JPH076695B2 - Water heater safety device - Google Patents
Water heater safety deviceInfo
- Publication number
- JPH076695B2 JPH076695B2 JP2320081A JP32008190A JPH076695B2 JP H076695 B2 JPH076695 B2 JP H076695B2 JP 2320081 A JP2320081 A JP 2320081A JP 32008190 A JP32008190 A JP 32008190A JP H076695 B2 JPH076695 B2 JP H076695B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- water heater
- output
- heat exchanger
- combustion
- 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 - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 44
- 238000002485 combustion reaction Methods 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 18
- 230000000694 effects Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Landscapes
- Control Of Combustion (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Description
【発明の詳細な説明】 ［利用分野及び発明の概要］ 本発明は、給湯器の安全装置、特に、熱交換器の損傷時
に給湯器の運転を停止するようにした安全装置に関する
ものであり、給湯器の熱交換器に初期的な損傷が生じた
場合に、これを速やかに且確実に検知して、給湯器の運
転を停止できるようにし、給湯器の安全性を向上させよ
うとするものである。TECHNICAL FIELD The present invention relates to a safety device for a water heater, and more particularly to a safety device for stopping the operation of the water heater when the heat exchanger is damaged. When the heat exchanger of the water heater has an initial damage, it can be detected promptly and surely to stop the operation of the water heater and improve the safety of the water heater. Is.
［従来技術及びその課題］ 給湯器の安全装置として、第４図に示す形式のものがあ
り、このものでは、給湯器のケーシング（Ｋ）内に収容
した熱交換器（１）の胴部に近接して温度ヒューズ（2
1）を配設し、この温度ヒューズ（21）の雰囲気温度が
設定温度になると、前記温度ヒューズ（21）によって給
湯器のガス回路に挿入した電磁弁式の元弁（31）への回
路が遮断されてこれが閉弁し、これにより給湯器の運転
を停止され、安全が確保されるようになっている。[Prior Art and its Problems] As a safety device for a water heater, there is a type shown in FIG. 4, in which the heat exchanger (1) is housed in a casing (K) of the water heater. Thermal fuse in close proximity (2
1) is installed, and when the ambient temperature of this temperature fuse (21) reaches the set temperature, the circuit to the solenoid valve type main valve (31) inserted in the gas circuit of the water heater by the temperature fuse (21) This shuts off and closes the valve, which shuts down the operation of the water heater to ensure safety.
ところが、この従来のものでは、熱交換器（１）の初期
的な損傷を検知できない場合がある。However, this conventional device may not be able to detect the initial damage of the heat exchanger (1).
熱交換器（１）が大きく損傷した場合には、熱交換器
（１）とケーシング（Ｋ）との間の雰囲気温度の上昇度
合も大きくなることから、温度ヒューズ（21）によって
も確実に熱交換器（１）の損傷を検知できる。ところ
が、熱交換器（１）の損傷初期において、この損傷が軽
微な場合には、熱交換器（１）内の熱気が外部には排出
されにくく、熱交換器（１）とケーシング（Ｋ）との間
の雰囲気温度が大きくは上昇しない。従って、かかる場
合には、前記温度ヒューズ（21）によっては熱交換器
（１）の軽微な損傷を検知できない事態も生じる。特
に、軽微な損傷であって前記部分の温度上昇が少いとき
には、夏期と冬期とにおける外気温の変化の度合の方が
大きい場合もあり、かかる場合には、熱交換器（１）の
損傷を確実に検知できない事態も生じ得る。When the heat exchanger (1) is greatly damaged, the temperature of the ambient temperature between the heat exchanger (1) and the casing (K) also increases, so that the thermal fuse (21) also ensures that the heat is removed. Damage to the exchanger (1) can be detected. However, at the initial stage of damage to the heat exchanger (1), if this damage is slight, the hot air in the heat exchanger (1) is difficult to be discharged to the outside, and the heat exchanger (1) and the casing (K) are not easily discharged. The atmosphere temperature between and does not rise significantly. Therefore, in such a case, a situation may occur in which the thermal fuse (21) cannot detect slight damage to the heat exchanger (1). In particular, when the damage is slight and the temperature rise in the part is small, the degree of change in the outside air temperature in the summer and winter may be larger. In such a case, damage to the heat exchanger (1) may occur. There may be a situation in which it cannot be reliably detected.
本発明は、かかる点に鑑みてなされたものであり、『熱
交換器（１）の外周の雰囲気温度を検知する検知手段
（２）を設け、この検知手段（２）の検知温度が出力装
置（３）の作動設定温度よりも高くなった時点で出力装
置（３）を作動させて、給湯器の運転を停止させるか又
は給湯器のガス回路を遮断させるようにした給湯器の安
全装置』において、外気温度の変化による影響を受ける
ことなく確実に検知できると共に、軽微な熱交換器
（１）の損傷をも確実に検知できるようにして、加え
て、センサーの数を増やすことなく、給湯器の安全性を
向上させることをその課題とする。The present invention has been made in view of the above point, and "provides a detection means (2) for detecting the ambient temperature of the outer periphery of the heat exchanger (1), and the detection temperature of the detection means (2) is the output device. A safety device for a water heater, which operates the output device (3) when the temperature becomes higher than the operation set temperature of (3) to stop the operation of the water heater or to cut off the gas circuit of the water heater ” In the above, it is possible to surely detect without being affected by the change of the outside air temperature and also to detect the slight damage of the heat exchanger (1), and in addition, without increasing the number of sensors, hot water supply is possible. The task is to improve the safety of vessels.
［技術的手段］ 上記課題を解決するために講じた本発明の技術的手段は
『燃焼装置非作動状態における検知手段（２）からの出
力を記憶する記憶手段（41）と、前記燃焼装置作動状態
における検知手段（２）からの出力値と前記記憶手段
（41）の記憶値との差が一定値以上となったときに出力
状態となる演算手段を設け、この演算手段からの出力に
よって出力装置（３）を作動させるようにした』ことで
ある。（第１図参照） ［作用］ 本発明の上記技術的手段は次のように作用する。[Technical Means] The technical means of the present invention taken to solve the above-mentioned problem is "a storage means (41) for storing the output from the detection means (2) in the non-operating state of the combustion apparatus, and the operation of the combustion apparatus". When the difference between the output value from the detection means (2) and the storage value of the storage means (41) in a state is equal to or more than a certain value, a calculation means is provided which is in an output state, and the output from the calculation means outputs. The device (3) was activated. ' (See FIG. 1) [Operation] The technical means of the present invention operates as follows.
燃焼装置作動状態における検知手段（２）からの出力値
と前記記憶手段（41）の記憶値との差が一定値以上にな
ると、このときに出力状態となる演算手段の出力によっ
て出力装置（３）が作動状態となり、給湯器の運転が停
止されるか又は給湯器のガス回路が遮断されることとな
る。この時の作動温度は、記憶手段（41）の記憶値、つ
まり、燃焼装置非作動状態における熱交換器（１）の温
度に相当する検知手段（２）の出力値との関係差によっ
て決定される。When the difference between the output value from the detection means (2) and the stored value of the storage means (41) in the operating state of the combustion device becomes a certain value or more, the output device (3 ) Is activated, the operation of the water heater is stopped or the gas circuit of the water heater is cut off. The operating temperature at this time is determined by the stored value of the storage means (41), that is, the difference in relation with the output value of the detection means (2) corresponding to the temperature of the heat exchanger (1) in the non-operating state of the combustion apparatus. It
従って、外気温又はこれに対応する温度が低い場合に
は、出力装置（３）の作動設定温度が低く設定され、逆
に外気温又はこれに対応する温度が高い場合には前記作
動設定温度が高く設定される。Therefore, when the outside air temperature or the temperature corresponding thereto is low, the operation set temperature of the output device (3) is set low, and conversely when the outside air temperature or the temperature corresponding thereto is high, the operation set temperature is Set high.
［効果］ 本発明は上記構成であるから次の特有の効果を有する。[Effects] The present invention having the above-described configuration has the following unique effects.
外気温変化又はこれに対応する温度変化に相応して出力
装置（３）の作動設定温度を決定するものであるから、
熱交換器（１）に損傷が生じた場合の前記温度変化度合
を小さく設定しても確実に出力装置（３）を作動させる
ことができ、安全装置の感度を向上させることができ、
熱交換器（１）の軽微な損傷も検知できる。つまり、熱
交換器（１）の損傷が確実に検知できる。Since the operation set temperature of the output device (3) is determined according to the change in the outside air temperature or the corresponding change in the temperature,
Even if the temperature change degree when the heat exchanger (1) is damaged is set to be small, the output device (3) can be reliably operated, and the sensitivity of the safety device can be improved.
Minor damage to the heat exchanger (1) can also be detected. That is, damage to the heat exchanger (1) can be reliably detected.
検知手段（２）とは別に外気温度検知手段を設けて、両
者の検知温度の差が一定値以上になった時に出力装置
（３）を動作させるようにしても同様の効果があるが、
この場合には、二つの温度検知手段が必要となる。これ
に対して、上記構成では、一つの検知手段（２）だけで
済むから、熱交換器（１）との関係で構成される温度検
知のための構成が簡素化できる。The same effect can be obtained by providing an outside air temperature detecting means separately from the detecting means (2) and operating the output device (3) when the difference between the detected temperatures of the both exceeds a certain value.
In this case, two temperature detecting means are required. On the other hand, in the above configuration, since only one detection means (2) is required, the configuration for temperature detection configured in relation to the heat exchanger (1) can be simplified.
尚、『燃焼装置をファンによって燃焼用空気を供給する
形式の燃焼装置とし、前記ファンは燃焼装置の燃焼に先
立って運転状態となる構成とし、このファン運転状態で
且燃焼装置の非燃焼状態に於ける検知手段（２）の出力
を記憶手段（41）によって記憶するようにした』もので
は、ファンによる給気状態での検知手段（２）の出力を
記憶するものとなるから、この記憶値に残留熱等の影響
がなく、ファンによって置換された給気雰囲気温度が記
憶値となるので、一層上記効果が確実なものとなる。In addition, "the combustion device is a combustion device of a type in which combustion air is supplied by a fan, and the fan is configured to be in an operating state prior to combustion of the combustion device, and in this fan operating state, the combustion device is in a non-combustion state. The output of the detecting means (2) is stored by the storing means (41). ”In this case, the output of the detecting means (2) in the air supply state by the fan is stored. Since there is no influence of residual heat and the like, and the temperature of the supply air atmosphere replaced by the fan becomes the stored value, the above effect is further secured.
［実施例］ 以下、本発明の実施例を第２図、第３図に基いて説明す
る。[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.
この実施例は、強制給排気式の燃焼装置を具備する給湯
器に実施したものであり、第２図に示すように、ケーシ
ング（Ｋ）内に収容される熱交換器（１）の下部にはガ
スバーナ（Ｂ）を収容するバーナ室（11）が連設され、
このバーナ室（11）の底部に強制給気用のファン（Ｆ）
が配設され、このファン（Ｆ）の吐出口は前記バーナ室
（11）内に開口し、吸引口（12）は、ケーシング（Ｋ）
と前記バーナ室（11）の底壁との間の空室内に開口す
る。そして、前記吸引口（12）には、検知手段（21）と
しての温度センサー（20）を臨ませてあり、前記吸引口
（12）には、熱交換器（１）とケーシング（Ｋ）との間
の空間に流入する外気等が強制吸引されることとなる。This embodiment was carried out on a water heater provided with a compulsory air supply / exhaust type combustion device, and as shown in FIG. 2, the heat exchanger (1) is housed in the casing (K) below the heat exchanger (1). Is connected to a burner chamber (11) that houses the gas burner (B).
A fan (F) for forced air supply at the bottom of the burner chamber (11)
Is provided, the discharge port of the fan (F) opens into the burner chamber (11), and the suction port (12) of the casing (K).
And a bottom wall of the burner chamber (11). A temperature sensor (20) as a detection means (21) is exposed to the suction port (12), and a heat exchanger (1) and a casing (K) are fitted to the suction port (12). The outside air and the like flowing into the space between them is forcibly sucked.
この実施例では、給湯動作前のプリパージ動作中にファ
ン（Ｆ）を運転状態とし、このとき温度センサー（20）
によって検知された検知温度を記憶しておき、この記憶
温度（T4）と給湯動作時の検知温度（T2）との差によっ
て熱交換器（１）の損傷を判定しようとするものであ
る。又、安全装置の制御はマイクロコンピュータによっ
て行われる。In this embodiment, the fan (F) is operated during the pre-purge operation before the hot water supply operation, and at this time, the temperature sensor (20)
The detection temperature detected by is stored, and the damage of the heat exchanger (1) is determined by the difference between the storage temperature (T 4 ) and the detection temperature (T 2 ) during hot water supply operation. . The control of the safety device is performed by a microcomputer.
以下、この場合のマイクロコンピュータの制御プログラ
ムを第３図に示すフローチャートに基いて説明する。The control program of the microcomputer in this case will be described below with reference to the flowchart shown in FIG.
運転スイッチが「オン」となると、温度センサー（20）
が温度検知状態となり、ついで、給湯動作を待機する状
態となる。そして、給湯動作信号が入力されると、先
ず、ファン（Ｆ）のみが一定時間運転されて、このとき
の検知温度（T2）の温度が記憶温度（T4）として記憶さ
れる。その後、給湯動作が開始されて、この給湯動作の
間に（検知温度（T2）−記憶温度（T4））と基準温度
（T0）とが比較され、前者が後者よりも低い場合には、
給湯動作が継続する。そして、給湯停止信号が入力され
ると、給湯が停止されてその後一定時間だけファン
（Ｆ）が運転を継続し、その後、運転スイッチがオフと
なっていない場合には、次の給湯動作を待機した状態に
置かれる。When the operation switch is turned on, the temperature sensor (20)
Is in a temperature detection state, and then is in a state of waiting for a hot water supply operation. When the hot water supply operation signal is input, first, only the fan (F) is operated for a certain period of time, and the temperature of the detected temperature (T 2 ) at this time is stored as the storage temperature (T 4 ). After that, the hot water supply operation is started, and during this hot water supply operation (detected temperature (T 2 ) -memorized temperature (T 4 )) is compared with the reference temperature (T 0 ), and if the former is lower than the latter, Is
The hot water supply operation continues. When the hot water supply stop signal is input, the hot water supply is stopped and the fan (F) continues to operate for a certain period of time after that. If the operation switch is not turned off after that, the next hot water supply operation is waited for. It is put in the state where it did.
熱交換器（１）の一部に損傷が生じている場合には、検
知温度（T2）が上昇することとなって、（検知温度
（T2）−記憶温度（T4））が基準温度（T0）よりも大き
くなり、この場合には、運転スイッチが「オフ」とな
り、給湯器の運転が停止される。If a part of the heat exchanger (1) is damaged, the detected temperature (T 2 ) will rise, and (detected temperature (T 2 ) -memory temperature (T 4 )) will be the standard. The temperature becomes higher than the temperature (T 0 ), and in this case, the operation switch is turned “off” and the operation of the water heater is stopped.
以上において、給湯動作とは、ファン（Ｆ）の運転によ
ってガスバーナ（Ｂ）に燃焼用空気が供給された状態で
このガスバーナ（Ｂ）が燃焼し且熱交換器（１）の給水
回路が開放されて、熱交換状態になることであり、熱交
換器（１）の給水回路が開放されたことと対応する給湯
動作信号の入力によってガスバーナ（Ｂ）に点火される
構成については公知のものをそのまま採用するので、こ
の点の詳細についての説明は省略する。In the above, the hot water supply operation means that the gas burner (B) burns while the combustion air is supplied to the gas burner (B) by the operation of the fan (F) and the water supply circuit of the heat exchanger (1) is opened. As a result, a heat exchange state is entered, and a known configuration is used as it is for the configuration in which the gas burner (B) is ignited by the input of the hot water supply operation signal corresponding to the opening of the water supply circuit of the heat exchanger (1). Since this is adopted, detailed description of this point will be omitted.
＊上記実施例の各部の変更について 以上の各実施例の要部において、次の変更が可能であ
る。* Regarding Changes to Each Part of the Above Embodiments The following changes can be made to the main parts of each of the above embodiments.
．クレーム１については給湯器をファン（Ｆ）を具備
しない構成とする変更 ．温度センサー（20）をファン（Ｆ）の吸引口以外の
箇所に設置する変更 熱交換器（１）を包囲する空間の温度を検知できるかぎ
り、温度センサー（20）を他の箇所に設置することも可
能であり、例えば、第２図において、熱交換器（１）の
胴部の後面に近傍に配設した、遮熱板に設置したり、ま
たは、熱交換器（１）の表面近傍に配設してもよい。な
お、ファン（Ｆ）を具備する器具の場合には、熱交換器
（１）の外周空間からファン（Ｆ）の入口部への空気吸
引経路内に配設すると一層感度が向上する。． Regarding claim 1, change the water heater to have no fan (F). Change that the temperature sensor (20) is installed in a place other than the suction port of the fan (F) As long as the temperature of the space surrounding the heat exchanger (1) can be detected, the temperature sensor (20) should be installed in another place. It is also possible, for example, to install it on a heat shield plate disposed near the rear surface of the body of the heat exchanger (1) in FIG. 2 or near the surface of the heat exchanger (1). You may arrange. In the case of a device including a fan (F), the sensitivity is further improved by disposing the device in the air suction path from the outer peripheral space of the heat exchanger (1) to the inlet of the fan (F).
．安全装置の出力動作として、器具の運転スイッチを
「オフ」にする構成以外に、第２図の元弁（31）を閉弁
させて燃焼装置のみを停止する方式や、熱電対回路に挿
入した安全弁の電気回路を遮断する方式等も採用でき
る。． As the output operation of the safety device, in addition to the configuration of turning off the operation switch of the appliance, the main valve (31) in Fig. 2 is closed to stop only the combustion device, or the safety device is inserted into the thermocouple circuit. A method of shutting off the electric circuit of the safety valve can also be adopted.
．マイクロコンピュータによる制御を他の電気回路に
よる制御に変更すること。． Changing control by a microcomputer to control by another electric circuit.
．その他構成各部を公知の構成に置換すること。． Other configuration Replace each part with a known configuration.
又、上記各実施例において、給湯動作信号としては、熱
交換器（１）の給水回路に挿入した水流スイッチからの
入力信号が採用でき、この信号は、給湯開始及び停止と
対応するものとなる。Further, in each of the above embodiments, as the hot water supply operation signal, the input signal from the water flow switch inserted in the water supply circuit of the heat exchanger (1) can be adopted, and this signal corresponds to the start and stop of hot water supply. .
第１図は本発明の原理説明図，第２図は本発明が採用さ
れる給湯器の概略説明図，第３図は要部のフローチャー
ト図，第４図は従来例の説明図であり、図中， （１）……熱交換器 （２）……検知手段 （３）……出力装置 （41）……記憶手段1 is an explanatory view of the principle of the present invention, FIG. 2 is a schematic explanatory view of a water heater to which the present invention is applied, FIG. 3 is a flow chart of essential parts, and FIG. 4 is an explanatory view of a conventional example, In the figure, (1) ... heat exchanger (2) ... detection means (3) ... output device (41) ... storage means
Claims (2)
する検知手段（２）を設け、この検知手段（２）により
熱交換器（１）の損傷時の温度を検知して、このときの
出力により出力装置（３）を作動させて、給湯器の運転
を停止させるか又は給湯器のガス回路を遮断させるよう
にした給湯器の安全装置において、燃焼装置非作動状態
における検知手段（２）からの出力を記憶する記憶手段
（41）と、前記燃焼装置作動状態における検知手段
（２）からの出力値と前記記憶手段（41）の記憶値との
差が一定値以上となったときに出力状態となる演算手段
を設け、この演算手段からの出力によって出力装置
（３）を作動させるようにした給湯器の安全装置。1. A detection means (2) for detecting the ambient temperature of the outer circumference of the heat exchanger (1) is provided, and the detection means (2) detects the temperature when the heat exchanger (1) is damaged, In the safety device of the water heater, the output device (3) is operated by the output at this time to stop the operation of the water heater or to cut off the gas circuit of the water heater. The storage means (41) for storing the output from (2) and the difference between the output value from the detection means (2) in the operating state of the combustion apparatus and the storage value of the storage means (41) are a certain value or more. A safety device for a water heater, which is provided with a calculation means that is in an output state when the output device (3) is activated by the output from the calculation means.
給する形式の燃焼装置とし、前記ファンは燃焼装置の燃
焼に先立って運転状態となる構成とし、このファン運転
状態で且燃焼装置の非燃焼状態に於ける検知手段（２）
の出力を記憶手段（41）によって記憶するようにした請
求項１に記載の給湯器の安全装置。2. The combustion device is a combustion device of a type in which combustion air is supplied by a fan, and the fan is set to an operating state prior to combustion of the combustion device. In this fan operating state, non-combustion of the combustion device is performed. Detection means in the state (2)
The safety device for a water heater according to claim 1, wherein the output of the water heater is stored by the storage means (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2320081A JPH076695B2 (en) | 1990-11-22 | 1990-11-22 | Water heater safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2320081A JPH076695B2 (en) | 1990-11-22 | 1990-11-22 | Water heater safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04190043A JPH04190043A (en) | 1992-07-08 |
| JPH076695B2 true JPH076695B2 (en) | 1995-01-30 |
Family
ID=18117510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2320081A Expired - Fee Related JPH076695B2 (en) | 1990-11-22 | 1990-11-22 | Water heater safety device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH076695B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5714121A (en) * | 1980-07-01 | 1982-01-25 | Mitsubishi Electric Corp | Oxygen density detecting apparatus for burner |
| JPS628543U (en) * | 1985-07-01 | 1987-01-19 | ||
| JP2629305B2 (en) * | 1988-09-30 | 1997-07-09 | 松下電器産業株式会社 | Safety device for combustion equipment |
-
1990
- 1990-11-22 JP JP2320081A patent/JPH076695B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04190043A (en) | 1992-07-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |