JPS60149825A - Flame diminishing safety device in burner - Google Patents

Flame diminishing safety device in burner

Info

Publication number
JPS60149825A
JPS60149825A JP684684A JP684684A JPS60149825A JP S60149825 A JPS60149825 A JP S60149825A JP 684684 A JP684684 A JP 684684A JP 684684 A JP684684 A JP 684684A JP S60149825 A JPS60149825 A JP S60149825A
Authority
JP
Japan
Prior art keywords
burner
combustion flame
phototransistor
flame
solenoid valve
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.)
Pending
Application number
JP684684A
Other languages
Japanese (ja)
Inventor
Ichiro Sugimoto
一郎 杉本
Akishi Kegasa
明志 毛笠
Yoichi Higuchi
洋一 樋口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osaka Gas Co Ltd
Original Assignee
Osaka Gas Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Osaka Gas Co Ltd filed Critical Osaka Gas Co Ltd
Priority to JP684684A priority Critical patent/JPS60149825A/en
Publication of JPS60149825A publication Critical patent/JPS60149825A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/02Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means

Abstract

PURPOSE:To make a positive and stable sensing of combustion flame even if the combustion flame is swung due to air or the like by a method wherein light from the combustion flame is guided to a light receiving element through an optical fiber. CONSTITUTION:Light generated by combustion flame of a burner 1 is guided to a phototransistor 3 through an optical fiber 2. While the burner 1 keeps an ignited condition, the phototransistor 3 keeps its conducted condition, a delay circuit 4 constituting a signal processing circuit B generates an instruction signal so as to keep an opened condition of a solenoid valve arranged in fuel supplying passage for the burner 1 in respect to a colenoid valve opening and closing control circuit C. In turn, when the combustion flame of the burner 1 is diminished accidentally under an influence of wind or a lack of oxygen, the phototransistor 3 becomes non-conductive, the solenoid valve opening and closing control circuit C closes the solenoid valve and then the supplying of fuel to the burner 1 is automatically stopped.

Description

【発明の詳細な説明】 本発明は、バーナの燃焼炎が風の影響や酸欠等に起因し
て不測に消火したときに該バーナへの燃料供給を自動的
に遮断させるように構成しであるバーナにおける消火安
全装置に関する。
[Detailed Description of the Invention] The present invention is configured to automatically cut off the fuel supply to the burner when the combustion flame of the burner is unexpectedly extinguished due to the influence of wind or lack of oxygen. Regarding a fire extinguishing safety device in a certain burner.

かかる消火安全装置は、一般に、第1図に示すように、
バーナ燃焼炎検知部(A)と、その燃焼炎検知部(A)
からの出力信号による信号処理回路(B)、および、そ
の信号処理回路(B)からの出力に基いてバーナへの燃
料供給路に介装された電磁弁に対する開閉制御回路(C
)とから成る電装基盤(D)とで構成されている。
Such a fire extinguishing safety device generally includes, as shown in FIG.
Burner combustion flame detection section (A) and its combustion flame detection section (A)
A signal processing circuit (B) based on the output signal from the signal processing circuit (B), and an opening/closing control circuit (C) for the solenoid valve installed in the fuel supply path to the burner based on the output from the signal processing circuit (B).
) and an electrical equipment board (D).

ところで、従来の消火安全装置にあっては、例えば第2
図に示すように、その燃焼炎検知部cA)として、バー
ナ燃焼炎に直接触れる位置にフレームロッド(または熱
電対)(a)などのようなフレーム電流を検出するセン
サーを設けた構成のものを用いていたが、かかるフレー
ムロッドし)によって検出されるフレーム電流は、基本
的に微少・な脈流であると共に、風等による燃焼炎のゆ
らぎに起因して非常に不安定なものであるため、その信
号処理回路(B)Kは、風等による炎のゆらぎなどによ
るごく短時間の信号電流のとぎれを補償するだめのハイ
カット機能を有する遅延回路(b)のみならず、その前
段に増幅回路(−)や、脈流を直流化するだめの子端回
路(d)を設けなければならず、従って、電装基盤(p
)の構成部品が多くなって、その信頼性が低下すると共
に、比較的大型のものになって広い設置スペースを要す
る、という欠点がある。そこで、電装基盤(D)のディ
スクリートな回路部分をIC化することも考えられるが
、そのような専用のICは非常にコストが高くつき、製
品のコストアップを招く不都合がある。
By the way, in conventional fire extinguishing safety devices, for example, the second
As shown in the figure, the combustion flame detection part cA) has a structure in which a sensor for detecting flame current such as a flame rod (or thermocouple) (a) is installed in a position that directly touches the burner combustion flame. However, the flame current detected by such flame rods is basically a minute pulsating current and is extremely unstable due to fluctuations in the combustion flame due to wind, etc. , the signal processing circuit (B) K includes not only the delay circuit (b) which has a high-cut function to compensate for very short interruptions in the signal current due to flame fluctuations caused by wind, etc., but also an amplifier circuit in the preceding stage. (-) and a secondary terminal circuit (d) for converting pulsating current into DC, it is necessary to provide an electrical equipment board (p
) has the drawbacks of having a large number of component parts, lowering its reliability, and being relatively large, requiring a large installation space. Therefore, it is conceivable to convert the discrete circuit portion of the electrical equipment board (D) into an IC, but such a dedicated IC is very expensive and has the disadvantage of increasing the cost of the product.

本発明は、上記実情に鑑みてなされたものであって、そ
の目的は、燃焼炎検知部を、たとえ風等による燃焼炎の
ゆらぎがあっても確実かつ安定的にその検知を行なえる
と共に、その後段の信号処理回路を含む電装基盤を、シ
ンプルでコンパクトな、かつ、安価で信頼性の高いもの
にぜんとすることにある。
The present invention has been made in view of the above-mentioned circumstances, and its purpose is to enable the combustion flame detector to reliably and stably detect the combustion flame even if the combustion flame fluctuates due to wind or the like. The objective is to completely make the electrical equipment base including the subsequent stage signal processing circuit simple, compact, inexpensive, and highly reliable.

以下、先ず本発明によるバーナにおける消火安全装置の
実施例を図面に基いて説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS First, embodiments of a fire extinguishing safety device for a burner according to the present invention will be described below with reference to the drawings.

第8図に示すように、バーナ(1)の燃焼炎検知部(A
)を、バーナ(1)の炎立ち上り箇所に一端側を対向さ
せた光ファイバー(2ンと、その光ファイバー(2)の
他端側に臨み、かつ、電装基盤(D)に設けられたスイ
ッチング用フォトトランジスタ(3)とから構成し、も
って、バーナ(1)の燃焼炎の発する光を、光ファイバ
ー(2ンを介してフォトトランジスタ(3)マで導ける
ようにしである。従って、バーナ(1)が燃焼状態を持
続している間は、フォトトランジスタ(3)にその光が
到達して、フォトトランジスタ(3)は導通(ON)状
態を維持し、信号処理回路CB)を構成する遅延回路(
4)は、電磁弁開閉制御回路(C)に対して、前記バー
ナ(1)への燃料供給路に介装された電磁弁を開状態に
保持させるように指令信号を発し続け、一方、前記バー
ナ(1)の燃焼炎が風の影響や酸欠等によって不測に消
火したときには、フォトトランジスタ(3)への燃焼炎
の光が断たれてフオ))ランジスタ(3)は非導通(O
F F’ )状態となり、遅延回路(4)は前記電磁弁
開閉制御回路C)に対して電磁弁に対する開状態保持指
令信号を停止するため、電磁弁開閉制御回路(C)は電
磁弁を閉動させ、もって、バーナ(1)への燃料供給は
自動的に遮断される。
As shown in Fig. 8, the combustion flame detection part (A
) with one end facing the flame rise point of the burner (1) and a switching photo facing the other end of the optical fiber (2) and installed on the electrical board (D). The light emitted from the combustion flame of the burner (1) can be guided by the phototransistor (3) via the optical fiber (2).Therefore, the burner (1) While the combustion state is maintained, the light reaches the phototransistor (3), the phototransistor (3) maintains the conductive (ON) state, and the delay circuit (which constitutes the signal processing circuit CB)
4) continues to issue a command signal to the solenoid valve opening/closing control circuit (C) to keep the solenoid valve installed in the fuel supply path to the burner (1) open; When the combustion flame of the burner (1) is unexpectedly extinguished due to the influence of wind or lack of oxygen, the light of the combustion flame to the phototransistor (3) is cut off and the transistor (3) becomes non-conductive (O
F F') state, and the delay circuit (4) stops sending the solenoid valve open/close command signal to the solenoid valve opening/closing control circuit C), so the solenoid valve opening/closing control circuit (C) closes the solenoid valve. With this, the fuel supply to the burner (1) is automatically cut off.

なお、前記光ファイバー(2)の一端側を集光用レンズ
を介して燃焼炎立ち上シ箇所に対向させておくもよい。
Incidentally, one end of the optical fiber (2) may be placed opposite to the point where the combustion flame rises via a condensing lens.

以上型するに、本発明によるバーナにおける消火安全装
置は、バーナ燃焼炎が不測に消火したときに該バーナへ
の燃料供給を自動的に遮断させるように構成しであるも
のにおいて、一端用フオドトランジスタを臨ませて成る
燃焼炎検知部を備えている点に特徴がある。
In summary, the fire extinguishing safety device for a burner according to the present invention is configured to automatically cut off the fuel supply to the burner when the burner combustion flame is unexpectedly extinguished. It is unique in that it includes a combustion flame detection section that faces a transistor.

上記特徴構成により発揮される作用ならびに効果は次の
通りである。即ち、 (7)燃焼炎から発せられる光の有無に応じてON・O
FF作動するスイッチング用フォトトランジスタによっ
てバーナの燃焼・消火を直接的に検出できるようにした
ため、従来のフレーム電流ドを用いた場合のようにその
後段に増幅回路等を設ける必要が無く、信号処理回路ひ
いては電装基盤の構成部品数を少なくでき、もって、そ
の構成のシンプル化およびコンパクト化を達成でき、そ
の設置スペースが小さくてすむと共に、その信頼性を高
めることができ、また、製造コストの大幅な低減化を図
れるようになり、 (イ)また、従来のようにフレーム電流によ)燃焼炎の
有無を検知するのでは無く、光学的にそれを検知するよ
うにしたため、つまり、燃焼炎から全方向に発せられる
光を検知するようにしたため、風等によって炎が多少ゆ
らいでもそれによる検知結果への悪影響は殆ど無く、確
実かつ安定な検知が可能となり、また、直接的な受光部
材としての光ファイバーの設置位置の自由度も大きく、 (つ) しかも、燃焼炎の光を、変形自在な光ファイバ
ーを介して受光素子としてのフォトトランジスタへ導く
ようにしであるため、フォトトランジスタをバーナから
離れた任意の位簡に設けることができるので、フォトト
ランジスタが燃焼炎のゆらぎによる熱影響を受けること
も無い、 という種々の利点を有するものにできたのである。
The functions and effects exhibited by the above characteristic configuration are as follows. That is, (7) ON/O depending on the presence or absence of light emitted from the combustion flame.
Burner combustion and extinguishing can be directly detected using a switching phototransistor that operates as an FF, so there is no need to install an amplifier circuit in the subsequent stage, unlike when using a conventional flame current controller, and the signal processing circuit As a result, the number of components of the electrical board can be reduced, making its configuration simpler and more compact, requiring less installation space, increasing its reliability, and significantly reducing manufacturing costs. (a) In addition, instead of detecting the presence or absence of combustion flame (using flame current as in the past), it is now detected optically, which means that all Since the light emitted in the direction is detected, even if the flame fluctuates slightly due to wind, etc., there is almost no negative effect on the detection results, making reliable and stable detection possible.In addition, optical fiber can be used as a direct light receiving member. There is also a large degree of freedom in the installation position of the burner.(1) Moreover, since the light from the combustion flame is guided to the phototransistor as a light receiving element through a freely deformable optical fiber, the phototransistor can be placed anywhere away from the burner. Since the phototransistor can be installed in a simple position, the phototransistor is not affected by heat due to fluctuations in the combustion flame, which has various advantages.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はバーナにおける消火安全装置の一般的構成を示
すブロック図、第2図は従来構成の消火安全装置の詳細
ブロック図である。 そし°C1第8図は本発明に係るバーナにおける消火安
全装置の構成を示すブロック図である。 (1) ・・・バーナ、(2)・・・・・・光ファイバ
ー、(3)・・・・フォトトランジスタ、(A) ・・
・燃焼炎検知部。 代理人 弁理士 北 村 修
FIG. 1 is a block diagram showing the general configuration of a fire extinguishing safety device in a burner, and FIG. 2 is a detailed block diagram of a conventional fire extinguishing safety device. FIG. 8 is a block diagram showing the configuration of a fire extinguishing safety device in a burner according to the present invention. (1) ... Burner, (2) ... Optical fiber, (3) ... Phototransistor, (A) ...
・Combustion flame detection part. Agent Patent Attorney Osamu Kitamura

Claims (1)

【特許請求の範囲】 バーナ(iJ燃焼炎が不測に消火したときに該バーナ(
1)への燃料供給を自動的に遮断させるように構成しで
あるバーナにおける消火安全装置であって、 一端側を前記バーナ(1)の燃焼炎を臨むことのできる
位16に設けた光ファイバー(2)の他端側にスイッチ
ング用フォトトランジスタ(3)を臨ませて成る燃焼炎
検知部(A)を備えていることを特徴とするバーナにお
ける消火安全装置。
[Claims] When the burner (iJ combustion flame is unexpectedly extinguished)
This is a fire extinguishing safety device for a burner configured to automatically cut off the fuel supply to the burner (1), the optical fiber ( 2) A fire extinguishing safety device for a burner, comprising a combustion flame detection section (A) having a switching phototransistor (3) facing the other end.
JP684684A 1984-01-17 1984-01-17 Flame diminishing safety device in burner Pending JPS60149825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP684684A JPS60149825A (en) 1984-01-17 1984-01-17 Flame diminishing safety device in burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP684684A JPS60149825A (en) 1984-01-17 1984-01-17 Flame diminishing safety device in burner

Publications (1)

Publication Number Publication Date
JPS60149825A true JPS60149825A (en) 1985-08-07

Family

ID=11649602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP684684A Pending JPS60149825A (en) 1984-01-17 1984-01-17 Flame diminishing safety device in burner

Country Status (1)

Country Link
JP (1) JPS60149825A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1054215A1 (en) * 1999-05-17 2000-11-22 Daewoo Electronics Co., Ltd Boiler with combustion control apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587044B2 (en) * 1979-05-24 1983-02-08 ティーディーケイ株式会社 Positive temperature coefficient thermistor and its manufacturing method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587044B2 (en) * 1979-05-24 1983-02-08 ティーディーケイ株式会社 Positive temperature coefficient thermistor and its manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1054215A1 (en) * 1999-05-17 2000-11-22 Daewoo Electronics Co., Ltd Boiler with combustion control apparatus

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