Using environmentally friendly pure natural working fluid, carbon dioxide (COz, R744); Overall design, compact structure, easy to move and install, saving installation costs; Adopting well-known piston compressors and high-efficiency motors from both domestic and international sources, it is efficient, energy-saving, safe, and reliable; Adopting imported components from abroad, with ultra-low cavitation allowance design, the unit design is more compact; Completing pipeline connections and electrical wiring within the factory can ensure system cleanliness and installation quality; Simple and intuitive control interface; Significantly reducing the amount of carbon dioxide injection is in line with national safety supervision policies.