FIELD: air-conditioning systems; removal of dust from air flow. SUBSTANCE: flow of air is fed to first stage of cleaning on side of inlet flange and while passing through cyclones gets swirled by their blades, thus getting cleaned from large particles which are removed through dust discharge branch pipe together with part of flow. Other part of flow is directed to nozzles wherefrom it flows to second stage of cleaning - changeable cassette where air is finally cleaned of dust. EFFECT: enhanced efficiency. 7 dwg
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