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KR0175667B1 - Detection method of incomplete combustion - Google Patents

Detection method of incomplete combustion Download PDF

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KR0175667B1
KR0175667B1 KR1019910004652A KR910004652A KR0175667B1 KR 0175667 B1 KR0175667 B1 KR 0175667B1 KR 1019910004652 A KR1019910004652 A KR 1019910004652A KR 910004652 A KR910004652 A KR 910004652A KR 0175667 B1 KR0175667 B1 KR 0175667B1
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combustion
incomplete combustion
gas
semiconductor sensor
sintered body
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미쓰오 나니와
신조우 가토
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노구찌 이찌로우
고아쓰가스 호안교까이
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/14—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermo-sensitive resistors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Emergency Alarm Devices (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

본 발명은, 가스의 불완전 연소에 의하여 발생하는 CO중도의 위험을 회피하기 위하여 연소배기가스중의 CO와 H2를 공지의 가연성 가스용 반도체 센서로 감시하고, 연소중에 불완전 연소가 발생하는 것을 검출하는 불완전 연소의 검출 방법에 관한것이다.The present invention is to monitor the CO and H 2 in the combustion exhaust gas with a known flammable gas semiconductor sensor in order to avoid the risk of CO weight caused by incomplete combustion of the gas, and to detect the occurrence of incomplete combustion during combustion A method for detecting incomplete combustion.

Description

불완전 연소의 검출방법Detecting Incomplete Combustion

제1도는 본 발명의 불완전 연소의 검출방법의 한 실시예를 보여주는 설명도.1 is an explanatory diagram showing one embodiment of a method for detecting incomplete combustion of the present invention.

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

1 : 반도체 센서 2 : 반도체 연소체1: semiconductor sensor 2: semiconductor combustion body

3,4 : 코일 11 : 제어장치3,4 coil 11 controller

12 : 경보부저 13 : 차단밸브12: alarm buzzer 13: shut off valve

14 : LP가스의 가스통로14: Gas passage of LP gas

본 발명은, 가스의 불완전 연소에 의하여 발생되는 CO 중독의 위험을 회피하기 위하여, 연소배기가스중의 CO와 H2를 공지의 가연성 가스용 반도체 센서로 감시하고, 연소중에 불완전 연소가 발생하는 것을 검출하는 불완전 연소의 검출 방법에 관한것이다.In order to avoid the risk of CO poisoning caused by incomplete combustion of gas, the present invention monitors CO and H 2 in combustion exhaust gas with a known flammable gas semiconductor sensor and detects that incomplete combustion occurs during combustion. The present invention relates to a method for detecting incomplete combustion.

LP 가스의 연소중의 불완전 연소를 검출하기 위하여, 금속산화물(SnO2)로 이루어지는 n 형 반도체의 소결체의 내부에, 백금속의 합금선으로 이루어지는 한쌍의 코일을 마주 향한 형상으로 내장한 반도체 센서는 종래부터 공지이다. 이 반도체 센서는, 소결체 입자의 표면에 공기중의 산소를

Figure kpo00002
이온으로하여 흡착하고, 내부의 전자를 표면의
Figure kpo00003
이온에 반발시켜서 소결체의 중앙부에 밀어줌으로서 전자의 통로를 좁히고, 소결체의 표면에 연소배기가스중의 H2등의 가연성 가스가 흡착하면 표면의 산소와 반응하여 산소를 탈취하고, 이에 따라 표면의 산소농도의 감소로 전자의 통로는 넓혀져서 전류가 흐르기 쉽게 된다는 현상을 이용하여 H2등의 가연성 가스를 검출하는 것이다.In order to detect incomplete combustion during the combustion of the LP gas, a semiconductor sensor in which a pair of coils made of an alloy wire of white metal are faced inside a sintered body of an n-type semiconductor made of metal oxide (SnO 2 ) is conventionally used. Is known from. This semiconductor sensor uses oxygen in the air on the surface of the sintered compact particles.
Figure kpo00002
Adsorbed by ions, the electrons inside the surface
Figure kpo00003
By repelling the ions and pushing them to the center of the sintered body, the passage of electrons is narrowed. When flammable gas such as H 2 in the combustion exhaust gas is adsorbed on the surface of the sintered body, it reacts with oxygen on the surface and deodorizes oxygen. By reducing the concentration, a flammable gas such as H 2 is detected by using a phenomenon that the passage of electrons is widened so that current easily flows.

그리하여, 이 반도체 센서에 의하여 CO를 검출하는 경우에는, 히타겸용의 한쪽의 코일에 1분간, 고전압을 가하면 다음의 1.5분간은 저전압을 가하는 것을 반복하고, 고전압을 가했을 때에는, 다시 주울 열에 의하여 소결체를 약 350℃의 고온으로 가열하고, 저전아을 가했을 때에는 소결체의 온도를 약100℃로 낮추고 H2의 감도가 작고, 응답이 극히 늦은 저온시에 측정을 행하여 CO의 농도만큼을 선택적으로 측정하고, 고온시에 소결체의 표면에 흡착한 가스를 방출시키는 것이다.Therefore, when CO is detected by this semiconductor sensor, if a high voltage is applied to one coil for one minute, a low voltage is repeated for the next 1.5 minutes, and when the high voltage is applied, the sintered body is again formed by Joule heat. When heated to a high temperature of about 350 ° C. and low-pregnant was added, the temperature of the sintered body was lowered to about 100 ° C., and the sensitivity of H 2 was small. When the response was extremely low, measurements were made at a low temperature, and the concentration of CO was selectively measured. The gas adsorbed on the surface of the sintered compact is released.

상기 반도체 센서에 의하여 연소배기가스중의 CO의 농도를 선택적으로 측정하고, 그의 농도가 일정치 이상으로 되면 불완전 연소가 일어나고 있다고 판단하여 경보를 발생하거나, 혹은 LP가스의 유로의 도중차단밸브를 폐쇄하여 CO중독을 미연에 방지할 수 있으나, 그러나 그러기 위해서는 반도체 센서의 히타 겸용의 코일에 인가하는 전압을 주기적으로 고저로 변화시키는 타임어나, 고저의 전압을 절환해서 인가하는 제어장치가 필요하며, 기구가 복잡하여 값이 비싸진다.The concentration of CO in the combustion exhaust gas is selectively measured by the semiconductor sensor, and when the concentration is above a certain value, an incomplete combustion is judged to occur and an alarm is generated, or the intermediate shutoff valve of the LP gas flow path is closed. Although CO poisoning can be prevented in advance, however, this requires a timer that periodically changes the voltage applied to the heater-coiled coil of the semiconductor sensor to high and low, or a control device that switches the high and low voltage. Complicated and expensive

본 발명자등은 상기 반도체 센서에 대하여 연구를 거듭한 결과 센서에 고전압을 가해서 소결체를 고온으로 가열하면 CO와 H2의 쌍방에 대하여 감도를 갖게 되고, 연소배기가스를 이에 접촉시키면 반도체 센서는 연소배기가스중의 시시각각의 CO의 농도와 H2의 농도와의 합계 농도를 표시하는 것을 알아내어 본 발명을 완성하게 되는 것으로서, 금속산화물으로 이루어지는 n형 반도체의 연결체 내부에, 백금속의 합금선으로 이루어지는 한쌍의 코일을 마주향하는 형상으로 내장한 반도체 센서의 상기 한쪽의 코일에 고전압을 연속적으로 인가해서 상기 소결체를 연속적으로 가열하고, 연소배기가스를 소결체에 접촉시킴으로써 연소배기가스중의 CO와 H2의 합계 농도를 전기적으로 출력하고, 연소중에 발생하는 불완전연소를 검출하도록 한 것이다.The inventors have studied the semiconductor sensor as a result of applying a high voltage to the sensor and heating the sintered body to a high temperature has sensitivity to both CO and H 2 , and when contacting the combustion exhaust gas, the semiconductor sensor is in the combustion exhaust gas The present invention was completed by finding the total concentration of CO concentration and H 2 concentration at each time, and a pair of white metal alloy wires were formed inside a connection of an n-type semiconductor made of a metal oxide. A high voltage is continuously applied to one of the coils of the semiconductor sensor having the coils facing each other so that the sintered body is continuously heated, and the combustion exhaust gas is brought into contact with the sintered body so that the total concentration of CO and H 2 in the combustion exhaust gas is changed. And incomplete combustion that occurs during combustion.

[실시예]EXAMPLE

도시한 실시예는 가연성 가스용 반도체 센서(1)를 스위칭회로를 포함하는 제어장치(11)를 통해서 경보부처(12) 및 차단밸브(13)와 연동하여 사용한 경우를 표시하는 것이다.In the illustrated embodiment, the case where the combustible gas semiconductor sensor 1 is used in conjunction with the alarm unit 12 and the shutoff valve 13 through the control device 11 including the switching circuit is shown.

반도체 선서(1)는, 금속산화물, 예컨대 SnO2나 산화철로 이루어지는 n 형 반도체의 소결체(2) 내부에 백금속의 합금선으로 이루어지는 한쌍의 코일(3)과 (4)를 마주보는 형상으로 내장한 공지의 것으로서, 그의 한쪽코일(4)과 히타 겸용으로, 이에는 고전압, 예컨대 약 1V를 연속적으로 인가하고, 소결체(2)를 약 350℃의 고온의 가열상태로 유지한다. 이 반도체 센서(1)는 가정의 주방, 식당 조리장의 천정면, 혹은 천정명으로 부터 아래로 약 30cm이내의 CO 농도가 단시간으로 급상승하는 위치에 설치한다.The semiconductor oath 1 is formed inside a sintered body 2 of an n-type semiconductor made of a metal oxide such as SnO 2 or iron oxide in a shape facing the pair of coils 3 and 4 made of an alloy wire of white metal. As known in the art, in combination with one of the coils 4 and a heater, a high voltage such as about 1 V is continuously applied thereto, and the sintered body 2 is maintained at a high temperature of about 350 ° C. The semiconductor sensor 1 is installed at a position where the CO concentration within about 30 cm rises rapidly from the ceiling surface of a home kitchen, a restaurant kitchen, or the ceiling name in a short time.

이에 의하여, 가스연소기구가 완전연소하고 있을 때는 CO 와 H2는 발생하지 않으므로 제어장치(11)에 대한 반도체 센서의 출력은 발생하는 CO 와 H2의 합계 농도에 대응한 값으로 된다.As a result, CO and H 2 are not generated when the gas combustion mechanism is completely burned, so that the output of the semiconductor sensor to the control device 11 becomes a value corresponding to the total concentration of CO and H 2 generated.

그리하여, 연소배기가스중의 CO 와 H2의 비율은, 다소의 어긋남은 있어도 이란적으로 2대 1이므로, 예컨대 CO 농도가 약 100ppm, H2농도가 약 50ppm 의 합계 농도 150ppm을 설정농도로하고, 이 설정농도때의 반도체 센서의 출력의 값은 실험에 의하여 이미 알려진 것이므로, 제어장치(11)의 스위칭회로를 그의 값의 출력을 반도체 센서로부터 받았을때에 스위치가 들어가도록 설정해놓으면, 연소중에 불완전 연소가 발생하여 CO 와 H2의 합계 농도가 설정 농도에 달했을때 제어장치(11)는 작동해서 경보부자(12)가 울려 불완전 연소의 발생을 경보함과 동시에, 차단밸브(13)가 작동하여 연소기구에 이르는 LP가스의 가스통로(14)를 차단하고, 연소기구에서의 연소를 중지하고, 불완전 연소에 의한 CO 중독사고를 방지한다.Therefore, since the ratio of CO and H 2 in the combustion exhaust gas is two to one in Iran, even if there is some deviation, for example, the total concentration of 150 ppm of CO concentration of about 100 ppm and H 2 concentration of about 50 ppm is set to Since the value of the output of the semiconductor sensor at this set concentration is known by experiments, if the switching circuit of the control device 11 is set to enter the switch when the output of its value is received from the semiconductor sensor, incomplete combustion during combustion Is generated and the total concentration of CO and H 2 reaches the set concentration, the control device 11 operates to alarm the occurrence of incomplete combustion, and the shutoff valve 13 operates to burn. The gas passage 14 of the LP gas leading to the mechanism is shut off, the combustion in the combustion mechanism is stopped, and the CO poisoning accident due to incomplete combustion is prevented.

본 발명에 의하면, 종래부터 H2의 등의 가연성 가스나, CO 의 농도를 선택적으로 측정하고있던 반도체 센서를 사용하고, CO 와 H2쌍방의 농도를 용이하게 측정하여 연소중에 발생하는 위험한 가스의 불완전 연소를 확실히 검출할 수가 있다.According to the present invention, using a flammable gas such as H 2 or a semiconductor sensor which has selectively measured the concentration of CO, it is possible to easily measure the concentration of both CO and H 2 , and thus to detect dangerous gases generated during combustion. Incomplete combustion can be reliably detected.

Claims (1)

금속산화물로 이루어지는 n 형 반도체의 소결체의 내부에, 백금속의 합금선으로 이루어지는 한쌍의 코일을 마주보는 형상으로 내장한 반도체 센서의 상기 한쪽의코일에, 고전압을 연속적으로 인가해서 상기 소경체를 연속적으로 가열하고 연소배기가스를 소결체에 접촉시킴으로써 연소배기 가스중의 CO 와 H2의 합계 농도를 전기적으로 출력하고, 연소중에 발생하는 가스의 불완전 연소를 검출하는 것을 특징으로 하는 불완전 연소의 검출방법.A small voltage is continuously applied by continuously applying a high voltage to one of the coils of the semiconductor sensor in a shape in which a pair of coils made of a white metal alloy wire face each other inside the sintered body of the n-type semiconductor made of a metal oxide. A method for detecting incomplete combustion, characterized by electrically outputting a total concentration of CO and H 2 in the combustion exhaust gas by heating and contacting the combustion exhaust gas with the sintered body, and detecting incomplete combustion of the gas generated during combustion.
KR1019910004652A 1990-03-26 1991-03-25 Detection method of incomplete combustion Expired - Fee Related KR0175667B1 (en)

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JP2073432A JPH0721474B2 (en) 1990-03-26 1990-03-26 Incomplete combustion detection method

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DE2221811A1 (en) * 1972-05-04 1973-11-22 Bayer Ag Process for the production of flameproof foams containing urethane groups
JPS55158550A (en) * 1979-05-29 1980-12-10 Matsushita Electric Ind Co Ltd Gas detecting element

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