红外热成像技术在多联机故障检测中的应用

制冷管路堵塞是多联机系统运行中的重要故障现象之一,严重影响了系统的正常工作。常规的检测方法是依据技术人员的经验,配合在管路上布置热电偶所获得的数据,进行综合分析,从而判断故障原因及故障点位置,检测效率低。本文采用红外热成像技术,通过最大负荷制冷工况、名义制冷工况、最大负荷制热工况和名义制热工况试验,研究了多联机在制冷管路堵塞情况下的红外数据、图像及其与热电偶测试数据的比较。研究结果表明,红外热成像技术能够快速、直观、准确地定位故障位置,可应用于多联机的故障检测并提高检测效率。

Application of infrared thermography in fault detection of multi-connected air conditioner

The blockage of the refrigeration pipeline is one of the important failure phenomena in the operation of the multi-connected air conditioner,which seriously affects the normal operation of the system.The conventional detection method is based on the experience of the technicians,and the data obtained by arranging the thermocouples on the pipeline is comprehensively analyzed to determine the cause of the fault and the position of the fault point,and the detection efficiency is low.In this paper,infrared thermography is used to study the infrared data and images of the multi-connected air conditioner under maximum load refrigeration condition,nominal refrigeration condition,maximum load heating condition and nominal heating condition.It is compared with the thermocouple test data.The research results show that infrared thermography can locate faults quickly,intuitively and accurately,and can be applied to fault detection of the multiconnected air conditioner and improve detection efficiency.