| 摘要 |
The impeller of a cross flow fan is capable of reducing a blade passing frequency to thereby minimize the generation of noise, without any transformation of the impeller, a stabilizer, a rear guider or any extension of gap therebetween. The impeller of the cross flow fan includes a unit fan which is comprised of at least one or more stage, the unit fan having a pitch angle of wing of periodicity of sine function.
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