An energy-saving and environment-friendly mixed refrigerant with a temperature application range of -17°C to -42°C

Abstract

The invention discloses an energy-saving and environment-friendly mixed refrigerant with a temperature application range of -17°C to -42°C. The mixed refrigerant is formed by mixing 91.83wt% of R218 and 8.17wt% of R846. The benefits of the present invention are: (1) when the mixed refrigerant is used to replace CFC, not only the heating performance of the system can be significantly improved, but also there is no need to make substantial changes to the structure of existing equipment; (2) the mixed refrigerant It is a non-azeotropic mixed refrigerant, and there is a temperature glide during the phase change process, which is conducive to improving the efficiency of the heat pump cycle and refrigeration cycle, and is very suitable for the application of variable temperature heat sources; (3) After adding R846, the R218 can be increased Oil-soluble, which reduces the possibility of the mixed refrigerant leaking in the equipment to a certain extent; (4) The ODP value of the mixed refrigerant is 0, and has no effect on the ozone layer of the atmosphere; (5) The mixed refrigerant can be used widely Used in 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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