集装箱回风温度下降分析：货物未预冷或预冷不充分

We also noticed that the return air temperature of the container began to decrease slowly from 23.6 degrees Celsius since 0221 on February 22nd, after it started working, and it decreased to 15 degrees Celsius at 0000 on the 24th. This indicates that the goods were not pre-cooled or were not sufficiently pre-cooled before being loaded into the container.