CN2528044Y - Power supply voltage control circuit for refrigerator by semiconductor refrigeration - Google Patents
Power supply voltage control circuit for refrigerator by semiconductor refrigeration Download PDFInfo
- Publication number
- CN2528044Y CN2528044Y CN 01273039 CN01273039U CN2528044Y CN 2528044 Y CN2528044 Y CN 2528044Y CN 01273039 CN01273039 CN 01273039 CN 01273039 U CN01273039 U CN 01273039U CN 2528044 Y CN2528044 Y CN 2528044Y
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- Prior art keywords
- voltage
- circuit
- resistance
- refrigerator
- point
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- 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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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The utility model relates to a power-supply voltage control circuit of semiconductor refrigerator, which comprises a sampling circuit, a sampling voltage following circuit, and a voltage output circuit; the sampling circuit comprises a series-connection sensor S, a variable resistor VR, and a resistance R23, a sampling voltage point A is connected with the input end of the sampling voltage following circuit, the output end of the sampling voltage following circuit is connected with the constant reference voltage R point of an adjustable reference voltage source IC4 through a resistance R3; when the variable resistor VR is set to a certain value, the semiconductor cooler can always operate at balanced voltage so as to maintain constant temperature in the refrigerator, moreover the load in the refrigerator can be adjusted automatically. The utility model has the advantages of small temperature fluctuation and high temperature-control precision.
Description
Technical field
The utility model relates to a kind of source voltage control circuit of semiconductor refrigeration type refrigerator.
Background technology
In the prior art, the power panel control compressor operating of refrigerator, when the temperature recovery of cabinets cavity, power panel is controlled compressor operating after sampling, when the temperature of cabinets cavity is reduced to design temperature, power panel is controlled compressor and is quit work after sampling, promptly take the mode of general refrigerator " opening-stop-Kai-stop " to control the temperature of refrigerator inner cavity, range of temperature in its refrigerator inner cavity is big, this control mode only is applicable to the refrigerator of band compressor, and this refrigerator can't be made the little refrigerator of volume.
Summary of the invention
It is a kind of in the refrigerator of semiconductor cooler as low-temperature receiver that the purpose of this utility model is to provide, and can make the source voltage control circuit of continuous voltage-controlled semiconductor freezer to semiconductor cooler.
The technical solution of the utility model is: a kind of source voltage control circuit of semiconductor freezer, and it comprises sample circuit, sampled voltage follow circuit, voltage follower circuit; Described sample circuit comprises sensor S, variable resistor VR, the resistance R 23 that is in series, tie point between variable resistor VR and the resistance R 23 is sampled voltage point A, described sampled voltage point A connects the input end of sampled voltage follow circuit, and the output terminal of described sampled voltage follow circuit connects the constant reference voltage R point of adjustable reference voltage source IC4 by resistance R 3; Described voltage follower circuit comprises resistance R 19, and an end of this resistance R 19 is as the output terminal OUT of supply voltage, and the other end of resistance R 19 is connected on described constant reference voltage R point.
The utility model compared with prior art has following advantage:
When the temperature step-down in the refrigerator, it is big that the resistance of sensor S becomes, the electromotive force of sampling spot A uprises, electromotive force as the output terminal of sampled voltage follow circuit also uprises, because the electromotive force that the constant reference voltage R of adjustable reference voltage source IC4 is ordered is invariable, so electric potential difference step-down between resistance R 3 two ends, the electric current of the feasible resistance R 3 of flowing through reduces, electric current through resistance R 19 also reduces like this, make the voltage of OUT output terminal of voltage follower circuit reduce, make the operating voltage of semiconductor cooler reduce, then the temperature in the refrigerator can be gone up again; Otherwise reason when setting variable resistor VR is certain value, can make semiconductor cooler always with the operating voltage operation of balance too, and the temperature of keeping in the case is constant haply, and can adapt to the load in the refrigerator automatically.Temperature fluctuation amplitude in the refrigerator is little, the accuracy of temperature control height.
Description of drawings
Accompanying drawing is a circuit working schematic diagram of the present utility model;
Embodiment
Referring to accompanying drawing, a kind of source voltage control circuit of semiconductor freezer, it comprises sample circuit, sampled voltage follow circuit, voltage follower circuit; Described sample circuit comprises sensor S, variable resistor VR, the resistance R 23 that is in series, and the tie point between variable resistor VR and the resistance R 23 is sampled voltage point A.Described sampled voltage follow circuit comprises that model is voltage follower, resistance R 3 and the resistance R 6 of HA17324, the reference voltage source IC4 that model is TL431, described sampled voltage point A connects the input end of sampled voltage follow circuit, and the output terminal of described sampled voltage follow circuit connects the constant reference voltage R point of adjustable reference voltage source IC4 by resistance R 3; Described voltage follower circuit comprises resistance R 19, and an end of this resistance R 19 is as the output terminal OUT of supply voltage, and the other end of resistance R 19 is connected on described constant reference voltage R point.Coil L1 in the accompanying drawing, diode D1, D2, D3, D4, capacitor C 3, diode D5, diode D7 are used for alternating current is converted to direct current, and transformer T is used for direct current is become interchange, diode D6, D10, D9, D11 are used for interchange is become direct current, the model of ic chip 1 is 7808, be integrated package of pressure-stabilizing, be used for providing direct supply to the blower fan of refrigerator.IC3 is an optocoupler, and model is TLP521, and IC2 is a switching tube, and its model is TOP246Y, and IC3 and IC2 guarantee the output terminal OUT output constant set voltage of voltage follower circuit as the link of constant voltage feedback circuit.
Claims (1)
1, a kind of source voltage control circuit of semiconductor freezer is characterized in that: it comprises sample circuit, sampled voltage follow circuit, voltage follower circuit; Described sample circuit comprises sensor S, variable resistor VR, the resistance R 23 that is in series, tie point between variable resistor VR and the resistance R 23 is sampled voltage point A, described sampled voltage point A connects the input end of sampled voltage follow circuit, and the output terminal of described sampled voltage follow circuit connects the constant reference voltage R point of adjustable reference voltage source IC4 by resistance R 3; Described voltage follower circuit comprises resistance R 19, and an end of this resistance R 19 is as the output terminal OUT of supply voltage, and the other end of resistance R 19 is connected on described constant reference voltage R point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01273039 CN2528044Y (en) | 2001-12-24 | 2001-12-24 | Power supply voltage control circuit for refrigerator by semiconductor refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01273039 CN2528044Y (en) | 2001-12-24 | 2001-12-24 | Power supply voltage control circuit for refrigerator by semiconductor refrigeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2528044Y true CN2528044Y (en) | 2002-12-25 |
Family
ID=33678080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01273039 Expired - Fee Related CN2528044Y (en) | 2001-12-24 | 2001-12-24 | Power supply voltage control circuit for refrigerator by semiconductor refrigeration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2528044Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101614A1 (en) * | 2012-12-26 | 2014-07-03 | 宁波婷微电子科技有限公司 | Temperature-controlled semiconductor refrigeration apparatus |
| CN104180576A (en) * | 2014-09-03 | 2014-12-03 | 四川航天系统工程研究所 | Low-temperature semiconductor refrigerator and method for providing linear voltage for chilling plates of refrigerator |
| WO2015144077A1 (en) * | 2014-03-28 | 2015-10-01 | 海尔集团公司 | Semiconductor refrigerator, and supply voltage control method of semiconductor cooling piece thereof |
-
2001
- 2001-12-24 CN CN 01273039 patent/CN2528044Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101614A1 (en) * | 2012-12-26 | 2014-07-03 | 宁波婷微电子科技有限公司 | Temperature-controlled semiconductor refrigeration apparatus |
| WO2015144077A1 (en) * | 2014-03-28 | 2015-10-01 | 海尔集团公司 | Semiconductor refrigerator, and supply voltage control method of semiconductor cooling piece thereof |
| CN104180576A (en) * | 2014-09-03 | 2014-12-03 | 四川航天系统工程研究所 | Low-temperature semiconductor refrigerator and method for providing linear voltage for chilling plates of refrigerator |
| CN104180576B (en) * | 2014-09-03 | 2016-08-17 | 四川航天系统工程研究所 | Cryogenic semiconductor refrigerator and the method providing linear voltage for its cooling piece |
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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 |