Fan grill for a mosquito trap

Abstract

A fan grill for a mosquito trap is a board and has a center, a funnel-shaped shell, multiple air holes and a through hole. The shell is formed downward in the center and is tapered off to a bottom. The air holes are respectively formed through the shell and are arranged radially and spirally. The through hole is formed on the bottom of the shell. The radial and spiral air holes are designed according to direction of airflow created by a fan so allow the airflow to pass smoothly therethrough and to generate steady suction forces. Besides, hole diameters of the air holes are less than sizes of mosquitoes so trapped mosquitoes are prevented from escaping from between fan blades of the fan. Therefore, trapping efficiency is enhanced.

1 . A fan grill being a board and comprising:
 a center;   a funnel-shaped shell formed downward in the center and tapered off to a bottom;   multiple air holes respectively formed through the shell and arranged radially and spirally; and   a through hole formed on the bottom of the shell.   
     
     
         2 . The fan grill as claimed in  claim 1  further comprising a tube formed on and protruding from the bottom of the shell and including the through hole. 
     
     
         3 . The fan grill as claimed in  claim 1  being a rectangular board and further comprising four fastening holes respectively formed through four corners of the board. 
     
     
         4 . The fan grill as claimed in  claim 2  being a rectangular board and further comprising four fastening holes respectively formed through four corners of the board. 
     
     
         5 . The fan grill as claimed in  claim 1  further comprising
 a curved side; 
 three flat sides; 
 two positioning wings respectively formed on and protruding from the opposite flat sides; and 
 a locking segment formed to protrude downward from the other flat side and having a locking hole. 
 
     
     
         6 . The fan grill as claimed in  claim 2  further comprising
 a curved side; 
 three flat sides; 
 two positioning wings respectively formed on and protruding from the opposite flat sides; and 
 a locking segment formed to protrude downward from the other flat side and having a locking hole.