Refrigerant for refrigerating system low-temperature loop

Abstract

The invention discloses a freezing agent of low-temperature circuit, which is characterized by the following: allocating raw material with 60-75% carbon dioxide and 25-40% propane; reducing coagulating point temperature and low-temperature saturated pressure of CO2 as well as combustibility and boiling-point temperature of propane (R290).

Description

technical field [0001] The invention relates to a low-temperature refrigerant. Background technique [0002] Chlorotrifluoromethane (R13)-based industrial refrigerants are very damaging to the environment, and have been discontinued in developed countries, and will be discontinued in 2010 in developing countries. Its currently commonly used alternative refrigerant trifluoromethane (R23), a mixture of trifluoromethane and hexafluoroethane (R508b) with a mixing ratio of 46 / 54, has a relatively large greenhouse effect and a relatively large global warming effect, and the price Expensive and other deficiencies, in use, it is also found that the above-mentioned refrigerants also damage the exhaust valve and piston rod of the compressor, and decompose the lubricating oil, causing problems such as short circuit of the motor coil. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a low-cost, enviro...

AI Technical Summary

Problems solved by technology

Its currently commonly used alternative refrigerant trifluoromethane (R23), a mixture of trifluoromethane and hexafluoroethane (R508b) with a mixing ratio of 46 / 54, has a relatively large greenhouse effect and a relatively large global warming effect, and the price Expensive and other disadvantages. During use, it is also found that the above-mentioned refrigerants still have problems such as damaging the exhaust valve and piston rod of the compressor, decomposing lubricating oil, and causing short circuits in the motor coils.

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