Device for generating a cold air flow in a preferred flow direction for cooling electrical components

摘要

The device has channel walls comprising mutually confronting inner sides, and an oscillation drive unit (42) generating oscillating movement of a partial region of the channel walls along direction toward other channel walls. The inner side of the channel walls comprises a surface structure designed for anisotropic flow, where the structure has smaller flow resistance coefficient along preferential flow direction than along direction extending at an angle to the preferential flow direction and in direction extending opposite to the preferential flow direction.