The advantages of physical cleaning, discussed by the Chongqing refrigerated truck editor, are: saving the cost of chemical cleaning solutions, avoiding the waste liquid disposal problems after chemical cleaning, and reducing the risk of corrosion to condenser copper tubes. The disadvantages are: poor cleaning effect on stubborn, hard scale and corrosion products, and more time-consuming and labor-intensive operation.

1. Cleaning Temperature: Generally, room temperature cleaning is used. If the scale is thick, cleaning at 40℃~50℃ can increase the cleaning speed.

2. Close the valves in and out of the unit. Use a pressure gauge or thermometer tube, corrosion-resistant pump, and acid tank to form a cleaning circulation system. Add a corrosion inhibitor first, and after the corrosion inhibitor has circulated evenly, slowly add organic acid. During cleaning, the reaction should be monitored regularly, and the cleaning agent should be replenished if necessary to ensure sufficient acid to react with the scale. Depending on the scale reaction, appropriate amounts of scale remover and defoamer can be added during cleaning.

3. After cleaning, drain the remaining liquid and rinse with clean water.

4. After cleaning the condenser, a neutralizing and passivating agent needs to be added to neutralize residual acid and prevent oxidation of the inner metal wall.

5. The condenser cleaning time is approximately 5-10 hours, depending on the actual situation.