制冷压缩机绪论.ppt

制冷压缩机主讲张晓青刘扬娟第一章绪论制冷系统和热泵系统的异同制冷压缩机的种类与分类二、分类制冷压缩机的发展概况往复式压缩机ReciprocatingCompressor动画片压缩过程过压缩（动压）排气过程膨胀过程动画片特点和趋势滚动转子式压缩机滚动转子式压缩机的工作过程特点与发展趋势SwingCompressor螺杆式压缩机HITACHIScrewCompressor日立特点：单螺杆压缩机工作过程容量调节100%容量调节70容量调节0%动画片Uniquestateoftheartdesign:Compact,simpleandrobustconstructionLackofvalvesorcriticalreciprocatingcomponentsincreasesresistancetoliquidsluggingandensuresmaximumreliabilityVerylowbearingload,well-balancedaxialandradialforcesbysymmetricalcompressionwithasinglerotorand2idleturninggaterotorsDurablepolymergaterotorseliminatefrictionandsignificantlyreducewearandenergylossesNooilpumpnecessary–compressorscrewiscooledandsealedofcompressorbyliquidrefrigerantinjection,resultinginaconstantworkingtemperaturethroughoutanextendedworkinglifeandallowingreducedrotorclearanceforaccurateandefficientcompressionVerylowvibrationlevels,resultinginlesswearandlowoperatingsoundlevel(silencerincorporatedwithincompressor)卧式涡旋压缩机日立公司立式工作过程Importantfeaturesinclude:CompactSize：Compact,simpleandrobustdesignGreaterReliability：LackofvalvesandincorporationofswinglinkmechanismensuresmaximumreliabilitySuperiorEnergyEfficiencyConstantcompressionensureslowenergyconsumption，highcompressionefficiencyduetoabsenceofvolumetricre-expansionQuietOperationLowoperatingsoundlevelLowstartingcurrent全封闭式全封闭式压缩机的剖视图半封闭式半封闭式压缩机的剖视图开启式开启式压缩机的剖视图CFCs和HCFCs的替代2.危害性指标3.替代时间表3.替代工质4.工质替代对制冷压缩机的影响Thankyou!