Apparatus for reducing air turbulence in a fan chassis

Abstract

An apparatus for reducing air turbulence in a fan chassis. The chassis including a cutwater extending from a base of the chassis in a continuous or stepwise manner. Wherein a portion of the cutwater extends at one or more acute angles to an axis orthogonal to the base or an axis of an impeller mount of the chassis. Wherein the cutwater may include an aperture or recess that extends from a proximal portion of the cutwater to a distal portion of the cutwater.

1 . An interior wall of a fan chassis, wherein the interior wall comprises a cutwater, wherein the cutwater extends vertically from a base of the fan chassis at an acute lean angle to an axis orthogonal to the base and wherein the cutwater further comprises a tunnel extending through the cutwater, the tunnel having a diameter. 
     
     
         2 . The interior wall of  claim 1 , wherein the cutwater further extends vertically from the base at an acute inclination angle to the axis orthogonal to the base. 
     
     
         3 . The interior wall of  claim 1 , wherein the cutwater extends stepwise from the base. 
     
     
         4 . (canceled) 
     
     
         5 . The interior wall of  claim 1 , wherein the cutwater comprises an acoustic dampening material. 
     
     
         6 . A cutwater for an interior wall of a fan chassis, the cutwater comprising a tunnel that extends through the cutwater from a proximal portion of the cutwater to a distal portion of the cutwater, the tunnel having a diameter of at least 0.5 millimeters and at most 1 millimeters. 
     
     
         7 . (canceled) 
     
     
         8 . The cutwater of  claim 6 , wherein the proximal portion extends toward an outlet of the fan chassis and the distal portion extends away from the outlet. 
     
     
         9 . The cutwater of  claim 8 , wherein the cutwater further comprises a fold between the proximal portion and the distal portion of the cutwater. 
     
     
         10 . The cutwater of  claim 8 , wherein the tunnel extends at least partially along a tangent of a curve of the interior wall, wherein the tangent is adjacent to the distal end of the face. 
     
     
         11 . The cutwater of  claim 6 , wherein the tunnel is tangent to a circle originating at an impeller mount of the fan chassis. 
     
     
         12 . A cutwater for an interior wall of a fan chassis, the cutwater comprising a fold, wherein the fold inflects at a fold axis, wherein a bend radius of the fold increases as the fold axis extends vertically away from a base of the fan chassis, and wherein the cutwater further comprises a tunnel, the tunnel having a diameter of at least 0.5 millimeters and at most 1 millimeters. 
     
     
         13 . The cutwater of  claim 12 , wherein the fold axis extends from the base at one or more acute angles to an axis orthogonal to the base. 
     
     
         14 . The cutwater of  claim 13 , wherein the one or more acute angles are an inclination angle and/or a lean angle. 
     
     
         15 . The cutwater of  claim 12 ,
 wherein the fold is between a proximal portion of the cutwater and a distal portion of the cutwater,   wherein the proximal portion extends toward an outlet of the fan chassis and the distal portion extends away from the outlet, and   wherein the tunnel extends from the proximal portion to the distal portion.   
     
     
         16 . The cutwater of  claim 12 , wherein the fold extends stepwise from the base. 
     
     
         17 . A centrifugal fan, wherein a chassis of the centrifugal fan comprises the cutwater of  claim 12 , wherein the fold axis extends from the base at one or more acute angles to a rotational axis of an impeller of the centrifugal fan. 
     
     
         18 . The centrifugal fan of  claim 17 , wherein the height of the chassis is at least 11 millimeters and at most 13 millimeters. 
     
     
         19 . The centrifugal fan of  claim 17 , wherein a blade height of the impeller is at least 8 millimeters and at most 10 millimeters. 
     
     
         20 . The centrifugal fan of  claim 17 , wherein the chassis comprises an acoustic dampening material. 
     
     
         21 . The cutwater of  claim 1 , wherein the diameter of the tunnel is at least 0.5 millimeters and at most 1 millimeters.