JP4088790B2 - Heat pump type water heater and its operating method - Google Patents

Heat pump type water heater and its operating method Download PDF

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JP4088790B2
JP4088790B2 JP2003419632A JP2003419632A JP4088790B2 JP 4088790 B2 JP4088790 B2 JP 4088790B2 JP 2003419632 A JP2003419632 A JP 2003419632A JP 2003419632 A JP2003419632 A JP 2003419632A JP 4088790 B2 JP4088790 B2 JP 4088790B2
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hot water
heat exchanger
water supply
pump type
valve
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JP2005180742A (en
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砂穂 舟越
太一 店網
和広 遠藤
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日立アプライアンス株式会社
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    • YGENERAL 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
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    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12Hot water central heating systems using heat pumps

Description

本発明は、ヒートポンプ式給湯機およびその運転方法に係り、特に、空気側熱交換器の除霜運転時における給湯能力を改善する手段に関する。   The present invention relates to a heat pump type hot water heater and an operation method thereof, and more particularly, to a means for improving hot water supply capacity during a defrosting operation of an air side heat exchanger.
給湯と冷房または暖房とを並行してできる冷媒回路が提案されている(例えば、特許文献1,特許文献2参照)。   A refrigerant circuit that can perform hot water supply and cooling or heating in parallel has been proposed (see, for example, Patent Document 1 and Patent Document 2).
特開平5−223402号公報 (第3頁 図1)Japanese Patent Laid-Open No. 5-223402 (page 3 Fig. 1) 特開2002−318028号公報 (第3,4頁 図1,図2)Japanese Patent Laid-Open No. 2002-318028 (Pages 3, 4 and 1)
しかし、上記従来例においては、冬季、空気側熱交換器に霜が着いた場合の除霜運転時には、給湯運転や暖房運転ができなかった。すなわち、寒冷環境下で、もし、給湯運転と除霜運転とを並行した場合、除霜運転に長時間を要するので、給湯能力が著しく低下するという問題があった。   However, in the above conventional example, during the defrosting operation in the winter when frost is formed on the air-side heat exchanger, the hot water supply operation and the heating operation cannot be performed. That is, in a cold environment, if the hot water supply operation and the defrosting operation are performed in parallel, the defrosting operation takes a long time, so that there is a problem that the hot water supply capability is significantly reduced.
本発明の目的は、給湯/冷暖房並行運転型のヒートポンプ式給湯機において、寒冷環境下で、少なくとも給湯運転を停止せずに、空気側熱交換器に付着した霜を溶かす手段を備えたヒートポンプ式給湯機を提供することである。   An object of the present invention is a heat pump type water pump of a hot water supply / cooling / heating parallel operation type heat pump type provided with a means for melting frost adhering to the air side heat exchanger in a cold environment without stopping at least the hot water supply operation. It is to provide a water heater.
本発明は、上記目的を達成するために、第1の圧縮機,第1の四方切替弁,給湯用水側熱交換器,第1の電動膨張弁,冷暖房用熱交換器,第2の電動膨張弁,第1の空気側熱交換器,第1の四方切替弁,第1の圧縮機1の順に接続した第1の冷媒回路と、第2の圧縮機,第2の四方切替弁,給湯用水側熱交換器,第3の電動膨張弁,冷暖房用熱交換器,第4の電動膨張弁,第2の空気側熱交換器,第2の四方切替弁,第2の圧縮機の順に接続した第2の冷媒回路と、循環水を加圧するポンプ,冷暖房用熱交換器,冷暖房用室内熱交換器を含む冷暖房回路と、給湯用水側熱交換器に給水する経路,給湯用水側熱交換器で加熱された湯と給水とを混合し出湯温度を調節する二方弁を含む給湯回路とからなるヒートポンプ式給湯機を提案する。   In order to achieve the above object, the present invention provides a first compressor, a first four-way switching valve, a hot water supply side heat exchanger, a first electric expansion valve, an air conditioning heat exchanger, and a second electric expansion. Valve, first air-side heat exchanger, first four-way switching valve, first refrigerant circuit connected in order of first compressor 1, second compressor, second four-way switching valve, hot water supply water The side heat exchanger, the third electric expansion valve, the air conditioner heat exchanger, the fourth electric expansion valve, the second air side heat exchanger, the second four-way switching valve, and the second compressor were connected in this order. A second refrigerant circuit, a pump for pressurizing circulating water, a cooling / heating heat exchanger, a cooling / heating indoor heat exchanger, a path for supplying water to the hot water supply side heat exchanger, and a hot water supply side heat exchanger A heat pump type water heater comprising a hot water supply circuit including a two-way valve that mixes heated hot water and hot water and adjusts the hot water temperature is proposed.
このような構成では、2つの冷媒回路を独立に運転できるので、一方の冷媒回路で除霜運転をしているときでも、他方の冷媒回路により給湯運転や冷暖房運転が可能となる。   In such a configuration, since the two refrigerant circuits can be operated independently, even when the defrosting operation is performed with one refrigerant circuit, the hot water supply operation and the air conditioning operation can be performed with the other refrigerant circuit.
第1の四方切替弁と第2の四方切替弁とを備えたヒートポンプ式給湯機においては、冷房単独運転から給湯および冷房の同時運転に切替える際に、第1の四方切替弁と第2の四方切替弁とを順次切替える。   In a heat pump type water heater provided with a first four-way switching valve and a second four-way switching valve, the first four-way switching valve and the second four-way are used when switching from cooling single operation to simultaneous hot water supply and cooling operation. The switching valve is switched sequentially.
本発明は、また、第1の圧縮機,給湯用水側熱交換器,第1の電動膨張弁,第1の空気側熱交換器,第1の圧縮機の順に接続した第1の冷媒回路と、第2の圧縮機,四方切替弁,給湯用水側熱交換器,第3の電動膨張弁,冷暖房用熱交換器,第4の電動膨張弁,第2の空気側熱交換器,四方切替弁,第2の圧縮機の順に接続した第2の冷媒回路と、循環水を加圧するポンプ,冷暖房用熱交換器,冷暖房用室内熱交換器を含む冷暖房回路と、給湯用水側熱交換器に給水する経路,給湯用水側熱交換器で加熱された湯と給水とを混合し出湯温度を調節する二方弁を含む給湯回路とからなるヒートポンプ式給湯機を提案する。   The present invention also includes a first refrigerant circuit connected in the order of a first compressor, a hot water supply water side heat exchanger, a first electric expansion valve, a first air side heat exchanger, and a first compressor. , Second compressor, four-way switching valve, water-side heat exchanger for hot water supply, third electric expansion valve, heat exchanger for cooling and heating, fourth electric expansion valve, second air-side heat exchanger, four-way switching valve , A second refrigerant circuit connected in the order of the second compressor, a pump for pressurizing circulating water, a cooling / heating heat exchanger, a cooling / heating indoor heat exchanger, and a hot water supply water-side heat exchanger We propose a heat pump type hot water heater comprising a hot water supply circuit including a two-way valve that mixes hot water heated by a hot water supply water-side heat exchanger and hot water and adjusts the hot water temperature.
このような構成では、除霜運転中に暖房運転はできないが、給湯運転は可能であり、前記構成と比べると、構成が単純になる。   In such a configuration, a heating operation cannot be performed during the defrosting operation, but a hot water supply operation is possible, and the configuration becomes simple compared to the above configuration.
前記給湯回路は、給湯用水側熱交換器で加熱された湯の出湯と貯湯とを切替える三方弁と、貯湯タンクとを含むことができる。   The hot water supply circuit may include a three-way valve for switching between hot water discharged from the hot water supply side heat exchanger and hot water storage, and a hot water storage tank.
いずれのヒートポンプ式給湯機においても、給湯用水側熱交換器と並列に床暖房用または天井輻射暖房用の水冷媒熱交換器を設置することも可能である。   In any heat pump type water heater, a water refrigerant heat exchanger for floor heating or ceiling radiant heating can be installed in parallel with the hot water supply water side heat exchanger.
空気側熱交換器に着いた霜を溶かす除霜運転は、第1の冷媒回路および第2の冷媒回路の片方ずつ実行する。   The defrosting operation for melting frost attached to the air-side heat exchanger is executed for each of the first refrigerant circuit and the second refrigerant circuit.
また、冷暖房負荷に応じて、第1の冷媒回路と第2の冷媒回路のうちの一方のみを運転し、運転中の冷媒回路を除霜運転をする場合は、待機中の冷媒回路の運転を開始してから除霜運転をする。   In addition, when only one of the first refrigerant circuit and the second refrigerant circuit is operated according to the heating / cooling load and the operating refrigerant circuit is defrosted, the standby refrigerant circuit is operated. Start defrosting after starting.
本発明によれば、給湯・貯湯運転や冷暖房運転をしながら、それらの運転を停止しないで、除霜運転ができるので、給湯の途中で湯が出なくなったり、冷暖房が止まって不快になることを防止できる。   According to the present invention, the defrosting operation can be performed without stopping the hot water supply / storage operation and the air conditioning operation, so that hot water does not come out during the hot water supply or the air conditioning stops and becomes uncomfortable. Can be prevented.
次に、図1〜図12を参照して、本発明によるヒートポンプ式給湯機の実施形態を説明する。   Next, with reference to FIGS. 1-12, embodiment of the heat pump type water heater by this invention is described.
≪実施形態1≫
図1は、本発明によるヒートポンプ式給湯機の実施形態1の系統構成を示す回路図である。
Embodiment 1
FIG. 1 is a circuit diagram showing a system configuration of Embodiment 1 of a heat pump type water heater according to the present invention.
実施形態1のヒートポンプ式給湯機は、圧縮機1を含む第1の冷媒回路と、圧縮機11を含む第2の冷媒回路と、冷暖房用室内熱交換器61を含む室内冷暖房回路と、給湯用水側熱交換器3およびここで加熱された湯と給水とを混合し出湯温度を調節する二方弁53を含む給湯回路とからなる。   The heat pump type hot water heater of Embodiment 1 includes a first refrigerant circuit including the compressor 1, a second refrigerant circuit including the compressor 11, an indoor air conditioning circuit including an indoor heat exchanger 61 for air conditioning, and hot water supply water. It consists of a side heat exchanger 3 and a hot water supply circuit including a two-way valve 53 for mixing hot water heated here and water supply to adjust the temperature of the hot water.
実施形態1においては、第1の冷媒回路と第2の冷媒回路とが独立している。2つの冷媒回路は、それぞれの圧縮機および空気側熱交換器を持っている。2つの冷媒回路は、水側熱交換器3,5を共有しているが、水側熱交換器3,5内の冷媒流路は独立している。   In the first embodiment, the first refrigerant circuit and the second refrigerant circuit are independent. The two refrigerant circuits have their respective compressors and air side heat exchangers. The two refrigerant circuits share the water-side heat exchangers 3 and 5, but the refrigerant flow paths in the water-side heat exchangers 3 and 5 are independent.
第1の冷媒回路は、第1の圧縮機1と、第1の四方切替弁2と、給湯用水側熱交換器3と、第1の電動膨張弁4と、冷暖房用熱交換器5と、第2の電動膨張弁6と、第1の空気側熱交換器7と、第1の四方切替弁2と、第1の圧縮機1とを接続配管により順に接続して形成されている。   The first refrigerant circuit includes a first compressor 1, a first four-way switching valve 2, a hot water supply water-side heat exchanger 3, a first electric expansion valve 4, and an air conditioning heat exchanger 5. The second electric expansion valve 6, the first air-side heat exchanger 7, the first four-way switching valve 2, and the first compressor 1 are sequentially connected by connection piping.
第2の冷媒回路は、第2の圧縮機11と、第2の四方切替弁12と、給湯用水側熱交換器3と、第3の電動膨張弁14と、冷暖房用熱交換器5と、第4の電動膨張弁16と、第2の空気側熱交換器17と、第2の四方切替弁12と、第2の圧縮機11とを接続配管により順に接続して形成されている。   The second refrigerant circuit includes a second compressor 11, a second four-way switching valve 12, a hot water supply water side heat exchanger 3, a third electric expansion valve 14, and an air conditioning heat exchanger 5. The fourth electric expansion valve 16, the second air-side heat exchanger 17, the second four-way switching valve 12, and the second compressor 11 are sequentially connected by connection piping.
冷暖房回路は、ポンプ60と、冷暖房用熱交換器5と、冷暖房用室内熱交換器61とを含み、ポンプ60により循環される水を冷暖房用熱交換器5で冷却または加熱し、冷暖房用室内熱交換器61を通る空気を冷却または加熱し、冷房または暖房する。   The air conditioning circuit includes a pump 60, an air conditioner heat exchanger 5, and an air conditioner indoor heat exchanger 61. The air circulated by the pump 60 is cooled or heated by the air conditioner heat exchanger 5, and the air conditioner room The air passing through the heat exchanger 61 is cooled or heated, and is cooled or heated.
給湯回路は、給水を加圧する給水ポンプ50と、給水を加熱する給湯用水側熱交換器3と、貯湯タンク51と、貯湯か出湯かを切替える三方弁52と、湯と給水とを混合し出湯温度を調節する二方弁53と、出湯量を調節する二方弁54とを含んでおり、給湯用水側熱交換器3に供給された水を加熱し、貯湯タンク51に湯を蓄えるか、二方弁53からの給水により所望の出湯温度に調節して、図示しない蛇口やシャワーに出湯する。   The hot water supply circuit mixes hot water and hot water by mixing a hot water and hot water, a feed water pump 50 for pressurizing the feed water, a hot water supply side heat exchanger 3 for heating the feed water, a hot water storage tank 51, a three-way valve 52 for switching between hot water and hot water. A two-way valve 53 for adjusting the temperature and a two-way valve 54 for adjusting the amount of hot water to heat the water supplied to the hot water supply side heat exchanger 3 and store hot water in the hot water storage tank 51; The hot water temperature from the two-way valve 53 is adjusted to a desired hot water temperature, and the hot water is discharged to a faucet or a shower (not shown).
なお、水圧が十分な場合は、給水ポンプ50は不要である。また、瞬間給湯方式の場合は、貯湯タンク51および三方弁52は設置されない。   If the water pressure is sufficient, the water supply pump 50 is not necessary. In the case of the instantaneous hot water supply method, the hot water storage tank 51 and the three-way valve 52 are not installed.
図2は、実施形態1の各運転モードにおける四方切替弁,電動膨張弁(膨張弁),二方切替弁(二方弁)などの各機器の運転動作を示す図であり、図3は、実施形態1の運転モード移行時の各機器の運転動作を示す図である。   FIG. 2 is a diagram illustrating the operation of each device such as a four-way switching valve, an electric expansion valve (expansion valve), and a two-way switching valve (two-way valve) in each operation mode of the first embodiment. It is a figure which shows the driving | running operation | movement of each apparatus at the time of operation mode transfer of Embodiment 1. FIG.
運転モード番号1は、給湯・貯湯および暖房の同時運転の場合の運転動作を示している。   The operation mode number 1 indicates the operation in the case of simultaneous operation of hot water supply / hot water storage and heating.
第1の冷媒回路において、圧縮機1で圧縮された冷媒は、四方切替弁2の実線の流路を通り、給湯用水側熱交換器3に入り、放熱して給湯用の水を加熱する。二方弁21は閉じられている。   In the first refrigerant circuit, the refrigerant compressed by the compressor 1 passes through the solid line of the four-way switching valve 2 and enters the hot water supply water-side heat exchanger 3 to dissipate heat to heat the hot water supply water. The two-way valve 21 is closed.
給湯用熱交換器3を出た冷媒は、全開の膨張弁4と開かれたバルブ22を通り、冷暖房用熱交換器5に入る。冷暖房用熱交換器5においても、冷媒は放熱し、ポンプ60により循環される循環水またはブラインを加熱する。二方弁23は閉じられている。   The refrigerant that has exited the hot water supply heat exchanger 3 passes through the fully opened expansion valve 4 and the opened valve 22 and enters the heat exchanger 5 for cooling and heating. Also in the air conditioner heat exchanger 5, the refrigerant dissipates heat and heats the circulating water or brine circulated by the pump 60. The two-way valve 23 is closed.
冷暖房用熱交換器5を出た冷媒は、電動膨張弁6において減圧・膨張する。二方弁24は閉じられている。膨張した冷媒は、空気側熱交換器7において空気から吸熱し、四方切替弁2を経て圧縮機1に吸い込まれる。   The refrigerant that has left the heat exchanger 5 for air conditioning is decompressed and expanded in the electric expansion valve 6. The two-way valve 24 is closed. The expanded refrigerant absorbs heat from the air in the air-side heat exchanger 7 and is sucked into the compressor 1 through the four-way switching valve 2.
空気側熱交換器7では、ファン40が空気を熱交換器に送っている。   In the air-side heat exchanger 7, the fan 40 sends air to the heat exchanger.
第2の冷媒回路において、圧縮機11で圧縮された冷媒は、四方切替弁12の実線の流路を通り、給湯用水側熱交換器3に入り、放熱して給湯用の水を加熱する。二方弁31は閉じられている。   In the second refrigerant circuit, the refrigerant compressed by the compressor 11 passes through the solid line flow path of the four-way switching valve 12, enters the hot water supply water-side heat exchanger 3, dissipates heat, and heats the hot water supply water. The two-way valve 31 is closed.
給湯用水側熱交換器3を出た冷媒は、全開の膨張弁14と開かれたバルブ32を通り、冷暖房用熱交換器5に入る。冷暖房用熱交換器5においても冷媒は放熱し、ポンプ60により循環される循環水またはブラインを加熱する。二方弁33は閉じられている。   The refrigerant that has exited the hot water supply water-side heat exchanger 3 passes through the fully opened expansion valve 14 and the opened valve 32, and enters the heat exchanger 5 for cooling and heating. The refrigerant also dissipates heat in the air conditioner heat exchanger 5 and heats the circulating water or brine circulated by the pump 60. The two-way valve 33 is closed.
冷暖房用熱交換器5を出た冷媒は、電動膨張弁16において減圧・膨張する。二方弁34は閉じられている。膨張した冷媒は、空気側熱交換器17において空気から吸熱し、四方切替弁12を経て圧縮機11に吸い込まれる。   The refrigerant that has exited the air conditioner heat exchanger 5 is decompressed and expanded in the electric expansion valve 16. The two-way valve 34 is closed. The expanded refrigerant absorbs heat from the air in the air-side heat exchanger 17 and is sucked into the compressor 11 through the four-way switching valve 12.
空気側熱交換器7では、ファン41が空気を熱交換器に送っている。   In the air-side heat exchanger 7, the fan 41 sends air to the heat exchanger.
給湯側の水側流路では、市水等の給水が、給水ポンプ50で水側熱交換器3に送られ、給湯用水側熱交換器3で冷媒により加熱され、三方弁52を経て、二方弁53からの給水により所望の出湯温度に調節され、図示しない蛇口やシャワーに出湯される。   In the water-side flow path on the hot water supply side, water such as city water is sent to the water-side heat exchanger 3 by the water supply pump 50, heated by the refrigerant in the hot-water supply water-side heat exchanger 3, passed through the three-way valve 52, The desired hot water temperature is adjusted by supplying water from the direction valve 53, and the hot water is discharged to a faucet or a shower (not shown).
貯湯運転では、加熱された水は、三方弁52の切替えにより、貯湯タンク51に蓄えられる。   In the hot water storage operation, the heated water is stored in the hot water storage tank 51 by switching the three-way valve 52.
冷暖房側の水側流路は、ポンプ60により循環される水が冷暖房用熱交換器5で加熱され、室内熱交換器61で放熱しながら、空気を加熱する。加熱された空気は、ファン62により室内に吹き出される。   The water-side flow path on the air conditioning side heats the air while the water circulated by the pump 60 is heated by the air conditioner heat exchanger 5 and radiated by the indoor heat exchanger 61. The heated air is blown into the room by the fan 62.
三方弁63で室内熱交換器61に流れる水の流量を制御し、室温を制御する。   The three-way valve 63 controls the flow rate of water flowing to the indoor heat exchanger 61 to control the room temperature.
運転モード番号2は、給湯・貯湯と冷房運転を同時にする場合の運転動作を示している。   The operation mode number 2 indicates the operation when the hot water supply / hot water storage and the cooling operation are performed simultaneously.
第1の冷媒回路において、圧縮機1で圧縮された冷媒は、四方切替弁2の実線の流路を通り、給湯用水側熱交換器3に入り、放熱して給水された水を加熱する。二方弁21は閉じられている。   In the first refrigerant circuit, the refrigerant compressed by the compressor 1 passes through the solid line flow path of the four-way switching valve 2 and enters the hot water supply water-side heat exchanger 3 to dissipate heat and heat the supplied water. The two-way valve 21 is closed.
給湯用水側熱交換器3を出た冷媒は、膨張弁4において減圧・膨張する。二方弁22は閉じられている。膨張した冷媒は、冷暖房用熱交換器5に入り蒸発し、ポンプ60からの循環水またはブラインを冷却する。   The refrigerant exiting the hot water supply water-side heat exchanger 3 is decompressed and expanded in the expansion valve 4. The two-way valve 22 is closed. The expanded refrigerant enters the heat exchanger 5 for air conditioning, evaporates, and cools the circulating water or brine from the pump 60.
冷暖房用熱交換器5を出た冷媒は、全開の膨張弁6と開かれた二方弁24を通り、空気側熱交換器7において更に蒸発・吸熱し、四方切替弁2を経て圧縮機に吸い込まれる。   The refrigerant that has exited the heat exchanger 5 for cooling and heating passes through the fully opened expansion valve 6 and the opened two-way valve 24, further evaporates and absorbs heat in the air-side heat exchanger 7, and passes through the four-way switching valve 2 to the compressor. Inhaled.
第2の冷媒回路においても同様な動作をする。   The same operation is performed in the second refrigerant circuit.
第2の冷媒回路では、膨張弁14を絞り、二方弁32を閉じる。膨張弁16は全開とし、二方弁34は開く。   In the second refrigerant circuit, the expansion valve 14 is throttled and the two-way valve 32 is closed. The expansion valve 16 is fully opened and the two-way valve 34 is opened.
運転モード番号3は、給湯・貯湯の単独運転時の運転動作を示している。運転モード番号3においては、二方弁23,33を開き、ポンプ60とファン62を停止する。   The operation mode number 3 indicates the operation operation at the time of independent operation of hot water supply / hot water storage. In operation mode number 3, the two-way valves 23 and 33 are opened, and the pump 60 and the fan 62 are stopped.
他は運転モード番号1の給湯・貯湯と暖房運転の場合と同様である。   Others are the same as in the case of operation mode No. 1 of hot water supply / hot water storage and heating operation.
運転モード番号4は、暖房の単独運転時の運転動作を示している。運転モード番号4においては、二方弁21,31を開き、給水ポンプ50を停止する。   The operation mode number 4 indicates the operation operation at the time of independent heating operation. In the operation mode number 4, the two-way valves 21 and 31 are opened, and the water supply pump 50 is stopped.
他は運転モード番号1と同様である。   Others are the same as the operation mode number 1.
運転モード番号5は、冷房の単独運転時の運転動作を示している。   The operation mode number 5 indicates the operation operation during the single operation of the cooling.
第1の冷媒回路において、四方切替弁を図1の破線の方向に切替える。   In the first refrigerant circuit, the four-way switching valve is switched in the direction of the broken line in FIG.
圧縮機1で圧縮された冷媒は、四方切替弁2の破線の流路を通り、空気側熱交換器7で空気に放熱する。空気側熱交換器7を出た冷媒は、膨張弁6において減圧・膨張する。二方弁24は閉じられている。   The refrigerant compressed by the compressor 1 passes through the broken flow path of the four-way switching valve 2 and radiates heat to the air by the air-side heat exchanger 7. The refrigerant exiting the air side heat exchanger 7 is decompressed and expanded in the expansion valve 6. The two-way valve 24 is closed.
膨張した冷媒は、冷暖房用熱交換器5に至り、蒸発・吸熱して、循環水またはブラインを冷却する。二方弁23は閉じられている。冷暖房用熱交換器5を出た冷媒は、全開の膨張弁4と開かれた二方弁22を通り、開かれた二方弁21を通り、四方切替弁2の破線の流路を通り、圧縮機1に吸い込まれる。   The expanded refrigerant reaches the heat exchanger 5 for cooling and heating, evaporates and absorbs heat, and cools the circulating water or brine. The two-way valve 23 is closed. The refrigerant that has exited the heat exchanger 5 for cooling and heating passes through the fully-opened expansion valve 4 and the opened two-way valve 22, passes through the opened two-way valve 21, passes through the broken channel of the four-way switching valve 2, Sucked into the compressor 1.
給湯用の給水ポンプ50は停止する。   The hot water supply pump 50 stops.
第2の冷媒回路においては、四方切替弁12を破線の方向に切替え、膨張弁16を絞り、二方弁34を閉じる。二方弁33を閉じ、膨張弁14を全開にし、2方弁32は開き、二方弁31も開く。第1の冷媒回路と同様に動作する。   In the second refrigerant circuit, the four-way switching valve 12 is switched in the direction of the broken line, the expansion valve 16 is throttled, and the two-way valve 34 is closed. The two-way valve 33 is closed, the expansion valve 14 is fully opened, the two-way valve 32 is opened, and the two-way valve 31 is also opened. It operates similarly to the first refrigerant circuit.
以上の運転では、2つの冷媒回路の両方を運転するとしたが、給湯負荷や冷暖房負荷が小さい場合は、いずれか一方の冷媒回路の圧縮機を停止してもよい。そのような運転については、後に詳しく説明する。   In the above operation, both the two refrigerant circuits are operated. However, when the hot water supply load or the cooling / heating load is small, the compressor of one of the refrigerant circuits may be stopped. Such operation will be described in detail later.
冬季で湿度が比較的高い場合、空気側熱交換器7,17に霜が着くので、霜を溶かす除霜運転をする必要がある。図2の運転モード番号6から11は、除霜運転をする場合の様々な運転パターンを示している。   When the humidity is relatively high in the winter season, frost forms on the air-side heat exchangers 7 and 17, so it is necessary to perform a defrosting operation to melt the frost. The operation mode numbers 6 to 11 in FIG. 2 indicate various operation patterns when performing the defrosting operation.
運転モード番号6は、給湯・貯湯と暖房運転をしながら、同時に空気側熱交換器7に着いた霜を溶かす除霜運転をする場合を示している。   The operation mode number 6 indicates a case where a defrosting operation is performed to melt frost attached to the air-side heat exchanger 7 while simultaneously performing hot water supply / hot water storage and heating operation.
この場合、第1の冷媒回路においては、四方切替弁2を破線の方向に切替える。圧縮機1を出た冷媒は、四方切替弁2の破線の経路を通り、空気側熱交換器7に入り、放熱して熱交換器に着いた霜を溶かす。ファン40は停止しておく。   In this case, in the first refrigerant circuit, the four-way switching valve 2 is switched in the direction of the broken line. The refrigerant exiting the compressor 1 passes through the broken line path of the four-way switching valve 2, enters the air-side heat exchanger 7, dissipates heat, and melts frost attached to the heat exchanger. The fan 40 is stopped.
空気側熱交換器7を出た冷媒は、全開にされた膨張弁6および開かれた二方弁24を通り、次に開かれた二方弁23を通り、更に全開にされた膨張弁4および開かれた二方弁22,開かれた二方弁21,四方切替弁2の破線の経路を順に通り、圧縮機1に吸い込まれる。   The refrigerant that has exited the air-side heat exchanger 7 passes through the fully opened expansion valve 6 and the opened two-way valve 24, then passes through the opened two-way valve 23, and is further opened into the fully opened expansion valve 4. Then, the two-way valve 22 that is opened, the two-way valve 21 that is opened, and the four-way switching valve 2 are sequentially sucked into the compressor 1 through broken lines.
なお、着霜量が多く、除霜に長時間かかるような外気条件の場合は、二方弁21または23を閉じる。このときは、給湯能力や暖房能力は低下する。   Note that the two-way valve 21 or 23 is closed in an outside air condition where the amount of frost formation is large and defrosting takes a long time. At this time, the hot water supply capacity and the heating capacity decrease.
第2の冷媒回路の動作は、運転モード番号1の給湯・貯湯と暖房運転の場合と同様である。   The operation of the second refrigerant circuit is the same as in the case of hot water supply / storage and heating operation of operation mode number 1.
このような動作により、給湯・貯湯運転と暖房運転をしながら除霜運転ができる。   By such an operation, the defrosting operation can be performed while performing the hot water supply / hot water storage operation and the heating operation.
運転モード番号7は、給湯・貯湯と暖房運転をしながら、同時に空気側熱交換器17に着いた霜を溶かす除霜運転をする場合で、ちょうど運転モード番号6の第1の冷媒回路と第2の冷媒回路の運転を入れ替えた動作をする。   The operation mode number 7 is a case where a defrosting operation is performed to melt frost on the air-side heat exchanger 17 while performing hot water supply / hot water storage and heating operation. The operation | movement which replaced the driving | operation of 2 refrigerant circuits is carried out.
除霜が必要なとき、運転モード番号6と運転モード番号7の動作を同時にはしないようにすれば、除霜中を含めて常に給湯・貯湯運転や暖房運転が可能である。この運転については、後に詳しく説明する。   When defrosting is required, if the operation mode number 6 and the operation mode number 7 are not performed simultaneously, hot water supply / hot water storage operation and heating operation are always possible including during defrosting. This operation will be described in detail later.
運転モード番号8は、給湯・貯湯運転と空気側熱交換器7の除霜運転を同時にする場合の運転動作を示している。   The operation mode number 8 indicates the operation when the hot water supply / hot water storage operation and the defrosting operation of the air-side heat exchanger 7 are performed simultaneously.
このときは、二方弁33を開き、ポンプ60およびファン62を停止する。   At this time, the two-way valve 33 is opened and the pump 60 and the fan 62 are stopped.
他の動作は、運転モード番号6の場合と同様である。   Other operations are the same as in the case of the operation mode number 6.
運転モード番号9は、給湯・貯湯運転と空気側熱交換器17の除霜運転を同時にする場合の運転動作を示している。   The operation mode number 9 indicates an operation operation when the hot water supply / hot water storage operation and the defrosting operation of the air heat exchanger 17 are performed simultaneously.
このときは、二方弁23を開き、ポンプ60およびファン62を停止する。   At this time, the two-way valve 23 is opened and the pump 60 and the fan 62 are stopped.
他の動作は、運転モード番号7の場合と同様である。   Other operations are the same as in the case of the operation mode number 7.
運転モード番号10は、暖房の単独運転と空気側熱交換器7の除霜運転を同時にする場合の運転動作を示している。   The operation mode number 10 indicates an operation operation in the case where the heating independent operation and the air-side heat exchanger 7 defrosting operation are simultaneously performed.
このときは、二方弁21を開き、給水ポンプ50を停止する。   At this time, the two-way valve 21 is opened and the water supply pump 50 is stopped.
他の動作は、給湯・貯湯、暖房運転と除霜運転を同時にする運転モード番号6の場合と同様である。   Other operations are the same as in the case of operation mode number 6 in which hot water / hot water storage, heating operation and defrosting operation are performed simultaneously.
運転モード番号11は、暖房の単独運転と空気側熱交換器17の除霜運転を同時にする場合の運転動作を示している。   The operation mode number 11 indicates an operation operation in the case where the heating independent operation and the air-side heat exchanger 17 defrosting operation are simultaneously performed.
このときは、二方弁31を開き、給水ポンプ50を停止する。
他の動作は、給湯・貯湯、暖房運転と除霜運転を同時にする運転モード番号7の場合と同様である。
At this time, the two-way valve 31 is opened and the water supply pump 50 is stopped.
Other operations are the same as in the case of operation mode number 7 in which hot water / hot water storage, heating operation and defrosting operation are performed simultaneously.
運転モード番号12は、給湯運転と冷暖房運転すべてを停止したときに、空気側熱交換器7に霜が残っている場合にする除霜運転の運転動作を示している。   The operation mode number 12 indicates the operation operation of the defrosting operation performed when frost remains in the air-side heat exchanger 7 when all of the hot water supply operation and the air conditioning operation are stopped.
運転モード番号13は、空気側熱交換器17に霜が残っている場合にする除霜運転の運転動作を示している。   The operation mode number 13 indicates the operation operation of the defrosting operation performed when frost remains in the air-side heat exchanger 17.
これらは、運転モード番号8,9で一方の圧縮機を停止した場合の動作になっている。   These are the operations when one of the compressors is stopped in operation mode numbers 8 and 9.
運転モード番号12と13とは、同時に運転してもよい。   The operation mode numbers 12 and 13 may be operated simultaneously.
運転モード番号14,15は、やや特殊な条件であり、室内に多くの発熱源があって、冬季でも室内の冷房負荷が大きく、冷房運転をしており、同時に給湯運転で着霜した場合の運転動作を示している。実施形態1では、このような運転も可能である。   The operation mode numbers 14 and 15 are somewhat special conditions, in which there are many heat sources in the room, the indoor cooling load is large even in winter, the cooling operation is performed, and at the same time the frost is formed in the hot water supply operation Indicates driving behavior. In the first embodiment, such an operation is also possible.
運転モード番号16,17は、運転モード番号14,15と同様な条件で、給湯機を停止したときに、空気側熱交換器7または空気側熱交換器17に霜が残っていて、冷房運転は続ける場合の運転動作を示している。   The operation mode numbers 16 and 17 have the same conditions as the operation mode numbers 14 and 15, and when the water heater is stopped, frost remains in the air-side heat exchanger 7 or the air-side heat exchanger 17, and the cooling operation is performed. Indicates the driving operation when continuing.
運転モード番号16では、二方弁31を開き、給水ポンプ50を停止する以外は、運転モード番号14と同じ動作である。   The operation mode number 16 is the same as the operation mode number 14 except that the two-way valve 31 is opened and the feed water pump 50 is stopped.
運転モード番号17では、二方弁21を開き、給水ポンプ50を停止する以外は、運転モード番号15と同じ動作である。   Operation mode number 17 is the same operation as operation mode number 15 except that two-way valve 21 is opened and feed water pump 50 is stopped.
実施形態1のこのような系統構成および運転モードによれば、2つの冷媒回路を独立に運転できるので、一方の冷媒回路で除霜運転をしているときでも、他方の冷媒回路により給湯運転や冷暖房運転を継続できる。   According to such a system configuration and operation mode of the first embodiment, since the two refrigerant circuits can be operated independently, even when the defrosting operation is performed in one refrigerant circuit, the hot water supply operation or the Air conditioning operation can be continued.
図4は、実施形態1における除霜運転の制御シーケンスを示す図である。   FIG. 4 is a diagram illustrating a control sequence of the defrosting operation according to the first embodiment.
図4において運転モード番号1,3,4となっている部分は、図2における運転モード番号1,3,4のいずれかの運転をすることを意味する。   In FIG. 4, the portions having operation mode numbers 1, 3, and 4 mean that any one of operation mode numbers 1, 3, and 4 in FIG. 2 is operated.
先に述べたように、除霜運転をする必要がある場合、2つの冷媒回路で同時に除霜運転をしないように制御すると、除霜運転中に給湯や暖房の能力が低下しまたは停止することを完全に回避できる。   As described above, when it is necessary to perform a defrosting operation, if the two refrigerant circuits are controlled so as not to perform the defrosting operation at the same time, the hot water supply and heating capabilities are reduced or stopped during the defrosting operation. Can be completely avoided.
図5は、実施形態1における冷房単独運転と給湯・貯湯および冷房の同時運転との切替えの制御シーケンスを示す図である。   FIG. 5 is a diagram showing a control sequence for switching between the cooling only operation and the simultaneous operation of hot water supply / hot water storage and cooling in the first embodiment.
冷房単独運転と給湯・貯湯および冷房の同時運転とを切替える場合、四方切替弁2,12を切替える必要がある。このときは、冷房運転が停止するので、室内温度が上昇して不快になることが考えられる。   When switching between the cooling only operation and the simultaneous operation of hot water supply / hot water storage and cooling, it is necessary to switch the four-way switching valves 2 and 12. At this time, since the cooling operation is stopped, the room temperature may rise and become uncomfortable.
この不快さを防止するために、2つの四方切替弁を同時には切替えず、順次切替え、冷房運転を継続する。   In order to prevent this discomfort, the two four-way switching valves are not switched at the same time, but are sequentially switched and the cooling operation is continued.
ここで、冷房単独運転(運転モード番号5)から、給湯・貯湯および冷房の同時運転(運転モード番号2)に移行するときには、図3の運転モード番号2Aの運転をし、給湯・貯湯と冷房の同時運転(運転モード番号2)から冷房単独運転(運転モード番号5)に移行するときには、図3の運転モード番号2Bの運転をして、冷房運転の連続性を保っている。   Here, when shifting from the cooling only operation (operation mode number 5) to the simultaneous operation of hot water supply / storage and cooling (operation mode number 2), the operation of operation mode number 2A in FIG. When shifting from the simultaneous operation (operation mode number 2) to the cooling only operation (operation mode number 5), the operation of the operation mode number 2B in FIG. 3 is performed to maintain the continuity of the cooling operation.
図6は、実施形態1における低負荷時の暖房運転の制御シーケンスを示す図である。   FIG. 6 is a diagram illustrating a control sequence of the heating operation at the time of low load in the first embodiment.
暖房単独運転において、暖房負荷が小さいときには、一方の冷媒回路のみの運転をしてもよい。   In the heating single operation, when the heating load is small, only one refrigerant circuit may be operated.
一方の冷媒回路による暖房単独運転は、図3の運転モード番号4Aの運転をする。給湯・貯湯運転をするときには、両方の冷媒回路を給湯同時運転(図2の運転モード番号1)に切替える。   In the heating-only operation by one refrigerant circuit, the operation of the operation mode number 4A in FIG. 3 is performed. When performing hot water supply / hot water storage operation, both refrigerant circuits are switched to simultaneous hot water supply operation (operation mode number 1 in FIG. 2).
給湯・貯湯運転が終わったら、前に暖房単独運転をしていた方の冷媒回路(図6では第1の冷媒回路)を必要に応じて除霜運転に切替え(図1の運転モード番号6)、除霜運転をしてから停止する。   When the hot water supply / hot water storage operation is completed, the refrigerant circuit (the first refrigerant circuit in FIG. 6) that has been previously operated alone is switched to the defrosting operation as necessary (operation mode number 6 in FIG. 1). Stop after defrosting operation.
もう一方の冷媒回路は暖房に切替える(図3の運転モード番号4B)。   The other refrigerant circuit is switched to heating (operation mode number 4B in FIG. 3).
除霜運転をするときは、まず、停止していた冷媒回路で暖房運転を立ち上げ(図1の運転モード番号4)、もう一方の冷媒回路を除霜運転に切替え(図1の運転モード番号7)、除霜運転をしてから停止する(図3の運転モード番号4A)。   When performing the defrosting operation, first, the heating operation is started with the stopped refrigerant circuit (operation mode number 4 in FIG. 1), and the other refrigerant circuit is switched to the defrosting operation (operation mode number in FIG. 1). 7) After defrosting operation, stop (operation mode number 4A in FIG. 3).
図7は、実施形態1における低負荷時の冷房運転の制御シーケンスを示す図である。   FIG. 7 is a diagram illustrating a control sequence of the cooling operation at the time of low load in the first embodiment.
同様に、冷房単独運転においても、冷房負荷が小さいときには一方の冷媒回路だけを運転してもよい。一方の冷媒回路による冷房単独運転は、図3の運転モード番号5Aの運転をする。   Similarly, in the cooling only operation, only one refrigerant circuit may be operated when the cooling load is small. In the cooling only operation by one refrigerant circuit, the operation of the operation mode number 5A in FIG. 3 is performed.
給湯・貯湯運転をするときには、もう一方の冷媒回路で給湯運転を始め(図3の運転モード番号2B)、次に冷房していた冷媒回路を給湯・貯湯および冷房の同時運転に切替える(図1の運転モード番号2)。   When the hot water supply / hot water storage operation is performed, the hot water supply operation is started in the other refrigerant circuit (operation mode number 2B in FIG. 3), and then the cooled refrigerant circuit is switched to the simultaneous operation of hot water supply / hot water storage and cooling (FIG. 1). Operation mode number 2).
給湯・貯湯運転が終わったら、前に停止していた冷媒回路(図7では第2の冷媒回路)で冷房運転を開始し(図3の運転モード番号2A)、次にもう一方の冷媒回路を停止する(図3の運転モード番号5B)。   When the hot water supply / hot water storage operation is completed, the cooling operation is started with the refrigerant circuit (second refrigerant circuit in FIG. 7) that has been stopped before (operation mode number 2A in FIG. 3), and then the other refrigerant circuit is connected. Stop (operation mode number 5B in FIG. 3).
給湯・貯湯および冷房の同時運転を再開する場合にも、停止していた冷媒回路で給湯・冷房同時運転を開始し(図3の運転モード番号2A)、次にもう一方の冷媒回路を給湯・貯湯および冷房の同時運転に切替える(図1の運転モード番号2)。   When restarting the simultaneous operation of hot water supply / storage and cooling, the hot water supply / cooling simultaneous operation is started with the stopped refrigerant circuit (operation mode number 2A in FIG. 3), and then the other refrigerant circuit is supplied with hot water / Switch to simultaneous operation of hot water storage and cooling (operation mode number 2 in FIG. 1).
給湯運転は、断続的にされることが多いので、冷媒回路の変動により、冷暖房の能力が不安定になることがある。この不安定を避けるため、圧縮機回転速度をインバータによって可変にしておき、給湯・貯湯運転がされるときには、圧縮機の回転速度を上げて、冷暖房能力を確保するように制御する。   Since the hot water supply operation is often performed intermittently, the air conditioning capability may become unstable due to the fluctuation of the refrigerant circuit. In order to avoid this instability, the compressor rotation speed is made variable by an inverter, and when hot water supply / hot water storage operation is performed, control is performed to increase the rotation speed of the compressor to ensure air conditioning capability.
二方弁23と33を開度の調節できる弁にして、冷暖房用水側熱交換器5を通る冷媒流量を制御すると、三方弁63による制御と合わせて、給湯負荷の変動に対して更に安定した室温の制御が可能である。   When the two-way valves 23 and 33 are valves whose opening degree can be adjusted and the flow rate of refrigerant passing through the water-side heat exchanger 5 for cooling and heating is controlled, in addition to the control by the three-way valve 63, it is further stable against fluctuations in the hot water supply load. The room temperature can be controlled.
なお、膨張弁4,6,14,16については、全開にすることが可能で全開時の流路抵抗の小さい膨張弁を用いれば、膨張弁と並列に付けられている二方弁22,24,32,34は設けなくてもよい。   Note that the expansion valves 4, 6, 14, and 16 can be fully opened, and if an expansion valve having a small flow resistance at the time of full opening is used, the two-way valves 22 and 24 attached in parallel with the expansion valve. , 32, 34 may not be provided.
図8は、実施形態1における給湯用水側熱交換器の構造の一例を示す図である。   FIG. 8 is a diagram illustrating an example of a structure of the hot water supply water-side heat exchanger in the first embodiment.
給湯用水側熱交換器3の形態としては、例えば銅の伝熱管90〜93をらせん状に巻いた熱交換器を用いる。伝熱管90には第1の冷媒回路の冷媒を流し、伝熱管92には第2の冷媒回路の冷媒を流し、伝熱管91,93には水を流す。   As a form of the hot water supply water-side heat exchanger 3, for example, a heat exchanger in which copper heat transfer tubes 90 to 93 are spirally wound is used. The refrigerant of the first refrigerant circuit is caused to flow through the heat transfer tube 90, the refrigerant of the second refrigerant circuit is caused to flow through the heat transfer tube 92, and water is caused to flow through the heat transfer tubes 91 and 93.
図9は、実施形態1における給湯用水側熱交換器の構造の他の例を示す図である。図8の熱交換器の代わりに、図9の熱交換器を2個用いてもよい。   FIG. 9 is a diagram illustrating another example of the structure of the hot water supply water-side heat exchanger in the first embodiment. Instead of the heat exchanger of FIG. 8, two heat exchangers of FIG. 9 may be used.
また、給湯用水側熱交換器3を図1の貯湯タンク51に巻きつけるように配置してもよい。   Moreover, you may arrange | position so that the hot water supply side heat exchanger 3 may be wound around the hot water storage tank 51 of FIG.
実施形態1では、室内熱交換器61は1台としたが、複数接続していくつかの部屋を空調してもよい。   In the first embodiment, the number of indoor heat exchangers 61 is one, but a plurality of indoor heat exchangers 61 may be connected to air-condition several rooms.
実施形態1によれば、給湯・貯湯運転および冷暖房運転をしながら、それらの運転を停止しないで、除霜運転ができるので、給湯の途中で湯が出なくなったり冷暖房が止まったりして、不快になることを防止できる。   According to the first embodiment, since the defrosting operation can be performed without stopping the hot water supply / storage operation and the cooling / heating operation, hot water does not come out in the middle of the hot water supply or the cooling / heating is stopped. Can be prevented.
また、大きな貯湯タンクを設ける必要がなくなるので、貯湯タンクを小型化できるとともに、貯湯タンクからの放熱ロスも低減でき、省エネルギーである。   In addition, since it is not necessary to provide a large hot water storage tank, the hot water storage tank can be reduced in size, and heat radiation loss from the hot water storage tank can be reduced, thereby saving energy.
さらに、実施形態1によれば、2つの冷媒回路を持っているので、負荷に応じた運転をして、省エネルギー運転が可能である。   Furthermore, according to Embodiment 1, since it has two refrigerant circuits, it can drive | operate according to load and an energy-saving driving | operation is possible.
≪実施形態2≫
図10は、本発明によるヒートポンプ式給湯機の実施形態2の系統構成を示す回路図である。
<< Embodiment 2 >>
FIG. 10 is a circuit diagram showing a system configuration of Embodiment 2 of the heat pump type hot water heater according to the present invention.
実施形態2は、実施形態1に、床暖房用熱交換器71と温水を循環させるポンプ72と床暖房73とを追加した構成である。   The second embodiment is a configuration in which a floor heating heat exchanger 71, a pump 72 for circulating hot water, and a floor heating 73 are added to the first embodiment.
床暖房の能力を制御するために、膨張弁75を設け、床暖房をしないときに閉じる二方弁74も設置してある。床暖房をする場合、二方弁74を開き、膨張弁75を適度な開度に制御する。   In order to control the capacity of floor heating, an expansion valve 75 is provided, and a two-way valve 74 that closes when floor heating is not performed is also provided. In the case of floor heating, the two-way valve 74 is opened and the expansion valve 75 is controlled to an appropriate opening degree.
床暖房73の代わりに、天井輻射パネルを設けてもよい。   Instead of the floor heating 73, a ceiling radiation panel may be provided.
実施形態2によれば、給湯および冷暖房運転の他に、床暖房も可能となる。   According to the second embodiment, floor heating is possible in addition to hot water supply and air conditioning operation.
なお、実施形態1または実施形態2において、室内熱交換器61を床暖房や天井輻射冷暖房にしてもよい。そのときには、ファン62は不要である。   In Embodiment 1 or Embodiment 2, the indoor heat exchanger 61 may be floor heating or ceiling radiant cooling / heating. At that time, the fan 62 is unnecessary.
実施形態2によれば、給湯および冷暖房の他に、床暖房も同時に運転可能であるから、より快適に空調できる。   According to the second embodiment, in addition to hot water supply and air conditioning, floor heating can be operated simultaneously, so that air conditioning can be performed more comfortably.
≪実施形態3≫
図11は、本発明によるヒートポンプ式給湯機の実施形態3の系統構成を示す回路図である。
<< Embodiment 3 >>
FIG. 11: is a circuit diagram which shows the system | strain structure of Embodiment 3 of the heat pump type water heater by this invention.
実施形態3は、実施形態1における第1の冷媒回路から、四方切替弁2,電動膨張弁4,二方弁22を取り除いた構成である。   In the third embodiment, the four-way switching valve 2, the electric expansion valve 4, and the two-way valve 22 are removed from the first refrigerant circuit in the first embodiment.
この簡素化された構成においても、給湯・貯湯および冷暖房の同時運転が可能であり、給湯・貯湯および除霜の同時運転もできる。   Even in this simplified configuration, hot water supply / hot water storage and air conditioning can be operated simultaneously, and hot water supply / hot water storage and defrosting can be performed simultaneously.
ただし、この構成では、第2の空気側熱交換器17の除霜運転と暖房運転とを同時にすることはできないので、そのときは暖房を停止する必要がある。   However, in this configuration, the defrosting operation and the heating operation of the second air-side heat exchanger 17 cannot be performed at the same time, and at that time, it is necessary to stop the heating.
なお、第1の空気側熱交換器7の除霜運転をするときは、二方弁25を開いて第1の圧縮機1の熱を空気側熱交換器7に直接与える。   In addition, when performing the defrost operation of the 1st air side heat exchanger 7, the two-way valve 25 is opened and the heat of the 1st compressor 1 is given to the air side heat exchanger 7 directly.
実施形態3によれば、給湯・貯湯および冷暖房の同時運転、給湯・貯湯および除霜の同時運転という機能を損なわずに、冷媒回路構成を簡素化し、小型化,低価格化できる。   According to the third embodiment, the refrigerant circuit configuration can be simplified, downsized, and reduced in price without impairing the functions of simultaneous operation of hot water supply / hot water storage and cooling / heating, and simultaneous operation of hot water supply / hot water storage and defrosting.
≪実施形態4≫
図12は、本発明によるヒートポンプ式給湯機の実施形態4の系統構成を示す回路図である。
<< Embodiment 4 >>
FIG. 12 is a circuit diagram showing a system configuration of Embodiment 4 of the heat pump type water heater according to the present invention.
実施形態4は、実施形態3に、床暖房用熱交換器71と温水を循環させるポンプ72と床暖房73とを追加した構成である。   In the fourth embodiment, a floor heating heat exchanger 71, a pump 72 for circulating hot water, and a floor heating 73 are added to the third embodiment.
床暖房の能力を制御するために、膨張弁75を設け、床暖房をしないときに閉じる二方弁74も設置してある。   In order to control the capacity of floor heating, an expansion valve 75 is provided, and a two-way valve 74 that closes when floor heating is not performed is also provided.
床暖房をする場合、二方弁74を開き、膨張弁75を適度な開度に制御する。   In the case of floor heating, the two-way valve 74 is opened and the expansion valve 75 is controlled to an appropriate opening degree.
床暖房73の代わりに、天井輻射パネルを設けてもよい。   Instead of the floor heating 73, a ceiling radiation panel may be provided.
実施形態4によれば、給湯および冷暖房運転の他に、床暖房も可能となる。   According to the fourth embodiment, floor heating is possible in addition to hot water supply and air conditioning operation.
なお、実施形態3または実施形態4において、室内熱交換器61を床暖房や天井輻射冷暖房にしてもよい。そのときには、ファン62は不要である。   In the third or fourth embodiment, the indoor heat exchanger 61 may be floor heating or ceiling radiant cooling / heating. At that time, the fan 62 is unnecessary.
実施形態4によれば、給湯および冷暖房の他に、床暖房も同時に運転可能であるから、より快適に空調できる。   According to the fourth embodiment, since floor heating can be simultaneously operated in addition to hot water supply and air conditioning, air conditioning can be performed more comfortably.
本発明によるヒートポンプ式給湯機の実施形態1の系統構成を示す回路図である。It is a circuit diagram which shows the system | strain structure of Embodiment 1 of the heat pump type water heater by this invention. 実施形態1の各運転モードにおける各機器の運転動作を示す図である。It is a figure which shows the driving | operation operation | movement of each apparatus in each operation mode of Embodiment 1. FIG. 実施形態1の運転モード移行時の各機器の運転動作を示す図である。It is a figure which shows the driving | running operation | movement of each apparatus at the time of operation mode transfer of Embodiment 1. FIG. 実施形態1における除霜運転の制御シーケンスを示す図である。It is a figure which shows the control sequence of the defrost driving | operation in Embodiment 1. FIG. 実施形態1における冷房単独運転と給湯・貯湯および冷房の同時運転との切替えの制御シーケンスを示す図である。FIG. 3 is a diagram illustrating a control sequence for switching between a cooling only operation and simultaneous operation of hot water supply / hot water storage and cooling in the first embodiment. 実施形態1における低負荷時の暖房運転の制御シーケンスを示す図である。It is a figure which shows the control sequence of the heating operation at the time of the low load in Embodiment 1. FIG. 実施形態1における低負荷時の冷房運転の制御シーケンスを示す図である。It is a figure which shows the control sequence of the cooling operation at the time of the low load in Embodiment 1. FIG. 実施形態1における給湯用水側熱交換器の構造の一例を示す図である。It is a figure which shows an example of the structure of the hot water supply water side heat exchanger in Embodiment 1. FIG. 実施形態1における給湯用水側熱交換器の構造の他の例を示す図である。It is a figure which shows the other example of the structure of the hot water supply side heat exchanger in Embodiment 1. FIG. 本発明によるヒートポンプ式給湯機の実施形態2の系統構成を示す回路図である。It is a circuit diagram which shows the system | strain structure of Embodiment 2 of the heat pump type water heater by this invention. 本発明によるヒートポンプ式給湯機の実施形態3の系統構成を示す回路図である。It is a circuit diagram which shows the system | strain structure of Embodiment 3 of the heat pump type water heater by this invention. 本発明によるヒートポンプ式給湯機の実施形態4の系統構成を示す回路図である。It is a circuit diagram which shows the system | strain structure of Embodiment 4 of the heat pump type water heater by this invention.
符号の説明Explanation of symbols
1 第1の圧縮機
2 第1の四方切替弁
3 給湯用水側熱交換器
4 第1の電動膨張弁
5 冷暖房用熱交換器
6 第1の電動膨張弁
7 第1の空気側熱交換器
11 第2の圧縮機
12 第2の四方切替弁
14 第3の電動膨張弁
16 第4の電動膨張弁
17 第2の空気側熱交換器
22〜24 二方弁
31〜34 二方弁
40 ファン
41 ファン
50 給水ポンプ
51 貯湯タンク
52 三方弁
53 出湯温度調節用二方弁
54 二方弁
60 ポンプ
61 冷暖房用室内熱交換器
62 ファン
63 三方弁
71 床暖房用熱交換器
72 ポンプ
73 床暖房
74 二方弁
75 電動膨張弁
90 冷媒側伝熱管
91 水側伝熱管
92 冷媒側伝熱管
93 水側伝熱管
DESCRIPTION OF SYMBOLS 1 1st compressor 2 1st four-way switching valve 3 Water side heat exchanger for hot water supply 4 1st electric expansion valve 5 Heat exchanger for air conditioning 6 First electric expansion valve 7 1st air side heat exchanger 11 Second compressor 12 Second four-way switching valve 14 Third electric expansion valve 16 Fourth electric expansion valve 17 Second air-side heat exchangers 22 to 24 Two-way valves 31 to 34 Two-way valves 40 Fans 41 Fan 50 Water supply pump 51 Hot water storage tank 52 Three-way valve 53 Two-way valve 54 for adjusting hot water temperature Two-way valve 60 Pump 61 Indoor heat exchanger 62 for cooling and heating Fan 63 Three-way valve 71 Heat exchanger 72 for floor heating 72 Pump 73 Floor heating 74 Two Directional valve 75 Electric expansion valve 90 Refrigerant side heat transfer tube 91 Water side heat transfer tube 92 Refrigerant side heat transfer tube 93 Water side heat transfer tube

Claims (8)

  1. 第1の圧縮機,第1の四方切替弁,給湯用水側熱交換器,第1の電動膨張弁,冷暖房用熱交換器,第2の電動膨張弁,第1の空気側熱交換器,前記第1の四方切替弁,前記第1の圧縮機の順に接続した第1の冷媒回路と、
    第2の圧縮機,第2の四方切替弁,前記給湯用水側熱交換器,第3の電動膨張弁,前記冷暖房用熱交換器,第4の電動膨張弁,第2の空気側熱交換器,前記第2の四方切替弁,前記第2の圧縮機の順に接続した第2の冷媒回路と、
    循環水を加圧するポンプ,前記冷暖房用熱交換器,冷暖房用室内熱交換器を含む冷暖房回路と、
    前記給湯用水側熱交換器に給水する経路,前記給湯用水側熱交換器で加熱された湯と給水とを混合し出湯温度を調節する二方弁を含む給湯回路と
    からなるヒートポンプ式給湯機。
    A first compressor, a first four-way switching valve, a hot water supply water side heat exchanger, a first electric expansion valve, an air conditioning heat exchanger, a second electric expansion valve, a first air side heat exchanger, A first refrigerant circuit connected in the order of the first four-way switching valve and the first compressor;
    A second compressor, a second four-way switching valve, the hot water supply water-side heat exchanger, a third electric expansion valve, the cooling / heating heat exchanger, a fourth electric expansion valve, and a second air-side heat exchanger A second refrigerant circuit connected in the order of the second four-way switching valve and the second compressor;
    An air conditioning circuit including a pump for pressurizing circulating water, the air conditioner heat exchanger, an air conditioner indoor heat exchanger;
    A heat pump type hot water heater comprising a path for supplying water to the hot water supply side heat exchanger, and a hot water supply circuit including a two-way valve that mixes hot water heated by the hot water supply side heat exchanger and the supply water to adjust a hot water temperature.
  2. 請求項1に記載のヒートポンプ式給湯機において、
    前記給湯用水側熱交換器と並列に床暖房用または天井輻射暖房用の水冷媒熱交換器を設置した
    ことを特徴とするヒートポンプ式給湯機。
    In the heat pump type water heater according to claim 1,
    A heat pump type hot water heater, wherein a water refrigerant heat exchanger for floor heating or ceiling radiation heating is installed in parallel with the hot water supply water side heat exchanger.
  3. 第1の圧縮機,給湯用水側熱交換器,第1の電動膨張弁,第1の空気側熱交換器,前記第1の圧縮機の順に接続した第1の冷媒回路と、
    第2の圧縮機,四方切替弁,前記給湯用水側熱交換器,第3の電動膨張弁,冷暖房用熱交換器,第4の電動膨張弁,第2の空気側熱交換器,前記四方切替弁,前記第2の圧縮機の順に接続した第2の冷媒回路と、
    循環水を加圧するポンプ,前記冷暖房用熱交換器,冷暖房用室内熱交換器を含む冷暖房回路と、
    前記給湯用水側熱交換器に給水する経路,前記給湯用水側熱交換器で加熱された湯と給水とを混合し出湯温度を調節する二方弁を含む給湯回路と
    からなるヒートポンプ式給湯機。
    A first refrigerant circuit connected in the order of a first compressor, a hot water supply water side heat exchanger, a first electric expansion valve, a first air side heat exchanger, and the first compressor;
    A second compressor, a four-way switching valve, the hot water supply water-side heat exchanger, a third electric expansion valve, a heating / cooling heat exchanger, a fourth electric expansion valve, a second air-side heat exchanger, and the four-way switching A second refrigerant circuit connected in the order of a valve and the second compressor;
    An air conditioning circuit including a pump for pressurizing circulating water, the air conditioner heat exchanger, an air conditioner indoor heat exchanger;
    A heat pump type hot water heater comprising a path for supplying water to the hot water supply side heat exchanger, and a hot water supply circuit including a two-way valve that mixes hot water heated by the hot water supply side heat exchanger and the supply water to adjust a hot water temperature.
  4. 請求項3に記載のヒートポンプ式給湯機において、
    前記給湯用水側熱交換器と並列に床暖房用または天井輻射暖房用の水冷媒熱交換器を設置した
    ことを特徴とするヒートポンプ式給湯機。
    In the heat pump type water heater according to claim 3,
    A heat pump type hot water heater, wherein a water refrigerant heat exchanger for floor heating or ceiling radiation heating is installed in parallel with the hot water supply water side heat exchanger.
  5. 請求項1ないし4のいずれか一項に記載のヒートポンプ式給湯機において、
    前記給湯回路が、前記給湯用水側熱交換器で加熱された湯の出湯と貯湯とを切替える三方弁と、貯湯タンクとを含む
    ことを特徴とするヒートポンプ式給湯機。
    In the heat pump type water heater according to any one of claims 1 to 4,
    The heat pump type hot water supply apparatus, wherein the hot water supply circuit includes a three-way valve that switches between hot water discharged from the hot water supply water-side heat exchanger and hot water storage, and a hot water storage tank.
  6. 請求項1または2に記載のヒートポンプ式給湯機の運転方法において、
    冷房単独運転から給湯および冷房の同時運転に切替える際に、前記第1の四方切替弁と前記第2の四方切替弁とを順次切替える
    ことを特徴とするヒートポンプ式給湯機の運転方法。
    In the operation method of the heat pump type water heater according to claim 1 or 2,
    An operation method of a heat pump type hot water heater, wherein the first four-way switching valve and the second four-way switching valve are sequentially switched when switching from a single cooling operation to a simultaneous hot water supply and cooling operation.
  7. 請求項1ないし5のいずれか一項に記載のヒートポンプ式給湯機の運転方法において、
    前記空気側熱交換器に着いた霜を溶かす除霜運転は、前記第1の冷媒回路および前記第2の冷媒回路の片方ずつ実行する
    ことを特徴とするヒートポンプ式給湯機の運転方法。
    In the operating method of the heat pump type water heater according to any one of claims 1 to 5,
    The operation method of a heat pump type hot water heater, wherein the defrosting operation for melting frost attached to the air side heat exchanger is executed for each of the first refrigerant circuit and the second refrigerant circuit.
  8. 請求項1ないし5のいずれか一項に記載のヒートポンプ式給湯機の運転方法において、
    冷暖房負荷に応じて、前記第1の冷媒回路と前記第2の冷媒回路のうちの一方のみを運転し、運転中の冷媒回路を除霜運転をする場合は、待機中の冷媒回路の運転を開始してから除霜運転をする
    ことを特徴とするヒートポンプ式給湯機の運転方法。
    In the operating method of the heat pump type water heater according to any one of claims 1 to 5,
    When only one of the first refrigerant circuit and the second refrigerant circuit is operated according to the heating / cooling load and the operating refrigerant circuit is defrosted, the standby refrigerant circuit is operated. A method for operating a heat pump type hot water heater, wherein the defrosting operation is performed after the start.
JP2003419632A 2003-12-17 2003-12-17 Heat pump type water heater and its operating method Expired - Fee Related JP4088790B2 (en)

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JP3966889B2 (en) * 2005-12-28 2007-08-29 シャープ株式会社 Heat pump water heater
JP4785630B2 (en) * 2006-06-12 2011-10-05 シャープ株式会社 Heat pump water heater
JP4995132B2 (en) * 2008-03-31 2012-08-08 シャープ株式会社 Heat pump hot water heater
JP5414638B2 (en) * 2010-08-25 2014-02-12 日立アプライアンス株式会社 Air conditioning system
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