Apparatus for treating laundry

Patent metadata

Field	Value
Publication number	US-12084802-B2
Application number	US-202117466795-A
Country	US
Kind code	B2
Filing date	Sep 3, 2021
Priority date	Sep 4, 2020
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

A laundry treating apparatus includes a drum including a drum body, a front cover, and a rear cover, a fixed panel that is spaced apart from the rear cover and defines a panel inlet and a panel outlet, a rotor, an exhaust duct configured to guide air from the drum to the panel outlet, a heat exchanger configured dehumidify air in the exhaust duct, a flow path forming part fixed to the fixed panel and in contact with the drum, a duct body fixed to the fixed panel and configured to guide air from the panel outlet to the panel inlet, the duct body receiving the rotor, and a flow path guide configured to guide a portion of the air from the panel outlet to the duct body in a clockwise direction and another portion of the air from the panel outlet to the duct body in a counterclockwise direction.

First claim

What is claimed is:

1. An apparatus for treating laundry, comprising:
a cabinet;
a drum located in the cabinet, the drum comprising:
a drum body that has a cylindrical shape, the drum body defining a front opening at a front side thereof and a rear opening at a rear side thereof,
a front cover fixed to the front side of the drum body, the front cover defining a drum entrance that passes therethrough, and
a rear cover fixed to the rear side of the drum body, the rear cover defining an air inlet comprising a plurality of perforated holes;

a fixed panel that is spaced apart from the rear cover and defines a panel outlet and a panel inlet;
a drive part comprising:
a stator,
a rotor received in the panel inlet and configured to rotate relative to the stator, and
a power transmission fixed to the fixed panel and configured to transmit a rotational motion of the rotor to the drum;

an exhaust duct configured to guide air discharged from the drum to the panel outlet;
a heat exchange part configured to dehumidify and heat the air guided along the exhaust duct;
a flow path forming part that surrounds the air inlet of the rear cover, the flow path forming part having a first end fixed to the fixed panel and a second end in contact with the rear cover of the drum;
a supply duct comprising a duct body that is fixed to the fixed panel and configured to guide air discharged from the panel outlet to the panel inlet, the duct body defining a rotor receiving part that receives the rotor and exposes the rotor to an outside of the supply duct; and
a flow path guide configured to guide (i) a first portion of the air discharged from the panel outlet to the duct body in a first direction and (i) a second portion of the air discharged from the panel outlet to the duct body in a second direction opposite to the first direction.

2. The apparatus of claim 1 , wherein the flow path guide is configured to:
guide the first portion of the air to first perforated holes among the plurality of perforated holes, the first perforated holes being defined at a first side with respect to a reference line that passes through a center of the rotor receiving part and a center of the panel outlet; and
guide the second portion of the air to second perforated holes among the plurality of perforated holes, the second perforated holes being defined at a second side with respect to the reference line.

3. The apparatus of claim 2 , further comprising a projected wall that extends from the duct body toward the fixed panel.

4. The apparatus of claim 3 , wherein the projected wall divides the plurality of perforated holes such that a number of the first perforated holes is equal to a number of the second perforated holes.

5. The apparatus of claim 4 , wherein an end of the projected wall is spaced apart from the fixed panel.

6. The apparatus of claim 3 , wherein the plurality of perforated holes of the rear cover are arranged along a ring shape, a radius of the ring shape being greater than a half of a radius of the rear cover.

7. The apparatus of claim 3 , further comprising a duct cover that is fixed to the duct body and closes the rotor receiving part,
wherein the duct body defines:
an inlet flow path configured to introduce external air to the rotor receiving part, and
an outlet flow path configured to guide air in the rotor receiving part to an outside of the rotor receiving part, and

wherein the rotor comprises a vane configured to move the air in the rotor receiving part to the outlet flow path.

8. The apparatus of claim 7 , wherein the inlet flow path and the outlet flow path are recessed from a surface of the duct body facing the duct cover, and
wherein the inlet flow path, a rotation center of the rotor, and the outlet flow path are disposed along the reference line.

9. The apparatus of claim 7 , wherein the rotor comprises:
a rotor body having a disk shape, the rotor body defining a rotor perforated hole passing therethrough;
a rotor circumferential surface fixed to the rotor body; and
a permanent magnet fixed to the rotor circumferential surface.

10. The apparatus of claim 9 , wherein the rotor perforated hole comprises a slit, wherein a radial length of the slit in a diameter direction of the rotor body is greater than a circumferential length of the slit in a circumferential direction of the rotor body, and
wherein the vane extends along the diameter direction of the rotor body.

11. The apparatus of claim 10 , wherein the fixed panel extends in a direction away from the rotor to thereby define a drive part installation recess that receives at least one portion of the stator, and
wherein the fixed panel further defines a guide flow path configured to guide air in the drive part installation recess to the outlet flow path.

12. The apparatus of claim 1 , wherein the drive part further comprises:
a housing fixed to the fixed panel, the housing having a hollow cylindrical shape;
a base located within the housing;
a ring gear fixed within the housing;
a first shaft having a first end fixed to the rotor and a second end located within the housing; and
a second shaft that passes through the fixed panel and is concentric with the first shaft, the second shaft having a first end fixed to the rear cover of the drum and a second end that is located within the housing and fixed to the base.

13. The apparatus of claim 12 , wherein the drive part further comprises:
a driver gear located within the housing and fixed to the first shaft; and
a driven gear comprising:
a first body rotatably fixed to the base,
a first gear defined at a circumferential surface of the first body and engaged with the driver gear,
a second body fixed to the first body, a diameter of the second body being less than a diameter of the first body, and
a second gear defined at a circumferential surface of the second body and engaged with the ring gear.

14. The apparatus of claim 13 , wherein a diameter of the first gear is greater than a diameter of the driver gear, and
wherein a diameter of the second gear is greater than the diameter of the driver gear and less than the diameter of the first gear.

15. The apparatus of claim 1 , wherein the first direction is a clockwise direction about a rotation center of the rotor, and the second direction is a counterclockwise direction about the rotation center of the rotor.

16. The apparatus of claim 1 , further comprising:
a front panel that defines a front side of the apparatus and is located forward relative to the front cover of the drum; and
a body support part that is located between the front panel and the front cover of the drum and supports the drum body, the body support part defining a drum outlet configured to discharge air from the drum body.

17. The apparatus of claim 16 , wherein the exhaust duct comprises a first duct connected to the drum outlet and a second duct connected to the panel outlet.

18. The apparatus of claim 17 , wherein the exhaust duct is located below the drum body and further comprises a third duct that is coupled to a bottom of the cabinet and connects the first duct to the second duct.

19. The apparatus of claim 1 , wherein the panel outlet is defined radially outside a circumference of the panel inlet.

20. The apparatus of claim 1 , wherein the supply duct covers the panel inlet and the panel outlet.

Assignees

• Lg Electronics Inc

Inventors

• Cho Hongjun
• Kim Hyojun
• Kim Hyeonjoong
• Kwon Oshin
• Hwang Yangguk
• Lee Hyuksoo
• Lee Yeonju

Classifications

• D06F37/30

  Driving arrangements  (control circuits or arrangements D06F34/08) · CPC title

• D06F58/08 Primary

  Driving arrangements · CPC title

• H02K9/02

  by ambient air flowing through the machine · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K1/27

  Rotor cores with permanent magnets · CPC title