CN204496312U - A kind of constant temperature oven control circuit - Google Patents
A kind of constant temperature oven control circuit Download PDFInfo
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- CN204496312U CN204496312U CN201520067592.9U CN201520067592U CN204496312U CN 204496312 U CN204496312 U CN 204496312U CN 201520067592 U CN201520067592 U CN 201520067592U CN 204496312 U CN204496312 U CN 204496312U
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Abstract
The utility model discloses a kind of constant temperature oven control circuit, comprise transformer T, rectifier bridge Q, thermistor RV, relay K 1, relay K 2 and potentiometer RP1.The utility model intelligent constant-temperature control circuit is by using relay K 1, K2 and thermistor RV, accurately can control the temperature of constant temperature oven, and can design temperature be changed by regulator potentiometer RP1 and RP2, structure is simple, function-stable, and owing to not using any chip component, volume is little, cost is low, and antijamming capability is strong, and stability is very high.
Description
Technical field
The utility model relates to a kind of control circuit, specifically a kind of constant temperature oven control circuit.
Background technology
Along with the development of electronic technology, high precision, easily temperature controller have become a new study hotspot, be with a wide range of applications and practical significance, a lot of temperature controls mostly to adopt single-chip microcomputer to be core controller now, this controller control accuracy is high, but steering logic is complicated, and cost is higher.
Utility model content
The purpose of this utility model is to provide the constant temperature oven control circuit that a kind of circuit structure is simple, 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 constant temperature oven control circuit, comprise transformer T, rectifier bridge Q, thermistor RV, relay K 1, relay K 2 and potentiometer RP1, described transformer T coil L2 one end connects 220V alternating current and relay K 1 contact K1-1 pin 3 respectively, the 220V alternating current other end is the connection transformer T coil L2 other end and relay K 2 contact K2-1 pin 3 respectively, relay K 2 contact K2-1 pin 1 connects heating wire RL and light emitting diode D3 negative pole respectively, light emitting diode D3 positive pole contact resistance R11, the resistance R11 other end connects the heating wire RL other end and relay K 1 contact K1-1 pin 1 respectively, relay K 1 contact K1-1 pin 2 contact resistance R12, resistance R12 other end connecting luminous diode D4 positive pole, light emitting diode D4 negative pole connects piezoelectric ceramic piece Y, the piezoelectric ceramic piece Y other end connects relay K 2 contact K2-1 pin 2, transformer T coil L1 two ends are connected respectively rectifier bridge Q pin 1 and pin 3, rectifier bridge Q pin 2 connects electric capacity C2 respectively, diode D2 positive pole, electric capacity C1, triode VT5 emitter, resistance R9, resistance R7, resistance R6 and resistance R1, rectifier bridge Q pin 4 connects the electric capacity C2 other end respectively, resistance R10 and triode VT4 collector, the resistance R10 other end is connecting triode VT4 base stage and diode D2 negative pole respectively, described triode VT4 emitter connects the electric capacity C1 other end respectively, diode D1 negative pole, relay K 2 coil, relay K 1 coil, thermistor RV, resistance R5, resistance R4, resistance R3 and potentiometer RP1, diode D1 positive pole connects the relay K 1 coil other end respectively, the relay K 2 coil other end and triode VT5 collector, triode VT5 base stage is the contact resistance R6 other end respectively, triode VT1 emitter and triode VT3 emitter, the described thermistor RV other end is the contact resistance R8 other end and the resistance R9 other end respectively, resistance R8 other end connecting triode VT3 base stage, triode VT3 collector is the contact resistance R5 other end and triode VT2 emitter respectively, the triode VT2 collector contact resistance R7 other end, triode VT2 base stage is connecting triode VT1 collector and the resistance R4 other end respectively, triode VT1 base stage contact resistance R2, the resistance R2 other end is the contact resistance R1 other end and potentiometer RP2 respectively, the potentiometer RP2 other end connects potentiometer RP2 slide plate respectively, the resistance R3 other end, the potentiometer RP1 other end and potentiometer RP1 slide plate.
Compared with prior art, the beneficial effects of the utility model are: the utility model intelligent constant-temperature control circuit is by using relay K 1, K2 and thermistor RV, accurately can control the temperature of constant temperature oven, and can change design temperature by regulator potentiometer RP1 and RP2, structure is simple, function-stable, and owing to not using any chip component, volume is little, and cost is low, antijamming capability is strong, and stability is very high.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of constant temperature oven 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 constant temperature oven control circuit, comprise transformer T, rectifier bridge Q, thermistor RV, relay K 1, relay K 2 and potentiometer RP1, transformer T coil L2 one end connects 220V alternating current and relay K 1 contact K1-1 pin 3 respectively, the 220V alternating current other end is the connection transformer T coil L2 other end and relay K 2 contact K2-1 pin 3 respectively, relay K 2 contact K2-1 pin 1 connects heating wire RL and light emitting diode D3 negative pole respectively, light emitting diode D3 positive pole contact resistance R11, the resistance R11 other end connects the heating wire RL other end and relay K 1 contact K1-1 pin 1 respectively, relay K 1 contact K1-1 pin 2 contact resistance R12, resistance R12 other end connecting luminous diode D4 positive pole, light emitting diode D4 negative pole connects piezoelectric ceramic piece Y, the piezoelectric ceramic piece Y other end connects relay K 2 contact K2-1 pin 2, transformer T coil L1 two ends are connected respectively rectifier bridge Q pin 1 and pin 3, rectifier bridge Q pin 2 connects electric capacity C2 respectively, diode D2 positive pole, electric capacity C1, triode VT5 emitter, resistance R9, resistance R7, resistance R6 and resistance R1, rectifier bridge Q pin 4 connects the electric capacity C2 other end respectively, resistance R10 and triode VT4 collector, the resistance R10 other end is connecting triode VT4 base stage and diode D2 negative pole respectively, triode VT4 emitter connects the electric capacity C1 other end respectively, diode D1 negative pole, relay K 2 coil, relay K 1 coil, thermistor RV, resistance R5, resistance R4, resistance R3 and potentiometer RP1, diode D1 positive pole connects the relay K 1 coil other end respectively, the relay K 2 coil other end and triode VT5 collector, triode VT5 base stage is the contact resistance R6 other end respectively, triode VT1 emitter and triode VT3 emitter, the thermistor RV other end is the contact resistance R8 other end and the resistance R9 other end respectively, resistance R8 other end connecting triode VT3 base stage, triode VT3 collector is the contact resistance R5 other end and triode VT2 emitter respectively, the triode VT2 collector contact resistance R7 other end, triode VT2 base stage is connecting triode VT1 collector and the resistance R4 other end respectively, triode VT1 base stage contact resistance R2, the resistance R2 other end is the contact resistance R1 other end and potentiometer RP2 respectively, the potentiometer RP2 other end connects potentiometer RP2 slide plate respectively, the resistance R3 other end, the potentiometer RP1 other end and potentiometer RP1 slide plate.
Principle of work of the present utility model is: prime is by triode VT1, triode VT3 and potentiometer RP1 etc. form differential amplifier, the signal that thermistor RV sends here is amplified, wherein, potentiometer RP1, RP2 is for regulating temperature controlling range, triode VT2 and VT4 form rear two sew direct current amplifier prime differential amplification is clamored the temperature control signals that exports is amplified to can pilot relay K1, the work of K2, whether electrically connected with city by Control heating wire RL again, reach temperature automatically controlled object, adopt light emitting diode D3, D4 indicates heat temperature raising respectively and cools state, at cooling alarm, 220V alternating current is through transformer T step-down, rectifier bridge Q rectification exports 9V ~ 12V DC voltage, 6v stabilized voltage supply needed for temperature control circuit is exported from triode VT4 emitter again through single-stage serial regulating circuit, this stabilized voltage supply is when load current 200mA, pressure drop is less than 0.2V, can ensure the precision of temperature control circuit.
Claims (1)
1. a constant temperature oven control circuit, comprise transformer T, rectifier bridge Q, thermistor RV, relay K 1, relay K 2 and potentiometer RP1, it is characterized in that, described transformer T coil L2 one end connects 220V alternating current and relay K 1 contact K1-1 pin 3 respectively, the 220V alternating current other end is the connection transformer T coil L2 other end and relay K 2 contact K2-1 pin 3 respectively, relay K 2 contact K2-1 pin 1 connects heating wire RL and light emitting diode D3 negative pole respectively, light emitting diode D3 positive pole contact resistance R11, the resistance R11 other end connects the heating wire RL other end and relay K 1 contact K1-1 pin 1 respectively, relay K 1 contact K1-1 pin 2 contact resistance R12, resistance R12 other end connecting luminous diode D4 positive pole, light emitting diode D4 negative pole connects piezoelectric ceramic piece Y, the piezoelectric ceramic piece Y other end connects relay K 2 contact K2-1 pin 2, transformer T coil L1 two ends are connected respectively rectifier bridge Q pin 1 and pin 3, rectifier bridge Q pin 2 connects electric capacity C2 respectively, diode D2 positive pole, electric capacity C1, triode VT5 emitter, resistance R9, resistance R7, resistance R6 and resistance R1, rectifier bridge Q pin 4 connects the electric capacity C2 other end respectively, resistance R10 and triode VT4 collector, the resistance R10 other end is connecting triode VT4 base stage and diode D2 negative pole respectively, described triode VT4 emitter connects the electric capacity C1 other end respectively, diode D1 negative pole, relay K 2 coil, relay K 1 coil, thermistor RV, resistance R5, resistance R4, resistance R3 and potentiometer RP1, diode D1 positive pole connects the relay K 1 coil other end respectively, the relay K 2 coil other end and triode VT5 collector, triode VT5 base stage is the contact resistance R6 other end respectively, triode VT1 emitter and triode VT3 emitter, the described thermistor RV other end is the contact resistance R8 other end and the resistance R9 other end respectively, resistance R8 other end connecting triode VT3 base stage, triode VT3 collector is the contact resistance R5 other end and triode VT2 emitter respectively, the triode VT2 collector contact resistance R7 other end, triode VT2 base stage is connecting triode VT1 collector and the resistance R4 other end respectively, triode VT1 base stage contact resistance R2, the resistance R2 other end is the contact resistance R1 other end and potentiometer RP2 respectively, the potentiometer RP2 other end connects potentiometer RP2 slide plate respectively, the resistance R3 other end, the potentiometer RP1 other end and potentiometer RP1 slide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520067592.9U CN204496312U (en) | 2015-01-31 | 2015-01-31 | A kind of constant temperature oven control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520067592.9U CN204496312U (en) | 2015-01-31 | 2015-01-31 | A kind of constant temperature oven control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204496312U true CN204496312U (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520067592.9U Expired - Fee Related CN204496312U (en) | 2015-01-31 | 2015-01-31 | A kind of constant temperature oven control circuit |
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| Country | Link |
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| CN (1) | CN204496312U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106550496A (en) * | 2016-12-14 | 2017-03-29 | 苏晓玲 | A kind of Graphene heats desktop control circuit |
| WO2017152376A1 (en) * | 2016-03-08 | 2017-09-14 | 张舒维 | Aquarium constant temperature regulating system based on online monitoring technology |
-
2015
- 2015-01-31 CN CN201520067592.9U patent/CN204496312U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017152376A1 (en) * | 2016-03-08 | 2017-09-14 | 张舒维 | Aquarium constant temperature regulating system based on online monitoring technology |
| CN106550496A (en) * | 2016-12-14 | 2017-03-29 | 苏晓玲 | A kind of Graphene heats desktop control 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 |
Granted publication date: 20150722 Termination date: 20160131 |
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| CF01 | Termination of patent right due to non-payment of annual fee |