JP3588948B2

JP3588948B2 - Heat pump type bath hot water supply system

Info

Publication number: JP3588948B2
Application number: JP33928596A
Authority: JP
Inventors: 竹司渡辺; 寛明米久保
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1996-12-19
Filing date: 1996-12-19
Publication date: 2004-11-17
Anticipated expiration: 2016-12-19
Also published as: JPH10185312A

Description

【０００１】
【発明の属する技術分野】
本発明はヒートポンプによる風呂給湯システムに関する。
【０００２】
【従来の技術】
従来、この種のヒートポンプシステムは特開平７−７１８３９号公報に示す如きものがある。以下、従来の技術について図面に基づき説明する。図１４は従来のヒートポンプシステムの構成図である。図１４において、圧縮機１の吐出側につながる高圧ガス管１ａ、圧縮機１の吸入側につながる低圧ガス管１ｂ、高圧および低圧ガス管とともに配置された液管１ｃに開閉弁５６ａ、５６ｂ、５６ｃ、５６ｄ、５６ｅ、５６ｆを介して、給湯加熱器２、排熱利用熱交換器４、大気熱利用熱交換器５５が並列につながるよう構成されている。また、開閉弁５６ａ、５６ｂ、５６ｃ、５６ｄ、５６ｅ、５６ｆの切り替えにより給湯運転、風呂追い焚き運転、給湯熱利用風呂追い焚き運転、浴槽排熱利用給湯運転がおこなわれる。例えば、浴槽排熱利用給湯運転時は、開閉弁５６ａと５６ｄを開放して、排熱利用熱交換器４を介して浴槽８の湯を吸熱し、給湯加熱器２で加熱して貯湯する。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来のヒートポンプシステムでは、給湯加熱器２より流出した高圧液冷媒は冷媒流量制御弁５７で低圧の二相冷媒となり、さらに冷媒流量制御弁５８を通って排熱利用熱交換器４に流入することになる。よって、冷媒流量がかなり絞られるため、所定の冷媒流量が得られず、圧縮機１の吸入冷媒ガスは低圧の過熱ガスとなる。そのため、排熱利用熱交換器４での採熱量が少なくなり、高効率化が得られない。さらに、圧縮比が大きいため、高温化が得られない。
【０００４】
本発明は上記課題を解決するもので、浴槽排熱利用給湯運転時に高温化沸き上げをして貯湯熱量増大をはかることを主目的とするものである。
【０００５】
【課題を解決するための手段】
前記課題を解決するため本発明は、圧縮機を有する冷媒回路と、前記冷媒回路に接続した給湯加熱器および排熱利用熱交換器と、貯湯槽の湯水が流動し、前記給湯加熱器と熱交換関係を有する給湯熱交換器を途中に接続した給湯回路と、風呂循環ポンプを介して浴槽の湯水を循環させるとともに、前記排熱利用熱交換器と熱交換関係を有する風呂熱交換器を途中に接続した風呂循環回路と、前記給湯熱交換器の水出口温度を検出する給湯温度検知手段と、前記風呂循環回路の水温を検出する風呂温度検知手段と、前記風呂温度検知手段の信号を受けて前記給湯熱交換器の水出口湯温を設定する湯温設定手段とを備え、前記湯温設定手段の信号と前記給湯温度検知手段の信号に基づき前記給湯回路の流量制御をおこなうヒートポンプ式風呂給湯システムである。
【０００６】
以上の構成によれば、浴槽排熱利用給湯運転において、風呂循環回路の水温を検出して、所定温度よりも高温の場合には給湯熱交換器出口温度の設定を高くして、給湯温度が湯温設定温度となるように流量制御を行うため、浴槽残湯温度が高い。特に入浴終了直後の運転時などは沸き上げ温度を高めて貯湯できることになり、貯湯熱量が増加する。特に給湯負荷が大きく、外気温度が低い冬季においては効果が大きい。
【０００７】
【発明の実施の形態】
前記課題を解決するため、圧縮機を有する冷媒回路と、前記冷媒回路に接続した給湯加熱器および排熱利用熱交換器と、貯湯槽の湯水が流動し、前記給湯加熱器と熱交換関係を有する給湯熱交換器を途中に接続した給湯回路と、風呂循環ポンプを介して浴槽の湯水を循環させるとともに、前記排熱利用熱交換器と熱交換関係を有する風呂熱交換器を途中に接続した風呂循環回路と、前記給湯熱交換器の水出口温度を検出する給湯温度検知手段と、前記風呂循環回路の水温を検出する風呂温度検知手段と、前記風呂温度検知手段の信号を受けて前記給湯熱交換器の水出口湯温を設定する湯温設定手段とを備え、前記湯温設定手段の信号と前記給湯温度検知手段の信号に基づき前記給湯回路の流量制御をおこなうものである。浴槽排熱利用の給湯運転において、圧縮機から吐出した高温高圧のガス冷媒は給湯加熱器に流入する。一方、貯湯槽の水は給湯循環ポンプによって給湯熱交換器に流入し、ここで、冷媒の凝縮熱によって給湯加熱器を介して加熱されて貯湯槽に流入する。また、凝縮液化した冷媒は減圧装置で減圧されて排熱利用熱交換器に流入する。一方、浴槽の残湯は風呂循環ポンプによって風呂熱交換器に流入し、ここで風呂熱交換器を介して排熱利用熱交換器を流れる冷媒を蒸発ガス化させる。その際に、風呂循環回路の水温を風呂温度検知手段が検出して、その信号が所定温度よりも高温の信号の場合には湯温設定手段は給湯熱交換器出口温度の設定を高くする。そして、運転制御手段は給湯温度検知手段の信号が湯温設定手段の信号と同じになるように、流量制御手段で給湯回路の流量を制御する。従って、入浴終了直後など浴槽残湯温度が高い場合には、圧縮機の低圧が比較的高くなるため、圧縮比が小さくなる。従って、高温沸き上げができるため、特に給湯負荷が大きい冬季においては貯湯熱量の増加をはかることが可能となる。なお、給湯循環ポンプの回転制御をおこなうことにより、給湯回路の流量を制御してもよい。
【０００８】
また、圧縮機を有する冷媒回路と、前記冷媒回路に接続した給湯加熱器および排熱利用熱交換器と、貯湯槽の湯水が流動し、前記給湯加熱器と熱交換関係を有する給湯熱交換器を途中に接続した給湯回路と、風呂循環ポンプを介して浴槽の湯水を循環させるとともに、前記排熱利用熱交換器と熱交換関係を有する風呂熱交換器を途中に接続した風呂循環回路と、前記給湯熱交換器の水出口温度を検出する給湯温度検知手段と、前記冷媒回路の冷媒温度を検出する冷媒温度検知手段と、前記冷媒温度検知手段の信号を受けて前記給湯熱交換器の水出口湯温を設定する湯温設定手段と、前記湯温設定手段の信号と前記給湯温度検知手段の信号に基づき前記給湯回路の流量制御をおこなうものである。浴槽排熱利用の給湯運転において、冷媒回路低圧側の冷媒温度を冷媒温度検知手段で検出し、所定温度より高い場合には湯温設定手段が給湯熱交換器の出口湯温を高く設定し、運転制御手段は給湯回路の流量を制御する。従って、予め設定された冷媒温度と給湯温度で運転することになり、風呂循環回路系の配管形態（曲がりの数）の多様化および長配管により風呂熱交換器と浴槽を接続設置しても圧縮機の信頼性を確保して高温沸き上げができる。また、浴槽排熱利用量が増加するとともに圧縮機の冷媒吐出温度は異常上昇することもないため圧縮機のモータ巻線などの信頼性、耐久性が向上する。
【０００９】
また、圧縮機は、風呂循環回路の水温に基づいて回転数を可変とするものであり、浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は吸熱されて低下する。また、残湯温度の低下にともない圧縮機の低圧および圧力相当の飽和冷媒温度も低下する。そして、風呂温度検知手段あるいは冷媒温度検知手段の信号が所定温度まで低下したことを示す信号に達すると、圧縮機の回転周波数を下げる制御をおこなう。従って、浴槽残湯温度の低下とともに圧縮機の回転周波数を下げるため、ヒートポンプの低圧は再び上昇し、高温高効率で運転することができる。
【００１０】
また、給湯熱交換器の湯出口から貯湯槽上部と前記貯湯槽の中間位置へ流路の切り替えをおこなう給湯切り替え弁と、湯温設定手段の信号を受けて前記給湯切り替え弁を制御する弁制御部を備えるものであり、浴槽排熱利用の給湯運転において、弁制御部は給湯熱交換器から流出する湯が高温の場合は貯湯槽の上部に流入するように、また、中温湯は貯湯槽の中間位置に流入するように給湯切り替え弁を制御する。従って、貯湯槽に異なる温度の湯を貯湯することができるため、用途に適した湯温が利用できるようになる。
【００１１】
また、湯槽に設けた貯湯温度検知手段と、前日の前記貯湯温度検知手段の信号を記憶する湯量記憶手段と、前記貯湯温度検知手段の信号と前記湯量記憶手段の信号を受けて給湯熱交換器の出口湯温を設定する湯温設定部とを備え、運転制御手段は、前記湯温設定部の信号と給湯温度検知手段の信号に基づき流量制御手段の制御をおこなうものであり、浴槽排熱利用の給湯運転において、運転制御手段は湯量記憶手段の信号と貯湯温度検知手段の信号から貯湯槽の使用湯量を判断し、使用湯量が増加したと判断した場合には給湯熱交換器の出口湯温を高く設定して運転をおこなう。逆に、使用湯量が減少したと判断した場合には給湯熱交換器の出口湯温を低く設定して高効率運転をおこなう。従って、給湯使用湯量の増減に応じて、貯湯熱量の最適化と高効率運転制御ができる。
【００１２】
また、圧縮機の冷媒吐出温度を検知する吐出温度検知手段と、風呂循環回路の流量制御をおこなう風呂流量制御手段と、前記吐出温度検知手段の信号を受けて前記風呂流量制御手段を制御する流量制御部を有するものであり、冬季の浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は低下し、ヒートポンプサイクル内の低圧がしだいに低下して、圧縮比が大きくなり、圧縮機の冷媒吐出温度は上昇する。そして、冷媒吐出温度が所定温度に達すると流量制御部は風呂流量制御手段に信号を送り、風呂循環回路の流量を大きくするように風呂流量制御手段の制御をおこなう。そのため、吸熱量が大きくなって、圧縮機の低圧は上昇する。また、風呂熱交換器の水出入口温度差は小さくなるため、風呂循環系の残湯水が凍結することもなく、かなり低温まで利用することができる。従って、浴槽の残湯熱利用が増加する。
【００１３】
また、給水温度を検知する給水温度検知手段と、残湯水の排水を行う排水開閉弁と、前記風呂温度検知手段と前記給水温度検知手段の信号に基づき前記排水開閉弁を開放する制御手段を有するものであり、浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は吸熱されてしだいに低下する。そして、風呂温度検知手段は残湯温度を検知して制御手段に信号を送る。制御手段は風呂温度検知手段の信号と給水温度検知手段の信号が同じになる排水開閉弁を開放する。従って、風呂の残湯熱を利用して高効率で給湯運転できるとともに風呂循環系内の雑菌が繁殖することもない。
【００１４】
また、風呂循環回路内の湯を高温滅菌する滅菌手段と、滅菌終了を検出する滅菌終了検出手段と、前記滅菌終了検出手段の信号を受けて前記滅菌手段を制御する制御部と、前記制御部の信号を受けて冷媒回路によるヒートポンプ給湯運転を有するものであり、浴槽排熱利用の給湯運転において、最初に、風呂循環回路内の雑菌を滅菌手段によって高温滅菌する。そして、制御部は滅菌終了検出手段の信号を運転制御部に送り、浴槽排熱利用の給湯運転を開始する。従って、風呂循環系内の水は再利用できることになり、節水となる。また、滅菌終了後の高温湯が排熱利用できるため高効率給湯運転が可能となり、エネルギーの有効活用ができる。
【００１５】
以下、本発明の実施例について図面を用いて説明する。
【００１６】
なお、従来例および各実施例において、同じ構成同じ動作をするものについては同一符号を付し一部説明を省略する。
【００１７】
（実施例１）
図１は本発明の実施例１のヒートポンプ式風呂給湯システムの構成図である。また、図２は同ヒートポンプ式風呂給湯システムの他の流量制御方法の構成図である。図１において、１は圧縮機、２は給湯加熱器、３は減圧装置、４は排熱利用熱交換器であり、圧縮機１、給湯加熱器２、減圧装置３、排熱利用熱交換器４で冷媒回路を構成する。５は貯湯槽、６は給湯循環ポンプ、７は給湯熱交換器であり、給湯加熱器２と熱交換関係を有する。また、貯湯槽５、給湯循環ポンプ６、給湯熱交換器７で給湯回路を構成する。８は浴槽、９は風呂循環ポンプ、１０は風呂熱交換器であり、排熱利用熱交換器４と熱交換関係を有する。また、浴槽８、風呂循環ポンプ９、風呂熱交換器１０で風呂循環回路を構成する。１１は流量制御手段であり、給湯回路の流量制御をおこなう。１２は給湯温度検知手段であり、前記給湯熱交換器７の水出口温度を検出する。１３は風呂温度検知手段であり、風呂熱交換器１０の水入口温度を検出する。１４は湯温設定手段であり、風呂温度検知手段１３の信号を受けて給湯熱交換器７の水出口温度を設定する。１５は運転制御手段であり、給湯温度検知手段１２の信号と湯温制御手段１４の信号に基づき流量制御手段１１の制御をおこなう。また、図に２において、１６は回転数制御型の給湯循環ポンプである。１７は回転数制御手段であり、給湯循環ポンプ１６の回転数制御をおこなう。１８は運転制御手段であり、給湯温度検知手段１２の信号と湯温制御手段１４の信号を受けて回転数制御手段１７に信号を送る。
【００１８】
以上の構成においてその動作、作用について説明する。図１に示す実施例において、浴槽排熱利用の給湯運転において、圧縮機１から吐出した高温高圧のガス冷媒は給湯加熱器２に流入する。一方、貯湯槽５の水は給湯循環ポンプ６によって給湯熱交換器７に流入し、ここで、冷媒の凝縮熱によって給湯加熱器２を介して加熱されて貯湯槽５に流入する。また、凝縮液化した冷媒は減圧装置３で減圧されて排熱利用熱交換器４に流入する。一方、浴槽８の残湯は風呂循環ポンプ９によって風呂熱交換器１０に流入し、ここで風呂熱交換器１０を介して排熱利用熱交換器４を流れる冷媒を蒸発ガス化させる。そして、水温を下げて浴槽８に流入する。また、蒸発ガス化した冷媒は圧縮機１に流入して１サイクルの運転となる。その際に、風呂温度検知手段１３は風呂循環回路の水温を検出して、湯温設定手段１４に信号を送る。
【００１９】
そして、運転制御手段１５は給湯温度検知手段１２の信号が湯温設定手段１４の信号と同じになるように流量制御手段１１の制御をおこない給湯回路の流量を制御する。この場合、風呂温度検知手段１３の信号を受けた湯温設定手段１４は風呂循環回路の水温が所定温度よりも高温の場合には給湯熱交換器７の水出口温度を高く設定して、高温沸き上げの給湯運転をおこなう。従って、家族全員の入浴完了直後は浴槽８の残湯温度が高いため、圧縮機１の低圧は比較的高くなって圧縮比が小さい状態で運転する。そのため、高温湯に沸き上げても圧縮機１の吐出冷媒温度は低いため、高温沸き上げが可能となる。特に給湯負荷が多い冬季においては、高温沸き上げにより貯湯熱量が増加して湯切れの心配を解消することができる。また、図２に示す他の実施例において、流量制御手段１１の代わりに給湯循環ポンプ１６を用いて、回転数制御手段１７で給湯循環ポンプ１６の回転数制御をおこなう。そして、運転制御手段１８は給湯温度検知手段１２の信号と湯温制御手段１４の信号を受けて回転数制御手段１７に信号を送り、給湯循環ポンプ１６の回転数制御をおこなって流量制御をするため、同じ効果が得られる。従って、以下の説明では省略する。
【００２０】
（実施例２）
図３は本発明の実施例２のヒートポンプ式風呂給湯システムの構成図である。図３において、１９は冷媒温度検知手段であり、排熱利用熱交換器４の冷媒入口温度を検出する。２０は湯温設定手段であり、冷媒温度検知手段１９の信号を受けて給湯熱交換器７の水出口温度を設定する。２１は運転制御手段であり、給湯温度検知手段１２の信号と湯温設定手段２０の信号に基づき流量制御手段１１の制御をおこなう。
【００２１】
以上の構成においてその動作、作用を説明する。浴槽排熱利用の給湯運転において、ヒートポンプサイクルの低圧側の冷媒状態を冷媒温度検知手段１９で検出して湯温設定手段２０に信号を送る。そして、湯温設定手段２０は冷媒温度検知手段１９の信号が所定温度よりも高温の信号を示す場合には、給湯熱交換器７の水出口温度を高温に設定する。そして、運転制御手段２１は給湯温度検知手段１２の信号が湯温設定手段２０の信号と同じになるように流量制御手段１１の制御をおこなうため高温沸き上げとなる。従って、予め設定された冷媒温度と給湯温度で運転することになり、風呂循環回路系の配管形態（曲がりの数）の多様化および長配管により風呂熱交換器１０と浴槽８を接続設置しても圧縮機１の信頼性を確保して高温沸き上げができる。
【００２２】
（実施例３）
図４は本発明の実施例３のヒートポンプ式風呂給湯システムの構成図である。図４において、２２は吐出温度検知手段であり、圧縮機１の冷媒吐出温度を検知する。２３は湯温設定手段であり、吐出温度検知手段２２の信号を受けて給湯熱交換器７の水出口温度を設定する。２４は運転制御手段であり、給湯温度検知手段１２の信号と湯温設定手段２３の信号に基づき流量制御手段１１の制御をおこなう。
【００２３】
以上の構成においてその動作、作用を説明する。浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は吸熱されて低下する。そのため、ヒートポンプサイクル内の低圧はしだいに低下して、圧縮比が大きくなり、圧縮機１の冷媒吐出温度は上昇する。そして、冷媒吐出温度が所定温度に達すると吐出温度検知手段２２は湯温設定手段２３に信号を送り、給湯熱交換器７の水出口温度を低温に設定する。そして、運転制御手段２４は給湯温度検知手段１２の信号が湯温設定手段２３の信号と同じになるように流量制御手段１１の制御をおこない、給湯回路の流量を大きくする。よって、浴槽排熱利用量が増加するとともに圧縮機の冷媒吐出温度は異常上昇することもないため圧縮機のモータ巻線などの信頼性、耐久性が向上する。
【００２４】
（実施例４）
図５は本発明の実施例４のヒートポンプ式風呂給湯システムの構成図である。図５において、２５は回転周波数可変型の圧縮機である。２６はインバータ電源部であり、圧縮機２５の回転周波数を可変する。２７は周波数制御手段であり、湯温設定手段１４の信号を受けてインバータ電源部２６の周波数制御をおこなう。
【００２５】
以上の構成においてその動作、作用を説明する。浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は吸熱されて低下する。そして、風呂温度検知手段１３あるいは図３に示す冷媒温度検知手段１９の信号が所定温度まで低下したことを示す信号を発信すると湯温設定手段１４は周波数制御手段２７に信号を送る。そして、周波数制御手段２７はインバータ電源部２６に信号を送り、圧縮機２５の回転周波数を下げる制御をおこなう。従って、浴槽残湯温度の低下とともに圧縮機２５の回転周波数を下げるため、ヒートポンプの低圧は再び上昇し、高温高効率で運転することができる。
【００２６】
（実施例５）
図６は本発明の実施例５のヒートポンプ式風呂給湯システムの構成図である。図６において、２８は給湯切り替え弁であり、給湯熱交換器７の湯出口から貯湯槽５上部と貯湯槽５の中間位置へ流路の切り替えをおこなう。２９は弁制御部であり、湯温設定手段１４の信号を受けて給湯切り替え弁２８を制御する。
【００２７】
以上の構成においてその動作、作用を説明する。浴槽排熱利用の給湯運転において、入浴完了直後など浴槽残湯温度が高い場合には、湯温設定手段１４は高温沸き上げを設定するため、給湯熱交換器７からは高温湯が流出する。そして、運転経過とともに浴槽残湯温度は低くなり、湯温設定手段１４は沸き上げ温度の設定を少し下げるように切り変わる。そのため、給湯熱交換器７からは当初の運転時より少し温度が低い中温湯が流出する。そして、弁制御部２９は給湯熱交換器７から流出する湯が高温の場合は貯湯槽５の上部に流入するように、また、中温湯は貯湯槽５の中間位置に流入するように給湯切り替え弁２８を制御する。従って、貯湯槽５に異なる温度の湯を貯湯させることができ、用途に応じて必要な温度の湯が利用できる。
【００２８】
（実施例６）
図７は本発明の実施例６のヒートポンプ式風呂給湯システムの構成図である。図７において、３０は貯湯温度検知手段であり、貯湯槽５の内部あるいは表面に複数設けて、貯湯温度を検出する。３１は湯量記憶手段であり、前日の貯湯温度検知手段３１の信号を記憶する。３２は湯温設定手段であり、貯湯温度検知手段３０の信号と前記湯量記憶手段３１の信号を受けて給湯熱交換器７の出口湯温を設定する。３３は運転制御手段であり、湯温設定手段３２の信号と給湯温度検知手段１２に基づき流量制御手段１１の制御をおこなう。
【００２９】
以上の構成において動作、作用を説明する。浴槽排熱利用の給湯運転において、例えば、その日の家族が入浴を全員終了した後の運転開始時において、先ず、湯温設定手段３２は貯湯温度検知手段３０の信号と湯量記憶手段３１の信号から貯湯槽５の使用湯量を判断して、湯の使用が増加している場合には給湯熱交換器７の出口湯温を高く設定する。そして、浴槽排熱利用の給湯運転が開始される。その際に給湯温度検知手段１２の信号が湯温設定手段３２の信号と同じになるように運転制御手段３３は流量制御手段１１を制御する。そのため、給湯熱交換器７の出口から流出した湯は前日よりも高温の湯として貯湯槽５の上部から貯湯される。また、貯湯槽５の湯の使用量が減少していると判断した場合には、湯温設定手段３２は給湯熱交換器７の出口湯温を低く設定する。運転制御手段３３は給湯温度検知手段１２の信号が湯温設定手段３２の信号と同じになるように流量制御手段１１を制御する。この場合には、給湯熱交換器７の出口湯温は低いため、高効率で運転ができる。また、貯湯槽５からの放熱損失も少なくなる。従って、給湯使用量の増減に応じて、貯湯熱量の最適化と高効率運転制御ができる。
【００３０】
（実施例７）
図８は本発明の実施例７のヒートポンプ式風呂給湯システムの構成図である。図８において、３４は風呂流量制御手段であり、風呂循環回路の流量制御をおこなう。３５は流量制御部であり、吐出温度検知手段２２の信号を受けて風呂流量制御手段３４を制御する。
【００３１】
以上の構成においてその動作、作用を説明する。冬季の浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は低下し、ヒートポンプサイクル内の低圧がしだいに低下する。そのため、圧縮機１の圧縮比が大きくなり、圧縮機の冷媒吐出温度は上昇する。また、吐出温度検知手段２２は冷媒吐出温度を検出し、流量制御部３５に信号を送る。そして、流量制御部３５は冷媒吐出温度が所定温度に達したことを示す信号を受けると風呂流量制御手段３４に信号を送り、風呂循環回路の流量を大きくするように風呂流量制御手段３４の制御をおこなう。そのため、吸熱量が大きくなり、圧縮機１の低圧は上昇して圧縮比は小さくなる。また、風呂熱交換器１０の水出入口温度差は小さくなるため、風呂循環系の残湯水が凍結することもなく、かなり低温まで利用することができる。従って、浴槽の残湯熱利用が増加する。
【００３２】
（実施例８）
図９は本発明の実施例８のヒートポンプ式風呂給湯システムの構成図である。３６は給水温度検知手段である。３７は排水開閉弁であり、浴槽８に設けてある。３８は制御手段であり、風呂温度検知手段１３と給水温度検知手段３６の信号に基づき排水開閉弁３７を開放する。
【００３３】
以上の構成において動作、作用を説明する。浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は吸熱されてしだいに低下する。そして、風呂温度検知手段１３は残湯温度を検知して制御手段３８に信号を送る。制御手段３８は風呂温度検知手段１３の信号と給水温度検知手段３６の信号が同じになると排水開閉弁３７を開放する。従って、風呂残湯熱を利用して高効率で給湯運転できるとともに風呂循環系内の雑菌が繁殖することもない。
【００３４】
（実施例９）
図１０は本発明の実施例９のヒートポンプ式風呂給湯システムの構成図である。９は滅菌手段であり、風呂循環回路に接続されて、加熱源４０で回路中の残湯水を高温滅菌する。４１は滅菌終了検出手段であり、滅菌終了を検出する。４２は制御部であり、滅菌終了検出手段４１の信号を受けて滅菌手段３９を制御する。４３は運転制御部であり、制御部４２の信号を受けてヒートポンプ給湯運転をおこなう。
【００３５】
以上の構成においてその動作、作用を説明する。浴槽排熱利用の給湯運転において、最初に滅菌手段３９は加熱源４０によって風呂循環回路内の雑菌を高温滅菌する。そして、制御部４２は滅菌終了検出手段４１の信号を運転制御部４３に送り、浴槽排熱利用の給湯運転を開始する。従って、風呂循環系内の水は再利用できることになり、節水となる。また、滅菌終了後の高温の湯の排熱利用ができるため高効率給湯運転が可能となり、エネルギーの有効活用ができる。
【００３６】
（実施例１０）
図１１は本発明の実施例１０のヒートポンプ式風呂給湯システムの構成図である。４４は自然熱利用熱交換器であり、大気熱あるいは太陽熱を利用する。４５は四方弁であり、圧縮機１の吐出冷媒流路を給湯加熱器２と自然熱利用熱交換器４４に切り替える４６は排熱利用熱交換器であり、自然熱利用熱交換器４４と並列に設けて一端が四方弁４５の低圧ガス冷媒管と接続されている。４７は冷媒温度検知手段であり、自然熱利用熱交換器４４の冷媒入口温度を検知する。４８は運転制御手段であり、冷媒温度検知手段４７の信号を受けて四方弁４５の冷媒流路を圧縮機１、四方弁４５、自然熱利用熱交換器４４、排熱利用熱交換器４６からなる冷媒除霜回路で運転をおこなう。
【００３７】
以上の構成においてその動作、作用を説明する。冬季などの着霜条件下における給湯運転において、圧縮機１から吐出した高温高圧のガス冷媒は四方弁４５を通り給湯加熱器２に流入する。一方、貯湯槽５の水は給湯循環ポンプによって給湯熱交換器７に流入し、ここで、冷媒の凝縮熱によって給湯加熱器２を介して加熱されて貯湯槽５に流入する。また、凝縮液化した冷媒は減圧装置３で減圧されて自然熱利用熱交換器４４に流入し、蒸発ガス化して四方弁４５を通り圧縮機１に流入する。この運転において、自然熱利用熱交換器４４に着霜が生じると、入口冷媒温度は低下し、吸熱量も低下する。冷媒温度検知手段４７は入口冷媒温度が所定温度まで低下したことを検出して運転制御手段４８に信号を送る。そして、運転制御手段４８は四方弁４５の冷媒流路を切り替えて冷媒除霜回路で運転をおこなう。この場合には圧縮機１から吐出したガス冷媒は四方弁４５を通り自然熱利用熱交換器４４に流入する。そして、冷媒の凝縮熱によって除霜をおこない、液化冷媒となって排熱利用熱交換器４６に流入する。ここで、風呂循環ポンプ９によって送られてきた浴槽８の残湯は風呂熱交換器１０に流入し、ここで風呂熱交換器１０を介して排熱利用熱交換器４６を流れる冷媒を蒸発ガス化させる。一方、蒸発ガス化した冷媒は圧縮機１に流入する。従って、除霜運転時に浴槽８の残湯熱を利用するため、短時間で除霜が終了できる。また、簡単な構成であるため、部品も少なくコストも安価となる。
【００３８】
（実施例１１）
図１２は本発明の実施例１１のヒートポンプ式給湯システムの構成図である。図１２において、４９は補助熱交換器であり、自然熱利用熱交換器４４の空気流れ方向の上流に設けて風呂循環回路と接続されている。５０は流量制御手段であり、風呂循環回路の水を補助熱交換器４９へ流す制御をおこなう。５１は除霜制御手段であり、運転制御手段４８の信号を受けて流量制御手段５０の制御をおこなう。
【００３９】
以上の構成においてその動作、作用を説明する。給湯運転時の除霜において、運転制御手段４８は四方弁４５を切り替えて除霜回路で運転をおこなうとともに除霜制御手段５１に信号を送る。そして、除霜制御手段５１は流量制御手段を制御して風呂循環回路の水を補助熱交換器４９へ流す。従って、自然熱利用熱交換器４４は圧縮機１の凝縮熱と風呂循環回路の湯水の熱で除霜されるため、さらに短時間で除霜が終了できる。
【００４０】
（実施例１２）
図１３は本発明の実施例１２のヒートポンプ式風呂給湯システムの構成図である。図１３において、実線矢印は風の流れ方向を示す。
【００４１】
５２は冷媒回路であり、圧縮機１、四方弁４５、給湯加熱器２、減圧手段３、大気熱あるいは太陽熱を利用する自然熱利用熱交換器４４からなる。５３は風呂循環回路であり、浴槽８、風呂循環ポンプ９、補助熱交換器４９からなる。５４は送風手段であり、風の流れ方向が補助熱交換器４９から自然熱利用熱交換器４４へ流れるように送風する。
【００４２】
以上の構成においてその動作、作用を説明する。給湯運転において、圧縮機１から吐出した高温高圧のガス冷媒は給湯加熱器２に流入し、ここで、冷媒の凝縮熱によって給湯加熱器を介して貯湯槽５の水を加熱する。そして、凝縮液化した冷媒は減圧装置３で減圧されて自然熱利用熱交換器４４に流入する。一方、浴槽８の残湯は風呂循環ポンプ９によって補助熱交換器４９に流入し、ここで送風手段５４で吸引された大気へ放熱する。そして、加温された大気は風下の自然熱利用熱交換器４４を通過する際に内部を流れる冷媒を加熱し蒸発ガス化させる。従って、自然熱利用熱交換器４４で外気の大気熱よりもエンタルピーの高い大気熱を吸熱するため、高温高効率給湯運転が可能となる。また、特に冬季の外気温度が低い運転時は自然熱利用熱交換器４４で着霜が生じ難くなるため、高能力高効率で運転できる。
以上の説明からも明らかのように、各実施例の効果をまとめれば以下の通りである。
【００４３】
（１）浴槽排熱利用の給湯運転において、給湯回路の流量制御をおこなう流量制御手段と、前記給湯熱交換器の水出口温度を検出する給湯温度検知手段と、前記風呂循環回路の水温を検出する風呂温度検知手段と、前記風呂温度検知手段の信号を受けて前記給湯熱交換器の水出口湯温を設定する湯温設定手段と、前記湯温設定手段の信号と前記給湯温度検知手段の信号に基づき前記流量制御手段の制御をおこなう運転制御手段を備え、風呂循環回路の水温を検出して、所定温度よりも高温の場合には給湯熱交換器の出口温度の設定を高くして、給湯温度が湯温設定温度となるように給湯回路の流量制御をおこない、浴槽残湯温度が高い場合に沸き上げ温度を高めて貯湯するため、貯湯熱量が増加する。
【００４４】
（２）冷媒回路の冷媒温度を検出する冷媒温度検知手段と、冷媒温度検知手段の信号を受けて給湯熱交換器の水出口湯温を設定する湯温設定手段と、前記湯温設定手段の信号と給湯温度検知手段の信号に基づき流量制御手段の制御をおこなう運転制御手段を備え、浴槽排熱利用の給湯運転において、冷媒回路低圧側の冷媒温度を検出して所定温度より高温の場合には給湯熱交換器の出口湯温の設定を高くして、給湯温度が湯温設定温度となるように給湯回路の流量制御をおこなうことによって、予め設定された冷媒温度と給湯温度で運転することになり、風呂循環回路系の配管形態（曲がりの数）の多様化および長配管による風呂熱交換器と浴槽を接続設置しても圧縮機の信頼性を確保して高温沸き上げができる。また、浴槽排熱利用量が増加するとともに圧縮機の冷媒吐出温度は異常上昇することもないため圧縮機のモータ巻線などの信頼性、耐久性が向上する。
【００４５】
（３）風呂循環回路の水温に基づいて回転周波数を可変とする圧縮機によれば、浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度および冷媒回路の低圧圧力相当の飽和冷媒温度は低下する。そして、風呂温度あるいは冷媒温度が所定温度に低下した時に圧縮機の回転周波数を下げる制御をおこない浴槽残湯温度の低下とともに前記圧縮機の回転周波数を下げるため、冷媒回路の低圧は再び上昇し、高温高効率で運転することができる。
【００４６】
（４）給湯熱交換器の湯出口から貯湯槽上部と貯湯槽の中間位置へ流路の切り替えをおこなう給湯切り替え弁と、湯温設定手段の信号を受けて給湯切り替え弁を制御する弁制御部を備え、浴槽排熱利用の給湯運転において、弁制御部は給湯熱交換器から流出する湯が高温の場合は貯湯槽の上部に流入するように、また、中温湯は貯湯槽の中間位置に流入するように給湯切り替え弁を制御する。従って、貯湯槽に異なる温度の湯を貯湯することができるため、用途に適した湯温が利用できるようになる。
【００４７】
（５）貯湯槽に設けた複数の貯湯温度検知手段と、前日の貯湯温度検知手段の信号を記憶する湯量記憶手段と、貯湯温度検知手段の信号と湯量記憶手段の信号を受けて給湯熱交換器の出口の湯温を設定する湯温設定手段と、湯温設定手段の信号と給湯温度検知手段の信号から流量制御手段の制御をおこなう運転制御手段を備え、浴槽排熱利用の給湯運転において、湯量記憶手段の信号と貯湯温度検知手段の信号から貯湯槽の使用湯量を判断し、使用湯量が増加した場合には湯温設定手段が給湯熱交換器の出口湯温を高く設定して運転をおこなう。逆に、使用湯量が減少した場合には給湯熱交換器の出口湯温を低く設定して高効率運転をおこなう。従って、給湯使用湯量の増減に応じて、貯湯熱量の最適化と高効率運転制御ができる。
【００４８】
（６）圧縮機の冷媒吐出温度を検知する吐出温度検知手段と、風呂循環回路の流量制御をおこなう風呂流量制御手段と、吐出温度検知手段の信号を受けて風呂流量制御手段を制御する流量制御部を備え、冬季の浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は低下し、圧縮機の冷媒吐出温度は上昇する。そして、冷媒吐出温度が所定温度に達すると風呂循環回路の流量を大きくするように風呂流量制御手段の制御をおこなうため、吸熱量が大きくなって、圧縮機の低圧は上昇して冷媒吐出温度は低下する。また、風呂熱交換器の水の出口、入口の温度差は小さくなるため、風呂循環系の残湯水が凍結することもなく、かなり低温まで利用することができる。従って、浴槽の残湯熱利用が増加する。
【００４９】
（７）風呂循環回路に設けた風呂温度検知手段と、給水温度を検知する給水温度検知手段と、浴槽に設けた排水開閉弁と、風呂温度検知手段と給水温度検知手段の信号に基づき排水開閉弁を開放する制御手段を備え、浴槽排熱利用の給湯運転において、運転経過とともに風呂循環回路内の残湯温度は低下し、給水温度と同温に達すると排水開閉弁を開放して排水するため、風呂の残湯を利用して高効率で給湯運転できるとともに風呂循環系内の雑菌の繁殖を抑制することができる。
【００５０】
（８）風呂循環回路内の湯を高温滅菌する滅菌手段と、滅菌終了を検出する滅菌終了検出手段と、滅菌終了検出手段の信号を受けて滅菌手段を制御する制御部と、制御部の信号を受けて冷媒回路によるヒートポンプ給湯運転をおこなう運転制御部を備え、浴槽排熱利用の給湯運転において、最初に風呂循環回路内の雑菌を高温滅菌し、滅菌終了後に浴槽排熱利用の給湯運転を開始するため、風呂循環系内の水は再利用できることになり、節水となる。また、滅菌終了後の高温湯が排熱利用できるため高効率給湯運転が可能となり、エネルギーの有効活用ができる。
【００５１】
（９）圧縮機、四方弁、給湯加熱器、減圧手段、大気熱あるいは太陽熱を利用する自然熱利用熱交換器からなる冷媒給湯回路と、自然熱利用熱交換器と並列に設けて一端が四方弁の低圧ガス冷媒管と接続された排熱利用熱交換器と、貯湯槽、給湯循環ポンプ、給湯加熱器と熱交換関係を有する給湯熱交換器を接続した給湯回路と、浴槽、風呂循環ポンプ、排熱利用熱交換器と熱交換関係を有する風呂熱交換器を接続した風呂循環回路と、自然熱利用熱交換器の冷媒入口温度を検知する冷媒温度検知手段と、冷媒温度検知手段の信号を受けて四方弁の冷媒流路を圧縮機、四方弁、自然熱利用熱交換器、排熱利用熱交換器からなる冷媒除霜回路で運転をおこなう運転制御手段を備え、冬季などの着霜条件下における給湯運転において、自然熱利用熱交換器に着霜が生じて入口冷媒温度が所定温度まで低下したことを検出して四方弁の冷媒流路を切り替え、浴槽の残湯熱を利用して圧縮機の凝縮熱で自然熱利用熱交換器の除霜をおこなうため、短時間で除霜が終了できることになり、給湯運転時間および加熱能力が増加する。また、簡単な構成であるため、部品も少なくコストも安価となる。
【００５２】
（１０）自然熱利用熱交換器の空気流れ方向の上流に設けて風呂循環回路と接続された補助熱交換器と、風呂循環回路の水を補助熱交換器へ流す制御をおこなう流量制御手段と、運転制御手段の信号を受けて流量制御手段の制御をおこなう除霜制御手段を備え、給湯運転時の除霜において、自然熱利用熱交換器に着霜が生じて入口冷媒温度が所定温度まで低下したことを検出して四方弁の冷媒流路を切り替えて除霜運転をおこなうとともに風呂循環回路の水を補助熱交換器へ流す。従って、自然熱利用熱交換器は圧縮機の凝縮熱と風呂循環回路の湯水の熱で除霜されるため、さらに短時間で除霜が終了できる。
【００５３】
（１１）圧縮機、四方弁、給湯加熱器、減圧手段、大気熱あるいは太陽熱を利用する自然熱利用熱交換器からなる冷媒給湯回路と、貯湯槽、給湯加熱器と熱交換関係を有する給湯熱交換器を接続した給湯回路と、自然熱利用熱交換器の空気の流れ方向の上流に設けた補助熱交換器と、浴槽、風呂循環ポンプ、補助熱交換器からなる風呂循環回路を備え、給湯運転において、浴槽の残湯熱を補助熱交換器に流して自然熱利用熱交換器を熱源となる大気熱あるいは太陽熱に加えて加熱するため、高温高効率給湯運転が可能となる。特に冬季の外気温度が低い運転時は自然熱利用熱交換器で着霜が生じ難くなるため、高能力高効率が運転できる。
【００５４】
【発明の効果】
以上のように本発明によれば、風呂循環回路の水温を検出して、所定温度よりも高温の場合には給湯熱交換器の出口温度の設定を高くして、給湯温度が湯温設定温度となるように給湯回路の流量制御をおこない、浴槽残湯温度が高い場合に沸き上げ温度を高めて貯湯するため、貯湯熱量が増加する。
【図面の簡単な説明】
【図１】本発明の実施例１のヒートポンプ式風呂給湯システムの構成図
【図２】同ヒートポンプ式風呂給湯システムの他の流量制御方法を示す構成図
【図３】本発明の実施例２のヒートポンプ式風呂給湯システムの構成図
【図４】本発明の実施例３のヒートポンプ式風呂給湯システムの構成図
【図５】本発明の実施例４のヒートポンプ式風呂給湯システムの構成図
【図６】本発明の実施例５のヒートポンプ式風呂給湯システムの構成図
【図７】本発明の実施例６のヒートポンプ式風呂給湯システムの構成図
【図８】本発明の実施例７のヒートポンプ式風呂給湯システムの構成図
【図９】本発明の実施例８のヒートポンプ式風呂給湯システムの構成図
【図１０】本発明の実施例９のヒートポンプ式風呂給湯システムの構成図
【図１１】本発明の実施例１０のヒートポンプ式風呂給湯システムの構成図
【図１２】本発明の実施例１１のヒートポンプ式風呂給湯システムの構成図
【図１３】本発明の実施例１２のヒートポンプ式風呂給湯システムの構成図
【図１４】従来のヒートポンプシステムの構成図
【符号の説明】
１、２５圧縮機
２給湯加熱器
３減圧装置
４、４６排熱利用熱交換器
５貯湯槽
６、１６給湯循環ポンプ
７給湯熱交換器
８浴槽
９風呂循環ポンプ
１０風呂熱交換器
１１流量制御手段
１２給湯温度検知手段
１３風呂温度検知手段
１４、２０、２３、３２湯温設定手段
１５、１８、２１、２４、３３、４８運転制御手段
１７回転数制御手段
１９、４７冷媒温度検知手段
２２吐出温度検知手段
２６インバータ電源部
２７周波数制御手段
２８給湯切り替え弁
２９弁制御部
３０貯湯温度検知手段
３１湯量記憶手段
３４風呂流量制御手段
３５流量制御部
３６給水温度検知手段
３７排水開閉弁
３８制御手段
３９滅菌手段
４０加熱源
４１滅菌終了検出手段
４２制御部
４３運転制御部
４４自然熱利用熱交換器
４５四方弁
４９補助熱交換器
５０流量制御手段
５１除霜制御手段
５２冷媒回路
５３風呂循環回路
５４送風手段[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bath hot water supply system using a heat pump.
[0002]
[Prior art]
Conventionally, there is a heat pump system of this kind as disclosed in Japanese Patent Application Laid-Open No. 7-71839. Hereinafter, the related art will be described with reference to the drawings. FIG. 14 is a configuration diagram of a conventional heat pump system. In FIG. 14, high-pressure gas pipes 1a connected to the discharge side of the compressor 1, low-pressure gas pipes 1b connected to the suction side of the compressor 1, and liquid pipes 1c arranged together with the high-pressure and low-pressure gas pipes are provided with open / close valves 56a, 56b, 56c. , 56d, 56e, and 56f, the hot water supply heater 2, the exhaust heat utilization heat exchanger 4, and the atmospheric heat utilization heat exchanger 55 are configured to be connected in parallel. Further, by switching the on-off valves 56a, 56b, 56c, 56d, 56e, and 56f, a hot water supply operation, a bath reheating operation, a hot water reheating bath operation using hot water supply, and a hot water supply operation using exhaust heat from the bathtub are performed. For example, during the hot water supply operation using the exhaust heat from the bathtub, the open / close valves 56a and 56d are opened to absorb the hot water in the bathtub 8 via the heat exchanger 4 using the exhaust heat, and the hot water heater 2 heats the hot water to store the hot water.
[0003]
[Problems to be solved by the invention]
However, in the conventional heat pump system, the high-pressure liquid refrigerant flowing out of the hot water supply heater 2 becomes a low-pressure two-phase refrigerant at the refrigerant flow control valve 57 and further flows into the exhaust heat utilizing heat exchanger 4 through the refrigerant flow control valve 58. Will do. Therefore, the flow rate of the refrigerant is considerably reduced, so that a predetermined flow rate of the refrigerant cannot be obtained, and the refrigerant gas sucked into the compressor 1 is a low-pressure superheated gas. Therefore, the amount of heat collected by the heat exchanger 4 utilizing waste heat is reduced, and high efficiency cannot be obtained. Furthermore, high compression ratios make it impossible to achieve high temperatures.
[0004]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its main object to increase the amount of stored hot water by raising the temperature to a high temperature during a hot water supply operation utilizing bath tub exhaust heat.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present inventionA refrigerant circuit having a compressor, a hot water supply heater and a waste heat utilization heat exchanger connected to the refrigerant circuit,Hot water storage tankHot water flows,Hot water supply heat exchanger having a heat exchange relationship with the hot water supply heaterConnected in the middleHot water supply circuit and bath circulation pumpCirculates hot and cold water in the bathtub throughBath heat exchanger having a heat exchange relationship with the waste heat utilizing heat exchangerConnected in the middleBath circulation circuitWhen,Hot water supply temperature detecting means for detecting a water outlet temperature of the hot water supply heat exchanger, and the bath circulation circuitofA bath temperature detecting means for detecting a water temperature, and receiving a signal from the bath temperature detecting means,waterA heat pump type bath hot water supply system comprising hot water temperature setting means for setting an outlet hot water temperature, and performing flow control of the hot water supply circuit based on a signal from the hot water temperature setting means and a signal from the hot water supply temperature detecting means.You.
[0006]
According to the above configuration,In the hot water supply operation using the bathtub exhaust heat, the water temperature of the bath circulation circuit is detected, and when the temperature is higher than a predetermined temperature, the setting of the outlet temperature of the hot water supply heat exchanger is increased so that the hot water temperature becomes the set temperature. The temperature of the remaining hot water in the bathtub is high to control the flow rate. In particular, during operation immediately after the end of bathing or the like, hot water can be stored by raising the boiling temperature, and the amount of hot water stored increases. The effect is particularly large in winter when the hot water supply load is large and the outside air temperature is low.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
To solve the above problems,A refrigerant circuit having a compressor, a hot water supply heater and a waste heat utilization heat exchanger connected to the refrigerant circuit,Hot water tankHot water flows,Hot water supply heat exchanger having a heat exchange relationship with the hot water supply heaterConnected in the middleHot water supply circuit and bath circulation pumpCirculates hot and cold water in the bathtub throughBath heat exchanger having a heat exchange relationship with the waste heat utilizing heat exchangerConnected in the middleBath circulation circuitWhen,Hot water supply temperature detecting means for detecting a water outlet temperature of the hot water supply heat exchanger, and the bath circulation circuitofA bath temperature detecting means for detecting a water temperature, and receiving a signal from the bath temperature detecting means,waterA hot water temperature setting means for setting an outlet hot water temperature, wherein a flow rate of the hot water supply circuit is controlled based on a signal from the hot water temperature setting means and a signal from the hot water temperature detecting means..In the hot water supply operation using the exhaust heat of the bathtub, the high-temperature and high-pressure gas refrigerant discharged from the compressor flows into the hot water supply heater. On the other hand, the water in the hot water storage tank flows into the hot water supply heat exchanger by the hot water supply circulation pump, where it is heated by the heat of condensation of the refrigerant through the hot water supply heater and flows into the hot water storage tank. Further, the condensed and liquefied refrigerant is depressurized by the decompression device and flows into the heat exchanger using waste heat. On the other hand, the remaining hot water in the bathtub flows into the bath heat exchanger by the bath circulation pump, where the refrigerant flowing through the waste heat utilizing heat exchanger via the bath heat exchanger is vaporized and gasified. At this time, the bath temperature detecting means detects the water temperature of the bath circulation circuit, and if the signal is a signal higher than a predetermined temperature, the hot water temperature setting means increases the setting of the outlet temperature of the hot water supply heat exchanger. Then, the operation control means controls the flow rate of the hot water supply circuit by the flow rate control means so that the signal of the hot water temperature detection means becomes the same as the signal of the hot water temperature setting means. Therefore, when the temperature of the remaining hot water in the bathtub is high, such as immediately after the end of bathing, the low pressure of the compressor becomes relatively high, and the compression ratio becomes small. Therefore, since high-temperature boiling can be performed, it is possible to increase the amount of stored hot water particularly in winter when the hot water supply load is large.The flow rate of the hot water supply circuit may be controlled by controlling the rotation of the hot water supply circulation pump.
[0008]
Further, a refrigerant circuit having a compressor, a hot water supply heater and a waste heat utilization heat exchanger connected to the refrigerant circuit,Hot water tankHot water flows,Hot water supply heat exchanger having a heat exchange relationship with the hot water supply heaterConnected in the middleHot water supply circuit and bath circulation pumpCirculates hot and cold water in the bathtub throughBath heat exchanger having a heat exchange relationship with the waste heat utilizing heat exchangerConnected in the middleBath circulation circuitHot water supply temperature detection means for detecting a water outlet temperature of the hot water supply heat exchanger, refrigerant temperature detection means for detecting a refrigerant temperature of the refrigerant circuit, and the hot water supply heat exchanger receiving a signal from the refrigerant temperature detection means Hot water temperature setting means for setting the water outlet hot water temperature, based on a signal of the hot water temperature setting means and a signal of the hot water supply temperature detecting meansFor controlling the flow rate of the hot water supply circuitIt is.In the hot water supply operation utilizing the exhaust heat of the bathtub, the refrigerant temperature on the refrigerant circuit low pressure side is detected by the refrigerant temperature detection means, and when the temperature is higher than a predetermined temperature, the hot water temperature setting means sets the outlet hot water temperature of the hot water supply heat exchanger high, The operation control means controls the flow rate of the hot water supply circuit. Therefore, the operation is performed at the preset refrigerant temperature and hot water supply temperature, and even if the bath heat exchanger and the bathtub are connected and installed by diversifying the piping configuration (the number of bends) of the bath circulation circuit system and the long piping. High-temperature boiling can be performed while ensuring the reliability of the machine.Further, since the amount of waste heat used in the bathtub increases and the refrigerant discharge temperature of the compressor does not rise abnormally, the reliability and durability of the motor windings of the compressor and the like are improved.
[0009]
In addition, the compressor changes the rotation speed based on the water temperature of the bath circulation circuit.In the hot water supply operation using the exhaust heat from the bathtub, the temperature of the remaining hot water in the bath circuit decreases as the operation proceeds. Further, as the temperature of the remaining hot water decreases, the saturated refrigerant temperature corresponding to the low pressure and pressure of the compressor also decreases. Then, when the signal from the bath temperature detecting means or the refrigerant temperature detecting means reaches a signal indicating that the temperature has dropped to a predetermined temperature, control is performed to reduce the rotational frequency of the compressor. Therefore, since the rotation frequency of the compressor is lowered together with the temperature of the remaining hot water in the bathtub, the low pressure of the heat pump is increased again, and the operation can be performed at high temperature and high efficiency.
[0010]
Also, a hot water supply switching valve for switching a flow path from a hot water outlet of the hot water supply heat exchanger to an upper portion of the hot water storage tank and an intermediate position between the hot water storage tank and a valve control for controlling the hot water supply switching valve in response to a signal from the hot water temperature setting means. Part,In the hot water supply operation using the exhaust heat from the bathtub, the valve control unit causes the hot water flowing out of the hot water supply heat exchanger to flow into the upper portion of the hot water storage tank when the temperature is high, and the medium-temperature hot water to flow to an intermediate position of the hot water storage tank. The hot water supply switching valve is controlled. Therefore, since hot water having different temperatures can be stored in the hot water storage tank, a hot water temperature suitable for the application can be used.
[0011]
A hot water storage temperature detecting means provided in the hot water tank; a hot water storage means for storing a signal of the hot water storage temperature detecting means of the previous day; a hot water supply heat exchanger receiving the signal of the hot water storage temperature detecting means and the signal of the hot water storage means; A hot water temperature setting unit for setting an outlet hot water temperature, wherein the operation control unit controls the flow rate control unit based on a signal from the hot water temperature setting unit and a signal from the hot water supply temperature detecting unit.In the hot water supply operation utilizing the exhaust heat of the bathtub, the operation control means determines the amount of hot water in the hot water tank from the signal of the hot water storage means and the signal of the hot water storage temperature detecting means, and when it is determined that the hot water usage has increased, the hot water supply is performed. Set the outlet temperature of the heat exchanger to a high temperature to operate. Conversely, when it is determined that the amount of hot water used has decreased, the outlet hot water temperature of the hot water supply heat exchanger is set low to perform high-efficiency operation. Therefore, according to the increase / decrease of the amount of hot water used, the amount of hot water stored can be optimized and high-efficiency operation control can be performed.
[0012]
A discharge temperature detecting means for detecting a refrigerant discharge temperature of the compressor; a bath flow rate controlling means for controlling a flow rate of a bath circuit; and a flow rate for controlling the bath flow rate controlling means in response to a signal from the discharge temperature detecting means. Having a control unitIn the hot water supply operation using the bathtub exhaust heat in winter, the temperature of the remaining hot water in the bath circulation circuit decreases as the operation progresses, the low pressure in the heat pump cycle gradually decreases, the compression ratio increases, and the compressor The refrigerant discharge temperature rises. Then, when the refrigerant discharge temperature reaches the predetermined temperature, the flow control unit sends a signal to the bath flow control means to control the bath flow control means so as to increase the flow rate of the bath circulation circuit. Therefore, the heat absorption increases, and the low pressure of the compressor increases. Further, since the temperature difference between the water inlet and outlet of the bath heat exchanger becomes small, the remaining hot water in the bath circulation system does not freeze and can be used at a considerably low temperature. Therefore, the utilization of the remaining hot water in the bathtub increases.
[0013]
In addition, a water supply temperature detecting means for detecting a water supply temperature and drainage of remaining hot water are performed.A drain opening / closing valve, and control means for opening the drain opening / closing valve based on signals from the bath temperature detecting means and the feedwater temperature detecting means.thingIn the hot water supply operation using the exhaust heat from the bathtub, the temperature of the remaining hot water in the bath circulation circuit is gradually reduced as the operation proceeds. The bath temperature detecting means detects the remaining hot water temperature and sends a signal to the control means. The control means opens the drainage on-off valve at which the signal from the bath temperature detection means and the signal from the water supply temperature detection means become the same. Therefore, the hot water supply operation can be performed with high efficiency by using the remaining hot water in the bath, and no germs in the bath circulation system propagate.
[0014]
A sterilizing means for sterilizing hot water in the bath circulation circuit at a high temperature; a sterilization completion detecting means for detecting completion of sterilization; a control unit for controlling the sterilization means in response to a signal from the sterilization completion detecting means; With heat pump hot water supply operation by refrigerant circuit in response to the signal ofIn the hot water supply operation using the exhaust heat from the bathtub, first, various bacteria in the bath circulation circuit are sterilized at a high temperature by sterilization means. Then, the control unit sends a signal of the sterilization end detection means to the operation control unit, and starts a hot water supply operation using bathtub exhaust heat. Therefore, the water in the bath circulation system can be reused, and water is saved. Also, hot water after sterilization iswaste heatBecause it can be used, high-efficiency hot water supply operation is possible, and energy can be used effectively.
[0015]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
In the conventional example and each embodiment, the same components having the same operation are denoted by the same reference numerals, and the description thereof is partially omitted.
[0017]
(Example 1)
FIG. 1 is a configuration diagram of a heat pump type bath hot water supply system according to a first embodiment of the present invention. FIG. 2 is a block diagram of another flow control method of the heat pump type hot water supply system. In FIG. 1, 1 is a compressor, 2 is a hot water supply heater, 3 is a decompression device, and 4 is an exhaust heat utilization heat exchanger, and is a compressor 1, a hot water supply heater 2, a decompression device 3, and an exhaust heat utilization heat exchanger. 4 constitutes a refrigerant circuit. 5 is a hot water storage tank, 6 is a hot water supply circulation pump, 7 is a hot water supply heat exchanger, and has a heat exchange relationship with the hot water supply heater 2. Hot water storage tank 5, hot water supply circulation pump 6, and hot water supply heat exchanger 7 constitute a hot water supply circuit. 8 is a bathtub, 9 is a bath circulation pump, 10 is a bath heat exchanger, which has a heat exchange relationship with the exhaust heat utilization heat exchanger 4. In addition, the bathtub 8, the bath circulation pump 9, and the bath heat exchanger 10 constitute a bath circulation circuit. Numeral 11 denotes a flow control means for controlling the flow rate of the hot water supply circuit. Reference numeral 12 denotes hot water supply temperature detecting means for detecting a water outlet temperature of the hot water supply heat exchanger 7. Reference numeral 13 denotes a bath temperature detecting means for detecting a water inlet temperature of the bath heat exchanger 10. Reference numeral 14 denotes hot water temperature setting means, which receives a signal from the bath temperature detecting means 13 and sets the water outlet temperature of the hot water supply heat exchanger 7. An operation control unit 15 controls the flow rate control unit 11 based on a signal from the hot water supply temperature detection unit 12 and a signal from the hot water temperature control unit 14. In FIG. 2, reference numeral 16 denotes a rotation speed control type hot water supply circulation pump. Reference numeral 17 denotes a rotation speed control unit that controls the rotation speed of the hot water supply circulation pump 16. Reference numeral 18 denotes an operation control unit, which receives a signal from the hot water supply temperature detection unit 12 and a signal from the hot water temperature control unit 14 and sends a signal to the rotation speed control unit 17.
[0018]
The operation and operation of the above configuration will be described. In the embodiment shown in FIG. 1, in the hot water supply operation using the bathtub exhaust heat, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the hot water supply heater 2. On the other hand, the water in the hot water storage tank 5 flows into the hot water supply heat exchanger 7 by the hot water supply circulation pump 6, where the water is heated via the hot water supply heater 2 by the heat of condensation of the refrigerant and flows into the hot water storage tank 5. The condensed and liquefied refrigerant is decompressed by the decompression device 3 and flows into the exhaust heat utilization heat exchanger 4. On the other hand, the remaining hot water in the bathtub 8 flows into the bath heat exchanger 10 by the bath circulation pump 9, where the refrigerant flowing through the waste heat utilizing heat exchanger 4 via the bath heat exchanger 10 is evaporated and gasified. Then, the water temperature is lowered and flows into the bathtub 8. Further, the refrigerant that has been vaporized and gasified flows into the compressor 1 and operates in one cycle. At that time, the bath temperature detecting means 13 detects the water temperature of the bath circuit and sends a signal to the hot water setting means 14.
[0019]
Then, the operation control means 15 controls the flow rate control means 11 so that the signal of the hot water temperature detection means 12 becomes the same as the signal of the hot water temperature setting means 14, and controls the flow rate of the hot water supply circuit. In this case, the hot water temperature setting means 14 which has received the signal from the bath temperature detecting means 13 sets the water outlet temperature of the hot water supply heat exchanger 7 high when the water temperature of the bath circulation circuit is higher than a predetermined temperature, and Perform a hot water supply operation. Therefore, immediately after the bathing of all the family members is completed, since the remaining hot water temperature in the bathtub 8 is high, the low pressure of the compressor 1 is relatively high and the compressor 1 is operated with a small compression ratio. Therefore, even if the refrigerant is heated to high-temperature hot water, the refrigerant discharged from the compressor 1 has a low temperature, so that high-temperature boiling is possible. Particularly in winter, when the load of hot water supply is large, the amount of heat stored in the hot water increases due to high-temperature boiling, so that the fear of running out of hot water can be eliminated. In another embodiment shown in FIG. 2, a hot water supply circulation pump 16 is used instead of the flow rate control means 11, and the rotation speed control means 17 controls the rotation speed of the hot water supply circulation pump 16. The operation control means 18 receives a signal from the hot water supply temperature detection means 12 and a signal from the hot water temperature control means 14 and sends a signal to the rotation speed control means 17 to control the rotation speed of the hot water circulation pump 16 to control the flow rate. Therefore, the same effect can be obtained. Therefore, it is omitted in the following description.
[0020]
(Example 2)
Third Embodiment FIG. 3 is a configuration diagram of a heat pump bath hot water supply system according to a second embodiment of the present invention. In FIG. 3, reference numeral 19 denotes a refrigerant temperature detecting means for detecting a refrigerant inlet temperature of the exhaust heat utilizing heat exchanger 4. Reference numeral 20 denotes hot water temperature setting means, which receives a signal from the refrigerant temperature detecting means 19 and sets the water outlet temperature of the hot water supply heat exchanger 7. An operation control means 21 controls the flow rate control means 11 based on a signal from the hot water supply temperature detection means 12 and a signal from the hot water temperature setting means 20.
[0021]
The operation and operation of the above configuration will be described. In the hot water supply operation using the exhaust heat of the bathtub, the refrigerant state on the low pressure side of the heat pump cycle is detected by the refrigerant temperature detecting means 19 and a signal is sent to the hot water temperature setting means 20. Hot water setting means 20 sets the water outlet temperature of hot water supply heat exchanger 7 to a high temperature when the signal of refrigerant temperature detecting means 19 indicates a signal higher than a predetermined temperature. Then, the operation control means 21 controls the flow rate control means 11 so that the signal of the hot water supply temperature detection means 12 becomes the same as the signal of the hot water temperature setting means 20, so that high-temperature boiling is performed. Therefore, the operation is performed at the preset refrigerant temperature and hot water supply temperature, and the bath heat exchanger 10 and the bathtub 8 are connected and installed by diversifying the piping configuration (the number of bends) of the bath circulation circuit system and using long piping. In addition, high-temperature boiling can be performed while ensuring the reliability of the compressor 1.
[0022]
(Example 3)
FIG. 4 is a configuration diagram of a heat pump type bath hot water supply system according to Embodiment 3 of the present invention. In FIG. 4, reference numeral 22 denotes a discharge temperature detecting means for detecting a refrigerant discharge temperature of the compressor 1. 23 is a hot water temperature setting means, which receives the signal of the discharge temperature detecting means 22 and sets the water outlet temperature of the hot water supply heat exchanger 7. An operation control unit 24 controls the flow rate control unit 11 based on a signal from the hot water supply temperature detection unit 12 and a signal from the hot water temperature setting unit 23.
[0023]
The operation and operation of the above configuration will be described. In the hot water supply operation using the exhaust heat from the bathtub, the temperature of the remaining hot water in the bath circulation circuit is reduced as the operation proceeds. Therefore, the low pressure in the heat pump cycle gradually decreases, the compression ratio increases, and the refrigerant discharge temperature of the compressor 1 increases. Then, when the refrigerant discharge temperature reaches a predetermined temperature, the discharge temperature detecting means 22 sends a signal to the hot water temperature setting means 23 to set the water outlet temperature of the hot water supply heat exchanger 7 to a low temperature. The operation control means 24 controls the flow rate control means 11 so that the signal of the hot water temperature detection means 12 becomes the same as the signal of the hot water temperature setting means 23, and increases the flow rate of the hot water supply circuit. Accordingly, the amount of exhaust heat from the bathtub increases and the refrigerant discharge temperature of the compressor does not rise abnormally, so that the reliability and durability of the motor windings of the compressor and the like are improved.
[0024]
(Example 4)
FIG. 5 is a configuration diagram of a heat pump type bath hot water supply system according to Embodiment 4 of the present invention. In FIG. 5, reference numeral 25 denotes a variable rotation frequency compressor. Reference numeral 26 denotes an inverter power supply, which varies the rotation frequency of the compressor 25. Reference numeral 27 denotes a frequency control unit that controls the frequency of the inverter power supply unit 26 in response to a signal from the hot water temperature setting unit 14.
[0025]
The operation and operation of the above configuration will be described. In the hot water supply operation using the exhaust heat from the bathtub, the temperature of the remaining hot water in the bath circulation circuit is reduced as the operation proceeds. Then, when a signal indicating that the signal from the bath temperature detecting means 13 or the refrigerant temperature detecting means 19 shown in FIG. 3 has dropped to a predetermined temperature is transmitted, the hot water temperature setting means 14 sends a signal to the frequency control means 27. Then, the frequency control unit 27 sends a signal to the inverter power supply unit 26 to perform control to reduce the rotation frequency of the compressor 25. Therefore, since the rotation frequency of the compressor 25 is reduced along with the decrease in the temperature of the remaining hot water in the bathtub, the low pressure of the heat pump is increased again, and the operation can be performed at high temperature and high efficiency.
[0026]
(Example 5)
FIG. 6 is a configuration diagram of a heat pump type bath hot water supply system according to Embodiment 5 of the present invention. In FIG. 6, reference numeral 28 denotes a hot water supply switching valve, which switches a flow path from a hot water outlet of the hot water supply heat exchanger 7 to an upper portion of the hot water tank 5 and an intermediate position between the hot water tank 5. Reference numeral 29 denotes a valve control unit that controls the hot water supply switching valve 28 in response to a signal from the hot water temperature setting unit 14.
[0027]
The operation and operation of the above configuration will be described. In the hot water supply operation using the exhaust heat from the bathtub, when the temperature of the remaining hot water in the bathtub is high, for example, immediately after the completion of bathing, the hot water setting means 14 sets the high-temperature boiling, so that the high-temperature hot water flows out of the hot-water supply heat exchanger 7. Then, as the operation proceeds, the temperature of the remaining hot water in the bathtub decreases, and the hot water temperature setting means 14 switches to slightly lower the setting of the boiling temperature. Therefore, medium-temperature hot water having a slightly lower temperature than that at the time of the initial operation flows out of the hot water supply heat exchanger 7. The valve control unit 29 switches the hot water supply so that the hot water flowing out of the hot water supply heat exchanger 7 flows into the upper portion of the hot water storage tank 5 when the temperature is high, and the medium-temperature hot water flows into an intermediate position of the hot water storage tank 5. Control the valve 28. Therefore, hot water of different temperatures can be stored in the hot water storage tank 5, and hot water of a required temperature can be used depending on the application.
[0028]
(Example 6)
FIG. 7 is a configuration diagram of a heat pump bath hot water supply system according to Embodiment 6 of the present invention. In FIG. 7, reference numeral 30 denotes hot water storage temperature detecting means, which is provided in a plurality of positions inside or on the surface of the hot water storage tank 5, and detects hot water storage temperature. Reference numeral 31 denotes a hot water storage means for storing a signal from the hot water storage temperature detecting means 31 on the previous day. Reference numeral 32 denotes hot water temperature setting means, which receives a signal from the hot water storage temperature detecting means 30 and a signal from the hot water storage means 31 and sets the hot water temperature at the outlet of the hot water supply heat exchanger 7. An operation control unit 33 controls the flow rate control unit 11 based on a signal from the hot water temperature setting unit 32 and the hot water supply temperature detection unit 12.
[0029]
The operation and operation of the above configuration will be described. In the hot water supply operation using the exhaust heat from the bathtub, for example, at the start of the operation after all the family members finish bathing on that day, the hot water temperature setting means 32 first receives the signal of the hot water storage temperature detecting means 30 and the signal of the hot water storage means 31. The amount of hot water used in hot water storage tank 5 is determined, and when the use of hot water is increasing, the outlet hot water temperature of hot water supply heat exchanger 7 is set high. Then, the hot water supply operation using the bathtub exhaust heat is started. At that time, the operation control means 33 controls the flow rate control means 11 so that the signal from the hot water supply temperature detection means 12 becomes the same as the signal from the hot water temperature setting means 32. Therefore, the hot water flowing out of the outlet of the hot water supply heat exchanger 7 is stored from the upper part of the hot water storage tank 5 as hot water higher than the previous day. If it is determined that the amount of hot water used in hot water storage tank 5 is decreasing, hot water temperature setting means 32 sets the outlet hot water temperature of hot water supply heat exchanger 7 low. The operation control means 33 controls the flow rate control means 11 so that the signal from the hot water supply temperature detection means 12 becomes the same as the signal from the hot water temperature setting means 32. In this case, since the outlet hot water temperature of the hot water supply heat exchanger 7 is low, the operation can be performed with high efficiency. Further, heat loss from the hot water storage tank 5 is reduced. Accordingly, optimization of the amount of hot water stored and high-efficiency operation control can be performed according to the increase or decrease in the amount of hot water used.
[0030]
(Example 7)
FIG. 8 is a configuration diagram of a heat pump type bath hot water supply system according to Embodiment 7 of the present invention. In FIG. 8, reference numeral 34 denotes a bath flow rate control unit which controls the flow rate of the bath circulation circuit. Reference numeral 35 denotes a flow rate control unit which controls the bath flow rate control means 34 in response to a signal from the discharge temperature detection means 22.
[0031]
The operation and operation of the above configuration will be described. In the hot water supply operation using the exhaust heat of the bathtub in winter, the temperature of the remaining hot water in the bath circulation circuit decreases as the operation progresses, and the low pressure in the heat pump cycle gradually decreases. Therefore, the compression ratio of the compressor 1 increases, and the refrigerant discharge temperature of the compressor increases. Further, the discharge temperature detecting means 22 detects the refrigerant discharge temperature and sends a signal to the flow control unit 35. Then, upon receiving a signal indicating that the refrigerant discharge temperature has reached the predetermined temperature, the flow rate control unit 35 sends a signal to the bath flow rate control means 34 to control the bath flow rate control means 34 so as to increase the flow rate of the bath circulation circuit. Perform Therefore, the heat absorption increases, the low pressure of the compressor 1 increases, and the compression ratio decreases. Further, since the temperature difference between the water inlet and outlet of the bath heat exchanger 10 becomes small, the remaining hot water in the bath circulation system does not freeze, and can be used at a considerably low temperature. Therefore, the utilization of the remaining hot water in the bathtub increases.
[0032]
(Example 8)
FIG. 9 is a configuration diagram of a heat pump type hot water supply system according to Embodiment 8 of the present invention. Reference numeral 36 denotes a water supply temperature detecting means. Reference numeral 37 denotes a drainage opening / closing valve, which is provided in the bathtub 8. A control means 38 opens the drainage on-off valve 37 based on signals from the bath temperature detecting means 13 and the feed water temperature detecting means 36.
[0033]
The operation and operation of the above configuration will be described. In the hot water supply operation using the exhaust heat from the bathtub, the temperature of the remaining hot water in the bath circulation circuit gradually decreases as the operation proceeds, as the heat is absorbed. The bath temperature detecting means 13 detects the remaining hot water temperature and sends a signal to the control means 38. The control means 38 opens the drainage on-off valve 37 when the signal from the bath temperature detection means 13 and the signal from the water supply temperature detection means 36 become the same. Therefore, the hot water supply operation can be performed with high efficiency by using the remaining hot water of the bath, and the germs in the bath circulation system do not propagate.
[0034]
(Example 9)
FIG. 10 is a configuration diagram of a heat pump type bath hot water supply system according to Embodiment 9 of the present invention. Reference numeral 9 denotes a sterilizing means, which is connected to a bath circulation circuit, and sterilizes remaining hot water in the circuit by a heating source 40 at a high temperature. Reference numeral 41 denotes a sterilization end detection unit that detects the end of sterilization. Reference numeral 42 denotes a control unit which controls the sterilization unit 39 in response to a signal from the sterilization completion detection unit 41. An operation control unit 43 receives a signal from the control unit 42 and performs a heat pump hot water supply operation.
[0035]
The operation and operation of the above configuration will be described. In the hot water supply operation using the exhaust heat from the bathtub, first, the sterilization means 39 sterilizes the germs in the bath circulation circuit at a high temperature by the heating source 40. Then, the control unit 42 sends a signal from the sterilization end detection unit 41 to the operation control unit 43, and starts a hot water supply operation using bathtub exhaust heat. Therefore, the water in the bath circulation system can be reused, and water is saved. In addition, since high-temperature hot water after sterilization can be used for waste heat, high-efficiency hot water supply operation can be performed, and energy can be effectively used.
[0036]
(Example 10)
FIG. 11 is a configuration diagram of a heat pump type bath hot water supply system according to Embodiment 10 of the present invention. Reference numeral 44 denotes a heat exchanger utilizing natural heat, which utilizes atmospheric heat or solar heat. A four-way valve 45 switches the discharge refrigerant flow path of the compressor 1 between the hot water supply heater 2 and the natural heat utilizing heat exchanger 44. A waste heat utilizing heat exchanger 46 is provided in parallel with the natural heat utilizing heat exchanger 44. And one end thereof is connected to the low-pressure gas refrigerant pipe of the four-way valve 45. 47 is a refrigerant temperature detecting means for detecting the refrigerant inlet temperature of the heat exchanger 44 utilizing natural heat. Reference numeral 48 denotes an operation control unit which receives a signal from the refrigerant temperature detecting unit 47 and switches the refrigerant flow path of the four-way valve 45 from the compressor 1, the four-way valve 45, the natural heat utilizing heat exchanger 44, and the exhaust heat utilizing heat exchanger 46. The operation is performed in the refrigerant defrost circuit.
[0037]
The operation and operation of the above configuration will be described. In a hot water supply operation under frosting conditions such as winter, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the hot water supply heater 2 through the four-way valve 45. On the other hand, the water in the hot water storage tank 5 flows into the hot water supply heat exchanger 7 by the hot water supply circulation pump, where it is heated through the hot water supply heater 2 by the heat of condensation of the refrigerant and flows into the hot water storage tank 5. The condensed and liquefied refrigerant is decompressed by the decompression device 3 and flows into the natural heat utilizing heat exchanger 44, is vaporized and gasified, and flows into the compressor 1 through the four-way valve 45. In this operation, when frost is formed on the natural heat utilizing heat exchanger 44, the inlet refrigerant temperature decreases, and the amount of heat absorbed also decreases. The refrigerant temperature detecting means 47 detects that the inlet refrigerant temperature has dropped to a predetermined temperature and sends a signal to the operation control means 48. Then, the operation control means 48 switches the refrigerant flow path of the four-way valve 45 to operate in the refrigerant defrosting circuit. In this case, the gas refrigerant discharged from the compressor 1 flows into the natural heat utilizing heat exchanger 44 through the four-way valve 45. Then, the refrigerant is defrosted by the heat of condensation of the refrigerant, and flows into the waste heat utilizing heat exchanger 46 as a liquefied refrigerant. Here, the remaining hot water in the bathtub 8 sent by the bath circulation pump 9 flows into the bath heat exchanger 10, where the refrigerant flowing through the waste heat utilizing heat exchanger 46 via the bath heat exchanger 10 is converted into evaporative gas. To On the other hand, the evaporated gasified refrigerant flows into the compressor 1. Therefore, since the remaining hot water in the bathtub 8 is used during the defrosting operation, the defrost can be completed in a short time. In addition, since the configuration is simple, the number of components is small and the cost is low.
[0038]
(Example 11)
FIG. 12 is a configuration diagram of a heat pump hot water supply system according to Embodiment 11 of the present invention. In FIG. 12, reference numeral 49 denotes an auxiliary heat exchanger which is provided upstream of the natural heat utilizing heat exchanger 44 in the air flow direction and is connected to the bath circulation circuit. Reference numeral 50 denotes a flow control unit which controls flow of water in the bath circulation circuit to the auxiliary heat exchanger 49. Reference numeral 51 denotes a defrost control unit that controls the flow control unit 50 in response to a signal from the operation control unit 48.
[0039]
The operation and operation of the above configuration will be described. In the defrosting operation during the hot water supply operation, the operation control means 48 switches the four-way valve 45 to operate the defrosting circuit, and sends a signal to the defrost control means 51. Then, the defrost control means 51 controls the flow rate control means to flow the water in the bath circulation circuit to the auxiliary heat exchanger 49. Accordingly, since the natural heat utilizing heat exchanger 44 is defrosted by the condensation heat of the compressor 1 and the heat of the hot and cold water in the bath circuit, the defrost can be completed in a shorter time.
[0040]
(Example 12)
FIG. 13 is a configuration diagram of a heat pump type bath hot water supply system according to Embodiment 12 of the present invention. In FIG. 13, solid arrows indicate the flow direction of the wind.
[0041]
Reference numeral 52 denotes a refrigerant circuit, which includes a compressor 1, a four-way valve 45, a hot water supply heater 2, a pressure reducing means 3, and a natural heat utilizing heat exchanger 44 utilizing atmospheric heat or solar heat. Reference numeral 53 denotes a bath circulation circuit, which comprises a bathtub 8, a bath circulation pump 9, and an auxiliary heat exchanger 49. Numeral 54 denotes a blower, which blows the air so that the flow direction of the wind flows from the auxiliary heat exchanger 49 to the natural heat utilizing heat exchanger 44.
[0042]
The operation and operation of the above configuration will be described. In the hot water supply operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the hot water supply heater 2, where the water in the hot water storage tank 5 is heated via the hot water supply heater by the heat of condensation of the refrigerant. Then, the condensed and liquefied refrigerant is decompressed by the decompression device 3 and flows into the heat exchanger 44 utilizing natural heat. On the other hand, the remaining hot water in the bathtub 8 flows into the auxiliary heat exchanger 49 by the bath circulation pump 9 and radiates heat to the air sucked by the blowing means 54 here. Then, the heated atmosphere heats the refrigerant flowing inside when passing through the natural heat utilizing heat exchanger 44 downwind to evaporate the refrigerant. Therefore, since the natural heat utilizing heat exchanger 44 absorbs the atmospheric heat having a higher enthalpy than the atmospheric heat of the outside air, a high-temperature and high-efficiency hot water supply operation becomes possible. In addition, especially during an operation in which the outside air temperature is low in winter, frost formation is less likely to occur in the heat exchanger 44 utilizing natural heat, so that the operation can be performed with high efficiency and high efficiency.
As is clear from the above description, the effects of each embodiment are summarized as follows.
[0043]
(1) In the hot water supply operation using the exhaust heat from the bathtub, a flow rate control means for controlling a flow rate of the hot water supply circuit, a hot water supply temperature detection means for detecting a water outlet temperature of the hot water supply heat exchanger, and a water temperature detection of the bath circulation circuit Bath temperature detecting means, a hot water temperature setting means for receiving a signal from the bath temperature detecting means, and setting a hot water temperature at a water outlet of the hot water supply heat exchanger; and a signal from the hot water temperature setting means and the hot water temperature detecting means. Operation control means for controlling the flow rate control means based on a signalThe water temperature of the bath circulation circuit is detected, and when the temperature is higher than a predetermined temperature, the outlet temperature of the hot water supply heat exchanger is set higher, and the hot water supply circuit is set so that the hot water temperature becomes the hot water set temperature. Since the flow rate is controlled and the boiling water temperature is raised to store the hot water when the temperature of the remaining hot water in the bathtub is high, the amount of hot water stored increases.
[0044]
(2) Refrigerant temperature detecting means for detecting the refrigerant temperature of the refrigerant circuitAnd the hot water supply heat exchangerwaterHot water temperature setting means for setting the outlet hot water temperature, and operation control means for controlling the flow rate control means based on the signal of the hot water temperature setting means and the signal of the hot water supply temperature detection means, in the hot water supply operation using the bathtub exhaust heat, When the refrigerant temperature on the low pressure side of the refrigerant circuit is detected and the temperature is higher than a predetermined temperature, the outlet water temperature of the hot water supply heat exchanger is set higher, and the flow rate of the hot water supply circuit is controlled so that the hot water temperature becomes the set temperature. By doing so, it will be operated at the preset refrigerant temperature and hot water supply temperature, diversify the piping configuration (number of bends) of the bath circulation circuit system, and connect and install the bath heat exchanger and bathtub with long piping. However, high-temperature boiling can be performed while ensuring the reliability of the compressor.In addition, as the amount of waste heat from the bathtub increases, the refrigerant discharge temperature of the compressor rises abnormally. Since there is no compressor, the reliability and durability of the motor windings of the compressor are improved.
[0045]
(3) Variable rotation frequency based on water temperature of bath circulation circuitCompressorAccording toIn the hot water supply operation using the exhaust heat from the bathtub, the temperature of the remaining hot water in the bath circulation circuit and the saturated refrigerant temperature corresponding to the low pressure of the refrigerant circuit decrease as the operation proceeds. Then, when the bath temperature or the refrigerant temperature is reduced to a predetermined temperature, control is performed to reduce the rotation frequency of the compressor, and the rotation frequency of the compressor is reduced with the decrease in the bathtub remaining hot water temperature, so that the low pressure of the refrigerant circuit increases again, It can be operated at high temperature and high efficiency.
[0046]
(4) A hot water supply switching valve for switching a flow path from a hot water outlet of a hot water supply heat exchanger to an upper portion of the hot water tank and an intermediate position between the hot water tank and a valve control unit for controlling the hot water supply switching valve in response to a signal from the hot water temperature setting means. In hot water supply operation using bath tub exhaust heat, the valve control unit makes the hot water flowing out of the hot water supply heat exchanger flow into the upper part of the hot water tank when the temperature is high, and the medium-temperature hot water is located at the middle position of the hot water tank. The hot water supply switching valve is controlled so as to flow. Therefore, since hot water having different temperatures can be stored in the hot water storage tank, a hot water temperature suitable for the application can be used.
[0047]
(5) A plurality of hot-water storage temperature detecting means provided in the hot-water storage tank, a hot-water storage means for storing a signal of the hot-water storage temperature detecting means of the previous day, and a hot-water supply heat exchange in response to the signal of the hot-water storage temperature detecting means and the signal of the hot water storage means. Hot water setting means for setting the hot water temperature at the outlet of the vessel, and operation control means for controlling the flow rate control means from the signal of the hot water setting means and the signal of the hot water supply temperature detecting means. The amount of hot water in the hot water storage tank is determined from the signal of the hot water storage means and the signal of the hot water storage temperature detecting means, and when the hot water usage increases, the hot water setting means sets the outlet hot water temperature of the hot water supply heat exchanger to a high temperature and operates. Perform Conversely, when the amount of hot water used decreases, the outlet hot water temperature of the hot water supply heat exchanger is set low to perform high-efficiency operation. Therefore, according to the increase / decrease of the amount of hot water used, the amount of hot water stored can be optimized and high-efficiency operation control can be performed.
[0048]
(6) A discharge temperature detecting means for detecting a refrigerant discharge temperature of the compressor, a bath flow rate controlling means for controlling a flow rate of the bath circulation circuit, and a flow rate control for controlling a bath flow rate controlling means in response to a signal from the discharge temperature detecting means. In the hot water supply operation using the exhaust heat from the bathtub in winter, the temperature of the remaining hot water in the bath circuit decreases and the refrigerant discharge temperature of the compressor increases with the progress of the operation. When the refrigerant discharge temperature reaches a predetermined temperature, the bath flow rate control means is controlled so as to increase the flow rate of the bath circulation circuit, so that the heat absorption increases, the low pressure of the compressor increases, and the refrigerant discharge temperature increases. descend. Further, since the temperature difference between the outlet and the inlet of the water of the bath heat exchanger becomes small, the remaining hot water in the bath circulation system does not freeze and can be used at a considerably low temperature. Therefore, the utilization of the remaining hot water in the bathtub increases.
[0049]
(7) Bath temperature detection means provided in the bath circulation circuit, supply water temperature detection means for detecting supply water temperature, drainage opening / closing valve provided in the bathtub, drainage opening / closing based on signals from the bath temperature detection means and supply water temperature detection means. Equipped with control means to open the valve, in the hot water supply operation using the exhaust heat of the bathtub, the temperature of the remaining hot water in the bath circulation circuit decreases as the operation progresses, and when it reaches the same temperature as the supply water temperature, the drainage on-off valve is opened to drain water Therefore, the hot water supply operation can be performed with high efficiency by using the remaining hot water in the bath, and the propagation of various bacteria in the bath circulation system can be suppressed.
[0050]
(8) Sterilization means for sterilizing the hot water in the bath circulation circuit at high temperature, sterilization end detection means for detecting the end of sterilization, a control unit for controlling the sterilization means in response to a signal from the sterilization end detection means, and a signal from the control unit An operation control unit that performs a heat pump hot water supply operation by the refrigerant circuit in response to the heat, and in the hot water supply operation using the bathtub exhaust heat, first sterilizes various bacteria in the bath circulation circuit at high temperature, and after the sterilization is completed, performs the hot water supply operation using the bathtub exhaust heat. To start, the water in the bath circulation system can be reused, saving water. In addition, hot water after sterilization isBecause it can be used, high-efficiency hot water supply operation is possible, and energy can be used effectively.
[0051]
(9) A refrigerant hot water supply circuit comprising a compressor, a four-way valve, a hot water supply heater, a pressure reducing means, a heat exchanger utilizing natural heat utilizing atmospheric heat or solar heat, and a heat exchanger utilizing natural heat provided in parallel with one end having a four-way end. Exhaust heat utilization heat exchanger connected to the low pressure gas refrigerant pipe of the valve, hot water supply circuit connecting hot water storage tank, hot water supply circulation pump, hot water supply heat exchanger having heat exchange relationship with hot water supply heater, bathtub, bath circulation pump A bath circulation circuit connecting a bath heat exchanger having a heat exchange relationship with the waste heat utilizing heat exchanger, a refrigerant temperature detecting means for detecting a refrigerant inlet temperature of the natural heat utilizing heat exchanger, and a signal of the refrigerant temperature detecting means In response to this, the refrigerant flow path of the four-way valve is provided with an operation control means that operates with a refrigerant defrost circuit consisting of a compressor, a four-way valve, a heat exchanger using natural heat, and a heat exchanger using waste heat, so that frost formation in winter etc. Use of natural heat in hot water supply operation under conditions Detects that the frost has formed on the exchanger and the inlet refrigerant temperature has dropped to a predetermined temperature, switches the refrigerant flow path of the four-way valve, and uses the residual heat of the bathtub to condense heat of the compressor to use natural heat. Since the defrosting of the exchanger is performed, the defrosting can be completed in a short time, and the hot water supply operation time and the heating capacity increase. In addition, since the configuration is simple, the number of components is small and the cost is low.
[0052]
(10) An auxiliary heat exchanger provided upstream of the natural heat utilizing heat exchanger in the air flow direction and connected to the bath circulation circuit, and a flow control means for controlling flow of water in the bath circulation circuit to the auxiliary heat exchanger. A defrost control unit that receives a signal from the operation control unit and controls the flow rate control unit.In the defrosting operation during the hot water supply operation, frost occurs on the heat exchanger using natural heat and the inlet refrigerant temperature reaches a predetermined temperature. Upon detection of the decrease, the refrigerant flow path of the four-way valve is switched to perform the defrosting operation, and the water in the bath circulation circuit flows to the auxiliary heat exchanger. Therefore, the natural heat utilizing heat exchanger is defrosted by the condensing heat of the compressor and the heat of the hot and cold water in the bath circuit, so that the defrosting can be completed in a shorter time.
[0053]
(11) Refrigerant hot water supply circuit composed of a compressor, a four-way valve, a hot water heater, a pressure reducing means, a heat exchanger utilizing natural heat utilizing atmospheric heat or solar heat, and a hot water supply having a heat exchange relationship with a hot water storage tank and a hot water heater. A hot water supply circuit to which an exchanger is connected, an auxiliary heat exchanger provided upstream of the natural heat use heat exchanger in the air flow direction, and a bath circulation circuit including a bathtub, a bath circulation pump, and an auxiliary heat exchanger. In operation, since the remaining hot-water heat of the bathtub flows to the auxiliary heat exchanger to heat the natural-heat-utilizing heat exchanger in addition to atmospheric heat or solar heat as a heat source, high-temperature high-efficiency hot water supply operation becomes possible. In particular, during the operation in which the outside air temperature is low in winter, frost formation is less likely to occur in the heat exchanger using natural heat, so that high-performance and high-efficiency operation is possible.
[0054]
【The invention's effect】
As described above, according to the present invention, the water temperature of the bath circulation circuit is detected, and when the temperature is higher than a predetermined temperature, the outlet temperature of the hot water supply heat exchanger is set higher, and the hot water supply temperature is set to the hot water set temperature. The flow rate of the hot water supply circuit is controlled such that when the remaining hot water temperature of the bathtub is high, the boiling water temperature is raised and the hot water is stored.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a heat pump type bath hot water supply system according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing another flow control method of the heat pump type hot water supply system.
FIG. 3 is a configuration diagram of a heat pump type bath hot water supply system according to a second embodiment of the present invention.
FIG. 4 is a configuration diagram of a heat pump type bath hot water supply system according to a third embodiment of the present invention.
FIG. 5 is a configuration diagram of a heat pump type bath hot water supply system according to a fourth embodiment of the present invention.
FIG. 6 is a configuration diagram of a heat pump type bath hot water supply system according to a fifth embodiment of the present invention.
FIG. 7 is a configuration diagram of a heat pump type bath hot water supply system according to a sixth embodiment of the present invention.
FIG. 8 is a configuration diagram of a heat pump type bath hot water supply system according to a seventh embodiment of the present invention.
FIG. 9 is a configuration diagram of a heat pump type bath hot water supply system according to an eighth embodiment of the present invention.
FIG. 10 is a configuration diagram of a heat pump type hot water supply system according to Embodiment 9 of the present invention.
FIG. 11 is a configuration diagram of a heat pump type bath hot water supply system according to Embodiment 10 of the present invention.
FIG. 12 is a configuration diagram of a heat pump type hot water supply system according to Embodiment 11 of the present invention.
FIG. 13 is a configuration diagram of a heat pump type hot water supply system according to Embodiment 12 of the present invention.
FIG. 14 is a configuration diagram of a conventional heat pump system.
[Explanation of symbols]
1,25 compressor
2 Hot water heater
3 Decompression device
4,46 Exhaust heat utilization heat exchanger
5 Hot water storage tank
6,16 Hot water supply circulation pump
7 Hot water supply heat exchanger
8 Bathtub
9 Bath circulation pump
10 Bath heat exchanger
11 Flow control means
12 Hot water supply temperature detection means
13 Bath temperature detection means
14, 20, 23, 32 hot water temperature setting means
15, 18, 21, 24, 33, 48 Operation control means
17 Speed control means
19, 47 refrigerant temperature detecting means
22 Discharge temperature detecting means
26 Inverter power supply
27 Frequency control means
28 Hot water supply switching valve
29 Valve control unit
30 Hot water storage temperature detection means
31 Hot water storage means
34 Bath flow control means
35 Flow control unit
36 Water supply temperature detecting means
37 Drain valve
38 control means
39 Sterilization means
40 heating source
41 Sterilization completion detection means
42 control unit
43 Operation control unit
44 Natural heat heat exchanger
45 Four-way valve
49 Auxiliary heat exchanger
50 Flow control means
51 Defrost control means
52 refrigerant circuit
53 Bath circulation circuit
54 Blowing means

Claims

圧縮機を有する冷媒回路と、前記冷媒回路に接続した給湯加熱器および排熱利用熱交換器と、貯湯槽の湯水が流動し、前記給湯加熱器と熱交換関係を有する給湯熱交換器を途中に接続した給湯回路と、風呂循環ポンプを介して浴槽の湯水を循環させるとともに、前記排熱利用熱交換器と熱交換関係を有する風呂熱交換器を途中に接続した風呂循環回路と、前記給湯熱交換器の水出口温度を検出する給湯温度検知手段と、前記風呂循環回路の水温を検出する風呂温度検知手段と、前記風呂温度検知手段の信号を受けて前記給湯熱交換器の水出口湯温を設定する湯温設定手段とを備え、前記湯温設定手段の信号と前記給湯温度検知手段の信号に基づき前記給湯回路の流量制御をおこなうヒートポンプ式風呂給湯システム。 A refrigerant circuit having a compressor, a hot water supply heater and a waste heat utilization heat exchanger connected to the refrigerant circuit, and hot water in a hot water tank flows, and the hot water supply heat exchanger having a heat exchange relationship with the hot water supply heater is disposed in the middle. a hot water supply circuit connected to, via a bath circulation pump with circulating hot water bath, and the bath circulation circuit connected to the middle of the bath heat exchanger having a waste heat utilization heat exchanger and the heat exchange relationship, the hot water supply Hot water supply temperature detecting means for detecting a water outlet temperature of the heat exchanger, bath temperature detecting means for detecting a water temperature of the bath circulation circuit, and a water outlet hot water of the hot water supply heat exchanger in response to a signal from the bath temperature detecting means. A heat pump type bath hot water supply system comprising hot water temperature setting means for setting a temperature, and controlling flow rate of the hot water supply circuit based on a signal from the hot water temperature setting means and a signal from the hot water temperature detecting means.

流量制御をおこなう流量制御手段を給湯回路に接続した請求項１記載のヒートポンプ式風呂給湯システム。 The heat pump type bath hot water supply system according to claim 1, wherein flow rate control means for performing flow rate control is connected to the hot water supply circuit .

給湯回路に接続した給湯循環ポンプの回転制御を行うことで流量制御を行うようにした請求項１記載のヒートポンプ式風呂給湯システム。 2. The heat pump bath hot water supply system according to claim 1, wherein the flow rate control is performed by controlling the rotation of a hot water circulation pump connected to the hot water supply circuit .

圧縮機を有する冷媒回路と、前記冷媒回路に接続した給湯加熱器および排熱利用熱交換器と、貯湯槽の湯水が流動し、前記給湯加熱器と熱交換関係を有する給湯熱交換器を途中に接続した給湯回路と、風呂循環ポンプを介して浴槽の湯水を循環させるとともに、前記排熱利用熱交換器と熱交換関係を有する風呂熱交換器を途中に接続した風呂循環回路と、前記給湯熱交換器の水出口温度を検出する給湯温度検知手段と、前記冷媒回路の冷媒温度を検出する冷媒温度検知手段と、前記冷媒温度検知手段の信号を受けて前記給湯熱交換器の水出口湯温を設定する湯温設定手段と、前記湯温設定手段の信号と前記給湯温度検知手段の信号に基づき前記給湯回路の流量制御をおこなうヒートポンプ式風呂給湯システム。 Way a refrigerant circuit having a compressor, a hot water heater and waste heat utilization heat exchanger connected to the refrigerant circuit, the hot water of the hot water storage tank to flow, the hot-water supply heat exchanger with the hot water heater heat exchange relationship A hot water supply circuit connected to the hot water supply , a hot water supply in the bath tub is circulated through a hot water circulation pump , and a hot water supply circuit having a heat exchange relationship with the waste heat utilizing heat exchanger is connected in the middle of the hot water supply circuit. Hot water supply temperature detecting means for detecting a water outlet temperature of the heat exchanger, refrigerant temperature detecting means for detecting a refrigerant temperature of the refrigerant circuit, and a water outlet hot water of the hot water supply heat exchanger in response to a signal from the refrigerant temperature detecting means. A hot-water bath setting system for controlling a flow rate of the hot water supply circuit based on a hot water temperature setting means for setting a temperature and a signal from the hot water temperature setting means and a signal from the hot water temperature detecting means .

冷媒温度検知手段は、排熱利用熱交換器の冷媒入口温度を検出する請求項４記載のヒートポンプ式風呂給湯システム。 The heat pump type bath hot water supply system according to claim 4 , wherein the refrigerant temperature detection means detects a refrigerant inlet temperature of the exhaust heat utilization heat exchanger .

冷媒温度検知手段は、圧縮機の冷媒吐出温度を検知する請求項４記載のヒートポンプ式風呂給湯システム。 The heat pump type hot water supply system according to claim 4 , wherein the refrigerant temperature detecting means detects a refrigerant discharge temperature of the compressor .

圧縮機は、風呂循環回路の水温に基づいて回転数を可変とする請求項１から６のいずれか１項に記載のヒートポンプ式風呂給湯システム。 The heat pump bath hot water supply system according to any one of claims 1 to 6 , wherein the compressor changes a rotation speed based on a water temperature of the bath circulation circuit .

圧縮機の回転周波数を可変するインバータ電源部と、湯温設定手段の信号に基づき前記インバータ電源部の周波数を制御する周波数制御手段とを備える請求項７記載のヒートポンプ式風呂給湯システム。Heat pump bath hot-water supply system according to claim 7, further comprising an inverter power supply unit for varying the rotational frequency of the compressor, and a frequency control means for controlling the frequency of the inverter power supply unit based on a signal hot water temperature setting means.

給湯熱交換器の湯出口から貯湯槽上部と前記貯湯槽の中間位置へ流路の切り替えをおこなう給湯切り替え弁と、湯温設定手段の信号を受けて前記給湯切り替え弁を制御する弁制御部とを備える請求項１から６のいずれか１項に記載のヒートポンプ式風呂給湯システム。 A hot water supply switching valve for switching a flow path from a hot water outlet of a hot water supply heat exchanger to an upper portion of the hot water storage tank and an intermediate position of the hot water storage tank, and a valve control unit that receives the signal of the hot water temperature setting means and controls the hot water supply switching valve. heat pump bath hot-water supply system according to any one of claims 1 to 6, comprising a.

貯湯槽に設けた貯湯温度検知手段と、前日の前記貯湯温度検知手段の信号を記憶する湯量記憶手段と、前記貯湯温度検知手段の信号と前記湯量記憶手段の信号を受けて給湯熱交換器の出口湯温を設定する湯温設定部とを備え、
運転制御手段は、前記湯温設定部の信号と給湯温度検知手段の信号に基づき流量制御手段の制御をおこなう請求項２に記載のヒートポンプ式風呂給湯システム。 A hot-water storage temperature detecting means provided in the hot-water storage tank, a hot-water storage means for storing a signal of the hot-water storage temperature detecting means of the previous day, and a hot-water supply heat exchanger which receives the signal of the hot-water storage temperature detecting means and the signal of the hot-water storage means. and a hot water temperature setting unit for setting an outlet water temperature,
The heat pump bath hot water supply system according to claim 2 , wherein the operation control means controls the flow rate control means based on a signal from the hot water temperature setting unit and a signal from the hot water supply temperature detecting means.

圧縮機の冷媒吐出温度を検知する吐出温度検知手段と、風呂循環回路の流量制御をおこなう風呂流量制御手段と、前記吐出温度検知手段の信号を受けて前記風呂流量制御手段を制御する流量制御部とを備える請求項１から３のいずれか１項に記載のヒートポンプ式風呂給湯システム。 Discharge temperature detection means for detecting the refrigerant discharge temperature of the compressor, bath flow control means for controlling the flow rate of the bath circuit, and a flow control unit for controlling the bath flow control means in response to a signal from the discharge temperature detection means heat pump bath hot-water supply system according to any one of claims 1 3 comprising and.

給水温度を検知する給水温度検知手段と、残湯水の排水を行う排水開閉弁と、風呂温度検知手段と前記給水温度検知手段の信号に基づき前記排水開閉弁を開放する制御手段とを備える請求項１から３のいずれか１項に記載のヒートポンプ式風呂給湯システム。 A water supply temperature detection means for detecting a water supply temperature, a drainage opening / closing valve for draining residual hot water, and a control means for opening the drainage opening / closing valve based on signals from a bath temperature detection means and the water supply temperature detection means. heat pump bath hot-water supply system according to any one of 1 to 3.

風呂循環回路内の湯を高温滅菌する滅菌手段と、滅菌終了を検出する滅菌終了検出手段と、前記滅菌終了検出手段の信号を受けて前記滅菌手段を制御する制御部とを備え、運転制御手段は、前記制御部の信号を受けて冷媒回路によるヒートポンプ給湯運転をおこなう請求項２または３に記載のヒートポンプ式風呂給湯システム。 Operation control means, comprising: a sterilization means for sterilizing hot water in a bath circulation circuit at a high temperature; a sterilization end detection means for detecting the end of sterilization; and a control unit for controlling the sterilization means by receiving a signal from the sterilization end detection means The heat pump bath hot water supply system according to claim 2 , wherein the heat pump hot water supply operation is performed by a refrigerant circuit in response to a signal from the control unit.