高压氩气节流型低温探针的实验研究  

Experimental study on a cryoprobe utilizing throttling of high pressure argon

作　　者：王宏宇[1,2] 张绍志[1] 陈光明[1] 吕维敏 姜红强 

机构地区：[1]浙江大学制冷与低温研究所,杭州310027 [2]浙江省建筑设计研究院,杭州310006 [3]浙江省医疗器械研究所,杭州310009

出　　处：《低温工程》2014年第1期22-26,共5页Cryogenics

基　　金：浙江省生物材料低温保存实验及社会公共服务平台项目(2012F10020)资助

摘　　要：设计制作了直径5 mm的基于高压氩气节流制冷的低温探针,并通过实验测试了探针的冷冻性能。在进气压力20 MPa时,1 min内探针尖端在296.3 K空气中最低温度可以达到112.9 K。在进气压力18 MPa时,探针在291 K的水中5 min内能够形成尺寸4.9×2.8 cm的椭圆形冰球。预冷进气使温度从290.4 K降到274.3 K,能够使探头冷量输出增加约24%。The cryoprobe with 5 mm diameter which utilized the refrigeration effect of high pressure ar- gon throttling was made. Experiments were carried out to test the cryoprobe＇ s performance. When the inlet pressure was kept at 20 MPa, the lowest temperature at the cryoprobe＇ s tip could reach 112.9 K in the at- mosphere at 296.3 K in one minute. When the inlet pressure was kept at 18 MPa, an ice ball with size of 4.9 x 2.8 cm could be formed in 291 K water within 5 minutes. Precooling inlet gas temperature from 290.4 K to 274.3 K could increase the refrigeration output by about 24%.

关 键 词：低温探针 氩气 节流制冷 冰球 低温外科 

分 类 号：TB69[一般工业技术—制冷工程] TB66