| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of an air gap in a heat radiating path from a heat sink, and to provide a heat sink and a heat radiator where the heat radiating efficiency is improved. SOLUTION: A heat sink 26 of a heat radiator 1 is provided with an electric power element 21 and attached to an inverter case 11 containing cooling water 15 and radiates heat of the electric power element 21 to the cooling water 15 while carrying an electric power element. In the heat sink 26, a projection part 26a is formed on the rear side of a surface on which the electric power element 21 is mounted, a fin 26b is formed on the tip of the projection part 26a. When the heat sink 26 is attached to the inverter case 11, the fin 26b passes through a through hole provided on the inverter case 11 to be brought into contact with the cooling water 15. Consequently, the heat of the electric power element 21 is directly radiated to the cooling water 15 through the heat sink 26. COPYRIGHT: (C)2004,JPO&NCIPI |
