In the above, we talked about the reason why the lubricating oil enters the inside of the low temperature test chamber compressor. Now, what are the hazards of the lubricant?
The accumulation of oil inside the cryogenic test chamber refrigeration system not only reduces the working volume on the one hand, but also accumulates in the vicinity of the pipeline and valve with a small cross section due to the large viscosity of the oil, resulting in insufficient liquid supply or liquid supply pipeline. Blockage, cooling effect is significantly reduced. On the other hand, the thermal conductivity of oil is much smaller than that of metal. When attached to the wall of the low-temperature test chamber cooling equipment, the heat transfer will be deteriorated, the evaporation pressure will drop, and the exhaust temperature will rise, which will lead to the operating conditions of the refrigeration system. It deteriorates and the work efficiency is reduced. According to reports, the evaporator has a 0.1mm thick oil oath film. In order to maintain the predetermined low temperature requirement, the evaporation temperature will drop by 2.5 °C, and the power consumption will increase by 11%.
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