This series of falling film evaporator is a high-efficiency and energy-saving evaporation equipment developed by Fusi, which absorbs the advanced technology at home and abroad and combines Fusi's experience for many years. It can save the original flavor of fruit juice to a large extent. It is suitable for evaporation and concentration of materials with high heat sensitivity, high sugar content and high requirements for aroma preservation. At the same time, the patented aroma recovery technology can be used for backfilling or making Flavor products. The equipment is operated continuously under vacuum and low temperature, and belongs to the natural circulation liquid membrane concentration equipment.