What are the common fault phenomena caused by icing blockage in a refrigeration system?
2 Answers
Icing blockage in a refrigeration system usually results in the blockage not being able to maintain a tight fit with the pipeline, withstand pressure, or maintain sealing. Possible causes and solutions for icing blockage failure are as follows: Possible causes of icing blockage failure: Insufficient supply of liquid nitrogen or dry ice, presence of a heat source nearby (such as welding), poor contact between dry ice and the pipeline, etc. Solutions: It is necessary to check whether the liquid nitrogen bottle has sufficient quantity, whether the liquid nitrogen supply line is broken or leaking, and whether there is a heat source nearby. If dry ice is used, it must be checked whether there is insufficient dry ice in the dry ice jacket and whether the dry ice is in close contact with the pipeline. Practice has shown that quickly replenishing liquid nitrogen, supplementing and compacting dry ice to ensure tight contact with the pipeline can promptly and effectively prevent the initial failure of icing blockage.
Speaking of refrigerant system icing, I have firsthand experience. One summer during a long drive, the AC suddenly stopped blowing cold air, delivering only a slight chill before even warm air came out. Upon closer inspection, I noticed a layer of white frost forming on the vents below the dashboard, and the cabin air grew increasingly stuffy. This happens because icing typically occurs at the evaporator, where ice blocks refrigerant flow, disrupting the cycle. Prolonged operation under these conditions leads to complete loss of cooling, overloading the compressor, which may produce a buzzing noise. The worst part? Driving in scorching weather turns the car into a steamer, severely compromising comfort. I later learned this is often caused by excessive moisture in the system or insufficient refrigerant. Immediate inspection and repair are crucial to prevent costly compressor damage down the line.
