Diffusion Type Combination Fan

Abstract

A combination fan includes an inner impeller unit, an outer impeller unit and a driving unit. The inner impeller unit is rotated by the driving unit and includes a rotation member, a ring-shaped member and a plurality of inner blades. The outer impeller unit is rotatable in concert with the inner impeller unit and includes a connecting member, an outer wall and a plurality of outer blades. The driving unit includes a propeller shaft connected with the rotation member to rotate the inner impeller unit, and a drive mechanism connected with the propeller shaft to rotate the propeller shaft. Thus, the inner impeller unit and the outer impeller unit are rotated by the driving unit to guide an air flow in different directions simultaneously.

1 . A combination fan, comprising:
 an inner impeller unit;   an outer impeller unit connected with the inner impeller unit; and   a driving unit connected with the inner impeller unit;   wherein the inner impeller unit is rotated by the driving unit;   the inner impeller unit includes:   a rotation member connected with and driven by the driving unit;   a ring-shaped member surrounding the rotation member; and   a plurality of inner blades each disposed between the rotation member and the ring-shaped member and each having a first end connected with the rotation member and a second end connected with the ring-shaped member;   the outer impeller unit is rotatable in concert with the inner impeller unit;   the outer impeller unit includes:   a connecting member connected with the ring-shaped member of the inner impeller unit;   an outer wall surrounding the connecting member; and   a plurality of outer blades each disposed between the connecting member and the outer wall and each having a first end connected with the connecting member and a second end connected with the outer wall;   the connecting member of the outer impeller unit is inclined relative to the ring-shaped member of the inner impeller unit;   a predetermined angle is defined between the connecting member of the outer impeller unit and the ring-shaped member of the inner impeller unit;   the driving unit includes:
 a propeller shaft connected with the rotation member of the inner impeller unit to rotate the rotation member of the inner impeller unit; and 
 a drive mechanism connected with the propeller shaft to drive and rotate the propeller shaft; 
 the inner impeller unit and the outer impeller unit are rotated by the driving unit to guide an air flow in different directions. 
   
     
     
         2 . The combination fan of  claim 1 , wherein the rotation member, the inner blades and the ring-shaped member of the inner impeller unit, and the connecting member, the outer blades and the outer wall of the outer impeller unit are formed integrally;
 the inner impeller unit and the outer impeller unit are combined together integrally and are rotated by the driving unit simultaneously;   each of the outer blades of the outer impeller unit is inclined relative to each of the inner blades of the inner impeller unit;   a predetermined angle is defined between each of the outer blades of the outer impeller unit and each of the inner blades of the inner impeller unit;   the propeller shaft of the driving unit is extended through the outer blades of the outer impeller unit;   the propeller shaft of the driving unit has a first end connected with the drive mechanism and a second end secured in the rotation member of the inner impeller unit.   
     
     
         3 . The combination fan of  claim 1 , wherein
 the combination fan further comprises a functional device mounted on the drive mechanism of the driving unit;   the functional device is a chill-enabling chip.   
     
     
         4 . The combination fan of  claim 1 , wherein
 the combination fan further comprises a functional device mounted on the drive mechanism of the driving unit;   the functional device is an atomizing processor.   
     
     
         5 . The combination fan of  claim 1 , wherein
 the combination fan further comprises a functional device mounted on the drive mechanism of the driving unit;   the functional device is a heater.   
     
     
         6 . The combination fan of  claim 1 , wherein
 the combination fan further comprises a functional device mounted on the drive mechanism of the driving unit;   the functional device is an ultrasonic generator.   
     
     
         7 . The combination fan of  claim 1 , wherein
 the combination fan further comprises a functional device mounted on the drive mechanism of the driving unit;   the functional device is a ozone generator.   
     
     
         8 . The combination fan of  claim 1 , wherein the combination fan further comprises a net-shaped cover mounted on the drive mechanism of the driving unit to cover the inner impeller unit and the outer impeller unit.