FIELD: machine building.
SUBSTANCE: cleaning device, which is a source of noise emitted in the frequency range below 2000 Hz, is provided with at least one cavity with a perforated plate, having a chamber with a cavity and a housing and at least one perforated plate covering the cavity of the chamber and acoustically connected with the cleaning device.
EFFECT: suction device is described, comprising a suction unit, a dirt collector, a filtering device through which the dirt collection unit communicates with the suction unit, and a cleaning device for cleaning the filtering device.
21 cl, 4 dwg
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