JP4390403B2

JP4390403B2 - Heating medium circulation type heating device

Info

Publication number: JP4390403B2
Application number: JP2001098258A
Authority: JP
Inventors: 究鈴木; 健一田之頭; 和也山口; 義隆栢原; 伸岩田; 桂嗣滝本; 博司高木; 和博松本; 康人橋詰; 敏弘河内; 泰藤川; 善夫藤本; 智也崎石
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: 2001-03-30
Filing date: 2001-03-30
Publication date: 2009-12-24
Anticipated expiration: 2021-03-30
Also published as: JP2002295900A

Description

【０００１】
【発明の属する技術分野】
本発明は、熱媒を加熱する加熱器と熱消費端末とに亘る循環路に沿って熱媒を循環させる熱媒循環手段と、前記熱媒循環手段による熱媒の循環流量と前記加熱器の加熱作動とを制御する加熱制御手段とが設けられ、前記加熱制御手段が、前記熱消費端末への熱媒供給要求があると、前記加熱器による熱媒の加熱温度が前記熱消費端末に応じた目標温度になるように前記循環流量、又は、前記加熱器の加熱量を制御し、かつ、前記熱媒供給要求がなくなると、前記加熱器の加熱作動を停止させる加熱制御を実行するように構成されている熱媒循環式加熱装置に関する。
【０００２】
【従来の技術】
上記熱媒循環式加熱装置では、従来、熱消費端末への熱媒供給要求があると、加熱器による熱媒の加熱温度が熱消費端末に応じた目標温度になるように、熱媒循環手段による熱媒の循環流量、又は、加熱器の加熱量を制御し、熱媒供給要求がなくなると、加熱器の加熱作動を停止させるとともに、熱媒循環手段による熱媒の循環を停止する加熱制御を実行するように構成されている。
【０００３】
【発明が解決しようとする課題】
このため、加熱制御の実行を終了した後の、加熱作動を停止させた加熱器に熱媒を加熱できる余熱があっても、その余熱を熱消費端末において有効活用できない欠点がある。
【０００４】
本発明は上記実情に鑑みてなされたものであって、加熱制御の実行を終了した後の、加熱作動を停止させた加熱器の余熱を熱消費端末において有効活用できるようにすることを目的とする。
【０００５】
【課題を解決するための手段】
請求項１記載の発明の特徴構成は、熱媒を加熱する加熱器と熱消費端末とに亘る循環路に沿って熱媒を循環させる熱媒循環手段と、前記熱媒循環手段による熱媒の循環流量と前記加熱器の加熱作動とを制御する加熱制御手段とが設けられ、前記加熱制御手段が、前記熱消費端末への熱媒供給要求があると、前記加熱器による熱媒の加熱温度が前記熱消費端末に応じた目標温度になるように前記循環流量、又は、前記加熱器の加熱量を制御し、かつ、前記熱媒供給要求がなくなると、前記加熱器の加熱作動を停止させる加熱制御を実行するように構成されている熱媒循環式加熱装置であって、前記加熱制御手段が、前記加熱制御の実行を終了した後に、加熱作動が停止されている前記加熱器を通過した熱媒の温度が目標温度になるように、前記循環流量を制御する余熱回収用加熱制御を実行するように構成されている点にある。
【０００６】
〔作用〕
加熱制御手段が、熱消費端末への熱媒供給要求があると、加熱器による熱媒の加熱温度が熱消費端末に応じた目標温度になるように、熱媒循環手段による熱媒の循環流量、又は、加熱器の加熱量を制御し、かつ、熱媒供給要求がなくなると、加熱器の加熱作動を停止させる加熱制御を実行する。
【０００７】
そして、その加熱制御の実行を終了した後に、加熱作動が停止されている加熱器を通過した熱媒の温度が加熱器の余熱で目標温度になるように、熱媒循環手段による熱媒の循環流量を制御する余熱回収用加熱制御を実行する。
【０００８】
〔効果〕
加熱作動を停止させた加熱器の余熱で目標温度に加熱した熱媒を、加熱器と熱消費端末とに亘る循環路に沿って循環させることができるので、加熱制御の実行を終了した後の加熱器の余熱を熱消費端末において有効活用できる。
【０００９】
請求項２記載の発明の特徴構成は、前記熱消費端末が、給湯路が上部に接続された貯湯タンクで構成され、前記加熱制御手段が、前記貯湯タンク内への貯湯要求があると、前記加熱器による熱媒の加熱温度が貯湯用目標温度になるように前記循環流量を制御し、かつ、前記貯湯要求がなくなると、前記加熱器の加熱作動を停止させる貯湯用加熱制御を実行するとともに、前記貯湯用加熱制御の実行を終了した後に、加熱作動が停止されている前記加熱器を通過した熱媒の温度が貯湯用目標温度になるように前記循環流量を制御して前記貯湯タンク内に貯湯する余熱回収用加熱制御を実行するように構成されている点にある。
【００１０】
〔作用〕
加熱制御手段が、貯湯タンク内への貯湯要求があると、加熱器による熱媒の加熱温度が貯湯用目標温度になるように循環流量を制御し、かつ、貯湯要求がなくなると、加熱器の加熱作動を停止させる貯湯用加熱制御を実行する。
【００１１】
そして、貯湯用加熱制御の実行を終了した後に、加熱作動が停止されている加熱器を通過した熱媒の温度が加熱器の余熱で貯湯用目標温度になるように循環流量を制御して貯湯タンク内に貯湯する余熱回収用加熱制御を実行する。
【００１２】
〔効果〕
加熱器の余熱で貯湯用目標温度に加熱した熱媒を、加熱器と貯湯タンクとに亘る循環路に沿って循環させることができるので、貯湯用加熱制御の実行を終了した後の加熱器の余熱を貯湯用に有効活用できる。
【００１３】
請求項３記載の発明の特徴構成は、前記熱消費端末が、前記循環路に互いに並列に設けた暖房用端末と、給湯路が上部に接続された貯湯タンクとで構成され、前記熱媒循環手段が、前記貯湯タンク内に貯湯されるように熱媒を循環させる貯湯運転状態と、前記加熱器にて加熱した熱媒を前記暖房用端末に供給する形態で熱媒を循環させる暖房運転状態とに切り換え自在に構成され、前記加熱制御手段が、前記暖房用端末への熱媒供給要求があると、前記熱媒循環手段を前記暖房運転状態に切り換えて、前記加熱器による熱媒の加熱温度が暖房用目標温度になるように前記循環流量を制御し、かつ、前記熱媒供給要求がなくなると、前記加熱器の加熱作動を停止させる暖房用加熱制御を実行するとともに、前記暖房用加熱制御の実行を終了した後に、前記熱媒循環手段を前記貯湯運転状態に切り換えて、加熱作動が停止されている前記加熱器を通過した熱媒の温度が貯湯用目標温度になるように前記循環流量を制御して前記貯湯タンク内に貯湯する余熱回収用加熱制御を実行するように構成されている点にある。
【００１４】
〔作用〕
加熱制御手段が、暖房用端末への熱媒供給要求があると、熱媒循環手段を暖房運転状態に切り換えて、加熱器による熱媒の加熱温度が暖房用目標温度になるように循環流量を制御し、かつ、熱媒供給要求がなくなると、加熱器の加熱作動を停止させる暖房用加熱制御を実行する。
【００１５】
そして、暖房用加熱制御の実行を終了した後に、熱媒循環手段を貯湯運転状態に切り換えて、加熱作動が停止されている加熱器を通過した熱媒の温度が加熱器の余熱で貯湯用目標温度になるように循環流量を制御して貯湯タンク内に貯湯する余熱回収用加熱制御を実行する。
【００１６】
〔効果〕
加熱器の余熱で貯湯用目標温度に加熱した熱媒を、加熱器と貯湯タンクとに亘る循環路に沿って循環させることができるので、暖房用加熱制御の実行を終了した後の加熱器の余熱を貯湯用に有効活用できる。
【００１７】
請求項４記載の発明の特徴構成は、前記熱消費端末が、前記循環路に互いに並列に設けた暖房用端末と、給湯路が上部に接続された貯湯タンクとで構成され、前記熱媒循環手段が、前記貯湯タンク内に貯湯されるように熱媒を循環させる貯湯運転状態と、前記加熱器にて加熱した熱媒を前記暖房用端末に供給する形態で熱媒を循環させる暖房運転状態とに切り換え自在に構成され、前記加熱制御手段が、前記暖房用端末への熱媒供給要求があると、前記熱媒循環手段を前記暖房運転状態に切り換えて、前記加熱器による熱媒の加熱温度が暖房用目標温度になるように前記循環流量を制御し、かつ、前記熱媒供給要求がなくなると、前記加熱器の加熱作動を停止させる暖房用加熱制御を実行するとともに、前記暖房用加熱制御の実行を終了した後に、加熱作動が停止されている前記加熱器を通過した熱媒の温度が暖房用目標温度になるように前記循環流量を制御して前記暖房用端末に供給する余熱回収用加熱制御を実行するように構成されている点にある。
【００１８】
〔作用〕
加熱制御手段が、暖房用端末への熱媒供給要求があると、熱媒循環手段を暖房運転状態に切り換えて、加熱器による熱媒の加熱温度が暖房用目標温度になるように循環流量を制御し、かつ、熱媒供給要求がなくなると、加熱器の加熱作動を停止させる暖房用加熱制御を実行する。
【００１９】
そして、暖房用加熱制御の実行を終了した後に、加熱作動が停止されている加熱器を通過した熱媒の温度が加熱器の余熱で暖房用目標温度になるように循環流量を制御して暖房用端末に供給する余熱回収用加熱制御を実行する。
【００２０】
〔効果〕
加熱器の余熱で暖房用目標温度に加熱した熱媒を、加熱器と暖房用端末とに亘る循環路に沿って循環させることができるので、暖房用加熱制御の実行を終了した後の加熱器の余熱を暖房用に有効活用できる。
【００２１】
また、暖房用端末への熱媒供給要求は、一般に、設定暖房温度を維持するに必要な熱量が不足するようになると発生し、最小供給可能熱量が要求熱量より多い時、熱媒供給要求は間欠的に発生することになるが、熱媒供給要求がなくなった後も、加熱器の余熱を暖房用端末に供給できるので、次回の熱媒供給要求が発生するまでの時間間隔が、加熱器の余熱を暖房用端末に供給しない場合に比べて長くなり、その結果、加熱制御手段による加熱器の加熱作動の頻繁な入り切りを防止することができる。
【００２２】
ちなみに、熱媒供給要求がなくなった後に、加熱器の余熱で加熱した熱媒を暖房用端末に供給するので、暖房用端末における加熱量に多少のオーバーシュートが生じるが、その影響は無視できる程度と考えられる。
【００２３】
請求項５記載の発明の特徴構成は、前記貯湯タンク内に所定量の温水を所定時間までに貯湯する予約貯湯運転が指令されているときには、前記加熱制御手段が、前記暖房用加熱制御の実行を終了した後に、前記熱媒循環手段を前記貯湯運転状態に切り換えて、加熱作動が停止されている前記加熱器を通過した熱媒の温度が貯湯用目標温度になるように前記循環流量を制御して前記貯湯タンク内に貯湯する余熱回収用加熱制御を実行するように構成されている点にある。
【００２４】
〔作用〕
貯湯タンク内に所定量の温水を所定時間までに貯湯する予約貯湯運転が指令されているときには、加熱制御手段が、暖房用加熱制御の実行を終了した後に、熱媒循環手段を貯湯運転状態に切り換えて、加熱作動が停止されている加熱器を通過した熱媒の温度が加熱器の余熱で貯湯用目標温度になるように循環流量を制御して貯湯タンク内に貯湯する余熱回収用加熱制御を実行する。
【００２５】
〔効果〕
予約貯湯運転が指令されているときには、加熱器の余熱で貯湯用目標温度に加熱した熱媒を、加熱器と貯湯タンクとに亘る循環路に沿って循環させることができるので、暖房用加熱制御の実行を終了した後の加熱器の余熱を予約貯湯用に有効活用できる。
【００２６】
請求項６記載の発明の特徴構成は、前記熱消費端末が、暖房用端末で構成され、前記熱媒循環手段が、前記加熱器にて加熱した熱媒を前記暖房用端末に供給する形態で熱媒を循環させる暖房運転状態で熱媒を循環させるように構成され、前記加熱制御手段が、前記暖房用端末への熱媒供給要求があると、前記加熱器による熱媒の加熱温度が暖房用目標温度になるように前記循環流量を制御し、かつ、前記熱媒供給要求がなくなると、前記加熱器の加熱作動を停止させる暖房用加熱制御を実行するとともに、前記暖房用加熱制御の実行を終了した後に、加熱作動が停止されている前記加熱器を通過した熱媒の温度が暖房用目標温度になるように前記循環流量を制御して前記暖房用端末に供給する余熱回収用加熱制御を実行するように構成されている点にある。
【００２７】
〔作用〕
加熱制御手段が、暖房用端末への熱媒供給要求があると、加熱器による熱媒の加熱温度が暖房用目標温度になるように循環流量を制御し、かつ、熱媒供給要求がなくなると、加熱器の加熱作動を停止させる暖房用加熱制御を実行する。
【００２８】
そして、暖房用加熱制御の実行を終了した後に、加熱作動が停止されている加熱器を通過した熱媒の温度が暖房用目標温度になるように循環流量を制御して暖房用端末に供給する余熱回収用加熱制御を実行して、熱媒を加熱器の余熱で暖房用目標温度に加熱する。
【００２９】
〔効果〕
加熱器の余熱で暖房用目標温度に加熱した熱媒を、加熱器と暖房用端末とに亘る循環路に沿って循環させることができるので、暖房用加熱制御の実行を終了した後の加熱器の余熱を暖房用に有効活用できる。
【００３０】
また、暖房用端末への熱媒供給要求は、一般に、設定暖房温度を維持するに必要な熱量が不足するようになると発生し、最小供給可能熱量が要求熱量より多い時、熱媒供給要求は間欠的に発生することになるが、熱媒供給要求がなくなった後も、加熱器の余熱を暖房用端末に供給できるので、次回の熱媒供給要求が発生するまでの時間間隔が、加熱器の余熱を暖房用端末に供給しない場合に比べて長くなり、その結果、加熱制御手段による加熱器の加熱作動の頻繁な入り切りを防止することができる。
【００３１】
ちなみに、熱媒供給要求がなくなった後に、加熱器の余熱で加熱した熱媒を暖房用端末に供給するので、暖房用端末における加熱量に多少のオーバーシュートが生じるが、その影響は無視できる程度と考えられる。
【００３２】
請求項７記載の発明の特徴構成は、前記余熱回収用加熱制御において、設定最小循環流量で循環を開始させて、前記加熱器を通過した熱媒が目標温度範囲の温度を越えて加熱されているか否かを判定し、前記目標温度範囲を越えて加熱されていると判定したときは、前記目標温度範囲内に加熱されるまで、現在の循環流量に設定流量を加算した循環流量で循環させる循環流量増大制御を繰り返し実行するように構成されている点にある。
【００３３】
〔作用〕
余熱回収用加熱制御において、設定最小循環流量で循環を開始させて、加熱器を通過した熱媒が目標温度範囲の温度を越えて加熱されているか否かを判定し、目標温度範囲を越えて加熱されていると判定したときは、目標温度範囲内に加熱されるまで、現在の循環流量に設定流量を加算した循環流量で循環させる循環流量増大制御を繰り返し実行して、目標温度範囲内に加熱できる最大の循環流量を求めて、その最大の循環流量で循環させることができる。
【００３４】
〔効果〕
加熱器の余熱で熱媒を目標温度に加熱するので、循環流量が加熱器の余熱に比べて多すぎると、目標温度に加熱されていない熱媒が対応する熱消費端末に供給されてしまって、かえって、熱消費端末の機能を損なうおそれがあるが、循環流量を徐々に増大させることにより、目標温度範囲内に加熱できる最大の循環流量で効率良く熱媒を循環させて、目標温度に加熱した熱媒を対応する熱消費端末に確実に供給できるので、熱消費端末の機能を損なうおそれが少ない。
【００３５】
【発明の実施の形態】
以下、本発明にかかる熱媒循環式加熱装置をエンジンヒートポンプ式冷暖房給湯システムに適応した例を図面に基づいて説明する。
【００３６】
〔第１実施形態〕
このエンジンヒートポンプ式冷暖房給湯システムは、図１および図２に示すように、貯湯ユニットＡと、エンジンヒートポンプ式冷暖房装置Ｂとから構成されている。
【００３７】
前記貯湯ユニットＡは、この貯湯ユニットＡの運転を制御する貯湯ユニット制御部Ｃ、貯湯タンク（熱消費端末の一例) １、熱媒としての湯水を加熱する加熱器としてのヒートポンプ式加熱器（以下、ＨＰ加熱器と略称する) ３３、暖房用端末（熱消費端末の一例) ２、湯水をＨＰ加熱器３３と貯湯タンク１や暖房用端末２とに亘って循環させるための循環路３などから構成され、循環ポンプＰ１の作動で湯水を循環路３に沿って循環させながら、ＨＰ加熱器３３にて貯湯用や暖房用の目標温度の湯に加熱して、温度成層を形成する状態で貯湯タンク１内に貯湯したり、暖房用端末２にて放熱させ、また、貯湯タンク１内に貯湯された湯水を給湯するように構成されている。
【００３８】
前記貯湯タンク１内には、上から順に、貯湯設定温度の湯の貯湯量が最低確保量以上であるかを、その湯温を検出することにより検出する最上部サーミスタＳ１、その貯湯量が少以上であるかを、その湯温を検出することにより検出する上部サーミスタＳ２、その貯湯量が中以上であるかを、その湯温を検出することにより検出する中部サーミスタＳ３、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Ｓ４が設けられている。
そして、使用者の必要に応じて貯湯リモコンＲ２などにより、貯湯タンク１内の目標貯湯量を、「少」、「中」、「満」の３つの貯湯量からひとつを選択できるようにしている。
【００３９】
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５と、その上部から風呂場や台所などに給湯するための給湯路６とが接続され、風呂場や台所などで使用された量だけの水を給水路５から貯湯タンク１に給水するように構成されている。
前記給湯路６には、給水路５から分岐された混合用給水路７が接続され、その接続箇所に給湯路６からの湯水と混合用給水路７からの水との混合比を調整自在なミキシングバルブ８が設けられている。
前記給水路５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９が設けられ、給水路５および混合用給水路７の夫々には、逆止弁１０が設けられている。
ちなみに、給湯路６には、オーバーフロー路１１が接続され、そのオーバーフロー路１１にエアー抜き弁１２が設けられている。
【００４０】
また、給湯路６におけるミキシングバルブ８よりも上流側には、貯湯タンク１の上部から給湯路６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１３が設けられ、給湯路６におけるミキシングバルブ８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１４、給湯路６の湯水の流量を調整する給湯用水比例バルブ１５、給湯路６を通流する湯水の流量を検出する給湯流量センサ２０が設けられている。
【００４１】
前記給湯路６を通して風呂場や台所に給湯するときには、給湯目標温度としての給湯設定温度、貯湯出口サーミスタ１３および給水サーミスタ９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８の開度を調整するとともに、ミキシングサーミスタ１４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８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ように構成されている。
【００４２】
前記循環路３は、その途中に、湯水を貯湯タンク１を通ってＨＰ加熱器３３に循環させるための貯湯用循環路２５と、湯水を暖房用端末２を通ってＨＰ加熱器３３に循環させるための放熱用循環路２６とを並列に設けて、貯湯タンク１と暖房用端末２とを互いに並列に設けてある。
また、貯湯用循環路２５をＨＰ加熱器３３にて加熱された温水を貯湯タンク１の上部に供給するように接続するとともに、貯湯タンク１内の底部の湯水を取り出す取り出し路２７に放熱用循環路２６を接続して、ＨＰ加熱器３３にて加熱した湯水を貯湯タンク１と暖房用端末２とに亘って循環させるように構成し、放熱用循環路２６の暖房用端末２よりも下流側には湯水を貯湯タンク１内に戻す戻し路２１を接続してある。
【００４３】
そして、貯湯用循環路２５に貯湯用開閉弁２８を設け、放熱用循環路２６の暖房用端末２よりも上流側に戻し開閉弁２９を設け、放熱用循環路２６の戻し路２１との接続箇所よりも下流側に放熱循環用開閉弁２３を設け、戻し路２１に初期貯湯用開閉弁２２を設けて、貯湯用開閉弁２８を開弁させることによって、循環路３を通流する湯水を貯湯タンク１内の上部に供給できるようにし、戻し開閉弁２９と放熱循環用開閉弁２３とを開弁させることによって、循環路３を通流する湯水を暖房用端末２を通してＨＰ加熱器３３に戻すことができるようにしている。
ちなみに、取り出し路２７には、貯湯タンク１内の湯水を排水するための排水路３０が接続され、その排水路３０の途中部には、安全弁３１と手動バルブ３２とが並列に接続されている。
【００４４】
前記ＨＰ加熱器３３は、エンジンヒートポンプ式冷暖房装置Ｂにより供給される冷媒で湯水を加熱するように構成され、湯水のＨＰ加熱器３３からの出温度を検出する加熱温度サーミスタ６１がＨＰ加熱器３３の下流側の循環路３に設けられ、ＨＰ加熱器３３の上流側の循環路３に、循環路３を通流する湯水の循環流量Ｒを検出する循環流量センサ６２と、循環ポンプＰ１と、循環路３を循環する湯水の循環流量Ｒを調整自在な循環流量調整バルブ６５とが設けられている。
【００４５】
そして、循環流量センサ６２の検出情報に基づいて、循環流量調整バルブ６５の開度を調整することにより循環路３における循環流量Ｒを調整するように構成され、加熱温度サーミスタ６１の検出情報に基づいて、循環路３における循環流量Ｒを調整することにより、ＨＰ加熱器３３にて加熱された後の循環路３を通流する湯水の温度を調整自在に構成され、循環調整手段Ｆが、循環流量センサ６２、循環流量調整バルブ６５、加熱温度サーミスタ６１などにより構成されている。
【００４６】
このようにして、貯湯用開閉弁２８、戻し開閉弁２９などの夫々の開閉弁を開閉制御することにより、貯湯タンク１の底部から取り出した湯水をＨＰ加熱器３３にて加熱したのち、その温水を貯湯タンク１の上部に戻したり、貯湯タンク１の底部から取り出した湯水をＨＰ加熱器３３にて加熱したのち、暖房用端末２にて放熱させてＨＰ加熱器３３に戻すように構成され、湯水を循環路３に沿って循環させる湯水循環手段Ｅが、循環路３、循環ポンプＰ１、および、初期貯湯用開閉弁２２、放熱循環用開閉弁２３、貯湯用開閉弁２８、戻し開閉弁２９などにより構成されている。
【００４７】
そして、湯水循環手段Ｅが、初期貯湯用開閉弁２２や放熱循環用開閉弁２３、貯湯用開閉弁２８、戻し開閉弁２９の開閉操作で、ＨＰ加熱器３３にて加熱した湯水を貯湯タンク１内に貯湯されるように循環させる貯湯運転状態と、ＨＰ加熱器３３にて加熱した湯水を暖房用端末２に供給する形態で循環させる暖房運転状態とに切り換え自在に構成されている。
【００４８】
前記暖房用端末２は、暖房ポンプＰ２を作動させることにより、暖房戻り路４６および暖房往き路４７を通して循環する暖房用熱媒としての温水と、放熱用循環路２６を循環する湯水とを熱交換するように設けられ、暖房戻り路４６には、上流側から順に、暖房戻り路４６の暖房用熱媒の温度を検出する暖房戻りサーミスタ４８、補給水タンク４９、暖房ポンプＰ２が設けられ、暖房往き路４７には、暖房往き路４７の暖房用熱媒の温度を検出する暖房往きサーミスタ５０が設けられている。
【００４９】
前記補給水タンク４９には、水位の上限を検出する上限センサ５１と下限を検出する下限センサ５２とが設けられ、補給水タンク４９に給水するためのタンク給水路５３が接続され、そのタンク給水路５３には、補給水電磁弁５４が設けられている。
また、暖房戻り路４６の暖房用熱媒を暖房用端末２を迂回して暖房往き路４７に供給する暖房バイパス路５５が設けられている。
暖房操作手段Ｊが、暖房戻りサーミスタ４８、暖房ポンプＰ２、暖房往きサーミスタ５０などで構成されている。
【００５０】
前記エンジンヒートポンプ式冷暖房装置Ｂは、空調対象空間の空調用やＨＰ加熱器３３における加熱作動用に設けられ、図２に示すように、複数の室内機７１、室外機７２、室内機７１および室外機７２の運転を制御するヒートポンプ運転制御部Ｄとから構成され、複数の空調対象空間（例えば、各部屋）を空調することができるように構成されている。
また、室内機７１と室外機７２と貯湯ユニットＡにおけるＨＰ加熱器３３とは、冷媒配管７３で接続され、エンジンヒートポンプ式冷暖房装置Ｂにおける冷媒をＨＰ加熱器３３に供給できるように構成されている。
【００５１】
前記複数の室内機７１の夫々には、電子膨張弁７４、室内熱交換器７５、その室内熱交換器７５で温調した空気を空調対象空間へ送出する室内空調用送風機７６が備えられ、室内熱交換器７５にて凝縮された冷媒の温度を検出する冷媒サーミスタ８９の検出情報に基づいて、電子膨張弁７４の開度を調整するようにしている。
前記室外機７２には、ガスエンジン７７、冷媒圧縮機７８、アキュムレータ７９、四方弁８０、室外熱交換器８１、その室外熱交換器に対し外気を通風する室外空調用送風機８２が備えられ、ガスエンジン７７の排熱を外部に放熱するためのラジエーター８３、および、ラジエーター用送風機８４も備えられ、ガスエンジン７７の冷却用の冷却水をラジエーター８３との間で循環させる冷却水路８５が設けられ、この冷却水路８５にラジエーター用ポンプＰ４が設けられている。ヒートポンプ運転手段Ｋが、電子膨張弁７４、室内空調用送風機７６、ガスエンジン７７、冷媒圧縮機７８、四方弁８０、室外空調用送風機８２などにより構成されている。
【００５２】
そして、エンジンヒートポンプ式冷暖房装置Ｂは、空調リモコンＲ１の指令に基づいてヒートポンプ運転制御部Ｄにて運転が制御され、ガスエンジン７７により冷媒圧縮機７８を作動させて、四方弁８０の切換え操作により空調冷房運転と空調暖房運転とを選択切換え自在に構成され、室内機７１の電子膨張弁７４の開閉制御により、空調要求のある部屋の空調を行うように構成されている。
また、ＨＰ加熱器３３にて循環路３の湯水を加熱するときには、空調暖房運転させるとともに、ＨＰ加熱器３３における冷媒圧力が設定目標圧力になるように冷媒圧縮機７８の回転速度と加熱用電子膨張弁７４ａを制御して、ＨＰ加熱器３３に冷媒を供給するように構成されている。
【００５３】
前記空調冷房運転においては、図２の実線矢印に示すように、冷媒圧縮機７８から吐出される高圧乾き蒸気冷媒を、四方弁８０を介して室外熱交換器８１に供給し、この室外熱交換器８１において外気との熱交換により凝縮される。
そして、室外熱交換器８１から送出される凝縮工程通過冷媒を、電子膨張弁７４を介して室内熱交換器７５に供給し、この室内熱交換器７５において冷却対象空気との熱交換により蒸発される。
その後、室内熱交換器７５から送出される低圧乾き蒸気冷媒を、四方弁８０およびアキュムレータ７９を介して冷媒圧縮機７８の吸入口に戻す。
【００５４】
前記空調暖房運転においては、図２の点線矢印に示すように、冷媒圧縮機７８から吐出される高圧乾き蒸気冷媒を、四方弁８０を介して室内熱交換器７５およびＨＰ加熱器３３に供給し、室内熱交換器７５においては加熱対象空気との熱交換により凝縮され、ＨＰ加熱器３３においては循環路３の湯水との熱交換により凝縮される。
そして、室内熱交換器７５およびＨＰ加熱器３３から送出される凝縮工程通過冷媒を、電子膨張弁７４を介して室外熱交換器８１に供給し、この室外熱交換器８１において外気との熱交換により蒸発される。
その後、室外熱交換器８１から送出される低圧乾き蒸気冷媒を四方弁８０およびアキュムレータ７９を介して冷媒圧縮機７８の吸入口に戻す。
【００５５】
前記貯湯ユニット制御部Ｃとヒートポンプ運転制御部Ｄとは、図３に示すように、エンジンヒートポンプ式冷暖房装置Ｂが空調運転中であることや、エンジンヒートポンプ式冷暖房装置Ｂへの駆動要求などの制御信号を送受信可能に構成にされ、貯湯ユニット制御部Ｃとヒートポンプ運転制御部Ｄとにより運転制御手段Ｕが構成されている。
【００５６】
そして、空調対象空間としての各部屋に設置されている空調リモコンＲ１の指令に基づいて、空調リモコンＲ１から空調冷房要求や空調暖房要求などの空調要求があると、ヒートポンプ運転制御部Ｄがヒートポンプ運転手段Ｋの運転を制御し、空調リモコンＲ１による空調要求に基づいて、ガスエンジン７７により冷媒圧縮機７８を作動させて、四方弁８０の切換え操作により空調冷房運転と空調暖房運転とを選択切換え、室内機７１の電子膨張弁７４の開閉制御により、各空調対象空間への空調を切り換えて、ヒートポンプ運転手段Ｋを制御するように構成されている。
【００５７】
また、貯湯リモコンＲ２の指令に基づいて、湯水循環手段Ｅにて循環される湯水をＨＰ加熱器３３にて貯湯用目標温度の湯に加熱して温度成層を形成する状態で貯湯タンク１内に貯湯する貯湯運転、貯湯タンク１内に所定量の温水を所定時間までに貯湯する予約貯湯運転、湯水循環手段Ｅにて循環される湯水をＨＰ加熱器３３にて暖房用目標温度の湯に加熱して暖房用端末２で放熱させる暖房運転、給湯運転の夫々の運転を実行するように構成されている。
【００５８】
前記貯湯ユニットＡの運転について説明すると、貯湯リモコンＲ２の要求指令などに基づいて、貯湯ユニット制御部Ｃが、湯水循環手段Ｅ、循環調整手段Ｆ、給湯操作手段Ｇ、暖房操作手段Ｊの夫々の運転を制御して、貯湯運転、暖房運転、給湯運転を実行するように構成され、この貯湯ユニット制御部Ｃが、湯水循環手段Ｅによる湯水の循環流量ＲとＨＰ加熱器３３の加熱作動とを制御する加熱制御手段に構成されている。
【００５９】
そして、図４に示すように、給湯要求があると（ステップ１) 給湯運転を実行し（ステップ２) 、暖房要求、つまり、暖房用端末２への湯水供給要求があると（ステップ３) 暖房運転を実行し（ステップ４) 、貯湯要求、つまり、貯湯タンク１への湯水供給要求があると（ステップ５) 貯湯運転を実行する（ステップ６) 。
【００６０】
前記貯湯運転は、貯湯タンク１内の貯湯量が最低確保量未満になったり、予約貯湯運転が指令されているときに、貯湯タンク１に貯湯設定温度の温水を目標貯湯量貯湯するための時刻になるなどして貯湯条件が満たされると、図５に示すように、湯水循環手段Ｅにて循環される湯水をＨＰ加熱器３３にて貯湯用目標温度に加熱して、温度成層を形成する状態で貯湯タンク内に貯湯設定温度の湯を貯湯目標量貯湯する貯湯用加熱制御を実行した後に（ステップ１０) 、ＨＰ加熱器３３の余熱（残熱) を貯湯用に回収する余熱回収用加熱制御Ａを実行する（ステップ１１) ように構成されている。
【００６１】
また、暖房運転は、暖房用端末２への湯水供給要求があると、図６に示すように、湯水循環手段Ｅにて循環される湯水をＨＰ加熱器３３にて暖房用目標温度に加熱して、暖房用端末２に供給する暖房用加熱制御を実行した後に（ステップ２０) 、ＨＰ加熱器３３の余熱（残熱) を貯湯用に回収する余熱回収用加熱制御Ｂや、ＨＰ加熱器３３の余熱（残熱) を暖房用に回収したり、予約貯湯運転が指令されているときに貯湯用に回収する余熱回収用加熱制御Ｃを実行する（ステップ２１) ように構成されている。
【００６２】
前記貯湯用加熱制御を、図７に示すフローチャートに基づいて、具体的に説明する。
加熱用電子膨張弁７４ａを開状態に制御してエンジンヒートポンプ式冷暖房装置Ｂを空調暖房運転させて、ＨＰ加熱器３３に冷媒を供給させるとともに、図１中の点線矢印に示すように、湯水循環手段Ｅを、貯湯タンク１の底部から取り出した湯水をＨＰ加熱器３３にて加熱したのち、その温水を貯湯タンク１の下部に戻す形態の初期貯湯運転状態に切り換えて運転させる（ステップ３０) 。
【００６３】
すなわち、貯湯用開閉弁２８と放熱循環用開閉弁２３とを閉弁させるとともに初期貯湯用開閉弁２２と戻し開閉弁２９とを開弁させて、循環ポンプＰ１を作動させ、貯湯タンク１の底部から取り出した湯水をＨＰ加熱器３３にて加熱したのち、その湯水を貯湯タンク１の底部に戻す形態で貯湯タンク１内の湯水を加熱するようにしている。
【００６４】
そして、加熱温度サーミスタ６１による検出温度が貯湯許容温度未満であるか否かを判定し（ステップ３１) 、検出温度が貯湯許容温度以上であると判定したときは、図１中の実線矢印に示すように、湯水循環手段Ｅを、貯湯タンク１内に湯水が温度成層を形成して貯湯されるように、貯湯タンク１の底部から取り出した湯水をＨＰ加熱器３３にて加熱したのち、その温水を貯湯タンク１の上部に供給する形態で湯水が循環するヒートポンプ貯湯運転状態（ＨＰ貯湯運転状態) に切り換えて、ＨＰ加熱器３３による湯水の加熱温度が、貯湯タンク１に応じた目標温度である貯湯用目標温度範囲の温度になるように、湯水循環手段Ｅによる湯水の循環流量Ｒを増減制御する（ステップ３２) 。
【００６５】
つまり、貯湯用開閉弁２８を開弁させるとともに、初期貯湯用開閉弁２２と戻し開閉弁２９とを閉弁させて、循環ポンプＰ１を作動させ、貯湯タンク１内に湯水が温度成層を形成して貯湯されるように、貯湯タンク１の底部から取り出した湯水をＨＰ加熱器３３にて加熱したのち、その湯水を貯湯タンク１の上部に戻す形態で貯湯タンク１内の湯水を加熱して、加熱温度サーミスタ６１による検出温度に基づいて、貯湯タンク１の上部に供給される湯水の温度が貯湯設定温度になるように循環流量調整バルブ６５の開度を調整する。
【００６６】
ちなみに、貯湯許容温度は、例えば、貯湯設定温度よりも２０℃低い温度として設定され、循環流量Ｒを調整することによりＨＰ加熱器３３にて加熱された湯水の温度を貯湯目標温度範囲の温度にすることができるような温度に設定されている。
【００６７】
そして、目標貯湯量に対応する上部サーミスタＳ２又は中部サーミスタＳ３または底部サーミスタＳ４が貯湯設定温度の湯温を検出するか否かにより、目標貯湯量の湯水が貯湯されたか否かを判定し（ステップ３３) 、目標貯湯量の湯水が貯湯された、つまり、貯湯要求がなくなったと判定すると、エンジンヒートポンプ式冷暖房装置ＢからＨＰ加熱器３３への冷媒供給を停止させることによって、ＨＰ加熱器３３の加熱作動を停止させて（ステップ３４) 、貯湯用加熱制御の実行を終了する。
【００６８】
次に、貯湯用加熱制御の実行を終了した後に、加熱作動が停止されているＨＰ加熱器３３を通過した湯水がＨＰ加熱器３３の余熱で貯湯用目標温度の温度になるように循環流量Ｒを制御して貯湯タンク１内の上部に貯湯する余熱回収用加熱制御Ａを説明する。
【００６９】
図８に示すように、循環流量Ｒが設定最小循環流量になるように循環流量調整バルブ６５の開度を調整して循環させる（ステップ４０) 。
尚、設定最小循環流量は、ＨＰ加熱器３３の蓄熱量や熱伝達効率、流路過熱限界から設定された流量である。
【００７０】
そして、ＨＰ加熱器３３を通過した湯水が貯湯用目標温度範囲の温度を越えて加熱されているか否かを加熱温度サーミスタ６１による検出温度に基づいて判定し（ステップ４１，４２) 、貯湯用目標温度範囲を越えて加熱されていると判定したときは、余熱の量が現在の循環流量Ｒに比較して多いので、貯湯用目標温度範囲内に加熱されるまで、現在の循環流量Ｒに設定流量を加算した循環流量Ｒになるように循環流量調整バルブ６５の開度を調整（ステップ４６) する循環流量増大制御（ステップ４１，４２，４６) を繰り返し実行する。
【００７１】
また、ＨＰ加熱器３３の余熱が減少してきて、ＨＰ加熱器３３を通過した湯水が貯湯用目標温度範囲の温度を下回ると、現在の循環流量Ｒに設定流量を減算した循環流量Ｒになるように循環流量調整バルブ６５の開度を調整し（ステップ４３) 、循環流量Ｒが最低流量未満になると（ステップ４４) 、循環ポンプＰ１の作動を停止させるとともに、貯湯用開閉弁２８を閉弁させる貯湯用運転終了処理（ステップ４５) を行って、余熱回収用加熱制御Ａを終了する。
尚、最低流量は、後沸き現象の発生や余熱回収の有効性を考慮して設定された貯湯ユニットＡに固有の流量である。
【００７２】
前記暖房用加熱制御を、図９に示すフローチャートに基づいて、具体的に説明する。
図９に示すように、加熱用電子膨張弁７４ａを開状態に制御してエンジンヒートポンプ式冷暖房装置Ｂを空調暖房運転させて、ＨＰ加熱器３３に冷媒を供給させるとともに、図１中の点線矢印に示すように、湯水循環手段Ｅを、貯湯タンク１の底部から取り出した湯水をＨＰ加熱器３３にて加熱したのち、その温水の熱を暖房用端末２において放熱させて貯湯タンク１の下部に戻す形態の暖房運転状態に切り換えるとともに、加熱温度サーミスタ６１による検出温度が暖房用目標温度になるように循環流量Ｒを制御する（ステップ５０) 。
【００７３】
すなわち、貯湯用開閉弁２８と初期貯湯用開閉弁２２とを閉弁させるとともに、戻し開閉弁２９と放熱循環用開閉弁２３とを開弁させて、循環ポンプＰ１を作動させ、加熱温度サーミスタ６１による検出温度が暖房用端末２に応じた目標温度である暖房用目標温度になるように循環流量調整バルブ６５の開度を調整しながら、貯湯タンク１の底部から取り出した湯水をＨＰ加熱器３３にて加熱したのち、その湯水を暖房用端末２を経由してＨＰ加熱器３３に戻す形態で循環させて湯水を加熱するようにしている。
【００７４】
そして、暖房用端末２への湯水供給要求がなくなると（ステップ５１) 、エンジンヒートポンプ式冷暖房装置ＢからＨＰ加熱器３３への冷媒供給を停止させることによって、ＨＰ加熱器３３の加熱作動を停止させて（ステップ５２) 、暖房用加熱制御の実行を終了する。
【００７５】
前記暖房用加熱制御の実行を終了した後に、ＨＰ加熱器３３の余熱を貯湯用に回収する余熱回収用加熱制御Ｂについて説明すると、図１０に示すように、湯水循環手段Ｅをヒートポンプ貯湯運転状態（ＨＰ貯湯運転状態) に切り換えて（ステップ６０) 、加熱作動が停止されているＨＰ加熱器３３を通過した湯水の温度が貯湯用目標温度になるように循環流量Ｒを制御して貯湯タンク１内の上部に貯湯する前述の余熱回収用加熱制御Ａを実行して（ステップ６１) 、余熱回収用加熱制御Ｂを終了する。
【００７６】
次に、前記暖房用加熱制御の実行を終了した後に、ＨＰ加熱器３３の余熱を暖房用に回収したり、予約貯湯運転が指令されているときに貯湯用に回収する余熱回収用加熱制御Ｃについて、図１１に示すフローチャートに基づいて、具体的に説明する。
【００７７】
予約貯湯運転が指令されている否かを判定して（ステップ７０) 、予約貯湯運転が指令されていない場合は、ＨＰ加熱器３３の余熱を暖房用に回収する制御を実行し、予約貯湯運転が指令されている場合は、貯湯用に回収する制御を実行する。
【００７８】
つまり、予約貯湯運転が指令されていない場合は、循環流量Ｒが設定最小循環流量になるように循環流量調整バルブ６５の開度を調整して循環させる（ステップ７１) 。
尚、設定最小循環流量は、ＨＰ加熱器３３の蓄熱量や熱伝達効率、流路過熱限界から設定された流量である。
【００７９】
そして、ＨＰ加熱器３３を通過した湯水が暖房用目標温度範囲の温度を越えて加熱されているか否かを加熱温度サーミスタ６１による検出温度に基づいて判定し（ステップ７２，７３) 、暖房用目標温度範囲を越えて加熱されていると判定したときは、余熱の量が現在の循環流量Ｒに比較して多いので、暖房用目標温度範囲内に加熱されるまで、現在の循環流量Ｒに設定流量を加算した循環流量Ｒになるように循環流量調整バルブ６５の開度を調整（ステップ７７) する循環流量増大制御（ステップ７２，７３，７７) を繰り返し実行する。
【００８０】
また、ＨＰ加熱器３３の余熱が減少してきて、ＨＰ加熱器３３を通過した湯水が暖房用目標温度範囲の温度を下回ると、現在の循環流量Ｒに設定流量を減算した循環流量Ｒになるように循環流量調整バルブ６５の開度を調整し（ステップ７４) 、循環流量Ｒが最低流量未満になると（ステップ７５) 、循環ポンプＰ１の作動を停止させるとともに、戻し開閉弁２９と放熱循環用開閉弁２３とを閉弁させる暖房用運転終了処理（ステップ７６) を行って、余熱回収用加熱制御Ｃを終了する。
尚、最低流量は、後沸き現象の発生や余熱回収の有効性を考慮して設定された貯湯ユニットＡに固有の流量である。
【００８１】
また、予約貯湯運転が指令されている場合は、前述の余熱回収用加熱制御Ｂを実行して（ステップ７８) 、余熱回収用加熱制御Ｃを終了する。
【００８２】
〔第２実施形態〕
図１２は、第１実施形態で示した湯水をＨＰ加熱器３３にて加熱した湯水を貯湯タンク１内に供給する形態で貯湯する方式の貯湯ユニットＡに代えて、貯湯用循環路２５を貯湯タンク１内に通して、ＨＰ加熱器３３にて貯湯用目標温度に加熱した湯水の熱を貯湯タンク１内の湯水と熱交換させることによって、貯湯タンク１内の湯水を設定貯湯温度に加熱して貯湯する方式の貯湯ユニットＡを示している。
【００８３】
前記貯湯タンク１内には、貯湯設定温度の湯の貯湯量が最低確保量以上であるかを、その湯温を検出することにより検出する上部サーミスタＳ１と、貯湯設定温度の湯の貯湯量が最大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底部サーミスタＳ４が設けられ、通常は最低確保量が目標貯湯量として設定され、使用者の必要に応じて貯湯リモコンＲ２などにより最大貯湯量を目標貯湯量として選択できるようにしている。
【００８４】
また、湯水循環手段Ｅが、貯湯用循環路２５に設けた貯湯用開閉弁２８を開弁するとともに、放熱用循環路２６に設けた戻し開閉弁２９を閉弁して、ＨＰ加熱器３３にて加熱した湯水を貯湯タンク１内の湯水と熱交換させて貯湯タンク１内に貯湯されるように循環させる貯湯運転状態と、貯湯用開閉弁２８を閉弁するとともに戻し開閉弁２９を開弁して、ＨＰ加熱器３３にて加熱した湯水を暖房用端末２にて放熱させる形態で循環させる暖房運転状態とに切り換え自在に構成されている。
【００８５】
本実施形態の貯湯ユニットＡの運転について、第１実施形態と異なる制御部分について説明する。
【００８６】
前記貯湯用加熱制御においては、図１３のフローチャートに示すように、加熱用電子膨張弁７４ａを開状態に制御してエンジンヒートポンプ式冷暖房装置Ｂを空調暖房運転させて、ＨＰ加熱器３３に冷媒を供給させるとともに、湯水循環手段Ｅを貯湯運転状態に切り換えて、加熱温度サーミスタ６１による湯水の検出温度が所定の貯湯用目標温度になるように、湯水循環手段Ｅによる湯水の循環流量Ｒを増減制御する（ステップ８０) 。
【００８７】
つまり、貯湯用開閉弁２８を開弁するとともに戻し開閉弁２９を閉弁させて、循環ポンプＰ１を作動させ、貯湯用循環路２５を循環する湯水の温度が貯湯用目標温度になるように循環流量調整バルブ６５の開度を調整する。
【００８８】
そして、目標貯湯量に対応する上部サーミスタＳ１または底部サーミスタＳ４が貯湯設定温度の湯温を検出したか否かにより、目標貯湯量の湯水が貯湯されたか否かを判定し（ステップ８１) 、目標貯湯量の湯水が貯湯された、つまり、貯湯要求がなくなったと判定すると、エンジンヒートポンプ式冷暖房装置ＢからＨＰ加熱器３３への冷媒供給を停止させることによって、ＨＰ加熱器３３の加熱作動を停止させて（ステップ８２) 、貯湯用加熱制御の実行を終了する。
【００８９】
図８に示す余熱回収用加熱制御Ａにおいては、ステップ４５において、循環ポンプＰ１の作動を停止させるとともに、貯湯用開閉弁２８を閉弁する貯湯用運転終了処理を実行する。
【００９０】
図９に示す暖房用加熱制御においては、ステップ５０において、湯水循環手段Ｅを貯湯用開閉弁２８を閉弁するとともに戻し開閉弁２９を開弁させる暖房運転状態に切り換える。
【００９１】
図１０に示す余熱回収用加熱制御Ｂにおいては、ステップ６０において、湯水循環手段Ｅを貯湯用開閉弁２８を開弁するとともに戻し開閉弁２９を閉弁させる貯湯運転状態に切り換える。
【００９２】
図１１に示す余熱回収用加熱制御Ｃにおいては、ステップ７６において、循環ポンプＰ１の作動を停止させるとともに、戻し開閉弁２９を閉弁する暖房用運転終了処理を実行する。
その他の構成は第１実施形態と同様であるので、その説明は省略する。
【００９３】
〔その他の実施形態〕
１．本発明による熱媒循環式加熱装置は、流量を調整自在な可変能力ポンプを設けて、その可変能力ポンプで循環路を循環する熱媒の循環流量を調整するように構成しても良い。
２．本発明による熱媒循環式加熱装置は、熱媒を加熱する加熱器として、バーナの燃焼により熱媒を加熱する瞬間式加熱装置を設けてあっても良い。
３．本発明による熱媒循環式加熱装置は、熱消費端末として、風呂の湯張り運転や追焚き運転を行うために湯水を加熱する風呂用端末を設けてあっても良い。
４．本発明による熱媒循環式加熱装置は、加熱制御手段が、熱消費端末への熱媒供給要求があると、加熱器による熱媒の加熱温度が熱消費端末に応じた目標温度になるように加熱器の加熱量のみを制御するように構成されていても良いし、加熱器による熱媒の加熱温度が熱消費端末に応じた目標温度になるように循環流量を制御し、かつ、加熱器の加熱量も制御するように構成されていても良い。
５．本発明による熱媒循環式加熱装置は、熱媒として、湯水，熱油，有機熱媒体などの液状熱媒の他、空気などのガス状熱媒を循環させるものであっても良い。
【図面の簡単な説明】
【図１】貯湯ユニットの概略構成図
【図２】エンジンヒートポンプ式冷暖房装置の概略構成図
【図３】エンジンヒートポンプ式冷暖房給湯システムの制御ブロック図
【図４】貯湯ユニット制御部の制御動作を示すフローチャート
【図５】貯湯運転における制御動作を示すフローチャート
【図６】暖房運転における制御動作を示すフローチャート
【図７】貯湯用加熱制御を示すフローチャート
【図８】余熱回収用加熱制御Ａを示すフローチャート
【図９】暖房用加熱制御を示すフローチャート
【図１０】余熱回収用加熱制御Ｂを示すフローチャート
【図１１】余熱回収用加熱制御Ｃを示すフローチャート
【図１２】第２実施形態の貯湯ユニットの概略構成図
【図１３】第２実施形態の貯湯用加熱制御を示すフローチャート
【符号の説明】
Ｃ加熱制御手段
Ｅ熱媒循環手段
Ｒ循環流量
１熱消費端末（貯湯タンク)
２熱消費端末（暖房用端末)
３循環路
６給湯路
３３加熱器[0001]
BACKGROUND OF THE INVENTION
The present invention provides a heat medium circulating means for circulating a heat medium along a circulation path extending from a heater for heating the heat medium and a heat consuming terminal, a circulation flow rate of the heat medium by the heat medium circulating means, Heating control means for controlling heating operation is provided, and when the heating control means has a heating medium supply request to the heat consuming terminal, the heating temperature of the heating medium by the heater depends on the heat consuming terminal. The heating control is performed to stop the heating operation of the heater when the circulation flow rate or the heating amount of the heater is controlled to reach the target temperature and the heating medium supply request is removed. The present invention relates to a configured heating medium circulation heating device.
[0002]
[Prior art]
Conventionally, in the above heating medium circulation type heating device, when there is a heating medium supply request to the heat consumption terminal, the heating medium circulation means so that the heating temperature of the heating medium by the heater becomes the target temperature corresponding to the heat consumption terminal Heating control that controls the circulating flow rate of the heating medium or the heating amount of the heater, stops the heating operation of the heater when the heating medium supply request disappears, and stops the heating medium circulation by the heating medium circulation means Is configured to run.
[0003]
[Problems to be solved by the invention]
For this reason, even if there is a residual heat that can heat the heating medium in the heater that has stopped the heating operation after the execution of the heating control, there is a drawback that the residual heat cannot be effectively used in the heat consuming terminal.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to effectively utilize the residual heat of the heater whose heating operation has been stopped after the execution of the heating control is terminated in the heat consuming terminal. To do.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a heat medium circulating means for circulating a heat medium along a circulation path extending between a heater for heating the heat medium and a heat consuming terminal, and a heat medium by the heat medium circulating means. Heating control means for controlling the circulation flow rate and the heating operation of the heater is provided, and when the heating control means has a heating medium supply request to the heat consuming terminal, the heating temperature of the heating medium by the heater Controls the circulating flow rate or the heating amount of the heater so as to reach the target temperature according to the heat consuming terminal, and stops the heating operation of the heater when the heating medium supply request disappears A heating medium circulation type heating device configured to execute heating control, wherein the heating control means passes through the heater whose heating operation is stopped after completing the execution of the heating control. The temperature of the heating medium becomes the target temperature so that In that it is configured to perform the preheating recovery heating control for controlling the recirculation amount.
[0006]
[Action]
When the heating control means has a heating medium supply request to the heat consuming terminal, the heating medium circulating flow rate by the heating medium circulating means is set so that the heating temperature of the heating medium by the heater becomes a target temperature corresponding to the heat consuming terminal. Alternatively, when the heating amount of the heater is controlled and the heating medium supply request disappears, heating control for stopping the heating operation of the heater is executed.
[0007]
Then, after the heating control is finished, the heat medium is circulated by the heat medium circulation means so that the temperature of the heat medium that has passed through the heater whose heating operation has been stopped becomes the target temperature due to the residual heat of the heater. The remaining heat recovery heating control for controlling the flow rate is executed.
[0008]
〔effect〕
Since the heating medium heated to the target temperature with the residual heat of the heater whose heating operation has been stopped can be circulated along the circulation path between the heater and the heat consuming terminal, after the execution of the heating control is finished The residual heat of the heater can be effectively used in the heat consuming terminal.
[0009]
According to a second aspect of the present invention, the heat consuming terminal is constituted by a hot water storage tank having a hot water supply path connected to an upper portion thereof, and when the heating control means has a hot water storage request in the hot water storage tank, The circulating flow rate is controlled so that the heating temperature of the heating medium by the heater becomes the target temperature for hot water storage, and when the hot water storage request is lost, the hot water storage heating control is performed to stop the heating operation of the heater. After the execution of the hot water storage heating control, the circulating flow rate is controlled so that the temperature of the heat medium that has passed through the heater whose heating operation has been stopped becomes the target temperature for hot water storage. It is in the point comprised so that the heating control for the remaining heat collection | recovery which stores hot water may be performed.
[0010]
[Action]
When there is a hot water storage request in the hot water storage tank, the heating control means controls the circulation flow rate so that the heating temperature of the heat medium by the heater becomes the target temperature for hot water storage, and when there is no hot water storage request, The hot water storage heating control for stopping the heating operation is executed.
[0011]
Then, after completing the execution of the hot water storage heating control, the circulating flow rate is controlled so that the temperature of the heat medium that has passed through the heater whose heating operation has been stopped becomes the target temperature for hot water storage due to the residual heat of the heater, and the hot water storage Heat control for recovering residual heat to store hot water in the tank is executed.
[0012]
〔effect〕
Since the heat medium heated to the target temperature for hot water storage with the remaining heat of the heater can be circulated along the circulation path extending between the heater and the hot water storage tank, the heater of the heater after the execution of the hot water storage heating control is finished. Residual heat can be effectively used for hot water storage.
[0013]
According to a third aspect of the present invention, the heat consuming terminal includes a heating terminal provided in parallel with the circulation path, and a hot water storage tank having a hot water supply path connected to an upper portion thereof, and the heat medium circulation. A hot water storage operation state in which the heat medium is circulated so that the hot water is stored in the hot water storage tank, and a heating operation state in which the heat medium is circulated in a form in which the heat medium heated by the heater is supplied to the heating terminal. The heating control means switches the heating medium circulating means to the heating operation state and heats the heating medium by the heater when the heating control means has a request to supply the heating medium to the heating terminal. When the circulation flow rate is controlled so that the temperature becomes the heating target temperature, and the heating medium supply request is removed, the heating heating control for stopping the heating operation of the heater is executed, and the heating heating is performed. The execution of control has ended In addition, the heat medium circulating means is switched to the hot water storage operation state, and the circulation flow rate is controlled so that the temperature of the heat medium that has passed through the heater whose heating operation has been stopped becomes the target temperature for hot water storage. It is in the point which is comprised so that the heating control for the residual heat recovery which stores hot water in a hot water storage tank may be performed.
[0014]
[Action]
When the heating control means requests the heating medium to be supplied to the heating terminal, the heating medium circulating means is switched to the heating operation state, and the circulation flow rate is adjusted so that the heating temperature of the heating medium by the heater becomes the heating target temperature. When the control is performed and the heating medium supply request disappears, heating control for heating that stops the heating operation of the heater is executed.
[0015]
Then, after completing the heating control for heating, the heating medium circulating means is switched to the hot water storage operation state, and the temperature of the heating medium that has passed through the heater whose heating operation has been stopped is the remaining heat of the heater and the target for hot water storage Heating control for recovering residual heat is performed to control the circulating flow rate so as to reach a temperature and store the hot water in the hot water storage tank.
[0016]
〔effect〕
Since the heating medium heated to the target temperature for hot water storage with the residual heat of the heater can be circulated along the circulation path extending between the heater and the hot water storage tank, the heating medium after the heating control for heating is finished. Residual heat can be effectively used for hot water storage.
[0017]
According to a fourth aspect of the present invention, the heat consuming terminal includes a heating terminal provided in parallel with the circulation path, and a hot water storage tank having a hot water supply path connected to an upper portion thereof, and the heat medium circulation. A hot water storage operation state in which the heat medium is circulated so that the hot water is stored in the hot water storage tank, and a heating operation state in which the heat medium is circulated in a form in which the heat medium heated by the heater is supplied to the heating terminal. The heating control means switches the heating medium circulating means to the heating operation state and heats the heating medium by the heater when the heating control means has a request to supply the heating medium to the heating terminal. When the circulation flow rate is controlled so that the temperature becomes the heating target temperature, and the heating medium supply request is removed, the heating heating control for stopping the heating operation of the heater is executed, and the heating heating is performed. The execution of control has ended In addition, the heating control for recovering residual heat is performed by controlling the circulation flow rate so that the temperature of the heating medium that has passed through the heater whose heating operation has been stopped becomes the heating target temperature and supplying the circulating flow rate to the heating terminal. It is in the point comprised as follows.
[0018]
[Action]
When the heating control means requests the heating medium to be supplied to the heating terminal, the heating medium circulating means is switched to the heating operation state, and the circulation flow rate is adjusted so that the heating temperature of the heating medium by the heater becomes the heating target temperature. When the control is performed and the heating medium supply request disappears, heating control for heating that stops the heating operation of the heater is executed.
[0019]
Then, after completing the heating control for heating, the circulating flow rate is controlled so that the temperature of the heat medium that has passed through the heater whose heating operation has been stopped becomes the heating target temperature due to the residual heat of the heater, and heating is performed. The remaining heat recovery heating control to be supplied to the terminal is executed.
[0020]
〔effect〕
The heating medium heated to the target temperature for heating with the residual heat of the heater can be circulated along the circulation path extending between the heater and the terminal for heating, so the heater after the heating control for heating is finished The remaining heat can be effectively used for heating.
[0021]
The heating medium supply request to the heating terminal is generally generated when the amount of heat necessary to maintain the set heating temperature is insufficient, and when the minimum heat supply amount is larger than the required heat amount, the heating medium supply request is Although it occurs intermittently, the remaining time of the heating medium can be supplied to the heating terminal even after the heating medium supply request disappears, so the time interval until the next heating medium supply request is generated As a result, frequent turning on and off of the heating operation of the heater by the heating control means can be prevented.
[0022]
By the way, since the heating medium heated with the residual heat of the heater is supplied to the heating terminal after the heating medium supply request disappears, some overshoot occurs in the heating amount at the heating terminal, but the effect is negligible it is conceivable that.
[0023]
According to a fifth aspect of the present invention, when a reserved hot water storage operation in which a predetermined amount of hot water is stored in the hot water storage tank by a predetermined time is instructed, the heating control means executes the heating control for heating. After the heating is completed, the heat medium circulation means is switched to the hot water storage operation state, and the circulation flow rate is controlled so that the temperature of the heat medium that has passed through the heater whose heating operation has been stopped becomes the target temperature for hot water storage. And it is in the point comprised so that the heating control for the remaining heat collection | recovery which stores hot water in the said hot water storage tank may be performed.
[0024]
[Action]
When a reserved hot water storage operation in which a predetermined amount of hot water is stored in the hot water storage tank by a predetermined time is instructed, after the heating control means finishes the heating control for heating, the heating medium circulation means is put into the hot water storage operation state. Heating control for recovering residual heat by switching and controlling the circulation flow rate so that the temperature of the heating medium that has passed through the heater whose heating operation has been stopped becomes the target temperature for hot water storage due to the residual heat of the heater. Execute.
[0025]
〔effect〕
When the reserved hot water storage operation is commanded, the heating medium heated to the target temperature for hot water storage with the remaining heat of the heater can be circulated along the circulation path between the heater and the hot water storage tank, so heating control for heating It is possible to effectively utilize the remaining heat of the heater after completing the execution of the reserved hot water storage.
[0026]
According to a sixth aspect of the present invention, the heat consuming terminal is configured as a heating terminal, and the heat medium circulating means supplies the heating medium heated by the heater to the heating terminal. The heating medium is circulated in a heating operation state in which the heating medium is circulated, and when the heating control unit has a heating medium supply request to the heating terminal, the heating temperature of the heating medium by the heater is heated. When the circulation flow rate is controlled to reach the target temperature for heating and the heating medium supply request disappears, the heating heating control for stopping the heating operation of the heater is executed, and the heating heating control is executed. After the heating operation is finished, the residual heat recovery heating control that supplies the heating terminal by controlling the circulation flow rate so that the temperature of the heating medium that has passed through the heater whose heating operation has been stopped becomes the heating target temperature. Is configured to run There to that point.
[0027]
[Action]
When there is a heating medium supply request to the heating terminal, the heating control unit controls the circulation flow rate so that the heating temperature of the heating medium by the heater becomes the heating target temperature, and there is no heating medium supply request. The heating control for heating is performed to stop the heating operation of the heater.
[0028]
Then, after finishing the heating control for heating, the circulating flow rate is controlled so that the temperature of the heating medium that has passed through the heater whose heating operation has been stopped becomes the heating target temperature, and is supplied to the heating terminal. The residual heat recovery heating control is executed to heat the heat medium to the heating target temperature with the residual heat of the heater.
[0029]
〔effect〕
The heating medium heated to the target temperature for heating with the residual heat of the heater can be circulated along the circulation path extending between the heater and the terminal for heating, so the heater after the heating control for heating is finished The remaining heat can be effectively used for heating.
[0030]
The heating medium supply request to the heating terminal is generally generated when the amount of heat necessary to maintain the set heating temperature is insufficient, and when the minimum heat supply amount is larger than the required heat amount, the heating medium supply request is Although it occurs intermittently, the remaining time of the heating medium can be supplied to the heating terminal even after the heating medium supply request disappears, so the time interval until the next heating medium supply request is generated As a result, frequent turning on and off of the heating operation of the heater by the heating control means can be prevented.
[0031]
By the way, since the heating medium heated with the residual heat of the heater is supplied to the heating terminal after the heating medium supply request disappears, some overshoot occurs in the heating amount at the heating terminal, but the effect is negligible it is conceivable that.
[0032]
According to the seventh aspect of the present invention, in the heating control for recovering residual heat, circulation is started at a set minimum circulation flow rate, and the heat medium that has passed through the heater is heated beyond a temperature in a target temperature range. If it is determined whether or not it is heated beyond the target temperature range, it is circulated at a circulating flow rate obtained by adding the set flow rate to the current circulating flow rate until it is heated within the target temperature range. The circulation flow rate increase control is configured to be repeatedly executed.
[0033]
[Action]
In the residual heat recovery heating control, circulation is started at the set minimum circulation flow rate, and it is determined whether or not the heat medium that has passed through the heater has been heated beyond the target temperature range. When it is determined that the target is within the target temperature range, the circulation flow rate increase control for circulating at a circulating flow rate that is the current circulating flow rate plus the set flow rate is repeatedly executed until the target temperature range is reached. The maximum circulating flow rate that can be heated can be obtained and circulated at the maximum circulating flow rate.
[0034]
〔effect〕
Since the heat medium is heated to the target temperature by the residual heat of the heater, if the circulation flow rate is too much compared to the residual heat of the heater, the heat medium that is not heated to the target temperature is supplied to the corresponding heat-consuming terminal. On the contrary, there is a possibility of impairing the function of the heat consumption terminal, but by gradually increasing the circulation flow rate, the heat medium is efficiently circulated at the maximum circulation flow rate that can be heated within the target temperature range, and heated to the target temperature. Since the heat medium can be reliably supplied to the corresponding heat consuming terminal, the function of the heat consuming terminal is less likely to be impaired.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example in which the heat medium circulation type heating device according to the present invention is applied to an engine heat pump type air conditioning and hot water supply system will be described with reference to the drawings.
[0036]
[First Embodiment]
As shown in FIGS. 1 and 2, this engine heat pump type air conditioning and hot water supply system includes a hot water storage unit A and an engine heat pump type air conditioning unit B.
[0037]
The hot water storage unit A includes a hot water storage unit controller C for controlling the operation of the hot water storage unit A, a hot water storage tank (an example of a heat consuming terminal) 1, a heat pump heater (hereinafter referred to as a heater for heating hot water as a heat medium). 33, a heating terminal (an example of a heat consuming terminal) 2, a circulation path 3 for circulating hot water between the HP heater 33, the hot water storage tank 1 and the heating terminal 2 Hot water is stored in a state in which temperature stratification is formed by heating to hot water for hot water storage or heating with the HP heater 33 while circulating hot water along the circulation path 3 by the operation of the circulation pump P1. Hot water is stored in the tank 1 or is radiated by the heating terminal 2, and hot water stored in the hot water storage tank 1 is supplied.
[0038]
In the hot water storage tank 1, in order from the top, the uppermost thermistor S1 that detects whether the hot water storage amount of the hot water storage set temperature is equal to or greater than the minimum ensured amount by detecting the hot water temperature, the hot water storage amount is small. The upper thermistor S2 for detecting whether the hot water temperature is above or not, the middle thermistor S3 for detecting whether the hot water storage amount is medium or higher, and the hot water storage amount is full. A bottom thermistor S4 is provided for detecting whether this is the case by detecting the hot water temperature.
And, according to the needs of the user, the hot water storage remote controller R2 can be used to select one of the three hot water storage amounts of "low", "medium", and "full" as the target hot water storage amount in the hot water storage tank 1. .
[0039]
The hot water storage tank 1 is connected to a hot water supply channel 5 for supplying hot water to the hot water storage tank 1 from the bottom using tap water pressure, and a hot water supply channel 6 for supplying hot water to a bathroom or kitchen from the upper part thereof. Only the amount of water used in the kitchen or the like is supplied from the water supply channel 5 to the hot water storage tank 1.
The hot water supply path 6 is connected to a mixing water supply path 7 branched from the water supply path 5, and the mixing ratio of the hot water from the hot water supply path 6 and the water from the mixing water supply path 7 can be adjusted to the connection location. A mixing valve 8 is provided.
A water supply thermistor 9 for detecting the water supply temperature is provided at a branch point between the water supply passage 5 and the mixing water supply passage 7, and a check valve 10 is provided in each of the water supply passage 5 and the mixing water supply passage 7. ing.
Incidentally, an overflow passage 11 is connected to the hot water supply passage 6, and an air vent valve 12 is provided in the overflow passage 11.
[0040]
Further, on the upstream side of the mixing valve 8 in the hot water supply passage 6, a hot water storage outlet thermistor 13 for detecting the temperature of the hot water supplied to the hot water supply passage 6 from the upper part of the hot water storage tank 1 is provided, and the mixing valve 8 in the hot water supply passage 6 is provided. On the further downstream side, a mixing thermistor 14 that detects the temperature of hot water mixed by the mixing valve 8, a hot water proportional valve 15 that adjusts the flow rate of hot water in the hot water supply path 6, and hot water flowing through the hot water supply path 6. A hot water supply flow rate sensor 20 for detecting the flow rate is provided.
[0041]
When hot water is supplied to the bathroom or kitchen through the hot water supply path 6, the temperature of the hot water to be supplied becomes the hot water supply set temperature based on the hot water set temperature as the hot water target temperature and the detection information of the hot water outlet thermistor 13 and the hot water thermistor 9. And adjusting the opening of the mixing valve 8 and finely adjusting the opening of the mixing valve 8 based on the deviation between the detected temperature and the hot water supply set temperature based on the detection information of the mixing thermistor 14. It is configured to supply hot water of temperature.
[0042]
On the way, the circulation path 3 circulates hot water through the hot water storage tank 1 to the HP heater 33 and circulates hot water through the heating terminal 2 to the HP heater 33. The heat-dissipating circulation path 26 is provided in parallel, and the hot water storage tank 1 and the heating terminal 2 are provided in parallel with each other.
Further, the hot water storage circulation path 25 is connected so as to supply hot water heated by the HP heater 33 to the upper part of the hot water storage tank 1, and the heat dissipation circulation 27 is taken out to the extraction path 27 for taking out hot water at the bottom of the hot water storage tank 1. The passage 26 is connected so that hot water heated by the HP heater 33 is circulated between the hot water storage tank 1 and the heating terminal 2, and the downstream side of the heating terminal 2 of the heat radiation circuit 26. Is connected to a return path 21 for returning hot water to the hot water storage tank 1.
[0043]
Then, a hot water storage opening / closing valve 28 is provided in the hot water storage circulation path 25, a return opening / closing valve 29 is provided upstream of the heating terminal 2 of the heat dissipation circulation path 26, and connection with the return path 21 of the heat dissipation circulation path 26 is performed. On the downstream side of the location, a heat radiation circulation on-off valve 23 is provided, an initial hot water on-off valve 22 is provided on the return path 21, and the hot water on-off valve 28 is opened, so that hot water flowing through the circulation path 3 is supplied. The hot water flowing through the circulation path 3 is supplied to the HP heater 33 through the heating terminal 2 by opening the return on / off valve 29 and the heat radiation circulation on / off valve 23 so that the hot water can be supplied to the upper part of the hot water storage tank 1. So that you can bring it back.
Incidentally, a drainage passage 30 for draining hot water in the hot water storage tank 1 is connected to the extraction passage 27, and a safety valve 31 and a manual valve 32 are connected in parallel to the middle portion of the drainage passage 30. .
[0044]
The HP heater 33 is configured to heat hot water with the refrigerant supplied by the engine heat pump air conditioner B, and a heating temperature thermistor 61 that detects the temperature at which the hot water is discharged from the HP heater 33 is provided with the HP heater 33. A circulation flow rate sensor 62 for detecting a circulation flow rate R of hot water flowing through the circulation path 3 in the circulation path 3 upstream of the HP heater 33, a circulation pump P1, A circulating flow rate adjusting valve 65 is provided that can adjust the circulating flow rate R of the hot water circulating in the circulation path 3.
[0045]
Then, the circulation flow rate R in the circulation path 3 is adjusted by adjusting the opening degree of the circulation flow rate adjustment valve 65 based on the detection information of the circulation flow rate sensor 62, and based on the detection information of the heating temperature thermistor 61. By adjusting the circulation flow rate R in the circulation path 3, the temperature of the hot water flowing through the circulation path 3 after being heated by the HP heater 33 can be freely adjusted. A flow rate sensor 62, a circulation flow rate adjustment valve 65, a heating temperature thermistor 61, and the like are included.
[0046]
Thus, hot water taken out from the bottom of the hot water storage tank 1 is heated by the HP heater 33 by controlling the opening / closing valves such as the hot water storage on / off valve 28 and the return on / off valve 29. The hot water extracted from the bottom of the hot water storage tank 1 is heated by the HP heater 33, and then radiated by the heating terminal 2 and returned to the HP heater 33. The hot water circulation means E for circulating hot water along the circulation path 3 includes the circulation path 3, the circulation pump P 1, the initial hot water storage opening / closing valve 22, the heat radiation circulation opening / closing valve 23, the hot water storage opening / closing valve 28, and the return opening / closing valve 29. Etc.
[0047]
Then, the hot water circulating means E opens and closes the initial hot water storage on / off valve 22, the heat radiation circulation on / off valve 23, the hot water storage on / off valve 28, and the return on / off valve 29 to open / close the hot water heated by the HP heater 33. The hot water storage operation state in which the hot water is circulated so that the hot water is stored therein and the heating operation state in which the hot water heated by the HP heater 33 is supplied to the heating terminal 2 are configured to be switched.
[0048]
The heating terminal 2 exchanges heat between hot water as a heating medium circulating through the heating return path 46 and the heating forward path 47 and hot water circulating through the heat dissipation circulation path 26 by operating the heating pump P2. The heating return path 46 is provided with a heating return thermistor 48 that detects the temperature of the heating medium in the heating return path 46, a makeup water tank 49, and a heating pump P2 in order from the upstream side. In the outbound path 47, a heating outbound thermistor 50 that detects the temperature of the heating medium in the heating outbound path 47 is provided.
[0049]
The replenishing water tank 49 is provided with an upper limit sensor 51 for detecting the upper limit of the water level and a lower limit sensor 52 for detecting the lower limit, and a tank water supply path 53 for supplying water to the replenishing water tank 49 is connected. A supply water electromagnetic valve 54 is provided in the path 53.
In addition, a heating bypass path 55 is provided that supplies the heating medium of the heating return path 46 to the heating forward path 47 by bypassing the heating terminal 2.
The heating operation means J includes a heating return thermistor 48, a heating pump P2, a heating forward thermistor 50, and the like.
[0050]
The engine heat pump type air conditioner B is provided for air conditioning in a space to be air conditioned or for heating operation in the HP heater 33, and as shown in FIG. 2, a plurality of indoor units 71, outdoor units 72, indoor units 71 and outdoor units are provided. It is comprised from the heat pump operation control part D which controls the driving | operation of the machine 72, and it is comprised so that a some air conditioning object space (for example, each room) can be air-conditioned.
The indoor unit 71, the outdoor unit 72, and the HP heater 33 in the hot water storage unit A are connected by a refrigerant pipe 73 so that the refrigerant in the engine heat pump air conditioner B can be supplied to the HP heater 33. .
[0051]
Each of the plurality of indoor units 71 is provided with an electronic expansion valve 74, an indoor heat exchanger 75, and an indoor air conditioner blower 76 for sending air temperature-controlled by the indoor heat exchanger 75 to the air-conditioning target space. The opening degree of the electronic expansion valve 74 is adjusted based on the detection information of the refrigerant thermistor 89 that detects the temperature of the refrigerant condensed in the heat exchanger 75.
The outdoor unit 72 includes a gas engine 77, a refrigerant compressor 78, an accumulator 79, a four-way valve 80, an outdoor heat exchanger 81, and an outdoor air conditioning blower 82 that ventilates the outdoor air to the outdoor heat exchanger. A radiator 83 for radiating the exhaust heat of the engine 77 to the outside and a fan 84 for the radiator are also provided, and a cooling water passage 85 for circulating cooling water for cooling the gas engine 77 between the radiator 83 is provided. The cooling water passage 85 is provided with a radiator pump P4. The heat pump operation means K includes an electronic expansion valve 74, an indoor air conditioner blower 76, a gas engine 77, a refrigerant compressor 78, a four-way valve 80, an outdoor air conditioner blower 82, and the like.
[0052]
The operation of the engine heat pump type air conditioner B is controlled by the heat pump operation control unit D based on the command of the air conditioning remote controller R1, and the refrigerant compressor 78 is operated by the gas engine 77 and the four-way valve 80 is switched. The air-conditioning cooling operation and the air-conditioning heating operation can be selectively switched, and the air-conditioning room is air-conditioned by opening / closing control of the electronic expansion valve 74 of the indoor unit 71.
When the hot water in the circulation path 3 is heated by the HP heater 33, the air conditioning heating operation is performed, and the rotational speed of the refrigerant compressor 78 and the heating electrons are set so that the refrigerant pressure in the HP heater 33 becomes the set target pressure. The refrigerant is supplied to the HP heater 33 by controlling the expansion valve 74a.
[0053]
In the air-conditioning cooling operation, as shown by the solid line arrow in FIG. 2, the high-pressure dry vapor refrigerant discharged from the refrigerant compressor 78 is supplied to the outdoor heat exchanger 81 via the four-way valve 80, and this outdoor heat exchange is performed. In the vessel 81, it is condensed by heat exchange with the outside air.
Then, the condensing process passing refrigerant sent from the outdoor heat exchanger 81 is supplied to the indoor heat exchanger 75 via the electronic expansion valve 74, and is evaporated by heat exchange with the air to be cooled in the indoor heat exchanger 75. The
Thereafter, the low-pressure dry vapor refrigerant delivered from the indoor heat exchanger 75 is returned to the suction port of the refrigerant compressor 78 via the four-way valve 80 and the accumulator 79.
[0054]
In the air-conditioning / heating operation, as shown by the dotted arrows in FIG. 2, the high-pressure dry vapor refrigerant discharged from the refrigerant compressor 78 is supplied to the indoor heat exchanger 75 and the HP heater 33 via the four-way valve 80. The indoor heat exchanger 75 is condensed by heat exchange with the air to be heated, and the HP heater 33 is condensed by heat exchange with hot water in the circulation path 3.
Then, the condensation process passing refrigerant sent from the indoor heat exchanger 75 and the HP heater 33 is supplied to the outdoor heat exchanger 81 via the electronic expansion valve 74, and heat exchange with the outside air is performed in the outdoor heat exchanger 81. Is evaporated.
Thereafter, the low-pressure dry vapor refrigerant sent from the outdoor heat exchanger 81 is returned to the suction port of the refrigerant compressor 78 via the four-way valve 80 and the accumulator 79.
[0055]
As shown in FIG. 3, the hot water storage unit control unit C and the heat pump operation control unit D control that the engine heat pump air conditioner B is in an air conditioning operation, a drive request to the engine heat pump air conditioner B, and the like. An operation control means U is configured by the hot water storage unit control unit C and the heat pump operation control unit D.
[0056]
And if there is an air conditioning request such as an air conditioning cooling request or an air conditioning heating request from the air conditioning remote controller R1 based on a command of the air conditioning remote controller R1 installed in each room as an air conditioning target space, the heat pump operation control unit D performs the heat pump operation. The operation of the means K is controlled, the refrigerant compressor 78 is operated by the gas engine 77 based on the air conditioning request by the air conditioning remote controller R1, and the air conditioning cooling operation and the air conditioning heating operation are selectively switched by the switching operation of the four-way valve 80, It is configured to control the heat pump operation means K by switching the air conditioning to each air conditioning target space by opening / closing control of the electronic expansion valve 74 of the indoor unit 71.
[0057]
Further, based on a command from the hot water storage remote controller R2, the hot water circulated by the hot water circulation means E is heated to hot water having a target temperature for hot water storage by the HP heater 33 to form a temperature stratification in the hot water storage tank 1. Hot water storage operation for storing hot water, reserved hot water storage operation in which a predetermined amount of hot water is stored in the hot water storage tank 1 by a predetermined time, and hot water circulated by the hot water circulation means E is heated to hot water at the heating target temperature by the HP heater 33. Then, each of the heating operation and the hot water supply operation in which heat is radiated by the heating terminal 2 is executed.
[0058]
The operation of the hot water storage unit A will be described. The hot water storage unit controller C performs each of the hot water circulation means E, the circulation adjustment means F, the hot water supply operation means G, and the heating operation means J based on a request command from the hot water remote controller R2. The hot water storage operation, the heating operation, and the hot water supply operation are executed by controlling the operation, and the hot water storage unit control unit C performs the hot water circulation flow rate R by the hot water circulation means E and the heating operation of the HP heater 33. It is comprised by the heating control means to control.
[0059]
As shown in FIG. 4, when there is a hot water supply request (step 1), a hot water supply operation is executed (step 2), and when there is a heating request, that is, a hot water supply request to the heating terminal 2 (step 3) The operation is executed (step 4), and when there is a hot water storage request, that is, a hot water supply request to the hot water storage tank 1 (step 5), a hot water storage operation is executed (step 6).
[0060]
In the hot water storage operation, when the hot water storage amount in the hot water storage tank 1 is less than the minimum secured amount or when the reserved hot water storage operation is instructed, the time for storing the hot water at the hot water storage set temperature in the hot water storage tank 1 is the target hot water storage amount. When the hot water storage condition is satisfied, for example, as shown in FIG. 5, the hot water circulated by the hot water circulation means E is heated to the target temperature for hot water storage by the HP heater 33 to form temperature stratification. After performing the hot water storage heating control for storing the target amount of hot water in the hot water storage tank in the state (step 10), the remaining heat recovery heating for recovering the residual heat (residual heat) of the HP heater 33 for hot water storage Control A is executed (step 11).
[0061]
Further, in the heating operation, when there is a hot water supply request to the heating terminal 2, the hot water circulated by the hot water circulation means E is heated to the heating target temperature by the HP heater 33, as shown in FIG. Then, after performing the heating control for heating supplied to the heating terminal 2 (step 20), the residual heat recovery heating control B for recovering the residual heat (residual heat) of the HP heater 33 for hot water storage, or the HP heater 33 The remaining heat (residual heat) is recovered for heating, or when the reserved hot water storage operation is commanded, the remaining heat recovery heating control C for recovering the hot water is executed (step 21).
[0062]
The hot water storage heating control will be specifically described based on a flowchart shown in FIG.
The heating electronic expansion valve 74a is controlled to open to cause the engine heat pump air-conditioning apparatus B to perform air-conditioning / heating operation so as to supply the refrigerant to the HP heater 33 and, as shown by the dotted arrows in FIG. After the hot water taken out from the bottom of the hot water storage tank 1 is heated by the HP heater 33, the means E is switched to the initial hot water storage operation state in which the hot water is returned to the lower part of the hot water storage tank 1 (step 30).
[0063]
That is, the hot water storage on-off valve 28 and the heat radiation circulation on-off valve 23 are closed and the initial hot water storage on-off valve 22 and the return on-off valve 29 are opened to operate the circulation pump P1, and the bottom of the hot water storage tank 1 is opened. After the hot water taken out from the hot water is heated by the HP heater 33, the hot water in the hot water storage tank 1 is heated in such a manner that the hot water is returned to the bottom of the hot water storage tank 1.
[0064]
Then, it is determined whether or not the temperature detected by the heating temperature thermistor 61 is lower than the allowable hot water storage temperature (step 31). When it is determined that the detected temperature is equal to or higher than the allowable hot water storage temperature, a solid line arrow in FIG. As described above, the hot water circulating means E is heated by the HP heater 33 after the hot water taken out from the bottom of the hot water storage tank 1 is heated so that the hot water is stored in the hot water storage tank 1 with temperature stratification. Is switched to a heat pump hot water storage operation state (HP hot water storage operation state) in which hot water circulates in a form in which hot water is supplied to the upper part of the hot water storage tank 1, and the heating temperature of the hot water by the HP heater 33 is a target temperature corresponding to the hot water storage tank 1. The hot water circulation flow rate R by the hot water circulation means E is controlled to increase or decrease so that the temperature falls within the target temperature range for hot water storage (step 32).
[0065]
That is, the hot water storage opening / closing valve 28 is opened, the initial hot water storage opening / closing valve 22 and the return opening / closing valve 29 are closed, the circulation pump P1 is operated, and hot water forms a temperature stratification in the hot water storage tank 1. After the hot water taken out from the bottom of the hot water storage tank 1 is heated by the HP heater 33 so that the hot water is returned to the upper part of the hot water storage tank 1, the hot water in the hot water storage tank 1 is heated. Based on the temperature detected by the heating temperature thermistor 61, the opening degree of the circulation flow rate adjustment valve 65 is adjusted so that the temperature of the hot water supplied to the upper part of the hot water storage tank 1 becomes the hot water storage set temperature.
[0066]
Incidentally, the hot water storage allowable temperature is set, for example, as a temperature 20 ° C. lower than the hot water storage set temperature, and the temperature of the hot water heated by the HP heater 33 by adjusting the circulation flow rate R is set to a temperature within the hot water storage target temperature range. The temperature is set so that it can be.
[0067]
Then, it is determined whether the hot water of the target hot water storage amount has been stored by determining whether the upper thermistor S2, the middle thermistor S3, or the bottom thermistor S4 corresponding to the target hot water storage amount detects the hot water temperature of the hot water set temperature (step). 33) When it is determined that the hot water of the target hot water storage amount has been stored, that is, there is no hot water storage request, the supply of the refrigerant from the engine heat pump air conditioner B to the HP heater 33 is stopped, thereby heating the HP heater 33. The operation is stopped (step 34), and the execution of the hot water storage heating control is terminated.
[0068]
Next, after the execution of the hot water storage heating control is completed, the circulating flow rate R is set so that the hot water passing through the HP heater 33 whose heating operation is stopped becomes the temperature of the hot water target temperature due to the residual heat of the HP heater 33. The remaining heat recovery heating control A for storing the hot water in the upper part of the hot water storage tank 1 will be described.
[0069]
As shown in FIG. 8, the opening of the circulation flow rate adjustment valve 65 is adjusted so that the circulation flow rate R becomes the set minimum circulation flow rate (step 40).
The set minimum circulation flow rate is a flow rate set based on the heat storage amount, heat transfer efficiency, and flow path overheat limit of the HP heater 33.
[0070]
Then, it is determined based on the temperature detected by the heating temperature thermistor 61 whether or not the hot water passing through the HP heater 33 is heated beyond the temperature in the hot water storage target temperature range (steps 41 and 42). When it is determined that the heating is over the temperature range, the amount of the remaining heat is larger than the current circulation flow rate R, so the current circulation flow rate R is set until it is heated within the target temperature range for hot water storage. The circulation flow rate increase control (steps 41, 42, 46) for adjusting the opening degree of the circulation flow rate adjustment valve 65 (step 46) so as to become the circulation flow rate R obtained by adding the flow rates is repeatedly executed.
[0071]
Further, when the residual heat of the HP heater 33 decreases and the hot water passing through the HP heater 33 falls below the temperature in the hot water storage target temperature range, the circulation flow rate R is obtained by subtracting the set flow rate from the current circulation flow rate R. Then, the opening degree of the circulation flow rate adjustment valve 65 is adjusted (step 43). When the circulation flow rate R becomes less than the minimum flow rate (step 44), the operation of the circulation pump P1 is stopped and the hot water storage opening / closing valve 28 is closed. A hot water storage operation end process (step 45) is performed, and the residual heat recovery heating control A is ended.
The minimum flow rate is a flow rate specific to the hot water storage unit A set in consideration of the occurrence of the post-boiling phenomenon and the effectiveness of the residual heat recovery.
[0072]
The heating control for heating will be specifically described based on the flowchart shown in FIG.
As shown in FIG. 9, the heating electronic expansion valve 74a is controlled to be in an open state to cause the engine heat pump type air conditioner B to perform air conditioning and heating operation so that the refrigerant is supplied to the HP heater 33, and a dotted line arrow in FIG. As shown, the hot water circulating means E heats the hot water taken out from the bottom of the hot water storage tank 1 with the HP heater 33, and then dissipates the heat of the hot water at the heating terminal 2 to be placed below the hot water storage tank 1. While switching to the heating operation state of the return mode, the circulation flow rate R is controlled so that the temperature detected by the heating temperature thermistor 61 becomes the heating target temperature (step 50).
[0073]
That is, the hot water storage opening / closing valve 28 and the initial hot water storage opening / closing valve 22 are closed, the return opening / closing valve 29 and the heat radiation circulation opening / closing valve 23 are opened, the circulation pump P1 is operated, and the heating temperature thermistor 61 is opened. The hot water taken out from the bottom of the hot water storage tank 1 is adjusted to the HP heater 33 while adjusting the opening of the circulation flow rate adjustment valve 65 so that the detected temperature by the heating becomes the heating target temperature corresponding to the heating terminal 2. Then, the hot water is circulated in such a manner that the hot water is returned to the HP heater 33 via the heating terminal 2 to heat the hot water.
[0074]
And when the hot water supply request | requirement to the terminal 2 for heating is lose | eliminated (step 51), the heating operation of the HP heater 33 is stopped by stopping the refrigerant | coolant supply from the engine heat pump type | formula air conditioning apparatus B to the HP heater 33. (Step 52), the heating control for heating is finished.
[0075]
The remaining heat recovery heating control B for recovering the remaining heat of the HP heater 33 for hot water storage after completing the heating control for heating will be described. As shown in FIG. 10, the hot water circulating means E is in the heat pump hot water storage operation state. (HP hot water storage operation state) (Step 60), the hot water storage tank 1 is controlled by controlling the circulation flow rate R so that the temperature of the hot water passing through the HP heater 33 whose heating operation is stopped becomes the target temperature for hot water storage. The above-described residual heat recovery heating control A for storing hot water in the upper part is executed (step 61), and the residual heat recovery heating control B is terminated.
[0076]
Next, after the execution of the heating control for heating, the remaining heat of the HP heater 33 is recovered for heating or when the reserved hot water storage operation is commanded, the remaining heat recovery heating control C is recovered for hot water storage. Is specifically described based on the flowchart shown in FIG.
[0077]
It is determined whether or not a reserved hot water storage operation is instructed (step 70). If the reserved hot water operation is not instructed, a control for recovering the remaining heat of the HP heater 33 for heating is executed, and the reserved hot water storage operation is performed. Is commanded, control for collecting for hot water storage is executed.
[0078]
That is, when the reserved hot water storage operation is not instructed, the opening of the circulation flow rate adjusting valve 65 is adjusted so that the circulation flow rate R becomes the set minimum circulation flow rate (step 71).
The set minimum circulation flow rate is a flow rate set based on the heat storage amount, heat transfer efficiency, and flow path overheat limit of the HP heater 33.
[0079]
Then, it is determined based on the temperature detected by the heating temperature thermistor 61 whether or not the hot water passing through the HP heater 33 is heated beyond the temperature in the heating target temperature range (steps 72 and 73). When it is determined that the heating is over the temperature range, the amount of the remaining heat is larger than the current circulating flow rate R, so the current circulating flow rate R is set until the heating is within the heating target temperature range. The circulation flow rate increase control (steps 72, 73, 77) for adjusting the opening degree of the circulation flow rate adjustment valve 65 (step 77) so as to become the circulation flow rate R obtained by adding the flow rates is repeatedly executed.
[0080]
Further, when the remaining heat of the HP heater 33 decreases and the hot water passing through the HP heater 33 falls below the temperature in the heating target temperature range, the circulation flow rate R is obtained by subtracting the set flow rate from the current circulation flow rate R. When the degree of opening of the circulation flow rate adjustment valve 65 is adjusted (step 74) and the circulation flow rate R becomes less than the minimum flow rate (step 75), the operation of the circulation pump P1 is stopped and the return opening / closing valve 29 and the opening / closing for heat radiation circulation are stopped. A heating operation end process (step 76) for closing the valve 23 is performed, and the residual heat recovery heating control C is ended.
The minimum flow rate is a flow rate specific to the hot water storage unit A set in consideration of the occurrence of the post-boiling phenomenon and the effectiveness of the residual heat recovery.
[0081]
When the reserved hot water storage operation is instructed, the above-described residual heat recovery heating control B is executed (step 78), and the residual heat recovery heating control C is terminated.
[0082]
[Second Embodiment]
FIG. 12 shows a hot water storage circuit 25 in place of the hot water storage unit A that stores hot water in a form in which hot water heated in the HP heater 33 is supplied into the hot water storage tank 1 as shown in the first embodiment. The hot water in the hot water storage tank 1 is heated to the set hot water temperature by exchanging the heat of the hot water heated to the target temperature for hot water storage by the HP heater 33 with the hot water in the hot water storage tank 1 through the tank 1. 1 shows a hot water storage unit A that stores hot water.
[0083]
In the hot water storage tank 1, there are an upper thermistor S <b> 1 that detects whether the amount of hot water stored at the hot water set temperature is equal to or greater than the minimum reserved amount, and the amount of hot water stored at the hot water set temperature is detected. A bottom thermistor S4 that detects whether the hot water storage amount is equal to or greater than the maximum hot water storage amount is provided. Usually, the minimum reserved amount is set as the target hot water storage amount, and a hot water storage remote control R2 or the like according to the user's needs Thus, the maximum hot water storage amount can be selected as the target hot water storage amount.
[0084]
Further, the hot water circulating means E opens the hot water storage opening / closing valve 28 provided in the hot water storage circulation path 25, and closes the return opening / closing valve 29 provided in the heat dissipation circulation path 26, thereby supplying the HP heater 33. The hot water heated and circulated so that the hot water in the hot water storage tank 1 is circulated so as to be stored in the hot water storage tank 1, and the hot water on-off valve 28 is closed and the return on-off valve 29 is opened. And it is comprised so that switching to the heating operation state which circulates the hot water heated with the HP heater 33 in the form which radiates heat with the terminal 2 for heating is possible.
[0085]
About the operation | movement of the hot water storage unit A of this embodiment, the control part different from 1st Embodiment is demonstrated.
[0086]
In the hot water storage heating control, as shown in the flowchart of FIG. 13, the heating electronic expansion valve 74 a is controlled to be in an open state, and the engine heat pump air-conditioning apparatus B is operated in an air-conditioning / heating operation, and refrigerant is supplied to the HP heater 33. The hot water circulation means E is switched to the hot water storage operation state, and the hot water circulation means E is controlled to increase or decrease the hot water circulation means E so that the detected temperature of the hot water by the heating temperature thermistor 61 becomes a predetermined target temperature for hot water storage. (Step 80).
[0087]
That is, the hot water storage on / off valve 28 is opened and the return on / off valve 29 is closed to operate the circulation pump P1 so that the temperature of the hot water circulating in the hot water storage circuit 25 is circulated so as to become the target temperature for hot water storage. The opening degree of the flow rate adjustment valve 65 is adjusted.
[0088]
Then, it is determined whether or not the hot water of the target hot water storage amount has been stored by determining whether the upper thermistor S1 or the bottom thermistor S4 corresponding to the target hot water storage amount has detected the hot water temperature of the hot water set temperature (step 81). If it is determined that the amount of hot water stored has been stored, that is, the hot water storage request has been lost, the heating operation of the HP heater 33 is stopped by stopping the supply of refrigerant from the engine heat pump air conditioner B to the HP heater 33. (Step 82), the execution of the hot water storage heating control is terminated.
[0089]
In the remaining heat recovery heating control A shown in FIG. 8, in step 45, the operation of the circulating pump P1 is stopped, and the hot water storage operation end process for closing the hot water storage opening / closing valve 28 is executed.
[0090]
In the heating control shown in FIG. 9, in step 50, the hot water circulating means E is switched to a heating operation state in which the hot water on-off valve 28 is closed and the return on-off valve 29 is opened.
[0091]
In the remaining heat recovery heating control B shown in FIG. 10, in step 60, the hot water circulating means E is switched to a hot water storage operation state in which the hot water storage opening / closing valve 28 is opened and the return opening / closing valve 29 is closed.
[0092]
In the remaining heat recovery heating control C shown in FIG. 11, in step 76, the operation of the circulation pump P1 is stopped, and the heating operation end process for closing the return on-off valve 29 is executed.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.
[0093]
[Other Embodiments]
1. The heating medium circulation type heating device according to the present invention may be configured to provide a variable capacity pump whose flow rate is adjustable, and to adjust the circulation flow rate of the heat medium circulating in the circulation path with the variable capacity pump.
2. The heating medium circulation heating device according to the present invention may be provided with an instantaneous heating device that heats the heating medium by burning a burner as a heater for heating the heating medium.
3. The heating medium circulation heating device according to the present invention may be provided with a bath terminal for heating hot water in order to perform a hot water bathing operation or a chasing operation as a heat consuming terminal.
4). In the heating medium circulation type heating device according to the present invention, when the heating control means has a heating medium supply request to the heat consuming terminal, the heating temperature of the heating medium by the heater becomes a target temperature corresponding to the heat consuming terminal. It may be configured to control only the heating amount of the heater, or the circulating flow rate is controlled so that the heating temperature of the heat medium by the heater becomes a target temperature corresponding to the heat consuming terminal, and the heater The amount of heating may also be controlled.
5. The heating medium circulation type heating device according to the present invention may circulate a gaseous heating medium such as air in addition to a liquid heating medium such as hot water, hot oil, or an organic heating medium as a heating medium.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hot water storage unit.
FIG. 2 is a schematic configuration diagram of an engine heat pump type air conditioner.
FIG. 3 is a control block diagram of an engine heat pump type air conditioning and hot water supply system.
FIG. 4 is a flowchart showing the control operation of the hot water storage unit controller.
FIG. 5 is a flowchart showing a control operation in hot water storage operation.
FIG. 6 is a flowchart showing a control operation in heating operation.
FIG. 7 is a flowchart showing heating control for hot water storage.
FIG. 8 is a flowchart showing heating control A for recovering residual heat.
FIG. 9 is a flowchart showing heating control for heating.
FIG. 10 is a flowchart showing heating control B for recovering residual heat.
FIG. 11 is a flowchart showing heating control C for recovering residual heat.
FIG. 12 is a schematic configuration diagram of a hot water storage unit according to a second embodiment.
FIG. 13 is a flowchart showing heating control for hot water storage according to the second embodiment.
[Explanation of symbols]
C Heating control means
E Heat medium circulation means
R Circulation flow rate
1 Heat consumption terminal (hot water storage tank)
2 Heat consumption terminal (heating terminal)
3 Circuits
6 Hot water supply path
33 Heater

Claims

A heat medium circulating means for circulating the heat medium along a circulation path extending from the heater for heating the heat medium and the heat consuming terminal;
A heating control means for controlling the circulating flow rate of the heating medium by the heating medium circulation means and the heating operation of the heater;
When the heating control means has a heating medium supply request to the heat consuming terminal, the circulating flow rate, or the heating flow rate so that the heating temperature of the heating medium by the heater becomes a target temperature corresponding to the heat consuming terminal, or A heating medium circulation heating device configured to control heating amount of the heater and to perform heating control to stop the heating operation of the heater when the heating medium supply request disappears,
For the residual heat recovery, the heating control means controls the circulation flow rate so that the temperature of the heat medium that has passed through the heater, whose heating operation has been stopped, becomes the target temperature after finishing the execution of the heating control. A heating medium circulation heating device configured to execute heating control.

The heat consuming terminal is composed of a hot water storage tank having a hot water supply channel connected to the upper part,
When there is a hot water storage request in the hot water storage tank, the heating control means controls the circulation flow rate so that the heating temperature of the heating medium by the heater becomes a target temperature for hot water storage, and the hot water storage request is eliminated. And hot water storage heating control for stopping the heating operation of the heater, and after the execution of the hot water storage heating control, the temperature of the heating medium that has passed through the heater that has stopped the heating operation is 2. The heating medium circulation heating device according to claim 1, wherein the heating medium circulation heating device is configured to execute a residual heat recovery heating control for controlling the circulation flow rate so as to be a target temperature for hot water storage and storing the hot water in the hot water storage tank.

The heat consuming terminal is composed of a heating terminal provided in parallel to the circulation path, and a hot water storage tank having a hot water supply path connected to the upper part,
The heat medium circulating means circulates the heat medium in a hot water storage operation state in which the heat medium is circulated so as to be stored in the hot water storage tank, and the heating medium heated by the heater is supplied to the heating terminal. It is configured to be switchable to the heating operation state to be
When the heating control means has a heating medium supply request to the heating terminal, the heating medium circulation means is switched to the heating operation state, and the heating temperature of the heating medium by the heater becomes the heating target temperature. After controlling the circulation flow rate and eliminating the heating medium supply request, after performing the heating control for heating to stop the heating operation of the heater, and after completing the execution of the heating control for heating, The hot water storage tank is controlled by switching the heat medium circulating means to the hot water storage operation state and controlling the circulation flow rate so that the temperature of the heat medium passing through the heater whose heating operation is stopped becomes the target temperature for hot water storage. The heating medium circulation heating device according to claim 1, wherein the heating control is performed to recover the remaining heat that is stored in the hot water.

The heat consuming terminal is composed of a heating terminal provided in parallel to the circulation path, and a hot water storage tank having a hot water supply path connected to the upper part,
The heat medium circulating means circulates the heat medium in a hot water storage operation state in which the heat medium is circulated so as to be stored in the hot water storage tank, and the heating medium heated by the heater is supplied to the heating terminal. It is configured to be switchable to the heating operation state to be
When the heating control means has a heating medium supply request to the heating terminal, the heating medium circulation means is switched to the heating operation state, and the heating temperature of the heating medium by the heater becomes the heating target temperature. As described above, when the circulation flow rate is controlled and the heating medium supply request disappears, the heating heating control for stopping the heating operation of the heater is executed, and after the heating heating control is finished, Residual heat recovery heating control for controlling the circulation flow rate so that the temperature of the heating medium that has passed through the heater whose heating operation has been stopped becomes the heating target temperature and supplying the circulating heat to the heating terminal is executed. The heating-medium circulation type heating device according to claim 1 constituted.

When a reserved hot water storage operation in which a predetermined amount of hot water is stored in the hot water storage tank by a predetermined time is instructed, after the heating control means finishes the heating control for heating, the heating medium circulation means is Residual heat recovery that switches to the hot water storage operation state and stores the hot water in the hot water storage tank by controlling the circulation flow rate so that the temperature of the heat medium that has passed through the heater that has stopped the heating operation becomes the target temperature for hot water storage The heating medium circulation type heating device according to claim 4, wherein the heating medium circulation type heating device is configured to execute heating control.

The heat consuming terminal comprises a heating terminal;
The heating medium circulation means is configured to circulate the heating medium in a heating operation state in which the heating medium is circulated in a form in which the heating medium heated by the heater is supplied to the heating terminal.
When there is a heating medium supply request to the heating terminal, the heating control means controls the circulation flow rate so that the heating temperature of the heating medium by the heater becomes a heating target temperature, and the heating medium When the supply request is lost, the heating control for heating that stops the heating operation of the heater is performed, and the heat that has passed through the heater that has been stopped after the heating control for heating is stopped The heating medium circulation heating according to claim 1, wherein the heating control for recovering residual heat is performed so as to control the circulating flow rate so that the temperature of the medium becomes a target temperature for heating and supply the heating terminal to the heating terminal. apparatus.

In the residual heat recovery heating control, circulation is started at a set minimum circulation flow rate, and it is determined whether or not the heat medium that has passed through the heater is heated beyond the temperature of the target temperature range, and the target temperature range When it is determined that the air is heated beyond the target temperature range, the circulation flow rate increase control for circulating at the circulation flow rate obtained by adding the set flow rate to the current circulation flow rate is repeatedly executed until the heating is performed within the target temperature range. The heating-medium circulation type heating device according to any one of claims 1 to 6.