Vacuum cleaner impeller and motor assembly

Abstract

An impeller reduces peak noise in the frequency range of 8˜10 khz and is constructed, in disclosed embodiments, with a lower plate in a shape of a disk, an upper plate spaced apart from the lower plate by a predetermined distance and having a diameter corresponding with a diameter of the lower plate and a central air inlet, and a plurality of air guide members disposed radially between the lower plate and the upper plate having their outside corners chamfered.

1 . An impeller for a vacuum cleaner comprising: 
 a lower plate in a shape of a disk;    an upper plate spaced apart from the lower plate by a predetermined distance, the upper plate having a diameter corresponding with a diameter of the lower plate and an air inlet in the center thereof; and    a plurality of air guide members disposed radially between the lower plate and the upper plate, the air guide members chamfered at both outside ends thereof    
   
   
       2 . The impeller for the vacuum cleaner of  claim 1 , wherein a dimension of the chamfered corner satisfies the formula 1.5 mm≦B≦C/2, where B is the widthwise dimension of the chamfered corner, and C is the width of the air guide member.  
   
   
       3 . The impeller for the vacuum cleaner of  claim 1 , wherein a lengthwise dimension of the chamfered corner is between approximately 1.5 mm and 3 mm.  
   
   
       4 . An impeller for a vacuum cleaner comprising: 
 a lower plate in a shape of a disk;    a plurality of air guide members disposed radially on the lower plate, the plurality of air guide members having chamfered corners at outside ends thereof; and    an upper plate disposed on the plurality of air guide members, the upper plate having a central air inlet and a diameter corresponding to a lengthwise beginning point of the chamfered corner of the air guide member.    
   
   
       5 . The impeller for the vacuum cleaner of  claim 4 , wherein a dimension of the chamfered corners satisfies the formula 1.5 mm≦B≦C/2, where B is the widthwise dimension of the chamfered corner, and C is the width of the air guide member.  
   
   
       6 . The impeller for the vacuum cleaner of  claim 4 , wherein a lengthwise dimension of the chamfered corners is between approximately 1.5 mm and 3 mm.  
   
   
       7 . A motor assembly for a vacuum cleaner comprising; 
 a motor;    an impeller comprising, 
 a lower plate disposed at a motor shaft of the motor, the lower plate in a shape of a disk,  
 an upper plate spaced apart from the lower plate by a predetermined distance, the upper plate having a central air inlet and a diameter corresponding with a diameter of the lower plate, and  
 a plurality of air guide members disposed radially between the lower plate and the upper plate, the air guide members having both outside corners chamfered; and  
   a diffuser disposed at an upper portion of the motor, the diffuser guiding intake air from the impeller toward the motor.    
   
   
       8 . The motor assembly for the vacuum cleaner of  claim 7 , wherein a dimension of the chamfered corners satisfies the formula 1.5 mm≦B≦C/2 where, B is the widthwise dimension of the chamfered corner, and C is the width of air guide member.  
   
   
       9 . The motor assembly for the vacuum cleaner of  claim 7 , wherein a lengthwise length of the chamfered corners is approximately between 1.5 mm and 3 mm.  
   
   
       10 . A motor assembly for a vacuum cleaner comprising; 
 a motor;    an impeller comprising, 
 a lower plate in a shape of a disk,  
 a plurality of air guide members disposed radially on the lower plate, the plurality of air guide members chamfered at both outside corners thereof, and  
 an upper plate disposed on the plurality of air guide members, the upper plate having a diameter corresponding with a lengthwise beginning point of the chamfered corner of the air guide member and a central air inlet thereof; and  
   a diffuser disposed at an upper portion of the motor, the diffuser guiding intake air from the impeller toward the motor.    
   
   
       11 . The motor assembly for the vacuum cleaner of  claim 10 , wherein a dimension of the chamfered corners satisfies the formula  1 . 5  mm≦B≦C/2 where, B is the widthwise dimension of the chamfered corner, and C is the width of the air guide member.  
   
   
       12 . The motor assembly for the vacuum cleaner of  claim 10 , wherein a lengthwise dimension of the chamfered corner is between approximately 1.5 mm and 3 mm.