JPS6139572B2 - - Google Patents
Info
- Publication number
- JPS6139572B2 JPS6139572B2 JP55030757A JP3075780A JPS6139572B2 JP S6139572 B2 JPS6139572 B2 JP S6139572B2 JP 55030757 A JP55030757 A JP 55030757A JP 3075780 A JP3075780 A JP 3075780A JP S6139572 B2 JPS6139572 B2 JP S6139572B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- ignition
- transistor
- output
- drive 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
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 238000010926 purge Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 5
- 230000005856 abnormality Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 description 20
- 239000003990 capacitor Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 238000013021 overheating Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
Description
【発明の詳細な説明】
本発明は点火燃焼のために重要なトランジスタ
の異常を点検し、異常時には点火燃焼を行なわせ
ないようにする燃焼制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion control device that checks for abnormalities in transistors important for ignition combustion and prevents ignition combustion from occurring in the event of an abnormality.
一般にガス等の燃焼制御装置の安全回路として
は故障しても安全側に作用するフエールセイフの
考え方があるが、この方法ではオンオフするトラ
ンジスタの導通、非導通を直接点検する事ができ
ず、異常燃焼による過熱又はガス漏れを事前に防
止する事は難しい。 In general, there is a fail-safe concept for safety circuits in combustion control devices for gases, etc., which works safely even if there is a failure, but with this method, it is not possible to directly check whether the transistors that turn on and off are conductive or non-conductive. It is difficult to prevent overheating or gas leakage due to combustion in advance.
本発明は点火燃焼のために重要なトランジスタ
の導通、非導通を直接点検して過熱やガス漏れを
事前に防止する燃焼制御装置を提供するものであ
る。 The present invention provides a combustion control device that prevents overheating and gas leakage by directly inspecting conduction and non-conduction of transistors, which are important for ignition combustion.
図は本発明の一実施例を示す燃焼制御装置の回
路図である。図に於いてACは商用の交流電源
で、電源スイツチSWを介してフアンモータFM
やトランスＴ整流回路DC１及びハイリミツトス
イツチHLに供給される。つまり電源スイツチSW
をオンにするとフアンモータFMは始動し、整流
回路Ｒ１から正の電圧が制御回路１及び抵抗Ｒ１
を介して炎検出回路２、第１、第２の点検回路
３，４、プリパージ用のタイマー回路５及び強制
点火回路６に与えられる。ツエナーダイオード
ZDは抵抗Ｒ１の出力端子電圧を一定にする定電
圧用の素子です。制御回路１の出力は主駆動回路
７と点火駆動回路８とに供給されるので、制御回
路１が動作時のみ主駆動回路７及び点火駆動回路
８は能動状態となる。さらに主駆動回路７及び点
火駆動回路８には抵抗Ｒ１の出力が抵抗Ｒ２ダイ
オードＤ１を介して供給されている。OP１〜OP
４は比較器である。 The figure is a circuit diagram of a combustion control device showing one embodiment of the present invention. In the figure, AC is a commercial alternating current power supply, and the fan motor FM is connected via the power switch SW.
It is also supplied to the transformer T rectifier circuit DC1 and high limit switch HL. In other words, the power switch SW
When turned on, the fan motor FM starts, and a positive voltage is applied from the rectifier circuit R1 to the control circuit 1 and the resistor R1.
The signal is supplied to the flame detection circuit 2, the first and second inspection circuits 3 and 4, the pre-purge timer circuit 5, and the forced ignition circuit 6 via the circuit. zener diode
ZD is a constant voltage element that keeps the output terminal voltage of resistor R1 constant. Since the output of the control circuit 1 is supplied to the main drive circuit 7 and the ignition drive circuit 8, the main drive circuit 7 and the ignition drive circuit 8 are in an active state only when the control circuit 1 is in operation. Furthermore, the output of the resistor R1 is supplied to the main drive circuit 7 and the ignition drive circuit 8 via a resistor R2 and a diode D1. OP1～OP
4 is a comparator.
上記ハイリミツトスイツチHLにはリレー接点
７Ｓ，８Ｓが接続されており、リレー接点７Ｓは
主駆動回路７のリレーコイル７Ｌによつてオンさ
れ、リレー接点８Ｓは点火駆動回路８のリレーコ
イル８Ｌによつてオンにされる。リレー接点７Ｓ
がオンになると整流器DC２の出力によつて燃焼
用の電磁弁SVが駆動されて弁が開く。リレー接
点８Ｓがオンになると点火回路９が駆動されて火
花が発生する。このため電源スイツチSWをオン
にしても制御回路１が不動作で主駆動回路７及び
点火駆動回路８が非能動状態の時にはリレー接点
７Ｓ，８Ｓは開放されているので点火燃焼は行な
われない。 Relay contacts 7S and 8S are connected to the high limit switch HL, the relay contact 7S is turned on by the relay coil 7L of the main drive circuit 7, and the relay contact 8S is turned on by the relay coil 8L of the ignition drive circuit 8. It turns on. Relay contact 7S
When turned on, the combustion solenoid valve SV is driven by the output of the rectifier DC2, and the valve opens. When the relay contact 8S is turned on, the ignition circuit 9 is driven and a spark is generated. Therefore, even if the power switch SW is turned on, when the control circuit 1 is inactive and the main drive circuit 7 and the ignition drive circuit 8 are inactive, the relay contacts 7S and 8S are open, so ignition combustion does not occur.
次に動作について説明する。電源スイツチSW
をオンにすると上記した如くフアンモータFMが
始動し整流器DC１の出力によつて炎検出回路２
第１、第２点検回路３，４プリパージ用のタイマ
ー回路５及び強制点火回路６が動作する。この時
第１、第２点検回路３，４の出力が高電位でもプ
リパージ用のタイマー回路５の出力が低電位のた
め制御回路１の抵抗３の端子出力は低電位にな
り、制御回路１のトランジスタTr１はオンし、
トランジスタTr２はオフとなり制御回路１は不
動作となる。このため電源スイツチSWがオン
で、ハイリミツトスイツチHLを介してリレー接
点７Ｓ，８Ｓに交流が供給されてもリレー接点７
Ｓ，８Ｓが開なので点火燃焼は行なわれない。 Next, the operation will be explained. Power switch SW
When turned on, the fan motor FM starts as described above and the flame detection circuit 2 is activated by the output of the rectifier DC1.
The first and second inspection circuits 3 and 4, the pre-purge timer circuit 5, and the forced ignition circuit 6 operate. At this time, even if the outputs of the first and second inspection circuits 3 and 4 are at a high potential, the output of the pre-purge timer circuit 5 is at a low potential, so the terminal output of the resistor 3 of the control circuit 1 becomes a low potential. Transistor Tr1 turns on,
The transistor Tr2 is turned off and the control circuit 1 becomes inoperable. Therefore, even if power switch SW is on and AC is supplied to relay contacts 7S and 8S via high limit switch HL, relay contact 7
Since S and 8S are open, ignition combustion is not performed.
上記プリパージ用のタイマー回路５は抵抗Ｒ４
コンデンサＣ１による時定数のタイマー回路であ
り、例えば５秒間で出力が低電位から高電位に変
り、第１、第２点検回路３，４が高電位出力なら
ばトランジスタTr１をオフにし、トランジスタ
Tr２をオンにして主駆動回路７及び点火駆動回
路８が能動状態になる。このため強制点火回路６
が電源スイツチSWのオン後に高電位出力である
と点火駆動回路８のトランジスタTr３がオン
し、リレーコイル８Ｌがリレー接点８Ｓをオンに
して点火回路９が作動し、火花が発生する。つま
りパイロツトバーナ（図示せず）の点火動作が行
なわれる。強制点火回路６も抵抗Ｒ５コンデンサ
Ｃ２で決まる時定数のタイマー回路であり、一定
時間例えば40秒間高電位を出力して点火動作を行
なわせる。ただし、制御回路１の出力が発生しな
いと抵抗Ｒ６には正電位が与えられないので強制
点火回路６の出力は高電位とならない。つまり上
記プリパージ動作中は点火動作は行なわれず、上
記のフアンモータFMのみが動作している。 The above pre-purge timer circuit 5 is a resistor R4
This is a time constant timer circuit using a capacitor C1. For example, if the output changes from a low potential to a high potential in 5 seconds and the first and second inspection circuits 3 and 4 output a high potential, the transistor Tr1 is turned off and the transistor Tr1 is turned off.
By turning on Tr2, the main drive circuit 7 and the ignition drive circuit 8 become active. For this reason, the forced ignition circuit 6
If it is a high potential output after the power switch SW is turned on, the transistor Tr3 of the ignition drive circuit 8 is turned on, the relay coil 8L turns on the relay contact 8S, the ignition circuit 9 is activated, and a spark is generated. That is, the pilot burner (not shown) is ignited. The forced ignition circuit 6 is also a timer circuit with a time constant determined by a resistor R5 and a capacitor C2, and outputs a high potential for a certain period of time, for example, 40 seconds to perform an ignition operation. However, unless the output of the control circuit 1 is generated, a positive potential is not applied to the resistor R6, so the output of the forced ignition circuit 6 does not become a high potential. In other words, during the prepurge operation, no ignition operation is performed, and only the fan motor FM is in operation.
点火回路９の火花によつて点火すると炎検出回
路２によつて炎が有る事が確認され、電界効果型
トランジスタ（以下FETと称す）Ｆ１はオフに
なり抵抗Ｒ７を介して高電位が主駆動回路７のダ
イオードＤ２抵抗Ｒ８を通じトランジスタTr４
のベースに与えられ、トランジスタTr４が導通
してリレーコイル７Ｌを動作し、リレー接点７Ｓ
をオンにする。このため炎が確認されると電磁弁
SVが動作してメインバーナ（図示せず）からガ
スが放出され、パイロツトバーナの炎によつて点
火燃焼する。 When ignited by a spark from the ignition circuit 9, the presence of a flame is confirmed by the flame detection circuit 2, and the field effect transistor (hereinafter referred to as FET) F1 is turned off, and the high potential is used as the main drive via the resistor R7. Transistor Tr4 through diode D2 and resistor R8 of circuit 7
The transistor Tr4 conducts to operate the relay coil 7L, and the relay contact 7S
Turn on. Therefore, if a flame is detected, the solenoid valve
When the SV operates, gas is released from the main burner (not shown) and is ignited and burned by the pilot burner's flame.
上記第１点検回路３は上記プリパージ動作中に
炎検出回路２のFET Ｆ１の不導通を点検するも
ので、第２の点検回路４はプリパージ動作中に主
駆動回路７と点火駆動回路８のトランジスタTr
４，Tr３の導通を点検するものであり、いずれ
も正常の場合には高電位の出力が発生する。 The first inspection circuit 3 checks for non-conductivity of the FET F1 of the flame detection circuit 2 during the prepurge operation, and the second inspection circuit 4 checks the transistors of the main drive circuit 7 and the ignition drive circuit 8 during the prepurge operation. Tr
4. This is to check the continuity of Tr3, and if both are normal, a high potential output will be generated.
まず第１点検回路３はプリパージ中の場合には
炎が無いので、FET Ｆ１はオンしてダイオード
３，Ｄ４への出力は低電位となるはずなのに高電
位の場合にはFET Ｆ１が炎がないのに開放され
たと判断するもので、高電位がダイオードＤ３を
介してコンデンサＣ３に供給されると瞬時にコン
デンサＣ３を充電して出力を高電位から低電位に
変更させる。出力が低電位になるとプリパージ終
了後プリパージ用のタイマー回路５の出力が高電
位となつても制御回路１の入力は低電位となつて
制御回路１は不動作のままとなるFET Ｆ１から
の高電位がない場合でも抵抗Ｒ９コンデンサＣ３
の時定数によつて出力が低電位に変更されるが、
炎が有る場合にはトランジスタTr４がオンする
のでダイオードＤ４を介してコンデンサＣ３の電
荷は放電され、高電位出力を維持する。 First, in the first inspection circuit 3, there is no flame during pre-purging, so FET F1 should be turned on and the output to diode 3 and D4 should be at a low potential, but when the potential is high, there is no flame in FET F1. When a high potential is supplied to the capacitor C3 via the diode D3, the capacitor C3 is instantly charged and the output is changed from high potential to low potential. When the output becomes a low potential, the input of the control circuit 1 becomes a low potential and the control circuit 1 remains inoperable even if the output of the prepurge timer circuit 5 becomes a high potential after the prepurge is completed. Resistor R9 Capacitor C3 even when there is no potential
The output is changed to a low potential by the time constant of
When there is a flame, the transistor Tr4 is turned on, so that the charge in the capacitor C3 is discharged via the diode D4, maintaining a high potential output.
第２の点検回路４は抵抗Ｒ２ダイオードＤ１
と、主駆動回路７及び点火駆動回路８のダイオー
ドＤ５，Ｄ６を介してトランジスタTr４，TR３
に与えられる正電位が高電位のままか、トランジ
スタTr４，Tr３が導通して低電位となつている
か否かを判定するものである。トランジスタTr
４，Tr３のゲート入力にはプリパージ中制御回
路１が不動作のため抵抗Ｒ１０，Ｒ６を介して正
電位が与えられず、正常な場合には不導通とな
る。万一故障によつて導通するとダイオードＤ
５，Ｄ６のいずれかを介して第２の点検回路４へ
の入力が低電位となるのでその出力は高電位から
低電位に変り、プリパージが終つても制御回路１
を不動作にする。 The second inspection circuit 4 has a resistor R2 and a diode D1.
and transistors Tr4 and TR3 via diodes D5 and D6 of the main drive circuit 7 and ignition drive circuit 8.
It is determined whether the positive potential applied to remains at a high potential or whether the transistors Tr4 and Tr3 are conductive and have a low potential. Transistor Tr
4. Since the control circuit 1 is inactive during prepurge, a positive potential is not applied to the gate input of Tr3 via the resistors R10 and R6, and the gate input of Tr3 becomes non-conductive in a normal state. If it becomes conductive due to a failure, diode D
5 and D6, the input to the second inspection circuit 4 becomes a low potential, so its output changes from a high potential to a low potential, and even after the prepurge is finished, the control circuit 1
make it inoperable.
上記の第１、第２の点検回路３，４によつて上
記のFET Ｆ１及びトランジスタTr４，Tr３の
いずれもが正常であると判定された場合にはプリ
パージ終了後、プリパージ用のタイマー回路５が
高電位出力となると制御回路１への入力が高電位
となり、第２点検回路４のトランジスタTr５が
導通して抵抗Ｒ１１による比較器OP２の負入力
をアース電位にするので、第２点検回路４の出力
は以後高電位に固定される。 If the first and second inspection circuits 3 and 4 determine that both the FET F1 and the transistors Tr4 and Tr3 are normal, the pre-purge timer circuit 5 is activated after the pre-purge is completed. When a high potential output occurs, the input to the control circuit 1 becomes a high potential, transistor Tr5 of the second check circuit 4 becomes conductive, and the negative input of the comparator OP2 by the resistor R11 is brought to ground potential. The output is then fixed at a high potential.
上記の動作によつて第１、第２点検回路３，４
はプリパージ中にFET Ｆ１の不導通、トランジ
スタTr４，Tr３の導通が点検され、正常な場合
にはプリパージ終了後第２の点検回路４が高電位
に固定され、炎が検出されると第１点検回路３が
高電位に固定されるので、正常な場合にはプリパ
ージ用のタイマー回路５及び強制点火回路６のみ
の回路動作と同一となる。 By the above operation, the first and second inspection circuits 3 and 4
During prepurge, non-conduction of FET F1 and conduction of transistors Tr4 and Tr3 are checked. If normal, the second inspection circuit 4 is fixed at a high potential after the completion of prepurge, and if a flame is detected, the first inspection is performed. Since the circuit 3 is fixed at a high potential, under normal conditions, the circuit operation is the same as that of only the pre-purge timer circuit 5 and the forced ignition circuit 6.
上記の例ではプリパージのタイマー回路５の出
力に並列に第１、第２点検回路３，４の出力を設
けているが、プリパージ用のタイマー回路５のコ
ンデンサＣ１を短絡させるとプリパージ用のタイ
マー回路５の出力は低電位に固定されるので、コ
ンデンサＣ１に並列に短絡用のトランジスタを配
置し、そのトランジスタを第１、第２点検回路
３，４の低電位出力で導通させる事によつて、
FET Ｆ１又はトランジスタTr４，Tr３の異常
の場合に制御回路１を不動作とする事ができる。
この場合には第１、第２点検回路３，４とプリパ
ージ回路とを直列に接続した事になる。又同様に
動作する回路として抵抗Ｒ４と抵抗Ｒ１間に第
１、第２点検回路３，４の低電位出力によつて不
導通となるトランジスタを設ける事が考えられ、
その回路によつてプリパージ用タイマー回路５の
タイマー動作を禁止するようにしても良い。 In the above example, the outputs of the first and second inspection circuits 3 and 4 are provided in parallel with the output of the pre-purge timer circuit 5, but if the capacitor C1 of the pre-purge timer circuit 5 is short-circuited, the pre-purge timer circuit Since the output of 5 is fixed at a low potential, by placing a shorting transistor in parallel with the capacitor C1 and making the transistor conductive with the low potential outputs of the first and second inspection circuits 3 and 4,
The control circuit 1 can be rendered inoperable in the event of an abnormality in the FET F1 or the transistors Tr4 and Tr3.
In this case, the first and second inspection circuits 3 and 4 and the prepurge circuit are connected in series. It is also conceivable to provide a transistor that becomes non-conductive due to the low potential output of the first and second inspection circuits 3 and 4 between the resistor R4 and the resistor R1 as a circuit that operates in the same manner.
The circuit may prohibit the timer operation of the prepurge timer circuit 5.
上記例ではFET Ｆ１及びトランジスタTr４，
Tr３の正常か否かを判定しているが、必要に応
じてFETのみやトランジスタTr４，Tr３のみで
も、トランジスタTr４，Tr３のいずれか一方の
みでも良い。 In the above example, FET F1 and transistor Tr4,
Although it is determined whether Tr3 is normal or not, it is also possible to use only the FET, only the transistors Tr4 and Tr3, or only one of the transistors Tr4 and Tr3, if necessary.
また上記例では強制点火回路６を電源スイツチ
SWのオン後直ちに動作させているが、制御回路
１の出力によつて動作させても良い。 In addition, in the above example, the forced ignition circuit 6 is turned on by the power switch.
Although it is operated immediately after turning on the SW, it may also be operated by the output of the control circuit 1.
以上の如く、本発明は燃料供給用の駆動回路及
び点火のための駆動回路を制御回路によつて能動
状態にする燃焼制御装置に於いて、制御回路を電
源オン時所定時間不動作にするプリパージ用のタ
イマー回路に、炎を検出する回路のトランジスタ
の不導通をチエツクする回路又は燃料供給用の駆
動回路のトランジスタ若しくは点火駆動回路のト
ランジスタの導通をチエツクする回路を設け、ト
ランジスタの異常時にはタイマー回路の不動作解
除後も制御回路を不動作とするもので、トランジ
スタが動作していないプリパージ動作中に点検を
行なうので確実に不良を点検する事ができ、過熱
やガス漏れは皆無となるし、さらに上記電界効果
トランジスタが正常な場合はプリパージ中に炎が
有るか否かを判定する事が出来るので、万一再点
火の際に炎があれば異常だと判定して以後の動作
を不動作とする事ができる。 As described above, the present invention provides a combustion control device in which a drive circuit for fuel supply and a drive circuit for ignition are made active by a control circuit, and a pre-purge that makes the control circuit inactive for a predetermined period of time when the power is turned on. The timer circuit for this purpose is equipped with a circuit that checks for non-conductivity of the transistor in the flame detection circuit, a circuit that checks the continuity of the transistor in the fuel supply drive circuit, or the transistor in the ignition drive circuit, and when the transistor is abnormal, the timer circuit is activated. The control circuit remains inactive even after the transistor is deactivated, and the inspection is performed during the pre-purge operation when the transistor is not operating, so defects can be reliably detected and there will be no overheating or gas leaks. Furthermore, if the above field effect transistor is normal, it is possible to determine whether or not there is a flame during pre-purge, so if there is a flame during re-ignition, it will be determined to be abnormal and subsequent operations will be disabled. It is possible to do this.
図は本発明の一実施例を示す燃焼制御装置の回
路図である。図に於いて、１は制御回路、２は炎
検出回路、３は第１の点検回路、４は第２の点検
回路、５はプリパージ用のタイマー回路、６は強
制点火回路、７は燃料供給用の主駆動回路、８は
点火駆動回路、９は点火回路である。
The figure is a circuit diagram of a combustion control device showing one embodiment of the present invention. In the figure, 1 is a control circuit, 2 is a flame detection circuit, 3 is a first inspection circuit, 4 is a second inspection circuit, 5 is a pre-purge timer circuit, 6 is a forced ignition circuit, and 7 is a fuel supply circuit. 8 is an ignition drive circuit, and 9 is an ignition circuit.
Claims (1)
回路を制御回路によつて能動状態にする燃焼制御
装置に於いて、制御回路を電源オン後所定時間不
動作にするプリパージ用のタイマー回路に、炎を
検出する回路のトランジスタの不導通をチエツク
する回路又は燃料供給用の駆動回路のトランジス
タ若しくは点火駆動回路のトランジスタの導通チ
エツクする回路を設け、トランジスタの異常時に
はタイマー回路の不動作解除後も制御回路を不動
作とし、点火燃焼を禁止する事を特徴とした燃焼
制御装置。1. In a combustion control device in which a drive circuit for fuel supply and a drive circuit for ignition are activated by a control circuit, a timer circuit for pre-purge that makes the control circuit inactive for a predetermined period of time after the power is turned on, A circuit is installed to check the non-continuity of the transistor in the flame detection circuit, the transistor in the fuel supply drive circuit, or the transistor in the ignition drive circuit, and in the event of a transistor abnormality, the control can be performed even after the timer circuit is released from operation. A combustion control device that disables the circuit and prohibits ignition combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3075780A JPS56127123A (en) | 1980-03-10 | 1980-03-10 | Combustion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3075780A JPS56127123A (en) | 1980-03-10 | 1980-03-10 | Combustion control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56127123A JPS56127123A (en) | 1981-10-05 |
| JPS6139572B2 true JPS6139572B2 (en) | 1986-09-04 |
Family
ID=12312552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3075780A Granted JPS56127123A (en) | 1980-03-10 | 1980-03-10 | Combustion control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56127123A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6237621A (en) * | 1985-08-10 | 1987-02-18 | Sanyo Electric Co Ltd | Combustion controller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51104642A (en) * | 1975-03-12 | 1976-09-16 | Mitsubishi Electric Corp | NENSHOBAANASEIGYO SOCHI |
| JPS5228731A (en) * | 1975-08-29 | 1977-03-03 | Nippon Gakki Seizo Kk | Flame checking out and controlling equipment for a burner |
| JPS54153338A (en) * | 1978-05-25 | 1979-12-03 | Sharp Corp | Control device for stress ventilation combustion unit |
| JPS54154835A (en) * | 1978-05-27 | 1979-12-06 | Omron Tateisi Electronics Co | Combustion controller |
-
1980
- 1980-03-10 JP JP3075780A patent/JPS56127123A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51104642A (en) * | 1975-03-12 | 1976-09-16 | Mitsubishi Electric Corp | NENSHOBAANASEIGYO SOCHI |
| JPS5228731A (en) * | 1975-08-29 | 1977-03-03 | Nippon Gakki Seizo Kk | Flame checking out and controlling equipment for a burner |
| JPS54153338A (en) * | 1978-05-25 | 1979-12-03 | Sharp Corp | Control device for stress ventilation combustion unit |
| JPS54154835A (en) * | 1978-05-27 | 1979-12-06 | Omron Tateisi Electronics Co | Combustion controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56127123A (en) | 1981-10-05 |
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