Product features: 1. Due to the lack of a cooling water tank, the amount of refrigerant that can fill the circulation loop can be greatly reduced, and the cooling consumption time is very short, allowing for rapid circulation. 2. The lower limit of temperature setting is -20 ℃, which can be used for concentration of low boiling point solvents. 3. This equipment can be used for recycling two 1L rotary evaporators and solvent recovery devices. 4. Small in size, can be placed in a fume hood, equipped with casters. 5. Equipped with a freeze prevention pressure switch, it can prevent the cooling part from freezing.