# US 2017/0280963 A1 · Dishwasher for treating dishes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0280963 A1 - Document ID: US20170280963A1 - Status: Published application - Kind: A1 - Application number: 15/621,609 - Filed: 2017-06-13 - Published: 2017-10-05 - Earliest claimed: 2013-07-01 - Assignees: Whirlpool Corporation - Applicants: Whirlpool Corporation - Inventors: Alvaro Vallejo Noriega; Rodney M. Welch - Web page: https://patentgrep.com/patent/US20170280963A1 ## CPC - A47L 15/4206: {Tubular filters} - A47L 15/4225: {Arrangements or adaption of recirculation or discharge pumps} - A47L 15/4285: {Water-heater arrangements (steam generating arrangements A47L15/4234)} - A47L 15/46: Devices for the automatic control of the different phases of cleaning {; Controlling devices (A47L15/449 takes precedence)} - A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08) ## Abstract A dishwasher for treating dishes according to at least one cycle of operation including a tub at least partially defining a treating chamber for receiving the dishes, at least one sprayer, a liquid recirculation system, a liquid filtering system including a housing defining and a filter located within the interior and a heater configured to heat liquid that has passed through the inlet opening of the housing. ## Claims ### Claim 1 A pump and filter assembly, comprising: an impeller, a housing defining an interior and exterior and where the housing includes an end plate defining an end of the housing and the end plate further defining a channel that extends inwardly towards the interior, and an inlet opening provided within the end plate; and a filter having an upstream surface and a downstream surface, the filter located within the interior such that liquid being pumped through the pump and filter assembly passes through the filter from the upstream surface to the downstream surface to effect a filtering of the liquid; and a heater having a heating element and where at least a portion of the heating element is received exteriorly of the housing and within the channel such that the heating element is located on the end of the housing adjacent the inlet opening of the housing and the heater encircles at least a portion of the inlet opening of the housing and where the heater is configured to heat liquid that has passed through the inlet opening of the housing. ### Claim 2 (depends on 1) The pump and filter assembly of claim 1 wherein the filter is a rotating filter. ### Claim 3 (depends on 2) The pump and filter assembly of claim 2 wherein the impeller is operably coupled to the filter to effect rotation of the filter. ### Claim 4 (depends on 1) The pump and filter assembly of claim 1 wherein the filter is a hollow filter having a filter exterior and a filter interior and the filter defines the upstream surface and the filter interior defines the downstream surface. ### Claim 5 (depends on 1) The pump and filter assembly of claim 1 wherein the heating element of the heater is a tubular heating element. ### Claim 6 (depends on 1) The pump and filter assembly of claim 1 wherein the channel further comprises convolutions extending from a portion of the end plate into the housing. ### Claim 7 (depends on 6) The pump and filter assembly of claim 6 wherein the convolutions comprise peaks and valleys. ### Claim 8 (depends on 7) The pump and filter assembly of claim 7 wherein the peaks define at least a portion of a heater seat on which at least a portion of the heating element rests. ### Claim 9 (depends on 1) The pump and filter assembly of claim 1 wherein the channel conforms to a shape of the heating element. ### Claim 10 (depends on 1) The pump and filter assembly of claim 1 wherein the end plate is operably coupled to the housing to locate the heater adjacent the inlet opening. ### Claim 11 (depends on 1) The pump and filter assembly of claim 1 wherein the end plate comprises a projection extending toward the filter and the projection defines the channel. ### Claim 12 (depends on 1) The pump and filter assembly of claim 1 wherein the heater comprises at least one of a rectilinear and a trapezoidal cross section. ### Claim 13 (depends on 1) The pump and filter assembly of claim 1 wherein the heater comprises multiple concentric coils. ### Claim 14 (depends on 1) The pump and filter assembly of claim 1 wherein the heater encircles the inlet opening. ### Claim 15 (depends on 1) The pump and filter assembly of claim 1 wherein the heater is upstream of the filter. ### Claim 16 A pump and filter assembly, comprising: a housing defining an interior and having an end plate that defines an end of the housing, the end plate also defines a channel with convolutions extending from a portion of the end plate into the housing, an inlet opening is provided at the end of the housing; a filter having an upstream surface and a downstream surface and located within the interior such that liquid passes through the filter from the upstream surface to the downstream surface to effect a filtering of the liquid; and a heater having a heating element located on the end of the housing adjacent the inlet opening of the housing and configured to heat liquid that has passed through the inlet opening of the housing and where at least a portion of a heating element is received within the channel. ### Claim 17 (depends on 16) The pump and filter assembly of claim 16 wherein the heater encircles at least a portion of the inlet opening. ### Claim 18 (depends on 16) The pump and filter assembly of claim 16 wherein the filter is a rotating filter. ### Claim 19 (depends on 18) The pump and filter assembly of claim 18, further comprising an impeller located within the interior and wherein the impeller is operably coupled to the filter to effect rotation of the filter. ### Claim 20 (depends on 19) The pump and filter assembly of claim 19 wherein the filter is a hollow filter having a filter exterior and a filter interior and the filter exterior defines the upstream surface and the filter interior defines the downstream surface.