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以多联机空气源热泵相变蓄能除霜系统为研究对象,采用实验研究的方法分别对采用翅片管型和螺旋盘管型相变蓄能器的多联机空气源热泵系统的除霜性能进行实验研究。研究结果表明,室内机全负荷状态下,相变蓄能器在供热过程中蓄热,螺旋盘管型蓄能器与翅片型蓄能器完成蓄热分别需要6.00和33.00 min。从整个供热周期来看,翅片型蓄能器对供热过程的影响更小,蓄热过程会引起室内平均进出风温差降低4℃、平均供热量降低6 k W,系统结霜时间缩短8 min。
The multi-on-line air-source heat pump phase-change energy storage defrosting system is taken as the research object. Experimental studies are performed on the defrosting performance of the multi-connected air source heat pump system using fin-and spiral coil phase change energy accumulators Conduct experimental research. The results show that when the indoor unit is fully loaded, the phase change accumulator accumulates heat in the process of heating, and the spiral coil accumulator and the fin type accumulator complete the heat storage respectively requiring 6.00 and 33.00 min. From the perspective of the entire heating cycle, the fin-type accumulator has less influence on the heating process. The heat storage process will result in a 4 ° C lower average indoor air temperature difference and a 6 k W lower average heating amount. The system frost time Shorten 8 min.