Rotating drum filter for a dishwashing machine
First Claim
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1. A dishwashing machine comprising:
- a spray arm,a sump positioned below the spray arm for collecting fluid and soil particles,a housing in fluid communication with the sump and the spray arm, the housing having an inner chamber,a filter enclosing a hollow interior and positioned in the inner chamber and fluidly dividing the inner chamber into a first part that contains filtered soil particles and a second part that excludes filtered soil particles and operable to rotate about a longitudinal axis, the filter having an outer surface,a wash pump including an impeller operably coupled to the filter, the impeller being operable to rotate about the axis, anda flow diverter positioned in the inner chamber, the flow diverter having a tip spaced apart from the outer surface of the filter so as to define a gap,wherein the rotation of the impeller advances fluid through the filter into the hollow interior and during rotation of the filter, an angular velocity of fluid advanced through the gap is increased relative to the angular velocity of the fluid prior to entering the gap.
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Abstract
A dishwashing machine includes a housing in fluid communication with a washing chamber and a filter positioned in the housing that is operable to rotate about a longitudinal axis. A flow diverter is positioned within the inner chamber at a location between the housing and the rotary filter and is spaced apart from the rotary filter so as to create a gap. During rotation of the filter, the angular velocity of fluid advanced through the gap is increased relative to the angular velocity of the fluid prior to entering the gap.
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Citations
22 Claims
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1. A dishwashing machine comprising:
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a spray arm, a sump positioned below the spray arm for collecting fluid and soil particles, a housing in fluid communication with the sump and the spray arm, the housing having an inner chamber, a filter enclosing a hollow interior and positioned in the inner chamber and fluidly dividing the inner chamber into a first part that contains filtered soil particles and a second part that excludes filtered soil particles and operable to rotate about a longitudinal axis, the filter having an outer surface, a wash pump including an impeller operably coupled to the filter, the impeller being operable to rotate about the axis, and a flow diverter positioned in the inner chamber, the flow diverter having a tip spaced apart from the outer surface of the filter so as to define a gap, wherein the rotation of the impeller advances fluid through the filter into the hollow interior and during rotation of the filter, an angular velocity of fluid advanced through the gap is increased relative to the angular velocity of the fluid prior to entering the gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A dishwashing machine comprising:
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a washing chamber having a bottom surface, a sump positioned in the bottom surface of the washing chamber, a housing fluidly coupled to the sump, the housing having an inner chamber defined therein, a filter positioned in the inner chamber, the filter being operable to rotate about an imaginary axis, a filter sheet extending from a first end of the filter to a second end of the filter, the filter sheet having an inner surface and an outer surface, a first flow diverter positioned in the inner chamber at a location between the housing and at least one of the inner surface and the outer surface of the filter, and a second flow diverter positioned opposite the first flow diverter at a location adjacent the other of the inner surface and the outer surface, the second flow diverter is spaced apart from the first flow diverter so as to create a gap, wherein an angular velocity of fluid advanced through the gap is increased relative to fluid bypassing the gap during rotation of the filter. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A recirculation pump assembly for a dishwasher, comprising:
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a housing having an inner chamber defined therein and having an inlet port configured to be fluidly coupled to a sump of a dishwasher and an outlet port configured to be fluidly coupled to a spray arm of the dishwasher, an impeller positioned at a first end of the housing between the inlet port and the outlet port, the impeller being operable to rotate about an axis such that fluid is advanced from the inlet port to the outlet port, a rotary filter coupled at a first end to the impeller and at a second end to a bearing, and a flow diverter positioned within the inner chamber at a location between the housing and the rotary filter, the flow diverter being spaced apart from the rotary filter so as to create a gap, wherein an angular velocity of fluid advanced through the gap is increased relative to fluid bypassing the gap during rotation of the rotary filter. - View Dependent Claims (22)
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Specification