Radiating device and fan impeller thereof

Abstract

The invention relates to a fan impeller comprising a hub and a plurality of blades, wherein the blades are radially distributed on the periphery of the hub; the hub comprises an air-in end and an air-out end, wherein the air-in end is opposite to the air-out end; a flow deflector is arranged between every two adjacent blades, and the radial lengths of the flow deflectors are shorter than those ofthe blades; the exterior outline of the hub is gradually reduced along a direction from the air-in end to the air-out end; and the blades and the flow deflectors extend to the center of the air-out end so as to guide air flows to the center of the air-out end. Compared with the prior art, the invention enables the air flows to be guided to the center of the air-out end, and the flow deflectors positioned among the blades further enhances flow guide effect, increases the air flows positioned near the central axis of the air-out end of the fan impeller and decreases areas with insufficient air flow communication. The invention also discloses a radiating device.

Description

technical field [0001] The invention relates to a cooling fan, in particular to an improved impeller structure of the cooling fan. Background technique [0002] The heat dissipation device is widely used in the field of heat dissipation of electronic devices. The heat dissipation device includes a heat dissipation body and a heat dissipation fan. The heat dissipation body includes a plurality of heat dissipation fins arranged at intervals, and flow channels are formed between adjacent heat dissipation fins. and provide airflow to the radiator for enhanced heat dissipation. The existing heat dissipation fan includes an impeller, and the impeller includes a hub, which is cylindrical. Due to the obstruction of the hub, on the air outlet side of the impeller, the airflow cannot flow to the area directly below the hub, nor can it flow to the central position of the radiator. Image 6 It is the simulated flow field diagram of the existing impeller, most of the air flow flows out f...

AI Technical Summary

Problems solved by technology

Image 6 It is the simulated flow field diagram of the existing impeller, most of the air flow flows out from the edge of the impeller, and the air outlet side of the impeller directly faces the lack of air flow in the circular area below the hub, forming an air flow underflow area 21, that is, below the central position of the hub An airflow underflow area 21 is formed, and the center of the hub is often facing the radiator, and the temperature in the central area of ​​the radiator is the highest, so the airflow cannot perform effective heat exchange in the airflow underflow area 21, and the heat dissipation effect of the cooling fan cannot be fully exerted

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