A Fan with improved suction performance

TLDR: In this paper, a fan with an improved induction performance comprises a plurality of main blades installed on a bell mouth unit, which inducts air, to induct and discharge air through the Bell mouth unit in accordance with the fan′s rotation.

Abstract: The present invention relates to a fan aimed at forcibly inducting and discharging air, thereby circulating the air. According to an embodiment of the present invention, the fan with an improved induction performance comprises a plurality of main blades installed on a bell mouth unit, which inducts air, to induct and discharge air through the bell mouth unit in accordance with the fan′s rotation, comprises: an edge extension unit extended to protrude towards the outside along the circumference of an end unit of the fan facing an end of the bell mouth; and a skirt unit extended from an end of the edge extension unit towards a side surface of the bell mouth to cover a gap generated between an end of the bell mouth and the edge extension unit such that the air reversely flowing through the gap generated between the edge extension unit and the bell mouth is prevented from being discharged. The internal diameter of the end of the bell mouth is the same as the internal diameter of the edge extension unit such that the inner circumferential surface of the bell mouth has continuity with the inner circumferential surface of the fan, and air resistance is reduced. Therefore, a drop in the induction properties due to the introduction of a reverse flow can be prevented and the air discharge properties can be improved.