| 摘要 |
PURPOSE: A two-impeller jet fan of a track-type outlet is provided to reduce a Coanda effect and a wall friction loss generated around an intake muffler and an outlet. CONSTITUTION: A two-impeller suction fan of a track-type outlet comprises a ventilation housing unit(30), a discharge muffler(20), and an outlet(10). The discharge muffler includes a discharge muffler perforated screen. The discharge muffler perforated screen includes a discharging current guiding unit in the inner circumference. The discharging current guiding unit is spaced from the inner circumference of the discharge muffler perforated screen at a predetermined space in a longitudinal direction. The ventilation housing unit includes a ventilating device in which a mixed fan and an axial-flow fan are formed in one motor shaft. |
