How air purifiers work

How air purifiers work

The air purifier is a new type of electrical appliance. It has a certain ability to remove solid pollutants and gaseous pollutants in indoor air. It has the function of removing harmful gases, smoke, filtering dust, eliminating odor and sterilization, releasing negative ions, etc. Features. home Air purifiers usually consist of a fan, an air filter, a negative ion generator, and the like. Common top 10 air purifiers 2018 on the market usually consist of a high-voltage generating circuit negative ion generator, a micro-fan, an air filter and the like. The working principle of air purifiers should be classified into three categories:

Air purifier working principle classification – passive purification class (filter purification class)

The main principles are:

The fan is used to pump air into the machine, and the air is filtered through the built-in filter to filter dust, odor, toxic gases and kill some bacteria. The filter is divided into dust collection filter, formaldehyde removal filter, deodorization filter, filter and so on. Among them, the filter is relatively high in cost, which can decompose toxic gases and sterilize, especially to suppress secondary pollution. The characteristics of this type of product are that the function of the fan and the quality of the filter determine the purification effect. The placement of the machine and the layout of the interior affect the purification. The indoor purification effect is not balanced, and it is difficult to complete. The filter replacement cost is high.

Air purifier working principle classification – active purification class (no filter type)
According to the active sterilization principle of these products, it can be divided into silver ion technology, negative ion technology, low-temperature plasma technology, photocatalytic technology, and plasma ion group ion technology.

The first generation, silver ion purification technology. Simply put, the silver block is ionized and blown into the air to have the effect of sterilization. The disadvantages are high cost, low bacterial killing rate, and almost no killing property to the virus. Product representative: Early Panasonic air purifier.
The second generation, negative ion technology. The main principle is to use the electrostatic discharge to release negative ions, and to absorb dust in concentrated air to reduce dust. At the same time, negative ions also ionize into oxygen in the air, which has a certain killing effect on bacteria. The advantage of such products is the production cost of the products. Lower.

The third generation, low-temperature plasma technology. The main principle is that by applying a voltage to the discharge voltage of the gas, the gas is broken down, and various strong oxidizing low-temperature plasmas are generated, and the contacted pollutants are decomposed in a very short time. This technology is generally used for industrial waste gas treatment, and secondary pollution occurs after a chemical reaction. If it is applied to a domestic air purifier, it is necessary to do human body safety testing and corresponding secondary pollution treatment technology.

The fourth generation, photocatalyst technology. The photocatalyst is a technique that utilizes semiconductors to emit free radicals with strong oxidizing power under the illumination of light. The advantage of this technology is that the product cost is low. The disadvantage is that the free radical activity causes it to stay in the air for a short period of time, and the killing effect on viruses and bacteria is also limited.

The fifth-generation, the net ion group technology. Sharp 2000 global patent technology. It is a technology that directly ionizes water molecules in the air into H radicals and OH radicals and then wraps water molecules. OH, radicals kill viruses and bacteria more than ozone and stay in the air for longer than ozone. Plasmacluster ion technology allows OH radicals to be wrapped with a layer of water molecules to maintain their presence in the air. At the same time, bacteria and viruses can be used to kill bacteria and viruses more quickly. This technology is currently the internationally recognized medical space purification technology and is currently the only space purification technology capable of killing A(H1N1, H1N5 avian influenza with a SARS kill rate of over 99%.

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Analyze how the air purifier works

Analyze how the air purifier works

There are many kinds of air purifiers on the market, and the types of wall-mounted and ceiling-mounted are dazzling. In fact, no matter how the shape of the air purifier changes, the working principle is basically the same. Air purifiers are classified according to their working principles and can be roughly divided into three types: 1. Passive adsorption filtration; 2. Active purification; 3. Active + passive dual purification.

Passive adsorption

Passive adsorption filter air purification principle: Passive air purification is the use of a fan to pump air into the machine, through the built-in filter to filter the air, mainly to filter dust, odor, disinfection and so on. This type of filter-type household air purifier uses HEPA filter + activated carbon filter + photocatalyst (cold catalyst, multi-catalyst) + ultraviolet disinfection + electrostatic adsorption filter to process air.
Comments: Passive adsorption air purifier mainly relies on the filter and activated carbon to adsorb impurities and odor. Although the filter is improving continuously, passive air purification is still relatively traditional in terms of its working principle, and the degree of air purification is relatively limited.

Active purification

Active purifying air purifier principle: The active China best air purifier is free from the limitation of the fan and the filter. It is not passively waiting for the indoor air to be pumped into the purifier for filtration and purification, and then discharged through the fan, but it is effective. The active release of the purification and sterilization factor into the air, through the diffuse nature of the air, reaches the air purification without dead angle in all corners of the room.
Comments: The active sterilization principle of this air purifier can be divided into silver ion technology, negative ion technology, low-temperature plasma technology, photocatalytic technology, and plasma ion group ion technology. These technologies can effectively inhibit bacteria and sterilize while filtering impurities, so as to achieve indoor air cleanliness.

Active + passive dual purification

Active + passive dual purification air purification principle: dual purification technology is based on active purification, combined with filter filtration, an air purification method. This type of air purifier is capable of omnidirectional removal of dust, odor and toxic gases in the air.
Comments: The dual purification method is the most popular and the best for indoor air purification. Many well-known air purification brands on the market use dual purification technologies, such as Daile negative ion air purifier (filter + negative ion technology)

Chuangji Internet Group exclusively introduces the natural marine antibacterial preparation technology of Japan Daiwa Co., Ltd., and cooperates with the “Daile”, “source” and “net” series air purification products independently designed and developed by the group. It not only satisfies consumers’ needs for disinfection, sterilization, mites, mildew, and odor but also regulates air humidity and prevents infectious diseases such as flu and athlete’s foot. What are you waiting for, in order to protect the health of your family, come and start one!

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Experts remind that negative ion air purifier is the family of choice

Experts remind that negative ion air purifier is the family of choice

The popularity of mobile phones does provide children with the convenience of communication, but children are in the stage of brain development, long-term exposure to mobile phones, lack of learning and communication to the outside world, will affect brain development, and even the phenomenon of mental decline. Adhere to the negative ions of breathing air, which has a good effect on children’s mental development.
What if the child’s intelligence declines? Many manufacturers have promoted children’s intellectual development as a publicity stunt, and various nutritional products and medicines have entered the big counter. So far, no research has shown that these health care products are helpful for improving intelligence. Experts say that regular breathing of ecological grade air negative ions can promote the development of children’s intelligence.

Mechanism of action of air negative ions on improving children’s intelligence

1. Negative ions (negative oxygen ions) can increase the number of synapses in neurons, strengthen the strength of the joints, and expand the effective neural network. US National Aerospace personnel have observed that changing the potential difference between the inner and outer nerve cells can cause the proliferation of neuronal synapses. Negative ions (negative oxygen ions) can change the potential difference between cells inside and outside, increase the number of synapses, effectively expand the neural network, and improve the effect of children’s intelligence.

2. Negative ions (negative oxygen ions) can promote the conversion of DHA and protect the neural network from damage. In the absence of DHA synapses, it cannot be maintained, causing damage to the neural network. Negative ions (negative oxygen ions) accelerate this conversion by enhancing enzyme activity, thereby increasing DHA formation and protecting the integrity of the neural network.

3. Negative ions (negative oxygen ions) are neuron detergents

Dr. Marian of the University of California found that negative ions (negative oxygen ions) have the effect of scavenging neuronal impurity compounds.

4. Negative ions (negative oxygen ions) can regulate the pH of the brain. Dr. Caro Yu, a British medical scientist, found that the higher the alkaline pH of the brain, the higher the IQ of the person. La Yin et al. used a magnetic resonance spectrometer to measure the pH of 42 brains of boys aged 6-13. It was found that when the PH value increased from 6.99 to 7.99, the child’s intelligence would more than double, that is, the IQ would be 63 points. It rose by 138 points. (From the October 4th “Economic Information Daily”)

With the deepening of people’s understanding of negative ion therapy, researchers have developed a negative ion generator based on the principle of negative ion generation. However, due to the different levels of negative ion generation technology, negative ions of three sizes, large, medium and small, are generated. Large and medium-sized negative ions cannot penetrate the human body like small-size negative ions, which have a health-care effect on the human body.

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How to pick the air purifier, I have “three strokes”

How to pick the air purifier, I have “three strokes”


I heard that people can live for 7 days without eating, and can live for 3 days without drinking water. But if there is no air, I am afraid I will not be able to live for 3 minutes.

In modern society, with the advancement of science and technology and the development of industrialization, the air we breathe has also been affected and become “unclean”. Not only is the outdoor air polluted, but the indoor air is also “dirty” due to renovations. More and more people realize that our air needs to be purified.

Everyone can’t help but ask, how do you choose an air purifier so that we can breathe safely? Today, Xiaohang gives you “three strokes”:

The first trick: choose technology

The pollutants in the air mainly include particulate matter (such as PM2.5, bacteria, and viruses) and gaseous pollutants (including various odors, formaldehyde or toluene brought by decoration). We need to use different methods to destroy them one by one.

There are two common techniques for removing particulate contaminants:

Electrostatic precipitator

A high-voltage electrostatic field is used to ionize a gas, thereby causing dust particles to be electrically adsorbed to the electrode. The electrostatic precipitator has high purification efficiency and can collect fine dust of 0.01 micron or more. However, electrostatic dust removal does not affect all pollutants, and may also produce ozone, which is harmful to the human body.

HEPA high-efficiency filter

HEPA is an internationally recognized high-efficiency filter material through dense fiber physics to intercept particulate pollutants without secondary pollution. It has been widely used in high-cleaning places such as operating rooms, laboratories and aviation. However, HEPA filters have different grades. Household air purifiers generally use H10-H13 grades. We have to choose a high-grade filter to ensure the effect.

There are two common techniques for removing gaseous contaminants:

Nowadays, the common method for removing gaseous pollutants in the market is to decompose pollutants by adsorption with activated carbon and other materials to ensure that the pollutants will not be released again. There are two common materials:


Under the action of ultraviolet light, the catalytic pollutants produce a photocatalytic reaction, which can efficiently decompose pollutants. However, there must be a light source containing ultraviolet light in the process, and if no light is present, it is impossible to exert a cleansing effect. In other words, it is almost useless in a room with low light or at night.

Cold catalyst

It can catalyze a reaction under normal temperature conditions to decompose various harmful gases into harmless substances such as water and carbon dioxide. Therefore, the cold catalyst can also effectively filter the pollutants in the air in a dull environment and can be used anywhere in the home. Of course, to choose a formal enterprise with an authoritative certification, the quality is guaranteed.

Through technical comparison, we found that HEPA high-efficiency filter + activated carbon + cold catalyst can effectively filter particles and gaseous pollutants in the air. Moreover, this combination has a good purification effect, high-cost performance, and no secondary pollution.

The second measure: look at raw materials

Good technology also needs good materials to achieve.

HEPA filter

The enjoyable air purifier selects the highest level H13 filter in the H10-H13 level that is commonly used in domestic air purifiers. After IBR laboratory testing, it can effectively filter the particles of 0.008-micron particles to ensure the purification effect.

Activated carbon

Enjoy the excellent activated carbon air purifier with a surface area of ​​more than 1000 square meters per gram. As shown in the above figure, the activated carbon is magnified many times, and it can be seen that there are many pores for adsorbing pollutants. The pores of 1 gram of enjoyable activated carbon are expanded to an area of ​​more than 1000 square meters, which indicates that the enjoyable air purifier has high adsorption pollution capacity.

Cold catalyst

The Enjoy Air Purifier uses a highly activated cold catalyst that is evenly distributed on the surface of the activated carbon to accelerate the decomposition of contaminants into harmless substances. It can be used at night, and it can also breathe clean air during sleep.

The third measure: look at the standard

The selection of air purifiers also depends on whether they meet the national standards. In response to the chaos of air purifiers in recent years, the state implemented the “new national standard” in March 2016.

As the “new national standard” participating unit, Infinitus has been producing and verifying products in strict accordance with the “new national standard”, and the products have reached the requirements of “new national standard” and “three highs and one low”.

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Why do you say that there is no fog in summer, but you still have to open an air purifier?

Why do you say that there is no fog in summer, but you still have to open an air purifier?

As soon as summer arrived, the foggy days in Beijing were significantly less, especially during the “Belt and Road” summit. Many people turned off their own top-rated air purifiers and enjoyed the blue sky. However, what most people don’t know is that behind this kind of enjoyment, there is still hidden risk. There are still shocking air pollution under the blue sky, but the pollution does not exist outside, but exists indoors.

There is a fog in winter and TVOC in summer.

Today, everyone knows to guard against smog in the winter but ignores the “TVOC” in the summer. The so-called “TVOC” is the abbreviation of Total Volatile Organic Compounds, which refers to indoor organic gaseous substances, also known as total volatile organic compounds, including carbon monoxide, carbon dioxide, carbonic acid, metal carbides and other toxic and harmful gases in the air.

There are many sources of pollution indoors, and whether it is summer or winter, it is equally polluted, especially in summer.

The release of indoor pollution such as formaldehyde is greatly affected by temperature, and the indoor and outdoor temperatures are high in summer, so it is easy to cause indoor pollutant concentration to exceed the standard. For every 1 °C rise in room temperature, formaldehyde volatilized from wooden furniture and flooring will increase the concentration of formaldehyde in the air by 0.15 to 0.37 times. Therefore, the volatilization of paints such as benzene and ammonia is more serious in summer than in winter, and radioactive cesium is often contained in household tiles. This serious carcinogenic gas also spreads with increasing temperature.

In addition, there are more air conditioners in summer, indoor ventilation is not ventilated, and indoor pollutants remaining in the decoration gather. Many household air conditioners do not clean and cause secondary pollution. The bacteria and microorganisms are gradually deposited, and cold air with harmful substances is added. After the respiratory tract, not only will people feel dry mouth and mouth, there will be mild cold symptoms, and in severe cases, it will cause various respiratory diseases, which is what we often call “air conditioning disease.”

The World Health Organization has listed indoor air pollution as a top 10 threat to human health, including hypertension, hypercholesterolemia,

and obesity. The main culprit of respiratory diseases and intestinal infections and even leukemia, which are predisposed to infants and young children, are also closely related to indoor air pollution.

At present, indoor air pollution has not caused much attention in China, but I believe that with the further popularization of the media, the concept of TVOC in the future will be as popular as the smog.

How to effectively reduce indoor air pollution?

How to prevent indoor air pollution in the summer? Especially after the renovation, many families will adopt some soil methods other than formaldehyde in order to prevent the concentration of formaldehyde and radioactive cesium from being too high, but these remedies do not necessarily work.

1, window ventilation, only the standard is not cured

The most common method is to open the doors and windows for long periods of time. Many Chinese families generally open a new home window after the renovation and then stay in the air for several months to six months. But we all know that formaldehyde has certain volatility, and the rate of volatilization has a great relationship with the temperature and humidity of the environment. The higher the temperature, the higher the humidity, the greater the volatilization speed. Therefore, formaldehyde can be removed to some extent by ventilation, but this method can only relieve the effect.

However, formaldehyde exists in three states: free state, adsorbed state, and combined state. According to a report in the China Daily in 2016, only formaldehyde in the free state can be eliminated by ventilation, and it can be eliminated more than 4 times the normal wind speed. In addition, the concentration of formaldehyde in indoor air is related to many factors, such as indoor temperature, indoor relative humidity, indoor ventilation, etc., which will increase the intensity of formaldehyde emission under high temperature and high humidity conditions.

Studies at Yokohama National University in Japan have shown that the release period of indoor formaldehyde is generally 3-15 years, and it is impossible to remove indoor formaldehyde after ventilation after renovation. However, in later life, the radioactive cesium in formaldehyde and ceramic tiles in wooden furniture will continue to volatilize. This volatiles is not completely eliminated after ventilation but are accompanied by long-term residence.

2, bamboo charcoal bags, plants, fruit skins are floating clouds

Many people hope to absorb formaldehyde in bamboo charcoal bags, formaldehyde scavengers, vinegar, plants, and fruit peels. The Zheda Ice Pest Laboratory conducted special experiments on this. They selected bamboo charcoal bags, formaldehyde scavengers, vinegar, plants, and fruit peels, as well as rooms that were completed for 3 months as experimental rooms.

The data shows that the formaldehyde concentration in this 10 square meter room is 0.196mg/m3, which is nearly double the national standard of 0.1mg/m3. After 3 days, it was found that formaldehyde was removed by bamboo charcoal. The concentration of formaldehyde in the air was 0.190 mg/m3, the test data of vinegar was 0.198 mg/m3, the detection of fruit peel was 0.201 mg/m3, and the test data of formaldehyde scavenger and plant were 0.196. Mg/m3.

In other words, these five measures do not have much effect on eliminating decoration pollution. The core reason is that formaldehyde is continuously emitted, and passive absorption is very inefficient. The most typical is the plant, which has a very limited breathing capacity, usually in the microgram (one-millionth of a gram) level, which is almost negligible.

3. The logical paradox of environmentally friendly building materials not being environmentally friendly

In consideration of the ineffectiveness of these methods, some families have tried to adopt the “environmental building materials” promoted on the market. However, in fact, environmentally-friendly decorative materials only refer to the release of harmful substances within the state and do not mean that there is no formaldehyde release.

More contradictory is that the national GB18584-2001 “Limited Quantity of Hazardous Substances in Wood Furniture for Interior Decoration Materials” requires that the amount of formaldehyde released should be ≤1.5mg/L to meet the standard. Since the implementation of the standard for many years, after the development of the industry and the promotion of the merchants, many consumers have already known that the E1 standard is “≤1.5mg/L”, which has become the “minimum standard” for the emission limit of many finished products such as wooden doors. .

But the drawback of this standard is that if the furniture uses this material, the larger the volume, the more formaldehyde is released. Therefore, the more indoor furniture under the domestic environmental protection standards, the excessive release of formaldehyde content is likely to exceed the standard. That is to say, even if every piece of furniture and every building material is environmentally friendly, the amount used in a house may cause excessive pollution in the room. To achieve true health, you must have a higher standard than the standard.

Eliminate TVOC and trust professional equipment

After learning a series of “unreliable” methods of removing formaldehyde, everyone must have doubts. Is there really no good way to deal with formaldehyde? In fact, at present, it is relatively recognized internationally that a relatively effective means is to carry out formaldehyde adsorption in the environment through the high adsorption of activated carbon. Different from the large pore size design of bamboo charcoal material, the pore diameter inside the activated carbon is relatively small, and it can effectively filter and adsorb formaldehyde gas molecules and can achieve good results.

The activated carbon was industrially designed to enter the home scene, and an air purifier product with formaldehyde removal function came into being. However, some purifier filters cannot decompose formaldehyde to represent gaseous air pollutants. To effectively purify the pollution, it is necessary to use a purifier equipped with an activated carbon filter.

In fact, in developed countries in Europe and America, indoor air purifiers have become an essential electrical appliance at home, just like refrigerator color TV washing machines. Part of the reason why people in developed countries with relatively good environments still consume air purifiers is medical reasons. On the one hand, respiratory diseases such as asthma will cause some people to have higher air quality requirements, and on the other hand, they have special requirements for the quality of the air environment. Air purifiers play an important role in daily households in Europe and the United States. The root cause is that European and American residents have a relatively high awareness of indoor air pollution.

In fact, air purifiers are widely welcomed because air purifiers are based on passive adsorption of activated carbon, through scientific air duct design, more professional air quality sensors and more intuitive air quality display modes, enabling air purification. The device not only realizes high-efficiency formaldehyde adsorption purification but also helps users to intuitively understand the air quality of the current environment and make the air purification process truly “visible”.

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What is the working principle of the air purifier?

What is the working principle of the air purifier?

The air purifier is mainly composed of a motor, a fan, an air filter and the like. The working principle is that the motor and the fan in the machine circulate the indoor air.

The polluted air passes through the air filter in the machine to remove or adsorb various pollutants. Some models of air purifiers also install an negative ion generator at the air outlet (the high voltage in the negative ion generator generates DC negative during operation). High pressure), the air is continuously ionized, a large amount of negative ions are generated, and is sent by the micro fan to form a negative ion airflow, so as to clean and purify the air.

Main species

1. Passive adsorption filtration purification principle (filter purification)

The main principle of the passive air purifier is to use the fan to pump air into the machine and filter the air through the built-in filter, which can mainly filter dust, odor, toxic gas and kill some bacteria. The filter screen is mainly divided into: a particulate filter and an organic filter. The particulate filter is further divided into a coarse filter screen and a fine particle filter screen.
2, active purification principle (no filter type)

The fundamental difference between the principle of an active top rated air purifier and the principle of passive air purging is that the active air purifier is free of the limitations of the fan and the filter.

It is not passively waiting for the indoor air to be pumped into the purifier for filtration and purification. Instead, it effectively and actively releases the purification and sterilization factor into the air. Through the characteristics of air diffusion, it can reach the corners of the room to clean the air without dead angle.
3, double purification class (active purification + passive purification)

This type of purifier combines passive purification technology with active purification technology.

Extended information:
Purification effect
First compare it from air purification efficiency. In the air purifier of the passive adsorption purification mode, since most of the air purifiers are used in the mode of the fan + filter, the flow of the air using the air is inevitably dead.

Therefore, passive air purification can only produce a certain purification effect around the air purifier. It takes a long time to filter all the indoor air, which is difficult to produce an effect on the purification of the entire indoor environment.

Active air purification utilizes the diffuse nature of air to bring the purification factor to all corners for air purification. The air can diffuse to the place where it can be purified.

Comparing with the negative ion air purifier, it is found that after the negative ions are released from the air, the negative ions can actively attack, find the pollutants in the air, and agglomerate into a group, and actively settle them. From this point of view, active air purification has obvious advantages.
The negative ion air purifier is different, not only can effectively remove particulate pollutants in the air, decompose harmful gases such as formaldehyde, provide clean air to the indoor environment, and provide air negative ions that have an efficient effect on human health care in the indoor environment. Make indoor air quality the standard of “healthy air”.

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Why would I recommend a water purifier?

Why would I recommend a water purifier?

First, the water on the high floor is not clean
Due to insufficient water supply pressure in the municipal pipe network, only 5-6 floors of water supply can be achieved. That is to say, the water supply above the sixth floor can only use the secondary water supply and pressure equipment to achieve the purpose of water supply. The secondary water supply, the pollution is more serious, the impurities are too much, it is not clean, and it is not suitable for long-term drinking. If you have water purification equipment, the water quality will be clean no matter how high the floor is.

Second, the inconvenience brought by the water dispenser
Drinkers are used in general households, but there are three problems with drinking fountains:
1, the water dispenser should always change the water, trouble;
2, the water dispenser should be cleaned frequently, otherwise, it will easily breed bacteria;
3, the water dispenser must be kept energized all the year-round, power consumption.
If you have household water purification equipment, you can solve the above three problems well.

Third, the safety risks of tap water
If you have an electric kettle in your home, you will find that there are scales after burning a few times. Why? Tap water is too many impurities and is not clean.

If you wake up in the morning and brush your teeth with tap water, you will find that the tap water that you just opened will be a bit yellow or even pungent. Why? Tap water is too many impurities and is not clean.

If you are a tea lover, then the water you are sure to use is mineral water, purified water or filtered water. Why? Tap water is too many impurities and is not clean.

If you are a maintenance-conscious person, you must know that in addition to exercising more, focusing on sleep quality and nutrition, drinking water is also very important. You will definitely not drink tap water. Why? Tap water is too many impurities and not clean?

If there are elderly people and children in the family, it is not recommended to drink tap water for a long time, which is easy to cause stones and gastrointestinal diseases. Why? In addition to the poor stomach of the elderly and children, there is a lot of impurities in the tap water, not clean.

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There is an air purifier in the house, and there is no need to install a fresh air system?

There is an air purifier in the house, and there is no need to install a fresh air system?

It’s almost smog, and almost every day, a friend asks a question: Is there an air purifier at home, and is there a need to install a fresh air system?

Main functions of the fresh air system

Personal opinion: The most important role of the home fresh air system is to improve ventilation.

The original intention of the fresh air system was to improve the ventilation of large indoor spaces. To put it bluntly, as long as it is a device that can speed up indoor and outdoor air exchange, even if it is only an exhaust fan that can pump air inward or outward, it can be regarded as a kind of fresh air.

Later, people found that although the simple ventilation was supplemented with oxygen, the outdoor air was not so pure, so a purification device such as a HEPA filter or an electrostatic dust collector was added to the air inlet. Come, the air entering the room is relatively clean, and after running for a while, the indoor air can reach a relatively good level.

This is the common home fresh air system nowadays.
PS, fresh air has many functions (such as dehumidification, humidification, heat exchange) because it is only for the friends who are most concerned about the current function of the friends around, it is not launched one by one.

From this brief introduction, you can see the two most important functions of the fresh air system:
Ventilation and ventilation, discharge carbon dioxide from the room, and inject fresh air;
Filter dust from outside air and pollutants such as TVOC;

What is the purification capacity of the fresh air system?

Many people are recognized for the ventilation function of the fresh air system, but their purification ability is somewhat inaccurate.

On the market today, most qualified fresh air systems have a purification capacity consisting of two major aspects:

HEPA filter adsorption at the air inlet, or electrostatic dust collection. This is a good understanding, the air is purified before entering the room, and the principle of the air purifier is the same;
Micro-positive pressure; this principle is slightly rounded, but it is indeed the advantage of the new fan compared to the purifier. To put it simply, when the fresh air is pumping into the room, the indoor air pressure is slightly higher than the outdoor air. In this way, dirty air outside can not enter the room along the door and window.

Inflate the balloon as an example.

The pump is like a fan of the fresh air system, and the balloon is like our room. If the balloon is perfect and airtight, then the balloon will swell up quickly.

But all the rooms can’t be completely sealed. In fact, pm2.5 is also going into the room along with these eyes.

It’s like a leaking balloon. So what happens if you are pumping up a leaking balloon?

Is it possible to “squeak” out of the air in the place where the air leaks, so can the gas outside the balloon enter the balloon from these loopholes? Of course, it will not work. In this way, the indoor air is kept clean as much as possible.

Therefore, the conclusion is that qualified new wind turbines are also reliable.

Fresh air system PK air purifier

This is a question that everyone is very concerned about. It is a bit clear to say.

As an example of brain-destroyed mathematics that everyone has done in elementary school, you know the difference between the two.

The air in the room is like the dirty water in a swimming pool.

The way of the fresh air system is to reserve a good entrance and exit in the swimming pool while pouring tap water into the pool and releasing water (how many minutes can you change the water?)

The air purifier is different, only need to use a pump, pumping water from the pool, filtering and then returning to the pool (how many minutes can you filter the water?)

(Note my wording: the new wind is “changing” and the purifier is “filtering”)

This shows the difference between the two:

The installation of the fresh air system is larger. In addition to the installation equipment, the air inlet and outlet are reserved, and the pipeline type also needs to be buried.
At the same time, the efficiency of purification is relatively low, and the cost (including the replacement of the filter element, electricity bill, etc.) is also larger. The advantage is that because there is always fresh air injection, you will not feel “squeaky” because of lack of oxygen, and once the original dirty air is discharged, the room is easier to maintain a cleaner state;

The best and cheap and best air purifier is more efficient in clean air and relatively inexpensive. The only downside is that because it has been circulating in the room all the time, it is easy to lack oxygen and it is easy to feel “boring”.

After all, the air purifier can quickly remove the smog and reach the most basic air quality, but it can’t do anything about the problem of low oxygen and high CO2. For the foggy area, the purification ability of the fresh air system does not account for the advantage, the pain point that it really wants to solve is the ventilation problem in the smog period.

Therefore, my personal point of view is that just to remove the shackles, close the doors and windows, and pick up a good air purifier; but considering the quality of life, prepare for long-term trenches, especially if you have children, match the new wind. The system is the best!

Filter life problem
Maintenance costs may be the biggest headache for the fresh air system.

Because the fresh air is pumped from the outside, it is equivalent to working in a hazy environment, which makes the filter consumption very fast. In addition, due to the limitation of space volume, the fresh air is often thinner.

I have calculated that in the heavy haze days, many imported new fan filters (foreigners do not consider my national conditions at all), often need to be replaced once every 3 to 5 days, otherwise the purification efficiency will plummet.

However, smart engineers have developed internal circulation functions on new wind turbines. To put it simply, in the case where the indoor CO2 concentration is not high, the air is not exhausted from the outside but is changed from the indoor air, which actually becomes an air purifier.

If there is a new wind, you don’t have to worry about decoration pollution.

This is actually a digression. I have seen the previous articles of the Loofah dad know that the personal pollution of the decoration is relatively conservative. After all, this is a toxic and non-toxic category, and it is sloppy.

In theory, if the air volume of the fresh air system is large enough, it is very fast to discharge the formaldehyde and other pollutants accumulated indoors.

At present, personal observations of many users’ measured results do not seem to be so ideal. A detailed analysis, there are two reasons:

1, the air volume is not big enough; not enough to quickly dilute the concentration of indoor pollution gas; because under normal circumstances, the family generally does not let the new fan work at the maximum file;

2. The fresh air system itself is also likely to have its own source of pollution (a few products with poor workmanship). Because the glass and the pipe will be glued when the fresh air is installed, and the fixed HEPA filter and the frame are also useful for the glue. Therefore, if the materials used in these places are not good, they will be self-contained.

Therefore, even if a new wind is installed, it cannot be relied on, and it still takes a long time to monitor.

Summary two sentences

Finally, briefly summarize two sentences:
1. The new wind is reliable, and its greater role is to solve the problem of ventilation and improve the quality of life; this must be clear;

2, the best combination of the home is still a fresh air + air purifier, the two have their own advantages, complement each other; there is space to install, and the family with this budget, it is worth loading.

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How does the air purifier purify the air? Be alert to secondary pollution when using

How does the air purifier purify the air? Be alert to secondary pollution when using

When the smog weather occurs, the air purifier becomes the new favorite of the family. Air purifiers can adsorb, decompose or convert various air pollutants, including PM2.5, dust, pollen and more.

How does a cheap and best air purifier remove particulate matter from the air? There are currently three main methods: mechanical filter type, electrostatic electret filter type and high voltage electrostatic dust collection.

The mechanical filter is a physical interception, which uses a filter to filter out particles in the air. In order to improve the purification efficiency, the filter structure needs to be very dense, and the impact force of the airflow on the filter screen is relatively large, so the filter has a short life.

The electrostatic electret filter is a dielectric material made of a polypropylene film, which can store space charges for a long time and utilize the electrostatic force of the charge to trap dust particles. The air is filtered by the electrostatic electret material, and the dust removal wind resistance is low, and the high capturing efficiency can be achieved with low energy consumption.

High-voltage electrostatic dust collection uses a high-voltage electrostatic field to ionize the gas so that the dust particles in the air are electrically adsorbed to the electrodes. This method of dust collection has a small wind resistance and a high efficiency for collecting dust from smaller particles. However, the effect of capturing larger particles and fibers is poor, and it is easy to discharge. The cleaning takes time and effort, and ozone is easily generated to form secondary pollution.

In addition to the above three-particle removal technologies, newer air purifiers currently have negative ion and plasma methods. The two methods of removing dust particles are similar to high-voltage electrostatic dust collection. All of the particles in the air are charged and coalesced to form larger particles. However, the particles are not actually removed, but they are attached to the surface, which is likely to cause dust to rise again.

General household air purifiers are mainly filtered type and electrostatic type. The main difference between the two is that the filter type is equipped with a HEPA (High-Efficiency Air Filter) filter that needs to be replaced, but the electrostatic type does not. The electrostatic air purifier needs to clean the electrostatic dust collecting parts frequently. The filter air purifier is the most common type of product on the market, and its magic weapon is safe and efficient.

The most harmful to the human body in the air is dust less than 2.5 microns because it penetrates cells and enters the bloodstream. Electrostatic air purifiers filter dust, smoke, and bacteria that are smaller than cells. Using a high-voltage electrostatic field of about 6000 volts, it can instantly kill bacteria and viruses attached to dust and prevent diseases such as colds and infectious diseases.

The core of the filter air purifier is the filter, and each purifier has several layers of different functional filters. The filter is dirty and the water cannot be washed and must be replaced. When the filter material is saturated, it becomes a “source of pollution” and secondary pollution occurs. Therefore, even in the case of good air quality, the filter can not be used for more than half a year.

Some merchants claim that air purifiers can remove formaldehyde. Is this true? The evaluation results of the National Indoor Interior-Environment and Environmental Product Quality Supervision and Inspection Center show that the existing air purifiers are basically ineffective. As a consumer, you must have a pair of eye-catching eyes, don’t be fooled by the publicity of the business.

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Quickly remove formaldehyde and live in a new home, use ventilation + air purifier

Quickly remove formaldehyde and live in a new home, use ventilation + air purifier

The indoor environmental pollution is mainly caused by the presence of various volatile organic compounds in the indoor air, such as decoration materials, furniture, incomplete combustion of fuels, and chemical agents, which cause air pollutants to accumulate in confined spaces for a long time and cause pollution to the indoor environment.

In family life, decoration pollution mainly exists in the form of gas. The more common pollutants are formaldehyde, benzene, ammonia, TVOC, and other pollutants.
Formaldehyde is mainly found in various types of non-environmental plates, paints, paints, and decorations. Formaldehyde is harmful to human health and may cause cancer in severe cases. Benzene, ammonia, and TVOC scavengers are mainly found in paints, paints, and wallpapers. The easy diffusion of benzene in the air can cause damage to the human hematopoietic system and affect pregnant women and fetuses.

The resistance of different people to pollutants is not the same, so how long it takes to stay can not be generalized.

Generally speaking, ordinary adults can stay in the air for 3 months after the renovation is completed. However, if you still can smell the irritating smell when you check-in, you need to consider delaying the stay. It is best to ask the professional organization for indoor pollution detection. Secondly, the later the check-in time, the better. If it is necessary, it must be more than half a year and use various measures to remove pollution at home.

Therefore, many new homeowners will use various methods to remove formaldehyde after renovation. Although they cannot be completely controlled, we can reduce indoor pollution to a minimum by some means.

In order to be able to quickly and safely enter the new home, the following several methods for removing formaldehyde are recommended.

The preferred choice for household formaldehyde removal is to maintain good ventilation. This is mainly due to the low cost of ventilation and easy operation. The circulation of indoor air can accelerate the drying of paints and the like, thereby releasing harmful gases and discharging them outside through air circulation.

However, everyone has overlooked one point: What is the effect of ventilation? In fact, the effect of window ventilation depends mainly on various external factors such as weather, range, and type of house. If there are rain and rain, we can’t open the window, and the ventilation will not be able to play a role. In addition, for example, the reason for the type of house, the house is in a leeward place, or the windows in the home are rarely conducive to ventilation (many families are dark guards). Therefore, if you want to rely solely on ventilation to remove formaldehyde, it is best to dispel this idea as soon as possible and cooperate with other methods of removing formaldehyde.

air purifier
The use of technology as much as possible, in addition to ventilation, if the economic situation allows, you can consider the use of air purifiers, even the installation of fresh air systems will receive better results.

Air purifiers are a new type of household appliances that have entered Chinese homes in recent years, mainly to clean indoor air. The core technology of air purifiers is physical filtration. The fan inside the purifier “pushes” the indoor air into the machine and isolates the contaminants through the filter. The filter has a certain pore size and different sizes of pores, which can isolate particles of different diameters.

The decoration pollution is a gaseous pollutant, the diameter is much smaller than the particle pollutant, less than PM2.5, and can not be isolated by the filter. Therefore, most air purifiers can only remove particulate contaminants, and they are also helpless with gaseous pollutants such as formaldehyde and benzene. Therefore, in addition to formaldehyde must choose a formaldehyde air purifier.
In addition to formaldehyde air purifiers must have two points: First, the filter layer can absorb + decompose formaldehyde, which not only can firmly lock the formaldehyde but also prevent secondary pollution from escaping. Second, it is necessary to accurately display the value of formaldehyde, so that it can detect the change of formaldehyde value in the whole house. It is clear at a glance, and people are very relieved!

Activated carbon
Activated carbon is a self-porating adsorbent that absorbs formaldehyde from the air and stores it in its own pores. Because most activated carbons have better absorption capacity, but only by absorption to control pollution, it will not be long before it reaches saturation. At this time, the activated carbon can not only play the role of removing formaldehyde but also become a source of pollution to release the absorbed formaldehyde. Therefore, when it is generally used for about 3 months, it is recommended to throw away the old activated carbon, replace it with new charcoal, or choose a new type of activated carbon such as coconut coke, which will last for a long time.

Nano live ore
Nano-live ore is imported from the active volcanic ore, sepiolite, and other pure natural ore and non-metallic rare earth ore, through deep purification and scientific ratio, through the original process to improve the finely produced particles. All of them are international mainstream natural environmentally friendly raw materials, with extremely developed Emi and nano-scale pores (1 angstrom = 10 nm), and the micropore diameter is concentrated at 0.23-0.91 nm, which is 5000 times that of the same-body activated carbon. Toxic and harmful gases such as formaldehyde, benzene, ammonia, hydrogen sulfide, sulfur dioxide, TVOC, etc.

Nano live ore has the advantages of decomposability, long life, and no secondary pollution.

Increase air humidity
The increase in indoor air humidity can condense many small water droplets in the indoor air, and the formaldehyde floating in the air is absorbed by these small water droplets. However, since the water droplets gradually evaporate over time, the absorbed formaldehyde is released again, and thus it can be seen that this method cannot be applied to long-term removal of formaldehyde.

The above four methods are the most mainstream and most effective methods for removing formaldehyde. Many households choose formaldehyde and top 5 large air purifiers in addition to formaldehyde. In the weather that is not conducive to window ventilation, the best room air purifier is turned on in addition to formaldehyde. , Convenient and practical.

Summary of invalid methods:
Although the plant can absorb a small amount of formaldehyde, the absorption is very small, which is a drop in the bucket for decoration pollution. The peel can’t remove formaldehyde, can’t absorb formaldehyde, and can only cover the decoration taste with aroma. The vinegar is similar to the peel and does not react with formaldehyde. It only uses a pungent odor to cover up the taste of the decoration. Governance methods must be scientifically chosen, and must not be used to save money and listen to rumors, and delay the timing of governance to endanger health.

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