KR950013530B1 - Gas valve control device - Google Patents

Gas valve control device Download PDF

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Publication number
KR950013530B1
KR950013530B1 KR1019930011482A KR930011482A KR950013530B1 KR 950013530 B1 KR950013530 B1 KR 950013530B1 KR 1019930011482 A KR1019930011482 A KR 1019930011482A KR 930011482 A KR930011482 A KR 930011482A KR 950013530 B1 KR950013530 B1 KR 950013530B1
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KR
South Korea
Prior art keywords
gas
diaphragm
space
valve
valve body
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KR1019930011482A
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Korean (ko)
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KR950001173A (en
Inventor
정환곤
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대우전자주식회사
배순훈
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Priority to KR1019930011482A priority Critical patent/KR950013530B1/en
Publication of KR950001173A publication Critical patent/KR950001173A/en
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Publication of KR950013530B1 publication Critical patent/KR950013530B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0672—One-way valve the valve member being a diaphragm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/005—Regulating fuel supply using electrical or electromechanical means

Abstract

an inlet hole and an inlet space formed in one side of a valve body; an outlet hole and an outlet space formed in the other side of the valve body; a control space formed between both sides of the valve body; first and second solenoid valves for flowing and discharging gas; first and second diaphragm members installed in the bottom portion of the inlet space and the outlet space; a third diaphragm member and a microswitch installed on the upper portion of the control space to operate the second solenoid valve; an orifice hole formed in the valve body to connect the control space and the third diaphragm member; and an auxiliary outlet hole formed on the side wall of the outlet hole to thereby discharge a small quantity of gas before an initial ignition.

Description

가스밸브의 가스공급 제어장치Gas supply control device of gas valve

제 1 도 내지 제 5 도는 본 발명의 일실시예로써,1 to 5 are embodiments of the present invention,

제 1 도는 가스밸브의 작동전의 단면도.1 is a cross-sectional view of the gas valve before operation.

제 2 도는 1차 솔레노이드밸브와 다이아프램부재의 작동상태를 나타낸 단면도.2 is a cross-sectional view showing the operating state of the primary solenoid valve and the diaphragm member.

제 3 도는 다이아프램부재에 의하여 2차 솔레노이드밸브가 작동된 상태를 나타낸 단면도.3 is a cross-sectional view showing a state in which the secondary solenoid valve is operated by a diaphragm member.

제 4 도는 1차 솔레노이드밸브의 차단시 다이아프램부재의 작동상태를 나타낸 단면도.4 is a cross-sectional view showing the operating state of the diaphragm member when the primary solenoid valve is shut off.

제 5 도는 밸브몸체만을 발췌하여 보조배출구에 조절나사를 설치한 상태의 평면도.5 is a plan view of a state in which the adjustment screw is installed in the auxiliary outlet by extracting only the valve body.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 밸브몸체 11 : 유입구10: valve body 11: inlet

12 : 유입공간 13 : 배출구12: inlet space 13: outlet

14 : 배출공간 15 : 제어공간14: discharge space 15: control space

16 : 오리피스구멍 17 : 보조배출구16: orifice hole 17: auxiliary outlet

18 : 조절나사 20, 30 : 1, 2차 솔레노이드밸브18: Adjustment screw 20, 30: 1st, 2nd solenoid valve

40 : 다이아프램부재 41 : 다이아프램40: diaphragm member 41: diaphragm

43 : 탄력부재고정판 43 : 탄력부재43: elastic member fixing plate 43: elastic member

41a : 돌기 50 : 마이크로스위치41a: protrusion 50: micro switch

본 발명은 가스보일러용 가스밸브에 관한 것으로, 특히 가스공급시 초기점화전까지 소량의 가스만을 공급하여 점화의 폭발점화를 방지하는 동시에 에너지를 절약하고자 발명한 가스밸브의 가스공급제어장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas valve for a gas boiler, and more particularly, to a gas supply control apparatus of a gas valve invented to save energy while preventing explosion ignition by supplying only a small amount of gas before initial ignition.

종래의 가스밸브는 밸브의 개폐시 정격출력으로 가스가 공급하도록 되어 있어 초기점화시 폭발점화로 화재 및 폭발점화로 화재 및 폭발 위험이 있으며, 또 점화되기까지의 가스손실이 많아 에너지 손실의 원인이 되었던 것이다.Conventional gas valves are designed to supply gas at the rated output when the valve is opened and closed.Therefore, there is a risk of fire and explosion due to fire and explosion ignition due to explosion ignition during initial ignition. It would have been.

본 발명은 이러한 종래 가스밸브의 문제점을 해결하고자 하는 것으로, 2차 솔레노이드밸브의 배출구측벽에 초기점화전까지 소량의 가스만을 배출하도록 보조배출구를 형성하고, 1차와 2차 솔레노이드밸브사이에 오리피스장치와 마이크로스위치를 설치하여 공급되는 가스압에 의하여 초기점화전까지 2차 솔레노이드밸브를 오프시키도록 공급시간을 지연시키도록 가스공급제어장치를 구성하므로써 버너에서의 폭발점화를 방지하여 화재 및 폭발위험을 배제하고, 또 초기점화시 적정량의 가스만을 공급하므로써 에너지절약에 도움을 주고자 하는 것이다.The present invention is to solve the problems of the conventional gas valve, and to form a secondary outlet to discharge only a small amount of gas before the initial ignition on the outlet side wall of the secondary solenoid valve, and between the orifice device and the primary solenoid valve The gas supply control device is configured to delay the supply time so that the secondary solenoid valve is turned off until the initial ignition by the gas pressure supplied by installing the micro switch, thereby preventing the explosion and ignition in the burner, thereby eliminating the risk of fire and explosion. In addition, it is intended to help energy saving by supplying only a proper amount of gas during initial ignition.

이하 본 발명을 첨부도면에 의하여 상세히 설명한다.Hereinafter, the present invention will be described in detail by the accompanying drawings.

도면 제 1 도 내지 제 5 도는 본 발명의 일실시예로써, 밸브몸체(10)의 양측에 유입구(11)와 유입공간(12) 배출구(13)와 배출공간(14)을 각각 형성하여 가스의 유입 및 배출하도록 1, 2차 솔레노이드밸브(20)(30)를 각각 설치한 가스밸브(1)에 있어서, 상기 유입공간(12)과 배출공간(14) 사이에 제어공간(15)를 형성하여 상호 연통되게 하고, 상기 제어공간(15)의 상부에 다이아프램부재(40)와 마이크로스위치(50)를 설치하여 2차 솔레노이드밸브(30)를 작동시키도록 하고, 상기 제어공간(15)과 다이아프램부재(40)가 연통되게 밸브몸체(10)에 오리피스구멍(16)을 형성하며, 상기 배출구(13)의 측벽(13a)에 초기점화전까지 소량의 가스가 배출하도록 보조배출구(17)를 형성하여 구성된 것이 본 발명의 기본적인 특징이다.1 through 5 are views of one embodiment of the present invention, in which the inlet port 11 and the inlet space 12, the outlet port 13 and the outlet space 14 are formed on both sides of the valve body 10, respectively. In the gas valve 1 provided with the primary and secondary solenoid valves 20 and 30 so as to flow in and out, a control space 15 is formed between the inflow space 12 and the discharge space 14. It is in communication with each other, and the diaphragm member 40 and the micro switch 50 is installed in the upper portion of the control space 15 to operate the secondary solenoid valve 30, the control space 15 and the dia An orifice hole 16 is formed in the valve body 10 so that the fram member 40 communicates with each other, and an auxiliary discharge port 17 is formed in the side wall 13a of the discharge port 13 to discharge a small amount of gas until the initial ignition. It is a basic feature of the present invention.

상기 유입공간(12)과 배출공간(14)의 바닥에는 각각 다이아프램부재(60)(70)를 설치하여 가스압을 조절하도록 하며, 각 다이아프램부재(60a)(60b)는 다이아프램(61) 다이아프램고정판(62) 탄력부재(63)로 구성된다.The diaphragm members 60 and 70 are installed at the bottom of the inflow space 12 and the discharge space 14 to adjust gas pressure, and each diaphragm member 60a and 60b is a diaphragm 61. Diaphragm fixing plate 62 is composed of a resilient member (63).

상기 다이아프램부재(40)는 자바라형의 다이아프램(41)과 탄력부재 고정판(42) 및 탄력부재(43)로 구성된다.The diaphragm member 40 is composed of a bellows type diaphragm 41, an elastic member fixing plate 42, and an elastic member 43.

상기 다이아프램(41)은 하단을 밸브몸체(10)에 고정나사(44)로 고정시켜 밀폐되게 하는 동시에 오리피스구멍(16)과 연통되게 하며, 상부 중앙에는 돌기(41a)를 돌출시켜 가스압의 작용시 상승하여 마이크로스위치(50)를 작동시키도록 한다.The diaphragm 41 secures the lower end to the valve body 10 with a fixing screw 44 to be sealed and communicates with the orifice hole 16. The diaphragm 41 protrudes the protrusion 41a at the upper center to act as a gas pressure. Ascends to operate the micro switch 50.

상기 탄력부재(43)는 탄력부재고정판(42)과 마이크로스위치(50) 사이에 탄력있게 설치하여 가스의 차단시에는 다이아프램(41)을 하강시켜 마이크로스위치(50)가 오프되게 하여 2차 솔레노이드밸브(30)의 전원차단으로 배출구(13)를 차단하도록 하고, 가스의 공급시에는 다이아프램(41)의 상승으로 탄력부재(43)를 압축시켜 마이크로스위치(50)가 온되게하여 2차 솔레노이드밸브(30)에 전원을 인가시켜 배출구(13)를 개방시키도록 한다.The resilient member 43 is installed elastically between the resilient member fixing plate 42 and the microswitch 50, and when the gas is blocked, the diaphragm 41 is lowered to turn off the microswitch 50 so that the secondary solenoid Shut off the outlet 13 by turning off the valve 30, and when supplying the gas, the elastic member 43 is compressed by the rise of the diaphragm 41 so that the micro switch 50 is turned on so that the secondary solenoid is turned on. Power is applied to the valve 30 to open the outlet 13.

상기 마이크로스위치(50)는 밸브몸체(10)에 고정설치되어 2차 솔레노이드밸브(30)에 전원을 공급 또는 차단하도록 한다.The micro switch 50 is fixed to the valve body 10 to supply or cut off power to the secondary solenoid valve 30.

상기 오리피스구멍(16)은 제어공간(15)으로 유입된 가스가 다이아프램(41)으로 안내되게 하여 보조배출구(17)를 통과한 가스가 초기점화 할때까지 다이아프램(41)을 서서히 상승시켜 2차 솔레노이드밸브(30)의 작동을 지연시키도록 한다.The orifice hole 16 causes the gas introduced into the control space 15 to be guided to the diaphragm 41 so as to gradually raise the diaphragm 41 until the gas passing through the auxiliary outlet 17 is initially ignited. Delay the operation of the secondary solenoid valve (30).

상기 보조배출구(17)에는 가스의 배출량을 조절하여 점화시기를 조절나사(18)를 밸브몸체(10)에 나사조립하여 보조배출구(17)로 돌출되게 한다.The auxiliary discharge port 17 is adjusted to discharge the gas to adjust the ignition timing screw 18 is assembled to the valve body 10 to protrude to the auxiliary discharge port 17.

이와같이 구성된 본 발명은 제 1 도는 가스밸브(1)가 작동하지 않은 상태로써 가스가 유입구(11)측에 공급되어 있는 상태이다.According to the present invention configured as described above, the gas is supplied to the inlet port 11 side while the gas valve 1 is not operated.

따라서 가스보일러를 구동시키고자 할때는 전원을 인가시켜서 제 2 도와 같이 1차 솔레노이드밸브(20)가 작동하여 유입구(11)를 개방되게 하며, 가스는 유입구(11) 유입공(12) 제어공간(15) 배출공간(14) 순으로 공급하게 된다.Therefore, when the gas boiler is to be driven, the primary solenoid valve 20 is operated to open the inlet 11 by applying power, and the gas is opened in the inlet 11, the inlet hole 12, and the control space 15. ) Supply the discharge space 14 in order.

그러나 유입구(11)를 통해 유입된 가스는 배출구(13)의 차단으로 오리피스구멍(16)과 보조배출구(17)로 빠져나갈 수 밖에 없으며, 이때 유입구(11)로 유입되는 가스량과 보조배출구(17)로 배출되는 가스량의 차이로 유입공간(12) 제어공간(15) 배출공간(14)에 가스압이 발생하게 된다.However, the gas introduced through the inlet 11 is forced out of the orifice hole 16 and the auxiliary outlet 17 by the blocking of the outlet 13, in which case the amount of gas flowing into the inlet 11 and the auxiliary outlet 17 Gas pressure is generated in the discharge space 14 of the inlet space 12 and the control space 15 due to the difference in the amount of gas discharged into the gas.

상기 각 공간의 가스압의 작용으로 유입공간(12)과 배출공간(14)의 바닥에 설치된 다이아프램부재(60)(70)가 제 3 도와 같이 탄력있게 하방으로 이동하게 되고, 이와 동시에 가스는 오리피스구멍(16)으로 계속 공급하여 다이아프램(41)을 상승시키게 된다.The diaphragm members 60 and 70 installed on the bottom of the inflow space 12 and the discharge space 14 are moved downwardly elastically like the third degree by the action of the gas pressure of each space, and at the same time, the gas is orifice The diaphragm 41 is raised by continuing to feed into the hole 16.

상기 다이아프램(41)의 상승으로 탄력부재(43)는 압축되며, 계속적인 상승으로 돌기(41a)가 마이크로스위치(50)를 온시키면 2차 솔레노이드밸브(30)에 전원에 인가되어 제 3 도와 같이 배출구(13)를 개방시키게 된다.As the diaphragm 41 is raised, the elastic member 43 is compressed, and when the protrusion 41a turns on the micro switch 50 due to the continuous rise, the secondary solenoid valve 30 is applied to a power source so that the third member is compressed. Likewise, the outlet 13 is opened.

이때 다이아프램(41)이 상승하여 2차 솔레노이드밸브(30)를 작동시키는 동안 가스는 보조배출구(17)를 통해 배출되기 때문에 소량의 가스량으로 점화를 하게 된다.At this time, while the diaphragm 41 is raised to operate the secondary solenoid valve 30, the gas is discharged through the auxiliary discharge port 17, thereby igniting with a small amount of gas.

즉, 점화시기와 2차 솔레노이드밸브(30)의 작동시기를 일정한 시간 차이를 두고 3작동되게하여 소량의 가스로 먼저 점화를 하도록 하므로써 폭발점화의 예방으로 화재위험을 방지하고, 초기점화시 가스의 소비량을 절감시킬 수가 있는 것이다.That is, the ignition timing and the operation timing of the secondary solenoid valve 30 are operated three times with a certain time difference, so that the first ignition is performed with a small amount of gas, thereby preventing the fire hazard by preventing explosion ignition, You can reduce the consumption.

따라서, 제 3 도와 같이 2차 솔레노이드밸브(30)를 작동시켜 배출구(13)가 개방되면 이때부터는 정격출력에 의한 정상적인 가스의 공급이 되는 것이다.Accordingly, when the outlet 13 is opened by operating the secondary solenoid valve 30 as shown in the third diagram, the normal gas is supplied from the rated output from this time.

배출구(13)로 가스가 계속적으로 배출되는 동안에는 다이아프램(41)에 가스압이 계속 작용하여 마이크로스위치(50)가 온되어 2차 솔레노이드밸브(30)를 개방하게 된다.While the gas is continuously discharged to the outlet 13, the gas pressure is continuously applied to the diaphragm 41 so that the micro switch 50 is turned on to open the secondary solenoid valve 30.

한편, 보조배출구(17)로 가스의 배출시 초기점화가 이루어진뒤에 2차 솔레노이드밸브(30)를 개방시켜야 되는데, 이때에는 버너에 설치된 노즐에 화염센서가 점화여부를 감지하여 1차 솔레노이드밸브(20)를 개폐시키도록 되어 있는 것으로, 예컨대 버너에서 설정된 시간내에 점화가 이루어지지 않을 경우 그 신호를 콘트롤부를 통해 1차 솔레노이드밸브(20)를 차단시켜 가스의 유입을 방지하도록 한것으로써 이는 이미 공지의 기술이므로 더 이상의 설명은 생략하기로 한다. 그리고, 가스보일러의 가동후 정지시키고자 할 때 또는 버너의 점화가 꺼진 경우 1차 솔레노이드밸브(20)가 작동하여 유입구(11)를 차단하여 주므로써 가스의 공급이 중단되어 가스보일러의 가동이 정지하게 되는 것이다.On the other hand, the secondary solenoid valve 30 must be opened after the initial ignition is made when the gas is discharged to the auxiliary discharge port 17. In this case, the flame sensor is detected on the nozzle installed in the burner to detect the primary solenoid valve (20). ) Is to open and close, for example, if the ignition does not occur within the set time in the burner to block the signal to the primary solenoid valve 20 through the control unit to prevent the inflow of gas, which is already known Therefore, further description will be omitted. When the gas boiler is to be stopped after operation or when the ignition of the burner is turned off, the primary solenoid valve 20 is operated to block the inlet 11 so that the gas supply is stopped and the operation of the gas boiler is stopped. Will be done.

따라서 가스공급의 중단으로 밸브몸체(10)의 유입공간(12) 제어공간(15) 배출공간(14)내의 잔존가스는 배출구(13)를 통해 배출이 되므로 각 공간내의 가스압력이 점차적으로 소멸하게 되고, 가스압의 소멸로 다이아프램부재(40)의 다이아프램(41)내의 가스도 오리피스 구멍(16)을 통해 제어공간(15)내로 배출하게 되고, 이와 동시에 압축되어 있던 탄력부재(43)의 탄력이 작용하여 다이아프램(41)을 하강시켜 주게되므로 다이아프램(41)의 돌기(41a)는 마이크로스위치(50)에서 이탈하게 된다.Therefore, the gas remaining in the inlet space 12, the control space 15, the discharge space 14 of the valve body 10 is discharged through the discharge port 13 as the gas supply is stopped, so that the gas pressure in each space gradually disappears. When the gas pressure disappears, the gas in the diaphragm 41 of the diaphragm member 40 is also discharged into the control space 15 through the orifice hole 16, and at the same time, the elasticity of the elastic member 43 that has been compressed This action causes the diaphragm 41 to descend so that the protrusion 41a of the diaphragm 41 is separated from the micro switch 50.

상기 다이아프램(41)에 의하여 마이크로스위치(50)가 오프되면 2차 솔레노이드밸브(30)에 전원공급이 차단되므로 2차 솔레노이드밸브(30)는 배출구(13)를 차단시키게 되고, 밸브몸체(10)의 각 공간내에 잔존하는 미소한 가스는 보조배출구(17)를 통해 배출이 되는 것이다.When the micro switch 50 is turned off by the diaphragm 41, the power supply to the secondary solenoid valve 30 is cut off, so that the secondary solenoid valve 30 blocks the outlet 13 and the valve body 10. The minute gas remaining in each space of) is discharged through the auxiliary discharge port 17.

그리고, 보조배출구(17)로 배출되는 가스량을 조절나사(18)로 조절하여 초기점화시기를 조절할 수가 있는 것이다.And, by adjusting the amount of gas discharged to the auxiliary discharge port 17 with the adjustment screw 18 it is possible to adjust the initial ignition timing.

이와같이 본 발명은 초기점화시 소량의 가스만을 공급하여 점화시 폭발점화를 방지하는 동시에 에너지를 절약할 수 있어 가스밸브의 품질과 신뢰도를 높힐수가 있는 것이다.As described above, the present invention can prevent explosion explosion during ignition by supplying only a small amount of gas during initial ignition and save energy, thereby improving the quality and reliability of the gas valve.

Claims (3)

밸브몸체(10)의 양측에 유입구(11)와 유입공간(12) 및 배출구(13)와 배출공간(14)을 각각 형성하고 그 사이에 제어공간(15)을 형성하여 가스의 유입 및 배출하도록 1, 2차 솔레노이드밸브(20)(30)를 각각 설치한 가스밸브에 있어서, 유입공간(12)과 배출공간(14)의 저부에 다이아프램부재(60a)(60b)를 각각 구비하고, 상기 제어공간(15)의 상부에 다이아프램부재(40)와 마이크로스위치(50)를 설치하여 2차 솔레노이드밸브(30)를 작동시키도록 하되, 상기 제어공간(15)과 다이아프램부재(40)가 연통되게 밸브몸체(10)에 오리피스구멍(16)을 형성하는 것과, 상기 배출구(13)의 측벽(13a)에 초기 점화전까지 소량의 가스가 배출하도록 보조배출구(17)를 형성하여 구성된 것을 특징으로 하는 가스밸브의 가스공급 제어장치.The inlet 11 and the inlet space 12 and the outlet 13 and the discharge space 14 are formed on both sides of the valve body 10 and the control space 15 is formed therebetween so that the gas is introduced and discharged. In the gas valve provided with the primary and secondary solenoid valves 20 and 30, the diaphragm members 60a and 60b are provided in the bottom of the inflow space 12 and the discharge space 14, respectively, The diaphragm member 40 and the micro switch 50 are installed in the upper portion of the control space 15 to operate the secondary solenoid valve 30, but the control space 15 and the diaphragm member 40 are The orifice hole 16 is formed in the valve body 10 in communication with each other, and the auxiliary outlet port 17 is formed in the side wall 13a of the outlet port 13 so as to discharge a small amount of gas until the initial ignition. Gas supply control device of the gas valve. 제 1 항에 있어서, 상기 다이아프램부재(40)는 밸브몸체(10)에 밀폐되게 고정 설치되는 동시에 오리피스 구멍(16)과 연통되게 설치되어 마이크로스위치(50)를 작동시키는 자바라형의 다이아프램(41)과, 다이아프램(41)의 상부에 탄력부재를 지지하도록 설치되는 탄력부재고정판(42)과, 탄력부재고정판(42)과 마이크로스위치(50) 사이에 설치되어 다이아프램(41)을 탄력있게 지지하는 탄력부재(43)로 구성된 것을 특징으로 하는 가스밸브의 가스공급 제어장치.The diaphragm of claim 1, wherein the diaphragm member 40 is fixedly installed in the valve body 10 and installed in communication with the orifice hole 16 to operate the microswitch 50. 41, an elastic member fixing plate 42 which is installed to support the elastic member on the upper part of the diaphragm 41, and is installed between the elastic member fixing plate 42 and the microswitch 50 to make the diaphragm 41 elastic. Gas supply control device for a gas valve, characterized in that consisting of a resilient member 43 to be supported. 제 2 항에 있어서, 상기 다이아프램(41)은 상부중앙에 돌기(41a)를 돌출형성하여 마이크로스위치(50)를 작동시키도록 한 것을 특징으로 하는 가스밸브의 가스공급제어장치.3. The gas supply control apparatus for a gas valve according to claim 2, wherein the diaphragm (41) protrudes a protrusion (41a) at an upper center to operate the micro switch (50).
KR1019930011482A 1993-06-23 1993-06-23 Gas valve control device KR950013530B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930011482A KR950013530B1 (en) 1993-06-23 1993-06-23 Gas valve control device

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Application Number Priority Date Filing Date Title
KR1019930011482A KR950013530B1 (en) 1993-06-23 1993-06-23 Gas valve control device

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KR950001173A KR950001173A (en) 1995-01-03
KR950013530B1 true KR950013530B1 (en) 1995-11-08

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