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Time：2025-07-15 14:43:58 Reading volume：
Oil separator is a device used to separate lubricating oil or other oil substances from mixed media. It is commonly used in refrigeration systems, compressed air systems, fuel systems, etc. Its core function is to efficiently separate oil to ensure the pure operation of the system. The specific functions and applications are as follows:
1. Separation of oil and gas/liquid
- In refrigeration systems (such as air conditioners and cold storage), separate the high-pressure gaseous refrigerant discharged from the compressor from the mixed lubricating oil to prevent the lubricating oil from entering the condenser and evaporator and affecting the heat exchange efficiency.
- In compressed air systems, remove oil mist and liquid oil in compressed air to provide clean compressed air (such as industrial pneumatic tools and precision instrument air supply).
2. Recover lubricating oil
- Return the separated lubricating oil to the compressor or oil tank to reduce the consumption of lubricating oil and reduce operating costs.
3. Protect downstream equipment
- Prevent lubricating oil from contaminating heat exchangers, pipes, valves and other components, and avoid oil film adhesion that causes reduced heat transfer efficiency or equipment blockage.
4. Reduce emission pollution
- In the fuel system or exhaust gas treatment, oil separation can reduce the emission of oil substances and meet environmental protection requirements (such as ship exhaust gas treatment).
1. Refrigeration/air conditioning system
- Used on the exhaust side of screw compressors and scroll compressors to ensure that the oil content in the refrigerant is less than 1%, which is commonly found in central air conditioning and cold chain logistics equipment.
2. Air compressor system
- The oil-gas separator in compressed air post-treatment (such as a screw air compressor) has a separation accuracy of up to 0.1μm and outputs oil-free compressed air.
3. Fuel purification system
- Separate impurities and moisture in diesel/gasoline to protect engine injectors (such as ships and generator sets).
4. Industrial oil mist treatment
- The oil mist generated by machine tools and CNC machining centers is recovered after separation by centrifugation or filtration.
1. Mixed gas enters the separator: The high-temperature and high-pressure refrigerant and lubricating oil mixture is discharged from the compressor.
2. Deceleration and centrifugal separation: The oil droplets are separated from the gas due to density differences by expanding the flow channel or centrifugal force.
3. Filtration or adsorption: The built-in filter, baffle, or coalescing material captures tiny oil droplets.
4. Oil reflux: The separated oil accumulates at the bottom and returns to the compressor crankcase through the pressure difference or oil return hole.
1. Centrifugal separator: Uses rotating centrifugal force to separate oil (suitable for large flow systems).
2. Baffle/labyrinth separator: The airflow hits the baffle to change direction, and the oil droplets are separated due to inertia.
3. Coalescing separator: The fiber filter material adsorbs tiny oil mist, forming large oil droplets and then settles.
4. Electrostatic separator: A high-voltage electrostatic field absorbs oil mist (high-precision occasions).
- Regularly clean/ｒｅｐｌａｃｅ filter element: avoid oil blockage and an increase in pressure ｄｒｏｐ.
- Check the return oil pipeline: ensure that the separated oil can flow back smoothly.
- Monitor the pressure difference: Excessive pressure difference may indicate separator failure.
The lubricating oil separator is a key component to ensure efficient and long-life operation of the system. Its performance directly affects energy consumption and equipment reliability. When selecting, it is necessary to match the type according to the medium characteristics (viscosity, flow), separation accuracy requirements (such as refrigeration system needs ≤5ppm) and working environment.
