Fan module and its controller

Abstract

In the invention, the fan module consists of a plurality of fans and a control unit. The control unit includes a temperature-sensing circuit for sensing the environmental temperature of the fans and producing a sensing signal and a drive circuit connected electrically between the fans and the temperature-sensing circuit having a full power operator scheme and an electricity-saving operator scheme. According to the sensing signal, the drive circuit can choose the different operator scheme, so as to produce a fan drive signal for controlling the different rotating speeds of the fans.

Description

technical field [0001] The invention relates to a fan module and its control device, in particular to a control device capable of regulating the rotational speed of each fan according to the load, and a fan module provided with the control device. Background technique [0002] With the advancement of technology, the number of electronic components per unit area of ​​the electronic device is increasing, resulting in a corresponding increase in the heat generated by the electronic device during operation. Therefore, in order to maintain the electronic device at an effective working temperature, the current practice is to use an external fan to deal with the heat consumption. And because different electronic device casings have different volumes and the number of built-in components, the existing medium and large electronic devices require a large amount of heat dissipation, so at least two sets of additional fans are required to dissipate heat. Currently, the most common exte...

AI Technical Summary

Problems solved by technology

[0004] Furthermore, the above two fan modules 2, 3 can be built with a temperature sensing component, when the temperature changes, a control device in the two fan modules 2, 3 can output a control signal to a plurality of fans correspondingly, And make these multiple fans increase or decrease their own rotating speed, and the relationship between the temperature and rotating speed of the two kinds of fan modules 2, 3 is as follows: Figure 2A and 2B shown, among them, in Figure 2A Among them, the relationship between the speed and temperature is a linear change, that is, with the gradual increase of temperature (temperature t 1 to temperature t 2 ), the speed of the multiple fans also increases synchronously (speed r 1 to speed r 2 ), but in actual operation, the change of temperature and speed cannot be completely "linear", because of the influence of some noise, the slope should be slightly downward or upward, so the control sensitivity is not good; in addition, in Figure 2B In the change end of the speed, it depends on whether the temperature exceeds the critical temperature t 3 , if the critical temperature t is exceeded 3 Then the speed of the multiple fans is immediately changed by the speed r 1 Ramp up sharply to speed r 2 , but this kind of control method will shorten the service life of the mechanism if it is used in an electronic device with a large load due to the sudden increase or decrease of the speed, and it is not a good method.

Images