High-efficiency refrigeration unit (stainless steel casing), the unit can be installed separately. Cooling down from room temperature, the empty warehouse reaches -40°C within 30 minutes. The entire unit can be pushed in, with a production capacity of 50-100 kg per hour. Double-sided stainless steel warehouse body with thickened high-density insulation layer. Imported high-efficiency air cooler, touch screen automatic control, capable of recording and exporting temperature.