JP2004011978A

JP2004011978A - Electric water heater

Info

Publication number: JP2004011978A
Application number: JP2002163946A
Authority: JP
Inventors: Ichiro Nasu; 奈須　一郎
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2002-06-05
Filing date: 2002-06-05
Publication date: 2004-01-15
Anticipated expiration: 2022-06-05
Also published as: JP3960130B2

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a case incapable of reheating water due to insufficient heat capacity in an electric water heater reheating by circulating hot water in a bathtub to a heat exchanger provided in a tank of the electric water heater. <P>SOLUTION: This electric water heater is provided with a boiling heater 2 in the upper part of the tank 1 and a reheat exchanger 3 in its upper part, and when boiling the hot water in the tank 1, actuates a boiling circulation pump 7 to boil the hot water from the top of the tank in a layered state. Therefore, even if this electric water heater has the insufficient hot water in the tank 1 when reheating a bath by the reheat heat exchanger 3, it can quickly boil necessary high-temperature hot water and secure the arbitrary amount of the water so as to eliminate cases incapable of reheating due to the insufficient heat capacity and unnecessarily using an expensive daytime electric power. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明はタンク内の水を深夜電力を利用して沸き上げる電気温水器、特に風呂浴槽のお湯を追いだきする機能を有した追いだき機能付き電気温水器に関するものである。
【０００２】
【従来の技術】
従来のこの種の電気温水器は特開平５−２６４０９９号公報に記載されているように、電気ヒータを風呂循環路に設け、浴槽の追いだきを行うのが一般的であった。
【０００３】
また近年、特開２００２−４８４１４公報に記載されているように、安価な深夜電力で沸かしたお湯の熱量を有効に使って風呂の保温、追いだきを行うことを提案されている。
【０００４】
この電気温水器は、タンク内に熱交換器を設け、循環ポンプによって浴槽のお湯をこの熱交換器を介して循環させるように構成されている。
【０００５】
さらにタンクの胴部には温度センサーを配置するとともに、タンク内部の上、下部にはそれぞれヒータを設けた構成になっている。
【０００６】
そして上記循環ポンプを介して熱交換器に浴槽のお湯を循環させ、タンク内の高温のお湯で浴槽の追いだき、保温を行うようになっていた。
【０００７】
また温度センサーでタンク内の湯温低下を検出したら必要に応じて上部ヒータおよびまたは下部ヒータに通電して追加的な加熱を行うようになっていた。
【０００８】
【発明が解決しようとする課題】
しかしながら上記従来の電気温水器では、追いだき時タンク内のお湯が足りなくなったときに追加的に加熱する場合、上部ヒータおよびまたは下部ヒータに通電して追加加熱を行うので、上部ヒータのみ通電した場合は、この上部ヒータの上の部分しか加熱できず事前に確保できる熱量が少なく、急に連続して追いだきが必要になった場合などに熱量不足になるという課題があった。
【０００９】
また上部ヒータおよびまたは下部ヒータを同時に通電して追加加熱を行うと、タンク全量を沸き上げることになり、一般的に電気料金の高価な昼間時間帯に無駄な電力を使ってしまうという課題があった。
【００１０】
本発明は前記従来の課題を解決するもので、追いだき時に熱量不足が発生した場合により効率的に追加加熱をおこないう電気温水器をを提供することを目的とする。
【００１１】
【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、下部に給水口、上部に出湯口をそれぞれ有し、沸き上げヒーターを内部上方に装備した貯湯用のタンクと、このタンク下部とと上部を連絡し、沸き上げ循環ポンプを介してタンク下部の水をタンク上部に循環させるタンク循環路と、沸き上げヒーターの上部のタンク内に設けた追いだき熱交換器と、この追いだき熱交換器および風呂循環ポンプが途中に接続され、浴槽のお湯を循環させる風呂循環路と、追いだき熱交換器に至る風呂循環路の１次側の湯温を検出する風呂温度センサーと、前記沸き上げヒーターより上部の前記タンク内の湯温を検出する沸き上げ温度センサーと、前記追いだき熱交換器より下部の前記タンク内の湯温を検出する追いだき温度センサーとを具備し、前記沸き上げヒーターへの通電を制御して沸き上げヒーター上部のタンク内の水を所定沸き上げ温度まで沸き上げるとともに、沸き上げ循環ポンプでタンク下部の水をタンク上部に供給して沸き上げ温度センサーで検出したタンク上部の温度が所定沸き上げ温度を保つように沸き上げ循環ポンプを制御してタンク内の水を積層に上部から沸き上げ、前記追いだき温度センサーで検出した湯温が追いだき判定温度以上のとき前記風呂循環ポンプを駆動して前記風呂温度センサーで検出した湯温が所定温度になるまで沸き上げようにしたものである。
【００１２】
したがって、沸き上げ制御手段で積層にタンク上部から必要な量だけ高温のお湯をフレキシブルに確保できるので、追いだき時に熱量不足になるとき条件によって最適な量だけ事前に追加沸き上げをすることができるので、不必要に高コストの昼間電力を使用することがなく、より効率的な電気温水器を提供することができる。
【００１３】
【発明の実施の形態】
本発明の電気温水器は、下部に給水口、上部に出湯口をそれぞれ有し、沸き上げヒーターを内部上方に装備した貯湯用のタンクと、このタンク下部とと上部を連絡し、沸き上げ循環ポンプを介してタンク下部の水をタンク上部に循環させるタンク循環路と、沸き上げヒーターの上部のタンク内に設けた追いだき熱交換器と、この追いだき熱交換器および風呂循環ポンプが途中に接続され、浴槽のお湯を循環させる風呂循環路と、追いだき熱交換器に至る風呂循環路の１次側の湯温を検出する風呂温度センサーと、前記沸き上げヒーターより上部の前記タンク内の湯温を検出する沸き上げ温度センサーと、前記追いだき熱交換器より下部の前記タンク内の湯温を検出する追いだき温度センサーとを具備し、前記沸き上げヒーターへの通電を制御して沸き上げヒーター上部のタンク内の水を所定沸き上げ温度まで沸き上げるとともに、沸き上げ循環ポンプでタンク下部の水をタンク上部に供給して沸き上げ温度センサーで検出したタンク上部の温度が所定沸き上げ温度を保つように沸き上げ循環ポンプを制御してタンク内の水を積層に上部から沸き上げ、前記追いだき温度センサーで検出した湯温が追いだき判定温度以上のとき前記風呂循環ポンプを駆動して前記風呂温度センサーで検出した湯温が所定温度になるまで沸き上げようにしたものである。
【００１４】
そのため、使用している浴槽の容量、季節変動による追いだきに必要な熱量の変動、給湯使用湯量の変化等に柔軟に対応することができる。
【００１５】
さらに、１つの沸き上げヒーターで全量沸き上げ、追加沸き上げのすべてに対応できる。
【００１６】
追いだき温度センサーを沸き上げヒーターと追いだき熱交換器の間のタンク内の湯温を検出する位置に設置し、沸き上げ温度センサーを兼用させるようにした。
【００１７】
２つの温度センサーを兼用しているので、構成をよりシンプルにできるとともに、コストダウンも図ることができる。
【００１８】
追いだき判定温度は給湯可能な５０℃以上に設定した。こうすることによって、沸き上げ温度センサーで検出した湯温が追いだき判定温度以下になったら追いだきを停止するので、低温になったタンクのお湯で無理に追いだきをせず、また湯側全開でも一定量の水がリークするワックスサーモ式の混合水栓でも４０℃以上のお湯が給湯できる状態で追いだきを停止するところから、追いだき後のタンク内のお湯も有効に使用することができる。
【００１９】
タンク内の残湯量と残湯温度を検出する残湯検出手段を備え、契約電力制度に従い深夜時間帯に沸き上げ手段を介してタンク内のお湯を全量沸き上げした後から次の全量沸き上げ開始までの間、残湯量と残湯温度から換算した追いだき寄与熱量が所定の湯切れ判定値を下回ったら、沸き上げ手段を介して所定量の追加沸き上げを行う湯切れ沸き上げ制御手段を設けた。
【００２０】
したがって、湯切れ沸き上げ制御手段が追いだきに必要な熱量をモニターし、追いだき時に熱量不足になる可能性がある場合に事前に必要な量、沸き上げ手段を介して積層追加沸き上げを行うので、追いだき時に熱量不足になる可能性をより少なくすることができる。
【００２１】
浴槽にお湯が張られていることを検出する湯張り完了検出手段を設け、湯切れ沸き上げ制御手段は湯張り中および湯張り完了の前後で湯切れ判定値と追加沸き上げ量を切り替えるようにし、湯張り中と湯張り完了後の湯切れ判定値と追加沸き上げ量の設定を湯張り完了前より少なく設定した。
【００２２】
こうすれば、全量追いだきを想定して設定していた湯切れ判定値を、湯張り中と湯張り完了の後は湯切れ沸き上げ制御手段が保温に必要な少ない値に切り替えるので無駄にタンク内のお湯を追加加熱することがない。
【００２３】
風呂循環路に循環水の有無を検出する通水検出器と、風呂温度設定手段を設け、湯張り完了検出手段は風呂循環ポンプを駆動しているときに通水検出器が循環水有りを検出し、さらに風呂温度センサーで検出した浴槽湯温が風呂温度設定手段に設定された温度以上のときに湯張り完了とした。
【００２４】
そのため、湯張り完了検出手段は通常風呂湯張りや風呂追いだきに使用する通水検出器と風呂温度センサーを使って風呂湯張りシーケンスや風呂追いだきシーケンスのなかで風呂湯張り完了を検出するので、新たな検出器や検出処理を設けることなく簡単に構成することができる。
【００２５】
追いだき温度センサーで検出した湯温が追いだき判定温度以下になった場合、追いだき手段が風呂追いだきをできなくなったことを報知する追いだき不可報知手段を設けた。
【００２６】
この追いだき不可報知手段により使用者に追いだきができないことを報知するので、機器の故障と誤解することなく、また差し湯等のほかの手段を使用してお風呂に入れるようにすることができる。
【００２７】
湯切れ沸き上げ制御手段が湯切れ沸き上げを行うかどうかを選択する湯切れ沸き上げ選択手段を設け、湯切れ沸き上げが非選択時に追いだき温度センサーで検出した湯温が追いだき判定温度以下になった場合、追いだき手段が風呂追いだきをできなくなったことを報知する追いだき不可報知手段を設けた。
【００２８】
上記によれば、湯切れ沸き上げ選択手段により湯切れ沸き上げをしないようにできるので、夏場シャワーしか使用しない場合、使用しない追いだきに備えて無駄な追加沸き上げをしないようにできる。
【００２９】
また、この追いだき不可報知手段により使用者は追いだきができないのを機器の故障と誤解することなく、差し湯等のほかの手段を使用してお風呂に入れるようにすることができる。
【００３０】
追いだき手段の時系列的動作状態を検出して自動的に湯切れ沸き上げ制御手段が湯切れ沸き上げを行うかどうか等の制御パターンを切り替える湯切れ沸き上げ学習手段を設けた。
【００３１】
これによって、湯切れ沸き上げ学習手段が自動的に湯切れ沸き上げ制御手段の動作をＯＮ／ＯＦＦするので、追いだきの使用が季節に応じて変化した場合、使用者の生活パターンにより変化した場合、変化に合わせて湯切れ沸き上げを行うかどうかを切り替えるので使用しない追いだきに備えて無駄な追加沸き上げをしないようにできる。
【００３２】
タンク内の残湯量と残湯温度を検出する残湯検出手段を備え、追いだきを開始するとき風呂温度センサーで検出した浴槽温度に対応した能力不足判定値より残湯検出手段で検出した残湯量と残湯温度から換算した追いだき寄与熱量が少ない場合、能力不足を報知する追いだき能力不足報知手段を設けた。
【００３３】
このように追いだき能力不足報知手段が追いだき開始時に能力不足を判断して報知するので、前日の残り湯を沸き上げる際に中途半端に沸き上げてしまい、そのままでは温度が低すぎて入浴できず、差し湯しても溢れてお湯を無駄にしてしまうという状況を回避できる。
【００３４】
タンク上部の出湯口に接続された出湯配管と、出湯配管と風呂循環呂を接続する風呂給湯配管と、風呂給湯配管に介在して浴槽への給湯を開閉する風呂給湯弁を備え、追いだき温度センサーで検出した湯温が追いだき判定温度以下になって風呂追いだきをできなくなった場合に追いだき手段は風呂給湯弁を開にしてタンクのお湯を給湯するようにした。
【００３５】
このように追いだき手段は追いだきのための熱量不足の時、自動的に差し湯に切り替えるので操作部に追いだきスイッチと差し湯スイッチを別々に設ける必要がなく操作部をシンプルにすることができる。
【００３６】
【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。
【００３７】
（実施例１）
図１において、貯湯用のタンク１の上部には沸き上げヒーター２と追いだき熱交換器３が内設され、また沸き上げ温度センサー４が取り付けられている。さらに熱交換器３より下方には追いだき温度センサー５が配置されている。
【００３８】
タンク循環路６でタンク１の上、下部は連通しており、そのタンク循環路６に接続した沸き上げ循環ポンプ７を駆動することでタンク１の下部の水をタンク１上部に循環させる。
【００３９】
風呂循環路８はその途中に接続した風呂循環ポンプ９を駆動することで浴槽１０のお湯を追いだき熱交換器３を介して循環させるもので、風呂循環ポンプ９はその１次側、すなわち、浴槽１０から熱交換器３へ至る循環往路に位置するものである。
【００４０】
３つの残湯温度センサー１１は、残湯検出手段を構成するもので、タンク１の側面に縦方向に配置してあって、各位置の温度を測定することで残湯量を検出するようになっている。
【００４１】
タンク１の上部から導出された出湯配管１２には混合弁１３を介して給水配管１４が接続されている。またこの混合弁１３より下流側の出湯配管１２内のお湯の温度は出湯温度センサー１５で検知されるようにしてある。そしてこの出湯温度センサー１５の検知結果にもとづいて混合弁１３でタンク１からの高温のお湯と給水配管１４からの水を混合し、出湯配管１５に所定の温度のお湯を供給するようになっている。
【００４２】
なお、給水配管１４は途中から分岐されてタンク１の下部へ接続されている。
【００４３】
風呂循環路８において、その１次側で風呂循環ポンプ７の下流側には風呂温度センサー１６が、２次側、すなわち、追いだき熱交換器３から浴槽１０へ至る復路には通水検出器１７がそれぞれ設けてある。通水検出器１７は風呂循環ポンプ９を駆動した際の通水を検出して浴槽水ありと判断し、風呂温度センサー１６はこの時の温度を浴槽湯温として検出するようになっている。
【００４４】
１８は風呂循環路８の一次側に設けた水位センサー、１９は出湯配管１２より分岐し、風呂循環路８の２次側に接続された配管を開閉する風呂給湯弁で、一連のシーケンスで開閉され、水位センサー１８で検出した水位をもとに浴槽に所定水位まで風呂湯張りを行う。２０は給湯通水検出器でカランなどで出湯されたことを検出する。
【００４５】
なお、上記した各種温度センサーは、例えばサーミスターなどで構成されている。
【００４６】
図２の台所リモコン部は、台所に設置して温水器の各種設定を行うとともに、温水器の状態を表示するもので、給湯温度設定スイッチ２１、給湯温度設定表示部２２を有する。
【００４７】
給湯通水検出器２０で給湯が開始されたことを検出して、出湯温度センサー１５で検出した温度が給湯温度設定スイッチ２１で設定された給湯設定温度になるよう混合弁１３を制御するようになっている。
【００４８】
２３は時計時刻設定スイッチ、２４は時計時刻表示で、この時計時刻に従って電力会社と契約した電力制度に従って、安価な深夜電力を使用してタンク１内のお湯を沸き上げる。
【００４９】
２５はふろ自動スイッチ、２６はふろ自動表示ランプである。ふろ自動スイッチ２５を操作すると、ふろ自動運転をＯＮ／ＯＦＦすることができ、ふろ自動運転ＯＮのときふろ自動表示ランプ２６が点灯する。
【００５０】
ふろ自動運転は後述の浴室リモコンで設定された風呂設定温度と風呂設定水位に従って自動的に浴槽に湯張りを行い、その後風呂設定温度と風呂設定水位を保つように保温運転、足し湯運転を自動的に行う。
【００５１】
２７は残湯表示部で、４段階の残湯レベルを表示するようになっている。残湯レベルは追いだき温度センサー５と３つの残湯温度センサー１１で各センサー毎に６０℃以上を検出したとき残湯あり、５５℃以下を検出した時残湯なしとし、残湯有りを検出している温度センサーの数を残湯レベルとして対応した表示を行うようになっている。
【００５２】
２８はおまかせスイッチ、２９は湯切れ沸き上げ選択手段である残湯設定スイッチ、３０は残湯設定表示部、３１はおまかせ表示部である。残湯設定表示部３０は湯切れ沸き上げ制御手段が確保する残湯量を示している。
【００５３】
残湯設定には「多め」「標準」「少なめ」「ＯＦＦ」があり、「多め」は浴槽全量沸き上げと風呂保温可能な熱量を確保、「標準」は風呂保温が可能な熱量を確保、「少なめ」給湯可能な湯量を確保、「ＯＦＦ」湯切れ沸き上げを停止する設定である。
【００５４】
おまかせスイッチ２８でおまかせＯＮになっているときはおまかせ表示部３１が点灯し、湯切れ沸き上げ学習手段によって過去の追いだき運転履歴、ふろ自動運転で起動される一連の湯張りシーケンスの中で湯張り完了検出手段が検出する湯張り完了等によって残湯設定が自動的に更新される。
【００５５】
残湯設定スイッチ２９を操作して残湯設定を手動で変更することもできる。また、残湯設定スイッチ２９はおまかせＯＮ／ＯＦＦに関係なく受け付け、夏場シャワーのみ使っていておまかせ機能により残湯設定がＯＦＦになっている場合でも、その日に風呂を沸かしたい場合はおまかせＯＮの状態で残湯設定を「多め」にし、風呂沸き上げに必要な熱量を確保することができる。
【００５６】
３２は追いだき不可報知手段である追いだき不可表示部である。追いだき温度センサー５で６５℃以下を検出したら追いだき不可表示部３２を点灯して追いだき運転が作動しないことを報知する。
【００５７】
湯切れ沸き上げ制御手段が沸き上げ手段を介して残湯設定に対応した残湯量を確保するので残湯設定が「ＯＦＦ」になっていなければ通常は点灯することがない。
【００５８】
３３は保温表示部で、ふろ自動スイッチ２５でふろ自動運転がＯＮしているとき一連のシーケンスで浴槽への湯張りが完了した場合に点灯する。
【００５９】
図３の浴室リモコン部は浴室に設置して温水器のおもに風呂機能の各種設定を行うとともに、風呂機能の状態を表示する。
【００６０】
３４は給湯温度設定スイッチ、３５は給湯温度設定表示部である。台所リモコン部と同様、カランなどに給湯する給湯温度を設定することができる。
【００６１】
３６は風呂湯量設定スイッチ、３７は風呂水位表示部、３８は風呂温度設定スイッチ、３９は風呂温度設定表示部である。風呂湯量設定スイッチ３６で浴槽への湯張り湯量を浴槽水位レベルとして設定できる。設定された風呂水位表示部３７に数次とバー表示で表示される。また風呂温度設定スイッチ３８によって浴槽への湯張り温度を設定することができる。設定された風呂設定温度は風呂温度設定表示部３９に表示される。
【００６２】
４０はふろ自動スイッチ、４１はふろ自動表示ランプ、４２は保温表示部である。台所リモコンと同様にふろ自動スイッチ４０でふろ自動運転をＯＮ／ＯＦＦできる。ふろ自動表示ランプ４１はふろ自動運転がＯＮの時点灯する。また、保温表示部４２はふろ自動運転ＯＮで一連のシーケンスで浴槽への湯張りが完了した時に点灯する。
【００６３】
４３は追いだきスイッチ、４４は追いだき表示ランプ、４５は追いだき不可報知手段である追いだき不可表示部である。追いだきスイッチ４３によって追いだき運転をＯＮ／ＯＦＦすることができ、追いだき運転ＯＮ時は追いだき表示ランプ４４が点灯する。
【００６４】
追いだき運転はタンク１内の湯温が追いだき可能な６５℃以上あるときに風呂循環ポンプ９を駆動して浴槽内のお湯を追いだき熱交換器３へ循環させてタンク１内の高温のお湯で５分間沸き上げる。
【００６５】
追いだき不可表示部４５は台所リモコン同様、タンク内の湯温が６５℃以下に低下して追いだきができなくなった時に点灯する。
【００６６】
上記追いだき不可表示部４５が点灯している時、追いだきスイッチ４３を押すと混合弁１２を湯側全開にし、風呂給湯弁１９を開いてタンク１内のお湯をそのまま３分間浴槽に給湯する高温差し湯を行う。
【００６７】
また３つの残湯温度センサー１１で検出したそれぞれの温度をもとに算出した追いだきに寄与できる熱量が所定の判定値に達しない場合は、追いだき表示ランプ４４を点滅させて追いだき能力不足報知手段である能力不足表示を行う。
【００６８】
ふろ自動運転で前日の残り湯を沸き上げる場合等も能力不足を検出したら追いだき表示ランプを点滅させて上記能力不足表示をおこなう。
【００６９】
ソフトで実現されている沸き上げ手段は電力契約に従い、深夜時間帯にタンク１内のお湯を全量９０℃まで沸き上げる。
【００７０】
沸き上げ手段の動作を図４を用いて説明する。タンク内のお湯を沸き上げるときは、［Ｓ０００］で沸き上げヒーター２に通電し沸き上げヒーター２上部のお湯を加熱する。このとき沸き上げヒーター２より上部のお湯は対流のため均等に沸き上がり、沸き上げヒーター２の直下部で比重差により湯と水の分離層が形成される。
【００７１】
［Ｓ００１］で沸き上げ温度センサー４が９１℃を検出したら、［Ｓ００２］で沸き上げ循環ポンプ７を駆動する。タンク１の下部に低温のお湯または水がある場合はタンク１上部が冷やされる。この時、タンク循環路６の出口の形状は水が拡散するような形状になっていてタンク上部の高温のお湯は全体的に冷やされる。
【００７２】
［Ｓ００３］で沸き上げ温度センサー４が８９℃未満を検出したら［Ｓ０００］に戻って沸き上げ循環ポンプ７を停止する。タンク１上部のお湯は比重差から積層をなして下部の水と分離した状態を保ちながら沸き上がり循環ポンプ７によって供給された水の分だけ量を増していく。
【００７３】
そして沸き上げ循環ポンプ７を駆動しても温度が低下せず、［Ｓ００４］で沸き上げ温度センサー５が９４℃を検出したら、タンク下部まで沸きあがったとして［Ｓ００５］で沸き上げヒーター２、沸き上げ循環ポンプ７への通電を停止して全量沸き上げを終了する。
【００７４】
次にソフトで実現される追いだき手段の動作を図５を用いて説明する。まず［Ｓ１００］でタンク１内の湯温が追いだき可能な温度かを確認する。６５℃未満の場合は追いだき運転をせず、［Ｓ１０１］で風呂循環ポンプ９を停止して追いだきを終了する。
【００７５】
［Ｓ１００］で追いだき温度センサー５が６５℃以上を検出したら追いだきが可能として、［Ｓ１０２］で風呂循環ポンプ９をＯＮして追いだき熱交換器３に浴槽のお湯を循環させ加熱する。
【００７６】
［Ｓ１０３］の通水検出器１７による通水チェック、［Ｓ１０４］、［Ｓ１０５］による追いだき運転かふろ自動運転の保温運転かの判定をして、追いだき運転の場合は［Ｓ１０６］で５分間追いだき時間をチェックしながら、［Ｓ１００］〜［Ｓ１０６］の処理をループする。
【００７７】
追いだき中にタンク１内の湯温が低下して［Ｓ１００］で６５未満を検出したらその時点で追いだきを中断する。
【００７８】
［Ｓ１０６］で５分間追いだきを継続を検出したら、［Ｓ１０７］で風呂温度センサー１６により浴槽湯温が風呂設定温度以上になっていることを確認し、［Ｓ１０１］で風呂循環ポンプ９をＯＦＦして追いだきを修了する。
【００７９】
本来、入浴中に少しだけ温度を上げるための追いだき運転時も［Ｓ１０７］の判定を通すことで前日の残り湯を沸き上げる時も使用することができる。
【００８０】
また［Ｓ１０４］でふろ自動がＯＮしていたら、［Ｓ１０７］の風呂温度センサー１６による浴槽湯温のチェックのみおこない、浴槽湯温が風呂設定温度になったら［Ｓ１０１］で風呂循環ポンプ９をＯＦＦして追いだきを修了する。
【００８１】
［Ｓ１０７］で浴槽湯温が風呂設定温度に達したことで［Ｓ１０８］で湯張り完了を確定し、湯張り完了検出手段を実現している。この湯張り完了の確定は１日の基準となっている温水器の全量沸き上げスタートのタイミングで解除される。
【００８２】
［Ｓ１０５］で追いだき運転がＯＦＦしている場合は、ふろ自動運転、追いだき運転がＯＦＦされたとして追いだきを中断する。
【００８３】
次に湯切れ沸き上げ制御手段について説明する。湯切れ沸き上げ制御は図２の残湯設定スイッチ２９で設定された残湯設定に対応して４つのパターンで制御される。
【００８４】
「多め」設定になっているとき、湯張り完了検出手段により湯張り完了を確定するまでは浴槽を全量追いだきで沸き上げることを想定して追いだきに必要な熱量を確保し、ふろ自動ＯＮ中および湯張り完了を確定後は入浴時に追加で追いだきすることを想定して追いだきに必要な熱量を確保する。「標準」設定になっているときは入浴時に追加で追いだきすることのみを想定して追いだきに必要な熱量を確保する。「少なめ」設定になっているときは追いだきは行わず、給湯で湯切れを起こさないことを想定して必要な湯量を確保する。「ＯＦＦ」設定になっているときは湯切れ沸き上げ制御は行わない。
【００８５】
具体的には追いだき温度センサー５と３つの残湯温度センサー１１をそれぞれタンク１の上部から７０Ｌ、１２０Ｌ、１７０Ｌ、２２０Ｌの位置になるよう設置する。最上部の追いだき温度センサー５の位置は追いだきに寄与する実質湯量が５０Ｌになるよう追いだき熱交換器３上部の無効湯量２０Ｌを見込んで７０Ｌの位置につけられている。
【００８６】
これら追いだき温度センサー５と３つの残湯温度センサー１１で検出した温度を使って追いだき寄与熱量を算出する。例えば、追いだき温度センサー５が８５℃、残湯温度センサー１１が上から８５℃、７０℃、２０℃を検出していたら、６５℃以上の部分が追いだきに寄与できるとして、最上部より
５０Ｌの追いだき寄与熱量Ｑ１＝（８５−６５）×５０×４．２ｋＪ
５０Ｌの追いだき寄与熱量Ｑ２＝（８５−６５）×５０×４．２ｋＪ
５０Ｌの追いだき寄与熱量Ｑ３＝（７０−６５）×５０×４．２ｋＪ
５０Ｌの追いだき寄与熱量Ｑ４＝０ｋＪ
となり、９４５０ｋＪとなる。
【００８７】
「多め」設定の時は湯張り完了確定までは全量追いだきで沸き上げるのを想定するので、必要な熱量の設定は２００Ｌ（想定浴槽容量）、１５℃から４０℃までの２５Ｋ沸き上げる熱量として２１０００ｋＪとなる。ただし、全量沸き上げるのに３０分を見込んで、最悪同時に５ｋＷの沸き上げヒーター２を同時にＯＮするとして沸き上げヒーター２の分９０００ｋＪを除いた１２０００ｋＪを確保するようにする。
【００８８】
上記の残湯状態では追いだき寄与熱量は９４５０ｋＪなので１２０００ｋＪに回復するまで沸き上げ手段を起動して沸き上げを行い、１２０００ｋＪになった時点で沸き上げ手段を停止させて湯切れ沸き上げを行う。実際には１２０００ｋＪを切ったら沸き上げを開始し、１２０００ｋＪになったら沸き上げを停止するという動作になりＯＮ／ＯＦＦ頻度が多くなるので、一旦湯切れ沸き上げを開始したら最低３０分継続するようにする。
【００８９】
「多め」設定のふろ自動ＯＮおよび湯張り完了確定後、または「標準」設定の時は入浴時の追加追いだきを想定するので、２００Ｌを５Ｋ沸き上げる熱量を確保する。つまり４２００ｋＪを確保するように上記湯切れ沸き上げを行う。
【００９０】
「少なめ」設定の時は給湯で湯切れを起こさないことを想定するので残湯温度センサー１１のうち最上部の残湯温度センサーが５５℃以下になって残湯なしを検出したら湯切れ沸き上げを開始する。この時の湯切れ沸き上げは同残湯温度センサーが６０℃になって残湯ありを検出した時点で停止するが、この場合も最低動作時間は３０分とする。
【００９１】
「ＯＦＦ」設定になっているときは湯切れ沸き上げは行わない。
【００９２】
つぎに湯切れ沸き上げ学習手段について説明する。湯切れ沸き上げ学習手段はおまかせスイッチ２８でおまかせＯＮになっているとき、５分を超える追いだきの有無と５分以下の追いだきの有無を１日単位でチェックし、５分を超える追いだきが有ったら残湯設定を「多め」にし、残湯設定が「多め」で７日連続して５分を超える追いだきがなかったら残湯設定を「標準」に切り換える。
【００９３】
また残湯設定が「少なめ」で５分以下の追いだきがあったら残湯設定を「標準」にし、残湯設定が「標準で」で７日連続して５分以下の追いだきが無かったら残湯設定を「少なめ」に切り換える。
【００９４】
つぎに追いだき能力不足報知手段について説明する。追いだき能力不足報知手段は追いだき開始時に通水検出器１７で浴槽水有りを検出した状態でふろ温度センサー１６で検出した浴槽温度が風呂温度設定スイッチ３８で設定した風呂設定温度より５Ｋ以上低い場合に、浴槽容量を２００Ｌとして浴槽湯温と風呂設定温度との差と２００Ｌから沸き上げに必要な熱量を算出し、湯切れ沸き上げ制御手段で算出された追いだき寄与熱量と比較し、追いだき寄与熱量が不足している場合に追いだき表示ランプを点滅させて報知するとともに、沸き上げ手段を介して追いだきと同時に追加沸き上げをおこなう。
【００９５】
次に動作、作用について説明する。
【００９６】
まずタンク１上部に沸き上げヒーター２を設け、その上部に追いだき熱交換器３を設け、タンク１内のお湯を沸き上げる際は沸き上げ循環ポンプ７を駆動しながらタンク１上部から積層状態でお湯を沸き上げる構成を採っているので、追いだき熱交換器３で風呂追いだきをする場合、タンク内のお湯が不足していても必要な高温のお湯を迅速沸かすことができ、その量も自由に確保することができるので熱量不足で追いだきできなかったり、不必要に高価な昼間電力を使うことがない。
【００９７】
また、追いだき手段はタンク１内のお湯が給湯可能な５０℃以上の条件でのみ追いだきを行うので、タンク１内に残ったお湯も無駄なく使用できる。
【００９８】
深夜電力を使用して全量沸き上げを行った後、湯切れ沸き上げ制御手段は残湯量と残湯温度をモニターし、追いだき寄与熱量を算出して、追いだき寄与熱量が追いだきに必要な熱量を下回ったら沸き上げ手段で追加沸き上げを行い、常に必要な熱量を確保するので追いだき時に熱量不足で追いだきできないということがない。
【００９９】
また湯切れ沸き上げ制御手段は常に追いだき寄与熱量を算出して追加沸き上げを行うかどうか判断しているのでお湯の使用量に合わせて必要な時のみ追加沸き上げを行うので無駄に高価な昼間電力を使うこともない。
【０１００】
さらに湯切れ沸き上げ制御手段は湯張り完了検出手段が湯張り完了を検出するまでは浴槽全量沸き上げを想定してタンク１内の熱量を確保し、ふろ自動中および湯張り完了確定後は追加追いだきを想定した熱量の確保に切り換えるので、時系列的にもこまめに確保する熱量を変えて、より無駄を省くことができる。
【０１０１】
また、全量沸き上げを想定した熱量の確保に付いては最悪、追加沸き上げを行いながらの追いだきを想定しているので事前に確保する熱量をさらに少なくすることができる。
【０１０２】
湯切れ沸き上げ制御手段では浴槽温度として仮の１５℃を使って必要な熱量を確保する方式をとっているので、浴槽湯温検出のための循環によって発生する配管放熱によるロスを低減することができ、追いだき開始時に発生する仮の浴槽湯温との誤差による過不足は、追いだき時に行う追加沸き上げで無駄なくカバーすることができる。
【０１０３】
湯張り完了検出手段は図５に示すように追いだき処理の中で同時におこなえるので、特別に新たな処理を設ける必要が無く簡単に実現できる。
【０１０４】
追いだき温度センサー５でタンク１内湯温が追いだき判定温度を下回ったら、台所リモコン部の追いだき不可表示部３２、浴室リモコン部の追いだき不可表示部４５が点灯するので追いだきができないことを使用者がすぐに理解し、給湯を使って入浴する等の適切な対応をすることができる。
【０１０５】
台所リモコン部の残湯設定スイッチ２９で残湯設定を「ＯＦＦ」にすることで湯切れ沸き上げ制御手段による追加沸き上げを行わないようにできるので、使用者が湯切れより経済性を優先したい場合にも対応できる。
【０１０６】
また、その際にも追いだき温度センサー５でタンク１内湯温が追いだき判定温度を下回ったら、台所リモコン部の追いだき不可表示部３２、浴室リモコン部の追いだき不可表示部４５が点灯するので追いだきができないことを使用者がすぐに理解し、給湯を使って入浴する等の適切な対応をすることができるのでより効果的である。
【０１０７】
台所リモコン部のおまかせスイッチ２８によりおまかせＯＮにすると、追いだきの時系列的な使用状態をもとに残湯設定を自動的に変化させるので、シャワーなどで入浴しない使用者や、季節によって夏場はシャワーのみの使用者にたいして無駄に追いだきのための熱量を確保することを防止することができる。
【０１０８】
また、この設定変更は自動的に行われるので使用者を煩わせることがなく操作性を向上させることができる。
【０１０９】
さらに、おまかせＯＮでも残湯設定スイッチ２９によって残湯設定を一時的に変更することができるのでいつもはシャワーで済ませている使用者も簡単な操作で突発的な使用変化に対応できる。
【０１１０】
追いだき開始時には浴槽湯温が検出できた段階でタンク１内の追いだき寄与熱量が不足しているかどうかを判断して不足の場合は報知するので、使用者は早い段階で追いだきをやめて浴槽の残湯を抜き、湯張りによってお風呂を沸かす等の対応ができ、中途半端に沸かした後お湯を抜いて湯張りするという無駄を省くことができる。
【０１１１】
浴室リモコン部の追いだきスイッチ４３は、追いだき不可表示部４５が出ている時はタンク１内の６５℃のお湯を直接浴槽へ高温差し湯するようになっているので、追いだきが使用できなくなってもスイッチを新たに設けることなく高温差し湯機能を実現できる。このことでタンク１内の残湯をより有効に使用することができる。この機能は残湯設定を「ＯＦＦ」にして使用する使用者にとっては非常に有効である。
【０１１２】
（実施例２）
図６は本発明の実施例２の電気温水器本体の構成を示す本体構成図である。
【０１１３】
本実施例２において、実施例１と異なる点は沸き上げ温度センサーを廃止して、追いだき温度センサー４６に沸き上げ温度センサーの機能を兼用させたことである。
【０１１４】
なお、実施例１と同一符号のものは同一構造を有し、説明は省略する。
【０１１５】
次に動作、作用を説明すると、まず沸き上げヒーター２に通電してタンク１内のお湯を沸きあげる際、沸き上げヒーター２上部のお湯は対流により均等に上昇していく。また、沸き上げ循環ポンプ７によりタンク１下部の水を混ぜる場合も比重の重い水が最上部から拡散するように供給されるので均等に冷やされる。従って、沸きあげ温度センサーは沸き上げヒーター２より上にあればよい。
【０１１６】
また、追いだき時、追いだき熱交換器３に熱を奪われ冷えたお湯は下に下降し、熱いお湯と混ざりながら対流する。したがって、追いだき時、追いだき熱交換器３下部のお湯は均等に温度低下する。
【０１１７】
つまり追いだきに寄与する湯温を検出する追いだき温度センサー４６は追いだき熱交換器３より下にあればいいことになる。
【０１１８】
その結果、沸き上げヒーター２の上に追いだき熱交換器３を配置し、沸き上げ温度センサーの機能を兼用する追いだきサーミスター４６を沸き上げヒーター２と追いだき熱交換器３の間の位置に取りつけた。
【０１１９】
このことで温度センサー、温度検出回路、温度検出処理を削減し、同等の機能を得ることができる。
【０１２０】
なお、前記各実施例の湯切れ沸き上げ制御手段、追いだき能力不足報知手段において浴槽の容量を一般的な２００Ｌに固定して熱量演算を行うとしたが、この種の温水器では設置時にふろ湯張りの試運転シーケンスを作動させることが一般的で、その中で浴槽の容量や浴槽水平断面積を検出し、水位センサー１８で検出した水位データから湯量を算出するといことも行われている。
【０１２１】
つまり、浴槽容量を２００Ｌとせず、上記演算で求めた湯量を熱量演算に使用することもできるものである。
【０１２２】
【発明の効果】
以上説明したように本発明の電気温水器は、タンク上部に沸き上げヒーターを設け、その上部に追いだき熱交換器を設け、タンク内のお湯を沸き上げる際は沸き上げ循環ポンプを駆動しながらタンク上部から積層状態でお湯を沸き上げる構成を取っているので、追いだき熱交換器で風呂追いだきをする場合、タンク内のお湯が不足していても必要な高温のお湯を迅速沸かすことができ、その量も自由に確保することができるので熱量不足で追いだきできなかったり、不必要に高価な昼間電力を使うことがないという効果がある。
【図面の簡単な説明】
【図１】本発明の実施例１における電気温水器本体の構成を示す本体構成図
【図２】同電気温水器の台所リモコン外観図
【図３】同電気温水器の浴室リモコン外観図
【図４】同電気温水器の沸き上げ手段の動作を示したフローチャート
【図５】同電気温水器の追いだき手段の動作を示したフローチャート
【図６】本発明の実施例２における電気温水器本体の構成を示す本体構成図
【符号の説明】
１　タンク
２　沸き上げヒーター
３　追いだき熱交換器
４　沸き上げ温度センサー
５　追いだき温度センサー
６　タンク循環路
７　沸き上げ循環ポンプ
８　風呂循環路
９　風呂循環ポンプ
１０　浴槽
１１　残湯温度センサー（残湯検出手段）
１２　出湯配管
１６　風呂温度温度センサー
１７　通水検出器
１９　風呂給湯弁
２９　残湯設定スイッチ（湯切れ沸き上げ選択手段）
３０　残湯設定表示部
３２　追いだき不可表示部（追いだき不可報知手段）
３８　風呂温度設定スイッチ（風呂温度設定手段）
４４　追いだき表示ランプ（追いだき能力不足報知手段兼用）
４５　追いだき不可表示部（追いだき不可報知手段）
４６　追いだき温度センサー[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater for boiling water in a tank by using electric power at midnight, and more particularly to an electric water heater having a function of driving out hot water in a bathtub.
[0002]
[Prior art]
As described in JP-A-5-264099, this type of conventional electric water heater is generally provided with an electric heater in a bath circuit to flush a bathtub.
[0003]
In recent years, as described in Japanese Patent Application Laid-Open No. 2002-48414, it has been proposed to use a calorific value of hot water boiled with inexpensive late-night electric power to effectively keep and bath a bath.
[0004]
The electric water heater is provided with a heat exchanger in a tank, and circulates hot water in a bathtub through the heat exchanger by a circulation pump.
[0005]
Further, a temperature sensor is disposed on the body of the tank, and a heater is provided on each of the upper and lower parts of the tank.
[0006]
Then, the hot water in the bathtub is circulated to the heat exchanger via the circulation pump, and the hot water in the tank is used to drive the bathtub to keep the temperature.
[0007]
Further, when the temperature sensor detects a drop in the temperature of the hot water in the tank, power is supplied to the upper heater and / or the lower heater as necessary to perform additional heating.
[0008]
[Problems to be solved by the invention]
However, in the above-described conventional electric water heater, when additional heating is performed when the amount of hot water in the tank becomes insufficient at the time of flushing, the upper heater and / or the lower heater are energized to perform additional heating. In this case, only the upper part of the upper heater can be heated, and the amount of heat that can be secured in advance is small, and there is a problem that the amount of heat is insufficient when sudden and continuous chasing is required.
[0009]
Further, if additional heating is performed by energizing the upper heater and / or the lower heater simultaneously, the entire tank is boiled, and there is a problem in that wasteful power is generally used during the daytime when electricity charges are expensive. Was.
[0010]
An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an electric water heater that performs additional heating more efficiently when a shortage of heat occurs at the time of running away.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has a water supply port at a lower portion and a tap hole at an upper portion, and a hot water storage tank equipped with a boiling heater at an upper inside, and communicates the lower portion with the upper portion of the tank to form a boiler. A tank circulation path that circulates water in the lower part of the tank to the upper part of the tank via a raising circulation pump, a flush heat exchanger provided in the tank above the boiling heater, and a flush heat exchanger and a bath circulation pump. A bath circuit connected in the middle to circulate hot water in the bathtub, a bath temperature sensor for detecting the temperature of the hot water on the primary side of the bath circuit leading to the follow-up heat exchanger, and the tank above the heating heater A boiling temperature sensor for detecting the temperature of hot water in the tank, and a flushing temperature sensor for detecting the temperature of hot water in the tank below the flushing heat exchanger. The water in the tank above the heating heater is heated to a predetermined boiling temperature by controlling the electricity, and the water in the lower part of the tank is supplied to the upper tank by a boiling circulation pump, and the water in the upper part of the tank detected by the heating temperature sensor is detected. The water in the tank is heated from the top of the stack by controlling the boiling circulation pump so that the temperature is maintained at the predetermined boiling temperature, and when the hot water temperature detected by the flushing temperature sensor is equal to or higher than the flushing determination temperature, the bath is controlled. The circulating pump is driven to boil until the hot water temperature detected by the bath temperature sensor reaches a predetermined temperature.
[0012]
Therefore, the required amount of high-temperature hot water can be flexibly secured from the upper part of the tank in the lamination by the boiling control means, so that when the amount of heat is insufficient at the time of chasing, additional boiling can be performed in advance by an optimum amount depending on conditions. Therefore, a more efficient electric water heater can be provided without unnecessarily using high-cost daytime electric power.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
The electric water heater of the present invention has a water supply port at a lower portion and a tap hole at an upper portion, and a tank for storing hot water equipped with a boiling heater at an upper inside thereof. The tank circulation path that circulates the water in the lower part of the tank to the upper part of the tank via the pump, the flushing heat exchanger provided in the tank above the boiling heater, and the flushing heat exchanger and the bath circulation pump A bath circulation path connected to circulate hot water in the bathtub, a bath temperature sensor for detecting the temperature of the hot water on the primary side of the bath circulation path leading to the entraining heat exchanger, and a tank in the tank above the boiling heater. A heating temperature sensor for detecting the temperature of the hot water, and a temperature sensor for detecting the temperature of the hot water in the tank below the heat exchanger for controlling the power supply to the heating heater. The water in the tank above the heater is boiled to the predetermined boiling temperature, and the water in the lower part of the tank is supplied to the tank upper part by the boiling circulation pump. The boiling circulation pump is controlled to maintain the heating temperature, and the water in the tank is boiled from the top to the lamination, and the bath circulation pump is driven when the hot water temperature detected by the above-mentioned flushing temperature sensor is equal to or higher than the flushing determination temperature. Then, the hot water detected by the bath temperature sensor is heated to a predetermined temperature.
[0014]
Therefore, it is possible to flexibly cope with a change in the capacity of the bathtub used, a change in the amount of heat required for driving out due to seasonal changes, a change in the amount of hot water used for hot water supply, and the like.
[0015]
In addition, a single heating heater can be used to heat all and all of the additional heating.
[0016]
A flushing temperature sensor was installed at the position between the heating heater and the flushing heat exchanger to detect the temperature of the hot water in the tank, and the boiling temperature sensor was also used.
[0017]
Since the two temperature sensors are shared, the structure can be simplified and the cost can be reduced.
[0018]
The temperature for judging after running was set to 50 ° C. or higher at which hot water could be supplied. In this way, if the temperature of the hot water detected by the boiling temperature sensor falls below the temperature at which it is determined to be below the threshold, the purging is stopped. However, even with a wax thermo-type mixing faucet that leaks a certain amount of water, it stops pouring when hot water of 40 ° C or more can be supplied, so the hot water in the tank after pouring can also be used effectively. .
[0019]
Equipped with remaining hot water detection means for detecting the remaining hot water amount and remaining hot water temperature in the tank, and after the hot water in the tank has been completely heated through the boiling means at midnight according to the contract electric power system, the next full heating starts In the meantime, after the remaining hot water amount and the remaining hot water converted from the remaining hot water temperature fall below a predetermined hot-water determination value, a hot-water boiling control means for performing additional heating of a predetermined amount via the boiling means is provided. Was.
[0020]
Therefore, the hot-water boiling control means monitors the amount of heat required for flushing, and if there is a possibility that the amount of heat may be insufficient at the time of flushing, the necessary amount in advance, and additional heating of the stack via the boiling means is performed. Therefore, it is possible to further reduce the possibility that the amount of heat will be insufficient at the time of driving.
[0021]
Filling completion detecting means for detecting that hot water is filled in the bathtub is provided, and the draining and boiling control means switches between the draining determination value and the additional boiling amount during and before and after filling. In addition, the values of the hot water judging value and the additional boiling amount during and after the filling were set to be smaller than those before the filling.
[0022]
In this case, the drainage judging value, which was set assuming that all of the water has been drained, is switched to a small value necessary for keeping the temperature during the filling and after the filling is completed. No additional heating of hot water inside.
[0023]
A bath detector that detects the presence or absence of circulating water in the bath circulation path and a bath temperature setting unit are provided. The bath filling completion detector detects the presence of circulating water when the bath circulation pump is driven. The bath filling was completed when the bath water temperature detected by the bath temperature sensor was equal to or higher than the temperature set in the bath temperature setting means.
[0024]
Therefore, the bath filling completion detecting means detects the completion of the bath filling in the bath filling sequence or the bath filling sequence using a water flow detector and a bath temperature sensor which are usually used for bath filling and bath filling. , And can be simply configured without providing a new detector or detection processing.
[0025]
When the hot water temperature detected by the temperature sensor falls below the temperature for determining the temperature of the bath, a warning device is provided to notify that the bathing means cannot perform the bathing.
[0026]
This means that the user is unable to be chased by this means of not being able to be chased, so that the user can take a bath without misunderstanding that the equipment is out of order and use other means such as hot water. it can.
[0027]
The hot-water boiling control means includes hot-water boiling-up selection means for selecting whether to perform hot-water boiling, and when the hot-water boiling is not selected, the hot-water temperature detected by the hot-water temperature sensor is equal to or lower than the hot-water determination temperature. In the case of, there is provided an unfollowing notifying means for notifying that the chasing means can no longer take the bath.
[0028]
According to the above, it is possible to prevent the hot water from being boiled by the hot water boil-off selecting means. Therefore, when only the shower in summer is used, it is possible to prevent unnecessary additional heating in preparation for the unused flush.
[0029]
Further, the user can take a bath by using other means such as a hot water bath without misunderstanding that the user is unable to be chased out by the improper chasing means as a malfunction of the device.
[0030]
There is provided a draining-boiler learning means for detecting a time-series operation state of the chasing means and automatically switching a control pattern such as whether or not the drainage-boiler controlling means performs the draining and boiling.
[0031]
As a result, the running-out boiling learning means automatically turns on / off the operation of the running-out boiling control means. In addition, since it is switched according to the change whether or not the hot water is to be boiled, it is possible to prevent unnecessary additional heating in preparation for a hunting operation that is not used.
[0032]
Equipped with remaining hot water detection means for detecting the remaining hot water amount and remaining hot water temperature in the tank, and the remaining hot water amount detected by the remaining hot water detection means based on the capacity shortage determination value corresponding to the bath tub temperature detected by the bath temperature sensor when starting flushing When the amount of heat contributed to the conversion converted from the remaining hot water temperature is small, a means for notifying the shortage of the ability to notify the insufficient capacity is provided.
[0033]
In this way, the insufficiency of insufficiency informing means determines and reports the insufficiency of the ability at the start of the insufficiency, so when the remaining hot water of the previous day is boiled, it will be boiled halfway, and the temperature is too low and you can take a bath as it is Instead, it is possible to avoid a situation in which hot water overflows and wastes hot water.
[0034]
Equipped with a tap water pipe connected to the tap at the top of the tank, a hot water supply pipe connecting the hot water supply pipe and the bath circulation bath, and a hot water supply valve that opens / closes hot water supply to the bathtub through the hot water supply pipe. When the temperature of the hot water detected by the sensor becomes lower than the temperature for determining the running out of water and the bath cannot be blown out, the bathing means opens the bath hot water supply valve to supply hot water in the tank.
[0035]
In this way, the pouring means automatically switches to hot water when the amount of heat for purging is insufficient, so it is not necessary to separately provide a pouring switch and a hot water switch in the operating section, and the operating section can be simplified. it can.
[0036]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0037]
(Example 1)
In FIG. 1, a heating heater 2 and a follow-up heat exchanger 3 are provided inside a tank 1 for storing hot water, and a heating temperature sensor 4 is attached. Further, below the heat exchanger 3, a driving temperature sensor 5 is arranged.
[0038]
The upper and lower portions of the tank 1 communicate with each other in the tank circulation path 6, and the water in the lower part of the tank 1 is circulated to the upper part of the tank 1 by driving a boiling circulation pump 7 connected to the tank circulation path 6.
[0039]
The bath circulation path 8 drives the bath circulation pump 9 connected on the way to drive out the hot water in the bathtub 10 and circulate it through the heat exchanger 3, and the bath circulation pump 9 has a primary side, that is, It is located on the circulation outward path from the bathtub 10 to the heat exchanger 3.
[0040]
The three remaining hot water temperature sensors 11 constitute the remaining hot water detecting means, and are arranged vertically on the side surface of the tank 1, and detect the remaining hot water amount by measuring the temperature at each position. ing.
[0041]
A water supply pipe 14 is connected via a mixing valve 13 to a hot water supply pipe 12 led out from the upper part of the tank 1. The temperature of hot water in hot water outlet pipe 12 downstream of mixing valve 13 is detected by hot water temperature sensor 15. The hot water from the tank 1 and the water from the water supply pipe 14 are mixed by the mixing valve 13 based on the detection result of the hot water temperature sensor 15, and hot water at a predetermined temperature is supplied to the hot water pipe 15. I have.
[0042]
The water supply pipe 14 is branched from the middle and connected to the lower part of the tank 1.
[0043]
In the bath circulation path 8, a bath temperature sensor 16 is provided on the primary side downstream of the bath circulation pump 7, and a water flow detector is provided on the secondary side, that is, a return path from the follow-up heat exchanger 3 to the bathtub 10. 17 are provided. The water flow detector 17 detects water flow when the bath circulation pump 9 is driven and determines that there is bath water, and the bath temperature sensor 16 detects the temperature at this time as the bath water temperature.
[0044]
Reference numeral 18 denotes a water level sensor provided on the primary side of the bath circulation path 8, and 19 denotes a bath hot water supply valve which branches from the hot water supply pipe 12 and opens and closes a pipe connected to the secondary side of the bath circulation path 8, and opens and closes in a series of sequences. Then, based on the water level detected by the water level sensor 18, the bathtub is filled with bath water to a predetermined water level. Reference numeral 20 denotes a hot water supply / water supply detector for detecting that hot water has been supplied by a hot water or the like.
[0045]
The above-mentioned various temperature sensors are constituted by, for example, a thermistor.
[0046]
The kitchen remote controller of FIG. 2 is installed in the kitchen to perform various settings of the water heater and displays the state of the water heater, and has a hot water supply temperature setting switch 21 and a hot water supply temperature setting display unit 22.
[0047]
When the hot water supply detector 20 detects that hot water is started, the mixing valve 13 is controlled so that the temperature detected by the hot water temperature sensor 15 becomes the hot water set temperature set by the hot water temperature setting switch 21. Has become.
[0048]
Reference numeral 23 denotes a clock time setting switch, and reference numeral 24 denotes a clock time display. In accordance with the clock time, the hot water in the tank 1 is heated using inexpensive midnight power in accordance with a power system contracted with a power company.
[0049]
25 is a bath automatic switch and 26 is a bath automatic display lamp. By operating the bath automatic switch 25, the bath automatic operation can be turned ON / OFF. When the bath automatic operation is ON, the bath automatic display lamp 26 is turned on.
[0050]
Bath automatic operation automatically fills the bathtub according to the bath set temperature and bath set water level set by the bathroom remote control described later, and then automatically performs the warming operation and the hot water operation so as to maintain the bath set temperature and bath set water level Do it.
[0051]
Reference numeral 27 denotes a remaining hot water display section, which displays four levels of remaining hot water. The remaining hot water level is determined by the following temperature sensor 5 and the three remaining hot water temperature sensors 11 for each sensor when the temperature is 60 ° C. or more, and the remaining hot water is detected when the temperature is 55 ° C. or less. A display corresponding to the number of temperature sensors being used as the remaining hot water level is provided.
[0052]
Reference numeral 28 denotes an automatic switch, reference numeral 29 denotes a remaining hot water setting switch, which is a means for selecting a hot water supply, and reference numeral 30 denotes a remaining hot water setting display unit and reference numeral 31 denotes an automatic display unit. The remaining hot water setting display section 30 indicates the amount of remaining hot water secured by the hot-water boiling control means.
[0053]
The remaining hot water settings include "large", "standard", "slightly" and "OFF", "large" secures the heat that can heat the entire bathtub and keep the bath warm, and "standard" secures the heat that can keep the bath warm. The setting is such that the "small" amount of hot water that can be supplied is ensured, and the "OFF" hot water supply is stopped.
[0054]
When the automatic switch 28 is turned ON, the automatic display section 31 is turned on, and the hot water running-up learning means is used to record the hot water in the past running operation history and the hot water in a series of hot water filling sequences started by the automatic bath operation. The remaining hot water setting is automatically updated by filling completion detected by the filling completion detecting means.
[0055]
The remaining hot water setting can also be manually changed by operating the remaining hot water setting switch 29. Also, the remaining hot water setting switch 29 is accepted regardless of whether it is ON or OFF. Even if only the summer shower is used and the hot water setting is OFF by the automatic cleaning function, if you want to boil the bath on the same day, leave the ON state. With this, the remaining hot water setting is set to “large” and the amount of heat necessary for boiling the bath can be secured.
[0056]
Numeral 32 denotes an unfollowing indication unit which is a means for notifying unfollowing. When the driving temperature sensor 5 detects 65 ° C. or less, the driving-out impossible display section 32 is turned on to notify that the driving operation is not activated.
[0057]
Since the hot-water boiling control means secures the remaining hot water amount corresponding to the remaining hot water setting via the hot water heating means, it is not normally turned on unless the remaining hot water setting is "OFF".
[0058]
Reference numeral 33 denotes a heat retention display section, which is turned on when bath filling is completed in a series of sequences when bath automatic operation is ON with the bath automatic switch 25.
[0059]
The bathroom remote controller of FIG. 3 is installed in the bathroom to set various bath functions on the main body of the water heater and to display the state of the bath functions.
[0060]
34 is a hot water temperature setting switch, and 35 is a hot water temperature setting display section. As in the case of the kitchen remote control unit, a hot water supply temperature for supplying hot water to curan or the like can be set.
[0061]
36 is a bath water amount setting switch, 37 is a bath water level display section, 38 is a bath temperature setting switch, and 39 is a bath temperature setting display section. The amount of hot water supplied to the bathtub can be set as the bathtub water level by using the bath water amount setting switch 36. The set bath water level display section 37 displays a number order and a bar display. Further, the bathing temperature of the bathtub can be set by the bath temperature setting switch 38. The set bath set temperature is displayed on the bath temperature setting display section 39.
[0062]
40 is a bath automatic switch, 41 is a bath automatic display lamp, and 42 is a warming display unit. The automatic bath operation can be turned ON / OFF with the bath automatic switch 40 in the same manner as the kitchen remote controller. The bath automatic display lamp 41 is lit when the bath automatic operation is ON. In addition, the heat retention display section 42 is turned on when bath filling is completed in a series of sequences with the bath automatic operation ON.
[0063]
Reference numeral 43 denotes a trailing switch, reference numeral 44 denotes a trailing display lamp, and reference numeral 45 denotes a trailing impossible display unit which is a means for notifying trailing. The trailing operation can be turned ON / OFF by the trailing switch 43. When the trailing operation is ON, the trailing display lamp 44 is turned on.
[0064]
In the chasing operation, when the temperature of the hot water in the tank 1 is equal to or higher than 65 ° C. that can be chased, the bath circulation pump 9 is driven to circulate the hot water in the bath tub to the heat exchanger 3 so that the high-temperature Boil for 5 minutes in hot water.
[0065]
Like the kitchen remote controller, the overtaking impossible display section 45 is lit when the temperature of the hot water in the tank drops to 65 ° C. or less and the overtaking becomes impossible.
[0066]
When the rejection switch 45 is pressed while the rejection indicator 45 is lit, the mixing valve 12 is fully opened, the bath water supply valve 19 is opened, and the hot water in the tank 1 is supplied to the bathtub for 3 minutes. Perform hot water bath.
[0067]
If the amount of heat that can be contributed to the running calculated based on the respective temperatures detected by the three remaining hot water temperature sensors 11 does not reach the predetermined determination value, the running indicator lamp 44 is turned on and off and the running performance is insufficient. Insufficient ability display as a notification means is performed.
[0068]
Also in the case of boiling the remaining hot water the previous day by automatic bath operation, if the insufficient capacity is detected, the running-out indicator lamp is flashed to display the above-mentioned insufficient capacity.
[0069]
The boiling means realized by software boil the hot water in the tank 1 up to 90 ° C. at midnight in accordance with the power contract.
[0070]
The operation of the boiling means will be described with reference to FIG. When the hot water in the tank is to be heated, the heater 2 is energized to heat the hot water above the heater 2 in [S000]. At this time, the hot water above the heating heater 2 is evenly heated due to convection, and a separation layer of hot water and water is formed immediately below the heating heater 2 due to a difference in specific gravity.
[0071]
When the boiling temperature sensor 4 detects 91 ° C. in [S001], the boiling circulation pump 7 is driven in [S002]. When there is low-temperature hot water or water in the lower part of the tank 1, the upper part of the tank 1 is cooled. At this time, the shape of the outlet of the tank circulation path 6 is such that water is diffused, and the hot water at the top of the tank is cooled as a whole.
[0072]
If the boiling temperature sensor 4 detects less than 89 ° C. in [S003], the process returns to [S000] and stops the boiling circulating pump 7. The hot water in the upper part of the tank 1 rises while increasing the amount of water supplied by the circulating pump 7 while keeping a state of being separated from the water in the lower part by laminating from the difference in specific gravity.
[0073]
When the boiling circulation pump 7 is driven, the temperature does not decrease. When the boiling temperature sensor 5 detects 94 ° C. in [S004], it is determined that the tank has boiled down to the bottom of the tank. The energization of the raising and circulating pump 7 is stopped, and the boiling of the whole amount is completed.
[0074]
Next, the operation of the chasing means realized by software will be described with reference to FIG. First, in [S100], it is confirmed whether or not the temperature of the hot water in the tank 1 can be driven out. If the temperature is lower than 65 ° C., the purging operation is not performed, and the bath circulation pump 9 is stopped in [S101] to terminate the purging.
[0075]
In step S100, the purging is enabled when the purging temperature sensor 5 detects 65 ° C. or higher, and the bath circulation pump 9 is turned on in step S102 to circulate hot water in the bath tub to the purging heat exchanger 3 to heat the bath.
[0076]
The water flow is checked by the water flow detector 17 in [S103], and it is determined whether the driving operation is the warm-up operation of the automatic driving or the automatic driving operation in [S104] and [S105]. The process of [S100] to [S106] is looped while checking the minute purging time.
[0077]
If the temperature of the hot water in the tank 1 drops during the purging and a value less than 65 is detected in [S100], the purging is stopped at that point.
[0078]
If the purging is detected for 5 minutes in [S106], the bath temperature sensor 16 confirms that the bath water temperature is equal to or higher than the set bath temperature in [S107], and the bath circulation pump 9 is turned off in [S101]. And complete the chasing.
[0079]
Originally, it is possible to use the remaining hot water of the previous day even during the running-out operation for raising the temperature slightly during bathing by passing the determination of [S107].
[0080]
If the bath automatic is on in [S104], only the bath temperature is checked by the bath temperature sensor 16 in [S107], and when the bath temperature reaches the bath set temperature, the bath circulation pump 9 is turned off in [S101]. And complete the chasing.
[0081]
When the bathtub hot water temperature reaches the bath set temperature in [S107], completion of filling is determined in [S108], and the filling completion detecting means is realized. The determination of the completion of hot water filling is canceled at the timing of starting the heating of the entire amount of the water heater, which is the reference for one day.
[0082]
If the following operation is OFF in [S105], the automatic bathing operation and the following operation are turned off and the following operation is interrupted.
[0083]
Next, the hot-water boiling control means will be described. The hot water boiling control is controlled in four patterns corresponding to the remaining hot water setting set by the remaining hot water setting switch 29 in FIG.
[0084]
When the "large" setting is set, the amount of heat required for flushing is secured and the bath is automatically turned on, assuming that the bathtub is completely boiled until the flushing completion is confirmed by the flushing completion detection means. After the completion of the middle and hot water filling is determined, the amount of heat required for the chasing is secured on the assumption that the chasing will be additionally performed when taking a bath. When the "standard" setting is set, the amount of heat required for the hunting is ensured only by assuming that the hull is additionally rushed when taking a bath. When the setting is "slightly", no replenishment is performed, and a necessary amount of hot water is secured on the assumption that hot water will not run out. When the setting is “OFF”, the hot-water boiling control is not performed.
[0085]
Specifically, the purging temperature sensor 5 and the three remaining hot water temperature sensors 11 are installed at positions 70 L, 120 L, 170 L, and 220 L from the top of the tank 1, respectively. The position of the uppermost flushing temperature sensor 5 is set at 70 L in view of the ineffective hot water amount 20 L at the upper portion of the flushing heat exchanger 3 so that the actual hot water amount contributing to the flushing becomes 50 L.
[0086]
Using the temperatures detected by the driving temperature sensor 5 and the three remaining hot water temperature sensors 11, the driving heat amount is calculated. For example, if the purging temperature sensor 5 detects 85 ° C. and the remaining hot water temperature sensor 11 detects 85 ° C., 70 ° C., and 20 ° C. from above, it is determined that a portion above 65 ° C. can contribute to the purging, and the uppermost portion is
50L of driving contribution heat quantity Q1 = (85-65) × 50 × 4.2 kJ
50 L of driving heat Q2 = (85-65) × 50 × 4.2 kJ
50L of driving contribution heat quantity Q3 = (70-65) × 50 × 4.2 kJ
50L driving heat Q4 = 0kJ
And 9450 kJ.
[0087]
In the case of "Large" setting, it is assumed that the whole amount will be boiled up until the completion of hot water filling, so the necessary heat amount is set to 200L (assumed bathtub capacity) and the heat amount to boil 25K from 15 to 40 ° C. 21,000 kJ. However, in consideration of 30 minutes for the total heating, the worst heating heater 2 of 5 kW is turned on at the same time at the worst, and 12,000 kJ excluding the heating heater 2 for 9000 kJ is secured.
[0088]
In the above remaining hot water state, the chasing contribution heat quantity is 9450 kJ, so that the boiling means is started until the temperature is restored to 12000 kJ, and when the pressure reaches 12000 kJ, the boiling means is stopped and the hot water is drained. Actually, when the temperature drops below 12000 kJ, the heating starts, and when the temperature reaches 12000 kJ, the heating stops, and the frequency of ON / OFF increases. I do.
[0089]
After the bath automatic ON and the completion of hot water filling of the "large" setting, or at the time of the "standard" setting, it is assumed that additional flushing at the time of bathing is performed. In other words, the hot water is heated to ensure 4200 kJ.
[0090]
At the time of setting "Low", it is assumed that the hot water supply does not cause the hot water to run out. Therefore, when the remaining hot water temperature sensor at the top of the remaining hot water temperature sensors 11 becomes 55 ° C. or less and detects no hot water, the hot water is heated. To start. At this time, the remaining hot water is stopped when the remaining hot water temperature sensor reaches 60 ° C. and detects the remaining hot water. In this case, the minimum operation time is set to 30 minutes.
[0091]
When the setting is "OFF", the hot water is not heated.
[0092]
Next, the learning means for running out of hot water will be described. The hot water boiling learning means, when turned on by the automatic switch 28, checks the presence or absence of overtime of 5 minutes or less and the presence or absence of overtime of 5 minutes or less on a daily basis, and overtakes over 5 minutes. If there is, the remaining hot water setting is set to "large". If the remaining hot water setting is "large" and there is no overtaking for more than 5 minutes for seven consecutive days, the remaining hot water setting is switched to "standard".
[0093]
Also, if the remaining hot water setting is "less" and there is an overtaking of 5 minutes or less, set the remaining hot water setting to "standard", and if the remaining hot water setting is "standard" and there is no overtaking of 5 minutes or less for 7 consecutive days Switch the remaining hot water setting to "low".
[0094]
Next, the means for notifying the driving ability shortage will be described. At the time of starting the purging, the bathing temperature detected by the bath temperature sensor 16 is lower than the bath set temperature set by the bath temperature setting switch 38 by 5 K or more. In this case, the bathtub capacity is set to 200L, and the difference between the bathtub hot water temperature and the bath set temperature and the heat quantity required for boiling from 200L are calculated and compared with the chasing contributing heat quantity calculated by the draining and boiling control means. In the case where the amount of heat required for rushing is insufficient, the wake-up indicator lamp flashes to notify the user, and additional boiling is performed at the same time as rushing through the boiling means.
[0095]
Next, the operation and operation will be described.
[0096]
First, a heating heater 2 is provided at the upper part of the tank 1, and a heat exchanger 3 is provided at the top of the heater 2. When the hot water in the tank 1 is heated, the heating circulation pump 7 is driven while the heater 1 is stacked from the upper part of the tank 1. Since the hot water is used to heat the bath, the required high-temperature hot water can be quickly boiled even if the hot water in the tank is insufficient, and the amount of the hot water can be quickly increased. Since it can be secured freely, it cannot be overtaken by lack of heat and there is no need to use unnecessarily expensive power during the day.
[0097]
Further, since the purging means performs purging only under the condition that the hot water in the tank 1 can supply hot water at 50 ° C. or higher, the hot water remaining in the tank 1 can be used without waste.
[0098]
After the entire amount of water has been boiled using midnight power, the hot-water boiling control means monitors the amount of remaining hot water and the temperature of the remaining hot water, calculates the amount of contributing heat, and calculates the amount of contributing heat necessary for the purging. When the amount of heat is lower than the amount of heat, additional heating is performed by the boiling means, and the necessary amount of heat is always secured.
[0099]
In addition, the hot-water boiling control means constantly calculates the amount of contributing heat to determine whether or not to perform additional boiling. Therefore, additional boiling is performed only when necessary according to the amount of hot water used, so that wasteful and expensive operation is performed. No electricity is used during the day.
[0100]
Further, the hot water boiling control means secures the amount of heat in the tank 1 assuming that the entire bathtub is heated until the hot water filling completion detecting means detects the completion of hot water filling, and is added during the automatic bath and after the completion of the hot water filling. Since the amount of heat is switched to the securing of the amount of heat assuming the following, it is possible to change the amount of heat to be secured frequently in chronological order, thereby further reducing waste.
[0101]
In addition, in the worst case, the amount of heat to be ensured for the total heating is assumed, and the amount of heat to be secured in advance can be further reduced because it is assumed that overheating is performed while performing additional heating.
[0102]
Since the hot-water boiling control means uses a temporary bath temperature of 15 ° C. to secure the required amount of heat, it is possible to reduce the loss due to the heat radiation of the pipe generated by the circulation for detecting the bath water temperature. The excess and deficiency due to the error with the temporary bath tub hot water temperature generated at the start of the flushing can be covered without waste by the additional boiling performed at the time of the flushing.
[0103]
As shown in FIG. 5, the filling completion detecting means can be carried out simultaneously in the flushing process, so that it can be easily realized without the necessity of providing a special new process.
[0104]
If the temperature of the hot water in the tank 1 falls below the determination temperature by the following temperature sensor 5, the non-removable display section 32 of the kitchen remote controller and the non-removable display section 45 of the bathroom remote controller are turned on. The user can immediately understand and take appropriate measures such as bathing using hot water.
[0105]
By setting the remaining hot water setting to "OFF" with the remaining hot water setting switch 29 of the kitchen remote control unit, it is possible to prevent the additional boiling by the hot-water boiling control means, so that the user wants to give priority to economy over running out of hot water. It can respond to cases.
[0106]
Also, at this time, if the temperature of the hot water in the tank 1 falls below the temperature for judging by the expelling temperature sensor 5, the expelling impossible display section 32 of the kitchen remote controller and the expelling impossible display section 45 of the bathroom remote controller are turned on. This is more effective because the user can immediately understand that it cannot be driven out and take appropriate measures such as bathing using hot water.
[0107]
When the switch is turned ON by the automatic switch 28 of the kitchen remote controller, the remaining hot water setting is automatically changed based on the chronological use state of the chasing operation. It is possible to prevent a user who has only a shower from having a wasteful amount of heat for driving away.
[0108]
Further, since the setting change is automatically performed, the operability can be improved without bothering the user.
[0109]
Furthermore, since the remaining hot water setting can be temporarily changed by the remaining hot water setting switch 29 even when it is turned on automatically, a user who normally finishes showering can respond to a sudden use change by a simple operation.
[0110]
At the start of the bathing, when the bathtub hot water temperature can be detected, it is determined whether or not the amount of contributing heat in the tank 1 is insufficient, and if it is insufficient, the user is notified. It is possible to take measures such as draining the remaining hot water and boiling the bath with hot water, and eliminating waste of boiling the water halfway and then draining the hot water.
[0111]
The flushing switch 43 of the bathroom remote control unit is designed so that the hot water of 65 ° C. in the tank 1 is directly supplied to the hot tub when the flushing impossible display portion 45 is out, so that the flushing can be used. Even if it disappears, the hot water supply function can be realized without newly providing a switch. This allows the remaining hot water in the tank 1 to be used more effectively. This function is very effective for a user who uses the remaining hot water setting "OFF".
[0112]
(Example 2)
FIG. 6 is a main body configuration diagram showing the configuration of the electric water heater main body according to the second embodiment of the present invention.
[0113]
The second embodiment differs from the first embodiment in that the boiling temperature sensor is abolished, and the function of the boiling temperature sensor is also used in the chasing temperature sensor 46.
[0114]
The components having the same reference numerals as those in the first embodiment have the same structure, and a description thereof will be omitted.
[0115]
Next, the operation and operation will be described. First, when the heater 2 is energized to boil the hot water in the tank 1, the hot water above the heater 2 rises evenly by convection. Also, when the water in the lower portion of the tank 1 is mixed by the boiling circulation pump 7, the water having a high specific gravity is supplied so as to diffuse from the uppermost portion, so that the water is uniformly cooled. Therefore, the boiling temperature sensor only needs to be above the heating heater 2.
[0116]
Further, at the time of chasing, the hot water which has been deprived of heat by the chasing heat exchanger 3 descends downward and convects while mixing with the hot water. Therefore, at the time of flushing, the temperature of the hot water below the flushing heat exchanger 3 decreases uniformly.
[0117]
In other words, it suffices that the flushing temperature sensor 46 that detects the temperature of the hot water contributing to the flushing is lower than the flushing heat exchanger 3.
[0118]
As a result, the heat exchanger 3 is disposed above the heater 2 and the thermistor 46, which also functions as a temperature sensor, is positioned between the heater 2 and the heat exchanger 3. Attached to.
[0119]
As a result, the temperature sensor, the temperature detection circuit, and the temperature detection process can be reduced, and equivalent functions can be obtained.
[0120]
Note that the calorific value calculation is performed by fixing the capacity of the bathtub to a general 200 L in the hot water boiling control means and the insufficiency notifying means in each of the above-described embodiments. It is common to operate a test run sequence of hot water filling, in which the capacity of the bathtub and the horizontal cross-sectional area of the bathtub are detected, and the amount of hot water is calculated from the water level data detected by the water level sensor 18.
[0121]
That is, instead of setting the bathtub capacity to 200 L, the amount of hot water determined by the above calculation can be used for the calorific value calculation.
[0122]
【The invention's effect】
As described above, the electric water heater of the present invention is provided with a boiling heater at the upper part of the tank, and a flushing heat exchanger at the upper part thereof, while driving the boiling circulation pump when boiling the hot water in the tank. Since the configuration is such that the hot water is heated from the top of the tank in a layered state, it is possible to quickly boil the necessary high-temperature hot water even if the hot water in the tank is insufficient when the bath is flushed with a heat exchanger. Since the amount of heat can be freely secured, there is an effect that it is not possible to follow up due to a shortage of heat or to use unnecessarily expensive daytime electric power.
[Brief description of the drawings]
FIG. 1 is a main body configuration diagram showing a configuration of an electric water heater main body according to a first embodiment of the present invention.
FIG. 2 is an external view of a kitchen remote control of the electric water heater.
FIG. 3 is an external view of a bathroom remote control of the electric water heater.
FIG. 4 is a flowchart showing an operation of a heating means of the electric water heater.
FIG. 5 is a flowchart showing the operation of the driving means of the electric water heater.
FIG. 6 is a main body configuration diagram showing a configuration of an electric water heater main body according to a second embodiment of the present invention.
[Explanation of symbols]
1 tank
2 Boiling heater
3 Chasing heat exchanger
4 Boiling temperature sensor
5 Chasing temperature sensor
6 tank circulation path
7 Boiling circulation pump
8 Bath circuit
9 Bath circulation pump
10 Bathtub
11 Hot water temperature sensor (hot water detecting means)
12 Hot water supply piping
16 Bath temperature temperature sensor
17 Water flow detector
19 bath hot water valve
29 Remaining hot water setting switch (Selection means for running out of hot water)
30 remaining hot water setting display
32 Unfollowing indication section (means for unfollowing indication)
38 Bath temperature setting switch (bath temperature setting means)
44 Chasing indicator lamp (also used as a means for notifying chasing ability shortage)
45 Unfollowing indication section (means for unfollowing notification)
46 Chasing temperature sensor

Claims

A tank for storing hot water, which has a water supply port at the bottom and a tap hole at the top, and has a heating heater at the top inside, and communicates the lower and upper parts of this tank, and the water at the lower part of the tank through a boiling circulation pump. A circulation circuit for circulating water in the upper part of the tank, a flushing heat exchanger provided in the tank above the boiling heater, and the flushing heat exchanger and bath circulation pump are connected in the middle to circulate hot water in the bathtub. A bath circuit to be heated, a bath temperature sensor for detecting a temperature of hot water on a primary side of the bath circuit leading to the flushing heat exchanger, and a boiling temperature for detecting a temperature of the hot water in the tank above the heating heater. A sensor for detecting the temperature of hot water in the tank below the heat exchanger, and controlling the power supply to the heater to control the power supply to the heater. Boil the water in the tank to the predetermined boiling temperature, and supply the water at the bottom of the tank to the top of the tank with the boiling circulation pump so that the temperature at the top of the tank detected by the boiling temperature sensor maintains the predetermined boiling temperature. By controlling the boiling circulation pump to boil the water in the tank from the top to the lamination, and when the hot water temperature detected by the above-mentioned flushing temperature sensor is equal to or higher than the flushing determination temperature, the bath circulation pump is driven to drive the bath temperature. An electric water heater that boils water until the hot water temperature detected by the sensor reaches a predetermined temperature.

2. The electric water heater according to claim 1, wherein a flushing temperature sensor is provided at a position between the boiling heater and the flushing heat exchanger for detecting the temperature of the hot water in the tank, and also serves as the boiling temperature sensor.

The electric water heater according to claim 1 or 2, wherein the after-driving determination temperature is set to 50 ° C or higher at which hot water can be supplied.

Equipped with remaining hot water detection means for detecting the remaining hot water amount and remaining hot water temperature in the tank, and after the hot water in the tank has been completely heated through the boiling means at midnight according to the contract electric power system, the next full heating starts In the meantime, after the remaining hot water amount and the remaining hot water converted from the remaining hot water temperature fall below a predetermined hot-water determination value, a hot-water boiling control means for performing additional heating of a predetermined amount via the boiling means is provided. The electric water heater according to any one of claims 1 to 3.

Filling completion detecting means for detecting that hot water is filled in the bath tub is provided, and the drainage heating control means switches between the drainage determination value and the additional boiling amount before and after the filling is completed. 5. The electric water heater according to claim 4, wherein the setting of the out-of-water judging value and the additional boiling amount during and after the filling is set smaller than before the filling.

A bath detector that detects the presence or absence of circulating water in the bath circulation path and a bath temperature setting unit are provided. The bath filling completion detector detects the presence of circulating water when the bath circulation pump is driven. 6. The electric water heater according to claim 5, wherein the filling is completed when the bath water temperature detected by the bath temperature sensor is equal to or higher than the temperature set by the bath temperature setting means.

4. The method according to claim 1, further comprising: when the temperature of the hot water detected by the temperature sensor falls below the temperature for determining the temperature of the bath, the notifying means for notifying that the bathing means cannot perform the bathing. An electric water heater according to claim 1.

The hot-water boiling control means is provided with hot-water boiling-up selecting means for selecting whether or not to perform hot-water boiling. The electric water heater according to any one of claims 4 to 6, further comprising an unfollowing notifying means for notifying that the chasing means cannot perform the chasing after the bath.

4. A draining-boiler learning means for detecting a time-series operation state of the driving means and automatically switching the control pattern such as whether or not the draining-boiler control means performs the draining-boiler. 7. The electric water heater according to claim 6.

Equipped with remaining hot water detection means for detecting the remaining hot water amount and remaining hot water temperature in the tank, and the remaining hot water amount detected by the remaining hot water detection means based on the capacity shortage determination value corresponding to the bath tub temperature detected by the bath temperature sensor when starting flushing The electric water heater according to any one of claims 1 to 3, further comprising a notifying ability shortage notifying means for notifying the capacity shortage when the amount of contributing heat converted from the remaining hot water temperature is small.

Equipped with a tap water pipe connected to the tap at the top of the tank, a hot water supply pipe connecting the hot water supply pipe and the bath circulation bath, and a hot water supply valve that opens / closes hot water supply to the bathtub through the hot water supply pipe. The bathing means opens the bath water supply valve to supply hot water from the tank when the temperature of the hot water detected by the sensor becomes lower than the temperature for determining the running out and the bath cannot be bathed. An electric water heater according to any one of the preceding claims.