Energy-saving and environment-friendly mixed refrigerant with temperature application range of -17 to -42 DEG C

Abstract

The invention discloses an energy-saving and environment-friendly mixed refrigerant with a temperature application range of -17 to -42 DEG C. The mixed refrigerant is formed by mixing 91.83 wt% of R218 and 8.17 wt% of R846. The mixed refrigerant has the following advantages: (1) when the mixed refrigerant is used for replacing CFC, the heating performance of a system can be remarkably improved, and the structure of existing equipment does not need to be substantially changed; (2) the mixed refrigerant is a non-azeotropic mixed refrigerant, temperature slippage exists in the phase change process, the efficiency of heat pump circulation and refrigeration circulation can be improved, and the mixed refrigerant is very suitable for being applied to a variable-temperature heat source; (3) the R846 is added, so the oil solubility of the R218 can be improved, and the possibility of leakage of the mixed refrigerant in equipment is reduced to a certain extent; (4) the ODP value of the mixed refrigerant is 0, and the mixed refrigerant has no destructive effect on the ozone layer of the atmosphere; and (5) the mixed refrigerant can be widely applied to heat pumps, air conditioners and refrigeration equipment.

Description

technical field [0001] The invention relates to a refrigerant, in particular to an energy-saving and environment-friendly mixed refrigerant with a temperature application range of -17°C to -42°C, belonging to the technical field of heat pumps and refrigeration. Background technique [0002] In the field of heat pumps and refrigeration, refrigerants are essential. With the increasing demand for air conditioners, refrigerators and other equipment, the demand for refrigerants is also growing rapidly. There are various types of refrigerants with their own characteristics, and their selection has an important impact on the environment. Both the Montreal Protocol and the Kyoto Protocol have specified the destructive effect of Freon on the ozone layer and its impact on the greenhouse effect, and have made corresponding regulations on the emissions of ozone-depleting substances (such as chlorofluorocarbons) and carbon dioxide emissions. . Internationally, more and more attention h...

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Problems solved by technology

[0005] (2) R134a is a substitute for R12 (excellent thermal performance, but relatively poor environmental protection performance, which has been eliminated), but the cost of R134a product itself is high, and when using this product to replace R12, it is necessary to vigorously transform the original R12 equipment, resulting in an increase in the cost of the entire refrigeration equipment, a great waste of resources, and the future development trend of R134a will also be eliminated;

[0007] (4) The ODP values ​​of R290 and R600a are both 0 and the GWP values ​​are 20. They are the most environmentally friendly refrigerants today and are compatible with traditional lubricating oils. However, due to the flammability of R290 and R600a, they are usually It is only used in equipment with a small liquid charge, or as a component of low-temperature mixed refrigerant;

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