How are the filters of the fresh air system classified

In addition to ventilation, the most important function of the fresh air system is to filter pollutants in the air, so the filter screen of the fresh air system is the most important part of the whole system. According to the grade, principle and material, the filter type of the fresh air system can be divided as follows:

1. Primary filter 2, medium filter 3, high efficiency filter (HEPA filter).

In the fresh air system, the primary, medium and high-efficiency filters are generally not used separately, but two or three kinds of together.

Physical filtration: The filter material is common from G1 to H13 different levels, the higher the level, the greater the wind resistance, and the more thorough the filtration.

Electrostatic dust collection: the filtration effect is good, the wind resistance is small, and the filter screen does not need to be replaced frequently. The disadvantage is the unavoidable production of ozone.

Among the fresh air systems, the physical filtration method is currently used the most.

1. Non-woven filter 2, glass fiber filter 3, synthetic fiber filter 4, activated carbon filter 5, nano silver filter 6, photocatalyst filter.

Generally speaking, non-woven filters and glass fiber filters are mostly used for primary filtration, while synthetic fiber filters, activated carbon filters, nano silver filters, and photocatalyst filters are mostly used for medium-efficiency and high-efficiency filters.

Now there is also a negative ion fresh air system, which also has a certain role in sterilization and dust collection.

In the fresh air system, the filter can be said to play the role of a barrier. They are divided into three levels: primary filter, intermediate filter and high-efficiency filter, each with different filtration capacity. The primary filter can effectively filter large particles of solid particles such as soot, dust and pollen.

On the basis of the initial effect, the medium filter screen further blocks small and medium-sized particles to achieve further filtration of particulate matter, and has a good filtration effect for particles with a diameter of more than 10 microns (PM10). The most critical part is the high-efficiency filter, which meets the HEPA standard and can filter out particles with a diameter of microns, and its filtration efficiency is high. This means that tiny particles such as smoke, bacteria, dust and so on are reliably kept out of the filter.

With the gradual decline of air quality in the environment where people live, many consumer families will choose to install fresh air systems in their homes. So, do you know what types of filters are available in the fresh air system? Next, let me introduce you to the different types of fresh air system filters.

HEPA filters made of glass fiber are recognized to achieve high efficiency purification effect, and the yield rate is low due to the extremely high production process requirements of glass fiber. The cost of this HEPA filter is also quite high, and it is commonly used in professional-grade air purifiers. At the same time, when the air purifier is not in use for a long time, the purification effect of the HEPA filter using glass fiber will be less degraded.

At present, quite a lot of air purifiers on the market are using PP filter paper HEPA filter, PP sub-high efficiency filter paper is a new type of filter material made of polypropylene as raw material by special hot melt method, the product is acid and alkali resistant, corrosion resistant, high melting point, stable performance, non-toxic, tasteless, uniform distribution, low resistance, high efficiency, high strength and environmental protection. However, the HEPA filter made of PP filter paper has a short service life, and it will also reduce the purification performance after long-term storage.

According to the type, HEPA filter can be divided into PP filter paper, composite PET filter paper, meltblown polyester non-woven fabric and meltblown glass fiber and other materials. However, among these five types of filters, PP filter paper is widely used in high-efficiency air purifiers in junior high schools. Fiberglass HEPA filters, on the other hand, are generally considered to be the most effective in purifying and are often used in professional-grade air purifiers.

HEPA filters are subdivided into G1-G4, F5-F9, H10-H14 and U15-U17 according to the current European grades. The most common in air purifiers is the H level, and this type of HEPA belongs to the high-efficiency filter. The H13-14 filter that is recognized as the best is the high-efficiency air filter.

Among them, the H13 HEPA filter can achieve the total efficiency, and the total efficiency of the HEPA filter can be achieved.

The above is the relevant content of the types of filters for the fresh air system that I have introduced to you. Although the fresh air system filter may not be noticed by everyone, it is undeniable that it is a very important part of the fresh air system. Therefore, I hope that my introduction can make everyone better understand the fresh air system filter bar.

Air conditioner fresh air and filter are both devices used to improve indoor air quality, but their functions and principles are different.

The air conditioning fresh air system can introduce outdoor air and deliver fresh air to the room through filtration and treatment, so as to realize the destruction and renewal of indoor air. In the case of high indoor environmental pollution, such as the release of harmful gases from kitchen cooking, furniture, decoration materials, etc., the air conditioning fresh air system can effectively discharge the pollutants and improve the indoor air quality.

The filter is a filter installed in the air conditioning system, which is used to filter dust, pollen, bacteria and other particles in the indoor air, and purify the indoor air from hail. By regularly replacing the filter, you can prevent excessive dust and other pollutants from entering the room, thereby reducing the harm of the indoor environment to the human body.

It should be noted that although the air conditioning fresh air system and filter can purify the indoor air, it cannot completely eliminate the pollutants in the air, so it is also necessary to pay attention to daily cleaning and ventilation while reducing the emission of indoor pollutants.

There are three mainstream fresh air systems: one-way flow fresh air system, two-way flow fresh air system and full heat exchange fresh air system, these three kinds of fresh air system adapt to different scenarios, each has its own advantages and disadvantages, consumers should choose according to family conditions.

1. One-way flow fresh air system.

When the one-way flow fresh air fan introduces fresh air, a slight positive air pressure will be formed in the room, and the dirty air will be squeezed out of the cracks between the doors and windows. The one-way flow fresh air system is not only used for the ventilation of individual rooms, but also for the ventilation of the whole house. And because the indoor formation of a slight positive pressure state, but also prevent dirty air through the gaps in the doors and windows, as well as the toilet and kitchen exhaust fan leakage into the room, suitable for 70 square meters of residential and office space, simple installation, low operating cost, power saving, quiet.

2. Two-way flow fresh air system.

On the basis of one-way flow, a dynamic exhaust duct system is added, and the exhaust and supply air can be carried out at the same time. Compared with one-way flow, bidirectional flow has a larger processing capacity, and is mostly seen in cabinet fresh fans. The cabinet type fresh air fan is generally larger in volume and large in air volume, the fresh air inlet is generally at the upper end of the machine, and the fresh air is sprayed to the far end to form a positive pressure in the room, and a part of it is discharged from the gaps in the doors and windows, and on the other hand, it forms an air circulation and discharges dirty air from the bottom.

It is suitable for apartments, offices, etc. within 200 square meters, and the installation is slightly more complicated.

3. Full heat exchange fresh air system.

The main engine has added a full heating system, and the preheating and cooling energy exchange is carried out, which can retain most of the energy of the indoor air, and even if the temperature difference is large, it will not greatly affect the indoor temperature. The air supply outlet and exhaust outlet are installed in different positions of the same room, and the fresh air is sent to each room through the pipe, and the dirty air is installed in the exhaust outlet of each room to be pumped out, so that the new convection flow can be installed in each space to ensure the quality of the air. The Rolet fresh air system adopts a large air volume and no volute DC inverter fan, with a temperature exchange rate of 6 percent, which is suitable for undecorated new houses due to the pipeline installation and design, with high cost and no requirement for the area of the applicable house.

There are three main types of filters used, primary filter, high filter, carbon filter, and primary filter, which are usually made of non-woven fabrics, nylon mesh, and metal mesh mesh, and the function is to filter out larger pollutant particles in the air. The main advantages are that it can be reused and easy to clean.

High filter, commonly known as HEPA filter, is mainly made of PP filter paper, glass fiber, composite PP PET filter paper, is a material that can highly filter and purify the air, can remove the air with a diameter of microns below the micron, and will not produce harmful gases, the disadvantage is that the filter needs to be replaced regularly in the later stage, which will produce a certain amount of use costs. The other is the Rolet fresh air fan, which uses electrostatic precipitator to purify the air, and sends the air into the room after purification through the negative ion electrostatic precipitator and H13 filter.

The carbon filter adopts an aluminum honeycomb with a through-hole structure, which has the advantages of better gas dynamics, large surface area and good adsorption capacity. It can adsorb various polluting gases in the air, and also has a good deodorization effect. The disadvantage is that it also needs to be maintained after a certain period of time, and it needs to be placed in the sun for exposure during maintenance, and it can be reused after exposure.

1. The fresh air system provides fresh air The fresh air system provides fresh air for the room 24 hours a day, and there is fresh air from nature without opening the window.

2. Remove harmful gases The fresh air system can remove odors, CO2, formaldehyde, and various harmful gases in the classroom.

3. Reduce noise pollution The school is surrounded by a large amount of fresh air system, so that the classroom is protected from external interference. Rolet fresh air fans use silencing technology to reduce noise and make the learning environment quieter.

Fourth, dustproof The use of fresh air system can reduce the dust caused by opening the window, and multi-layer filtration and purification can ensure the air quality entering the room and reduce the accumulation of indoor dust.

The above is the role of installing a fresh air system in schools.

The Gunai fresh air system has four layers of over-consideration European standard F7 level and high-efficiency over-consideration.

How the high-efficiency air filtration system SHF (System Hepa Filter) works:

The high-efficiency air filtration system is a laboratory air filtration and purification system that originates from the United States Nuclear Research Laboratory to prevent radiation from scientists.

1.The pre-filter layer is treated with an antimicrobial substance to filter out larger particle contaminants.

2.The negative ion filter layer neutralizes the positively charged smoke, dust, mildew and other suspended particles in the air, so that the precipitation is captured by the filter.

3. HEPA high-efficiency ultra-static filter layer has high filtration efficiency, which can filter out pollutants, dust and smoke above microns, and the antibacterial coating can inhibit bacteria and viruses.

4. The specially treated activated carbon filter layer can effectively filter harmful gases in the air, such as automobile exhaust, industrial pollutant gas, formaldehyde, benzene, sulfur dioxide, nitrogen dioxide and air odor.

HF purification technology features:

High dust removal efficiency: four layers of filtration to prevent dust from slipping in. HEPA can capture micron fine dust, completely eliminate indoor floating dust and dust pollution, and ensure that the room is spotless!

A micron is equivalent to 1/10,000th of a millimeter, which is much smaller than that of ordinary bacteria (generally about a micron in size);

High-efficiency sterilization: After the US Centers for Disease Control (CDC) testing and certification, HEPA has achieved a sterilization rate for the air!

Restore fresh air: The introduced indoor air, after high-efficiency filtration, can comprehensively filter out bacteria, viruses, dust, harmful gases, odors and other harmful media, so that the indoor air is fresh, clean and oxygen-rich.

Our unit does LANSHE fresh air, Panasonic fresh air, Brown fresh air and so on, but the filtration level of each manufacturer is different.

You yourself are making the Gu Nai fresh air system, you don't know, just ask your own manufacturer.

PS: What would you say? And not the opinion of your own fresh air brand? Ha ha.

Hello, there are many types of fresh air systems, and the installation of filtration levels for household fresh air systems can be divided into three types: primary filtration, medium filtration, and high-efficiency filtration.

Among them, high-efficiency filtration is what we usually call filtration. It has two main filtering methods:

Method 1, HEPA mesh filtration, which is generally divided into three layers of filters, the first layer is the primary effect, which can filter mosquitoes, hair, large particles of dust and other substances; The second layer is HEPA mesh filtration, which can filter micro-particles such as particles; The third layer is activated carbon filtration, which mainly filters various odors in the air.

The second method is high-voltage electrostatic filtration, the advantage of this filtration method is that it will not incur the cost of replacing consumables in the later stage.