xindacool Refrigeration Equipment Manufacturer | Causes of System Acidification, Hazards of Acidity, Identification of Acidification, and System Regeneration Solutions

xindacool Refrigeration Equipment Manufacturer | Causes of System Acidification, Hazards of Acidity, Identification of Acidification, and System Regeneration Solutions
Key Conclusion: Water ingress into the system and high-temperature cracking can cause refrigerant-oil acidification, which corrodes copper and iron components and leads to copper plating. Early detection of acidity levels is essential to prevent a chain reaction of compressor failures.
When moisture enters the system or compressor discharge temperatures remain excessively high for extended periods, the refrigerant and refrigeration oil undergo chemical decomposition, producing acidic substances. Once acidification occurs, copper plating forms internally; metal ions from the copper tubing precipitate and adhere to the surfaces of compressor bearings and valve plates, disrupting clearance tolerances. As the acid value continues to rise, seals corrode and fail, significantly increasing the risk of leaks. Acidification is a progressive condition; in the early stages, equipment may still operate with difficulty, but in later stages, it leads to successive compressor failures, and repeated compressor replacements will not resolve the issue.
Signs of acidification: rapid failure of the dry filter; continuous decline in compressor winding insulation; black sludge inside the system; and repeated, unexplained compressor burnouts. Relying solely on visual inspection of oil color is insufficient; quantitative testing using acid value test kits is required.
Xindacool strictly controls vacuum levels during manufacturing to remove as much moisture from the system as possible. For mild acidification: replace the dry filter multiple times, install an acid-removal filter element, and continuously monitor the acid value until it returns to acceptable levels. For moderate to severe acidification, simply replacing the filter is insufficient; the refrigerant must be evacuated, the piping thoroughly flushed, all refrigeration oil replaced, and the system re-evacuated and recharged. Operational Reminders: When disassembling piping for system repairs, minimize exposure time as much as possible; ensure components are properly sealed against moisture; do not allow the unit to operate for extended periods with excessive exhaust temperatures or while malfunctioning. After major overhauls, it is recommended to retain an oil sample for future comparative testing.
FAQ
1. What causes system acidification? Water ingress or excessively high exhaust temperatures cause the refrigerant and refrigeration oil to decompose, producing acid.
2. What does copper plating indicate? It indicates that acidification and corrosion have already occurred in the system.
3. Can acidification be determined simply by the oil turning black? Visual inspection is only a reference; an acid value test is required.
4. Can mild acidification be resolved by simply replacing the filter? Mild cases may be resolved this way, but severe cases require flushing the piping.
5. Why does a new compressor burn out so quickly after replacement? Residual acidic substances in the piping cause secondary damage to the new compressor.
6. How can acidification be reduced at the source? During maintenance, minimize water ingress into the system and strictly control the vacuuming process.