CN203535563U - Automatic temperature control circuit of notebook computer - Google Patents
Automatic temperature control circuit of notebook computer Download PDFInfo
- Publication number
- CN203535563U CN203535563U CN201320659651.2U CN201320659651U CN203535563U CN 203535563 U CN203535563 U CN 203535563U CN 201320659651 U CN201320659651 U CN 201320659651U CN 203535563 U CN203535563 U CN 203535563U
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- circuit
- amplifier
- diode
- notebook computer
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- Expired - Fee Related
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Abstract
The utility model provides an automatic temperature control circuit of a notebook computer. One end of a circuit with a thermistor with a negative temperature coefficient and a first resistor connected in series is connected with a circuit power source, and the other end is grounded. The public end of the thermistor and the first resistor is connected with the positive input end of an amplifier, one end of a second resistor and a potentiometer in series connection is connected with the circuit power source, and the other end is grounded. The regulating end of the potentiometer is connected with the negative input end of the amplifier, the output end of the amplifier is connected with the negative signal end of a normally open relay through a current limiting resistor, the positive signal end of the normally open relay is connected with the circuit power source, and a power circuit of the normally open relay is connected into a CPU fan motor circuit in series. A first diode and a second diode are connected between a power source circuit and the ground in series, and the public end of the first diode and the second diode is connected with the output end of the amplifier through the current limiting resistor. Through the technical scheme, not only can the purpose of automatic temperature control be achieved only through the circuit of the thermistor and the amplifier, but also the automatic temperature control circuit of the notebook computer is not prone to electromagnetic interference, good in stability and suitable for using the notebook computer in a complex environment.
Description
Technical field
The utility model relates to a kind of temperature-control circuit, particularly a kind of notebook computer automatic temp. controlling circuit.
Background technology
Temperature is the key factor that affects notebook computer reliability, and effectively reducing temperature is the design factor that Electronics Engineer must consider, the principle of thermal design has two: the one, and reduce power consumption, reduce heating, the 2nd, strengthen heat radiation.Existing notebook computer adopts cpu fan heat radiation, and fan ceaselessly rotates, but the in the situation that of low-power consumption, fan also can turn round, and has not only wasted the limited electric energy of cells in notebook computer, also can increase extra noise.Therefore, designer can design some circuit and make stopping fan rotation in low-power consumption situation, and computer internal temperature rising aft-fan is devoted oneself to work again.But existing circuit is more complicated mostly, and unstable, be not suitable for portable notebook computer.
Utility model content
Goal of the invention of the present utility model is a kind of simple in structure, reliable and stable notebook computer automatic temp. controlling circuit of design, and its concrete technical scheme is:
A kind of notebook computer automatic temp. controlling circuit, series circuit one end connecting circuit power supply of the thermistor of negative temperature coefficient and the first resistance, one end ground connection, thermistor is connected the positive input terminal of amplifier with the common port of the first resistance, one end connecting circuit power supply after the second resistance and potentiometer series connection, one end ground connection, the adjustable side of potentiometer connects the negative input end of amplifier, the output terminal of amplifier connects the negative signal end of normally opened relay by current-limiting resistance, the positive signal end connecting circuit power supply of normally opened relay, the power circuit of normally opened relay is serially connected in cpu fan motor circuit, between power circuit and ground, be connected in series the first diode and the second diode, the common port of the first diode and the second diode is connected the output terminal of amplifier by current-limiting resistance.
Adopt technique scheme, only by thermistor and amplifier circuit, just can realize the object that automatic temperature-adjusting is controlled, and be not easy to be subject to electromagnetic interference (EMI), good stability, is adapted at complex environment and uses notebook computer.
Accompanying drawing explanation
Fig. 1 notebook computer automatic temp. controlling circuit circuit diagram.
Embodiment
The embodiment setting forth below represents and allows those skilled in the art to put into practice necessary information of the present utility model, and illustrates and put into practice best mode of the present utility model.Once read with reference to the accompanying drawings following description, those skilled in the art just will understand design of the present utility model and will recognize the application of these designs of not illustrating especially herein.Should be appreciated that these designs and application fall into the scope of disclosure and the accompanying claims book.
With reference to Fig. 1, a kind of notebook computer automatic temp. controlling circuit, series circuit one end connecting circuit power supply+5V of the thermistor Rt of negative temperature coefficient and the first resistance R 1, one end ground connection, thermistor Rt is connected the positive input terminal of amplifier U1 with the common port of the first resistance R 1, the voltage of positive input terminal is VA, one end connecting circuit power supply+5V after the second resistance R 2 and potentiometer Rp series connection, one end ground connection, the adjustable side of potentiometer Rp connects the negative input end of amplifier U1, the voltage of negative input end is VB, the output terminal of amplifier U1 connects the negative signal end of normally opened relay K by current-limiting resistance R3, positive signal end connecting circuit power supply+5V of normally opened relay K, the power circuit of normally opened relay K is serially connected in cpu fan motor M circuit, between power circuit+5V and ground, be connected in series the first diode DZ1 and the second diode DZ2, the common port of the first diode DZ1 and the second diode DZ2 is connected the output terminal of amplifier U1 by current-limiting resistance R3.
Thermistor Rt is generally arranged on CPU radiating fin, the temperature of monitoring CPU, when the temperature rising of heat radiator, the resistance of thermistor Rt declines, and VA rises, when VA>VB, amplifier U1 exports high level, and normally opened relay K is closed, cpu fan circuit start, otherwise CPU does not start.
Obviously, above-described embodiment is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And these belong to apparent variation that spirit of the present utility model extended out or change still among protection domain of the present utility model.
Claims (1)
1. a notebook computer automatic temp. controlling circuit, it is characterized in that the thermistor of negative temperature coefficient and series circuit one end connecting circuit power supply of the first resistance, one end ground connection, thermistor is connected the positive input terminal of amplifier with the common port of the first resistance, one end connecting circuit power supply after the second resistance and potentiometer series connection, one end ground connection, the adjustable side of potentiometer connects the negative input end of amplifier, the output terminal of amplifier connects the negative signal end of normally opened relay by current-limiting resistance, the positive signal end connecting circuit power supply of normally opened relay, the power circuit of normally opened relay is serially connected in cpu fan motor circuit, between power circuit and ground, be connected in series the first diode and the second diode, the common port of the first diode and the second diode is connected the output terminal of amplifier by current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320659651.2U CN203535563U (en) | 2013-10-25 | 2013-10-25 | Automatic temperature control circuit of notebook computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320659651.2U CN203535563U (en) | 2013-10-25 | 2013-10-25 | Automatic temperature control circuit of notebook computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203535563U true CN203535563U (en) | 2014-04-09 |
Family
ID=50421754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320659651.2U Expired - Fee Related CN203535563U (en) | 2013-10-25 | 2013-10-25 | Automatic temperature control circuit of notebook computer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203535563U (en) |
-
2013
- 2013-10-25 CN CN201320659651.2U patent/CN203535563U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20141025 |
|
| EXPY | Termination of patent right or utility model |