CN208950942U - A kind of DC fan automatic pressure-transforming alignment circuit - Google Patents
A kind of DC fan automatic pressure-transforming alignment circuit Download PDFInfo
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- CN208950942U CN208950942U CN201821577155.1U CN201821577155U CN208950942U CN 208950942 U CN208950942 U CN 208950942U CN 201821577155 U CN201821577155 U CN 201821577155U CN 208950942 U CN208950942 U CN 208950942U
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- fan
- transforming
- thermistor
- automatic pressure
- alignment circuit
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Abstract
The utility model discloses a kind of DC fan automatic pressure-transforming alignment circuit, including DC fan, DC fan has first end and the second end, wherein the second end is connected with ground wire, and first end is connected with voltage source VCC；Bleeder circuit is provided in connection line between first end and voltage source VCC；Bleeder circuit includes divider resistance R2 and thermistor R1.The utility model is a kind of practicability alignment circuit, it is serially connected in fan loop by the thermistor of negative temperature coefficient, used as with the adjustable divider resistance of its resistance value of temperature change, realize rotating speed of DC fan with the variation of temperature real-time change, reach to fan speed-regulating purpose.
Description
Technical field:
The utility model relates to speed regulation circuit for fan technical fields, and in particular to a kind of DC fan automatic pressure-transforming speed regulation electricity
Road.
Background technique:
Fan is a kind of electric appliance for heat dissipation, and the faster heat dissipation effect of the revolving speed of fan is better theoretically, but in this way
It is also bigger to do the noise generated, if do not adjusted the speed, fan long-time high-speed cruising not only influences the service life of fan, and
And also bring unnecessary noise problem.
For above-mentioned speed regulation problem, design has some speed regulation circuit for fan in the prior art, but these alignment circuits are not only
Circuit complexity is difficult to realize speed regulation effect, and higher cost, unsuitable practical application.How to design one kind as a result, can reduce
Fan noise increases fan service life, and circuit is simple, low-cost speed regulation circuit for fan is skill that we need to solve
Art problem.
Utility model content:
The purpose of this utility model provides a kind of DC fan automatic pressure-transforming speed regulation aiming at the deficiencies in the prior art
Circuit.
The technology solution of the utility model is as follows:
A kind of DC fan automatic pressure-transforming alignment circuit comprising DC fan, DC fan have first end and the
Two ends, wherein the second end is connected with ground wire, and first end is connected with voltage source VCC；
Bleeder circuit is provided in connection line between first end and voltage source VCC；
Bleeder circuit includes divider resistance R2 and thermistor R1；
Divider resistance R2 is adjustable resistance；
Thermistor R1 is negative tempperature coefficient thermistor.
Thermistor R1 is installed on a heat sink face, is used for detection device temperature, and resistance value subtracts as the temperature rises
It is small；By reasonably adjusting the size of divider resistance R2 resistance value, with the variation of temperature, DC fan first end and second end
Portion obtains different supply voltages, realizes the different revolving speed of fan.
The utility model has the beneficial effects that: this programme is a kind of practicability alignment circuit, pass through negative temperature coefficient
Thermistor is serially connected in fan loop, is used as with the adjustable divider resistance of its resistance value of temperature change, is realized direct current
Rotation speed of the fan real-time change with the variation of temperature, reaches to fan speed-regulating purpose.The application can reduce fan noise, increase
Long fan service life, and circuit is simple, low in cost, practicability is high.
Detailed description of the invention:
Fig. 1 is the circuit function block diagram of the utility model.
Specific embodiment:
It is right with reference to the accompanying drawing in order to keep the above objects, features, and advantages of the utility model more obvious and easy to understand
Specific embodiment of the present utility model is described in detail.
As shown in Figure 1, a kind of DC fan automatic pressure-transforming alignment circuit comprising DC fan, DC fan have the
One end A1 and the second end A2, wherein the second end A2 is connected with ground wire, and first end A1 is connected with voltage source VCC；
Bleeder circuit is provided in connection line between first end A1 and voltage source VCC；
Bleeder circuit includes divider resistance R2 and thermistor R1；
Divider resistance R2 is adjustable resistance；
Thermistor R1 is negative tempperature coefficient thermistor.
Thermistor R1 is installed on a heat sink face, is used for detection device temperature, and resistance value subtracts as the temperature rises
It is small；By reasonably adjusting the size of divider resistance R2 resistance value, with the variation of temperature, DC fan first end A1 and second
End A2 obtains different supply voltages, realizes the different revolving speed of fan.
Working principle: due to the thermistor that thermistor R1 is negative temperature coefficient, characteristic is its resistance value with temperature
Raising and reduce.Therefore gradually risen when with equipment cooling device temperature, the resistance value of thermistor R1 is gradually reduced, by partial pressure electricity
Road will be it is found that the supply voltage that DC fan first end A1 and the second end A2 are obtained will be gradually increased, therefore the revolving speed of fan
Also just gradually accelerate；When equipment cooling device temperature reduce when, the resistance value of thermistor R1 increases with it, by bleeder circuit it is found that
The supply voltage that DC fan first end A1 and the second end A2 is obtained will reduce, therefore the revolving speed of fan also just becomes therewith
It is slow.In short, when the temperature increases, by bleeder circuit, the supply voltage that DC fan obtains increases, and rotation speed of the fan is accelerated；When
When temperature reduces, by bleeder circuit, the supply voltage that DC fan obtains reduces, and rotation speed of the fan becomes slower.
In this way design, be serially connected in fan loop using the thermistor of negative temperature coefficient, as with temperature change its
The adjustable divider resistance of resistance value uses, realize rotating speed of DC fan with the variation of temperature real-time change.
The embodiment is rather than limited the present invention the utility model is illustrated.Any this field
Technical staff can modify to the embodiment under the spirit and scope without prejudice to the utility model, therefore this is practical
Novel rights protection scope, should be as listed by the claim of the utility model.
Claims (4)
1. a kind of DC fan automatic pressure-transforming alignment circuit, it is characterised in that: including DC fan, DC fan has first end
Portion and the second end, wherein the second end is connected with ground wire, and first end is connected with voltage source VCC；
Bleeder circuit is provided in connection line between first end and voltage source VCC.
2. a kind of DC fan automatic pressure-transforming alignment circuit according to claim 1, it is characterised in that: bleeder circuit includes
Divider resistance R2 and thermistor R1.
3. a kind of DC fan automatic pressure-transforming alignment circuit according to claim 2, it is characterised in that: divider resistance R2 is
Adjustable resistance.
4. a kind of DC fan automatic pressure-transforming alignment circuit according to claim 2, it is characterised in that: thermistor R1 is
Negative tempperature coefficient thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821577155.1U CN208950942U (en) | 2018-09-27 | 2018-09-27 | A kind of DC fan automatic pressure-transforming alignment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821577155.1U CN208950942U (en) | 2018-09-27 | 2018-09-27 | A kind of DC fan automatic pressure-transforming alignment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208950942U true CN208950942U (en) | 2019-06-07 |
Family
ID=66739597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821577155.1U Active CN208950942U (en) | 2018-09-27 | 2018-09-27 | A kind of DC fan automatic pressure-transforming alignment circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208950942U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058149A (en) * | 2018-09-27 | 2018-12-21 | 东莞市广荣电子制品有限公司 | A kind of DC fan automatic pressure-transforming alignment circuit |
-
2018
- 2018-09-27 CN CN201821577155.1U patent/CN208950942U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058149A (en) * | 2018-09-27 | 2018-12-21 | 东莞市广荣电子制品有限公司 | A kind of DC fan automatic pressure-transforming alignment circuit |
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