Laundry treating apparatus

Patent metadata

Field	Value
Publication number	US-11136707-B2
Application number	US-201916537148-A
Country	US
Kind code	B2
Filing date	Aug 9, 2019
Priority date	Aug 9, 2017
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

The present invention relates to a laundry care apparatus in which an induction module heats the drum uniformly using a magnetic field to dry laundry or heat wash-water, and center and front and rear regions of the drum are uniformly heated.

First claim

What is claimed is:

1. A laundry treating apparatus comprising:
a cabinet;
a drum made of a metal material and disposed in the cabinet, the drum being configured to receive laundry therein; and
an induction module spaced apart from an outer circumferential surface of the drum by a predetermined distance, the induction module comprising a coil made of a wire having a plurality of turns, and being configured to heat the drum by induction based on a magnetic field generated by current applied to the coil,
wherein the induction module comprises a base housing that has a rectangular shape and that is configured to accommodate the coil, the base housing having straight sections and corner sections,
wherein the base housing comprises ribs that protrude upward from a bottom surface of the base housing and that define a slot disposed between the ribs and configured to accommodate the coil therein, and
wherein a lateral thickness of each of the ribs disposed at each of the corner sections is greater than a lateral thickness of each of the ribs disposed at each of the straight sections, each lateral thickness being defined in a direction away from a center of the plurality of turns.

2. The laundry treating apparatus of claim 1 , wherein the ribs are configured to be fused to each other along a thermal-fusing line that is defined in each of the corner sections and that extends across each of the corner sections.

3. The laundry treating apparatus of claim 2 , wherein the thermal-fusing line extends radially across each of the corner sections.

4. The laundry treating apparatus of claim 2 , wherein the induction module further comprises a permanent magnet disposed vertically above the coil, and
wherein the thermal-fusing line extends along a length direction of the permanent magnet.

5. The laundry treating apparatus of claim 4 , wherein the induction module defines a permanent magnet mount configured to receive the permanent magnet, and
wherein the thermal-fusing line extends along an inner space of the permanent magnet mount.

6. The laundry treating apparatus of claim 1 , wherein the base housing further comprises a slot base configured to seat the coil, and
wherein the ribs extend upward from the slot base, and the slot is defined by the slot base and the ribs.

7. The laundry treating apparatus of claim 6 , wherein a protruding height of each of the ribs from the slot base is greater than a thickness of the wire.

8. The laundry treating apparatus of claim 1 , wherein adjacent ribs among the ribs define a space into which the wire is press-fitted, and
wherein a distance between the adjacent ribs is less than a diameter of the wire.

9. The laundry treating apparatus of claim 1 , wherein the straight sections comprise:
transverse straight portions comprising a front straight portion that faces a front side of the outer circumferential surface of the drum and a rear straight portion that faces a rear side of the outer circumferential surface of the drum; and
longitudinal straight portions that perpendicularly extend between the transverse straight portions, and
wherein each of the corner sections comprises a curved section that extends between one of the transverse straight portions and one of the longitudinal straight portions.

10. The laundry treating apparatus of claim 9 , wherein a length of an outermost wire disposed at each of the longitudinal straight portions is greater than a length of an outermost wire disposed at each of the transverse straight portions.

11. The laundry treating apparatus of claim 9 , wherein an outermost wire disposed at the front straight portion is spaced apart from a frontmost portion of the drum by a first predetermined spacing, and
wherein an outermost wire disposed at the rear straight portion is spaced apart from a rearmost portion of the drum by a second predetermined spacing.

12. The laundry treating apparatus of claim 11 , wherein each of the first predetermined spacing and the second predetermined spacing is in a range from 10 to 20 mm.

13. The laundry treating apparatus of claim 11 , wherein the base housing further comprises base fastening portions that extend outward from both sides of the base housing and that are configured to fix the base housing to the outer circumferential surface of the drum to thereby maintain the predetermined distance between the outer circumferential surface of the drum and the base housing.

14. The laundry treating apparatus of claim 13 , wherein each of the base fastening portions protrudes outward from one of the both sides of the base housing, and defines a base fastening hole configured to receive a fastener.

15. The laundry treating apparatus of claim 13 , wherein the base housing has a curved shape corresponding to the outer circumferential surface of the drum, and
wherein the wire is wound along the curved shape of the base housing.

16. The laundry treating apparatus of claim 10 , wherein the induction module further comprises a permanent magnet that is disposed on a top surface of the coil and oriented to be perpendicular to a length direction of the coil to thereby concentrate a direction of the magnetic field toward the drum.

17. The laundry treating apparatus of claim 16 , wherein the permanent magnet comprises a plurality of permanent magnets that are spaced apart from each other in a length direction of the coil.

18. The laundry treating apparatus of claim 17 , wherein the plurality of permanent magnets comprise rod shaped magnets having an equal length,
wherein the coil includes:
a front portion that faces a front side of the drum and a rear portion that faces a rear side of the drum; and
a central portion that is disposed between the front portion and the rear portion,

wherein a first area of the induction module corresponding to the central portion of the coil is greater than a second area of the induction module corresponding to the front portion of the coil and the rear portion of the coil, and
wherein a number of the plurality of permanent magnets arranged in the second area is greater than or equal to a number of the permanent magnets arranged in the first area.

19. The laundry treating apparatus of claim 3 , wherein the thermal-fusing line extends between a start point of each of the corner sections and an end point of each of the corner sections.

20. The laundry treating apparatus of claim 1 , wherein the ribs comprise:
first ribs disposed at each of the straight sections and spaced apart from each other, each of the first ribs having a first lateral thickness in the direction away from the center of the plurality of turns; and
second ribs disposed at each of the corner sections and spaced apart from each other, each of the second ribs having a second lateral thickness in the direction away from the center of the plurality of turns,
wherein the wire passes through a first space defined between the first ribs and a second space defined between the second ribs, and
wherein the second lateral thickness is greater than the first lateral thickness to thereby restrict an escape of the wire passing through the first space and the second space.

Assignees

• Lg Electronics Inc

Inventors

• Kim Beomjun
• Hong Sangwook
• Kim Woore
• Cho Hongjun

Classifications

• H05B6/36

  Coil arrangements · CPC title

• D06F58/26 Primary

  Heating arrangements, e.g. gas heating equipment (D06F58/18 takes precedence) · CPC title

• D06F39/04 Primary

  Heating arrangements · CPC title

• H05B6/108

  for heating a fluid · CPC title

• H05B6/102

  the metal pieces being rotated while induction heated · CPC title