Air stream channel for use in heating, ventilation and/or air conditioning system of motor car, has grid arranged at jump discontinuity for partly covering jump discontinuity, where grid is designed as plastic grid, wire grid or metal sheet

摘要

The channel (1) has a grid (3) arranged at a cross-sectional jump discontinuity for partly covering the jump discontinuity. A rectangular expansion chamber (2) is provided on a longitudinal side of the channel, where the grid covers more than forty percent of a cross-sectional area of the expansion chamber. The cross-sectional area is turned toward the channel. The grid is designed as plastic grid, wire grid or metal sheet with round or elongated openings. The grid comprises a mesh size from 0.5 mm up to 2.5 mm and a gate width of about 1.2 mm.