Computer fan control device

Abstract

The invention discloses a computer fan control device, which comprises a fan interface, a switch element and a fan control circuit, wherein the switch element comprises a control end and an earthed end, and the fan control circuit comprises an electronic switch, an integration circuit, an operational amplifier, a current controller, a first output end and a second output end. The computer fan control device detects the type of a computer fan according to the turning on and off of the switch element, integrates rotating speed control circuits of various fans, and can automatically select a proper circuit to control the rotating speed of the fan according to the detected type of the fan.

Description

technical field [0001] The invention relates to a computer fan control device. Background technique [0002] With the rapid development of computer technology, computer systems usually need to perform a large amount of calculation processing, and the heat generated when the task is busy is also gradually increasing. The heat dissipation problem cannot be solved by heat dissipation holes and heat sinks alone. Active heat dissipation equipment is more cost-effective The air-cooling technology has always been the most commonly used heat dissipation method for computer systems. However, although the fan is economical and practical, it also has many defects: as the speed increases, the noise generated by the fan during high-speed operation gradually increases; Not only will the service life of the fan be shortened, but the fan itself will also generate a lot of heat. [0003] If the fan can run at high speed when the system is busy, and reduce the speed or even stop when the sys...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of computer technology, computer systems usually need to perform a large amount of calculation processing, and the heat generated when the task is busy is also gradually increasing. The heat dissipation problem cannot be solved by heat dissipation holes and heat sinks alone. Active heat dissipation equipment is more cost-effective The air-cooling technology has always been the most commonly used heat dissipation method for computer systems. However, although the fan is economical and practical, it also has many defects: as the speed increases, the noise generated by the fan during high-speed operation gradually increases; Not only will the service life of the fan be shortened, but the fan itself will also generate a lot of heat

[0005] However, among the existing fans, only the 4Pin fan can realize the smart fan function through PWM, and the 3Pin fan cannot receive the PWM signal because there is no corresponding pin, so the 3Pin fan still needs to change its operating voltage to control the speed

[0006] At present, there are many motherboards that support smart fans on the market, but they all have a common defect, which is that they can only support one of the 3Pin or 4Pin fans.

In this way, for customers, the selection of fans brings inconvenience to them. Similarly, for manufacturers, due to the limitations of motherboards on fan types, different requirements are placed on the selection of fan connectors, which increases the difficulty of component procurement.

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