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Якая сувязь паміж эфектыўнасцю і аб'ёмам паветра фільтраў сярэдняй і высокай эфектыўнасці?

Час: 2022-07-28

To explore what is the relationship between efficiency and air volume of middle and high efficiency filters, we must first understand what is a primary filter, which is used for primary filtration of air conditioning system, mainly for filtering dust particles above 5μm. There are three types of primary filters: plate type, folding type and bag type, with paper frame, aluminum frame and galvanized iron frame, non-woven fabric, nylon net, activated carbon filter material and metal hole net, etc. The protective net has double-sided sprayed wire mesh and double-sided galvanized wire mesh.

SFFILTECH medium efficiency filter is mainly used in central air conditioning and centralized air supply system. It can be used for the intermediate filtration of air conditioning system and effectively prevent the protection of the filter gauge life of high efficiency filter. The medium efficiency filter is also divided into medium efficiency bag filter, plate type medium efficiency filter, medium efficiency box type filter, non-spacer medium efficiency filter and spacer medium efficiency filter.

SFFILTECH high efficiency air filter media uses H13-H14 or U15-U17 American HV glass fiber filter paper, different media will directly affect the price cost of high efficiency filters. Since the filter media of fiber type high efficiency air filters are fragile and the use occasions are important, countries adopt the method of 100% permeability inspection for the products one by one. In this way, it is required that the test should be non-destructive, that is, the aerosol used should not have a significant destructive effect on the filter. Since the object of high efficiency filter filtration is small particles of submicron level, so it should be easy to penetrate the tiny particles in order to make the test results have practical significance.

Under the rated air volume, according to the standard GB/T14295-93 "air filter" and GB13554-92 "high-efficiency air filter", high-efficiency air filter primary filter air conditioning filter filtration efficiency indicates the rate range as follows.

A, the primary air filter, for ≥ 5 micron particles, filter efficiency 80>E ≥ 20, the initial resistance ≤ 50Pa

B, medium efficiency filter, for ≥ 1 micron particles, filtration efficiency of 70>E ≥ 20, the initial resistance ≤ 80Pa

C, sub-efficient filter, for ≥ 0.5 micron particles, filtration efficiency E ≥ 95, initial resistance ≤ 120Pa

D, high-efficiency filter, for ≥ 0.5 micron particles, filtration efficiency E ≥ 99.99, initial resistance ≤ 220Pa

E, ultra-high efficiency filter, ≥ 0.1 micron particles, filtration efficiency E ≥ 99.999, initial resistance ≤ 280Pa

SFFILTECH air filter resistance and filtration efficiency relationship: the fibers make the airflow around, resulting in a small resistance. The sum of the resistance of countless fibers is the resistance of the filter. Generally speaking, the resistance and filtration efficiency of high-efficiency air filter are proportional to each other, and the air flow corresponding to high resistance is smaller, and the air capacity filtered per unit time is smaller. The air filter produced by our company has 3-5 times more air flow than ordinary high efficiency air filter with the same filtration efficiency.

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