US 12,218,027 B2
Electrical device and electronic control device with housings having fin arrangement and fan for air flow
Minami Teranishi, Tokyo (JP); Hideyuki Sakamoto, Hitachinaka (JP); and Shinya Kawakita, Tokyo (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/636,124
Filed by HITACHI ASTEMO, LTD., Hitachinaka (JP)
PCT Filed Apr. 20, 2020, PCT No. PCT/JP2020/017114
§ 371(c)(1), (2) Date Feb. 17, 2022,
PCT Pub. No. WO2021/038954, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-158389 (JP), filed on Aug. 30, 2019.
Prior Publication US 2022/0293487 A1, Sep. 15, 2022
Int. Cl. H05K 7/20 (2006.01); H01L 23/367 (2006.01); H01L 23/467 (2006.01)
CPC H01L 23/3677 (2013.01) [H01L 23/467 (2013.01); H05K 7/20136 (2013.01); H05K 7/20409 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An electrical device, comprising:
a first housing which has therein a first circuit board on which at least a first electronic component is mounted;
a second housing which has therein a second circuit board on which at least a second electronic component is mounted; and
at least one or more fans which send air passing between the first housing and the second housing,
wherein the first housing has a plurality of fins facing the second housing,
the second housing has a plurality of fins facing the first housing, and
in at least one of cross sections of the first circuit board in a thickness direction, the electrical device has a structure having a region in which the fin of the first housing is longer than the fin of the second housing and a region in which the fin of the first housing is shorter than the fin of the second housing.