DUST-COLLECTING APPARATUS FOR VACUUM CLEANER (VERSIONS) Russian patent published in 2008 - IPC A47L9/16 A47L5/22 

FIELD: mechanical engineering, in particular, dust-collecting equipment providing reduction of noise created upon passage of vortex air flows at high speed through multiple-cyclone dust-collecting apparatus.

SUBSTANCE: dust-collecting apparatus for vacuum cleaner has first filtering chamber for filtering of relatively large-sized foreign matter, and second filtering chamber for filtering of relatively small-sized foreign matter. Discharge member is positioned above filtering chambers for guiding of air flow. Dust-collecting chamber is disposed under said filtering chambers and is adapted for collecting of foreign matter filtered out in filtering chambers. Dust-collecting apparatus has sealing member for sealing bottoms of filtering chambers and rectifying device provided at discharge side of second filtering chamber and adapted for rectifying of air flow in order to reduce noise created by said air flow. Rectifying device has at least one plate extending toward second filtering chamber.

EFFECT: increased efficiency in reducing noise created by high-speed air flow to thereby eliminate sense of discomfort felt by user during usage of vacuum cleaner, and provision for creating of dust-collecting apparatus capable of suppressing high-frequency noise generated by air flow in relatively small diameter tube of dust-collecting apparatus.

17 cl, 10 dwg