JP4048975B2

JP4048975B2 - Hot water heater

Info

Publication number: JP4048975B2
Application number: JP2003045635A
Authority: JP
Inventors: 和久森上; 武彦重岡
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2003-02-24
Filing date: 2003-02-24
Publication date: 2008-02-20
Anticipated expiration: 2023-02-24
Also published as: JP2004257585A

Description

【０００１】
【発明の属する技術分野】
本発明は貯湯タンク内に熱交換器を設けた貯湯式温水器で風呂の追い焚きを行なうものに関するものである。
【０００２】
【従来の技術】
従来の構成を図４に示す電気温水器により説明すると、電気温水器は所要の容量を有する円筒状タンク１内の上部と下部に、タンク１内の水を設定温度まで加温するための上部ヒータ２と下部ヒータ３とをそれぞれ配設し、上部ヒータ２の上方にタンク１の外部から供給される水をタンク１内に貯留された温水により加温する螺旋状の熱交換器４を配設している。
【０００３】
電気温水器のタンク１は、その底部位置に給水管５、上部位置に出湯管６を設けて、給水管５から給水することによりタンク１内の湯を押し上げるようにして、出湯管６から出湯するようにしている。
【０００４】
一方、熱交換器４は、螺旋状に形成するとともに、この螺旋状に形成した熱交換器４の中心軸が、タンク１の中心軸と略一致するように配設するようにしている。この場合、螺旋状に形成した熱交換器４の巻径ｄを、タンク１の内径Ｄの１／２以上の寸法に設定するようにすることが好ましい。これにより、熱交換器４の周囲の熱交換によって冷却された温水が下降流となり、この下降流に対応して熱交換器４の中心部に上昇流が生じ、このタンク１内に貯留された温水の対流により、温水の循環が良好に維持され、熱交換を効率よく、かつ、確実に行うことができるものとなる。また、タンク１の胴部に取り付けた温度センサ７によって、温度の低下を迅速、かつ、正確に検知することができ、必要に応じて行う上部ヒータ２及び／又は下部ヒータ３による追加的な加熱を適切に実施することができるものとなる（例えば、特許文献１参照）。
【０００５】
【特許文献１】
特開２００２−４８４１４号公報（第４頁、第１図）
【０００６】
【発明が解決しようとする課題】
しかしながら上記従来の貯湯式温水器のタンク１の上部の高温水と風呂の温水を熱交換する風呂追いだき手段では、タンク１内に位置する熱交換器４が経年的に腐食などで穴があくと、タンク１内の圧力が熱交換器４内の圧力より高いため、タンク１内の高温水が熱交換器４内に流れ込んでしまう恐れがあり、この高温水が熱交換器４内に流れ込むと、風呂浴槽内に高温水が混ざり込んで浴槽水温度が異常に上昇したり、浴槽内の水が溢れてしまう心配があった。
【０００７】
またここで、タンク１内の高温水が使用された分は、給水管５から給水されるようになっていて、熱交換器４の穴明きで、タンク１内の高温水が熱交換器４内に流れ込んだ分も同様に、給水管５から給水されるので、熱交換器４の穴明きで浴槽内にタンク１内の高温水がどんどん流れ込むようになり、例えば、マンションなどでは浴槽内の水があふれて、階下に水漏れを生じたり、多量の水道水を消費するという心配があった。
【０００８】
本発明は上記課題を解決したもので、熱交換器４の穴明きを検出して、安全性の向上を図ることを目的としたものである。
【０００９】
【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もので、貯湯タンクと、貯湯タンク下部の水を貯湯タンク上部へ供給し加熱して貯湯タンク上部から高温としていく加熱手段と、貯湯タンク内に配設し風呂追い焚き時に風呂の温水を循環させ貯湯タンク内の高温水と熱交換して風呂の温水の温度を上昇させる風呂伝熱通路と、前記風呂伝熱通路の流れを遮断する風呂伝熱通路遮断手段とを備え、前記風呂伝熱通路に風呂追い焚き温度検出手段を配設し、風呂追いだき時に前記風呂追い焚き温度検出手段で検出した温度が、貯湯水の沸き揚げ温度より低く風呂設定温度より高い所定温度以上になった場合、異常と判断して異常警告を報知する異常報知手段を配設するとともに、前記風呂追い焚き温度検出手段で検出した温度が所定温度以上になった時に、前記風呂伝熱通路遮断手段を動作することを特徴とするものである。
【００１０】
上記発明によれば、風呂追い焚き時に風呂伝熱通路に配設した風呂追い焚き温度検出手段で検出した温度が所定温度以上になった時、例えば風呂追い焚き時に貯湯タンク内で熱交換されて風呂伝熱通路が高温となる最高温度より高い所定温度を風呂追い焚き温度検出手段した場合、風呂伝熱通路途中で貯湯タンク内の高温水が流れ込んだと判断することができ、即ち、風呂伝熱通路途中の穴明きを検出することができるようになる。
【００１１】
つまり、この風呂追い焚き時に風呂追い焚き温度検出手段で検出した温度が所定温度以上になった場合は、風呂伝熱通路途中の穴明き異常として、異常報知手段によりランプ点灯や警告音の作動等で異常警告を行なうことで、使用者に報知することができ、安全性が向上する。
【００１２】
【発明の実施の形態】
請求項１に記載の発明は、貯湯タンクと、貯湯タンク下部の水を貯湯タンク上部へ供給し加熱して貯湯タンク上部から高温としていく加熱手段と、貯湯タンク内に配設し風呂追い焚き時に風呂の温水を循環させ貯湯タンク内の高温水と熱交換して風呂の温水の温度を上昇させる風呂伝熱通路と、前記風呂伝熱通路の流れを遮断する風呂伝熱通路遮断手段とを備え、前記風呂伝熱通路に風呂追い焚き温度検出手段を配設し、風呂追いだき時に前記風呂追い焚き温度検出手段で検出した温度が、貯湯水の沸き揚げ温度より低く風呂設定温度より高い所定温度以上になった場合、異常と判断して異常警告を報知する異常報知手段を配設するとともに、前記風呂追い焚き温度検出手段で検出した温度が所定温度以上になった時に、前記風呂伝熱通路遮断手段を動作することを特徴とするものである。
【００１３】
そして、風呂追い焚き時に風呂伝熱通路に配設した風呂追い焚き温度検出手段で検出した温度が所定温度以上になった時、例えば風呂追い焚き時に貯湯タンク内で熱交換されて風呂伝熱通路が高温となる最高温度より高い所定温度を風呂追い焚き温度検出手段した場合、風呂伝熱通路途中で貯湯タンク内の高温水が流れ込んだと判断することができ、即ち、風呂伝熱通路途中の穴明きを検出することができるようになる。
【００１４】
つまり、この風呂追い焚き時に風呂追い焚き温度検出手段で検出した温度が所定温度以上になった場合は、風呂伝熱通路途中の穴明き異常として、異常報知手段によりランプ点灯や警告音の作動等で異常警告を行なうことで、使用者に報知することができ、安全性が向上する。
【００１５】
また、風呂追い焚き時に風呂追い焚き温度検出手段で検出した温度が所定温度以上になった場合、風呂伝熱通路遮断手段を作動させる構成としてあるので、風呂伝熱通路途中の穴明きを検出して、それによって、風呂伝熱通路遮断手段を作動させて、風呂の浴槽に貯湯タンク内の高温水が到達しないようにすることができるようになる。
【００１６】
つまり、風呂伝熱通路遮断手段を作動させることによって、風呂伝熱通路途中の穴明きから貯湯タンク内からの高温水が流れ込んだ分は、風呂伝熱通路遮断手段の作動、例えば貯湯タンク内の上部に配設した風呂伝熱通路の入り口と出口に配設した遮断弁を作動することで、風呂伝熱通路に閉じこめることができるようになる。
【００１７】
したがって、風呂浴槽内に高温水が到達することがなくなるので、使用者が高温水でやけどをしたり、浴槽内の水が溢れてしまう恐れが大幅に低減され、簡単な構成で安全性が向上する。
【００１８】
請求項２に記載の発明は、貯湯タンク内に水を供給する給水経路途中に給水遮断手段を設け、風呂追い焚き時に風呂追い焚き温度検出手段で検出した温度が所定温度以上になった時、前記給水遮断手段を作動させる構成としてある。
【００１９】
そして、風呂追い焚き時に風呂追い焚き温度検出手段で検出した温度が所定温度以上になった場合は、給水遮断手段を作動させる構成としてあるので、風呂伝熱通路経路途中の穴明きを検出して、それによって、給水遮断手段を作動させて、貯湯タンク内に給水を停止することができるようになる。
【００２０】
つまり、貯湯タンク内に給水が停止することによって、風呂伝熱通路途中の穴明きから貯湯タンク内からの高温水が流れ込む量が、貯湯タンク内の風呂伝熱通路途中の穴明き部分より上の部分の高温水のみとなり、風呂伝熱通路は貯湯タンク内の上部に配設してあることから、貯湯タンク内の高温水が風呂伝熱通路途中の穴明きから制限されるようになる。
【００２１】
したがって、風呂浴槽内に高温水が到達して使用者が高温水でやけどをしたり、浴槽内の水が溢れてしまうという恐れが大幅に低減され、簡単な構成で安全性が向上する。
【００２２】
【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。
【００２３】
（実施例１）
図１は本発明による実施例１の貯湯式温水器の断面図、図２は制御ブロック図である。
【００２４】
図１において、２１は給水配管、２１ａは給水遮断手段、２２は給水配管２１を底部に接続した貯湯タンクで、この給水遮断手段２１ａは給水配管２１経路途中に設け貯湯タンク２２への給水を遮断するようになっている。また、貯湯タンク２２の上部には、貯湯タンク２２内の大容量の水を加熱する電気ヒータ２３が配設され、貯湯タンク２２内の水は、タンクポンプ２４で貯湯タンク２２の下部より汲み上げられ貯湯タンク２２の上部へ循環されるようになっている。
【００２５】
２５は貯湯タンク２２の上部に接続した出湯配管で、所定の場所、例えば台所や風呂２６の給湯口等へとつながっており、当該出湯配管２５から出湯するとそれに伴い給水配管２１から貯湯タンク２２内に水が給水され、また、電気ヒータ２３は、タンクポンプ２４で供給された貯湯タンク２２の下部の冷たい水を加熱して、貯湯タンク２２の上部に戻すようになっていて、貯湯タンク２２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。
【００２６】
２７は風呂追い焚き手段で、この風呂追い焚き手段２７は、風呂ポンプ２８で取り出された風呂２６の浴槽の温水を貯湯タンク２２内の上部に配設した風呂伝熱通路２９の経路途中に形成した熱交換部２９ａ内に循環させて構成され、熱交換された高温となった風呂２６の温水を再び風呂２６の浴槽へ戻すようになっていて、また、風呂伝熱通路２９から風呂２６へ連結される配管経路の適所に風呂追い焚き温度検出手段３０が配設してある。
【００２７】
３１は操作部で、運転条件等を使用者が入力する入力部３１ａと運転状態等を表示する表示部３１ｂと異常警告を報知するランプ点灯と警告音の作動する異常報知手段３１ｃ等を配設してある。
【００２８】
３２は制御部で、操作部で入力された条件で、電気ヒータ２３やタンクポンプ２４や風呂ポンプ２８等を予め決められたシーケンスでコントロールするようになっている。
【００２９】
上記した構成において、通常は、午後２１時〜午前５時までの安価な深夜電力を使って電気ヒータ２３で大容量の水を加熱して貯湯タンク２２に貯湯し、温水として風呂２６等の給湯に利用するようになっていて、このとき、貯湯タンク２２の下部から水をタンクポンプ２４で汲み上げ貯湯タンク２２上部から電気ヒータ２３で加熱して、貯湯タンク２２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積層沸き上げを行うようになっている。
【００３０】
この貯湯タンク２２に蓄えられた高温水は、貯湯タンク２２の上部に接続した出湯配管
２５に接続された所定の場所、例えば台所や風呂２６の給湯口等から高温水として給湯に使用され、またその使用された分だけ給水配管２１から貯湯タンク２２内に水が給水されるようになっている。
【００３１】
そして、風呂２６に給湯された温水が冷めた場合には、風呂ポンプ２８で風呂２６の浴槽の温水を取り出し、貯湯タンク２２内の上部に配設した風呂伝熱通路２９内に循環させるようになっていて、貯湯タンク２２の上部の高温水と風呂２６の温水を熱交換して、風呂２６の温水の温度を上昇させ、風呂２６に再び戻して、風呂追い焚きを行うようにしてある。
【００３２】
また、制御部３２で、通常は、午後２１時〜午前５時までの安価な深夜電力を使って電気ヒータ２３で大容量の水を加熱して貯湯タンク２２に貯湯するなど操作部で入力された条件で、電気ヒータ２３やタンクポンプ２４や風呂ポンプ２８等を予め決められたシーケンスでコントロールするようになっていて、前述の風呂追いだき時には、風呂２６の温水との熱交換によって風呂伝熱通路２９近傍の温度が低下しようとする分を、電気ヒータ２３で加熱することで防止するようになっている。
【００３３】
ここで、風呂伝熱通路２９に風呂追いだき温度検出手段３０を配設してあるので、風呂追い焚き時に風呂追い焚き温度検出手段３０で検出した温度が所定温度以上の時、例えば風呂追い焚き時に貯湯タンク２２内で熱交換されて風呂伝熱通路２９が高温となる最高温度より高い所定温度を風呂追い焚き温度検出手段３０した場合、風呂伝熱通路２９経路途中に貯湯タンク２２内の高温水が流れ込んだと判断することができ、即ち、風呂伝熱通路２９経路途中の穴明きを検出することができるようになる。
【００３４】
つまり、この風呂追い焚き時に風呂追い焚き温度検出手段３０で検出した温度が所定温度以上の時、風呂伝熱通路２９経路途中の穴明き異常として、ランプ点灯や警告音の作動等の異常報知手段３１ｃで異常警告を報知することができるようになり、使用者に知らしめることができるので、安全性が向上する。
【００３５】
そしてまた、風呂追い焚き時に風呂追い焚き温度検出手段３０で検出した温度が所定温度以上の時、同時に給水遮断手段２１ａを作動させる構成としてあるので、風呂伝熱通路２９経路途中の穴明きを検出して、それによって、給水遮断手段２１ａを作動させて、貯湯タンク２２内に給水を停止することができるようになる。
【００３６】
つまり、貯湯タンク２２内に給水が停止することによって、風呂伝熱通路２９経路途中の穴明きから貯湯タンク２２内からの高温水が流れ込む量が、貯湯タンク２２内の風呂伝熱通路２９経路途中の穴明き部分より上の部分の高温水のみとなり、風呂伝熱通路２９は貯湯タンク２２内の上部に配設してあることから、貯湯タンク２２内の高温水が風呂伝熱通路２９経路途中の穴明きから制限されるようになる。
【００３７】
したがって、風呂２６浴槽内に高温水が到達して、使用者が高温水でやけどをしたり、浴槽内の水が溢れてしまう恐れが大幅に低減され、簡単な構成で、安全性が向上する。
【００３８】
なお、本実施例では貯湯タンク２２内の貯湯水の沸き上げ手段として、貯湯タンク２２内に配設した電気ヒータ２３を用いた場合について説明したが、沸き上げ手段としては上記電気ヒータ２３に限定されるものではなく、例えばヒートポンプユニットで沸き上げるようにしたものでも適用可能であり、その他、本発明の目的を達成するものであれば、どのような構成でもよいものである。
【００３９】
（実施例２）
図３は本発明の実施例２の貯湯式温水器の断面図である。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。
【００４０】
図３において、４１は貯湯タンク２２内の上部に配設した風呂伝熱通路２９の入り口に配設した入り口遮断弁で、４２は風呂伝熱通路２９の出口に配設した出口遮断弁で、これらを組み合わせることによって、風呂伝熱通路２９の流れを遮断する風呂伝熱通路遮断手段４３を構成するようになっていて、風呂追いだき時に風呂追い焚き温度検出手段３０で検出した温度が所定温度以上の時、この入り口遮断弁４１と出口遮断弁４２を閉止する構成としてある。
【００４１】
そして、風呂追い焚き時に風呂追いだき温度検出手段３０で検出した温度が所定温度以上の時、風呂伝熱通路遮断手段４３を作動させ入り口遮断弁４１と出口遮断弁４２を閉止する構成としてあるので、風呂伝熱通路２９経路途中の穴明きを検出して、それによって、風呂伝熱通路遮断手段４３作動させて、風呂の浴槽に貯湯タンク２２内の高温水が到達しないようにすることができるようになる。
【００４２】
つまり、風呂伝熱通路遮断手段４３を作動させることによって、風呂伝熱通路２９経路途中の穴明きから貯湯タンク２２内からの高温水が流れ込んだ分は、風呂伝熱通路遮断手段４３の作動、即ち、貯湯タンク２２内の上部に配設した風呂伝熱通路２９の入り口と出口に配設した入り口遮断弁４１と出口遮断弁４２を作動することで、風呂伝熱通路２９に閉じこめることができるようになる。
【００４３】
したがって、風呂浴槽内に高温水が到達することがなくなるので、実施例１よりもさらに、使用者が高温水でやけどをしたり、浴槽内の水があふれてしまう危険性が大幅に低減され、簡単な構成で、安全性が向上する。
【００４４】
なお、本発明の実施例では、異常報知手段３１ｃの作動と給水遮断手段２１ａの作動を同時に説明したがこれは個別に作動するようにしてもよく、また、風呂伝熱通路遮断手段４３の作動を個別に作動するように説明したがこれは、異常報知手段３１ｃの作動と給水遮断手段２１ａの作動を組み合わせてもよく、その他各部の構成も本発明の目的を達成する範囲であれば、その構成はどのようなものであってよい。
【００４５】
【発明の効果】
以上説明したように本発明によれば、風呂伝熱通路に風呂追い焚き温度検出手段を配設し、風呂追い焚き時に風呂追い焚き温度検出手段で検出した温度が所定温度以上の時、例えば風呂追いたき時に貯湯タンク内で熱交換されて風呂伝熱通路が高温となる最高温度より高い所定温度を風呂追いたき温度検出手段した場合、風呂伝熱通路途中に貯湯タンク内の高温水が流れ込んだと判断することができ、つまり、風呂伝熱通路経路途中の穴明きを検出することができるようになる。
【００４６】
さらに、この風呂追いたき時に風呂追いだき温度検出手段で検出した温度が所定温度以上の時、ランプ点灯や警告音の作動等の異常報知手段で異常として異常警告を報知することができるようになり、使用者に知らしめることができるので、安全性が向上する。
【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断面図
【図２】同貯湯式温水器の制御ブロック図
【図３】本発明の実施例２における貯湯式温水器の断面図
【図４】従来の実施例における貯湯式温水器の断面図
【符号の説明】
２１給水管（給水経路）
２１ａ給水遮断手段
２２貯湯タンク
２３電気ヒータ
２６風呂
２７風呂追い焚き手段
２９風呂伝熱通路
３０風呂追いだき温度検出手段
３１ｃ異常報知手段
４３風呂伝熱通路遮断手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water storage type hot water heater provided with a heat exchanger in a hot water storage tank for reheating a bath.
[0002]
[Prior art]
The conventional water heater shown in FIG. 4 will be described. The electric water heater has an upper part and a lower part in a cylindrical tank 1 having a required capacity, and an upper part for heating the water in the tank 1 to a set temperature. A heater 2 and a lower heater 3 are provided, and a spiral heat exchanger 4 is provided above the upper heater 2 to heat water supplied from the outside of the tank 1 with hot water stored in the tank 1. Has been established.
[0003]
The tank 1 of the electric water heater is provided with a water supply pipe 5 at the bottom position and a hot water discharge pipe 6 at the upper position so that the hot water in the tank 1 is pushed up by supplying water from the water supply pipe 5, Like to do.
[0004]
On the other hand, the heat exchanger 4 is formed in a spiral shape, and is arranged so that the central axis of the spirally formed heat exchanger 4 substantially coincides with the central axis of the tank 1. In this case, it is preferable to set the winding diameter d of the heat exchanger 4 formed in a spiral shape to a dimension that is 1/2 or more of the inner diameter D of the tank 1. Thereby, the hot water cooled by the heat exchange around the heat exchanger 4 becomes a downward flow, and an upward flow is generated in the center of the heat exchanger 4 corresponding to the downward flow, and is stored in the tank 1. Due to the convection of the hot water, the circulation of the hot water is well maintained, and heat exchange can be performed efficiently and reliably. Further, the temperature sensor 7 attached to the body of the tank 1 can quickly and accurately detect the temperature drop, and additional heating by the upper heater 2 and / or the lower heater 3 is performed as necessary. Can be appropriately implemented (see, for example, Patent Document 1).
[0005]
[Patent Document 1]
JP 2002-48414 A (page 4, FIG. 1)
[0006]
[Problems to be solved by the invention]
However, in the bath follow-up means for exchanging heat between the hot water in the upper part of the tank 1 of the conventional hot-water storage water heater and the hot water in the bath, the heat exchanger 4 located in the tank 1 has a hole due to corrosion over time. Since the pressure in the tank 1 is higher than the pressure in the heat exchanger 4, there is a possibility that the high temperature water in the tank 1 flows into the heat exchanger 4, and this high temperature water flows into the heat exchanger 4. Then, there was a concern that hot water was mixed in the bath tub and the bath water temperature rose abnormally or the water in the bath overflowed.
[0007]
Here, the portion of the tank 1 where the high temperature water is used is supplied from the water supply pipe 5, and the high temperature water in the tank 1 is converted into a heat exchanger by the perforation of the heat exchanger 4. Similarly, the water that has flowed into the tank 4 is also supplied from the water supply pipe 5, so that the hot water in the tank 1 flows into the bathtub more rapidly due to the perforation of the heat exchanger 4. There was a concern that the water in the house overflowed, causing water leaks downstairs and consuming a large amount of tap water.
[0008]
The present invention solves the above-mentioned problems, and aims to improve the safety by detecting the perforation of the heat exchanger 4.
[0009]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention solves the above-described problems. A hot water storage tank, heating means for supplying water at the upper part of the hot water storage tank to the upper part of the hot water storage tank and heating it to raise the temperature from the upper part of the hot water storage tank, A bath heat transfer passage that circulates the hot water of the bath at the time of firing and exchanges heat with the hot water in the hot water storage tank to increase the temperature of the hot water of the bath, and a bath heat transfer passage blocking means that blocks the flow of the bath heat transfer passage; A bath reheating temperature detecting means is disposed in the bath heat transfer passage, and the temperature detected by the bath reheating temperature detecting means at the time of bathing is lower than the boiling temperature of the hot water and higher than the set temperature of the bath If equal to or higher than a predetermined temperature, as well as arranged an abnormality informing means for informing the abnormality warning is determined to be abnormal, when the temperature detected by the bath reheating temperature detecting means becomes higher than a predetermined temperature, the bath It is characterized in that operating the heat passage interrupting means.
[0010]
According to the above invention, when the temperature detected by the bath reheating temperature detecting means disposed in the bath heat transfer passage at the time of bath reheating becomes a predetermined temperature or more, for example, heat is exchanged in the hot water storage tank at the time of reheating the bath. When the bath temperature is detected at a predetermined temperature higher than the maximum temperature at which the bath heat transfer passage becomes hot, it can be determined that hot water in the hot water storage tank has flown in the middle of the bath heat transfer passage. Drilling in the middle of the heat path can be detected.
[0011]
In other words, if the temperature detected by the bath reheating temperature detecting means exceeds the predetermined temperature during the bath reheating, the abnormality notifying means activates the lamp lighting or warning sound as a perforation abnormality in the bath heat transfer passage By giving an abnormality warning, etc., the user can be notified and safety is improved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is a hot water storage tank, heating means for supplying water at the upper part of the hot water storage tank to the upper part of the hot water storage tank and heating it to raise the temperature from the upper part of the hot water storage tank. A bath heat transfer passage that circulates hot water in the bath and exchanges heat with hot water in the hot water storage tank to raise the temperature of the hot water in the bath, and a bath heat transfer passage blocking means that blocks the flow of the bath heat transfer passage The bath reheating temperature detecting means is disposed in the bath heat transfer passage, and the temperature detected by the bath reheating temperature detecting means at the time of bathing is lower than the boiling temperature of the hot water and higher than the set temperature of the bath When the temperature becomes above, an abnormality notification means for determining an abnormality and notifying an abnormality warning is provided, and when the temperature detected by the bath reheating temperature detection means exceeds a predetermined temperature, the bath heat transfer passage Blocking It is characterized in that operating means.
[0013]
And when the temperature detected by the bath reheating temperature detecting means arranged in the bath heat transfer passage at the time of bath reheating becomes a predetermined temperature or more, for example, heat is exchanged in the hot water storage tank at the time of bath retreating When the bath reheating temperature detection means is set to a predetermined temperature higher than the maximum temperature at which the temperature is high, it can be determined that hot water in the hot water storage tank has flown in the middle of the bath heat transfer passage, that is, in the middle of the bath heat transfer passage. Drilling can be detected.
[0014]
In other words, if the temperature detected by the bath reheating temperature detecting means exceeds the predetermined temperature during the bath reheating, the abnormality notifying means activates the lamp lighting or warning sound as a perforation abnormality in the bath heat transfer passage By giving an abnormality warning, etc., the user can be notified and safety is improved.
[0015]
In addition, when the temperature detected by the bath reheating temperature detection means exceeds the specified temperature during bath reheating, the bath heat transfer passage shut-off means is activated so that perforations in the middle of the bath heat transfer passage are detected. Thus, the bath heat transfer passage blocking means can be operated so that the hot water in the hot water storage tank does not reach the bath tub.
[0016]
That is, by operating the bath heat transfer passage blocking means, the amount of hot water flowing from the hot water storage tank through the hole in the middle of the bath heat transfer passage is the operation of the bath heat transfer passage blocking means, for example, in the hot water storage tank. By operating the shut-off valves provided at the entrance and exit of the bath heat transfer passage disposed at the top of the bath, the bath heat transfer passage can be confined.
[0017]
Therefore, since hot water does not reach the bath tub, the risk of users getting burned with hot water or overflowing water in the tub is greatly reduced, and safety is improved with a simple configuration. To do.
[0018]
The invention according to claim 2 is provided with a water supply blocking means in the middle of a water supply path for supplying water into the hot water storage tank, and when the temperature detected by the bath reheating temperature detecting means at the time of retreating the bath becomes a predetermined temperature or more, The water supply blocking means is operated.
[0019]
And, when the temperature detected by the bath reheating temperature detecting means at the time of bath reheating exceeds a predetermined temperature, the water supply shut-off means is configured to operate, so that a hole in the middle of the bath heat transfer path is detected. As a result, the water supply shut-off means can be operated to stop the water supply in the hot water storage tank.
[0020]
In other words, the amount of hot water flowing from the hot water tank through the hole in the middle of the bath heat transfer passage is less than the hole in the middle of the bath heat transfer passage in the hot water tank when the water supply stops in the hot water tank. Since only the hot water in the upper part is provided, and the bath heat transfer passage is located in the upper part of the hot water storage tank, the hot water in the hot water storage tank is restricted from being drilled in the middle of the bath heat transfer passage. Become.
[0021]
Therefore, the possibility that the hot water reaches the bath tub and the user burns with the hot water or the water in the tub overflows is greatly reduced, and the safety is improved with a simple configuration.
[0022]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0023]
Example 1
FIG. 1 is a cross-sectional view of a hot water heater according to a first embodiment of the present invention, and FIG. 2 is a control block diagram.
[0024]
In FIG. 1, 21 is a water supply pipe, 21a is a water supply shut-off means, 22 is a hot water storage tank connected to the bottom of the water supply pipe 21, and this water supply shut-off means 21a is provided in the course of the water supply pipe 21 to shut off the water supply to the hot water storage tank 22. It is supposed to be. In addition, an electric heater 23 for heating a large volume of water in the hot water storage tank 22 is disposed at the upper part of the hot water storage tank 22, and the water in the hot water storage tank 22 is pumped from the lower part of the hot water storage tank 22 by the tank pump 24. It is circulated to the upper part of the hot water storage tank 22.
[0025]
A hot water supply pipe 25 connected to the upper part of the hot water storage tank 22 is connected to a predetermined place, for example, a hot water outlet of a kitchen or a bath 26. When the hot water is discharged from the hot water supply pipe 25, the hot water supply pipe 21 is connected to the hot water storage tank 22 accordingly. The electric heater 23 heats the cold water in the lower part of the hot water storage tank 22 supplied by the tank pump 24 and returns it to the upper part of the hot water storage tank 22. Then, from the specific gravity difference, hot water is collected in the upper part and water is separated in the lower part.
[0026]
27 is a bath reheating means, and this bath retreating means 27 is formed in the middle of the path of the bath heat transfer passage 29 in which the hot water of the bathtub of the bath 26 taken out by the bath pump 28 is arranged in the upper part of the hot water storage tank 22. The hot water of the bath 26 that has been configured to circulate in the heat exchanging portion 29a and has been subjected to heat exchange is returned to the bath 26 bath again, and from the bath heat transfer passage 29 to the bath 26. A bath reheating temperature detecting means 30 is disposed at an appropriate place in the connected piping route.
[0027]
An operation unit 31 includes an input unit 31a for a user to input driving conditions, a display unit 31b for displaying a driving state, an abnormality notification unit 31c for operating a lamp and a warning sound to notify an abnormality warning, and the like. It is.
[0028]
Reference numeral 32 denotes a control unit which controls the electric heater 23, the tank pump 24, the bath pump 28, and the like in a predetermined sequence under the conditions input by the operation unit.
[0029]
In the above-described configuration, normally, a large amount of water is heated by the electric heater 23 using inexpensive late-night power from 21 pm to 5 am and stored in the hot water storage tank 22, and hot water such as the bath 26 is supplied as hot water. At this time, water is pumped from the lower part of the hot water storage tank 22 by the tank pump 24 and heated from the upper part of the hot water storage tank 22 by the electric heater 23. Laminate boiling is performed so that water accumulates in a separated state at the bottom.
[0030]
The hot water stored in the hot water storage tank 22 is used for hot water supply as high temperature water from a predetermined place connected to the hot water supply pipe 25 connected to the upper part of the hot water storage tank 22, for example, a hot water outlet of a kitchen or a bath 26, etc. Water is supplied from the water supply pipe 21 into the hot water storage tank 22 by the amount used.
[0031]
When the hot water supplied to the bath 26 is cooled, the hot water in the bathtub 26 is taken out by the bath pump 28 and is circulated in the bath heat transfer passage 29 disposed in the upper part of the hot water storage tank 22. Then, the hot water in the upper part of the hot water storage tank 22 and the hot water in the bath 26 are heat-exchanged to raise the temperature of the hot water in the bath 26 and return to the bath 26 to retreat the bath.
[0032]
In addition, the control unit 32 normally inputs the operation unit such as heating the large volume of water with the electric heater 23 using the inexpensive late-night power from 21 pm to 5 am to store the hot water in the hot water storage tank 22. The electric heater 23, the tank pump 24, the bath pump 28, etc. are controlled in a predetermined sequence under the above-mentioned conditions. When the bath is chased, the heat transfer with the hot water in the bath 26 is performed. The electric heater 23 is used to prevent the temperature near the passage 29 from being lowered by heating with the electric heater 23.
[0033]
Here, since the bath chasing temperature detecting means 30 is arranged in the bath heat transfer passage 29, when the temperature detected by the bath chasing temperature detecting means 30 is higher than a predetermined temperature when bathing, for example, bath chasing When the predetermined temperature higher than the maximum temperature at which the bath heat transfer passage 29 becomes high temperature is sometimes exchanged in the hot water storage tank 22 and the bath reheating temperature detecting means 30 is used, the hot temperature in the hot water storage tank 22 is in the middle of the bath heat transfer passage 29 path. It can be determined that water has flowed in, that is, a hole in the middle of the bath heat transfer passage 29 can be detected.
[0034]
That is, when the temperature detected by the bath reheating temperature detecting means 30 during the reheating of the bath is equal to or higher than a predetermined temperature, an abnormality notification such as a lamp lighting or a warning sound is generated as a perforation abnormality in the course of the bath heat transfer passage 29. An abnormality warning can be notified by the means 31c, and the user can be informed, so that safety is improved.
[0035]
In addition, when the temperature detected by the bath reheating temperature detection means 30 during the bath reheating is higher than a predetermined temperature, the water supply shut-off means 21a is operated at the same time. As a result, the water supply shut-off means 21 a can be operated to stop the water supply in the hot water storage tank 22.
[0036]
That is, the amount of high-temperature water flowing from the hot water storage tank 22 through the hole in the middle of the path of the bath heat transfer passage 29 when the water supply stops in the hot water storage tank 22 is the path of the bath heat transfer passage 29 in the hot water storage tank 22. Since only the high temperature water above the perforated part in the middle is provided, and the bath heat transfer passage 29 is disposed in the upper part of the hot water storage tank 22, the high temperature water in the hot water storage tank 22 is transferred to the bath heat transfer passage 29. It is restricted from drilling in the middle of the route.
[0037]
Therefore, the possibility that the hot water reaches the bathtub 26 and burns with the hot water or the water in the bathtub overflows is greatly reduced, and the safety is improved with a simple configuration. .
[0038]
In the present embodiment, the case where the electric heater 23 disposed in the hot water storage tank 22 is used as the hot water boiling means in the hot water storage tank 22 has been described. However, the heating means is limited to the electric heater 23 described above. For example, it is possible to use a heat pump unit that is heated up, and any other configuration that can achieve the object of the present invention can be used.
[0039]
(Example 2)
FIG. 3 is a cross-sectional view of a hot water storage water heater according to a 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.
[0040]
In FIG. 3, 41 is an inlet shut-off valve disposed at the entrance of the bath heat transfer passage 29 disposed at the upper part of the hot water storage tank 22, and 42 is an exit shut-off valve disposed at the exit of the bath heat transfer passage 29. By combining these, the bath heat transfer passage blocking means 43 for blocking the flow of the bath heat transfer passage 29 is configured, and the temperature detected by the bath reheating temperature detection means 30 at the time of bathing is a predetermined temperature. At this time, the inlet cutoff valve 41 and the outlet cutoff valve 42 are closed.
[0041]
And, when the temperature detected by the bath chasing temperature detecting means 30 at the time of bathing is higher than a predetermined temperature, the bath heat transfer passage blocking means 43 is operated to close the inlet shut-off valve 41 and the outlet shut-off valve 42. Detecting perforations in the middle of the bath heat transfer passage 29 and thereby operating the bath heat transfer passage blocking means 43 so that the hot water in the hot water storage tank 22 does not reach the bath tub. become able to.
[0042]
That is, by operating the bath heat transfer passage blocking means 43, the amount of hot water flowing from the hot water storage tank 22 through the perforations in the path of the bath heat transfer passage 29 is activated by the operation of the bath heat transfer passage blocking means 43. In other words, the bath heat transfer passage 29 can be confined by operating the inlet shut-off valve 41 and the outlet shut-off valve 42 provided at the entrance and exit of the bath heat transfer passage 29 disposed in the upper part of the hot water storage tank 22. become able to.
[0043]
Therefore, since hot water does not reach the bath tub, the risk that the user gets burned with hot water or the water in the tub overflows much more than in Example 1, A simple configuration improves safety.
[0044]
In the embodiment of the present invention, the operation of the abnormality notifying unit 31c and the operation of the water supply blocking unit 21a have been described at the same time. However, this may be individually operated, and the operation of the bath heat transfer path blocking unit 43 may be performed. However, this may be a combination of the operation of the abnormality notifying means 31c and the operation of the water supply blocking means 21a. Any configuration can be used.
[0045]
【The invention's effect】
As described above, according to the present invention, the bath reheating temperature detecting means is disposed in the bath heat transfer passage, and when the temperature detected by the bath reheating temperature detecting means at the time of retreating the bath is equal to or higher than a predetermined temperature, for example, a bath When the temperature is detected after the bath is chased at a predetermined temperature higher than the maximum temperature at which the bath heat transfer passage becomes hot due to heat exchange in the hot water storage tank during the chasing, the hot water in the hot water tank flows into the bath heat passage. That is, it becomes possible to detect a hole in the middle of the bath heat transfer path.
[0046]
Furthermore, when the temperature detected by the bath chase temperature detecting means is higher than a predetermined temperature when the bath is chased, an abnormality warning can be notified as an abnormality by an abnormality notifying means such as lamp lighting or warning sound operation. Since it can be informed to the user, safety is improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a hot water heater according to a first embodiment of the present invention. FIG. 2 is a control block diagram of the hot water heater according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view of a hot water heater in a conventional example.
21 Water supply pipe (water supply route)
21a Water supply shut-off means 22 Hot water storage tank 23 Electric heater 26 Bath 27 Bath reheating means 29 Bath heat transfer passage 30 Bath follow-up temperature detection means 31c Abnormality alarm means 43 Bath heat transfer passage shut-off means

Claims

A hot water storage tank, a heating means that supplies water from the lower part of the hot water tank to the upper part of the hot water tank and heats it up to a high temperature from the upper part of the hot water storage tank. A bath heat transfer passage for exchanging heat with the hot water of the bath to raise the temperature of the hot water in the bath, and a bath heat transfer passage blocking means for blocking the flow of the bath heat transfer passage. If a temperature detection means is provided and the temperature detected by the bath temperature detection means at the time of bathing is above a predetermined temperature lower than the boiling water boiling temperature and higher than the bath set temperature, it is judged as abnormal. Japanese with disposing the abnormality informing means for informing the error warning and, when the temperature detected by the bath reheating temperature detecting means exceeds a predetermined temperature, to operate the bath heat transfer passage shutoff means Hot water storage type water heater to be.

A water supply cutoff means is provided in the middle of the water supply path for supplying water into the hot water storage tank, and the water supply cutoff means is activated when the temperature detected by the bath reheating temperature detection means becomes higher than a predetermined temperature at the time of bathing. The hot water storage water heater according to claim 1.