Electric vehicle heat pump system

Abstract

The invention discloses an electric vehicle heat pump system which comprises a refrigerant circulation loop and a coolant circulation loop. The coolant circulation loop comprises a double flow channel heat exchanger in pipeline connection, an electric water pump and at least a fourth heat exchanger. The refrigerant circulation circuit comprises a compressor for compressing refrigerant, a valve or a valve assembly for switching a refrigerant flow path, a heat exchanger outside a carriage, a throttle assembly and a heat exchanger in the carriage. The refrigerant circulation loop further comprises a double flow channel heat exchanger in pipeline connection at an air absorbing opening side of the compressor, and a first flow channel of the double flow channel heat exchanger is communicated with an air absorbing opening of the compressor and a fourth interface pipeline of a four-way valve. A second flow channel of the double flow channel heat exchanger is communicated with the coolant circulation loop. The electric vehicle heat pump system can not only achieve cooling of devices such as a battery and a converter under a refrigerating or a heating mode, and the whole evaporating temperature of operation of the heat pump system is improved.

Description

Technical field [0001] The invention relates to an electric vehicle air conditioning system, in particular to an electric vehicle cooling system capable of ensuring good heat dissipation of some main components of the electric vehicle and ensuring driving safety. Background technique [0002] With the development of the low-carbon economy, more stringent requirements have been put forward for energy conservation and emission reduction. As electric vehicles have the characteristics of energy conservation and environmental protection, they will become one of the future aspects of automobile development. [0003] With the continuous improvement of the quality of life, people pay more and more attention to the comfort in the car compartment. Traditional internal combustion engine vehicles can use the waste heat of the internal combustion engine and the heat of the engine exhaust to heat the compartment, while the power of electric vehicles is mainly The reason lies in the motor, which ...

AI Technical Summary

Problems solved by technology

[0006] However, when the temperature is high in summer, the air-cooled heat exchanger cannot effectively reduce the temperature of each cooling component, thus failing to achieve the effect of cooling components.

[0007] In addition, in the prior art, there is no effective use of the cold energy generated in the air-conditioning system of electric vehicles to cool each component that needs to be cooled.

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