JP5257059B2 - Hot water storage water heater - Google Patents

Hot water storage water heater Download PDF

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JP5257059B2
JP5257059B2 JP2008330051A JP2008330051A JP5257059B2 JP 5257059 B2 JP5257059 B2 JP 5257059B2 JP 2008330051 A JP2008330051 A JP 2008330051A JP 2008330051 A JP2008330051 A JP 2008330051A JP 5257059 B2 JP5257059 B2 JP 5257059B2
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hot water
mixing valve
water supply
bath
water storage
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JP2010151377A (en
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利幸 佐久間
忠 宇佐見
二朗 北山
貴弘 栗田
康史 本庄
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Mitsubishi Electric Corp
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Description

本発明は、台所などに供給するための給湯用混合弁と、風呂専用に供給する風呂用混合弁とを備えた貯湯式給湯装置に関するものである。   The present invention relates to a hot water storage type hot water supply apparatus provided with a mixing valve for hot water supply for supplying to a kitchen and the like, and a mixing valve for bath supplied exclusively for a bath.

従来の貯湯式給湯装置では、貯湯タンクから供給される温水と冷水とを混合して給湯管から台所などに供給する給湯用混合弁と、貯湯タンクから供給される温水と冷水とを混合して風呂給湯管から風呂専用に供給する風呂用混合弁とを備えており、これら２つの混合弁は、1つのバルブボディに一体的に組み込むことでモジュール化し、混合弁装置を構成している。（例えば、特許文献１参照）。
特開２００８−１３８８８８号公報 In a conventional hot water storage type hot water supply apparatus, hot water and cold water supplied from a hot water storage tank are mixed and mixed with a hot water mixing valve supplied from a hot water pipe to a kitchen, etc., and hot water and cold water supplied from a hot water storage tank are mixed. A bath mixing valve that is supplied exclusively from the bath hot water supply pipe is provided. These two mixing valves are integrated into one valve body to be modularized to form a mixing valve device. (For example, refer to Patent Document 1).
JP 2008-138888 A

しかしながら、上記した従来の貯湯式給湯装置において、モジュール化された混合弁装置には、その湯入口部と水入口部にはそれぞれ湯水の回り込み防止用の逆止弁を備えている。このため、長期不使用などで、貯湯タンク内の水抜きを行った際、前記混合弁装置内には逆止弁の存在によって給湯用混合弁と風呂用混合弁と逆止弁との間の流路内にある水が逃げ場を失って配管内に残水してしまい、この残水が冬季に凍結してしまうことによって給湯用混合弁や風呂用混合弁の破壊に繋がるという問題点があった。   However, in the above-described conventional hot water storage type hot water supply device, the modularized mixing valve device is provided with a check valve for preventing the hot water from flowing into the hot water inlet portion and the water inlet portion, respectively. For this reason, when water is drained from the hot water storage tank for a long period of non-use, etc., there is a check valve in the mixing valve device between the hot water mixing valve, the bath mixing valve and the check valve. There is a problem that the water in the flow path loses escape space and remains in the piping, and this residual water freezes in the winter, leading to the destruction of the hot water mixing valve and bath mixing valve. It was.

本発明は上記従来の問題点に鑑みて成されたものであり、水抜き時の混合弁装置内の残水を少なくでき、凍結による給湯用混合弁や風呂用混合弁の破損を確実に防止できる貯湯式給湯装置を提供することにある。   The present invention has been made in view of the above-mentioned conventional problems, can reduce the residual water in the mixing valve device when draining water, and reliably prevent the hot water mixing valve and the bath mixing valve from being damaged by freezing. The object is to provide a hot water storage type hot water supply device that can be used.

上記、目的を達成するために、本発明では、加熱装置によって加熱された給湯用の温水を貯える貯湯タンクと、貯湯タンクから供給される温水と給水管から供給される冷水とを混合して給湯管から供給する温水の温度調節を行う給湯用混合弁と、貯湯タンクから供給される温水と給水管から供給される冷水とを混合して風呂給湯管から供給する温水の温度調節を行う風呂用混合弁とを備え、前記給湯用混合弁と風呂用混合弁とを1つのバルブボディに組み込んでモジュール化し、混合弁装置を構成している貯湯式給湯装置において、前記混合弁装置の給湯用混合弁を風呂用混合弁よりも低い位置に配置したことを特徴としている。   In order to achieve the above object, in the present invention, a hot water storage tank for storing hot water for hot water supply heated by a heating device, hot water supplied from the hot water storage tank, and cold water supplied from a water supply pipe are mixed. Hot water supply mixing valve that adjusts the temperature of hot water supplied from the pipe and hot water supplied from the hot water storage tank and hot water supplied from the hot water storage tank are mixed with cold water supplied from the hot water supply pipe. In a hot water storage type hot water supply apparatus comprising a mixing valve, the hot water supply mixing valve and the bath mixing valve are incorporated into a single valve body and modularized, and the mixing valve apparatus is mixed for hot water supply The valve is arranged at a position lower than the mixing valve for bath.

この発明によれば、貯湯タンクの水抜き時、混合弁装置内の残水をより少なくすることができ、凍結による給湯用混合弁や風呂用混合弁の破損を確実に防止できる。   According to the present invention, when the hot water storage tank is drained, the remaining water in the mixing valve device can be reduced, and the hot water mixing valve and the bath mixing valve can be reliably prevented from being damaged by freezing.

実施の形態１.
以下、本発明の実施の形態について添付した図面を参照しながら詳細に説明する。
図１は、本発明の実施の形態１における貯湯式給湯装置の全体構成図であり、図２は本発明における混合弁装置の概略構造を示す斜視図で、図３は、本発明における混合弁装置のボディの概略構造を示す断面図である。 Embodiment 1.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is an overall configuration diagram of a hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing a schematic structure of a mixing valve apparatus according to the present invention, and FIG. 3 is a mixing valve according to the present invention. It is sectional drawing which shows schematic structure of the body of an apparatus.

加熱装置２によって加熱された給湯用の温水を貯える貯湯タンク１と、貯湯タンク１から供給される温水と給水バイパス管６から供給される冷水とを混合して給湯管９から供給する温水の温度調節を行う給湯用混合弁７と、貯湯タンク１から供給される温水と給水バイパス管６から供給される冷水とを混合して風呂給湯管１０から供給する温水の温度調節を行う風呂用混合弁８とを備えた貯湯式給湯装置である。   The temperature of the hot water supplied from the hot water supply pipe 9 by mixing the hot water storage tank 1 for storing hot water for hot water supply heated by the heating device 2, the hot water supplied from the hot water storage tank 1 and the cold water supplied from the water supply bypass pipe 6. Mixing valve 7 for hot water supply for adjusting, and mixing valve for bath for adjusting temperature of hot water supplied from bath hot water supply pipe 10 by mixing hot water supplied from hot water storage tank 1 and cold water supplied from water supply bypass pipe 6 8 is a hot water storage type hot water supply apparatus.

そして、本発明の要部として、混合弁装置５は、図２、図３に示すように、給湯用混合弁７と風呂用混合弁８とを１つのボディ１４に一体的に組み込むことによりモジュール化して構成している。この混合弁装置５は、ボディ１４と、このボディ１４内に弁体１５及び１６を回動可能に設けた給湯用混合弁７と風呂用混合弁８とで構成される。   As a main part of the present invention, the mixing valve device 5 includes a module by integrating the hot water mixing valve 7 and the bath mixing valve 8 into one body 14 as shown in FIGS. It is structured. The mixing valve device 5 includes a body 14, a hot water supply mixing valve 7 in which valve bodies 15 and 16 are rotatably provided in the body 14, and a bath mixing valve 8.

前記ボディ１４は、垂直方向に向かう1本の直管状の流入側ボディ部１４ａと水平方向に向かう２つの直管状の流出側ボディ部１４ｂ、１４ｃとで構成されている。垂直方向の流入側ボディ部１４ａの内部には、前記給湯用混合弁７と風呂用混合弁８のそれぞれの弁体１５、弁体１６への通水経路を独立した流路に分岐させる仕切り１４ｄが設けられており、その流路断面がおおむね二分されるように構成されている。また、２つの流出側ボデイ部１４ｂ、１４ｃは上下方向に所定距離ｈをずらした状態で水平方向に設けられている。そして、流入側ボディ部１４ａと流出側ボディ部１４ｂ、１４ｃとが合流する部分に位置して前記給湯用混合弁７と風呂用混合弁８の各弁体１５、１６が配置されるように構成されている。なお、ボディ１４、弁体１５，１６は金属あるいは樹脂の射出成形等で一体形成される。   The body 14 is composed of one straight tubular inflow side body portion 14a extending in the vertical direction and two straight tubular outflow side body portions 14b and 14c extending in the horizontal direction. Inside the vertical inflow side body portion 14a, there is a partition 14d that branches the water flow paths to the valve body 15 and the valve body 16 of the hot water mixing valve 7 and the bath mixing valve 8 into independent flow paths. Is provided, and the cross section of the flow path is roughly divided into two. The two outflow side body portions 14b and 14c are provided in the horizontal direction with a predetermined distance h shifted in the vertical direction. The valve bodies 15 and 16 of the hot water supply mixing valve 7 and the bath mixing valve 8 are arranged at the portion where the inflow side body portion 14a and the outflow side body portions 14b and 14c merge. Has been. The body 14 and the valve bodies 15 and 16 are integrally formed by metal or resin injection molding.

前記ボディ１４の流入側ボディ部１４ａの両端部に湯流入口１９と水流入口２０を有する。一方、流出側ボディ部１４ｂ、１４ｃの端部に流出口２１、２２を有する。湯流入口２１が出湯管４と接続され、水流入口２０が給水バイパス管６と接続される。また、２つの流出口２１，２２のうち、流出口２１は給湯管９と接続され、もう一方の流出口２２は風呂給湯管１０と接続される。そして、前記湯流入口１５と前記給湯用混合弁７及び風呂用混合弁８との間、及び前記水流入口１６と前記給湯用混合弁７及び風呂用混合弁８との間には回り込み防止用の湯側逆止弁２３と水側逆止弁２４とが設けられる。   A hot water inlet 19 and a water inlet 20 are provided at both ends of the inflow side body portion 14 a of the body 14. On the other hand, outlets 21 and 22 are provided at end portions of the outflow side body portions 14b and 14c. The hot water inlet 21 is connected to the hot water outlet pipe 4, and the water inlet 20 is connected to the water supply bypass pipe 6. Of the two outlets 21 and 22, the outlet 21 is connected to the hot water supply pipe 9, and the other outlet 22 is connected to the bath hot water supply pipe 10. And, between the hot water inlet 15 and the hot water mixing valve 7 and the bath mixing valve 8, and between the water inlet 16 and the hot water mixing valve 7 and the bath mixing valve 8, a wraparound prevention is provided. A hot water side check valve 23 and a water side check valve 24 are provided.

貯湯タンク１の底部には排水管１９が接続され、この排水管１９には手動で開閉される排水栓２０が設けられている。一方、給水管３にも同じく手動で開閉される止水栓２１が設けられており、前記止水栓２１を閉じ、前記排水栓２０を開くことによって、貯湯タンク１内の水抜きができる。   A drain pipe 19 is connected to the bottom of the hot water storage tank 1, and a drain plug 20 that is manually opened and closed is provided in the drain pipe 19. On the other hand, the water supply pipe 3 is also provided with a stop cock 21 that can be manually opened and closed. By closing the stop cock 21 and opening the drain plug 20, the water in the hot water storage tank 1 can be drained.

給湯機能は、図１に示すように、給湯用水を内部に貯える貯湯タンク１と、この貯湯タンク１内の最下部から低温の給湯用水を取り出し、高温にして貯湯タンク１内の最上部に送る給湯用水加熱回路１２と、この給湯用水加熱回路１２を流れる給湯用水を加熱する加熱装置としてのヒートポンプ熱源機２と、貯湯タンク１内に水道水を給水する給水管３と、貯湯タンク１内の高温水を導出する出湯管４と、給湯管９・風呂給湯管１０とから構成されている。給湯用加熱回路１２には循環ポンプ１３が設けられ、風呂給湯管１０には風呂電磁弁２５が設けられている。   As shown in FIG. 1, the hot water supply function has a hot water storage tank 1 for storing hot water supply water therein, and takes out low-temperature hot water supply water from the lowermost part of the hot water storage tank 1 and sends it to the uppermost part of the hot water storage tank 1 at a high temperature. A hot water supply water heating circuit 12, a heat pump heat source device 2 as a heating device for heating hot water supply water flowing through the hot water supply water heating circuit 12, a water supply pipe 3 for supplying tap water into the hot water storage tank 1, and a hot water storage tank 1 A hot water discharge pipe 4 for deriving high temperature water, a hot water supply pipe 9 and a bath hot water supply pipe 10 are constituted. The hot water supply heating circuit 12 is provided with a circulation pump 13, and the bath hot water supply pipe 10 is provided with a bath electromagnetic valve 25.

給湯機能を構成する構成部品についてより具体的に説明する。
先ず、給水管３には、給水温度を検出する給水サーミスタ１１が設けられており、給水管３内の温度情報を制御装置２６に出力するようになっている。また、給水管３には、本給湯装置に導入する水道水の水圧を所定圧となるように調節するとともに、断水などにおける湯の逆流を防止する減圧（逆止）弁２７が設けられている。そして給水管３は、その先で給水バイパス管６が分岐され、この給水バイパス管６の先端が混合弁装置５の水流入口１６に接続されている。 The components constituting the hot water supply function will be described more specifically.
First, the feed water thermistor 11 for detecting the feed water temperature is provided in the feed water pipe 3, and temperature information in the feed water pipe 3 is output to the control device 26. In addition, the water supply pipe 3 is provided with a pressure reducing (return) valve 27 for adjusting the water pressure of the tap water introduced into the hot water supply device to a predetermined pressure and preventing the backflow of hot water in the case of water interruption. . The feed water pipe 3 branches from the feed water bypass pipe 6 at the tip, and the tip of the feed water bypass pipe 6 is connected to the water inlet 16 of the mixing valve device 5.

貯湯タンク１は、縦長形状の耐食性に優れた金属製（例えば、ステンレス製）の容器で形成され、外周にタンク保温部材が配設され、高温の給湯用水を長時間にわたって保温できるようになっている。また、貯湯タンク１内の底面には給水管３が接続されて、貯湯タンク１内に給水するようになっている。   The hot water storage tank 1 is formed of a vertically long metal (for example, stainless steel) container having excellent corrosion resistance, and a tank heat insulating member is provided on the outer periphery so that hot water for hot water can be kept warm for a long time. Yes. A water supply pipe 3 is connected to the bottom surface of the hot water storage tank 1 to supply water into the hot water storage tank 1.

貯湯タンク１内の給湯用水を加熱するヒートポンプ熱源機２は、例えば、二酸化炭素（ＣＯ２）ガスを冷媒として使用することにより、高圧側の冷媒圧力が冷媒の臨界圧力以上となる超臨界ヒートポンプサイクルを使用している。このヒートポンプサイクルは、周知のように図示しない冷媒圧縮機・冷媒凝縮器としての冷媒水交換器・膨張弁・冷媒蒸発器およびアキュムレータなどの冷凍サイクル機能部品より構成されている。   The heat pump heat source unit 2 that heats hot water in the hot water storage tank 1 uses a supercritical heat pump cycle in which, for example, carbon dioxide (CO2) gas is used as a refrigerant, so that the refrigerant pressure on the high-pressure side becomes equal to or higher than the critical pressure of the refrigerant. I use it. As is well known, this heat pump cycle is composed of refrigeration cycle functional parts such as a refrigerant compressor, refrigerant water exchanger, expansion valve, refrigerant evaporator and accumulator (not shown).

ちなみに、冷媒圧縮機は、内蔵する電動モータによって駆動され、アキュムレータより吸引した気相冷媒を臨界圧力以上まで圧縮して吐出する。冷媒水交換器は、冷媒と給湯用水とを熱交換して給湯用水を加熱するもので、例えば、冷媒が流れる冷媒通路と給湯用水が流れる給湯用水通路とが二重管構造で設けられ、且つ冷媒の流れ方向と給湯用水の流れ方向とが対向するように構成された対向流式の冷媒水交換器である。   Incidentally, the refrigerant compressor is driven by a built-in electric motor, and compresses and discharges the gas-phase refrigerant sucked from the accumulator to a critical pressure or more. The refrigerant water exchanger heats hot water supply water by exchanging heat between the refrigerant and hot water supply water.For example, a refrigerant passage through which a refrigerant flows and a hot water supply water passage through which hot water supply flows are provided in a double-pipe structure, and This is a counter flow type refrigerant water exchanger configured such that the flow direction of the refrigerant and the flow direction of the hot water supply water face each other.

膨張弁は、冷媒水交換器から流出する冷媒を減圧して冷媒蒸発器に供給する。冷媒蒸発器は、膨張弁で減圧された冷媒を大気との熱交換によって蒸発させる。アキュムレータは、冷媒蒸発器より流出する冷媒を気液分離して、気相冷媒のみ冷媒圧縮機に吸引させるとともに、サイクル中の余剰冷媒を蓄えるものである。   The expansion valve decompresses the refrigerant flowing out from the refrigerant water exchanger and supplies it to the refrigerant evaporator. The refrigerant evaporator evaporates the refrigerant decompressed by the expansion valve by heat exchange with the atmosphere. The accumulator performs gas-liquid separation of the refrigerant flowing out from the refrigerant evaporator so that only the gas-phase refrigerant is sucked into the refrigerant compressor and stores excess refrigerant in the cycle.

また、冷媒水交換器の給湯用水通路は、上述した給湯用水加熱回路１２を介して貯湯タンク１に接続されており、循環ポンプ１３が作動することで、貯湯タンク１内の給湯用水が循環する。尚、給湯用水加熱回路１２の上流端が貯湯タンク１の底部に接続され、給湯用水加熱回路１２の下流端が貯湯タンク１の上部に接続されている。これにより、冷媒水交換器で冷媒との熱交換により加熱された給湯用水が貯湯タンク１の上部へ送り込まれるため、貯湯タンク１の上部側から下部側へ向かって順次高温水が積層して蓄熱されてゆく。   Further, the hot water supply water passage of the refrigerant water exchanger is connected to the hot water storage tank 1 via the hot water supply water heating circuit 12 described above, and the hot water in the hot water storage tank 1 circulates when the circulation pump 13 is activated. . The upstream end of the hot water supply water heating circuit 12 is connected to the bottom of the hot water storage tank 1, and the downstream end of the hot water supply water heating circuit 12 is connected to the top of the hot water storage tank 1. Thereby, the hot water supply water heated by the heat exchange with the refrigerant in the refrigerant water exchanger is sent to the upper part of the hot water storage tank 1, so that high temperature water is sequentially stacked from the upper side to the lower side of the hot water storage tank 1 to store the heat. It will be done.

そして、貯湯タンク１の外壁面には、給湯用水の貯湯量、もしくは貯湯温度を検出するための水温センサである複数の貯湯サーミスタ２８、２９、３０、３１が縦方向（タンクの高さ方向）にほぼ等間隔に配置され、貯湯タンク１内に満たされた給湯用水の各水位レベルでの温度情報を制御装置（図示せず）に出力するようにしている。   On the outer wall surface of the hot water storage tank 1, a plurality of hot water storage thermistors 28, 29, 30, and 31 serving as water temperature sensors for detecting the amount of hot water for storing hot water or the temperature of the hot water are provided in the vertical direction (tank height direction). The temperature information at each water level of hot water supply water filled in the hot water storage tank 1 is output to a control device (not shown).

従って、制御装置２６は、複数の貯湯サーミスタ２８、２９、３０、３１からの温度情報に基づき、貯湯タンク１内上方の沸き上げられた湯温と、貯湯タンク１内下方の沸き上げられる前の低温の給湯用水との温度境界層位置を検出することができるとともに、各水位レベルでの給湯用水の湯温が検出できる。尚、複数の貯湯サーミスタのうち、最上部に設けられた貯湯サーミスタ２８は高温の給湯用水を出湯する出湯温度を検出する機能を有している。   Therefore, the control device 26, based on the temperature information from the plurality of hot water storage thermistors 28, 29, 30, 31, and the hot water heated in the upper part of the hot water storage tank 1 and before being heated in the lower part of the hot water storage tank 1. The temperature boundary layer position with the low-temperature hot water supply water can be detected, and the hot water temperature of the hot water supply at each water level can be detected. Of the plurality of hot water storage thermistors, the hot water storage thermistor 28 provided at the uppermost part has a function of detecting the temperature of hot water discharged from the hot water supply water.

尚、ヒートポンプ熱源機２は制御装置２６からの制御信号により作動されるとともに、作動状態を制御装置２１に出力するようになっている。また、これらの動力源として交流電力を用い、主に料金設定の最も安い深夜時間帯における深夜電力を用いて、貯湯タンク１内の給湯用水を沸き上げる蓄熱運転を行っているが、昼間時間帯においても給湯用水の湯温が低下してくると沸き上げ運転を行うよう制御される。ちなみに、超臨界ヒートポンプサイクルによれば、一般的なヒートポンプサイクルよりも高温（例えば、８５〜９０℃）の給湯用水を内部に貯えることができる。   The heat pump heat source device 2 is operated by a control signal from the control device 26 and outputs an operation state to the control device 21. In addition, the AC power is used as the power source, and the heat storage operation for boiling the hot water in the hot water storage tank 1 is performed mainly using the midnight power in the midnight time zone where the price setting is the cheapest. In this case, when the hot water temperature of the hot water is lowered, the boiling operation is controlled. Incidentally, according to the supercritical heat pump cycle, hot water supply water having a temperature higher than that of a general heat pump cycle (for example, 85 to 90 ° C.) can be stored therein.

貯湯タンク１の最上部には、高温の給湯用水を導出するための給湯経路である出湯管４が接続され、その下流端は混合弁装置５の湯流入口１５に接続されている。この湯流入口１５の下流側と、先の水流入口１６の下流側には給湯混合弁７および風呂混合弁８が並列に接続される。そして、給湯混合弁７で混合された温水の出口は流出口１７となり、流出口１７の下流側の給湯管９には、混合された温水の温度を検出する給湯サーミスタ３２が設けられている。   The hot water storage tank 1 is connected to a hot water supply pipe 4 that is a hot water supply path for deriving high-temperature hot water supply water, and its downstream end is connected to a hot water inlet 15 of the mixing valve device 5. A hot water supply mixing valve 7 and a bath mixing valve 8 are connected in parallel to the downstream side of the hot water inlet 15 and the downstream side of the previous water inlet 16. The outlet of the hot water mixed by the hot water supply mixing valve 7 becomes the outlet 17, and the hot water supply pipe 9 on the downstream side of the outlet 17 is provided with a hot water supply thermistor 32 that detects the temperature of the mixed hot water.

また、風呂混合弁８で混合された温水の出口は流出口１８となり、流出口１８の下流側の風呂給湯管１０には、混合された温水の温度を検出する風呂サーミスタ３３が設けられている。そして、これら給湯サーミスタ３２・風呂サーミスタ３３によって検出された温度情報は、制御装置２６に出力するようになっている。   Further, the outlet of the hot water mixed by the bath mixing valve 8 becomes an outlet 18, and the bath hot water pipe 10 on the downstream side of the outlet 18 is provided with a bath thermistor 33 that detects the temperature of the mixed hot water. . The temperature information detected by the hot water supply thermistor 32 and the bath thermistor 33 is output to the control device 26.

ところで、給湯混合弁７および風呂混合弁８は、給湯管９と風呂給湯管１０とに供給する温水の温度を調節する温度調節弁であり、出湯管４側と給水バイパス管６側との連通開口面積比を調節することで高温水と水道水との混合比を調節するようにしている。つまり、ここで、使用者が設定した設定温度となるように温度調節している。   Meanwhile, the hot water supply mixing valve 7 and the bath mixing valve 8 are temperature control valves that adjust the temperature of hot water supplied to the hot water supply pipe 9 and the bath hot water supply pipe 10, and communication between the hot water supply pipe 4 side and the water supply bypass pipe 6 side. The mixing ratio of high temperature water and tap water is adjusted by adjusting the opening area ratio. That is, the temperature is adjusted so that the set temperature is set by the user.

尚、給湯用混合弁７と風呂用混合弁８は、制御装置２６に電気的に接続されており、給湯サーミスタ３２や風呂サーミスタ３３によって検出される温度情報に基づいて制御される。また、給湯用混合弁７と風呂用混合弁８は給湯サーミスタ３２や風呂サーミスタ３３によって検出される温度情報に基づいてフィードバック制御を行うように制御される。   The hot water mixing valve 7 and the bath mixing valve 8 are electrically connected to the control device 26 and controlled based on temperature information detected by the hot water thermistor 32 and the bath thermistor 33. The hot water mixing valve 7 and the bath mixing valve 8 are controlled to perform feedback control based on temperature information detected by the hot water thermistor 32 and the bath thermistor 33.

そして、流出口１７には給湯管９が接続される。給湯管９は、台所・洗面所・浴室などに配置された図示しない給湯水栓やシャワー水栓などに通じており、これらの給湯水栓やシャワー水栓が開弁したときに、使用者が設定した設定温度に調節された温水が出湯される。また、流出口１８には風呂給湯管１０が接続され、風呂給湯管１０の途中には風呂電磁弁２５が設けられている。この風呂電磁弁２５は、制御装置２６により制御され、図示しない浴槽に湯張り・差し湯・足し湯などをする場合に開閉される電磁弁である。   A hot water supply pipe 9 is connected to the outlet 17. The hot water supply pipe 9 leads to a hot water faucet or a shower faucet (not shown) arranged in a kitchen, a washroom, a bathroom, etc., and when these hot water faucet or shower faucet is opened, the user can Hot water adjusted to the set temperature is discharged. A bath hot water supply pipe 10 is connected to the outlet 18, and a bath electromagnetic valve 25 is provided in the middle of the bath hot water supply pipe 10. This bath electromagnetic valve 25 is an electromagnetic valve that is controlled by the control device 26 and is opened and closed when hot water, hot water, additional hot water or the like is provided in a bathtub (not shown).

尚、本実施の形態１の混合弁装置５には、出湯管４の途中から分岐させて逃がし弁３４が設けられており、この逃がし弁３４の下流側には図示しないドレインホースが接続され、加熱昇温時に温水が体積膨張して貯湯タンク１内の圧力が所定圧力以上に上昇した場合、貯湯タンク１内の温水を逃がし弁３４から機外へ排出して、貯湯タンク１などにダメージを与えないようになっている。   The mixing valve device 5 according to the first embodiment is provided with a relief valve 34 that is branched from the middle of the hot water discharge pipe 4, and a drain hose (not shown) is connected to the downstream side of the relief valve 34, When the hot water expands during heating and the pressure in the hot water storage tank 1 rises to a predetermined pressure or higher, the hot water in the hot water storage tank 1 is released from the valve 34 and discharged to the outside of the machine, causing damage to the hot water storage tank 1 and the like. Not to give.

尚、本発明の特徴として、図２に示すように、給湯用混合弁７と風呂用混合弁８を１つのバルブボディ１４で所定の経路に接続して各流入出口１５、１６、１７、１８を設けて混合弁装置５を構成している。尚、配管部分は、合成樹脂による一体成形品である。   As a feature of the present invention, as shown in FIG. 2, the mixing valve 7 for hot water supply and the mixing valve 8 for bath are connected to a predetermined path by a single valve body 14, and each inlet / outlet port 15, 16, 17, 18 Is provided to constitute the mixing valve device 5. The pipe portion is an integrally molded product made of synthetic resin.

そして、図３に示すように、混合弁装置５の給湯用混合弁７は風呂用混合弁８よりも所定距離ｈ低い位置となるように配置している。   Then, as shown in FIG. 3, the hot water mixing valve 7 of the mixing valve device 5 is disposed at a position lower than the bath mixing valve 8 by a predetermined distance h.

制御装置２６は、マイクロコンピュータを主体として構成され、内蔵のＲＯＭには、予め設定された制御プログラムが設けられており、給湯サーミスタ３２と風呂サーミスタ３３からの温度情報、および図示しないリモコンに設けられた操作スイッチからの操作信号などに基づいて、ヒートポンプ熱源機２、給湯用混合弁７、風呂用混合弁８、風呂電磁弁２５などを制御するように構成されている。尚、制御装置２６は、熱源制御部と給湯制御部とに分けて構成しても良い。   The control device 26 is mainly composed of a microcomputer, and a built-in ROM is provided with a preset control program, and is provided in temperature information from the hot water supply thermistor 32 and the bath thermistor 33 and a remote controller (not shown). The heat pump heat source device 2, the hot water supply mixing valve 7, the bath mixing valve 8, the bath electromagnetic valve 25, and the like are controlled based on an operation signal from the operation switch. The control device 26 may be divided into a heat source control unit and a hot water supply control unit.

次に、以上の構成による本貯湯式給湯装置の作動概要について説明する。
先ず、図示しない電源スイッチがオンされると（例えば、深夜時間帯に達すると）、制御装置２６によりヒートポンプ熱源機２内のヒートポンプサイクル部品と循環ポンプ１３などのアクチュエータ類を制御させて貯湯タンク１内の給湯用水を加熱して高温（例えば８５℃）の給湯用水が貯えられる。 Next, an outline of the operation of the hot water storage type hot water supply apparatus having the above configuration will be described.
First, when a power switch (not shown) is turned on (for example, when a midnight time zone is reached), the controller 26 controls the heat pump cycle components in the heat pump heat source unit 2 and the actuators such as the circulation pump 13 to control the hot water storage tank 1. The hot water supply water is heated to store hot water supply water at a high temperature (for example, 85 ° C.).

そして、給湯管９から給湯を行った場合、給湯サーミスタ３２が所定の設定温度になるように給湯混合弁７の開度調整を制御装置２６によって制御する。温度調整された湯は、流出口１７から給湯管７を通じて、台所・洗面所・浴室などの蛇口やシャワー水栓に導かれる。   Then, when hot water is supplied from the hot water supply pipe 9, the opening degree adjustment of the hot water supply mixing valve 7 is controlled by the control device 26 so that the hot water supply thermistor 32 has a predetermined set temperature. The hot water whose temperature has been adjusted is led from the outlet 17 through the hot water supply pipe 7 to a faucet or a shower faucet in a kitchen, a washroom, a bathroom, or the like.

また、図示しないリモコンの操作パネルなどから湯張り・差し湯・足し湯などの風呂給湯指示が入力されたときは、制御装置２６から風呂電磁弁２５に開弁指示が伝達され、風呂混合弁８により風呂サーミスタ３３の検出値が所望の風呂給湯温度となるように制御する。温度調整された湯は流出口１８から風呂給湯管１０を通じて、図示しない浴槽に導かれる。   Further, when a bath hot water instruction such as hot water filling, hot water filling or adding hot water is input from an operation panel of a remote controller (not shown), the opening instruction is transmitted from the control device 26 to the bath electromagnetic valve 25, and the bath mixing valve 8 Thus, the detection value of the bath thermistor 33 is controlled to be a desired bath hot water supply temperature. The hot water whose temperature has been adjusted is led from the outlet 18 through the bath hot water supply pipe 10 to a bathtub (not shown).

また、ヒートポンプ熱源機２などの加熱装置によって貯湯タンク１内の給湯用水が加熱されると、水の体積膨張によりタンク缶体内の圧力が増加するため、所定の開放圧力に設定した逃がし弁３４によって圧力開放する。逃がし弁３４にはドレインホースが接続されており、機外に排水されるようになっている。   Further, when the hot water supply water in the hot water storage tank 1 is heated by a heating device such as the heat pump heat source device 2, the pressure in the tank can increases due to the volume expansion of the water, and therefore the relief valve 34 set to a predetermined opening pressure is used. Release pressure. A drain hose is connected to the relief valve 34 so as to be drained outside the machine.

次に、本実施形態での貯湯タンク内の水抜きについて述べる。
図４は本発明における混合弁装置の水抜き時の残水状態を示す説明図である。
先ず、長期にわたり本給湯装置を使用しない場合、配管内の凍結による部品破壊を防止するために、貯湯タンク内の水抜きが行なわれる。貯湯タンク１内の水抜き時は、止水栓21を閉じて給水管３からの給水機能を停止させた状態で、排水栓２０を開いて行なわれる。このとき、給湯管９の先端部にある図示しない給湯栓も開いておく。排水栓２０が開かれると、貯湯タンク１内の湯水は排水管１９から排出される。そして、出湯管４内や混合弁装置５内にある水も貯湯タンク１あるいは給湯側混合弁７を経由し給湯管９を介して抜き取られる。 Next, drainage of the hot water storage tank in this embodiment will be described.
FIG. 4 is an explanatory view showing a remaining water state when draining the mixing valve device according to the present invention.
First, when the hot water supply apparatus is not used for a long period of time, water is drained from the hot water storage tank in order to prevent the destruction of parts due to freezing in the piping. When the water in the hot water storage tank 1 is drained, the drain plug 20 is opened with the stop cock 21 closed and the water supply function from the water supply pipe 3 stopped. At this time, a hot water tap (not shown) at the tip of the hot water supply pipe 9 is also opened. When the drain plug 20 is opened, the hot water in the hot water storage tank 1 is discharged from the drain pipe 19. And the water in the hot-water pipe 4 or the mixing valve device 5 is also extracted through the hot water storage tank 1 or the hot water supply side mixing valve 7 through the hot water supply pipe 9.

すなわち、混合弁装置５の流路内にある水は、図４の点線矢印ａで示すような流れとなる。ここで、本実施の形態での混合弁装置５は、図２、図３に示すように、バルブボディ１４は、垂直方向に向かう1本の直管状の流入側ボディ部１４ａと水平方向に向かう２本の直管状の流出側ボディ部１４ｂ、１４ｃとで構成されている。垂直方向の流入側ボディ部１４ａの内部には、前記給湯用混合弁７と風呂用混合弁８のそれぞれの弁体１５、弁体１６への通水経路を独立した流路に分岐させる仕切り１４ｄが設けられており、その流路断面がおおむね二分されるように構成されている。また、２本の流出側ボデイ部１４ｂ、１４ｃは上下方向に所定距離ｈをずらした状態で水平方向に設けられている。そして、流入側ボディ部１４ａと流出側ボディ部１４ｂ、１４ｃとが合流する部分に位置して前記給湯用混合弁７と風呂用混合弁８の各弁体１５、１６が配置されるように構成され、給湯用混合弁７のほうが風呂用混合弁８よりも上下方向に対して所定距離ｈ低い位置に配置されているため、前記水流入口１６と前記給湯用混合弁７及び風呂用混合弁８との間に設けられた回り込み防止用の湯側逆止弁２４との距離が短くでき、残水部分は図４の太線で示すｂ位置だけとなり、従来よりも残水の量を大幅に少なくできる。   That is, the water in the flow path of the mixing valve device 5 flows as shown by the dotted arrow a in FIG. Here, as shown in FIGS. 2 and 3, in the mixing valve device 5 in the present embodiment, the valve body 14 is directed in the horizontal direction with one straight tubular inflow side body portion 14a directed in the vertical direction. It comprises two straight tubular outflow side body portions 14b and 14c. Inside the vertical inflow side body portion 14a, there is a partition 14d that branches the water flow paths to the valve body 15 and the valve body 16 of the hot water mixing valve 7 and the bath mixing valve 8 into independent flow paths. Is provided, and the cross section of the flow path is roughly divided into two. Further, the two outflow side body portions 14b and 14c are provided in the horizontal direction with a predetermined distance h shifted in the vertical direction. The valve bodies 15 and 16 of the hot water supply mixing valve 7 and the bath mixing valve 8 are arranged at the portion where the inflow side body portion 14a and the outflow side body portions 14b and 14c merge. Since the hot water mixing valve 7 is disposed at a position lower than the bath mixing valve 8 by a predetermined distance h with respect to the vertical direction, the water inlet 16, the hot water mixing valve 7, and the bath mixing valve 8 are arranged. The distance from the hot-water check valve 24 for preventing sneaking in between can be shortened, and the remaining water portion is only at the position b shown by the thick line in FIG. it can.

よって、水抜き時、冬季の凍結による前記給湯用混合弁７や風呂用混合弁８の破壊を確実に防止することができる。   Therefore, it is possible to reliably prevent the hot water supply mixing valve 7 and the bath mixing valve 8 from being destroyed due to freezing in winter when draining water.

本発明の実施の形態１における貯湯式給湯装置の全体構成図である。It is a whole block diagram of the hot water storage type hot water supply apparatus in Embodiment 1 of this invention. 本発明における混合弁装置の概略構成を示す斜視図である。It is a perspective view which shows schematic structure of the mixing valve apparatus in this invention. 本発明における混合弁装置の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the mixing valve apparatus in this invention. 本発明における混合弁装置部分の水抜き時の残水状態を示す説明図である。It is explanatory drawing which shows the residual water state at the time of draining of the mixing valve apparatus part in this invention.

符号の説明Explanation of symbols

１ 貯湯タンク
２ ヒートポンプ熱源機（加熱装置）
３ 給水管
４ 出湯管
５ 混合弁装置
６ 給水バイパス管
７ 給湯用混合弁
８ 風呂用混合弁
９ 給湯管
１０ 風呂用給湯管
１１ 給水サーミスタ
１２ 加熱循環回路
１３ 循環ポンプ
１４ バルブボディ
１４ａ 流入側ボディ部
１４ｂ、１４ｃ 流出側ボディ部
１４ｄ 仕切り
１５ 湯流入口
１６ 水流入口
１７、１８ 流出口
１９ 排水管
２０ 排水栓
２１ 止水栓
２２ フロースイッチ
２３ 湯側逆止弁
２４ 水側逆止弁
２５ 風呂電磁弁
２６ 制御装置
２７ 減圧弁
２８、２９、３０，３１ 貯湯サーミスタ
３２ 給湯サーミスタ
３３ 風呂サーミスタ
３４ 逃がし弁 1 Hot water storage tank 2 Heat pump heat source machine (heating device)
DESCRIPTION OF SYMBOLS 3 Water supply pipe 4 Hot water discharge pipe 5 Mixing valve apparatus 6 Water supply bypass pipe 7 Hot water supply mixing valve 8 Bath mixing valve 9 Hot water supply pipe 10 Bath hot water supply pipe 11 Water supply thermistor 12 Heating circulation circuit 13 Circulation pump 14 Valve body 14a Inflow side body part 14b, 14c Outflow side body 14d Partition 15 Hot water inlet 16 Water inlet 17, 18 Outlet 19 Drain pipe 20 Drain plug 21 Stop cock 22 Flow switch 23 Hot water side check valve 24 Water side check valve 25 Bath solenoid valve 26 control device 27 pressure reducing valve 28, 29, 30, 31 hot water storage thermistor 32 hot water supply thermistor 33 bath thermistor 34 relief valve

Claims (3)

加熱装置によって加熱された給湯用の温水を貯える貯湯タンクと、該貯湯タンクから供給される温水と給水バイパス管から供給される冷水とを混合して給湯管から供給する温水の温度調節を行う給湯用混合弁と、前記貯湯タンクから供給される温水と給水バイパス管から供給される冷水とを混合して風呂給湯管から供給する温水の温度調節を行う風呂用混合弁とを備え、前記給湯用混合弁と風呂用混合弁とを1つのバルブボディに一体的に組み込んでモジュール化し、混合弁装置を構成した貯湯式給湯装置において、
前記混合弁装置の給湯用混合弁を風呂用混合弁よりも低い位置に配置したことを特徴とする貯湯式給湯装置。 A hot water storage tank that stores hot water for hot water supply heated by a heating device, and hot water supplied from the hot water storage tank and cold water supplied from a water supply bypass pipe to adjust the temperature of the hot water supplied from the hot water supply pipe A mixing valve for hot water supplied from the hot water storage tank and cold water supplied from a hot water supply bypass pipe to adjust the temperature of hot water supplied from the hot water hot water pipe. In the hot water storage type hot water supply device that combines the mixing valve and the bath mixing valve into a single valve body and modularizes it,
A hot water storage type hot water supply apparatus characterized in that the mixing valve for hot water supply of the mixing valve apparatus is disposed at a position lower than the mixing valve for bath. 前記混合弁装置は、垂直方向に直管状に形成された１本の流入側ボディ部と、この流入側ボディ部に対し、ほぼ直交するように水平方向に形成された２本の流出側ボディ部を有し、前記給湯用混合弁と風呂用混合弁は前記垂直方向に形成された流入側ボディ部に対して上下方向に所定距離を置いて配置され、給湯用混合弁が風呂用混合弁よりも低い位置に配置されることを特徴とする請求項１に記載の貯湯式給湯装置。   The mixing valve device includes one inflow side body portion formed in a straight tube shape in the vertical direction and two outflow side body portions formed in a horizontal direction so as to be substantially orthogonal to the inflow side body portion. The hot water mixing valve and the bath mixing valve are arranged at a predetermined distance in the vertical direction with respect to the inflow side body portion formed in the vertical direction, and the hot water mixing valve is more than the bath mixing valve. The hot water storage type hot water supply apparatus according to claim 1, wherein the hot water storage type hot water supply apparatus is disposed at a lower position. 前記バルブボディの流入側ボディ部は、内部流路が仕切りによって二分され、二分された流路の一方の流路が給湯用混合弁側に通じ、他方が風呂用混合弁側に通じるものであることを特徴とする請求項２に記載の貯湯式給湯装置。   The inflow side body portion of the valve body has an internal flow path divided into two by a partition, one of the divided flow paths leads to the hot water mixing valve side, and the other leads to the bath mixing valve side. The hot water storage type hot water supply apparatus according to claim 2.
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