| 摘要 |
PURPOSE:To reduce the generation of noise, by a method wherein blades, with which the plural diffusers of an air guide are formed, are continuously formed. CONSTITUTION:An air guide 15 is situated in a casing 11, a blade 21, with which a diffuser 16 is formed, has its tip extended from a position, indicated by an imaginary line A, to the outer periphery of the air guide 15 to continuously form the blades 21. NZ noise is contained in an air flow exhausted from an impeller and is collided with the tip of the blade 21, but since the blade is formed in an endless shape, exaggeration of NZ noise due to collision is prevented from occurring, and the generation of noise of a blower itself can be reduced.
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