JP3654017B2

JP3654017B2 - Multi-function heat pump system

Info

Publication number: JP3654017B2
Application number: JP35164198A
Authority: JP
Inventors: 淳一高橋; 賢哉川崎; 光小林; 寛北川; 仁平井
Original assignee: Taisei Corp; Nippon Pmac Co Ltd
Current assignee: Taisei Corp; Nippon Pmac Co Ltd
Priority date: 1998-12-10
Filing date: 1998-12-10
Publication date: 2005-06-02
Anticipated expiration: 2018-12-10
Also published as: JP2000179985A

Description

【０００１】
【発明の属する技術分野】
本発明は、冷房、暖房、氷蓄熱、温水蓄熱、給湯加熱および各種の同時運転などを可能にする住宅などに使用される多機能ヒートポンプシステムに関するものである。
【０００２】
【従来の技術】
従来、住宅用ヒートポンプシステムとして、ヒートポンプ給湯が可能で冷房の排熱を給湯加熱に利用することが可能なものや、貯湯槽に冷水蓄熱を行い電力負荷の平準化を図るものなど各種のものが提案されている。
【０００３】
【発明が解決しようとする課題】
そして、現在でも、さらなる空調負荷のピーク時の電力負荷平準化や省エネルギー化等が要望されている。
本発明は、上記事情に鑑みなされたもので、請求項１に記載の発明は、氷蓄熱および温水蓄熱を利用して夜間電力を有効に利用できるとともに、氷蓄熱および冷房時の排熱を利用して給湯加熱可能な多機能ヒートポンプシステムを提供することを目的とするものである。
【０００４】
また、請求項２に記載の発明は、据付時や改修時の配管工事に伴う冷媒漏れに対応した多機能ヒートポンプシステムを提供することを目的とするものである。
【０００５】
さらに、請求項３に記載の発明は、電気温水器による給湯加熱を併用可能な多機能ヒートポンプシステムを提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
上記目的を達成するために、請求項１に記載の多機能ヒートポンプシステムは、圧縮機と室外熱交換器と第１の減圧機構と室内熱交換器とがこの順に環状に接続されるとともに、循環ポンプによって循環する貯湯槽からの循環水を加熱して給湯加熱を行う給湯用熱交換器と、第２の減圧機構と、氷蓄熱および温水蓄熱兼用の蓄熱槽と、第３の減圧機構とが介装され、これらの間に冷媒が循環されてなり、かつ、氷蓄熱運転時は、上記冷媒が上記圧縮機、上記室外熱交換器、上記第２の減圧機構、上記蓄熱槽および上記圧縮機の順に循環され、氷蓄熱・給湯加熱同時運転時は、上記冷媒が上記圧縮機、上記給湯用熱交換器、上記室外熱交換器、上記第２の減圧機構、上記蓄熱槽および上記圧縮機の順に循環され、冷房運転時は、上記冷媒が上記圧縮機、上記室外熱交換器、上記第１の減圧機構、上記室内熱交換器および上記圧縮機の順に循環され、冷房・給湯加熱同時運転時は、上記冷媒が上記圧縮機、上記給湯用熱交換器、上記室外熱交換器、上記第１の減圧機構、上記室内熱交換器および上記圧縮機の順に循環され、氷蓄熱利用冷房運転時は、上記冷媒が上記圧縮機、上記室外熱交換器、上記蓄熱槽、上記第１の減圧機構、上記室内熱交換器および上記圧縮機の順に循環され、氷蓄熱利用冷房・給湯加熱同時運転時は、上記冷媒が上記圧縮機、上記給湯用熱交換器、上記室外熱交換器、上記蓄熱槽、上記第１の減圧機構、上記室内熱交換器および上記圧縮機の順に循環され、温水蓄熱運転時は、上記冷媒が上記圧縮機、上記蓄熱槽、上記第２の減圧機構、上記室外熱交換器および上記圧縮機の順に循環され、外気を熱源とする暖房運転時は、上記冷媒が上記圧縮機、上記室内熱交換器、上記第１の減圧機構、上記室外熱交換器および上記圧縮機の順に循環され、温水蓄熱利用暖房運転時は、上記冷媒が上記圧縮機、上記室内熱交換器、上記第１の減圧機構、上記蓄熱槽および上記圧縮機の順に循環され、給湯加熱運転時は、上記冷媒が上記圧縮機、上記給湯用熱交換器、上記第３の減圧機構、上記室外熱交換器および上記圧縮機の順に循環されることを特徴とするものである。
【０００７】
また、請求項２に記載の多機能ヒートポンプシステムは、請求項１において、上記圧縮機、上記室外熱交換器、上記第１の減圧機構、上記室内熱交換器、上記給湯用熱交換器、上記第２の減圧機構、上記蓄熱槽および上記第３の減圧機構は、ユニット化されていることを特徴とするものである。
【０００８】
さらに、請求項３に記載の多機能ヒートポンプシステムは、請求項１または請求項３において、上記貯湯槽は、電気温水器からなることを特徴とするものである。
【０００９】
請求項１の発明においては、氷蓄熱運転、氷蓄熱・給湯加熱同時運転、冷房運転、冷房・給湯加熱同時運転、氷蓄熱利用冷房運転、氷蓄熱利用冷房・給湯加熱同時運転、温水蓄熱運転、外気を熱源とする暖房運転、温水蓄熱利用暖房運転および給湯加熱運転が可能となる。
したがって、氷蓄熱および温水蓄熱を利用して夜間電力が有効に利用されるため、空調負荷のピーク時の電力負荷平準化および割安な電力の利用による省ランニングコスト化が図られる。また、氷蓄熱および冷房時の排熱を利用して給湯加熱されるため、省エネルギー化および省コスト化が図られる。
【００１０】
請求項２の発明においては、圧縮機、室外熱交換器、第１の減圧機構、室内熱交換器、給湯用熱交換器、第２の減圧機構、蓄熱槽および第３の減圧機構がユニット化され一体化されているので、これらの間に冷媒を循環させる冷媒配管が当該ユニット内に収められ、外部には一切不要となるため、据付時や改修時の配管工事の際に、冷媒が当該ユニットの外部に漏れることがない。
【００１１】
請求項３の発明においては、電気温水器を貯湯槽としたので、電気温水器による給湯加熱を併せて行うことが可能となる。
【００１２】
【発明の実施の形態】
以下、本発明の多機能ヒートポンプシステムの一実施の態様を図面に基づいて説明する。
図１は、本実施の態様に係る多機能ヒートポンプシステムの冷媒回路図である。
同図において、符号１は、圧縮機であり、この圧縮機１の吐出側には、Ｒ−２２（フロン）等の冷媒が流される冷媒配管２によって、乾式二重管式の給湯用熱交換器３が接続されている。冷媒配管２には、電磁開閉弁２Ａが介装されている。給湯用熱交換器３と、電気温水器４との間には循環ポンプ５によって循環水が循環される。電気温水器４は、電気ヒータによる本来の加熱が可能であり、さらに本実施の態様では給湯用熱交換器３による給湯加熱がなされ、この場合には貯湯槽として機能する。
【００１３】
給湯用熱交換器３には、冷媒配管６によってプロペラ式の送風機７が併設されたプレートフィン式の室外熱交換器８が接続されている。冷媒配管６には、電磁開閉弁９Ａ、電磁開閉弁９が、給湯用熱交換器３側から順に介装されている。
【００１４】
室外熱交換器８には、電磁開閉弁１０Ａが介装された冷媒配管１０が接続され、この冷媒配管１０は、３つの冷媒配管１１、１２、１３に分岐されている。分岐された冷媒配管１１は、電磁開閉弁１４を介して第１の膨張弁（第１の減圧機構）１５に接続されている。この第１の膨張弁１５には、両吸込シロッコ式の送風機１６が併設された室内熱交換器１７が接続されている。室内熱交換器１７には、冷媒配管１８によって圧縮機１に接続されている。冷媒配管１８には電磁開閉弁１９が介装されている。
【００１５】
上記分岐された冷媒配管１２は、第２の膨張弁（第２の減圧機構）２０に接続され、この第２の膨張弁２０には、冷媒配管２１によって冷媒過冷却型の氷蓄熱および温水蓄熱兼用の蓄熱槽２２が接続されている。
上記分岐された冷媒配管１３は、電磁開閉弁１３Ａを介して冷媒配管２１に接続されている。
【００１６】
蓄熱槽２２には、冷媒配管２３が接続され、この冷媒配管２３は、３つの冷媒配管２４、２５、２６に分岐されている。分岐された冷媒配管２４は、電磁開閉弁２７を介して、冷媒配管１１における電磁開閉弁１４と第１の膨張弁１５との間に接続されている。また、分岐された冷媒配管２５は、電磁開閉弁２８を介して、冷媒配管１８における室内熱交換器１７と電磁開閉弁１９との間に接続されている。また、分岐された冷媒配管２６は、電磁開閉弁２９を介して、冷媒配管１８における電磁開閉弁１９と圧縮機１との間に接続されている。
【００１７】
上記冷媒配管６における電磁開閉弁９Ａと電磁開閉弁９との間に、冷媒配管３０の一端が接続され、この冷媒配管３０の他端は、冷媒配管１８における電磁開閉弁１９より室内熱交換器１７側に接続されている。冷媒配管３０には、電磁開閉弁３１が介装されている。
また、冷媒配管６における電磁開閉弁９と室外熱交換器８との間に、冷媒配管３２の一端が接続され、この冷媒配管３２の他端は、冷媒配管２６における電磁開閉弁２９より圧縮機１側に接続されている。冷媒配管３２には、電磁開閉弁３３が介装されている。
【００１８】
上記冷媒配管２における圧縮機１と電磁開閉弁２Ａとの間に、冷媒配管３４の一端が接続され、この冷媒配管３４の他端は、冷媒配管６における電磁開閉弁９Ａと、冷媒配管６と冷媒配管３０との接続部６Ａとの間に、接続部６Ｂとして接続されている。冷媒配管３４には、電磁開閉弁３４Ａが介装されている。
また、上記接続部６Ｂには、冷媒配管３５の一端が接続され、この冷媒配管３５の他端は、冷媒配管１０における電磁開閉弁１０Ａより室外熱交換器８の反対側に接続されている。冷媒配管３５には、第３の膨張弁（第３の減圧機構）３６が介装されている。
【００１９】
ここで、図１において、二点鎖線で囲った部分、すなわち、圧縮機１、給湯用熱交換器３、循環ポンプ５、室外熱交換器８、送風機７、第１の膨張弁１５、室内熱交換器１７、送風機１６、第２の膨張弁２０、蓄熱槽２２、第３の膨張弁３６、各冷媒配管および各電磁開閉弁は、ユニットＡとしてユニット化されて構成されている。これらの機器および冷媒配管は、図２に概略示すように、筐体Ｂの中に収納されている。
送風機１６によって送風される空調空気は、給気ダクトＣによって住戸内に導かれ、還気ダクトＤによって戻される。
なお、同図において、Ｆはフィルタ、Ｇ、Ｈは、給湯加熱用配管である。
【００２０】
このように構成された多機能ヒートポンプシステムは、制御手段によって制御され、次のように各種の運転がなされる。
以下、各種の運転について説明する。
【００２１】
（氷蓄熱運転）
本運転は、通常、夏季の夜間に運転される。
図３に示すように、本運転では、電磁開閉弁３４Ａ、電磁開閉弁９、電磁開閉弁１０Ａ、第２の膨張弁２０および電磁開閉弁２９が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁３４Ａ、電磁開閉弁９、室外熱交換器８、電磁開閉弁１０Ａ、第２の膨張弁２０、蓄熱槽２２、電磁開閉弁２９および圧縮機１の順に循環される。
【００２２】
この間に、圧縮機１から吐出された高温・高圧の冷媒ガスは、室外熱交換器８を通過する。室外熱交換器８は凝縮器として機能し、高温・高圧の冷媒ガスは、室外熱交換器８を通過する間に、凝縮して高圧の冷媒液となった後、第２の膨張弁２０により減圧されて低圧二相状態にされる。その後、蓄熱槽２２が蒸発器として機能し、冷媒が蓄熱槽２２を通過する間に蒸発して低圧ガスとされる一方、蓄熱槽２２には氷蓄熱される。その後、冷媒ガスは圧縮機１の吸入側に戻される。
【００２３】
本運転においては、夜間電力を利用して氷蓄熱を行うので、夜間電力を有効利用することができる。
【００２４】
（氷蓄熱・給湯加熱同時運転）
本運転は、通常、夏季の夜間に運転される。
図４に示すように、本運転では、電磁開閉弁２Ａ、電磁開閉弁９Ａ、電磁開閉弁９、電磁開閉弁１０Ａ、第２の膨張弁２０および電磁開閉弁２９が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁２Ａ、給湯用熱交換器３、電磁開閉弁９Ａ、電磁開閉弁９、室外熱交換器８、電磁開閉弁１０Ａ、第２の膨張弁２０、蓄熱槽２２、電磁開閉弁２９および圧縮機１の順に循環される。
【００２５】
この間に、圧縮機１から吐出された高温・高圧の冷媒ガスは、給湯用熱交換器３を通過し、ここで循環ポンプ５によって循環する電気温水器４からの循環水を加熱して給湯加熱を行い、その後室外熱交換器８を通過する。この給湯用熱交換器３および室外熱交換器８は凝縮器として機能し、高温・高圧の冷媒ガスは、これらを通過する間に、凝縮して高圧の冷媒液となった後、第２の膨張弁２０により減圧されて低圧二相状態にされる。その後、蓄熱槽２２が蒸発器として機能し、冷媒が蓄熱槽２２を通過する間に蒸発して低圧ガスとされる一方、蓄熱槽２２には氷蓄熱される。その後、冷媒ガスは圧縮機１の吸入側に戻される。
【００２６】
本運転においては、夜間電力を利用して氷蓄熱を行うので、夜間電力を有効利用することができる。また、蓄熱槽２２の利用に伴って発生する排熱を、給湯用熱交換器３の給湯加熱に利用することができるから、省エネルギおよび省コスト化を図ることができる。
【００２７】
（冷房運転）
本運転は、通常、夏季に運転される。
本運転においては、通常行われている冷房運転がなされる。
図５に示すように、本運転では、電磁開閉弁３４Ａ、電磁開閉弁９、電磁開閉弁１０Ａ、電磁開閉弁１４、第１の膨張弁１５および電磁開閉弁１９が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁３４Ａ、電磁開閉弁９、室外熱交換器８、電磁開閉弁１０Ａ、電磁開閉弁１４、第１の膨張弁１５、室内熱交換器１７、電磁開閉弁１９および圧縮機１の順に循環される。
【００２８】
この間に、圧縮機１から吐出された高温・高圧の冷媒ガスは、室外熱交換器８を通過する。この室外熱交換器８は凝縮器として機能し、高温・高圧の冷媒ガスは、この室外熱交換器８を通過する間に、凝縮して高圧の冷媒液となった後、第１の膨張弁１５により減圧されて低圧二相状態にされる。その後、室内熱交換器１７が蒸発器として機能し、冷媒が室内熱交換器１７を通過する間に蒸発して低圧ガスとされる。その後、冷媒ガスは圧縮機１の吸入側に戻される。
【００２９】
（冷房・給湯加熱同時運転）
本運転は、通常、夏季に運転される。
図６に示すように、本運転では、電磁開閉弁２Ａ、電磁開閉弁９Ａ、電磁開閉弁９、電磁開閉弁１０Ａ、電磁開閉弁１４、第１の膨張弁１５および電磁開閉弁１９が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁２Ａ、給湯用熱交換器３、電磁開閉弁９Ａ、電磁開閉弁９、室外熱交換器８、電磁開閉弁１０Ａ、電磁開閉弁１４、第１の膨張弁１５、室内熱交換器１７、電磁開閉弁１９および圧縮機１の順に循環される。
【００３０】
この間に、圧縮機１から吐出された高温・高圧の冷媒ガスは、給湯用熱交換器３を通過し、ここで循環ポンプ５によって循環する電気温水器４からの循環水を加熱して給湯加熱を行い、その後室外熱交換器８を通過する。この給湯用熱交換器３および室外熱交換器８は凝縮器として機能し、高温・高圧の冷媒ガスは、これらを通過する間に、凝縮して高圧の冷媒液となった後、第１の膨張弁１５により減圧されて低圧二相状態にされる。その後、室内熱交換器１７が蒸発器として機能し、冷媒が室内熱交換器１７を通過する間に蒸発して低圧ガスとされる。その後、冷媒ガスは圧縮機１の吸入側に戻される。
【００３１】
本運転においては、室内熱交換器２０で発生する排熱を、給湯用熱交換器３の給湯加熱に利用することができるから、省エネルギーおよび省コスト化を図ることができる。
【００３２】
（氷蓄熱利用冷房運転）
本運転は、通常、夏季の昼間の電力ピーク時間帯（通常午後１時から午後４時頃）に運転される。
図７に示すように、本運転では、電磁開閉弁３４Ａ、電磁開閉弁９、電磁開閉弁１０Ａ、電磁開閉弁１３Ａ、電磁開閉弁２７、第１の膨張弁１５および電磁開閉弁１９が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁３４Ａ、電磁開閉弁９、室外熱交換器８、電磁開閉弁１０Ａ、電磁開閉弁１３Ａ、蓄熱槽２２、電磁開閉弁２７、第１の膨張弁１５、室内熱交換器１７、電磁開閉弁１９および圧縮機１の順に循環される。
【００３３】
この間に、圧縮機１から出された高温・高圧の冷媒ガスは、室外熱交換器８および蓄熱槽２２を通過する。これら室外熱交換器８および蓄熱槽２２は凝縮器として機能し、高温・高圧の冷媒ガスは、これらを通過する間に、凝縮して高圧の冷媒液となった後、第１の膨張弁１５により減圧されて低圧二相状態にされる。その後、室内熱交換器１７が蒸発器として機能し、冷媒が室内熱交換器１７を通過する間に蒸発して低圧ガスとされる。その後、冷媒ガスは圧縮機１の吸入側に戻される。
【００３４】
本運転においては、蓄熱槽２２の氷蓄熱を利用して冷媒の凝縮を行うので、冷房能力が向上するとともに、夜間電力により氷蓄熱されているので電力ピークカットを図ることができる。
【００３５】
（氷蓄熱利用冷房・給湯加熱同時運転）
本運転は、通常、夏季の昼間の電力ピーク時間帯（通常午後１時から午後４時頃）に運転される。
図８に示すように、本運転では、電磁開閉弁２Ａ、電磁開閉弁９Ａ、電磁開閉弁９、電磁開閉弁１０Ａ、電磁開閉弁１３Ａ、電磁開閉弁２７、第１の膨張弁１５および電磁開閉弁１９が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁２Ａ、給湯用熱交換器３、電磁開閉弁９Ａ、電磁開閉弁９、室外熱交換器８、電磁開閉弁１０Ａ、電磁開閉弁１３Ａ、蓄熱槽２２、電磁開閉弁２７、第１の膨張弁１５、室内熱交換器１７、電磁開閉弁１９および圧縮機１の順に循環される。
【００３６】
この間に、圧縮機１から出された高温・高圧の冷媒ガスは、給湯用熱交換器３を通過し、ここで循環ポンプ５によって循環する電気温水器４からの循環水を加熱して給湯加熱を行い、その後室外熱交換器８および蓄熱槽２２を通過する。これら給湯用熱交換器３、室外熱交換器８および蓄熱槽２２は凝縮器として機能し、高温・高圧の冷媒ガスは、これらを通過する間に、凝縮して高圧の冷媒液となった後、第１の膨張弁１５により減圧されて低圧二相状態にされる。その後、室内熱交換器１７が蒸発器として機能し、冷媒が室内熱交換器１７を通過する間に蒸発して低圧ガスとされる。その後、冷媒ガスは圧縮機１の吸入側に戻される。
【００３７】
本運転においては、蓄熱槽２２の氷蓄熱を利用して冷媒の凝縮を行うので、冷房能力が向上するとともに、夜間電力により氷蓄熱されているので電力ピークカットを図ることができる。また、室内熱交換器１７で発生する排熱を、給湯用熱交換器３の給湯加熱に利用することができるから、省エネルギおよび省コスト化を図ることができる。
【００３８】
（温水蓄熱運転）
本運転は、通常、冬季の夜間に運転される。
図９に示すように、本運転では、電磁開閉弁３４Ａ、電磁開閉弁３１、電磁開閉弁２８、第２の膨張弁２０、電磁開閉弁１０Ａおよび電磁開閉弁３３が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁３４Ａ、電磁開閉弁３１、電磁開閉弁２８、蓄熱槽２２、第２の膨張弁２０、電磁開閉弁１０Ａ、室外熱交換器８、電磁開閉弁３３および圧縮機１の順に循環される。
【００３９】
この間に、圧縮機１から吐出された高温・高圧の冷媒ガスは、蓄熱槽２０を通過する。この蓄熱槽２２は凝縮器として機能し、高温・高圧の冷媒ガスは、これらを通過する間に、凝縮して高圧の冷媒液となる一方、蓄熱槽２２では温水蓄熱が行われる。その後、冷媒は第２の膨張弁２０により減圧されて低圧二相状態にされる。その後、室外熱交換器８が蒸発器として機能し、冷媒が室外熱交換器８を通過する間に蒸発して低圧ガスとされ、その後圧縮機１の吸入側に戻される。
【００４０】
本運転においては、夜間電力を利用して温水蓄熱を行うので、夜間電力を有効利用することができる。また、外気を熱源として室外熱交換器８によって採熱しこの熱を利用して、温水蓄熱を行うので、省エネルギーおよび省コスト化を図ることができる。
【００４１】
（外気を熱源とする暖房運転）
本運転は、通常、冬季の昼間に運転される。
本運転においては、外気を熱源とするヒートポンプとして作動する。
図１０に示すように、本運転では、電磁開閉弁３４Ａ、電磁開閉弁３１、第１の膨張弁１５、電磁開閉弁１４、電磁開閉弁１０Ａおよび電磁開閉弁３３が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁３４Ａ、電磁開閉弁３１、室内熱交換器１７、第１の膨張弁１５、電磁開閉弁１４、電磁開閉弁１０Ａ、室外熱交換器８、電磁開閉弁３３および圧縮機１の順に循環される。
【００４２】
この間に、圧縮機１から吐出された高温・高圧の冷媒ガスは、室内熱交換器１７を通過する。室内熱交換器１７は凝縮器として機能し、高温・高圧の冷媒ガスは、この室内熱交換器１７を通過する間に、凝縮して高圧の冷媒液となる。その後、冷媒は第１の膨張弁１５により減圧されて低圧二相状態にされる。その後、室外熱交換器８が蒸発器として機能し、冷媒が室外熱交換器８を通過する間に蒸発して低圧ガスとされ、その後圧縮機１の吸入側に戻される。
【００４３】
（温水蓄熱利用暖房運転）
本運転は、通常、冬季の朝の暖房ピーク時に運転される。
図１１に示すように、本運転では、電磁開閉弁３４Ａ、電磁開閉弁３１、第１の膨張弁１５、電磁開閉弁１４、電磁開閉弁１３Ａおよび電磁開閉弁２９が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁３４Ａ、電磁開閉弁３１、室内熱交換器１７、第１の膨張弁１５、電磁開閉弁１４、電磁開閉弁１３Ａ、蓄熱槽２２、電磁開閉弁２９および圧縮機１の順に循環される。
【００４４】
この間に、圧縮機１から吐出された高温・高圧の冷媒ガスは、室内熱交換器１７を通過する。室内熱交換器１７は凝縮器として機能し、高温・高圧の冷媒ガスは、この室内熱交換器１７を通過する間に、凝縮して高圧の冷媒液となる。その後、冷媒は第１の膨張弁１５により減圧されて低圧二相状態にされる。その後、蓄熱槽２２が蒸発器として機能し、冷媒がこれらを通過する間に蒸発して低圧ガスとされ、その後圧縮機１の吸入側に戻される。
【００４５】
本運転においては、外気温度よりも高い温度の蓄熱槽２２の温水蓄熱を利用して冷媒の蒸発を行うので、暖房能力が向上するとともに、夜間電力により温熱蓄熱されているので朝の電力ピークカットを図ることができる。
【００４６】
（給湯加熱運転）
本運転のヒートポンプによる給湯加熱は、通常、中間季に利用される。
図１２に示すように、本運転では、電磁開閉弁２Ａ、電磁開閉弁９Ａ、第３の膨張弁３６、電磁開閉弁１０Ａおよび電磁開閉弁３３が開弁されるとともに、他の電磁開閉弁および膨張弁は閉弁され、そして冷媒は、実線矢印で示すように、圧縮機１、電磁開閉弁２Ａ、給湯用熱交換器３、電磁開閉弁９Ａ、第３の膨張弁３６、電磁開閉弁１０Ａ、室外熱交換器８、電磁開閉弁３３および圧縮機１の順に循環される。
【００４７】
この間に、圧縮機１から吐出された高温・高圧の冷媒ガスは、給湯用熱交換器３を通過し、ここで循環ポンプ５によって循環する電気温水器４からの循環水を加熱して給湯加熱を行う。この給湯用熱交換器３は凝縮器として機能し、高温・高圧の冷媒ガスは、これらを通過する間に、凝縮して高圧の冷媒液となる。その後、冷媒は第３の膨張弁３６により減圧されて低圧二相状態にされる。その後、室外熱交換器８が蒸発器として機能し、冷媒が室外熱交換器８を通過する間に蒸発して低圧ガスとされ、その後圧縮機１の吸入側に戻される。
【００４８】
このような多機能ヒートポンプシステムにあっては、氷蓄熱運転、氷蓄熱・給湯加熱同時運転、冷房運転、冷房・給湯加熱同時運転、氷蓄熱利用冷房運転、氷蓄熱利用冷房・給湯加熱同時運転、温水蓄熱運転、外気を熱源とする暖房運転、温水蓄熱利用暖房運転および給湯加熱運転を行うことが可能であるので、氷蓄熱および温水蓄熱を利用して夜間電力を有効に利用することができ、したがって空調負荷のピーク時の電力負荷平準化および割安な電力の利用による省ランニングコスト化を図ることが可能になる。また、氷蓄熱および冷房時の排熱を利用して給湯加熱することができるため、省エネルギー化および省コスト化を図ることが可能になる。
【００４９】
さらに、圧縮機１、給湯用熱交換器３、循環ポンプ５、室外熱交換器８、送風機７、第１の膨張弁１５、室内熱交換器１７、送風機１６、第２の膨張弁２０、蓄熱槽２２、第３の膨張弁３６、各冷媒配管および各電磁開閉弁が、筐体Ｂの中に収納されてユニットＡとしてユニット化されているので、外部には一切冷媒配管を施設する必要がないため、据付時や改修時の配管工事の際に、冷媒がユニットＡの外部に漏れるのを防止することが可能になる。
【００５０】
加えて、電気温水器４を貯湯槽として使用したので、電気温水器として電気ヒータによる給湯加熱を行い、これによる給湯も併せて行うことが可能である。
【００５１】
【発明の効果】
以上説明したように、請求項１に記載の多機能ヒートポンプシステムによれば、氷蓄熱運転、氷蓄熱・給湯加熱同時運転、冷房運転、冷房・給湯加熱同時運転、氷蓄熱利用冷房運転、氷蓄熱利用冷房・給湯加熱同時運転、温水蓄熱運転、外気を熱源とする暖房運転、温水蓄熱利用暖房運転および給湯加熱運転を行うことができるから、氷蓄熱および温水蓄熱を利用して夜間電力を有効に利用することができるので、空調負荷のピーク時の電力負荷平準化および割安な電力の利用による省ランニングコスト化を図ることができるとともに、氷蓄熱および冷房時の排熱を利用して給湯加熱することができるので、省エネルギーおよび省コスト化を図ることができるという効果を奏する。
【００５２】
また、請求項２に記載の多機能ヒートポンプシステムによれば、圧縮機、室外熱交換器、減圧機構、室内熱交換器、給湯用熱交換器、第２の減圧機構、蓄熱槽および第３の減圧機構をユニット化し一体化したから、これらの間に冷媒を循環させる冷媒配管を当該ユニット内に収納することができ、外部には一切冷媒配管を施設する必要がないため、据付時や改修時の配管工事の際に、冷媒が当該ユニットの外部に漏れるのを防止することができる。
【００５３】
さらに、請求項３に記載の多機能ヒートポンプシステムによれば、電気温水器を貯湯槽としたから、電気温水器による給湯加熱を併せて行うことができるという利点を有する。
【図面の簡単な説明】
【図１】本発明の多機能ヒートポンプシステムの一実施の態様を示す冷媒回路図である。
【図２】本発明に係るユニットを示す概略透視斜視図である。
【図３】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、氷蓄熱運転時の冷媒回路図である。
【図４】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、氷蓄熱・給湯加熱同時運転時の冷媒回路図である。
【図５】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、冷房運転時の冷媒回路図である。
【図６】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、冷房・給湯加熱同時運転時の冷媒回路図である。
【図７】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、氷蓄熱利用冷房運転時の冷媒回路図である。
【図８】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、氷蓄熱利用冷房・給湯加熱同時運転時の冷媒回路図である。
【図９】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、温水蓄熱運転時の冷媒回路図である。
【図１０】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、外気を熱源とする暖房運転時の冷媒回路図である。
【図１１】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、温水蓄熱利用暖房運転時の冷媒回路図である。
【図１２】本発明の多機能ヒートポンプシステムの一実施の態様を示す図であって、給湯加熱運転時の冷媒回路図である。
【符号の説明】
１圧縮機
３給湯用熱交換器
４電気温水器（貯湯槽）
５循環ポンプ
８室外熱交換器
１５第１の膨張弁（第１の減圧機構）
１７室内熱交換器
２０第２の膨張弁（第２の減圧機構）
２２蓄熱槽
３６第３の膨張弁（第３の減圧機構）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multi-functional heat pump system used in a house that enables cooling, heating, ice heat storage, hot water heat storage, hot water supply heating, various simultaneous operations, and the like.
[0002]
[Prior art]
Conventionally, there are various types of heat pump systems for houses, such as those that can supply hot water with heat pumps and use the exhaust heat of cooling for hot water heating, and those that store cold water in hot water storage tanks to equalize the power load. Proposed.
[0003]
[Problems to be solved by the invention]
Even now, there is a demand for further leveling of power load and energy saving at the peak of air conditioning load.
The present invention has been made in view of the above circumstances, and the invention according to claim 1 can effectively use nighttime electric power by utilizing ice heat storage and hot water heat storage, and also utilizes ice heat storage and exhaust heat during cooling. It is an object of the present invention to provide a multifunction heat pump system capable of heating hot water.
[0004]
Moreover, the invention described in claim 2 is to provide a multi-functional heat pump system that can cope with refrigerant leakage accompanying piping work at the time of installation or repair.
[0005]
Furthermore, the invention described in claim 3 is to provide a multi-functional heat pump system that can be used in combination with hot water heating by an electric water heater.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the multifunction heat pump system according to claim 1 is configured such that the compressor, the outdoor heat exchanger, the first pressure reducing mechanism, and the indoor heat exchanger are annularly connected in this order and are circulated. A hot water supply heat exchanger for heating hot water by heating circulating water from a hot water tank circulated by a pump, a second pressure reduction mechanism, a heat storage tank for both ice heat storage and hot water heat storage, and a third pressure reduction mechanism The refrigerant is circulated between them, and during the ice heat storage operation, the refrigerant is the compressor, the outdoor heat exchanger, the second decompression mechanism, the heat storage tank, and the compressor. In the simultaneous operation of ice heat storage and hot water heating, the refrigerant is stored in the compressor, the hot water heat exchanger, the outdoor heat exchanger, the second pressure reducing mechanism, the heat storage tank, and the compressor. The refrigerant is circulated in order, and the cooling medium is The compressor, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor are circulated in this order, and during the cooling and hot water heating simultaneous operation, the refrigerant is used as the compressor and the hot water supply heat. The refrigerant is circulated in the order of the exchanger, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor, and during the cooling operation using ice heat storage, the refrigerant is the compressor, the outdoor heat exchanger. The heat storage tank, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor are circulated in this order, and during the simultaneous operation of cooling and hot water heating using ice heat storage, the refrigerant is used for the heat exchange for the compressor and the hot water supply. , The outdoor heat exchanger, the heat storage tank, the first decompression mechanism, the indoor heat exchanger and the compressor are circulated in this order, and during the hot water heat storage operation, the refrigerant is the compressor, the heat storage tank, The second pressure reducing mechanism, the outdoor heat exchanger, and The refrigerant is circulated in the order of the compressor, and the refrigerant circulates in the order of the compressor, the indoor heat exchanger, the first pressure reducing mechanism, the outdoor heat exchanger, and the compressor during heating operation using outside air as a heat source. During the heating operation using hot water heat storage, the refrigerant is circulated in the order of the compressor, the indoor heat exchanger, the first pressure reducing mechanism, the heat storage tank, and the compressor, and during the hot water heating operation, the refrigerant is circulated. Are circulated in the order of the compressor, the hot water heat exchanger, the third pressure reducing mechanism, the outdoor heat exchanger, and the compressor.
[0007]
Further, the multifunction heat pump system according to claim 2 is the compressor according to claim 1, wherein the compressor, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, the hot water supply heat exchanger, The second decompression mechanism, the heat storage tank, and the third decompression mechanism are unitized.
[0008]
Furthermore, the multifunction heat pump system according to claim 3 is characterized in that, in claim 1 or claim 3, the hot water storage tank comprises an electric water heater.
[0009]
In the invention of claim 1, ice heat storage operation, ice heat storage / hot water heating simultaneous operation, cooling operation, cooling / hot water heating simultaneous operation, ice heat storage cooling operation, ice heat storage cooling / hot water heating simultaneous operation, hot water heat storage operation, Heating operation using outside air as a heat source, heating operation using hot water heat storage, and hot water supply heating operation are possible.
Therefore, since night electricity is effectively used by using ice heat storage and hot water heat storage, it is possible to reduce the running cost by leveling the power load at the peak of the air conditioning load and using cheap power. Further, the hot water supply is heated using ice heat storage and exhaust heat at the time of cooling, so that energy saving and cost saving are achieved.
[0010]
In the invention of claim 2, the compressor, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, the hot water heat exchanger, the second pressure reducing mechanism, the heat storage tank, and the third pressure reducing mechanism are unitized. Since the refrigerant piping that circulates the refrigerant between them is housed in the unit and is not required at all outside, the refrigerant is not used during piping work during installation or refurbishment. There is no leakage outside the unit.
[0011]
In the invention of claim 3, since the electric water heater is a hot water storage tank, hot water heating by the electric water heater can be performed together.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a multifunction heat pump system of the present invention will be described with reference to the drawings.
FIG. 1 is a refrigerant circuit diagram of the multifunction heat pump system according to the present embodiment.
In the figure, reference numeral 1 designates a compressor. On the discharge side of the compressor 1, a dry double pipe type hot water supply heat exchange is performed by a refrigerant pipe 2 through which a refrigerant such as R-22 (Freon) flows. A device 3 is connected. The refrigerant pipe 2 is provided with an electromagnetic on-off valve 2A. Circulating water is circulated between the hot water supply heat exchanger 3 and the electric water heater 4 by a circulation pump 5. The electric water heater 4 can be originally heated by an electric heater, and in the present embodiment, hot water supply heating is performed by the hot water supply heat exchanger 3, and in this case, the electric water heater 4 functions as a hot water storage tank.
[0013]
A plate fin type outdoor heat exchanger 8 provided with a propeller type blower 7 is connected to the hot water supply heat exchanger 3 by a refrigerant pipe 6. The refrigerant pipe 6 is provided with an electromagnetic on-off valve 9A and an electromagnetic on-off valve 9 in that order from the hot water supply heat exchanger 3 side.
[0014]
The outdoor heat exchanger 8 is connected to a refrigerant pipe 10 provided with an electromagnetic on-off valve 10A. The refrigerant pipe 10 is branched into three refrigerant pipes 11, 12, and 13. The branched refrigerant pipe 11 is connected to a first expansion valve (first decompression mechanism) 15 via an electromagnetic on-off valve 14. The first expansion valve 15 is connected to an indoor heat exchanger 17 provided with both suction sirocco blowers 16. The indoor heat exchanger 17 is connected to the compressor 1 by a refrigerant pipe 18. An electromagnetic open / close valve 19 is interposed in the refrigerant pipe 18.
[0015]
The branched refrigerant pipe 12 is connected to a second expansion valve (second decompression mechanism) 20. The refrigerant pipe 21 is connected to the second expansion valve 20 by a refrigerant subcooling type ice heat storage and hot water heat storage. A combined heat storage tank 22 is connected.
The branched refrigerant pipe 13 is connected to the refrigerant pipe 21 via an electromagnetic on-off valve 13A.
[0016]
A refrigerant pipe 23 is connected to the heat storage tank 22, and the refrigerant pipe 23 is branched into three refrigerant pipes 24, 25 and 26. The branched refrigerant pipe 24 is connected between the electromagnetic on-off valve 14 and the first expansion valve 15 in the refrigerant pipe 11 via an electromagnetic on-off valve 27. Further, the branched refrigerant pipe 25 is connected between the indoor heat exchanger 17 and the electromagnetic on-off valve 19 in the refrigerant pipe 18 via an electromagnetic on-off valve 28. The branched refrigerant pipe 26 is connected between the electromagnetic on-off valve 19 and the compressor 1 in the refrigerant pipe 18 via an electromagnetic on-off valve 29.
[0017]
One end of the refrigerant pipe 30 is connected between the electromagnetic on-off valve 9 </ b> A and the electromagnetic on-off valve 9 in the refrigerant pipe 6, and the other end of the refrigerant pipe 30 is connected to the indoor heat exchanger by the electromagnetic on-off valve 19 in the refrigerant pipe 18. 17 side is connected. An electromagnetic opening / closing valve 31 is interposed in the refrigerant pipe 30.
One end of the refrigerant pipe 32 is connected between the electromagnetic on-off valve 9 and the outdoor heat exchanger 8 in the refrigerant pipe 6, and the other end of the refrigerant pipe 32 is connected to the compressor by the electromagnetic on-off valve 29 in the refrigerant pipe 26. 1 side is connected. An electromagnetic opening / closing valve 33 is interposed in the refrigerant pipe 32.
[0018]
One end of the refrigerant pipe 34 is connected between the compressor 1 and the electromagnetic on-off valve 2A in the refrigerant pipe 2, and the other end of the refrigerant pipe 34 is connected to the electromagnetic on-off valve 9A in the refrigerant pipe 6, the refrigerant pipe 6 and the like. Between the connection part 6A and the refrigerant pipe 30, it is connected as a connection part 6B. The refrigerant pipe 34 is provided with an electromagnetic on-off valve 34A.
One end of the refrigerant pipe 35 is connected to the connecting portion 6B, and the other end of the refrigerant pipe 35 is connected to the opposite side of the outdoor heat exchanger 8 from the electromagnetic on-off valve 10A in the refrigerant pipe 10. A third expansion valve (third decompression mechanism) 36 is interposed in the refrigerant pipe 35.
[0019]
Here, in FIG. 1, the part enclosed with the dashed-two dotted line, ie, the compressor 1, the hot water supply heat exchanger 3, the circulation pump 5, the outdoor heat exchanger 8, the air blower 7, the 1st expansion valve 15, indoor heat The exchanger 17, the blower 16, the second expansion valve 20, the heat storage tank 22, the third expansion valve 36, each refrigerant pipe, and each electromagnetic on-off valve are configured as a unit A. These devices and the refrigerant piping are accommodated in a housing B as schematically shown in FIG.
The conditioned air blown by the blower 16 is guided into the dwelling unit by the air supply duct C and returned by the return air duct D.
In the figure, F is a filter, and G and H are hot water supply heating pipes.
[0020]
The multi-function heat pump system configured as described above is controlled by the control means, and various operations are performed as follows.
Hereinafter, various operations will be described.
[0021]
(Ice heat storage operation)
This operation is usually performed at night in summer.
As shown in FIG. 3, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the second expansion valve 20, and the electromagnetic on-off valve 29 are opened, and other electromagnetic on-off valves and The expansion valve is closed, and the refrigerant is, as indicated by solid arrows, the compressor 1, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the outdoor heat exchanger 8, the electromagnetic on-off valve 10A, the second expansion valve 20, The heat storage tank 22, the electromagnetic on-off valve 29, and the compressor 1 are circulated in this order.
[0022]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the outdoor heat exchanger 8. The outdoor heat exchanger 8 functions as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through the outdoor heat exchanger 8, and is then discharged by the second expansion valve 20. The pressure is reduced to a low pressure two-phase state. Thereafter, the heat storage tank 22 functions as an evaporator, and the refrigerant evaporates while passing through the heat storage tank 22 to become low-pressure gas, while the heat storage tank 22 stores ice. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.
[0023]
In this operation, since the ice heat is stored using the nighttime power, the nighttime power can be used effectively.
[0024]
(Simultaneous operation of ice storage and hot water supply heating)
This operation is usually performed at night in summer.
As shown in FIG. 4, in this operation, the electromagnetic on-off valve 2A, the electromagnetic on-off valve 9A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the second expansion valve 20, and the electromagnetic on-off valve 29 are opened, The solenoid on-off valve and the expansion valve are closed, and as indicated by solid arrows, the refrigerant is the compressor 1, the electromagnetic on-off valve 2A, the hot water heat exchanger 3, the electromagnetic on-off valve 9A, the electromagnetic on-off valve 9, and the outdoor. The heat exchanger 8, the electromagnetic on-off valve 10A, the second expansion valve 20, the heat storage tank 22, the electromagnetic on-off valve 29, and the compressor 1 are circulated in this order.
[0025]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the hot water supply heat exchanger 3 where the circulating water from the electric water heater 4 circulated by the circulation pump 5 is heated to heat the hot water supply. And then passes through the outdoor heat exchanger 8. The hot water supply heat exchanger 3 and the outdoor heat exchanger 8 function as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through them. The pressure is reduced by the expansion valve 20 to a low pressure two-phase state. Thereafter, the heat storage tank 22 functions as an evaporator, and the refrigerant evaporates while passing through the heat storage tank 22 to become low-pressure gas, while the heat storage tank 22 stores ice. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.
[0026]
In this operation, since the ice heat is stored using the nighttime power, the nighttime power can be used effectively. Moreover, since the exhaust heat generated with the use of the heat storage tank 22 can be used for hot water heating of the hot water supply heat exchanger 3, energy saving and cost saving can be achieved.
[0027]
(Cooling operation)
This operation is usually performed in summer.
In the main operation, the cooling operation that is normally performed is performed.
As shown in FIG. 5, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the electromagnetic on-off valve 14, the first expansion valve 15, and the electromagnetic on-off valve 19 are opened, The electromagnetic on-off valve and the expansion valve are closed, and the refrigerant is the compressor 1, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the outdoor heat exchanger 8, the electromagnetic on-off valve 10A, the electromagnetic on-off as shown by the solid arrows. The valve 14, the first expansion valve 15, the indoor heat exchanger 17, the electromagnetic on-off valve 19, and the compressor 1 are circulated in this order.
[0028]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the outdoor heat exchanger 8. The outdoor heat exchanger 8 functions as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through the outdoor heat exchanger 8, and then the first expansion valve. The pressure is reduced by 15 to a low-pressure two-phase state. Thereafter, the indoor heat exchanger 17 functions as an evaporator, and the refrigerant evaporates while passing through the indoor heat exchanger 17 to become low-pressure gas. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.
[0029]
(Simultaneous cooling and hot water heating operation)
This operation is usually performed in summer.
As shown in FIG. 6, in this operation, the electromagnetic on-off valve 2A, the electromagnetic on-off valve 9A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the electromagnetic on-off valve 14, the first expansion valve 15 and the electromagnetic on-off valve 19 are opened. At the same time, the other electromagnetic on-off valves and expansion valves are closed, and the refrigerant is, as indicated by solid arrows, the compressor 1, the electromagnetic on-off valve 2A, the hot water heat exchanger 3, the electromagnetic on-off valve 9A, the electromagnetic The on-off valve 9, the outdoor heat exchanger 8, the electromagnetic on-off valve 10A, the electromagnetic on-off valve 14, the first expansion valve 15, the indoor heat exchanger 17, the electromagnetic on-off valve 19, and the compressor 1 are circulated in this order.
[0030]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the hot water supply heat exchanger 3 where the circulating water from the electric water heater 4 circulated by the circulation pump 5 is heated to heat the hot water supply. And then passes through the outdoor heat exchanger 8. The hot water supply heat exchanger 3 and the outdoor heat exchanger 8 function as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through them, The pressure is reduced by the expansion valve 15 to a low pressure two-phase state. Thereafter, the indoor heat exchanger 17 functions as an evaporator, and the refrigerant evaporates while passing through the indoor heat exchanger 17 to become low-pressure gas. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.
[0031]
In this operation, the exhaust heat generated in the indoor heat exchanger 20 can be used for hot water heating of the hot water supply heat exchanger 3, so that energy saving and cost saving can be achieved.
[0032]
(Cooling operation using ice storage)
This operation is usually performed during the peak power hours during the daytime in summer (usually around 1 pm to 4 pm).
As shown in FIG. 7, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the electromagnetic on-off valve 13A, the electromagnetic on-off valve 27, the first expansion valve 15 and the electromagnetic on-off valve 19 are opened. At the same time, the other electromagnetic on-off valves and expansion valves are closed, and as indicated by solid arrows, the refrigerant is the compressor 1, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the outdoor heat exchanger 8, the electromagnetic on-off. The valve 10A, the electromagnetic open / close valve 13A, the heat storage tank 22, the electromagnetic open / close valve 27, the first expansion valve 15, the indoor heat exchanger 17, the electromagnetic open / close valve 19 and the compressor 1 are circulated in this order.
[0033]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the outdoor heat exchanger 8 and the heat storage tank 22. The outdoor heat exchanger 8 and the heat storage tank 22 function as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through them, and then the first expansion valve 15. Is reduced to a low-pressure two-phase state. Thereafter, the indoor heat exchanger 17 functions as an evaporator, and the refrigerant evaporates while passing through the indoor heat exchanger 17 to become low-pressure gas. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.
[0034]
In this operation, since the refrigerant is condensed using the ice heat storage in the heat storage tank 22, the cooling capacity is improved, and the ice is stored by the nighttime electric power, so that the power peak can be cut.
[0035]
(Simultaneous operation with cooling and hot water supply using ice heat storage)
This operation is usually performed during the peak power hours during the daytime in summer (usually around 1 pm to 4 pm).
As shown in FIG. 8, in this operation, the electromagnetic on-off valve 2A, the electromagnetic on-off valve 9A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the electromagnetic on-off valve 13A, the electromagnetic on-off valve 27, the first expansion valve 15, and the electromagnetic on-off valve While the valve 19 is opened, the other electromagnetic on-off valves and expansion valves are closed, and the refrigerant is the compressor 1, the electromagnetic on-off valve 2A, the hot water supply heat exchanger 3, the electromagnetic, as indicated by solid arrows. On-off valve 9A, electromagnetic on-off valve 9, outdoor heat exchanger 8, electromagnetic on-off valve 10A, electromagnetic on-off valve 13A, heat storage tank 22, electromagnetic on-off valve 27, first expansion valve 15, indoor heat exchanger 17, electromagnetic on-off valve 19 and the compressor 1 are circulated in this order.
[0036]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the hot water supply heat exchanger 3 where the circulating water from the electric water heater 4 circulated by the circulation pump 5 is heated to heat the hot water supply. And then passes through the outdoor heat exchanger 8 and the heat storage tank 22. The hot water supply heat exchanger 3, the outdoor heat exchanger 8, and the heat storage tank 22 function as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through them. The pressure is reduced by the first expansion valve 15 to a low pressure two-phase state. Thereafter, the indoor heat exchanger 17 functions as an evaporator, and the refrigerant evaporates while passing through the indoor heat exchanger 17 to become low-pressure gas. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.
[0037]
In this operation, since the refrigerant is condensed using the ice heat storage in the heat storage tank 22, the cooling capacity is improved, and the ice is stored by the nighttime electric power, so that the power peak can be cut. In addition, since the exhaust heat generated in the indoor heat exchanger 17 can be used for hot water heating of the hot water supply heat exchanger 3, energy saving and cost saving can be achieved.
[0038]
(Hot water storage operation)
This operation is usually performed at night in winter.
As shown in FIG. 9, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the electromagnetic on-off valve 28, the second expansion valve 20, the electromagnetic on-off valve 10A, and the electromagnetic on-off valve 33 are opened, and others The electromagnetic on-off valve and the expansion valve are closed, and the refrigerant is, as indicated by solid arrows, the compressor 1, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the electromagnetic on-off valve 28, the heat storage tank 22, and the second expansion. The valve 20, the electromagnetic on-off valve 10 </ b> A, the outdoor heat exchanger 8, the electromagnetic on-off valve 33, and the compressor 1 are circulated in this order.
[0039]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the heat storage tank 20. The heat storage tank 22 functions as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through them, while hot water is stored in the heat storage tank 22. Thereafter, the refrigerant is decompressed by the second expansion valve 20 to be in a low pressure two-phase state. Thereafter, the outdoor heat exchanger 8 functions as an evaporator, and the refrigerant evaporates while passing through the outdoor heat exchanger 8 to become a low-pressure gas, and then returns to the suction side of the compressor 1.
[0040]
In this operation, the hot water is stored using the nighttime power, so that the nighttime power can be used effectively. Further, heat is collected by the outdoor heat exchanger 8 using outside air as a heat source, and hot water is stored using this heat, so that energy saving and cost saving can be achieved.
[0041]
(Heating operation using outside air as a heat source)
This operation is usually performed during the winter daytime.
In this operation, it operates as a heat pump using outside air as a heat source.
As shown in FIG. 10, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the first expansion valve 15, the electromagnetic on-off valve 14, the electromagnetic on-off valve 10A, and the electromagnetic on-off valve 33 are opened, and others The electromagnetic on-off valve and the expansion valve are closed, and the refrigerant is, as indicated by solid arrows, the compressor 1, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the indoor heat exchanger 17, the first expansion valve 15, The electromagnetic on-off valve 14, the electromagnetic on-off valve 10A, the outdoor heat exchanger 8, the electromagnetic on-off valve 33, and the compressor 1 are circulated in this order.
[0042]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the indoor heat exchanger 17. The indoor heat exchanger 17 functions as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through the indoor heat exchanger 17. Thereafter, the refrigerant is decompressed by the first expansion valve 15 to be in a low-pressure two-phase state. Thereafter, the outdoor heat exchanger 8 functions as an evaporator, and the refrigerant evaporates while passing through the outdoor heat exchanger 8 to become a low-pressure gas, and then returns to the suction side of the compressor 1.
[0043]
(Heating operation using hot water storage)
This operation is usually operated at the peak of heating in the morning in winter.
As shown in FIG. 11, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the first expansion valve 15, the electromagnetic on-off valve 14, the electromagnetic on-off valve 13A, and the electromagnetic on-off valve 29 are opened, and others The electromagnetic on-off valve and the expansion valve are closed, and the refrigerant is, as indicated by solid arrows, the compressor 1, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the indoor heat exchanger 17, the first expansion valve 15, The electromagnetic on-off valve 14, the electromagnetic on-off valve 13A, the heat storage tank 22, the electromagnetic on-off valve 29, and the compressor 1 are circulated in this order.
[0044]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the indoor heat exchanger 17. The indoor heat exchanger 17 functions as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through the indoor heat exchanger 17. Thereafter, the refrigerant is decompressed by the first expansion valve 15 to be in a low-pressure two-phase state. Thereafter, the heat storage tank 22 functions as an evaporator, and the refrigerant evaporates while passing through them to be a low-pressure gas, and then returned to the suction side of the compressor 1.
[0045]
In this operation, the refrigerant is evaporated using the hot water heat storage in the heat storage tank 22 having a temperature higher than the outside air temperature, so that the heating capacity is improved and the heat is stored by night electricity, so the morning power peak cut Can be achieved.
[0046]
(Hot water heating operation)
Hot water heating by the heat pump in the actual operation is usually used in the middle season.
As shown in FIG. 12, in this operation, the electromagnetic on-off valve 2A, the electromagnetic on-off valve 9A, the third expansion valve 36, the electromagnetic on-off valve 10A and the electromagnetic on-off valve 33 are opened, and other electromagnetic on-off valves and The expansion valve is closed, and the refrigerant is the compressor 1, the electromagnetic on-off valve 2A, the hot water heat exchanger 3, the electromagnetic on-off valve 9A, the third expansion valve 36, and the electromagnetic on-off valve 10A, as indicated by solid arrows. The outdoor heat exchanger 8, the electromagnetic on-off valve 33, and the compressor 1 are circulated in this order.
[0047]
During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the hot water supply heat exchanger 3 where the circulating water from the electric water heater 4 circulated by the circulation pump 5 is heated to heat the hot water supply. I do. The hot water supply heat exchanger 3 functions as a condenser, and the high-temperature and high-pressure refrigerant gas condenses into a high-pressure refrigerant liquid while passing through them. Thereafter, the refrigerant is decompressed by the third expansion valve 36 to be in a low-pressure two-phase state. Thereafter, the outdoor heat exchanger 8 functions as an evaporator, and the refrigerant evaporates while passing through the outdoor heat exchanger 8 to become a low-pressure gas, and then returns to the suction side of the compressor 1.
[0048]
In such a multi-functional heat pump system, ice storage operation, ice storage and hot water heating simultaneous operation, cooling operation, cooling and hot water heating simultaneous operation, ice storage using cooling operation, ice storage using cooling and hot water heating simultaneous operation, Since it is possible to perform warm water heat storage operation, heating operation using the outside air as a heat source, warm water heat storage utilization heating operation and hot water supply heating operation, it is possible to effectively use night electricity using ice heat storage and hot water heat storage, Therefore, it becomes possible to reduce the running cost by leveling the power load at the peak of the air conditioning load and using cheaper power. Moreover, since hot water can be heated using ice heat storage and exhaust heat at the time of cooling, energy saving and cost saving can be achieved.
[0049]
Furthermore, the compressor 1, the hot water supply heat exchanger 3, the circulation pump 5, the outdoor heat exchanger 8, the blower 7, the first expansion valve 15, the indoor heat exchanger 17, the blower 16, the second expansion valve 20, and the heat storage. Since the tank 22, the third expansion valve 36, each refrigerant pipe, and each electromagnetic on-off valve are housed in the casing B and unitized as a unit A, it is necessary to provide a refrigerant pipe at all outside. Therefore, it is possible to prevent the refrigerant from leaking to the outside of the unit A during piping work during installation or repair.
[0050]
In addition, since the electric water heater 4 is used as a hot water storage tank, it is possible to perform hot water supply heating with an electric heater as the electric water heater and also perform hot water supply by this.
[0051]
【The invention's effect】
As described above, according to the multi-function heat pump system according to claim 1, ice storage operation, ice storage / hot water heating simultaneous operation, cooling operation, cooling / hot water heating simultaneous operation, ice storage utilizing cooling operation, ice storage Use cooling and hot water heating simultaneous operation, warm water heat storage operation, heating operation using the outside air as a heat source, heating water heating utilization heating operation and hot water supply heating operation can be performed, so that night electricity can be effectively utilized using ice heat storage and hot water heat storage Since it can be used, it is possible to reduce the running cost by leveling the power load at the peak of the air conditioning load and using cheaper power, and also heating the hot water supply using ice heat storage and exhaust heat during cooling Therefore, there is an effect that energy saving and cost saving can be achieved.
[0052]
Moreover, according to the multifunction heat pump system of Claim 2, a compressor, an outdoor heat exchanger, a pressure reduction mechanism, an indoor heat exchanger, a heat exchanger for hot water supply, a second pressure reduction mechanism, a heat storage tank, and a third Since the decompression mechanism is unitized and integrated, the refrigerant piping that circulates the refrigerant between them can be stored in the unit, and there is no need to install any refrigerant piping outside. It is possible to prevent the refrigerant from leaking outside the unit during the piping work.
[0053]
Furthermore, according to the multifunction heat pump system of the third aspect, since the electric water heater is a hot water storage tank, there is an advantage that the hot water heating by the electric water heater can be performed together.
[Brief description of the drawings]
FIG. 1 is a refrigerant circuit diagram showing an embodiment of a multifunction heat pump system of the present invention.
FIG. 2 is a schematic perspective view showing a unit according to the present invention.
FIG. 3 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram at the time of ice heat storage operation.
FIG. 4 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram during simultaneous operation of ice heat storage and hot water supply heating.
FIG. 5 is a diagram showing an embodiment of the multi-function heat pump system of the present invention, and is a refrigerant circuit diagram during cooling operation.
FIG. 6 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram during simultaneous cooling and hot water heating operation.
FIG. 7 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram at the time of cooling operation using ice storage heat.
FIG. 8 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram at the time of simultaneous cooling and hot water supply heating operation using ice heat storage.
FIG. 9 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram during hot water heat storage operation.
FIG. 10 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram during heating operation using outside air as a heat source.
FIG. 11 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram at the time of heating operation using hot water heat storage.
FIG. 12 is a diagram showing an embodiment of the multifunction heat pump system of the present invention, and is a refrigerant circuit diagram during hot water supply heating operation.
[Explanation of symbols]
1 Compressor
3 Heat exchanger for hot water supply
4 Electric water heater (hot water tank)
5 Circulation pump
8 Outdoor heat exchanger
15 1st expansion valve (1st pressure reduction mechanism)
17 Indoor heat exchanger
20 Second expansion valve (second decompression mechanism)
22 Heat storage tank
36 Third expansion valve (third decompression mechanism)

Claims

A compressor, an outdoor heat exchanger, a first pressure reduction mechanism, and an indoor heat exchanger are connected in an annular shape in this order, and hot water heating is performed by heating circulating water from a hot water tank circulated by a circulation pump. A heat exchanger, a second pressure reducing mechanism, a heat storage tank for both ice heat storage and hot water heat storage, and a third pressure reducing mechanism, and a refrigerant is circulated between them; and
During the ice heat storage operation, the refrigerant is circulated in the order of the compressor, the outdoor heat exchanger, the second pressure reducing mechanism, the heat storage tank, and the compressor.
During simultaneous operation of ice storage and hot water heating, the refrigerant is circulated in the order of the compressor, the hot water heat exchanger, the outdoor heat exchanger, the second decompression mechanism, the heat storage tank, and the compressor.
During cooling operation, the refrigerant is circulated in the order of the compressor, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor.
During cooling and hot water heating simultaneous operation, the refrigerant is circulated in the order of the compressor, the hot water heat exchanger, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor.
During cooling operation using ice heat storage, the refrigerant is circulated in the order of the compressor, the outdoor heat exchanger, the heat storage tank, the first decompression mechanism, the indoor heat exchanger, and the compressor.
During simultaneous operation of cooling and hot water supply using ice heat storage, the refrigerant is the compressor, the heat exchanger for hot water supply, the outdoor heat exchanger, the heat storage tank, the first pressure reducing mechanism, the indoor heat exchanger, and the above Circulated in the order of the compressor,
During the hot water heat storage operation, the refrigerant is circulated in the order of the compressor, the heat storage tank, the second pressure reducing mechanism, the outdoor heat exchanger, and the compressor.
During heating operation using outside air as a heat source, the refrigerant is circulated in the order of the compressor, the indoor heat exchanger, the first decompression mechanism, the outdoor heat exchanger, and the compressor.
During heating operation using hot water heat storage, the refrigerant is circulated in the order of the compressor, the indoor heat exchanger, the first pressure reducing mechanism, the heat storage tank, and the compressor.
In the hot water supply heating operation, the refrigerant is circulated in the order of the compressor, the hot water supply heat exchanger, the third decompression mechanism, the outdoor heat exchanger, and the compressor. .

The compressor, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, the hot water heat exchanger, the second pressure reducing mechanism, the heat storage tank, and the third pressure reducing mechanism are unit The multifunction heat pump system according to claim 1, wherein the multifunction heat pump system is configured.

The multifunctional heat pump system according to claim 1 or 2, wherein the hot water tank is an electric water heater.