Domestic vacuum cleaner with axial cyclone

Claim 1

Vacuum cleaner with multiple cyclones arranged in cascade, for domestic use, comprising a first tangential cyclone (1) with an outlet at the top of said cyclone and a first container (3) for collecting particles, arranged below said first cyclone, characterized in that it comprises: a first internal duct (6, 24) coaxial with said first tangential cyclone (1) having its top communicating with the outlet of said first cyclone and bottom end connected via a diffuser (5, 25) to said first container (3), a swirling device or axial cyclone (7) housed in said duct (6, 24), a capturing or centrifuging ring (11, 32) housed in said duct, downstream of said swirling device (7), relative to an air flow entering said 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 (11, 32) forming together with said diffuser (5, 25) an interspace for the passage of said peripheral flow fraction, a second tangential cyclone (17, 21) communicating with said interspace so as to receive said peripheral fraction of flow, said second cyclone extending at the bottom into a second container (18, 23) for collecting particles, and a second duct (19, 20), axially aligned with said first duct (6, 24) and extending inside said second container, in communication with said capturing ring (11) and said second cyclone so as to receive said remaining fraction of flow through said ring (11) and said peripheral flow fraction from said second cyclone (17, 21) and convey both said fractions down towards suction means (15).