Coil assembly and induction heating device including a coil assembly

Patent metadata

Field	Value
Publication number	US-10904957-B2
Application number	US-201816018167-A
Country	US
Kind code	B2
Filing date	Jun 26, 2018
Priority date	Jun 26, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A coil assembly and an induction heating device including a coil assembly are provided. The coil assembly may include a coil frame having a shape corresponding to a shape of a heating region defined in a plate. A working coil may extend alternately in between opposite first and second directions, rather than being circularly arranged as in related art coil assemblies.

First claim

What is claimed is:

1. A coil assembly, comprising:
a coil frame having a shape of a flat plate, wherein a coil accommodation structure is disposed on a first surface of the coil frame; and
a working coil extending in the coil accommodation structure, wherein a direction of extension of the working coil is alternated between opposite first and second direction wherein the coil frame includes:
a first coil holding structure having a shape of a bar, disposed at a first side of the coil accommodation structure and being spaced apart from the first surface of the coil frame; and
a second coil holding structure having a shape of a bar, disposed at a second side of the coil accommodation structure and opposite to the first coil holding structure, and being spaced apart from the first surface of the coil frame, wherein the working coil is wound and turns around the first coil holding structure such that the direction of extension of the working coil is changed from the first direction to the second direction, and wherein the working coil is wound and turns around the second coil holding structure such that the direction of extension of the working coil is changed from the second direction to the first direction.

2. The coil assembly of claim 1 , wherein the coil accommodation structure includes:
a first coil accommodation structure, wherein a first working coil extends in the first coil accommodation structure; and
a second coil accommodation structure, wherein a second working coil extends in the second coil accommodation structure, and wherein a magnetic flux generation region is defined between the first coil accommodation structure and the second coil accommodation structure.

3. The coil assembly of claim 1 , wherein the coil accommodation structure includes at least one coil receiving groove defined therein configured to receive the working coil therein.

4. The coil assembly of claim 1 , wherein the coil frame includes:
a first intersecting space defined between the coil accommodation structure and first coil holding structure; and
a second intersecting space defined between the coil accommodation structure and second coil holding structure.

5. The coil assembly of claim 1 , wherein the working coil is wound in a rectangular shape.

6. The coil assembly of claim 1 , further comprising at least one magnetic core disposed on a second surface of the coil frame.

7. An induction heating device, comprising:
a cover plate including a plate, wherein a heating region is defined in the plate;
a coil assembly disposed below the plate, wherein the coil assembly corresponds to the heating region; and
a casing that houses the coil assembly therein, wherein the casing is sealed by the cover plate, and wherein the coil assembly comprises:
a coil frame having a shape of a flat plate, wherein a coil accommodation structure is disposed on a first surface of the coil frame; and
a working coil extending in the coil accommodation structure, wherein a direction of extension of the working coil is alternated between opposite first and second directions, wherein the coil frame includes:
a first coil holding structure having a shape of a bar, disposed at a first side of the coil accommodation structure and being spaced apart from the first surface of the coil frame; and
a second coil holding structure having a shape of a bar, disposed at a second side of the coil accommodation structure and opposite to the first coil holding structure, and being spaced apart from the first surface of the coil frame, wherein the working coil is wound and turns around the first coil holding structure such that the direction of extension of the working coil is changed from the first direction to the second direction, and wherein the working coil is wound and turns around the second coil holding structure such that the direction of extension of the working coil is changed from the second direction to the first direction.

8. The induction heating device of claim 7 , wherein the coil accommodation structure includes:
a first coil accommodation structure, wherein a first working coil extends in the first coil accommodation structure; and
a second coil accommodation structure, wherein a second working coil extends in the second coil accommodation structure, and wherein a magnetic flux generation region is defined between the first coil accommodation structure and the second coil accommodation structure.

9. The induction heating device of claim 7 , wherein the coil accommodation structure includes at least one coil receiving groove defined therein configured to receive the working coil therein.

10. The induction heating device of claim 7 , wherein the coil frame includes:
a first intersecting space defined between the coil accommodation structure and first coil holding structure; and
a second intersecting space defined between the coil accommodation structure and second coil holding structure.

11. The induction heating device of claim 7 , wherein the coil assembly further comprises at least one magnetic core disposed on a second surface of the coil frame.

12. A coil assembly, comprising:
a coil frame having a shape of a flat plate; and
a coil accommodation structure disposed on a first surface of the coil frame, wherein the coil accommodation structure includes:
a first coil accommodation structure including a plurality of coil-receiving grooves configured to receive a first working coil; and
a second coil accommodation structure including a plurality of coil-receiving grooves configured to receive a second working coil, wherein the coil frame includes:
a first coil holding structure having a shape of a bar, disposed at a first side of the coil accommodation structure and being spaced apart from the first surface of the coil frame, and a second coil holding structure having a shape of a bar, disposed at a second side of the coil accommodation structure and opposite to the first coil holding structure, and being spaced apart from the first surface of the coil frame, wherein the working coil is wound and turns around the first coil holding structure such that the direction of extension of the working coil is changed from the first direction to the second direction, and wherein the working coil is wound and turns around the second coil holding structure such that the direction of extension of the working coil is changed from the second direction to the first direction.

13. The coil assembly of claim 12 , wherein a magnetic flux generation region is defined between the first coil accommodation structure and the second coil accommodation structure.

14. The coil assembly of claim 12 , further comprising at least one magnetic core disposed on a second surface of the coil frame.

Assignees

• Lg Electronics Inc

Inventors

• Lee Heejun

Classifications

• H05B6/365

  using supplementary conductive or ferromagnetic pieces · CPC title

• H05B6/362

  with flat coil conductors · CPC title

• H05B6/1245 Primary

  with special coil arrangements · CPC title

• H05B2213/03

  Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate · CPC title

• H05B2206/022

  Special supports for the induction coils · CPC title