JPS621509B2 - - Google Patents
Info
- Publication number
- JPS621509B2 JPS621509B2 JP56059796A JP5979681A JPS621509B2 JP S621509 B2 JPS621509 B2 JP S621509B2 JP 56059796 A JP56059796 A JP 56059796A JP 5979681 A JP5979681 A JP 5979681A JP S621509 B2 JPS621509 B2 JP S621509B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- pipe
- storage tank
- float
- water storage
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 199
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- 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)
- Details Of Fluid Heaters (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は給湯装置に係り、特に貯湯槽内の水位
が変化する給湯装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water heater, and more particularly to a water heater in which the water level in a hot water storage tank changes.
従来の貯湯槽内の水位が変化する給湯装置は、
貯湯槽を止水弁を介して上水道に接続し、貯湯槽
内に蓄えらた水を循環させる循環管を設け、この
循環管の途中に循環ポンプおよび加熱装置を設
け、貯湯槽に蓄えられた水を外部へ導く給湯管を
設け、この給湯管の途中に給湯ポンプを設けたも
のがある。而して、貯湯槽内の水位が変化するた
め、循環管の貯湯槽内への吐出開口および給湯管
の貯湯槽内からの吸込開口は貯湯槽内の低い位置
に一定して設けていた。又、貯湯槽内に蓄えられ
た水は、温度による比重差によつて上部にいくに
従つて温度が高くなる。
Conventional water heaters that change the water level in the hot water storage tank are
The hot water storage tank is connected to the water supply via a water stop valve, and a circulation pipe is installed to circulate the water stored in the hot water storage tank.A circulation pump and heating device are installed in the middle of this circulation pipe, and the water stored in the hot water storage tank is Some have a hot water supply pipe that leads water to the outside, and a hot water pump installed in the middle of this hot water supply pipe. Since the water level in the hot water storage tank changes, the discharge opening of the circulation pipe into the hot water storage tank and the suction opening of the hot water supply pipe from the inside of the hot water storage tank are always provided at a low position within the hot water storage tank. Further, the temperature of the water stored in the hot water storage tank increases as it goes to the top due to the difference in specific gravity due to temperature.
〔発明が解決しようとする問題点〕
しかし、かかる従来の給湯装置は、貯湯槽内か
ら循環されて加熱装置にて加熱された水の貯湯槽
内への吐出し位置が下部であるため、貯湯槽内の
水位が高い場合には温度の低い水の中に加熱され
た水が吐出され、高温の水がすぐに得られないと
いう問題点があつた。又、給湯管の貯湯槽内から
の吸水位置が下部であるため、貯湯槽内の水位が
高い場合には温度の低い水が供給されるという問
題点があつた。[Problems to be Solved by the Invention] However, in such conventional water heaters, the water that has been circulated from the hot water storage tank and heated by the heating device is discharged into the hot water storage tank at the bottom, so the hot water storage When the water level in the tank is high, the heated water is discharged into the low-temperature water, causing a problem in that high-temperature water cannot be obtained immediately. Furthermore, since the water supply pipe absorbs water from the hot water tank at the lower part, there is a problem in that when the water level in the hot water tank is high, water at a low temperature is supplied.
本発明はかかる問題点を解決するためになされ
たもので、貯湯槽１を止水弁３を介して上水道に
接続し、前記貯湯槽１内に蓄えらた水を循環させ
る循環管９を設け、この循環管９の途中に循環ポ
ンプ１０および加熱装置１１を設け、前記貯湯槽
１に蓄えられた水を外部へ導く給湯管６を設け、
この給湯管６の途中に給湯ポンプ１４を設け、前
記貯湯槽１内に蓄えられた水の水位が変化する給
湯装置において、前記循環管９に弁７を設け、前
記給湯管６に弁８を設けて、この両弁７，８を交
互に開閉せしめ、前記循環管９の前記貯湯槽１へ
の吐出部と前記給湯管６の前記貯湯槽１への吸込
部とを同一の連通管６Ａとし、この連通管６Ａの
先端開口を前記貯湯槽１内の下部へ導びき、この
連通管６Ａの先端開口を囲んでフロート管５Ｂを
配置し、このフロート管５Ｂの上部にフロート部
材５Ａを取付けてこのフロート管５Ｂを水位の変
化によつて上下動可能とし、前記フロート管５Ｂ
の水面近傍に吐出吸込孔１２を設けたことを特徴
とする給湯装置としたものである。
The present invention has been made to solve this problem, and is provided with a circulation pipe 9 that connects the hot water storage tank 1 to the water supply via a water stop valve 3 and circulates the water stored in the hot water storage tank 1. , a circulation pump 10 and a heating device 11 are provided in the middle of this circulation pipe 9, and a hot water supply pipe 6 is provided for guiding the water stored in the hot water storage tank 1 to the outside,
In a hot water supply device in which a hot water pump 14 is provided in the middle of the hot water supply pipe 6 and the water level of the water stored in the hot water storage tank 1 changes, a valve 7 is provided in the circulation pipe 9 and a valve 8 is provided in the hot water supply pipe 6. The valves 7 and 8 are opened and closed alternately, and the discharge part of the circulation pipe 9 to the hot water storage tank 1 and the suction part of the hot water supply pipe 6 to the hot water storage tank 1 are connected to the same communication pipe 6A. , the tip opening of this communicating pipe 6A is guided to the lower part of the hot water storage tank 1, a float tube 5B is arranged surrounding the tip opening of this communicating tube 6A, and a float member 5A is attached to the upper part of this float tube 5B. This float pipe 5B can be moved up and down depending on the change in water level, and the float pipe 5B is
This hot water supply device is characterized in that a discharge suction hole 12 is provided near the water surface.
かかる給湯装置において、貯湯槽１内に上水を
供給するときは、止水弁３を開くことにより行え
る。
In this hot water supply device, supplying clean water into the hot water storage tank 1 can be done by opening the water stop valve 3.
貯湯槽１内に蓄えられた水を加熱するときは、
循環管９の弁７を開き、給湯管６の弁８を閉じ
て、循環ポンプ１０を運転すると共に、加熱装置
１１にて循環管９を流れる水を加熱することによ
り行える。この場合、循環管９から貯湯槽１への
吐出しは、フロート管５Ｂの吐出吸込孔１２より
行なわれる。このフロート管５Ｂはフロート部材
５Ａにて水位の変化に応じて上下動し、吐出吸込
孔１２が常に水面近傍に位置するので、加熱され
た水は貯湯槽１内の水面近傍へ吐出される。これ
によつて、貯湯槽１内の水位が変化しても、常に
貯湯槽１の水面近傍から素早く高温にすることが
できる。 When heating the water stored in the hot water tank 1,
This can be done by opening the valve 7 of the circulation pipe 9, closing the valve 8 of the hot water supply pipe 6, operating the circulation pump 10, and heating the water flowing through the circulation pipe 9 with the heating device 11. In this case, the hot water is discharged from the circulation pipe 9 to the hot water storage tank 1 through the discharge suction hole 12 of the float pipe 5B. The float pipe 5B is moved up and down by the float member 5A according to changes in the water level, and the discharge and suction holes 12 are always located near the water surface, so that the heated water is discharged near the water surface in the hot water storage tank 1. Thereby, even if the water level in the hot water storage tank 1 changes, the temperature can always be raised quickly from the vicinity of the water surface of the hot water storage tank 1.
貯湯槽１内に蓄えられた水を給湯するときは、
循環管９の弁７を閉じ、給湯管６の弁８を開い
て、給湯ポンプ１４を運転することにより行え
る。この場合、貯湯槽１から給湯管９への吸込み
は、フロート管５Ｂの吐出吸込孔１２より行なわ
れる。このフロート管５Ｂは前述したようにフロ
ート部材５Ａにて水位の変化に応じて上下動し、
吐出吸込孔１２が常に水面近傍に位置するので、
貯湯槽１内の水位が変化しても、常に貯湯槽１内
の最も温度の高い水面近傍の水が給湯できる。 When supplying water stored in hot water tank 1,
This can be done by closing the valve 7 of the circulation pipe 9, opening the valve 8 of the hot water supply pipe 6, and operating the hot water supply pump 14. In this case, suction from the hot water storage tank 1 to the hot water supply pipe 9 is performed through the discharge suction hole 12 of the float pipe 5B. As mentioned above, this float pipe 5B moves up and down according to changes in the water level by the float member 5A,
Since the discharge and suction holes 12 are always located near the water surface,
Even if the water level in the hot water storage tank 1 changes, hot water can always be supplied from the water near the highest temperature water surface in the hot water storage tank 1.
又、循環管９と給湯管６とを１本の連通管６Ａ
として貯湯槽１へ導びいたので、貯湯槽１への配
管が簡易に行うことができ、この１本の連通管６
Ａをフロート管５Ｂで囲んだので、２本の配管を
囲む場合に比較してフロート管５Ｂを細くしてフ
ロート管５Ｂ内の容積を少なくすることができ、
加熱運転後に長時間たつてこのフロート管５Ｂ内
の下部の水の温度が低くなつたときの影響を低温
水の供給を最少限とすることができる。 Moreover, the circulation pipe 9 and the hot water supply pipe 6 are connected to one communication pipe 6A.
Since the piping to the hot water storage tank 1 can be easily done, this one communication pipe 6
Since A is surrounded by the float pipe 5B, the float pipe 5B can be made thinner and the volume inside the float pipe 5B can be reduced compared to the case where two pipes are surrounded.
The influence when the temperature of the water in the lower part of the float tube 5B becomes low after a long period of time after the heating operation can be minimized by supplying low-temperature water.
以下、本発明の一実施例を第１図に基づいて説
明する。
An embodiment of the present invention will be described below with reference to FIG.
貯湯槽１は止水弁３を介して上水道に接続して
いる。尚、止水弁３から貯湯槽１へはフロート４
を有するボールタツプ２を設けている。前記貯湯
槽１内に蓄えらた水を循環させる循環管９を設
け、この循環管９の途中に循環ポンプ１０および
加熱装置１１を設けている。前記貯湯槽１に蓄え
られた水を外部へ導く給湯管６を設け、この給湯
管６の途中に給湯ポンプ１４を設けている。前記
貯湯槽１内に蓄えられた水は給湯管６より給湯す
ることにより、その水位が変化する。前記循環管
９および給湯管６に弁７および弁８を設けて、こ
の両弁７，８を交互に開閉せしめるようになつて
いる。前記循環管９の前記貯湯槽１への吐出部と
前記給湯管６の前記貯湯槽１への吸込部とを同一
の連通管６Ａとし、この連通管６Ａの先端開口を
前記貯湯槽１内の下部へ導びいている。この連通
管６Ａの先端開口を囲んでフロート管５Ｂを配置
し、このフロート管５Ｂの上部にフロート部材５
Ａを取付けてこのフロート管５Ｂを水位の変化に
よつて上下動可能としている。又、前記フロート
管５Ｂの水面近傍に吐出吸込孔１２を設けてい
る。 The hot water storage tank 1 is connected to the water supply via a water stop valve 3. In addition, float 4 is connected from water stop valve 3 to hot water tank 1.
A ball tap 2 is provided. A circulation pipe 9 for circulating water stored in the hot water storage tank 1 is provided, and a circulation pump 10 and a heating device 11 are provided in the middle of the circulation pipe 9. A hot water supply pipe 6 is provided to guide the water stored in the hot water storage tank 1 to the outside, and a hot water supply pump 14 is provided in the middle of this hot water supply pipe 6. The water level of the water stored in the hot water storage tank 1 is changed by supplying hot water through the hot water supply pipe 6. A valve 7 and a valve 8 are provided in the circulation pipe 9 and the hot water supply pipe 6, and the valves 7 and 8 are opened and closed alternately. The discharge part of the circulation pipe 9 to the hot water storage tank 1 and the suction part of the hot water supply pipe 6 to the hot water storage tank 1 are the same communication pipe 6A, and the tip opening of this communication pipe 6A is connected to the hot water storage tank 1. leading to the bottom. A float tube 5B is arranged surrounding the tip opening of this communication tube 6A, and a float member 5 is placed above the float tube 5B.
A is attached so that the float tube 5B can be moved up and down depending on changes in the water level. Further, a discharge suction hole 12 is provided near the water surface of the float pipe 5B.
かかる給湯装置において、貯湯槽１内に上水を
供給するときは、止水弁３を開くことにより行え
る。 In this hot water supply device, supplying clean water into the hot water storage tank 1 can be done by opening the water stop valve 3.
貯湯槽１内に蓄えられた水を加熱するときは、
循環管９の弁７を開き、給湯管６の弁８を閉じ
て、循環ポンプ１０を運転すると共に、加熱装置
１１にて循環管９を流れる水を加熱することによ
り行える。この場合、循環管９から貯湯槽１への
吐出しは、フロート管５Ｂの吐出吸込孔１２より
行なわれる。このフロート管５Ｂはフロート部材
５Ａにて水位の変化に応じて上下動し、吐出吸込
孔１２が常に水面近傍に位置するので、加熱され
た水は常に貯湯槽１内の水面近傍へ吐出される。
これによつて、貯湯槽１内の水位が変化しても、
常に貯湯槽１の水面近傍から素早く高温にするこ
とができる。 When heating the water stored in the hot water tank 1,
This can be done by opening the valve 7 of the circulation pipe 9, closing the valve 8 of the hot water supply pipe 6, operating the circulation pump 10, and heating the water flowing through the circulation pipe 9 with the heating device 11. In this case, the hot water is discharged from the circulation pipe 9 to the hot water storage tank 1 through the discharge suction hole 12 of the float pipe 5B. This float pipe 5B is moved up and down by the float member 5A according to changes in the water level, and the discharge suction hole 12 is always located near the water surface, so heated water is always discharged near the water surface in the hot water storage tank 1. .
As a result, even if the water level in the hot water tank 1 changes,
The temperature can always be raised quickly from near the water surface of the hot water storage tank 1.
貯湯槽１内に蓄えられた水を給湯するときは、
循環管９の弁７を閉じ、給湯管６の弁８を開い
て、給湯ポンプ１４を運転することにより行え
る。この場合、貯湯槽１から給湯管９への吸込み
は、フロート管５Ｂの吐出吸込孔１２より行なわ
れる。このフロート管５Ｂは前述したようにフロ
ート部材５Ａにて水位の変化に応じて上下動し、
吐出吸込孔１２が常に水面近傍に位置するので、
貯湯槽１内の水位が変化しても、常に貯湯槽１内
の最も温度の高い水面近傍の水が給湯できる。 When supplying water stored in hot water tank 1,
This can be done by closing the valve 7 of the circulation pipe 9, opening the valve 8 of the hot water supply pipe 6, and operating the hot water supply pump 14. In this case, suction from the hot water storage tank 1 to the hot water supply pipe 9 is performed through the discharge suction hole 12 of the float pipe 5B. As mentioned above, this float pipe 5B moves up and down according to changes in the water level by the float member 5A,
Since the discharge and suction holes 12 are always located near the water surface,
Even if the water level in the hot water storage tank 1 changes, hot water can always be supplied from the water near the highest temperature water surface in the hot water storage tank 1.
又、循環管９と給湯管６とを１本の連通管６Ａ
として貯湯槽１へ導びいたので、貯湯槽１への配
管が簡易に行うことができ、この１本の連通管６
Ａをフロート管５Ｂで囲んだので２本の配管を囲
む場合に比較してフロート管５Ｂを細くしてフロ
ート管５Ｂ内の容積を少なくすることができ、加
熱運転後に長時間たつてこのフロート管５Ｂ内の
下部の水の温度が低くなつたときの影響を低温水
の供給を最少限とすることができる。 Moreover, the circulation pipe 9 and the hot water supply pipe 6 are connected to one communication pipe 6A.
Since the piping to the hot water storage tank 1 can be easily done, this one communication pipe 6
Since A is surrounded by the float pipe 5B, it is possible to make the float pipe 5B thinner and reduce the volume inside the float pipe 5B compared to the case where two pipes are surrounded. The influence when the temperature of the water in the lower part of 5B becomes low can be minimized by supplying low-temperature water.
本発明によれば、貯湯槽１内の水位が変化して
も常に貯湯槽１の水面近傍から素早く高温にする
ことができると共に、貯湯槽１内の水位が変化し
ても常に貯湯槽１の水面近傍の温度の高い水を給
湯でき、しかも、配管が簡易に行うことができる
と共に、フロート管５Ｂ内の下部の水の温度低下
の影響を最少限にすることができる給湯装置を提
供することができる。
According to the present invention, even if the water level in the hot water storage tank 1 changes, the temperature in the hot water storage tank 1 can always be raised quickly from the vicinity of the water surface, and even if the water level in the hot water storage tank 1 changes, the temperature in the hot water storage tank 1 can always be raised to a high temperature. To provide a hot water supply device capable of supplying high temperature water near the water surface, allowing easy piping, and minimizing the influence of a drop in temperature of water at the lower part of a float pipe 5B. I can do it.
第１図は本発明の給湯装置の断面説明図であ
る。
１……貯湯槽、３……止水弁、５……フロート
部材、５Ｂ……フロート管、６……給湯管、６Ａ
……連通管、７，８……弁、９……循環管、１０
……循環ポンプ、１１……加熱装置、１２……吐
出吸込孔、１４……給湯ポンプ。
FIG. 1 is an explanatory cross-sectional view of the water heater of the present invention. 1... Hot water storage tank, 3... Water stop valve, 5... Float member, 5B... Float pipe, 6... Hot water supply pipe, 6A
...Communication pipe, 7, 8...Valve, 9...Circulation pipe, 10
...Circulation pump, 11...Heating device, 12...Discharge/suction hole, 14...Hot water pump.
Claims (1)
し、前記貯湯槽１内に蓄えらた水を循環させる循
環管９を設け、この循環管９の途中に循環ポンプ
１０および加熱装置１１を設け、前記貯湯槽１に
蓄えられた水を外部へ導く給湯管６を設け、この
給湯管６の途中に給湯ポンプ１４を設け、前記貯
湯槽１内に蓄えられた水の水位が変化する給湯装
置において、前記循環管９に弁７を設け、前記給
湯管６に弁８を設けて、この両弁７，８を交互に
開閉せしめ、前記循環管９の前記貯湯槽１への吐
出部と前記給湯管６の前記貯湯槽１への吸込部と
を同一の連通管６Ａとし、この連通管６Ａの先端
開口を前記貯湯槽１内の下部へ導びき、この連通
管６Ａの先端開口を囲んでフロート管５Ｂを配置
し、このフロート管５Ｂの上部にフロート部材５
Ａを取付けてこのフロート管５Ｂを水位の変化に
よつて上下動可能とし、前記フロート管５Ｂの水
面近傍に吐出吸込孔１２を設けたことを特徴とす
る給湯装置。1. A hot water storage tank 1 is connected to the water supply via a water stop valve 3, and a circulation pipe 9 is provided to circulate the water stored in the hot water storage tank 1, and a circulation pump 10 and a heating device 11 are installed in the middle of the circulation pipe 9. A hot water supply pipe 6 is provided to guide the water stored in the hot water storage tank 1 to the outside, and a hot water pump 14 is provided in the middle of the hot water supply pipe 6, so that the water level of the water stored in the hot water storage tank 1 changes. In the hot water supply system, the circulation pipe 9 is provided with a valve 7, the hot water supply pipe 6 is provided with a valve 8, and both valves 7 and 8 are opened and closed alternately, and the discharge part of the circulation pipe 9 to the hot water storage tank 1 is controlled. and the suction portion of the hot water supply pipe 6 into the hot water storage tank 1 are made into the same communication pipe 6A, and the tip opening of this communication pipe 6A is guided to the lower part of the hot water storage tank 1, and the tip opening of this communication pipe 6A is A float pipe 5B is arranged around the float pipe 5B, and a float member 5 is placed above the float pipe 5B.
A hot water supply apparatus, characterized in that a float pipe 5B is attached to the float pipe 5B so as to be movable up and down according to changes in the water level, and a discharge suction hole 12 is provided near the water surface of the float pipe 5B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5979681A JPS57175841A (en) | 1981-04-22 | 1981-04-22 | Hot water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5979681A JPS57175841A (en) | 1981-04-22 | 1981-04-22 | Hot water supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57175841A JPS57175841A (en) | 1982-10-28 |
| JPS621509B2 true JPS621509B2 (en) | 1987-01-13 |
Family
ID=13123591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5979681A Granted JPS57175841A (en) | 1981-04-22 | 1981-04-22 | Hot water supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57175841A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0670522B2 (en) * | 1983-04-05 | 1994-09-07 | 松下電器産業株式会社 | Hot water boiler |
| JPS60187910U (en) * | 1984-05-21 | 1985-12-12 | 大同ほくさん株式会社 | Bathtub hot water adjustment device |
| JPS642122Y2 (en) * | 1984-10-31 | 1989-01-18 | ||
| JPS6238554U (en) * | 1985-08-23 | 1987-03-07 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0213891U (en) * | 1988-07-13 | 1990-01-29 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61663Y2 (en) * | 1979-03-30 | 1986-01-10 |
-
1981
- 1981-04-22 JP JP5979681A patent/JPS57175841A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0213891U (en) * | 1988-07-13 | 1990-01-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57175841A (en) | 1982-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3705574A (en) | Water heating and storage system with mixing valve | |
| JPS6029856B2 (en) | Device for obtaining hot water | |
| JPS621509B2 (en) | ||
| JPS58215309A (en) | Temperature control equipment of mold for plastic molding | |
| JPS5666644A (en) | Controlling device for temperature of forced circulation type bath unit | |
| US4534408A (en) | Induction device fitted inside a tank for drawing in fluids such as liquid fuels | |
| CN204535993U (en) | A kind of engine water temperature regulating loop | |
| ATE4934T1 (en) | WATER TANK HEATER. | |
| KR20140140231A (en) | The mat for circulating the cool water | |
| CN207085955U (en) | Flow channel type heater and reagent biochemical reaction device | |
| US2189490A (en) | Water heater | |
| JPH0786245B2 (en) | Hot water supply device | |
| US3082915A (en) | Hot water dispenser | |
| JP2005315505A (en) | Electric water heater with reheating function, and method of controlling temperature of water in bathtub | |
| JP7100749B1 (en) | Hot bath facility | |
| JPS6311576B2 (en) | ||
| JPH08570Y2 (en) | Steam generator | |
| CN220417653U (en) | Energy-saving warm water boiling equipment | |
| JPS6215727Y2 (en) | ||
| US1670665A (en) | Water heater | |
| KR200438986Y1 (en) | Auto water supply device of briquet boiler | |
| JPS6215728Y2 (en) | ||
| JPS634916Y2 (en) | ||
| JPS5910528Y2 (en) | water heater | |
| JPH0733087Y2 (en) | Freezing prevention device in bath equipment |