1. Daily Maintenance

● Equipment Cleaning: Regularly clean the inside and outside of the machine. Remove dust, dirt, and other debris. Use a clean, damp cloth to wipe gently. Avoid harsh or abrasive cleaners to prevent damage. Pay special attention to cleaning the drainage outlet and pipes to prevent blockage and bad smells.

● Liquid Nitrogen Level Check: Check the liquid nitrogen tank level every day to make sure there is enough liquid nitrogen. If the level is low, refill it in time to keep the machine running well.

● Seal Check: Frequently check the machine’s pipes, valves, door seals, and other sealed parts to ensure there are no leaks. If you find any damaged or worn-out seals, replace them to reduce nitrogen loss and maintain freezing performance.

2. Regular Maintenance

● Parts Inspection: Every month or quarter, inspect key parts, like the temperature sensors and electrical control system, to see if there is any wear, loose connections, corrosion, or damage. Repair or replace parts as needed.

● Safety Valve Check: The safety valve is an essential part of the machine. Check it at least once a year to make sure it works properly if pressure gets too high, avoiding potential safety issues.

● System Pressure Test: Regularly test the liquid nitrogen freezer’s pressure to make sure it stays within the normal range. If there is abnormal pressure, find the cause and fix it. This could include blocked pipes, faulty parts, or liquid nitrogen supply issues.

● Liquid Nitrogen Pipe Maintenance:

• • Check the insulation on liquid nitrogen pipes. If the insulation is damaged, repair it to reduce nitrogen loss and prevent cold burns from touching cold pipes.
  • Clean out any dirt or frost inside the pipes to prevent blockage and ensure smooth nitrogen flow.

● Electrical System Maintenance: Inspect the electrical wires to ensure they’re well-connected and free of short circuits, disconnections, or poor contact. Regularly clean electrical parts like controllers, relays, and contactors to prevent dust from interfering with operation. Also, check if the grounding is reliable for safe operation.

3. Long-Term Shutdown Maintenance

● If the liquid nitrogen quick freezing machine needs to be shut down for a long time, make sure to completely empty 100% of the liquid nitrogen and gas left in the pipes. This prevents any remaining liquid from evaporating and increasing pressure inside the pipes..

● Apply protective oil on parts that may rust or corrode. Cover the machine with a dust cover or plastic to keep out dust, moisture, and other contaminants.

● During long shutdowns, start the machine every few months to check if it works well and to keep all parts running smoothly, preventing issues from staying idle.

4. Maintenance Safety Tips

● Maintenance should be done by trained professionals who know the liquid nitrogen quick freezing equipment’s functions and safety guidelines.

● Maintenance workers must wear suitable safety gear, like low-temperature gloves, safety goggles, and hard hats, to avoid frostbite, bruises, and other injuries.

● Record all maintenance work in detail, including the date, tasks, issues found, and solutions. This helps track the machine’s condition over time.