Environment-friendly refrigerant and preparation method thereof

Abstract

The invention discloses an environment-friendly refrigerant and a preparation method thereof, wherein the refrigerant is prepared from the following components in percentage by weight: 40%-90% of difluoromethane, 5%-40% of 1, 1-difluoroethane and 5%-50% of 1, 1, 2, 2- tetrafluoroethane. The specific volume of saturated liquid of the environment-friendly refrigerant prepared by the method of the invention is larger, and the charge of the refrigerant in a refrigerating system can be greatly reduced, i.e. the GWP (global warming potential) of the refrigerant is reduced, and at the same time, the burning possibility of combustibles after the refrigerant leaks is reduced; the refrigerating capacity per unit volume is larger, the size of a compressor can be reduced, and the cost of a refrigerating system is reduced; and the refrigerant has a good environmental performance, ODP (ozone depression potential) is 0, GWP is greatly reduced relative to HCFC-22 and R-410A.

Description

Technical field [0001] The invention relates to a refrigerant, in particular to an environment-friendly refrigerant and a preparation method thereof. Background technique [0002] Since HCFC-22 (difluoromonochloromethane) has a certain ODP (ozone depletion potential) and a high GWP (global warming potential), it is a substance that is required to be eliminated within a time limit, and the existing main substitute R -407C (a mixture of 1,1,1,2-tetrafluoroethane, pentafluoroethane and difluoromethane), R-410A (a mixture of difluoromethane and pentafluoroethane), etc. have certain defects in themselves , The refrigeration performance can not meet the requirements, and the environmental performance is not ideal, the GWP is relatively high, even higher than HCFC-22. [0003] HFC-32 (difluoromethane) has good thermal performance, ODP is 0, GWP is 716, and it has excellent environmental performance. Although it has certain flammability, it is not very flammable and belongs to the A2L ref...

AI Technical Summary

Problems solved by technology

[0008] The refrigerant compositions disclosed in the above-mentioned patents have disadvantages such as high GWP values, inability to be directly filled and applied to HFC-134a systems, or high flammability. Therefore, it is necessary to develop New refrigerants with better compatibility and better environmental performance

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