Patent ID: 9265094
Filing Date: 2016-02-16
CPC Classification: H05B

Claim Text:
1. An induction cooking device comprising: atop plate; a first heating coil in a first heating area subjected to boiling-over detection on the top plate and a container placed on first heating area of the top plate; a second heating coil in a second heating area not subjected to boiling-over detection on the top plate and configured to heat a container placed on the second heating area of the top plate; a first inverter control portion adapted to supply a high-frequency electric current to the first heating coil and to control a heating output; a second inverter control portion adapted to supply a high-frequency electric current to the second heating coil and to control a heating output of the second heating coil such that the heating output reaches a set value; a heating-information detection portion adapted to detect heating information about the second heating coil; one or more electrodes on a lower surface of the top plate and near an outer peripheral portion of the first heating coil; a high-frequency signal generating portion adapted to supply a high-frequency signal to each of the one or more electrodes; and a boiling-over detection adapted to determine a capacitance in each of the one or more electrodes, to detect an occurrence of boiling over from the container being heated by the first heating coil when the capacitance in one of the electrodes changes by an amount equal to or more than a predetermined value, and to perform a heating-output suppression operation for reducing the heating output of the first heating coil or stopping a heating operation through the first inverter control portion, on detecting the occurrence of boiling over; wherein the boiling-over detection portion is adapted to be prohibited from performing the heating-output suppression operation for a first predetermined time period, when the boiling-over detection portion detects that a setting of the heating output of the second heating coil changes by a change width equal to or more than a predetermined value based on the heating information about the second heating coil from the heating-information detection portion; and the boiling-over detection portion is further adapted to be prohibited from performing the heating-output suppression operation, when the boiling-over detection portion detects boiling over, and when the heating-information detection portion detects that the input electric current from the second inverter control portion changes by a change width equal to or more than a predetermined value, based on information from the input-current detection portion.