Method and system for controlling fan, and electronic device employing method

A fan control system comprising:

• a plurality of fans arranged in a plurality of working areas;
• and
• a control device configured to control the plurality of fans;
• wherein the control device comprises a pulse width modulation (PWM) controller, the control device is configured to preset a plurality of fan operation frequencies, each of the plurality of fan operation frequencies corresponds to different working areas, the control device is further configured to receive a fan operation request and adjust a frequency of the PWM controller to a first objective frequency based on the fan operation request, the first objective frequency is one of the plurality of fan operation frequencies, the control device is further configured to send the first objective frequency to the plurality of fans, a fan arranged in a first objective working area is drove to run based on the first objective frequency, and the first objective working area is one of the plurality of working areas corresponding to the first objective frequency.

An electronic device comprising:

• a pulse width modulation (PWM) controller;
• a plurality of fans arranged in a plurality of working areas;
• at least one processor;
• and
• a data storage storing one or more programs which when executed by the at least one processor, cause the at least one processor to:
• preset a plurality of fan operation frequencies, wherein each of the plurality of fan operation frequencies corresponds to different working areas;
• receive a fan operation request and adjust a frequency of the PWM controller to a first objective frequency based on the fan operation request, wherein the first objective frequency is one of the plurality of fan operation frequencies;
• and
• send the first objective frequency to the plurality of fans to drive a first fan of the plurality of fans to run, wherein the first fan is arranged in a first objective working area, and the first objective working area is one of the plurality of working areas corresponding to the first objective frequency.