制冷热泵装置毛细管组件及其应用特性研究

摘要

A new type of capillary tube combination unit was studied,which enabled more flexible refrigerant flowing than traditional capillary tubes. With a homogeneous-phase model,the refrigerant flowing rate of the capillary tube combination unit and that of the traditional capillary tube were calculated and compared at different parameters and working modes. The results indicated that the capillary tube combination unit met the refrigerant flowing needs much better in refrigerators&heat pumps. An experimental R22 refrigerator&heat pump was built with a capillary tube combination unit,and its performance was experimentally studied. The study showed that the capillary tube combination unit could match the cooling or heating load under typical toorking conditions,and it could provide different refrigerant flowing rates for cooling and heating modes at given inlet and outlet parameters.%研究一种新型结构的毛细管组件，可克服传统毛细管流量变化单一的缺点，并通过优化设计其结构，使其具有较灵活的流量变化特性。采用均相流模型，对普通毛细管与毛细管组件在变工况、变工作模式下的流量变化规律进行了对比计算。计算表明，毛细管组件可较好地满足制冷热泵装置流量变化的需求。建立R22制冷热泵实验装置，对毛细管组件的应用特性进行了实验研究。结果表明，在典型工况下，当制冷负荷和制热负荷不同时，毛细管组件能提供不同的制冷剂流量，与相应的冷热负荷相匹配。