EXHAUST SHAFT Russian patent published in 2021 - IPC F24F7/02 

FIELD: ventilation.

SUBSTANCE: invention relates to the field of ventilation; it can be used to remove polluted air from livestock or industrial premises. An exhaust shaft includes an air duct of rectangular cross-section made of heat-insulating walls and a panel with an air layer transparent to solar radiation located on the south side, a screen made of heat-conducting material installed in the middle of the shaft parallel to the transparent panel, the surface of which, facing the panel, is covered with a light-absorbing layer, and a rotary valve. The screen and the rotary valve are made of heat-conducting material and are overlapped with the possibility of opening the rotary valve to close contact with the screen, while the rotary valve is connected to the screen with a part of the rotary valve protruding beyond the lower edge of the shaft with the possibility of heating by incandescent lamps placed near it to illuminate the premise at night and transfer heat to the screen.

EFFECT: invention makes it possible to increase air capacity in the dark.

1 cl, 1 dwg