Abstract: A spray arm assembly for a dishwashing appliance is provided. The assembly can provide for sprays of fluid at different angles against the articles to be cleaned. For example, the spray arm assembly can have at least two spray bodies rotatable in opposite directions. Because the fluid is sprayed from the spray bodies at different angles and from different directions, more efficient and effective cleaning can be accomplished. In certain embodiments of the invention, one or both spray bodies may be operated at any one time and/or at different flow rates.

Abstract: A method for operating a dishwasher appliance is provided. The method includes interrupting a flow of wash fluid from a filtered volume of a sump to a spray assembly for a period of time during a wash cycle and resuming the flow of wash fluid from the filtered volume of the sump to the spray assembly after the period of time has elapsed during the wash cycle. The method can assist with limiting clogging of a filter media positioned between the filtered volume of the sump and an unfiltered position of the sump.

Abstract: Dishwasher appliances are provided. A dishwasher appliance includes a tub that defines a wash chamber for receipt of articles for washing, and a rack assembly arranged within the tub. The dishwasher appliance further includes a fluid ejection assembly, the fluid ejection assembly including an ejection head disposed within the wash chamber, the ejection head operable to eject fluid into the wash chamber. In one embodiment, the dishwasher appliance further includes a passive deflection assembly, the passive deflection assembly including a deflection unit disposed within the wash chamber for deflecting fluid from the ejection head towards the rack assembly. In another embodiment, the dishwasher appliance further includes a deflection assembly, the deflection assembly including a deflection unit disposed within the wash chamber for deflecting fluid from the ejection head towards the rack assembly, the deflection assembly further including a magnet operable to move the deflection unit.

Abstract: The present subject matter provides a dishwasher appliance that measures the amount of ozone in a wash chamber of the appliance. The appliance is also configured for adjusting the amount of ozone in the wash chamber based upon such measurements. The appliance may adjust the amount of ozone by, e.g., adjusting the flow rate of wash fluid to the wash chamber, adjusting the flow rate of air in the wash chamber, and/or adjusting the temperature of wash chamber. Related methods are also provided.

Abstract: The present subject matter provides a method for operating a dishwasher appliance. The method includes finely filtering wash fluid with a fine filtration medium via cross-flow filtration and coarsely filtering wash fluid with a coarse filtration medium via dead-end filtration. The finely filtered wash fluid is directed to a spray assembly of the dishwasher appliance. A related dishwasher appliance is also provided.

Abstract: A spray device assembly for a dishwasher appliance is provided including an outer tube and an inner tube. The outer tube extends along an axial direction and defines an outer tube orifice extending along a length of the outer tube. The inner tube also extends along the axial direction and is rotatably positioned at least partially within an opening of the outer tube. Moreover, the inner tube defines an inner tube orifice extending along a length of the inner tube. The outer tube orifice and inner tube orifice together define a nozzle where the outer tube orifice and the inner tube orifice overlap, the nozzle configured to move along the outer tube orifice as the inner tube and the outer tube are rotated relative to one another.

Abstract: The present subject matter provides a dishwasher appliance that measures the amount of ozone in a wash chamber of the appliance. The appliance is also configured for adjusting the amount of ozone in the wash chamber based upon such measurements. The appliance may adjust the amount of ozone by, e.g., adjusting the flow rate of wash fluid to the wash chamber, adjusting the flow rate of air in the wash chamber, and/or adjusting the temperature of wash chamber. Related methods are also provided.

Abstract: A method for operating a dishwasher appliance is provided. The method includes operating a first pump and a second pump of the dishwasher appliance during a wash cycle of the dishwasher appliance, working the second pump of the dishwasher appliance during a soil collection cycle of the dishwasher appliance, and running the first pump of the dishwasher appliance during a drain cycle of the dishwasher appliance. The first pump of the dishwasher appliance is deactivated during the step of working, and the second pump of the dishwasher appliance is deactivated during the step of running. A related dishwasher appliance is also provided.

Abstract: An appliance for washing objects is disclosed that effectively and energy-efficiently filters oil-based residue from a fluid such as washing fluid that drains from a basin in the appliance. In one illustrative embodiment, an appliance includes a novel filter assembly for filtering oil-based residue out of the washing fluid. The filter assembly includes a filter layer composed of a material that is both oleophilic and hydrophobic. The filter assembly forms part of a fluid distribution system that has different configurations. A first configuration allows for recirculating filtered wash fluid from an outlet of the filter assembly back into the basin of the appliance. A second configuration allows for draining both the washing fluid from the outlet of the filter assembly and the oil-based residue from a bypass zone of the filter assembly to an appliance outlet.

Abstract: A method for operating a dishwasher appliance is provided. The method includes interrupting a flow of wash fluid from a filtered volume of a sump to a spray assembly for a period of time during a wash cycle and resuming the flow of wash fluid from the filtered volume of the sump to the spray assembly after the period of time has elapsed during the wash cycle. The method can assist with limiting clogging of a filter media positioned between the filtered volume of the sump and an unfiltered position of the sump.

Abstract: The present subject matter provides a dishwasher appliance that measures the amount of ozone in a wash chamber of the appliance. The appliance is also configured for adjusting the amount of ozone in the wash chamber based upon such measurements. The appliance may adjust the amount of ozone by, e.g., adjusting the flow rate of wash fluid to the wash chamber, adjusting the flow rate of air in the wash chamber, and/or adjusting the temperature of wash chamber. Related methods are also provided.

Abstract: A dishwasher appliance and a method for operating an appliance are provided. The method includes drawing a flow of unfiltered liquid into an unfiltered volume of a filtering assembly of the appliance and circulating the unfiltered liquid in a circular pattern within the unfiltered volume such that the unfiltered liquid circulates in the circular pattern across a filter medium of the filter assembly. The circular pattern of the unfiltered water can assist with limiting or preventing clogging of the filter medium.

Abstract: A dishwasher appliance and a method for filtering liquid in an appliance are provided. The method includes directing a flow of unfiltered liquid over a filter medium of the appliance in a first direction and urging a flow of filtered liquid adjacent the filter medium of the appliance in a second direction. The first direction is substantially perpendicular to the second direction. Such cross flow can assist with limiting clogging of the filter medium.

Abstract: A filtering system is provided for a dishwashing appliance that can remove fine particles from the wash and rinse fluids. The system uses a filter that can be rotated between filter media that are equipped for removal of different particulate sizes depending upon e.g., the cycle or stage of the cleaning process and/or anticipated particle size. The filter cartridge is positioned upstream from the pump inlet. In certain embodiments, the filter cartridge can be removable for servicing. In certain embodiments, all fluid received from the wash chamber can be passed through the fine filter so as to improve the removal of smaller particles from the wash or rinse fluids.

Abstract: A spray arm assembly for a dishwasher system is disclosed. The spray arm assembly includes a spray arm which has an internal chamber, a liquid inlet in flow communication with the internal chamber to supply the internal chamber with liquid from a source of liquid, an outlet passageway in flow communication with the internal chamber for discharging liquid from the internal chamber, an air inlet in flow communication with the outlet passageway, and a region adjacent the air inlet and defining part of the outlet passageway. The region is configured to create a venturi effect at the air inlet when the liquid passes through the region so that air is drawn into the outlet passageway from the air inlet and a mixture of air and liquid is discharged from the outlet passageway. A dishwasher system incorporating such a spray arm assembly is also disclosed.

Abstract: A dishwasher includes a rotatable spray arm assembly disposed to discharge water supplied by a pump, with the spray arm assembly having arms that extend radially from a hub. A plurality of spray nozzles are provided along each of the arms to discharge the water at an angular orientation such that a rotational torque is induced to rotate the arms and hub. The spray nozzles are variably positionable on the arms as a function of the degree of centrifugal force on the spray nozzles from the induced rotation of the arms such that angular orientation of the spray nozzles changes as a function of the rotational speed of the arms.

Abstract: A filtering system for a dishwashing appliance that can remove fine particles from the wash and rinse fluids is provided. A filter cartridge is provided with different filter media for the removal of different particulate sizes depending upon e.g., the cycle or stage of the cleaning process and/or anticipated particle size. The filter cartridge is positioned upstream from the pump inlet. A mechanism for diverting flow between filter media is provided. In certain embodiments, the filter cartridge can be removable for servicing.

Abstract: A filtering system for a dishwashing appliance is provided that can remove fine particles from the wash and rinse fluids. The system includes a filter cartridge that can be rotated between filter media equipped for removal of different particulate sizes depending upon e.g., the cycle or stage of the cleaning process and/or anticipated particle size. The filter cartridge is positioned upstream from the pump inlet. In certain embodiments, the filter cartridge can be removable for servicing.

Abstract: A sump assembly for a dishwasher appliance is provided. The sump assembly includes a housing that defines a chamber. The sump assembly also includes a filter and an impeller mounted within the chamber. The impeller can hinder object accumulation within the filter or improve performance of the filter or both.

Abstract: A reverse osmosis element is provided. The reverse osmosis element includes a plurality of permeate tubes arranged to form a core frame. The reverse osmosis element further includes a plurality of leaves wound over the core frame. Each leaf of the plurality of leaves is coupled to one permeate tube of the plurality of permeate tubes. A retentate channel is defined by the plurality of permeate tubes of the core frame, and sealed by the plurality of leaves wound over the core frame. The reverse osmosis element includes first and a second end caps coupled to the plurality of permeate tubes. At least one of the first and the second end caps includes a retentate discharge port, and at least one of the first and second end caps includes one or more permeate discharge ports.