| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrain turbulence of an air flow in a bell mouth part. <P>SOLUTION: Among an outer wall surface of a scroll casing 74, a suction side outer wall surface 74c continuing with the bell mouth part 76 is formed in a flat shape without a level difference. Thus, since the occurrence of turbulence such as a vortex in suction air flowing toward a suction port 75 can be restrained, turbulence of the air flow in the bell mouth part 76 can be restrained, and induction of a new vortex loss and noise can be prevented. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
