Electric vacuum cleaner

Abstract

The electric vacuum cleaner is disclosed which includes a main body within which an electric blower and cyclonic separation cylinder are provided. A dust collecting case is provided in communication with the cyclonic separation cylinder to receive dust that has been separated from the inlet tube. The dust collecting case also includes a filter arranged therein. Air received from the inlet tube is separated such that a portion is passed through the dust collecting case and a communicating passage. The air is subsequently merged and discharge through the electric blower.

1 . A vacuum cleaner comprising: 
 an electric vacuum cleaner main body within which an electrically driven blower installed;    a cyclonic separation cylinder provided on said electric vacuum cleaner main body for flowing dust containing air sucked from a suction port into an inlet tube and removing dust according to a centrifugal separation; and    an inner cylinder provided on said cyclonic separation cylinder having an exhaust air port;    wherein    said exhaust air port includes an opening portion arranged in a substantially parallel orientation with said inlet tube.    
   
   
       2 . An electric vacuum cleaner according to  claim 1 , 
 wherein    said electric vacuum cleaner further comprises:    a dust collecting case provided on said electric vacuum cleaner main body and having an opening which communicate with said cyclonic separation cyliner;    a filter arranged on said dust collecting case; and    a communicating passage formed separately from said cyclonic separation cylinder and said dust collecting case for communicating with said exhaust air port; wherein    air passed through said filter and air clown out from said communicating passage are merged, and said merged air is sucked into said electrically driven blower.    
   
   
       3 . An electric vacuum cleaner according to  claim 1  or  2 , wherein a net filter is provided at a cylindrical portion of said inner tube.  
   
   
       4 . An electric vacuum cleaner according to  claim 1  or  2 , wherein 
 said cyclonic separation cylinder is formed with a substantially cylindrical shape; and    said inlet tube is arranged at a position where air flows into at a substantially tangential direction to said cyclonic separation cylinder.