JPH02217714A - Combustion controller of hot water feeder - Google Patents
Combustion controller of hot water feederInfo
- Publication number
- JPH02217714A JPH02217714A JP1038954A JP3895489A JPH02217714A JP H02217714 A JPH02217714 A JP H02217714A JP 1038954 A JP1038954 A JP 1038954A JP 3895489 A JP3895489 A JP 3895489A JP H02217714 A JPH02217714 A JP H02217714A
- Authority
- JP
- Japan
- Prior art keywords
- burner
- safety valve
- coil
- electromotive force
- electromagnetic safety
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 35
- 239000003990 capacitor Substances 0.000 abstract description 8
- 230000020169 heat generation Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 15
- 238000001514 detection method Methods 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 235000007516 Chrysanthemum Nutrition 0.000 description 1
- 244000189548 Chrysanthemum x morifolium Species 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は湯沸器、風呂釜、給湯暖房器その他の給湯器の
燃焼制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a combustion control device for water heaters, bathtubs, hot water heaters, and other water heaters.
（従来の技術）
従来のこの種装置として、バーナへのガス供給路に、電
磁安全弁と該バーナで加熱される熱交換器への通水によ
り開弁する水圧応動弁とを介設すると共に、該バーナに
臨ませた熱発電素子を該電磁安全弁のコイルに接続し、
点火操作に連動して開弁した該電磁安全弁を、該熱発電
素子から発生される所定起電力で開弁状態に保持して該
バーナの燃焼を継続させるようにしたものは知られる。(Prior Art) As a conventional device of this type, an electromagnetic safety valve and a hydraulically responsive valve that opens when water passes through a heat exchanger heated by the burner are interposed in the gas supply path to the burner, and Connecting the thermoelectric generating element facing the burner to the coil of the electromagnetic safety valve,
It is known that the electromagnetic safety valve, which opens in conjunction with the ignition operation, is held open by a predetermined electromotive force generated from the thermoelectric generating element to continue combustion in the burner.
（発明が解決しようとする課題）
しかしながら、一般にバーナの燃焼停止直後は残った熱
で熱発電素子が加熱され、所定起電力を発生し続けるた
め、上記従来装置によれば、この所定起電力により電磁
安全弁が開弁状態に保持され続けてしまい、したがって
バーナの燃焼停止直後に水だけ使用すると、水圧応動弁
が開弁することから、生ガスが放出される不都合を生じ
る。(Problem to be Solved by the Invention) However, in general, immediately after the burner stops burning, the thermoelectric element is heated by the remaining heat and continues to generate a predetermined electromotive force. If the electromagnetic safety valve continues to be kept open, and therefore only water is used immediately after the burner stops burning, the hydraulically responsive valve will open, resulting in the inconvenience of releasing raw gas.
（課題を解決するための手段）
本発明は上記不都合を解消する装置を提供しようとする
ものであって、バーナへのガス供給路に、電磁安全弁と
該バーナで加熱される熱交換器への通水により開弁する
水圧応動弁とを介設すると共に、該バーナに臨ませた熱
発電素子を該電磁安全弁のコイルに接続し、点火操作に
連動して開弁した該電磁安全弁を、該熱発電素子から発
生される所定起電力で開弁状態に保持して該バーナの燃
焼を継続させるようにしたものにおいて、該電磁安全弁
のコイルに、該バーナの燃焼停止から該熱発電素子の起
電力が所定起電力未満になるまでの間、逆電流を流す逆
電流発生手段を設けたことを特徴とする。(Means for Solving the Problems) The present invention seeks to provide a device that eliminates the above-mentioned disadvantages, and includes an electromagnetic safety valve and a heat exchanger heated by the burner in the gas supply path to the burner. A hydraulic response valve that opens when water flows is provided, and a thermoelectric generator facing the burner is connected to the coil of the electromagnetic safety valve, and the electromagnetic safety valve opens in conjunction with the ignition operation. In a valve that is kept open by a predetermined electromotive force generated from a thermoelectric generating element to continue combustion of the burner, the coil of the electromagnetic safety valve is connected to the coil of the electromagnetic safety valve from when combustion of the burner stops to when the thermoelectric generating element starts. The present invention is characterized in that a reverse current generating means is provided for flowing a reverse current until the electric power becomes less than a predetermined electromotive force.
（作 用）
本発明は上記構成によるもので、これによれば、バーナ
の点火操作と熱交換器の通水操作とを行なうと、電磁安
全弁と水圧応動弁とが開弁されてバーナにガスが供給さ
れると共に、点火回路が作動してバーナが着火される。(Function) The present invention has the above configuration, and according to this, when the burner ignition operation and the water flow operation of the heat exchanger are performed, the electromagnetic safety valve and the hydraulic response valve are opened and gas is supplied to the burner. is supplied, and the ignition circuit is activated to ignite the burner.
そしてバーナがち着火されれば、熱発電素子から所定起
電力が発生され、この所定起電力により電磁安全弁が開
弁状態に保持されてバーナの燃焼が継続され、このバー
ナの燃焼により熱交換器が加熱されて、熱交換器から湯
が得られる。When the burner is ignited, a predetermined electromotive force is generated from the thermoelectric generator, and this predetermined electromotive force keeps the electromagnetic safety valve open to continue burning the burner. It is heated and hot water is obtained from the heat exchanger.
その後、バーナの消火操作と熱交換器の通水停止操作と
を行なうと、点火回路が不作動になると共に、水圧応動
弁が閉弁されてバーナの燃焼が停止される。このバーナ
の燃焼停止直後は残った熱により熱発電素子が加熱され
、所定起電力を発生し続けているため、この所定起電力
のみによりコイルへ電流を流す従来のものでは、電磁安
全弁の開弁保持状態が続き、このとき水のみを使用する
ため再び熱交換器の通水操作を行なうと水圧応動弁が開
くので、生ガスが放出されてしまうが、本発明では、バ
ーナの燃焼停止直後に逆電流発生手段によりコイルへ逆
方向の電流を流してコイルに流れる正方向の電流を保持
電流以下に１−で電磁安全弁を閉弁させることができる
ので、生ガスが放出されることがない。Thereafter, when the burner is extinguished and the water flow to the heat exchanger is stopped, the ignition circuit is deactivated, the hydraulically responsive valve is closed, and combustion of the burner is stopped. Immediately after the burner stops burning, the thermoelectric generator is heated by the remaining heat and continues to generate a predetermined electromotive force. Therefore, in conventional systems that flow current to the coil only by this predetermined electromotive force, the electromagnetic safety valve is opened. The holding state continues, and since only water is used at this time, when the water flow operation of the heat exchanger is performed again, the water pressure response valve opens and raw gas is released. However, in the present invention, the raw gas is released immediately after the burner combustion stops. Since the electromagnetic safety valve can be closed by applying a current in the reverse direction to the coil by the reverse current generating means and reducing the current in the positive direction flowing through the coil to less than the holding current by 1-, raw gas is not released.
（実施例） 次に本発明の実施例を図面に基づいて説明する。(Example) Next, embodiments of the present invention will be described based on the drawings.
第１図において、（１）はバーナ（２）へのガス供給路
（３）に介設した手動開弁型電磁安全弁を示し、該電磁
安全弁（１）は電力消費の少ない複巻コイル（４）を有
し、その一方のコイル（４ａ）を該バーナ（２）で加熱
される熱発電素子たる熱雷対（５）に接続すると共にそ
の他方のコイル（４ｂ）を電源たる電池（６）に接続す
る構成とした。In Fig. 1, (1) shows a manually opened electromagnetic safety valve installed in the gas supply path (3) to the burner (2), and the electromagnetic safety valve (1) is a multi-turn coil (4) with low power consumption. ), one of the coils (4a) is connected to a thermal lightning pair (5) which is a thermoelectric generating element heated by the burner (2), and the other coil (4b) is a battery (6) which is a power source. The configuration was such that it connects to the
該コイル（４ｂ）を電池〈６）に接続する回路（７）に
は点火回路（８）と第１タイマ回路（９）と炎検知回路
ａＯと安全弁駆動回路０１）とを順次介設した。An ignition circuit (8), a first timer circuit (9), a flame detection circuit aO, and a safety valve drive circuit 01) were successively installed in the circuit (7) connecting the coil (4b) to the battery (6).
該点火回路（８）はコンデンサ■と小抵抗値の抵抗ａ３
とから成る放電回路Ｇやおよび該コンデンサ■と大抵抗
値の抵抗０５１とから成る充電回路ａｅを備えた第２タ
イマ回路（１７）を組込んだもので、バーナ（２）の点
火操作の際常開側（Ｎｏ側）に切換わるホールドスイッ
チ■により電池（６）からの電力を発振回路（１つに直
接供給して、これを作動させて点火トランス■の二次側
に高電圧を発生させ、この高電圧を点火電極■に印加さ
せて電極間にスパークを生じさせ、また点火操作解除に
より開く点火スイッチ（′ｌ＆により所定時間の間コン
デンサ■の充電を行なわせ、この所定時間中発振回路１
１印を作動させて上記ホールドスイッチのによるときと
同様に電極間にスパークを生じさせる構成のものとした
。The ignition circuit (8) includes a capacitor ■ and a resistor a3 with a small resistance value.
It incorporates a second timer circuit (17) equipped with a discharging circuit G consisting of a With the hold switch ■ switched to the normally open side (No side), power from the battery (6) is directly supplied to the oscillation circuit (one), which is activated to generate a high voltage on the secondary side of the ignition transformer ■. This high voltage is applied to the ignition electrode (■) to generate a spark between the electrodes, and the ignition switch ('l&), which opens when the ignition operation is released, charges the capacitor (■) for a predetermined period of time. circuit 1
The configuration was such that when mark 1 was activated, a spark was generated between the electrodes in the same way as when the hold switch was activated.
該第１タイマ回路（９）は点火操作に連動して熱電対（
５）から所定起電力が発生されるまで一定時間作動する
もので、バーナ（２）の点火操作の際切換わるホールド
スイッチ■によりコンデンサ■■を一定時間充電させ、
この間トランジスタＱΦＱ５■を導通させて、該一定時
間後段の炎検知回路（ＩＧに電池（６）の電圧を印加さ
せ、炎検知回路（ＩＧを作動準備状態にする構成のもの
とした。The first timer circuit (9) operates a thermocouple (
It operates for a certain period of time until a predetermined electromotive force is generated from 5), and the capacitor ■■ is charged for a certain period of time by the hold switch ■ that is switched when the burner (2) is ignited.
During this period, the transistor QΦQ5 was made conductive, and the voltage of the battery (6) was applied to the flame detection circuit (IG) at the subsequent stage for the certain period of time, thereby setting the flame detection circuit (IG) in a ready state for operation.
該炎検知回路（１０はフレームロッド式のもので、前記
第１タイマ回路（９）の作動により発振回路のを作動さ
せ、該発振回路■からの交流電圧をフレームロッド■に
印加させ、バーナ（２）が着火されたときに炎を介して
フレームロ・ソド■に流れる整流された電流によりトラ
ンジスタ■を不導通にし、トランジスタωを導通にする
構成のものとし、さらに、小抵抗値の抵抗■と小容量の
コンデンサ■とから成る充電回路■を備えた第３タイマ
回路■を組込んで、炎のゆらぎ、酸素濃度の低下等によ
りフレームロッド■に瞬時の開所定電流が流れずトラン
ジスタ■が不導通になっても、その瞬時の間例えば０．
８秒間該コンデンサ■に充電電流が流れて該トランジス
タωが導通する構成のものとした。The flame detection circuit (10 is of a flame rod type, and the oscillation circuit is activated by the operation of the first timer circuit (9), and the alternating current voltage from the oscillation circuit (2) is applied to the flame rod (2). When 2) is ignited, the rectified current that flows through the flame through the flame rod ■ causes the transistor ■ to become non-conductive and the transistor ω to conduct. A third timer circuit ■ equipped with a charging circuit ■ consisting of a capacitor ■ and a small capacity capacitor ■ is incorporated, and the transistor ■ is activated when the instantaneous opening current does not flow through the flame rod ■ due to fluctuations in the flame, a drop in oxygen concentration, etc. Even if it becomes non-conductive, for example, 0.
The configuration was such that a charging current flows through the capacitor (1) for 8 seconds and the transistor (ω) becomes conductive.
該安全弁駆動回路（１１）はトランジスタ■と電流制限
用の抵抗ωとコイル（４ｂ）とから成り、該炎検知回路
（ＩＧのトランジスタ■が不導通でトランジスタωが導
通のとき、スイッチたるトランジスタωが導通して電池
（６）の電圧をコイル（４ｂ）に印加させる構成のもの
とした。The safety valve drive circuit (11) is composed of a transistor (1), a current limiting resistor (ω), and a coil (4b), and when the flame detection circuit (IG) transistor (2) is non-conductive and the transistor (ω) is conductive, the transistor (11) as a switch is The coil (4b) is configured to be electrically conductive so that the voltage of the battery (6) is applied to the coil (4b).
■は前記カズ供給路（３）の電磁安全弁（１）の下流側
に介設した水圧応動弁を示し、該水圧応動弁ωは前記バ
ーナ（２）で加熱される熱交換器■の上流端に接続され
る給水管■に介設された水ガバナ司の通水時の変位に連
動して開弁する構成とした。(2) indicates a hydraulically responsive valve installed downstream of the electromagnetic safety valve (1) in the Kazu supply path (3), and the hydraulically responsive valve (ω) is at the upstream end of the heat exchanger (2) heated by the burner (2). The valve is configured to open in conjunction with the displacement of the water governor installed in the water supply pipe (1) connected to the water supply pipe (2) when water is flowing.
図中、（財）はガスガバナ、りは点火バーナ、静はパー
ジ弁、菊は常火バーナ、■はパイロット弁を夫々示す。In the figure, (foundation) indicates a gas governor, ri indicates an ignition burner, Shizuka indicates a purge valve, chrysanthemum indicates a permanent burner, and ■ indicates a pilot valve.
かくするときは、点火操作と通水操作によって電磁安全
弁（１）、パイロット弁但、バージ弁静、水圧応動弁■
が開弁されて、バーナ（２）、点火バーナー、常火バー
ナ急にガスが供給されると共に、点火スイッチ■が閉じ
、点火回路（８）の所定時間の作動が開始され、これと
同時にホールドスイッチのが切換わり、第１タイマ回路
（９）の−定時間の作動が開始され、電池（６）の電圧
がトランジスタ■を介して炎検知回路（ＩＧに印加され
、炎検知回路（１０は作動準備状態におかれる。この場
合、点火操作解除後も第２タイマ回路（Ｉ７１により所
定時間スパークが継続される。When doing so, the electromagnetic safety valve (1), pilot valve, barge valve static, and water pressure response valve should be activated by ignition and water flow operations.
is opened, gas is suddenly supplied to the burner (2), ignition burner, and constant flame burner, the ignition switch ■ is closed, and the ignition circuit (8) starts operating for a predetermined time, and at the same time, the hold The switch is changed, the first timer circuit (9) starts to operate for a fixed period of time, and the voltage of the battery (6) is applied to the flame detection circuit (IG) via the transistor ■, and the flame detection circuit (10 is The engine is placed in a state ready for operation. In this case, even after the ignition operation is canceled, the second timer circuit (I71) continues to generate a spark for a predetermined period of time.
ここで上記点火操作が燃焼器の使用開始の際いわゆるコ
ールドスタートの際であれば、バーナ（２）が点火回路
（８）のスパークにより点火バーナ泌、常火バーナ（２
）を介して瞬時に着火し且つ炎のゆらぎ、酸素濃度の低
下等がないときは、フレームロッド■に整流電流が連続
して流れ、炎検知回路（′ＩＯが連続作動して電池（６
）の電圧が安全弁駆動回路（Ｉ″Ｄのスイッチたるトラ
ンジスタ■を介して電磁安全弁（１）ノコイル（４ｂ）
の供給され、該電磁安全弁（１）は第１タイマ回路（９
）の一定時間開弁状態に保持され、次いで電磁安全弁（
１）はバーナ（２）で加熱される熱電対（５）からの所
定起電力によりコイル（４ａ）が通電されて開弁状態に
保持されてバーナ（２）の燃焼が継続される。尚、第２
図（ａ）に示すようにバーナ（２）が瞬時に着火したが
、炎のゆらぎ、酸素濃度の低下等により、瞬時の間フレ
ームロッド■に所定の整流電流が流れず、その後所定の
整流電流が流れるようになったときは、その瞬時の間第
３タイマ回路■により第２図（ｅ）に示すように炎検知
回路（１０が強制時に作動されて電磁安全弁（１）は第
２図（ＩＩＩ）に示すように開弁状態に保持され、その
後は上記したバーナ（２）が瞬時に着火し且つ炎のゆら
ぎ、酸素濃度の低下等がないときと同様炎検知回路（′
ＩＯの作動と熱雷対（５）からの所定起電力とにより該
電磁安全弁（１）は開弁状態に保持されて、バーナ（２
）の燃焼が継続され、熱交換器■の下流端に接続される
出湯管（イ）から湯が得られる。尚、フレームロッド■
に流れる整流電流が第２図（ａ）の点線示のように変化
した場合にも、第３タイマ回路■が電磁安全弁（１）を
開弁状態に保持することができるのは勿論である。Here, if the above ignition operation is at the time of a so-called cold start when the combustor starts to use, the burner (2) is ignited by the spark of the ignition circuit (8), and the constant burner (2) is
), and when there is no flame fluctuation or decrease in oxygen concentration, a rectified current continuously flows through the flame rod ■, and the flame detection circuit ('IO) is activated continuously,
) voltage is applied to the electromagnetic safety valve (1) coil (4b) through the safety valve drive circuit (transistor ■ which is the switch of I″D).
is supplied, and the electromagnetic safety valve (1) is supplied with a first timer circuit (9
) is held open for a certain period of time, then the electromagnetic safety valve (
In 1), the coil (4a) is energized by a predetermined electromotive force from the thermocouple (5) heated by the burner (2), and the valve is held in an open state to continue combustion in the burner (2). Furthermore, the second
As shown in Figure (a), the burner (2) ignited instantly, but due to flame fluctuations, a drop in oxygen concentration, etc., the specified rectified current did not flow through the flame rod ■ for an instant, and then the specified rectified current did not flow. When the flame detection circuit (10) starts to flow, the flame detection circuit (10) is activated during that instant by the third timer circuit (2) as shown in Fig. 2 (e), and the electromagnetic safety valve (1) is activated as shown in Fig. 2 (e). The valve is held open as shown in III), and then the flame detection circuit ('
The electromagnetic safety valve (1) is held open by the operation of the IO and a predetermined electromotive force from the thermal lightning pair (5), and the burner (2) is kept open.
) continues to burn, and hot water is obtained from the outlet pipe (A) connected to the downstream end of the heat exchanger (I). In addition, frame rod ■
Of course, even if the rectified current flowing through the valve changes as shown by the dotted line in FIG. 2(a), the third timer circuit (2) can keep the electromagnetic safety valve (1) open.
また、バーナ（２）が点火回路（８）スパークにり瞬時
に着火しないときは、フレームロッド■に電流が流れず
、炎検知回路ＧＯが不作動となって電池（６）の電圧ガ
コイル（４ｂ）に供給されず、電磁安全弁（１）は速や
かに閉弁され、バーナ（２）は停止状態に維持される。In addition, if the burner (2) does not ignite instantly due to the spark in the ignition circuit (8), no current flows to the flame rod ■, the flame detection circuit GO becomes inactive, and the battery (6) voltage ga coil (4b ), the electromagnetic safety valve (1) is immediately closed, and the burner (2) is maintained in a stopped state.
上記点火操作が、燃焼器の使用中バーナ（２）の消火操
作を行ない、その後直ちにバーナ（２）の際点火操作を
行なう際いわゆるホットスタートの際でもあれば、第１
タイマ回路（９）、炎検知回路（ＩＧ、安全弁駆動回路
（１１）の作動・不作動に関係なく、残存する熱により
熱雷対（５）からは所定起電力が発生され続け、これが
コイル（４ｂ）に供給され、電磁安全弁（１）が開弁状
態に保持されるので、バーナ（２）が点火回路（８）の
スパークにより瞬時に着火したときは、バーナ（２）の
燃焼が継続され、出湯管（１）から湯が得られる。If the above-mentioned ignition operation is a so-called hot start, in which the burner (2) is extinguished while the combustor is in use, and then the burner (2) is immediately ignited, the first
Regardless of whether the timer circuit (9), flame detection circuit (IG), or safety valve drive circuit (11) is activated or not, the remaining heat continues to generate a predetermined electromotive force from the thermal lightning pair (5), which causes the coil ( 4b) and the electromagnetic safety valve (1) is held open, so that when the burner (2) is instantly ignited by the spark of the ignition circuit (8), the combustion of the burner (2) is continued. , hot water is obtained from the hot water tap (1).
また、バーナ（２）が点火回路（８）のスパークにより
瞬時に着火しないときは第２タイマ回路面の作動により
点火回路（８）の作動が所定時間継続されるので、この
所定時間内にバーナ（２）は確実に着火され、バーナ（
２）の燃焼が開始され出湯管（イ）から湯が得られる。Furthermore, if the burner (2) does not ignite instantaneously due to the spark of the ignition circuit (8), the operation of the ignition circuit (8) is continued for a predetermined period of time by the operation of the second timer circuit. (2) is surely ignited, and the burner (
The combustion of step 2) starts and hot water is obtained from the hot water outlet pipe (a).
したがって、点火操作を十分な時間をかけて行なう場合
は勿論のこと瞬時に行なう場合であっても生ガスの放出
が継続されることがなく安全である。Therefore, even when the ignition operation is carried out over a sufficient period of time, and even when it is carried out instantaneously, the raw gas is not continuously discharged, making it safe.
その後バーナ（２）の消火操作と熱交換器■の通水停止
操作とを行なうと、ホールドスイッチのが常閉側（ＮＣ
側）に切換わって点火スイッチａｅを閉じても点火回路
（８）が不作動になり、水圧応動弁■が閉じてバーナ（
Ｄの燃焼が停止されると共に出湯管（イ）からの出湯も
停止される。この上
バーナ（２）の燃焼停止直後は残った熱にあり熱電対（
５）が加熱され、所定起電力を発生し続けているため、
前記作用の項で述べたように、この所定起電力のみによ
りコイル（４ｂ）へ電流を流す従来のものでは、電磁安
全弁（１）の開弁保持状態が続き、このとき水のみを使
用するため再び熱交換器■の通水操作を行なうと、水圧
応動弁Ｇ７１が再び開くので、生ガスが放出されてしま
うが、本発明では、電池（６）、ホールドスイッチ■、
コイル（４ｂ）、コンデンサＵから成る逆電流発生手段
処を設け、これにより、バーナ（２）の燃焼停止から熱
雷対（５）の起電力が所定起電力未満に降下するまでの
間、コイル（４ｂ）に矢印の方向の逆電流を流してコイ
ル（４ｂ）に流れる正方向の電流を保持電流以下にして
電磁安全弁（１）を閉弁させるようにしたので、生ガス
が放出されることがない。After that, when the burner (2) is extinguished and the water flow to the heat exchanger ■ is stopped, the hold switch is set to the normally closed side (NC
side) and close the ignition switch ae, the ignition circuit (8) will be deactivated and the water pressure response valve
The combustion of D is stopped, and the hot water from the hot water tap (A) is also stopped. Immediately after the upper burner (2) stops burning, the remaining heat is present and the thermocouple (
5) is heated and continues to generate a predetermined electromotive force,
As mentioned in the section of the above-mentioned operation, in the conventional system in which current flows to the coil (4b) only by this predetermined electromotive force, the electromagnetic safety valve (1) remains open, and at this time only water is used. When water is supplied to the heat exchanger (■) again, the water pressure response valve G71 opens again, and raw gas is released. However, in the present invention, the battery (6), the hold switch (■),
A reverse current generating means consisting of a coil (4b) and a capacitor U is provided, and this allows the coil to remain active from the time combustion of the burner (2) stops until the electromotive force of the thermal lightning pair (5) falls below a predetermined electromotive force. Since the electromagnetic safety valve (1) is closed by applying a reverse current in the direction of the arrow to the coil (4b) and making the positive current flowing through the coil (4b) below the holding current, the raw gas is released. There is no.
尚、上記実施例では熱電対（５）の外に熱電対滲を用意
し、両者（５）（ト）を互いに逆極性に接続し、これを
コイル（４ａ）に接続する構成として、バーナ（２）が
酸欠状態になったとき、熱電対□□□から熱雷対（５）
とは逆方向の起電力が発生するようにし、両者（５）（
＋９の起電力が相殺されて電磁安全弁（１）が閉じるよ
うにした。In the above embodiment, a thermocouple leak is prepared outside the thermocouple (5), and both (5) (g) are connected with opposite polarity to each other, and this is connected to the coil (4a). 2) becomes oxygen deficient, the thermocouple □□□ to the thermocouple (5)
An electromotive force is generated in the opposite direction to (5) (
The electromotive force of +9 was canceled out and the electromagnetic safety valve (1) was closed.
（発明の効果）
このように本発明によるときは、バーナの燃焼停止から
熱発電素子の起電力が所定起電力未満になるまでの間、
逆電流発生手段によりコイルに逆電流を流して電磁安全
弁を閉弁させるようにしたので、バーナの燃焼停止直後
、水のみを使用するため再度熱交換器の通水操作のみを
行ない、水圧応動弁が開弁された場合であっても、生ガ
スの放出が防止される効果を有する。(Effects of the Invention) As described above, according to the present invention, from the time when combustion of the burner stops until the electromotive force of the thermoelectric generating element becomes less than a predetermined electromotive force,
Since the reverse current generation means causes a reverse current to flow through the coil and close the electromagnetic safety valve, immediately after the burner stops burning, only water is used in the heat exchanger again, so the water pressure-responsive valve is closed. This has the effect of preventing raw gas from being released even if the valve is opened.
第１図は本発明の実施の１例を示す回路図であり、第２
図はその作動を説明するタイムチャートである。
（１）・・・電磁安全弁
（２）・・・バ − す
（３）・・・ガス供給路
（４）・・・コ イ ル
（５）・・・熱電対（熱発電素子）
Ｇ７）・・・水圧応動弁
■・・・熱交換器
（ト）・・・逆電流発生手段FIG. 1 is a circuit diagram showing one example of implementation of the present invention, and FIG.
The figure is a time chart explaining its operation. (1)...Solenoid safety valve (2)...Bass (3)...Gas supply path (4)...Coil (5)...Thermocouple (thermoelectric generating element) G7) ...Hydraulic pressure responsive valve ■...Heat exchanger (G)...Reverse current generation means
Claims (1)
される熱交換器への通水により開弁する水圧応動弁とを
介設すると共に、該バーナに臨ませた熱発電素子を該電
磁安全弁のコイルに接続し、点火操作に連動して開弁し
た該電磁安全弁を、該熱発電素子から発生される所定起
電力で開弁状態に保持して該バーナの燃焼を継続させる
ようにしたものにおいて、該電磁安全弁のコイルに、該
バーナの燃焼停止から該熱発電素子の起電力が所定起電
力未満になるまでの間、逆電流を流す逆電流発生手段を
設けたことを特徴とする給湯器の燃焼制御装置。In the gas supply path to the burner, an electromagnetic safety valve and a hydraulically responsive valve that opens when water passes through the heat exchanger heated by the burner are installed, and a thermoelectric generating element facing the burner is connected to the electromagnetic safety valve. The electromagnetic safety valve, which is connected to the coil of the safety valve and opened in conjunction with the ignition operation, is held open by a predetermined electromotive force generated from the thermoelectric generating element to continue combustion of the burner. The electromagnetic safety valve is characterized in that a reverse current generating means is provided in the coil of the electromagnetic safety valve for causing a reverse current to flow from the time combustion of the burner stops until the electromotive force of the thermoelectric generating element becomes less than a predetermined electromotive force. Combustion control device for water heaters.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1038954A JPH0749849B2 (en) | 1989-02-18 | 1989-02-18 | Combustion control device for water heater |
| KR1019890015213A KR920008878B1 (en) | 1989-02-18 | 1989-10-21 | Combustion control device of hot water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1038954A JPH0749849B2 (en) | 1989-02-18 | 1989-02-18 | Combustion control device for water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02217714A true JPH02217714A (en) | 1990-08-30 |
| JPH0749849B2 JPH0749849B2 (en) | 1995-05-31 |
Family
ID=12539587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1038954A Expired - Lifetime JPH0749849B2 (en) | 1989-02-18 | 1989-02-18 | Combustion control device for water heater |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0749849B2 (en) |
| KR (1) | KR920008878B1 (en) |
-
1989
- 1989-02-18 JP JP1038954A patent/JPH0749849B2/en not_active Expired - Lifetime
- 1989-10-21 KR KR1019890015213A patent/KR920008878B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR920008878B1 (en) | 1992-10-10 |
| JPH0749849B2 (en) | 1995-05-31 |
| KR900013252A (en) | 1990-09-05 |
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