The insulation board is made of high-density polyurethane as the core material, and the outer layer is covered with galvanized color steel plates, which have low thermal conductivity and excellent sealing performance. The refrigeration system is equipped with a high-efficiency compressor, air-cooled condenser and ceiling-mounted evaporator to ensure rapid cooling and stable temperature control. The overall structure is strong, with anti-corrosion and impact resistance, meeting the needs of frequent movement and multi-scenario applications.