JP2004093041A - Hot water storage-type water heater - Google Patents

Hot water storage-type water heater Download PDF

Info

Publication number
JP2004093041A
JP2004093041A JP2002256273A JP2002256273A JP2004093041A JP 2004093041 A JP2004093041 A JP 2004093041A JP 2002256273 A JP2002256273 A JP 2002256273A JP 2002256273 A JP2002256273 A JP 2002256273A JP 2004093041 A JP2004093041 A JP 2004093041A
Authority
JP
Japan
Prior art keywords
hot water
water storage
pipe
storage tank
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002256273A
Other languages
Japanese (ja)
Inventor
Mitsuru Nagakura
永倉 満
Michio Nakagawa
中川 道夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corona Corp
Original Assignee
Corona Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Corona Corp filed Critical Corona Corp
Priority to JP2002256273A priority Critical patent/JP2004093041A/en
Publication of JP2004093041A publication Critical patent/JP2004093041A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage-type water heater for simplifying the connection and maintenance of pipes, and being arbitrarily installed without constraint. <P>SOLUTION: This hot water storage-type water heater comprises a hot water storage tank unit 1 connected to an inlet pipe 7 and an outlet pipe 5 and storing the water, and a heating means 2 for heating the water in the hot water storage tank unit 1. A pipe connecting the hot water storage tank unit 1 and the heating means 2, and a pipe unit 3 accommodating a hot water supplying pipe, functional parts and a hot water supply control part, are mounted between the hot water storage tank unit 1 and the heating means 2. The pipe connection in installation and the maintenance are easily performed in the pipe unit separated from the hot water supply tank unit, which is very effective, in particular, when the hot water storage-type water heater is installed under the floor of a house, and realizes the free installation. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
この発明は、ヒートポンプ給湯機等で貯湯部分と加熱部分が離れている貯湯式給湯装置に関するものである。
【0002】
【従来の技術】
従来のこの種のヒ−トポンプ給湯機では、貯湯タンクユニット内に給湯用や風呂用の配管及び機能部品を集中させて収納配置することで、配管の接続作業やメンテナンスの容易化を図るものであった。(例えば、特許文献1参照。)
【0003】
【特許文献1】
特開2002−48404号公報
【0004】
【発明が解決しようとする課題】
ところでこの従来のものでは、器具正面の蓋を開けることで、配管室及び配管接続室が露呈して、配管の接続作業や配管、機能部品のメンテナンス作業が容易に行われるものであるが、設置条件によってはこの器具正面の蓋を開けられないことがあり、この場合には器具の設置そのものが出来ないものであった。
【0005】
この発明はこの点に着目し上記欠点を解決する為、特にその構成を、入水管と出湯管が接続され湯水を貯湯する貯湯タンクユニットと、前記貯湯タンクユニット内の湯水を加熱する加熱手段とを備え、前記貯湯タンクユニットと加熱手段との間には、該貯湯タンクユニットと加熱手段とを結ぶ配管及び、給湯用の配管や機能部品及び給湯制御部を収納した配管ユニットを備えたものである。
【0006】
これによって、設置時の配管接続やメンテナンスは貯湯タンクユニットから離れた配管ユニットで容易に行われるものであり、又貯湯タンクユニットをどのような場所にどのように設置したとしても、配管ユニットの設置位置は自由に選択出来、配管接続とメンテナンスは確実に行われるもので、特に貯湯タンクユニットを建家の床下に設置する場合には極めて有効であり、設置フリ−を実現出来るものである。
【0007】
【発明の実施の形態】
次に、本発明の一実施形態を図面に基づいて説明する。
1は横置き式で建家の床下に設置される貯湯タンクユニット、2はヒートポンプユニットよりなる加熱手段、3は前記貯湯タンクユニット1と加熱手段2とを結ぶ配管ユニットである。
【0008】
前記貯湯タンクユニット1は、湯水を貯湯する横長形状の貯湯タンク4と、貯湯タンク4の上面に接続された出湯管5及び加熱手段2からの戻り管6と、貯湯タンク4の下部に接続された入水管7、加熱手段2へ向かう往き管8とがそれぞれ接続しており、又貯湯タンク4内方には入水管7と連通し給水を行う円筒状の給水補助管9が長手方向に延設して備えられ、終端部は閉塞されている。
【0009】
更に前記給水補助管9は、側壁左右から外方に広がった邪魔板10を備えると共に、該邪魔板10より下方の給水補助管9には斜め下方に向かって給水を放出する一対の給水孔11を、長手方向に向かって複数設けている。
又貯湯タンク4内壁の上下方向のほぼ中間部分全周には、内方に張り出して貯湯タンク4の内壁に沿って下方から上昇して来る水流を阻止するド−ナツ形状の遮断板12が備えられている。
【0010】
前記加熱手段2は、冷媒を圧縮するコンプレッサー13と、凝縮器としての冷媒−水熱交換器14と、減圧器15と、蒸発器としての空気熱交換器16よりなるヒートポンプ回路17と、空気熱交換器16に送風する送風機18と、前記戻り管6と往き管8から成る循環回路19途中に設けられた能力可変の循環ポンプ20と、循環回路19の冷媒−水熱交換器14入口側に設けられ、冷媒−水熱交換器14に流入する湯水の温度を検出する熱交入口温度センサ21と、循環回路19の冷媒−水熱交換器14出口側に設けられ、冷媒−水熱交換器14から流出する湯水の温度を検出する熱交出口温度センサ22と、この加熱手段2の制御を行う加熱制御部23とを備えて構成されている。
【0011】
前記配管ユニット3は、出湯管5からの高温水と入水管7から分岐された分岐管24からの低温水とを混合するミキシング弁25と、ミキシング弁25の下流に接続された給湯栓26を有する給湯管27と、給湯管27に設けられた給湯温度センサ28と、給湯管27に設けられた給湯流量センサ29と、給湯管27から分岐し浴槽30の循環回路31に接続した湯張り管32と、循環回路31中で浴槽水の保温を行う保温ヒ−タ33及び風呂循環ポンプ34と、入水管7の減圧弁35及び出湯管5の圧力逃がし弁36と、これらの機能部品を制御する給湯制御部37とを備えて構成されており、配管及び機能部品をこの配管ユニット3に集中させることで、設置時の配管作業及び設置後のメンテナンス作業を簡単且つ効率よく行えるようにしているもので、特に貯湯タンクユニット1を建家の床下に設置するものでは特に有効である。
【0012】
次にこの発明一実施例の作動について説明する。
まず貯湯タンク4内の湯水を加熱する場合には、加熱制御部23がヒートポンプ回路17を作動させ、循環回路19の循環ポンプ20を駆動開始する。そして、循環ポンプ20の駆動により貯湯タンク4下部から取り出された湯水が加熱手段2の冷媒−水熱交換器14に流入して加熱され、循環回路19を介して貯湯タンク4の上部に戻されることにより高温の湯が貯湯される。
【0013】
ここで、熱交入口温度センサ21と熱交出口温度センサ22の検出値に応じて、ヒートポンプ回路17の出力と循環ポンプ20の能力を適宜調整して加熱する湯水が所定の高温になるように可変されるものである。詳細には、それぞれの出力および能力は熱交入口温度センサ21と熱交出口温度センサ22の検出値に応じてフィードフォワード制御及び/又はフィードバック制御により調整されるものである。
【0014】
そして、貯湯タンク4の側面に設けられた貯湯温度センサ(図示せず)が所定の量の高温水が貯湯されたことを検出するか、又は、熱交入口温度センサ21が所定温度以上を検出すると、給湯制御部37が加熱制御部23へ加熱動作の停止を指令し、ヒートポンプ回路17と循環ポンプ20の作動が停止されるものである。
【0015】
一方この貯湯タンク4に貯湯された高温水は、給湯栓26を開くと、入水管7からの圧により貯湯タンク4上部の高温水が出湯管5に押し出され、給湯制御部37により制御されるミキシング弁25にて分岐管24の低温水と給湯温度センサ28の検出する温度が所定の温度になるように混合されて給湯管27を介して給湯されるものであり、湯張り管32を介して所定温度湯を浴槽30へ湯張りすることも出来る。なお、前記所定の温度は操作用リモコン(図示せず)により任意に設定されるものである。
【0016】
又この時、給湯使用で減った分の給水が給水圧で貯湯タンク4内に流入して来るが、この給水は給水補助管9の給水孔11から分散し、しかも下方に向かって放出され、更に放出後給水補助管9の外周を直ぐ上昇しようとする水流は、邪魔板10によつて邪魔され外方へ広げられるので、勢いも弱まると共に大きな水流又は水の固まりとなって上昇することが阻止され、温水と水との境界面が破壊されるのを防止し、高温水を高温水のまま最後まで良好に給湯することが出来るものである。
【0017】
更に温水層が貯湯タンク4中央より上部に達した時には、給水補助管9により下方に放出された給水が、貯湯タンク4内壁に沿って勢い良く上昇して境界面が破壊される危険があるが、この発明では貯湯タンク4のほぼ中央部分には遮断板12が備えられているので、内壁に沿って上昇して来た水流は遮断板12によって、その勢いを抑えられると共に中央側に案内され、緩やかに温水層の下に流入して、境界面を壊すことなく温水を最後まで給湯出来るものである。
【0018】
一方貯湯タンクユニット1と配管ユニット3との接続は、出湯管5及び入水管7及び加熱手段2との循環回路19を配管ユニット3側で接続すれば良く、又加熱手段2とは同じく循環回路19を配管ユニット3側で接続することで、貯湯タンクユニット1が例えば建家の床下等に設置され狭くて配管接続及びメンテナンスが出来ない場合でも、配管ユニット3を広い場所に設置することで、該配管ユニット3側で容易に配管接続及びメンテナンスが行われるものであり、更に配管ユニット3には予め給湯配管や風呂配管及びこれらの機能部品が取り付けられているので、設置作業も配管接続のみで済み極めて簡単に行われるものである。
【0019】
更にこの実施例では、ヒ−トポンプ式の給湯機で説明したが、これに限定されることなく、電気ヒ−タを加熱手段とした電気温水器でも同様な効果が得られるものである。
【0020】
【発明の効果】
以上のようにこの発明によれば、設置時の配管接続やメンテナンスは貯湯タンクユニットから離れた配管ユニットで容易に行われるものであり、又貯湯タンクユニットをどのような場所にどのように設置したとしても、配管ユニットの設置位置は自由に選択出来、配管接続とメンテナンスは確実に行われるもので、特に貯湯タンクユニットを建家の床下に設置する場合には極めて有効であり、設置フリ−を実現出来るものである。
【図面の簡単な説明】
【図1】この発明の一実施例を付した貯湯式給湯装置の概略構成図。
【図2】同貯湯タンクの断面図。
【符号の説明】
1 貯湯タンクユニット
2 加熱手段
3 配管ユニット
5 出湯管
7 入水管
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hot water supply type hot water supply device in which a hot water storage portion and a heating portion are separated by a heat pump water heater or the like.
[0002]
[Prior art]
In a conventional heat pump water heater of this type, piping and functional parts for hot water supply and bath are concentrated and stored in a hot water storage tank unit to facilitate connection work and maintenance of the piping. there were. (For example, refer to Patent Document 1.)
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-48404
[Problems to be solved by the invention]
By the way, in this conventional apparatus, the pipe chamber and the pipe connection chamber are exposed by opening the lid on the front of the instrument, and the pipe connection work, the pipe work, and the maintenance work of the functional parts are easily performed. Depending on the conditions, the lid on the front of the appliance could not be opened, and in this case, the appliance itself could not be installed.
[0005]
The present invention pays attention to this point, and in order to solve the above-mentioned drawbacks, in particular, the configuration thereof includes a hot water storage tank unit connected to a water inlet pipe and a hot water pipe and storing hot water, and a heating means for heating hot water in the hot water storage tank unit. And a piping unit between the hot water storage tank unit and the heating means, a piping connecting the hot water storage tank unit and the heating means, and a piping unit for storing hot water supply pipes, functional parts, and a hot water supply control unit. is there.
[0006]
As a result, piping connection and maintenance at the time of installation can be easily performed in the piping unit remote from the hot water storage tank unit, and no matter how and where the hot water storage tank unit is installed, installation of the piping unit The position can be freely selected, and piping connection and maintenance can be performed reliably. This is extremely effective particularly when the hot water storage tank unit is installed under the floor of a building, and can achieve installation free.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
1 is a hot water storage tank unit which is installed under the floor of a building in a horizontal type, 2 is a heating means comprising a heat pump unit, and 3 is a piping unit connecting the hot water storage tank unit 1 and the heating means 2.
[0008]
The hot water storage tank unit 1 is connected to a horizontally long hot water storage tank 4 for storing hot water, a hot water supply pipe 5 connected to an upper surface of the hot water storage tank 4 and a return pipe 6 from the heating means 2, and a lower part of the hot water storage tank 4. The water inlet pipe 7 and the outgoing pipe 8 leading to the heating means 2 are connected to each other, and a cylindrical water supply auxiliary pipe 9 communicating with the water inlet pipe 7 and supplying water extends in the longitudinal direction inside the hot water storage tank 4. And the end is closed.
[0009]
Further, the auxiliary water supply pipe 9 has a baffle plate 10 extending outward from the right and left side walls, and a pair of water supply holes 11 for discharging water obliquely downward to the auxiliary water supply pipe 9 below the baffle plate 10. Are provided in the longitudinal direction.
A donut-shaped cut-off plate 12 is provided around the entire vertical portion of the inner wall of the hot water storage tank 4 so as to protrude inward and block a water flow rising from below along the inner wall of the hot water storage tank 4. Have been.
[0010]
The heating means 2 includes a compressor 13 for compressing a refrigerant, a refrigerant-water heat exchanger 14 as a condenser, a decompressor 15, a heat pump circuit 17 including an air heat exchanger 16 as an evaporator, A blower 18 that blows air to the exchanger 16, a circulating pump 20 of variable capacity provided in the middle of a circulating circuit 19 including the return pipe 6 and the outgoing pipe 8, and a refrigerant-water heat exchanger 14 inlet side of the circulating circuit 19. A heat exchange inlet temperature sensor 21 for detecting the temperature of hot and cold water flowing into the refrigerant-water heat exchanger 14, and a refrigerant-water heat exchanger provided on the refrigerant-water heat exchanger 14 outlet side of the circulation circuit 19; A heat exchange outlet temperature sensor 22 for detecting the temperature of hot and cold water flowing out of the heater 14 and a heating control unit 23 for controlling the heating means 2 are provided.
[0011]
The piping unit 3 includes a mixing valve 25 that mixes high-temperature water from the tapping pipe 5 and low-temperature water from a branch pipe 24 branched from the inlet pipe 7, and a hot-water tap 26 connected downstream of the mixing valve 25. A hot water supply pipe 27, a hot water supply temperature sensor 28 provided in the hot water supply pipe 27, a hot water supply flow rate sensor 29 provided in the hot water supply pipe 27, and a hot water supply pipe branched from the hot water supply pipe 27 and connected to a circulation circuit 31 of a bathtub 30. 32, a heat insulation heater 33 and a bath circulation pump 34 for keeping the temperature of the bath water in the circulation circuit 31, a pressure reducing valve 35 of the water inlet pipe 7 and a pressure relief valve 36 of the hot water pipe 5, and control of these functional parts. The piping and functional parts are concentrated in the piping unit 3 so that the piping work at the time of installation and the maintenance work after the installation can be performed easily and efficiently. And those that are particularly effective are those particularly installing the hot water storage tank unit 1 under the floor of the building block.
[0012]
Next, the operation of the embodiment of the present invention will be described.
First, when heating the hot water in the hot water storage tank 4, the heating control unit 23 operates the heat pump circuit 17 and starts driving the circulation pump 20 of the circulation circuit 19. Hot water taken out from the lower part of the hot water storage tank 4 by the drive of the circulation pump 20 flows into the refrigerant-water heat exchanger 14 of the heating means 2, is heated and returned to the upper part of the hot water storage tank 4 via the circulation circuit 19. As a result, hot water is stored.
[0013]
Here, the output of the heat pump circuit 17 and the capacity of the circulation pump 20 are appropriately adjusted according to the detection values of the heat exchange inlet temperature sensor 21 and the heat exchange outlet temperature sensor 22 so that the hot water to be heated has a predetermined high temperature. It is variable. Specifically, the respective outputs and capacities are adjusted by feedforward control and / or feedback control according to the detection values of the heat exchange inlet temperature sensor 21 and the heat exchange outlet temperature sensor 22.
[0014]
Then, a hot water storage temperature sensor (not shown) provided on the side surface of the hot water storage tank 4 detects that a predetermined amount of high-temperature water has been stored, or the heat exchange inlet temperature sensor 21 detects a predetermined temperature or more. Then, the hot water supply control unit 37 instructs the heating control unit 23 to stop the heating operation, and the operations of the heat pump circuit 17 and the circulation pump 20 are stopped.
[0015]
On the other hand, when the hot water tap 26 is opened, the hot water stored in the hot water storage tank 4 is pushed out of the hot water storage tank 4 by the pressure from the water inlet pipe 7 to the hot water outlet pipe 5 and is controlled by the hot water supply controller 37. The mixing valve 25 mixes the low-temperature water in the branch pipe 24 with the temperature detected by the hot water supply temperature sensor 28 so as to be a predetermined temperature and supplies hot water through the hot water supply pipe 27. Hot water of a predetermined temperature can be applied to the bathtub 30 by heating. The predetermined temperature is arbitrarily set by an operation remote controller (not shown).
[0016]
Also, at this time, the water supply reduced by the use of the hot water supply flows into the hot water storage tank 4 at the water supply pressure, but this water supply is dispersed from the water supply hole 11 of the auxiliary water supply pipe 9 and further discharged downward. Further, the water flow that is going to rise immediately on the outer periphery of the water supply auxiliary pipe 9 after the discharge is obstructed by the baffle plate 10 and is spread outward, so that the momentum is weakened and the water flow rises as a large water flow or a mass of water. This prevents the boundary between hot water and water from being destroyed, so that high-temperature water can be satisfactorily supplied as hot water to the end.
[0017]
Furthermore, when the hot water layer reaches the upper part from the center of the hot water storage tank 4, there is a danger that the supply water discharged downward by the water supply auxiliary pipe 9 will rise vigorously along the inner wall of the hot water storage tank 4 and the boundary surface will be destroyed. According to the present invention, since the shut-off plate 12 is provided substantially at the center of the hot water storage tank 4, the water flow rising along the inner wall is suppressed by the shut-off plate 12 and guided to the center side. The hot water can be supplied to the end without flowing down the warm water layer without breaking the boundary.
[0018]
On the other hand, the connection between the hot water storage tank unit 1 and the piping unit 3 can be achieved by connecting the circulation circuit 19 between the tapping pipe 5, the water inlet pipe 7 and the heating means 2 on the piping unit 3 side. By connecting the piping unit 3 on the piping unit 3 side, even when the hot water storage tank unit 1 is installed under the floor of a building or the like and is too narrow to perform piping connection and maintenance, by installing the piping unit 3 in a wide place, Piping connection and maintenance are easily performed on the piping unit 3 side. Further, since hot water supply piping, bath piping, and these functional components are attached to the piping unit 3 in advance, the installation work is performed only by piping connection. It is very simple.
[0019]
Further, in this embodiment, the heat pump type water heater has been described. However, the present invention is not limited to this, and the same effect can be obtained by an electric water heater using an electric heater as a heating means.
[0020]
【The invention's effect】
As described above, according to the present invention, piping connection and maintenance at the time of installation are easily performed by a piping unit remote from the hot water storage tank unit, and how and where the hot water storage tank unit is installed However, the installation position of the piping unit can be freely selected, and the piping connection and maintenance are performed reliably. This is extremely effective especially when the hot water storage tank unit is installed under the floor of the building, and installation free is reduced. It can be realized.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hot water supply type hot water supply apparatus to which one embodiment of the present invention is attached.
FIG. 2 is a sectional view of the hot water storage tank.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hot water storage tank unit 2 Heating means 3 Piping unit 5 Hot water pipe 7 Water inlet pipe

Claims (2)

入水管と出湯管が接続され湯水を貯湯する貯湯タンクユニットと、前記貯湯タンクユニット内の湯水を加熱する加熱手段とを備え、前記貯湯タンクユニットと加熱手段との間には、該貯湯タンクユニットと加熱手段とを結ぶ配管及び、給湯用の配管や機能部品及び給湯制御部を収納した配管ユニットを備えた事を特徴とする貯湯式給湯装置。A hot water storage tank unit that connects the water inlet pipe and the hot water pipe and stores hot water; and a heating unit that heats the hot water in the hot water storage tank unit. A hot water supply type hot water supply device, comprising: a pipe connecting the heating means and a hot water supply; and a piping unit accommodating a hot water supply pipe, a functional component, and a hot water supply control unit. 前記配管ユニットには、風呂用の配管及び機能部品も収納した事を特徴とする請求項1記載の貯湯式給湯装置。The hot-water storage type hot-water supply device according to claim 1, wherein the piping unit also contains bath piping and functional parts.
JP2002256273A 2002-09-02 2002-09-02 Hot water storage-type water heater Pending JP2004093041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002256273A JP2004093041A (en) 2002-09-02 2002-09-02 Hot water storage-type water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002256273A JP2004093041A (en) 2002-09-02 2002-09-02 Hot water storage-type water heater

Publications (1)

Publication Number Publication Date
JP2004093041A true JP2004093041A (en) 2004-03-25

Family

ID=32061548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002256273A Pending JP2004093041A (en) 2002-09-02 2002-09-02 Hot water storage-type water heater

Country Status (1)

Country Link
JP (1) JP2004093041A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006275412A (en) * 2005-03-29 2006-10-12 Noritz Corp Heat recovery device for cogeneration system and its manufacturing method
JP2020122651A (en) * 2020-05-15 2020-08-13 エナテックス株式会社 Water supply/drain unit and solar heat utilization system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006275412A (en) * 2005-03-29 2006-10-12 Noritz Corp Heat recovery device for cogeneration system and its manufacturing method
JP2020122651A (en) * 2020-05-15 2020-08-13 エナテックス株式会社 Water supply/drain unit and solar heat utilization system
JP7012118B2 (en) 2020-05-15 2022-01-27 エナテックス株式会社 Solar heat utilization system and control method of solar heat utilization system

Similar Documents

Publication Publication Date Title
JP4362118B2 (en) Hot water storage water heater
JP2008224076A (en) Hot water supplying device and hot water supplying/heating device
JP4104805B2 (en) Heat pump water heater
JP2004093041A (en) Hot water storage-type water heater
JP2006003077A (en) Heat pump type hot water supply apparatus
JP2007139258A (en) Hot water storage type water heater
JP3869801B2 (en) Heat pump water heater / heater
JP2005121284A (en) Heat pump water heater
JP4621518B2 (en) Bathroom mist equipment
JP2005147557A (en) Hot water supply apparatus
JP2004198055A (en) Hot water supply type heating device
JP2006002959A (en) Heat pump type water heater
JP2009109188A (en) Heat pump water heater
JP2004101120A (en) Hot water storage type hot water supply apparatus
JP2003194347A (en) Multifunctional hot water system
JP3850653B2 (en) Heat pump type water heater
JP2005241167A (en) Heat pump type hot water supplying/heating system
JP2004093040A (en) Hot water storage-type water heater
JP2004101121A (en) Hot water storage type hot water supply apparatus
JP3570521B2 (en) Hot water heating system
KR20020073763A (en) apparatus for repeatedly heating warm-water in gas boiler
JP4037748B2 (en) Hot water storage water heater
JP2009074797A (en) Heat pump water heater
JP2004183993A (en) Hot water supply device
JP4072140B2 (en) Hot water storage water heater