Heat pump air conditioning system for electric vehicle

Abstract

The invention discloses a heat pump air conditioning system for an electric vehicle. The system comprises a heat pump circulation system and an in-vehicle air conditioning system; the heat pump circulation system comprises a compressor, an external heat exchanger, an air-liquid separating device with back heat, an expansion valve for heating, an expansion valve for refrigerating, a refrigerating heat regenerator, a high-pressure three-way switching valve, a low-pressure three-way switching valve, a compressor intercooler, an evaporator and a condenser; the in-vehicle air conditioning system comprises an air supply duct for supplying air into the vehicle, a fresh air inlet and a return air inlet are formed in the inlet of the air supply duct, and fresh and return air adjusting valves are arranged at the fresh air inlet and the return air inlet; a fan is arranged in the air supply duct. The compressor is a double stage compressor connected with an the intercooler, a spraying nozzle is arranged on the compressor intercooler, condensed water generated by using the in-vehicle evaporator when refrigerating is conducted is evaporated through the spraying nozzle, and the performance of theheat pump air conditioning system is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a heat pump air conditioning system for electric vehicles. Background technique [0002] As an important solution for energy-saving and environment-friendly electric vehicle heating and cooling integrated air conditioner, air source heat pump technology has become a research hotspot in the electric vehicle industry. [0003] The current electric vehicle heat pump air conditioning system usually adopts such as figure 1 In the shown configuration process, the cooling and heating cycles are realized through the high-pressure three-way switching valve 10 and the low-pressure three-way switching valve 11 . Refrigeration cycle: the ac ends of the high-pressure three-way switching valve 10 and the low-pressure three-way switching valve 11 in the system are connected, and the ab ends are closed. The working fluid is compressed by the compressor 1 into a high-temperature and hi...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of insufficient performance of the electric vehicle air-conditioning system in high-temperature environment and low-temperature environment, the invention provides a heat pump air-conditioning system for electric vehicles, which uses the cooling capacity of the ambient air and the condensed water of the evaporator to perform intermediate cooling on the compressed gas of the compressor , and through the setting of the refrigeration regenerator, the exhaust temperature of the compressor is reduced and the system performance is improved

Images