Laundry treating apparatus

Patent metadata

Field	Value
Publication number	US-12129592-B2
Application number	US-202117179761-A
Country	US
Kind code	B2
Filing date	Feb 19, 2021
Priority date	Feb 21, 2020
Publication date	Oct 29, 2024
Grant date	Oct 29, 2024

Abstract

A laundry treating apparatus includes a duct system including an air discharge duct for discharging air inside the drum to an outside of the drum, an air supply duct for supplying air to the drum, and a connection duct for connecting the air discharge duct and the air supply duct to each other. The apparatus also includes a heat-absorber disposed inside the connection duct to remove moisture from air, and a heat-emitter disposed inside the connection duct to heat air passing through the heat-absorber. The apparatus further includes a water ejector disposed in the duct system and defining a water flow path for supplying water to the heat-absorber to remove foreign substances remaining on the heat-absorber.

First claim

What is claimed is:

1. A laundry treating apparatus comprising:
a cabinet;
a drum that is located inside the cabinet and that defines a space to receive laundry;
a duct system including:
an air discharge duct configured to discharge air from inside of the drum to an outside of the drum,
an air supply duct configured to supply air to the drum, and
a connection duct configured to connect the air discharge duct and the air supply duct to each other;

a fan configured to move air along the duct system;
a heat-exchanger including:
a heat-absorber that is located inside the connection duct and that is configured to remove moisture from air within the connection duct, and
a heat-emitter that is located inside the connection duct and that is configured to heat air passing through the heat-absorber;

a water collector configured to store water removed from air passing through the heat-absorber;
a water ejector that is located in the duct system and that defines a water flow path that supplies water to the heat-absorber to remove foreign substances remaining on the heat-absorber;
a water flow-path controller including:
a controller housing that defines a space to store water,
a water discharge pipe configured to discharge water from the space of the controller housing to an outside of the laundry treating apparatus, and
a valve configured to control opening and closing of the water discharge pipe; and

a pump including:
a pump housing that defines a space to store water,
a first connection pipe configured to guide water from the water collector to the pump housing,
a second connection pipe configured to guide water from the space of the pump housing to the water ejector,
a third connection pipe that is separate from the second connection pipe and that is configured to guide water from the space of the pump housing to the water flow-path controller,
an impeller that is located inside the pump housing and that is configured to rotate, and
an impeller driver configured to rotate the impeller.

2. The apparatus of claim 1 , further comprising a discharge hole that extends through a bottom face of the pump housing, wherein an end of the third connection pipe is connected to the discharge hole.

3. The apparatus of claim 1 , wherein the valve includes:
a valve body that is located inside the controller housing and that divides the space of the controller housing into (i) a first space that communicates with the third connection pipe and (ii) a second space that communicates with the water discharge pipe;
a valve body through-hole that extends through the valve body and that enables water to flow to the water discharge pipe, the valve body being configured to open or close the valve body through-hole based on a pivoting angle of the valve body; and
a valve body driver configured to activate a pivoting motion of the valve body to open or close the valve body through-hole.

4. The apparatus of claim 1 , further comprising a water flow-path switch that includes:
a switch housing that defines a space to store water;
a switch inlet configured to introduce water supplied from the pump through the second connection pipe into the switch housing;
a water ejector supply pipe configured to guide water from inside the switch housing to the water ejector;
a discharger supply pipe configured to guide water from inside the switch housing to the water discharge pipe; and
a switch valve configured to control opening and closing of the water ejector supply pipe and opening and closing of the discharger supply pipe.

5. The apparatus of claim 4 , wherein the switch valve includes:
a switch body that is located inside the switch housing and that divides a space of the switch housing into a first space that communicates with the switch inlet and a second space that communicates with the water ejector supply pipe and the discharger supply pipe;
a switch body through-hole that extends through the switch body and that enables water to flow to the water ejector supply pipe and the discharger supply pipe, the switch body being configured to open or close the switch body through-hole based on a pivoting angle of the switch body; and
a switch body driver configured to activate a pivoting motion of the switch body to open or close the switch body through-hole.

6. The apparatus of claim 5 , wherein a bottom end of the water discharge pipe is positioned at a level lower than a level of a bottom end of the third connection pipe.

7. The apparatus of claim 5 , wherein the water discharge pipe is inclined downwards as the water discharge pipe extends in a direction away from the controller housing.

8. The apparatus of claim 5 , wherein the controller housing is positioned at a lower level than a level of the pump housing.

9. The apparatus of claim 8 , further comprising:
a first through-hole that extends through a rear face of the cabinet, wherein the water discharge pipe is inserted into the first through-hole; and
a communication pipe that is located at the water discharge pipe, wherein the discharger supply pipe is connected to the communication pipe,
wherein the communication pipe is located inside the cabinet and is oriented perpendicular to the water discharge pipe along a height direction of the cabinet.

10. The apparatus of claim 8 , further comprising:
a first through-hole that extends through a rear face of the cabinet, wherein the water discharge pipe is inserted into the first through-hole; and
a second through-hole that extends through the rear face of the cabinet, wherein the water flow-path controller further comprises a water supply pipe that is connected to the third connection pipe and that is configured to guide water into the controller housing, the water supply pipe being inserted into the second through-hole; and
a communication pipe that is located at the water discharge pipe, wherein the discharger supply pipe is connected to the communication pipe,
wherein the communication pipe is located inside the cabinet and is oriented perpendicular to the water supply pipe along a height direction of the cabinet.

11. The apparatus of claim 10 , wherein the water discharge pipe and the water supply pipe are oriented parallel to each other.

12. The apparatus of claim 5 , wherein the valve includes:
a valve body that is located inside the controller housing;
a valve body through-hole that extends through the valve body and that enables water to flow to the water discharge pipe, the valve body being configured to open or close the valve body through-hole based on a pivoting angle of the valve body; and
a valve body driver configured to activate a pivoting motion of the valve body to open or close the valve body through-hole, and
wherein the valve body driver is configured to, based on the switch body pivoting to open the water ejector supply pipe and close the discharger supply pipe, activate a pivoting motion of the valve body to close the water discharge pipe.

13. The apparatus of claim 12 , wherein the valve body driver is configured to, based on the switch body pivoting to close the water ejector supply pipe and open the discharger supply pipe, activate a pivoting motion of the valve body to close the water discharge pipe.

14. The apparatus of claim 13 , wherein the valve body driver is configured to, based on termination of operation of the heat-exchanger and the impeller driver, activate a pivoting motion of the valve body to open the water discharge pipe.

15. The apparatus of claim 8 , wherein the water flow-path controller further comprises a water supply pipe connected to the third conn

Assignees

• Lg Electronics Inc

Inventors

• Lee Youngjae
• Cho Kichul

Classifications

• F28G9/00

  Cleaning by flushing or washing, e.g. with chemical solvents (appliances using jets of fluid for removing debris F28G1/16, F28G3/16) · CPC title

• F04D29/007

  especially adapted for liquid pumps · CPC title

• D06F58/02

  having dryer drums rotating about a horizontal axis · CPC title

• D06F37/263

  assembled from at least two elements connected to each other; Connecting or sealing means therefor · CPC title

• D06F39/04

  Heating arrangements · CPC title