To maintain air quality within the cleanroom, the following measures can be taken:

1. Regular Filter Replacement: Filters are essential equipment for maintaining clean air within the cleanroom. Regularly replacing filters ensures timely replacement when they expire or become damaged, thus guaranteeing air quality.

2. Controlled Experimental Procedures: Experimental operations should be conducted within the cleanroom, avoiding any activities outside of it to minimize contamination of the air within the cleanroom.

3. Routine Disinfection: Conduct regular disinfection of the internal surfaces of the cleanroom bench to maintain the cleanliness of the internal air.

4. Controlling Indoor Temperature and Humidity: Indoor temperature and humidity also affect air quality, so it is necessary to regulate them.

5. Rational Layout: The arrangement of the purification workbench should be rational to avoid obstructing air flow and causing air pollution.

Filters play a crucial role in the purification of workstations, effectively removing particles and bacteria from the air to maintain a clean and safe experimental environment. However, the filtration efficiency of filters gradually decreases over time, necessitating timely replacement.

Generally, the replacement time for filters depends on factors such as usage frequency, operating environment, and filter type. The specific replacement time can be referenced from the manufacturer's recommendations or by measuring the filter pressure drop. Pressure drop refers to the pressure difference generated due to resistance within the filter as air passes through it. When the pressure difference reaches a certain level, it is necessary to replace the filter.

In addition to regularly replacing filters, maintaining air quality within the purification workbench also requires attention to the following points:

Regularly clean workstations and accessories to prevent dust and bacteria from accumulating inside.

Regularly inspect and clean air filters to ensure proper functioning.

3. Avoid using volatile organic compounds, strong acids and bases, and other chemicals that affect air quality within the work station.

4. Adhere to laboratory regulations and maintain good hygiene practices to minimize the generation of air pollution sources.