Rediation device and its fan frame structure

Abstract

A cooling device and its fan frame structure is a fan, which includes a fan frame structure and an impeller. The fan frame structure is used to hold the impeller therein. The fan frame structure includes an air inlet, an air outlet, and a columnar flow channel for guiding airflow from the air inlet to the air outlet, wherein the inner peripheral wall of the columnar flow channel at the air outlet end extends radially outwards with a smooth curve type expansion. The curved expansion part has a concave area, so that the airflow forms an airflow layer in the concave area, which is used to prevent the subsequent airflow from directly contacting the frame wall of the fan frame structure. The invention can reduce the noise generated by the wind flow due to the friction of the frame wall, achieve the effect of steady flow, and further improve the overall characteristics of the fan.

Description

technical field [0001] The invention relates to a cooling fan and its fan frame structure, in particular to a noise-reducing heat dissipation device and its fan frame structure. Background technique [0002] With the continuous improvement of the performance of electronic devices, cooling devices or cooling systems have become one of the indispensable equipment in current electronic devices, because if the heat energy generated by electronic devices is not dissipated properly, the performance will deteriorate at least, and the serious It may cause burning of the electronic device. [0003] The most widely used cooling device today is the fan. Please also refer to Figure 1A and Figure 1B , Figure 1A a schematic diagram of an existing fan is drawn, and Figure 1B shown as Figure 1A Sectional view along A-A' in the center. The traditional cooling fan 1 generally used is mainly composed of a fan frame 11 and an impeller 12. When the fan is running, a motor 13 can be used...

AI Technical Summary

Problems solved by technology

However, as the fan frame 11 is partially cut away to form the notch E, although the area where the airflow flows out can be increased, it will relatively cause the disadvantage that the airflow is easy to disperse

[0005] However, whether Figure 1B , Figure 1C , Figure 1D or Figure 1E In the fan frame, when the airflow flows to the air outlet 114, the airflow will directly rub against the inner wall periphery of the columnar flow channel (such as Figure 1B shown), or directly rub against the chamfer, inclination angle C, arc angle D, or the wall edge of the notch E, so that the airflow is blocked, causing the flow velocity to slow down and the wind pressure to decrease

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