【書類名】 明細書
【発明の名称】 給湯システム
【特許請求の範囲】
【請求項１】 浴槽あるいは貯水タンクと連通した熱回収熱交換器と、この熱回収熱交換器と熱交換関係を有し給水管からの給水が流れる熱交換器と、この熱交換器と出湯する端末との間の給水管途中に設けた加熱手段とを有する給湯システム。
【請求項２】 加熱手段の出口の湯温を検出する温度検出手段と、この温度検出手段の検出温度が所定温度となるように加熱手段の出力を制御する制御手段を備えた請求項１記載の給湯システム。
【請求項３】 加熱手段は圧縮機と蒸発器と減圧手段とを備えたヒートポンプ回路を有する請求項１または２記載の給湯システム。
【請求項４】 熱回収熱交換器および熱交換器と熱交換関係を有する蓄熱手段を備えた請求項１〜３いずれか１項に記載の給湯システム。
【請求項５】 蒸発器と並列に設けた大気熱あるいは太陽熱を集熱する自然熱利用熱交換器を備えた請求項３または４記載の給湯システム。
【請求項６】 給水管の水の流れを検出する流量検出手段と、この流量検出手段の信号により圧縮機を運転開始する制御手段を備えた請求項３〜５いずれか１項に記載の給湯システム。
【請求項７】 加熱手段と並列に設けた開閉弁を備えたバイパス管と、給水管の水の流れを検出する流量検出手段と、前記加熱手段の流体出口と前記バイパス管の合流した湯温を検出する温度検出手段と、前記流量検出手段の信号を受けて前記温度検出手段の検出温度が所定温度より高温の場合には前記開閉弁を開放する制御手段を備えた請求項１〜５いずれか１項に記載の給湯システム。
【請求項８】 熱回収熱交換器、熱交換器、加熱手段、ヒートポンプ回路及び風呂熱交換器を１つのユニットに収納してなる請求項３〜６いずれか１項に記載の給湯システム。
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】
本発明は入浴後の浴槽残湯熱等を利用する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４−１０６３７０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８は従来の浴槽残湯熱を利用する風呂給湯システムの構成図である。図８において、貯湯タンク３０の下部室３０ｂの水を給湯ポンプ３１の運転により熱交換器３２に流して浴槽１の残湯水と熱交換して再び貯湯タンク３０の下部室３０ｂへ戻す。そして、圧縮機３３からの凝縮熱を利用して凝縮器３４で放熱し、貯湯タンク３０の上部室３０ａおよび下部室３０ｂの水を加熱し、貯湯するシステムである。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来の給湯システムでは、貯湯タンク３０内の下部室３０ｂの水温は浴槽１の残湯と熱交換して加熱されるため時間経過とともに上昇し、逆に浴槽の残湯温度は熱を奪われるため低下する。よって、浴槽１の残湯熱を給水温度まで熱回収できない。また、浴槽の残湯熱を回収して貯湯タンクに貯湯して、この湯を給湯に利用するため、シャワー、キッチン、洗面などにすぐに利用できない。また、残湯熱を回収して貯湯する貯湯タンクが必要となり設置スペース上の課題がある。
【０００４】
本発明は上記課題を解決するものであり、浴槽の残湯熱を給水温度まで回収するとともに、入浴終了直後から浴槽の残り湯を回収しながら給湯する省エネルギー化と、貯湯タンクレス化して機器の小型化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、浴槽あるいは貯水タンクと連通した熱回収熱交換器と、この熱回収熱交換器と熱交換関係を有し給水管からの給水が流れる熱交換器と、この熱交換器と出湯する端末との間の給水管途中に設けた加熱手段とを有する給湯システム
とする。
【０００６】
以上の構成により、浴槽入浴後にキッチン、洗面、シャワーなどに湯を使う場合において、給水管から給水された水を熱交換器および熱回収熱交換器を介して浴槽の残湯熱と熱交換させ、加熱する。そして、加熱された水を加熱手段の出口で所定温度となるように加熱出力を制御して加熱して出湯利用する。よって、浴槽の残湯と熱交換する流体は絶えず給水管を流れる給水であるため、浴槽の残湯熱を給水温度まで回収することができる。
【０００７】
また、浴槽の残り湯を回収しながら加熱手段のプレヒートに利用するため、加熱手段の加熱熱量が少なくなり省エネルギーとなる。また、加熱手段の加熱能力も小能力化できるため小型化が達成できるとともに貯湯タンクレス化が達成できるため省スペース化が実現できる。さらに、運転とともに浴槽の残湯温度が低下して熱交換器での熱交換量が減少しても加熱手段の出力を制御するため、出湯温度および給湯熱量は安定する。
【０００８】
【発明の実施の形態】
本発明の請求項１に記載の発明は、浴槽あるいは貯水タンクと連通した熱回収熱交換器と、この熱回収熱交換器と熱交換関係を有し給水管からの給水が流れる熱交換器と、この熱交換器と出湯する端末との間の給水管途中に設けた加熱手段とを有する給湯システムとし、浴槽入浴後にキッチン、洗面、シャワーなどに湯を使う場合において、給水管から給水された水を熱交換器および熱回収熱交換器を介して浴槽の残湯熱と熱交換させ、加熱する。よって、浴槽の残湯と熱交換する流体は絶えず給水管を流れる給水であるため、浴槽の残湯熱を給水温度まで回収することができる。また、浴槽の残り湯を回収しながら加熱手段のプレヒートに利用するため、加熱手段の加熱熱量が少なくなり省エネルギーとなる。また、加熱手段の加熱能力も小能力化できるため小型化が達成できるとともに貯湯タンクレス化が達成できるため省スペース化が実現できる。そして、請求項２に記載の発明は、加熱された水を加熱手段出口で所定温度となるように加熱出力を制御して加熱して出湯利用するので、運転とともに浴槽の残湯温度が低下して熱交換器での熱交換量が減少しても加熱手段の出力を制御するため、出湯温度および給湯熱量は安定する。
【０００９】
また、請求項３に記載の発明は、加熱手段は圧縮機と蒸発器と減圧手段とを備えたヒートポンプ回路を有する請求項１または２記載の給湯システムとする。従って、浴槽の残り湯温を給水温度よりも低温となるまで集熱できるため、一層の省エネルギー化が達成できる。
【００１０】
また、請求項４に記載の発明は、熱交換器および熱回収熱交換器と熱交換関係を有する蓄熱手段を備え、ヒートポンプで集熱した浴槽残湯熱を熱回収熱交換器を介して蓄熱手段に蓄熱し、給湯時に蓄熱手段を介して給水される水の加熱に利用する。従って、給湯利用されない場合においても、入浴直後の高温の浴槽残湯熱を集熱するため高効率で蓄熱運転できる。また、給湯時に蓄熱手段から大能力の熱量を引き出すことができる。そして、加熱手段から流出する湯温の立ち上げも速くなるため、即湯性が向上する。
【００１１】
また、請求項５に記載の発明は、蒸発器と並列に設けた大気熱あるいは太陽熱を集熱する自然熱利用熱交換器を備え、浴槽に水がない場合、あるいは浴槽残湯熱を集熱して浴槽水が低温になった場合において、大気熱あるいは太陽熱を集熱して蓄熱する。従って、常に蓄熱手段に蓄熱できるため、経済性および利便性が向上する。
【００１２】
また、請求項６に記載の発明は、給水管の水の流れを検出する流量検出手段と、流量検出手段の信号を受けて圧縮機を運転開始する制御をおこなう制御手段を備え、給湯時に給水が流れることを流量検出手段が検出して圧縮機を運転開始する。
【００１３】
従って、蓄熱手段を有する場合には蓄熱量が補充されて熱交換器での熱交換量が増加し、あるいは蓄熱手段を具備しない場合には熱交換器での熱交換量が増加して給湯能力が向上するとともに加熱手段の立ち上げ湯温も速くなる。
【００１４】
また、請求項７に記載の発明は、加熱手段と並列に設けた開閉弁を備えたバイパス管と、給水管の水の流れを検出する流量検出手段と、加熱手段の流体出口とバイパス管の合流した湯温を検出する温度検出手段と、流量検出手段の信号を受けて温度検出手段の検出温度が所定温度より高温の場合には開閉弁を開放する制御をおこなう制御手段を備え、出湯時において、給水管の水の流れを検出して、加熱手段出口の湯温が所定温度より高温の場合には加熱手段をバイパスして出湯する。従って、加熱手段を流れる時の放熱も少なくなる。
【００１５】
また、請求項８に記載の発明は、熱回収熱交換器、熱交換器、加熱手段、ヒートポンプ回路、風呂熱交換器を１つのユニットに収納した構成からなり、大気熱利用のように通風路を確保することもないため、集合住宅のパイプシャフト内の設置、あるいは屋内設置が可能となるため、設置の自由度が向上する。
【００１６】
【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。
【００１７】
（実施例１）
図１は本発明の実施例１の風呂熱利用給湯システムの構成図である。図１において、実線矢印は給水の流れを表し、破線は浴槽残湯水の流れを表す。
【００１８】
１は浴槽あるいは家庭内の排水や雨水を貯水する貯水タンク、２は熱回収熱交換器であり浴槽１と連通する。３は風呂ポンプであり浴槽１の残湯水を熱回収熱交換器２へ搬送する。４は熱交換器であり熱回収熱交換器２と熱交換関係を有して給水管５からの給水が流れる。６は加熱手段であり水熱交換器７と燃焼器８を備え、熱交換器４と出湯する端末カラン９の給水管５の途中に設けられて、燃焼器８の燃焼熱によって水熱交換器７を流れる給水管５からの給水を加熱する。１０は温度検出手段であり加熱手段６出口の湯温を検出する。１１は制御手段であり温度検出手段１０の検出温度が所定温度となるように加熱手段６の出力を制御する。
【００１９】
以上の構成において、その動作、作用について説明する。浴槽入浴後にキッチン、洗面、シャワーなど湯を使う場合において、端末カラン９が開放されると給水管５から給水された水を熱交換器４および熱回収熱交換器２を介して浴槽１の残湯熱と熱交換させ、加熱する。そして、加熱された水が加熱手段６に流入して、水熱交換器７を流れる際に燃焼器８の燃焼熱によってにさらに高温加熱される。そして、加熱手段６出口で所定温度となるように加熱手段６の出力を制御して端末カラン９から出湯する。よって、浴槽１の残湯と熱交換する流体は絶えず給水管５を流れる給水であるため、浴槽１の残湯熱を給水温度まで回収することができる。
【００２０】
また、浴槽１の残り湯を回収しながら加熱手段６のプレヒートに利用するため、加熱手段６の加熱熱量が少なくなり省エネルギーとなる。また、加熱手段６の加熱能力も小能力化できるため小型化が達成できるとともに貯湯タンクレス化が達成できるため省スペース化が実現できる。さらに、運転とともに浴槽の残湯温度が低下して熱交換器での熱交換量が減少しても加熱手段の出力を制御するため、出湯温度および給湯熱量は安定する。
【００２１】
また、浴槽１の代わりに家庭から排水される中温水の湯を貯水する貯水タンクを利用した場合は同様の効果があるとともに貯水タンクに湯が貯湯されるたびに加熱手段のプレヒートに利用できる。また、加熱手段６として燃焼器８の燃焼熱の代わりに電気ヒータを用いても同様の効果がある。
【００２２】
（実施例２）
図２は本発明の実施例２の風呂熱利用給湯システムの構成図である。図２において、ヒートポンプ回路の冷媒流れを一点鎖線で表す。１２は熱回収熱交換器であり、熱交換器４と熱交換関係を有する。１３は圧縮機、１４は蒸発器、１５は減圧手段である。１６はヒートポンプ回路であり、熱回収熱交換器１２、圧縮機１３、蒸発器１４、減圧手段１５からなる。１７は風呂熱交換器であり、蒸発器１４と熱交換関係を有する。１８は浴槽であり、風呂熱交換器１７と接続されている。
【００２３】
以上の構成において、その動作、作用について説明する。
【００２４】
浴槽１８の残湯熱を風呂熱交換器１７を介してヒートポンプ１６の蒸発器１４で集熱する。そして、集熱した熱を熱回収熱交換器１２で放熱して熱交換器４を流れる給水を加熱する。そして、さらに加熱手段６で所定温度まで加熱して出湯し、利用する。従って、浴槽の残り湯温を給水温度よりも低温となるまで集熱できるため、一層の省エネルギー化が達成できる。また、浴槽１８の代わりに家庭から排水される中温水の湯を貯水する貯水タンクを利用した場合は同様の効果があるとともに貯水タンクに湯が貯湯されるたびに加熱手段のプレヒートに利用できる。
【００２５】
（実施例３）
図３は本発明の実施例３の風呂熱利用給湯システムの構成図である。図３において、１９は蓄熱手段であり、熱交換器４および熱回収熱交換器１２と熱交換関係を有する。
【００２６】
以上の構成において、その動作、作用について説明する。
【００２７】
ヒートポンプ１６で集熱した浴槽残湯熱を熱回収熱交換器１２を介して蓄熱手段１９に蓄熱し、給湯時に蓄熱手段１９を介して給水される水の加熱に利用する。
【００２８】
従って、給湯利用されない場合においても、入浴直後の高温の浴槽残湯熱を集熱するため高効率で蓄熱運転できる。また、給湯時に蓄熱手段１９から大能力の熱量を引き出すことができる。そして、加熱手段６から流出する湯温の立ち上げも速くなるため、即湯性が向上する。
【００２９】
（実施例４）
図４は本発明の実施例４の風呂熱利用給湯システムの構成図である。図４において、２０は自然熱利用熱交換器であり、蒸発器と並列に設けて、大気熱あるいは太陽熱を集熱する。
【００３０】
以上の構成において、その動作、作用について説明する。浴槽に水がない場合、あるいは浴槽残湯熱を集熱して浴槽水が低温になった場合において、ヒートポンプ回路は自然熱利用熱交換器２０を蒸発器として利用する。そして、ここで大気熱あるいは太陽熱を集熱して蓄熱手段１９に蓄熱する。従って、蓄熱量が増加するため、経済性および利便性が向上する。
【００３１】
（実施例５）
図５は本発明の実施例５の風呂熱利用給湯システムの構成図である。図５において、２１は流量検出手段であり、給水管５の水の流れを検出する。２２は制御手段であり、流量検出手段２１の信号を受けて圧縮機を運転開始する制御をおこなう。
【００３２】
以上の構成において、その動作、作用について説明する。
【００３３】
給湯時に給水が流れたことを流量検出手段２１が検出して、制御手段２２へ信号を送り圧縮機１３の運転を開始して、熱回収熱交換器１２で放熱する。従って、蓄熱手段１９を有する場合には蓄熱量が補充されて熱交換器４での熱交換量が増加し、あるいは蓄熱手段１９を具備しない場合には熱交換器４での熱交換量が増加して給湯能力が向上するとともに加熱手段６の立ち上げ湯温も速くなる。
【００３４】
（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。
【００３５】
図６において、２３はバイパス管であり、加熱手段６と並列に設けて、開閉弁２４を備える。２５は流量検出手段であり、給水管５の水の流れを検出する。２６は温度検出手段であり、加熱手段６の流体出口とバイパス管２３の合流した湯温を検出する。２７は制御手段であり、流量検出手段２５の信号を受けて温度検出手段２６の検出温度が所定温度より高温の場合には開閉弁２４を開放する制御をおこなう。
【００３６】
以上の構成において、その動作、作用について説明する。出湯時において、給水管５の水の流れを流量検出手段２５で検出して、加熱手段６出口の湯温が所定温度より高温の場合には加熱手段６をバイパスして出湯する。従って、加熱手段を流れる時の放熱も少なくなる。また、流通抵抗も減少するため端末カランからの出水量が増加する。
なる。また、流通抵抗も減少するため端末カランからの出水量が増加する。
【００３７】
（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。
【００３８】
図７において、２８は給湯ユニットであり、熱回収熱交換器２，１２、熱交換器４、加熱手段６、ヒートポンプ回路１６、風呂熱交換器１７を１つのユニットに収納する。
【００３９】
以上の構成において、その動作、作用について説明する。大気熱利用のように通風路を確保することもないため、集合住宅のパイプシャフト内の設置、あるいは屋内設置が可能となるため、設置の自由度が向上する。
【００４０】
【発明の効果】
以上の説明からも明らかのように、本発明によれば、浴槽の残湯熱を給水温度まで回収することができる。また、浴槽の残り湯を回収しながら加熱手段のプレヒートに利用して省エネルギー化と加熱手段の小型化、貯湯タンクレス化が実現できる。また、出湯温度および給湯熱量の安定化をはかることができる。
【図面の簡単な説明】
【図１】
本発明の実施例１の風呂熱利用給湯システムの構成図
【図２】
本発明の実施例２の風呂熱利用給湯システムの構成図
【図３】
本発明の実施例３の風呂熱利用給湯システムの構成図
【図４】
本発明の実施例４の風呂熱利用給湯システムの構成図
【図５】
本発明の実施例５の風呂熱利用給湯システムの構成図
【図６】
本発明の実施例６の風呂熱利用給湯システムの構成図
【図７】
本発明の実施例７の風呂熱利用給湯システムの構成図
【図８】
従来の風呂熱利用給湯システムの構成図
【符号の説明】
１ 浴槽
２ 熱回収熱交換器
３ 風呂ポンプ
４ 熱交換器
５ 給水管
６ 加熱手段
７ 水熱交換器
８ 燃焼器
９ 端末カラン
１０ 温度検出手段
１１ 制御手段
１２ 風呂熱回収熱交換器
１３ 圧縮機
１４ 蒸発器
１５ 減圧手段
１６ ヒートポンプ回路
１７ 風呂熱交換器
１８ 浴槽
１９ 蓄熱手段
２０ 自然熱利用熱交換器
２１ 流量検出手段
２２ 制御手段
２３ バイパス管
２４ 開閉弁
２５ 流量検出手段
２６ 温度検出手段
２７ 制御手段
２８ 給湯ユニット
[Document name] Statement
[Title of Invention] Hot water supply system
[Claims]
[Claim 1] Is there a bathtub?Is savingA heat recovery heat exchanger that communicates with a water tank, a heat exchanger that has a heat exchange relationship with this heat recovery heat exchanger and flows water from a water supply pipe, and hot water is discharged from this heat exchanger.With the terminalWith the heating means provided in the middle of the water supply pipe betweenHot water supply system with.
2. The hot water supply system according to claim 1, further comprising a temperature detecting means for detecting the hot water temperature at the outlet of the heating means and a control means for controlling the output of the heating means so that the detected temperature of the temperature detecting means becomes a predetermined temperature...
3. The hot water supply system according to claim 1 or 2, wherein the heating means includes a heat pump circuit including a compressor, an evaporator, and a decompression means.
Claim4A claim comprising a heat recovery heat exchanger and a heat storage means having a heat exchange relationship with the heat exchanger.In any one of 1-3DescribedHot water supply system..
Claim5The hot water supply system according to claim 3 or 4, further comprising a heat exchanger using natural heat for collecting atmospheric heat or solar heat provided in parallel with an evaporator.
Claim6The claim includes a flow rate detecting means for detecting the flow of water in the water supply pipe, and a control means for starting the operation of the compressor by the signal of the flow rate detecting means.In any one of 3 to 5DescribedHot water supply system..
Claim7A bypass pipe provided with an on-off valve provided in parallel with the heating means, a flow rate detecting means for detecting the flow of water in the water supply pipe, and a temperature for detecting the temperature at which the fluid outlet of the heating means and the bypass pipe merge. The invention according to any one of claims 1 to 5, further comprising a detecting means and a control means for opening the on-off valve when the detection temperature of the temperature detecting means is higher than a predetermined temperature in response to the signal of the flow rate detecting means. DescribedHot water supply system..
Claim8A claim in which a heat recovery heat exchanger, a heat exchanger, a heating means, a heat pump circuit, and a bath heat exchanger are housed in one unit.3-6Described in any one itemHot water supply system..
Description: TECHNICAL FIELD [Detailed description of the invention]
[0001]
[Technical field to which the invention belongs]
The present invention is the heat of the residual hot water in the bathtub after bathing.Hot water supply using etc.It's about the system.
0002.
[Conventional technology]
Conventionally, there is a heat pump of this type as shown in Japanese Patent Application Laid-Open No. 4-106370. Hereinafter, the conventional technique will be described with reference to the drawings. FIG. 8 is a configuration diagram of a conventional bath water supply system that utilizes the residual heat of the bathtub. In FIG. 8, the water in the lower chamber 30b of the hot water storage tank 30 is flowed to the heat exchanger 32 by the operation of the hot water supply pump 31, heat is exchanged with the residual hot water in the bathtub 1, and the water is returned to the lower chamber 30b of the hot water storage tank 30 again. Then, the heat of condensation from the compressor 33 is used to dissipate heat in the condenser 34, and the water in the upper chamber 30a and the lower chamber 30b of the hot water storage tank 30 is heated and stored.
0003
[Problems to be Solved by the Invention]
However, in the conventional hot water supply system, the water temperature of the lower chamber 30b in the hot water storage tank 30 is heated by exchanging heat with the remaining hot water of the bathtub 1, so that the temperature rises with the passage of time, and conversely, the residual hot water temperature of the bathtub takes heat away. It decreases because it is damaged. Therefore, the residual hot water heat of the bathtub 1 cannot be recovered to the water supply temperature. In addition, the heat remaining in the bathtub is collected and stored in a hot water storage tank, and this hot water is used for hot water supply, so it cannot be used immediately for showers, kitchens, washbasins, etc. In addition, a hot water storage tank that recovers the residual hot water heat and stores the hot water is required, which poses a problem in terms of installation space.
0004
The present invention solves the above problems, and it saves energy by recovering the residual hot water of the bathtub to the water supply temperature and supplying hot water while collecting the remaining hot water of the bathtub immediately after the bathing, and makes the hot water storage tankless device. The main purpose is to reduce the size.
0005
[Means for solving problems]
In order to solve the above problems, the present invention provides a bathtub or a bathtub.Is savingA heat recovery heat exchanger that communicates with a water tank, a heat exchanger that has a heat exchange relationship with this heat recovery heat exchanger and flows water from a water supply pipe, and hot water is discharged from this heat exchanger.With the terminalWith the heating means provided in the middle of the water supply pipe betweenHot water supply system with
To..
0006
With the above configuration, when hot water is used for the kitchen, washbasin, shower, etc. after bathing in the bathtub, the water supplied from the water supply pipe is exchanged with the residual hot water heat of the bathtub via the heat exchanger and the heat recovery heat exchanger. , Heat. Then, the heated water is heated by controlling the heating output so as to reach a predetermined temperature at the outlet of the heating means, and the hot water is used. Therefore, since the fluid that exchanges heat with the residual hot water of the bathtub is the water supply that constantly flows through the water supply pipe, the residual hot water heat of the bathtub can be recovered to the water supply temperature.
0007
Further, since the remaining hot water in the bathtub is collected and used for preheating of the heating means, the amount of heat generated by the heating means is reduced, which saves energy. In addition, since the heating capacity of the heating means can be reduced, miniaturization can be achieved and the hot water storage tankless can be achieved, so that space saving can be realized. Further, even if the residual hot water temperature of the bathtub decreases with the operation and the heat exchange amount in the heat exchanger decreases, the output of the heating means is controlled, so that the hot water discharge temperature and the hot water supply heat amount are stable.
0008
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention is a bathtub or a bathtub.Is savingA heat recovery heat exchanger that communicates with a water tank, a heat exchanger that has a heat exchange relationship with this heat recovery heat exchanger and flows water from a water supply pipe, and hot water is discharged from this heat exchanger.With the terminalWith the heating means provided in the middle of the water supply pipe betweenAs a hot water supply system withWhen hot water is used in the kitchen, washbasin, shower, etc. after bathing in the bathtub, the water supplied from the water supply pipe is heated by exchanging heat with the residual hot water heat of the bathtub via a heat exchanger and a heat recovery heat exchanger. Therefore, since the fluid that exchanges heat with the residual hot water of the bathtub is the water supply that constantly flows through the water supply pipe, the residual hot water heat of the bathtub can be recovered to the water supply temperature. Further, since the remaining hot water in the bathtub is collected and used for preheating of the heating means, the amount of heat generated by the heating means is reduced, which saves energy. In addition, since the heating capacity of the heating means can be reduced, miniaturization can be achieved and the hot water storage tankless can be achieved, so that space saving can be realized.Then, in the invention according to claim 2, the heated water is heated by controlling the heating output so as to reach a predetermined temperature at the outlet of the heating means, and the hot water is used.Even if the residual hot water temperature of the bathtub decreases with operation and the heat exchange amount in the heat exchanger decreases, the output of the heating means is controlled, so that the hot water discharge temperature and the hot water supply heat amount are stable.
0009
Also, claims3The invention described inThe hot water supply system according to claim 1 or 2, wherein the heating means has a heat pump circuit including a compressor, an evaporator, and a decompression means.Therefore, heat can be collected until the temperature of the remaining hot water in the bathtub becomes lower than the water supply temperature, so that further energy saving can be achieved.
0010
Also, claims4The invention described in the present invention comprises a heat storage means having a heat exchange relationship with a heat exchanger and a heat recovery heat exchanger, and stores the residual hot water in the bathtub collected by the heat pump in the heat storage means via the heat recovery heat exchanger. It is used to heat the water supplied via the heat storage means during hot water supply. Therefore, even when the hot water supply is not used, the heat of the remaining hot water in the bathtub immediately after bathing is collected, so that the heat storage operation can be performed with high efficiency. In addition, a large amount of heat can be extracted from the heat storage means at the time of hot water supply. Then, the temperature of the hot water flowing out from the heating means rises faster, so that the immediate hot water property is improved.
0011
Also, claims5The invention described in the present invention includes a heat exchanger using natural heat that collects atmospheric heat or solar heat provided in parallel with an evaporator, and when there is no water in the bathtub, or when the residual hot water in the bathtub is collected, the temperature of the bathtub water is low. When it becomes, it collects atmospheric heat or solar heat and stores it. Therefore, heat can always be stored in the heat storage means, which improves economic efficiency and convenience.
0012
Also, claims6The invention described in the present invention comprises a flow rate detecting means for detecting the flow of water in a water supply pipe and a control means for controlling the start of operation of the compressor in response to a signal from the flow rate detecting means. The detection means detects and starts the operation of the compressor.
0013
Therefore, if the heat storage means is provided, the heat storage amount is replenished and the heat exchange amount in the heat exchanger is increased, or if the heat storage means is not provided, the heat exchange amount in the heat exchanger is increased and the hot water supply capacity is increased. And the temperature of the hot water at which the heating means is started up becomes faster.
0014.
Also, claims7In the invention described in the present invention, a bypass pipe provided with an on-off valve provided in parallel with the heating means, a flow rate detecting means for detecting the flow of water in the water supply pipe, and a hot water temperature at which the fluid outlet of the heating means and the bypass pipe merge are used. It is equipped with a temperature detecting means for detecting and a control means for controlling the opening of the on-off valve when the detection temperature of the temperature detecting means is higher than a predetermined temperature in response to the signal of the flow rate detecting means. When the flow of water is detected and the temperature of the hot water at the outlet of the heating means is higher than the predetermined temperature, the heating means is bypassed and the hot water is discharged. Therefore, heat dissipation when flowing through the heating means is also reduced.
0015.
Also, claims8The invention described in the above comprises a configuration in which a heat recovery heat exchanger, a heat exchanger, a heating means, a heat pump circuit, and a bath heat exchanger are housed in one unit, and a ventilation path can be secured as in the use of atmospheric heat. Since it does not exist, it can be installed inside the pipe shaft of an apartment house or indoors, which improves the degree of freedom of installation.
0016.
【Example】
Hereinafter, examples of the present invention will be described with reference to the drawings. In the conventional example and each embodiment, those having the same configuration and the same operation are designated by the same reference numerals, and some description thereof will be omitted.
[0017]
(Example 1)
FIG. 1 is a configuration diagram of a hot water supply system using bath heat according to a first embodiment of the present invention. In FIG. 1, the solid line arrow represents the flow of water supply, and the broken line represents the flow of residual hot water in the bathtub.
0018
1 is a bathtub or a water storage tank for storing domestic wastewater and rainwater, and 2 is a heat recovery heat exchanger that communicates with the bathtub 1. Reference numeral 3 denotes a bath pump, which conveys the residual hot water of the bathtub 1 to the heat recovery heat exchanger 2. Reference numeral 4 denotes a heat exchanger, which has a heat exchange relationship with the heat recovery heat exchanger 2 and allows water supply from the water supply pipe 5 to flow. Reference numeral 6 denotes a heating means, which includes a water heat exchanger 7 and a combustor 8, and is provided in the middle of the water supply pipe 5 of the terminal curan 9 which discharges hot water from the heat exchanger 4, and is provided in the middle of the water supply pipe 5 by the combustion heat of the combustor 8. The water supply from the water supply pipe 5 flowing through the 7 is heated. Reference numeral 10 denotes a temperature detecting means, which detects the temperature of the hot water at the outlet of the heating means 6. Reference numeral 11 denotes a control means, which controls the output of the heating means 6 so that the detection temperature of the temperature detection means 10 becomes a predetermined temperature.
0019
In the above configuration, the operation and operation will be described. When hot water is used in the kitchen, washbasin, shower, etc. after bathing in the bathtub, when the terminal curan 9 is opened, the water supplied from the water supply pipe 5 is left in the bathtub 1 via the heat exchanger 4 and the heat recovery heat exchanger 2. Heat is exchanged with hot water heat. Then, the heated water flows into the heating means 6, and when it flows through the water heat exchanger 7, it is further heated to a higher temperature by the combustion heat of the combustor 8. Then, the output of the heating means 6 is controlled so that the temperature reaches a predetermined temperature at the outlet of the heating means 6, and the hot water is discharged from the terminal curan 9. Therefore, since the fluid that exchanges heat with the residual hot water of the bathtub 1 is the water supply that constantly flows through the water supply pipe 5, the residual hot water heat of the bathtub 1 can be recovered to the water supply temperature.
0020
Further, since the remaining hot water in the bathtub 1 is used for preheating of the heating means 6, the amount of heat generated by the heating means 6 is reduced, which saves energy. Further, since the heating capacity of the heating means 6 can be reduced, the miniaturization can be achieved and the hot water storage tankless can be achieved, so that space saving can be realized. Further, even if the residual hot water temperature of the bathtub decreases with the operation and the heat exchange amount in the heat exchanger decreases, the output of the heating means is controlled, so that the hot water discharge temperature and the hot water supply heat amount are stable.
0021.
Further, when a water storage tank for storing medium-temperature hot water discharged from the home is used instead of the bathtub 1, the same effect can be obtained, and each time hot water is stored in the water storage tank, it can be used for preheating the heating means. Further, even if an electric heater is used as the heating means 6 instead of the combustion heat of the combustor 8, the same effect can be obtained.
0022.
(Example 2)
FIG. 2 is a configuration diagram of a hot water supply system using bath heat according to a second embodiment of the present invention. In FIG. 2, the refrigerant flow of the heat pump circuit is represented by a chain line. Reference numeral 12 denotes a heat recovery heat exchanger, which has a heat exchange relationship with the heat exchanger 4. Reference numeral 13 is a compressor, 14 is an evaporator, and 15 is a decompression means. Reference numeral 16 denotes a heat pump circuit, which includes a heat recovery heat exchanger 12, a compressor 13, an evaporator 14, and a decompression means 15. Reference numeral 17 denotes a bath heat exchanger, which has a heat exchange relationship with the evaporator 14. Reference numeral 18 denotes a bathtub, which is connected to the bath heat exchanger 17.
[0023]
In the above configuration, the operation and operation will be described.
0024
The residual hot water heat of the bathtub 18 is collected by the evaporator 14 of the heat pump 16 via the bath heat exchanger 17. Then, the collected heat is dissipated by the heat recovery heat exchanger 12 to heat the water supply flowing through the heat exchanger 4. Then, the heating means 6 further heats the hot water to a predetermined temperature, and the hot water is discharged and used. Therefore, heat can be collected until the temperature of the remaining hot water in the bathtub becomes lower than the water supply temperature, so that further energy saving can be achieved. Further, when a water storage tank for storing medium-temperature hot water discharged from the home is used instead of the bathtub 18, the same effect can be obtained, and each time hot water is stored in the water storage tank, it can be used for preheating the heating means.
0025
(Example 3)
FIG. 3 is a configuration diagram of a hot water supply system using bath heat according to a third embodiment of the present invention. In FIG. 3, reference numeral 19 denotes a heat storage means, which has a heat exchange relationship with the heat exchanger 4 and the heat recovery heat exchanger 12.
0026
In the above configuration, the operation and operation will be described.
[0027]
The residual hot water in the bathtub collected by the heat pump 16 is stored in the heat storage means 19 via the heat recovery heat exchanger 12 and used for heating the water supplied through the heat storage means 19 at the time of hot water supply.
[0028]
Therefore, even when the hot water supply is not used, the heat of the remaining hot water in the bathtub immediately after bathing is collected, so that the heat storage operation can be performed with high efficiency. In addition, a large amount of heat can be extracted from the heat storage means 19 at the time of hot water supply. Then, the temperature of the hot water flowing out from the heating means 6 rises faster, so that the immediate hot water property is improved.
[0029]
(Example 4)
FIG. 4 is a configuration diagram of a hot water supply system using bath heat according to a fourth embodiment of the present invention. In FIG. 4, reference numeral 20 denotes a heat exchanger utilizing natural heat, which is provided in parallel with the evaporator to collect atmospheric heat or solar heat.
[0030]
In the above configuration, the operation and operation will be described. When there is no water in the bathtub, or when the bathtub water becomes cold due to the heat collected from the residual hot water in the bathtub, the heat pump circuit uses the natural heat utilization heat exchanger 20 as an evaporator. Then, the atmospheric heat or the solar heat is collected here and stored in the heat storage means 19. Therefore, since the amount of heat storage is increased, the economy and convenience are improved.
0031
(Example 5)
FIG. 5 is a configuration diagram of a hot water supply system using bath heat according to a fifth embodiment of the present invention. In FIG. 5, reference numeral 21 denotes a flow rate detecting means, which detects the flow of water in the water supply pipe 5. Reference numeral 22 denotes a control means, which controls to start the operation of the compressor in response to the signal of the flow rate detecting means 21.
[0032]
In the above configuration, the operation and operation will be described.
0033
The flow rate detecting means 21 detects that the water supply has flowed during the hot water supply, sends a signal to the control means 22, starts the operation of the compressor 13, and dissipates heat in the heat recovery heat exchanger 12. Therefore, when the heat storage means 19 is provided, the heat storage amount is replenished and the heat exchange amount in the heat exchanger 4 increases, or when the heat storage means 19 is not provided, the heat exchange amount in the heat exchanger 4 increases. As a result, the hot water supply capacity is improved and the starting hot water temperature of the heating means 6 is also increased.
0034
(Example 6)
FIG. 6 is a block diagram of the heat pump type bath hot water supply system according to the sixth embodiment of the present invention.
0035.
In FIG. 6, reference numeral 23 denotes a bypass pipe, which is provided in parallel with the heating means 6 and includes an on-off valve 24. Reference numeral 25 denotes a flow rate detecting means, which detects the flow of water in the water supply pipe 5. Reference numeral 26 denotes a temperature detecting means, which detects the temperature of the combined hot water of the fluid outlet of the heating means 6 and the bypass pipe 23. Reference numeral 27 denotes a control means, which controls to open the on-off valve 24 when the detection temperature of the temperature detection means 26 is higher than a predetermined temperature in response to the signal of the flow rate detection means 25.
0036
In the above configuration, the operation and operation will be described. At the time of hot water discharge, the flow rate detecting means 25 detects the flow of water in the water supply pipe 5, and when the hot water temperature at the outlet of the heating means 6 is higher than the predetermined temperature, the hot water is discharged by bypassing the heating means 6. Therefore, heat dissipation when flowing through the heating means is also reduced. In addition, the amount of water discharged from the terminal curan increases because the distribution resistance also decreases.
Become. In addition, the amount of water discharged from the terminal curan increases because the distribution resistance also decreases.
0037
(Example 7)
FIG. 7 is a block diagram of the heat pump type bath hot water supply system according to the seventh embodiment of the present invention.
[0038]
In FIG. 7, 28 is a hot water supply unit, and the heat recovery heat exchangers 2 and 12, the heat exchanger 4, the heating means 6, the heat pump circuit 16, and the bath heat exchanger 17 are housed in one unit.
[0039]
In the above configuration, the operation and operation will be described. Since it does not secure a ventilation path unlike the use of atmospheric heat, it can be installed inside the pipe shaft of an apartment house or indoors, which improves the degree of freedom of installation.
0040
【Effect of the invention】
As is clear from the above explanation,BookAccording to the inventionFor example, bathtubThe residual hot water heat can be recovered up to the water supply temperature. In addition, it is possible to save energy, reduce the size of the heating means, and eliminate the hot water storage tank by using it for preheating the heating means while collecting the remaining hot water in the bathtub. In addition, it is possible to stabilize the hot water temperature and the amount of heat supplied.
[Simple explanation of drawings]
FIG. 1
Block diagram of hot water supply system using bath heat of Example 1 of this invention
FIG. 2
Configuration diagram of the hot water supply system using bath heat according to the second embodiment of the present invention
FIG. 3
Configuration diagram of the hot water supply system using bath heat according to the third embodiment of the present invention
FIG. 4
Configuration diagram of the hot water supply system using bath heat according to the fourth embodiment of the present invention.
FIG. 5
Configuration diagram of the hot water supply system using bath heat according to the fifth embodiment of the present invention.
FIG. 6
Configuration diagram of the hot water supply system using bath heat according to the sixth embodiment of the present invention
FIG. 7
Configuration diagram of the hot water supply system using bath heat according to the seventh embodiment of the present invention.
FIG. 8
Configuration diagram of a conventional hot water supply system using bath heat
[Explanation of symbols]
1 bathtub
2 Heat recovery heat exchanger
3 bath pump
4 heat exchanger
5 Water supply pipe
6 Heating means
7 Water heat exchanger
8 Combustor
9 Terminal Callan
10 Temperature detecting means
11 Control means
12 Bath heat recovery heat exchanger
13 Compressor
14 evaporator
15 Decompression means
16 heat pump circuit
17 Bath heat exchanger
18 bathtub
19 Heat storage means
20 Heat exchanger using natural heat
21 Flow rate detecting means
22 Control means
23 Bypass pipe
24 on-off valve
25 Flow rate detecting means
26 Temperature detecting means
27 Control means
28 Hot water supply unit