Publish Time: 2021-11-29 Origin: Site
Laminar Flow Hoods, also named as clean bench, is a one-way air purification equipment that provides a local dust-free aseptic working environment. It is widely used in research and production departments that require a clean and sterile working environment such as medicine and health, biopharmaceuticals, food, medical science experiments, optics, electronics, sterile room experiments, sterile microbiological inspections, plant tissue culture inoculation, etc. It can also be connected to an assembly line with the advantages of low noise and mobility. It is a kind of air purification equipment with strong versatility to provide local high cleanliness working environment. Its use has good effects on improving process conditions, improving product quality and increasing yield.
Note: Cleanbench is different from Biosafety Cabinet.
The ultra-clean workbench can only protect the reagents operating in the workbench from contamination, and does not protect the staff. The biological safety cabinet is a negative pressure system, which can effectively protect the staff.
The principle of ultra-clean workbench is that in a specific space, the indoor air is initially filtered by a pre-filter, pressed into the static pressure box by a small centrifugal fan, and then filtered by a high efficiency air filter for a second time, from the air outlet surface of the high efficiency filter. The blown clean air flow has a certain and uniform cross-sectional wind speed, which can remove the original air in the working area, and take away dust particles and biological particles to form a sterile and high-clean working environment.
From the air flow direction, it is divided into: vertical flow ultra-clean workbench and horizontal flow ultra-clean workbench; the ultra-clean workbench is divided into the number of operators: it is divided into single workbench and double workbench; the ultra-clean workbench is divided in structure : Divided into conventional type and new push-pull type and self-circulation type (only for vertical flow).
The clean bench is divided into vertical flow clean bench and horizontal flow clean bench according to the direction of the airflow. The vertical flow bench is noisy because the fan is on the top, but the wind blows vertically. It is mostly used in medical engineering to ensure people's health; the horizontal flow workbench has relatively low noise and winds outwards, so it is mostly used in the electronics industry and has little effect on health. According to the operation structure, it can be divided into two forms: unilateral operation and bilateral operation. According to its purpose, it can be divided into ordinary ultra-clean workbench and biological (medical) ultra-clean workbench.
The service life of the ultra-clean table is related to the cleanliness of the air. In temperate areas, the ultra-clean bench can be used in general laboratories, but in tropical or subtropical areas, where the atmosphere contains pollen or dusty areas, the ultra-clean bench should be placed in a better room with double doors for use. . Under no circumstances should the air inlet hood of the ultra-clean bench face the open door or window, so as not to affect the service life of the filter.
The UV lamp can also be hoisted on the ultra-clean workbench, but it should be installed outside the lampshade, and the arrangement of the lamps should be staggered so as not to hinder the lighting during work. It is useless if the ultraviolet lamp is installed in the illuminating lampshade (glass plate), because ultraviolet rays cannot penetrate the glass, its lamp tube is quartz glass, not silicate glass.