JP5421181B2 - Heat pump water heater - Google Patents

Heat pump water heater Download PDF

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JP5421181B2
JP5421181B2 JP2010092703A JP2010092703A JP5421181B2 JP 5421181 B2 JP5421181 B2 JP 5421181B2 JP 2010092703 A JP2010092703 A JP 2010092703A JP 2010092703 A JP2010092703 A JP 2010092703A JP 5421181 B2 JP5421181 B2 JP 5421181B2
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hot water
water supply
pipe
storage tank
water
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JP2011220645A (en
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正喜 高地
純平 林
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Corona Corp
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Description

この発明は、ヒートポンプユニットで湯水を加熱し貯湯タンク内に貯湯するヒートポンプ式給湯機に関するものである。   The present invention relates to a heat pump water heater that heats hot water with a heat pump unit and stores the hot water in a hot water storage tank.

従来のヒートポンプ式給湯機について図８に基づいて説明する。
１０１は湯水を貯湯する貯湯タンク、１０２は該貯湯タンク１０１に接続される配管や制御部等を含めて筐体内部に収める貯湯タンクユニット、１０３は貯湯タンク１０１下部と接続され市水を給水する給水管、１０４は貯湯タンク１０１内の湯水を加熱する加熱手段としてのヒートポンプユニット、１０５は給水管１０３から分岐した給水バイパス管、１０６は貯湯タンク上部から高温水を出湯する出湯管、１０７は給水バイパス管１０５内の低温水と出湯管１０６内の高温水を適当な温度に調節して給湯管１０８に流入させる給湯混合弁、１０９は給水バイパス管１０５内の低温水と出湯管１０６内の高温水を適当な温度に調節して湯張り管１１０に流入させる風呂混合弁、１１１は貯湯タンク１０１上部に連通した逃し弁、１１２は給水管１０３内に設置され栓の開閉で給水の流入を調節可能な給水栓、１１３は貯湯タンク１０１内の湯水を排水する排水管内に設置された排水弁を備えている。 A conventional heat pump type water heater will be described with reference to FIG.
Reference numeral 101 denotes a hot water storage tank for storing hot water, reference numeral 102 denotes a hot water storage tank unit that is housed in the housing including piping and a control unit connected to the hot water storage tank 101, and reference numeral 103 is connected to the lower part of the hot water storage tank 101 to supply city water. A water supply pipe, 104 is a heat pump unit as a heating means for heating hot water in the hot water storage tank 101, 105 is a water supply bypass pipe branched from the water supply pipe 103, 106 is a hot water discharge pipe for discharging hot water from the upper part of the hot water storage tank, and 107 is water supply A hot water supply mixing valve 109 adjusts the low temperature water in the bypass pipe 105 and the high temperature water in the hot water discharge pipe 106 to an appropriate temperature and flows into the hot water supply pipe 108, and 109 indicates the high temperature in the low temperature water in the hot water supply bypass pipe 105 and the high temperature in the hot water discharge pipe 106. A bath mixing valve that adjusts the water to an appropriate temperature and flows into the hot water pipe 110, 111 is a relief valve that communicates with the upper part of the hot water storage tank 101, and 112 is a water supply valve Adjustable hydrant the inflow of water in closing plug installed within the tube 103, 113 is provided with a drain valve installed in the drainage pipe for draining hot water in the hot water storage tank 101.

このようなヒートポンプ式給湯機において、給湯混合弁１０７及び風呂混合弁１０９の交換作業時、作業者が給水栓１１２を閉栓して逃し弁１１１を開放したら排水弁１１３を開放し、図９で示されるように貯湯タンク１０１内にある湯水を給湯混合弁１０７及び風呂混合弁１０９が設置されている位置より低い水位になるまで排水してから排水弁１１３を閉止して、その後、作業者が給湯混合弁１０７と風呂混合弁１０９のどちらか一方、あるいは両方を取り外して交換作業を実施し、交換作業終了後に給水栓１１２を開栓して貯湯タンク１０１内に排水した湯水の量を満たすように給水する必要があった。   In such a heat pump type water heater, when the hot water mixing valve 107 and the bath mixing valve 109 are replaced, when the operator closes the water tap 112 and opens the relief valve 111, the drain valve 113 is opened, as shown in FIG. The hot water in the hot water storage tank 101 is drained until the water level becomes lower than the position where the hot water mixing valve 107 and the bath mixing valve 109 are installed, the drain valve 113 is closed, and then the operator Either or both of the mixing valve 107 and the bath mixing valve 109 are removed and replaced, and after the replacement is completed, the water tap 112 is opened so that the amount of hot water drained into the hot water storage tank 101 is satisfied. It was necessary to supply water.

特許４２９４６２４号公報Japanese Patent No. 4294624

しかし、この従来のものでは、貯湯タンク１０１内の湯水を所定量排水しても出湯管１０６内を満たしていた高温水の熱が残存しており、給湯混合弁１０７及び風呂混合弁１０９の温度が十分に低下せず、作業者が取り外して交換作業を実施する際に火傷を負う危険があった。   However, in this conventional apparatus, even when a predetermined amount of hot water in the hot water storage tank 101 is drained, the heat of the high-temperature water that has filled the hot water discharge pipe 106 remains, and the temperatures of the hot water mixing valve 107 and the bath mixing valve 109 remain. Was not sufficiently reduced, and there was a risk of burns when the operator removed and replaced.

また、給湯混合弁１０７及び風呂混合弁１０９が設置されている位置よりも低い水位になるまで貯湯タンク１０１内の湯水を排水する必要があったため、排水作業に数分かかる上に給湯使用可能な湯水を大量に排水していた。   Further, since it is necessary to drain the hot water in the hot water storage tank 101 until the water level becomes lower than the position where the hot water mixing valve 107 and the bath mixing valve 109 are installed, it takes several minutes for the drainage work and the hot water can be used. A large amount of hot water was drained.

上記課題を解決するために、本発明の請求項１では湯水を貯湯する貯湯タンクと、前記貯湯タンク内の湯水を加熱するヒートポンプユニットと、前記貯湯タンクに給水する給水管と、前記給水管から分岐した給水バイパス管と、前記給水管に給水を流入する給水栓と、前記貯湯タンク内の湯水を出湯する出湯管と、前記出湯管内の湯水と前記給水バイパス管内の給水とを混合して給湯管に供給する給湯混合弁と、前記出湯管内の湯水と前記給水バイパス管内の給水とを混合して湯張り管に供給する風呂混合弁と、前記給湯管内の湯水を出湯する給湯栓と、前記貯湯タンク内の湯水を排水する排水弁と、前記貯湯タンク内の圧力上昇を逃がす逃し弁と、前記給水管と前記給水バイパス管との分岐点の下流側途中に設置され前記貯湯タンクへの給水を遮断する給水遮断手段と、前記給湯混合弁及び前記風呂混合弁の交換モードを開始する交換モード開始手段とを備えたヒートポンプ式給湯機において、前記交換モード開始手段による交換モードの開始を検知したら、前記給水遮断手段によって前記貯湯タンクへの給水を遮断し、前記給湯混合弁の前記給水バイパス管側を閉塞させ、前記風呂混合弁の前記出湯管側と前記給水バイパス管側とを連通させる弁開度に調節するものである。 In order to solve the above problems, in claim 1 of the present invention, a hot water storage tank for storing hot water, a heat pump unit for heating hot water in the hot water storage tank, a water supply pipe for supplying water to the hot water storage tank, and the water supply pipe A hot water supply by mixing a branched water supply bypass pipe, a water faucet for flowing water into the water supply pipe, a hot water outlet pipe for discharging hot water in the hot water storage tank, hot water in the hot water discharge pipe and water supply in the water supply bypass pipe A hot water mixing valve for supplying to the pipe, a bath mixing valve for mixing the hot water in the hot water pipe and the water in the water supply bypass pipe to supply the hot water pipe, a hot water tap for discharging hot water in the hot water pipe, a drain valve for draining hot water in the hot water tank, feeding into the hot water storage and relief valve releasing the pressure rise in the tank, the disposed downstream side course of the branch point of the water supply pipe and the water supply bypass pipe the hot water storage tank In a heat pump type hot water heater provided with a water supply shut-off means for shutting off and a replacement mode start means for starting a replacement mode for the hot water mixing valve and the bath mixing valve, when the start of the replacement mode by the replacement mode start means is detected. A valve that shuts off water supply to the hot water storage tank by the water supply shut-off means, closes the water supply bypass pipe side of the hot water mixing valve, and connects the hot water pipe side of the bath mixing valve and the water supply bypass pipe side It adjusts to the opening.

また、請求項２では、湯水を貯湯する貯湯タンクと、前記貯湯タンク内の湯水を加熱するヒートポンプユニットと、前記貯湯タンクに給水する給水管と、前記給水管から分岐した給水バイパス管と、前記給水管に給水を流入する給水栓と、前記貯湯タンク内の湯水を出湯する出湯管と、前記出湯管内の湯水と前記給水バイパス管内の給水とを混合して給湯管に供給する給湯混合弁と、前記出湯管内の湯水と前記給水バイパス管内の給水とを混合して湯張り管に供給する風呂混合弁と、前記給湯管内の湯水を出湯する給湯栓と、前記貯湯タンク内の湯水を排水する排水弁と、前記貯湯タンク内の圧力上昇を逃がす逃し弁と、前記給水管と前記給水バイパス管との分岐点の下流側途中に設置され前記貯湯タンクへの給水を遮断する給水遮断手段と、前記給湯混合弁及び前記風呂混合弁の交換モードを開始する交換モード開始手段とを備えたヒートポンプ式給湯機において、前記交換モード開始手段による交換モードの開始を検知したら、前記給水遮断手段によって前記貯湯タンクへの給水を遮断し、前記給湯混合弁の前記出湯管側と前記給水バイパス管側とを連通させ、前記風呂混合弁の前記給水バイパス管側を閉塞させる弁開度に調節するものである。 Further, in claim 2, a hot water storage tank for storing hot water, a heat pump unit for heating the hot water in the hot water storage tank, a water supply pipe for supplying water to the hot water storage tank, a water supply bypass pipe branched from the water supply pipe, A water faucet that flows water into the water supply pipe, a hot water pipe that discharges hot water in the hot water storage tank, a hot water mixing valve that mixes hot water in the hot water pipe and water supply in the water supply bypass pipe and supplies the mixed water to the hot water pipe The hot water in the hot water pipe and the hot water in the water supply bypass pipe are mixed and supplied to the hot water pipe, a hot water tap for discharging hot water in the hot water pipe, and the hot water in the hot water storage tank are drained. a drain valve, and the hot water storage relief valve releasing the pressure rise in the tank, a water supply shut-off means the installed downstream the middle of the branch point of the water supply pipe and the water supply bypass pipe to block the water supply to the hot water storage tank In a heat pump type hot water heater comprising an exchange mode start means for starting an exchange mode of the hot water mixing valve and the bath mixing valve, when the start of the exchange mode by the exchange mode start means is detected, the hot water storage means is used to blocking the water supply to the tank, the said pouring tube side of the hot water supply mixing valve communicates with said water supply bypass pipe side, is to adjust the valve opening to close the water supply bypass pipe side of the bath mixing valve .

また、請求項３では、前記給水遮断手段を手動の閉止弁で構成するものである。   Moreover, in Claim 3, the said water supply interruption | blocking means is comprised with a manual closing valve.

この発明によれば、給水遮断手段で給水管から貯湯タンクへの給水流路を遮断し、給湯混合弁及び風呂混合弁を所定の弁開度に調節してから給湯栓を開栓することで、高温の出湯管内に低温の給水を流入させることができるため、作業者が各混合弁を交換する作業の際に火傷を負う危険が防止される。   According to this invention, the water supply passage from the water supply pipe to the hot water storage tank is shut off by the water supply cutoff means, and the hot water supply valve is opened after adjusting the hot water supply mixing valve and the bath mixing valve to the predetermined valve opening degree. Since the low-temperature water supply can be allowed to flow into the high-temperature tap pipe, there is no risk of burns when the operator replaces each mixing valve.

また、給湯栓を開栓して出湯した高温水の温度が低下したら閉栓し、さらに給水栓を閉栓して給水管への給水を閉止し、その後に、逃し弁を開放してから排水弁を開放して排水する際、給水遮断手段で給水管から貯湯タンクへの給水流路が遮断されていることで、出湯管内に存在する高温水のみを排水することができるので、排水量を最小限に抑えられる。   Also, when the temperature of the hot water discharged from the hot water tap has dropped, shut it off, and then close the water tap to close the water supply to the water supply pipe. When the water is opened and drained, the water supply passage from the water supply pipe to the hot water storage tank is blocked by the water supply cutoff means, so that only high-temperature water present in the hot water discharge pipe can be drained, minimizing the amount of drainage. It can be suppressed.

この発明の一実施形態を示すヒートポンプ式給湯機の概略構成図Schematic configuration diagram of a heat pump type water heater showing an embodiment of the present invention 同実施形態の交換モード時の給水流路を説明する図The figure explaining the water supply flow path at the time of the exchange mode of the embodiment 同実施形態の交換モード時の排水流路を説明する図The figure explaining the drainage channel at the time of exchange mode of the embodiment 同実施形態の交換モード時の給水流路を説明する図The figure explaining the water supply flow path at the time of the exchange mode of the embodiment 同実施形態の交換モード時の給水流路を説明する図The figure explaining the water supply flow path at the time of the exchange mode of the embodiment この発明の第２実施形態の交換モード時の給水流路を説明する図The figure explaining the water supply flow path at the time of the exchange mode of 2nd Embodiment of this invention この発明の第３実施形態を示すヒートポンプ式給湯機の概略構成図Schematic block diagram of a heat pump type water heater showing a third embodiment of the present invention 従来のヒートポンプ式給湯機の一実施形態を示す概略構成図The schematic block diagram which shows one Embodiment of the conventional heat pump type water heater 同実施形態の混合弁交換時の排水流路を説明する図The figure explaining the drainage channel at the time of mixing valve exchange of the embodiment

次に、この発明を適用した第１実施形態を図１に基づいて説明する。
１は内部に貯湯タンク２を収納した貯湯タンクユニット、３は貯湯タンク２上部の高温水を出湯する出湯管、４は貯湯タンク２に給水する給水管である。 Next, a first embodiment to which the present invention is applied will be described with reference to FIG.
Reference numeral 1 denotes a hot water storage tank unit in which a hot water storage tank 2 is housed, 3 is a hot water outlet pipe for discharging hot water in the upper part of the hot water storage tank 2, and 4 is a water supply pipe for supplying water to the hot water storage tank 2.

５は加熱手段としてのヒートポンプユニットであり、冷媒を高温高圧に圧縮する圧縮機６、凝縮器としての水冷媒熱交換器７、冷媒を減圧する膨張弁８、空気と熱交換することで冷媒を加熱する空気熱交換器９で構成されたヒートポンプ回路１０と、貯湯タンク２下部と水冷媒熱交換器７を配管で接続するヒーポン往き管１１、水冷媒熱交換器７と貯湯タンク２上部を配管で接続するヒーポン戻り管１２、ヒーポン往き管１１とヒーポン戻り管１２から成る加熱循環回路１３を介して湯水を搬送する循環ポンプ１４、それらの駆動を制御するヒーポン制御部１５とを備えている。   5 is a heat pump unit as a heating means, a compressor 6 that compresses the refrigerant to high temperature and high pressure, a water refrigerant heat exchanger 7 as a condenser, an expansion valve 8 that decompresses the refrigerant, and exchanges heat with air to exchange the refrigerant. A heat pump circuit 10 composed of a heated air heat exchanger 9, a heat pump forward pipe 11 connecting the lower part of the hot water storage tank 2 and the water refrigerant heat exchanger 7 by piping, and a pipe of the water refrigerant heat exchanger 7 and the upper part of the hot water storage tank 2 Are connected to the heat pump return pipe 12, the heat pump return pipe 11 and the heat pump return circuit 12 are connected to the circulation pump 14 for conveying hot water through the heating circulation circuit 13, and the heat pump control section 15 is configured to control the driving of these pumps.

１６は給水管４から分岐した給水バイパス管、１７は出湯管３と給水バイパス管１６内の湯水を所定の比率で混合して給湯設定温度に調節する給湯混合弁、１８は出湯管３と給水バイパス管１６内の湯水を所定の比率で混合して風呂設定温度に調節する風呂混合弁である。   16 is a water supply bypass pipe branched from the water supply pipe 4, 17 is a hot water supply mixing valve that mixes hot water in the hot water supply pipe 3 and the hot water supply bypass pipe 16 at a predetermined ratio to adjust to a hot water supply set temperature, and 18 is a hot water supply pipe 3 and water supply. This is a bath mixing valve that mixes hot water in the bypass pipe 16 at a predetermined ratio and adjusts the temperature to the bath set temperature.

１９は給湯管２０内を流動する湯水を洗面所等にある給湯口２１から栓を開栓することで出湯可能な給湯栓、２２は給湯管２０内を流動する湯水の温度を検知する給湯温度センサ、２３は給湯管２０内を流動する湯水の流量を検知する給湯流量カウンタである。   19 is a hot-water tap that allows hot water flowing in the hot-water supply pipe 20 to be discharged by opening the plug from a hot-water supply port 21 in a washroom or the like, and 22 is a hot-water supply temperature for detecting the temperature of the hot water flowing in the hot-water supply pipe 20. A sensor 23 is a hot water supply flow rate counter that detects the flow rate of hot water flowing in the hot water supply pipe 20.

２４は浴槽２５の湯水を加熱するステンレス製の蛇管よりなる風呂用熱交換器であり、貯湯タンク２内に備えられている。また、２６は浴槽２５内の湯水を風呂用熱交換器２４に搬送する風呂往き管、２７は風呂用熱交換器２４で加熱された湯水を浴槽２５内に搬送する風呂戻り管、２８は風呂戻り管２７内に設置され湯水を浴槽２５、風呂往き管２６、風呂用熱交換器２４、風呂戻り管２７内で順次循環させる風呂循環ポンプであり、浴槽２５内の湯水が貯湯タンク２内の高温水により加熱されて保温や追い焚きが行われるものである。
なお、２９は風呂戻り管２７内を流動する湯水の温度を検知する風呂温度センサである。 Reference numeral 24 denotes a heat exchanger for bath made of a stainless snake pipe for heating hot water in the bathtub 25, and is provided in the hot water storage tank 2. Reference numeral 26 denotes a bath outlet pipe for transporting hot water in the bathtub 25 to the bath heat exchanger 24, 27 denotes a bath return pipe for transporting hot water heated by the bath heat exchanger 24 into the bathtub 25, and 28 denotes a bath. A bath circulation pump that is installed in the return pipe 27 and sequentially circulates hot water in the bathtub 25, the bath outlet pipe 26, the bath heat exchanger 24, and the bath return pipe 27, and the hot water in the bathtub 25 is stored in the hot water storage tank 2. It is heated by high-temperature water and is kept warm and chased.
Reference numeral 29 denotes a bath temperature sensor that detects the temperature of hot water flowing in the bath return pipe 27.

３０は風呂混合弁１８で設定温度に調節された湯水を風呂戻り管２７に搬送する湯張り管であり、配管途中には、風呂混合弁１８で混合された湯水の温度を検知する湯張り温度センサ３１、浴槽２５への湯張り開始及び停止を行う湯張り弁３２、浴槽２５への湯張り量を検知する風呂流量カウンタ３３、浴槽２５の湯水が逆流するのを防止する逆止弁３４が設置されている。   Reference numeral 30 denotes a hot water pipe that conveys hot water adjusted to the set temperature by the bath mixing valve 18 to the bath return pipe 27. In the middle of the piping, the hot water temperature that detects the temperature of the hot water mixed by the bath mixing valve 18 is detected. A sensor 31, a hot water filling valve 32 for starting and stopping hot water filling to the bathtub 25, a bath flow rate counter 33 for detecting the amount of hot water filling to the bathtub 25, and a check valve 34 for preventing the hot water in the bathtub 25 from flowing backward. is set up.

３５はマイコン等からなる給湯制御部で、ヒーポン制御部１５を制御して貯湯タンク２の側面に複数設置された貯湯温度サーミスタ３６の情報から加熱循環回路１３による貯湯タンク２の沸き上げや沸き増し、給湯の温度、風呂の湯張りや追い焚き、保温等の制御を行う。   Reference numeral 35 denotes a hot water supply control unit composed of a microcomputer or the like, which controls the heat-pump control unit 15 to raise or increase the hot water storage tank 2 by the heating circulation circuit 13 based on information of the hot water storage temperature thermistors 36 installed on the side surface of the hot water storage tank 2. Controls such as hot water supply temperature, hot water bathing, chasing, and warming.

３７は給湯や風呂等の各種設定が可能なリモコンであり、貯湯タンク２内の湯水を高温に沸き上げる沸き上げ開始スイッチ３８、給湯温度を設定する温度設定スイッチ３９、浴槽２５への湯張りを指示する湯張りスイッチ４０、湯張り量を設定する湯張り量設定スイッチ４１、給湯混合弁１７及び風呂混合弁１８の交換時に交換モードを開始させる交換モード開始手段としての混合弁交換スイッチ４２を有し、更にドットマトリクス型の蛍光表示管よりなる表示部４３によって使用者が設定状況を目視可能としている。   Reference numeral 37 denotes a remote controller capable of various settings such as hot water supply and bath. A boiling start switch 38 for boiling hot water in the hot water storage tank 2 to a high temperature, a temperature setting switch 39 for setting hot water temperature, and hot water filling to the bathtub 25 are provided. A hot water filling switch 40 for instructing, a hot water filling amount setting switch 41 for setting the hot water filling amount, a mixing valve exchange switch 42 as an exchange mode starting means for starting an exchange mode when the hot water supply mixing valve 17 and the bath mixing valve 18 are exchanged. In addition, the user can visually check the setting status by the display unit 43 formed of a dot matrix type fluorescent display tube.

４４は混合弁交換スイッチ４２を押圧した際に各種制御を行う混合弁制御部であり、混合弁交換スイッチ４２が押圧されたか判断する押圧検知手段４５、配管に設置された各種弁の開口方向や開閉の調節等の制御を行う弁開口方向調節手段４６が備えられている。なお、混合弁交換スイッチ４２は混合弁制御部４４の基板上に備えられていてもよい。   44 is a mixing valve control unit that performs various controls when the mixing valve replacement switch 42 is pressed, a pressure detecting means 45 that determines whether the mixing valve replacement switch 42 has been pressed, the opening direction of various valves installed in the piping, A valve opening direction adjusting means 46 for performing control such as opening / closing adjustment is provided. The mixing valve replacement switch 42 may be provided on the substrate of the mixing valve control unit 44.

４７は給水管４途中に設置され弁を閉止することで貯湯タンク２への給水流路を遮断可能な給水遮断手段としての電動式の閉止弁、４８は貯湯タンク２上部に連通した逃し弁、４９は給水管４に備えられた減圧弁であり、該減圧弁４９より上流には給水栓５０が設けられており、５１は貯湯タンク２底部に接続され湯水を外部に排水する排水弁である。   47 is an electric shut-off valve as a water supply shut-off means that is installed in the middle of the water supply pipe 4 and can shut off the water supply flow path to the hot water storage tank 2 by closing the valve, and 48 is a relief valve that communicates with the upper part of the hot water storage tank 2. 49 is a pressure reducing valve provided in the water supply pipe 4, a water tap 50 is provided upstream from the pressure reducing valve 49, and 51 is a drain valve connected to the bottom of the hot water storage tank 2 to drain hot water to the outside. .

次に、この発明の第１実施形態における混合弁交換時の動作を説明する。
まず、リモコン３７上に設置された交換モード開始手段としての混合弁交換スイッチ４２が押圧操作されたことを押圧検知手段４５で検知すると交換モードを開始して、弁開口方向調節手段４６が閉止弁４７を作動させ給水管４から貯湯タンク２への給水流路を遮断し、給湯混合弁１７の給水バイパス管１６側を閉塞させ、風呂混合弁１８の出湯管３側と給水バイパス管１６側とを５０％ずつ開口させる弁開度に調節する。 Next, the operation at the time of mixing valve replacement in the first embodiment of the present invention will be described.
First, when the pressing detection means 45 detects that the mixing valve replacement switch 42 as the replacement mode starting means installed on the remote controller 37 is pressed, the replacement mode is started and the valve opening direction adjusting means 46 is closed. 47 is operated, the water supply flow path from the water supply pipe 4 to the hot water storage tank 2 is shut off, the water supply bypass pipe 16 side of the hot water supply mixing valve 17 is closed, and the hot water supply pipe 3 side and the water supply bypass pipe 16 side of the bath mixing valve 18 are connected. Is adjusted to a valve opening degree at which 50% is opened.

各弁の調節終了後、作業者が図示しない貯湯タンクユニット１のブレーカをＯＦＦにしてから給湯栓１９を開栓することで、図２で示すように太線で示した給水が給水管４、給水バイパス管１６、風呂混合弁１８、出湯管３、給湯混合弁１７、給湯管２０を順次流通して給湯口２１から出湯する流路が形成される。なお、出湯管３内に存在する高温水は斜線で示した。   After the adjustment of each valve, the operator turns off the breaker of the hot water storage tank unit 1 (not shown) and then opens the hot water tap 19, so that the water supply indicated by the thick line as shown in FIG. A flow path is formed in which the bypass pipe 16, the bath mixing valve 18, the hot water supply pipe 3, the hot water supply mixing valve 17, and the hot water supply pipe 20 are sequentially distributed and discharged from the hot water supply port 21. In addition, the hot water which exists in the tapping pipe 3 is shown with the oblique line.

給湯栓１９を開栓した後、作業者が給湯口２１から出湯する湯水の温度が低下したことを確認したら給湯栓１９を閉栓し、更に給水栓５０を閉栓して給水管４への給水を遮断する。   After opening the hot water tap 19, when the operator confirms that the temperature of the hot water discharged from the hot water outlet 21 has dropped, the hot water tap 19 is closed, and the water tap 50 is further closed to supply water to the water supply pipe 4. Cut off.

給湯栓１９及び給水栓５０を閉栓した後、作業者が逃し弁４８を開放してから排水弁５１を開放することで、図３で示すように出湯管３内の斜線で示した高温水が排水され、数秒間（２〜３秒間）の排水時間が経過したら排水弁５１を閉止する。   After closing the hot water tap 19 and the water tap 50, the operator opens the relief valve 48 and then opens the drain valve 51, so that the hot water indicated by the hatched lines in the hot water outlet pipe 3 as shown in FIG. When the water is drained and a draining time of several seconds (2 to 3 seconds) elapses, the drain valve 51 is closed.

排水弁５１を閉止した後、作業者によって異常が発生している給湯混合弁１７と風呂混合弁１８のどちらか一方、あるいは両方の混合弁を取り外して、新規の混合弁を設置する交換作業を行う。   After the drain valve 51 is closed, one or both of the hot water mixing valve 17 and the bath mixing valve 18 in which an abnormality has occurred by the operator is removed, and an exchange operation is performed to install a new mixing valve. Do.

給湯混合弁１７及び風呂混合弁１８の交換作業終了後、作業者が再度給水栓５０を開栓することで、図４で示すように給水管４、給水バイパス管１６、出湯管３を順次流通する流路が形成されて貯湯タンク２上部から給水する。   After the replacement of the hot water mixing valve 17 and the bath mixing valve 18 is completed, the operator opens the water tap 50 again so that the water pipe 4, the water supply bypass pipe 16, and the hot water pipe 3 are sequentially distributed as shown in FIG. A flow path is formed to supply water from the upper part of the hot water storage tank 2.

給水栓５０を開栓して貯湯タンク２へ給水した後、逃し弁４８から湯水が溢れたことを作業者が確認したら、逃し弁４８を閉止して貯湯タンク２への給水を停止させる。   After the water tap 50 is opened and water is supplied to the hot water storage tank 2, when the operator confirms that hot water has overflowed from the relief valve 48, the relief valve 48 is closed to stop water supply to the hot water storage tank 2.

逃し弁４８を閉止した後、作業者がブレーカをＯＮにすると設定されていた交換モードが初期化動作によって解除され、図５に示すように閉止弁４７を開放して給水管４から貯湯タンク２下部へ給水する流路が形成され、給湯混合弁１７及び風呂混合弁１８が初期設定の弁開度に戻されることで交換モードが終了する。   When the operator turns on the breaker after closing the relief valve 48, the exchange mode that has been set is canceled by the initialization operation, and the shutoff valve 47 is opened as shown in FIG. A flow path for supplying water to the lower part is formed, and the hot water supply mixing valve 17 and the bath mixing valve 18 are returned to the initial valve openings, thereby completing the exchange mode.

以上の動作によって、給湯混合弁１７と風呂混合弁１８のどちらか一方、もしくは両方の交換作業時に、給水管４途中に設置した閉止弁４７を閉止して貯湯タンク２への給水を遮断し、給湯混合弁１７及び風呂混合弁１８を所定の弁開度に調節することで、各混合弁に接続されている出湯管３へ低温の給水が流入して冷却されるので、作業者が各混合弁の取り外し作業を行う際に火傷を負う危険が防止され、また、貯湯タンク２から湯水を排水する時間が数秒なので排水量を最小限に抑えられる。   With the above operation, when either or both of the hot water mixing valve 17 and the bath mixing valve 18 are replaced, the shutoff valve 47 installed in the middle of the water supply pipe 4 is closed to shut off the water supply to the hot water storage tank 2. By adjusting the hot water mixing valve 17 and the bath mixing valve 18 to a predetermined valve opening, low temperature water flows into the outlet pipe 3 connected to each mixing valve and cools, so that the operator The risk of being burned when the valve is removed is prevented, and the time for draining hot water from the hot water storage tank 2 is several seconds, so the amount of drainage can be minimized.

次に、この発明の第２実施形態における混合弁交換時の動作を説明する。
本実施形態では混合弁交換スイッチ４２が押圧操作されたことを押圧検知手段４５で検知すると交換モードを開始して、閉止弁４７によって給水流路を遮断した後に、給湯混合弁１７の出湯管３側と給水バイパス管１６側を５０％ずつ開口させる弁開度に調節し、風呂混合弁１８の給水バイパス管１６側を閉塞させてから湯張り弁３２を開放することで、図６で示されるように給水管４内の給水が給水バイパス管１６、出湯管３、湯張り管３０を順次流通して浴槽２５内に流入する流路が形成される。 Next, the operation at the time of replacement of the mixing valve in the second embodiment of the present invention will be described.
In this embodiment, when the pressing detection means 45 detects that the mixing valve replacement switch 42 has been pressed, the replacement mode is started and the water supply passage is shut off by the closing valve 47, and then the hot water outlet pipe 3 of the hot water mixing valve 17. As shown in FIG. 6, the valve opening degree is adjusted to 50% for each side and the water supply bypass pipe 16 side, and the hot water supply valve 32 is opened after the water supply bypass pipe 16 side of the bath mixing valve 18 is closed. In this way, a flow path is formed in which the water supply in the water supply pipe 4 flows through the water supply bypass pipe 16, the hot water discharge pipe 3, and the hot water filling pipe 30 in order and flows into the bathtub 25.

そして、作業者が浴槽２５内に流入した湯水の温度が低下したと判断したら、再度混合弁交換スイッチ４２を押圧して湯張り弁３２を閉止させ、ブレーカをＯＦＦにしてから給水栓５０を閉栓して、数秒間排水弁５１を開放して湯水を排水た後、給湯混合弁１７と風呂混合弁１８のどちらか一方、あるいは両方を交換する。   When the operator determines that the temperature of the hot water flowing into the bathtub 25 has decreased, the mixing valve replacement switch 42 is pressed again to close the hot water filling valve 32, and after the breaker is turned off, the water tap 50 is closed. Then, after draining the drain valve 51 for several seconds to drain hot water, either one or both of the hot water mixing valve 17 and the bath mixing valve 18 are replaced.

以上の動作によって、給湯混合弁１７と風呂混合弁１８のどちらか一方、あるいは両方の交換作業時に作業者が火傷を負う危険を防止し安全な交換作業の実施が可能となり、また、貯湯タンク２から排水する湯水の量を最小限に抑えられる。   By the above operation, it is possible to prevent the operator from being burned when replacing one or both of the hot water mixing valve 17 and the bath mixing valve 18, and to perform a safe replacement operation. The amount of hot water drained from can be minimized.

次に、この発明を適用した第３実施形態を図７に基づいて説明する。
本実施形態では閉止弁４７を手動式とし、作業者が閉止弁４７を閉止することで給水管４から貯湯タンク２への給水を遮断する。このため、各混合弁の交換作業時に混合弁交換スイッチ４２を押圧操作して交換モードに入る前に、作業者が閉止弁４７を閉止する必要がある。 Next, a third embodiment to which the present invention is applied will be described with reference to FIG.
In this embodiment, the shut-off valve 47 is manually operated, and the operator shuts off the shut-off valve 47 to shut off the water supply from the water supply pipe 4 to the hot water storage tank 2. For this reason, it is necessary for the operator to close the closing valve 47 before pressing the mixing valve replacement switch 42 to enter the replacement mode when replacing each mixing valve.

また、混合弁の交換作業が終了した後に給水栓５０を開栓して貯湯タンク２へ給水し、逃し弁４８から湯水が溢れたことを確認したら逃し弁４８を閉止して、その後、作業者がブレーカを操作してＯＮにする前に、作業者が閉止弁４７を開放して給水管４から貯湯タンク２下部への流路が形成されるようにする。   Further, after the mixing valve replacement operation is completed, the water tap 50 is opened to supply water to the hot water storage tank 2, and when it is confirmed that hot water has overflowed from the relief valve 48, the relief valve 48 is closed. Before operating the breaker and turning it ON, the operator opens the shutoff valve 47 so that a flow path from the water supply pipe 4 to the lower part of the hot water storage tank 2 is formed.

以上の動作によって、給湯混合弁１７と風呂混合弁１８のどちらか一方、あるいは両方の交換作業時に作業者が火傷を負う危険を防止し安全な交換作業の実施が可能となり、また、貯湯タンク２から排水する湯水の量を最小限に抑えられる。   By the above operation, it is possible to prevent the operator from being burned when replacing one or both of the hot water mixing valve 17 and the bath mixing valve 18, and to perform a safe replacement operation. The amount of hot water drained from can be minimized.

なお、交換モード時に給湯混合弁１７もしくは風呂混合弁１８のどちらか一方の出湯管３側と給水バイパス管１６側を５０％ずつ開口させるとしたが、給水バイパス管１６側と出湯管３側が連通しており、給水が給水バイパス管１６から出湯管３へ流通可能であれば弁開度を変更してもよい。   In the replacement mode, either the hot water supply mixing pipe 17 or the bath mixing valve 18 is opened by 50% each on the side of the hot water supply pipe 3 and the side of the hot water supply bypass pipe 16, but the side of the hot water supply bypass pipe 16 and the side of the hot water supply pipe 3 communicate with each other. However, the valve opening degree may be changed as long as the water supply can flow from the water supply bypass pipe 16 to the hot water discharge pipe 3.

また、交換モード時に給水を出湯管３に流通させて冷却する際、作業者が給湯栓１９を開栓しても湯水が出湯しなければ、給湯混合弁１７は出湯管３側を全開にしているが、風呂混合弁１８が出湯管３側もしくは給水バイパス管１６側を全開にしていると考えられるため、少なくとも風呂混合弁１８に異常があると判断でき、さらに、交換モード時に給湯栓１９を開栓すると高温湯の出湯がなく低温水のみ継続して出湯していれば、風呂混合弁１８の弁開度にかかわらず給湯混合弁１７が給水バイパス管１６側を全開にしていると考えられるため、少なくとも給湯混合弁１７に異常があると判断できる。   In addition, when water is supplied to the tap pipe 3 and cooled in the exchange mode, if hot water does not come out even when the operator opens the hot water tap 19, the hot water mixing valve 17 opens the side of the tap pipe 3 fully. However, since the bath mixing valve 18 is considered to be fully open on the side of the hot water discharge pipe 3 or the water supply bypass pipe 16, it can be determined that at least the bath mixing valve 18 is abnormal, and the hot water tap 19 is turned on in the exchange mode. If the hot water is not discharged and only the low temperature water is continuously discharged when the plug is opened, it is considered that the hot water supply mixing valve 17 fully opens the water supply bypass pipe 16 regardless of the valve opening degree of the bath mixing valve 18. It can be determined that at least the hot water mixing valve 17 is abnormal.

以上のように、給湯混合弁１７と風呂混合弁１８のどちらか一方、もしくは両方の交換作業時に、給水管４途中に設置した閉止弁４７を閉止して貯湯タンク２への給水を遮断し、給湯混合弁１７及び風呂混合弁１８を所定の弁開度に調節することで、各混合弁に接続されている出湯管３に低温の給水が流入して冷却されることで、作業者が混合弁を交換する際に火傷を負う危険を防止することができ、さらに、貯湯タンク２から排水する湯水の量を最小限に抑えられる。   As described above, at the time of exchanging one or both of the hot water mixing valve 17 and the bath mixing valve 18, the shutoff valve 47 installed in the middle of the water supply pipe 4 is closed to shut off the water supply to the hot water storage tank 2, By adjusting the hot water supply mixing valve 17 and the bath mixing valve 18 to a predetermined valve opening degree, the cold water supply flows into the outlet pipe 3 connected to each mixing valve and is cooled, so that the operator can mix. The risk of burns when replacing the valve can be prevented, and the amount of hot water drained from the hot water storage tank 2 can be minimized.

２ 貯湯タンク
３ 出湯管
４ 給水管
５ ヒートポンプユニット
１７ 給湯混合弁
１８ 風呂混合弁
１９ 給湯栓
２０ 給湯管
３０ 湯張り管
４７ 閉止弁
４８ 逃し弁
５０ 給水栓
５１ 排水弁 DESCRIPTION OF SYMBOLS 2 Hot water storage tank 3 Hot water pipe 4 Water supply pipe 5 Heat pump unit 17 Hot water supply mixing valve 18 Bath mixing valve 19 Hot water tap 20 Hot water supply pipe 30 Hot water filling pipe 47 Shut-off valve 48 Relief valve 50 Water supply tap 51 Drain valve

Claims (3)

湯水を貯湯する貯湯タンクと、前記貯湯タンク内の湯水を加熱するヒートポンプユニットと、前記貯湯タンクに給水する給水管と、前記給水管から分岐した給水バイパス管と、前記給水管に給水を流入する給水栓と、前記貯湯タンク内の湯水を出湯する出湯管と、前記出湯管内の湯水と前記給水バイパス管内の給水とを混合して給湯管に供給する給湯混合弁と、前記出湯管内の湯水と前記給水バイパス管内の給水とを混合して湯張り管に供給する風呂混合弁と、前記給湯管内の湯水を出湯する給湯栓と、前記貯湯タンク内の湯水を排水する排水弁と、前記貯湯タンク内の圧力上昇を逃がす逃し弁と、前記給水管と前記給水バイパス管との分岐点の下流側途中に設置され前記貯湯タンクへの給水を遮断する給水遮断手段と、前記給湯混合弁及び前記風呂混合弁の交換モードを開始する交換モード開始手段とを備えたヒートポンプ式給湯機において、前記交換モード開始手段による交換モードの開始を検知したら、前記給水遮断手段によって前記貯湯タンクへの給水を遮断し、前記給湯混合弁の前記給水バイパス管側を閉塞させ、前記風呂混合弁の前記出湯管側と前記給水バイパス管側とを連通させる弁開度に調節することを特徴とするヒートポンプ式給湯機。 A hot water storage tank that stores hot water, a heat pump unit that heats the hot water in the hot water storage tank, a water supply pipe that supplies water to the hot water storage tank, a water supply bypass pipe that branches from the water supply pipe, and water that flows into the water supply pipe A water tap, a hot water pipe for discharging hot water in the hot water storage tank, a hot water mixing valve for mixing hot water in the hot water pipe and water in the water supply bypass pipe to supply the hot water pipe, hot water in the hot water pipe, A bath mixing valve that mixes the water supply in the water supply bypass pipe and supplies the hot water pipe to the hot water supply pipe, a hot water tap that discharges the hot water in the hot water supply pipe, a drain valve that drains the hot water in the hot water storage tank, and the hot water storage tank a relief valve releasing the pressure increase of the inner, and water supply interrupting means for interrupting the water supply to the hot water storage tank disposed downstream the middle of the branch point of the water supply bypass pipe and the water supply pipe, the hot water supply mixing valve and In a heat pump type hot water heater provided with an exchange mode start means for starting the exchange mode of the bath mixing valve, when the start of the exchange mode by the exchange mode start means is detected, water supply to the hot water storage tank is performed by the water supply shut-off means. Heat pump hot water supply characterized in that it is shut off, the water supply bypass pipe side of the hot water supply mixing valve is closed, and the valve opening degree that connects the hot water supply pipe side and the water supply bypass pipe side of the bath mixing valve is adjusted. Machine. 湯水を貯湯する貯湯タンクと、前記貯湯タンク内の湯水を加熱するヒートポンプユニットと、前記貯湯タンクに給水する給水管と、前記給水管から分岐した給水バイパス管と、前記給水管に給水を流入する給水栓と、前記貯湯タンク内の湯水を出湯する出湯管と、前記出湯管内の湯水と前記給水バイパス管内の給水とを混合して給湯管に供給する給湯混合弁と、前記出湯管内の湯水と前記給水バイパス管内の給水とを混合して湯張り管に供給する風呂混合弁と、前記給湯管内の湯水を出湯する給湯栓と、前記貯湯タンク内の湯水を排水する排水弁と、前記貯湯タンク内の圧力上昇を逃がす逃し弁と、前記給水管と前記給水バイパス管との分岐点の下流側途中に設置され前記貯湯タンクへの給水を遮断する給水遮断手段と、前記給湯混合弁及び前記風呂混合弁の交換モードを開始する交換モード開始手段とを備えたヒートポンプ式給湯機において、前記交換モード開始手段による交換モードの開始を検知したら、前記給水遮断手段によって前記貯湯タンクへの給水を遮断し、前記給湯混合弁の前記出湯管側と前記給水バイパス管側とを連通させ、前記風呂混合弁の前記給水バイパス管側を閉塞させる弁開度に調節することを特徴とするヒートポンプ式給湯機。 A hot water storage tank that stores hot water, a heat pump unit that heats the hot water in the hot water storage tank, a water supply pipe that supplies water to the hot water storage tank, a water supply bypass pipe that branches from the water supply pipe, and water that flows into the water supply pipe A water tap, a hot water pipe for discharging hot water in the hot water storage tank, a hot water mixing valve for mixing hot water in the hot water pipe and water in the water supply bypass pipe to supply the hot water pipe, hot water in the hot water pipe, A bath mixing valve that mixes the water supply in the water supply bypass pipe and supplies the hot water pipe to the hot water supply pipe, a hot water tap that discharges the hot water in the hot water supply pipe, a drain valve that drains the hot water in the hot water storage tank, and the hot water storage tank a relief valve releasing the pressure increase of the inner, and water supply interrupting means for interrupting the water supply to the hot water storage tank disposed downstream the middle of the branch point of the water supply bypass pipe and the water supply pipe, the hot water supply mixing valve and In a heat pump type hot water heater provided with an exchange mode start means for starting the exchange mode of the bath mixing valve, when the start of the exchange mode by the exchange mode start means is detected, water supply to the hot water storage tank is performed by the water supply shut-off means. blocked, the said pouring tube side of the hot water supply mixing valve communicates with said water supply bypass pipe side, heat pump water heater, characterized in that to adjust the valve opening to close the water supply bypass pipe side of the bath mixing valve Machine. 前記給水遮断手段を手動の閉止弁で構成することを特徴とする前記請求項１または２記載のヒートポンプ式給湯機。   The heat pump type hot water heater according to claim 1 or 2, wherein the water supply shut-off means is constituted by a manual shut-off valve.
JP2010092703A 2010-04-14 2010-04-14 Heat pump water heater Expired - Fee Related JP5421181B2 (en)

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FR3108414B1 (en) * 2020-03-18 2022-06-10 Vernet Instrumented device for a mixer tap, as well as mixer tap comprising such an instrumented device

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