JP2007315620A - Water heater - Google Patents

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JP2007315620A
JP2007315620A JP2006142620A JP2006142620A JP2007315620A JP 2007315620 A JP2007315620 A JP 2007315620A JP 2006142620 A JP2006142620 A JP 2006142620A JP 2006142620 A JP2006142620 A JP 2006142620A JP 2007315620 A JP2007315620 A JP 2007315620A
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hot water
storage tank
circulation circuit
water
heat exchanger
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Yasushi Murakoshi
康司 村越
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Sanden Corp
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Sanden Corp
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Priority to JP2006142620A priority Critical patent/JP2007315620A/en
Priority to PCT/JP2007/059307 priority patent/WO2007135843A1/en
Priority to EP07742742A priority patent/EP2020575A1/en
Publication of JP2007315620A publication Critical patent/JP2007315620A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/20—Sewage water

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water heater which utilizes heat energy remaining in hot water used for prescribed purposes such as remaining hot water in a bathtub, for heating water with a simple structure. <P>SOLUTION: As the heat energy of the remaining hot water in the bathtub 30 is recovered by the water flowing out of a lower portion of a hot water storage tank 10 heated by a gas cooler 22, it is unnecessary to recover the heat energy of the remaining hot water in the bathtub 30 by a refrigerant circulating in a refrigerant circuit of a heat pump unit 20, and the heat energy of the remaining hot water in the bathtub 30 is utilized in heating the water with the simple structure of only piping for circulating the water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えばヒートポンプサイクルのガスクーラ等の加熱部において加熱された高温水を貯湯タンクに貯える給湯装置に関するものである。   The present invention relates to a hot water supply apparatus that stores hot water heated in a heating section such as a gas cooler of a heat pump cycle in a hot water storage tank.

従来、この種の給湯装置としては、水を加熱する加熱部として設けられ、ヒートポンプサイクルが構成される冷媒回路と、加熱部によって加熱された高温水を貯える貯湯タンクとを備え、貯湯タンクに貯えられた高温水を例えば台所の流し台や浴室の浴槽等に供給するようにしたものが知られている。   Conventionally, this type of hot water supply apparatus includes a refrigerant circuit that is provided as a heating unit that heats water and that constitutes a heat pump cycle, and a hot water storage tank that stores high-temperature water heated by the heating unit. For example, a high temperature water supplied to a kitchen sink or a bathroom tub is known.

また、例えば入浴後の浴槽の残湯等、所定の用途に利用された温水の熱エネルギーを、貯湯タンクに貯える水を加熱する熱エネルギーとして回収する方法として、冷媒回路を流通する冷媒と浴槽の残湯とを熱交換可能な熱回収用の熱交換器を設け、熱回収用の熱交換器によって浴槽の残湯の熱エネルギーを冷媒に回収させるようにしたものが知られている（例えば、特許文献１参照）。
特開平１１−１１８２４６号公報 In addition, as a method of recovering the thermal energy of hot water used for a predetermined application, such as remaining hot water in a bathtub after bathing, as thermal energy for heating water stored in a hot water storage tank, the refrigerant circulating in the refrigerant circuit and the bathtub A heat recovery heat exchanger capable of exchanging heat with the remaining hot water is provided, and a heat exchanger for recovering heat energy of the remaining hot water in the bathtub is known (for example, Patent Document 1).
JP 11-118246 A

しかしながら、前記給湯装置では、浴槽の残湯の熱エネルギーを回収するために、熱回収用の熱交換器と通常の運転時に大気中の熱エネルギーを冷媒に吸収させる熱交換器がそれぞれ必要となり、冷媒回路の配管も複雑になることから製造コストが高くなるという問題点があった。   However, in the hot water supply device, in order to recover the thermal energy of the remaining hot water in the bathtub, a heat exchanger for heat recovery and a heat exchanger that absorbs the heat energy in the atmosphere during normal operation are required, respectively. Since the piping of the refrigerant circuit is complicated, there is a problem that the manufacturing cost increases.

本発明は前記問題点に鑑みてなされたものであり、その目的とするところは、例えば浴槽の残湯等、所定の用途に利用された温水に残る熱エネルギーを簡単な構造によって水の加熱に利用することのできる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 problems, and the object of the present invention is to heat water remaining in hot water used for a predetermined application, such as remaining hot water in a bathtub, with a simple structure. It is in providing the hot water supply apparatus which can be utilized.

本発明は前記目的を達成するために、水を加熱する加熱部と、加熱部において加熱された高温水を貯える貯湯タンクとを備えた給湯装置において、所定の用途に利用された温水と加熱部において加熱される水とを熱交換することにより、所定の用途に利用された温水に残る熱エネルギーを加熱部において加熱される水に回収させる熱回収手段を備えている。   In order to achieve the above object, the present invention provides a hot water supply apparatus including a heating unit that heats water and a hot water storage tank that stores high-temperature water heated in the heating unit. The heat recovery means is provided for recovering the heat energy remaining in the hot water used for a predetermined application to the water heated in the heating unit by exchanging heat with the water heated in.

これにより、所定の用途に利用された温水に残る熱エネルギーが加熱部において加熱される水に回収されることから、例えばヒートポンプユニットの冷媒回路を流通する冷媒に所定の用途に利用された温水に残る熱エネルギーを回収させる必要はない。   As a result, the heat energy remaining in the hot water used for the predetermined application is recovered in the water heated in the heating unit, so that, for example, the hot water used for the predetermined application is used for the refrigerant flowing through the refrigerant circuit of the heat pump unit. There is no need to recover the remaining thermal energy.

また、本発明は前記目的を達成するために、給湯用の水を貯える貯湯タンクと、水を加熱する加熱部と、貯湯タンク内の下部の水を加熱部に流入させ、加熱部において加熱された水を貯湯タンク内の上部に戻す第１の循環回路と、貯湯タンク内の水と所定の用途に利用される水とを熱交換する熱交換器と、貯湯タンク内の上部の水を熱交換器に流入させ、熱交換器において熱交換した水を貯湯タンク内に戻す第２の循環回路と、所定の用途に利用される水を熱交換器に流通させる第３の循環回路とを備えた給湯装置において、前記貯湯タンク内の下部の水を、第２の循環回路に流入させて第３の循環回路を流通する所定の用途に利用された水と熱交換器において熱交換させ、所定の用途に利用された水と熱交換した第２の循環回路を流通する水を、第１の循環回路に流入させて加熱部において加熱して貯湯タンク内の上部に戻す熱回収手段を備えている。   In order to achieve the above-mentioned object, the present invention allows a hot water storage tank for storing hot water supply water, a heating unit for heating water, and water in the lower part of the hot water storage tank to flow into the heating unit, and is heated in the heating unit. The first circulation circuit for returning the hot water to the upper part of the hot water storage tank, the heat exchanger for exchanging heat between the water in the hot water storage tank and the water used for a predetermined use, A second circulation circuit that flows into the exchanger and returns the heat exchanged in the heat exchanger to the hot water storage tank; and a third circulation circuit that circulates water used for a predetermined application to the heat exchanger. In the hot water supply apparatus, water in the lower part of the hot water storage tank is allowed to flow into the second circulation circuit and heat exchange is performed in a heat exchanger with water used for a predetermined application flowing through the third circulation circuit. Circulates in the second circulation circuit that exchanges heat with water used for The, a heat recovery means for returning to the top of the hot water storage tank is heated in the heating section by entering the first circulation circuit.

これにより、浴槽の残湯の熱エネルギーが熱交換器において貯湯タンクの下部の水によって回収され、浴槽の残湯の熱エネルギーを回収した水が加熱部において加熱されて貯湯タンクの上部に戻されることから、例えばヒートポンプユニットの冷媒回路を流通する冷媒に浴槽の残湯の熱エネルギーを回収させる必要はなく、所定の用途に利用される水を加熱するための熱交換器によって浴槽の残湯の熱エネルギーが回収される。   Thereby, the heat energy of the remaining hot water in the bathtub is recovered by the water in the lower part of the hot water storage tank in the heat exchanger, and the water recovered from the thermal energy of the remaining hot water in the bathtub is heated in the heating unit and returned to the upper part of the hot water storage tank. Therefore, for example, it is not necessary for the refrigerant circulating in the refrigerant circuit of the heat pump unit to recover the thermal energy of the remaining hot water in the bathtub, and the heat exchanger for heating the water used for a predetermined application Thermal energy is recovered.

本発明によれば、例えばヒートポンプユニットの冷媒回路を流通する冷媒に所定の用途に利用された温水に残る熱エネルギーを回収させる必要はなく、水流通用の配管のみの簡単な構造によって例えば浴槽の残湯等、所定の用途に利用された温水に残る熱エネルギーを貯湯タンクに貯えられる水の加熱に利用することが可能となる。   According to the present invention, for example, it is not necessary for the refrigerant flowing through the refrigerant circuit of the heat pump unit to recover the thermal energy remaining in the hot water used for a predetermined application, and the remaining of the bathtub, for example, has a simple structure with only the water distribution pipe. The heat energy remaining in the hot water used for a predetermined application such as hot water can be used to heat the water stored in the hot water storage tank.

図１乃至図４は本発明の一実施形態を示すもので、図１は給湯装置の概略構成図、図２は貯湯運転時の冷媒及び水の流路を示す給湯装置の概略構成図、図３は追焚き運転時の水の流路を示す給湯装置の概略構成図、図４は熱回収貯湯運転時の冷媒及び水の流路を示す給湯装置の概略構成図である。   1 to 4 show an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a hot water supply device, FIG. 2 is a schematic configuration diagram of a hot water supply device showing refrigerant and water flow paths during hot water storage operation, and FIG. 3 is a schematic configuration diagram of a hot water supply device showing a flow path of water during a chasing operation, and FIG. 4 is a schematic configuration diagram of the hot water supply device showing a flow path of refrigerant and water during a heat recovery hot water storage operation.

この給湯装置は、給湯用の水を貯えるための貯湯タンク１０と、貯湯タンク１０に貯えられた水を加熱するためのヒートポンプユニット２０とを備え、貯湯タンク１０に貯えられた高温水を、例えば入浴や洗い物等の給湯用の温水として利用する他、浴槽３０に貯められた湯の追焚きや暖房設備の熱源として利用することが可能なものである。   This hot water supply apparatus includes a hot water storage tank 10 for storing hot water supply water and a heat pump unit 20 for heating the water stored in the hot water storage tank 10, and hot water stored in the hot water storage tank 10 is, for example, In addition to being used as hot water for hot water supply such as bathing and washing, it can be used as a heat source for reheating hot water stored in the bathtub 30 and for heating facilities.

貯湯タンク１０は、ステンレス等の部材からなり、上端及び下端が閉塞された上下方向に延びる円筒状に形成されている。また、貯湯タンク１０は、グラスウールまたは発泡ウレタン等の断熱材によって外部が覆われており、貯湯タンク１０の内部と外部との熱の移動が遮断されるようになっている。   The hot water storage tank 10 is made of a member such as stainless steel and is formed in a cylindrical shape extending in the vertical direction with the upper and lower ends closed. In addition, the outside of the hot water storage tank 10 is covered with a heat insulating material such as glass wool or foamed urethane so that the movement of heat between the inside and the outside of the hot water storage tank 10 is blocked.

ヒートポンプユニット２０は、電動の圧縮機２１、加熱部としてのガスクーラ２２、膨張弁２３及び蒸発器２４を備え、これらを銅またはステンレス等の冷媒配管によって順次接続することにより冷媒回路が構成されている。また、冷媒回路には、高圧側が超臨界状態となる二酸化炭素が冷媒として充填されている。更に、蒸発器２４には、冷媒と熱交換する空気を流通させるための送風機２４ａが設けられている。   The heat pump unit 20 includes an electric compressor 21, a gas cooler 22 as a heating unit, an expansion valve 23, and an evaporator 24, and these are sequentially connected by a refrigerant pipe made of copper or stainless steel to constitute a refrigerant circuit. . In addition, the refrigerant circuit is filled with carbon dioxide that is in a supercritical state on the high-pressure side as a refrigerant. Further, the evaporator 24 is provided with a blower 24a for circulating air that exchanges heat with the refrigerant.

また、貯湯タンク１０には、上水道から貯湯タンク１０に水を供給するための給水配管１１と、給湯用の高温水を浴室や台所などに供給するための給湯配管１２と、貯湯タンク１０の低温水をガスクーラ２２において加熱して貯湯タンク１０に戻すための第１の循環回路１３と、浴槽３０に貯められた温水を貯湯タンク１０の高温水によって追焚きするための第２の循環回路１４が接続されている。   The hot water storage tank 10 includes a water supply pipe 11 for supplying water from the water supply to the hot water storage tank 10, a hot water supply pipe 12 for supplying hot water for hot water supply to a bathroom, a kitchen, and the like, and a low temperature of the hot water storage tank 10. A first circulation circuit 13 for heating water in the gas cooler 22 and returning it to the hot water storage tank 10, and a second circulation circuit 14 for chasing the hot water stored in the bathtub 30 with the hot water in the hot water storage tank 10 It is connected.

給水配管１１は、貯湯タンク１０の下部に接続されており、減圧弁１１ａによって所定の圧力に減圧された水を貯湯タンク１０内に流入させるようになっている。また、給水配管１１は、貯湯タンク１０以外に給湯配管１２に接続されている。   The water supply pipe 11 is connected to the lower part of the hot water storage tank 10 so that water whose pressure has been reduced to a predetermined pressure by the pressure reducing valve 11 a flows into the hot water storage tank 10. The water supply pipe 11 is connected to a hot water supply pipe 12 in addition to the hot water storage tank 10.

給湯配管１２は、貯湯タンク１０の上部に接続され、貯湯タンク１０内に流入する給水の圧力によって上部の高温水が給湯配管１２を流通するようになっている。また、給湯配管１２には、第１の混合弁１２ａを介して給水配管１１が接続され、給湯配管１２を流通する高温水と給水配管１１を流通する水を混合することにより得られた所定温度の温水を浴室や台所等に供給するようになっている。   The hot water supply pipe 12 is connected to the upper part of the hot water storage tank 10, and the high temperature water in the upper part flows through the hot water supply pipe 12 by the pressure of the hot water flowing into the hot water storage tank 10. Further, a water supply pipe 11 is connected to the hot water supply pipe 12 via a first mixing valve 12 a, and a predetermined temperature obtained by mixing high temperature water flowing through the hot water supply pipe 12 and water flowing through the water supply pipe 11. The hot water is supplied to bathrooms and kitchens.

第１の循環配管１３は、貯湯タンク１０の下部、循環ポンプとしての第１の循環ポンプ１３ａ、ガスクーラ２２及び貯湯タンク１０の上部が順次配管によって接続され、第１の循環ポンプ１３ａによって貯湯タンク１０の下部の水がガスクーラ２２を流通して貯湯タンク１０の上部に流入するようになっている。   The first circulation pipe 13 has a lower part of the hot water storage tank 10, a first circulation pump 13 a as a circulation pump, a gas cooler 22, and an upper part of the hot water storage tank 10 connected in order by a pipe, and the hot water storage tank 10 is connected by the first circulation pump 13 a. The water in the lower part of the water flows through the gas cooler 22 and flows into the upper part of the hot water storage tank 10.

第２の循環回路１４は、貯湯タンク１０の上部、熱交換器１４ａ、第２の循環ポンプ１４ｂ、逆止弁１４ｃ及び貯湯タンク１０の上下方向略中央部が順次接続され、第２の循環ポンプ１４ｂによって貯湯タンク１０の上部の高温水が熱交換器１４ａを流通して貯湯タンク１０内の上下方向略中央部に流入するようになっている。熱交換器１４ａは、第２の循環回路１４を流通する水と後述する第３の循環回路１５を流通する浴槽３０内の温水とを熱交換するものである。   The second circulation circuit 14 has an upper part of the hot water storage tank 10, a heat exchanger 14 a, a second circulation pump 14 b, a check valve 14 c, and a substantially central part in the vertical direction of the hot water storage tank 10, which are sequentially connected. The high-temperature water at the upper part of the hot water storage tank 10 flows through the heat exchanger 14 a and flows into the vertical center in the hot water storage tank 10 by 14 b. The heat exchanger 14a exchanges heat between water flowing through the second circulation circuit 14 and hot water in the bathtub 30 flowing through the third circulation circuit 15 described later.

第３の循環回路１５は、浴槽３０、第３の循環ポンプ１５ａ及び熱交換器１４ａが順次接続され、第３の循環ポンプ１５ａによって浴槽３０の温水が熱交換器１４ａを流通して浴槽３０に流入するようになっている。また、第３の循環回路１５には、浴槽３０に湯を供給するための湯張り配管１６の一端側が第１の三方弁１６ａを介して接続されている。   In the third circulation circuit 15, the bathtub 30, the third circulation pump 15 a and the heat exchanger 14 a are sequentially connected, and the hot water in the bathtub 30 flows through the heat exchanger 14 a to the bathtub 30 by the third circulation pump 15 a. Inflow. In addition, one end side of a hot water filled pipe 16 for supplying hot water to the bathtub 30 is connected to the third circulation circuit 15 via a first three-way valve 16a.

湯張り配管１６は、一端側が第１の三方弁１６ａを介して第３の循環回路１５に接続され、他端側が第２の混合弁１６ｂを介して給水配管１１及び給湯配管１２に接続されている。即ち、第１の三方弁１６ａによって第３の循環回路１５と湯張り配管１６とを連通すると、給水配管１１の水と給湯配管１２の高温水は、第１の混合弁１６ｂによって混合されて湯張り配管１６及び第３の循環回路１５を流通し、浴槽３０内に供給される。   One end of the hot water filled pipe 16 is connected to the third circulation circuit 15 via the first three-way valve 16a, and the other end is connected to the water supply pipe 11 and the hot water supply pipe 12 via the second mixing valve 16b. Yes. That is, when the third circulation circuit 15 and the hot water filling pipe 16 are communicated with each other by the first three-way valve 16a, the water in the water supply pipe 11 and the hot water in the hot water supply pipe 12 are mixed by the first mixing valve 16b. It flows through the tension pipe 16 and the third circulation circuit 15 and is supplied into the bathtub 30.

また、第２の循環回路１４には、一端側が貯湯タンク１０の下部に接続された第１の連通管としての配管１７の他端側が貯湯タンク１０の上部と熱交換器１４ａの流入側との間の流路に第１の流路切替弁としての第２の三方弁１７ａを介して接続されている。即ち、熱交換器１４ａには、貯湯タンク１０の上部の高温水または下部の低温水が第２の三方弁１７ａの切換えによって流入するようになっている。更に、第２の循環回路１４には、一端側が第１の循環回路１３の貯湯タンク１０の下部と第１の循環ポンプ１３ａとの間の流路に第２の流路切替弁としての第３の三方弁１８ａを介して接続された第２の連通管としての配管１８の他端側が熱交換器１４ａの流出側と第２の循環ポンプ１４ｂの吸入側との間の流路に接続されている。即ち、第２の循環回路１４の熱交換器１４ａの流出側の流路は、第３の三方弁１８ａの切換えによって配管１８を介して第１の循環回路１３の第１の循環ポンプ１３ａの吸入側と連通し、第２の循環ポンプ１４ｂを停止して第１の循環ポンプ１３ａを運転すると、第２の循環回路１４の熱交換器１４ａから流出する水は第１の循環ポンプ１３ａに吸引されて第１の循環回路１３に流入する。   Further, the second circulation circuit 14 has one end side connected to the lower part of the hot water storage tank 10 and the other end side of the pipe 17 as a first communication pipe between the upper part of the hot water storage tank 10 and the inflow side of the heat exchanger 14a. An intermediate flow path is connected via a second three-way valve 17a as a first flow path switching valve. That is, high temperature water at the top of the hot water storage tank 10 or low temperature water at the bottom of the hot water storage tank 10 flows into the heat exchanger 14a by switching the second three-way valve 17a. Further, the second circulation circuit 14 has a third end serving as a second flow path switching valve on one end side of the flow path between the lower portion of the hot water storage tank 10 of the first circulation circuit 13 and the first circulation pump 13a. The other end of the pipe 18 as the second communication pipe connected via the three-way valve 18a is connected to a flow path between the outflow side of the heat exchanger 14a and the suction side of the second circulation pump 14b. Yes. That is, the flow path on the outflow side of the heat exchanger 14a of the second circulation circuit 14 is sucked by the first circulation pump 13a of the first circulation circuit 13 through the pipe 18 by switching the third three-way valve 18a. When the second circulation pump 14b is stopped and the first circulation pump 13a is operated, the water flowing out from the heat exchanger 14a of the second circulation circuit 14 is sucked into the first circulation pump 13a. Into the first circulation circuit 13.

以上のように構成された給湯装置において、通常の貯湯運転を行う場合には、第１の循環ポンプ１３ａ及び圧縮機２１を運転する。このとき、第３の三方弁１８ａは、貯湯タンク１０の下部と第１の循環ポンプ１３ａの吸入側を連通する流路に設定する。これにより、図２に示すように、圧縮機２１から吐出された冷媒は、ガスクーラ２２を流通した後に膨張弁２３を介して蒸発器２４に流入し、蒸発器２４から流出した冷媒は、圧縮機２１に吸入される。また、貯湯タンク１０の下部の水は、第１の循環ポンプ１３ａによって第１の循環回路１３を流通し、ガスクーラ２２において熱交換することにより加熱され、貯湯タンク１０の上部に貯えられる。貯湯タンク１０内の高温水が所定量になると、第１の循環ポンプ１４ａ及び圧縮機２１を停止する。   In the hot water supply apparatus configured as described above, when the normal hot water storage operation is performed, the first circulation pump 13a and the compressor 21 are operated. At this time, the third three-way valve 18a is set to a flow path that connects the lower part of the hot water storage tank 10 and the suction side of the first circulation pump 13a. As a result, as shown in FIG. 2, the refrigerant discharged from the compressor 21 flows into the evaporator 24 through the expansion valve 23 after flowing through the gas cooler 22, and the refrigerant flowing out of the evaporator 24 flows into the compressor. 21 is inhaled. The water in the lower part of the hot water storage tank 10 is heated by exchanging heat in the gas cooler 22 through the first circulation circuit 13 by the first circulation pump 13 a and stored in the upper part of the hot water storage tank 10. When the hot water in the hot water storage tank 10 reaches a predetermined amount, the first circulation pump 14a and the compressor 21 are stopped.

貯湯タンク１０の上部の高温水は、給湯配管１２を流通し、第１の混合弁１２ａによって給水配管１１を流通する水と混合され、浴室のシャワーや台所の水栓から所定温度の温水として供給される。また、貯湯タンク１０の上部の高温水は、第１の三方弁１６ａによって湯張り配管１６と第３の循環回路１５を連通することにより、第２の混合弁１６ｂによって給水配管１１を流通する水と混合され、第３の循環回路１５を介して浴槽３０に所定温度の温水として供給される。貯湯タンク１０の高温水が消費されると、貯湯タンク１０内には、給水配管１１の水が流入するため、貯湯タンク１０内は常に満水状態が保持される。   The hot water in the upper part of the hot water storage tank 10 flows through the hot water supply pipe 12, is mixed with the water flowing through the water supply pipe 11 by the first mixing valve 12a, and is supplied as hot water of a predetermined temperature from a bathroom shower or kitchen faucet. Is done. Further, the hot water in the upper part of the hot water storage tank 10 is circulated through the water supply pipe 11 by the second mixing valve 16b by connecting the hot water filling pipe 16 and the third circulation circuit 15 by the first three-way valve 16a. And is supplied as hot water of a predetermined temperature to the bathtub 30 via the third circulation circuit 15. When the hot water in the hot water storage tank 10 is consumed, the water in the water supply pipe 11 flows into the hot water storage tank 10, so that the hot water storage tank 10 is always kept full.

また、浴槽３０内の温水を加熱する追焚き運転を行う場合には、第２の循環ポンプ１４ｂ及び第３の循環ポンプ１５ａを運転する。このとき、第１の三方弁１６ａは、熱交換器１４ａと浴槽３０を連通する流路に設定する。また、第２の三方弁１７ａは、貯湯タンク１０の上部と熱交換器１４ａの流入側を連通する流路に設定する。更に、第３の三方弁１８ａは、貯湯タンク１０の下部と第１の循環ポンプ１３ａの吸入側を連通する流路に設定する。これにより、図３に示すように、熱交換器１４ａにおいて第２の循環回路１４を流通する高温水と第３の循環回路１５を流通する浴槽３０内の温水とが熱交換し、浴槽３０内の温水が加熱される。第２の循環回路１４を流通する高温水は、熱交換器１４ａにおいて熱交換することにより冷却され、貯湯タンク１０内の上下方向略中央部に戻される。   Moreover, when performing the reheating operation which heats the hot water in the bathtub 30, the 2nd circulation pump 14b and the 3rd circulation pump 15a are operated. At this time, the first three-way valve 16a is set to a flow path that connects the heat exchanger 14a and the bathtub 30. The second three-way valve 17a is set as a flow path that connects the upper part of the hot water storage tank 10 and the inflow side of the heat exchanger 14a. Further, the third three-way valve 18a is set as a flow path that connects the lower part of the hot water storage tank 10 and the suction side of the first circulation pump 13a. Thereby, as shown in FIG. 3, in the heat exchanger 14 a, the hot water flowing through the second circulation circuit 14 and the hot water in the bathtub 30 flowing through the third circulation circuit 15 exchange heat, and the inside of the bathtub 30 Of hot water is heated. The high-temperature water flowing through the second circulation circuit 14 is cooled by exchanging heat in the heat exchanger 14 a and returned to the substantially central portion in the vertical direction in the hot water storage tank 10.

また、浴槽３０内の残湯の熱エネルギーを回収しながら貯湯タンク１０内に高温水を貯える熱回収貯湯運転を行う場合には、第２の循環ポンプ１４ｂを停止して第１の循環ポンプ１３ａ及び第３の循環ポンプ１５ａを運転する。このとき、第１の三方弁１６ａは、熱交換器１４ａと浴槽３０を連通する流路に設定する。また、第２の三方弁１７ａは、配管１７と熱交換器１４ａの流入側を連通する流路に設定する。更に、第３の三方弁１８ａは、配管１８と第１の循環ポンプ１３ａの吸入側を連通する流路に設定する。これにより、図４に示すように、貯湯タンク１０の下部の水は、第１の循環ポンプ１３ａによって配管１７を流通して熱交換器１４ａに流入し、熱交換器１４ａにおいて第３の循環回路１５を流通する浴槽３０の残湯と熱交換することにより加熱される。浴槽３０の残湯と熱交換して加熱された水は、配管１８を流通してガスクーラ２２において加熱され、貯湯タンク１０の上部に貯えられる。   In addition, when performing a heat recovery hot water storage operation in which high temperature water is stored in the hot water storage tank 10 while recovering the thermal energy of the remaining hot water in the bathtub 30, the second circulation pump 14b is stopped and the first circulation pump 13a. And the third circulating pump 15a is operated. At this time, the first three-way valve 16a is set to a flow path that connects the heat exchanger 14a and the bathtub 30. The second three-way valve 17a is set as a flow path that connects the pipe 17 and the inflow side of the heat exchanger 14a. Further, the third three-way valve 18a is set to a flow path that connects the pipe 18 and the suction side of the first circulation pump 13a. As a result, as shown in FIG. 4, the water in the lower part of the hot water storage tank 10 flows through the pipe 17 by the first circulation pump 13a and flows into the heat exchanger 14a. In the heat exchanger 14a, the third circulation circuit 15 is heated by exchanging heat with the remaining hot water of the bathtub 30 that circulates through the water. The water heated by exchanging heat with the remaining hot water in the bathtub 30 flows through the pipe 18 and is heated in the gas cooler 22 and stored in the upper part of the hot water storage tank 10.

このように、本実施形態の給湯装置によれば、ガスクーラ２２によって加熱される貯湯タンク１０の下部から流出する水に浴槽３０内の残湯の熱エネルギーを回収させるようにしたので、ヒートポンプユニット２０の冷媒回路を流通する冷媒に浴槽３０内の残湯の熱エネルギーを回収させる必要はなく、水流通用の配管のみの簡単な構造によって浴槽３０の残湯の熱エネルギーを水の加熱に利用することが可能となる。   As described above, according to the hot water supply apparatus of the present embodiment, the heat energy of the remaining hot water in the bathtub 30 is recovered by the water flowing out from the lower part of the hot water storage tank 10 heated by the gas cooler 22. It is not necessary for the refrigerant circulating in the refrigerant circuit to recover the thermal energy of the remaining hot water in the bathtub 30, and the thermal energy of the remaining hot water in the bathtub 30 is used for heating the water by a simple structure with only water distribution piping. Is possible.

また、貯湯タンク１０内の下部の水を、第２の循環回路１４に流入させて第３の循環回路を流通する浴槽３０内の残湯と熱交換器１４ａにおいて熱交換させ、浴槽３０内の残湯と熱交換した第２の循環回路１４を流通する水を、第１の循環回路１３に流入させてガスクーラ２２において加熱して貯湯タンク１０内の上部に戻すようにしたので、別途熱回収用の熱交換器を必要とすることなく追焚き用の熱交換器１４ａによって浴槽３０内の残湯の熱エネルギーを回収することができ、部品点数を低減することにより製造コストの低減を図ることが可能となる。   Further, the water in the lower part of the hot water storage tank 10 flows into the second circulation circuit 14 to exchange heat with the remaining hot water in the bathtub 30 flowing through the third circulation circuit in the heat exchanger 14a. The water flowing through the second circulation circuit 14 that exchanges heat with the remaining hot water flows into the first circulation circuit 13 and is heated in the gas cooler 22 so as to be returned to the upper part of the hot water storage tank 10, so that heat recovery is performed separately. The heat energy of the remaining hot water in the bathtub 30 can be recovered by the reheating heat exchanger 14a without the need for a heat exchanger, and the manufacturing cost can be reduced by reducing the number of parts. Is possible.

また、貯湯タンク１０内の下部を第２の循環回路１４の熱交換器１４ａの流入側に流通させる配管１７と、第２の循環回路１４の熱交換器１４ａの流入側の流路を第２の循環回路１４側または配管１７側に切換える第２の三方弁１７ａと、第２の循環回路１４の熱交換器１４ａの流出側を第１の循環回路１３のガスクーラ２２の流入側に連通させる配管１８と、第２の循環回路１４の熱交換器１４ａの流出側の流路を第２の循環回路１４側または配管１８側に切換える第３の三方弁１８ａと、第１の循環ポンプ１３ａとから浴槽３０内の残湯の熱エネルギーを回収するようにしたので、簡単な構成によって残湯の熱エネルギーの回収を行うことができ、製造コストの低減を図ることが可能となる。   In addition, a pipe 17 that circulates the lower part of the hot water storage tank 10 to the inflow side of the heat exchanger 14a of the second circulation circuit 14 and a flow path on the inflow side of the heat exchanger 14a of the second circulation circuit 14 are secondly connected. The second three-way valve 17a that switches to the circulation circuit 14 side or the piping 17 side, and the piping that connects the outflow side of the heat exchanger 14a of the second circulation circuit 14 to the inflow side of the gas cooler 22 of the first circulation circuit 13 18, a third three-way valve 18 a that switches the flow path on the outflow side of the heat exchanger 14 a of the second circulation circuit 14 to the second circulation circuit 14 side or the pipe 18 side, and the first circulation pump 13 a. Since the heat energy of the remaining hot water in the bathtub 30 is recovered, the heat energy of the remaining hot water can be recovered with a simple configuration, and the manufacturing cost can be reduced.

尚、前記実施形態では、ガスクーラ２２によって加熱される貯湯タンク１０の下部から流出する水に浴槽３０の残湯の熱エネルギーを回収させるようにしたものを示したが、例えば、ガスクーラ２２によって加熱される貯湯タンク１０の下部から流出する水に床暖房や空気調和機等の熱源となる温水の熱エネルギーを回収させるようにしてもよい。   In the above embodiment, the water flowing out from the lower part of the hot water storage tank 10 heated by the gas cooler 22 is recovered to recover the thermal energy of the remaining hot water in the bathtub 30, but for example, heated by the gas cooler 22. You may make it collect | recover the thermal energy of the hot water used as heat sources, such as floor heating and an air conditioner, in the water which flows out from the lower part of the hot water storage tank 10 to be.

本発明の一実施形態を示す給湯装置の概略構成図The schematic block diagram of the hot-water supply apparatus which shows one Embodiment of this invention 貯湯運転時の冷媒及び水の流路を示す給湯装置の概略構成図Schematic configuration diagram of hot water supply device showing refrigerant and water flow paths during hot water storage operation 追焚き運転時の水の流路を示す給湯装置の概略構成図Schematic configuration diagram of a hot water supply device showing the flow path of water during the chasing operation 熱回収貯湯運転時の冷媒及び水の流路を示す給湯装置の概略構成図Schematic configuration diagram of hot water supply device showing refrigerant and water flow paths during heat recovery hot water storage operation

符号の説明Explanation of symbols

１０…貯湯タンク、１３…第１の循環回路、１４…第２の循環回路、１４ａ…熱交換器、１５…第３の循環回路、１７…配管、１７ａ…第２の三方弁、１８…配管、１８ａ…第３の三方弁、２０…ヒートポンプユニット、２２…ガスクーラ、３０…浴槽。   DESCRIPTION OF SYMBOLS 10 ... Hot water storage tank, 13 ... 1st circulation circuit, 14 ... 2nd circulation circuit, 14a ... Heat exchanger, 15 ... 3rd circulation circuit, 17 ... Piping, 17a ... 2nd three-way valve, 18 ... Piping , 18a ... third three-way valve, 20 ... heat pump unit, 22 ... gas cooler, 30 ... bathtub.

Claims (5)

水を加熱する加熱部と、加熱部において加熱された高温水を貯える貯湯タンクとを備えた給湯装置において、
所定の用途に利用された温水と加熱部において加熱される水とを熱交換することにより、所定の用途に利用された温水に残る熱エネルギーを加熱部において加熱される水に回収させる熱回収手段を備えた
ことを特徴とする給湯装置。 In a hot water supply apparatus comprising a heating unit for heating water and a hot water storage tank for storing high-temperature water heated in the heating unit,
Heat recovery means for recovering the heat energy remaining in the hot water used in the predetermined application to the water heated in the heating part by exchanging heat between the hot water used in the predetermined application and the water heated in the heating unit A hot water supply apparatus characterized by comprising: 給湯用の水を貯える貯湯タンクと、水を加熱する加熱部と、貯湯タンク内の下部の水を加熱部に流入させ、加熱部において加熱された水を貯湯タンク内の上部に戻す第１の循環回路と、貯湯タンク内の水と所定の用途に利用される水とを熱交換する熱交換器と、貯湯タンク内の上部の水を熱交換器に流入させ、熱交換器において熱交換した水を貯湯タンク内に戻す第２の循環回路と、所定の用途に利用される水を熱交換器に流通させる第３の循環回路とを備えた給湯装置において、
前記貯湯タンク内の下部の水を、第２の循環回路に流入させて第３の循環回路を流通する所定の用途に利用された水と熱交換器において熱交換させ、所定の用途に利用された水と熱交換した第２の循環回路を流通する水を、第１の循環回路に流入させて加熱部において加熱して貯湯タンク内の上部に戻す熱回収手段を備えた
ことを特徴とする給湯装置。 A hot water storage tank that stores water for hot water supply, a heating unit that heats water, and water in the lower part of the hot water storage tank is allowed to flow into the heating part, and the water heated in the heating part is returned to the upper part of the hot water storage tank. A heat exchanger that exchanges heat between the circulation circuit, the water in the hot water storage tank and the water that is used for a predetermined purpose, and the water in the upper part of the hot water storage tank flow into the heat exchanger and exchange heat in the heat exchanger. In a hot water supply apparatus comprising: a second circulation circuit that returns water into the hot water storage tank; and a third circulation circuit that circulates water used for a predetermined application to the heat exchanger.
The water in the lower part of the hot water storage tank flows into the second circulation circuit and is exchanged in the heat exchanger with the water used for the predetermined use flowing through the third circulation circuit, and is used for the predetermined use. Heat recovery means for supplying water flowing through the second circulation circuit exchanged with the water into the first circulation circuit, heating it in the heating section, and returning it to the upper part of the hot water storage tank. Hot water supply device. 前記熱回収手段を、貯湯タンク内の下部を第２の循環回路の熱交換器の流入側に連通させる第１の連通管と、第２の循環回路の熱交換器の流入側の流路を第２の循環回路側または第１の連通管側に切換える第１の流路切替弁と、第２の循環回路の熱交換器の流出側を第１の循環回路の加熱器の流入側に連通させる第２の連通管と、第２の循環回路の熱交換器の流出側の流路を第２の循環回路側または第２の連通管側に切換える第２の流路切替弁と、第１の循環回路に接続された循環ポンプとから構成した
ことを特徴とする請求項２記載の給湯装置。 The heat recovery means includes a first communication pipe that communicates the lower part of the hot water storage tank with the inflow side of the heat exchanger of the second circulation circuit, and a flow path on the inflow side of the heat exchanger of the second circulation circuit. The first flow path switching valve that switches to the second circulation circuit side or the first communication pipe side and the outflow side of the heat exchanger of the second circulation circuit communicate with the inflow side of the heater of the first circulation circuit A second communication pipe, a second flow path switching valve for switching the flow path on the outflow side of the heat exchanger of the second circulation circuit to the second circulation circuit side or the second communication pipe side, The hot water supply device according to claim 2, comprising a circulation pump connected to the circulation circuit. 前記所定の用途に利用された水として、浴槽に貯められた残湯を用いた
ことを特徴とする請求項１、２または３記載の給湯装置。 The hot water supply apparatus according to claim 1, 2, or 3, wherein the remaining hot water stored in the bathtub is used as the water used for the predetermined application. 前記所定の用途に利用された水として、床暖房や空気調和機の暖房運転に利用した温水を用いた
ことを特徴とする請求項１、２または３記載の給湯装置。 The hot water supply apparatus according to claim 1, 2 or 3, wherein hot water used for floor heating or heating operation of an air conditioner is used as the water used for the predetermined application.
JP2006142620A 2006-05-23 2006-05-23 Water heater Pending JP2007315620A (en)

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EP07742742A EP2020575A1 (en) 2006-05-23 2007-05-01 Hot water supply device

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JP2009198119A (en) * 2008-02-22 2009-09-03 Denso Corp Hot water supply device
JP2009198115A (en) * 2008-02-22 2009-09-03 Mitsubishi Electric Corp Hot water storage type hot water supply system and control method of hot water storage type hot water supply system
JP2009216266A (en) * 2008-03-07 2009-09-24 Toshiba Carrier Corp Heat pump water heater
JP2010121843A (en) * 2008-11-19 2010-06-03 Panasonic Corp Heat pump water heater
JP2010196992A (en) * 2009-02-26 2010-09-09 Chofu Seisakusho Co Ltd Water heater
JP2010276220A (en) * 2009-05-26 2010-12-09 Chofu Seisakusho Co Ltd Hot water supply system
JP2013245919A (en) * 2012-05-29 2013-12-09 Mitsubishi Electric Corp Storage type water heater
US20150330662A1 (en) * 2012-12-13 2015-11-19 Robert Bosch Gmbh Heating device and method for operating the same
JP2017142026A (en) * 2016-02-10 2017-08-17 野村マイクロ・サイエンス株式会社 Method and system for manufacturing heated water
KR20220111130A (en) * 2021-02-01 2022-08-09 대림로얄이앤피(주) Complex waste heat recovery device
KR102483427B1 (en) * 2021-02-01 2023-01-02 대림로얄이앤피(주) Complex waste heat recovery device

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