【発明の名称】貯湯式電気温水器
【特許請求の範囲】
【請求項１】下部から給水され上部から出湯される貯湯槽と、前記貯湯槽の内部に設けたヒーターと、前記ヒーターより上部の前記貯湯槽から取り出した湯水を前記貯湯槽の下部へ循環する循環ポンプと、前記循環ポンプの循環回路に前記貯湯槽から取り出した湯水と浴槽水を熱交換する風呂熱交換器と、前記貯湯槽の湯温を検出する温度検出手段とを有し、前記温度検出手段の温度が所定温度以上になった時に前記循環ポンプを運転することを特徴とする貯湯式電気温水器。
【請求項２】循環ポンプと風呂熱交換器の下流に、貯湯槽下部へ流れる循環回路Ａと前記貯湯槽の容量の中間近傍へ流れる循環回路Ｂとを切換る流路切換手段を設けた請求項１記載の貯湯式電気温水器。
【請求項３】運転開始信号を検出して流路切換手段を循環回路Ｂ側で制御して、その後、温度検出手段の温度が所定温度に達した時に前記流路切換手段を循環回路Ａ側に制御する制御手段を設けた請求項２記載の貯湯式電気温水器。
【請求項４】温度検知手段はヒーターより上部の貯湯槽の湯温を検出し、浴槽の保温運転を発信する保温運転手段と、前記保温運転手段の信号を検出して流路切換手段を循環回路Ｂ側に切換える制御手段と、前記温度検出手段の温度が所定温度以上になった時に循環ポンプを運転する運転制御手段を設けた請求項２記載の貯湯式電気温水器。
【請求項５】温度検知手段はヒーターより上部の貯湯槽の湯温を検出し、浴槽水の水温を検出する浴槽温度検出手段と、入浴終了後の浴槽残湯熱を回収する回収運転手段と、回収運転手段を検出して循環ポンプを運転するポンプ運転手段と、前記回収運転手段を検出して前記温度検出手段の温度が前記浴槽温度検出手段の温度より高温時に流路切換手段を循環回路Ａ側に制御する制御手段を設けた請求項２記載の貯湯式電気温水器。
【請求項６】温度検知手段はヒーターより上部の貯湯槽の湯温を検出し、浴槽水の水温を検出する浴槽温度検出手段と、入浴終了後の浴槽残湯熱を回収する回収運転手段と、回収運転手段を検出して循環ポンプを運転するポンプ運転手段と、前記回収運転手段の信号を検出して前記温度検出手段の温度信号と前記浴槽温度検出手段の温度信号が一致した後に前記ヒーターを通電する制御手段を設けた請求項１または２記載の貯湯式電気温水器。
【請求項７】運転停止信号を検出して流路切換手段を循環回路Ｂ側に切換える運転制御手段を設けた請求項１または２記載の貯湯式電気温水器。
【請求項８】循環ポンプと風呂熱交換器の下流に、貯湯槽の下部へ流れる循環回路Ａと端末機へ出湯する出湯回路とに切換る流路切換手段を設けた請求項１記載の貯湯式電気温水器。
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】
本発明は貯湯式電気温水器に関するものである。
【０００２】
【従来の技術】
従来、この種の貯湯式電気温水器は特開平５−１８４７号公報に示すようなものがある。以下、従来の技術について、図面に基づき説明する。図９において、ヒーター４０で加熱する電気温水器１Ａと、浴槽７の湯水を加熱する追焚きヒーター４１と、この追焚きヒーター４１に浴槽水を循環するポンプ８とを備え、追焚きヒーター４１で風呂の追焚きをおこなうようになっている。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記のような構成では、電気温水器１Ａのヒーター４０と風呂の追焚きヒーター４１を配するため、機器のコストが高くなるとともに電源の接続工事も多くなる。また、ヒーター４０は深夜時間に貯湯槽の容量全体を沸き上げるため電気容量も大きい。従って、ヒーター４０と追焚きヒーター４１を同時に通電しない制御になっている。そして、電気温水器１Ａは追焚き運転して貯湯槽１の湯水を沸き増すには貯湯槽１の全量の湯水を沸き上げなければならない。さらに、季節別に湯量を変えることもできない。また、風呂追焚きヒーター４１は１００Ｖ電源が多いため、加熱パワー不足による追焚き時間がかかる。
【０００４】
本発明は上記課題を解決するものであり、給湯追焚き機能、貯湯槽全量沸き上げ機能および風呂追焚き機能が水回路に開閉弁など部品を設けることもなく、１箇所のヒーターで簡単な装置で実現する。また、風呂追焚き時は深夜に貯湯槽を沸き上げるヒーターで加熱してスピード加熱する。
【０００５】
【課題を解決するための手段】
前記課題を解決するため、本発明は、下部から給水され上部から出湯される貯湯槽と、貯湯槽の内部に設けたヒーターと、ヒーターより上部の貯湯槽から取り出した湯水を貯湯槽の下部へ循環する循環ポンプと、循環ポンプの循環回路に貯湯槽から取り出した湯水と浴槽水を熱交換する風呂熱交換器を備え、貯湯槽全量を湯に沸き上げる運転において、ヒーターを通電して、ヒーターの設置位置から上部の貯湯槽内の湯水を沸き上げ、循環ポンプで貯湯槽下部へ循環する。この運転を繰り返しながら貯湯槽内の湯水を全量沸き上げる。また、湯切れ時あるいは追焚き時において、循環ポンプを停止した状態でヒーターを通電して、ヒーター上部の湯水を沸き上げて給湯に利用する。次に、風呂追焚き運転において、温度検出手段の温度が所定温度以上になった時に循環ポンプを運転することにより、風呂熱交換器を介して貯湯槽上部の高温湯で浴槽の湯水を加熱する。従って、給湯追焚き機能、貯湯槽全量沸き上げ機能および風呂追焚き機能が水回路に開閉弁など部品を設けることもなく、１箇所のヒーターで簡単な装置で実現する。また、風呂追焚き時は深夜に貯湯槽を沸き上げるヒーターで加熱してスピード加熱する。
【０００６】
【発明の実施の形態】
本発明の請求項１に記載の発明は、下部から給水され、上部から出湯される貯湯槽と、貯湯槽の内部に設けたヒーターと、ヒーターより上部の貯湯槽から取り出した湯水を貯湯槽の下部へ循環する循環ポンプと、循環ポンプの循環回路に貯湯槽から取り出した湯水と浴槽水を熱交換する風呂熱交換器と、前記貯湯槽の湯温を検出する温度検出手段とを有し、前記温度検出手段の温度が所定温度以上になった時に前記循環ポンプを運転することを特徴とする。貯湯槽全量を湯に沸き上げる運転において、ヒーターを通電して、ヒーターの設置位置から上部の貯湯槽内の湯水を沸き上げ、循環ポンプで貯湯槽下部へ循環する。この運転を繰り返しながら貯湯槽内の湯水を全量沸き上げる。また、湯切れ時あるいは追焚き時において、循環ポンプを停止した状態でヒーターを通電して、ヒーター上部の湯水を沸き上げて給湯に利用する。次に、風呂追焚き運転において、貯湯槽の湯温を検出する温度検出手段の温度が所定温度以上になった時に循環ポンプを運転することにより、風呂熱交換器を介して貯湯槽上部の高温湯で浴槽の湯水を加熱する。従って、給湯追焚き機能、貯湯槽全量沸き上げ機能および風呂追焚き機能が水回路に開閉弁など部品を設けることもなく、１箇所のヒーターで簡単な装置で実現する。また、風呂追焚き時は深夜に貯湯槽を沸き上げるヒーターで加熱してスピード加熱する。
【０００７】
また、請求項２に記載の発明は、循環ポンプと風呂熱交換器の下流に、貯湯槽下部へ流れる循環回路Ａと貯湯槽の容量の中間近傍へ流れる循環回路Ｂとを切換る流路切換手段を備え、給湯負荷が少ない日あるいは季節の沸き上げ運転、あるいは短時間高加熱能力で風呂追焚き運転をおこなう場合には、循環回路Ｂで運転をおこない、貯湯槽容量のおよそ上部半分を沸き上げて利用する。従って、給湯負荷に応じて沸き上げる湯量を変えることができるため、貯湯槽からの放熱ロスが少なく省エネとなる。
【０００８】
また、請求項３に記載の発明は、運転開始信号を検出して流路切換手段を循環回路Ｂ側で制御して、その後、温度検出手段の温度が所定温度に達した時に流路切換手段を循環回路Ａ側に制御する制御手段を備え、運転開始直後は貯湯槽上部から貯湯槽容量の中間近傍へ流れる循環回路Ｂで沸き上げ運転して貯湯槽上部に湯を貯湯する。そして、所定温度に達した時に、貯湯槽上部から貯湯槽下部へ流れる循環回路Ａで沸き上げ運転を継続して、貯湯槽全量の湯水を沸き上げる。従って、貯湯槽上部に所定の湯量を確保しながら、貯湯槽全量を沸き上げるため、いつでも出湯利用できる。
【０００９】
また、請求項４に記載の発明は、温度検知手段はヒーターより上部の貯湯槽の湯温を検出し、浴槽の保温運転を発信する保温運転手段と、保温運転手段の信号を検出して流路切換手段を循環回路Ｂ側に切換える制御手段と、温度検出手段の温度が所定温度以上になった時に循環ポンプを運転する運転制御手段を備え、風呂保温追焚き運転時に貯湯槽上部の湯温が所定温度以上になると循環ポンプを運転して風呂熱交換器で浴槽水を加熱する。そして、風呂熱交換器で放熱して温度低下した循環回路の湯水は貯湯槽の中間位置へ流入する。従って、風呂保温追焚き運転時は沸き上げる湯量が半分となるため、昇温が２倍となりスピード加熱できる。
【００１０】
また、請求項５に記載の発明は、温度検知手段はヒーターより上部の貯湯槽の湯温を検出し、浴槽水の水温を検出する浴槽温度検出手段と、入浴終了後の浴槽残湯熱を回収する回収運転手段と、回収運転手段を検出して循環ポンプを運転するポンプ運転手段と、回収運転手段を検出して温度検出手段の温度が浴槽温度検出手段の温度より高温時に流路切換手段を循環回路Ａ側に制御する制御手段を備え、入浴終了後の浴槽残湯熱を回収する回収運転時に貯湯槽上部の湯温が浴槽温度より高温の場合に流路切換手段を循環回路Ａ側にして貯湯槽下部に流入させる。このことによって、貯湯槽のほぼ全量に近い給水された低温水と貯湯槽上部の少量の高温残湯水が混合して貯湯槽上部の高温湯は温度低下して浴槽温度より低温となる。従って、貯湯槽上部に残湯がある場合でも、入浴終了後の浴槽残湯熱を回収することができるため、ヒーターの消費電力量は削減でき、省エネとなる。
【００１１】
また、請求項６に記載の発明は、温度検知手段はヒーターより上部の貯湯槽の湯温を検出し、浴槽水の水温を検出する浴槽温度検出手段と、入浴終了後の浴槽残湯熱を回収する回収運転手段と、回収運転手段を検出して循環ポンプを運転するポンプ運転手段と、回収運転手段の信号を検出して温度検出手段の温度信号と浴槽温度検出手段の温度信号が一致した後にヒーターを通電する制御手段を備え、入浴終了後の浴槽残湯熱を回収する回収運転時に貯湯槽上部から流出する水温と浴槽水の水温が一致するまで浴槽残湯熱を回収する。そして、その後にヒーターを通電して貯湯槽を沸き上げる。従って、回収運転時に浴槽残湯熱を最大に有効回収できる。
【００１２】
また、請求項７に記載の発明は、運転停止信号を検出して流路切換手段を循環回路Ｂ側に切換える運転制御手段を備え、沸き上げ運転終了後の運転停止時に循環回路内の高温湯が配管を介して放熱して、密度差による貯湯槽上部から下部への自然循環するのを抑える。従って、貯湯槽上部の高温湯が循環して生じる放熱ロスを抑制することができる。
【００１３】
また、請求項８に記載の発明は、循環ポンプと風呂熱交換器の下流に、貯湯槽の下部へ流れる循環回路Ａと端末機の出湯回路とに切換る流路切換手段を備え、貯湯槽上部の湯を風呂熱交換器、循環ポンプ、流路切換手段を介して出湯回路から端末機で出湯する。従って、貯湯槽上部の高温湯で風呂保温追焚きしながら、温度低下した適温湯を端末機で出湯できる。また、循環ポンプを運転することにより２階などへ出湯できるため、利便性が向上する。
【００１４】
【実施例】
以下本発明の実施例を図を参照して説明する。なお、従来例および各実施例において、同じ構成、同じ動作をするものについては同一符号を付し、詳細な説明を省略する。
【００１５】
（実施例１）
図１は本発明の実施例１の貯湯式電気温水器の構成図である。図１において、１は貯湯槽であり、給水管２の水が下部から給水され、上部から出湯管３を通じて出湯する。４はヒーターであり、貯湯槽１の中の上部に設けられている。５は循環ポンプであり、ヒーター４上部の貯湯槽１の湯水を貯湯槽１の最下部近傍位置へ循環する。６は風呂熱交換器であり、循環ポンプ５の循環回路に設けられて、貯湯槽１上部から取り出した湯水と浴槽７の湯水が熱交換する。８は風呂ポンプであり、浴槽７の湯水を風呂熱交換器６へ循環する。
【００１６】
つぎに、上記構成の実施例１の動作について説明する。最初に貯湯槽１に給水された水から貯湯槽全量を湯に沸き上げる運転について述べる。
【００１７】
ヒーター４を通電して、ヒーター４の設置位置から上部の貯湯槽１内の湯水を沸き上げ、循環ポンプ５で貯湯槽１下部へ循環する。この運転を繰り返しながら貯湯槽１内の湯水を全量沸き上げる。また、湯切れ時あるいは追い焚き時において、循環ポンプ５を停止した状態でヒーター４を通電して、ヒーター４上部の湯水を沸き上げて給湯に利用する。
【００１８】
次に、風呂の追焚き運転について述べる。風呂ポンプ８の運転で浴槽７の湯水は風呂熱交換器６へ流入する。一方、循環ポンプ５の運転で貯湯槽１上部の高温湯が風呂熱交換器６の循環回路を流れて、ここで浴槽７の湯水を加熱する。そして、浴槽７の湯水は温度上昇して高温となって風呂熱交換器６から流出して浴槽７へ戻る。一方、放熱して温度低下した循環回路の湯水は風呂熱交換器６から貯湯槽１下部へ流れる。従って、給湯追焚き機能、貯湯槽全量沸き上げ機能および風呂追焚き機能が水回路に開閉弁など部品を設けることもなく、１箇所のヒーターで簡単な装置で実現できる。また、風呂追焚き時は深夜に貯湯槽を沸き上げるヒーターで加熱できるためスピード加熱できる。
【００１９】
（実施例２）
図２は本発明の実施例２の貯湯式電気温水器の構成図である。図２において、９は流路切換手段であり、循環ポンプ５及び風呂熱交換器６の下流に設けられ、貯湯槽１下部へ流れる循環回路Ａ１０と貯湯槽１の容量の中間近傍へ流れる循環回路Ｂ１１とを切換える。１２は制御手段であり、貯湯槽に沸き上げる湯量を少量にして沸き上げる運転をおこなう、あるいは風呂追焚き運転をおこなう手動スイッチ１３からの信号を検出して流路切換手段９を循環回路Ｂ１１側に切換える。
【００２０】
つぎに、上記構成の実施例２の動作について説明する。給湯負荷が少ない日あるいは夏季など給湯負荷が少ない季節の沸き上げ運転の場合、手動スイッチ１３からの信号を検出して制御手段１２が流路切換手段９を循環回路Ｂ１１側に切換える。そして、貯湯槽１上部から流出した湯を貯湯槽１の容量の中間近傍へ戻す循環回路Ｂ１１で運転をおこない、このサイクルを繰り替えしながら貯湯槽１の容量のおよそ上部半分を沸き上げる。次に、風呂追焚き運転をおこなう場合、手動スイッチ１３からの信号を検出して流路切換手段９を循環回路Ｂ１１側に切替える。そして、貯湯槽１上部から流出した湯を風呂熱交換器６へ流して浴槽７の湯水へ放熱する。放熱した循環回路の湯水は貯湯槽１の容量の中間近傍へ戻り、再度ヒーター４で加熱される。従って、給湯負荷に応じて沸き上げる湯量を変えるため、貯湯槽からの放熱ロスが少なく省エネとなる。また、風呂追焚き時の加熱循環サイクルを短くして追焚き時間を短縮する。
【００２１】
（実施例３）
図３は本発明の実施例３の貯湯式電気温水器の構成図である。図３において、１４は温度検出手段であり、循環回路Ｂ１１から貯湯槽１へ流入する接続口近傍の貯湯槽１の湯温を検出する。１５は制御手段であり、運転開始信号１６を検出して流路切換手段９から循環回路Ｂ１１側へ湯水が流れるように制御して、その後、温度検出手段１４の信号が所定温度の信号に達した時に循環回路Ｂ１１側から循環回路Ａ１０側へ湯水が流れるように切換える。
【００２２】
つぎに、上記構成の実施例の動作について説明する。運転開始信号１６で運転を開始した直後は貯湯槽１上部から貯湯槽１容量の中間近傍へ流れる循環回路Ｂ１１で沸き上げ運転して貯湯槽１へ流入する接続口より上部に湯を貯湯する。そして、貯湯した湯が所定温度に達した時に、貯湯槽１上部から貯湯槽１下部へ流れる循環回路Ａ１０へ切換えて沸き上げ運転を継続して、貯湯槽１全量の湯水を沸き上げる。従って、貯湯槽上部に所定の湯量を確保しながら、貯湯槽全量を沸き上げるため、いつでも出湯利用できる。
【００２３】
（実施例４）
図４は本発明の実施例４の貯湯式電気温水器の構成図である。図４において、１７は温度検出手段であり、ヒーター４より上部の貯湯槽１の湯温を検出する。１８は保温運転手段であり、浴槽の保温運転をおこなうスイッチである。１９は制御手段であり、保温運転手段１８の信号を検出して流路切換手段９を循環回路Ｂ１１側に切換えて湯水が流れるようにする。２０は運転制御手段であり、温度検出手段１７の信号が所定温度以上を発信した時に循環ポンプ５を運転する。
【００２４】
つぎに、上記構成の実施例の動作について説明する。
【００２５】
風呂保温追焚き運転時に貯湯槽１上部の湯温が所定温度以上になると循環ポンプ５を運転して風呂熱交換器６で浴槽水を加熱する。そして、風呂熱交換器６で放熱して温度低下した循環回路の湯水は貯湯槽１の中間位置へ流入する。従って、風呂保温追焚き運転時は沸き上げる湯量が半分となるため、昇温が２倍となりスピード加熱できる。
【００２６】
（実施例５）
図５は本発明の実施例５の貯湯式電気温水器の構成図である。図５において、２１は温度検出手段であり、ヒーター４より上部の貯湯槽１の湯温を検出する。２２は浴槽温度検出手段であり、浴槽７の水温を検出する。２３は回収運転手段であり、入浴終了後の浴槽残湯熱を回収する運転手段である。２４はポンプ運転手段であり、回収運転手段２３を検出して循環ポンプ５を運転する。２５は制御手段であり、回収運転手段２３を検出して温度検出手段２１の温度信号が浴槽温度検出手段２２の温度信号より高温信号時に流路切換手段９を循環回路Ａ１０側に湯水が循環するようにする。
【００２７】
つぎに、上記構成の実施例の動作について説明する。
【００２８】
入浴終了後の浴槽残湯熱を回収する回収運転時に循環ポンプ５を運転する。そして、貯湯槽１上部の湯温が浴槽７の温度より高温の場合に流路切換手段９を循環回路Ａ１０側にして貯湯槽１上部の湯を貯湯槽下部に流入させる。このことによって、貯湯槽１のほぼ全量に近い給水された低温水と貯湯槽１上部の少量の高温残湯水が混合して貯湯槽１上部の高温湯は温度低下して浴槽７の温度より低温となる。従って、貯湯槽１に残湯があり、貯湯槽１上部の残湯温度が浴槽の温度より高温の場合においても、入浴終了後の浴槽残湯熱を回収することができるため、ヒーターの消費電力量は削減でき、省エネとなる。
【００２９】
（実施例６）
図６は本発明の実施例６の貯湯式電気温水器の構成図である。図６において、２６は温度検出手段であり、ヒーター４より上部の貯湯槽１の湯温を検出する。２７は浴槽温度検出手段であり、浴槽７の水温を検出する。２８は回収運転手段であり、入浴終了後の浴槽残湯熱を回収する運転手段である。２９はポンプ運転手段であり、回収運転手段２８を検出して循環ポンプ５を運転する。３０は制御手段であり、回収運転手段２８の信号を検出して温度検出手段２６の温度信号と浴槽温度検出手段２７の温度信号が一致した後にヒーター４を通電する。
【００３０】
つぎに、上記構成の実施例の動作について説明する。
【００３１】
入浴終了後の浴槽残湯熱を回収する回収運転の場合に循環ポンプ５を運転する。そして、貯湯槽１上部から流出する湯水は浴槽７の残湯熱を集熱し、昇温して貯湯槽１に流入する。一方、浴槽７の残湯水は温度低下して浴槽７に戻る。この運転を繰り返しながら浴槽７の残湯熱を回収する。そして、貯湯槽１上部から流出する水温と浴槽７の水温が一致するまで浴槽残湯熱を回収する。その後、ヒーター４を通電して貯湯槽１を沸き上げる。従って、回収運転時にヒーター４を通電しないため、貯湯槽１の水温上昇は回収熱で上昇するため緩やかであり、また浴槽回収運転時に浴槽残湯熱を最大に有効回収できる。
【００３２】
（実施例７）
図７は本発明の実施例７の貯湯式電気温水器の構成図である。図７において、３１は運転制御手段であり、手動スイッチなど運転停止信号３２を検出して流路切換手段９を循環回路Ｂ１１側に切換える。
【００３３】
つぎに、上記構成の実施例の動作について説明する。
【００３４】
貯湯槽１の湯水の沸き上げ運転を停止した時に流路切換手段９を循環回路Ｂ１１側に切換える。それによって、貯湯槽１の外部の循環回路内の高温湯が配管を介して放熱する際に密度差による貯湯槽１上部から下部への自然循環するのを抑える。従って、貯湯槽上部の高温湯が循環して生じる放熱ロスを抑制することができる。
【００３５】
（実施例８）
図８は本発明の実施例８の貯湯式電気温水器の構成図である。図８において、３３は流路切換手段であり、循環ポンプ５と風呂熱交換器６の下流に貯湯槽１の下部へ流れる循環回路Ａ１０と端末機３４へ出湯する出湯回路３５に切換る。
【００３６】
つぎに、上記構成の実施例の動作について説明する。
【００３７】
貯湯槽１の湯を端末機３４から出湯する場合に、貯湯槽１上部の湯を風呂熱交換器６、循環ポンプ５、流路切換手段３３を介して出湯回路３５を通り端末機３４から出湯する。従って、貯湯槽１上部の高温湯で風呂保温追焚きしながら、温度低下した適温湯を端末機３４から出湯できる。また、循環ポンプ５を運転することにより２階などへ出湯できるため、利便性が向上する。
【００３８】
【発明の効果】
以上の説明からも明らかのように、本発明によれば、給湯追焚き機能、貯湯槽全量沸き上げ機能および風呂追焚き機能が１箇所のヒーターを用いて、かつ水回路に開閉弁など部品を設けることもなく簡単な装置で実現できる。また、風呂追焚き時にスピード加熱できる。
【図面の簡単な説明】
【図１】本発明の実施例１における貯湯式電気温水器の構成図
【図２】本発明の実施例２における貯湯式電気温水器の構成図
【図３】本発明の実施例３における貯湯式電気温水器の構成図
【図４】本発明の実施例４における貯湯式電気温水器の構成図
【図５】本発明の実施例５における貯湯式電気温水器の構成図
【図６】本発明の実施例６における貯湯式電気温水器の構成図
【図７】本発明の実施例７における貯湯式電気温水器の構成図
【図８】本発明の実施例８における貯湯式電気温水器の構成図
【図９】従来の貯湯式電気温水器の構成図
【符号の説明】
１ 貯湯槽
４ ヒーター
５ 循環ポンプ
６ 風呂熱交換器
９、２３ 流路切換手段
１０ 循環回路Ａ
１１ 循環回路Ｂ
１２ 制御手段
１４、１７、２１、２６ 温度検出手段
１５、１９、２５、３０ 制御手段
１６ 運転開始信号
１８ 保温運転手段
２０、３１ 運転制御手段
２２、２７ 浴槽温度検出手段
２３、２８ 回収運転手段
２４、２９ ポンプ運転手段
３２ 運転停止信号
３４ 端末機
３５ 出湯回路[Name of the invention] A hot water storage type electric water heater [Claim of claim]
And 1. A hot water storage tank which is tapped from the upper portion is the water supply from the lower, a heater provided inside the hot water tank, the hot water taken out from the hot water storage tank at the top than the heater to the bottom of the hot water storage tank The circulation pump includes a circulating pump, a circulation circuit of the circulating pump, a bath heat exchanger for exchanging heat between hot water and bath water extracted from the hot water storage tank, and temperature detection means for detecting the hot water temperature of the hot water storage tank. A hot water storage type electric water heater characterized in that the circulating pump is operated when the temperature of the temperature detecting means reaches a predetermined temperature or more .
2. A flow path switching means for switching between a circulation circuit A flowing to the lower part of the hot water storage tank and a circulation circuit B flowing to the vicinity of the middle of the capacity of the hot water storage tank downstream of the circulation pump and the bath heat exchanger The water storage type electric water heater according to Item 1.
3. A controlled by detecting OPERATION start signal channel switching means in the circulation circuit B side, circulating said flow path switching means when after that, the temperature of the temperature detection means reaches a predetermined temperature The storage water type electric water heater according to claim 2, further comprising control means for controlling the circuit A side.
Wherein temperature detecting means detects the water temperature of the hot water storage tank above the heater, the maintenance operation means for transmitting the maintenance operation of the bath tub, the channel switching means to detect a signal of the maintenance operation means The hot water storage type electric water heater according to claim 2, further comprising: control means for switching to the circulation circuit B side, and operation control means for operating the circulation pump when the temperature of the temperature detection means reaches a predetermined temperature or more.
5. The temperature detecting means detects the water temperature of the hot water storage tank above the heater, the bath temperature detecting means for detecting the water temperature of the bath tub water, recovery operation means for recovering tub Zan'yunetsu after bathing completion And pump operation means for detecting the recovery operation means to operate the circulation pump, and circulating the flow path switching means when the temperature of the temperature detection means is higher than the temperature of the bathtub temperature detection means by detecting the recovery operation means The storage water type electric water heater according to claim 2, further comprising control means for controlling the circuit A side.
6. The temperature detecting means detects the water temperature of the hot water storage tank above the heater, the bath temperature detecting means for detecting the water temperature of the bath tub water, recovery operation means for recovering tub Zan'yunetsu after bathing completion A pump operation means for detecting the recovery operation means to operate the circulation pump, and a signal of the recovery operation means for detecting the temperature signal of the temperature detection means after the temperature signal of the bathtub temperature detection means matches. The storage water type electric water heater according to claim 1 or 2, further comprising control means for energizing the heater.
7. A storage-type electric water heater according to claim 1, wherein providing the operation control means for switching the flow path switching unit detects the operation stop signal to the circulation circuit B side.
8. A hot water storage system according to claim 1, further comprising flow path switching means for switching between a circulation circuit A flowing to the lower part of the hot water storage tank and a hot water discharge circuit for discharging water to the terminal downstream of the circulation pump and the bath heat exchanger. Type electric water heater.
Detailed Description of the Invention
[0001]
Field of the Invention
The present invention relates to a hot water storage type electric water heater.
[0002]
[Prior Art]
Heretofore, there is a storage water type electric water heater of this type as shown in Japanese Patent Laid-Open No. 5-1847. Hereinafter, the prior art will be described based on the drawings. In FIG. 9, the electric water heater 1A heated by the heater 40, the additional heater 41 for heating the hot and cold water of the bath 7, and the pump 8 for circulating bath water to the additional heater 41 are provided. It is supposed to carry out a bath recollection.
[0003]
[Problems to be solved by the invention]
However, in the configuration as described above, since the heater 40 of the electric water heater 1A and the supplementary heater 41 for the bath are disposed, the cost of the device is increased and the work of connecting the power supply is also increased. In addition, since the heater 40 boils the entire capacity of the hot water storage tank at midnight, the electric capacity is also large. Therefore, the control is such that the heater 40 and the additional heater 41 are not energized at the same time. Then, the electric water heater 1A must be driven to follow up and boil the hot and cold water of the hot water storage tank 1 by boiling the whole hot and cold water of the hot water storage tank 1. Furthermore, it is not possible to change the amount of hot water according to the season. Further, since the bath reheating heater 41 has a large number of 100 V power supplies, it takes a rehearsal time due to insufficient heating power.
[0004]
The present invention solves the above-mentioned problems, and it is a simple device with one heater, without providing parts such as the on-off valve in the water circuit without providing functions such as the on-off valve in the water circuit. To achieve. In addition, at the time of bath reheating, heating is performed with a heater that boil the hot water storage tank at midnight, and speed heating is performed.
[0005]
[Means for Solving the Problems]
To solve the above problems, the present invention includes a hot water tank which is tapped from the upper portion is the water supply from the lower, a heater provided inside the hot water tank, the hot water taken out from the hot water storage tank above the heater of the hot water storage tank A circulation pump that circulates to the lower part, and a bath heat exchanger that exchanges heat between hot water and bath water extracted from the hot water storage tank in the circulation circuit of the circulation pump, and operates the heater to energize the entire hot water storage tank Boil the hot water in the upper storage tank from the installation position of the heater, and circulate it to the lower part of the storage tank with a circulation pump. While repeating this operation, the entire hot and cold water in the hot water storage tank is boiled. In addition, when the hot water runs out or is being reheated, the heater is turned on while the circulation pump is stopped, and the hot water in the upper part of the heater is boiled and used for hot water supply. Next, in the bath reheating operation, when the temperature of the temperature detection means reaches a predetermined temperature or more, the hot water in the bath is heated by the high temperature hot water at the upper part of the hot water storage tank by operating the circulation pump. . Therefore, the hot water supply reserving function, the storage tank boiling function, and the bath reworking function can be realized by a simple device with a single heater without providing parts such as an on-off valve in the water circuit. In addition, at the time of bath reheating, heating is performed with a heater that boil the hot water storage tank at midnight, and speed heating is performed.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention is a water storage tank supplied with water from the lower part and discharged from the upper part, a heater provided inside the water storage tank, and hot and cold water taken out from the water storage tank above the heater. The circulation pump circulating to the lower portion, a circulation circuit of the circulation pump, a bath heat exchanger for exchanging heat between hot water and bath water extracted from the hot water storage tank, and temperature detection means for detecting the hot water temperature of the hot water storage tank The circulation pump is operated when the temperature of the temperature detection means reaches a predetermined temperature or more. In the operation of boiling the entire storage tank into hot water, the heater is energized to boil the hot and cold water in the upper storage tank from the installation position of the heater and circulate it to the lower part of the storage tank by the circulation pump. While repeating this operation, the entire hot and cold water in the hot water storage tank is boiled. In addition, when the hot water runs out or is being reheated, the heater is turned on while the circulation pump is stopped, and the hot water in the upper part of the heater is boiled and used for hot water supply. Next, in the bath reheating operation, by operating the circulation pump when the temperature of the temperature detection means for detecting the temperature of the hot water storage tank reaches a predetermined temperature or higher, the high temperature of the upper portion of the hot water storage tank via the bath heat exchanger Heat the bath water with hot water. Therefore, the hot water supply reserving function, the storage tank boiling function, and the bath reworking function can be realized by a simple device with a single heater without providing parts such as an on-off valve in the water circuit. In addition, at the time of bath reheating, heating is performed with a heater that boil the hot water storage tank at midnight, and speed heating is performed.
[0007]
The invention according to claim 2 is a flow path switching method for switching between the circulation circuit A flowing to the lower part of the hot water storage tank and the circulation circuit B flowing near the middle of the capacity of the hot water storage tank downstream of the circulation pump and the bath heat exchanger. If the system is equipped with a means and the hot water supply load is small on a day or season, or if the bath reheating operation is performed with high heating capacity for a short time, operation is performed in the circulation circuit B to boil approximately the upper half of the storage tank capacity. Raise and use. Therefore, since the amount of hot water to be boiled can be changed according to the hot water supply load, the heat radiation loss from the hot water storage tank is small and energy saving can be achieved.
[0008]
The invention according to claim 3 controls to detect OPERATION start signal channel switching means in the circulation circuit B side, then, the flow passage changeover when the temperature of the temperature detection means reaches a predetermined temperature Control means is provided to control the means to the side of the circulation circuit A. Immediately after the start of operation, the circulation circuit B flowing from the top of the hot water storage tank to near the middle of the hot water storage tank capacity performs boiling operation to store hot water in the upper part of the hot water storage tank. Then, when the predetermined temperature is reached, the boiling operation is continued in the circulation circuit A flowing from the upper part of the hot water storage tank to the lower part of the hot water storage tank, and the hot water of the hot water storage tank is boiled up. Therefore, it is possible to use the hot water at any time in order to boil the entire hot water storage tank while securing a predetermined hot water amount in the upper part of the hot water storage tank.
[0009]
Further, an invention according to claim 4, the temperature sensing means detects the hot water temperature of the hot water storage tank above the heater, the maintenance operation means for transmitting the maintenance operation of the bath tank, by detecting the signal of the maintenance operation means A control means for switching the flow path switching means to the circulation circuit B side and an operation control means for operating the circulation pump when the temperature of the temperature detection means reaches a predetermined temperature or more. When the temperature reaches a predetermined temperature or more, the circulation pump is operated to heat the bath water with the bath heat exchanger. And the hot and cold water of the circulation circuit which thermally radiated by the bath heat exchanger and lowered in temperature flows into the middle position of the hot water storage tank. Therefore, since the amount of boiling water to be boiled is halved at the time of bath heat retention and reheating operation, the temperature rise is doubled, and speed heating can be performed.
[0010]
The invention described in Claim 5, the temperature detecting means detects the water temperature of the hot water storage tank above the heater, the bath temperature detecting means for detecting the water temperature of the bath tub water tub after bathing completion Zan'yunetsu The recovery operation means for recovering, the pump operation means for operating the circulation pump by detecting the recovery operation means, and the flow path switching when the temperature of the temperature detection means is higher than the temperature of the bath temperature detection means by detecting the recovery operation means Control means for controlling the means to the side of the circulation circuit A, and when the hot water temperature at the upper portion of the hot water storage tank is higher than the bath temperature at the time of recovery operation for recovering the bath residual water heat after bathing Turn it to the side and let it flow into the lower part of the storage tank. As a result, the low temperature water supplied close to almost all of the hot water storage tank mixes with a small amount of high temperature residual hot water at the top of the hot water storage tank, the temperature of the high temperature hot water at the top of the hot water storage tank decreases and becomes lower than the bath temperature. Therefore, even if there is residual water at the top of the storage tank, the heat of the residual water after bathing can be recovered, so the power consumption of the heater can be reduced, resulting in energy saving.
[0011]
The invention of claim 6, the temperature sensing means detects the hot water temperature of the hot water storage tank above the heater, the bath temperature detecting means for detecting the water temperature of the bath tub water tub after bathing completion Zan'yunetsu Of the recovery operation means, the pump operation means of operating the circulation pump by detecting the recovery operation means, and the temperature signal of the temperature detection means and the temperature signal of the bathtub temperature detection means by detecting the signals of the recovery operation means After that, a control means is provided to energize the heater, and during the recovery operation for recovering the heat of the bath residual water after bathing, the heat of the bath residual water is recovered until the water temperature flowing out from the upper portion of the hot water storage tank matches the water temperature of the bath water. After that, the heater is energized to boil the hot water storage tank. Therefore, it is possible to effectively recover the residual heat of the bath during recovery operation.
[0012]
The invention according to claim 7 further includes operation control means for detecting the operation stop signal and switching the flow path switching means to the circulation circuit B side, and the high temperature water in the circulation circuit at the time of operation stop after the boiling operation is finished. The heat is dissipated through the piping, and the natural circulation from the top to the bottom of the storage tank due to the density difference is suppressed. Therefore, it is possible to suppress the heat radiation loss caused by the circulation of the high temperature water at the upper part of the hot water storage tank.
[0013]
The invention according to claim 8 is characterized in that it comprises, downstream of the circulation pump and the bath heat exchanger, flow path switching means for switching to the circulation circuit A flowing to the lower part of the hot water storage tank and the hot water discharge circuit of the terminal. The hot water in the upper part is discharged from the hot water outlet circuit by the terminal through the bath heat exchanger, the circulation pump, and the flow path switching means. Therefore, it is possible to put out the appropriate hot water whose temperature has been lowered with the terminal while keeping the bath warm with hot water at the upper part of the hot water storage tank. Moreover, since hot water can be discharged to the second floor etc. by operating the circulation pump, the convenience is improved.
[0014]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the prior art and each embodiment, the same reference numerals are given to components having the same configuration and the same operation, and the detailed description will be omitted.
[0015]
Example 1
FIG. 1 is a block diagram of a hot water storage type electric water heater according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a hot water storage tank, and water of a water supply pipe 2 is supplied with water from the lower part, and hot water is discharged from the upper part through the hot water discharge pipe 3. A heater 4 is provided at the top of the water storage tank 1. A circulation pump 5 circulates the hot and cold water of the hot water storage tank 1 at the top of the heater 4 to a position near the lowermost part of the hot water storage tank 1. A bath heat exchanger 6 is provided in the circulation circuit of the circulation pump 5 so that the hot and cold water extracted from the top of the hot water storage tank 1 and the hot and cold water of the bath 7 exchange heat. A bath pump 8 circulates the hot and cold water of the bath 7 to the bath heat exchanger 6.
[0016]
Next, the operation of the first embodiment configured as described above will be described. The operation of boiling the entire hot water storage tank from the water supplied to the hot water storage tank 1 first to hot water will be described.
[0017]
The heater 4 is energized, the hot water in the hot water storage tank 1 in the upper part is boiled from the installation position of the heater 4, and the hot water is circulated by the circulation pump 5 to the lower part of the hot water storage tank 1. While repeating this operation, all the hot and cold water in the hot water storage tank 1 is boiled. In addition, at the time of running out of water or at the time of reheating, the heater 4 is energized in a state where the circulation pump 5 is stopped, and the hot water at the upper part of the heater 4 is boiled and used for hot water supply.
[0018]
Next, I will describe the follow-up operation of the bath. The hot and cold water of the bathtub 7 flows into the bath heat exchanger 6 by the operation of the bath pump 8. On the other hand, the high temperature water at the upper part of the hot water storage tank 1 flows through the circulation circuit of the bath heat exchanger 6 by the operation of the circulation pump 5, and heats the water of the bath 7 here. Then, the temperature of the water in the bath 7 rises to a high temperature, and the water flows out of the bath heat exchanger 6 and returns to the bath 7. On the other hand, the hot and cold water of the circulation circuit whose temperature is lowered by heat dissipation flows from the bath heat exchanger 6 to the lower part of the hot water storage tank 1. Therefore, the hot water supply reserving function, the entire storage tank boiling function and the bath reworking function can be realized by a simple device with one heater without providing parts such as the on-off valve in the water circuit. In addition, since it can be heated by a heater that boil the hot water storage tank at midnight, when heating after bathing, speed heating is possible.
[0019]
(Example 2)
FIG. 2 is a block diagram of a hot water storage type electric water heater according to a second embodiment of the present invention. In FIG. 2, reference numeral 9 denotes flow path switching means, which is provided downstream of the circulation pump 5 and the bath heat exchanger 6 and which flows to the vicinity of the middle of the capacity of the circulation circuit A 10 flowing to the lower part of the hot water tank 1 and the hot water tank 1 Switch to B11. Reference numeral 12 denotes a control means, which performs an operation of boiling the storage water tank with a small amount of hot water, or detects a signal from a manual switch 13 which performs a bath follow-up operation, and switches the flow path switching means 9 to the circulation circuit B11. Switch to
[0020]
Next, the operation of the second embodiment configured as described above will be described. In the case of a boiling operation on a day when the hot water supply load is small or a season when the hot water supply load is small such as summer, the signal from the manual switch 13 is detected and the control means 12 switches the flow path switching means 9 to the circulation circuit B11 side. Then, the hot water flowing out from the upper part of the hot water storage tank 1 is operated by the circulation circuit B11 for returning the hot water flowing out to the vicinity of the middle of the capacity of the hot water storage tank 1, and the upper half of the capacity of the hot water storage tank 1 is boiled while repeating this cycle. Next, in the case of performing the after-bath operation, the signal from the manual switch 13 is detected, and the flow path switching unit 9 is switched to the circulation circuit B11 side. Then, the hot water flowing out from the upper portion of the hot water storage tank 1 flows to the bath heat exchanger 6 and is radiated to the hot water of the bath 7. The hot and cold water of the circulation circuit which has dissipated heat returns to the vicinity of the middle of the capacity of the hot water storage tank 1 and is heated again by the heater 4. Therefore, in order to change the amount of hot water to be boiled according to the hot water supply load, the heat radiation loss from the hot water storage tank is small, and energy saving is achieved. In addition, shorten the heating circulation cycle at the time of bath reheating and shorten the reheating time.
[0021]
(Example 3)
FIG. 3 is a block diagram of a hot water storage type electric water heater according to a third embodiment of the present invention. In FIG. 3, 14 is a temperature detection means, and detects the hot water temperature of the hot water storage tank 1 of the connection port vicinity which flows in into the hot water storage tank 1 from the circulation circuit B11. The control means 15 detects the operation start signal 16 and controls the hot water to flow from the flow path switching means 9 to the circulation circuit B 11 side, and thereafter, the signal of the temperature detection means 14 reaches a signal of a predetermined temperature At this time, the hot water is switched from the circulation circuit B11 side to the circulation circuit A10 side.
[0022]
Next, the operation of the embodiment of the above configuration will be described. Immediately after the start of the operation by the operation start signal 16, the hot water is stored in the upper part from the connection port flowing into the hot water storage tank 1 by boiling operation in the circulation circuit B11 flowing from the upper part of the hot water storage tank 1 to near the middle of the hot water storage tank 1 capacity. Then, when the stored hot water reaches a predetermined temperature, it switches to the circulation circuit A10 flowing from the upper part of the hot water storage tank 1 to the lower part of the hot water storage tank 1 and continues the boiling operation to boil the hot water of the hot water storage tank 1. Therefore, it is possible to use the hot water at any time in order to boil the entire hot water storage tank while securing a predetermined hot water amount in the upper part of the hot water storage tank.
[0023]
(Example 4)
FIG. 4 is a block diagram of a hot water storage type electric water heater according to a fourth embodiment of the present invention. In FIG. 4, reference numeral 17 denotes a temperature detection unit, which detects the temperature of the hot water storage tank 1 above the heater 4. Reference numeral 18 denotes a heat retention operation means, which is a switch for performing heat retention operation of the bathtub. A control means 19 detects the signal of the heat retention operation means 18 and switches the flow path switching means 9 to the side of the circulation circuit B11 so that hot and cold water flows. An operation control means 20 operates the circulation pump 5 when the signal of the temperature detection means 17 transmits a predetermined temperature or more.
[0024]
Next, the operation of the embodiment of the above configuration will be described.
[0025]
When the hot water temperature at the upper part of the hot water storage tank 1 reaches a predetermined temperature or more at the time of bath heat retention and reheating operation, the circulation pump 5 is operated to heat bath water with the bath heat exchanger 6. Then, the hot and cold water of the circulation circuit whose temperature is lowered by radiating heat by the bath heat exchanger 6 flows into the intermediate position of the hot water storage tank 1. Therefore, since the amount of boiling water to be boiled is halved at the time of bath heat retention and reheating operation, the temperature rise is doubled, and speed heating can be performed.
[0026]
(Example 5)
FIG. 5 is a block diagram of a hot water storage type electric water heater according to a fifth embodiment of the present invention. In FIG. 5, reference numeral 21 denotes temperature detection means, which detects the temperature of the hot water storage tank 1 above the heater 4. A bath temperature detection means 22 detects the water temperature of the bath 7. Reference numeral 23 denotes a recovery operation means, which is an operation means for recovering the heat of the bath residual water after the end of bathing. A pump operation means 24 detects the recovery operation means 23 and operates the circulation pump 5. Reference numeral 25 denotes a control means, which detects the recovery operation means 23 and when the temperature signal of the temperature detection means 21 is higher than the temperature signal of the bathtub temperature detection means 22, hot water circulates in the flow path switching means 9 to the circulation circuit A10 side. Let's do it.
[0027]
Next, the operation of the embodiment of the above configuration will be described.
[0028]
The circulation pump 5 is operated at the time of a recovery operation for recovering the heat of the bath residual water after the end of bathing. Then, when the temperature of the hot water at the upper portion of the hot water storage tank 1 is higher than the temperature of the bath 7, the flow path switching means 9 is made to the circulation circuit A10 side to flow the hot water at the upper portion of the hot water storage tank 1 into the lower portion of the hot water storage tank. As a result, the low temperature water supplied close to almost all of the hot water storage tank 1 and a small amount of high temperature residual hot water in the upper part of the hot water storage tank 1 are mixed, and the high temperature hot water in the upper part of the hot water storage tank 1 is lowered in temperature and lower than the temperature of the bath 7 It becomes. Therefore, even when the hot water storage tank 1 has residual water and the residual water temperature at the upper part of the hot water storage tank 1 is higher than the temperature of the bath, the residual water heat after bathing can be recovered, so the power consumption of the heater It is possible to reduce the amount and save energy.
[0029]
(Example 6)
FIG. 6 is a block diagram of a hot water storage type electric water heater according to a sixth embodiment of the present invention. In FIG. 6, reference numeral 26 denotes a temperature detection means, which detects the temperature of the hot water storage tank 1 above the heater 4. Reference numeral 27 denotes a bath temperature detection means, which detects the water temperature of the bath 7. Reference numeral 28 denotes a recovery operation means, which is an operation means for recovering the heat of the bath residual water after the end of bathing. Reference numeral 29 denotes a pump operation unit, which detects the recovery operation unit 28 and operates the circulation pump 5. A control means 30 detects the signal of the recovery operation means 28 and energizes the heater 4 after the temperature signal of the temperature detection means 26 and the temperature signal of the bathtub temperature detection means 27 coincide with each other.
[0030]
Next, the operation of the embodiment of the above configuration will be described.
[0031]
The circulation pump 5 is operated in the case of a recovery operation for recovering the heat of the bath residual water after the end of bathing. Then, the hot and cold water flowing out from the upper part of the hot water storage tank 1 collects the residual hot water heat of the bath 7, raises the temperature, and flows into the hot water storage tank 1. On the other hand, the temperature of the remaining hot water of the bathtub 7 is lowered and returns to the bathtub 7. While repeating this operation, the residual heat of the bath 7 is recovered. Then, until the water temperature flowing out from the upper portion of the hot water storage tank 1 matches the water temperature of the bath 7, heat of the bath residual water is collected. Thereafter, the heater 4 is energized to boil the hot water storage tank 1. Therefore, since the heater 4 is not energized during the recovery operation, the rise in the water temperature of the hot water storage tank 1 is gentle because of the recovery heat, and the bathtub residual heat can be recovered most effectively during the bathtub recovery operation.
[0032]
(Example 7)
FIG. 7 is a block diagram of a hot water storage type electric water heater according to a seventh embodiment of the present invention. In FIG. 7, reference numeral 31 denotes operation control means, which detects an operation stop signal 32 such as a manual switch, and switches the flow path switching means 9 to the circulation circuit B11 side.
[0033]
Next, the operation of the embodiment of the above configuration will be described.
[0034]
When the hot water boiling operation of the storage tank 1 is stopped, the flow path switching means 9 is switched to the circulation circuit B11 side. Thereby, when the high temperature water in the circulation circuit outside the hot water storage tank 1 radiates heat through the piping, natural circulation from the upper part to the lower part of the hot water storage tank 1 due to the density difference is suppressed. Therefore, it is possible to suppress the heat radiation loss caused by the circulation of the high temperature water at the upper part of the hot water storage tank.
[0035]
(Example 8)
FIG. 8 is a block diagram of a hot water storage type electric water heater of an eighth embodiment of the present invention. In FIG. 8, reference numeral 33 denotes a flow path switching means, which switches to a circulation circuit A10 flowing to the lower part of the hot water storage tank 1 downstream of the circulation pump 5 and the bath heat exchanger 6 and a hot water discharge circuit 35 for discharging hot water to the terminal.
[0036]
Next, the operation of the embodiment of the above configuration will be described.
[0037]
When the hot water of the hot water storage tank 1 is drained from the terminal 34, the hot water of the upper portion of the hot water storage tank 1 passes through the hot water discharge circuit 35 via the bath heat exchanger 6, the circulation pump 5, and the flow path switching means 33 Do. Therefore, it is possible to tap the appropriate-temperature hot water whose temperature has been lowered from the terminal 34 while keeping the bath warm with hot water at the upper part of the hot water storage tank 1. In addition, since hot water can be discharged to the second floor and the like by operating the circulation pump 5, convenience is improved.
[0038]
【Effect of the invention】
As apparent from the above description, according to the present invention, the heater such as the hot water storage function, the storage tank full boiling function and the bath tracking function use one heater, and the parts such as the on-off valve in the water circuit It can be realized by a simple device without providing it. In addition, it can be heated at the time of bath reheating.
Brief Description of the Drawings
1 is a block diagram of a hot water storage type electric water heater according to a first embodiment of the present invention. FIG. 2 is a block diagram of a hot water storage type electric water heater according to a second embodiment of the present invention. 4 is a block diagram of a storage water heater according to a fourth embodiment of the present invention. FIG. 5 is a block diagram of a storage water heater according to a fifth embodiment of the present invention. The block diagram of the hot water storage type electric water heater in Example 6 of the invention [FIG. 7] The block diagram of the hot water storage type electric water heater in Example 7 of the present invention [Figure 8] The hot water storage type electric water heater in Example 8 of this invention Configuration diagram 【Fig. 9】 Configuration diagram of a conventional hot-water storage type electric water heater 【Explanation of the code】
Reference Signs List 1 hot water storage tank 4 heater 5 circulation pump 6 bath heat exchanger 9, 23 flow path switching means 10 circulation circuit A
11 Circulator B
12 control means 14, 17, 21, 26 temperature detection means 15, 19, 25, 30 control means 16 operation start signal 18 heat retention operation means 20, 31 operation control means 22, 27 bathtub temperature detection means 23, 28 recovery operation means 24 , 29 Pump operation means 32 Operation stop signal 34 Terminal 35 Outgoing hot water circuit