Laboratory pain points that can be solved: 1. The solvent is volatilized, the smell is strong, and there are occupational health hazards; 2. Dust falls into the bottle and causes pollution; 3. The solvent is easy to deteriorate; 4. The decrease of solvent volatilization concentration affects the experimental results; 5. The pipeline is messy and easy to tangle: 6. Some laboratories do not cover the lid, the pipeline is not fixed, shaking and other conditions may easily cause the solvent inlet to be higher than the solvent liquid level, causing air to enter the equipment.