| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric power conversion system which reduces the number of components and improves the assembly workability while securing seal performance.SOLUTION: An electric power conversion system 1 includes: a semiconductor unit 2 including a semiconductor module 21 incorporating a switching element and a cooler 22 which cools the semiconductor module 21; and a case 6 which houses the semiconductor unit 2. The cooler 22 includes: a heat exchange part 221; a refrigerant introduction pipe 222; and a refrigerant discharge pipe 223. The refrigerant introduction pipe 222 and the refrigerant discharge pipe 223 are disposed inserted into through holes 623 which are formed in the case 6 penetrating therethrough. Each connector 3 includes: a cylindrical part 31; and a second sealing member 33 which seals a space between an outer peripheral surface of the refrigerant introduction pipe 222 or an outer peripheral surface of the refrigerant discharge pipe 223 and an inner peripheral surface of the cylindrical part 31. A first seal member 4 integrally has a first seal surface 441, a second seal surface 442, and a third seal surface 443. |
