JP3869798B2

JP3869798B2 - Heat pump water heater / heater

Info

Publication number: JP3869798B2
Application number: JP2003005942A
Authority: JP
Inventors: 浩二南方; 忠夫岡田; 清小山; 聡星野; 好夫武藤; 文明佐藤
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2003-01-14
Filing date: 2003-01-14
Publication date: 2007-01-17
Anticipated expiration: 2023-01-14
Also published as: JP2004218910A

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直列に組み込み、給湯用の温水と暖房用の温水とが得られ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、温水暖房を行っているときは高温水の貯湯ができなくなるため、高温水の貯湯と温水暖房のいずれかを優先させたり、交互に行うなどしなければならず、使い勝手の面で問題があった。
【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、高温水の貯湯と温水暖房とが同時に行う場合や、どちらか一方を行う場合のいずれにも対応できるようにし、使い勝手の良い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。
【０００７】
【課題を解決するための手段】
このため第１の発明は、能力調整可能な圧縮機と、暖房用の温水を生成するための第１水冷媒熱交換器、第１開閉弁及び第１減圧装置よりなる第１分岐路と第２水冷媒熱交換器、第２開閉弁及び第２減圧装置よりなる第２分岐路との並列回路と、空気熱交換器とを順次環状に接続して冷媒回路を形成すると共に、前記第１水冷媒熱交換器と床暖房パネル等の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温水循環路とを備え、前記第１開閉弁及び第２開閉弁の開閉に応じて、前記第１温水循環路内に温水を循環させることによる暖房のみ、前記第２温水循環路内に温水を循環させることによる前記貯湯タンクへの貯湯のみ、または前記暖房と貯湯の両者が行えることを特徴とする。
【０００８】
第２の発明は、第１の発明のヒートポンプ式給湯暖房装置において、前記冷媒回路の第１分岐路の第１水冷媒熱交換器から流出した冷媒と前記空気熱交換器から流出した冷媒との熱交換を行う熱交換器を備えたことを特徴とする。
【０００９】
【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は前記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。
【００１０】
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は前記床暖房パネル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。
【００１１】
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、第１水冷媒熱交換器９の冷媒流路９Ａ、内部熱交換器１２の一次流路１２Ａ、第１開閉弁１３及び第１膨張弁（減圧装置）１４よりなる第１分岐路Ｐ１と第２水冷媒熱交換器１５の冷媒流路１５Ａ、第２開閉弁１６及び第２膨張弁（減圧装置）１７よりなる第２分岐路Ｐ２との並列回路と、空気熱交換器１８と、内部熱交換器１２の二次流路１２Ｂと、アキュムレーター１９とが順次環状に配管接続されている。
【００１２】
前記第１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２０、流量調整弁２１、浴室暖房用のファンコイル２２が設けられている。２３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）、２４はファンコイル２２の入口部に設けられた熱動弁、２５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、２６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。
【００１３】
前記第２温水循環路Ｃ２は、第２水冷媒熱交換器１５の水流路１５Ｂと貯湯タンク２７とが循環ポンプ２８、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１５の水流路１５Ｂから流出した温水温度を検知するサーミスタである。
【００１４】
前記貯湯タンク２７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２７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２７の下部と前記ミキシングバルブ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。
【００１５】
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等から成る制御装置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や浴室暖房用のファンコイル２２からの運転信号や温度信号と、サーミスタ２０、２６、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、２８の運転制御、熱動弁５、６、２５、開閉弁１３、１６の開閉制御、膨張弁１４、１７の開度制御、流量調整弁２１、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。
【００１６】
〈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２１→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。
【００１７】
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が運転し、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→内部熱交換器１２の一次流路１２Ａ→第１開閉弁１３→第１膨張弁１４→空気熱交換器１８→内部熱交換器１２のニ次流路１２Ｂ→アキュムレーター１９→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１６及び第２膨張弁１７は閉じている。
【００１８】
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２０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、第１膨張弁１４の弁開度制御及び流量調整弁２１の弁開度制御が行われる。
【００１９】
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。
【００２０】
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。
【００２１】
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１２であり、内部熱交換器１２の一次流路１２Ａでの放熱分は同じ冷媒回路Ｒにある内部熱交換器１２の二次流路１２Ｂ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。
【００２２】
〈浴室暖房運転〉
ファンコイル２２による浴室暖房を行う場合、浴室暖房リモコン２３をオンにする。すると、ファンコイル２２入口部の熱動弁２４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２１→熱動弁２４→ファンコイル２２→膨張タンク８の順に温水が流れる。バイパス管１０は、前記熱動弁２４が開くのに時間がかかり、また熱動弁２４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】
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１６及び第２膨張弁１７は閉じている。
【００２４】
前記ファンコイル２２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２２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２４を開閉制御することにより行われる。
【００２５】
〈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２２による浴室暖房を同時に行う場合、それぞれのリモコン３、４、２３の運転スイッチをオンにする。すると、熱動弁５、６、２４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２１→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２１→熱動弁２４→ファンコイル２２→膨張タンク８の順に温水が流れる。
【００２６】
バイパス管１０は、前記熱動弁５、６、２４が開くのに時間がかかり、また、熱動弁５、６、２４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。
【００２７】
このときのサーミスタ２０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２５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２６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２５を閉じ、サーミスタ２６の検知温度に基づく熱動弁２５の開閉制御を行う。
【００２８】
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１６及び第２膨張弁１７は閉じている。
【００２９】
〈貯湯運転〉
貯湯タンク２７に貯湯を行う場合、循環ポンプ２８が運転し、第２温水循環路Ｃ２では、貯湯タンク２７→循環ポンプ２８→第２水冷媒熱交換器１５の水流路１５Ｂ→流量調整弁２９→貯湯タンク２７の順に給湯用の温水が流れ、貯湯タンク２７に貯湯される。
【００３０】
ヒートポンプユニットＡでは圧縮機１１が運転し、冷媒回路Ｒでは、圧縮機１１→第２水冷媒熱交換器１５の冷媒流路１５Ａ→第２開閉弁１６→第２膨張弁１７→空気熱交換器１８→内部熱交換器１２のニ次流路１２Ｂ→アキュムレーター１９→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及び第１膨張弁１４は閉じている。また、内部熱交換器１２の二次流路１２Ｂ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。
【００３１】
貯湯タンク２７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、第２膨張弁１７の弁開度制御、流量調整弁２９の弁開度制御が行われる。
【００３２】
貯湯タンク２７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２７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２７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。
【００３３】
＜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、圧縮機１１→第１水冷媒熱交換器９の冷媒流路９Ａ→内部熱交換器１２の一次流路１２Ａ→第１開閉弁１３→第１膨張弁１４→空気熱交換器１８→内部熱交換器１２の二次流路１２Ｂ→アキュムレーター１９→圧縮機１１の順に冷媒が流れると共に、圧縮機１１→第２水冷媒熱交換器１５の冷媒流路１５Ａ→第２開閉弁１６→第２膨張弁１７→空気熱交換器１８→内部熱交換器１２の二次流路１２Ｂ→アキュムレーター１９→圧縮機１１の順に冷媒が流れる。
【００３４】
また、サーミスタ２０、２６、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、第１膨張弁１４及び第２膨張弁１７の弁開度制御、流量調整弁２１、２９の弁開度制御が行われる。基本的には、膨張弁１４、１７の制御により、第１分岐路（暖房側）Ｐ１と第２分岐路Ｐ２（貯湯側）とに１：１の割合で冷媒を配分し、同時運転が行われた場合でも、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。
【００３５】
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。
【００３６】
【発明の効果】
以上のように本発明は、能力調整可能な圧縮機と、暖房用の温水を生成するための第１水冷媒熱交換器、第１開閉弁及び第１減圧装置よりなる第１分岐路と第２水冷媒熱交換器、第２開閉弁及び第２減圧装置よりなる第２分岐路との並列回路と、空気熱交換器とを順次環状に接続して冷媒回路を形成すると共に、前記第１水冷媒熱交換器と床暖房パネル等の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温水循環路とを備え、前記第１開閉弁及び第２開閉弁の開閉に応じて前記第１温水循環路内に温水を循環させることによる暖房のみ、前記第２温水循環路内に温水を循環させることによる前記貯湯タンクへの貯湯のみ、または前記暖房と貯湯の両者が行えるようにしたから、高温水の貯湯と温水暖房とを同時に行う場合や、どちらか一方を行う場合のいずれにも対応して必要な能力を発揮することができ、使い勝手の良いヒートポンプ式給湯暖房装置を提供できるものである。
【００３７】
また、冷媒回路の第１分岐路の第１水冷媒熱交換器から流出した冷媒と空気熱交換器から流出した冷媒との熱交換を行う熱交換器を備えているので、温水暖房を行う場合で、かつ、暖房負荷が小さい場合でも、圧縮機に大きな負荷がかからないようにでき、信頼性が高い。
【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、１５水冷媒熱交換器
１１圧縮機
１２内部熱交換器
１３第１開閉弁
１６第２開閉弁
１４第１膨張弁（減圧装置）
１７第２膨張弁（減圧装置）
２２ファンコイル
２７貯湯タンク
Ｃ１第１温水循環路
Ｃ２第２温水循環路
１８空気熱交換器
Ｐ１第１分岐路
Ｐ２第２分岐路
Ｒ冷媒回路[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat pump hot water supply and heating device 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]
Also, a water supply heat exchanger for hot water supply and a water refrigerant heat exchanger for heating are incorporated in series in the refrigerant circuit of the heat pump unit so that hot water for hot water supply and hot water for heating can be obtained. (For example, refer to Patent Document 1).
[0004]
However, with this system, hot water cannot be stored during hot water heating, so either hot water storage or hot water heating must be prioritized or performed alternately. There was a problem in terms.
[0005]
[Patent Document 1]
JP 2002-257366 A [0006]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide an easy-to-use heat pump hot water supply and heating device that can handle both cases where hot water storage and hot water heating are performed simultaneously or when either one is performed. .
[0007]
[Means for Solving the Problems]
For this reason, the first invention provides a first branch passage comprising a compressor with adjustable capacity, a first water refrigerant heat exchanger for generating hot water for heating, a first on-off valve, and a first pressure reducing device, and a first branch passage. A parallel circuit with a second branch path composed of a two-water refrigerant heat exchanger, a second on-off valve and a second pressure reducing device and an air heat exchanger are sequentially connected in an annular manner to form a refrigerant circuit, and the first Circulating hot water between a first hot water circulation path for circulating hot water between a water refrigerant heat exchanger and a hot water heater such as a floor heating panel, and the second water refrigerant heat exchanger and a hot water storage tank; the refrigerant exchanges heat with the hot water heated by the refrigerant circuit in the second coolant-refrigerant heat exchanger and a second water circulation pipe for hot water storage in the hot water storage tank, the first on-off valve and the second on-off by Only heating by circulating hot water in the first hot water circulation path according to opening and closing of the valve, Only hot water storage to the hot water storage tank by circulating hot water through the second hot-water circulation path, or wherein the perform both heating and hot-water is.
[0008]
According to a second aspect of the present invention, in the heat pump hot water supply and heating device of the first aspect, the refrigerant flowing out of the first water refrigerant heat exchanger in the first branch of the refrigerant circuit and the refrigerant flowing out of the air heat exchanger A heat exchanger for performing heat exchange is provided.
[0009]
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. is there. Although a refrigerant such as HFC or CO ₂ can be used, CO ₂ is used in this embodiment.
[0010]
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 provided corresponding to the floor heating panels 1 and 2 (hereinafter referred to as "floor heating remote controller"). 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. .
[0011]
The refrigerant circuit R includes a two-stage compression compressor 11 capable of capacity adjustment using CO ₂ refrigerant, a refrigerant flow path 9A of the first water refrigerant heat exchanger 9, and a primary flow path of the internal heat exchanger 12. 12A, the first branch P1 composed of the first on-off valve 13 and the first expansion valve (decompression device) 14, the refrigerant passage 15A of the second water refrigerant heat exchanger 15, the second on-off valve 16 and the second expansion valve ( A parallel circuit with the second branch path P2 composed of the decompression device 17, the air heat exchanger 18, the secondary flow path 12 B of the internal heat exchanger 12, and the accumulator 19 are sequentially piped in an annular manner. .
[0012]
The first hot water circulation path C1 is provided with a thermistor 20, a flow rate adjusting valve 21, and a fan coil 22 for bathroom heating that detect the temperature of warm water for heating that has flowed out of the water flow path 9B of the first water refrigerant heat exchanger 9. It has been. Reference numeral 23 is a bathroom heating remote controller (hereinafter referred to as “bathroom heating remote controller”), 24 is a thermal valve provided at the inlet of the fan coil 22, and 25 is a part of hot water flowing out from the expansion tank 8 by the circulation pump 7. A thermal valve 26 for supplying the floor heating panels 1 and 2 is a thermistor 26 that detects the temperature of hot water flowing into the floor heating panels 1 and 2.
[0013]
In the second hot water circulation path C 2, the water flow path 15 B of the second water refrigerant heat exchanger 15 and the hot water storage tank 27 are annularly connected via a circulation pump 28 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 15B of the second water refrigerant heat exchanger 15.
[0014]
A primary flow path 31 A of the water heat exchanger 31 is connected to the hot water storage tank 27 via a circulation pump 32. A bathtub 34 is connected to the secondary flow path 31 B of the water heat exchanger 31 via a circulation pump 33. A hot water supply pipe 35 is connected to the upper portion of the hot water storage tank 27, 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 27 and the mixing valve 36, and is further connected to the expansion tank 8 via an on-off valve 39.
[0015]
Further, the heat pump unit A and the tank unit B are provided with control devices S1 and S2 each composed of a microcomputer or the like. 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 22 for bathroom heating, and the temperature signals from the thermistors 20, 26 and 30. Frequency control, operation control of circulation pumps 7 and 28, thermal valves 5, 6, 25, on / off control of on-off valves 13 and 16, opening control of expansion valves 14 and 17, opening control of flow rate adjusting valves 21 and 29 The operation will be described below.
[0016]
<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 21 → 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.
[0017]
Further, 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 in the refrigerant circuit R, the refrigerant flow path 9A of the compressor 11 → the first water refrigerant heat exchanger 9 is operated. → the primary flow path 12A of the internal heat exchanger 12 → the first on-off valve 13 → the first expansion valve 14 → the air heat exchanger 18 → the secondary flow path 12B of the internal heat exchanger 12 → the accumulator 19 → the compressor 11 The refrigerant flows in order. At this time, since hot water is not stored, the second on-off valve 16 and the second expansion valve 17 are closed.
[0018]
The temperature of the hot water supplied to the floor heating panel 1 is 60 to 70 ° C. The frequency control of the compressor 11 and the opening of the first expansion valve 14 are performed so that the hot water temperature detected by the thermistor 20 becomes this temperature. Degree control and valve opening degree control of the flow rate adjusting valve 21 are performed.
[0019]
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.
[0020]
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.
[0021]
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 12 is provided as a cooling mechanism for the refrigerant in such a case, and the heat radiation in the primary flow path 12A of the internal heat exchanger 12 is two of the internal heat exchanger 12 in the same refrigerant circuit R. Since it is absorbed again by the next flow path 12B, the refrigerant circuit R can be configured without waste and without reducing the efficiency.
[0022]
<Bathroom heating operation>
When bathroom heating by the fan coil 22 is performed, the bathroom heating remote controller 23 is turned on. Then, the thermal valve 24 at the inlet of the fan coil 22 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 → circulation pump 7 → water flow path 9B of the first water refrigerant heat exchanger 9 → flow rate adjusting valve 21 → thermal valve 24 → fan coil 22 → expansion tank 8. Flowing. The bypass pipe 10 bypasses a part of hot water so that it takes time to open the thermal valve 24 and can cope with the case where the thermal valve 24 is broken. Flows.
[0023]
The operation of the heat pump unit A and the refrigerant circulation are the same as in the floor heating operation, and no hot water is stored, so the second on-off valve 16 and the second expansion valve 17 are closed.
[0024]
The temperature of the hot water supplied to the fan coil 22 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 22, controlling the fan rotation speed, and opening / closing the thermal valve 24.
[0025]
<Simultaneous operation of floor heating and bathroom heating>
When floor heating by the floor heating panels 1 and 2 and bathroom heating by the fan coil 22 are performed simultaneously, the operation switches of the respective remote controllers 3, 4 and 23 are turned on. Then, the thermal valves 5, 6, 24 are opened, the circulation pump 7 is operated, and 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 21 → 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 21 → the thermal valve 24 → the fan coil 22 → the expansion tank 8.
[0026]
The bypass pipe 10 bypasses part of the hot water so that it takes time to open the thermal valves 5, 6, 24, and can cope with the case where the thermal valves 5, 6, 24 are out of order. A small amount of warm water flows.
[0027]
Although the hot water temperature control by the thermistor 20 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 25 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 26 is controlled to 60 to 70 ° C. is doing. Further, when the temperature of the medium temperature water is excessively mixed and the temperature is lowered, the heat valve 25 is closed, and the heat valve 25 is controlled to be opened and closed based on the temperature detected by the thermistor 26.
[0028]
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, so the second on-off valve 16 and the second expansion valve 17 are closed.
[0029]
<Hot water storage operation>
When hot water is stored in the hot water storage tank 27, the circulation pump 28 is operated. In the second hot water circulation path C2, the hot water storage tank 27 → the circulation pump 28 → the water flow path 15B of the second water refrigerant heat exchanger 15 → the flow rate adjustment valve 29 → Hot water for hot water supply flows in the order of the hot water storage tank 27 and is stored in the hot water storage tank 27.
[0030]
In the heat pump unit A, the compressor 11 is operated, and in the refrigerant circuit R, the compressor 11 → the refrigerant flow path 15A of the second water refrigerant heat exchanger 15 → the second on-off valve 16 → the second expansion valve 17 → the air heat exchanger. The refrigerant flows in the order of 18 → secondary flow path 12B of internal heat exchanger 12 → accumulator 19 → compressor 11. At this time, since heating is not performed, the first on-off valve 13 and the first expansion valve 14 are closed. Further, the refrigerant simply passes through the secondary flow path 12B of the internal heat exchanger 12, and the other is not affected.
[0031]
The temperature of the hot water supplied to the hot water storage tank 27 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 second expansion valve 17, and the flow rate adjustment. Valve opening degree control of the valve 29 is performed.
[0032]
The hot water stored in the hot water storage tank 27 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 27. In addition, by operating the circulation pumps 32 and 33, the hot water in the hot water storage tank 27 and the hot water in the bathtub 34 can be exchanged with the water heat exchanger 31, and the hot water in the bathtub 34 can be replenished.
[0033]
<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 compressor 11 → the refrigerant flow path 9A of the first water refrigerant heat exchanger 9 → the primary flow path 12A of the internal heat exchanger 12 → the first on-off valve 13 → the first expansion valve 14 → the air heat exchanger. 18 → Secondary flow path 12B of internal heat exchanger 12 → Accumulator 19 → Refrigerant flow path 15A of second water refrigerant heat exchanger 15 → second on-off valve The refrigerant flows in the order of 16 → second expansion valve 17 → air heat exchanger 18 → secondary flow path 12B of the internal heat exchanger 12 → accumulator 19 → compressor 11.
[0034]
Further, the frequency control of the compressor 11, the valve opening control of the first expansion valve 14 and the second expansion valve 17, and the flow rate adjustment valves 21, 29 of the thermistors 20, 26, 30 are set to the target temperatures described above. Valve opening degree control is performed. Basically, the refrigerant is distributed at a ratio of 1: 1 between the first branch path (heating side) P1 and the second branch path P2 (hot water storage side) under the control of the expansion valves 14 and 17, and the simultaneous operation is performed. Even if it is broken, sufficient capacity can be obtained on the heating side and the hot water storage side.
[0035]
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.
[0036]
【The invention's effect】
As described above, the present invention provides a first branch passage including a compressor capable of adjusting capacity, a first water refrigerant heat exchanger for generating hot water for heating, a first on-off valve, and a first pressure reducing device, and a first branch passage. A parallel circuit with a second branch path composed of a two-water refrigerant heat exchanger, a second on-off valve and a second pressure reducing device and an air heat exchanger are sequentially connected in an annular manner to form a refrigerant circuit, and the first Circulating hot water between a first hot water circulation path for circulating hot water between a water refrigerant heat exchanger and a hot water heater such as a floor heating panel, and between the second water refrigerant heat exchanger and a hot water storage tank; the refrigerant exchanges heat with the hot water heated by the refrigerant circuit in the second coolant-refrigerant heat exchanger and a second water circulation pipe for hot water storage in the hot water storage tank, the first on-off valve and the second on-off by Only heating by circulating hot water in the first hot water circuit according to the opening and closing of the valve, Only hot water storage to the hot water storage tank by circulating hot water in two hot-water circulation path, or it is so arranged above allows both the heating and hot-water is, and when performing the hot water hot water storage and a hot water heating simultaneously, either It is possible to provide a heat pump type hot water heater / heater that is capable of exhibiting necessary capabilities in correspondence with any of the cases where one is performed and that is easy to use.
[0037]
Moreover, since the heat exchanger which performs heat exchange with the refrigerant | coolant which flowed out from the 1st water refrigerant | coolant heat exchanger of the 1st branch of a refrigerant circuit and the refrigerant | coolant which flowed out from the air heat exchanger is provided, when performing hot water heating In addition, even when the heating load is small, it is possible to prevent a large load from being applied to the compressor, and the reliability is high.
[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, 15 Water refrigerant heat exchanger 11 Compressor 12 Internal heat exchanger 13 First on-off valve 16 Second on-off valve 14 First expansion valve (pressure reduction device)
17 Second expansion valve (pressure reduction device)
22 Fan coil 27 Hot water storage tank C1 First hot water circuit C2 Second hot water circuit 18 Air heat exchanger P1 First branch P2 Second branch R Refrigerant circuit

Claims

A capacity adjustable compressor, a first water-refrigerant heat exchanger for generating hot water for heating, a first branch passage and a second water-refrigerant heat exchanger comprising a first on-off valve and a first pressure reducing device, A parallel circuit with a second branch path composed of two on-off valves and a second pressure reducing device and an air heat exchanger are sequentially connected in an annular manner to form a refrigerant circuit, and the first water refrigerant heat exchanger and floor heating A first hot water circulation path for circulating hot water between a hot water heater such as a panel, and the second water refrigerant heat exchange by circulating hot water between the second water refrigerant heat exchanger and the hot water storage tank. And a second hot water circulation path for storing hot water in the hot water storage tank that is heated by exchanging heat with the refrigerant in the refrigerant circuit in a cooler, and according to opening and closing of the first on-off valve and the second on-off valve, Only heating by circulating hot water in the first hot water circulation path, the temperature in the second hot water circulation path is Heat pump water heater heating system, wherein the only hot water storage to the storage tank, or that can be performed both of the heating and hot-water by circulating.

The heat exchanger which performs heat exchange with the refrigerant | coolant which flowed out from the 1st water refrigerant | coolant heat exchanger of the 1st branch of the said refrigerant circuit, and the refrigerant | coolant which flowed out of the said air heat exchanger was provided. The heat pump type hot water supply and heating device described in 1.