| 摘要 |
The present invention relates to a centrifugal ventilator capable of assuring efficiency by forming a geometric size of a bell mouth to be an optimum state and improving ventilation efficiency as the D/R (D: radius of an air inlet, R: radius of an impeller) is planned in a range of 85-87%. The r/R (r: cross section radius of the bell mouth) is planned in a range of 8-10%. |
