CN204557711U - Fire-alarm - Google Patents
Fire-alarm Download PDFInfo
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- CN204557711U CN204557711U CN201520224149.8U CN201520224149U CN204557711U CN 204557711 U CN204557711 U CN 204557711U CN 201520224149 U CN201520224149 U CN 201520224149U CN 204557711 U CN204557711 U CN 204557711U
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Abstract
The utility model discloses a kind of fire-alarm, it comprises power circuit, Smoke Detection circuit and warning circuit, Smoke Detection circuit has infrared ray switch, warning circuit has monostalbe trigger, multivibrator, loudspeaker, in addition, the circuit of this alarm also comprises the electrical equipments such as diode, electric capacity, resistance, and one-piece construction is simple.Fire-alarm of the present utility model can be used for Smoke Detection and the warning in the such small-sized place of family and office.
Description
Technical field
The utility model relates to warning device technical field, is specifically related to a kind of fire-alarm.
Background technology
According to statistics, the frequency that family fire occurs is very high, and family, once breaking out of fire, is easy to occur putting out a fire to save life and property not in time, fire distinguisher lacks and people on the scene is panic, the unfavorable factor such as slow of escaping, and finally causes great life and property loss.In addition, the place that office, lodge etc. have freestanding enclosure space also also exists such problem, so Smoke Detection and warning device have important use in small-sized like this, independent place.Based on this, need to study a kind of Smoke Detection that is highly sensitive, that use in the place such as family and office and warning device, Smoke Detection and warning device are arranged on the most possible position comparatively early touching cigarette when fire occurs, event of fire, use this device disaster can be eliminated in bud, reduce unnecessary loss.
Utility model content
For problems of the prior art, the utility model provides a kind of fire-alarm, it comprises power circuit, Smoke Detection circuit and warning circuit, Smoke Detection circuit has infrared ray switch, warning circuit has monostalbe trigger, multivibrator, loudspeaker, the circuit of this alarm also comprises the electrical equipments such as diode, electric capacity, resistance, and one-piece construction is simple, can be used for Smoke Detection and the warning in the such small-sized place of family and office.
To achieve these goals, the utility model adopts following technical scheme.
A kind of fire-alarm, it comprises power circuit, Smoke Detection circuit and warning circuit, and power circuit is powered to circuit with+12V DC voltage, and Smoke Detection circuit comprises infrared ray switch, and warning circuit comprises monostalbe trigger and multivibrator; The fire-alarm that power circuit, Smoke Detection circuit, warning circuit are connected to form successively, for Smoke Detection and the warning of family and office space.
Preferably, described power circuit comprises voltage stabilizer, the first diode, the second diode, the first electric capacity, the second electric capacity, the first resistance, voltage stabilizer and the first diode, the second diode, the first electric capacity, the second electric capacity, the first resistance connect and compose step-down rectifier mu balanced circuit, 220V alternating voltage is carried out step-down and rectification, produces+12V DC voltage supply fire-alarm and use.
In above-mentioned arbitrary technical scheme preferably, described Smoke Detection circuit also comprises potentiometer, the second resistance, the 3rd resistance, the 3rd electric capacity.
In above-mentioned arbitrary technical scheme preferably, there is a light emitting diode and a transistor in described infrared ray switch.
In above-mentioned arbitrary technical scheme preferably, described second resistance is connected to the input end of infrared ray switch, and the electric current of light emitting diode in infrared ray switch is flow through in restriction; Potentiometer, the 3rd resistance, the 3rd electric capacity are connected to the output terminal of infrared ray switch, out gate voltage limit when potentiometer restriction is flow through the electric current of transistor in infrared ray switch and arranges transistor turns, and the 3rd resistance, the 3rd electric capacity form filtering circuit.
In above-mentioned arbitrary technical scheme preferably, described warning circuit also comprises triode, loudspeaker, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity.
In above-mentioned arbitrary technical scheme preferably, the collector of described 4th resistance and triode is connected to the second pin of monostalbe trigger, 5th resistance, the 4th electric capacity are connected to the 6th pin of monostalbe trigger, the three-prong of monostalbe trigger is connected with the 4th pin of multivibrator, 6th resistance and the 7th resistance are connected to the 7th pin of multivibrator, and the 8th electric capacity, loudspeaker and the 7th capacitances in series be three-prong and the 5th pin accessing multivibrator in parallel again.
In above-mentioned arbitrary technical scheme preferably, described infrared ray switch adopts H21A1 type infrared ray switch.
In above-mentioned arbitrary technical scheme preferably, described monostalbe trigger, multivibrator adopt NE555 type time-base integrated circuit.
In above-mentioned arbitrary technical scheme preferably, described voltage stabilizer adopts IN5738 type 12V stabilivolt.
In above-mentioned arbitrary technical scheme preferably, described loudspeaker adopts the 8 Ω loudspeakers of diameter 50mm.
In above-mentioned arbitrary technical scheme preferably, described first diode, the second diode adopt IN4001 type commutation diode.
Fire-alarm of the present utility model comprises power circuit, Smoke Detection circuit and warning circuit, power circuit is connected and composed by voltage stabilizer, diode, electric capacity, resistive element, power circuit is powered to circuit with+12V DC voltage, Smoke Detection circuit has infrared ray switch, and warning circuit has monostalbe trigger and multivibrator.This fire-alarm be connected to form successively with power circuit, Smoke Detection circuit, warning circuit of the present utility model, structure is simple, all have employed conventional electrical equipment, cost is low, can be used for Smoke Detection and warning that family, office, lodge etc. have the place of freestanding enclosure space.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the preferred embodiment according to fire-alarm of the present utility model;
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated, below describe only exemplarily and explain, any pro forma restriction is not done to the utility model.
As shown in Figure 1, fire-alarm comprises power circuit, Smoke Detection circuit and warning circuit, power circuit is powered to circuit with+12V DC voltage, Smoke Detection circuit comprises infrared ray switch I C1, warning circuit comprises monostalbe trigger IC2 and multivibrator IC3, the fire-alarm that power circuit, Smoke Detection circuit, warning circuit are connected to form successively, can be used for Smoke Detection and warning that family, office, lodge etc. have the place of freestanding enclosure space.
Further, power circuit comprises voltage stabilizer DW, the first diode D1, the second diode D2, the first electric capacity C1, the second electric capacity C2, the first resistance R1, voltage stabilizer DW and the first diode D1, the second diode D2, the first electric capacity C1, the second electric capacity C2, the first resistance R1 connect and compose step-down rectifier mu balanced circuit, 220V alternating voltage is carried out step-down and rectification, produces+12V DC voltage supply fire-alarm and use, Smoke Detection circuit also comprises potentiometer W, second resistance R2, 3rd resistance R3, 3rd electric capacity C3, there is in infrared ray switch I C1 a light emitting diode and a transistor, second resistance R2 is connected to the input end of infrared ray switch I C1, the electric current of light emitting diode in infrared ray switch I C1 is flow through in restriction, potentiometer W, 3rd resistance R3, 3rd electric capacity C3 is connected to the output terminal of infrared ray switch I C1, out gate voltage limit when potentiometer W restriction is flow through the electric current of transistor in infrared ray switch I C1 and arranges transistor turns, 3rd resistance R3, 3rd electric capacity C3 forms filtering circuit, warning circuit also comprises triode T, loudspeaker Y, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 4th electric capacity C4, 5th electric capacity C5, 6th electric capacity C6, 7th electric capacity C7, 8th electric capacity C8, the collector of the 4th resistance R4 and triode T is connected to second pin of monostalbe trigger IC2, 5th resistance R5, 4th electric capacity C4 is connected to the 6th pin of monostalbe trigger IC2, the three-prong of monostalbe trigger IC2 is connected with the 4th pin of multivibrator IC3, 6th resistance R6 and the 7th resistance R7 is connected to the 7th pin of multivibrator IC3, 8th electric capacity C8, loudspeaker Y and the 7th electric capacity C7 series connection is three-prong and the 5th pin accessing multivibrator IC3 in parallel again.
The selection of the component parameters of this fire-alarm is as follows: infrared ray switch I C1 can adopt H21A1 type infrared ray switch; Monostalbe trigger IC2, multivibrator IC3 can adopt NE555 type time-base integrated circuit; Voltage stabilizer DW can adopt IN5738 type 12V stabilivolt; Loudspeaker Y can adopt the 8 Ω loudspeakers of diameter 50mm; First diode D1, the second diode D2 can adopt IN4001 type commutation diode; First resistance R1 is 500k Ω, and the second resistance R2 is 1k Ω, and the 3rd resistance R3 is 1k Ω, and the 4th resistance R4 is 3.9k Ω, and the 5th resistance R5 is 1M Ω, and the 6th resistance R6 is 5.1k Ω, and the 7th resistance R7 is 100k Ω; First electric capacity C1 is 1 μ F/400V; Second electric capacity C2 is 220 μ F/16V; 3rd electric capacity C3 is 100 μ F; 4th electric capacity C4 is 470 μ F; 5th electric capacity C5 is 0.01 μ F; 6th electric capacity C6 is 0.01 μ F; 7th electric capacity C7 is 0.01 μ F; 8th electric capacity C8 is 100 μ F.
The power circuit of this fire-alarm is by voltage stabilizer, electric capacity, the elements such as resistance are formed, voltage stabilizer, electric capacity, the step-down rectifier mu balanced circuit that the elements such as resistance connect and compose produces+12V DC-voltage supply road and uses, the infrared ray switch that Smoke Detection circuit is scanned by a finedraw break-through and potentiometer, electric capacity, resistive element forms, infrared ray switch I C1 (H21A1) is an optical chopper in fact, second resistance R2 limits the electric current flowing through light emitting diode in infrared ray switch I C1, out gate voltage limit when potentiometer W is used to limit the electric current in the transistor flowing through infrared ray switch I C1 and arranges transistor turns, in infrared ray switch I C1, transistor is in conducting state under normal circumstances in non smoke, output low level, this output is through the 3rd resistance R3 and the 3rd electric capacity C3 filtering, be added to the base stage of triode T, therefore the base stage of triode T is electronegative potential.Triode T is phase inverter, due to non smoke under normal circumstances, the base stage of triode T is low level, so triode T ends, its collector exports as high level.The monostalbe trigger IC2 be made up of NE555, due to the input of its 2nd pin is high level, so the upset that can not be triggered, its 3rd pin exports as low level.The multivibrator IC3 be made up of NE555, due to the output of its 4th pin order steady state trigger IC2, is now low level, so multivibrator IC3 does not shake, and loudspeaker Y not sounding alarm.
When the infrared ray switch I C1 as sensor has detected smog, because smog has cut off the transmission approach of sensor mid-infrared light line, its internal transistor can not get enough light, so the resistance between the collector and emitter of the transistor of infrared ray switch I C1 inside raises, it is made to export as high level.Through the 3rd resistance R3 and the 3rd electric capacity C3 filtering, make the conducting of triode T positively biased, its collector exports as low level.At this moment the 2nd pin step-down current potential of monostalbe trigger IC2, monostalbe trigger IC2 is triggered, and its 3rd pin sends high level.Because the 4th pin of multivibrator IC3 is high level, multivibrator IC3 starts concussion, loudspeaker Y sounding alarm.Time of fire alarming depends on the time constant of monostable R5 and C4, that is: t=1.1R5 × C4=1.1 × 10
6× 470 × 10
-6=517S, about 8 minutes of time.
Claims (10)
1. a fire-alarm, is characterized in that: it comprises power circuit, Smoke Detection circuit and warning circuit; Described power circuit is powered to circuit with+12V DC voltage, and described Smoke Detection circuit comprises infrared ray switch (IC1), and described warning circuit comprises monostalbe trigger (IC2) and multivibrator (IC3); The fire-alarm that power circuit, Smoke Detection circuit, warning circuit are connected to form successively, for Smoke Detection and the warning of family and office space.
2. fire-alarm as claimed in claim 1, it is characterized in that: described power circuit comprises voltage stabilizer (DW), the first diode (D1), the second diode (D2), the first electric capacity (C1), the second electric capacity (C2), the first resistance (R1), voltage stabilizer (DW) and the first diode (D1), the second diode (D2), the first electric capacity (C1), the second electric capacity (C2), the first resistance (R1) connect and compose step-down rectifier mu balanced circuit, 220V alternating voltage is carried out step-down and rectification, produces+12V DC voltage supply fire-alarm and use.
3. fire-alarm as claimed in claim 1, is characterized in that: described Smoke Detection circuit also comprises potentiometer (W), the second resistance (R2), the 3rd resistance (R3), the 3rd electric capacity (C3).
4. fire-alarm as claimed in claim 1, is characterized in that: have a light emitting diode and a transistor in described infrared ray switch (IC1).
5. fire-alarm as claimed in claim 3, is characterized in that: described second resistance (R2) is connected to the input end of infrared ray switch (IC1), and the electric current of light emitting diode in infrared ray switch (IC1) is flow through in restriction; Potentiometer (W), the 3rd resistance (R3), the 3rd electric capacity (C3) are connected to the output terminal of infrared ray switch (IC1), out gate voltage limit when potentiometer (W) restriction is flow through the electric current of transistor in infrared ray switch (IC1) and arranges transistor turns, the 3rd resistance (R3), the 3rd electric capacity (C3) form filtering circuit.
6. fire-alarm as claimed in claim 1, is characterized in that: described warning circuit also comprises triode (T), loudspeaker (Y), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the 4th electric capacity (C4), the 5th electric capacity (C5), the 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8).
7. fire-alarm as claimed in claim 6, it is characterized in that: the collector of described 4th resistance (R4) and triode (T) is connected to the second pin of monostalbe trigger (IC2), 5th resistance (R5), 4th electric capacity (C4) is connected to the 6th pin of monostalbe trigger (IC2), the three-prong of monostalbe trigger (IC2) is connected with the 4th pin of multivibrator (IC3), 6th resistance (R6) and the 7th resistance (R7) are connected to the 7th pin of multivibrator (IC3), 8th electric capacity (C8), loudspeaker (Y) and the series connection of the 7th electric capacity (C7) be three-prong and the 5th pin accessing multivibrator (IC3) in parallel again.
8. fire-alarm as claimed in claim 1, is characterized in that: described infrared ray switch (IC1) adopts H21A1 type infrared ray switch.
9. fire-alarm as claimed in claim 1, is characterized in that: described monostalbe trigger (IC2), multivibrator (IC3) adopt NE555 type time-base integrated circuit.
10. fire-alarm as claimed in claim 2, is characterized in that: described voltage stabilizer (DW) adopts IN5738 type 12V stabilivolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520224149.8U CN204557711U (en) | 2015-04-14 | 2015-04-14 | Fire-alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520224149.8U CN204557711U (en) | 2015-04-14 | 2015-04-14 | Fire-alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204557711U true CN204557711U (en) | 2015-08-12 |
Family
ID=53832796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520224149.8U Expired - Fee Related CN204557711U (en) | 2015-04-14 | 2015-04-14 | Fire-alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204557711U (en) |
Cited By (1)
| 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 |
-
2015
- 2015-04-14 CN CN201520224149.8U patent/CN204557711U/en not_active Expired - Fee Related
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 |
| CN106097634B (en) * | 2016-08-28 | 2018-09-18 | 朱石明 | A kind of multifunctional fire-fighting alarm |
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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: 20150812 Termination date: 20180414 |