Feature 1: The use of integrated double spiral guide design, make the centrifugal separation of mixed gaseous refrigerant more smooth, improve oil efficiency; 2: the bottom of the spiral piece is equipped with a butterfly oil drop drainage ring design, the collected oil drops are isolated and discharged into the oil drop collection room; 3: In order to prevent the gas refrigerant from flowing too fast in the chamber of the oil separator to disperse the collected oil droplets, a partition is added between the chambers to effectively isolate the flow. 4: Under the condition of not reducing flow loss, the bottom of the diversion tube is added with a bucket secondary filter screen, which can effectively filter more than 40um impurities; 5: the bottom of the floating ball is equipped with a magnet, which can absorb iron particles into the oil separator.