What are the parts of the air filter in an air purifier? Are air filters expensive to replace?

Air purifiers in theAir FilterWhat are the parts that make it up?Air FilterIs it expensive to replace?

At present, no matter the air purifier, air sterilizer, car purifier, smart towel dispenser and other air purification equipment, most of them are using filter technology. But many people know less about filters, and some people even don't know that filters are a kind of consumables that need to be replaced regularly. So based on this, today I have summarized some knowledge about the filter of the air purifier to help answer your questions.

I. Filter composition

First, I will give you a brief description of the composition of the filter: the filter generally has three layers, respectively, coarse filter, HEPA filter and activated carbon:

1, coarse filter is generally non-woven fabric, wire mesh, nylon mesh, etc., can only filter the relatively large diameter particles of dust;

2, HEPA (high efficiency filtration) filter, it is the standard for 0.1 and 0.3 micron (1 meter = one million microns) particles interception effect must reach 99.9%, HEPA filter level can be G1-G4, H10-H14, u15-u17, in the country is the most common H10-H14 level of HPA filters, because the indoor air is circulating filtration, so the level of high and low on the filter effect will not be too big a difference, and the higher the level of power, the higher the noise will be. So the difference between the level of filtration effect will not be too big, and the higher the level of power, the higher the noise will also be higher, HEPA filter is mainly used to adsorb particles;

3, activated carbon, activated carbon is used to adsorb the pollutants in the gas, there are columnar activated carbon and clamped carbon cloth on the market these types of activated carbon, columnar activated carbon is more mainstream.

Because the filter cartridge belongs to the consumables, there is a service life, need to be replaced regularly, how long is the life? Replacement to spend how much money? This is based on the use of the situation to determine, such as air pollution is more serious use more frequently, which will certainly have a direct impact on the service life. The service life of the filter is generally written on the product description of each brand, basically in 3 months to 18 months.

II. Filter costs

The last space to talk to you about the cost of the cartridge, so that we have a more intuitive understanding of the cost of filter replacement. Currently on the market cartridge, cheap dozens of dollars, expensive thousands, we can not just from the price to judge what cartridge is good, but should be viewed from 2 aspects:

1, according to the cartridge and air purification equipment to calculate the cost of the whole machine comparison, and can not just look at the price of the cartridge, the cheaper the air purification equipment, the cartridge price is relatively speaking, certainly cheaper, to give you two examples will be able to illustrate the problem. For example, the cartridge 200, air purification equipment 1600, equivalent to the cartridge is the air purification equipment 12.5%; then for example, the cartridge 100, air purification equipment 500, the cartridge is the air purification equipment 20%; you can say that the cartridge 100 cheaper than the cartridge 200?

2, in addition to price, but also to look at the service life of the cartridge to; different brands of different models because of the use of different materials of the filter, its service life will certainly be different; cartridge service life is generally in the 3-18 months, if you only look at the price does not look at the service life, it will certainly also have a direct impact on the acquisition of air purification equipment expenses. For example, who is more cost-effective to buy a 100-priced cartridge that is changed in 3 months and a 200-priced cartridge that is changed in 12 months? As long as learned math know, certainly the latter cost-effective, because 3 months a change of 100 price cartridge to use a year to change 4 times, calculated the cost of a year to 400.

So from the above 2 points of view, the cost of the filter to focus on the cartridge and air purification equipment machine price ratio, and the service life of the cartridge, these two points is the real decision on the cost of the cartridge cost how much the core.

The above is to give you a brief account of the air purifier cartridge information, I believe we all have a basic concept of the cartridge and related cost standards!

----- extended reading

Currently on the market filters are mainly divided into: primary and secondary filters, HEPA filters, traditional activated carbon filters, loaded activated carbon filters, electrostatic dust collection filters, precious metal catalytic filters, non-precious metal catalytic filters, photocatalyst filters, multi-functional filters and so on. Because there are many types of filters and the good and the bad, so the choice of filters to do a good job to fully understand!

1. Dust removal direction

In the field of dust removal, electrostatic dust removal and filter dust removal game for nearly a hundred years. These two technologies can be said to have their own advantages, the filter has a high filtration efficiency but wind resistance; electrostatic dust removal can be washed, but the efficiency is generally not more than 85%, and easy to produce ozone and other issues. So for civilian air purifier, HEPA filter is the most mainstream choice and development direction.

2. Direction of virus extermination

Although high-efficiency HEPA filters can filter bacteria, but for smaller viruses are useless; after solving the problem of energy consumption and by-products, low-temperature plasma and viruses have a chemical reaction, the virus is degraded, so as to kill the virus, so the technology may become the future direction of development.

3、Bactericidal de-mite direction

It is expected that the next generation of filters will be developed by compounding functional materials and resins into multi-functional filters to further improve indoor and vehicle air quality. For example, sub-micron / nano-tourmaline powder and polypropylene resin composite melting, spinning and netting, so as to prepare the release of negative ions with the function of air filters; sterilization masterbatch and polyester resin composite melting, spinning and netting, so as to prepare the function of sterilization mite air filters, and so on.

4. Multi-technology synergy direction

Based on the characteristics of low concentration and variety of pollutants in indoor and vehicle, the application development of multi-technology synergistic purification filters is an important direction for future development. Such as the synergy of adsorption and catalysis, the adsorption material creates a localized high-concentration environment for the catalytic material to increase the contact probability between pollutants and catalysts and improve the purification efficiency. Such as photocatalysis and plasma and adsorption catalytic material synergy, photocatalysis and plasma for adsorption catalytic material to provide active oxygen species, improve the purification efficiency of adsorption catalytic material and so on.