WO2023275946A1 - Heat pump water heater - Google Patents

Heat pump water heater Download PDF

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Publication number
WO2023275946A1
WO2023275946A1 PCT/JP2021/024402 JP2021024402W WO2023275946A1 WO 2023275946 A1 WO2023275946 A1 WO 2023275946A1 JP 2021024402 W JP2021024402 W JP 2021024402W WO 2023275946 A1 WO2023275946 A1 WO 2023275946A1
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WO
WIPO (PCT)
Prior art keywords
heat pump
storage unit
water
heat
pump unit
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PCT/JP2021/024402
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French (fr)
Japanese (ja)
Inventor
直也 竹田
Original Assignee
三菱電機株式会社
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2021/024402 priority Critical patent/WO2023275946A1/en
Priority to EP21948258.5A priority patent/EP4365507A1/en
Priority to JP2023531161A priority patent/JPWO2023275946A1/ja
Publication of WO2023275946A1 publication Critical patent/WO2023275946A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters

Definitions

  • the present disclosure relates to a heat pump water heater.
  • Patent Document 1 describes a heat pump water heater.
  • a heat pump water heater described in Patent Document 1 includes a heat storage unit for improving energy efficiency.
  • the heat storage unit in Patent Document 1 absorbs heat from water supplied from the hot water storage tank to the heat pump unit, thereby lowering the incoming water temperature of the water supplied to the heat pump unit. This improves the heat exchange efficiency of the heat pump unit.
  • An object of the present disclosure is to obtain a heat pump water heater that is advantageous in improving energy efficiency.
  • a heat pump water heater includes a hot water storage tank having a heat pump unit that heats water, a high temperature section that stores water heated by the heat pump unit, and a low temperature section that stores water at a temperature lower than the water stored in the high temperature section.
  • a water inlet pipe that supplies water from the low temperature part to the heat pump unit;
  • a heat storage unit that stores heat by absorbing heat from the water flowing through the water inlet pipe;
  • a first branch valve for switching a flow path, and a first bypass pipe connecting between the heat storage unit and the heat pump unit and the first branch valve are provided.
  • the first branch valve has a flow path that connects the low temperature section and the heat pump unit via the heat storage unit, and a flow path that connects the low temperature section and the heat pump unit via the first bypass pipe without passing through the heat storage unit. , can be switched.
  • FIG. 1 is a configuration diagram of a heat pump water heater according to Embodiment 1.
  • FIG. 2 is a functional block diagram of the heat pump water heater of Embodiment 1.
  • FIG. 3 is a diagram showing an example of a configuration for realizing functions of a control unit according to Embodiment 1;
  • FIG. 4 is a flow chart showing an example of a boiling operation by the heat pump water heater of Embodiment 1.
  • FIG. FIG. 2 is a flow diagram showing an example of a hot water supply operation by the heat pump water heater of Embodiment 1;
  • FIG. 1 is a configuration diagram of a heat pump water heater according to Embodiment 1.
  • FIG. FIG. 2 is a functional block diagram of the heat pump water heater of Embodiment 1.
  • FIG. FIG. 2 shows an excerpt of the main functions of the heat pump water heater according to the present embodiment.
  • the heat pump water heater is composed of a heat pump unit 101 and a hot water storage unit 102 .
  • the heat pump unit 101 functions as heating means for heating water. Water is supplied to the heat pump unit 101 from the hot water storage unit 102 .
  • the heat pump unit 101 heats water supplied from the hot water storage unit 102 .
  • the heat pump unit 101 includes a blower fan 103 , an air heat exchanger 104 , a compressor 105 , a water heat exchanger 106 and a decompression device 107 .
  • the blower fan 103 is a device that blows air to cool the air heat exchanger 104 .
  • the air heat exchanger 104 exchanges heat between the atmosphere and the refrigerant. Within the air heat exchanger 104, the refrigerant absorbs heat from the atmosphere. The refrigerant that has absorbed heat in air heat exchanger 104 is sent to compressor 105 .
  • the refrigerant sent to the compressor 105 is compressed and changed to a high temperature and high pressure state.
  • the refrigerant compressed by compressor 105 is sent to water heat exchanger 106 .
  • the water heat exchanger 106 exchanges heat between the water supplied from the hot water storage unit 102 and the high-temperature refrigerant. Water supplied from hot water storage unit 102 to heat pump unit 101 is heated in water heat exchanger 106 .
  • the refrigerant heat-exchanged in the water heat exchanger 106 is sent to the decompression device 107 .
  • the decompression device 107 expands the refrigerant, that is, decompresses it.
  • the refrigerant decompressed by decompression device 107 is sent to air heat exchanger 104 .
  • the refrigerant circulates as described above.
  • the hot water storage unit 102 includes a hot water storage tank 108 that stores water and a heat storage unit 109 that stores heat.
  • the hot water storage tank 108 has a high temperature section that stores water heated by the heat pump unit 101 and a low temperature section that stores water at a lower temperature than the water stored in the high temperature section.
  • the heat storage unit 109 absorbs and stores heat from water flowing through the water inlet pipe 117 that supplies water from the low temperature portion of the hot water storage tank 108 to the heat pump unit 101 . Due to the heat absorption by the heat storage unit 109, the incoming water temperature of the water supplied to the heat pump unit 101 can be lowered. Thereby, the heat exchange efficiency of the heat pump unit 101 can be improved.
  • the heat storage unit 109 may be provided outside the heat pump unit 101 .
  • the water inlet pipe 117 connects the low temperature part of the hot water storage tank 108 and the heat pump unit 101 .
  • water inlet pipe 117 passes through heat storage unit 109 .
  • a boiling pump 122 is provided in the water inlet pipe 117 .
  • Boiling pump 122 is a pump for circulating water between hot water storage tank 108 and heat pump unit 101 .
  • the heat pump water heater includes first branch valve 110 provided in water inlet pipe 117 .
  • the first branch valve 110 is a device for switching the flow path on the water inlet pipe 117 .
  • First branch valve 110 is provided between the low temperature portion of hot water storage tank 108 and heat storage unit 109 .
  • a first bypass pipe 115 is connected to the first branch valve 110 .
  • First bypass pipe 115 connects between heat storage unit 109 and heat pump unit 101 and first branch valve 110 .
  • the first bypass pipe 115 is a pipe branched from the water inlet pipe 117 between the heat storage unit 109 and the heat pump unit 101 and connected to the first branch valve 110 .
  • the first branch valve 110 connects the low temperature portion of the hot water storage tank 108 and the heat pump unit 101 via the heat storage unit 109 , and the low temperature portion of the hot water storage tank 108 and the heat pump unit 101 without the heat storage unit 109 .
  • the channel connected via the first bypass pipe 115 can be switched.
  • first branch valve 110 by controlling first branch valve 110 , water can be supplied from hot water storage tank 108 to heat pump unit 101 without going through heat storage unit 109 . As a result, it is possible to prevent the temperature of the water supplied to the heat pump unit 101 from rising due to the heat storage unit 109 . According to the present embodiment, it is possible to obtain a heat pump water heater that is advantageous in improving energy efficiency.
  • the heat pump hot water supply apparatus also includes hot water outlet pipe 118 for supplying water from heat pump unit 101 to the high temperature portion of hot water storage tank 108 .
  • the hot water pipe 118 connects the high temperature portion of the hot water storage tank 108 and the heat pump unit 101 .
  • This outlet pipe 118 may pass through the heat storage unit 109 as shown in FIG.
  • the heat storage unit 109 may absorb and store heat from the water flowing through the hot water supply pipe 118 .
  • the heat pump water heater includes second branch valve 111 provided in hot water outlet pipe 118 .
  • the second branch valve 111 is a device for switching the flow path on the hot water outlet pipe 118 .
  • Second branch valve 111 is provided between heat pump unit 101 and heat storage unit 109 .
  • a second bypass pipe 116 is connected to the second branch valve 111 .
  • the second bypass pipe 116 connects between the heat storage unit 109 and the heat pump unit 101 and the second branch valve 111 .
  • the second bypass pipe 116 is a pipe branched from the hot water outlet pipe 118 between the heat storage unit 109 and the hot part of the hot water storage tank 108 and connected to the second branch valve 111 .
  • the second branch valve 111 connects the high temperature portion of the hot water storage tank 108 and the heat pump unit 101 via the heat storage unit 109, and the high temperature portion of the hot water storage tank 108 and the heat pump unit 101 without the heat storage unit 109. and the flow path connected via the second bypass pipe 116 can be switched.
  • the heat pump water heater may include third branch valve 112 provided in hot water outlet pipe 118 between the high temperature portion of hot water storage tank 108 and heat storage unit 109 .
  • the third branch valve 112 is connected to a mixing valve 113 that is connected to the high temperature portion of the hot water storage tank 108 .
  • the mixing valve 113 has a function of mixing the outflow water from the high-temperature part of the hot water storage tank 108 and the low-temperature water from a water source such as city water to adjust the outlet temperature of the water supplied to the user.
  • a water source such as city water is connected to the mixing valve 113 .
  • a water source such as city water is also connected to the low temperature part of the hot water storage tank 108 .
  • the hot water storage unit 102 includes a pressure reducing valve 114 for adjusting low-temperature water supplied from a water source such as city water to a predetermined pressure.
  • the heat pump water heater includes a heat pump unit outflow water temperature detection unit 119, a heat storage unit internal temperature detection unit 120, and a hot water storage tank low temperature part outflow water temperature detection unit 121.
  • a heat pump unit outflow water temperature detector 119 detects the temperature of water flowing out of the heat pump unit 101 .
  • the heat storage unit internal temperature detection unit 120 detects the temperature inside the heat storage unit 109 .
  • Hot water storage tank low temperature part outflow water temperature detection unit 121 detects the temperature of water flowing out from the low temperature part of hot water storage tank 108 . A plurality of these detection units may be provided.
  • the heat pump water heater according to the present embodiment is controlled according to the detection result of each detection unit described above.
  • the heat pump water heater according to the present embodiment may include a control unit 130 for controlling the heat pump water heater.
  • the control unit 130 controls the first branch valve 110, the second It controls the two branch valve 111, the third branch valve 112, and the like.
  • FIG. 3 is a diagram showing an example of a configuration that implements the functions of the control unit 130 according to the first embodiment.
  • the functions of the control unit 130 are implemented by, for example, a processing circuit.
  • the processing circuitry may be dedicated hardware 140 .
  • the processing circuitry may comprise processor 141 and memory 142 .
  • a portion of the processing circuitry may be formed as dedicated hardware 140 and may further comprise a processor 141 and memory 142 .
  • part of the processing circuitry is formed as dedicated hardware 140 .
  • the processing circuitry further comprises a processor 141 and a memory 142 .
  • a processing circuit part of which is at least one piece of dedicated hardware 140, can be, for example, a single circuit, multiple circuits, programmed processors, parallel programmed processors, ASICs, FPGAs, or combinations thereof. .
  • each function of the control unit 130 is implemented by software, firmware, or a combination of software and firmware.
  • the software and firmware are written as programs and stored in the memory 142.
  • the processor 141 reads out and executes programs stored in the memory 142 to achieve the functions of each unit.
  • the processor 141 is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP.
  • the memory 142 corresponds to, for example, non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM and EEPROM, magnetic disk, flexible disk, optical disk, compact disk, mini-disk and DVD.
  • the processing circuit can realize each function of the control unit 130 by hardware, software, firmware, or a combination thereof.
  • FIG. 4 is a flow chart showing an example of a boiling operation by the heat pump water heater of Embodiment 1.
  • FIG. 4 When the amount of hot water remaining in the hot water storage tank 108 becomes small, the heat pump unit 101 is operated as necessary to perform a boiling operation, and hot water is stored in the hot water storage tank 108 .
  • step S100 it is determined whether the temperature of the water flowing out from the low temperature part of the hot water storage tank 108 is higher or lower than the temperature inside the heat storage unit 109 (step S101). This determination is made by the control unit 130 based on the detection result of each detection unit described above.
  • Step S102 When the temperature of the water flowing out from the low temperature part of the hot water storage tank 108 is higher than the temperature in the heat storage unit 109, the hot water storage tank 108 and the heat storage unit 109 are connected by the first branch valve 110, and heat is stored by the heat storage unit 109.
  • Step S102 When the temperature of the water flowing out of the low-temperature portion of hot water storage tank 108 is lower than the temperature in heat storage unit 109, hot water storage tank 108 and heat pump unit 101 are connected by first branch valve 110 without interposing heat storage unit 109, and the heat storage unit 109 is connected. No heat is stored by the unit 109 (step S103).
  • the heat storage unit 109 stores heat. As a result, the temperature of water entering the heat pump unit 101 can be lowered. Further, when the temperature in the heat storage unit 109 is higher than the temperature of the water flowing out from the low temperature portion of the hot water storage tank 108, the heat storage unit 109 does not store heat. As a result, an increase in the temperature of water entering the heat pump unit 101 due to the heat storage unit 109 can be avoided.
  • FIG. 5 is a flowchart showing an example of the hot water supply operation by the heat pump water heater of Embodiment 1.
  • the hot water supply operation is an operation in which the heat pump unit water heater supplies hot water to the outside.
  • the hot water supply operation includes, for example, various operations such as filling hot water into a bathtub and supplying hot water to an arbitrary hot water supply terminal.
  • step S200 it is determined whether the temperature of the water flowing out of the heat pump unit 101 is higher or lower than the temperature in the heat storage unit 109 (step S201). This determination is made by the control unit 130 based on the detection result of each detection unit described above.
  • Step S202 When the temperature of the water flowing out of the heat pump unit 101 is lower than the temperature in the heat storage unit 109, the second branch valve 111 connects the hot water tank 108 and the heat storage unit 109 to increase the temperature of the water flowing out of the heat pump unit 101.
  • Step S202 On the other hand, when the temperature of water flowing out of heat pump unit 101 is higher than the temperature in heat storage unit 109 , second branch valve 111 allows heat pump unit 101 and the high temperature portion of hot water storage tank 108 to flow through heat storage unit 109 without passing through heat storage unit 109 . 2 bypass pipe 116 (step S203).
  • the outflow water from the heat pump unit 101 is mixed with the outflow water from the high-temperature portion of the hot water storage tank 108, city water, or the like in the mixing valve 113 and then discharged.
  • energy loss can be suppressed by heat exchange between the heat storage unit 109 and the outflow water from the heat pump unit 101 .
  • the above-mentioned The boiling operation may be started automatically.
  • the flow path is controlled by the first branch valve 110 according to the determination result as to whether the temperature of the water flowing out from the low temperature portion of the hot water storage tank 108 is higher or lower than the temperature in the heat storage unit 109. is executed.
  • the heat pump water heater according to the present disclosure can be used, for example, to fill hot water into a bathtub or to supply hot water to any hot water supply terminal.

Abstract

This heat pump water heater comprises: a heat pump unit (101) for heating water; a hot-water reservoir tank (108) having a high-temperature section for storing water heated by the heat pump unit (101) and a low-temperature section for storing water at a lower temperature than the water stored in the high-temperature section; inlet piping (117) for supplying water from the low-temperature section to the heat pump unit (101); a thermal storage unit (109) for absorbing heat from water flowing through the inlet piping (117) and storing the heat; a first branch valve (110) for switching between flow paths in the inlet piping (117), the first branch valve (110) being provided between the low-temperature section and the thermal storage unit (109); and first bypass piping (115) for connecting the first branch valve (110) between the thermal storage unit (109) and the heat pump unit (101). The first branch valve (110) is capable of switching between a flow path in which the low-temperature section and the heat pump unit (101) are linked by way of the thermal storage unit (109), and a flow path in which the low-temperature section and the heat pump unit (101) are linked without interposition of the thermal storage unit (109).

Description

ヒートポンプ給湯装置heat pump water heater
　本開示は、ヒートポンプ給湯装置に関するものである。 The present disclosure relates to a heat pump water heater.
　特許文献１に、ヒートポンプ給湯装置が記載されている。特許文献１に記載されたヒートポンプ給湯装置は、エネルギー効率を向上させるための蓄熱ユニットを備える。特許文献１における蓄熱ユニットは、貯湯槽からヒートポンプユニットへ供給される水から吸熱することで、ヒートポンプユニットへ供給される水の入水温度を低下させる。これにより、ヒートポンプユニットの熱交換効率の向上が図られる。 Patent Document 1 describes a heat pump water heater. A heat pump water heater described in Patent Document 1 includes a heat storage unit for improving energy efficiency. The heat storage unit in Patent Document 1 absorbs heat from water supplied from the hot water storage tank to the heat pump unit, thereby lowering the incoming water temperature of the water supplied to the heat pump unit. This improves the heat exchange efficiency of the heat pump unit.
日本特開２０１３－２１３５９６号公報Japanese Patent Application Laid-Open No. 2013-213596
　特許文献１に記載の構成においては、貯湯槽から蓄熱ユニットへ流入する水の温度が当該蓄熱ユニットよりも高い場合、ヒートポンプユニットへ供給される水の入水温度が上昇してしまい、ヒートポンプユニットの熱交換効率が低下してしまう。 In the configuration described in Patent Document 1, when the temperature of the water flowing from the hot water storage tank into the heat storage unit is higher than that of the heat storage unit, the temperature of the water supplied to the heat pump unit rises, causing the heat pump unit to heat. Exchange efficiency is reduced.
　本開示は、上記のような課題を解決するためのものである。本開示の目的は、エネルギー効率の向上に有利なヒートポンプ給湯装置を得ることである。 The present disclosure is intended to solve the above problems. An object of the present disclosure is to obtain a heat pump water heater that is advantageous in improving energy efficiency.
　本開示に係るヒートポンプ給湯装置は、水を加熱するヒートポンプユニットと、ヒートポンプユニットによって加熱された水を蓄える高温部と当該高温部に蓄えられる水よりも低温の水を蓄える低温部とを有する貯湯タンクと、低温部からヒートポンプユニットへ水を供給する入水配管と、入水配管を流れる水から熱を吸収して熱を蓄える蓄熱ユニットと、低温部と蓄熱ユニットとの間に設けられ、入水配管上の流路を切り替える第１分岐弁と、蓄熱ユニットおよびヒートポンプユニットの間と第１分岐弁とを接続する第１バイパス配管と、を備える。第１分岐弁は、低温部とヒートポンプユニットとが蓄熱ユニットを経由して繋がる流路と、低温部とヒートポンプユニットとが蓄熱ユニットを経由せずに第１バイパス配管を経由して繋がる流路と、を切り替え可能である。 A heat pump water heater according to the present disclosure includes a hot water storage tank having a heat pump unit that heats water, a high temperature section that stores water heated by the heat pump unit, and a low temperature section that stores water at a temperature lower than the water stored in the high temperature section. a water inlet pipe that supplies water from the low temperature part to the heat pump unit; a heat storage unit that stores heat by absorbing heat from the water flowing through the water inlet pipe; A first branch valve for switching a flow path, and a first bypass pipe connecting between the heat storage unit and the heat pump unit and the first branch valve are provided. The first branch valve has a flow path that connects the low temperature section and the heat pump unit via the heat storage unit, and a flow path that connects the low temperature section and the heat pump unit via the first bypass pipe without passing through the heat storage unit. , can be switched.
　本開示によれば、エネルギー効率の向上に有利なヒートポンプ給湯装置を得ることができる。 According to the present disclosure, it is possible to obtain a heat pump water heater that is advantageous in improving energy efficiency.
実施の形態１のヒートポンプ給湯装置の構成図である。1 is a configuration diagram of a heat pump water heater according to Embodiment 1. FIG. 実施の形態１のヒートポンプ給湯装置の機能ブロック図である。2 is a functional block diagram of the heat pump water heater of Embodiment 1. FIG. 実施の形態１における制御部の機能を実現する構成の一例を示す図である。3 is a diagram showing an example of a configuration for realizing functions of a control unit according to Embodiment 1; FIG. 実施の形態１のヒートポンプ給湯装置による沸き上げ運転の例を示すフロー図である。4 is a flow chart showing an example of a boiling operation by the heat pump water heater of Embodiment 1. FIG. 実施の形態１のヒートポンプ給湯装置による出湯運転の例を示すフロー図である。FIG. 2 is a flow diagram showing an example of a hot water supply operation by the heat pump water heater of Embodiment 1;
　以下、実施の形態について、添付の図面を参照して説明する。なお、各図において共通または対応する要素には、同一の符号を付すものとし、本開示では、重複する説明を簡略化または省略する。なお、本開示は、以下に説明する実施の形態に限定されるものではなく、以下の実施の形態によって開示される構成のあらゆる組合せおよび変形例を含み得るものである。 Hereinafter, embodiments will be described with reference to the attached drawings. Elements that are common or correspond to each figure are denoted by the same reference numerals, and overlapping descriptions are simplified or omitted in the present disclosure. In addition, the present disclosure is not limited to the embodiments described below, and may include all combinations and modifications of the configurations disclosed by the following embodiments.
実施の形態１．
　図１は、実施の形態１のヒートポンプ給湯装置の構成図である。図２は、実施の形態１のヒートポンプ給湯装置の機能ブロック図である。図２は、本実施の形態に係るヒートポンプ給湯装置の主たる機能を抜粋して示している。 Embodiment 1.
FIG. 1 is a configuration diagram of a heat pump water heater according to Embodiment 1. FIG. FIG. 2 is a functional block diagram of the heat pump water heater of Embodiment 1. FIG. FIG. 2 shows an excerpt of the main functions of the heat pump water heater according to the present embodiment.
　図１に示すように、本実施の形態に係るヒートポンプ給湯装置は、ヒートポンプユニット１０１と、貯湯ユニット１０２と、から構成される。ヒートポンプユニット１０１は、水を加熱する加熱手段として機能する。ヒートポンプユニット１０１には、貯湯ユニット１０２から水が供給される。ヒートポンプユニット１０１は、貯湯ユニット１０２から供給された水を加熱する。 As shown in FIG. 1, the heat pump water heater according to the present embodiment is composed of a heat pump unit 101 and a hot water storage unit 102 . The heat pump unit 101 functions as heating means for heating water. Water is supplied to the heat pump unit 101 from the hot water storage unit 102 . The heat pump unit 101 heats water supplied from the hot water storage unit 102 .
　ヒートポンプユニット１０１は、送風ファン１０３、空気熱交換器１０４、圧縮機１０５、水熱交換器１０６および減圧装置１０７を備える。 The heat pump unit 101 includes a blower fan 103 , an air heat exchanger 104 , a compressor 105 , a water heat exchanger 106 and a decompression device 107 .
　送風ファン１０３は、空気熱交換器１０４を冷却するために送風を行う機器である。空気熱交換器１０４では、大気と冷媒との間での熱交換が行われる。空気熱交換器１０４内では、冷媒が大気中の熱を吸収する。空気熱交換器１０４内で吸熱した冷媒は、圧縮機１０５へ送られる。 The blower fan 103 is a device that blows air to cool the air heat exchanger 104 . The air heat exchanger 104 exchanges heat between the atmosphere and the refrigerant. Within the air heat exchanger 104, the refrigerant absorbs heat from the atmosphere. The refrigerant that has absorbed heat in air heat exchanger 104 is sent to compressor 105 .
　圧縮機１０５へ送られた冷媒は、圧縮されて高温高圧状態へ変化する。圧縮機１０５で圧縮された冷媒は、水熱交換器１０６へ送られる。水熱交換器１０６では、貯湯ユニット１０２から供給される水と高温冷媒との間での熱交換が行われる。貯湯ユニット１０２からヒートポンプユニット１０１へ供給される水は、水熱交換器１０６において加熱される。水熱交換器１０６において熱交換された冷媒は、減圧装置１０７へ送られる。 　The refrigerant sent to the compressor 105 is compressed and changed to a high temperature and high pressure state. The refrigerant compressed by compressor 105 is sent to water heat exchanger 106 . The water heat exchanger 106 exchanges heat between the water supplied from the hot water storage unit 102 and the high-temperature refrigerant. Water supplied from hot water storage unit 102 to heat pump unit 101 is heated in water heat exchanger 106 . The refrigerant heat-exchanged in the water heat exchanger 106 is sent to the decompression device 107 .
　減圧装置１０７では、冷媒の膨張、すなわち減圧が行われる。減圧装置１０７で減圧した冷媒は、空気熱交換器１０４へ送られる。ヒートポンプユニット１０１では、上記のようにして冷媒が循環する。 The decompression device 107 expands the refrigerant, that is, decompresses it. The refrigerant decompressed by decompression device 107 is sent to air heat exchanger 104 . In the heat pump unit 101, the refrigerant circulates as described above.
　本実施の形態において、貯湯ユニット１０２は、水を蓄える貯湯タンク１０８および熱を蓄える蓄熱ユニット１０９を備える。貯湯タンク１０８は、ヒートポンプユニット１０１によって加熱された水を蓄える高温部と、当該高温部に蓄えられる水よりも低温の水を蓄える低温部と、を有する。蓄熱ユニット１０９は、貯湯タンク１０８の低温部からヒートポンプユニット１０１へ水を供給する入水配管１１７を流れる水から熱を吸収して蓄える。蓄熱ユニット１０９による吸熱によって、ヒートポンプユニット１０１へ供給される水の入水温度を低下させることができる。これにより、ヒートポンプユニット１０１の熱交換効率を向上させることができる。なお、蓄熱ユニット１０９は、ヒートポンプユニット１０１の外部に設けられていてもよい。 In this embodiment, the hot water storage unit 102 includes a hot water storage tank 108 that stores water and a heat storage unit 109 that stores heat. The hot water storage tank 108 has a high temperature section that stores water heated by the heat pump unit 101 and a low temperature section that stores water at a lower temperature than the water stored in the high temperature section. The heat storage unit 109 absorbs and stores heat from water flowing through the water inlet pipe 117 that supplies water from the low temperature portion of the hot water storage tank 108 to the heat pump unit 101 . Due to the heat absorption by the heat storage unit 109, the incoming water temperature of the water supplied to the heat pump unit 101 can be lowered. Thereby, the heat exchange efficiency of the heat pump unit 101 can be improved. Note that the heat storage unit 109 may be provided outside the heat pump unit 101 .
　入水配管１１７は、貯湯タンク１０８の低温部とヒートポンプユニット１０１とを接続している。本実施の形態においては、入水配管１１７は、蓄熱ユニット１０９を通る。入水配管１１７には、沸き上げポンプ１２２が設けられる。沸き上げポンプ１２２は、貯湯タンク１０８とヒートポンプユニット１０１との間で水を循環させるためのポンプである。 The water inlet pipe 117 connects the low temperature part of the hot water storage tank 108 and the heat pump unit 101 . In this embodiment, water inlet pipe 117 passes through heat storage unit 109 . A boiling pump 122 is provided in the water inlet pipe 117 . Boiling pump 122 is a pump for circulating water between hot water storage tank 108 and heat pump unit 101 .
　図１に示すように、本実施の形態に係るヒートポンプ給湯装置は、入水配管１１７に設けられた第１分岐弁１１０を備える。第１分岐弁１１０は、入水配管１１７上の流路を切り替えるための機器である。第１分岐弁１１０は、貯湯タンク１０８の低温部と蓄熱ユニット１０９との間に設けられる。 As shown in FIG. 1, the heat pump water heater according to the present embodiment includes first branch valve 110 provided in water inlet pipe 117 . The first branch valve 110 is a device for switching the flow path on the water inlet pipe 117 . First branch valve 110 is provided between the low temperature portion of hot water storage tank 108 and heat storage unit 109 .
　第１分岐弁１１０には、第１バイパス配管１１５が接続される。第１バイパス配管１１５は、蓄熱ユニット１０９およびヒートポンプユニット１０１の間と、第１分岐弁１１０と、を接続する。第１バイパス配管１１５は、蓄熱ユニット１０９とヒートポンプユニット１０１との間において入水配管１１７から分岐して、第１分岐弁１１０に接続する配管である。 A first bypass pipe 115 is connected to the first branch valve 110 . First bypass pipe 115 connects between heat storage unit 109 and heat pump unit 101 and first branch valve 110 . The first bypass pipe 115 is a pipe branched from the water inlet pipe 117 between the heat storage unit 109 and the heat pump unit 101 and connected to the first branch valve 110 .
　第１分岐弁１１０は、貯湯タンク１０８の低温部とヒートポンプユニット１０１とが蓄熱ユニット１０９を経由して繋がる流路と、貯湯タンク１０８の低温部とヒートポンプユニット１０１が蓄熱ユニット１０９を経由せずに第１バイパス配管１１５を経由して繋がる流路と、を切り替え可能である。 The first branch valve 110 connects the low temperature portion of the hot water storage tank 108 and the heat pump unit 101 via the heat storage unit 109 , and the low temperature portion of the hot water storage tank 108 and the heat pump unit 101 without the heat storage unit 109 . The channel connected via the first bypass pipe 115 can be switched.
　本実施の形態によれば、第１分岐弁１１０を制御することで、蓄熱ユニット１０９を介さずに貯湯タンク１０８からヒートポンプユニット１０１へ水を供給することができる。これにより、ヒートポンプユニット１０１へ供給される水の入水温度が蓄熱ユニット１０９によって上昇してしまうことを回避することができる。本実施の形態によれば、エネルギー効率の向上に有利なヒートポンプ給湯装置を得ることができる。 According to the present embodiment, by controlling first branch valve 110 , water can be supplied from hot water storage tank 108 to heat pump unit 101 without going through heat storage unit 109 . As a result, it is possible to prevent the temperature of the water supplied to the heat pump unit 101 from rising due to the heat storage unit 109 . According to the present embodiment, it is possible to obtain a heat pump water heater that is advantageous in improving energy efficiency.
　また、本実施の形態に係るヒートポンプ給湯装置は、ヒートポンプユニット１０１から貯湯タンク１０８の高温部へ水を供給する出湯配管１１８を備える。出湯配管１１８は、貯湯タンク１０８の高温部とヒートポンプユニット１０１とを接続している。この出湯配管１１８は、図１に示すように、蓄熱ユニット１０９を通ってもよい。蓄熱ユニット１０９は、出湯配管１１８を流れる水から熱を吸収して蓄えてもよい。 The heat pump hot water supply apparatus according to the present embodiment also includes hot water outlet pipe 118 for supplying water from heat pump unit 101 to the high temperature portion of hot water storage tank 108 . The hot water pipe 118 connects the high temperature portion of the hot water storage tank 108 and the heat pump unit 101 . This outlet pipe 118 may pass through the heat storage unit 109 as shown in FIG. The heat storage unit 109 may absorb and store heat from the water flowing through the hot water supply pipe 118 .
　図１に示すように、本実施の形態に係るヒートポンプ給湯装置は、出湯配管１１８に設けられた第２分岐弁１１１を備える。第２分岐弁１１１は、出湯配管１１８上の流路を切り替えるための機器である。第２分岐弁１１１は、ヒートポンプユニット１０１と蓄熱ユニット１０９との間に設けられる。 As shown in FIG. 1, the heat pump water heater according to the present embodiment includes second branch valve 111 provided in hot water outlet pipe 118 . The second branch valve 111 is a device for switching the flow path on the hot water outlet pipe 118 . Second branch valve 111 is provided between heat pump unit 101 and heat storage unit 109 .
　第２分岐弁１１１には、第２バイパス配管１１６が接続される。第２バイパス配管１１６は、蓄熱ユニット１０９およびヒートポンプユニット１０１の間と、第２分岐弁１１１と、を接続する。第２バイパス配管１１６は、蓄熱ユニット１０９と貯湯タンク１０８の高温部との間において出湯配管１１８から分岐して、第２分岐弁１１１に接続する配管である。 A second bypass pipe 116 is connected to the second branch valve 111 . The second bypass pipe 116 connects between the heat storage unit 109 and the heat pump unit 101 and the second branch valve 111 . The second bypass pipe 116 is a pipe branched from the hot water outlet pipe 118 between the heat storage unit 109 and the hot part of the hot water storage tank 108 and connected to the second branch valve 111 .
　第２分岐弁１１１は、貯湯タンク１０８の高温部とヒートポンプユニット１０１とが蓄熱ユニット１０９を経由して繋がる流路と、貯湯タンク１０８の高温部とヒートポンプユニットと１０１が蓄熱ユニット１０９を経由せずに第２バイパス配管１１６を経由して繋がる流路と、を切り替え可能である。 The second branch valve 111 connects the high temperature portion of the hot water storage tank 108 and the heat pump unit 101 via the heat storage unit 109, and the high temperature portion of the hot water storage tank 108 and the heat pump unit 101 without the heat storage unit 109. and the flow path connected via the second bypass pipe 116 can be switched.
　また、本実施の形態に係るヒートポンプ給湯装置は、貯湯タンク１０８の高温部と蓄熱ユニット１０９との間で出湯配管１１８に設けられた第３分岐弁１１２を備えていてもよい。第３分岐弁１１２は、貯湯タンク１０８の高温部と接続された混合弁１１３に接続される。混合弁１１３は、貯湯タンク１０８の高温部からの流出水と市水等の水源からの低温水とを混合して、ユーザへ供給される水の出湯温度を調整する機能を有するものである。混合弁１１３には、市水等の水源が接続される。また、市水等の水源は、貯湯タンク１０８の低温部にも接続される。一例として、貯湯ユニット１０２は、市水等の水源から供給される低温水を所定の圧力へ調整するための減圧弁１１４を備える。 Further, the heat pump water heater according to the present embodiment may include third branch valve 112 provided in hot water outlet pipe 118 between the high temperature portion of hot water storage tank 108 and heat storage unit 109 . The third branch valve 112 is connected to a mixing valve 113 that is connected to the high temperature portion of the hot water storage tank 108 . The mixing valve 113 has a function of mixing the outflow water from the high-temperature part of the hot water storage tank 108 and the low-temperature water from a water source such as city water to adjust the outlet temperature of the water supplied to the user. A water source such as city water is connected to the mixing valve 113 . A water source such as city water is also connected to the low temperature part of the hot water storage tank 108 . As an example, the hot water storage unit 102 includes a pressure reducing valve 114 for adjusting low-temperature water supplied from a water source such as city water to a predetermined pressure.
　図１に示すように、本実施の形態に係るヒートポンプ給湯装置は、ヒートポンプユニット流出水温検知部１１９と、蓄熱ユニット内温度検知部１２０と、貯湯タンク低温部流出水温検知部１２１と、を備えていてもよい。ヒートポンプユニット流出水温検知部１１９は、ヒートポンプユニット１０１から流出する水の温度を検知する。蓄熱ユニット内温度検知部１２０は、蓄熱ユニット１０９内の温度を検知する。貯湯タンク低温部流出水温検知部１２１は、貯湯タンク１０８の低温部から流出する水の温度を検知する。なお、これらの各検知部は、複数備えられていてもよい。 As shown in FIG. 1, the heat pump water heater according to the present embodiment includes a heat pump unit outflow water temperature detection unit 119, a heat storage unit internal temperature detection unit 120, and a hot water storage tank low temperature part outflow water temperature detection unit 121. may A heat pump unit outflow water temperature detector 119 detects the temperature of water flowing out of the heat pump unit 101 . The heat storage unit internal temperature detection unit 120 detects the temperature inside the heat storage unit 109 . Hot water storage tank low temperature part outflow water temperature detection unit 121 detects the temperature of water flowing out from the low temperature part of hot water storage tank 108 . A plurality of these detection units may be provided.
　一例として、本実施の形態に係るヒートポンプ給湯装置は、上記の各検知部の検知結果に応じて制御される。図２に示すように、本実施の形態に係るヒートポンプ給湯装置は、当該ヒートポンプ給湯装置の制御を行うための制御部１３０を備えていてもよい。制御部１３０は、例えば、ヒートポンプユニット流出水温検知部１１９と、蓄熱ユニット内温度検知部１２０と、貯湯タンク低温部流出水温検知部１２１と、の検知結果に応じて、第１分岐弁１１０、第２分岐弁１１１および第３分岐弁１１２等を制御する。 As an example, the heat pump water heater according to the present embodiment is controlled according to the detection result of each detection unit described above. As shown in FIG. 2, the heat pump water heater according to the present embodiment may include a control unit 130 for controlling the heat pump water heater. For example, the control unit 130 controls the first branch valve 110, the second It controls the two branch valve 111, the third branch valve 112, and the like.
　図３は、実施の形態１における制御部１３０の機能を実現する構成の一例を示す図である。制御部１３０の機能は、例えば、処理回路により実現される。処理回路は、専用ハードウェア１４０であってもよい。処理回路は、プロセッサ１４１およびメモリ１４２を備えていてもよい。処理回路の一部が専用ハードウェア１４０として形成され、且つ、当該処理回路は更にプロセッサ１４１およびメモリ１４２を備えていてもよい。図３に示す例において、処理回路の一部は専用ハードウェア１４０として形成されている。また、図３に示す例において、処理回路は、プロセッサ１４１およびメモリ１４２を更に備えている。 FIG. 3 is a diagram showing an example of a configuration that implements the functions of the control unit 130 according to the first embodiment. The functions of the control unit 130 are implemented by, for example, a processing circuit. The processing circuitry may be dedicated hardware 140 . The processing circuitry may comprise processor 141 and memory 142 . A portion of the processing circuitry may be formed as dedicated hardware 140 and may further comprise a processor 141 and memory 142 . In the example shown in FIG. 3, part of the processing circuitry is formed as dedicated hardware 140 . Also, in the example shown in FIG. 3, the processing circuitry further comprises a processor 141 and a memory 142 .
　一部が少なくとも１つの専用ハードウェア１４０である処理回路には、例えば、単一回路、複合回路、プログラム化したプロセッサ、並列プログラム化したプロセッサ、ＡＳＩＣ、ＦＰＧＡ、またはこれらを組み合わせたものが該当する。 A processing circuit, part of which is at least one piece of dedicated hardware 140, can be, for example, a single circuit, multiple circuits, programmed processors, parallel programmed processors, ASICs, FPGAs, or combinations thereof. .
　処理回路が少なくとも１つのプロセッサ１４１および少なくとも１つのメモリ１４２を備える場合、制御部１３０の各機能は、ソフトウェア、ファームウェア、またはソフトウェアとファームウェアとの組み合わせにより実現される。 When the processing circuit includes at least one processor 141 and at least one memory 142, each function of the control unit 130 is implemented by software, firmware, or a combination of software and firmware.
　ソフトウェアおよびファームウェアはプログラムとして記述され、メモリ１４２に格納される。プロセッサ１４１は、メモリ１４２に記憶されたプログラムを読み出して実行することにより、各部の機能を実現する。プロセッサ１４１は、ＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）、中央処理装置、処理装置、演算装置、マイクロプロセッサ、マイクロコンピュータあるいはＤＳＰともいう。メモリ１４２には、例えば、ＲＡＭ、ＲＯＭ、フラッシュメモリー、ＥＰＲＯＭおよびＥＥＰＲＯＭ等の不揮発性または揮発性の半導体メモリ、または磁気ディスク、フレキシブルディスク、光ディスク、コンパクトディスク、ミニディスクおよびＤＶＤ等が該当する。 The software and firmware are written as programs and stored in the memory 142. The processor 141 reads out and executes programs stored in the memory 142 to achieve the functions of each unit. The processor 141 is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. The memory 142 corresponds to, for example, non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM and EEPROM, magnetic disk, flexible disk, optical disk, compact disk, mini-disk and DVD.
　このように、処理回路は、ハードウェア、ソフトウェア、ファームウェア、またはこれらの組み合わせによって、制御部１３０の各機能を実現することができる。 Thus, the processing circuit can realize each function of the control unit 130 by hardware, software, firmware, or a combination thereof.
　次に、以上のように構成されたヒートポンプ給湯装置の動作例について説明する。図４は、実施の形態１のヒートポンプ給湯装置による沸き上げ運転の例を示すフロー図である。貯湯タンク１０８内の残湯量が少なくなると、必要に応じてヒートポンプユニット１０１を稼働して沸き上げ運転を実施し、貯湯タンク１０８内への貯湯が行われる。 Next, an operation example of the heat pump water heater configured as above will be described. FIG. 4 is a flow chart showing an example of a boiling operation by the heat pump water heater of Embodiment 1. FIG. When the amount of hot water remaining in the hot water storage tank 108 becomes small, the heat pump unit 101 is operated as necessary to perform a boiling operation, and hot water is stored in the hot water storage tank 108 .
　沸きあげ運転が開始すると（ステップＳ１００）、貯湯タンク１０８の低温部から流出する水の温度が蓄熱ユニット１０９内の温度より高いか低いかの判定が行われる（ステップＳ１０１）。この判定は、上述した各検知部の検知結果から、制御部１３０が行う。 When the boiling operation starts (step S100), it is determined whether the temperature of the water flowing out from the low temperature part of the hot water storage tank 108 is higher or lower than the temperature inside the heat storage unit 109 (step S101). This determination is made by the control unit 130 based on the detection result of each detection unit described above.
　貯湯タンク１０８の低温部から流出する水の温度が蓄熱ユニット１０９内の温度より高い場合、第１分岐弁１１０によって、貯湯タンク１０８と蓄熱ユニット１０９とが接続され、蓄熱ユニット１０９による蓄熱が行われる（ステップＳ１０２）。貯湯タンク１０８の低温部から流出する水の温度が蓄熱ユニット１０９内の温度より低い場合、第１分岐弁１１０によって、貯湯タンク１０８とヒートポンプユニット１０１とが蓄熱ユニット１０９を介さずに接続され、蓄熱ユニット１０９による蓄熱は行われない（ステップＳ１０３）。 When the temperature of the water flowing out from the low temperature part of the hot water storage tank 108 is higher than the temperature in the heat storage unit 109, the hot water storage tank 108 and the heat storage unit 109 are connected by the first branch valve 110, and heat is stored by the heat storage unit 109. (Step S102). When the temperature of the water flowing out of the low-temperature portion of hot water storage tank 108 is lower than the temperature in heat storage unit 109, hot water storage tank 108 and heat pump unit 101 are connected by first branch valve 110 without interposing heat storage unit 109, and the heat storage unit 109 is connected. No heat is stored by the unit 109 (step S103).
　上記の動作により、蓄熱ユニット１０９内に温度が貯湯タンク１０８の低温部から流出する水の温度よりも低い場合には、蓄熱ユニット１０９による蓄熱が行われる。これにより、ヒートポンプユニット１０１への入水温度を低下させることができる。また、蓄熱ユニット１０９内に温度が貯湯タンク１０８の低温部から流出する水の温度よりも高い場合には、蓄熱ユニット１０９による蓄熱が行われない。これにより、ヒートポンプユニット１０１への入水温度の蓄熱ユニット１０９による上昇を回避することができる。 By the above operation, when the temperature in the heat storage unit 109 is lower than the temperature of the water flowing out from the low temperature part of the hot water storage tank 108, the heat storage unit 109 stores heat. As a result, the temperature of water entering the heat pump unit 101 can be lowered. Further, when the temperature in the heat storage unit 109 is higher than the temperature of the water flowing out from the low temperature portion of the hot water storage tank 108, the heat storage unit 109 does not store heat. As a result, an increase in the temperature of water entering the heat pump unit 101 due to the heat storage unit 109 can be avoided.
　また、図５は、実施の形態１のヒートポンプ給湯装置による出湯運転の例を示すフロー図である。出湯運転とは、ヒートポンプユニット給湯装置が外部へ湯を供給する運転である。出湯運転には、例えば、浴槽への湯はりおよび任意の給湯端末への出湯等の各種の運転が該当する。 FIG. 5 is a flowchart showing an example of the hot water supply operation by the heat pump water heater of Embodiment 1. FIG. The hot water supply operation is an operation in which the heat pump unit water heater supplies hot water to the outside. The hot water supply operation includes, for example, various operations such as filling hot water into a bathtub and supplying hot water to an arbitrary hot water supply terminal.
　出湯運転が開始すると（ステップＳ２００）、ヒートポンプユニット１０１から流出する水の温度が蓄熱ユニット１０９内の温度より高いか低いかの判定が行われる（ステップＳ２０１）。この判定は、上述した各検知部の検知結果から、制御部１３０が行う。 When the hot water supply operation starts (step S200), it is determined whether the temperature of the water flowing out of the heat pump unit 101 is higher or lower than the temperature in the heat storage unit 109 (step S201). This determination is made by the control unit 130 based on the detection result of each detection unit described above.
　ヒートポンプユニット１０１から流出する水の温度が蓄熱ユニット１０９内の温度より低い場合、第２分岐弁１１１によって、貯湯タンク１０８と蓄熱ユニット１０９とが接続され、ヒートポンプユニット１０１からの流出水の温度を上昇させる。（ステップＳ２０２）。一方、ヒートポンプユニット１０１から流出する水の温度が蓄熱ユニット１０９内の温度より高い場合、第２分岐弁１１１は、ヒートポンプユニット１０１と貯湯タンク１０８の高温部とが蓄熱ユニット１０９を経由せずに第２バイパス配管１１６を経由して接続するよう動作する（ステップＳ２０３）。ヒートポンプユニット１０１からの流出水は、貯湯タンク１０８の高温部からの流出水あるいは市水等と混合弁１１３において混合された後、出湯される。本例であれば、蓄熱ユニット１０９とヒートポンプユニット１０１からの流出水との間での熱交換により、エネルギー損失の抑制が可能となる。 When the temperature of the water flowing out of the heat pump unit 101 is lower than the temperature in the heat storage unit 109, the second branch valve 111 connects the hot water tank 108 and the heat storage unit 109 to increase the temperature of the water flowing out of the heat pump unit 101. Let (Step S202). On the other hand, when the temperature of water flowing out of heat pump unit 101 is higher than the temperature in heat storage unit 109 , second branch valve 111 allows heat pump unit 101 and the high temperature portion of hot water storage tank 108 to flow through heat storage unit 109 without passing through heat storage unit 109 . 2 bypass pipe 116 (step S203). The outflow water from the heat pump unit 101 is mixed with the outflow water from the high-temperature portion of the hot water storage tank 108, city water, or the like in the mixing valve 113 and then discharged. In this example, energy loss can be suppressed by heat exchange between the heat storage unit 109 and the outflow water from the heat pump unit 101 .
　また、ヒートポンプユニット１０１から流出する水の温度が蓄熱ユニット１０９内の温度より高く、且つ、貯湯タンク１０８の低温部から流出する水の温度が蓄熱ユニット１０９内の温度より高い場合には、上述の沸き上げ運転を自動的に開始してもよい。沸き上げ運転においてが、上述した通り、貯湯タンク１０８の低温部から流出する水の温度が蓄熱ユニット１０９内の温度より高いか低いかの判定結果に応じて、第１分岐弁１１０による流路制御が実行される。 Further, when the temperature of the water flowing out of the heat pump unit 101 is higher than the temperature in the heat storage unit 109 and the temperature of the water flowing out from the low temperature part of the hot water storage tank 108 is higher than the temperature in the heat storage unit 109, the above-mentioned The boiling operation may be started automatically. In the boiling operation, as described above, the flow path is controlled by the first branch valve 110 according to the determination result as to whether the temperature of the water flowing out from the low temperature portion of the hot water storage tank 108 is higher or lower than the temperature in the heat storage unit 109. is executed.
　本開示に係るヒートポンプ給湯装置は、例えば、浴槽への湯はり、あるいは、任意の給湯端末への出湯、に利用することができる。 The heat pump water heater according to the present disclosure can be used, for example, to fill hot water into a bathtub or to supply hot water to any hot water supply terminal.
　１０１　ヒートポンプユニット、　１０２　貯湯ユニット、　１０３　送風ファン、　１０４　空気熱交換器、　１０５　圧縮機、　１０６　水熱交換器、　１０７　減圧装置、　１０８　貯湯タンク、　１０９　蓄熱ユニット、　１１０　第１分岐弁、　１１１　第２分岐弁、　１１２　第３分岐弁、　１１３　混合弁、　１１４　減圧弁、　１１５　第１バイパス配管、　１１６　第２バイパス配管、　１１７　入水配管、　１１８　出湯配管、　１１９　ヒートポンプユニット流出水温検知部、　１２０　蓄熱ユニット内温度検知部、　１２１　貯湯タンク低温部流出水温検知部、　１３０　制御部、　１４０　専用ハードウェア、　１４１　プロセッサ、　１４２　メモリ 101 heat pump unit, 102 hot water storage unit, 103 blower fan, 104 air heat exchanger, 105 compressor, 106 water heat exchanger, 107 decompression device, 108 hot water storage tank, 109 heat storage unit, 110 first branch valve, 111 second branch valve, 112 third branch valve, 113 mixing valve, 114 pressure reducing valve, 115 first bypass pipe, 116 second bypass pipe, 117 water inlet pipe, 118 hot water outlet pipe, 119 heat pump unit outflow water temperature detector, 120 heat storage unit internal temperature detection Unit, 121 Outflow water temperature detection unit at low temperature part of hot water storage tank, 130 Control unit, 140 Dedicated hardware, 141 Processor, 142 Memory

Claims (5)

  1. 　水を加熱するヒートポンプユニットと、
    　前記ヒートポンプユニットによって加熱された水を蓄える高温部と当該高温部に蓄えられる水よりも低温の水を蓄える低温部とを有する貯湯タンクと、
    　前記低温部から前記ヒートポンプユニットへ水を供給する入水配管と、
    　前記入水配管を流れる水から熱を吸収して熱を蓄える蓄熱ユニットと、
    　前記低温部と前記蓄熱ユニットとの間に設けられ、前記入水配管上の流路を切り替える第１分岐弁と、
    　前記蓄熱ユニットおよび前記ヒートポンプユニットの間と前記第１分岐弁とを接続する第１バイパス配管と、
    　を備え、
    　前記第１分岐弁は、前記低温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由して繋がる流路と、前記低温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由せずに前記第１バイパス配管を経由して繋がる流路と、を切り替え可能であるヒートポンプ給湯装置。     a heat pump unit for heating water;
    a hot water storage tank having a high temperature section for storing water heated by the heat pump unit and a low temperature section for storing water having a lower temperature than the water stored in the high temperature section;
    a water inlet pipe that supplies water from the low temperature section to the heat pump unit;
    a heat storage unit that absorbs heat from the water flowing through the water inlet pipe and stores the heat;
    a first branch valve provided between the low temperature section and the heat storage unit for switching a flow path on the water inlet pipe;
    a first bypass pipe connecting between the heat storage unit and the heat pump unit and the first branch valve;
    with
    The first branch valve includes a flow path connecting the low temperature section and the heat pump unit via the heat storage unit, and a first bypass pipe connecting the low temperature section and the heat pump unit without passing through the heat storage unit. A heat pump water heater capable of switching between a flow path connected via a
  2. 　前記第１分岐弁は、
    　前記低温部から流出する水の温度が前記蓄熱ユニット内の温度よりも高い場合には、前記入水配管上の流路を、前記低温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由して繋がる流路とし、
    　前記低温部から流出する水の温度が前記蓄熱ユニット内の温度よりも低い場合には、前記入水配管上の流路を、前記低温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由せずに前記第１バイパス配管を経由して繋がる流路とする請求項１に記載のヒートポンプ給湯装置。     The first branch valve is
    When the temperature of the water flowing out of the low-temperature part is higher than the temperature in the heat storage unit, the low-temperature part and the heat pump unit are connected via the heat storage unit in the flow path on the water inlet pipe. as a flow path,
    When the temperature of the water flowing out of the low-temperature part is lower than the temperature in the heat storage unit, the low-temperature part and the heat pump unit pass through the flow path on the water inlet pipe without passing through the heat storage unit. The heat pump water heater according to claim 1, wherein the flow path is connected via the first bypass pipe.
  3. 　前記ヒートポンプユニットから前記高温部へ水を供給する出湯配管と、
    　前記ヒートポンプユニットと前記蓄熱ユニットとの間に設けられ、前記出湯配管上の流路を切り替える第２分岐弁と、
    　前記蓄熱ユニットおよび前記高温部の間と前記第２分岐弁とを接続する第２バイパス配管と、
    　を備え、
    　前記蓄熱ユニットは、前記出湯配管を流れる水から熱を吸収して熱を蓄え、
    　前記第２分岐弁は、前記高温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由して繋がる流路と、前記高温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由せずに前記第２バイパス配管を経由して繋がる流路と、を切り替え可能である請求項１または請求項２に記載のヒートポンプ給湯装置。     a hot water supply pipe for supplying water from the heat pump unit to the high temperature section;
    a second branch valve provided between the heat pump unit and the heat storage unit for switching a flow path on the hot water supply pipe;
    a second bypass pipe that connects between the heat storage unit and the high temperature section and the second branch valve;
    with
    The heat storage unit stores heat by absorbing heat from water flowing through the hot water supply pipe,
    The second branch valve includes a flow path that connects the high temperature section and the heat pump unit via the heat storage unit, and a second bypass pipe that connects the high temperature section and the heat pump unit without passing through the heat storage unit. 3. The heat pump hot water supply apparatus according to claim 1, wherein the flow path connected via the can be switched.
  4. 　前記第２分岐弁は、
    　前記ヒートポンプユニットから流出する水の温度が前記蓄熱ユニット内の温度よりも低い場合には、前記出湯配管上の流路を、前記高温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由して繋がる流路とし、
    　前記ヒートポンプユニットから流出する水の温度が前記蓄熱ユニット内の温度よりも高い場合には、前記入水配管上の流路を、前記高温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由せずに前記第２バイパス配管を経由して繋がる流路とする請求項３に記載のヒートポンプ給湯装置。     The second branch valve is
    When the temperature of the water flowing out of the heat pump unit is lower than the temperature in the heat storage unit, the high temperature section and the heat pump unit are connected via the heat storage unit in the flow path on the hot water outlet pipe. as a road,
    When the temperature of the water flowing out of the heat pump unit is higher than the temperature in the heat storage unit, the high temperature part and the heat pump unit flow through the flow path on the water inlet pipe without passing through the heat storage unit. 4. The heat pump water heater according to claim 3, wherein the flow path is connected via the second bypass pipe.
  5. 　前記第２分岐弁は、前記ヒートポンプユニットから流出する水を混合弁によって混合して外部へ供給する出湯を行う際に、
    　前記ヒートポンプユニットから流出する水の温度が前記蓄熱ユニット内の温度よりも低い場合には、前記出湯配管上の流路を、前記高温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由して繋がる流路とし、
    　前記ヒートポンプユニットから流出する水の温度が前記蓄熱ユニット内の温度よりも高い場合には、前記入水配管上の流路を、前記高温部と前記ヒートポンプユニットとが前記蓄熱ユニットを経由せずに前記第２バイパス配管を経由して繋がる流路とする請求項３に記載のヒートポンプ給湯装置。     When the second branch valve mixes the water flowing out of the heat pump unit by the mixing valve and supplies the hot water to the outside,
    When the temperature of the water flowing out of the heat pump unit is lower than the temperature in the heat storage unit, the high temperature section and the heat pump unit are connected via the heat storage unit in the flow path on the hot water outlet pipe. as a road,
    When the temperature of the water flowing out of the heat pump unit is higher than the temperature in the heat storage unit, the high temperature part and the heat pump unit flow through the flow path on the water inlet pipe without passing through the heat storage unit. 4. The heat pump water heater according to claim 3, wherein the flow path is connected via the second bypass pipe.
PCT/JP2021/024402 2021-06-28 2021-06-28 Heat pump water heater WO2023275946A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003035141A (en) * 2001-07-26 2003-02-07 Mitsubishi Motors Corp Cooling water control device for engine
JP2013213596A (en) * 2012-04-02 2013-10-17 Panasonic Corp Heat pump water heater
CN105546851A (en) * 2016-01-12 2016-05-04 山东理工大学 Solar heat accumulation system capable of intelligently regulating opening and closing of valves
CN112524822A (en) * 2021-01-05 2021-03-19 浙江态能动力技术有限公司 Solar energy system and carbon dioxide circulation control system thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003035141A (en) * 2001-07-26 2003-02-07 Mitsubishi Motors Corp Cooling water control device for engine
JP2013213596A (en) * 2012-04-02 2013-10-17 Panasonic Corp Heat pump water heater
CN105546851A (en) * 2016-01-12 2016-05-04 山东理工大学 Solar heat accumulation system capable of intelligently regulating opening and closing of valves
CN112524822A (en) * 2021-01-05 2021-03-19 浙江态能动力技术有限公司 Solar energy system and carbon dioxide circulation control system thereof

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