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Release time:

2021-07-02

There are many kinds of refrigerants for high and low temperature refrigeration integrated machine, which are classified into single refrigerant and mixed refrigerant according to the composition of refrigerant. According to the chemical classification of refrigerant substances, there are mainly inorganic substances, Freon and hydrocarbon mixtures. According to the source of substances, there are natural refrigerants and synthetic refrigerants.

Refrigerant naming symbol with the letter ‘R’, the following numbers and letters are based on the chemical properties of refrigerant substances written in accordance with certain rules

The choice of refrigerant is mainly from three aspects: whether the refrigeration performance is good, whether it is practical, whether the substance has an adverse effect on the atmosphere

(1) refrigerant refrigeration performance depends on his work requirements, whether he has a satisfactory theoretical cycle and thermodynamic properties.

(2) For practical use, the refrigerant has good chemical and thermal stability, does not decompose or deteriorate during the refrigeration cycle, has no corrosion of mechanical equipment materials, and has no chemical reaction with lubricating oil. In addition, it is safe, non-toxic and harmless, with little flammability and explosiveness. In addition, a wide range of sources and low prices are also factors to consider

(3) Environmental acceptability. After the selection of refrigerant, according to its nature, the requirements of the refrigeration system process arrangement, structural design and operation to adapt to it. High and low temperature refrigeration machine these should be in full grasp of the nature of the refrigerant on the basis of proper handling.