Dishwasher

• US 10,076,224 B2
• Filed: 01/20/2014
• Issued: 09/18/2018
• Est. Priority Date: 01/20/2014
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Poojary, Praveen, Tuller, Barry E., Vanderroest, Chad T.
• Primary Examiner(s): Bell, Spencer E
• Application Number:
  US14/159,021
• Publication Number:
  US 20150201823A1
• Time in Patent Office: 1,702 Days
• CPC Class Codes: A47L 15/16 with rigidly-mounted spraying devices
• CPC Class Codes: A47L 15/4219 Water recirculation A47L15/0078 takes precedence
• CPC Class Codes: A47L 15/428 Rotary nozzles

Abstract

A dishwasher for treating dishes includes a tub at least partially defining a treating chamber, a spraying system having a manifold with at least one sprayer for spraying wash liquid into the treating chamber, and a recirculation system for recirculating liquid sprayed in the treating chamber to the spraying system. The sprayer of the manifold has multiple apertures which are configured to emit liquid to different areas of the treating chamber.

Claims

1. A dishwasher comprising:

a tub at least partially defining a treating chamber and having an open face providing access to the treating chamber and a sump;

a door selectively closing the open face;

a lower dish rack located within the treating chamber;

an upper dish rack located within the treating chamber above the lower dish rack;

a spraying system comprising;

a lower rotating sprayer located within the treating chamber beneath the lower dish rack;

an upper rotating sprayer located within the treating chamber beneath the upper dish rack; and

a manifold located within the treating chamber and having a first sprayer comprising a face defining a periphery, wherein the first sprayer includes at least one first aperture disposed on a lower portion of the periphery and at least one second aperture disposed on the face of the first sprayer; and

a recirculation system for recirculating liquid sprayed in the treating chamber from the sump to the spraying system;

wherein the at least one first aperture is configured to emit a spray of liquid at a first trajectory along a substantially downward angle relative to the first sprayer such that it is configured to be directly sprayed into a first zone in the lower dish rack and the at least one second aperture is configured to emit a second trajectory spray of liquid that is along a substantially outward curve relative to the first sprayer such that it is configured to arc into the lower dish rack into a second zone, different than the first zone.

2. The dishwasher of claim 1, wherein more than one aperture of the at least one first aperture is configured to emit a spray of liquid directly onto a dish adjacent to the manifold in the lower dish rack and more than one aperture of the at least one second aperture is configured to emit an arcing spray of liquid over the dish adjacent to the manifold in the lower dish rack.

3. The dishwasher of claim 1, wherein the upper dish rack has four corners and the first sprayer includes at least one third aperture disposed on an upper portion of the periphery and configured to emit a spray of liquid upwardly into at least one of the four corners of the upper dish rack.

4. The dishwasher of claim 1 and further comprising a silverware basket located in the lower dish rack, wherein the at least one first aperture is configured to emit a spray of liquid directly into the silverware basket such that it directly sprays onto a dish located in the silverware basket.

5. The dishwasher of claim 1, wherein the manifold is provided between the lower and upper dish racks.

6. The dishwasher of claim 1, wherein the tub comprises at least one side wall connected to a rear wall, and the manifold extends along at least one of the side wall and the rear wall.

7. The dishwasher of claim 6, wherein the manifold extends along both of the side wall and the rear wall.

8. The dishwasher of claim 7, wherein the manifold further comprises a second sprayer with multiple apertures fluidly coupled to the recirculation system, wherein one of the first and second sprayers is provided on the rear wall and the other of the first and second sprayers is provided on the side wall.

9. The dishwasher of claim 8, wherein the manifold further comprises a third sprayer with multiple apertures fluidly coupled to the recirculation system, and the third sprayer is provided on the rear wall.

10. The dishwasher of claim 1, wherein the recirculation system comprises a supply tube coupled to the sump and extending to the manifold.

11. The dishwasher of claim 10, wherein the manifold defines a passageway, and the at least one first and at least one second apertures are fluidly coupled to the supply tube via the passageway.

12. The dishwasher of claim 10, wherein the supply tube further extends to the upper rotating sprayer.

13. The dishwasher of claim 12, wherein the supply tube comprises a first passage extending to the manifold and a second passage extending to the upper rotating sprayer.

14. The dishwasher of claim 13 and further comprising a valve configured to direct a flow of wash liquid either to the first passage or the second passage.

15. The dishwasher of claim 12, wherein the recirculation system further comprises a pump assembly and the supply tube extends rearwardly from the pump assembly to a rear wall of the tub and upwardly to supply liquid to the manifold and the upper rotating sprayer.

16. The dishwasher of claim 10, wherein the manifold comprises two opposing portions configured to selectively receive liquid through the supply tube and the two opposing portions are positioned on opposite sides of the supply tube, with each portion extending laterally from the supply tube.

17. The dishwasher of claim 16 wherein the manifold further comprises a second sprayer with multiple apertures fluidly coupled to the recirculation system, and the first and second sprayers are located on a different one of the two opposing portions.

18. The dishwasher of claim 1, and further comprising a cover extending over the manifold, wherein the first sprayer is provided on an exterior of the cover.

19. The dishwasher of claim 1, wherein the first sprayer is rotatably mounted to the manifold and is configured to rotate relative to the manifold by emission of liquid from the at least one first and at least one second apertures.

20. The dishwasher of claim 1, wherein the first sprayer is fixedly mounted to the manifold and is configured to remain stationary relative to the manifold when liquid is emitted from the at least one first and at least one second apertures.

21. The dishwasher of claim 1, wherein the lower and upper rotating sprayers each comprise at least one rotating spray arm.

22. The dishwasher of claim 1, wherein the lower and upper rotating sprayers each comprise multiple rotating spray discs.

23. The dishwasher of claim 1 wherein the spray of liquid at the first trajectory does not intersect the spray of liquid at the second trajectory in the lower dish rack.

24. The dishwasher of claim 1, wherein the manifold further comprises a second sprayer with multiple apertures, wherein the first sprayer is located on a first side of the lower dish rack and the second sprayer is located on a second side of the lower dish rack opposite the first side.

25. The dishwasher of claim 24, wherein at least one of the multiple apertures of the second sprayer is configured to emit an arcing spray of liquid into the lower dish rack, with the arcing sprays of liquid from the first sprayer and the second sprayer at least reaching a middle of the lower dish rack.

26. The dishwasher of claim 1, wherein the face defines a planar surface and the periphery includes a surface intersecting the face at an angle.