The temperature control inside the refrigerated truck compartment in Chongqing determines the degree of freshness of the goods. In general, users need to pay attention to the temperature settings of the thermostat and the pre cooling or preheating of the refrigerated compartment. But in practical operation, many people have operational misconceptions.

Firstly, the temperature setting of the thermostat. Users need to set the thermostat at the desired temperature and pre cool the cargo box for 1.5 hours to dissipate the heat trapped inside the box. When loading, turn off the refrigeration unit and quickly load the cargo.

In addition, the refrigerated compartment should be pre cooled or preheated before loading. Due to the vehicle being parked outdoors, the temperature inside the cabin is usually the temperature of the external environment.

If the temperature of the transported goods is not the ambient temperature, and the goods are loaded into the carriage, the ambient temperature will affect the temperature of the transported goods, resulting in a change in the quality of the transported goods. Therefore, the carriage should be pre cooled to the required temperature before loading.

Many users may have misconceptions during operation, such as not turning off the refrigeration unit when loading and unloading goods

Reason analysis: If the car is not turned off after pre cooling, when the car door is opened, the fan of the freezer evaporator is working, and the front of the fan is positive pressure, while the back is negative pressure. Therefore, cold air is blown out from the upper part of the car, and the lower part will quickly suck in the hot air outside, causing the temperature inside the car to rise rapidly.

If the goods are loaded and unloaded after shutting down, the air flow stops due to the fan being in a stopped state, and the air pressure inside and outside the carriage is consistent, which slows down the speed of external hot air transfer into the container.