Patent ID: 11910511
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An induction heating cooking apparatus comprising:
a plurality of heating coils including an inner circumferential coil provided on an innermost circumferential side, an outer circumferential coil provided on an outermost circumferential side, and an intermediate coil provided between the inner circumferential coil and the outer circumferential coil;
a supporting base provided below the plurality of heating coils, and configured to support the plurality of heating coils;
a plurality of inverter circuits each configured to supply high-frequency power to an associated one of the plurality of heating coils; and
a controller configured to control driving of the plurality of inverter circuits, and perform a heating operation in which a frequency of the high-frequency power to be supplied to the outer circumferential coil is increased higher than a frequency of the high-frequency power to be supplied to the inner circumferential coil, and a frequency of high-frequency current to be supplied to the intermediate coil is increased higher than a frequency of the high-frequency current to be supplied to the inner circumferential coil,
wherein the supporting base is formed in the shape of a flat plate and made of a nonmagnetic body, and includes a plurality of first openings formed in part of the supporting base that is located below the outer circumferential coil, and also a plurality of second openings formed in part of the supporting base that is located below the intermediate coil, and
wherein the first openings of the supporting base are notches extending radially inward from an outer circumferential edge, including a border, of the supporting base.