Fan system for electronic device

Abstract

A fan system for dissipating heat generated in an electronic device includes a processor unit, a speedometer unit connected to the processor unit, a governor unit connected to the processor unit, and a fan group including at least two fans. Each fan is connected to the speedometer unit and the governor unit and has at least two motors. The processor unit controls all the motors to rotate and thereby drives all the fans to rotate through the governor unit, and detects rotation speeds of all the motors through the speedometer unit. When a motor malfunctions, the processor unit adjusts the rotation speeds of all other motors to ensure that the fan having the malfunctioning motor and other fans are respectively provided with equal power and then rotate in equal speeds.

1 . A fan system for dissipating heat generated in an electronic device, comprising:
 a processor unit;   a speedometer unit connected to the processor unit;   a governor unit connected to the processor unit; and   a fan group including at least two fans, each fan connected to the speedometer unit and the governor unit and having at least two motors; wherein the processor unit controls all the motors to rotate and thereby drive all the fans to rotate through the governor unit, and detects rotation speeds of all the motors through the speedometer unit; when a motor malfunctions, the processor unit adjusts the rotation speeds of all other motors to ensure that the fan having the malfunctioning motor and other fans are respectively provided with equal power and rotate in equal speeds.   
     
     
         2 . The fan system as claimed in  claim 1 , further comprising a thermograph unit connected to the processor unit, the thermograph unit measuring temperature in the electronic device and transmitting data of the temperature to the processor unit. 
     
     
         3 . The fan system as claimed in  claim 2 , wherein when temperature in the electronic device measured by the thermograph unit exceeds a predetermined value, the processor unit controls all the motors to rotate via the governor unit, and thus drives all the fans to rotate and generate wind power to dissipate unwanted heat. 
     
     
         4 . The fan system as claimed in  claim 3 , wherein the processor unit adjusts rotation speeds of all the motors through the governor unit according to temperature in the electronic device. 
     
     
         5 . The fan system as claimed in  claim 2 , further comprising a circuit board, wherein the processor unit, the speedometer unit, the governor unit, and the thermograph unit are all mounted on the circuit board, and the fan group is connected to the speedometer unit and the governor unit via the circuit board. 
     
     
         6 . The fan system as claimed in  claim 1 , wherein when the motor malfunctions, the processor unit adjusts the rotation speeds of all other motors of the fan having the malfunctioning motor to maximal values, and adjusts the rotation speeds of motors of other fans to ensure all the fans are respectively provided with equal power. 
     
     
         7 . The fan system as claimed in  claim 1 , wherein when a plurality of fans respectively have malfunctioning motors, the processor unit adjusts rotation speeds of all other motors to ensure all the fans are respectively provided with equal power.