Patent ID: 8914941
Filing Date: 2014-12-23
Classification: A47L

Abstract:
1. A cyclone dust collecting apparatus for a vacuum cleaner comprising: a first chamber; an entering passage disposed above the first chamber, the entering passage guiding outer air to form a downwardly whirling air current in the first chamber; a second chamber formed at a position higher than that of an outlet of the entering passage above the first chamber, the second chamber in which the outer air entering from the first chamber whirls; a contaminants-blocking member disposed at a center of the first chamber and spaced apart from a bottom surface of the first chamber to prevent contaminants and water separated in the first chamber from moving into the second chamber; and a grill disposed inside the second chamber to be in fluid communication with an air discharging port through which clean air is discharged, wherein the entering passage is formed in a helical pipe shape wound at least one turn along the first chamber, and wherein the outlet of the entering passage is formed at a position that is lower than that of an inlet of the entering passage and that is the same as or lower than that of the contaminants-blocking member, wherein the first chamber is formed in a lower case to have a cylindrical shape, and the second chamber is formed in an upper case to be coupled to a top portion of the lower case, and wherein the entering passage is formed in a helical insert that is disposed inside the upper case, and the helical insert comprises a hollow insert body having an inner diameter smaller than that of the upper case and a guiding member disposed in a helical shape on an outer circumferential surface of the insert body.