FIELD: ventilation.
SUBSTANCE: designed is a propeller fan, which includes a hub with an oval shape in axial direction, set of blades, which extend from hub, and at least one stiffness rib, which extends from hub and is formed closer to front edge of each of multiple blades.
EFFECT: due to this configuration propeller fan has efficiency and stiffness, and reduced weight and cost of material of propeller fan.
12 cl, 8 dwg
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RU2696834C2 |
