US 12,457,711 B2
Apparatus for transferring heat from a heat source to air
Dzmitry Kushner, Kista (SE); Christoffer Jarpner, Kista (SE); Vadim Tsoi, Kista (SE); Fredrik Ohlsson, Kista (SE); Ying Dong, Xi'an (CN); and Marcus Lundh, Kista (SE)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Dec. 13, 2023, as Appl. No. 18/538,908.
Claims priority of application No. 22213352 (EP), filed on Dec. 14, 2022.
Prior Publication US 2024/0206126 A1, Jun. 20, 2024
Int. Cl. H05K 7/20 (2006.01)
CPC H05K 7/2039 (2013.01) [H05K 7/20327 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An apparatus for transferring heat from a heat source to air when the apparatus is connected to the heat source,
a heat sink (112) comprising a plurality of fins connected or connectable to a heat sink base; and
the heat sink base configured to be thermally coupled to the heat source, the heat sink base having a first longitudinal extension configured to extend in a vertical direction when the apparatus is installed,
wherein a fin of the plurality of fins is configured as follows:
the fin comprises a conduit arrangement comprising one or more conduits configured to enclose a heat-carrying fluid,
the fin comprises a boiling region and a condensation region through which the heat-carrying fluid is conveyed,
the boiling region of the fin is positioned between the heat sink base and the condensation region of the fin,
the fin comprises a bottom portion and a top portion,
the fin has a second longitudinal extension extending from the bottom portion to the top portion,
the second longitudinal extension of the fin extends in the direction of the first longitudinal extension of the heat sink base,
in the boiling region, the conduit arrangement comprises a vapour guiding path,
the vapour guiding path has a third longitudinal extension extending in the direction of the second longitudinal extension of the fin,
in the boiling region, the conduit arrangement comprises one or more boiling chambers in which at least a portion of the heat-carrying fluid evaporates,
wherein each boiling chamber of the one or more boiling chambers has an outer boundary,
wherein the respective boiling chamber is located within a corresponding chamber region defined by an imaginary quadrilateral having a first side, a second side, a third side, a fourth side, a first vertex, a second vertex, a third vertex, and a fourth vertex,
wherein the first vertex and the second vertex are located on the vapour guiding path,
wherein the third vertex and the fourth vertex are displaced from the vapour guiding path,
wherein the first vertex is located between the top portion of the fin and each one of the second, third, and fourth vertices,
wherein the third vertex is located between the top portion of the fin and the fourth vertex,
wherein the second vertex is located between the top portion of the fin and the fourth vertex,
wherein the first side of the imaginary quadrilateral extending from the first vertex to the third vertex has one or more first tangent points with the outer boundary of the respective boiling chamber,
wherein the third side of the imaginary quadrilateral extending from the second vertex to the fourth vertex has one or more second tangent points with the outer boundary of the respective boiling chamber, and
wherein the respective boiling chamber is connected to the vapour guiding path via one or more orifices.