| 摘要 |
PURPOSE: A ductless mixed-flow type ventilation fan is provided to improve a ventilation capacity and an air collection capacity and to reduce an air loss to an outlet. CONSTITUTION: A ductless mixed-flow type ventilation fan (40) includes a case (10), an impeller (20), and a turning vane (30). The case includes an inlet (11) and an outlet (12) in order to transfer the external air. The impeller is installed on the inlet side inside the case and rotated by a driving motor (22), thereby making the external air flow in and out. The turning vane, which is installed on the inner surface of the case, transfers a bypass flow of the air transferred by the impeller to an axial direction, thereby smoothly inducing the air to the outlet. |
