The characteristics of the use of refrigerant in the freezer

Many freezer refrigerants have different characteristics. The biggest advantage of refrigerants is that they have zero potential for damaging the ozone layer and can meet environmental protection requirements. But on the other hand, refrigerants have small molecules, light molecular weights, strong permeability, and are very easy to absorb water and are not compatible with mineral oil. Therefore, the amount of refrigerant requires higher cleanliness in the compressor. At the same time, the use of R134a refrigeration mineral oil is not compatible.

Therefore, the amount of R134a refrigerant requires higher cleanliness in the compressor. The freezer also uses the fluorine-free R134a refrigerant and must use ester or new synthetic oil polyol lubricating oil. R134a is corrosive to metal parts. For this reason, the internal parts of the compressor of the fluorine-free machine have been specially treated. Moreover, R134a has higher standard boiling point, freezing point and latent heat of vaporization, and its cooling capacity is about 10% lower than that of R12 refrigerant. At present, there is still an important maintenance problem in the use and promotion of fluorine-free cabinets. Due to the lag in the market, not only special refrigerants, refrigeration oils, lubricating oils, filter driers and compressor parts are less and expensive, but fluorine-free requires high maintenance equipment and processes.

The fluorine-free machine using R134a refrigeration has high requirements for oil, water and impurities in the system pipeline, which is its inherent weakness. At the same time, its requirements for special sealing materials, drying treatments, and repair tools are also difficult for the technical equipment of Dingban repair shops. It is undeniable that R134a refrigerant is still an ideal substitute at present, but in the near future, it will be developed on the basis of it, which has no pollution and no negative effects, and is suitable for all-round alternative refrigerants. , Widely used in green cabinets.

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