Electric automobile waste heat recovery air conditioning system and control method

Abstract

The invention discloses an electric automobile waste heat recovery air conditioning system and a control method. The electric automobile waste heat recovery air conditioning system comprises a refrigerant circulation system using R134a, a motor electric control water circulation system using ethylene glycol and water and a branch connecting the refrigerant circulation system and the motor electriccontrol water circulation system. According to the electric automobile heat pump air conditioner system and the control method, the heating energy efficiency ratio of the electric automobile heat pump air conditioner can be increased in the ultralow-temperature environment, the battery pack can be assisted in heating when the electric automobile is started in winter, the deicing efficiency of anexternal heat exchanger during deicing can be improved, and therefore the performance of the whole electric automobile is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle air conditioners, and more specifically relates to a waste heat recovery system and control method for electric vehicle air conditioners. Background technique [0002] Compared with traditional cars, other devices such as power batteries, motors, and motor controllers are added to electric cars. In order to meet the reliability of electric vehicles, the thermal management performance requirements are higher. Thermal management energy consumption usually increases, and in ultra-low temperature environments, heat pump air conditioners cannot meet the performance requirements of energy consumption ratio, and the waste heat of the electronic control part of the motor is usually difficult to use. In order to reduce the energy consumption of the thermal management system of electric vehicles, based on the vehicle thermal From the perspective of management, it is one of the important ways to ap...

AI Technical Summary

Problems solved by technology

Thermal management energy consumption usually increases, and in ultra-low temperature environments, heat pump air conditioners cannot meet the performance requirements of energy consumption ratio, and the waste heat of the electronic control part of the motor is usually difficult to use. In order to reduce the energy consumption of the thermal management system of electric vehicles, based on the vehicle thermal From the perspective of management, it is one of the important ways to apply efficient and diverse waste heat recovery technology to the air conditioning system of electric vehicles

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