Container ocean shipping or storage process, great temperature difference between day and night at sea, locked in a freight container during the day as moisture-laden air in the night temperature can reach ultra saturated, containers tend to experience ocean temperature changes in climate and strong temperature difference between day and night, temperatures will be between 0-80 ℃, relative humidity of up to 98%, this is the phenomenon of condensation. When the temperature is 30 ° c, and water content in the air is 30.4g/M3, when reducing the temperature from 30 ° c to 18 c, the water vapor will fall to 15.4 g/m3. Other water vapor condenses into water, which is commonly known as the "container rain."
