JP3827392B2

JP3827392B2 - Electronic or electrical equipment

Info

Publication number: JP3827392B2
Application number: JP05137997A
Authority: JP
Inventors: 裕立山
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 1997-03-06
Filing date: 1997-03-06
Publication date: 2006-09-27
Anticipated expiration: 2017-03-06
Also published as: JPH10244095A

Description

【０００１】
【発明の属する技術分野】
本発明は、電源の制御回路を備えたＡＶ機器や洗濯機等の電子または電気機器に関するものである。
【０００２】
【従来の技術】
従来、洗濯機の電源制御装置としては、特許第２５２３７９８号等に開示されたような技術が知られている。これは、電源プラグをコンセントに差し込むと、制御回路に交流電源が接続されて制御回路が動作状態となり、その後運転開始指示により負荷回路と交流電源間に設けたリレー接点が閉じて、負荷回路に交流電源が供給される。運転終了時の自動電源ＯＦＦ、または使用者による電源ＯＦＦが指示された場合は、制御回路によりリレー接点が開成され、負荷回路への交流電源の供給を遮断するが、制御回路には電源プラグを抜かない限り交流電源を供給し続ける構成になっている。
【０００３】
また、図１０に示すように、負荷回路１の作動時に、負荷回路１への交流電源４の供給を強制的に遮断するスイッチ６を別に設けたものがある。これは、電源スイッチ３を押圧して閉成すると制御回路２へ交流電源４が接続され、制御回路２は動作状態となる。その結果、制御回路２は電源リレー５を閉成させ、電源スイッチ３の開成時も制御回路２に交流電源４を供給し、電源リレー５を自己保持させて、制御回路２および負荷回路１への交流電源４の供給を継続して行わせる。
【０００４】
一連の洗濯運転の動作の終了時は、制御回路２により電源リレー５を開成させ、自動的に制御回路２への交流電源４の供給を遮断させるとともに負荷回路１への交流電源４の供給も遮断する。負荷回路１の作動中に交流電源４の供給を遮断させる場合は、スイッチ６を押圧閉成して制御回路２に電源を遮断させる指示を与え、その指示に基づき制御回路２は電源リレー５を開成する。
【０００５】
【発明が解決しようとする課題】
特許第２５２３７９８号に開示された従来例においては、１個のスイッチで電源のＯＮ、ＯＦＦを行えるが、運転終了後等の電源を切った状態の待機時においても制御回路へ交流電源を供給しているため、少量ではあるが電力を消費し続けている。近年、一般家庭における洗濯機等の電気機器でもマイコン内蔵のものが増えており、これらの機器は電源に接続しただけで電力の消費を伴う待機電力が発生し、その合計は無視できない値になって来ている。将来、電力の供給不足が生じることを考慮して、エネルギーの消費を削減するため、上記のような待機電力をも削減する必要がある。
【０００６】
また、図１０に示す従来例では、待機時は電源リレーにより制御回路は交流電源より遮断されるため待機電力はゼロになるが、その構成は電源のＯＮ、ＯＦＦ制御のために、電源をＯＮするためのスイッチと電源をＯＦＦするためのスイッチを別個に設けることが必要になり、操作スイッチの増加を招くものとなる。このような操作スイッチの増加は、洗濯機等の電気機器の操作部のスペースを拡大させ、スイッチユニットが大型化し、制御装置が高価になるだけでなく、操作が繁雑になり、使用者に取って使いにくく、不便さを感じるという問題がある。
【０００７】
本発明は上記課題に鑑み、洗濯機等の電子または電気機器の待機時における電力消費を無くすとともに、安価でしかも操作性の良い電源の制御装置を備えた電子または電気機器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】
上記目的を達成するため、本発明の電子または電気機器は、電子または電気機器本体の負荷回路と、上記負荷回路に並列に接続されて上記負荷回路を制御する制御手段と、該制御手段に上記負荷回路の制御状態を指示する指示手段と、上記指示手段の指示状態を表示する表示手段と、上記負荷回路に直列に接続した電源スイッチ手段と、上記電源スイッチ手段と並列に設けた電源リレー手段とを設け、上記負荷回路と電源スイッチ手段の直列回路を電源に直列に接続するようにした電子または電気機器において、上記電源スイッチ手段の開閉状態を検出する検出手段を備え、上記電源スイッチ手段の負荷側の端子と上記電源リレー手段の負荷側の端子間にホトカプラの入力端子を接続し、上記電源スイッチ手段とホトカプラの入力端子との接続点を、抵抗を介して上記電源スイッチ手段および電源リレー手段が接続されていない側の電源の端子に接続し、上記ホトカプラの出力端子より導出される出力信号を上記検出手段の検出信号として導出させるとともに、該検出信号に基づき、上記制御手段から導出される制御信号で上記電源リレー手段を制御するリレー制御手段を設け、該リレー制御手段により、上記電源リレー手段を、該電源リレー手段が開成状態で上記電源スイッチ手段を閉成したとき、該電源リレー手段を閉成状態にしてこの状態を保持し、上記電源リレー手段が閉成状態で上記電源スイッチ手段を閉成したとき、該電源リレー手段を開成状態にするようにしたことを特徴とする。
【０００９】
電源リレー手段が開成状態で、この電源リレー手段に並列に設けられた電源スイッチ手段を閉成、すなわち押圧すると、交流電源が制御手段に通電され、制御手段が動作状態になる。制御手段が動作を開始すると電源リレー手段を閉成し、電源スイッチ手段が開成した状態に復帰しても、電源リレー手段の接点を介して制御手段に交流電源が接続されているので、電源リレー手段の接点は制御手段により電源リレー手段を開成させるための信号が出るまで自己保持される。従って、電源スイッチが一旦閉成された後開成されても、制御回路は動作を維持することができ、指示手段により制御手段に指示された命令等により、負荷回路へ通電して運転が可能となる。指示手段で指示された命令等は、機器本体の操作パネル等に設けられた表示手段に表示される。
【００１０】
制御手段の動作中に電源スイッチ手段が押圧閉成されると、電源スイッチ手段の開閉を検出する検知手段から、制御手段へ電源スイッチ手段の閉成を検出した検出信号が伝わり、制御手段は電源リレー手段を開成させるための信号を出力し、電源リレー手段を開成させる。また、電源リレー手段を開成させるべく信号を出力した後、制御手段が電源スイッチ手段の閉成を検出したときは、再び電源リレー手段を閉成させるべく信号を出力し、電源リレー手段を閉成させる。以上の作用により、電源スイッチひとつで電源リレー手段を開閉成できる。
【００１６】
また、電源リレー手段が開成状態で電源スイッチ手段を押圧閉成すると、電源スイッチ手段を介し制御手段に電源が接続され、制御手段は電源リレー手段を閉成し、負荷回路に電源を接続する。この状態で電源スイッチ手段の押圧が解除され、該電源スイッチが開成しても、制御手段は電源リレー手段を介して電源に接続されているので、制御手段は動作状態を保ち、電源リレー手段も動作状態を自己保持する。この状態では、ホトカプラには抵抗を介して電流が流れるので、検出手段より制御手段には検出信号が供給される。
【００１７】
電源リレー手段が閉成状態で電源スイッチ手段を閉成すると、ホトカプラの入力端子には電圧が印加されなくなり、ホトカプラは出力を導出しなくなる。検出手段はこれを検出して制御手段に伝え、電源リレー手段を開成して制御手段および負荷回路の電源を遮断する。
【００１８】
この場合、電源スイッチ手段は、一つの接点で電源スイッチ手段の開閉を検知する検出手段の形成が可能である。電源リレー手段の閉成中に電源スイッチ手段が開成すると、ホトカプラの入力端子側には抵抗を介して電源より電流が流れるが、電源スイッチ手段を閉成すると、その電流は電源スイッチ手段に流れるため、ホトカプラの入力端子側には流れなくなる。この電流変化がホトカプラの出力端子側に伝わり、検出手段で検出して、制御手段に電源スイッチの開閉を伝える。
【００１９】
また本発明の電子または電気機器は、電子または電気機器本体の負荷回路と、上記負荷回路に並列に接続されて上記負荷回路を制御する制御手段と、該制御手段に上記負荷回路の制御状態を指示する指示手段と、上記指示手段の指示状態を表示する表示手段と、上記負荷回路に直列に接続した電源スイッチ手段と、上記電源スイッチ手段と並列に設けた電源リレー手段とを設け、上記負荷回路と電源スイッチ手段の直列回路を電源に直列に接続するようにした電子または電気機器において、上記電源スイッチ手段の開閉状態を検出する検出手段を備え、上記電源スイッチ手段の電源側の端子と上記電源リレー手段の電源側の端子間にホトカプラの入力端子を接続し、上記電源スイッチ手段と電源リレー手段の相互に接続した負荷側の端子を、抵抗を介して上記電源スイッチ手段および電源リレー手段が接続されていない側の電源の端子に接続し、上記ホトカプラの出力端子より導出される出力信号を上記検出手段の検出信号として導出させるとともに、該検出信号に基づき、上記制御手段から導出される制御信号で上記電源リレー手段を制御するリレー制御手段を設け、該リレー制御手段により、上記電源リレー手段を、該電源リレー手段が開成状態で上記電源スイッチ手段を閉成したとき、該電源リレー手段を閉成状態にしてこの状態を保持し、上記電源リレー手段が閉成状態で上記電源スイッチ手段を閉成したとき、該電源リレー手段を開成状態にするようにしたことを特徴とする。
【００２０】
電源リレー手段が開成状態で電源スイッチ手段を閉成すると、制御手段へは電源スイッチ手段を介して、交流電源が接続され、上記電源リレー手段を閉成する。この状態で電源スイッチ手段の押圧を解除し、該電源スイッチ手段を開成しても、上記電源リレー手段は制御手段により自己保持して閉成状態を保つ。このとき、ホトカプラは電源スイッチ手段の開成で、電源より切り離される。
【００２１】
電源リレー手段が閉成し、制御手段および負荷回路に電源が接続されている上記の状態において、電源スイッチ手段を押圧閉成すると、ホトカプラの入力端子には上記電源スイッチ手段を介して電流が流れ、ホトカプラの出力端子より出力信号が導出され、この出力信号が検出手段を介して制御手段に伝えられる。従って、制御手段は検出手段からの信号の変化を検出し、この信号変化に基づき電源リレー手段を開成する。その後、電源スイッチの押圧解除による開成で初期の状態に戻る。
【００２２】
また本発明の電子または電気機器は、上記構成の電子または電気機器において、上記ホトカプラの入力端子と並列に該ホトカプラへの電流を制限する電流制限用の抵抗を設けたことを特徴とする。
【００２３】
ホトカプラと並列に電流制限用の抵抗を設けているので、ホトカプラの入力端子に大きな電流が流れるのを防止することができ、ホトカプラの入力端子を保護することができる。
【００２４】
また本発明の電子または電気機器は、電子または電気機器本体の負荷回路と、上記負荷回路に並列に接続されて上記負荷回路を制御する制御手段と、該制御手段に上記負荷回路の制御状態を指示する指示手段と、上記指示手段の指示状態を表示する表示手段と、上記負荷回路に直列に接続した電源スイッチ手段と、上記電源スイッチ手段と並列に設けた電源リレー手段とを設け、上記負荷回路と電源スイッチ手段の直列回路を電源に直列に接続するようにした電子または電気機器において、上記電源スイッチ手段の開閉状態を検出する検出手段を備え、上記電源スイッチ手段の負荷側の端子と上記電源リレー手段の負荷側の端子間に第１のダイオードを設け、該第１のダイオードと上記電源スイッチ手段の負荷側の端子との接続点と、上記電源スイッチ手段および電源リレー手段が接続されていない側の電源の端子との間に、ホトカプラの入力端子と抵抗と第２のダイオードとの直列回路を、該第２のダイオードに流れる電流が上記第１のダイオードに流れないように接続し、上記ホトカプラの出力端子より導出される出力信号を上記検出手段の検出信号として導出させるとともに、該検出信号に基づき、上記制御手段から導出される制御信号で上記電源リレー手段を制御するリレー制御手段を設け、該リレー制御手段により、上記電源リレー手段を、該電源リレー手段が開成状態で上記電源スイッチ手段を閉成したとき、該電源リレー手段を閉成状態にしてこの状態を保持し、上記電源リレー手段が閉成状態で上記電源スイッチ手段を閉成したとき、該電源リレー手段を開成状態にするようにしたことを特徴とする。
【００２５】
従って、電源リレー手段が開成状態のとき、電源スイッチ手段を押圧閉成すると、電源スイッチ手段を介して制御手段に交流電源が接続され、制御手段が動作状態になり、電源リレー手段を閉成し、該電源リレー手段を介し負荷回路および制御手段に交流電源が接続される。
【００２６】
また、電源スイッチ手段の閉成で、ホトカプラには該電源スイッチ手段および第２のダイオードを介して電流が流れ、検出手段より制御手段に電源スイッチ手段の閉成状態を示す検出信号が供給されるが、制御手段はこの検出信号で動作しないようにしている。この状態で電源スイッチ手段の押圧が解除され、該電源スイッチ手段が開成されると、制御手段へは電源リレー手段を介して交流電源が接続されているので、電源リレー手段を開成状態に自己保持させるが、第１および第２のダイオードによりホトカプラには電流が流れなくなり、検出手段の出力がなくなる。
【００２７】
電源リレー手段が閉成状態で電源スイッチ手段を再び押圧閉成すると、第１のダイオードには電流が流れなくなり、第２のダイオードおよびホトカプラに電流が流れ始める。検出手段はこれを検出して検出信号を制御手段に供給し、制御手段は電源リレー手段を開成して、負荷回路および制御手段への電源の供給を遮断する。
【００２８】
また本発明の電子または電気機器は、電子または電気機器本体の負荷回路と、上記負荷回路に並列に接続されて上記負荷回路を制御する制御手段と、該制御手段に上記負荷回路の制御状態を指示する指示手段と、上記指示手段の指示状態を表示する表示手段と、上記負荷回路に直列に接続した電源スイッチ手段と、上記電源スイッチ手段と並列に設けた電源リレー手段とを設け、上記負荷回路と電源スイッチ手段の直列回路を電源に直列に接続するようにした電子または電気機器において、上記電源スイッチ手段の開閉状態を検出する検出手段を備え、上記電源スイッチ手段を負荷側の接点が常時閉成接点と押圧時閉成接点よりなるスイッチで構成し、上記押圧時閉成接点を上記電源リレー手段の負荷側の端子に接続し、上記常時閉成接点と、上記電源スイッチ手段および電源リレー手段が接続されていない側の電源の端子との間に、上記電源リレー手段と連動して開閉するリレー接点とダイオードと抵抗の直列回路を設け、上記抵抗による分圧した電圧を上記検出手段の検出信号として導出させるとともに、該検出信号に基づき、上記制御手段から導出される制御信号で上記電源リレー手段を制御するリレー制御手段を設け、該リレー制御手段により、上記電源リレー手段を、該電源リレー手段が開成状態で上記電源スイッチ手段を閉成したとき、該電源リレー手段を閉成状態にしてこの状態を保持し、上記電源リレー手段が閉成状態で上記電源スイッチ手段を閉成したとき、該電源リレー手段を開成状態にするようにしたことを特徴とする。
【００２９】
従って、電源リレー手段が開成状態で電源スイッチ手段を押圧すると、電源スイッチ手段の常時閉成接点は開成し、押圧時閉成接点が閉成する。電源は閉成した押圧時閉成接点を介し開成制御手段に接続され、制御手段を動作状態にし、電源リレー手段およびこの電源リレー手段に連動したリレー接点を閉成する。
【００３０】
従って、その後、電源スイッチ手段の押圧を除解し、該電源スイッチ手段を開成しても、制御手段および負荷回路には電源リレー手段を介して電源が接続されているので、電源リレー手段およびこれに連動するリレー接点は閉成状態を保持する。この状態では電源スイッチ手段の常時閉成接点と上記リレー接点を介しダイオードに電流が流れ、検出手段より検出信号が出力され、制御手段に入力されている。
【００３１】
次に、再び電源スイッチ手段を押圧すると、該電源スイッチ手段の常時閉成接点が開成する。従って、上記ダイオードには電流が流れなくなり、検出手段は導出していた出力信号を導出しなくなる。制御手段は上記検出手段からの検出信号の変化より、電源リレー手段およびこれに連動するリレー接点を開成し、初期の状態に戻り、次に電源スイッチ手段の押圧が検出手段で検出されないようにする。
【００３２】
上記のように、電源リレー手段の開成時に、電源スイッチ手段を常時閉成接点から押圧時閉成接点に切替えたとき、制御手段には押圧時閉成接点を通じ、電源が供給されるが、制御手段が正常に動作し、電源リレー手段および電源リレー手段に連動したリレー接点を閉成するまでは、電源スイッチ手段と制御手段及び電源スイッチ手段の開閉を検出する検出手段とは電気的に分離されている。
【００３３】
電源リレー手段の閉成中は、電源スイッチ手段の開閉を検出する検出手段と電源スイッチ手段手段は、電源リレー手段に連動するリレー接点の閉成により接続されている。電源スイッチ手段が常時閉成接点に接続されているときは、上記検出手段は電源スイッチ手段の常時閉成接点を介し交流電源の一端と接続され、また電源スイッチ手段が押圧時閉成接点に接続されている場合は、上記交流電源とは遮断されている。この交流電源の入力の有無による電流の変化が上記検出手段で検出され、制御手段に電源スイッチ手段の開閉を伝える。
【００３４】
また本発明の電子または電気機器は、上記構成の電子または電気機器において、上記電源と制御手段が接続されていない電源リレー手段の開成時に、電源スイッチ手段を閉成し、制御手段へ上記電源を供給した後、上記検出手段による電源スイッチ手段の開成を検出するまでは、上記制御手段は、次の上記検出信号を受け付けないようにしたことを特徴とする。
【００３５】
従って、電源リレー手段の開成時に、電源スイッチ手段を押圧して制御手段へ上記電源を供給する場合、制御手段が正常に動作を開始し、電源リレー手段が閉成した状態で電源スイッチ手段が継続して閉成状態にあると、制御手段はこれを無効と判断し、電源リレー手段を閉成状態に保持する。即ち、電源リレー手段の閉成時において、電源スイッチ手段手段が閉成し続ける場合には、電源リレー手段の閉成時における電源スイッチ手段の閉成とは認識しないようにして、電源リレー手段が開成するのを防止する。
【００３６】
また本発明の電子または電気機器は、上記構成の電子または電気機器において、上記電源と制御手段が接続されている電源リレー手段の閉成時に、上記検出手段により電源スイッチ手段の閉成が検知されても、制御手段は電源リレー手段を閉成状態に保ち、その後上記検出手段により電源スイッチ手段の開成への復帰が検知されたとき、上記制御手段が電源リレー手段を開成するようにしたことを特徴とする。
【００３７】
電源リレー手段の閉成時に、電源スイッチ手段を閉成して上記電源リレー手段を開成しようとするとき、電源スイッチ手段が押圧閉成された後、押圧が解除されて電源スイッチ手段が開成されることを検出手段で検出し、この検出信号によって電源リレー手段の開成を行わせる。
【００３８】
従って、電源スイッチ手段の押圧継続時に、検出手段で検出した電源スイッチ手段の閉成による信号で電源リレー手段を開成すると、電源リレー手段の開成と電源スイッチ手段の閉成信号により、再び電源リレー手段を閉成しようとする誤動作を行うが、電源スイッチ手段の押圧閉成後の押圧解除による開成を検出して電源リレー手段の開成を行わせるので、上記の誤動作を防止することができる。
【００３９】
また本発明の電子または電気機器は、上記構成の電子または電気機器において、上記電源と制御手段が接続されている電源リレー手段の閉成時に、上記検出手段が、電源スイッチ手段の閉成を検出したとき、上記制御手段は負荷回路を停止させて、電源リレー手段は閉成状態を保持するようにしたことを特徴とする。
【００４０】
電源リレー手段の閉成時に、電源スイッチ手段を押圧閉成して電源リレー手段を開成するとき、電源スイッチ手段の開閉を検出する検出手段が電源スイッチ手段の閉成を検出すると、負荷回路への電源の供給を直ちに停止させ、電源リレー手段は閉成状態を保持させる。従って、負荷回路が、例えば洗濯機のモータである場合のように、使用者の指示によって負荷回路の動作を即刻停止させなければならないような場合でも、これに対応することができる。
【００４１】
また本発明の電子または電気機器は、上記構成の電子または電気機器において、制御手段により電源リレー手段の開成がなされるべきときから、予め定めた一定時間経過後も上記電源リレー手段の開成が行われないとき、制御手段は異常と判断して電源リレー手段を閉成状態を保つ制御に切り換え、表示手段に異常を報知させるようにしたことを特徴とする。
【００４２】
従って、例えば電源リレー接点の溶着等の故障で、制御手段が電源リレー手段を開閉させるべく制御しているのに、交流電源が一定時間以上供給され続けたとき、制御手段はこれを異常として判断して表示装置に表示させるとともに、電源リレー手段を閉成状態に保つ制御に切り換え、表示を継続させる。これにより使用者が気付きにくい故障でも容易に報知することができ、異常による待機電力の消費をなくすることができる。
【００４３】
【本発明の実施の形態】
以下、図面と共に本発明の実施形態を説明する。
【００４４】
（実施形態１）
図１は本発明を洗濯機に適用した実施形態１のブロック図であり、図１０に示す従来例に対応する部分には同一符号を付し、説明を省略する。図１において、負荷回路１は、排水弁７、給水弁８および洗濯機モータ９より成る負荷１０と、該負荷１０を制御する負荷制御素子群１１で構成される。図中、１２は制御回路２に対して上記負荷の制御状態を指示する制御指示装置であり、１３は上記制御指示装置１２より指示された洗濯機の制御状態を表示する表示装置、１４は電源スイッチ３の開閉状態を検出する検出回路、１５は上記制御回路２からの制御信号により、電源リレー５を開閉制御する電源リレー制御コイルである。
【００４５】
従って、図１に示す構成によれば、押釦スイッチより成る電源スイッチ３を押圧すると、該電源スイッチ３は閉成し、交流電源４を制御回路２に接続して該制御回路２を動作状態にする。制御回路２が動作を開始すると、該制御回路２より電源リレー制御コイル１５に電源リレー５を閉成させるべく信号が供給され、電源リレー５を閉成する。
【００４６】
電源リレー５が閉成すると電源スイッチ３の押圧が解除され、該電源スイッチ３が開成状態に復帰しても、電源リレー５を介して制御回路２と負荷回路１に交流電源４が供給される。上記のような電源リレー５の閉成状態は、制御回路２より電源リレー５を開成させるための信号が、電源リレー制御コイル１５に出力されるまで自己保持される。
【００４７】
従って、電源スイッチ３が一端閉成されると、その後開成されても制御回路２は動作状態を維持することができ、制御回路２は負荷回路制御素子群１１を制御して負荷１０を動作させ、また制御指示装置１２からの入力、および表示装置１３への出力も可能にし、一連の洗濯機の動作が行える状態となる。
【００４８】
制御指示装置１２からの入力により、例えば洗い、すすぎ、脱水等の一連の洗濯動作が開始され、実行されて、全工程を終了すると、制御回路２は電源リレー制御コイル１５に電源リレー５を開成させるべく信号を出力し、電源リレー５を開成する。これにより、交流電源４は制御回路２と負荷回路１より遮断され、一連の洗濯動作が終了する。そして、この洗濯動作の終了後は、自動的に全ての回路が交流電源４より切り離されるので、洗濯機の消費電力をゼロにすることができる。
【００４９】
また、上記制御回路２の動作中に電源スイッチ３を閉成すると、電源スイッチ３の開閉を検出する検出回路１４がこれを検出し、制御回路２に検出信号を伝える。制御回路２は上記の検出信号を受けて、電源リレー制御コイル１５に電源リレー５を開成させるべく信号を出力し、電源リレー５を開成する。このように、使用者による電源スイッチ３の閉成操作により、いつでも制御回路２と負荷回路１を交流電源４より遮断することができ、交流電源４を遮断した後は洗濯機の消費電力をゼロにすることができる。
【００５０】
従って、上述する本発明の実施形態１によれば、電源スイッチ３を１個設けるだけで、交流電源４を負荷回路１および制御回路２へ投入したり、遮断させることになり、また電源ＯＦＦ時の待機電力をゼロにすることができる。
【００５１】
（実施形態２）
図２は本発明の実施形態２のブロック図であり、図１に対応する部分には同一符号を付し、説明を省略する。図２が図１と相違する点は、電源スイッチ３と電源スイッチ開閉検出回路１４が、一実施形態として具体的に示されている点である。図２において、電源スイッチ３は連動して開閉を行う二つの接点３ａと３ｂをもつ二回路スイッチであり、上記接点３ａは電源リレー５と並列に接続し、他方の接点３ｂは、抵抗１６に接続するとともに、この抵抗１６と接点３ｂとを備えた回路にて電源スイッチ３の開閉を検出する検出回路１４を構成する。この検出回路１４は、抵抗１６の両端より電源リレー５の開閉を制御する信号を制御回路２に供給する。
【００５２】
即ち、電源スイッチ３を押圧すると接点３ａ、３ｂは閉成し、接点３ａは電源リレー５が開成している状態では、制御回路２に交流電源４を供給し、制御回路２を動作させる役割をはたす。接点３ｂは閉成すると抵抗１６を介し制御回路２にＬｏｗ電位を与える端子１７によりＬｏｗ電位、すなわち電源スイッチ３の閉成状態を示す検出信号を伝え、電源リレー制御コイル１５を介し電源リレー５を閉成する。
【００５３】
電源スイッチ３の押圧を解除すると、接点３ｂは開成し、制御回路２へは検出回路１４の抵抗１６を介しＨｉｇｈ電位を与える端子１８によりＨｉｇｈ電位、すなわち電源スイッチ３の開成状態を示す検出信号を伝える。つまり、電源スイッチ３の開閉は電源スイッチ３の開閉を検出する検出回路１４より、Ｌｏｗ電位（電源スイッチ閉）およびＨｉｇｈ電位（電源スイッチ開）の電気信号として導出され、制御回路２に供給される。従って、この信号に応じ、制御回路２は電源リレー制御コイル１５に図１の場合と同様の制御信号を供給し、電源リレー５の開閉を制御する。
【００５４】
（実施形態３）
図３は本発明の実施形態３のブロック図であり、図２に対応する部分には同一符号を付し、説明を省略する。図３が図１、図２と相違する点は、電源スイッチ３の開閉状態を検出するホトカプラで構成した回路を設けたことである。図３において、電源スイッチ３はホトカプラ１９の入力側端子及び電流制限用抵抗２０と直列に接続し、この直列回路を電源リレー５に並列に接続する。
【００５５】
また、上記電流制限用抵抗２０と電源スイッチ３の接続点から、電流制限用抵抗２１を介して電源リレー５が接続された側とは反対側の交流電源４の端子に接続する。上記ホトカプラ１９の出力端子は、抵抗１６に接続するとともに、この抵抗１６と電流制限用抵抗２１とホトカプラ１９とを備えた回路にて電源スイッチ３の開閉を検出する検出回路１４を構成する。電源リレー５の開成時に電源スイッチ３を押圧し、閉成すると、交流電源４は電源スイッチ３、電流制限用抵抗２０、及びホトカプラ１９の入力端子を通って制御回路２に接続され、制御回路２を動作状態になる。その結果、電源リレー制御コイル１５が作動し、電源リレー５を自己保持させる。
【００５６】
電源リレー５が閉成し、制御回路２が動作中に電源スイッチ３の押圧が解除されて開成されると、ホトカプラ１９の入力端子には電源リレー５、電流制限用抵抗２０、２１を介して交流電源４が接続され、ホトカプラ１９の入力端子には電流が流れる。ホトカプラ１９の入力端子に電流が流れると、その信号は光出力になってホトカプラ１９の出力端子側のホトトランジスタに伝えられ、該ホトトランジスタがＯＮ状態となる。上記のホトトランジスタがＯＮ状態となると、制御回路２にはＬｏｗ電位を与える端子１７によりＬｏｗ電位が供給され、電源リレー制御コイル１５を作動状態に保ち、電源リレー５を閉成状態に保持する。
【００５７】
また、電源リレー５が閉成し、制御回路２が動作中に電源スイッチ３が押圧されて閉成されると、ホトカプラ１９及び電流制限用抵抗２０に流れていた電流は電源スイッチ３を介して流れてしまうため、ホトカプラ１９の入力端子には電流が流れなくなる。従って、ホトカプラ１９の出力端子側に設けたホトトランジスタはＯＦＦ状態となり、制御回路２には抵抗１６を介しＨｉｇｈ電位を与える端子１８によりＨｉｇｈ電位が印加され、電源リレー制御コイル１５を介して電源リレー５を開成する。
【００５８】
つまり、電源スイッチ３の開閉は、電源スイッチ３の開閉を検出する検出回路１４により、Ｌｏｗ電位（電源スイッチ開）、およびＨｉｇｈ電位（電源スイッチ閉）の電気信号に変換され、制御回路２に供給される。そして、この信号に応じ、制御回路２は電源リレー制御コイル１５に、図１および図２に示す実施形態の場合と同様の制御信号を供給し、電源リレー５の開閉を制御する。
【００５９】
（実施形態４）
図４は本発明の実施形態４のブロック図であり、図３に対応する部分には同一符号を付し、説明を省略する。図４が図３と相違する点は、電源リレー５と電源スイッチ３の負荷側の接点間、即ちホトカプラ１９の入力端子と電流制限用抵抗２０の直列回路と並列に電流制限用抵抗２２を設けたことであり、他の構成は図３と同一である。
【００６０】
図４に示すように、ホトカプラ１９の入力端子と電流制限用抵抗２０の直列回路と並列に電流制限用抵抗２２を設けると、電源リレー５と電源スイッチ３の開閉により、ホトカプラ１９の入力端子間に流れる電流を、電流制限用抵抗２０の作用と相侯って抑制することができ、ホトカプラの過電流による破壊をより確実に保護することができる。
【００６１】
（実施形態５）
図５は本発明の実施形態５のブロック図であり、図３に対応する部分には同一符号を付し、説明を省略する。図５が図３と相違する点は、ホトカプラ１９と電流制限用抵抗２０による電源スイッチ３の開閉検出回路を、図３では電源リレー５と電源スイッチ３の負荷側に設けているのに対して、図５では電源側に設けたことであり、その他の構成は同一である。
【００６２】
電源リレー５の開成時に電源スイッチ３を押圧閉成すると、制御回路２と負荷回路１に電源４が接続され、制御回路２により電源リレー５が閉成する。この状態では、ホトカプラ１９の入力端子には電流が流れ、ホトカプラ１９の出力端子側のホトトランジスタは閉成する。その後、電源スイッチ３の押圧解除で該電源スイッチ３を開成すると、ホトカプラ１９の入力端子への電流は流れなくなり、ホトトランジスタはＯＦＦ状態となるが電源リレー５は制御回路２により閉成状態に自己保持され、負荷回路１は交流電源４が接続された状態を保つ。
【００６３】
上記の状態で電源スイッチ３を再び閉成すると、ホトカプラ１９の入力端子には電流が流れ、ホトカプラ１９の出力端子側のホトトランジスタが閉成する。検出回路１４は、抵抗１６で上記ホトトランジスタのＯＦＦからＯＮへの変化を検出し、この検出信号を制御回路２に伝え、制御回路２は電源リレー５を開成する。その結果、負荷回路１および制御回路２は交流電源４より遮断される。
【００６４】
（実施形態６）
図６は本発明の実施形態６のブロック図であり、図５に対応する部分には同一の符号を付し、説明を省略する。図６が図５と相違する点は、電源リレー５と電源スイッチ３の電源側の接点間、即ちホトカプラ１９の入力端子と電流制限用抵抗２０の直列回路と並列に電流制限用抵抗２２を設けたことであり、その他の構成は同一である。
【００６５】
図６に示すように、ホトカプラ１９の入力端子と電流制限用抵抗２０の直列回路と並列に電流制限用抵抗２２を設けると、電源リレー５と電源スイッチ３の開閉により、ホトカプラ１９の入力端子間に流れる電流を電流制限用抵抗２０の作用と相侯って抑制することができ、ホトカプラ１９の過電流による破壊をより確実に保護することができる。
【００６６】
（実施形態７）
図７は本発明に実施形態７のブロック図であり、図１に対応する部分には同一符号を付し、説明を省略する。図７において、電源スイッチ３はダイオード２３と直列に接続され、この直列回路は電源リレー５に並列に接続される。前記直列回路のダイオード２３のカソード側と電源スイッチ３の接続点は、ダイオード２４、抵抗２５およびホトカプラ２６の入力端子を介し電源リレー５が接続された側とは反対側の交流電源４の端子に接続される。
【００６７】
上記ホトカプラ２６の入力端子側のＬＥＤと、上記ダイオード２４は同一方向に接続されており、上記ダイオード２３は上記ホトカプラ２６の入力端子側のＬＥＤおよび上記ダイオード２４に流れる電流を流さない方向、即ち上記ＬＥＤとダイオード２４に流れる電流を阻止する方向に接続される。上記ホトカプラ２６の出力端子は抵抗２７と直列に接続され、Ｈｉｇｈ電位を与える端子１８とＬｏｗ電位を与える端子１７間で直列回路を形成するよう制御回路２に接続される。
【００６８】
電源リレー５の開成時に電源スイッチ３を押圧し開成すると、交流電源４はダイオード２３を介し制御回路２に接続され、交流半波のみで制御回路２を動作状態にする。その結果、制御回路２は電源リレー制御コイル１５を駆動し、電源リレー５を開成状態にする。その後、制御回路２および負荷回路１は電源リレー５を介し通常の交流全波で動作状態を保持する。
【００６９】
電源リレー５が閉成し、制御回路２が動作中に電源スイッチ３の押圧が解除されて開成されていると、ホトカプラ２６の入力端子にはダイオード２３があるため、電流が流れることはない。ホトカプラ２６の入力端子に電流が流れなくなると、ホトカプラ２６の出力端子側のホトトランジスタはＯＦＦ状態になり、制御回路２には抵抗２７を介し端子１７よりＬｏｗ電位が伝えられ、制御回路２は電源リレー制御コイル１５を駆動して電源リレー５を閉成状態に保持する。
【００７０】
また、電源リレー５が閉成し、負荷回路１及び制御回路２が動作中に電源スイッチ３が押圧され開成されると、ホトカプラ２６の入力端子には抵抗２５、ダイオード２４及び電源スイッチ３を介し電流が流れることになる。ホトカプラ２６の入力端子に電流が流れると、その信号は光信号に変換されてホトカプラ２６の出力端子側のホトトランジスタに伝えられ、このホトトランジスタはＯＮ状態となる。
【００７１】
その結果、制御回路２には上記ホトトランジスタを介しＨｉｇｈ電位の信号が端子１８より供給され、制御回路２はこれを検出して電源リレー制御コイル１５への電流の供給を遮断し、電源リレー５を開成して、電源スイッチ３の押圧解除による開成に伴い、負荷回路１および制御回路２への交流電源４の供給を遮断する。
【００７２】
上記のように、電源スイッチ３の開閉は検出回路１４より検出され、電源リレー５の開成時に電源スイッチ３をＯＮしたときは、制御回路２にＬｏｗ電位の信号を与え、電源リレー制御コイル１５を駆動して電源リレー５を閉成し、電源スイッチ３を開成しても自己保持するようになっている。また、電源リレー５の閉成時に上記電源スイッチ３をＯＮすると、制御回路２にＨｉｇｈ電位の信号が与えられ、電源リレー制御コイル１５への電流供給を断ち、電源リレー５を開成して負荷回路１および制御回路２への電源の供給を断つ。
【００７３】
（実施形態８）
図８は本発明の実施形態８のブロック図であり、図１に対応する部分には同一符号を付し、説明を省略する。図８において、電源スイッチ３０は常時閉成接点３０Ａと押圧時閉成接点３０Ｂを有するスイッチである。上記常時閉成接点３０Ａは、電源リレー制御コイル１５により電源リレー５と連動して作動する電源連動リレー３２、ダイオード２８、抵抗２９、及び抵抗３１を介し電源リレー５が接続された側とは反対側の交流電源４の端子に接続される。上記交流電源４の電源リレー５が接続されていない側の端子は、制御回路２へＨｉｇｈ電位の信号を与える端子１８に接続され、その電位を共用する。一方、電源スイッチ３０の押圧時閉成接点３０Ｂは、電源リレー５と並列に接続される。
【００７４】
従って、電源リレー５が開成して制御回路２が作動していない状態で、電源スイッチ３０が常時閉成接点３０Ａ側にあるときは、常時閉成接点３０Ａと制御回路２にＨｉｇｈ電位を与える端子１８は電源連動リレー３２により遮断され、交流電源４は電力を消費しない。また、動作していない制御回路２に電源リレー５の開閉を指示する制御信号が入力されることはない。
【００７５】
上記の状態から電源スイッチ３０を押圧し、押圧時閉成接点３０Ｂに切替えると、交流電源４が上記押圧時閉成接点３０Ｂを介し制御回路２へ接続される。制御回路２が動作状態になると、電源リレー制御コイル１５へ信号を出力し、電源リレー５および電源連動リレー３２を閉成させる。この場合、制御回路２への電源供給の時間的遅れ等の原因で、制御回路２がまだ正常に動作していない状態で電源スイッチ３０が常時閉成接点３０Ａへ復帰しても、この状態では電源連動リレー３２は開成しているので、電源スイッチ３０は回路から遮断されており、正常に動作していない制御回路２に検出回路１４から電位信号が入力することはなく、制御回路２に悪影響を与えることはない。
【００７６】
電源リレー５、電源連動リレー３２が閉成し、制御回路２が動作中は常時閉成接点３０Ａ、電源連動リレー３２、ダイオード２８、抵抗２９、３１は、交流電源４に対して直列に接続され、ダイオード２８の方向に従う電流が流れている。この直列に接続された回路に電流が流れると、抵抗３０、３１により電圧降下が生じ、制御回路２には端子１８のＨｉｇｈ電位よりも低い電位が入力され、電源リレー制御コイル１５を駆動状態にして、電源リレー５および電源連動リレー３２を閉成し、負荷回路１および制御回路２を作動状態に保つ。
【００７７】
また、上記状態から電源スイッチ３０の押圧により、該電源スイッチ３０が押圧時閉成接点３０Ｂへ切替えられると、ダイオード２８および抵抗２９、３１より成る直列回路は交流電源４より遮断され、上記直列回路への電流の流入もなくなる。その結果、制御回路２へは抵抗３１を介しＨｉｇｈ電位の信号が端子１８より供給され、電源リレー制御コイル１５を介し電源リレー５を開成し、負荷回路１および制御回路２への電源の供給を遮断する。
【００７８】
即ち、電源スイッチ３０の開閉は上記直列回路、即ち電源スイッチ３０の開閉を検出する検出回路１４により、電源スイッチ３０が押圧されて押圧時閉成接点３０Ｂが閉成した際に供給されるＨｉｇｈ電位、あるいはそれよりも低い電位である常時閉成接点３０Ａが閉成した際に供給されるＬｏｗ電位の電気信号が、制御回路２に伝えられる。従って、制御回路２はこの信号に基づき電源リレー５の開閉を制御して、負荷回路１および制御回路２への電力の供給を制御する。また、制御回路２に供給する電源リレー５の開閉制御のための開閉信号は、制御回路２が正常に動作し、電源連動リレー３２が閉成しているときだけ供給できるようになっているので、制御回路２を保護することができる。
【００７９】
図９は本発明のフローチャートである。以下、このフローチャートを用いて電源スイッチ３の開閉と電源リレー５の開閉動作を説明する。ステップＳ１で電源スイッチ３、３０を押圧するとステップＳ２で制御回路２が動作を開始し、ステップＳ３で電源リレー５を閉成する。次にステップＳ４で電源スイッチ３の開閉を判断し、閉成ならば開成信号を待つステップへ再び戻り、開成ならば次のステップＳ５の移り、電源スイッチ３、３０が開いているとステップＳ６に進み、洗濯工程のスタート指示を受けつける。尚、このステップＳ６が一定時間続くと、図示していないが電源リレー５を開成する制御を加え、オートオフ機能を設けてもよい。
【００８０】
上記のステップＳ５で電源スイッチ３、３０が閉成していることを示す閉成信号の入力が行われると、開成信号を待つステップＳ１５へ移行し、開成信号が入力されればステップＳ１０で電源リレー５を開成させる。また洗濯工程のスタート指示が制御指示装置１２で行われると、一連の洗濯工程が開始されるステップＳ７へ移る。
【００８１】
ステップＳ８で洗濯工程を実行中に電源スイッチ３、３０を閉成する閉成信号が入力されると、制御回路２はまずステップＳ１４で負荷制御素子群１１の制御により負荷回路１の停止を行う。そして、次にステップＳ１５で電源スイッチ３、３０が開成したことを示す開成信号が入力されるのを待ち、この開成信号が入力されるとステップＳ１０で電源リレー５を開成させる。
【００８２】
ステップＳ８で電源スイッチ３、３０が開成していることを検出すると、次のステップＳ９に進み、洗濯工程が終了したか否かを判断する。洗濯工程が全て終了した場合は、ステップＳ１０に進み電源リレー５を開成させる。電源リレー５を閉成させた後は、通常ならば交流電源４と制御回路２が遮断され、制御回路２は動作を停止するが、電源リレー５の閉成直後は制御回路２自身の大容量コンデンサ等の自己放電で短い時間であるが動作状態を保持する。従って、電源リレー５の開成後も電源スイッチ３、３０の開閉を検知することができ、この間に電源スイッチ３、３０を閉成し、閉成信号が入力されると、再び電源リレー５を閉成させることになる。
【００８３】
しかし、電源リレー５を開成してから制御回路２が動作を保てる時間は、一般的に長くても１秒程度である。従って、通常では電源リレー５を開成してから、例えば１分間も制御回路２が動作を保つことはない。１分間も動作を保っているということは、電源リレー５の接点が溶着して開成していない等の回路の故障がおきている場合に限られる。この回路故障を使用者に報知できるようにするため、ステップＳ１０で電源リレー５の開成を確認後、ステップＳ１１で電源スイッチ３、３０の開成状態を確認し、この状態が一定時間、例えば１分間経過してもまだ制御回路２が作動しているときは、表示装置１３により異常表示を行うステップＳ１３を設けている。
【００８４】
以上の説明は本発明を洗濯機に適用した場合について述べたが、一般の電気機器は勿論のこと、ＡＶ機器等の電子機器にも同様に適用することができる。また、上記の各実施形態では電源に交流電源を用いたものを示しているが、直流電源でも同様に実施することができる。
【００８５】
【発明の効果】
本発明は以上の構成であるので、電源投入時は電源スイッチを介し制御回路に通電し、その後は制御回路によって制御される電源リレーにより通電を保持し、制御回路により負荷の動作プログラムが終了すると、電源リレーを開成して負荷および制御回路へのすべての電源を遮断するので、待機電力をゼロにすることができる。また、制御回路動作中の使用者による電源の遮断も、上記電源スイッチの押圧で行わせることができる。即ち、１個の電源スイッチで使用者は電源のＯＮ動作とＯＦＦ動作を行わせることができ、その切替動作後の電力消費をゼロにすることができる。従って、スイッチの構成が簡潔になり、操作性の優れた機器を提供することができる。
【００８７】
また、電源スイッチには極めて汎用的な一接点のものを使用できるため、部品コストを安価にでき、ひいては機器のコスト低減を図ることができる。
【００８８】
また、本発明によると、電源スイッチの開閉状態を検出する回路に電源リレーを連動する電源連動リレーを設けているので、制御回路の不動作時にこの制御回路に電源スイッチの開閉状態を示す不安定な信号の入力を制御することができ、上記制御回路の不動作時における誤動作を防止することができる。
【００８９】
また、本発明によれば、電源スイッチが押圧され制御回路が動作し、電源リレーを閉成した後、また継続的に電源スイッチが押圧されていても、電源スイッチの閉成信号を受けないようにしているので、電源リレーは閉成して状態を保持することができ、電源スイッチの押圧継続により電源リレーが開成して、再び電源を開成状態に戻してしまうという誤動作を防止することができる。
【００９０】
また、本発明によると、電源リレー手段の閉成時に電源スイッチ手段を押圧して、制御手段に電源スイッチ手段の閉成信号が入力されてこの押圧状態が継続されていても、電源スイッチ手段の開成信号が入力されるまでは、電源リレー手段を開成しないので、電源スイッチ手段の閉成信号入力後、即電源リレー手段を開成し、また再び電源スイッチ手段の閉成信号を受けつけ、電源リレー手段を閉成し、電源入力状態に戻ってしまうという誤動作を防止することができる。
【００９１】
また、本発明によると、電源リレー手段の閉成時に電源スイッチ手段の閉成信号が入力すると、洗濯モータ等の負荷は即停止するので、使用者にとって安全な機器を提供することができる。
【００９２】
また、本発明によると、電源リレー手段を開成させるべく制御を行ってから一定時間経過しても制御回路が動作しているときは、表示手段により異常報知を行うので、電源リレー手段の接点溶着等による故障で、電源リレー手段が常に閉成している状態となった場合、使用者に故障を知らせることができ、使用者は即故障への対応が可能になる。また、電源リレー手段の故障による無駄な消費電力の発生を制御することができる。
【図面の簡単な説明】
【図１】本発明の第１の実施形態のブロック図である。
【図２】本発明の第２の実施形態のブロック図である。
【図３】本発明の第３の実施形態のブロック図である。
【図４】本発明の第４の実施形態のブロック図である。
【図５】本発明の第５の実施形態のブロック図である。
【図６】本発明の第６の実施形態のブロック図である。
【図７】本発明の第７の実施形態のブロック図である。
【図８】本発明の第８の実施形態のブロック図である。
【図９】本発明のフローチャートである。
【図１０】従来例のブロック図である。
【符号の説明】
１負荷回路
２制御回路
３電源スイッチ
４交流電源
５電源リレー
１２制御指示装置
１３表示装置
１４検出回路
１５電源リレー制御コイル
１６、２５、２７、２９、３１抵抗
１９、２６ホトカプラ
２０、２１、２２電源制限用抵抗
２３、２４、２８ダイオード
３２電源連動リレー
３０Ａ常時閉成接点
３０Ｂ押圧時閉成接点[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device or an electric device such as an AV device or a washing machine provided with a power supply control circuit.
[0002]
[Prior art]
Conventionally, as a power supply control device for a washing machine, a technique as disclosed in Japanese Patent No. 2523798 is known. This is because when the power plug is inserted into the outlet, the AC power supply is connected to the control circuit and the control circuit is in an operating state, and then the relay contact provided between the load circuit and the AC power supply is closed by an operation start instruction, AC power is supplied. When the automatic power-off at the end of operation or the power-off is instructed by the user, the relay contact is opened by the control circuit and the supply of AC power to the load circuit is cut off, but the power plug is connected to the control circuit. It is configured to continue to supply AC power unless it is unplugged.
[0003]
  Further, as shown in FIG. 10, when the load circuit 1 is operated,Alternating currentSome switches 6 are provided with a switch 6 forcibly cutting off the supply of the power supply 4. When the power switch 3 is pressed and closed, the AC power supply 4 is connected to the control circuit 2, and the control circuit 2 is in an operating state. As a result, the control circuit 2 closes the power supply relay 5 and supplies the AC power supply 4 to the control circuit 2 even when the power supply switch 3 is opened, so that the power supply relay 5 is self-held to the control circuit 2 and the load circuit 1. The AC power supply 4 is continuously supplied.
[0004]
At the end of a series of washing operations, the control circuit 2 opens the power supply relay 5 to automatically shut off the supply of the AC power supply 4 to the control circuit 2 and supply the AC power supply 4 to the load circuit 1. Cut off. When the supply of the AC power supply 4 is cut off during the operation of the load circuit 1, the switch 6 is pressed and closed to give an instruction to cut off the power supply to the control circuit 2, and the control circuit 2 turns the power supply relay 5 on the basis of the instruction. Establish.
[0005]
[Problems to be solved by the invention]
In the conventional example disclosed in Japanese Patent No. 2523798, the power can be turned on and off with a single switch. However, the AC power is supplied to the control circuit even when the power is turned off after the operation is completed. As a result, it continues to consume a small amount of power. In recent years, electric appliances such as washing machines in general households have built-in microcomputers, and these devices generate standby power with power consumption just by being connected to a power source, and the total becomes a value that cannot be ignored. Is coming. Considering the future shortage of power supply, it is necessary to reduce the standby power as described above in order to reduce energy consumption.
[0006]
Further, in the conventional example shown in FIG. 10, the standby circuit is zero because the control circuit is cut off from the AC power supply by the power relay during standby, but the configuration is turned on for power ON / OFF control. Therefore, it is necessary to separately provide a switch for turning off the power and a switch for turning off the power source, resulting in an increase in operation switches. Such an increase in the number of operation switches not only increases the space for the operation unit of an electric device such as a washing machine, increases the size of the switch unit and increases the cost of the control device, but also complicates the operation. It is difficult to use and feels inconvenient.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic or electrical device provided with a power supply control device that is inexpensive and has good operability while eliminating power consumption during standby of an electronic or electrical device such as a washing machine. And
[0008]
[Means for Solving the Problems]
  To achieve the above objective,The present inventionThe electronic or electrical equipment is a load circuit of the electronic or electrical equipment bodyAnd the load circuit connected in parallel to the load circuitControl means for controlling the control means, instruction means for instructing the control means of the control state of the load circuit, display means for displaying the instruction state of the instruction means, and power switch means connected in series to the load circuitAnd power relay means provided in parallel with the power switch means,Series circuit of load circuit and power switch means in series with power supplyInIn an electronic or electrical device that is intended to be connected,Detecting means for detecting an open / closed state of the power switch means, an input terminal of a photocoupler is connected between a load side terminal of the power switch means and a load side terminal of the power relay means, and the power switch means and the photocoupler Is connected to the power supply terminal on the side to which the power switch means and the power relay means are not connected via a resistor, and an output signal derived from the output terminal of the photocoupler is connected to the detection means. As a detection signal, and based on the detection signal,Provided is a relay control means for controlling the power relay means with a control signal derived from the control means, and the relay control means closes the power relay means and closes the power switch means when the power relay means is open. When this is done, the power relay means is closed and this state is maintained, and when the power relay means is closed and the power switch means is closed, the power relay means is opened. It is characterized by that.
[0009]
When the power supply relay means is opened and the power supply switch means provided in parallel to the power supply relay means is closed, that is, pressed, the AC power supply is energized to the control means, and the control means is activated. When the control means starts operation, the power relay means is closed, and even if the power switch means is returned to the opened state, the AC power supply is connected to the control means via the contact of the power relay means, so the power relay The contact of the means is self-held until a signal for opening the power relay means is issued by the control means. Therefore, even if the power switch is once closed and then opened, the control circuit can maintain the operation, and the load circuit can be energized and operated by a command or the like instructed to the control means by the instruction means. Become. The command or the like instructed by the instruction unit is displayed on a display unit provided on an operation panel or the like of the device main body.
[0010]
When the power switch means is pressed and closed during the operation of the control means, a detection signal for detecting the closing of the power switch means is transmitted to the control means from the detection means for detecting opening and closing of the power switch means, and the control means A signal for opening the relay means is output to open the power supply relay means. When the control means detects the closing of the power switch means after outputting the signal to open the power relay means, the signal is output again to close the power relay means and the power relay means is closed. Let With the above operation, the power relay means can be opened and closed with a single power switch.
[0016]
  Also,When the power switch means is pressed and closed while the power relay means is open, the power supply is connected to the control means via the power switch means, and the control means closes the power relay means and connects the power supply to the load circuit. In this state, even if the power switch means is released and the power switch is opened, the control means is connected to the power source via the power relay means. Self-maintain operating state. In this state, the photocouplerAntiTherefore, the detection signal is supplied from the detection means to the control means.Be.
[0017]
  When the power switch means is closed while the power relay means is closed, no voltage is applied to the input terminal of the photocoupler, and the photocoupler does not derive an output. The detection means detects this and transmits it to the control means, and opens the power relay means to control the control means and the load.circuitTurn off the power.
[0018]
  In this case, the power switch means can be formed as a detection means for detecting opening / closing of the power switch means with one contact. If the power switch means is opened while the power relay means is closed, the photocoupler inputTerminalOn the side through a resistorElectricCurrent flows from the power source, but when the power switch means is closed, the current flows to the power switch means.TerminalNo longer flows to the side. This current change is the output of the photocoupler.TerminalDetected by the detection means, the control means is notified of the opening / closing of the power switch.
[0019]
  The present inventionThe electronic or electrical equipmentA load circuit of an electronic or electric device main body, control means connected in parallel to the load circuit to control the load circuit, instruction means for instructing the control means of the control state of the load circuit, and Display means for displaying an instruction state, power switch means connected in series to the load circuit, power relay means provided in parallel with the power switch means, and a power supply for the series circuit of the load circuit and power switch means In an electronic or electrical device that is connected in series, the detection means for detecting the open / closed state of the power switch means,A photocoupler input terminal is connected between the power supply side terminal of the power supply switch means and the power supply side terminal of the power supply relay means, and the load side terminals connected to each other of the power supply switch means and the power supply relay means are connected with resistors. Via the power switch meansandPower relay handStepsUnconnected power supplyofConnected to the terminal and the output signal derived from the output terminal of the photocouplerAnd a relay control means for controlling the power supply relay means with a control signal derived from the control means based on the detection signal, and providing the power supply relay means with the power supply relay means by the relay control means. When the power switch means is closed while the relay means is open, the power relay means is closed and this state is maintained, and when the power switch means is closed and the power switch means is closed The power relay means is opened.It is characterized by that.
[0020]
When the power switch means is closed while the power relay means is open, an AC power supply is connected to the control means via the power switch means, and the power relay means is closed. Even if the power switch means is released in this state and the power switch means is opened, the power relay means is self-held by the control means and remains closed. At this time, the photocoupler is disconnected from the power supply by opening the power switch means.
[0021]
In the above state where the power supply relay means is closed and the power supply is connected to the control means and the load circuit, when the power supply switch means is pressed and closed, current flows to the input terminal of the photocoupler via the power supply switch means. The output signal is derived from the output terminal of the photocoupler, and this output signal is transmitted to the control means via the detection means. Therefore, the control means detects a change in the signal from the detection means, and opens the power relay means based on this signal change. After that, the initial state is restored by opening the power switch by releasing the pressure.
[0022]
  The present inventionThe electronic or electrical equipmentThe above configurationIn the electronic or electrical apparatus, a current limiting resistor for limiting a current to the photocoupler is provided in parallel with the input terminal of the photocoupler.
[0023]
Since the current limiting resistor is provided in parallel with the photocoupler, it is possible to prevent a large current from flowing through the input terminal of the photocoupler and to protect the input terminal of the photocoupler.
[0024]
  The present inventionThe electronic or electrical equipmentA load circuit of an electronic or electric device main body, control means connected in parallel to the load circuit to control the load circuit, instruction means for instructing the control means of the control state of the load circuit, and Display means for displaying an instruction state, power switch means connected in series to the load circuit, power relay means provided in parallel with the power switch means, and a power supply for the series circuit of the load circuit and power switch means In an electronic or electrical device that is connected in series, the detection means for detecting the open / closed state of the power switch means,A first diode is provided between a load-side terminal of the power switch means and a load-side terminal of the power relay means; a connection point between the first diode and a load-side terminal of the power switch means; A series circuit of an input terminal of the photocoupler, a resistor, and a second diode is connected between the power supply switch means and the power supply terminal to which the power supply relay means is not connected. Connected so that it does not flow to the diode 1 and from the output terminal of the photocouplerA relay control means is provided for deriving an output signal derived as a detection signal of the detection means and controlling the power relay means with a control signal derived from the control means based on the detection signal, the relay control means When the power relay means is closed when the power relay means is open, the power relay means is closed and this state is maintained, and the power relay means is closed. When the power switch means is closed, the power relay means is opened.It is characterized by that.
[0025]
Therefore, when the power switch means is open and the power switch means is pressed and closed, an AC power supply is connected to the control means via the power switch means, the control means is in operation, and the power relay means is closed. The AC power supply is connected to the load circuit and the control means via the power supply relay means.
[0026]
When the power switch means is closed, a current flows through the photocoupler via the power switch means and the second diode, and a detection signal indicating the closed state of the power switch means is supplied from the detection means to the control means. However, the control means does not operate with this detection signal. In this state, when the power switch means is released and the power switch means is opened, an AC power supply is connected to the control means via the power relay means, so that the power relay means is held in the open state. However, no current flows through the photocoupler due to the first and second diodes, and the output of the detection means is lost.
[0027]
When the power switch means is pressed and closed again with the power relay means closed, no current flows through the first diode, and current begins to flow through the second diode and the photocoupler. The detection means detects this and supplies a detection signal to the control means, and the control means opens the power relay means to cut off the supply of power to the load circuit and the control means.
[0028]
  The present inventionThe electronic or electrical equipmentA load circuit of an electronic or electric device main body, control means connected in parallel to the load circuit to control the load circuit, instruction means for instructing the control means of the control state of the load circuit, and Display means for displaying an instruction state, power switch means connected in series to the load circuit, power relay means provided in parallel with the power switch means, and a power supply for the series circuit of the load circuit and power switch means In an electronic or electrical device that is connected in series, the detection means for detecting the open / closed state of the power switch means,The power switch means comprises a switch whose load side contact is a normally closed contact and a closed contact when pressed, and the closed contact when pressed is connected to a load side terminal of the power relay means, and the normally closed And the power switch means and power relayStepsA relay contact that opens and closes in conjunction with the power relay means, a series circuit of a diode and a resistor is provided between the terminal of the power source on the unconnected side, and a voltage divided by the resistor is provided.Provided as a detection signal of the detection means is a relay control means for controlling the power supply relay means with a control signal derived from the control means based on the detection signal, and the power supply relay means is provided by the relay control means. When the power switch means is closed while the power relay means is open, the power relay means is closed and this state is maintained, and the power switch means is closed when the power relay means is closed. When closed, the power relay means was opened.It is characterized by that.
[0029]
Therefore, when the power switch means is pressed in the open state, the normally closed contact of the power switch means is opened, and the closed contact is closed when pressed. The power source is connected to the opening control means via the closed closing contact when pressed, and the control means is put into an operating state to close the power relay means and the relay contact linked to the power relay means.
[0030]
Therefore, even after the power switch means is released and the power switch means is opened, the control means and the load circuit are connected to the power supply via the power relay means. The relay contact that is linked to is kept closed. In this state, current flows to the diode via the normally closed contact of the power switch means and the relay contact, and the detection signal is output from the detection means and input to the control means.
[0031]
Next, when the power switch means is pressed again, the normally closed contact of the power switch means is opened. Therefore, no current flows through the diode, and the detection means does not derive the output signal that has been derived. The control means opens the power relay means and the relay contact linked thereto in response to the change in the detection signal from the detection means, returns to the initial state, and then prevents the detection of the pressing of the power switch means by the detection means. .
[0032]
  As described above, when the power switch means is switched from the normally closed contact to the closed contact when pressed when the power relay means is opened, the closed contact when pressed is passed to the control means., ElectricDetection is performed to detect the opening and closing of the power switch means, the control means, and the power switch means until the control means operates normally and the relay contacts linked to the power relay means and the power relay means are closed. It is electrically separated from the means.
[0033]
While the power relay means is closed, the detection means for detecting opening and closing of the power switch means and the power switch means means are connected by closing a relay contact that is linked to the power relay means. When the power switch means is connected to the normally closed contact, the detecting means is connected to one end of the AC power supply via the normally closed contact of the power switch means, and the power switch means is connected to the closed contact when pressed. If it is, it is cut off from the AC power source. A change in current due to the presence / absence of the input of the AC power supply is detected by the detecting means, and the control means is informed of opening / closing of the power switch means.
[0034]
  The present inventionThe electronic or electrical equipmentThe above configurationIn electronic or electrical equipmentAbove power supplyWhen the power relay means that is not connected to the control means is opened, the power switch means is closed to the control means.Above power supplyAfter supplyingthe aboveUntil the detection of the opening of the power switch means by the detection means, the control meansthe aboveIt is characterized by not accepting the detection signal.
[0035]
  Therefore, when the power relay means is opened, the power switch means is pressed to the control means.Above power supplyIf the control means starts operating normally and the power relay means is closed and the power switch means is in the closed state, the control means determines that this is invalid, and the power relay The means is kept closed. That is, when the power supply switch means is kept closed when the power supply relay means is closed, the power supply relay means is not recognized as being closed when the power supply relay means is closed. Prevent the opening.
[0036]
  The present inventionThe electronic or electrical equipmentThe above configurationIn electronic or electrical equipmentAbove power supplyWhen the power relay means to which the control means is connected is closed,the aboveEven if the closing of the power switch means is detected by the detection means, the control means keeps the power relay means in the closed state, and then when the return to the opening of the power switch means is detected by the detection means, the control means Opened the power relay means.
[0037]
  When closing the power supply relay means and closing the power supply switch means to open the power supply relay means, after the power supply switch means is pressed closed, the pressure is released and the power supply switch means is opened. This is detected by the detection means.signalTo open the power relay means.
[0038]
Therefore, when the power relay means is opened by the signal of closing of the power switch means detected by the detecting means when the power switch means is continuously pressed, the power relay means is again driven by the opening of the power relay means and the closing signal of the power switch means. However, since the opening of the power supply relay means is detected by detecting the opening of the power switch means after the pressure is closed, the power supply relay means is opened.
[0039]
  The present inventionThe electronic or electrical equipmentThe above configurationIn electronic or electrical equipmentAbove power supplyWhen the power relay means to which the control means is connected is closed,the aboveWhen the detection means detects the closing of the power switch means, the control meansStop the circuitThe power supply relay means is adapted to maintain a closed state.
[0040]
When the power relay means is closed by pressing and closing the power switch means when the power relay means is closed, when the detection means for detecting the opening and closing of the power switch means detects the closing of the power switch means, The supply of power is immediately stopped and the power relay means is kept closed. Therefore, it is possible to cope with the case where the operation of the load circuit has to be stopped immediately according to the user's instruction, for example, when the load circuit is a motor of a washing machine.
[0041]
  The present inventionThe electronic or electrical equipmentThe above configurationIn the electronic or electrical equipment, when the power relay means is to be opened by the control means and the power relay means is not opened after the elapse of a predetermined time, the control means determines that it is abnormal. Closing power relay meansKeep stateThe control is switched to let the display means notify the abnormality.
[0042]
Therefore, for example, when the control means is controlling to open and close the power relay means due to a failure such as welding of the power relay contact, the control means determines that this is abnormal when the AC power is continuously supplied for a certain period of time. Then, the display is displayed on the display device, and the control is switched to the control for keeping the power supply relay means in the closed state, and the display is continued. As a result, it is possible to easily notify a failure that is difficult for the user to notice, and to eliminate standby power consumption due to an abnormality.
[0043]
[Embodiments of the Invention]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0044]
(Embodiment 1)
FIG. 1 is a block diagram of Embodiment 1 in which the present invention is applied to a washing machine. Portions corresponding to the conventional example shown in FIG. In FIG. 1, the load circuit 1 includes a load 10 including a drain valve 7, a water supply valve 8, and a washing machine motor 9, and a load control element group 11 that controls the load 10. In the figure, 12 is a control instruction device for instructing the control state of the load to the control circuit 2, 13 is a display device for displaying the control state of the washing machine instructed by the control instruction device 12, and 14 is a power source. A detection circuit 15 for detecting the open / closed state of the switch 3 is a power relay control coil 15 for controlling the power relay 5 to open / close by a control signal from the control circuit 2.
[0045]
Therefore, according to the configuration shown in FIG. 1, when the power switch 3 composed of a pushbutton switch is pressed, the power switch 3 is closed, and the AC power supply 4 is connected to the control circuit 2 so that the control circuit 2 is in an operating state. To do. When the control circuit 2 starts to operate, a signal is supplied from the control circuit 2 to the power relay control coil 15 to close the power relay 5, and the power relay 5 is closed.
[0046]
When the power relay 5 is closed, the pressing of the power switch 3 is released, and the AC power 4 is supplied to the control circuit 2 and the load circuit 1 via the power relay 5 even when the power switch 3 returns to the open state. . The closed state of the power supply relay 5 as described above is self-held until a signal for opening the power supply relay 5 is output from the control circuit 2 to the power supply relay control coil 15.
[0047]
Therefore, once the power switch 3 is closed, the control circuit 2 can maintain the operating state even if the power switch 3 is subsequently opened, and the control circuit 2 controls the load circuit control element group 11 to operate the load 10. In addition, input from the control instruction device 12 and output to the display device 13 are also possible, and a series of washing machine operations can be performed.
[0048]
  For example, a series of washing operations such as washing, rinsing, and dehydration are started and executed by the input from the control instruction device 12, and when all the processes are completed, the control circuit 2 opens the power relay 5 in the power relay control coil 15. Signal to output, power relay5Is established. Thereby, AC power supply 4 is interrupted by control circuit 2 and load circuit 1, and a series of washing operations are completed. And after this washing operation is completed, all the circuits are automatically disconnected from the AC power supply 4, so that the power consumption of the washing machine can be made zero.
[0049]
When the power switch 3 is closed during the operation of the control circuit 2, the detection circuit 14 that detects opening and closing of the power switch 3 detects this and transmits a detection signal to the control circuit 2. Upon receiving the detection signal, the control circuit 2 outputs a signal to open the power relay 5 to the power relay control coil 15 and opens the power relay 5. In this way, the control circuit 2 and the load circuit 1 can be disconnected from the AC power source 4 at any time by the closing operation of the power switch 3 by the user. After the AC power source 4 is disconnected, the power consumption of the washing machine is zero. Can be.
[0050]
Therefore, according to the first embodiment of the present invention described above, the AC power supply 4 can be turned on or off with the load circuit 1 and the control circuit 2 only by providing one power switch 3, and when the power is OFF. Standby power can be reduced to zero.
[0051]
(Embodiment 2)
  FIG. 2 is a block diagram of the second embodiment of the present invention. The parts corresponding to those in FIG. 2 differs from FIG. 1 in that the power switch 3 and the power switch open / close detection circuit 14 are specifically shown as an embodiment. In FIG. 2, the power switch 3 is a two-circuit switch having two contacts 3a and 3b that open and close in conjunction with each other. The contact 3a is connected in parallel with the power relay 5, and the other contact 3b isThe detection circuit 14 that detects the opening and closing of the power switch 3 is configured by a circuit that is connected to the resistor 16 and includes the resistor 16 and the contact 3b.The detection circuit 14 supplies a signal for controlling opening / closing of the power supply relay 5 from both ends of the resistor 16 to the control circuit 2.
[0052]
  That is, when the power switch 3 is pressed, the contacts 3a and 3b are closed, and the contact 3a serves to supply the AC power supply 4 to the control circuit 2 and operate the control circuit 2 when the power supply relay 5 is open. Happen. When the contact 3b is closed, a low potential is applied to the control circuit 2 via the resistor 16.The low potential by the terminal 17 givingThat is, a detection signal indicating the closed state of the power switch 3 is transmitted, and the power relay 5 is closed via the power relay control coil 15.
[0053]
  When the pressing of the power switch 3 is released, the contact 3b is opened, and the control circuit 2 is connected to the high potential via the resistor 16 of the detection circuit 14.High potential by the terminal 18 forThat is, a detection signal indicating the open state of the power switch 3 is transmitted. That is, the opening / closing of the power switch 3 is derived as an electrical signal of Low potential (power switch closed) and High potential (power switch open) from the detection circuit 14 that detects opening / closing of the power switch 3, and is supplied to the control circuit 2. . Accordingly, in response to this signal, the control circuit 2 supplies the power relay control coil 15 with the same control signal as in FIG. 1 to control the opening and closing of the power relay 5.
[0054]
(Embodiment 3)
FIG. 3 is a block diagram of Embodiment 3 of the present invention, and the same reference numerals are given to portions corresponding to FIG. 2, and description thereof is omitted. 3 differs from FIG. 1 and FIG. 2 in that a circuit composed of a photocoupler that detects the open / close state of the power switch 3 is provided. In FIG. 3, the power switch 3 is connected in series with the input side terminal of the photocoupler 19 and the current limiting resistor 20, and this series circuit is connected to the power relay 5 in parallel.
[0055]
  Further, a connection point between the current limiting resistor 20 and the power switch 3 is connected to a terminal of the AC power source 4 on the opposite side to the side where the power relay 5 is connected via the current limiting resistor 21. The output terminal of the photocoupler 19 has a resistor 16And a detection circuit 14 for detecting the opening and closing of the power switch 3 is configured by a circuit including the resistor 16, the current limiting resistor 21, and the photocoupler 19.When the power switch 3 is pressed and closed when the power relay 5 is opened, the AC power supply 4 is connected to the control circuit 2 through the power switch 3, the current limiting resistor 20, and the input terminal of the photocoupler 19. To the operating state. As a result, the power supply relay control coil 15 is activated to hold the power supply relay 5 by itself.
[0056]
  The power relay 5 is closed and the control circuit 2 is opened when the power switch 3 is released during operation.BeThe AC power supply 4 is connected to the input terminal of the photocoupler 19 via the power relay 5 and current limiting resistors 20 and 21.Input terminalA current flows through. When a current flows through the input terminal of the photocoupler 19, the signal becomes an optical output.Of photocoupler 19Output terminalSideThis is transmitted to the phototransistor, and the phototransistor is turned on. When the phototransistor is turned on, the control circuit 2 has a low potential.The low potential by the terminal 17 givingIs supplied, the power relay control coil 15 is kept in the operating state, and the power relay 5 is kept in the closed state.
[0057]
  When the power relay 5 is closed and the power switch 3 is pressed and closed while the control circuit 2 is in operation, the current flowing through the photocoupler 19 and the current limiting resistor 20 is passed through the power switch 3. Therefore, no current flows through the input terminal of the photocoupler 19. Therefore, the output of the photocoupler 19TerminalThe phototransistor provided on the side is turned off, and the control circuit 2 has a high potential through the resistor 16.High potential by terminal 18 providingIs applied to open the power relay 5 via the power relay control coil 15.
[0058]
That is, the opening / closing of the power switch 3 is converted into an electrical signal of Low potential (power switch open) and High potential (power switch closed) by the detection circuit 14 that detects opening / closing of the power switch 3 and supplied to the control circuit 2. Is done. In response to this signal, the control circuit 2 supplies the power relay control coil 15 with the same control signal as in the embodiment shown in FIGS. 1 and 2 to control the opening and closing of the power relay 5.
[0059]
(Embodiment 4)
FIG. 4 is a block diagram of Embodiment 4 of the present invention, and the same reference numerals are given to portions corresponding to FIG. 3, and description thereof is omitted. 4 differs from FIG. 3 in that a current limiting resistor 22 is provided between the load relay contacts of the power relay 5 and the power switch 3, that is, in parallel with the series circuit of the input terminal of the photocoupler 19 and the current limiting resistor 20. That is, the other structure is the same as FIG.
[0060]
As shown in FIG. 4, when a current limiting resistor 22 is provided in parallel with the series circuit of the input terminal of the photocoupler 19 and the current limiting resistor 20, the power relay 5 and the power switch 3 are opened and closed to connect between the input terminals of the photocoupler 19. The current flowing through the current limiting resistor 20 can be suppressed in combination with the action of the current limiting resistor 20, and the destruction of the photocoupler due to the overcurrent can be more reliably protected.
[0061]
(Embodiment 5)
FIG. 5 is a block diagram of the fifth embodiment of the present invention. The parts corresponding to those in FIG. 5 differs from FIG. 3 in that an open / close detection circuit for the power switch 3 by the photocoupler 19 and the current limiting resistor 20 is provided on the load side of the power relay 5 and the power switch 3 in FIG. In FIG. 5, it is provided on the power source side, and the other configurations are the same.
[0062]
  When the power switch 3 is pressed and closed when the power relay 5 is opened, the power supply 4 is connected to the control circuit 2 and the load circuit 1, and the power relay 5 is closed by the control circuit 2. In this state, current flows through the input terminal of the photocoupler 19,Of photocoupler 19outputTerminalThe phototransistor on the side is closed. Then, when the power switch 3 is opened by releasing the power switch 3, the input of the photocoupler 19TerminalNo current flows to the phototransistorOFF stateHowever, the power supply relay 5 is self-held by the control circuit 2 and the load circuit 1Alternating currentThe power supply 4 is kept connected.
[0063]
  When the power switch 3 is closed again in the above state, a current flows to the input terminal of the photocoupler 19,Of photocoupler 19outputTerminalThe phototransistor on the side is closed. The detection circuit 14 detects the change of the phototransistor from OFF to ON with the resistor 16 and transmits this detection signal to the control circuit 2, and the control circuit 2 opens the power supply relay 5. As a result, the load circuit 1 and the control circuit 2 areAlternating currentIt is shut off from the power source 4.
[0064]
(Embodiment 6)
FIG. 6 is a block diagram of Embodiment 6 of the present invention, and the same reference numerals are given to portions corresponding to FIG. 6 differs from FIG. 5 in that a current limiting resistor 22 is provided in parallel with the power relay side contact of the power relay 5 and the power switch 3, that is, in parallel with the series circuit of the input terminal of the photocoupler 19 and the current limiting resistor 20. The other configurations are the same.
[0065]
As shown in FIG. 6, when a current limiting resistor 22 is provided in parallel with the series circuit of the input terminal of the photocoupler 19 and the current limiting resistor 20, the power relay 5 and the power switch 3 are opened and closed to connect between the input terminals of the photocoupler 19. The current flowing through the current limiting resistor 20 can be suppressed in combination with the action of the current limiting resistor 20, and the destruction of the photocoupler 19 due to the overcurrent can be more reliably protected.
[0066]
(Embodiment 7)
  FIG. 7 is a block diagram of the seventh embodiment of the present invention. The parts corresponding to those in FIG. In FIG. 7, the power switch 3 is connected in series with the diode 23, and this series circuit is connected in parallel to the power relay 5. The connection point between the cathode side of the diode 23 of the series circuit and the power switch 3 is the input terminal of the diode 24, the resistor 25 and the photocoupler 26.TheThe power supply relay 5 is connected to the terminal of the AC power supply 4 opposite to the side to which the power supply relay 5 is connected.
[0067]
  Input terminal of the photocoupler 26SideThe LED and the diode 24 are connected in the same direction, and the diode 23 is an input terminal of the photocoupler 26.SideThe LED and the diode 24 are connected in a direction in which no current flows, that is, a direction in which the current flowing in the LED and the diode 24 is blocked. The output terminal of the photocoupler 26 is connected in series with the resistor 27, and is connected to the control circuit 2 so as to form a series circuit between the terminal 18 for applying the High potential and the terminal 17 for applying the Low potential.
[0068]
When the power switch 3 is pressed and opened when the power relay 5 is opened, the AC power source 4 is connected to the control circuit 2 via the diode 23, and the control circuit 2 is brought into an operating state only by the AC half wave. As a result, the control circuit 2 drives the power relay control coil 15 to open the power relay 5. Thereafter, the control circuit 2 and the load circuit 1 hold the operating state with the normal AC full-wave via the power relay 5.
[0069]
  When the power supply relay 5 is closed and the control circuit 2 is in operation and the power switch 3 is released from being pressed, no current flows because the input terminal of the photocoupler 26 has the diode 23. When no current flows to the input terminal of the photocoupler 26, the phototransistor on the output terminal side of the photocoupler 26 is turned off, and the control circuit 2 is connected to the terminal 17 via the resistor 27.ThanThe low potential is transmitted, and the control circuit 2 drives the power relay control coil 15 to hold the power relay 5 in the closed state.
[0070]
  When the power relay 5 is closed and the power switch 3 is pressed and opened while the load circuit 1 and the control circuit 2 are in operation, the input terminal of the photocoupler 26 is connected to the resistor 25, the diode 24 and the power switch 3. Current will flow. When a current flows through the input terminal of the photocoupler 26, the signal is converted into an optical signal.Of photocoupler 26outputTerminalIs transmitted to the phototransistor on the side, and this phototransistor is turned on.
[0071]
  As a result, a high potential signal is sent to the control circuit 2 via the phototransistor.ThanThe control circuit 2 detects this, cuts off the supply of current to the power relay control coil 15, opens the power relay 5, and opens the power switch 3 to release the load circuit 1 and the control. The supply of the AC power supply 4 to the circuit 2 is cut off.
[0072]
  Open and close the power switch 3 as described aboveIsWhen the power supply switch 3 is turned on when the power supply relay 5 is opened when detected by the output circuit 14, a low potential signal is given to the control circuit 2, the power supply relay control coil 15 is driven to close the power supply relay 5, Even if the power switch 3 is opened, it is held by itself. When the power switch 3 is turned on when the power relay 5 is closed, a high potential signal is given to the control circuit 2, the current supply to the power relay control coil 15 is cut off, the power relay 5 is opened, and the load circuit 1 and the power supply to the control circuit 2 is cut off.
[0073]
(Embodiment 8)
  FIG. 8 is a block diagram of the eighth embodiment of the present invention. The parts corresponding to those in FIG. In FIG. 8, a power switch 30 is a switch having a normally closed contact 30A and a pressing closed contact 30B. The normally closed contact 30A is a power interlocking relay that operates in conjunction with the power relay 5 by the power relay control coil 15.32, The diode 28, the resistor 29, and the resistor 31 are connected to the terminal of the AC power supply 4 on the side opposite to the side to which the power supply relay 5 is connected. A terminal of the AC power supply 4 to which the power supply relay 5 is not connected is connected to a terminal 18 that gives a signal of a high potential to the control circuit 2 and shares the potential. On the other hand, the closing contact 30 </ b> B when the power switch 30 is pressed is connected in parallel with the power relay 5.
[0074]
  Accordingly, when the power supply relay 5 is opened and the control circuit 2 is not operating, and the power switch 30 is on the normally closed contact 30A side, a terminal for applying a high potential to the normally closed contact 30A and the control circuit 2 18 is a power interlock relay32The AC power supply 4 does not consume power. In addition, a control signal that instructs opening / closing of the power supply relay 5 is not input to the control circuit 2 that is not operating.
[0075]
  When the power switch 30 is pressed from the above state and switched to the closed contact 30B when pressed, the AC power supply 4 is connected to the control circuit 2 via the closed contact 30B when pressed. When the control circuit 2 is in an operating state, a signal is output to the power relay control coil 15, and the power relay 5 and the power interlocking relay are output.32Is closed. In this case, even if the power switch 30 returns to the normally closed contact 30A in a state where the control circuit 2 is not operating normally due to a time delay in power supply to the control circuit 2 or the like, Power interlock relay32Is open, so that the power switch 30 is disconnected from the circuit and the control circuit 2 is not operating normally.InspectedNo potential signal is input from the output circuit 14, and the control circuit 2 is not adversely affected.
[0076]
  Power relay 5, power interlock relay32Is closed and the control circuit 2 is in operation, the normally closed contact 30A and the power interlock relay32The diode 28 and the resistors 29 and 31 are connected in series to the AC power supply 4, and a current according to the direction of the diode 28 flows. When a current flows through the circuit connected in series, a voltage drop is generated by the resistors 30 and 31, and a potential lower than the High potential of the terminal 18 is input to the control circuit 2 to bring the power relay control coil 15 into a driving state. Power relay 5 and power interlock relay32Is closed, and the load circuit 1 and the control circuit 2 are kept in an operating state.
[0077]
When the power switch 30 is switched from the above state to the closed contact 30B when pressed, the series circuit including the diode 28 and the resistors 29 and 31 is cut off from the AC power supply 4, and the series circuit There is no current flow into the unit. As a result, a high potential signal is supplied from the terminal 18 to the control circuit 2 through the resistor 31, the power supply relay 5 is opened through the power supply relay control coil 15, and power supply to the load circuit 1 and the control circuit 2 is performed. Cut off.
[0078]
  That is, the power switch 30 is opened and closed by the above-described series circuit, that is, the detection circuit 14 that detects the opening and closing of the power switch 30 and the power switch 30 is pressed to close the closing contact 30B when pressed.Supplied whenHigh potential or lowerIs potentialThe normally closed contact 30A is closed.Supplied whenLow electric signalBut,This is transmitted to the control circuit 2. Therefore, the control circuit 2 controls the opening and closing of the power relay 5 based on this signal, and supplies the load circuit 1 and the control circuit 2 to the control circuit 2.Electric powerTo control the supply. In addition, the open / close signal for the open / close control of the power supply relay 5 supplied to the control circuit 2 operates normally when the control circuit 2 operates normally.32Since it can be supplied only when is closed, the control circuit 2 can be protected.
[0079]
FIG. 9 is a flowchart of the present invention. Hereinafter, the opening / closing operation of the power switch 3 and the opening / closing operation of the power relay 5 will be described with reference to this flowchart. When the power switches 3 and 30 are pressed in step S1, the control circuit 2 starts operating in step S2, and the power relay 5 is closed in step S3. In step S4, it is determined whether the power switch 3 is opened or closed. If it is closed, the process returns to the step of waiting for the opening signal. If it is opened, the process proceeds to the next step S5. Proceed to receive instructions for starting the laundry process. If step S6 continues for a certain period of time, although not shown, control for opening the power relay 5 may be added to provide an auto-off function.
[0080]
When the closing signal indicating that the power switches 3 and 30 are closed is input in step S5, the process proceeds to step S15 where the opening signal is awaited. If the opening signal is input, the power is supplied in step S10. The relay 5 is opened. When the start instruction of the washing process is performed by the control instruction device 12, the process proceeds to step S7 where a series of washing processes are started.
[0081]
  When a closing signal for closing the power switches 3 and 30 is input during the washing process in step S8, the control circuit 2 first loads the load in step S14.controlThe load circuit 1 is stopped by controlling the element group 11. Then, in step S15, it waits for an opening signal indicating that the power switches 3 and 30 are opened. When this opening signal is input, the power supply relay 5 is opened in step S10.
[0082]
When it is detected in step S8 that the power switches 3 and 30 are opened, the process proceeds to the next step S9, where it is determined whether or not the washing process is completed. When all the washing processes are completed, the process proceeds to step S10 and the power supply relay 5 is opened. After the power supply relay 5 is closed, the AC power supply 4 and the control circuit 2 are normally shut off and the control circuit 2 stops operating. However, immediately after the power supply relay 5 is closed, the control circuit 2 itself has a large capacity. The operation state is maintained for a short time due to self-discharge of the capacitor or the like. Therefore, it is possible to detect the opening and closing of the power switches 3 and 30 even after the power relay 5 is opened. During this time, the power switches 3 and 30 are closed, and when the closing signal is input, the power relay 5 is closed again. Will be completed.
[0083]
  However, the time that the control circuit 2 can keep operating after the power supply relay 5 is opened is generally about 1 second at the longest. Therefore, normally, the control circuit 2 does not keep operating for one minute after the power supply relay 5 is opened. The fact that the operation is maintained for one minute is limited to a case where a circuit failure has occurred, such as the contact of the power relay 5 is not welded and opened. In order to notify the user of this circuit failure, after confirming the opening of the power supply relay 5 in step S10, the opened state of the power switches 3 and 30 is confirmed in step S11. If the control circuit 2 is still operating after the passage, the display device13Step S13 for displaying an abnormality is provided.
[0084]
Although the above description has been given of the case where the present invention is applied to a washing machine, the present invention can be applied to not only general electric devices but also electronic devices such as AV devices. In each of the above embodiments, an AC power source is used as the power source, but a DC power source can be similarly implemented.
[0085]
【The invention's effect】
Since the present invention is configured as described above, when the power is turned on, the control circuit is energized through the power switch, and thereafter the energization is held by the power relay controlled by the control circuit, and the load operation program is terminated by the control circuit. Since the power relay is opened to shut off all power to the load and control circuit, standby power can be reduced to zero. Also, the user can shut off the power supply during operation of the control circuit by pressing the power switch. In other words, a single power switch allows the user to turn on and off the power, and can reduce power consumption after the switching operation to zero. Therefore, the configuration of the switch is simplified, and a device with excellent operability can be provided.
[0087]
  MaTheSince a power switch having a single general-purpose contact can be used, the cost of parts can be reduced, and the cost of equipment can be reduced.
[0088]
  In addition, the present inventionAccording to the above, since the power supply interlocking relay that links the power supply relay is provided in the circuit that detects the open / close state of the power switch, an unstable signal indicating the open / close state of the power switch is input to this control circuit when the control circuit is not operating. It is possible to control the malfunction of the control circuit when it is not operating.
[0089]
  Also,The present inventionAccording to the above, after the power switch is pressed and the control circuit operates to close the power relay, the power switch closing signal is not received even if the power switch is continuously pressed. The power relay can be closed and kept in the state, and the malfunction that the power relay is opened by continuing pressing of the power switch and the power is returned to the open state again can be prevented.
[0090]
  In addition, the present inventionAccording to the above, even if the power switch means is pressed when the power relay means is closed, and the closing signal of the power switch means is input to the control means and this pressing state continues, the opening signal of the power switch means is input Until the power relay means is not opened, the power supply relay means is opened immediately after the closing signal is input to the power switch means, and the power supply switch means is closed again to close the power relay means. Therefore, it is possible to prevent a malfunction of returning to the power input state.
[0091]
  In addition, the present inventionAccording to this, when the closing signal of the power switch means is inputted when the power relay means is closed, the load such as the washing motor is immediately stopped, so that a safe device for the user can be provided.
[0092]
  In addition, the present inventionAccording to the above, when the control circuit is operating even after a certain period of time has elapsed since the control to open the power relay means, the display means notifies the abnormality, so that the failure due to contact welding of the power relay means etc. When the power relay means is always closed, the user can be informed of the failure, and the user can immediately respond to the failure. In addition, it is possible to control generation of useless power consumption due to failure of the power relay means.
[Brief description of the drawings]
FIG. 1 is a block diagram of a first embodiment of the present invention.
FIG. 2 is a block diagram of a second embodiment of the present invention.
FIG. 3 is a block diagram of a third embodiment of the present invention.
FIG. 4 is a block diagram of a fourth embodiment of the present invention.
FIG. 5 is a block diagram of a fifth embodiment of the present invention.
FIG. 6 is a block diagram of a sixth embodiment of the present invention.
FIG. 7 is a block diagram of a seventh embodiment of the present invention.
FIG. 8 is a block diagram of an eighth embodiment of the present invention.
FIG. 9 is a flowchart of the present invention.
FIG. 10 is a block diagram of a conventional example.
[Explanation of symbols]
  1 Load circuit
  2 Control circuit
  3 Power switch
  4 AC power supply
  5 Power relay
12 Control instruction device
13 Display device
14Detection circuit
15 Power relay control coil
16, 25,27,29, 31    resistance
19, 26 Photocoupler
20, 21, 22 Power limiting resistor
23, 24, 28 Diode
32      Power interlock relay
30A Normally closed contact
30B Closed contact when pressed

Claims

A load circuit of an electronic or electric device main body, control means connected in parallel to the load circuit to control the load circuit, instruction means for instructing the control means of the control state of the load circuit, and Display means for displaying an instruction state, power switch means connected in series to the load circuit, power relay means provided in parallel with the power switch means, and a power supply for the series circuit of the load circuit and power switch means In electronic or electrical equipment that is connected in series with
Detecting means for detecting an open / closed state of the power switch means, an input terminal of a photocoupler is connected between a load side terminal of the power switch means and a load side terminal of the power relay means, and the power switch means and the photocoupler the connection point between the input terminal of via a resistor connected to the power supply terminal on the side where the power switch means and power relay means is not connected, the detecting means output signal derived from the output terminal of the photocoupler And a relay control means for controlling the power relay means with a control signal derived from the control means based on the detection signal. The relay control means causes the power relay means to When the power switch means is closed while the power relay means is open, the power relay means is closed and this state is maintained. The power supply when the relay means has closed the power switch means in the closed state, the power supply characterized collector terminal or electrical device that has been adapted to the relay means to the open state.

A load circuit of an electronic or electric device main body, control means connected in parallel to the load circuit to control the load circuit, instruction means for instructing the control means of the control state of the load circuit, and Display means for displaying an instruction state, power switch means connected in series to the load circuit, power relay means provided in parallel with the power switch means, and a power supply for the series circuit of the load circuit and power switch means In electronic or electrical equipment that is connected in series with
Detecting means for detecting an open / closed state of the power switch means, an input terminal of a photocoupler is connected between a power supply side terminal of the power switch means and a power supply side terminal of the power relay means, and the power switch means and the power supply the terminal of the load side connected to each other in the relay unit via the resistor connected to the power supply terminal on the side not the power switch means and a power supply relay hand stage is connected, an output derived from the output terminal of the photocoupler And a relay control means for controlling the power supply relay means by a control signal derived from the control means based on the detection signal, and deriving the signal as a detection signal of the detection means. When the power switch means is closed when the power relay means is open, the power relay means can be closed. Holding the state, the power source when the relay means has closed the power switch means in the closed state, the power supply characterized collector terminal or electrical device that has been adapted to the relay means to the open state.

3. The electronic or electrical device according to claim 1, further comprising a current limiting resistor for limiting a current to the photocoupler in parallel with the input terminal of the photocoupler.

A load circuit of an electronic or electric device main body, control means connected in parallel to the load circuit to control the load circuit, instruction means for instructing the control means of the control state of the load circuit, and Display means for displaying an instruction state, power switch means connected in series to the load circuit, power relay means provided in parallel with the power switch means, and a power supply for the series circuit of the load circuit and power switch means In electronic or electrical equipment that is connected in series with
Detecting means for detecting an open / closed state of the power switch means, a first diode is provided between a load side terminal of the power switch means and a load side terminal of the power relay means, the first diode and the Between the connection point of the power switch means to the load side terminal and the power supply terminal on the side where the power switch means and the power relay means are not connected, the input terminal of the photocoupler, the resistor and the second diode a series circuit, the current flowing in the second diode is connected to not flow to the first diode, the output signal derived from the output terminal of the photo coupler causes derived as a detection signal of the detection means, Based on the detection signal, a relay control means for controlling the power relay means with a control signal derived from the control means is provided, and the relay control means When the power switch means is closed when the power relay means is open, the power relay means is closed and this state is maintained. When the power relay means is closed, the power when closing the switch means, power supply you characterized collector terminal or electrical device that has been adapted to the relay means to the open state.

A load circuit of an electronic or electric device main body, control means connected in parallel to the load circuit to control the load circuit, instruction means for instructing the control means of the control state of the load circuit, and Display means for displaying an instruction state, power switch means connected in series to the load circuit, power relay means provided in parallel with the power switch means, and a power supply for the series circuit of the load circuit and power switch means In electronic or electrical equipment that is connected in series with
Detecting means for detecting an open / closed state of the power switch means, wherein the power switch means is constituted by a switch in which a load side contact is a normally closed contact and a pressed closed contact, and the pressed closed contact is the above power was connected to the load side terminal of the relay unit, and the normally closed contact, between the power supply terminal of said power switch means and a power supply relay hand stage is not connected side, in conjunction with the power supply relay means A series circuit of a relay contact and a diode and a resistor that opens and closes, and causes a voltage divided by the resistor to be derived as a detection signal of the detection means, and based on the detection signal, a control signal derived from the control means Relay control means for controlling the power supply relay means is provided, and the power supply relay means is operated by the relay control means when the power supply relay means is open. When the power relay means is closed, the power relay means is closed and this state is maintained. When the power relay means is closed and the power switch means is closed, the power relay means is opened. it characterized collector terminal or electrical device that has been so.

When opening the power relay means the power and control unit is not connected, then the power switch means is closed, and supplying the power to the control means, until it detects the opening of the power switch means by said detecting means, said control means, electronic or electrical device according to any one of claims 1 to 5, characterized in that it has not accepted the following the detection signal.

When closing of the power relay means the power and control unit is connected, even if closure of the power switch means is detected by said detecting means, the control means keeps the power relay means in the closed state, then the detection 7. The electronic or electrical device according to claim 1 , wherein the control means opens the power relay means when the return of the power switch means is detected by the means. machine.

When closing of the power relay means the power and control unit is connected, said detecting means, upon detection of a closing of the power switch means, the said control means stops the load circuit, power supply relay means closed The electronic or electrical device according to claim 7, wherein the completed state is maintained.

When the power supply relay means should be opened by the control means, if the power supply relay means is not opened after a predetermined time has elapsed, the control means determines that the power supply relay means is in an abnormal state. The electronic or electrical device according to any one of claims 1 to 8, wherein the control is switched to a control for maintaining the power and the display means is notified of the abnormality.