Axial flow fan
AssigneeValeo Thermique Moteur
InventorAhmad Alizadeh
Life of this patent
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Abstract
An axially compact axial flow fan with improved air-moving properties has a first array of fan blades that extend radially from a fan hub to a circumferential blade support member, a second array of fan blades extend from the first support member to a radially outward second circumferential blade support member. The fan blades in the second array each enjoy pitch angles that decrease from the second circumferential blade support radially along only a portion of each blade length. Thereafter, the pitch angles for the blades in the second array remains constant to the second circumferentially extending blade support member.
Claims22
A fan having an axial direction of flow comprising a hub portion having secured thereto a first plurality of first blades extending therefrom radially outwardly to a first circumferentially-extending blade support member, a second plurality of second blades extending radially outwardly from the first support member, and each second blade in the second blade plurality establishes a pitch angle relative to the axial direction of flow in which the pitch angle decreases along a portion of the radial extent from the first blade support member and outwardly thereof for each of the second blades in the second blade plurality, the second blade pitch angles remaining substantially constant thereafter.
A fan having an axial direction of flow comprising a hub portion having secured thereto a first plurality of first blades extending therefrom radially outwardly to a first circumferentially-extending blade support member, and a second plurality of second blades extending radially outwardly from the first support member wherein the second plurality of second blades extend to a second circumferentially-extending blade support member, and each second blade in said second blade plurality establishes a pitch angle relative to the axial direction of flow in which the pitch angle decreases along a portion of the radial extent from the first blade support member and outwardly thereof for each of the second blades in the second blade plurality, the second blade pitch angles remaining substantially constant thereafter.
Dependencies are inferred from the claim text.