CN2094085U - Microminiature fire alarm - Google Patents
Microminiature fire alarm Download PDFInfo
- Publication number
- CN2094085U CN2094085U CN 91209380 CN91209380U CN2094085U CN 2094085 U CN2094085 U CN 2094085U CN 91209380 CN91209380 CN 91209380 CN 91209380 U CN91209380 U CN 91209380U CN 2094085 U CN2094085 U CN 2094085U
- Authority
- CN
- China
- Prior art keywords
- circuit
- microminiature
- gas
- utility
- potentiometer
- 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.)
- Withdrawn
Links
Landscapes
- Emergency Alarm Devices (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model relates to a microminiature gas alarm, which is a gas-sensitive alarm device. The utility model is composed of a high-sensitivity semiconductor gas sensing element, a diagnostic and regulating circuit and an integrated alarm circuit. The utility model has the advantages of high sensitivity and reliable and stable performance, and the volume is equal to the volume of a cigarette packet. The utility model is an ideal portable detecting device of inflammable and explosive gases.
Description
The utility model belongs to the air-sensitive pick-up unit that flammable explosive gas detects.
China produces and the inflammable and explosive pick-up unit of use such as the gas alarm apparatus of mine at present, explosion-proof measuring instrument HRB-IS of mixed combustible gas and improvement shape etc., generally all be as detecting element with the platinum filament catalysis element, it is placed an arm of balanced bridge, and be energized by the power and be heated to working temperature, inflammable gas enters air chamber and carry out flameless burning on the platinum filament catalysis element, emits oxidation reaction heat, causes that the platinum filament element heats up, the resistance of platinum filament increases, break and cherished the balance of electric bridge, detect the microampere meter internal resistance, through amplifying as the signal source, swing to etc. a series of signal handle amplify after, start oscillator, promote the sound and light alarm element, obtain the sound and light alarm effect.This class warning instrument, the one, volume is bigger, is not easy to carry, the 2nd, the components and parts that adopt are many, the price comparison costliness, great majority all more than hundreds of units, adopt discrete component many, and discreteness is bigger, the machine debugging more complicated.Though some producer has done a little improvement to original detecting instrument in recent years, the instrument volume also dwindles to some extent, but does not break away from original mentality of designing, does not still accomplish as cigarette case size, the people's that can pack into pocket.
The purpose of this utility model adopts novel gas sensor to replace original platinum filament to detect bridge circuit, improves detection sensitivity, reduces inner member.Warning circuit adopts integrated circuit, and alarm adopts superminiature news Chinese percussion instrument.The machine sensitivity height, stable and reliable for performance, cost is low, and components and parts are few, can be made into the microminiature gas alarming device of picture cigarette case size.
The utility model as shown in drawings, by power supply, gas detection, diagnosis and sensitivity adjusting and warning 4 parts are formed.
Power supply is composed in series by three joint 1.5V capacity batteries, and power supply is indicated by resistance R
1Form with LED.When power switch K closed, the 4.5V current/voltage was added on the entire circuit, and through resistance R
1, electric current flows through LED, makes that LED is luminous to be indicated as power supply.
Gas detection adopts N-type semiconductor gas sensor QN-N5.
Electric quick original paper QN, resistance R
3, potentiometer W
1, W
2Form the series connection bleeder circuit, in the air of cleaning, the gas sensor of energising is high value, potentiometer W
1Last terminal potential is very low, and diode D is in cut-off state, and controllable silicon SCR control is reported the triggerless signal and not conducting, resistance R
4The upper end is in electronegative potential, and warning circuit non-transformer voltage is not worked.
When the flammable explosive gas that leaks surpassed finite concentration, gas sensor QN test side resistance reduced potentiometer W rapidly
1Last terminal potential improves rapidly, through potentiometer W
1Moving contact is exported a noble potential, makes diode D conducting, and controllable silicon SCR control newspaper obtains trigger signals, makes it conducting, resistance R
4The upper end obtains noble potential, and warning circuit AIC obtains supply voltage and produces alarm signal, promotes superminiature news Chinese percussion instrument Y through triode Q amplification and sends chimes of doom.
Sensitivity of the present utility model is for adjustable continuously, and the detected voltage signal of gas sensor QN is through potentiometer W
1Moving contact output.As potentiometer W
1Moving contact to current potential R
3Approaching, promptly to the public domain termination when near, the above earth potential of moving contact reduces, and detection sensitivity is low.Otherwise detection sensitivity height.Because potentiometer W
1For adjustable continuously, so it helps this machine and carries out adjusting of explosion-proof performance index.Potentiometer W
2Be the potentiometer of a belt switch K, when K switch is closed energized, potentiometer W
2Moving contact be in minimum position, its resistance is zero, (referring to accompanying drawing) is with potentiometer W
1The signal shorted to earth of moving contact output.Because of QN series gas sensor is the N-type semiconductor device, during no power, the resistance value that the hole is presented in its detection is very little, must energising after 5 minutes, and its resistance just can become greatly, so utilize potentiometer W when starting shooting
2Moving contact with potentiometer W
1The signal shorted to earth of output prevents wrong report.After 5 minutes, with potentiometer W
2Place maximal value, because of potentiometer W
2Resistance very big, so by potentiometer W
1The signal of moving contact output waltzs through diode D, promotes the back circuit, makes the complete machine operate as normal.
The utility model volume little (110 * 60 * 23mm), detection sensitivity height, CH
4Content is that 1%-1.5% reports to the police in air, and town gas is that 0.03%-0.04% reports to the police, and oil liquefied gas is that 0.5%-0.6% reports to the police, and helps adjusting of this machine.It is short to detect the response time, about 5 seconds.The scope of application is wider, to coal gas, and no combustion gas, the leakage of oil liquefied gas etc. all can detect, and is stable and reliable for performance, and price is low, and it is the very strong explosion-proof detecting instrument of a kind of portable applicability.
Claims (3)
1, a kind of by detecting element, amplify the microminiature gas alarm that adjusting and warning circuit and power supply are formed, what it is characterized in that its detecting element adopts is highly sensitive semiconductor gas sensor, amplification regulating circuit has adopted the circuit with diagnosis and sensitivity adjusting, and warning circuit has adopted integrated circuit and superminiature news Chinese percussion instrument.
2, microminiature gas alarm according to claim 1 is characterized in that diagnosis and regulating circuit are by QN series N-type semiconductor gas sensor, resistance R
3, potentiometer W
1, W
2The series connection bleeder circuit of forming.
3, microminiature gas alarm according to claim 1 is characterized in that it has one by diode D, controllable silicon SCR, integrated circuit AIC, the warning circuit that triode Q and superminiature news Chinese percussion instrument Y form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91209380 CN2094085U (en) | 1991-06-05 | 1991-06-05 | Microminiature fire alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91209380 CN2094085U (en) | 1991-06-05 | 1991-06-05 | Microminiature fire alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2094085U true CN2094085U (en) | 1992-01-22 |
Family
ID=4918364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91209380 Withdrawn CN2094085U (en) | 1991-06-05 | 1991-06-05 | Microminiature fire alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2094085U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104293A (en) * | 2013-01-20 | 2013-05-15 | 任国祚 | Slice type gas alarm |
| CN103184886A (en) * | 2011-12-30 | 2013-07-03 | 国家纳米技术与工程研究院 | Measuring component of MEMS (Micro-electromechanical Systems) technology-based gas alarm and preparation method of measuring component |
| CN103716933A (en) * | 2012-09-28 | 2014-04-09 | 深圳市海洋王照明工程有限公司 | Combustible gas detection alarm lighting circuit and apparatus |
| CN103729970A (en) * | 2012-10-13 | 2014-04-16 | 成都进界科技有限公司 | Low-power-consumption gas leakage alarm |
| CN103184886B (en) * | 2011-12-30 | 2016-12-14 | 国家纳米技术与工程研究院 | A kind of measurement parts of gas alarm based on MEMS technology and preparation method thereof |
-
1991
- 1991-06-05 CN CN 91209380 patent/CN2094085U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184886A (en) * | 2011-12-30 | 2013-07-03 | 国家纳米技术与工程研究院 | Measuring component of MEMS (Micro-electromechanical Systems) technology-based gas alarm and preparation method of measuring component |
| CN103184886B (en) * | 2011-12-30 | 2016-12-14 | 国家纳米技术与工程研究院 | A kind of measurement parts of gas alarm based on MEMS technology and preparation method thereof |
| CN103716933A (en) * | 2012-09-28 | 2014-04-09 | 深圳市海洋王照明工程有限公司 | Combustible gas detection alarm lighting circuit and apparatus |
| CN103729970A (en) * | 2012-10-13 | 2014-04-16 | 成都进界科技有限公司 | Low-power-consumption gas leakage alarm |
| CN103104293A (en) * | 2013-01-20 | 2013-05-15 | 任国祚 | Slice type gas alarm |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3877291A (en) | Portable breath tester | |
| WO2007134040A1 (en) | Personal breathalyzer having digital circuitry | |
| CN207319416U (en) | hazardous gas leakage alarm | |
| CN2094085U (en) | Microminiature fire alarm | |
| US4166380A (en) | Quantitative measuring system for combustible gas with audible tick rate | |
| CN209928576U (en) | Smoke detector based on temperature sensing and combustible gas detection functions | |
| CN101738420A (en) | Whole-range combustible gas detector | |
| US3961900A (en) | Combustible vapor detector | |
| CN200996557Y (en) | Portable air inspecter | |
| CN209168348U (en) | Multi-functional fire warning circuit and device | |
| JP2702272B2 (en) | Gas detector | |
| CN205879854U (en) | Indoor how gaseous detection device | |
| US4389124A (en) | Device for monitoring selected operating conditions of combustion within a solid fossil fuel burning furnace | |
| CN1374516A (en) | Pipeline gas leakage detecting method | |
| CN210440838U (en) | Fixing table for combustible gas alarm calibrating device | |
| CN201035701Y (en) | Gas alarm | |
| CN207675722U (en) | One kind being used for bushing oil and gas composite on-Line Monitor Device | |
| CN203308522U (en) | Simple gas alarming circuit device | |
| CN212906540U (en) | Intelligent combustible gas detector and alarm system | |
| CN209842818U (en) | Temperature-sensing smoke detector based on CO and combustible gas detection function | |
| CN2076643U (en) | Ion flame sensing type auto-protector for igniting and putting out fire | |
| CN211878719U (en) | Portable combustible gas detector | |
| CN217443228U (en) | Gas monitoring device | |
| CN103306726A (en) | Simple gas alarm circuit device | |
| CN219573910U (en) | Infrared optical methane detection handheld device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |