JP2980022B2 - Heat pump water heater - Google Patents
Heat pump water heaterInfo
- Publication number
- JP2980022B2 JP2980022B2 JP6291496A JP6291496A JP2980022B2 JP 2980022 B2 JP2980022 B2 JP 2980022B2 JP 6291496 A JP6291496 A JP 6291496A JP 6291496 A JP6291496 A JP 6291496A JP 2980022 B2 JP2980022 B2 JP 2980022B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- heat exchanger
- valve
- storage tank
- water supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、蓄冷機能を有す
るヒートポンプ給湯機に関する。The present invention relates to a heat pump water heater having a cool storage function.
【０００２】[0002]
【従来の技術】従来より、給湯機能を有するヒートポン
プ給湯機がある。このヒートポンプ給湯機は、図７に示
すように、圧縮機１,四路切換弁２,室外熱交換器３,電
動膨張弁４および電動弁５,６を有する室外ユニットＸ
と、室内熱交換器７を有する室内ユニットＹと、給湯熱
交換器８を有する給湯ユニットＺとを備えている。2. Description of the Related Art There has been a heat pump water heater having a hot water supply function. As shown in FIG. 7, this heat pump water heater has an outdoor unit X having a compressor 1, a four-way switching valve 2, an outdoor heat exchanger 3, an electric expansion valve 4, and electric valves 5, 6.
And an indoor unit Y having an indoor heat exchanger 7 and a hot water supply unit Z having a hot water supply heat exchanger 8.
【０００３】上記構成のヒートポンプ給湯機において
は、冷暖房時には、電動弁５および電磁弁１０を閉鎖す
る一方、電磁弁９を開放する。そして、冷房時には、四
路切換弁２を室外熱交換器３側に切り換えて、室外熱交
換器３を凝縮器とする一方、室内熱交換器７を蒸発器と
して使用する。また、暖房時には、四路切換弁２を室内
熱交換器７側に切り換えて、室内熱交換器７を凝縮器と
する一方、室外熱交換器３を蒸発器として使用する。In the heat pump water heater having the above configuration, the electric valve 5 and the solenoid valve 10 are closed while the solenoid valve 9 is opened during cooling and heating. During cooling, the four-way switching valve 2 is switched to the outdoor heat exchanger 3 to use the outdoor heat exchanger 3 as a condenser and use the indoor heat exchanger 7 as an evaporator. Further, at the time of heating, the four-way switching valve 2 is switched to the indoor heat exchanger 7 to use the indoor heat exchanger 7 as a condenser and use the outdoor heat exchanger 3 as an evaporator.
【０００４】さらに、給湯時には、四路切換弁２を室外
熱交換器３側に切り換えて、電磁弁９を閉鎖する一方、
電動弁５および電磁弁１０を開放する。こうして、給湯
熱交換器８を凝縮器とする一方、室外熱交換器３を蒸発
器として使用して、給湯熱交換器８と給湯槽(図示せず)
内の水との熱交換によって上記給湯槽内の水に蓄熱する
のである。Further, at the time of hot water supply, the four-way switching valve 2 is switched to the outdoor heat exchanger 3 to close the solenoid valve 9,
The electric valve 5 and the solenoid valve 10 are opened. Thus, while using the hot water supply heat exchanger 8 as a condenser, the outdoor heat exchanger 3 is used as an evaporator, and the hot water supply heat exchanger 8 and a hot water supply tank (not shown) are used.
Heat is stored in the water in the hot water tank by heat exchange with the water in the water.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来のヒートポンプ給湯機においては、給湯接続ポート１
１,１２を介して電動膨張弁４と圧縮機１の吐出口との
間に接続されている給湯熱交換器８は、凝縮器としてし
か使用できない。したがって、給湯熱交換器８を蒸発器
として使用して、給湯槽内の水に蓄冷することは不可能
なのである。However, in the above-described conventional heat pump water heater, the hot water supply connection port 1 is provided.
The hot water supply heat exchanger 8 connected between the electric expansion valve 4 and the discharge port of the compressor 1 via the first and second 12 can be used only as a condenser. Therefore, it is impossible to use the hot water supply heat exchanger 8 as an evaporator to store cold water in the water in the hot water supply tank.
【０００６】そこで、この発明の目的は、給湯熱交換器
を蒸発器として使用できる蓄冷機能を有するヒートポン
プ給湯機を提供することにある。Accordingly, an object of the present invention is to provide a heat pump water heater having a regenerative function that can use a hot water supply heat exchanger as an evaporator.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、請求項１に係る発明は、圧縮機・四路切換弁・室外熱
交換器・減圧手段・室内熱交換器および給湯熱交換器を有
すると共に,第１電磁弁が介接されて上記圧縮機の吐出
口と給湯熱交換器とを連結する第１冷媒管を有して,上
記室外熱交換器を凝縮器として機能させる一方上記室内
熱交換器を蒸発器として機能させて行う冷房運転と,上
記室内熱交換器を凝縮器として機能させる一方上記室外
熱交換器を蒸発器として機能させて行う暖房運転と,上
記給湯熱交換器を凝縮器として機能させる一方上記室外
熱交換器を蒸発器として機能させて行う給湯運転とを,
選択可能になっているヒートポンプ給湯機において、第
２電磁弁が介接されると共に,上記第１冷媒管における
上記第１電磁弁の下流側と上記圧縮機の吸入口とを連結
する第２冷媒管と、ポンプおよび第１三方弁が介設され
ると共に,上記給湯熱交換器の給液口と貯湯タンクの底
部とを接続する第１給液配管と、第２三方弁が介設され
ると共に,上記給湯熱交換器の戻り液口と上記貯湯タン
クの深さ方向第１中央部とを接続する第１戻り液配管
と、上記第１三方弁と上記貯湯タンクの深さ方向第２中
央部とを接続する第２給液配管と、上記第２三方弁と上
記貯湯タンクの深さ方向中間下部とを接続する第２戻り
液配管を備えたことを特徴としている。In order to achieve the above object, the invention according to claim 1 comprises a compressor, a four-way switching valve, an outdoor heat exchanger, a pressure reducing means, an indoor heat exchanger, and a hot water supply heat exchanger. A first solenoid valve connected to a discharge port of the compressor and a hot water supply heat exchanger through a first solenoid valve, which allows the outdoor heat exchanger to function as a condenser; A cooling operation performed by making the heat exchanger function as an evaporator, a heating operation performed by making the indoor heat exchanger function as a condenser while the outdoor heat exchanger functions as an evaporator, and the hot water supply heat exchanger And a hot water supply operation performed while the outdoor heat exchanger functions as an evaporator while functioning as a condenser.
In the heat pump water heater that is selectable, a second solenoid valve is interposed, and a second refrigerant that connects a downstream side of the first solenoid valve in the first refrigerant pipe and a suction port of the compressor. A pipe, a pump and a first three-way valve are interposed, a first liquid supply pipe connecting the liquid supply port of the hot water supply heat exchanger and the bottom of the hot water storage tank, and a second three-way valve are interposed. A first return liquid pipe connecting the return liquid port of the hot water supply heat exchanger and a first central part in the depth direction of the hot water storage tank; a first three-way valve and a second central part in the depth direction of the hot water storage tank; And a second return pipe connecting the second three-way valve and a lower part in the middle of the hot water storage tank in the depth direction.
【０００８】上記構成において、夏季の夜間において、
圧縮機の吐出口と給湯熱交換器とを連結する第１冷媒管
に介接された第１電磁弁が閉鎖される一方、上記第１冷
媒管における上記第１電磁弁の下流側と上記圧縮機の吸
入口とを連結する第２冷媒管に介接された第２電動弁が
開放される。そして、上記室外熱交換器を凝縮器として
機能させる一方上記給湯熱交換器を蒸発器として機能さ
せて蓄冷運転が行われる。そして、上記給湯熱交換器と
貯湯タンクの水との熱交換が行われて、上記貯湯タンク
の水に蓄冷される。[0008] In the above configuration, during the summer night,
The first solenoid valve interposed between the first refrigerant pipe connecting the discharge port of the compressor and the hot water supply heat exchanger is closed, while the downstream side of the first solenoid valve in the first refrigerant pipe and the compression valve are closed. The second motor-operated valve connected to the second refrigerant pipe connecting the suction port of the machine is opened. Then, the outdoor heat exchanger functions as a condenser while the hot water supply heat exchanger functions as an evaporator, thereby performing a cold storage operation. Then, heat exchange between the hot water supply heat exchanger and water in the hot water storage tank is performed, and the cold water is stored in the water in the hot water storage tank.
【０００９】一方、夏季の日中おいては、上記第１電磁
弁が開放されると共に、上記第２電磁弁が閉鎖される。
そして、上記給湯熱交換器を凝縮器として機能させる一
方上記室内熱交換器を蒸発器として機能させて放冷冷房
運転が行われる。そして、上記貯湯タンクの水に蓄積さ
れた冷熱を冷熱源とした冷房運転が行われる。こうし
て、外気を冷熱源とする場合よりも室内熱交換器の熱交
換能力を向上させて、日中における消費電力が削減され
る。On the other hand, during the daytime in summer, the first solenoid valve is opened and the second solenoid valve is closed.
Then, the cooling / heating cooling operation is performed with the hot water supply heat exchanger functioning as a condenser and the indoor heat exchanger functioning as an evaporator. Then, a cooling operation is performed using the cold stored in the water in the hot water storage tank as a cold heat source. Thus, the heat exchange capacity of the indoor heat exchanger is improved as compared with the case where the outside air is used as the cold heat source, and the power consumption during the day is reduced.
【００１０】また、上記給湯運転時には、上記第１三方
弁および第２三方弁を切り換え制御することによって、
上記貯湯タンク全体の水に蓄熱したり、上側半分の水に
蓄熱したり、蓄熱量を切り換え変更できる。同様に、上
記蓄冷運転時には、上記第１三方弁および第２三方弁を
切り換え制御することによって、上記貯湯タンクの下層
の水に蓄冷したり、下側半分の水のみに蓄冷したり、蓄
冷量を切り換え変更できる。Further, during the hot water supply operation, the first three-way valve and the second three-way valve are controlled to be switched, so that
Heat can be stored in the water in the entire hot water storage tank, heat can be stored in the upper half of the water, and the amount of heat stored can be changed. Similarly, at the time of the cold storage operation, the first three-way valve and the second three-way valve are switched and controlled to cool the water in the lower layer of the hot water storage tank, cool only the lower half of the water, or store the cold amount. Can be switched and changed.
【００１１】[0011]
【発明の実施の形態】以下、この発明を図示の実施の形
態により詳細に説明する。図１は本実施の形態のヒート
ポンプ給湯機における冷媒回路図である。本ヒートポン
プ給湯機は、圧縮機２５,四路切換弁２６,室外熱交換器
２７および電動膨張弁２８を有する室外ユニット２１
と、室内熱交換器３５を有する室内ユニット２２と、室
内熱交換器３６を有する室内ユニット２３と、給湯熱交
換器３７および貯湯タンク２８を有する貯湯タンクユニ
ット２４とから構成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a refrigerant circuit diagram in the heat pump water heater of the present embodiment. The present heat pump water heater includes an outdoor unit 21 having a compressor 25, a four-way switching valve 26, an outdoor heat exchanger 27, and an electric expansion valve 28.
, An indoor unit 22 having an indoor heat exchanger 35, an indoor unit 23 having an indoor heat exchanger 36, and a hot water storage tank unit 24 having a hot water supply heat exchanger 37 and a hot water storage tank 28.
【００１２】上記室外ユニット２１における圧縮機２５
の吐出口は電磁弁３４が介接された冷媒管によって四路
切換弁２６に接続される一方、吸入口はアキュムレータ
３９が介接された冷媒管によって四路切換弁２６に接続
されている。そして、四路切換弁２６には、室外熱交換
器２７および電動膨張弁２８が冷媒管によって順次接続
されている。電動膨張弁２８と四路切換弁２６との間に
は、電動弁３０および室内ユニット２２の室内熱交換器
３５が介接された冷媒管と、電動弁３１および室内ユニ
ット２３の室内熱交換器３６が介接された冷媒管とが、
並列に接続されている。The compressor 25 in the outdoor unit 21
The discharge port is connected to the four-way switching valve 26 by a refrigerant pipe interposed by an electromagnetic valve 34, while the suction port is connected to the four-way switching valve 26 by a refrigerant pipe interposed by an accumulator 39. An outdoor heat exchanger 27 and an electric expansion valve 28 are sequentially connected to the four-way switching valve 26 by a refrigerant pipe. A refrigerant pipe through which the electric valve 30 and the indoor heat exchanger 35 of the indoor unit 22 are interposed between the electric expansion valve 28 and the four-way switching valve 26, and the indoor heat exchanger of the electric valve 31 and the indoor unit 23 The refrigerant pipe 36 is interposed,
They are connected in parallel.
【００１３】また、上記電動膨張弁２８と圧縮機２５の
吐出口とには、電動弁２９と給湯熱交換器３７と上記第
１電磁弁としての電磁弁３２とが冷媒管４０,４１によ
って順次接続されている。そして、冷媒管４１における
電磁弁３２の下流側とアキュムレータ３９の上流側と
が、上記第２電磁弁としての電磁弁３３が介接された冷
媒管４２で接続されている。An electric valve 29, a hot water supply heat exchanger 37, and an electromagnetic valve 32 as the first electromagnetic valve are sequentially connected to the electric expansion valve 28 and the discharge port of the compressor 25 by refrigerant pipes 40 and 41, respectively. It is connected. The downstream side of the electromagnetic valve 32 in the refrigerant pipe 41 and the upstream side of the accumulator 39 are connected by a refrigerant pipe 42 in which the electromagnetic valve 33 as the second electromagnetic valve is interposed.
【００１４】ここで、上記給湯熱交換器３７は二重管熱
交換器であり、その外管の両端の夫々が冷媒管４０ある
いは冷媒管４１に接続されている。一方、内管の一端は
三方弁４３を介して貯湯タンク２８の深さ方向中間位置
に設けられた上側流入口４６に接続され、他端はポンプ
４４および三方弁４５を介して貯湯タンク２８の底に設
けられた下側流出口４７に接続されている。また、三方
弁４３を貯湯タンク３８における最下位置から上側へ向
かって略１/４の箇所に設けられた下側流入口４８に接
続し、三方弁４５を貯湯タンク３８の深さ方向中間位置
に設けられた上側流出口４９に接続している。こうし
て、上記二つの三方弁４３,４５を切り換えることによ
って、給湯熱交換器３７と熱交換を行う水を、貯湯タン
ク３８の中層の水と下層の水と下側半分の水に切り換え
るようにしている。The hot water supply heat exchanger 37 is a double-pipe heat exchanger, and both ends of the outer pipe are connected to the refrigerant pipe 40 or the refrigerant pipe 41, respectively. On the other hand, one end of the inner pipe is connected via a three-way valve 43 to an upper inlet 46 provided at a middle position in the depth direction of the hot water storage tank 28, and the other end of the hot water storage tank 28 is provided via a pump 44 and a three-way valve 45. It is connected to a lower outlet 47 provided at the bottom. Further, the three-way valve 43 is connected to a lower inlet 48 provided at approximately one-fourth from the lowermost position in the hot water storage tank 38 to the upper side, and the three-way valve 45 is positioned at a middle position in the depth direction of the hot water storage tank 38. Is connected to the upper outlet 49 provided at the bottom. In this way, by switching the two three-way valves 43 and 45, the water for heat exchange with the hot water supply heat exchanger 37 is switched to the middle water, the lower water, and the lower half water of the hot water storage tank 38. I have.
【００１５】上記構成のヒートポンプ給湯機は次のよう
に動作する。 (１) 冷房運転 冷房運転に際しては、図２に示すように、圧縮機２５の
吐出口が室外熱交換器３７に接続されるように四路切換
弁２６を切り換えると共に、電動弁２９および電磁弁３
２を閉鎖する。こうすることによって、冷媒の循環経路
は、矢印で示すように、圧縮機２５→四路切換弁２６→
室外熱交換器２７→電動膨張弁２８→電動弁３０,３１
→室内熱交換器３５,３６→四路切換弁２６→アキュム
レータ３９→圧縮機２５となる。その結果、室内熱交換
器３５,３６が蒸発器として使用される一方、室外熱交
換器２７が凝縮器として使用されて、通常の冷房運転が
実行される。The heat pump water heater having the above configuration operates as follows. (1) Cooling operation During the cooling operation, the four-way switching valve 26 is switched so that the discharge port of the compressor 25 is connected to the outdoor heat exchanger 37, as shown in FIG. 3
2 is closed. Thus, the circulation path of the refrigerant is changed from the compressor 25 to the four-way switching valve 26 as shown by the arrow.
Outdoor heat exchanger 27 → electric expansion valve 28 → electric valves 30, 31
→ The indoor heat exchangers 35 and 36 → the four-way switching valve 26 → the accumulator 39 → the compressor 25. As a result, while the indoor heat exchangers 35 and 36 are used as evaporators, the outdoor heat exchanger 27 is used as a condenser, and normal cooling operation is performed.
【００１６】その際に、上記電動弁２９および電磁弁３
２は閉鎖されているので、貯湯タンク３８内の水の温度
は常温である。At this time, the electric valve 29 and the solenoid valve 3
2 is closed, the temperature of the water in the hot water storage tank 38 is normal temperature.
【００１７】(２) 暖房運転 暖房運転に際しては、図３に示すように、圧縮機２５の
吐出口が室内熱交換器３５,３６に接続されるように四
路切換弁２６を切り換えると共に、電動弁２９および電
磁弁３２を閉鎖する。こうすることによって、冷媒の循
環経路は、矢印で示すように、圧縮機２５→四路切換弁
２６→室内熱交換器３５,３６→電動弁３０,３１→電動
膨張弁２８→室外熱交換器２７→四路切換弁２６→アキ
ュムレータ３９→圧縮機２５となる。その結果、室内熱
交換器３５,３６が凝縮器として使用される一方、室外
熱交換器２７が蒸発器として使用されて、通常の暖房運
転が実行される。(2) Heating Operation During the heating operation, the four-way switching valve 26 is switched so that the discharge port of the compressor 25 is connected to the indoor heat exchangers 35 and 36, as shown in FIG. The valve 29 and the solenoid valve 32 are closed. By doing so, the circulation path of the refrigerant is, as indicated by the arrow, the compressor 25 → the four-way switching valve 26 → the indoor heat exchangers 35 and 36 → the electric valves 30,31 → the electric expansion valve 28 → the outdoor heat exchanger. 27 → four-way switching valve 26 → accumulator 39 → compressor 25. As a result, while the indoor heat exchangers 35 and 36 are used as condensers, the outdoor heat exchanger 27 is used as an evaporator, and a normal heating operation is performed.
【００１８】その際に、上記電動弁２９および電磁弁３
２は閉鎖されているので、貯湯タンク３８内の水の温度
は常温である。At this time, the electric valve 29 and the solenoid valve 3
2 is closed, the temperature of the water in the hot water storage tank 38 is normal temperature.
【００１９】(３) 給湯運転 給湯運転に際しては、図４に示すように、圧縮機２５の
吐出口が室内熱交換器３５,３６に接続されるように四
路切換弁２６を切り換えると共に、電動弁３０,３１お
よび電磁弁３３,３４を閉鎖する。こうすることによっ
て、冷媒の循環経路は、矢印で示すように、圧縮機２５
→給湯熱交換器３７→電動弁２９→電動膨張弁２８→室
外熱交換器２７→四路切換弁２６→アキュムレータ３９
→圧縮機２５となる。その結果、給湯熱交換器３７が凝
縮器として使用される一方、室外熱交換器２７が蒸発器
として使用されて、貯湯タンク３８内の水に蓄熱され
る。(3) Hot Water Supply Operation In the hot water supply operation, as shown in FIG. 4, the four-way switching valve 26 is switched so that the discharge port of the compressor 25 is connected to the indoor heat exchangers 35 and 36, and the electric motor is operated. The valves 30, 31 and the solenoid valves 33, 34 are closed. By doing so, the circulation path of the refrigerant is compressed by the compressor 25
→ Heat supply heat exchanger 37 → Electric valve 29 → Electric expansion valve 28 → Outdoor heat exchanger 27 → Four-way switching valve 26 → Accumulator 39
→ The compressor 25 is obtained. As a result, while the hot water supply heat exchanger 37 is used as a condenser, the outdoor heat exchanger 27 is used as an evaporator and heat is stored in the water in the hot water storage tank 38.
【００２０】その際に、上記電動弁３０,３１及び電磁
弁３３,３４は閉鎖されているので、室内熱交換器３５,
３６による冷暖房は行われない。At this time, since the electric valves 30 and 31 and the solenoid valves 33 and 34 are closed, the indoor heat exchangers 35 and 31 are closed.
The cooling and heating by 36 is not performed.
【００２１】ここで、図１に示すように、上記貯湯タン
クユニット２４の三方弁４３を貯湯タンク３８の下側流
入口４８が給湯熱交換器３７に接続されるように切り替
える一方、三方弁４５を貯湯タンク３８の下側流出口４
７がポンプ４４に接続されるように切り替えた場合に
は、貯湯タンク３８全体の水に蓄熱される。また、三方
弁４３を貯湯タンク３８の上側流入口４６が給湯熱交換
器３７に接続されるように切り替える一方、三方弁４５
を貯湯タンク３８の上側流出口４９がポンプ４４に接続
されるように切り替えた場合には、貯湯タンク３８の上
側半分の水に蓄熱される。Here, as shown in FIG. 1, the three-way valve 43 of the hot water storage tank unit 24 is switched so that the lower inlet 48 of the hot water storage tank 38 is connected to the hot water supply heat exchanger 37, while the three-way valve 45 is switched. To the lower outlet 4 of the hot water storage tank 38.
When switching is performed so that 7 is connected to the pump 44, heat is stored in the water in the entire hot water storage tank 38. Further, the three-way valve 43 is switched so that the upper inlet 46 of the hot water storage tank 38 is connected to the hot water supply heat exchanger 37, while the three-way valve 45 is switched.
Is switched so that the upper outlet 49 of the hot water storage tank 38 is connected to the pump 44, heat is stored in the water in the upper half of the hot water storage tank 38.
【００２２】(４) 蓄冷運転 蓄冷運転に際しては、図５に示すように、圧縮機２５の
吐出口が室外熱交換器２７に接続されるように四路切換
弁２６を切り換えると共に、電動弁３０,３１および電
磁弁３２を閉鎖する。こうすることによって、冷媒の循
環経路は、矢印で示すように、圧縮機２５→四路切換弁
２６→室外熱交換器２７→電動膨張弁２８→電動弁２９
→給湯熱交換器３７→アキュムレータ３９→圧縮機２５
となる。その結果、給湯熱交換器３７が蒸発器として使
用される一方、室外熱交換器２７が凝縮器として使用さ
れて、貯湯タンク３８内の水に蓄冷される。(4) Cold Storage Operation In the cold storage operation, the four-way switching valve 26 is switched so that the discharge port of the compressor 25 is connected to the outdoor heat exchanger 27 as shown in FIG. , 31 and the solenoid valve 32 are closed. By doing so, the circulation path of the refrigerant is changed from the compressor 25, the four-way switching valve 26, the outdoor heat exchanger 27, the electric expansion valve 28, and the electric valve 29, as indicated by arrows.
→ Heat supply heat exchanger 37 → Accumulator 39 → Compressor 25
Becomes As a result, while the hot water supply heat exchanger 37 is used as an evaporator, the outdoor heat exchanger 27 is used as a condenser, and the water in the hot water storage tank 38 is cooled.
【００２３】その際に、上記電動弁３０,３１は閉鎖さ
れているので、室内熱交換器３５,３６による冷暖房は
行われない。At this time, since the electric valves 30 and 31 are closed, cooling and heating by the indoor heat exchangers 35 and 36 are not performed.
【００２４】ここで、図１に示すように、上記貯湯タン
クユニット２４の三方弁４３を貯湯タンク３８の下側流
入口４８が給湯熱交換器３７に接続されるように切り替
える一方、三方弁４５を貯湯タンク３８の下側流出口４
７がポンプ４４に接続されるように切り替えた場合に
は、貯湯タンク３８の下層の水に蓄冷される。また、三
方弁４３を貯湯タンク３８の上側流入口４６が給湯熱交
換器３７に接続されるように切り替える一方、三方弁４
５を貯湯タンク３８の下側流出口４７がポンプ４４に接
続されるように切り替えた場合には、貯湯タンク３８の
下側半分の水に蓄冷される。Here, as shown in FIG. 1, the three-way valve 43 of the hot water storage tank unit 24 is switched so that the lower inlet 48 of the hot water storage tank 38 is connected to the hot water supply heat exchanger 37, while the three-way valve 45 is switched. To the lower outlet 4 of the hot water storage tank 38.
When switching is performed so that 7 is connected to the pump 44, cold water is stored in the lower layer of water in the hot water storage tank 38. Further, the three-way valve 43 is switched so that the upper inlet 46 of the hot water storage tank 38 is connected to the hot water supply heat exchanger 37, while the three-way valve 4 is switched.
When 5 is switched so that the lower outlet 47 of the hot water storage tank 38 is connected to the pump 44, the cold water is stored in the lower half of the water of the hot water storage tank 38.
【００２５】このように、本実施の形態においては、給
湯熱交換器３７を蒸発器として使用して、貯湯タンクユ
ニット２４に蓄冷機能を持たせることができるのであ
る。As described above, in the present embodiment, the hot water supply heat exchanger 37 can be used as an evaporator, and the hot water storage tank unit 24 can have a cool storage function.
【００２６】(５) 放冷冷房運転 放冷冷房運転に際しては、図６に示すように、圧縮機２
５の吐出口が室外熱交換器２７に接続されるように四路
切換弁２６を切り換えると共に、電動膨張弁２８および
電磁弁３３,３４を閉鎖する。こうすることによって、
冷媒の循環経路は、矢印で示すように、圧縮機２５→給
湯熱交換器３７→電動弁２９→電動弁３０,３１→室内
熱交換器３５,３６→四路切換弁２６→アキュムレータ
３９→圧縮機２５となる。その結果、給湯熱交換器３７
は凝縮器として使用される一方、室内熱交換器３５,３
６は蒸発器として使用されて、上記蓄冷運転によって貯
湯タンク３８内の水に蓄積された冷熱を室内ユニット２
２,２３に搬送して放出する放冷冷房運転が行われる。(5) Cooling / cooling operation In cooling / cooling operation, as shown in FIG.
The four-way switching valve 26 is switched so that the discharge port 5 is connected to the outdoor heat exchanger 27, and the electric expansion valve 28 and the solenoid valves 33 and 34 are closed. By doing this,
The circulation path of the refrigerant is, as indicated by the arrow, the compressor 25 → the hot water supply heat exchanger 37 → the electric valve 29 → the electric valves 30, 31 → the indoor heat exchangers 35, 36 → the four-way switching valve 26 → the accumulator 39 → the compression. Machine 25. As a result, the hot water supply heat exchanger 37
Is used as a condenser while the indoor heat exchangers 35, 3
Numeral 6 is used as an evaporator to cool the cold stored in the water in the hot water storage tank 38 by the cold storage operation.
A cooling / cooling operation is performed in which the cooling water is conveyed to and discharged from the cooling medium 2, 23.
【００２７】ところで、夏季の冷房運転時において、日
中には外気温度が高いために、高圧側の冷媒温度を十分
下げることができない。そこで、夜間電力を利用して上
記蓄冷運転をおこなって貯湯タンク３８内の水に蓄冷し
ておき、日中には貯湯タンク３８内の水に蓄積された冷
熱を冷熱源として放冷冷房運転を行うのである。このよ
うに、上記貯湯タンク３８内の水に蓄積された冷熱を冷
熱源として利用することによって、外気を冷熱源とする
場合よりも室内熱交換器３５,３６の熱交換能力を向上
させることができ、日中における消費電力を削減でき
る。By the way, during the cooling operation in summer, since the outside air temperature is high in the daytime, the refrigerant temperature on the high pressure side cannot be sufficiently lowered. Therefore, the above-described cold storage operation is performed by using the nighttime electric power to cool the water in the hot water storage tank 38, and in the daytime, the cooling / cooling operation using the cold stored in the water in the hot water storage tank 38 as a cold heat source. Do it. As described above, by using the cold stored in the water in the hot water storage tank 38 as a cold heat source, the heat exchange capacity of the indoor heat exchangers 35 and 36 can be improved as compared with the case where the outside air is used as the cold heat source. And power consumption during the day can be reduced.
【００２８】上述のように、本実施の形態においては、
上記給湯熱交換器３７と圧縮機２５の吐出口とを電磁弁
３２が介接された冷媒管４１で接続し、この冷媒管４１
における電磁弁３２の下流側とアキュムレータ３９の上
流側とを電磁弁３３が介接された冷媒管４２で接続して
いる。したがって、圧縮機２５の吐出口が室外熱交換器
２７に接続されるように四路切換弁２６を切り換えると
共に、電動弁３０,３１および電磁弁３２を閉鎖するこ
とによって、給湯熱交換器３７を蒸発器として使用する
ことができ、貯湯タンク３８内の水に蓄冷することがで
きる。したがって、本実施の形態によれば、夏季におい
て、夜間電力を利用して貯湯タンク３８内の水に蓄冷し
て、日中に貯湯タンク３８内の水に蓄積された冷熱を冷
熱源として冷房運転を行うことができる。こうして、夏
季の日中における圧縮機２５の吸い込み温度の上昇を押
さえ、消費電力の削減を図ることができるのである。As described above, in the present embodiment,
The hot water supply heat exchanger 37 and the discharge port of the compressor 25 are connected by a refrigerant pipe 41 having an electromagnetic valve 32 interposed therebetween.
The downstream side of the electromagnetic valve 32 and the upstream side of the accumulator 39 are connected by a refrigerant pipe 42 in which the electromagnetic valve 33 is interposed. Therefore, by switching the four-way switching valve 26 so that the discharge port of the compressor 25 is connected to the outdoor heat exchanger 27 and closing the electric valves 30 and 31 and the solenoid valve 32, the hot water supply heat exchanger 37 is It can be used as an evaporator, and can store cold water in the hot water storage tank 38. Therefore, according to the present embodiment, in summer, the electric power is stored in the water in hot water storage tank 38 using nighttime electric power, and the cooling operation is performed using the cold stored in the water in hot water storage tank 38 during the day as a cold heat source. It can be performed. In this way, it is possible to suppress an increase in the suction temperature of the compressor 25 during the daytime in summer and reduce power consumption.
【００２９】尚、この発明における室内ユニットの数や
給湯熱交換器３７の具体的構造は、上記実施の形態に限
定されるものではない。The number of indoor units and the specific structure of the hot water supply heat exchanger 37 in the present invention are not limited to the above embodiment.
【００３０】[0030]
【発明の効果】以上より明らかなように、請求項１に係
る発明のヒートポンプ給湯機は、圧縮機,四路切換弁,室
外熱交換器,減圧手段,室内熱交換器および給湯熱交換器
を有すると共に、第１電磁弁が介接されて上記圧縮機の
吐出口と給湯熱交換器とを連結する第１冷媒管と、第２
電磁弁が介接されて上記第１冷媒管における上記第１電
磁弁の下流側と上記圧縮機の吸入口とを連結する第２冷
媒管を有するので、上記第１電磁弁を閉鎖する一方、上
記第２電動弁を開放することによって、上記給湯熱交換
器を蒸発器として機能させることができる。したがっ
て、夏季において、夜間に上記給湯熱交換器を蒸発器と
して機能させる蓄冷運転を行って貯湯タンクの水に蓄冷
し、日中には、上記給湯熱交換器を凝縮器として機能さ
せる一方上記室内熱交換器を蒸発器として機能させる放
冷冷房運転を行って、外気を冷熱源とする場合よりも室
内熱交換器の熱交換能力を向上させることができる。As is clear from the above, the heat pump water heater according to the first aspect of the present invention comprises a compressor, a four-way switching valve, an outdoor heat exchanger, a pressure reducing means, an indoor heat exchanger, and a hot water supply heat exchanger. A first refrigerant pipe having a first solenoid valve interposed therebetween and connecting a discharge port of the compressor and a hot water supply heat exchanger;
Since the solenoid valve is interposed and has a second refrigerant pipe connecting the downstream side of the first solenoid valve in the first refrigerant pipe and the suction port of the compressor, the first solenoid valve is closed, By opening the second motor-operated valve, the hot water supply heat exchanger can function as an evaporator. Therefore, in summer, a cold storage operation is performed in the night to make the hot water supply heat exchanger function as an evaporator to cool the water in the hot water storage tank. By performing a cooling / cooling operation in which the heat exchanger functions as an evaporator, the heat exchange capacity of the indoor heat exchanger can be improved as compared with the case where outside air is used as a cold heat source.
【００３１】すなわち、この発明によれば、夏季の夜間
における余剰電力によって蓄冷を行い、日中における電
力ピーク時には、上記放冷冷房運転を行って消費電力を
削減することができる。That is, according to the present invention, it is possible to perform cold storage by using surplus power during the night in summer, and to reduce power consumption by performing the cooling / cooling operation at the time of peak power during the day.
【００３２】また、上記給湯熱交換器の給液口と貯湯タ
ンクの底部とをポンプおよび第１三方弁が介設された第
１給液配管で接続し、上記給湯熱交換器の戻り液口と上
記貯湯タンクの深さ方向第１中央部とを第２三方弁が介
設された第１戻り液配管で接続し、上記第１三方弁と上
記貯湯タンクの深さ方向第２中央部とを第２給液配管で
接続し、上記第２三方弁と上記貯湯タンクの深さ方向中
間下部とを第２戻り液配管で接続したので、給湯運転時
には、上記第１三方弁および第２三方弁を切り換え制御
することによって、上記貯湯タンク全体の水に蓄熱した
り、上側半分の水に蓄熱したり、蓄熱量を切り換え変更
できる。同様に、上記蓄冷運転時には、上記第１三方弁
および第２三方弁を切り換え制御することによって、上
記貯湯タンクの下層の水に蓄冷したり、下側半分の水の
みに蓄冷したり、蓄冷量を切り換え変更できる。Further, the liquid supply port of the hot water supply heat exchanger and the bottom of the hot water storage tank are connected by a first liquid supply pipe provided with a pump and a first three-way valve, and the return liquid port of the hot water supply heat exchanger is connected. And a first central portion in the depth direction of the hot water storage tank are connected by a first return liquid pipe having a second three-way valve interposed therebetween, and the first three-way valve and a second central portion in the depth direction of the hot water storage tank are connected to each other. Are connected by a second liquid supply pipe, and the second three-way valve and the lower middle part in the depth direction of the hot water storage tank are connected by a second return liquid pipe. Therefore, during the hot water supply operation, the first three-way valve and the second three-way valve are connected. By controlling the switching of the valve, the heat can be stored in the water in the entire hot water storage tank, the heat can be stored in the upper half of the water, or the heat storage amount can be switched and changed. Similarly, at the time of the cold storage operation, the first three-way valve and the second three-way valve are switched and controlled to cool the water in the lower layer of the hot water storage tank, cool only the lower half of the water, or store the cold amount. Can be switched and changed.
【図１】この発明のヒートポンプ給湯機における冷媒回
路図である。FIG. 1 is a refrigerant circuit diagram in a heat pump water heater according to the present invention.
【図２】図１に示すヒートポンプ給湯機による冷房運転
時における四路切換弁,電動弁および電磁弁の状態を示
す図である。FIG. 2 is a diagram showing states of a four-way switching valve, an electric valve, and a solenoid valve during a cooling operation by the heat pump water heater shown in FIG.
【図３】図１に示すヒートポンプ給湯機による暖房運転
時における四路切換弁,電動弁および電磁弁の状態を示
す図である。3 is a diagram showing states of a four-way switching valve, an electric valve, and a solenoid valve during a heating operation by the heat pump water heater shown in FIG. 1.
【図４】図１に示すヒートポンプ給湯機による給湯運転
時における四路切換弁,電動弁および電磁弁の状態を示
す図である。4 is a diagram showing states of a four-way switching valve, an electric valve, and a solenoid valve during a hot water supply operation by the heat pump water heater shown in FIG. 1.
【図５】図１に示すヒートポンプ給湯機による蓄冷運転
時における四路切換弁,電動弁および電磁弁の状態を示
す図である。5 is a diagram showing states of a four-way switching valve, a motor-operated valve, and a solenoid valve during a cold storage operation by the heat pump water heater shown in FIG. 1.
【図６】図１に示すヒートポンプ給湯機による放冷冷房
運転時における四路切換弁,電動弁および電磁弁の状態
を示す図である。FIG. 6 is a diagram showing states of a four-way switching valve, an electric valve, and a solenoid valve during a cooling / cooling operation by the heat pump water heater shown in FIG. 1;
【図７】従来のヒートポンプ給湯機における冷媒回路図
である。FIG. 7 is a refrigerant circuit diagram in a conventional heat pump water heater.
２１…室外ユニット、 ２２,２３…室内
ユニット、 ２４…貯湯タンクユニット、 ２５…圧縮機、 ２６…四路切換弁、 ２７…室外熱交換
器、 ２８…電動膨張弁、 ２９〜３１…電動
弁、 ３２〜３４…電磁弁、 ３５,３６…室内
熱交換器、 ３７…給湯熱交換器、 ３８…貯湯タン
ク、 ４０,４１…冷媒管。21: outdoor unit, 22, 23: indoor unit, 24: hot water storage tank unit, 25: compressor, 26: four-way switching valve, 27: outdoor heat exchanger, 28: electric expansion valve, 29-31: electric valve, 32 to 34: solenoid valves, 35, 36: indoor heat exchanger, 37: hot water supply heat exchanger, 38: hot water storage tank, 40, 41: refrigerant pipe.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F25B 29/00 371 F24H 1/18 F25B 13/00 104 F25B 13/00 351 F28D 20/00 F25B 30/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) F25B 29/00 371 F24H 1/18 F25B 13/00 104 F25B 13/00 351 F28D 20/00 F25B 30/02
Claims (1)
交換器(２７),減圧手段(２８,３０,３１),室内熱交換器
(３５,３６)および給湯熱交換器(３７)を有すると共
に、第１電磁弁(３２)が介接されて上記圧縮機(２５)の
吐出口と給湯熱交換器(３７)とを連結する第１冷媒管
(４１)を有して、上記室外熱交換器(２７)を凝縮器とし
て機能させる一方上記室内熱交換器(３５,３６)を蒸発
器として機能させて行う冷房運転と、上記室内熱交換器
(３５,３６)を凝縮器として機能させる一方上記室外熱
交換器(２７)を蒸発器として機能させて行う暖房運転
と、上記給湯熱交換器(３７)を凝縮器として機能させる
一方上記室外熱交換器(２７)を蒸発器として機能させて
行う給湯運転とを、選択可能になっているヒートポンプ
給湯機において、 第２電磁弁(３３)が介接されると共に、上記第１冷媒管
（４１)における上記第１電磁弁(３２)の下流側と上記
圧縮機(２５)の吸入口とを連結する第２冷媒管(４２)
と、 ポンプ(４４)および第１三方弁(４５)が介設されると共
に、上記給湯熱交換器(３７)の給液口と貯湯タンク(３
８)の底部とを接続する第１給液配管と、 第２三方弁(４３)が介設されると共に、上記給湯熱交換
器(３７)の戻り液口と上記貯湯タンク(３８)の深さ方向
第１中央部とを接続する第１戻り液配管と、 上記第１三方弁(４５)と上記貯湯タンク(３８)の深さ方
向第２中央部とを接続する第２給液配管と、 上記第２三方弁(４３)と上記貯湯タンク(３８)の深さ方
向中間下部とを接続する第２戻り液配管を備えたことを
特徴とするヒートポンプ給湯機。1. A compressor (25), a four-way switching valve (26), an outdoor heat exchanger (27), a pressure reducing means (28, 30, 31), an indoor heat exchanger
(35, 36) and a hot water supply heat exchanger (37), and a first solenoid valve (32) is interposed between the discharge port of the compressor (25) and the hot water supply heat exchanger (37). 1st refrigerant pipe
(41) a cooling operation in which the outdoor heat exchanger (27) functions as a condenser while the indoor heat exchangers (35, 36) function as evaporators;
(35, 36) function as a condenser while the outdoor heat exchanger (27) functions as an evaporator for heating operation, and the hot water supply heat exchanger (37) functions as a condenser while the outdoor heat exchanger (37) functions as a condenser. In a heat pump water heater capable of selecting a hot water supply operation performed by causing the exchanger (27) to function as an evaporator, a second solenoid valve (33) is interposed and the first refrigerant pipe (41) is provided. ), A second refrigerant pipe (42) connecting the downstream side of the first solenoid valve (32) and the suction port of the compressor (25).
A pump (44) and a first three-way valve (45) are interposed, and a liquid supply port of the hot water supply heat exchanger (37) and a hot water storage tank (3) are provided.
A first liquid supply pipe connecting the bottom of 8), a second three-way valve (43) is interposed, a return liquid port of the hot water supply heat exchanger (37) and a depth of the hot water storage tank (38). A first return liquid pipe connecting the first three-way valve (45) and the second central part in the depth direction of the hot water storage tank (38); A heat pump water heater comprising a second return liquid pipe connecting the second three-way valve (43) and a lower portion in the depth direction of the hot water storage tank (38).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6291496A JP2980022B2 (en) | 1996-03-19 | 1996-03-19 | Heat pump water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6291496A JP2980022B2 (en) | 1996-03-19 | 1996-03-19 | Heat pump water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09250839A JPH09250839A (en) | 1997-09-22 |
| JP2980022B2 true JP2980022B2 (en) | 1999-11-22 |
Family
ID=13214008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6291496A Expired - Fee Related JP2980022B2 (en) | 1996-03-19 | 1996-03-19 | Heat pump water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2980022B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007010242A (en) * | 2005-06-30 | 2007-01-18 | Toshiba Kyaria Kk | Heat pump type hot water supply device |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11294886A (en) * | 1998-04-14 | 1999-10-29 | Hitachi Ltd | Air conditioner with heat storage tank |
| JP5200996B2 (en) * | 2009-02-24 | 2013-06-05 | ダイキン工業株式会社 | Heat pump system |
| CN102486344B (en) * | 2010-12-02 | 2013-09-25 | 陈则韶 | Compact cooling/heating air-conditioning and hot water supply three-purpose machine capable of building natural circulating flow for heat exchange |
| CN102563962A (en) * | 2011-11-25 | 2012-07-11 | 海信（山东）空调有限公司 | Multi-split air conditioning system with compressor capable of directly heating water and working method of multi-split air conditioning system |
| CN102494439B (en) * | 2011-12-07 | 2013-07-24 | 南京大学 | Photovoltaic photo-thermal energy-storage heat pump system |
| JP6458456B2 (en) * | 2014-11-07 | 2019-01-30 | ダイキン工業株式会社 | Air conditioning system |
| CN106152263B (en) * | 2015-04-07 | 2020-03-17 | 大金工业株式会社 | Air conditioning system and control method thereof |
| CN106152332B (en) * | 2015-04-07 | 2020-07-07 | 大金工业株式会社 | Air conditioning system and control method thereof |
| CN107894111B (en) * | 2016-09-30 | 2020-10-02 | 大金工业株式会社 | Air conditioning system and control method thereof |
| KR102261862B1 (en) * | 2020-01-29 | 2021-06-07 | 엘지전자 주식회사 | Air Conditioner System for Simultaneous Cooling, Heating and hot water supplying and Control Method of the Same |
| CN111486613B (en) * | 2020-04-29 | 2022-05-20 | 广东美的暖通设备有限公司 | Air conditioning system, control method and device thereof and storage medium |
-
1996
- 1996-03-19 JP JP6291496A patent/JP2980022B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007010242A (en) * | 2005-06-30 | 2007-01-18 | Toshiba Kyaria Kk | Heat pump type hot water supply device |
| JP4549241B2 (en) * | 2005-06-30 | 2010-09-22 | 東芝キヤリア株式会社 | Heat pump type water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09250839A (en) | 1997-09-22 |
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