Patent ID: 7038179

Claim:
An electric oven, comprising: a casing to form a cooking cavity; a heater heating unit having a heater coil embedded in the casing, to heat food placed inside the cooking cavity using an electric heater; an induction heating unit to heat the food using a high-frequency current; and a programmable computer processor to control the heater heating unit and the induction heating unit according to a cooking mode, wherein: the programmable computer processor drives the heater heating unit and the induction heating unit simultaneously if the cooking mode is a preheating cooking mode to increase an inner temperature of the cooking cavity; the heater heating unit comprises an electric heater drive unit to apply drive current to the heater coil; and the induction heating unit comprises a working coil embedded in different places around the cooking cavity of the casing and a high-frequency current generation unit to apply high-frequency current to the working coil.