Air passage device e.g. outlet filter, has grill unit with rising or sloping section that merges into planar section, and holohedral section provided on planar section, where holohedral section works as blocking device

摘要

The device has a grill unit (30) arranged over an air outlet (21) at an air outlet side. The grill unit exhibits a rising or sloping section (35) and a planar section (36), where the rising or sloping section merges into the planar section. A holohedral section (32) is provided on the planar section, where the holohedral section works as a blocking device. The planar section and/or the holohedral section is arranged concentrically about the air outlet.