Crossflow fan

Abstract

Provided is a crossflow fan that can suppress loss of speed on an end of an impeller, leading to an increase in resistance to loss of speed. Therefore, a crossflow fan includes an impeller including a plurality of support members and a plurality of blades provided between adjacent support members, a motor provided on one end of a rotation axis of the impeller, a stabilizer spaced from an outer circumference of the impeller, the stabilizer being located along a direction of the rotation axis, and a convex portion provided, on a surface of the stabilizer facing the impeller, in such a way as to protrude toward the impeller, the convex portion being located along the direction of the rotation axis. In a rotation direction of the impeller, an end of the convex portion on a motor side is located downstream of a center of the convex portion.

1 . A crossflow fan comprising:
 an impeller comprising,
 a plurality of support members arranged at predetermined interval in a direction of a rotation axis, the support members being formed in the shape of a circular or ring-shaped flat plate, and 
 a plurality of blades provided between adjacent support members, located close to outer circumferences of the adjacent support members, and spaced apart in a circumferential direction; 
   a motor provided on one end of the rotation axis of the impeller;   a stabilizer spaced from an outer circumference of the impeller, the stabilizer being located along a direction of the rotation axis; and   a convex portion protruding toward the impeller on a surface of the stabilizer facing the impeller, the convex portion located along the direction of the rotation axis,   in a rotation direction of the impeller, an end of the convex portion on a motor side in the direction of the rotation axis being located downstream of a center of the convex portion in the direction of the rotation axis,   the end of the convex portion on the motor side in the direction of the rotation axis having a larger area of a surface facing the impeller than the center of the convex portion in the direction of the rotation axis.   
     
     
         2 . The crossflow fan according to  claim 1 , wherein, in the rotation direction of the impeller, an end of the convex portion on a side opposite to the motor in the direction of the rotation axis is located downstream of the center of the convex portion in the direction of the rotation axis. 
     
     
         3 . The crossflow fan according to  claim 1 , wherein the convex portion smoothly continues along the direction of the rotation axis. 
     
     
         4 . The crossflow fan according to  claim 2 , wherein the convex portion smoothly continues along the direction of the rotation axis. 
     
     
         5 . A crossflow fan comprising:
 an impeller comprising,
 a plurality of support members arranged at predetermined interval in a direction of a rotation axis, the support members being formed in the shape of a circular or ring-shaped flat plate, and 
 a plurality of blades provided between adjacent support members, located close to outer circumferences of the adjacent support members, and spaced apart in a circumferential direction; 
   a motor provided on one end of the rotation axis of the impeller;   a stabilizer spaced from an outer circumference of the impeller, the stabilizer being located along a direction of the rotation axis; and   a convex portion protruding toward the impeller on a surface of the stabilizer facing the impeller, the convex portion located along the direction of the rotation axis,   in a rotation direction of the impeller, an end of the convex portion on a motor side in the direction of the rotation axis being located downstream of a center of the convex portion in the direction of the rotation axis,   a surface of the convex portion facing the impeller is being formed such that a distance between the surface and the impeller gradually decreases as the surface extends from an upstream side to a downstream side in the rotation direction of the impeller.   
     
     
         6 . The crossflow fan according to  claim 5 , wherein, in the rotation direction of the impeller, an end of the convex portion on a side opposite to the motor in the direction of the rotation axis is located downstream of the center of the convex portion in the direction of the rotation axis. 
     
     
         7 . The crossflow fan according to  claim 5 , wherein the convex portion smoothly continues along the direction of the rotation axis. 
     
     
         8 . The crossflow fan according to  claim 6 , wherein the convex portion smoothly continues along the direction of the rotation axis.