JPH05322158A - Lack-of-oxygen preventing safety device in combustion equipment - Google Patents

Lack-of-oxygen preventing safety device in combustion equipment

Info

Publication number
JPH05322158A
JPH05322158A JP12619492A JP12619492A JPH05322158A JP H05322158 A JPH05322158 A JP H05322158A JP 12619492 A JP12619492 A JP 12619492A JP 12619492 A JP12619492 A JP 12619492A JP H05322158 A JPH05322158 A JP H05322158A
Authority
JP
Japan
Prior art keywords
flame
oxygen
blower
combustion
lack
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
Application number
JP12619492A
Other languages
Japanese (ja)
Other versions
JP3031588B2 (en
Inventor
Mutsuhiko Takahashi
睦彦 高橋
Kenji Ochiai
健二 落合
Isao Watanabe
勲 渡辺
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.)
Hitachi Appliances Inc
Original Assignee
Hitachi Home Tech 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 Hitachi Home Tech Ltd filed Critical Hitachi Home Tech Ltd
Priority to JP4126194A priority Critical patent/JP3031588B2/en
Publication of JPH05322158A publication Critical patent/JPH05322158A/en
Application granted granted Critical
Publication of JP3031588B2 publication Critical patent/JP3031588B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Regulation And Control Of Combustion (AREA)
  • Control Of Combustion (AREA)
  • Spray-Type Burners (AREA)

Abstract

PURPOSE:To provide a lack-of-oxygen safety device in combustion equipment for use in detecting the lack of oxygen at a specified concentration of oxygen. CONSTITUTION:There are provided a blower 5, a burner 2 oppositely arranged to a gasifier 3 connected to a solenoid pump 11, a flame rod 6 for use in detecting a flame current in a burner flame, and a control unit 13 for stopping combustion when the flame current detected by the flame rod 6 is less than a predetermined lack-of-oxygen sensing level in the case that the number of revolution of the blower 5 is periodically and temporarily increased at a predetermined interval after reduction of the flame current value by a certain degree only under a fine combustion state. Then, under the normal state in which the lack-of-oxygen is less increased, the number of revolutions of the blower 5 is not increased to reduce noise and in addition, when the lack-of-oxygen is increased, the number of revolutions of the blower 5 is periodically and temporarily increased to estimate the lack-of-oxygen in advance, resulting in that the flame current is lowered faster than that under the normal air blowing volume and the lack-of-oxygen sensing level can fulfill a concentration of oxygen.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、酸素欠乏時に燃焼を停
止する燃焼器の酸欠安全装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxygen deficiency safety device for a combustor which stops combustion when oxygen is deficient.

【0002】[0002]

【従来の技術】従来例を図2、図5により説明する。2. Description of the Related Art A conventional example will be described with reference to FIGS.

【0003】バーナの火炎内にフレームロッドを設け、
このフレームロッドと接地電極(炎孔)との間に交流電
圧を印加すると、火炎を取り巻く空気が燃焼に起因して
起こる小規模な爆発によりイオン化され、起電力が発生
し、フレーム電流が流れるが、この炎の整流作用による
フレーム電流が検知され、燃焼状態を検出する燃焼器の
酸欠安全装置が一般的である。
A frame rod is provided in the flame of the burner,
When an AC voltage is applied between the flame rod and the ground electrode (flame hole), the air surrounding the flame is ionized by a small explosion caused by combustion, electromotive force is generated, and flame current flows. Generally, a combustor oxygen deficiency safety device that detects a combustion state by detecting a flame current due to the rectifying action of the flame is common.

【0004】フレーム電流は、図2に示すように、燃焼
量が低い微燃焼になるにつれて低い値となる。しかし、
酸素欠乏燃焼時においては、フレーム電流は、図5に示
すように燃焼量が低い微燃焼の場合には、酸素濃度が低
下しても変化しにくいもので、酸素欠乏検知レベルにな
るまでには規定の酸素濃度よりも低く(16%以下)、
かなり危険な状態にならないと酸素欠乏として検知しな
い。
As shown in FIG. 2, the flame current has a low value as the combustion amount becomes small and the combustion amount becomes small. But,
At the time of oxygen-deficient combustion, the flame current does not easily change even if the oxygen concentration decreases, in the case of slight combustion with a low combustion amount as shown in FIG. Lower than specified oxygen concentration (16% or less),
Unless it is in a very dangerous state, it will not be detected as lack of oxygen.

【0005】燃焼量に応じてフレームロッドの位置を変
えて、安定したフレーム電流で検知することをねらった
もの(例えば、特公平3−37096号公報)や、ま
た、ある燃焼量に置ける酸素濃度の検出を、所定の検出
レベル値よりも大きい準検出レベル値まで低下したと
き、燃焼量を増加させた後のフレーム電流で検知するも
の(例えば、特公平3−78531号公報)が有る。
[0005] The position of the flame rod is changed according to the combustion amount to detect with a stable flame current (for example, Japanese Patent Publication No. 3-37096), and the oxygen concentration at a certain combustion amount. There is a method (for example, Japanese Examined Patent Publication No. 3-78531) in which the flame current after increasing the combustion amount is detected when the detection of No. 1 is reduced to a quasi detection level value larger than a predetermined detection level value.

【0006】[0006]

【発明が解決しようとする課題】上記従来の一般的な燃
焼器の酸欠安全装置では、微燃焼の場合において、酸素
濃度の低下の影響が現れにくく、かなり危険な状態にな
らないと酸素欠乏として検知しない。このように、正常
時のフレーム電流値と酸素欠乏検知時のフレーム電流値
との差が小さいため、燃焼器のバラツキによるフレーム
電流値のバラツキ、又は、燃焼器の寿命によるフレーム
電流値の低下分を考慮に入れると、実際に安全装置を動
作させる酸素欠乏検知レベルの酸素濃度が16%以下に
なり、規定の酸素濃度(16%以上)を満足できない不
具合が有った。また、上記燃焼量に応じてフレームロッ
ドの位置を変えるものは、構造が複雑となり、部品点数
が多くなり、組立て調整に工数が多くかかるという欠点
が有り、酸素濃度の検出を、準検出レベル値まで低下し
たとき、燃焼量を増加させた後のフレーム電流で検知す
るものは、回転数が切り換わり増大した後の送風機の連
続的な騒音が気になるという不具合が有り、この回転数
は高い程早く消火できるが騒音の面からはより不利とな
る。
In the above-mentioned conventional oxygen deficiency safety device for a combustor, in the case of slight combustion, the effect of lowering the oxygen concentration is unlikely to appear, and if there is not a considerably dangerous state, oxygen deficiency occurs. Not detected. In this way, since the difference between the flame current value during normal operation and the flame current value during oxygen deficiency detection is small, there are variations in the flame current value due to variations in the combustor, or a decrease in the flame current value due to the life of the combustor. In consideration of the above, the oxygen concentration at the oxygen deficiency detection level for actually operating the safety device was 16% or less, and there was a problem that the prescribed oxygen concentration (16% or more) could not be satisfied. Further, the one that changes the position of the flame rod according to the combustion amount has a drawback that the structure is complicated, the number of parts is large, and the number of man-hours for assembly and adjustment is large. If the flame current after increasing the combustion amount is detected, the problem that the continuous noise of the blower after switching and increasing the rotation speed is a concern is detected, and this rotation speed is high. The fire can be extinguished quickly, but it is more disadvantageous in terms of noise.

【0007】[0007]

【課題を解決するための手段】本発明は上記課題を解決
するためになされたものであり、バーナの炎中にフレー
ム電流を検知するフレームロッドを挿入して、このフレ
ームロッドとバーナとの間に交流電圧を印加しフレーム
電流を検出するほか微燃焼時にのみフレーム電流値が初
期から或値減少してから所定のインターバルで送風機の
回転数を周期的に一時増加させた時にフレームロッドが
検知するフレーム電流が所定の酸素欠乏検知レベル以下
の時に燃焼を停止させる制御器を備えたものである。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a frame rod for detecting a flame current is inserted into the flame of a burner, and the flame rod is inserted between the flame rod and the burner. In addition to detecting the flame current by applying AC voltage to the flame, the flame rod detects it when the blower rotation speed is cyclically increased at a predetermined interval after the flame current value has decreased from the initial value or only during slight combustion. It is provided with a controller that stops combustion when the flame current is below a predetermined oxygen deficiency detection level.

【0008】また、微燃焼時に送風機の通常の回転時の
フレーム電流値が所定のインターバルで送風機の回転数
を周期的に一時増加させた時のフレーム電流値より大き
くなった時に燃焼を停止させる制御器を備えてもよい。
Further, control for stopping combustion when the flame current value during normal rotation of the blower during slight combustion becomes larger than the flame current value when the rotational speed of the blower is temporarily temporarily increased at predetermined intervals. It may be equipped with a container.

【0009】[0009]

【作用】正常時にフレームロッドが検知するフレーム電
流より、微燃焼時に検知するフレーム電流が或値低くな
ってから、所定のインターバルで送風量を周期的に一時
増加させ、フレームロッドが検知するフレーム電流が所
定の酸素欠乏検知レベル以下の時に、燃焼を停止させる
ので、微燃焼でも酸素欠乏の進行が少ない正常時では、
送風機の回転数を周期的に一時増加させることがなく、
送風機の騒音は増大せず、更に酸素欠乏が進んだところ
で送風機の回転数を周期的に一時増加させるので、酸素
欠乏の予告ともなり、通常の送風量より早くフレーム電
流は低下し、危険な酸素欠乏検知レベル以下となったら
遅切れすること無く、安全に燃焼を停止させる。
[Function] The flame current detected by the frame rod is periodically increased temporarily at a predetermined interval after the flame current detected during the slight combustion becomes a certain value lower than the flame current detected by the frame rod under normal conditions. Is below a predetermined oxygen deficiency detection level, the combustion is stopped, so even in the case of slight combustion, in a normal state where the progress of oxygen deficiency is small,
Without temporarily increasing the rotation speed of the blower,
The noise of the blower does not increase, and the number of revolutions of the blower is temporarily increased periodically when oxygen deficiency further progresses, so it also serves as a warning of oxygen deficiency, and the flame current decreases earlier than the normal air flow rate, and dangerous oxygen If it falls below the depletion detection level, combustion will be stopped safely without delay.

【0010】また、微燃焼時に送風機の通常の回転時の
フレーム電流値が所定のインターバルで送風機の回転数
を周期的に一時増加させた時のフレーム電流値より大き
くなった時に燃焼を停止させるものも、通常の送風量に
比べて、バーナの燃焼速度が噴出速度より遅くなり、通
常の送風量より早くフレーム電流は低下し、遅切れする
こと無く、より確実に酸素欠乏を検知できる。
Further, the combustion is stopped when the flame current value during normal rotation of the blower during slight combustion becomes larger than the flame current value at the time of temporarily increasing the rotation speed of the blower at predetermined intervals. Also, compared with the normal air flow rate, the burner combustion speed becomes slower than the jet speed, the flame current decreases earlier than the normal air flow rate, and oxygen deficiency can be detected more reliably without delaying the delay.

【0011】[0011]

【実施例】本発明の燃焼器の酸欠安全装置の一実施例を
図1〜図4により説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the oxygen deficiency safety device for a combustor of the present invention will be described with reference to FIGS.

【0012】図1において、1は燃焼器の本体、2はバ
ーナで、バーナ2は、一端に一次空気孔2aを有し、か
つ上部に炎孔2bを有し、石油等の液体燃料を燃焼する
ため本体1に内設されている。3はノズル3aを有する
気化器で、バーナ2に対設されている。4は内ダクト
で、燃焼室を形成するためバーナ2の後方に設けられて
いる。5は送風量可変の送風機で、バーナ2に送風する
ため本体1の背面に内設されている。6はフレームロッ
ドで、炎孔2bの火炎12を介して流れるフレーム電流
を検知するため、バーナ2の炎孔2bに対設されてい
る。7は支持板で、本体1の手前側に二次空気孔7aを
有し、本体1の背面側に内フィルター8を設け、かつバ
ーナ2を支持している。9は温風出口で、本体1の前面
に設けられている。10は送風ダクトで、内ダクト4及
び送風機5の上方から温風出口9上部に亘って送風を仕
切るため、本体1に取付けられている。11は油量可変
な電磁ポンプで、気化器3に接続されている。13は燃
焼器を制御する制御器で、制御器13は、タイマー機能
を有するマイクロコンピュータからなるもので、フレー
ムロッド6が検知したフレーム電流が酸素欠乏検知レベ
ルのフレーム電流になった時、バーナ2を消火させるた
め、前記気化器3、送風機5、フレームロッド6、及び
電磁ポンプ11と接続され、酸欠安全装置の機能を有し
ている。
In FIG. 1, reference numeral 1 is a main body of a combustor, 2 is a burner, and the burner 2 has a primary air hole 2a at one end and a flame hole 2b at an upper portion, and burns a liquid fuel such as petroleum. In order to do so, it is internally provided in the main body 1. Reference numeral 3 denotes a vaporizer having a nozzle 3a, which is opposed to the burner 2. An inner duct 4 is provided behind the burner 2 to form a combustion chamber. Reference numeral 5 denotes a blower with a variable blow rate, which is internally provided on the back surface of the main body 1 to blow air to the burner 2. Reference numeral 6 is a frame rod, which is provided opposite to the flame hole 2b of the burner 2 in order to detect the flame current flowing through the flame 12 of the flame hole 2b. A support plate 7 has a secondary air hole 7a on the front side of the main body 1, an inner filter 8 is provided on the rear side of the main body 1, and supports the burner 2. A hot air outlet 9 is provided on the front surface of the main body 1. A blower duct 10 is attached to the main body 1 to partition the blown air from above the inner duct 4 and blower 5 to the upper part of the hot air outlet 9. An electromagnetic pump 11 having a variable oil amount is connected to the carburetor 3. Reference numeral 13 is a controller for controlling the combustor. The controller 13 is composed of a microcomputer having a timer function. When the flame current detected by the flame rod 6 reaches a flame current of an oxygen deficiency detection level, the burner 2 In order to extinguish the fire, it is connected to the vaporizer 3, the blower 5, the frame rod 6, and the electromagnetic pump 11, and has a function of an oxygen deficiency safety device.

【0013】次に本実施例の動作について説明する。Next, the operation of this embodiment will be described.

【0014】上記燃焼器の酸欠安全装置に電源を入れる
と、気化器3に通電され、気化器3が気化温度になる
と、電磁ポンプ11に通電され中間の油量で供給され、
その供給された油は、気化器3で気化され、気化ガスは
ノズル3aからバーナ2に噴出される。
When the power of the oxygen deficiency safety device for the combustor is turned on, the carburetor 3 is energized, and when the carburetor 3 reaches the vaporization temperature, the electromagnetic pump 11 is energized and an intermediate amount of oil is supplied.
The supplied oil is vaporized by the vaporizer 3, and the vaporized gas is ejected from the nozzle 3a to the burner 2.

【0015】燃焼用の空気は送風機5から内フィルター
8を通りバーナ2回りに押し込まれた空気が一次空気孔
2aと二次空気孔7aに分れ、ノズル3aからの噴出力
により一次空気孔2aから一次空気として吸引され、こ
の一次空気と気化ガスはバーナ2内で予混合され、バー
ナ2の炎孔2bから噴出し、ここで二次空気孔7aから
の二次空気と混合し燃焼し火炎12を形成する。
In the combustion air, the air that has been pushed around the burner 2 from the blower 5 through the inner filter 8 is divided into the primary air holes 2a and the secondary air holes 7a, and the primary air holes 2a are ejected by the nozzle 3a. Is sucked as primary air from the burner 2, the primary air and the vaporized gas are premixed in the burner 2 and ejected from the flame hole 2b of the burner 2, where they are mixed with the secondary air from the secondary air hole 7a to burn and burn. 12 is formed.

【0016】温風用の空気は送風機5から内ダクト4と
送風ダクト10の間を通り送風され、内ダクト4の出口
で火炎12より上昇する排気ガスと混合し、温風出口9
から室内へ温風となって吹き出す。
The warm air is blown from the blower 5 between the inner duct 4 and the blow duct 10, and is mixed with the exhaust gas rising from the flame 12 at the outlet of the inner duct 4, and the warm air outlet 9
Blows into the room as warm air.

【0017】前記火炎12はフレームロッド6を包むよ
うに形成され、このフレームロッド6と接地電極(バー
ナ2)との間に交流電圧を印加すると、炎の整流作用に
より、フレームロッド6はフレーム電流を検知して、燃
焼状態を検出する。このフレーム電流は図2に示すごと
く、燃焼量によっても、空燃比(一次空気率)によって
も変化し、燃焼量が少ないとフレーム電流値も小さい。
The flame 12 is formed so as to surround the frame rod 6, and when an AC voltage is applied between the frame rod 6 and the ground electrode (burner 2), the flame rectifying action causes the frame rod 6 to generate a frame current. The combustion state is detected. As shown in FIG. 2, the flame current changes depending on the combustion amount and the air-fuel ratio (primary air ratio), and when the combustion amount is small, the flame current value is also small.

【0018】またフレーム電流値は、室内の酸素濃度に
よっても図3又は図5のごとく変化し、酸素検知はこの
フレーム電流の下がった値で検知するものである。しか
しながら燃焼量が低い微燃焼量の場合は酸素濃度が低下
してもフレーム電流値の低下量が少なく、検知に最小限
必要なフレーム電流値差である検知レベルでは16%以
下となり、遅切れする。この遅切れを防止するために送
風機5の回転数を一時増加させるインターバルを周期的
に繰り返すことにより、図3に示すごとく回転数大・中
等と増加時の酸欠特性を利用したもので、通常の回転数
に比べ早く燃焼速度より噴出速度大の状態に移行でき、
フレーム電流を早く低下させて遅切れを防止できるもの
である。
Further, the flame current value also changes depending on the oxygen concentration in the room as shown in FIG. 3 or FIG. 5, and the oxygen detection is performed by detecting the lowered value of the flame current. However, when the combustion amount is low and the combustion amount is low, the amount of decrease in the flame current value is small even if the oxygen concentration is low, and the detection level, which is the minimum flame current value difference required for detection, is 16% or less, and there is a delay. . In order to prevent this delay, the interval for temporarily increasing the rotation speed of the blower 5 is periodically repeated to utilize the oxygen deficiency characteristic when the rotation speed is large / medium and increases, as shown in FIG. It is possible to shift to a state in which the ejection speed is higher than the combustion speed faster than
The frame current can be quickly reduced to prevent late disconnection.

【0019】また、送風量増加のインターバルは、図4
に示すごとく正常時のフレーム電流から或値(数μA)
下がったフレーム電流になってから、掛けることによ
り、酸素欠乏の進行しない正常時では、送風量の増加の
インターバルは掛からないので、送風機5の騒音は気に
ならない。また、室内の酸素欠乏が進んだ時期に送風量
の増加のインターバルが掛かり、送風機5の回転数増加
による騒音は酸素欠乏の予告になるが、このときの騒音
も少しでも低いほど好ましく、図3中のAよりも低い回
転数のBでインターバルを掛け、遅切れとならないため
にも通常時のフレーム電流(If0)以下のインターバ
ル時のフレーム電流(If1)で制御機13を酸欠安全
装置として作動し、燃焼を停止するので更に安全性を高
めることが出来る。
The interval for increasing the air flow is shown in FIG.
As shown in the figure, from the normal frame current to a certain value (several μA)
When the flame current is lowered and then applied, the interval of increase of the blown air does not occur in the normal time when the oxygen deficiency does not progress, so the noise of the blower 5 is not a concern. Further, when the oxygen deficiency in the room progresses, an interval for increasing the blower amount is taken, and the noise due to the increase in the number of revolutions of the blower 5 gives a notice of the oxygen deficiency. The interval is multiplied by B, which has a lower rotation speed than A, and the controller 13 is protected from oxygen deficiency with a frame current (If 1 ) at an interval equal to or less than the normal frame current (If 0 ) in order to prevent a delay. Since it operates as a device and stops combustion, the safety can be further enhanced.

【0020】[0020]

【発明の効果】以上本発明によると、複雑な構成とする
ことなく、正常時にフレームロッドが検知するフレーム
電流より、微燃焼時に検知するフレーム電流が或値低く
なってから、所定のインターバルで送風量を周期的に一
時増加させ、フレームロッドが検知するフレーム電流が
所定の酸素欠乏検知レベル以下の時に、燃焼を停止させ
るものとしただけで、酸素欠乏の進行が少ない正常時で
は、送風機の回転数を周期的に一時増加させることがな
いので、送風機の騒音は気にならない。フレーム電流が
或値低くなり酸素欠乏が進んだところで送風機の回転数
を周期的に一時増加させるので、酸素欠乏の予告もでき
る。更に酸素欠乏が進むと通常の送風量より早くフレー
ム電流は低下し、遅切れすること無く、酸素欠乏検知レ
ベルは規定の酸素濃度(16%以上)を満足させること
ができる。
As described above, according to the present invention, without making a complicated structure, the flame current detected at the time of slight combustion is sent at a predetermined interval after the flame current detected at the time of slight combustion is lower than the flame current detected at the normal time by a predetermined interval. When the flame current detected by the flame rod is below the predetermined oxygen deficiency detection level, the combustion is stopped only by temporarily increasing the air flow periodically. Blower noise is not a concern as the number is not increased temporarily. When the flame current is lowered by a certain value and oxygen deficiency progresses, the rotational speed of the blower is temporarily increased periodically, so that the oxygen deficiency can be announced. When the oxygen deficiency further progresses, the flame current decreases earlier than the normal air flow rate, and without delaying, the oxygen deficiency detection level can satisfy the specified oxygen concentration (16% or more).

【0021】また、微燃焼時に送風機の通常の回転時の
フレーム電流値が、所定のインターバルで送風機の回転
数を周期的に一時増加させ通常の送風量より早く低下す
るフレーム電流値より大きくなった時に燃焼を停止させ
るので、遅切れすること無く、確実に消火することがで
きる。
Further, the flame current value during normal rotation of the blower during slight combustion becomes larger than the flame current value that decreases the speed of the blower faster than normal by temporarily increasing the rotation speed of the blower at predetermined intervals. Since the combustion is sometimes stopped, it is possible to extinguish the fire without delay.

【0022】従って、安全で、使い勝手の良い燃焼器の
酸欠安全装置を提供できる効果が有る。
Therefore, there is an effect that a safe and convenient combustor oxygen deficiency safety device can be provided.

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

【図1】本発明の一実施例を示す酸欠安全装置付燃焼器
の断面図である。
FIG. 1 is a sectional view of a combustor with an oxygen deficiency safety device according to an embodiment of the present invention.

【図2】本発明の一実施例を示す燃焼器の酸欠安全装置
の空燃比とフレーム電流の検知特性図である。
FIG. 2 is a detection characteristic diagram of an air-fuel ratio and a flame current of an oxygen deficiency safety device for a combustor showing an embodiment of the present invention.

【図3】本発明の一実施例を示す燃焼器の酸欠安全装置
の回転数変化時の酸素欠乏検知特性図である。
FIG. 3 is a characteristic diagram of oxygen deficiency detection when the rotation speed of the oxygen deficiency safety device for a combustor according to an embodiment of the present invention is changed.

【図4】本発明の一実施例を示す燃焼器の酸欠安全装置
の酸素欠乏検知特性図である。
FIG. 4 is an oxygen deficiency detection characteristic diagram of an oxygen deficiency safety device for a combustor showing an embodiment of the present invention.

【図5】従来の例を示す燃焼器の酸欠安全装置の酸素欠
乏検知特性図である。
FIG. 5 is an oxygen deficiency detection characteristic diagram of a conventional oxygen deficiency safety device for a combustor.

【符号の説明】[Explanation of symbols]

2 バーナ 3 気化器 5 送風機 6 フレームロッド 11 電磁ポンプ 13 制御器 2 Burner 3 Vaporizer 5 Blower 6 Frame rod 11 Electromagnetic pump 13 Controller

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 送風量可変に送風する送風機(5)と、
油量可変に送油する電磁ポンプ(11)と、この電磁ポ
ンプ(11)と接続した気化器(3)と、この気化器
(3)に対設したバーナ(2)と、このバーナ(2)の
炎中に挿入されてフレーム電流を検知するフレームロッ
ド(6)と、このフレームロッド(6)と前記バーナ
(2)との間に交流電圧を印加するほか微燃焼時にのみ
フレーム電流値が初期から或値減少してから所定のイン
ターバルで前記送風機の回転数を周期的に一時増加させ
た時に前記フレームロッドが検知するフレーム電流が所
定の酸素欠乏検知レベル以下の時に燃焼を停止させる制
御器(13)とを備えたことを特徴とする燃焼器の酸欠
安全装置。
1. A blower (5) for blowing a variable amount of air,
An electromagnetic pump (11) for variable oil supply, a carburetor (3) connected to the electromagnetic pump (11), a burner (2) opposite to the carburetor (3), and the burner (2) ) Is inserted in the flame to detect the flame current, and an AC voltage is applied between the flame rod (6) and the burner (2). A controller that stops combustion when the flame current detected by the flame rod when the rotational speed of the blower is cyclically increased at a predetermined interval after a certain decrease from the initial stage is below a predetermined oxygen deficiency detection level. (13) An oxygen-deficient safety device for a combustor, comprising:
【請求項2】 前記制御器は、微燃焼時に前記送風機の
通常の回転時のフレーム電流値が所定のインターバルで
前記送風機の回転数を周期的に一時増加させた時のフレ
ーム電流値より大きくなった時に燃焼を停止させるもの
としたことを特徴とする請求項1記載の燃焼器の酸欠安
全装置。
2. The controller causes the flame current value during normal rotation of the blower during slight combustion to become greater than the flame current value when the rotation speed of the blower is temporarily increased at predetermined intervals. 2. The oxygen deficiency safety device for a combustor according to claim 1, wherein the combustion is stopped when the combustion starts.
JP4126194A 1992-05-19 1992-05-19 Oxygen deficiency safety device for combustor Expired - Fee Related JP3031588B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4126194A JP3031588B2 (en) 1992-05-19 1992-05-19 Oxygen deficiency safety device for combustor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4126194A JP3031588B2 (en) 1992-05-19 1992-05-19 Oxygen deficiency safety device for combustor

Publications (2)

Publication Number Publication Date
JPH05322158A true JPH05322158A (en) 1993-12-07
JP3031588B2 JP3031588B2 (en) 2000-04-10

Family

ID=14929030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4126194A Expired - Fee Related JP3031588B2 (en) 1992-05-19 1992-05-19 Oxygen deficiency safety device for combustor

Country Status (1)

Country Link
JP (1) JP3031588B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011247458A (en) * 2010-05-25 2011-12-08 Rinnai Corp Hot air heater
WO2021118152A1 (en) * 2019-12-12 2021-06-17 주식회사 경동나비엔 Water heater and method for controlling same

Also Published As

Publication number Publication date
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