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为了广泛提高产品质量,需要把空气洁净技术推向更普及的程度。但是,阻力大、价格贵以及全抛弃的高效过滤器限制了许多部门使用这一技术。事实上有许多部门并不一定要求采用高效过滤器,一是因为洁净度级别不高,如电子计算机房这样的洁净室(见表1);二是因控制粒径较大,如医药卫生部门,控制的一般细菌是以菌团或孢子的形式存在,其大小可按等价直径考虑,为1～5μm;另据实验,大气中带菌微粒的平均直径约4.2～5μm。如果有一种过滤器,它的效率虽低于高效,但阻力和价格也都低于高效过滤器较多,而且用完后不全抛弃,则这种过滤器将会在上述那些部门得到推广。这种过滤器就是低阻亚高效过滤器。
In order to widely improve product quality, it is necessary to push air clean technology to a more widespread level. However, high-resistance, high-cost, and completely abandoned high-efficiency filters have restricted many departments from using this technology. In fact, many departments do not necessarily require the use of high-efficiency filters. First, cleanliness levels are not high, such as cleanrooms in electronic computer rooms (see Table 1); and second, control of larger particle sizes, such as the medical and health sector The general bacteria controlled are in the form of bacteria or spores, the size of which can be considered in terms of equivalent diameter, which is 1 to 5 μm. According to another experiment, the average diameter of particles in the air is about 4.2 to 5 μm. If there is a filter, its efficiency is lower than the efficiency, but the resistance and price are also lower than high-efficiency filter, and if it is not completely abandoned after use, the filter will be popularized in those above-mentioned departments. This type of filter is a low-impedance, high-efficiency filter.