空气源热泵除霜控制方法研究现状及展望

空气源热泵在除霜过程中"误除霜"故障时有发生,"有霜不除"会导致机组制热能力和性能下降,"无霜除霜"会导致系统供热量损失,因此空气源热泵在除霜时最佳除霜起止点的判定尤为重要.除霜控制是通过选择恰当的除霜切入点和结束点,使除霜周期内空气源热泵系统稳定性好、节能以及能保证室内的热舒适.本文通过总结国内外学者对除霜控制方法的...

Research Status and Prospect on Defrosting Control Method of Air Source Heat Pump

The mal-defrosting phenomenon occurs frequently when the air source heat pump (ASHP) is defrosting, which causes a decline in the heating capacity, performance, and heating loss. Therefore, it is crucial to determine the most appropriate start and end times. To control the start and end time of defrosting properly, the ASHP has a state of stable performance and energy saving and can ensure thermal comfort in the room during defrosting. In this study, the research on defrosting control methods at home and abroad are summarized, and the limitations of defrosting control methods are analyzed, including measuring the frost thickness directly, monitoring the frost degree indirectly, and determining the start and end times using an intelligent algorithm. The idea of a combination of frost suppression technology and a defrosting control method, the relationship between the type of equipment and defrosting control method, as well as an evaluation system for defrosting control methods were put forward as the future research direction in this paper.