CN204557251U - A kind of temperature control circuit - Google Patents
A kind of temperature control circuit Download PDFInfo
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- CN204557251U CN204557251U CN201520304571.4U CN201520304571U CN204557251U CN 204557251 U CN204557251 U CN 204557251U CN 201520304571 U CN201520304571 U CN 201520304571U CN 204557251 U CN204557251 U CN 204557251U
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Abstract
The utility model discloses a kind of temperature control circuit, comprise rectifier bridge Q, load RL, diode D1, triode VT1, one-way SCR VS, chip U1 and thermistor VR1, load RL one end connects diode D1 positive pole and 220V alternating current one end respectively, diode D1 negative pole contact resistance R1, the resistance R1 other end respectively connecting triode VT1 collector, chip U1 pin 4, chip U1 pin 8, potentiometer RP1, diode D4 negative pole and electric capacity C3, the load RL other end connects electric capacity C1 and rectifier bridge Q pin 1 respectively.The utility model, by using chip NE555, can reach temperature controlled object more accurately, and circuit structure is simple, and cost is low, is applicable to very much promoting the use of.
Description
Technical field
The utility model relates to a kind of control circuit, specifically a kind of temperature control circuit.
Background technology
Along with the development of science and technology, temperature control circuit has been employed for a lot of fields in people's daily life, but, although temperature control circuit can be accomplished very simple, simple temperature control circuit can not accomplish accurate control mostly, under many circumstances, need the temperature control circuit accurately controlled mostly to adopt single-chip microcomputer to control, cost is higher, circuit structure is also comparatively complicated, greatly improves cost.
Utility model content
The purpose of this utility model is that providing a kind of controls the temperature control circuit accurate, cost is low, 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 temperature control circuit, comprises rectifier bridge Q, load RL, diode D1, triode VT1, one-way SCR VS, chip U1 and thermistor VR1, described load RL one end connects diode D1 positive pole and 220V alternating current one end respectively, diode D1 negative pole contact resistance R1, and the resistance R1 other end is connecting triode VT1 collector respectively, chip U1 pin 4, chip U1 pin 8, potentiometer RP1, diode D4 negative pole and electric capacity C3, the described load RL other end connects electric capacity C1 and rectifier bridge Q pin 1 respectively, electric capacity C1 other end contact resistance R2, the resistance R2 other end connects rectifier bridge Q pin 3 and the 220V alternating current other end respectively, and rectifier bridge Q pin 4 connects the K pole of one-way SCR VS respectively, triode VT2 emitter, resistance R5, electric capacity C2, chip U1 pin 1, thermistor VR2, diode D4 positive pole and the electric capacity C3 other end, described rectifier bridge Q pin 2 connects the A pole of one-way SCR VS respectively, diode D3 negative pole and resistance R3, the G pole of one-way SCR VS connects diode D2 negative pole, diode D2 positive pole connecting triode VT1 emitter, and triode VT1 base stage connects diode D3 positive pole respectively, triode VT2 collector and resistance R4, triode VT2 base stage is the contact resistance R3 other end and the resistance R5 other end respectively, the described resistance R4 other end connects chip U1 pin 3, chip U1 pin 5 and connects the electric capacity C2 other end, and chip U1 pin 6 connects respectively treats complete RP1 slide plate, the potentiometer RP1 other end and thermistor VR1, chip U1 pin 2 connects the thermistor VR1 other end and the thermistor VR2 other end respectively.
As further program of the utility model: described chip U1 model is NE555.
As the utility model further scheme: described diode D4 is voltage stabilizing diode.
Compared with prior art, the beneficial effects of the utility model are: the utility model, by using chip NE555, can reach temperature controlled object more accurately, and circuit structure is simple, and cost is low, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of temperature control 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 temperature control circuit, comprises rectifier bridge Q, load RL, diode D1, triode VT1, one-way SCR VS, chip U1 and thermistor VR1, load RL one end connects diode D1 positive pole and 220V alternating current one end respectively, diode D1 negative pole contact resistance R1, and the resistance R1 other end is connecting triode VT1 collector respectively, chip U1 pin 4, chip U1 pin 8, potentiometer RP1, diode D4 negative pole and electric capacity C3, the load RL other end connects electric capacity C1 and rectifier bridge Q pin 1 respectively, electric capacity C1 other end contact resistance R2, the resistance R2 other end connects rectifier bridge Q pin 3 and the 220V alternating current other end respectively, and rectifier bridge Q pin 4 connects the K pole of one-way SCR VS respectively, triode VT2 emitter, resistance R5, electric capacity C2, chip U1 pin 1, thermistor VR2, diode D4 positive pole and the electric capacity C3 other end, rectifier bridge Q pin 2 connects the A pole of one-way SCR VS respectively, diode D3 negative pole and resistance R3, the G pole of one-way SCR VS connects diode D2 negative pole, diode D2 positive pole connecting triode VT1 emitter, and triode VT1 base stage connects diode D3 positive pole respectively, triode VT2 collector and resistance R4, triode VT2 base stage is the contact resistance R3 other end and the resistance R5 other end respectively, the resistance R4 other end connects chip U1 pin 3, chip U1 pin 5 and connects the electric capacity C2 other end, and chip U1 pin 6 connects respectively treats complete RP1 slide plate, the potentiometer RP1 other end and thermistor VR1, chip U1 pin 2 connects the thermistor VR1 other end and the thermistor VR2 other end respectively.
Chip U1 model is NE555.
Diode D4 is voltage stabilizing diode.
Principle of work of the present utility model is: refer to Fig. 1, chip U1 is connected into bistable trigger-action circuit, when environment temperature increases, under thermistor VR1 and VR2 resistance become, make chip U1 pin 2 current potential drop to 1/3 threshold voltage, chip U1 set, chip U1 pin 3 is in high level, make the SCR AC zero-voltage-switch conducting of the composition such as rectifier bridge Q, one-way SCR VS and diode D2, load RL is energized work; When environment temperature declines, popular resistance RV1 and RV2 resistance become large, and make chip U1 pin 2 current potential higher than 1/3 threshold voltage, chip U1 resets, and makes SCR AC zero-voltage-switch ON-OFF, load RL dead electricity.
Claims (3)
1. a temperature control circuit, comprises rectifier bridge Q, load RL, diode D1, triode VT1, one-way SCR VS, chip U1 and thermistor VR1, is characterized in that, described load RL one end connects diode D1 positive pole and 220V alternating current one end respectively, diode D1 negative pole contact resistance R1, and the resistance R1 other end is connecting triode VT1 collector respectively, chip U1 pin 4, chip U1 pin 8, potentiometer RP1, diode D4 negative pole and electric capacity C3, the described load RL other end connects electric capacity C1 and rectifier bridge Q pin 1 respectively, electric capacity C1 other end contact resistance R2, the resistance R2 other end connects rectifier bridge Q pin 3 and the 220V alternating current other end respectively, and rectifier bridge Q pin 4 connects the K pole of one-way SCR VS respectively, triode VT2 emitter, resistance R5, electric capacity C2, chip U1 pin 1, thermistor VR2, diode D4 positive pole and the electric capacity C3 other end, described rectifier bridge Q pin 2 connects the A pole of one-way SCR VS respectively, diode D3 negative pole and resistance R3, the G pole of one-way SCR VS connects diode D2 negative pole, diode D2 positive pole connecting triode VT1 emitter, and triode VT1 base stage connects diode D3 positive pole respectively, triode VT2 collector and resistance R4, triode VT2 base stage is the contact resistance R3 other end and the resistance R5 other end respectively, the described resistance R4 other end connects chip U1 pin 3, chip U1 pin 5 and connects the electric capacity C2 other end, and chip U1 pin 6 connects respectively treats complete RP1 slide plate, the potentiometer RP1 other end and thermistor VR1, chip U1 pin 2 connects the thermistor VR1 other end and the thermistor VR2 other end respectively.
2. temperature control circuit according to claim 1, is characterized in that, described chip U1 model is NE555.
3. temperature control circuit according to claim 1, is characterized in that, described diode D4 is voltage stabilizing diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520304571.4U CN204557251U (en) | 2015-05-07 | 2015-05-07 | A kind of temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520304571.4U CN204557251U (en) | 2015-05-07 | 2015-05-07 | A kind of temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204557251U true CN204557251U (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520304571.4U Expired - Fee Related CN204557251U (en) | 2015-05-07 | 2015-05-07 | A kind of temperature control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204557251U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374361A (en) * | 2016-10-28 | 2017-02-01 | 桂林大创科技有限公司 | Intelligent electronic storage box |
| CN106595896A (en) * | 2016-11-28 | 2017-04-26 | 林桂清 | Carbon ceramic temperature sensor temperature monitoring control device |
| CN106768420A (en) * | 2016-11-28 | 2017-05-31 | 林桂清 | A kind of ceramic temperature sensor and its control device |
-
2015
- 2015-05-07 CN CN201520304571.4U patent/CN204557251U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374361A (en) * | 2016-10-28 | 2017-02-01 | 桂林大创科技有限公司 | Intelligent electronic storage box |
| CN106595896A (en) * | 2016-11-28 | 2017-04-26 | 林桂清 | Carbon ceramic temperature sensor temperature monitoring control device |
| CN106768420A (en) * | 2016-11-28 | 2017-05-31 | 林桂清 | A kind of ceramic temperature sensor and its control device |
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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 |
Granted publication date: 20150812 Termination date: 20160507 |
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| CF01 | Termination of patent right due to non-payment of annual fee |