US 12,013,130 B2
Induction heating type cooktop having improved use convenience
Wontae Kim, Seoul (KR); Seongho Son, Seoul (KR); Jaekyung Yang, Seoul (KR); Yongsoo Lee, Seoul (KR); and Hyunwoo Jun, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Aug. 4, 2022, as Appl. No. 17/881,246.
Application 17/881,246 is a continuation of application No. 16/558,039, filed on Aug. 31, 2019, granted, now 11,441,783.
Claims priority of application No. 10-2018-0103957 (KR), filed on Aug. 31, 2018.
Prior Publication US 2022/0373187 A1, Nov. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F24C 7/08 (2006.01); H05B 3/74 (2006.01); H05B 6/10 (2006.01); H05B 6/12 (2006.01)
CPC F24C 7/087 (2013.01) [H05B 3/748 (2013.01); H05B 6/105 (2013.01); H05B 6/1209 (2013.01); H05B 6/1263 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An induction cooktop, comprising:
a case;
a cover plate coupled to an upper end of the case, the cover plate comprising an upper plate configured to seat an object on an upper surface of the upper plate;
a working coil disposed in the case and configured to heat the object;
a thin film disposed at the upper surface of the upper plate or a lower surface of the upper plate; and
a thermal insulating member disposed vertically between the lower surface of the upper plate and the working coil,
wherein a skin depth of the thin film is greater than a thickness of the thin film such that a magnetic field of the working coil passes through the thin film and is delivered to the object, and
wherein the working coil is configured to:
inductively heat a magnetic object, and
conductively heat a non-magnetic object by inductively heating the thin film.