Fan

Abstract

A fan includes a motor portion having a shaft which rotates by taking a central axis as a center, an impeller portion configured at a side of the motor portion along the axial direction and connected with the shaft, and an upper cover portion configured at a radial outside of the impeller portion and in which the impeller portion is accommodated, the upper cover portion including an outside air guide wall portion located at a radial outside of the impeller portion, an inside air guide wall portion located at a radial inside of the outside air guide wall portion and having an air suction port which penetrates in an axial direction, and a plurality of connecting portions connected with the outside air guide wall portion and the inside air guide wall portion, characterized in that the impeller portion has a side wall portion which rotates by taking a central axis as a center, an upper wall portion located at a side of the side wall portion along the axial direction and extending along a radial direction, a plurality of wing portions extending along radially outside from the side wall portion, and a plurality of pressurizing wings configured at a side of the upper wall portion along the axial direction. With the structure of the fan, the air suction wind volume of the air suction port of the fan can be improved, and the exhaust efficiency can be increased.

What is claimed is: 
     
         1 . A fan, comprising:
 a motor portion having a shaft which rotates by taking a central axis as a center,   an impeller portion configured at a side of the motor portion along an axial direction and connected with the shaft, and   an upper cover portion configured at a radial outside of the impeller portion and in which the impeller portion is accommodated,   the upper cover portion comprising an outside air guide wall portion located at a radial outside of the impeller portion, an inside air guide wall portion located at a radial inside of the outside air guide wall portion and having an air suction port which penetrates in the axial direction, and a plurality of connecting portions connected with the outside air guide wall portion and the inside air guide wall portion,   characterized in that   the impeller portion has a side wall portion which rotates by taking a central axis as a center, an upper wall portion located at a side of the side wall portion along the axial direction and extending along a radial direction, a plurality of wing portions extending along radially outside from the side wall portion, and a plurality of pressurizing wings configured at a side of the upper wall portion along the axial direction.   
     
     
         2 . The fan according to  claim 1 , characterized in that a plurality of holes which penetrate in the axial direction are provided on the upper wall portion. 
     
     
         3 . The fan according to  claim 1 , characterized in that the number of the pressurizing wings is odd. 
     
     
         4 . The fan according to  claim 1 , characterized in that as observed in the axial direction, at least a part of each of the pressurizing wings is accommodated at an inside of the inside air guide wall portion. 
     
     
         5 . The fan according to  claim 1 , characterized in that as observed in the axial direction, at least a part of each of the pressurizing wings and the air suction port are opposed in an axial direction. 
     
     
         6 . The fan according to  claim 1 , characterized in that an end portion of the other side of the inside air guide wall portion along the axial direction and an end portion of a side of the side wall portion along the axial direction are opposed in a radial direction. 
     
     
         7 . The fan according to  claim 6 , characterized in that an end portion of the other side of the inside air guide wall portion along the axial direction, an end portion of a side of the side wall portion along the axial direction and at least a part of each of the wing portions are opposed in a radial direction. 
     
     
         8 . The fan according to  claim 1 , characterized in that the fan further comprises:
 a lower cover portion configured at the other side of the upper cover portion along the axial direction and connected with an end portion of the other side of the upper cover portion along the axial direction.   
     
     
         9 . The fan according to  claim 8 , characterized in that the lower cover portion comprises a lower wall portion extending in a circumferential direction by taking a central axis as a center, a tower portion located at a radial inside of the lower wall portion, and a plurality of static wing portions connected with the lower wall portion and the tower portion. 
     
     
         10 . The fan according to  claim 9 , characterized in that a side of the tower portion along the axial direction is provided with a substrate. 
     
     
         11 . The fan according to  claim 10 , characterized in that the tower portion and the substrate are fixed by welding.