Patent ID: 9022722
Filing Date: 2015-05-05
Classification: F04D

Abstract:
1. A frame assembly of a ring-type fan with a pressure releasing function, including: a fan wheel having a hub and a plurality of blades, the blades being circumferentially provided on an outer periphery of the huh, each of the blades having a fixed end and a free end, the fixed ends of the blades being connected to an outer periphery of the hub; a frame body having an accommodating space for accommodating the fan wheel therein and a shaft portion, the shaft portion being formed in the center of the frame body and pivotally connected to the fan wheel; and a pressure-releasing portion formed on the free ends of the blades, the pressure-releasing portion having a stopping wall and a flange extending outwards from one end of the stopping wall, a pressure-releasing channel being defined by the stopping wall and an inner wall of the frame body; wherein one side of the frame body is provided with an extension portion to face the flanges the extension portion being obliquely extending from one side of the releasing port in communication with the pressure-releasing channel, a width of the pressure-releasing port being larger than that of the pressure-releasing channel; and wherein the pressure-releasing channel is substantially formed into an L shape.