【摘要】 空气源热泵在制热运行时室外机换热器会结霜，影响换热能力进而导致室内机供热能力差、舒适性降低的问题。为了解决这一问题，文章对3种新型空气源热泵抑霜方法进行了试验研究，包括：降频抑霜、热气旁通抑霜以及热气旁通联合降频抑霜。研究结果表明，这3种方法均能有效抑霜，延长制热时间。其中，降频抑霜和热气旁通联合降频抑霜方法整机功率下降较为明显，制热能力损失较多。相比之下，热气旁通抑霜方法的整机功率下降较少，制热能力损失相对较少，特别是当热气旁通抑霜方法采用较大开度时，其制热能力和制热时长均优于降频抑霜方法。综合来看，热气旁通抑霜可以有效延长制热时长(45%),同时制热能力仅降低约5.7%,是较为理想的空气源热泵抑霜方法。更多还原

【Abstract】 During the heating operation of air source heat pumps, frost formation on the outdoor unit’s heat exchanger can affect its heat exchange capacity, thereby leading to poor heating capacity of the indoor unit and reduced comfort. To address this issue, experimental research on three new types of frost suppression methods for air-source heat pumps is conducted, including frequency reduction, hot gas bypass, and a combination of hot gas bypass and frequency reduction. The research results indicate that all three methods can effectively suppress frost and extend the heating duration. Among them, the frequency reduction method and the combined hot gas bypass and frequency reduction meth-od show a significant decrease in overall power consumption, with a considerable loss of heating capacity. In contrast, the hot gas bypass method results in less of a decrease in overall power consumption and relatively less loss of heating capacity. Especially when the hot gas bypass method is used with a larger opening degree, heating capacity and duration are both superior to the frequency reduction method. Overall, the hot gas bypass defrosting can effectively extend the heating duration by 45%, while the heating capacity is only reduced by about 5.7%, making it an ideal defrosting method for air source heat pumps.更多还原