| 摘要 |
The unit has a housing (3) in which a fan is accommodated, and a filter, where the housing is transportable from a transport/storage position with a small volume into a usage position with a large volume and is made of plastic. The side walls (4, 6) of the housing are hinged on a frame (10), where the frame has an angular shape and the side walls have a trapezoidal shape. The walls are connected with each other in the usage position of the housing and are laid on top of each other in the storage position. The free edges of the walls define an assembly opening for the fan. |
