Fan assembly

Abstract

A bladeless fan assembly includes a nozzle and a device for creating an air flow through the nozzle. The nozzle includes an interior passage, a mouth for receiving the air flow from the interior passage, and a surface located adjacent the mouth and over which the mouth is arranged to direct the air flow. The nozzle is mounted on a height adjustable pedestal.

1 . A bladeless fan assembly comprising a nozzle and a device for creating an air flow through the nozzle, the nozzle comprising an interior passage, a mouth for receiving the air flow from the interior passage, and a surface located adjacent the mouth and over which the mouth is arranged to direct the air flow, wherein the nozzle is mounted on a height adjustable pedestal. 
     
     
         2 . The fan assembly of  claim 1 , wherein the pedestal houses said device for creating an air flow. 
     
     
         3 . The fan assembly of  claim 2 , wherein the pedestal comprises a duct for conveying the air flow to the nozzle. 
     
     
         4 . The fan assembly of  claim 3 , wherein the pedestal comprises a base housing said device for creating an air flow, and wherein the duct extends between the base and the nozzle. 
     
     
         5 . The fan assembly of  claim 4 , wherein said device for creating an air flow comprises an impeller, a motor for rotating the impeller, and a diffuser located downstream from the impeller. 
     
     
         6 . The fan assembly of  claim 5 , comprising a plurality of vanes for guiding the air flow emitted from the diffuser into the duct. 
     
     
         7 . The fan assembly of  claim 5 , comprising a plurality of vanes each for guiding a respective portion of the air flow emitted from the diffuser towards the duct. 
     
     
         8 . The fan assembly of  claim 7 , comprising a plurality of radial vanes located at least partially within the duct, each of the radial vanes adjoining a respective one of the plurality of vanes. 
     
     
         9 . The fan assembly of  claim 1 , wherein the interior passage is shaped to divide the received air flow into two air streams each flowing along a respective side of the opening. 
     
     
         10 . The fan assembly of  claim 1 , wherein the interior passage is continuous. 
     
     
         11 . The fan assembly of  claim 1 , wherein the interior passage is substantially annular. 
     
     
         12 . The fan assembly of  claim 1 , wherein the mouth extends about the opening, and is preferably concentric with the interior passage. 
     
     
         13 . The fan assembly of  claim 1 , wherein the nozzle comprises an inner casing section and an outer casing section which together define the interior passage and the mouth. 
     
     
         14 . The fan assembly of  claim 13 , wherein the mouth comprises an outlet located between an external surface of the inner casing section of the nozzle and an internal surface of the outer casing section of the nozzle. 
     
     
         15 . The fan assembly of  claim 14 , wherein the outlet is in the form of a slot extending at least partially about the opening. 
     
     
         16 . The fan assembly of  claim 14 , wherein the outlet has a width in the range from 0.5 to 5 mm. 
     
     
         17 . The fan assembly of  claim 1 , wherein the surface comprises a Coanda surface. 
     
     
         18 . The fan assembly of  claim 17 , wherein the Coanda surface extends about the opening. 
     
     
         19 . The fan assembly of  claim 1 , wherein the nozzle comprises a diffuser surface located downstream of the mouth.