SUPPLY VENTILATION DEVICE Russian patent published in 2012 - IPC F24F7/10 

FIELD: ventilation.

SUBSTANCE: supply device comprises an insulated vessel, inside which there is a windproof valve, a noise-suppression insert, a filter, a controlled ventilation grid, an external protective grid. The windproof valve in its turn comprises a vessel with a stop plank and several windproof tabs of various mass with stiffening ribs. Windproof tabs are hingedly fixed in vessel walls with the possibility of displacement relative to the axis of fixation, and are arranged with present curvature of surface. Automatic control of air flow is carried out by serial closure of windproof tabs, modification of their shape (curvature) at high pressure drops, and accordingly opening of tabs with reduction of pressure drops. The noise-suppression insert is made from a finely porous material and comprises a row of inclined slots made at the angle to the frontal surface.

EFFECT: control of air flow in a room.

3 cl, 3 dwg