JPH1163661A - Heat pump hot water supplier - Google Patents
Heat pump hot water supplierInfo
- Publication number
- JPH1163661A JPH1163661A JP21506497A JP21506497A JPH1163661A JP H1163661 A JPH1163661 A JP H1163661A JP 21506497 A JP21506497 A JP 21506497A JP 21506497 A JP21506497 A JP 21506497A JP H1163661 A JPH1163661 A JP H1163661A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- water supply
- temperature
- heat exchanger
- tank
- 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.)
- Granted
Links
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、空調機能と給湯
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 an air conditioning function and a hot water supply function.
【０００２】[0002]
【従来の技術】従来、ヒートポンプ給湯機としては、室
外ユニット,室内ユニットおよび給湯タンクユニットを
備えて、冷暖房運転および給湯運転を行うものがある。
このヒートポンプ給湯機は、室外ユニットの圧縮機,四
路弁,室外熱交換器,減圧器および室内ユニットの室内熱
交換器を環状に接続して構成された冷媒回路と、上記圧
７縮機の吐出側に一端が接続され、他端が上記室外熱交
換器の減圧器側に電動膨張弁を介して接続された給湯熱
交換器とを有している。上記圧縮機から吐出された冷媒
を給湯熱交換器,電動膨張弁および室外熱交換器を循環
させると共に、循環ポンプにより給湯タンク内の水を給
湯熱交換器を介して循環させることによって、給湯タン
ク内の水を加熱して湯を沸かすヒートポンプ給湯運転を
行う。2. Description of the Related Art Conventionally, as a heat pump water heater, there is a heat pump water heater provided with an outdoor unit, an indoor unit and a hot water supply tank unit for performing a cooling / heating operation and a hot water supply operation.
This heat pump water heater has a refrigerant circuit configured by connecting a compressor of an outdoor unit, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger of an indoor unit in an annular manner, One end is connected to the discharge side, and the other end has a hot water supply heat exchanger connected to the decompressor side of the outdoor heat exchanger via an electric expansion valve. The refrigerant discharged from the compressor is circulated through the hot water supply heat exchanger, the electric expansion valve, and the outdoor heat exchanger, and the water in the hot water supply tank is circulated by the circulation pump through the hot water supply heat exchanger. A heat pump hot water supply operation is performed to heat the water inside and boil the water.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記ヒート
ポンプ給湯機では、冬季にヒートポンプ給湯運転が装置
の故障によって湯温を保てなくなると、給湯タンク内の
水が凍結する虞れがある。By the way, in the heat pump water heater described above, if the heat pump hot water supply operation cannot maintain the hot water temperature in winter due to a failure of the device, the water in the hot water supply tank may freeze.
【０００４】そこで、この発明の目的は、ヒートポンプ
等が故障しても、給湯タンク内の水の凍結を防止できる
ヒートポンプ給湯機を提供することにある。An object of the present invention is to provide a heat pump water heater capable of preventing freezing of water in a hot water supply tank even if a heat pump or the like fails.
【０００５】[0005]
【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のヒートポンプ給湯機は、圧縮機,室外熱
交換器,減圧器および室内熱交換器が環状に接続された
冷媒回路と、上記圧縮機の吐出側に一端が接続され、他
端が上記室外熱交換器と上記減圧器との間の冷媒配管に
電動膨張弁を介して接続された給湯熱交換器と、上記給
湯熱交換器を介して内部の水が加熱される給湯タンク
と、上記給湯タンク内の水を上記給湯熱交換器を介して
循環させる循環ポンプとを備えたヒートポンプ給湯機に
おいて、上記給湯タンク内の水の温度を検出する温度セ
ンサと、上記温度センサにより検出された上記給湯タン
ク内の水の温度が所定温度以下であるか否かを判別する
温度判別部と、上記給湯熱交換器を介して上記給湯タン
ク内の水を加熱することが可能か否かを上記冷媒回路の
状態に基づいて判別するヒートポンプ給湯判別部と、上
記温度判別部が上記給湯タンク内の水の温度が上記所定
温度以下であると判別し、かつ、上記ヒートポンプ給湯
判別部が上記給湯熱交換器を介して上記給湯タンク内の
水を加熱することができないと判別すると、上記循環ポ
ンプを動作させる循環ポンプ制御部とを備えたことを特
徴としている。According to a first aspect of the present invention, there is provided a heat pump water heater, comprising: a refrigerant circuit in which a compressor, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger are connected in a ring; A hot water supply heat exchanger having one end connected to the discharge side of the compressor and the other end connected to a refrigerant pipe between the outdoor heat exchanger and the pressure reducer via an electric expansion valve; In a heat pump water heater provided with a hot water supply tank in which water inside is heated via a water heater and a circulation pump for circulating the water in the hot water supply tank through the hot water supply heat exchanger, water in the hot water supply tank is provided. A temperature sensor that detects a temperature, a temperature determination unit that determines whether the temperature of the water in the hot water supply tank detected by the temperature sensor is equal to or lower than a predetermined temperature, and the hot water supply via the hot water supply heat exchanger. Heating the water in the tank A heat pump hot water supply determining unit that determines whether or not it is possible based on the state of the refrigerant circuit; and the temperature determining unit determines that the temperature of the water in the hot water supply tank is equal to or lower than the predetermined temperature, and When the determination unit determines that the water in the hot water supply tank cannot be heated via the hot water supply heat exchanger, a circulation pump control unit that operates the circulation pump is provided.
【０００６】上記請求項１のヒートポンプ給湯機によれ
ば、冬季において、例えば、暖房運転中、外気温度が低
いときは、凝縮温度が低くなるため、ヒートポンプ給湯
運転を同時に行うことができなかったり、過負荷等によ
り過電流保護が働いて、ヒートポンプ給湯運転ができな
かったりするような状態に上記冷媒回路がある場合、上
記給湯タンク内の湯温を保つことができず、給湯タンク
内の水温が低下する。そして、上記温度判別部が給湯タ
ンク内の水の温度が所定温度(例えば凍結温度よりも１
〜２℃高い温度)以下であると判別し、かつ、上記冷媒回
路の状態に基づいてヒートポンプ給湯判別部が給湯熱交
換器を介して給湯タンク内の水を加熱することができな
いと判別すると、すなわち、ヒートポンプ給湯運転がで
きないと判別すると、上記循環ポンプ制御部により循環
ポンプを動作させて、給湯タンク内の水を給湯熱交換器
を介して循環させる。そうすることによって、上記給湯
タンク内の水を流動させて、凍結温度以下でも凍結しな
いようにする。したがって、ヒートポンプが故障して
も、循環ポンプを運転することによって、給湯タンク内
の水の凍結を防止でき、信頼性を向上できる。According to the heat pump water heater of the first aspect, in winter, for example, during the heating operation, when the outside air temperature is low, the condensing temperature becomes low, so that the heat pump water heating operation cannot be performed at the same time. If the refrigerant circuit is in a state where overcurrent protection is activated due to overload or the like and the heat pump hot water supply operation cannot be performed, the hot water temperature in the hot water tank cannot be maintained, and the water temperature in the hot water tank becomes descend. Then, the temperature determination unit determines that the temperature of the water in the hot water supply tank is a predetermined temperature (for example, 1
When the heat pump hot water supply determination unit determines that the water in the hot water supply tank cannot be heated via the hot water supply heat exchanger based on the state of the refrigerant circuit, That is, when it is determined that the heat pump hot water supply operation cannot be performed, the circulation pump is operated by the circulation pump control unit, and the water in the hot water supply tank is circulated through the hot water supply heat exchanger. By doing so, the water in the hot water supply tank is caused to flow so as not to freeze even at a freezing temperature or lower. Therefore, even if the heat pump breaks down, by operating the circulation pump, freezing of water in the hot water supply tank can be prevented, and reliability can be improved.
【０００７】また、請求項２のヒートポンプ給湯機は、
圧縮機,室外熱交換器,減圧器および室内熱交換器が環状
に接続された冷媒回路と、上記圧縮機の吐出側に一端が
接続され、他端が上記室外熱交換器と上記減圧器との間
の冷媒配管に電動膨張弁を介して接続された給湯熱交換
器と、上記給湯熱交換器を介して内部の水が加熱される
給湯タンクと、上記給湯タンク内の水を上記給湯熱交換
器を介して循環させる循環ポンプと、上記給湯タンク内
の水を加熱するヒータとを備えたヒートポンプ給湯機に
おいて、上記給湯タンク内の水の温度を検出する温度セ
ンサと、上記温度センサにより検出された上記給湯タン
ク内の水の温度が所定温度以下であるか否かを判別する
温度判別部と、上記給湯熱交換器を介して上記給湯タン
ク内の水を加熱することが可能か否かを上記冷媒回路の
状態に基づいて判別するヒートポンプ給湯判別部と、上
記温度判別部が上記給湯タンク内の水の温度が上記所定
温度以下であると判別し、かつ、上記ヒートポンプ給湯
判別部が上記給湯熱交換器を介して上記給湯タンク内の
水を加熱することができないと判別すると、上記ヒータ
に通電させるヒータ制御部とを備えたことを特徴として
いる。The heat pump water heater according to claim 2 is
A compressor, an outdoor heat exchanger, a refrigerant circuit in which a decompressor and an indoor heat exchanger are connected in a ring, and one end is connected to the discharge side of the compressor, and the other end is connected to the outdoor heat exchanger and the decompressor. A hot water supply heat exchanger connected to a refrigerant pipe between the two via an electric expansion valve, a hot water supply tank in which internal water is heated via the hot water supply heat exchanger, and water in the hot water supply tank In a heat pump water heater having a circulation pump circulating through an exchanger and a heater for heating water in the hot water tank, a temperature sensor for detecting a temperature of the water in the hot water tank and a temperature sensor for detecting the temperature of the water in the hot water tank A temperature discriminator for discriminating whether or not the temperature of the water in the hot water supply tank is equal to or lower than a predetermined temperature; and whether or not the water in the hot water supply tank can be heated via the hot water supply heat exchanger. Is determined based on the state of the refrigerant circuit. A heat pump hot water supply discriminating unit, the temperature discriminating unit discriminates that the temperature of water in the hot water supply tank is equal to or lower than the predetermined temperature, and the heat pump hot water supply discriminating unit communicates with the hot water tank via the hot water heat exchanger. A heater control unit that supplies electricity to the heater when it is determined that the water in the inside cannot be heated.
【０００８】上記請求項２のヒートポンプ給湯機によれ
ば、冬季において、例えば、暖房運転中、外気温度が低
いときは、凝縮温度が低くなるため、ヒートポンプ給湯
運転を同時に行うことができなかったり、過負荷等によ
り過電流保護が働いて、ヒートポンプ給湯運転ができな
かったりするような状態に上記冷媒回路がある場合、上
記給湯タンク内の湯温を保つことができず、給湯タンク
内の水温が低下する。そして、上記温度判別部が給湯タ
ンク内の水の温度が所定温度(例えば凍結温度よりも１
〜２℃高い温度)以下であると判別し、かつ、上記冷媒
回路の状態に基づいてヒートポンプ給湯判別部が給湯熱
交換器を介して給湯タンク内の水を加熱することができ
ないと判別すると、すなわち、ヒートポンプ給湯運転が
できないと判別すると、上記ヒータ制御部により上記ヒ
ータに通電させて、給湯タンク内の水を加熱する。そう
することによって、給湯タンク内の水を温めて、凍結し
ないようにする。したがって、ヒートポンプが故障して
も、ヒータを通電することによって、給湯タンク内の水
の凍結を防止でき、信頼性を向上できる。According to the heat pump water heater of the second aspect, in winter, for example, during the heating operation, when the outside air temperature is low, the condensing temperature becomes low, so that the heat pump water heating operation cannot be performed at the same time. If the refrigerant circuit is in a state where overcurrent protection is activated due to overload or the like and the heat pump hot water supply operation cannot be performed, the hot water temperature in the hot water tank cannot be maintained, and the water temperature in the hot water tank becomes descend. Then, the temperature determination unit determines that the temperature of the water in the hot water supply tank is a predetermined temperature (for example, 1
When the heat pump hot water supply determination unit determines that the water in the hot water supply tank cannot be heated via the hot water supply heat exchanger based on the state of the refrigerant circuit, That is, when it is determined that the heat pump hot water supply operation cannot be performed, the heater control unit supplies electricity to the heater to heat water in the hot water supply tank. Doing so warms the water in the hot water tank and prevents it from freezing. Therefore, even if the heat pump breaks down, freezing of water in the hot water supply tank can be prevented by energizing the heater, and reliability can be improved.
【０００９】また、請求項３のヒートポンプ給湯機は、
圧縮機,室外熱交換器,減圧器および室内熱交換器が環状
に接続された冷媒回路と、上記圧縮機の吐出側に一端が
接続され、他端が上記室外熱交換器と上記減圧器との間
の冷媒配管に電動膨張弁を介して接続された給湯熱交換
器と、上記給湯熱交換器を介して内部の水が加熱される
給湯タンクと、上記給湯タンク内の水を上記給湯熱交換
器を介して循環させる循環ポンプと、上記給湯タンク内
の水を加熱するヒータとを備えたヒートポンプ給湯機に
おいて、上記給湯タンク内の水の温度を検出する温度セ
ンサと、上記温度センサにより検出された上記給湯タン
ク内の水の温度が所定温度以下であるか否かを判別する
温度判別部と、上記給湯熱交換器を介して上記給湯タン
ク内の水を加熱することが可能か否かを上記冷媒回路の
状態に基づいて判別するヒートポンプ給湯判別部と、上
記ヒータが通電可能か否かを判別するヒータ判別部と、
上記温度判別部が上記給湯タンク内の水の温度が上記所
定温度以下であると判別し、かつ、上記ヒートポンプ給
湯判別部が上記給湯熱交換器を介して上記給湯タンク内
の水を加熱することができないと判別し、かつ、上記ヒ
ータ判別部が上記ヒータが通電不能であると判別する
と、上記循環ポンプを動作させる循環ポンプ制御部とを
備えたことを特徴としている。Further, the heat pump water heater according to claim 3 is:
A compressor, an outdoor heat exchanger, a refrigerant circuit in which a decompressor and an indoor heat exchanger are connected in a ring, and one end is connected to the discharge side of the compressor, and the other end is connected to the outdoor heat exchanger and the decompressor. A hot water supply heat exchanger connected to a refrigerant pipe between the two via an electric expansion valve, a hot water supply tank in which internal water is heated via the hot water supply heat exchanger, and water in the hot water supply tank In a heat pump water heater having a circulation pump circulating through an exchanger and a heater for heating water in the hot water tank, a temperature sensor for detecting a temperature of the water in the hot water tank and a temperature sensor for detecting the temperature of the water in the hot water tank A temperature discriminator for discriminating whether or not the temperature of the water in the hot water supply tank is equal to or lower than a predetermined temperature; and whether or not the water in the hot water supply tank can be heated via the hot water supply heat exchanger. Is determined based on the state of the refrigerant circuit. A heat pump water determination unit for a heater discriminator which the heater is determined whether energizable,
The temperature determining unit determines that the temperature of the water in the hot water tank is equal to or lower than the predetermined temperature, and the heat pump hot water determining unit heats the water in the hot water tank via the hot water heat exchanger. And a circulating pump control unit for operating the circulating pump when the heater determining unit determines that the heater cannot be energized.
【００１０】上記請求項３のヒートポンプ給湯機によれ
ば、冬季において、例えば、暖房運転中、外気温度が低
いときは、凝縮温度が低くなるため、ヒートポンプ給湯
運転を同時に行うことができなかったり、過負荷等によ
り過電流保護が働いて、ヒートポンプ給湯運転ができな
かったりするような状態に上記冷媒回路がある場合、さ
らに、上記給湯タンク内の水を加熱するヒータが通電で
きない故障が発生した場合、上記給湯タンク内の湯温を
保つことができず、給湯タンク内の水温が低下する。そ
して、上記温度判別部が給湯タンク内の水の温度が所定
温度(例えば凍結温度よりも１〜２℃高い温度)以下であ
ると判別し、かつ、上記冷媒回路の状態に基づいてヒー
トポンプ給湯判別部が給湯熱交換器を介して給湯タンク
内の水を加熱することができないと判別し、かつ、上記
ヒータ判別部がヒータが通電不能であると判別すると、
上記循環ポンプ制御部により循環ポンプを動作させて、
給湯タンク内の水を給湯熱交換器を介して循環させる。
そうすることによって、給湯タンク内の水を流動させ
て、凍結温度以下でも凍結しないようにする。したがっ
て、ヒートポンプやヒータが故障しても、循環ポンプを
運転することによって、給湯タンク内の水の凍結を防止
でき、信頼性を向上できる。According to the heat pump water heater of the third aspect, in winter, for example, during the heating operation, when the outside air temperature is low, the condensing temperature becomes low, so that the heat pump water heating operation cannot be performed simultaneously, When the refrigerant circuit is in a state where overcurrent protection is activated due to overload or the like and the heat pump hot water supply operation cannot be performed, and furthermore, when a failure occurs in which a heater for heating water in the hot water supply tank cannot be energized. However, the hot water temperature in the hot water tank cannot be maintained, and the water temperature in the hot water tank decreases. The temperature determining unit determines that the temperature of the water in the hot water supply tank is equal to or lower than a predetermined temperature (for example, a temperature higher by 1 to 2 ° C. than the freezing temperature), and determines whether the heat pump hot water is supplied based on the state of the refrigerant circuit. If the unit determines that the water in the hot water supply tank cannot be heated via the hot water supply heat exchanger, and the heater determination unit determines that the heater cannot be energized,
By operating the circulation pump by the circulation pump control unit,
The water in the hot water supply tank is circulated through the hot water supply heat exchanger.
By doing so, the water in the hot water supply tank is made to flow so that it does not freeze even at a temperature lower than the freezing temperature. Therefore, even if the heat pump or the heater breaks down, the freezing of water in the hot water supply tank can be prevented by operating the circulation pump, and the reliability can be improved.
【００１１】[0011]
【発明の実施の形態】以下、この発明のヒートポンプ給
湯機を図示の実施の形態により詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a heat pump water heater according to the present invention will be described in detail with reference to the illustrated embodiments.
【００１２】図１はこの発明の実施の一形態のヒートポ
ンプ給湯機の回路図である。このヒートポンプ給湯機
は、室外ユニット１,室内ユニット２および給湯タンク
ユニット３を備えている。上記室外ユニット１は、圧縮
機１１と、上記圧縮機１１の吐出側に接続された四路弁
１２と、上記四路弁１２に一端が接続された室外熱交換
器１３と、上記室外熱交換器１３の他端に一端が接続さ
れた電動膨張弁ＥＶ１とを有している。上記電動膨張弁
ＥＶ１の他端に減圧器としての電動膨張弁ＥＶ２の一端
を接続している。また、上記室外ユニット１の電動膨張
弁ＥＶ２の他端と室内ユニット２の室内熱交換器１４の
一端と接続している。上記室内ユニット２の室内熱交換
器１４の他端を室外ユニット１の四路弁１２,アキュム
レータ１７を介して圧縮機１１の吸入側に接続してい
る。また、上記圧縮機１１と四路弁１２との間の冷媒配
管３１に電磁弁２１を配設している。上記圧縮機１１,
室外熱交換器１３,電動膨張弁ＥＶ２および室内熱交換
器１４で冷媒回路を構成している。FIG. 1 is a circuit diagram of a heat pump water heater according to one embodiment of the present invention. The heat pump water heater includes an outdoor unit 1, an indoor unit 2, and a hot water tank unit 3. The outdoor unit 1 includes a compressor 11, a four-way valve 12 connected to the discharge side of the compressor 11, an outdoor heat exchanger 13 having one end connected to the four-way valve 12, and an outdoor heat exchanger. An electric expansion valve EV1 having one end connected to the other end of the vessel 13. One end of an electric expansion valve EV2 as a pressure reducing device is connected to the other end of the electric expansion valve EV1. The other end of the electric expansion valve EV2 of the outdoor unit 1 is connected to one end of the indoor heat exchanger 14 of the indoor unit 2. The other end of the indoor heat exchanger 14 of the indoor unit 2 is connected to the suction side of the compressor 11 via the four-way valve 12 and the accumulator 17 of the outdoor unit 1. Further, an electromagnetic valve 21 is disposed in a refrigerant pipe 31 between the compressor 11 and the four-way valve 12. The compressor 11,
The outdoor heat exchanger 13, the electric expansion valve EV2, and the indoor heat exchanger 14 constitute a refrigerant circuit.
【００１３】また、上記圧縮機１１の吐出側に給湯タン
クユニット３の二重管構造の給湯熱交換器１５の一端を
冷媒配管３４により接続して、その冷媒配管３４に電磁
弁２２を配設している。上記給湯熱交換器１５の他端を
電動膨張弁ＥＶ１と電動膨張弁ＥＶ２との間の冷媒配管
３２に電動膨張弁ＥＶ３を介して接続している。上記給
湯熱交換器１５の内管１５aの上端を給湯タンク１６の
中間位置に接続する一方、給湯熱交換器１５の内管１５
aの下端を給湯タンク１６の底に接続している。上記給
湯タンク１６内の湯を給湯熱交換器１５の内管１５aを
介して循環ポンプ１８により循環させる。上記給湯タン
ク１６内に加熱用のヒータ１９を配置すると共に、給湯
タンク１６内の水温を検出する温度センサ２３を、給湯
タンク１６内の水温が最も低くなる下部に配置してい
る。Further, one end of a hot water supply heat exchanger 15 having a double pipe structure of the hot water supply tank unit 3 is connected to a discharge side of the compressor 11 by a refrigerant pipe 34, and an electromagnetic valve 22 is disposed in the refrigerant pipe 34. doing. The other end of the hot water supply heat exchanger 15 is connected to a refrigerant pipe 32 between the electric expansion valve EV1 and the electric expansion valve EV2 via the electric expansion valve EV3. The upper end of the inner pipe 15a of the hot water supply heat exchanger 15 is connected to an intermediate position of the hot water supply tank 16, while the inner pipe 15 of the hot water supply heat exchanger 15 is connected.
The lower end of a is connected to the bottom of the hot water supply tank 16. The hot water in the hot water supply tank 16 is circulated by the circulation pump 18 via the inner pipe 15 a of the hot water supply heat exchanger 15. A heater 19 for heating is arranged in the hot water tank 16, and a temperature sensor 23 for detecting a water temperature in the hot water tank 16 is arranged at a lower portion where the water temperature in the hot water tank 16 is lowest.
【００１４】また、上記ヒートポンプ給湯機は、圧縮機
１１や電動膨張弁ＥＶ１,ＥＶ２,ＥＶ３等を制御する制
御装置１０を備えている。上記制御装置１０は、マイク
ロコンピュータと入出力回路等からなり、上記温度セン
サ２３により検出された給湯タンク１６内の水温が所定
温度(例えば１〜２℃)以下であるか否かを判別する温度
判別部１０aと、ヒートポンプ給湯が可能か否かを判別
するヒートポンプ給湯判別部１０bと、ヒータ１９に通
電可能か否かを判別するヒータ通電判別部１０cと、上
記循環ポンプ１８を運転する循環ポンプ制御部１０d
と、ヒータ１９の通電を制御するヒータ制御部１０eと
を有している。The heat pump water heater includes a control device 10 for controlling the compressor 11, the electric expansion valves EV1, EV2, EV3 and the like. The control device 10 includes a microcomputer, an input / output circuit, and the like, and determines whether the water temperature in the hot water supply tank 16 detected by the temperature sensor 23 is equal to or lower than a predetermined temperature (for example, 1 to 2 ° C.). A determination unit 10a, a heat pump hot water supply determination unit 10b that determines whether the heat pump hot water supply is possible, a heater power supply determination unit 10c that determines whether the heater 19 can be supplied with electricity, and a circulation pump control that operates the circulation pump 18 Part 10d
And a heater control unit 10e for controlling the energization of the heater 19.
【００１５】上記ヒートポンプ給湯機は、給湯運転を停
止した状態で暖房運転するときは、図１に示すように、
四路弁１２を点線の切換位置に切り換えて、電磁弁２１
を開く一方、電磁弁２２を閉じると共に、電動膨張弁Ｅ
Ｖ１を全開にし、電動膨張弁ＥＶ２を所定開度にし、電
動膨張弁ＥＶ３を閉じる。そして、上記圧縮機１１から
吐出された冷媒は、電磁弁２１,室内熱交換器１４,電動
膨張弁ＥＶ２,電動膨張弁ＥＶ１,室外熱交換器１３およ
びアキュムレータ１７の順に循環して、室内を暖房す
る。When the heat pump water heater performs a heating operation in a state where the hot water supply operation is stopped, as shown in FIG.
The four-way valve 12 is switched to the switching position indicated by the dotted line, and the solenoid valve 21 is switched.
While the solenoid valve 22 is closed and the electric expansion valve E
V1 is fully opened, the electric expansion valve EV2 is set to a predetermined opening, and the electric expansion valve EV3 is closed. The refrigerant discharged from the compressor 11 circulates in the order of the solenoid valve 21, the indoor heat exchanger 14, the electric expansion valve EV2, the electric expansion valve EV1, the outdoor heat exchanger 13, and the accumulator 17, thereby heating the room. I do.
【００１６】一方、暖房運転をサーモオフした状態で給
湯運転するときは、四路弁１２を点線の切換位置に切り
換えて、電磁弁２１を閉じる一方、電磁弁２２を開くと
共に、電動膨張弁ＥＶ１を全開にし、電動膨張弁ＥＶ２
を閉じ、電動膨張弁ＥＶ３を所定開度にする。そして、
上記圧縮機１１から吐出された冷媒は、電磁弁２２,給
湯熱交換器１５,電動膨張弁ＥＶ３,電動膨張弁ＥＶ１,
室外熱交換器１３およびアキュムレータ１７の順に循環
して、給湯タンク１６内の湯を沸かす。On the other hand, when the hot water supply operation is performed in a state in which the heating operation is thermo-off, the four-way valve 12 is switched to the switching position indicated by the dotted line to close the solenoid valve 21, open the solenoid valve 22, and switch the electric expansion valve EV1. Fully open the electric expansion valve EV2
Is closed, and the electric expansion valve EV3 is set to a predetermined opening degree. And
The refrigerant discharged from the compressor 11 is supplied to the electromagnetic valve 22, the hot water supply heat exchanger 15, the electric expansion valve EV3, the electric expansion valve EV1,
Circulating in the order of the outdoor heat exchanger 13 and the accumulator 17, the hot water in the hot water supply tank 16 is boiled.
【００１７】図２は上記制御装置１０の運転制御の処理
を示すフローチャートである。FIG. 2 is a flowchart showing the operation control process of the control device 10.
【００１８】以下、図２のフローチャートに従って上記
制御装置１０の動作について説明する。Hereinafter, the operation of the control device 10 will be described with reference to the flowchart of FIG.
【００１９】まず、処理がスタートすると、ステップＳ
１で温度判別部１０aにより水温が所定温度以下か否か
を判別する。そして、ステップＳ１で温度判別部１０a
が水温が所定温度以下であると判別すると、すなわち、
温度センサ２３により検出された給湯タンク１６内の水
温が所定温度以下であるとき、ステップＳ２に進む一
方、温度判別部１０aにより水温が所定温度を越えてい
ると判別すると、ステップＳ１を繰り返す。First, when the process starts, step S
In step 1, the temperature determining unit 10a determines whether the water temperature is equal to or lower than a predetermined temperature. Then, in step S1, the temperature determination unit 10a
Determines that the water temperature is equal to or lower than the predetermined temperature, that is,
When the water temperature in the hot water supply tank 16 detected by the temperature sensor 23 is equal to or lower than the predetermined temperature, the process proceeds to step S2, and when the temperature determining unit 10a determines that the water temperature exceeds the predetermined temperature, step S1 is repeated.
【００２０】次に、ステップＳ２で上記冷媒回路の状態
に基づいてヒートポンプ給湯判別部１０bによりヒート
ポンプ給湯運転が可能か否かを判別する。例えば、上記
ヒートポンプ給湯判別部１０bは、外気温度が低い暖房
運転中に、圧縮機１１の吐出管温度が低くいために、ヒ
ートポンプ給湯運転を同時に行うことができない場合
や、過負荷等により過電流保護が動作した場合、ヒート
ポンプ給湯運転ができないと判別するのである。そし
て、ステップＳ２でヒートポンプ給湯判別部１０bがヒ
ートポンプ給湯運転が可能であると判別すると、ステッ
プＳ３に進み、ヒートポンプ給湯運転による凍結防止を
行う。すなわち、上記圧縮機１１,給湯熱交換器１５,電
動膨張弁ＥＶ３,電動膨張弁膨張弁ＥＶ１および室外熱
交換器１３で構成されるヒートポンプにより給湯タンク
１６内の水を給湯熱交換器１５を介して加熱するのであ
る。このとき、上記循環ポンプ１８を運転して、給湯タ
ンク１６内の湯を給湯熱交換器１５を介して循環させ
る。そして、ヒートポンプ給湯運転による凍結防止の処
理が終了すると、ステップＳ１に戻る。Next, in step S2, the heat pump hot water supply determining section 10b determines whether or not the heat pump hot water supply operation is possible based on the state of the refrigerant circuit. For example, the heat pump hot water supply discriminating unit 10b performs overheat protection when the heat pump hot water supply operation cannot be performed simultaneously because the discharge pipe temperature of the compressor 11 is low during the heating operation when the outside air temperature is low, or when overload or the like. Is operated, it is determined that the heat pump hot water supply operation cannot be performed. Then, when the heat pump hot water supply determining section 10b determines that the heat pump hot water supply operation is possible in step S2, the process proceeds to step S3 to prevent freezing by the heat pump hot water supply operation. That is, the water in the hot water supply tank 16 is passed through the hot water supply heat exchanger 15 by the heat pump including the compressor 11, the hot water supply heat exchanger 15, the electric expansion valve EV3, the electric expansion valve expansion valve EV1, and the outdoor heat exchanger 13. And heat it. At this time, the circulation pump 18 is operated to circulate the hot water in the hot water supply tank 16 via the hot water supply heat exchanger 15. When the process of preventing freezing by the heat pump hot water supply operation ends, the process returns to step S1.
【００２１】一方、ステップＳ２でヒートポンプ給湯判
別部１０bがヒートポンプ給湯運転が不能であると判別
すると、ステップＳ４に進み、ヒータ判別部１０cによ
りヒータ１９が通電可能であるか否かを判別する。そう
して、ステップＳ４でヒータ判別部１０cによりヒータ
１９が通電可能であると判別すると、ステップＳ５に進
み、ヒータ通電による凍結防止を行う。例えば、上記温
度センサ２３により検出される給湯タンク１６内の水の
温度が所定温度よりも高い設定温度以上になるまで、ヒ
ータ１９に通電する。そして、ヒータ通電による凍結防
止の処理を終了すると、ステップＳ１に戻る。On the other hand, if the heat pump hot water supply determining unit 10b determines that the heat pump hot water supply operation cannot be performed in step S2, the process proceeds to step S4, where the heater determining unit 10c determines whether the heater 19 can be energized. Then, when it is determined in step S4 that the heater 19 can be energized by the heater determination unit 10c, the process proceeds to step S5, in which freezing is prevented by energizing the heater. For example, the heater 19 is energized until the temperature of the water in the hot water supply tank 16 detected by the temperature sensor 23 becomes equal to or higher than a set temperature higher than a predetermined temperature. When the process of preventing freezing by energizing the heater is completed, the process returns to step S1.
【００２２】一方、ステップＳ４でヒータ判別部１０c
によりヒータ１９が通電不能であると判別すると、ステ
ップＳ６に進み、循環ポンプ制御部１０dにより循環ポ
ンプ１８を運転して、循環ポンプ運転による凍結防止を
行う。上記循環ポンプ１８を運転することによって、給
湯タンク１６内の水を給湯熱交換器１５を介して循環さ
せる。そして、循環ポンプ運転による凍結防止の処理の
後、ステップＳ１に戻る。On the other hand, in step S4, the heater determining unit 10c
When it is determined that the heater 19 cannot be energized, the process proceeds to step S6, in which the circulation pump 18 is operated by the circulation pump control unit 10d to prevent freezing by operating the circulation pump. By operating the circulation pump 18, the water in the hot water supply tank 16 is circulated through the hot water supply heat exchanger 15. Then, after the freezing prevention process by the circulation pump operation, the process returns to step S1.
【００２３】上記構成のヒートポンプ給湯機において、
例えば冬季に、上記圧縮機１１,給湯熱交換器１５,電動
膨張弁ＥＶ３および室外熱交換器１３で構成されるヒー
トポンプが動作しない故障(圧縮機１１や電動膨張弁Ｅ
Ｖ３等の故障)が発生し、さらに、ヒータ１９が通電で
きない故障が発生した場合、給湯タンク１６内の湯温を
保つことができず、給湯タンク１６内の水温が低下す
る。そして、上記制御装置１０の温度判別部１０aが給
湯タンク１６内の水の温度が所定温度以下であると判別
し、かつ、ヒートポンプ給湯判別部１０bがヒートポン
プ給湯運転ができないと判別し、かつ、ヒータ判別部１
０cがヒータ１９が通電不能であると判別すると、循環
ポンプ制御部１０dにより循環ポンプ１８を動作させ
て、給湯タンク１６内の水を給湯熱交換器１５を介して
循環させる。そうして、上記給湯タンク１６内の水を流
動させることによって、凍結温度以下でも凍結しないよ
うにする。なお、上記ヒートポンプ給湯判別部１０bが
給湯熱交換器１５を介して給湯タンク１６内の水を加熱
することが可能であると判別した場合は、上記圧縮機１
１と循環ポンプ１８とを運転して、給湯タンク１６内の
水を給湯熱交換器１５を介して循環させ、圧縮機１１,
給湯熱交換器１５,電動膨張弁ＥＶ３および室外熱交換
器１３で構成されるヒートポンプにより給湯熱交換器１
５を介して給湯タンク１６内の水を加熱する。In the heat pump water heater having the above configuration,
For example, in winter, the heat pump including the compressor 11, the hot water supply heat exchanger 15, the electric expansion valve EV3, and the outdoor heat exchanger 13 does not operate (the compressor 11 and the electric expansion valve E3 do not operate).
If a failure occurs in which the heater 19 cannot be energized, the temperature of the hot water in the hot water supply tank 16 cannot be maintained, and the water temperature in the hot water supply tank 16 decreases. Then, the temperature determination unit 10a of the control device 10 determines that the temperature of the water in the hot water supply tank 16 is equal to or lower than a predetermined temperature, and the heat pump hot water supply determination unit 10b determines that the heat pump hot water supply operation cannot be performed. Discriminator 1
When 0c determines that the heater 19 cannot be energized, the circulation pump 18 is operated by the circulation pump control unit 10d to circulate the water in the hot water supply tank 16 via the hot water supply heat exchanger 15. Then, the water in the hot water supply tank 16 is caused to flow so as not to freeze even at a temperature lower than the freezing temperature. When the heat pump hot water supply determining unit 10b determines that the water in the hot water supply tank 16 can be heated through the hot water supply heat exchanger 15, the compressor 1
1 and the circulation pump 18 are operated to circulate the water in the hot water supply tank 16 through the hot water supply heat exchanger 15, and the compressor 11,
A hot water supply heat exchanger 1 is provided by a heat pump including a hot water supply heat exchanger 15, an electric expansion valve EV3, and an outdoor heat exchanger 13.
5, the water in the hot water supply tank 16 is heated.
【００２４】このように、ヒートポンプやヒータ１９が
故障しても、循環ポンプ１８を運転することによって、
給湯タンク１６内の水の凍結を防止でき、信頼性を向上
することができる。As described above, even if the heat pump or the heater 19 fails, by operating the circulation pump 18,
Freezing of water in the hot water supply tank 16 can be prevented, and reliability can be improved.
【００２５】上記実施の形態では、ヒータ通電が可能で
あるときは、ヒータ通電による凍結防止を行ったが、ヒ
ータ通電による凍結防止はなくともよい。その場合、温
度判別部が温度センサにより検出された給湯タンク内の
水温が所定温度以下であると判別し、かつヒートポンプ
給湯判別部がヒートポンプ給湯運転が不能であると判別
すると、循環ポンプ運転による凍結防止を行う。In the above embodiment, when energization of the heater is possible, the prevention of freezing by energizing the heater is performed. In this case, when the temperature determination unit determines that the water temperature in the hot water supply tank detected by the temperature sensor is equal to or lower than the predetermined temperature, and the heat pump hot water supply determination unit determines that the heat pump hot water supply operation cannot be performed, freezing by the circulation pump operation is performed. Perform prevention.
【００２６】また、上記実施の形態では、循環ポンプ運
転による凍結防止を行ったが、循環ポンプ運転による凍
結防止はなくともよい。Further, in the above embodiment, the prevention of freezing by the operation of the circulating pump is performed.
【００２７】また、上記実施の形態では、上記四路弁１
２を切り換えて、冷暖房運転を行うヒートポンプ給湯機
について説明したが、四路弁のない暖房運転と給湯運転
を行うヒートポンプ給湯機についてこの発明を適用して
もよい。In the above embodiment, the four-way valve 1
Although the heat pump water heater that performs the cooling and heating operation by switching 2 has been described, the present invention may be applied to a heat pump water heater that performs the heating operation and the hot water supply operation without the four-way valve.
【００２８】さらに、上記実施の形態では、減圧器とし
て開度調整可能な電動膨張弁ＥＶ２を用いたが、開度が
一定の減圧器を用いてもよい。Further, in the above embodiment, the motor-operated expansion valve EV2 whose opening can be adjusted is used as the pressure reducing device, but a pressure reducing device having a constant opening may be used.
【００２９】なお、この発明のヒートポンプ給湯機にお
ける室内ユニットの数や給湯熱交換器の構造は、上記実
施の形態に限定されない。The number of indoor units and the structure of the hot water supply heat exchanger in the heat pump water heater of 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の発
明のヒートポンプ給湯機は、圧縮機,室外熱交換器,減圧
器および室内熱交換器が環状に接続された冷媒回路と、
上記圧縮機の吐出側に一端が接続され、他端が室外熱交
換器と減圧器との間の冷媒配管に電動膨張弁を介して接
続された給湯熱交換器と、上記給湯熱交換器を介して内
部の水が加熱される給湯タンクと、上記給湯タンク内の
水を給湯熱交換器を介して循環させる循環ポンプとを備
えたヒートポンプ給湯機において、温度判別部が温度セ
ンサにより検出された給湯タンク内の水の温度が所定温
度以下であると判別し、かつ、ヒートポンプ給湯判別部
が上記冷媒回路の状態に基づいて給湯熱交換器を介して
給湯タンク内の水を加熱することができないと判別する
と、循環ポンプ制御部により循環ポンプを動作させるも
のである。As is apparent from the above description, the heat pump water heater according to the first aspect of the present invention comprises a refrigerant circuit in which a compressor, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger are connected in a ring.
One end is connected to the discharge side of the compressor, and the other end is connected to a refrigerant pipe between the outdoor heat exchanger and the pressure reducer via an electric expansion valve, and the hot water supply heat exchanger. In a heat pump water heater provided with a hot water supply tank in which the water inside is heated via a hot water supply tank and a circulation pump for circulating the water in the hot water supply tank through a hot water supply heat exchanger, a temperature sensor detects a temperature discriminator. The temperature of the water in the hot water supply tank is determined to be equal to or lower than the predetermined temperature, and the heat pump hot water supply determination unit cannot heat the water in the hot water supply tank via the hot water supply heat exchanger based on the state of the refrigerant circuit. Is determined, the circulating pump is operated by the circulating pump control unit.
【００３１】したがって、請求項１の発明のヒートポン
プ給湯機によれば、冬季に、ヒートポンプの故障により
給湯タンク内の湯温を保つことができず、給湯タンク内
の水温が低下して、上記温度判別部が給湯タンク内の水
の温度が例えば凍結温度よりも１〜２℃高い所定温度以
下であると判別し、かつ、上記ヒートポンプ給湯判別部
が給湯熱交換器を介して給湯タンク内の水を加熱するこ
とができないと判別すると、上記循環ポンプ制御部によ
り循環ポンプを動作させて、給湯タンク内の水を給湯熱
交換器を介して循環させて、給湯タンク内の水を流動さ
せて、凍結温度以下でも凍結しないようにするので、ヒ
ートポンプが故障しても、給湯タンク内の水の凍結を防
止でき、信頼性を向上することができる。Therefore, according to the heat pump water heater of the first aspect of the present invention, the temperature of the hot water in the hot water supply tank cannot be maintained due to the failure of the heat pump in winter, and the temperature of the water in the hot water supply tank decreases. The determination unit determines that the temperature of the water in the hot water supply tank is equal to or lower than a predetermined temperature that is higher than the freezing temperature by 1 to 2 ° C., for example, and the heat pump hot water supply determination unit determines the water in the hot water supply tank via the hot water supply heat exchanger. When it is determined that the water cannot be heated, the circulation pump is operated by the circulation pump control unit, the water in the hot water supply tank is circulated through the hot water supply heat exchanger, and the water in the hot water supply tank is caused to flow, Since freezing is prevented even at a freezing temperature or less, even if the heat pump fails, water in the hot water supply tank can be prevented from freezing, and reliability can be improved.
【００３２】また、請求項２の発明のヒートポンプ給湯
機は、圧縮機,室外熱交換器,減圧器および室内熱交換器
が環状に接続された冷媒回路と、上記圧縮機の吐出側に
一端が接続され、他端が室外熱交換器と減圧器との間の
冷媒配管に電動膨張弁を介して接続された給湯熱交換器
と、上記給湯熱交換器を介して内部の水が加熱される給
湯タンクと、上記給湯タンク内の水を給湯熱交換器を介
して循環させる循環ポンプと、上記給湯タンク内の水を
加熱するヒータとを備えたヒートポンプ給湯機におい
て、温度判別部が温度センサにより検出された給湯タン
ク内の水の温度が所定温度以下であると判別し、かつ、
ヒートポンプ給湯判別部が上記冷媒回路の状態に基づい
て給湯熱交換器を介して給湯タンク内の水を加熱するこ
とができないと判別すると、ヒータ制御部によりヒータ
に通電させるものである。A heat pump water heater according to a second aspect of the present invention includes a refrigerant circuit in which a compressor, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger are connected in an annular shape, and one end on the discharge side of the compressor. A hot water supply heat exchanger connected via a motor-operated expansion valve to a refrigerant pipe between the outdoor heat exchanger and the decompressor, the other end of which is heated through the hot water supply heat exchanger In a heat pump water heater including a hot water supply tank, a circulation pump for circulating water in the hot water supply tank through a hot water supply heat exchanger, and a heater for heating water in the hot water supply tank, a temperature determination unit detects a temperature by a temperature sensor. It is determined that the detected temperature of the water in the hot water supply tank is equal to or lower than a predetermined temperature, and
When the heat pump hot water supply determining unit determines that the water in the hot water supply tank cannot be heated via the hot water supply heat exchanger based on the state of the refrigerant circuit, the heater control unit supplies electricity to the heater.
【００３３】したがって、請求項２の発明のヒートポン
プ給湯機によれば、冬季に、ヒートポンプの故障により
給湯タンク内の湯温を保つことができず、給湯タンク内
の水温が低下して、上記温度判別部が給湯タンク内の水
の温度が凍結温度よりも１〜２℃高い所定温度以下であ
ると判別し、かつ、上記ヒートポンプ給湯判別部が給湯
熱交換器を介して給湯タンク内の水を加熱することがで
きないと判別すると、上記ヒータ制御部により上記ヒー
タに通電させて、給湯タンク内の水を加熱することによ
って、給湯タンク内の水を温めて、凍結しないようにす
るので、ヒートポンプが故障しても、給湯タンク内の水
の凍結を防止でき、信頼性を向上することができる。Therefore, according to the heat pump water heater of the second aspect of the present invention, the temperature of the hot water in the hot water supply tank cannot be maintained due to the failure of the heat pump in winter, and the temperature of the water in the hot water supply tank decreases. The determining unit determines that the temperature of the water in the hot water supply tank is equal to or lower than a predetermined temperature that is higher than the freezing temperature by 1 to 2 ° C., and the heat pump hot water supply determining unit determines the water in the hot water supply tank via the hot water supply heat exchanger. If it is determined that the heating cannot be performed, the heater control unit turns on the heater to heat the water in the hot water tank, thereby heating the water in the hot water tank and preventing the water from freezing. Even if a failure occurs, freezing of water in the hot water supply tank can be prevented, and reliability can be improved.
【００３４】また、請求項３の発明のヒートポンプ給湯
機は、圧縮機,室外熱交換器,減圧器および室内熱交換器
が環状に接続された冷媒回路と、上記圧縮機の吐出側に
一端が接続され、他端が室外熱交換器と減圧器との間の
冷媒配管に電動膨張弁を介して接続された給湯熱交換器
と、上記給湯熱交換器を介して内部の水が加熱される給
湯タンクと、上記給湯タンク内の水を給湯熱交換器を介
して循環させる循環ポンプと、上記給湯タンク内の水を
加熱するヒータとを備えたヒートポンプ給湯機におい
て、温度判別部が温度センサにより検出された給湯タン
ク内の水の温度が所定温度以下であると判別し、かつ、
ヒートポンプ給湯判別部が上記冷媒回路の状態に基づい
て給湯熱交換器を介して給湯タンク内の水を加熱するこ
とができないと判別し、かつ、ヒータ判別部がヒータが
通電不能であると判別すると、循環ポンプ制御部により
循環ポンプを動作させるものである。A heat pump water heater according to a third aspect of the present invention includes a refrigerant circuit in which a compressor, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger are connected in a ring, and one end of which is provided on the discharge side of the compressor. A hot water supply heat exchanger connected via a motor-operated expansion valve to a refrigerant pipe between the outdoor heat exchanger and the decompressor, the other end of which is heated through the hot water supply heat exchanger In a heat pump water heater including a hot water supply tank, a circulation pump for circulating water in the hot water supply tank through a hot water supply heat exchanger, and a heater for heating water in the hot water supply tank, a temperature determination unit detects a temperature by a temperature sensor. It is determined that the detected temperature of the water in the hot water supply tank is equal to or lower than a predetermined temperature, and
When the heat pump hot water supply determination unit determines that the water in the hot water supply tank cannot be heated via the hot water supply heat exchanger based on the state of the refrigerant circuit, and the heater determination unit determines that the heater cannot be energized. The circulating pump is operated by the circulating pump control unit.
【００３５】したがって、請求項３の発明のヒートポン
プ給湯機によれば、冬季に、ヒートポンプが故障し、さ
らに、上記ヒータが故障した場合、上記給湯タンク内の
湯温を保つことができず、給湯タンク内の水温が低下し
て、上記温度判別部が給湯タンク内の水の温度が凍結温
度よりも１〜２℃高い所定温度以下であると判別し、か
つ、上記ヒートポンプ給湯判別部が給湯熱交換器を介し
て給湯タンク内の水を加熱することができない判別し、
かつ、上記ヒータ判別部がヒータが通電不能であると判
別すると、上記循環ポンプ制御部により循環ポンプを動
作させて、給湯タンク内の水を給湯熱交換器を介して循
環させることによって、給湯タンク内の水を流動させ
て、凍結温度以下でも凍結しないようにするので、ヒー
トポンプやヒータが故障しても、給湯タンク内の水の凍
結を防止でき、信頼性を向上することができる。Therefore, according to the heat pump water heater according to the third aspect of the present invention, when the heat pump fails in winter and the heater fails, the temperature of the hot water in the hot water supply tank cannot be maintained. The temperature of the water in the tank decreases, the temperature determination unit determines that the temperature of the water in the hot water supply tank is equal to or lower than a predetermined temperature that is higher than the freezing temperature by 1 to 2 ° C., and the heat pump hot water supply determination unit determines the hot water supply heat. Determines that the water in the hot water tank cannot be heated through the exchanger,
When the heater determining unit determines that the heater is not energized, the circulating pump is operated by the circulating pump control unit to circulate the water in the hot water supply tank through the hot water supply heat exchanger. The water in the hot water supply tank is prevented from freezing even at a temperature lower than the freezing temperature by flowing the water therein, so that even if the heat pump or the heater fails, the water in the hot water supply tank can be prevented from freezing, and the reliability can be improved.
【図１】 図１はこの発明の実施の一形態のヒートポン
プ給湯機の回路図である。FIG. 1 is a circuit diagram of a heat pump water heater according to one embodiment of the present invention.
【図２】 図２は上記ヒートポンプ給湯機の制御装置の
処理を示すフローチャートである。FIG. 2 is a flowchart showing a process of a control device of the heat pump water heater.
１…室外ユニット、２…室内ユニット、３…給湯タンク
ユニット、１０…制御装置、１０a…温度判別部、１０b
…ヒートポンプ給湯判別部、１０c…ヒータ判別部、１
０d…循環ポンプ制御部、１０e…ヒータ制御部、１１…
圧縮機、１２…四路弁、１３…室外熱交換器、１４…室
内熱交換器、１５…給湯熱交換器、１６…給湯タンク、
１７…アキュムレータ、１８…循環ポンプ、１９…ヒー
タ、２１,２２…電磁弁、２３…温度センサ、ＥＶ１,Ｅ
Ｖ２,ＥＶ３…電動膨張弁。DESCRIPTION OF SYMBOLS 1 ... Outdoor unit, 2 ... Indoor unit, 3 ... Hot water supply tank unit, 10 ... Control device, 10a ... Temperature discrimination part, 10b
... Heat pump hot water supply discriminator, 10c ... Heater discriminator, 1
0d: circulation pump controller, 10e: heater controller, 11 ...
Compressor: 12: four-way valve, 13: outdoor heat exchanger, 14: indoor heat exchanger, 15: hot water supply heat exchanger, 16: hot water supply tank,
17 accumulator, 18 circulation pump, 19 heater, 21, 22 solenoid valve, 23 temperature sensor, EV1, E
V2, EV3: Electric expansion valves.
Claims (3)
器(ＥＶ２)および室内熱交換器(１４)が環状に接続され
た冷媒回路と、上記圧縮機(１１)の吐出側に一端が接続
され、他端が上記室外熱交換器(１３)と上記減圧器(Ｅ
Ｖ２)との間の冷媒配管(３２)に電動膨張弁(ＥＶ３)を
介して接続された給湯熱交換器(１５)と、上記給湯熱交
換器(１５)を介して内部の水が加熱される給湯タンク
(１６)と、上記給湯タンク(１６)内の水を上記給湯熱交
換器(１５)を介して循環させる循環ポンプ(１８)とを備
えたヒートポンプ給湯機において、 上記給湯タンク(１６)内の水の温度を検出する温度セン
サ(２３)と、 上記温度センサ(２３)により検出された上記給湯タンク
(１６)内の水の温度が所定温度以下であるか否かを判別
する温度判別部(１０a)と、 上記給湯熱交換器(１５)を介して上記給湯タンク(１６)
内の水を加熱することが可能か否かを上記冷媒回路の状
態に基づいて判別するヒートポンプ給湯判別部(１０b)
と、 上記温度判別部(１０a)が上記給湯タンク(１６)内の水
の温度が上記所定温度以下であると判別し、かつ、上記
ヒートポンプ給湯判別部(１０b)が上記給湯熱交換器(１
５)を介して上記給湯タンク(１６)内の水を加熱するこ
とができないと判別すると、上記循環ポンプ(１８)を動
作させる循環ポンプ制御部(１０d)とを備えたことを特
徴とするヒートポンプ給湯機。1. A refrigerant circuit in which a compressor (11), an outdoor heat exchanger (13), a pressure reducer (EV2) and an indoor heat exchanger (14) are connected in a ring shape, and a discharge of the compressor (11). The other end is connected to the outdoor heat exchanger (13) and the pressure reducer (E
V2) and the internal water is heated via the hot water supply heat exchanger (15) connected to the refrigerant pipe (32) via the electric expansion valve (EV3). Hot water tank
(16) and a circulation pump (18) for circulating water in the hot water supply tank (16) through the hot water supply heat exchanger (15). A temperature sensor (23) for detecting the temperature of water, and the hot water supply tank detected by the temperature sensor (23)
(16) a temperature determining unit (10a) for determining whether the temperature of water in the hot water supply tank is lower than a predetermined temperature; and a hot water supply tank (16) via the hot water supply heat exchanger (15).
Heat pump hot water supply discriminating unit (10b) for discriminating whether or not the water in the tank can be heated based on the state of the refrigerant circuit
The temperature determination unit (10a) determines that the temperature of the water in the hot water supply tank (16) is equal to or lower than the predetermined temperature, and the heat pump hot water supply determination unit (10b) determines that the hot water supply heat exchanger (1
A heat pump provided with a circulating pump control unit (10d) for operating the circulating pump (18) when it is determined that the water in the hot water supply tank (16) cannot be heated via 5). Water heater.
器(ＥＶ２)および室内熱交換器(１４)が環状に接続され
た冷媒回路と、上記圧縮機(１１)の吐出側に一端が接続
され、他端が上記室外熱交換器(１３)と上記減圧器(Ｅ
Ｖ２)との間の冷媒配管(３２)に電動膨張弁(ＥＶ３)を
介して接続された給湯熱交換器(１５)と、上記給湯熱交
換器(１５)を介して内部の水が加熱される給湯タンク
(１６)と、上記給湯タンク(１６)内の水を上記給湯熱交
換器(１５)を介して循環させる循環ポンプ(１８)と、上
記給湯タンク(１６)内の水を加熱するヒータ(１９)とを
備えたヒートポンプ給湯機において、 上記給湯タンク(１６)内の水の温度を検出する温度セン
サ(２３)と、 上記温度センサ(２３)により検出された上記給湯タンク
(１６)内の水の温度が所定温度以下であるか否かを判別
する温度判別部(１０a)と、 上記給湯熱交換器(１５)を介して上記給湯タンク(１６)
内の水を加熱することが可能か否かを上記冷媒回路の状
態に基づいて判別するヒートポンプ給湯判別部(１０b)
と、 上記温度判別部(１０a)が上記給湯タンク(１６)内の水
の温度が上記所定温度以下であると判別し、かつ、上記
ヒートポンプ給湯判別部(１０b)が上記給湯熱交換器(１
５)を介して上記給湯タンク(１６)内の水を加熱するこ
とができないと判別すると、上記ヒータ(１９)に通電さ
せるヒータ制御部(１０e)とを備えたことを特徴とする
ヒートポンプ給湯機。2. A refrigerant circuit in which a compressor (11), an outdoor heat exchanger (13), a pressure reducer (EV2), and an indoor heat exchanger (14) are connected in a ring shape, and a discharge of the compressor (11). The other end is connected to the outdoor heat exchanger (13) and the pressure reducer (E
V2) and the internal water is heated via the hot water supply heat exchanger (15) connected to the refrigerant pipe (32) via the electric expansion valve (EV3). Hot water tank
(16), a circulation pump (18) for circulating water in the hot water supply tank (16) through the hot water supply heat exchanger (15), and a heater (19) for heating water in the hot water supply tank (16). ), A temperature sensor (23) for detecting a temperature of water in the hot water tank (16), and the hot water tank detected by the temperature sensor (23).
(16) a temperature determining unit (10a) for determining whether the temperature of water in the hot water supply tank is lower than a predetermined temperature; and a hot water supply tank (16) via the hot water supply heat exchanger (15).
Heat pump hot water supply discriminating unit (10b) for discriminating whether or not the water in the tank can be heated based on the state of the refrigerant circuit
The temperature determination unit (10a) determines that the temperature of the water in the hot water supply tank (16) is equal to or lower than the predetermined temperature, and the heat pump hot water supply determination unit (10b) determines that the hot water supply heat exchanger (1
And a heater control unit (10e) for energizing the heater (19) when it is determined that the water in the hot water supply tank (16) cannot be heated via the hot water supply tank (5). .
器(ＥＶ２)および室内熱交換器(１４)が環状に接続され
た冷媒回路と、上記圧縮機(１１)の吐出側に一端が接続
され、他端が上記室外熱交換器(１３)と上記減圧器(Ｅ
Ｖ２)との間の冷媒配管(３２)に電動膨張弁(ＥＶ３)を
介して接続された給湯熱交換器(１５)と、上記給湯熱交
換器(１５)を介して内部の水が加熱される給湯タンク
(１６)と、上記給湯タンク(１６)内の水を上記給湯熱交
換器(１５)を介して循環させる循環ポンプ(１８)と、上
記給湯タンク(１６)内の水を加熱するヒータ(１９)とを
備えたヒートポンプ給湯機において、 上記給湯タンク(１６)内の水の温度を検出する温度セン
サ(２３)と、 上記温度センサ(２３)により検出された上記給湯タンク
(１６)内の水の温度が所定温度以下であるか否かを判別
する温度判別部(１０a)と、 上記給湯熱交換器(１５)を介して上記給湯タンク(１６)
内の水を加熱することが可能か否かを上記冷媒回路の状
態に基づいて判別するヒートポンプ給湯判別部(１０b)
と、 上記ヒータ(１９)が通電可能か否かを判別するヒータ判
別部(１０c)と、 上記温度判別部(１０a)が上記給湯タンク(１６)内の水
の温度が上記所定温度以下であると判別し、かつ、上記
ヒートポンプ給湯判別部(１０b)が上記給湯熱交換器(１
５)を介して上記給湯タンク(１６)内の水を加熱するこ
とができないと判別し、かつ、上記ヒータ判別部(１０
c)が上記ヒータ(１９)が通電不能であると判別すると、
上記循環ポンプ(１８)を動作させる循環ポンプ制御部
(１０d)とを備えたことを特徴とするヒートポンプ給湯
機。3. A refrigerant circuit in which a compressor (11), an outdoor heat exchanger (13), a decompressor (EV2) and an indoor heat exchanger (14) are connected in a ring shape, and a discharge of the compressor (11). The other end is connected to the outdoor heat exchanger (13) and the pressure reducer (E
V2) and the internal water is heated via the hot water supply heat exchanger (15) connected to the refrigerant pipe (32) via the electric expansion valve (EV3). Hot water tank
(16), a circulation pump (18) for circulating water in the hot water supply tank (16) through the hot water supply heat exchanger (15), and a heater (19) for heating water in the hot water supply tank (16). ), A temperature sensor (23) for detecting a temperature of water in the hot water tank (16), and the hot water tank detected by the temperature sensor (23).
(16) a temperature determining unit (10a) for determining whether the temperature of water in the hot water supply tank is lower than a predetermined temperature; and a hot water supply tank (16) via the hot water supply heat exchanger (15).
Heat pump hot water supply discriminating unit (10b) for discriminating whether or not the water in the tank can be heated based on the state of the refrigerant circuit
A heater discriminator (10c) for discriminating whether or not the heater (19) can be energized; and a temperature discriminator (10a) for judging that the temperature of the water in the hot water supply tank (16) is equal to or lower than the predetermined temperature. And the heat pump hot water supply determining section (10b) determines that the hot water supply heat exchanger (1
5) that the water in the hot water supply tank (16) cannot be heated, and the heater determination unit (10)
When c) determines that the heater (19) is not energized,
A circulating pump controller for operating the circulating pump (18)
(10d) A heat pump water heater comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21506497A JP2897762B2 (en) | 1997-08-08 | 1997-08-08 | Heat pump water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21506497A JP2897762B2 (en) | 1997-08-08 | 1997-08-08 | Heat pump water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1163661A true JPH1163661A (en) | 1999-03-05 |
| JP2897762B2 JP2897762B2 (en) | 1999-05-31 |
Family
ID=16666164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21506497A Expired - Fee Related JP2897762B2 (en) | 1997-08-08 | 1997-08-08 | Heat pump water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2897762B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003042606A1 (en) * | 2001-11-13 | 2003-05-22 | Daikin Industries, Ltd. | Heat pump type hot water supply device |
| WO2003064935A1 (en) * | 2002-01-29 | 2003-08-07 | Daikin Industries, Ltd. | Heat pump type water heater |
| JP2005030641A (en) * | 2003-07-09 | 2005-02-03 | Chofu Seisakusho Co Ltd | Outdoor machine for air conditioner with hot water floor heater |
| WO2005047781A1 (en) * | 2003-11-17 | 2005-05-26 | Quantum Energy Technologies Pty Limited | Heat pump system for hot water and/or space cooling and/or heating |
| US7155922B2 (en) | 2001-12-12 | 2007-01-02 | Quantum Energy Technologies Pty Limited | Energy efficient heat pump systems for water heating and air conditioning |
| JP2007127307A (en) * | 2005-11-01 | 2007-05-24 | Ebara Refrigeration Equipment & Systems Co Ltd | Refrigerating machine and its operation method |
| JP2010133610A (en) * | 2008-12-03 | 2010-06-17 | Sharp Corp | Heat pump water heater system |
| JP2014109422A (en) * | 2012-12-04 | 2014-06-12 | Rinnai Corp | Hot water system |
| JP2014173766A (en) * | 2013-03-07 | 2014-09-22 | Noritz Corp | Heat source machine |
| WO2017203655A1 (en) | 2016-05-26 | 2017-11-30 | 三菱電機株式会社 | Heat pump type air conditioning and hot water supplying device |
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1997
- 1997-08-08 JP JP21506497A patent/JP2897762B2/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7228695B2 (en) | 2001-11-13 | 2007-06-12 | Daikin Industries, Ltd. | Heat pump type hot water supply device |
| WO2003042606A1 (en) * | 2001-11-13 | 2003-05-22 | Daikin Industries, Ltd. | Heat pump type hot water supply device |
| US7155922B2 (en) | 2001-12-12 | 2007-01-02 | Quantum Energy Technologies Pty Limited | Energy efficient heat pump systems for water heating and air conditioning |
| WO2003064935A1 (en) * | 2002-01-29 | 2003-08-07 | Daikin Industries, Ltd. | Heat pump type water heater |
| US7883024B2 (en) | 2002-01-29 | 2011-02-08 | Daikin Industries, Ltd. | Heat pump type water heater |
| JP4502605B2 (en) * | 2003-07-09 | 2010-07-14 | 株式会社長府製作所 | Air conditioner outdoor unit with heated floor heating |
| JP2005030641A (en) * | 2003-07-09 | 2005-02-03 | Chofu Seisakusho Co Ltd | Outdoor machine for air conditioner with hot water floor heater |
| WO2005047781A1 (en) * | 2003-11-17 | 2005-05-26 | Quantum Energy Technologies Pty Limited | Heat pump system for hot water and/or space cooling and/or heating |
| JP2007127307A (en) * | 2005-11-01 | 2007-05-24 | Ebara Refrigeration Equipment & Systems Co Ltd | Refrigerating machine and its operation method |
| JP2010133610A (en) * | 2008-12-03 | 2010-06-17 | Sharp Corp | Heat pump water heater system |
| JP2014109422A (en) * | 2012-12-04 | 2014-06-12 | Rinnai Corp | Hot water system |
| WO2014087701A1 (en) * | 2012-12-04 | 2014-06-12 | リンナイ株式会社 | Hot-water supply system |
| CN104797890A (en) * | 2012-12-04 | 2015-07-22 | 林内株式会社 | Hot-water supply system |
| JP2014173766A (en) * | 2013-03-07 | 2014-09-22 | Noritz Corp | Heat source machine |
| WO2017203655A1 (en) | 2016-05-26 | 2017-11-30 | 三菱電機株式会社 | Heat pump type air conditioning and hot water supplying device |
| US10816224B2 (en) | 2016-05-26 | 2020-10-27 | Mitsubishi Electric Corporation | Heat-pump air-conditioning hot-water supply device |
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| Publication number | Publication date |
|---|---|
| JP2897762B2 (en) | 1999-05-31 |
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