纯电动汽车热泵空调系统优化

Optimization of heat pump air-conditioning system for battery electric vehicle

针对纯电动汽车在冬季行驶过程中热泵空调系统外部换热器结冰失效的问题,提出增加主动式可调节进气格栅以及使用分层空调系统的优化设计方案,并通过整车环境模拟试验进行验证。结果表明:车辆装配主动式可调节进气格栅,运行1 h后,外部换热器的最大结霜面积不超过总面积的30%,热泵空调系统可以一直正常工作;在相同条件下,分层空调系统出风口温度较传统空调系统高5~6℃,达到设定目标温度用时更短,该方案既可增加整车续航里程,又具有较高的制热效率及整车舒适性。

Aimed at the issue of icy failure of the external heat exchanger for the heat pump air-conditioning system of battery electric vehicle during driving in winter,one optimal design solution adding active grille shutters and using dual layer air-conditioning system is proposed.This solution is verified by vehicle environment simulation test.The results show that by adding the active grille shutters,after running for one hour,the maximum frosting area of the external heat exchanger is less than 30% of the total area,and the heat pump air-conditioning system can keep operating properly.Under the same condition,the outlet temperature of dual layer air-conditioning system is higher than that of traditional air-conditioning system by 5-6℃,and it takes less time to reach the setting teperature.This solution can not only increase the cruising mileage,but also achieve higher heating efficiency and vehicle comfort.