Heat sink for an electronic board of a motor vehicle motor-driven fan unit

Patent metadata

Field	Value
Publication number	US-12215936-B2
Application number	US-202017430149-A
Country	US
Kind code	B2
Filing date	Feb 11, 2020
Priority date	Feb 12, 2019
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

The invention relates to a heat sink for an electronic board of a motor vehicle motor-driven fan unit, comprising a surface (2) intended for exchanging heat with an air flow set in motion by the motor-driven fan unit, referred to as exchange surface (2), said exchange surface (2) comprising a planar portion (3) arranged so 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 (3), the exchange surface (2) also comprising a set of blind recesses (4) flush with said planar portion (3).

First claim

The invention claimed is:

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.

2. The heat sink as claimed in claim 1 , wherein the set of blind cavities is arranged in a quadrilateral, wherein the quadrilateral is rectangular, grid and/or in an offset configuration and/or in a honeycomb configuration.

3. The heat sink as claimed in claim 1 , wherein the blind cavities have the same orientation.

4. The heat sink as claimed in claim 1 , wherein a ratio between a depth of each blind cavity and a length of one side of the polygonal base is comprised between 0.05 and 0.5.

5. The heat sink as claimed in claim 1 , wherein the exchange surface is made from a material of aluminum alloy or of plastic.

Assignees

• Valeo Systemes Thermiques

Inventors

• Franco Ismaël
• Ma Zhenxia

Classifications

• H05K7/2039

  characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00) · CPC title

• F04D29/5813

  Cooling the control unit · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• H05K7/20509

  Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures · CPC title

• H05K7/20918

  the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels · CPC title