Dishwasher filter assembly

Patent metadata

Field	Value
Publication number	US-11622667-B2
Application number	US-202017084267-A
Country	US
Kind code	B2
Filing date	Oct 29, 2020
Priority date	Sep 29, 2017
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

A dishwasher includes a tub with an access opening to a treating chamber, a sump, at least one sprayer emitting liquid into the treating chamber, a pump, a conduit fluidly coupling the sump to the pump and the pump to the at least one sprayer, thereby defining a recirculation circuit through which the liquid sprayed into the treating chamber collects in the sump and is pumped back to the at least one sprayer. The dishwasher also includes a filter assembly in the sump for filtering the liquid in the recirculation circuit including a cleaning element and a dome shaped displacement body positioned adjacent the filter wall for raising a liquid level within the filter and configured to fill more than 50% of a percentage of a volume of the filter.

First claim

The invention claimed is:

1. A dishwasher comprising:
a tub at least partially defining a treating chamber with an access opening;
a sump fluidly coupled to the treating chamber;
at least one sprayer emitting liquid into the treating chamber;
a pump;
a conduit fluidly coupling the sump to the pump and the pump to the at least one sprayer, thereby defining a recirculation circuit through which the liquid sprayed into the treating chamber collects in the sump and is pumped back to the at least one sprayer;
a filter assembly provided in the sump and filtering the liquid in the recirculation circuit and comprising a filter having a filter wall through which the liquid passes;
a cleaning element in contact with the filter wall; and
a dome shaped displacement body positioned adjacent the filter wall for raising a liquid level within the filter and configured to fill more than 50% of a percentage of a volume of the filter, and further configured to rotate the filter wall.

2. The dishwasher of claim 1 , wherein the filter wall comprises a first end and second end and with an inside and outside surface extending between the first and second end through which the liquid passes.

3. The dishwasher of claim 2 , wherein the filter is rotatable.

4. The dishwasher of claim 2 , wherein the cleaning element extends vertically between the first and second end of the filter wall.

5. The dishwasher of claim 4 , wherein the cleaning element is in rotating contact with the filter wall.

6. The dishwasher of claim 1 , further comprising a rotary driver coupled to the displacement body for rotating the displacement body.

7. The dishwasher of claim 6 further comprising bristles protruding from the cleaning element and penetrating at least a portion of the filter wall.

8. The dishwasher of claim 1 , further comprising one of a cleaning roller, brush, or scraper secured to the displacement body.

9. The dishwasher of claim 8 , further comprising protruding bristles from the brush and protruding at least a portion of the filter wall.

10. The dishwasher of claim 1 , wherein the displacement body is one of hollow or an air dome.

11. The dishwasher of claim 1 further comprising a rotary driver for rotating one of the filter wall or cleaning element.

12. The dishwasher of claim 11 further comprising a shaft coupling the rotary driver to one of the cleaning element or filter wall.

13. The dishwasher of claim 12 further comprising a gear reducing system coupling the shaft to the rotary driver.

14. The dishwasher of claim 11 wherein the rotary driver drives rotation of the filter wall which drives rotation of the cleaning element about an outer surface of the filter wall.

15. The dishwasher of claim 11 wherein the rotary driver drives rotation of the cleaning element which drives rotation of the filter wall.

16. The dishwasher of claim 11 wherein the rotary driver is a dishwasher spray arm.

17. The dishwasher of claim 11 wherein one of the cleaning element or filter wall rotates between about 1 to 4 revolutions per minute.

18. The dishwasher of claim 1 wherein the filter wall is a mesh screen.

Assignees

• Whirlpool Co
• Whirlpool Co

Inventors

• Feddema Mark S
• Rappette Antony Mark
• Fehner Lisa M

Classifications

• B01D33/073

  arranged for inward flow filtration · CPC title

• A47L15/4206

  Tubular filters · CPC title

• B01D33/461

  brushes · CPC title

• B01D33/46

  by scrapers, brushes {nozzles} or the like acting on the cake-side of the filtering element {(B01D33/503 takes precedence)} · CPC title

• A47L15/46

  Devices for the automatic control of the different phases of cleaning {; Controlling devices (A47L15/449 takes precedence)} · CPC title