CN204102293U - Poisonous and harmful combustible gas leakage sound and light alarm device - Google Patents
Poisonous and harmful combustible gas leakage sound and light alarm device Download PDFInfo
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- CN204102293U CN204102293U CN201420632041.8U CN201420632041U CN204102293U CN 204102293 U CN204102293 U CN 204102293U CN 201420632041 U CN201420632041 U CN 201420632041U CN 204102293 U CN204102293 U CN 204102293U
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Abstract
The utility model is that its feature comprises about a kind of poisonous and harmful combustible gas leakage sound and light alarm device: 9V direct supply, Detection Circuit, time delay and critical value sampling circuit, signal composite amplifier and acousto-optic warning circuit; Described Detection Circuit is made up of gas sensor QM, resistance R1 and linear potentiometer RP1, and the model that gas sensor QM selects is QM-N5; Described time delay and critical value sampling electric routing switch diode D1, electrochemical capacitor C1, resistance R2, linear potentiometer RP2 form; Described signal composite amplifier and acousto-optic warning circuit are made up of NPN transistor VT1, resistance R3, PNP transistor VT2, NPN transistor VT3, hummer HA and LED.The utility model utilizes gas sensor as detecting element, is applicable to the detection of the Leakage Gas such as rock gas, coal gas, carbon monoxide, alkanes, alcohols.
Description
Technical field
The utility model belongs to detection of electrons and gas safe technical field, is about a kind of poisonous and harmful combustible gas leakage sound and light alarm device.
Background technology
Most of resident uses liquefied gas or rock gas to cook, cooks, boiling water, in the process of hotting plate, soup spill happens occasionally, this is easy to the flame of combustion gas on kitchen range to put out, cause gas leakage to indoor, once fail Timeliness coverage, likely lead to fire failure, likely cause any property loss or life threatening.
The Fuel Gas Leak Alarm majority that market is sold is mounted on the lampblack absorber on kitchen range top, detect gas leakage and be confined in this very little region of kitchen range, and gas leakage just can detect to during finite concentration.
In order to solve or make up the many disadvantages that gas alarm device on the market exists, poisonous and harmful combustible gas leakage sound and light alarm device described in the utility model utilizes gas sensor as detecting element, it is applicable to the detection that the escaping gases such as rock gas, coal gas, carbon monoxide, alkanes, alcohols leak, and can the smog that the fire such as timber, paper, cloth, woolen, rubber, plastic products and grease are formed be detected and alarm in time, can be used for the monitoring in the places such as family, shop, warehouse.
Below describe the core technology content that poisonous and harmful combustible gas leakage sound and light alarm device described in the utility model is involved in implementation process in detail.
Utility model content
Goal of the invention and beneficial effect: in order to solve or make up the many disadvantages that gas alarm device on the market exists, poisonous and harmful combustible gas leakage sound and light alarm device described in the utility model utilizes gas sensor as detecting element, it is applicable to rock gas, coal gas, carbon monoxide, alkanes, the detection that the escaping gases such as alcohols leak, and can to timber, paper, cloth, woolen, rubber, the smog that the fire such as plastic products and grease is formed detects and alarm in time, can be used for family, shop, the monitoring in the places such as warehouse, there is good use value.
Circuit working principle: poisonous and harmful combustible gas leakage sound and light alarm device is made up of harmful gas testing circuit, composite amplifier and acousto-optic warning circuit.Harmful gas testing circuit is made up of gas sensor QM-N5, potentiometer RP1, potentiometer RP2, switching diode D1.Gas sensor QM-N5 is N-type semiconductor element, and as detection of gas head, it is a kind of novel low-power consumption, highly sensitive gas sensor, and there are a heater strip and a pair exploring electrode in its inside.Audible and visual alarm circuit is made up of LED and hummer HA.
When not containing toxic and harmful in air, gas sensor QM (model is QM-N6) does not contact toxic and harmful, as: the gases such as carbon monoxide, coal gas, liquefied petroleum gas (LPG), or concentration of toxic gases very low time, resistance value between gas sensor QM two electrode is very large, at this moment switching diode D1 not conducting, make NPN transistor VT1, PNP transistor VT2, NPN transistor VT3 all be in cut-off state, audible and visual alarm circuit does not work.When the harmful gas concentration of monitoring area reaches certain value, resistance between gas sensor QM two electrode reduces rapidly, so the 4th pin of gas sensor QM and the 6th pin voltage raise rapidly, make switching diode D1 conducting, at this moment due to electrochemical capacitor C1, (delay time is very short for the time-lag action of resistance R2 delay circuit, mainly in order to prevent malfunction), time delay terminates rear NPN transistor VT1, PNP transistor VT2, the equal saturation conduction of NPN transistor VT3, make hummer HA sounding, LED is luminous, achieve toxic and harmful Alerting requirements.
When the concentration decline of toxic gas arrives certain numerical value, NPN transistor VT1 base voltage declines rapidly.Last NPN transistor VT1, PNP transistor VT2, NPN transistor VT3 come back to cut-off state, hummer HA and the equal dead electricity of LED and quit work.
Accompanying drawing explanation
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides a poisonous and harmful combustible gas leakage sound and light alarm device.
Embodiment
According to the poisonous and harmful combustible gas leakage sound and light alarm device circuit working schematic diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in utility model content, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the utility model, is further described the utility model correlation technique below in conjunction with embodiment.
Technical scheme: poisonous and harmful combustible gas leakage sound and light alarm device, it comprises 9V direct supply, Detection Circuit, time delay and critical value sampling circuit, signal composite amplifier and acousto-optic warning circuit, it is characterized in that:
Detection Circuit: it is made up of gas sensor QM, resistance R1 and linear potentiometer RP1, the model that gas sensor QM selects is QM-N5, gas sensor QM the 1st pin and the 3rd pin connection circuit positive pole VCC, gas sensor QM the 2nd pin is by resistance R1 connection circuit positive pole VCC, gas sensor QM the 5th pin connects linear potentiometer RP1 one end, 4th pin and the 6th pin of the linear potentiometer RP1 other end and movable end connection circuit ground GND, gas sensor QM connect time delay and critical value sampling circuit;
Time delay and critical value sampling circuit: it is made up of switching diode D1, electrochemical capacitor C1, resistance R2, linear potentiometer RP2,4th pin and the 6th pin of gas sensor QM connect switching diode D1 positive pole, switching diode D1 negative pole connects electrochemical capacitor C1 positive pole and resistance R2 one end and linear potentiometer RP2 one end, electrochemical capacitor C1 negative pole and the linear potentiometer RP2 other end and movable end connection circuit ground another termination signal composite amplifier of GND, resistance R2 thereof;
Signal composite amplifier and acousto-optic warning circuit: it is by NPN transistor VT1, resistance R3, PNP transistor VT2, NPN transistor VT3, hummer HA and LED composition, NPN transistor VT1 collector connects LED negative pole and resistance R3 one end, LED positive pole and resistance R3 other end connection circuit positive pole VCC, the emitter connection circuit ground GND of NPN transistor VT1, NPN transistor VT1 collector connects PNP transistor VT2 base stage, PNP transistor VT2 collector connects NPN transistor VT3 base stage, PNP transistor VT2 emitter connects hummer HA negative pole and NPN transistor VT3 collector, hummer HA positive pole connection circuit positive pole VCC, NPN transistor VT3 emitter connection circuit ground GND,
9V DC power anode is connected with circuit anode VCC, and 9V DC power cathode is connected with circuit ground GND.
The technical parameter of components and parts and selection requirement
QM is gas sensor, and the model selected is QM-N5, or selects QM211;
The model of NPN transistor VT1, NPN transistor VT3 is 2SC9013, requires β > 150;
The model of PNP transistor VT2 is 2SC9012, requires β > 150;
D1 is switching diode, and the model selected is 1N4148;
Resistance uses metalfilmresistor, and the resistance of resistance R1 is 82 Ω, power is 1/2W; Resistance R2 resistance is 1K Ω, and the resistance of resistance R3 is 47K Ω;
C1 is electrochemical capacitor, and its capacity is 1000 μ F, operating voltage 16V;
RP1 is linear potentiometer, and the resistance of employing is 15 Ω, power is the solid potentiometer of 1/2W;
RP2 is linear potentiometer, and the resistance of employing is 100K Ω, power is the solid potentiometer of 1/2W;
LED is light emitting diode, and the model selected is ￠ 5 red light emitting diodes;
HA is hummer, selects solderable and is built-in with audio generating circuit hummer, operating voltage 7.5V.
Circuit production main points and circuit debugging
Because the circuit structure of poisonous and harmful combustible gas leakage sound and light alarm device is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, circuit of the present utility model does not need to debug substantially, and connecting 9V direct supply can normally work;
When circuit debugging, certain density inflammable gas or smog sample are put into and detects bottle or sales kit (SK), carefully the resistance of adjustment linear potentiometer RP2, be aided with adjustment linear potentiometer RP1, make Detection Circuit be in more satisfactory critical conditions;
In order to detect inflammable gas and smog leakage, can to cover room wider, harmful combustible gas leakage sound and light alarm device can be placed in appropriate location, kitchen;
After being opened by the 9V direct supply of harmful combustible gas leakage sound and light alarm device, what user can be relieved leaves gas kitchen ranges.
Not gordian technique of the present utility model as circuit components layout of the present utility model, board design, outward appearance and size etc., neither the claimed technology contents of the utility model, therefore illustrate no longer one by one in the description.
Claims (1)
1. a poisonous and harmful combustible gas leakage sound and light alarm device, it comprises 9V direct supply, Detection Circuit, time delay and critical value sampling circuit, signal composite amplifier and acousto-optic warning circuit, it is characterized in that:
Described Detection Circuit is made up of gas sensor QM, resistance R1 and linear potentiometer RP1, the model that gas sensor QM selects is QM-N5, gas sensor QM the 1st pin and the 3rd pin connection circuit positive pole VCC, gas sensor QM the 2nd pin is by resistance R1 connection circuit positive pole VCC, gas sensor QM the 5th pin connects linear potentiometer RP1 one end, 4th pin and the 6th pin of the linear potentiometer RP1 other end and movable end connection circuit ground GND, gas sensor QM connect time delay and critical value sampling circuit;
Described time delay and critical value sampling electric routing switch diode D1, electrochemical capacitor C1, resistance R2, linear potentiometer RP2 form, 4th pin and the 6th pin of gas sensor QM connect switching diode D1 positive pole, switching diode D1 negative pole connects electrochemical capacitor C1 positive pole and resistance R2 one end and linear potentiometer RP2 one end, electrochemical capacitor C1 negative pole and the linear potentiometer RP2 other end and movable end connection circuit ground another termination signal composite amplifier of GND, resistance R2 thereof;
Described signal composite amplifier and acousto-optic warning circuit are by NPN transistor VT1, resistance R3, PNP transistor VT2, NPN transistor VT3, hummer HA and LED composition, NPN transistor VT1 collector connects LED negative pole and resistance R3 one end, LED positive pole and resistance R3 other end connection circuit positive pole VCC, the emitter connection circuit ground GND of NPN transistor VT1, NPN transistor VT1 collector connects PNP transistor VT2 base stage, PNP transistor VT2 collector connects NPN transistor VT3 base stage, PNP transistor VT2 emitter connects hummer HA negative pole and NPN transistor VT3 collector, hummer HA positive pole connection circuit positive pole VCC, NPN transistor VT3 emitter connection circuit ground GND,
Described 9V DC power anode is connected with circuit anode VCC, and 9V DC power cathode is connected with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420632041.8U CN204102293U (en) | 2014-10-28 | 2014-10-28 | Poisonous and harmful combustible gas leakage sound and light alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420632041.8U CN204102293U (en) | 2014-10-28 | 2014-10-28 | Poisonous and harmful combustible gas leakage sound and light alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204102293U true CN204102293U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420632041.8U Expired - Fee Related CN204102293U (en) | 2014-10-28 | 2014-10-28 | Poisonous and harmful combustible gas leakage sound and light alarm device |
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| Country | Link |
|---|---|
| CN (1) | CN204102293U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299370A (en) * | 2014-10-28 | 2015-01-21 | 黄月华 | Audible and visual alarm device for poisonous and harmful combustible gas leakage |
-
2014
- 2014-10-28 CN CN201420632041.8U patent/CN204102293U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299370A (en) * | 2014-10-28 | 2015-01-21 | 黄月华 | Audible and visual alarm device for poisonous and harmful combustible gas leakage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20151028 |
|
| EXPY | Termination of patent right or utility model |