JPS6243099B2 - - Google Patents
Info
- Publication number
- JPS6243099B2 JPS6243099B2 JP58008223A JP822383A JPS6243099B2 JP S6243099 B2 JPS6243099 B2 JP S6243099B2 JP 58008223 A JP58008223 A JP 58008223A JP 822383 A JP822383 A JP 822383A JP S6243099 B2 JPS6243099 B2 JP S6243099B2
- Authority
- JP
- Japan
- Prior art keywords
- microcomputer
- output
- flame
- solenoid valve
- circuit
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 14
- 239000000446 fuel Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 description 5
- 238000010411 cooking Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F23N5/20—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
- F23N2223/00—Signal processing; Details thereof
- F23N2223/08—Microprocessor; Microcomputer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2229/00—Flame sensors
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)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明はガス器具等燃焼器の燃焼制御を行なう
もので、特にマイクロコンピユータを用いた燃焼
制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is for controlling combustion in a combustor such as a gas appliance, and particularly relates to a combustion control device using a microcomputer.
(ロ) 従来の技術
湯沸器、調理器等のバーナの点滅制御を行なう
燃焼制御装置で、特にマイクロコンピユータを用
いたものでは、電界効果型トランジスタ（以下
FETと称す）等を用い、例えば炎の整流作用を
利用して炎の有無を検出する炎検出回路を少なく
とも一対設け、その出力をマイクロコンピユータ
の入力に各々接続していた。その為マイコンの暴
走、クロツク停止等マイコン自体の故障時には、
炎の有無に関係なく燃料供給を制御する電磁弁が
開いたままとなる等安全動作を行なえなくなる可
能性がある。(b) Conventional technology Combustion control devices that control the flashing of burners in water heaters, cookers, etc., especially those that use microcomputers, use field-effect transistors (hereinafter referred to as
At least one pair of flame detection circuits were provided to detect the presence or absence of a flame by using flame rectification, for example, using a FET (FET), and the outputs of the circuits were each connected to the input of a microcomputer. Therefore, in the event of a malfunction of the microcomputer itself, such as runaway of the microcomputer or stoppage of the clock,
There is a possibility that the solenoid valve that controls fuel supply will remain open regardless of the presence or absence of flame, making it impossible to perform safe operations.
(ハ) 発明の目的
本考案は上記の問題点に鑑み、マイコンの出力
に関係なく少なくとも失火時には燃料供給用の電
磁弁を閉じて安全側動作を行なう事を目的とす
る。(c) Purpose of the Invention In view of the above-mentioned problems, the object of the present invention is to perform safe operation by closing the solenoid valve for fuel supply in the event of a misfire, regardless of the output of the microcomputer.
(ニ) 発明の構成
本発明の構成は、炎の有無を検出する為の炎検
出回路を少なくとも一対有し、この一方又は両方
の出力をマイクロコンピユータの入力ポートに接
続すると共に、マイクロコンピユータの出力をバ
ーナへの燃料流路を開閉する電磁弁を制御する弁
回路に接続し、かつ炎検出回路の少なくとも一方
の出力を弁回路に接続して成るもので、バーナの
失火時には他方の炎検出回路の出力にて直接電磁
弁を安全側動作することで、マイコンの不測の故
障時にも失火時には確実に電磁弁を閉成し得る。(d) Structure of the Invention The structure of the present invention has at least one pair of flame detection circuits for detecting the presence or absence of a flame, the output of one or both of which is connected to the input port of the microcomputer, and the output of the microcomputer is connected to the input port of the microcomputer. is connected to a valve circuit that controls a solenoid valve that opens and closes the fuel flow path to the burner, and at least one output of the flame detection circuit is connected to the valve circuit.When the burner misfires, the output of the other flame detection circuit is By directly operating the solenoid valve on the safe side with the output of the microcomputer, the solenoid valve can be reliably closed in the event of a misfire even in the event of an unexpected failure of the microcomputer.
(ホ) 実施例
本発明の実施例を図面に基づき説明すると、１
はストアードプログラム方式の４ビツトマイコン
２を用いたガスオーブン制御用の制御回路で、電
源入力ＶSSを図示しない直流電源のグランドに接
続し、電源入力ＶGGに同じくマイナス電源（−
12V前後）を接続する。そしてクロツク入力
CL0，CL1には所定の発振回路３を接続している
と共に、一次巻線４を商用の交流電源５に接続し
たトランス６の二次巻線７を用いた交流信号源８
をガスバーナ９の炎孔１０に配設したフレームロ
ツド１１に接続し、かつこれをゲートに接続し炎
の整流作用による整流信号到来時に非導通する
FET１２を主に構成する、周知の炎検出回路１
３の出力であるFET１２のソースを入力I1に接続
している。(e) Embodiments Examples of the present invention will be explained based on the drawings: 1
is a control circuit for controlling a gas oven using a stored program type 4-bit microcomputer 2. The power input V SS is connected to the ground of a DC power supply (not shown), and the power input V GG is also connected to a negative power supply (-
(around 12V). and clock input
A predetermined oscillation circuit 3 is connected to CL 0 and CL 1 , and an AC signal source 8 uses a secondary winding 7 of a transformer 6 whose primary winding 4 is connected to a commercial AC power source 5.
is connected to the flame rod 11 disposed in the flame hole 10 of the gas burner 9, and this is connected to the gate so that it becomes non-conductive when a rectification signal arrives due to the rectification effect of the flame.
Well-known flame detection circuit 1 mainly consisting of FET 12
The source of FET 12, which is the output of FET 3, is connected to input I1 .
１４は上記と同じ構成から成る他の炎検出回路
でその出力であるFET１５のソースにダイオー
ド１６を介して抵抗１７，１８とコンデンサ１９
から成るCRタイマー２０を接続していると共
に、このCRタイマーにはコレクタをマイコン２
の出力O1に接続したトランジスタ２１のベース
にツエナーダイオード２２を介して接続してい
る。又上記トランジスタ２１のコレクタにはコレ
クタにフオトカプラのLED２３を接続したトラ
ンジスタ２４のベースを接続していると共に、こ
のトランジスタのエミツタにはベースをマイコン
２の出力O2に接続したトランジスタ２５のコレ
クタに接続している。そして上記フオトカプラの
フオトトランジスタ２６のエミツタ出力は、上記
ガスバーナ９への燃料流路２７に設けた電磁弁２
８に直列接続しこれの通電を制御するトランジス
タ２９のベースに接続して弁回路３０を構成して
成る。尚上記電磁弁２８等へは交流電源５を整流
器３１にて整流して供給している。 14 is another flame detection circuit having the same configuration as above, and its output is connected to the source of FET 15 via a diode 16 to resistors 17, 18 and a capacitor 19.
A CR timer 20 consisting of
It is connected via a Zener diode 22 to the base of a transistor 21 connected to the output O 1 of the . The collector of the transistor 21 is connected to the base of a transistor 24 whose collector is connected to a photocoupler LED 23, and the emitter of this transistor is connected to the collector of a transistor 25 whose base is connected to the output O2 of the microcomputer 2. are doing. The emitter output of the phototransistor 26 of the photocoupler is connected to the solenoid valve 2 provided in the fuel passage 27 to the gas burner 9.
The valve circuit 30 is connected to the base of a transistor 29 which is connected in series to the transistor 8 and controls its energization. Note that the AC power source 5 is rectified by a rectifier 31 and supplied to the electromagnetic valve 28 and the like.
更に入力I2には常閉のタイマスイツチ３２を接
続し、これより調理動作を取り込んでいる。３３
は調理が終了してタイマスイツチ３２が閉成時に
CRタイマー２０のコンデンサ１９を放電させる
放電用ダイオード、３４は同じく放電用のダイオ
ードで、負荷の温度検出回路等に接続され、負荷
が設定温度に達するとこれを介してコンデンサ１
９を放電させ電磁弁２８を閉じて温度制御を行な
うものである。 Furthermore, a normally closed timer switch 32 is connected to the input I2 , and cooking operations are taken in from this. 33
When the cooking is finished and the timer switch 32 is closed,
A discharge diode 34 discharges the capacitor 19 of the CR timer 20, which is also connected to the temperature detection circuit of the load, and when the load reaches the set temperature, the capacitor 1 is
9 is discharged and the solenoid valve 28 is closed to perform temperature control.
而してタイマスイツチ３２を開いて調理を開始
すると、マイコン２内に予じめ記憶したプログラ
ムによつて、その出力O1，O2を一定時間ハイと
し、トランジスタ２４，２５をオンしてLED２
３に通電し、電磁弁２８を開いて同時にガスバー
ナ９の点火動作を行なう。この時点火せず上記マ
イコン２にて設定した一定時間内に入力I1，I2よ
り有炎信号が入力されなければ、マイコン２はこ
れを検出して出力O1，O2をローとし、トランジ
スタ２４をオフしてLED２３への通電を停止し
電磁弁２８を閉じる。 When the timer switch 32 is opened to start cooking, the outputs O 1 and O 2 are set high for a certain period of time according to a program stored in the microcomputer 2, and the transistors 24 and 25 are turned on to turn on the LED 2.
3 is energized, the solenoid valve 28 is opened, and the gas burner 9 is ignited at the same time. If there is no ignition at this point and a flame signal is not input from the inputs I 1 and I 2 within a certain period of time set by the microcomputer 2, the microcomputer 2 detects this and sets the outputs O 1 and O 2 to low. The transistor 24 is turned off to stop energizing the LED 23 and the solenoid valve 28 is closed.
一方点火されるとFET１２，１５がカツトオ
フして有炎信号を入力I1，I2に出力すると共に、
CRタイマー２０のコンデンサ１９の充電を阻止
しトランジスタ２１をオフしてトランジスタ２４
を継続してオンし電磁弁２３を開き続ける。尚マ
イコン２は、上記入力I1，I2への有炎信号の入力
により、出力O1，O2から継続してハイ信号を出
力する。 On the other hand, when ignited, FETs 12 and 15 cut off and output flame signals to inputs I 1 and I 2 , and
It prevents charging of the capacitor 19 of the CR timer 20, turns off the transistor 21, and turns off the transistor 24.
continues to turn on, and the solenoid valve 23 continues to open. Note that the microcomputer 2 continuously outputs high signals from the outputs O 1 and O 2 by inputting the flame signal to the inputs I 1 and I 2 .
又マイコンの異常動作により失火時に出力
O1，O2がハイの時には、他の炎検出回路１４の
FET１５のオンによりCRタイマー２０のコンデ
ンサ１９が充電され、ツエナーダイオード２２の
しきい値以上に成るとトランジスタ２１がオンし
てトランジスタ２４をオフし、LED２３への通
電を停止して電磁弁２８を閉じ安全側制御を行な
う。従つてCRタイマー２０の設定時間はバーナ
９の点火動作時に出力O1，O2を一定時間ハイに
する時間よりも長く設定する。 Also, the output occurs when there is a misfire due to abnormal operation of the microcomputer.
When O 1 and O 2 are high, other flame detection circuits 14
When the FET 15 is turned on, the capacitor 19 of the CR timer 20 is charged, and when the voltage exceeds the threshold of the Zener diode 22, the transistor 21 is turned on, turning off the transistor 24, stopping power supply to the LED 23, and closing the solenoid valve 28. Perform safe control. Therefore, the set time of the CR timer 20 is set longer than the time during which the outputs O 1 and O 2 are kept high for a certain period of time when the burner 9 is ignited.
(ヘ) 発明の効果
上記本発明の構成により、マイクロコンピユー
タを用いてバーナの炎検出を行なうと共に燃料供
給用の電磁弁を制御することで、バーナの点火動
作を行なう時間等を従来のCRタイマー、コンパ
レータ等を用いる事なく任意に設定することがで
きると共に、マイクロコンピユータの出力にて上
記電磁弁を制御する為の弁回路に、炎検出回路の
出力を接続し、この炎検出回路にて直接電磁弁を
閉成制御することで、マイコンの不測の異常動作
時にも、バーナの失火時には確実に電磁弁を閉
じ、安全制御を行なうことができる。(f) Effects of the Invention With the configuration of the present invention described above, by using a microcomputer to detect the burner flame and controlling the solenoid valve for fuel supply, the burner ignition time etc. , can be set arbitrarily without using a comparator, etc., and the output of the flame detection circuit is connected to the valve circuit for controlling the above solenoid valve with the output of the microcomputer, and the output of the flame detection circuit is directly controlled by the output of the microcomputer. By controlling the closing of the solenoid valve, even in the event of an unexpected abnormal operation of the microcomputer, the solenoid valve can be reliably closed in the event of a burner misfire, and safety control can be performed.
図面は本発明による燃焼制御装置の回路図であ
る。
２……マイクロコンピユータ、９……ガスバー
ナ、１３，１４……炎検出回路、３０……弁回
路。
The drawing is a circuit diagram of a combustion control device according to the present invention. 2... Microcomputer, 9... Gas burner, 13, 14... Flame detection circuit, 30... Valve circuit.
Claims (1)
一対有し、このどちらか一方又は両方の出力をマ
イクロコンピユータの入力に接続すると共に、マ
イクロコンピユータの出力をバーナへの燃料流路
を開閉する電磁弁を制御する弁回路に接続し、か
つ上記炎検出回路の少なくとも一方の出力も上記
弁回路に接続して成る燃焼制御装置。1. A solenoid valve that has at least one pair of flame detection circuits that detect the presence or absence of a flame, connects the output of one or both to the input of a microcomputer, and opens and closes the output of the microcomputer to the fuel flow path to the burner. a combustion control device connected to a valve circuit that controls the flame detection circuit, and at least one output of the flame detection circuit is also connected to the valve circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58008223A JPS59134425A (en) | 1983-01-20 | 1983-01-20 | Combustion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58008223A JPS59134425A (en) | 1983-01-20 | 1983-01-20 | Combustion control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59134425A JPS59134425A (en) | 1984-08-02 |
| JPS6243099B2 true JPS6243099B2 (en) | 1987-09-11 |
Family
ID=11687179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58008223A Granted JPS59134425A (en) | 1983-01-20 | 1983-01-20 | Combustion control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59134425A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61128026A (en) * | 1984-11-27 | 1986-06-16 | Hanshin Electric Co Ltd | Safety circuit for combustion controlling device |
| JP7104314B2 (en) * | 2018-06-28 | 2022-07-21 | ミツミ電機株式会社 | Semiconductor integrated circuit equipment for electronic control and electronic control equipment for gas stoves |
-
1983
- 1983-01-20 JP JP58008223A patent/JPS59134425A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59134425A (en) | 1984-08-02 |
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