一种新型大容积低温箱的研制

Study on a kind of new type low temperature cabinet with big volume

介绍了一种新型大容积低温箱的研制情况.该低温箱采用了由两个单级压缩系统组成的复叠式制冷系统,其中高温循环系统采用R22作为制冷剂,低温循环系统采用R13作为制冷剂.R22系统既可以单独运行,又可以与R13系统复叠运行,因此系统可以达到-70℃和-20℃两个蒸发温度.同时,低温箱内工作室净容积达到0 216m3,在-70℃的低温下,低温箱制冷系统仍能稳定运行.

A kind of new type low temperature cabinet with big volume is studied in this paper. The low temperature cabinet adopts double-refrigerant-system, including two single-stage compressors. R_(22) is selected to be refrigerant in the high temperature circle system, and R_(13) is selected to be refrigerant in the low temperature circle system. The R_(22) system can operate both alone and with the R_(13) system. So two vapor temperatures appear: -70 ℃ and -20 ℃.The volume of the new type low temperature cabinet is up to 0.216 m^3.Refrigerant system may operate stable while the temperature is -70 ℃.