MIXED FLOW FAN ASSEMBLY

摘要

Fan assemblies, and in particular fan wheels and stator assemblies for fan assemblies, are disclosed. In one embodiment, the fan wheel includes a wheel back having an outer surface forming one of a curved dome-shape and a truncated cone-shape. The fan wheel may also include a plurality of fan blades radially spaced about and mounted to the outer surface of the wheel back. In one embodiment, each of the fan blades is formed from a segment of an airfoil-shaped aluminum extrusion defining at least one internal cavity. The fan blade first ends can be provided with a compound cut profile with at least one curved cut such that the first end of the blade is mounted flush to the wheel back outer surface. The stator assembly can also be provided with a plurality of stator blades formed from airfoil-shaped aluminum extrusion segments and provided with compound cut profiles.

主权项

1. A fan assembly comprising:
(a) an outer housing; (b) an electric drive motor; (c) a mixed-flow fan wheel disposed within the outer housing and coupled to the electric drive motor, the fan wheel comprising:
i. a base having an outer surface forming one of a truncated dome-shape and a truncated cone-shape;ii. a plurality of fan blades radially spaced about and mounted to the base outer surface:
1. each of the fan blades having a first end and a second end, the first end being mounted to the base and being oriented with respect to the base to define an interface contour projection at the wheel back outer surface;2. each of the fan blades being formed from a segment of an airfoil-shaped aluminum extrusion defining at least one internal cavity;3. the fan blade first end having a compound cut profile with at least one curved cut, the compound cut profile matching the first interface contour projection such that the first end of the blade is mounted flush to the base outer surface; (d) an inlet structure defining a truncated cone shaped wheel cone portion, the inlet structure being rigidly mounted to the outer housing, wherein at least a portion of the fan blade second ends extend into the wheel cone portion.