Working principle of air purification equipment of photocatalyst technology: photocatalyst technology is that nano materials change light energy into chemical energy under the irradiation of light, so as to promote the synthesis or degradation of organic matters. Advantages: it has the functions of dust removal and sterilization, and is a widely used technology. Disadvantages: it can only work under the excitation of specific wavelength of UV light. The product has a very short life, and the effect is not obvious. UV light is harmful to human beings, so it is not suitable for human-machine coexistence during purification.
Working principle of air purification equipment of negative ion technology: the main principle of negative ion technology is to use static electricity to release negative ions, absorb and concentrate the dust in the air and play a role in dust reduction. At the same time, negative ions can also ionize oxygen in the air into ozone, which has a certain killing effect on bacteria. Advantages: anion combines with dust and dust particles in the air to produce dust and dust particles with static electricity, which will settle after being attracted by the ground and play a role of purification. Disadvantages: can not eliminate formaldehyde, benzene and other harmful gases.
Working principle of air purification equipment of activated carbon technology: activated carbon purification equipment has the function of dedusting and deodorizing, and can also purify air, but due to the problem of adsorption saturation, it is easy to produce effect attenuation. Advantages: it can absorb the peculiar smell in the air. Disadvantages: formaldehyde, benzene and other harmful substances can not be decomposed through physical, chemical and biological reactions to achieve the purpose of air purification. And it needs to be replaced on a regular basis with constant costs.
Working principle of air purification equipment of ozone technology: ozone technology reacts rapidly to bacteria inactivation and sterilizes thoroughly, but the excessive ozone is harmful to human health. It strongly stimulates people's respiratory tract and can cause adverse reactions such as dyspnea, dizziness and headache. So it is mostly used for industrial waste gas treatment. Advantages: low concentration ozone can kill a variety of pathogenic bacteria, viruses, mycoplasma and microorganisms in the air, water and object surface. Disadvantages: excessive ozone is an invisible killer, which can cause neurotoxicity, dizziness, headache, vision decline and memory decline in adults. Human and machine cannot coexist. Solid particles cannot be adsorbed.
HEPA air purification equipment working principle: HEPA air purification technology is relatively mature dust removal technology at present. HEPA filter can achieve 99.9% filtration efficiency for particles above 0.3 μ m, which is a safe and reliable dust removal technology! Advantages: for particles, dust, bacteria, viruses and other substances above 0.3 μ m, the filtration is effective. Disadvantages: easy to damage, can not be washed with water, must be replaced regularly to continue to use. Maintenance is expensive.
The working principle of air purification equipment of electrostatic precipitator technology: electrostatic precipitator is generally speaking that the electric field formed by high-voltage static electricity absorbs the dust in the air, reduces the dust and purifies the air. However, it can not directly kill viruses and bacteria, decompose pollutants; if too much dust is not cleaned or the efficiency of the electrostatic cleaner is reduced, it is easy to cause secondary pollution. Due to the high voltage discharge, safety protection device should be equipped, which is generally not suitable for use in large public places or indoor places with high requirements for disinfection conditions. It is better not to use it for civil use. Advantages: easy to use. After one or two weeks of use, it can wash out black and dirty water and reduce secondary pollution. There is no need to replace expensive consumables. And can be electrostatic sterilization. The static tungsten wire releases 6 volts of high-voltage static electricity, instantly killing bacteria, viruses and pollen. It is very effective to eliminate cold and various infectious diseases. Disadvantages: after power failure, the dust adsorbed on the electrode will release and cause secondary pollution, so the electrode plate needs to be cleaned regularly.