JP3632401B2

JP3632401B2 - Heat pump bath water supply system

Info

Publication number: JP3632401B2
Application number: JP28810997A
Authority: JP
Inventors: 竹司渡辺; 志郎竹下
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1997-10-21
Filing date: 1997-10-21
Publication date: 2005-03-23
Anticipated expiration: 2017-10-21
Also published as: JPH11118246A

Description

【０００１】
【発明の属する技術分野】
本発明はヒートポンプ式風呂給湯システムに関するものである。
【０００２】
【従来の技術】
従来、この種のヒートポンプは特開平７−７１８３９号公報に示すものがある。以下、従来の技術について図面に基づき説明する。図８は従来のヒートポンプシステムの構成図である。図８において、浴槽廃熱利用給湯運転において、開閉弁５０ａと５０ｄを開放して、廃熱利用熱交換器６を介して浴槽の湯を集熱し、凝縮器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、浴槽廃熱利用時において、冷媒流量調整弁５１で減圧した冷媒は廃熱利用熱交換器６を高温で流れ、蒸発する。また、その際の冷媒圧力は蒸発温度同等の飽和圧力で動作する。一方、開閉弁５０ｅ、５０ｆが閉状態であるならば大気熱利用熱交換器４内の冷媒は外気温度と同温であるため、冷媒圧力は外気温度同等の飽和圧力となる。従って、冷媒流量調整弁５１で減圧した冷媒は圧力の低い大気熱利用熱交換器４へしだいに溜まり込み、廃熱利用熱交換器６を流れる冷媒循環量は少なくなって性能が低下するとともに圧縮機１のモーター温度および冷媒吐出温度が上昇する。また、開閉弁５０ｅ、５０ｆが開状態の場合においては、冬季の低外気温度に浴槽残湯温度が高い入浴完了直後に集熱運転をおこなえば、大気熱利用熱交換器４を流れる冷媒は外気温度より高温で流れるため、大気へ放熱する。よって、浴槽廃熱と大気熱を同時に集熱できない。
【０００４】
本発明は上記課題を解決するものであり、浴槽廃熱と大気熱を同時集熱あるいは浴槽廃熱を高効率で集熱して、省エネルギー化および集熱量増加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、凝縮器、大気熱あるいは太陽熱を集熱する蒸発器と、前記蒸発器と並列に設けた熱回収熱交換器と、前記蒸発器および前記熱回収熱交換器へ冷媒の流れを制御する流路制御手段と、貯湯タンク、前記凝縮器と熱交換関係を有する給湯熱交換器を有する給湯回路と、前記熱回収熱交換器と熱交換関係を有する風呂熱交換器を有する風呂回路と、前記蒸発器での集熱を検出する第１の集熱検出手段と、前記熱回収熱交換器での集熱を検出する第２の集熱検出手段と、前記流路制御手段を制御する運転制御手段を有するヒートポンプ式風呂給湯システムであって、前記運転制御手段は、前記第１の集熱検出手段および前記第２の集熱検出手段の信号を受けて前記流路切換え手段を制御して、前記運転制御手段は、前記流路切換え手段を制御して、蒸発器と熱回収交換器のいづれか、または蒸発器かつ熱回収交換器に同時に前記冷媒を流すように流路を切換えることを特徴とするヒートポンプ式風呂給湯システムである。
【０００６】
以上の構成により、蒸発器および熱回収熱交換器へ冷媒が流れる際に、蒸発器の大気熱集熱を第１の集熱検出手段で、熱回収熱交換器の浴槽残湯集熱を第２の集熱検出手段で検出して、浴槽残湯熱と大気熱を同時に集熱する。また、冬季の低外気温度で入浴完了直後など浴槽残湯温度が高温時に集熱運転をおこなう場合には、蒸発器で大気熱集熱しない場合がある。その際には大気熱集熱しないことを検出して、蒸発器へ冷媒を流さないようにして熱回収熱交換器単独で集熱運転をおこなう。また、夏季など高外気温度時においては、集熱運転時間経過とともに浴槽残湯温度が外気温度よりも低下して、熱回収熱交換器を流れる冷媒が浴槽残湯温度よりも高温になる場合がある。その際には、熱回収熱交換器で浴槽残湯集熱しないことを検出して、熱回収熱交換器へ冷媒を流さないようにして蒸発器で大気熱集熱する。従って、浴槽残湯熱と大気熱を同時に集熱できる場合には、同時集熱して高集熱高効率運転をおこない、同時集熱できない場合には、蒸発器と熱回収熱交換器のいづれか集熱できる熱交換器に冷媒を流すように冷媒流路を切り替えて運転をおこない、集熱量増加と機器の信頼性を向上する。
【０００７】
【発明の実施の形態】
本発明は上記目的を達成するため各請求項記載のような形態によって実施できる。
【０００８】
請求項１記載の発明は、圧縮機、凝縮器、大気熱あるいは太陽熱を集熱する蒸発器と、前記蒸発器と並列に設けた熱回収熱交換器と、前記蒸発器および前記熱回収熱交換器へ冷媒の流れを制御する流路制御手段と、貯湯タンク、前記凝縮器と熱交換関係を有する給湯熱交換器を有する給湯回路と、前記熱回収熱交換器と熱交換関係を有する風呂熱交換器を有する風呂回路と、前記蒸発器での集熱を検出する第１の集熱検出手段と、前記熱回収熱交換器での集熱を検出する第２の集熱検出手段と、前記流路制御手段を制御する運転制御手段を有するヒートポンプ式風呂給湯システムであって、前記運転制御手段は、前記第１の集熱検出手段および前記第２の集熱検出手段の信号を受けて前記流路切換え手段を制御して、前記運転制御手段は、前記流路切換え手段を制御して、蒸発器と熱回収交換器のいづれか、または蒸発器かつ熱回収交換器に同時に前記冷媒を流すように流路を切換えることを特徴とするヒートポンプ式風呂給湯システムである。
【０００９】
また、請求項２記載の発明は、圧縮機、凝縮器、大気熱あるいは太陽熱を集熱する蒸発器と、前記蒸発器と並列に設けた熱回収熱交換器と、前記蒸発器および前記熱回収熱交換器へ冷媒の流れを制御する流路制御手段と、貯湯タンク、前記凝縮器と熱交換関係を有する給湯熱交換器を有する給湯回路と、前記熱回収熱交換器と熱交換関係を有する風呂熱交換器を有する風呂回路と、前記蒸発器での冷媒入口温度検出手段と、外気温度検出手段と、前記熱回収熱交換器の冷媒入口温度検出手段と、風呂温度検出手段と、前記流路制御手段を制御する運転制御手段を有するヒートポンプ式風呂給湯システムであって、前記運転制御手段は、前記蒸発器での冷媒入口温度検出手段と、前記外気温度検出手段と、前記熱回収熱交換器の冷媒入口温度検出手段と、前記風呂温度検出手段からの信号に基づいて前記流路切換え手段を制御して、前記運転制御手段は、前記流路切換え手段を制御して、蒸発器と熱回収交換器のいづれか、または蒸発器かつ熱回収交換器に同時に前記冷媒を流すように流路を切換えることを特徴とするヒートポンプ式風呂給湯システムである。
【００１０】
そして、本実施の形態によれば、蒸発器および熱回収熱交換器へ冷媒が流れる際に、蒸発器の大気熱集熱を第１の集熱検出手段で検出するとともに、熱回収熱交換器の浴槽残湯集熱を第２の集熱検出手段で検出して、蒸発器と熱回収熱交換器ともに集熱する信号を受けた場合には、浴槽残湯熱と大気熱を同時に集熱する。また、冬季の低外気温度で入浴完了直後など浴槽残湯温度が高温時に集熱運転をおこなう場合には、熱回収熱交換器および蒸発器は高温冷媒が流れるため、蒸発器で大気熱集熱しない場合がある。その際には大気熱集熱しないことを検出して、蒸発器へ冷媒を流さないようにして熱回収熱交換器単独で集熱運転をおこなう。また、夏季など高外気温度時においては、集熱運転時間経過とともに浴槽残湯温度が外気温度よりも低下して、熱回収熱交換器を流れる冷媒が浴槽残湯温度よりも高温になる場合がある。その際には、熱回収熱交換器で浴槽残湯集熱しないことを検出して、熱回収熱交換器へ冷媒を流さないようにして蒸発器で大気熱集熱する。従って、浴槽残湯熱と大気熱を同時に集熱できる場合には、同時集熱して高集熱高効率運転をおこない、同時集熱できない場合には、蒸発器と熱回収熱交換器のいづれか集熱できる熱交換器に冷媒を流すように冷媒流路を切り替えて運転をおこない、集熱量増加と機器の信頼性を向上する。
【００１１】
また、請求項３記載の発明は請求項１記載の構成に加え、風呂回路に風呂ポンプを設け、第１の集熱検出手段の信号に基き前記風呂ポンプの流量を制御する流量制御手段をを備え、大気熱と浴槽残湯熱を同時に集熱する運転において、残湯温度が高いために大気熱集熱できない場合に、風呂ボンプの流量を低下させて熱回収熱交換器および蒸発器を流れる冷媒温度を下げ、大気熱を集熱できるようにする。従って、浴槽残湯熱回収と大気熱を同時集熱するため、蒸発器および熱回収熱交換器の小型化が実現できる。
【００１２】
また、請求項４記載の発明は請求項１記載の構成に加え、蒸発器近傍に送風機を設け、第２の集熱検出手段の信号に基き送風機の回転数を制御する送風機制御手段を備え、大気熱と浴槽残湯熱の同時集熱運転において、残湯温度が低いために浴槽残湯熱を集熱できない場合に、送風機の回転数を下げて、熱回収熱交換器および蒸発器を流れる冷媒温度を下げ、浴槽残湯熱を集熱できるようにする。従って、送風機の回転数制御といった簡単な構成で大気熱利用運転時に浴槽残湯熱も集熱できるようになり、蒸発器の小型化が実現できる。
【００１３】
また、請求項５記載の発明は請求項１記載の構成に加え、蒸発器の冷媒入口温度を検出する冷媒温度検出手段と、前記冷媒温度検出手段の信号を受けて流路制御手段を制御する低温運転制御手段をを備え、冬季の大気熱利用運転時において、蒸発器に着霜が生じはじめたことを蒸発器の冷媒入口温度で検出して、熱回収熱交換器にも冷媒を流し、蒸発器および熱回収熱交換器を流れる冷媒温度を上げて、蒸発器表面の霜を融解、または着霜の進行を遅くするため、大気熱と浴槽残湯熱の集熱量が増え、貯湯熱量が増加する。
【００１４】
また、請求項６記載の発明は請求項１記載の構成に加え、圧縮機の冷媒吐出温度を検出する吐出温度検出手段と、前記吐出温度検出手段の信号を受けて流路制御手段を制御する運転制御手段を備え、大気熱利用運転時あるいは浴槽残湯熱利用運転時において、圧縮機の冷媒吐出温度が異常上昇したことを検出して、蒸発器および熱回収熱交換器に冷媒を流し、圧縮機の吸入圧力上昇と吐出圧力を低下させて圧縮比を小さくして、冷媒吐出温度を下げるため、圧縮機の耐久性が向上する。
【００１５】
また、請求項７記載の発明は請求項１記載の構成に加え、熱回収熱交換器単独あるいは蒸発器単独で冷媒の蒸発作用をおこなう場合には、運転開始時に所定時間、蒸発器および風呂熱回収熱交換器ともに冷媒が流れないように流路制御手段を制御する運転制御手段を備え、浴槽残湯熱を利用して運転をおこなう場合において、運転初期に所定時間、流路制御手段を閉状態にして、蒸発器および熱回収熱交換器の内部に溜まった冷媒を圧縮機で回収して、浴槽残湯熱利用運転時に規定冷媒封入量でサイクル循環をおこなうため、性能および機器の信頼性が向上する。
【００１６】
また、請求項８記載の発明は請求項１記載の構成に加え、熱回収熱交換器の冷媒入口温度を検出する冷媒回収温度検出手段と、前記冷媒回収温度検出手段の信号を受けて前記風呂ポンプを最大流量に制御するポンプ制御手段を備え、浴槽残湯熱を利用して貯湯運転をおこなう場合において、残湯熱の回収終了を検出して、風呂熱交換器内を風呂ポンプの最大流量で循環させ、風呂熱交換器内のスケールなどを流出する。従って、風呂熱交換器内の目詰まりを防止できるため耐久性が向上する。
【００１７】
【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。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。
【００１８】
（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。図１において、実線矢印は大気熱あるいは太陽熱を利用する際の冷媒流れ方向を表し、破線は風呂廃熱を利用する際の冷媒流れ方向を表す。
【００１９】
１は圧縮機、２は凝縮器、３は第１の減圧手段、４は蒸発器であり、大気熱あるいは太陽熱を集熱する。５は第２の減圧手段、６は熱回収熱交換器であり、第１の減圧手段３および蒸発器４と並列に設けられている。７は流路制御手段であり、蒸発器４および熱回収熱交換器６への冷媒流れを制御する。８は貯湯タンク、９は給湯熱交換器であり、凝縮器２と熱交換関係を有する。１０は給湯回路であり、貯湯タンク８と給湯熱交換器９からなる。１１は浴槽、１２は風呂熱交換器であり、熱回収熱交換器６と熱交換関係を有する。１３は風呂回路であり、浴槽１１と風呂熱交換器１２からなる。１４は第１の集熱検出手段であり、蒸発器４の冷媒入口温度検出手段１５と外気温度検出手段１６の温度差から蒸発器４での集熱を検出する。１７は第２の集熱検出手段であり、熱回収熱交換器６の冷媒入口温度検出手段１８と風呂温度検出手段１９の温度差から熱回収熱交換器６での集熱を検出する。２０は運転制御手段であり、第１の集熱検出手段１４および第２の集熱検出手段１７の信号を受けて流路制御手段７を制御する。
【００２０】
以上の構成において、その動作、作用について説明する。
【００２１】
風呂廃熱と大気熱を同時集熱する運転において、冬季の低外気温度で入浴直後など浴槽残湯温度が高い場合の運転について述べる。圧縮機１から吐出した冷媒は凝縮器２に流入し、給湯熱交換器９を介して貯湯タンク８の水を加熱する。そして、凝縮液化した冷媒は第１の減圧手段３を通り蒸発器４へ流入する冷媒と、第２の減圧手段５を通り熱回収熱交換器６へ流入する冷媒に別れる。そして、蒸発器４へ流入する冷媒は大気熱あるいは太陽熱を集熱し、熱回収熱交換器６へ流入する冷媒は風呂熱交換器１２を介して浴槽１１の残湯熱を集熱する。そして、第１の集熱検出手段１４は蒸発器温度検出手段１５と外気温度検出手段１６の温度差から蒸発器４での集熱を検出する。また、第２の集熱検出手段１７は熱回収冷媒温度検出手段１８と風呂温度検出手段１９の温度差から熱回収熱交換器６での集熱を検出する。その際に、入浴直後など残湯温度が高い場合には熱回収熱交換器６を流れる冷媒は高温となるため、蒸発器４を流れる冷媒は外気温度よりも高温で流れて、第１の集熱検出手段１４は蒸発器４で集熱しないことを検出する。そして、運転制御手段２０は第１の集熱検出手段１４の信号を受けて、冷媒を蒸発器４へ流さないように流路制御手段７を制御する。そして、集熱運転時間経過とともに浴槽残湯温度が低下して、蒸発器４で集熱できる温度まで熱回収熱交換器６を流れる冷媒温度が低下すると第１の集熱検出手段１４は運転制御手段２０へ信号を送り、冷媒が蒸発器４へも流れるように流路制御手段７を制御する。そして、大気熱および浴槽残湯熱を同時集熱して高効率運転をおこなう。そして、集熱運転を継続して浴槽残湯温度がさらに低下して、熱回収熱交換器６を流れる冷媒が浴槽残湯温度よりも高温になると、第２の集熱検出手段１７は運転制御手段２０へ信号を送り、熱回収熱交換器６へ冷媒を流さないようにして蒸発器４で大気熱集熱をおこなう。従って、浴槽残湯熱と大気熱を同時に集熱できる場合には、同時集熱して高集熱高効率運転をおこない、同時集熱できない場合には、蒸発器と熱回収熱交換器のいづれか集熱できる熱交換器に冷媒を流すように冷媒流路を切り替えて運転をおこない、集熱量増加と機器の信頼性を向上する。
【００２２】
そして、蒸発器４出口と圧縮機１の途中に逆止弁２１を設けて、熱回収熱交換器６から流出した冷媒が蒸発器へ流れ込まないようにすれば、熱回収熱交換器６単独運転時の圧縮機１の耐久性はより向上する。
【００２３】
そして、圧縮機１、凝縮器２、蒸発器４、熱回収熱交換器６を１つのユニットに収納してユニット間の接続レス化をはかれば、冷媒の漏れがなく、移設時の冷媒放出もなくなるため、環境にやさしい機器となる。
【００２４】
（実施例２）
図２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２において、２２は風呂ポンプであり、前記風呂回路１３に備えられる。２３は流量制御手段であり、第１の集熱検出手段１４の信号に基き風呂ポンプ２１の流量を制御する。
【００２５】
以上の構成において、その動作、作用について説明する。
【００２６】
大気熱と浴槽残湯熱を同時に集熱する運転において、残湯温度が高いために大気熱集熱できないことを第１の集熱検出手段１４が検出して流量制御手段２３へ信号を送る。そして、流量制御手段２３は風呂ボンプ２１の流量を低下させる制御をおこない、熱回収熱交換器６および蒸発器４を流れる冷媒温度を外気温度よりも下げて、大気熱集熱する。従って、浴槽残湯熱回収と大気熱を同時集熱する運転時間が拡大できるとともに、蒸発器および熱回収熱交換器の小型化が実現できる。
【００２７】
（実施例３）
図３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３において、２４は送風機であり、前記蒸発器４に大気熱を強制的に送る。２５は送風機制御手段であり、第２の集熱検出手段１７の信号に基き送風機２４の回転数を制御する。
【００２８】
以上の構成において、その動作、作用について説明する。
【００２９】
大気熱と浴槽残湯熱を同時に集熱する運転において、残湯温度が低いために、浴槽残湯熱を集熱できないことを第２の集熱検出手段１７が検出して流量制御手段２３へ信号を送る。そして、送風機制御手段２５は送風機２４の回転数を下げて、熱回収熱交換器６および蒸発器４を流れる冷媒温度を下げ、浴槽残湯熱を集熱できるようにする。従って、送風機の回転数制御といった簡単な構成で大気熱利用運転時に浴槽残湯熱も集熱できるようになり、蒸発器の小型化が実現できる。
【００３０】
（実施例４）
図４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４において、２６は冷媒温度検出手段であり、蒸発器４の冷媒入口温度を検出する。２７は低温運転制御手段であり、冷媒温度検出手段２６の信号を受けて流路制御手段２３を制御する。
【００３１】
以上の構成において、その動作、作用について説明する。
【００３２】
冬季の大気熱利用運転時において、蒸発器４に着霜が生じはじめたことを冷媒温度検出手段２６が検出して、低温運転制御手段２７に信号を送る。そして、低温運転制御手段２７は熱回収熱交換器６に冷媒を流すように流路制御手段２３を制御する。従って、蒸発器４および熱回収熱交換器６を流れる冷媒温度は上昇して、蒸発器表面の霜が融解、または着霜の進行が遅くなるため大気熱と浴槽残湯熱の集熱量は増加して、貯湯熱量が増加する。
【００３３】
（実施例５）
図５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５において、２８は吐出温度検出手段であり、圧縮機１の冷媒吐出温度を検出する。２９は運転制御手段であり、吐出温度検出手段２８の信号を受けて流路制御手段２３を制御する。
【００３４】
以上の構成において、その動作、作用について説明する。大気熱利用運転時あるいは浴槽残湯熱利用運転時において、圧縮機１の冷媒吐出温度が異常上昇したことを吐出温度検出手段２８で検出して、運転制御手段２９は蒸発器４および熱回収熱交換器６に冷媒を流し、圧縮機１の吸入圧力を上昇、吐出圧力を低下して圧縮比を小さくする。従って、冷媒吐出温度が下がり、圧縮機の耐久性は向上する。
【００３５】
（実施例６）
図６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６において、３０は運転指令手段であり、熱回収熱交換器６単独あるいは蒸発器４単独で冷媒の蒸発作用をおこなう運転信号を発する。３１は運転制御手段であり、運転指令手段３０の信号受けて、所定時間、蒸発器４および熱回収熱交換器６ともに冷媒が流れないように流路制御手段２３を制御する。
【００３６】
以上の構成において、その動作、作用について説明する。
【００３７】
浴槽残湯熱を利用した運転において、運転開始時に圧縮機１を運転するとともに、凝縮器２から蒸発器４および熱回収熱交換器６へ冷媒が流れないように流路制御手段２３を所定時間、閉状態にする。そして、蒸発器４および熱回収熱交換器６内部に溜まった冷媒を圧縮機１で回収して凝縮器２へ流出する。そして、所定時間後に、流路制御手段２３を切り替えて圧縮機１、貯湯タンクの水を加熱する凝縮器２、浴槽残湯熱を集熱する熱回収熱交換器６を冷媒が循環するようにする。次に、大気熱を集熱する運転においては、蒸発器４および熱回収熱交換器６内部に溜まった冷媒を圧縮機１で回収して凝縮器２へ流出した所定時間後に、流路制御手段２２を切り替えて圧縮機１、貯湯タンク８の水を加熱する凝縮器２、大気熱を集熱する蒸発器４を冷媒が循環するようにする。従って、浴槽残湯熱利用運転時および大気熱利用運転時に規定冷媒封入量でサイクル循環をおこなうため、性能および機器の信頼性が向上する。
【００３８】
（実施例７）
図７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７において、３２は冷媒回収温度検出手段であり、熱回収熱交換器６の冷媒入口温度を検出する。３３はポンプ制御手段であり、冷媒回収温度検出手段３２の信号を受けて風呂ポンプ２２を最大流量に制御する。
【００３９】
以上の構成において、その動作、作用について説明する。浴槽残湯熱を利用して貯湯運転をおこなう場合において、残湯熱の回収終了を冷媒回収温度検出手段３２で検出して、ポンプ制御手段３３へ信号を送り、ポンプ制御手段３３は風呂ポンプ２２を最大流量で循環させる。そして、風呂熱交換器１２内を最大流速で流して、風呂熱交換器１２内のスケールなどを流出する。従って、風呂熱交換器内の目詰まりを防止でき、耐久性が向上する。尚、冷媒回収温度検出手段３２の代わりに風呂回路に設けた風呂温度検出手段３４で浴槽残湯温度を検出して、ポンプ制御手段３３へ信号を送り、風呂ポンプ２２を最大流量に制御しても同様の効果を得る。
【００４０】
【発明の効果】
以上の説明から明らかのように、本発明のヒートポンプ式風呂システムによれば次の効果を奏する。
【００４１】
浴槽残湯熱と大気熱を同時に集熱できる場合には、同時集熱して高集熱高効率運転をおこない、同時集熱できない場合には、蒸発器と熱回収熱交換器のいづれか集熱できる熱交換器に冷媒を流すように冷媒流路を切り替えて運転をおこない、集熱量増加と機器の信頼性を向上する。
【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】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３】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４】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５】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６】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７】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８】従来のヒートポンプシステムの構成図
【符号の説明】
１圧縮機
２凝縮器
３第１の減圧手段
４蒸発器
５第２の減圧手段
６熱回収熱交換器
７流路制御手段
８貯湯タンク
９給湯熱交換器
１０給湯回路
１１浴槽
１２風呂熱交換器
１３風呂回路
１４第１の集熱検出手段
１５蒸発器温度検出手段
１６外気温度検出手段
１７第２の集熱検出手段
１８熱回収冷媒温度検出手段
１９風呂温度検出手段
２０運転制御手段
２１逆止弁
２２風呂ポンプ
２３流量制御手段
２４送風機
２５送風機制御手段
２６冷媒温度検出手段
２７低温運転制御手段
２８吐出温度検出手段
２９運転制御手段
３０運転指令手段
３１運転制御手段
３２冷媒回収温度検出手段
３３ポンプ制御手段
３４風呂温度検出手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat pump bath hot water supply system.
[0002]
[Prior art]
Conventionally, this type of heat pump is disclosed in Japanese Patent Application Laid-Open No. 7-71839. Hereinafter, conventional techniques will be described with reference to the drawings. FIG. 8 is a configuration diagram of a conventional heat pump system. In FIG. 8, in the bathtub waste heat utilization hot water supply operation, the on-off valves 50a and 50d are opened, the bathtub hot water is collected via the waste heat utilization heat exchanger 6, and heated by the condenser 2 to be stored.
[0003]
[Problems to be solved by the invention]
However, in the conventional heat pump system, when the waste heat from the bathtub is used, the refrigerant depressurized by the refrigerant flow rate adjustment valve 51 flows through the waste heat utilization heat exchanger 6 at a high temperature and evaporates. The refrigerant pressure at that time operates at a saturation pressure equivalent to the evaporation temperature. On the other hand, if the on-off valves 50e and 50f are in the closed state, the refrigerant in the atmospheric heat utilizing heat exchanger 4 is at the same temperature as the outside air temperature, so the refrigerant pressure becomes a saturation pressure equivalent to the outside air temperature. Accordingly, the refrigerant decompressed by the refrigerant flow rate adjusting valve 51 gradually accumulates in the low-pressure atmospheric heat heat exchanger 4 and the circulation amount of the refrigerant flowing through the waste heat heat exchanger 6 decreases, resulting in a decrease in performance and compression. The motor temperature and the refrigerant discharge temperature of the machine 1 rise. Further, when the on-off valves 50e and 50f are in the open state, if the heat collecting operation is performed immediately after completion of the bathing in which the bath residual hot water temperature is high at the low outdoor temperature in winter, the refrigerant flowing through the atmospheric heat utilizing heat exchanger 4 is outside air. Dissipates heat to the atmosphere because it flows at a temperature higher than the temperature. Therefore, the bathtub waste heat and atmospheric heat cannot be collected simultaneously.
[0004]
The present invention solves the above-described problems, and mainly aims to save energy and increase the amount of heat collected by collecting the waste heat of the bathtub and the heat of the atmosphere simultaneously or collecting the waste heat of the bathtub with high efficiency.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a compressor, a condenser, an evaporator for collecting atmospheric heat or solar heat, a heat recovery heat exchanger provided in parallel with the evaporator, the evaporator and the heat. A flow path control means for controlling the flow of refrigerant to the recovered heat exchanger, a hot water storage tank, a hot water supply circuit having a hot water heat exchanger having a heat exchange relationship with the condenser, and a heat exchange relationship with the heat recovery heat exchanger. A bath circuit having a bath heat exchanger, first heat collection detecting means for detecting heat collection in the evaporator, and second heat collection detection means for detecting heat collection in the heat recovery heat exchanger. And a heat pump type hot water supply system having operation control means for controlling the flow path control means, wherein the operation control means outputs signals from the first heat collection detection means and the second heat collection detection means. receiving and controlling the flow path switching means, the operating system The means controls the flow path switching means to switch the flow path so that the refrigerant flows through either the evaporator or the heat recovery exchanger or simultaneously through the evaporator and the heat recovery exchanger. It is a bath hot water system.
[0006]
With the above configuration, when the refrigerant flows to the evaporator and the heat recovery heat exchanger, the atmospheric heat collection of the evaporator is detected by the first heat collection detection means, and the bath remaining hot water collection of the heat recovery heat exchanger is Detecting by the heat collecting detection means 2, the hot water from the bathtub and the atmospheric heat are collected simultaneously. In addition, when heat collection operation is performed when the bath remaining hot water temperature is high, such as immediately after completion of bathing at a low outdoor temperature in winter, atmospheric heat may not be collected by the evaporator. At that time, it is detected that the heat is not collected from the atmosphere, and the heat collecting heat exchanger alone performs the heat collecting operation without flowing the refrigerant to the evaporator. In addition, when the outdoor temperature is high, such as in summer, the remaining hot water temperature of the bathtub may decrease below the ambient temperature as the heat collection operation time elapses, and the refrigerant flowing through the heat recovery heat exchanger may become higher than the residual hot water temperature of the bathtub. is there. At that time, the heat recovery heat exchanger detects that the remaining hot water in the bathtub is not collected, and collects atmospheric heat in the evaporator without flowing the refrigerant to the heat recovery heat exchanger. Therefore, if the heat from the bath residual heat and the atmospheric heat can be collected at the same time, simultaneous heat collection is performed for high heat collection and high efficiency operation. If simultaneous heat collection is not possible, either the evaporator or the heat recovery heat exchanger is collected. Operation is performed by switching the refrigerant flow path so that the refrigerant flows through the heat exchanger that can be heated, thereby increasing the amount of heat collection and improving the reliability of the equipment.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The present invention can be carried out in the forms described in the claims to achieve the above object.
[0008]
The invention according to claim 1 includes a compressor, a condenser, an evaporator for collecting atmospheric heat or solar heat, a heat recovery heat exchanger provided in parallel with the evaporator, the evaporator and the heat recovery heat exchange. Flow path control means for controlling the flow of refrigerant to the heater, a hot water storage tank, a hot water supply circuit having a hot water heat exchanger having a heat exchange relationship with the condenser, and bath heat having a heat exchange relationship with the heat recovery heat exchanger A bath circuit having an exchanger, first heat collection detection means for detecting heat collection in the evaporator, second heat collection detection means for detecting heat collection in the heat recovery heat exchanger, and A heat pump type hot water supply system having an operation control means for controlling a flow path control means, wherein the operation control means receives the signals from the first heat collection detection means and the second heat collection detection means, and by controlling the flow path switching means, said operation control means, before A heat pump bath hot water system characterized by controlling the flow path switching means and switching the flow path so that the refrigerant flows through the evaporator and the heat recovery exchanger at the same time. is there.
[0009]
The invention according to claim 2 is a compressor, a condenser, an evaporator for collecting atmospheric heat or solar heat, a heat recovery heat exchanger provided in parallel with the evaporator, the evaporator and the heat recovery. A flow path control means for controlling the flow of refrigerant to the heat exchanger, a hot water storage tank, a hot water supply circuit having a hot water heat exchanger having a heat exchange relationship with the condenser, and a heat exchange relationship with the heat recovery heat exchanger. A bath circuit having a bath heat exchanger, a refrigerant inlet temperature detecting means in the evaporator, an outside air temperature detecting means, a refrigerant inlet temperature detecting means of the heat recovery heat exchanger, a bath temperature detecting means, and the flow A heat pump bath hot water system having an operation control means for controlling a path control means, the operation control means comprising: a refrigerant inlet temperature detection means in the evaporator; the outside air temperature detection means; and the heat recovery heat exchange. Of refrigerant inlet temperature And the flow path switching means based on a signal from the bath temperature detection means, the operation control means controls the flow path switching means, and is either an evaporator or a heat recovery exchanger, Alternatively, the heat pump bath hot water supply system is characterized in that the flow path is switched so that the refrigerant flows through the evaporator and the heat recovery exchanger at the same time.
[0010]
According to this embodiment, when the refrigerant flows to the evaporator and the heat recovery heat exchanger, the atmospheric heat collection of the evaporator is detected by the first heat collection detection means, and the heat recovery heat exchanger is detected. When the second heat collection detection means detects the remaining heat from the bathtub and collects both the evaporator and the heat recovery heat exchanger, it collects the remaining heat from the bathtub and the atmospheric heat at the same time. To do. In addition, when heat collection operation is performed when the bath remaining hot water temperature is high, such as immediately after completion of bathing at a low outdoor temperature in winter, high-temperature refrigerant flows in the heat recovery heat exchanger and the evaporator. May not. At that time, it is detected that the heat is not collected from the atmosphere, and the heat collecting heat exchanger alone performs the heat collecting operation without flowing the refrigerant to the evaporator. In addition, when the outdoor temperature is high, such as in summer, the remaining hot water temperature of the bathtub may decrease below the ambient temperature as the heat collection operation time elapses, and the refrigerant flowing through the heat recovery heat exchanger may become higher than the residual hot water temperature of the bathtub. is there. At that time, the heat recovery heat exchanger detects that the remaining hot water in the bathtub is not collected, and collects atmospheric heat in the evaporator without flowing the refrigerant to the heat recovery heat exchanger. Therefore, if the heat from the bath residual heat and the atmospheric heat can be collected at the same time, simultaneous heat collection is performed for high heat collection and high efficiency operation. If simultaneous heat collection is not possible, either the evaporator or the heat recovery heat exchanger is collected. Operation is performed by switching the refrigerant flow path so that the refrigerant flows through the heat exchanger that can be heated, thereby increasing the amount of heat collection and improving the reliability of the equipment.
[0011]
In addition to the configuration of claim 1 , the invention of claim 3 is provided with a bath pump in the bath circuit, and a flow rate control means for controlling the flow rate of the bath pump based on the signal of the first heat collection detection means. In the operation that collects atmospheric heat and residual hot water from the bath at the same time, if the hot air temperature cannot be collected because the residual hot water temperature is high, the flow rate of the bath pump is reduced to flow through the heat recovery heat exchanger and evaporator Reduce the refrigerant temperature so that atmospheric heat can be collected. Therefore, since the bathtub residual hot water heat recovery and the atmospheric heat are simultaneously collected, the evaporator and the heat recovery heat exchanger can be downsized.
[0012]
In addition to the structure of claim 1, the invention of claim 4 is provided with a blower in the vicinity of the evaporator, and has a blower control means for controlling the rotational speed of the blower based on the signal of the second heat collection detection means, In the simultaneous heat collection operation of the atmospheric heat and the remaining hot water from the bathtub, if the remaining hot water cannot be collected because the remaining hot water temperature is low, the fan speed is decreased and the heat recovery heat exchanger and the evaporator flow. Reduce the refrigerant temperature so that the remaining hot water from the bathtub can be collected. Accordingly, the heat remaining in the bathtub can be collected during the operation using atmospheric heat with a simple configuration such as controlling the rotational speed of the blower, and the evaporator can be downsized.
[0013]
According to a fifth aspect of the invention, in addition to the configuration of the first aspect , the refrigerant temperature detecting means for detecting the refrigerant inlet temperature of the evaporator, and the flow path control means are controlled by receiving a signal from the refrigerant temperature detecting means. It is equipped with a low-temperature operation control means, and detects that frosting has started to occur in the evaporator during the winter atmospheric heat operation, and also flows the refrigerant through the heat recovery heat exchanger. The temperature of the refrigerant flowing through the evaporator and the heat recovery heat exchanger is raised to melt the frost on the evaporator surface or slow the progress of frost formation. To increase.
[0014]
According to a sixth aspect of the invention, in addition to the configuration of the first aspect , the discharge temperature detecting means for detecting the refrigerant discharge temperature of the compressor, and the flow path control means are controlled by receiving a signal from the discharge temperature detecting means. It is provided with an operation control means, and detects that the refrigerant discharge temperature of the compressor has abnormally increased during the operation using atmospheric heat or the operation using residual hot water from the bathtub, and flows the refrigerant through the evaporator and the heat recovery heat exchanger, Since the compressor suction pressure is increased and the discharge pressure is decreased to reduce the compression ratio and the refrigerant discharge temperature is lowered, the durability of the compressor is improved.
[0015]
In addition to the structure of claim 1, the invention described in claim 7 has a configuration in which when the refrigerant is evaporated by the heat recovery heat exchanger alone or the evaporator alone, the evaporator and the bath heat are used for a predetermined time at the start of operation. In the recovery heat exchanger, an operation control means is provided for controlling the flow path control means so that the refrigerant does not flow, and when the operation is performed using the hot water from the bathtub, the flow path control means is closed for a predetermined time at the initial stage of operation. The refrigerant collected in the evaporator and heat recovery heat exchanger is recovered by the compressor and cycled with the specified amount of refrigerant during operation using the remaining hot water from the bath. Will improve.
[0016]
According to an eighth aspect of the present invention, in addition to the configuration of the first aspect , a refrigerant recovery temperature detecting means for detecting a refrigerant inlet temperature of a heat recovery heat exchanger, and a signal received from the refrigerant recovery temperature detection means in response to the bath. A pump control means is provided to control the pump to the maximum flow rate, and when the hot water storage operation is performed using the remaining hot water from the bathtub, the end of the recovery of the remaining hot water is detected and the maximum flow rate of the bath pump in the bath heat exchanger is detected. It is circulated in and the scale in the bath heat exchanger flows out. Therefore, since the clogging in the bath heat exchanger can be prevented, durability is improved.
[0017]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. In addition, in a prior art example and each Example, the same code | symbol is attached | subjected about what has the same structure and the same operation | movement, and description is partially abbreviate | omitted.
[0018]
(Example 1)
FIG. 1 is a configuration diagram of a heat pump bath hot water supply system according to Embodiment 1 of the present invention. In FIG. 1, the solid line arrow represents the refrigerant flow direction when using atmospheric heat or solar heat, and the broken line represents the refrigerant flow direction when using bath waste heat.
[0019]
Reference numeral 1 denotes a compressor, 2 denotes a condenser, 3 denotes first decompression means, and 4 denotes an evaporator, which collects atmospheric heat or solar heat. Reference numeral 5 denotes a second decompression means, and 6 denotes a heat recovery heat exchanger, which is provided in parallel with the first decompression means 3 and the evaporator 4. Reference numeral 7 denotes a flow path control means for controlling the refrigerant flow to the evaporator 4 and the heat recovery heat exchanger 6. 8 is a hot water storage tank, 9 is a hot water supply heat exchanger, and has a heat exchange relationship with the condenser 2. A hot water supply circuit 10 includes a hot water storage tank 8 and a hot water supply heat exchanger 9. 11 is a bathtub, 12 is a bath heat exchanger, and has a heat exchange relationship with the heat recovery heat exchanger 6. Reference numeral 13 denotes a bath circuit, which includes a bathtub 11 and a bath heat exchanger 12. Reference numeral 14 denotes first heat collection detection means, which detects heat collection in the evaporator 4 from the temperature difference between the refrigerant inlet temperature detection means 15 and the outside air temperature detection means 16 of the evaporator 4. Reference numeral 17 denotes second heat collection detection means for detecting heat collection in the heat recovery heat exchanger 6 from the temperature difference between the refrigerant inlet temperature detection means 18 and the bath temperature detection means 19 of the heat recovery heat exchanger 6. Reference numeral 20 denotes an operation control means, which controls the flow path control means 7 in response to signals from the first heat collection detection means 14 and the second heat collection detection means 17.
[0020]
The operation and action of the above configuration will be described.
[0021]
In the operation that collects bath waste heat and atmospheric heat at the same time, this section describes the operation when the bath residual hot water temperature is high, such as immediately after bathing at low outdoor temperature in winter. The refrigerant discharged from the compressor 1 flows into the condenser 2 and heats the water in the hot water storage tank 8 through the hot water supply heat exchanger 9. The condensed and liquefied refrigerant is divided into a refrigerant that flows into the evaporator 4 through the first pressure reducing means 3 and a refrigerant that flows into the heat recovery heat exchanger 6 through the second pressure reducing means 5. The refrigerant flowing into the evaporator 4 collects atmospheric heat or solar heat, and the refrigerant flowing into the heat recovery heat exchanger 6 collects the remaining hot water in the bathtub 11 via the bath heat exchanger 12. The first heat collection detection means 14 detects the heat collection in the evaporator 4 from the temperature difference between the evaporator temperature detection means 15 and the outside air temperature detection means 16. The second heat collection detection means 17 detects heat collection in the heat recovery heat exchanger 6 from the temperature difference between the heat recovery refrigerant temperature detection means 18 and the bath temperature detection means 19. At that time, when the temperature of the remaining hot water is high, such as immediately after bathing, the refrigerant flowing through the heat recovery heat exchanger 6 becomes high temperature, so the refrigerant flowing through the evaporator 4 flows at a temperature higher than the outside air temperature, and the first collection The heat detection means 14 detects that the evaporator 4 does not collect heat. The operation control means 20 receives the signal from the first heat collection detection means 14 and controls the flow path control means 7 so that the refrigerant does not flow to the evaporator 4. When the temperature of the remaining hot water in the bathtub decreases with the elapse of the heat collection operation time and the temperature of the refrigerant flowing through the heat recovery heat exchanger 6 decreases to a temperature at which the heat can be collected by the evaporator 4, the first heat collection detection means 14 controls the operation. A signal is sent to the means 20 to control the flow path control means 7 so that the refrigerant also flows to the evaporator 4. Then, high-efficiency operation is performed by simultaneously collecting the atmospheric heat and the hot water from the bathtub. When the heat collection operation is continued and the temperature of the remaining hot water in the bathtub further decreases and the refrigerant flowing through the heat recovery heat exchanger 6 becomes higher than the temperature of the remaining hot water in the bath, the second heat collection detection means 17 controls the operation. A signal is sent to the means 20, and atmospheric heat is collected by the evaporator 4 without flowing the refrigerant to the heat recovery heat exchanger 6. Therefore, if the heat from the bath residual heat and the atmospheric heat can be collected at the same time, simultaneous heat collection is performed for high heat collection and high efficiency operation. If simultaneous heat collection is not possible, either the evaporator or the heat recovery heat exchanger is collected. Operation is performed by switching the refrigerant flow path so that the refrigerant flows through the heat exchanger that can be heated, thereby increasing the amount of heat collection and improving the reliability of the equipment.
[0022]
If a check valve 21 is provided in the middle of the outlet of the evaporator 4 and the compressor 1 so that the refrigerant flowing out of the heat recovery heat exchanger 6 does not flow into the evaporator, the heat recovery heat exchanger 6 is operated independently. The durability of the compressor 1 at the time is further improved.
[0023]
If the compressor 1, the condenser 2, the evaporator 4, and the heat recovery heat exchanger 6 are housed in one unit so that connection between the units is eliminated, there is no leakage of the refrigerant, and the refrigerant is discharged at the time of relocation. It becomes an environmentally friendly device.
[0024]
(Example 2)
FIG. 2 is a configuration diagram of a heat pump bath hot water supply system according to Embodiment 2 of the present invention. In FIG. 2, reference numeral 22 denotes a bath pump, which is provided in the bath circuit 13. Reference numeral 23 denotes a flow rate control means for controlling the flow rate of the bath pump 21 based on the signal from the first heat collection detection means 14.
[0025]
The operation and action of the above configuration will be described.
[0026]
In the operation of collecting the atmospheric heat and the remaining hot water from the bathtub at the same time, the first heat collection detecting means 14 detects that the atmospheric heat cannot be collected because the remaining hot water temperature is high, and sends a signal to the flow control means 23. Then, the flow rate control means 23 performs control to reduce the flow rate of the bath pump 21, lowers the temperature of the refrigerant flowing through the heat recovery heat exchanger 6 and the evaporator 4, and collects atmospheric heat. Therefore, it is possible to extend the operation time for simultaneously collecting the hot water recovery from the bathtub and the atmospheric heat, and to reduce the size of the evaporator and the heat recovery heat exchanger.
[0027]
(Example 3)
FIG. 3 is a configuration diagram of a heat pump bath hot water supply system according to Embodiment 3 of the present invention. In FIG. 3, reference numeral 24 denotes a blower that forcibly sends atmospheric heat to the evaporator 4. Reference numeral 25 denotes a blower control unit that controls the rotation speed of the blower 24 based on a signal from the second heat collection detection unit 17.
[0028]
The operation and action of the above configuration will be described.
[0029]
In the operation of collecting the atmospheric heat and the bath residual hot water simultaneously, the second heat collection detecting means 17 detects that the hot water remaining in the bath cannot be collected because the residual hot water temperature is low, and the flow control means 23 is detected. Send a signal. And the air blower control means 25 lowers the rotation speed of the air blower 24, lowers the temperature of the refrigerant flowing through the heat recovery heat exchanger 6 and the evaporator 4, and makes it possible to collect the bath residual hot water heat. Accordingly, the heat remaining in the bathtub can be collected during the operation using atmospheric heat with a simple configuration such as controlling the rotational speed of the blower, and the evaporator can be downsized.
[0030]
(Example 4)
FIG. 4 is a configuration diagram of a heat pump bath hot water supply system according to Embodiment 4 of the present invention. In FIG. 4, reference numeral 26 denotes a refrigerant temperature detection unit that detects the refrigerant inlet temperature of the evaporator 4. Reference numeral 27 denotes a low-temperature operation control means, which controls the flow path control means 23 in response to a signal from the refrigerant temperature detection means 26.
[0031]
The operation and action of the above configuration will be described.
[0032]
The refrigerant temperature detection means 26 detects that frosting has started to occur in the evaporator 4 during the atmospheric heat utilization operation in winter, and sends a signal to the low temperature operation control means 27. The low-temperature operation control means 27 controls the flow path control means 23 so that the refrigerant flows through the heat recovery heat exchanger 6. Accordingly, the temperature of the refrigerant flowing through the evaporator 4 and the heat recovery heat exchanger 6 rises and the frost on the evaporator surface melts or the progress of frost formation slows down, so the amount of collected heat of the atmospheric heat and the residual hot water in the bathtub increases. As a result, the amount of stored heat increases.
[0033]
(Example 5)
FIG. 5 is a configuration diagram of a heat pump bath hot water supply system according to Embodiment 5 of the present invention. In FIG. 5, reference numeral 28 denotes a discharge temperature detection means that detects the refrigerant discharge temperature of the compressor 1. Reference numeral 29 denotes an operation control means that controls the flow path control means 23 in response to a signal from the discharge temperature detection means 28.
[0034]
The operation and action of the above configuration will be described. During the operation using the atmospheric heat or the operation using the remaining hot water from the bathtub, the discharge temperature detection means 28 detects that the refrigerant discharge temperature of the compressor 1 has risen abnormally, and the operation control means 29 detects the evaporator 4 and the heat recovery heat. A refrigerant is passed through the exchanger 6 to increase the suction pressure of the compressor 1 and decrease the discharge pressure to reduce the compression ratio. Therefore, the refrigerant discharge temperature is lowered and the durability of the compressor is improved.
[0035]
(Example 6)
FIG. 6 is a configuration diagram of a heat pump bath water heating system according to a sixth embodiment of the present invention. In FIG. 6, reference numeral 30 denotes an operation command means, which issues an operation signal for evaporating the refrigerant by the heat recovery heat exchanger 6 alone or the evaporator 4 alone. 31 is an operation control means, which receives the signal from the operation command means 30 and controls the flow path control means 23 so that the refrigerant does not flow in the evaporator 4 and the heat recovery heat exchanger 6 for a predetermined time.
[0036]
The operation and action of the above configuration will be described.
[0037]
In the operation using the remaining hot water from the bathtub, the compressor 1 is operated at the start of operation, and the flow path control means 23 is set for a predetermined time so that the refrigerant does not flow from the condenser 2 to the evaporator 4 and the heat recovery heat exchanger 6. Close. Then, the refrigerant accumulated in the evaporator 4 and the heat recovery heat exchanger 6 is recovered by the compressor 1 and flows out to the condenser 2. Then, after a predetermined time, the refrigerant is circulated through the compressor 1, the condenser 2 that heats the water in the hot water storage tank, and the heat recovery heat exchanger 6 that collects the hot water in the bathtub, by switching the flow path control means 23. To do. Next, in the operation of collecting the atmospheric heat, the flow path control means after a predetermined time when the refrigerant accumulated in the evaporator 4 and the heat recovery heat exchanger 6 is recovered by the compressor 1 and flows out to the condenser 2. The refrigerant is circulated through the compressor 1, the condenser 2 that heats the water in the hot water storage tank 8, and the evaporator 4 that collects atmospheric heat. Therefore, since the cycle circulation is performed with the specified refrigerant filling amount during the operation using the remaining bath water heat and the operation using the atmospheric heat, the performance and the reliability of the device are improved.
[0038]
(Example 7)
FIG. 7 is a block diagram of a heat pump bath water heating system according to a seventh embodiment of the present invention. In FIG. 7, reference numeral 32 denotes a refrigerant recovery temperature detection means for detecting the refrigerant inlet temperature of the heat recovery heat exchanger 6. Reference numeral 33 denotes pump control means for receiving the signal from the refrigerant recovery temperature detection means 32 and controlling the bath pump 22 to the maximum flow rate.
[0039]
The operation and action of the above configuration will be described. When the hot water storage operation is performed using the remaining hot water of the bathtub, the refrigerant recovery temperature detection means 32 detects the end of the recovery of the remaining hot water and sends a signal to the pump control means 33, and the pump control means 33 is sent to the bath pump 22. Is circulated at the maximum flow rate. And the inside of the bath heat exchanger 12 is made to flow at the maximum flow velocity, and the scale in the bath heat exchanger 12 is discharged. Therefore, clogging in the bath heat exchanger can be prevented, and durability is improved. Instead of the refrigerant recovery temperature detection means 32, the bath temperature detection means 34 provided in the bath circuit detects the bath remaining hot water temperature, sends a signal to the pump control means 33, and controls the bath pump 22 to the maximum flow rate. Produces the same effect.
[0040]
【The invention's effect】
As is apparent from the above description, the heat pump bath system of the present invention has the following effects.
[0041]
If the heat from the bath residual heat and atmospheric heat can be collected at the same time, high heat collection and high efficiency operation can be performed by collecting heat at the same time. If simultaneous heat collection is not possible, either the evaporator or the heat recovery heat exchanger can be collected. Operation is performed by switching the refrigerant flow path so that the refrigerant flows through the heat exchanger, thereby increasing the amount of heat collection and improving the reliability of the equipment.
[Brief description of the drawings]
FIG. 1 is a block diagram of a heat pump type hot water supply system according to a first embodiment of the present invention. FIG. 2 is a block diagram of a heat pump type hot water supply system according to a second embodiment of the present invention. Fig. 4 is a block diagram of a heat pump type bath water heating system according to a fourth embodiment of the present invention. Fig. 5 is a block diagram of a heat pump type bath water heating system according to a fifth embodiment of the present invention. FIG. 7 is a block diagram of a heat pump bath water heating system according to a sixth embodiment of the present invention. FIG. 7 is a block diagram of a heat pump bath water heating system according to a seventh embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 1st pressure reduction means 4 Evaporator 5 2nd pressure reduction means 6 Heat recovery heat exchanger 7 Flow path control means 8 Hot water storage tank 9 Hot water supply heat exchanger 10 Hot water supply circuit 11 Bath 12 Bath heat exchanger 13 Bath circuit 14 First heat collection detection means 15 Evaporator temperature detection means 16 Outside air temperature detection means 17 Second heat collection detection means 18 Heat recovery refrigerant temperature detection means 19 Bath temperature detection means 20 Operation control means 21 Check valve 22 Bath pump 23 Flow rate control means 24 Blower 25 Blower control means 26 Refrigerant temperature detection means 27 Low temperature operation control means 28 Discharge temperature detection means 29 Operation control means 30 Operation command means 31 Operation control means 32 Refrigerant recovery temperature detection means 33 Pump control means 34 Bath temperature detection means

Claims

A compressor, a condenser, an evaporator for collecting atmospheric heat or solar heat, a heat recovery heat exchanger provided in parallel with the evaporator, and a flow of the refrigerant to the evaporator and the heat recovery heat exchanger A flow path control means, a hot water storage tank, a hot water supply circuit having a hot water heat exchanger having a heat exchange relationship with the condenser, a bath circuit having a bath heat exchanger having a heat exchange relationship with the heat recovery heat exchanger, Operation for controlling the first heat collection detection means for detecting heat collection in the evaporator, the second heat collection detection means for detecting heat collection in the heat recovery heat exchanger, and the flow path control means A heat pump bath hot water system having a control means, wherein the operation control means receives the signals of the first heat collection detection means and the second heat collection detection means to control the flow path switching means. the operation control unit may control the flow selecting means Te, the evaporator and any of the heat recovery exchanger or evaporator and heat pump bath hot-water supply system, characterized in that for switching the flow path to flow simultaneously the refrigerant to the heat recovery exchanger.

A compressor, a condenser, an evaporator for collecting atmospheric heat or solar heat, a heat recovery heat exchanger provided in parallel with the evaporator, and a flow of the refrigerant to the evaporator and the heat recovery heat exchanger A flow path control means, a hot water storage tank, a hot water supply circuit having a hot water heat exchanger having a heat exchange relationship with the condenser, a bath circuit having a bath heat exchanger having a heat exchange relationship with the heat recovery heat exchanger, Refrigerant inlet temperature detection means in the evaporator, outside air temperature detection means, refrigerant inlet temperature detection means of the heat recovery heat exchanger, bath temperature detection means, and operation control means for controlling the flow path control means. A heat pump type hot water supply system, wherein the operation control means includes: a refrigerant inlet temperature detecting means in the evaporator; the outside air temperature detecting means; a refrigerant inlet temperature detecting means of the heat recovery heat exchanger; Bath temperature detection hand By controlling the flow path switching unit based on a signal from the operation control means controls the passage switching means, either the evaporator and the heat recovery exchanger, or evaporator and the heat recovery exchanger The heat pump bath water heating system is characterized in that the flow path is switched so that the refrigerant flows simultaneously.

The heat pump type hot water supply system according to claim 1, further comprising a flow rate control means for providing a bath pump in the bath circuit and controlling the flow rate of the bath pump based on a signal from the first heat collecting detection means.

The heat pump type hot water supply system according to claim 1, further comprising a blower control means for providing a blower in the vicinity of the evaporator and controlling a rotation speed of the blower based on a signal from the second heat collection detection means.

The heat pump bath hot water supply system according to claim 1, further comprising: a refrigerant temperature detecting means for detecting a refrigerant inlet temperature of the evaporator; and a low temperature operation control means for receiving a signal from the refrigerant temperature detecting means to control the flow path control means.

The heat pump bath hot water supply system according to claim 1, further comprising: a discharge temperature detection unit that detects a refrigerant discharge temperature of the compressor; and an operation control unit that receives the signal from the discharge temperature detection unit and controls the flow path control unit.

When the refrigerant is evaporated by the heat recovery heat exchanger alone or the evaporator alone, the flow path control means is controlled so that the refrigerant does not flow in the evaporator and the bath heat recovery heat exchanger for a predetermined time at the start of operation. The heat pump bath water heating system according to claim 1, further comprising an operation control means.

The heat pump type according to claim 1, further comprising: a refrigerant recovery temperature detection means for detecting a refrigerant inlet temperature of the heat recovery heat exchanger; and a pump control means for receiving a signal from the refrigerant recovery temperature detection means to control the bath pump to a maximum flow rate. Bath hot water system.