JP2006153456A - Heat pump type hot-water supply device - Google Patents

Heat pump type hot-water supply device Download PDF

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JP2006153456A
JP2006153456A JP2006071892A JP2006071892A JP2006153456A JP 2006153456 A JP2006153456 A JP 2006153456A JP 2006071892 A JP2006071892 A JP 2006071892A JP 2006071892 A JP2006071892 A JP 2006071892A JP 2006153456 A JP2006153456 A JP 2006153456A
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hot water
hot
water supply
water
tank
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Masanobu Saito
正信 斉藤
Yoshinori Enya
義徳 遠谷
Kiyoshi Koyama
清 小山
Sadahiro Takizawa
禎大 滝澤
Kazuaki Shikichi
千明 式地
Shigeya Ishigaki
茂弥 石垣
Hirokazu Izaki
博和 井崎
Hiroshi Mukoyama
洋 向山
Osamu Kuwabara
修 桑原
Haruhisa Yamazaki
晴久 山崎
Satoru Imai
悟 今井
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Priority to JP2006071892A priority Critical patent/JP2006153456A/en
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  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump type hot-water supply device capable of improving energy efficiency by utilizing effectively hot water in the middle part in a hot-water supply tank. <P>SOLUTION: This device is equipped with the hot-water supply tank 26, a heat pump coolant circuit X, a water circulation circuit N for hot-water supply, a service water pipe 38 capable of supplying service water, a top-part hot-water outlet pipe 40 for supplying hot water of a top part in the hot-water supply tank, an middle-part hot-water outlet pipe 33 for supplying hot water of a middle part in the hot-water supply tank, a control means 15B for selecting either of the hot water supplied through the top-part hot-water outlet pipe and the hot water supplied through the middle-part hot-water outlet pipe corresponding to the hot-water temperature of the middle part in a hot-water storage tank, and a mixing control valve 57 for adjusting hot water having a required temperature at a faucet 15 by mixing hot water from a hot-water supply pipe 59 where the top-part hot-water outlet pipe and the middle-part hot-water outlet pipe are joined together with the service water. The device is constituted so that, when the hot-water temperature at the middle part in the hot-water supply tank is lower than the hot-water temperature required at the faucet, the hot water on the top part side of the hot-water supply tank is taken out and supplied to the hot-water supply pipe. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、冷媒熱により水を加熱して、湯を給湯タンクに貯溜可能としたヒートポンプ式給湯装置に関する。   The present invention relates to a heat pump type hot water supply apparatus that heats water with refrigerant heat and can store hot water in a hot water supply tank.

従来、給湯用熱交換器が冷媒熱により水を加熱して給湯タンクに湯を貯溜可能としたヒートポンプ式給湯装置が提案されている(特許文献1参照)。   2. Description of the Related Art Conventionally, a heat pump type hot water supply apparatus has been proposed in which a hot water supply heat exchanger heats water with refrigerant heat and can store hot water in a hot water supply tank (see Patent Document 1).

上記特許文献1のものでは、給湯タンクに貯溜される湯の温度を、例えば、60℃以上に上昇させることが可能であるが、それよりも大幅に温度上昇させることが困難である。そこで、上記の冷媒として二酸化炭素を多く含有する冷媒とした場合、フロン系冷媒に比べ冷媒圧力が高いために、給湯タンクに貯溜される湯の温度が、例えば90℃程度にまで上昇させることが可能である。   With the thing of the said patent document 1, although it is possible to raise the temperature of the hot water stored in a hot water supply tank to 60 degreeC or more, for example, it is difficult to raise temperature significantly more than it. Therefore, when the refrigerant containing a large amount of carbon dioxide is used as the refrigerant, the temperature of the hot water stored in the hot water supply tank can be increased to, for example, about 90 ° C. because the refrigerant pressure is higher than that of the chlorofluorocarbon refrigerant. Is possible.

一般に、ヒートポンプ式給湯装置では、給湯タンクの天部の湯温が他に比べて高くなることから、この天部に出湯配管を接続し、これを通じて給湯される湯に水を混ぜて適温にした上で給湯する。
特開平11−193958号
Generally, in a heat pump type hot water supply device, the hot water temperature at the top of the hot water tank is higher than the others, so a hot water pipe is connected to this top, and water is mixed with the hot water supplied through this to make the temperature appropriate. Hot water is supplied above.
JP-A-11-193958

しかしながら、給湯タンクの湯温が高い場合、給湯時にはこの高温の湯に対し多量の水道水を混ぜて湯温を下げる必要があり、このヒートポンプ式給湯装置のエネルギ効率が低下するという問題がある。   However, when the hot water temperature of the hot water supply tank is high, it is necessary to lower the hot water temperature by mixing a large amount of tap water with the hot water at the time of hot water supply, and there is a problem that the energy efficiency of this heat pump hot water supply device is lowered.

本発明の目的は、上述の事情を考慮してなされたものであり、給湯タンク内の中間部の湯を有効に利用することによりエネルギ効率を向上させることができるヒートポンプ式給湯装置を提供することにある。   The object of the present invention is made in consideration of the above-mentioned circumstances, and provides a heat pump type hot water supply apparatus capable of improving energy efficiency by effectively using hot water in an intermediate part in a hot water supply tank. It is in.

請求項1に記載の発明は、湯を貯溜可能とした給湯タンクと、少なくとも圧縮機、ヒートポンプ熱交換器、及び冷媒対水熱交換器を有し、二酸化炭素を有する冷媒を用いたヒートポンプ冷媒回路と、前記給湯タンク内の底部の水を取り出し、前記冷媒対水熱交換器で前記圧縮機から吐出された冷媒の熱で加熱した後、その加熱された湯を前記給湯タンクの天部から給湯タンク内に戻す給湯用水循環回路と、前記給湯タンクの底部に設けられ、水道水を常時水道水圧がその給湯タンク内に作用するように供給可能とする水道水配管と、前記給湯タンクの天部に設けられ、その給湯タンク内の上部の湯を給湯する天部出湯配管と、前記給湯タンクの天部と底部との中間部に設けられ、その給湯タンク内の中間部の湯を給湯する中間部出湯配管と、前記貯湯タンク内の中間部の湯温に応じて、前記天部出湯配管を通じて給湯される湯、或いは中間部出湯配管を通じて給湯される湯のいずれかを選択する制御手段と、前記天部出湯配管と中間部出湯配管が合流した給湯配管からの湯と水道水とを混合して蛇口での必要温度の湯を調整する混合制御弁とを備え、前記給湯タンク内の中間部の湯温が前記蛇口での必要される湯温より低い場合に、前記給湯タンクの天部側の湯を取り出して前記給湯配管に供給することを特徴とする。   The invention according to claim 1 is a heat pump refrigerant circuit having a hot water supply tank capable of storing hot water, at least a compressor, a heat pump heat exchanger, and a refrigerant-to-water heat exchanger, and using a refrigerant having carbon dioxide. The water at the bottom of the hot water tank is taken out and heated with the heat of the refrigerant discharged from the compressor in the refrigerant-to-water heat exchanger, and then the heated hot water is supplied from the top of the hot water tank. A hot water circulation circuit for returning the water to the tank, a tap water pipe provided at the bottom of the hot water tank, and capable of supplying tap water so that the tap water pressure is always applied to the hot water tank, and the top of the hot water tank The hot water supply pipe for supplying hot water in the upper part of the hot water supply tank and the intermediate part of the hot water tank for supplying hot water in the intermediate part in the hot water tank. Part hot water piping, Control means for selecting either hot water supplied through the top hot water piping or hot water supplied through the intermediate hot water piping according to the hot water temperature in the intermediate portion in the hot water storage tank, and the top hot water piping And a mixing control valve that adjusts the hot water at the faucet by mixing hot water and hot water from the hot water supply pipe joined by the intermediate hot water supply pipe, and the hot water temperature in the intermediate hot water tank is When the temperature is lower than the required hot water temperature at the faucet, the hot water on the top side of the hot water supply tank is taken out and supplied to the hot water supply pipe.

請求項2に記載の発明は、請求項1に記載のヒートポンプ式給湯装置において、前記給湯タンク内の湯を天部から導出し、浴槽用熱交換器を経て前記給湯タンクの前記中間部へ循環させる循環配管と、浴槽内の湯または水を前記浴槽用熱交換器へ循環させて前記給湯タンクから導出した湯で加熱する浴槽用水循環回路とを備え、浴槽内の湯温が適温以下に低下したときに前記加熱が行なわれることを特徴とする。   According to a second aspect of the present invention, in the heat pump hot water supply apparatus according to the first aspect, the hot water in the hot water supply tank is led out from the top and circulated to the intermediate portion of the hot water tank through a heat exchanger for a bathtub. And a water circulation circuit for the bathtub that circulates the hot water or water in the bathtub to the heat exchanger for the bathtub and heats it with the hot water derived from the hot water tank, and the hot water temperature in the bathtub is lowered below an appropriate temperature. The heating is performed when the heating is performed.

請求項3に記載の発明は、請求項2に記載のヒートポンプ式給湯装置において、前記天部出湯配管及び前記循環配管は、それぞれ独立して前記給湯タンクに取付けられていることを特徴とする。   According to a third aspect of the present invention, in the heat pump hot water supply apparatus according to the second aspect, the top hot water supply pipe and the circulation pipe are each independently attached to the hot water supply tank.

本発明によれば、湯を貯溜可能とした給湯タンクと、少なくとも圧縮機、ヒートポンプ熱交換器、及び冷媒対水熱交換器を有し、二酸化炭素を有する冷媒を用いたヒートポンプ冷媒回路と、前記給湯タンク内の底部の水を取り出し、前記冷媒対水熱交換器で前記圧縮機から吐出された冷媒の熱で加熱した後、その加熱された湯を前記給湯タンクの天部から給湯タンク内に戻す給湯用水循環回路と、前記給湯タンクの底部に設けられ、水道水を常時水道水圧がその給湯タンク内に作用するように供給可能とする水道水配管と、前記給湯タンクの天部に設けられ、その給湯タンク内の上部の湯を給湯する天部出湯配管と、前記給湯タンクの天部と底部との中間部に設けられ、その給湯タンク内の中間部の湯を給湯する中間部出湯配管と、前記貯湯タンク内の中間部の湯温に応じて、前記天部出湯配管を通じて給湯される湯、或いは中間部出湯配管を通じて給湯される湯のいずれかを選択する制御手段と、前記天部出湯配管と中間部出湯配管が合流した給湯配管からの湯と水道水とを混合して蛇口での必要温度の湯を調整する混合制御弁とを備え、前記給湯タンク内の中間部の湯温が前記蛇口での必要される湯温より低い場合に、前記給湯タンクの天部側の湯を取り出して前記給湯配管に供給する構成としたから、給湯タンク内上部の高温の湯と給湯タンク内中間部の中間温度の湯と水道水とをそれぞれ効率良く利用して、必要温度の適温の湯を給湯でき、無駄に多量の水道水を混合して給湯したり、不要な沸き上げを行なったりすることを抑えることが可能になり、エネルギ効率が向上する。   According to the present invention, a hot water supply tank capable of storing hot water, a heat pump refrigerant circuit using a refrigerant having carbon dioxide having at least a compressor, a heat pump heat exchanger, and a refrigerant-to-water heat exchanger, Water at the bottom of the hot water tank is taken out and heated with the heat of the refrigerant discharged from the compressor in the refrigerant-to-water heat exchanger, and then the heated hot water is transferred from the top of the hot water tank into the hot water tank. A hot water supply water circulation circuit to be returned, provided at the bottom of the hot water tank, and provided with tap water piping for allowing tap water to be supplied so that the tap water pressure is always applied to the hot water tank, and at the top of the hot water tank. A hot water supply pipe for supplying hot water in the upper part of the hot water supply tank, and an intermediate hot water supply pipe for supplying hot water in the intermediate part of the hot water supply tank provided in the intermediate part between the top and bottom of the hot water supply tank And the hot water storage Control means for selecting either hot water supplied through the top hot water piping or hot water supplied through the intermediate hot water piping according to the hot water temperature in the intermediate portion in the tank, and the top hot water piping and the intermediate And a mixing control valve that adjusts the hot water at the required temperature at the faucet by mixing hot water from the hot water supply pipe joined by the hot water supply pipe and tap water, and the hot water temperature in the middle of the hot water tank is at the faucet. When the hot water temperature is lower than the required hot water temperature, the hot water on the top side of the hot water supply tank is taken out and supplied to the hot water supply pipe. Efficient use of hot water and tap water, respectively, can supply hot water at the required temperature, and prevent unnecessary hot water mixing and unnecessary boiling. Energy efficiency That.

本発明は、給湯タンク内の中間部の湯を有効に利用することによりエネルギ効率を向上させることができるヒートポンプ式給湯装置を提供することを目的として、湯を貯溜可能とした給湯タンクと、少なくとも圧縮機、ヒートポンプ熱交換器、及び冷媒対水熱交換器を有し、二酸化炭素を有する冷媒を用いたヒートポンプ冷媒回路と、前記給湯タンク内の底部の水を取り出し、前記冷媒対水熱交換器で前記圧縮機から吐出された冷媒の熱で加熱した後、その加熱された湯を前記給湯タンクの天部から給湯タンク内に戻す給湯用水循環回路と、前記給湯タンクの底部に設けられ、水道水を常時水道水圧がその給湯タンク内に作用するように供給可能とする水道水配管と、前記給湯タンクの天部に設けられ、その給湯タンク内の上部の湯を給湯する天部出湯配管と、前記給湯タンクの天部と底部との中間部に設けられ、その給湯タンク内の中間部の湯を給湯する中間部出湯配管と、前記貯湯タンク内の中間部の湯温に応じて、前記天部出湯配管を通じて給湯される湯、或いは中間部出湯配管を通じて給湯される湯のいずれかを選択する制御手段と、前記天部出湯配管と中間部出湯配管が合流した給湯配管からの湯と水道水とを混合して蛇口での必要温度の湯を調整する混合制御弁とを備え、前記給湯タンク内の中間部の湯温が前記蛇口での必要される湯温より低い場合に、前記給湯タンクの天部側の湯を取り出して前記給湯配管に供給する構成としたものであり、以下に本発明の一実施例を記載する。   The present invention aims to provide a heat pump hot water supply device capable of improving energy efficiency by effectively using hot water in an intermediate portion in a hot water supply tank, and a hot water supply tank capable of storing hot water, at least A heat pump refrigerant circuit having a compressor, a heat pump heat exchanger, and a refrigerant-to-water heat exchanger, using a refrigerant having carbon dioxide, and taking out water at a bottom portion in the hot water tank; A hot water circulation circuit for returning the heated hot water from the top of the hot water supply tank to the hot water supply tank, and at the bottom of the hot water supply tank. Tap water piping that allows water to be supplied so that the tap water pressure is always applied to the hot water tank, and the hot water of the upper part of the hot water tank are provided at the top of the hot water tank. A hot water outlet pipe, an intermediate hot water pipe provided at an intermediate portion between the top and bottom of the hot water tank and supplying hot water in the intermediate portion of the hot water tank, and an intermediate hot water temperature in the hot water storage tank. Depending on the control means for selecting either hot water supplied through the top hot water supply pipe or hot water supplied through the intermediate hot water supply pipe, and the hot water hot water supply pipe joined by the top hot water supply pipe and the intermediate hot water supply pipe And a mixing control valve for adjusting hot water at a required temperature at the faucet by mixing hot water from tap and tap water, and the hot water temperature at the intermediate portion in the hot water tank is lower than the required hot water temperature at the faucet In this case, the hot water on the top side of the hot water supply tank is taken out and supplied to the hot water supply pipe, and one embodiment of the present invention will be described below.

以下、本発明の一実施例を、図1〜図4に基づき説明する。   An embodiment of the present invention will be described below with reference to FIGS.

図1は、本発明に係るヒートポンプ式給湯装置の一実施例を示し、給湯タンク内の水を加熱し、同タンク内に湯を貯溜するときの回路図である。   FIG. 1 shows an embodiment of a heat pump type hot water supply apparatus according to the present invention, and is a circuit diagram when water in a hot water supply tank is heated and hot water is stored in the tank.

この図1に示すように、ヒートポンプ式給湯装置10は、ヒートポンプユニット11、給湯ユニット12、蛇口13、浴槽14、並びに制御装置15A及び15Bを有して構成される。   As shown in FIG. 1, the heat pump type hot water supply apparatus 10 includes a heat pump unit 11, a hot water supply unit 12, a faucet 13, a bathtub 14, and control devices 15A and 15B.

ヒートポンプユニット11は、圧縮機16、給湯用熱交換器(冷媒対水熱交換器)27、ヒートポンプ熱交換器18及びアキュムレータ17が順次配設されて冷媒配管19によりループ状に接続して成るヒートポンプ冷媒回路Xを備えて構成されている。圧縮機16は、冷媒を圧縮する。また、上記給湯用熱交換器27は、圧縮機16から吐出された冷媒の熱により湯または水を加熱する。この一実施例において、冷媒として二酸化炭素を多量に含有する冷媒を使用している。即ち、上記ヒートポンプ冷媒回路Xは、二酸化炭素を冷媒として用いている。このように、二酸化炭素を冷媒とした場合には、通常、フロン系冷媒に比べ冷媒圧力が高くなる。   The heat pump unit 11 includes a compressor 16, a hot water supply heat exchanger (refrigerant-to-water heat exchanger) 27, a heat pump heat exchanger 18, and an accumulator 17 that are sequentially arranged and connected in a loop through a refrigerant pipe 19. A refrigerant circuit X is provided. The compressor 16 compresses the refrigerant. The hot water supply heat exchanger 27 heats hot water or water by the heat of the refrigerant discharged from the compressor 16. In this embodiment, a refrigerant containing a large amount of carbon dioxide is used as the refrigerant. That is, the heat pump refrigerant circuit X uses carbon dioxide as a refrigerant. Thus, when carbon dioxide is used as the refrigerant, the refrigerant pressure is usually higher than that of the chlorofluorocarbon refrigerant.

前記した給湯ユニット12は、給湯タンク26及び浴槽用熱交換器(水対水熱交換器)28、並びに蛇口給湯ライン71及び浴槽注湯ライン72等を有して構成される。   The aforementioned hot water supply unit 12 includes a hot water supply tank 26, a bathtub heat exchanger (water-to-water heat exchanger) 28, a faucet hot water supply line 71, a bathtub pouring line 72, and the like.

上記給湯タンク26は、給湯用熱交換器27を用いて冷媒熱により加熱された湯を貯溜するものである。この給湯タンク26と給湯用熱交換器27とは、給湯用循環ポンプ34、流量調整弁35、第1切換電磁弁73を備えた給湯用水配管36によりループ状に連結されて、第1切換電磁弁73の開操作時に、図1の太線に示すように、水が循環する給湯用水循環回路Nが構成される。   The hot water supply tank 26 stores hot water heated by refrigerant heat using a hot water supply heat exchanger 27. The hot water supply tank 26 and the hot water supply heat exchanger 27 are connected in a loop by a hot water supply water pipe 36 provided with a hot water supply circulation pump 34, a flow rate adjusting valve 35, and a first switching electromagnetic valve 73. When the valve 73 is opened, as shown by the thick line in FIG. 1, a hot water supply water circulation circuit N for circulating water is configured.

冷媒に、二酸化炭素を用いた場合、上記のように、フロン系冷媒に比べ冷媒圧力が高くなり、給湯用熱交換器27に貯溜される湯の温度は90℃程度にまで上昇する。   When carbon dioxide is used as the refrigerant, as described above, the refrigerant pressure becomes higher than that of the chlorofluorocarbon refrigerant, and the temperature of the hot water stored in the hot water supply heat exchanger 27 rises to about 90 ° C.

ヒートポンプユニット11と給湯ユニット12間は、給湯用水配管36によりループ状に連結されるため、従来と比較した場合、高圧の冷媒配管(例えば冷媒配管19)は外部に露出せず、ヒートポンプ式給湯装置の安全性を向上させることができる。   Since the heat pump unit 11 and the hot water supply unit 12 are connected in a loop shape by the hot water supply water pipe 36, compared to the conventional case, the high pressure refrigerant pipe (for example, the refrigerant pipe 19) is not exposed to the outside, and the heat pump hot water supply apparatus. Safety can be improved.

給湯タンク26の底部26Bには、減圧逆止弁37を配設した第1水道水配管38が接続されて、給湯タンク26内へ常に水道水が供給可能とされる。したがって、給湯タンク26内に常時水道水圧が作用する。   A first tap water pipe 38 provided with a pressure reducing check valve 37 is connected to the bottom portion 26 </ b> B of the hot water supply tank 26 so that tap water can be always supplied into the hot water supply tank 26. Therefore, tap water pressure always acts in the hot water supply tank 26.

また、この給湯タンク26の天部26Aには、給湯タンク26内天部の高温の湯を取り出すための第一開閉弁91を有した天部出湯配管40が接続され、上記給湯タンク26の天部26Aと底部26Bとのほぼ中間部26Cには、給湯タンク26内中間部の中間温度域の湯を取り出すための第二開閉弁92を有した中間部出湯配管33が接続されている。これら配管40,33にそれぞれ接続された第一、第二開閉弁91,92は、給湯タンク26の中間部26Cに設置された温度センサ94によって検知される湯温に応じ、制御装置15Bを介して選択的に開閉制御される。   Further, the top 26 A of the hot water supply tank 26 is connected to a top hot water discharge pipe 40 having a first on-off valve 91 for taking out hot hot water from the top of the hot water supply tank 26. An intermediate portion hot water supply pipe 33 having a second on-off valve 92 for taking out hot water in an intermediate temperature region of the intermediate portion in the hot water supply tank 26 is connected to a substantially intermediate portion 26C between the portion 26A and the bottom portion 26B. The first and second on-off valves 91 and 92 connected to the pipes 40 and 33 are respectively connected via the control device 15B according to the hot water temperature detected by the temperature sensor 94 installed in the intermediate part 26C of the hot water tank 26. Open / close controlled selectively.

給湯用循環ポンプ34の稼働により、給湯タンク26の底部26Bの水が給湯用熱交換器27に送給されると、この給湯用熱交換器27は、送給された水を、ヒートポンプユニット11におけるヒートポンプ冷媒回路Xの圧縮機16から吐出された冷媒ガスの熱によって加熱する。この加熱された湯または水は、第1切換電磁弁73の開操作時に、流量調整弁35により流量調整され、給湯タンク26の天部26Aへ導かれ、給湯タンク26内に上限約90℃の湯が貯溜可能とされる。   When the water in the bottom portion 26B of the hot water supply tank 26 is supplied to the hot water supply heat exchanger 27 by the operation of the hot water supply circulation pump 34, the hot water supply heat exchanger 27 converts the supplied water into the heat pump unit 11. Is heated by the heat of the refrigerant gas discharged from the compressor 16 of the heat pump refrigerant circuit X. When the first switching solenoid valve 73 is opened, the heated hot water or water is adjusted in flow rate by the flow rate adjusting valve 35 and guided to the top 26A of the hot water supply tank 26, and has an upper limit of about 90 ° C. in the hot water supply tank 26. Hot water can be stored.

39は圧力逃し弁であり、この圧力逃し弁39は、湯または水が過剰に加熱されて、給湯タンク26内の圧力が過大となった時に、この圧力を給湯タンク36の外に逃がすものである。   39 is a pressure relief valve, and this pressure relief valve 39 is for releasing this pressure out of the hot water supply tank 36 when the hot water or water is heated excessively and the pressure in the hot water supply tank 26 becomes excessive. is there.

上記浴槽用熱交換器28は、給湯タンク26内の湯を循環させて浴槽14内の湯を追い焚きする水対水熱交換器である。給湯タンク26内の湯は、天部26Aから導出された循環配管101中のポンプ102の駆動により汲み出される。この汲み出された湯は、循環配管101を経て、浴槽用熱交換器28に導かれて、浴槽14内の湯または水を加熱(追い焚き)した後に、第2切換電磁弁74、及び戻り配管103を経て、給湯タンク26の天部26Aと底部26Bとの中間部26Cへ戻される。   The bathtub heat exchanger 28 is a water-to-water heat exchanger that circulates hot water in the hot water supply tank 26 to replenish hot water in the bathtub 14. Hot water in the hot water supply tank 26 is pumped out by driving the pump 102 in the circulation pipe 101 led out from the top portion 26A. The pumped hot water is led to the bathtub heat exchanger 28 through the circulation pipe 101 to heat (repel) the hot water or water in the bathtub 14, and then the second switching solenoid valve 74 and the return It returns to the intermediate part 26C between the top part 26A and the bottom part 26B of the hot water supply tank 26 via the pipe 103.

つまり、浴槽用熱交換器28は、給湯タンク26内の湯を導く導入水配管75と、浴槽14内の湯または水を導く第1浴槽用水配管51との接触によって、これらの導入水配管75と第1浴槽用水配管51内とをそれぞれ流れる湯または水を熱交換可能とするように構成されたものである。導入水配管75と第1浴槽用水配管51は、浴槽用熱交換器28を構成する部分においては、偏平管形状に形成されて接触面積が増大される。   That is, the bathtub heat exchanger 28 is brought into contact with the introduction water pipe 75 that guides hot water in the hot water supply tank 26 and the first bathtub water pipe 51 that guides hot water or water in the bathtub 14. And the hot water or water respectively flowing through the first bathtub water pipe 51 are configured to be able to exchange heat. The introduction water pipe 75 and the first bathtub water pipe 51 are formed in a flat tube shape in the portion constituting the bathtub heat exchanger 28 and the contact area is increased.

また、浴槽用熱交換器28と浴槽14とを連通する上記第1浴槽用水配管51は、浴槽用循環ポンプ46、フィルタ47、水位センサ48、サーミスタ49及びフロースイッチ50を備える。   The first bathtub water pipe 51 communicating the bathtub heat exchanger 28 and the bathtub 14 includes a bathtub circulation pump 46, a filter 47, a water level sensor 48, a thermistor 49, and a flow switch 50.

この第1浴槽用水配管51により、浴槽用熱交換器28と浴槽14との間で湯または水が循環する浴槽用水循環回路Pが構成される。   This first bathtub water pipe 51 constitutes a bathtub water circulation circuit P in which hot water or water circulates between the bathtub heat exchanger 28 and the bathtub 14.

水位センサ48は、第1浴槽用水配管51を介して浴槽14に連通していることから、この浴槽14内の湯または水の水位を検出する。また、サーミスタ49は、浴槽用水循環回路Pを湯または水が循環している時、その湯温を検知して、浴槽14内の湯温を間接的に検出する。また、フロースイッチ50は、浴槽用水循環回路Pを湯または水が循環していることを検出する。更に、フィルタ47は、浴槽14内に配設されたフィルタ(図示せず)とともに湯を濾過する。   Since the water level sensor 48 communicates with the bathtub 14 via the first bathtub water pipe 51, the water level sensor 48 detects the level of hot water or water in the bathtub 14. Further, the thermistor 49 detects the hot water temperature when the hot water or water is circulating in the bathtub water circulation circuit P, and indirectly detects the hot water temperature in the bathtub 14. Moreover, the flow switch 50 detects that hot water or water is circulating in the water circulation circuit P for bathtubs. Further, the filter 47 filters hot water together with a filter (not shown) disposed in the bathtub 14.

浴槽14内に後述の如く注湯がなされて、この浴槽14内に湯が張られ、この浴槽14内の湯を追い焚きする時、循環ポンプ102及び浴槽用循環ポンプ46が稼動される。すると、図4の太線に示すように、給湯タンク26内の湯と、浴槽14内の湯が、共に浴槽用熱交換器28内へ流入し、ここで熱交換し、浴槽14内の湯が、給湯タンク26内の湯によって追い焚きされる。浴槽用熱交換器28で仕事をした湯は、その熱交換により約50℃に温度低下して、水配管103を経て、給湯タンク26の中間部26Cに流入する。   As described later, hot water is poured into the bathtub 14 to fill the bathtub 14, and when the hot water in the bathtub 14 is replenished, the circulation pump 102 and the bathtub circulation pump 46 are operated. Then, as shown by the thick line in FIG. 4, the hot water in the hot water supply tank 26 and the hot water in the bathtub 14 flow into the bathtub heat exchanger 28, where heat is exchanged, and the hot water in the bathtub 14 is The hot water in the hot water supply tank 26 is chased away. The hot water worked in the bathtub heat exchanger 28 is lowered to about 50 ° C. by the heat exchange, and flows into the intermediate portion 26 </ b> C of the hot water supply tank 26 through the water pipe 103.

上記蛇口給湯ライン71は、図2の太線Qに示すように、給湯配管59、混合制御弁57及びフローセンサ58を備えて構成される。給湯タンク26には、第1水道水配管38を介して水道水圧が作用していることから、蛇口13を開くことにより、給湯タンク26内の湯が利用部としての蛇口13へ供給可能とされる。   The faucet hot water supply line 71 includes a hot water supply pipe 59, a mixing control valve 57, and a flow sensor 58, as shown by a thick line Q in FIG. Since tap water pressure is applied to the hot water supply tank 26 via the first tap water pipe 38, the hot water in the hot water supply tank 26 can be supplied to the faucet 13 as a utilization part by opening the faucet 13. The

上記フローセンサ58は、給湯配管59内を流れる湯量を検出する。また、混合制御弁57は、図2の太線Rに示すように、第2水道水配管62を介して第1水道水配管38の減圧逆止弁37下流側に接続される。   The flow sensor 58 detects the amount of hot water flowing through the hot water supply pipe 59. Further, the mixing control valve 57 is connected to the downstream side of the pressure reducing check valve 37 of the first tap water pipe 38 through the second tap water pipe 62 as shown by a thick line R in FIG.

従って、混合制御弁57の開度制御により、給湯配管59からの湯と第2水道水配管62からの水道水とが混合されて、蛇口13から給湯される湯が約60℃以下、例えば42℃に調整される。   Therefore, by controlling the opening degree of the mixing control valve 57, the hot water from the hot water supply pipe 59 and the tap water from the second tap water pipe 62 are mixed, and the hot water supplied from the faucet 13 is about 60 ° C. or less, for example 42 Adjusted to ° C.

上記浴槽注湯ライン72は、図3の太線Qに示すように、給湯配管59におけるフローセンサ58下流側と、第1浴槽用水配管51における浴槽用循環ポンプ46、フロースイッチ50間とを第2浴槽用水配管68により接続することにより構成され、給湯タンク26内の湯を浴槽14へ注湯可能とする。この第2浴槽用水配管68には、給湯配管59側からフローセンサ64、注湯用電磁弁65、リリーフ手段66、逆止弁67、電磁弁54が順次配設されている。   As shown by the thick line Q in FIG. 3, the bathtub pouring line 72 has a second passage between the downstream side of the flow sensor 58 in the hot water supply pipe 59 and between the bathtub circulation pump 46 and the flow switch 50 in the first bathtub water pipe 51. The hot water in the hot water supply tank 26 can be poured into the bathtub 14 by being connected by the bathtub water pipe 68. In the second bathtub water pipe 68, a flow sensor 64, a pouring electromagnetic valve 65, a relief means 66, a check valve 67, and an electromagnetic valve 54 are sequentially arranged from the hot water supply pipe 59 side.

ここで、フローセンサ64は、第2浴槽用水配管68内を流れる湯量を検出する。また、リリーフ手段66及び逆止弁67は、過剰に加熱された湯が第2浴槽用水配管68内を流れたときに、その圧力を逃がすものである。電磁弁54は、風呂への給湯時に開かれ、追い焚き時に閉じられる。   Here, the flow sensor 64 detects the amount of hot water flowing in the second bathtub water pipe 68. The relief means 66 and the check valve 67 release pressure when excessively heated hot water flows through the second bathtub water pipe 68. The solenoid valve 54 is opened when hot water is supplied to the bath, and is closed when reheating.

浴槽用循環ポンプ46を停止させた状態で、注湯用電磁弁65,54を開操作すると、図3の太線Qに示すように、給湯タンク26内の湯が、給湯配管59の一部及び第2浴槽用水配管68を流れて第1浴槽用水配管51内に至り、この第1浴槽用水配管51内でフロースイッチ50、サーミスタ49、水位センサ48及びフィルタ47を経て浴槽14へ注湯される。   When the hot water solenoid valves 65 and 54 are opened while the bathtub circulation pump 46 is stopped, the hot water in the hot water supply tank 26 becomes part of the hot water supply pipe 59 and The water flows through the second bathtub water pipe 68 and reaches the first bathtub water pipe 51, and is poured into the bathtub 14 through the flow switch 50, the thermistor 49, the water level sensor 48 and the filter 47 in the first bathtub water pipe 51. .

浴槽14内に給湯タンク26から適量の湯が注湯されたことが水位センサ48により検出された段階で、注湯用電磁弁65,54が閉操作される。その後、浴槽14内の湯温が適温以下に低下したことがサーミスタ49により検知されたときに、上記のように、浴槽14内の湯または水が加熱(追い焚き)され、浴槽14内の湯が保温される。   When the water level sensor 48 detects that a proper amount of hot water has been poured into the bathtub 14 from the hot water supply tank 26, the hot water solenoid valves 65 and 54 are closed. Thereafter, when the thermistor 49 detects that the temperature of the hot water in the bathtub 14 has fallen below the appropriate temperature, the hot water or the water in the bathtub 14 is heated (fired) as described above, and the hot water in the bathtub 14 is heated. Is kept warm.

このように、給湯タンク26から浴槽14へ適温の湯を適量注湯し、その後所定時間、浴槽14内の湯を適温に加熱(追い焚き)して保温動作する運転を、浴槽自動運転と称する。   In this way, an operation in which an appropriate amount of hot water is poured from the hot water supply tank 26 into the bathtub 14 and then the hot water in the bathtub 14 is heated to an appropriate temperature for a predetermined time (retreating) is referred to as automatic bath operation. .

上述の一実施例においては、冷媒として二酸化炭素を用いたヒートポンプ冷媒回路Xを備えたため、フロン系冷媒を用いた冷媒回路に比べて、給湯タンク26内に貯溜される湯の温度は90℃程度にまで大幅に上昇する。これによれば、給湯タンク26内の湯を循環させることによって、この湯温で浴槽14内の湯を追い焚きすることができる。従って、給湯せずに風呂を追い焚きする場合、ヒートポンプユニット11を運転する必要がなく、エネルギ効率を向上させることができる。   In the above-described embodiment, since the heat pump refrigerant circuit X using carbon dioxide as the refrigerant is provided, the temperature of the hot water stored in the hot water supply tank 26 is about 90 ° C. as compared with the refrigerant circuit using the fluorocarbon refrigerant. It will rise significantly to. According to this, by circulating the hot water in the hot water supply tank 26, the hot water in the bathtub 14 can be replenished with this hot water temperature. Therefore, in the case of chasing a bath without supplying hot water, it is not necessary to operate the heat pump unit 11 and energy efficiency can be improved.

前記制御装置15Aは、ヒートポンプユニット11に設置されて、圧縮機16の運転(容量制御を含む)及び停止を制御する。また、前記制御装置15Bは給湯ユニット12に設置されて、給湯用循環ポンプ34及び浴槽用循環ポンプ46の稼働または停止、第1切換電磁弁73、第2切換電磁弁74、注湯用電磁弁65及び54の開閉、流量調整弁35及び混合制御弁57の開度等を制御する。この制御装置15Bは、ヒートポンプユニット11の制御装置15Aと通信線78により接続されて、双方向の通信が可能とされるとともに、リモートコントローラ79に有線または無線状態で接続される。   The control device 15A is installed in the heat pump unit 11, and controls the operation (including capacity control) and stop of the compressor 16. The control device 15B is installed in the hot water supply unit 12 to operate or stop the hot water supply circulation pump 34 and the bathtub circulation pump 46, the first switching electromagnetic valve 73, the second switching electromagnetic valve 74, and the hot water supply electromagnetic valve. The opening and closing of the flow control valve 35 and the mixing control valve 57 are controlled. The control device 15B is connected to the control device 15A of the heat pump unit 11 by a communication line 78, enables bidirectional communication, and is connected to the remote controller 79 in a wired or wireless state.

以上のように構成したことにより、上記一実施例によれば、例えば、次のような作用効果を奏する。   With the configuration described above, according to the above-described embodiment, for example, the following operational effects can be obtained.

冷媒熱により水を加熱して給湯タンク26に湯を貯溜可能とする給湯用熱交換器27が、冷媒を圧縮する圧縮機16を備えたヒートポンプユニット11内に配置され、給湯タンク26が給湯ユニット12内に配置され、給湯用熱交換器27により加熱された湯の熱によって、浴槽用熱交換器28が浴槽14内の湯または水を加熱して保温可能とするよう構成されたことから、高圧の冷媒が流れる冷媒配管19がヒートポンプユニット11内にのみ配設され、ヒートポンプユニット11と給湯ユニット12との間に配設されることがないので、これら高圧の冷媒配管が外部に露出することを防止でき、ヒートポンプ式給湯装置10の安全性を向上させることができる。   A hot water supply heat exchanger 27 that heats water with refrigerant heat and can store hot water in the hot water supply tank 26 is disposed in the heat pump unit 11 including the compressor 16 that compresses the refrigerant, and the hot water supply tank 26 is the hot water supply unit. 12, the heat exchanger 28 for the bathtub is configured to heat the hot water or water in the bathtub 14 by the heat of the hot water heated by the hot water supply heat exchanger 27, so that the heat can be kept. Since the refrigerant pipe 19 through which the high-pressure refrigerant flows is disposed only in the heat pump unit 11 and is not disposed between the heat pump unit 11 and the hot water supply unit 12, these high-pressure refrigerant pipes are exposed to the outside. Can be prevented, and the safety of the heat pump hot water supply apparatus 10 can be improved.

浴槽用熱交換器28は、給湯タンク26内の湯を導く導入水配管75と、浴槽14内の湯または水を導く第1浴槽用水配管51との、浴槽用熱交換器28に対応する部分での接触により、両配管(導入水配管75及び第1浴槽用水配管51)内を流れる湯または水を熱交換可能とするよう構成されたことから、風呂の追い焚き時にヒートポンプユニット11を稼働する必要がなく、エネルギ効率が向上する。また、両配管(導入水配管75及び第1浴槽用水配管51)の内、一方の配管がたとえ損傷しても、他方の配管がその影響を受けることがない。例えば、第1浴槽用水配管51が破損しても、この第1浴槽用水配管51内の、例えば汚染された湯または水が導入水配管75内の湯または水に混入することがないため、この第1浴槽用水配管51を経て給湯タンク26内へ汚染された湯が流入しないので、給湯タンク26内の湯または水を常に清浄に確保できる。   The bathtub heat exchanger 28 is a portion corresponding to the bathtub heat exchanger 28, that is, an introduction water pipe 75 that guides hot water in the hot water supply tank 26 and a first bathtub water pipe 51 that guides hot water or water in the bathtub 14. Since the hot water or water flowing through both pipes (introductory water pipe 75 and first bathtub water pipe 51) can be exchanged by heat, the heat pump unit 11 is operated at the time of bathing. There is no need to improve energy efficiency. Moreover, even if one piping is damaged among both piping (introduction water piping 75 and the 1st bathtub water piping 51), the other piping is not influenced by it. For example, even if the first bathtub water pipe 51 is damaged, for example, contaminated hot water or water in the first bathtub water pipe 51 is not mixed into the hot water or water in the introduction water pipe 75. Since the contaminated hot water does not flow into the hot water supply tank 26 through the first bathtub water pipe 51, the hot water or water in the hot water supply tank 26 can be always kept clean.

ヒートポンプユニット11は、二酸化炭素を冷媒として用いたヒートポンプ冷媒回路Xを備えたため、フロン系冷媒を用いた冷媒回路に比べて、給湯タンク26に貯溜される湯の温度は90℃程度にまで大幅に上昇する。これによれば、給湯タンク26のほぼ中間部26Cの湯温も、50℃程度に維持されることが多い。そうであれば、蛇口13での必要温度は42〜43℃程度が多いため、中間部26Cの湯をそのまま使用することが可能である。   Since the heat pump unit 11 includes the heat pump refrigerant circuit X using carbon dioxide as a refrigerant, the temperature of the hot water stored in the hot water supply tank 26 is greatly increased to about 90 ° C. as compared with the refrigerant circuit using the chlorofluorocarbon refrigerant. To rise. According to this, the hot water temperature in the substantially middle part 26C of the hot water supply tank 26 is often maintained at about 50 ° C. If so, the required temperature at the faucet 13 is often about 42 to 43 ° C., so that the hot water in the intermediate portion 26C can be used as it is.

本実施例では、給湯タンク26の天部26Aには第一開閉弁91を有した天部出湯配管40が接続され、上記給湯タンク26の天部26Aと底部26Bとのほぼ中間部26Cには第二開閉弁92を有した中間部出湯配管33が接続され、これら配管40,33に接続された第一、第二開閉弁91,92は、給湯タンク26の中間部26Cに設置された温度センサ94によって検知される湯温に応じ、制御装置15Bを介して開閉制御される。   In the present embodiment, a top hot water discharge pipe 40 having a first on-off valve 91 is connected to the top portion 26A of the hot water supply tank 26, and a substantially intermediate portion 26C between the top portion 26A and the bottom portion 26B of the hot water supply tank 26 is connected. An intermediate hot water supply pipe 33 having a second open / close valve 92 is connected, and the first and second open / close valves 91 and 92 connected to the pipes 40 and 33 are temperatures set in the intermediate part 26C of the hot water supply tank 26. Depending on the hot water temperature detected by the sensor 94, opening / closing is controlled via the control device 15B.

例えば、温度センサ94によって検知された湯温が、50℃程度であったとすれば、その湯温は蛇口13での必要温度近くに到達している。この場合、第一開閉弁91を閉じ、第二開閉弁92を開く。これにより、中間部26Cの湯を蛇口13から取り出すことが可能になる。   For example, if the hot water temperature detected by the temperature sensor 94 is about 50 ° C., the hot water temperature is close to the required temperature at the faucet 13. In this case, the first on-off valve 91 is closed and the second on-off valve 92 is opened. Thereby, the hot water of the intermediate portion 26 </ b> C can be taken out from the faucet 13.

この場合、混合制御弁57の開度制御により、給湯配管59からの湯と第2水道水配管62からの水道水とが混合されて、蛇口13から給湯される湯の温度が、例えば42℃に調整される。混合制御弁57には、ステッピングモータ等を使用した電動弁が用いられ、混合精度が高く維持される。   In this case, by controlling the opening degree of the mixing control valve 57, hot water from the hot water supply pipe 59 and tap water from the second tap water pipe 62 are mixed, and the temperature of the hot water supplied from the faucet 13 is 42 ° C., for example. Adjusted to As the mixing control valve 57, an electric valve using a stepping motor or the like is used, and the mixing accuracy is maintained high.

中間部26Cの湯温が、例えば蛇口13で必要とされる湯温よりも低い場合、第二開閉弁92を閉じ、第一開閉弁91を開く。これにより、天部26Aの湯が取り出される。この場合も、混合制御弁57の開度制御により、給湯配管59からの湯と第2水道水配管62からの水道水とが混合されて、蛇口13から給湯される湯の温度は、例えば42℃に調整される。   When the hot water temperature of the intermediate portion 26C is lower than the hot water temperature required for the faucet 13, for example, the second on-off valve 92 is closed and the first on-off valve 91 is opened. Thereby, the hot water of the top part 26A is taken out. Also in this case, the temperature of hot water supplied from the faucet 13 by mixing hot water from the hot water supply pipe 59 and tap water from the second tap water pipe 62 by controlling the opening degree of the mixing control valve 57 is 42, for example. Adjusted to ° C.

本実施例によれば、湯を貯溜可能とした給湯タンク26と、圧縮機16、ヒートポンプ熱交換器18、及び冷媒対水熱交換器27を有し、二酸化炭素を有する冷媒を用いたヒートポンプ冷媒回路Xと、前記給湯タンク26内の底部26Bの水を取り出し、前記冷媒対水熱交換器27で前記圧縮機16から吐出された冷媒の熱で加熱した後、その加熱された湯を前記給湯タンク26の天部26Aから給湯タンク26内に戻す給湯用水循環回路Nと、前記給湯タンク26の底部26Bに設けられ、水道水を常時水道水圧がその給湯タンク26内に作用するように供給可能とする第1水道水配管38と、前記給湯タンク26の天部26Aに設けられ、その給湯タンク26内の上部の湯を給湯する天部出湯配管40と、前記給湯タンク26の天部26Aと底部26Bとの中間部26Cに設けられ、その給湯タンク26内の中間部26Cの湯を給湯する中間部出湯配管33と、前記貯湯タンク26内の中間部26の湯温に応じて、前記天部出湯配管40を通じて給湯される湯、或いは中間部出湯配管33を通じて給湯される湯のいずれかを選択する制御装置15Aと、前記天部出湯配管40と中間部出湯配管33が合流した給湯配管59からの湯と水道水とを混合して蛇口13での必要温度の湯を調整する混合制御弁57とを備え、前記給湯タンク26内の中間部26Cの湯温が前記蛇口13での必要される湯温より低い場合に、前記給湯タンク26の天部26A側の湯を取り出して前記給湯配管59に供給する構成としている。   According to the present embodiment, a heat pump refrigerant that has a hot water supply tank 26 capable of storing hot water, a compressor 16, a heat pump heat exchanger 18, and a refrigerant-to-water heat exchanger 27, and uses a refrigerant containing carbon dioxide. The water of the bottom part 26B in the circuit X and the hot water supply tank 26 is taken out and heated by the heat of the refrigerant discharged from the compressor 16 by the refrigerant-to-water heat exchanger 27, and then the heated hot water is used as the hot water supply. A hot water supply water circulation circuit N returning from the top 26A of the tank 26 to the hot water supply tank 26 and a bottom portion 26B of the hot water supply tank 26 are provided so that tap water can be constantly supplied to the hot water supply tank 26. The first tap water pipe 38, the top 26A of the hot water tank 26, the top hot water supply pipe 40 for supplying hot water in the upper part of the hot water tank 26, and the top 26 of the hot water tank 26. The intermediate portion hot water supply pipe 33 for supplying hot water in the intermediate portion 26C in the hot water supply tank 26 and the hot water temperature in the intermediate portion 26 in the hot water storage tank 26 are provided in an intermediate portion 26C between the hot water tank 26 and the bottom portion 26B. A control device 15A that selects either hot water supplied through the top hot water supply pipe 40 or hot water supplied through the intermediate hot water supply pipe 33, and a hot water supply pipe in which the upper hot water supply pipe 40 and the intermediate hot water supply pipe 33 merge. And a mixing control valve 57 for adjusting hot water at a required temperature at the faucet 13 by mixing hot water from 59 and tap water, and the hot water temperature at the intermediate portion 26C in the hot water supply tank 26 is required at the faucet 13. When the temperature is lower than the hot water temperature, the hot water on the top portion 26A side of the hot water supply tank 26 is taken out and supplied to the hot water supply pipe 59.

そのため、給湯タンク26内天部から取り出す約90℃程度の高温の湯のみならず、給湯タンク26内中間部から取り出す約50℃程度の中間温度域の湯を有効に利用できるため、無駄に多量の水道水を混合して給湯することを抑えることができるとともに、不要な沸き上げを抑えることができ、本ヒートポンプ式給湯装置10のエネルギ効率を向上させることができるものである。   Therefore, not only high-temperature hot water of about 90 ° C. taken out from the top of the hot water tank 26 but also hot water in an intermediate temperature range of about 50 ° C. taken out from the middle portion of the hot water tank 26 can be used effectively. Mixing tap water and suppressing hot water supply can be suppressed, and unnecessary boiling can be suppressed, and the energy efficiency of the heat pump hot water supply apparatus 10 can be improved.

以上、本発明を上記一実施例に基づいて説明したが、本発明はこれに限定されるものではない。   As mentioned above, although this invention was demonstrated based on the said one Example, this invention is not limited to this.

本発明に係るヒートポンプ式給湯装置における一実施例を示し、給湯タンク内の水を加熱し、同タンク内に湯を貯溜するときの回路図である。FIG. 2 is a circuit diagram showing an embodiment of the heat pump type hot water supply apparatus according to the present invention, in which water in a hot water supply tank is heated and hot water is stored in the tank. 図1において、蛇口へ給湯するときの回路図である。In FIG. 1, it is a circuit diagram when supplying hot water to a faucet. 図1において、浴槽へ注湯するときの回路図である。In FIG. 1, it is a circuit diagram when pouring into a bathtub. 図1において、浴槽内の湯または水を加熱(追い焚き)して保温するときの回路図である。In FIG. 1, it is a circuit diagram when the hot water or water in a bathtub is heated (it chases), and is kept warm.

符号の説明Explanation of symbols

N 給湯用水循環回路
X ヒートポンプ冷媒回路
10 ヒートポンプ式給湯装置
11 ヒートポンプユニット
12 給湯ユニット
13 蛇口
15B 制御装置(制御手段)
16 圧縮機
18 ヒートポンプ熱交換器
19 冷媒配管
26 給湯タンク
26A 給湯タンクの天部
26B 給湯タンクの底部
26C 給湯タンクの中間部
27 給湯用熱交換器(冷媒対水熱交換器)
33 中間部出湯配管
34 給湯用循環ポンプ(循環ポンプ)
36 給湯用水配管
38 第1水道水配管(水道水配管)
40 天部出湯配管
57 混合制御弁
59 給湯配管
62 第2水道水配管(水道水配管)
N Water supply water circulation circuit X Heat pump refrigerant circuit 10 Heat pump hot water supply device 11 Heat pump unit 12 Hot water supply unit 13 Faucet 15B Control device (control means)
16 Compressor 18 Heat Pump Heat Exchanger 19 Refrigerant Pipe 26 Hot Water Supply Tank 26A Hot Water Tank Top 26B Hot Water Tank Bottom 26C Hot Water Middle Part 27 Hot Water Heat Exchanger (Refrigerant to Water Heat Exchanger)
33 Intermediate hot water piping 34 Hot water supply circulation pump (circulation pump)
36 Hot water supply water pipe 38 First tap water pipe (tap water pipe)
40 Top hot spring piping 57 Mixing control valve 59 Hot water supply piping 62 Second tap water piping (tap water piping)

Claims (3)

湯を貯溜可能とした給湯タンクと、
少なくとも圧縮機、ヒートポンプ熱交換器、及び冷媒対水熱交換器を有し、二酸化炭素を有する冷媒を用いたヒートポンプ冷媒回路と、
前記給湯タンク内の底部の水を取り出し、前記冷媒対水熱交換器で前記圧縮機から吐出された冷媒の熱で加熱した後、その加熱された湯を前記給湯タンクの天部から給湯タンク内に戻す給湯用水循環回路と、
前記給湯タンクの底部に設けられ、水道水を常時水道水圧がその給湯タンク内に作用するように供給可能とする水道水配管と、
前記給湯タンクの天部に設けられ、その給湯タンク内の上部の湯を給湯する天部出湯配管と、
前記給湯タンクの天部と底部との中間部に設けられ、その給湯タンク内の中間部の湯を給湯する中間部出湯配管と、
前記貯湯タンク内の中間部の湯温に応じて、前記天部出湯配管を通じて給湯される湯、或いは中間部出湯配管を通じて給湯される湯のいずれかを選択する制御手段と、
前記天部出湯配管と中間部出湯配管が合流した給湯配管からの湯と水道水とを混合して蛇口での必要温度の湯を調整する混合制御弁とを備え、
前記給湯タンク内の中間部の湯温が前記蛇口での必要される湯温より低い場合に、前記給湯タンクの天部側の湯を取り出して前記給湯配管に供給することを特徴とするヒートポンプ式給湯装置。
A hot water tank that can store hot water,
A heat pump refrigerant circuit having at least a compressor, a heat pump heat exchanger, and a refrigerant-to-water heat exchanger, and using a refrigerant having carbon dioxide;
The water at the bottom of the hot water tank is taken out and heated with the heat of the refrigerant discharged from the compressor in the refrigerant-to-water heat exchanger, and then the heated hot water is introduced from the top of the hot water tank into the hot water tank. A hot water circulation circuit to return to
A tap water pipe that is provided at the bottom of the hot water tank and allows tap water to be supplied so that the tap water pressure always acts in the hot water tank;
A hot water supply pipe provided at the top of the hot water tank, for supplying hot water in the upper part of the hot water tank;
An intermediate hot water supply pipe that is provided at an intermediate portion between the top and bottom of the hot water tank and supplies hot water in the intermediate portion in the hot water tank,
Control means for selecting either hot water supplied through the top hot water supply piping or hot water supplied through the intermediate hot water supply piping according to the hot water temperature in the intermediate portion in the hot water storage tank;
A mixing control valve that adjusts hot water at a faucet by mixing hot water and tap water from the hot water supply pipe where the top hot water supply pipe and the intermediate hot water supply pipe are joined, and
When the hot water temperature at the intermediate portion in the hot water tank is lower than the hot water temperature required at the faucet, the hot water on the top side of the hot water tank is taken out and supplied to the hot water piping. Hot water supply device.
前記給湯タンク内の湯を天部から導出し、浴槽用熱交換器を経て前記給湯タンクの前記中間部へ循環させる循環配管と、
浴槽内の湯または水を前記浴槽用熱交換器へ循環させて前記給湯タンクから導出した湯で加熱する浴槽用水循環回路とを備え、
浴槽内の湯温が適温以下に低下したときに前記加熱が行なわれることを特徴とする請求項1に記載のヒートポンプ式給湯装置。
Deriving hot water in the hot water tank from the top, circulating piping to circulate to the intermediate part of the hot water tank through a heat exchanger for bathtubs;
A water circulation circuit for a bathtub that circulates hot water or water in the bathtub to the heat exchanger for the bathtub and heats it with hot water derived from the hot water tank,
The heat pump type hot water supply apparatus according to claim 1, wherein the heating is performed when the temperature of the hot water in the bathtub is lowered to an appropriate temperature or less.
前記天部出湯配管及び前記循環配管は、それぞれ独立して前記貯湯タンクに取付けられていることを特徴とする請求項2に記載のヒートポンプ式給湯装置。   The heat pump hot water supply apparatus according to claim 2, wherein the top hot water supply pipe and the circulation pipe are independently attached to the hot water storage tank.
JP2006071892A 2006-03-16 2006-03-16 Heat pump type hot-water supply device Pending JP2006153456A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006071892A JP2006153456A (en) 2006-03-16 2006-03-16 Heat pump type hot-water supply device

Related Parent Applications (1)

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JP2004272649A Division JP3819923B2 (en) 2004-09-21 2004-09-21 Heat pump type water heater

Publications (1)

Publication Number Publication Date
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Family

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Family Applications (1)

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Country Link
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