Coil unit and induction cooker

Abstract

To efficiently heat the object to be heated. [Solution] The coil unit according to the present disclosure comprises a first heating region and a plurality of coils arranged in a second heating region for heating an object to be heated. The second heating region is provided around the first heating region, has a fan shape, and comprises a plurality of coil arrangement regions defined by a plurality of boundary lines extending radially from the center of the second heating region toward the outer circumference and an outer circumference line defining the outer circumference of the arc portion of the second heating region. The coils arranged in the second heating region each comprise a plurality of coil pieces arranged in the plurality of coil arrangement regions. Each of the plurality of coil pieces in the second heating region has a coil wire arranged along two adjacent boundary lines among the plurality of boundary lines defining the plurality of coil arrangement regions. The coil wire comprises a first coil wire portion arranged along the two adjacent boundary lines and the outer circumference line, and a second coil wire portion arranged inside the first coil wire portion.

Claims

1. In a plan view, the device comprises a plurality of coils arranged in a first heating region and a second heating region for heating an object to be heated. The aforementioned second heating region is In a plan view, it is provided around the first heating region and has a fan shape, In a plan view, the second heating region has a plurality of coil arrangement regions defined by a plurality of boundary lines extending radially from the center toward the outer periphery, and an outer periphery line defining the outer periphery of the arc portion of the second heating region. The coil arranged in the second heating region has, in a plan view, a plurality of coil pieces arranged in each of the plurality of coil arrangement regions, Each of the plurality of coil pieces in the second heating region has a coil wire that, in a plan view, is positioned along two adjacent boundary lines among the plurality of boundary lines that define the plurality of coil arrangement regions. The aforementioned coil wire is A first coil wire portion is arranged along the two adjacent boundary lines and the outer circumference line in a plan view, In a plan view, a second coil wire portion is positioned inside the first coil wire portion, Having, Coil unit.

2. The second coil wire portion is arranged along the inside of the first coil wire portion in a plan view. The coil unit according to claim 1.

3. The coil wire further has a third coil wire portion that is located inside the second coil wire portion in a plan view. The third coil wire portion is arranged along the inside of the second coil wire portion in a plan view. The coil unit according to claim 2.

4. The wire width of the first coil wire section and the wire width of the second coil wire section are different. The coil unit according to claim 2 or 3.

5. The wire width of the second coil wire section is greater than the wire width of the first coil wire section. The coil unit according to any one of claims 2 to 4.

6. In a plan view, a gap is formed between the first coil wire portion and the second coil wire portion on the central side of the second heating region. The coil unit according to claim 5.

7. The gap is further provided with ferrite. The coil unit according to claim 6.

8. Each of the aforementioned plurality of coil arrangement regions, in a plan view, The first arrangement region formed on the central side of the second heating region, A second arrangement area is located outside the first arrangement area, It has, The first arrangement region is defined in plan view by two adjacent boundary lines and an intermediate line connecting the two adjacent boundary lines between the center of the second heating region and the outer perimeter line. The second arrangement region is defined in plan view by the two adjacent boundary lines, the outer perimeter line, and the intermediate line. Each of the aforementioned plurality of coil pieces is In a plan view, a first coil wire is arranged within the first arrangement area and along the two adjacent boundary lines and the intermediate line, In a plan view, a second coil wire is arranged within the second arrangement region and along the two adjacent boundary lines, the outer perimeter line, and the intermediate line, It has, The second coil wire has the first coil wire portion and the second coil wire portion. A coil unit according to any one of claims 1 to 3.

9. The first arrangement region has a substantially triangular shape in plan view, The second arrangement region has a roughly trapezoidal shape in plan view. The coil unit according to claim 8.

10. The plurality of boundary lines of the second heating region are straight lines, In a plan view, the coil wire of the second heating region is arranged along the two adjacent boundary lines and the outer perimeter line connecting the two boundary lines. A coil unit according to any one of claims 1 to 9.

11. The plurality of coil arrangement regions in the second heating region have substantially the same shape in a plan view. The plurality of coil pieces in the second heating region have substantially the same shape in a plan view. A coil unit according to any one of claims 1 to 10.

12. The first heating region has a plurality of coil arrangement regions defined by a plurality of boundary lines extending radially from the center of the first heating region toward the outer periphery in a plan view, and an outer periphery line defining the outer periphery of the first heating region. The coil placed in the first heating region has a plurality of coil pieces, each of which is placed in the plurality of coil placement regions. Each of the plurality of coil pieces in the first heating region has a coil wire that, in a plan view, is positioned along two adjacent boundary lines among the plurality of boundary lines that define the plurality of coil arrangement regions. The coil unit according to any one of claims 1 to 11.

13. The plurality of boundary lines of the first heating region are straight lines, The coil wire of the first heating region is arranged in a plan view along the two adjacent boundary lines and the outer perimeter line connecting the two boundary lines. The coil unit according to claim 12.

14. The plurality of coil arrangement regions in the first heating region have substantially the same shape in a plan view. The plurality of coil pieces in the first heating region have substantially the same shape in a plan view. The coil unit according to claim 12 or 13.

15. The plurality of coil pieces in the first heating region have substantially the same shape as the plurality of coil pieces in the second heating region. The coil unit according to any one of claims 12 to 14.

16. The first heating region has a circular shape in plan view. The coil unit according to any one of claims 1 to 15.

17. In the direction in which the first heating region and the second heating region are aligned, a third heating region having a fan shape is provided around the second heating region, The third heating region has, in a plan view, a plurality of coil arrangement regions defined by a plurality of boundary lines extending radially from the center of the third heating region toward the outer periphery, and an outer periphery line defining the outer periphery of the arc portion of the third heating region. The coil arranged in the third heating region has, in a plan view, a plurality of coil pieces arranged in each of the plurality of coil arrangement regions, Each of the plurality of coil pieces in the third heating region has a coil wire that, in a plan view, is positioned along two adjacent boundary lines among the plurality of boundary lines that define the plurality of coil arrangement regions. A coil unit according to any one of claims 1 to 16.

18. The plurality of coil arrangement regions in the third heating region have substantially the same shape in a plan view. The plurality of coil pieces in the third heating region have substantially the same shape in a plan view. The coil unit according to claim 17.

19. The plurality of coil pieces in the third heating region have substantially the same shape as the plurality of coil pieces in the second heating region. The coil unit according to claim 17 or 18.

20. An induction cooker comprising one or more coil units as described in any one of claims 1 to 19.

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