Patent ID: 7368688
Filing Date: 2008-05-06
Classification: H05B

Abstract:
1. An apparatus for sensing load of an electric cooker, comprising: a heater unit including an induction heating coil and an electric heater; a load-type determination unit that determines a type of a cooking vessel; a load-state determination unit that determines whether the cooking vessel is placed on top of the heater unit; a heater driving determination unit that determines whether to operate the induction heating coil or the electric heater in response to determination signals of the load-type determination unit and the load-state determination unit; a heater driving unit that operates the induction heating coil or the electric heater in response to a decision of the heater driving determination unit; and a resonance unit that allows a resonance current to flow into the induction heating coil when the heater driving unit operates the induction heating coil, wherein the load-type determination unit comprises: