Patent ID: 6355912
Filing Date: 2002-03-12
Classification: H05B

Abstract:
A heating appliance comprising:a heating element; and a control circuit, the control circuit being coupled to the heating element for monitoring a condition of the heating element and selectively applying power to the heating element in accordance with the monitored condition, wherein the control circuit includes: a voltage detector, the voltage detector detecting a voltage of the heating element, the voltage in relation to a threshold voltage being indicative of a normal or faulty condition of the heating element; a first switching device, the first switching device providing power to the heating element when the first switching device is in a first state and removing power from the heating element when the first switching device is in a second state; and a second switching device, the second switching device being coupled to the voltage detector and the first switching device and controlling the first switching device to be in the first state when the detected voltage indicates that the heating element is in the normal condition and controlling the first switching device to be in the second state when the detected voltage indicates that the heating element is in the faulty condition.