POE (Polyol Ester) refrigeration oil, that is, polyol ester refrigeration oil. The following is an introduction to it:
- Chemical composition: POE oil is a synthetic lubricant made by esterification reaction of polyol and fatty acid 1.
Physical properties
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Viscosity characteristics: It has a low viscosity temperature coefficient and can maintain relatively stable viscosity at different temperatures to ensure sufficient oil film strength at high temperatures and good fluidity at low temperatures 1.
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Hygroscopicity: POE oil has strong hygroscopicity and is easy to absorb moisture in the air when in contact with it 5.
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Solubility: It has good compatibility and solubility with HFC (hydrofluorocarbon) refrigerants such as R-134a and R-410a 246.
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Superior lubrication performance: It can form a firm and uniform oil film on the metal surface, effectively reducing friction loss of components such as compressors during operation and prolonging the service life of equipment 12.
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Good thermal stability: In high temperature environments, POE oil is not easy to undergo chemical reactions such as oxidation and decomposition, and is not easy to produce carbon deposits and rubber films, which can ensure the stable operation of the refrigeration system under high temperature conditions 124.
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Excellent low-temperature fluidity: Even at very low temperatures, it can still maintain good fluidity, so that when the refrigeration system starts and operates at low temperatures, the refrigeration oil can quickly reach each lubrication part to ensure the normal operation of the system 24.
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Better environmental protection performance: POE oil can be naturally decomposed in nature and has less pollution to the environment, meeting environmental protection requirements 2.
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Household and commercial air conditioners: Such as common split air conditioners and central air conditioning systems, POE oil can provide good lubrication and heat dissipation for air conditioning compressors and ensure the efficient and stable operation of air conditioners 2.
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Industrial refrigeration equipment: Like cold storage, water chillers, industrial freeze drying equipment, etc., POE oil can adapt to complex working conditions such as low temperature and high pressure and ensure the reliability and operating efficiency of equipment 2.
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Automotive air conditioning systems: During vehicle driving, whether in high temperature environments or low temperature starts, POE oil can provide reliable lubrication and protection for automotive air conditioning compressors 2.
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Prevent moisture intrusion: Due to the hygroscopicity of POE oil, it should be strictly sealed during storage and use, and the contact time with air should be minimized. When repairing the refrigeration system, the operation should be completed as soon as possible and the drying filter should be replaced in time 5.
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High system cleaning requirements: POE oil has strong solubility and will dissolve or loosen impurities and dirt in the system, which may lead to filter blockage or component wear. Therefore, before using POE oil, the refrigeration system needs to be thoroughly cleaned and dried.
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Avoid mixing: POE oil generally cannot be mixed with other types of refrigeration oils such as mineral oil, otherwise its performance may be affected and even lead to refrigeration system failure.
