Discusses the methods of improving the performance of air-cooled heat pump chiller under frosting conditions by making better the desing of evaporator of heat pump, enhancing the function of defrosting and improving the technique of defrosting control.

• 从改进风冷热泵冷热水机组风侧换热器设计、提高机组的除霜性能以及改进除霜控制等方面讨论了提高风冷热泵冷热水机组在结霜工况下工作性能的途径。