Fan

Abstract

A fan assembly includes a fan and a screen. The fan includes a bracket, and an impeller installed in the bracket. The bracket includes two opposite sidewalls each defining an opening aligning with the impeller. A hollow fixing frame is mounted to an outer surface of one of the sidewalls surrounding four sides of the corresponding opening. The fixing frame includes a receiving portion surrounding three of the four sides of the opening, and a cover detachably connected to distal ends of the receiving portion, to surround the last side of the opening. The screen is received in the fixing frame and aligns with the openings.

What is claimed is: 
     
         1 . A fan, comprising:
 a main body comprising a bracket and an impeller installed in the bracket, the bracket comprising two opposite sidewalls each defining an opening aligning with the impeller; and   a hollow fixing frame mounted to an outer surface of one of the two sidewalls, the fixing frame comprising a receiving portion surrounding a bottom and two opposite sides of the opening of the sidewall, and a cover detachably covered on a top of the receiving portion.   
     
     
         2 . The fan of  claim 1 , wherein the receiving portion comprises two arms respectively at opposite sides of the opening, and a bottom plate connected between bottom ends of the arms below the opening, a longitudinally extending recess is defined in an inner surface of each arm facing the opposite arm. 
     
     
         3 . The fan of  claim 2 , wherein a top end of each arm is higher than the opening and lower than a top of the sidewall, the cover is covered on the top ends of the arms, parallel to the bottom plate. 
     
     
         4 . The fan of  claim 3 , wherein a latching slot is defined in a top of the inner surface of each arm, the cover comprises an elongated plate, and two blocks respectively extending down from opposite ends of a bottom of the plate, to respectively engage in the latching slots of the arms. 
     
     
         5 . A fan assembly, comprising:
 a fan comprising a bracket, and an impeller installed in the bracket, the bracket comprising two opposite sidewalls each defining an opening aligning with the impeller, wherein a hollow fixing frame is mounted to an outer surface of one of the sidewalls surrounding four sides of the corresponding opening, the fixing frame comprises a receiving portion surrounding three of said four sides of the opening, and a cover detachably connected to distal ends of the receiving portion, to surround the last side of the opening; and   a screen received in the fixing frame and aligning with the openings.   
     
     
         6 . The fan assembly of  claim 5 , wherein the receiving portion comprises two arms respectively at opposite sides of the opening, and a bottom plate connected between first ends of the arms, a longitudinally extending recess is defined in an inner surface of each arm facing the opposite arm. 
     
     
         7 . The fan assembly of  claim 6 , wherein the cover is detachably connected to second ends of the arms away from the first ends, and parallel to the bottom plate. 
     
     
         8 . The fan assembly of  claim 7 , wherein a latching slot is defined in the inner surface of the second end of each arm, the cover comprises an elongated plate, and two blocks respectively extending from opposite ends of the plate, to respectively engage in the latching slots of the arms. 
     
     
         9 . The fan assembly of  claim 5 , wherein the screen is a dust filter. 
     
     
         10 . The fan assembly of  claim 5 , wherein the screen is a finger guard.