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Classification of filter screen grade, principle and material of fresh air system

2022-01-15 02:15:14
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In addition to ventilation, the important function of household fresh air fan is to filter pollutants in the air, so the filter screen of fresh air system is a key link in all systems. Fresh air manufacturers, and the quality of the filter screen immediately endangers the air quality in the room.

According to the level, basic principle and materials, the filter types of the fresh air system can be divided as follows:

1、 According to the filtration standard

General household fresh air fan filter screen can be divided into three levels, namely, primary efficiency filter screen, medium efficiency filter screen and efficiency filter screen.

1. Primary effect filter screen: filter outdoor large particles, dust, small insects and other chemical substances.

2. Medium efficiency filter screen: filter outdoor bee pollen and other small particle chemicals.

3. Efficiency filter screen: namely HEPA, achieving HEPA standard filter screen.

3、 Classified by filter material

家用新风机

1. Non woven fabric filter screen: alias polyester fiber fabric, alias non-woven fabric. Non woven fabric has the process characteristics of rich application, technical originality, good reliability and so on. It is a typical filter material for flat and one by one filters at the current stage in China. The production and processing technology is made of melt blown, needle pricking, spunbonded and other processing technologies through multiple processes. Compared with other filter materials of the same grade, it has the advantages of stable quality, large dust capacity, strong moisture resistance, long service life, durable economic development and so on. Non woven fabrics are also filter materials at the beginning of operation. In recent years, due to the continuous development of technology, the emergence of composite non-woven fabrics has greatly improved the low-end brand image of non-woven fabrics, and has long been able to achieve sub efficiency in efficiency.

2. Glass fiber filter screen: glass fiber filter screen is made of various sizes and lengths of glass fibers through a unique manufacturing process. Glass fiber has the characteristics of stability, heat resistance, high efficiency, large space and long service life. And under some unique conditions, only the wave line can serve. It is widely used in primary filter, heat-resistant filter and efficiency filter of general exhaust system.

家用新风机

3. Man made fiber filter screen: it can replace non-woven fabric and glass fiber in many directions in the general filtering natural environment, and cover the filtering commodities of coarse, medium and efficient products. It is a newly emerging filter material and a specific development prospect of filter materials in the future. Compared with other filter materials at the same level, it has the advantages of low friction resistance, light weight, large volume, environmental protection (can be incinerated), moderate price and so on.


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