FIELD: ventilation.
SUBSTANCE: external device of the supply ventilation system includes a cylindrical body with tangentially arranged air intake pipes, an air outlet and an output unit for the separated particles, the air intake pipes being arranged circumferentially in a plane perpendicular to the axis of the housing and the nozzle axes at an angle to the circumference. In addition, at the end of the body of the device, opposite the outlet of the air, a ventilation flap is installed.
EFFECT: device provides protection of the supply ventilation systems from mechanical impurities in the external air intake and ensures their operability with the possibility of forced withdrawal of trapped impurities to any convenient location.
2 cl, 5 dwg
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