Domestic vacuum cleaner with axial cyclone

Claim 1

An improved vacuum cleaner of the type containing multiple cyclones arranged in cascade, and in which a first tangential cyclone having a top portion with an outlet separates some particles from an air flow and deposits said some particles into a first container for collecting particles, said first container arranged below said first cyclone, wherein the improvement comprises: a diffuser; a first internal duct coaxial with said first tangential cyclone, said first internal duct having a top communicating with the outlet of said first cyclone and a bottom, said first internal duct being connected via the diffuser to said first container; a swirling device housed in said first internal duct; a capturing ring housed in said first internal duct, downstream of said swirling device, relative to the air flow entering said first internal duct from said top, so as to capture a peripheral fraction of the air flow and allow the remaining fraction to flow down through said ring, said capturing ring forming together with said diffuser an interspace for the passage of said peripheral flow fraction; a second container for collecting particles; a second tangential cyclone communicating with said interspace so as to receive said peripheral fraction of flow, said second cyclone having a bottom extending into the second container for collecting particles; and a second duct, axially aligned with said first internal duct and extending inside said second container, in communication with said capturing ring and said second cyclone so as to receive said remaining fraction of flow through said ring and said peripheral flow fraction from said second cyclone and exhaust both said fractions.