Patent ID: 11955876
Assignee: MIDEA WELLING MOTOR TECHNOLOGY (SHANGHAI) CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H | IPC H

Claim 16:
17. The fan according to claim 1, wherein:
an inner wall surface of the wind hood comprises a first inner wall surface corresponding to the cover plate and a second inner wall surface corresponding to the first protrusion, the first inner wall surface protrudes from an outside of the wind hood to an axial direction of the wind hood, the second inner wall surface is recessed from an axis of the wind hood toward an outside direction of the wind hood, and along the air inlet direction, a diameter of the first inner wall surface and a diameter of the second inner wall surface gradually increase, and
the first inner wall surface, the second inner wall surface, an outer wall surface of the cover plate, an outer wall surface of the first protrusion, an outer wall surface of the inner ring arm, and an inner wall surface of the outer ring arm define the wind tunnel.