JP2011141068A

JP2011141068A - Bath device

Info

Publication number: JP2011141068A
Application number: JP2010001313A
Authority: JP
Inventors: Akihiro Ohira; 晃寛大平; Teruyuki Yamada; 照之山田
Original assignee: Corona Corp
Current assignee: Corona Corp
Priority date: 2010-01-06
Filing date: 2010-01-06
Publication date: 2011-07-21

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bath device achieving reduction in the size of a heat pump unit. <P>SOLUTION: An upper heat exchanger 9 is arranged in a position opposing to a bath heat exchanger 22 on the upper side of a hot water storage tank 2, and a lower heat exchanger 10 is arranged on the lower side within the hot water storage tank 2. Since a refrigerant from a compressor 11 of the heat pump unit 3 is supplied to the upper heat exchanger 9 and the lower heat exchanger 10 and hot water within the hot water storage tank 2 is heated, the necessity of a conventional refrigerant-water heat exchanger and heat pump circulating pump can be eliminated, and thus, the size of the heat pump unit 3 can be extremely reduced. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、風呂追い焚き付きの風呂装置に関するものである。 The present invention relates to a bath apparatus with a bath chase.

従来よりこの種のものに於いては、時間帯別契約電力の電力単価が安価な深夜時間帯に湯水を沸き上げて貯湯し、この貯湯した湯水を給湯や風呂に用いるもので、湯水を貯湯する貯湯タンク１０１を備えた貯湯タンクユニット１０２と、貯湯タンク１０１内の湯水を加熱する加熱手段としてのヒートポンプユニット１０３を備え、前記貯湯タンク１０１内の上部には、浴槽１０４の湯水を加熱するためのステンレス製の蛇管よりなる風呂熱交換器１０５が配置されていると共に、この風呂熱交換器１０５には風呂往き管１０６および風呂循環ポンプ１０７を備えた風呂戻り管１０８よりなる風呂循環回路１０９が接続されて浴槽１０４の湯水が循環可能にされ、浴槽１０４内の湯水が貯湯タンク１０１内の高温水により加熱されて保温あるいは追い焚きが行われるものである。 Conventionally, in this type, hot water is boiled and stored in the midnight hours when the unit price of contracted power by time is low, and the stored hot water is used for hot water and baths. A hot water storage tank unit 102 having a hot water storage tank 101 and a heat pump unit 103 as a heating means for heating the hot water in the hot water storage tank 101 are provided, and the hot water in the bathtub 104 is heated in the upper part of the hot water storage tank 101. A bath heat exchanger 105 made of a stainless steel serpentine tube is disposed, and a bath circulation circuit 109 made up of a bath return pipe 108 having a bath return pipe 106 and a bath circulation pump 107 is provided in the bath heat exchanger 105. The hot water in the bathtub 104 is circulated so that the hot water in the bathtub 104 is heated by the high-temperature water in the hot water storage tank 101 to keep warm. One in which Reheating is performed.

そして浴槽１０１への風呂自動運転は、風呂リモコン１１０の風呂自動スイッチ１１１が操作されると、湯張り弁１１２が開成され給湯混合弁１１３で風呂設定温度に混合した温水を浴槽１０４に湯張りし、そして風呂流量カウンタ１１４が浴槽１０４の満量をカウントすることで湯張りを終了すると共に、風呂循環ポンプ１０７を駆動して、湯張りされた浴槽水を風呂循環回路１０９を循環させ風呂熱交換器１０５で設定温度まで追い焚きして風呂自動運転が終了されるものである。 In the automatic bath operation to the bathtub 101, when the automatic bath switch 111 of the bath remote controller 110 is operated, the hot water filling valve 112 is opened and hot water mixed with the bath set temperature is filled in the bathtub 104 by the hot water supply mixing valve 113. Then, the bath flow counter 114 counts the full amount of the bathtub 104 and finishes the hot water filling, and the bath circulation pump 107 is driven to circulate the hot water bath water through the bath circulation circuit 109 to exchange the heat of the bath. The bath 105 is driven up to the set temperature by the vessel 105 and the bath automatic operation is terminated.

また、追い焚き運転は、風呂リモコン１１０の追い焚きスイッチ１１５を押圧すると、風呂循環ポンプ１０７が駆動開始し、浴槽１０４内の浴槽水を風呂往き管１０６から風呂熱交換器１０５へと送り、ここで貯湯タンク１０１内上部の高温水との熱交換で浴槽水を加熱して風呂戻り管１０８で浴槽１０４へ戻し、風呂戻り温度センサ１１６が風呂設定温度を検出すれば、風呂循環ポンプ１０７を停止して追い焚きは終了となるものである。
（例えば、特許文献１参照）
特開２００９−９７８１５号公報 Further, in the reheating operation, when the reheating switch 115 of the bath remote controller 110 is pressed, the bath circulation pump 107 starts driving, and the bath water in the bathtub 104 is sent from the bath outlet pipe 106 to the bath heat exchanger 105, where In the hot water storage tank 101, the bath water is heated by heat exchange with the high temperature water in the upper part and returned to the bathtub 104 by the bath return pipe 108. When the bath return temperature sensor 116 detects the bath set temperature, the bath circulation pump 107 is stopped. The chasing ends.
(For example, see Patent Document 1)
JP 2009-97815 A

ところでこの従来のものでは、貯湯タンクユニットと、ヒートポンプユニットを備えているが、高層マンション等の集合住宅においては、風呂装置を設置するスペースを小さくすることが求められ、そのため貯湯タンクユニットとヒートポンプユニットを一体化したものがあるが、従来の構成では一体化しても小型化には限界があり、更に小さくすることは困難であった。 By the way, in this conventional one, a hot water storage tank unit and a heat pump unit are provided. However, in an apartment house such as a high-rise apartment building, it is required to reduce a space for installing a bath device. For this reason, a hot water storage tank unit and a heat pump unit are required. However, there is a limit to downsizing even if they are integrated, and it is difficult to further reduce the size.

その場合、貯湯タンクユニットは貯湯量をどのくらいにするかで大きさが決まってしまうので単純に小さくすることができず、ヒートポンプユニットは十分な熱交換を行うために凝縮器としての冷媒−水熱交換器を小さくすることができず、又貯湯タンク内の湯水をヒーポン往き管およびヒーポン戻り管を介して冷媒−水熱交換器に循環させるヒーポン循環ポンプが必要で、そのヒーポン循環ポンプのためのスペースも必要であった。 In that case, the size of the hot water storage tank unit is determined depending on how much hot water is stored, so it cannot be simply reduced, and the heat pump unit uses a refrigerant-water heat as a condenser to perform sufficient heat exchange. The heat exchanger cannot be made small, and a heat pump circulating pump for circulating hot water in the hot water storage tank to the refrigerant-water heat exchanger via the heat pump forward pipe and the heat pump return pipe is required. Space was also needed.

この発明はこの点に着目し上記課題を解決する為、特にその構成を請求項１では、湯水を貯湯する貯湯タンクを備えた貯湯タンクユニットと、前記貯湯タンク内の湯水を加熱するヒートポンプユニットとを備え、前記貯湯タンクの上端には出湯管が接続されると共に下端には給水管が接続され、貯湯タンク内の上部には浴槽の湯水を加熱するための風呂熱交換器が設けられ、該風呂熱交換器には風呂往き管および風呂循環ポンプを備えた風呂戻り管よりなる風呂循環回路が接続された風呂装置に於いて、前記貯湯タンク内の上部で風呂熱交換器と対向する位置に上部熱交換器が配置されると共に、貯湯タンク内の下部には下部熱交換器が配置され、前記ヒートポンプユニットは圧縮機と、膨張弁と、蒸発器とを有し、前記圧縮機からの冷媒を上部熱交換器往き管と下部熱交換器往き管を介して上部熱交換器と下部熱交換器とに供給し、上部熱交換器と下部熱交換器を通過した冷媒を上部熱交換器戻り管と下部熱交換器戻り管を介して膨張弁に戻すヒートポンプ回路を構成するものである。 In order to solve the above-mentioned problems by focusing attention on this point, the present invention is particularly configured as claimed in claim 1. A hot water storage tank unit having a hot water storage tank for storing hot water and a heat pump unit for heating the hot water in the hot water storage tank are provided. A hot water storage pipe is connected to the upper end of the hot water storage tank and a water supply pipe is connected to the lower end of the hot water storage tank, and a bath heat exchanger for heating hot water in the bathtub is provided at the upper part of the hot water storage tank. The bath heat exchanger is connected to a bath circulation circuit consisting of a bath return pipe and a bath return pipe equipped with a bath circulation pump. The bath heat exchanger is located at a position facing the bath heat exchanger in the upper part of the hot water storage tank. An upper heat exchanger is disposed, and a lower heat exchanger is disposed in a lower portion of the hot water storage tank. The heat pump unit includes a compressor, an expansion valve, and an evaporator, and the refrigerant from the compressor The Supply heat to the upper heat exchanger and lower heat exchanger via the upper heat exchanger and lower heat exchanger, and the refrigerant that has passed through the upper heat exchanger and lower heat exchanger to the upper heat exchanger return pipe And a heat pump circuit for returning to the expansion valve via the lower heat exchanger return pipe.

又請求項２に係る風呂装置では、特にその構成を請求項１において、前記圧縮機からの冷媒はヒーポン往き三方弁を介して上部熱交換器往き管と下部熱交換器往き管とに供給されると共に、上部熱交換器と下部熱交換器を通過した冷媒はヒーポン戻り三方弁を介して膨張弁に戻り、貯湯タンク内の湯水を沸き上げる時はヒーポン往き三方弁とヒーポン戻り三方弁を動作させて圧縮機からの冷媒を上部熱交換器と下部熱交換器に供給し、貯湯タンク内の上部の湯水の温度が所定温度まで上昇したらヒーポン往き三方弁とヒーポン戻り三方弁を動作させて圧縮機からの冷媒を下部熱交換器のみに供給し、その後貯湯タンク内の下部の湯水の温度が所定温度まで上昇したら沸き上げを停止するものである。 Further, in the bath apparatus according to claim 2, in particular, in the structure of claim 1, the refrigerant from the compressor is supplied to the upper heat exchanger outgoing pipe and the lower heat exchanger outgoing pipe via the heat pump forward three-way valve. At the same time, the refrigerant that has passed through the upper and lower heat exchangers returns to the expansion valve via the heat-pump return three-way valve. The refrigerant from the compressor is supplied to the upper heat exchanger and the lower heat exchanger, and when the temperature of the hot water in the upper part of the hot water storage tank rises to a predetermined temperature, the heat pump forward three-way valve and the heat pump return three-way valve are operated to perform compression. The refrigerant from the machine is supplied only to the lower heat exchanger, and then the boiling is stopped when the temperature of the hot water in the lower part of the hot water storage tank rises to a predetermined temperature.

又請求項３に係る風呂装置では、特にその構成を請求項１において、前記圧縮機からの冷媒は上部熱交換器往き管と下部熱交換器往き管とに供給されると共に、前記膨張弁は上部熱交換器用膨張弁と下部熱交換器用膨張弁とからなり、上部熱交換器を通過した冷媒は上部熱交換器用膨張弁に戻り、下部熱交換器熱交換器を通過した冷媒は下部熱交換器用膨張弁に戻り、貯湯タンク内の湯水を沸き上げる時は上部熱交換器用膨張弁と下部熱交換器用膨張弁を動作させて圧縮機からの冷媒を上部熱交換器と下部熱交換器に供給し、貯湯タンク内の上部の湯水の温度が所定温度まで上昇したら上部熱交換器用膨張弁を動作させて圧縮機からの冷媒を下部熱交換器のみに供給し、その後貯湯タンク内の下部の湯水の温度が所定温度まで上昇したら沸き上げを停止するものである。 Further, in the bath apparatus according to claim 3, in particular, in the structure of claim 1, the refrigerant from the compressor is supplied to the upper heat exchanger outgoing pipe and the lower heat exchanger outgoing pipe, and the expansion valve is It consists of an expansion valve for the upper heat exchanger and an expansion valve for the lower heat exchanger. The refrigerant that has passed through the upper heat exchanger returns to the expansion valve for the upper heat exchanger, and the refrigerant that has passed through the lower heat exchanger heat exchanger When returning to the expansion valve for the heater, when boiling the hot water in the hot water storage tank, the expansion valve for the upper heat exchanger and the expansion valve for the lower heat exchanger are operated to supply refrigerant from the compressor to the upper heat exchanger and the lower heat exchanger. When the temperature of the upper hot water in the hot water storage tank rises to a predetermined temperature, the upper heat exchanger expansion valve is operated to supply the refrigerant from the compressor only to the lower heat exchanger, and then the lower hot water in the hot water storage tank. Boil when the temperature rises to the specified temperature It is intended to stop the under.

又請求項４に係る風呂装置では、特にその構成を請求項２又は請求項３において、風呂循環回路により浴槽内の湯水を追い焚きする時に、貯湯タンク内の風呂熱交換器の周辺の湯水の温度が所定温度以下の時、圧縮機からの冷媒を上部熱交換器のみに供給し、貯湯タンク内の風呂熱交換器の周辺の湯水の温度が所定温度以上になった時、上部熱交換器への圧縮機からの冷媒の供給を停止するものである。 Further, in the bath apparatus according to claim 4, in particular, when the hot water in the bathtub is chased by the bath circulation circuit according to claim 2 or claim 3, the hot water around the bath heat exchanger in the hot water storage tank is configured. When the temperature is below the predetermined temperature, supply the refrigerant from the compressor only to the upper heat exchanger, and when the temperature of the hot water around the bath heat exchanger in the hot water storage tank exceeds the predetermined temperature, the upper heat exchanger The supply of refrigerant from the compressor is stopped.

この発明の請求項１によれば、貯湯タンク内の上部で風呂熱交換器と対向する位置に上部熱交換器が配置されると共に、貯湯タンク内の下部には下部熱交換器を配置し、ヒートポンプユニットの圧縮機からの冷媒を上部熱交換器と下部熱交換器とに供給して貯湯タンク内の湯水を加熱するので、従来の冷媒−水熱交換器及びヒーポン循環ポンプを不要とすることが出来、それによりヒートポンプユニットを非常に小さくすることができるものである。 According to claim 1 of the present invention, the upper heat exchanger is disposed at a position facing the bath heat exchanger in the upper part of the hot water storage tank, and the lower heat exchanger is disposed in the lower part of the hot water storage tank, Since the refrigerant from the compressor of the heat pump unit is supplied to the upper heat exchanger and the lower heat exchanger to heat the hot water in the hot water storage tank, the conventional refrigerant-water heat exchanger and heat pump circulation pump are not required. It is possible to make the heat pump unit very small.

又本発明の請求項２に記載の風呂装置によれば、前記圧縮機からの冷媒はヒーポン往き三方弁を介して上部熱交換器往き管と下部熱交換器往き管とに供給されると共に、上部熱交換器と下部熱交換器を通過した冷媒はヒーポン戻り三方弁を介して膨張弁に戻り、貯湯タンク内の湯水を沸き上げる時はヒーポン往き三方弁とヒーポン戻り三方弁を動作させて圧縮機からの冷媒を上部熱交換器と下部熱交換器に供給し、貯湯タンク内の上部の湯水の温度が所定温度まで上昇したらヒーポン往き三方弁とヒーポン戻り三方弁を動作させて圧縮機からの冷媒を下部熱交換器のみに供給し、その後貯湯タンク内の下部の湯水の温度が所定温度まで上昇したら沸き上げを停止するので、三方弁を二つ設けることで従来の冷媒−水熱交換器及びヒーポン循環ポンプを不要とすることが出来、それによりヒートポンプユニットを非常に小さくすることができるとともに、貯湯タンク内の湯水を全量沸き上げる時は貯湯タンク内の湯水を上下から加熱して沸き上げ時間を短縮し、貯湯タンク内の対流により先に貯湯タンク上部の湯水が高温になるので、その状態になったら下部熱交換器のみに冷媒を供給して、貯湯タンク下部の湯水も短時間に高温にすることが出来、又、貯湯タンク下部の湯水を直接加熱するので、貯湯タンク下部に高温とならない死水を少なくすることができるものである。 Moreover, according to the bath apparatus according to claim 2 of the present invention, the refrigerant from the compressor is supplied to the upper heat exchanger forward pipe and the lower heat exchanger forward pipe through the heat pump forward three-way valve, The refrigerant that has passed through the upper heat exchanger and the lower heat exchanger returns to the expansion valve via the heat pump return three-way valve. The refrigerant from the compressor is supplied to the upper heat exchanger and the lower heat exchanger, and when the temperature of the upper hot water in the hot water storage tank rises to the specified temperature, the heat pump forward three-way valve and the heat pump return three-way valve are operated to Since the refrigerant is supplied only to the lower heat exchanger and then the boiling is stopped when the temperature of the lower hot water in the hot water storage tank rises to a predetermined temperature, the conventional refrigerant-water heat exchanger is provided by providing two three-way valves. And Heaton circulation The pump can be made very small, and the heat pump unit can be made very small. When boiling all the hot water in the hot water tank, the hot water in the hot water tank is heated from above and below to shorten the boiling time. However, since the hot water in the upper part of the hot water tank first becomes hot due to the convection in the hot water tank, the refrigerant is supplied only to the lower heat exchanger, and the hot water in the lower part of the hot water tank is also made hot in a short time. In addition, since the hot water in the lower part of the hot water storage tank is directly heated, dead water that does not reach a high temperature in the lower part of the hot water storage tank can be reduced.

又本発明の請求項３に記載の風呂装置によれば、前記圧縮機からの冷媒は上部熱交換器往き管と下部熱交換器往き管とに供給されると共に、前記膨張弁は上部熱交換器用膨張弁と下部熱交換器用膨張弁とからなり、上部熱交換器を通過した冷媒は上部熱交換器用膨張弁に戻り、下部熱交換器熱交換器を通過した冷媒は下部熱交換器用膨張弁に戻り、貯湯タンク内の湯水を沸き上げる時は上部熱交換器用膨張弁と下部熱交換器用膨張弁を動作させて圧縮機からの冷媒を上部熱交換器と下部熱交換器に供給し、貯湯タンク内の上部の湯水の温度が所定温度まで上昇したら上部熱交換器用膨張弁を動作させて圧縮機からの冷媒を下部熱交換器のみに供給し、その後貯湯タンク内の下部の湯水の温度が所定温度まで上昇したら沸き上げを停止するので、膨張弁が上部熱交換器用膨張弁と下部熱交換器用膨張弁の二つからなることで、従来の冷媒−水熱交換器及びヒーポン循環ポンプを不要とすることが出来、それによりヒートポンプユニットを非常に小さくすることができるとともに、貯湯タンク内の湯水を全量沸き上げる時は貯湯タンク内の湯水を上下から加熱して沸き上げ時間を短縮し、貯湯タンク内の対流により先に貯湯タンク上部の湯水が高温になるので、その状態になったら下部熱交換器のみに冷媒を供給して、貯湯タンク下部の湯水も短時間に高温にすることが出来、又、貯湯タンク下部の湯水を直接加熱するので、貯湯タンク下部に高温とならない死水を少なくすることができるものである。 According to the bath apparatus of the third aspect of the present invention, the refrigerant from the compressor is supplied to the upper heat exchanger outgoing pipe and the lower heat exchanger outgoing pipe, and the expansion valve is supplied to the upper heat exchanger. The refrigerant that has passed through the upper heat exchanger is returned to the expansion valve for the upper heat exchanger, and the refrigerant that has passed through the lower heat exchanger heat exchanger is the expansion valve for the lower heat exchanger. When boiling the hot water in the hot water storage tank, the upper heat exchanger expansion valve and the lower heat exchanger expansion valve are operated to supply refrigerant from the compressor to the upper heat exchanger and lower heat exchanger. When the temperature of the hot water in the upper part of the tank rises to the specified temperature, the upper heat exchanger expansion valve is operated to supply the refrigerant from the compressor only to the lower heat exchanger, and then the temperature of the lower hot water in the hot water storage tank When it rises to the specified temperature, it stops boiling. Since the expansion valve consists of two expansion valves for the upper heat exchanger and the lower heat exchanger, the conventional refrigerant-water heat exchanger and heat pump circulation pump can be dispensed with. When boiling all of the hot water in the hot water tank, the hot water in the hot water tank is heated from above and below to shorten the boiling time. When the temperature becomes high, the refrigerant can be supplied only to the lower heat exchanger, so that the hot water in the lower part of the hot water tank can be quickly heated, and the hot water in the lower part of the hot water tank is directly heated. Therefore, it is possible to reduce dead water that does not become hot at the bottom of the hot water storage tank.

又本発明の請求項４に記載の風呂装置によれば、風呂循環回路により浴槽内の湯水を追い焚きする時に、貯湯タンク内の風呂熱交換器の周辺の湯水の温度が所定温度以下の時、圧縮機からの冷媒を上部熱交換器のみに供給し、貯湯タンク内の風呂熱交換器の周辺の湯水の温度が所定温度以上になった時、上部熱交換器への圧縮機からの冷媒の供給を停止するので、浴槽内の湯水を追い焚きする時に、貯湯タンク内の風呂熱交換器の周辺の湯水の温度が低くて風呂循環回路により加熱された浴槽の湯水が風呂設定温度未満となった時、貯湯タンク内の風呂熱交換器の周辺の湯水を直接上部熱交換器で加熱するので、貯湯タンク内の風呂熱交換器の周辺の湯水を短時間で高温に加熱することが出来、それにより貯湯タンク内の風呂熱交換器の周辺の湯水の温度が低くても、浴槽内の湯水の追い焚きを短時間に行うことができるものである。 According to the fourth aspect of the present invention, when the hot water in the bathtub is chased by the bath circulation circuit, the temperature of the hot water around the bath heat exchanger in the hot water storage tank is below a predetermined temperature. When the refrigerant from the compressor is supplied only to the upper heat exchanger and the temperature of the hot water around the bath heat exchanger in the hot water storage tank exceeds the predetermined temperature, the refrigerant from the compressor to the upper heat exchanger When the hot water in the bathtub is chased, the temperature of the hot water around the bath heat exchanger in the hot water storage tank is low and the hot water in the bathtub heated by the bath circulation circuit is less than the bath set temperature. The hot water around the bath heat exchanger in the hot water tank is directly heated by the upper heat exchanger, so the hot water around the bath heat exchanger in the hot water tank can be heated to a high temperature in a short time. Around the bath heat exchanger in the hot water storage tank Even if the temperature of hot water is low, in which can be performed in a short time hot water for reheating in the bathtub.

この発明一実施例を付した風呂装置の概略構成図。The schematic block diagram of the bath apparatus which attached | subjected this Example of this invention. 他の実施例を付した風呂装置の概略構成図。The schematic block diagram of the bath apparatus which attached the other Example. 従来の風呂装置の概略構成図。The schematic block diagram of the conventional bath apparatus.

次に、本発明に係る発明の一実施形態を図面に基づいて説明する。
この風呂装置は、時間帯別契約電力の電力単価が安価な深夜時間帯に湯水を沸き上げて貯湯し、この貯湯した湯水を給湯や風呂に用いるもので、１は湯水を貯湯する貯湯タンク２を備えた貯湯タンクユニット、３は貯湯タンク内の湯水を加熱する加熱手段としてのヒートポンプユニット、４は台所や洗面所等に設けられた給湯栓、５はこの風呂装置を遠隔操作する浴室設置の風呂リモコン、６は浴槽である。 Next, an embodiment of the present invention will be described with reference to the drawings.
This bath apparatus heats and stores hot water in the midnight hours when the unit price of contracted power by time is low, and uses the stored hot water for hot water or bath. 1 is a hot water storage tank 2 for storing hot water. 3 is a heat pump unit as a heating means for heating the hot water in the hot water storage tank, 4 is a hot water tap provided in a kitchen or a washroom, and 5 is a bathroom installation for remotely operating this bath device. A bath remote control, 6 is a bathtub.

前記貯湯タンクユニット１の貯湯タンク２は、上端に出湯管７と、下端に給水管８とが接続され、又貯湯タンク２内の上部には上部熱交換器９が配置されると共に、貯湯タンク２内の下部には下部熱交換器１０が配置されているものである。 A hot water storage tank 2 of the hot water storage tank unit 1 has a hot water discharge pipe 7 connected to the upper end and a water supply pipe 8 connected to the lower end, and an upper heat exchanger 9 is disposed in the upper part of the hot water storage tank 2. A lower heat exchanger 10 is disposed in the lower part of 2.

前記ヒートポンプユニット３は、圧縮機１１と、電子膨張弁１２と強制空冷式の蒸発器１３とを有し、前記圧縮機１１により超臨界圧力まで加圧された高温高圧の自然冷媒は、ヒーポン往き三方弁１４を通って上部熱交換器往き管１５と下部熱交換器往き管１６に流れ、上部熱交換器９で貯湯タンク２内の湯水と熱交換した自然冷媒は、上部熱交換器戻り管１７からヒーポン戻り三方弁１８を通って電子膨張弁１２に戻ると共に、下部熱交換器１０で貯湯タンク２内の湯水と熱交換した二酸化炭素冷媒は、下部熱交換器戻り管１９を通って電子膨張弁１２に戻ることでヒートポンプ回路２０を構成し、このヒートポンプ回路２０の駆動を制御するヒーポン制御部２１を備えたものである。 The heat pump unit 3 includes a compressor 11, an electronic expansion valve 12 and a forced air-cooled evaporator 13, and high-temperature and high-pressure natural refrigerant pressurized to a supercritical pressure by the compressor 11 The natural refrigerant which flows through the three-way valve 14 to the upper heat exchanger forward pipe 15 and the lower heat exchanger forward pipe 16 and exchanges heat with the hot water in the hot water storage tank 2 by the upper heat exchanger 9 is the upper heat exchanger return pipe. The carbon dioxide refrigerant that has exchanged heat with the hot water in the hot water storage tank 2 in the lower heat exchanger 10 passes through the lower heat exchanger return pipe 19 and returns to the electronic expansion valve 12 through the heat pump return three-way valve 18 from 17. A heat pump circuit 20 is configured by returning to the expansion valve 12, and a heat pump control unit 21 that controls driving of the heat pump circuit 20 is provided.

前記ヒートポンプ回路２０内には冷媒として二酸化炭素が用いられて超臨界ヒートポンプサイクルを構成しているもので、熱交換時において冷媒は超臨界状態のまま凝縮されるため効率良く高温まで貯湯タンク２内の低温水を加熱することができ、貯湯タンク２内の低温水を電熱ヒータなしで約９０℃の高温まで沸き上げることが可能であり、給水管８からの給水により貯湯タンク２内の湯水が押し上げられて貯湯タンク２内上部の高温水が出湯管７から押し出されて給湯されるものである。 In the heat pump circuit 20, carbon dioxide is used as a refrigerant to constitute a supercritical heat pump cycle. During the heat exchange, the refrigerant is condensed in a supercritical state, so that the inside of the hot water storage tank 2 is efficiently heated to a high temperature. The low-temperature water in the hot water storage tank 2 can be heated up to a high temperature of about 90 ° C. without an electric heater, and the hot water in the hot water storage tank 2 is supplied by the water supplied from the water supply pipe 8. The hot water in the upper part of the hot water storage tank 2 is pushed up and pushed out from the hot water discharge pipe 7 to supply hot water.

２２は前記浴槽６の湯水を加熱するためのステンレス製の蛇管よりなる風呂熱交換器で、貯湯タンク２内の上部に配置されていると共に、この風呂熱交換器２２には風呂往き管２３および風呂循環ポンプ２４を備えた風呂戻り管２５よりなる風呂循環回路２６が接続されて浴槽６の湯水が循環可能にされ、浴槽６内の湯水が貯湯タンク２内の高温水により加熱されて保温あるいは追い焚きが行われるものである。 Reference numeral 22 denotes a bath heat exchanger made of a stainless steel serpentine tube for heating the hot water in the bathtub 6, which is arranged at the upper part in the hot water storage tank 2. The bath heat exchanger 22 includes a bath outlet pipe 23 and A bath circulation circuit 26 comprising a bath return pipe 25 equipped with a bath circulation pump 24 is connected so that hot water in the bathtub 6 can be circulated, and the hot water in the bathtub 6 is heated by the high-temperature water in the hot water storage tank 2 to keep it warm. Reaping is done.

２７は風呂戻り管２５を介して風呂熱交換器２２に流入する浴槽水の温度を検出する風呂戻り温度センサ、２８は風呂熱交換器２２を流出して風呂往き管２３を介して浴槽６へ流れる浴槽水の温度を検出する風呂往き温度センサ、２９は風呂戻り管２２に備えられ浴槽６内に流入する追い焚きされた浴槽水の循環流量を調節する流量調節弁で、前記ヒートポンプユニット３内で外気と接する位置に取り付けられた外気温検知センサ３０からの検出値を入力する制御部３１によって、外気温度が低い時は流量調節弁２９を全開状態にして、循環流量を増大させることで体感温度を高くし、逆に外気温度が高い時は流量調節弁２９を絞って、循環流量を小さくして体感温度を低くするように自動調節されるものである。 A bath return temperature sensor 27 detects the temperature of the bath water flowing into the bath heat exchanger 22 through the bath return pipe 25, and 28 flows out of the bath heat exchanger 22 to the bath 6 through the bath outlet pipe 23. A bath temperature sensor 29 for detecting the temperature of the flowing bath water, 29 is a flow rate adjusting valve provided in the bath return pipe 22 for adjusting the circulation flow rate of the reheated bath water flowing into the bath 6, and in the heat pump unit 3 When the outside air temperature is low, when the outside air temperature is low, the flow rate control valve 29 is fully opened to increase the circulation flow rate. When the temperature is increased, and conversely, when the outside air temperature is high, the flow rate adjustment valve 29 is throttled to automatically adjust the circulation flow rate to lower the sensible temperature.

３２は出湯管７からの湯と給水管８から分岐された給水バイパス管３３からの低温水を混合する電動ミキシング弁より構成された給湯混合弁であり、その下流の給湯管３４に設けた給湯温度センサ３５で検出した湯温がユーザーが設定した給湯設定温度になるように混合比率が制御されるものである。 A hot water supply mixing valve 32 is composed of an electric mixing valve that mixes hot water from the hot water discharge pipe 7 and low temperature water from the water supply bypass pipe 33 branched from the water supply pipe 8, and is provided with a hot water supply pipe 34 downstream thereof. The mixing ratio is controlled so that the hot water temperature detected by the temperature sensor 35 becomes the hot water supply set temperature set by the user.

３６は給湯管３４から分岐されて風呂戻り管２５に連通された湯張り管で、この湯張り管３６には、浴槽６への湯張りの開始／停止を行う湯張り弁３７と、浴槽６への湯張り量をカウントする風呂流量カウンタ３８と、浴槽水が給湯管３４へ逆流するのを防止する逆止弁３９とが設けられており、貯湯タンク２内の高温水を浴槽６に直接差し湯して追い焚きする時もこの湯張り管３６を介して行われるものである。 Reference numeral 36 denotes a hot water pipe branched from the hot water supply pipe 34 and communicated with the bath return pipe 25. The hot water pipe 36 includes a hot water valve 37 for starting / stopping hot water filling the bathtub 6, and a bathtub 6 A bath flow rate counter 38 that counts the amount of hot water to the hot water and a check valve 39 that prevents the bath water from flowing back to the hot water supply pipe 34 are provided, and the hot water in the hot water storage tank 2 is directly supplied to the bathtub 6. The hot water filling pipe 36 is also used when pouring hot water.

４０は貯湯タンク２の上下方向に複数個配置された貯湯温度センサで、この実施形態では５つの貯湯温度センサが配置され上から４０ａ、４０ｂ、４０ｃ、４０ｄ、４０ｅと呼び、この貯湯温度センサ４０が検出する温度情報によって、貯湯タンク２内にどれだけの熱量が残っているかを検知し、そして貯湯タンク２内の上下方向の温度分布を検知するものである。 A plurality of hot water storage temperature sensors 40 are arranged in the vertical direction of the hot water storage tank 2. In this embodiment, five hot water storage temperature sensors are arranged and are called 40 a, 40 b, 40 c, 40 d, 40 e from the top. Is used to detect how much heat is left in the hot water storage tank 2 and to detect the temperature distribution in the vertical direction in the hot water storage tank 2.

前記風呂リモコン５には、給湯設定温度を設定する給湯温度設定スイッチ４１、および風呂設定温度を設定する風呂温度設定スイッチ４２がそれぞれ設けられていると共に、浴槽６へ風呂設定温度の湯を湯張りし所定時間保温させる風呂自動スイッチ４３と、浴槽６内に高温の湯を差し湯させる高温差し湯スイッチ４４、ぬるめスイッチ４５、追い焚きスイッチ４６が設けられているものである。 The bath remote controller 5 is provided with a hot water supply temperature setting switch 41 for setting the hot water supply set temperature and a bath temperature setting switch 42 for setting the bath set temperature, respectively. There are provided a bath automatic switch 43 for keeping warm for a predetermined time, a hot water hot water switch 44 for pouring hot water into the bathtub 6, a lukewarm switch 45, and a reheating switch 46.

４７は貯湯タンク２の過圧を逃す過圧逃し弁、４８は給水の圧力を減圧する減圧弁、４９は給湯する湯水の量をカウントする給湯流量カウンタ、５０は給水の温度を検出する給水温度センサである。 47 is an overpressure relief valve for releasing the overpressure of the hot water storage tank 2, 48 is a pressure reducing valve for reducing the pressure of the water supply, 49 is a hot water supply flow rate counter for counting the amount of hot water supplied, and 50 is a water supply temperature for detecting the temperature of the water supply. It is a sensor.

次にこの一実施形態の作動を説明する。
まず、深夜電力時間帯になって貯湯温度センサ４０が貯湯タンク２内に翌日に必要な熱量が残っていないことを検出すると、制御部３１はヒーポン制御部２１に対して沸き上げ開始指令を発する。
指令を受けたヒーポン制御部２１は圧縮機１１を起動し、超臨界圧力まで加圧された高温高圧の自然冷媒をヒーポン往き三方弁１４を通って上部熱交換器往き管１５と下部熱交換器往き管１６から上部熱交換器９と下部熱交換器１０に供給し、貯湯タンク２内の湯水を７０〜９０℃程度の高温に加熱する。 Next, the operation of this embodiment will be described.
First, when the hot water storage temperature sensor 40 detects that the necessary amount of heat does not remain in the hot water storage tank 2 in the midnight power time zone, the control unit 31 issues a boiling start command to the heat pump control unit 21. .
Upon receiving the command, the heat pump control unit 21 starts the compressor 11 and passes the high-temperature and high-pressure natural refrigerant pressurized to the supercritical pressure through the heat-pump three-way valve 14 and the upper heat exchanger forward pipe 15 and the lower heat exchanger. It supplies to the upper heat exchanger 9 and the lower heat exchanger 10 from the going pipe 16, and heats the hot water in the hot water storage tank 2 to about 70-90 degreeC.

貯湯タンク２内の上部熱交換器９と下部熱交換器１０にて貯湯タンク２内の湯水を加熱するので、貯湯タンク２内に対流が発生し、貯湯タンク２内の上部から高温水となるため、貯湯温度センサ４０ａ、４０ｂが必要な熱量が貯湯されたことを検出すると、制御部３１はヒーポン制御部２１に対して上部熱交換器９への高温高圧の自然冷媒の供給停止指令を発し、ヒーポン制御部２１は一旦圧縮機１１を停止すると共に、ヒーポン往き三方弁１４とヒーポン戻り三方弁１８を駆動して高温高圧の自然冷媒を下部熱交換器１０だけに供給するようにしてから再度圧縮機１１を駆動する。 Since the hot water in the hot water storage tank 2 is heated by the upper heat exchanger 9 and the lower heat exchanger 10 in the hot water storage tank 2, convection occurs in the hot water storage tank 2, and high temperature water is generated from the upper part in the hot water storage tank 2. Therefore, when the hot water storage temperature sensors 40a and 40b detect that the necessary amount of heat has been stored, the control unit 31 issues a high temperature and high pressure natural refrigerant supply stop command to the upper heat exchanger 9 to the heat pump control unit 21. The heat pump controller 21 once stops the compressor 11 and drives the heat pump forward three-way valve 14 and the heat pump return three-way valve 18 so as to supply the high-temperature and high-pressure natural refrigerant only to the lower heat exchanger 10 and then again. The compressor 11 is driven.

そして貯湯温度センサ４０ｃ、４０ｄ、４０ｅが必要な熱量が貯湯されたことを検出すると、制御部３１はヒーポン制御部２１に対して沸き上げ停止指令を発し、制御部３１は圧縮機１１を停止すると共にヒーポン往き三方弁１４とヒーポン戻り三方弁１８を駆動して高温高圧の自然冷媒が上部熱交換器９と下部熱交換器１０の両方に供給できる状態にして沸き上げ動作を終了するものである。 When the hot water storage temperature sensors 40c, 40d and 40e detect that the necessary amount of heat has been stored, the control unit 31 issues a boiling stop command to the heat pump control unit 21, and the control unit 31 stops the compressor 11. At the same time, the heat pump forward three-way valve 14 and the heat pump return three-way valve 18 are driven so that the high-temperature and high-pressure natural refrigerant can be supplied to both the upper heat exchanger 9 and the lower heat exchanger 10, and the boiling operation is completed. .

次に給湯運転について説明する。
まず給湯栓４を開くと、給水管８からの給水が貯湯タンク２内に流れ込む。
そして貯湯タンク２に貯められた高温水が出湯管７を介して給湯混合弁３２へ流入し、給水バイパス管３３からの低温水と混合され、制御部３１により給湯混合弁３２の混合比率が調整されて給湯設定温度の湯が給湯栓４から給湯され、そして給湯栓４の閉止によって給湯が終了するものである。 Next, the hot water supply operation will be described.
First, when the hot water tap 4 is opened, the water supplied from the water supply pipe 8 flows into the hot water storage tank 2.
Then, the hot water stored in the hot water storage tank 2 flows into the hot water supply mixing valve 32 through the hot water discharge pipe 7 and is mixed with the low temperature water from the water supply bypass pipe 33, and the mixing ratio of the hot water supply mixing valve 32 is adjusted by the control unit 31. Then, hot water having a hot water supply set temperature is supplied from the hot water tap 4, and the hot water supply is terminated when the hot water tap 4 is closed.

次に浴槽６への風呂自動運転について説明する。
まず風呂リモコン５の風呂自動スイッチ４３が操作されると、湯張り弁３７が開成され給湯混合弁３２で風呂設定温度に混合した温水を浴槽６に湯張りし、そして風呂流量カウンタ３８が浴槽６の満量をカウントすることで湯張りを終了すると共に、風呂循環ポンプ２４を駆動して、湯張りされた浴槽水を風呂循環回路２６を循環させ風呂熱交換器２２で設定温度まで追い焚きして風呂自動運転が終了されるものである。 Next, automatic bath operation to the bathtub 6 will be described.
First, when the bath automatic switch 43 of the bath remote controller 5 is operated, the hot water filling valve 37 is opened, hot water mixed to the bath set temperature is filled in the bathtub 6 by the hot water supply mixing valve 32, and the bath flow counter 38 is filled with the bath flow counter 38. The hot water filling is finished by counting the full amount of the water, and the bath circulation pump 24 is driven to circulate the hot water of the bath water through the bath circulation circuit 26 and to catch up to the set temperature with the bath heat exchanger 22. The automatic bath operation ends.

次に追い焚き運転について説明する。
まず風呂リモコン５の追い焚きスイッチ４６を押圧すると、風呂循環ポンプ２４が駆動開始し、浴槽６内の浴槽水を風呂往き管２３から風呂熱交換器２２へと送り、ここで貯湯タンク２内上部の高温水との熱交換で浴槽水を加熱して風呂戻り管２５で浴槽６へ戻すものであるが、ここで制御部３１では、外気温検知センサ３０が検出する外気温度が１８℃未満を検出した時、外気温度が低いと判断して流量調節弁２９を全開状態として循環流量を増大させて追い焚き運転を行い、風呂戻り温度センサ２７が風呂設定温度を検出すれば、風呂循環ポンプ２４を停止して追い焚きは終了となる。 Next, the chasing operation will be described.
First, when the reheating switch 46 of the bath remote controller 5 is pressed, the bath circulation pump 24 starts to be driven, and the bath water in the bathtub 6 is sent from the bath outlet pipe 23 to the bath heat exchanger 22 where the upper part in the hot water storage tank 2 is sent. The bath water is heated by heat exchange with high-temperature water and returned to the bathtub 6 by the bath return pipe 25. Here, in the control unit 31, the outside air temperature detected by the outside air temperature detection sensor 30 is less than 18 ° C. When it is detected, it is determined that the outside air temperature is low, the flow rate control valve 29 is fully opened, the circulation flow rate is increased, the recirculation operation is performed, and if the bath return temperature sensor 27 detects the bath set temperature, the bath circulation pump 24 is detected. Is stopped and chasing ends.

又外気温検知センサ３０が検出する外気温度が１８℃以上を検出した時、外気温度が高いと判断して流量調節弁２９を絞り循環流量を小さくしての追い焚き運転を行い、風呂戻り温度センサ２７が風呂設定温度を検出すれば、風呂循環ポンプ２４を停止して追い焚きは終了となる。 When the outside air temperature detected by the outside air temperature sensor 30 is detected to be 18 ° C. or more, it is judged that the outside air temperature is high, and the recirculation operation is performed by reducing the flow rate control valve 29 to reduce the circulating flow rate, and the bath return temperature. If the sensor 27 detects the bath set temperature, the bath circulation pump 24 is stopped and the reheating is finished.

この追い焚き運転中は、制御部３１は風呂戻り温度センサ２７が検出する温度が風呂設定温度未満かどうかを判断し、風呂設定温度未満の時は貯湯温度センサ４０ａ、４０ｂの検出値により貯湯タンク２内の風呂熱交換器２２の周りの湯水、つまり貯湯タンク２内上部の湯水が高温か否かを判断し、その結果貯湯タンク２内上部の湯水が高温ではない時、制御部３１はヒーポン制御部２１を介してヒーポン往き三方弁１４とヒーポン戻り三方弁１８を駆動して高温高圧の自然冷媒を上部熱交換器９だけに供給できる状態にしてから、圧縮機１１を起動し、超臨界圧力まで加圧された高温高圧の自然冷媒をヒーポン往き三方弁１４を通って上部熱交換器往き管１５に供給する。 During this reheating operation, the control unit 31 determines whether or not the temperature detected by the bath return temperature sensor 27 is lower than the bath set temperature, and when the temperature is lower than the bath set temperature, the hot water storage tank is detected by the detected values of the hot water storage temperature sensors 40a and 40b. When the hot water around the bath heat exchanger 22 in the inside of the hot water storage tank 2, that is, the hot water in the upper part of the hot water storage tank 2 is determined as being hot, as a result, the hot water in the upper part of the hot water storage tank 2 is not hot. The heat pump forward three-way valve 14 and the heat pump return three-way valve 18 are driven via the control unit 21 so that high-temperature and high-pressure natural refrigerant can be supplied only to the upper heat exchanger 9, and then the compressor 11 is started and supercritical. The high-temperature and high-pressure natural refrigerant pressurized to the pressure is supplied to the upper heat exchanger forward pipe 15 through the heat pump forward three-way valve 14.

それにより貯湯タンク２内の風呂熱交換器２２の周りの湯水が加熱され、湯温度センサ４０ａ、４０ｂの検出値により貯湯タンク２内上部の湯水が高温に加熱されたと判断したら、制御部３１はヒーポン制御部２１に対して上部熱交換器９への高温高圧の自然冷媒の供給停止指令を発し、ヒーポン制御部２１は一旦圧縮機１１を停止すると共に、ヒーポン往き三方弁１４とヒーポン戻り三方弁１８を駆動して高温高圧の自然冷媒が上部熱交換器９と下部熱交換器１０の両方に供給できる状態にして、貯湯タンク２内の風呂熱交換器２２の周りの湯水の加熱動作を終了するものである。 When the hot water around the bath heat exchanger 22 in the hot water storage tank 2 is thereby heated and the hot water in the upper part of the hot water storage tank 2 is determined to be heated to a high temperature by the detection values of the hot water temperature sensors 40a and 40b, the control unit 31 An instruction to stop the supply of the high-temperature and high-pressure natural refrigerant to the upper heat exchanger 9 is issued to the heat-pump control unit 21, and the heat-pump control unit 21 temporarily stops the compressor 11, and the heat-pump forward three-way valve 14 and the heat-pump return three-way valve 18 is driven so that high-temperature and high-pressure natural refrigerant can be supplied to both the upper heat exchanger 9 and the lower heat exchanger 10, and the heating operation of the hot water around the bath heat exchanger 22 in the hot water storage tank 2 is completed. To do.

このように貯湯タンク２内の風呂熱交換器２２の周りの湯水の加熱動作により、貯湯タンク２内の風呂熱交換器２２の周りの湯水が高温となり、その高温水と熱交換することで浴槽水を加熱し、風呂戻り温度センサ２７が風呂設定温度を検出すれば、風呂循環ポンプ２４を停止して追い焚きは終了となるものである。 In this way, the hot water around the bath heat exchanger 22 in the hot water storage tank 2 becomes hot due to the heating operation of the hot water around the bath heat exchanger 22 in the hot water storage tank 2, and the bathtub is obtained by exchanging heat with the high temperature water. When the water is heated and the bath return temperature sensor 27 detects the bath set temperature, the bath circulation pump 24 is stopped and the reheating is finished.

以上のように本発明では、従来の冷媒−水熱交換器及びヒーポン循環ポンプを不要とすることが出来、それによりヒートポンプユニット３を非常に小さくすることができるものである。 As described above, in the present invention, the conventional refrigerant-water heat exchanger and heat pump circulation pump can be dispensed with, and the heat pump unit 3 can be made very small.

又、本実施例では貯湯タンクユニット１とヒートポンプユニット３を別体としたが、これをひとつのユニットとして一体化しても従来の一体型に比べて非常に小さくすることができるものである。 Further, in the present embodiment, the hot water storage tank unit 1 and the heat pump unit 3 are separated, but even if they are integrated as one unit, it can be made much smaller than the conventional integrated type.

又、本実施例ではヒーポン往き三方弁１４とヒーポン戻り三方弁１８を備えたが、このヒーポン往き三方弁１４とヒーポン戻り三方弁１８を不要とし、図２に示すように圧縮機１１の下流と上部熱交換器往き管１５と下部熱交換器往き管１６とを常時連通状態とし、上部熱交換器戻り管１７の下流側に上部熱交換器用電子膨張弁５１を設けると共に、下部熱交換器戻り管１９の下流側に下部熱交換器用電子膨張弁５２を設け、上部熱交換器９と下部熱交換器１０への高温高圧の自然冷媒の供給は、上部熱交換器用電子膨張弁５１と下部熱交換器用電子膨張弁５２を制御することで行うようにしてもよいものである。 Further, in the present embodiment, the heat pump forward three-way valve 14 and the heat pump return three-way valve 18 are provided. The upper heat exchanger forward pipe 15 and the lower heat exchanger forward pipe 16 are always in communication with each other, and an upper heat exchanger electronic expansion valve 51 is provided on the downstream side of the upper heat exchanger return pipe 17 and the lower heat exchanger return. A lower heat exchanger electronic expansion valve 52 is provided on the downstream side of the pipe 19, and the supply of high-temperature and high-pressure natural refrigerant to the upper heat exchanger 9 and the lower heat exchanger 10 It may be performed by controlling the electronic expansion valve 52 for exchanger.

１貯湯タンクユニット
２貯湯タンク
３ヒートポンプユニット
６浴槽
７出湯管
８給水管
９上部熱交換器
１０下部熱交換器
１１圧縮機
１２電子膨張弁
１３蒸発器
１５上部熱交換器往き管
１６下部熱交換器往き管
１７上部熱交換器戻り管
１９下部熱交換器戻り管
２０ヒートポンプ回路
２２風呂熱交換器
２３風呂往き管
２４風呂循環ポンプ
２５風呂戻り管
２６風呂循環回路 DESCRIPTION OF SYMBOLS 1 Hot water storage tank unit 2 Hot water storage tank 3 Heat pump unit 6 Bathtub 7 Outlet pipe 8 Water supply pipe 9 Upper heat exchanger 10 Lower heat exchanger 11 Compressor 12 Electronic expansion valve 13 Evaporator 15 Upper heat exchanger outgoing pipe 16 Lower heat exchanger Outward pipe 17 Upper heat exchanger return pipe 19 Lower heat exchanger return pipe 20 Heat pump circuit 22 Bath heat exchanger 23 Bath forward pipe 24 Bath circulation pump 25 Bath return pipe 26 Bath circulation circuit

Claims

湯水を貯湯する貯湯タンクを備えた貯湯タンクユニットと、前記貯湯タンク内の湯水を加熱するヒートポンプユニットとを備え、前記貯湯タンクの上端には出湯管が接続されると共に下端には給水管が接続され、貯湯タンク内の上部には浴槽の湯水を加熱するための風呂熱交換器が設けられ、該風呂熱交換器には風呂往き管および風呂循環ポンプを備えた風呂戻り管よりなる風呂循環回路が接続された風呂装置に於いて、前記貯湯タンク内の上部で風呂熱交換器と対向する位置に上部熱交換器が配置されると共に、貯湯タンク内の下部には下部熱交換器が配置され、前記ヒートポンプユニットは圧縮機と、膨張弁と、蒸発器とを有し、前記圧縮機からの冷媒を上部熱交換器往き管と下部熱交換器往き管を介して上部熱交換器と下部熱交換器とに供給し、上部熱交換器と下部熱交換器を通過した冷媒を上部熱交換器戻り管と下部熱交換器戻り管を介して膨張弁に戻すヒートポンプ回路を構成することを特徴とする風呂装置。 A hot water storage tank unit having a hot water storage tank for storing hot water and a heat pump unit for heating the hot water in the hot water storage tank are provided, and a hot water discharge pipe is connected to the upper end of the hot water storage tank and a water supply pipe is connected to the lower end. A bath heat exchanger for heating the hot water in the bathtub is provided in the upper part of the hot water storage tank, and the bath heat exchanger includes a bath return pipe having a bath return pipe and a bath circulation pump. Is connected to the upper part of the hot water storage tank at the position facing the bath heat exchanger, and the lower part of the hot water storage tank is provided with the lower heat exchanger. The heat pump unit includes a compressor, an expansion valve, and an evaporator, and the refrigerant from the compressor passes the upper heat exchanger and the lower heat exchanger through the upper heat exchanger and the lower heat exchanger. With exchanger Supplied, a bath apparatus characterized by constituting a heat pump circuit for returning the refrigerant passing through the upper heat exchanger and lower heat exchanger to the expansion valve through the upper heat exchanger return tube and the lower heat exchanger return tube.

前記圧縮機からの冷媒はヒーポン往き三方弁を介して上部熱交換器往き管と下部熱交換器往き管とに供給されると共に、上部熱交換器と下部熱交換器を通過した冷媒はヒーポン戻り三方弁を介して膨張弁に戻り、貯湯タンク内の湯水を沸き上げる時はヒーポン往き三方弁とヒーポン戻り三方弁を動作させて圧縮機からの冷媒を上部熱交換器と下部熱交換器に供給し、貯湯タンク内の上部の湯水の温度が所定温度まで上昇したらヒーポン往き三方弁とヒーポン戻り三方弁を動作させて圧縮機からの冷媒を下部熱交換器のみに供給し、その後貯湯タンク内の下部の湯水の温度が所定温度まで上昇したら沸き上げを停止することを特徴とする請求項１記載の風呂装置。 The refrigerant from the compressor is supplied to the upper heat exchanger outgoing pipe and the lower heat exchanger outgoing pipe via the heat pump forward three-way valve, and the refrigerant passing through the upper heat exchanger and the lower heat exchanger is returned to the heat pump. When returning to the expansion valve via the three-way valve and boiling the hot water in the hot water storage tank, the heat pump forward three-way valve and the heat pump return three-way valve are operated to supply refrigerant from the compressor to the upper heat exchanger and the lower heat exchanger. Then, when the temperature of the hot water in the upper part of the hot water storage tank rises to a predetermined temperature, the heat pump forward three-way valve and the heat pump return three-way valve are operated to supply the refrigerant from the compressor only to the lower heat exchanger, and then in the hot water storage tank. The bath apparatus according to claim 1, wherein boiling is stopped when the temperature of the hot water in the lower part rises to a predetermined temperature.

前記圧縮機からの冷媒は上部熱交換器往き管と下部熱交換器往き管とに供給されると共に、前記膨張弁は上部熱交換器用膨張弁と下部熱交換器用膨張弁とからなり、上部熱交換器を通過した冷媒は上部熱交換器用膨張弁に戻り、下部熱交換器熱交換器を通過した冷媒は下部熱交換器用膨張弁に戻り、貯湯タンク内の湯水を沸き上げる時は上部熱交換器用膨張弁と下部熱交換器用膨張弁を動作させて圧縮機からの冷媒を上部熱交換器と下部熱交換器に供給し、貯湯タンク内の上部の湯水の温度が所定温度まで上昇したら上部熱交換器用膨張弁を動作させて圧縮機からの冷媒を下部熱交換器のみに供給し、その後貯湯タンク内の下部の湯水の温度が所定温度まで上昇したら沸き上げを停止することを特徴とする請求項１記載の風呂装置。 The refrigerant from the compressor is supplied to the upper heat exchanger outgoing pipe and the lower heat exchanger outgoing pipe, and the expansion valve includes an upper heat exchanger expansion valve and a lower heat exchanger expansion valve. The refrigerant that has passed through the exchanger returns to the expansion valve for the upper heat exchanger, the refrigerant that has passed through the lower heat exchanger heat exchanger returns to the expansion valve for the lower heat exchanger, and the upper heat exchange is performed when boiling the hot water in the hot water storage tank. The refrigerant from the compressor is supplied to the upper heat exchanger and the lower heat exchanger by operating the expansion valve for the cooler and the expansion valve for the lower heat exchanger, and when the temperature of the hot water in the hot water storage tank rises to a predetermined temperature, the upper heat The expansion valve for the exchanger is operated to supply the refrigerant from the compressor only to the lower heat exchanger, and then the boiling is stopped when the temperature of the lower hot water in the hot water storage tank rises to a predetermined temperature. Item 1. A bath apparatus according to item 1.

風呂循環回路により浴槽内の湯水を追い焚きする時に、貯湯タンク内の風呂熱交換器の周辺の湯水の温度が所定温度以下の時、圧縮機からの冷媒を上部熱交換器のみに供給し、貯湯タンク内の風呂熱交換器の周辺の湯水の温度が所定温度以上になった時、上部熱交換器への圧縮機からの冷媒の供給を停止することを特徴とする請求項２又は請求項３記載の風呂装置。 When the hot water in the bathtub is chased by the bath circulation circuit, when the temperature of the hot water around the bath heat exchanger in the hot water storage tank is below a predetermined temperature, the refrigerant from the compressor is supplied only to the upper heat exchanger, 3. The refrigerant supply from the compressor to the upper heat exchanger is stopped when the temperature of hot water around the bath heat exchanger in the hot water storage tank reaches a predetermined temperature or more. 3. The bath apparatus according to 3.