| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology that connects refrigerant pipes of coolers with each other at low costs in an electric power conversion system including two pairs of power converters and coolers for cooling the power converters.SOLUTION: An electric power conversion system 2 includes: a first housing 3 storing a lamination cooling unit 20; and a second housing 4 which stores a step-down converter 75 and a cooler 5 and is integrated with the first housing 3. A first protruding part 13 is provided on a side wall of the first housing 3 that is located adjacent to a coupling surface coupled to the second housing 4. A second protruding part 14 which is coupled to the first protruding part 13 when the second housing 4 is integrated with the first housing 3 is provided on a side wall of the second housing 4. A first refrigerant passage P1 is provided in the first protruding part 13, and a refrigerant pipe 23 of the lamination cooling unit 20 is connected with one end of the first refrigerant passage P1. A second refrigerant passage P2 is provided in the second protruding part 14, and a refrigerant pipe 6 of the cooler 5 is connected with one end of the second refrigerant passage P2. The first refrigerant passage P1 and the second refrigerant passage P2 communicate with each other in a housing 6 formed by the first housing 3 and the second housing 4 integrated with each other. |
