长春工业大学学报

针对纯电动汽车空调节能与热舒适性需求，设计含内部热交换器(IHX)的热泵空调系统，并提出模糊PID控制方法。IHX通过高、低压侧制冷剂换热提高过冷度和压缩机入口过热度；模糊PID依据温度误差及变化率在线整定参数。AMESim-Simulink联合仿真表明，IHX使过热度提高约6.0℃、过冷度提高约4.8℃、COP提升0.2～0.6;模糊PID较常规PID响应更快、波动更小、适应性更强。

To meet the requirements of energy saving and thermal comfort in battery electric vehicle air conditioning, a heat pump system with an Internal Heat Exchanger(IHX) is designed, and a fuzzy PID control method is proposed. The IHX improves subcooling and compressor inlet superheat through heat exchange between the high-and low-pressure refrigerant lines. The fuzzy PID controller adjusts PID parameters online according to temperature error and error change rate. AMESim-Simulink co-simulation results show that the IHX increases superheat by about 6.0 ℃, subcooling by about 4.8 ℃, and COP by about 0.2～0.6. Compared with conventional PID, fuzzy PID achieves faster response, smaller temperature fluctuation, and better adaptability.