关键词: 制冷温度, 复叠式

Abstract: Due to the gradual requirements of the refrigeration temperature, low temperature and the concept of ultra-low temperature, the refrigeration system is also further improved and delicated, which also generated the contents of this article-cascade refrigeration, as the name suggests, superposition of two sets of refrigeration system, composed of a new enhanced system to achieve the lower refrigeration temperature requirements.

Key words: Refrigeration temperature, Cascade type