Everyone has their own opinions on this issue. Here are just some suggestions for your reference. No matter how the salesperson shows off various novel technologies in front of you, you must pay attention to the fans and filters used in this 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 domestic high-end products generally use imported filters and fans.
Many people will tell you that we are using high-efficiency air filters. This is an interesting word game, because the definitions and standards of high-efficiency air filters are different in different countries, and even the test methods are quite different. The concept of a filter is equivalent to the true filtration efficiency of a filter. Suppliers can be asked to provide filter efficiency data similar to filters with micron particle filtration efficiency greater than, the smaller the particles, the higher the filtration efficiency, the better the performance of the filter, it is worth noting that the commonly used test method in the world is photon counting Method, and the common test method in China is the sodium flame method.
Please pay attention to the grade of the product you need, the general sub-class of the ultra-clean workbench on the domestic market is:
Economical: The national standard high-efficiency air filter is used, the index is lower than the international standard, and the appearance is not good; the fan is generally a domestic-made ordinary fan, and the performance is good at the beginning of the work, and the performance cannot be guaranteed after a long time; Most do not use external air filters; the control system is simple and the appearance is not good.
Ordinary type: all imported or domestically produced air filters using foreign materials and foreign technology, the performance is close to imported products; the fan uses mid-range products, and the fan is also useful, which is more reliable, but most are not special for ultra-clean workbenches It needs to be designed, so the uneven stroke volume for a long time is its characteristic; the overall performance is better, but the control system is relatively simple, and the glass door is generally manual.
High-end type: all imported high-end products or mostly 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 specially optimized for users: glass doors Most are driven by electric motors, and there are sensors inside the box, which can reflect the working conditions of the filter to improve the reliability of the product. A few products use an embedded control system.
Don't just focus on the quotation of ultra-clean platform
When purchasing an ultra-clean workbench, quotation is an important factor. However, if it is considered that the ultra-clean workbench is a long-term equipment, the cost of maintenance and repair is also relatively high. Therefore, the full life cost of the product should be considered. There is a prominent feature of the ultra-clean workbench here. Its air filter is a consumable. The dust on the surface of the filter will accumulate during use, resulting in increased wind resistance. Finally, the filter will be scrapped and the system will fail. Once such a phenomenon occurs, high-end products will immediately alert you, but you cannot know whether the same problem has occurred in mid-range and low-end products. Do you know what the extra money spent buying and replacing the filter is troublesome and expensive Therefore, most medium and high-end products adopt the method of installing a pre-filter in order to prolong the service life of the filter, and most low-end products are only a symbolic addition of cloth.
Pay attention to the cleaning and disinfection of the ultra-clean workbench
The ultra-clean workbench is a special workbench. Imported products will use a lot of space to tell you how to clean and disinfect. A better ultra-clean workbench will have many accessories, most of which are related to cleaning and disinfection. The optional ultra-clean platform should be able to install at least ultraviolet lamps for disinfection and sterilization. You may wish to ask the supplier what they have done for the customer's cleaning and disinfection. If you find that a certain product is not suitable for cleaning, you don't need to consider it. It may have good performance and low price, but it will be very inconvenient for long-term use.
Optical design of ultra-clean workbench
Maybe you think it's very simple and bright, and you can see it clearly. If you are a purchasing person, you often have to watch for a few seconds, and the operator may have to stare at the sample for hours under such a light. If the light source design is not reasonable, then they will soon tired. So you should pay attention: the light in the cabinet should not be too bright. If the experimenter needs strong light, a few fluorescent tubes are not enough, they will prepare the light source by themselves; do not directly illuminate the eyes of the operator, you can do like How to see if you can see the fluorescent lamp clearly when sitting in front of the workbench; many suppliers like to make the stainless steel worktop and inner cavity as bright as a mirror to advertise the cleanliness of their products, but this may just make it The light is directly reflected into the eyes of the operator, which is not good for use, so when you are in the position of the operator, you should not clearly see the shadow of the fluorescent lamp on the work surface.
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