铁路客车空调机组高压保护故障影响因素探究  

Study of the Factors Affecting the HV Protection of Air-conditioning Units in Railway Passenger Cars

作　　者：管全梅 王永朋 冯前前 张英利 于菲菲 GUAN Quanmei;WANG Yongpeng;FENG Qianqian;ZHANG Yingli;YU Feifei(CRRC Tangshan Locomotive&Rolling Stock Co.,Ltd.,Tangshan 063035,China;China Railway Urumqi Group Co.,Ltd.,Urumqi 830000,China)

机构地区：[1]中车唐山机车车辆有限公司,河北唐山063035 [2]中国铁路乌鲁木齐局集团有限公司,新疆乌鲁木齐830000

出　　处：《铁道车辆》2024年第5期198-203,共6页Rolling Stock

摘　　要：铁路客车在夏季高温天气行驶过程中空调机组发生报出高压保护故障。通过对故障进行调查、原因分析和地面试验验证,确定了造成空调机组高压保护故障的主要因素有外界环境温度高、太阳辐射、冷凝风量衰减和空调机组电磁旁通阀的触发条件设置不合理等。为了解决上述问题,对空调机组中电磁旁通阀的控制逻辑进行了优化,利用压缩机电流评估制冷系统高压压力来控制电磁旁通阀动作,可以提升空调机组耐高温能力;基于安全导向原则,在压缩机安全允许范围内设置压力开关动作冗余次数,可以保障车内人员乘坐舒适性。试验验证表明,优化方案可有效解决空调机组高压保护故障。It is common for the air-conditioning units of railway passenger cars to fail when they are running in hot weather in the summer.Through fault investigation,cause analysis and ground test verification,it is determined that the main factors causing the HV protection fault of the air-conditioning unit are high external environment temperature,solar radiation,attenuation of condensing air volume and unreasonable setting of triggering conditions of the electromagnetic bypass valve of the air-conditioning unit.To solve the above problems,the control logic of the electromagnetic bypass valve in the air-conditioning unit is optimized,and the action of the electromagnetic bypass valve is controlled by evaluating the high pressure of the refrigeration system by using the compressor current value.This can improve the high-temperature resistance of the air-conditioning unit.According to the safety principle,setting the redundant number of pressure switch actions within the safety allowable range of the compressor can ensure the comfort of people in the vehicle.The test demonstrates that the optimized scheme can effectively resolve the high-voltage protection issue of air-conditioning units.

关 键 词：铁路客车 空调机组 高压保护 故障 影响因素 优化 

分 类 号：U270.38[机械工程—车辆工程]