An automatic air conditioning control system for electric vehicles

Abstract

The invention discloses an automatic air-conditioner control system used for an electric car. The automatic air-conditioner control system comprises an air-conditioner controller, a compressor, a condenser, a drying liquid accumulator, an expansion valve, an evaporator, an air blower, an air door and an air door motor driver and further comprises an internal car temperature sensor, an external car temperature sensor, an internal car temperature set unit and an air door opening degree set unit, wherein the internal car temperature sensor is installed in a car cab and connected with the air-conditioner controller, the external car temperature sensor is installed at an inlet of the evaporator and connected with the air-conditioner controller, the internal car temperature set unit is installed in the car cab and connected with the air-conditioner controller, and the air door opening degree set unit is installed in the car cab and connected with the air-conditioner controller. According to the automatic air-conditioner control system used for the electric car, frequency converting control over the compressor is achieved, the temperature of the car cab is changed steadily, the experience comfort of a passenger is improved, energy sources are saved, and the endurance mileage of the electric car is increased.

Description

technical field [0001] The invention relates to the technical field of automobile air conditioners, in particular to an automatic air conditioner control system for a new energy electric vehicle. Background technique [0002] Compared with traditional diesel locomotives, new energy vehicles generally use power batteries as the power source, and the on-board air-conditioning compressor is no longer driven by the engine, but driven by the motor. In order to maximize the cruising range of the vehicle, the power consumption of the vehicle air conditioner must be minimized and the overall efficiency of the air conditioning system must be improved. At present, the existing control technology of new energy electric vehicle air-conditioning system generally follows the traditional vehicle air-conditioning control scheme. After receiving the cooling command, the drive motor of the compressor starts and stabilizes at the specified speed to achieve cooling. The air door of the air-cond...

AI Technical Summary

Problems solved by technology

[0003] 1. The speed of the compressor is controlled by the compressor driver, and the opening of the damper of the air-conditioning system is controlled by the air-conditioning controller, which cannot realize the optimal control of power consumption and affects the cruising range of the vehicle;

[0004] 2. Compressor cooling at a fixed speed. For example, if the ambient temperature is higher than 25°C, the compressor will start, and if the ambient temperature is lower than 22°C, the compressor will stop. This kind of non-frequency conversion control consumes a lot of energy, and the compressor starts and stops frequently, shortening the service life and poor passenger experience.

Images