US 12,215,936 B2
Heat sink for an electronic board of a motor vehicle motor-driven fan unit
Ismaël Franco, Le Mesnil Saint-Denis (FR); and Zhenxia Ma, Le Mesnil Saint-Denis (FR)
Assigned to VALEO SYSTEMES THERMIQUES, Le Mesnil-Saint-Denis (FR)
Appl. No. 17/430,149
Filed by Valeo Systemes Thermiques, Le Mesnil Saint-Denis (FR)
PCT Filed Feb. 11, 2020, PCT No. PCT/FR2020/050243
§ 371(c)(1), (2) Date Aug. 11, 2021,
PCT Pub. No. WO2020/165536, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 1901364 (FR), filed on Feb. 12, 2019.
Prior Publication US 2022/0099386 A1, Mar. 31, 2022
Int. Cl. F28F 3/04 (2006.01); F04D 25/06 (2006.01); F04D 29/58 (2006.01); H05K 7/20 (2006.01)
CPC F28F 3/04 (2013.01) [F04D 25/06 (2013.01); F04D 29/5813 (2013.01); H05K 7/2039 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A heat sink for an electronic board of a motor-driven fan unit of a motor vehicle, comprising
an exchange surface configured for exchange of heat with an air flow set in motion by the motor-driven fan unit, said exchange surface comprising:
a planar portion configured such that, in a position installed in the motor-driven fan unit, the air flow set in motion by the motor-driven fan unit flows substantially parallel to said planar portion; and
a set of blind cavities flush with said planar portion,
wherein each blind cavity comprises a part in a form of a truncated pyramid on a polygonal base and/or a part of constant cross section, and
wherein the polygonal base is a hexagonal base.