The first category: Passive purification type (filter purification type)
The main principle is: use a fan to draw air into the machine, and filter the air through the built-in filter. It can filter dust, odors, toxic gases and kill some bacteria. Filters are divided into: dust collection filter, formaldehyde removal filter, deodorizing filter, HEPA filter, etc. Among them, the more expensive one is the HEPA filter, which can decompose toxic gases and sterilize, especially to inhibit secondary pollution.
The characteristic of this type of product is that the fan function and the quality of the filter determine the purification effect. The placement of the machine and the indoor layout affect whether the purification is complete. The indoor purification effect is uneven and difficult to complete, and the filter replacement cost is relatively high. high. Product representatives: Honeywell and other European brands.
The second category: active purification type (no filter type)
According to the active sterilization principle of these products, they can be divided into silver ion technology, negative ion technology, low-temperature plasma technology, and photocatalyst technology and Plasma Cluster ion technology.
First generation, silver ion purification technology. Simply put, it is to ionize silver blocks and blow them into the air to achieve a sterilizing effect. The disadvantages are high product cost, low bacterial killing rate, and almost no killing properties against viruses. Product Representative: Early Panasonic products.
Second generation, negative ion technology. The main principle is to use static electricity to release negative ions, which absorb and concentrate dust in the air to reduce dust. At the same time, negative ions also ionize oxygen in the air into ozone, which has a certain killing effect on bacteria. The advantage of this type of product is the production cost. lower. Product representatives: Yadu, Philips.
Third generation, low-temperature plasma technology. The main principle is that by applying an external voltage to the gas to the discharge voltage of the gas, the gas is broken down, generating various strong oxidizing low-temperature plasmas, and decomposing the pollutants in contact in a very short time. This technology is generally used for industrial waste gas treatment. Secondary pollution is produced after chemical reactions. If it is applied to household air purifiers, human safety testing and corresponding secondary pollution treatment technology are required.
The fourth generation, photocatalyst technology. Photocatalyst is actually a technology that uses semiconductors to release free radicals with strong oxidizing power under the irradiation of light. The advantage of this technology is that the product cost is low, but the disadvantage is that the free radical activity causes it to stay in the air for a short time, and its killing effect on viruses and bacteria is also limited. Product Representative: Daikin.
New generation PURE new air purification technology:
1. Adopt the world's first patented "catalytic formaldehyde removal" technology.
2. The first "manganese-based material series catalyst" to catalyze or oxidize harmful gases such as formaldehyde and toluene. "Catalysis or oxidation of formaldehyde" in a solid state manner.
3. The first cold-temperature catalysis (oxidation), which converts formaldehyde into harmless gases at room temperature; catalysis can occur at 5 degrees.
4. The specific surface area of ??the catalytic material is as high as more than 130, which can catalyze or oxidize while having high adsorption capacity.
5. The total formaldehyde removal efficiency reaches over 98%. The efficiency of removing absorbable materials is over 98%.
It only takes 5 hours to completely solve the formaldehyde odor problem, allowing you to move in after the decoration is completed. You no longer need to use lengthy ventilation methods to remove formaldehyde.
The third category: dual purification (active purification + passive purification)
Traditional air purification brands: (1) Sharp (filter + ion cluster technology); (2) ) Blueair (filter + negative ion technology); (3) Philips (filter + negative ion technology).
Upstart air purification: PURE air purifier, PURE car air purifier