CN2842513Y

CN2842513Y - Power-supply device fan

Info

Publication number: CN2842513Y
Application number: CNU200520129783XU
Authority: CN
Inventors: 林君儒
Original assignee: Enermax Technology Corp
Current assignee: Enermax Technology Corp
Priority date: 2005-10-19
Filing date: 2005-10-19
Publication date: 2006-11-29
Anticipated expiration: 2015-10-19

Abstract

A kind of power supply unit fan, this fan is positioned at the either side of supply body, it controls rotating speed according to the pulse wave signal that the PWM plug of the motherboard at CPU (central processing unit) place provides, and comprise at least: a framework, a flabellum and one drive circuit, and it mainly is: this driving circuit is to do an electric connection with the PWM plug, and the pulse wave signal of exporting by this plug control flabellum rotating speed, in view of the above, make flabellum in time heighten according to cpu temperature or reduce rotating speed, the inner member strong point of avoiding supply is in the temperature range near the upper limit.

Description

The power supply unit fan

Technical field

The utility model provides a kind of power supply unit fan, refers to that especially a kind of PWM of utilization (Pulse WidthModulation) signal of being exported controls the fan of flabellum rotating speed.

Background technology

Along with the computer system treatment efficiency from strength to strength, so that power supply unit is regular is positioned at and complete carry state and produce surprising high temperature, therefore, general power supply unit must consider that in the design phase can its inner member (as: transistor etc.) bear the high temperature that is produced when it carries state entirely; Yet, the supply structure can't solve the high temperature that self produced at all at present, so that inner member is difficult to adapt to so high temperature, lower the temperature and must be dependent on fan-type heating radiator (hereinafter to be referred as fan), see through the air-flow that its flabellum rotation is produced, absorb the inner heat energy that produces of supply, make it must be cooled to the acceptable temperature range of inner member.

In general, the frequency of processor (CPU) is fast more, required power supply is many relatively more, and therefore, the rotation speed of the fan of supply needs high more, just can make its internal temperature be unlikely overheated, the higher noise decibel (dB) that produces but high rotating speed is bound to, therefore, for reaching the optimum balance effect of noise and radiating effect, the speed setting of general fan only needs the supply internal temperature is reduced to the acceptable temperature range of inner member, and makes the supply body obtain the most basic cooling and low noise; But, when the supply internal temperature is near the scope of ceiling temperature for a long time, though be unlikely to its inner member is burnt, but can influence the physical property of its life-span and this inner member etc., if, when general flabellum of flabellum setting rotating speed was high, though can effectively reduce the chance of supply internal temperature near the upper limit, the noise that it produced certainly will can be higher than the fan of general rotating speed.

Therefore, the radiating fan rotation speed that how to make power supply unit must cooperate CPU (central processing unit) actual temperature and heighten in good time or reduce rotating speed, the problem of studying intensively for the utility model.

Novel content

The utility model fundamental purpose is to provide a kind of power supply unit fan, it controls rotation speed of the fan by the pulse width modulation signal that motherboard produced, it can in time be heightened according to cpu temperature or turn down rotating speed, avoid the inner member of supply to be near upper temperature limit for a long time.

For achieving the above object, a kind of power supply unit fan of the utility model comprises:

One is used for the alternating current of input is given step-down rectifier for being suitable for the direct current supply body of voltage by its inner inner member; And

One fan is positioned on the supply body, and this fan comprises: a framework and a flabellum; It is characterized in that: this fan has one and is used for the received pulse signal and controls the driving circuit of this electric fan rotating speed according to its shared cycle ratio; And the conduction of the pulse width modulation Signal plug on this driving circuit and this motherboard links together.

Wherein, this driving circuit comprises that one is used for heightening or turning down according to the shared cycle ratio in pulse wave work time zone the rotating-speed control circuit of this electric fan rotating speed.

Wherein, include and be used to make the full rotating speed of electric fan and this pulsed operation time zone to account for corresponding rotating-speed control circuit of cycle 100%.

Wherein, described driving circuit links together with the modulating signal plug conducting that is used for modulating according to the CPU (central processing unit) temperature inside PM signal of exporting.

In view of the above, the utlity model has and in time to heighten according to cpu temperature or turn down rotating speed, avoid the inner member of supply to be in beneficial effect for a long time near upper temperature limit.

According to above-mentioned purpose, lift preferred embodiment now and cooperate graphic technological means and the effect thereof that the utility model adopts that be illustrated.

Description of drawings

Fig. 1: be the three-dimensional combination figure of the utility model power supply unit fan;

Fig. 2: the block schematic diagram that the motherboard of the utility model power supply unit fan is connected with fan;

Fig. 3: 90% the waveform synoptic diagram that accounts for the cycle for the pulse wave signal of the utility model power supply unit fan; And

Fig. 4: be the cooperation synoptic diagram of the utility model power supply unit pulse wave signal and rotation speed of the fan.

Embodiment

See also Fig. 1, the pulse wave signal that the block schematic diagram that Fig. 1 is connected with fan for the motherboard of the utility model power supply unit for the three-dimensional combination figure of the utility model power supply unit fan, Fig. 2 and Fig. 3 are the utility model power supply unit fan accounts for 90% the waveform synoptic diagram in cycle.

As shown in the figure, power supply unit fan of the present utility model is to control its rotating speed height according to the wave width modulating signal that the motherboard arteries and veins produces, and comprises: a supply body 10 and a fan 20; Wherein the supply body 10, be will input alternating current (civil power), give step-down and rectification for being suitable for the direct current of voltage by its inner member, and this supply body 10, be located at the inside of computer chassis, and the one side exposes the outside (not shown) of casing, for input AC;

And be located at fan 20 on the supply body 10, be the heat energy in order to produce air-flow and to absorb and produced when taking away 10 runnings of supply body, and this fan 20 comprises at least: a hollow frame 21, a flabellum 22 and are in order to drive the driving circuit 23 of flabellum 22; Wherein, hollow frame 21 is provided with the pedestal of a tool axis of centres, uses for flabellum 22 to articulate, and makes flabellum 22 driven by driving circuit 23 and rotate (not shown) on base-plates surface; And of the present utility modelly mainly be: the PWM plug M1 that is possessed on this driving circuit 23 and the motherboard M makes a conduction and is connected, and the work time zone of looking the pulse wave signal of motherboard M generation accounts for C ratio complete cycle, and the rotating speed (as shown in Figure 3) of the flabellum 22 of control fan 20 is near upper temperature limit for a long time with the inner member of avoiding supply body 10, and influences its life-span and physical property thereof.

Consult Fig. 3 and Fig. 4 once more, Fig. 4 is that the utility model power supply unit rotation speed of the fan and pulse wave cooperate synoptic diagram.

According to the utility model power supply unit fan, wherein this driving circuit 23 comprises a rotating-speed control circuit 231, account for the ratio in cycle according to pulse wave signal work time zone, select whether to heighten flabellum 22 rotating speeds, in more detail, when computer system boot-strap and CPU when beginning computing, flabellum 22 promptly turns round with rated speed (predefined fixed rotating speed), at this moment, the rated speed of setting only need reach this supply body 10 basic radiating effects, and the minimum level of noise that obtains; And when computer CPU is carried out 3D computing or recreation, supply body 10 is for cooperating CPU when carrying state entirely, need the rotating speed of rising electric fan 22, make the effective increase of radiating effect of supply body 10 inside and avoid its internal temperature to raise, be to decide according to the pulse wave that motherboard produces, when cpu temperature is high more, the ratio that the work time zone of pulse wave signal accounts for C complete cycle is then big more, for example: when the temperature of CPU during greater than 65 ℃, the magnitude of voltage that motherboard then provides according to CPU and the work time zone of generation accounts for the pulse wave signal of whole cycle C 100%; And when cpu temperature was positioned at 60 ℃～64.99 ℃ scope, motherboard M produced about 95% the pulse wave signal (as shown in Figure 3) that the work time zone accounts for whole cycle C equally according to the voltage of CPU, and the rest may be inferred; And rotating-speed control circuit 231 mainly is work time zone according to pulse wave when reaching which degree, need to increase how many rotating speeds, that is, when rotating-speed control circuit 231 set the first scope F1 be the work time zone of pulse wave signal account for cycle C 20～40% between, flabellum 22 rotating speeds promptly accelerate to (as shown in Figure 4) between 3000rpm/min～4000rpm/min with linear mode; And when rotating-speed control circuit 231 set the second scope F2 be the work time zone of pulse wave signal be cycle C 40%～60% between, flabellum 22 promptly accelerates between 4000rpm/min～5000rpm/min with linear mode, and when the work time zone of pulse wave signal surpasses 60% ratio, flabellum 22 is that linearity accelerates to full rotating speed (rotating speed of fan upper limit (UL)), in view of the above, motherboard M just can adjust flabellum 22 rotating speeds according to the pulse wave signal that the cpu temperature height is produced, the noise that not only can make fan 20 produce is reduced to minimum and can in time be improved its flabellum rotating speed and the power consumption of fan 20 can be reduced to minimum, more effectively promotes serviceable life of supply body 10 inner members.

Advantage of the present utility model is: by the pulse wave signal that produces on the motherboard, decide electric fan whether to heighten or reduce rotating speed, make the power supply unit fan in time adjust its rotating speed according to the central processing unit internal temperature, in view of the above, not only make the inner member of supply body be cooled to optimum temperature, produce level of noise in the time of more flabellum can being rotated and reduce to minimum.

But the above only is a preferred embodiment of the present utility model, is not to be used for limiting the scope that the utility model is implemented.So and all equalizations of doing according to described shape structural attitude of the utility model claim and spirit change and modify, and should be contained in the claim of the present utility model.

Claims

1. power supply unit fan comprises:

One fan is positioned on the supply body, and this fan comprises: a framework and a flabellum; It is characterized in that: this fan has one and is used for the received pulse signal and controls the driving circuit of this electric fan rotating speed and the conduction of the pulse width modulation Signal plug on this driving circuit and this motherboard links together according to its shared cycle ratio.

2. according to the described power supply unit fan of claim 1, it is characterized in that: this driving circuit comprises that one is used for heightening or turning down according to the shared cycle ratio in pulse wave work time zone the rotating-speed control circuit of this electric fan rotating speed.

3. according to claim 1 or 2 described power supply unit fans, it is characterized in that: include and be used to make the full rotating speed of electric fan and this pulsed operation time zone to account for corresponding rotating-speed control circuit of cycle 100%.

4. according to the described power supply unit fan of claim 1, it is characterized in that: described driving circuit links together with the modulating signal plug conducting that is used for modulating according to the CPU (central processing unit) temperature inside PM signal of exporting.