JP4013840B2

JP4013840B2 - Hot water heater

Info

Publication number: JP4013840B2
Application number: JP2003173190A
Authority: JP
Inventors: 敏克福永; 武彦重岡
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2003-06-18
Filing date: 2003-06-18
Publication date: 2007-11-28
Anticipated expiration: 2023-06-18
Also published as: JP2005009741A

Description

【０００１】
【発明の属する技術分野】
本発明は、深夜電力等を利用して湯を沸かす貯湯式温水器で、特に、家庭用風呂追い焚き装置を備えたものに関するものである。
【０００２】
【従来の技術】
従来の構成を電気貯湯式温水器を用いて、図４により説明する。図に示すように、この電気貯湯式温水器は、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とをそれぞれ配設するとともに、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上部の高温水と風呂の浴槽水を熱交換する風呂追い焚き手段では、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明くと、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危険性があった。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、浴槽内の水があふ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、水道代が嵩んだりする心配があった。
【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、貯湯タンク内に風呂追い焚き用の熱交換器を内蔵した貯湯式温水器において、給水経路途中に設けた給水流量検出手段と、出湯経路途中に設けた出湯流量検出手段とを備え、前記給水流量検出手段で検出した給水流量が前記出湯流量検出手段で検出した出湯流量より多い場合、異常として異常警告を報知するランプ点灯や警告音の作動等の異常報知手段を配設した構成としてある。
【００１０】
上記発明によれば、給水経路途中に設けた給水流量検出手段で検出した給水流量と、出湯経路途中に設けた出湯流量検出手段で検出した出湯流量を比較し、給水量の方が多い場合、風呂伝熱通路経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、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。そして、ランプ点灯や警告音の作動等の異常報知手段で異常警告を報知することで、多量の水漏れ事故が発生する前に使用者に知らしめることができ、安全性が向上する。
【００１１】
【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、前記貯湯タンク下部の水を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、貯湯タンク内の上部に配設し風呂追い焚き時に浴槽水を循環させ貯湯タンクの上部の高温水と熱交換して昇温する風呂伝熱通路と、給水経路途中に設けた給水流量検出手段と、出湯経路途中に設けた出湯流量検出手段とを備え、前記給水流量検出手段で検出した給水流量が前記出湯流量検出手段で検出した出湯流量より多い場合、異常として異常警告を報知するランプ点灯や警告音の作動等の異常報知手段を配設したことを特徴とするものであり、給水流量検出手段で検出した給水流量と、出湯流量検出手段で検出した出湯流量を比較し、給水量の方が多い場合、風呂伝熱通路経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、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。そして、ランプ点灯や警告音の作動等の異常報知手段で異常警告を報知することで、多量の水漏れ事故が発生する前に使用者に知らしめることができ、安全性が向上する。
【００１２】
請求項２に記載の発明は、給水経路途中に給水経路を遮断する給水遮断手段を設け、給水流量検出手段で検出した給水流量が出湯流量検出手段で検出した出湯流量より多い場合、給水遮断手段を作動させる構成としたもので、風呂伝熱通路経路途中の穴明きを確実に検出することができ、穴あき異常時は給水遮断手段により貯湯タンク内への給水を停止することができるため、より安全性が向上する。
【００１３】
つまり、貯湯タンク内に給水が停止することによって、風呂伝熱通路経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経路途中の穴明きから制限されるようになる。
【００１４】
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。
【００１５】
請求項３に記載の発明は、風呂伝熱通路の流れを遮断する風呂伝熱通路遮断手段を配設し、給水流量検出手段で検出した給水流量が出湯流量検出手段で検出した出湯流量より多い場合、風呂伝熱通路遮断手段を作動させる構成としてある。
【００１６】
そして、給水流量検出手段で検出した給水流量が出湯流量検出手段で検出した出湯流量より多い場合、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。
【００１７】
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、風呂伝熱通路経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。
【００１８】
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、請求項２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。
【００１９】
【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。
【００２０】
（実施例１）
図１は本発明の実施例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。
【００２１】
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。
【００２２】
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。
【００２３】
２７は風呂追いだき手段で、この風呂追いだき手段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る。
【００２４】
また、貯湯タンク２２の水量の出入りを検出するため、貯湯タンク２２内の下部に位置し貯湯タンク２２内に水を供給する給水配管２１経路途中に給水流量を検出する給水流量検出手段３０ａと、貯湯タンク２２内の上部に位置し貯湯タンク２２内から高温水を出湯する出湯配管２５経路途中に出湯流量を検出する出湯流量検出手段３０ｂが配設されている。
【００２５】
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。
【００２６】
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。
【００２７】
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。
【００２８】
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。
【００２９】
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、風呂追いだきを行うようにしてある。
【００３０】
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。
【００３１】
ここで、貯湯タンク２２内の下部に位置し貯湯タンク２２内に水を供給する給水配管２１経路途中に給水流量を検出する給水流量検出手段３０ａと、貯湯タンク２２内の上部に位置し貯湯タンク２２内から高温水を出湯する出湯配管２５経路途中に出湯流量を検出する出湯流量検出手段３０ｂを設けてあるので、給水流量検出手段３０ａで検出した給水流量が出湯流量検出手段３０ｂで検出した出湯流量より多い場合、風呂伝熱通路経路２９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、風呂伝熱通路経路２９途中の穴明きを検出することができるようになる。
【００３２】
つまり、給水流量検出手段３０ａで検出した給水流量が出湯流量検出手段３０ｂで検出した出湯流量より多い場合、風呂伝熱通路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。
【００３３】
そしてまた、給水流量検出手段３０ａで検出した給水流量が出湯流量検出手段３０ｂで検出した出湯流量より多い場合、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、風呂伝熱通路経路２９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。
【００３４】
つまり、貯湯タンク２２内に給水が停止することによって、風呂伝熱通路経路２９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経路途中の穴明きから制限されるようになる。
【００３５】
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。
【００３６】
（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。
【００３７】
図４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、給水流量検出手段３０ａで検出した給水流量が出湯流量検出手段３０ｂで検出した出湯流量より多い場合、風呂伝熱通路遮断手段４３を作動させる構成としてある。
【００３８】
そして、給水流量検出手段３０ａで検出した給水流量が出湯流量検出手段３０ｂで検出した出湯流量より多い場合、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２６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。
【００３９】
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。
【００４０】
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。
【００４１】
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。
【００４２】
【発明の効果】
以上のように本発明によれば、貯湯タンク内の下部に位置し貯湯タンク内に水を供給する給水経路途中に給水流量を検出する給水流量検出手段と、貯湯タンク内の上部に位置し貯湯タンク内から高温水を出湯する出湯経路途中に出湯流量を検出する出湯流量検出手段を設けてあるので、給水流量検出手段で検出した給水流量が出湯流量検出手段で検出した出湯流量より多い場合、風呂伝熱通路経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、即ち、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。
【００４３】
つまり、給水流量検出手段で検出した給水流量が出湯流量検出手段で検出した出湯流量より多い場合、風呂伝熱通路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。
【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
３０ａ給水流量検出手段
３０ｂ出湯流量検出手段
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 water heater for boiling hot water using midnight power or the like, and more particularly, to a device equipped with a household bath reheating device.
[0002]
[Prior art]
A conventional configuration will be described with reference to FIG. 4 using an electric hot water heater. As shown in the figure, this electric hot water heater has an upper heater 2 and a lower heater for heating the water in the tank 1 to a set temperature at the upper and lower portions in a cylindrical tank 1 having a required capacity. 3 and a spiral heat exchanger 4 that heats water supplied from the outside of the tank 1 with hot water stored in the tank 1 above the upper heater 2. Yes.
[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 reheating means for exchanging heat between the hot water at the upper part of the tank 1 of the conventional hot water heater and the bath water of the bath, the heat exchanger 4 located in the tank 1 has a hole due to corrosion over time. In particular, since the pressure in the tank 1 is higher than the pressure in the heat exchanger 4, there is a risk that the high-temperature water in the tank 1 flows into the heat exchanger 4. When the hot water flows into the heat exchanger 4, the hot water reaches the bath tub, and there is a concern that the user may get burned with the hot water or the water in the tub overflows.
[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 inside would overflow, causing water leaks downstairs and increasing water bills.
[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]
The present invention solves the above problems, and in a hot water storage hot water heater having a built-in heat exchanger for bathing in a hot water storage tank, a water supply flow rate detecting means provided in the middle of the water supply path, and a hot water supply path provided in the middle of the hot water supply path A hot water flow rate detection means, and when the feed water flow rate detected by the feed water flow rate detection means is greater than the hot water flow rate detected by the hot water flow rate detection means, an abnormality such as a lamp lighting or an alarm sound operation as an abnormality is reported. The notification means is provided.
[0010]
According to the above invention, the feed water flow rate detected by the feed water flow rate detecting means provided in the middle of the feed water path is compared with the tapping water flow rate detected by the tapping water flow rate detecting means provided in the middle of the tapping water path, and the amount of the feed water is greater. It can be determined that high-temperature water in the hot water storage tank has flowed into the bath heat transfer passage route, and a hole in the bath heat transfer passage route can be detected. Then, by notifying the abnormality warning by means of abnormality notification such as lamp operation or warning sound operation, the user can be informed before a large amount of water leakage accident occurs, and safety is improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is a hot water storage tank, heating means for supplying water at the lower part of the hot water storage tank to the upper part and heating it to increase the temperature from the upper part of the hot water storage tank, and a reheating bath provided at the upper part of the hot water storage tank. A bath heat transfer passage that circulates the bath water from time to time to exchange heat with the high-temperature water at the top of the hot water tank and raise the temperature, a feed water flow rate detection means provided in the middle of the water supply path, and a hot water flow rate detection means provided in the middle of the hot water supply path When the feed water flow rate detected by the feed water flow rate detection means is greater than the tapping flow rate detected by the tapping water flow rate detection means, an abnormality notification means such as a lamp lighting or warning sound operation is provided as an abnormality. Compared to the hot water flow rate detected by the hot water flow rate detection means and the hot water flow rate detected by the hot water flow rate detection means, In the tank It is possible to determine that flowed high temperature water, it is possible to detect the bath heat transfer passage path middle of perforated. Then, by notifying the abnormality warning by means of abnormality notification such as lamp operation or warning sound operation, the user can be informed before a large amount of water leakage accident occurs, and safety is improved.
[0012]
The invention according to claim 2 is provided with water supply blocking means for blocking the water supply path in the middle of the water supply path, and when the water supply flow rate detected by the water supply flow rate detection means is larger than the hot water flow rate detected by the hot water flow rate detection means, Since it is configured to operate, it can reliably detect the drilling in the middle of the bath heat transfer path and can stop the water supply to the hot water storage tank by the water supply shut-off means when the hole is abnormal , Improve safety.
[0013]
In other words, the amount of hot water flowing from the hot water tank through the hole in the bath heat transfer path is reduced by the stoppage of the water supply in the hot water tank. Since only the hot water in the upper part of the bath is located 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 so.
[0014]
Therefore, the risk of hot water reaching the bath tub and the user getting burned with hot water or overflowing water in the tub is greatly reduced, and the safety is improved with a simple configuration. .
[0015]
The invention according to claim 3 is provided with bath heat transfer passage blocking means for blocking the flow of the bath heat transfer passage, and the supply water flow rate detected by the supply water flow rate detection unit is larger than the hot water flow rate detected by the hot water flow rate detection unit. In this case, the bath heat transfer passage blocking means is operated.
[0016]
And when the feed water flow rate detected by the feed water flow rate detection means is larger than the hot water flow rate detected by the hot water flow rate detection means, the bath heat transfer passage blocking means is configured to operate. Thus, it is possible to activate the bath heat transfer passage blocking means so that the hot water in the hot water storage tank does not reach the bath tub.
[0017]
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 route is activated by the bath heat transfer passage blocking means, for example, the hot water storage tank. By operating the shut-off valves provided at the entrance and exit of the bath heat transfer passage disposed in the upper part of the inside, the bath heat transfer passage can be confined.
[0018]
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 is further reduced than in claim 2. A simple configuration improves safety.
[0019]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0020]
Example 1
FIG. 1 is a cross-sectional view of a hot water storage type water heater according to Embodiment 1 of the present invention, and FIG. 2 is a control block diagram.
[0021]
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.
[0022]
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.
[0023]
The bath pursuit 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 exchange unit 29a and has been subjected to heat exchange is returned to the bathtub of the bath 26 again.
[0024]
In addition, in order to detect the amount of water in and out of the hot water storage tank 22, a water supply flow rate detecting means 30 a for detecting the water supply flow rate in the middle of the water supply pipe 21 route located in the lower part of the hot water storage tank 22 and supplying water into the hot water storage tank 22, A hot water flow rate detecting means 30b for detecting the hot water flow rate is arranged in the middle of the hot water piping 25 where hot water is discharged from the hot water storage tank 22 and located in the upper part of the hot water storage tank 22.
[0025]
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.
[0026]
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.
[0027]
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.
[0028]
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.
[0029]
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 perform the bath chasing.
[0030]
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.
[0031]
Here, the hot water storage tank 22 is located at the lower part of the hot water storage tank 22 and is located at the upper part of the hot water storage tank 22. The hot water flow rate detecting means 30b for detecting the hot water flow rate is provided in the middle of the hot water piping 25 for hot water from the inside 22 so that the hot water flow rate detected by the feed water flow rate detecting means 30a is detected by the hot water flow rate detecting means 30b. If the flow rate is higher than the flow rate, it can be determined that the hot water in the hot water storage tank 22 has flown into the bath heat transfer passage 29, that is, the perforation in the bath heat transfer passage 29 can be detected. become.
[0032]
In other words, when the feed water flow rate detected by the feed water flow rate detection means 30a is larger than the hot water flow rate detected by the hot water flow rate detection means 30b, an abnormality such as a lamp lighting or an operation of a warning sound is caused as a perforation abnormality in the bath heat transfer path. Since the abnormality warning can be notified by the notification means and the user can be notified, the safety is improved.
[0033]
In addition, when the feed water flow rate detected by the feed water flow rate detection means 30a is larger than the hot water flow rate detected by the hot water flow rate detection means 30b, the feed water cutoff means 21a is operated at the same time. By detecting the perforation, it becomes possible to operate the water supply blocking means 21 a and stop the water supply in the hot water storage tank 22.
[0034]
That is, the amount of high-temperature water flowing from the hot water storage tank 22 through the hole in the middle of the bath heat transfer passage 29 when the water supply is stopped in the hot water storage tank 22 is in the middle of the bath heat transfer passage route in the hot water storage tank 22. Since only the hot water in the portion above the perforated portion of the hot water is provided and the bath heat transfer passage is disposed in the upper part of the hot water storage tank 22, the hot water in the hot water storage tank 22 is in the middle of the bath heat transfer passage route. Be limited to drilling.
[0035]
Therefore, the risk of hot water reaching the bath tub and the user getting burned with hot water or overflowing water in the tub is greatly reduced, and the safety is improved with a simple configuration. .
[0036]
(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.
[0037]
In FIG. 4, 41 is an inlet shut-off valve disposed at the entrance of the bath heat transfer passage 29 disposed at the upper portion 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 that blocks the flow of the bath heat transfer passage 29 is configured, and the feed water flow rate detected by the feed water flow rate detection means 30a is detected by the hot water flow rate detection means 30b. When the flow rate is higher than the discharged hot water flow rate, the bath heat transfer passage blocking means 43 is activated.
[0038]
When the feed water flow rate detected by the feed water flow rate detection means 30a is larger than the hot water flow rate detected by the hot water flow rate detection means 30b, the bath heat transfer passage blocking means 43 is operated to close the inlet cutoff valve 41 and the outlet cutoff valve 42. Therefore, the perforation in the middle of the bath heat transfer passage 29 is detected, and thereby the bath heat transfer passage blocking means 43 is operated so that the hot water in the hot water storage tank 22 does not reach the bathtub of the bath 26. To be able to.
[0039]
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.
[0040]
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.
[0041]
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.
[0042]
【The invention's effect】
As described above, according to the present invention, the feed water flow rate detecting means for detecting the feed water flow rate in the middle of the feed path for supplying water into the hot water storage tank located in the lower part of the hot water storage tank, and the hot water storage Since there is a tapping flow rate detecting means for detecting the tapping flow rate in the middle of the tapping path for discharging hot water from the tank, when the feed water flow rate detected by the feed water flow rate detecting means is greater than the tapping flow rate detected by the tapping flow rate detecting means, It can be determined that the high-temperature water in the hot water storage tank has flowed into the bath heat transfer passage route, that is, it is possible to detect perforation in the bath heat transfer passage route.
[0043]
In other words, if the feed water flow rate detected by the feed water flow rate detection means is greater than the hot water flow rate detected by the hot water flow rate detection means, an abnormality notification means such as lamp lighting or warning sound operation as a perforation abnormality in the bath heat transfer path route Thus, an abnormality warning can be notified and the user can be informed, so that 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 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 30a Water supply flow rate detection means 30b Hot water flow rate detection means 31c Abnormality notification means 43 Bath heat transfer passage cut-off means

Claims

貯湯タンクと、前記貯湯タンク下部の水を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、貯湯タンク内の上部に配設し風呂追い焚き時に浴槽水を循環させ貯湯タンクの上部の高温水と熱交換して昇温する風呂伝熱通路と、給水経路途中に設けた給水流量検出手段と、出湯経路途中に設けた出湯流量検出手段とを備え、前記給水流量検出手段で検出した給水流量が前記出湯流量検出手段で検出した出湯流量より多い場合、異常として異常警告を報知するランプ点灯や警告音の作動等の異常報知手段を配設してなる貯湯式温水器。A hot water storage tank, heating means for supplying and heating the water at the lower part of the hot water tank to the upper part and heating it from the upper part of the hot water tank, and a hot water tank disposed at the upper part of the hot water tank to circulate the bath water when reheating the bath. A bath heat transfer passage that heats up by exchanging heat with the high-temperature water at the top, a feed water flow rate detecting means provided in the middle of the water supply path, and a tapping water flow rate detecting means provided in the middle of the hot water path, A hot water storage type water heater provided with an abnormality notifying means such as a lamp lighting or an alarm sound for notifying an abnormality as an abnormality when the detected feed water flow rate is larger than the hot water flow rate detected by the hot water flow rate detecting means.

給水経路途中に給水経路を遮断する給水遮断手段を設け、給水流量検出手段で検出した給水流量が出湯流量検出手段で検出した出湯流量より多い場合、前記給水遮断手段を作動させてなる請求項１項記載の貯湯式温水器。2. A water supply blocking means for blocking the water supply path is provided in the middle of the water supply path, and the water supply blocking means is activated when the supply water flow rate detected by the supply water flow rate detection means is greater than the hot water flow rate detected by the hot water flow rate detection means. The hot water storage water heater described in the item.

風呂伝熱通路の流れを遮断する風呂伝熱通路遮断手段を配設し、給水流量検出手段で検出した給水流量が出湯流量検出手段で検出した出湯流量より多い場合、風呂伝熱通路遮断手段を作動させてなる請求項１または２記載の貯湯式温水器。When the bath heat transfer passage blocking means for blocking the flow of the bath heat transfer passage is provided and the feed water flow rate detected by the feed water flow rate detection means is greater than the tapping flow rate detected by the tapping water flow rate detection means, The hot water storage water heater according to claim 1 or 2, wherein the hot water heater is operated.