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Wuxi Leidun Security Technology Co., Ltd
The working principle and wide application of clean air fume hood
Date: 2025-10-25Read: 22
The clean air type fume hood creates a negative pressure environment through a built-in fan, allowing the air in the laboratory to enter the cabinet through the opening of the inclined front door panel. After being adsorbed by multiple layers of filters (such as activated carbon, HEPA H14, etc.) to absorb toxic and harmful gases, the clean air is circulated and discharged into the room or discharged through the top exhaust outlet. Its core advantage lies in its pipeline free design, which eliminates the need for an external exhaust system and achieves high gas purification efficiency through molecular filters.
1、 Detailed explanation of working principle
1. Airflow control: After the fan is started, a surface wind speed of 0.4-0.6m/s is formed to create an airflow barrier to prevent chemical spills.
2. Filtering and purification: Air flows from bottom to top, passing through chemical filters (adsorbing organic/acidic gases) and HEPA filters (intercepting particulate matter) in sequence.
3. Circular emission: The purified air can be directly discharged into the room or discharged through the top exhaust outlet. Some models support secondary purification of indoor air.
2、 Application Fields
1. Laboratory scenarios: chemical experiments, drug development, microbial cultivation, etc., especially suitable for handling low volatility reagents.
2. Medical field: The hospital laboratory is used to filter low concentration volatile gases such as formaldehyde and xylene.
3. Industry and Education: Welding waste gas treatment in the electronics industry, safety protection in primary and secondary school laboratories, etc.
Its modular design supports flexible configuration of filter types, such as products from brands like Elab that comply with SEFA standards and can adapt to various experimental needs.
