Vapor compression assisted undercooling CO2 automotive air conditioning system

Abstract

The invention discloses a vapor compression assisted undercooling CO2 automotive air conditioning system. The vapor compression assisted undercooling CO2 automotive air conditioning system comprises a non-azeotropic mixture vapor compression assisted refrigerating system and a CO2 transcritical refrigerating system; the non-azeotropic mixture vapor compression assisted refrigerating system is composed of an assisting system compressor, an undercooler, a throttle valve and the condenser which are sequentially connected; the CO2 transcritical refrigerating system is composed of a main circulating compressor, a gas cooler, an undercooler, a throttle valve and an evaporator which are sequentially connected. According to the vapor compression assisted undercooling CO2 automotive air conditioning system, refrigerant at the outlet of the gas cooler is undercooled through assisted circulation, CO2 at the outlet of the gas cooler can be cooled through low-capacity assisted circulation, the cooling process is easy to implement, the temperature of the CO2 can be reduced below ambient temperature, and irreversible loss during a high-pressure CO2 throttling process can be significantly reduced.

Description

technical field [0001] The invention relates to the technology of environmentally friendly refrigerants and the field of refrigeration and air conditioning, in particular to a non-azeotropic mixed refrigerant vapor compression assisted supercooled CO 2 Transcritical refrigeration cycle automotive air conditioning refrigeration system. Background technique [0002] With the rapid development of our country's economy and the continuous improvement of people's living standards, the number of cars in our country is increasing day by day. At present, the automobile air-conditioning refrigeration system is mainly based on the neat compression refrigeration cycle, and generally adopts the vapor compression refrigeration unit, which is composed of a refrigeration compressor, a condenser, a throttle valve and an evaporator. [0003] Under the current dual pressure of environmental protection and energy saving, the development of green refrigerants is the general trend. Nowadays, en...

AI Technical Summary

Problems solved by technology

However, due to CO 2 The critical temperature is only 31.1°C, and the critical pressure is as high as 7.38MPa. Its operating pressure is high and the throttling loss is large, resulting in CO 2 The efficiency of transcritical cycle is lower than that of conventional refrigerant system, which is the main reason to limit its popularization and application

Images