The mineral nano-CuO refrigeration oil had been prepared. Saturated vapor pressure of pure HFC134a and three kinds of mixtures of HFC134a separately with pure mineral refrigeration oil, mineral nano-CuO refrigeration oil and POE refrigeration oil had been measured by using a set of high-precision fluid thermo-physical properties measurement system. The test results show that the relative deviation of the saturated vapor pressure of the HFC134a ranged from −0.02% to 0.70%, when mixed with 7.7%(w/w) nano-CuO refrigeration oil, and the average deviation was 0.33%; when 7.7% POE was mixed, relative deviation varied from 0.10% to −2.20%,and the average, 1.38%.

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