Axial flow fun

Abstract

The invention is directed to dual purposes of increasing air volume and reducing noises of an inline axial flow fan. In the inline axial flow fan including a first axial flow fan unit 100 - 1 , a first honeycomb 200 - 2 , a second axial flow fan unit 100 - 2 and a second honeycomb 200 - 2 which are arranged in the order starting from an upstream side in an air flow direction, the first honeycomb includes a stator vane configured to be warped in a “U” shape against a rotation direction of the first axial flow fan unit, while the second honeycomb includes a stator vane configured to direct a trailing edge thereof in parallel to the air flow direction.

1 . An axial flow fan comprising: a first axial flow fan unit disposed on an upstream side with respect to an air flow; a first honeycomb disposed downstream of the first axial flow fan unit; a second axial flow fan unit disposed downstream of the second honeycomb; and a second honeycomb disposed downstream of the second axial flow fan unit,
 wherein a stator vane constituting the first honeycomb is configured to be warped against a rotation direction of the first axial flow fan unit, while a stator vane constituting the second honeycomb is configured to direct a trailing edge thereof in parallel to a direction of the air flow.   
     
     
         2 . The axial flow fan according to  claim 1 , wherein the stator vane constituting the first honeycomb is warped in a “U” shape. 
     
     
         3 . The axial flow fan according to  claim 1 , wherein the stator vane constituting the first honeycomb is divided into two parts. 
     
     
         4 . An axial flow fan comprising: a first axial flow fan unit disposed on an upstream side with respect to an air flow; a first honeycomb disposed downstream of the first axial flow fan unit; a second axial flow fan unit disposed downstream of the first honeycomb; and a second honeycomb disposed downstream of the second axial flow fan unit, the second axial flow fan unit rotating in a different way from the first axial flow fan unit,
 wherein a stator vane constituting the first honeycomb is configured to direct a ventral side thereof against a rotation direction of the first axial flow fan unit, while a stator vane constituting the second honeycomb is configured to direct a trailing edge thereof in parallel to a direction of the air flow.   
     
     
         5 . The axial flow fan according to  claim 1 , comprising an inline axial flow fan that uses the first and second axial flow fan units and the first and second honeycombs as a cooling device for server apparatuses. 
     
     
         6 . The axial flow fan according to  claim 2 , comprising an inline axial flow fan that uses the first and second axial flow fan units and the first and second honeycombs as a cooling device for server apparatuses. 
     
     
         7 . The axial flow fan according to  claim 3 , comprising an inline axial flow fan that uses the first and second axial flow fan units and the first and second honeycombs as a cooling device for server apparatuses. 
     
     
         8 . The axial flow fan according to  claim 4 , comprising an inline axial flow fan that uses the first and second axial flow fan units and the first and second honeycombs as a cooling device for server apparatuses.