Electric automobile heat management system

Abstract

The invention discloses an electric automobile heat management system. The electric automobile heat management system comprises a compressor, an expansion valve, an automobile exterior heat exchanger and an HVAC assembly and further comprises an automobile interior evaporator and an automobile interior condenser which are arranged in the HVAC assembly. An automobile interior refrigeration loop, an automobile interior heating loop, an automobile interior defrosting / demisting loop and an automobile exterior heat exchanger defrosting loop are jointly composed of the compressor, the expansion valve, the automobile exterior heat exchanger, the automobile interior evaporator and the automobile interior condenser. By adoption of the provided electric automobile heat management system, the structure is novel and compact, the electric automobile heat management system is easy to achieve, the problem about heating under the low temperature work condition is solved, and the electric automobile air conditioner energy efficiency ratio and the electric automobile endurance mileage are increased; the automobile interior heating loop can be rapidly switched to the automobile exterior heat exchanger defrosting loop, the automobile exterior heat exchanger generates heat, automobile exterior heat exchanger defrosting is rapidly achieved, heat dissipated by large-power electric appliances can be utilized for heating for the automobile interior, the heating capability is improved, and energy is saved as well.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a heat management system for electric vehicles. Background technique [0002] An electric vehicle refers to a vehicle powered by a vehicle-mounted power supply, driven by a motor to drive the wheels, and conforming to the requirements of road traffic and safety regulations. Since the impact on the environment is smaller than that of traditional vehicles, and with the increasingly stringent requirements for energy conservation and emission reduction, the development prospects of electric vehicles are widely optimistic. Since the traditional fuel vehicle heating adopts the waste heat heating system of the water tank, which is based on the vehicle engine, the electric vehicle air conditioner must be redesigned. [0003] The air conditioning system in the existing electric vehicle thermal management system generally adopts heat pump air conditioners. However, t...

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Problems solved by technology

[0003] The air conditioning system in the existing electric vehicle thermal management system generally adopts heat pump air conditioners. However, the current heat pump air conditioners have not yet realized the heating problem of the refrigerant under low temperature conditions (above -20°C), resulting in low energy efficiency ratio of electric vehicle air conditioners. , affecting the cruising range of electric vehicles

In addition, the heat exchanger outside the vehicle is prone to frost, and it is difficult to defrost under heating conditions

Moreover, the current electric vehicle thermal management system does not take advantage of the heat emitted by high-power electrical appliances

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