VENTILATION DEVICE WITH VARIABLE AIR SPEED Russian patent published in 2019 - IPC F24F13/12 F24F13/16 F24F13/24 F24F7/00 F24F13/06 F24F13/08 F24F13/10 

FIELD: ventilation.

SUBSTANCE: invention relates to the ventilation of dwellings and other buildings, including supply and exhaust ventilation. Ventilation device configured to attach to the mouth of the ventilation channel between the ventilation channel and the external space, the ventilation device includes an opening of the air flow for the passage of air flow between the ventilation device and the external space, in the above-mentioned hole of the air flow there is breathable material, the ventilation device includes an outer casing and the front cover, the hole of the air flow is formed between the first edge of the outer casing and the first side of the front cover, the breathable material has such a shape, that the air flow through the air flow hole has a velocity profile in breathable material in cross section in the air flow hole, the air flow rate is the smallest closest to the first side of the front cover and the largest in the part of the breathable material furthest from the first side of the front cover.

EFFECT: invention allows to produce a ventilation device in which a high degree of pressure throttling can be obtained without exceeding the recommended threshold values for sound levels.

33 cl, 9 dwg