Patent ID: 7781991

Claim:
A heat dissipation system used in an electronic device, the system comprising: a plurality of fans positioned in the electronic device; a sensing module configured for detecting temperature, relative humidity, and air pressure of airflow flowing in the electronic device; and a processing module configured for adjusting a voltage applied to each of the plurality of fans according to the detected temperature, relative humidity, and air pressure of the airflow, wherein the voltage applied to each of the plurality of fans satisfies the formula: V Fan = K × Q Fan ⁢ . spec × I system × P a P 0 × T 0 T a × S a S 0 × J Fan ⁢ × 1 Q Fan ⁢ . spec × V Fan . spec , where Ta is the temperature sensed by the temperature sensing unit; Pa is the air pressure sensed by the air-pressure element; Sa is the relative humidity sensed by the relative-humidity sensing unit; K is a constant; Isystem is flowed impedance inside the electronic device; P 0 is a reference atmosphere pressure; T 0 is a reference temperature; S 0 is a reference relative humidity; JFan is a ratio of amount of air exhausted by the fan to total amount of air exhausted by the plurality of fans; QFan.spec is amount of air specified in specification of each of the plurality of fans; VFan.spec is a corresponding operating voltage specified in a specification of each of the plurality of fans.