Laundry treatment apparatus

Patent metadata

Field	Value
Publication number	US-10876248-B2
Application number	US-201816059130-A
Country	US
Kind code	B2
Filing date	Aug 9, 2018
Priority date	Aug 9, 2017
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

Disclosed is a laundry treatment apparatus configured to directly heat a drum containing laundry therein using an induction module. The laundry treatment apparatus includes a cabinet, a tub provided in the cabinet, a drum for containing laundry therein, the drum being rotatably provided in the tub and being formed of a metallic material, an induction module provided so as to be spaced apart from the circumferential surface of the drum in order to heat the circumferential surface of the drum using a magnetic field generated by applying current to a coil, a module control unit for controlling the output of the induction module, a cooling path through which the outside of the cabinet, the interior of the module control unit and the interior of the induction module communicate sequentially with each other, and a fan provided in the cooling path. The apparatus is capable of improving efficiency and enhancing safety.

First claim

What is claimed is:

1. A laundry treatment apparatus comprising:
a cabinet;
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 via induction using a magnetic field generated by applying current to a coil within the induction module;
a module control unit comprising at least one processor configured to control an output of the induction module;
a cooling path defined in the laundry treatment apparatus and through which air flows sequentially through an outside of the cabinet, an interior of the module control unit, and an interior of the induction module; and
a fan provided in the cooling path.

2. The laundry treatment apparatus according to claim 1 , wherein the module control unit comprises:
a housing comprising an airflow path formed therein;
a substrate provided in the housing; and
a power transistor mounted on the substrate.

3. The laundry treatment apparatus according to claim 2 , further comprising:
a heat sink configured to dissipate heat from the power transistor,
wherein the airflow path is formed along the heat sink and the power transistor.

4. The laundry treatment apparatus according to claim 3 , wherein the housing comprises:
an air inlet hole through which air is introduced into the housing from an outside of the housing; and
an air outlet hole through which the air introduced into the housing is discharged outside of the housing,
wherein the air flow path is defined between the air inlet hole and the air outlet hole.

5. The laundry treatment apparatus according to claim 4 , wherein the air inlet hole, the air outlet hole, and the air flow path are formed in a first side of the housing,
wherein a penetration portion is formed in a second side of the housing that is opposite the first side, and that is configured to cool the substrate using convection, and
wherein a partition wall is formed in the housing that partitions the housing into the first side of the housing and the second side of the housing.

6. The laundry treatment apparatus according to claim 1 , wherein the module control unit is provided behind an upper portion of the tub,
wherein the cooling path comprises:
a duct provided at a rear side of the cabinet and configured to allow air to flow between an outside of the cabinet and an interior of the cabinet;
an airflow path formed in a housing of the module control unit; and
a connection duct through which air flows between an interior of the induction module and an interior of the housing,

wherein the fan is provided between the duct and the housing.

7. The laundry treatment apparatus according to claim 6 , wherein the induction module comprises:
a base housing to which the coil is configured to be secured, the base housing being mounted on an outer surface of the tub; and
a cover coupled to an upper side of the base housing and configured to form a space inside the induction module.

8. The laundry treatment apparatus according to claim 7 , wherein the connection duct is arranged such that a portion of a housing of the induction module and a portion of the housing of the module control unit are connected to each other.

9. The laundry treatment apparatus according to claim 7 , wherein the base housing comprises:
a mounting slot formed in a top surface of the base housing and configured to mount the coil;
a seating rib protruding downwards from a bottom surface of the base housing and configured to be seated on the outer surface of the tub; and
an opening that penetrates through the top surface and the bottom surface of the base housing.

10. The laundry treatment apparatus according to claim 9 , wherein the base housing comprises a sealed portion through which the opening is not formed, and
wherein the opening and the sealed portion are formed alternately along a longitudinal direction and along a width direction of the base housing.

11. The laundry treatment apparatus according to claim 10 , wherein the mounting slot is formed in the sealed portion, and
wherein the coil is configured to be mounted on the sealed portion and the opening.

12. The laundry treatment apparatus according to claim 9 , wherein the connection duct is formed so as to discharge air from an upper center portion of the base housing in a radial direction.

Assignees

• Lg Electronics Inc

Inventors

• Kim Woore
• Cho Hongjun
• Hong Sangwook

Classifications

• D06F58/32

  Control of operations performed in domestic laundry dryers  (control of operations performed in washer-dryers D06F33/50; details of control systems, e.g. for detecting or measuring specific parameters or for selection or indication of programs D06F34/00) · CPC title

• D06F58/26 Primary

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

• D06F58/24

  Condensing arrangements · CPC title

• D06F39/04 Primary

  Heating arrangements · CPC title

• H05B6/10

  Induction heating apparatus, other than furnaces, for specific applications · CPC title