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中文简体Generally speaking, a True HEPA filter can remove airborne viruses and bacteria. However, it also has some drawbacks. Whether you are considering purchasing a True HEPA filter for your home or office, it is important to understand what it is, what it does, and how it works.
The True HEPA filter is a filter that utilizes diffusion and impaction mechanisms to trap particles. The diffusion mechanism is largely responsible for the filter's ability to trap smaller particles. This is done by the diffusion of ultrafine particles, which are smaller than 0.3 microns, across the filter fiber. In addition to diffusion, impaction can occur when larger particles are smashed against the filter. This can lead to air escaping around the fibers. However, it will also result in a reduction in filtration efficiency.
The diffusion mechanism is the main part of a True HEPA filter. The diffusion process occurs when the ultrafine particles move in a volatile fashion. The particles can then be attracted to the fiber by an electrostatic attraction. They will also zigzag around in an "Brownian Motion" like manner. This means that they will be less likely to stick to the fiber and will be able to follow the streamline. This allows the True HEPA filter to capture the smaller particles.
This is the minimum filtration efficiency that a True HEPA filter can achieve. Although 0.3 microns is the most common size used to measure a HEPA filter's filtration efficiency, there are also filters that are capable of capturing particles as small as 0.2 microns. However, they will generally have a lower MERV rating than a True HEPA filter. In general, the higher the MERV rating, the more effective the filter.
A True HEPA filter will usually be sealed in a metal or plastic frame. The fibers are typically located in the bottom of the frame. The fibers are designed to entrap airborne particles, but they will also be able to capture bacteria and viruses. However, it is important to make sure that the filter has been tested by a third-party organization to ensure that it meets the standard.
Wholesale true hepa filter can remove bacteria, pollen, mold, and viruses. This is important, because airborne bacteria and viruses can lead to respiratory issues. The True HEPA filter is also able to remove harmful toxins. These toxins can lead to illnesses in the long-term and may cause atopic effects in non-asthmatic individuals.
Function: antibacterial, mites removal, odor removal, photocatalyst, cold catalyst
Application scenarios: Offices, shopping malls, schools, public places
HEPA stands for High Efficiency Particulate Air. It is a standard defined and developed by the U.S. Department of Energy during the 1940s as part of their efforts to contain the spread of particles and contamination resulting from nuclear testing. This standard has since moved into the consumer market and has become commonplace for air purifiers.
To meet the HEPA standard, the filter must remove 99.97% or more of all particles which are 0.3 microns (micrometers) in diameter. In other words, for every 10,000 particles that are 0.3 microns in diameter, only three of them pass through.
The HEPA standard traps very small particles,many of which are invisible to the human eye and harmful to your health. To provide perspective for size, human hair is approximately 80-100 microns in diameter.
