JPH0297823A - Combustion controller - Google Patents
Combustion controllerInfo
- Publication number
- JPH0297823A JPH0297823A JP24751388A JP24751388A JPH0297823A JP H0297823 A JPH0297823 A JP H0297823A JP 24751388 A JP24751388 A JP 24751388A JP 24751388 A JP24751388 A JP 24751388A JP H0297823 A JPH0297823 A JP H0297823A
- Authority
- JP
- Japan
- Prior art keywords
- shutter
- discharge
- closing
- ultraviolet detector
- combustion
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000002243 precursor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009532 heart rate measurement Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 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
- F23N5/02—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)
Abstract
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。Detailed Description of the Invention (Industrial Application Field) The present invention provides a combustion control device that detects 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 related to.
Ｃ従来の技術〕
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。C. Prior Art Conventionally, in this type of combustion control device, an ultraviolet detector for detecting ultraviolet rays of a flame is used as a flame detection means for detecting 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 longitudinal sectional view showing the ultraviolet detector. 7th
The ultraviolet detector shown in the figure has a cathode 32 and an anode 33 provided in a glass tube 31 filled with a specific gas, and a voltage is applied between the two 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。With this voltage applied, when ultraviolet rays generated from a flame are irradiated, photoelectrons are emitted from the cathode 32, and these photoelectrons collide with gas molecules in the glass tube 31 and are ionized repeatedly. A discharge current flows between the anode 33 and the anode 33, and the presence of a 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。One failure mode for this ultraviolet detector is ultraviolet light (
There is a self-discharge phenomenon in which discharge occurs even in the absence of flame (flame), and there is no difference in the discharge phenomenon between this self-discharge and flame-detected 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, if self-discharge occurs during combustion, the combustion control means that controls combustion based on the flame detection signal from the ultraviolet detector will not notice the flame extinguishment even if the fire goes out, and will send a signal to close the fuel valve. This is extremely 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。As a countermeasure to this problem, there is a combustion control device that is a system that intermittently shuts off the connection between the combustion means and the ultraviolet detector, and confirms that the discharge current of the ultraviolet detector also stops when the flame is no longer visible.
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、火
炎の光を遮断する時間を長くするようにシャッタ４の閉
じ時間を長くするシャッタ駆動回路、７は長くシタシャ
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, 2
is an ultraviolet detector that detects the flame 3; 4 is a shutter disposed between the burner 1 and the ultraviolet detector 2; and 5 is a first unit that integrates the discharge pulse from the ultraviolet detector 2 and compares it with a set value.
6 is a shutter drive circuit that lengthens the closing time of the shutter 4 so as to extend the time to block the flame light based on the output signal of the integrating circuit 5; 7 is a shutter drive circuit that sets the closing time of the shutter 4 to be long. This is a second comparator circuit that outputs an alarm signal when the time is exceeded.
（発明が解決しようとする課題）
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。(Problems to be Solved by the Invention) Since the conventional combustion control device is configured as described above, it is difficult to accurately detect a precursor phenomenon leading 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、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 not because the number of discharges gradually increases for all states, but because the number of groups in states with high discharge frequency gradually increases. There is a problem in that an alarm signal is not output unless the occurrence of self-discharge becomes nearly continuous, and it is difficult to notify that self-discharge is approaching.
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。This invention was made in order to solve the above-mentioned problems, and aims to provide a combustion control device that can detect a precursor phenomenon of self-discharge of an ultraviolet detector and perform appropriate combustion control. purpose.
（課題を解決するための手段）
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。(Means for Solving the Problems) A combustion control device according to the present invention measures the discharge of the ultraviolet detector when a shutter that opens and closes between the combustion means and the ultraviolet detector is closed, and measures the discharge of the ultraviolet detector at intervals of this discharge. The apparatus is equipped with an alarm signal output means that outputs an alarm signal upon determining that the value is within a set value.
（作用）
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。(Function) The combustion control device of the present invention can detect a precursor phenomenon of self-discharge of the ultraviolet detector by determining that the discharge interval of the ultraviolet detector is within a set value and outputting an alarm signal. Prevent and prevent danger through accurate combustion control.
（実施例）
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。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In FIG. 1, in which the same parts as in FIG. 8 are given the same reference numerals,
Reference numeral 8 denotes a flame detection circuit which detects flame by inputting the detection signal from the ultraviolet detector 2, and this flame detection circuit 8 detects the drive circuit 9 of the ultraviolet detector 2 and the flame 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。11 is a 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 a combustion control means for controlling the discharge of the ultraviolet ray detector 2 when the shutter 4 is closed. The microcomputer functions as an alarm signal output means that measures the discharge interval, determines that the discharge interval is within a set value, and outputs 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 explained. 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 via the combustion control means 11 with this flame detection signal. At the same time, the shutter drive circuit 6 is activated.
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
がなくなリ、シャッタ駆動回路６の不動作でシャッタ４
を開き、以下、この一連のシャツ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 this shutter drive circuit 6 operates, the shutter is closed. Therefore, the detection signal from the ultraviolet detector 2 disappears, and the input to the combustion control means 11 and the shutter drive circuit 6 disappears.
This series of opening and closing operations is repeated at regular intervals. In this case, the opening/closing cycle of the shutter 4 is approximately 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。During the opening/closing operation of the shutter 4, if the ultraviolet detector 2 is not deteriorated, as shown in FIG. 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Ｐ、
が生ずるようになる。However, as the ultraviolet detector 2 deteriorates, the discharge pulses P, even when the shutter 4 is closed, as shown in FIG.
begins to occur.
そこで、このシャッタ４の閉時に生じた放電パルスＰ、
を比較回路１２．波形整形回路１３を介してマイコン１
４に入力する。マイコン１４は人力された放電パルスＰ
、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 generated when the shutter 4 is closed,
Comparison circuit 12. Microcomputer 1 via waveform shaping circuit 13
Enter 4. The microcomputer 14 generates a manually generated discharge pulse P.
The pulse interval X of , is measured by a timer counter and the output of the alarm signal is determined.
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ＳＴＩで判断動作
をスタートすると、Ｎ＝Ｏとしくステップ５Ｔ２）、シ
ャッタ４が閉か否かを判断する（ステップ５Ｔ３）。Hereinafter, the determination operation of the microcomputer 14 will be explained based on the flowchart shown in FIG. When the determination operation is started in step STI, N=O is set (step 5T2), and it is determined whether the shutter 4 is closed (step 5T3).
ＹＥＳであれば、ステップＳＴ４で放電パルスＰ、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５Ｔ５）。If YES, it is determined whether or not there is a discharge pulse P in step ST4, and if YES, pulse interval measurement:
Do X (step 5T5).
次に、ステップＳＴ６でＮ−Ｎ＋１とし、パルス数Ｎ≧
Ｎｏ （設定値）であるか否かを７判断しくステップ
５Ｔ７）、ＹＥＳであれば、パルス間隔の平均値又と標
準偏差ａを演算する（ステップ５Ｔ８）。Next, in step ST6, set N-N+1, and set the number of pulses N≧
If YES (step 5T7), the average value or standard deviation a of the pulse interval is calculated (step 5T8).
なお、上記ステップＳＴ３．ＳＴ４゜
ＳＴフの判断において、ＮＯの場合は上記ステップＳＴ
３からステップＳＴ７の動作を繰返す。Note that the above step ST3. In the judgment of ST4゜ST, if NO, proceed to the above step ST.
The operations from step ST3 to step ST7 are repeated.
一方、ステップＳＴ９でＸ≦Ｘｏ （設定値）の判断
を行い、ＹＥＳであれば、ステップ５ＴＩＯで警報を出
力する。また、ＮＯであれば、ステップｓ’ｒｔｔでＸ
≦ＸＯ＋ｄの判断な行い、ＹＥＳであれば、ステップ５
Ｔ１２でσ≦０゜の判断を行い、ＹＥＳであれば、ステ
ップ５ＴＩＯに至り警報を出力する。On the other hand, in step ST9 it is determined whether X≦Xo (set value), and if YES, an alarm is output in step 5TIO. Also, if NO, in step s'rtt
Judgment of ≦XO+d, if YES, step 5
At T12, it is determined whether σ≦0°, and if YES, the process proceeds to step 5TIO and an alarm is output.
また、ステップ５ＴＩＩ、５Ｔ１２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。Moreover, in the case of No in steps 5TII and 5T12, the above operations from step ST2 are repeated.
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。Note that 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Ｘ又はＸ
＋３０の値が基準値以下となったとき、警報出力を出す
。a) Measure up to 30 pulses in total while repeatedly blocking the light from the flame that reaches the ultraviolet detector 2 with the shutter 4, and calculate the frequency distribution of these pulse intervals as the fifth Take the average value X or X as shown in the figure.
When the value of +30 falls 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, a discharge pulse measurement period T may be provided during which the above determination is made at regular intervals while the shutter is opened and closed at short intervals.
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。In this way, even if a narrow pulse interval occurs in rare cases, an alarm will not be output, and false alarms 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 that reaches the ultraviolet detector 2 for 2 seconds is repeated, for example, seven times, and when the total number of discharge pulses during this interruption is, for example, 48 or more, an alarm is output.
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回申３回以上あるとき警報出力を
出す。In addition, if the light is intermittently interrupted for 2 seconds, for example, repeated 7 times, the total number of discharges during each interruption is 4 pulses/
If the time exceeds 2 seconds 3 out of 7 times, an alarm will be output.
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。In this way, even if the frequency of occurrence of discharge increases rarely, an alarm will not be output 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 a discharge when the light from the flame reaching the ultraviolet detector 2 is blocked by the shutter 4, the time interval of this discharge is less than the reference value, or the time interval between two large and small reference values. An output signal is output when there is a discharge.
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 light from the flame is blocked, for example, seven times by the shutter 4, and the above-mentioned output signal is received, for example, six times or more, an alarm is output. In this way, false alarms due to noise can be reliably prevented.
（発明の効果）
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。(Effects of the Invention) As described above, according to the present invention, an alarm signal is output by determining that the discharge interval of the ultraviolet detector that detects light from a flame is within a set value. , the UV detector can detect the precursor phenomenon of self-discharge,
This has the effect of preventing erroneous detection due to deteriorated ultraviolet detectors and allowing safe and accurate combustion control.
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図はシャツ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）。
第
第
図
第
図
第
図
第
図FIG. 1 is a block diagram showing a combustion control device according to an embodiment of the present invention, FIGS. 2 and 3 are illustrations of discharge current for opening and closing of the shutter, and FIG. 4 is a flow chart for explaining the operation. Figure 5 is a frequency distribution diagram of discharge pulse intervals.
FIG. 6 is an explanatory diagram of the opening/closing operation of the shirt shutter, FIG. 7 is a longitudinal sectional view of an ultraviolet detector, and FIG. 8 is a block diagram of a conventional combustion control device. 1 is a burner (combustion means), 2 is an ultraviolet detector, 3 is a flame, 4 is a shutter, 6 is a shutter drive circuit, 11 is a combustion control means, and 14 is a microcomputer (alarm signal output means). Figure Figure Figure Figure Figure
Claims (1)
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。a combustion means provided in a combustion chamber; an ultraviolet detector for detecting flame generated from the combustion means; a combustion control means for controlling the combustion means based on a flame detection signal from the ultraviolet detector; a shutter that opens and closes between the means and the ultraviolet detector; a shutter drive circuit that receives an output signal from the combustion control means and controls opening and closing of the shutter; and a discharge of the ultraviolet detector when the shutter is closed. A combustion control device comprising an alarm signal output means for measuring the discharge interval, 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 true JPH0297823A (en) | 1990-04-10 |
| JPH06100332B2 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) |
Cited By (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 |
| JP2015090245A (en) * | 2013-11-06 | 2015-05-11 | 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
Cited By (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 |
| JP2015090245A (en) * | 2013-11-06 | 2015-05-11 | Ｊｆｅスチール株式会社 | Flame monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06100332B2 (en) | 1994-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5026272A (en) | Combustion control device | |
| US20180142890A1 (en) | Flame detecting system | |
| JP5922452B2 (en) | Flame monitoring device | |
| FI85778C (en) | Flame detector | |
| US11280672B2 (en) | Flame detection system, discharge probability calculating method, and received light quantity measuring method | |
| JPH0297823A (en) | Combustion controller | |
| US11402261B2 (en) | Light detection system, discharge probability calculating method, and received light quantity measuring method | |
| EP1632761B1 (en) | Improvements in and relating to UV gas discharge tubes | |
| US11428575B2 (en) | Flame detection system and received light quantity measuring method | |
| US4016424A (en) | Ultraviolet radiation detector | |
| JP2021131253A (en) | Light detection system, discharge probability calculating method, and received light quantity measuring method | |
| JPH0512581A (en) | Fault detecting device for ultraviolet discharge tube | |
| JP5882802B2 (en) | Flame monitoring device | |
| JPH08145341A (en) | Combustion control device | |
| EP0374237B1 (en) | Radiation detector system | |
| JPH10267273A (en) | Abnormality detecting method for flame detecting device for combustion device | |
| JP2021131248A (en) | Light detection system, discharge probability calculating method, and received light quantity measuring method | |
| JP7232104B2 (en) | Flame detection system and fault diagnosis method | |
| JP2020165825A (en) | Flame detection system and fault diagnosis method | |
| JPH01305223A (en) | Combustion controlling device | |
| JPH06325269A (en) | Ultraviolet ray type sensor | |
| JP2965422B2 (en) | Burner misfire detection method | |
| JPH01305222A (en) | Combustion controlling device | |
| JPH0340199A (en) | Automatic leaky gas exhaust device | |
| JPS63169423A (en) | Combustion monitoring method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071212 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081212 Year of fee payment: 14 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081212 Year of fee payment: 14 |