Adopting the German Bitzer semi closed low-temperature screw compressor, it has the characteristics of high efficiency, long service life, low vibration, and low noise; The unit configuration is complete, and the main refrigeration accessories and control components are all from world-renowned brands, with high reliability; The unit has various safety protections such as compressor reversal, overheating, overload, exhaust temperature, low oil level, oil flow, and system high and low pressure to ensure the reliability of operation; The unit is equipped with an economizer, which greatly improves the cooling capacity during low-temperature operation. It has multi-stage energy regulation and can adapt to changes in different cooling loads, effectively reducing energy consumption.