Clothes treatment apparatus and control method therefor

Patent metadata

Field	Value
Publication number	US-11828016-B2
Application number	US-202217870290-A
Country	US
Kind code	B2
Filing date	Jul 21, 2022
Priority date	Aug 25, 2016
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

The present invention relates to a clothes treatment apparatus and, more particularly, to a clothes treatment apparatus for directly heating a drum accommodating clothes. According to an embodiment of the present disclosure, provided is a clothes treatment apparatus comprising: a tub; a drum, made of a metal, which accommodates clothes and is rotatably provided inside the tub; and an induction module, provided in the tub so as to have a spacing from a circumferential surface of the drum, for generating an electromagnetic field to heat the circumferential surface of the drum, wherein the induction module comprises: a coil which is formed by winding a wire such that electric current is applied thereto to generate a magnetic field; and a base housing mounted on an outer circumferential surface of the tub, wherein the base housing is provided with a coil slot for defining the shape of the coil in such a manner that the wire is mounted therein so as to have a predetermined distance between wire and wire.

First claim

What is claimed is:

1. A laundry treatment apparatus comprising:
a tub;
a drum rotatably disposed inside the tub for receiving laundry therein, wherein the drum is made of a metal material; and
an induction module disposed on the tub to be spaced from a circumferential surface of the drum for generating an electromagnetic field to heat the circumferential surface of the drum,
wherein the induction module comprises:
a coil formed of windings of wires, wherein the coil generates a magnetic field when an electric current is applied thereto; and a base housing mounted on an outer circumferential face of the tub,
wherein the base housing comprises coil slots configured to receive the wires,
wherein overall shape of each coil slot is a track shape with a long axis.

2. The laundry treatment apparatus of claim 1 , wherein the induction module includes a module cover coupled with the base housing for covering the coil.

3. The laundry treatment apparatus of claim 2 , wherein a permanent magnet is disposed between the module cover and the coil to direct the magnetic field generated from the coil toward the drum.

4. The laundry treatment apparatus of claim 3 , wherein the permanent magnet includes permanent magnets arranged in a longitudinal direction of the coil, wherein each of the permanent magnets is oriented to be perpendicular to a length direction of the coil.

5. The laundry treatment apparatus of claim 4 , wherein permanent-magnet-mounted portions are formed on a bottom of the module cover, wherein each permanent magnet is fixedly received in each permanent-magnet-mounted portion.

6. The laundry treatment apparatus of claim 2 , wherein the module cover includes press-contacting ribs that protrude downwards from a bottom face of the module cover to press-contact the coil.

7. The laundry treatment apparatus of claim 1 , wherein a module-mounted portion comprises a flat portion and is formed on an outer circumferential surface of the tub, wherein the induction module is mounted on the module-mounted portion.

8. The laundry treatment apparatus of claim 7 , wherein a distance between center of the tub and the flat portion is smaller than a distance between the center of the tub and the outer circumferential surface of the tub.

9. The laundry treatment apparatus of claim 8 , wherein the flat portion is formed by modifying a part of the outer circumferential surface of the tub into a flat.

10. The laundry treatment apparatus of claim 8 , wherein the flat portion is formed by depressing a part of the outer circumferential surface of the tub into a direction to the drum.

11. The laundry treatment apparatus of claim 7 , wherein the tub includes a front tub, a rear tub, and a tub connector connecting the front tub and the rear tub, wherein the tub connector extends radially outwardly,
wherein the base housing is in close contact with a top of the tub connector.

12. The laundry treatment apparatus of claim 11 , wherein the tub connector includes an extended tub connector that further protrudes radially outwardly from the tub, wherein an extended tub connector connects the front tub and the rear tub via a screw or bolt,
wherein the extended tub connector is absent in a region of the tub corresponding to the module-mounted portion.

13. The laundry treatment apparatus of claim 1 , wherein reinforcing ribs protrude downwards from a bottom of the base housing and maintain a spacing between the base housing and the outer circumferential face of the tub.

14. The laundry treatment apparatus of claim 13 , wherein the base housing has a through-hole defined therein through which air is discharged radially inwardly.

15. The laundry treatment apparatus of claim 13 , wherein each coil slot defines a coil receiving portion defined between adjacent fixing ribs.

16. The laundry treatment apparatus of claim 15 , wherein a spacing between the adjacent fixing ribs is set to be smaller than a diameter of each wire, wherein each wire is press-fitted into each coil slot.

17. The laundry treatment apparatus of claim 16 , wherein a protrusion height of the fixing rib is set to be larger than a diameter of each wire, wherein after each wire is inserted into each coil slot, a top of each fixing rib is melted to cover a top of each wire.

18. The laundry treatment apparatus of claim 13 , wherein the coil forms a single layer.

19. The laundry treatment apparatus of claim 18 , wherein the coil has a track shape with a long axis extending in a front-rear direction of the drum.

20. The laundry treatment apparatus of claim 19 , wherein the coil has two front-rear directional straight portions and two left-right directional straight portions, and has four curved portions between the two front-rear directional straight portions and two left-right directional straight portions,
wherein a radius of curvature of each of the curved portions in a radially innermost wire is equal to a radius of curvature of each of the curved portions in a radially outermost wire.

Assignees

• Lg Electronics Inc

Inventors

• Kim Beomjun
• Kim Woore
• Park Bio
• Park Seulgi
• Jang Jaehyuk
• Hong Sangwook
• Kim Changoh
• Noh Hyunwoo

Classifications

• D06F39/04 Primary

  Heating arrangements · CPC title

• D06F21/04

  within an enclosing receptacle · CPC title

• D06F34/24

  Liquid temperature · CPC title

• D06F37/04

  adapted for rotation or oscillation about a horizontal or inclined axis · CPC title

• D06F58/26

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