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Supermarket refrigerated showcase refrigeration system components disassembly, diagnosis and maintenance
supermarket refrigerated showcase refrigeration system components disassembly, diagnosis and maintenance
1. Anti-dew pipe removal and diagnosis Because the anti-dew pipe belongs to a high-pressure system, the failure rate is high and it is hidden Inside the supermarket refrigerated showcase door frame, it cannot be disassembled or replaced, and can only be thrown away. Supermarket refrigerated showcase has different brands and models, and the number of anti-dew pipes and nozzle connection methods are also different, but Qianzhi can be classified into four types, and the anti-dew pipe must be between the compressor brake steam pipe (thin) and the filter nozzle between.
1. The method of removing the anti-exposure tube. To remove the anti-exposure tube, open the compressor process nozzle to vent a >. Find the anti-exposure tube at the bottom of the back of the supermarket refrigerated showcase. One > installs the condenser nozzle directly to the filter nozzle. [Note] The length of the condenser nozzle can be appropriately increased or decreased according to the connection requirements, and the dryer filter should be replaced with a new one. If the length of the condenser nozzle is not enough, a 6mm diameter copper pipe can be added.
2. The leakage of anti-exposure tube diagnosis is the only form of anti-exposure tube damage. There are two manifestations: one is that the total pressure does not leak, most of which is anti-exposure tube leakage; the other is that it leaks in a short time and should be checked All refrigeration systems. The supermarket refrigerated showcase has rust stains on the door frame, 80% of which are leak-proof pipes inside. The pressure method to diagnose anti-dew is to open the compressor process tube to deflate, clamp the capillary 2 cm away from the filter, and weld the capillary tube on the filter side with gas welding. Clamp the entrance of the anti-dew pipe, weld a pressure gauge at the entrance of the anti-dew pipe, fill the anti-dew pipe with nitrogen to 1.0MPa, and check the pressure gauge reading after 24 hours. If it drops, it indicates that the anti-exposure tube is leaking. [Note] The connection position of the nozzle of the anti-dew tube is different. The closed nozzle of the anti-dew tube is different from the nozzle of the pressure gauge and pressure gauge. The general principle is to suppress the dew tube separately.
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