VENTILATION SYSTEM OF PRODUCTION PLANT Russian patent published in 2013 - IPC F24F7/06 

FIELD: ventilation.

SUBSTANCE: invention includes an exhaust duct for contaminated air, to which a fan with an electric motor, a hazardous emission concentration sensor, dampers located along the perimetre of smaller diameter of exhaust duct for contaminated air are connected. The above system also includes an external exhaust duct for contaminated air, along the perimetre of larger diameter of which external hazardous emission concentration sensors are located, which, like the above hazardous emission concentration sensor, are connected to on-off concentration controls, an actuating element, electromagnetic actuating elements and an electric motor.

EFFECT: higher reliability and simpler design owing to excluding the possibility of propagation of hazardous substances in the whole volume of the room in case of considerable increase in their concentration, as well excluding the use of an air flow control and a rotation speed transducer of the electric motor.

1 dwg