公开(公告)号：US10904952B2

公开(公告)日：2021-01-26

申请号：US15900474

申请日：2018-02-20

Applicant: LG ELECTRONICS INC.

Inventor： Changwoo Jeong ,  Youngjun Lee ,  Deok Hyun Hwang

IPC: H05B3/74 ,  H05B3/14 ,  H05B3/00 ,  H05B3/18 ,  H05B3/28 ,  H05B3/68 ,  H05B3/26

Abstract: A surface heater including a substrate, an insulating layer positioned on the substrate, and a heater layer positioned on the insulating layer, wherein the insulating layer and the heating layer are co-fired.

公开(公告)号：US11415324B2

公开(公告)日：2022-08-16

申请号：US16546865

申请日：2019-08-21

Applicant: LG Electronics Inc.

Inventor： Misun Song ,  Changwoo Jeong

IPC: H05B3/02 ,  F24C7/08 ,  F24C7/06

Abstract: An electric heater includes a substrate, an inner pattern part, and an outer pattern part positioned outside the inner pattern part and spaced apart from the inner pattern part. The inner pattern part includes a plurality of inner tracks spaced apart from each other and a plurality of inner bridges that connect the plurality of inner tracks to each other in series. The outer pattern part includes a plurality of outer tracks spaced apart from each other and a plurality of outer bridges that connect the plurality of outer tracks to each other in series. A length of one or more of the plurality of inner tracks is longer than a length of each of the plurality of the outer tracks.