JPS63161350A - Freeze preventive device of hot water supplier with forced additional burning means - Google Patents
Freeze preventive device of hot water supplier with forced additional burning meansInfo
- Publication number
- JPS63161350A JPS63161350A JP61313928A JP31392886A JPS63161350A JP S63161350 A JPS63161350 A JP S63161350A JP 61313928 A JP61313928 A JP 61313928A JP 31392886 A JP31392886 A JP 31392886A JP S63161350 A JPS63161350 A JP S63161350A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- bath
- solenoid valve
- water supply
- circuit
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 230000003449 preventive effect Effects 0.000 title abstract 9
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 230000002528 anti-freeze Effects 0.000 claims description 19
- 238000007710 freezing Methods 0.000 claims description 17
- 230000008014 freezing Effects 0.000 claims description 14
- 108010053481 Antifreeze Proteins Proteins 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000003303 reheating Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 238000003287 bathing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035935 pregnancy Effects 0.000 description 1
Landscapes
- Control For Baths (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は給湯及び風呂追突等を行える給湯器の凍結防止
装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an anti-freezing device for a water heater that can supply hot water, add bath water, and the like.
従来の技術
従来この種の強制追焚付給湯器の構造は第２図の様にな
っていた。すなわち、給湯熱交換器２の給湯側よシ給湯
分岐回路４を分岐し、第１電磁弁６、縁切り用のホッパ
ー７と第２電磁弁８を介して風呂回路２２のポンプ１１
の吸込側に、前記給湯分岐回路４と風呂分岐回路９を間
接的に接続している。そしてボンデ１１の作用により、
浴そう２０に給湯時は第１電磁弁６、第２電磁弁８を開
き、第３電磁弁１３を閉じた状態で風呂往き管１５を通
じて給湯してお湯張りを行うようになっている。また風
呂回路２２の凍結防止用には、外気温度の低下で凍結防
止スイッチ１６のＯＮ時は、第２電磁弁８を閉じ、第３
電磁弁１３を開き、ポンプ１１の作用により浴そう水を
風呂熱交換器１０、風呂往き管１５、浴槽２０、風呂戻
シ管１９、第３電磁弁１３、流水スイッチによりなる風
呂回路２２に循環せしめ凍結を防止する。なお、図中１
８は制御ユニットである。2. Description of the Related Art Conventionally, the structure of this type of forced reheating water heater was as shown in FIG. That is, the hot water supply branch circuit 4 is branched to the hot water supply side of the hot water heat exchanger 2, and the pump 11 of the bath circuit 22 is connected via the first solenoid valve 6, the edge cutting hopper 7, and the second solenoid valve 8.
The hot water supply branch circuit 4 and bath branch circuit 9 are indirectly connected to the suction side of the bathtub. And due to the action of Bonde 11,
When hot water is supplied to the bathtub 20, the first solenoid valve 6 and the second solenoid valve 8 are opened, and the third solenoid valve 13 is closed, and hot water is supplied through the bath pipe 15 to fill the bathtub with hot water. In order to prevent the bath circuit 22 from freezing, when the anti-freeze switch 16 is turned on due to a drop in outside temperature, the second solenoid valve 8 is closed and the third solenoid valve 8 is closed.
The solenoid valve 13 is opened, and the action of the pump 11 circulates the bath water to the bath circuit 22 consisting of the bath heat exchanger 10, the bath outgoing pipe 15, the bathtub 20, the bath return pipe 19, the third solenoid valve 13, and the running water switch. Prevents freezing. In addition, 1 in the figure
8 is a control unit.
発明が解決しようとする問題点
この様な構造のものでは、風呂回路２２の凍結防止を行
うには、浴そう２０には常に一定水位以上の水を入れて
おく必要があシ、入浴終了後、お湯を捨てられない。ま
た凍結予防のため、入浴終了後、一定水位以上の水がな
い場合残＃）湯”に更に足し水を行う必要がある。従っ
て浴そう２０に一定水位以上水を張るのを忘れると、ポ
ンプ作用がなくなり風呂回路２２が凍結するという問題
、そして翌日など入浴のための準備時、前日の湯を捨て
るための作業が必要という手間がかかシ、かつ浴そう壁
面が残り湯により汚れるという問題があった。Problems to be Solved by the Invention With this type of structure, in order to prevent the bath circuit 22 from freezing, it is necessary to always keep water above a certain water level in the bath tub 20, and after bathing is completed. , I can't throw away the hot water. In addition, to prevent freezing, if there is no water above a certain level after bathing, it is necessary to add more water to the remaining hot water. Therefore, if you forget to fill the bathtub 20 with water above a certain level, the pump There is the problem that the bath circuit 22 freezes due to lack of action, and when preparing for bathing the next day, it is time-consuming to discard the previous day's hot water, and the wall surface when taking a bath becomes dirty with the remaining hot water. was there.
本発明は、一般の入浴慣習と同じく入浴後は水を捨てて
浴そうに水を張ることなく、自動的に風呂回路２２の凍
結防止を行い、翌日など次の入浴時はお湯はりからすぐ
に作業ができ、かつ浴そうの汚れを少なくする等を目的
とするものである。The present invention automatically prevents the bath circuit 22 from freezing without discarding the water after taking a bath and refilling the water as in the general bathing practice. The purpose is to make the work easier and to reduce the amount of dirt on the bathtub.
問題点を解決するための手段
前記問題点を解決するための本発明の技術的手段は、給
湯回路より分岐し、かつ第１電磁弁を有する給湯分岐回
路と、この給湯分岐回路に縁切りして接続しかつ第２電
磁弁を有する風呂分岐回路と、この風呂分岐回路に吸込
側を接続した循環用ポンプ、このポンプの風呂分岐回路
とめ接続部より上流に位置する第３電磁弁、この第３電
磁弁とポンプ°と風呂熱交換器を接続した風呂往管及び
風呂戻り管よりなる風呂回路と、風呂往管と風呂戻り管
の第３電磁弁の上流側との間を接続し、かつ第４電磁弁
を有するバイパス路と、前記風呂回路の凍結を防止する
凍結防止スイッチと、この凍結防止スイッチがＯＮの時
、第１、第２、第４電磁弁を開き、第３電磁弁を閉じ、
ポンプを運転し、かつ第１電磁弁を開いている時は給湯
の燃焼を行わしめ、また凍結防止スイッチがＯＦＦの時
、第１、第２、第４電磁弁を閉じ、第３電磁弁を開きポ
ンプの運転および給湯回路を動作せしめる制御ユニット
とにより構成するものである。Means for Solving the Problems The technical means of the present invention for solving the problems described above includes a hot water supply branch circuit branching from the hot water supply circuit and having a first electromagnetic valve, and a hot water supply branch circuit that is connected to the hot water supply branch circuit. a bath branch circuit connected to the bath branch circuit and having a second electromagnetic valve; a circulation pump having a suction side connected to the bath branch circuit; a third electromagnetic valve located upstream of the bath branch circuit stop connection portion of the pump; A bath circuit consisting of a bath outgoing pipe and a bath return pipe that connect a solenoid valve, a pump and a bath heat exchanger, and a bath circuit that connects the upstream side of the third solenoid valve of the bath outgoing pipe and the bath return pipe, and a bypass path having four solenoid valves; an anti-freeze switch for preventing the bath circuit from freezing; when the anti-freeze switch is ON, the first, second and fourth solenoid valves are opened and the third solenoid valve is closed; ,
When the pump is operating and the first solenoid valve is open, hot water is combusted, and when the antifreeze switch is OFF, the first, second, and fourth solenoid valves are closed and the third solenoid valve is closed. It consists of a control unit that operates the open pump and the hot water supply circuit.
作 用 この技術的手段による作用は、以下の様になる。For production The effect of this technical means is as follows.
すなわち、風呂回路め凍結予防のために設定された温度
レベル以下に外気温が低下すると凍結防止スイッチがｏ
Ｎし、制御ユニットによる凍結防止運転が働き、バイパ
ス路中の第４電磁弁は、開となる。さらにポンプ上流側
の第３電磁弁は閉、風呂分岐回路の第２電磁弁は開、お
よび給湯分岐回路の第１電磁弁も開となる。この時給湯
側の燃焼が開始すると共にポンプも駆動し、ポンプ作用
によシ給湯回路の水は、給湯分岐回路、風呂分岐回路お
よび風呂往き管と風呂戻り管を通り浴そうに流れこむ。In other words, when the outside temperature drops below the temperature level set to prevent the bath circuit from freezing, the anti-freeze switch turns on.
N, the antifreeze operation by the control unit is activated, and the fourth solenoid valve in the bypass path is opened. Further, the third solenoid valve on the upstream side of the pump is closed, the second solenoid valve of the bath branch circuit is opened, and the first solenoid valve of the hot water supply branch circuit is also opened. At this time, combustion on the hot water supply side starts and the pump is also driven, and due to the action of the pump, the water in the hot water supply circuit flows into the hot water supply circuit through the hot water supply branch circuit, the bath branch circuit, the bath going pipe and the bath returning pipe as if taking a bath.
次に給湯側の燃焼を行うことで、給湯器本体内の温度が
上昇し、風呂回路の凍結予防レベル以上になると凍結防
止スイッチが０ＦＦＬ制御ユニツトによシ第１電磁弁は
閉となり給湯の燃焼は停止する。また第２電磁弁、第４
電磁弁は閉、第３電磁弁は開となる。この運転状態が断
続的に繰シ返され、風呂回路の凍結防止が自動的に行わ
れる。Next, by performing combustion on the hot water supply side, the temperature inside the water heater rises, and when it exceeds the freezing prevention level of the bath circuit, the antifreeze switch is activated by the 0FFL control unit, and the first solenoid valve is closed, and the hot water is combusted. stops. Also, the second solenoid valve, the fourth
The solenoid valve is closed and the third solenoid valve is opened. This operating state is repeated intermittently, and the bath circuit is automatically prevented from freezing.
実施例 以下本発明の実施例を添付図面に基づき説明する。Example Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図において、給湯回路５は給水管５ａ、給湯熱交換
器２、給湯管５ｂで構成され、かつ給水管５ａの途中に
水の流れを検出する給湯流水スイッチ３を有している。In FIG. 1, a hot water supply circuit 5 includes a water supply pipe 5a, a hot water heat exchanger 2, and a hot water supply pipe 5b, and has a hot water supply flow switch 3 in the middle of the water supply pipe 5a to detect the flow of water.
また給湯熱交換器２の下流に給湯分岐回路４を設け、第
１電磁弁６にて給湯分岐回路４の開閉を行い水を制御す
る。給湯分岐回路４は間接的にホッパー７と第２電磁弁
８を配した風呂分岐回路９に連絡され、この風呂分岐回
路９は風呂回路２２のポンプ１１の上流側すなわち吸込
側に接続される。風呂回路２２は風呂熱交換器１０．風
呂往管１５、浴そう２０、風呂戻り管１９を介し、風呂
分岐回路９との接続部の上流側に設けた第３電磁弁１３
を経てポンプ１１に接続され、さらにポンプ１１の下流
側で風呂熱交換器１０と接続する構成となっており、ポ
ンプ作用によシ水を循環する。また風呂往管１５より第
３電磁弁１３の上流側に接続されるバイパス路１７が配
設され、このバイパス路１７中には第４電磁弁１４を有
している。さらに、風呂回路２２の凍結防止運転の大切
を制御する凍結防止スイッチ１６および凍結防止スイッ
チ１６、電磁弁類６．８．１３．１４とポンプ１１とを
接続し、全体を制御する制御ユニット１Ｂを給湯器本体
１内に配している。Further, a hot water supply branch circuit 4 is provided downstream of the hot water supply heat exchanger 2, and a first electromagnetic valve 6 opens and closes the hot water supply branch circuit 4 to control water. The hot water supply branch circuit 4 is indirectly connected to a bath branch circuit 9 in which a hopper 7 and a second electromagnetic valve 8 are arranged, and this bath branch circuit 9 is connected to the upstream side of the pump 11 of the bath circuit 22, that is, the suction side. The bath circuit 22 is connected to the bath heat exchanger 10. A third solenoid valve 13 provided upstream of the connection with the bath branch circuit 9 via the bath outgoing pipe 15, the bath outlet 20, and the bath return pipe 19.
It is connected to the pump 11 through the pump 11, and further connected to the bath heat exchanger 10 on the downstream side of the pump 11, and the water is circulated by the pump action. Further, a bypass path 17 is provided which is connected to the upstream side of the third solenoid valve 13 from the bath outgoing pipe 15, and the fourth solenoid valve 14 is provided in this bypass path 17. Furthermore, a control unit 1B is provided which connects the anti-freeze switch 16 which controls the importance of anti-freeze operation of the bath circuit 22, the anti-freeze switch 16, the solenoid valves 6.8.13.14 and the pump 11, and controls the entire system. It is arranged inside the water heater main body 1.
制御ユニット１Ｂによシ、給湯運転時は常に第１電磁弁
６を閉じ蛇口を開くことによシ、給湯流水スイッチ３が
水の流れを検出してＯＮとなシ、給湯燃焼運転がなされ
、風呂運転時は、ポンプ１１の駆動によシ風呂流水スイ
ッチ１２が水の流れを検出してＯＮとな９風呂燃焼運転
がなされる。According to the control unit 1B, during the hot water supply operation, the first solenoid valve 6 is always closed and the faucet is opened, and the hot water supply running water switch 3 detects the flow of water and turns ON, and the hot water supply combustion operation is performed. During the bath operation, the bath water switch 12 detects the flow of water by driving the pump 11 and is turned ON to perform a nine-bath combustion operation.
この時、第１電磁弁６、第２電磁弁８、第４電磁弁１４
は閉、第３電磁弁１３は開となっている線制御する。凍
結防止運転時、即ち外気温が低下し凍結防止スイッチ１
６がＯＮの時は、制御ユニット１Ｂは第１電磁弁６を開
とし、給湯燃焼を開始する。また第２電磁弁８、第４電
磁弁１４を開、第３電磁弁１３を閉とし、かつポンプ１
１を駆動せしめ、ポンプ作用により給湯分岐回路４の温
水を風呂分岐回路９、風呂熱交換器１０、風呂往き管１
５、およびバイパス路１７、風呂戻シ管１９を経て浴そ
う２０に搬送する。この時、浴そう２ｏの排水栓２１は
開いていようが閉じていようがかまわない。給湯分岐回
路４の水の流入時による給湯燃焼運転および風呂回路２
２の温水通過による温度上昇によシ凍結防止スイッチ１
６は外気温度の上昇を検出し凍結防止運転停止レベル値
となると、凍結防止スイッチ１６はＯＦＦとなり、制御
ユニット１Ｂは第１電磁弁６、第２電磁弁８、第４ ？
ｌｉ磁弁１４を閉じ第３電磁弁１３を開き、かつポンプ
１１を停止する。この状態で外気温の低下により凍結防
止スイッチ１６が再びＯＮすると、前記の如く凍結防止
運転が繰り返される。かくして、風呂回路２２の凍結を
自動的に防止するものである。At this time, the first solenoid valve 6, the second solenoid valve 8, and the fourth solenoid valve 14
is closed and the third solenoid valve 13 is open. During antifreeze operation, that is, when the outside temperature drops, antifreeze switch 1 is activated.
6 is ON, the control unit 1B opens the first solenoid valve 6 and starts hot water supply combustion. Also, the second solenoid valve 8 and the fourth solenoid valve 14 are opened, the third solenoid valve 13 is closed, and the pump 1
1, and the hot water from the hot water supply branch circuit 4 is transferred to the bath branch circuit 9, the bath heat exchanger 10, and the bath pipe 1 by the pump action.
5, a bypass path 17, and a bath return pipe 19, and then transported to a bath tank 20. At this time, it does not matter whether the drain plug 21 of the bathtub 2o is open or closed. Hot water combustion operation and bath circuit 2 when water flows into the hot water supply branch circuit 4
Anti-freeze switch 1 due to temperature rise due to passage of hot water in step 2
6 detects a rise in the outside air temperature, and when the anti-freezing operation stop level value is reached, the anti-freezing switch 16 is turned OFF, and the control unit 1B is operated by the first solenoid valve 6, the second solenoid valve 8, and the fourth solenoid valve 8.
The li solenoid valve 14 is closed, the third solenoid valve 13 is opened, and the pump 11 is stopped. In this state, when the antifreeze switch 16 is turned on again due to a drop in the outside temperature, the antifreeze operation is repeated as described above. In this way, freezing of the bath circuit 22 is automatically prevented.
発明の効果
この様に本発明によれば、浴そうに常に一定水位以上の
水を張っておかなくても風呂回路の凍結防止ができると
ともに、入浴後浴そうの排水栓を抜き残り湯を捨てると
いう一般的な入浴債習にも適する点で大きな効果がある
。さらに、浴槽に浴槽水を張っておかなくてもよいので
残水により浴そう壁面が汚れるということもなく、また
次の入浴のための排水作業に手間がかかるということも
ない。Effects of the Invention As described above, according to the present invention, it is possible to prevent the bath circuit from freezing without having to constantly fill the bathtub with water above a certain water level, and also to remove the drain plug of the bathtub after taking a bath and discard the remaining hot water. It has a great effect in that it is suitable for general bathing lessons. Furthermore, since there is no need to fill the bathtub with bath water, there is no need for residual water to stain the bathing wall, and there is no need to spend time draining water for the next bath.
第１図は本発明の一実施例における強制追焚付給湯器の
構成図、第２図は従来例の構成図である。
４・・・・・・給湯分岐回路、５・・・・・・給湯回路
、６・・・・・・第１電磁弁、８・・・・・・第２電磁
弁、９・・・・・・風呂分岐回路、１１・・・・・・ポ
ンプ、１３・・・・・・第３電磁弁、１４・・・・・・
第４電磁弁、１６・・・・・・凍結防止スイッチ、１７
・・・・・・バイパス路、１Ｂ・・・・・・制御ユニッ
ト。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名４−
−一胎噂ケ岐回蛋１FIG. 1 is a block diagram of a forced reheating water heater according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional example. 4...Hot water supply branch circuit, 5...Hot water supply circuit, 6...First solenoid valve, 8...Second solenoid valve, 9... ... Bath branch circuit, 11 ... Pump, 13 ... Third solenoid valve, 14 ...
Fourth solenoid valve, 16... Antifreeze switch, 17
...Bypass path, 1B...Control unit. Name of agent: Patent attorney Toshio Nakao and 1 other person 4-
- Rumors about one pregnancy 1
Claims (1)
回路と、この給湯分岐回路に縁切りして接続し、かつ第
２電磁弁を有する風呂分岐回路と、この風呂分岐回路に
吸込側を接続した循環用のポンプ、このポンプの風呂分
岐回路との接続部より上流に位置する第３電磁弁、この
第３電磁弁とポンプと風呂熱交換器を接続した風呂往管
および風呂戻り管よりなる風呂回路と、風呂往管と風呂
戻り管の第３電磁弁の上流側との間を接続し、かつ第４
電磁弁を有するバイパス路と、前記風呂回路の凍結を防
止する凍結防止スイッチと、この凍結防止スイッチがＯ
Ｎの時、第１、第２、第４電磁弁を開き、第３電磁弁を
閉じ、ポンプを運転し、かつ第２電磁弁が開いている時
は、給湯運転により燃焼を開始せしめ、また凍結防止ス
イッチがＯＦＦの時、第１、第２、第４電磁弁を閉じ、
第３電磁弁を開き、ポンプの運転および給湯回路を動作
せしめる制御ユニットとを備えた強制追焚付給湯器の凍
結防止装置。A hot water supply branch circuit branching from the hot water supply circuit and having a first solenoid valve, a bath branch circuit connected to the hot water supply branch circuit in a disconnected manner and having a second solenoid valve, and a suction side connected to the bath branch circuit. a circulation pump, a third solenoid valve located upstream from the connection part of this pump with the bath branch circuit, and a bath outgoing pipe and a bath return pipe that connect the third solenoid valve, the pump, and the bath heat exchanger. Connecting the bath circuit and the upstream side of the third solenoid valve of the bath outgoing pipe and the bath return pipe, and the fourth solenoid valve.
A bypass path having a solenoid valve, an anti-freeze switch for preventing freezing of the bath circuit, and an anti-freeze switch that prevents the bath from freezing.
When N, the first, second, and fourth solenoid valves are opened, the third solenoid valve is closed, and the pump is operated, and when the second solenoid valve is open, combustion is started by hot water supply operation, and When the antifreeze switch is OFF, close the first, second, and fourth solenoid valves,
A freezing prevention device for a forced reheating water heater, comprising a control unit that opens a third solenoid valve to operate a pump and a hot water supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61313928A JPH0799280B2 (en) | 1986-12-24 | 1986-12-24 | Freezing prevention device for hot water heater with forced reheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61313928A JPH0799280B2 (en) | 1986-12-24 | 1986-12-24 | Freezing prevention device for hot water heater with forced reheating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63161350A true JPS63161350A (en) | 1988-07-05 |
| JPH0799280B2 JPH0799280B2 (en) | 1995-10-25 |
Family
ID=18047202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61313928A Expired - Lifetime JPH0799280B2 (en) | 1986-12-24 | 1986-12-24 | Freezing prevention device for hot water heater with forced reheating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0799280B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02103320A (en) * | 1988-10-13 | 1990-04-16 | Matsushita Electric Ind Co Ltd | Bath device |
| CN115183468A (en) * | 2022-07-27 | 2022-10-14 | 中山市恒乐电器有限公司 | Anti-freezing gas water heater |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5750028B2 (en) * | 2011-11-02 | 2015-07-15 | 株式会社コロナ | Freezing prevention control device for bath equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6120660A (en) * | 1984-07-09 | 1986-01-29 | Toshiba Ceramics Co Ltd | Upper nozzle of vessel for molten metal |
| JPS61213549A (en) * | 1985-03-20 | 1986-09-22 | Matsushita Electric Ind Co Ltd | Compulsory supplementary type bath furnace |
-
1986
- 1986-12-24 JP JP61313928A patent/JPH0799280B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6120660A (en) * | 1984-07-09 | 1986-01-29 | Toshiba Ceramics Co Ltd | Upper nozzle of vessel for molten metal |
| JPS61213549A (en) * | 1985-03-20 | 1986-09-22 | Matsushita Electric Ind Co Ltd | Compulsory supplementary type bath furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02103320A (en) * | 1988-10-13 | 1990-04-16 | Matsushita Electric Ind Co Ltd | Bath device |
| CN115183468A (en) * | 2022-07-27 | 2022-10-14 | 中山市恒乐电器有限公司 | Anti-freezing gas water heater |
| CN115183468B (en) * | 2022-07-27 | 2023-12-22 | 中山市恒乐电器有限公司 | Antifreezing gas water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0799280B2 (en) | 1995-10-25 |
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