JP4055607B2

JP4055607B2 - Hot water heater

Info

Publication number: JP4055607B2
Application number: JP2003047308A
Authority: JP
Inventors: 慎治櫛田; 一郎奈須; 順一服部
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2003-02-25
Filing date: 2003-02-25
Publication date: 2008-03-05
Anticipated expiration: 2023-02-25
Also published as: JP2004257615A

Description

【０００１】
【発明の属する技術分野】
本発明は、貯湯式温水器の給湯制御に関するものである。
【０００２】
【従来の技術】
近年、台所等への一般給湯動作の他に、風呂装置にも多様な機能が求められている。例えば、設定水位まで自動的に湯水を落とし込む自動風呂湯張り機能、風呂湯水を好みの温度まで焚き上げる追い焚き機能、市水からの入水を一定量風呂に落とし込んで風呂湯水温度を低下させるぬるめ機能、加熱された湯水を一定量風呂に落とし込む足し湯機能等がある。そこで、上記の多様な機能に対応させるため、貯湯タンクからの出湯経路をとして２系統の給湯配管回路を設けることにより、一般給湯と風呂給湯を同時に使用できるようになっている（特許文献１参照）。
【０００３】
【特許文献１】
特開２００２−４８４０９号公報
【０００４】
【発明が解決しようとする課題】
しかしながら従来構成において、多様な機能を実現するために設けた２系統の給湯配管回路の混合弁、給湯温度センサ、流量センサーがメンテナンスやサービス時に誤接続された場合には必ずしも安全ではなかった。例えば、給湯混合弁と風呂混合弁が逆に接続された場合、風呂湯張り時には風呂混合弁は制御されず、給湯混合弁が間違って制御されることになり、風呂湯張り温度が設定湯温より低ければ給湯混合弁が湯側に動作してしまう。このような制御が行われた後に、給湯を行うと９０度近い熱湯がそのまま出湯されることになる。
【０００５】
また、給湯温度センサと風呂湯張り温度センサが間違って接続された場合、給湯時に給湯混合弁を制御しても給湯センサの温度は上昇せず、給湯混合弁はさらに湯側に制御され９０度近い熱湯が出湯されることになる。流量センサの場合も同様で、風呂湯張り時に給湯流量弁が流量検知するが、実際には給湯されていないので給湯温度センサの温度は低いままで給湯混合弁が湯側に制御されることになり、次に給湯されると給湯混合弁が湯側になっているため、９０度近い熱湯が出湯されることになる。
【０００６】
以上のように、給湯側と風呂側の部品が誤接続されると、設定した条件以外の条件で動作することになり、高温出湯など予想外の結果を招く恐れがある。
【０００７】
そこで本発明は、上記の如く故障や誤配線があった場合、素早く検知して安全側に動作させることで、予想外の高温出湯を防止し、安全な貯湯式温水器を提供することを目的としたものである。
【０００８】
【課題を解決するための手段】
本発明は上記課題を解決するために、貯湯タンクからの湯と水を混合して給湯する給湯混合弁と、給湯温度を検出する給湯温度センサと、給湯流量を検出する給湯流量センサからなる給湯配管回路と、前記貯湯タンクからの湯と水を混合して風呂湯張りをする風呂混合弁と、風呂湯張り温度を検出する風呂湯張り温度センサと、風呂湯張り流量を検出する風呂流量センサと注湯弁からなる風呂湯張り配管回路と、前記給湯配管回路と風呂湯張り回路の湯温をそれぞれ制御する制御装置とを備え、前記制御装置は、前記給湯温度センサもしくは前記風呂湯張り温度センサが設定温度より一定温度以上高い湯温を検出すると異常と判断し、前記給湯混合弁および前記風呂混合弁の両方の混合弁を水側に制御するように構成している。
【０００９】
上記発明によれば、給湯混合弁と風呂混合弁が逆に接続された場合、風呂湯張り時には、風呂混合弁は制御されず給湯混合弁が間違って制御され、風呂湯張り温度が設定湯温より低ければ給湯混合弁が湯側に動作してしまう。しかし、次に給湯を行うとき、給湯温度センサが設定温度より一定温度以上上昇したことを検知すると、両方の混合弁を水側に制御するので、熱いお湯がそのまま出湯されるのを防ぐことができる。また、給湯温度センサと風呂湯張り温度センサが逆に接続された場合、給湯時に給湯混合弁を制御しても給湯センサの温度は上昇せず、給湯混合弁はさらに湯側に制御されるが、誤接続された風呂湯張り温度センサが給湯温度の上昇を検知し、設定温度から一定温度以上上昇した時点で両方の混合弁を水側に制御するので、熱いお湯がそのまま出湯されるのを防ぐことができる。流量センサを誤接続した場合も同様で、風呂湯張り時に給湯流量弁が流量検知するが、実際には給湯されていないので給湯温度センサの温度は低いままで給湯混合弁が湯側に制御される。次に給湯されると、給湯混合弁が湯側になっているが給湯温度センサが給湯温度の上昇を検知し、設定温度から一定温度以上上昇した時点で、両方の混合弁を水側に制御するので、熱いお湯がそのまま出湯されるのを防ぐことができる。
【００１０】
【発明の実施の形態】
請求項１に記載の発明は、貯湯タンクからの湯と水を混合して給湯する給湯混合弁と、給湯温度を検出する給湯温度センサと、給湯流量を検出する給湯流量センサからなる給湯配管回路と、前記貯湯タンクからの湯と水を混合して風呂湯張りをする風呂混合弁と、風呂湯張り温度を検出する風呂湯張り温度センサと、風呂湯張り流量を検出する風呂流量センサと注湯弁からなる風呂湯張り配管回路と、前記給湯配管回路と風呂湯張り回路の湯温をそれぞれ制御する制御装置とを備え、前記制御装置は、前記給湯温度センサもしくは前記風呂湯張り温度センサが設定温度より一定温度以上高い湯温を検出すると異常と判断し、前記給湯混合弁および前記風呂混合弁の両方の混合弁を水側に制御する構成としたことを特徴とするものである。
【００１１】
そして、給湯混合弁と風呂混合弁が逆に接続された場合、あるいは給湯温度センサと風呂湯張り温度センサが逆に接続された場合、あるいは給湯流量センサと風呂流量センサが逆に接続された場合は、設定条件とは異なる条件で給湯動作あるいは風呂湯張り動作が行われることになり、給湯あるいは風呂湯張り時に設定温度より高い高温のお湯が出湯されることになる。そこで、請求項１においては、給湯温度センサあるいは風呂湯張り温度センサが設定温度より一定温度以上高い湯温を検出すると、誤接続による異常動作であると判断し、両方の混合弁を水側に制御することで、熱いお湯がそのまま出湯され続けることがないようにして安全性を確保している。
【００１２】
請求項２に記載の発明は、制御装置がどちらかの温度センサが予め定めた所定温度以上を検出すると異常と判断し、両方の混合弁を水側に制御する構成としたことを特徴とするものである。
【００１３】
そして、請求項１と同様に誤接続されて高温のお湯が出湯されても、どちらかの温度センサが予め定めた所定温度以上を検出すると、両方の混合弁を水側に制御するので熱いお湯がそのまま出湯されるのを防ぐことができる。
【００１４】
請求項３に記載の発明は、制御装置がどちらか一方の流量センサの検出信号を受けたとき、どちらかの温度センサが設定温度より一定温度以上であれば異常と判断し、両方の混合弁を水側に制御する構成としたことを特徴とするものである。
【００１５】
そして、流量センサで給湯あるいは風呂湯張りしていることを検知している時のみ、誤接続時の温度上昇を検知するようにしているので、給湯あるいは風呂湯張りしていない時に熱伝導による温度上昇等で誤検知することがなく、信頼性の高い異常検知を行うことができる。
【００１６】
請求項４に記載の発明は、制御装置がどちらかの一方の流量センサの検出信号を受けたとき、どちらかの温度センサが予め定めた所定温度以上を検出したとき異常と判断し、両方の混合弁を水側に制御する構成としたことを特徴とするものである。
【００１７】
そして、流量センサで給湯あるいは風呂湯張りしていることを検知している時のみ、誤接続時の温度上昇を検知するようにしているので、給湯あるいは風呂湯張りしていない時に熱伝導による温度上昇等で誤検知することがなく、信頼性の高い異常検知を行うことができる。
【００１８】
請求項５に記載の発明は、制御装置が異常検知したとき、異常警告を報知する異常報知手段を設けた構成としたことを特徴とするものである。
【００１９】
そして、機器の異常発生時に使用者に報知することができ、安全性が向上する。
【００２０】
【実施例】
以下、本発明の実施例について図面を用いて説明する。
【００２１】
（実施例１）
図１は本発明の実施例１における電気温水器の断面図、図２は制御ブロック図である。
【００２２】
図１において、１０は給水配管、１１は給水配管１０を底部に接続した貯湯タンクで、１２は減圧弁で貯湯タンク１１の水圧を減圧するようになっている。また、貯湯タンク１１には、貯湯タンク１１内の大容量の水を加熱する電気ヒータ１３が配設されている。
【００２３】
１４は貯湯タンク１１の上部に接続した出湯配管で、給湯用の給湯混合弁２１とふろ湯はり用のふろ混合弁３１の湯側に接続されている。給湯混合弁２１、ふろ混合弁３１の水側は、減圧弁１２を介して給水配管１０に接続されている。給湯混合弁２１の出口は、給湯流量センサー２２を介して所定の場所、例えば台所や浴室の給湯口等へとつながっている。２３は給湯温度センサで、給湯混合弁２１の出湯温度を検出する。ふろ混合弁３１の出口は、ふろ流量センサー３２、注湯弁３４を介して浴槽につながっている。３３はふろ給湯温度センサで、ふろ混合弁３１の出湯温度を検出する。出湯配管１４から給湯側または、ふろ側に出湯すると、それに伴い給水配管１０から貯湯タンク１１内に水が給水される。この際、貯湯タンク１１内では比重差から湯が上部、水が下部に分離した状態で溜まるようになっている。また、電気ヒータ１３は、貯湯タンクの水を加熱して、貯湯タンク１１全体を沸き上げるようになっている。
【００２４】
制御装置４１には、給湯流量センサ２２からの流量、給湯温度センサ２３からの給湯温度と、ふろ流量センサ３２からの流量、ふろ給湯温度センサ３３からのふろ給湯温度とが入力されている。また、制御装置４１には、台所リモコン２４からの給湯温度設定と、ふろリモコン３５からのふろ設定温度、ふろ湯はり積算流量がそれぞれ入力されている。制御装置４１の出力は、給湯混合弁２１、ふろ混合弁３１と、注湯弁３４に接続されている。
【００２５】
制御装置４１は、給湯口が開けられ、給湯流量センサ２２からの検知信号を入力すると給湯混合弁２１が作動し、給湯温度がリモコン２４で設定された給湯温度設定になるように給湯混合弁２１を駆動制御する。また、制御装置４１は、給湯が停止されると、給湯混合弁２１による温度制御動作を停止し、給湯混合弁２１の作動を停止させる。
【００２６】
また、制御装置４１は、浴槽にふろ湯はりするとき、台所リモコン２４またはふろリモコン３５からふろ湯はり信号が入ると、注湯弁３４を開いて浴槽に対するふろ湯はりを開始し、ふろ湯張り温度がふろリモコン３５で設定されたふろ温度設定になるようにふろ混合弁３１を駆動制御する。ふろ流量センサ３２からの検知信号を積算しふろリモコン３５で設定された積算流量に達すると、注湯弁３４を閉めふろ湯はりを完了する。
【００２７】
制御装置４１は、異常検知したとき、台所リモコン２４またはふろリモコン３５のどちらか、もしくは両方に異常検知の信号を送る。そして、台所リモコン２４及びふろリモコン３５は異常信号を受けると特定の異常表示をする。
【００２８】
次に、図３のフローチャートを用いて異常検知動作について説明すると、処理５１では給湯温度センサ２３で検知した給湯温度Ｔ１が台所リモコン２４で設定された設定温度Ｔ１ｓよりも一定温度ΔＴ１以上高いかどうかの判定を行う。高ければ処理５３へ進み、低ければ処理５２に進む。処理５２ではふろ給湯温度センサ３３で検知した給湯温度Ｔ２がふろリモコン３５で設定された設定温度Ｔ２ｓよりも一定温度ΔＴ２以上高いかどうかの判定を行う。高ければ処理５３へ進み、低ければ異常なしとして他の処理に進む。処理５３では、異常処理で給湯混合弁２１及びふろ混合弁３１を水側に駆動し、処理５４に進む。処理５４では異常報知信号をリモコンに出力し他の処理に進む。
【００２９】
ここで、給湯混合弁２１とふろ混合弁３１が逆に接続された場合、ふろ湯はり時には、ふろ混合弁３１は制御されず給湯混合弁２１が間違って制御される。ふろ湯はり温度Ｔ２が設定湯温Ｔ２ｓより低ければ給湯混合弁２１が湯側に動作してしまう。そして、次に給湯を行うとき、給湯混合弁２１は湯側位置となっているため、貯湯タンク１１の上部の温度（約９０℃）のお湯がそのまま出湯され、給湯温度センサ２３は処理５１で設定温度Ｔ１（例えば４０℃）から一定温度ΔＴ１（例えば１０℃）以上上昇した（すなわち４０＋１０＝５０℃以上になった）ことを検知でき処理５３に進む。そして処理５３で両方の混合弁を水側に制御するので熱いお湯がそのまま出湯されるのを防ぐことができる。さらに処理５４で異常報知を行い、台所リモコン２４またはふろリモコン３５では、制御装置４１からの異常報知信号を受けて特定の異常報知がなされ、使用者に知らしめることができる。
【００３０】
次に、給湯温度センサ２３とふろ給湯温度センサ３３が逆に接続された場合、給湯時に給湯混合弁２１を制御しても給湯温度センサ２３の温度は上昇せず、給湯混合弁２１はさらに湯側に制御される。この時、誤接続されたふろ給湯温度センサ３３が給湯温度の上昇を検知し処理５２でふろリモコン３５で設定された設定温度Ｔ２から一定温度ΔＴ２以上上昇したことが検知できる。処理５３に進む。そして処理５３で両方の混合弁２１、３１を水側に制御するので熱いお湯がそのまま出湯されるのを防ぐことができる。さらに処理５４で異常報知を行い、台所リモコン２４またはふろリモコン３５では、制御装置４１からの異常報知信号を受けて特定の異常報知がなされ、使用者に知らしめることができる。給湯混合弁２１が湯側に制御される。次に給湯されると、給湯混合弁２１が湯側になっているが給湯温度センサ２３が給湯温度の上昇を検知し、設定温度から一定温度上昇した時点で両方の混合弁２１、３１を水側に制御するので熱いお湯がそのまま出湯されるのを防ぐことができる。
【００３１】
また、流量センサ２２、３２が誤接続の場合も同様で、ふろ湯はり時に給湯流量センサ２２が流量検知するが、実際には給湯されていないので給湯温度センサ２３の温度は低いままで給湯混合弁２１が湯側に制御される。次に給湯されると、給湯混合弁２１が湯側になっているので熱いお湯出湯される。この時、給湯温度センサ２３の検知温度は上昇し、処理５１で設定温度Ｔ１から一定温度ΔＴ１以上上昇したことを検知でき処理５３に進む。そして処理５３で両方の混合弁２１、３１を水側に制御するので熱いお湯がそのまま出湯されるのを防ぐことができる。さらに処理５４で異常報知を行い、台所リモコン２４またはふろリモコン３５では、制御装置４１からの異常報知信号を受けて特定の異常報知がなされ、使用者に知らしめることができる。
【００３２】
このように、給湯側と風呂側の混合弁、温度センサ、流量センサが誤接続されても熱いお湯が出湯されつづけることはなく、リモコンで異常報知されるので使用者に知らしめることができ、安全性が向上する。
【００３３】
また、異常検知温度を、設定温度＋ΔＴとすることでより低い温度で、より早く異常が検知でき、誤判定もなく、確実に異常検知できる。
【００３４】
（実施例２）
図４は本発明の実施例２における制御装置のフローチャートである。実施例１で述べた部分と同じ部分は同一番号を付記して説明を省略し、異なる部分のみを説明する。
【００３５】
処理６１では給湯温度センサ２３で検知した給湯温度Ｔ１が予め定めた所定温度Ｔ１ｍよりも高いかどうかの判定を行う。高ければ処理６３へ進み、低ければ処理６２に進む。処理６２ではふろ給湯温度センサ３３で検知した給湯温度Ｔ２が予め定めた所定温度Ｔ２ｍよりも高いかどうかの判定を行う。高ければ処理５３へ進み、実施例1と同じ処理となる。
【００３６】
例えば、給湯混合弁２１とふろ混合弁３１が逆に接続された場合、ふろ湯はり時には、ふろ混合弁３１は制御されず給湯混合弁２１が間違って制御される。ふろ湯はり温度Ｔ２が設定温度Ｔ２ｓより低ければ給湯混合弁２１が湯側に動作してしまう。そして、次に給湯を行うとき給湯混合弁２１は湯側位置となっているため、貯湯タンク１１の上部の温度（約９０℃）のお湯がそのまま出湯され、給湯温度センサ２３は処理６１で所定温度Ｔ１ｍ（例えば６５℃）より上昇したことを検知でき、処理５３に進み実施例１と同様に、両方の混合弁２１、３１を水側に制御するので熱いお湯がそのまま出湯されるのを防ぐことができ、リモコンで特定の異常報知がなされ、使用者に知らしめることができる。
【００３７】
次に、給湯温度センサ２３と風呂給湯温度センサ３３が逆に接続された場合、給湯時に給湯混合弁２１を制御しても給湯温度センサ２３の温度は上昇せず、給湯混合弁２１はさらに湯側に制御される。この時、誤接続されたふろ給湯温度センサ３３が給湯温度の上昇を検知し、処理６２でふろリモコン３５で設定された所定温度Ｔ２ｍより上昇したことが検知でき、処理５３に進み実施例１と同様に、両方の混合弁を水側に制御するので熱いお湯がそのまま出湯されるのを防ぐことができ、リモコンで特定の異常報知がなされ、使用者に知らしめることができる。
【００３８】
また、流量センサ２２、３２が誤接続の場合も同様で、ふろ湯はり時に給湯流量センサ２２が流量検知するが、実際には給湯されていないので給湯温度センサ２３の温度は低いままで給湯混合弁２１が湯側に制御される。次に給湯されると、給湯混合弁２１が湯側になっているので熱いお湯出湯される。この時、給湯温度センサ２３の検知温度は上昇し、処理５１で所定温度Ｔ１ｍより上昇したことを検知でき、処理５３に進み実施例１と同様に、両方の混合弁２１、３１を水側に制御するので熱いお湯がそのまま出湯されるのを防ぐことができ、リモコンで特定の異常報知がなされ、使用者に知らしめることができる。
【００３９】
このように、給湯側と風呂側の混合弁、温度センサ、流量センサが誤接続されても熱いお湯が出湯されつづけることはなく、リモコンで異常報知されるので使用者に知らしめることができ、安全性が向上する。
【００４０】
また、異常検知温度を、予め定めた所定温度とすることで、判断処理が簡単にでき、所定温度を火傷しない温度に設定すれば、安全は確保できる。また、実使用の中で温度センサの検知温度にオーバーシュートが多少あっても、所定温度を超えなければ誤検知することもなく、安全かつ確実に異常検知できる。
【００４１】
（実施例３）
図５は本発明の実施例３における制御装置のフローチャートである。実施例１で述べた部分と同じ部分は同一番号を付記して説明を省略し、異なる部分のみを説明する。
【００４２】
処理７１では給湯流量センサ２２によりカラン等の給湯利用があったかどうかの判定を行う。給湯利用が行われ給湯流量センサ２２が流量を検知すると、処理５１に進み、以降、上記実施例１で述べた処理と同様の処理を行う。
【００４３】
また、処理７１で給湯利用がないと判定した場合は、処理７２に進み、風呂流量センサ３２により風呂湯張りが行われているかどうかの判定を行う。風呂の湯張りが行われ風呂流量センサ３２が流量を検知すると、処理５１に進み、以降、上記実施例１で述べた処理と同様の処理を行う。
【００４４】
また、処理７２で風呂湯張り動作が確認されない場合は、給湯温度あるいは風呂温度の異常検知は行わず、他の処理に進む。
【００４５】
このように、実施例３は給湯動作あるいは風呂湯張り動作が行われた場合のみ、給湯温度あるいは風呂温度が設定温度より一定温度以上上昇したかどうかを判定して、部品の誤接続を確認するようにしたもので、給湯あるいは風呂湯張りしていない時の熱伝導による温度上昇等で誤検知することがなく、信頼性の高い異常検知を行うことができる。
【００４６】
（実施例４）
図６は本発明の実施例４における制御装置のフローチャートである。実施例１で述べた部分と同じ部分は同一番号を付記して説明を省略し、異なる部分のみを説明する。
【００４７】
処理７１では給湯流量センサ２２によりカラン等の給湯利用があったかどうかの判定を行う。給湯利用が行われ給湯流量センサ２２が流量を検知すると、処理６１に進み、以降、上記実施例２で述べた処理と同様の処理を行う。
【００４８】
また、処理７１で給湯利用がないと判定した場合は、処理７２に進み、風呂流量センサ３２により風呂湯張りが行われているかどうかの判定を行う。風呂の湯張りが行われ風呂流量センサ３２が流量を検知すると、処理６１に進み、以降、上記実施例２で述べた処理と同様の処理を行う。
【００４９】
また、処理７２で風呂湯張り動作が確認されない場合は、給湯温度あるいは風呂温度の異常検知は行わず、他の処理に進む。
【００５０】
このように、実施例４は給湯動作あるいは風呂湯張り動作が行われた場合のみ、予め定めた所定温度と給湯温度あるいは風呂温度を比較し、異常の有無を判定することで部品の誤接続を確認するようにしたもので、給湯あるいは風呂湯張りしていない時の熱伝導による温度上昇等で誤検知することがなく、信頼性の高い異常検知を行うことができる。
【００５１】
【発明の効果】
以上のように本発明によれば、給湯混合弁と風呂混合弁が逆に接続された場合、あるいは給湯温度センサと風呂湯張り温度センサが逆に接続された場合、あるいは給湯流量センサと風呂流量センサが逆に接続された場合において、給湯温度センサあるいは風呂湯張り温度センサが設定温度より一定温度以上高い湯温を検出すると、誤接続による異常動作であると判断し、両方の混合弁を水側に制御するようにしているため、熱いお湯がそのまま出湯され続けることがなく、安全な貯湯式温水器を提供することができる。
【図面の簡単な説明】
【図１】本発明の実施例１における貯湯式温水器の構成図
【図２】同貯湯式温水器の制御ブロック図
【図３】同貯湯式温水器の制御フローチャート
【図４】本発明の実施例２における貯湯式温水器の制御フローチャート
【図５】本発明の実施例３における貯湯式温水器の制御フローチャート
【図６】本発明の実施例４における貯湯式温水器の制御フローチャート
【符号の説明】
１１貯湯タンク
２１給湯混合弁
２２給湯流量センサ
２３給湯温度センサ
３１風呂混合弁
３２風呂流量センサ
３３風呂湯張り温度センサ
３４注湯弁
４１制御装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to hot water supply control of a hot water storage type hot water heater.
[0002]
[Prior art]
In recent years, in addition to the general hot water supply operation to a kitchen etc., various functions are also required for the bath apparatus. For example, an automatic bath filling function that automatically drops hot water to the set water level, a chasing function that raises the bath water to a desired temperature, and a slimming function that drops a certain amount of city water into the bath to lower the bath water temperature There is an additional hot water function that drops a certain amount of heated hot water into the bath. Therefore, in order to cope with the various functions described above, two hot water supply piping circuits are provided as a hot water discharge path from the hot water storage tank, so that general hot water supply and bath hot water supply can be used simultaneously (see Patent Document 1). ).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-48409
[Problems to be solved by the invention]
However, in the conventional configuration, when the mixing valve, the hot water temperature sensor, and the flow rate sensor of the two hot water supply piping circuits provided to realize various functions are erroneously connected during maintenance or service, it is not always safe. For example, if the hot water mixing valve and the bath mixing valve are connected in reverse, the bath mixing valve is not controlled when the hot water is filled, and the hot water mixing valve is incorrectly controlled. If it is lower, the hot water supply mixing valve will move to the hot water side. If hot water is supplied after such control is performed, hot water close to 90 degrees is discharged as it is.
[0005]
Also, if the hot water temperature sensor and bath hot water temperature sensor are connected incorrectly, the temperature of the hot water sensor will not rise even if the hot water mixing valve is controlled during hot water supply, and the hot water mixing valve is further controlled to the hot water side to 90 degrees. Near hot water will be discharged. The same applies to the flow rate sensor, and the hot water supply flow valve detects the flow rate when the bath is filled, but since the hot water is not actually supplied, the temperature of the hot water temperature sensor remains low and the hot water mixing valve is controlled to the hot water side. When hot water is next supplied, since the hot water supply mixing valve is on the hot water side, hot water close to 90 degrees is discharged.
[0006]
As described above, if the hot water supply side and bath side parts are misconnected, they will operate under conditions other than the set conditions, which may lead to unexpected results such as high temperature hot water.
[0007]
In view of the above, the present invention has an object to provide a safe hot water heater that prevents unexpected high-temperature hot water by quickly detecting a malfunction or incorrect wiring as described above and operating it safely. It is what.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a hot water supply comprising a hot water mixing valve that mixes and supplies hot water from a hot water storage tank, a hot water temperature sensor that detects a hot water temperature, and a hot water flow rate sensor that detects a hot water flow rate. A piping circuit, a bath mixing valve for filling the bath with hot water from the hot water storage tank, a bath hot water temperature sensor for detecting the bath hot water temperature, and a bath flow sensor for detecting the bath hot water flow rate comprising the Note and the bath hot water filling pipe circuit consisting of the hot water valve, and the hot water supply pipe circuit and a control device for controlling each of the hot water temperature of the bath hot water filling circuit, wherein the control device, the hot water temperature sensor or the bath hot water filling temperature When the sensor detects a hot water temperature higher than a set temperature by a certain temperature or more, it is determined as abnormal, and the mixing valve of both the hot water supply mixing valve and the bath mixing valve is controlled to the water side.
[0009]
According to the above invention, when the hot water supply mixing valve and the bath mixing valve are connected in reverse, the bath mixing valve is not controlled and the hot water supply mixing valve is erroneously controlled during bath hot water filling, and the bath hot water filling temperature is set to the set hot water temperature. If it is lower, the hot water supply mixing valve will move to the hot water side. However, the next time hot water is supplied, if the hot water temperature sensor detects that the temperature has risen above the set temperature by a certain amount, both mixing valves are controlled to the water side, preventing hot hot water from being discharged as it is. it can. If the hot water temperature sensor and bath hot water temperature sensor are connected in reverse, controlling the hot water mixing valve during hot water supply will not increase the temperature of the hot water sensor, and the hot water mixing valve will be further controlled to the hot water side. Incorrectly connected bath hot water temperature sensor detects an increase in hot water supply temperature, and controls both mixing valves to the water side when the temperature rises above a certain level from the set temperature. Can be prevented. The same applies when the flow sensor is connected incorrectly.The hot water flow valve detects the flow rate when the bath is hot, but since the hot water is not actually supplied, the hot water temperature sensor remains low and the hot water mixing valve is controlled to the hot water side. The Next time when hot water is supplied, the hot water supply mixing valve is on the hot water side, but the hot water temperature sensor detects an increase in hot water supply temperature, and when the temperature rises from the set temperature by a certain level or more, both mixing valves are controlled to the water side. Therefore, hot water can be prevented from being poured out as it is.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The invention described in claim 1 is a hot water supply piping circuit comprising a hot water mixing valve for mixing hot water from a hot water storage tank and supplying hot water, a hot water temperature sensor for detecting hot water temperature, and a hot water flow rate sensor for detecting hot water flow rate. A bath mixing valve for filling the bath with hot water from the hot water storage tank, a bath hot water temperature sensor for detecting the bath hot water temperature, and a bath flow sensor for detecting the bath hot water flow rate. a bath hot water filling pipe circuit consisting of the hot water valve, said a hot water supply pipe circuit and a control device for controlling each of the hot water temperature of the bath hot water filling circuit, wherein the control device, the hot water temperature sensor or the bath hot water filling temperature sensor When a hot water temperature higher than a set temperature by a certain temperature is detected, it is determined that there is an abnormality, and the mixing valve of both the hot water mixing valve and the bath mixing valve is controlled to the water side.
[0011]
When the hot water mixing valve and bath mixing valve are connected in reverse, when the hot water temperature sensor and bath hot water temperature sensor are connected in reverse, or when the hot water flow sensor and bath flow sensor are connected in reverse The hot water supply operation or bath hot water filling operation is performed under conditions different from the set conditions, and hot water having a temperature higher than the set temperature is discharged during hot water supply or bath hot water filling. Therefore, in claim 1, when the hot water temperature sensor or bath hot water temperature sensor detects a hot water temperature higher than a set temperature by a certain temperature or more, it is determined that the operation is abnormal due to an incorrect connection, and both mixing valves are set to the water side. By controlling it, safety is ensured so that hot water does not continue to be poured out.
[0012]
The invention according to claim 2 is characterized in that the controller determines that an abnormality is detected when one of the temperature sensors detects a predetermined temperature or higher, and controls both mixing valves to the water side. Is.
[0013]
And even if it is misconnected as in claim 1 and hot hot water is discharged, if either temperature sensor detects a predetermined temperature or higher, both mixing valves are controlled to the water side, so hot hot water is used. Can be prevented from being discharged as it is.
[0014]
According to a third aspect of the present invention, when the control device receives a detection signal from one of the flow rate sensors, if either of the temperature sensors is equal to or higher than a set temperature, it is determined that there is an abnormality. It has the structure which controlled to water side.
[0015]
And only when it detects that the hot water supply or bath water is filled with the flow rate sensor, it detects the temperature rise at the time of incorrect connection. A highly reliable abnormality detection can be performed without erroneous detection due to a rise or the like.
[0016]
In the invention according to claim 4, when the control device receives a detection signal of one of the flow sensors, it is determined that an abnormality is detected when one of the temperature sensors detects a predetermined temperature or higher. The mixing valve is controlled to the water side.
[0017]
And only when it detects that the hot water supply or bath water is filled with the flow rate sensor, it detects the temperature rise at the time of incorrect connection. A highly reliable abnormality detection can be performed without erroneous detection due to a rise or the like.
[0018]
The invention described in claim 5 is characterized in that an abnormality notifying means for notifying an abnormality warning is provided when the control device detects an abnormality.
[0019]
And it can alert | report to a user at the time of abnormality of an apparatus, and safety improves.
[0020]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0021]
Example 1
FIG. 1 is a sectional view of an electric water heater in Embodiment 1 of the present invention, and FIG. 2 is a control block diagram.
[0022]
In FIG. 1, 10 is a water supply pipe, 11 is a hot water storage tank having the water supply pipe 10 connected to the bottom, and 12 is a pressure reducing valve for reducing the water pressure of the hot water storage tank 11. The hot water storage tank 11 is provided with an electric heater 13 for heating a large volume of water in the hot water storage tank 11.
[0023]
14 is a hot water supply pipe connected to the upper part of the hot water storage tank 11 and is connected to the hot water side of the hot water mixing valve 21 for hot water supply and the hot water mixing valve 31 for the hot water beam. The water side of the hot water supply mixing valve 21 and the bath mixing valve 31 is connected to the water supply pipe 10 via the pressure reducing valve 12. An outlet of the hot water supply mixing valve 21 is connected to a predetermined place, for example, a hot water outlet of a kitchen or a bathroom, through a hot water supply flow rate sensor 22. Reference numeral 23 denotes a hot water supply temperature sensor that detects the hot water temperature of the hot water supply mixing valve 21. The outlet of the bath mixing valve 31 is connected to the bathtub via the bath flow sensor 32 and the pouring valve 34. 33 is a bath hot water temperature sensor that detects the temperature of the hot water of the bath mixing valve 31. When hot water is discharged from the hot water supply pipe 14 to the hot water supply side or the bath side, water is supplied from the water supply pipe 10 into the hot water storage tank 11 accordingly. At this time, the hot water is stored in the hot water storage tank 11 in a state where the hot water is separated into the upper part and the water is separated into the lower part due to the difference in specific gravity. Further, the electric heater 13 heats the water in the hot water storage tank to boil the entire hot water storage tank 11.
[0024]
A flow rate from the hot water supply flow rate sensor 22, a hot water supply temperature from the hot water supply temperature sensor 23, a flow rate from the bath flow rate sensor 32, and a hot water supply temperature from the hot water supply temperature sensor 33 are input to the control device 41. Further, the hot water supply temperature setting from the kitchen remote control 24, the bath set temperature from the bath remote control 35, and the bath water accumulated flow rate are input to the control device 41, respectively. The output of the control device 41 is connected to the hot water supply mixing valve 21, the bath mixing valve 31, and the pouring valve 34.
[0025]
When the hot water supply port is opened and a detection signal is input from the hot water supply flow rate sensor 22, the controller 41 operates the hot water supply mixing valve 21 so that the hot water supply temperature is set to the hot water supply temperature set by the remote controller 24. Is controlled. Further, when the hot water supply is stopped, the control device 41 stops the temperature control operation by the hot water supply mixing valve 21 and stops the operation of the hot water supply mixing valve 21.
[0026]
Further, when filling the bathtub, when the bath remote control signal is input from the kitchen remote control 24 or the bath remote control 35, the control device 41 opens the pouring valve 34 and starts the bath hot water filling. The bath mixing valve 31 is driven and controlled so that the temperature becomes the bath temperature setting set by the bath remote control 35. When the detection signals from the bath flow sensor 32 are integrated and the integrated flow set by the bath remote control 35 is reached, the hot water supply valve 34 is closed to complete the bath hot water.
[0027]
When an abnormality is detected, the control device 41 sends an abnormality detection signal to either or both of the kitchen remote controller 24 and the bathroom remote controller 35. When the kitchen remote controller 24 and the bathroom remote controller 35 receive an abnormality signal, they display a specific abnormality.
[0028]
Next, the abnormality detection operation will be described with reference to the flowchart of FIG. 3. In process 51, whether or not the hot water supply temperature T1 detected by the hot water supply temperature sensor 23 is higher than the set temperature T1s set by the kitchen remote controller 24 by a certain temperature ΔT1 or more. Judgment is made. If it is higher, the process proceeds to process 53, and if it is lower, the process proceeds to process 52. In the process 52, it is determined whether or not the hot water supply temperature T2 detected by the bath hot water temperature sensor 33 is higher than the set temperature T2s set by the bath remote controller 35 by a certain temperature ΔT2. If it is higher, the process proceeds to process 53, and if it is lower, the process proceeds to another process with no abnormality. In the process 53, the hot water supply mixing valve 21 and the bath mixing valve 31 are driven to the water side in the abnormal process, and the process proceeds to the process 54. In process 54, an abnormality notification signal is output to the remote controller and the process proceeds to another process.
[0029]
Here, when the hot water supply mixing valve 21 and the bath mixing valve 31 are connected in reverse, during the hot water filling, the bath mixing valve 31 is not controlled and the hot water mixing valve 21 is erroneously controlled. If the hot water beam temperature T2 is lower than the set hot water temperature T2s, the hot water supply mixing valve 21 will operate to the hot water side. When the hot water supply is next performed, the hot water mixing valve 21 is in the hot water side position, so that the hot water at the upper temperature (about 90 ° C.) of the hot water storage tank 11 is discharged as it is. It can be detected that the set temperature T1 (for example, 40 ° C.) has increased by a certain temperature ΔT1 (for example, 10 ° C.) or more (that is, 40 + 10 = 50 ° C. or more). And since both mixing valves are controlled to the water side by the process 53, it can prevent that hot hot water is discharged as it is. Furthermore, abnormality notification is performed in the process 54, and the kitchen remote controller 24 or the bathroom remote controller 35 receives the abnormality notification signal from the control device 41 to notify the user of a specific abnormality and can notify the user.
[0030]
Next, when the hot water supply temperature sensor 23 and the bath hot water supply temperature sensor 33 are connected in reverse, even if the hot water supply mixing valve 21 is controlled during hot water supply, the temperature of the hot water supply temperature sensor 23 does not rise, and the hot water supply mixing valve 21 further has hot water. Controlled to the side. At this time, the erroneously connected bath hot water temperature sensor 33 detects an increase in the hot water temperature, and it can be detected in step 52 that the temperature has risen by a predetermined temperature ΔT2 or more from the set temperature T2 set by the bath remote control 35. Proceed to step 53. And since both the mixing valves 21 and 31 are controlled to the water side by the process 53, it can prevent hot hot water being discharged as it is. Furthermore, abnormality notification is performed in the process 54, and the kitchen remote controller 24 or the bathroom remote controller 35 receives the abnormality notification signal from the control device 41 to notify the user of a specific abnormality and can notify the user. The hot water supply mixing valve 21 is controlled to the hot water side. Next, when hot water is supplied, the hot water supply mixing valve 21 is on the hot water side, but the hot water supply temperature sensor 23 detects an increase in the hot water supply temperature. Since it is controlled to the side, hot water can be prevented from being discharged as it is.
[0031]
Similarly, when the flow rate sensors 22 and 32 are erroneously connected, the hot water supply flow rate sensor 22 detects the flow rate when filling the hot water, but since hot water is not actually supplied, the hot water supply temperature sensor 23 is kept at a low temperature and mixed with hot water supply. The valve 21 is controlled to the hot water side. Next, when hot water is supplied, hot water is poured out because the hot water supply mixing valve 21 is on the hot water side. At this time, the temperature detected by the hot water supply temperature sensor 23 rises, and it is detected in process 51 that the temperature has risen by a predetermined temperature ΔT1 or more from the set temperature T1, and the process proceeds to process 53. And since both the mixing valves 21 and 31 are controlled to the water side by the process 53, it can prevent hot hot water being discharged as it is. Furthermore, abnormality notification is performed in the process 54, and the kitchen remote controller 24 or the bathroom remote controller 35 receives the abnormality notification signal from the control device 41 to notify the user of a specific abnormality and can notify the user.
[0032]
In this way, even if the mixing valve, temperature sensor, and flow sensor on the hot water supply side and the bath side are misconnected, hot hot water will not continue to be discharged, and it will be notified to the user because an abnormality is notified by the remote control, Safety is improved.
[0033]
Further, by setting the abnormality detection temperature to the set temperature + ΔT, the abnormality can be detected earlier at a lower temperature, and the abnormality can be reliably detected without erroneous determination.
[0034]
(Example 2)
FIG. 4 is a flowchart of the control device according to the second embodiment of the present invention. The same parts as those described in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.
[0035]
In process 61, it is determined whether or not the hot water temperature T1 detected by the hot water temperature sensor 23 is higher than a predetermined temperature T1m. If it is higher, the process proceeds to process 63, and if it is lower, the process proceeds to process 62. In process 62, it is determined whether or not the hot water temperature T2 detected by the hot water temperature sensor 33 is higher than a predetermined temperature T2m. If it is higher, the process proceeds to process 53 and the same process as in the first embodiment is performed.
[0036]
For example, when the hot water mixing valve 21 and the bath mixing valve 31 are connected in reverse, the hot water mixing valve 31 is not controlled and the hot water mixing valve 21 is erroneously controlled during bathing. If the hot water beam temperature T2 is lower than the set temperature T2s, the hot water supply mixing valve 21 will operate to the hot water side. When hot water is next supplied, the hot water mixing valve 21 is in the hot water side position, so the hot water at the upper temperature (about 90 ° C.) of the hot water storage tank 11 is discharged as it is. It can be detected that the temperature has risen above T1m (for example, 65 ° C.), and the process proceeds to processing 53, and both mixing valves 21 and 31 are controlled to the water side in the same manner as in the first embodiment, thereby preventing hot hot water from being discharged as it is. It is possible to notify the user of a specific abnormality with the remote controller.
[0037]
Next, when the hot water supply temperature sensor 23 and the bath hot water temperature sensor 33 are connected in reverse, even if the hot water supply mixing valve 21 is controlled during hot water supply, the temperature of the hot water supply temperature sensor 23 does not rise. Controlled to the side. At this time, the erroneously connected bath hot water temperature sensor 33 detects an increase in the hot water temperature, and in process 62 it can be detected that the temperature has risen above the predetermined temperature T2m set by the bath remote control 35. Similarly, since both mixing valves are controlled to the water side, it is possible to prevent hot hot water from being poured out as it is, and a specific abnormality notification is given by the remote controller, so that the user can be informed.
[0038]
Similarly, when the flow rate sensors 22 and 32 are erroneously connected, the hot water supply flow rate sensor 22 detects the flow rate when filling the hot water, but since hot water is not actually supplied, the hot water supply temperature sensor 23 is kept at a low temperature and mixed with hot water supply. The valve 21 is controlled to the hot water side. Next, when hot water is supplied, hot water is poured out because the hot water supply mixing valve 21 is on the hot water side. At this time, the temperature detected by the hot water supply temperature sensor 23 rises, and it can be detected in the process 51 that the temperature has risen above the predetermined temperature T1m. Since it is controlled, it is possible to prevent hot hot water from being poured out as it is, and a specific abnormality is notified by the remote controller, so that the user can be informed.
[0039]
In this way, even if the mixing valve, temperature sensor, and flow sensor on the hot water supply side and the bath side are misconnected, hot hot water will not continue to be discharged, and it will be notified to the user because an abnormality is notified by the remote control, Safety is improved.
[0040]
Further, the determination process can be simplified by setting the abnormality detection temperature to a predetermined temperature, and safety can be ensured by setting the predetermined temperature to a temperature that does not cause burns. Further, even if there is a slight overshoot in the temperature detected by the temperature sensor during actual use, an abnormality can be detected safely and reliably without erroneous detection unless the temperature exceeds a predetermined temperature.
[0041]
(Example 3)
FIG. 5 is a flowchart of the control device according to the third embodiment of the present invention. The same parts as those described in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.
[0042]
In the process 71, it is determined by the hot water supply flow rate sensor 22 whether hot water such as currant has been used. When hot water supply is used and the hot water supply flow rate sensor 22 detects the flow rate, the process proceeds to a process 51, and thereafter, the same process as the process described in the first embodiment is performed.
[0043]
If it is determined in process 71 that hot water is not used, the process proceeds to process 72, and it is determined whether or not the hot water is filled by the bath flow rate sensor 32. When bath filling is performed and the bath flow sensor 32 detects the flow rate, the process proceeds to a process 51, and thereafter, the same process as the process described in the first embodiment is performed.
[0044]
If the bath hot water filling operation is not confirmed in the process 72, the abnormality of the hot water supply temperature or the bath temperature is not detected and the process proceeds to another process.
[0045]
As described above, in the third embodiment, only when the hot water supply operation or the bath hot water filling operation is performed, it is determined whether the hot water supply temperature or the bath temperature has risen by a predetermined temperature or more from the set temperature, and the erroneous connection of the components is confirmed. In this way, it is possible to perform highly reliable abnormality detection without causing erroneous detection due to a temperature rise due to heat conduction when hot water or bath water is not filled.
[0046]
Example 4
FIG. 6 is a flowchart of the control device according to the fourth embodiment of the present invention. The same parts as those described in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.
[0047]
In the process 71, it is determined by the hot water supply flow rate sensor 22 whether hot water such as currant has been used. When hot water supply is used and the hot water supply flow rate sensor 22 detects the flow rate, the process proceeds to process 61, and thereafter, the same process as the process described in the second embodiment is performed.
[0048]
If it is determined in process 71 that hot water is not used, the process proceeds to process 72, and it is determined whether or not the hot water is filled by the bath flow rate sensor 32. When bath filling is performed and the bath flow sensor 32 detects the flow rate, the process proceeds to process 61, and thereafter, the same process as that described in the second embodiment is performed.
[0049]
If the bath hot water filling operation is not confirmed in the process 72, the abnormality of the hot water supply temperature or the bath temperature is not detected and the process proceeds to another process.
[0050]
As described above, in the fourth embodiment, only when a hot water supply operation or a bath hot water filling operation is performed, a predetermined temperature and a hot water supply temperature or a bath temperature are compared with each other, and the presence or absence of an abnormality is determined to determine whether a component is erroneously connected. As a result of confirmation, there is no erroneous detection due to a temperature rise due to heat conduction when hot water or bath water is not filled, and highly reliable abnormality detection can be performed.
[0051]
【The invention's effect】
As described above, according to the present invention, when the hot water supply mixing valve and the bath mixing valve are connected in reverse, or when the hot water supply temperature sensor and bath hot water temperature sensor are connected in reverse, or the hot water supply flow rate sensor and bath flow rate. When the sensor is connected in reverse, if the hot water temperature sensor or bath hot water temperature sensor detects a hot water temperature that is higher than the set temperature by a certain level or more, it is determined that the operation is abnormal due to incorrect connection, and both mixing valves are turned off. Since the hot water is not discharged as it is, it is possible to provide a safe hot water heater.
[Brief description of the drawings]
FIG. 1 is a block diagram of a hot water heater according to Embodiment 1 of the present invention. FIG. 2 is a control block diagram of the hot water heater. FIG. 3 is a control flowchart of the hot water heater. FIG. 5 is a control flow chart of a hot water heater according to the third embodiment of the present invention. FIG. 6 is a control flowchart of the hot water heater according to the fourth embodiment of the present invention. Explanation】
DESCRIPTION OF SYMBOLS 11 Hot water storage tank 21 Hot-water supply mixing valve 22 Hot-water supply flow sensor 23 Hot-water supply temperature sensor 31 Bath mixing valve 32 Bath flow sensor 33 Bath hot water temperature sensor 34 Hot-water supply valve 41 Control apparatus

Claims

A hot water mixing valve for mixing hot water and water from a hot water storage tank, supplying hot water, a hot water temperature sensor for detecting hot water temperature, a hot water supply piping circuit comprising a hot water flow rate sensor for detecting hot water flow rate, and hot water from the hot water storage tank A bath mixing valve that mixes water to fill the bath, a bath hot water temperature sensor that detects the temperature of the hot water bath, a bath flow sensor that detects the bath water flow rate, and a bath hot water piping circuit that consists of a pouring valve. And a control device for controlling the hot water temperature of the hot water supply piping circuit and the hot water bathing circuit, respectively, the hot water temperature sensor or the hot water bath temperature sensor is a hot water temperature higher than a set temperature by a certain temperature or more. Is detected as abnormal, and the mixing valve of both the hot-water supply mixing valve and the bath mixing valve is controlled to the water side.

The hot water storage water heater according to claim 1, wherein the control device determines that an abnormality occurs when one of the temperature sensors detects a predetermined temperature or higher, and controls both mixing valves to the water side.

When the control device receives a detection signal from either one of the flow sensors, if either temperature sensor detects a hot water temperature that is higher than a set temperature by a certain level, it will determine that there is an abnormality and control both mixing valves to the water The hot water storage water heater according to claim 1, wherein

When the control device receives a detection signal from one of the flow sensors, it determines that it is abnormal when one of the temperature sensors detects a predetermined temperature or higher, and controls both mixing valves to the water side. The hot water storage water heater according to claim 2, wherein the hot water heater is a water heater.

The hot water storage type warmer according to any one of claims 1 to 4, wherein the control device is provided with an abnormality notification means for notifying an abnormality warning when the abnormality is determined to be abnormal and the mixing valve is controlled to the water side. .