CABIN VENTILATION SYSTEM FOR AIR-CONDITIONING OF PASSENGER AIRCRAFT FUSELAGE COMPARTMENTS Russian patent published in 1997 - IPC

FIELD: air-conditioning systems of aircraft fuselage. SUBSTANCE: cabin ventilation system with air recirculation includes fresh air preparation unit 8 and air mixing device 9 and air-conditioning zone 10 located after device 9 which are connected in row relative to air flow. Connection is provided between inlet of unit 8 supply control unit 11 located before it. Fresh air (preferably air taken from engines) is fed to inlet of air supply control valve unit 11. Valve control unit 12 located between air mixing device 9 and air-conditioning zone 10 is used for compensation of air flow to whose inlet part of fresh air is fed which is supplied to air supply control valve unit 11. After air-conditioning zone, cabin air recirculation unit is located which supplies mixing device 9 with prepared recirculated air. Air recirculation unit consists of unit 7 of corpuscle filters and/or deodorizer filters, ventilation unit 6, carbon dioxide absorption unit 5 and heat exchanger unit 4 through which recirculating air being prepared flows in above-mentioned succession. This air is fed to air mixing device 9 and after mixing it with fresh air, mixture is directed to air-conditioning zone. System is controlled by means of cabin pressure control unit 1, air-conditioning plant control unit 2 and cabin zone control unit 3 to which control circuits 13 are connected. These control circuits are connected with fresh air preparation unit 8, air mixing unit 9, air-conditioning zone 10 and additional control valve units 11 and 12, thus realizing the required control of supply of fresh air, recirculating air, pressure and temperature in ventilation system of cabin with air recirculation. EFFECT: enhanced efficiency. 10 cl, 3 dwg