US 11,812,581 B2
Cooling structure and electrical apparatus
Takashi Takeuchi, Kariya (JP); Toshiaki Ito, Kariya (JP); Yoshiaki Oshita, Kariya (JP); Hidehiko Hidaka, Kyoto (JP); and Shigeyuki Moriya, Kyoto (JP)
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP); and NIDEC CORPORATION, Kyoto (JP)
Appl. No. 17/788,962
Filed by KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP); and NIDEC CORPORATION, Kyoto (JP)
PCT Filed Dec. 21, 2020, PCT No. PCT/JP2020/047713
§ 371(c)(1), (2) Date Jun. 24, 2022,
PCT Pub. No. WO2021/132171, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-236324 (JP), filed on Dec. 26, 2019.
Prior Publication US 2023/0040072 A1, Feb. 9, 2023
Int. Cl. H05K 7/20 (2006.01)
CPC H05K 7/20154 (2013.01) [H05K 7/20172 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A cooling structure comprising:
a main body that includes: a base in which a heat dissipation surface is formed; a plurality of heat dissipation fins each protruding from the heat dissipation surface and extending in a height direction from a bottom end located on a side of the heat dissipation surface toward a top end; and a protrusion formed of an electrically conductive member and protruding in the height direction from the heat dissipation surface, and releases, through the heat dissipation surface and the plurality of heat dissipation fins, heat received from a heat source;
a lid member including an air inlet, disposed to cover the protrusion and the plurality of heat dissipation fins from a side of the top end, and forming a flow path, together with the heat dissipation surface and the plurality of heat dissipation fins; and
a fan mechanism that is driven to rotate and thereby generate an airflow with its upstream side at the air inlet and its downstream side at the flow path, wherein
the lid member includes a portion disposed to cover at least the protrusion, and the portion has electrical conductivity,
the fan mechanism includes a vane portion, a driving portion that rotates the vane portion, and a conductive wire for supplying electric power to the driving portion,
the protrusion includes a first through hole,
the base includes a second through hole communicating with the first through hole, and
the conductive wire includes a first portion connected to the driving portion and disposed between the lid member and the main body, and a second portion continuing from the first portion and inserted in the first through hole and the second through hole.