Impeller for electric blower

Abstract

Embodiments of the invention provide an impeller for an electric blower. The impeller includes a hub and a shroud disposed to correspond to the hub so that an internal space and an outlet are formed between the hub and the shroud and including an inlet formed therein to introduce air and a disk part formed from the inlet toward an outside. The impeller further includes a blade disposed in the internal space between the shroud and the hub, whereby a distance from a leading edge of the blade positioned at the inlet side to the center of the inlet is the same as a minimum distance from a rim of the inlet to the center of the inlet.

What is claimed is: 
     
         1 . An impeller for an electric blower, comprising:
 a hub;   a shroud disposed to correspond to the hub so that an internal space and an outlet are formed between the hub and the shroud and including an inlet formed therein to introduce air and a disk part formed from the inlet toward an outside; and   a blade disposed in the internal space between the shroud and the hub,   wherein a distance from a leading edge of the blade positioned at the inlet side to the center of the inlet is the same as a minimum distance from a rim of the inlet to the center of the inlet.   
     
     
         2 . The impeller for the electric blower as set forth in  claim 1 , wherein a ratio between a height of the leading edge of the blade positioned at the inlet side and a height of a trailing edge of the blade positioned at the outlet side is 2.4 to 2.6. 
     
     
         3 . The impeller for the electric blower as set forth in  claim 1 , wherein a ratio between a diameter of the outlet and a diameter of the inlet is 2.2 to 2.4. 
     
     
         4 . The impeller for the electric blower as set forth in  claim 1 , wherein a ratio between an area formed by rotating the leading edge of the blade based on the center of the inlet by 360 degrees and an area of the inlet is 1.4 to 1.5. 
     
     
         5 . An impeller for an electric blower, comprising:
 a hub;   a shroud disposed to correspond to the hub so that an internal space and an outlet are formed between the hub and the shroud and including an inlet formed therein to introduce air and a disk part rounded in a shape of an oval curved line from the inlet toward an outside; and   a blade disposed in the internal space between the shroud and the hub.   
     
     
         6 . The impeller for the electric blower as set forth in  claim 5 , wherein a center of a curvature of the disk part is formed to be the same as a height at which a leading edge of the blade is connected to the shroud. 
     
     
         7 . The impeller for the electric blower as set forth in  claim 5 , wherein a ratio between a diameter of the outlet and a diameter of the inlet is 2.2 to 2.4. 
     
     
         8 . The impeller for the electric blower as set forth in  claim 5 , wherein a ratio between a height of the leading edge of the blade positioned at the inlet side and a height of a trailing edge of the blade positioned at the outlet side is 2.4 to 2.6. 
     
     
         9 . The impeller for the electric blower as set forth in  claim 5 , wherein a ratio between an area formed by rotating the leading edge of the blade based on the center of the inlet by 360 degrees and an area of the inlet is 1.4 to 1.5. 
     
     
         10 . The impeller for the electric blower as set forth in  claim 5 , wherein a distance from a leading edge of the blade positioned at the inlet side to the center of the inlet is the same as a minimum distance from a rim of the inlet to the center of the inlet. 
     
     
         11 . An impeller for an electric blower, comprising:
 a hub;   a shroud disposed to correspond to the hub so that an internal space and an outlet are formed between the hub and the shroud and including an inlet formed therein to introduce air and a disk part formed from the inlet toward an outside; and   a blade disposed in the internal space between the shroud and the hub,   wherein a distance from a leading edge of the blade positioned at the inlet side to the center of the inlet is smaller than a distance from an outer diameter of the inlet to the center of the inlet.   
     
     
         12 . The impeller for the electric blower as set forth in  claim 11 , wherein an upper surface of the blade that the air first contacts is inclined at an angle of 0 to 5 degrees in upward and downward directions based on the inlet. 
     
     
         13 . The impeller for the electric blower as set forth in  claim 11 , wherein a straight line formed at the leading edge of the blade toward the shroud is inclined at an angle of 0 to 5 degrees in forward and backward directions. 
     
     
         14 . The impeller for the electric blower as set forth in  claim 11 , wherein a ratio between a diameter of the outlet and a diameter of the inlet is 2.2 to 2.4. 
     
     
         15 . The impeller for the electric blower as set forth in  claim 11 , wherein a ratio between a height of the leading edge of the blade positioned at the inlet side and a height of a trailing edge of the blade positioned at the outlet side is 2.4 to 2.6. 
     
     
         16 . The impeller for the electric blower as set forth in  claim 11 , wherein a ratio between an area formed by rotating the leading edge of the blade based on the center of the inlet by 360 degrees and an area of the inlet is 1.4 to 1.5. 
     
     
         17 . The impeller for the electric blower as set forth in  claim 11 , wherein the disk part is rounded in a shape of an oval curved line from the inlet toward an outside. 
     
     
         18 . The impeller for the electric blower as set forth in  claim 17 , wherein a center of a curvature of the disk part is formed to be the same as a height at which a leading edge of the blade is connected to the shroud.