JPH0668372B2 - Combustion appliance control circuit - Google Patents

Combustion appliance control circuit

Info

Publication number
JPH0668372B2
JPH0668372B2 JP61263414A JP26341486A JPH0668372B2 JP H0668372 B2 JPH0668372 B2 JP H0668372B2 JP 61263414 A JP61263414 A JP 61263414A JP 26341486 A JP26341486 A JP 26341486A JP H0668372 B2 JPH0668372 B2 JP H0668372B2
Authority
JP
Japan
Prior art keywords
air volume
combustion
oil pump
control circuit
timer
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
Application number
JP61263414A
Other languages
Japanese (ja)
Other versions
JPS63118524A (en
Inventor
伸治 武津
誠 岡田
敏弘 堀内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP61263414A priority Critical patent/JPH0668372B2/en
Publication of JPS63118524A publication Critical patent/JPS63118524A/en
Publication of JPH0668372B2 publication Critical patent/JPH0668372B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/30—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Control Of Combustion (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明は風量検出器により燃焼器具の燃焼室へ送られる
風量を検出し、この風量が異常に減少した時には異常燃
焼を防止するために燃焼を停止させる燃焼器具の制御回
路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects the amount of air sent to the combustion chamber of a combustion instrument by an air flow detector, and when the amount of air decreases abnormally, stops combustion to prevent abnormal combustion. The present invention relates to a control circuit for a burning appliance.

従来の技術 近年、燃焼器具の制御回路は、燃焼室へ送られる風量を
検出し、この風量が異常に減少した時には異常燃焼を防
止するために燃焼を停止させ安全性の向上をはかってい
る。2. Description of the Related Art In recent years, a control circuit of a combustion appliance detects the amount of air sent to a combustion chamber, and when this amount of air decreases abnormally, the combustion is stopped to prevent abnormal combustion, and safety is improved.

以下、図面を参照しながら、上述した従来の燃焼器具の
制御回路の一例として石油給湯機の例で説明する。Hereinafter, an example of a petroleum water heater will be described as an example of a control circuit of the above-described conventional combustion appliance with reference to the drawings.

第６図は従来の燃焼器具の制御回路のうちの風量検出器
（圧力スイッチ）を含む油ポンプ駆動回路の回路図であ
る。第５図は風量と圧力スイッチの動作関係図である。
第３図は石油給湯機の構造図である。第３図において、
４１は燃焼室４５に空気を供給する送風機、４２は燃焼
室４５内の混合気に着火を行なう点火器、２０は燃焼室
４５内に燃料供給するポンプ、１０は送風路４６と気化
筒４９内の圧力差から風量を検出し一定レベル以上の風
量で接点が閉じる圧力スイッチ、４７は空気の流れ、４
８は本石油給湯機の電気回路の制御を行なう制御装置、
４９はノズル５０から噴出する燃料を気化させるための
気化筒、５０は油ポンプ４３から送られた燃料を燃焼室
４５内に噴出させるノズルである。FIG. 6 is a circuit diagram of an oil pump drive circuit including an air flow detector (pressure switch) in a conventional control circuit for a combustion appliance. FIG. 5 is an operation relationship diagram of the air volume and the pressure switch.
FIG. 3 is a structural diagram of an oil water heater. In FIG.
Reference numeral 41 is a blower for supplying air to the combustion chamber 45, 42 is an igniter for igniting the air-fuel mixture in the combustion chamber 45, 20 is a pump for supplying fuel into the combustion chamber 45, 10 is a blower passage 46 and a vaporization tube 49. The pressure switch detects the air volume from the pressure difference and closes the contact when the air volume exceeds a certain level. 47 is the air flow, 4
8 is a control device for controlling the electric circuit of the oil water heater,
49 is a vaporizing cylinder for vaporizing the fuel ejected from the nozzle 50, and 50 is a nozzle for ejecting the fuel sent from the oil pump 43 into the combustion chamber 45.

第５図において、(a)図と(d)図が従来の風量と圧力スイ
ッチの動作関係を示すものであって、風量がＣレベル以
上で圧力スイッチの接点が閉じる事を表わす。第６図に
おいて、１はリレーＲＬ３を駆動するためのＤＣ１２Ｖ
電源、２は油ポンプ駆動信号で、油ポンプを駆動する必
要のある時はハイレベルの信号となる。３は制御回路の
ＯＶである。１５はトランジスタ１７へ流れこむ電流を
制限する抵抗、１６はトランジスタ１７を安定に動作さ
せるためのバイアス抵抗、１７は油ポンプ駆動信号によ
り、リレーＲＬ３のコイル６０を駆動するトランジスタ
である。２０は燃焼室４５に燃料を供給する油ポンプ、
２２は油ポンプ２０を駆動するためのＡＣ１００Ｖ電
源、６１は油ポンプ２０のＯＮ・ＯＦＦを制御するリレ
ーＲＬ３の接点、１０は風量が第５図(a)のＣレベル以
上で接点が閉じる圧力スイッチである。In FIGS. 5A and 5B, FIGS. 5A and 5D show the operation relationship between the conventional air volume and the pressure switch, and show that the contact of the pressure switch is closed when the air volume is C level or higher. In FIG. 6, 1 is DC12V for driving the relay RL3.
Power supplies 2 are oil pump drive signals, which are high level signals when it is necessary to drive the oil pump. Reference numeral 3 is an OV of the control circuit. Reference numeral 15 is a resistor that limits the current flowing into the transistor 17, 16 is a bias resistor for stably operating the transistor 17, and 17 is a transistor that drives the coil 60 of the relay RL3 by an oil pump drive signal. 20 is an oil pump for supplying fuel to the combustion chamber 45,
Reference numeral 22 is an AC100V power source for driving the oil pump 20, 61 is a contact of the relay RL3 for controlling the ON / OFF of the oil pump 20, and 10 is a pressure switch whose contact is closed when the air volume is C level or higher in FIG. 5 (a). Is.

以上のように構成された燃焼器具の制御回路について、
以下その動作について説明する。Regarding the control circuit of the combustion appliance configured as described above,
The operation will be described below.

まず送風機４１がＯＮして風量が第５図(a)のＣレベル
まで達すると圧力スイッチ１０が閉じる。その後、油ポ
ンプ駆動信号２がハイレベルになると抵抗１５を介して
電流がトランジスタ１７に流れ、トランジスタ１７がＯ
Ｎ状態となる。圧力スイッチ１０が閉、トランジスタ１
７がＯＮするとリレーＲＬ３のコイル６０に電流が流
れ、リレーＲＬ３の接点６１が閉じる。その結果、油ポ
ンプ２０にＡＣ１００Ｖ電源２２が供給され、油ポンプ
２０が動作し、燃料が燃焼室４５へ送られる。そして、
燃焼室へ送られる風量が異常減少し、Ｃレベル以下にな
ると圧力スイッチ１０が開となり、油ポンプ駆動信号２
の有無にかかわらずリレーＲＬ３のコイル６０への電流
が断たれ、リレーＲＬ３の接点６１が開となる。よっ
て、油ポンプ２０の電源が断たれ油ポンプ２０が停止
し、燃焼室４５への燃料供給がしゃ断される。First, when the blower 41 is turned on and the air volume reaches the C level in FIG. 5 (a), the pressure switch 10 is closed. After that, when the oil pump drive signal 2 goes high, a current flows through the resistor 15 to the transistor 17 and the transistor 17 turns off.
The N state is set. Pressure switch 10 closed, transistor 1
When 7 is turned on, a current flows through the coil 60 of the relay RL3, and the contact 61 of the relay RL3 is closed. As a result, the AC 100V power source 22 is supplied to the oil pump 20, the oil pump 20 operates, and the fuel is sent to the combustion chamber 45. And
When the amount of air sent to the combustion chamber decreases abnormally and becomes below the C level, the pressure switch 10 opens and the oil pump drive signal 2
Regardless of the presence or absence of the current, the current to the coil 60 of the relay RL3 is cut off, and the contact 61 of the relay RL3 is opened. Therefore, the power of the oil pump 20 is cut off, the oil pump 20 is stopped, and the fuel supply to the combustion chamber 45 is cut off.

（例えば、実開昭６１−４８２５５号公報） 発明が解決しようとする問題点 しかしながら上記のような構成では、着火時に燃焼室４
５の圧力が急激に高くなるので風量が一時的に減少して
もその風量の減少を異常とはみなさないように、風量検
出器（圧力スイッチ１０）の風量検出レベルを着火時の
最低風量であるＢレベル以下に設定しなければならなか
った。そのため、風量がＢレベル以上ではあるが異常減
少し、異常燃焼状態となったとしてもそれを風量検出器
（圧力スイッチ１０）で検出することはできないという
問題点を有していた。(For example, Japanese Utility Model Laid-Open No. 61-48255) Problems to be Solved by the Invention However, in the above-mentioned configuration, the combustion chamber 4 is ignited at the time of ignition.
Since the pressure of 5 rapidly rises, even if the air volume temporarily decreases, the air volume detection level of the air volume detector (pressure switch 10) is set to the minimum air volume at the time of ignition so that the decrease in the air volume is not considered abnormal. It had to be set below a certain B level. Therefore, there is a problem in that even if the air volume is above the B level, it abnormally decreases, and even if an abnormal combustion state occurs, it cannot be detected by the air volume detector (pressure switch 10).

本発明は上記問題点に鑑み、着火時の風量の一時的減少
には関係なく、風量検出器（圧力スイッチ１０）の風量
検出レベルを任意に設定できる燃焼器具の制御回路を提
供するものである。In view of the above problems, the present invention provides a control circuit for a combustion appliance that can arbitrarily set the air volume detection level of the air volume detector (pressure switch 10) regardless of the temporary reduction of the air volume during ignition. .

問題点を解決するための手段 上記問題点を解決するために本発明の燃焼器具の制御回
路は、燃焼器具の燃焼室へ送られる風量を検出する風量
検出器をもち、この風量が異常に減少した時には停止す
るが、燃料供給開始時から一定時間は風量の検出を無効
とするためのタイマー回路を設けたものである。Means for Solving the Problems In order to solve the above problems, the control circuit of the combustion appliance of the present invention has an air volume detector that detects the volume of air sent to the combustion chamber of the combustion appliance, and this air volume decreases abnormally. A timer circuit is provided for invalidating the detection of the air volume for a certain period of time from the start of fuel supply, though the timer circuit is stopped.

作用 本発明は上記の構成により、燃料供給開始時から一定時
間は風量の検出を無効とするため、着火時の一時的な風
量減少は無視されるので、風量検出器の風量検出レベル
は任意に設定することが可能となる。Effect The present invention has the above-described configuration and disables the detection of the air volume for a certain period from the start of fuel supply, so that the temporary air volume decrease at the time of ignition is ignored, so the air volume detection level of the air volume detector can be arbitrarily set. It becomes possible to set.

実施例 以下本発明の一実施例の燃焼器具の制御回路について石
油給湯機を例として図面を参照しながら説明する。Embodiment A control circuit for a combustion appliance according to an embodiment of the present invention will be described below with reference to the drawings, using an oil water heater as an example.

第１図は、本発明の一実施例における燃焼器具の制御回
路の風量検知器・タイマー回路及び油ポンプ駆動回路の
回路図である。第１図において、１は制御回路を動作さ
せるためのＤＣ１２Ｖ電源、２は油ポンプ駆動信号で油
ポンプを駆動させる必要のあるときはハイレベルとな
る。３は制御回路のＯＶである。４は油ポンプ駆動信号
の立ち上がりから一定時間ハイレベルの出力を出すタイ
マーＩＣである。５はタイマーＩＣ４の電源端子、６は
タイマーＩＣ４のグランド端子、７はタイマーＩＣ４の
入力端子、８はタイマーＩＣ４の出力端子である。９
は、タイマーＩＣのハイレベルの出力信号だけを次段の
トランジスタ１３に伝えるダイオードである。１０は風
量が第５図(a)のＡレベル以上であると接点が閉じる風
量検出器としての圧力スイッチである。１１はトランジ
スタ１３に流れこむ電流を制限する抵抗、１２はトラン
ジスタ１２を安定に動作させるためのバイアス抵抗、１
３はリレーＲＬ１のコイル１４を駆動するためのトラン
ジスタである。１４はトランジスタ１３により駆動され
るリレーＲＬ１のコイルである。１５はトランジスタ１
７に流れこむ電流を制限する抵抗、１６はトランジスタ
１７を安定に動作させるための抵抗である。１７はリレ
ーＲＬ２のコイル１８を駆動するためのトランジスタで
ある。１８はトランジスタ１７によって駆動され、油ポ
ンプ２０のＯＮ・ＯＦＦを行なうリレーＲＬ２のコイル
である。１９はリレーＲＬ１の接点である。２０は燃焼
のための燃料を供給するための油ポンプである。２１は
リレーＲＬ２の接点である。２２はＡＣ１００Ｖ電源で
ある。２３はリレーＲＬ１のコイル１４及びリレーＲＬ
２のコイル１８の逆起電力吸収用ダイオードである。３
５はタイマーＩＣで構成されるタイマー回路である。FIG. 1 is a circuit diagram of an air flow rate detector / timer circuit and an oil pump drive circuit of a control circuit of a combustion appliance according to an embodiment of the present invention. In FIG. 1, 1 is a DC12V power supply for operating the control circuit, and 2 is a high level when it is necessary to drive the oil pump with an oil pump drive signal. Reference numeral 3 is an OV of the control circuit. Reference numeral 4 is a timer IC that outputs a high level for a certain period of time after the rise of the oil pump drive signal. Reference numeral 5 is a power supply terminal of the timer IC 4, 6 is a ground terminal of the timer IC 4, 7 is an input terminal of the timer IC 4, and 8 is an output terminal of the timer IC 4. 9
Is a diode for transmitting only the high level output signal of the timer IC to the transistor 13 in the next stage. Reference numeral 10 is a pressure switch as an air flow detector whose contacts are closed when the air flow is above the A level in FIG. 5 (a). Reference numeral 11 is a resistor for limiting the current flowing into the transistor 13, 12 is a bias resistor for operating the transistor 12 in a stable manner, 1
Reference numeral 3 is a transistor for driving the coil 14 of the relay RL1. Reference numeral 14 is a coil of the relay RL1 driven by the transistor 13. 15 is a transistor 1
A resistor for limiting the current flowing into 7 and a resistor 16 for operating the transistor 17 stably. Reference numeral 17 is a transistor for driving the coil 18 of the relay RL2. Reference numeral 18 denotes a coil of the relay RL2 which is driven by the transistor 17 and turns on / off the oil pump 20. Reference numeral 19 is a contact of the relay RL1. Reference numeral 20 is an oil pump for supplying fuel for combustion. Reference numeral 21 is a contact of the relay RL2. 22 is an AC100V power supply. 23 is the coil 14 of the relay RL1 and the relay RL
It is a diode for absorbing the back electromotive force of the second coil 18. Three
Reference numeral 5 is a timer circuit composed of a timer IC.

第２図は、同実施例における燃焼器具の制御回路のブロ
ック図を示すものである。３０は燃焼シーケンス制御回
路、３１は送風機駆動回路、３２は点火器駆動回路、３
３は油ポンプ駆動回路、３４は油ポンプ駆動回路３３と
結合された風量検出器である。３５は油ポンプ駆動回路
と結合されたタイマー回路である。FIG. 2 is a block diagram of a control circuit of the combustion appliance in the same embodiment. 30 is a combustion sequence control circuit, 31 is a blower drive circuit, 32 is an igniter drive circuit, 3
Reference numeral 3 is an oil pump drive circuit, and 34 is an air volume detector coupled to the oil pump drive circuit 33. Reference numeral 35 is a timer circuit connected to the oil pump drive circuit.

第３図は同実施例における石油給湯機の構造図である。
構成は従来例と同一である。第４図はタイマーＩＣ４の
動作タイミング図である。Ｔ０はタイマーＩＣ４の入力
端子７にハイレベルの信号が入力された時刻、Ｔ１はタ
イマーＩＣ４の出力がハイレベルとなるタイマー時間で
ある。FIG. 3 is a structural diagram of the oil water heater in the same embodiment.
The configuration is the same as the conventional example. FIG. 4 is an operation timing chart of the timer IC 4. T 0 is the time when a high level signal is input to the input terminal 7 of the timer IC 4, and T 1 is the timer time at which the output of the timer IC 4 becomes high level.

第５図(a)(b)(c)は燃焼室４５に送られる風量と圧力ス
イッチ１０の動作及び風量信号となるリレーＲＬ１の動
作を示す図である。第５図(a)のＡ・Ｂ・Ｃは風量のレ
ベルを示し、Ｔ１〜Ｔ９までは時間を示す。5 (a), (b) and (c) are diagrams showing the amount of air sent to the combustion chamber 45, the operation of the pressure switch 10 and the operation of the relay RL1 which is an air flow signal. A, B, and C in FIG. 5 (a) indicate the level of air volume, and T 1 to T 9 indicate time.

以上のように構成された燃焼器具の制御回路について第
１図〜第５図までを用いてその動作を説明する。The operation of the control circuit of the combustion instrument configured as described above will be described with reference to FIGS. 1 to 5.

まず第５図(b)は風量検出器である圧力スイッチ１０の
動作を示すもので、第５図(a)の風量がＡレベル以上で
圧力スイッチ１０の接点が閉じる。この圧力スイッチ１
０は風量の検出レベルを着火時の一時的な風量減少の最
低レベルＢより高く風量の異常減少とされるレベルＡに
設定されている。よって、着火時の一時的な風量減少時
には一旦接点は開となる。First, FIG. 5 (b) shows the operation of the pressure switch 10 which is an air flow detector. The contact of the pressure switch 10 is closed when the air flow in FIG. 5 (a) is A level or higher. This pressure switch 1
0 is set to the level A, which is higher than the minimum level B of the temporary reduction in air volume at the time of ignition and is considered to be an abnormal reduction in air volume. Therefore, the contacts are once opened when the air volume temporarily decreases at the time of ignition.

次に第１図は風量検出器（圧力スイッチ１０）・タイマ
ー回路３５及び油ポンプ駆動回路３３の回路図であって
この動作を説明する。まず、送風機４１がＯＮして燃焼
室４５へ送られる風量が第５図(a)のＡレベルに達する
と圧力スイッチ１０の接点が閉じ、抵抗１１を通してト
ランジスタ１３へ電流が流れるためトランジスタ１３が
ＯＮする。トランジスタ１３がＯＮするとリレーＲＬ１
のコイル１４に電流が流れ、リレーＲＬ１の接点１９が
閉じる。この後油ポンプ駆動信号２がハイレベルになる
と、タイマーＩＣ４の入力端子７がハイレベルになるた
め、第４図のＴ１時間だけ出力端子８にハイレベルが出
力される。この出力はダイオード９を通って抵抗１１に
印加されるので圧力スイッチ１０の接点の開閉にかかわ
らずトランジスタ１３がＯＮとなる。したがって、油ポ
ンプ駆動信号２が立ち上がってからＴ１時間は圧力スイ
ッチ１０の開閉は無視され、リレーＲＬ１の接点は閉と
なる。油ポンプ駆動信号２はタイマーＩＣ４に入力され
ると共に抵抗１５を通ってトランジスタ１７をＯＮとす
る。よってトランジスタ１７がＯＮ、リレーＲＬ１の接
点１９が閉という条件がそろい、リレーＲＬ２のコイル
１８に電流が流れ、リレーＲＬ２の接点２１が閉じ、油
ポンプ２０にＡＣ１００Ｖ電源２２が印加され油ポンプ
２０が動作する。よって油ポンプ２０により燃料が燃焼
室４５へ供給される。燃料供給が開始され、着火が行な
われると、燃焼室４５内の圧力が急激に高くなるため風
量が一時的に減少する。圧力スイッチ１０は風量がＡレ
ベル以下になるので接点を開くが、この時タイマーＩＣ
４のタイマー時間Ｔ１を着火時の一時的な風量減少の時
間（Ｔ５〜Ｔ６）より長く設定しておけば圧力スイッチ
１０の着火時の一時的な開動作は無視され油ポンプ２０
は動作を続ける。タイマーＩＣ４のタイマー時間Ｔ１以
降は、風量が異常減少してＡレベル以下になり圧力スイ
ッチ１０の接点が開くとトランジスタ１３への電流が断
たれるのでトランジスタ１３はＯＦＦし、リレーＲＬ１
の接点１９も開となる。リレーＲＬ１の接点１９が開く
と、油ポンプ駆動信号２がハイレベルであってもリレー
ＲＬ２のコイル１８への電流が断たれ、リレーＲＬ２の
接点２１が開き、油ポンプ２０が停止し、燃料供給が停
止され、燃焼も停止する。Next, FIG. 1 is a circuit diagram of the air flow detector (pressure switch 10) / timer circuit 35 and the oil pump drive circuit 33, and its operation will be described. First, when the blower 41 is turned on and the amount of air sent to the combustion chamber 45 reaches the level A in FIG. 5 (a), the contact of the pressure switch 10 is closed, and the current flows through the resistor 11 to the transistor 13, so that the transistor 13 is turned on. To do. When transistor 13 turns on, relay RL1
A current flows through the coil 14 and the contact 19 of the relay RL1 closes. After that, when the oil pump drive signal 2 becomes high level, the input terminal 7 of the timer IC 4 becomes high level, and therefore the high level is output to the output terminal 8 for the time T 1 in FIG. Since this output is applied to the resistor 11 through the diode 9, the transistor 13 is turned on regardless of whether the contact of the pressure switch 10 is opened or closed. Therefore, the opening / closing of the pressure switch 10 is ignored and the contact of the relay RL1 is closed for T 1 time after the oil pump drive signal 2 rises. The oil pump drive signal 2 is input to the timer IC 4 and passes through the resistor 15 to turn on the transistor 17. Therefore, the condition that the transistor 17 is ON and the contact 19 of the relay RL1 is closed is satisfied, a current flows through the coil 18 of the relay RL2, the contact 21 of the relay RL2 is closed, and the AC 100V power source 22 is applied to the oil pump 20 to cause the oil pump 20 to operate. Operate. Therefore, the fuel is supplied to the combustion chamber 45 by the oil pump 20. When fuel supply is started and ignition is performed, the pressure in the combustion chamber 45 suddenly rises and the air volume temporarily decreases. The pressure switch 10 opens the contact because the air volume becomes less than A level, but at this time the timer IC
If the timer time T 1 of No. 4 is set longer than the time (T 5 to T 6 ) of the temporary air flow reduction at the time of ignition, the temporary opening operation of the pressure switch 10 at the time of ignition is ignored.
Keeps working. The timer time T 1 after the timer IC 4, since the contact of the pressure switch 10 becomes below A level air volume is reduced abnormal current to the transistor 13 is cut off by opening the transistor 13 is OFF, the relay RL1
The contact 19 of is also opened. When the contact 19 of the relay RL1 is opened, the current to the coil 18 of the relay RL2 is cut off even if the oil pump drive signal 2 is at a high level, the contact 21 of the relay RL2 is opened, the oil pump 20 is stopped, and the fuel is supplied. Is stopped and combustion is stopped.

以上のように本実施例によれば、燃焼器具の制御回路に
燃料供給開始時つまり油ポンプが駆動された時から一定
時間は圧力スイッチ（風量検出器）による風量を無効と
するタイマー回路を設けることにより、着火時の風量の
一時的減少にかかわらず圧力スイッチ（風量検出器）の
風量検出レベルを任意に設定できる。As described above, according to the present embodiment, the control circuit of the combustion appliance is provided with the timer circuit that invalidates the air volume by the pressure switch (air volume detector) for a certain period of time after the fuel supply is started, that is, when the oil pump is driven. As a result, the air volume detection level of the pressure switch (air volume detector) can be arbitrarily set regardless of the temporary reduction of the air volume during ignition.

なお、上記実施例において風量検出器３４は圧力スイッ
チ１０としたが、風量検出器３４としてはアネモマスタ
ーの原理を応用したもの、風車によるもの等を使用して
もよい。Although the air volume detector 34 is the pressure switch 10 in the above embodiment, the air volume detector 34 to which the principle of the Anemomaster is applied, a wind turbine, or the like may be used.

また、上記実施例は燃焼器具として石油給湯器を例とし
たが、燃焼器具としてガス給湯器・ふろ釜などがあるこ
とは周知の事実である。Further, although the above-described embodiment has exemplified the petroleum water heater as the burning appliance, it is a well-known fact that the burning appliance includes a gas water heater, a bath, and the like.

また、燃焼器具としてガス給湯器の場合は、上記実施例
の油ポンプ２０はガスの電磁弁となる。Further, in the case of a gas water heater as a combustion appliance, the oil pump 20 of the above embodiment is a gas solenoid valve.

また、実施例のタイマー回路３５はタイマーＩＣ４で構
成したが、タイマーＩＣでなくとも抵抗とコンデンサ及
び電圧比較器で構成されるタイマー回路等でもかまわな
い。Further, although the timer circuit 35 of the embodiment is composed of the timer IC 4, it may be a timer circuit composed of resistors, capacitors and voltage comparators instead of the timer IC.

発明の効果 以上のように本発明は燃焼器具の燃焼室へ送られる風量
を検出する風量検出器をもち、この風量が異常に減少し
た時には燃焼を停止させる燃焼器具の制御回路におい
て、燃料供給開始時から一定時間は風量の検出を無効と
するタイマー回路を設けたことにより、着火時の風量の
一時的減少にかかわらず風量検出器の風量検出レベルを
任意に設定できる。よって、風量の異常減少をすばやく
検出することができ、風量の異常減少による異常燃焼を
防止できるので、きわめて安全性の高い燃焼器具の制御
回路を提供することができる。EFFECTS OF THE INVENTION As described above, the present invention has the air flow rate detector for detecting the air flow rate sent to the combustion chamber of the combustion instrument, and when the air flow rate is abnormally decreased, the control circuit of the combustion instrument starts the fuel supply. By providing a timer circuit that invalidates the detection of the air volume for a certain time from the time, the air volume detection level of the air volume detector can be arbitrarily set regardless of the temporary decrease of the air volume at the time of ignition. Therefore, it is possible to quickly detect an abnormal decrease in the air volume and prevent abnormal combustion due to the abnormal decrease in the air volume, so that it is possible to provide a highly safe control circuit for a combustion appliance.

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

第１図は本発明の一実施例における燃焼器具の制御回路
の風量検知器・タイマー回路及び油ポンプ駆動回路の回
路図、第２図は同燃焼器具の制御回路のブロック図、第
３図は同燃焼器具の制御回路を用いた石油給湯機の構造
図、第４図は同タイマーＩＣの動作タイミング図、第５
図は同圧力スイッチの動作及び従来例の圧力スイッチの
動作と風量の関係を示す図、第６図は従来例における燃
焼器具の制御回路の風量検知器及び油ポンプ駆動回路の
回路図である。 ４、３５……タイマーＩＣ（タイマー回路）、１０、３
４……圧力スイッチ（風量検出器）。FIG. 1 is a circuit diagram of an air flow rate detector / timer circuit and an oil pump drive circuit of a combustion appliance control circuit according to an embodiment of the present invention, FIG. 2 is a block diagram of the combustion appliance control circuit, and FIG. Fig. 4 is a structural diagram of an oil water heater using the control circuit of the combustion appliance. Fig. 4 is an operation timing diagram of the timer IC.
FIG. 6 is a diagram showing the relationship between the operation of the pressure switch and the operation of the pressure switch of the conventional example and the air volume, and FIG. 6 is a circuit diagram of the air volume detector and the oil pump drive circuit of the control circuit of the combustion appliance in the conventional example. 4, 35 ... Timer IC (timer circuit), 10, 3
4 ... Pressure switch (air flow detector).

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】燃焼器具の燃焼室へ送られる風量を検出
し、風量が異常に減少した時には燃焼を停止させる風量
検出器を有し、燃料供給開始時から一定時間は風量の検
出を無効とするタイマー回路を備えた燃焼器具の制御回
路。Claim: What is claimed is: 1. An air flow rate detector for detecting the air flow rate sent to the combustion chamber of a combustion instrument and stopping the combustion when the air flow rate is abnormally decreased, and the detection of the air flow rate is disabled for a certain time from the start of fuel supply. Control circuit for combustion equipment with a timer circuit that activates.
JP61263414A 1986-11-05 1986-11-05 Combustion appliance control circuit Expired - Fee Related JPH0668372B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61263414A JPH0668372B2 (en) 1986-11-05 1986-11-05 Combustion appliance control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61263414A JPH0668372B2 (en) 1986-11-05 1986-11-05 Combustion appliance control circuit

Publications (2)

Publication Number Publication Date
JPS63118524A JPS63118524A (en) 1988-05-23
JPH0668372B2 true JPH0668372B2 (en) 1994-08-31

Family

ID=17389163

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61263414A Expired - Fee Related JPH0668372B2 (en) 1986-11-05 1986-11-05 Combustion appliance control circuit

Country Status (1)

Country Link
JP (1) JPH0668372B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2628395B2 (en) * 1990-03-23 1997-07-09 北陸電気工業株式会社 Pyroelectric infrared detector
MX2018008489A (en) * 2016-01-13 2019-05-30 Babington Tech Inc Atomization burner with flexible fire rate.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58107450U (en) * 1982-01-07 1983-07-21 株式会社東芝 flame detection circuit
JPS58181151U (en) * 1982-05-24 1983-12-03 三菱電機株式会社 combustion device

Also Published As

Publication number Publication date
JPS63118524A (en) 1988-05-23

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