JPH0484018A - Flame detection device of kerosene burner - Google Patents
Flame detection device of kerosene burnerInfo
- Publication number
- JPH0484018A JPH0484018A JP19737790A JP19737790A JPH0484018A JP H0484018 A JPH0484018 A JP H0484018A JP 19737790 A JP19737790 A JP 19737790A JP 19737790 A JP19737790 A JP 19737790A JP H0484018 A JPH0484018 A JP H0484018A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- flame detection
- burner
- circuit
- cds
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 113
- 239000003350 kerosene Substances 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 claims abstract description 27
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 description 9
- 230000005856 abnormality Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Control Of Combustion (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、石油燃焼器の炎検出装置に関し、更に詳細に
は、石油燃焼器のバーナが燃焼中であるか又は燃焼停止
中であるかを炎を有無により監視する為の炎検出装置に
関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a flame detection device for an oil combustor, and more particularly, to detect whether a burner of an oil combustor is burning or not. This invention relates to a flame detection device for monitoring the presence or absence of flame.
〈従来技術とその課題〉
ガン方式のバーナを装備した石油給湯器の燃焼器では、
出湯を大能力状態で長時間使用すると、炉内（缶体内）
で局部的に高温部分が生じ、バーナがオフ（燃焼停止）
した後も一定時間その状態が継続する。特に、局部的な
高温部分が生ずるのを防止する為に断熱材等が使用され
ると、その高温部分が赤熱され、バーナがオン（燃焼）
していた時間が長い場合は、バーナの燃焼が停止された
後も、長時間、明るさが残留する。<Conventional technology and its issues> In the combustor of an oil water heater equipped with a gun-type burner,
If the tap water is used at high capacity for a long time, the inside of the furnace (inside the can)
A locally high temperature area occurs and the burner turns off (combustion stops).
This state continues for a certain period of time even after that. In particular, when insulation materials are used to prevent localized high-temperature areas from forming, the high-temperature areas become red-hot and the burner turns on (combustion).
If the burner has been on for a long time, the brightness will remain for a long time even after the burner has stopped burning.
従って、燃焼器において、バーナのオン、オフを監視す
るために例えばＣｄＳにより炎の有無を検出する場合、
バーナオフ後の高温部の赤熱期間における明るさとバー
ナオン中の明るさにあまり差がないため、この微妙な明
るさの差の検出を鋭敏な感度を以て行う必要があったが
、単一の炎有無判定基準値を用いていた従来の炎検出装
置（後述する）では、感度の切り替えもできず、上記の
ような場合の炎の有無の識別が困難になっていた。Therefore, in a combustor, when detecting the presence or absence of a flame using CdS to monitor whether the burner is on or off,
Because there is not much difference between the brightness during the red-hot period of the high-temperature area after the burner is turned off and the brightness when the burner is on, it was necessary to detect this subtle difference in brightness with high sensitivity. Conventional flame detection devices (described later) that use reference values cannot switch sensitivity, making it difficult to identify the presence or absence of flame in the above-mentioned cases.
又、ＣｄＳ炎検出エレメントでは、検出面に煤や埃が固
着している場合検出感度が劣化してくるが、このような
場合、バーナオン時の炎検出を低感度モードに切り替え
て行う必要があったが、従来の炎検出装置では、単一の
炎有無判定基準値を用いていた為そのような感度の切り
替えが出来ず、ＣｄＳの怒度劣化時には安定した炎検出
ができなかった。In addition, the detection sensitivity of CdS flame detection elements deteriorates if soot or dust adheres to the detection surface, but in such cases, it is necessary to switch to low sensitivity mode for flame detection when the burner is on. However, since conventional flame detection devices use a single flame presence/absence determination reference value, such sensitivity switching is not possible, and stable flame detection is not possible when CdS anger deteriorates.
上記の単一の炎有無判定基準値を用いた従来の石油燃焼
器の炎検出装置の炎検出回路の一例を、以下、簡単に説
明する。その回路は、第４図に示す通り、正帰還方式の
シュミット・トリガ回路により構成されており、ＣｄＳ
等による炎検出センサインピーダンス２１２、炎検出電
圧回路２０１−２１８２１２、基準電圧生成回路２０２
−２１９−２０３を有する。An example of a flame detection circuit of a conventional flame detection device for an oil combustor using the above single flame presence/absence determination reference value will be briefly described below. As shown in Figure 4, the circuit is composed of a positive feedback Schmitt trigger circuit, and the CdS
Flame detection sensor impedance 212, flame detection voltage circuit 201-218212, reference voltage generation circuit 202, etc.
-219-203.
炎検出電圧（回路点２１８の電圧）及び炎有無判定基準
電圧（回路点２１９の電圧）を、それぞれ、反転入力端
子及び非判定入力端子に入力する。それらの電圧を比較
するための比較回路２０９、及び比較結果を炎検出コン
トローラ１６（の入力端子Ｉ）に向けて出力するための
炎検出回路出力端子２１０、及び炎検出コントローラ１
６から構成されている。The flame detection voltage (voltage at circuit point 218) and flame presence/absence determination reference voltage (voltage at circuit point 219) are input to the inverting input terminal and non-determination input terminal, respectively. A comparison circuit 209 for comparing those voltages, a flame detection circuit output terminal 210 for outputting the comparison result toward (the input terminal I of) the flame detection controller 16, and a flame detection circuit output terminal 210 for outputting the comparison result to (the input terminal I of) the flame detection controller 1.
It consists of 6.
本発明は上記の従来技術の種々の欠点を解消することが
でき、特にバーナオン中の炎による明るさとバーナオフ
後の赤熱による残光的明るさを鋭敏に識別することがで
き、以てバーナオン又はオフを炎の有無の検出により正
しく監視することができる石油燃焼器の炎検出装置を提
供することを目的としている。The present invention can eliminate the various drawbacks of the above-mentioned prior art, and in particular, can sharply distinguish between the brightness caused by the flame while the burner is on and the afterglow brightness due to the red heat after the burner is turned off. It is an object of the present invention to provide a flame detection device for an oil combustor that can correctly monitor the flame by detecting the presence or absence of flame.
〈課題を解決するための手段〉
上記の目的を達成するために、本発明の石油燃焼器の炎
検出装置は、バーナが燃焼中であるか又は燃焼停止中で
あるかを炎の有無により監視する為の炎検出回路と、該
炎検出回路と信号を交換する炎検出コントローラとを有
する石油燃焼器の炎検出装置において、前記炎検出回路
は、炎検出センサと、該炎検出センサにより得られる値
を炎検出電圧に変換する炎検出電圧生成回路と、炎を有
無の判定の基準となる２つの基準電圧を生成する第１、
第２の基準電圧生成回路と、前記炎検出電圧を、前記第
１基準電圧又は第２基準電圧と比較する為の比較回路と
を有し、且つ前記炎検出コントローラは、バーナの燃焼
停止信号を出力した後も引き続き前記比較回路からの炎
有りの信号を入力することを条件として、前記基準電圧
を第１基準電圧から第２基準電圧に切り換える信号を炎
検出回路に出力するよう構成したことを特徴としている
。<Means for Solving the Problems> In order to achieve the above object, the flame detection device for an oil combustor of the present invention monitors whether the burner is burning or has stopped combustion based on the presence or absence of a flame. In the flame detection device for an oil combustor, the flame detection circuit has a flame detection circuit for exchanging signals with the flame detection circuit, and a flame detection controller for exchanging signals with the flame detection circuit. a flame detection voltage generation circuit that converts the value into a flame detection voltage; and a first circuit that generates two reference voltages that serve as standards for determining the presence or absence of a flame.
The flame detection controller includes a second reference voltage generation circuit and a comparison circuit for comparing the flame detection voltage with the first reference voltage or the second reference voltage, and the flame detection controller generates a combustion stop signal of the burner. A signal for switching the reference voltage from the first reference voltage to the second reference voltage is output to the flame detection circuit on the condition that the signal indicating the presence of flame from the comparison circuit continues to be input even after the output. It is a feature.
く作用〉
本発明の上記特徴によれば、炎検出コントローラによる
バーナの燃焼停止信号を出力した後も引き続き炎有りの
信号を入力した場合には、炎検出のための基準電圧を第
１基準電圧から第２基準電圧に切り換えることができる
ので、該第２基準電圧の値を疑似炎と真正炎との区別が
できるような値に設定することにより、前記燃焼停止信
号出力後の炎検出が異常燃焼によるものか否かを正確に
判定することができる。例えば、炎検出センサとしてＣ
ｄＳを用いる場合は、第２基準電圧レベルが第１基準電
圧レベルより低いレベルに設定されるため、上記のバー
ナオフ時における炎検出回路による炎検出の感度はそれ
だけ高められ、従って、バーナオフ時の炉内の残熱によ
る赤熱部の明るさをバーナオン時の炎を明るさと鋭敏に
識別することができ、結果として、本発明の石油燃焼器
の炎検出装置により、バーナのオン及びオフを、炎を有
無により確実に監視することができる。更に、バーナオ
フ時に第２基準電圧に基づき炎検出を行った結果炎有り
の結果がでた場合は、何等かの異常燃焼がバーナオフと
非同期的に起こったものと判断できるので、直ちに石油
燃焼器を安全動作させる等の処置をとることができる。According to the above-mentioned features of the present invention, when a flame presence signal is continuously input after the flame detection controller outputs a burner combustion stop signal, the reference voltage for flame detection is changed to the first reference voltage. By setting the value of the second reference voltage to a value that can distinguish between a pseudo flame and a true flame, abnormal flame detection after the combustion stop signal is output can be prevented. It is possible to accurately determine whether the cause is due to combustion or not. For example, as a flame detection sensor, C
When using dS, the second reference voltage level is set to a lower level than the first reference voltage level, so the sensitivity of flame detection by the flame detection circuit when the burner is off is increased accordingly, and therefore, the flame detection sensitivity when the burner is off is increased accordingly. The brightness of the red-hot part due to residual heat in the oil burner can be sharply distinguished from the brightness of the flame when the burner is on. It is possible to monitor reliably depending on the presence or absence. Furthermore, if flame detection is performed based on the second reference voltage when the burner is off, and a flame is detected, it can be determined that some kind of abnormal combustion has occurred asynchronously with the burner off, so immediately turn off the oil combustor. Measures can be taken to ensure safe operation.
〈実施例〉
本発明の石油燃焼器の炎検出装置を、その実施例を示す
図面に基づき説明する。<Example> A flame detection device for an oil combustor according to the present invention will be described based on drawings showing examples thereof.
第１図は本発明実施例の全体構成図、第２図は本発明の
実施例に関わる回路図、第３図は本実施例の動作を示す
フローチャートである。FIG. 1 is an overall configuration diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram relating to the embodiment of the present invention, and FIG. 3 is a flowchart showing the operation of this embodiment.
まず第１図につき説明する。本図に示す石油給湯機は、
缶体１１、断熱材１５、熱交換器１４、及び排気口２５
を含む炉体１０と、燃料噴射ノズル１８、点火器１９、
及び炎検出センサ１３（本実施例の場合はＣｄ５）を含
むバーナ１２と、燃料ポンプ２３と、燃料供給弁２２と
、点火電圧生成器２１と、送風機２０と、炎検出装置３
０と、石油給湯器コントローラ２４と、炎検出コントロ
ーラ１６と、及びリモコン１７とからなる。First, FIG. 1 will be explained. The oil water heater shown in this diagram is
Can body 11, heat insulating material 15, heat exchanger 14, and exhaust port 25
a furnace body 10 including a fuel injection nozzle 18, an igniter 19,
and a burner 12 including a flame detection sensor 13 (Cd5 in this embodiment), a fuel pump 23, a fuel supply valve 22, an ignition voltage generator 21, a blower 20, and a flame detection device 3.
0, an oil water heater controller 24, a flame detection controller 16, and a remote controller 17.
次に本発明の実施例に関わる回路を第２図に基づき説明
する。炎検出装置は回路３０で示されるが、該回路３０
の中の回路部分２２０は、第４図に示す従来の石油燃焼
器の炎検出装置の炎検出回路と同様であり、第４図の場
合と同様の機能を果たすので此処では説明を省略するが
、上記基本回路部分２２０は、本発明の実施例では、炎
有無判定第１基準電圧（以下においては、この第１基準
電圧をＣｄＳセンサインピーダンイスに換算し、Ｃｄ５
（Ｈ）と記す）に基づく炎検出回路である。一方、今１
つの炎有無判定の基準として使用する第２基準電圧（以
下においては、この第２基準電圧をＣｄＳセンサインピ
ーダンスに換算し、Ｃｄ５（Ｌ）と記す）は、従来の回
路におけると同様の第１基準電圧生成回路２０２−２１
９−２０３と新規に追加された回路２０５−２０８−２
０７−２０６のの合同回路（即ち、第２基準電圧生成回
路）により生成され、比較回路２０９の非反転入力端子
に入力される。炎検出電圧（回路点２１８の電圧）は、
比較回路２０９の反転入力端子に入力される。前記炎検
出コントローラ１６の出力端子０からは、低レベル又は
高レベルの信号が炎検出回路入力端子２１１に向けて出
力される。そして低レベル信号が出力される場合は、ト
ランジスタ２０８がオフになる為、該低レベル信号によ
り炎検出回路中の第１基準電圧生成回路を中心とする炎
検出回路２２０が生かされ、また高レベル信号が出力さ
れる場合は、トランジスタ２０８がオンになる為、該高
レベル信号により炎検出回路中の第２基準電圧生成回路
を中心とする炎検出回路２３０が生かされる。Next, a circuit related to an embodiment of the present invention will be explained based on FIG. The flame detection device is shown by circuit 30, which circuit 30
The circuit portion 220 inside is similar to the flame detection circuit of the conventional oil combustor flame detection device shown in FIG. 4, and performs the same function as in the case of FIG. 4, so the explanation will be omitted here. In the embodiment of the present invention, the basic circuit portion 220 has a first reference voltage for flame presence/absence determination (hereinafter, this first reference voltage will be converted into a CdS sensor impedance, and a Cd5
This is a flame detection circuit based on (denoted as (H)). On the other hand, now 1
The second reference voltage (hereinafter, this second reference voltage will be converted to CdS sensor impedance and referred to as Cd5(L)) used as a reference for determining the presence or absence of a flame is the same as the first reference in the conventional circuit. Voltage generation circuit 202-21
9-203 and newly added circuit 205-208-2
07-206 (ie, the second reference voltage generation circuit), and is input to the non-inverting input terminal of the comparison circuit 209. The flame detection voltage (voltage at circuit point 218) is
It is input to the inverting input terminal of the comparison circuit 209. From the output terminal 0 of the flame detection controller 16, a low level or high level signal is output toward the flame detection circuit input terminal 211. When a low level signal is output, the transistor 208 is turned off, so the flame detection circuit 220 centered on the first reference voltage generation circuit in the flame detection circuit is activated by the low level signal, and the high level When the signal is output, the transistor 208 is turned on, so that the flame detection circuit 230 centered on the second reference voltage generation circuit in the flame detection circuit is activated by the high level signal.
さて、第１図に示す石油給湯器において、バーナ１２の
燃焼が連続して長時間継続されると、バーナ１２がオフ
（燃焼停止）されても、その後暫時の間、Ｃｄ Ｓ １
３により測定される炉内部分では明るい状態が続く。従
って、この暫時の間は、Ｃｄ Ｓ １３のインピーダン
スは、直ちに高くなることがなく、低い状態を続ける。Now, in the oil water heater shown in FIG. 1, if the burner 12 continues to burn continuously for a long time, even if the burner 12 is turned off (combustion is stopped), Cd S 1 remains for a while after that.
The inside of the furnace measured by No. 3 remains bright. Therefore, during this time, the impedance of the Cd S 13 does not immediately become high, but continues to be low.
従って、この状態は、バーナ１２のオフの状態を従来方
式の炎有無判定基準値Ｃｄ５（Ｈ）のみに基づく炎検出
により確認することを困難にさせる。そこで、本発明の
炎検出装置では、Ｃｄ５（Ｈ）の外に、新規に、Ｃｄ５
（Ｈ）より低いレベルのＣｄ５（Ｌ）を使用し、Ｃｄ５
（Ｌ）に基づき、上述のバーナオフ後の炎の有無の検出
を行う。Therefore, this state makes it difficult to confirm the off state of the burner 12 by flame detection based only on the flame presence/absence determination reference value Cd5(H) in the conventional method. Therefore, in the flame detection device of the present invention, in addition to Cd5(H), Cd5
(H) Using a lower level of Cd5 (L), Cd5
Based on (L), the presence or absence of the flame after the burner is turned off is detected.
以下、本発明の炎検出装置の、２つの炎有無判定基準値
Ｃｄ５（Ｈ）及びＣｄ５（Ｌ）に基づく動作を、第３図
のフローチャート（及び一部、第１図及び第２図）に基
づき説明する。The operation of the flame detection device of the present invention based on the two flame presence/absence determination reference values Cd5 (H) and Cd5 (L) will be described below with reference to the flowchart in FIG. 3 (and some parts in FIGS. 1 and 2). I will explain based on this.
まず、第１の場合として、本発明の炎検出装置が正常に
機能する場合につき述べる。First, as a first case, a case where the flame detection device of the present invention functions normally will be described.
リモコン１７（第１図参照）の運転スイッチをオンにす
ると（第３図ステップ３００．３０１（オン）参照）、
炎検出コントローラ１６（本実施例ではマイコンを用い
る為、以下マイコン１６と記す、第２図参照）から燃焼
指令が出力され（第３図ステップ３０２参照）、オン指
令であればバーナ１２（第１図参照）がオン（燃焼開始
）され（第３図ステップ３０３参照）、炎検出回路２２
０（第２図参照）においてＣｄＳ （Ｈ）に基づく炎有
り （オン）／無しくオフ）の判定がなされる（第３図
ステップ３０４参照）。炎有り（オン）であれば（第３
図ステップ３０４（オン））、燃焼指令が燃焼停止指令
（オフ）になるまで燃焼が継続されるが（第３図ステッ
プ３０７（オン）及びライン３１６）、燃焼指令が燃焼
停止指令（オフ）になると、バーナ１２がオフ（燃焼停
止）される（第３図ステップ３０７（オフ） 、３０８
）。このバーナオフ時、Ｃｄ５（Ｈ）炎検出回路におけ
る第１基準値Ｃｄ５（Ｈ）に基づく炎有り （オン）／
無しくオフ）の判定が、炭窯しくオフ）であれば、炎検
出装置の動作はスタートに戻る（以上は、従来と同様で
ある）（第３図ステップ３０９（オフ）、ライン３１４
参照）。When the operation switch of the remote control 17 (see Figure 1) is turned on (see steps 300 and 301 (on) in Figure 3),
A combustion command is output from the flame detection controller 16 (hereinafter referred to as microcomputer 16, see FIG. 2, as a microcomputer is used in this embodiment) (see step 302 in FIG. 3), and if it is an ON command, the burner 12 (first ) is turned on (combustion starts) (see step 303 in Figure 3), and the flame detection circuit 22
At 0 (see FIG. 2), a determination is made based on CdS (H) whether there is a flame (on) or there is no flame (off) (see step 304 in FIG. 3). If there is a flame (on) (3rd
Step 304 (ON) in Figure 3), combustion continues until the combustion command becomes the combustion stop command (OFF) (Step 307 (ON) and line 316 in Figure 3), but the combustion command changes to the combustion stop command (OFF). Then, the burner 12 is turned off (combustion is stopped) (steps 307 (off), 308 in Fig. 3).
). When this burner is off, there is a flame based on the first reference value Cd5(H) in the Cd5(H) flame detection circuit (on)/
If it is determined that the charcoal kiln is completely off), the operation of the flame detection device returns to the start (the above is the same as before) (step 309 (off), line 314 in Figure 3).
reference).
しかし、上記のバーナオフ時（第３図のステップ３０８
）にもかかわらず第１基準値Ｃｄ５（Ｈ）に基づく炎有
り（オン）／無しくオフ）の判定が、炎有り（オン）で
あれば（第３図ステップ３０９（オン））、直ちに、マ
イコン１６の出力端子０（第２図参照）はオンにされ、
トランジスタ２０８（第２図参照）がオンにされ、第２
基準値Ｃｄ５（Ｌ）に基づき炎有り（オン）／無しくオ
フ）の判定をすることを可能にさせる回路即ちＣｄ５（
Ｌ）炎検出回路２３０（第２図参照）が作動させられる
。その結果、ＣｄＳの感度の切り替えがなされる（第３
図３１０参照）。すなわち、炎の有無を判定する基準値
が第１基準値Ｃｄ５（Ｈ）から第２基準値Ｃｄ５（Ｌ）
に低められるのである。この切り替え後における、Ｃｄ
５（Ｌ）炎検出回路２３０による炎有り （オン）／無
しくオフ）の判定が、炭窯しくオフ）であれば、バーナ
１２のオン（燃焼中）／オフ（燃焼停止中）に正しく対
応してＣｄＳが機能していることになるので、石油給湯
器の燃焼器全体が正常に燃焼していると判断され、炎検
出装置の動作はスタートに戻る（第３図ステップ３１１
（オフ）、ライン３１５及び３１４参照）。However, when the burner is turned off (step 308 in Figure 3),
), if the determination of whether there is a flame (on) or off without a flame based on the first reference value Cd5(H) is that there is a flame (on) (step 309 (on) in FIG. 3), immediately, Output terminal 0 of the microcomputer 16 (see Figure 2) is turned on,
Transistor 208 (see FIG. 2) is turned on and the second
A circuit that makes it possible to determine whether there is a flame (on) or no flame (off) based on the reference value Cd5 (L), that is, Cd5 (
L) Flame detection circuit 230 (see FIG. 2) is activated. As a result, the sensitivity of CdS is switched (third
(See Figure 310). That is, the reference value for determining the presence or absence of a flame varies from the first reference value Cd5(H) to the second reference value Cd5(L).
It is lowered to After this switching, Cd
5(L) If the flame detection circuit 230 determines whether there is a flame (ON) or no flame, but OFF, the burner 12 correctly corresponds to ON (combusting) or OFF (combustion stopped). Since the CdS is functioning, it is determined that the entire combustor of the oil water heater is burning normally, and the operation of the flame detection device returns to the start (step 311 in Figure 3).
(off), see lines 315 and 314).
そして以後、上記の動作が繰り返される。Thereafter, the above operation is repeated.
次に第２の場合として、本発明の炎検出装置の機能が異
常になった場合につき述べる。Next, as a second case, a case where the function of the flame detection device of the present invention becomes abnormal will be described.
、この異常のその１は、バーナ１２をオン（燃焼開始）
した時Ｃｄ５（Ｈ）炎検出回路２２０が炎有りの判定を
示さず何度着火を繰り返しても炎有り（オン）の判定を
示さない場合（第３図３００．３０１．３０２．３０３
．３０４（オフ） 、３０５．３０６（オフ））である
。更に異常その２は、バーナをオフ（燃焼停止）した時
、ステップ３０９．３１０．３１１．３１２でＣｄ５（
Ｌ）炎検出回路２３０（第２図参照）が一定時間（Ｔ）
内にオフ（炭窯しの判定を）しない場合である。これら
の異常の場合には、燃焼器全体のどこかに異常が起こっ
たという判断の下に、燃焼器の安全動作が発動され、燃
焼器動作の全停止シーケンスが開始され、異常表示がな
される（第３図ステップ３１３参照）。, the first of these abnormalities is when the burner 12 is turned on (combustion starts)
When the Cd5 (H) flame detection circuit 220 does not indicate the presence of a flame and does not indicate the presence of a flame (on) no matter how many times the ignition is repeated (Fig. 3 300.301.302.303
．． 304 (off), 305.306 (off)). Furthermore, the second abnormality is that when the burner is turned off (combustion is stopped), Cd5 (
L) The flame detection circuit 230 (see Figure 2) is activated for a certain period of time (T).
This is a case where the charcoal kiln is not turned off (determined to be a charcoal kiln). In the event of these abnormalities, it is determined that an abnormality has occurred somewhere within the combustor, and the combustor safety operation is activated, a complete combustor operation shutdown sequence is initiated, and an abnormality display is displayed. (See step 313 in FIG. 3).
上記の本発明の実施例の効果は、第１に、バーナオン時
には、ＣｄＳによる炎検出がＣｄ５０高インピーダンス
側に対応した第１基準値Ｃｄ５（Ｈ）を基準としてなさ
れる為、ＣｄＳの感度が鋭敏でなくても（即ちＣｄＳが
煤や埃により多少劣化していても）、安定した炎検出（
炎有り（オン）の検出）ができるということである。第
２の効果は、バーナオフ時には、ＣｄＳの低インピーダ
ンス側に対応した第２基準値ｃａＳ（Ｌ）に切り換えて
の炎検出が可能となる為、燃焼器の断熱材等が赤熱して
炉内照度が低下しない場合でも炎検出（炭窯（オフ）の
検出）ができるということである。第３の効果は、Ｃｄ
Ｓの短絡事故の検出が、前述の異常時のその２の場合で
示した方式により行うことができ、且つそれに対応した
処理を取ることができるということである。第４の効果
は、ＣｄＳが断線した場合の検出が、前述の異常時のそ
の１のばしで示した方式により行うことができ、且つそ
れに対応した処置を取ることができるということである
。The effects of the embodiment of the present invention described above are as follows: First, when the burner is on, flame detection by CdS is performed based on the first reference value Cd5 (H) corresponding to the high impedance side of Cd50, so the sensitivity of CdS is sensitive. (i.e., even if the CdS is somewhat degraded by soot and dust), stable flame detection (
This means that it is possible to detect the presence of a flame (on). The second effect is that when the burner is off, flame detection can be performed by switching to the second reference value caS (L) corresponding to the low impedance side of CdS, so the heat insulating material of the combustor becomes red hot and the illuminance inside the furnace decreases. This means that flame detection (detection of charcoal kiln (off)) can be performed even if the temperature does not decrease. The third effect is Cd
This means that the short-circuit accident of S can be detected by the method shown in the second case of abnormality described above, and corresponding processing can be taken. The fourth effect is that detection of a CdS disconnection can be performed using the method shown in Part 1 in the case of an abnormality described above, and corresponding measures can be taken.
く効果〉
本発明は以上の構成、作用からなり、請求項１に記載の
石油燃焼器の炎検出装置によれば、バーナの燃焼停止信
号を出力した後も引き続き炎有りの信号を人力した場合
には、炎検出コントローラによって炎検出のための基準
電圧が第１基準電圧から第２基準電圧に切り換えられる
ので、よってバーナオフ時の炉内の残熱による赤熱部の
明るさをバーナオン時の炎の明るさと鋭敏に識別するこ
とができ、その結果バーナのオン及びオフを、炎を有無
により確実に監視することができる。よって勿論バーナ
オフ時に第２基準電圧に基づき炎検出を行った結果炎有
りの結果がでた場合は、何らかの異常燃焼がバーナオフ
と非同期的に起こったものと判断できるので、直ちに石
油燃焼器を安全動作させる（例えば、全停止シーケンス
を開始させ、異常の表示をさせる）等の処置をとること
ができる。Effects> The present invention has the above-described configuration and operation, and according to the flame detection device for an oil combustor according to claim 1, even after the burner combustion stop signal is output, if a flame presence signal is continuously output manually. In this case, the reference voltage for flame detection is switched from the first reference voltage to the second reference voltage by the flame detection controller, so the brightness of the red hot part due to residual heat in the furnace when the burner is off is changed from the brightness of the flame when the burner is on. The brightness can be distinguished sharply, so that the on and off of the burner can be reliably monitored by the presence or absence of a flame. Therefore, of course, if flame detection is performed based on the second reference voltage when the burner is off, and the result shows that there is a flame, it can be determined that some kind of abnormal combustion has occurred asynchronously with the burner off, so the oil combustor should be put into safe operation immediately. (for example, initiate a full stop sequence and display an abnormality indication).
第１図は本発明の石油燃焼器の炎検出装置を石油給湯器
の燃焼器の炎検出に実施した場合を示す石油給湯器の全
体構成図、第２図は本発明の実施例に関わる回路図、第
３図は本発明の実施例の動作を示すフローチャート、第
４図は従来例を示す回路図である。
０：炎検出コントローラ入力端子
Ｉ：炎検出コントローラ出力端子
１２：バーナ
１３：炎検出センサ
１６：炎検出コントローラ
３０：石油燃焼器の炎検出装置
２０９：比較回路
２１０：炎検出回路出力端子
２１１：炎検出回路入力端子
２１２ ： 炎検出センサインピーダンス２０１−２１
８−２１２ ：炎検出電圧生成回路２０２−２１９−２
０３ ：第１基準電圧生成回路２０２−２１９−２０３
−２０５−２０８−２０７−２０６ ：第２基準電圧生
成回路
２２０．２３０：炎検出回路
第３図
第１図
第２図
第４図Fig. 1 is an overall configuration diagram of an oil water heater showing a case in which the flame detection device for an oil combustor of the present invention is implemented to detect a flame in a combustor of an oil water heater, and Fig. 2 is a circuit diagram related to an embodiment of the present invention. 3 are flow charts showing the operation of the embodiment of the present invention, and FIG. 4 is a circuit diagram showing the conventional example. 0: Flame detection controller input terminal I: Flame detection controller output terminal 12: Burner 13: Flame detection sensor 16: Flame detection controller 30: Oil combustor flame detection device 209: Comparison circuit 210: Flame detection circuit output terminal 211: Flame Detection circuit input terminal 212: Flame detection sensor impedance 201-21
8-212: Flame detection voltage generation circuit 202-219-2
03: First reference voltage generation circuit 202-219-203
-205-208-207-206: Second reference voltage generation circuit 220.230: Flame detection circuit Figure 3 Figure 1 Figure 2 Figure 4
Claims (1)
かを炎の有無により監視する為の炎検出回路と、該炎検
出回路と信号を交換する炎検出コントローラとを有する
石油燃焼器の炎検出装置において、前記炎検出回路は、
炎検出センサと、該炎検出センサにより得られる値を炎
検出電圧に変換する炎検出電圧生成回路と、炎を有無の
判定の基準となる２つの基準電圧を生成する第１、第２
の基準電圧生成回路と、前記炎検出電圧を、前記第１基
準電圧又は第２基準電圧と比較する為の比較回路とを有
し、且つ前記炎検出コントローラは、バーナの燃焼停止
信号を出力した後も引き続き前記比較回路からの炎有り
の信号を入力することを条件として、前記基準電圧を第
１基準電圧から第２基準電圧に切り換える信号を炎検出
回路に出力するよう構成したことを特徴とする石油燃焼
器の炎検出装置。(1) An oil combustor having a flame detection circuit for monitoring whether the burner is in combustion or combustion stopped by the presence or absence of a flame, and a flame detection controller that exchanges signals with the flame detection circuit. In the flame detection device, the flame detection circuit includes:
A flame detection sensor, a flame detection voltage generation circuit that converts a value obtained by the flame detection sensor into a flame detection voltage, and a first and second reference voltage that generates two reference voltages that are used as a reference for determining the presence or absence of a flame.
and a comparison circuit for comparing the flame detection voltage with the first reference voltage or the second reference voltage, and the flame detection controller outputs a burner combustion stop signal. The flame detecting circuit is characterized in that it is configured to output a signal for switching the reference voltage from the first reference voltage to the second reference voltage to the flame detection circuit on the condition that a flame presence signal from the comparison circuit is continuously inputted thereafter. flame detection device for oil combustors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2197377A JPH06103091B2 (en) | 1990-07-25 | 1990-07-25 | Oil combustor flame detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2197377A JPH06103091B2 (en) | 1990-07-25 | 1990-07-25 | Oil combustor flame detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0484018A true JPH0484018A (en) | 1992-03-17 |
| JPH06103091B2 JPH06103091B2 (en) | 1994-12-14 |
Family
ID=16373497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2197377A Expired - Fee Related JPH06103091B2 (en) | 1990-07-25 | 1990-07-25 | Oil combustor flame detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06103091B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275944A (en) * | 2008-05-13 | 2009-11-26 | Corona Corp | Combustion state detecting device |
-
1990
- 1990-07-25 JP JP2197377A patent/JPH06103091B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275944A (en) * | 2008-05-13 | 2009-11-26 | Corona Corp | Combustion state detecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06103091B2 (en) | 1994-12-14 |
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