PROPELLER FAN AND REFRIGERATOR

摘要

PROBLEM TO BE SOLVED: To provide a propeller fan in which an air flow can be easily fed to an inner edge side of each of the blades, a blade surface pressure of pressure surface of each of the blades is uniformed and an air blowing efficiency can be improved.SOLUTION: There are provided a hub formed into a cylindrical shape or a truncated cone shape in respect to a rotating axis, a plurality of blades for forming air flow arranged in a radial manner at the outer surface of the hub to form an air flow flowing in an axial direction of the hub and a connecting ring member connecting the plurality of blades to each other. The connecting ring member comprises an annular member formed with a shape of the end surface at a vertical section has a thickness size in a radial direction smaller than a thickness size in an axial direction and a plurality of connecting parts for connecting the annular member to the front edges of the plurality of blades or locations near the front edges at negative pressure surfaces of the plurality of blades in such a way that the annular member may be positioned at a negative pressure surface of the blade.SELECTED DRAWING: Figure 1