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:
Aug. 03, 2021
Filed:
Sep. 28, 2017
Gree Electric Appliances, Inc. of Zhuhai, Guangdong, CN;
Feng Cao, Guangdong, CN;
Jianhuang Zou, Guangdong, CN;
Zhongjie Liu, Guangdong, CN;
Binhua Long, Guangdong, CN;
Hao Liu, Guangdong, CN;
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong, CN;
Abstract
A blade, an impeller and a fan are provided. A trailing edge () of the blade () is provided with at least one concave arc segment (). At least one end point of the at least one concave arc segment () is located between a radial outer edge () of the blade () and a radial inner edge () of the blade (). The blade () is provided with at least one ridge structure protruding from a pressure surface () of the blade () toward a suction surface () of the blade (). The blade is provided with at least one concave arc segment at a trailing edge thereof on the basis of a bionics principle, and is further provided with a ridge structure, thus improving an airflow pattern at the trailing edge of the blade by means of changing a shape of the blade, and reducing noise accordingly.