Ultra clean workbench selection

    Today, there are different types of clean workbenchs on the market according to different standards. According to the operating structure, it can be divided into unilateral operation and bilateral operation. According to the air flow direction, it can be divided into horizontal flow clean workbench and vertical flow clean workbench. ; According to the use, it can be divided into two types: ordinary clean workbench and biological (medical) clean workbench. Before purchasing and using a clean workbench, you need to understand how it works.
1. Working principle
    Ultra-clean workbench work usually requires four major accessories: ultraviolet germicidal lamp, static elimination equipment, stainless steel orifice tabletop, and ULPA ultrafilter. Its principle is that in a specific space, the ultra-clean workbench draws indoor air into the pre-filter through a fan, presses it into the static pressure box through a small centrifugal fan, and then enters the filter from the static pressure box for secondary filtration. Dust particles and biological particles are taken away to make the operating area reach level 100 cleanliness, forming a sterile and highly clean working environment to meet the demand for cleanliness.
2. Tips for purchasing an ultra-clean workbench:
   ⑴Fan and filter:
   The fans and filters used in the ultra-clean workbench reflect the technical level of the product. Different countries have big differences in the definition of air filters. The real filtration efficiency of air filters and filters cannot be equated. When purchasing, you can refer to the filtration efficiency data of filters with similar micron particle filtration efficiency. The smaller the particles, the higher the filtration efficiency and the better its performance. The photon counting method is usually used for testing, and the sodium flame method is a common testing method in China.
   ⑵ Product grade:
   Clean workbenches in the domestic market are usually divided into three types: economical type, ordinary type, and high-end type. The economical model uses domestic ordinary fans and national standard air filters, but its indicators are lower than the standard. Its control system is simple and its appearance is not good. The ordinary type uses domestically produced air filters, with performance close to imported products, and uses mid-range fans, with good overall performance. The third type is to use the original filter. The fan meets the usage characteristics of the ultra-clean workbench. It uses a motor to drive the glass door. There are sensors in the box that can reflect the working conditions of the filter.
3. Lifetime cost:
    When purchasing an ultra-clean workbench, you need to consider the long-term use of equipment, maintenance, and upkeep costs. During the use of the air filter, dust will accumulate on the filter surface, causing the wind resistance to increase. Finally, the filter will be scrapped, resulting in system failure. Product adoption Installing a pre-filter can extend the service life of the filter.