Patent ID: 11867410
Assignee: LG ELECTRONICS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H | IPC A  F  H

Claim 0:
1. An electric heater comprising:
a substrate;
a first plane heating element disposed on one surface of the substrate; and
a second plane heating element disposed on the one surface of the substrate so as to be located outside of the first plane heating element,
wherein the first plane heating element includes:
a first pattern portion including a start point and an end point, and disposed on a first zone, the start point and the end point of the first pattern portion disposed at same distance from a center of the first zone, and
a pair of first electrode portions connected to the respective start point and end point of the first pattern portion, the pair of first electrode portions disposed outside the first zone, and

wherein the second plane heating element includes:
a second pattern portion that surrounds a portion of an outer circumference of the first pattern portion, the second pattern portion including a start point and an end point, the start point and the end point of the second pattern portion disposed at same distance from a center of the first zone, and having an opening portion at one side thereof; and
a pair of second electrode portions connected to the respective start portion and end portion of the second pattern portion, the pair of second electrode portions disposed outside the first zone.