Fan system

Abstract

A fan system in combination with a DC brushless motor. The DC brushless motor includes: a shaft, a base, a stator assembly, a rotor assembly, a control box including a second cavity, and a circuit board. The fan system includes: a blower housing, a wind wheel, a first mounting bracket, and a second mounting bracket. The first mounting bracket is arranged at a first air inlet. The outer side of the first mounting bracket is connected to the upper end surface. The inner side of the first mounting bracket is provided with a first bearing, and the other end of the shaft is disposed on the first bearing. The second mounting bracket is arranged at a second air inlet. The outer side of the second mounting bracket is connected to the lower end surface.

The invention claimed is: 
     
         1 . A fan system in combination with a DC brushless motor ( 2 ), the DC brushless motor ( 2 ) comprising: a shaft ( 21 ), a base ( 22 ), a stator assembly ( 23 ), a rotor assembly ( 24 ), a control box ( 25 ) comprising a second cavity, and a circuit board ( 26 ); the fan system comprising:
 a) a blower housing ( 1 ), the blower housing ( 1 ) comprising: a first cavity ( 11 ), an upper end surface ( 12 ), a lower end surface ( 13 ), and an air outlet ( 16 );   b) a wind wheel ( 3 ), the wind wheel ( 3 ) comprising a connecting plate ( 31 );   c) a first mounting bracket ( 4 ), the first mounting bracket ( 4 ) comprising: an outer side, an inner side; and   d) a second mounting bracket ( 5 ), the second mounting bracket ( 5 ) comprising: an outer side, and an inner side;   
       wherein
 the first cavity ( 11 ) is arranged inside the blower housing ( 1 ); a first air inlet ( 14 ) is disposed on the upper end surface ( 12 ) of the blower housing ( 1 ); a second air inlet ( 15 ) is disposed on the lower end surface ( 13 ) of the blower housing ( 1 ); the first air inlet ( 14 ) and the second air inlet ( 15 ) are communicated with the cavity ( 11 ); the air outlet ( 16 ) is communicated with the cavity ( 11 ); 
 the circuit board ( 26 ) is arranged in the second cavity of the control box ( 25 ); the stator assembly ( 23 ) is disposed on the base ( 22 ); the rotor assembly ( 24 ) is disposed on a middle part of the shaft ( 21 ); the stator assembly ( 23 ) is arranged inside the rotor assembly ( 24 ); the base ( 22 ) is provided with a second bearing ( 7 ); one end of the shaft ( 21 ) is disposed on the second bearing ( 7 ); 
 the connecting plate ( 31 ) in disposed on a middle part of the wind wheel ( 3 ) outside the rotor assembly ( 24 ); 
 the first mounting bracket ( 4 ) is arranged at the first air inlet ( 14 ); the outer side of the first mounting bracket ( 4 ) is connected to the upper end surface ( 12 ); the inner side of the first mounting bracket ( 4 ) is provided with a first bearing ( 6 ); the other end of the shaft ( 21 ) is disposed on the first bearing ( 6 ); and 
 the second mounting bracket ( 5 ) is arranged at the second air inlet ( 15 ); the outer side of the second mounting bracket ( 5 ) is connected to the lower end surface ( 13 ); the inner side of the second mounting bracket ( 5 ) is connected to the control box ( 25 ). 
 
     
     
         2 . The fan system of  claim 1 , wherein
 the base ( 22 ) and the control box ( 25 ) are arranged together and positioned in the first cavity ( 11 ); and   the inner side of the second mounting bracket ( 5 ) is connected to the control box ( 25 ).   
     
     
         3 . The fan system of  claim 1 , wherein
 the control box ( 25 ) is arranged outside the blower housing ( 1 );   the circuit board ( 26 ) is arranged inside the control box ( 25 ) and is in electric connection with the stator assembly ( 23 ) in the first cavity ( 11 ) through a wire; and   the inner side of the second mounting bracket ( 5 ) is connected to a bottom of the base ( 22 ).   
     
     
         4 . The fan system of  claim 1 , wherein
 a flange plate ( 241 ) is fixed outside the rotor assembly ( 24 );   a center hole is disposed on the connecting plate ( 31 ) in the middle of the wind wheel ( 3 ); the rotor assembly ( 24 ) is disposed in the center hole; and   the flange plate ( 241 ) is connected to the connecting plate ( 31 ) via a screw.   
     
     
         5 . The fan system of  claim 2 , wherein
 a flange plate ( 241 ) is fixed outside the rotor assembly ( 24 );   a center hole is disposed on the connecting plate ( 31 ) in the middle of the wind wheel ( 3 ); the rotor assembly ( 24 ) is disposed in the center hole; and   the flange plate ( 241 ) is connected to the connecting plate ( 31 ) via a screw.   
     
     
         6 . The fan system of  claim 3 , wherein
 a flange plate ( 241 ) is fixed outside the rotor assembly ( 24 );   a center hole is disposed on the connecting plate ( 31 ) in the middle of the wind wheel ( 3 ); the rotor assembly ( 24 ) is disposed in the center hole; and   the flange plate ( 241 ) is connected to the connecting plate ( 31 ) via a screw.   
     
     
         7 . The fan system of  claim 4 , wherein
 the first mounting bracket ( 4 ) comprises a plurality of first mounting legs ( 41 );   the first mounting legs ( 41 ) are distributed around the first air inlet ( 14 );   one end of each of the first mounting legs ( 41 ) are connected to the upper end surface ( 12 );   the other end of each of the first mounting legs ( 41 ) are connected to each other to form a third cavity ( 42 ); and   the first bearing ( 6 ) is arranged inside the third cavity ( 42 ).   
     
     
         8 . The fan system of  claim 5 , wherein
 the first mounting bracket ( 4 ) comprises a plurality of first mounting legs ( 41 );   the first mounting legs ( 41 ) are distributed around the first air inlet ( 14 );   one end of each of the first mounting legs ( 41 ) are connected to the upper end surface ( 12 );   the other end of each of the first mounting legs ( 41 ) are connected to each other to form a third cavity ( 42 ); and   the first bearing ( 6 ) is arranged inside the third cavity ( 42 ).   
     
     
         9 . The fan system of  claim 6 , wherein
 the first mounting bracket ( 4 ) comprises a plurality of first mounting legs ( 41 );   the first mounting legs ( 41 ) are distributed around the first air inlet ( 14 );   one end of each of the first mounting legs ( 41 ) are connected to the upper end surface ( 12 );   the other end of each of the first mounting legs ( 41 ) are connected to each other to form a third cavity ( 42 ); and   the first bearing ( 6 ) is arranged inside the third cavity ( 42 ).   
     
     
         10 . The fan system of  claim 4 , wherein
 the second mounting bracket ( 5 ) comprises a plurality of second mounting legs ( 51 );   the second mounting legs ( 51 ) are distributed around the second air inlet ( 15 );   one end of each of the second mounting legs ( 51 ) is connected to the lower end surface ( 13 );   the other end of each of the second mounting legs ( 51 ) are connected to an erection loop ( 52 ); and   the erection loop ( 52 ) is attached to the control box ( 25 ) and is fixed on the control box ( 25 ) by a screw.   
     
     
         11 . The fan system of  claim 5 , wherein
 the second mounting bracket ( 5 ) comprises a plurality of second mounting legs ( 51 );   the second mounting legs ( 51 ) are distributed around the second air inlet ( 15 );   one end of each of the second mounting legs ( 51 ) is connected to the lower end surface ( 13 );   the other end of each of the second mounting legs ( 51 ) are connected to an erection loop ( 52 ); and   the erection loop ( 52 ) is attached to the control box ( 25 ) and is fixed on the control box ( 25 ) by a screw.   
     
     
         12 . The fan system of  claim 6 , wherein
 the second mounting bracket ( 5 ) comprises a plurality of second mounting legs ( 51 );   the second mounting legs ( 51 ) are distributed around the second air inlet ( 15 );   one end of each of the second mounting legs ( 51 ) is connected to the lower end surface ( 13 );   the other end of each of the second mounting legs ( 51 ) are connected to an erection loop ( 52 ); and   the erection loop ( 52 ) is attached to the control box ( 25 ) and is fixed on the control box ( 25 ) by a screw.   
     
     
         13 . The fan system of  claim 7 , wherein
 an end part of the first mounting leg ( 41 ) is provided with a strip groove ( 43 ); and   a screw passes through the strip groove ( 43 ) and fixes the first mounting leg ( 41 ) on the blower housing ( 1 ).   
     
     
         14 . The fan system of  claim 8 , wherein
 an end part of the first mounting leg ( 41 ) is provided with a strip groove ( 43 ); and   a screw passes through the strip groove ( 43 ) and fixes the first mounting leg ( 41 ) on the blower housing ( 1 ).   
     
     
         15 . The fan system of  claim 9 , wherein
 an end part of the first mounting leg ( 41 ) is provided with a strip groove ( 43 ); and   a screw passes through the strip groove ( 43 ) and fixes the first mounting leg ( 41 ) on the blower housing ( 1 ).