Electric heater and cooking appliance having same
AssigneeLG Electronics Inc.
InventorsMisun Song, Yooseok Kwon
Life of this patent
Estimating the term…
Abstract
An electric heater includes a substrate; and a first plane heating element disposed on one surface of the substrate, in which the first plane heating element includes a first track; a second track spaced apart from the first track; and a third track spaced apart from the second track. At least a portion of the second track is located between the first track and the third track, and the first track and the second track are connected by a first bridge, where the first bridge includes a first outer protrusion protruding toward the third track. The third track is formed with a curved portion which protrudes in an outward direction, and the first outer protrusion faces an inside of the curved portion in the outward direction and is spaced apart from the curved portion.
Claims12
An electric heater, comprising:
- a substrate;
- a first plane heating element disposed on one surface of the substrate, the first plane heating element including:
- a first electrode portion;
- a first track extending from the first electrode portion;
- a second track outwardly spaced apart from the first track;
- a third track outwardly spaced apart from the second track, wherein at least a portion of the second track is located between the first track and the third track;
- a first bridge configured to connect one end of the first track and one end of the second track;
- and
- an inner protrusion protruding towards a center of the first plane beating element;
- and
- a second plane heating element disposed on an inner side of the first plane heating element and inwardly spaced apart from the first plane heating element, the second plane heating element including:
- a plurality of inner tracks which become smaller in length as a distance between an inner track and the first plane heating element increases;
- a second electrode portion connected to an inner track of the plurality of inner tracks, which is located at an outermost side of the second plane heating element;
- and
- a plurality of inner bridges to connect ends of adjacent inner tracks among the plurality of inner tracks,
- wherein a width of each track of the first plane heating element or a width of each track of the second plane heating element is configured to be larger than a gap of adjacent tracks,
- wherein the first electrode portion is located between the second electrode portion and the second bridge.
Dependencies are inferred from the claim text.