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display cooler compressor disassembly, diagnosis and maintenance
display cooler compressor disassembly, diagnosis and maintenance
compressor disassembly method and precautions
1. Show the compressor disassembly method, open the display cooler refrigeration system to discharge the refrigerant, and weld it The compressor and the refrigeration pipeline are connected to the nozzles, use a wrench to remove the compressor fixing screws, hold the compressor in the horizontal direction, and place it upright. Use compressor plugs or plastic tape to seal the compressor nozzles to prevent dirt Things enter. Note that if you are disassembling an ordinary compressor, the inclination angle of removing, installing and placing the compressor should not exceed 45 degrees to prevent the internal vibration damping spring from being unhooked.
2. Compressor precautions
(1) For reciprocating compressors, they must be kept upright during transportation and repair, and their inclination angle must not exceed 45 degrees to prevent the internal suspension spring from being unhooked.
(2) Replace the compressor with the same refrigerant model. The compressor nameplate is marked with the refrigerant model, such as R600a or R134a, R12. The R600a compressor is marked with a yellow flame flammable sign: the R134a compressor is marked with R134a . The compressor power is the same or similar, no more than ±10%. Because of the high power of the compressor, although the refrigeration effect of the display cooler is not affected, the high pressure ratio of the compressor will result in high condenser pressure, which will easily leak over time. If the compressor with low power is selected, the length of the capillary tube should be shortened, and the refrigerant charge should be adjusted at the same time. Otherwise, the compressor has insufficient air volume and the refrigeration effect is poor, even in a state of preservation.
(3) The compressor welding process should be fast, the temperature should not be too high, and try not to repeat welding, so as to prevent the compressor nozzle from welding blockage, welding leakage, oxidation (not welding).
(4) When there are leaks at the roots of the compressor high and low pressure pipes (that is, the joints with the shell) and need to be repaired, cooling measures should be taken.
(5) All pipe ports of the compressor should be blocked at any time to prevent dust and other dirt from entering.
(6) When storing the compressor replaced with R600a fluorine-free refrigerant display cooler, pour out the refrigerating oil and seal all pipe ports.
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