| 摘要 |
<p>The invention relates to a fan with reversible direction of rotation for varying the direction of delivery, in particular for circulating air in timber drying installations, with blades fixed to the fan shaft, each blade having a minimum of two blade carriers extending more or less radially, which together carry one blade face. It is proposed according to the invention that, in order to adapt the blade faces to an ideal air guide or blade profile, the width of the flexible blade face (7) be greater than the respective internal space between the blade carriers (4) or the elastically extendable blade faces (7) be capable of bow-shaped expansion whilst rotating due to the air pressure so that the blade face (7) can move or bulge unhindered from one side to the other side of a plane defined by the two blade carriers (4) depending on the directions of rotation. <IMAGE></p> |
