Electric car heat pump air conditioning system

Abstract

The invention provides an electric car heat pump air conditioning system. The air conditioning system includes a compressor with middle gas compensation, an external heat exchanger, an internal condenser, an internal evaporator, a battery cooler and a gas compensation module, wherein an outlet of the compressor is connected with a first port of the external heat exchanger and an input end of the internal condenser, an inlet of the compressor is connected with the output end of a gas-liquid separator, the input end of the gas-liquid separator is connected with the first port of the external heat exchanger and the output end of the internal evaporator respectively, a high-pressure output end of the gas compensation module is connected with a second port of the external heat exchanger and the input end of the internal evaporator respectively, and a gas compensation output end of the gas compensation module is connected with a middle gas compensation mouth of the compressor. The electric car heat pump air conditioning system can be adapted to low temperature working conditions, the effect that the refrigeration mode and the heating mode share the same liquid storage is achieved, and subdivision functions of refrigeration, dehumidification and heating dehumidification can be achieved, and defrosting and battery waste heat recovery of part of heating operating conditions are achieved.

Description

technical field [0001] The present invention relates to a technology in the field of heat pump air conditioners, specifically a heat pump air conditioner system for electric vehicles that meets the needs of electric vehicles for refrigeration, heating, defrosting, cooling and dehumidification, and heating and dehumidification, and has the function of recovering battery waste heat. Air supply technology in the middle of the machine realizes low-temperature heating. Background technique [0002] Electric vehicles use on-board batteries as the power source, which have the characteristics of energy saving and environmental protection, and have broad development prospects. However, the heating problem of electric vehicles in winter and the reduction of endurance caused by them restrict their development. Traditional vehicles use engine coolant to heat the interior of the vehicle in winter, while electric vehicles rely on battery waste heat alone to meet the heating requirements ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defect that the existing technology cannot take into account both battery cooling and battery waste heat utilization, the present invention proposes a heat pump air-conditioning system for electric vehicles, which makes the heat pump system adapt to low-temperature working conditions through air supplementation in the middle of the compressor; through the cooling mode condenser and internal The condensers are connected in parallel to share the same liquid receiver in cooling mode and heating mode, and subdivided functions such as cooling and heating dehumidification can be realized; through the parallel connection of internal evaporator and battery cooler, defrosting and even partial heating can be realized battery waste heat recovery

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