In this paper, the author: Cai Jiebo shi Purification by dongguan bo shi arrangement to share.

Users often complain about the service life of the air filter is too short, there are three main reasons for this: first, the air filter filtration material in the area is too small or let dust capacity per unit area is too small; Second, pre filter filtration efficiency is low; In addition, users of the service life of the filter‘s expectations too high.

For the first reason, use large filter area can obviously prolong the service life of the filter, but the practice of the space is not large, you can‘t infinitely increase the filter area. The best design for it, once the project is built, to transform filtering system to prolong the service life is in trouble. xu

In many engineering, user requirements as much as possible to reduce the air conditioning system footprint, or did not notice the supply chamber of commerce in the process of interacting, using cheap filter to reduce the cost, supplier chose to make appropriate, accounts for the filter of the space is little, air filter when acceptance of work meet the requirement of air purification, but due to the area of the filter material of the filter

Is too small, the service life of the filter also can not be extended.

An extreme example, contemporary fab clean room terminal design service life and high efficiency filter for "lifetime", namely: throw people never hold the hearts of the hepa filter after operation. The plant technology with each passing day. A new project put into production after 5 一7 years behind, process must be updated. Workshop to transform, high efficiency filter also scrapped. There, high efficiency filter of "life", that is, seven years, in order to insurance, designers will filter design service life as 10 一20 years. For chip factory level 100. 10 or higher level of clean workshop, common in the process of the filter efficiency level for the H10 (MPPS) 85%, many new projects

Sexual selection HEPAA (> 99. On the efficiency of 0.3 um particles 97%). Designer claims to guarantee terminal hepa filter using "lifetime" its methods.

For clean workshop in grade 10000 and 100000, efficiency bag filter in the filtration had better choose F8 (95% (colorimetry), so, at the end of service life and high efficiency filter generally up to 5 years. Projects abroad and domestic construction projects, the F8 efficiency bag filter is a uniform flow clean room in one of the most common filter. At home the past clean room air conditioning system design, the common configuration of filters are as follows: efficient filter - in effect at the beginning of filter, high efficiency filter. Then at the end of service life and high efficiency filter was only 1 一3 years, the worst is months.

In the central air conditioning system, the service life of main filter is also depends on the pros and cons of the pre-filter ahead