1020030013767 is referenced by 1 patents.

PURPOSE: An axial flow fan is provided to significantly reduce noise of the axial flow fan by increasing a setting angle of a rotary blade from a middle portion to an end of the rotary blade and decreasing a camber ratio of the rotary blade from the middle portion to the end of the rotary blade. CONSTITUTION: An axial flow fan includes a hub coupled to a rotating shaft of a motor and a plurality of rotary blades integrally formed with an outer peripheral portion of the hub in order to blow air in an axial direction. A setting angle of the rotary blade increases from a middle portion to an end of the rotary blade. A camber ratio of the rotary blade decreases from the middle portion to the end of the rotary blade. The setting angle of the rotary blade is defined in a range between 10 to 30degrees.

Title
Axial flow fan in which setting angle of a rotary blade from middle portion to end of rotary blade is increased
Application Number
1020030013767
Publication Number
1020040078933
Application Date
March 5, 2003
Publication Date
September 14, 2004
Inventor
Park Se Yeong
Park Chang Ho
Cho Gyeong Seok
Assignee
Halla Climate Control
IPC
F04D 29/38