DUSTPROOF SHELTER Russian patent published in 1999 - IPC

FIELD: ventilation system; forming dustproof working stations in performing processes including release of toxic agents. SUBSTANCE: proposed shelter includes casing and working table located in working zone; table top is made form of exhaust duct perforated in upper portion. Delivery ducts of clean and working zones are provided with air filters and air distributing grids. Duct of curtain located over contour of clean zone is connected with delivery duct provided with air distributing grid having honeycomb section, branch pipes for deliver of air to pressure duct of clean zone and discharge of air from exhaust duct. Air distributing grid of each section of broken line of duct of curtain in exhaust duct has bladed section at area where they adjoin each other at fan-like position of blades. Provided on either side of pressure duct of working zone coaxially relative to adjoining sections of duct of curtain are additional ducts where bladed air distributing grids are located; blades are arranged in fan-shaped pattern. Pressure duct of working zone is connected with branch pipe supplying air to pressure duct of clean zone by means of air line. EFFECT: enhanced reliability. 4 dwg