Fan combination and fan speed-governing method

Abstract

The invention discloses a speed regulation method for a fan. Wherein, acquiring the lowest and highest rotation speed of fan as well as opposite chip temperature to determine the variation relation between speed and temperature; when need, obtaining current chip temperature to determine fan rotation speed according to said relation. It also discloses a fan combination, which comprises a single board with chip, a heat sink on chip, a fan fixed on said sink, and a temperature sensor on said board. This invention not only solves heat dissipation problem of board well, but also overcomes the noise and dust difficulty.

Description

technical field [0001] The invention relates to heat dissipation technology in the field of electronics or communication technology, in particular to a fan combination and a fan speed regulating method. Background technique [0002] Today's communication or electronic equipment is becoming more and more complex and highly integrated, which makes the power consumption of the equipment more and more large. In a fixed space, the substantial increase in power consumption has brought great challenges to the heat dissipation of the system. Usually, when natural heat dissipation cannot meet the requirements, fans need to be added to force air cooling to dissipate heat. However, adding a fan will cause new problems, that is: the noise of the equipment will increase with the increase of the fan speed, and at the same time, the amount of dust entering and leaving the equipment will also increase. It can be seen that the relationship between equipment noise, dustproof and heat dissipa...

AI Technical Summary

Problems solved by technology

In addition, changes in device configuration may also cause changes in board temperature

For example, when a board with high power consumption is added due to equipment expansion, the heat emitted by the board will cause the operating temperature of the board in the adjacent slot to rise

[0008] Moreover, the speed regulation method based on the ambient temperature in the prior art cannot perceive the change of the temperature of the single board inside the device because the temperature sensor is placed at the air inlet of the device.

At this time, if the external ambient temperature remains unchanged, the speed of the fan will remain unchanged, so that the temperature of the board that rises cannot be cooled, which may affect the reliable operation of the board; and when the temperature of the board drops, the fan cannot be adjusted accordingly. speed for low noise and dust ingress

In addition, when the configuration of the board inside the device changes, the air duct resistance changes accordingly, which in turn leads to a change in the wind speed received by the board, thus affecting the adjustment effect of the fan

[0009] 2. When the equipment runs for a period of time, the dust-proof net will be blocked to a certain extent. If the fan speed remains unchanged, the air volume entering the equipment will be reduced due to the blockage of the dust-proof net, which will cause the internal temperature of the equipment to rise, and then Affects the reliable operation of the board

[0010] To sum up, the fan speed regulation method based on the ambient temperature in the prior art cannot dynamically adjust the fan speed with the change of the board temperature, and thus cannot adjust the relationship between heat dissipation, noise and dust resistance of the device to the best state

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