CN201007509Y - Household fuel gas detection warning ventilator unit - Google Patents
Household fuel gas detection warning ventilator unit Download PDFInfo
- Publication number
- CN201007509Y CN201007509Y CNU2007201004753U CN200720100475U CN201007509Y CN 201007509 Y CN201007509 Y CN 201007509Y CN U2007201004753 U CNU2007201004753 U CN U2007201004753U CN 200720100475 U CN200720100475 U CN 200720100475U CN 201007509 Y CN201007509 Y CN 201007509Y
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- CN
- China
- Prior art keywords
- power circuit
- output end
- relay
- fan
- fuel gas
- 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 - Fee Related
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Abstract
The utility model relate to a coal gas monitoring device, in particular to a domestic coal gas detecting, alarming and ventilation device. The utility model comprises a transformer T, a power circuit, an air sensor Q which is connected with the output end of the power circuit, a multivibrator formed by a 555 clock chip and periphery resistances, and a fan which is driven by a motor M. The heating electrodes F and F' of the air sensor Q are connected with the output end of the power circuit via a voltage-stabilization chip 7805. Detecting electrodes A and B are connected with the output end of the power circuit via a variable resistor RP1, the expansion end of the variable resistor RP1 is connected with the input end of the 555 clock chip, the output end of the 555 clock chip is connected with a parallel branch of a loudspeaker and a relay J, and the normally open contact J1 of the relay J is in series connected with the power circuit of the motor M. The utility model can automatically audibly alarm, visually alarm and can instantly open the fan to ventilate once the concentration achieves the warning value, which increases the safety and reliability while using coal stoves.
Description
Technical field
The utility model relates to a kind of coal gas supervising device, is specially a kind of household fuel gas detection alarm ventilation unit.
Background technology
As everyone knows, coal gas is that CO gas has extremely strong toxicity to human body.Thing, the particularly most of families in the rural area that gas poisoning takes place in the family that uses coal furnace are especially easily used coal stove for heating for a long time and are heated up water, and the incident of gas poisoning takes place through regular meeting when the ventilation in night is smooth.And equipment and instrument complex structure, the volume ratio of existing detection coal gas are bigger, are not suitable for using in the family.
Summary of the invention
The utility model provides a kind of household fuel gas detection alarm ventilation unit in order to solve the problem that the coal gas context of detection exists in the family in the prior art.
The utility model is realized by following technical scheme, a kind of household fuel gas detection alarm ventilation unit, comprise by transformer T, the power circuit that bridge rectifier is formed, the gas sensor Q that is connected with power circuit output end, the multivibrator of forming by 555 clock chips and peripheral resistance, fan by the motor M driving, the heating electrode F of gas sensor Q, F` is connected in power circuit output end through voltage stabilizing chip 7805, detecting electrode A, B is connected in power circuit output end through variable resistance RP1, the movable end of variable resistance RP1 is connected with 555 clock chip inputs, the output of 555 clock chips is connected with the parallel branch of loudspeaker and relay J, and the normally opened contact J1 of relay J is serially connected with the power supply circuits of fan driving motor M.
Gas sensor adopts the QM-25 type, is the more intense gas sensor of a kind of versatility, is applicable to the detection of multiple toxic gases such as natural gas, carbon monoxide, liquefied petroleum gas, coal gas.
The groundwork process is, when the poisonous inflammable gas in the room air rises to certain value, after gas sensor touches poisonous inflammable gas, resistance between its detecting electrode reduces, gas sensor output HIGH voltage signal is given 555 clock chips, after gas concentration reaches certain value, the multivibrator that 555 clock chips and peripheral resistance thereof constitute is started working, 555 clock chip output AC signals, one the road drives alarm speaker sends alarm sound, one the road drives relay makes the power supply branch road conducting that is connected with electrical machinery of ventilator, and the driven by motor ventilating fan is extracted air out outdoor, and alarm lamp is bright simultaneously.
Compared with prior art, the utility model is simple in structure, especially adopted the circuit of highly sensitive sensor and warning reliably and Synchronization Control exhaust equipment, the concentration of the indoor poisonous coal gas of Sensitive Detection constantly, and can automatic sound warning after concentration reaches warning value, light warning and open ventilating fan at once and ventilate, improved the security reliability when people use coal stove.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model
The specific embodiment
Anticipate as shown in drawings,
A kind of household fuel gas detection alarm ventilation unit, comprise by transformer T, the power circuit that bridge rectifier is formed, the gas sensor Q that is connected with power circuit output end, the multivibrator of forming by 555 clock chips and peripheral resistance, fan by the motor M driving, the heating electrode F of gas sensor Q, F` is connected in power circuit output end through voltage stabilizing chip 7805, detecting electrode A, B is connected in power circuit output end through variable resistance RP1, the movable end of variable resistance RP1 is connected with 555 clock chip inputs, the output of 555 clock chips is connected with the parallel branch of loudspeaker and relay J, and the normally opened contact J1 of relay J is serially connected with the power supply circuits of fan driving motor M.
Also be parallel with alarm lamp R on the parallel branch of loudspeaker and relay J.
Specifically be connected to, the output of detecting electrode B end connects variable resistor RP1, variable resistor RP1 is connected with 4 pin of 555 clock chips, 3 pin of 555 clock chips are connected with the parallel branch of alarm speaker B, alarm lamp R, relay J formation, and 3 pin output AC signals of 555 clock chips can drive alarm speaker B, alarm lamp R, relay J work simultaneously.Variable resistor RP1 is used for adjusting the sensitivity of circuit, i.e. the warning critical point of gas concentration.
Claims (2)
1. household fuel gas detection alarm ventilation unit, it is characterized in that: comprise by transformer T, the power circuit that bridge rectifier is formed, the gas sensor Q that is connected with power circuit output end, the multivibrator of forming by 555 clock chips and peripheral resistance, fan by the motor M driving, the heating electrode F of gas sensor Q, F ' is connected in power circuit output end through voltage stabilizing chip 7805, detecting electrode A, B is connected in power circuit output end through variable resistance RP1, the movable end of variable resistance RP1 is connected with 555 clock chip inputs, the output of 555 clock chips is connected with the parallel branch of loudspeaker and relay J, and the normally opened contact J1 of relay J is serially connected with the power supply circuits of fan driving motor M.
2. household fuel gas detection alarm ventilation unit according to claim 1 is characterized in that: also be parallel with alarm lamp R on the parallel branch of loudspeaker and relay J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201004753U CN201007509Y (en) | 2007-01-25 | 2007-01-25 | Household fuel gas detection warning ventilator unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201004753U CN201007509Y (en) | 2007-01-25 | 2007-01-25 | Household fuel gas detection warning ventilator unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201007509Y true CN201007509Y (en) | 2008-01-16 |
Family
ID=39003456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201004753U Expired - Fee Related CN201007509Y (en) | 2007-01-25 | 2007-01-25 | Household fuel gas detection warning ventilator unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201007509Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680075A (en) * | 2013-12-20 | 2014-03-26 | 苏州经贸职业技术学院 | Coal gas alarm with anion generator |
| CN104952217A (en) * | 2014-11-22 | 2015-09-30 | 成都颉盛科技有限公司 | High-sensitivity gas detection and alarm system based on phase-sensitive detection circuit |
| CN110133060A (en) * | 2019-06-11 | 2019-08-16 | 湖南碧霄环境科技有限公司 | The carbon monoxide detection system of environment measuring |
-
2007
- 2007-01-25 CN CNU2007201004753U patent/CN201007509Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680075A (en) * | 2013-12-20 | 2014-03-26 | 苏州经贸职业技术学院 | Coal gas alarm with anion generator |
| CN104952217A (en) * | 2014-11-22 | 2015-09-30 | 成都颉盛科技有限公司 | High-sensitivity gas detection and alarm system based on phase-sensitive detection circuit |
| CN110133060A (en) * | 2019-06-11 | 2019-08-16 | 湖南碧霄环境科技有限公司 | The carbon monoxide detection system of environment measuring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080116 |