Despite the maturity, reliable operation, and stable performance of mechanical refrigeration technology, there are still many shortcomings, such as the need for power drive (either independent motor drive or car engine drive) and the susceptibility to Freon leakage.

With the continuous development of energy conservation, Chongqing's refrigerated truck technology has put forward a new concept of energy conservation, especially the research on new refrigeration methods, which provides new choices for the development of refrigerated trucks.

The series of dry ice ice packs with phase transition temperatures of -55 ℃, -33 ℃, -18 ℃, -12 ℃, and -6 ℃ completely solve the embarrassing situation of relying solely on dry ice as a refrigerant in low-temperature distribution.

Dry ice type low-temperature ice packs can be stored like common regular ice packs and are very convenient to use. Before use, put it in a low-temperature refrigerator and freeze it thoroughly. When using, take it out and put it in the insulated box together with the item, and seal the box mouth to maintain the low temperature for more than 120 hours, ensuring the security of the distribution of biological agents and food.

This technology fills the gap in the industry and brings a new dawn to aviation low-temperature distribution. In recent years, some scholars have proposed the technology of using liquid CO2 vaporization refrigeration for refrigerated truck manufacturers, which works similarly to liquid nitrogen refrigerated trucks.

It has the advantages of large refrigeration capacity, rapid cooling, accurate temperature control, economic reliability, and environmental friendliness, and has conducted an economic analysis of liquid CO2 refrigerated truck technology.

Experimental research was conducted on the flow characteristics and mass flow rate characteristics of liquid CO2 in capillaries, and the capillary length matched with the cooling load was obtained. Their research has opened up a new path for refrigerated truck technology in China.