Patent ID: 6071070
Filing Date: 2000-06-06
Classification: B60H,F04D

Abstract:
Air-conditioning equipment for vehicles, comprising a casing having an inlet port and an outlet port arranged in positions approximately opposite from each other and being internally provided with a cylindrical impeller arranged horizontally perpendicularly to a direction in which said inlet port and said outlet port are connected, a rear guide formed above said cylindrical impeller and a stabilizer formed below said cylindrical impeller, whereina minimum gap dimension t1 between said cylindrical impeller and said stabilizer on the outlet port side,an angle between a straight line connecting a center of rotation of said cylindrical impeller and a position of the minimum gap dimension t1 on the outlet port side of said stabilizer and a horizontal plane,a minimum gap dimension t2 between said cylindrical impeller and said stabilizer on the inlet port side,an angle between a straight line connecting the center of rotation of said cylindrical impeller and a position of the minimum gap dimension t2 on the inlet port side of said stabilizer and a vertical plane have values chosen to prevent occurrence of a whistle noise and a surging noise,further wherein said dimension t1 is not smaller than 14% and not greater than 24% of an outer diameter of the cylindrical impeller,said angle ""a"" is not smaller than 38.degree. and not greater than 43.degree.,said dimension t2 is not smaller than 7% and not greater than 13% of the outer diameter of the cylindrical impeller, andsaid angle ""b"" is not smaller than 11.degree. and not greater than 15.degree..