Heat pump type car air conditioning system suitable for high-power fast charging working conditions

Abstract

The invention discloses a heat pump type car air conditioning system suitable for high-power fast charging working conditions. The heat pump type car air conditioning system comprise an in-car refrigerating circuit which is configured to enable a refrigerant to circulate and flow through a compressor, an out-of-car heat exchanger, an electronic expansion valve, an evaporator and a gas-liquid separator, and further includes a heat pump in-car heating circuit which is configured to enable the refrigerant to flow according to the sequence of the compressor, a plate heat exchanger, the electronicexpansion valve, the out-of-car external heat exchanger and the gas-liquid separator. Heating circulating liquid flows through a heater under the action of a water pump, an in-car radiator and the plate heat exchanger enable the refrigerant and the heating circulating liquid to be subjected to heat exchange in the plate heat exchanger. A heat pump type car air conditioner provided by the heat pumptype car air conditioning system has various working modes, can realize linked battery thermal management functions, can perform battery cooling and in-vehicle heating while defrosting, improves in-car thermal comfort, and ensures that a battery works within a working temperature range, and the heat pump type car air conditioning system is provided with a charging pile refrigeration system to assist cooling in the high-power fast charging conditions of the battery to meet heat dissipation demands of the battery.

Description

technical field [0001] The invention relates to the technical field of automobile air-conditioning, in particular to a heat pump type automobile air-conditioning system suitable for high-power fast-charging working conditions. Background technique [0002] In the automotive field, in order to reduce environmental pollution, large-scale development of electric vehicles has become a trend. Realizing the large-scale application of new energy vehicles while comprehensively improving the quality and performance of electric vehicles is one of the mainstream development directions at present. [0003] Pure electric vehicles do not have a fuel engine, and the car air-conditioning system cannot continue to use the waste heat from the engine, except that the compressor cannot continue to be directly driven by the engine, and the waste heat of the engine cannot continue to be used for heating in winter. Currently, most electric vehicles use PTC electric heaters for direct heating, and t...

AI Technical Summary

Problems solved by technology

[0005] The present invention designs and develops a heat pump automotive air-conditioning system suitable for high-power fast-charging conditions. One of the objectives of the present invention is to overcome the inability of the existing electric vehicle air-conditioning system to meet the heat dissipation requirements of the battery under high-power fast-charging conditions. deficiencies in demand, an auxiliary refrigeration system is provided

[0006] The second object of the present invention is to overcome the defect of poor thermal comfort in the car during defrosting of the existing air-conditioning system of electric vehicles, and provide a circulation loop that can defrost and battery cooling at the same time, without affecting the thermal comfort in the car at this time

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