空气源热泵除霜控制方法研究现状及展望

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.