Heat sink for inverter unit, has set of fin portions, component mounting space that is arranged on fin unit side of base and lateral-end fin portion provided with opening in vicinity of space, where portion forms side wall of space

摘要

The sink (20) has a base (21), a set of fin portions (22a) and a component mounting space (23) arranged on a fin unit side of the base. A lateral-end fin portion (22b) has an opening (24) in a vicinity of the space, where the portion forms a side wall of the space. The portions (22a) include a fin portion section comprising fin portions of shorter length than the portion (22b), where the fin portion section is laterally aligned with the space. The fin portion section is located upstream of the space with respect to a defined flow direction.