JPS6127659B2 - - Google Patents
Info
- Publication number
- JPS6127659B2 JPS6127659B2 JP56140198A JP14019881A JPS6127659B2 JP S6127659 B2 JPS6127659 B2 JP S6127659B2 JP 56140198 A JP56140198 A JP 56140198A JP 14019881 A JP14019881 A JP 14019881A JP S6127659 B2 JPS6127659 B2 JP S6127659B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- proportional control
- control valve
- solenoid valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/002—Regulating fuel supply 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
- F23N2225/00—Measuring
- F23N2225/02—Measuring filling height in burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/14—Fuel valves electromagnetically operated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/16—Fuel valves variable flow or proportional valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/20—Membrane valves
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】
本発明は、比例制御弁を内蔵したガス燃焼装置
において、比例制御弁が異常状態になつたときの
検出手段に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a means for detecting when a proportional control valve enters an abnormal state in a gas combustion apparatus incorporating a proportional control valve.
従来比例制御弁を利用したガス燃焼装置におい
ては、比例制御弁摺動部の摩擦抵抗の増大、弁と
弁座の固着、あるいはダイヤフラムの破損の可能
性があり、その為にガスの設定燃焼流量が急に変
化したり、燃焼生ガスが外部に漏洩したりすると
いう心配があつた。 Conventionally, in gas combustion equipment that uses a proportional control valve, there is a possibility that the frictional resistance of the proportional control valve sliding part will increase, the valve and valve seat may stick, or the diaphragm may be damaged. There were concerns that the temperature might change suddenly or that raw combustion gas might leak outside.
本発明は比例制御弁の正常な電流と制御圧力の
関係を電子制御装置に記憶させ、これと圧力セン
サで検知した実動時の比例制御弁特性を比較し、
正常な電流−制御圧力特性許容範囲から、はずれ
る場合には元電磁弁を閉じることで異常の早期検
出をはかり上記従来の欠点を解消するものであ
る。 The present invention stores the relationship between the normal current and control pressure of the proportional control valve in an electronic control device, and compares this with the proportional control valve characteristics during actual operation detected by a pressure sensor.
If the current-control pressure characteristic deviates from the allowable range, the main solenoid valve is closed to detect the abnormality at an early stage, thereby solving the above-mentioned drawbacks of the prior art.
以下本発明の一実施例について第１図から第３
図にもとづいて説明する。 The following describes one embodiment of the present invention in Figures 1 to 3.
This will be explained based on the diagram.
第１図は、制御システム概要図であり、ガス供
給系路上流側１から元電磁弁２、比例制御弁３、
圧力センサ４、ガスバーナ５が配置されている。
６は電子制御装置本体であり、この内部に正常作
動記憶部７、比較部８、元電磁弁制御部９が、破
線で示した電気信号系統１０で連結されている。 FIG. 1 is a schematic diagram of the control system, from the upstream side 1 of the gas supply system to the solenoid valve 2, proportional control valve 3,
A pressure sensor 4 and a gas burner 5 are arranged.
Reference numeral 6 denotes an electronic control device main body, in which a normal operation storage section 7, a comparison section 8, and a former solenoid valve control section 9 are connected by an electric signal system 10 shown by a broken line.
また１１は比例制御弁３の駆動部である。 Further, 11 is a drive section for the proportional control valve 3.
第２図は比例制御弁概要図であり、電磁コイル
１２にプランジヤーガイド１３を嵌入させ、この
プランジヤーガイド１３内に弁１４、連結棒１５
ダイヤフラム１６が互に連結された電磁プランジ
ヤ１７が遊挿されている。 FIG. 2 is a schematic diagram of a proportional control valve, in which a plunger guide 13 is fitted into an electromagnetic coil 12, and a valve 14 and a connecting rod 15 are inserted into this plunger guide 13.
An electromagnetic plunger 17 having diaphragms 16 connected to each other is loosely inserted.
そして、１８は弁座、１９はガス入口、２０は
ガス出口を示している。 18 is a valve seat, 19 is a gas inlet, and 20 is a gas outlet.
更に第３図は比例制御弁の電流−制御圧力特性
図である。横軸は比例制御弁に印加される電流、
縦軸は制御圧力を示している。 Furthermore, FIG. 3 is a current-control pressure characteristic diagram of the proportional control valve. The horizontal axis is the current applied to the proportional control valve,
The vertical axis shows the control pressure.
一点鎖線で示したＡの特性曲線は比例制御弁が
正常に作動した場合における標準の電流−制御圧
力特性、実線で示したＢ及びＣの特性曲線は比例
制御弁の全動作電流巾に対して、ガス燃焼装置と
しての性能上のバラツキに更に許容できる圧力変
動を考慮して決めた許容下限の電流−制御圧力特
性、及び許容上限の電流−制御圧力特性である。 The characteristic curve A shown by the dashed line is the standard current-control pressure characteristic when the proportional control valve operates normally, and the characteristic curves B and C shown by the solid line are for the entire operating current width of the proportional control valve. , an allowable lower limit current-control pressure characteristic, and an allowable upper limit current-control pressure characteristic determined in consideration of variations in performance of the gas combustion device and allowable pressure fluctuations.
上記構成において、元電磁弁２を通つて比例制
御弁３のガス入口１９に流入する燃料ガスの圧力
は、電磁コイル１２に印加する電流値を変えるこ
とによりすなわち弁１４と弁座１８の間隙を変え
ることにより所定の圧力に制御される。そして、
この制御された燃料ガスは、ガス出口２０を出
て、圧力に対応した燃焼流量でガスバーナ５で燃
焼するものである。第２図から明らかのように、
比例制御弁の電流−制御圧力特性が常に安定して
いる為には、比例制御弁の可動部分である電磁プ
ランジヤ１７や、連結棒１５と支持摺動部（図示
せず）との摩擦力が一定であること、また、弁１
４と弁座１８が固着をおこさないこと、さらに、
ダイヤフラム１６の破損等がないことが必須条件
である。ところが、比例制御弁を構成している各
部品材質のバラツキ、経年変化、あるいは空気中
に微量に存在するオゾンのダイヤフラム１６への
悪影響等がある為に上記必須条件が満たされなく
なる可能性がある。このようになると、比例制御
弁の電流−制御圧力特性が初期値から大きくづれ
てしまうことになる。 In the above configuration, the pressure of the fuel gas flowing into the gas inlet 19 of the proportional control valve 3 through the solenoid valve 2 can be controlled by changing the current value applied to the solenoid coil 12, that is, by changing the gap between the valve 14 and the valve seat 18. By changing the pressure, it is controlled to a predetermined pressure. and,
This controlled fuel gas exits the gas outlet 20 and is combusted in the gas burner 5 at a combustion flow rate corresponding to the pressure. As is clear from Figure 2,
In order for the current-control pressure characteristics of the proportional control valve to be always stable, the frictional force between the electromagnetic plunger 17, which is the movable part of the proportional control valve, and the connecting rod 15 and the supporting sliding part (not shown) must be be constant and also that valve 1
4 and the valve seat 18 do not stick together, and
It is essential that the diaphragm 16 is not damaged. However, there is a possibility that the above essential conditions will not be met due to variations in the materials of the parts that make up the proportional control valve, deterioration over time, or the negative effect of a small amount of ozone in the air on the diaphragm 16. . If this happens, the current-control pressure characteristics of the proportional control valve will deviate greatly from the initial value.
したがつて、第１図の制御システム概要図に示
すように、ガスバーナ５の燃焼流量の大きさのい
かんにかかわらず、常に比例制御弁３のガス出口
２０圧力すなわち制御圧力を、圧力センサ４で検
出しこの実作動時の圧力を電子制御装置６内の比
較部８に入力し、正常作動記憶部７に記憶してあ
る正常動作範囲、すなわち第３図に示すＢ及びＣ
の特性曲線で囲まれた領域内に入つているかどう
か比較判定し、もし、この領域内に入つていない
ときには異常状態と判定するものである。例えば
第３図に示した電流i1のとき圧力センサ４で検出
した実作動時の圧力が、ＰXなる圧力であつた場
合、同様に電流i2のときＰYなる圧力であつた場
合、異常状態と判定するものである。そして、こ
の場合には即座に、異常状態を示す電気信号が、
元電磁弁制御部９に流れ、元電磁弁２が閉じてし
まうものである。 Therefore, as shown in the control system schematic diagram of FIG. The detected pressure during actual operation is input to the comparison section 8 in the electronic control device 6, and the normal operation range stored in the normal operation storage section 7, that is, B and C shown in FIG.
It compares and determines whether it falls within the area surrounded by the characteristic curve, and if it does not fall within this area, it is determined that it is in an abnormal state. For example, if the pressure detected by the pressure sensor 4 during actual operation is a pressure P X when the current i 1 shown in FIG. This is determined to be an abnormal state. In this case, an electrical signal indicating an abnormal condition is immediately transmitted.
The flow flows to the original solenoid valve control section 9, and the original solenoid valve 2 is closed.
以上の説明から明らかのように、本発明のガス
燃焼制御装置は比例制御弁の制御圧力を常時圧力
センサで検出し、この検出値と、電子制御装置内
の比例制御弁正常作動記憶部の値とを比較し、異
なる場合には、即座に元電磁弁を閉じることにな
り、したがつて、比例制御弁の異常または、ガス
燃焼装置の異常の場合には、燃料ガスが自動的に
遮断されるので、きわめて安全性の高いガス燃焼
装置の提供を可能にするものである。 As is clear from the above explanation, the gas combustion control device of the present invention constantly detects the control pressure of the proportional control valve with a pressure sensor, and uses this detected value and the value in the proportional control valve normal operation memory section in the electronic control device. If they are different, the original solenoid valve will be immediately closed. Therefore, if there is an abnormality in the proportional control valve or in the gas combustion device, the fuel gas will be automatically shut off. This makes it possible to provide an extremely safe gas combustion device.
第１図は本発明のガス燃焼制御装置の一実施例
を示す制御システム概要図、第２図は上記制御シ
ステムを構成している比例制御弁の概念図、第３
図は上記比例制御弁の電流−制御圧力特性図であ
る。
１……ガス供給系路、２……元電磁弁、３……
比例制御弁、４……圧力センサ、５……ガスバー
ナー、６……電子制御装置、７……正常作動記憶
部、８……比較部、９……元電磁弁制御部。
FIG. 1 is a schematic diagram of a control system showing one embodiment of the gas combustion control device of the present invention, FIG. 2 is a conceptual diagram of a proportional control valve that constitutes the above control system, and FIG.
The figure is a current-control pressure characteristic diagram of the proportional control valve. 1...Gas supply line, 2...Original solenoid valve, 3...
Proportional control valve, 4... Pressure sensor, 5... Gas burner, 6... Electronic control device, 7... Normal operation memory section, 8... Comparison section, 9... Original solenoid valve control section.
Claims (1)
り、元電磁弁、比例制御弁、圧力センサを配置す
ると共に、これらを制御する電子制御装置を設
け、この電子制御装置内に前記比例制御弁が正常
に作動した場合の電流と制御圧力の関係を記憶さ
せておく正常作動記憶部と、実作動時に比例制御
弁電流に対応する圧力センサからの圧力信号を、
前記正常作動記憶部の値と比較する比較部と、前
記正常作動記憶部の値と前記実作動時の圧力信号
が異なつた場合、元電磁弁を閉じるよう作動する
元電磁弁制御部を設けたガス燃焼制御装置。 ２ 比例制御弁電流に対応する正常作動記憶部の
圧力値と実作動時の圧力信号が異なつた場合に
は、一定時間経過後、元電磁弁を閉じるよう作動
する元電極弁制御部を設けた特許請求の範囲第１
項記載のガス燃焼制御装置。[Claims] 1. A solenoid valve, a proportional control valve, and a pressure sensor are arranged in the gas supply line to the gas burner from the upstream side, and an electronic control device for controlling these is provided, and an electronic control device for controlling these is provided. a normal operation memory section that stores the relationship between current and control pressure when the proportional control valve operates normally; and a pressure signal from the pressure sensor corresponding to the proportional control valve current during actual operation.
A comparison unit that compares the value with the value in the normal operation storage unit, and an original solenoid valve control unit that operates to close the original solenoid valve when the value in the normal operation storage unit and the pressure signal during actual operation are different. Gas combustion control device. 2. A former electrode valve control unit is provided that operates to close the original solenoid valve after a certain period of time if the pressure value in the normal operation memory unit corresponding to the proportional control valve current differs from the pressure signal during actual operation. Claim 1
Gas combustion control device as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56140198A JPS5843327A (en) | 1981-09-04 | 1981-09-04 | Control device for gas combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56140198A JPS5843327A (en) | 1981-09-04 | 1981-09-04 | Control device for gas combustion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5843327A JPS5843327A (en) | 1983-03-14 |
| JPS6127659B2 true JPS6127659B2 (en) | 1986-06-26 |
Family
ID=15263188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56140198A Granted JPS5843327A (en) | 1981-09-04 | 1981-09-04 | Control device for gas combustion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5843327A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009115400A (en) * | 2007-11-07 | 2009-05-28 | Panasonic Corp | Combustion apparatus, fuel treating apparatus, and fuel cell power generating system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6127415A (en) * | 1984-07-17 | 1986-02-06 | Matsushita Electric Ind Co Ltd | Device to detect abnormality in gas control valve |
-
1981
- 1981-09-04 JP JP56140198A patent/JPS5843327A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009115400A (en) * | 2007-11-07 | 2009-05-28 | Panasonic Corp | Combustion apparatus, fuel treating apparatus, and fuel cell power generating system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5843327A (en) | 1983-03-14 |
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