The refrigerated truck manufacturer teaches you the use of refrigerated and insulated vehicles and temperature adjustment. The refrigerated truck needs to set the temperature above the required temperature, pre-cool the car for 1 hour to remove the heat stranded in the car; when the cargo is loaded, the refrigeration unit is turned off and the cargo is loaded quickly. When the refrigerated truck I pre-cooled the car, if it is not turned off, when the car door is opened, since the fan of the refrigerating unit evaporator is working, the front of the fan is positive pressure, and the back side is negative pressure, so the cold air is blown out from the upper part of the car. The lower part will quickly suck in the hot air outside, which will cause the temperature inside the refrigerated truck to rise rapidly. If the cargo is loaded and unloaded after shutdown, the air flow stops due to the stop of the fan treatment, and the wind pressure inside and outside the compartment is consistent, so the external heat is used. The speed at which air is delivered into the cabin is relatively slow.

When the refrigerated truck is loading, it is necessary to pre-cool or preheat the compartment. Because the vehicle is parked in the open air, the cabin temperature is usually the ambient temperature. If the temperature of the goods being transported is not the ambient temperature, the car will be loaded with the car, and the ambient temperature will affect the temperature at which the goods are transported, resulting in a change in the quality of the goods being transported. Therefore, the car must be pre-cooled to the required temperature before loading. However, when loading (same as unloading), it is necessary to shut down the refrigeration unit. Many people do not turn off the refrigerated truck refrigeration unit when loading and unloading goods. In fact, this is a very wrong operation.