JPH0229933B2 - - Google Patents
Info
- Publication number
- JPH0229933B2 JPH0229933B2 JP59021012A JP2101284A JPH0229933B2 JP H0229933 B2 JPH0229933 B2 JP H0229933B2 JP 59021012 A JP59021012 A JP 59021012A JP 2101284 A JP2101284 A JP 2101284A JP H0229933 B2 JPH0229933 B2 JP H0229933B2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- gas
- calculation
- calculation means
- judgment value
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 7
- 235000014676 Phragmites communis Nutrition 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000007423 decrease Effects 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
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
- F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/04—Memory
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/18—Detecting fluid leaks
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はガス機器の燃焼または非燃焼をガス流
量により検出する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for detecting combustion or non-combustion in gas appliances based on gas flow rate.
従来例の構成とその問題点
従来のガス流量測定装置としては例えば第１図
に示す装置がある。ガス通路１にガスメータ２を
設ける。このガスメータのひじ金部に永久磁石を
設け、ひじ金の作動に応じて永久磁石が作動し、
この永久磁石の作動に応じてオンオフするリード
スイツチ３を設ける。ガスメータ２と永久磁石と
リードスイツチ３とで流量センサを構成し、リー
ドスイツチ３のオンオフが流量信号として出力さ
れる。ひじ金一往復当りにガスメータ２を通過す
るガス量は一定である。従つて演算手段４によ
り、リードスイツチ３の単位時間当りのオンオフ
回数を演算することにより間欠的に流量を測定で
きる。このような装置にあつては、例えばガス機
器の一例としてのガステーブルコンロ５がガスを
消費したとき、その流量を知ることが可能である
が、コンロ５が燃焼状態にあるのか、或いは生ガ
スのまま放出されているのかは不明である。すな
わち単にガステーブルコンロ５よりガスが放出さ
れていることを知ることができるだけである。Configuration of conventional example and its problems As a conventional gas flow rate measuring device, for example, there is a device shown in FIG. A gas meter 2 is provided in a gas passage 1. A permanent magnet is installed in the armrest of this gas meter, and the permanent magnet operates according to the operation of the armrest.
A reed switch 3 is provided which turns on and off according to the operation of this permanent magnet. The gas meter 2, the permanent magnet, and the reed switch 3 constitute a flow rate sensor, and the on/off state of the reed switch 3 is output as a flow rate signal. The amount of gas passing through the gas meter 2 per reciprocation of the armrest is constant. Therefore, the flow rate can be measured intermittently by calculating the number of on/off times of the reed switch 3 per unit time using the calculation means 4. In the case of such a device, for example, when the gas table stove 5, which is an example of gas equipment, consumes gas, it is possible to know the flow rate, but it is possible to know whether the stove 5 is in a combustion state or whether raw gas is being consumed. It is unclear whether it is still being released. In other words, it is only possible to know that gas is being released from the gas table stove 5.
発明の目的
本発明は上記従来の欠点を解消するもので、同
様の流量センサを用いてガス機器が燃焼状態にあ
るのか或いは生ガスのまま放出されているのかを
認識できる非燃焼状態検出装置を得ることを目的
とする。Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and provides a non-combustion state detection device that uses a similar flow rate sensor to recognize whether a gas appliance is in a combustion state or is emitting raw gas. The purpose is to obtain.
発明の構成
上記目的を達成するため、本発明のガス機器の
燃焼状態検出装置は、ガス機器を燃焼させたとき
と生ガスのまま放出させたときの流量の時間変化
パターンが異なることに着目し、流量センサから
の流量信号より第１の演算手段で間欠的に流量を
演算し、その結果を記憶する記憶手段を設け、こ
の記憶手段が記憶しているところのガスが流れ始
めてからの初回の流量と予め定めた回数すなわち
ｎ回目の流量との差または比率を第２の演算手段
にて演算し、この結果が判定値発生手段よりの判
定値よりも小なるとき非燃焼信号を出力する比較
器を設ける構成であり、燃焼によつてガスが流れ
ているのかまたは故意または過失により生ガスの
まま放出されているのかを知ることができるの
で、例えばガス安全装置等の応用が可能であると
いう効果を有するものである。ガス機器を燃焼さ
せると、バーナ付近の温度上昇等によりガス流量
は徐々に低下する。この変化率はガス機器によつ
て異なるが、例えば10分後で−10％程度のものが
ある。他方生ガスのまま放出させれば、このよう
な流量の変化は起らない。従つて上述した構成に
より上記の効果が得られる。Structure of the Invention In order to achieve the above object, the combustion state detection device for gas appliances of the present invention focuses on the fact that the time change pattern of the flow rate is different when the gas appliance is combusted and when raw gas is released as raw gas. , the first calculation means calculates the flow rate intermittently based on the flow rate signal from the flow rate sensor, and a storage means is provided for storing the results, and the first calculation after the gas starts flowing is stored in the storage means. A comparison in which the second calculation means calculates the difference or ratio between the flow rate and the predetermined number of times, that is, the nth flow rate, and outputs a non-combustion signal when the result is smaller than the judgment value from the judgment value generation means. It is said that it can be applied as a gas safety device, for example, because it can tell whether gas is flowing due to combustion or whether raw gas is being released intentionally or accidentally. It is effective. When a gas appliance is burned, the gas flow rate gradually decreases due to factors such as an increase in temperature near the burner. This rate of change varies depending on the gas appliance, but for example, it can be about -10% after 10 minutes. On the other hand, if raw gas is released as is, such a change in flow rate will not occur. Therefore, the above-described effects can be obtained with the above-described configuration.
実施例の説明
以下、本発明の一実施例について、図面に基づ
いて説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
第２図において、リードスイツチ３からの流量
信号に基づき第１の演算手段は間欠的に流量を演
算し、演算が終了すると結果を記憶手段７、ゼロ
検出手段８に出力するとともに、演算終了パルス
をカウンタ９に出力する。記憶手段７は最も古い
データF1（初回の演算流量）と最新のデータFi（最
後の演算流量）を出力していて、この出力の変化
率△Ｆ＝（F1−Fi）／F1を第２の演算手段１０で
演算する。但しこの演算はカウンタ９が予め定め
た演算終了パルス数Ｎを計数したときに出力する
演算スタート信号入力時に実行される。第２の演
算手段の結果すなわち変化率と、判定値発生手段
１１からの判定値△Faとは、比較手段たる比較
器１２で比較される。比較器１２は、変化率△Ｆ
が判定値△Faより小なるとき非燃焼信号を出力
する。ゼロ検出手段８は、第１の演算手段からの
流量がゼロであるとき、記憶手段７、カウンタ
９、比較器１２にリセツトパルスを出力し、この
リセツトパルスによりこれらはリセツトされる。 In FIG. 2, the first calculation means intermittently calculates the flow rate based on the flow rate signal from the reed switch 3, and when the calculation is completed, outputs the result to the storage means 7 and zero detection means 8, and outputs the calculation end pulse. is output to the counter 9. The storage means 7 outputs the oldest data F 1 (first calculated flow rate) and the latest data F i (last calculated flow rate), and the rate of change of this output is ΔF=(F 1 −F i )/F 1 is calculated by the second calculation means 10. However, this calculation is executed when the calculation start signal is inputted when the counter 9 has counted the predetermined number N of calculation end pulses. The result of the second calculation means, that is, the rate of change, and the judgment value ΔFa from the judgment value generation means 11 are compared by a comparator 12 serving as a comparison means. The comparator 12 calculates the rate of change △F
When is smaller than the judgment value △Fa, a non-combustion signal is output. Zero detection means 8 outputs a reset pulse to storage means 7, counter 9, and comparator 12 when the flow rate from the first calculation means is zero, and these are reset by this reset pulse.
以下上記構成における作用について説明する。
ガス機器（例えば第１図のコンロ）が使用されて
いない状態では、流量ゼロであり、第１の演算手
段６で演算する流量もゼロとなる。これによりゼ
ロ検出手段８はリセツトパルスを出力し、記憶手
段７、カウンタ９、比較器１２はリセツトされ
る。ガス機器を使用し始めると、ガスが流れ、こ
れがリードスイツチ３で検出される。リードスイ
ツチ３からの流量信号から第１の演算手段６は流
量を演算し、演算終了と共にその結果及び終了パ
ルスを出力する。終了パルスはカウンタ９により
計数されその内容は‘１’となる。また結果は記
憶手段７に記憶される。以降ガス機器が使用され
続けると、第１の演算手段６は流量を演算し、演
算終了の都度結果は記憶手段７に記憶され、カウ
ンタ９はその内容を＋１していく、このようにし
て第１の演算手段６が所定回数目（Ｎ回目）の演
算を終了すると、記憶手段７には１回目の流量
F1からＮ回目の流量FNまでが記憶される。カウ
ンタ９の内容がＮとなるので、カウンタ９は演算
スタート信号を出力する。この信号を受けて第２
の演算手段１０は変化率△Ｆ＝（F1−FN）／F1を
演算し結果を出力する。この変化率△Ｆと、判定
値発生手段１１からの判定値△Faとを比較器１
２は比較し、△Ｆ＜△Faの場合非燃焼信号を出
力する。 The operation of the above configuration will be explained below.
When the gas appliance (for example, the stove shown in FIG. 1) is not in use, the flow rate is zero, and the flow rate calculated by the first calculation means 6 is also zero. As a result, the zero detection means 8 outputs a reset pulse, and the storage means 7, counter 9, and comparator 12 are reset. When the gas appliance starts to be used, gas flows and is detected by the reed switch 3. The first calculation means 6 calculates the flow rate from the flow rate signal from the reed switch 3, and upon completion of the calculation, outputs the result and an end pulse. The end pulse is counted by the counter 9 and its content becomes '1'. The results are also stored in the storage means 7. From then on, as the gas appliance continues to be used, the first calculation means 6 calculates the flow rate, and each time the calculation is completed, the result is stored in the storage means 7, and the counter 9 increments the content by 1. When the calculation means 6 of No. 1 completes the predetermined number of calculations (N time), the storage means 7 stores the flow rate of the first time.
The flow rates from F 1 to the Nth flow rate F N are stored. Since the content of the counter 9 becomes N, the counter 9 outputs a calculation start signal. After receiving this signal, the second
The calculation means 10 calculates the rate of change ΔF=(F 1 −F N )/F 1 and outputs the result. This rate of change △F and the judgment value △Fa from the judgment value generating means 11 are compared to the comparator 1.
2 compares and outputs a non-combustion signal if △F<△Fa.
このように本実施例によれば、燃焼によりガス
が流れているのか或いは生ガスのまま放出されて
いるのかをガス流量の変化率の大きさで検出する
ものであり、もしも生ガスのまま放出されている
場合これを確実に検出できるという効果を有す
る。 In this way, according to this embodiment, it is possible to detect whether gas is flowing due to combustion or being released as raw gas based on the magnitude of the rate of change in the gas flow rate. This has the effect of being able to reliably detect this if it occurs.
上述した実施例では、所定演算回数後に変化率
を演算したが、カウンタ９をタイマに置換するこ
とにより容易に予め定めた時間経過後に変化率を
演算するように変更できるし、また第２の演算手
段１０の演算内容は変化率であつたが、差や比率
を演算するものにあつても同様の効果を得ること
ができる。 In the above embodiment, the rate of change is calculated after a predetermined number of calculations, but by replacing the counter 9 with a timer, the change can be easily changed to calculate the rate of change after a predetermined time has elapsed, and the second calculation Although the calculation content of the means 10 was the rate of change, the same effect can be obtained even when calculating a difference or ratio.
発明の効果
以上のように本発明によれば、ガス流量を測定
することにより、ガス機器が燃焼していてガスが
流れているのか、生ガスのまま放出されているの
かを容易に知ることができ、例えば安全装置等に
応用できるという効果を得ることができる。Effects of the Invention As described above, according to the present invention, by measuring the gas flow rate, it is possible to easily know whether the gas appliance is burning and gas is flowing, or whether raw gas is being released as raw gas. For example, it is possible to obtain the effect that it can be applied to safety devices and the like.
第１図は従来のガス流量測定装置の概略構成
図、第２図は本発明の一実施例であるガス機器の
非燃焼状態検出装置のブロツク図である。
１……ガス通路、２……ガスメータ、３……リ
ードスイツチ、６……第１の演算手段、７……記
憶手段、１０……第２の演算手段、１２……比較
器。
FIG. 1 is a schematic configuration diagram of a conventional gas flow rate measuring device, and FIG. 2 is a block diagram of a non-combustion state detection device for a gas appliance, which is an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Gas passage, 2... Gas meter, 3... Reed switch, 6... First calculating means, 7... Storage means, 10... Second calculating means, 12... Comparator.
Claims (1)
号を出力する流量センサと、前記流量信号に基づ
き間欠的に流量を演算し結果を出力する第１の演
算手段と、前記第１の演算手段の出力の流量を記
憶する記憶手段と、前記記憶手段が記憶している
ガスが流れ始めてからの初回の流量と予め定めた
回数または予め定め時間経過後の流量との差また
は比率または変化率を演算し結果を出力する第２
の演算手段と、判定値を発生する判定値発生手段
と、前記第２の演算手段の出力が前記判定値より
も小なるとき非燃焼信号を出力する比較手段とを
備えたガス機器の非燃焼状態検出装置。1. A flow rate sensor installed in a gas passage and outputting a flow rate signal according to the gas flow rate, a first calculation means that intermittently calculates the flow rate based on the flow rate signal and outputs the result, and the first calculation means A storage means for storing the output flow rate, and calculating the difference, ratio, or rate of change between the initial flow rate after the gas starts flowing and the flow rate after a predetermined number of times or a predetermined time has elapsed, which is stored in the storage means. and output the result.
A non-combustion device for a gas appliance, comprising: a calculation means, a judgment value generation means for generating a judgment value, and a comparison means for outputting a non-combustion signal when the output of the second calculation means is smaller than the judgment value. Condition detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59021012A JPS60164119A (en) | 1984-02-07 | 1984-02-07 | Non-combustion situation detecting device for gas appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59021012A JPS60164119A (en) | 1984-02-07 | 1984-02-07 | Non-combustion situation detecting device for gas appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60164119A JPS60164119A (en) | 1985-08-27 |
| JPH0229933B2 true JPH0229933B2 (en) | 1990-07-03 |
Family
ID=12043140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59021012A Granted JPS60164119A (en) | 1984-02-07 | 1984-02-07 | Non-combustion situation detecting device for gas appliance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60164119A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5293198B2 (en) * | 2009-01-08 | 2013-09-18 | パナソニック株式会社 | Gas shut-off device |
-
1984
- 1984-02-07 JP JP59021012A patent/JPS60164119A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60164119A (en) | 1985-08-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |