CN201170865Y - Control circuit for computer fan - Google Patents
Control circuit for computer fan Download PDFInfo
- Publication number
- CN201170865Y CN201170865Y CNU2008200446012U CN200820044601U CN201170865Y CN 201170865 Y CN201170865 Y CN 201170865Y CN U2008200446012 U CNU2008200446012 U CN U2008200446012U CN 200820044601 U CN200820044601 U CN 200820044601U CN 201170865 Y CN201170865 Y CN 201170865Y
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- Prior art keywords
- control circuit
- triode
- computer
- fan
- voltage
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Abstract
The utility model discloses a computer fan control circuit. The computer fan control circuit comprises an activating voltage, a triode, a thermistance, a service voltage, a diode and a fan; wherein, the emitter of the triode is electrically connected with the output end of the activating voltage; the base of the triode is connected with one end of the thermistance; the collector of the triode is respectively connected with the output end of the diode and the input end of the fan; the other end of the thermistance is grounded; the thermistance utilizes the change of temperature to change the resistance value of self as well as the current strength in the circuit in order to change the working state of the triode; the input end of the diode is connected with the service voltage; the output end of the fan is grounded. The computer fan control circuit eliminates the heat generated by the electrified devices of a hibernating or shutdown computer, so that the devices and the chips in the computer can be prevented from being burnt out.
Description
[technical field]
The utility model relates to a kind of computer fan control circuit, the fan control circuitry of particularly a kind of computer system under multiple standby.
[background technology]
Along with the progress of electronic information society, a large amount of electronic products flood the market, and have quickened scientific and technological progress.People's life, work more and more be unable to do without computer, and computer helps us to handle, transmit, storing mass data.The CPU of computer configuration at present, along with the high speed and the Highgrade integration of operation pulse, its performance rapidly improves.But in general, it is also many more to produce heat during the high more operation of the performance of CPU.Because computer also can have the electric current generation by activation voltage when dormant state S3 or off-mode S5, so a lot of devices can produce the part heat in the motherboard, meeting so of long duration burns out a part of device chip.
Fig. 1 illustrates the circuit diagram of known computer fan control circuit.
See also shown in Figure 1ly, it is the circuit diagram of known computer fan control circuit, and this computer fan control circuit comprises: a supply voltage 10, one fans 20, the one end is connected with supply voltage 10, other end ground connection.
In view of this, be necessary to propose a kind of computer fan control circuit in fact, utilize this computer fan control circuit can so that computer fan also can operate as normal when dormant state S3 or off-mode S5, the heat that elimination produces when part of devices is alived in the computer under these states prevents that part of devices in the computer, chip from burning out.
[summary of the invention]
Therefore, the utility model provides a kind of computer fan control circuit, and fan also can operate as normal under the state of dormancy S3 or shutdown S5 to realize computer, prevents the purpose that part of devices in the computer, chip burn out.
For achieving the above object, the utility model provides a kind of computer fan control circuit, this computer fan control circuit comprises: an activation voltage, a triode, a thermistor, a supply voltage, a diode, a fan, wherein: the emitter of this triode electrically connects the output terminal of above-mentioned activation voltage, the base stage of this triode connects an end of thermistor, the input end of the collector of this triode and the output terminal of diode and fan interconnects respectively, and whether this triode is used for the control circuit electric current and exports; The other end ground connection of this thermistor, the duty that it utilizes the resistance of variation of temperature change itself to change the size of electric current in the circuit simultaneously and then change triode; This diode, its input end connects supply voltage, and this diode is used to stop the current direction supply voltage that flows out from triode, plays anti-backflow; This fan, its minus earth.
Say that especially this computer fan control circuit also comprises: an electric capacity, an end of this electric capacity electrically connects the input end of said fans, and the other end is by the output head grounding of fan; Above-mentioned triode is the positive-negative-positive triode; This activation voltage is 5Vsb; This supply voltage is 10V-16V; Above-mentioned thermistor is a negative tempperature coefficient thermistor, and its rising resistance with temperature diminishes.
When the in running order S0 of computer, supply voltage is greater than activation voltage, and triode is in cut-off state like this, makes this fan operate as normal so the voltage that the fan two ends are connected with in the circuit is supply voltage;
When computer is in dormant state S3 or off-mode S5, supply voltage is 0, only remaining activation voltage provides voltage in the circuit, because activation voltage is greater than supply voltage, triode is in magnifying state, alive in the thermistor two ends, increase temperature rising along with the time, thereby the resistance of thermistor reduces can increase by the electric current at thermistor two ends, the electric current that flows to fan so also increases thereupon, the voltage that is connected with along with the increase fan two ends of electric current becomes big, and then reaches the workable voltage of fan, makes its operate as normal.
Compared to prior art, computer fan control circuit of the present utility model by increased by a thermistor, when a triode makes that computer is in dormant state S3 or off-mode S5, fan also can operate as normal, eliminated the heat that part of devices produces in the computer when aliving, so that these devices, chip is difficult is burnt out.
[description of drawings]
Fig. 1 illustrates the circuit diagram of known computer fan control circuit.
Fig. 2 illustrates the circuit diagram of computer fan control circuit of the present utility model.
[embodiment]
With reference to Fig. 2, it is the circuit diagram of computer fan control circuit of the present utility model.
Computer fan control circuit of the present utility model comprises: an activation voltage 1, triode 2, a thermistor 3, a supply voltage 4, a diode 5, a fan 6, an electric capacity 7, wherein:
This activation voltage 1 is 5Vsb;
The emitter of this triode 2 electrically connects the output terminal of above-mentioned activation voltage 1, the base stage of this triode 2 connects an end of thermistor 3, the input end of the output terminal of the collector of this triode 2 and diode 5 and fan 6 interconnects respectively, and whether this triode 2 is the positive-negative-positive triode, be used for the control circuit electric current and export;
The other end ground connection of this thermistor 3, the duty that it utilizes the resistance of variation of temperature change itself to change the size of electric current in the circuit simultaneously and then change triode 2, this thermistor 3 is a negative tempperature coefficient thermistor;
This diode 5, its input end connects supply voltage 4 (in present embodiment, this supply voltage 4 is 10V-16V), and this diode 5 is used to stop the current direction supply voltage 4 that flows out from triode 2, plays anti-backflow;
This fan 6, its minus earth;
This electric capacity 7, the one end connects the input end of fan 6, and the other end is by the output head grounding of fan 6, and this electric capacity 7 is used for stablizing the voltage at fan 6 two ends.
In present embodiment, above-mentioned diode 5 is used for when computer is in dormant state S3 or off-mode S5, stops the current direction supply voltage 4 that flows out from triode 2, and this diode 5 plays anti-backflow;
When the in running order S0 of computer, supply voltage 4 is greater than activation voltage 1, and triode 2 is in cut-off state like this, makes this fan 6 operate as normal so the voltage that fan 6 two ends are connected with in the circuit is supply voltage 4;
When computer is in dormant state S3 or off-mode S5, supply voltage 4 is 0, only remaining activation voltage 1 provides voltage in the circuit, because activation voltage 1 is that 5Vsb is greater than supply voltage 4, triode 2 is in magnifying state, alive in thermistor 3 two ends, increase temperature rising along with the time, thereby the resistance of thermistor 3 reduces can increase by the electric current at thermistor 3 two ends, the electric current that flows to fan 6 so also increases thereupon, the voltage that is connected with along with increase fan 6 two ends of electric current becomes big, and then reaches the operating voltage of fan 6, makes its operate as normal.
Claims (6)
1, a kind of computer fan control circuit is characterized in that, this computer fan control circuit comprises: an activation voltage, a triode, a thermistor, a supply voltage, a diode, a fan, wherein:
The emitter of this triode electrically connects the output terminal of above-mentioned activation voltage, the base stage of this triode connects an end of thermistor, the input end of the collector of this triode and the output terminal of diode and fan interconnects respectively, and whether this triode is used for the control circuit electric current and exports;
The other end ground connection of this thermistor, the duty that it utilizes the resistance of variation of temperature change itself to change the size of electric current in the circuit simultaneously and then change triode;
This diode, its input end connects supply voltage, and this diode is used to stop the current direction supply voltage that flows out from triode, plays anti-backflow;
This fan, its output head grounding;
When computer was in running order, supply voltage was greater than activation voltage, and triode is in cut-off state like this, made this fan operate as normal so the voltage that the fan two ends are connected with in the circuit is supply voltage;
When computer is in dormant state or off-mode, supply voltage is 0, only remaining activation voltage provides voltage in the circuit, because activation voltage is greater than supply voltage, triode is in magnifying state, alive in the thermistor two ends, increase temperature rising along with the time, thereby the resistance of thermistor reduces can increase by the electric current at thermistor two ends, the electric current that flows to fan so also increases thereupon, the voltage that is connected with along with the increase fan two ends of electric current becomes big, and then reaches the workable voltage of fan, makes its operate as normal.
2, computer fan control circuit as claimed in claim 1 is characterized in that, this computer fan control circuit also comprises: this activation voltage is 5Vsb.
3, computer fan control circuit as claimed in claim 1 is characterized in that, this computer fan control circuit also comprises: this supply voltage is 10V-16V.
4, computer fan control circuit as claimed in claim 1 is characterized in that, this computer fan control circuit also comprises: above-mentioned triode is the positive-negative-positive triode.
5, computer fan control circuit as claimed in claim 1 is characterized in that, this computer fan control circuit also comprises: an electric capacity, and an end of this electric capacity electrically connects the input end of said fans, and the other end is by the output head grounding of fan.
6, computer fan control circuit as claimed in claim 1 is characterized in that, this computer fan control circuit also comprises: above-mentioned thermistor is a negative tempperature coefficient thermistor, and its rising resistance with temperature diminishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200446012U CN201170865Y (en) | 2008-03-07 | 2008-03-07 | Control circuit for computer fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200446012U CN201170865Y (en) | 2008-03-07 | 2008-03-07 | Control circuit for computer fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201170865Y true CN201170865Y (en) | 2008-12-24 |
Family
ID=40209917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200446012U Expired - Fee Related CN201170865Y (en) | 2008-03-07 | 2008-03-07 | Control circuit for computer fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201170865Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052340A (en) * | 2009-10-28 | 2011-05-11 | 鸿富锦精密工业（深圳）有限公司 | Fan control circuit |
| CN102758786A (en) * | 2011-04-28 | 2012-10-31 | 鸿富锦精密工业（深圳）有限公司 | Fan circuit |
| CN104728147A (en) * | 2013-12-24 | 2015-06-24 | 鸿富锦精密工业(武汉)有限公司 | Control circuit of fan |
| CN105573372A (en) * | 2015-12-22 | 2016-05-11 | 广东欧珀移动通信有限公司 | Control method and apparatus of intelligent terminal |
-
2008
- 2008-03-07 CN CNU2008200446012U patent/CN201170865Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052340A (en) * | 2009-10-28 | 2011-05-11 | 鸿富锦精密工业（深圳）有限公司 | Fan control circuit |
| CN102758786A (en) * | 2011-04-28 | 2012-10-31 | 鸿富锦精密工业（深圳）有限公司 | Fan circuit |
| CN104728147A (en) * | 2013-12-24 | 2015-06-24 | 鸿富锦精密工业(武汉)有限公司 | Control circuit of fan |
| CN104728147B (en) * | 2013-12-24 | 2016-08-17 | 国家电网公司 | Fan control circuitry |
| CN105573372A (en) * | 2015-12-22 | 2016-05-11 | 广东欧珀移动通信有限公司 | Control method and apparatus of intelligent terminal |
| CN105573372B (en) * | 2015-12-22 | 2017-09-15 | 广东欧珀移动通信有限公司 | A kind of control method and device of intelligent terminal |
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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: 20081224 Termination date: 20150307 |
|
| EXPY | Termination of patent right or utility model |