Summary of basic knowledge of laminar flow cabinet

Ultra-clean workbench is a one-way flow air purification equipment that provides a local dust-free and sterile working environment. It is widely used in scientific research and production departments that need local clean and sterile working environment, such as medicine and health, biopharmaceutical, food, medical science experiment, optics, electronics, sterile room experiment, sterile microorganism test, plant tissue culture inoculation, etc. It can also be connected into an assembly line with the advantages of low noise and mobility. It is a kind of air purification equipment with strong universality to provide local high cleanliness working environment. Its use has good effects on improving process conditions, improving product quality and increasing yield.
Note: The cleanbench is different from the biosafety cabinet.
The ultra-clean worktable can only protect the reagents operated in the worktable from pollution, and does not protect the staff. The biosafety cabinet is a negative pressure system, which can effectively protect the staff.
Its working principle is
The air is sucked into the prefilter through the fan, and then enters the high efficiency filter through the static pressure box for filtration. The filtered air is sent out in a vertical or horizontal airflow state, so that the operating area can reach the level of 100 cleanliness and ensure the production requirements for environmental cleanliness. The ultra-clean workbench can be divided into vertical flow ultra-clean workbench and horizontal flow ultra-clean workbench according to the direction of air flow. According to the operation structure, it can be divided into unilateral operation and bilateral operation. According to its purpose, it can also be divided into ordinary ultra-clean workbench and biological (medical) ultra-clean workbench.
1. Working principle
The principle of ultra-clean worktable is that in a specific space, the indoor air is filtered by the pre-filter, pressed into the static pressure box by a small centrifugal fan, and then filtered by the air HEPA filter. The clean air flow blown from the air outlet of the air HEPA filter has a certain and uniform section wind speed, which can remove the original air in the working area, take away the dust particles and biological particles, so as to form a sterile and highly clean working environment.
2. Product classification
From the airflow direction, it can be divided into vertical flow ultra-clean workbench and horizontal flow ultra-clean workbench; In terms of the number of operators, the ultra-clean worktable is divided into single worktable and double worktable; The ultra-clean worktable is divided into conventional type, new type push-pull type and self-circulation type (only vertical DC) in structure.
The ultra-clean workbench is divided into vertical flow clean bench and horizontal flow clean bench according to the direction of air flow. The vertical flow workbench is noisy because the fan is on the top, but the vertical wind is mostly used in medical engineering to ensure human health; The noise of horizontal flow worktable is relatively small, so it is mostly used in the electronic industry, and has little impact on health. According to the operation structure, it can be divided into unilateral operation and bilateral operation. According to its purpose, it can also be divided into ordinary ultra-clean workbench and biological (medical) ultra-clean workbench.