The core is equipped with an efficient on-board dedicated refrigeration unit, supporting the optional installation of different models of domestic or imported units with the same power. The refrigeration temperature can flexibly cover the entire scene from -25 ℃ to+15 ℃, which can complete the freezing transportation of meat, seafood and other goods, as well as 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, meeting relevant compliance transportation 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 avoids 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, suitable for long-distance transportation endurance requirements, and reduces operating costs. The refrigerated compartment adopts a fully sealed sandwich composite structure, strictly following professional insulation technology. The exterior is made of high-quality fiberglass material, and the internal skeleton is made of corrosion-resistant galvanized pipe. The middle is filled with high-density polyurethane insulation layer, which has low thermal conductivity and excellent insulation performance. It can effectively block external temperature conduction, reduce refrigeration energy consumption, ensure long-term stable temperature inside the compartment, and meet the continuous insulation needs of medium and long-distance transportation. The bottom of the cabin is equipped with aluminum alloy anti slip patterned plates, which are easy to clean and anti slip and wear-resistant. The interior can be equipped with ventilation groove aluminum guide rails according to needs to improve the efficiency of cold air circulation; The exterior is wrapped with aluminum alloy edges and stainless steel corners. The rear door frame and locking components are all made of stainless steel material, paired with tight rubber sealing strips to enhance sealing performance and prevent cold air leakage. At the same time, a meat hanging structure can be optionally installed according to demand to meet the transportation needs of special goods such as white striped meat.