CN204904497U - Fire alarm circuit - Google Patents
Fire alarm circuit Download PDFInfo
- Publication number
- CN204904497U CN204904497U CN201520640577.9U CN201520640577U CN204904497U CN 204904497 U CN204904497 U CN 204904497U CN 201520640577 U CN201520640577 U CN 201520640577U CN 204904497 U CN204904497 U CN 204904497U
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- China
- Prior art keywords
- resistance
- electric capacity
- sensor
- rectifier bridge
- relay
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- Expired - Fee Related
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- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
Abstract
The utility model discloses a fire alarm circuit, including sensor U1, rectifier bridge T, resistance R5 and triode V1, electric capacity C2, resistance R4, sensor U1's foot 1, sensor U1's foot 2, diode D2's positive pole and relay J's contact J -1 are connected to electric capacity C1's one end connecting resistance R5 and 220V alternating current, electric capacity C1's other end connecting resistance R5's the other end and rectifier bridge T's port 1, 3 other ends of connecting the 220V alternating currents of rectifier bridge T's port, rectifier bridge T's port 2. The utility model discloses LED adjusts luminance, and desk lamp circuit structure is simple, components and parts are few, has smog and surveys and temperature detect dual mode conflagration detection mode to increased the system of discharging fume on original acousto -optic warning's basis, effectively reduced smog to people's harm, consequently have the function various, trigger advantage accurate and that the cost of manufacture is low.
Description
Technical field
The utility model relates to a kind of warning circuit, specifically a kind of fire alarm circuit.
Background technology
Security against fire is the most important thing of modern architecture security protection, especially the place of the easily breaking out of fire in the warehouse, workshop etc. of some storage combustible and explosive articles, fire protection warning device can be monitored in real time to guarded region, effectively can reduce casualties and property loss that fire causes, fire protection warning device is in the market varied, but usually only have single trigger element, and type of alarm mostly is sound and light alarm, function is comparatively single.
Utility model content
The purpose of this utility model is to provide a kind of saves energy, effective fire alarm circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of fire alarm circuit, comprises sensor U1, rectifier bridge T, resistance R5 and triode V1, one end contact resistance R5 of described electric capacity C1 and 220V alternating current, the other end of other end contact resistance R5 of electric capacity C1 and the port one of rectifier bridge T, the port 3 of rectifier bridge T connects the other end of 220V alternating current, and the port 2 of rectifier bridge T connects electric capacity C2, resistance R4, the pin 1 of sensor U1, the pin 2 of sensor U1, the pin 3 of the other end connecting sensor U1 of the anode of diode D2 and the contact J-1 of relay J, resistance R4, the pin 4 of sensor U1 and a stiff end of potentiometer RP1, the other end of electric capacity C2 connects electric capacity C3, resistance R3, relay J, the negative electrode of diode D1, loudspeaker B, blower fan M, another stiff end of potentiometer RP1 and the port 4 of rectifier bridge T, the negative electrode contact resistance R2 of diode D2, the sliding end of potentiometer RP1 connects the other end and the resistance R1 of electric capacity C3, the other end of other end contact resistance R3 of resistance R1 and the base stage of triode V1, the emitter of triode V1 connects the other end of relay J, the collector of the other end connecting triode V1 of resistance R2, the other end of the contact J-1 of relay J connects the anode of diode D1, the other end of blower fan M and the other end of loudspeaker B.
As preferred version of the present utility model: described resistance R4 is thermistor.
As preferred version of the present utility model: described relay is normally opened contact relay.
As preferred version of the present utility model: described sensor U1 is TGS308 type gas sensor.
As preferred version of the present utility model: described diode D1 is red light-emitting diode.
Compared with prior art, the beneficial effects of the utility model are: the utility model LED light-adjusting table-lamp circuit structure is simple, components and parts are few, there are smoke detection and temperature sensing two kinds of mode fire detection modes, and on the basis of original sound and light alarm, add smoke evacuation system, effective reduction smog, to the infringement of people, therefore has diverse in function, triggers accurate and that cost of manufacture is low advantage.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of fire alarm circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of fire alarm circuit, comprises sensor U1, rectifier bridge T, resistance R5 and triode V1, one end contact resistance R5 of described electric capacity C1 and 220V alternating current, the other end of other end contact resistance R5 of electric capacity C1 and the port one of rectifier bridge T, the port 3 of rectifier bridge T connects the other end of 220V alternating current, and the port 2 of rectifier bridge T connects electric capacity C2, resistance R4, the pin 1 of sensor U1, the pin 2 of sensor U1, the pin 3 of the other end connecting sensor U1 of the anode of diode D2 and the contact J-1 of relay J, resistance R4, the pin 4 of sensor U1 and a stiff end of potentiometer RP1, the other end of electric capacity C2 connects electric capacity C3, resistance R3, relay J, the negative electrode of diode D1, loudspeaker B, blower fan M, another stiff end of potentiometer RP1 and the port 4 of rectifier bridge T, the negative electrode contact resistance R2 of diode D2, the sliding end of potentiometer RP1 connects the other end and the resistance R1 of electric capacity C3, the other end of other end contact resistance R3 of resistance R1 and the base stage of triode V1, the emitter of triode V1 connects the other end of relay J, the collector of the other end connecting triode V1 of resistance R2, the other end of the contact J-1 of relay J connects the anode of diode D1, the other end of blower fan M and the other end of loudspeaker B.
Resistance R4 is thermistor.Relay is normally opened contact relay.Sensor U1 is TGS308 type gas sensor.Diode D1 is red light-emitting diode.
Principle of work of the present utility model is: 220V line voltage is through electric capacity C1 and resistance R1 step-down, circuit with stable DC voltage is given after rectifier bridge T rectification and electric capacity C1 filtering, thermistor R5 and gas sensor U1 can't detect temperature and all not conductings of smog trigger message under normal circumstances, triode V1 not conducting, relay J does not work, when running into fire condition generation, as long as thermistor R5 detects that temperature exceedes critical value or gas sensor U1 detects that smokescope exceeds critical value, its inner conductive rate will raise, the sampling voltage taked by potentiometer RP1 sliding end will be raised, thus the base stage of trigger triode V1, make its conducting, therefore relay J conducting adhesive, its normally opened contact J-1 closes, light emitting diode D1 and loudspeaker B is made to send sound and light alarm, blower fan M energising simultaneously starts smoke evacuation.
Claims (5)
1. a fire alarm circuit, comprises sensor U1, rectifier bridge T, resistance R5 and triode V1, it is characterized in that, one end contact resistance R5 of electric capacity C1 and 220V alternating current, the other end of other end contact resistance R5 of electric capacity C1 and the port one of rectifier bridge T, the port 3 of rectifier bridge T connects the other end of 220V alternating current, and the port 2 of rectifier bridge T connects electric capacity C2, resistance R4, the pin 1 of sensor U1, the pin 2 of sensor U1, the pin 3 of the other end connecting sensor U1 of the anode of diode D2 and the contact J-1 of relay J, resistance R4, the pin 4 of sensor U1 and a stiff end of potentiometer RP1, the other end of electric capacity C2 connects electric capacity C3, resistance R3, relay J, the negative electrode of diode D1, loudspeaker B, blower fan M, another stiff end of potentiometer RP1 and the port 4 of rectifier bridge T, the negative electrode contact resistance R2 of diode D2, the sliding end of potentiometer RP1 connects the other end and the resistance R1 of electric capacity C3, the other end of other end contact resistance R3 of resistance R1 and the base stage of triode V1, the emitter of triode V1 connects the other end of relay J, the collector of the other end connecting triode V1 of resistance R2, the other end of the contact J-1 of relay J connects the anode of diode D1, the other end of blower fan M and the other end of loudspeaker B.
2. a kind of fire alarm circuit according to claim 1, is characterized in that, described resistance R4 is thermistor.
3. a kind of fire alarm circuit according to claim 1, is characterized in that, described relay is normally opened contact relay.
4. a kind of fire alarm circuit according to claim 1, is characterized in that, described sensor U1 is TGS308 type gas sensor.
5. a kind of fire alarm circuit according to claim 1, is characterized in that, described diode D1 is red light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520640577.9U CN204904497U (en) | 2015-08-24 | 2015-08-24 | Fire alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520640577.9U CN204904497U (en) | 2015-08-24 | 2015-08-24 | Fire alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204904497U true CN204904497U (en) | 2015-12-23 |
Family
ID=54926658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520640577.9U Expired - Fee Related CN204904497U (en) | 2015-08-24 | 2015-08-24 | Fire alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204904497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106097634A (en) * | 2016-08-28 | 2016-11-09 | 朱石明 | A kind of multifunctional fire-fighting alarm |
| CN107507387A (en) * | 2017-09-30 | 2017-12-22 | 覃益祥 | A kind of fire alarm circuit |
-
2015
- 2015-08-24 CN CN201520640577.9U patent/CN204904497U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106097634A (en) * | 2016-08-28 | 2016-11-09 | 朱石明 | A kind of multifunctional fire-fighting alarm |
| CN106097634B (en) * | 2016-08-28 | 2018-09-18 | 朱石明 | A kind of multifunctional fire-fighting alarm |
| CN107507387A (en) * | 2017-09-30 | 2017-12-22 | 覃益祥 | A kind of fire alarm circuit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20160824 |