Vent stack for diffusing air flow in room, has pipe including lateral air flow separation unit, where pipe section narrows while approaching diffusion grid to create lateral air flows directed towards grid and converging one towards other

摘要

The stack (10) has a diffusion grid (25) arranged parallel to a longitudinal direction of the stack along a longitudinal pipe and diffusing a longitudinal air flow towards the exterior of the stack. The pipe has a section at the level of the grid in a plane (A) perpendicular to the longitudinal direction of the stack. The section narrows while approaching the grid to create lateral air flows, in the pipe, directed towards the grid and converging one towards the other. A lateral air flow separation unit is provided in the pipe.