JPH0490417A - Combustion detector - Google Patents
Combustion detectorInfo
- Publication number
- JPH0490417A JPH0490417A JP2204722A JP20472290A JPH0490417A JP H0490417 A JPH0490417 A JP H0490417A JP 2204722 A JP2204722 A JP 2204722A JP 20472290 A JP20472290 A JP 20472290A JP H0490417 A JPH0490417 A JP H0490417A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- oxygen deficiency
- section
- weak
- during
- 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 301
- 206010021143 Hypoxia Diseases 0.000 claims abstract description 100
- 238000001514 detection method Methods 0.000 claims description 50
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 abstract description 14
- 239000001301 oxygen Substances 0.000 abstract description 14
- 230000002950 deficient Effects 0.000 abstract 1
- 230000027734 detection of oxygen Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 101000852483 Homo sapiens Interleukin-1 receptor-associated kinase 1 Proteins 0.000 description 1
- 102100036342 Interleukin-1 receptor-associated kinase 1 Human genes 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000009423 ventilation 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
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Regulation And 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、温風暖葛器等の燃焼検出装置に関するもの
で、特に微弱燃焼どきの酸欠検出特性の改良を図ったも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a combustion detection device for hot air heaters and the like, and is particularly aimed at improving the oxygen deficiency detection characteristics during weak combustion.
近年、石油ファンヒーター等の家庭用温風暖房器は、普
及率の増加に伴い、狭い部屋で使用されたり、秋口また
は春光などの比較的暖かい時期に使用される機会が多く
なってきたため、それに使用される燃焼器も燃焼量を絞
り込んだときの下限の燃焼量をできるだけ少なくすると
いうことが望まれている。In recent years, household hot air heaters such as kerosene fan heaters have become more popular, and they are often used in small rooms or during relatively warm seasons such as early autumn or spring light. It is desired that the combustor used also has a lower limit combustion amount as small as possible when the combustion amount is narrowed down.
燃焼量を低下させるためには、燃焼器の特性も去ること
ながら、安全性確保のため安定した酸欠検出を行うこと
ができる燃焼検出装置が必要とされていた。In order to reduce the amount of combustion, there is a need for a combustion detection device that can perform stable oxygen deficiency detection to ensure safety while also reducing the characteristics of the combustor.
従来この種の燃焼検出装置は、例えば特開平1−263
415号公報に示されているとおり、弱燃焼時に燃焼検
出部からの信号Vfが、酸欠等の異常燃焼により、弱燃
焼時の酸欠レベル■1以下になったとき、短時間だけ強
制的に強撚焼とし、炎の整流作用を良好にして燃焼検出
部からの出力が充分得られる状態にしてから強撚焼時の
酸欠レベルと比較するという酸欠検出方法をとっていた
。Conventionally, this type of combustion detection device is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-263.
As indicated in Publication No. 415, when the signal Vf from the combustion detection part during weak combustion becomes less than the oxygen deficiency level ■1 due to abnormal combustion such as oxygen deficiency, the The method of detecting oxygen deficiency was to use strong twist firing to obtain a good flame rectification effect so that a sufficient output from the combustion detection section could be obtained, and then compare the oxygen deficiency level with the oxygen deficiency level during strong twist firing.
〔発明が解決しようとするfill)
しかしながら従来の装置では、弱燃焼時の燃焼量をさら
に低下させて燃焼させようとl、たとき(ffi弱燃焼
)、炎の整流作用が悪くなり正常時の燃焼検出部からの
信号Vfと酸欠レベルVfとの差が小さくなり、燃焼器
の製造上のバラツキ等によりVfがさらに低下すると、
正常時でも弱燃焼から強撚焼に変化してしまい、燃焼音
が高くなるとともに、室温が上昇するというa題を有し
ていた。[Fill to be solved by the invention] However, in conventional devices, when an attempt is made to further reduce the amount of combustion during weak combustion (ffi weak combustion), the rectifying effect of the flame deteriorates and When the difference between the signal Vf from the combustion detection unit and the oxygen deficiency level Vf becomes small, and Vf further decreases due to manufacturing variations in the combustor, etc.
Even under normal conditions, the firing changes from weak combustion to strong twist firing, resulting in an increase in combustion noise and a rise in room temperature.
また、上記課題を解決するために、酸欠レベルVfを低
い値に設定すると、酸欠状態になって異常燃焼になって
もVfがVmpi下にならないため、強撚焼にならず、
燃焼を停止しないため酸欠事故を引き起こすなど安全上
の問題点があった。In addition, in order to solve the above problem, if the oxygen deficiency level Vf is set to a low value, even if an oxygen deficiency state occurs and abnormal combustion occurs, Vf will not fall below Vmpi, so strong twist firing will not occur.
There were safety issues such as oxygen deficiency accidents because the combustion did not stop.
この発明は、上記のような!!題を解消するためになさ
れたもので、弱燃焼時の燃焼量をさらに低下させて微弱
燃焼にして燃焼させても、不必要に強撚焼にしたりする
ことなく、正確な酸欠判定を行うことができる燃焼検出
装置5?得ることを目的としている。This invention is like the above! ! This was done to solve the problem, and even if the combustion amount during weak combustion is further reduced and combustion is performed in weak combustion, it is possible to accurately determine oxygen deficiency without causing unnecessary strong twist firing. Combustion detection device 5? The purpose is to obtain.
この発明は、上記目的を達成するため、燃焼部の燃焼量
が微弱燃焼中に周期的に短時間たけ弱燃焼とするよう燃
焼制御部にインターバル信号を送るインターバル信号発
生部と、前記インターバル信号によって弱燃焼時に前記
燃焼検出部からの信号Vfが弱燃焼時の酸欠レベルVf
より低い場合のみ短時間だけ強制的に中燃焼として再度
中燃焼時の酸欠レベルvmと比較し、中燃焼時の酸欠レ
ベル■1以下の場合には、燃焼を停止させろとともに、
中燃焼時の酸欠レベルV1以上の場合には微弱燃焼に戻
す酸欠判定部を設けた構成としである。In order to achieve the above object, the present invention includes an interval signal generating section that sends an interval signal to a combustion control section so that the combustion amount of the combustion section is periodically set to weak combustion for a short period of time during weak combustion; The signal Vf from the combustion detection section during weak combustion is the oxygen deficiency level Vf during weak combustion.
If the oxygen deficiency level is lower than 1, force medium combustion for a short time and compare it again with the oxygen deficiency level vm during medium combustion, and if the oxygen deficiency level during medium combustion is less than ■1, stop the combustion.
The configuration includes an oxygen deficiency determination section that returns to weak combustion when the oxygen deficiency level during medium combustion is equal to or higher than V1.
この発明は、上記の構成によって微弱燃焼中に周期的に
弱燃焼にし、この弱燃焼時に燃焼状態が悪くなった場合
のみ中燃焼にして酸欠検出を行うようにしたので、燃焼
部の下限の燃焼量を従来の燃焼よりさらに少ない微弱燃
焼にしても安全性を損なうことなく燃焼させることがで
きる。In this invention, with the above configuration, weak combustion is periodically performed during weak combustion, and only when the combustion condition worsens during this weak combustion, medium combustion is performed and oxygen deficiency detection is performed. It is possible to perform combustion without compromising safety even if the amount of combustion is made weaker than conventional combustion.
以下、この発明の一実施例について図面を参照しながら
説明する。An embodiment of the present invention will be described below with reference to the drawings.
第1図は本発明の一実施例における燃焼検出装置のブロ
ック図である。FIG. 1 is a block diagram of a combustion detection device according to an embodiment of the present invention.
図において、1は温度設定手段(図示せず)と室内温度
検出手段(図示せず)からの信号によって燃焼量を決定
するとともに、燃焼量に応じた酸欠レベルを決定する燃
焼fi制御部、2は燃焼制御部1により決定された燃焼
量に応じた炎を形成する燃焼部、3は燃焼部2の燃焼状
態を検出するための燃焼検出部
、4ば燃焼検出部3から入力される燃焼状態信号vIと
燃焼制御部1から送られる酸欠レベルを比較して酸欠の
判定をするととに、判定の結果により燃焼制御部1に制
御信号を送り、燃焼部2を制御する酸欠判定部、5は微
弱燃焼中に周期的に短時間だけ弱燃焼に燃焼量アップす
るよう燃焼制御部1にインターバル信号を送るインター
バル信号発生部である。In the figure, 1 is a combustion fi control unit that determines the amount of combustion based on signals from a temperature setting means (not shown) and an indoor temperature detection means (not shown), and also determines an oxygen deficiency level according to the amount of combustion; 2 is a combustion section that forms a flame according to the combustion amount determined by the combustion control section 1; 3 is a combustion detection section for detecting the combustion state of the combustion section 2; and 4 is a combustion input from the combustion detection section 3. Oxygen deficiency is determined by comparing the status signal vI with the oxygen deficiency level sent from the combustion control unit 1, and a control signal is sent to the combustion control unit 1 based on the determination result to control the combustion unit 2. Sections 5 and 5 are interval signal generating sections that send interval signals to the combustion control section 1 so as to periodically increase the combustion amount to weak combustion for a short period of time during weak combustion.
第2図は第1図のブロック図を具体的に回路図で示した
ものである。前記ブロック図で説明した燃焼部2は、バ
ーナ6、バーナ6に燃料を供給する電磁ポンプ7、バー
ナ6に燃焼用空気と温風用空気を送る送風機8などによ
って構成されている。FIG. 2 specifically shows the block diagram of FIG. 1 in a circuit diagram. The combustion section 2 explained in the block diagram includes a burner 6, an electromagnetic pump 7 that supplies fuel to the burner 6, a blower 8 that supplies combustion air and hot air to the burner 6, and the like.
また、燃焼検出部3は、フレームロッド9.フレームロ
ッド9とバーナ6の間に電圧を印加するための直流電源
10(交流電源でも可)、フレームロッド9とバーナ6
の間に流れる炎のイオン電流を検出し、電圧vfに変換
するための抵抗11゜12などによって構成されている
。The combustion detection section 3 also includes a frame rod 9. A DC power supply 10 for applying voltage between the frame rod 9 and the burner 6 (an AC power supply is also acceptable), the frame rod 9 and the burner 6
It is composed of resistors 11 and 12 for detecting the ion current of the flame flowing between them and converting it into a voltage vf.
13ばマイクロコンピュータ(以下マイコンという)で
、これは前記ブロック図で説明した燃焼制御部1.酸欠
判定部4.インターバル信号発生部5等が制御プログラ
ムとして予め記憶されているメモリ13aS前記制御プ
ログラムによって制御、演算等各種の処理を行うCPU
13b、炎のイオン電流を電圧に変換した値Vfが入力
され、このアナログ量をデジタル量に変換してCPU1
3bに送る入力回路13c、、CPU13bの処理結果
に基づいて電磁ポンプフ、送風機82表示N14等に信
号を送り制御する出力回路13dなどから構成されてい
る。13 is a microcomputer (hereinafter referred to as microcomputer), which is the combustion control section 1 explained in the block diagram above. Oxygen deficiency determination section 4. A memory 13aS in which the interval signal generator 5 and the like are stored in advance as a control program; a CPU that performs various processes such as control and calculation according to the control program;
13b, the value Vf obtained by converting the ionic current of the flame into voltage is input, and this analog quantity is converted to a digital quantity and the CPU 1
3b, and an output circuit 13d that sends and controls signals to the electromagnetic pump, blower 82 display N14, etc. based on the processing results of the CPU 13b.
表示’J!114の巾には、インターバル信号によって
燃焼量が増加していることを報知する酸欠検知中ランプ
15が配置さ戟ている。Display 'J! An oxygen deficiency detection lamp 15 is arranged on the width of 114 to notify that the combustion amount is increasing by means of an interval signal.
以上のような構成において、以下、第3図のフローチャ
ートを用いてその動作を説明する。The operation of the above configuration will be explained below using the flowchart shown in FIG.
燃焼部2が燃焼を開始し炎電流が安定してくると、まず
、ステップISでマイコン13が微弱燃焼かどうかを確
認する。微弱燃焼のときはステップ16でインターバル
信号が出ているかをチエツクする。インターバル信号は
、マイコン13のクロック(図示せず)を基準時間とし
てこの基準時間を分周したタイマーがカウントによって
オーバーフローし、クリアしたときに、メモリ13a内
にフラグをセラLすることにより発生する。When the combustion section 2 starts combustion and the flame current becomes stable, first, in step IS, the microcomputer 13 checks whether or not there is weak combustion. If there is weak combustion, it is checked in step 16 whether an interval signal is being output. The interval signal is generated by setting a flag in the memory 13a when a timer that divides the reference time using the clock (not shown) of the microcomputer 13 as a reference time overflows due to counting and is cleared.
インターバル信号が出ている場合は、ステップ17に進
み、マイコン13が電磁ポンプ7と送風機8に信号を送
り、燃焼量を少し上げて弱燃焼にする。インターバル信
号が出ていない場合(よ、ステップ22へ進み微弱燃焼
を継続する。If the interval signal is being output, the process proceeds to step 17, where the microcomputer 13 sends a signal to the electromagnetic pump 7 and the blower 8 to slightly increase the combustion amount for weak combustion. If the interval signal is not output, proceed to step 22 and continue weak combustion.
ステップ17で弱燃焼になると、ステップ18で燃焼検
出部3からの信号Vmと、予めメモリ13a内にセット
されている弱燃焼時の酸欠レベルv1とを比較し、Lの
方が高ければ、元の微弱燃焼に戻しくステップ21)、
通常燃焼ルーチンに進む(ステップ22)。Vmの方が
低い場合はステップ19へ進み、燃焼量をさらに上げて
中燃焼にし、ステップ20で燃焼検出部3からの信号V
#と予めメモリ1311内にセットされている中燃焼時
の酸欠レベルVmとを比較する。■4の方が高い場合は
元の微弱燃焼に戻しくステップ21)、vtの方が低い
場合はステップ25に進み酸欠と判定して燃焼を停止さ
せる。When weak combustion occurs in step 17, the signal Vm from the combustion detection section 3 is compared with the oxygen deficiency level v1 at the time of weak combustion, which is set in advance in the memory 13a, in step 18, and if L is higher, Step 21) to return to the original weak combustion;
Proceed to the normal combustion routine (step 22). If Vm is lower, the process proceeds to step 19, where the combustion amount is further increased to medium combustion, and in step 20, the signal V from the combustion detection section 3 is
# is compared with the oxygen deficiency level Vm at the time of medium combustion, which is set in advance in the memory 1311. (2) If 4 is higher, return to the original weak combustion (step 21); if vt is lower, proceed to step 25, determine that there is an oxygen deficiency, and stop combustion.
ステップ15で微弱燃焼でない場合はステップ23へ進
み、弱燃焼かどうか判定する。弱燃焼でない場合はステ
ップ24へ進み、燃焼検出部3からの信号vfとメモリ
13a内にセットされている各々の燃焼量に応じて決め
られている酸欠レベルとを比較し、vlの方が高い場合
は通常燃焼ルーチンへ進み、vfの方が低い場合は酸欠
と判定して燃焼を停止させる。If it is determined in step 15 that there is no weak combustion, the process proceeds to step 23, where it is determined whether or not there is weak combustion. If it is not weak combustion, the process proceeds to step 24, where the signal vf from the combustion detection section 3 is compared with the oxygen deficiency level determined according to each combustion amount set in the memory 13a, and it is determined that vl is higher. If vf is higher, the process proceeds to the normal combustion routine, and if vf is lower, it is determined that there is an oxygen deficiency and combustion is stopped.
また、ステップ23において、弱燃焼のときは、ステッ
プ18へ進み燃焼検出部3からの信号vfと弱燃焼時の
酸欠レベルVmとを比較し、vtの方が高い場合は通常
燃焼ルーチンへ進み、vfの方が低い場合はステップ1
9で中燃焼にし、ステップ20で■1と中燃焼時の酸欠
レベルとを比較する。Veの方が高い場合は、ステップ
21で元の弱燃焼に戻して通常燃焼ルーチンに入り、v
lの方が低い場合はステップ25へ進み、燃焼を停止す
る。In step 23, if weak combustion is occurring, the process proceeds to step 18, where the signal vf from the combustion detection section 3 is compared with the oxygen deficiency level Vm during weak combustion, and if vt is higher, the process proceeds to the normal combustion routine. , if vf is lower, step 1
Step 9 sets medium combustion, and step 20 compares 1 with the oxygen deficiency level at medium combustion. If Ve is higher, return to the original weak combustion in step 21 and enter the normal combustion routine, and
If l is lower, the process proceeds to step 25 and combustion is stopped.
以上のように、酸欠での燃焼停止は、中燃焼以上の場合
は、Vfがその燃焼量に応じた酸欠レベル以下のとき、
弱燃焼以下の場合は燃焼量を中燃焼まで上げて、Vfが
中燃焼時の酸欠レベルVm以下のときで、燃焼検出部3
からの出力が充分得られ、酸欠判定の誤差が少ない中燃
焼以上で行うようにしている。As mentioned above, combustion stops due to oxygen deficiency, when Vf is below the oxygen deficiency level corresponding to the combustion amount, in the case of medium or higher combustion.
If the combustion is weak or below, increase the combustion amount to medium combustion, and when Vf is below the oxygen deficiency level Vm during medium combustion, the combustion detection unit 3
This is done at medium combustion or above, where sufficient output is obtained and there is less error in determining oxygen deficiency.
第4図は、各燃焼量における燃焼検出部3からの信号V
+と室内酸素濃度の関係を表したものである。FIG. 4 shows the signal V from the combustion detection unit 3 at each combustion amount.
It shows the relationship between + and indoor oxygen concentration.
中燃焼以上の場合は、室内酸素濃度の変化に対するVm
の変化が大きいため、設定した酸欠レベル(例えば中燃
焼の時ばVm)に対して、燃焼部2の製造上のバラツキ
により、Vmの低い値が上下に変化しても、酸欠で停止
するときの室内酸素濃度値のズレは少なくて済む。For medium combustion or higher, Vm for changes in indoor oxygen concentration
Because of the large change in Vm, even if the low value of Vm changes up or down due to manufacturing variations in the combustion section 2 compared to the set oxygen deficiency level (for example, Vm for medium combustion), the engine will stop due to oxygen deficiency. When doing so, the deviation in the indoor oxygen concentration value is small.
一方、弱燃焼、微弱燃焼の場合は、室内酸素濃度の変化
に対するLの変化が少ないため、設定した酸欠レベル(
例えば弱燃焼のときばVf)に対して、Lの値が上下に
変化す石と、酸欠レベルに対応した室内酸素濃度の値が
大きくズして、例えば、室内酸素濃度が低くなり人体に
危険な状態になっても、Vfが酸欠レベルまで低下しな
いという事態が発生しうる。On the other hand, in the case of weak combustion or slight combustion, the change in L with respect to the change in indoor oxygen concentration is small, so the set oxygen deficiency level (
For example, in the case of weak combustion, the value of L changes up and down with respect to Vf), and the value of the indoor oxygen concentration corresponding to the oxygen deficiency level greatly deviates, for example, the indoor oxygen concentration becomes low and it is harmful to the human body. Even in a dangerous situation, a situation may occur in which Vf does not decrease to the oxygen deficiency level.
したがって、上記の危険を防止するため、燃焼量が少な
くなるほど、その燃焼量に対応した酸欠レベルを室内酸
素濃度の比較的高いレベルまで上げて、燃焼部2の製造
上のバラツキによるVf値の変動に対処する必要がある
。Therefore, in order to prevent the above-mentioned danger, as the amount of combustion decreases, the oxygen deficiency level corresponding to the amount of combustion is raised to a relatively high level of indoor oxygen concentration, and the Vf value due to manufacturing variations in the combustion section 2 is increased. We need to deal with fluctuations.
弱燃焼以下の燃焼量の酸欠レベルを酸素濃度の比較的高
いレベルまで上げると、各々の製造上のバラツキやj[
、If零電圧変動等により、vlが容易に酸欠レベルま
で低下する可能性がある。そのため、弱燃焼以下の場合
は、■−が酸欠レベル以下で燃焼を停止するよう設定す
ると、酸素濃度が充分あるのに誤動作で頻繁に燃焼を停
止するという事態になる。When the oxygen deficiency level of the combustion amount below weak combustion is increased to a relatively high oxygen concentration level, manufacturing variations and
, If zero voltage fluctuation, etc., vl may easily drop to the oxygen deficiency level. Therefore, in the case of weak combustion or lower, if the combustion is set to stop when - is below the oxygen deficiency level, combustion will frequently stop due to malfunction even though the oxygen concentration is sufficient.
このような事態を防止するため、弱燃焼以下ではVmが
酸欠が酸欠レベルになっても燃焼を停止させずに、安定
した酸欠検出が行える中燃焼まで燃焼量を上げて再度酸
欠かどうかを確認するようにしている。In order to prevent this situation, under weak combustion, Vm does not stop combustion even if the oxygen deficiency reaches the oxygen deficiency level, but increases the combustion amount to medium combustion where stable oxygen deficiency detection can be performed and restarts oxygen deficiency again. I'm trying to make sure.
また、微弱燃焼では、弱燃焼よりさらに室内酸素濃度に
対するvlの変化が少な(、酸欠レベルを設定すること
が難しいので、j!期的に短時間弱燃焼にして、この弱
燃焼時に酸欠検出を行うようにしている。In addition, in weak combustion, the change in vl with respect to the indoor oxygen concentration is even smaller than in weak combustion. I am trying to perform detection.
微弱燃焼から周期的に短時間弱燃焼しても、騒音値の変
化が少なく、また燃焼量もあがりすぎることがないため
、!、41が上昇したすせず、実用上のRMtは少ない
。Even if you periodically perform weak combustion for a short period of time, there will be little change in the noise level, and the amount of combustion will not increase too much. , 41 increased, but the practical RMt is small.
なお、この周期は酸欠検出間隔であるから安全上重要で
あす1、実際の燃焼量と想定される部屋の大きさによっ
て適宜決定すればよい。Note that this period is an oxygen deficiency detection interval, so it is important for safety1, and may be appropriately determined depending on the actual combustion amount and the assumed size of the room.
微弱燃焼から一変に中燃焼まで上げても酸欠検出はでき
るが、この場合は、騒音値の増大と室温の上昇という問
題点が発生する。Oxygen deficiency can be detected even if the combustion level is changed from weak combustion to medium combustion, but in this case, problems arise such as an increase in noise level and a rise in room temperature.
次に、第5図のフローチャートについて説明する。Next, the flowchart shown in FIG. 5 will be explained.
この図は、第3図のフローチャートにステップ26を追
加したものである。ステップ15で微弱燃焼のときは、
ステップ2Bで燃焼検出部3からの信号Vyと微弱燃焼
時の第1の酸欠レベルL1 とを比較し、Veの方が高
い場合は通常燃焼ルーチンへ進み、Vfの方が低い場合
はステップ16へ進み、以下第3図と同様の動作を行う
。This figure is the flowchart of FIG. 3 with step 26 added. If there is weak combustion in step 15,
In step 2B, the signal Vy from the combustion detector 3 is compared with the first oxygen deficiency level L1 during weak combustion, and if Ve is higher, proceed to the normal combustion routine, and if Vf is lower, step 16 3, and the same operations as in FIG. 3 are performed.
微弱燃焼時に第1の酸欠レベルLHを設定し、右がVm
1以上の場合は、通常燃焼を継続するようにしたので、
Vrが比較的高い場合は、不必要に周期的に弱燃焼にな
ることがなく、騒音の変化や室温の上昇の心配がほとん
どない。The first oxygen deficiency level LH is set during weak combustion, and the one on the right is Vm.
If the value is 1 or more, normal combustion continues, so
When Vr is relatively high, weak combustion does not occur unnecessarily and periodically, and there is almost no concern about changes in noise or rise in room temperature.
微弱燃焼時の第1の酸欠レベルVl、は、第4図に示す
ように弱燃焼時の酸欠レベルVmよりさらに高い室内酸
素濃度レベルの位置に設定する必要がある。The first oxygen deficiency level Vl during weak combustion needs to be set at a position of an indoor oxygen concentration level higher than the oxygen deficiency level Vm during weak combustion, as shown in FIG.
従って、燃焼部2の製造上のバラツキや電源電圧の変動
等により、V(がVs1Ju下になることもありうるが
、その場合でも微弱燃焼から周期的に短詩R弱燃焼にな
るだけなので、実用上*iiiがない。Therefore, due to manufacturing variations in the combustion section 2, fluctuations in the power supply voltage, etc., V( may become lower than Vs1Ju, but even in that case, it will only change from a weak combustion to a short R weak combustion periodically, so it is not practical. Upper *iii is missing.
次に、第6図のフローチャートについて説明する。Next, the flowchart shown in FIG. 6 will be explained.
この図は、第5図のフローチャートにステップ27を追
加したものである。ステップ15で微弱燃焼のときは、
ステップ27で燃焼検出部3からの信号右と微弱燃焼時
の第2の酸欠レベルVmtとを比較し、vfの方が低い
場合はステップ25へ進み、燃焼を停止し、■4の方が
高い場合はステップ26へ進み、以下第5図と同様の動
作を行う。This figure is the flowchart of FIG. 5 with step 27 added. If there is weak combustion in step 15,
In step 27, the signal right from the combustion detector 3 is compared with the second oxygen deficiency level Vmt during weak combustion, and if vf is lower, the process proceeds to step 25 and combustion is stopped. If it is high, the process advances to step 26, and the same operation as in FIG. 5 is performed.
すなわち、?ri弱燃焼時、燃焼検出部3からの信号V
fが、第1の酸欠1/ベルVm1以上のときは通常燃焼
を行い、第1の酸欠レベルVs1と第2の酸欠レベルV
m2の間のときは周期的に短時間だけ弱燃焼に17で酸
欠検出を行い、第2の酸欠レベル■。In other words? During ri weak combustion, the signal V from the combustion detection section 3
When f is equal to or greater than the first oxygen deficiency 1/bell Vm1, normal combustion is performed, and the first oxygen deficiency level Vs1 and the second oxygen deficiency level V
When the temperature is between m2, oxygen deficiency is detected periodically at 17 for weak combustion for a short period of time, and the second oxygen deficiency level ■ is reached.
以下の時は燃焼を停止するよう力作する。Make every effort to stop combustion in the following cases:
微弱燃焼時の第2の酸欠レベルペレVs2をR定し、V
mがVm!以下の場合(よ、燃焼を停止するようにした
ので、例えば微弱燃焼時に何等かの故障により急激に燃
焼状態が悪化し、Vfが低下しVa2以下になった場合
でも、インターバル信号を待つ乙となく燃焼停止となる
ので、−M安全な燃焼検出装置となる。The second oxygen deficiency level Pelle Vs2 during weak combustion is set to R, and V
m is Vm! In the following cases (because combustion is stopped, for example, even if the combustion condition suddenly deteriorates due to some kind of failure during weak combustion and Vf drops to Va2 or less, you can still wait for the interval signal. Since the combustion will stop without any trouble, -M becomes a safe combustion detection device.
微弱燃焼時の第2の酸欠レベルVm2は、第4図に示す
ように、中燃焼時の酸欠レベル〜″、よりさらに低い室
内酸素濃度レベルの位置に設定する必要がある。そうす
ることにより、燃焼部2の製造上のバラツキや電源電圧
の変動等によってVfが低い場合でも、Vm2以下にな
ることはないので、誤動作で燃焼停止することもない。As shown in FIG. 4, the second oxygen deficiency level Vm2 during weak combustion needs to be set at a position that is an even lower indoor oxygen concentration level than the oxygen deficiency level during medium combustion. Therefore, even if Vf is low due to manufacturing variations in the combustion section 2, fluctuations in power supply voltage, etc., it will never fall below Vm2, so combustion will not stop due to malfunction.
以上説明した、第3図、第5図、第6図のフローチャー
トにおいて、ステップ16でインターバル信号が発生し
、ステップ17で弱燃焼にするときに、同時に酸欠検知
中ランプ15を点灯するようにすれば、微弱燃焼から弱
燃焼に燃焼量が変化し、騒音がやや大きてなったときに
も、使用者が不信に思うこともなく、返って換気の必要
性を知らしめるととになり、非常に有効である。前記酸
欠検知中ランプ15ば、ステップ21で燃焼量を元に戻
すときに消灯すればよい。In the flowcharts of FIGS. 3, 5, and 6 described above, when an interval signal is generated in step 16 and weak combustion is performed in step 17, the oxygen deficiency detection lamp 15 is simultaneously turned on. Then, even when the amount of combustion changes from weak combustion to weak combustion and the noise becomes a little louder, the user will not feel suspicious and will be reminded of the need for ventilation. Very effective. The oxygen deficiency detection lamp 15 may be turned off when the combustion amount is restored to its original value in step 21.
なお、上記実施例では、微弱燃焼2弱燃焼、中燃焼の3
段階で説明したが、さらに切換え段階が多いものにあっ
ても同様に、最弱燃焼の場合、インターバル信号によっ
て周期的に短時間だけ燃焼量を上げて酸欠判定を行い、
最終的に燃焼検出部3からの信号が充分大きく、正確な
酸欠判定が行える燃焼量のとき、燃焼を停止させるよう
にすればよい。Note that in the above example, weak combustion, 2 weak combustion, and 3 medium combustion are used.
As explained in the steps above, even if there are many switching steps, in the case of the weakest combustion, the combustion amount is periodically increased for a short period of time using an interval signal to determine oxygen deficiency.
Finally, when the signal from the combustion detection section 3 is sufficiently large and the combustion amount is such that accurate oxygen deficiency determination can be made, combustion may be stopped.
以上のように、この発明によれば、燃焼量が微弱燃焼中
に周期的に短時霜だけ弱燃焼にして酸欠判定を行い、酸
素濃度が低いと判定されたときは、さらに中燃焼にして
酸欠判定を行うようにしたので、燃焼部の下限の燃焼量
を従来よりも更に低下させることができ、また、燃焼量
が少ない場合でも、不必要に強燃焼にしたりすることな
く、正確な酸欠判定が可能な安全性の高い燃焼検出装置
が得られる。As described above, according to the present invention, oxygen deficiency is determined by periodically performing weak combustion for short periods of time during combustion with a low combustion amount, and when it is determined that the oxygen concentration is low, medium combustion is further performed. Since the oxygen deficiency judgment is performed based on oxygen deficiency, it is possible to further reduce the combustion amount at the lower limit of the combustion section than before, and even when the combustion amount is small, it is possible to accurately detect oxygen deficiency without making it unnecessarily strong. A highly safe combustion detection device capable of determining oxygen deficiency can be obtained.
第1図はこの発明の一実施例における燃焼検出装置のブ
ロック図、第2図は同装置の回路図、第3図、第5図、
第6図は動作状態のフローチャート、第4図は燃焼検出
部からの信号の酸欠特性を示すグラフである。
図において、1は燃焼制御部、2は燃焼部、3は燃焼検
出部、4は酸欠判定部、5はインターバル信号発生部、
13はマイクロコンピュータ、15は酸欠検知中ランプ
である。
なお、図中同一符号は同一または相当部分を示す。
代理人 大 岩 増 雄(外2名)
第1図
第2図
第4図
第3図
第5図Fig. 1 is a block diagram of a combustion detection device according to an embodiment of the present invention, Fig. 2 is a circuit diagram of the same device, Figs.
FIG. 6 is a flowchart of the operating state, and FIG. 4 is a graph showing the oxygen deficiency characteristics of the signal from the combustion detection section. In the figure, 1 is a combustion control section, 2 is a combustion section, 3 is a combustion detection section, 4 is an oxygen deficiency determination section, 5 is an interval signal generation section,
13 is a microcomputer, and 15 is an oxygen deficiency detection lamp. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa (2 others) Figure 1 Figure 2 Figure 4 Figure 3 Figure 5
Claims (4)
る燃焼制御部と、前記燃焼部に形成された炎の燃焼状態
を検出する燃焼検出部と、前記燃焼部の燃焼量が微弱燃
焼中に周期的に短時間だけ弱燃焼とするよう燃焼制御部
にインターバル信号を送るインターバル信号発生部と、
前記インターバル信号によって弱燃焼時に前記燃焼検出
部からの信号V_fが弱燃焼時の酸欠レベルV_lより
低い場合のみ短時間だけ強制的に中燃焼として再度中燃
焼時の酸欠レベルV_mと比較し、中燃焼時の酸欠レベ
ルV_1以下の場合には燃焼を停止させるとともに、中
燃焼時の酸欠レベルV_m以上の場合には微弱燃焼に戻
す酸欠判定部とを備えてなる燃焼検出装置。(1) A combustion section, a combustion control section that controls the combustion amount of the combustion section in multiple stages, a combustion detection section that detects the combustion state of the flame formed in the combustion section, and a combustion detection section that detects the combustion amount of the combustion section. an interval signal generating section that sends an interval signal to the combustion control section to periodically cause the weak combustion for a short period of time during the weak combustion;
According to the interval signal, only when the signal V_f from the combustion detection unit is lower than the oxygen deficiency level V_l during weak combustion during weak combustion, forcibly sets medium combustion for a short time and compares it again with the oxygen deficiency level V_m during medium combustion; A combustion detection device comprising an oxygen deficiency determination unit that stops combustion when the oxygen deficiency level during medium combustion is V_1 or lower, and returns to weak combustion when the oxygen deficiency level during intermediate combustion is equal to or higher than V_m.
る燃焼制御部と、前記燃焼制御部に形成された炎の燃焼
状態を検出する燃焼検出部と、前記燃焼部の燃焼量が微
弱燃焼中に前記燃焼検出部からの信号V_fが微弱燃焼
時の第1の酸欠レベルV_m_1より低い場合のみ周期
的に短時間だけ弱燃焼とするよう燃焼制御部にインター
バル信号を送るインターバル信号発生部と、前記インタ
ーバル信号によって弱燃焼時に前記燃焼検出部からの信
号V_fが弱燃焼時の酸欠レベルV_lより低い場合の
み短時間だけ強制的に中燃焼と再度中燃焼時の酸欠レベ
ルV_mとして比較し、中燃焼時の酸欠レベルV_m以
下の場合のは燃焼を停止させるとともに、中燃焼時の酸
欠レベルV_m以上の場合には微弱燃焼に戻す酸欠判定
部とを備えてなる燃焼検出装置。(2) a combustion section, a combustion control section that controls the combustion amount of the combustion section in multiple stages, a combustion detection section that detects the combustion state of the flame formed in the combustion control section, and a combustion amount of the combustion section. is an interval signal that sends an interval signal to the combustion control unit to periodically perform weak combustion for a short time only when the signal V_f from the combustion detection unit is lower than the first oxygen deficiency level V_m_1 during weak combustion during weak combustion. The generation part and the interval signal forcefully control the oxygen deficiency level V_m during medium combustion for a short time only when the signal V_f from the combustion detection part is lower than the oxygen deficiency level V_l during weak combustion during weak combustion. A combustion system comprising an oxygen deficiency determination unit that stops combustion when the oxygen deficiency level during medium combustion is V_m or lower, and returns to weak combustion when the oxygen deficiency level during intermediate combustion is equal to or higher than V_m. Detection device.
する燃焼制御部と、前記燃焼制御部に形成された炎の燃
焼状態を検出する燃焼検出部と、前記燃焼部の燃焼量が
微弱燃焼中に前記燃焼検出部からの信号V_fが微弱燃
焼時の第1の酸欠レベルV__m_1より低い第2の酸
欠レベルV_m_2との間にある場合のみ周期的に短時
間だけ弱燃焼とするよう燃焼制御部にインターバル信号
を送るインターバル信号発生部と、前記インターバル信
号によって弱燃焼時に前記燃焼検出部からの信号V_f
が弱燃焼時の酸欠レベルV_lより低い場合のみ短時間
だけ強制的に中燃焼として再度中燃焼時の酸欠レベルV
_mと比較し、中燃焼時の酸欠レベルV_m以下の場合
には燃焼を停止させ、中燃焼時の酸欠レベルV_m以上
の場合には微弱燃焼に戻すようにするとともに、微弱燃
焼中の燃焼検出部から信号V_fが微弱燃焼時の第2の
酸欠レベルV_m_2以下の場合には、燃焼を停止する
ようにした酸欠判定部とを備えてなる燃焼検出装置。(3) a combustion section, a combustion control section that controls the combustion amount of the combustion section in multiple stages, a combustion detection section that detects the combustion state of the flame formed in the combustion control section, and a combustion section that controls the combustion amount of the combustion section; Only when the signal V_f from the combustion detection section during weak combustion is between the second oxygen deficiency level V_m_2 which is lower than the first oxygen deficiency level V__m_1 during weak combustion, weak combustion is periodically performed for a short period of time. an interval signal generating section that sends an interval signal to the combustion control section so as to generate a signal V_f from the combustion detection section during weak combustion according to the interval signal;
Only when is lower than the oxygen deficiency level V_l during weak combustion, the oxygen deficiency level V during medium combustion is forced again as medium combustion for a short time.
Compared to _m, if the oxygen deficiency level during medium combustion is below V_m, combustion is stopped, and when the oxygen deficiency level during medium combustion is above V_m, the combustion is returned to weak combustion, and the combustion during weak combustion is A combustion detection device comprising: an oxygen deficiency determination unit configured to stop combustion when a signal V_f from the detection unit is equal to or less than a second oxygen deficiency level V_m_2 during weak combustion.
いることを報知する表示手段を備えてなる請求項(1)
〜(3)記載の燃焼検出装置。(4) Claim (1) further comprising display means for notifying that the amount of combustion is increasing based on the interval signal.
~ (3) The combustion detection device described.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2204722A JPH086920B2 (en) | 1990-08-01 | 1990-08-01 | Combustion detector |
KR1019910010437A KR920004779A (en) | 1990-08-01 | 1991-06-24 | Combustion detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2204722A JPH086920B2 (en) | 1990-08-01 | 1990-08-01 | Combustion detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0490417A true JPH0490417A (en) | 1992-03-24 |
JPH086920B2 JPH086920B2 (en) | 1996-01-29 |
Family
ID=16495229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2204722A Expired - Lifetime JPH086920B2 (en) | 1990-08-01 | 1990-08-01 | Combustion detector |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPH086920B2 (en) |
KR (1) | KR920004779A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0571654U (en) * | 1992-02-05 | 1993-09-28 | 株式会社日立ホームテック | Hot air heater |
JPH066945U (en) * | 1992-06-10 | 1994-01-28 | 株式会社日立ホームテック | Hot air heater |
JP2009156522A (en) * | 2007-12-27 | 2009-07-16 | Osaka Gas Co Ltd | Combustion device |
-
1990
- 1990-08-01 JP JP2204722A patent/JPH086920B2/en not_active Expired - Lifetime
-
1991
- 1991-06-24 KR KR1019910010437A patent/KR920004779A/en not_active Application Discontinuation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0571654U (en) * | 1992-02-05 | 1993-09-28 | 株式会社日立ホームテック | Hot air heater |
JPH066945U (en) * | 1992-06-10 | 1994-01-28 | 株式会社日立ホームテック | Hot air heater |
JP2009156522A (en) * | 2007-12-27 | 2009-07-16 | Osaka Gas Co Ltd | Combustion device |
Also Published As
Publication number | Publication date |
---|---|
KR920004779A (en) | 1992-03-28 |
JPH086920B2 (en) | 1996-01-29 |
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