Condensation inside the insulated reefer box is a common headache for operators of light refrigerated truck, freezer lorry and cold chain delivery vehicle. Excessive box condensation will make cargo wet, accelerate food spoilage, corrode the box panel and shorten the service life of the reefer truck. This guide shares practical methods for fresh logistics fleets, helping you control moisture in the cold box of HOWO, FAW and SAIC refrigerated trucks, including RHD reefer truck models for overseas markets.https://www.hjtrailer.com/truck/box-truck/howo-light-reefer-truck.html
First, reduce hot and humid air entering the refrigerated compartment. Condensation mainly happens when warm humid air touches cold box walls. Minimize the frequency and opening time of box doors during loading and delivery. Try to finish loading quickly in shaded or pre-cooled warehouse areas instead of open high-temperature environments. Equip the reefer box with rubber sealing gaskets, and regularly check door seals for aging, cracks and air leakage. Damaged seals are the top cause of humid air infiltration.
Second, pre-cool the reefer box before loading goods. Start the refrigeration unit ahead of schedule to bring the box temperature down to your target transport temperature before loading. Never put warm fresh produce directly into the cold box. For fruits and vegetables with high water content, pre-cool them in a cold storage room first to release surface heat and moisture. This step greatly cuts down moisture release inside the freezer box.
Third, keep proper air circulation inside the insulated box. Do not stack cargo tightly against box walls or block the evaporator air outlet. Leave gaps between goods for cold airflow. Use cargo pallets to lift products off the box floor, so air can circulate underneath. Poor airflow traps moisture and causes water droplets on panels.
Fourth, control cargo moisture and package properly. Wrap high-humidity goods with breathable waterproof packaging. Avoid leaking packages, melted ice bags or free water inside the box. Drain the water from the box drain pipe regularly to prevent accumulated water from evaporating and forming new condensation.
Fifth, maintain the refrigeration unit and evaporator. Clean the evaporator coil and drain pan routinely. Blocked drain lines will stop condensed water from draining out. Check the defrost function of the reefer unit; automatic defrost settings should match your cargo type and ambient humidity.
Sixth, choose high-quality insulated box materials. Premium cold box panels with good sealing and low water absorption reduce moisture penetration. If your old reefer box has water ingress inside the insulation layer, the foam will stay damp and keep producing condensation, which needs professional repair.
Following these measures can effectively reduce water condensation, protect fresh cargo and extend the working life of your refrigerated box truck. We supply RHD light reefer trucks with reliable sealing structures for fresh product distribution.
