JP2009085565A - Heat pump water heater - Google Patents

Heat pump water heater Download PDF

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JP2009085565A
JP2009085565A JP2007259604A JP2007259604A JP2009085565A JP 2009085565 A JP2009085565 A JP 2009085565A JP 2007259604 A JP2007259604 A JP 2007259604A JP 2007259604 A JP2007259604 A JP 2007259604A JP 2009085565 A JP2009085565 A JP 2009085565A
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heat
heat storage
hot water
storage tank
heat pump
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Kazuhiko Marumoto
一彦 丸本
Takayuki Takatani
隆幸 高谷
Shinji Watanabe
伸二 渡辺
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Panasonic Corp
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Panasonic Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump water heater compact in size capable of simplifying pipe laying work at a site and also being installed in a narrow place. <P>SOLUTION: A heat pump circuit 1 is composed by annularly connecting a compressor 2, a radiator 3, a pressure reducing means 4, and an evaporator 5. Water is fed to the radiator 3 by a heat storage pump 7 and hot water produced by heating water by the radiator 3 is circulated to a heat storage tank 41 containing a built-in latent heat storage body 42. Thereby, the latent heat storage body 42 stores heat. The heat pump circuit 1 and the heat storage tank 41 are arranged in one casing 44. Since a latent heat storage material 42 is used as a heat storage material in the heat storage tank 41, a heat capacity can be increased in comparison with water. Since the heat pump circuit 1 and the heat storage tank 41 are stored in one casing 44, the pipe laying work can be simplified in the site. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明はヒートポンプで加熱した湯を循環して熱を蓄熱材に蓄えて給湯を行うヒートポンプ給湯機に関するものである。   The present invention relates to a heat pump water heater that circulates hot water heated by a heat pump and stores hot heat in a heat storage material to supply hot water.

従来、ヒートポンプ給湯機としては加熱源であるヒートポンプ回路と水道水を貯留する貯湯タンクを現地で配管接続する方式が開発され、オール電化の住宅、マンションなどで新たなインフラの整備を必要とせず手軽に設置する事ができ、またヒートポンプ式であるため入力に対する能力は３倍以上確保可能となるため熱効率が良く、徐々に普及してきている。   Conventionally, a heat pump water heater has been developed that connects a heat pump circuit, which is a heating source, and a hot water storage tank, which stores tap water, on-site, making it easy to use all-electric housing and condominiums without the need for new infrastructure. In addition, since it is a heat pump type, the capacity for input can be secured more than three times, so the heat efficiency is good and it is gradually spreading.

また、さらに、狭小地などへの設置を狙いとし、ヒートポンプ回路と貯湯タンクを一体にしてコンパクト化すると共に、現地での配管工事を簡略できる製品が発売されている。   In addition, with the aim of installing in narrow spaces, products that can simplify the piping work in the field are being released while reducing the size of the heat pump circuit and hot water storage tank.

このようなヒートポンプ給湯機としては、以下に記載されているようなものがある（例えば、特許文献１参照）。   Examples of such a heat pump water heater include those described below (see, for example, Patent Document 1).

このヒートポンプ給湯機は、図２に示すように、水道水を貯湯する貯湯タンク８と、加熱源であるヒートポンプ回路１を備え、貯湯タンク８の下部から沸上げ管９でヒートポンプ回路１と接続し、ヒートポンプ回路１から貯湯タンク８上部へ接続している。   As shown in FIG. 2, this heat pump water heater includes a hot water storage tank 8 for storing hot water and a heat pump circuit 1 as a heating source, and is connected to the heat pump circuit 1 from the lower portion of the hot water storage tank 8 by a boiling pipe 9. The heat pump circuit 1 is connected to the upper part of the hot water storage tank 8.

沸き上げ管９の途中に水道水とヒートポンプ回路１内の冷媒が熱交換する放熱器３を設置し、放熱器３で所定の温度に暖められた水道水を貯湯タンク８に循環して高温の湯として貯留する。   A radiator 3 is installed in the middle of the heating pipe 9 to exchange heat between the tap water and the refrigerant in the heat pump circuit 1, and the tap water heated to a predetermined temperature by the radiator 3 is circulated to the hot water storage tank 8 to generate a high temperature. Store as hot water.

また、貯湯タンク８と圧縮機２と放熱器３とを一体型の本体ユニット４０に収納する構成となっている。
特開２００５−１６１４１５８号公報 Further, the hot water storage tank 8, the compressor 2, and the radiator 3 are housed in an integrated main body unit 40.
JP 2005-1614158 A

しかしながら、上記の構成では、貯湯タンクに貯留する水の熱容量が小さいため、例え高温の湯を貯留したとしても、貯湯タンクの内容量が大きくなるので、狭小地への設置を狙いとしたヒートポンプ給湯機としてコンパクト性に課題を有していた。   However, in the above configuration, the heat capacity of the water stored in the hot water storage tank is small, so even if hot water is stored, the internal capacity of the hot water storage tank will increase, so heat pump hot water supply aimed at installation in a narrow area The machine had a problem with compactness.

本発明は、現地での配管工事を簡略すると共に、よりコンパクトなヒートポンプ給湯機を提供することを目的とする。   An object of the present invention is to provide a more compact heat pump water heater while simplifying the piping work on site.

上記目的を達成するために本発明のヒートポンプ給湯機は、圧縮機、放熱器、減圧手段及び蒸発器を環状に接続して構成されるヒートポンプ回路と、蓄熱ポンプにより前記放熱器に水を送り、前記放熱器にて加熱され生成したお湯を、潜熱蓄熱体を内蔵した蓄熱タンクに循環させることで、前記潜熱蓄熱体に蓄熱するよう構成するとともに、前記ヒートポンプ回路、前記蓄熱タンクを一つの筐体内に配設したことを特徴とするもので、蓄熱タンク内の蓄熱材に潜熱蓄熱材を用いたので、水に比べて熱容量を大きくすることができる。またヒートポンプ回路と蓄熱タンクを一つの筐体に納める構成としたので、現地での配管工事を簡略できる。   In order to achieve the above object, the heat pump water heater of the present invention is a heat pump circuit configured by annularly connecting a compressor, a radiator, a decompression means, and an evaporator, and sends water to the radiator by a heat storage pump, The hot water generated by heating with the radiator is circulated through a heat storage tank having a built-in latent heat storage body so as to store heat in the latent heat storage body, and the heat pump circuit and the heat storage tank are arranged in one housing. Since the latent heat storage material is used as the heat storage material in the heat storage tank, the heat capacity can be increased as compared with water. In addition, since the heat pump circuit and the heat storage tank are housed in a single housing, piping work at the site can be simplified.

本発明によれば、現地での配管工事を簡略すると共に、よりコンパクトなヒートポンプ給湯機を提供できる。   According to the present invention, it is possible to provide a more compact heat pump water heater while simplifying on-site piping work.

第１の発明は、圧縮機、放熱器、減圧手段及び蒸発器を環状に接続して構成されるヒートポンプ回路と、蓄熱ポンプにより前記放熱器に水を送り、前記放熱器にて加熱され生成したお湯を、潜熱蓄熱体を内蔵した蓄熱タンクに循環させることで、前記潜熱蓄熱体に蓄熱するよう構成するとともに、前記ヒートポンプ回路、前記蓄熱タンクを一つの筐体内に配設したことを特徴とするもので、蓄熱タンク内の蓄熱材に潜熱蓄熱材を用いたので、水に比べて熱容量を大きくすることができる。またヒートポンプ回路と蓄熱タンクを一つの筐体に納める構成としたので、現地での配管工事を簡略できる。   1st invention sent the water to the said heat radiator with the heat pump circuit comprised by connecting a compressor, a heat radiator, pressure reduction means, and an evaporator cyclically, and the heat storage pump, and it was heated and produced | generated with the said heat radiator. The hot water is circulated through a heat storage tank having a built-in latent heat storage body so as to store heat in the latent heat storage body, and the heat pump circuit and the heat storage tank are arranged in one casing. Since the latent heat storage material is used as the heat storage material in the heat storage tank, the heat capacity can be increased compared to water. In addition, since the heat pump circuit and the heat storage tank are housed in a single housing, piping work at the site can be simplified.

第２の発明は、特に第１の発明において、圧縮機と放熱器間との冷媒の高低圧力差を動力或いは電力に変換する膨張機を、ヒートポンプ回路に搭載したことを特徴とするもので、高圧冷媒が膨張する時、損失となっていた動力を回収して圧縮機動力として利用できるので、ヒートポンプ回路の効率を向上できる。   The second invention is characterized in that, in the first invention, in particular, an expander that converts a high and low pressure difference of refrigerant between the compressor and the radiator into power or electric power is mounted in a heat pump circuit. When the high-pressure refrigerant expands, the lost power can be recovered and used as compressor power, so that the efficiency of the heat pump circuit can be improved.

第３の発明は、特に第１または２の発明において、ヒートポンプ回路は、冷媒を臨界圧力以上に昇圧して運転することを特徴とするもので、放熱器で熱を奪われて温度低下しても凝縮することがない。したがって放熱器全域で冷媒と潜熱蓄熱材とに温度差を形成しやすくなり熱交換効率を高くできる。   In a third aspect of the invention, particularly in the first or second aspect of the invention, the heat pump circuit is characterized in that the refrigerant is operated at a pressure higher than the critical pressure. Will not condense. Therefore, it is easy to form a temperature difference between the refrigerant and the latent heat storage material over the entire radiator, and the heat exchange efficiency can be increased.

（第１の実施の形態）
以下、第１の実施の形態による給湯機について図面を用いて説明する。図１は本発明の実施の形態おけるヒートポンプ給湯機の回路図である。背景技術と同じ動作の構成については同一記号を付している。 (First embodiment)
Hereinafter, the water heater according to the first embodiment will be described with reference to the drawings. FIG. 1 is a circuit diagram of a heat pump water heater in an embodiment of the present invention. The same symbol is attached to the same operation configuration as the background art.

本装置の概要は、加熱源であるヒートポンプ回路１により加熱した水を蓄熱ポンプ７を用いて循環して、蓄熱タンク４１内の潜熱蓄熱体４２に温熱を蓄熱する。一方、蓄熱タンク４１底部より給水された冷水を蓄熱タンク４１内の蓄熱体４２と熱交換することで高温の湯として、給湯や風呂湯などに利用するものである。   The outline of this apparatus circulates the water heated by the heat pump circuit 1 which is a heating source by using the heat storage pump 7 to store the heat in the latent heat storage body 42 in the heat storage tank 41. On the other hand, cold water supplied from the bottom of the heat storage tank 41 is exchanged with the heat storage body 42 in the heat storage tank 41 so as to be used as hot water or hot water as hot water.

まず、ヒートポンプ回路１の構成について説明する。   First, the configuration of the heat pump circuit 1 will be described.

ヒートポンプ回路１は、冷媒を圧縮する圧縮機２、冷媒を冷却する放熱器３、冷媒を減圧する減圧手段４、冷媒の高低圧力差を動力或いは電力に変換する膨張機４３と冷媒を蒸発気化する蒸発器５で構成されている。圧縮機２の吐出側より放熱器３を介して減圧手段４と並列に設置された膨張機４３に接続し、蒸発器５を通って、圧縮機２の吸入側に接続している。   The heat pump circuit 1 evaporates and evaporates the refrigerant, the compressor 2 that compresses the refrigerant, the radiator 3 that cools the refrigerant, the decompression means 4 that depressurizes the refrigerant, the expander 43 that converts the pressure difference of the refrigerant into power or electric power. An evaporator 5 is used. The compressor 2 is connected to the expander 43 installed in parallel with the decompression means 4 through the radiator 3 from the discharge side, and is connected to the suction side of the compressor 2 through the evaporator 5.

また、このヒートポンプ回路１においては、冷媒として炭酸ガスが用いられており、圧縮機２によって圧縮された冷媒は、高温高圧の超臨界状態の冷媒として放熱器３に入り、ここで放熱して冷却する。その後、減圧手段４及び膨張機４３において減圧されて低温低圧の湿り蒸気となり、蒸発器５で空気と熱交換して蒸発気化し圧縮機２へ戻される。
さらにまた、蓄熱タンク４１に関する構成は、蓄熱タンク４１内に流入する湯又は水と熱交換できるように、潜熱蓄熱材で構成された潜熱蓄熱体４２を配置している。 Further, in this heat pump circuit 1, carbon dioxide is used as the refrigerant, and the refrigerant compressed by the compressor 2 enters the radiator 3 as a high-temperature and high-pressure supercritical refrigerant, and radiates and cools it here. To do. Thereafter, the pressure is reduced in the pressure reducing means 4 and the expander 43 to become low-temperature and low-pressure wet steam, and heat is exchanged with air in the evaporator 5 to evaporate and return to the compressor 2.
Furthermore, the structure regarding the heat storage tank 41 arrange | positions the latent heat storage body 42 comprised with the latent heat storage material so that heat exchange with the hot water or water which flows in in the heat storage tank 41 is possible.

一方、湯の沸き上げに関する構成は、沸上げ管９は蓄熱タンク４１の下部からヒートポ
ンプ回路１と接続し、ヒートポンプ回路１から蓄熱タン４１上部へ接続している。沸上げ管９が接続されている蓄熱タンク４１上部とは、湯水が蓄熱タンク４１の高温層側であればよく、また、蓄熱タンク４１の下部とは、湯水が貯湯タンクの低温層側であればよい。 On the other hand, in the configuration relating to boiling of hot water, the boiling pipe 9 is connected to the heat pump circuit 1 from the lower part of the heat storage tank 41, and is connected from the heat pump circuit 1 to the upper part of the heat storage tank 41. The upper part of the heat storage tank 41 to which the boiling pipe 9 is connected is sufficient if the hot water is on the high temperature layer side of the heat storage tank 41, and the lower part of the heat storage tank 41 is that the hot water is on the low temperature layer side of the hot water storage tank. That's fine.

蓄熱タンク４１からヒートポンプ回路１に水を送り蓄熱タンク４１に戻すために、沸上げ管９の途中に出力を任意に変化させることができる蓄熱ポンプ７を設けている。
また、ヒートポンプ回路１において加熱する前の低湯水の温度を検知する入水温度センサー１５を沸上げ管９のヒートポンプ回路１入口側近傍に、加熱した高湯水の温度を検知する出湯温度センサー１６を沸上げ管９におけるヒートポンプ回路１出口近傍に設けている。 In order to send water from the heat storage tank 41 to the heat pump circuit 1 and return it to the heat storage tank 41, a heat storage pump 7 capable of arbitrarily changing the output in the middle of the boiling pipe 9 is provided.
In addition, a hot water temperature sensor 16 for detecting the temperature of the heated hot water is boiled in the vicinity of the heat pump circuit 1 inlet side of the boiling pipe 9 at the inlet temperature sensor 15 for detecting the temperature of the low hot water before heating in the heat pump circuit 1. It is provided in the vicinity of the outlet of the heat pump circuit 1 in the raising pipe 9.

給湯に関する構成としては、蓄熱タンク４１の底部に給水源から給水を行う給水管１９が接続され、給水源からは減圧弁２０にて適度な圧力に減圧されて給水管１９に給水される。   As a configuration related to hot water supply, a water supply pipe 19 that supplies water from a water supply source is connected to the bottom of the heat storage tank 41, and the water supply source 19 supplies the water supply pipe 19 with a pressure reduced to an appropriate pressure by a pressure reducing valve 20.

蓄熱タンク４１上部には貯湯された高温水を出湯し給湯に利用するための給湯管２１が接続され、その途中には給水管１９からの給水バイパス管２２が接続されている。また、給湯管２１からの高温水と給水バイパス管２２からの低湯水を任意の比率で混合可能な混合弁２３が設けられている。   Connected to the upper part of the heat storage tank 41 is a hot water supply pipe 21 for discharging the hot water stored in the hot water and using it for hot water supply, and a water supply bypass pipe 22 from the water supply pipe 19 is connected in the middle thereof. Moreover, the mixing valve 23 which can mix the high temperature water from the hot water supply pipe 21 and the low hot water from the water supply bypass pipe 22 in arbitrary ratios is provided.

混合弁２３の下流側には、混合された給湯温度を検知するために給湯温度センサー２５が設けられ、その先に給湯端末２４が接続されている。   On the downstream side of the mixing valve 23, a hot water supply temperature sensor 25 is provided to detect the mixed hot water supply temperature, and a hot water supply terminal 24 is connected to the end thereof.

風呂への注湯に関する構成としては、給湯管２１の途中から分岐して、浴槽１３へ注湯する注湯管２８が設けられており、給湯管２１と同様に、給湯管２１からの高湯水と給水バイパス管２２からの低温の湯水を混合して注湯できるように風呂用混合弁２６が設けられ、その下流には注湯温度センサー３５が設けられている。
また、注湯管２８は注湯電磁弁２７を備え、それを任意に開閉させて自動で浴槽１３に注湯を行う。 As a configuration related to pouring water into the bath, a hot water pipe 28 branched from the middle of the hot water pipe 21 and poured into the bathtub 13 is provided. Like the hot water pipe 21, high hot water from the hot water pipe 21 is provided. A bath mixing valve 26 is provided so that the hot water from the water supply bypass pipe 22 can be mixed and poured, and a pouring temperature sensor 35 is provided downstream thereof.
Moreover, the pouring pipe 28 is provided with a pouring electromagnetic valve 27, which is arbitrarily opened and closed to pour water into the bathtub 13 automatically.

浴槽１３内の湯水を加熱、保温する風呂加熱運転の回路構成に関しては、利用側回路３１においては、浴槽１３内の湯水を利用側ポンプ１２により風呂熱交換器１４に循環させている。また、浴槽内１３の温度を検知するために風呂湯温センサー３２を設けている。そして、蓄熱タンク４１の湯水を熱源側ポンプ１１により風呂熱交換器１４に循環して蓄熱タンク４１に環流する。   Regarding the circuit configuration of the bath heating operation for heating and keeping hot water in the bathtub 13, in the use side circuit 31, the hot water in the bathtub 13 is circulated to the bath heat exchanger 14 by the use side pump 12. In addition, a bath water temperature sensor 32 is provided to detect the temperature in the bathtub 13. Then, the hot water in the heat storage tank 41 is circulated to the bath heat exchanger 14 by the heat source side pump 11 and circulated to the heat storage tank 41.

また、風呂熱交換器１４より利用側ポンプ１１で循環し環流された湯水の温度を検知するための環流温度センサー３３が取り付けられており、風呂熱交換器１４を循環した湯水を蓄熱タンク４１下部へ環流するように構成されている。   Further, a circulating temperature sensor 33 for detecting the temperature of hot water circulated and circulated from the bath heat exchanger 14 by the use side pump 11 is attached, and the hot water circulated through the bath heat exchanger 14 is converted into the lower part of the heat storage tank 41. It is configured to recirculate.

また、ヒートポンプ、給湯、風呂に関する構成部品は一つの筐体４４に納められている。   In addition, components related to the heat pump, hot water supply, and bath are housed in a single housing 44.

以上のように構成された給湯機において、以下、図１に基づいて動作、作用について説明する。   In the water heater configured as described above, the operation and action will be described below with reference to FIG.

蓄熱タンク４１に蓄熱する蓄熱運転では、圧縮機２によって圧縮された冷媒は、高温高圧の超臨界状態の冷媒として放熱器３に入り、ここで放熱して冷却する。その後、減圧手段４および膨張機４３を通過した冷媒は減圧されて低温低圧の湿り蒸気となり、蒸発器５において空気と熱交換して蒸発気化し圧縮機２へ戻される。この時、膨張機４３では冷媒
の高低圧差のエネルギーを回収して、圧縮機２の動力の一部として利用している。 In the heat storage operation in which heat is stored in the heat storage tank 41, the refrigerant compressed by the compressor 2 enters the radiator 3 as a high-temperature and high-pressure supercritical refrigerant and radiates and cools it here. Thereafter, the refrigerant that has passed through the decompression means 4 and the expander 43 is decompressed to become low-temperature and low-pressure wet steam, and heat is exchanged with air in the evaporator 5 to evaporate and return to the compressor 2. At this time, the expander 43 collects the energy of the high / low pressure difference of the refrigerant and uses it as a part of the power of the compressor 2.

また、この時、蓄熱タンク４１の下部にある低温層の湯水は沸上げポンプ７により放熱器３に送られ放熱器３の熱を吸熱して加熱される。そして、蓄熱タンク４１の下部にある低温層の湯水をヒートポンプ回路１により加熱し、蓄熱タンク４１に戻す運転においては、蓄熱ポンプ７を駆動し、蓄熱タンク４１からの低湯水を加熱し、加熱された湯は沸き上げ管９を通って蓄熱タンク４１の上部に送られる。   At this time, the low temperature hot water in the lower part of the heat storage tank 41 is sent to the radiator 3 by the boiling pump 7 and is heated by absorbing the heat of the radiator 3. And in the driving | operation which heats the low temperature hot water in the lower part of the heat storage tank 41 with the heat pump circuit 1, and returns to the heat storage tank 41, the heat storage pump 7 is driven and the low hot water from the heat storage tank 41 is heated and heated. The hot water is sent to the upper part of the heat storage tank 41 through the boiling pipe 9.

ヒートポンプ回路１と蓄熱タンク４１が一つの筐体４４に納められているので、沸き上げ管９は一定の長さで短く熱ロスも少なく、また現地での施工工事が不要である。   Since the heat pump circuit 1 and the heat storage tank 41 are housed in a single housing 44, the heating pipe 9 is short in length and has little heat loss, and no construction work on site is required.

また、出湯温度センサー１６によりヒートポンプ回路１で加熱された水の温度を検知し、蓄熱ポンプ７の出力を変えることで、ヒートポンプ回路１からの出湯温度を制御して目標の温度となるように加熱を行う。   Further, the temperature of water heated by the heat pump circuit 1 is detected by the tapping temperature sensor 16 and the output of the heat storage pump 7 is changed to control the tapping temperature from the heat pump circuit 1 so as to reach the target temperature. I do.

即ち、蓄熱タンク４１の底部より低温層の水を加熱してヒートポンプ回路１で目標温度に加熱された湯は再び蓄熱タンク４１に循環し、この循環によって高温となった湯水の熱を潜熱蓄熱体４２が吸収して高温となる熱交換を行う。熱交換した高温の湯水は低温の水となって、蓄熱タンク４１に底部に送られて、再びヒートポンプ回路１で加熱される。この循環の繰り返しにより潜熱蓄熱体４２に熱が蓄えられる。   That is, the hot water heated to the target temperature by the heat pump circuit 1 is heated again to the heat storage tank 41 from the bottom of the heat storage tank 41 and heated to the target temperature, and the heat of the hot water heated by this circulation is transferred to the latent heat storage body. The heat exchange which 42 absorbs becomes high temperature. The hot hot water subjected to heat exchange becomes low-temperature water, is sent to the bottom of the heat storage tank 41, and is heated again by the heat pump circuit 1. Heat is stored in the latent heat storage body 42 by repeating this circulation.

特に、潜熱蓄熱体４２への蓄熱終了時には潜熱蓄熱体４２は高温となり、それ以上熱交換できなくなるため、湯水の温度は低下しなくなるこのような沸き終い運転時には、高圧圧力が上昇し高低圧力差が大きくヒートポンプ回路１のエネルギー効率は低下するが、高低圧力差が大きいため膨張機４３の効率は向上することになり、沸き終いのエネルギー効率向上手段として有効である。   In particular, at the end of the heat storage in the latent heat storage body 42, the latent heat storage body 42 becomes high temperature, and heat exchange cannot be performed any more, so that the temperature of the hot water does not decrease. Although the difference is large and the energy efficiency of the heat pump circuit 1 is reduced, the efficiency of the expander 43 is improved due to the large difference between the high and low pressures, which is effective as an energy efficiency improving means at the end of boiling.

そして、給湯端末２４より利用者に湯を供給する、給湯運転では、給湯端末２４の利用が開始されると、蓄熱タンク４１内の湯水が給湯管２１から出湯されるとともに、給水管１９から蓄熱タンク４１に給水される。この時、供給された低温の給水と潜熱蓄熱体４２が熱交換して高温の湯となる。一方、潜熱蓄熱体４２の温度は徐々に低下することになる。   In the hot water supply operation in which hot water is supplied to the user from the hot water supply terminal 24, when the use of the hot water supply terminal 24 is started, hot water in the heat storage tank 41 is discharged from the hot water supply pipe 21 and stored in the heat storage pipe 19. Water is supplied to the tank 41. At this time, the supplied low-temperature water supply and the latent heat storage body 42 exchange heat to form high-temperature hot water. On the other hand, the temperature of the latent heat storage body 42 gradually decreases.

また、給水バイパス管２２により給水を分岐し、蓄熱タンク４１からの高湯水と給水からの低湯水を混合弁２３において混合比を変えて混合することで、給湯温度を変化させて給湯端末２４に給湯する。この時の混合比は給湯温度センサー２５で検知される給湯温度に応じて制御され、所定の給湯温度に保たれる給湯が行われる。また、風呂加熱運転では、蓄熱タンク４１内の熱を浴槽１３内の湯水に放熱することで行っている。   Further, the hot water from the heat storage tank 41 and the hot hot water from the hot water are mixed by changing the mixing ratio in the mixing valve 23, thereby changing the hot water temperature to the hot water supply terminal 24. Hot water. The mixing ratio at this time is controlled in accordance with the hot water temperature detected by the hot water temperature sensor 25, and hot water is maintained at a predetermined hot water temperature. In the bath heating operation, the heat in the heat storage tank 41 is radiated to the hot water in the bathtub 13.

風呂湯温センサー３２によって所定の風呂湯温より低く、風呂の加熱が必要であると判断された場合、熱源側回路３０では熱源側ポンプ１１を運転して風呂熱交換器１４に蓄熱タンク４１の高温の湯を循環させる。風呂熱交換器１４で熱交換して温度の下がった水は蓄熱タンク４１の底部に送られて蓄熱タンク４１内の潜熱蓄熱体４２と熱交換して高温の湯となって再び風呂熱交換器１４に循環される。   When the bath temperature sensor 32 determines that the bath temperature is lower than the predetermined bath temperature, and the heating of the bath is necessary, the heat source side circuit 30 operates the heat source side pump 11 to the bath heat exchanger 14 to store the heat storage tank 41. Circulate hot water. The water whose temperature has been reduced by the heat exchange in the bath heat exchanger 14 is sent to the bottom of the heat storage tank 41 to exchange heat with the latent heat storage body 42 in the heat storage tank 41 to form hot water again. 14 is circulated.

一方、利用側回路３１では浴槽１３内の湯水を利用側ポンプ１２により風呂熱交換器１４に循環させ熱源側回路３０の熱を浴槽１３内の湯水に吸収して温度を上昇させ、風呂湯温センサー３２によって所定の風呂湯温に達したと判断されるまで継続される。
この様に、蓄熱タンク内の蓄熱材に潜熱蓄熱材を用い、水に比べて熱容量を大きくすることができるので貯湯タンクの外形を小さくでき、またヒートポンプと蓄熱タンクを一つの
筐体に納める構成としたので、現地での配管工事を簡略できると共に、コンパクトに構成できる。 On the other hand, in the use side circuit 31, the hot water in the bathtub 13 is circulated to the bath heat exchanger 14 by the use side pump 12, and the heat in the heat source side circuit 30 is absorbed by the hot water in the bathtub 13 to increase the temperature. The process is continued until it is determined by the sensor 32 that the predetermined bath water temperature has been reached.
In this way, using a latent heat storage material as the heat storage material in the heat storage tank, the heat capacity can be increased compared to water, so the external shape of the hot water storage tank can be reduced, and the heat pump and the heat storage tank are housed in one housing As a result, piping work at the site can be simplified and a compact configuration can be achieved.

以上のように、本発明にかかるヒートポンプ給湯機は、蓄熱タンク内の蓄熱材に潜熱蓄熱材を用い、水に比べて熱容量を大きくすることができるので貯湯タンクの外形を小さくでき、またヒートポンプ回路と蓄熱タンクを一つの筐体に納める構成としたので、現地での配管工事を簡略できると共に、コンパクトな給湯機として有用である。   As described above, the heat pump water heater according to the present invention uses a latent heat storage material as the heat storage material in the heat storage tank, and can increase the heat capacity compared to water, so the outer shape of the hot water storage tank can be reduced, and the heat pump circuit The heat storage tank is housed in a single housing, which simplifies piping work on site and is useful as a compact water heater.

本発明の実施の形態１におけるヒートポンプ給湯機の回路図Circuit diagram of heat pump water heater in Embodiment 1 of the present invention 従来のヒートポンプ給湯機の回路図Circuit diagram of conventional heat pump water heater

符号の説明Explanation of symbols

１ ヒートポンプ回路
２ 圧縮機
３ 放熱器
４ 減圧手段
５ 蒸発器
７ 蓄熱ポンプ
４１ 蓄熱タンク
４２ 潜熱蓄熱体
４３ 膨張機
４４ 筐体
DESCRIPTION OF SYMBOLS 1 Heat pump circuit 2 Compressor 3 Radiator 4 Depressurization means 5 Evaporator 7 Thermal storage pump 41 Thermal storage tank 42 Latent heat storage body 43 Expander 44 Case

Claims (3)

圧縮機、放熱器、減圧手段及び蒸発器を環状に接続して構成されるヒートポンプ回路と、蓄熱ポンプにより前記放熱器に水を送り、前記放熱器にて加熱され生成したお湯を、潜熱蓄熱体を内蔵した蓄熱タンクに循環させることで、前記潜熱蓄熱体に蓄熱するよう構成するとともに、前記ヒートポンプ回路、前記蓄熱タンクを一つの筐体内に配設したことを特徴とするヒートポンプ給湯機。 A heat pump circuit configured by annularly connecting a compressor, a radiator, a decompression unit and an evaporator, and water is sent to the radiator by a heat storage pump, and hot water generated by the radiator is generated as a latent heat storage body. The heat pump water heater is configured to store heat in the latent heat storage body by circulating it in a heat storage tank containing the heat pump, and the heat pump circuit and the heat storage tank are disposed in one housing. 圧縮機と放熱器間との冷媒の高低圧力差を動力或いは電力に変換する膨張機を、ヒートポンプ回路に搭載したことを特徴とする請求項１に記載のヒートポンプ給湯機。 2. The heat pump water heater according to claim 1, wherein an expander that converts a difference in pressure between the refrigerant and the compressor between the compressor and the radiator into motive power or electric power is mounted in a heat pump circuit. ヒートポンプ回路は、冷媒を臨界圧力以上に昇圧して運転することを特徴とする請求項１または２記載のヒートポンプ給湯機。 The heat pump water heater according to claim 1 or 2, wherein the heat pump circuit is operated by boosting the refrigerant to a critical pressure or higher.
JP2007259604A 2007-10-03 2007-10-03 Heat pump water heater Pending JP2009085565A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102654308A (en) * 2012-05-10 2012-09-05 江苏启能新能源材料有限公司 Phase-change heat storage type electric water heater
KR101294063B1 (en) 2011-08-19 2013-08-07 현대자동차주식회사 Reducing agent freezing prevention device
CN103968531A (en) * 2013-02-04 2014-08-06 钟炽昌 Heat scattering photo-thermal safe energy-saving water heater
CN104990263A (en) * 2015-08-07 2015-10-21 冉碧玉 Heat storage type heater and regenerative type heating method thereof
WO2023017573A1 (en) 2021-08-11 2023-02-16 三菱電機株式会社 Water heater

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101294063B1 (en) 2011-08-19 2013-08-07 현대자동차주식회사 Reducing agent freezing prevention device
CN102654308A (en) * 2012-05-10 2012-09-05 江苏启能新能源材料有限公司 Phase-change heat storage type electric water heater
CN103968531A (en) * 2013-02-04 2014-08-06 钟炽昌 Heat scattering photo-thermal safe energy-saving water heater
CN104990263A (en) * 2015-08-07 2015-10-21 冉碧玉 Heat storage type heater and regenerative type heating method thereof
WO2023017573A1 (en) 2021-08-11 2023-02-16 三菱電機株式会社 Water heater

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