CN204313977U - Lampblack absorber flue fireproof alarming testing circuit - Google Patents
Lampblack absorber flue fireproof alarming testing circuit Download PDFInfo
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- CN204313977U CN204313977U CN201420777413.6U CN201420777413U CN204313977U CN 204313977 U CN204313977 U CN 204313977U CN 201420777413 U CN201420777413 U CN 201420777413U CN 204313977 U CN204313977 U CN 204313977U
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Abstract
The utility model discloses a kind of lampblack absorber flue fireproof alarming testing circuit, comprise the first resistance, the second resistance, triode, hummer, controller and thermistor, described controller, the second resistance are connected successively with the base stage of triode, the collector of described triode connects the negative pole of hummer, the positive pole of described hummer applies positive voltage, and described controller is used for providing drive singal to transistor base; Described thermistor connection control device, for providing temperature variation signal to controller, described first resistance one end applies positive voltage, and the other end connects thermistor.Thermistor of the present utility model can detect the change of oil smoke temperature, thus its resistance can change, thus triggers buzzer warning, and the oil smoke that reminding user enters lampblack absorber is overheated, and kitchen may have occurred fire.
Description
Technical field
The utility model relates to household electrical appliance technical field, particularly a kind of lampblack absorber flue fireproof alarming testing circuit.
Background technology
Lampblack absorber fireproof alarming function is seldom had in China's house and construct and design in prior art, once there be a family breaking out of fire, high-temperature flue gas is discharged in other men of resident family by public smoke evacuation rapidly, story height simultaneously, personnel mix, and resident family is unfamiliar with mutually, and contact inconvenience does not have again the habitation features of warning facility, also cause other resident families can not know the generation of fire in time, cause and injured by indirect fire damage and personnel.Along with the progress of society and urban construction develop rapidly, cities and towns living conditions and environmental requirement more and more higher, people are badly in need of a kind of flue fireproof alarming function, to meet the needs of people's life.
Utility model content
(1) technical matters that will solve
The purpose of this utility model will overcome above-mentioned shortcoming exactly, aims to provide a kind of lampblack absorber flue fireproof alarming testing circuit.
(2) technical scheme
For achieving the above object, lampblack absorber flue fireproof alarming testing circuit of the present utility model, comprise the first resistance, the second resistance, triode, hummer, controller and thermistor, described controller, the second resistance are connected successively with the base stage of triode, the collector of described triode connects the negative pole of hummer, the positive pole of described hummer applies positive voltage, and described controller is used for providing drive singal to transistor base; Described thermistor connection control device, for providing temperature variation signal to controller, described first resistance one end applies positive voltage, and the other end connects thermistor.
Further, filter capacitor is provided with between the other end of described first resistance and earth terminal.
Further, the capacitance of described filter capacitor is between 0.01 μ F ~ 0.1 μ F.
Further, described triode is NPN type triode.
(3) beneficial effect
Compared with prior art, the technical solution of the utility model has the following advantages: when the oil smoke entering lampblack absorber is overheated, thermistor of the present utility model can detect the change of oil smoke temperature, thus its resistance can change, thus trigger buzzer warning, the oil smoke that reminding user enters lampblack absorber is overheated, and kitchen may have occurred fire.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of lampblack absorber flue fireproof alarming testing circuit of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, lampblack absorber flue fireproof alarming testing circuit of the present utility model, comprises.
Comprise the first resistance R1, the second resistance R2, triode Q1, hummer BUZ, controller MCU and thermistor RT, described controller MCU, the second resistance R2 are connected successively with the base stage of triode Q1, the collector of described triode Q1 connects the negative pole of hummer BUZ, the positive pole of described hummer BUZ applies positive voltage VDD, and described controller MCU is used for providing drive singal to triode Q1 base stage; Described thermistor RT connection control device MCU, for providing temperature variation signal to controller Q1, described first resistance R1 one end applies positive voltage VDD, and the other end connects thermistor RT.The effect of above-mentioned first resistance R1 uses as pull-up resistor, and the second resistance R2 uses as divider resistance, and thermistor RT is for detecting the temperature variation in lampblack absorber flue.
Wherein, the process of controller MCU to signal belongs to prior art.
Filter capacitor C1 is provided with between the other end of described first resistance R1 and earth terminal; The electric capacity C1 value of described filter capacitor C1 is between 0.01 μ F ~ 0.1 μ F, its objective is and is filled into high frequency spurs.
Described triode Q1 is NPN type triode Q1, and Q1 is highly sensitive for this triode, is suitable as switching tube and uses.
When the system is operating, flue temperature raises, temperature sensor RT change in resistance; Temperature sensor RT change in resistance is by the first resistance R1 dividing potential drop, and electric capacity C1 filtering, causes voltage signal to change; Controller MCU receives the signal of change in voltage, and when magnitude of voltage reaches default value, controller MCU produces noble potential makes triode Q1 base potential raise by the second resistance R2, triode Q1 conducting, drive triode Q1, hummer BUZ is energized, and continues to send chimes of doom.
When flue temperature reduces, temperature sensor RT change in resistance; When the magnitude of voltage that controller MCU receives reaches default value, MCU sends electronegative potential makes triode Q1 end by resistance R2, and hummer BUZ power-off, hummer quits work.
The utility model provides flue fireproof alarming function, effectively prevent the generation of cooking fire.
In sum, above-mentioned embodiment is not restricted embodiment of the present utility model, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present utility model or equivalent deformation, all at technology category of the present utility model.
Claims (4)
1. a lampblack absorber flue fireproof alarming testing circuit, it is characterized in that: comprise the first resistance, the second resistance, triode, hummer, controller and thermistor, described controller, the second resistance are connected successively with the base stage of triode, the collector of described triode connects the negative pole of hummer, the positive pole of described hummer applies positive voltage, and described controller is used for providing drive singal to transistor base; Described thermistor connection control device, for providing temperature variation signal to controller, described first resistance one end applies positive voltage, and the other end connects thermistor.
2. lampblack absorber flue fireproof alarming testing circuit as claimed in claim 1, is characterized in that: be provided with filter capacitor between the other end of described first resistance and earth terminal.
3. lampblack absorber flue fireproof alarming testing circuit as claimed in claim 2, is characterized in that: the capacitance of described filter capacitor is between 0.01 μ F ~ 0.1 μ F.
4. lampblack absorber flue fireproof alarming testing circuit as claimed in claim 3, is characterized in that: described triode is npn type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420777413.6U CN204313977U (en) | 2014-12-10 | 2014-12-10 | Lampblack absorber flue fireproof alarming testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420777413.6U CN204313977U (en) | 2014-12-10 | 2014-12-10 | Lampblack absorber flue fireproof alarming testing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204313977U true CN204313977U (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420777413.6U Active CN204313977U (en) | 2014-12-10 | 2014-12-10 | Lampblack absorber flue fireproof alarming testing circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204313977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108216027A (en) * | 2018-01-17 | 2018-06-29 | 重庆交通大学 | Passenger opens the door and gets off anti-collision early warning system |
-
2014
- 2014-12-10 CN CN201420777413.6U patent/CN204313977U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108216027A (en) * | 2018-01-17 | 2018-06-29 | 重庆交通大学 | Passenger opens the door and gets off anti-collision early warning system |
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| GR01 | Patent grant |