US 11,818,824 B2
Induction heating cooking apparatus
Hayato Yoshino, Tokyo (JP); Jun Bunya, Tokyo (JP); Takeshi Iida, Tokyo (JP); and Ikuro Suga, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 16/967,570
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Feb. 23, 2018, PCT No. PCT/JP2018/006696
§ 371(c)(1), (2) Date Aug. 5, 2020,
PCT Pub. No. WO2019/163089, PCT Pub. Date Aug. 29, 2019.
Prior Publication US 2021/0227645 A1, Jul. 22, 2021
Int. Cl. H05B 6/06 (2006.01); H05B 6/12 (2006.01)
CPC H05B 6/065 (2013.01) [H05B 6/1245 (2013.01); H05B 6/1272 (2013.01); H05B 2213/05 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An induction heating cooking apparatus, comprising:
a plurality of heating coils aligned in at least one row on a flat surface;
a plurality of inverter circuits each configured to supply a high-frequency current to a corresponding one of the plurality of heating coils;
a material determiner configured to determine a material forming a heating target loaded on an upper part of each of the plurality of heating coils; and
a controller configured to control driving of the plurality of inverter circuits on a basis of a result determined by the material determiner, wherein:
the plurality of heating coils includes a first heating coil and a second heating coil that are adjacent to each other,
the material determiner makes a first determination that the heating target is loaded on the upper part of the first heating coil and the upper part of the second heating coil,
the material determiner makes a second determination that the material forming the heating target loaded on the upper part of the first heating coil at least includes a nonmagnetic material, and that the material forming the heating target loaded on the upper part of the second heating coil is a magnetic material, and
based on the material determiner making the first determination and the second determination, the controller is configured to:
set a frequency of the high-frequency current supplied to the first heating coil higher than a frequency of the high-frequency current supplied to the second heating coil, and
alternately switch an action between
an action of stopping supply of the high-frequency current to the first heating coil, and of supplying the high-frequency current to the second heating coil and
an action of stopping supply of the high-frequency current to the second heating coil, and of supplying the high-frequency current to the first heating coil.