JP4898368B2 - Heat pump water heater - Google Patents

Heat pump water heater Download PDF

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JP4898368B2
JP4898368B2 JP2006255501A JP2006255501A JP4898368B2 JP 4898368 B2 JP4898368 B2 JP 4898368B2 JP 2006255501 A JP2006255501 A JP 2006255501A JP 2006255501 A JP2006255501 A JP 2006255501A JP 4898368 B2 JP4898368 B2 JP 4898368B2
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hot water
heat pump
water
refrigerant
storage tank
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JP2008075958A (en
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真典 上田
亮 荒木
雄志 加勢
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Corona Corp
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Description

この発明は、ヒートポンプ式給湯機の停電等による給電停止時の凍結防止に関するものである。   The present invention relates to prevention of freezing when power supply is stopped due to a power failure or the like of a heat pump type hot water heater.

従来からヒートポンプによって水を温め貯湯タンクに貯湯するヒートポンプ式給湯機が使用されている。ここで外部の温度が低下した時に、ヒートポンプと貯湯タンクとを接続する循環配管内および冷媒−水熱交換器内に残留する湯水が冷えて凍結することを防止するために、循環配管にヒータを設置することが実施されている。その一方で循環ポンプを運転して湯水を循環させることで凍結防止を行うようにしているものがあった。（例えば、特許文献１参照。）
２００２−０４８３９９号公報 2. Description of the Related Art Conventionally, a heat pump type water heater that warms water with a heat pump and stores it in a hot water storage tank has been used. Here, in order to prevent the hot water remaining in the circulation pipe connecting the heat pump and the hot water storage tank and the refrigerant-water heat exchanger from cooling and freezing when the external temperature decreases, a heater is installed in the circulation pipe. Installation is carried out. On the other hand, there is one that operates a circulation pump to circulate hot water and water to prevent freezing. (For example, refer to Patent Document 1.)
No. 2002-048399

ところでこの従来のものは停電等の給電停止により電源が途切れた場合、循環配管に配置したヒータの作動や循環ポンプを運転して湯水を循環させる凍結防止運転は不可能となり、外気温度が氷点下である時に給電が停止した場合には、ヒートポンプと貯湯タンクとを接続する循環配管内および冷媒−水熱交換器の水通路内に残留する湯水が冷えて凍結するおそれがあると言う大きな問題点を有するものであった。   By the way, in this conventional system, when the power supply is interrupted due to power interruption such as a power failure, the operation of the heater arranged in the circulation pipe and the freeze prevention operation that circulates hot water by operating the circulation pump becomes impossible, and the outside air temperature is below freezing point. If power supply is stopped at a certain time, there is a big problem that the hot water remaining in the circulation pipe connecting the heat pump and the hot water storage tank and the water passage of the refrigerant-water heat exchanger may be cooled and frozen. I had it.

この発明は上記課題を解決するために、入水管と出湯管が接続され湯水を貯湯する貯湯タンクと、該貯湯タンク内の湯水を加熱するヒートポンプ式加熱手段と、前記貯湯タンクと前記ヒートポンプ式加熱手段内に収納される冷媒−水熱交換器とを湯水が循環可能に接続し、前記貯湯タンク内の湯水を前記冷媒−水熱交換器に供給するヒーポン往き管と前記冷媒−水熱交換器で熱交換された湯水を前記貯湯タンクに戻すヒーポン戻り管とから構成されるヒーポン循環回路と、該ヒーポン循環回路に設けられ湯水を循環させるヒーポン循環ポンプとを備えたヒートポンプ式給湯機に於いて、前記ヒーポン往き管に設けられ給電時は開弁し給電停止時には閉弁する流出防止手段と、前記ヒーポン戻り管に設けられ前記貯湯タンクから前記冷媒−水熱交換器側への湯水の逆流を阻止する逆止弁と、前記流出防止手段よりも下流側且つ前記逆止弁よりも上流側にある前記ヒートポンプ式加熱手段内の前記ヒーポン循環回路または前記冷媒−水熱交換器を構成する水通路の中で、高さ位置が最下部となる位置に、給電時は排水路を閉弁し給電停止時には排水路を開弁する開閉手段とを備え、給電停止時には、前記開閉手段が排水路を開弁すると共に、前記流出防止手段が閉弁し、前記ヒートポンプ式加熱手段内の前記ヒーポン循環回路内および前記冷媒−水熱交換器を構成する水通路内の湯水を排水すると共に、前記貯湯タンクからの湯水の流出を防ぐものとした。
In order to solve the above-described problems, the present invention provides a hot water storage tank that stores hot water by connecting a water inlet pipe and a hot water discharge pipe, heat pump heating means that heats hot water in the hot water storage tank, the hot water storage tank, and the heat pump heating. A refrigerant-water heat exchanger housed in the means is connected so that hot water can circulate , and a heat pump forward pipe for supplying hot water in the hot water storage tank to the refrigerant-water heat exchanger and the refrigerant-water heat exchanger In a heat pump type hot water heater comprising a heat pump circulation circuit comprising a heat pump return pipe for returning hot water exchanged in the above to the hot water storage tank , and a heat pump circulation pump provided in the heat pump circulation circuit for circulating hot water. the Hipon forward power feeding provided on tube and outflow preventing means for closing at the time of valve opening and feeding stops, the refrigerant from the hot water storage tank is provided in the Hipon return pipe - hydrothermal A check valve for preventing back flow of hot water to the converter side, and the heat pump circulation circuit or the refrigerant in the heat pump heating means located downstream of the outflow prevention means and upstream of the check valve among the water passage constituting the water heat exchanger, to a position where the height position becomes the bottom, when the feed is at closes the drainage feed stop and a closing means for opening the drain passage, the feed stop Sometimes, the opening / closing means opens the drainage channel, and the outflow prevention means closes, in the heat pump circulation circuit in the heat pump heating means and in the water passage constituting the refrigerant-water heat exchanger. The hot water was drained and the outflow of hot water from the hot water storage tank was prevented .

この発明によれば、停電等で給電停止した場合には、流出防止手段よりも下流側且つ逆止弁よりも上流側にあるヒートポンプ式加熱手段内のヒーポン循環回路または冷媒−水熱交換器を構成する水通路の中で、高さ位置が最下部となる位置に備えた開閉手段が排水路を開弁することで、ヒートポンプ式加熱手段内のヒーポン循環回路内および冷媒−水熱交換器の水通路内に残留する湯水を排水でき、さらに、流出防止手段の閉弁とヒーポン戻り管に設けられ貯湯タンクから冷媒−水熱交換器側への湯水の逆流を阻止する逆止弁によって、貯湯タンク内の湯水の流出を防ぎ、もし外気温度が氷点下である時に停電等で給電停止した場合でも、ヒートポンプ式加熱手段内のヒーポン循環回路内および冷媒−水熱交換器の水通路内に残留する湯水の排水を行い凍結を防止することができると共に、貯湯タンク内の湯水を無駄に流出することがないものである。 According to this invention, when the power supply is stopped due to a power failure or the like, the heat pump circulation circuit or the refrigerant-water heat exchanger in the heat pump type heating means located downstream from the outflow prevention means and upstream from the check valve is provided. Opening / closing means provided at a position where the height position is at the lowest position in the water passage constituting the valve opens the drainage channel, so that the heat pump circulation circuit in the heat pump heating means and the refrigerant-water heat exchanger Hot water remaining in the water passage can be drained, and a hot water storage is provided by a check valve that is provided on the valve of the outflow prevention means and on the return pipe of the heat pump and prevents reverse flow of hot water from the hot water storage tank to the refrigerant-water heat exchanger side. Prevents outflow of hot water in the tank, and remains in the heat pump circulation circuit in the heat pump heating means and in the water passage of the refrigerant-water heat exchanger even if the power supply is stopped due to a power failure or the like when the outside air temperature is below freezing. Hot water It is possible to prevent freezing perform water, but never wastefully discharging the hot water in the hot water storage tank.

次にこの発明の一実施形態のヒートポンプ式給湯機を図１に基づき説明する。
１は湯水を貯湯する貯湯タンク、２は貯湯タンク１内の温水を加熱するヒートポンプ式加熱手段、３は前記ヒートポンプ式加熱手段２の凝縮器としての冷媒−水熱交換器、４はヒーポン循環回路で、前記貯湯タンク１の底部と冷媒−水熱交換器３とを結び貯湯タンク１内の湯水を冷媒−水熱交換器３に供給するヒーポン往き管５と、冷媒−水熱交換器３と貯湯タンク１上部とを結び冷媒−水熱交換器３で熱交換された温水を貯湯タンク１上部に戻すヒーポン戻り管６とから構成され、７は前記ヒーポン循環回路４に設けられて貯湯タンク１の湯水を循環させるヒーポン循環ポンプである。 Next, a heat pump type water heater according to an embodiment of the present invention will be described with reference to FIG.
1 is a hot water storage tank for storing hot water, 2 is a heat pump heating means for heating the hot water in the hot water storage tank 1, 3 is a refrigerant-water heat exchanger as a condenser of the heat pump heating means 2, and 4 is a heat pump circulation circuit. The heat pump forward pipe 5 that connects the bottom of the hot water storage tank 1 and the refrigerant-water heat exchanger 3 to supply hot water in the hot water tank 1 to the refrigerant-water heat exchanger 3, the refrigerant-water heat exchanger 3, A hot water return pipe 6 is connected to the upper part of the hot water storage tank 1 and returns the hot water heat-exchanged by the refrigerant-water heat exchanger 3 to the upper part of the hot water storage tank 1, and 7 is provided in the heat pump circulation circuit 4 and is provided in the hot water storage tank 1. This is a heat pump circulation pump that circulates hot and cold water.

８は貯湯タンク１の下端に接続され前記貯湯タンク１に水を給水する入水管、９は前記貯湯タンク１の上端に接続され貯湯されている高温水を出湯する出湯管、１０は前記入水管８から分岐された給水管、１１は前記出湯管９からの出湯と給水管１０からの給水を混合して設定温度の湯を供給する給湯混合弁である。   8 is a water inlet pipe connected to the lower end of the hot water storage tank 1 for supplying water to the hot water storage tank 1, 9 is a hot water outlet pipe connected to the upper end of the hot water storage tank 1 for discharging hot water, and 10 is the water inlet pipe. A water supply pipe 11 branched from the hot water supply pipe 11 is a hot water mixing valve for mixing hot water from the hot water discharge pipe 9 and water supplied from the water supply pipe 10 to supply hot water at a set temperature.

ここで前記ヒートポンプ式加熱手段２は、凝縮器としての前記冷媒−水熱交換器３と圧縮機１２と電子膨張弁１３と強制空冷式の蒸発器１４とで構成され、このヒートポンプ式加熱手段２の冷媒には二酸化炭素が用いられ超臨界ヒートポンプサイクルを構成しているものである。   Here, the heat pump heating means 2 includes the refrigerant-water heat exchanger 3 as a condenser, a compressor 12, an electronic expansion valve 13, and a forced air-cooled evaporator 14, and the heat pump heating means 2 Carbon dioxide is used as the refrigerant of this to constitute a supercritical heat pump cycle.

１５は冷媒−水熱交換器３を構成する湯水が通る水通路、１６は給電時に閉弁し停電等の給電停止時には排水路１７を開弁する開閉手段としての電磁弁、１８は給電時は開弁し停電等の給電停止時には閉弁することで貯湯タンク１から湯水の流出を防ぐ流出防止手段としての電磁弁、１９は前記貯湯タンク１から前記冷媒−水熱交換器３側への湯水の逆流を阻止する逆流防止手段としての逆止弁、２０は前記冷媒−水熱交換器３の水通路１５内や前記ヒーポン循環回路４内に溜まる空気を排出する空気排出手段としての空気抜き弁である。   15 is a water passage through which hot and cold water constituting the refrigerant-water heat exchanger 3 passes, 16 is a solenoid valve serving as an opening / closing means for closing the valve when power is supplied and opening the drainage channel 17 when power supply is stopped due to a power failure or the like. An electromagnetic valve as an outflow prevention means for preventing the outflow of hot water from the hot water storage tank 1 by closing the valve when the power supply is stopped due to a power failure such as a power failure, and 19 is hot water from the hot water storage tank 1 to the refrigerant-water heat exchanger 3 side. A check valve 20 as a backflow prevention means for preventing the backflow of the air, and an air vent valve 20 as an air discharge means for discharging the air accumulated in the water passage 15 of the refrigerant-water heat exchanger 3 and the heat pump circulation circuit 4. is there.

２１は、前記給湯混合弁１１の駆動を制御し、さらに前記ヒートポンプ式加熱手段２の構成要素と前記ヒーポン循環ポンプ７の駆動を制御することで冷媒−水熱交換器３に流入してきた湯水を所望の沸き上げ温度まで沸き上げるようにしている制御手段で、予めプログラミングされたマイクロコンピュータを主体として構成されている。   21 controls the drive of the hot water supply mixing valve 11 and further controls the components of the heat pump type heating means 2 and the drive of the heat pump circulation pump 7 to supply hot water flowing into the refrigerant-water heat exchanger 3. The control means is configured to boil up to a desired boiling temperature, and is mainly composed of a pre-programmed microcomputer.

なお、図２（ａ）、（ｂ）は前記電磁弁１６の給電時の作動、停電等の給電停止時の作動を示したものである。前記電磁弁１６は給電時にはコイル２２に電流が流れ、先端に弁体２３が直結した可動鉄片であるプランジャ２４に電磁力がここでは下方向に加わり弁は閉弁する。その際、バネ２５はプランジャ２４によって縮められた状態となる。ここで停電等で給電が停止されるとコイル２２に電流は流れないので電磁力は発生せず、縮められたバネ２５が元の状態に戻ろうとする力がプランジャ２４に上方向に働くことで弁は開弁する。   2A and 2B show the operation of the solenoid valve 16 during power feeding and the operation when power feeding is stopped such as a power failure. In the electromagnetic valve 16, a current flows through the coil 22 during power feeding, and an electromagnetic force is applied downward to the plunger 24, which is a movable iron piece directly connected to the tip of the valve body 23, thereby closing the valve. At that time, the spring 25 is contracted by the plunger 24. Here, when the power supply is stopped due to a power failure or the like, no current flows through the coil 22, so no electromagnetic force is generated, and the force to return the contracted spring 25 to the original state acts on the plunger 24 upward. The valve opens.

即ち、給電時は電磁力により閉弁し停電等の給電停止時にはバネ２５の力によって開弁する構成となっている。本実施形態では電磁弁１６には弁体２３とプランジャ２４が一体となった直動式の電磁弁を用いたが、給電時は閉弁し停電等の給電停止時には開弁する電磁弁であれば直動式でなくとも採用することができる。   In other words, the valve is closed by electromagnetic force during power supply, and is opened by the force of the spring 25 when power supply is stopped due to a power failure or the like. In this embodiment, a direct acting solenoid valve in which the valve body 23 and the plunger 24 are integrated is used as the solenoid valve 16. However, the solenoid valve 16 may be closed when power is supplied and opened when power supply is stopped due to a power failure or the like. If it is not a direct acting type, it can be adopted.

また、図３（ａ）、（ｂ）は前記電磁弁１８の給電時の作動、停電等の給電停止時の作動を示したもので図２と同一部分には同一符号を付すものとする。前記電磁弁１８は給電時にはコイル２２に電流が流れ、先端に弁体２３が直結した可動鉄片であるプランジャ２４に電磁力がここでは上方向に加わり弁は開弁する。その際、バネ２５はプランジャ２４によって縮められた状態となる。ここで停電等で給電が停止されるとコイル２２に電流は流れないので電磁力は発生せず、縮められたバネ２５が元の状態に戻ろうとする力がプランジャ２４に下方向に働くことで弁を閉弁する。   3 (a) and 3 (b) show the operation of the electromagnetic valve 18 during power supply and the operation when power supply is stopped such as a power failure, and the same parts as those in FIG. In the electromagnetic valve 18, a current flows through the coil 22 during power feeding, and an electromagnetic force is applied upward to the plunger 24, which is a movable iron piece directly connected to the valve body 23 at the tip, and the valve is opened. At that time, the spring 25 is contracted by the plunger 24. Here, when the power supply is stopped due to a power failure or the like, no current flows through the coil 22, so no electromagnetic force is generated, and the force that the contracted spring 25 attempts to return to the original state acts on the plunger 24 downward. Close the valve.

即ち、給電時は電磁力により開弁し停電等の給電停止時にはバネ２５の力によって閉弁する構成となっている。本実施形態では電磁弁１８には弁体２３とプランジャ２４が一体となった直動式の電磁弁を用いたが、給電時は開弁し停電等の給電停止時は閉弁する電磁弁であれば直動式でなくとも採用することができる。   In other words, the valve is opened by electromagnetic force during power supply, and is closed by the force of the spring 25 when power supply is stopped due to a power failure or the like. In this embodiment, a direct acting solenoid valve in which the valve body 23 and the plunger 24 are integrated is used as the solenoid valve 18. However, the solenoid valve 18 is opened when power is supplied and is closed when power supply is stopped due to a power failure or the like. If it is, it can be adopted even if it is not a direct acting type.

次に、図１に示す一実施形態の作動において、貯湯タンク１内にヒートポンプ式加熱手段２で加熱された高温水を貯湯する貯湯運転について説明する。
制御手段２１は深夜時刻になると時間帯別契約電力の電力単価が安価な深夜時間帯で朝の所定時刻までに沸き上がるように貯湯運転を開始すると共に、ヒートポンプ式加熱手段２およびヒーポン循環ポンプ７の駆動して、貯湯タンク１の底部から取り出した湯水をヒートポンプ式加熱手段２により沸き上げ温度まで沸き上げて貯湯タンク１の上部に積層させるように貯湯する。そして所望の熱量を貯湯するとヒーポン循環ポンプ７およびヒートポンプ式加熱手段２を停止して貯湯運転を終了する。 Next, a hot water storage operation in which hot water stored in the hot water storage tank 1 by the heat pump heating means 2 is stored in the operation of the embodiment shown in FIG. 1 will be described.
The control means 21 starts the hot water storage operation so that the unit price of the contracted power for each time zone will be boiled by a predetermined time in the morning in the late night time when the midnight time comes, and the heat pump type heating means 2 and the heat pump circulation pump 7 The hot water is driven and heated from the bottom of the hot water storage tank 1 to the boiling temperature by the heat pump heating means 2 so as to be stacked on top of the hot water storage tank 1. When the desired amount of heat is stored, the heat pump circulation pump 7 and the heat pump heating means 2 are stopped and the hot water storage operation is terminated.

次に、ユーザーが給湯栓を開いて給湯する時の給湯運転について説明する。
給湯栓が開かれると入水管８から貯湯タンク１内に給水されると同時に出湯管９から高温水が出湯される。このとき、貯湯タンク１の底部には低温の給水が高温水と入れ替わりで貯められる。そして、この出湯管９からの高温水は給湯混合弁１１に流入し、前記制御手段２０により制御される給湯混合弁１１によって給水管１０からの給水と混合されて所望の給湯設定温度で給湯栓から給湯される。 Next, a hot water supply operation when the user opens the hot water tap to supply hot water will be described.
When the hot-water tap is opened, hot water is discharged from the hot water discharge pipe 9 at the same time that the hot water storage tank 1 is supplied with water. At this time, the low temperature water supply is stored in the bottom of the hot water storage tank 1 by replacing the high temperature water. The hot water from the hot water supply pipe 9 flows into the hot water supply mixing valve 11 and is mixed with the water supply from the water supply pipe 10 by the hot water supply mixing valve 11 controlled by the control means 20, and the hot water tap at a desired hot water supply set temperature. Hot water is supplied from.

次に、停電等で給電停止した場合の作動について説明する。
電力供給側の事情や落雷、事故等で電力を供給できない場合、ヒーポン循環回路４を構成するヒーポン往き管５に備えられた電磁弁１６が図２（ａ）、（ｂ）に示した作動により停電等の給電停止時には弁を開弁し排水路１７から排水でき、もし外気温度が氷点下である時に停電等で給電が停止した場合でも、前記ヒーポン循環回路４内と冷媒−水熱交換器３の水通路１５内と貯湯タンク１内に残留する湯水の排水を行い凍結を防止することができるものである。 Next, the operation when power supply is stopped due to a power failure or the like will be described.
When power cannot be supplied due to circumstances on the power supply side, lightning strikes, accidents, etc., the electromagnetic valve 16 provided in the heat pump forward pipe 5 constituting the heat pump circulation circuit 4 is operated by the operation shown in FIGS. 2 (a) and 2 (b). When the power supply is stopped due to a power failure or the like, the valve can be opened and drained from the drainage channel 17. Even if the power supply is stopped due to a power failure or the like when the outside air temperature is below freezing point, the heat pump circulation circuit 4 and the refrigerant-water heat exchanger 3 The hot water remaining in the water passage 15 and the hot water storage tank 1 can be drained to prevent freezing.

この時、電磁弁１６はヒーポン循環回路４および冷媒−水熱交換器３の水通路１５の中で高さ位置が最下部であるところに備えることで、前記ヒーポン循環回路４内と冷媒−水熱交換器３の水通路１５内と貯湯タンク１内に残留する湯水を残さず排水できる。   At this time, the solenoid valve 16 is provided in the heat pump circulation circuit 4 and the water passage 15 of the refrigerant-water heat exchanger 3 where the height position is at the lowest position, so that the heat pump circulation circuit 4 and the refrigerant-water are connected. The hot water remaining in the water passage 15 of the heat exchanger 3 and the hot water storage tank 1 can be drained without being left behind.

しかし、電磁弁１６を備えただけではヒーポン循環回路４内および冷媒−水熱交換器３の水通路１５内の湯水のみならず、貯湯タンク１内の湯水まで排水してしまう。そこでヒーポン往き管５と貯湯タンク１との接続部近傍に電磁弁１８、ヒーポン戻り管６と貯湯タンク１との接続部近傍に逆止弁１９をそれぞれ設け、前記電磁弁１８は図３（ａ）、（ｂ）に示した作動により停電等の給電停止時には弁を閉弁することで貯湯タンク１内の湯水の流出を防ぎ、前記逆止弁１９は前記貯湯タンク１から前記冷媒−水熱交換器３側へ湯水が逆流するのを防ぐことで、停電等の給電停止時には前記貯湯タンク１内の湯水を無駄に流出することなく、前記ヒーポン循環回路４内および前記冷媒−水熱交換器３の水通路１５内に残留する湯水の排水を行い凍結を防止することができるものである。   However, if only the electromagnetic valve 16 is provided, not only hot water in the heat pump circulation circuit 4 and the water passage 15 of the refrigerant-water heat exchanger 3 but also hot water in the hot water storage tank 1 is drained. Therefore, an electromagnetic valve 18 is provided in the vicinity of the connection portion between the heat-pump forward pipe 5 and the hot water storage tank 1, and a check valve 19 is provided in the vicinity of the connection portion between the heat-pump return pipe 6 and the hot water storage tank 1, respectively. ), The operation shown in (b) prevents the outflow of hot water in the hot water storage tank 1 by closing the valve when the power supply is stopped due to a power failure or the like, and the check valve 19 prevents the refrigerant-water heat from the hot water storage tank 1. By preventing the hot water from flowing back to the exchanger 3 side, the hot water in the hot water storage tank 1 is not unnecessarily discharged when the power supply is stopped due to a power failure or the like, and in the heat pump circulation circuit 4 and the refrigerant-water heat exchanger. The hot water remaining in the three water passages 15 can be drained to prevent freezing.

ここで、電磁弁１６はヒーポン循環回路４内および冷媒−水熱交換器３の水通路１５内に残留する湯水を残さず排水するために、ヒーポン循環回路４中で高さ位置が最下部で、且つ前記冷媒−水熱交換器３と電磁弁１８との間に備えられるのが良く、さらにヒートポンプ式加熱手段２内に収納されているヒーポン循環回路４中に備えると、組み立て時にヒートポンプ式加熱手段２として組み付けられ、配管作業時に取り付けるような手間がいらず便利である。   Here, the electromagnetic valve 16 drains all hot water remaining in the heat pump circulation circuit 4 and in the water passage 15 of the refrigerant-water heat exchanger 3, so that the height position is the lowest in the heat pump circulation circuit 4. In addition, it is preferable to be provided between the refrigerant-water heat exchanger 3 and the electromagnetic valve 18, and when it is provided in the heat pump circulation circuit 4 housed in the heat pump heating means 2, the heat pump heating is performed at the time of assembly. It is assembled as means 2 and is convenient because it does not require the trouble of attaching it during piping work.

また、冷媒−水熱交換器３の水通路１５が高さ位置で最下部である場合には該冷媒−水熱交換器３の水通路１５の最下部に電磁弁１６を備えても良い。   Further, when the water passage 15 of the refrigerant-water heat exchanger 3 is at the lowest position in the height position, an electromagnetic valve 16 may be provided at the lowermost portion of the water passage 15 of the refrigerant-water heat exchanger 3.

また、冷媒−水熱交換器３の水通路１５が高さ位置で最下部でない場合でも、電磁弁１６を該冷媒−水熱交換器３の水通路１５に備えても良く、この場合は前記冷媒−水熱交換器３の水通路１５の最下部に電磁弁１６を備え、最悪でも前記冷媒−水熱交換器３の水通路１５内の水が抜け、前記冷媒−水熱交換器３の水通路１５の凍結を防止できれば良いものである。   Further, even when the water passage 15 of the refrigerant-water heat exchanger 3 is not at the lowest position in the height position, the electromagnetic valve 16 may be provided in the water passage 15 of the refrigerant-water heat exchanger 3, and in this case, A solenoid valve 16 is provided at the lowermost part of the water passage 15 of the refrigerant-water heat exchanger 3, and at the worst, water in the water passage 15 of the refrigerant-water heat exchanger 3 escapes, so that the refrigerant-water heat exchanger 3 It is only necessary to prevent the water passage 15 from freezing.

さらに、ヒーポン循環回路４内に空気抜き弁２０が備えてあることによって、排水時には空気抜き弁２０内部の水位が下がり弁が開弁され空気を取り込み、取り込まれた空気と残留する湯水が入れ替わることでヒーポン循環回路４内および冷媒−水熱交換器３の水通路１５内に残留する湯水を速やかに排水することができるものである。   Further, since the air vent valve 20 is provided in the heat pump circulation circuit 4, the water level in the air vent valve 20 is lowered and the valve is opened when the water is drained, the air is taken in, and the taken-in air and the remaining hot water are exchanged. Hot water remaining in the circulation circuit 4 and the water passage 15 of the refrigerant-water heat exchanger 3 can be quickly drained.

また、空気抜き弁２０は冷媒−水熱交換器３の水通路１５内や前記ヒーポン循環回路４内に溜まる空気を排出するためヒーポン循環回路４の中で高さ位置が最上部で、且つ前記冷媒−水熱交換器３と逆止弁１９との間に備えられるのが良く、さらにヒートポンプ式加熱手段２内に収納されているヒーポン循環回路４中に備えると、組み立て時にヒートポンプ式加熱手段２として組み付けられ、配管作業時に取り付けるような手間がいらず便利である。   The air vent valve 20 is located at the top in the heat pump circulation circuit 4 for discharging the air accumulated in the water passage 15 of the refrigerant-water heat exchanger 3 and the heat pump circulation circuit 4, and the refrigerant. -It is good to be provided between the water heat exchanger 3 and the check valve 19, and when it is provided in the heat pump circulation circuit 4 housed in the heat pump heating means 2, the heat pump heating means 2 is assembled at the time of assembly. It is assembled and convenient without the hassle of mounting during piping work.

また、冷媒−水熱交換器３の水通路１５が高さ位置で最上部である場合には該冷媒−水熱交換器３の水通路１５の最上部に空気抜き弁２０を備えても良い。   Further, when the water passage 15 of the refrigerant-water heat exchanger 3 is at the uppermost position in the height position, an air vent valve 20 may be provided at the uppermost portion of the water passage 15 of the refrigerant-water heat exchanger 3.

この発明の一実施形態のヒートポンプ式給湯機を示す概略構成図。BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows the heat pump type water heater of one Embodiment of this invention. 同開閉手段を構成する電磁弁の一例を示す断面図。Sectional drawing which shows an example of the solenoid valve which comprises the opening / closing means. 同開閉手段と逆動作する電磁弁の一例を示す断面図。Sectional drawing which shows an example of the solenoid valve which reversely operates with the opening / closing means.

符号の説明Explanation of symbols

１ 貯湯タンク
２ ヒートポンプ式加熱手段
３ 冷媒−水熱交換器
４ ヒーポン循環回路
７ ヒーポン循環ポンプ
８ 入水管
９ 出湯管
１５ 冷媒−水熱交換器を構成する水通路
１６ 開閉手段（電磁弁）
１７ 排水路 DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Heat pump type heating means 3 Refrigerant-water heat exchanger 4 Heaton circulation circuit 7 Heaton circulation pump 8 Water inlet pipe 9 Hot water outlet pipe 15 Water passage 16 constituting refrigerant-water heat exchanger 16 Opening / closing means (solenoid valve)
17 Drainage channel

Claims (1)

入水管と出湯管が接続され湯水を貯湯する貯湯タンクと、該貯湯タンク内の湯水を加熱するヒートポンプ式加熱手段と、前記貯湯タンクと前記ヒートポンプ式加熱手段内に収納される冷媒−水熱交換器とを湯水が循環可能に接続し、前記貯湯タンク内の湯水を前記冷媒−水熱交換器に供給するヒーポン往き管と前記冷媒−水熱交換器で熱交換された湯水を前記貯湯タンクに戻すヒーポン戻り管とから構成されるヒーポン循環回路と、該ヒーポン循環回路に設けられ湯水を循環させるヒーポン循環ポンプとを備えたヒートポンプ式給湯機に於いて、前記ヒーポン往き管に設けられ給電時は開弁し給電停止時には閉弁する流出防止手段と、前記ヒーポン戻り管に設けられ前記貯湯タンクから前記冷媒−水熱交換器側への湯水の逆流を阻止する逆止弁と、前記流出防止手段よりも下流側且つ前記逆止弁よりも上流側にある前記ヒートポンプ式加熱手段内の前記ヒーポン循環回路または前記冷媒−水熱交換器を構成する水通路の中で、高さ位置が最下部となる位置に、給電時は排水路を閉弁し給電停止時には排水路を開弁する開閉手段とを備え、給電停止時には、前記開閉手段が排水路を開弁すると共に、前記流出防止手段が閉弁し、前記ヒートポンプ式加熱手段内の前記ヒーポン循環回路内および前記冷媒−水熱交換器を構成する水通路内の湯水を排水すると共に、前記貯湯タンクからの湯水の流出を防ぐようにしたことを特徴とするヒートポンプ式給湯機。 A hot water storage tank in which hot water is stored by connecting a water intake pipe and a hot water discharge pipe, heat pump heating means for heating the hot water in the hot water storage tank, and refrigerant-water heat exchange stored in the hot water storage tank and the heat pump heating means A hot water supply is connected to the water heater so that the hot water can circulate, and a hot water outlet pipe for supplying hot water in the hot water storage tank to the refrigerant-water heat exchanger and hot water subjected to heat exchange by the refrigerant-water heat exchanger are supplied to the hot water storage tank. In a heat pump type hot water heater provided with a heat pump circulation circuit composed of a return heat pipe return pipe and a heat pump circulation pump provided in the heat pump circulation circuit for circulating hot water and water. An outflow prevention means that opens and closes when power is stopped, and a check that prevents reverse flow of hot water from the hot water storage tank to the refrigerant-water heat exchanger provided in the heat pump return pipe. And in the water passage constituting the heat pump circulation circuit or the refrigerant-water heat exchanger in the heat pump type heating means located downstream from the outflow prevention means and upstream from the check valve, at the position is the lowest position, the power feeding is provided with a closing means at the time closes the drainage feed stop opening the drainage, at the time of power supply stop, the switching means is opened the drainage, The outflow prevention means closes, drains hot water in the heat pump circulation circuit in the heat pump heating means and the water passage constituting the refrigerant-water heat exchanger, and flows out of hot water from the hot water storage tank. A heat pump type water heater characterized by preventing the above .
JP2006255501A 2006-09-21 2006-09-21 Heat pump water heater Expired - Fee Related JP4898368B2 (en)

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JP4568900B1 (en) * 2009-06-08 2010-10-27 株式会社光合金製作所 Freezing prevention system for heat pump water heater and its anti-freezing valve device
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JP2012002400A (en) * 2010-06-15 2012-01-05 Rinnai Corp Hot water supply apparatus
JP5370893B2 (en) * 2010-08-11 2013-12-18 オリオン機械株式会社 Hot water storage water heater and control method of hot water storage water heater
JP2012107846A (en) * 2010-11-19 2012-06-07 Hitachi Appliances Inc Exhaust heat utilization system of refrigerating device
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