Patent ID: 8900042

Claim:
A fan type temperature control method, comprising: a step of low temperature processing, in which when temperature t of an apparatus to be cooled is lower than a preset first temperature t1, circuits of all fans remain disconnected, and all the fans stop; a step of medium temperature processing, in which when the temperature t of the apparatus to be cooled is higher than the preset first temperature t1 and is lower than a preset second temperature t2, a voltage which is lower than a voltage of a power supply of a temperature control device is applied to all the fans, and all the fans rotate at a speed which is less than a maximum speed; and a step of high temperature processing, in which when the temperature t of the apparatus to be cooled is higher than a preset third temperature t3, the voltage of the power supply of the temperature control device is applied to all the fans, and all the fans rotate at full speed; wherein, t1<t2≦t3; and a fan control unit comprises three temperature detect switches and one diode, and the three temperature detect switches are a first temperature detect switch, a second temperature detect switch and a third temperature detect switch; one end of a first fan part is connected to an anode of a first power supply and the other end is connected to one end of the first temperature detect switch, the other end of the first temperature detect switch is connected to an anode of the diode, one end of a second fan part is connected to a cathode of the diode, and the other end of the second fan part is connected to a cathode of a second power supply; one end of the second temperature detect switch is connected between said first fan part and said first temperature detect switch, and the other end is connected to a cathode of the first power supply; one end of the third temperature detect switch is connected to the cathode of the diode, and the other end is connected to an anode of the second power supply; the first temperature detect switch is to be closed when the temperature t of the apparatus to be cooled is higher than the preset first temperature t1; the second temperature detect switch is to be closed when the temperature t of the apparatus to be cooled is higher than the preset second temperature t2; the third temperature detect switch is to be closed when the temperature t of the apparatus to be cooled is higher than the preset third temperature t3.