双级复叠式空气源热泵冷热水机组的应用研究

Applied Research of Air-source Cascade Heat Pump Unit

提出了一种复叠热泵机组,以解决常规空气源热泵冷热水机组在寒冷地区冬季使用压缩比高、效率低等问题。该机组通过电磁阀可以在单级与复叠循环间切换;讨论了系统从单级转向复叠循环的切换点,计算结果表明,该机组在冬季较低的室外环境温度下能节能运行。

A cascade hea pump unit was developed to solve the winter application problems of conventional units in cold regions, e.g. , high compression ratio with low heating efficiency. The cascade heat pump unit functions in both single - stage cycle and cascade cycle by optimizing control conditions and maximizing energy- saving. Calculation results indicate that the unit works well with low energy consumption in winter.