Centrifugal heat dissipation fan

Abstract

A centrifugal heat dissipation fan including a housing and an impeller is provided. The housing has at least one flow inlet. The impeller assembled in the housing and rotating about an axial direction includes a hub and a plurality blades disposed around the hub. The flow inlet is located in the axial direction and faces the hub. Each of the blades has a wing tab next to the flow inlet, and the wing tab extends from a main surface of the blade to another blade. The wing tab has an inclined surface facing toward a periphery of the flow inlet along a radial direction of the impeller.

Description

technical field [0001] The invention relates to a cooling fan, in particular to a centrifugal cooling fan. Background technique [0002] Generally speaking, in order to improve the heat dissipation effect in the notebook computer, it is nothing more than to reduce the thermal resistance of the system or to increase the efficiency of the heat dissipation fan in the notebook computer. However, because the appearance of the notebook computer tends to be thinner and thinner and does not like too many cooling holes, the thermal resistance of the system is relatively large, which in turn reduces the air suction of the cooling fan, and makes it difficult for the air from the external environment to enter the system to generate the heat required for heat dissipation. Thermal convection. [0003] At the same time, the air gap between the blades of the existing centrifugal fan is relatively large, so it is difficult to control the airflow and easily cause backflow, resulting in insuf...

AI Technical Summary

Problems solved by technology

However, because the appearance of the notebook computer tends to be thinner and thinner and does not like too many cooling holes, the thermal resistance of the system is relatively large, which in turn reduces the air suction of the cooling fan, and makes it difficult for the air from the external environment to enter the system to generate the heat required for heat dissipation. heat convection

[0003] At the same time, the air gap between the blades of the existing centrifugal fan is large, so it is difficult to control the air flow and easily cause backflow, so that the wind pressure is insufficient, thereby affecting the heat dissipation efficiency

Furthermore, once the air inlet is increased to increase the air intake, if the fan blades do not provide a corresponding structure, it is easy to cause air leakage and the like.

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