Electric heater and cooking appliance having same
AssigneeLG Electronics Inc.
InventorMisun Song
Life of this patent
Estimating the term…
Abstract
An electric heater includes a substrate; a first plane heating element disposed on a surface of the substrate; and a second plane heating element disposed on the surface of the substrate so as to be located outside the first plane heating element. The first plane heating element includes a first pattern portion having a start point and an end point, and a pair of first electrode portions connected to the first pattern portion. The second plane heating element includes a second pattern portion that surrounds a portion of an outer circumference of the first pattern portion, has a start point and an end point, and has an opening portion at one side thereof; and a pair of second electrode portions connected to the second pattern portion.
Claims20
An electric heater, comprising:
- a substrate;
- a first plane heating element disposed on one surface of the substrate and including a first pattern portion having an arc, the first pattern portion defining an area overlapping the first pattern portion in a vertical direction as a first heating zone;
- and
- a second plane heating element disposed on the one surface of the substrate and located radially outside of the first plane heating element,
- wherein the second plane heating element includes a second pattern portion having an arc and defining an area overlapping the second pattern portion in a vertical direction as a second heating zone;
- wherein the arc of the first pattern portion and the arc of the second pattern portion are spaced apart and positioned on a radially different position from each other so that the first heating zone and the second heating zone disposed without overlapping in the vertical direction, and
- wherein the arc of the first pattern portion and the arc of the second pattern portion are arranged symmetrical about a reference line passing a center of the first heating zone.
A cooking appliance comprising:
- a case forming an outer appearance;
- a display;
- an input unit;
- a power supply;
- an electric heater provided on the case;
- and
- a controller for controlling the electric heater, the power supply, and the display according to an input from the input unit, wherein the electric heater includes:
- a substrate;
- a first plane heating element disposed on one surface of the substrate and including a first pattern portion having an arc, the first pattern portion defining an area overlapping the first pattern portion in a vertical direction as a first heating zone;
- and
- a second plane heating element disposed on the one surface of the substrate and located radially outside of the first plane heating element,
- wherein the second plane heating element includes a second pattern portion having an arc and defining an area overlapping the second pattern portion in a vertical direction as a second heating zone;
- wherein the arc of the first pattern portion and the arc of the second pattern portion are spaced apart and positioned on a radially different position from each other so that the first heating zone and the second heating zone disposed without overlapping in the vertical direction, and
- wherein the arc of the first pattern portion and the arc of the second pattern portion are arranged symmetrical about a reference line passing a center of the first heating zone.
Dependencies are inferred from the claim text.