Airflow generating apparatus

Abstract

An airflow generating apparatus is provided. Fan blades are disposed around a hub, and one side of a fan blade is partially fixed on the peripheral of the hub, and another portion not fixed on the peripheral side of the hub is a free portion swinging with airflow. Therefore, the airflow generating apparatus employing the fan blades can adjust the swaying angle in accordance with the variation of different flow fields, so as to maintain a smooth airflow.

1 . An airflow generating apparatus, comprising:
 a hub;   a motor, driving the hub to rotate; and   a plurality of fan blades, wherein each of the fan blades comprises a fixed portion and a free portion connected to the fixed portion, the fixed portion on a side facing the hub is fixed on the hub, so that when the hub rotates, the fixed portion generates an axial airflow, and the axial airflow pushes the free portion to swing.   
   
   
       2 . The airflow generating apparatus as claimed in  claim 1 , wherein the fixed portion of each fan blade has a plurality of supporting ribs to reinforce the strength of the fixed portion. 
   
   
       3 . The airflow generating apparatus as claimed in  claim 1 , wherein the fixed portion is made of a hard material and the free portion is made of a flexible material. 
   
   
       4 . The airflow generating apparatus as claimed in  claim 1 , further comprising:
 a frame, for accommodating the hub and the fan blade; and   a plurality of baffles, wherein each of the baffles comprises a fixed portion and a free portion connected to the fixed portion, one side of the fixed portion is fixed on the peripheral side of the frame, and the free portion swings under the push of the axial airflow.   
   
   
       5 . The airflow generating apparatus as claimed in  claim 4 , wherein the fixed portion has a plurality of supporting ribs on one side surface thereof to reinforce the strength of the fixed portion. 
   
   
       6 . The airflow generating apparatus as claimed in  claim 4 , wherein the fixed portion is made of a hard material, and the free portion is made of a flexible material. 
   
   
       7 . The airflow generating apparatus as claimed in  claim 4 , wherein the frame further comprises a connecting element disposed in the middle of the frame, so that one end of the baffles is connected to the frame, and the other end of the baffles is connected to the connecting element. 
   
   
       8 . The airflow generating apparatus as claimed in  claim 1 , further comprising:
 a frame, for accommodating the hub and the fan blade; and   a plurality of baffles, wherein each of the baffles is fixed on the peripheral side of the frame and guides the axial airflow.   
   
   
       9 . An airflow generating apparatus, comprising:
 a frame;   a hub;   a motor, disposed in the frame, for driving the hub to rotate;   a plurality of fan blades, connected to the peripheral side of the hub, so that when the hub rotates, the fan blades generate an axial airflow; and   a plurality of baffles, wherein each of the baffles comprises a fixed portion and a free portion connected to the fixed portion, one side of the fixed portion is fixed on the peripheral side of the frame, and the free portion swings under the pushed of the axial airflow.   
   
   
       10 . The airflow generating apparatus as claimed in  claim 9 , wherein the fixed portion has a plurality of supporting ribs on one side surface thereof to reinforce the strength of the fixed portion. 
   
   
       11 . The airflow generating apparatus as claimed in  claim 9 , wherein the fixed portion is made of a hard material, and the free portion is made of a flexible material. 
   
   
       12 . The airflow generating apparatus as claimed in  claim 9 , wherein the frame further comprises a connecting element disposed in the middle of the frame, so that one end of the baffles is connected to the frame, and the other end of the baffles is connected to the connecting element.