The core is equipped with an efficient car specific refrigeration unit, which supports the installation of different models of domestic or imported units with comparable power from other manufacturers. The refrigeration temperature can flexibly cover the entire scene from -25 ℃ to+15 ℃, which can not only complete the freezing transportation of meat, seafood and other goods, but also achieve the preservation and refrigeration of fruits, vegetables and dairy products. It can also adapt to transportation scenarios with strict temperature requirements such as vaccines and drugs, in line with GSP certification requirements. The refrigeration system operates stably, with a fast cooling rate that can quickly reach the set temperature and maintain a constant temperature, effectively locking in the freshness of the goods. Combined with excellent insulation performance, it can avoid the deterioration of goods due to temperature fluctuations during medium and long-distance transportation. At the same time, the energy consumption of the refrigeration unit is reasonable, adapting to the endurance requirements of long-distance transportation and reducing operating costs. The refrigerated compartment adopts a fully sealed sandwich composite structure, following strict insulation technology. The exterior is made of high-quality fiberglass material, the internal skeleton is made of galvanized pipe, and the middle is filled with 8cm thick high-density polyurethane extruded board. It is formed by a fully automatic gluing and pressing machine, with uniform gluing and less bulging, greatly improving insulation performance, effectively blocking external temperature conduction, reducing refrigeration energy consumption, ensuring long-term stable temperature inside the compartment, and adapting to the continuous insulation needs of medium and long-distance transportation. It can control the loss of cooling capacity within a reasonable range. The bottom of the cabin is equipped with aluminum alloy anti slip patterned plates as standard, with aprons on the inner sides and drainage holes at the front for easy cleaning and anti slip wear resistance; The exterior is wrapped with aluminum alloy profiles and stainless steel corners. The rear door frame and locking components are made of stainless steel, paired with labyrinth rubber seals and rainproof door edge strips to enhance sealing performance and prevent cold air leakage. The interior of the carriage is equipped with LED lighting, which facilitates checking the situation inside the carriage when loading and unloading goods. The top of the carriage is closed and cannot be opened, further improving the insulation effect and meeting the requirements of the vehicle announcement.