CN105840538A - Fan system and fan control method - Google Patents
Fan system and fan control method Download PDFInfo
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- CN105840538A CN105840538A CN201510015908.4A CN201510015908A CN105840538A CN 105840538 A CN105840538 A CN 105840538A CN 201510015908 A CN201510015908 A CN 201510015908A CN 105840538 A CN105840538 A CN 105840538A
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- fan
- voltage
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- fans
- foot position
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Abstract
The invention provides a fan system and a fan control method. The fan system includes: a tripod fan which has a starting voltage; a starting circuit which outputs a first voltage greater than or equal to the starting voltage; a basic input and output system which outputs at least one second voltage less than the starting voltage; and a switching device which supplies the second voltage to the tripod fan when the fan normally operates, and switches the second voltage to the first voltage to be supplied to the tripod fan while receiving a trigger signal. According to the fan system and the fan control method, an operation voltage less than the starting voltage is supplied to the tripod fan, noise caused by high revolving speed of the fan can be reduced, and a comfortable environment can be supplied to a user.
Description
Technical field
The present invention is related to a kind of fan system and control method for fan, and particularly with regard to maintaining three feet
Position fan is in the fan system of low-voltage and control method for fan.
Background technology
Fan to be started needs to input a startup voltage, when after starting fan, allows the sustainable operating of fan
Voltage substantially can be less than starting voltage.But, traditionally in order to make fan in start after can continue not between
Operate disconnectedly, circuit design can make supply be not less than startup voltage to the minimum power supply voltage, of fan, keep away
Exempt from the situation occurring fan not rotate.For three foot position (3pin) fans, due to the rotating speed of fan
Can only be controlled by the height of the voltage of input, if the voltage of input must be always above starting voltage,
Then fan can only run up, and then brings the noise being likely to result in user puzzlement.
Summary of the invention
The present invention is to solve above-mentioned problem, and propose a kind of three foot position fans to be maintained in low-voltage
Fan system and control method for fan.
Fan system proposed by the invention, including: one or three foot position fans, there is a startup voltage；One
Start-up circuit, output one is more than or equal to the first voltage of this startup voltage；One basic input output system,
Output at least one is less than the second voltage of this startup voltage；And a switching device, when fan runs well
Time, by the supply of this second voltage to this three feet position fan, when receiving a triggering signal, switch this first
Voltage supplies to this three feet position fan.
According to one embodiment of the invention, this fan system is installed in a computer system, and this triggering signal is
The starting-up signal sent during this computer system boot-strap.According to one embodiment of the invention, this three feet position fan
A foot position be used to detect the rotating speed of this three feet position fan, this triggering signal can't detect rotation speed of the fan
Time output.According to one embodiment of the invention, this startup voltage is 3.6V, and this second voltage is more than 2V.
According to one embodiment of the invention, this switching device includes: a diode, it is basic that anode is connected to this
The voltage output end of input-output system, negative electrode is connected to the power supply pin of this three feet position fan；And one
Switch element, is connected between the negative electrode of this diode and the voltage output end of this start-up circuit.
Control method for fan proposed by the invention, in order to control one or three foot position fans, including: work as installation
During the system boot of this three feet position fan, it is provided that one more than or equal to the voltage that starts of this three feet position fan
One first voltage is to this three feet position fan；And when after fan running, it is provided that at least one less than this startup electricity
One second voltage of pressure is to this three feet position fan.
According to one embodiment of the invention, this control method for fan, also include: when detecting this fan and stopping,
There is provided this first voltage to this three feet position fan；And when detecting this fan running, it is provided that this second electricity
It is depressed into this three feet position fan.
According to one embodiment of the invention, in said fans control method, this startup voltage is 3.6V, and this
Two voltages are more than 2V.
As it has been described above, according to the fan system of various embodiments of the present invention and control method for fan, by providing
Three foot position fans are less than the operation voltage starting voltage, it is possible to lower because of higher brought the making an uproar of rotation speed of the fan
Sound, it is provided that the working environment that user is relatively comfortable.Also, in response in above-mentioned electric less than the operating starting voltage
Pressure is supplied to three foot position fans, it is impossible to get rid of the probability that fan can stop, in order to prevent three foot position fans
Cannot start when halted state, the present invention is also when start or when fan being detected without rotating speed, by three feet
The power supply pin of position fan switches to more than or equal to the supply voltage starting voltage, short by All other routes
Temporary power supply restarts fan.Therefore, the three foot position fans of the present invention can maintain fortune at lower voltages
Turn, even and if fan stop time also can by another provide high-tension circuit recover operating, Jin Erwei
Hold the kilter using this fan to carry out the product dispelled the heat.The fan system of the present invention and fan control side
Method solves noise and the possible problem stopped of operating simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the essential structure of the fan system showing the present invention.
Fig. 2 is the flow chart showing control method for fan according to a first embodiment of the present invention.
Fig. 3 is the flow chart showing control method for fan according to a second embodiment of the present invention.
Fig. 4 is the flow chart showing control method for fan according to a third embodiment of the present invention.
Fig. 5 is an enforcement kenel of the switching device showing Fig. 1.
Wherein, description of reference numerals is as follows:
1～fan system；
10～three foot positions fan (fan)；
20～start-up circuit；
30～basic input output system (BIOS)；
40～switching device；
D～diode；
OUT～outfan；
S～triggering signal；
SW～switch；
V1～the first voltage；
V2～the second voltage.
Detailed description of the invention
Graphic embodiments of the invention are described below by way of each.Fig. 1 is the fan system showing the present invention
The schematic diagram of essential structure.
As it is shown in figure 1, the fan system 1 of the present invention includes: three foot position fans (or being called for short fan) 10,
Start-up circuit 20, basic input output system (hereinafter referred to as BIOS) 30 and switching device 40.
Three foot position fans 10 have a power supply pin, grounding leg position, rotating speed reading foot position.Three foot position fans 10
There is a startup voltage Vs, three foot position fans 10 also can be allowed from the minimum voltage (example that starts running of stopping
Such as 3.6V).And the rotating speed of three foot position fans can only come by controlling the height of the voltage of input power foot position
Controlling, the highest input voltage can make fan produce the highest rotating speed.Start-up circuit 20 can export more than or
Equal to the first voltage V1 (such as 5V) of startup voltage Vs, it is used for starting three foot position fans of stopping
10.BIOS30 can export less than the second voltage V2 (such as 2～3V) starting voltage Vs, makes three
Foot position fan keeps slow-speed of revolution operating.Switching device 40 is selectively by the first voltage V1 and the second voltage
One of V2 supplies the power supply pin to three foot position fans 10.
The technical characteristic of the present invention is i.e. the voltage being used for making three foot position fans 10 start and is used for
The voltage making three foot position fan 10 operatings separates and controls, and then disengaging tradition is only supplied power supply by BIOS
Voltage so that voltage must be consistently higher than the restriction starting voltage Vs.Based on this design concept, need
Design one triggering signal S controls switching device 40 so that switching device 40 can trigger signal according to this
The voltage of the power supply pin of output to three foot position fans 10 is switched to the first voltage from the second voltage V2 by S
V1。
According to one embodiment of present invention, three foot position fans 10 need to be supplied to the feelings of the first voltage V1
When condition is system boot.This fan system 1 is such as installed in a PC, when PC is opened
During machine, need to start three foot position fans 10, (be probably with the object providing three foot position fans to install
CPU, display card or motherboard) heat sinking function.In that case, triggering signal S can be
Starting-up signal (such as, user pressing pulse signal produced by start button) during PC start.
Fig. 2 is the flow chart showing control method for fan according to a first embodiment of the present invention.Such as Fig. 2 institute
Showing, in step S201, user presses main frame (such as, the individual of the fan system being mounted with the present invention
Computer) start button by main frame start shooting.In step S202, main frame sends starting-up signal.In step S203,
When switching device 40 receives as the starting-up signal triggering signal S, just switch to start-up circuit 20
The power supply more than or equal to the first voltage V1 supply to three foot position fans 10 starting voltage Vs supplied
Foot position, starts fan.In step S204, switching device 40 judges whether that still receiving starting-up signal (opens
The length of machine signal can be preset according to the designer of device), if still receiving starting-up signal, maintain the first voltage
V1 powers, if not receiving starting-up signal, represents that main frame has been switched on (three foot position fans 10 also have been turned on),
Then enter step S205, switch to the second voltage less than startup voltage Vs supplied by BIOS30
V2 supply, to the power supply pin of three foot position fans 10, with slow-speed of revolution fans in operation, thus reduces fan fortune
Produced noise when turning.
According to another embodiment of the invention, three foot position fans 10 need to be supplied to the first voltage V1's
Situation is that fan is when shutting down.Owing to three foot position fans 10 of the present invention are supplied when running well
Voltage is less than starting voltage, and therefore fan still has the reasons such as the resistance by external environment to shut down
Situation occurs, and in order to avoid the second voltage V2 of BIOS30 supply is not enough to be again started up fan, needs inspection
Survey whether fan stops, if fan stops, sending triggering signal S and switch the first voltage V1 and again open
Wind symptom is fanned.
Fig. 3 is the flow chart showing control method for fan according to a second embodiment of the present invention.Such as Fig. 3 institute
Showing, in step S301, fan 10 is to be less than startup voltage Vs by supply by BIOS30 when operating
The second voltage V2 power.In step S302, read foot position from the rotating speed of three foot position fans 10 and read wind
The rotating speed of fan.In step S303, judge that fan 10, with or without rotation, turns if nothing receives according to tach signal
Speed signal represents that fan 10 is in halted state.In step S303, if finding, fan is still rotating, then
Return to step S302, continue the rotating speed of detection fan 10；Otherwise, if finding, fan does not rotate, then
Proceed to step S304.In step S304, fan can make triggering signal S export to switching dress without rotation
Put 40, make that switching device switches to be supplied start-up circuit 20 more than or equal to starting the of voltage Vs
One voltage V1 supply, to the power supply pin of three foot position fans 10, restarts fan.Can design one
The scheduled time after, enter step S305.In step S305, switching device 40 switches to BIOS30
The power supply pin less than the second voltage V2 supply to three foot position fans 10 starting voltage Vs supplied,
With slow-speed of revolution fans in operation, and return to step S302, again read off the rotating speed of fan 10.According to upper
The flow process stated, can positively avoid the situation that fan is not rotated further by after surprisingly stopping.
Also, according to another embodiment of the present invention, three foot position fans 10 can be when above-mentioned start and fan
The first voltage V1 all it is supplied to when abending.Thereby, it is possible to the advantage simultaneously meeting above-mentioned two embodiments.
Fig. 4 is the flow chart showing control method for fan according to a third embodiment of the present invention.Such as Fig. 4 institute
Showing, in step S401, user presses the start button of the main frame of the fan system being mounted with the present invention will be main
Machine is started shooting.In step S402, main frame sends starting-up signal.In step S403, when switching device 40 connects
Receive as the starting-up signal triggering signal S, just switch to being more than that start-up circuit 20 is supplied
Supply the power supply pin to three foot position fans 10 in the first voltage V1 starting voltage Vs, start wind
Fan.In step S404, switching device 40 judges whether still to receive the starting-up signal (length of starting-up signal
Can preset according to the designer of device), if still receiving starting-up signal, maintain the first voltage V1 to power, if
Do not receive starting-up signal, represent that main frame has been switched on (three foot position fans 10 also have been turned on), then enter step
Rapid S405, the second voltage V2 less than startup voltage Vs switching to be supplied BIOS30 supply extremely
The power supply pin of three foot position fans 10, with slow-speed of revolution fans in operation.After main frame boot program completes, then
Enter step S406, read foot position from the rotating speed of three foot position fans 10 and read the rotating speed of fan.In step
S407, according to tach signal judge fan 10 with or without rotation, if representing fan 10 without receiving tach signal
It is in halted state.In step S407, if finding, fan is still rotating, then return to step S406, continue
The rotating speed of continuous detection fan 10；Otherwise, if finding, fan does not rotate, then proceed to step S408.
In step S408, fan can make triggering signal S export to switching device 40 without rotation, make switching device
Switch to the first voltage V1 supply to the power supply pin of three foot position fans 10, thus restart fan.
After a programmable scheduled time, enter step S409.In step S409, switching device 40 switches
Return the power supply pin of the second voltage V2 supply to three foot position fans 10, with slow-speed of revolution fans in operation, and
Return to step S406, again read off the rotating speed of fan 10.
Fig. 5 is an enforcement kenel of the switching device 40 showing Fig. 1.As it is shown in figure 5, switching device
40 include: a diode D, and anode is connected to the second voltage V2 that BIOS30 is exported, and negative electrode is even
Meet the outfan OUT of switching device 40；And a switch element SW, it is connected to start-up circuit 20 institute
Between first voltage V1 and the outfan OUT of switching device 40 of output.When not triggering signal S
During input, switch SW opens (open), makes outfan OUT export the second voltage V2；Work as triggering
During signal S input, switch SW closes (close) makes the first voltage V1 export from outfan OUT,
Now, it is that inverse inclined state is not turned on due to the first voltage V1 more than the second voltage V2, diode D.
Above-mentioned structure is only a simple enforcement kenel of switching device 40, and the present invention is not limited to above-mentioned reality
Execute mode, switching device such as other switching devices, such as, MOSFET, relay (Relay),
The elements such as short circuit cap (Jump) are carried out.
According to the above embodiments, the fan system of the present invention and control method for fan, by providing three feet
Position fan is less than the operation voltage starting voltage, it is possible to lower because of higher the brought noise of rotation speed of the fan,
The working environment that user is relatively comfortable is provided.Also, carry less than the operation voltage starting voltage in response in above-mentioned
Supply three foot position fans, it is impossible to get rid of the probability that fan can stop, in order to prevent three foot position fans from stopping
Only cannot start during state, the present invention is more when start or when fan being detected without rotating speed, by three foot position wind
The power supply pin of fan switches to more than or equal to the supply voltage starting voltage, of short duration by All other routes
Power supply restarts fan.Therefore, the three foot position fans of the present invention can keep on the go at lower voltages,
Even and if also high-tension circuit can be provided to recover operating by another when fan stops, and then maintenance makes
The kilter of the product dispelled the heat is carried out with this fan.The fan system of the present invention and control method for fan are same
Time solve noise and operating may stop problem.
Though describing the enforcement kenel of the present invention above in detail, but the present invention being not limited to above-mentioned implementation type
State, as long as meeting the invention main idea described in claim of the present invention, the present invention include various deformation and
Change.
Claims (8)
1. a fan system, it is characterised in that including:
One or three foot position fans, have a startup voltage；
One start-up circuit, output one is more than or equal to the first voltage of this startup voltage；
One basic input output system, output at least one is less than the second voltage of this startup voltage；And
One switching device, when fan runs well, supplies this second voltage to this three feet position fan,
When receiving a triggering signal, switch this first voltage and supply to this three feet position fan.
2. fan system as claimed in claim 1, it is characterised in that wherein this fan system is installed on
In one computer system, this triggering signal is the starting-up signal sent during this computer system boot-strap.
3. fan system as claimed in claim 1, it is characterised in that wherein the one of this three feet position fan
Foot position is used to detect the rotating speed of this three feet position fan, and this triggering signal is when can't detect rotation speed of the fan
Output.
4. fan system as claimed in claim 1, it is characterised in that wherein this startup voltage is 3.6V,
And this second voltage is more than 2V.
5. fan system as claimed in claim 1, it is characterised in that wherein this switching device includes:
One diode, anode is connected to the voltage output end of this basic input output system, and negative electrode is connected to
The power supply pin of this three feet position fan；And
One switch element, is connected between the negative electrode of this diode and the voltage output end of this start-up circuit.
6. a control method for fan, in order to control one or three foot position fans, it is characterised in that including:
When installing the system boot of this three feet position fan, it is provided that one more than or equal to this three feet position fan
Start one first voltage of voltage to this three feet position fan；And
When after fan running, it is provided that at least one is less than one second voltage of this startup voltage to this three feet position wind
Fan.
7. control method for fan as claimed in claim 6, it is characterised in that also include:
When detecting this fan and stopping, it is provided that this first voltage is to this three feet position fan；And
When detecting this fan running, it is provided that this second voltage is to this three feet position fan.
8. control method for fan as claimed in claim 6, it is characterised in that wherein this startup voltage is
3.6V, and this second voltage is more than 2V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015908.4A CN105840538B (en) | 2015-01-13 | 2015-01-13 | Fan system and control method for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015908.4A CN105840538B (en) | 2015-01-13 | 2015-01-13 | Fan system and control method for fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105840538A true CN105840538A (en) | 2016-08-10 |
| CN105840538B CN105840538B (en) | 2018-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510015908.4A Active CN105840538B (en) | 2015-01-13 | 2015-01-13 | Fan system and control method for fan |
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Citations (6)
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| CN1570759A (en) * | 2003-04-03 | 2005-01-26 | 三洋电机株式会社 | Liquid crystal projector |
| CN2829184Y (en) * | 2005-09-02 | 2006-10-18 | 上海环达计算机科技有限公司 | Power supply changeover device for fan of power suppier |
| US20070258805A1 (en) * | 2006-05-02 | 2007-11-08 | Delta Electronics Inc. | Fan systems |
| US20070292257A1 (en) * | 2006-06-15 | 2007-12-20 | Ghee Beng Ooi | Apparatus and method to provide reduced fan noise at startup |
| CN202468483U (en) * | 2011-12-30 | 2012-10-03 | 深圳市迈乐数码科技股份有限公司 | Secondary voltage circuit for lowering fan noise |
| CN103225619A (en) * | 2012-01-30 | 2013-07-31 | 建准电机工业股份有限公司 | Fan rotating speed control method and device |
-
2015
- 2015-01-13 CN CN201510015908.4A patent/CN105840538B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570759A (en) * | 2003-04-03 | 2005-01-26 | 三洋电机株式会社 | Liquid crystal projector |
| CN2829184Y (en) * | 2005-09-02 | 2006-10-18 | 上海环达计算机科技有限公司 | Power supply changeover device for fan of power suppier |
| US20070258805A1 (en) * | 2006-05-02 | 2007-11-08 | Delta Electronics Inc. | Fan systems |
| US20070292257A1 (en) * | 2006-06-15 | 2007-12-20 | Ghee Beng Ooi | Apparatus and method to provide reduced fan noise at startup |
| CN202468483U (en) * | 2011-12-30 | 2012-10-03 | 深圳市迈乐数码科技股份有限公司 | Secondary voltage circuit for lowering fan noise |
| CN103225619A (en) * | 2012-01-30 | 2013-07-31 | 建准电机工业股份有限公司 | Fan rotating speed control method and device |
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| Publication number | Publication date |
|---|---|
| CN105840538B (en) | 2018-08-03 |
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