Warm air blower

Abstract

The present disclosure provides a warm air blower. The warm air blower comprises a shell, a support, a cross-flow wind wheel and a volute tongue, wherein the cross-flow wind wheel and the volute tongue are arranged in the shell, the cross-flow wind wheel is located between the volute tongue and the shell, and the support is connected with the shell; and the cross-flow wind wheel comprises two oppositely arranged fixed plates and a plurality of blades connected between the two fixed plates, the cross section of the blade is arc-shaped, and the range of the arc-shaped chord length is 9-10 mm. According to the technical scheme, the frequency concentration of noise is avoided, the noise intensity is reduced, and the use experience of a user is improved.

What is claimed is: 
     
         1 . A warm air blower, comprising a shell ( 1 ), a support ( 2 ), a cross-flow wind wheel ( 3 ) and a volute tongue ( 4 ), wherein the cross-flow wind wheel ( 3 ) and the volute tongue ( 4 ) are arranged in the shell ( 2 ), the cross-flow wind wheel ( 3 ) is located between the volute tongue ( 4 ) and the shell ( 1 ), and the support ( 2 ) is connected with the shell ( 1 ); and
 the cross-flow wind wheel ( 3 ) comprises two oppositely arranged fixed plates ( 31 ) and a plurality of blades ( 32 ) connected between the two fixed plates ( 31 ), the cross section of the blade ( 32 ) is arc-shaped, and the range of the arc-shaped chord length ( 321 ) is 9-10 mm.   
     
     
         2 . The warm air blower according to  claim 1 , wherein the fixed plate ( 31 ) is circular, the ends of the blades ( 32 ) penetrate through the fixed plates ( 31 ) and extend outwards, and the blades ( 32 ) are evenly distributed along the circumferential outer edges of the fixed plates ( 31 ) at intervals. 
     
     
         3 . The warm air blower according to  claim 1 , wherein a plurality of reinforcing plates ( 33 ) are further arranged between the two fixed plates ( 31 ) at intervals, and the blades ( 32 ) penetrate through the reinforcing plates ( 33 ) and extend outwards. 
     
     
         4 . The warm air blower according to  claim 1 , wherein the blades ( 32 ) are arranged between the two fixed plates ( 31 ) in a rightward inclined mode along the axis direction of the cross-flow wind wheel ( 3 ), and included angles theta are formed between the blades ( 32 ) and the fixed plates ( 31 ) and range from 80° to 90°. 
     
     
         5 . The warm air blower according to  claim 1 , wherein one end of the cross-flow wind wheel ( 3 ) is provided with a rotating shaft ( 34 ), the shell ( 1 ) is provided with a first bearing sleeve ( 11 ), and the rotating shaft ( 34 ) is accommodated in the first bearing sleeve ( 11 ). 
     
     
         6 . The warm air blower according to  claim 5 , wherein the end, away from the rotating shaft ( 34 ), of the cross-flow wind wheel ( 3 ) is provided with a second bearing sleeve ( 35 ), the warm air blower further comprises a motor ( 5 ) arranged on the shell ( 1 ), and the second bearing sleeve ( 35 ) is arranged on an output shaft of the motor ( 5 ) in a sleeving mode. 
     
     
         7 . The warm air blower according to  claim 1 , wherein the warm air blower further comprises a heating device ( 21 ) arranged in the support ( 2 ).