两级压缩和单级补气式滚动转子压缩机应用于热泵系统的理论与实验研究

摘要

The heat pump is an important energy-saving device, but theory and practice prove that the traditional heat pump system cannot work properly when the ambient temperature is lower than-15℃. The two-stage compression or single stage compression with vapor-injection is relatively mature technology to improve the heating effect of air source heat pump. This paper compares these two kinds of technology in theory and experiment. The results show that these two kinds of technology can improve the heating effect in low-temperature. The single stage compression with vapor-injec-tion has the ability and efficiency advantages in a wide temperature range and also its structure is relatively simple.%热泵是一种重要的节能装置，但是理论与实践证明传统热泵系统在-15℃以下低温环境无法正常工作。两级压缩和单级补气技术是目前针对空气源热泵低温制热改善方案中实际应用相对较成熟技术。对两种技术方案进行了理论分析及实验对比，分析结果表明，单级补气及两级压缩均能较好地改善低温制热效果，单级补气结构相对简单，在较大温度范围具有能力及能效优势。