HG-45b宽温区环控装置研发

针对载运装备宽温区人机环控的需要，在HLD-45b环控装置应用实践的基础上，分析了中高温混合工质流动和传热特性对系统性能的影响，认为优化蒸发器结构、强化室内侧换热能力可进一步提升产品性能。根据应用需求研发了HG-45b宽温区环控装置，基于HLD-45b的室外机配套设计了壁挂式的室内机，改进蒸发盘管结构、增大换热面积和蒸发风量，并优化热力膨胀阀的匹配。新款HG-45b与HLD-45b的检测对比数据表明，制冷量提高约10%，压缩机功率降低约5%，能效比提高约14.5%，系统性能稳定，压缩机排气温度、排气压力均在安全范围内，达到了系统优化的目标。

Research and Development of HG-45b Environmental Control Equipment for WideTemperature Range

Effects of flow and heat transfer characteristics of medium and high temperature mixed-refrigerant on system performance were analyzed combing with the application experience of HLD-45b according to the requirement of man-machine environment control of wide-temperature range of transporting vehicle. It was concluded that evaporator structure optimization and enhancement of indoor side heat transfer capacity were the key points to improve the performance of air conditioner. HG-45b air conditioner was developed which used HLD-45b outdoor unit and wall-mounted style of indoor unit, to meet the practical applications requirements. Heat transfer area and air volume were both increased while changing the evaporation duct structure and the thermal expansion valve was also optimized. The test data showed that cooling capacity and EER of HG-45b are10% and 14.5% more than that of HLD-45b respectively while its input power is5% less; the system performance is stable while the exhaust temperature and pressure of compressor are in the safe range, and the optimized goal is achieved.