Patent ID: 8097835

Claim:
A temperature control circuit used in an electronic device, the temperature control circuit comprising: a microprocessor; a protection module connected to the microprocessor; a temperature detecting module comprising a thermistor and a first switch, wherein the thermistor is operable to sense a temperature of the electronic device and turn on or off the first switch for outputting a detection signal to the microprocessor and the protection module, the protection module is operable to output a control signal according to the detection signal, the microprocessor is controllable to be in a work state or a standby state according to the control signal from the protection module; and a heating module comprising a heater, wherein the microprocessor turns on or off the heater according to the detection signal, when the temperature of the electronic device is lower than a preset operating temperature, the first switch is turned on by the thermistor to make the protection module control the microprocessor to be in a standby state wherein the electronic device is deactivated and the heater is turned on; when the temperature of the electronic device is higher than the preset operating temperature, the first switch is turned off to control the microprocessor to enter the work state wherein the electronic device is activated and the heater is turned off.