Axial fan with tip fences
AssigneeCarrier Corporation
InventorRyan K. Dygert
Life of this patent
Estimating the term…
Abstract
An axial flow fan includes a generally hollow casing defining an inlet end and an outlet end of the axial flow fan. A diameter of the casing increases from the inlet end to the outlet end. An impeller is rotatably mounted within the casing. The impeller includes a hub and a plurality of fan blades extending from a root located at the hub to a blade tip. A diameter of the blade tip of each of the plurality of fan blades increases from the inlet end to the outlet end. A tip fence is located at the blade tip of at least one of the plurality of fan blades and a length of the tip fence measured perpendicular to the fan blades is greater than a thickness of the at least one of the plurality of fan blades.
Claims22
An axial flow fan comprising:
- a generally hollow casing defining an inlet end and an outlet end of the axial flow fan, wherein a diameter of the casing increases from the inlet end to the outlet end;
- an impeller rotatably mounted within the casing, the impeller including:
- a hub;
- a plurality of fan blades extending from a root at the hub to a blade tip, wherein a diameter of the blade tip of each of the plurality of fan blades increases from the inlet end to the outlet end;
- and
- a tip fence located at the blade tip of at least one of the plurality of fan blades, wherein a length of the tip fence measured perpendicular to the fan blades is greater than a thickness of the at least one of the plurality of fan blades.
A refrigerated merchandiser comprising:
- a cabinet defining a product display area and having a compartment separate from the product display area;
- an air circulation circuit fluidly coupling the compartment and the product display area;
- and
- an air circulating fan for moving a flow of air axially through the air circulation circuit, the air circulating fan including:
- a generally hollow casing, wherein a diameter of the casing increases along an axial length of the air circulating fan;
- a fan rotor rotatably mounted within the casing and having a hub and a plurality of fan blades mounted at a root to the hub and extending to a blade tip, wherein a diameter of the blade tip of each of the plurality of fan blades increases along an axial length of the air circulating fan;
- and
- a tip fence located at a tip of at least one of the plurality of fan blades, wherein an axial length of the tip fence is greater than a thickness of the at least one of the plurality of fan blades.
Dependencies are inferred from the claim text.