Importance

Loading Importance Indicators...

Abstract

In a casing 11, a rear guide 23 is formed above a cylindrical impeller 13 and a stabilizer 24 is formed below the impeller. A minimum gap dimension between the cylindrical impeller 13 and the stabilizer 24 on the outlet port 17 side has a value of 14% to 24% of the outer diameter of the cylindrical impeller 13. An angle between a straight line connecting the center of rotation of the cylindrical impeller 13 and a minimum gap position on the outlet port 17 side of the stabilizer 24 and the horizontal plane has a value of 38.degree. to 43.degree.. A minimum gap dimension between the cylindrical impeller 13 and the stabilizer 24 on the inlet port 16 side has a value of not smaller than 7% of the outer diameter of the cylindrical impeller 13. An angle between a straight line connecting the center of rotation of the cylindrical impeller 13 and a minimum gap position on the inlet port 16 side of the stabilizer 24 and the vertical plane has a value of 11.degree. to 15.degree.. Further, the cylindrical impeller 13 is arranged horizontally perpendicularly to the direction in which the inlet port 16 and the outlet port 17 are connected in the casing 11, the rear guide 23 is formed above the cylindrical impeller 13 and the stabilizer 24 is formed below the impeller. A portion on the outlet port side of at least one of the rear guide and the stabilizer is provided by a diffuser which can change the direction of air blow by pivoting around pivot axes 25a and 26a.

Loading the Abstract Image...

First Claim