JP2004232978A - Heat pump type hot water supply and heating apparatus - Google Patents

Heat pump type hot water supply and heating apparatus Download PDF

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Publication number
JP2004232978A
JP2004232978A JP2003022908A JP2003022908A JP2004232978A JP 2004232978 A JP2004232978 A JP 2004232978A JP 2003022908 A JP2003022908 A JP 2003022908A JP 2003022908 A JP2003022908 A JP 2003022908A JP 2004232978 A JP2004232978 A JP 2004232978A
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Prior art keywords
hot water
heat exchanger
water
storage tank
valve
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JP2003022908A
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JP3869804B2 (en
Inventor
Koji Namikata
浩二 南方
Tadao Okada
忠夫 岡田
Kiyoshi Koyama
清 小山
Satoshi Hoshino
聡 星野
Yoshinori Enya
義徳 遠谷
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Sanyo Electric Co Ltd
Sanyo Electric Air Conditioning Co Ltd
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Sanyo Electric Co Ltd
Sanyo Electric Air Conditioning Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump type hot water supply and heating apparatus capable of providing also heating hot water with sufficient temperature by performing heat exchange in a heat exchanger in which hot water for hot water supply and bath in a hot water storage tank is used as a heat medium. <P>SOLUTION: This apparatus comprises a refrigerant circuit R having a compressor 13, a water refrigerant heat exchanger 14, a decompressing device 17 (19), and an air heat exchanger 20, a first hot water circulation passage C1 for circulating stored hot water between the water refrigerant heat exchanger 14 and the hot water storage tank 23, a second hot water circulation passage C2 for circulating the stored hot water between a first water heat exchanger 5 and the hot water storage tank 23, a third hot water circulation passage C3 for circulating the stored hot water between a second water heat exchange 29 and the hot water storage tank 23, a fourth hot water circulation passage C4 for circulating hot water between the first water heat exchanger 5 and a hot water heater 1 (11), and a fifth hot water circulation passage C5 for circulating hot water for reheating between the second water heat exchanger 29 and a bath tub. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、ＨＦＣやＣＯ２等の冷媒を用いたヒートポンプ式給湯暖房装置に関する。
【０００２】
【従来の技術】
従来のこの種のヒートポンプ式給湯暖房装置は、ヒートポンプユニットで熱交換して得られた高温水を貯湯タンクに貯湯・蓄熱し、このタンクの高温水を給湯や風呂に使用するとともに、この高温水と熱交換して得られた暖房用温水を用いて温水暖房を行うものが知られている。しかし、このものでは、暖房負荷が大きいと、十分な温度の温水が得られないものであった。
【０００３】
もちろん、貯湯タンクの貯湯水をそのままファンコイル等の温水暖房器に循環供給すれば、上述した問題は解消されるが、貯湯タンクには上水道が接続されているため、暖房用温水が上水道に接することになり、この方式は上水保全の点から採用することができないものであった。
【０００４】
また、ヒートポンプユニットの冷媒回路に貯湯用の水冷媒熱交換器を組み込み、この水冷媒熱交換器で加熱された湯を貯湯タンクに貯留可能とし、この貯湯タンクの天部又は中間部から選択的に出湯させるものが知られている（例えば、特許文献１参照）。
【０００５】
ところが、このものでは、貯湯タンク内の高温水を給湯や風呂の追い焚きに使用しているが、温水暖房運転には使用していないものであった。
【０００６】
【特許文献１】
特開２００２−２４３２７４号公報
【０００７】
【発明が解決しようとする課題】
そこで本発明は、貯湯タンク内の給湯及び風呂用の高温水を熱媒として、熱交換器において熱交換することで、十分な温度の暖房用温水も得られるヒートポンプ式給湯暖房装置を提供することを目的とする。
【０００８】
【課題を解決するための手段】
このため第１の発明は、圧縮機、水冷媒熱交換器、減圧装置及び空気熱交換器を有する冷媒回路と、前記水冷媒熱交換器と貯湯タンクとの間で貯湯水を循環させる第１温水循環路と、第１水々熱交換器と貯湯タンクとの間で貯湯水を循環させる第２温水循環路と、第２水々熱交換器と貯湯タンクとの間で貯湯水を循環させる第３温水循環路と、前記第１水々熱交換器と温水暖房器との間で温水を循環させる第４温水循環路と、前記第２水々熱交換器と浴槽との間で追い焚きのために温水を循環させる第５温水循環路とを備えたことを特徴とする。
【０００９】
第２の発明は、第１の発明において、前記第２温水循環路及び前記第３温水循環路内に温水を循環させる循環ポンプを共通のものを使用することを特徴とする。
【００１０】
第３の発明は、第１及び第２の発明において、前記圧縮機は能力調整が可能なものであることを特徴とする。
【００１１】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づき説明する。図１はヒートポンプ式給湯暖房装置の全体システムを示す系統図である。図１において、Ａはヒートポンプユニット、Ｂはタンクユニット、ＲはヒートポンプユニットＡに内蔵された冷媒回路、後述する水冷媒熱交換器１４と貯湯タンク２３との間で貯湯水を循環させる第１温水循環路Ｃ１と、第１水々熱交換器５と貯湯タンク２３との間で貯湯水を循環させる第２温水循環路Ｃ２と、第２水々熱交換器２９と貯湯タンク２３との間で貯湯水を循環させる第３温水循環路Ｃ３と、前記第１水々熱交換器５と温水暖房器である床暖房パネル１や浴室暖房用のファンコイル１１との間で温水を循環させる第４温水循環路Ｃ４と、前記第２水々熱交換器２９と浴槽３４との間で追い焚きのために温水を循環させる第５温水循環路Ｃ５とを備える。そして、ＨＦＣやＣＯ２等の冷媒を用いることができるが、本実施形態ではＣＯ２を用いる。
【００１２】
１は第４温水循環路Ｃ４に設けられた床暖房パネル、２は床暖房パネル１に対応して設けられた床暖房リモートコントローラ（以下、「床暖房リモコン」という）であり、前記第４温水循環路Ｃ４には、膨張タンク３、循環ポンプ４、第１水々熱交換器５の水流路５Ｂ、熱動弁６、バイパス管７などが設けられている。８は床暖房パネル１に流入する温水温度を検知するサーミスタで、９は浴室暖房リモートコントローラ（以下、「浴室暖房リモコン」という）、１０はファンコイルの１１の入口部に設けられた熱動弁、１２は浴室暖房用のファンコイル１１に流入する温水温度を検出するサーミスタである。
【００１３】
前記冷媒回路Ｒは、ＣＯ２冷媒を用いた能力調整が可能な２段圧縮式の圧縮機１３と、水冷媒熱交換器１４の冷媒流路１４Ａ、内部熱交換器１５の一次流路１５Ａと第１開閉弁１６と第１膨張弁（減圧装置）１７よりなる第１分岐路Ｐ１と、第２開閉弁１８と第２膨張弁（減圧装置）１９よりなる第２分岐路Ｐ２と、空気熱交換器２０と、内部熱交換器１５の二次流路１５Ｂと、アキュムレーター２１とが順次環状に配管接続されている。
【００１４】
前記第１温水循環路Ｃ１は、水冷媒熱交換器１４の水流路１４Ｂと貯湯タンク２３とが循環ポンプ２４、流量調整弁２５を介して環状に接続されている。２６は水冷媒熱交換器１４の水流路１４Ｂから流出した温水温度を検知するサーミスタである。
【００１５】
前記第１水々熱交換器５と貯湯タンク２３との間で貯湯水を循環させる第２温水循環路Ｃ２が形成され、また第２水々熱交換器２９と貯湯タンク２３との間で貯湯水を循環させる第３温水循環路Ｃ３が形成される。即ち、前記貯湯タンク２３には前記第１水々熱交換器５の一次流路５Ａ及び開閉弁２８の第１分岐路Ｐ３と水々熱交換器２９の一次流路２９Ａ及び開閉弁３０の第２分岐路Ｐ４が循環ポンプ３１を介して接続されている。
【００１６】
また、前記第２水々熱交換器２９と浴槽３４との間で追い焚きのために温水を循環させる第５温水循環路Ｃ５が形成される。即ち、水々熱交換器２９の二次流路２９Ｂには循環ポンプ３３を介して浴槽３４が接続されている。３５はミキシングバルブ３６を介して貯湯タンク２３の上部に接続された給湯管である。３８は給水管であり、この給水管３８は貯湯タンク２３の下部とミキシングバルブ３６とに分岐接続され、更に開閉弁３９を介して膨張タンク３に接続されている。
【００１７】
また、ヒートポンプユニットＡとタンクユニットＢにはそれぞれマイクロコンピュータから成る制御装置（制御手段）Ｓ１、Ｓ２が設けられている。この制御装置Ｓ１、Ｓ２は床暖房リモコン２や浴室暖房用ファンコイル１１からの運転信号や温度信号と、サーミスタ８、１２、２６の温度信号とに応じて、圧縮機１３の運転と周波数制御、循環ポンプ４、２４、３１、３３の運転制御、熱動弁６、第１及び第２膨張弁１７、１９の開度制御、流量調整弁２５の開度制御などを行うものであり、以下その動作を説明する。
【００１８】
〈床暖房運転〉
床暖房パネル１による床暖房を行う場合、その部屋の壁面等に取り付けられた床暖房リモコン２の運転スイッチをオンにする。すると、第２温水循環路Ｃ２において、開閉弁２８が開くと共に循環ポンプ３１が運転し、貯湯タンク２３→第１水々熱交換器５の一次流路５Ａ→開閉弁２８→循環ポンプ３１→貯湯タンク２３の順に温水が流れる。更に、熱動弁６が開き、循環ポンプ４が運転し、第４温水循環路Ｃ４では、膨張タンク３→循環ポンプ４→第１水々熱交換器５の水流路５Ｂ→バイパス管７→膨張タンク３の順に温水が流れると共に、膨張タンク３→循環ポンプ４→熱動弁６→床暖房パネル１→膨張タンク３の順に温水が流れる。なお、バイパス管７は、第１水々熱交換器５で熱交換して得られた温水を床暖房パネル１からの戻り水に混ぜるものである。
【００１９】
床暖房パネル１に供給される温水の温度は６０〜７０℃であるが、サーミスタ８で検知する温水温度がこの温度になるように、上述した温水循環が行われる。
【００２０】
長時間、床暖房を行うことにより貯湯タンク２３の熱容量が低下し、サーミスタ８で検知する温水温度が６０〜７０℃に達しなくなった場合は、ヒートポンプユニットＡの圧縮機１３が運転すると共に第１開閉弁１６が開き、冷媒回路Ｒでは、圧縮機１３→水冷媒熱交換器１４の冷媒流路１４Ａ→内部熱交換器１５の一次流路１５Ａ→第１開閉弁１６→第１膨張弁１７→空気熱交換器２０→内部熱交換器１５の二次流路１５Ｂ→アキュムレーター２１→圧縮機１３の順に冷媒が流れる。このとき、第２開閉弁１８及び第２膨張弁１９は閉じており、第２分岐路Ｐ２には冷媒は流れない。また、循環ポンプ２４が運転し、第１温水循環路Ｃ１では、貯湯タンク２３→循環ポンプ２４→水冷媒熱交換器１４の水流路１４Ｂ→流量調整弁２５→貯湯タンク２３の順に温水が流れ、貯湯タンク２３に貯湯される。貯湯された高温水は上述した温水循環により、暖房温水の熱交換用として使用される。
【００２１】
また、床暖房制御は、床暖房リモコン２に搭載された室温サーミスタ（図示せず）により室温を検知し、設定温度と室温との偏差に基づき熱動弁６を開閉制御し、床暖房パネル１への温水量を制御することにより行われる。
【００２２】
〈浴室暖房運転〉
ファンコイル１１による浴室の温風暖房を行う場合、浴室暖房リモコン９をオンにする。すると、ファンコイル１１入口部の熱動弁１０が開き、循環ポンプ４が運転する。第４温水循環路Ｃ４では、膨張タンク３→循環ポンプ４→第１水々熱交換器５の水流路５Ｂ→熱動弁１０→ファンコイル１１→膨張タンク３の順に温水が流れる。バイパス管７は、熱動弁１０が開くのに時間がかかり、また熱動弁１０が故障している場合でも対応できるように、温水の一部をバイパスさせるものであり、微少量の温水が流れる。
【００２３】
第２温水循環路Ｃ２の温水循環は床暖房運転と同様である。前記ファンコイル１１に供給される温水の温度は８０℃であるが、サーミスタ１２で検知する温水温度がこの温度となるように、上述した温水循環が行われる。また、浴室暖房制御はファンコイル１１に搭載された室温サーミスタ（図示せず）により室温を検知し、ファン回転数を制御し、熱動弁１０を開閉制御することにより行われる。
【００２４】
長時間、浴室暖房運転を行うことにより、貯湯タンク２３の熱容量が低下し、サーミスタ１２で検知する温水温度が８０℃に達しなくなった場合は、ヒートポンプユニットＡが動作する。ヒートポンプユニットＡの動作と冷媒循環は床暖房運転と同様であり、第２開閉弁１８及び第２膨張弁１９は閉じており、第２分岐路Ｐ２には冷媒は流れない。
【００２５】
〈床暖房と浴室暖房の同時運転〉
床暖房パネル１による床暖房と、ファンコイル１１による浴室温風暖房を同時に行う場合、それぞれのリモコン２、９の運転スイッチをオンにする。すると、熱動弁６、１０が開き、循環ポンプ４が運転し、膨張タンク３→循環ポンプ４→第１水々熱交換器５の水流路５Ｂ→バイパス管７→膨張タンク３の順に温水が流れると共に膨張タンク３→循環ポンプ４→熱動弁６→床暖房パネル１→膨張タンク３の順に温水が流れ、また膨張タンク３→循環ポンプ４→第１水々熱交換器５の水流路５Ｂ→熱動弁１０→ファンコイル１１→膨張タンク３の順に温水が流れる。
【００２６】
バイパス管７は、熱動弁６、１０が開くのに時間がかかり、また熱動弁６、１０が故障している場合でも対応できるように、温水の一部をバイパスさせるものであり、なおかつ第１水々熱交換器５で熱交換して得られた温水を床暖房パネル１からの戻り水に混ぜるものであり、微少量の温水が流れる。
【００２７】
ヒートポンプユニットＡの動作と冷媒循環は床暖房運転と同様であり、第２開閉弁１８及び第２膨張弁１９は閉じており、第２分岐路Ｐ２には冷媒は流れない。
【００２８】
〈貯湯運転〉
貯湯タンク２３に貯湯を行う場合、循環ポンプ２４が運転し、第１温水循環路Ｃ１では、貯湯タンク２３→循環ポンプ２４→水冷媒熱交換器１４の水流路１４Ｂ→流量調整弁２５→貯湯タンク２３の順に貯湯用の温水が流れ、貯湯タンク２３に貯湯される。
【００２９】
ヒートポンプユニットＡでは圧縮機１３が運転すると共に第２開閉弁１８が開き、冷媒回路Ｒでは、圧縮機１３→水冷媒熱交換器１４の一次流路１４Ａ→開閉弁１８→第２膨張弁１９→空気熱交換器２０→内部熱交換器１５の二次流路１５Ｂ→アキュムレーター２１→圧縮機１３の順に冷媒が流れる。このとき、暖房は行われないので、第１開閉弁１６及び第１膨張弁１７は閉じており、第１分岐路Ｐ１には冷媒は流れない。また、内部熱交換器１５の二次流路１５Ｂでは冷媒がただ通過するだけで、他に影響を及ぼすことはない。
【００３０】
暖房運転の後などで、貯湯タンク２３が一様温度となり、第１温水循環路Ｃ１において、水冷媒熱交換器１４の二次流路１４Ｂへ供給される温水の温度が仮に４０℃以上となる場合には、第２開閉弁１８及び第２膨張弁１９を閉じ、第１開閉弁１６及び第１膨張弁１７を開ける。このとき、冷媒回路Ｒでは、床暖房運転や浴室暖房運転の場合と同様の冷媒循環経路となる。
【００３１】
貯湯タンク２３へ供給される温水温度は９０℃であるが、サーミスタ２６が検知する温度がこの温度になるように、圧縮機１３の周波数制御、第２膨張弁１９（１７）の弁開度制御、流量調整弁２５の弁開度制御が行われる。
【００３２】
貯湯タンク２３に貯湯された高温水はミキシングバルブ３６にて適度な温度に調整され、給湯管３５から台所やシャワーへの給湯や浴槽３４へのお湯張り等に利用される。そして、給湯が行われると、給水管３８から貯湯タンク２３に給水が行われる。
【００３３】
また、開閉弁２８を閉じると共に開閉弁３０を開き、また循環ポンプ３１、３３を運転することにより、第３及び第５温水循環路Ｃ３、Ｃ５において、貯湯タンク２３の高温水と浴槽３４の温水を水々熱交換器２９で熱交換し、浴槽３４の温水の追い焚きを行うことができる。この場合、前記第２温水循環路Ｃ２及び前記第３温水循環路Ｃ３内に温水を循環させる循環ポンプ３１を共通のものを使用するから、部品点数も少なく、安価な装置となる。
【００３４】
〈暖房と貯湯の同時運転〉
この場合の暖房用温水の循環経路は上述したとおりである。冷媒回路Ｒでは、第１開閉弁１６が開き、圧縮機１３→水冷媒熱交換器１４の冷媒流路１４Ａ→内部熱交換器１５の一次流路１５Ａ→第１開閉弁１６→第１膨張弁１７→空気熱交換器２０→内部熱交換器１５の二次流路１５Ｂ→アキュムレーター２１→圧縮機１３の順に冷媒が流れる。このとき、水冷媒熱交換器１４及び内部熱交換器１５で熱交換が行われるのは言うまでもない。
【００３５】
また、サーミスタ８、１２、２６においてそれぞれ上述した目標温度になるように、圧縮機１３の周波数制御、第１膨張弁１７の弁開度制御、流量調整弁２５の弁開度制御が行われる。同時運転が行われた場合には、圧縮機１３は最大能力で運転するようにしてあり、暖房側と貯湯側とで十分な能力が得られるようにしてある。
【００３６】
以上本発明の実施態様について説明したが、上述の説明に基づいて当業者にとって種々の代替例、修正又は変形が可能であり、本発明の趣旨を逸脱しない範囲で前述の種々の代替例、修正又は変形を包含するものである。
【００３７】
【発明の効果】
以上のように本発明は、貯湯タンク内の給湯及び風呂用の高温水を熱媒として、熱交換器において熱交換することで、十分な温度の暖房用温水も得られるヒートポンプ式給湯暖房装置を提供することができる。
【図面の簡単な説明】
【図１】ヒートポンプ式給湯暖房装置の全体系統図である。
【符号の説明】
Ａ ヒートポンプユニット
Ｂ タンクユニット
Ｃ１ 第１温水循環路
Ｃ２ 第２温水循環路
Ｃ３ 第３温水循環路
Ｃ４ 第４温水循環路
Ｃ５ 第５温水循環路
Ｐ１、Ｐ３ 第１分岐路
Ｐ２、Ｐ４ 第２分岐路
Ｒ 冷媒回路
１ 床暖房パネル（温水暖房器）
５ 水々熱交換器
１１ ファンコイル
１３ 圧縮機
１７ 第１膨張弁（減圧装置）
１９ 第２膨張弁（減圧装置）
２０ 空気熱交換器
２３ 貯湯タンク
２８、３０ 開閉弁
２９ 水々熱交換器
３１ 循環ポンプ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat pump hot water supply / room heating device using a refrigerant such as HFC or CO 2 .
[0002]
[Prior art]
Conventional heat pump hot water supply and heating devices of this type store and store high-temperature water obtained by heat exchange in a heat pump unit in a hot water storage tank, use the high-temperature water in the tank for hot water supply and bathing, and use this high-temperature water Is known that performs hot water heating using heating hot water obtained by heat exchange with water. However, in this case, if the heating load is large, hot water having a sufficient temperature cannot be obtained.
[0003]
Of course, if the hot water in the hot water storage tank is circulated and supplied to the hot water heater such as a fan coil as it is, the above-mentioned problem is solved. Therefore, this method could not be adopted from the viewpoint of water conservation.
[0004]
Also, a water refrigerant heat exchanger for storing hot water is incorporated in the refrigerant circuit of the heat pump unit, and the hot water heated by the water refrigerant heat exchanger can be stored in the hot water storage tank. It is known that hot water is supplied to a hot spring (see, for example, Patent Document 1).
[0005]
However, in this case, high-temperature water in the hot water storage tank is used for hot water supply and reheating of the bath, but is not used for hot water heating operation.
[0006]
[Patent Document 1]
JP-A-2002-243274
[Problems to be solved by the invention]
Accordingly, the present invention provides a heat pump hot water supply / room heating device capable of obtaining a sufficient temperature of heating water by performing heat exchange in a heat exchanger using hot water for hot water supply in a hot water storage tank and bath as a heat medium. With the goal.
[0008]
[Means for Solving the Problems]
Therefore, the first invention provides a refrigerant circuit having a compressor, a water refrigerant heat exchanger, a pressure reducing device, and an air heat exchanger, and a first circuit for circulating hot water between the water refrigerant heat exchanger and the hot water storage tank. A hot water circulation path, a second hot water circulation path for circulating hot water between the first water heat exchanger and the hot water storage tank, and a hot water circulation between the second water heat exchanger and the hot water storage tank A third hot water circuit, a fourth hot water circuit for circulating hot water between the first water heat exchanger and the hot water heater, and reheating between the second water heat exchanger and the bathtub And a fifth hot-water circulation circuit for circulating hot water.
[0009]
A second invention is characterized in that, in the first invention, a common circulating pump for circulating hot water in the second hot water circulation path and the third hot water circulation path is used.
[0010]
A third invention is characterized in that in the first and second inventions, the compressor is capable of adjusting its capacity.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a system diagram showing an entire system of a heat pump hot water supply / room heating device. In FIG. 1, A is a heat pump unit, B is a tank unit, R is a refrigerant circuit built in the heat pump unit A, and first hot water for circulating hot water between a water / refrigerant heat exchanger 14 and a hot water storage tank 23 described later. A circulation path C1, a second hot water circulation path C2 for circulating hot water between the first water heat exchanger 5 and the hot water storage tank 23, and a second hot water circulation path C2 between the second water heat exchanger 29 and the hot water storage tank 23; A third hot water circulation path C3 for circulating hot water, and a fourth hot water circulation between the first water heat exchanger 5 and the floor heating panel 1 or the fan coil 11 for bathroom heating, which are hot water heaters. A hot water circuit C4 and a fifth hot water circuit C5 for circulating hot water for reheating between the second water heat exchanger 29 and the bathtub 34 are provided. A refrigerant such as HFC or CO 2 can be used, but in this embodiment, CO 2 is used.
[0012]
1 is a floor heating panel provided in the fourth hot water circulation path C4, 2 is a floor heating remote controller (hereinafter referred to as “floor heating remote controller”) provided corresponding to the floor heating panel 1, and the fourth hot water The circulation path C4 is provided with an expansion tank 3, a circulation pump 4, a water flow path 5B of the first water heat exchanger 5, a thermal valve 6, a bypass pipe 7, and the like. Reference numeral 8 denotes a thermistor for detecting the temperature of hot water flowing into the floor heating panel 1, reference numeral 9 denotes a bathroom heating remote controller (hereinafter referred to as "bathroom heating remote control"), and reference numeral 10 denotes a thermal valve provided at an inlet of a fan coil 11. , 12 are thermistors for detecting the temperature of hot water flowing into the fan coil 11 for heating the bathroom.
[0013]
The refrigerant circuit R includes a two-stage compression type compressor 13 capable of adjusting the capacity using a CO 2 refrigerant, a refrigerant flow path 14A of a water refrigerant heat exchanger 14, a primary flow path 15A of an internal heat exchanger 15, and A first branch P1 including a first on-off valve 16 and a first expansion valve (pressure reducing device) 17, a second branch P2 including a second on-off valve 18 and a second expansion valve (pressure reducing device) 19, and air heat The exchanger 20, the secondary flow path 15 </ b> B of the internal heat exchanger 15, and the accumulator 21 are sequentially piped and connected in a ring shape.
[0014]
In the first hot water circulation path C1, a water flow path 14B of the water / refrigerant heat exchanger 14 and a hot water storage tank 23 are annularly connected via a circulation pump 24 and a flow rate adjustment valve 25. Reference numeral 26 denotes a thermistor for detecting the temperature of hot water flowing out of the water flow path 14B of the water-refrigerant heat exchanger 14.
[0015]
A second hot water circulation path C2 for circulating hot water is formed between the first water heat exchanger 5 and the hot water storage tank 23, and hot water is stored between the second water heat exchanger 29 and the hot water storage tank 23. A third hot water circulation path C3 for circulating water is formed. That is, in the hot water storage tank 23, the primary flow path 5A of the first water-heat exchanger 5 and the first branch path P3 of the on-off valve 28 and the primary flow path 29A of the water-heat exchanger 29 and the second flow path of the on-off valve 30 The two branches P4 are connected via the circulation pump 31.
[0016]
A fifth hot water circulation path C5 is formed between the second water heat exchanger 29 and the bathtub 34 for circulating hot water for reheating. That is, the bathtub 34 is connected to the secondary flow path 29 </ b> B of the water heat exchanger 29 via the circulation pump 33. Reference numeral 35 denotes a hot water supply pipe connected to an upper portion of the hot water storage tank 23 via a mixing valve 36. Reference numeral 38 denotes a water supply pipe. The water supply pipe 38 is branched and connected to a lower portion of the hot water storage tank 23 and the mixing valve 36, and further connected to the expansion tank 3 via an on-off valve 39.
[0017]
The heat pump unit A and the tank unit B are provided with control devices (control means) S1 and S2 each including a microcomputer. The control devices S1 and S2 control the operation of the compressor 13 and the frequency control according to the operation signal and the temperature signal from the floor heating remote controller 2 and the bathroom heating fan coil 11 and the temperature signals of the thermistors 8, 12, and 26, respectively. The operation control of the circulation pumps 4, 24, 31, and 33, the opening control of the thermal valve 6, the first and second expansion valves 17 and 19, the opening control of the flow control valve 25, and the like are performed. The operation will be described.
[0018]
<Floor heating operation>
When floor heating is performed by the floor heating panel 1, the operation switch of the floor heating remote controller 2 attached to the wall surface or the like of the room is turned on. Then, in the second hot water circulation path C2, the on-off valve 28 opens and the circulation pump 31 operates, and the hot water storage tank 23 → the primary flow path 5A of the first water / water heat exchanger 5 → the on-off valve 28 → the circulation pump 31 → hot water storage Hot water flows in the order of the tank 23. Further, the thermal valve 6 is opened, the circulation pump 4 is operated, and in the fourth hot water circulation path C4, the expansion tank 3 → the circulation pump 4 → the water flow path 5B of the first water heat exchanger 5 → the bypass pipe 7 → the expansion. The hot water flows in the order of the tank 3, and the hot water flows in the order of the expansion tank 3, the circulation pump 4, the thermal valve 6, the floor heating panel 1, and the expansion tank 3. The bypass pipe 7 mixes hot water obtained by exchanging heat in the first water heat exchanger 5 with return water from the floor heating panel 1.
[0019]
Although the temperature of the hot water supplied to the floor heating panel 1 is 60 to 70 ° C., the above-described hot water circulation is performed so that the hot water temperature detected by the thermistor 8 becomes this temperature.
[0020]
If the heat capacity of the hot water storage tank 23 is reduced by performing floor heating for a long time and the hot water temperature detected by the thermistor 8 does not reach 60 to 70 ° C., the compressor 13 of the heat pump unit A operates and the first The on-off valve 16 is opened, and in the refrigerant circuit R, the compressor 13 → the refrigerant flow path 14A of the water-refrigerant heat exchanger 14 → the primary flow path 15A of the internal heat exchanger 15 → the first on-off valve 16 → the first expansion valve 17 → The refrigerant flows in the order of the air heat exchanger 20 → the secondary flow path 15B of the internal heat exchanger 15 → the accumulator 21 → the compressor 13. At this time, the second on-off valve 18 and the second expansion valve 19 are closed, and no refrigerant flows through the second branch P2. Further, the circulation pump 24 is operated, and in the first hot water circulation path C1, hot water flows in the order of the hot water storage tank 23 → the circulation pump 24 → the water flow path 14B of the water / refrigerant heat exchanger 14 → the flow control valve 25 → the hot water storage tank 23, Hot water is stored in hot water storage tank 23. The stored hot water is used for heat exchange of heating hot water by the above-described hot water circulation.
[0021]
In the floor heating control, a room temperature thermistor (not shown) mounted on the floor heating remote controller 2 detects the room temperature, and controls the opening and closing of the thermal valve 6 based on the deviation between the set temperature and the room temperature. This is done by controlling the amount of hot water to
[0022]
<Bathroom heating operation>
When performing warm air heating of the bathroom by the fan coil 11, the bathroom heating remote control 9 is turned on. Then, the thermal valve 10 at the inlet of the fan coil 11 opens, and the circulation pump 4 operates. In the fourth hot water circulation path C4, hot water flows in the order of the expansion tank 3, the circulation pump 4, the water flow path 5B of the first water heat exchanger 5, the thermal valve 10, the fan coil 11, and the expansion tank 3. The bypass pipe 7 bypasses a part of the hot water so that it takes time for the thermal valve 10 to open and can cope with the case where the thermal valve 10 is out of order. Flows.
[0023]
The hot water circulation in the second hot water circulation path C2 is similar to the floor heating operation. Although the temperature of the hot water supplied to the fan coil 11 is 80 ° C., the above-described hot water circulation is performed so that the hot water temperature detected by the thermistor 12 becomes this temperature. Further, the bathroom heating control is performed by detecting the room temperature by a room temperature thermistor (not shown) mounted on the fan coil 11, controlling the fan rotation speed, and controlling the opening and closing of the thermal valve 10.
[0024]
If the heat capacity of the hot water storage tank 23 decreases by performing the bathroom heating operation for a long time, and the hot water temperature detected by the thermistor 12 does not reach 80 ° C., the heat pump unit A operates. The operation of the heat pump unit A and the circulation of the refrigerant are the same as in the floor heating operation, the second on-off valve 18 and the second expansion valve 19 are closed, and no refrigerant flows through the second branch P2.
[0025]
<Simultaneous operation of floor heating and bathroom heating>
When the floor heating by the floor heating panel 1 and the room temperature air heating by the fan coil 11 are simultaneously performed, the operation switches of the remote controllers 2 and 9 are turned on. Then, the thermal valves 6 and 10 are opened, the circulation pump 4 is operated, and the hot water flows in the order of the expansion tank 3 → the circulation pump 4 → the water flow path 5B of the first water heat exchanger 5 → the bypass pipe 7 → the expansion tank 3. At the same time, hot water flows in the order of expansion tank 3 → circulation pump 4 → thermal valve 6 → floor heating panel 1 → expansion tank 3; and expansion tank 3 → circulation pump 4 → water flow path 5B of first water heat exchanger 5 The hot water flows in the order of the heat valve 10 → the fan coil 11 → the expansion tank 3.
[0026]
The bypass pipe 7 bypasses a portion of the hot water so that it takes time for the thermal valves 6, 10 to open, and can cope with a failure of the thermal valves 6, 10. The hot water obtained by heat exchange in the first water heat exchanger 5 is mixed with the return water from the floor heating panel 1, and a small amount of hot water flows.
[0027]
The operation of the heat pump unit A and the circulation of the refrigerant are the same as in the floor heating operation, the second on-off valve 18 and the second expansion valve 19 are closed, and no refrigerant flows through the second branch P2.
[0028]
<Hot water storage operation>
When hot water is stored in the hot water storage tank 23, the circulation pump 24 is operated, and in the first hot water circulation path C1, the hot water storage tank 23 → the circulation pump 24 → the water flow path 14B of the water / refrigerant heat exchanger 14 → the flow control valve 25 → the hot water storage tank. Hot water for storing hot water flows in the order of 23 and is stored in the hot water storage tank 23.
[0029]
In the heat pump unit A, the compressor 13 operates and the second on-off valve 18 opens, and in the refrigerant circuit R, the compressor 13 → the primary flow path 14A of the water-refrigerant heat exchanger 14 → the on-off valve 18 → the second expansion valve 19 → The refrigerant flows in the order of the air heat exchanger 20 → the secondary flow path 15B of the internal heat exchanger 15 → the accumulator 21 → the compressor 13. At this time, since no heating is performed, the first on-off valve 16 and the first expansion valve 17 are closed, and no refrigerant flows through the first branch P1. Further, in the secondary flow path 15B of the internal heat exchanger 15, the refrigerant merely passes, and does not affect the other.
[0030]
After the heating operation or the like, the temperature of the hot water storage tank 23 becomes uniform, and the temperature of the hot water supplied to the secondary flow path 14B of the water-refrigerant heat exchanger 14 in the first hot water circulation path C1 temporarily becomes 40 ° C. or more. In this case, the second on-off valve 18 and the second expansion valve 19 are closed, and the first on-off valve 16 and the first expansion valve 17 are opened. At this time, in the refrigerant circuit R, the refrigerant circulation path is the same as in the floor heating operation or the bathroom heating operation.
[0031]
Although the temperature of the hot water supplied to the hot water storage tank 23 is 90 ° C., the frequency control of the compressor 13 and the valve opening control of the second expansion valve 19 (17) are performed so that the temperature detected by the thermistor 26 becomes this temperature. Then, the valve opening control of the flow control valve 25 is performed.
[0032]
The high-temperature water stored in the hot water storage tank 23 is adjusted to an appropriate temperature by a mixing valve 36, and is used for hot water supply from a hot water supply pipe 35 to a kitchen or a shower, hot water filling a bathtub 34, and the like. Then, when hot water is supplied, water is supplied from the water supply pipe 38 to the hot water storage tank 23.
[0033]
In addition, by opening and closing the on-off valve 28 and opening the on-off valve 30 and operating the circulation pumps 31 and 33, the hot water in the hot water storage tank 23 and the hot water in the bathtub 34 in the third and fifth hot water circulation paths C3 and C5. Is heat-exchanged by the water-to-water heat exchanger 29 to reheat the hot water in the bathtub 34. In this case, since a common circulating pump 31 for circulating hot water in the second hot water circulation path C2 and the third hot water circulation path C3 is used, the number of parts is small and the apparatus is inexpensive.
[0034]
<Simultaneous operation of heating and hot water storage>
The circulation path of the heating hot water in this case is as described above. In the refrigerant circuit R, the first on-off valve 16 is opened, and the compressor 13 → the refrigerant flow path 14A of the water-refrigerant heat exchanger 14 → the primary flow path 15A of the internal heat exchanger 15 → the first on-off valve 16 → the first expansion valve. The refrigerant flows in the order of 17 → air heat exchanger 20 → secondary flow path 15B of internal heat exchanger 15 → accumulator 21 → compressor 13. At this time, it goes without saying that heat exchange is performed in the water-refrigerant heat exchanger 14 and the internal heat exchanger 15.
[0035]
Further, the frequency control of the compressor 13, the valve opening control of the first expansion valve 17, and the valve opening control of the flow control valve 25 are performed so that the thermistors 8, 12, and 26 have the above-described target temperatures, respectively. When the simultaneous operation is performed, the compressor 13 is operated at the maximum capacity so that sufficient capacity can be obtained on the heating side and the hot water storage side.
[0036]
Although the embodiments of the present invention have been described above, various alternatives, modifications, or variations are possible for those skilled in the art based on the above description, and the various alternatives, modifications, and modifications described above may be made without departing from the spirit of the present invention. Or, it includes modifications.
[0037]
【The invention's effect】
As described above, the present invention provides a heat pump hot water supply / room heating device in which hot water for heating at a sufficient temperature can be obtained by performing heat exchange in a heat exchanger using hot water for hot water supply and bath in a hot water storage tank as a heat medium. Can be provided.
[Brief description of the drawings]
FIG. 1 is an overall system diagram of a heat pump hot water supply / room heating apparatus.
[Explanation of symbols]
A heat pump unit B tank unit C1 first hot water circuit C2 second hot water circuit C3 third hot water circuit C4 fourth hot water circuit C5 fifth hot water circuit P1, P3 first branch P2, P4 second branch R Refrigerant circuit 1 Floor heating panel (Hot water heater)
5 Water heat exchanger 11 Fan coil 13 Compressor 17 First expansion valve (pressure reducing device)
19 Second expansion valve (pressure reducing device)
Reference Signs List 20 Air heat exchanger 23 Hot water storage tank 28, 30 Open / close valve 29 Water heat exchanger 31 Circulation pump

Claims (3)

圧縮機、水冷媒熱交換器、減圧装置及び空気熱交換器を有する冷媒回路と、前記水冷媒熱交換器と貯湯タンクとの間で貯湯水を循環させる第１温水循環路と、第１水々熱交換器と貯湯タンクとの間で貯湯水を循環させる第２温水循環路と、第２水々熱交換器と貯湯タンクとの間で貯湯水を循環させる第３温水循環路と、前記第１水々熱交換器と温水暖房器との間で温水を循環させる第４温水循環路と、前記第２水々熱交換器と浴槽との間で追い焚きのために温水を循環させる第５温水循環路とを備えたことを特徴とするヒートポンプ式給湯暖房装置。A refrigerant circuit having a compressor, a water refrigerant heat exchanger, a pressure reducing device, and an air heat exchanger; a first hot water circuit for circulating hot water between the water refrigerant heat exchanger and the hot water storage tank; A second hot water circulation path for circulating hot water between the heat exchanger and the hot water storage tank, a third hot water circulation path for circulating hot water between the second water heat exchanger and the hot water storage tank, A fourth hot water circulation path for circulating hot water between the first water heat exchanger and the hot water heater, and a fourth water circulation circuit for circulating hot water for reheating between the second water heat exchanger and the bathtub. A heat pump hot water supply / room heating device comprising: a hot water circulation path. 前記第２温水循環路及び前記第３温水循環路内に温水を循環させる循環ポンプを共通のものを使用することを特徴とする請求項１に記載のヒートポンプ式給湯暖房装置。The heat pump hot water supply / room heating device according to claim 1, wherein a common circulation pump is used for circulating hot water in the second hot water circulation path and the third hot water circulation path. 前記圧縮機は能力調整が可能なものであることを特徴とする請求項１又は２に記載のヒートポンプ式給湯暖房装置。The heat pump hot water supply / room heating device according to claim 1 or 2, wherein the compressor is capable of adjusting its capacity.
JP2003022908A 2003-01-31 2003-01-31 Heat pump water heater / heater Expired - Fee Related JP3869804B2 (en)

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CN103244986A (en) * 2013-04-03 2013-08-14 哈尔滨工程大学 Sewage energy and biogas energy combined heat pump heating system
CN103868125A (en) * 2014-03-01 2014-06-18 双良节能系统股份有限公司 Supplementary-fired lithium bromide absorption type heat exchange system with two routes of water simultaneously supplying heat
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JP2007093097A (en) * 2005-09-28 2007-04-12 Mitsubishi Electric Corp Heat pump water heater and control method of the same
JP2009030849A (en) * 2007-07-26 2009-02-12 Corona Corp Heat pump hot-water storage type hot-water heating device
JP2009127938A (en) * 2007-11-22 2009-06-11 Hitachi Appliances Inc Heat pump water heater
JP2009236379A (en) * 2008-03-26 2009-10-15 Toshiba Carrier Corp Heat pump type hot water supply system
US9765977B2 (en) 2009-09-29 2017-09-19 Mitsubishi Electric Corporation Heat-accumulating hot-water-supplying air conditioner
CN102506534A (en) * 2011-09-21 2012-06-20 中国科学院理化技术研究所 Low-temperature frozen storage tank with primary segregation and separation regenerative mixed refrigerant throttling and refrigerating function
CN102506534B (en) * 2011-09-21 2013-09-11 中国科学院理化技术研究所 Low-temperature frozen storage tank with primary segregation and separation regenerative mixed refrigerant throttling and refrigerating function
CN103244986A (en) * 2013-04-03 2013-08-14 哈尔滨工程大学 Sewage energy and biogas energy combined heat pump heating system
CN103868125A (en) * 2014-03-01 2014-06-18 双良节能系统股份有限公司 Supplementary-fired lithium bromide absorption type heat exchange system with two routes of water simultaneously supplying heat
CN103868125B (en) * 2014-03-01 2016-03-16 双良节能系统股份有限公司 The band afterburning suction-type lithium bromide heat-exchange system of two path water heat supply simultaneously
CN104879818A (en) * 2015-04-24 2015-09-02 珠海格力电器股份有限公司 Heat exchange unit
CN104879818B (en) * 2015-04-24 2018-03-30 珠海格力电器股份有限公司 Heat-exchange unit

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