Radiator-Shroud Structure

Abstract

A shroud 15 attached to an air discharge side of a radiator 13 narrows toward a centrifugal-flow-type rotary fan 11 and forms a cylindrical shape. A surrounding portion 17 is provided so as to surround the rotary fan 11 , and a guide portion 19 extending in the centrifugal direction of the rotary fan 11 is provided at the end of the surrounding portion 17 . The length of the guide portion 19 is about 6% the diameter of the rotary fan 11 . Since this mitigates turbulence of centrifugally flowing air 21 flowing out of the rotary fan 11 and suppress a drop in the amount of air passing through the radiator 13 , the cooling capacity of the radiator 13 can be enhanced.

1 . A radiator-shroud structure comprising:
 a rotary fan which produces a centrifugal flow of air;   a radiator provided in the vicinity of the rotary fan; and   a shroud for forming an air guide passage extending from the radiator toward the rotary fan, the radiator-shroud structure being characterized by comprising:   a surrounding portion which surrounds the outer circumference of the rotary fan at one end of the shroud; and   a guide portion extending from a circumferential edge of the surrounding portion in a radially outward direction.   
     
     
         2 . A radiator-shroud structure according to  claim 1 , wherein the guide portion has a width about 6% the diameter of the rotary fan.