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通过对一台风冷热泵冷热水机组除霜时使用热力膨胀阀和使用短管直接连通机组高低压侧的对比实验， 研究了不同节流装置对机组除霜性能的影响， 提出了改进风冷热泵冷热水机组除霜性能的一种方法。
The effect of different throttling devices on the defrosting performance of the unit was studied by comparing the use of a thermal expansion valve with a thermostatic expansion valve in the defrosting of an air-cooled heat pump water heater / chiller unit and the use of a short pipe to communicate directly with the high and low pressure sides of the unit. A Method for Defrosting Performance of Cold Heat Pump Chiller.