Dishwasher having spray manifold

• US 10,499,787 B2
• Filed: 12/18/2017
• Issued: 12/10/2019
• Est. Priority Date: 10/17/2011
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Carlson, Christopher J., Fountain, Jordan R., Rappette, Antony M., Vanderroest, Chad T.
• Primary Examiner(s): Golightly, Eric W
• Application Number:
  US15/845,561
• Publication Number:
  US 20180103824A1
• Time in Patent Office: 722 Days
• Field of Search: None
• CPC Class Codes: A47L 15/16 with rigidly-mounted spraying devices
• CPC Class Codes: A47L 15/22 Rotary spraying devices
• CPC Class Codes: A47L 15/4217 Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
• CPC Class Codes: A47L 15/4219 Water recirculation A47L15/0078 takes precedence
• CPC Class Codes: A47L 15/428 Rotary nozzles
• CPC Class Codes: A47L 15/4282 Arrangements to change or modify spray pattern or direction
• CPC Class Codes: A47L 2501/03 Water recirculation, e.g. control of distributing valves for redirection of water flow

Abstract

A dishwasher includes a tub at least partially forming a treating chamber, a dish rack provided within the wash chamber, and a spray manifold. The spray manifold can have multiple apertures and/or sprayers for emitting wash liquid to define a spray zone.

Claims

1. A dishwasher comprising:

a tub at least partially forming a treating chamber;

a dish rack provided within the treating chamber and defining a utensil zone in which utensils are received for washing;

a spray manifold provided within the treating chamber such that liquid emitted from the spray manifold defines a first spray zone directed toward the utensil zone, the spray manifold comprising;

a first rotating spray head coupled to an exterior surface of the spray manifold and having at least one aperture for emitting liquid;

a second rotating spray head coupled to the exterior surface of the spray manifold and having at least one aperture for emitting liquid;

a first interior flow path that supplies liquid to the first rotating spray head; and

a second interior flow path that supplies liquid to the second rotating spray head;

wherein the first and second interior flow paths are configured to supply liquid to the first and second rotating spray heads, respectively, at the same volumetric flow rate; and

a supply conduit through which liquid is supplied to the spray manifold from a liquid source and comprising an outlet opening in fluid communication with the spray manifold, wherein the outlet opening is off-center relative to the spray manifold.

2. The dishwasher of claim 1, further comprising a spray assembly provided within the treating chamber and emitting liquid to provide a spray within the treating chamber that forms a second spray zone directed toward the utensil zone.

3. The dishwasher of claim 2 wherein the spray assembly comprises a rotating spray arm having at least one nozzle emitting liquid to form the second spray zone.

4. The dishwasher of claim 1 wherein the first and second interior flow paths have the same cross-sectional area.

5. The dishwasher of claim 1 wherein the first and second rotating spray heads define the first spray zone, and each rotating spray head emits liquid at the same volumetric flow rate to create a consistent cleaning effect across the first spray zone.

6. The dishwasher of claim 1 wherein the spray manifold comprises a stationary spray head in fluid communication with the first interior flow path for emitting liquid.

7. The dishwasher of claim 6 wherein the stationary spray head is provided vertically above the first rotating spray head.

8. The dishwasher of claim 7 wherein the dish rack comprises an upper edge and the stationary spray head is provided at least partially above the upper edge.

9. The dishwasher of claim 1 wherein the first and second rotating spray heads each include a plurality of apertures in a peripheral side surface of the spray head configured to spray peripherally from the spray head to produce a driving force to rotate the spray head.

10. The dishwasher of claim 1 wherein the spray manifold comprises at least a first branch and a second branch and wherein the first rotating spray head is provided in the first branch and the second rotating spray head is provided in the second branch.

11. The dishwasher of claim 10 wherein the first and second branches each include at least one stationary spray head disposed vertically above the first and second rotating spray heads, respectively.

12. The dishwasher of claim 10 wherein the first branch includes a third rotating spray head laterally spaced from the first rotating spray head and the second branch includes a fourth rotating spray head laterally spaced from the second rotating spray head.

13. The dishwasher of claim 1 wherein the outlet opening is closer to one of the first and second rotating spray heads than the other of the first and second rotating spray heads.

14. The dishwasher of claim 1 further comprising a flow diverter opposing the outlet opening and dividing the liquid supplied from the supply conduit to the spray manifold.

15. The dishwasher of claim 1 wherein the spray manifold further comprises multiple branches, each branch supplying liquid to at least one of the interior flow paths.

16. The dishwasher of claim 15 wherein the same branch supplies liquid to both the first and second interior flow paths.

17. The dishwasher of claim 16 wherein the spray manifold further comprises a liquid distribution header defining a flow path having an inlet from which extends multiple channels corresponding to the multiple branches, with each of the channels in fluid communication with the corresponding branch.

18. The dishwasher of claim 17 wherein the outlet opening is in fluid communication with the inlet of the liquid distribution header.

19. The dishwasher of claim 18 wherein the outlet opening includes an off-center placement with respect to the liquid distribution header.

20. The dishwasher of claim 16 further comprising a flow diverter opposing the outlet opening and proportionally dividing the liquid supplied from the supply conduit to the multiple branches in proportion to the volumetric flow rate of the multiple branches.