With the wide attention of air filters, the classification of air filters has a certain understanding. The classification of air filters is very much. We can make certain distinctions according to our needs. The following is explained by the northern filter. The air filters are separated by the target:
First, the air filter is as follows according to the application target:
1, filter for fresh air disposal: the new wind used to pollute the air conditioning system is its new and novel disposal, the application of initial effect, medium efficiency, high efficiency, strict and efficient, occasionally also apply high-efficiency filter to dispose of fresh air, if the production produces A chemical filter is required when requesting removal of chemical purification.
2, indoor air supply filter, weekday used to pollute the air conditioning system at the end of the filter, weekday application sub-efficient, efficient, ultra-efficient or ULPA + chemical filter or HEPA + chemical filter.
3, exhaust filter: in order to avoid the purification of the product produced in the production process of the clean room.
4, the clean room is equipped with a built-in filter, which refers to the alternative filter inside the clean room to achieve the required thorough cleansing grade through the reincarnation method, common application efficient, ultra efficient or HEPA + chemical filter or ULPA + Chemical filter.
5, manufacturing and installation equipment interior filter, which refers to the combination of manufacturing equipment and equipment, air filter, HEPA, ULPA or HEPA + chemical filter or ULPA + chemical filter on weekdays, such filters and The filter material of the above filter has a large difference in construction manner.
Second, follow the classification of the air filter size is more familiar and commonly used as follows:
1. The coarse filter is considered from the important first-class filter for polluting the air-conditioning system. It should detain large-volume particles in the atmosphere. The filter tool is more than 5um of suspended particles and 10um or more of small particles and various foreign objects. , to avoid entering the system, so that the compliance of the coarse filter is based on 5um filtration, the ordinary coarse filter is easy to wash and change the coarse and medium-porous non-woven filter material, etc., to avoid the application of oil-immersed filter .
2, medium efficiency filter, because there are pre-filters behind it to retain large size particles, it can be used as the end filter of the ordinary air conditioning system and the pre-filter of the high efficiency filter in the pollution air conditioning system, so it is important to detain 1-10um of suspended particles, its compliance is therefore subject to 1um filtration.
3, high-efficiency filter can use the end of the filter of the general pollution level system, can also better maintain the high-efficiency filter in order to improve the pollution of air-conditioning system pollution results, and use the central filter, so it is important to detain 1 -5um of suspended particles, its compliance is also based on the filtration of 1um particles.
4, high-efficiency filter can be used as a dust-free workshop at the end of the filter, according to the request to reach a certain level of cleanliness, can also be used as a pre-filter for high-efficiency filters, further improve and ensure the cleanliness of the air supply, but also As the final filtration of the fresh air of the polluting air-conditioning system, the quality of the fresh air is improved, so that it is as important as the high-efficiency filter, and it is important to retain the fine particles of 1 um or less, and the compliance should be based on the filtration of 0.5 um particles.