# US 12,006,607 B2 · Washing machine ventilation structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,607 B2 - Document ID: US12006607B2 - Status: Granted - Kind: B2 - Application number: 17/531,756 - Filed: 2021-11-21 - Published: 2023-05-25 - Granted: 2024-06-11 - Earliest claimed: 2021-11-21 - Assignees: Haier US Appliance Solutions, Inc. - Applicants: Haier US Appliance Solutions, Inc. - Inventors: Fikreadam Abebe Damtew; Aaron Lee Welch; S. Neil Malone; James Quentin Pollett; Rushikesh Nandkumar Salvi - Web page: https://patentgrep.com/patent/US12006607B2 ## CPC - D06F 23/02: and rotating or oscillating about a horizontal axis - D06F 37/267: {Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups (D06F37/206 takes precedence)} - D06F 39/06: Arrangements for preventing or destroying scum - D06F 39/12: Casings; Tubs - D06F 39/14: Doors or covers; Securing means therefor - D06F 23/04: and rotating or oscillating about a vertical axis - D06F 33/63: of air flow, e.g. blowing air during the washing process to prevent entanglement of the laundry - D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES ## Abstract A washing machine appliance including a ventilation structure. A vent line is at a wash tub. A vent filter is provided to the vent line that allows air to flow from the wash tub, and through the vent line, the vent filter redirecting cleaning fluids impinging on the vent filter back toward the wash tub. The vent filter may include a plurality of louvers. The louvers may be located adjacent to one another so as to form a plurality of openings for the flow of air from the wash tub. ## Claims ### Claim 1 A front load washing machine appliance, the washing machine appliance comprising: a cabinet; a wash tub positioned within the cabinet; a wash basket rotatably mounted within the wash tub and accessible through an opening in the cabinet; a door mounted to a front of the cabinet and movable between an open position and a closed position for selectively controlling access to the wash basket; a vent line extending from the wash tub, the vent line providing for a flow of air along a flow direction from the wash tub, the vent line having a vent inlet positioned at the wash tub; and a vent filter disposed at the vent inlet to the vent line, the vent filter comprising a plurality of louvers located adjacent to each other and spaced apart from each other so as to form a plurality of openings for the flow of air from the wash tub, each louver comprising an upstream face and a downstream face along the flow direction; a bottom portion and a top portion along a vertical direction; and a top lip extending from the top portion, the top lip having an upstream surface forming an obtuse or right angle with the upstream face, wherein the upstream face is positioned so that fluid ejected from the wash basket during rotation of the wash basket impinges upon the upstream face to deter fluid from travelling through the vent line. ### Claim 2 (depends on 1) The front load washing machine appliance of claim 1, wherein the upstream surface of the top lip extends outwardly and parallel to a horizontal direction. ### Claim 3 (depends on 1) The front load washing machine appliance of claim 1, wherein the upstream surface of the top lip extends downwardly from the top portion and parallel to a vertical direction. ### Claim 4 (depends on 1) The front load washing machine appliance of claim 1, wherein the vent filter further comprises a vent filter casing having a groove. ### Claim 5 (depends on 1) The front load washing machine appliance of claim 1, wherein the upstream face is planar. ### Claim 6 (depends on 1) The front load washing machine appliance of claim 1, wherein the upstream face is curved. ### Claim 7 (depends on 1) The front load washing machine appliance of claim 1, wherein each louver further comprises a bottom lip extending from the bottom portion, the bottom lip having a bottom upstream surface forming a reflex angle with the upstream face. ### Claim 8 (depends on 7) The front load washing machine appliance of claim 7, wherein the bottom upstream surface of the bottom lip extends along a direction that is parallel to a horizontal direction. ### Claim 9 (depends on 1) The front load washing machine appliance of claim 1, wherein the wash tub includes an outer circumferential surface, wherein the vent inlet of the vent line is positioned coincident with, or immediately adjacent to, a vertical tangent to the outer circumferential surface of the wash tub. ### Claim 10 A front load washing machine appliance, the washing machine appliance comprising: a cabinet; a wash tub positioned within the cabinet; a wash basket rotatably mounted within the wash tub and accessible through an opening in the cabinet; a door mounted to a front of the cabinet and movable between an open position and a closed position for selectively controlling access to the wash basket; and a vent line extending from the wash tub, the vent line providing for a flow of air along a flow direction from the wash tub, the vent line having a vent inlet positioned at the wash tub; a vent filter disposed at the vent inlet to the vent line, the vent filter comprising a plurality of louvers located adjacent to each other and spaced apart from each other so as to form a plurality of openings for the flow of air from the wash tub; and wherein each louver has an upstream face; wherein each louver has a downstream face; wherein each louver has a bottom portion and a top portion along a vertical direction; wherein along the top portion each louver further comprises a top lip forming a non-zero angle with respect to the upstream face; and wherein the upstream face is positioned so that fluid ejected from the wash basket during rotation of the wash basket impinges upon the upstream face to block the fluid from travelling through the vent line. ### Claim 11 (depends on 10) The front load washing machine appliance of claim 10, wherein the top lip extends along a direction that is parallel to a horizontal direction. ### Claim 12 (depends on 10) The front load washing machine appliance of claim 10, wherein the top lip extends along a direction that is parallel to a vertical direction. ### Claim 13 (depends on 10) The front load washing machine appliance of claim 10, wherein the vent filter further comprises a vent filter casing having a groove. ### Claim 14 (depends on 10) The front load washing machine appliance of claim 10, wherein the upstream face is planar. ### Claim 15 (depends on 10) The front load washing machine appliance of claim 10, wherein the upstream face is curved. ### Claim 16 (depends on 10) The front load washing machine appliance of claim 10, wherein along the bottom portion each louver further comprises a bottom lip bent at a non-zero angle from the upstream face. ### Claim 17 (depends on 16) The front load washing machine appliance of claim 16, wherein the bottom lip extends along a direction that is parallel to a horizontal direction. ### Claim 18 (depends on 10) The front load washing machine appliance of claim 10, wherein the wash tub includes an outer circumferential surface, wherein the vent inlet of the vent line is positioned coincident with, or immediately adjacent to, a vertical tangent to the outer circumferential surface of the wash tub. ### Claim 19 (depends on 1) The front load washing machine appliance of claim 1, wherein the vent filter further comprises a vent filter casing to which the plurality of louvers are non-rotatably attached. ### Claim 20 (depends on 10) The front load washing machine appliance of claim 10, wherein the vent filter further comprises a vent filter casing to which the plurality of louvers are attached so as to fix the position of each of the plurality of louvers relative to the vent filter casing.