HEPA stands for High Efficiency Particulate flame. These filters are heavily air cleaner and vacuum cleaner. Hepa, has already been developed and used by the U.S. Atomic Energy Commission in 1940 to prevent the spread of radioactive contaminants in the air. E 'was used in the Manhattan Project developing the atomic bomb. It 'been a gadget classified at the end of World War II, after which it is not classifiedand released for commercial purposes.
HEPA air filters are manufactured by a number of different manufacturers. It must be clean can distinguish between a true HEPA and as a cleaner HEPA. While the latter are cheaper, the former are more expensive but come with a warranty. Some filters can also replace parts frequently and are therefore not really cheap in the long term.
HEPAshould theoretically 99.97% of pollutants with particles that stop less than 0.3 microns. This was determined by standard EN 1822 [European standard] test. The efficiency of the cleaner will also depend on its position, that is, if it is before or after the engine. In the case before the engine is, the coal dust from her preparation also captured. Some of the cleaners are equipped with a source of UV light to destroy bacteria and other viruses such as influenza virustoo. The Clean Air Delivery Rate [CADR] varies from model to model.
These air filters are different from others. While this work with ultraviolet light and ionizers, HEPA physically remove the particles. The filter acts not only as a sieve for particles. Instead, the purification by three methods, distribution, monitoring and impact is concerned.
Interception occurs when a particle is the distance of a particleRadius around a fiber filter and crashes. Not work if the distance is greater. The spread is better for smaller particles. Collision of particles in the air constantly. As a result, traveling with a zig-zag motion. The smaller the particle, one more zig-zag and the slower is its progress in the stream. Job impact, if a particle is so large that not adapt to sudden changes into the filter. Because of the inertia thatParticles is chosen his path, visitors, and is trapped by the fiber filter. Therefore, the chances of meeting the fibers of the filter are larger. It must be emphasized that the effectiveness of these filters for particulate matter and can not rely on a healthy environment.
My Links : mastercard gift card
แสดงความคิดเห็น