Please pay attention to accidents when purchasing air showers and ultra-clean workbenches. Everyone has their own opinions on this issue. Here are just some suggestions for your reference. No matter how the salesperson shows off all kinds of novel technologies in front of you, you must pay attention to the fans and filters used in this air shower and ultra-clean workbench. These two things represent the technical level of the product and cannot be faked. Unfortunately, the domestic level of fans and high-efficiency air filters is much worse than foreign products, so domestically produced products generally use imported filters and fans.
Many people will say to you that we use high efficiency air filters. This is an interesting text, because countries have different definitions and standards for high efficiency air filters, and even test methods are quite different, so it is better not to filter high efficiency air. The concept of filter is equivalent to the real filtration efficiency of the filter. Suppliers can be required to provide filtration efficiency data for filters similar to those with greater filtration efficiency for micron particles. The smaller the particles, the higher the filtration efficiency, the better the performance of the filter. It is worth noting that the generally used test method is the photon counting method. , And the domestic general test method is the sodium flame method.
Quotation is an important factor when purchasing air showers and clean benches. However, if you consider that the purchase of ultra-clean workbenches is equipment that is used for a long time, the maintenance and maintenance costs are also higher. Therefore, the lifetime cost of the product should be considered. Here is an outstanding feature of the ultra-clean workbench. Its air filter is a consumable product. Dust on the surface of the filter will accumulate during use, which will increase the wind resistance and cause the filter to be scrapped and the system will fail. When purchasing the air shower and ultra-clean workbench, the product will alert you immediately if such a phenomenon occurs, but you cannot be sure whether the same problem has occurred in the middle and low-end products. Do you know what you have to buy for the extra money? Filters are troublesome and costly, so most of the medium products adopt the method of adding a pre-filter to extend the service life of the filter, and most low-end products are just a symbolic addition of a piece of cloth.
The general classification of ultra-clean workbench selection in the domestic market is:
Economical type: The purchase of ultra-clean workbench adopts the national standard high-efficiency air filter, the index is lower than the standard, and the appearance is not good; the fan is generally a domestic ordinary fan, which has good performance at the beginning of work, but it will not perform well after a long time. Guarantee; In order to reduce costs, external air filters are mostly not used; the control system is simple and the appearance is not good.
Ordinary type: purchase of air shower room and ultra-clean workbench. Fully imported or domestically produced air filters using foreign materials and foreign technologies, with performance close to imported products; mid-range products and useful fans are used as the fans, which are more reliable. , But most of them are not designed for the special needs of ultra-clean workbenches, so the uneven air volume during long-term use is its characteristic; the overall performance is better, but the control system is relatively simple, and the glass doors are generally manual.
The air shower room and ultra-clean workbench are all imported products or mostly use original filters; the fan uses imported fans designed according to the characteristics of the ultra-clean workbench; the main performance is higher than the ordinary type; the control system is Special optimization by users: most glass doors are driven by electric motors, there are sensors in the box, which can reflect the working conditions of the filter, and a few products use embedded control systems.