| 摘要 |
<p>An axial flow fan combining a shroud (12) defining a fluid pathway (34) coaxial with the shroud (12), a motor (30) having a rotatable shaft (28) mounted within the fluid pathway (34) coaxial with the shroud (12), an impeller (14) mounted to the shaft (28) with the impeller (14) having a hub (16) having a face (20) across the fluid pathway (34) and having an edge (24) at the radial perimeter of the hub (16) and having a plurality of blades (18) mounted radially to the edge (24) of the hub (16) and a set of guide vanes (32) disposed axially with respect to the impeller (14) and mounted within the fluid pathway (34). The hub (26) has at least one face orifice (22) in the face (20) of the hub (16) communicating with at least one edge orifice (26) in the edge (24) of the hub (16) allowing fluid to flow through the hub, providing both axial fluid flow (36) and hub fluid flow (38) through the fan.</p> |
