JP4274711B2

JP4274711B2 - Hot water storage water heater

Info

Publication number: JP4274711B2
Application number: JP2001216105A
Authority: JP
Inventors: 寿成酒井; 康人橋詰; 敏弘河内; 泰藤川; 善夫藤本; 智也崎石; 和也山口; 健一田之頭; 実希夫伊藤; 郁秀市川
Original assignee: Saibu Gas Co Ltd; Osaka Gas Co Ltd; Tokyo Gas Co Ltd; Toho Gas Co Ltd
Current assignee: Saibu Gas Co Ltd; Osaka Gas Co Ltd; Tokyo Gas Co Ltd; Toho Gas Co Ltd
Priority date: 2001-07-17
Filing date: 2001-07-17
Publication date: 2009-06-10
Anticipated expiration: 2021-07-17
Also published as: JP2003028505A

Description

【０００１】
【発明の属する技術分野】
本発明は、上部に給湯路が接続されかつ下部に給水路が接続され、温度成層を形成する状態で貯湯される貯湯タンクと、その貯湯タンクの底部から取り出した湯水を加熱手段にて加熱したのち、その湯水を前記貯湯タンクの上部に供給する形態で湯水を循環させる湯水循環手段と、給湯運転を制御する給湯制御手段とが設けられ、
前記給湯制御手段が、前記貯湯タンクから取り出した湯水を前記給湯路に供給する通常給湯状態と、前記加熱手段にて加熱された湯水を前記給湯路に供給する補助給湯状態とに切換可能に構成され、かつ、
前記貯湯タンク内の貯湯量が最低確保量より多い場合には、前記通常給湯状態に切り換え、かつ、前記貯湯タンク内の貯湯量が最低確保量より少ない場合には、前記補助給湯状態に切り換えるように構成されている貯湯式の給湯装置に関する。
【０００２】
【従来の技術】
上記のような貯湯式の給湯装置は、湯水循環手段を作動させることにより、温度成層を形成する状態で貯湯タンク内に湯水を貯湯し、給湯制御手段が、貯湯タンク内の貯湯量が最低確保量よりも多い場合には、通常給湯状態に切り換えて、貯湯タンク内に貯湯された湯水を給湯し、貯湯タンク内の貯湯量が最低確保量よりも少ない場合には、補助給湯状態に切り換え、加熱手段にて加熱された湯水を給湯するようにしているものである（例えば、特公平２−５６５７５号公報）。
【０００３】
この種の貯湯式の給湯装置は、給湯するときには、主に、通常給湯状態に切り換えて、貯湯タンクに貯湯されている湯水を給湯して、大きな給湯能力での給湯を可能としながら、貯湯タンク内の貯湯量が最低確保量よりも少なくなると、補助給湯状態に切り換えて、加熱手段にて加熱された湯水を給湯して、湯切れを防止するようにしているものである。
そして、従来の貯湯式の給湯装置では、通常給湯状態においては、貯湯タンクの機能を活用することによって、大きな給湯能力での給湯が可能であり、補助給湯状態においては、そのときの給湯能力が加熱手段の加熱能力に制限を受けることなどの理由から、通常給湯状態における通常給湯能力の方が、補助給湯状態における補助給湯能力よりも大きくなっている。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の貯湯式の給湯装置では、通常給湯状態における通常給湯能力の方が、補助給湯状態における補助給湯能力よりも大きくなるので、通常給湯状態にて給湯されている状態で、貯湯タンク内の貯湯量が最低確保量よりも少なくなるに伴って、通常給湯状態から補助給湯状態に切り換えると、給湯能力が通常給湯能力から補助給湯能力に急激に変化することになって、給湯量が急激に減少したり、または、給湯温度が急激に低下するなどの現象が生じて、使用者に不快感を与える虞があった。
【０００５】
また、補助給湯状態において、加熱手段にて加熱された湯水をそのまま給湯路に供給すると、給湯能力が補助給湯能力よりも大きくなる場合などでは、加熱手段にて加熱された湯水の一部を給湯路に供給し、残りの一部を貯湯タンクの上部に供給することによって、貯湯タンク内の貯湯量が増加することになる。
したがって、上記従来の貯湯式の給湯装置では、補助給湯状態において、貯湯タンク内の貯湯量が増加し、その貯湯量が最低確保量よりも多くなると、補助給湯状態から通常給湯状態に切り換えることになるので、給湯能力が補助給湯能力から通常給湯能力に急激に変化することになって、給湯量が急激に増加したり、または、給湯温度が急激に上がるなどの現象が生じて、使用者に不快感を与える虞がある。
【０００６】
本発明は、かかる点に着目してなされたものであり、その目的は、給湯能力の急激な変化を防止して、使用者に不快感を与えることを防止することが可能となる貯湯式の給湯装置を提供する点にある。
【０００７】
【課題を解決するための手段】
この目的を達成するために、請求項１に記載の発明によれば、上部に給湯路が接続されかつ下部に給水路が接続され、温度成層を形成する状態で貯湯される貯湯タンクと、その貯湯タンクの底部から取り出した湯水を加熱手段にて加熱したのち、その湯水を前記貯湯タンクの上部に供給する形態で湯水を循環させる湯水循環手段と、給湯運転を制御する給湯制御手段とが設けられ、
前記給湯制御手段が、前記貯湯タンクから取り出した湯水を前記給湯路に供給する通常給湯状態と、前記加熱手段にて加熱された湯水を前記給湯路に供給する補助給湯状態とに切換可能に構成され、かつ、
前記貯湯タンク内の貯湯量が最低確保量より多い場合には、前記通常給湯状態に切り換え、かつ、前記貯湯タンク内の貯湯量が最低確保量より少ない場合には、前記補助給湯状態に切り換えるように構成されている貯湯式の給湯装置において、
前記通常給湯状態における通常給湯能力の方が、前記補助給湯状態における補助給湯能力よりも大きくなるように設定され、
前記給湯制御手段が、前記通常給湯状態から前記補助給湯状態に切り換えるときには、前記通常給湯状態において、給湯能力を前記通常給湯能力から前記補助給湯能力に向けて連続的に減少させたのち、前記補助給湯状態に切り換える給湯能力調整処理を実行するように構成されている。
【０００８】
すなわち、通常給湯状態における通常給湯能力の方が、補助給湯状態における補助給湯能力よりも大きくなるように設定され、給湯制御手段が、給湯能力調整処理を実行して、通常給湯状態において、給湯能力を通常給湯能力からその通常給湯能力よりも小さい補助給湯能力に向けて連続的に減少させたのち、通常給湯状態から補助給湯状態に切り換えることが可能となるので、給湯能力を通常給湯能力から補助給湯能力に向けて徐々に変化させたのち、通常給湯状態から補助給湯状態に切り換えることが可能となって、給湯能力が通常給湯能力から補助給湯能力に急激に変化することを防止することが可能となる。
したがって、給湯能力の急激な変化を防止して、使用者に不快感を与えることを防止することが可能となる貯湯式の給湯装置を提供できるに到った。
【０００９】
請求項２に記載の発明によれば、上部に給湯路が接続されかつ下部に給水路が接続され、温度成層を形成する状態で貯湯される貯湯タンクと、その貯湯タンクの底部から取り出した湯水を加熱手段にて加熱したのち、その湯水を前記貯湯タンクの上部に供給する形態で湯水を循環させる湯水循環手段と、給湯運転を制御する給湯制御手段とが設けられ、
前記給湯制御手段が、前記貯湯タンクから取り出した湯水を前記給湯路に供給する通常給湯状態と、前記加熱手段にて加熱された湯水を前記給湯路に供給する補助給湯状態とに切換可能に構成され、かつ、
前記貯湯タンク内の貯湯量が最低確保量より多い場合には、前記通常給湯状態に切り換え、かつ、前記貯湯タンク内の貯湯量が最低確保量より少ない場合には、前記補助給湯状態に切り換えるように構成されている貯湯式の給湯装置において、
前記通常給湯状態における通常給湯能力の方が、前記補助給湯状態における補助給湯能力よりも大きくなるように設定され、
前記給湯制御手段が、前記補助給湯状態から前記通常給湯状態に切り換えるときには、前記通常給湯状態に切り換え、その通常給湯状態において、給湯能力を前記補助給湯能力から前記通常給湯能力に向けて連続的に増加させる給湯能力調整処理を実行するように構成されている。
【００１０】
すなわち、給湯制御手段が、給湯能力調整処理を実行して、補助給湯状態から通常給湯状態に切り換え、その通常給湯状態において、給湯能力を補助給湯能力からその補助給湯能力よりも大きい通常給湯能力に向けて連続的に増加させることが可能となるので、補助給湯状態から通常給湯状態に切り換えた状態で、給湯能力を補助給湯能力から通常給湯能力に向けて徐々に変化させることが可能となって、給湯能力が補助給湯能力から通常給湯能力に急激に変化することを防止することが可能となる。
したがって、給湯能力の急激な変化を防止して、使用者に不快感を与えることを防止することが可能となる貯湯式の給湯装置を提供できるに到った。
【００１１】
請求項３に記載の発明によれば、前記給湯路が、給湯能力調整用給湯路と給湯能力非調整用給湯路とに分岐され、前記給湯制御手段が、前記給湯能力調整用給湯路に給湯するときには、前記給湯能力調整処理を実行し、前記給湯能力非調整用給湯路に給湯するときには、前記通常給湯状態における給湯能力を調整することなく、前記通常給湯状態から前記補助給湯状態にまたは前記補助給湯状態から前記通常給湯状態に切り換える給湯能力非調整処理を実行するように構成されている。
【００１２】
すなわち、給湯制御手段が、給湯能力調整処理を実行すると、給湯能力の急激な変化を防止することが可能となるが、通常給湯状態において、給湯能力を通常給湯能力よりも小さい状態に制限することがあり、また、給湯制御手段が、給湯能力非調整処理を実行すると、通常給湯状態において、常に給湯能力を通常給湯能力にすることが可能となるが、給湯能力の急激な変化を生じる虞がある。
そして、給湯栓などに給湯するときには、給湯能力が通常給湯能力よりも小さい状態に制限されても、給湯能力の急激な変化を防止することに対して要求があり、浴槽などに給湯するときには、給湯能力の急激な変化が生じても、給湯能力を通常給湯能力よりも小さい状態に制限することなく、給湯能力を最大の能力にて給湯することに対して要求がある。
【００１３】
請求項３に記載の構成によれば、給湯制御手段が、給湯能力調整用給湯路にて給湯栓などに給湯するときには、給湯能力調整処理を実行し、給湯能力非調整用給湯路にて浴槽などに給湯するときには、給湯能力非調整処理を実行することが可能となるので、給湯栓などに給湯するときの要求、および、浴槽などに給湯するときの要求の夫々を満たすことが可能となり、使い勝手のよいものとなる。
【００１４】
請求項４に記載の発明によれば、前記貯湯タンク内の貯湯量が最低確保量よりも多量の最低検出貯湯量であることを検出する最低検出貯湯量検出手段が設けられ、前記給湯制御手段が、前記最低検出貯湯量検出手段による検出情報、および、その最低検出貯湯量検出タイミングから前記貯湯タンクから取り出されて給湯される貯湯タンク給湯量に基づいて、前記貯湯タンク内の貯湯量を管理するように構成されている。
【００１５】
すなわち、給湯制御手段が、最低検出貯湯量検出手段による検出情報、および、その最低検出貯湯量検出タイミングから前記貯湯タンクから取り出されて給湯される貯湯タンク給湯量に基づいて、貯湯タンク内の貯湯量が最低確保量よりも少ない場合を判別し、最低検出貯湯量検出手段による検出情報に基づいて、貯湯タンク内の貯湯量が最低確保量よりも多い場合を判別することが可能となる。
したがって、貯湯タンク内の貯湯量が最低検出貯湯量であるというひとつの状態を検出し、その最低検出貯湯量検出タイミングから貯湯タンクから取り出されて給湯される貯湯タンク給湯量を検出するだけで、貯湯タンク内の貯湯量が最低確保量よりも少ない場合および多い場合を判別することが可能となって、容易な構成にて、貯湯タンク内の貯湯量を管理することが可能となる。
【００１６】
【発明の実施の形態】
本発明にかかる貯湯式の給湯装置について図面に基づいて説明する。
〔第１実施形態〕
この貯湯式の給湯装置は、図１に示すように、温度成層を形成する状態で貯湯される貯湯タンク１、貯湯タンク１内の湯水を循環するための循環路２、循環路２を通流する湯水を加熱する加熱手段としての加熱部３、給湯運転を制御する給湯制御手段としての給湯制御部Ｈなどから構成され、循環ポンプ１８を作動させて貯湯タンク１内の湯水を循環路２にて循環しながら、加熱部３にて加熱するようにしている。
【００１７】
前記貯湯タンク１内には、その貯湯量が最低確保量よりも多量の最低検出貯湯量以上であるかを、その湯温を検出することにより検出する最低検出貯湯量検出手段としての最上部サーミスタＳ１、その貯湯量が満以上であるかを、その湯温を検出することにより検出する底部サーミスタＳ２が設けられている。
前記貯湯タンク１には、その底部から貯湯タンク１に水道水圧を用いて給水する給水路４が接続され、その上部から給湯するための給湯路５が接続され、使用された量だけの水を給水路４から貯湯タンク１に給水するように構成されている。
【００１８】
前記給湯路５には、給水路４から分岐された混合用給水路６が接続され、その接続箇所に給湯路５からの湯水と混合用給水路６からの水との混合比を調整自在なミキシングバルブ７が設けられている。
前記給水路４と混合用給水路７との分岐箇所には、給水温度を検出する給水サーミスタ８が設けられている。
【００１９】
また、給湯路５におけるミキシングバルブ７よりも上流側には、貯湯タンク１の上部から給湯路５に給湯された湯水の温度を検出する貯湯出口サーミスタ９が設けられ、給湯路５におけるミキシングバルブ７よりも下流側には、ミキシングバルブ８にて混合された湯水の温度を検出するミキシングサーミスタ１０、給湯路５の湯水の流量を調整する給湯流量調整弁１１が設けられている。
そして、給湯路５における給湯流量調整弁１１よりも下流側が、給湯能力調整用給湯路５ａと給湯能力非調整用給湯路５ｂとに分岐されている。
前記給湯能力調整用給湯路５ａには、給湯能力調整用給湯路５ａの湯水の流量を検出する調整用給湯流量センサ１２が設けられ、前記給湯能力非調整用給湯路５ｂには、上流側から、その給湯能力非調整用給湯路５ｂの湯水の流量を調整する非調整用流量調整弁１３、給湯能力非調整用給湯路５ｂの湯水の流量を検出する非調整用給湯流量センサ１４が設けられている。
【００２０】
前記給湯能力調整用給湯路５ａは、台所や洗面所などの給湯栓Ａに給湯するように構成され、前記給湯能力非調整用給湯路５ｂは、浴槽Ｂに給湯するように構成されている。
そして、給湯栓Ａに給湯するときには、給湯設定温度、貯湯出口サーミスタ９および給水サーミスタ８の検出情報などに基づいて、給湯する湯水の温度が給湯設定温度になるようにミキシングバルブ７の開度を調整して、給湯設定温度の湯水を給湯するとともに、給湯流量調整弁１１の開度を調整して、給湯栓Ａへの給湯量を調整するように構成されている。
また、浴槽Ｂに湯張りするときにも、ミキシングバルブ７の開度を調整するなどして、湯張り設定温度の湯水を浴槽に供給し、湯張り設定量の湯水を供給すると湯張りを終了するように構成されている。
給湯操作手段Ｇが、貯湯出口サーミスタ９、給水サーミスタ８、ミキシングバルブ７、および、ミキシングサーミスタ１０などにより構成されている。
【００２１】
前記循環路２と貯湯タンク１とが、循環路２を通流する湯水を貯湯タンク１内に戻す、または、貯湯タンク１内の湯水を循環路２に取り出すために、貯湯タンク１の上部と底部の合計３箇所で連通接続されている。
具体的に説明すると、貯湯タンク１の上部には、循環路２の湯水を貯湯タンク１内に供給するための貯湯路１５が給湯路５の一部を共用する状態で連通接続され、その貯湯路１５には、貯湯開閉弁１６が設けられている。
また、貯湯タンク１の底部には、循環路２の両端部が各別に接続され、貯湯タンク１内の湯水は、循環路２の一端部から取り出されて、他端部に向けて流動するように構成されている。
【００２２】
そして、循環路２には、湯水の循環方向に順に、循環路２の湯水の循環量を検出する循環流量センサ１７、循環ポンプ１８、循環路２の湯水の循環量を調整する循環流量調整バルブ１９、加熱部３、加熱部３にて加熱された湯水の温度を検出する加熱温サーミスタ２０、湯水の通流を断続する開閉弁２１が設けられている。
湯水循環手段Ｅが、循環路２、循環ポンプ１８、循環流量センサ１７、循環流量調整バルブ１９、加熱温サーミスタ２０、貯湯開閉弁１６、および、開閉弁２１などから構成されている。
【００２３】
前記加熱部３は、詳述はしないが、ヒートポンプ装置による冷媒を供給して湯水を加熱するヒートポンプ式加熱部３ａと、バーナの燃焼により湯水を加熱する補助加熱部３ｂとから構成され、循環路２の湯水の循環方向において上流側から、ヒートポンプ式加熱部３ａ、補助加熱部３ｂの順に設けられている。
そして、ヒートポンプ式加熱部３ａと補助加熱部３ｂとの間には、ヒートポンプ式加熱部３ａにて加熱された湯水の温度を検出するヒートポンプ加熱温サーミスタ２２が設けられている。
【００２４】
前記ヒートポンプ式加熱部３ａは、給湯制御部Ｈとの通信などによりヒートポンプ装置を作動させて、ヒートポンプ式加熱部３ａに冷媒を供給することによって、循環路２を通流する湯水を加熱するように構成されている。
また、補助加熱部３ｂは、循環路２を通して設定量以上の水量が供給されると、バーナの燃焼を開始し、供給される水量が設定量未満になると、バーナの燃焼を停止させ、バーナの燃焼状態において、バーナの燃焼量を調整することによって、加熱した湯水の温度を調整可能に構成されている。
【００２５】
前記給湯制御部Ｈは、図２に示すように、貯湯リモコンＲ２の指令に基づいて、湯水循環手段Ｅ、給湯操作手段Ｇ、および、加熱部３の作動を制御することによって、貯湯タンク１内に湯水を貯湯する貯湯運転、給湯栓Ａや浴槽Ｂに所望の湯水を供給する給湯運転などの夫々の運転を実行するように構成されている。
【００２６】
以下、各運転について説明を加える。
前記貯湯運転は、貯湯リモコンＲ２から貯湯要求があると、貯湯開閉弁１６を開弁させ、循環ポンプ１８を作動させて、貯湯タンク１の底部から水を循環路２に取出し、加熱部３にて加熱したのち、貯湯路１５を通して貯湯タンク１の上部に供給してするように構成されている。
【００２７】
前記貯湯運転における加熱部３の動作について説明を加えると、ヒートポンプ装置が運転中でないなど、ヒートポンプ式加熱部３ａでの加熱が可能な場合には、ヒートポンプ装置を作動させて、ヒートポンプ式加熱部３ａに冷媒を供給させ、ヒートポンプ式加熱部３ａにて循環路２の湯水を加熱させ、ヒートポンプ加熱温サーミスタ２２による検出温度が目標貯湯温度（例えば、６０℃）になるようにヒートポンプ式加熱部３ａの加熱量を調整するように構成されている。
そして、ヒートポンプ式加熱部３ａによる加熱だけでは、ヒートポンプ加熱温サーミスタ２２による検出温度が目標貯湯温度（例えば、６０℃）になるように循環路２の湯水を加熱できない場合や、ヒートポンプ式加熱部３ａでの加熱が行えない場合などには、加熱温サーミスタ２０による検出温度が目標貯湯温度（例えば、６０℃）になるように、補助加熱部３ｂによる加熱量を調整するように構成されている。
【００２８】
このようにして、加熱部３にて循環路２の湯水を貯湯設定温度に加熱して、その湯水を貯湯タンク１の上部から供給することによって、温度成層を形成する状態で、貯湯タンク１内に貯湯するように構成されている。
【００２９】
前記給湯運転は、給湯栓Ａが開操作されたり、浴槽Ｂに湯張りするための湯張り指令が指令されると、開始され、貯湯タンク１内の貯湯量が最低確保量よりも多い場合には、通常給湯状態に切り換えて、貯湯タンク１から取り出した湯水を給湯路５に供給して給湯し、貯湯タンク１内の貯湯量が最低確保量よりも少ない場合には、補助給湯状態に切り換えて、加熱部３にて加熱された湯水を給湯路５に供給して給湯するように構成されている。
そして、給湯流量調整弁１１の開度を調整することによって、通常給湯状態における通常給湯能力の方が、補助給湯状態における補助給湯能力よりも大きくなるように設定されている。
【００３０】
説明を加えると、通常給湯状態においては、貯湯タンク１内に貯湯されている湯を給湯路５に取り出して、貯湯リモコンＲ２などにて設定された給湯設定温度、貯湯出口サーミスタ９および給水サーミスタ８の検出情報に基づいて、給湯する湯水の温度が給湯設定温度になるようにミキシングバルブ７の開度を調整するとともに、ミキシングサーミスタ１０の検出情報に基づいて、その検出温度と給湯設定温度との偏差に基づいてミキシングバルブ７の開度を微調整することにより、給湯設定温度の湯水を給湯して、通常給湯能力にて給湯するように構成されている。
【００３１】
また、補助給湯状態においては、加熱部３にて加熱された湯水を貯湯路１５から給湯路５に供給して、貯湯リモコンＲ２などにて設定された給湯設定温度、貯湯出口サーミスタ９および給水サーミスタ８の検出情報に基づいて、給湯する湯水の温度が給湯設定温度になるようにミキシングバルブ７の開度を調整するとともに、ミキシングサーミスタ１０の検出情報に基づいて、その検出温度と給湯設定温度との偏差に基づいてミキシングバルブ７の開度を微調整することにより、給湯設定温度の湯水を給湯するとともに、給湯流量調整弁１１の開度を絞り、通常給湯能力よりも小さい補助給湯能力にて給湯するように構成されている。
【００３２】
ちなみに、この補助給湯状態では、循環路２を通流する湯水を補助加熱部３ｂにて加熱し、加熱温サーミスタ２０による検出温度が目標貯湯温度（例えば、６０℃）になるように、補助加熱部３ｂの加熱量を調整するようにしている。
【００３３】
また、補助給湯状態では、加熱部３にて加熱されて貯湯路１５を通流する湯水の流量の方が、要求されている給湯量よりも大きいときには、貯湯路１５の通流する湯水の一部を給湯路５に供給し、残りの一部を貯湯タンク１の上部に供給して、貯湯タンク１内に貯湯するようにしている。
【００３４】
前記給湯制御部Ｈは、上述の給湯運転において、給湯能力調整用給湯路５ａに給湯しているときに、通常給湯状態から補助給湯状態に切り換えるときには、通常給湯状態において、給湯能力を通常給湯能力から補助給湯能力に向けて連続的に減少させたのち、補助給湯状態に切り換える減少側の給湯能力調整処理を実行し、補助給湯状態から通常給湯状態に切り換えるときには、通常給湯状態に切り換え、その通常給湯状態において、給湯能力を補助給湯能力から通常給湯能力に向けて連続的に増加させる増加側の給湯能力調整処理を実行するように構成されている。
また、給湯制御部Ｈは、給湯能力非調整用給湯路５ｂに給湯する場合には、通常給湯状態における給湯能力を調整することなく、通常給湯状態から補助給湯状態にまたは補助給湯状態から通常給湯状態に切り換える給湯能力非調整処理を実行するように構成されている。
【００３５】
前記減少側の給湯能力調整処理は、通常給湯状態にて給湯しているときに、図３の（イ）に示すように、貯湯タンク１内の貯湯量が最低確保量よりも多量の最低検出貯湯量（図中Ｔ１）になると、給湯温度は給湯設定温度を維持した状態で、給湯能力が時間経過に伴って減少するように給湯流量調整弁１１の開度を調整して給湯量を調整することによって、給湯能力を通常給湯能力Ｎ１から補助給湯能力Ｎ２に向けて連続的に減少させ、貯湯タンク１内の貯湯量が最低確保量（図中Ｔ２）になると、補助給湯状態に切り換えるようにしている。
【００３６】
前記増加側の給湯能力調整処理は、補助給湯状態にて給湯しているときに、図３の（ロ）に示すように、貯湯タンク１内の貯湯量が最低検出貯湯量になってから設定時間経過（図中Ｔ３）すると、通常給湯状態に切り換え、給湯温度は給湯設定温度を維持した状態で、給湯能力が時間経過に伴って増加するように給湯流量調整弁１１の開度を調整して給湯量を調整することによって、給湯能力を補助給湯能力Ｎ２から通常給湯能力Ｎ１に向けて連続的に増加させ、最終的に給湯能力が通常給湯能力Ｎ１（図中Ｔ４）になるようにしている。
【００３７】
前記給湯能力非調整処理は、通常給湯状態にて給湯しているときに、図３の（イ）の点線で示すように、貯湯タンク１内の貯湯量が最低確保量（図中Ｔ２）になると、補助給湯状態に切り換え、通常給湯能力Ｎ１から補助給湯能力Ｎ２に変更させ、補助給湯状態にて給湯しているときに、図３の（ロ）の点線で示すように、貯湯タンク１内の貯湯量が最低検出貯湯量になってから設定時間経過（図中Ｔ３）すると、通常給湯状態に切り換え、補助給湯能力Ｎ２から通常給湯能力Ｎ１に変更させるようにしている。
【００３８】
このようにして、給湯能力調整用給湯路５ａにて給湯栓Ａに給湯するときには、給湯能力調整処理を実行して、給湯能力を通常給湯能力から補助給湯能力にまたは補助給湯能力から通常給湯能力に徐々に変化させて、給湯能力の急激な変化を防止しながら給湯し、給湯能力非調整用給湯路５ｂにて浴槽Ｂに給湯するときには、給湯能力非調整処理を実行して、通常給湯状態において、常に給湯能力を通常給湯能力として、給湯能力を最大の能力にしながら給湯するように構成されている。
【００３９】
前記給湯制御部Ｈは、調整用給湯流量センサ１２および非調整用給湯流量センサ１４による検出情報に基づいて、給湯能力調整用給湯路５ａに給湯しているのか、または、給湯能力非調整用給湯路５ｂに給湯しているのかを判別するようにしている。
そして、給湯制御部Ｈは、給湯能力調整用給湯路５ａと給湯能力非調整用給湯路５ｂとの両方に給湯しているときには、上述の減少側の給湯能力調整処理および増加側の給湯能力調整処理を実行するように構成されている。
【００４０】
前記給湯制御部Ｈは、貯湯タンク１内の貯湯量を管理しており、その貯湯タンク１内の貯湯量の管理について説明する。
最低検出貯湯量は最上部サーミスタＳ１にて検出し、その最低検出貯湯量よりも少量の最低確保量については、給水サーミスタ８、貯湯出口サーミスタ９、ミキシングサーミスタ１０、調整用給湯流量センサ１２、および、非調整用給湯流量センサ１４の検出情報から、最低検出貯湯量検出タイミングから貯湯タンク１から取り出されて給湯される貯湯タンク給湯量を求めて、その貯湯タンク給湯量と最上部サーミスタＳ１にて検出される最低検出貯湯量とから求めるようにしている。
このようにして、最上部サーミスタＳ１の検出情報と貯湯タンク給湯量から、貯湯タンク１内の貯湯量を管理するようにしている。
【００４１】
ちなみに、給水サーミスタ８の検出温度、貯湯出口サーミスタ９の検出温度、および、ミキシングサーミスタ１０の検出温度から貯湯タンク１からの湯と混合用給水路６からの水の混合比が求められ、その混合比と調整用給湯流量センサ１２の検出流量から貯湯タンク１の湯の給湯量が求められることになるので、最低検出貯湯量検出タイミングから貯湯タンク１の湯の給湯量を求めることにより、貯湯タンク給湯量が求められることになる。
【００４２】
前記給湯運転の動作について、図４のフローチャートに基づいて説明する。
まず、貯湯タンク１内の貯湯量Ｑ１が最低検出貯湯量Ｑ２未満であると、補助給湯状態に切り換え、貯湯タンク１内の貯湯量Ｑ１が最低検出貯湯量Ｑ２になってから設定時間が経過する切り換えタイミングになるまで、補助給湯状態を維持する（ステップ１〜３）。
そして、切り換えタイミングになると、補助給湯状態から通常給湯状態に切り換え（ステップ４）、給湯能力調整用給湯路５ａに給湯していると、給湯能力を補助給湯能力から通常給湯能力に向けて連続的に増加させ、最終的に給湯能力が通常給湯能力になるようにする増加側の給湯能力調整処理を実行する（ステップ５，６）。
【００４３】
貯湯タンク１内の貯湯量Ｑ１が最低検出貯湯量Ｑ２以上であると、通常給湯状態に切り換え、給湯能力調整用給湯路５ａに給湯しているときには、貯湯タンク１内の貯湯量Ｑ１が最低検出貯湯量Ｑ２未満になるまで、通常給湯状態を維持する（ステップ１，７〜９）。
そして、貯湯タンク１内の貯湯量Ｑ１が最低検出貯湯量Ｑ２未満になると、通常給湯状態を維持して、給湯能力を通常給湯能力から補助給湯能力に向けて連続的に減少させる減少側の給湯能力調整処理を実行する（ステップ９，１０）。
その後、貯湯タンク１内の貯湯量Ｑ１が最低確保量Ｑ３未満になると、通常給湯状態から補助給湯状態に切り換える（ステップ１１，１２）。
【００４４】
また、給湯能力非調整用給湯路５ｂに給湯しているときには（ステップ８）、貯湯タンク１内の貯湯量Ｑ１が最低確保量Ｑ３未満になるまで、通常給湯状態を維持し（ステップ１３）、貯湯タンク１内の貯湯量Ｑ１が最低確保量Ｑ３未満になると、補助給湯状態に切り換える（ステップ１２）。
【００４５】
ちなみに、上述の給湯運転中に、給湯栓Ａが閉操作されたり、浴槽Ｂに設定量の湯水を供給して湯張りが終了されると、加熱部３が作動中であると、その加熱部３の作動を停止させるなどの停止処理を割込みさせて、給湯を停止させるようにしている。
【００４６】
〔第２実施形態〕
この第２実施形態は、上記第１実施形態における給湯制御部Ｈにおける給湯能力調整処理についての別実施形態を示すものであり、その別実施形態を図面に基づいて説明する。
ちなみに、給湯制御部Ｈにおける給湯能力調整処理以外の構成については、上記第１実施形態と同様であるので、同符号を記すなどによって、その詳細な説明は省略する。
【００４７】
すなわち、上記第１実施形態では、給湯制御部Ｈが、減少側の給湯能力調整処理と増加側の給湯能力調整処理の両方を実行するように構成されているが、この第２実施形態では、給湯制御部Ｈが、減少側の給湯能力調整処理のみを実行するように構成されている。
【００４８】
説明を加えると、給湯運転において、給湯能力調整用給湯路５ａに給湯しているときに、上記第１実施形態と同様に、通常給湯状態から補助給湯状態に切り換えるときには、通常給湯状態において、給湯能力を通常給湯能力から補助給湯能力に向けて連続的に減少させたのち、補助給湯状態に切り換える減少側の給湯能力調整処理を実行する。
そして、給湯能力調整用給湯路５ａに給湯しているときに、貯湯タンク１内の貯湯量が最低検出貯湯量になってから設定時間経過すると、通常給湯状態に切り換え、給湯能力を補助給湯能力から通常給湯能力に切り換えるようにしている。
【００４９】
前記給湯制御部Ｈの動作について、図５のフローチャートに基づいて説明する。
なお、図５のフローチャートは、上記第１実施形態における図４のフローチャートにおけるステップ５およびステップ６を削除したものであり、その他については、上記第１実施形態における図４のフローチャートと同様である。
【００５０】
説明を加えると、貯湯タンク１内の貯湯量Ｑ１が最低検出貯湯量Ｑ２未満であると、補助給湯状態に切り換え、貯湯タンク１内の貯湯量Ｑ１が最低検出貯湯量Ｑ２になってから設定時間が経過する切り換えタイミングになるまで、補助給湯状態を維持する（ステップ１〜３）。
そして、切り換えタイミングになると、補助給湯状態から通常給湯状態に切り換え（ステップ４）、給湯能力調整用給湯路５ａに給湯していても、給湯能力非調整用給湯路５ｂに給湯していても、そのままリターンに移行する。
【００５１】
貯湯タンク１内の貯湯量Ｑ１が最低検出貯湯量Ｑ２以上である場合については、上記第１実施形態における図４のステップ７〜１３と同様であるので、その詳細な説明は省略する。
【００５２】
〔別実施形態〕
（１）上記第２実施形態では、給湯制御部Ｈが、減少側の給湯能力調整処理および増加側の給湯能力調整処理のうち、減少側の給湯能力調整処理のみを実行するように構成しているが、給湯制御部Ｈが、増加側の給湯能力調整処理のみを実行するように構成して実施することが可能である。
【００５３】
（２）上記１および２実施形態では、給湯路５が給湯能力調整用給湯路５ａと給湯能力非調整用給湯路５ｂとに分岐されているが、給湯路５を分岐させず、給湯路５にて給湯栓Ｂに給湯するように構成して実施することも可能である。
なお、この場合には、第１実施形態では、給湯制御部Ｈが、給湯するときには、常に、減少側の給湯能力調整処理および増加側の給湯能力を実行し、第２実施形態では、給湯するときには、常に、減少側の給湯能力調整処理を実行するように構成するようにしている。
【００５４】
（３）上記第１および２実施形態では、減少側の給湯能力調整処理および増加側の給湯能力調整処理において、給湯温度を維持した状態で、給湯量を連続的に変化させることによって、給湯能力を連続的に変化させるようにしているが、減少側の給湯能力調整処理および増加側の給湯能力調整処理において、給湯量を維持した状態で、ミキシングバルブ７による混合比を調整して給湯温度を連続的に変化させて、給湯能力を連続的に変化させて実施することも可能である。
【００５５】
また、給湯温度と給湯量のうち、どちらを優先させるかを選択可能な選択スイッチを設けるなどして、その選択スイッチにて給湯量が選択されると、減少側の給湯能力調整処理および増加側の給湯能力調整処理において、給湯温度を維持した状態で、給湯量を連続的に変化させることによって、給湯能力を連続的に変化させ、逆に、選択スイッチにて給湯温度が選択されると、給湯量を維持した状態で、給湯温度を連続的に変化させて、給湯能力を連続的に変化させて実施することも可能である。
すなわち、減少側の給湯能力調整処理および増加側の給湯能力調整処理において、給湯量と給湯温度のうち、どちらを維持して、どちらを変化させるかは、適宜変更が可能である。
【００５６】
（４）上記第１および２実施形態では、貯湯タンク１内の貯湯量が最低検出貯湯量になってから設定時間経過して切り換えタイミングになると、補助給湯状態から通常給湯状態に切り換えるようにしているが、例えば、貯湯タンク１内の貯湯量が最低検出貯湯量になると、補助給湯状態から通常給湯状態に切り換えるなど、切り換えタイミングの条件は、適宜変更が可能である。
【００５７】
（５）上記第１および２実施形態では、減少側の給湯能力調整処理および増加側の給湯能力調整処理において、給湯量を時間経過に伴って変化させることによって、給湯能力を連続的に変化させるようにしているが、単位時間あたりの給湯能力の変化量などは適宜変更が可能であり、給湯能力を連続的に変化させるものであればよい。
【００５８】
（６）上記第１および２実施形態では、最上部サーミスタＳ１と貯湯タンク給湯量に基づいて、貯湯タンク１内の貯湯量を管理するようにしているが、貯湯タンク１内の貯湯量がある設定量であることを、湯温を検出することにより検出するサーミスタを、貯湯タンク１内に複数設けて、それら複数のサーミスタの検出情報に基づいて、貯湯タンク１内の貯湯量を管理するようにしてもよい。
【００５９】
（７）上記第１および２実施形態では、加熱部３として、ヒートポンプ式加熱部３ａと補助加熱部３ｂを備える構成を示したが、補助加熱部３ｂのみを備えるものや、ヒートポンプ式加熱部３ａと補助加熱部３ｂに加えて、外部熱源機の排熱を利用して加熱する排熱利用式加熱部を備えるなど、各種の加熱手段が適応可能である。
【００６０】
（８）上記第１および２実施形態では、本発明にかかる貯湯式の給湯装置をヒートポンプ装置を利用した貯湯式の給湯装置を例示したが、ヒートポンプ装置を備えていないものなど、各種の貯湯式の給湯装置が適応可能である。
【図面の簡単な説明】
【図１】貯湯式の給湯装置の概略構成図
【図２】貯湯式の給湯装置の制御ブロック図
【図３】給湯能力調整処理の説明図
【図４】第１実施形態における制御動作を示すフローチャート
【図５】第２実施形態における制御動作を示すフローチャート
【符号の説明】
１貯湯タンク
３加熱手段
４給水路
５給湯路
Ｅ湯水循環手段
Ｈ給湯制御手段
Ｓ１最低検出貯湯量検出手段[0001]
BACKGROUND OF THE INVENTION
In the present invention, a hot water storage tank is connected to the upper part and a water supply path is connected to the lower part, and hot water is stored in a state of forming temperature stratification, and hot water taken out from the bottom of the hot water storage tank is heated by heating means. Then, hot water circulating means for circulating hot water in a form to supply the hot water to the upper part of the hot water storage tank, and hot water supply control means for controlling the hot water supply operation are provided,
The hot water supply control means can be switched between a normal hot water supply state in which hot water taken out from the hot water storage tank is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage. And
When the amount of hot water stored in the hot water storage tank is larger than the minimum ensured amount, it is switched to the normal hot water supply state, and when the amount of hot water stored in the hot water storage tank is less than the minimum ensured amount, it is switched to the auxiliary hot water supply state. It is related with the hot water storage type hot water supply apparatus comprised by this.
[0002]
[Prior art]
The above hot water storage type hot water supply device operates hot water circulation means to store hot water in the hot water storage tank in a state where temperature stratification is formed, and the hot water control means ensures the minimum amount of hot water in the hot water storage tank. If there is more than the amount, switch to the normal hot water supply state, hot water stored in the hot water storage tank is supplied, and if the amount of hot water stored in the hot water storage tank is less than the minimum secured amount, switch to the auxiliary hot water supply state, Hot water heated by the heating means is supplied (for example, Japanese Patent Publication No. 2-56575).
[0003]
This type of hot water storage type hot water supply device mainly switches to a normal hot water supply state when hot water is supplied, hot water stored in the hot water storage tank is supplied, and hot water storage with a large hot water supply capacity is possible. When the amount of stored hot water is less than the minimum secured amount, the hot water is heated by the heating means to switch to the auxiliary hot water supply state to prevent the hot water from running out.
In the conventional hot water storage type hot water supply device, in the normal hot water supply state, it is possible to supply hot water with a large hot water supply capacity by utilizing the function of the hot water storage tank, and in the auxiliary hot water supply state, the hot water supply capacity at that time is For reasons such as being restricted by the heating capacity of the heating means, the normal hot water supply capacity in the normal hot water supply state is larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state.
[0004]
[Problems to be solved by the invention]
However, in the conventional hot water storage type hot water supply apparatus, the normal hot water supply capacity in the normal hot water supply state is larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state. As the amount of stored hot water becomes less than the minimum required amount, when the normal hot water supply state is switched to the auxiliary hot water supply state, the hot water supply capacity changes rapidly from the normal hot water supply capacity to the auxiliary hot water supply capacity. A phenomenon such as a rapid decrease or a rapid decrease in the hot water supply temperature may cause discomfort to the user.
[0005]
In addition, when hot water heated by the heating means is supplied to the hot water supply path as it is in the auxiliary hot water supply state, when the hot water supply capacity becomes larger than the auxiliary hot water supply capacity, a part of the hot water heated by the heating means is supplied. By supplying to the road and supplying the remaining part to the upper part of the hot water storage tank, the amount of hot water stored in the hot water storage tank increases.
Therefore, in the conventional hot water storage type hot water supply apparatus, when the amount of hot water stored in the hot water storage tank increases in the auxiliary hot water supply state, and the amount of hot water storage exceeds the minimum secured amount, the auxiliary hot water supply state is switched to the normal hot water supply state. As a result, the hot water supply capacity suddenly changes from the auxiliary hot water supply capacity to the normal hot water supply capacity, and the amount of hot water supply suddenly increases or the hot water temperature rises rapidly. May cause discomfort.
[0006]
The present invention has been made paying attention to such points, and its purpose is to prevent a sudden change in the hot water supply capacity and prevent the user from feeling uncomfortable. The point is to provide a water heater.
[0007]
[Means for Solving the Problems]
In order to achieve this object, according to the first aspect of the present invention, a hot water storage tank that stores hot water in a state where a hot water supply passage is connected to the upper portion and a water supply passage is connected to the lower portion to form temperature stratification, and Hot water extracted from the bottom of the hot water storage tank is heated by the heating means, and hot water circulating means for circulating the hot water in such a form that the hot water is supplied to the upper part of the hot water storage tank and hot water supply control means for controlling the hot water supply operation are provided. And
The hot water supply control means can be switched between a normal hot water supply state in which hot water taken out from the hot water storage tank is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage. And
When the amount of hot water stored in the hot water storage tank is larger than the minimum ensured amount, it is switched to the normal hot water supply state, and when the amount of hot water stored in the hot water storage tank is less than the minimum ensured amount, it is switched to the auxiliary hot water supply state. In the hot water storage type hot water supply device configured in
The normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state,
When the hot water supply control means switches from the normal hot water supply state to the auxiliary hot water supply state, in the normal hot water supply state, the hot water supply capacity is continuously decreased from the normal hot water supply capacity to the auxiliary hot water supply capacity, and then the auxiliary A hot water supply capacity adjustment process for switching to a hot water supply state is executed.
[0008]
That is, the normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state, and the hot water supply control means executes the hot water supply capacity adjustment process, Can be switched from the normal hot water supply state to the auxiliary hot water state after continuously reducing the normal hot water supply capacity from the normal hot water supply capacity to the auxiliary hot water supply capacity smaller than the normal hot water supply capacity. After changing gradually toward the hot water supply capacity, it is possible to switch from the normal hot water supply state to the auxiliary hot water supply state, and it is possible to prevent the hot water supply capacity from suddenly changing from the normal hot water supply capacity to the auxiliary hot water supply capacity. It becomes.
Therefore, it has been possible to provide a hot water storage type hot water supply apparatus that can prevent a sudden change in the hot water supply capacity and prevent the user from feeling uncomfortable.
[0009]
According to the second aspect of the present invention, the hot water storage tank is connected with the hot water supply channel at the upper part and the water supply channel is connected at the lower part to form temperature stratification, and the hot water taken out from the bottom of the hot water storage tank. Hot water circulating means for circulating hot water in a form in which the hot water is supplied to the upper part of the hot water storage tank, and hot water supply control means for controlling the hot water supply operation are provided.
The hot water supply control means can be switched between a normal hot water supply state in which hot water taken out from the hot water storage tank is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage. And
When the amount of hot water stored in the hot water storage tank is larger than the minimum ensured amount, it is switched to the normal hot water supply state, and when the amount of hot water stored in the hot water storage tank is less than the minimum ensured amount, it is switched to the auxiliary hot water supply state. In the hot water storage type hot water supply device configured in
The normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state,
When the hot water supply control means switches from the auxiliary hot water supply state to the normal hot water supply state, the hot water supply control unit switches to the normal hot water supply state, and in the normal hot water supply state, the hot water supply capacity is continuously changed from the auxiliary hot water supply capacity to the normal hot water supply capacity. It is comprised so that the hot water supply capability adjustment process to increase may be performed.
[0010]
That is, the hot water supply control means executes the hot water supply capacity adjustment process to switch from the auxiliary hot water supply state to the normal hot water supply state, and in the normal hot water supply state, the hot water supply capacity is changed from the auxiliary hot water supply capacity to the normal hot water supply capacity larger than the auxiliary hot water supply capacity. Therefore, it is possible to gradually change the hot water supply capacity from the auxiliary hot water supply capacity to the normal hot water supply capacity in the state where the auxiliary hot water supply state is switched to the normal hot water supply state. It is possible to prevent the hot water supply capacity from changing suddenly from the auxiliary hot water supply capacity to the normal hot water supply capacity.
Therefore, it has been possible to provide a hot water storage type hot water supply apparatus that can prevent a sudden change in the hot water supply capacity and prevent the user from feeling uncomfortable.
[0011]
According to a third aspect of the present invention, the hot water supply path is branched into a hot water supply capacity adjustment hot water supply path and a hot water supply capacity non-adjustment hot water supply path, and the hot water control means supplies hot water to the hot water supply capacity adjustment hot water supply path. When performing hot water supply capacity adjustment processing, and when supplying hot water to the hot water supply capacity non-adjusting hot water supply path, without adjusting the hot water supply capacity in the normal hot water supply state, from the normal hot water supply state to the auxiliary hot water supply state or the A hot water supply capacity non-adjustment process for switching from the auxiliary hot water supply state to the normal hot water supply state is executed.
[0012]
That is, when the hot water supply control means executes the hot water supply capacity adjustment process, it is possible to prevent a rapid change in the hot water supply capacity, but in the normal hot water supply state, the hot water supply capacity is limited to a state smaller than the normal hot water supply capacity. In addition, when the hot water supply control means executes the hot water supply capacity non-adjustment process, it becomes possible to always change the hot water supply capacity to the normal hot water supply capacity in the normal hot water supply state. is there.
And when hot water is supplied to a hot water tap or the like, even if the hot water supply capacity is limited to a state smaller than the normal hot water supply capacity, there is a demand for preventing a rapid change in the hot water supply capacity. There is a demand for supplying hot water at the maximum capacity without limiting the hot water capacity to a state smaller than the normal hot water capacity even if a rapid change in the hot water capacity occurs.
[0013]
According to the configuration of the third aspect, when the hot water supply control means supplies hot water to a hot water tap or the like in the hot water supply capacity adjustment hot water passage, the hot water supply capacity adjustment process is executed, and the hot water supply capacity non-adjustment hot water supply passage in the bathtub. When hot water is supplied, it is possible to execute the hot water supply capacity non-adjustment process, so that it is possible to satisfy each of the requirements for supplying hot water to a hot water tap, etc., and for supplying hot water to a bathtub, etc. It will be easy to use.
[0014]
According to a fourth aspect of the present invention, there is provided a minimum detected hot water storage amount detecting means for detecting that the hot water storage amount in the hot water storage tank is a minimum detected hot water storage amount larger than a minimum ensured amount, and the hot water supply control means. However, the amount of hot water stored in the hot water storage tank is managed based on the detection information by the minimum detected hot water storage amount detection means and the hot water supply amount of hot water stored in the hot water tank that is taken out of the hot water storage tank from the minimum detected hot water storage amount detection timing. Is configured to do.
[0015]
That is, the hot water supply control means is based on the detection information by the minimum detected hot water storage amount detection means, and the hot water storage tank hot water supply amount that is taken out from the hot water storage tank and supplied from the minimum detected hot water storage amount detection timing. It is possible to determine a case where the amount is smaller than the minimum secured amount, and to determine a case where the amount of hot water stored in the hot water storage tank is larger than the minimum secured amount based on detection information by the minimum detected hot water storage amount detection means.
Therefore, by detecting one state that the hot water storage amount in the hot water storage tank is the minimum detected hot water storage amount, and only detecting the hot water supply amount of hot water that is taken out from the hot water tank and supplied from the minimum detected hot water storage detection timing, It is possible to determine when the amount of hot water stored in the hot water storage tank is less than or greater than the minimum secured amount, and the amount of hot water stored in the hot water storage tank can be managed with an easy configuration.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
A hot water storage type hot water supply apparatus according to the present invention will be described with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, this hot water storage type hot water supply apparatus has a hot water storage tank 1 that stores hot water in a state where temperature stratification is formed, a circulation path 2 for circulating hot water in the hot water storage tank 1, and a circulation path 2. A heating unit 3 as a heating means for heating hot water to be heated, a hot water supply control unit H as a hot water supply control means for controlling a hot water supply operation, etc., and the hot water in the hot water storage tank 1 is transferred to the circulation path 2 by operating the circulation pump 18. While being circulated, heating is performed by the heating unit 3.
[0017]
In the hot water storage tank 1, the uppermost thermistor as a minimum detected hot water storage amount detecting means for detecting whether the hot water storage amount is more than the minimum detected hot water storage amount larger than the minimum ensured amount by detecting the hot water temperature. S1 is provided with a bottom thermistor S2 for detecting whether the amount of stored hot water is full or more by detecting the temperature of the hot water.
The hot water storage tank 1 is connected to a hot water supply path 4 for supplying hot water to the hot water storage tank 1 from the bottom using tap water pressure, and is connected to a hot water supply path 5 for supplying hot water from the upper part. The hot water storage tank 1 is configured to supply water from the water supply path 4.
[0018]
The hot water supply channel 5 is connected to a mixing water supply channel 6 branched from the water supply channel 4, and the mixing ratio of the hot water from the hot water supply channel 5 and the water from the mixing water supply channel 6 can be adjusted to the connection location. A mixing valve 7 is provided.
A water supply thermistor 8 for detecting a water supply temperature is provided at a branch point between the water supply path 4 and the mixing water supply path 7.
[0019]
Further, on the upstream side of the mixing valve 7 in the hot water supply path 5, a hot water storage outlet thermistor 9 that detects the temperature of hot water supplied from the upper part of the hot water storage tank 1 to the hot water supply path 5 is provided. Further, a mixing thermistor 10 that detects the temperature of hot and cold water mixed by the mixing valve 8 and a hot water supply flow rate adjustment valve 11 that adjusts the flow rate of hot water in the hot water supply passage 5 are provided on the downstream side.
Further, the downstream side of the hot water supply passage 5 with respect to the hot water supply flow rate adjustment valve 11 is branched into a hot water supply capacity adjustment hot water supply path 5a and a hot water supply capacity non-adjustment hot water supply path 5b.
The hot water supply capacity adjustment hot water supply path 5a is provided with an adjustment hot water supply flow rate sensor 12 for detecting the flow rate of hot water in the hot water supply capacity adjustment hot water supply path 5a, and the hot water supply capacity non-adjustment hot water supply path 5b from the upstream side. A non-adjusting flow rate adjusting valve 13 for adjusting the flow rate of hot water in the hot water supply capacity non-adjusting hot water passage 5b and a non-adjusting hot water flow rate sensor 14 for detecting the flow rate of hot water in the hot water supplying capacity non-adjusting hot water path 5b are provided. ing.
[0020]
The hot water supply capacity adjustment hot water supply path 5a is configured to supply hot water to a hot water tap A such as a kitchen or a washroom, and the hot water supply capacity non-adjustment hot water supply path 5b is configured to supply hot water to the bathtub B.
When hot water is supplied to the hot water tap A, the opening of the mixing valve 7 is set so that the temperature of the hot water to be supplied becomes the hot water supply set temperature based on the hot water set temperature, the detection information of the hot water storage outlet thermistor 9 and the hot water thermistor 8 and the like. It adjusts to supply hot water at a hot water supply set temperature and adjust the opening degree of the hot water supply flow rate adjustment valve 11 to adjust the amount of hot water supplied to the hot water tap A.
In addition, when filling the bathtub B, the opening of the mixing valve 7 is adjusted, for example, to supply hot water at a hot water set temperature to the bathtub, and when hot water of a hot water set amount is supplied, the hot water is finished. Is configured to do.
The hot water supply operation means G includes a hot water storage outlet thermistor 9, a water supply thermistor 8, a mixing valve 7, a mixing thermistor 10, and the like.
[0021]
The circulation path 2 and the hot water storage tank 1 return the hot water flowing through the circulation path 2 to the hot water storage tank 1 or take out the hot water in the hot water storage tank 1 to the circulation path 2. Communication connection is made at a total of three locations at the bottom.
More specifically, a hot water storage path 15 for supplying hot water in the circulation path 2 to the hot water storage tank 1 is connected to the upper part of the hot water storage tank 1 in a state where a part of the hot water supply path 5 is shared. A hot water storage opening / closing valve 16 is provided in the passage 15.
Moreover, both ends of the circulation path 2 are separately connected to the bottom of the hot water storage tank 1 so that hot water in the hot water storage tank 1 is taken out from one end of the circulation path 2 and flows toward the other end. It is configured.
[0022]
In the circulation path 2, a circulation flow rate sensor 17 that detects the circulation amount of the hot water in the circulation path 2, a circulation pump 18, and a circulation flow rate adjustment valve that adjusts the circulation amount of the hot water in the circulation path 2. 19, the heating part 3, the heating temperature thermistor 20 which detects the temperature of the hot water heated by the heating part 3, and the on-off valve 21 which interrupts the flow of hot water are provided.
The hot water circulation means E is composed of a circulation path 2, a circulation pump 18, a circulation flow rate sensor 17, a circulation flow rate adjustment valve 19, a heating temperature thermistor 20, a hot water storage on-off valve 16, an on-off valve 21, and the like.
[0023]
Although not described in detail, the heating unit 3 includes a heat pump type heating unit 3a that heats hot water by supplying a refrigerant from a heat pump device, and an auxiliary heating unit 3b that heats the hot water by combustion of a burner. The heat pump heating unit 3a and the auxiliary heating unit 3b are provided in this order from the upstream side in the hot water circulation direction.
And between the heat pump type heating part 3a and the auxiliary heating part 3b, the heat pump heating temperature thermistor 22 which detects the temperature of the hot water heated by the heat pump type heating part 3a is provided.
[0024]
The heat pump heating unit 3a operates the heat pump device by communication with the hot water supply control unit H and the like so as to heat the hot water flowing through the circulation path 2 by supplying the refrigerant to the heat pump heating unit 3a. It is configured.
The auxiliary heating unit 3b starts combustion of the burner when the amount of water equal to or larger than the set amount is supplied through the circulation path 2, and stops combustion of the burner when the amount of supplied water becomes less than the set amount. In the combustion state, the temperature of the heated hot water is adjustable by adjusting the amount of combustion of the burner.
[0025]
As shown in FIG. 2, the hot water supply control unit H controls the operation of the hot water circulation means E, the hot water supply operation means G, and the heating unit 3 based on a command from the hot water remote controller R2 to thereby store the inside of the hot water storage tank 1. The hot water storage operation for storing hot water and the hot water supply operation for supplying desired hot water to the hot-water tap A and the bathtub B are performed.
[0026]
Hereinafter, description will be added for each operation.
In the hot water storage operation, when a hot water storage request is received from the hot water remote controller R2, the hot water opening / closing valve 16 is opened, the circulation pump 18 is operated, water is taken out from the bottom of the hot water storage tank 1 to the circulation path 2, and After heating, the hot water is supplied to the upper part of the hot water storage tank 1 through the hot water storage passage 15.
[0027]
The operation of the heating unit 3 in the hot water storage operation will be described. If the heat pump type heating unit 3a can be heated, such as when the heat pump unit is not in operation, the heat pump type heating unit 3a is operated. The heat pump type heating unit 3a heats the hot water in the circulation path 2 so that the temperature detected by the heat pump heating temperature thermistor 22 becomes the target hot water storage temperature (for example, 60 ° C.). It is comprised so that the amount of heating may be adjusted.
And only by the heating by the heat pump heating unit 3a, the hot water in the circulation path 2 cannot be heated so that the temperature detected by the heat pump heating temperature thermistor 22 becomes the target hot water storage temperature (for example, 60 ° C.), or the heat pump heating unit 3a In the case where heating cannot be performed, the amount of heating by the auxiliary heating unit 3b is adjusted so that the temperature detected by the heating temperature thermistor 20 becomes the target hot water storage temperature (for example, 60 ° C.).
[0028]
In this way, the hot water in the circulation path 2 is heated to the hot water storage set temperature by the heating unit 3 and the hot water is supplied from the upper part of the hot water storage tank 1 to form a temperature stratification in the hot water storage tank 1. It is configured to store hot water.
[0029]
The hot water supply operation is started when the hot water tap A is opened or a hot water filling command for filling the bathtub B is instructed, and when the amount of hot water stored in the hot water storage tank 1 is larger than the minimum secured amount. Is switched to the normal hot water supply state, hot water taken out from the hot water storage tank 1 is supplied to the hot water supply passage 5 to supply hot water, and if the amount of hot water stored in the hot water storage tank 1 is less than the minimum amount, it is switched to the auxiliary hot water supply state. The hot water heated by the heating unit 3 is supplied to the hot water supply path 5 to supply hot water.
The normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state by adjusting the opening degree of the hot water supply flow rate adjustment valve 11.
[0030]
More specifically, in a normal hot water supply state, hot water stored in the hot water storage tank 1 is taken out to the hot water supply passage 5 and the hot water supply set temperature, the hot water outlet thermistor 9 and the hot water thermistor 8 set by the hot water remote controller R2 or the like. On the basis of the detected information, the opening of the mixing valve 7 is adjusted so that the temperature of the hot water to be supplied becomes the set hot water temperature, and the detected temperature and the set hot water temperature are determined based on the detected information of the mixing thermistor 10. By finely adjusting the opening of the mixing valve 7 based on the deviation, hot water at a hot water supply set temperature is supplied, and hot water is supplied with a normal hot water supply capacity.
[0031]
Further, in the auxiliary hot water supply state, hot water heated by the heating unit 3 is supplied from the hot water storage path 15 to the hot water supply path 5, and the hot water supply set temperature, the hot water storage outlet thermistor 9 and the hot water supply thermistor set by the hot water storage remote controller R2 or the like. 8, the opening degree of the mixing valve 7 is adjusted so that the temperature of the hot water to be supplied becomes the hot water supply set temperature, and the detected temperature and the hot water supply set temperature are determined based on the detection information of the mixing thermistor 10. By finely adjusting the opening degree of the mixing valve 7 on the basis of the deviation of the hot water, hot water at the hot water supply set temperature is supplied, and the opening degree of the hot water supply flow rate adjustment valve 11 is narrowed down, and the auxiliary hot water supply capacity is smaller than the normal hot water supply capacity. It is configured to supply hot water.
[0032]
By the way, in this auxiliary hot water supply state, the hot water flowing through the circulation path 2 is heated by the auxiliary heating unit 3b, and the auxiliary heating is performed so that the temperature detected by the heating temperature thermistor 20 becomes the target hot water storage temperature (for example, 60 ° C.). The amount of heating of the part 3b is adjusted.
[0033]
Further, in the auxiliary hot water supply state, when the flow rate of hot water heated by the heating unit 3 and flowing through the hot water storage passage 15 is larger than the required hot water supply amount, one of hot water flowing through the hot water storage passage 15 is used. The hot water is supplied to the hot water supply channel 5 and the remaining part is supplied to the upper part of the hot water storage tank 1 to store the hot water in the hot water storage tank 1.
[0034]
When the hot water supply control unit H switches from the normal hot water supply state to the auxiliary hot water supply state while supplying hot water to the hot water supply capacity adjusting hot water supply passage 5a in the hot water supply operation described above, the normal hot water supply state is changed to the normal hot water supply capacity. Continuously from the auxiliary hot water supply capacity to the auxiliary hot water supply capacity, the reduced hot water supply capacity adjustment process is performed to switch to the auxiliary hot water supply state. In the hot water supply state, an increase-side hot water supply capacity adjustment process for continuously increasing the hot water supply capacity from the auxiliary hot water supply capacity toward the normal hot water supply capacity is executed.
When the hot water supply control unit H supplies hot water to the hot water supply capacity non-adjusting hot water supply passage 5b, the normal hot water supply state is changed from the normal hot water supply state to the auxiliary hot water supply state without adjusting the hot water supply capacity in the normal hot water supply state. It is configured to execute a hot water supply capacity non-adjustment process for switching to a state.
[0035]
When the hot water supply capacity adjustment processing on the decreasing side is hot water supply in the normal hot water supply state, as shown in FIG. 3 (a), the minimum detection amount of hot water in the hot water storage tank 1 is larger than the minimum ensured amount. When the amount of hot water stored (T1 in the figure) is reached, the hot water supply temperature is maintained at the hot water supply set temperature, and the hot water supply flow rate adjustment valve 11 is adjusted to adjust the hot water supply amount so that the hot water supply capacity decreases with time. As a result, the hot water supply capacity is continuously decreased from the normal hot water supply capacity N1 to the auxiliary hot water supply capacity N2, and when the amount of hot water stored in the hot water storage tank 1 reaches the minimum secured amount (T2 in the figure), the hot water supply capacity is switched to the auxiliary hot water supply state. I have to.
[0036]
The increased-side hot water supply capacity adjustment processing is set after the hot water storage amount in the hot water storage tank 1 reaches the minimum detected hot water storage amount as shown in FIG. When the time elapses (T3 in the figure), it switches to the normal hot water supply state, the hot water supply temperature is maintained at the hot water supply set temperature, and the opening degree of the hot water supply flow rate adjustment valve 11 is adjusted so that the hot water supply capacity increases with time. By adjusting the hot water supply amount, the hot water supply capacity is continuously increased from the auxiliary hot water supply capacity N2 toward the normal hot water supply capacity N1, and finally the hot water supply capacity becomes the normal hot water supply capacity N1 (T4 in the figure). Yes.
[0037]
In the hot water supply capacity non-adjustment process, when hot water is supplied in a normal hot water supply state, the hot water storage amount in the hot water storage tank 1 is set to the minimum secured amount (T2 in the figure) as shown by the dotted line in FIG. Then, when the hot water supply state is changed to the auxiliary hot water supply capability N2 from the normal hot water supply capability N1, and the hot water is supplied in the auxiliary hot water supply state, as shown by the dotted line in FIG. When the set amount of time (T3 in the figure) elapses after the amount of stored hot water reaches the minimum detected amount of stored hot water, the normal hot water supply state is switched to change from the auxiliary hot water supply capability N2 to the normal hot water supply capability N1.
[0038]
Thus, when hot water is supplied to the hot water tap A through the hot water supply path 5a for adjusting the hot water supply capacity, the hot water supply capacity adjustment process is executed to change the hot water supply capacity from the normal hot water supply capacity to the auxiliary hot water supply capacity or from the auxiliary hot water supply capacity to the normal hot water supply capacity. When the hot water is supplied to the bathtub B in the hot water supply passage 5b for adjusting the hot water supply capacity unadjusted, the hot water supply capacity non-adjustment process is executed to perform the normal hot water supply state. The hot water supply capacity is always the normal hot water supply capacity, and the hot water supply capacity is set to the maximum capacity.
[0039]
The hot water supply control unit H supplies hot water to the hot water supply capacity adjustment hot water supply path 5a based on detection information from the adjustment hot water supply flow rate sensor 12 and the non-adjustment hot water supply flow rate sensor 14, or hot water supply capacity non-adjustment hot water supply. It is determined whether hot water is supplied to the path 5b.
When the hot water supply control section H supplies hot water to both the hot water supply capacity adjustment hot water supply path 5a and the hot water supply capacity non-adjustment hot water supply path 5b, the above-described decrease side hot water supply capacity adjustment processing and increase side hot water supply capacity adjustment are performed. It is configured to perform processing.
[0040]
The hot water supply control unit H manages the amount of hot water stored in the hot water storage tank 1, and the management of the amount of hot water stored in the hot water storage tank 1 will be described.
The lowest detected hot water storage amount is detected by the uppermost thermistor S1, and the minimum secured amount smaller than the minimum detected hot water storage amount is a water supply thermistor 8, a hot water storage outlet thermistor 9, a mixing thermistor 10, an adjusting hot water flow rate sensor 12, and From the detection information of the non-adjusting hot water flow rate sensor 14, the hot water storage tank hot water supply amount to be taken out from the hot water storage tank 1 and supplied with hot water from the minimum detected hot water storage amount detection timing is obtained, and the hot water storage tank hot water supply amount and the uppermost thermistor S1. The minimum detected hot water storage amount to be detected is obtained.
In this manner, the hot water storage amount in the hot water storage tank 1 is managed from the detection information of the uppermost thermistor S1 and the hot water supply amount of the hot water storage tank.
[0041]
Incidentally, the mixing ratio of the hot water from the hot water storage tank 1 and the water from the mixing water supply channel 6 is obtained from the detected temperature of the water supply thermistor 8, the detected temperature of the hot water storage outlet thermistor 9, and the detected temperature of the mixing thermistor 10. Since the hot water supply amount of the hot water storage tank 1 is obtained from the ratio and the detected flow rate of the adjustment hot water supply flow rate sensor 12, the hot water storage tank is obtained by obtaining the hot water supply amount of the hot water storage tank 1 from the minimum detected hot water storage amount detection timing. The amount of hot water supply will be required.
[0042]
The operation of the hot water supply operation will be described based on the flowchart of FIG.
First, when the hot water storage amount Q1 in the hot water storage tank 1 is less than the minimum detected hot water storage amount Q2, the state is switched to the auxiliary hot water supply state, and the set time elapses after the hot water storage amount Q1 in the hot water storage tank 1 becomes the minimum detected hot water storage amount Q2. The auxiliary hot water supply state is maintained until the switching timing is reached (steps 1 to 3).
Then, at the switching timing, the auxiliary hot water supply state is switched to the normal hot water supply state (step 4), and when hot water is supplied to the hot water supply path 5a for adjusting the hot water supply capacity, the hot water supply capacity is continuously changed from the auxiliary hot water supply capacity to the normal hot water supply capacity. To increase the hot water supply capacity so that the hot water supply capacity finally becomes the normal hot water supply capacity (steps 5 and 6).
[0043]
When the hot water storage amount Q1 in the hot water storage tank 1 is equal to or greater than the minimum detected hot water storage amount Q2, the hot water storage amount Q1 in the hot water storage tank 1 is detected the lowest when the hot water supply state adjustment hot water supply path 5a is switched to the normal hot water supply state. The normal hot water supply state is maintained until the amount of stored hot water is less than Q2 (steps 1, 7 to 9).
When the hot water storage amount Q1 in the hot water storage tank 1 becomes less than the minimum detected hot water storage amount Q2, the normal hot water supply state is maintained, and the hot water supply capacity is continuously reduced from the normal hot water supply capacity to the auxiliary hot water supply capacity. A capacity adjustment process is executed (steps 9 and 10).
Thereafter, when the hot water storage amount Q1 in the hot water storage tank 1 becomes less than the minimum ensured amount Q3, the normal hot water supply state is switched to the auxiliary hot water supply state (steps 11 and 12).
[0044]
When the hot water supply capacity non-adjusting hot water supply passage 5b is being supplied (step 8), the normal hot water supply state is maintained until the hot water storage amount Q1 in the hot water storage tank 1 becomes less than the minimum secured amount Q3 (step 13), When the hot water storage amount Q1 in the hot water storage tank 1 becomes less than the minimum ensured amount Q3, the state is switched to the auxiliary hot water supply state (step 12).
[0045]
Incidentally, when the hot water tap A is closed during the hot water supply operation described above, or when the hot water filling is finished by supplying a set amount of hot water to the bathtub B, the heating unit 3 is in operation. The hot water supply is stopped by interrupting a stop process such as stopping the operation of No. 3.
[0046]
[Second Embodiment]
This 2nd Embodiment shows another embodiment about the hot water supply capability adjustment process in the hot water supply control part H in the said 1st Embodiment, The another embodiment is described based on drawing.
Incidentally, since the configuration other than the hot water supply capacity adjustment processing in the hot water supply control unit H is the same as that in the first embodiment, detailed description thereof will be omitted by using the same reference numerals.
[0047]
That is, in the first embodiment, the hot water supply control unit H is configured to execute both the decrease-side hot water supply capacity adjustment process and the increase-side hot water supply capacity adjustment process. In the second embodiment, The hot water supply control unit H is configured to execute only the reduced-side hot water supply capacity adjustment processing.
[0048]
In other words, in the hot water supply operation, when hot water is supplied to the hot water supply passage 5a for adjusting the hot water supply capacity, as in the first embodiment, when switching from the normal hot water supply state to the auxiliary hot water supply state, After the capacity is continuously decreased from the normal hot water supply capacity to the auxiliary hot water supply capacity, a decrease-side hot water supply capacity adjustment process for switching to the auxiliary hot water supply state is executed.
Then, when hot water is supplied to the hot water supply passage 5a for adjusting the hot water supply capacity, when the set amount of time has elapsed after the hot water storage amount in the hot water storage tank 1 reaches the minimum detected hot water storage amount, the hot water supply capacity is switched to the normal hot water supply state. From normal to hot water supply capacity.
[0049]
The operation of the hot water supply control unit H will be described based on the flowchart of FIG.
Note that the flowchart of FIG. 5 is obtained by deleting Step 5 and Step 6 in the flowchart of FIG. 4 in the first embodiment, and is otherwise the same as the flowchart of FIG. 4 in the first embodiment.
[0050]
In addition, if the hot water storage amount Q1 in the hot water storage tank 1 is less than the minimum detected hot water storage amount Q2, it is switched to the auxiliary hot water supply state, and the set time after the hot water storage amount Q1 in the hot water storage tank 1 becomes the minimum detected hot water storage amount Q2 The auxiliary hot water supply state is maintained until the switching timing at which elapses (steps 1-3).
At the switching timing, the auxiliary hot water supply state is switched to the normal hot water supply state (step 4), whether the hot water supply capacity adjustment hot water supply path 5a is supplied, or the hot water supply capacity non-adjustment hot water supply path 5b is supplied, Continue to return.
[0051]
The case where the hot water storage amount Q1 in the hot water storage tank 1 is equal to or greater than the minimum detected hot water storage amount Q2 is the same as Steps 7 to 13 in FIG. 4 in the first embodiment, and thus detailed description thereof is omitted.
[0052]
[Another embodiment]
(1) In the second embodiment, the hot water supply control unit H is configured to execute only the decrease-side hot water supply capacity adjustment process among the decrease-side hot water supply capacity adjustment process and the increase-side hot water supply capacity adjustment process. However, the hot water supply control unit H can be configured and implemented so as to execute only the hot water supply capacity adjustment process on the increase side.
[0053]
(2) In the first and second embodiments, the hot water supply path 5 is branched into the hot water supply capacity adjustment hot water supply path 5a and the hot water supply capacity non-adjustment hot water supply path 5b. It is also possible to configure and implement so as to supply hot water to the hot-water tap B.
In this case, in the first embodiment, when the hot water supply controller H supplies hot water, the hot water supply capacity adjustment process on the decrease side and the hot water supply capacity on the increase side are always executed, and in the second embodiment, hot water is supplied. Sometimes, it is configured to always execute the reduced-side hot water supply capacity adjustment processing.
[0054]
(3) In the first and second embodiments, in the decreasing-side hot water supply capacity adjustment process and the increasing-side hot water supply capacity adjustment process, the hot water supply capacity is continuously changed while maintaining the hot water supply temperature. However, in the decrease-side hot water supply capacity adjustment process and the increase-side hot water supply capacity adjustment process, the hot water supply temperature is adjusted by adjusting the mixing ratio by the mixing valve 7 while maintaining the hot water supply amount. It is also possible to carry out by continuously changing the hot water supply capacity continuously.
[0055]
In addition, when a hot water supply amount is selected by the selection switch, for example, by providing a selection switch that can select which one of the hot water supply temperature and the hot water supply is given priority, the hot water supply capacity adjustment process on the decrease side and the increase side In the hot water supply capacity adjustment processing, the hot water supply capacity is continuously changed while the hot water supply temperature is maintained, so that the hot water supply capacity is continuously changed, and conversely, when the hot water supply temperature is selected by the selection switch, It is also possible to carry out by continuously changing the hot water supply capacity and continuously changing the hot water supply capacity while maintaining the hot water supply amount.
That is, in the decrease-side hot water supply capacity adjustment process and the increase-side hot water supply capacity adjustment process, it is possible to appropriately change which one of the hot-water supply amount and the hot-water supply temperature is maintained and which is changed.
[0056]
(4) In the first and second embodiments, when the set amount of time has elapsed after the hot water storage amount in the hot water storage tank 1 reaches the minimum detected hot water storage amount, the auxiliary hot water supply state is switched to the normal hot water supply state. However, for example, when the amount of hot water stored in the hot water storage tank 1 reaches the minimum detected hot water storage amount, the switching timing condition can be changed as appropriate, such as switching from the auxiliary hot water supply state to the normal hot water supply state.
[0057]
(5) In the first and second embodiments, in the decrease-side hot water supply capacity adjustment process and the increase-side hot water supply capacity adjustment process, the hot water supply capacity is continuously changed by changing the amount of hot water supply with time. However, the amount of change in the hot water supply capacity per unit time can be appropriately changed as long as the hot water supply capacity is continuously changed.
[0058]
(6) In the first and second embodiments, the hot water storage amount in the hot water storage tank 1 is managed based on the uppermost thermistor S1 and the hot water supply amount of the hot water storage tank, but there is a hot water storage amount in the hot water storage tank 1. A plurality of thermistors that detect the set amount by detecting the hot water temperature are provided in the hot water storage tank 1, and the amount of hot water stored in the hot water storage tank 1 is managed based on detection information of the plurality of thermistors. It may be.
[0059]
(7) In the first and second embodiments, the heating unit 3 includes the heat pump heating unit 3a and the auxiliary heating unit 3b. However, the heating unit 3 includes only the auxiliary heating unit 3b, or the heat pump heating unit 3a. In addition to the auxiliary heating unit 3b, various heating means such as a waste heat utilization type heating unit that heats using the waste heat of the external heat source machine can be applied.
[0060]
(8) In the first and second embodiments, the hot water storage type hot water supply apparatus according to the present invention is illustrated as a hot water storage type hot water supply apparatus using a heat pump device, but various hot water storage types such as those not provided with a heat pump device. The hot water supply device is applicable.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hot water storage type hot water supply apparatus.
FIG. 2 is a control block diagram of a hot water storage type hot water supply apparatus.
FIG. 3 is an explanatory diagram of hot water supply capacity adjustment processing
FIG. 4 is a flowchart showing a control operation in the first embodiment.
FIG. 5 is a flowchart showing a control operation in the second embodiment.
[Explanation of symbols]
1 Hot water storage tank
3 Heating means
4 water supply channels
5 Hot water supply path
E Hot water circulation means
H Hot water supply control means
S1 Minimum detection hot water storage amount detection means

Claims

A hot water storage tank connected to the upper part and connected to the lower part of the hot water supply path to form hot water in a state where temperature stratification is formed,
Hot water circulating means for circulating hot water in a form in which the hot water taken out from the bottom of the hot water storage tank is heated by a heating means and then supplied to the upper part of the hot water storage tank;
A hot water supply control means for controlling the hot water supply operation,
The hot water supply control means can be switched between a normal hot water supply state in which hot water taken out from the hot water storage tank is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage. And
When the amount of hot water stored in the hot water storage tank is larger than the minimum ensured amount, it is switched to the normal hot water supply state, and when the amount of hot water stored in the hot water storage tank is less than the minimum ensured amount, it is switched to the auxiliary hot water supply state. A hot water storage type hot water supply device configured as
The normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state,
When the hot water supply control means switches from the normal hot water supply state to the auxiliary hot water supply state, in the normal hot water supply state, the hot water supply capacity is continuously decreased from the normal hot water supply capacity to the auxiliary hot water supply capacity, and then the auxiliary A hot water storage type hot water supply apparatus configured to execute a hot water supply capacity adjustment process for switching to a hot water supply state.

A hot water storage tank connected to the upper part and connected to the lower part of the hot water supply path to form hot water in a state where temperature stratification is formed,
Hot water circulating means for circulating hot water in a form in which the hot water taken out from the bottom of the hot water storage tank is heated by a heating means and then supplied to the upper part of the hot water storage tank;
A hot water supply control means for controlling the hot water supply operation,
The hot water supply control means can be switched between a normal hot water supply state in which hot water taken out from the hot water storage tank is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage. And
When the amount of hot water stored in the hot water storage tank is larger than the minimum ensured amount, it is switched to the normal hot water supply state, and when the amount of hot water stored in the hot water storage tank is less than the minimum ensured amount, it is switched to the auxiliary hot water supply state. A hot water storage type hot water supply device configured as
The normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state,
When the hot water supply control means switches from the auxiliary hot water supply state to the normal hot water supply state, the hot water supply control unit switches to the normal hot water supply state, and in the normal hot water supply state, the hot water supply capacity is continuously changed from the auxiliary hot water supply capacity to the normal hot water supply capacity. A hot water storage type hot water supply apparatus configured to execute a hot water supply capacity adjustment process to be increased.

The hot water supply path is branched into a hot water supply path for hot water supply capacity adjustment and a hot water supply path for hot water supply capacity non-adjustment,
When the hot water supply control means supplies hot water to the hot water supply capacity adjustment hot water passage, the hot water supply capacity adjustment processing is executed, and when hot water supply to the hot water supply capacity non-adjustment hot water passage adjusts the hot water supply capacity in the normal hot water supply state The hot water storage type of Claim 1 or 2 comprised so that the hot water supply capability non-adjustment process which switches from the said normal hot water supply state to the said auxiliary hot water supply state or from the said auxiliary hot water supply state to the said normal hot water supply state may be performed without Hot water supply device.

There is provided a minimum detected hot water storage amount detecting means for detecting that the hot water storage amount in the hot water storage tank is a minimum detected hot water storage amount larger than the minimum ensured amount,
In the hot water storage tank, the hot water control means is based on detection information from the minimum detected hot water storage amount detection means and a hot water tank hot water supply amount to be taken out from the hot water storage tank and supplied from the minimum detected hot water storage amount detection timing. The hot water storage type hot water supply apparatus according to any one of claims 1 to 3, wherein the hot water storage apparatus is configured to manage a hot water storage amount.