Laundry washing machine

Patent metadata

Field	Value
Publication number	US-11530507-B2
Application number	US-202117369353-A
Country	US
Kind code	B2
Filing date	Jul 7, 2021
Priority date	Jul 10, 2020
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

A laundry washing machine comprising: a cabinet; a tub inside the cabinet and comprising a first and second shells fixed together and defining a sump at a bottom region of the tub; a rotatable drum in the tub; a draining circuit fluidly connected to the sump for draining liquid from the bottom of the latter; a level detection device configured for detecting the level of liquid within the tub and comprising an air chamber having a liquid inlet provided at the sump and in fluid communication with the internal of the latter; and a recirculation circuit configured for withdrawing liquid from the tub and to re-admit such a liquid into the tub through an outlet opening positioned in the sump. The outlet opening of the recirculation circuit and the liquid inlet of the level detection device are located one on the first shell and the other on second shell.

First claim

The invention claimed is:

1. A laundry washing machine comprising:
a cabinet;
a tub housed inside said cabinet, said tub comprising a first shell and a second shell fixed together and defining a sump at a bottom region of said tub;
a drum contained in said tub and rotatable about a rotation axis;
a draining circuit fluidly connected to said sump and configured to drain liquid from the sump;
a level detection device configured to detect a level of liquid within said tub, said level detection device comprising an air chamber having a liquid inlet provided at said sump and in fluid communication with an internal volume of the sump; and
a recirculation circuit configured to withdraw liquid from said tub and to re-admit said liquid into said tub through an outlet opening positioned in said sump;
wherein one of said outlet opening of said recirculation circuit and said liquid inlet of said level detection device is located on said first shell, and the other of said outlet opening of said recirculation circuit and said liquid inlet is located on said second shell.

2. The laundry washing machine according to claim 1 , wherein said cabinet defines a support plane on which said laundry washing machine is configured to lay, wherein said liquid inlet of said level detection device and said outlet opening of said recirculation circuit are located both on a same half-space with respect to a middle plane passing through said rotation axis of said drum and perpendicular to said support plane.

3. The laundry washing machine according to claim 2 , wherein a point or points of the surface on which said liquid inlet of said level detection device lays having a shortest distance from said middle plane has/have a first distance from said middle plane, and a point or points of the surface on which said outlet opening of said recirculation circuit lays having a shortest distance from said middle plane has/have a second distance from said middle plane, wherein said first distance is different from said second distance.

4. The laundry washing machine according to claim 1 , wherein a point or points of the surface on which said liquid inlet of said level detection device lays having a lowest height with respect to said support plane has/have a first height with respect to said support plane, and a point or points of the surface on which said outlet opening of said recirculation circuit lays having a lowest height with respect to said support plane has/have a second height with respect to said support plane, wherein said first height is different from said second height.

5. The laundry washing machine according to claim 4 , wherein said first height is greater than said second height.

6. The laundry washing machine according to claim 1 , wherein said outlet opening of said recirculation circuit is configured to supply, within said sump, a jet of liquid having a direction of exit from said outlet opening, wherein the direction if exit is substantially rectilinear and targets away from said liquid inlet of said level detection device.

7. The laundry washing machine according to claim 1 , further comprising one or more conveying elements configured to channel a liquid from an internal volume of said sump to said liquid inlet of said level detection device.

8. The laundry washing machine according to claim 7 , wherein said one or more conveying elements comprise a first portion of a lateral wall of said sump, connected to a border of said liquid inlet, and inclined towards the external of said sump to define, with respect to a remainder of said lateral wall, a lateral recess fluidly connecting the internal volume of said sump to said liquid inlet.

9. The laundry washing machine according to claim 1 , wherein said sump comprises a partition wall positioned between said liquid inlet and said outlet opening of said recirculation circuit in such a way that a straight line connecting any point of the surface on which said outlet opening lays to any point of the surface on which said liquid inlet lays crosses said partition wall.

10. The laundry washing machine according to claim 8 , wherein:
said sump comprises a partition wall positioned between said liquid inlet and said outlet opening of said recirculation circuit in such a way that a straight line connecting any point of the surface on which said outlet opening lays to any point of the surface on which said liquid inlet lays crosses said partition wall; and
said partition wall defines an upper wall of said lateral recess.

11. The laundry washing machine according to claim 1 , wherein said first shell comprises a first flange, and said second shell comprises a second flange, fixed to said first flange, wherein said air chamber of said level detection device is defined between a first wall belonging to said first flange and a second wall belonging to said second flange.

12. The laundry washing machine according to claim 11 , further comprising a through-hole, provided at said first wall and/or second wall, fluidly connecting an internal volume of said air chamber to a connecting element protruding, respectively, from said first wall and/or second wall towards the external of said air chamber, and fluidly connected or connectable to a sensing element of said level detection device.

13. The laundry washing machine according to claim 1 , further comprising a nozzle, at least partially protruding from one between said first shell and said second shell towards the internal of said sump, wherein said outlet opening of said recirculation circuit is provided at the outlet of said nozzle.

14. The laundry washing machine according to claim 1 , further comprising one or more guiding elements configured to channel towards said bottom of said sump and/or towards said middle plane, a jet of liquid coming from said outlet opening of said recirculation circuit.

15. The laundry washing machine according to claim 14 , wherein said one or more guiding elements comprise a second portion of said lateral wall of said sump shaped and/or positioned in such a way to receive a jet of liquid coming from said outlet opening and to channel said jet towards said bottom of said sump and/or towards said middle plane.

Assignees

• Electrolux Appliances AB

Inventors

• Perosa Vittorio
• Bruna Alessandro

Classifications

• D06F39/088

  Liquid supply arrangements · CPC title

• D06F37/261

  Tubs made by a specially selected manufacturing process or characterised by their assembly from elements · CPC title

• D06F39/085

  Arrangements or adaptations of pumps · CPC title

• D06F39/087 Primary

  Water level measuring or regulating devices · CPC title

• D06F37/267

  Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups (D06F37/206 takes precedence) · CPC title