Patent · US Active

Centrifugal fan blade assembly and centrifugal fan

US11204040B2 · kind B2 · utility

0Cited by

4References

10Claims

0Family size

Assignee

GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI · CN

Inventors

Yasong TIAN · Tangxia, CN
Jianjian Li · Tangxia, CN
Jun Xiong · Santa Clara, US
Junhong Wu · Longbeilingcun, CN
Dawei Li · Tangxia, CN

Key dates

Filing date	Oct 13, 2017
Grant date	Dec 21, 2021
Priority date	—
Expiry date	Oct 13, 2037

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05D2250/294
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Disclosed are a centrifugal fan blade assembly and a centrifugal fan, comprising a plurality of blades, a blade leading edge of at least some of the blades being provided with an interference groove, the interference groove extending in a width direction of the blade. By providing the interference groove extending in the width direction of the blade on the blade leading edge, when the fan blade assembly is running, the interference groove changes noise frequency, thereby preventing the blade leading edge from producing a relatively large broadband noise after being impacted by a high speed air flow, thus effectively reducing noise.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.