Patent ID: 7291813

Claim:
A controller for an electric article for human body, the controller controlling DC power supply to an electrically conductive heat-generating member in the electric article and being connected to a temperature-detecting wire of the electric article, the controller comprising: a voltage-stabilizing circuit for supplying voltage stable DC power; a microprocessor; a temperature-detecting circuit including a plurality of first comparators for detecting a plurality of temperature ranges, each said first comparator including a positive input connected to an associated one of a plurality of first voltage-dividing circuits of the voltage stable DC power, each said first comparator further including a negative input connected to a voltage-dividing end of a thermistor that is connected to the temperature-detecting wire, the first comparators being commonly connected to a temperature range switch; a protecting circuit including a second comparator for detecting a pre-set highest heating temperature, the second comparator being connected to the voltage stable DC power and a second voltage-detecting circuit of the voltage stable DC power, the second comparator further being connected to the voltage-dividing end of the thermistor; a control circuit connected to the microprocessor and an output of the second comparator of the protecting circuit; and a switch circuit connected to an output of the voltage stable DC power and the control circuit, thereby controlling conduction or cutting off DC power supply to the electric article, wherein the microprocessor includes software cooperating with a clock pulse oscillating circuit to provide a countdown for abnormal heating for cutting off DC power supply via the control circuit and the switch circuit.