US 11,725,883 B2
Heat sink
Yasuyuki Tochigi, Tokyo (JP); Masahiro Meguro, Tokyo (JP); Hiroshi Sakai, Tokyo (JP); and Kenya Kawabata, Tokyo (JP)
Assigned to Furukawa Electric Co., Ltd., Tokyo (JP)
Filed by Furukawa Electric Co., Ltd., Tokyo (JP)
Filed on Oct. 28, 2022, as Appl. No. 18/50,895.
Application 18/050,895 is a division of application No. 16/935,164, filed on Jul. 21, 2020, granted, now 11,543,189.
Application 16/935,164 is a continuation of application No. PCT/JP2019/003084, filed on Jan. 30, 2019.
Claims priority of application No. 2018-015334 (JP), filed on Jan. 31, 2018.
Prior Publication US 2023/0102800 A1, Mar. 30, 2023
Int. Cl. F28D 15/02 (2006.01)
CPC F28D 15/0275 (2013.01) [F28D 15/025 (2013.01); F28D 15/0241 (2013.01); F28D 15/0266 (2013.01); F28F 2215/08 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A heat sink comprising:
a heat dissipation unit comprising a plurality of heat dissipation fin groups including a plurality of heat dissipation fins, the plurality of heat dissipation fin groups forming a laminated structure; and
a plurality of heat pipes, each of the heat pipes including a first end portion and a second end portion, the first end portions being thermally connected to a heating element and second end portions being inserted into a space provided between the plurality of heat dissipation fin groups forming the laminated structure and thermally connected to the heat dissipation unit, wherein
the plurality of heat pipes comprise predetermined heat pipes and other heat pipes which are not the predetermined heat pipes,
the second end portion of the predetermined heat pipes are upper second end portions which are inserted into a first space provided between the plurality of heat dissipation fin groups, the first space being located at a position in a height direction of the heat dissipation unit which is directly below the highest fin group of the plurality of heat dissipation fin groups,
the second end portions of the other heat pipes are lower second end portions which are inserted into a second space provided between the plurality of heat dissipation fin groups, the second space being located at a position in the height direction of the heat dissipation unit which is lower than the first space, the first end portions of the predetermined heat pipes and the first end portions of the other heat pipes are not alternately disposed, and
the first end portion of the at least one predetermined heat pipe is thermally connected to a region where heat density of the heating element is higher than heat density of the first end portions of the other heat pipes.