JPH06265208A - Freezing preventing device for hot water feeder - Google Patents
Freezing preventing device for hot water feederInfo
- Publication number
- JPH06265208A JPH06265208A JP5051187A JP5118793A JPH06265208A JP H06265208 A JPH06265208 A JP H06265208A JP 5051187 A JP5051187 A JP 5051187A JP 5118793 A JP5118793 A JP 5118793A JP H06265208 A JPH06265208 A JP H06265208A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- water
- heater
- water passage
- detected
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 147
- 238000007710 freezing Methods 0.000 title claims description 8
- 230000008014 freezing Effects 0.000 title description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- PSFDQSOCUJVVGF-UHFFFAOYSA-N Harman Natural products C12=CC=CC=C2NC2=C1C=CN=C2C PSFDQSOCUJVVGF-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、給湯器の通水路部の温
度を検出する温度検出手段と、前記通水路部を加熱する
ヒータと、前記温度検出手段の検出温度に基づいて、前
記ヒータの作動を制御する制御手段とが設けられている
給湯器の凍結防止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature detecting means for detecting the temperature of a water passage portion of a water heater, a heater for heating the water passage portion, and the heater based on the temperature detected by the temperature detecting means. And a control means for controlling the operation of the water heater.
【０００２】[0002]
【従来の技術】従来の給湯器では、通水路部を凍結から
守るため、通水路部にバイメタルやサーミスタ等の温度
検出手段と通水路部を加熱する複数のヒータとを設け、
温度検出手段の検出温度が凍結温度前になると、全ての
ヒータを作動させるようにしていた。例えば、本出願人
が既に提案した特開昭６４−１２１９６号公報において
は、複数のヒータを通水路部に分散配置して設け、温度
検出手段を給水用の通水路部に設けて、給水用の通水路
部が例えば３℃以下になると、複数のヒータを全て通電
させていた。2. Description of the Related Art In a conventional water heater, in order to protect the water passage from freezing, the water passage is provided with temperature detecting means such as a bimetal or thermistor and a plurality of heaters for heating the water passage.
When the temperature detected by the temperature detecting means is before the freezing temperature, all the heaters are operated. For example, in Japanese Patent Application Laid-Open No. 64-12196 proposed by the present applicant, a plurality of heaters are provided dispersedly in the water passage portion, and the temperature detecting means is provided in the water passage portion for water supply. When, for example, the temperature of the water passage was below 3 ° C., all the heaters were energized.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、給湯器
の通水路部の温度分布は、給湯器の設置状態により、大
きく異なる。つまり、例えば、給湯器本体が屋内に設置
され、給水用の通水路部に接続されている給水用の外部
配管が屋外に付設されているような場合には、給水用の
通水路部は、その他の通水路部に比べ温度が低くなり、
又、給湯器本体が屋外に設置され、給湯用の通水路部に
接続されている給湯用の外部配管が屋内に付設されてい
るような場合には、給湯用の通水路部は、その他の通水
路部に比べ温度は高くなる。However, the temperature distribution in the water passage of the water heater differs greatly depending on the installed state of the water heater. That is, for example, when the water heater main body is installed indoors and the external pipe for water supply connected to the water passage part for water supply is attached outdoors, the water passage part for water supply is The temperature will be lower than other water passages,
In addition, when the water heater body is installed outdoors and the external pipe for hot water supply connected to the hot water supply water passage part is attached indoors, the hot water supply water passage part is The temperature is higher than that of the water passage.
【０００４】このため、温度検出手段を設けた部分の通
水路部の温度とその他の部分の通水路部の温度に温度差
が生じてしまい、その結果、従来の如く、一つの温度検
出手段の検出温度に基づいて、全てのヒータを同一に作
動させるようにすると、加熱しすぎの通水路部又は加熱
不十分の通水路部ができてしまうこととなり、適切に又
効率よく通水路部を加熱することができない、という問
題があった。本発明は上記の実情に鑑みてなされたもの
であって、その目的は、給湯器の設置状態にかかわら
ず、適切に且つ効率よく通水路部を加熱することのでき
る給湯器の凍結防止装置を提供することにある。Therefore, a temperature difference occurs between the temperature of the water passage portion of the portion where the temperature detecting means is provided and the temperature of the water passage portion of the other portion, and as a result, as in the conventional case, one temperature detecting means is used. If all the heaters are operated in the same way based on the detected temperature, a water passage part that is overheated or a water passage part that is insufficiently heated will be created, and the water passage part will be heated appropriately and efficiently. There was a problem that I could not do it. The present invention has been made in view of the above situation, and an object thereof is to provide an antifreezing device for a water heater that can appropriately and efficiently heat a water passage regardless of the installation state of the water heater. To provide.
【０００５】[0005]
【課題を解決するための手段】本発明の給湯器の凍結防
止装置は、給湯器の通水路部の温度を検出する温度検出
手段と、前記通水路部を加熱するヒータと、前記温度検
出手段の検出温度に基づいて、前記ヒータの作動を制御
する制御手段とが設けられているものであって、その第
１特徴構成は、前記温度検出手段が、前記通水路部の複
数箇所に設けられ、前記ヒータが、前記温度検出手段の
近傍に複数箇所設けられ、前記制御手段が、複数の前記
温度検出手段の何れかにて所定温度以下の温度が検出さ
れるに伴って、その所定温度以下の温度を検出した前記
温度検出手段の近傍に設けられた前記ヒータを作動させ
るように構成されている点にある。第２特徴構成は、前
記温度検出手段及び前記ヒータが、給水用の通水路部、
前記給湯器の水加熱用熱交換器の出口の通水路部、及
び、給湯用の通水路部に、夫々設けられている点にあ
る。A freezing prevention device for a water heater according to the present invention comprises a temperature detecting means for detecting the temperature of a water passage of the water heater, a heater for heating the water passage, and a temperature detecting means. And a control means for controlling the operation of the heater based on the detected temperature of the heater. The first characteristic configuration is that the temperature detecting means is provided at a plurality of positions of the water passage portion. , The heater is provided at a plurality of locations in the vicinity of the temperature detection means, and the control means detects a temperature equal to or lower than a predetermined temperature by any one of the plurality of temperature detection means, and the temperature is equal to or lower than the predetermined temperature. It is configured to operate the heater provided near the temperature detecting means that detects the temperature. A second characteristic configuration is that the temperature detecting means and the heater are water passages for water supply,
It is provided in the water passage portion at the outlet of the water heating heat exchanger of the water heater and the water passage portion for hot water supply, respectively.
【０００６】[0006]
【作用】本発明の第１特徴構成によれば、複数の温度検
出手段の何れかが所定の温度（例えば３℃）以下になる
と、その所定の温度以下の温度を検出した温度検出手段
の近傍に設けられたヒータのみが作動して、その所定の
温度以下の温度を検出した温度検出手段の近傍の通水路
部が加熱される。尚、そのとき、その他のヒータは作動
しないこととなる。つまり、設定温度以下になった通水
路部のみを加熱することができるのである。第２特徴構
成によれば、前記温度検出手段及び前記ヒータが、給水
用の通水路部、給湯器の水加熱用熱交換器の出口の通水
路部、及び、給湯用の通水路部に、夫々設けられている
ので、給水用の通水路部、給湯器の水加熱用熱交換器の
出口の通水路部、及び、給湯用の通水路部夫々を各別に
加熱することができる。According to the first characteristic construction of the present invention, when any of the plurality of temperature detecting means becomes lower than a predetermined temperature (for example, 3 ° C.), the vicinity of the temperature detecting means detecting the temperature lower than the predetermined temperature is reached. Only the heater provided in the unit operates to heat the water passage section in the vicinity of the temperature detecting unit that detects a temperature equal to or lower than the predetermined temperature. At that time, the other heaters do not operate. That is, it is possible to heat only the water passage portion that has become equal to or lower than the set temperature. According to the second characteristic configuration, the temperature detecting means and the heater are provided in the water supply passage part for water supply, the water passage part at the outlet of the water heating heat exchanger of the water heater, and the water supply passage part for hot water supply, Since each of them is provided, it is possible to separately heat the water supply passage part for water supply, the water passage part at the outlet of the water heating heat exchanger of the water heater, and the water supply passage part for hot water supply.
【０００７】[0007]
【発明の効果】上記第１特徴構成によれば、設定温度以
下になった通水路部のみを加熱することができるので、
給湯器の設置状態にかかわらず、適切に且つ効率よく通
水路部を加熱することのできる給湯器の凍結防止装置を
提供することができるに至った。第２特徴構成によれ
ば、給水用の通水路部、給湯器の水加熱用熱交換器の出
口の通水路部、及び、給湯用の通水路部夫々における凍
結を各別に回避することができるので、一層適切な凍結
防止を行うことができるに至った。According to the above-mentioned first characteristic structure, only the water passage portion having a temperature below the set temperature can be heated.
It has become possible to provide an antifreezing device for a water heater that can appropriately and efficiently heat the water passage portion regardless of the installed state of the water heater. According to the second characteristic configuration, it is possible to separately avoid freezing in the water supply passage portion, the water passage portion at the outlet of the water heating heat exchanger of the water heater, and the hot water supply passage portion. Therefore, more appropriate freeze prevention can be performed.
【０００８】[0008]
【実施例】本発明の実施例を図面に基づいて説明する。
図１及び図２に示すように、給湯器Ａは、装置ケーシン
グ１に、水加熱用の熱交換器２、ガスバーナ３、コント
ローラ４、及び、通水路５を内装し、通水路５は、外部
配管６を介して給湯栓７に接続するようにしてある。
尚、この通水路５は、給水用の通水路部５ａと、熱交換
器２の出口の通水路部５ｂと、給湯用の通水路部５ｃと
より構成されている。Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the water heater A has a heat exchanger 2 for heating water, a gas burner 3, a controller 4, and a water passage 5 inside a device casing 1, and the water passage 5 is an outside. It is arranged to be connected to the hot water tap 7 through the pipe 6.
The water passage 5 is composed of a water passage portion 5a for supplying water, a water passage portion 5b at the outlet of the heat exchanger 2, and a water passage portion 5c for supplying hot water.
【０００９】給水用の通水路部５ａには、水量センサー
８及び入水温度センサー９が付設され、熱交換器２の出
口の通水路部５ｂには、熱交換器出口温度温度センサー
１１が付設され、給湯用の通水路部５ｃには、給水路部
５ａからの水を混合させる混合弁１２及び給湯温度セン
サー１３が付設され、又、ガスバーナ３に対する燃料ガ
ス供給管路１４には、電磁ガス弁１５及び燃料供給量調
整弁１６が介装されている。従って、温度センサー９，
１１，１３は、各通水路部５ａ，５ｂ，５ｃ夫々の温度
を検出する温度検出手段Ｔとして機能する。A water quantity sensor 8 and an incoming water temperature sensor 9 are attached to the water passage 5a for water supply, and a heat exchanger outlet temperature temperature sensor 11 is attached to the water passage 5b at the outlet of the heat exchanger 2. The hot water supply passage 5c is provided with a mixing valve 12 for mixing water from the water supply passage 5a and a hot water supply temperature sensor 13, and a fuel gas supply pipe 14 for the gas burner 3 is provided with an electromagnetic gas valve. 15 and a fuel supply amount adjusting valve 16 are provided. Therefore, the temperature sensor 9,
Reference numerals 11 and 13 function as temperature detection means T for detecting the temperature of each water passage portion 5a, 5b, 5c.
【００１０】給湯運転はコントローラ４により制御さ
れ、給湯栓７が開栓されて通水が開始されると、それに
伴う水量センサー８による水量検知に基づき、ファアン
２１が駆動され、電磁ガス弁１５が開弁されると共に点
火プラグ２２が作動してガスバーナ３が自動着火し、そ
れによって給湯が開始される。又、水量センサー８によ
る検出水量と入水温度センサー９による検出入水温度と
に基づき、設定温度の湯を得るために要する燃料供給量
が算出されて、ガスバーナ３に対する燃料供給量をその
算出供給量とするように燃料供給量調整弁１６が自動調
整され、加えて、給湯温度センサー１３による検出給湯
温度を前記の設定温度に維持するように混合弁１２が自
動微調整される。The hot water supply operation is controlled by the controller 4, and when the hot water supply tap 7 is opened and water flow is started, the fan 21 is driven based on the water amount detection by the water amount sensor 8 accompanying it, and the electromagnetic gas valve 15 is turned on. When the valve is opened and the spark plug 22 is activated, the gas burner 3 is automatically ignited, whereby hot water supply is started. Further, the fuel supply amount required to obtain the hot water at the set temperature is calculated based on the water amount detected by the water amount sensor 8 and the water inlet temperature detected by the water inlet temperature sensor 9, and the fuel supply amount for the gas burner 3 is set as the calculated supply amount. The fuel supply amount adjusting valve 16 is automatically adjusted so that the mixing valve 12 is automatically finely adjusted so that the hot water supply temperature detected by the hot water supply temperature sensor 13 is maintained at the set temperature.
【００１１】一方、この給湯器Ａには、各通水路部５
ａ，５ｂ，５ｃでの水の凍結を防止するため、複数のヒ
ータＨが、各通水路部５ａ，５ｂ，５ｃ夫々に設けられ
た温度センサー９，１１，１３の近傍に、適宜分散配置
して設けられている。つまり、図１及び図２に示すよう
に、通水路部５ａには、通水路部５ａを加熱するヒータ
Ｈとしてのヒータ１７ａ，１７ｂが、通水路部５ｂに
は、通水路部５ｂを加熱するヒータＨとしてのヒータ１
８ａ，１８ｂ，１８ｃが、通水路部５ｃには、通水路部
５ｃを加熱するヒータＨとしてのヒータ１９ａ，１９ｂ
が、夫々付設されている。尚、ヒータＨの具体的付設構
成としては、図５に示すように、ヒータＨ本体を通水路
５の管の外周面に当て付けた状態で締結具２３により取
り付けている。又、ヒータＨは、通水路部が−２０℃に
なるような状態でも、通水路部を凍結から守るに十分な
発熱量を有している。On the other hand, the water heater A has each water passage 5
In order to prevent freezing of water at a, 5b, 5c, a plurality of heaters H are appropriately arranged in the vicinity of the temperature sensors 9, 11, 13 provided in the respective water passage portions 5a, 5b, 5c. Is provided. That is, as shown in FIGS. 1 and 2, the water passage 5a is heated by the heaters 17a and 17b as the heaters H for heating the water passage 5a, and the water passage 5b is heated by the water passage 5b. Heater 1 as heater H
8a, 18b, 18c are heaters 19a, 19b as heaters H for heating the water passage 5c in the water passage 5c.
But each is attached. As a specific attachment structure of the heater H, as shown in FIG. 5, the heater H main body is attached to the outer peripheral surface of the pipe of the water passage 5 by the fastener 23. Further, the heater H has a sufficient amount of heat generation to protect the water passage portion from freezing even in a state where the water passage portion is -20 ° C.
【００１２】更に、コントローラ４は、温度センサー
９，１１，１３の何れかにて所定温度以下の温度が検出
されるに伴って、その所定温度以下の温度を検出した温
度センサーの近傍に設けられたヒータＨを作動させるよ
うに構成されている。つまり、図３に示すように、温度
センサー９の検出温度ＴS に基づいて、ヒータ１７ａ，
１７ｂの作動を制御し、温度センサー１１の検出温度Ｔ
S に基づいて、ヒータ１８ａ，１８ｂ，１８ｃの作動を
制御し、温度センサー１３の検出温度ＴS に基づいて、
ヒータ１９ａ，１９ｂの作動を制御する。従って、コン
トローラ４は、ヒータＨの作動を制御する制御手段とし
て機能する。尚、コントローラ４は、図４のフローチャ
ートに示すように、検出温度ＴS が、３℃以下になる
と、ヒータＨへの通電（一定電流）を開始し、検出温度
ＴS が１０℃以上になると、通電を停止するように構成
されており、この制御を随時繰り返し実行する。Further, the controller 4 is provided in the vicinity of the temperature sensor that detects a temperature lower than or equal to a predetermined temperature as one of the temperature sensors 9, 11 and 13 detects a temperature lower than or equal to the predetermined temperature. The heater H is operated. That is, as shown in FIG. 3, based on the temperature T S detected by the temperature sensor 9, the heaters 17a,
The temperature T detected by the temperature sensor 11 is controlled by controlling the operation of 17b.
Based on S , the operation of the heaters 18a, 18b, 18c is controlled, and based on the temperature T S detected by the temperature sensor 13,
It controls the operation of the heaters 19a and 19b. Therefore, the controller 4 functions as control means for controlling the operation of the heater H. As shown in the flowchart of FIG. 4, the controller 4 starts energization (constant current) to the heater H when the detected temperature T S becomes 3 ° C. or lower, and when the detected temperature T S becomes 10 ° C. or higher. , Is configured to stop energization, and this control is repeatedly executed at any time.
【００１３】〔別実施例〕 上記実施例では、通水路部の温度を検出する温度セ
ンサー９，１１，１３は、バイメタル及びサーミスタ等
種々のものが利用でき、温度センサー９，１１，１３に
て、通水路部の管の温度を測定するようにしても良い
し、通水路部の水温を測定するようにしても良い。 温度センサー及びヒータＨの数と設置位置、及び、
ヒータＨの構造等は、上記実施例に限定されるものでは
なく、各種変更することができる。 上記実施例では、温度センサーの検出温度ＴS が３
℃以下になると、その温度センサーの近傍に設けられた
複数個のヒータＨ夫々に一定の電流を通電しているが、
検出温度ＴS が低いほど大電流を流すようにしても良い
し、検出温度ＴSが低いほど通電するヒータの数が多く
なるように（つまり、例えば、温度センサ１１の検出温
度ＴS が３℃以下になるとヒータ１８ａを通電し、検出
温度ＴS が−５℃以下になるとヒータ１８ａとヒータ１
８ｂを通電し、検出温度ＴS が−１０℃以下になるとヒ
ータ１８ａとヒータ１８ｂとヒータ１８ｃを通電するよ
うに）しても良い。[Other Embodiments] In the above embodiment, various sensors such as bimetal and thermistor can be used as the temperature sensors 9, 11 and 13 for detecting the temperature of the water passage portion. The temperature of the pipe of the water passage portion may be measured, or the water temperature of the water passage portion may be measured. Number of temperature sensors and heaters H, installation positions, and
The structure and the like of the heater H are not limited to those in the above embodiment, but various modifications can be made. In the above embodiment, the detected temperature T S of the temperature sensor is 3
When the temperature becomes lower than ℃, a constant current is applied to each of the plurality of heaters H provided near the temperature sensor.
It detects the temperature T S may be made to flow to lower the large current, the detected temperature T S as will many number of heaters to be energized as low (that is, for example, the detected temperature T S of the temperature sensor 11 is 3 When the temperature falls below ℃, the heater 18a is energized, and when the detected temperature T S falls below -5 ° C, the heater 18a and the heater 1
8b is energized, the detected temperature T S may be so) to energize the heater 18a and the heater 18b and the heater 18c becomes to -10 ° C. or less.
【００１４】尚、特許請求の範囲の項に図面との対照を
便利にする為に符号を記すが、該記入により本発明は添
付図面の構造に限定されるものではない。It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.
【図１】給湯器の全体構成図1] Overall configuration of a water heater
【図２】給湯器の平面図FIG. 2 is a plan view of a water heater.
【図３】制御作動のブロック図FIG. 3 is a block diagram of control operation.
【図４】制御作動のフローチャートFIG. 4 is a flowchart of control operation.
【図５】ヒータの取り付け構造を示す斜視図FIG. 5 is a perspective view showing a heater mounting structure.
Ａ 給湯器 Ｈ ヒータ Ｔ 温度検出手段 ２ 熱交換器 ４ 制御手段 A water heater H heater T temperature detection means 2 heat exchanger 4 control means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉岡 正幸 大阪府大阪市港区南市岡１丁目１番52号 株式会社ハーマン内 (72)発明者 佐野 真 大阪府大阪市港区南市岡１丁目１番52号 株式会社ハーマン内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Masayuki Yoshioka 1-1-52 Minami-shi Oka, Minato-ku, Osaka-shi, Osaka 1-52 Harman Co., Ltd. (72) Makoto Sano 1-1-52 Oka Minami-shi, Minato-ku, Osaka, Osaka Issue Harman Co., Ltd.
Claims (2)
る温度検出手段（Ｔ）と、前記通水路部を加熱するヒー
タ（Ｈ）と、前記温度検出手段（Ｔ）の検出温度に基づ
いて、前記ヒータ（Ｈ）の作動を制御する制御手段
（４）とが設けられている給湯器の凍結防止装置であっ
て、 前記温度検出手段（Ｔ）が、前記通水路部の複数箇所に
設けられ、前記ヒータ（Ｈ）が、前記温度検出手段
（Ｔ）の近傍に複数箇所設けられ、 前記制御手段（４）は、複数の前記温度検出手段（Ｔ）
の何れかにて所定温度以下の温度が検出されるに伴っ
て、その所定温度以下の温度を検出した前記温度検出手
段（Ｔ）の近傍に設けられた前記ヒータ（Ｈ）を作動さ
せるように構成されている給湯器の凍結防止装置。1. A temperature detecting means (T) for detecting a temperature of a water passage portion of a water heater (A), a heater (H) for heating the water passage portion, and a temperature detected by the temperature detecting means (T). And a control means (4) for controlling the operation of the heater (H) based on the above, wherein the temperature detecting means (T) is a plurality of water passage sections. The heater (H) is provided at a plurality of locations in the vicinity of the temperature detecting means (T), and the control means (4) is provided at a plurality of the temperature detecting means (T).
When a temperature lower than or equal to the predetermined temperature is detected by any of the above, the heater (H) provided in the vicinity of the temperature detecting means (T) detecting the temperature lower than or equal to the predetermined temperature is operated. Anti-freezing device for the water heater that is configured.
（Ｈ）が、給水用の通水路部、前記給湯器（Ａ）の水加
熱用熱交換器（２）の出口の通水路部、及び、給湯用の
通水路部に、夫々設けられている請求項１記載の給湯器
の凍結防止装置。2. The temperature detecting means (T) and the heater (H) are a water supply passage part, a water passage part at an outlet of a water heating heat exchanger (2) of the water heater (A), The antifreezing device for a water heater according to claim 1, which is provided in each of the hot water supply passages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5051187A JPH06265208A (en) | 1993-03-12 | 1993-03-12 | Freezing preventing device for hot water feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5051187A JPH06265208A (en) | 1993-03-12 | 1993-03-12 | Freezing preventing device for hot water feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06265208A true JPH06265208A (en) | 1994-09-20 |
Family
ID=12879870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5051187A Pending JPH06265208A (en) | 1993-03-12 | 1993-03-12 | Freezing preventing device for hot water feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06265208A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10213346A (en) * | 1997-01-29 | 1998-08-11 | Harman Co Ltd | Hot water supply device with freezing preventive function |
| JP2011021770A (en) * | 2009-07-13 | 2011-02-03 | Paloma Industries Ltd | Water heater |
| JP2012189250A (en) * | 2011-03-10 | 2012-10-04 | Corona Corp | Heat pump type hot-water heating device |
| CN113819657A (en) * | 2021-09-06 | 2021-12-21 | 马鞍山亿科金属制品有限公司 | Anti-freezing control method for pipeline of gas water heater |
-
1993
- 1993-03-12 JP JP5051187A patent/JPH06265208A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10213346A (en) * | 1997-01-29 | 1998-08-11 | Harman Co Ltd | Hot water supply device with freezing preventive function |
| JP2011021770A (en) * | 2009-07-13 | 2011-02-03 | Paloma Industries Ltd | Water heater |
| JP2012189250A (en) * | 2011-03-10 | 2012-10-04 | Corona Corp | Heat pump type hot-water heating device |
| CN113819657A (en) * | 2021-09-06 | 2021-12-21 | 马鞍山亿科金属制品有限公司 | Anti-freezing control method for pipeline of gas water heater |
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