分析热力膨胀阀和蒸发器调节系统的稳定性，它直接影响着制冷效率和运行安全。
This paper describes the stability of control loop consisting of refrigeration evaporator and thermostatic expansion valve. It may directly influence refrigerating efficiency and operation safety.
本文建立了直接膨胀式太阳能热泵(直膨式太阳能热泵)系统的实验装置。
The experimental setup of the direct expansion solar-assisted heat pump (DX-SAHP) system was constructed.
并与直接膨胀供液制冷系统做同工况下的对比实验，分析两种系统的工作特性差异。
Contrast experiments between gravity feeding and direct expansion refrigeration system were carried on, performance characteristics difference of the two refrigeration systems were found out.
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