Alternative R-134A refrigerant for vehicle and preparation method of refrigerant

Abstract

The invention discloses an alternative R-134A refrigerant for a vehicle and a preparation method of the refrigerant. The refrigerant is prepared by mixing the following raw materials in parts by weight: 29-62 parts of difluoromethane, 32-58 parts of propylene and 10-40 parts of trifluoroiodomethane. The preparation method comprises the following steps: S1, detecting the purity of each raw material; S2, cleaning a pressure vessel by using a cleaning reagent; S3, vacuumizing the pressure vessel; S4, adding the raw materials reaching the standard into the pressure vessel in parts by weight and mixing so as to obtain the mixed materials; and S5, sampling the mixed materials in S4, and detecting whether the components in the materials meet the corresponding weight ratio. According to the alternative R-134A refrigerant for the vehicle, provided by the invention, no original refrigeration plant needs to be replaced, the refrigerant can be used without adjustment, the transformation cost is greatly saved, the energy-saving effect is excellent, and the energy is saved by 8-12% compared with the original R-134A refrigerant.

Description

technical field [0001] The invention belongs to the field of refrigerants, and in particular relates to a refrigerant replacing R-134A for vehicles and a preparation method thereof. Background technique [0002] Since the signing of the "Montreal Protocol", countries have launched research on energy-saving and environmentally friendly automotive refrigerants. During this period, the alternative refrigerants proposed are mainly for the purpose of protecting the ozone layer, and the development of HFCs refrigerants is one of the hot topics. But after the "Kyoto Protocol" was signed, people turned to focus on the protection of the ozone layer and the reduction of the greenhouse effect at the same time, not only requiring the ODP of the refrigerant to be zero, but also the GWP to be small. [0003] R461 not only has a very low GWP, but also is a new type of energy-saving, environmentally friendly and promising refrigerant among many automotive refrigerants. When the ternary mix...

AI Technical Summary

Problems solved by technology

Although R-134 does not destroy the ozone layer at all, its global warming potential value reaches / (GWP) 1300, it does not have environmental protection characteristics, and its energy consumption is relatively high during refrigeration operation, which cannot meet the current national requirements for advocating high-efficiency and energy-saving refrigeration refrigerants; and has Certain water solubility, so it is not good for the refrigeration system. When there is water, it will interact with lubricating oil, etc., and will produce acid, carbon dioxide or carbon monoxide, which will corrode the metal, so it has high requirements for the drying and cleaning of the refrigeration system.

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