Patent ID: 11898575
Assignee: QINGDAO HAIER DRUM WASHING MACHINE CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  D | IPC D  F

Claim 4:
5. A housing of a centrifugal fan, comprising:
an air duct of the housing provided with a layering structure,
wherein the layering structure is arranged to be able to divide at least a part of the air duct into at least two wind layers, and a width of the wind layer close to a strong wind end is larger than a width of the wind layer close to a weak wind end;
wherein the layering structure is arranged close to an outlet end of the air duct;
wherein the layering structure is a layering platform attached to or formed on an inner wall of the housing, and the layering platform comprises at least two step portions so as to divide the air duct into at least three wind layers;
wherein a windward end of the layering platform has a smooth transition with the inner wall of the housing; and
wherein a cross-sectional width of each of the step portions of the layering platform gradually increases in a direction in which a gas flows from the windward end toward an outlet end of the air duct.