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Failure analysis and treatment of commercial refrigeration refrigeration equipment
author: supermarket refrigerated showcase category: walk-in display coolers Views: 532Time: 2016-08-22
Failure analysis and treatment of commercial refrigeration refrigeration equipment
The method of checking failure and the signs of normal operation
1. The method of checking the failure is due to the commercial refrigeration, the condenser, and the refrigerator. , Expansion valve and many equipment accessories are connected and interact with each other. Therefore, once the refrigeration device fails, you should not focus on only one part, but conduct a comprehensive inspection of the entire system And comprehensive analysis. This requires accumulation of practical experience and theoretical guidance. Through the summation of long-term practice, the operator has explored a lot of experience in checking faults, and summed it up into a set of basic methods of one listening, two touching, three watching, plus analysis. Listen to to see if the sound of compressors, expansion valves and other equipment is normal during operation. two touch , touch the cold and heat changes of related parts and pipeline connections in the system, and touch the cold and heat conditions and vibration of the compressor. Look at three times, look at the high and low pressure values during operation, the oil pressure, and the water pressure; look at the setting values of the differential pressure relay, temperature relay, and pressure relay; look at the oil level and liquid level ; Look at the frost and condensation on the evaporator, return pipe and infusion pipe. plus analysis , using the relevant theory of commercial refrigeration refrigeration equipment to analyze and judge the phenomenon, find the cause of the failure, and eliminate it in a targeted manner.
The sign of the normal operation of the refrigeration device. When the refrigeration machine is started, you should first know whether the refrigeration system is operating normally. The following is a brief introduction to the contents and signs that work normally.
(1) After the refrigerator is started, there should be no noise in the cylinder, and only the normal rising and falling sound of the suction valve can be heard. During operation, a screwdriver can be used to perform auscultation , and more listening will be able to distinguish between normal and abnormal interference from other sound sources.
(2) The condenser cooling water should be sufficient, and the water pressure should meet 0.12 Xiu. Above, the water temperature cannot be too high.
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