It has been known that for space heating ASHPs, different operations and configurations can influence their frosting suppression performances. However, the practical applications through varying the operations and configurations of ASHPs for frosting suppression has not been well documented. Therefore, in this paper, field investigations on frosting suppression for variable-capacity ASHPs through optimizing their operations and configurations are reported. The investigations were based on two multi-compressor ASHPs of the same size, one being conventional, and the other being optimized, with respect to their operations and configurations. The outdoor airflow rate and the surface area of outdoor coils of the optimized ASHP were twice as much as those of the conventional ASHP. By comparing the field measured results from the optimized ASHP with those from the conventional ASHP, it could be found that for the optimized ASHP, its frosting rate and frosting-defrosting loss efficiency could be reduced by 37.2% to 39.6%, and 31% to 34.2%, and its operating performances improved by 5% to 22%, respectively. Therefore, optimizing the operations and configurations of ASHPs would have significant potential for improving their frosting suppression performances, and consequently their actual operating performances under part-load conditions.

众所周知，对于空间加热的ASHP，不同的操作和配置会影响其结霜抑制性能。但是，通过改变ASHP的操作和配置来抑制结霜的实际应用尚未充分记录。因此，本文报道了通过优化操作和配置对变容量ASHP进行结霜抑制的现场调查。研究基于两个相同大小的多压缩机ASHP，其中一个是常规的，另一个是针对其操作和配置进行了优化的。优化的ASHP的室外空气流量和室外盘管的表面积是传统ASHP的两倍。通过将优化后的ASHP与常规ASHP的现场测量结果进行比较，可以发现，对于优化后的ASHP，其结霜率和除霜除霜损失效率可以降低37.2％，降至39.6％，降低31％。 34.2％，其运营绩效分别提高了5％至22％。因此，优化ASHP的运行和配置将具有巨大的潜力，可以改善其结霜抑制性能，从而提高其在部分负荷条件下的实际运行性能。