JP3930388B2

JP3930388B2 - Hot water storage hot water heater

Info

Publication number: JP3930388B2
Application number: JP2002192803A
Authority: JP
Inventors: 敏雄広川; 圭前田; 亮松尾
Original assignee: Corona Corp
Current assignee: Corona Corp
Priority date: 2002-07-02
Filing date: 2002-07-02
Publication date: 2007-06-13
Anticipated expiration: 2022-07-02
Also published as: JP2004036958A

Description

【０００１】
【発明の属する技術分野】
本発明は、給湯用の貯湯タンクに貯めた湯水を熱源として用いて暖房を行う貯湯式給湯暖房装置に関するものである。
【０００２】
【従来の技術】
従来より、この種の貯湯式給湯暖房装置においては、貯湯タンクの湯水を暖房用の熱源として用いようとしたものが幾つかあり、例えば、特許２６６３６３７号公報に開示されているようなものがあった。一方で、貯湯タンクの湯水を暖房用の熱源に用いる場合の貯湯タンクの湯水の沸き上げ動作についての先行技術はなく、暖房機能を有さない貯湯式給湯装置の沸き上げ制御として、特開平５−１１８６６０号公報に開示されているようなものがあった。
【０００３】
【発明が解決しようとする課題】
この従来の沸き上げ制御では、一週間分の消費熱量の増減と給水温度または外気温度から沸き上げ温度が決定される。しかし、このような方法を貯湯式給湯暖房装置に適応した場合、消費熱量が少なかったときや給水温度または外気温が比較的高くなったときには、沸き上げ温度が低く設定されてしまい、暖房用の熱源として用いようとすると、熱交換効率が悪く暖房能力も低くなってしまうと共に、貯湯熱量が少なくなってしまうため湯切れを生じる可能性が高かった。
【０００４】
【課題を解決するための手段】
そこで、本発明は前記課題を解決するために、請求項１では、給湯用の湯水を貯湯する貯湯タンクと、この貯湯タンク内の湯水を加熱する加熱手段と、前記加熱手段を駆動させ前記貯湯タンク内の湯水を過去数日分の消費熱量に基づいた沸き上げ温度に沸き上げる沸き上げ動作を行う沸き上げ制御部と、前記貯湯タンク内の湯水を熱源として間接的に暖房に用いる暖房回路とを備えた貯湯式給湯暖房装置において、前記沸き上げモード設定部により暖房沸き上げモードとされた状態での沸き上げ動作では、前記沸き上げ制御部は沸き上げ温度が過去数日分の消費熱量に基づいた沸き上げ温度よりも高い温度になるように沸き上げ動作を行うようにしたものである。
【０００５】
また、請求項２では、給湯用の湯水を貯湯する貯湯タンクと、この貯湯タンク内の湯水を加熱する加熱手段と、前記加熱手段を駆動させ加熱後の沸き上げ温度が所定温度範囲内の過去数日分の消費熱量に基づいた沸き上げ温度になるように前記貯湯タンク内の湯水を沸き上げる沸き上げ動作を行う沸き上げ制御部と、前記貯湯タンク内の湯水を熱源として間接的に暖房に用いる暖房回路とを備えた貯湯式給湯暖房装置において、前記沸き上げ制御部を暖房沸き上げモードに設定する暖房沸き上げモード設定部を設け、暖房沸き上げモード設定部により暖房沸き上げモードとされた状態での沸き上げ動作では、前記沸き上げ制御部は沸き上げ温度が前記過去数日分の消費熱量に基づいた沸き上げ温度より一定温度高い温度になるように沸き上げ動作を行うようにしたものである。
【０００６】
また、請求項３では、給湯用の湯水を貯湯する貯湯タンクと、この貯湯タンク内の湯水を加熱する加熱手段と、前記加熱手段を駆動させ加熱後の沸き上げ温度が所定温度範囲内の過去数日分の消費熱量に基づいた沸き上げ温度になるように前記貯湯タンク内の湯水を沸き上げる沸き上げ動作を行う沸き上げ制御部と、前記貯湯タンク内の湯水を熱源として間接的に暖房に用いる暖房回路とを備えた貯湯式給湯暖房装置において、前記沸き上げ制御部を暖房沸き上げモードに設定する暖房沸き上げモード設定部を設け、暖房沸き上げモード設定部により暖房沸き上げモードとされた状態での沸き上げ動作では、前記沸き上げ制御部は沸き上げ温度が前記所定温度範囲の最高温度になるように沸き上げ動作を行うようにしたものである。
【０００７】
また、請求項４では、給湯用の湯水を貯湯する貯湯タンクと、この貯湯タンク内の湯水を加熱する加熱手段と、前記加熱手段を駆動させ加熱後の沸き上げ温度が所定温度範囲内の過去数日分の消費熱量に基づいた沸き上げ温度になるように前記貯湯タンク内の湯水を沸き上げる沸き上げ動作を行う沸き上げ制御部と、前記貯湯タンク内の湯水を熱源として間接的に暖房に用いる暖房回路とを備えた貯湯式給湯暖房装置において、前記沸き上げ制御部を暖房沸き上げモードに設定する暖房沸き上げモード設定部を設け、暖房沸き上げモード設定部により暖房沸き上げモードとされた状態での沸き上げ動作では、前記沸き上げ制御部は沸き上げ温度が前記所定温度範囲よりも高い温度になるように沸き上げ動作を行うようにしたものである。
【０００８】
また、請求項５では、前記請求項１〜４の貯湯式給湯暖房装置において、前記暖房回路は、暖房熱交換器と、前記貯湯タンクと前記暖房熱交換器とを湯水が循環可能に接続する暖房一次循環回路と、暖房一次循環回路に設けられ前記貯湯タンクの湯水を前記暖房熱交換器に循環させて貯湯タンクに戻す暖房一次循環ポンプと、暖房熱交換器で加熱された温水により暖房を行う温水暖房端末器と、前記暖房熱交換器と温水暖房端末器とを温水が循環可能に接続する暖房二次循環回路と、暖房二次循環回路に設けられ前記暖房熱交換器と温水暖房端末器の間に温水を循環させる暖房二次循環ポンプとから構成されているものである。
【０００９】
また、請求項６では、前記請求項１〜４の貯湯式給湯暖房装置において、前記暖房回路は、前記貯湯タンクの内部に設けられた暖房熱交換器と、この暖房熱交換器で加熱された温水により暖房を行う温水暖房端末器と、前記暖房熱交換器と温水暖房端末器とを温水が循環可能に接続する暖房循環回路と、暖房循環回路に設けられ前記暖房熱交換器と温水暖房端末器の間に温水を循環させる暖房循環ポンプとから構成されているものである。
【００１０】
これらにより、暖房沸き上げモードに設定されると、暖房用の熱源となる貯湯タンク内の湯の温度が高くなるため熱交換効率が向上し、暖房能力も向上させることができると共に、貯湯熱量も多く確保することができ暖房を使用しても給湯での湯切れを生じにくくすることができる貯湯式給湯暖房装置を提供できる。
【００１１】
【発明の実施の形態】
次に、本発明の第１の実施形態について図１に基づいて説明する。
１は貯湯タンクユニット、２は加熱手段として水を加熱するヒーポンユニット、３は給湯栓、４は浴室温水暖房乾燥器や床暖房端末等の温水暖房端末器で、これらによって給湯および暖房を行うものである。
【００１２】
貯湯タンクユニット１は下部に給水管５が接続され上部に出湯管６が接続された貯湯タンク７を有しているものである。８は給湯栓３に接続される給湯管で、給水管５から分岐されたバイパス管９を通過する冷水と出湯管６からの高温の湯とがミキシング弁１０にて適温に調節されて給湯されるものである。また、１１は給水管５に設けられ給水の温度を検出する給水温度センサ、１２は前記貯湯タンク７内の湯水の熱膨張等による過圧を逃す逃し弁である。そして、これらが給湯回路１３を構成しているものである。
【００１３】
また、前記貯湯タンク７には貯湯熱量を検出するための貯湯温度センサ１４がタンク上下方向に複数個設けられ、所定温度以上を検出することで温度センサが設けられた位置まで貯湯されていることを検出することができると共に、一日の温度変化を監視して消費熱量を算出するために用いるものである。
【００１４】
この貯湯タンクユニット１と前記ヒーポンユニット２は加熱循環回路１５にて循環可能に接続され、貯湯タンク７の下部からの水を加熱ユニット２で加熱して貯湯タンク７の上部へ戻し、高温の湯を上部から順次積層して貯湯するものである。
【００１５】
そして、１６はリモートコントローラ１７が接続されると共に貯湯タンクユニット１内のセンサおよびアクチュエータを制御するマイクロコンピュータを有した沸き上げ制御部である。ここで、貯湯タンクユニット１の湯水の沸き上げは主に深夜時間帯に安価な深夜電力によって行われるもので、沸き上げ制御部１４は過去数日分の消費熱量の最大値から翌日に使用される消費熱量を推測し、この推測された消費熱量と貯湯タンク７の最下方に設けられた貯湯温度センサ１３で検出される貯湯温度とから所定温度範囲（例えば６５℃〜９０℃の範囲）内の任意の沸き上げ温度を設定し、翌朝の特定の時間帯に推測した熱量が沸き上がるように時間を逆算して加熱ユニット２による沸き上げを開始させるものである。
【００１６】
次に、加熱ユニット２は圧縮機１８、凝縮器としての冷媒−水熱交換器１９、減圧器としての電子膨張弁２０および蒸発器２１を順に接続して構成されるヒートポンプ回路２２と、貯湯タンク７の湯水を加熱循環回路１５を介して冷媒−水熱交換器１９へ送り、加熱された高温の湯を貯湯タンク７へ戻すための加熱循環ポンプ２３とを備えているものである。なお、ここで前記ヒートポンプ回路２２は冷媒に二酸化炭素を用いて、冷媒−水熱交換器１９側にて超臨界状態とされ、水を９０℃程度の高い温度まで加熱することが可能なものである。
【００１７】
また、２４はこの加熱ユニット２の制御を行うマイクロコンピュータを有した加熱制御部で、沸き上げ制御部１６からの指示により冷媒−水熱交換器１９の出口側の加熱循環回路１５に設けた加熱温度センサ２５で検出する湯の温度が所定温度範囲内の任意の温度になるように加熱循環ポンプ２３の回転数、圧縮機１８の駆動周波数、または電子膨張弁２０の開度のいずれかが適宜調節するものである。なお、この加熱制御部２４は沸き上げ制御部１６と有線にて通信可能に接続されており、沸き上げ制御部１６から指示された沸き上げ温度に沸き上げ、貯湯温度センサ１３にて必要熱量分沸き上げが完了したことを検出すると沸き上げ制御部１６が沸き上げ動作の停止を加熱制御部２４に指示して沸き上げ動作を終了するものである。
【００１８】
そして、給湯栓３が開かれると、貯湯タンク７の下部にに市水が流入して上部の高温の温水が出湯管６へ押し出されることで給湯される。そして給湯運転により高温の湯と冷水が入れ替わり、貯湯温度センサ１３の検出する温度が低下して貯湯タンク７の貯湯熱量が所定量以下になると、ヒートポンプ回路２２および加熱循環ポンプ２３を駆動して再度沸き上げを行うようにしている。
【００１９】
次に、２６は貯湯タンク７の上部と下部に連通した一次側暖房循環回路、２７は一次側暖房循環回路２６途中に設けられた暖房熱交換器、２８は一次側暖房循環回路２６途中に設けられた暖房一次ポンプである。２９は温水暖房端末器４と暖房熱交換器２７を循環可能に接続する二次側暖房循環回路、３０は二次側暖房循環回路２９途中に設けられた暖房二次ポンプ、３１は暖房熱交換器２７下流側の二次側暖房循環回路２９に設けられた二次温水温度センサ、３２は二次側の暖房循環液の熱膨張を吸収する膨張タンクである。これらによって暖房回路３３を構成している。また、３４はこの暖房回路３３の運転／停止を指示する暖房運転指示手段である。
【００２０】
そして、暖房運転指示手段３３から暖房運転開始の指示が出されると、暖房一次ポンプ２８および暖房二次ポンプ３０の駆動を開始し、貯湯タンク７内の高温の湯を暖房熱交換器２７へ循環させて二次側暖房循環回路２９の暖房循環液を加熱し、加熱された暖房循環液が温水暖房端末器４にて放熱して暖房が行われる。このとき、二次温水温度センサ３１の検知温度が所定の温度になるように暖房一次ポンプ２８および／または暖房二次ポンプ３０の回転数が適宜調節される。また、二次側との熱交換により温度低下した貯湯タンク７からの湯水は貯湯タンク７の下部へ戻されるものである。そして、暖房停止の指令があると、暖房一次循環ポンプ２８および暖房二次循環ポンプ３０の駆動を停止して暖房運転を終了するものである。
【００２１】
３５は前記沸き上げ制御部１６を暖房沸き上げモードに設定する暖房沸き上げモード設定部で、暖房運転指示手段３４からの入力により暖房回路３３が使用されると暖房沸き上げモードに設定し、暖房沸き上げモードに設定された沸き上げ制御部１６は深夜時間帯になると過去数日分の消費熱量の最大値から翌日に使用される消費熱量を推測し、所定温度範囲（例えば６５℃〜９０℃の範囲）内の最高温度（例えば９０℃）に沸き上げ温度を設定して翌朝の特定の時間帯に推測した熱量が沸き上がるように時間を逆算して加熱ユニット２による沸き上げを行わせるようにするもので、暖房回路３３の不使用がある一定期間（例えば一週間）継続すると暖房沸き上げモードを解除するようにしたものである。
【００２２】
このように、暖房沸き上げモードに設定されている状態では、沸き上げ制御部１６で推測された翌日の消費熱量の大小に関わらず、所定温度範囲内の最高温度で沸き上げ動作が行われるため、暖房用の熱源となる一次側暖房循環回路２６の湯の温度が高くなるため二次側暖房循環回路２９への熱交換効率が向上し、暖房能力も向上させることができると共に、貯湯タンク７の容量を最大限まで有効利用して貯湯熱量も多く確保することができるので、貯湯熱を暖房に使用しても給湯での湯切れを生じにくくすることができる貯湯式給湯暖房装置を提供できるものである。
【００２３】
また、暖房沸き上げモードが解除されれば、適切な沸き上げ温度が設定されるので、無駄な放熱をさせてしまうことがない。具体的には、消費熱量と給水温度に基づいて所定温度範囲内の任意の温度に設定され、傾向として消費熱量が多いときには沸き上げ温度が高く設定され、逆に少ないときには沸き上げ温度が低く設定され、貯湯タンク７の容量を最大限に利用することが可能で、また、給水温度が低いときには沸き上げ温度が高く設定され、逆に高いときには沸き上げ温度は低く設定されることで、給水温度が高くなると高温沸き上げの効率が低下してしまうヒートポンプ回路の性質を考慮した効率の良い沸き上げ動作を行って節電することが可能となる。
【００２４】
また、図２は本発明の他の一実施形態を示したもので、暖房熱交換器としての蛇管３６を貯湯タンク７内に直接配置して貯湯タンク７内の湯水を暖房用の熱源として用いる構成としている。また、暖房回路３３は前記暖房熱交換器としての蛇管３６と、この蛇管３６で加熱された暖房循環液により暖房を行う温水暖房端末器４と、前記蛇管３６と温水暖房端末器４とを暖房循環液が循環可能に接続する暖房循環回路３７と、暖房循環回路３７に設けられ前記蛇管３６と温水暖房端末器４の間に暖房循環液を循環させる暖房循環ポンプ３８とから構成されている。
【００２５】
そして、前記沸き上げ制御部１６は所定温度範囲内の任意の沸き上げ温度に貯湯タンク７内の湯水を沸き上げるものであり、かつ暖房沸き上げモードに設定されると、前記所定温度範囲（例えば６５℃〜９０℃）内の任意の沸き上げ温度より所定温度範囲の最高温度を上限とした一定温度高い温度（例えば任意の沸き上げ温度が７５℃であった場合はそれより１０℃高い８５℃、任意の沸き上げ温度が８５℃では９０℃となる。）に沸き上げるようにしたものである。
【００２６】
そして、前記沸き上げ制御部１６を暖房沸き上げモードに設定する暖房沸き上げモード設定部３５は、前記リモートコントローラ１７に設けられている暖房設定手段（図示せず）の入力により暖房沸き上げモードに設定し、暖房設定手段の再度の入力により暖房沸き上げモードを解除するようにしている。なお、暖房設定手段は単独で設けた専用のスイッチでも良いし、他のスイッチの特定の操作によるものでも良い。
【００２７】
このように、暖房沸き上げモードに設定されている状態では、沸き上げ制御部１６で推測された翌日の消費熱量の大小に関わらず、任意の沸き上げ温度より高い温度で沸き上げ動作が行われるため、暖房用の熱源となる貯湯タンク７内の湯の温度が高くなるため暖房循環回路３７への熱交換効率が向上し、暖房能力も向上させることができると共に、貯湯タンク７の容量を最大限まで有効利用して貯湯熱量も多く確保することができるので、貯湯熱を暖房に使用しても給湯での湯切れを生じにくくすることができる貯湯式給湯暖房装置を提供できるものである。
【００２８】
また、暖房沸き上げモードが解除されれば、適切な沸き上げ温度が設定されるので、無駄な放熱をさせてしまうことがない。具体的には、消費熱量と給水温度に基づいて所定温度範囲内の任意の温度に設定され、傾向として消費熱量が多いときには沸き上げ温度が高く設定され、逆に少ないときには沸き上げ温度が低く設定され、貯湯タンク７の容量を最大限に利用することが可能で、また、給水温度が低いときには沸き上げ温度が高く設定され、逆に高いときには沸き上げ温度は低く設定されることで、給水温度が高くなると高温沸き上げの効率が低下してしまうヒートポンプ回路２２の性質を考慮した効率の良い沸き上げ動作を行って節電することが可能となる。
【００２９】
また、さらに他の実施形態としては、前記沸き上げ制御部１６は暖房沸き上げモードに設定されると、所定温度範囲（例えば６５℃〜９０℃）より高い温度（例えば９２℃）に沸き上げるようにしたものが考えられる。この場合、所定温度範囲より高い温度は、温度センサ等のセンサ類の誤差が累積しても加熱する水が沸騰しない温度に設定されるものである。
【００３０】
これにより、暖房用の熱源となる貯湯タンク７内の湯の温度が高くなるため暖房循環回路３７への熱交換効率が向上し、暖房能力も向上させることができると共に、貯湯タンク７の容量を最大限まで有効利用して貯湯熱量も多く確保することができるので、貯湯熱を暖房に使用しても給湯での湯切れを生じにくくすることができる貯湯式給湯暖房装置を提供できるものである。
【００３１】
なお、本発明は上記の実施形態のようなヒートポンプ式ではなく、貯湯タンク内に電熱ヒータを配置した一般に電気温水器と呼称される構成としても良いものである。また、例えば先の一実施形態の暖房回路の構成に、他の実施形態の沸き上げ制御部の構成を組み合わせたり等、これまで説明してきた実施形態の各要素を組み合わせたものでもよいものである。
【００３２】
【発明の効果】
以上のように、本発明によれば、暖房沸き上げモードに設定されると、暖房用の熱源となる貯湯タンク内の湯の温度が高くなるため熱交換効率が向上し、暖房能力も向上させることができると共に、貯湯熱量も多く確保することができ暖房を使用しても給湯での湯切れを生じにくくすることができる貯湯式給湯暖房装置を提供できる。
【図面の簡単な説明】
【図１】本発明の一実施形態の概略構成図。
【図２】本発明の他の一実施形態の概略構成図。
【符号の説明】
２ヒーポンユニット（加熱手段）
４温水暖房端末器
７貯湯タンク
１６沸き上げ制御部
２６一次側暖房循環回路
２７暖房熱交換器
２８暖房一次ポンプ
２９二次側暖房循環回路
３０暖房二次ポンプ
３３暖房回路
３５暖房沸き上げモード設定部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water storage type hot water supply and heating device that performs heating using hot water stored in a hot water storage tank as a heat source.
[0002]
[Prior art]
Conventionally, in this type of hot water storage type hot water supply and heating device, there have been several devices that use hot water in a hot water storage tank as a heat source for heating, for example, as disclosed in Japanese Patent No. 2666337. It was. On the other hand, there is no prior art about the boiling operation of the hot water in the hot water storage tank when the hot water in the hot water storage tank is used as a heat source for heating. There are some as disclosed in Japanese Patent No. -118660.
[0003]
[Problems to be solved by the invention]
In this conventional boiling control, the boiling temperature is determined from the increase / decrease of the heat consumption for one week and the feed water temperature or the outside air temperature. However, when such a method is applied to a hot water storage type hot water supply and heating device, when the amount of heat consumed is small or the water supply temperature or the outside air temperature is relatively high, the boiling temperature is set low, When trying to use it as a heat source, the heat exchange efficiency is poor and the heating capacity is lowered, and the amount of stored hot water is reduced, so that there is a high possibility of running out of hot water.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a hot water storage tank for storing hot water for hot water supply, a heating means for heating the hot water in the hot water storage tank, and the hot water storage by driving the heating means. A boiling control unit for performing a boiling operation for boiling hot water in the tank to a boiling temperature based on heat consumption for the past several days, and a heating circuit for indirectly heating the hot water in the hot water storage tank as a heat source; In the hot water storage type hot water heating / air-heating device provided with the heating mode, when the heating mode is set to the heating / heating mode by the heating mode setting unit, the heating control unit sets the heating temperature to the amount of heat consumed for the past several days. The boiling operation is performed so that the temperature is higher than the boiling temperature based on the above.
[0005]
Further, in claim 2, a hot water storage tank for storing hot water for hot water supply, a heating means for heating the hot water in the hot water storage tank, and a past boiling temperature after driving the heating means within a predetermined temperature range. A boiling control unit that performs a boiling operation for boiling hot water in the hot water storage tank so as to reach a boiling temperature based on the amount of heat consumed for several days, and indirectly heated with the hot water in the hot water storage tank as a heat source In a hot water storage type hot water supply / heater device having a heating circuit to be used, a heating / boiling mode setting unit for setting the boiling control unit to a heating / boiling mode is provided, and the heating / boiling mode setting unit sets the heating / boiling mode. the boiling operation in the state, the boiling controller boiling so that the temperature boiling is that the constant temperature higher temperature than the boiling temperature based on the heat consumption of the past few days It is obtained to perform the work.
[0006]
According to a third aspect of the present invention, there is provided a hot water storage tank for storing hot water for hot water supply, a heating means for heating the hot water in the hot water storage tank, and a past temperature within a predetermined temperature range after the heating means is driven and heated. A boiling control unit that performs a boiling operation for boiling hot water in the hot water storage tank so as to reach a boiling temperature based on the amount of heat consumed for several days, and indirectly heated with the hot water in the hot water storage tank as a heat source In a hot water storage type hot water supply / heater device having a heating circuit to be used, a heating / boiling mode setting unit for setting the boiling control unit to a heating / boiling mode is provided, and the heating / boiling mode setting unit sets the heating / boiling mode. In the boiling operation in the state, the boiling control unit performs the boiling operation so that the boiling temperature becomes the maximum temperature in the predetermined temperature range.
[0007]
According to a fourth aspect of the present invention, a hot water storage tank for storing hot water for hot water supply, a heating means for heating the hot water in the hot water storage tank, and a past boiling temperature after driving the heating means within a predetermined temperature range. A boiling control unit that performs a boiling operation for boiling hot water in the hot water storage tank so as to reach a boiling temperature based on the amount of heat consumed for several days, and indirectly heated with the hot water in the hot water storage tank as a heat source In a hot water storage type hot water supply / heater device having a heating circuit to be used, a heating / boiling mode setting unit for setting the boiling control unit to a heating / boiling mode is provided, and the heating / boiling mode setting unit sets the heating / boiling mode. In the boiling operation in the state, the boiling control unit performs the boiling operation so that the boiling temperature is higher than the predetermined temperature range.
[0008]
Further, in claim 5, in the hot water storage type hot water supply and heating device according to claims 1 to 4, the heating circuit connects the heating heat exchanger, the hot water storage tank, and the heating heat exchanger so that hot water can circulate. Heating is performed by a heating primary circulation circuit, a heating primary circulation pump that is provided in the heating primary circulation circuit, circulates the hot water in the hot water storage tank to the heating heat exchanger and returns the hot water to the hot water storage tank, and hot water heated by the heating heat exchanger. A hot water heating terminal to perform, a heating secondary circulation circuit for connecting the heating heat exchanger and the hot water heating terminal so that hot water can circulate, and the heating heat exchanger and the hot water heating terminal provided in the heating secondary circulation circuit It is comprised from the heating secondary circulation pump which circulates warm water between containers.
[0009]
Further, in claim 6, in the hot water storage type hot water supply and heating device of claims 1 to 4, the heating circuit is heated by a heating heat exchanger provided in the hot water storage tank and the heating heat exchanger. A hot water heating terminal for heating with hot water, a heating circulation circuit for connecting the heating heat exchanger and the hot water heating terminal so that the hot water can circulate, and the heating heat exchanger and the hot water heating terminal provided in the heating circulation circuit It is comprised from the heating circulation pump which circulates warm water between containers.
[0010]
As a result, when the heating and heating mode is set, the temperature of hot water in the hot water storage tank, which is a heat source for heating, increases, so that heat exchange efficiency can be improved, heating capacity can be improved, and the amount of stored hot water is also increased. It is possible to provide a hot water storage type hot water supply and heating device that can ensure a large amount and can hardly cause a hot water supply to run out even when heating is used.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, a first embodiment of the present invention will be described with reference to FIG.
1 is a hot water storage tank unit, 2 is a heat-pump unit that heats water as a heating means, 3 is a hot-water tap, 4 is a hot water heating terminal such as a bath room temperature water heating dryer or a floor heating terminal, etc. It is.
[0012]
The hot water storage tank unit 1 has a hot water storage tank 7 having a water supply pipe 5 connected to the lower part and a hot water discharge pipe 6 connected to the upper part. Reference numeral 8 denotes a hot water pipe connected to the hot water tap 3, and cold water passing through the bypass pipe 9 branched from the water supply pipe 5 and hot water from the outlet pipe 6 are adjusted to an appropriate temperature by the mixing valve 10 and hot water is supplied. Is. A water supply temperature sensor 11 is provided in the water supply pipe 5 to detect the temperature of the water supply, and 12 is a relief valve for releasing overpressure due to thermal expansion of hot water in the hot water storage tank 7. These constitute the hot water supply circuit 13.
[0013]
The hot water storage tank 7 is provided with a plurality of hot water storage temperature sensors 14 for detecting the amount of stored hot water in the vertical direction of the tank, and the hot water is stored up to the position where the temperature sensor is provided by detecting a predetermined temperature or more. It is used to calculate the amount of heat consumption by monitoring the temperature change of the day.
[0014]
The hot water storage tank unit 1 and the heat pump unit 2 are connected so as to be circulated by a heating circulation circuit 15, and water from the lower part of the hot water storage tank 7 is heated by the heating unit 2 and returned to the upper part of the hot water storage tank 7. Are stacked in order from the top to store hot water.
[0015]
Reference numeral 16 denotes a boiling control unit having a microcomputer to which a remote controller 17 is connected and which controls the sensors and actuators in the hot water tank unit 1. Here, boiling of hot water in the hot water storage tank unit 1 is performed mainly by inexpensive late-night power in the midnight hours, and the boiling control unit 14 is used the next day from the maximum value of the heat consumption for the past several days. Within a predetermined temperature range (for example, a range of 65 ° C. to 90 ° C.) from the estimated heat consumption and the hot water storage temperature detected by the hot water storage temperature sensor 13 provided at the lowermost part of the hot water storage tank 7. Is set to an arbitrary boiling temperature, and the heating unit 2 starts boiling by calculating back the time so that the amount of heat estimated in the specific time zone of the next morning is boiled.
[0016]
Next, the heating unit 2 includes a compressor 18, a refrigerant-water heat exchanger 19 as a condenser, an electronic expansion valve 20 as a pressure reducer, and an evaporator 21 in that order, and a hot water storage tank. 7 is provided with a heating circulation pump 23 for sending hot water 7 to the refrigerant-water heat exchanger 19 via the heating circuit 15 and returning the heated hot water to the hot water storage tank 7. Here, the heat pump circuit 22 uses carbon dioxide as a refrigerant, is brought into a supercritical state on the refrigerant-water heat exchanger 19 side, and can heat water to a high temperature of about 90 ° C. is there.
[0017]
Reference numeral 24 denotes a heating control unit having a microcomputer for controlling the heating unit 2, and heating provided in the heating circulation circuit 15 on the outlet side of the refrigerant-water heat exchanger 19 in accordance with an instruction from the boiling control unit 16. Any one of the number of rotations of the heating circulation pump 23, the driving frequency of the compressor 18, and the opening of the electronic expansion valve 20 is appropriately adjusted so that the temperature of the hot water detected by the temperature sensor 25 becomes an arbitrary temperature within a predetermined temperature range. To adjust. The heating control unit 24 is connected to the boiling control unit 16 in a communicable manner. The heating control unit 24 is heated to the boiling temperature instructed by the boiling control unit 16, and a necessary amount of heat is stored in the hot water storage temperature sensor 13. When it is detected that the boiling has been completed, the boiling control unit 16 instructs the heating control unit 24 to stop the boiling operation and ends the boiling operation.
[0018]
When the hot water tap 3 is opened, city water flows into the lower part of the hot water storage tank 7 and hot water at the upper part is pushed out to the hot water discharge pipe 6 to supply hot water. When hot water and cold water are switched by the hot water supply operation and the temperature detected by the hot water storage temperature sensor 13 decreases and the amount of stored hot water in the hot water storage tank 7 falls below a predetermined amount, the heat pump circuit 22 and the heating circulation pump 23 are driven again. Boil up.
[0019]
Next, 26 is a primary side heating circulation circuit communicating with the upper and lower parts of the hot water storage tank 7, 27 is a heating heat exchanger provided in the middle of the primary side heating circulation circuit 26, and 28 is provided in the middle of the primary side heating circulation circuit 26. Heating primary pump. Reference numeral 29 is a secondary side heating circulation circuit that connects the hot water heating terminal 4 and the heating heat exchanger 27 in a circulating manner, 30 is a heating secondary pump provided in the middle of the secondary side heating circulation circuit 29, and 31 is heating heat exchange. A secondary hot water temperature sensor 32 provided in the secondary side heating circulation circuit 29 on the downstream side of the unit 27 is an expansion tank that absorbs the thermal expansion of the secondary side heating circulation liquid. These constitute a heating circuit 33. Reference numeral 34 denotes heating operation instruction means for instructing operation / stop of the heating circuit 33.
[0020]
When an instruction to start the heating operation is issued from the heating operation instruction means 33, the heating primary pump 28 and the heating secondary pump 30 are started to drive, and the hot water in the hot water storage tank 7 is circulated to the heating heat exchanger 27. Then, the heating circulating fluid in the secondary side heating circulation circuit 29 is heated, and the heated heating circulating fluid dissipates heat in the hot water heating terminal 4 to perform heating. At this time, the rotation speed of the heating primary pump 28 and / or the heating secondary pump 30 is adjusted as appropriate so that the temperature detected by the secondary hot water temperature sensor 31 becomes a predetermined temperature. Moreover, the hot water from the hot water storage tank 7 whose temperature has decreased due to heat exchange with the secondary side is returned to the lower part of the hot water storage tank 7. And when there is a heating stop command, the driving of the heating primary circulation pump 28 and the heating secondary circulation pump 30 is stopped to end the heating operation.
[0021]
A heating and heating mode setting unit 35 sets the heating control unit 16 to the heating and heating mode. When the heating circuit 33 is used by an input from the heating operation instruction means 34, the heating and heating mode is set to the heating and heating mode. The heating control unit 16 set in the heating mode estimates the heat consumption to be used on the next day from the maximum value of the heat consumption for the past several days in the midnight time zone, and is in a predetermined temperature range (for example, 65 ° C to 90 ° C). The heating temperature is set to the highest temperature within the range (for example, 90 ° C.), and the heating unit 2 performs the heating by calculating the time back so that the estimated amount of heat in the next morning is heated. Therefore, when the heating circuit 33 is not used for a certain period (for example, one week), the heating and boiling mode is canceled.
[0022]
Thus, in the state set to the heating / boiling mode, the heating operation is performed at the highest temperature within the predetermined temperature range regardless of the amount of heat consumed on the next day estimated by the boiling control unit 16. The temperature of the hot water in the primary side heating circulation circuit 26, which becomes a heat source for heating, increases, so that the efficiency of heat exchange with the secondary side heating circulation circuit 29 can be improved, the heating capacity can be improved, and the hot water storage tank 7 The hot water storage heat capacity can be ensured to the maximum and the hot water storage heat amount can be secured, so that it is possible to provide a hot water storage type hot water heating / heating device that makes it difficult for hot water supply to occur even when the hot water storage is used for heating. Is.
[0023]
In addition, if the heating and heating mode is canceled, an appropriate boiling temperature is set, so that wasteful heat dissipation is not caused. Specifically, it is set to an arbitrary temperature within a predetermined temperature range based on the amount of heat consumed and the feed water temperature. As a tendency, when the amount of consumed heat is large, the boiling temperature is set high, and when it is small, the boiling temperature is set low. It is possible to use the capacity of the hot water storage tank 7 to the maximum, and when the feed water temperature is low, the boiling temperature is set high, and conversely, when the feed water temperature is high, the boiling temperature is set low. As the temperature rises, it becomes possible to save power by performing an efficient boiling operation that takes into account the nature of the heat pump circuit that reduces the efficiency of high-temperature boiling.
[0024]
FIG. 2 shows another embodiment of the present invention, in which a serpentine tube 36 as a heating heat exchanger is directly arranged in the hot water storage tank 7 and the hot water in the hot water storage tank 7 is used as a heat source for heating. It is configured. The heating circuit 33 heats the snake pipe 36 serving as the heating heat exchanger, the hot water heating terminal 4 for heating with the heating circulating fluid heated by the snake pipe 36, and the snake pipe 36 and the hot water heating terminal 4. The heating circulation circuit 37 is connected so that the circulation liquid can circulate, and the heating circulation pump 38 provided in the heating circulation circuit 37 and circulates the heating circulation liquid between the serpentine pipe 36 and the hot water heating terminal 4.
[0025]
The boiling control unit 16 is for boiling hot water in the hot water storage tank 7 to an arbitrary boiling temperature within a predetermined temperature range, and when the heating boiling mode is set, the predetermined temperature range (for example, A certain temperature higher than an arbitrary boiling temperature within a predetermined temperature range (for example, when an arbitrary boiling temperature is 75 ° C., 85 ° C. higher by 10 ° C.) When the boiling temperature is 85 ° C., the boiling temperature is 90 ° C.).
[0026]
Then, the heating and heating mode setting unit 35 that sets the heating control unit 16 to the heating and heating mode is set to the heating and heating mode by an input of heating setting means (not shown) provided in the remote controller 17. The heating and heating mode is canceled by re-inputting the heating setting means. Note that the heating setting means may be a dedicated switch provided alone or by a specific operation of another switch.
[0027]
Thus, in the state set to the heating boiling mode, the boiling operation is performed at a temperature higher than an arbitrary boiling temperature regardless of the amount of heat consumed on the next day estimated by the boiling control unit 16. Therefore, the temperature of the hot water in the hot water storage tank 7 that becomes a heat source for heating is increased, so that the efficiency of heat exchange with the heating circulation circuit 37 is improved, the heating capacity can be improved, and the capacity of the hot water storage tank 7 is maximized. It is possible to provide a hot water storage type hot water supply and heating device that can prevent hot water from running out even when hot water is used for heating because it can be effectively used to the limit and a large amount of hot water is stored.
[0028]
In addition, if the heating and heating mode is canceled, an appropriate boiling temperature is set, so that wasteful heat dissipation is not caused. Specifically, it is set to an arbitrary temperature within a predetermined temperature range based on the amount of heat consumed and the feed water temperature. As a tendency, when the amount of consumed heat is large, the boiling temperature is set high, and when it is small, the boiling temperature is set low. It is possible to use the capacity of the hot water storage tank 7 to the maximum, and when the feed water temperature is low, the boiling temperature is set high, and conversely, when the feed water temperature is high, the boiling temperature is set low. When the temperature becomes higher, it becomes possible to save power by performing an efficient boiling operation in consideration of the property of the heat pump circuit 22 in which the efficiency of high-temperature boiling decreases.
[0029]
In still another embodiment, when the heating control unit 16 is set to the heating boiling mode, the boiling control unit 16 is heated to a temperature (for example, 92 ° C.) higher than a predetermined temperature range (for example, 65 ° C. to 90 ° C.). What you have considered is possible. In this case, the temperature higher than the predetermined temperature range is set to a temperature at which water to be heated does not boil even if errors of sensors such as a temperature sensor accumulate.
[0030]
Thereby, since the temperature of the hot water in the hot water storage tank 7 which becomes a heat source for heating becomes high, the heat exchange efficiency to the heating circulation circuit 37 can be improved, the heating capacity can be improved, and the capacity of the hot water storage tank 7 can be increased. It is possible to provide a hot water storage type hot water heating / heating device that can prevent hot water from running out of hot water even when hot water is used for heating because it can be used effectively to the maximum and a large amount of hot water is stored. .
[0031]
In addition, this invention is good also as a structure generally called an electric water heater which has arrange | positioned the electric heater in the hot water storage tank instead of the heat pump type | formula like said embodiment. Further, for example, the configuration of the heating circuit of the previous embodiment may be combined with the components of the embodiment described so far, such as the configuration of the boiling control unit of the other embodiment. .
[0032]
【The invention's effect】
As described above, according to the present invention, when the heating and heating mode is set, the temperature of hot water in the hot water storage tank that becomes a heat source for heating is increased, so that the heat exchange efficiency is improved and the heating capacity is also improved. In addition, it is possible to provide a hot water storage type hot water heating / heating device that can secure a large amount of hot water storage and can prevent hot water from running out of hot water even when heating is used.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.
FIG. 2 is a schematic configuration diagram of another embodiment of the present invention.
[Explanation of symbols]
2 Heaton unit (heating means)
4 Hot Water Heating Terminal 7 Hot Water Storage Tank 16 Heating Control Unit 26 Primary Heating Circulation Circuit 27 Heating Heat Exchanger 28 Heating Primary Pump 29 Secondary Heating Circulation Circuit 30 Heating Secondary Pump 33 Heating Circuit 35 Heating Heating Mode Setting Unit

Claims

A hot water storage tank for storing hot water for hot water supply, a heating means for heating the hot water in the hot water storage tank, and a heating temperature for driving the hot water in the hot water storage tank based on the heat consumption for the past several days by driving the heating means In a hot water storage hot water supply / heating device comprising a boiling control unit that performs a boiling operation and a heating circuit that indirectly uses the hot water in the hot water storage tank as a heat source, heating is performed by the boiling mode setting unit. In the boiling operation in the state of the boiling mode, the boiling control unit performs the boiling operation so that the boiling temperature is higher than the boiling temperature based on the heat consumption for the past several days. A hot water storage type hot water supply and heating device characterized by that.

A hot water storage tank for storing hot water for hot water supply, a heating means for heating the hot water in the hot water storage tank, and a heating temperature after the heating means is driven and the heating temperature after heating is reduced to the heat consumption for the past several days within a predetermined temperature range. A boiling control unit that performs a boiling operation of boiling hot water in the hot water storage tank so as to achieve a boiling temperature based on the heating temperature, and a heating circuit that indirectly uses the hot water in the hot water storage tank as a heat source for heating. In the hot water storage type hot water supply / heating device, a heating / boiling mode setting unit for setting the boiling control unit to the heating / boiling mode is provided, and in the heating operation in the state where the heating / boiling mode is set by the heating / boiling mode setting unit the boiling control unit temperature boiling is to perform the boiling operation such that said constant temperature higher temperature than the boiling temperature based on the heat consumption of the past few days Hot water storage type hot-water supply heating apparatus characterized and.

A hot water storage tank for storing hot water for hot water supply, a heating means for heating the hot water in the hot water storage tank, and a heating temperature after the heating means is driven and the heating temperature after heating is reduced to the heat consumption for the past several days within a predetermined temperature range. A boiling control unit that performs a boiling operation of boiling hot water in the hot water storage tank so as to achieve a boiling temperature based on the heating temperature, and a heating circuit that indirectly uses the hot water in the hot water storage tank as a heat source for heating. In the hot water storage type hot water supply / heating device, a heating / boiling mode setting unit for setting the boiling control unit to the heating / boiling mode is provided, and in the heating operation in the state where the heating / boiling mode is set by the heating / boiling mode setting unit The boiling control unit performs the boiling operation so that the boiling temperature becomes the maximum temperature within the predetermined temperature range.

A hot water storage tank for storing hot water for hot water supply, a heating means for heating the hot water in the hot water storage tank, and a heating temperature after the heating means is driven and the heating temperature after heating is reduced to the heat consumption for the past several days within a predetermined temperature range. A boiling control unit that performs a boiling operation of boiling hot water in the hot water storage tank so as to achieve a boiling temperature based on the heating temperature, and a heating circuit that indirectly uses the hot water in the hot water storage tank as a heat source for heating. In the hot water storage type hot water supply / heating device, a heating / boiling mode setting unit for setting the boiling control unit to the heating / boiling mode is provided, and in the heating operation in the state where the heating / boiling mode is set by the heating / boiling mode setting unit The boiling control unit performs the boiling operation so that the boiling temperature is higher than the predetermined temperature range.

The heating circuit includes a heating heat exchanger, a heating primary circulation circuit that connects the hot water storage tank and the heating heat exchanger so that hot water can circulate, and a heating primary circulation circuit provided in the heating primary circulation circuit for heating the hot water in the hot water storage tank. A heating primary circulation pump that circulates in the heat exchanger and returns to the hot water storage tank, a hot water heating terminal that performs heating with hot water heated by the heating heat exchanger, and the heating heat exchanger and the hot water heating terminal A heating secondary circulation circuit that is connected in a circulating manner, and a heating secondary circulation pump that is provided in the heating secondary circulation circuit and circulates hot water between the heating heat exchanger and the hot water heating terminal. The hot water storage type hot water supply and heating device according to claim 1, wherein

The heating circuit includes a heating heat exchanger provided in the hot water storage tank, a hot water heating terminal that performs heating with hot water heated by the heating heat exchanger, the heating heat exchanger, and the hot water heating terminal. A heating circulation circuit that connects the hot water in a circulating manner, and a heating circulation pump that is provided in the heating circulation circuit and circulates the hot water between the heating heat exchanger and the hot water heating terminal. The hot water storage type hot-water supply / heating device according to claim 1.