US Patent No. 10,973,091

INDUCTION HEAT COOKING APPARATUS AND OPERATING METHOD THEREOF


Patent No. 10,973,091
Issue Date April 06, 2021
Title Induction Heat Cooking Apparatus And Operating Method Thereof
Inventorship Seongho Son, Seoul (KR)
Taewoong Kong, Seoul (KR)
Younghwan Kwack, Seoul (KR)
Jaekyung Yang, Seoul (KR)
Yongsoo Lee, Seoul (KR)
Hyojin Choi, Seoul (KR)
Assignee LG Electronics Inc., Seoul (KR)

Claim of US Patent No. 10,973,091

1. An induction heat cooking apparatus comprising:a power supply configured to supply an alternating current (AC) voltage;
a rectifier configured to convert the AC voltage into a direct current (DC) voltage;
a working coil configured to operate based on the DC voltage generated from the rectifier;
a first switch and a second switch that are configured to control supply of the DC voltage to the working coil and that are configured to alternately apply the DC voltage to the working coil;
a comparison circuit that is configured to sense current flowing in the working coil, that is configured to compare the sensed current to a reference value, and that is configured to generate output pulses based on a comparison result of the sensed current with respect to the reference value; and
a controller configured to:
count a number of the output pulses generated from the comparison circuit, and
determine whether a cooking vessel is present on the working coil based on the number of the output pulses.