CN204695136U - A kind of temperature control circuit - Google Patents
A kind of temperature control circuit Download PDFInfo
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- CN204695136U CN204695136U CN201520437612.7U CN201520437612U CN204695136U CN 204695136 U CN204695136 U CN 204695136U CN 201520437612 U CN201520437612 U CN 201520437612U CN 204695136 U CN204695136 U CN 204695136U
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- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of temperature control circuit, comprise resistance R1, resistance R2, potentiometer RP1, chip IC 1 and solid-state relay S, one end contact resistance R5, the resistance R11 of described resistance R1, a stiff end of potentiometer RP2 and power supply VCC, the other end contact resistance R2 of resistance R1 and the pin 1 of chip IC 1, the pin 4 of another stiff end of the pin 3 contact resistance R4 of chip IC 1, resistance R7, resistance R9, potentiometer RP1, voltage table P and chip IC 1.The utility model temperature control circuit has abandoned the design of traditional thermistor and temperature sensor, adopt diode as temperature control original paper, the principle utilizing its forward voltage drop linearly to reduce with the rising of temperature is made, because this simplify circuit structure, decreasing cost of manufacture, comparatively accurate temperature can not only be realized control, also carry out temperature just by voltage table, therefore have that structure is simple, cost of manufacture is low, the advantage of stable performance and diverse in function.
Description
Technical field
The utility model relates to a kind of control circuit, the temperature control circuit that specifically a kind of cost is low, precision is high.
Background technology
Temperature regulating device common in daily life during temperature control circuit, also extremely important status is occupied in the industrial production, traditional temperature control circuit many uses thermistor or temperature sensor are as temperature control element, the precision of thermistor is lower, the thermometer precision produced is low, require that high place is inapplicable, and the precision of temperature sensor is very high at some to temperature accuracy, but price is high, add cost of manufacture.
Utility model content
The purpose of this utility model is to provide the temperature control circuit that a kind of structure is simple, cost of manufacture 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, comprise resistance R1, resistance R2, potentiometer RP1, chip IC 1 and solid-state relay S, one end contact resistance R5 of described resistance R1, resistance R11, a stiff end of potentiometer RP2 and power supply VCC, the other end contact resistance R2 of resistance R1 and the pin 1 of chip IC 1, the pin 3 contact resistance R4 of chip IC 1, resistance R7, resistance R9, another stiff end of potentiometer RP1, the pin 4 of voltage table P and chip IC 1, the other end ground connection of resistance R2, the sliding end of potentiometer RP1 connects the pin 1 of chip IC 2, the other end of pin 3 contact resistance R4 of chip IC 2 and the negative electrode of diode D1, the pin 4 contact resistance R6 of chip IC 2 and the anode of diode D1, the pin 4 contact resistance R6 of chip IC 2 and the anode of diode D1, the other end contact resistance R8 of resistance R6 and the pin 3 of chip IC 4, the other end of other end contact resistance R7 of resistance R5 and the pin 1 of chip IC 4, the other end of resistance R8 connects a stiff end of potentiometer RP3, the pin 4 of chip IC 3 and the pin 4 of chip IC 4, the pin 1 of chip IC 3 connects the sliding end of potentiometer RP2, another stiff end ground connection of potentiometer RP2, the pin 5 contact resistance R10 of chip IC 3, the base stage of the other end connecting triode V1 of resistance R10, the sliding end of potentiometer RP3 connects the other end of voltage table P, the other end of another stiff end contact resistance R9 of potentiometer RP3, the other end of collector contact resistance R11 of triode V1 and the pin 1 of solid-state relay S, the emitter of the pin 2 connecting triode V1 of solid-state relay S ground connection, the pin 3 of solid-state relay S connects electrothermal tube A, the other end of electrothermal tube A connects 220V alternating current, the pin 4 of solid-state relay S connects the other end of 220V alternating current.
As preferred version of the present utility model: described power supply VCC is 5V direct current.
As preferred version of the present utility model: the model of described chip IC 1, chip IC 2, chip IC 3 and chip IC 4 is LM321.
Compared with prior art, the beneficial effects of the utility model are: the utility model temperature control circuit has abandoned the design of traditional thermistor and temperature sensor, adopt diode as temperature control original paper, the principle utilizing its forward voltage drop linearly to reduce with the rising of temperature is made, because this simplify circuit structure, decreasing cost of manufacture, comparatively accurate temperature can not only be realized control, also carry out temperature just by voltage table, therefore have that structure is simple, cost of manufacture is low, the advantage of stable performance and diverse in function.
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, a kind of temperature control circuit, comprise resistance R1, resistance R2, potentiometer RP1, chip IC 1 and solid-state relay S, one end contact resistance R5 of described resistance R1, resistance R11, a stiff end of potentiometer RP2 and power supply VCC, the other end contact resistance R2 of resistance R1 and the pin 1 of chip IC 1, the pin 3 contact resistance R4 of chip IC 1, resistance R7, resistance R9, another stiff end of potentiometer RP1, the pin 4 of voltage table P and chip IC 1, the other end ground connection of resistance R2, the sliding end of potentiometer RP1 connects the pin 1 of chip IC 2, the other end of pin 3 contact resistance R4 of chip IC 2 and the negative electrode of diode D1, the pin 4 contact resistance R6 of chip IC 2 and the anode of diode D1, the pin 4 contact resistance R6 of chip IC 2 and the anode of diode D1, the other end contact resistance R8 of resistance R6 and the pin 3 of chip IC 4, the other end of other end contact resistance R7 of resistance R5 and the pin 1 of chip IC 4, the other end of resistance R8 connects a stiff end of potentiometer RP3, the pin 4 of chip IC 3 and the pin 4 of chip IC 4, the pin 1 of chip IC 3 connects the sliding end of potentiometer RP2, another stiff end ground connection of potentiometer RP2, the pin 5 contact resistance R10 of chip IC 3, the base stage of the other end connecting triode V1 of resistance R10, the sliding end of potentiometer RP3 connects the other end of voltage table P, the other end of another stiff end contact resistance R9 of potentiometer RP3, the other end of collector contact resistance R11 of triode V1 and the pin 1 of solid-state relay S, the emitter of the pin 2 connecting triode V1 of solid-state relay S ground connection, the pin 3 of solid-state relay S connects electrothermal tube A, the other end of electrothermal tube A connects 220V alternating current, the pin 4 of solid-state relay S connects the other end of 220V alternating current.
Described power supply VCC is 5V direct current.The model of described chip IC 1, chip IC 2, chip IC 3 and chip IC 4 is LM321.
Principle of work of the present utility model is: any one common diode, can as the sensing element of an electronic thermometer that is excellent, that have certain precision, and diode is when temperature often raises 1 degree, and its forward voltage drop will reduce 2mV.In circuit, a constant reference voltage is added in the pin 1 of chip IC 2, pin 2 access diode D1 and resistance R4 of chip IC 2.The electric current flowing through diode D1 also flows through resistance R4 simultaneously, therefore on resistance R4, maintains constant pressure drop.Like this when IC2 output end voltage changes, it may be only cause because of temperature variation caused by the change of diode D1 forward voltage drop, and namely the change of IC2 output voltage is proportional to the temperature variation of diode D1.The reference voltage source VCC of IC2 provides.The output voltage of IC2 amplifies through IC4 again.IC4 with IC2 is identical, and its 1 pin also keeps constant level.The selection of resistance R4 and resistance R7 resistance should make the 0V of voltage table P correspond to environment temperature 0 degree, makes to make thermometer can measure more than 0 degree and following temperature.Power supply VCC provides the reference voltage of quite stable to IC2 and IC4.Chip IC 1 produces the voltage an of+2.5V together with resistance R1, resistance R2, and the power lead of this+2.5V is just as " ground wire " of temperature control circuit.Temperature under normal circumstances, the output terminal of chip IC 3 is high level, triode V1 is in conducting state, solid-state relay S inside not conducting, when temperature is lower than design temperature, the signal that chip IC 2 exports is added in 4 pin of chip IC 3 by chip IC 4, chip IC 4 exports and becomes low level, then triode V1 ends, and the inner conducting of solid-state relay, electrothermal tube A energising starts heating.
Claims (3)
1. a temperature control circuit, comprises resistance R1, resistance R2, potentiometer RP1, chip IC 1 and solid-state relay S, it is characterized in that, one end contact resistance R5 of described resistance R1, resistance R11, a stiff end of potentiometer RP2 and power supply VCC, the other end contact resistance R2 of resistance R1 and the pin 1 of chip IC 1, the pin 3 contact resistance R4 of chip IC 1, resistance R7, resistance R9, another stiff end of potentiometer RP1, the pin 4 of voltage table P and chip IC 1, the other end ground connection of resistance R2, the sliding end of potentiometer RP1 connects the pin 1 of chip IC 2, the other end of pin 3 contact resistance R4 of chip IC 2 and the negative electrode of diode D1, the pin 4 contact resistance R6 of chip IC 2 and the anode of diode D1, the pin 4 contact resistance R6 of chip IC 2 and the anode of diode D1, the other end contact resistance R8 of resistance R6 and the pin 3 of chip IC 4, the other end of other end contact resistance R7 of resistance R5 and the pin 1 of chip IC 4, the other end of resistance R8 connects a stiff end of potentiometer RP3, the pin 4 of chip IC 3 and the pin 4 of chip IC 4, the pin 1 of chip IC 3 connects the sliding end of potentiometer RP2, another stiff end ground connection of potentiometer RP2, the pin 5 contact resistance R10 of chip IC 3, the base stage of the other end connecting triode V1 of resistance R10, the sliding end of potentiometer RP3 connects the other end of voltage table P, the other end of another stiff end contact resistance R9 of potentiometer RP3, the other end of collector contact resistance R11 of triode V1 and the pin 1 of solid-state relay S, the emitter of the pin 2 connecting triode V1 of solid-state relay S ground connection, the pin 3 of solid-state relay S connects electrothermal tube A, the other end of electrothermal tube A connects 220V alternating current, the pin 4 of solid-state relay S connects the other end of 220V alternating current.
2. a kind of temperature control circuit according to claim 1, is characterized in that, described power supply VCC is 5V direct current.
3. a kind of temperature control circuit according to claim 1, is characterized in that, the model of described chip IC 1, chip IC 2, chip IC 3 and chip IC 4 is LM321.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520437612.7U CN204695136U (en) | 2015-06-22 | 2015-06-22 | A kind of temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520437612.7U CN204695136U (en) | 2015-06-22 | 2015-06-22 | A kind of temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204695136U true CN204695136U (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520437612.7U Expired - Fee Related CN204695136U (en) | 2015-06-22 | 2015-06-22 | A kind of temperature control circuit |
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| Country | Link |
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| CN (1) | CN204695136U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949898A (en) * | 2016-01-07 | 2017-07-14 | 天津普正动力科技有限公司 | A kind of intelligent vehicle-carrying navigation system |
| CN107329508A (en) * | 2017-07-14 | 2017-11-07 | 过成康 | A kind of low energy consumption, high-precision automatic temperature control circuit |
| CN108147602A (en) * | 2017-12-11 | 2018-06-12 | 李童 | It is a kind of that there is the water purifier of intelligent temperature control |
-
2015
- 2015-06-22 CN CN201520437612.7U patent/CN204695136U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949898A (en) * | 2016-01-07 | 2017-07-14 | 天津普正动力科技有限公司 | A kind of intelligent vehicle-carrying navigation system |
| CN107329508A (en) * | 2017-07-14 | 2017-11-07 | 过成康 | A kind of low energy consumption, high-precision automatic temperature control circuit |
| CN108147602A (en) * | 2017-12-11 | 2018-06-12 | 李童 | It is a kind of that there is the water purifier of intelligent temperature control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160122 Address after: 510000 6, Dalang village, Shijing street, Baiyun District, Guangdong, Guangzhou, China Patentee after: Guangzhou Aili refrigeration equipment Co., Ltd. Address before: 315700 Xiangshan County, Zhejiang City, the town of Ding Ding Ding Road Patentee before: Qian Lingke |
|
| 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: 20151007 Termination date: 20170622 |