Axial fan for hvac system

Abstract

An axial fan for a heating, ventilation, and air conditioning (HVAC) system includes a blade having a blade body and a mounting portion, where the mounting portion includes a rib extending radially outward relative to a central axis of the blade. The axial fan also includes a hub having a cavity configured to receive the mounting portion of the blade, where the hub includes a plurality of grooves formed therein, each groove of the plurality of grooves is configured to receive the rib of the mounting portion of the blade, and the plurality of grooves corresponds to a plurality of orientations of the blade relative to the hub.

1 . An axial fan for a heating, ventilation, and air conditioning (HVAC) system, comprising:
 a blade comprising a blade body and a mounting portion, wherein the mounting portion comprises a rib extending radially outward relative to a central axis of the blade; and   a hub comprising a cavity configured to receive the mounting portion of the blade, wherein the hub comprises a plurality of grooves formed therein, each groove of the plurality of grooves is configured to receive the rib of the mounting portion of the blade, and the plurality of grooves corresponds to a plurality of orientations of the blade relative to the hub.   
     
     
         2 . The axial fan of  claim 1 , wherein the hub comprises a first hub section and a second hub section configured to couple to one another to form the hub. 
     
     
         3 . The axial fan of  claim 2 , wherein the first hub section comprises a first hub recess, the second hub section comprises a second hub recess, and the first hub recess and the second hub recess cooperatively define the cavity of the hub in an assembled configuration of the hub. 
     
     
         4 . The axial fan of  claim 3 , wherein the rib is a first rib, the plurality of grooves is a first plurality of grooves, the first plurality of grooves is formed in the first hub section, the second hub section comprises a second plurality of grooves formed therein, the mounting portion of the blade comprises a second rib extending radially outward relative to the central axis of the blade, and each groove of the second plurality of grooves is configured to receive the second rib of the mounting portion of the blade. 
     
     
         5 . The axial fan of  claim 4 , wherein the first rib and the second rib are disposed opposite one another relative to the central axis of the blade. 
     
     
         6 . The axial fan of  claim 1 , comprising a pitch indicator system configured to visually indicate a particular orientation of the plurality of orientations of the blade relative to the hub. 
     
     
         7 . The axial fan of  claim 6 , wherein the pitch indicator system comprises indicia formed in the mounting portion of the fan. 
     
     
         8 . The axial fan of  claim 7 , wherein the indicia comprise a plurality of markings, and each marking of the plurality of markings corresponds to a respective orientation of the plurality of orientations. 
     
     
         9 . The axial fan of  claim 8 , wherein the pitch indicator system comprises an indicator formed in the hub, and the indicator is configured to align with a respective marking of the plurality of markings in each orientation of the plurality of orientations. 
     
     
         10 . The axial fan of  claim 1 , wherein the blade body comprise a blade root and a blade tip, the blade root is defined by a first airfoil profile, and the blade tip is defined by a second airfoil profile different from the first airfoil profile. 
     
     
         11 . The axial fan of  claim 10 , wherein the first airfoil profile and the second airfoil profile are linearly blended with one another along a length of the blade body. 
     
     
         12 . An axial fan, comprising:
 a hub comprising a first hub section and a second hub section configured to couple to one another to form a blade cavity, wherein the first hub section comprises a plurality of grooves formed in an inner surface of the first hub section; and   a blade comprising a blade body and a mounting boss, wherein the mounting boss comprises a rib extending therefrom, and wherein the rib is configured to extend individually within the plurality of grooves to orient the blade at a plurality of pitch angles relative to the hub.   
     
     
         13 . The axial fan of  claim 12 , wherein the blade is configured to rotate about a central axis of the blade with the mounting boss disposed within the blade cavity to transition the blade between the plurality of pitch angles and to engage the rib with each groove of the plurality of grooves. 
     
     
         14 . The axial fan of  claim 13 , wherein the rib and each groove of the plurality of grooves extends in a direction along the central axis of the blade. 
     
     
         15 . The axial fan of  claim 14 , wherein the blade body comprise a blade root and a blade tip, the blade root is defined by a first airfoil profile, the blade tip is defined by a second airfoil profile different from the first airfoil profile, and the first airfoil profile and the second airfoil profile are blended with one another along a length of the blade body. 
     
     
         16 . The axial fan of  claim 12 , wherein the mounting boss comprises a circular cross-sectional profile, and the blade cavity comprises an oblong cross-sectional profile. 
     
     
         17 . The axial fan of  claim 12 , comprising a pitch indicator system configured to visually indicate a particular pitch angle of the plurality of pitch angles of the blade relative to the hub, wherein the pitch indicator system comprises:
 a plurality of markings corresponding to the plurality of pitch angles; and   an indicator configured to align with a particular marking of the plurality of markings corresponding to the particular pitch angle of the plurality of pitch angles.   
     
     
         18 . An axial fan for a heating, ventilation, and air conditioning (HVAC) system, comprising:
 a blade comprising a blade body, a mounting portion, and a rib integrally formed with the mounting portion and extending radially outward from the mounting portion relative to a central axis of the blade; and   a hub comprising a first hub section and a second hub section configured to couple to one another to form a cavity configured to receive the mounting portion of the blade, wherein the first hub section comprises a main body and a plurality of grooves integrally formed in the main body, and the rib is configured to extend individually within each groove of the plurality of grooves to orient the blade at a respective pitch of a plurality of pitches corresponding to each groove.   
     
     
         19 . The axial fan of  claim 18 , wherein the rib and each groove of the plurality of grooves extends in a direction along the central axis of the blade, and wherein the mounting portion of the blade is configured rotate within the cavity and about the central axis to position the rib within each groove of the plurality of grooves and adjust orient the blade in each pitch of the plurality of pitches. 
     
     
         20 . The axial fan of  claim 18 , wherein the blade body comprise a blade root and a blade tip, the blade root is defined by a first airfoil profile, the blade tip is defined by a second airfoil profile different from the first airfoil profile, and the first airfoil profile and the second airfoil profile are linearly blended with one another along a length of the blade body.