Plenum box

摘要

The invention relates to a plenum box (1a, 1b) configured for use in a ventilation system (2) with flowing air in order to be able to quickly regulate flows between the ventilation system (2) and a room. The plenum box (1) comprises a pressure distribution pipe (4) which is disposed in an inlet (3) to the plenum box (1) and which itself comprises a regulating damper (5), and an outlet (6a, 6b). The inlet (3) is configured to have an air flow (7) passing through it. The pressure distribution pipe (4) extends inside the plenum box (1a, 1b) from the inlet (3), and the surface of the pressure distribution pipe (4) has perforations (8) which allow the air flow (7) to pass through them between the inside (9) and outside (10) of the pressure distribution pipe (4). The regulating damper (5) is disposed adjustably in the axial direction (11) inside the pressure distribution pipe (4) whereby the total aperture cross-section (12) of the perforations (8) per unit length varies in the axial direction (11) of the pressure distribution pipe (4).

主权项

1. A plenum box configured for use in a ventilation system with flowing air, which plenum box comprises a pressure distribution pipe which is disposed in an inlet to the plenum box, and an outlet, whereby the inlet is configured for an air flow to pass through it, the pressure distribution pipe extending inside the plenum box from the inlet and having an axial direction, a regulating damper, a first section, and a second section, wherein a surface of the pressure distribution pipe has perforations which allow the air flow to pass through them between an inside and an outside of the pressure distribution pipe wherein a total aperture cross-section of the perforations per unit length in the first section is different relative to a total aperture cross-section of the perforations per unit length in the second section as viewed in the axial direction and the regulating damper is disposed adjustably in the axial direction inside the pressure distribution pipe and is configured to angle an incoming air flow from the ventilation system towards the perforations, wherein a displacement in the axial direction of a position of the regulating damper from the first section to the second section is arranged to alter the air flow through the pressure distribution pipe non-linearly.