How does an air purifier filter filter dust?

The problem of environmental pollution is becoming more and more deeply rooted in the hearts of the people, and everyone can avoid it, air purifiers, drinking water purifiers, etc., will enter our lives.

I don't bring goods, so don't ask me which brand of equipment is better; I will only talk about popular science here, and talk about the "hidden" scientific principles required by the subject. The core technology of the air purifier - the filter working mode, whether it is an air purifier installed in the Great Hall of the People, or a treasure to engage in the first yuan free shipping products, in fact, their working principles are based on the removal of particulate objects in the air technology, as long as there are the following:

Mechanical filter type, electrostatic electret filter type, high-voltage electrostatic dust collection, negative ion and plasma method. To put it simply, while directly filtering on the filter screen, adding various external equipment and facilities, improving work efficiency, and prolonging the working life of the equipment are all different.

When students make choices, looking at these complicated parameters, it is not very useful. According to the principle of what you pay for, in the field of emerging electronic environmental protection equipment, it is very easy to be harvested as leeks.

How the filter works.

Intuitively, do students think that filtering dust and fishing with fishing nets can be directly compared? Does the merchant claim that the finer the filter used, the more advanced and effective the dust removal and freshness effect it has? The answer, of course, is not!

Because the reason why dust is called dust is because it is so small that it can no longer be viewed from the perspective of macroscopic things. The truth is that most microscopic particles are not stuck on the top of the filter because they are actually larger than the mesh, but are adsorbed on the filter fibers.

When the air purifier's fan pushes air through the filter, the airflow continues around the filter fibers, and the dust is also carried by the airflow in an attempt to wrap around the filter fibers. If the dust particles are relatively large, their own inertia will be large, and the bending will not be flexible, and it is easy to be stuck by the filter; The smaller the dust, the smaller the inertia, and it is easy to escape the capture of the filter fibers with the air flow. At this point, it seems that everything is the same as catching a fish with a net.

However, if the aerodynamic diameter of the dust is less than microns, the particles of this size will have obvious Brownian motion, instead of being aerodynamically dominant, and because of their small mass, they are more likely to be attracted to the filter fibers.

To put it simply, large particles will hit the filter headlong due to their own inertia; Very fine particles are easily attracted to the filter fibers and captured. Both types of dust are easily captured by the filter material. The most difficult are the particles with a diameter of just about microns, which we generally call the filter screen is the easiest to penetrate the particle diameter, and they are the most difficult to be intercepted and filtered by the filter.

The filtration strength of this size is the hallmark parameter that shows the true talent and practical learning ability of the filter element.

There should be a dense layer of Internet café that can block the entry of dust.

It is a very dense Internet café that is able to block the entry of dust.

The air filter filters the dust through a small void on it.

The space above the filter is relatively small, which can keep out dust.

It can filter out the dust and make the air fresher.

Through the adsorption of dust, it allows it to filter dust.

By filtering the size of the dust.

It is filtered out by adsorbing dust.

A very dense internet café is able to keep out the dust.

Summary: Yes.

1. Primary filter.

This is also the first layer of filter in the air purifier purification system, which mainly intercepts pollutants with large particles of dust, hair, and dander. It is the most dirty filter in an air purifier. In terms of material, most of the primary filters are made of various specifications of wire mesh, and cleaning with water will not cause damage to the filter itself, and most of the primary filters can be directly cleaned with water.

2. HEPA filter.

The HEPA filter is the most important component of the air purifier to filter fine particles, bacteria and various allergens, but the HEPA material itself is made of paper and generally cannot be washed. If the HEPA filter wants to be cleaned, it is best to buy a new filter of the same model, which will not only not affect the work of the product, but also be as large as the initial purification effect of the product.

3. Activated carbon filter.

It mainly removes volatile organic compounds formaldehyde, toluene, hydrogen sulfide, chlorobenzene and pollutants in the air, and also plays a role in deodorization and odorization. If you want to wash the activated carbon filter, the water temperature should not be higher than 50 degrees, so as to ensure that the activated carbon will not be deformed by high temperatures. In addition, neutral detergents can be added to clean, and strong acids and alkaline detergents must not be used to avoid chemical damage.

Introduction:

Air purifiers, also known as "air cleaners", air purifiers, and purifiers, refer to products that can adsorb, decompose or transform various air pollutants (generally including dust, pollen, odor, formaldehyde and other decoration pollution, bacteria, allergens, etc.), and effectively improve air cleanliness, mainly divided into household, commercial, industrial, and building products.

Hello, the filters of air purifiers can be cleaned, but not all filters can be cleaned. At present, the mainstream configuration of air purifiers is the triple filter of pre-filter, HEPA filter, and activated carbon filter. Each layer of filter has a different function and configuration, and the way it is cleaned and maintained is also different.

Taking IAM's air purifier as an example, the first coarse filter can be rinsed with water and can be used after drying, while the second filter cannot be cleaned and replaced in time according to the alarm of the machine.

I've washed it with water. Can I still use it?

We can remove the filter and clean it with clean water, so that the filter can be cleaned. However, because it is more troublesome to remove the filter from the air purifier, we must be careful during the disassembly process, otherwise it is easy to damage the air purifier. Moreover, the edges of the air purifier are also relatively sharp, so we must also pay attention to safety during the disassembly process, and be careful not to cut our fingers.

Before disassembling the air purifier, you must remember to turn off the power, otherwise it is easy to get an electric shock. And if we need to disassemble the air purifier, then be sure to read the instructions carefully. Because there are many types of air purifiers on the market, each air purifier is disassembled in a different way.

If we disassemble the air purifier at will, then there is a possibility that the air purifier will be damaged.

If the filter is full of dust, it will definitely affect the use of the air purifier, and even affect the service life of the air purifier, and it may also make our indoor air quality become worse and worse, so the air purifier should be removed and cleaned after a period of use. In fact, many people like to place air purifiers indoors, but if the air purifier filter is not cleaned frequently, then the indoor air quality will become bad.

Now there are all kinds of air purifiers on the market, so when we buy air purifiers, we must not be greedy for cheap, because many ** cheap air purifiers are generally not very good quality. And some fake air purifiers** are also very cheap. In our best attempt to buy the most expensive air purifier.

This kind of air purifier must also have a relatively long service life, and the quality is definitely very good. Don't buy a miscellaneous air purifier either, this kind of air purifier is not very good quality.

You can take off the filter element and clean it, if the conditions in the home are better, you can also replace it with a new filter element, this filter element needs to be cleaned frequently, otherwise it will be difficult to clean.

The filter in the air purifier can be removed for cleaning, or the filter can be replaced and put back into use.

It is necessary to find professional personnel to repair it, and also replace the filter element in time. This is reasonable and safer.

Air purifiers have many functions, such as purifying the air, disinfecting and sterilizing, etc. So do air purifiers filter dust? PChouse will take you to find out.

An air purifier absorbs dust from the air. Filtering dust is a relatively basic function in the air purifier, and it can also remove some pollutants such as particulate matter and hair, and the removal rate can generally reach more than 90%.

An air purifier can have an electrostatic precipitator effect. There is a lot of dust smaller than cells in life, as well as bacteria and smoke inhaled for a long time, and such air can easily cause lung disease, liver cancer, lung cancer and other diseases. At this time, an air purifier is used, which can have a removal effect on dust smaller than microns.

But try not to use ordinary purifiers, such as using filter paper to filter the dust in the air, such air purifiers are easy to block the filter holes, not only can not have the effect of sterilization, but also easy to cause secondary pollution.

If you don't have particularly high requirements for air quality, you can choose a purified air purifier, which is suitable for people with moderate indoor humidity, and you can buy such an air purifier to meet your daily needs.

1. Filter out dust, debris and moisture in the air, make the air in the engine clean, reduce the wear of moving parts such as engine cylinders, pistons and crankshafts, and prolong the life of the engine;

2. Reduce the air intake noise and wide draft. It is an effective intake muffler for the engine, which is the volume inside the air filter because of the air filter, which can be used as the expansion cavity of the expansion muffler;

3. The filter element of the air filter is also a good sound-absorbing material for resistive mufflers.

From Truck Home users.

The air purifier has been used for a long time, and the internal filter is easy to get dust. How do you clean the air purifier filter? PChouse will take you to find out.

1. The pre-filter is simple to clean: the household air purifier filter has a pre-filter, which is usually more suitable to be cleaned once or twice a month. Every time you clean up, you just need to disassemble it and use a vacuum cleaner or rag to remove the dust.

Some pre-filters can also be rinsed directly under the water pipe, or gently brushed with a soft brush, spun dry or dried with a hair dryer, and then installed in the air purifier.

2. The HEPA filter cannot be washed: the filter screen using HEPA technology cannot be washed if there is no specific indication, but in the current serious indoor air pollution situation in China, the longest life of the HEPA filter is generally only 3 months or even shorter, which means that the HEPA filter needs to be replaced frequently. The cost of this filter is relatively high, and timely cleaning in daily use can prolong the use time, but when the color of the filter is black, it must be replaced as soon as possible.

The air purifier filter can be cleaned by pre-filter, carbon filter, and HEPA filter.

1. Pre-filter

The pre-filter is the outermost layer of the filter, generally cleaned once every two months, the place with poor air quality can be considered to be cleaned 1 to 2 times a month, remove the filter screen when cleaning, clean up the dust with a vacuum cleaner or rag, if the filter indicates that it can be washed, it is recommended to wash it with clean water, and then spin it off or use a hair dryer to dry it and then install it back into the air purifier.

2. Activated carbon filter

Activated carbon filters also need to be replaced frequently, as activated carbon will reach saturation after a period of use and will no longer adsorb contaminants. It is best to replace it once every six months, or you can regularly take out the activated carbon filter and expose it to the sun, so that the pollutants inside the activated carbon can be discharged, so as to maintain its purification effect and prolong the service life of the filter.

3. HEPA filter

If the filter screen uses HEPA technology, it is generally not washable if it is not written that it can be washed. Because the air pollution in the United States is more serious, the life of HEPA filters is generally only 3 months, and some have a shorter lifespan, so HEPA filters need to be replaced frequently.

What an air purifier does:

The main thing is to purify the air of harmful substances. Under normal circumstances, the polluted air contains a large number of suspended particles, haze, formaldehyde, carbon dioxide and other substances, and the air purifier can effectively remove the pollutants in the air through the relevant purification principle and the mode of filter interception and purification, so as to achieve the purpose of purifying the air.

Air purifiers, on the other hand, filter the air mainly by the filter. Although many ordinary air purifiers on the market can also purify the air, they are mainly aimed at dust, suspended particles and other substances, and it is difficult to get rid of the more serious pollutants.

Moreover, a simple air purifier only has the function of filtration, although it can ensure the freshness of indoor air, but it is difficult to improve air freshness and comfort.