In 14 years the haze just appeared when the media publicity are focused on the number of particles, purifier manufacturers are all proposed to intercept the haze with filters. At that time I raised the question about the bacteria and viruses carried by the haze is the most critical, but at that time no one paid attention to, consumers buy purifiers only ask can filter particulate matter, can remove the haze.
That said, I began to contact the purifier at the end of 13, really began to do sales is 15 years, there is not too much information, most of the time is self-study, nothing else, is to use a variety of theoretical learning, comparison, analysis of the real feeling of use.
Compared to professional R & D personnel, many may still be very amateur, welcome correction
Picture taken in 2014 in Wukesong Zhuozhan shopping center a variety of imported big brand "filter purifier"
This is the post I made in the forum in 15 years, wrote something about the current air purification Seeing this time began to sell a variety of purifiers wildly. Participate in the purifier industry conference when we talked about, do purifiers of many manufacturers, used to do clothing, selling jeans, and is the mold factory, do plastic products, in order to catch up with the purifier of this wind are doing purifiers.
Now most families have no choice but to buy a purifier, and some even buy several purifiers in one home. About the purifier consumer understanding is the filter, about the understanding of the air, is the number of particles, that only haze when you need a purifier, the air to be purified is to rely on filters to filter clean, this is the majority of people on the "air purification" understanding. And many people forget that air quality is good or bad, there are several factors:
1. toxic and harmful gases (including TVOC, formaldehyde, benzene)
2. bacteria and viruses
3. particulate matter
And when we are faced with an air problem, how to solve the face of the purifier, we get the answer is uncertain:
This is a good example of how to solve the problem of air quality is good or bad, and how to solve the problem of air quality is good or bad, and how to solve the problem of air quality is good or bad. For example, on the "can go formaldehyde air purifier" I Baidu this question, search out the answer to most of the answers say that the purifier can not go formaldehyde, are fooled, there are also quite fairy tale answer, let the plants to formaldehyde. The plant community said the pressure is very good, people are just a plant even the soul is not, can be quiet to do a plant well?
Now on the market are basically several products:
1. HRPA filter?
Particles will be adsorbed and filtered on the filter, this principle do not have to look at the big brands, how much money, it is a principle, fan + filter, a good multi-layer. The so-called new technology of the filter, high-tech filter, but he is a filter, or net!
This purifier has many problems, if it is for particulate matter, then well, even if the volume is not small to do, more than a meter high, a good big pile, but he has to rely on the fan cycle, dealing with the whole room, in fact, the processing capacity is not enough to deal with how much. Noisy, power consumption is not small.
We know that the haze particles are harmful, the filter utilizes limited power to adsorb a portion of the online, but! But! Is this the end? Put all the dust particles, all kinds of haze virus that everyone panicked, it is stored in the filter, he did not disappear, there is no chemical change, the haze is still that haze, and then more interestingly, in a very comfortable and warm room, humidity is also appropriate, the filter on a large number of dust particles will be how. Imagine for yourself. What happens to the rate of bacteria reproduction, so many people say that the filter machine smells when you turn it on, and that's the problem.
Manufacturers of purifiers or companies or not, and did not find a real way to purify, came up with such a way, "filtering"
Don't know if you remember the SARS, hospitals, dust-free wards, doctors wearing suits, gas masks, how it. What can be stopped, what can be changed?
General purifier detection haze is to the number of particles, but did not think, the number of particles reduced, not in the air, but in the filter particles contain harmful substances, bacteria, viruses, microorganisms, no one wants to go over the detection of the value of the particles, we care about is the number of particles.
Then we are concerned about formaldehyde, TVOC, harmful gases, odor these problems, more than the scope of the filter.
I think the filter purifier special big talk how to have the nerve to say that they go formaldehyde. You give me to filter a virus to see
Simply put, if the filter type if not regularly replace the cartridge it will be filtered pollutants once again blowing back to the room. And it's hard to know when to change the cartridge.
A friend of mine bought a Honeywell purifier, his home renovation, he said that after the new machine is turned on for a while after the room smell no more, turn off the machine, and then turn on, the smell is blown out again.
So, for the filtration technology, can only huh, you know, so that filtering dust machine can be called cleaner, can not be called purification. The word "purify" should be a verb to come, it should be active purification, not passive purification.
The second way: activated carbon.
Activated charcoal is also used for gas masks, many car purifiers and whatnot also use this, usually in the filter purifier with activated charcoal, said to go formaldehyde. Activated carbon is a lot of small holes, when the formaldehyde harmful gases flying in can be adsorbed, but the problem comes again, once the adsorption is full, the small holes are occupied, can not be adsorbed again, if not replaced in time, at the right temperature and humidity, activated carbon is a highly toxic carrier. （
This is also a passive purification method, which is waiting for formaldehyde to come to my bowl. Can't fit even if, I can't care, that's it
The third: photocatalyst also called light hydrogen ion
There are a lot of purifiers, but also publicity is added to the ultraviolet sterilization.
Baidu photocatalyst: photocatalyst is a nanoscale titanium dioxide as a representative of the photocatalytic function of the light semiconductor material of the general term, it is coated on the surface of the substrate, in the role of ultraviolet light, resulting in a strong catalytic degradation function: can effectively degrade the toxic and harmful gases in the air; can effectively kill a variety of bacteria and bacteria or fungi released toxins decomposition and harmless treatment; at the same time It also has the functions of deodorization, anti-dirt and air purification.
------------------------------
Photocatalyst has the effect of removing formaldehyde, but he also belongs to the passive treatment, photocatalyst needs to be sprayed on the coating, and then wait for formaldehyde to fall on the coating, the reaction occurs, but. As long as a grain of dust or something else, formaldehyde molecules can not come into contact with the photocatalyst coating. Beijing this weather, a small wind..... Not enough formaldehyde you chase it.
Image, photocatalyst purification, is a two-dimensional level of purification, just in a plane, not the whole space processing.
In addition, the ultraviolet here played a role in stimulating the photocatalyst reaction, but we do not know, this is the loss of watermelon to pick up sesame seeds, high-energy ultraviolet light source itself produces basal oxygen atoms Decomposition of formaldehyde than photocatalysts do not know how many times stronger.
So why do you say that the new machine to buy a little effect, because the passive processing, once adsorption full, fall on the dust, it is useless. The effect is weak.
(Another point that must be noted, because the photocatalyst with ultraviolet, the manufacturer will say that it contains ultraviolet sterilization disinfection of purification, which should be careful, because the ultraviolet here is only designed to stimulate the photocatalyst, in the structure of the space are limited to the ultraviolet, can not play a bactericidal effect.)
Photocatalytic technology uses 254 nanometer wavelength medical UV lamps to stimulate the photocatalytic hydrogen-oxygen machine to produce de-formaldehyde,? Is a two-dimensional concept of purification, and the use of ultraviolet lamps is also ordinary production process of medical ultraviolet, and in the design is limited to the photocatalyst filter layer of the barrier, so the role of ultraviolet lamps in addition to excitation of photocatalysts, and there is not much of a sterilizing effect.
Now most of the photocatalyst purifier, generally also combined with activated carbon, filtration technology, but are not the most fundamental solution
? The fourth: electrostatic dust
Electrostatic air purifiers to high-voltage electrostatic field adsorption of fine dust at the same time also the nitrogen in the air ionization of nitrogen oxides and substances.
This kind of equipment is used to fight fire, quite dangerous, especially in the humid environment of the South. There are many limitations, such as not being able to use it in a car.
The traditional ozone generator is also the same principle, the use of high-voltage discharge, producing ozone sterilization. Special attention is paid to this kind of ozone, is ionized nitrogen in the air, will produce nitrogen oxides, is carcinogenic. (I will talk about later, light plasma purifier also has ozone, but we call it "active oxygen", smell the smell of ozone, but the latter is different, the use of ultraviolet short-wave generation of pure ozone, his composition and efficacy are completely different. (Light way to produce ozone, without any carcinogenic substances, low power consumption, produced in a very soft way)
High-pressure discharge air purifier also has this secondary pollution problem. But now the market publicity only to his role in greatly enlarged, avoiding its secondary pollution.
Non-consumable purifiers will also combine photocatalysts, filters activated carbon, negative ions, plus dust collectors, a variety of filtration and adsorption principles all together ? In fact, the effect is short-lived, not a fundamental problem
Taobao search "no consumables purifier" generally come out of this electrostatic dust collector purifier, or negative ions
See Taobao quite a lot of these purifiers sell price tag six or seven thousand, that is, without consumables.
In fact, electrostatic dust removal applies to industry, and is not suitable for civilian use.
Baidu: a method of gas dust removal. Dusty gas through the high-voltage electrostatic field is electrically separated, dust particles and negative ions combined with negatively charged, tend to the anode surface discharge and deposition. In metallurgy, chemistry and other industries used to purify the gas or recovery of useful dust particles. The use of electrostatic field to make the gas ionization so that the dust particles charged adsorption to the electrode dust collection method. In the strong electric field air molecules are ionized into positive ions and electrons, the electrons run to the positive pole in the process of encountering dust particles, so that the dust particles are negatively charged adsorption to the positive electrode is collected. Of course, in recent years, through technological innovation, there is also the use of negative electrode plate dust collection. In the past, it was often used in coal-fueled factories and power stations to collect coal ash and dust in the flue gas. In metallurgy, it is used to collect oxides of tin, zinc, lead, and aluminum, etc. Now there are also dust sterilization products that can be used in homes.
Now mentioned plasma technology, low-temperature plasma technology and electrostatic precipitator are the same thing, are high-voltage discharge
Fifth: on the ozone:
We are now purifiers or ozone equipment mentioned by the ozone:
(1840 German C.F. Scheibain electrolysis of dilute sulfuric acid) (In 1840, C.F. Scheibain of Germany found a special odor gas released during the electrolysis of dilute sulfuric acid, so he named it ozone. 1785, the Germans found that a peculiar odor was produced when the motor was discharged when using the motor. 1840, the French scientist Christian Frédérique identified it as ozone.) The ozone named at the time of human discovery of ozone was the ozone produced by high-voltage electrical discharges. This type of ozone ionizes the nitrogen in the air and produces carcinogenic nitrogen oxides, so we say that the ozone produced by conventional ozone generator devices is harmful.
This kind of ozone has no basal oxygen atoms and hydroxide machine in its composition, only sterilization and disinfection, not much effect on formaldehyde.
The other kind of ozone is the ozone we say in nature, the ozone produced by ultraviolet irradiation, and we human beings can survive because of the protection of the ozone layer. In the air is very good in the forest seaside, the ozone content is higher, the air is fresh.
The photo-plasma purification technology imitates nature's purification principle, utilizing ultraviolet light to produce ozone.
So, please note: "Ozone" and "active oxygen" are two different concepts. The former is produced by high-voltage discharges, and the latter mimics the natural environment, with UV-generated ozone.
Sixth: Negative Ion Technology
Negative ion concentration in the air is one of the signs of good or bad air quality, the World Health Organization on the fresh air negative ion standard concentration has also carried out relevant provisions. China has also incorporated negative ions into its meteorological monitoring system, which is widely used in areas such as air environment protection.
We can usually feel the air extremely fresh next to waterfalls, in forests, and after thunder and lightning rains, which is due to the fact that there are a lot of negative ions in the air. Crystalline gypsum lamps can emit natural negative ions this feature, in the state of heat and closed room, especially full, can effectively balance the air content of positive and negative ions.
Negative ions are known as "air vitamins", its role includes: dust, in addition to floating hair, in addition to odor, in addition to smoke, sterilization, purification of air, treatment of pollen, dust, pet hair, spores allergies, improve asthma and other respiratory illnesses, to improve emotional fluctuations, depression, chronic fatigue, relieve mental stress, and so on. The list goes on and on. In short, it's great for people's health, mood, and energy.
Through artificial negative ion generation technology to produce ecological level of small particle size air negative ions, simulating the natural world of lightning high voltage ionization of the air to produce negative electrons, to the air in the oxygen, carbon dioxide, etc. as a carrier spread.
Our optical plasma purifier also has added negative ions this piece. He can be used as a kind of auxiliary fresh dust removal effect, but many purifiers, only rely on negative ion purification effect and ability is not enough.
Seventh: ultraviolet technology
Ultraviolet sterilization is the use of appropriate wavelengths of ultraviolet light can destroy the microbial organism cell DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) molecular structure, resulting in the growth of the cell death and/or regenerative cell death, to achieve the effect of sterilization. Ultraviolet disinfection technology is based on modern epidemiology, medicine and photodynamics, the use of specially designed high-efficiency, high-intensity and long-life UVC-band ultraviolet irradiation of flowing water, the water will be a variety of bacteria, viruses, parasites, algae, and other pathogens directly killed.
--------------------------------------
Now there are some air disinfectors on the market, or UV lamp sterilization devices, hospitals are more commonly used UV lamp sterilization disinfection is usually understood. This is very different from the "light plasma technology".
Most of the UV lamps used in hospitals use the 254 wave band. Boronized glass material, the cost is relatively low, the ultraviolet transmittance is very low. The service life is generally in a few hundred hours, and the ultraviolet attenuation is also fast.
Many purifiers add UV lamps to increase the selling point.
But the difficulty of applying UV technology is very high, and there are few mature technology applications at home and even internationally.
Many purifiers with UV lamps are very cheap, and the design of the structure can not play the effect of UV.
The traditional UV technology is usually sterilized by direct irradiation, and the next to say "light plasma technology" is also UV technology, but the difference is very big.
Eighth purification technology: light plasma technology:
The reason why it is called light plasma technology, not called ultraviolet purifier, is because of the use of the principle of light to purify, rather than through direct irradiation to kill the purification. It is by the combination of different wavelengths of ultraviolet light produced by the plasma dispersed into the air to actively decompose the principle of harmful gases. So the technical difficulty is relatively large, which is a complex optical design.
Ultraviolet technology used in air purification products, only a few companies in the world have this technology. Because of its technical difficulties and complex design structure and the high requirements of the internal accessories, so the cost is also dozens of times higher than ordinary purifiers.
The ultraviolet core components of the optical plasma are very high in energy level and different from ordinary ultraviolet lamps, so the purifier has a metal stainless steel shield inside, and the inner part of the casing is also plated and coated. Don't worry about UV leakage and radiation. What you see from the wind mouth is only the reflected light from the metal shield.
Ultraviolet technology is an ancient technology, but also a new technology, at the same time it is also a double-edged sword, to use it well need to be able to harness its cutting-edge technology. It is also not very easy to solve many technical difficulties.
------------------------------------------------ the scientific explanation of light plasma
Photo plasma purification technology (PurifyingPhoto Plasma) is the use of advanced photochemical reaction technology to form a high-level oxidative degradation of the technology, optical Plasma has the following several kinds of several kinds of energy composition: dual-wavelength (UVC, UVD) ultraviolet light + (photoelectric activation) → pure ozone (O3) + atomic oxygen (O) + basal oxygen (O*), through the two wavelengths of the special ultraviolet light source that can produce a series of strong sterilization of light, electrical plasma clusters, collectively referred to as the light plasma.
All organic pollution (bacteria and viruses, formaldehyde, ammonia, benzene, TVOC, etc.) of the main elements are H, C (carbon and hydrogen), the molecular structure is relatively solid, the basic principle of purification and degradation of light plasma is: in a specific wavelength (UV C) and a specific intensity of ultraviolet radiation light irradiation of the organics (hydrocarbons) to occur in the process of photosensitization, i.e., the molecules of the organic compounds to absorb the particular wavelength photon energy, the molecular chain is torn, decomposed into ions, free atoms, excited molecules or neutral molecules; at the same time, in a specific wavelength (UV D) and a specific intensity of ultraviolet radiation light irradiation, the oxygen molecules in the air (O2) absorbs the photon energy will be turned into ozone (O3) and atomic oxygen (O), the basal state of oxygen (O*); the chemical nature of these elements is very reactive, with a very strong Oxidation, is a strong oxidant, can oxidize all the photosensitive decomposition of organic matter, into water vapor (H2O) and carbon dioxide (CO2) and other volatile harmless gases, to achieve the purpose of complete removal of pollutants. Compared with other traditional purification means, this purification result is clean, thorough, no residue, and will not bring secondary pollution.
In summary, the real air purifier, to solve the problem of air, not only to intercept the filter particles, while taking into account the bacteria microbes, toxic and harmful gases should be able to deal with the real air purification, now the domestic market of purifiers mixed, the consumer is misled by the media, by the merchants fooled, there is no experts and scholars come out to tell the consumers the correct concept of air purification, how to choose the right product, has been the right product. Now the domestic purifier market is mixed, consumers are misled by the media, businessmen are fooled, no experts and scholars to tell consumers the correct concept of air purification, how to choose the right product, has been related to the health of everyone. In this answer, we will not advertise, we will not name any brand. At present, there are two brands in the world is light plasma technology (a Finnish brand, a domestic independent research and development brand, their own search), of course, to really solve the air problem, the best solution should be a set of air purification system, a variety of purification technology perfect combination, in order to achieve the most ideal use of the effect, just the people need is not to fool people "high-tech", but really have scientific research! "But the people need not to fool people "high-tech", but really have the spirit of scientific research enterprises, research and development of good products, support for national products, we must know that not necessarily all foreign technology advanced. Words to this