双级热泵系统是获得高温工质的一个重要研究方向。
Two-stage heat pump system is an important research direction which can acquire high temperature working fluid.
并以吉林市松滨度假村为研究对象，建立了该双级热泵系统的系统组成。
Because of the characteristic of the system, we choose Songbin Resort as object to study the double-stage heat pump system.
介绍了自行设计的双级热泵实验系统，分析了实验中遇到的问题，提出了改进方案。
Presents the two-stage heat pump test-bed designed by the authors, analyses the problem existed in experiment and offers the improving method.
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