第23卷第1期2023年1月REFRIGERATIONANDAIR-CONDITIONING38-41收稿日期:2021-06-15,修回日期:2021-08-04作者简介:周金声,主要研究方向为空调制冷系统相关设计与优化。户外一体化机柜空调低环境温度制冷系统研究周金声陈国豪熊军梁志滔苏培焕(TCL空调器(中山)有限公司)摘要针对户外一体化机柜低环境温度制冷的需求,笔者开发了配套机柜空调的低温制冷功能,在不额外增加成本的情况下,通过检测空调室外侧冷凝器出口温度,制定外风机周期性开停控制策略。结合试验测试,如在外侧干球-15℃,内侧干球20℃工况下,在单个外风机开停周期中,外风机关闭时,压缩机底部过热度有出现低于0℃的情况,最低达-12℃,持续时间约115s,而外风机开启时,底部过热度快速增大,最高达40.5℃,大于0℃的持续时间约40s。通过观察压缩机底部额外开孔配置的视窗镜可以发现,整个过程中,制冷剂基本来不及沉积,压缩机润滑油位也在合理范围内,因此,压缩机不会缺油。另外,运行过程中,吸气过热度基本大于0℃,回液风险低。关键词户外一体化机柜;机柜空调;低温制冷;外风机开停控制;压缩机底部过热度;吸气过热度ResearchonlowambienttemperaturerefrigerationsystemofoutdoorintegratedcabinetairconditionerZhouJinshengChenGuohaoXiongJunLiangZhitaoSuPeihuan(TCLAirConditioner(Zhongshan)Co.,Ltd.)ABSTRACTInviewofthedemandforlowambienttemperaturecoolingofoutdoorintegratedcabinets,theauthorhasdevelopedthelow-temperaturerefrigerationfunctionofsupportingcabi-netairconditioners,andformulatedaperiodicstart-stopcontrolstrategyforexternalfansbyde-tectingtheoutlettemperatureofthecondenserontheoutdoorsideoftheairconditionerwithoutadditionalcost.Combinedwiththetest,suchasintheouterdrybulb-15℃,theinnerdrybulb20℃workingconditions,inasingleexternalfanstart-stopcycle,whentheexternalfanisclosed,thebottomofthecompressorsuperheathasasituationoflessthan0℃,thelowest-12℃,thedurationisabout115s,andwhentheexternalfanisturnedon,thebottomsuper-heatincreasesrapidly,upto40.5℃,andthedurationofgreaterthan0℃isabout40s.Byobservingthewindowmirrorwiththeadditionalopeningatthebottomofthecompressor,itcanbefoundthatinthewholeprocess,therefrigerantbasicallyhasnotimetodeposit,andthecompressorlubricatingoillevelisalsowithinareasonabler...
