G4 Pre Air Filter For Havc
G4 Pre Air Filter For Havc Technology mainly adopts filtration separation method: by setting up filters with different performances, suspended dust particles and microorganisms in the air are removed, that is, dust particles are captured and intercepted by filter materials to ensure the cleanliness of the air volume. Require. The filter material used is fiber with a smaller diameter, which can not only allow the air flow to pass smoothly, but also effectively capture dust particles.
Granular pollutants suspended in the air are composed of solid or liquid particles. Atmospheric dust can be divided into narrow sense atmospheric dust and broad sense atmospheric dust: narrow sense atmospheric dust refers to solid particles in the atmosphere, that is, real dust; the modern concept of atmospheric dust includes polydispersed aerosols of both solid particles and liquid particles. Specifically refers to suspended particles in the atmosphere, with a particle size less than 10 μm. This is atmospheric dust in a broad sense. For particles larger than 10μm, because they are heavier, after a period of irregular Brownian motion, they will gradually settle to the ground under the action of gravity, which is the main target of ventilation and dust removal; 0.1---10μm in the atmosphere Dust particles also move irregularly in the air. Because they are light in weight, they easily float with the airflow and are difficult to settle to the ground. Therefore, the concept of atmospheric dust in air cleaning technology is different from the concept of dust in general dust removal technology.
Except for the tiny droplets that are spherical, the suspended particles in the air are in the form of crystals, flakes, blocks, needles, chains, etc. It is difficult to measure their size from their geometric shape. In clean technology, the meaning of particle size refers to a certain length dimension passing through the interior of the particle. It does not contain the meaning of a regular geometric shape. It is just a "nominal size" that facilitates comparison of particle sizes.
Suspended particles in the air are divided into non-biological particles and biological particles: non-biological particles are produced by the crushing, evaporation, combustion, and condensation of solids and liquids, and their formation process involves physical or chemical effects. Biological particles include microorganisms, plant pollen, fluff and fluff, etc. Microorganisms generally include viruses, Rickettsia, bacteria, fungi, protozoa and algae. Among them, bacteria and fungi are more directly related to purification. Microorganisms in the air mainly adhere to dust, so filtering out dust in the air can effectively remove microorganisms in the air, which is also the main theoretical basis for biological purification.
The number of particles in atmospheric dust decreases significantly as the particle size increases, that is, on a logarithmic coordinate chart, the number and particle size are linearly related, especially for 0.1---5μm; the distribution relationship between quantity and mass, submicron The number of grade particles accounts for nearly 100% of the total, while the weight only accounts for 2%-3% of the total.
— Air filtration technology mainly adopts filtration separation method: by setting up filters with different performances, suspended dust particles and microorganisms in the air are removed, that is, dust particles are captured and intercepted by filter materials to ensure the cleanliness of the air volume. Require. The filter material used is fiber with a smaller diameter, which can not only allow the air flow to pass smoothly, but also effectively capture dust particles.
— The dust controlled and filtered by clean technology is generally 0.1---10μm dust particles, with a small particle size, including solid particles and liquid particles; organic particles suspended in the atmosphere include microorganisms, plant pollen, fluff and fluff, microorganisms Generally include viruses, rickettsiae, bacteria, fungi, protozoa and algae. Air purification mainly controls bacteria, fungi, and viruses. Because microorganisms mainly adhere to dust particles, effectively controlling dust particles in the air can also effectively control bacteria, fungi and viruses in the air. To do this, it must be filtered through a particulate filter with barrier properties. Generally speaking, the filtration efficiency of ordinary high-efficiency filters for bacteria can reach 99.996%, which can basically meet the filtration and purification requirements of biological clean rooms.
There are five main functions of the filter layer in capturing particles:
— Interception effect: When particles of a certain size move near the fiber surface, the distance from its center line to the fiber surface is less than the particle radius, and the dust particles will be intercepted by the filter fiber and deposited.
— Inertia effect: When the particles have a large mass or speed, they collide on the fiber surface due to inertia and are deposited.
— Diffusion effect: Particles with small diameters have strong Brownian motion and are easy to collide with the fiber surface.
— Gravity effect: When particles pass through the fiber layer, they are deposited on the fiber due to gravity settlement.
— Electrostatic effect: Fibers or particles may be charged, producing an electrostatic effect that attracts particles and attracts particles to the fiber surface.
As more and more dust is collected, the filtration efficiency of the filter layer also decreases, and the resistance increases; when it reaches a certain resistance value or the efficiency drops to a certain value, the filter needs to be replaced in time to ensure Purification cleanliness requirements.
G4 Pre Air Filter For Havc of filter materials are: non-woven fabrics, chemical fiber materials, and glass fiber materials; under rated air volume, they have small resistance and high efficiency, are easy to replace and maintain, and have a wide range of applications. They are used in air conditioning purification systems It has extremely high use value and application fields.
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