Motor assembly for vacuum cleaner

Abstract

Disclosed herein is a motor assembly for a vacuum cleaner, the motor assembly including: an inlet introducing air therethrough; a motor; an impeller installed on a shaft of the motor and including a plurality of blades disposed at predetermined intervals between a pair of plates facing each other so that it rotates by the motor to suck the air; a diffuser disposed at an outer side of a discharge hole formed at an edge of the impeller; a first fan including a plurality of blade parts disposed at predetermined intervals while having the shaft as a concentric axis and disposed beneath the diffuser; and an outlet discharging the air to the outside.

What is claimed is: 
     
         1 . A motor assembly for a vacuum cleaner, the motor assembly comprising:
 an inlet introducing air therethrough;   a motor;   an impeller installed on a shaft of the motor and including a plurality of blades disposed at predetermined intervals between a pair of plates facing each other so that it rotates by the motor to suck the air;   a diffuser disposed at an outer side of a discharge hole formed at an edge of the impeller;   to a first fan including a plurality of blade parts disposed at predetermined intervals while having the shaft as a concentric axis and disposed beneath the diffuser; and   an outlet discharging the air to the outside.   
     
     
         2 . The motor assembly as set forth in  claim 1 , wherein the blade of the impeller and the blade part of the first fan have the same pattern. 
     
     
         3 . The motor assembly as set forth in  claim 1 , wherein the motor includes a stator and a rotor, and a position of the rotor is fixed onto the shaft using upper and lower stoppers. 
     
     
         4 . The motor assembly as set forth in  claim 1 , wherein the first fan is disposed on an outer peripheral surface of an upper stopper. 
     
     
         5 . The motor assembly as set forth in  claim 1 , wherein the first fan includes the plurality of blade parts disposed at predetermined intervals between a pair of upper and lower plates facing each other while having the shaft as the concentric axis. 
     
     
         6 . The motor assembly as set forth in  claim 1 , wherein an upper plate of the first fan includes an opening part formed at the center thereof. 
     
     
         7 . A motor assembly for a vacuum cleaner, the motor assembly comprising:
 an inlet introducing air therethrough;   a motor;   an impeller installed on a shaft of the motor and including a plurality of blades disposed at predetermined intervals between a pair of plates facing each other so that it rotates by the motor to suck the air;   a diffuser disposed at an outer side of a discharge hole formed at an edge of the impeller;   a second fan including a plurality of blade parts disposed at predetermined intervals while having the shaft as a concentric axis and disposed beneath the motor; and   an outlet discharging the air to the outside.   
     
     
         8 . The motor assembly as set forth in  claim 7 , further comprising a first fan including a plurality of blade parts disposed at predetermined intervals while having the shaft as the concentric axis and disposed beneath the diffuser. 
     
     
         9 . The motor assembly as set forth in  claim 7 , wherein the blade part of the second fan has the same pattern as that of the blade of the impeller. 
     
     
         10 . The motor assembly as set forth in  claim 7 , wherein the blade part of the second fan has the same pattern as that of a blade part of a first fan. 
     
     
         11 . The motor assembly as set forth in  claim 7 , wherein the motor includes a stator and a rotor, and a position of the rotor is fixed onto the shaft using upper and lower stoppers. 
     
     
         12 . The motor assembly as set forth in  claim 7 , wherein the second fan is disposed on an outer peripheral surface of a lower stopper. 
     
     
         13 . The motor assembly as set forth in  claim 8 , wherein the first fan is disposed on an outer peripheral surface of an upper stopper. 
     
     
         14 . The motor assembly as set forth in  claim 7 , wherein the second fan is disposed at a height equal to or higher than that of the outlet. 
     
     
         15 . The motor assembly as set forth in  claim 7 , wherein the first fan includes the plurality of blade parts disposed at predetermined intervals between a pair of upper and lower plates facing each other while having the shaft as the concentric axis,
 the second fan includes the plurality of blade parts disposed at predetermined intervals between a pair of upper and lower plates facing each other while having the shaft as the concentric axis, and   each of upper plates of the first fan and the second fan includes an opening part formed at the center thereof.