Parallel compression type CO2 automotive heat pump air conditioner system with regenerative device

Abstract

The invention discloses a parallel compression type CO2 automotive heat pump air conditioner system with a regenerative device. The parallel compression type CO2 automotive heat pump air conditioner system comprises two coaxially-connected parallel scroll compressors, a gas cooler, an outdoor heat exchanger, an intermediate heat exchanger, a gas-liquid separator, an evaporator and a liquid storagetank, wherein the output ends of the two scroll compressors are sequentially connected with the gas cooler, the outdoor heat exchanger, the intermediate heat exchanger and the gas-liquid separator, the gas-phase output end of the gas-liquid separator is connected with the input end of the second scroll compressor, the liquid-phase output end of the gas-liquid separator is connected with the evaporator and the liquid storage tank sequentially and connected with the input end of the first scroll compressor through the intermediate heat exchanger, the intermediate heat exchanger further cools ahigh-temperature refrigerant flowing out of the gas cooler while increasing the gas suction superheat degree, and the achieved effects are superimposed with the parallel compression effect to achieveperformance optimization. In a refrigeration mode of the parallel compression type CO2 automotive heat pump air conditioner system, the parallel compression scheme is adopted to solve the problem of efficiency attenuation of the CO2 refrigerant in the high-temperature environment and lower energy consumption.

Description

technical field [0001] The invention relates to a technology in the field of vehicle air conditioners, in particular to a parallel compression CO 2 Automotive heat pump air conditioning system. Background technique [0002] For heating in winter, compared with traditional internal combustion engine vehicles, electric vehicles have no engine waste heat that can be used, and heat pump technology is becoming more and more popular in electric vehicles. At present, the refrigerant commonly used in automotive air conditioners is R134a, but it has a very high GWP (Global Warming Potential), and its heating performance at low temperatures is very poor. It is particularly important to find suitable alternative refrigerants and heat pump technologies. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a parallel compression CO 2 The automotive heat pump air-conditioning system can switch between cooling an...

AI Technical Summary

Problems solved by technology

At present, the refrigerant commonly used in automotive air conditioners is R134a, but it has a very high GWP (Global Warming Potential) and has very poor heating performance at low temperatures. It is particularly important to find suitable alternative refrigerants and heat pump technologies

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