The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 2021
Filed:
Oct. 13, 2017
Gree Electric Appliances, Inc. of Zhuhai, Zhuhai, CN;
Yasong Tian, Guangdong, CN;
Jianjian Li, Guangdong, CN;
Jun Xiong, Guangdong, CN;
Junhong Wu, Guangdong, CN;
Dawei Li, Guangdong, CN;
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong, CN;
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.