CN204884005U - Alarm is driven to water - Google Patents
Alarm is driven to water Download PDFInfo
- Publication number
- CN204884005U CN204884005U CN201520498093.5U CN201520498093U CN204884005U CN 204884005 U CN204884005 U CN 204884005U CN 201520498093 U CN201520498093 U CN 201520498093U CN 204884005 U CN204884005 U CN 204884005U
- Authority
- CN
- China
- Prior art keywords
- npn triode
- connects
- triode
- resistance
- earth signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses an alarm is driven to water, including resistance R1, resistance R2, electric capacity C1, slide rheostat rw, NPN triode T1, NPN triode T2, PNP triode T3, buzzer F, temperature -sensing element rt, power VCC, earth signal GND, NPN triode T1's base is passed through slide rheostat rw and is connected earth signal GND, NPN triode T1's collecting electrode is still connected to NPN triode T1's base through temperature -sensing element rt, NPN triode T1's projecting pole passes through resistance R1 and connects earth signal GND, NPN triode T1's the collecting electrode VCC that connects, NPN triode T1's projecting pole passes through the base that resistance R2 connects NPN triode T2, earth signal GND is connected to NPN triode T2's projecting pole, the one end that electric capacity C1 connects buzzer F is passed through to NPN triode T2's base, earth signal GND is connected to buzzer F's the other end, PNP triode T3's base is connected to NPN triode T2's collecting electrode, buzzer F's one end is still connected to PNP triode T3's collecting electrode, PNP triode T3's the projecting pole VCC that connects, the utility model discloses simple structure, with low costs, job stabilization, long service life.
Description
Technical field
The utility model relates to alarm for boiling water.
Background technology
Existing alarm for boiling water complex structure, job insecurity, cost is high, and service time is of a specified duration, is easily burned, and brings inconvenience to the life of people.
Utility model content
The purpose of this utility model is the deficiency overcome in existing product, provides the driving circuit of the DC micromotor that a kind of structure is simple, cost is low, the 3V of working stability powers.
In order to achieve the above object, the utility model is achieved through the following technical solutions:
Alarm for boiling water of the present utility model, comprise resistance R1, resistance R2, electric capacity C1, slide rheostat Rw, NPN triode T1, NPN triode T2, PNP triode T3, hummer F, temperature-sensing element Rt, power supply VCC, earth signal GND, the base stage of NPN triode T1 connects earth signal GND by slide rheostat Rw, the base stage of NPN triode T1 also connects the collector of NPN triode T1 by temperature-sensing element Rt, the emitter of NPN triode T1 connects earth signal GND by resistance R1, the collector of NPN triode T1 connects power supply VCC, the emitter of NPN triode T1 connects the base stage of NPN triode T2 by resistance R2, the emitter of NPN triode T2 connects earth signal GND, the base stage of NPN triode T2 connects one end of hummer F by electric capacity C1, the other end of hummer F connects earth signal GND, the collector of NPN triode T2 connects the base stage of PNP triode T3, the collector of PNP triode T3 also connects one end of hummer F, the emitter of PNP triode T3 connects power supply VCC.
Temperature-sensing element Rt of the present utility model is 2AP type germanium diode Rt.
Slide rheostat Rw of the present utility model is 56K, and resistance R1 is 1K, and resistance R2 is 6.2K, and electric capacity C1 is 0.22uF.
Power supply VCC of the present utility model is 3V.
The beneficial effects of the utility model are as follows: the utility model structure is simple, cost is low, working stability, long service life.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with Figure of description, the technical solution of the utility model is described further:
As shown in Figure 1, alarm for boiling water of the present utility model, comprise resistance R1, resistance R2, electric capacity C1, slide rheostat Rw, NPN triode T1, NPN triode T2, PNP triode T3, hummer F, temperature-sensing element Rt, power supply VCC, earth signal GND, the base stage of NPN triode T1 connects earth signal GND by slide rheostat Rw, the base stage of NPN triode T1 also connects the collector of NPN triode T1 by temperature-sensing element Rt, the emitter of NPN triode T1 connects earth signal GND by resistance R1, the collector of NPN triode T1 connects power supply VCC, the emitter of NPN triode T1 connects the base stage of NPN triode T2 by resistance R2, the emitter of NPN triode T2 connects earth signal GND, the base stage of NPN triode T2 connects one end of hummer F by electric capacity C1, the other end of hummer F connects earth signal GND, the collector of NPN triode T2 connects the base stage of PNP triode T3, the collector of PNP triode T3 also connects one end of hummer F, the emitter of PNP triode T3 connects power supply VCC.
Temperature-sensing element Rt of the present utility model is 2AP type germanium diode Rt.
Slide rheostat Rw of the present utility model is 56K, and resistance R1 is 1K, and resistance R2 is 6.2K, and electric capacity C1 is 0.22uF.
Power supply VCC of the present utility model is 3V.
NPN triode T2, PNP triode T3, resistance R2 and electric capacity C1 etc. form audio frequency oscillator
Temperature-sensing element Rt is temperature-sensing element, is equivalent to the biasing resistor of NPN triode T1.Temperature-sensing element Rt belongs to reverse cut-off at ordinary times, and NPN triode T1 also ends; When the temperature increases, the back resistance of temperature-sensing element Rt diminishes, and leakage current increases, along with temperature be elevated to a certain degree time, NPN triode T1 obtains certain bias voltage and conducting, and audio frequency oscillator obtains electric work, loudspeaker sounding.
The utility model structure is simple, cost is low, working stability, long service life.
It should be noted that above what enumerate is only a kind of specific embodiment of the present utility model.Obviously, the utility model is not limited to above embodiment, can also have many distortion.In a word, all distortion that those of ordinary skill in the art can directly derive from content disclosed in the utility model or associate, all should think protection domain of the present utility model.
Claims (4)
1. alarm for boiling water, it is characterized in that, comprise resistance R1, resistance R2, electric capacity C1, slide rheostat Rw, NPN triode T1, NPN triode T2, PNP triode T3, hummer F, temperature-sensing element Rt, power supply VCC, earth signal GND, the base stage of described NPN triode T1 connects earth signal GND by slide rheostat Rw, the base stage of described NPN triode T1 also connects the collector of NPN triode T1 by temperature-sensing element Rt, the emitter of described NPN triode T1 connects earth signal GND by resistance R1, the collector of described NPN triode T1 connects power supply VCC, the emitter of described NPN triode T1 connects the base stage of NPN triode T2 by resistance R2, the emitter of described NPN triode T2 connects earth signal GND, the base stage of described NPN triode T2 connects one end of hummer F by electric capacity C1, the other end of described hummer F connects earth signal GND, the collector of described NPN triode T2 connects the base stage of PNP triode T3, the collector of described PNP triode T3 also connects one end of hummer F, the emitter of described PNP triode T3 connects power supply VCC.
2. alarm for boiling water according to claim 1, it is characterized in that, described temperature-sensing element Rt is 2AP type germanium diode Rt.
3. alarm for boiling water according to claim 1, it is characterized in that, described slide rheostat Rw is 56K, and described resistance R1 is 1K, and described resistance R2 is 6.2K, and described electric capacity C1 is 0.22uF.
4. alarm for boiling water according to claim 1, it is characterized in that, described power supply VCC is 3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520498093.5U CN204884005U (en) | 2015-06-30 | 2015-06-30 | Alarm is driven to water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520498093.5U CN204884005U (en) | 2015-06-30 | 2015-06-30 | Alarm is driven to water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204884005U true CN204884005U (en) | 2015-12-16 |
Family
ID=54828357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520498093.5U Expired - Fee Related CN204884005U (en) | 2015-06-30 | 2015-06-30 | Alarm is driven to water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204884005U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197709A (en) * | 2016-08-15 | 2016-12-07 | 成都众山科技有限公司 | A kind of can DTU broken string alarm temperature transmitter |
-
2015
- 2015-06-30 CN CN201520498093.5U patent/CN204884005U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197709A (en) * | 2016-08-15 | 2016-12-07 | 成都众山科技有限公司 | A kind of can DTU broken string alarm temperature transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hou Yiru Inventor before: Hou Yiru |
|
| COR | Change of bibliographic data | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Yutai County of Luancheng city of Shijiazhuang province Hebei 051430 Road No. 1 Hebei Experimental Middle School Patentee after: Hou Yiru Address before: Yutai County of Luancheng city of Shijiazhuang province Hebei 051430 Road No. 1 Hebei Experimental Middle School Patentee before: Hou Yiru |
|
| 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: 20151216 Termination date: 20160630 |