Electric car air conditioning system with air source heat pump

Abstract

The invention discloses an electric car air conditioning system with an air source heat pump. The electric car air conditioning system has a refrigerating mode, a conventional heating mode, a low-temperature heating mode and a defrosting mode in an electric car, and a main loop of the air conditioning system comprises a compressor, an indoor condenser arranged on an outlet pipeline of the compressor, an indoor evaporator arranged on an air return pipeline of the compressor, an outdoor heat exchanger arranged on a pipeline between the indoor condenser and the indoor evaporator, a first valve arranged between the indoor condenser and the outdoor heat exchanger, a second three-way valve arranged between the outdoor heat exchanger and the indoor evaporator, and a first throttling device arranged between the second three-way valve and an inlet of the indoor evaporator. A by path of the second three-way valve is connected with an inlet of the compressor. In the low-temperature heating mode of the air conditioning system, a middle air supplementing system operates, and the electric car air conditioning system has the advantages of being reliable in operation, high in heating capacity, high in heating efficiency and the like.

Description

technical field [0001] The invention relates to the field of refrigeration and air conditioning, in particular to an electric vehicle air conditioning system using an air source heat pump. Background technique [0002] Automobile air conditioners maintain the comfort of the car environment by controlling the temperature and humidity inside the car, and improve the safety of the car through defrosting and defogging. It is an important part of the car and the auxiliary equipment that consumes the most energy in the car. Compared with traditional internal combustion engine vehicles or hybrid vehicles, pure electric vehicles do not have an engine as a power source to drive the air conditioning system for cooling operation, and there is no engine waste heat to use for heating and defrosting. [0003] At present, electric vehicles mainly use PTC (positive temperature coefficient) electric heating for heating in winter, which has low operating efficiency and large power consumption...

AI Technical Summary

Problems solved by technology

[0003] At present, electric vehicles mainly use PTC (positive temperature coefficient) electric heating for heating in winter, which has low operating efficiency and large power consumption, which will greatly reduce the operating mileage of electric vehicles

Conventional heat pump systems used in automotive air conditioners use two heat exchangers, indoor and outdoor, and switch between heating and cooling modes through a four-way valve, which has poor vibration resistance and reliability

In addition, the conventional air source heat pump system, in the low temperature outdoor environment, the air intake of the compressor is low, the exhaust temperature is high, and the heating capacity and efficiency are greatly reduced, which cannot meet the heating demand and realize low-temperature heating, while the excessively high exhaust The temperature seriously affects the safety of the system operation, making the conventional heat pump system unable to operate normally in the low-temperature environment outside the car in winter

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