制冷系统启动过程电子膨胀阀的控制陈文勇.pdfVIP

　 36 2 上 海 交 通 大 学 学 报 V ol. 36 N o. 2　 　2002 2 JO U RN AL O F S HAN GHA I J IAO TO N G U N IV E RSIT Y Feb. 2002　 　　: 1006-2467 ( 2002 02-0210-04 1 1 2 2 陈文勇 ,　陈芝久 ,　朱瑞琪 ,　吴业正 ( 1. , 2000 30; 2. ,710049 　: 通过分析热力膨胀阀启动过程的特 ,发现可能出现过热度长时间为零的情况.为此,将 零过热度时间作为 一个重要的指标,用于电子膨胀阀的启动控制;提出了制冷系统启动过程中改善 零过热度时间以及兼顾其他性能指标的电子膨胀阀的启动控制策略,取得了比较满意的结果. : 电子膨胀阀; 过热度; 控制 : TB 663　　　: A - Elect ronic Expansion Valve Cont rol during t he St art up of Ref rigerat ion System 1 1 2 2 - ,　 - ,　 - ,　 - CH EN Wen y ong C HEN Zh i j iu Z HU R u i qi W U Ye z h eng ( 1. Inst. o f Ref rig eratio n a nd Cryog enic Eng. , Shanghai Jiao to ng Univ . , Shanghai 200030, China 2. Inst. o f Ref rig eratio n a nd Cryog enic Eng. , Xi a n Ji aot ong Univ. , Xi an , 710049 : - . Abstract The paramet ers of ref rig eratio n syst em chang e largely and rapidly duri ng the start up If the electro nic ex pansio n v alv e i s u sed as thro tt le device, the co ntro l st rat eg y i s dif f erent f rom that of sta ble op- eratio n. The perf o rm ance of thermo st atic ex pansi on v alv e during the star t-up was analy zed . It is fo und that the superheat may be zero f or a lo ng tim e. A new index, Zero Superheat Tim e, was put fo rw ard, a nd applied t o the electro nic ex pansi on valv e co ntro l. Further, t he co nt ro l st rat eg y of elect ro ni c expansi on va lv e to i mprov e t