Patent ID: 9462639
Filing Date: 2016-10-04
CPC Classification: H05B,Y02B

Claim Text:
1. An induction heating cooker comprising: a top plate configured to support a cooking container; a heating coil under the top plate, and configured to heat the cooking container by induction; an inverter configured to supply a high-frequency current to the heating coil; an electrode on a back surface of the top plate in proximity to a circumference of the heating coil; an electrostatic capacitance detecting portion configured to supply a high-frequency current to the electrode and sensing electrostatic capacitance of the electrode; a memory portion that stores a reference value for measuring a variation of the electrostatic capacitance; a control portion that controls an output of the inverter so that the output has a first set value set by an output setting portion; and a boiling over detecting portion configured to switch to a second set value lower than the first set value where a sensed value of the electrostatic capacitance with respect to the reference value is in a first variation range or more, and where the output of the inverter is set at the first set value, wherein the boiling over detecting portion returns the output of the inverter to the first set value where the sensed value is within a second variation range during a boiling over establishing period set after the sensed value is within the first variation range or more and subsequently transitions to within the second variation range, where the second variation range is lower than the first variation range.