JPH0765741B2 - Combustor controller - Google Patents

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は湯沸器その他の燃焼器、特に電磁安全弁を備え
た燃焼器の制御装置に関する。Description: TECHNICAL FIELD The present invention relates to a controller for a water heater and other combustors, particularly a combustor having an electromagnetic safety valve.

（従来の技術） 従来のこの種装置として、バーナへの燃料供給路に介設
される電磁安全弁と、タイマ回路と、該電磁安全弁のコ
イルに接続され該バーナで加熱される熱電素子とを備
え、点火操作に連動して開弁した該電磁安全弁を、該熱
電素子から所定起電力を生じるまでは該タイマ回路の一
定時間の作動により開弁状態に保持し、該所定起電力を
生じたときはこの起電力により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 provided in a fuel supply path to a burner, a timer circuit, and a thermoelectric element connected to a coil of the electromagnetic safety valve and heated by the burner are provided. , The electromagnetic safety valve opened in conjunction with the ignition operation is kept open by the operation of the timer circuit for a certain period of time until the predetermined electromotive force is generated from the thermoelectric element, and when the predetermined electromotive force is generated It is known that the electromotive force keeps the valve open to continue the combustion of the burner.

（発明が解決しようとする課題） しかしながら、上記熱電素子は一般に消火操作後も残存
起電力を有するため上記従来のものによれば、電磁安全
弁は消火操作後にもかかわらず20〜30秒間開弁状態に保
持される不都合があった。(Problems to be Solved by the Invention) However, since the thermoelectric element generally has a residual electromotive force even after a fire extinguishing operation, according to the above conventional one, the electromagnetic safety valve is open for 20 to 30 seconds even after the fire extinguishing operation. There was an inconvenience to be held in.

そこで、第４図に示すように、切換スイッチａが上側の
端子ｂに接続される消火操作時に電源ｃにより充填させ
るコンデンサｄを設け、該コンデンサｄの充電により熱
電素子ｅの起電力を打ち消す電流を流して速やかに閉弁
させるようにすることも考えられるが、このものは点火
操作に連動して開弁した電磁安全ｆを、該熱電素子ｅか
ら所定起電力を生じるまではタイマ回路ｇと炎検知回路
ｈの作動による該電源ｃからのトランジスタi,jを介す
る電力で開弁保持するもので、これによれば、点火操作
時にも該コンデンサｄが充電され、この充電が消火操作
時におけるコンデサｄの能力ダウンとなるため、該コン
デンサｄとして大容量のものが必要となり、さらにこの
能力ダウンの度合は一定でないため、熱電素子ｅの起電
力を打ち消す電流の流れる時間が一定しない等の不都合
がある。Therefore, as shown in FIG. 4, a switch d is connected to the upper terminal b to provide a capacitor d to be charged by a power source c during a fire extinguishing operation, and a current for canceling the electromotive force of the thermoelectric element e by charging the capacitor d. It is conceivable that the valve is closed immediately by flowing the electromagnetic safety f which is opened in conjunction with the ignition operation, and is connected to the timer circuit g until a predetermined electromotive force is generated from the thermoelectric element e. This is for holding the valve open with the electric power from the power source c through the transistors i and j due to the operation of the flame detection circuit h. According to this, the capacitor d is charged even during the ignition operation, and this charging is performed during the extinguishing operation. Since the capacity of the capacitor d is reduced, a large capacity is required as the capacitor d, and the degree of this capacity reduction is not constant, so that the current that cancels the electromotive force of the thermoelectric element e is reduced. There is a disadvantage of such time is not constant.

（課題を解決するための手段） 本発明は上記不都合を無くした装置を提供しようとする
ものであって、バーナへの燃料供給路に介設される電磁
安全弁と、タイマ回路と、該電磁安全弁のコイルに接続
され該バーナで加熱される熱電素子とを備え、点火操作
に連動して開弁した該電磁安全弁を、該熱電素子から所
定起電力を生じるまでは該タイマ回路の一定時間の作動
により開弁状態に保持し、該所定起電力を生じたときは
この起電力により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、該熱電素子の起電
力を打ち消す方向の電流を流す回路を設け、該回路にス
イッチング素子を介入接続し、消火操作時にのみ充電又
は放電されるコンデンサを設け、該コンデンサの充電又
は放電により該スイッチング素子を導通させるようにし
たことを特徴とする。(Means for Solving the Problem) The present invention is intended to provide a device that eliminates the above-mentioned inconvenience, and is an electromagnetic safety valve provided in a fuel supply path to a burner, a timer circuit, and the electromagnetic safety valve. The electromagnetic safety valve, which is connected to the coil and is heated by the burner, is opened in conjunction with the ignition operation, and the timer circuit operates for a certain time until a predetermined electromotive force is generated from the thermoelectric element. In the case where the electromotive force of the thermoelectric element is canceled by holding the valve in the open state, and when the predetermined electromotive force is generated, the electromotive force holds the valve in the open state to continue the combustion of the burner. Is provided with a circuit for passing a current, a switching element is interveningly connected to the circuit, and a capacitor that is charged or discharged only at the time of fire extinguishing operation is provided, and the switching element is made conductive by charging or discharging the capacitor. It is characterized by having been made to let.

（作 用） 本発明は上記構成によるもので、これによれば、消火操
作時にのみコンデンサは充電又は放電され、この充電又
は放電によりスイッチング素子を導通させて熱電素子の
起電力を打ち消す方向の電流を流して電磁安全弁を速や
かに閉弁するようにしたので、点火操作時に該コンデン
サが充電又は放電されることはなく、したがって、消火
操作時における能力ダウンとなることはない。(Operation) The present invention has the above-described structure. According to the present invention, the capacitor is charged or discharged only at the time of fire extinguishing operation, and the current in the direction of canceling the electromotive force of the thermoelectric element by conducting the switching element by this charging or discharging. Since the electromagnetic safety valve is quickly closed by flowing the current, the capacitor is not charged or discharged at the time of ignition operation, and therefore the capacity is not reduced at the time of fire extinguishing operation.

（実施例） 次に本発明をガス湯沸器に適用した場合の実施の１例を
図面に基づいて説明する。(Example) Next, one example of an embodiment in which the present invention is applied to a gas water heater will be described with reference to the drawings.

図面で１は主バーナ、２は点火バーナ、３は常火バーナ
を夫々示し、該主バーナ１へのガス供給路４には、手動
開弁型電磁安全弁５と水圧応動弁６と調圧弁７とが介設
され、該ガス供給路４の該電磁安全弁５と水圧応動弁６
との間から分岐される該点火バーナ２と常火バーナ３へ
のガス供給路８には点火バーナ用開閉弁９と常火バーナ
用開閉弁10とが介設される。さらに該点火バーナ２に
は、点火プラグ11が臨ませて設けられ、該常火バーナ３
には、熱電素子たる熱電対12とフレームロッド13とが臨
ませて設けられる。In the drawings, 1 is a main burner, 2 is an ignition burner, and 3 is a normal-fire burner. In a gas supply passage 4 to the main burner 1, a manually opened solenoid-operated safety valve 5, a water pressure responsive valve 6, and a pressure regulating valve 7 are shown. And the electromagnetic safety valve 5 and the water pressure responsive valve 6 in the gas supply path 4.
An ignition burner on-off valve 9 and a normal-fire burner on-off valve 10 are provided in a gas supply path 8 to the ignition burner 2 and the normal-fire burner 3 which are branched from between. Further, the ignition burner 2 is provided with an ignition plug 11 so as to face the ignition burner 3.
A thermocouple 12, which is a thermoelectric element, and a frame rod 13 are provided facing each other.

14は該主バーナ１で加熱される熱交換器を示し、該熱交
換器14の給水路15には、通水弁16と調圧弁17と水ガバナ
18とが介設される。Reference numeral 14 denotes a heat exchanger heated by the main burner 1, and a water passage 15 of the heat exchanger 14 has a water passage valve 16, a pressure regulating valve 17, and a water governor.
And 18 are installed.

前記水圧応動弁６は、該通水弁16を開弁したとき変位す
る水ガバナ18により開弁される。The water pressure responsive valve 6 is opened by a water governor 18 which is displaced when the water passage valve 16 is opened.

ここで、34は出湯・止湯ボタンであり、電磁安全弁５、
点火バーナ用開閉弁９、常火バーナ用開閉弁10及び通水
弁16を手動開弁させる。Here, 34 is a hot water / hot water button, an electromagnetic safety valve 5,
The ignition burner open / close valve 9, the normal fire burner open / close valve 10 and the water flow valve 16 are manually opened.

35は出水・止水ボタンであり、出湯・止湯ボタン34とは
無関係に、単独操作で通水弁16を手動開弁させる。Denoted at 35 is a water discharge / stop water button, and the water flow valve 16 is manually opened by an independent operation regardless of the hot water discharge / stop water button 34.

これらボタン34,35の操作による上記機能は、実開昭63
−99156号広報で広く知られている。The above functions by operating these buttons 34, 35 are
-99156 is widely known in public relations.

19は図示しない排気口側に設けた酸欠検知用の熱電対を
示す。次に上記構成のガス湯沸器の制御回路について説
明する。Reference numeral 19 denotes a thermocouple for detecting oxygen deficiency, which is provided on the exhaust port side (not shown). Next, the control circuit of the gas water heater having the above configuration will be described.

前記電磁安全弁５は電力消費の少ない複巻コイル20を有
し、この一方のコイル20aを常火バーナ３で加熱される
熱電対12に接続すると共にその他方のコイル20bを電源
たる電池21に接続する構成とした。The electromagnetic safety valve 5 has a multi-winding coil 20 that consumes less power, one coil 20a of which is connected to a thermocouple 12 heated by a normal-fire burner 3 and the other coil 20b is connected to a battery 21 which is a power source. It was configured to do.

該コイル20bを電池21に接続する回路22には、点火回路2
3とタイム回路24と炎検知回路25を順次介設した。The circuit 22 connecting the coil 20b to the battery 21 includes an ignition circuit 2
3, the time circuit 24, and the flame detection circuit 25 were sequentially provided.

該点火回路23は点火操作の際にのみ閉成される点火スイ
ッチ26により作動され、点火プラグ11に所定時間スパー
クを生じさせる。The ignition circuit 23 is operated by an ignition switch 26 that is closed only during ignition operation, and causes the spark plug 11 to spark for a predetermined time.

該タイマ回路24は点火操作の際に下側の端子27aに切換
接続される切換スイッチ27により作動され、トランジス
タ28を一定時間導通させる。The timer circuit 24 is operated by the changeover switch 27 which is connected to the lower terminal 27a during the ignition operation to make the transistor 28 conductive for a certain time.

該炎検知回路25は該タイマ回路24の作動によ該トランジ
スタ28の導通により作動準備状態におかれ、常火バーナ
３が着火してフレームロッド13に電流が流れたとき作動
され、トラジスタ29を導通させる。The flame detection circuit 25 is put into a ready state for operation by the conduction of the transistor 28 by the operation of the timer circuit 24, and is operated when the normal-fire burner 3 ignites and a current flows through the frame rod 13, thereby turning on the transistor 29. Make it conductive.

かくするときは、出湯操作によって電磁安全弁５と開閉
弁9,10とが開弁し、点火バーナ２と常火バーナ３にガス
が供給されると共に、点火スイッチ26が閉じ、点火回路
23の所定時間の作動が開始され、これと同時に切換スイ
ッチ27が下側の端子27aに切換接続されてタイマ回路24
の一定時間の作動が開始され、点火バーナ２が点火回路
23のスパークにより着火され、これにより常火バーナ３
が火移り着火したときは、炎検知回路25が作動して電池
21の電圧がトランジスタ28,29を介して電磁安全弁５の
コイル20bに供給され、、該電磁安全弁５はタイマ回路2
4の一定時間開閉弁状態に保持され、次いで該電磁安全
弁５は常火バーナ３で加熱される熱電対12からの所定起
電力によりコイル20aが通電されて開弁状態に保持され
て、常火バーナ３の燃焼が接続される。また、上記出湯
操作により常火バーナ３が点火後これに引き続いて通水
弁16は開いて通水され、水ガバナ18の変位により水圧応
動弁６が開弁し、主バーナ１が常火バーナ３から火移り
着火され、該主バーナ１により熱交換器14が加熱され
て、給湯路30から湯が得られる。At this time, the electromagnetic safety valve 5 and the on-off valves 9 and 10 are opened by the tapping operation, the gas is supplied to the ignition burner 2 and the normal-fire burner 3, and the ignition switch 26 is closed to make the ignition circuit.
The operation of the timer circuit 23 is started for a predetermined time, and at the same time, the changeover switch 27 is switch-connected to the lower terminal 27a so that the timer circuit 24
The operation of the ignition burner 2 is started for a certain period of time, and the ignition burner 2
It was ignited by 23 sparks, which caused a permanent burner 3
If the fire catches fire, the flame detection circuit 25 operates and the battery
The voltage of 21 is supplied to the coil 20b of the electromagnetic safety valve 5 via the transistors 28 and 29, and the electromagnetic safety valve 5 is connected to the timer circuit 2
4, the electromagnetic safety valve 5 is held in the open state by the coil 20a being energized by a predetermined electromotive force from the thermocouple 12 heated by the normal-fire burner 3 and kept in the open state. The combustion of the burner 3 is connected. Further, after the normal-fire burner 3 is ignited by the tapping operation, the water valve 16 is subsequently opened to allow water to flow, and the displacement of the water governor 18 causes the hydraulic pressure responsive valve 6 to open, so that the main burner 1 becomes the normal-fire burner. The heat is ignited from 3 and the heat exchanger 14 is heated by the main burner 1 to obtain hot water from the hot water supply passage 30.

尚、開閉弁９は出湯操作時のみ開弁するものであり、す
なわち出湯操作後は点火バーナ２は消火状態に維持され
る。The on-off valve 9 is opened only during the hot water discharge operation, that is, the ignition burner 2 is maintained in the extinguished state after the hot water discharge operation.

尚、出湯操作時に常火バーナ３が着火しないときは、炎
検知回路25が不着化を検出して電池21の電圧がコイル20
bに供給されず、電磁安全弁５は開弁保持されず消化状
態に維持される。In addition, when the normal-burner 3 does not ignite during hot water operation, the flame detection circuit 25 detects non-adhesion and the voltage of the battery 21 changes to the coil 20.
The electromagnetic safety valve 5 is not held open and is maintained in a digested state without being supplied to b.

尚、出湯・止湯ボタン34による止湯操作時には切換スイ
ッチ27が上側の端子27bに復帰するようにした。The changeover switch 27 is returned to the upper terminal 27b when the hot water is stopped by the hot water / hot water button 34.

また、熱電対12と熱電対19は互いに逆極性に接続し、こ
れをコイル20aに接続する構成として、酸欠状態等で主
バーナ１が不良燃料になったとき、熱電対19から熱電対
12とは逆方向の起電力が発生するようにし、両者12,19
の起電力が相殺されて電磁安全弁５が閉じるようにし
た。Further, the thermocouple 12 and the thermocouple 19 are connected in opposite polarities to each other and connected to the coil 20a, so that when the main burner 1 becomes a defective fuel due to oxygen deficiency or the like, the thermocouple 19 to the thermocouple 19
The electromotive force in the opposite direction to 12 is generated and both
The electromagnetic safety valve 5 is closed by canceling out the electromotive force.

31は熱電対12の起電力を打ち消す方向の電流を流す逆電
流回路31であり、該回路31にスイッチング素子たるトラ
ンジスタ32を介入接続し、消火操作時にのみ充電される
コンデンサ33を設け、該コンデンサ33の充電により該ト
ランジスタ32を導通させるようにした。尚、この場合、
トランジスタ32とコンデンサ33を２組用意し、信頼性を
向上させるようにした。かくするときは、消火操作によ
り、切換スイッチ27を上側の端子27bに復帰させれば、
電池21によりコンデンサ33が充電され、その充電中はト
ランジスタ32が導通されて、前記回路31は閉回路とな
り、該回路31中のコイル20dに、止湯操作後の熱電対12
からの残存起電力を打ち消す方向の点線示の電流が流
れ、該電磁安全弁５は速やかに閉弁される。尚、次の点
火操作により切換スイッチ27を下側の端子27aに切換接
続したときは、コンデンサ33は放電された後、その両端
の電位が等しくなり、充電されることはない。Reference numeral 31 is a reverse current circuit 31 for flowing a current in a direction of canceling the electromotive force of the thermocouple 12, a transistor 32 as a switching element is interveningly connected to the circuit 31, and a capacitor 33 that is charged only during a fire extinguishing operation is provided. The transistor 32 is made conductive by charging 33. In this case,
Two sets of transistors 32 and capacitors 33 were prepared to improve reliability. In this case, if you change the switch 27 to the upper terminal 27b by extinguishing the fire,
The capacitor 21 is charged by the battery 21, the transistor 32 is turned on during the charging, and the circuit 31 becomes a closed circuit, and the coil 20d in the circuit 31 is connected to the thermocouple 12 after the hot water operation.
The electric current shown by the dotted line in the direction of canceling the remaining electromotive force from flows through the electromagnetic safety valve 5 and is promptly closed. When the changeover switch 27 is switched and connected to the lower terminal 27a by the next ignition operation, the capacitor 33 is discharged, and then the potentials at both ends thereof become equal and are not charged.

尚、上記した実施例では、止湯操作時に電磁安全弁５は
速やかに閉弁されるため、常火バーナ３は速やかに消火
され、また止湯操作後すぐに出水・止水ボタン35にて出
水操作をして水圧応動弁６を開弁させてもガスの流出は
無く、すなわちその後の出湯操作時における爆発着火の
危険はないため有利である。In the embodiment described above, the electromagnetic safety valve 5 is quickly closed during the hot water operation, so that the normal fire burner 3 is quickly extinguished, and the water / water stop button 35 is used immediately after the hot water operation. Even if the water pressure responsive valve 6 is opened by operation, there is no outflow of gas, that is, there is no danger of explosion and ignition during the subsequent tapping operation, which is advantageous.

尚、上記した実施例では、コンデンサ33が充電されたと
き、熱電対12からの所定起電力を打ち消す方向の電流を
流すようにしたが、コンデンサが放電されたとき熱電対
12からの所定起電力を打ち消す方向の電流を流すように
しても良い。In the above-described embodiment, when the capacitor 33 is charged, the current in the direction of canceling the predetermined electromotive force from the thermocouple 12 is made to flow, but when the capacitor is discharged, the thermocouple is discharged.
A current may be made to flow in the direction of canceling the predetermined electromotive force from 12.

尚、上記した実施例はガス湯沸器の場合であるが、電磁
安全弁を備えた燃焼器であれば、どんな燃焼器にも適用
可能である。Although the above-mentioned embodiment is a case of a gas water heater, it can be applied to any combustor provided that it has an electromagnetic safety valve.

（発明の効果） このように本発明によるときは、消火操作時に熱電素子
の起電力を打ち消す方向の電流を流すようにして電磁安
全弁を閉弁させたので、該電流を流さない前記従来のも
のに比して該電磁安全弁を速やかに閉弁させることがで
きる効果を有し、さらに消火操作時のみ充電又は放電さ
れるコンデンサの充電又は放電によりスイッチング素子
を導通させ、熱電素子の起電力を打ち消す方向の電流を
流すようにしたので、消火操作時に限らず点火操作時に
も充電されるコンデンサを備えるものに比してコンデン
サの容量を小さくすることができると共に該電流を確実
に一定時間流すことができる効果を有する。(Effects of the Invention) As described above, according to the present invention, the electromagnetic safety valve is closed by passing a current in the direction of canceling the electromotive force of the thermoelectric element during the fire extinguishing operation, so that the conventional one that does not pass the current is used. In comparison with the above, the electromagnetic safety valve can be closed promptly, and the switching element is made conductive by charging or discharging the capacitor that is charged or discharged only during the fire extinguishing operation, and the electromotive force of the thermoelectric element is canceled. Since the unidirectional current is made to flow, the capacity of the capacitor can be made smaller than that of the one provided with a capacitor that is charged not only during the fire extinguishing operation but also during the ignition operation, and the current can be surely flowed for a certain period of time. Has the effect that can.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明を湯沸器に適用した場合の実施例の１例
を示すガス系統図、第２図はその制御回路図、第３図は
そのガス弁の部分の裁断側面図、第４図は本発明の創作
過程において考えられた制御回路図である。 １……主バーナ、２……点火バーナ ３……常火バーナ（バーナ） 4,8……ガス供給路、５……電磁安全弁 12……熱電対（熱電素子） 31……逆電流回路 32……トランジスタ（スイッチング素子） 33……コンデンサ 34……出湯・止湯ボタン 35……出水・止水ボタンFIG. 1 is a gas system diagram showing an example of an embodiment in which the present invention is applied to a water heater, FIG. 2 is a control circuit diagram thereof, and FIG. 3 is a cut side view of a gas valve portion thereof. FIG. 4 is a control circuit diagram considered in the creation process of the present invention. 1 …… Main burner, 2 …… Ignition burner 3 …… Constant fire burner (burner) 4,8 …… Gas supply path, 5 …… Electromagnetic safety valve 12 …… Thermocouple (thermoelectric element) 31 …… Reverse current circuit 32 ...... Transistor (switching element) 33 …… Capacitor 34 …… Hot water / stop button 35 …… Water / stop button

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】バーナへの燃料供給路に介設される電磁安
全弁と、タイマ回路と、該電磁安全弁のコイルに接続さ
れ該バーナで加熱される熱電素子とを備え、点火操作に
連動して開弁した該電磁安全弁を、該熱電素子から所定
起電力を生じるまでは該タイマ回路の一定時間の作動に
より開弁状態に保持し、該所定起電力を生じたときはこ
の起電力により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、該熱電素子の起電力
を打ち消す方向の電流を流す回路を設け、該回路にスイ
ッチング素子を介入接続し、消火操作時にのみ充電又は
放電されるコンデンサを設け、該コンデンサの充電又は
放電により該スイッチング素子を導通させるようにした
ことを特徴とする燃焼器の製造装置。1. An electromagnetic safety valve provided in a fuel supply path to a burner, a timer circuit, and a thermoelectric element connected to a coil of the electromagnetic safety valve and heated by the burner, and interlocked with ignition operation. The electromagnetic safety valve that has been opened is held in the open state by the operation of the timer circuit for a certain time until a predetermined electromotive force is generated from the thermoelectric element, and when the predetermined electromotive force is generated, the electromagnetic safety valve is opened by this electromotive force. In a state in which the burner is maintained in a state of continuing combustion, a circuit for supplying a current in a direction of canceling the electromotive force of the thermoelectric element is provided, a switching element is interveningly connected to the circuit, and charging is performed only during a fire extinguishing operation. Alternatively, a combustor manufacturing apparatus is characterized in that a capacitor to be discharged is provided and the switching element is made conductive by charging or discharging the capacitor.