VENTILATION SYSTEM Russian patent published in 2024 - IPC E21F1/16 F24F7/06 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used for ventilation of underground mine workings. Ventilation complex includes the main fan unit, which provides suction of contaminated air and its removal into external atmosphere through a ventilation channel with a window, which is conjugated with a vertical shaft of the shaft. Besides, this plant comprises local ventilation fans arranged in vertical shaft. Local ventilation fans are located at different levels relative to the ventilation window. Fan mounted above the window is equipped with a slotted nozzle for formation of horizontal and slightly inclined flat air jets, and a guide element is fixed opposite this fan on the wall of the shaft. Local ventilation fan mounted above the window is equipped with a suction air duct with a receiving hole located below the window, and the lower local ventilation fan is installed opposite the ventilation window with the possibility of air supercharging towards this window.

EFFECT: increasing the efficiency of the ventilation system.

2 cl, 1 dwg