| 摘要 |
PURPOSE:To improve the performance in wind sending by providing, an inclined face which is gradually lowered as nearing from the almost central portion of a motor to an exhaust hole, on the rear portion of a motor frame. CONSTITUTION:A diffuser 25 with a passage extended to the outer periphery of an impeller 24 and air guide 29 with a return passage for guiding air current to the suction hole 22 of the motor 26. An exhaust hole 31 is installed on the rear end of a motor frame 30 and, on the rear portion thereof, an inclined face 37 which is gradually lowered as nearing from the almost central portion of the motor 26 to the exhaust hole 31 is formed. Therefore, it is possible to reduce the noise due to turbulence and collision so as to improve the performance in wind sending.
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