| 摘要 |
The present invention relates to an air supply device for obtaining zones of clean air in premises, said air supply device ( 1 ) comprising at least one air permeable body ( 11 ) including at least one inner and at least one outer part ( 12, 13 ) of which the inner part ( 12 ) consists of or includes porous material. A fan device is provided to bring air, which is to be supplied to the premises ( 2 ), to flow through the air permeable body ( 11 ) at low air velocity. A device is provided to see to that the air (A) supplied to the premises ( 2 ) has a lower temperature than the air in said premises ( 2 ). The air permeable body ( 11 ) has, in cross section, the shape of parts of a circle or substantially a circle or primarily parts of a circle or substantially a circle. The outer part ( 13 ) has passages which are substantially rectilinear, substantially uniform in thickness and located close to each other, said passages further having a length which is at least four times greater than their width in order to generate rectilinear and uniformly distributed partial air streams. |
