US 12,247,579 B2
Cooling fan and cooling fan module
Christian Froh, Oldenburg (DE); Bernd Maurer, Bad Zwischenahn (DE); and Thomas Dreesen, Oldenburg (DE)
Assigned to Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Wuerzburg, Wuerzburg (DE)
Filed by Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Wuerzburg, Wuerzburg (DE)
Filed on Jun. 21, 2022, as Appl. No. 17/844,926.
Application 17/844,926 is a continuation of application No. PCT/EP2020/086221, filed on Dec. 15, 2020.
Claims priority of application No. 10 2019 220 232.2 (DE), filed on Dec. 19, 2019.
Prior Publication US 2022/0316496 A1, Oct. 6, 2022
Int. Cl. F04D 29/52 (2006.01); F01P 5/04 (2006.01); F01P 5/06 (2006.01); F04D 19/00 (2006.01); F04D 25/06 (2006.01); F04D 29/16 (2006.01); F04D 29/32 (2006.01); F04D 29/54 (2006.01)
CPC F04D 29/522 (2013.01) [F01P 5/06 (2013.01); F04D 19/002 (2013.01); F04D 25/06 (2013.01); F04D 29/325 (2013.01); F04D 29/326 (2013.01); F04D 29/526 (2013.01); F04D 29/545 (2013.01); F04D 29/547 (2013.01); F01P 2005/046 (2013.01); F04D 29/164 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A cooling fan, comprising:
a fan shroud having a shroud upper side and a shroud underside, and being formed with a fan wheel recess which is surrounded by a shroud ring; and
a fan wheel rotatably arranged in said fan wheel recess for conveying an air flow along a conveying direction from said shroud upper side to said shroud underside;
said fan wheel having a central hub cup, a plurality of blades radially projecting from said hub cup, and an outer ring connecting said blades to one another at a blade tip end thereof;
said outer ring and said shroud ring being disposed to form a circumferential ring gap therebetween;
a rib structure disposed in said ring gap and configured to reduce swirl in a gap flow oriented against the conveying direction;
said shroud ring having a shroud ring section extending axially on the shroud underside beyond said outer ring;
said shroud ring section being oriented parallel or at an angle of inclination and radially inwards relative to the conveying direction; and
a connecting line extending from an outer ring end surface of said outer ring to a shroud ring end surface of said shroud ring section being inclined at an acute angle of between 25° and 35° relative to the conveying direction, said connecting line extending between a radially outermost edge of said outer ring end surface and a radially innermost edge of said shroud ring end surface, and said outer ring end surface being on an axial front face of said outer ring and said shroud ring end surface being on an axial front face of said shroud ring section.