Dust-collecting device and vacuum cleaner

Abstract

A dust collecting device achieving higher efficiency in dust-and-dirt separation while suppressing adhesion of dust and dirt, and a vacuum cleaner equipped therewith. The dust-collecting device includes a cylindrical casing and an insertion part. The casing includes an introduction port allowing dust-containing air to be introduced inside. The insertion part is disposed inside the casing to allow swirling flow of the dust-containing air to be formed between the insertion part and an inner surface of the casing. The insertion part includes a cylindrical enlarged part, an opening part, and a wall part. The opening part is formed on a surface of the enlarged part in a side of a first centrifuge separator. The wall part projects at least at a position corresponding to an outside of the opening part, from the surface of the enlarged part in the side of the first centrifuge separator, toward the first centrifuge separator.

1 . A dust-collecting device comprising a separator configured to centrifugally separate dust and dirt by swirling dust-containing air, and a dust-collecting part configured to accumulate the dust and dirt separated by the separator, the dust-collecting device comprising:
 a cylindrical casing having an introduction port allowing the dust-containing air to be introduced inside; and   a structure disposed inside the casing so as to allow swirling flow of the dust-containing air to be formed between the structure and an inner surface of the casing,   the structure including:
 a cylindrical enlarged part; 
 an opening part formed on a surface of the enlarged part in a side of the separator; and 
 a wall part projecting at least at a position corresponding to an outside of the opening part, from the surface of the enlarged part in the side of the separator, toward the separator. 
   
     
     
         2 . The dust-collecting device according to  claim 1 , wherein
 the wall part includes an end part in the side of the separator, and the end part projects toward the separator over an end part of the introduction port in a side of the dust-collecting part.   
     
     
         3 . The dust-collecting device according to  claim 2 , wherein
 a protruding extent of the end part of the wall part in the side of the separator projecting toward the separator over the end part of the introduction port in the side of the dust-collecting part is set equal to or less than ¼ of a width of the introduction port in a longitudinal direction of the casing.   
     
     
         4 . The dust-collecting device according to  claim 1 , wherein
 a plurality of the opening parts are formed on the surface of the enlarged part in the side of the separator along an outer edge part of the surface.   
     
     
         5 . The dust-collecting device according to  claim 1 , wherein
 the structure includes a cylindrical ventilation part allowing to discharge the swirling flow,   the enlarged part is positioned in the side of the dust-collecting part with respect to the ventilation part, and is enlarged more outward than the ventilation part, and   the opening part is formed at a portion enlarged more outward than the ventilation part on the surface of the enlarged part in the side of the separator.   
     
     
         6 . A vacuum cleaner comprising the dust-collecting device according to  claim 1 .