带储液气液分离器的空气源热泵除霜系统研究

空气源热泵在冬季供热时室外蒸发器表面容易结霜,逆循环除霜作为最常用的一种除霜方法存在除霜带液和除霜时间长的问题.为提升逆循环除霜的空气源热泵系统性能,本文提出一种耦合储液气液分离器的空气源热泵除霜系统,该系统相比于传统的空气源热泵系统能够有效延缓结霜和缩短除霜时间.本文通过实验对比研究了6个工况下该系统和传统空气源热泵...

Research on Defrosting System of Air-source Heat Pump with Liquid Storage Gas-liquid Separator

The surface of an outdoor evaporator can easily frost when an air-source heat pump is used for heating during winter. The most common defrosting method, reverse cycle defrosting, has safety risk and long defrosting period. To improve the performance of an air-source heat pump system with reverse-cycle defrosting, a defrosting system consisting of an air-source heat pump coupled with a liquid storage gas-liquid separator is proposed in this paper. Compared with traditional air-source heat pump systems, this system can effectively delay frosting and shorten defrosting period. In this study, the thermodynamic performances of an air-source heat pump system and a traditional air-source heat pump system under six working conditions were studied experimentally. The experimental results show that the system can effectively delay frosting and shorten the defrosting period in a heating-defrosting-recovery cycle; the maximum defrosting time can be delayed by 53 min, and the maximum defrosting period can be shortened by 75 s.