this article relates to the cooling fan of the computer host, in particular to a remote control cooling fan of the computer host which can be remotely controlled from outside and can automatically control the fan speed according to the changes of different temperatures.

in order to dissipate the heat generated during operation, the mainframe of a general computer is usually equipped with one or more heat dissipation fans in the chassis.when the computer works, the temperature in the chassis can be lowered to maintain the normal operation of the computer.since the fans of the mainframe of the computer are all fixed design, can't adjust its different speed with temperature change, more can't be controlled by the outside. Therefore, the conventional fan can only rotate continuously after the computer is turned on, which not only consumes electricity but also may reduce its service life due to continuous high-speed operation.it is really not ideal 。

the main purpose of this paper is to provide a remote control heat dissipation fan for computer mainframe, which can be controlled by the outside and can reasonably control the rotating speed of the fan according to the change of its internal temperature, so that the fan can save more electricity, reduce the noise of the fan and prolong its service life.

in order to achieve the above purpose, the remote control heat dissipation fan of the computer host in this paper is mainly provided with a microprocessor in the computer host, which is respectively connected to a speed detection control loop and a speed control loop, and these loops are connected to different system fans and CPU wind

the microprocessor is also connected with an external remote controller and a remote control device.after a signal is emitted by the external remote controller and received by the remote control device, the on/off and rotation speed of each fan are automatically controlled. Wherein, the microprocessor is connected with an A/D converter and a CPU a temperature sensing circuit, which detects the temperature change of the CPU and automatically adjusts and controls the rotating speed of each radiating fan according to the temperature change.

the microprocessor is also connected with a key, an LCD drive circuit and an LCD display, and the LCD display is arranged in front of the casing of the computer host, and the action of the heat dissipation fan can be set by an external key.

because the microprocessor is connected with an external remote controller and a remote control device, and signals are transmitted by the external remote controller and received by the remote control device, the opening and closing and rotating speed of each heat dissipation fan can be automatically adjusted, so that the computer host is more practical and humanized 。

in addition, the remote control fan of the computer host is also connected with an A/D converter and a CPU temperature sensing circuit, and the sensing circuit detects the temperature change of the CPU, and according to the temperature change, the rotating speed of each heat dissipation fan can be automatically adjusted and controlled, so that the computer host can save electricity and improve the heat dissipation wind fan service life.

in addition, the microprocessor of the remote control heat dissipation fan of the computer host is connected with a key, an LCD drive circuit and an LCD display, and the LCD display is arranged in front of the shell of the computer host, and can be externally pressed by key to set the action of the cooling fan makes the whole computer more practical.