CN2325808Y - Constant-current refrigeration temperature controller - Google Patents
Constant-current refrigeration temperature controller Download PDFInfo
- Publication number
- CN2325808Y CN2325808Y CN 97242046 CN97242046U CN2325808Y CN 2325808 Y CN2325808 Y CN 2325808Y CN 97242046 CN97242046 CN 97242046 CN 97242046 U CN97242046 U CN 97242046U CN 2325808 Y CN2325808 Y CN 2325808Y
- Authority
- CN
- China
- Prior art keywords
- constant current
- current source
- control circuit
- circuit
- resistance
- 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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- 238000005057 refrigeration Methods 0.000 title claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000005693 optoelectronics Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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Abstract
The utility model provides a constant current refrigeration temperature controller, the utility model discloses a characteristics are that its power supply controller comprises constant current source and control circuit and optoelectronic coupler, and its control circuit adopts the structure that can partly cut off supply current to control the constant current source, makes like this that the electric current all rises gradually or reduces when freezer starts or stops, can obviously reduce electromagnetic vibration and interference, has prolonged semiconductor freezer's life, has simple structure, the easy advantage of preparation, be applicable to the refrigeration temperature control of various semiconductor freezers.
Description
The utility model belongs to the architecture advances of Temperature Controller by Means of Semi conductor, relates to electronic technology field.
Present semiconductor cooler adopts constant voltage direct current supply more, carries out temperature control with the way of cutting off the electricity supply.Because semiconductor cooler is the low-voltage, high-current power supply, so the minor fluctuations of voltage all can cause the variation that load current is bigger, even is burnt out; On the other hand, the conversion of the break-make of big electric current will cause electric and magnetic oscillation and electromagnetic interference (EMI), and this serviceable life and Detection of weak thereof to semiconductor cooler is extremely harmful.Constituting of existing refrigeration temperature controller circuit part, the temperature comparator and the power-supply controller that are made of temperature measurement circuit, comparer and follower are communicated to load, and the utility model is exactly that the structure of power-supply controller is improved.
The purpose of this utility model is, designs a kind of constant current refrigeration temperature controller, can reduce electric and magnetic oscillation and interference, prolongs the serviceable life of semiconductor cooler.
The technical solution of the utility model is, in the circuit that is communicated to the refrigeration temperature controller that load constitutes by temperature comparator and power-supply controller, power-supply controller is improved, it is characterized in that, power-supply controller is made of constant current source and control circuit and photoelectrical coupler, output terminal by temperature comparator is connected to control circuit through photoelectrical coupler earlier, controls constant current source by control circuit with the structure that can partly cut off electric current again.Wherein control circuit adopts the structure that the setting potentiometer of a transistor AND gate constant current source is in parallel; The photoelectrical coupler that is connected on the operation circuit input end can be kept apart the ground wire of the ground wire of constant current source and temperature comparator.
By as can be seen above-mentioned, because the utility model adopts constant current source and photoelectrical coupler and can partly cut off the control circuit of supply current, the variation of internal resistance when utilizing the transistor break-make, thereby make designed refrigeration temperature controller when refrigeration, can supply with required amount of money electric current, a part sever supply electric current when stopping refrigeration, make like this refrigerator starting or when stopping electric current all be to rise gradually or reduce, obviously reduce electric and magnetic oscillation and interference, prolonged the serviceable life of semiconductor cooler.Simple in structure, the easy advantage of making that the utility model also has is applicable to the refrigeration temperature control of various semiconductor coolers.
Accompanying drawing 1 is the structured flowchart of the designed constant current refrigeration of the utility model temperature controller circuit, and frame of broken lines is feature of the present utility model place among the figure; Accompanying drawing 2 is the circuit theory diagrams of a kind of example of power-supply controller in the designed constant current refrigeration of the utility model temperature controller, and a is being connected of temperature comparator with b among the figure.
Describe embodiment of the present utility model and principle of work in detail below in conjunction with accompanying drawing.
Referring to accompanying drawing, the designed refrigeration temperature controller of the utility model is to be made of temperature comparator and power-supply controller two parts, and wherein temperature comparator is made up of temperature measurement circuit, comparer, follower, belongs to prior art, repeats no more here; And power-supply controller is by constant current source, and control circuit and photoelectrical coupler are formed, and its components and parts that use also belong to prior art; Its syndeton is, and is first through photoelectrical coupler I by the output line a and the b of temperature comparator
4Be connected to control circuit control constant current source again; Constituting of control circuit, integrated electro coupling mechanism I
4, resistance R
13-15, light emitting diode D
3, transistor T
1And T
4, photoelectrical coupler I
4Can isolate the ground wire of the ground wire of constant current source and temperature comparator, and transistor T
1The setting potentiometer W of (can select the NPN type for use) and constant current source
1Parallel-connection structure, can realize the part cut off supply current reach control constant current source purpose; Constituting of constant current source by transformer B, rectifier bridge B
1, capacitor C
3And resistance R
12The current rectifying and wave filtering circuit that constitutes is by resistance R
11With light emitting diode D
2Constitute the power connection indicating circuit, by integrated three-terminal regulator block I
2, capacitor C
4And C
5, resistance R
16And setting potentiometer W
1Constitute reference power supply, by operational amplifier I
3, resistance R
17-20And capacitor C
1Constitute error amplifier, by transistor T
2And T
3Constitute current amplifier, resistance R
21Be the constant current source internal burden, RL is outer load.
Referring to accompanying drawing, principle of work of the present utility model is as follows, and when temperature was higher than the refrigerator setting value, the high level that is transmitted by temperature comparator was through photoelectrical coupler I
4After, output low level, the one tunnel makes transistor T
4Conducting makes luminotron D
3Light, show that the required electric current of refrigeration fully supplies with; Another road makes transistor T
1Carry and end, to semiconductor cooler RL power supply, temperature reduces constant current source by the refrigeration electric current of setting.When temperature reached or be lower than the refrigerator setting value, the low level that temperature comparator transmits was through photoelectrical coupler I
4After, the output high level, the one tunnel makes transistor T
4Carry and only make luminotron D
3Extinguish, show to be in non-amount of money power supply state; Another road makes transistor T
1Conducting is because T
1To potentiometer W
1Shunting action in parallel, reduced potentiometer W
1Voltage on the center tap, the electric current that constant current source is exported can gently reduce the supply current to refrigerator RL, makes temperature be small change near setting value.Avoided because of interference and the influence of electric current cataclysm other devices generations.
The constant current refrigeration temperature controller that the inventor makes by above-mentioned requirements, through using and detecting, 0.5-10A is adjustable for its constant current source power supply electric current, and current stability, is 1%, and temperature controlling range depends on the performance of semiconductor cooler, and control accuracy is ± 0.5 ℃.
Claims (3)
1. constant current refrigeration temperature controller, its circuit part is made up of temperature comparator and power-supply controller, it is characterized in that, described power-supply controller is made up of constant current source and control circuit and photoelectrical coupler, be to be connected to control circuit through photoelectrical coupler by the output line of temperature comparator is first, by the output of control circuit control constant current source, its control circuit cuts off the structure of supply current for part again.
2. controller according to claim 1 is characterized in that, the constituting of described control circuit: photoelectrical coupler I
4, resistance R
13, R
14, R
15, light emitting diode D
3, transistor T
1And T
4Transistor T wherein
1Setting potentiometer W with constant current source
1Be in parallel photoelectrical coupler I
4Can keep apart the ground wire of the ground wire of constant current source and temperature comparator.
3. controller according to claim 2 is characterized in that, the structure of described constant current source is: the power supply electricity is entered by rectifier bridge B by transformer B
1, capacitor C
3And resistance R
12The current rectifying and wave filtering circuit that constitutes, the direct current of output divide four the tunnel, the one road to insert by resistance R
11With light emitting diode D
2The power connection indicating circuit that constitutes, another road is inserted by integrated three-terminal regulator block I
2, capacitor C
4And C
5, resistance R
16And potentiometer W
1The reference power circuit that constitutes for controller provides reference power supply, the one road inserts by operational amplifier I again
3, resistance R
17, R
18, R
19, R
20And capacitor C
1The error amplifier circuit that constitutes is used to detect error signal, also has one the road to insert by transistor T
2And T
3The current amplifier that constitutes obtains required output current, is parallel with constant current source internal burden R in the output terminal and the load of current amplifier
21
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97242046 CN2325808Y (en) | 1997-10-20 | 1997-10-20 | Constant-current refrigeration temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97242046 CN2325808Y (en) | 1997-10-20 | 1997-10-20 | Constant-current refrigeration temperature controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2325808Y true CN2325808Y (en) | 1999-06-23 |
Family
ID=33951382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97242046 Expired - Fee Related CN2325808Y (en) | 1997-10-20 | 1997-10-20 | Constant-current refrigeration temperature controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2325808Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296788C (en) * | 2003-03-16 | 2007-01-24 | 华为技术有限公司 | Temperature controlling system |
| CN101976088A (en) * | 2010-09-29 | 2011-02-16 | 南京航空航天大学 | Pressure sensitive paint measurement oriented temperature control device |
| CN109579352A (en) * | 2018-11-09 | 2019-04-05 | 中国科学院长春光学精密机械与物理研究所 | A kind of refrigerator for photodetector |
-
1997
- 1997-10-20 CN CN 97242046 patent/CN2325808Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296788C (en) * | 2003-03-16 | 2007-01-24 | 华为技术有限公司 | Temperature controlling system |
| CN101976088A (en) * | 2010-09-29 | 2011-02-16 | 南京航空航天大学 | Pressure sensitive paint measurement oriented temperature control device |
| CN109579352A (en) * | 2018-11-09 | 2019-04-05 | 中国科学院长春光学精密机械与物理研究所 | A kind of refrigerator for photodetector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |