US 12,262,862 B2
Cleaning apparatus with flow deflection element with built-in wall
Dominik Scholl, Winnenden (DE); and Florian Ebert, Winnenden (DE)
Assigned to ALFRED KÄRCHER SE & CO. KG, Winnenden (DE)
Filed by Alfred Kärcher SE & Co. KG, Winnenden (DE)
Filed on Apr. 26, 2024, as Appl. No. 18/647,371.
Application 18/647,371 is a continuation of application No. PCT/EP2022/078608, filed on Oct. 14, 2022.
Claims priority of application No. 102021128206.3 (DE), filed on Oct. 28, 2021.
Prior Publication US 2024/0292988 A1, Sep. 5, 2024
Int. Cl. A47L 9/24 (2006.01); A47L 9/00 (2006.01)
CPC A47L 9/248 (2013.01) [A47L 9/0081 (2013.01)] 45 Claims
OG exemplary drawing
 
1. A cleaning apparatus, comprising at least one noise source and an air guidance device having at least one flow deflection element, wherein the at least one flow deflection element has a first duct arm and a second duct arm, wherein the second duct arm is oriented transversely to the first duct arm, and wherein the first duct arm and the second duct arm have a common edge at an external corner region, wherein arranged in an interior of the at least one flow deflection element is a built-in wall which covers the edge in the interior, wherein the built-in wall faces a through-flow region in the interior, and wherein the built-in wall takes a form such that it guides flow and is sound-permeable,
wherein a region of transition from the first duct arm to the second duct arm has, at an internal corner region which lies opposite the external corner region, a wall that is curved relative to the interior of the at least one flow detection element, and
wherein a circle of curvature for the curved wall has an internal radius that is greater than half of a hydraulic diameter of a first opening of the first duct arm.