3. Don't need to pre-cool the goods in advance?
Answer: wrong. The incubator of the refrigerated truck plays the role of heat preservation, and the refrigeration unit maintains the temperature of the goods, so the goods and the compartment must be pre-cooled in advance.
Pre-cooling of goods: Pre-cooling of goods to normal storage temperature. For example, chilled meat is frozen at minus 18 for 1 hour, and the acid discharge is 0-424 hours before it is qualified. Use a thermometer to measure whether the temperature of the goods is qualified, and only the goods with qualified temperature can be loaded. Auto pre-order: discharge the heat inside the body. The top cooling temperature of the vehicle should be consistent with the cargo temperature. If the set temperature of the unit is too low, cooling cannot be accelerated; if the set temperature is too high, it will affect the quality of the product. If the required cargo temperature is lower than 4, manual defrosting is required when precooling the car, which can remove the accumulated frost on the evaporator coil, which is beneficial to the control of the cargo temperature of the unit.
4. The goods are packed in boxes without any requirement?
Answer: wrong. Before loading, it is recommended that the refrigerated truck be stored in a cool place and pre-cooled in advance. It is recommended to transport refrigerated trucks on pallets for loading to ensure circulation ventilation of cold air at the bottom. The distance between the product and the front and side panels of the refrigerator is 60-80 mm, the bottom plate is 200 mm, and the product is 200 mm lower than the evaporator. Some items (such as fruits, vegetables, and cooled meat) that can generate heat by themselves (field heat, respiratory heat) must ensure that the airflow completely flows through the items to dissipate heat. This is the so-called airflow accumulation; items that cannot generate heat can be tightly stacked In the middle of the box (such as frozen fish, frozen meat, ice cream); if there are no pre-cooled products (fruits and vegetables, etc.) under force loading, it is recommended to install diagonal louvers to take away heat through airflow, commonly known as "ventilation", and then start the refrigeration unit, It is beneficial for the unit to control the temperature of the cargo.
5. Is it difficult for goods with low temperature to drop during transportation, and goods with high temperature are easy to drop?
Answer: wrong. As mentioned earlier, the refrigeration unit is to maintain the temperature of the cargo. If the goods are cold, the cooling speed will be fast. On the contrary, if the heat of the goods is very high during transportation and volatilizes continuously, even if the storage temperature of the goods is very high, it is difficult to cool down. for example,
For example, the fewer goods to be transported, the greater the air volume in the box, and the greater the demand for cooling capacity. Instead, more cargo is transported, with greater cooling capacity and faster cooling.