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display cases Capillary disassembly, diagnosis and maintenance
author: supermarket refrigerated showcase category: walk-in display coolers Views: 997Time: 2016-08-22
display cases Capillary disassembly, diagnosis and maintenance
No matter what kind of display cases, the capillary part is hidden in the display cases, so the capillary cannot be disassembled. In addition, the failure rate of the capillary tube itself is almost zero, and there is no need to disassemble it. This also determines that the original capillary must be thrown away when the evaporator is mounted, and a new capillary must be configured.
1. Precautions for capillary welding
①The flame of the welding torch should be reduced, and the capillary tube orifice should not be heated, otherwise the tube orifice may be welded thinly or blocked, increasing the flow resistance of the display cases. The capillary nozzle should not have burrs or shrinkage, and the nozzle should be downward when polishing to prevent dirt from entering. The capillary tube is inserted straight into the filter nozzle, and the insertion length should be about 1.5 cm.
②The capillary should not be inserted too short, otherwise the welding material will easily block the capillary inlet during welding, and the small and fine particles will directly enter the capillary during operation and increase the possibility of clogging.
③The capillary should not be inserted too much, otherwise it may cause the capillary mouth to withstand the molecular sieve, increase the flow resistance of the refrigerant, and affect the cooling effect.
2. The possibility of capillary ice blockage and welding blockage diagnosis and treatment of capillary leakage is almost zero. Only a few tube walls have burrs, causing display cases to appear irregular and beeping. However, improper maintenance of the refrigeration system will cause the capillary tube to be blocked by ice, dirty, and welding.
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