JP2009216336A - Heat pump water heater - Google Patents

Heat pump water heater Download PDF

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JP2009216336A
JP2009216336A JP2008062183A JP2008062183A JP2009216336A JP 2009216336 A JP2009216336 A JP 2009216336A JP 2008062183 A JP2008062183 A JP 2008062183A JP 2008062183 A JP2008062183 A JP 2008062183A JP 2009216336 A JP2009216336 A JP 2009216336A
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hot water
heat
heat pump
water storage
bathtub
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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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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

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  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump water heater having higher efficiency, by reducing a heat loss from a connecting pipe, by extremely shortening the connecting pipe, while reducing man-hours for connecting the connecting pipe at a job site. <P>SOLUTION: This heat pump water heater is composed of a heat pump 1 constituted by annularly connecting a compressor 2, a radiator 3, a pressure reducing means 4 and a heat absorber 5, a hot water storage circuit 18 for storing high temperature hot water in a hot water storage tank 8 by circulating water to the radiator 3 from a bottom part of the hot water storage tank 8 by a blow out pump 7 and a bathtub circuit 34 having a bath heat recovery heat exchanger 38 for exchanging heat between a refrigerant up to the compressor 2 from an outlet of the pressure reducing means 4 and the hot water of a bathtub 13. Since the heat pump 1, the hot water storage circuit 18 and the bathtub circuit 34 are wholly stored in an integral unit 39, man-hours for connecting the connecting pipe at a job site can be reduced, and the heat loss from the connecting pipe can be reduced, so that heat efficiency can be improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、加熱した湯水を貯湯槽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 supplies hot water by storing heated hot water in a hot water storage tank.

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１と水道水を貯留する貯湯タンク８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, as a heat pump water heater, a system has been developed in which a heat pump 1 as a heating source and a hot water storage tank 8 for storing tap water are connected to each other by piping, and it is necessary to develop new infrastructure in all-electric houses and condominiums. It is easy to install, and since it is a heat pump type, the capacity for input can be secured more than three times, so it has good thermal efficiency and is gradually spreading.

また、さらなる効率向上の手段として、入浴後の風呂に貯まったお湯から熱を回収して、その熱を再び高温の湯を沸かすために使用するようにした技術も提案されている（例えば、特許文献１参照）。   In addition, as a means of further improving efficiency, a technique has been proposed in which heat is recovered from hot water stored in a bath after bathing and used to boil hot water again (for example, a patent) Reference 1).

図２は、上記特許文献１に記載された従来のヒートポンプ給湯機の回路図である。   FIG. 2 is a circuit diagram of a conventional heat pump water heater described in Patent Document 1.

図２において、従来のヒートポンプ給湯機の概要は、低温の湯水と高温の湯水とが層を成した状態で貯えられている貯湯タンク８と、その湯水を加熱する加熱源であるヒートポンプ１を備え、ヒートポンプ１によって貯湯タンク８の水を加熱して沸き上げて貯湯し給湯に利用される。   In FIG. 2, the outline of a conventional heat pump water heater includes a hot water storage tank 8 in which low temperature hot water and high temperature hot water are stored in a layered state, and a heat pump 1 that is a heating source for heating the hot water. The water in the hot water storage tank 8 is heated and boiled by the heat pump 1 to be stored and used for hot water supply.

加熱源であるヒートポンプ１は、冷媒を圧縮する圧縮機２と、冷媒を冷却する放熱器３と、冷媒を減圧する減圧手段４と、冷媒を蒸発気化する吸熱器５で構成され、圧縮機２の吐出側より放熱器３を介して減圧手段４に接続し、さらに圧縮機２の吸入側に接続している。圧縮機２によって圧縮された冷媒は、高温高圧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において減圧されて低温低圧の湿り蒸気となり、吸熱器５で空気と熱交換して蒸発気化し圧縮機２へ戻される。この時、送風機６は、吸熱器５の熱交換効率を高めるために強制的に大気を吸熱器５に循環させる。   A heat pump 1 as a heating source includes a compressor 2 that compresses a refrigerant, a radiator 3 that cools the refrigerant, a decompression unit 4 that decompresses the refrigerant, and a heat absorber 5 that evaporates and evaporates the refrigerant. The discharge side of the compressor 2 is connected to the decompression means 4 via the radiator 3 and further connected to the suction side of the compressor 2. The refrigerant compressed by the compressor 2 enters the radiator 3 as a high-temperature and high-pressure refrigerant, where it dissipates heat and cools it. Thereafter, the pressure is reduced in the pressure reducing means 4 to form low-temperature and low-pressure wet steam, and the heat absorber 5 exchanges heat with air to evaporate and return to the compressor 2. At this time, the blower 6 forcibly circulates air to the heat absorber 5 in order to increase the heat exchange efficiency of the heat absorber 5.

一方、湯の沸き上げに関する貯湯回路１８の構成は、沸上げ管９が、貯湯タンク８の下部から貯湯接続管４３ｂを通して放熱器３に接続され、さらに貯湯接続管４３ａを通して放熱器３から貯湯タンク８の上部に接続されている。   On the other hand, in the configuration of the hot water storage circuit 18 related to boiling of hot water, the boiling pipe 9 is connected to the radiator 3 through the hot water storage connection pipe 43b from the lower part of the hot water storage tank 8, and further from the radiator 3 through the hot water storage connection pipe 43a. 8 is connected to the top.

沸上げ管９が接続されている貯湯タンク８の上部とは、湯水が貯湯タンク８の高温層側であればよく、また、貯湯タンク８の下部とは、湯水が貯湯タンク８の低温層側であればよい。   The upper part of the hot water storage tank 8 to which the boiling pipe 9 is connected is sufficient if the hot water is on the high temperature layer side of the hot water storage tank 8, and the lower part of the hot water storage tank 8 is on the low temperature layer side of the hot water storage tank 8. If it is.

貯湯タンク８から放熱器３に湯水を送り貯湯タンク８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沸上げポンプ７を設けている。また、ヒートポンプ１において加熱する前の低温水の温度を検知する入水温度センサー１５を、沸上げ管９の放熱器３の入口側近傍に、加熱した高温水の温度を検知する出湯温度センサー１６を沸上げ管９における放熱器３の出口近傍に、それぞれ設けている。そして、貯湯タンク８の温度分布と蓄熱量を把握するため、貯湯タンク８の外側壁面に垂直方向に、複数の貯湯温度センサー１７ａ〜１７ｄを備えている。   In order to send hot water from the hot water storage tank 8 to the radiator 3 and return it to the hot water storage tank 8, a boiling pump 7 capable of arbitrarily changing the output is provided in the middle of the boiling pipe 9. Further, an incoming water temperature sensor 15 for detecting the temperature of the low-temperature water before heating in the heat pump 1 is provided near the inlet side of the radiator 3 of the boiling pipe 9 and a hot water temperature sensor 16 for detecting the temperature of the heated high-temperature water. They are provided in the vicinity of the outlet of the radiator 3 in the boiling pipe 9. And in order to grasp | ascertain the temperature distribution and heat storage amount of the hot water storage tank 8, the several hot water storage temperature sensor 17a-17d is provided in the perpendicular | vertical direction to the outer side wall surface of the hot water storage tank 8. FIG.

給湯に関する構成としては、貯湯タンク８の底部に給水源（図示せず）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 relating to hot water supply, a water supply pipe 19 for supplying water from a water supply source (not shown) is connected to the bottom of the hot water storage tank 8, and the water supply pipe 19 is decompressed to an appropriate pressure by a pressure reducing valve 20. To be supplied with water.

貯湯タンク８の上部には、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からの低温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。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、その先に蛇口などの給湯端末２４が接続されている。   A hot water supply pipe 21 is connected to the upper part of the hot water storage tank 8 to discharge the hot water stored in the hot water and use 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 temperature water from the water supply bypass pipe 22 in arbitrary ratios is provided. 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 such as a faucet is connected to the tip 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からの高温水と給水バイパス管２２からの低温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に注湯を行うようになっている。   As a configuration relating to pouring water into the bath, a hot water pouring pipe 28 that branches from the middle of the hot water feeding pipe 21 and is poured into the bathtub 13 is provided. A bath mixing valve 26 is provided so that low temperature 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 includes a pouring electromagnetic valve 27, which is arbitrarily opened and closed to automatically pour water into the bathtub 13.

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、利用側回路３１においては、利用側回路３１の途中に、バイパス管３７を介して、後述の風呂熱回収熱交換器３８をバイパスする流路切換手段３６を設置して、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に循環させる。また、浴槽１３内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、貯湯タンク８の湯水を熱源側ポンプ１１により風呂熱交換器１４に循環して貯湯タンク８に環流する。また、風呂熱交換器１４より、利用側ポンプ１２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が取り付けられている。   Regarding the circuit configuration of the bath heating operation that heats and keeps the hot water in the bathtub 13, in the use side circuit 31, a bath heat recovery heat exchanger 38, which will be described later, is provided via the bypass pipe 37 in the middle of the use side circuit 31. Bypass channel switching means 36 is installed, and 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, hot water in the hot water storage tank 8 is circulated to the bath heat exchanger 14 by the heat source side pump 11 and circulated to the hot water storage tank 8. Further, a circulating temperature sensor 33 for detecting the temperature of the hot water circulated and circulated by the use side pump 12 from the bath heat exchanger 14 is attached.

さらに、浴槽１３の湯から熱を回収する風呂熱回収運転の回路構成に関しては、利用側回路３１の途中に、風呂熱回収熱交換器３８を設置して、流路切換手段３６で、風呂接続管４２ａ、４２ｂを介して、浴槽１３内の湯が風呂熱回収熱交換器３８を循環するように切り換える。風呂熱回収熱交換器３８では、浴槽１３内の湯とヒートポンプ１の冷媒が熱交換を行うため、減圧手段４の出口から圧縮機２の入口までの低圧回路側に冷媒の流路を設置している。   Further, regarding the circuit configuration of the bath heat recovery operation for recovering heat from the hot water in the bathtub 13, a bath heat recovery heat exchanger 38 is installed in the middle of the use side circuit 31, and the flow path switching means 36 connects the bath. It switches so that the hot water in the bathtub 13 may circulate through the bath heat recovery heat exchanger 38 via the pipes 42a and 42b. In the bath heat recovery heat exchanger 38, since the hot water in the bathtub 13 and the refrigerant of the heat pump 1 exchange heat, a refrigerant flow path is installed on the low pressure circuit side from the outlet of the decompression means 4 to the inlet of the compressor 2. ing.

これら風呂への注湯に関する構成と、風呂加熱運転する構成及び、風呂熱回収運転に関する構成により浴槽回路３４が構成されている。さらに、貯湯回路１８と、浴槽回路３４とでタンクユニット４１を構成している。   The bathtub circuit 34 is comprised by the structure regarding the pouring to these baths, the structure which performs bath heating operation, and the structure regarding bath heat recovery operation. Further, the hot water storage circuit 18 and the bathtub circuit 34 constitute a tank unit 41.

以上のように構成された従来の給湯機の動作、作用は、以下の通りである。   The operation and action of the conventional water heater configured as described above are as follows.

貯湯タンク８に湯を貯める貯湯運転では、ヒートポンプ１は、圧縮機２によって圧縮された冷媒は、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において減圧されて低温低圧の湿り蒸気となり、吸熱器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、送風機６が吸熱器５の熱交換効率を高めるために強制的に大気を吸熱器５に循環させる。   In the hot water storage operation in which hot water is stored in the hot water storage tank 8, the heat pump 1 enters the radiator 3 where the refrigerant compressed by the compressor 2 is radiated and cooled. Thereafter, the pressure is reduced in the pressure reducing means 4 to become low-temperature and low-pressure wet steam, and heat is exchanged with air in the heat absorber 5 to be evaporated and returned to the compressor 2. At this time, the blower 6 forcibly circulates air to the heat absorber 5 in order to increase the heat exchange efficiency of the heat absorber 5.

この時、貯湯タンク８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。即ち、貯湯タンク８の下部にある低温層の湯水をヒートポンプ１により加熱し、貯湯タンク８に戻す貯湯運転においては、沸上げポンプ７を駆動し、貯湯タンク８からの低温水を加熱し、加熱された湯は沸き上げ管９を通って貯湯タンク８の上部に送られる。   At this time, the low temperature hot water in the lower part of the hot water storage tank 8 is sent to the radiator 3 by the boiling pump 7 and heated by absorbing the heat of the radiator 3. That is, in the hot water storage operation in which the hot water in the low temperature layer at the lower part of the hot water storage tank 8 is heated by the heat pump 1 and returned to the hot water storage tank 8, the boiling pump 7 is driven to heat and heat the low temperature water from the hot water storage tank 8. The heated water is sent to the upper part of the hot water storage tank 8 through the boiling pipe 9.

そして、出湯温度センサー１６により、ヒートポンプ６で加熱された水の温度を検知し、沸上げポンプ７の出力を変えることで、ヒートポンプ６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。   Then, the temperature of water heated by the heat pump 6 is detected by the tapping temperature sensor 16, and the output of the boiling pump 7 is changed to control the tapping temperature from the heat pump 6 so as to reach the target temperature. I do.

この様にして、貯湯タンク８に高温の湯を貯めてゆき、貯湯温度センサー１７ａ、１７ｂ、１７ｃ、１７ｄ及び入水温度センサー１５で検知した温度によって、貯湯タンク８内の蓄熱量を検知して、所定の蓄熱量となった時、ヒートポンプ１を停止する。   In this way, hot water is stored in the hot water storage tank 8, and the amount of heat stored in the hot water storage tank 8 is detected based on the temperatures detected by the hot water storage temperature sensors 17a, 17b, 17c, 17d and the incoming water temperature sensor 15. When the predetermined heat storage amount is reached, the heat pump 1 is stopped.

給湯端末２４への給湯運転では、給湯端末２４が給湯のために開けられると、貯湯タンク８内の湯水が給湯管２１から出湯されるとともに、給水管１９から貯湯タンク８に給水される。給湯温度に関して、給水バイパス管２２により給水を分岐し、貯湯タンク８からの高温水と給水からの低温水を、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。   In the hot water supply operation to the hot water supply terminal 24, when the hot water supply terminal 24 is opened for hot water supply, hot water in the hot water storage tank 8 is discharged from the hot water supply pipe 21 and supplied from the water supply pipe 19 to the hot water storage tank 8. With respect to the hot water supply temperature, the water supply is branched by the water supply bypass pipe 22, and hot water from the hot water storage tank 8 and low temperature water from the water supply are mixed at the mixing valve 23 at different mixing ratios to change the hot water supply temperature. Hot water is supplied to the terminal 24.

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、リモコン（図示せず）により利用者が選択した給湯温度となるように保たれる。貯湯タンク８内の高温水と水を混ぜて温度を低下させることによって給湯を行うので、これによって貯湯タンク８内の高温水温度を給湯温度である４０℃から５０℃程度よりも大幅に高く、６５℃から９０℃程度として、貯湯タンク８の蓄熱密度を大きくすることが可能になる。   The mixing ratio at this time is controlled according to the hot water temperature detected by the hot water temperature sensor 25 and is kept at the hot water temperature selected by the user by a remote controller (not shown). Since hot water is supplied by mixing the hot water and water in the hot water storage tank 8 and lowering the temperature, the hot water temperature in the hot water storage tank 8 is significantly higher than the hot water temperature of 40 ° C. to about 50 ° C., The heat storage density of the hot water storage tank 8 can be increased by setting the temperature to about 65 ° C. to 90 ° C.

風呂への注湯運転では、注湯運転を開始すると、注湯電磁弁２７が開成され、給水バイパス管２２により給水を分岐し、貯湯タンク８からの高温水と給水からの低温水を風呂用混合弁２６において混合比を変えて混合することで、注湯温度を変化させて浴槽１３に注湯する。   In the pouring operation to the bath, when the pouring operation is started, the pouring solenoid valve 27 is opened, the water supply is branched by the water supply bypass pipe 22, and hot water from the hot water storage tank 8 and low temperature water from the water supply are used for the bath. The mixing valve 26 changes the mixing ratio and mixes, so that the pouring temperature is changed and the bath 13 is poured.

この時の混合比は、注湯温度センサー３５で検知される注湯温度に応じて制御され、リモコンにより利用者が選択した注湯温度となるように保たれる。即ち、貯湯タンク８内の高温水と水を混ぜて温度を低下させることによって浴槽１３に注湯を行うことになる。   The mixing ratio at this time is controlled in accordance with the pouring temperature detected by the pouring temperature sensor 35 and is kept at the pouring temperature selected by the user by the remote controller. That is, hot water is poured into the bathtub 13 by mixing the hot water and water in the hot water storage tank 8 to lower the temperature.

浴槽１３内の湯を加熱する風呂加熱運転では、貯湯タンク８内の湯水の熱を浴槽１３内の湯水に放熱することで行っている。   In the bath heating operation for heating the hot water in the bathtub 13, the heat of the hot water in the hot water storage tank 8 is radiated to the hot water in the bathtub 13.

利用側回路３１においては、流路切換手段３６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に循環させる。一方、熱源側回路３０では、貯湯タンク８の湯水を熱源側ポンプ１１により、風呂熱交換器１４に循環して貯湯タンク８に環流している。   In the use side circuit 31, the flow path switching means 36 circulates hot water in the bathtub 13 to the bath heat exchanger 14 by the use side pump 12. On the other hand, in the heat source side circuit 30, the hot water in the hot water storage tank 8 is circulated to the bath heat exchanger 14 by the heat source side pump 11 and circulated to the hot water storage tank 8.

そして、風呂熱交換器１４では、高温の熱源側回路３０の湯と温度の低い利用側回路３１の湯が熱交換を行って、利用側回路３１の湯を加熱する。この一連の動作は、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持続される。   In the bath heat exchanger 14, the hot water in the high-temperature heat source side circuit 30 and the hot water in the low-temperature use side circuit 31 exchange heat to heat the hot water in the usage-side circuit 31. This series of operations is continued until the bath temperature sensor 32 determines that the predetermined bath temperature has been reached.

風呂熱回収運転では、ヒートポンプ１を運転して貯湯運転を行うと、風呂熱回収熱交換器３８には、低圧で低温になった冷媒が流れることになる。   In the bath heat recovery operation, when the heat pump 1 is operated and the hot water storage operation is performed, the low temperature and low temperature refrigerant flows through the bath heat recovery heat exchanger 38.

一方、流路切換手段３６は、浴槽１３内の湯水を、利用側ポンプ１２により風呂熱回収熱交換器３８に送り、再び浴槽１３に循環させる。   On the other hand, the flow path switching means 36 sends hot water in the bathtub 13 to the bath heat recovery heat exchanger 38 by the use side pump 12 and circulates it again in the bathtub 13.

この時、低圧で低温となった冷媒と、浴槽１３からの湯が熱交換することにより、浴槽１３内の熱がヒートポンプ１内を流れる低温低圧の冷媒に吸熱される。ヒートポンプ１では吸熱量が増加するため、低圧圧力が上昇する。また、風呂熱回収運転中は、大気から吸
熱する必要がないため、送風機６を停止しながら貯湯運転を行うこともできる。 At this time, the heat of the bathtub 13 is absorbed by the low-temperature and low-pressure refrigerant flowing in the heat pump 1 by exchanging heat between the low-pressure and low-temperature refrigerant and the hot water from the bathtub 13. In the heat pump 1, the amount of heat absorption increases, so the low pressure increases. Moreover, since it is not necessary to absorb heat from the atmosphere during the bath heat recovery operation, the hot water storage operation can be performed while the blower 6 is stopped.

よって、浴槽１３の湯から熱を回収する風呂熱回収運転を行うことにより、吸熱量が増加するため、低圧圧力を上昇させることができるので、ヒートポンプ１の運転効率を向上させることができる。   Therefore, since the amount of heat absorption increases by performing the bath heat recovery operation for recovering heat from the hot water in the bathtub 13, the low pressure can be increased, so that the operation efficiency of the heat pump 1 can be improved.

また、送風機６を停止することができるので、送風機６の入力を低減でき、ヒートポンプ１の運転効率を向上できる。
特開２００７−２４４９４号公報 Moreover, since the air blower 6 can be stopped, the input of the air blower 6 can be reduced and the operating efficiency of the heat pump 1 can be improved.
JP 2007-24494 A

しかしながら、上記従来のヒートポンプ給湯機の構成では、ヒートポンプ１とタンクユニット４１はそれぞれ別個に設置されるため、ヒートポンプ１とタンクユニット４１が離れた位置に設置されると、現地で風呂接続管４２ａ、４２ｂ、及び貯湯接続管４３ａ、４３ｂの接続工事に工数がかかると共に、接続配管での熱ロスが発生することになり、熱効率が低下するという課題があった。   However, in the configuration of the conventional heat pump water heater, the heat pump 1 and the tank unit 41 are separately installed. Therefore, when the heat pump 1 and the tank unit 41 are installed at positions separated from each other, the bath connection pipe 42a, 42b and the hot water storage connection pipes 43a and 43b require a lot of man-hours for connecting work, and heat loss occurs in the connection pipe, resulting in a problem that thermal efficiency is lowered.

本発明は、現地での接続管を接続する工数を低減すると共に、接続管を極力短くして、接続管からの熱ロスを低減し、熱効率の高いヒートポンプ給湯機を提供する事を目的とするものである。   It is an object of the present invention to provide a heat pump water heater having high thermal efficiency by reducing the number of steps for connecting a connecting pipe on site and shortening the connecting pipe as much as possible to reduce heat loss from the connecting pipe. Is.

上記従来の課題を解決するために、本発明のヒートポンプ給湯機は、圧縮機、放熱器、減圧手段、吸熱器を環状に接続して構成されるヒートポンプと、沸き上げポンプにより貯湯タンクの底部より水を前記放熱器に循環させて高温の湯水を前記貯湯タンクに溜める貯湯回路と、前記減圧手段の出口から前記圧縮機の間の冷媒と浴槽の湯水が熱交換する風呂熱回収熱交換器を有する浴槽回路により構成され、前記ヒートポンプと、前記貯湯回路と、前記浴槽回路の全てを一体型ユニット内に納めたもので、現地で接続管を接続する工数を低減すると共に、接続管からの熱ロスを低減できるので、熱効率を向上させることができる。   In order to solve the above-described conventional problems, the heat pump water heater of the present invention includes a heat pump configured by connecting a compressor, a radiator, a decompression unit, and a heat absorber in an annular shape, and a boiling pump from the bottom of the hot water storage tank. A hot water storage circuit that circulates water to the radiator to store hot hot water in the hot water storage tank, and a bath heat recovery heat exchanger that exchanges heat between the refrigerant between the compressor and the hot water in the bathtub from the outlet of the decompression means. It is composed of a bathtub circuit, and the heat pump, the hot water storage circuit, and the bathtub circuit are all housed in an integrated unit, reducing the man-hour for connecting the connection pipe in the field, and the heat from the connection pipe Since loss can be reduced, thermal efficiency can be improved.

本発明のヒートポンプ給湯機は、ヒートポンプと、貯湯回路と浴槽回路を全て一体型ユニット内に納めることにより、現地で接続管を接続する工数を低減すると共に、接続管からの熱ロスを低減できるので、熱効率の高いヒートポンプ給湯機を提供できる。   The heat pump water heater of the present invention can reduce the man-hour for connecting the connecting pipe at the site and reduce the heat loss from the connecting pipe by storing the heat pump, the hot water storage circuit and the bathtub circuit all in the integrated unit. A heat pump water heater with high thermal efficiency can be provided.

第１の発明は、圧縮機、放熱器、減圧手段、吸熱器を環状に接続して構成されるヒートポンプと、沸き上げポンプにより貯湯タンクの底部より水を前記放熱器に循環させて高温の湯水を前記貯湯タンクに溜める貯湯回路と、前記減圧手段の出口から前記圧縮機の間の冷媒と浴槽の湯水が熱交換する風呂熱回収熱交換器を有する浴槽回路により構成され、前記ヒートポンプと、前記貯湯回路と、前記浴槽回路の全てを一体型ユニット内に納めたもので、現地で接続管を接続する工数を低減すると共に、接続管からの熱ロスを低減できるので、熱効率を向上させることができる。   The first invention is a high temperature hot water by circulating water from the bottom of a hot water storage tank to the heat radiator by a heat pump constituted by connecting a compressor, a radiator, a pressure reducing means and a heat absorber in an annular shape, and a boiling pump. A hot water storage circuit for storing heat in the hot water storage tank, and a bathtub circuit having a bath heat recovery heat exchanger for exchanging heat between the refrigerant between the compressor and the hot water of the bathtub from the outlet of the decompression means, the heat pump, The hot water storage circuit and the bathtub circuit are all housed in an integrated unit, reducing the man-hours for connecting the connecting pipe on site and reducing the heat loss from the connecting pipe, thus improving the thermal efficiency. it can.

第２の発明は、特に、第１の発明の浴槽回路に、風呂熱回収熱交換器をバイパスする流路切換手段を設けたもので、浴槽内の湯水の再加熱と浴槽内湯水からの熱回収を１つの水回路で切り換えることが可能となるので、一体型ユニットへの収納性を向上させることができる。   In the second invention, in particular, the bathtub circuit of the first invention is provided with flow path switching means for bypassing the bath heat recovery heat exchanger, and the reheating of the hot water in the bathtub and the heat from the hot water in the bathtub are provided. Since it is possible to switch the recovery with one water circuit, it is possible to improve the storage property in the integrated unit.

第３の発明は、特に、第１又は第２の発明のヒートポンプに臨界圧力以上に昇圧される冷媒を用いたもので、放熱器を流れる冷媒は、圧縮機で臨界圧力以上に加圧されているので、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水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 the third invention, in particular, the heat pump of the first or second invention uses a refrigerant whose pressure is increased to a critical pressure or higher, and the refrigerant flowing through the radiator is pressurized to a critical pressure or higher by a compressor. Therefore, it will not condense even if the heat is taken away by the radiator and the temperature drops. Therefore, it becomes easy to form a temperature difference between the refrigerant and water in the entire radiator, and the heat exchange efficiency can be increased.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

（実施の形態１）
図１は、本発明の第１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。尚、従来のヒートポンプ給湯機と同一部分については、同一符号を付して、その説明を省略する。 (Embodiment 1)
FIG. 1 is a circuit diagram of a heat pump water heater in the first embodiment of the present invention. In addition, about the same part as the conventional heat pump water heater, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

本実施の形態におけるヒートポンプ給湯機は、ヒートポンプ１と、貯湯回路１８と、浴槽回路３４の全てを一体型ユニット３９に内蔵し、風呂接続管４２ａ、４２ｂ、及び貯湯接続管４３ａ、４３ｂも一体型ユニット３９内に内蔵し、これらを工場にて組立てるようにしたもので、個々の構成部品は、従来のヒートポンプ給湯機と同一なので説明は省略する。又、給湯運転、注湯運転、風呂熱回収運転時の動作も、従来のヒートポンプ給湯機と同一なので説明は省略する。   The heat pump water heater in the present embodiment incorporates all of the heat pump 1, the hot water storage circuit 18, and the bathtub circuit 34 in the integrated unit 39, and the bath connection pipes 42a and 42b and the hot water storage connection pipes 43a and 43b are also integrated. These units are built in the unit 39 and assembled at the factory. The individual components are the same as those of the conventional heat pump water heater, and the description thereof will be omitted. Also, the operation during the hot water supply operation, the pouring operation, and the bath heat recovery operation is the same as that of the conventional heat pump water heater, and the description thereof will be omitted.

尚、本実施の形態におけるヒートポンプ１には、冷媒として炭酸ガスが用いており、圧縮機２によって圧縮された冷媒が、高温高圧の超臨界状態の冷媒として放熱器３に入るようにしている。   In the heat pump 1 according to the present embodiment, carbon dioxide is used as a refrigerant, and the refrigerant compressed by the compressor 2 enters the radiator 3 as a high-temperature and high-pressure refrigerant in a supercritical state.

以上のように、本実施の形態によれば、浴槽１３の湯を風呂熱交換器３８に循環させる際の循環路が一体型ユニット３９内に納められており、短いことから配管での熱ロスをより少なくできる。又、ヒートポンプユニット１と、貯湯回路１８と、浴槽回路３４の全てを一体型ユニット３９に内蔵することによって、接続管も一体型ユニット内に内蔵し、現地で接続管を接続する工数を低減すると共に、接続管を極力短くすることができ、接続管からの熱ロスを低減して、熱効率を大幅に向上させることが出来る。   As described above, according to the present embodiment, the circulation path for circulating the hot water of the bathtub 13 to the bath heat exchanger 38 is stored in the integrated unit 39, and the heat loss in the piping is short. Can be reduced. In addition, by incorporating all of the heat pump unit 1, the hot water storage circuit 18, and the bathtub circuit 34 in the integrated unit 39, the connecting pipe is also incorporated in the integrated unit, and the number of steps for connecting the connecting pipe in the field is reduced. At the same time, the connecting pipe can be shortened as much as possible, the heat loss from the connecting pipe can be reduced, and the thermal efficiency can be greatly improved.

以上のように、本発明にかかるヒートポンプ給湯機は、ヒートポンプと、貯湯回路と、浴槽回路を一体型ユニットに内蔵することによって、接続管も一体型ユニット内に内蔵し、現地で接続管を接続する工数を低減すると共に、接続管を極力短くすることで、接続管からの熱ロスを低減できより効率の高いヒートポンプ給湯機として有用である。   As described above, the heat pump water heater according to the present invention incorporates the heat pump, the hot water storage circuit, and the bathtub circuit in the integrated unit, so that the connecting pipe is also incorporated in the integrated unit, and the connecting pipe is connected locally. By reducing the number of man-hours to be performed and shortening the connecting pipe as much as possible, heat loss from the connecting pipe can be reduced, which is useful as a more efficient heat pump 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
２ 圧縮機
３ 放熱器
４ 減圧手段
５ 吸熱器
７ 沸上げポンプ
８ 貯湯タンク
１３ 浴槽
１８ 貯湯回路
３４ 浴槽回路
３６ 流路切換手段
３８ 風呂熱回収熱交換器
３９ 一体型ユニット DESCRIPTION OF SYMBOLS 1 Heat pump 2 Compressor 3 Radiator 4 Pressure reducing means 5 Heat absorber 7 Boiling pump 8 Hot water storage tank 13 Bath 18 Hot water storage circuit 34 Bath circuit 36 Flow path switching means 38 Bath heat recovery heat exchanger 39 Integrated unit

Claims (3)

圧縮機、放熱器、減圧手段、吸熱器を環状に接続して構成されるヒートポンプと、沸き上げポンプにより貯湯タンクの底部より水を前記放熱器に循環させて高温の湯水を前記貯湯タンクに溜める貯湯回路と、前記減圧手段の出口から前記圧縮機の間の冷媒と浴槽の湯水が熱交換する風呂熱回収熱交換器を有する浴槽回路により構成され、前記ヒートポンプと、前記貯湯回路と、前記浴槽回路の全てを一体型ユニット内に納めたことを特徴とするヒートポンプ給湯機。 A heat pump configured by annularly connecting a compressor, a radiator, a pressure reducing means, and a heat absorber, and a boiling pump circulates water from the bottom of the hot water storage tank to the heat radiator to collect hot hot water in the hot water storage tank. A hot water storage circuit, and a bathtub circuit having a bath heat recovery heat exchanger for exchanging heat between the refrigerant between the compressor and the hot water of the bathtub from the outlet of the decompression means, the heat pump, the hot water storage circuit, and the bathtub A heat pump water heater characterized by containing all of the circuitry in an integrated unit. 浴槽回路に、風呂熱回収熱交換器をバイパスする流路切換手段を設け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。 The heat pump water heater according to claim 1, wherein the bathtub circuit is provided with flow path switching means for bypassing the bath heat recovery heat exchanger. ヒートポンプに臨界圧力以上に昇圧される冷媒を用いたことを特徴とする請求項１又２に記載のヒートポンプ給湯機。 The heat pump water heater according to claim 1 or 2, wherein a refrigerant whose pressure is raised to a critical pressure or higher is used for the heat pump.
JP2008062183A 2008-03-12 2008-03-12 Heat pump water heater Pending JP2009216336A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102798246A (en) * 2012-07-25 2012-11-28 南京枫叶能源设备有限公司 Air conditioning unit with water supplied by water source, ground source and heat pump
CN105864862A (en) * 2016-05-24 2016-08-17 珠海格力电器股份有限公司 Bathroom heating device, heat exchange system and bathroom heating control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102798246A (en) * 2012-07-25 2012-11-28 南京枫叶能源设备有限公司 Air conditioning unit with water supplied by water source, ground source and heat pump
CN105864862A (en) * 2016-05-24 2016-08-17 珠海格力电器股份有限公司 Bathroom heating device, heat exchange system and bathroom heating control method

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