Fan guide

Abstract

Disclosed is a fan guide including a rectangular guide body located at a suction part of a fan, a central frame positioned at a central portion of the guide body, motor fixtures provided at an outer circumferential surface of the central frame, and frames for connecting the guide body and the central frame to each other while supporting the fan and a driving motor adapted to drive the fan. The frames are arranged around the central frame while being circumferentially spaced apart from one another by different angles, respectively. The arrangement of the frames is set so that intersections among lines extending inwardly along the frames beyond the central frame, respectively, discord from one another. By this arrangement, it is possible to decrease the degree of noise resulting from a blade passing frequency while destroying the regularity of a vortex shedding formed at each frame to reduce the interaction between a vortex flow and fan blades, thereby achieving a reduction in noise and flow loss.

What is claimed is:  
     
         1 . A fan guide comprising: 
 a rectangular guide body located at a suction part of a fan;    a central frame positioned at a central portion of the guide body;    motor fixtures provided at an outer circumferential surface of the central frame; and    at least two frames for connecting the guide body and the central frame to each other while supporting the fan and a driving motor adapted to drive the fan, the frames being arranged around the central frame while being circumferentially spaced apart from one another by different angles, respectively.    
     
     
         2 . A fan guide as claimed in  claim 1 , wherein the frames are arranged so that intersections among lines extending inwardly along the frames beyond the central frame, respectively, discord from one another.  
     
     
         3 . A fan guide as claimed in  claim 1 , wherein the central frame has a circular structure.  
     
     
         4 . A fan guide as claimed in  claim 1 , wherein each of the frames has a straight structure.  
     
     
         5 . A fan guide as claimed in  claim 1 , wherein each of th e frames has a curved structure.