| 摘要 |
A ventilation device/nozzle 4 for delivering air into a space, the nozzle 4 comprising an inlet 6 for air, an outlet for air and an air impingement surface 16 positioned between the inlet 6 and outlet, said air impingement surface 16 having a free edge 30 which defines an edge of a lower part of the outlet, said free edge 30 extending between a first point and a second point, wherein the length of the free edge 30 is greater than the distance between the first and second points. The free edge 30 of the nozzle 4 may include a convex region 26 with first and second regions 18, 20 either side of and contiguous with the convex region 26. The free edge 30 may be symmetrical. The convex region 26 may protrude from the impingement surface 16 to create a convex area 26. The nozzle 4 may be either round or rectangular and elongate (figures 8-11) in cross-section. There may be provided an assembly/ceiling tile 2 comprising an array of the nozzles 4 with the nozzles 4 configured such that a swirling air pattern is produced. |
