FIELD: mechanical engineering.
SUBSTANCE: apparatus has first dust catching device, second dust catching device, and covering unit. First dust-catching device has first dust collector and guiding member. Second dust catching device is positioned circumferentially of first dust catching device and is adapted for separating of small-sized contaminant particles from air. Covering unit is positioned above first and second dust catching devices and is designed for directing of air delivered from first dust catching device to second dust catching device and for discharge to the outside of air delivered from second dust catching device.
EFFECT: reduced pressure losses.
7 cl, 3 dwg
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RU2315541C1 |
