Patent ID: 8253078

Claim:
A temperature control circuit comprising: a microprocessor; a protection module connected to the microprocessor; a first temperature detecting module connected to the microprocessor and the protection module, and comprising a first thermistor and a first comparator connects to the first thermistor, wherein the first thermistor is operable to sense a temperature to make the first comparator output a first signal to the microprocessor and the protection module, the protection module is operable to control the microprocessor to work or reset according to the first signal; a second temperature detecting module connected to the microprocessor, and comprising a second thermistor and a second comparator connected to the second thermistor, wherein the second thermistor is operable to sense a temperature to make the second comparator output a second signal to the microprocessor; and a heating module comprising a heater, wherein the microprocessor controls the heater to work or stop working according to the first and second signals, respectively.