| 摘要 |
<p>Provided is a refrigerator oil composition comprising a refrigerant that comprises carbon dioxide (CO 2 ) as the essential component, and an ester-based lubricating oil composition; wherein the ratio of refrigerant/lubricating oil composition falls between 99/1 and 10/90 by weight, and wherein the ester-based lubricating oil composition comprises a base oil that comprises an ester oil as the essential component, and wherein when the refrigerator oil composition has a refrigerant content of 90% and an oil content of 10%, the refrigeration oil composition has a two-layer separating temperature of the higher temperature component, in which the refrigerator oil composition separates into two layers, of not lower than 5°C.</p> |
