SOUND INSULATION STRUCTURE FOR BLOWER

摘要

PROBLEM TO BE SOLVED: To provide a sound insulation structure for a blower especially effectively preventing generation of wind noise. SOLUTION: This sound insulation structure for the blower has a sound insulating tube part 2 forming a draft passage 4 provided on a blower main body 1 generating axial flow. Sound absorbing body 3 is installed inside of the sound insulating tube part 2. The draft passage 4 is formed to force wind passing through the sound insulating tube 2 from one end side to another end side to meander along an axis direction of the sound insulating tube part 2 in such a manner that the wind can not flow straightly, and total section area of the draft passage 4 at both end sides of the sound insulating tube part 2 is formed larger than total section area of the draft passage 4 at an axis direction center part of the sound insulating tube part 2. COPYRIGHT: (C)2005,JPO&NCIPI