CN202600524U - Temperature control circuit - Google Patents
Temperature control circuit Download PDFInfo
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- CN202600524U CN202600524U CN 201220090498 CN201220090498U CN202600524U CN 202600524 U CN202600524 U CN 202600524U CN 201220090498 CN201220090498 CN 201220090498 CN 201220090498 U CN201220090498 U CN 201220090498U CN 202600524 U CN202600524 U CN 202600524U
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- temperature
- temperature detecting
- control circuit
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Abstract
The utility model relates to a temperature control circuit which comprises a temperature detecting unit, a comparing unit, a photoelectric coupling unit, and a refrigerating unit, wherein the temperature detecting unit, the comparing unit, the photoelectric coupling unit, and the refrigerating unit are sequentially connected. The temperature control circuit is characterized in that the comparing unit is a three-terminal voltage regulator tube, an output end of the temperature detecting unit is connected with a reference end of the three-terminal voltage regulator tube, a positive electrode end of the three-terminal voltage regulator tube is grounded, a negative electrode end is connected with an input end of the photoelectric coupling unit, the three-terminal voltage regulator tube controls the photoelectric coupling unit to generate corresponding control signals according to temperature signals fed back by the temperature detecting unit, and the refrigerating unit is enabled to adjust the refrigerating power according to the control signals. The temperature control circuit has the advantage that the comparing unit is a three-terminal voltage regulator tube, which, compared with the prior art, can reduce the circuit cost greatly and simplify the circuit structure.
Description
Technical field:
The utility model relates to a kind of temperature control circuit.
Background technology:
As shown in Figure 1; Existing temperature control circuit; Comprise the temperature detecting unit, comparing unit, photoelectricity coupling unit and the refrigeration unit that connect successively, said comparing unit is an operational amplifier, and its inverting input is connected with temperature detecting unit; Its in-phase input end is connected between the resistance R a and resistance R b of mutual serial connection; Its output terminal is connected with the photoelectricity coupling unit through resistance R _ f, and produces control signal corresponding according to the temperature signal control photoelectricity coupling unit of temperature detecting unit feedback, makes refrigeration unit regulate its refrigeration work consumption according to control signal.Its groundwork principle is following: when temperature descends; The resistance of said temperature detecting unit raises; The inverting input voltage of operational amplifier is raise, thereby the output end voltage of operational amplifier is descended, the input end electric current of photoelectricity coupling unit is increased; Make the output terminal of photoelectricity coupling unit produce corresponding control signal, make refrigeration unit regulate its refrigeration work consumption according to control signal.But there is following defective in the temperature control circuit of this structure: comparing unit is an operational amplifier, and circuit cost is high, the circuit structure relative complex.
Summary of the invention:
The purpose of the utility model is to provide a kind of temperature control circuit simple in structure, lower-cost.
A kind of temperature control circuit; Comprise the temperature detecting unit, comparing unit, photoelectricity coupling unit and the refrigeration unit that connect successively; It is characterized in that: said comparing unit is the three-terminal voltage-stabilizing pipe; The output terminal of said temperature detecting unit is connected with the reference edge of this three-terminal voltage-stabilizing pipe, the positive terminal ground connection of three-terminal voltage-stabilizing pipe, and negative pole end is connected with the input end of photoelectricity coupling unit; The three-terminal voltage-stabilizing pipe produces control signal corresponding according to the temperature signal control photoelectricity coupling unit of temperature detecting unit feedback, makes refrigeration unit regulate its refrigeration work consumption according to control signal.
A kind of improvement as such scheme; It also comprises anti-self-excitation protected location, and this anti-self-excitation protected location is connected in reference edge and the resistance R e between the negative pole end and the capacitor C e of said three-terminal voltage-stabilizing pipe and/or is connected in the reference edge of said three-terminal voltage-stabilizing pipe and the resistance R d between the negative pole end after comprising mutual serial connection.
As the further improvement of such scheme, said temperature detecting unit is a negative tempperature coefficient thermistor.
The utlity model has following advantage: said comparing unit is the three-terminal voltage-stabilizing pipe, and prior art can reduce circuit cost greatly relatively, simplifies circuit structure.
Description of drawings:
Fig. 1 is the circuit structure diagram of existing temperature control circuit.
Fig. 2 is the circuit structure diagram of the utility model embodiment one.
Fig. 3 is the circuit structure diagram of the utility model embodiment two.
Embodiment:
Embodiment one: as shown in Figure 2; A kind of temperature control circuit; Comprise the temperature detecting unit, comparing unit, photoelectricity coupling unit and the refrigeration unit that connect successively; Said temperature detecting unit is negative tempperature coefficient thermistor Rb, and the end of negative tempperature coefficient thermistor Rb is connected its other end ground connection through resistance R a with power end Vr; Said comparing unit is the three-terminal voltage-stabilizing pipe; Its reference edge is connected between negative tempperature coefficient thermistor Rb and the resistance R a; The positive terminal ground connection of three-terminal voltage-stabilizing pipe, negative pole end is connected with an input end of photoelectricity coupling unit, and another input end of photoelectricity coupling unit is connected with another power end Vo through resistance R c; The three-terminal voltage-stabilizing pipe produces control signal corresponding according to the temperature signal control photoelectricity coupling unit of temperature detecting unit feedback, makes refrigeration unit regulate its refrigeration work consumption according to control signal.Its concrete principle of work is following: because of three-terminal voltage-stabilizing pipe inside has a reference data voltage Vr0, when the voltage at negative tempperature coefficient thermistor Rb two ends during less than reference data voltage Vr0, the The whole control circuit is failure to actuate; Along with decrease of temperature; The resistance of negative tempperature coefficient thermistor Rb increases gradually, and the voltage at negative tempperature coefficient thermistor Rb two ends is raise gradually, when the voltage at negative tempperature coefficient thermistor Rb two ends during more than or equal to said reference data voltage Vr0; The negative pole end voltage of three-terminal voltage-stabilizing pipe descends; The input end electric current of photoelectricity coupling unit is increased, thereby make the output terminal of photoelectricity coupling unit produce corresponding control signal, make refrigeration unit regulate its refrigeration work consumption according to control signal; Prevent that temperature from continuing to descend, realize Based Intelligent Control.The concrete parameter value of said resistance R a, negative tempperature coefficient thermistor Rb, power end Vr and said reference data voltage Vr0 can pass through formula:
confirm; When said three-terminal voltage-stabilizing pipe was selected TL431 series for use, its reference data voltage Vr0 was 2.5V; When said three-terminal voltage-stabilizing pipe was selected TL432 series for use, its reference data voltage Vr0 was 1.25V.
Embodiment two; As shown in Figure 3; Be with embodiment one difference; It also comprises anti-self-excitation protected location, and this anti-self-excitation protected location is connected in reference edge and the resistance R e between the negative pole end and the capacitor C e of said three-terminal voltage-stabilizing pipe and/or is connected in the reference edge of said three-terminal voltage-stabilizing pipe and the resistance R d between the negative pole end after comprising mutual serial connection.
The preferred embodiment that the above is merely the utility model is not to be used for limiting the scope that the utility model is implemented, and all equal variation and modifications of being done according to the utility model claim all fall into the scope that the utility model patent contains.
Claims (3)
1. temperature control circuit; Comprise the temperature detecting unit, comparing unit, photoelectricity coupling unit and the refrigeration unit that connect successively; It is characterized in that: said comparing unit is the three-terminal voltage-stabilizing pipe; The output terminal of said temperature detecting unit is connected with the reference edge of this three-terminal voltage-stabilizing pipe, the positive terminal ground connection of three-terminal voltage-stabilizing pipe, and negative pole end is connected with the input end of photoelectricity coupling unit; The three-terminal voltage-stabilizing pipe produces control signal corresponding according to the temperature signal control photoelectricity coupling unit of temperature detecting unit feedback, makes refrigeration unit regulate its refrigeration work consumption according to control signal.
2. a kind of temperature control circuit according to claim 1; It is characterized in that: also comprise anti-self-excitation protected location, this anti-self-excitation protected location is connected in reference edge and the resistance R e between the negative pole end and the capacitor C e of said three-terminal voltage-stabilizing pipe and/or is connected in the reference edge of said three-terminal voltage-stabilizing pipe and the resistance R d between the negative pole end after comprising mutual serial connection.
3. a kind of temperature control circuit according to claim 1 and 2 is characterized in that: said temperature detecting unit is a negative tempperature coefficient thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220090498 CN202600524U (en) | 2012-03-09 | 2012-03-09 | Temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220090498 CN202600524U (en) | 2012-03-09 | 2012-03-09 | Temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202600524U true CN202600524U (en) | 2012-12-12 |
Family
ID=47318053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220090498 Expired - Fee Related CN202600524U (en) | 2012-03-09 | 2012-03-09 | Temperature control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202600524U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024597A (en) * | 2014-04-21 | 2015-11-04 | 深圳创动科技有限公司 | Direct current fan voltage control circuit |
| CN106787627A (en) * | 2017-01-12 | 2017-05-31 | 广州金升阳科技有限公司 | The pressure equalizing control method of converter interacted system and the feedback control circuit of converter |
-
2012
- 2012-03-09 CN CN 201220090498 patent/CN202600524U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024597A (en) * | 2014-04-21 | 2015-11-04 | 深圳创动科技有限公司 | Direct current fan voltage control circuit |
| CN106787627A (en) * | 2017-01-12 | 2017-05-31 | 广州金升阳科技有限公司 | The pressure equalizing control method of converter interacted system and the feedback control circuit of converter |
| CN106787627B (en) * | 2017-01-12 | 2019-05-21 | 广州金升阳科技有限公司 | The feedback control circuit of converter |
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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 | ||
| CP02 | Change in the address of a patent holder |
Address after: 528300 Guangdong province Foshan city Beijiao District Shunde Town neighborhood orchid Jun Century Garden Jun Mei Road No. 99 Patentee after: Yang Yigen Address before: 528300 Guangdong city of Foshan province Hui Jing three Street No. 14 room 504 Patentee before: Yang Yigen |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20130309 |