Electric heater
AssigneeLG Electronics Inc.
InventorMisun Song
Life of this patent
Estimating the term…
Abstract
An electric heater includes a substrate and an inner plane heating element formed on one surface of the substrate. The inner plane heating element includes an inner pattern portion connecting a start point with an end point. The inner pattern portion includes a first track, a second track located outside the first track and spaced part from the first track, a first bridge connecting the first track with one end of the second track, a third track located outside the second track and spaced apart from the second track, and a second bridge connecting the other end of the second track with the third track. A first gap G1 between the first and second tracks is shorter than a second gap G2 between the second and third tracks along a virtual line crossing the first, second and third tracks and closer to the first bridge than the second bridge.
Claims23
An electric heater comprising:
- a substrate;
- and
- an inner plane heating element that is located at a surface of the substrate and defines a part of a circular area having a center, the inner plane heating element comprising an inner pattern portion that is connected to a pair of inner electrodes and that comprises a plurality of arc-shaped tracks arranged about the center and spaced apart from one another in a radial direction passing through the center,
- wherein the plurality of arc-shaped tracks comprise:
- a first track,
- a second track spaced apart from the first track in the radial direction away from the center,
- a first bridge that connects the first track to a first end of the second track,
- a third track spaced apart from the second track in the radial direction away from the center, and
- a second bridge that connects a second end of the second track to the third track, wherein the inner pattern portion defines:
- a first gap between the first track and the second track, and
- a second gap between the second track and the third track, the second gap being wider than the first gap along a virtual line that crosses the first track, the second track, and the third track and that extends to a portion of the inner pattern portion closer to the first bridge than to the second bridge, and
- wherein the virtual line passes through the center.
An electric heater comprising:
- a substrate;
- and
- a plane heating element that is located at a surface of the substrate and defines a part of a circular area having a center,
- wherein the plane heating element comprises:
- a pattern portion that comprises a first track and a second track that define arc shapes about the center and that are spaced apart from each other in a radial direction passing through the center, wherein a length of one of the first track or the second track positioned farther from the center is greater than a length of the other of the first track and the second track positioned closer to the center, and
- a plurality of bridges that connect the first and second tracks in series, the plurality of bridges comprising a first bridge that connects the first track to one end of the second track in series, and
- wherein a first gap is defined between the first track and the second track along a virtual straight line passing through the center, the first track, and the second track, the first gap decreasing toward the first bridge.
Dependencies are inferred from the claim text.