CN201278119Y - Temperature control circuit used for household computer cabinet internal heat radiation - Google Patents
Temperature control circuit used for household computer cabinet internal heat radiation Download PDFInfo
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- CN201278119Y CN201278119Y CNU2008201736578U CN200820173657U CN201278119Y CN 201278119 Y CN201278119 Y CN 201278119Y CN U2008201736578 U CNU2008201736578 U CN U2008201736578U CN 200820173657 U CN200820173657 U CN 200820173657U CN 201278119 Y CN201278119 Y CN 201278119Y
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- temperature control
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Abstract
The utility model relates to a temperature control circuit used for eliminating heat from the inside of the case of a home computer. The temperature control circuit is characterized by comprising a voltage compare circuit (1), a drive circuit (2) and a fan (3). The output end of the voltage compare circuit (1) is connected with the input end of the drive circuit (2), the output end of the drive circuit (2) is connected with the fan (3), the voltage compare circuit (1) adopts an LM358 chip to realize a voltage compare part and the function of reverse hysteresis, and the drive circuit (2) adopts a medium power amplifying triode TIP41. The utility model has the advantages by having simple structure, high accuracy and good effect of temperature control, and no interference for the complete computer, ensuring the regular service of the home computer, and prolonging the service life.
Description
Technical field
The utility model relates to the temperature-control circuit technical field, especially a kind of temperature control circuit that is used for the heat radiation of household PC cabinet inside.
Background technology
In the mainframe box of general household PC only CPU and power supply radiator fan is arranged, in scorching summer, the temperature in the mainframe box of household PC also raises with the rising of the temperature in the external world, the components and parts temperature is too high to tend to cause deadlock, household PC can't normally use.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, external effective temperature control circuit that is used for household PC cabinet inside heat radiation of noiseless, temperature control.For achieving the above object, the technical scheme that the utility model adopted is: the utility model is made of voltage comparator circuit, driving circuit and fan.The output terminal of voltage comparator circuit and the input end of driving circuit join, the output terminal wind-receiving fan of driving circuit.Said voltage comparator circuit adopts the LM358 chip to realize the function of voltage rating unit and reverse hysteresis, 1 end of LM358 and resistance R 7, R8, R9, one end of R10 and capacitor C 1 joins, 2 ends of LM358 and resistance R 2, the end of R4 joins and joins with the positive pole of capacitor C 8,3 ends and the resistance R 5 of the 2 end LM358 of LM358, the end of thermistor R6 joins and joins with the other end of resistance R 8, the 4 end ground connection of LM358,5 ends and the C1 of LM358, R2, the other end of R7 thermistor R6 joins, resistance R 4, R5, the minus earth of the other end of R10 and capacitor C 8.Power amplification triode TIP41 constituted during said driving circuit adopted, the positive pole of the emitter of TIP41 and the positive pole of light emitting diode, capacitor C 3 and C6 and the end of capacitor C 4 and C5 join, the negative pole of light emitting diode is by resistance R 11 ground connection, the other end ground connection of the negative pole of capacitor C 3 and C6 and capacitor C 4 and C5, one end of the collector of TIP41 and capacitor C 2, the positive pole of capacitor C 7 and the positive pole of power supply join, the minus earth of the other end of capacitor C 2 and capacitor C 7.In the voltage comparator circuit in the other end of resistance R 9 and the driving circuit base stage of TIP41 join the two ends wind-receiving fan of capacitor C 6.
The beneficial effects of the utility model are: simple in structure, the temperature-controlled precision height is effective, and is noiseless to complete machine, guaranteed the normal use of household PC, and prolonged serviceable life.
Description of drawings
Fig. 1 is a block diagram of the present utility model:
Fig. 2 is the electrical schematic diagram of the utility model embodiment.
Among the figure, 1, voltage comparator circuit, 2, driving circuit, 3, fan.
Embodiment
With reference to accompanying drawing, below the technical solution of the utility model is described further:
The utility model is made of voltage comparator circuit 1, driving circuit 2 and fan 3, and the input end of the output terminal of voltage comparator circuit 1 and driving circuit 2 joins, the output terminal wind-receiving fan 3 of driving circuit 2.Said voltage comparator circuit 1 adopts the LM358 chip to realize the function of voltage rating unit and reverse hysteresis, 1 end of LM358 and resistance R 7, R8, R9, one end of R10 and capacitor C 1 joins, 2 ends of LM358 and resistance R 2, the end of R4 joins and joins with the positive pole of capacitor C 8,3 ends and the resistance R 5 of the 2 end LM358 of LM358, the end of thermistor R6 joins and joins with the other end of resistance R 8, the 4 end ground connection of LM358,5 ends and the C1 of LM358, R2, the other end of R7 thermistor R6 joins, resistance R 4, R5, the minus earth of the other end of R10 and capacitor C 8.Power amplification triode TIP41 constituted during said driving circuit 2 adopted, the positive pole of the emitter of TIP41 and the positive pole of light emitting diode, capacitor C 3 and C6 and the end of capacitor C 4 and C5 join, the negative pole of light emitting diode is by resistance R 11 ground connection, the other end ground connection of the negative pole of capacitor C 3 and C6 and capacitor C 4 and C5, one end of the collector of TIP41 and capacitor C 2, the positive pole of capacitor C 7 and the positive pole of power supply join, the minus earth of the other end of capacitor C 2 and capacitor C 7.In the voltage comparator circuit in the other end of resistance R 9 and the driving circuit base stage of TIP41 join the two ends wind-receiving fan 3 of capacitor C 6.
Principle of work of the present utility model is such: when temperature did not raise, the resistance of thermistor R6 was during greater than 4.7K, and the voltage of the pin 3 of LM358 is less than the voltage of pin 2, and pin 1 is output as low level 0V, and triode Q2 is output as low level, and fan is not worked.When temperature raises, the resistance of thermistor R6 will reduce.When the resistance of R6 drops to 4.7K when following, the voltage of the pin 3 of LM358 is greater than the voltage of pin 2, and the 1 pin output voltage of LM358 is high level 12V.Q2 is output as high level 12V.Fan is started working.After fan was started working, when temperature dropped to a certain degree, when the resistance of thermistor R6 was increased to greater than 4.7K, fan quit work again, can keep the temperature of cabinet to be lower than the temperature that we set ourselves so always.
Claims (2)
1, a kind of temperature control circuit that is used for the heat radiation of household PC cabinet inside, it is characterized in that constituting by voltage comparator circuit (1), driving circuit (2) and fan (3), the input end of the output terminal of voltage comparator circuit (1) and driving circuit (2) joins, the output terminal wind-receiving fan (3) of driving circuit (2).
2, according to the said temperature control circuit that is used for the heat radiation of household PC cabinet inside of claim 1, it is characterized in that said voltage comparator circuit (1) adopts the LM358 chip to realize the function of voltage rating unit and reverse hysteresis, 1 end of LM358 and resistance R 7, R8, R9, one end of R10 and capacitor C 1 joins, 2 ends of LM358 and resistance R 2, the end of R4 joins and joins with the positive pole of capacitor C 8,3 ends and the resistance R 5 of the 2 end LM358 of LM358, the end of thermistor R6 joins and joins with the other end of resistance R 8, the 4 end ground connection of LM358,5 ends and the C1 of LM358, R2, the other end of R7 thermistor R6 joins, resistance R 4, R5, the minus earth of the other end of R10 and capacitor C 8, power amplification triode TIP41 constituted during said driving circuit (2) adopted, the emitter of TIP41 and the positive pole of light emitting diode, the end of the positive pole of capacitor C 3 and C6 and capacitor C 4 and C5 joins, the negative pole of light emitting diode is by resistance R 11 ground connection, the other end ground connection of the negative pole of capacitor C 3 and C6 and capacitor C 4 and C5, one end of the collector of TIP41 and capacitor C 2, the positive pole of capacitor C 7 and the positive pole of power supply join, the minus earth of the other end of capacitor C 2 and capacitor C 7, in the voltage comparator circuit in the other end of resistance R 9 and the driving circuit base stage of TIP41 join the two ends wind-receiving fan 3 of capacitor C 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201736578U CN201278119Y (en) | 2008-10-24 | 2008-10-24 | Temperature control circuit used for household computer cabinet internal heat radiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201736578U CN201278119Y (en) | 2008-10-24 | 2008-10-24 | Temperature control circuit used for household computer cabinet internal heat radiation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201278119Y true CN201278119Y (en) | 2009-07-22 |
Family
ID=40895706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201736578U Expired - Fee Related CN201278119Y (en) | 2008-10-24 | 2008-10-24 | Temperature control circuit used for household computer cabinet internal heat radiation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201278119Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491259A (en) * | 2020-11-23 | 2021-03-12 | 无锡科索电子有限公司 | Low-power-consumption switching power supply with fan |
-
2008
- 2008-10-24 CN CNU2008201736578U patent/CN201278119Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491259A (en) * | 2020-11-23 | 2021-03-12 | 无锡科索电子有限公司 | Low-power-consumption switching power supply with fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20091124 |