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US 11,078,921 B2Granted
Blade, impeller and fan
AssigneeGree Electric Appliances, Inc. of Zhuhai
InventorsFeng Cao, Jianhuang Zou, Zhongjie Liu, Binhua Long, Hao Liu
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AssigneeGree Electric Appliances, Inc. of Zhuhai
InventorsFeng Cao, Jianhuang Zou, Zhongjie Liu, Binhua Long, Hao Liu
Estimating the term…
A blade, an impeller and a fan are provided. A trailing edge (12) of the blade (1) is provided with at least one concave arc segment (15). At least one end point of the at least one concave arc segment (15) is located between a radial outer edge (13) of the blade (1) and a radial inner edge (14) of the blade (1). The blade (1) is provided with at least one ridge structure protruding from a pressure surface (18) of the blade (1) toward a suction surface (17) of the blade (1). 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.
A blade, wherein 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, and the blade is provided with at least one ridge structure protruding from a pressure surface of the blade toward a suction surface thereof, each of the at least one ridge structure has a circular arc shape in a circumferential direction.
Dependencies are inferred from the claim text.