Grill assembly and cyclone dust collecting apparatus for vacuum cleaner having a grill assembly

Abstract

A grill assembly of a cyclone dust collecting apparatus for use in a vacuum cleaner is disclosed. The grill assembly includes provisions that help to block dust ascending towards the grill body and deflect that dust towards a whirling air current. The grill assembly has a blocking member that can include a first member formed as a frustum-cone and a second member formed as a hollow cylinder.

What is claimed is:  
     
         1 . A grill assembly of a cyclone dust collecting apparatus for use in a vacuum cleaner, being arranged at an entrance of an air discharge pipe of a cyclone body where a whirling air current is formed from dust-laden air and wherein the dust is separated from the dust-laden air by a centrifugal force of the whirling air current, the grill assembly for preventing the escape of dust comprising: 
 a grill body;    a plurality of air passages formed on the grill body; and    a dust blocking member arranged at a lower portion of the grill body, blocking the dust entrained in an air current ascending toward the grill body thereby deflecting the dust toward the whirling air current,    the dust blocking member comprising, 
 a first member formed as a frustum-cone having a gradually increasing diameter downward; and  
 a second member formed as a hollow cylinder vertically extending from a lower side of the first member, and having a predetermined length.  
   
     
     
         2 . The grill assembly of  claim 1 , wherein the plurality of air passages are formed by a plurality of blades that are arranged along an outer surface of the grill body at a predetermined distance from one another.  
     
     
         3 . The grill assembly of  claim 1 , wherein the dust blocking member is removably connected to a lower side of the grill body by a connector.  
     
     
         4 . The grill assembly of  claim 3 , wherein the connector comprises: 
 a pair of connecting holes oppositely formed in an inner surface of a lower part of the grill body, each connecting hole having a position guiding portion having a open lower end and a connecting part vertically spaced from the open lower end of the position guiding portion; and    a pair of connecting protrusions formed on an outer surface of an upper side of the dust blocking member, wherein the pair of connecting protrusions align with the pair of connecting holes.    
     
     
         5 . The grill assembly of  claim 3 , wherein the connector comprises a screw being fastened from a lower side of the dust blocking member to a lower side of the grill body.  
     
     
         6 . The grill assembly of  claim 1 , wherein the second member of the dust blocking member has a length of between 10 to 30 mm.  
     
     
         7 . The grill assembly of  claim 6 , wherein the second member of the dust blocking member has a length of between 15 to 20 mm.  
     
     
         8 . A cyclone dust collecting apparatus for use in a vacuum cleaner, attached to an inlet extension pipe of a canister type vacuum cleaner and configured to separate a dust by whirling dust-laden air drawn into the cyclone dust collecting apparatus, comprising: 
 a cyclone body comprising a first connecting pipe connected to the inlet extension pipe for receiving air, and a second connecting pipe connected to an outlet extension pipe for discharging air;    a dust receptacle removably mounted on the cyclone body, for collecting dust separated from the dust-laden air whirling in the cyclone body by the centrifugal force; and    a grill assembly arranged at an entrance of the second connecting pipe inside of the cyclone body, for preventing the separated dust from escaping through the second connecting pipe,    the grill assembly comprising, 
 a grill body comprising a first grill body portion having a supporting rib adapted to engage the cyclone body, and a second grill body portion formed as a hollow cylinder integrally extending from the first grill body portion,  
 a plurality of air passages formed on the outer surface of the second grill body portion, the air passages placing air outside of the grill assembly in fluid communication with the second connecting pipe, and  
 a dust blocking member disposed at a lower portion of the second grill body, for blocking the dust entrained in an ascending air current toward the grill body so as to deflect the dust toward the whirling air current, the dust blocking member comprising a first member formed as a frustum-cone having a gradually increasing diameter downward, and a second member vertically extending downward from the first member, the second member having a predetermined length.  
   
     
     
         9 . The cyclone dust collecting apparatus of  claim 8 , wherein the plurality of air passages are formed by a plurality of blades arranged along an outer surface of the second grill body at a predetermined distance from one another, allowing fluid to pass between the air passages.  
     
     
         10 . The cyclone dust collecting apparatus of  claim 8 , wherein the dust blocking member is removably connected to a lower portion of the second grill body by a connector.  
     
     
         11 . The cyclone dust collecting apparatus of  claim 10 , wherein the connecting means comprises: 
 a pair of connecting holes oppositely formed in an inner surface of a lower part of the second grill body, each connecting hole having a position guiding portion having an open lower end and a connecting part vertically spaced from the open lower end of the position guiding portion; and    a pair of connecting protrusions formed on an outer surface of an upper side of the dust blocking member, wherein the connecting protrusions correspond the pair of connecting holes.    
     
     
         12 . The cyclone dust collecting apparatus of  claim 8 , wherein the second member of the dust blocking member has a length of between 10 to 30 mm.  
     
     
         13 . The cyclone dust collecting apparatus of  claim 12 , wherein the second member of the dust blocking member has a length of between 15 to 20 mm.  
     
     
         14 . A cyclone dust collecting apparatus for use in a vacuum cleaner, which is mounted in a dust collecting chamber of an upright type vacuum cleaner and separates dust from dust-laden air by whirling the dust-laden air drawn therein through an air intake path formed in fluid communication with a suction brush of the upright type vacuum cleaner, and discharges clean air after dust separation through an air discharge path formed in fluid communication with a motor chamber of the upright type vacuum cleaner, the cyclone dust collecting apparatus comprising: 
 a cyclone body comprising an air intake pipe connected to the air intake path, and an air discharge pipe connected to the air discharge path;    a dust receptacle removably connected to the cyclone body for collecting dust separated from the dust-laden air whirling inside of the cyclone body by a centrifugal force; and    a grill assembly arranged at an entrance of the air discharge pipe inside of the cyclone body, for preventing dust separated from the dust-laden air from escaping through the air discharge pipe,    the grill assembly comprising, 
 a grill body formed as a hollow cylinder with open upper end,  
 a plurality of air passages formed on an outer surface of the grill body in fluid communication with the air discharge pipe, and  
 a dust blocking member arranged at a lower portion of the second grill body, for blocking the dust entrained in an ascending air current toward the grill body, and deflecting the dust toward the whirling air current, the dust blocking member comprising a first member formed as a frustum-cone having a gradually increasing diameter downward, and a second member vertically extending down from the first member, the second member having a predetermined length.  
   
     
     
         15 . The cyclone dust collecting apparatus of  claim 14 , wherein the plurality of air passages are formed by a plurality of blades arranged along an outer surface of the grill body at a predetermined distance from one another, allowing fluid to flow through the air passages.  
     
     
         16 . The cyclone dust collecting apparatus of  claim 14 , wherein the dust blocking member is removably connected to a lower portion of the grill body by a connector.  
     
     
         17 . The cyclone dust collecting apparatus of  claim 16 , wherein the connector comprises a screw fastened from a lower side of the dust blocking member to a lower side of the grill body.  
     
     
         18 . The cyclone dust collecting apparatus of  claim 14 , wherein the second member of the dust blocking member has a length of between 10 to 30 mm.  
     
     
         19 . The cyclone dust collecting apparatus of  claim 18 , wherein the second member of the dust blocking member has a length of between 15 to 20 mm.