With the implementation of the Montreal Protocol and the promotion and implementation of relevant national policies, the application of new environment-friendly refrigerants is in a rapid growth stage, and the demand for matching synthetic lubricants and base oils is bound to witness explosive growth. POE ester (polyol ester) series products are lubricating oil base oil for air conditioning compressor, which are widely used in air conditioning compressor of household, automotive and large air conditioning units. They have good compatibility and matching performance with the new generation of green environmental protection refrigerant, improve viscosity-temperature property and viscosity index, and are currently in short supply. The company invested 600 million yuan in March 2018 to establish a 30000t/a polyol ester refrigerator oil production line, aiming to establish a national brand of refrigerator oil. The company's existing polyol ester refrigerant oil products cover R134a, R404, R407, R410, R507 and R32 refrigerant compressor systems.