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What exactly is a clean workbench?
What exactly is a clean workbench?Clean workbench, also known as ultra-clean workbench, is a kind of air purification equipment that can provide a local dust-free, sterile working environment. It is like a delicate "micro haven." Through clever design and advanced purification technology, outside dust, microorganisms, and other pollutants are shut out.Its working principle contains a sophisticated knowledge of aerodynamics. Indoor air will first pass through a pre-filter for preliminary filtration as if the air is made a "coarse sieve" to remove larger particles of impurities. Then, the small centrifugal fan forces the initially filtered air into the static chamber, where the airflow rate is adjusted to prepare for the subsequent deep purification. Subsequently, the air enters the high-efficiency filter, which is the key to "put the gate", it can capture extremely small dust particles, bacteria, viruses, etc., for the particle size of ≥0.5μm of dust, and its control ability is excellent, the number of such dust per liter of air is less than 3.5, the filtered clean air is blown out of the air surface with a uniform and stable cross-section wind speed. Quickly remove the original air in the work area, sweeping away possible dust particles and biological particles, thereby creating a sterile and spotless working environment, so that the operating area is stable to the level 100 cleanliness standard, which is crucial in many precision work areas. From the perspective of structure, the clean workbench is mainly composed of a box, fan, primary filter, high-efficiency filter, power supply countertop, and other components. The box as a whole support structure, usually using a cold rolled steel spray process, which not only ensures strength, but also has good corrosion resistance; The fan, like the heart, continuously provides power for air circulation; The primary effect and high-efficiency filter each perform their duties, layers of protection; The work table is made of stainless steel, smooth and smooth, easy to clean, providing a solid foundation for experimental operation, product assembly and other work, some of the table is also equipped with plexiglass enclosure, which can prevent external airflow interference, and facilitate the operator to observe the internal situation, some high-end models can also be equipped with ultraviolet lamp remote control electrical interface, Convenient sterilization before and after use. It is worth noting that many people will confuse the clean workbench with the biosafety cabinet. Although they are similar in appearance, their functions are quite different. The clean workbench focuses on protecting the reagents and samples of the operation from pollution. It is a positive pressure system, and the airflow is blown from inside to outside. The biosafety cabinet is a negative pressure system, that can effectively protect the staff, it is designed to prevent the operation of infectious experimental materials such as primary cultures, strains and diagnostic samples, contagious aerosols, and spatter that cause harm to personnel and the environment, it can be said that the two in different professional scenarios play an irreplaceable role. |
