Separation structure for dust cup of vacuum cleaner

Abstract

A separation structure for a dust cup of a vacuum cleaner is provided and includes a cyclone separator. The cyclone separator is provided with a connecting ring, a plurality of arc blades, a plurality of flat plates, a conical tube and a cylindrical tube. Each arc blade has a top fixedly connected with the connecting ring and a bottom fixedly connected with a respective flat plate. The flat plates are fixedly mounted at a large end of the conical tube. A plurality of air inlets are formed by gaps defined by the connecting ring, the arc blades and the flat plates. The cylindrical tube is fixedly connected with and communicated with the conical tube. A small end of the conical tube is received in the cylindrical tube. An included angle between each arc blade and the respective flat plate is an obtuse angle.

What is claimed is: 
     
         1 . A separation structure for a dust cup of a vacuum cleaner comprising a cyclone separator, wherein the cyclone separator is provided with a connecting ring, a plurality of arc blades, a plurality of flat plates, a conical tube and a cylindrical tube, each of the plurality of arc blades has a top fixedly connected with the connecting ring and a bottom fixedly connected with a respective one of the plurality of flat plates, the plurality of flat plates are fixedly mounted at a large end of the conical tube, a plurality of air inlets are formed by gaps defined by the connecting ring, the plurality of arc blades and the a plurality of flat plates, the cylindrical tube is fixedly connected with and communicated with the conical tube, a small end of the conical tube is received in the cylindrical tube, and an included angle between each of the plurality of arc blades and the respective one of the plurality of flat plates is an obtuse angle. 
     
     
         2 . The separation structure according to  claim 1 , wherein the cyclone separator is provided with four arc blades and four flat plates, the four arc blades and the four plates are uniformly arranged at the large end of the conical tube along a circumference of the large end to define four air inlets. 
     
     
         3 . The separation structure according to  claim 2 , wherein the small end of the conical tube is provided with four dust discharging openings and one dust falling opening. 
     
     
         4 . The separation structure according to  claim 3 , further comprising a dust cup, a dust-proof skirt, and a filter screen, wherein a bottom of the filter screen is fixedly connected to the dust-proof skirt, the dust-proof skirt and the filter screen are received in the dust cup, and a bottom of the cylindrical tube abuts on a bottom wall of the dust cup. 
     
     
         5 . The separation structure according to  claim 4 , wherein a height from an upper surface of the connecting ring to a lower surface of the flat plate is H 1 , a height of the conical tube is H 2 , and a ratio of H 2  to H 1  is in a range of 2 to 3. 
     
     
         6 . The separation structure according to  claim 5 , wherein a height of the filter screen is H 3 , and a ratio of H 3  to H 1  is in a range of 2 to 2.5. 
     
     
         7 . The separation structure according to  claim 6 , wherein a maximum outer diameter of the air inlet along a central axis is D 1 , an outer diameter of the filter screen is D 2 , and a ratio of D 1  to D 2  is in a range of 0.8 to 0.9. 
     
     
         8 . The separation structure according to  claim 7 , wherein a distance from an outermost side of the dust-proof skirt to an inner side surface of the dust cup is D 3 , which is in a range of 6 mm to 10 mm.