L6-3-2 冷却系统部件讲解

CoolingSystemTheflowcontrolandshutoffvalve(FCSOV)controlsthequantityofairintotheairconditioningsystem.Anairmixvalveortemperaturecontrolvalve(TCV)【温度控制活门】dividesairfromtheflowcontrolandshutoffvalveintohotandcoldstreams【n.流；河流】.Thisvalveadjuststheproportion【n.比；比率】ofairthatgoesintooraroundthepack.Theproportionofairthatgoesintothepackcontrolstheairtemperatureintothecabin.TheairmixvalveorTCVispartofthetemperaturecontrolsubsystem.CoolingSystemTheprimaryheatexchanger【初级热交换器】

receivesbleedairfromtheflowcontrolandshutoffvalve.Asthebleedairgoesthroughtheheatexchanger,ramair【冲击气流】

removesheat.Thecooledbleedairgoestothecompressorsectionoftheaircyclemachine.CoolingSystemThesecondaryheatexchanger

receivescompressedairfromtheaircyclemachine.Astheairgoesthroughtheheatexchanger,ramairremovesheat.Afterthecompressedairiscooled,itgoesbacktotheaircyclemachine.CoolingSystemThereisanaircyclemachine(ACM)foreachoftheleftandrightpacksystem.TheACMisathree-wheelairbearing

aircyclemachine.左右组件系统各有一个空气循环机。该空气循环机是采用空气轴承的三轮式空气循环机。Itdecreasesairtemperaturebyexpansion【n.膨胀；扩大】throughaturbine.Itiscomprisedof

turbine,compressorandfanwhichareconnectedbyacommonshaft.它由通过一根共同的轴连接的涡轮、压气机和风扇组成。CoolingSystemTheairbearingslettheACMturnathighspeedwithlittlefriction.Cooledbleedairfromtheprimaryheatexchangerenterstheaircyclemachineandiscompressed.Thecompressedairthengoestoasecondaryheatexchangerandbacktotheaircyclemachine.Moisture【n.水分；湿气】

canberemovedfromtheairbeforeenteringintotheturbineofACMorafterexpendingfromit,dependingontheaircraftmodel.CoolingSystemTheramairsystem

controlsthequantityofoutsideambientairthatflowsthroughtheheatexchangers.Thewaterseparatorcollectsandremovesmoisturefromtheairbeforeitgoesintothedistributionsystem.Therearetwodifferentwaterseparators:lowpressurewaterseparatorandhighpressurewaterseparator.Theformerisusedon737-600/700andthelatterisusedon737-800/900.Theanti-icesystempreventsthewaterseparator,ACMorcondenser【n.冷凝器；电容器】

fromfreezing.CoolingSystemLowpressurewaterseparatorCoolingSystemThisisbeingusedmorefrequently