Environmental protection type refrigerant for replacement of CFC-12

Abstract

The invention discloses an environment-friendly refrigerant replacing CFC-12. The refrigerant contains three components of fluoroethane (HFC-161), 1,1-difluoroethane (HFC-152a) and 1,1,1,2-tetrafluoroethane (HFC-134a). Its mass percentage is: HFC-161: 1%-50%; HFC-152a: 1%-50%; HFC-134a: 30%-90%. The ODP value of this refrigerant is zero, and it does not destroy the atmospheric ozone layer. Compared with CFC-12 and its existing main substitute HFC-134a, the GWP value is smaller, and it is more in line with the requirements of environmental protection. The working pressure and pressure ratio of this refrigerant are similar to that of HFC-134a, the main substitute of CFC-12. Under the premise of basically not changing the main components of the system, it can be directly used in the system that originally used HFC-134a, and it can reduce the charge. Filling volume. This refrigerant can be used as a long-term substitute for CFC-12.

Description

technical field [0001] The invention relates to a refrigerant, in particular to an environment-friendly refrigerant replacing CFC-12. technical background [0002] Among chlorofluorocarbon (CFC) refrigerants, CFC-12 has long been widely used in automotive air conditioners, household refrigerators and industrial cold storage due to its excellent thermal performance, stable chemical performance, non-toxicity, and non-flammability. [0003] However, because CFC-12 has a certain destructive effect on the ozone layer in the atmospheric stratosphere, its ODP (Ozone Depletion Potential) value is 0.90 (with CFC-11 as the benchmark value of 1.0), so "About Ozone Depletion The Montreal Protocol on Substances includes it as the first batch of substances to be phased out. At present, developed countries have stopped the production of CFC-12, and our country is also reducing its production and use year by year, and finally stopped production and use in additio...

AI Technical Summary

Problems solved by technology

However, HFC-134a has a serious environmental problem, that is, the greenhouse effect on the earth. Its global warming potential GWP (Global Warming Potential) value is 1300 (with CO2 as the benchmark value of 1.0), and the global warming effect is relatively large.

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