Air filtering material tester

Abstract

The invention relates to an air filtering material tester which comprises a high efficiency filter, a corona neutralizer, a filter clamp, an aerosol generator, a laser particle counter, a differential pressure meter and a computer, wherein an outlet of the high efficiency filter is respectively connected with an inlet of the corona neutralizer and an inlet of the aerosol generator through pipelines, and an outlet of the aerosol generator is connected with the inlet of the corona generator through a pipeline; the filter clamp is formed by hermetically assembling an upstream clamp and a downstream clamp, wherein the upstream clamp comprises an air inlet pipeline and an air inlet chamber, the downstream clamp comprises an air outlet pipeline and an air outlet chamber, and the outlet of the corona neutralizer is connected with the air inlet pipeline of the upstream clamp; the laser particle counter is connected with the air outlet pipeline of the downstream clamp, and the differential pressure meter is respectively connected with the air inlet chamber and the air outlet chamber; and the laser particle counter and the differential pressure meter are respectively connected with the computer. The air filtering material tester has the advantages of high detection efficiency and sensitivity and fully-automatic control of detection process.

Description

technical field [0001] The invention relates to an air filter material tester. Background technique [0002] The testing methods specified in GB6165-85 and GB13554-92, which are currently used in my country, are sodium flame method and oil mist method. At present, the sodium flame method is generally used in China, and some military units continue to use the oil mist method consistent with the former Soviet Union standards. However, judging from the current detection methods, the diameter counting method is the most stringent method for testing high-efficiency filters, and it is a general trend to replace other traditional methods with this method. However, in our country, the diameter counting method has not been promoted, which has caused obstacles to the quality of the air filter products produced in our country being recognized by international counterparts and entering the international market. [0003] Domestic test benches only have oil mist method and sodium flame ...

AI Technical Summary

Problems solved by technology

This kind of test bench is inconvenient to operate and the detection cycle is long, which increases labor intensity and production cost, making manufacturers unwilling to use this method to carry out one-by-one testing.

Therefore, the high-efficiency filters produced by various domestic factories have low reliability in terms of filtration efficiency or experience value or sampling efficiency value, which is not conducive to market matching selection.

Especially if inappropriate or even unqualified products are selected in industries with high cleanliness requirements, it will bring huge losses to the industry. It is the existence of these hidden dangers that make many industries prefer to choose more expensive imported products, thereby limiting The development of domestic filters

The scale of the domestic filtration industry is still slightly insufficient, and imported test benches or some key components are expensive and inconvenient to maintain, so the domestic filtration industry has insufficient motivation to use imported test benches

At present, only a few large high-efficiency filter material manufacturers in China use imported instruments, but this instrument is produced according to the standard NIOSH42CFRPART84 (GB2626-2006), not according to relevant standards such as high-efficiency filter material (EN1822)

According to the data analysis of the company's relevant instruments, the particle size of the instrument can only detect the data with a particle size of 0.3 μm, which does not meet the filtration efficiency of the most permeable particle size (MPPS) point required by high-efficiency filter materials.

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