Washing machine and washing method

• US 9,284,674 B2
• Filed: 12/06/2010
• Issued: 03/15/2016
• Est. Priority Date: 12/07/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Soonan, Kim, Yongtae, Cho, Kichul
• Primary Examiner(s): Kornakov, Michael
• Assistant Examiner(s): Lorenzi, Marc
• Application Number:
  US12/961,230
• Publication Number:
  US 20110131735A1
• Time in Patent Office: 1,926 Days
• Field of Search: 682/08, 340/605, 248/678
• US Class Current: 1/1
• CPC Class Codes: A47L 15/4212 Detection of water leaks; Collection of leaked water, e.g. in the casing
• CPC Class Codes: D06F 2103/00 Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
• CPC Class Codes: D06F 2105/48 Drum speed
• CPC Class Codes: D06F 33/47 Responding to irregular working conditions, e.g. malfunctioning of pumps safety arrangements D06F37/42
• CPC Class Codes: D06F 34/14 Arrangements for detecting or measuring specific parameters
• CPC Class Codes: D06F 39/081 Safety arrangements for preventing water damage

Abstract

Provided are a washing machine and a washing method. The washing machine includes a cabinet, an outer tub disposed in the cabinet and provided with an opened top through which wash water is supplied into the outer tub, an inner tub that is disposed in the outer tub to receive laundry and rotates about a vertical axis, a base that supports the cabinet and stores the wash water that is splattered from the outer tub by rotation of the inner tub, and an electrode sensor that is disposed on the base to detect the wash water splattered out of the outer tub.

Claims

1. A washing machine comprising:

a cabinet;

an outer tub disposed in the cabinet and provided with an opened top through which wash water supplied into the outer tub;

an inner tub that is disposed in the outer tub to receive laundry and rotates about a vertical axis;

an electrode sensor comprising first and second electrodes; and

a base that supports the cabinet, the base comprising

a downwardly inclined surface, said inclined surface terminating downwardly in a vertical wall;

a level surface raised with respect to a bottom of the base having a groove in which the wash water splattered out of the outer tub and flowing down along the inclined surface is collected;

a bracket for fixing the electrode sensor provided on the level surface, the bracket being on the outside of the groove; and

a first rib protruding from the level surface,

wherein a perimeter of the level surface is partially bounded by the first rib and the vertical wall,

wherein the first and second electrodes are mounted to the bracket and arranged inside the groove, and

wherein a gap for discharging an overflow of the wash water from the groove to outside the level surface is formed between an end of the first rib and the electrode sensor.

2. The washing machine of claim 1, further comprising a control unit that, when the wash water splattered to the base is detected by the electrode sensor during the forming of centrifugal water circulation formed by the wash water that rises along a space defined between the outer and inner tubs by continuous rotation of the inner tub in a direction and is poured into the inner tub, reduces an RPM of the inner tub such that a rising height of the wash water rising along the space between the inner and outer tubs is lower than an upper end of the inner tub.

3. The washing machine of claim 1, wherein the base further comprises a second rib protruding from the inclined surface, the second rib extending along an inclined direction to limit flow of the wash water flowing along the inclined surface in a lateral direction.

4. The washing machine of claim 1, wherein the first and second electrodes are spaced apart from each other, and

wherein the first and second electrodes are spaced apart from a bottom surface of the groove.

5. The washing machine of claim 4, wherein the first and second electrodes are disposed in parallel with the bottom surface of the groove.

6. The washing machine of claim 4, wherein the first and second electrodes are disposed to be vertical to the bottom surface of the groove.

7. The washing machine of claim 1,

wherein the base further comprises a first water storage unit that is formed along a circumference of the base to collect the splattered water flowing down along an inner surface of the cabinet,

wherein the first water storage unit has an elevated surface which guides wash water splattered thereon downwards,

wherein a cylindrical coupling portion protrudes from the elevated surface, and

wherein a coupling member for fixing the cabinet is coupled to the cylindrical coupling portion by being inserted into the cylindrical coupling portion along a longitudinal direction of the cylindrical coupling portion.

8. The washing machine of claim 1, further comprising a back panel coupled to a rear portion of the cabinet and provided with an air hole communicating with an inside of the cabinet, wherein the back panel comprises a splattered water guide that extends from an upper portion of the air hole toward the inside of the cabinet and is inclined downward toward the inside of the cabinet to prevent the splattered water from leaking to an external side through the air hole.

9. The washing machine of claim 8, wherein the splattered water guide is formed by bending a part that is partly cut from the back panel toward the inside of the cabinet to form the air hole.

10. The washing machine of claim 1, wherein the base has a central opening and a third rib is formed along a circumference of the central opening.

11. The washing machine of claim 1, wherein the electrode sensor is disposed at a left side of a rear portion of the base.

12. The washing machine of claim 1, wherein the electrode sensor is disposed at a right side of a rear portion of the base and the inner tub rotates clockwise when the centrifugal water circulation that is formed by the wash water that rises along a space defined between the outer and inner tubs by continuous rotation of the inner tub in a direction and is poured into the inner tub is formed.