Buildings ventilation unit with air channel - has crosswalls to form air diverting layout with slit half channel width to deflect air stream

摘要

Building ventilation unit consists of a housing which is built into or on wall or roof opening and has an air channel bounded on opposite sides by flat walls. The channel (4) is also confined longitudinally by flat walls (5), from which alternately crosswalls (6, 7) project at right angles into the air channel itself. Thus any two crosswalls together cover the cross section of the channel and so diver the air flow in this. Pref. the unit should have several adjoining parallel channels, in which one longitudinal wall (5) carries two outer crosswalls at the end so as to form an U section, with a single intermediate cross wall (7) halfway up on the opposing wall of the channel. Pref. the free rims of the crosswalls should form a slit (10, 11) in conjunction with the opposing longitudinal walls (5, 5') the slit maximally half the channel width across.