Clothing treatment apparatus

Patent metadata

Field	Value
Publication number	US-12473683-B2
Application number	US-202117916190-A
Country	US
Kind code	B2
Filing date	Apr 1, 2021
Priority date	Apr 1, 2020
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A clothing treatment includes: a cabinet; a door coupled to the cabinet; a tub; a drum provided inside the tub; a driving unit for rotating the drum; a gasket that connects an entrance of the cabinet to an opening of the tub; and a water supply unit for supplying water to the tub. The water supply unit is configured to supply water to the tub to a first water level higher than the lowest part of an inner side surface of the gasket. The driving unit is configured to rotate the drum at a first rotating speed at which a centrifugal force applied to laundry inside the drum is greater than the gravity applied to the laundry at the first water level.

First claim

The invention claimed is:

1 . A clothing treatment apparatus comprising:
a cabinet having an inlet port on a front side; a door coupled to the cabinet to open and close the inlet port; a tub disposed inside the cabinet, having an opening communicating with the inlet port of the cabinet, and providing a space for accommodating water; a drum rotatably provided in the tub and providing a space for accommodating laundry; a driving unit rotating the drum; a gasket connecting the inlet port of the cabinet to the opening of the tub, the gasket having an inner surface providing a laundry access passage; and a water supply unit supplying water to the tub, wherein the water supply unit is configured to supply water to the tub up to a first water level higher than a lowermost portion of the inner surface of the gasket, wherein the driving unit is configured to, in a state in which a water level of the tub is the first water level, rotate the drum at a first rotational speed at which a centrifugal force acting on the laundry in the drum by the rotation of the drum is greater than the gravity acting on the laundry, the driving unit being configured to, based on rotating the drum at the first rotational speed, cause the water in the tub to rise along an inner surface of the tub and flow below the gasket.

2 . The clothing treatment apparatus of claim 1 , wherein the driving unit accelerates the drum to the first rotational speed in a state in which the water level of the tub is the first water level.

3 . The clothing treatment apparatus of claim 2 , wherein the driving unit accelerates the drum to the first rotation speed after passing a second rotation speed slower than the first rotation speed in a section in which the drum is accelerated to the first rotation speed, and
the second rotation speed is a rotation speed at which the laundry in the drum rises above a height corresponding to a rotation center of the drum by the rotation of the drum and then falls apart from the drum.

4 . The clothing treatment apparatus of claim 3 , wherein the driving unit rotates the drum, while maintaining the second rotation speed, in a state in which the water level of the tub is the first water level.

5 . The clothing treatment apparatus of claim 1 , further comprising:
a water level detecting unit detecting a water level of the tub, wherein the driving unit stops the drum after rotating the drum at the first rotation speed, the water level detecting unit detects the water level of the tub in a state in which the drum is stopped, and the water supply unit re-supplies water to the tub up to the first water level when the water level of the tub is lower than the first water level after the drum rotates at the first rotation speed.

6 . The clothing treatment apparatus of claim 5 , wherein the driving unit rotates the drum again at the first rotation speed after the water supply unit re-supplies water to the tub.

7 . The clothing treatment apparatus of claim 1 , wherein the driving unit brakes the drum after rotating the drum at the first rotation speed, and a phase of power applied to the driving unit in a section in which the drum is braked is reversed from a phase of power applied to the driving unit in a section in which the drum rotates at the first rotation speed.

8 . The clothing treatment apparatus of claim 7 , wherein the driving unit, in a state in which the water level in the tub is the first water level, rotates the drum by a rotation angle within a range of 90 degrees to 180 degrees at the first rotation speed and then brakes the drum, and rotation and braking of the drum are repeated alternately.

9 . The clothing treatment apparatus of claim 1 , further comprising:
a circulation pump pumping water discharged from the tub; a nozzle provided in the gasket and having an outlet located in the laundry access passage; and a circulation flow path connecting the circulation pump to the nozzle, wherein the circulation pump is driven when the driving unit rotates the drum.

10 . The clothing treatment apparatus of claim 1 , further comprising:
an induction heater disposed on an outer surface of the tub and heating the drum, wherein the induction heater heats the drum in a state in which water in the tub is drained, and when the induction heater heats the drum, the driving unit rotates the drum.

11 . The clothing treatment apparatus of claim 1 , further comprising a controller configured to control the driving unit,
wherein the controller is configured to control the driving unit to rotate the drum at the first rotational speed in the state in which the water level of the tub is the first water level.

12 . The clothing treatment apparatus of claim 11 , wherein the controller is further configured to, before rotating the drum at the first rotational speed, control the water supply unit to supply the water to the first water level in the tub.

Assignees

• Lg Electronics Inc

Inventors

• Kim Beomjun
• Han Injae
• Hong Sangwook

Classifications

• H05B6/10

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

• D06F25/00

  Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air  (control of washing or of washing and drying D06F33/00, D06F34/00; domestic laundry dryers D06F58/00) · CPC title

• D06F33/43

  Control of cleaning or disinfection of washing machine parts, e.g. of tubs · CPC title

• D06F58/45

  Cleaning or disinfection of machine parts, e.g. of heat exchangers or filters · CPC title

• D06F58/26

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