CN103729970A - Low-power-consumption gas leakage alarm - Google Patents
Low-power-consumption gas leakage alarm Download PDFInfo
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- CN103729970A CN103729970A CN201210386397.3A CN201210386397A CN103729970A CN 103729970 A CN103729970 A CN 103729970A CN 201210386397 A CN201210386397 A CN 201210386397A CN 103729970 A CN103729970 A CN 103729970A
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- potentiometer
- gas sensor
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Abstract
The invention discloses a low-power-consumption gas leakage alarm which comprises an alternating current power source, a power source circuit, a gas sensor, a first potentiometer, a second potentiometer, a fifth diode, a silicon controlled rectifier, a forth capacitor, a relay, a loudspeaker and a fan motor. The gas sensor and the second potentiometer form a voltage divider to detect air. When there is no combustible gas in the air, bulk resistance between a positive pole input end and a negative pole input end of the gas sensor is large, outputs voltages of the second potentiometer are lower than 2.5V, and the gas sensor is in a still state; when the gas content in the air increases, output voltages of the second potentiometer are higher than 2.5V, the gas sensor is connected, the relay is closed, a first normally-open switch of the relay is closed, and an exhaust fan is powered on and operates to exhaust air. According to the low-power consumption gas leakage alarm, starting control sensitivity of circuit alarming can be changed by adjusting resistance of the potentiometers, and the low-power consumption gas leakage alarm has the advantages of being stable in performance, little in power consumption, simple in circuit, and convenient to install and adjust.
Description
Technical field
The present invention relates to a kind of warning device, relate in particular to a kind of low-power consumption gas leakage alarm.
Background technology
At present family's cooking, what cook is all to use coal gas; but in use course of gas; usually can forget turn out the gas valve, thereby cause gas leak poisoning, existing gas leakage alarm unstable properties, power consumption are large, circuit more complicated, Installation and Debugging are inconvenient to be unfavorable for popularizing.
Summary of the invention
Object of the present invention is just to provide in order to address the above problem a kind of low-power consumption gas leakage alarm.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes AC power, power circuit, gas sensor, the first potentiometer, the second potentiometer, the 5th diode, controllable silicon, the 4th capacitor, relay, loudspeaker and fan electromotor, the electrode input end of described gas sensor respectively with the cathode output end of described power circuit, the first end of described the first potentiometer, the sliding end of described the first potentiometer, described the 5th negative pole of diode and the first end of relay are connected, and the second end of described the first potentiometer is connected with the first hot junction of described gas sensor, the second hot junction of described gas sensor respectively with the cathode output end of described power circuit, the first end of described the 4th capacitor, the first end of described the second potentiometer is connected with described silicon controlled is anodal, the second end of described relay is connected with positive pole and the described silicon controlled negative pole of described the 5th diode respectively, the negative input of described gas sensor is connected with the second end of described the second potentiometer and the second end of described the 4th capacitor respectively, and described silicon controlled control end is connected with the sliding end of described the second potentiometer.
Particularly, described loudspeaker is connected with cathode output end and the cathode output end of described power circuit respectively with second rear its two ends of normal open switch series connection of described relay, and described fan electromotor is connected with the two ends of described AC power respectively with first rear its two ends of normal open switch series connection of described relay.
Beneficial effect of the present invention is:
The present invention can the resistance by regulator potentiometer changes the sensitivity of starting to control of circuit alarm, has stable performance, power consumption is few, circuit is simple, Installation and Debugging advantage easily.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: the present invention includes AC power, power circuit, gas sensor QM, the first potentiometer RP1, the second potentiometer RP2, the 5th diode VD5, controllable silicon SCR, the 4th capacitor C4, relay K, loudspeaker B and fan electromotor M, the electrode input end a of gas sensor QM respectively with the cathode output end of power circuit, the first end of the first potentiometer RP1, the sliding end of the first potentiometer RP1, the 5th negative pole of diode VD5 and the first end of relay K are connected, and the second end of the first potentiometer RP1 is connected with the first hot junction f of gas sensor QM, the second hot junction f ' of gas sensor QM respectively with the cathode output end of power circuit, the first end of the 4th capacitor C4, the second first end of potentiometer RP2 and the positive pole of controllable silicon SCR are connected, the second end of relay K is connected with the 5th positive pole of diode VD5 and the negative pole of controllable silicon SCR respectively, the negative input k of gas sensor QM is connected with the second end of the second potentiometer RP2 and the second end of the 4th capacitor C4 respectively, the control end of controllable silicon SCR is connected with the sliding end of the second potentiometer RP2, loudspeaker B is connected with cathode output end and the cathode output end of power circuit respectively with second rear its two ends of normal open switch K-2 series connection of relay K, and fan electromotor M is connected with the two ends of AC power respectively with first rear its two ends of normal open switch K-1 series connection of relay K.
As shown in Figure 1, principle of work of the present invention is as follows:
A, the k utmost point and the second potentiometer RP2 composition voltage divider of gas sensor detect air, when in air during without inflammable gas, bulk resistor between gas sensor a, k is very large, and the second potentiometer RP2 output voltage is lower than 2.5V, and gas sensor QM remains static.If gas content increases in air, bulk resistor between gas sensor a, k diminishes, the second potentiometer RP2 output voltage increases, when gas content in air increases, can make more than the second potentiometer RP2 output voltage reaches 2.5V gas sensor QM conducting, relay K adhesive, relay the first normal open switch K-1 closure, the power supply of connection extraction fan, makes its running air draft; The closed power supply of connecting loudspeaker B in its bis-Chang Kaikai K switch-2, makes its energising send loud chimes of doom.When gas composition in air drains while being less than standard value, it is large that the bulk resistor of gas sensor becomes, and executive circuit open circuit returns to original stationary state.
Claims (2)
1. a low-power consumption gas leakage alarm, is characterized in that: comprise AC power, power circuit, gas sensor, the first potentiometer, the second potentiometer, the 5th diode, controllable silicon, the 4th capacitor, relay, loudspeaker and fan electromotor, the electrode input end of described gas sensor respectively with the cathode output end of described power circuit, the first end of described the first potentiometer, the sliding end of described the first potentiometer, described the 5th negative pole of diode and the first end of relay are connected, and the second end of described the first potentiometer is connected with the first hot junction of described gas sensor, the second hot junction of described gas sensor respectively with the cathode output end of described power circuit, the first end of described the 4th capacitor, the first end of described the second potentiometer is connected with described silicon controlled is anodal, the second end of described relay is connected with positive pole and the described silicon controlled negative pole of described the 5th diode respectively, the negative input of described gas sensor is connected with the second end of described the second potentiometer and the second end of described the 4th capacitor respectively, and described silicon controlled control end is connected with the sliding end of described the second potentiometer.
2. low-power consumption gas leakage alarm according to claim 1, it is characterized in that: described loudspeaker is connected with cathode output end and the cathode output end of described power circuit respectively with second rear its two ends of normal open switch series connection of described relay, described fan electromotor is connected with the two ends of described AC power respectively with first rear its two ends of normal open switch series connection of described relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210386397.3A CN103729970A (en) | 2012-10-13 | 2012-10-13 | Low-power-consumption gas leakage alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210386397.3A CN103729970A (en) | 2012-10-13 | 2012-10-13 | Low-power-consumption gas leakage alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103729970A true CN103729970A (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210386397.3A Pending CN103729970A (en) | 2012-10-13 | 2012-10-13 | Low-power-consumption gas leakage alarm |
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| CN (1) | CN103729970A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299371A (en) * | 2014-11-10 | 2015-01-21 | 周芸 | Combustible gas leakage audible and visual alarm |
| CN105758898A (en) * | 2016-04-15 | 2016-07-13 | 中国科学院过程工程研究所 | High-sensitivity self-feedback type alarm circuit for gas sensor |
| CN113358816A (en) * | 2021-04-21 | 2021-09-07 | 黄冈格罗夫氢能汽车有限公司 | Energy-saving hydrogen concentration alarm sensor and alarm method for hydrogen fuel automobile |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049384U (en) * | 1988-12-27 | 1989-12-13 | 李斌 | Multifunction alarm and monitoring centre system apparatus |
| CN2055621U (en) * | 1989-11-08 | 1990-04-04 | 张十庆 | Multifunction household warner |
| CN2094085U (en) * | 1991-06-05 | 1992-01-22 | 李栋鑫 | Microminiature fire alarm |
| CN202512706U (en) * | 2012-03-02 | 2012-10-31 | 成都掌握移动信息技术有限公司 | Gas leak alarm |
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2012
- 2012-10-13 CN CN201210386397.3A patent/CN103729970A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049384U (en) * | 1988-12-27 | 1989-12-13 | 李斌 | Multifunction alarm and monitoring centre system apparatus |
| CN2055621U (en) * | 1989-11-08 | 1990-04-04 | 张十庆 | Multifunction household warner |
| CN2094085U (en) * | 1991-06-05 | 1992-01-22 | 李栋鑫 | Microminiature fire alarm |
| CN202512706U (en) * | 2012-03-02 | 2012-10-31 | 成都掌握移动信息技术有限公司 | Gas leak alarm |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299371A (en) * | 2014-11-10 | 2015-01-21 | 周芸 | Combustible gas leakage audible and visual alarm |
| CN105758898A (en) * | 2016-04-15 | 2016-07-13 | 中国科学院过程工程研究所 | High-sensitivity self-feedback type alarm circuit for gas sensor |
| WO2017177983A1 (en) * | 2016-04-15 | 2017-10-19 | 中国科学院过程工程研究所 | Alarm circuit of gas-sensitive sensor |
| CN113358816A (en) * | 2021-04-21 | 2021-09-07 | 黄冈格罗夫氢能汽车有限公司 | Energy-saving hydrogen concentration alarm sensor and alarm method for hydrogen fuel automobile |
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Application publication date: 20140416 |