Laundry treatment apparatus and method of controlling the same

Patent metadata

Field	Value
Publication number	US-11060231-B2
Application number	US-201816059302-A
Country	US
Kind code	B2
Filing date	Aug 9, 2018
Priority date	Aug 9, 2017
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

Disclosed is a laundry treatment apparatus configured to directly heat a drum containing laundry therein. The laundry treatment apparatus comprising: a cabinet forming an external appearance of the laundry treatment apparatus; a tub provided in the cabinet; a drum configured to rotate within the tub and to contain laundry therein, the drum being formed of a metallic material; an induction module provided at an outer surface of the tub and configured to heat the drum within the tub via induction by generating a magnetic field; and wherein the outer surface of the tub comprises at least one mounting portion that is configured to mount the induction module, with at least part of the at least one mounting portion being arranged radially closer to a rotational axis of the drum than a remaining portion of the outer surface of the tub.

First claim

What is claimed is:

1. A laundry treatment apparatus comprising:
a cabinet that defines an external appearance of the laundry treatment apparatus;
a tub provided in the cabinet;
a drum configured to rotate within the tub and to receive laundry therein, the drum being made of a metallic material; and
an induction module provided at an outer surface of the tub and configured to generate a magnetic field to heat the drum within the tub via induction,
wherein the outer surface of the tub comprises at least one mounting portion that is arranged radially closer to a rotational axis of the drum than a remaining portion of the outer surface of the tub and that is configured to mount the induction module.

2. The laundry treatment apparatus according to claim 1 , wherein the at least one mounting portion is located at an upper portion of the tub.

3. The laundry treatment apparatus according to claim 1 , wherein a portion of an inner surface of the tub that corresponds to a location of the at least one mounting portion is arranged radially closer to the rotational axis of the drum than a remaining portion of the inner surface of the tub.

4. The laundry treatment apparatus according to claim 1 , wherein an outer surface of at least one region of the at least one mounting portion is flat.

5. The laundry treatment apparatus according to claim 4 , wherein the at least one region of the at least one mounting portion has a rectangular shape.

6. The laundry treatment apparatus according to claim 4 , wherein the at least one region of the at least one mounting portion comprises a first flat region and a second flat region, and
wherein the first flat region and the second flat region of the at least one mounting portion are connected to each other via a connection region that is curved or flat.

7. The laundry treatment apparatus according to claim 6 , wherein the induction module has a first end and a second end in a circumferential direction that are located over the first flat region and the second flat region of the at least one mounting portion, respectively.

8. The laundry treatment apparatus according to claim 4 , wherein the at least one mounting portion further comprises:
a first connection region that connects a first end of the at least one region of the at least one mounting portion to the remaining portion of the outer surface of the tub; and
a second connection region that connects a second end of the at least one region of the at least one mounting portion to the remaining portion of the outer surface of the tub.

9. The laundry treatment apparatus according to claim 8 , wherein a center portion of the induction module is arranged in a plane that includes a rotational axis of the drum and that is perpendicular to the outer surface of the at least one region of the at least one mounting portion.

10. A laundry treatment apparatus comprising:
a cabinet that defines an external appearance of the laundry treatment apparatus;
a tub provided in the cabinet;
a drum configured to rotate within the tub and to receive laundry therein, the drum being made of a metallic material; and
an induction module provided on an outer surface of the tub and configured to generate a magnetic field to heat the drum within the tub via induction, the induction module comprising a coil that extends between a front portion of the tub and a rear portion of the tub, that is configured to generate the magnetic field, and that comprises at least one first portion that is flat and arranged on the outer surface of the tub,
wherein the outer surface of the tub comprises at least one mounting portion that is arranged radially closer to a rotational axis of the drum than a remaining portion of the outer surface of the tub and that is configured to mount the induction module, the at least one mounting portion having an outer surface that is parallel to the at least one first portion of the coil.

11. The laundry treatment apparatus according to claim 10 , wherein the induction module further comprises a base housing configured to accommodate the coil and within which the coil is wound, the base housing being secured to the outer surface of the tub, with at least part of the base housing being parallel to the at least one mounting portion of the tub.

12. The laundry treatment apparatus according to claim 11 , wherein the coil is arranged such that a first length thereof along an axial direction of the drum is greater than a second length thereof along a circumferential direction of the drum.

13. The laundry treatment apparatus according to claim 12 , wherein the tub comprises a first tub portion and a second tub portion that are configured to be coupled by a fastening portion that, in a state in which the first tub portion and the second tub portion are coupled, protrudes outward from the outer surface of the tub by a first distance, and
wherein a lower surface of the base housing is configured to be spaced apart from the outer surface of the tub by a second distance that is at least as large as the first distance.

14. The laundry treatment apparatus according to claim 11 , wherein the tub comprises:
a front tub portion surrounding a front portion of the drum;
a rear tub portion surrounding a rear portion of the drum; and
a coupling portion that connects the front tub portion and the rear tub portion to each other, the coupling portion being formed along a circumferential direction of the tub,
wherein, in a state in which the front tub portion is coupled to the rear tub portion and the induction module is mounted on the tub, the induction module is arranged on the outer surface of the tub over the front tub portion and over the rear tub portion.

15. The laundry treatment apparatus according to claim 14 , wherein the base housing comprises reinforcing ribs protruding downwards from a bottom surface of the base housing and that extend between a gap between the outer surface of the tub and the bottom surface of the base housing, and
wherein the reinforcing ribs are configured to be arranged in front of and behind the coupling portion of the tub that protrudes from the outer surface of the tub.

16. The laundry treatment apparatus according to claim 15 , wherein a portion of the coupling portion of the tub that is located under the induction module comprises:
a first coupling rib that protrudes and is bent radially outwards from a first region that is arranged at a first distal portion of any one of the front tub portion or the rear tub portion, the first coupling rib defining an insertion recess configured to accommodate a second distal portion of a remaining one of the front tub portion or the rear tub portion; and
a second coupling rib that protrudes radially outwards from a second region that is arranged at the second distal portion of the remaining one of the front tub portion or the rear tub portion, and
wherein a first outer surface of the first coupling rib along a radial direction and a second outer surface of the second coupling rib along the radial direction have a same radius.

17. The laundry treatment apparatus according to claim 16 , wherein the first coupling rib is arranged to couple with the second coupling rib so as to form a space configured to accommodate a rubber packing that is configured to prevent water leakage.

18. The laundry treatment apparatus according to claim 16 , wherein the portion of the coupling portion of the tub, which is located under the induction module, is arranged above the tub.

19. The laundry treatment apparatus according to

Assignees

• Lg Electronics Inc

Inventors

• Kim Beomjun
• Park Bio
• Hong Sangwook

Classifications

• H05B6/02

  Induction heating · CPC title

• D06F37/267

  Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups (D06F37/206 takes precedence) · CPC title

• D06F58/26 Primary

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

• D06F2105/28

  Electric heating · CPC title

• D06F39/04 Primary

  Heating arrangements · CPC title