新型PVE油对R32分体式空调性能的影响
Effect of New PVE Oil on the Performance of Air Conditioner with R32

R32作为新一代替代制冷剂的应用范围很广，专用冷冻机油的开发和使用成为R32应用的关键问题之一。本文选取了一种新型PVE油搭配R32，通过实验对比R410A/POE油、R32/POE油以及R32/PVE油组合时2匹热泵分体式空调的制冷性能，研究了不同PVE油含油率下的空调蒸发器及冷凝器侧热阻的变化，PVE油量影响系统COP的原因。结果表明：PVE油的使用明显提升了R32空调的制冷性能，随着油量的增加，蒸发器侧热阻先增大后减小，冷凝器侧热阻逐渐增大，从而影响蒸发温度先升高后降低，冷凝温度持续上升，系统COP先增大后减小，在PVE充注油量270 mL附近达到最大值。
The application range of R32, a new alternative refrigerant, is continually increasing. The development and use of a special refrigeration oil has become one of the key issues in R32 applications. This study investigated a new type of polyvinylether (PVE) oil pairing with the R32 refrigerant. Through an experimental comparison of the refrigeration performance of a split air conditioner, which is heat-pump type and the input power is 2 HP, with R410A/polyolester (POE), R32/POE, and R32/PVE, the thermal-resistance change of the evaporator and condenser under different PVE oil contents and how the system coefficient of performance (COP) was affected by the PVE oil content were studied. The results show that when R32 is paired with a more mutually soluble PVE oil, the refrigeration performance is improved effectively. With the increase in PVE oil content, the thermal resistance of the evaporator first increases and then decreases, and the thermal resistance of the condenser gradually increases; thus, the evaporation temperature first increases and then decreases, and the condensing temperature increases continuously. The COP increases and then decreases with the increase of the PVE oil content, reaching a maximum in the vicinity of 270 mL