| 摘要 |
Domestic vacuum cleaner with multiple cyclones arranged in cascade, in which a first tangential cyclone supplied with a flow of dust-laden air captures the coarser particles in a first container arranged below said first cyclone and discharges the air flow, partially purified, into a first internal duct coaxial with the first cyclone and housing an axial swirling device which concentrates the residual particles in a peripheral fraction of the flow, which is conveyed by a capturing ring into a second tangential cyclone, while the residual fraction of flow passes through the ring and is conveyed by a second duct, axially aligned with the first duct, to a suction unit. The captured fraction of flow conveyed into the second cyclone deposits the residual particles in a second container arranged below the second cyclone and thus purified is sucked into the second duct by the fraction of flow passing through the ring, which acts as an extractor nozzle.
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