Heat pump air conditioner system and electric vehicle

Abstract

The invention relates to a heat pump air conditioner system and an electric vehicle. The heat pump air conditioner system comprises a compressor, an indoor condenser, an indoor evaporator, an outdoorheat exchanger and a first swelling switch valve, an outlet of the compressor is communicated with an inlet of the indoor condenser, an outlet of the indoor condenser is selectively communicated withan inlet of the outdoor heat exchanger through a first throttle branch, an outlet of the outdoor heat exchanger is communicated with an inlet of the first swelling switch valve, a first outlet of thefirst swelling switch valve is communicated with an inlet of the compressor, a second outlet of the first swelling switch valve is communicated with the inlet of the indoor evaporator, an outlet of the indoor evaporator is communicated with an inlet of the compressor, and an outlet of the compressor or an outlet of the indoor condenser is further communicated with an inlet of the outdoor heat exchanger through a first through-flow branch. In this way, the heat pump air conditioner system has the advantages that heating energy efficiency can be improved, defrosting and defogging laws and regulations are met, and the installation is facilitated; pipe connection can be simplified, the refrigerant injecting amount of the whole heat pump air conditioner system is reduced, and oil conveniently returns to the compressor.

Description

technical field [0001] The present disclosure relates to an automobile air-conditioning system, in particular to a heat pump air-conditioning system, and also to an electric vehicle equipped with the heat-pump air-conditioning system. Background technique [0002] Electric vehicles do not have the engine waste heat that traditional vehicles use for heating, so they cannot provide a heating source. Therefore, the air-conditioning system of the electric vehicle must have the function of heating itself, that is, adopt a heat pump type air-conditioning system and / or electric heating for heating. [0003] The invention patent with publication number CN102788397A discloses a heat pump air-conditioning system for electric vehicles. Although the heat pump air-conditioning system can be used in various types of electric vehicles, the system uses two outdoor heat exchangers (an outdoor condenser and an outdoor evaporator), resulting in a large wind resistance of the front-end module ...

AI Technical Summary

Problems solved by technology

This structure requires two tee joints and six pipelines, the structure is relatively complicated and it is not easy to install

When the solenoid valve is closed and the electronic expansion valve is used, the inlet of the electronic expansion valve is a medium-temperature and high-pressure liquid refrigerant, and the outlet of the electronic expansion valve is a low-temperature and low-pressure liquid refrigerant. Since the pipelines are connected, the inlet and outlet of the solenoid valve are also separated. The state of the refrigerant at the inlet and outlet of the electronic expansion valve is consistent, and the pressure and temperature of the refrigerant at the inlet and outlet of the solenoid valve are different, which is easy to cause damage to the internal structure of the solenoid valve

In addition, due to the large number of pipelines, the refrigerant charging amount of the entire heat pump air-conditioning system will be increased, and the cost will be increased.

When the heat pump air-conditioning system works at low temperature, it is difficult for the compressor to return oil, and this complex structure is not conducive to the oil return of the heat pump air-conditioning system

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