制冷原理中英文对照.docx

制冷原理培训教材
Refrigerationprincipletrainingmaterial

一：制冷原理简介
Refrigerationprinciple
本系统属于蒸汽压缩式制冷循环，主要包括压缩机、冷凝器、毛细管、干燥过滤器、蒸发器5个部件，经过压缩、冷凝、节流、蒸发四个过程不断循环，制冷剂周期性的发生从蒸汽变为液体，从液体变为蒸汽的状态变化，不端的把冰箱内的热量转移到冰箱外部，从而达到制冷目的。
Theapplianceincorporatesavaporcompressorrefrigerationsystemthatconsistsofcompressor,condenser,capillary,filterdrierandevaporatorandaccomplishestherefrigerationthroughthecycleofcompression,condensation,throttling,andevaporation.Theprocessrepeatsandextractstheheatfromthefridgecompartmentbyhavingtherefrigerantevaporatedintheevaporatorandliquefiedinthecondenser.
二：主关件简介：
Maincomponents
(一)：压缩机
Compressor
制冷系统的“心脏”，起压缩和输送制冷剂的作用，目前所用为往复活塞式压缩机。
Servingastheheartoftherefrigerationsystem,thecompressorfunctionsthroughcompressingandpassingtherefrigerant.Areciprocalcompressorisadoptedinthesystem.
主要性能指标
Performance
1:制冷量:压缩机工作时,每小时从被冷却物体带走的热量以(千焦/小时)活或瓦表示.制冷量大小随工况条件变化,工况条件不同制冷量大小不同.
1.Coolingcapacity:refertotheheatinkilojoule/hourextractedfromthearticlestobecooleddowninanhour.Thecoolingcapacitychangesalongwiththeoperatingconditions.
2.功率.是指压缩机每小时耗功的大小.
Power:refertohourlypowerconsumptionofthecompressor.
3.性能系数COP:性能系数就是制冷量与:压机输出功率大小之比,COP越大说明耗电量越小,冰箱越节能.
COP:refertothecoolingcapacity–outputpowerratio.ThehighertheCOPvalue,thelowertheenergyconsumption.
压缩机三个重要附件:
Threeessentialaccessories:
启动控制器
Startcontrol
电冰箱刚开始启动时,PTC元件温度较低,电阻小,启动绕组接通,由于启动电流大,PTC温度随之升高,当达到临界温度电阻猛增到数万欧姆,可视为断路.于是与之串联的起动绕组断电,运转绕组正常工作.PTC是一种无触电开关,但停机后由于PTC温度仍很高,所以无法马上启动.
ThePTCelementhasalowtemperatureandsmallresistancewhentheappliancestarts.Thestartingwindingisenergized.ThePTCtemperaturerisesalongwiththeincreaseofthestartingcurrentandreachesthethresholdtemperaturewhentheresistancecomesuptothousandsofohms,whichisdeemedasanopencircuit.ThenthestartingwindinginserieswiththePTCopensandtherunningwindingworksnormally.PTCisano-touchswitch.Whentheapplianceisturnedoff,itcannotstartimmediatelybecausethePTCtemperatureisstillveryhigh.

过载保护器
Overloadprotector
过载保护器是用来防止压缩机过载和过热而烧毁电动机而设置的,海尔压机一般采用碟形保护器.
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