中文摘要：

本文利用新改进的表面张力实验系统对R600a／矿物冷冻油混合物的表面张力进行了实验研究，其中R600a的质量分数分别为O．95、0．90和0．85，温度范围为253．15-333．15K。实验结果表明，随着含油量的增加，R600a／矿物冷冻油的表面张力逐渐减小，矿物油的存在对纯质制冷剂的表面张力有比较明显的影响。

英文摘要：

The surface tension of R600a（1） ＋mineral refrigerant oil （2） binary mixture was measured at three nominal mass fractions of w（1）= 0.95, 0.90 and 0.85 over the temperature range from 253.15 to 333.15 K by using the surface tension experimental system of new improvement. The results shows that, with the increase of oil, the surface tension of R600a＋mineral refrigerant oil binary mixture has been gradually decreased, and the existence of mineral refrigerant oil greatly influences the surface tension of pure refrigerant.