Method of operating a dishwasher

• US 8,574,373 B2
• Filed: 06/29/2011
• Issued: 11/05/2013
• Est. Priority Date: 06/29/2011
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Delgado, Kristopher L., Tuller, Barry E.
• Primary Examiner(s): Kornakov, Michael
• Assistant Examiner(s): DUNLAP, CAITLIN NOELLE DENNI
• Application Number:
  US13/171,909
• Publication Number:
  US 20130000673A1
• Time in Patent Office: 860 Days
• Field of Search: 134/18, 134/25.2, 134/29, 134/57.D, 134/57.DL, 134/56.D, 134/58.D, 134/58.DL
• US Class Current: 134/25.2
• CPC Class Codes: A47L 15/0047 Energy or water consumption, e.g. by saving energy or water
• CPC Class Codes: A47L 15/4291 Recovery arrangements, e.g. for the recovery of energy or water
• CPC Class Codes: A47L 2401/09 Water level
• CPC Class Codes: A47L 2401/20 Time, e.g. elapsed operating time
• CPC Class Codes: A47L 2501/02 Water discharge, e.g. opening or closure of discharge valve
• CPC Class Codes: A47L 2501/03 Water recirculation, e.g. control of distributing valves for redirection of water flow

Abstract

A method of operating a dishwasher includes storing wash liquid in a portion of the spray system of the dishwasher for subsequent reuse. The spray system can include one or more supply conduits, and wash liquid can be alternatively supplied to the supply conduits to store the wash liquid in at least one of the supply conduits.

Claims

1. A method of operating a dishwasher having a treating chamber supplied with wash liquid by a spray system having multiple, independent supply conduits each terminating in at least one sprayer, the method comprising:

introducing wash liquid into the treating chamber;

recirculating the wash liquid from the treating chamber to the spray system;

while recirculating the wash liquid, actuating a diverter valve to sequentially fluidly couple the recirculating wash liquid to sequential ones of the supply conduits to sequentially supply the recirculated wash liquid to the supply conduits to store the wash liquid in all of the supply conduits;

terminating the recirculation of wash liquid when a predetermined amount of wash liquid is stored;

actuating the diverter valve such that the stored wash liquid is retained in all of the supply conduits when the recirculation of the wash liquid is terminated; and

draining any remaining wash liquid from a sump of the treating chamber.

2. The method of claim 1, wherein actuating the diverter valve to sequentially supply the recirculated wash liquid to the supply conduits comprises sequentially advancing the diverter valve from the current supply conduit to the next supply conduit when the current supply conduit reaches a filled condition.

3. The method of claim 1, wherein actuating the diverter valve to retain the wash liquid stored in the supply conduits comprises fluidly uncoupling the diverter valve from all of the supply conduits.

4. The method of claim 1, wherein the recirculating comprises filtering the wash liquid prior to storing the wash liquid in the supply conduits.

5. The method of claim 1, wherein the terminating the recirculation comprises terminating the recirculation of wash liquid when the liquid supply conduits reach a filled condition with wash liquid.

6. The method of claim 1, wherein the predetermined amount of wash liquid comprises an amount of wash liquid approximately equal to a maximum capacity of the spray system.

7. The method of claim 1, further comprising draining a predetermined amount of the wash liquid from the sump prior to the recirculating the wash liquid.

8. The method of claim 1, further comprising recirculating the liquid through the treating chamber to remove soils from any utensils within the treating chamber and to form the wash liquid.

9. The method of claim 1, wherein actuating the diverter valve to retain the wash liquid stored in the supply conduits comprises positioning the diverter such that a pump is fluidly decoupled from all the supply conduits of the spray system.