| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric supercharger which enables simplification of a structure for cooling multiple bearings having different tendencies of temperature rise.SOLUTION: An electric supercharger 101 includes: an electric motor 30; a compressor wheel 21 which is rotationally driven by the electric motor 30 through a shaft 22; a housing 10 which houses the electric motor 30; and a first bearing 23 and a second bearing 24 which are disposed in the housing 10 and rotatably support the shaft 22. The first bearing 23 is disposed between the compressor wheel 21 and the second bearing 24. The housing 10 includes multiple heat radiation fins 40 which protrude to the outer side at the exterior side of a side wall 13a extending along an axial direction of the shaft 22. The heat radiation fins 40 include: first fins 41 positioned at the first bearing 23 side; and second fins 42 positioned at the second bearing 24 side. The first fins 41 protrude from the side wall 13a further than the second fins 42. |
