Patent ID: 11971047
Assignee: GREENHECK FAN CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 14:
15. A low noise fan assembly, comprising:
an axial flow housing, manufactured as a single, seamless component without any welds, defining an inlet end and an outlet end aligned along a central longitudinal axis of the axial flow housing, the axial flow housing including an external housing component and an internal housing component cooperating to define an annulus, wherein one or more stator blades are positioned within the annulus between the internal housing component and the external housing component, and wherein the external housing component, internal housing component, and one or more stator blades are constructed of a non-metallic material having the effect of dampening vibration associated with operation;
a motor at least partially housed within the internal housing component; and
a mixed flow fan wheel having both axial and centrifugal airflow characteristics operably coupled to the motor and positioned in fluid communication with the annulus, wherein the internal housing component defines an exterior housing surface shaped to create a smooth transition between the internal housing component and an exterior fan surface of the mixed flow fan wheel, and the external housing component defines an inner housing surface shaped to create a smooth transition between the external housing component and the inner fan surface of the mixed flow fan wheel having the effect of reducing aerodynamic noise associated with turbulence.