Patent ID: 7129449
Filing Date: 2006-10-31
Classification: H05B,Y02B

Abstract:
1. An induction heating cooker comprising: a heating coil, having an opening at center, for providing a load pot with induction heating; an inverter circuit for supplying a high-frequency current to the heating coil; an infrared sensor, disposed under the opening, for sensing an intensity of an infrared ray radiated from the load pot; a temperature calculating unit for calculating a temperature of the load pot based on an output from the infrared sensor; a control unit for controlling an output from the inverter circuit in response to an output from the temperature calculating unit; a first magnetism-proofing unit, disposed under the heating coil, for converging magnetic fluxes; a second magnetism-proofing unit, disposed between an inner rim of the heating coil and the infrared sensor, for converging magnetic fluxes; and a waveguide, disposed lower than an upper surface of the second magnetism-proofing unit, for guiding an infrared ray radiated from the load pot to the infrared sensor.