JP3869801B2 - Heat pump water heater / heater - Google Patents

Heat pump water heater / heater Download PDF

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Publication number
JP3869801B2
JP3869801B2 JP2003010496A JP2003010496A JP3869801B2 JP 3869801 B2 JP3869801 B2 JP 3869801B2 JP 2003010496 A JP2003010496 A JP 2003010496A JP 2003010496 A JP2003010496 A JP 2003010496A JP 3869801 B2 JP3869801 B2 JP 3869801B2
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hot water
heat exchanger
refrigerant
water
heating
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JP2004225926A (en
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浩二 南方
忠夫 岡田
清 小山
聡 星野
好夫 武藤
文明 佐藤
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Sanyo Electric Co Ltd
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Sanyo Electric 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

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。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】
また、ヒートポンプユニットの冷媒回路に給湯用の水冷媒熱交換器と暖房用の水冷媒熱交換器を組み込み、貯湯運転と温水暖房運転が行えるようにしたものが知られている（例えば、特許文献１参照）。
【０００４】
ところが、このものでは、温水暖房運転中に暖房負荷が少なくなると、温水循環路の戻り側の温水温度が高くなり、熱交換が十分に行われずに冷媒温度が高くなり、圧縮機の負荷が高くなる問題があり、圧縮機の保護のため運転を停止せざるを得なかった。そのため、ヒートポンプユニットを暖房用に使用する場合、暖房用温水循環路の戻り温度が高い場合には対応が困難となっていた。
【０００５】
【特許文献１】
特開２００２−２５７３６６号公報
【０００６】
【発明が解決しようとする課題】
そこで本発明は、貯湯運転や温水暖房運転が行えるようにしたものにおいて、給湯用の水冷媒熱交換器や暖房用の水冷媒熱交換器での放熱が十分行われなくとも、これとは別に熱交換器を設けることにより冷媒温度の低下を可能として、種々の暖房負荷に対応できるようにすることを目的とする。
【０００７】
【課題を解決するための手段】
このため本発明は、圧縮機、暖房用の温水を生成するための第1水冷媒熱交換器と貯湯タンクの貯湯水を生成するための第２水冷媒熱交換器との並列回路、内部熱交換器、減圧装置及び空気熱交換器とを順次環状に接続してなる冷媒回路と、前記第１水冷媒熱交換器と温水暖房器との間で温水を循環させる第１温水循環路と、前記第２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ことにより前記第２水冷媒熱交換器で前記冷媒回路の冷媒と熱交換して加熱された高温水を前記貯湯タンクに貯湯する第２温水循環路と、前記第１温水循環路による温水暖房運転中及び前記第２温水循環路による貯湯運転中に前記第1水冷媒熱交換器及び第２水冷媒熱交換器から流出した冷媒と更に前記空気熱交換器を経た冷媒との熱交換を前記内部熱交換器が行うように制御する制御手段とを備えたことを特徴とする。
【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、Ｃ１は温水暖房用の第1温水循環路、Ｃ２は貯湯用の第２温水循環路、ＲはヒートポンプユニットＡに内蔵された冷媒回路である。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及び２は第１温水循環路Ｃ１に設けられた床暖房パネル、３及び４は床暖房パネル１及び２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１温水循環路Ｃ１には、熱動弁５及び６、循環ポンプ７、膨張タンク８、第１水冷媒熱交換器９の水流路９Ｂ、バイパス管１０などが設けられている。
【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１１と、前記第１水冷媒熱交換器９の冷媒流路９Ａ、第２水冷媒熱交換器１２の一次流路１２Ａ、一端が前記冷媒流路９Ａに接続される第１開閉弁１３及び一端が一次流路１２Ａに接続される第２開閉弁１４と、第１及び第２開閉弁１３、１４が接続される内部熱交換器１５の一次流路１５Ａ、膨張弁（減圧装置）１６、空気熱交換器１７と、内部熱交換器１５の二次流路１５Ｂと、アキュムレーター１８とが順次環状に配管接続されている。
【００１４】
前記温水循環路Ｃ１には、第１水冷媒熱交換器９の水流路９Ｂから流出した暖房用温水の温度を検出するサーミスタ１９、流量調整弁２０、浴室暖房用のファンコイル２１が設けられている。２２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）、２３はファンコイルの２１の入口部に設けられた熱動弁、２４は循環ポンプ７によって膨張タンク８から流出した温水の一部を床暖房パネル１、２に供給するための熱動弁、２５は床暖房パネル１、２に流入する温水温度を検知するサーミスタである。
【００１５】
前記第２温水循環路Ｃ２は、第２水冷媒熱交換器１２の水流路１２Ｂと貯湯タンク２６とが循環ポンプ２７、流量調整弁２９を介して環状に接続されている。３０は第２水冷媒熱交換器１２の水流路１２Ｂから流出した温水温度を検知するサーミスタである。
【００１６】
前記貯湯タンク２６には水々熱交換器３１の一次流路３１Ａが循環ポンプ３２を介して接続されている。また、水々熱交換器３１の二次流路３１Ｂには循環ポンプ３３を介して浴槽３４が接続されている。３５は貯湯タンク２６の上部に接続された給湯管であり、この給湯管３５にはミキシングバルブ３６が設けられている。３８は給水管であり、この給水管３８は貯湯タンク２６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８に接続されている。
【００１７】
なお、部屋が暖まってくると、床暖房パネル１、２ではそれほど放熱されなくなり、膨張タンク８から水冷媒熱交換器９へは５０〜６０℃の高温水が供給されることとなるため、水冷媒熱交換器９ではそれほど熱交換されず、冷媒温度も高温となり、圧縮機１１に高負荷が掛かることとなる。そこで、高温となった冷媒の冷却機構として前記水冷媒熱交換器９の他に設けたのが前記内部熱交換器１５である。この内部熱交換器１５での放熱分は同じ冷媒回路Ｒ内の空気熱交換器１７を通過した後の冷媒に取込まれるので、冷媒回路Ｒの吸熱効率をも向上させている。
【００１８】
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３、４や浴室暖房用ファンコイル２１からの運転信号や温度信号と、サーミスタ１９、２５、３０の温度信号とに応じて、圧縮機１１の運転と周波数制御、循環ポンプ７、２７の運転制御、熱動弁５、６、２４、膨張弁１６の開度制御、流量調整弁２０、２９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。
【００１９】
〈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３の運転スイッチをオンにする。すると、これに対応した熱動弁５が開き、循環ポンプ７が運転し、第１温水循環路Ｃ１では、膨張タンク８→循環ポンプ７→第１水冷媒熱交換器９の水流路９Ｂ→流量調整弁２０→熱動弁５→床暖房パネル１→膨張タンク８の順に温水が流れる。なお、バイパス管１０は、熱動弁５が開くのに時間がかかり、また熱動弁５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。
【００２０】
また、前記床暖房リモコン３の運転スイッチをオンにした際に、ヒートポンプユニットＡの圧縮機１１が運転すると共に第１開閉弁１３が開き、冷媒回路Ｒでは、圧縮機１１→第１水冷媒熱交換器９の冷媒流路９Ａ→第１開閉弁１３→内部１５の一次流路１５Ａ→膨張弁１６→空気熱交換器１７→内部熱交換器１５の二次流路１５Ｂ→アキュムレーター１８→圧縮機１１の順に冷媒が流れる。このとき、貯湯は行われないので、第２開閉弁１４は閉じており、水冷媒熱交換器１２の一次流路１２Ａには冷媒は流れない。
【００２１】
前記床暖房パネル１に供給される温水の温度は６０〜７０℃であるが、サーミスタ１９が検知する温水温度がこの温度になるように圧縮機１１の周波数制御、膨張弁１６の弁開度制御及び流量調整弁２０の弁開度制御が行われる。
【００２２】
また、床暖房制御は、床暖房リモコン３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５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。
【００２３】
また、床暖房パネル２で同時に床暖房を行う場合、床暖房リモコン４の運転スイッチをオンにすることにより、同様に熱動弁６が開閉制御され、床暖房パネル１及び２に同時に温水が供給され、床暖房パネル１及び２への温水量を個別に制御することにより、床暖房の個別制御が可能となっている。
【００２４】
このような床暖房運転を行う場合、床暖房する部屋が暖まってくると、床暖房パネル１、２からの放熱量が小さくなり、膨張タンク８から水冷媒熱交換器９の水流路９Ｂへは５０〜６０℃の温水が供給されることとなる。このため、水冷媒熱交換器９ではそれほど熱交換されず、冷媒温度も高温となって圧縮機１１に負荷がかかる。このような場合の冷媒の冷却機構として設けたのが内部熱交換器１５であり、内部熱交換器１５の一次流路１５Ａでの放熱分は同じ冷媒回路Ｒにある内部熱交換器１５の二次流路１５Ｂで再度吸収されるため、無駄なく、効率を落とすことなく、冷媒回路Ｒを構成できる。
【００２５】
〈浴室暖房運転〉
ファンコイル２１による浴室の温風暖房を行う場合、浴室暖房リモコン２２をオンにする。すると、ファンコイル２１入口部の熱動弁２３が開き、循環ポンプ７が運転する。第１温水循環路Ｃ１では、膨張タンク８→循環ポンプ７→第１水冷媒熱交換器９の水流路９Ｂ→流量調整弁２０→熱動弁２３→ファンコイル２１→膨張タンク８の順に温水が流れる。バイパス管１０は、熱動弁２３が開くのに時間がかかり、また熱動弁２３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。
【００２６】
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、貯湯は行われないので、第２開閉弁１４は閉じており、水冷媒熱交換器１２の一次流路１２Ａには冷媒は流れない。
【００２７】
前記ファンコイル２１に供給される温水の温度は８０℃であるが、そのための温水制御は床暖房運転の場合と同様である。また、浴室暖房制御はファンコイル２１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２３を開閉制御することにより行われる。
【００２８】
〈床暖房と浴室暖房の同時運転〉
床暖房パネル１、２による床暖房と、ファンコイル２１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３、４、２２の運転スイッチをオンにする。すると、熱動弁５、６、２３が開き、循環ポンプ７が運転し、第１温水循環路Ｃ１では、膨張タンク８→循環ポンプ７→第１水冷媒熱交換器９の水流路９Ｂ→流量調整弁２０→熱動弁５、６→床暖房パネル１、２→膨張タンク８の順に温水が流れると共に、膨張タンク８→循環ポンプ７→第１水冷媒熱交換器９の水流路９Ｂ→流量調整弁２０→熱動弁２３→ファンコイル２１→膨張タンク８の順に温水が流れる。
【００２９】
バイパス管１０は、熱動弁５、６、２３が開くのに時間がかかり、また熱動弁５、６、２３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。
【００３０】
このときのサーミスタ１９による温水温度制御は８０℃であるが、これでは床暖房パネル１、２用の温水としては温度が高すぎることになる。これを解決するために、熱動弁２４を開くことで８０℃の温水に膨張タンク８からの中温水を混ぜ、サーミスタ２５にて検知される温水の温度が６０〜７０℃になるように制御している。また、中温水を混ぜすぎて低温になった場合は熱動弁２４を閉じ、サーミスタ２５の検知温度に基づく熱動弁２４の開閉制御を行う。
【００３１】
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又は浴室暖房運転と同様であり、貯湯は行われないので、第２開閉弁１４は閉じており、水冷媒熱交換器１２の一次流路１２Ａには冷媒は流れない。
【００３２】
〈貯湯運転〉
貯湯タンク２６に貯湯を行う場合、循環ポンプ２７が運転し、第２温水循環路Ｃ２では、貯湯タンク２６→循環ポンプ２７→第２水冷媒熱交換器１２の水流路１２Ｂ→流量調整弁２９→貯湯タンク２６の順に給湯用の温水が流れ、貯湯タンク２６に貯湯される。
【００３３】
ヒートポンプユニットＡでは圧縮機１１が運転すると共に第２開閉弁１４が開き、冷媒回路Ｒでは、圧縮機１１→第２水冷媒熱交換器１２の一次流路１２Ａ→内部熱交換器１５の一次流路１５Ａ→膨張弁１６→空気熱交換器１７→内部熱交換器１５の二次流路１５Ｂ→アキュムレーター１８→圧縮機１１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１３は閉じており、水冷媒熱交換器９の一次流路９Ａには冷媒は流れない。
【００３４】
従って、貯湯タンク２６への貯湯の際にも、第２水冷媒熱交換器１２から流出した冷媒と空気熱交換器１７から流出した冷媒との熱交換を前記内部熱交換器１５が行うものであるから、より高温の給水にも対応でき、貯湯タンク２６全体のより高温度の保温が可能となる。
【００３５】
貯湯タンク２６へ供給される温水温度は９０℃であるが、サーミスタ３０が検知する温度がこの温度になるように、圧縮機１１の周波数制御、膨張弁１６の弁開度制御、流量調整弁２９の弁開度制御が行われる。
【００３６】
貯湯タンク２６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２６に給水が行われる。また、循環ポンプ３２、３３を運転することにより、貯湯タンク２６の高温水と浴槽３４の温水を水々熱交換器３１で熱交換し、浴槽３４の温水の追い焚きを行うこともできる。
【００３７】
〈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と貯湯用の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及び第２開閉弁１３、１４が共に開き、圧縮機１１→第１水冷媒熱交換器９の冷媒流路９Ａ及び第２水冷媒熱交換器１２の一次流路１２Ａ→内部熱交換器１５の一次流路１５Ａ→膨張弁１６→空気熱交換器１７→内部熱交換器１５の二次流路１５Ｂ→アキュムレーター１８→圧縮機１１の順に冷媒が流れる。このとき、第１水冷媒熱交換器９、第２水冷媒熱交換器１２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。
【００３８】
また、サーミスタ１９、２５、３０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１１の周波数制御、膨張弁１６の弁開度制御、流量調整弁２０、２９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１１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。
【００３９】
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。
【００４０】
【発明の効果】
以上のように本発明は、貯湯運転や温水暖房運転が行えるようにしたものにおいて、給湯用の水冷媒熱交換器や暖房用の水冷媒熱交換器での放熱が十分行われなくとも、これとは別に熱交換器を設けることにより冷媒温度の低下を可能として、種々の暖房負荷に対応できる。
【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】
１、２ 床暖房パネル（温水暖房器）
９、１２ 水冷媒熱交換器
１１ 圧縮機
１５ 内部熱交換器
１６ 膨張弁（減圧装置）
１７ 空気熱交換器
２６ 貯湯タンク
Ｃ１ 第1温水循環路
Ｃ２ 第２温水循環路
Ｒ 冷媒回路
Ｓ１、Ｓ２ 制御装置（制御手段）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat pump hot water heater / heater using a refrigerant such as HFC or CO 2 .
[0002]
[Prior art]
This type of conventional heat pump type hot water heater / heater stores hot water obtained by heat exchange in the heat pump unit in a hot water storage tank, stores the hot water in the hot water storage tank, and uses the hot water in this tank for hot water supply and baths. What performs warm water heating using the warm water for heating obtained by heat-exchange with is known. In this case, when the heating load is large, hot water with sufficient temperature cannot be obtained.
[0003]
In addition, a water supply water heat exchanger and a heating water refrigerant heat exchanger for heating are incorporated in the refrigerant circuit of the heat pump unit so that hot water storage operation and hot water heating operation can be performed (for example, Patent Documents). 1).
[0004]
However, in this case, if the heating load decreases during the hot water heating operation, the hot water temperature on the return side of the hot water circulation path increases, the heat exchange is not performed sufficiently, the refrigerant temperature increases, and the compressor load increases. Because of this problem, the operation had to be stopped to protect the compressor. Therefore, when the heat pump unit is used for heating, it has been difficult to cope with the case where the return temperature of the heating hot water circulation path is high.
[0005]
[Patent Document 1]
JP 2002-257366 A [0006]
[Problems to be solved by the invention]
Therefore, the present invention is configured so that hot water storage operation and hot water heating operation can be performed, and even if heat is not sufficiently dissipated in the water refrigerant heat exchanger for hot water supply and the water refrigerant heat exchanger for heating, An object of the present invention is to provide a heat exchanger so that the temperature of the refrigerant can be lowered to cope with various heating loads.
[0007]
[Means for Solving the Problems]
Therefore the present invention includes a compressor, a parallel circuit of a second water-refrigerant heat exchanger for producing hot water of the first water-refrigerant heat exchanger and the hot water storage tank for producing hot water for heating, the internal heat A refrigerant circuit in which an exchanger, a decompression device and an air heat exchanger are sequentially connected in an annular manner; a first hot water circulation path for circulating hot water between the first water refrigerant heat exchanger and the hot water heater; By circulating hot water between the second water refrigerant heat exchanger and the hot water storage tank, the hot water stored in the hot water tank is heated by exchanging heat with the refrigerant in the refrigerant circuit in the second water refrigerant heat exchanger. A second hot water circulation path for storing hot water, and a hot water heating operation by the first hot water circulation path and a hot water storage operation by the second hot water circulation path from the first water refrigerant heat exchanger and the second water refrigerant heat exchanger. the heat exchange with the effluent refrigerant further passed through the air heat exchanger and the refrigerant internal heat Characterized in that a control means for controlling such exchanger is performed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a system diagram showing an overall system of a heat pump hot water supply / room heating system. In FIG. 1, A is a heat pump unit, B is a tank unit, C1 is a first hot water circulation path for hot water heating, C2 is a second hot water circulation path for hot water storage, and R is a refrigerant circuit built in the heat pump unit A. . Although a refrigerant such as HFC or CO 2 can be used, CO 2 is used in this embodiment.
[0012]
1 and 2 are floor heating panels provided in the first hot water circulation path C1, and 3 and 4 are floor heating remote controllers (hereinafter referred to as "floor heating remote controllers") provided corresponding to the floor heating panels 1 and 2. The first hot water circulation path C1 is provided with thermal valves 5 and 6, a circulation pump 7, an expansion tank 8, a water flow path 9B of the first water refrigerant heat exchanger 9, a bypass pipe 10, and the like.
[0013]
The refrigerant circuit R includes a two-stage compression compressor 11 capable of adjusting the capacity using CO 2 refrigerant, a refrigerant flow path 9A of the first water refrigerant heat exchanger 9, and a second water refrigerant heat exchanger 12. Primary flow path 12A, first open / close valve 13 having one end connected to the refrigerant flow path 9A, second open / close valve 14 having one end connected to the primary flow path 12A, and first and second open / close valves 13, 14 The primary flow path 15A of the internal heat exchanger 15, the expansion valve (decompression device) 16, the air heat exchanger 17, the secondary flow path 15B of the internal heat exchanger 15, and the accumulator 18 are sequentially annular. Connected to the pipe.
[0014]
The warm water circulation path C1 is provided with a thermistor 19 for detecting the temperature of warm water for heating flowing out from the water flow path 9B of the first water refrigerant heat exchanger 9, a flow rate adjusting valve 20, and a fan coil 21 for bathroom heating. Yes. 22 is a bathroom heating remote controller (hereinafter referred to as “bathroom heating remote controller”), 23 is a thermal valve provided at the inlet of the fan coil 21, and 24 is a part of hot water flowing out of the expansion tank 8 by the circulation pump 7. , 25 is a thermistor for detecting the temperature of hot water flowing into the floor heating panels 1 and 2.
[0015]
In the second hot water circulation path C <b> 2, the water flow path 12 </ b> B of the second water refrigerant heat exchanger 12 and the hot water storage tank 26 are annularly connected via a circulation pump 27 and a flow rate adjustment valve 29. Reference numeral 30 denotes a thermistor that detects the temperature of hot water flowing out from the water flow path 12B of the second water refrigerant heat exchanger 12.
[0016]
A primary flow path 31 </ b> A of the water heat exchanger 31 is connected to the hot water storage tank 26 via a circulation pump 32. A bathtub 34 is connected to the secondary flow path 31 </ b> B of the water heat exchanger 31 via a circulation pump 33. A hot water supply pipe 35 is connected to the upper part of the hot water storage tank 26, and a mixing valve 36 is provided in the hot water supply pipe 35. A water supply pipe 38 is branched and connected to the lower part of the hot water storage tank 26 and the mixing valve 36, and is further connected to the expansion tank 8 via an on-off valve 39.
[0017]
When the room is warmed up, the floor heating panels 1 and 2 are not radiated so much, and high-temperature water of 50 to 60 ° C. is supplied from the expansion tank 8 to the water-refrigerant heat exchanger 9. The refrigerant heat exchanger 9 does not exchange much heat, the refrigerant temperature becomes high, and the compressor 11 is heavily loaded. Therefore, the internal heat exchanger 15 is provided in addition to the water-refrigerant heat exchanger 9 as a cooling mechanism for the refrigerant having reached a high temperature. Since the heat radiation in the internal heat exchanger 15 is taken into the refrigerant after passing through the air heat exchanger 17 in the same refrigerant circuit R, the heat absorption efficiency of the refrigerant circuit R is also improved.
[0018]
The heat pump unit A and the tank unit B are provided with control devices (control means) S1 and S2 each composed of a microcomputer. The control devices S1 and S2 operate the compressor 11 according to the operation signals and temperature signals from the floor heating remote controllers 3 and 4 and the fan coil 21 for bathroom heating, and the temperature signals from the thermistors 19, 25 and 30. Control, operation control of the circulation pumps 7 and 27, thermal control valves 5, 6, and 24, opening control of the expansion valve 16, opening control of the flow rate adjusting valves 20 and 29, and the like. To do.
[0019]
<Floor heating operation>
When performing floor heating by the floor heating panel 1, the operation switch of the floor heating remote controller 3 attached to the wall surface of the room is turned on. Then, the corresponding thermal valve 5 is opened and the circulation pump 7 is operated. In the first hot water circulation path C1, the expansion tank 8 → the circulation pump 7 → the water flow path 9B of the first water refrigerant heat exchanger 9 → the flow rate. Hot water flows in the order of the regulating valve 20 → the thermal valve 5 → the floor heating panel 1 → the expansion tank 8. It should be noted that the bypass pipe 10 bypasses a part of the hot water so that it takes time to open the thermal valve 5 and can cope with the case where the thermal valve 5 is broken. Hot water flows.
[0020]
When the operation switch of the floor heating remote controller 3 is turned on, the compressor 11 of the heat pump unit A is operated and the first on-off valve 13 is opened. In the refrigerant circuit R, the compressor 11 → the first water refrigerant heat. Refrigerant flow path 9A of exchanger 9 → first on-off valve 13 → primary flow path 15A of internal 15 → expansion valve 16 → air heat exchanger 17 → secondary flow path 15B of internal heat exchanger 15 → accumulator 18 → compression The refrigerant flows in the order of the machine 11. At this time, since hot water is not stored, the second on-off valve 14 is closed, and the refrigerant does not flow into the primary flow path 12A of the water-refrigerant heat exchanger 12.
[0021]
The temperature of the hot water supplied to the floor heating panel 1 is 60 to 70 ° C., but the frequency control of the compressor 11 and the valve opening control of the expansion valve 16 are performed so that the hot water temperature detected by the thermistor 19 becomes this temperature. And the valve opening degree control of the flow regulating valve 20 is performed.
[0022]
Further, in the floor heating control, a room temperature thermistor (not shown) mounted on the floor heating remote controller 3 detects the room temperature, and controls the opening and closing of the thermal valve 5 based on the deviation between the set temperature and the room temperature. This is done by controlling the amount of hot water to the water.
[0023]
When floor heating is simultaneously performed by the floor heating panel 2, the operation valve of the floor heating remote controller 4 is turned on to similarly control the opening and closing of the thermal valve 6 so that hot water is simultaneously supplied to the floor heating panels 1 and 2. In addition, by individually controlling the amount of hot water to the floor heating panels 1 and 2, it is possible to individually control the floor heating.
[0024]
When such a floor heating operation is performed, when the floor heating room is warmed, the amount of heat released from the floor heating panels 1 and 2 is reduced, and the expansion tank 8 to the water flow path 9B of the water refrigerant heat exchanger 9 50-60 degreeC warm water will be supplied. For this reason, the water / refrigerant heat exchanger 9 does not exchange much heat, the refrigerant temperature becomes high, and the compressor 11 is loaded. The internal heat exchanger 15 is provided as a cooling mechanism for the refrigerant in such a case, and the heat radiation in the primary flow path 15A of the internal heat exchanger 15 is two of the internal heat exchanger 15 in the same refrigerant circuit R. Since it is absorbed again by the next flow path 15B, the refrigerant circuit R can be configured without waste and without reducing efficiency.
[0025]
<Bathroom heating operation>
When performing hot air heating of the bathroom by the fan coil 21, the bathroom heating remote controller 22 is turned on. Then, the thermal valve 23 at the inlet of the fan coil 21 is opened, and the circulation pump 7 is operated. In the first hot water circulation path C1, the hot water flows in the order of the expansion tank 8 → the circulation pump 7 → the water flow path 9B of the first water refrigerant heat exchanger 9 → the flow rate adjusting valve 20 → the thermal valve 23 → the fan coil 21 → the expansion tank 8. Flowing. The bypass pipe 10 bypasses a part of the hot water so that it takes time for the thermal valve 23 to open and the thermal valve 23 is out of order. Flowing.
[0026]
The operation of the heat pump unit A and the refrigerant circulation are the same as in the floor heating operation, and hot water is not stored. Therefore, the second on-off valve 14 is closed, and the refrigerant flows into the primary flow path 12A of the water refrigerant heat exchanger 12. Absent.
[0027]
The temperature of the hot water supplied to the fan coil 21 is 80 ° C., and the hot water control for that is the same as in the floor heating operation. The bathroom heating control is performed by detecting the room temperature with a room temperature thermistor (not shown) mounted on the fan coil 21, controlling the fan rotation speed, and controlling the opening and closing of the thermal valve 23.
[0028]
<Simultaneous operation of floor heating and bathroom heating>
When floor heating by the floor heating panels 1 and 2 and bath room temperature heating by the fan coil 21 are performed simultaneously, the operation switches of the respective remote controllers 3, 4 and 22 are turned on. Then, the thermal valves 5, 6 and 23 are opened, and the circulation pump 7 is operated. In the first hot water circulation path C1, the expansion tank 8 → the circulation pump 7 → the water flow path 9B of the first water refrigerant heat exchanger 9 → the flow rate. While the warm water flows in the order of the regulating valve 20 → the thermal valves 5, 6 → the floor heating panels 1, 2 → the expansion tank 8, the expansion tank 8 → the circulation pump 7 → the water flow path 9B of the first water refrigerant heat exchanger 9 → the flow rate. Hot water flows in the order of the regulating valve 20 → the thermal valve 23 → the fan coil 21 → the expansion tank 8.
[0029]
The bypass pipe 10 bypasses a part of the hot water so that it takes time to open the thermal valves 5, 6, 23, and can cope with the case where the thermal valves 5, 6, 23 are out of order. A small amount of warm water flows.
[0030]
Although the hot water temperature control by the thermistor 19 at this time is 80 ° C., this is too high as hot water for the floor heating panels 1 and 2. In order to solve this problem, the thermal valve 24 is opened to mix the warm water from the expansion tank 8 with the warm water at 80 ° C., and the temperature of the warm water detected by the thermistor 25 is controlled to 60 to 70 ° C. is doing. Further, when the temperature of the medium temperature water is excessively mixed and the temperature becomes low, the heat valve 24 is closed and the opening / closing control of the heat valve 24 based on the temperature detected by the thermistor 25 is performed.
[0031]
The operation of the heat pump unit A and the refrigerant circulation are the same as the floor heating operation or the bathroom heating operation, and no hot water is stored. Therefore, the second on-off valve 14 is closed, and the water refrigerant heat exchanger 12 is connected to the primary flow path 12A. Does not flow refrigerant.
[0032]
<Hot water storage operation>
When hot water is stored in the hot water storage tank 26, the circulation pump 27 is operated. In the second hot water circulation path C2, the hot water storage tank 26 → the circulation pump 27 → the water flow path 12B of the second water refrigerant heat exchanger 12 → the flow rate adjusting valve 29 → Hot water for hot water supply flows in the order of the hot water storage tank 26 and is stored in the hot water storage tank 26.
[0033]
In the heat pump unit A, the compressor 11 is operated and the second on-off valve 14 is opened. In the refrigerant circuit R, the primary flow 12A of the compressor 11 → the second water refrigerant heat exchanger 12 → the primary flow of the internal heat exchanger 15 The refrigerant flows in the order of the passage 15A → the expansion valve 16 → the air heat exchanger 17 → the secondary flow path 15B of the internal heat exchanger 15 → the accumulator 18 → the compressor 11. At this time, since heating is not performed, the first on-off valve 13 is closed, and the refrigerant does not flow into the primary flow path 9A of the water-refrigerant heat exchanger 9.
[0034]
Therefore, when the hot water is stored in the hot water storage tank 26, the internal heat exchanger 15 performs heat exchange between the refrigerant flowing out of the second water refrigerant heat exchanger 12 and the refrigerant flowing out of the air heat exchanger 17. Therefore, it is possible to cope with hot water supply, and the hot water storage tank 26 as a whole can be kept warm.
[0035]
The temperature of the hot water supplied to the hot water storage tank 26 is 90 ° C., so that the temperature detected by the thermistor 30 becomes this temperature, the frequency control of the compressor 11, the valve opening control of the expansion valve 16, and the flow rate adjustment valve 29. The valve opening degree control is performed.
[0036]
The hot water stored in the hot water storage tank 26 is adjusted to an appropriate temperature by the mixing valve 36 and used for hot water supply from the hot water supply pipe 35 to the kitchen or shower, hot water filling to the bathtub 34, and the like. When hot water is supplied, water is supplied from the water supply pipe 38 to the hot water storage tank 26. In addition, by operating the circulation pumps 32 and 33, the hot water in the hot water storage tank 26 and the hot water in the bathtub 34 can be heat-exchanged by the water heat exchanger 31, and the hot water in the bathtub 34 can be replenished.
[0037]
<Simultaneous operation of heating and hot water storage>
In this case, the circulation path of the hot water for heating and the circulation path of the hot water for hot water storage are as described above. In the refrigerant circuit R, the first and second on-off valves 13 and 14 are both opened, and the compressor 11 → the refrigerant flow path 9A of the first water refrigerant heat exchanger 9 and the primary flow path 12A of the second water refrigerant heat exchanger 12 are opened. → Primary flow path 15A of the internal heat exchanger 15 → Expansion valve 16 → Air heat exchanger 17 → Secondary flow path 15B of the internal heat exchanger 15 → Accumulator 18 → Compressor 11 flows in this order. At this time, it goes without saying that heat exchange is performed in the first water refrigerant heat exchanger 9, the second water refrigerant heat exchanger 12, and the internal heat exchanger 15.
[0038]
Further, frequency control of the compressor 11, valve opening control of the expansion valve 16, and valve opening control of the flow rate adjusting valves 20 and 29 are performed so that the thermistors 19, 25, and 30 each have the target temperature described above. When the simultaneous operation is performed, the compressor 11 is operated at the maximum capacity so that sufficient capacity can be obtained on the heating side and the hot water storage side.
[0039]
Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the various alternatives and modifications described above are within the scope of the present invention. Or a modification is included.
[0040]
【The invention's effect】
As described above, the present invention can perform hot water storage operation and hot water heating operation. Even if heat is not sufficiently dissipated in the water refrigerant heat exchanger for hot water supply or the water refrigerant heat exchanger for heating, Apart from that, by providing a heat exchanger, the refrigerant temperature can be lowered, and various heating loads can be accommodated.
[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]
1, 2 Floor heating panel (hot water heater)
9, 12 Water refrigerant heat exchanger 11 Compressor 15 Internal heat exchanger 16 Expansion valve (pressure reduction device)
17 Air heat exchanger 26 Hot water storage tank C1 1st warm water circulation path C2 2nd warm water circulation path R Refrigerant circuit S1, S2 Control device (control means)

Claims (1)

圧縮機、暖房用の温水を生成するための第1水冷媒熱交換器と貯湯タンクの貯湯水を生成するための第２水冷媒熱交換器との並列回路、内部熱交換器、減圧装置及び空気熱交換器とを順次環状に接続してなる冷媒回路と、前記第１水冷媒熱交換器と温水暖房器との間で温水を循環させる第１温水循環路と、前記第２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ことにより前記第２水冷媒熱交換器で前記冷媒回路の冷媒と熱交換して加熱された高温水を前記貯湯タンクに貯湯する第２温水循環路と、前記第１温水循環路による温水暖房運転中及び前記第２温水循環路による貯湯運転中に前記第1水冷媒熱交換器及び第２水冷媒熱交換器から流出した冷媒と更に前記空気熱交換器を経た冷媒との熱交換を前記内部熱交換器が行うように制御する制御手段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。Compressor, a parallel circuit of a second water-refrigerant heat exchanger for producing hot water of the first water-refrigerant heat exchanger and the hot water storage tank for producing hot water for heating, the internal heat exchanger, pressure reducing device and A refrigerant circuit formed by sequentially connecting an air heat exchanger in an annular shape, a first hot water circulation path for circulating hot water between the first water refrigerant heat exchanger and the hot water heater, and the second water refrigerant heat Second hot water for storing hot water in the hot water storage tank by storing hot water heated by exchanging heat with the refrigerant in the refrigerant circuit in the second water refrigerant heat exchanger by circulating hot water between the exchanger and the hot water storage tank further, the circulation passage, and refrigerant flowing out from the hot water heating operation and in the second hot-water circulation path by the first coolant-refrigerant heat exchanger in the hot water storage operation and the second coolant-refrigerant heat exchanger according to the first water circulation pipe heat exchange with the refrigerant which has flowed through the air heat exchanger so that the internal heat exchanger performs Heat pump water heater heating system, characterized in that a Gosuru control means.
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CN107166508B (en) * 2017-06-21 2020-07-21 海信（山东）空调有限公司 Heat pump type floor heating machine control method and heat pump type floor heating machine

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