| 摘要 |
PROBLEM TO BE SOLVED: To prevent noise from largely increasing in a specific frequency when air flows from a bell mouth to a fan by improving the structure of the bell mouth in an air cleaner. SOLUTION: The air cleaner is provided with a housing, a filter unit and the fan disposed inside the housing, and the bell mouth disposed on a suction side of the fan, the bell mouth is provided with a mouth for inflow formed at the central section, a flowing guide extended towards from a circumferential edge of the mouth for inflow to the fan, and a flattened section formed by cutting off a part of section in the flowing guide so as to allow a distance between the fan and the bell mouth to be increased. The flattened section is formed in a section of almost 240-330°with a scroll starting point as a reference inside the bell mouth. The flattened section may be like saw blades so as to diffuse the air passing through the flattened section more effectively. COPYRIGHT: (C)2007,JPO&INPIT |
