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Filter with artificial boundary for a dishwashing machine

  • US 10,178,939 B2
  • Filed: 08/31/2017
  • Issued: 01/15/2019
  • Est. Priority Date: 06/20/2011
  • Status: Active Grant
First Claim
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1. A liquid filtering system for a dishwasher, the liquid filtering system comprising:

  • a housing defining an enclosed filter chamber and configured to be fluidly coupled to a recirculation flow path of the dishwasher;

    a filter located within the housing and having a first end axially spaced from a second end and defining an enclosed hollow interior there between, the filter having a first surface and a second surface, the filter being positioned within the recirculation flow path to filter soils from liquid flowing through the recirculation flow path as the liquid passes through the filter from the first surface to the second surface and where the filter fluidly divides the filter chamber into a first part that contains filtered soil particles and a second part that excludes filtered soil particles; and

    a flow diverter spaced apart from one of the first surface or the second surface to define a gap through which at least some of the liquid passes as the liquid flows through the recirculation flow path and where the flow diverter is shaped such that it includes multiple segmented portions extending along at least a portion of a length of the filter;

    wherein during recirculation the filter chamber is configured to be filled with liquid and at least one of the filter or the flow diverter are configured to rotate within the housing and rotation of the at least one of the filter or the flow diverter is configured to create a rotational flow of unfiltered liquid within the filter chamber about the first surface to create an increase in angular velocity of the liquid in an increased shear force zone between the flow diverter and the first surface of the filter such that liquid passing between the flow diverter and the filter applies a greater shear force on the at least one of the first surface or second surface than liquid in an absence of the flow diverter.

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