Environment friendly mixing refrigerant for air conditioner

Abstract

The invention relates to an environment-friendly mixed refrigerant for an air conditioner. The refrigerant comprises the following compositions according to mass percentage: 10 to 40 percent of dimethyl ether, 55 to 85 percent of propylene and 5 to 35 percent of 1, 1, 1, 2, 3, 3, 3-heptafluoropropane. The refrigerant has superior environmental performance; the value of ODP is zero; the value of GWP is far less than R22 and R407C; under the conditions of standard working condition and variable working condition; the refrigerating capacity of the refrigerant in unit volume is equal to the COP value and R22, which is quite suitable for direct charging and filling by a compressor; the slipping temperature of the refrigerant is only 0.42 DEG C which is far less than R407C and is close to the temperature of an approximate azeotrope, thereby removing the adverse influence caused by the large slipping temperature; and the air exhaust temperature of the refrigerant is the lowest and is favorable for protecting the refrigeration compressor. The environment-friendly mixed refrigerant can be used as a perfect refrigerant for substituting R22 in the domestic air conditioner.

Description

technical field [0001] The invention belongs to the field of refrigerants, and relates to a mixed refrigerant, in particular to an environmentally friendly air-conditioning mixed refrigerant used in domestic air-conditioning systems to replace R22. Background technique [0002] R22 has the advantages of non-flammability, non-toxicity, non-corrosion and excellent thermal performance. It is widely used in household air conditioners and other refrigeration fields. Restrictions, especially the former stipulate that developed countries can use R22 until 2020, existing equipment can be used until 2030, and developing countries are allowed to use it until 2040. In this form, countries all over the world are working on the replacement of R22 refrigerant. [0003] At present, there are mainly two technical solutions for the replacement of air-conditioning refrigerant R22 in the world: one is represented by Germany and some Nordic countries, which advocate the use of natural working ...

AI Technical Summary

Problems solved by technology

The above two studies show that DME / HCs mixed refrigerants have good thermodynamic properties and environmental performance, but because DME and HFs have certain flammability, they have not given sufficient consideration to safety performance, and need to add Moderate amount of flame retardant for safety

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