Patent attributes
An energy saving fan comprising a pellet (1), a hub (2) connected with the pellet (1) and a plurality of curve shaped blades (3) extended radially outward from the hub (2). The roots (31) of the adjacent blades (3) are connected by a curved shaped connecting part (32) extending from the trailing edge (33) of a previous blade to the leading edge (34) of a subsequent blade. A first reinforcing rib (41) is formed on a windward surface (35) of each blade (3) from a trailing edge corner (331) to the hub (2), a second reinforcing rib (42) is formed on a leeward surface (36) of each blade (3) from a leading edge corner (341) to the hub (2), and a third reinforcing rib (43) is formed on the leeward surface (36) of each blade (3) from the hub (2) to the trailing edge (33). These reinforcing ribs improve the strength of the blade roots and prolong the service life of the blades.
