JP3632445B2 - Heat pump bath water heater - Google Patents

Heat pump bath water heater Download PDF

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Publication number
JP3632445B2
JP3632445B2 JP16313398A JP16313398A JP3632445B2 JP 3632445 B2 JP3632445 B2 JP 3632445B2 JP 16313398 A JP16313398 A JP 16313398A JP 16313398 A JP16313398 A JP 16313398A JP 3632445 B2 JP3632445 B2 JP 3632445B2
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Japan
Prior art keywords
bathtub
water
bath
temperature
valve
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JPH11351666A (en
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吉継 西山
竹司 渡辺
志郎 竹下
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

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  • Heat-Pump Type And Storage Water Heaters (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、ヒートポンプサイクルを応用して、大気熱や太陽熱などを風呂の浴槽水の加熱に利用したり、大気熱や太陽熱や風呂の浴槽水の温熱を給湯の加熱などに利用する装置に関するものである。
【０００２】
【従来の技術】
従来より、ヒートポンプサイクルを用いて、外部の熱源から吸熱して、給湯、および、浴槽水の加熱を行う装置が知らされている。
【０００３】
図１３に、浴槽水の温熱を熱源とし、ヒートポンプによって給湯の加熱を行う装置の構成を示す。図１３のヒートポンプ風呂給湯機は、圧縮機１と、膨張弁２と、冷媒回路３と、給湯熱交換器４と、給湯水回路５と、給湯水タンク６と、風呂熱交換器７と、浴槽水循環回路８と、浴槽水循環ポンプ９と、浴槽１０と、風呂アダプター１１より構成されている。
【０００４】
浴槽の浴槽水の温熱を利用して、給湯の加熱運転をするときは、以下のような運転を行う。まず、浴槽１０の浴槽水を浴槽水循環ポンプ９で浴槽水循環回路８と、風呂熱交換器７を循環させる。そして、圧縮機１を運転して冷媒回路３内の冷媒を高温高圧に加圧し、給湯熱交換器４、膨張弁２、風呂熱交換器７の順に送る。冷媒は風呂熱交換器７で浴槽水の熱を吸熱し、その後圧縮機１で高温高圧に加圧され、冷媒は給湯熱交換器４で凝縮して給湯の加熱を行う。
【０００５】
この従来の構成において、効率よく浴槽水の冷却と加熱を行うために、例えば特公平８−２７０７９号公報に記載されているような方法などが提案されている。さらに、ヒートポンプの応用展開として、風呂浴槽水温熱を暖房に利用する特開平９−１５９２６７号公報に記載されているような例もある。
【０００６】
【発明が解決しようとする課題】
しかしながら、上記のような従来の構成では、以下に挙げる理由から、風呂浴槽水の温熱を有効に給湯の加熱に利用することは困難であった。
【０００７】
すなわち、風呂熱交換器７で冷媒により吸熱されて温度の低くなった浴槽水は、浴槽１０へ戻る。しかし、浴槽１０に戻った浴槽水の温度は、浴槽１０内の浴槽水の温度より低いので、両浴槽水の間には密度差が生じ、密度の大きい低温の浴槽水は浴槽１０の底部に向けて流れる。従って、風呂熱交換器７から戻ってきた低温の浴槽水は、浴槽１０の浴槽水と充分に撹拌されることなく、浴槽１０の底部に低温の層を形成する。故に浴槽１０内の槽水は、図１４に示すような、浴槽１０の底部の温度が低く上部の温度が高いような温度分布となる。このまま運転を続けていくと、浴槽１０の底部の浴槽水の低温層は厚みを増していき、浴槽の風呂アダプター１１まで達したときは、浴槽水循環ポンプ９により吸入される浴槽水の温度は著しく低下する。浴槽水循環温度が低下すると、ヒートポンプの効率が低下するばかりでなく、循環している浴槽水が吸熱された後で凍結するため、浴槽内上部の温熱を有効に給湯の加熱に利用できないままヒートポンプの運転を終了しなければならない。従って、浴槽内上部の温熱を有効に給湯の加熱に利用するためには、図１４のような浴槽１０内において低温層の生成を抑制し、浴槽の底部の温度が低く、上層部の温度が高いような温度分布を解消しなければならない。
【０００８】
そこで、本発明は前記する従来の問題点を解消することを課題とするものである。
【０００９】
【課題を解決するための手段】
本発明は上記課題を解決するために、圧縮機を有するヒートポンプ回路と、前記ヒートポンプ回路の冷媒と浴槽水が熱交換する風呂熱交換器を有する浴槽水回路と、前記ヒートポンプ回路の冷媒と給湯水が熱交換する給湯熱交換器を有する給湯水循環回路と、前記浴槽水循環回路または浴槽から浴槽水を系外へ放出する流路を開閉するための開閉弁を有する放出回路とを具備していて、前記風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収した後、前記開閉弁を開放して前記浴槽水を浴槽下部から系外へ放出し、放出後前記開閉弁を閉じて浴槽水の熱を回収するものである。
【００１０】
上記発明によれば、浴槽水の温熱を利用して給湯の加熱運転を行うときに、温度の低い浴槽水を放出回路から系外へ放出することによって、浴槽の底部の温度が低く、上層部の温度が高いような温度分布の形成を抑制することが出来る。
【００１１】
従って、浴槽水の温熱を有効かつ高効率に給湯の加熱に利用することができる。
【００１２】
【発明の実施の形態】
本発明は、各請求項に記載した構成とすることにより実施化することができるものであるから、その構成に加えて作用を併記することとする。
【００１３】
すなわち請求項１記載のように圧縮機を有するヒートポンプ回路と、前記ヒートポンプ回路の冷媒と浴槽水が熱交換する風呂熱交換器を有する浴槽水循環回路と、前記ヒートポンプ回路の冷媒と給湯水が熱交換する給湯熱交換器を有する給湯水循環回路と、前記浴槽水回路から浴槽水を系外へ放出する流路を開閉するための開閉弁を有する放出回路とを備える構成とし、前記風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱 を回収した後、前記開閉弁を開放して前記浴槽水を浴槽下部から系外へ放出し、放出後前記開閉弁を閉じて浴槽水の熱を回収するヒートポンプ風呂給湯機を実施することができる。
【００１４】
そして、温度の低い浴槽水を放出回路から系外へ放出することによって、浴槽の底部の温度が低く、上層部の温度が高いような温度分布の形成を抑制することが出来る。
【００１５】
また、請求項２記載のように圧縮機を有するヒートポンプ回路と、前記ヒートポンプ回路の冷媒と浴槽水が熱交換する風呂熱交換器を有する浴槽水循環回路と、前記ヒートポンプ回路の冷媒と給湯水が熱交換する給湯熱交換器を有する給湯水回路と、前記浴槽から浴槽水を系外へ放出する流路を開閉するための開閉弁を有する放出回路とを備え、前記風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収した後、前記開閉弁を開放して前記浴槽水を浴槽下部から系外へ放出し、放出後前記開閉弁を閉じて浴槽水の熱を回収するヒートポンプ風呂給湯機とすることができる。
【００１６】
そして、温度の低い浴槽水を放出回路から系外へ放出することによって、浴槽の底部の温度が低く、上層部の温度が高いような温度分布の形成を抑制することが出来る。
【００１７】
また、請求項３記載のように浴槽水循環回路または浴槽に浴槽水の温度を検知する温度センサーを備え、風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収する場合に、前記温度センサーの検知温度が所定温度以下になったら、前記開閉弁を所定の時間だけ開き、前記浴槽水循環回路の浴槽水を前記放出回路から系外へ放出する機能を備えたヒートポンプ風呂給湯機とすることができる。
【００１８】
そして、温度の低い浴槽水を放出回路から系外へ放出することによって、浴槽の底部の温度が低く、上層部の温度が高いような温度分布の形成を抑制することが出来る。
【００１９】
また、請求項４記載のように浴槽水循環回路または浴槽に浴槽水の温度を検知する温度センサーを備え、風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収する場合、前記温度センサーの検知温度が所定温度以下になったら前記開閉弁を開き、前記浴槽水回路の浴槽水を前記放出回路から系外へ放出し、その後前記温度センサーの検知温度が前記所定温度以上の浴槽上層部温度以上になったら前記開閉弁を閉じる機能を備えヒートポンプ風呂給湯機とすることができる。
【００２０】
そして、温度の低い浴槽水を放出回路から系外へ放出することによって、浴槽の底部の温度が低く、上層部の温度が高いような温度分布の形成を抑制することが出来る。
【００２１】
【実施例】
以下、本発明の実施例について図面を用いて説明する。
【００２２】
（実施例１）
図１は本発明における実施例１に係るものであり、本発明の構成を模式的に示したものである。本実施例のヒートポンプ給湯装置は、圧縮機１、膨張弁２、冷媒回路３、給湯熱交換器４、給湯水回路５、給湯水タンク６、風呂熱交換器７、浴槽水循環回路８、浴槽水循環ポンプ９、浴槽１０、風呂アダプター１１を具備している点で図１３に示す従来周知のヒートポンプ給湯装置と同じである。そして本実施例では、放出回路１２、放出回路１２を開閉するための開閉弁１３、制御手段１４を設けている点において特徴がある。そして、開閉弁１３は電磁弁やバルブ等で構成される。
【００２３】
次に動作と作用について説明する。浴槽１０の浴槽水の温熱を利用して、給湯水の加熱を行うときは、従来例と同様の動作を行う。従って、浴槽１０には図１４に示すような浴槽水の低温層が形成される。低温の浴槽水が再び、浴槽水循環回路８に流入するとヒートポンプ効率が低下するので、制御手段１４で図２に示すような動作を行う。圧縮機１の運転が所定運転時間を経過した後に開閉弁１３を開き、浴槽水を放出回路１２から系外に流出させる。所定時間だけ開閉弁１３を開いた後、再び開閉弁１３を閉じて浴槽水の系外への流出を停止する。このように、開閉弁１３を間欠的に開閉することによって、以下の作用が働く。すなわち浴槽１０に形成された浴槽水の低温層は、開閉弁１３が開いているとき放出回路１２を通じて系外へ放出される。浴槽水の低温層が系外へ放出されると浴槽の水位が下がるから、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するようになる。このときヒートポンプの効率は高くなる。再び、浴槽１０に低温層が形成され、ヒートポンプの効率が低下すると、開閉弁１３を開き浴槽水の低温層を系外へ放出し、浴槽の水位が下って浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入することになる。
【００２４】
開閉弁１３を開くまでの所定時間は、浴槽１０に浴槽水の低温層が形成されてヒートポンプの効率が低下するまでの時間とし、開閉弁１３を開く所定時間は、浴槽の水位が下がり、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するまでの時間とした。
【００２５】
尚、開閉弁１３が開くまでの時間は、ヒートポンプ効率が低下する前としても良く、さらに開閉弁１３が開いている時間は、所定量の浴槽水が放出されるまでの時間としても良い。
【００２６】
また、本実施例においては、放出回路１２を浴槽水が浴槽１０から浴槽水循環ポンプ９に至るまで値に設けた例としているが、放出回路１２は浴槽水循環回路８のどの位置に設置してもよい。さらに、本実施例では、ヒートポンプを動作させながら、浴槽水の排出を行っているが、圧縮機１を停止して循環ポンプのみを運転させたり、あるいは、装置を全停止している状態で排出させても良い。
【００２７】
また、本実施例では、開閉弁１３を間欠的に開閉して浴槽水を排出した例としたが、開閉弁１３を開放して、連続して浴槽水を排出しても同様の効果が得られる。
【００２８】
（実施例２）
図３は本発明における実施例２に係るものであり、本発明の構成は図１に示す実施例１の構成に温度センサー１５と制御手段１６を付加したものである。温度センサー１５にはサーミスターを使用したが、他にも、熱電対や、測温抵抗体などを用いても良い。
【００２９】
次に動作と作用について説明する。浴槽１０の浴槽水の温熱を利用して、給湯水の加熱を行うときは、従来例と同様の動作を行う。従って、浴槽１０には図１４に示すような浴槽水の低温層が形成される。低温の浴槽水が再び、浴槽水循環回路８に流入するとヒートポンプ効率が低下するので、制御手段１６で図４に示すような動作を行う。温度センサー１５の検知温度がＴ１以下になると開閉弁１３を開き、浴槽水を放出回路１２から系外に流出させる。所定時間ａだけ開閉弁１３を開いた後、再び開閉弁１３を閉じて浴槽水の系外への流出を停止する。このような開閉弁１３の開閉によって、以下の作用が働く。浴槽１０の温度がＴ１以下の低温層が浴槽水循環回路８に流入すると、開閉弁１３が開き、放出回路１２を通じて系外へ放出される。所定時間ａだけ開閉弁１３を開くと、浴槽水の低温層が系外へ放出され、浴槽の水位が下がるから、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するようになる。このときヒートポンプの効率は高くなる。再び、浴槽１０に低温層が形成され、温度センサー１５の検知温度がＴ１以下になると、開閉弁１３を開いて浴槽水の低温層を系外へ放出し、浴槽の水位が下って浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入することになる。
【００３０】
開閉弁１３を開いている所定時間ａは、浴槽の水位が下がり、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するまでの時間とした。
【００３１】
尚、開閉弁１３が開いている時間を、所定量の浴槽水が放出されるまでの時間としても良い。
【００３２】
また、本実施例においては、放出回路１２を浴槽水が浴槽１０から浴槽水循環ポンプ９に至るまでに設けた例としているが、放出回路１２は浴槽水循環回路８のどの位置に設置してもよい。さらに、本実施例では、ヒートポンプを動作させながら、浴槽水の排出を行っているが、圧縮機１を停止して循環ポンプのみを運転させたり、あるいは、装置を全停止している状態で排出させても良い。
【００３３】
また、温度センサー１５を図３に示す位置に配置したが、浴槽水循環回路８内の他の位置または浴槽１０内の位置でも構わない。
【００３４】
（実施例３）
図５は本発明における実施例３に係るものであり、本発明の構成は図１に示す実施例１の構成に温度センサー１５と制御手段１７を付加したものである。温度センサー１５にはサーミスターを使用したが、他にも、熱電対や、測温抵抗体などを用いても良い。
【００３５】
次に動作と作用について説明する。浴槽１０の浴槽水の温熱を利用して、給湯水の加熱を行うときは、従来例と同様の動作を行う。従って、浴槽１０には図１４に示すような浴槽水の低温層が形成される。低温の浴槽水が再び、浴槽水循環回路８に流入するとヒートポンプ効率が低下するので、制御手段１７で図６に示すような動作を行う。温度センサー１５の検知温度がＴ２以下になると開閉弁１３を開き、浴槽水を放出回路１２から系外に流出させる。その後温度センサー１５の検知温度がＴ３以上になると、開閉弁１３を閉じて浴槽水の系外への流出を停止する。このような開閉弁１３の開閉によって、以下の作用が働く。浴槽１０の温度がＴ２以下の低温層が浴槽水循環回路８に流入すると、開閉弁１３が開き、放出回路１２を通じて系外へ放出される。開閉弁１３を開くと、浴槽の水位が下がるから、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するようになる。このときヒートポンプの効率は高くなる。所定温度Ｔ３は浴槽上層部温度に設定されているので、浴槽上層部の浴槽水が浴槽水循環回路８へ流入すると、開閉弁１３は閉じられる。再び、浴槽１０に低温層が形成され、温度センサー１５の検知温度がＴ２以下になると、開閉弁１３を開いて浴槽水の低温層を系外へ放出し、浴槽の水位が下って浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入することになる。
【００３６】
尚、本実施例においては、放出回路１２を浴槽水が浴槽１０から浴槽水循環ポンプ９に至るまでに設けた例としているが、放出回路１２は浴槽水循環回路８のどの位置に設置してもよい。さらに、本実施例では、ヒートポンプを動作させながら、浴槽水の排出を行っているが、圧縮機１を停止して循環ポンプのみを運転させたり、あるいは、装置を全停止している状態で排出しても良い。
【００３７】
また、温度センサー１５を図５に示す位置に配置したが、浴槽水循環回路８内の他の位置または浴槽１０内の位置でも構わない。
【００３８】
（実施例４）
図７は本発明における実施例４に係るものであり、本発明の構成を模式的に示したものである。本実施例のヒートポンプ給湯装置は、圧縮機１、膨張弁２、冷媒回路３、給湯熱交換器４、給湯水回路５、給湯水タンク６、風呂熱交換器７、浴槽水循環回路８、浴槽水循環ポンプ９、浴槽１０、風呂アダプター１１、浴槽底部の放出回路１８、放出回路１８を開閉するための開閉弁１９、制御手段２０を設けている。そして、開閉弁１３は電磁弁やバルブ等で構成される。
【００３９】
次に動作と作用について説明する。浴槽１０の浴槽水の温熱を利用して、給湯水の加熱を行うときは、従来例と同様の動作を行う。従って、浴槽１０には図１４に示すような浴槽水の低温層が形成される。低温の浴槽水が再び、浴槽水循環回路８に流入するとヒートポンプ効率が低下するので、制御手段２０で図８に示すような動作を行う。圧縮機１の運転が所定運転時間を経過した後に開閉弁１９を開き、浴槽水を放出回路１８から系外に流出させる。所定時間だけ開閉弁１９を開いた後、再び開閉弁１９を閉じて浴槽水の系外への流出を停止する。このように、開閉弁１９を間欠的に開閉することによって、以下の作用が働く。浴槽１０に形成された低温層は、開閉弁１８が開いているとき放出回路１９を通じて系外へ放出される。浴槽水の低温層が系外へ放出されると浴槽の水位が下がるから、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するようになる。このときヒートポンプの効率は高くなる。再び、浴槽１０に低温層が形成され、ヒートポンプの効率が低下すると、開閉弁１９を開き浴槽水の低温層を系外へ放出し、浴槽の水位が下って浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入することになる。
【００４０】
開閉弁１９を開くまでの所定時間は、浴槽に低温層が形成されてヒートポンプの効率が低下するまでの時間とし、開閉弁１９を開く所定時間は、浴槽の水位が下がり、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するまでの時間とした。
【００４１】
尚、開閉弁１９が開くまでの時間を、ヒートポンプ効率が低下する前としても良く、さらに開閉弁１９が開いている時間を、所定量の浴槽水が放出されるまでの時間としても良い。
【００４２】
さらに、本実施例では、ヒートポンプを動作させながら、浴槽水の排出を行っているが、圧縮機１を停止して循環ポンプのみを運転させたり、あるいは、装置を全停止している状態で排出させても良い。
【００４３】
また、浴槽循環回路８より浴槽水を系外に放出する例では、浴槽底部から風呂アダプター１１にかけての低温層を排出することができなかったが、本実施例では浴槽底部より浴槽水を放出するので、より完全に浴槽水の低温層を系外へ排出することが出来る。
【００４４】
さらに、浴槽水循環回路８の循環水量に影響を与えないので、ヒートポンプサイクルも安定する。
【００４５】
また、本実施例では、開閉弁１３を間欠的に開閉して浴槽水を排出する例としたが、開閉弁１３を開放して、連続して浴槽水を排出しても良い。
【００４６】
（実施例５）
図９は本発明における実施例５に係るものであり、本発明の構成は図７の実施例４の構成に温度センサー２１と制御手段２２を付加したものである。温度センサー２１にはサーミスターを使用したが、他にも、熱電対や、測温抵抗体などを用いても良い。
【００４７】
次に動作と作用について説明する。浴槽１０の浴槽水の温熱を利用して、給湯水の加熱を行うときは、従来例と同様の動作を行う。従って、浴槽１０には図１４に示すような浴槽水の低温層が形成される。低温の浴槽水が再び、浴槽水循環回路８に流入するとヒートポンプ効率が低下するので、制御手段２２で図１０に示すような動作を行う。温度センサー２１の検知温度がＴ４以下になると開閉弁１９を開き、浴槽水を放出回路１８から系外に流出させる。所定時間ｂだけ開閉弁１９を開いた後、再び開閉弁１９を閉じて浴槽水の系外への流出を停止する。このような開閉弁１９の開閉によって、以下の作用が働く。浴槽１０の温度がＴ４以下の低温層が浴槽水循環回路８に流入すると、開閉弁１９が開き、放出回路１８を通じて系外へ放出される。
【００４８】
所定時間ｂだけ開閉弁１９を開くと、浴槽水の低温層が系外へ放出され、浴槽の水位が下がるから、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するようになる。このときヒートポンプの効率は高くなる。再び、浴槽１０に低温層が形成され、温度センサー２１の検知温度がＴ４以下になると、開閉弁１９を開いて浴槽水の低温層を系外へ放出し、浴槽の水位が下って浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入することになる。
【００４９】
開閉弁１９を開いている所定時間ｂは、浴槽の水位が下がり、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するまでの時間とした。
【００５０】
尚、開閉弁１９が開いている時間を、所定量の浴槽水が放出されるまでの時間としても良い。
【００５１】
本実施例では、ヒートポンプを動作させながら、浴槽水の排出を行っているが、圧縮機１を停止して循環ポンプのみを運転させたり、あるいは、装置を全停止している状態で排出させても良い。
【００５２】
また、浴槽循環回路８より浴槽水を系外に放出する例では、浴槽底部から風呂アダプター１１にかけての低温層を排出することができなかったが、本実施例では浴槽底部より放出するので、より完全に浴槽水の低温層を系外へ排出することが出来る。
【００５３】
さらに、浴槽水循環回路８の循環水量に影響を与えないので、ヒートポンプサイクルも安定する。
【００５４】
また、温度センサー２１を図９に示す位置に配置したが、浴槽水循環回路８内の他の位置または浴槽１０内の位置でも構わない。
【００５５】
（実施例６）
図１１は本発明における実施例６に係るものであり、本発明の構成は図７に示す実施例４の構成に温度センサー２１と制御手段２３を付加したものである。温度センサー２１にはサーミスターを使用したが、他にも、熱電対や、測温抵抗体などを用いても良い。
【００５６】
次に動作と作用について説明する。浴槽１０の浴槽水の温熱を利用して、給湯水の加熱を行うときは、従来例と同様の動作を行う。従って、浴槽１０には図１４に示すような浴槽水の低温層が形成される。低温の浴槽水が再び、浴槽水循環回路８に流入するとヒートポンプ効率が低下するので、制御手段２３で図１２に示すような動作を行う。すなわち温度センサー２１の検知温度がＴ５以下になると開閉弁１９を開き、浴槽水を放出回路１８から系外に流出させる。その後温度センサー２１の検知温度がＴ６以上になると、開閉弁１９を閉じて浴槽水の系外への流出を停止する。このような開閉弁１９の開閉によって、以下の作用が働く。浴槽１０の温度がＴ５以下の低温層が浴槽水循環回路８に流入すると、開閉弁１９が開き、放出回路１８を通じて系外へ放出される。開閉弁１９を開くと、浴槽の水位が下がるから、浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入するようになる。このときヒートポンプの効率は高くなる。所定温度Ｔ６は浴槽上層部温度に設定されているので、浴槽上層部の浴槽水が浴槽水循環回路８へ流入すると、開閉弁１９は閉じられる。再び、浴槽１０に低温層が形成され、温度センサー２１の検知温度がＴ５以下になると、開閉弁１９を開いて浴槽水の低温層を系外へ放出し、浴槽の水位が下って浴槽上層部の比較的温度の高い浴槽水が浴槽水循環回路８へ流入することになる。
【００５７】
本実施例では、ヒートポンプを動作させながら、浴槽水の排出を行っているが、圧縮機１を停止して循環ポンプのみを運転させたり、装置を全停止している状態で排出させても良い。
【００５８】
また、浴槽循環回路８より浴槽水を放出する例では、浴槽底部から風呂アダプター１１にかけての低温層を排出できなかったが、本実施例では浴槽底部より浴槽水を放出するので、より完全に浴槽水の低温層を系外へ排出することが出来る。
【００５９】
さらに、浴槽水循環回路８の循環水量に影響を与えないので、ヒートポンプサイクルも安定する。
【００６０】
また、温度センサー２１を図１１に示す位置に配置したが、浴槽水循環回路８内の他の位置または浴槽１０内の位置でも構わない。
【００６１】
以上のように、本発明のヒートポンプ給湯機においては、次の効果が得られる。
【００６２】
（１）圧縮機を有するヒートポンプ回路と、前記ヒートポンプ回路の冷媒と浴槽水が熱交換する風呂熱交換器を有する浴槽水循環回路と、前記ヒートポンプ回路の冷媒と給湯水が熱交換する給湯熱交換器を有する給湯水回路と、前記浴槽水循環回路から浴槽水を系外へ放出する流路を開閉するための開閉弁を有する放出回路とを備え、前記風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収した後、前記開閉弁を開放して前記浴槽水を浴槽下部から系外へ放出し、放出後前記開閉弁を閉じて浴槽水の熱を回収することを特徴とすることにより、浴槽水の温熱を利用して給湯の加熱運転を行う場合に、浴槽の底部に運転効率に不利な浴槽水の低温層が形成されても、浴槽水循環回路に設置した放出回路からこの低温層を系外に排出することが出来る。
【００６３】
したがって、浴槽水の温熱を有効に給湯の加熱に利用できる。さらに、装置の高効率化が実現される。
【００６４】
（２）圧縮機を有するヒートポンプ回路と、前記ヒートポンプ回路の冷媒と浴槽水が熱交換する風呂熱交換器を有する浴槽水循環回路と、前記ヒートポンプ回路の冷媒と給湯水が熱交換する給湯熱交換器を有する給湯水回路と、前記浴槽から浴槽水を系外へ放出する流路を開閉するための開閉弁を有する放出回路とを備え、前記風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収した後、前記開閉弁を開放して前記浴槽水を浴槽下部から系外へ放出し、放出後前記開閉弁を閉じて浴槽水の熱を回収することにより、浴槽水の温熱を利用して給湯の加熱運転を行う場合に、浴槽の底部に運転効率に不利な浴槽水の低温層が形成されても、浴槽に設置した放出回路からこの低温層を系外に排出することが出来る。
【００６５】
したがって、浴槽水の温熱を有効に給湯の加熱に利用できる。さらに、装置の高効率化が実現される。
【００６６】
また、浴槽底部から浴槽水を排出するので、浴槽の低温層を完全に排出でき、さらには、浴槽水循環量に影響を与えないので、装置の安定性と性能が向上する。
【００６７】
（３）浴槽水循環回路または浴槽内に浴槽水の温度を検知する温度センサーを備え、風 呂熱交換器でヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収する場合、前記温度センサーの検知温度が所定温度以下になったら前記開閉弁を所定の時間だけ開くことにより、浴槽水の温熱を利用して給湯の加熱運転を行う場合に、浴槽の底部に運転効率に不利な浴槽水の低温層が形成されても、浴槽水循環回路に設置した放出回路からこの低温層を系外に排出することが出来る。
【００６８】
したがって、浴槽水の温熱を有効に給湯の加熱に利用できる。さらに、装置の高効率化が実現される。
【００６９】
また、温度センサーを基に浴槽水を排出するので、浴槽の大きさや浴槽水位に関わらず、正確に低温の浴槽水を排出できる。従って、装置の性能と施工性が向上する。
【００７０】
温度センサーによって、浴槽の温度やシステムの異常を検知できるので、より信頼性の高いヒートポンプ風呂給湯機を構築することが出来る。
【００７１】
（４）浴槽水循環回路または浴槽内に浴槽水の温度を検知する温度センサーを備え、風呂熱交換器でヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収する場合、前記温度センサーの検知温度が所定温度以下になったら前記開閉弁を開き、前記温度センサーの検知温度が所定温度以上になったら前記開閉弁を閉じることにより、浴槽水の温熱を利用して給湯の加熱運転を行う場合に、浴槽の底部に運転効率に不利な浴槽水の低温層が形成されても、浴槽水循環回路に設置した放出回路からこの低温層を系外に排出することが出来る。
【００７２】
したがって、浴槽水の温熱を有効に給湯の加熱に利用できる。さらに、装置の高効率化が実現される。
【００７３】
また、温度センサーを基に浴槽水を排出するので、浴槽の大きさや浴槽水位に関わらず、正確に低温の浴槽水を排出できる。従って、装置の性能と施工性が向上する。
【００７４】
温度センサーによって、浴槽の温度やシステムの異常を検知できるので、より信頼性の高いヒートポンプ風呂給湯機を構築することが出来る。
【００７５】
【発明の効果】
以上のように本発明のヒートポンプ式風呂給湯システムによれば、浴槽水の温熱を利用して給湯の加熱運転を行う場合に、浴槽の底部に運転効率に不利な浴槽水の低温層が形成されても、浴槽水循環回路に設置した放出回路からこの低温層を系外に排出することが出来る。
【図面の簡単な説明】
【図１】本発明の実施例１におけるヒートポンプ風呂給湯機の構成図
【図２】同浴槽水位と浴槽水循環温度と放出回路の開閉弁の動作との関係を示した図
【図３】本発明の実施例２におけるヒートポンプ風呂給湯機の構成図
【図４】同浴槽水位と浴槽水循環温度と放出回路の開閉弁の動作との関係を示した図
【図５】本発明の実施例３におけるヒートポンプ風呂給湯機の構成図
【図６】同浴槽水位と浴槽水循環温度と放出回路の開閉弁の動作との関係を示した図
【図７】本発明の実施例４におけるヒートポンプ風呂給湯機の構成図
【図８】同浴槽水位と浴槽水循環温度と放出回路の開閉弁の動作との関係を示した図
【図９】本発明の実施例５におけるヒートポンプ風呂給湯機の構成図
【図１０】同浴槽水位と浴槽水循環温度と放出回路の開閉弁の動作との関係を示した図
【図１１】本発明の実施例６におけるヒートポンプ風呂給湯機の構成図
【図１２】同浴槽水位と浴槽水循環温度と放出回路の開閉弁の動作との関係を示した図
【図１３】従来のヒートポンプ風呂給湯機の構成図
【図１４】同浴槽水温度の状態を示した図
【符号の説明】
１ 圧縮機
２ 膨張弁
３ 冷媒回路
４ 給湯熱交換器
５ 給湯水回路
７ 風呂熱交換器
８ 浴槽水循環回路
９ 浴槽水循環ポンプ
１０ 浴槽
１１ 風呂アダプター
１２、１８ 放出回路
１３、１９ 開閉弁
１４、１６、１７、２０、２２、２３ 制御手段
１５、２１ 温度センサー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus that applies heat pump cycle to use atmospheric heat or solar heat for heating bath tub water, or uses atmospheric heat, solar heat, or bath water temperature for heating hot water. It is.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known an apparatus that uses a heat pump cycle to absorb heat from an external heat source to heat hot water and bath water.
[0003]
In FIG. 13, the structure of the apparatus which heats hot water supply with a heat pump using the heat of bathtub water as a heat source is shown. The heat pump bath water heater of FIG. 13 includes a compressor 1, an expansion valve 2, a refrigerant circuit 3, a hot water heat exchanger 4, a hot water circuit 5, a hot water tank 6, a bath heat exchanger 7, The bathtub water circulation circuit 8, the bathtub water circulation pump 9, the bathtub 10, and the bath adapter 11 are comprised.
[0004]
When the hot water heating operation is performed using the temperature of the bathtub water, the following operation is performed. First, the bathtub water circulation circuit 8 and the bath heat exchanger 7 are circulated through the bathtub water circulation pump 9 in the bathtub water of the bathtub 10. Then, the compressor 1 is operated to pressurize the refrigerant in the refrigerant circuit 3 to a high temperature and high pressure, and the hot water supply heat exchanger 4, the expansion valve 2, and the bath heat exchanger 7 are sent in this order. The refrigerant absorbs the heat of the bath water in the bath heat exchanger 7 and is then pressurized to high temperature and high pressure in the compressor 1, and the refrigerant condenses in the hot water supply heat exchanger 4 to heat the hot water supply.
[0005]
In this conventional configuration, in order to efficiently cool and heat bath water, a method as described in, for example, Japanese Patent Publication No. 8-27079 has been proposed. Furthermore, as an application development of the heat pump, there is an example as described in Japanese Patent Application Laid-Open No. 9-159267 that uses bath tub water temperature heat for heating.
[0006]
[Problems to be solved by the invention]
However, in the conventional configuration as described above, it has been difficult to effectively use the hot water of the bath tub water for heating hot water for the following reasons.
[0007]
That is, the bathtub water that has been absorbed by the refrigerant in the bath heat exchanger 7 and has a low temperature returns to the bathtub 10. However, since the temperature of the bathtub water returned to the bathtub 10 is lower than the temperature of the bathtub water in the bathtub 10, a density difference is generated between the two bathtub waters, and the low-temperature bathtub water having a large density is at the bottom of the bathtub 10. It flows toward. Therefore, the low-temperature bathtub water returned from the bath heat exchanger 7 forms a low-temperature layer at the bottom of the bathtub 10 without being sufficiently stirred with the bathtub water of the bathtub 10. Therefore, the bath water in the bathtub 10 has such a temperature distribution that the temperature at the bottom of the bathtub 10 is low and the temperature at the top is high, as shown in FIG. If the operation is continued as it is, the low temperature layer of the bathtub water at the bottom of the bathtub 10 increases in thickness, and when reaching the bathtub adapter 11 of the bathtub, the temperature of the bathtub water sucked by the bathtub water circulation pump 9 is remarkably high. descend. When the bath water circulation temperature decreases, not only does the efficiency of the heat pump decrease, but the circulating bath water freezes after it has absorbed heat, so the heat in the upper part of the bathtub cannot be used effectively for heating the hot water supply. Driving must be terminated. Therefore, in order to effectively use the heat in the upper part of the bathtub for heating hot water, the generation of a low temperature layer is suppressed in the bathtub 10 as shown in FIG. 14, the temperature of the bottom of the bathtub is low, and the temperature of the upper layer is low. The high temperature distribution must be eliminated.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described conventional problems.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a heat pump circuit having a compressor, a bath water circuit having a bath heat exchanger in which heat is exchanged between the refrigerant of the heat pump circuit and the bath water, and the refrigerant of the heat pump circuit and hot water. A hot water supply circuit having a hot water heat exchanger for exchanging heat, and a discharge circuit having an on-off valve for opening and closing a flow path for discharging the bathtub water from the bathtub or the bathtub to the outside of the system, In the bath heat exchanger, the refrigerant in the heat pump circuit is evaporated to recover the heat of the bath water.After that, the on-off valve is opened to release the bathtub water from the lower part of the bathtub to the outside of the system, and after the release, the on-off valve is closed to recover the heat of the bathtub water.Is.
[0010]
According to the above invention, when the hot water heating operation is performed using the temperature of the bath water, the bath temperature at the bottom of the bath is lowered by discharging the bath water having a low temperature out of the system from the discharge circuit, and the upper layer portion. The formation of a temperature distribution with a high temperature can be suppressed.
[0011]
Therefore, the temperature of the bath water can be effectively and efficiently used for heating hot water.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Since the present invention can be implemented by adopting the configuration described in each claim, the operation will be described in addition to the configuration.
[0013]
That is, a heat pump circuit having a compressor as in claim 1, a bath water circulation circuit having a bath heat exchanger that exchanges heat between the refrigerant of the heat pump circuit and bath water, and heat exchange between the refrigerant of the heat pump circuit and hot water supply water A hot water supply circulation circuit having a hot water supply heat exchanger, and a discharge circuit having an opening / closing valve for opening and closing a flow path for discharging bathtub water from the bathtub water circuit to the outside of the system,The bath heat exchanger evaporates the refrigerant of the heat pump circuit to heat the bath water. After the release, the on-off valve is opened to release the bath water from the bottom of the bath to the outside of the system, and after the release, the on-off valve is closed to recover the heat of the bath water.A heat pump bath water heater can be implemented.
[0014]
And discharge | release of low temperature bathtub water out of a system from a discharge circuit can suppress formation of temperature distribution that the temperature of the bottom part of a bathtub is low and the temperature of an upper layer part is high.
[0015]
Moreover, the heat pump circuit which has a compressor as described in Claim 2, the bathtub water circulation circuit which has the bath heat exchanger with which the refrigerant | coolant of the said heat pump circuit and bathtub water exchange heat, the refrigerant | coolant of the said heat pump circuit, and hot water supply water are heat A hot water supply circuit having a hot water supply heat exchanger to be exchanged, and a discharge circuit having an opening / closing valve for opening and closing a flow path for discharging bathtub water from the bathtub to the outside of the systemAnd collecting the heat of the bath water by evaporating the refrigerant of the heat pump circuit in the bath heat exchanger, and then opening the on-off valve to release the bath water from the lower portion of the bath to the outside of the system, and opening and closing after the release Close the valve to recover heat from the bath waterIt can be a heat pump bath water heater.
[0016]
And discharge | release of low temperature bathtub water out of a system from a discharge circuit can suppress formation of temperature distribution that the temperature of the bottom part of a bathtub is low and the temperature of an upper layer part is high.
[0017]
Further, as described in claim 3When the bathtub water circulation circuit or the bathtub is equipped with a temperature sensor that detects the temperature of the bathtub water, the refrigerant of the heat pump circuit is evaporated by the bath heat exchanger to recover the bathtub water heat,A heat pump bath water heater having a function of opening the on-off valve for a predetermined time when the temperature detected by the temperature sensor is equal to or lower than a predetermined temperature, and discharging the bath water of the bath water circulation circuit from the discharge circuit to the outside of the system; can do.
[0018]
And discharge | release of low temperature bathtub water out of a system from a discharge circuit can suppress formation of temperature distribution that the temperature of the bottom part of a bathtub is low and the temperature of an upper layer part is high.
[0019]
Further, as described in claim 4When the bathtub water circulation circuit or the bathtub is equipped with a temperature sensor that detects the temperature of the bathtub water and the bath heat exchanger evaporates the refrigerant of the heat pump circuit to recover the bathtub water heat,When the detected temperature of the temperature sensor becomes a predetermined temperature or lower, the on-off valve is opened, and the bathtub water of the bathtub water circuit is discharged out of the system from the discharge circuit, and then the detected temperature of the temperature sensor is higher than the predetermined temperature. A heat pump bath water heater can be provided with a function of closing the on-off valve when the temperature is higher than the bath upper layer temperature.
[0020]
And discharge | release of low temperature bathtub water out of a system from a discharge circuit can suppress formation of temperature distribution that the temperature of the bottom part of a bathtub is low and the temperature of an upper layer part is high.
[0021]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0022]
Example 1
FIG. 1 relates to Example 1 of the present invention and schematically shows the configuration of the present invention. The heat pump hot water supply apparatus of the present embodiment includes a compressor 1, an expansion valve 2, a refrigerant circuit 3, a hot water supply heat exchanger 4, a hot water supply circuit 5, a hot water supply tank 6, a bath heat exchanger 7, a bathtub water circulation circuit 8, and a bathtub water circulation. It is the same as the conventionally well-known heat pump hot water supply apparatus shown in FIG. 13 in that the pump 9, the bathtub 10, and the bath adapter 11 are provided. The present embodiment is characterized in that the discharge circuit 12, the on-off valve 13 for opening and closing the discharge circuit 12, and the control means 14 are provided. The on-off valve 13 is composed of an electromagnetic valve, a valve, or the like.
[0023]
Next, the operation and action will be described. When heating the hot water supply using the temperature of the bathtub water in the bathtub 10, the same operation as in the conventional example is performed. Therefore, a low-temperature layer of bathtub water as shown in FIG. When the low-temperature bath water flows into the bath water circulation circuit 8 again, the heat pump efficiency is lowered, so that the controller 14 performs the operation shown in FIG. After the operation of the compressor 1 has passed a predetermined operation time, the on-off valve 13 is opened, and the bathtub water is allowed to flow out of the system from the discharge circuit 12. After opening the on-off valve 13 for a predetermined time, the on-off valve 13 is closed again to stop the outflow of bath water from the system. Thus, the following operation | movement works by opening and closing the on-off valve 13 intermittently. That is, the low temperature layer of the bath water formed in the bathtub 10 is discharged out of the system through the discharge circuit 12 when the on-off valve 13 is open. When the low temperature layer of the bath water is discharged out of the system, the water level of the bath is lowered, so that the bath water having a relatively high temperature in the upper layer of the bath flows into the bath water circulation circuit 8. At this time, the efficiency of the heat pump is increased. When the low temperature layer is formed again in the bathtub 10 and the efficiency of the heat pump is lowered, the on-off valve 13 is opened, the low temperature layer of the bathtub water is discharged out of the system, the water level of the bathtub is lowered, and the temperature of the upper layer of the bathtub is relatively high. The bathtub water flows into the bathtub water circulation circuit 8.
[0024]
The predetermined time until the on-off valve 13 is opened is the time until a low-temperature layer of the bath water is formed in the bathtub 10 and the efficiency of the heat pump is reduced. The time until the bathtub water having a relatively high temperature in the upper layer flows into the bathtub water circulation circuit 8 was used.
[0025]
The time until the on-off valve 13 is opened may be before the heat pump efficiency is lowered, and the time during which the on-off valve 13 is opened may be the time until a predetermined amount of bath water is released.
[0026]
Further, in this embodiment, the discharge circuit 12 is provided as an example in which the bathtub water is provided from the bathtub 10 to the bathtub water circulation pump 9, but the discharge circuit 12 is installed at any position of the bathtub water circulation circuit 8. Good. Furthermore, in this embodiment, the bath water is discharged while the heat pump is operated, but the compressor 1 is stopped and only the circulation pump is operated, or the apparatus is completely stopped. You may let them.
[0027]
In this embodiment, the on-off valve 13 is intermittently opened and closed to discharge the bath water. However, the same effect can be obtained by opening the on-off valve 13 and continuously discharging the bath water. It is done.
[0028]
(Example 2)
FIG. 3 relates to the second embodiment of the present invention. The configuration of the present invention is obtained by adding a temperature sensor 15 and control means 16 to the configuration of the first embodiment shown in FIG. Although a thermistor is used for the temperature sensor 15, a thermocouple, a resistance temperature detector, or the like may be used.
[0029]
Next, the operation and action will be described. When heating the hot water supply using the temperature of the bathtub water in the bathtub 10, the same operation as in the conventional example is performed. Therefore, a low-temperature layer of bathtub water as shown in FIG. When the low-temperature bath water flows into the bath water circulation circuit 8 again, the heat pump efficiency is lowered, so that the control means 16 performs the operation shown in FIG. When the temperature detected by the temperature sensor 15 becomes equal to or lower than T1, the on-off valve 13 is opened, and the bathtub water is allowed to flow out of the system from the discharge circuit 12. After opening the on-off valve 13 for a predetermined time a, the on-off valve 13 is closed again to stop the outflow of bath water from the system. By opening and closing the on-off valve 13 as described above, the following operation is performed. When a low temperature layer having a temperature of the bathtub 10 equal to or lower than T1 flows into the bathtub water circulation circuit 8, the on-off valve 13 is opened and discharged to the outside through the discharge circuit 12. When the on-off valve 13 is opened for a predetermined time a, the low temperature layer of the bath water is discharged out of the system, and the water level of the bath falls, so that the bath water having a relatively high temperature in the upper layer of the bath flows into the bath water circulation circuit 8. become. At this time, the efficiency of the heat pump is increased. When the low temperature layer is formed again in the bathtub 10 and the temperature detected by the temperature sensor 15 is equal to or lower than T1, the on-off valve 13 is opened to discharge the low temperature layer of the bath water out of the system, and the water level of the bath is lowered and the upper layer of the bathtub The relatively high temperature bathtub water flows into the bathtub water circulation circuit 8.
[0030]
The predetermined time “a” during which the on-off valve 13 is opened is the time until the water level of the bathtub is lowered and the bathtub water having a relatively high temperature in the bathtub upper layer flows into the bathtub water circulation circuit 8.
[0031]
In addition, it is good also considering the time until the on-off valve 13 is open as time until a predetermined amount of bathtub water is discharge | released.
[0032]
Moreover, in this embodiment, the discharge circuit 12 is provided as an example in which the bathtub water is provided from the bathtub 10 to the bathtub water circulation pump 9, but the discharge circuit 12 may be installed at any position of the bathtub water circulation circuit 8. . Furthermore, in this embodiment, the bath water is discharged while the heat pump is operated, but the compressor 1 is stopped and only the circulation pump is operated, or the apparatus is completely stopped. You may let them.
[0033]
Moreover, although the temperature sensor 15 was arrange | positioned in the position shown in FIG. 3, the other position in the bathtub water circulation circuit 8 or the position in the bathtub 10 may be sufficient.
[0034]
(Example 3)
FIG. 5 relates to a third embodiment of the present invention. The configuration of the present invention is obtained by adding a temperature sensor 15 and a control means 17 to the configuration of the first embodiment shown in FIG. Although a thermistor is used for the temperature sensor 15, a thermocouple, a resistance temperature detector, or the like may be used.
[0035]
Next, the operation and action will be described. When heating the hot water supply using the temperature of the bathtub water in the bathtub 10, the same operation as in the conventional example is performed. Therefore, a low-temperature layer of bathtub water as shown in FIG. When the low-temperature bath water flows into the bath water circulation circuit 8 again, the heat pump efficiency is lowered, so that the operation as shown in FIG. When the temperature detected by the temperature sensor 15 becomes equal to or lower than T2, the on-off valve 13 is opened, and the bath water flows out of the system from the discharge circuit 12. Thereafter, when the detected temperature of the temperature sensor 15 becomes equal to or higher than T3, the on-off valve 13 is closed to stop the bath water from flowing out of the system. By opening and closing the on-off valve 13 as described above, the following operation is performed. When a low temperature layer having a temperature of the bathtub 10 equal to or lower than T2 flows into the bathtub water circulation circuit 8, the on-off valve 13 is opened and discharged to the outside through the discharge circuit 12. When the on-off valve 13 is opened, the water level of the bathtub is lowered, so that the bathtub water having a relatively high temperature in the upper layer of the bathtub flows into the bathtub water circulation circuit 8. At this time, the efficiency of the heat pump is increased. Since the predetermined temperature T3 is set to the bathtub upper layer temperature, when the bathtub water in the bathtub upper layer flows into the bathtub water circulation circuit 8, the on-off valve 13 is closed. When the low temperature layer is formed in the bathtub 10 again and the temperature detected by the temperature sensor 15 becomes T2 or less, the on-off valve 13 is opened to discharge the low temperature layer of the bath water out of the system, and the water level of the bath falls and the upper layer of the bathtub The relatively high temperature bathtub water flows into the bathtub water circulation circuit 8.
[0036]
In this embodiment, the discharge circuit 12 is provided as an example in which the bathtub water is provided from the bathtub 10 to the bathtub water circulation pump 9. However, the discharge circuit 12 may be installed at any position of the bathtub water circulation circuit 8. . Furthermore, in this embodiment, the bath water is discharged while the heat pump is operated, but the compressor 1 is stopped and only the circulation pump is operated, or the apparatus is completely stopped. You may do it.
[0037]
Moreover, although the temperature sensor 15 was arrange | positioned in the position shown in FIG. 5, the other position in the bathtub water circulation circuit 8 or the position in the bathtub 10 may be sufficient.
[0038]
Example 4
FIG. 7 relates to Example 4 of the present invention and schematically shows the configuration of the present invention. The heat pump hot water supply apparatus of the present embodiment includes a compressor 1, an expansion valve 2, a refrigerant circuit 3, a hot water supply heat exchanger 4, a hot water supply circuit 5, a hot water supply tank 6, a bath heat exchanger 7, a bathtub water circulation circuit 8, and a bathtub water circulation. A pump 9, a bathtub 10, a bath adapter 11, a discharge circuit 18 at the bottom of the bathtub, an opening / closing valve 19 for opening and closing the discharge circuit 18, and a control means 20 are provided. The on-off valve 13 is composed of an electromagnetic valve, a valve, or the like.
[0039]
Next, the operation and action will be described. When heating the hot water supply using the temperature of the bathtub water in the bathtub 10, the same operation as in the conventional example is performed. Therefore, a low-temperature layer of bathtub water as shown in FIG. When the low-temperature bath water flows into the bath water circulation circuit 8 again, the heat pump efficiency is lowered, so that the control means 20 performs an operation as shown in FIG. After the operation of the compressor 1 has passed a predetermined operation time, the on-off valve 19 is opened, and the bath water is allowed to flow out of the system from the discharge circuit 18. After opening the on-off valve 19 for a predetermined time, the on-off valve 19 is closed again to stop the outflow of bath water from the system. Thus, the following operation | movement works by opening and closing the on-off valve 19 intermittently. The low temperature layer formed in the bathtub 10 is discharged out of the system through the discharge circuit 19 when the on-off valve 18 is open. When the low temperature layer of the bath water is discharged out of the system, the water level of the bath is lowered, so that the bath water having a relatively high temperature in the upper layer of the bath flows into the bath water circulation circuit 8. At this time, the efficiency of the heat pump is increased. When the low temperature layer is formed again in the bathtub 10 and the efficiency of the heat pump is lowered, the on-off valve 19 is opened to release the low temperature layer of the bath water out of the system, the water level of the bathtub is lowered, and the temperature of the upper layer of the bathtub is relatively high. The bathtub water flows into the bathtub water circulation circuit 8.
[0040]
The predetermined time until the on-off valve 19 is opened is the time until a low-temperature layer is formed in the bathtub and the efficiency of the heat pump is reduced, and the predetermined time for opening the on-off valve 19 is a comparison between the bathtub upper layer and the water level of the bathtub. It was set as time until bathtub water with high target temperature flows into bathtub water circulation circuit 8.
[0041]
The time until the on-off valve 19 is opened may be before the heat pump efficiency is lowered, and the time during which the on-off valve 19 is open may be the time until a predetermined amount of bath water is released.
[0042]
Furthermore, in this embodiment, the bath water is discharged while the heat pump is operated, but the compressor 1 is stopped and only the circulation pump is operated, or the apparatus is completely stopped. You may let them.
[0043]
Moreover, in the example which discharges bathtub water out of the system from the bathtub circulation circuit 8, the low temperature layer from the bathtub bottom to the bath adapter 11 could not be discharged, but in this embodiment, the bathtub water is discharged from the bathtub bottom. Therefore, the low temperature layer of bath water can be discharged out of the system more completely.
[0044]
Furthermore, since the amount of circulating water in the bathtub water circulation circuit 8 is not affected, the heat pump cycle is also stabilized.
[0045]
In the present embodiment, the on-off valve 13 is intermittently opened and closed to discharge the bath water. However, the on-off valve 13 may be opened to continuously discharge the bath water.
[0046]
(Example 5)
FIG. 9 relates to the fifth embodiment of the present invention. The configuration of the present invention is obtained by adding a temperature sensor 21 and a control means 22 to the configuration of the fourth embodiment of FIG. Although the thermistor is used for the temperature sensor 21, a thermocouple, a resistance temperature detector, or the like may be used.
[0047]
Next, the operation and action will be described. When heating the hot water supply using the temperature of the bathtub water in the bathtub 10, the same operation as in the conventional example is performed. Therefore, a low-temperature layer of bathtub water as shown in FIG. When the low-temperature bath water flows into the bath water circulation circuit 8 again, the heat pump efficiency is lowered, so that the control means 22 performs the operation shown in FIG. When the temperature detected by the temperature sensor 21 becomes T4 or less, the on-off valve 19 is opened, and the bathtub water is discharged from the discharge circuit 18 to the outside of the system. After opening the on-off valve 19 for a predetermined time b, the on-off valve 19 is closed again to stop the bath water from flowing out of the system. The opening / closing of the opening / closing valve 19 has the following effects. When a low temperature layer having a temperature of T4 or lower in the bathtub 10 flows into the bathtub water circulation circuit 8, the on-off valve 19 is opened and discharged to the outside through the discharge circuit 18.
[0048]
If the on-off valve 19 is opened for a predetermined time b, the low temperature layer of the bath water is discharged out of the system, and the water level of the bath falls, so that the bath water having a relatively high temperature in the upper layer of the bath flows into the bath water circulation circuit 8. become. At this time, the efficiency of the heat pump is increased. When the low temperature layer is formed again in the bathtub 10 and the temperature detected by the temperature sensor 21 becomes T4 or lower, the on-off valve 19 is opened to discharge the low temperature layer of the bath water out of the system, and the water level of the bathtub is lowered to lower the upper layer of the bathtub. The relatively high temperature bathtub water flows into the bathtub water circulation circuit 8.
[0049]
The predetermined time b during which the on-off valve 19 is opened is the time until the water level of the bathtub is lowered and the bathtub water having a relatively high temperature in the bathtub upper layer flows into the bathtub water circulation circuit 8.
[0050]
In addition, it is good also considering the time until the on-off valve 19 is open as time until a predetermined amount of bathtub water is discharge | released.
[0051]
In this embodiment, the bath water is discharged while the heat pump is operated. However, the compressor 1 is stopped and only the circulation pump is operated, or the apparatus is discharged while the apparatus is completely stopped. Also good.
[0052]
Moreover, in the example which discharges bathtub water out of the system from the bathtub circulation circuit 8, the low temperature layer from the bathtub bottom to the bath adapter 11 could not be discharged, but since it discharges from the bathtub bottom in this embodiment, The low temperature layer of bath water can be completely discharged out of the system.
[0053]
Furthermore, since the amount of circulating water in the bathtub water circulation circuit 8 is not affected, the heat pump cycle is also stabilized.
[0054]
Moreover, although the temperature sensor 21 was arrange | positioned in the position shown in FIG. 9, the other position in the bathtub water circulation circuit 8 or the position in the bathtub 10 may be sufficient.
[0055]
(Example 6)
FIG. 11 relates to the sixth embodiment of the present invention. The configuration of the present invention is obtained by adding a temperature sensor 21 and a control means 23 to the configuration of the fourth embodiment shown in FIG. Although the thermistor is used for the temperature sensor 21, a thermocouple, a resistance temperature detector, or the like may be used.
[0056]
Next, the operation and action will be described. When heating the hot water supply using the temperature of the bathtub water in the bathtub 10, the same operation as in the conventional example is performed. Therefore, a low-temperature layer of bathtub water as shown in FIG. When the low-temperature bath water flows into the bath water circulation circuit 8 again, the heat pump efficiency is lowered, so that the controller 23 performs the operation shown in FIG. That is, when the temperature detected by the temperature sensor 21 is equal to or lower than T5, the on-off valve 19 is opened, and the bathtub water flows out of the system from the discharge circuit 18. After that, when the temperature detected by the temperature sensor 21 is equal to or higher than T6, the on-off valve 19 is closed to stop the bath water from flowing out of the system. The opening / closing of the opening / closing valve 19 has the following effects. When a low temperature layer having a temperature of the bath 10 of T5 or less flows into the bath water circulation circuit 8, the on-off valve 19 opens and is discharged out of the system through the discharge circuit 18. When the on-off valve 19 is opened, the water level of the bathtub is lowered, so that the bathtub water having a relatively high temperature in the upper layer of the bathtub flows into the bathtub water circulation circuit 8. At this time, the efficiency of the heat pump is increased. Since the predetermined temperature T6 is set to the bathtub upper layer temperature, when the bathtub water in the bathtub upper layer flows into the bathtub water circulation circuit 8, the on-off valve 19 is closed. When the low temperature layer is formed again in the bathtub 10 and the temperature detected by the temperature sensor 21 is T5 or less, the on-off valve 19 is opened to discharge the low temperature layer of the bath water out of the system, and the water level of the bathtub is lowered to lower the upper layer of the bathtub. The relatively high temperature bathtub water flows into the bathtub water circulation circuit 8.
[0057]
In this embodiment, the bath water is discharged while operating the heat pump, but the compressor 1 may be stopped and only the circulation pump may be operated, or the apparatus may be discharged in a state where the apparatus is completely stopped. .
[0058]
Moreover, in the example which discharges bathtub water from the bathtub circulation circuit 8, the low temperature layer from the bathtub bottom part to the bath adapter 11 could not be discharged, but in this embodiment, since bathtub water is discharged from the bathtub bottom part, the bathtub is more completely removed. The low temperature layer of water can be discharged out of the system.
[0059]
Furthermore, since the amount of circulating water in the bathtub water circulation circuit 8 is not affected, the heat pump cycle is also stabilized.
[0060]
Moreover, although the temperature sensor 21 was arrange | positioned in the position shown in FIG.
[0061]
As described above, the following effects can be obtained in the heat pump water heater of the present invention.
[0062]
(1)Hot water supply having a heat pump circuit having a compressor, a bath water circulation circuit having a bath heat exchanger for exchanging heat between the refrigerant of the heat pump circuit and bath water, and a hot water supply heat exchanger for exchanging heat between the refrigerant of the heat pump circuit and hot water supply A water circuit, and a discharge circuit having an open / close valve for opening and closing a flow path for discharging bath water from the bathtub water circulation circuit to the outside of the system, and evaporating the refrigerant of the heat pump circuit in the bath heat exchanger After recovering the heat of water, the on-off valve is opened to release the bath water from the lower part of the bath to the outside of the system, and after the release, the on-off valve is closed to recover the heat of the bath water.Therefore, even when a hot water supply heating operation is performed using the hot water of the bath water, even if a low temperature layer of the bath water that is disadvantageous to the operation efficiency is formed at the bottom of the bath water, the discharge circuit installed in the bath water circulation circuit The low temperature layer can be discharged out of the system.
[0063]
Therefore, the temperature of the bath water can be effectively used for heating the hot water supply. Furthermore, high efficiency of the apparatus is realized.
[0064]
(2)Hot water supply having a heat pump circuit having a compressor, a bath water circulation circuit having a bath heat exchanger for exchanging heat between the refrigerant of the heat pump circuit and bath water, and a hot water supply heat exchanger for exchanging heat between the refrigerant of the heat pump circuit and hot water supply A water circuit and a discharge circuit having an opening / closing valve for opening and closing a flow path for discharging the bath water from the bathtub to the outside of the bath, and evaporating the refrigerant of the heat pump circuit in the bath heat exchanger to evaporate the bath water After recovering the heat, the on-off valve is opened to release the bathtub water from the bottom of the bathtub to the outside of the system, and after the release, the on-off valve is closed to recover the heat of the bath water.Therefore, even when a hot water supply heating operation is performed using the hot water of the bathtub water, even if a low temperature layer of the bath water that is disadvantageous to the operation efficiency is formed at the bottom of the bathtub, this low temperature layer is removed from the discharge circuit installed in the bathtub. Can be discharged out of the system.
[0065]
Therefore, the temperature of the bath water can be effectively used for heating the hot water supply. Furthermore, high efficiency of the apparatus is realized.
[0066]
Moreover, since bathtub water is discharged | emitted from the bathtub bottom part, the low temperature layer of a bathtub can be discharged | emitted completely, Furthermore, since the amount of bathtub water circulation is not affected, the stability and performance of an apparatus improve.
[0067]
(3)There is a temperature sensor that detects the temperature of the bathtub water in the bathtub water circulation circuit or in the bathtub. When recovering the heat of the bath water by evaporating the refrigerant of the heat pump circuit with Lu heat exchanger, by opening the on-off valve for a predetermined time when the detection temperature of the temperature sensor becomes below a predetermined temperature,When the hot water heating operation is performed using the hot water of the bathtub water, even if a low temperature layer of the bath water that is disadvantageous to the operation efficiency is formed at the bottom of the bathtub, this low temperature layer is removed from the discharge circuit installed in the bathtub water circulation circuit. It can be discharged out of the system.
[0068]
Therefore, the temperature of the bath water can be effectively used for heating the hot water supply. Furthermore, high efficiency of the apparatus is realized.
[0069]
Moreover, since bathtub water is discharged | emitted based on a temperature sensor, low temperature bathtub water can be discharged | emitted correctly irrespective of the magnitude | size and bathtub water level of a bathtub. Therefore, the performance and workability of the apparatus are improved.
[0070]
Since the temperature sensor can detect the temperature of the bathtub and the system abnormality, a more reliable heat pump bath water heater can be constructed.
[0071]
(4)When a temperature sensor that detects the temperature of the bathtub water is provided in the bathtub water circulation circuit or in the bathtub, and the heat of the bathtub water is recovered by evaporating the refrigerant of the heat pump circuit using the bath heat exchanger, the temperature sensor detects the predetermined temperature. Open the on-off valve when the temperature falls below, and close the on-off valve when the temperature detected by the temperature sensor exceeds a predetermined temperature.When the hot water heating operation is performed using the hot water of the bath water, even if a low temperature layer of bath water that is disadvantageous to the operation efficiency is formed at the bottom of the bath, this low temperature is released from the discharge circuit installed in the bath water circulation circuit. The layer can be discharged out of the system.
[0072]
Therefore, the temperature of the bath water can be effectively used for heating the hot water supply. Furthermore, high efficiency of the apparatus is realized.
[0073]
Moreover, since bathtub water is discharged | emitted based on a temperature sensor, low temperature bathtub water can be discharged | emitted correctly irrespective of the magnitude | size and bathtub water level of a bathtub. Therefore, the performance and workability of the apparatus are improved.
[0074]
Since the temperature sensor can detect the temperature of the bathtub and the system abnormality, a more reliable heat pump bath water heater can be constructed.
[0075]
【The invention's effect】
As described above, according to the heat pump type hot water supply system of the present invention, when the hot water heating operation is performed using the temperature of the bath water, a low temperature layer of the bath water that is disadvantageous in operation efficiency is formed at the bottom of the bath. However, this low temperature layer can be discharged out of the system from the discharge circuit installed in the bathtub water circulation circuit.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a heat pump bath water heater in Embodiment 1 of the present invention.
FIG. 2 is a diagram showing the relationship between the bathtub water level, the bathtub water circulation temperature, and the operation of the opening / closing valve of the discharge circuit.
FIG. 3 is a configuration diagram of a heat pump bath water heater in Embodiment 2 of the present invention.
FIG. 4 is a diagram showing the relationship among the bathtub water level, the bathtub water circulation temperature, and the operation of the opening / closing valve of the discharge circuit.
FIG. 5 is a configuration diagram of a heat pump bath water heater in Embodiment 3 of the present invention.
FIG. 6 is a diagram showing the relationship among the bathtub water level, the bathtub water circulation temperature, and the operation of the opening / closing valve of the discharge circuit.
FIG. 7 is a configuration diagram of a heat pump bath water heater in Embodiment 4 of the present invention.
FIG. 8 is a view showing the relationship among the bathtub water level, the bathtub water circulation temperature, and the operation of the opening / closing valve of the discharge circuit.
FIG. 9 is a configuration diagram of a heat pump bath water heater in Embodiment 5 of the present invention.
FIG. 10 is a diagram showing the relationship between the bathtub water level, the bathtub water circulation temperature, and the operation of the on-off valve of the discharge circuit.
FIG. 11 is a configuration diagram of a heat pump bath water heater in Embodiment 6 of the present invention.
FIG. 12 is a diagram showing the relationship among the bathtub water level, the bathtub water circulation temperature, and the operation of the on-off valve of the discharge circuit.
FIG. 13 is a configuration diagram of a conventional heat pump bath water heater.
FIG. 14 is a view showing the state of the bath water temperature.
[Explanation of symbols]
1 Compressor
2 Expansion valve
3 Refrigerant circuit
4 Hot water supply heat exchanger
5 Hot water supply circuit
7 Bath heat exchanger
8 Bath water circulation circuit
9 Bath water circulation pump
10 Bathtub
11 Bath adapter
12, 18 Emission circuit
13, 19 On-off valve
14, 16, 17, 20, 22, 23 Control means
15, 21 Temperature sensor

Claims (4)

圧縮機を有するヒートポンプ回路と、前記ヒートポンプ回路の冷媒と浴槽水が熱交換する風呂熱交換器を有する浴槽水循環回路と、前記ヒートポンプ回路の冷媒と給湯水が熱交換する給湯熱交換器を有する給湯水回路と、前記浴槽水循環回路から浴槽水を系外へ放出する流路を開閉するための開閉弁を有する放出回路とを備え、前記風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収した後、前記開閉弁を開放して前記浴槽水を浴槽下部から系外へ放出し、放出後前記開閉弁を閉じて浴槽水の熱を回収することを特徴とするヒートポンプ風呂給湯機。Hot water supply having a heat pump circuit having a compressor, a bath water circulation circuit having a bath heat exchanger for exchanging heat between the refrigerant of the heat pump circuit and bath water, and a hot water supply heat exchanger for exchanging heat between the refrigerant of the heat pump circuit and hot water supply A water circuit, and a discharge circuit having an open / close valve for opening and closing a flow path for discharging bath water from the bathtub water circulation circuit to the outside of the system, and evaporating the refrigerant of the heat pump circuit in the bath heat exchanger After recovering the heat of water, the on-off valve is opened to release the bath water from the lower part of the bath to the outside of the system, and after the release, the on-off valve is closed to recover the heat of the bath water. Water heater. 圧縮機を有するヒートポンプ回路と、前記ヒートポンプ回路の冷媒と浴槽水が熱交換する風呂熱交換器を有する浴槽水循環回路と、前記ヒートポンプ回路の冷媒と給湯水が熱交換する給湯熱交換器を有する給湯水回路と、前記浴槽から浴槽水を系外へ放出する流路を開閉するための開閉弁を有する放出回路とを備え、前記風呂熱交換器で前記ヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収した後、前記開閉弁を開放して前記浴槽水を浴槽下部から系外へ放出し、放出後前記開閉弁を閉じて浴槽水の熱を回収することを特徴とするヒートポンプ風呂給湯機。Hot water supply having a heat pump circuit having a compressor, a bath water circulation circuit having a bath heat exchanger for exchanging heat between the refrigerant of the heat pump circuit and bath water, and a hot water supply heat exchanger for exchanging heat between the refrigerant of the heat pump circuit and hot water supply A water circuit and a discharge circuit having an opening / closing valve for opening and closing a flow path for discharging the bath water from the bathtub to the outside of the bath, and evaporating the refrigerant of the heat pump circuit in the bath heat exchanger to evaporate the bath water After recovering heat, the on-off valve is opened to release the bath water from the bottom of the bath to the outside of the system, and after the release, the on-off valve is closed to recover the heat of the bath water. . 浴槽水循環回路または浴槽内に浴槽水の温度を検知する温度センサーを備え、風呂熱交換器でヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収する場合、前記温度センサーの検知温度が所定温度以下になったら前記開閉弁を所定の時間だけ開く請求項１または２に記載のヒートポンプ風呂給湯機。 When a temperature sensor that detects the temperature of the bathtub water is provided in the bathtub water circulation circuit or in the bathtub, and the heat of the bathtub water is recovered by evaporating the refrigerant of the heat pump circuit with the bath heat exchanger, the detected temperature of the temperature sensor is a predetermined temperature. The heat pump bath water heater according to claim 1 or 2, wherein the on-off valve is opened only for a predetermined time when it becomes below . 浴槽水循環回路または浴槽内に浴槽水の温度を検知する温度センサーを備え、風呂熱交換器でヒートポンプ回路の冷媒を蒸発させて浴槽水の熱を回収する場合、前記温度センサーの検知温度が所定温度以下になったら前記開閉弁を開き、前記温度センサーの検知温度が所定温度以上になったら前記開閉弁を閉じる請求項１または２に記載のヒートポンプ風呂給湯機。 When a temperature sensor that detects the temperature of the bathtub water is provided in the bathtub water circulation circuit or in the bathtub, and the heat of the bathtub water is recovered by evaporating the refrigerant of the heat pump circuit with the bath heat exchanger, the detected temperature of the temperature sensor is a predetermined temperature. The heat pump bath water heater according to claim 1 or 2, wherein the on-off valve is opened when the temperature becomes below, and the on-off valve is closed when a temperature detected by the temperature sensor becomes equal to or higher than a predetermined temperature .
JP16313398A 1998-06-11 1998-06-11 Heat pump bath water heater Expired - Fee Related JP3632445B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16313398A JP3632445B2 (en) 1998-06-11 1998-06-11 Heat pump bath water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16313398A JP3632445B2 (en) 1998-06-11 1998-06-11 Heat pump bath water heater

Publications (2)

Publication Number Publication Date
JPH11351666A JPH11351666A (en) 1999-12-24
JP3632445B2 true JP3632445B2 (en) 2005-03-23

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ID=15767831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16313398A Expired - Fee Related JP3632445B2 (en) 1998-06-11 1998-06-11 Heat pump bath water heater

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Country Link
JP (1) JP3632445B2 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0827079B2 (en) * 1983-10-13 1996-03-21 ダイキン工業株式会社 Heat pump bath water heating / cooling device
JP2681462B2 (en) * 1986-06-25 1997-11-26 株式会社 竹中工務店 Remaining hot water exhaust heat recovery system with automatic drainage mechanism
JP2871022B2 (en) * 1990-07-18 1999-03-17 松下電器産業株式会社 Bathroom equipment
JP2838840B2 (en) * 1990-10-03 1998-12-16 高木産業株式会社 External water injection system and its water injection method
JPH04190041A (en) * 1990-11-26 1992-07-08 Matsushita Electric Ind Co Ltd Bath tub hot water feeding device
JPH05322301A (en) * 1992-05-19 1993-12-07 Matsushita Electric Ind Co Ltd Bath
JP2830789B2 (en) * 1995-09-05 1998-12-02 三菱電機株式会社 Bathtub waste heat recovery equipment
JPH09159267A (en) * 1995-12-05 1997-06-20 Brother Ind Ltd Circulation bath apparatus
JPH1089713A (en) * 1996-09-13 1998-04-10 Paloma Ind Ltd Bath heater hot water supply apparatus with bathroom heating function

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