Dishwasher

• US 8,753,454 B2
• Filed: 03/15/2013
• Issued: 06/17/2014
• Est. Priority Date: 06/17/2003
• Status: Expired due to Term

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: VanderRoest, Chad T., Landsiedel, Jay C., Carlson, Christopher J., Gurubatham, Vincent P., Thies, Edward L.
• Primary Examiner(s): Chaudhry, Saeed T
• Application Number:
  US13/834,187
• Publication Number:
  US 20130199583A1
• Time in Patent Office: 459 Days
• Field of Search: 134/56.D, 134/57.D, 134/177, 134/178, 134/198, 134/200
• US Class Current: 134/56.D
• 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 15/4221 Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms A47L15/0078 takes precedence
• CPC Class Codes: A47L 15/4278 Nozzles

Abstract

A dishwasher having a tub defining a wash chamber and at least one dish rack located within the wash chamber. The dishwasher also has at least one spray arm located in the wash chamber and at least one nozzle located in the wash chamber and configured to provide a spray of liquid into the dish rack. A diverter valve controls the supply of liquid from a liquid supply to the at least one nozzle.

Claims

1. A dishwasher comprising:

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

a door selectively closing the open face;

a lower dish rack located within the wash chamber;

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

a lower rotating spray arm located within the wash chamber beneath the lower dish rack;

an upper rotating spray arm located within the wash chamber beneath the upper dish rack;

at least one nozzle having at least one aperture located in the wash chamber adjacent the lower dish rack;

a liquid supply providing liquid to the lower rotating spray arm, upper rotating spray arm and the at least one nozzle;

a diverter valve selectively fluidly coupling the liquid supply to the upper rotating spray arm and the at least one nozzle; and

wherein actuation of the diverter valve controls the supply of liquid from the liquid supply to one of the upper rotating spray arm or the at least one nozzle during the supply of liquid from the liquid supply to the lower rotating spray arm.

2. The dishwasher of claim 1, wherein the at least one nozzle is configured to emit liquid at a greater speed than the upper and lower rotating spray arms.

3. The dishwasher of claim 1, wherein the at least one nozzle is configured to emit liquid at more volume per area than the upper and lower rotating spray arms.

4. The dishwasher of claim 1, wherein the at least one nozzle is located toward a rear of the tub.

5. The dishwasher of claim 1, wherein the liquid supply further comprises a manifold configured to supply liquid to the at least one nozzle.

6. The dishwasher of claim 1, wherein the liquid supply further comprises a pump assembly and a supply tube extending rearwardly from the pump assembly to a rear wall of the tub and upwardly to supply liquid to the upper rotating spray arm, wherein the valve is configured to direct the flow of wash liquid either through the supply tube to the upper rotating spray arm or through the at least one nozzle.

7. The dishwasher of claim 1 wherein the liquid supply comprises a first liquid supply to the lower rotating spray arm, a second liquid supply to the upper rotating spray arm, and a third liquid supply to the at least one nozzle, wherein the valve is configured to divert the flow of liquid through the second and third liquid supplies during the supply of liquid to the first liquid supply.

8. The dishwasher of claim 7 wherein the liquid supply comprises a supply tube providing liquid to the second and third liquid supplies and the valve is located at a junction of the supply tube with the second and third liquid supplies.

9. The dishwasher of claim 8 wherein the supply tube provides liquid to the first liquid supply and the valve is located downstream of the first liquid supply.

10. The dishwasher of claim 9 wherein the supply tube extends from the valve to the upper rotating spray arm to form the second liquid supply.

11. The dishwasher of claim 8 further comprising a conduit fluidly coupling the diverter valve to the at least one nozzle to form the third liquid supply.

12. The dishwasher of claim 11 wherein the conduit extends laterally from the supply tube.

13. The dishwasher of claim 1 wherein the at least one nozzle is rotatable.

14. The dishwasher of claim 13 wherein the at least one nozzle has a substantially circular shape.

15. The dishwasher of claim 14 wherein the at least one nozzle has multiple apertures.

16. The dishwasher of claim 15 wherein at least some of the multiple apertures are located near the periphery of the substantially circular shape.

17. The dishwasher of claim 15 wherein at least some of the multiple apertures are oriented to rotate the nozzle in response to the sprayed liquid.

18. The dishwasher of claim 1 wherein the diverter valve is located below the lower dish rack.

19. The dishwasher of claim 18 wherein the diverter valve is located adjacent a lower wall of the tub.

20. The dishwasher of claim 19 wherein the diverter valve is located in a rear half of the tub.

21. The dishwasher of claim 1 wherein the actuation of the diverter valve diverts substantially all of the liquid supplied to one of the upper rotating spray arm and the at least one nozzle to the other of the upper rotating spray arm and the at least one nozzle.

22. The dishwasher of claim 1 further comprising an actuator configured to actuate the diverter valve.

23. The dishwasher of claim 1 wherein the supply of liquid to the at least one nozzle is responsive to a selection of a customized cycle of operation utilizing the at least one nozzle.

24. The dishwasher of claim 23 wherein the customized cycle of operation comprises a heavy soil cycle of operation.

25. The dishwasher of claim 1 wherein the at least one nozzle is located beneath the lower dish rack.

26. The dishwasher of claim 1 wherein the at least one nozzle is located below the lower rotating spray arm.

27. A dishwasher comprising:

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

a door selectively closing the open face;

a first dish rack located within the wash chamber;

a second dish rack located within the wash chamber in a stacked relationship with the first dish rack;

a first sprayer located within the wash chamber beneath the first dish rack and configured to direct a spray of liquid into the first dish rack;

a second sprayer located within the wash chamber beneath the second dish rack and configured to direct a spray of liquid into the second dish rack;

at least one nozzle having at least one aperture located in the wash chamber adjacent one of the first and second dish racks and configured to direct a spray of liquid into the one of the first and second dish racks;

a liquid supply providing liquid to the first sprayer, second sprayer and the at least one nozzle;

a diverter valve selectively fluidly coupling the liquid supply to the second sprayer and the at least one nozzle; and

wherein actuation of the diverter valve diverts the liquid from the liquid supply to one of the second sprayer or the at least one nozzle, during the supply of liquid from the liquid supply to the first sprayer.

28. The dishwasher of claim 27, wherein the at least one nozzle is configured to emit liquid at a greater speed than the first and second sprayers.

29. The dishwasher of claim 27, wherein the at least one nozzle is configured to emit liquid at more volume per area than the first and second sprayers.

30. The dishwasher of claim 27, wherein the at least one nozzle is located toward a rear of the tub.

31. The dishwasher of claim 27, wherein the liquid supply further comprises a manifold configured to supply liquid to the at least one nozzle.

32. The dishwasher of claim 27, wherein the liquid supply further comprises a pump assembly and a supply tube extending rearwardly from the pump assembly to a rear wall of the tub and upwardly to supply liquid to the first sprayer, wherein the valve is configured to direct the flow of wash liquid either through the supply tube to the second sprayer or through the at least one nozzle.

33. The dishwasher of claim 27, wherein the liquid supply comprises a first liquid supply to the first sprayer, a second liquid supply to the second sprayer, and a third liquid supply to the at least one nozzle, wherein the valve is configured to divert the flow of liquid from the liquid supply to either the second and third liquid supplies during the supply of liquid from the liquid supply to the first liquid supply.

34. The dishwasher of claim 33, wherein the liquid supply comprises a supply tube providing liquid to the second and third liquid supplies and the valve is located at a junction of the supply tube with the second and third liquid supplies.

35. The dishwasher of claim 34, wherein the supply tube provides liquid to the first liquid supply and the valve is located downstream of the first liquid supply.

36. The dishwasher of claim 35, wherein the supply tube extends from the valve to the first sprayer to form the second liquid supply.

37. The dishwasher of claim 34, further comprising a conduit fluidly coupling the diverter valve to the at least one nozzle to form the third liquid supply.

38. The dishwasher of claim 37, wherein the conduit extends laterally from the supply tube.

39. The dishwasher of claim 27, wherein the at least one nozzle is rotatable.

40. The dishwasher of claim 39, wherein the at least one nozzle has a substantially circular shape.

41. The dishwasher of claim 40, wherein the at least one nozzle has multiple apertures.

42. The dishwasher of claim 41, wherein at least some of the multiple apertures are located near the periphery of the substantially circular shape.

43. The dishwasher of claim 41, wherein at least some of the multiple apertures are oriented to rotate the nozzle in response to the sprayed liquid.

44. The dishwasher of claim 27, wherein the diverter valve is located below the one of the first and second dish racks.

45. The dishwasher of claim 44, wherein the diverter valve is located adjacent a lower wall of the tub.

46. The dishwasher of claim 45, wherein the diverter valve is located in a rear half of the tub.

47. The dishwasher of claim 27, wherein the actuation of the diverter valve diverts substantially all of the liquid supplied to one of the second sprayer and the at least one nozzle to the other of the second sprayer and the at least one nozzle.

48. The dishwasher of claim 27, further comprising an actuator configured to actuate the diverter valve.

49. The dishwasher of claim 27, wherein the supply of liquid to the at least one nozzle is responsive to a selection of a customized cycle of operation utilizing the at least one nozzle.

50. The dishwasher of claim 49, wherein the customized cycle of operation comprises a heavy soil cycle of operation.

51. The dishwasher of claim 27 wherein the at least one nozzle is located beneath the one of the first and second dish racks.

52. The dishwasher of claim 27 wherein the at least one nozzle is located below the one of the first and second sprayers corresponding to the one of the first and second dish racks.