AXIAL-FLOW FAN WITH AN IMPROVE A SHAPE OF THE INNER SURFACE OF A VENTURI CASING SURROUNDING THE OUTER CIRCUMFERENCE OF A DIAMETER DIRECTION OF AN IMPELLER

摘要

PURPOSE: An axial-flow fan is provided to suction fluid around an inlet and to increase an air volume.;CONSTITUTION: An axial-flow fan(100) comprises an impeller and a venturi casing(30). The impeller is mounted in a rotary shaft of a rotation-driving device. The venturi casing surrounds the circumference of a diameter direction of the impeller and includes an inlet and an outlet facing each other in an axial direction of the rotary shaft. The inner surface of the venturi casing includes: an inlet side inclination unit(31) expanding the inlet to an outer side of the diameter direction of the impeller; a straight unit(32) forming an axial flow of fluid with the impeller by being continued from the inlet side inclination unit; an outlet side inclination unit(34) expanding the outlet to the outer side of the diameter direction of the impeller; and a curved unit(33) connecting the straight unit and the outlet side inclination unit.;COPYRIGHT KIPO 2013