Pre-cooling the refrigerating unit for an hour and a half , setting the temperature at the required temperature, and exhausting the heat remaining in the cabin. Because refrigerated trucks are generally parked and wait to load goods, its compartment temperature and ambient temperature are close. At this time if you do not pre-cooling compartment, then the delivery of goods is likely due to the ambient temperature, leading to damage to the goods.

In addition the refrigerator car load goods without pre-cooling , there will be temperature difference on different degrees , resulting in cooling uneven for refrigerated compartment , damage to the goods,too.

So it is essential to pre-cooling refrigerant units during the cold chain logistics transportation!