摘要
氩氦刀系统低温探针的温度及制冷量,主要取决于氩气进气温度和节流压力。文中介绍了氩氦刀低温探针的结构、工作过程以及对5mm直径低温探针的制冷性能试验。试验结果表明,当进气压力为20MPa时,1分钟内探针端部在296.3K的空气中,最低温度可达112.9K;当进气压力为18MPa时,探针在291K的水中5分钟内能够形成4.9cm×2.8cm的椭圆冰球;将预冷进气温度从290.4K降低至274.4K,可以使探针制冷量增加约24%。
The cryogenic temperature and refrigeration output of Ar-He cryosurgery system depend on the inlet argon temperature and J-T pressure. The paper introduced the cryoprobe structure of Ar-He crosurgery system,working process and experimental investigation on refrigeration performance of cryoprobe with 5mm diameter. The experimental resuls show when the inlet pressure was kept at 20 MPa,the lowest temperature of the cryoprobe tip could reach 112. 9K in the atmosphere at 296. 3K in 1 minute. When the inlet pressure was kept at 18 MPa,an elliptic ice ball with size of 4. 9cm × 2. 8cm could be formed in 291 K water within 5 minutes. Precooling inlet argon temperature from 290. 4K to 274. 3K could increase the refrigeration output by about 24%.
出处
《低温与超导》
CAS
北大核心
2014年第12期15-18,29,共5页
Cryogenics and Superconductivity
基金
浙江省科技计划项目"低温微创手术系统实验室建设"(2013F10063)资助
关键词
氩气
低温探针
压力控制
制冷量
Argon
Cryoprobe
Pressure control
Refrigeration outpu
