JP2948725B2 - Combustion detector - Google Patents
Combustion detectorInfo
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- JP2948725B2 JP2948725B2 JP31256693A JP31256693A JP2948725B2 JP 2948725 B2 JP2948725 B2 JP 2948725B2 JP 31256693 A JP31256693 A JP 31256693A JP 31256693 A JP31256693 A JP 31256693A JP 2948725 B2 JP2948725 B2 JP 2948725B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- amount
- detecting
- flame
- voltage
- Prior art date
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Description
【０００１】[0001]
【産業上の利用分野】この発明はファンヒータ等の燃焼
器の燃焼検出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 a combustion detector for a combustor such as a fan heater.
【０００２】[0002]
【従来の技術】従来よりファンヒータ等の燃焼器では、
室内で燃焼しその燃焼ガスを室内に放出して暖房するた
め、常に炎の着火や失火及び室内の酸素濃度の低下を検
知する燃焼検出装置が必要となり、その燃焼検出装置の
検知方法としてフレームロッドとアース間に電圧を印加
し、炎の電気的整流作用を利用して燃焼している炎の状
態を検知するフレームロッドセンサーによる検知方法が
一般的に行われている。このフレームロッドセンサーに
よる検知は、燃焼量が小さくなって炎が小さくなってい
くと検出値自体が小さくなると共に炎の揺らぎ等により
検出値が不安定になり、酸欠検出の時に酸欠状態ではな
いのに酸欠状態と判断して燃焼を停止してしまうことが
あり、これを防止するため酸欠状態を検出する間強燃焼
にしてフレームロッドセンサーの出力を安定させて酸欠
状態の有無を判断していた。2. Description of the Related Art Conventionally, in a combustor such as a fan heater,
Since it burns indoors and emits the combustion gas into the room to heat it, a combustion detection device that constantly detects the ignition and misfire of the flame and a decrease in the oxygen concentration in the room is required, and a flame rod is used as a detection method of the combustion detection device. A detection method using a flame rod sensor for detecting a state of a burning flame by applying a voltage between the flame and an earth and utilizing an electric rectifying action of the flame is generally performed. In the detection by this flame rod sensor, the detection value itself becomes smaller as the combustion amount decreases and the flame becomes smaller, and the detection value becomes unstable due to fluctuation of the flame, etc. When there is no oxygen deficiency, the combustion may be stopped due to the lack of oxygen.To prevent this, use strong combustion while detecting the oxygen deficiency to stabilize the output of the flame rod sensor and check for the presence of an oxygen deficiency. Was determined.
【０００３】[0003]
【発明が解決しようとする課題】しかし、このような従
来の燃焼検出装置では、近年の住宅構造の高断熱化・個
別暖房化が進んだことにより、暖房能力の強弱特性によ
り弱燃焼での動作が求められ燃焼量もより細かい制御が
求められており、またより低騒音化のものが求められて
いるのに対し、酸欠検出を行う時強燃焼にする従来の方
法だと室温の上昇を招いたり騒音が増加するなどの欠点
があった。However, in such a conventional combustion detecting device, due to the recent progress of high heat insulation and individual heating of the housing structure, the characteristics of the heating capacity are weak . The conventional method of using strong combustion when performing oxygen deficiency detection, while operating in weak combustion and requiring finer control of the amount of combustion are also required, and low noise is required. However, there were drawbacks such as an increase in room temperature and an increase in noise.
【０００４】[0004]
【問題点を解決するための手段】この発明はこの点に着
目し、上記欠点を解決する為に、特にその構成を、燃焼
量を検知する燃焼量検知手段と、燃焼状態をフレームロ
ッドセンサーからの検出値により検出する燃焼状態検出
手段と、前記燃焼状態検出手段からの検出値が予め設定
した基準値より低い時異常値と判断しその異常値の継続
時間が燃焼量に応じて設定された設定時間を越えた時燃
焼を停止させる出力を出す異常検知手段とからなる燃焼
検出装置としたものである。The present invention pays attention to this point, and in order to solve the above-mentioned drawbacks, in particular, the constitution is made up of a combustion amount detecting means for detecting a combustion amount and a combustion state from a flame rod sensor. And the duration of the abnormal value is determined according to the amount of combustion when the detected value from the combustion state detecting means is lower than a predetermined reference value. This is a combustion detection device comprising abnormality detection means for outputting an output for stopping combustion when a set time is exceeded.
【０００５】[0005]
【作用】燃焼量の増減に応じて酸欠検出の時の酸欠状態
と判断する異常値の継続時間の設定時間の長さを、燃焼
量が増加するに従って短くし燃焼量が減少するに従って
長くする制御を行うものである。 According to the present invention , the length of time for setting the duration of the abnormal value determined to be in an oxygen deficiency state upon detection of oxygen deficiency in response to an increase or decrease in the amount of combustion is shortened as the amount of combustion increases and is increased as the amount of combustion decreases Is performed.
【０００６】[0006]
【実施例】次に、この発明に係る燃焼検出装置を図面に
示された好適な一実施例で説明する。１は室温検出手段
で、温度センサー等により室温を検知してその検出値を
出力するものである。２は温度設定手段で、操作部（図
示せず）に設けられ、使用者が希望の室温を設定し、そ
の希望温度を出力するものである。４は燃焼手段で、図
３のように燃油が気化され空気と混合されてバーナ５の
網目６より噴出し、この混合気を点火電極７にて着火
し、燃焼炎を燃焼筒８内に形成するものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A combustion detecting device according to the present invention will be described below with reference to a preferred embodiment shown in the drawings. Reference numeral 1 denotes room temperature detecting means for detecting room temperature by a temperature sensor or the like and outputting the detected value. Reference numeral 2 denotes a temperature setting means which is provided in an operation unit (not shown) and sets a desired room temperature by a user and outputs the desired room temperature . Numeral 4 denotes a combustion means, as shown in FIG. 3, in which fuel oil is vaporized and mixed with air, and is ejected from a mesh 6 of a burner 5, and this mixture is ignited by an ignition electrode 7 to form a combustion flame in a combustion cylinder 8. Is what you do.
【０００７】９は燃焼検出装置で、燃焼量を検知する燃
焼量検知手段１０と、フレームロッドセンサー１１にて
炎を検知する燃焼状態検出手段１２と、前記燃焼量検知
手段１０からの燃焼量のデータにより酸欠検出時の酸欠
状態と判断する異常値の継続時間の設定時間〓ｔを設定
・変更すると共に、前記燃焼状態検出手段１２からの検
出値が異常値で、この異常値が設定時間〓ｔを越えて継
続した時燃焼を停止させる出力を出す異常検知手段１３
より構成されている。１４は燃焼制御手段で、室温設定
手段２より温度が設定されてその温度の設定値が出力さ
れるとその設定値と室温検知手段１からの検出値とを比
較してその設定温度になるよう燃焼手段４の燃焼量を制
御する。また、燃焼量検知手段１０に今現在の燃焼量を
出力すると共に、異常検知手段１３より燃焼停止の出力
が出されると直ちに燃焼手段４の燃焼を停止させる。Reference numeral 9 denotes a combustion detecting device, which is a combustion amount detecting means 10 for detecting a combustion amount, a combustion state detecting means 12 for detecting a flame by a flame rod sensor 11, and a combustion amount detecting means 10 for detecting the combustion amount from the combustion amount detecting means 10. The set time Δt of the duration of the abnormal value determined to be in the oxygen deficiency state upon detection of the oxygen deficiency is set / changed, and the detected value from the combustion state detecting means 12 is an abnormal value. Abnormality detection means 13 that outputs an output to stop combustion when continued for more than time Δt
It is composed of Numeral 14 denotes a combustion control unit, which sets a temperature by the room temperature setting unit 2 and outputs a set value of the temperature, compares the set value with a detection value from the room temperature detecting unit 1 so as to reach the set temperature. The combustion amount of the combustion means 4 is controlled. Further, the current combustion amount is output to the combustion amount detection means 10 and the combustion of the combustion means 4 is stopped immediately when the output of the combustion stop is output from the abnormality detection means 13.
【０００８】以上のように構成された燃焼検出装置の動
作を説明する。使用者が操作部の温度設定手段２により
希望の室温を設定して運転を開始すると、始動時には室
温は設定温度より低いので、燃焼制御手段１４は最初燃
焼量を「強」にして燃焼を開始し、室温が上昇して設定
温度に近づくにつれ、燃焼量を「強」から「弱」そして
「微」へと少なくしていく。（図４）[0008] The operation of the combustion detecting device configured as described above will be described. When the user sets the desired room temperature with the temperature setting means 2 of the operation section and starts the operation, the combustion control means 14 initially sets the combustion amount to "strong" and starts the combustion because the room temperature is lower than the set temperature at the start. Then, as the room temperature rises and approaches the set temperature, the combustion amount is reduced from “strong” to “weak” and “fine”. (FIG. 4)
【０００９】本実施例では、フレームロッドセンサー１
１の出力をフレーム電圧として燃焼状態検出手段１２が
検出し、このフレーム電圧が予め設定した基準電圧であ
る３［Ｖ］より小さくなった時異常電圧として異常検知
手段１３が判断すると共に、この異常電圧が「強」燃焼
（３２００Ｋｃａｌ／ｈ）で１秒、「弱」燃焼（１５０
０Ｋｃａｌ／ｈ）で２秒、そして「微」燃焼（６００Ｋ
ｃａｌ／ｈ）で３秒と各燃焼量に応じて予め設定された
設定時間〓ｔより長く継続した時に酸欠状態と判断して
燃焼を停止する出力を異常検知手段１３が出し、その出
力により燃焼制御手段１４が燃焼を停止する制御を行っ
ており、上記のようにこの酸欠状態と判断するための設
定時間〓ｔは、燃焼量が少なくなるに従って設定時間〓
ｔを長く変更し、燃焼量が多くなるに従って設定時間〓
ｔを短く変更する制御を燃焼検出装置９が行っている。
尚、基準電圧が３［Ｖ］に設定されているのに対して、
「強」燃焼でのフレーム電圧は平均で５［Ｖ］、「弱」
燃焼でのフレーム電圧は平均で４．５［Ｖ］、「微」燃
焼でのフレーム電圧は平均で３．５［Ｖ］である。In this embodiment, the frame rod sensor 1
1 is detected by the combustion state detecting means 12 as a flame voltage, and when the flame voltage becomes smaller than a predetermined reference voltage of 3 [V], the abnormality detecting means 13 determines the abnormal voltage as an abnormal voltage. When the voltage is "strong" combustion (3200 Kcal / h) for 1 second, "weak" combustion (150
0Kcal / h) for 2 seconds, and "micro" combustion (600K
The abnormality detection means 13 outputs an output for judging an oxygen-deficient state and stopping the combustion when 3 seconds at (cal / h) and longer than a preset time Δt preset according to each combustion amount. The combustion control means 14 controls to stop the combustion. As described above, the set time Δt for judging this oxygen-deficient state is set as the combustion time decreases.
t is changed to a longer time, and the set time 多 く
The combustion detection device 9 performs control to shorten t.
Note that while the reference voltage is set to 3 [V],
Flame voltage in "strong" combustion is 5 [V] on average, "weak"
The flame voltage in combustion is 4.5 [V] on average, and the flame voltage in "fine" combustion is 3.5 [V] on average.
【００１０】したがって、燃焼量が「強」から「弱」そ
して「微」へと減少していった時、燃焼制御手段１４か
ら燃焼量検知手段１０へ減少した燃焼量が出力され、そ
れにより異常検知手段１３が燃焼量の変化を検知して
（ステップ１５）、更にその変化が増加・減少のうち減
少したと判断して（ステップ１６）、酸欠状態であると
判断するための異常電圧の継続時間の設定時間〓ｔを燃
焼量が「強」から「弱」そして「微」へと減少するに従
って１秒から２秒そして３秒へと長く変更する制御を燃
焼検出装置９が行う。（ステップ１７）逆に燃焼量が
「微」から「弱」そして「強」へと増加していった時、
燃焼制御手段１４から燃焼量検知手段１０へ増加した燃
焼量が出力され、それにより異常検知手段１３が燃焼量
の変化を検知して（ステップ１５）、更にその変化が増
加・減少のうち増加したと判断して（ステップ１６）、
酸欠状態であると判断するための異常電圧の継続時間の
設定時間〓ｔを燃焼量が「微」から「弱」そして「強」
へと増加するに従って３秒から２秒そして１秒へと短く
変更する制御を燃焼検出装置９が行う。（ステップ１
７）Therefore, when the amount of combustion decreases from "strong" to "weak" and "fine", the reduced amount of combustion is output from the combustion control means 14 to the combustion amount detecting means 10, thereby causing an abnormality. The detecting means 13 detects a change in the amount of combustion (step 15), further judges that the change has decreased among increases or decreases (step 16), and sets an abnormal voltage for judging that the state is an oxygen deficiency state. The combustion detection device 9 performs control to change the set time Δt of the continuation time from 1 second to 2 seconds and 3 seconds as the combustion amount decreases from “strong” to “weak” and “fine”. (Step 17) Conversely, when the combustion amount increases from “fine” to “weak” and “strong”,
The increased combustion amount is output from the combustion control unit 14 to the combustion amount detection unit 10, whereby the abnormality detection unit 13 detects a change in the combustion amount (step 15), and the change has increased in the increase or decrease. (Step 16)
The set time Δt of the duration of the abnormal voltage for judging the state of oxygen deficiency is changed from “small” to “weak” to “strong”
The combustion detection device 9 performs a control of shortening from 3 seconds to 2 seconds and 1 second as the number increases. (Step 1
7)
【００１１】これにより燃焼量が多い程フレーム電圧が
大きく安定するので、フレーム電圧が基準電圧より小さ
い異常電圧が例えば「強」燃焼で１秒より長く継続した
とき、直ちに酸欠状態が発生したと判断して燃焼を停止
し、アラーム音などで使用者に換気をするよう報知して
事故を未然に防ぐことができる。また、燃焼量が少ない
程フレーム電圧が小さく不安定となり、酸欠状態でなく
てもフレーム電圧が基準電圧より小さい異常電圧の発生
が多くしかも継続時間が長く検出されるため、燃焼量が
少なくなる程設定時間〓ｔを長く変更することにより、
異常電圧が例えば「微」燃焼で３秒と長く変更した設定
時間〓ｔを経過した時に酸欠状態と判断して燃焼を停止
し、アラーム音などで使用者に換気をするよう報知し
て、燃焼量が少ないときの酸欠検出での燃焼停止の誤動
作を防止できると共に、より少ない燃焼量での運転を可
能にして細かい燃焼制御を行うことができる。尚、本実
施例では燃焼状態の変化を電圧変化に変換して検知して
いたが、これに限定されず、燃焼状態の変化を電流変化
に変換して検知してもよい。又、本実施例では燃焼検出
装置９と燃焼制御手段１４を別々に構成したが、これに
限定されず、マイクロチップなどで１つの部品にて構成
してもよい。As a result, the flame voltage increases and stabilizes as the amount of combustion increases. Therefore, when an abnormal voltage in which the flame voltage is smaller than the reference voltage continues for more than 1 second in, for example, "strong" combustion, it is assumed that an oxygen-deficient state occurs immediately. Judgment can be stopped by judging, and the user can be notified to ventilate by alarm sound or the like, thereby preventing an accident. Further, as the combustion amount is small, the flame voltage is small and unstable, and the abnormal voltage whose flame voltage is smaller than the reference voltage is generated more frequently and the duration is detected longer even in the absence of oxygen deficiency, so that the combustion amount is reduced. By changing the setting time Δt longer,
When the abnormal voltage elapses a set time Δt that has been changed to as long as 3 seconds for “fine” combustion, for example, it is determined that the state is oxygen-deficient, combustion is stopped, and a user is notified by an alarm sound or the like to ventilate. It is possible to prevent erroneous operation of stopping combustion in the detection of oxygen deficiency when the amount of combustion is small, and to enable operation with a smaller amount of combustion to perform fine combustion control. In the present embodiment, the change in the combustion state is detected by converting it into a voltage change. However, the present invention is not limited to this, and the change in the combustion state may be converted into a current change and detected. In this embodiment, the combustion detection device 9 and the combustion control means 14 are separately configured. However, the present invention is not limited to this, and may be configured by a single component such as a microchip.
【００１２】[0012]
【発明の効果】以上のようにこの発明によれば、燃焼量
を検知する燃焼量検知手段と、燃焼状態をフレームロッ
ドセンサーからの検出値により検出する燃焼状態検出手
段と、前記燃焼状態検出手段からの検出値が予め設定し
た基準値より低い時異常値と判断しその異常値の継続時
間が燃焼量に応じて設定された設定時間を越えたとき燃
焼を停止させる出力を出す異常検知手段とからなる燃焼
検出装置とすることにより、燃焼量が少ない時の酸欠検
出での誤動作による燃焼停止を防止できるとともに、よ
り少ない燃焼量での運転を可能にして細かい燃焼制御を
行うことができ、それによって燃焼量の上下の設定範囲
が大きく、より低騒音の燃焼器を提供できる。As described above, according to the present invention, the combustion amount detecting means for detecting the combustion amount, the combustion state detecting means for detecting the combustion state based on the detection value from the flame rod sensor, and the combustion state detecting means Abnormality detection means for judging an abnormal value when the detected value is lower than a preset reference value and outputting an output for stopping combustion when the duration of the abnormal value exceeds a set time set according to the amount of combustion; By making the combustion detection device consisting of, it is possible to prevent combustion stoppage due to malfunction in the oxygen deficiency detection when the combustion amount is small, and it is possible to perform operation with a smaller combustion amount and perform fine combustion control, Thereby, the setting range of the upper and lower combustion amounts is large, and a lower noise combustor can be provided.
【図１】この発明一実施例を付した燃焼器のブロック
図。FIG. 1 is a block diagram of a combustor provided with an embodiment of the present invention.
【図２】同フローチャート図。FIG. 2 is a flowchart of the same.
【図３】同要部断面図。FIG. 3 is a sectional view of the main part.
【図４】同フレーム電圧と燃焼量の関係を示す特性図。FIG. 4 is a characteristic diagram showing the relationship between the flame voltage and the amount of combustion.
９ 燃焼検出装置 １０ 燃焼量検知手段 １１ フレームロッドセンサー １２ 燃焼状態検出手段 １３ 異常検知手段 Reference Signs List 9 combustion detection device 10 combustion amount detection means 11 flame rod sensor 12 combustion state detection means 13 abnormality detection means
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平１−106748（ＪＰ，Ｕ) 実開 平２−133544（ＪＰ，Ｕ) 特許2696176（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) F23N 5/02 343 F23N 5/08 F23N 5/12 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Utility Model No. 1-106748 (JP, U) Japanese Utility Model Application No. 2-133544 (JP, U) Patent 2696176 (JP, B2) (58) Fields investigated (Int. Cl. 6 , DB name) F23N 5/02 343 F23N 5/08 F23N 5/12
Claims (1)
と、燃焼状態をフレームロッドセンサー１１からの検出
値により検出する燃焼状態検出手段１２と、前記燃焼状
態検出手段１２からの検出値が予め設定した基準値より
低い時異常値と判断しその異常値の継続時間が燃焼量に
応じて設定された設定時間を越えた時燃焼を停止させる
出力を出す異常検知手段１３とからなる燃焼検出装置。1. A combustion amount detecting means 10 for detecting a combustion amount.
A combustion state detecting means 12 for detecting a combustion state based on a detection value from the flame rod sensor 11, and an abnormal value when the detection value from the combustion state detecting means 12 is lower than a predetermined reference value. A combustion detecting device which outputs an output for stopping combustion when the duration of the time exceeds a set time set in accordance with the amount of combustion .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31256693A JP2948725B2 (en) | 1993-11-17 | 1993-11-17 | Combustion detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31256693A JP2948725B2 (en) | 1993-11-17 | 1993-11-17 | Combustion detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07139730A JPH07139730A (en) | 1995-05-30 |
| JP2948725B2 true JP2948725B2 (en) | 1999-09-13 |
Family
ID=18030764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31256693A Expired - Fee Related JP2948725B2 (en) | 1993-11-17 | 1993-11-17 | Combustion detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2948725B2 (en) |
-
1993
- 1993-11-17 JP JP31256693A patent/JP2948725B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07139730A (en) | 1995-05-30 |
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