determination circuit connected to the terminal block 7 side is the second power connection determination circuit 21b, and the connections to the control circuit 13 are 23a and 23b, respectively. Is.
FIG. 5 shows the case where only the ventilation fan 5 should be connected to the ventilation fan connection terminal block 8 as in FIG.
[0041]
Next, the operation of the bus drying fan according to the second embodiment of the present invention will be described with reference to the flowcharts of FIGS.
Since the steps S1 to S3 are the same as those in the first embodiment of the present invention after the start, description of the operation is omitted.
In the following description of the operation, it is assumed that the breaker 17 and the breaker 18 are already turned on before the operation instruction is given.
In step S3, the control circuit 13 determines whether the AC 100V power source 4 is applied to the ventilating fan terminal block 8 depending on whether there is a pulse signal from the first power source connection determination circuit 20a.
At the start of operation, the contact 14b of the relay 14 is in an open state, and the first power connection determination circuit 21a does not output a pulse signal when the terminal block 8 is not connected so that power is supplied. 13 determines that only the ventilation fan 5 is connected to the terminal block 8 as shown in FIG. 1, and proceeds to step S7.
When the terminal block 8 is connected to be supplied with power, the first power connection determination circuit 21a outputs a pulse signal, so that the control circuit 13 is connected to the terminal block 8 with the ventilation fan 5 as shown in FIG. In addition, it is determined that the AC 100V power source 4 connected to the terminal block 7 is connected, and the process proceeds to step S5 described later.
[0042]
In step S7, when the power supply 4 for AC100V is connected to the terminal block 7 via the breaker 18, and the determination in step S3 is NO, the second power connection determination circuit 21b outputs a pulse signal. The process proceeds to step S4 as in FIG.
In step S4, the control circuit 13 energizes the operation coil 14a of the ventilating fan relay, closes the twin contact 14b, feeds the AC100V power source 4 connected to the terminal block 7 to the ventilating fan 5 via the twin contact 14b, The operation of the ventilation fan 5 is started. Simultaneously with the start of the operation of the ventilation fan 5, the operation of the circulation fan 9 and the heater 10 is also started as necessary. Then, it returns to step S1.
[0043]
  Breaker 17 is closed when breaker 17 is closed18If is open, step S3 is NO and the process proceeds to step S7, but the AC power supply 4V for AC100V is not applied to the terminal block 7 in the second power connection determination circuit 21b connected to the terminal block 7. Therefore, no power connection signal is generated. Therefore, the process proceeds to step S5, and the control circuit 13 keeps the twin contact 14b open. Since the twin contact 14b has never been closed before, the device is protected.
  On the contrary, when the breaker 17 is open and the breaker 18 is closed, that is, when the AC200V power supply 3 is applied to the terminal block 6 later, the control circuit is not limited to the AC100V power supply 4 previously input to the terminal block 7. Since 13 does not operate, the device is in a stopped state and the device is not damaged.
[0044]
As described above, according to the second embodiment of the present invention, the AC200V power supply terminal 3 and the AC100V connection terminal block 7 are correctly connected to the AC200V power supply 3 and the AC100V power supply 4, respectively. Ventilation fan 5 and AC100V power supply 4 are mistakenly connected to terminal block 8, AC200V power supply 3 is applied to terminal block 6, then operation command for ventilation fan 5 is given from remote control 2, and AC100V power supply 4 is connected to terminal later. When applied to the base 7, the second power connection determination circuit 21 b connected to the terminal base 7 does not output a power connection signal indicating that the AC power supply 4 for AC 100 V is connected to the terminal base 8 to the control circuit 13. The control circuit 13 transmits the incorrect wiring abnormality to the remote control 2 to the remote control 2 via the communication line 24. The remote control 2 displays the erroneous wiring abnormality, and the control circuit 13 is connected to the terminal block 7 and the ventilation fan 5. With the ventilation fan connecting terminal block 8 Since the twin contact 14b is left open so that the operation coil 14a of the ventilation fan relay that drives the twin contact 14b is not opened, and the ventilation fan 5 is turned off, the device is in a stopped state. There is no equipment damage.
[0045]
【The invention's effect】
  As described above, according to the present invention, a high-voltage terminal block to which a high-voltage power supply is connected, a power supply circuit connected to the high-voltage terminal block, which converts AC to DC voltage and outputs, and a low-voltage terminal block A low-voltage terminal block to which a power supply is connected; a first actuator connected to the high-voltage terminal block via first-open switch means; a terminal block to which a second actuator is connected; In a device comprising a normally open second switch means provided between the base and the low voltage terminal block, and a control circuit that receives power from the power supply circuit and controls opening and closing of the first and second switch means, If a high voltage power supply and a low voltage power supply are mistakenly connected to the high voltage terminal block and the low voltage terminal block, the voltage judgment circuit connected to the low voltage terminal block will Is connected to the control circuit. Since the control circuit keeps the second switch means open and stops the operation of the second actuator at least, the second actuator is in a non-energized state and the equipment is not damaged. In addition, a high voltage power supply and a low voltage power supply are connected correctly to the high voltage terminal block and low voltage terminal block, respectively.When a low voltage power supply is connected in series to the second actuator, the power connection determination circuit connected to the second actuator is connected to the power supply indicating that the low voltage power supply is connected to the second actuator. Since the signal is output to the control circuit, and the control circuit keeps the second switch means open at least and puts the second actuator in a non-energized state, the device is in a stopped state,There is an effect that the equipment is not damaged.
[0047]
  AnotherAccording to the present invention, a high-voltage terminal block to which a high-voltage power supply is connected, a power supply circuit that is connected to the high-voltage terminal block, converts alternating current into a DC voltage, and is output, and a low-voltage power supply are connected. Low voltage terminal block, first actuator connected to high voltage terminal block via first switch means normally open, terminal block connected to second actuator, terminal block and low voltage terminal In a device provided with a normally open second switch means provided between the base and a control circuit that receives power from the power supply circuit and controls opening and closing of the first and second switch means,If a high voltage power supply and a low voltage power supply are mistakenly connected to the high voltage terminal block and the low voltage terminal block, the voltage judgment circuit connected to the low voltage terminal block will Is output to the control circuit, and the control circuit keeps the second switch means open and stops the operation of the second actuator. The power is on and there is no equipment damage.When a high voltage power supply and a low voltage power supply are correctly connected to the high voltage terminal block and the low voltage terminal block, respectively, and a low voltage power supply is connected in series to the second actuator, it is connected to the second actuator. The second power source connected to the low voltage terminal block and the first power source connection determination circuit outputs a power source connection signal indicating that the low voltage power source is connected in series to the second actuator. The connection determination circuit outputs a power connection signal indicating that a low voltage power source is connected to the low voltage terminal block to the control circuit, and the control circuit keeps the second switch means open at least, and the second actuator is operated. Since the device is in a non-energized state, the device is in a stopped state, and there is an effect that the device is not damaged.
  Further, when the second switch means is opened before closing, the control circuit may receive a power connection signal from the first power connection determination circuit and not receive a power connection signal from the second power connection determination circuit. Therefore, even if a low voltage power source is applied after the start of operation, the device can be protected from erroneous wiring in which the low voltage power source connected to the low voltage terminal block is short-circuited.
[0048]
  Also,The present inventionAccording to the present invention, the device has a display means, is equipped with a remote controller that outputs a command for operation / stop, and the control circuit receives a detection signal from the voltage determination circuit.1st andWe want to keep the second switch means open and let the display means on the remote control display an error in the incorrect wiring, so we will inform the contractor early about the incorrect wiring and quickly recover the initial work. There is an effect that can be performed.
[0049]
  In addition, according to the present invention, the device has a display means, and includes a remote controller that outputs an operation / stop command, and the control circuit is supplied from the power connection determination circuit.Power connection signalIn responseAt leastWe want to keep the second switch means open and let the display means on the remote control display an error in the incorrect wiring, so we will inform the contractor of the incorrect wiring at an early stage and quickly recover the initial work. There is an effect that can be performed.
[0050]
  Further, according to the present invention, the device includes a display unit, and includes a remote controller that outputs an operation / stop command, the control circuit receives a power connection signal from the first power connection determination circuit, and the second circuit When the power connection signal is not received from the power connection judgment circuitAt leastWe want to keep the second switch means open and let the display means on the remote control display an error in the incorrect wiring, so we will inform the contractor early about the incorrect wiring and quickly recover the initial work. There is an effect that can be performed.
[0051]
According to the present invention, the first actuator is a heater, the second actuator is a ventilation fan, and the device is a bath drying fan.
[0052]
Further, according to the present invention, the device equipped with the miswiring protection device is a bus drying fan, and when the low voltage power is relayed and supplied from the bus drying fan side to the external ventilation fan, Does not damage the equipment.
[Brief description of the drawings]
FIG. 1 is a circuit diagram of normal wiring according to a bus drying fan of a first embodiment of the present invention.
FIG. 2 is a circuit diagram of a miswiring pattern 1 related to the bus drying fan.
FIG. 3 is a circuit diagram of a miswiring pattern 2 according to the bus drying fan.
FIG. 4 is a flowchart showing the operation of the bus drying fan.
FIG. 5 is a circuit diagram of an erroneous wiring pattern according to the bus drying fan of Embodiment 2 of the present invention.
FIG. 6 is a flowchart showing the operation of the bus drying fan.
FIG. 7 is a circuit diagram showing a configuration of a conventional erroneous wiring protection circuit.
[Explanation of symbols]
1 Bus drying fan body 2 Remote control 3 AC200V power supply 4 AC100V power supply 5 AC100V ventilation fan 6 AC200V connection terminal block 7 AC100V connection terminal block 8 Ventilation fan connection terminal block 9 Circulating fan DESCRIPTION OF SYMBOLS 10 Heater, 11 Power supply circuit, 12 Connection line, 13 Control circuit, 14a Operation coil of ventilation fan relay, 14b twin contact, 15a Operation coil of circulation fan relay, 15b contact, 16a Operation coil of heater relay, 16b contact, 20 voltage determination circuit, 21 power connection determination circuit.

Claims

A high-voltage terminal block to which a high-voltage power supply is connected; a power supply circuit connected to the high-voltage terminal block that converts AC to DC voltage and outputs; a low-voltage terminal block to which a low-voltage power supply is connected; Provided between the first actuator connected to the high voltage terminal block via the normally open first switch means, the terminal block connected to the second actuator, and the terminal block and the low voltage terminal block An erroneous wiring protection device used in a device having the normally-switched second switch means and a control circuit that receives power from a power supply circuit and controls opening and closing of the first and second switch means,
A voltage determination circuit that is connected to the low-voltage terminal block and outputs a detection signal when only a high voltage is detected;
A power connection determination circuit connected to a terminal block to which the second actuator is connected and outputting a power connection signal when a voltage is detected;
When the detection signal from the voltage determination circuit is received and at least the second switch means is maintained open, and the detection signal from the voltage determination circuit is not received , the power connection signal from the power connection determination circuit is received. And the control circuit for closing the first and second switch means when the power supply connection signal is not received. .

The voltage determination circuit includes at least two resistors connected in series to a low voltage terminal block, and a series circuit of a constant voltage diode and a current detection element connected in parallel at both ends of the resistor where the divided voltage is generated. The erroneous wiring protection device according to claim 1, wherein

The power supply connection judging circuit, wherein said second actuator is faulty wiring protection device according to claim 1, characterized in that it consists of a series connected resistor and current detection device to the terminal block to be connected.

A high-voltage terminal block to which a high-voltage power supply is connected; a power supply circuit connected to the high-voltage terminal block that converts AC to DC voltage and outputs; a low-voltage terminal block to which a low-voltage power supply is connected; Provided between the first actuator connected to the high voltage terminal block via the normally open first switch means, the terminal block connected to the second actuator, and the terminal block and the low voltage terminal block An erroneous wiring protection device used in a device having the normally-switched second switch means and a control circuit that receives power from a power supply circuit and controls opening and closing of the first and second switch means,
A voltage determination circuit that is connected to the low-voltage terminal block and outputs a detection signal when only a high voltage is detected;
A first power connection determination circuit connected to a terminal block to which the second actuator is connected and outputting a power connection signal when a voltage is detected;
A second power connection determination circuit connected to the low voltage terminal block and outputting a power connection signal when a voltage is detected;
At least when the detection signal from the voltage determination circuit is received, the second switch means is kept open, and when the detection signal from the voltage determination circuit is not received ,
When the power connection signal is received from the first power connection determination circuit , at least the second switch means is kept open, does not receive the power connection signal from the first power connection determination circuit, and the second And a control circuit for closing the first and second switch means when receiving a power connection signal from the power connection determination circuit.

The device has a display means, comprising a remote controller for outputting a command of operation / stop to the control circuit,
The control circuit receives a detection signal from the voltage determination circuit, maintains the opening of the first and second switch means, and causes the display means of the remote control to display an abnormal wiring abnormality. Item 3. An erroneous wiring protection device according to any one of Items 1 and 2.

The device has a display means, comprising a remote controller for outputting a command of operation / stop to the control circuit,
The control circuit maintains the open of the second switch means and at the same time causes the display means of the remote controller to display an abnormal wiring abnormality even if it receives at least a power connection signal from the power connection determination circuit. Item 4. An erroneous wiring protection device according to any one of Items 1 and 3 .

The device has a display means, comprising a remote controller for outputting a command of operation / stop to the control circuit,
When the control circuit receives a power connection signal from the first power connection determination circuit and does not receive a power connection signal from the second power connection determination circuit, the control circuit keeps the second switch means open at least. 5. The miswiring protection device according to claim 4 , wherein an error display of miswiring is displayed on the display means of the remote controller.

The erroneous wiring protection device according to claim 1, wherein the first actuator is a heater, and the second actuator is a ventilation fan.

A device equipped with the erroneous wiring protection device according to any one of claims 1 to 9, wherein the device equipped with the erroneous wiring protection device is a bus drying fan.