Motor assembly and vacuum cleaner having the same

Abstract

A motor assembly includes: a motor including at least a motor body and a motor blade portion; at least one inner motor casing configured to enclose at least a part of the motor; and at least one outer motor casing configured to enclose at least a part of the at least one inner motor casing, wherein air in the motor is caused to change direction when passing along at least one of the at least one inner motor casing and the at least one outer motor casing.

1 . A motor assembly, comprising: 
 a motor including at least a motor body and a motor blade portion;    at least one inner motor casing configured to enclose at least a part of the motor; and    at least one outer motor casing configured to enclose at least a part of the at least one inner motor casing,    wherein air at the motor is caused to change direction when passing along at least one of the at least one inner motor casing and the at least one outer motor casing.    
   
   
       2 . The motor assembly as claimed in  claim 1 , wherein the air is caused to change direction by substantially 90° to substantially 180° when flowing from a first air passage formed between the motor and the at least one inner motor casing to a second air passage formed between the at least one inner motor casing and the at least one outer motor casing.  
   
   
       3 . The motor assembly as claimed in  claim 1 , wherein the at least one inner motor casing is configured to enclose the motor body of the motor, and the at least one outer motor casing is configured to enclose the motor body and the motor blade portion.  
   
   
       4 . The motor assembly as claimed in  claim 3 , wherein the at least one inner motor casing and the at least one outer motor casing each include a plurality of air passing holes to allow air escaping from the motor to pass therethrough.  
   
   
       5 . The motor assembly as claimed in  claim 4 , wherein the plurality of air passing holes include at least one first air passing hole defined at a circumference of the at least one inner motor casing and at least one second air passing hole defined at the at least one outer motor casing.  
   
   
       6 . The motor assembly as claimed in  claim 5 , wherein at least one second air passing hole is defined at a rear of the at least one outer motor casing,  
   
   
       7 . The motor assembly as claimed in  claim 6 , wherein the at least one first passing hole is defined around the circumference.  
   
   
       8 . The motor assembly as claimed in  claim 5 , wherein the at least one first passing hole is defined around the circumference.  
   
   
       9 . A vacuum cleaner comprising: 
 a cleaner body including at least a dust collecting chamber and a motor chamber;    a brush assembly configured to be connected to the dust collecting chamber;    a motor disposed at the motor chamber and including at least a motor body and a motor blade portion;    at least one inner motor casing configured to enclose at least a part of the motor; and    at least one outer motor casing configured to enclose at least a part of the at least one inner motor casing,    wherein air at the motor is caused to change direction when passing along at least one of the at least one inner motor casing and the at least one outer motor casing.    
   
   
       10 . The vacuum cleaner as claimed in  claim 9 , wherein the at least one inner motor casing and the at least one outer motor casing each include at least one air passing hole configured to allow air escaping from the motor to pass therethrough.  
   
   
       11 . The vacuum cleaner as claimed in  claim 10 , wherein the at least one air passing hole is formed at a rear of the at least one outer motor casing.  
   
   
       12 . The vacuum cleaner as claimed in  claim 10 , wherein the at least one outer motor casing is configured to entirely enclose the at least one inner motor casing.  
   
   
       13 . A motor assembly, comprising: 
 a motor;    at least one inner motor casing configured to enclose at least a part of the motor;    at least one outer motor casing configured to enclose at least a part of the at least one inner motor casing; and    means for changing a direction of air flow between the at least one inner motor casing and the at least one outer motor casing.    
   
   
       14 . The motor assembly as claimed in  claim 13 , wherein the means for changing changes the direction of the airflow between substantially 90° and substantially 180°.  
   
   
       15 . The motor assembly as claimed in  claim 13 , further comprising at least one air passing hole formed at at least one of the at least one inner motor casing and the at least one outer motor casing.  
   
   
       16 . The motor assembly as claimed in  claim 15 , wherein the at least one air passing hole includes a plurality of air passing holes.  
   
   
       17 . The motor assembly as claimed in  claim 16 , wherein a portion of the plurality of air passing holes is formed at the at least one inner motor casing.  
   
   
       18 . The motor assembly as claimed in  claim 17 , wherein a second portion of the plurality of air passing holes is formed at the at least one outer motor casing.  
   
   
       19 . The motor assembly as claimed in  claim 17 , wherein the at least one air passing hole of the second portion is provided at a rear portion of the at least one outer motor casing.