US 12,289,815 B2
Cooking apparatus
Hyunwook Moon, Seoul (KR); Eui Sung Kim, Seoul (KR); and Dooyong Oh, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 16/768,528
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Jan. 9, 2019, PCT No. PCT/KR2019/000357
§ 371(c)(1), (2) Date May 29, 2020,
PCT Pub. No. WO2019/156371, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 10-2018-0015455 (KR), filed on Feb. 8, 2018.
Prior Publication US 2021/0195698 A1, Jun. 24, 2021
Int. Cl. H05B 6/06 (2006.01); H05B 6/12 (2006.01)
CPC H05B 6/062 (2013.01) [H05B 6/1236 (2013.01); H05B 6/1245 (2013.01); H05B 2213/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cooking apparatus, comprising:
an upper plate configured to support a cooking vessel;
a heating module that is disposed in a lower space defined vertically below the upper plate and that is configured to move in the lower space relative to the upper plate, the heating module including a coil;
a substrate disposed between the upper plate and the heating module, the substrate including a plurality of coil patterns;
an inverter configured to cause resonance current to be supplied to each of the plurality of coil patterns; and
a controller configured to:
control the heating module, the plurality of coil patterns, and the inverter,
determine a position of the cooking vessel on the upper plate based on (i) a number of pulses of the resonance current supplied to each of the plurality of coil patterns or (ii) frequencies of the resonance current,
when the position of the cooking vessel is identified through a comparison of the number of pulses, determine that the cooking vessel is made of metal, and
when the position of the cooking vessel is identified through a comparison of the frequencies, determine that the cooking vessel includes an induction coil.