CN201126622Y - Multifunctional alarm - Google Patents
Multifunctional alarm Download PDFInfo
- Publication number
- CN201126622Y CN201126622Y CNU2007200990416U CN200720099041U CN201126622Y CN 201126622 Y CN201126622 Y CN 201126622Y CN U2007200990416 U CNU2007200990416 U CN U2007200990416U CN 200720099041 U CN200720099041 U CN 200720099041U CN 201126622 Y CN201126622 Y CN 201126622Y
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Abstract
The utility model relates to a multifunctional alarm for detecting harmful gases, characterized in that the alarm also comprises an alarm circuit provided within a shell, the alarm circuit also comprises a power source circuit, a gas detection circuit and an alarm clock alarm circuit; the utility model has the beneficial effects of simple circuit structure, low cost and easy manufacturing. Thus the utility model can be used for surveillance occasions such as houses and stores, and includes wide using value.
Description
Technical field
The utility model relates to a kind of warning device, particularly a kind of a kind of multifunction alarm device that harmful gas is detected.
Background technology
Family cooks and generally uses coal gas to replace coal dust ball stove in the past now, the life so the gas poisoning event frequency takes place frequently, in order to guarantee that present family uses the safety of coal gas, various toxic gas alarms have appearred on the market, but its description of warning device to harmful gas that use the existing market is a lot, but its circuit structure is complicated, cost is high, cost an arm and a leg and function singleness.
Summary of the invention
In view of the deficiency that prior art exists, the utility model provides a kind of multifunction alarm device.
The utility model for achieving the above object, the technical scheme of being taked is: a kind of multifunction alarm device, comprise casing, it is characterized in that, also comprise the alarm circuit that is provided with in the casing, described alarm circuit also comprises power circuit, Detection Circuit, little alarm watch circuit, described power circuit comprises power transformer T, commutation diode VD1-VD4, filter capacitor C1 and voltage stabilizing diode VD8, wherein commutation diode VD1-VD4 forms bridge rectifier circuit, T level of power transformer is connected with the ac input end of bridge rectifier circuit, the positive pole of the dc output end of bridge rectifier circuit is connected with resistance R 3 one ends, the dc output end negative pole of bridge rectifier circuit is connected with the other end of resistance R 3 through voltage stabilizing diode VD8, filter capacitor C1 is in parallel with the dc output end of bridge rectifier circuit, described Detection Circuit comprises gas sensor QM-N5, adjustable resistance RP1, RP2, diode VD5, capacitor C 2, resistance R 1, triode VT1, wherein capacitor C 2 is connected with power cathode with adjustable resistance RP1 one end in parallel, the other end respectively with diode VD5 negative pole, resistance R 1 one ends connect, diode VD5 is anodal to be connected with the gas sensor QM-N5B utmost point, another termination triode of hall resistance R1 VT1 base stage, the gas sensor C utmost point, the A utmost point connects positive source, the D utmost point connects power cathode through adjustable resistance RP2, described little alarm watch circuit comprises switch S, light emitting diode VD6, VD7, adjustable resistance R2 triode VT2, VT3, loudspeaker HA, adjustable resistance R2 wherein, a light emitting diode VD7 termination power positive pole in parallel, the other end respectively with triode VT1 emitter, triode VT2 base stage, light emitting diode VD6 negative pole connects, light emitting diode VD6 connects power cathode through switch S, triode VT2, triode VT3 forms compound transistor, triode VT3 emitter connects power cathode, and triode VT2 emitter connects positive source through loudspeaker HA.
The beneficial effects of the utility model are: this circuit has advantages such as circuit structure is simple, cost is low, easy making.Can be used for monitoring places such as family, shop, have use value widely.
Description of drawings
Fig. 1 is the utility model circuit connection diagram and as Figure of abstract.
Embodiment
A kind of as shown in Figure 1 multifunction alarm device, comprise casing, also comprise the alarm circuit that is provided with in the casing, alarm circuit also comprises power circuit, Detection Circuit, little alarm watch and warning circuit, power circuit comprises power transformer T, commutation diode VD1-VD4, filter capacitor C1 and voltage stabilizing diode VD8, wherein commutation diode VD1-VD4 forms bridge rectifier circuit, T level of power transformer is connected with the ac input end of bridge rectifier circuit, the positive pole of the dc output end of bridge rectifier circuit is connected with resistance R 3 one ends, the dc output end negative pole of bridge rectifier circuit is connected with the other end of resistance R 3 through voltage stabilizing diode VD8, filter capacitor C1 is in parallel with the dc output end of bridge rectifier circuit, Detection Circuit comprises gas sensor QM-N5, adjustable resistance RP1, RP2, diode VD5, capacitor C 2, resistance R 1, triode VT1, wherein capacitor C 2 is connected with power cathode with adjustable resistance RP1 one end in parallel, the other end respectively with diode VD5 negative pole, resistance R 1 one ends connect, diode VD5 is anodal to be connected with the gas sensor QM-N5B utmost point, resistance R 1 another termination triode VT1 base stage, the gas sensor C utmost point, the A utmost point connects positive source, the D utmost point connects power cathode through adjustable resistance RP2, little alarm watch warning circuit comprises switch S, light emitting diode VD6, VD7, adjustable resistance R2 triode VT2, VT3, loudspeaker HA, adjustable resistance R2 wherein, a light emitting diode VD7 termination power positive pole in parallel, the other end respectively with triode VT1 emitter, triode VT2 base stage, light emitting diode VD6 negative pole connects, light emitting diode VD6 connects power cathode through switch S, triode VT2, triode VT3 forms compound transistor, triode VT3 emitter connects power cathode, and triode VT2 emitter connects positive source through loudspeaker HA.
Principle of work is as follows:
1. the harmful gas alarm circuit course of work:
When not having harmful gas (carbon monoxide, coal gas, liquefied gas etc.) in the environment, its A and B two interpolar resistance are very big, so not conducting of diode VD5 all ends triode VT1, VT2 and VT3, sound and light alarm device is not worked.When harmful gas reaches certain concentration in detecting environment, resistance decreasing between gas sensor A and B the two poles of the earth, make the VD5 conducting, the delay circuit that device C2 and R1 form to delay time a period of time (prevention false alarm), time-delay VT1, VT2 and the equal conducting of VT3 later reported to the police audible-visual annunciator HA and multi-colour luminous diode VD7.
2. daybreak " little alarm watch " circuit working process:
Daytime, switch S was in off-state, and " little alarm watch " circuit is not worked, to the closure in evening.Behind the evening switch closure, photodiode VD6 does not receive light, and not conducting of VD6 at this moment all ends VT2, VT3, and acousto-optical device is not worked.The same day one is bright, the light that the acousto-optic diode receives, and photodiode VD6 internal resistance diminishes and conducting, makes the equal saturation conduction of triode VT2, VT3, and sound and light alarm device is luminous, pronunciation realizes " little alarm watch " function.
Claims (1)
1, a kind of multifunction alarm device, comprise casing, it is characterized in that, also comprise the alarm circuit that is provided with in the casing, described alarm circuit also comprises power circuit, Detection Circuit, little alarm watch circuit, described power circuit comprises power transformer T, commutation diode VD1-VD4, filter capacitor C1 and voltage stabilizing diode VD8, wherein commutation diode VD1-VD4 forms bridge rectifier circuit, T level of power transformer is connected with the ac input end of bridge rectifier circuit, the positive pole of the dc output end of bridge rectifier circuit is connected with resistance R 3 one ends, the dc output end negative pole of bridge rectifier circuit is connected with the other end of resistance R 3 through voltage stabilizing diode VD8, filter capacitor C1 is in parallel with the dc output end of bridge rectifier circuit, described Detection Circuit comprises gas sensor QM-N5, adjustable resistance RP1, RP2, diode VD5, capacitor C 2, resistance R 1, triode VT1, wherein capacitor C 2 is connected with power cathode with adjustable resistance RP1 one end in parallel, the other end respectively with diode VD5 negative pole, resistance R 1 one ends connect, diode VD5 is anodal to be connected with the gas sensor QM-N5B utmost point, another termination triode of hall resistance R1 VT1 base stage, the gas sensor C utmost point, the A utmost point connects positive source, the D utmost point connects power cathode through adjustable resistance RP2, described little alarm watch circuit comprises switch S, light emitting diode VD6, VD7, adjustable resistance R2 triode VT2, VT3, loudspeaker HA, adjustable resistance R2 wherein, a light emitting diode VD7 termination power positive pole in parallel, the other end respectively with triode VT1 emitter, triode VT2 base stage, light emitting diode VD6 negative pole connects, light emitting diode VD6 connects power cathode through switch S, triode VT2, triode VT3 forms compound transistor, triode VT3 emitter connects power cathode, and triode VT2 emitter connects positive source through loudspeaker HA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200990416U CN201126622Y (en) | 2007-12-19 | 2007-12-19 | Multifunctional alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200990416U CN201126622Y (en) | 2007-12-19 | 2007-12-19 | Multifunctional alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201126622Y true CN201126622Y (en) | 2008-10-01 |
Family
ID=40000089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200990416U Expired - Fee Related CN201126622Y (en) | 2007-12-19 | 2007-12-19 | Multifunctional alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201126622Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103544812A (en) * | 2012-07-12 | 2014-01-29 | 成都科盛石油科技有限公司 | Harmful gas leakage alarm suitable for petroleum refinery |
| CN103544813A (en) * | 2012-07-12 | 2014-01-29 | 成都科盛石油科技有限公司 | Self-inspection harmful gas leakage alarm suitable for petroleum refinery |
| CN103544798A (en) * | 2012-07-12 | 2014-01-29 | 成都科盛石油科技有限公司 | Antitheft self-check harmful gas leakage alarm suitable for petroleum refinery |
| CN104252768A (en) * | 2013-06-25 | 2014-12-31 | 成都旋极历通信息技术有限公司 | Harmful gas alarm device for airplane storage room |
| CN104299370A (en) * | 2014-10-28 | 2015-01-21 | 黄月华 | Audible and visual alarm device for poisonous and harmful combustible gas leakage |
-
2007
- 2007-12-19 CN CNU2007200990416U patent/CN201126622Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103544812A (en) * | 2012-07-12 | 2014-01-29 | 成都科盛石油科技有限公司 | Harmful gas leakage alarm suitable for petroleum refinery |
| CN103544813A (en) * | 2012-07-12 | 2014-01-29 | 成都科盛石油科技有限公司 | Self-inspection harmful gas leakage alarm suitable for petroleum refinery |
| CN103544798A (en) * | 2012-07-12 | 2014-01-29 | 成都科盛石油科技有限公司 | Antitheft self-check harmful gas leakage alarm suitable for petroleum refinery |
| CN104252768A (en) * | 2013-06-25 | 2014-12-31 | 成都旋极历通信息技术有限公司 | Harmful gas alarm device for airplane storage room |
| 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 | ||
| 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 |