Patent ID: 11864343
Assignee: LENOVO (BEIJING) LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  G | IPC F  G  H

Claim 0:
1. A heat dissipation fan, comprising:
a body including a fan air inlet surface, a central shaft driving surface located inside the fan air inlet surface, and a plurality of protrusion structures configured at spacings in a circumference direction of the central shaft driving surface; and
fan blades including first fan blades connected between the central shaft driving surface and the fan air inlet surface, and second fan blades connected between the protrusion structure and the fan air inlet surface;
wherein a fan air inlet angle is formed between each fan blade and the central shaft driving surface, and the plurality of protrusion structures are configured to vary the fan air inlet angle to control a flow field of an airflow entering the fan air inlet angle.