| 摘要 |
<p>A modular mixed flow fan (1) comprising a hub (2) being configured for rotation about an axis and a plurality of fan blades (3). A retention part (4) of each blade is received in openings (5) in an outer surface (6) of the hub, and each blade extending radially between opposite ends, one end forming a tip edge (7) and the other one forming a hub edge (8) from which the retention part protrudes. The hub edge is arch-shaped, and the outer surface of the hub is formed as a section of a sphere having a sphere centre (13). The section of the sphere is defined between a first plane (10) and a second plane (11) being parallel. Furthermore, a first diameter (L1) of the hub along the first plane is smaller than a second diameter (L2) of the hub along the second plane.</p> |
