JPH06100332B2 - Combustion control device - Google Patents
Combustion control deviceInfo
- Publication number
- JPH06100332B2 JPH06100332B2 JP24751388A JP24751388A JPH06100332B2 JP H06100332 B2 JPH06100332 B2 JP H06100332B2 JP 24751388 A JP24751388 A JP 24751388A JP 24751388 A JP24751388 A JP 24751388A JP H06100332 B2 JPH06100332 B2 JP H06100332B2
- Authority
- JP
- Japan
- Prior art keywords
- shutter
- discharge
- ultraviolet detector
- combustion
- flame
- 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 - Lifetime
Links
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
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
- F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Control Of Combustion (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は燃焼室に設けられた燃焼手段からの火炎を検
出し、この火炎検出信号に基づいて上記燃焼手段の燃焼
を制御する燃焼制御装置に関するものである。Description: [Industrial field of application] The present invention detects a flame from a combustion means provided in a combustion chamber and controls combustion of the combustion means based on the flame detection signal. It is about.
従来、この種の燃焼制御装置においては、火炎を検出す
る火炎検出手段として火炎の紫外線を検出する紫外線検
出器を用いている。Conventionally, in this type of combustion control device, an ultraviolet ray detector that detects ultraviolet rays of a flame is used as flame detecting means that detects a flame.
第７図は上記紫外線検出器を示す縦断面図である。第７
図に示す紫外線検出器は、特定ガスを封入したガラス管
31内に陰極32と陽極33を設け、この両極間に外部電源
（図示せず）から電圧を印加する。FIG. 7 is a vertical sectional view showing the ultraviolet detector. 7th
The UV detector shown in the figure is a glass tube filled with a specific gas.
A cathode 32 and an anode 33 are provided in 31 and a voltage is applied between these electrodes from an external power source (not shown).
この電圧を印加した状態において、火炎から発生する紫
外線が照射されると、陰極32から光電子が放出し、この
光電子がガラス管31内のガス分子と衝突、電離を繰返
し、ガス倍増されて陰極32と陽極33の間に放電電流が流
れ、この放電電流によって火炎のあることが検出され
る。In the state where this voltage is applied, when the ultraviolet rays generated from the flame are irradiated, photoelectrons are emitted from the cathode 32, and the photoelectrons collide with gas molecules in the glass tube 31 and are repeatedly ionized, and the gas is doubled to form the cathode 32. A discharge current flows between the anode 33 and the anode 33, and the presence of flame is detected by this discharge current.
この紫外線検出器は１つの故障モードとして、紫外線
（火炎）がなくても放電する自己放電現象があり、この
自己放電時と火炎検出放電時とでは放電現象に差がな
い。This ultraviolet ray detector has, as one failure mode, a self-discharge phenomenon of discharging even without ultraviolet rays (flame), and there is no difference in the discharge phenomenon between this self-discharge and the flame detection discharge.
このため、紫外線検出器からの火炎検出信号に基づいて
燃焼を制御する燃焼制御手段は、自己放電が燃焼途中で
生ずると、万一、火が消えても消炎に気付かず、燃料弁
を閉じる信号を出さないことになり、非常に危険であ
る。Therefore, the combustion control means for controlling the combustion based on the flame detection signal from the ultraviolet detector, if self-discharge occurs during the combustion, even if the fire is extinguished, even if the fire is extinguished, it will not notice the extinction and a signal to close the fuel valve. Will not be issued and is very dangerous.
そこで、この対策として、燃焼手段と紫外線検出器の間
を間欠的に遮断し、火が見えなくなったならば紫外線検
出器の放電電流も停止することを確認するシステムの燃
焼制御装置がある。Therefore, as a countermeasure against this, there is a combustion control device of a system that intermittently cuts off between the combustion means and the ultraviolet detector and confirms that the discharge current of the ultraviolet detector is also stopped when the fire disappears.
第８図は従来の上記燃焼制御装置を示すブロック図であ
り、第８図において、１は燃焼手段としてのバーナ、２
は火炎３を検出する紫外線検出器、４はバーナ１と紫外
線検出器２との間に配設したシャッタ、５は紫外線検出
器２からの放電パルスを積分して設定値と比較する第１
の比較回路、６は積分回路５の出力信号に基づいてシャ
ッタ４を駆動するシャッタ駆動回路、７はシャッタ４の
閉じ時間が設定時間を越えたとき警報信号を出力する第
２の比較回路である。FIG. 8 is a block diagram showing the above-mentioned conventional combustion control device. In FIG. 8, 1 is a burner as a combustion means, and 2 is a burner.
Is an ultraviolet detector for detecting the flame 3, 4 is a shutter arranged between the burner 1 and the ultraviolet detector 2, and 5 is a shutter for integrating the discharge pulse from the ultraviolet detector 2 and comparing it with a set value.
6 is a shutter drive circuit that drives the shutter 4 based on the output signal of the integration circuit 5, and 7 is a second comparison circuit that outputs an alarm signal when the closing time of the shutter 4 exceeds a set time. .
第９図は上記第８図の一部を更に詳細に示すブロック図
であり、上記第１の比較回路５は、紫外線検出器２から
の放電パルスを積分する積分器5a、この積分器5aの積分
値と高位設定値Vcを比較する比較器5b、積分器5aの積分
値と低位設定値Vcoを比較する比較器5cを有する。ま
た、上記第２の比較回路７は積分器5aの積分値が高位設
定値Vcから低位設定値Vcoに変化するまでの時間を計測
する計測器7a、この計測器7aの計測時間ｔと設定時間tc
を比較する比較器7bを有する。FIG. 9 is a block diagram showing a part of FIG. 8 in more detail. The first comparison circuit 5 includes an integrator 5a for integrating the discharge pulse from the ultraviolet detector 2 and the integrator 5a. It has a comparator 5b for comparing the integrated value and the high set value V c, and a comparator 5c for comparing the integrated value of the integrator 5a and the low set value V co . The second comparison circuit 7 measures the time until the integrated value of the integrator 5a changes from the high-order set value V c to the low-order set value V co , and the measurement time t of the measurer 7a. Set time t c
It has a comparator 7b for comparing.
次に動作を第10図の信号波形図を参照しながら説明す
る。定常燃焼時にシャッタ４が開くと、火炎を検出した
紫外線検出器２からの放電パルスを積分器5aで積分し、
この積分値が高位設定値Vcに達すると、比較器5bからの
出力信号でシャッタ駆動回路６を作動させ、シャッタ４
を閉じる。Next, the operation will be described with reference to the signal waveform diagram of FIG. When the shutter 4 opens during steady combustion, the integrator 5a integrates the discharge pulse from the ultraviolet ray detector 2 that has detected the flame,
When this integrated value reaches the high set value V c , the shutter drive circuit 6 is operated by the output signal from the comparator 5b, and the shutter 4
Close.
シャッタ４が閉じると、紫外線検出器２は火炎を検出で
きなくなり、積分器5aは紫外線検出器２からの放電パル
スのストップで積分値が減少し、低位設定値Vcoに達す
ると、比較器5cからの出力信号でシャッタ駆動回路６を
作動させ、シャッタを開く。シャッタ４が開くと、紫外
線検出器２は再び火災の検出を行い、以下、上記一連の
シャッタ開閉動作が繰返される。When the shutter 4 is closed, the ultraviolet detector 2 cannot detect the flame, and the integrator 5a has its integrated value reduced by the stop of the discharge pulse from the ultraviolet detector 2 and reaches the low set value V co. The shutter drive circuit 6 is actuated by the output signal from to open the shutter. When the shutter 4 is opened, the ultraviolet ray detector 2 detects the fire again, and the series of shutter opening / closing operations is repeated.
この場合、紫外線検出器２が正常であれば、積分器5aの
積分値が高位設定値Vcから低位設定値Vcoに変化するま
での時間は、時間t1，t2，t3のようにほぼ一定である。In this case, if the ultraviolet detector 2 is normal, the time required for the integrated value of the integrator 5a to change from the high-order set value V c to the low-order set value V co is as shown by times t 1 , t 2 , and t 3 . Is almost constant.
ところが、紫外線検出器２が劣化してくると、シャッタ
４が閉じていて、火炎を検出できない状態であっても、
自己放電を起こして放電パルスを出すようになる。この
ため、積分器5aの積分値が低位設定値Vcoまで減少する
に要する時間が時間t4のように設定時間tcより長くな
る。この結果、比較器7bから警報信号を出力し、紫外線
検出器２の劣化を報知する。However, when the ultraviolet detector 2 deteriorates, even if the shutter 4 is closed and the flame cannot be detected,
Self-discharge occurs and discharge pulse is generated. Therefore, the time required for the integrated value of the integrator 5a to decrease to the lower set value V co becomes longer than the set time t c as the time t 4 . As a result, an alarm signal is output from the comparator 7b to notify the deterioration of the ultraviolet ray detector 2.
従来の燃焼制御装置は以上のように構成されているの
で、紫外線検出器の劣化に至る前兆現象を適確に検知す
ることが困難である。Since the conventional combustion control device is configured as described above, it is difficult to accurately detect the precursory phenomenon that leads to deterioration of the ultraviolet detector.
つまり、紫外線検出器が劣化して自己放電を起こすの
は、全ての状態について徐々に放電回数が増大するので
はなく、放電発生頻度の高い状態の群れの数が徐々に増
えるため、積分器の積分値が高位設定値から低位設定値
に変化するまでの時間と設定時間との比較結果によっ
て、紫外線検出器の劣化を判断する従来装置では、この
群れの発生が連続に近くならないと警報信号の出力とな
らず、自己放電に近づいたことを報知することが困難で
あるという問題点があった。In other words, the reason why the ultraviolet detector deteriorates and causes self-discharge is that the number of discharges does not increase gradually in all the states, but the number of groups in a state where discharge occurrence frequency is high gradually increases. In the conventional device that determines the deterioration of the ultraviolet detector based on the result of comparison between the set time and the time required for the integrated value to change from the high set value to the low set value, the warning signal of the alarm signal must be generated unless the occurrence of this swarm is close to continuous. There is a problem that it is difficult to notify that the self-discharge is approaching because the output is not output.
この発明は上記のような問題点を解消するためになされ
たもので、紫外線検出器の自己放電の前兆現象を検知し
て、適確な燃焼制御を行なうことのできる燃焼制御装置
を得ることを目的とする。The present invention has been made to solve the above problems, and it is an object of the present invention to obtain a combustion control device capable of performing proper combustion control by detecting a precursory phenomenon of self-discharge of an ultraviolet detector. To aim.
この発明に係る燃焼制御装置は、燃焼手段と紫外線検出
器の間を開閉するシャッタの閉じているときの該紫外線
検出器の放電を計測し、この放電の間隔が設定値以内で
あることを判断して警報信号を出力する警報信号出力手
段を具備したものである。The combustion control device according to the present invention measures the discharge of the ultraviolet detector when the shutter that opens and closes between the combustion means and the ultraviolet detector is closed, and determines that the discharge interval is within a set value. Then, an alarm signal output means for outputting an alarm signal is provided.
この発明における燃焼制御装置は、紫外線検出器の放電
間隔が設定値以内であることを判断して警報信号を出力
することにより、紫外線検出器の自己放電の前兆現象を
検出することができ、適確な燃焼制御によって危険を防
止する。The combustion control device according to the present invention can detect the precursory phenomenon of self-discharge of the ultraviolet detector by determining that the discharge interval of the ultraviolet detector is within the set value and outputting an alarm signal. Danger is prevented by accurate combustion control.
以下、この発明の実施例を図面について説明する。前記
第８図と同一部分に同一符号を付した第１図において、
８は紫外線検出器２からの検出信号を入力して火炎を検
出する火炎検出回路であり、この火炎検出回路８は紫外
線検出器２の駆動回路９と該駆動回路から発生するフレ
ーム電流を検出するフレーム電流検出回路10とで構成さ
れている。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 in which the same parts as those in FIG.
Reference numeral 8 denotes a flame detection circuit that receives a detection signal from the ultraviolet detector 2 and detects a flame. The flame detection circuit 8 detects a drive circuit 9 of the ultraviolet detector 2 and a frame current generated from the drive circuit. It is composed of a frame current detection circuit 10.
11は火炎検出回路８の出力信号に基づいてバーナ１を制
御する燃焼制御手段、12は比較回路、13は波形整形回
路、14はシャッタ４の閉じているときの前記紫外線検出
器２の放電を計測し該放電の間隔が設定値以内であるこ
とを判断して警報信号を出力する警報信号出力手段とし
てのマイコンである。Reference numeral 11 is combustion control means for controlling the burner 1 based on the output signal of the flame detection circuit 8, 12 is a comparison circuit, 13 is a waveform shaping circuit, and 14 is discharge of the ultraviolet detector 2 when the shutter 4 is closed. It is a microcomputer as an alarm signal output means for measuring and determining that the discharge interval is within a set value and outputting an alarm signal.
次に動作について説明する。定常燃焼時にシャッタ４が
開くと、紫外線検出器２からの検出信号に基づいて、火
炎検出回路８から火炎検出信号が出力され、この火炎検
出信号で燃焼制御手段11を介してバーナ１を制御すると
ともにシャッタ駆動回路６を作動させる。Next, the operation will be described. When the shutter 4 opens during steady combustion, a flame detection signal is output from the flame detection circuit 8 based on the detection signal from the ultraviolet detector 2, and the burner 1 is controlled by this flame detection signal via the combustion control means 11. At the same time, the shutter drive circuit 6 is operated.
このシャッタ駆動回路６が作動すると、シャッタを閉じ
る。このため、紫外線検出器２からの検出信号がなくな
って、燃焼制御手段11、シャッタ駆動回路６への入力が
なくなり、シャッタ駆動回路６の不動作でシャッタ４を
開き、以下、この一連のシャッタ開閉動作が一定周期で
繰返される。この場合、シャッタ４の開閉周期は数秒程
度である。When the shutter drive circuit 6 operates, the shutter is closed. For this reason, the detection signal from the ultraviolet detector 2 disappears, the inputs to the combustion control means 11 and the shutter drive circuit 6 disappear, and the shutter 4 is opened by the shutter drive circuit 6 not operating. The operation is repeated at regular intervals. In this case, the opening / closing cycle of the shutter 4 is about several seconds.
上記シャッタ４の開閉動作時、紫外線検出器２は劣化し
ていなければ、第２図に示すように、シャッタ４の開時
にはほぼ一定の周期で放電パルスＰを出力し、シャッタ
４の閉時には全く放電パルスＰを出力しない。When the ultraviolet detector 2 is not deteriorated during the opening / closing operation of the shutter 4, as shown in FIG. 2, the discharge pulse P is output at a substantially constant period when the shutter 4 is opened, and when the shutter 4 is closed, there is no discharge pulse P. The discharge pulse P is not output.
ところが、紫外線検出器２が劣化してくると、第３図に
示すようにシャッタ４の閉時においても放電パルスPeが
生ずるようになる。However, when the ultraviolet detector 2 deteriorates, even so discharge pulse P e is generated in the closing of the shutter 4 as shown in Figure 3.
そこで、このシャッタ４の閉時に生じた放電パルスPeを
比較回路12,波形整形回路13を介してマイコン14に入力
する。マイコン14は入力された放電パルスPeのパルス間
隔Ｘをタイマカウンタによって計測し警報信号の出力を
判断する。Therefore, the discharge pulse P e generated when the shutter 4 is closed is input to the microcomputer 14 via the comparison circuit 12 and the waveform shaping circuit 13. The microcomputer 14 measures the pulse interval X of the input discharge pulse P e with a timer counter and determines the output of the alarm signal.
以下、第４図のフローチャート図に基づいて、マイコン
14の判断動作を説明する。ステップST1で判断動作をス
タートすると、Ｎ＝０とし（ステップST2）、シャッタ
４が閉か否かを判断する（ステップST3）。YESであれ
ば、ステップST4で放電パルスPeがあるか否かを判断
し、YESであれば、パルス間隔計測:Xを行う（ステップS
T5）。Below, based on the flowchart of FIG. 4, the microcomputer
The determination operation of 14 will be described. When the judgment operation is started in step ST1, N = 0 is set (step ST2), and it is judged whether or not the shutter 4 is closed (step ST3). If YES, the judgment whether or not there is a discharge pulse P e in step ST4, if YES, the pulse interval measuring: performing X (step S
T5).
次に、ステップST6でＮ＝Ｎ＋１とし、パルス数Ｎ≧N0
（設定値）であるか否かを判断し（ステップST7）、YES
であれば、パルス間隔の平均値と標準偏差σを演算す
る（ステップST8）。Next, in step ST6, N = N + 1 is set, and the number of pulses N ≧ N 0
It is determined whether or not it is (setting value) (step ST7), and YES
If so, the average value of the pulse intervals and the standard deviation σ are calculated (step ST8).
なお、上記ステップST3,ST4,ST7の判断において、NOの
場合は上記ステップST3からステップST7の動作を繰返
す。In addition, in the judgment of the steps ST3, ST4, ST7, if NO, the operations of the steps ST3 to ST7 are repeated.
一方、ステップST9で≦X0（設定値）の判断を行い、Y
ESであれば、ステップST10で警報を出力する。また、NO
であれば、ステップST11で≦X0＋ｄの判断を行い、YE
Sであれば、ステップST12でσ≦σ0の判断を行い、YES
であれば、ステップST10に至り警報を出力する。On the other hand, in step ST9, it is determined that ≦ X 0 (setting value), and Y
If it is ES, an alarm is output in step ST10. Also, NO
If so, it is determined in step ST11 that ≦ X 0 + d and YE
If S, it is determined in step ST12 that σ ≦ σ 0 and YES.
If so, an alarm is output in step ST10.
また、ステップST11,ST12でNOの場合は、いずれも前記
ステップST2から上記の動作を繰返すものである。If NO in steps ST11 and ST12, the above operation is repeated from step ST2.
なお、前記マイコン14に次のような判断を行わせてもよ
い。The microcomputer 14 may be made to make the following determination.
ａ）紫外線検出器２に至る火炎からの光をシャッタ４で
間欠的に遮断することを繰返す中で出てくるパルスを例
えば合計30個まで計測し、これ等のパルス間隔の度数分
布を第５図に示すように取って、この平均値又は の値が基準値以下となったとき、警報出力を出す。a) For example, up to 30 pulses in total are measured by repeating intermittently shutting off the light from the flame reaching the ultraviolet detector 2 with the shutter 4, and the frequency distribution of these pulse intervals is 5th. Take the average value or When the value of is below the reference value, an alarm output is issued.
また、第６図に示すように、短かい周期でシャッタの開
閉を行いながら、その中に一定周期毎に上記の判断を行
う放電パルス計測期間Ｔを設けてもよい。Further, as shown in FIG. 6, while the shutter is opened and closed in a short cycle, a discharge pulse measurement period T for making the above-mentioned determination in every fixed cycle may be provided therein.
このようにすれば、まれにパスル間隔の狭いものが発生
しても警報出力にはならず、誤報を防止できる。By doing so, even if a narrow pulse interval occurs in rare cases, no alarm is output and an erroneous alarm can be prevented.
ｂ）紫外線検出器２に至る火炎からの光を間欠的に２秒
間遮断することを例えば７回繰返し、この遮断中の放電
パルス数の合計が例えば48個以上のとき警報出力を出
す。b) Intermittently interrupting the light from the flame reaching the ultraviolet detector 2 for 2 seconds is repeated, for example, 7 times, and an alarm output is issued when the total number of discharge pulses during this interruption is, for example, 48 or more.
また、光を間欠的に２秒間遮断することを例えば７回繰
返し、それぞれの遮断中の放電回数の合計が４パルス/2
秒を越えることが７回中３回以上あるとき警報出力を出
す。Also, intermittently interrupting the light for 2 seconds is repeated, for example, 7 times, and the total number of discharges during each interrupt is 4 pulses / 2.
An alarm is output when the number of seconds exceeds three times out of seven times.
このようにすれば、まれに放電の発生頻度が増加して
も、警報出力にはならず誤報を防止できる。By doing so, even if the frequency of occurrence of discharge rarely increases, the alarm output does not occur and false alarms can be prevented.
ｃ）紫外線検出器２に至る火炎からの光をシャッタ４で
遮断したとき放電があれば、この放電の時間間隔が基準
値以下である場合、または、大小２つの基準値に挟まれ
た時間間隔の放電があった場合に出力信号を出す。c) If there is discharge when the light from the flame reaching the ultraviolet detector 2 is blocked by the shutter 4, if the time interval of this discharge is less than or equal to the reference value, or if the time interval is between two reference values, large and small. When there is a discharge of, an output signal is output.
そして、火炎からの光をシャッタ４で例えば７回遮断し
た場合に上記出力信号が例えば６回以上あったとき警報
出力を出す。このようにすれば、ノイズによる誤報を確
実に防止できる。Then, when the shutter 4 blocks the light from the flame 7 times, for example, when the output signal is 6 times or more, an alarm output is issued. In this way, false alarms due to noise can be reliably prevented.
以上のように、この発明によれば、火炎からの光を検出
する紫外線検出器の放電間隔が設定値以内であることを
判断して警報信号を出力するように構成したので、紫外
線検出器の自己放電の前兆現象を検出することができ、
劣化した紫外線検出器による誤検出を防止し、燃焼制御
を安全かつ正確に行うことができるという効果がある。As described above, according to the present invention, since it is configured to output an alarm signal by determining that the discharge interval of the ultraviolet detector for detecting the light from the flame is within a set value, the ultraviolet detector Can detect the precursory phenomenon of self-discharge,
There is an effect that erroneous detection due to a deteriorated ultraviolet ray detector can be prevented and combustion control can be performed safely and accurately.
第１図はこの発明の一実施例による燃焼制御装置を示す
ブロック図、第２図，第３図はシャッタの開閉に対する
放電電流の説明図、第４図は動作を説明するためのフロ
ーチャート図、第５図は放電パルス間隔の度数分布図、
第６図はシャッタ開閉動作の説明図、第７図は紫外線検
出器の縦断面図、第８図は従来の燃焼制御装置のブロッ
ク図、第９図は第８図の一部を更に詳細に示すブロック
図、第10図は従来装置の動作を説明する信号波形図であ
る。 １はバーナ（燃焼手段）、２は紫外線検出器、３は火
炎、４はシャッタ、６はシャッタ駆動回路、11は燃焼制
御手段、14はマイコン（警報信号出力手段）。FIG. 1 is a block diagram showing a combustion control device according to an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of discharge current with respect to opening and closing of a shutter, and FIG. 4 is a flow chart diagram for explaining operation. FIG. 5 is a frequency distribution chart of discharge pulse intervals,
FIG. 6 is an explanatory view of the shutter opening / closing operation, FIG. 7 is a vertical sectional view of an ultraviolet detector, FIG. 8 is a block diagram of a conventional combustion control device, and FIG. 9 is a part of FIG. 8 in more detail. The block diagram shown in FIG. 10 is a signal waveform diagram for explaining the operation of the conventional device. 1 is a burner (combustion means), 2 is an ultraviolet detector, 3 is flame, 4 is a shutter, 6 is a shutter drive circuit, 11 is combustion control means, and 14 is a microcomputer (alarm signal output means).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 諸星 征夫 神奈川県藤沢市川名１丁目12番２号 山武 ハネウエル株式会社藤沢工場内 (56)参考文献 特開 昭63−6425（ＪＰ，Ａ) 実開 昭50−122930（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Moroboshi 1-12-2 Kawana, Fujisawa-shi, Kanagawa Yamatake Honeywell Co., Ltd. Fujisawa Plant (56) Reference Japanese Patent Laid-Open No. 63-6425 (JP, A) 50-122930 (JP, U)
Claims (1)
手段から発生する火炎を検出する紫外線検出器と、前記
紫外線検出器からの火炎検出信号に基づいて前記燃焼手
段を制御する燃焼制御手段と、前記燃焼手段と前記紫外
線検出器の間を開閉するシャッタと、前記燃焼制御手段
から出力信号を受けて前記シャッタの開閉を制御するシ
ャッタ駆動回路と、前記シャッタの閉じているときの前
記紫外線検出器の放電を計測して放電間隔が設定値以内
であることを判断して警報信号を出力する警報信号出力
手段とを備えた燃焼制御装置。Claim: What is claimed is: 1. Combustion means provided in a combustion chamber, an ultraviolet detector for detecting a flame generated from the combustion means, and combustion control for controlling the combustion means based on a flame detection signal from the ultraviolet detector. Means, a shutter that opens and closes between the combustion means and the ultraviolet detector, a shutter drive circuit that controls the opening and closing of the shutter by receiving an output signal from the combustion control means, and the shutter when the shutter is closed. A combustion control device, comprising: an alarm signal output means for measuring the discharge of an ultraviolet detector, determining that the discharge interval is within a set value, and outputting an alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24751388A JPH06100332B2 (en) | 1988-10-03 | 1988-10-03 | Combustion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24751388A JPH06100332B2 (en) | 1988-10-03 | 1988-10-03 | Combustion control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0297823A JPH0297823A (en) | 1990-04-10 |
| JPH06100332B2 true JPH06100332B2 (en) | 1994-12-12 |
Family
ID=17164597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24751388A Expired - Lifetime JPH06100332B2 (en) | 1988-10-03 | 1988-10-03 | Combustion control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06100332B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6652266B1 (en) * | 2000-05-26 | 2003-11-25 | International Thermal Investments Ltd. | Flame sensor and method of using same |
| JP2008022682A (en) * | 2006-07-14 | 2008-01-31 | Yazaki Corp | Junction block |
| JP6036650B2 (en) * | 2013-11-06 | 2016-11-30 | Ｊｆｅスチール株式会社 | Flame monitoring device |
-
1988
- 1988-10-03 JP JP24751388A patent/JPH06100332B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0297823A (en) | 1990-04-10 |
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