Fan

Abstract

A fan assembly for generating an air flow within a room includes a casing having a plurality of inlet sections and an outlet section for receiving air from the inlet sections. Each inlet section has an air inlet, an impeller and a motor for driving the impeller to draw an air flow through the air inlet section and into the air outlet section. The outlet section has an interior passage for receiving air from the inlet sections and an air outlet. The casing defines a bore about which the interior passage extends and through which a secondary air flow from outside the fan assembly is drawn by the air emitted the air outlet.

1 . A fan assembly for generating an air flow within a room, the fan assembly comprising a casing having a plurality of inlet sections and a plurality of outlet sections each for receiving air from a respective inlet section, each inlet section comprising an air inlet, an impeller and a motor for driving the impeller to draw an air flow through the air inlet section and into a respective air outlet section, each outlet section having an interior passage for receiving air from its respective inlet section and an air outlet, the casing defining a bore about which the outlet sections extend and through which air from outside the fan assembly is drawn by the air emitted from the outlet sections. 
     
     
         2 . The fan assembly of  claim 1 , wherein each inlet section is arcuate in shape. 
     
     
         3 . The fan assembly of  claim 1 , wherein each outlet section is arcuate in shape. 
     
     
         4 . The fan assembly of  claim 3 , wherein the inlet sections and the outlet sections are concentric. 
     
     
         5 . The fan assembly of  claim 3 , wherein the inlet sections have the same curvature as the outlet sections. 
     
     
         6 . The fan assembly of  claim 1 , wherein each outlet section is semi-circular in shape. 
     
     
         7 . The fan assembly of  claim 1 , wherein the outlet sections are located beneath the inlet sections. 
     
     
         8 . The fan assembly of  claim 1 , wherein the interior passage of each outlet section has a cross-section which varies about the bore. 
     
     
         9 . The fan assembly of  claim 8 , wherein the interior passage of each outlet section has a first end for receiving the air flow from its respective inlet section, and a second end located diametrically opposite to the first end, and wherein the cross-sectional area of the interior passage decreases from the first end to the second end. 
     
     
         10 . The fan assembly of  claim 1 , wherein the plurality of inlet sections comprises a first inlet section and a second inlet section, and wherein the plurality of outlet sections comprises a first outlet section for receiving air from the first inlet section and a second outlet section for receiving air from the second inlet section. 
     
     
         11 . The fan assembly of  claim 10 , wherein the first outlet section is located beneath the second inlet section, and the second outlet section is located beneath the first inlet section. 
     
     
         12 . The fan assembly of  claim 10 , wherein the air inlet of the first inlet section is co-planar with the air inlet of the second inlet section. 
     
     
         13 . The fan assembly of  claim 1 , wherein the casing comprises a first annular side wall defining the bore, a second side wall extending about the first side wall, an upper wall extending between the side walls, and a lower wall located opposite to the upper wall. 
     
     
         14 . The fan assembly of  claim 13 , wherein the separation between the upper wall and the lower wall varies about the bore. 
     
     
         15 . The fan assembly of  claim 13 , wherein the air outlets are located between the lower wall and the first side wall. 
     
     
         16 . The fan assembly of  claim 1 , wherein each air outlet comprises a slot. 
     
     
         17 . The fan assembly of  claim 1 , wherein each impeller is one of an axial flow impeller and a mixed flow impeller.