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US 12,144,070 B2Granted
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.
Claims19
An electric heater comprising:
- a substrate;
- and
- a plane heating element 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 comprising:
- a plurality of tracks that define arc shapes about the center and are spaced apart from one another in a radial direction of the circular area, wherein a length of one of the plurality of tracks arranged at an outer side is greater than a length of another of the plurality of tracks arranged at an inner side relative to the outer side in the radial direction,
- a plurality of bridges that connect first and second tracks among the plurality of 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
- a pair of electrodes that are connected to the pattern portion and define an electrode gap therebetween,
- wherein each of the plurality of tracks, the plurality of bridges, and the pair of electrodes is symmetrical with respect to a reference line that passes through the center,
- wherein the pattern portion defines a gap between any two bridges among the plurality of bridges that face each other with respect to the reference line, the gap being narrower than the electrode gap, and
- wherein a thickness of each of the plurality of bridges is greater than a thickness of each of the plurality of tracks in a direction perpendicular to the substrate.
7 more elements
An electric heater comprising:
- a substrate;
- and
- a plane heating element 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 comprising:
- a plurality of tracks that define arc shapes about the center and are spaced apart from one another in a radial direction of the circular area, wherein a length of one of the plurality of tracks arranged at an outer side is greater than a length of another of the plurality of tracks arranged at an inner side relative to the outer side in the radial direction,
- a plurality of bridges that connect first and second tracks among the plurality of 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
- a pair of electrodes that are connected to the pattern portion and define an electrode gap therebetween,
- wherein each of the plurality of tracks, the plurality of bridges, and the pair of electrodes is symmetrical with respect to a reference line that passes through the center,
- wherein the pattern portion defines a gap between any two bridges among the plurality of bridges that face each other with respect to the reference line, the gap being narrower than the electrode gap, and
- wherein a gap between two bridges facing each other with respect to the reference line and disposed at an innermost side of the pattern portion is shorter than any one of gaps between other two bridges facing each other with respect to the reference line.
7 more elements
An electric heater comprising:
- a substrate;
- a plane heating element located at a surface of the substrate and defines a part of a circular area having a center;
- and
- an outer plane heating element that is located at the surface of the substrate and that is spaced apart from the plane heating element in a radial direction away from the center,
- wherein the plane heating element comprises a pattern portion comprising:
- a plurality of tracks that define arc shapes about the center and are spaced apart from one another in the radial direction of the circular area, wherein a length of one of the plurality of tracks arranged at an outer side is greater than a length of another of the plurality of tracks arranged at an inner side relative to the outer side in the radial direction,
- a plurality of bridges that connect first and second tracks among the plurality of 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
- a pair of electrodes that are connected to the pattern portion and define an electrode gap therebetween,
- wherein each of the plurality of tracks, the plurality of bridges, and the pair of electrodes is symmetrical with respect to a reference line that passes through the center,
- wherein the pattern portion defines a gap between any two bridges among the plurality of bridges that face each other with respect to the reference line, the gap being narrower than the electrode gap, and
- wherein the outer plane heating element comprises:
- at least one outer pattern portion that is spaced apart from the pattern portion in the radial direction away from the center;
- and
- a pair of outer electrodes connected to the outer pattern portion.
11 more elements
Dependencies are inferred from the claim text.