The multi-function air purifier is developed on the basis of the traditional purifier. In addition to detecting and filtering PM2.5 in the air (particles with a diameter of less than 2.5 microns in the air); it can also detect odors and volatile organic compounds in the air (VOC) such as formaldehyde, toluene, etc. and carry out filtration and purification; at the same time, it also has antibacterial and sterilizing effects;
By emitting high concentrations of negative ions, our office and home can have forest-like air. Because it integrates multi-functions, it has surpassed the traditional purification function and is the development direction of a new generation of air purifiers, so it is called multi-functional air purification Device.
At present, the ideal effect is a filter-type multi-function air purifier. The implementation principle is relatively simple. The air is drawn into the machine through the fan, and the built-in filters of different functions can filter PM2.5 and volatile organic compounds (VOC) Harmful gases such as formaldehyde and toluene kill bacteria in the air, and emit high-concentration negative ions together to output purified air.
1. Filter PM2.5
Mainly filter PM2.5 through HEPA, HEPA (High-efficiency particulate air Filter), which means high-efficiency air filter in Chinese. The HEPA filter consists of a stack of continuous sub-glass fiber membranes folded back and forth, forming a wavy gasket for placement and Supports the filtration boundary. It has a strong ability to capture particles, a small pore size, a large adsorption capacity, high purification efficiency, and has water absorption. The purification rate for particles of 0.3 microns is 99.97%. In other words, only 3 of every 10,000 particles can penetrate the HEPA filter membrane. HEPA is an internationally recognized best high-efficiency filter material. Initially, HEPA was used in nuclear energy research and protection and was widely used in precision laboratories, pharmaceutical production, atomic research and surgical operations where high cleanliness is required.
2. Deodorization and VOC
1) Cold catalyst filtration
The cold catalyst is a new type of air purification material that can catalyze reactions under normal temperature conditions. At normal temperature and pressure, it can decompose a variety of harmful odorant gases into harmless and odorless substances. It changes from simple physical adsorption to chemical adsorption. While decomposing, remove harmful gases such as formaldehyde, benzene, xylene, toluene, TVOC and generate water and carbon dioxide. During the catalytic reaction, the cold catalyst itself does not directly participate in the reaction. After the reaction, the cold catalyst does not change and is not lost. It plays a long-term role...
2) Activated carbon filtration
Activated carbon has better aerodynamic properties, small volume density, large surface area, high adsorption efficiency, low wind resistance, and long life. Its principle is to rely on the well-developed pore structure and surface area of carbon, and it can contact the surrounding air to a large extent. Passive adsorption of pollutants into their pores, so the larger the surface of activated carbon and the more developed the pore structure, the stronger the adsorption capacity. Theoretical studies have shown that the larger the molecular weight of harmful substances, the easier it is to be adsorbed by activated carbon. For example, the molecular weight of benzene is 78 The molecular weight of formaldehyde is 30, and the adsorption of benzene will be stronger.
3. Antibacterial and sterilization
Mainly through the nanosilver antibacterial net, it plays the role of antibacterial and sterilization. Its main principles are:
1) Contact reaction
More than 99% of harmful bacteria are single-celled; single-celled bacteria must rely on the oxidation of oxygen metabolic enzymes to breathe; the oxidation process of oxygen metabolic enzymes in the process of taking an electron from neutral particles. When the nanosilver particles are close to the bacteria, due to the Coulomb's gravity, the nanosilver particles will adsorb on the surface of the bacteria and enter the bacteria body;
Bacterial oxygen metabolic enzymes will seize an electron in the nanosilver particles so that the nanosilver particles become positively charged silver ions; the positively charged silver ions react with the negatively charged sulfhydryl groups in bacterial proteases. Loss and rapid loss of activity, resulting in bacteria being unable to divide and reproduce and be killed. When the bacteria lose their activity, silver ions will be released from the bacteria again, and the sterilization activity is repeated, so the antibacterial effect is long-lasting.
2) Photocatalytic reaction
Under the action of light, silver can act as a catalytic active center, activating oxygen in water and air, generating hydroxyl radicals (.0H) and active oxygen ions (O2 +), active oxygen ions have a strong oxidizing ability, Can destroy the proliferation of bacteria in a short time and cause cell death.
4. Negative ions
In nature, plant photosynthesis, waterfalls, and lightning can generate negative air ions. People compare negative ions in the air to "vitamins in the air." Negative ions ionize molecules in the air out of free electrons through a strong electrostatic field and form negative oxygen ions with oxygen molecules in the air. At the same time, they combine with bacteria cells in the air to change the internal structure of the cell and die. And make the formaldehyde, toluene, smoke and other inhaled particles in the air gather and settle naturally to achieve the purpose of purification. The super-strong continuous supply of negative oxygen ions effectively activates the oxygen molecules in the air, so that the air around you is full of vitality, more easily absorbed by the body, and also very beneficial to human health.
Why does the air need to be purified?
1）Upper respiratory tract infection
A large number of particles, dust, pollutants, viruses, etc. float in the air. Once inhaled by the human body, it will stimulate and destroy the mucosa of the respiratory tract, make the nasal cavity dry, and destroy the defense ability of the mucosa of the respiratory tract.
The degree of air pollution is heavier than usual, and bacteria and viruses are often carried in the air, which can easily lead to the spread of infectious diseases and the occurrence of various diseases. In particular, air pollutants in cities are not easy to spread, which increases the toxicity of sulfur dioxide, carbon monoxide, nitrogen oxides, and other substances, which will seriously threaten human life and health. Dust and smoke are floating in the air, and dust mites may also be suspended in the mist. Bronchial asthma patients inhaling these allergens will irritate the respiratory tract and develop asthma symptoms such as coughing, suffocation, and poor breathing.
The China Institute for Disease Control and Prevention has spent a year conducting research on the impact of haze on human health and found that in addition to the increased incidence of respiratory diseases/admission rates, haze weather also has some indirect effects on human health. The appearance of haze will weaken the radiation of ultraviolet rays. If haze occurs frequently, it will affect the body's vitamin D synthesis, leading to a high incidence of rickets in children, and enhancing the activity of infectious bacteria in the air.
4）Can cause cancer
PM2.5 levels are positively correlated with lung cancer morbidity and mortality. Existing research in China has also found that PM2.5 can enter the bloodstream, and what it carries can cause heart damage. In many European and American countries, this study has done nearly ten In the past few decades, it has been shown that for every 10μg / m3 increase in PM2.5, the mortality rate of lung cancer increases by about 17% -25%.
5）The hazards of formaldehyde
Formaldehyde is a colorless and easily irritating gas. Formaldehyde can be absorbed through the respiratory tract, and its aqueous solution "formalin" can be absorbed through the digestive tract. Long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, pregnancy syndrome, cause neonatal physical decline, chromosomal abnormalities, and even cause nasopharyngeal cancer. High concentrations of formaldehyde are toxic to the nervous system, immune system, liver, etc.
How to buy products?
In the market, there are many types of air purifiers available, ranging from a few hundred yuan to several thousand yuan. In general, the current technology is more mature and the cost-effective air cleaner There are several aspects to be aware of when choosing:
1）The function is relatively comprehensive: in addition to filtering PM2.5, it can also remove odors and volatile organic compounds, antibacterial, and sterilization, and release high concentrations of negative ions, so that the purification effect will be better
2）Purification index: PM2.5 removal rate is usually selected to be 99%, odor, formaldehyde, toluene averages more than 97%, and the concentration of released negative ions reaches 10 million. If there are related technical certifications, they are better machines. Off
3）Air quality detection sensor: This instrument is a high-precision instrument, which is currently the most ideally produced by General Electric Company (GE), with sensitive detection and high precision.
4）Selection of filter: Imported filter is relatively better, but the price is more expensive, and the difference in domestic production will not be too great. Since the filter is a consumable item, it needs to be replaced regularly, and it may not be necessary when selecting. imported.
5）The choice of purification area: according to your needs, choose the corresponding purifier for the office area and the household area. Generally, the larger the purification area, the more expensive the price. Choose the appropriate one.
Among many brands, Healthomse is good, with relatively high-cost performance.
Cleaning and maintenance:
1. The front filter (usually the back cover of the chassis) has been used for a long time, and it will collect some dust, which will affect the air intake and affect the effect of air purification. Therefore, you need to use a vacuum cleaner to suck the dust away, or clean it with a rag, or even wash it with water;
2. Activated carbon filter, need to get the sun under the sun regularly, the purification efficiency can be maintained better;
3. The air quality sensor needs to be wiped regularly with a cotton swab. Because it is a precision instrument, do not wipe it too hard;
4. When not using it for a long time, please unplug the power plug of the air purifier.
1. When placing the machine, make sure that the bottom of the machine and the planes in contact with it are stable, and that the place should ensure that the inlet and outlet of the machine are unobstructed;
2. The airspeed of the air purifier is generally selected from low, medium and high. The machine also has an automatic mode. Usually, the mid-range or automatic mode is sufficient. You can also choose the low-speed or high-speed mode according to the degree of indoor air pollution (such as air circulation, number of people in the room, etc.);
3. In the power-on state, you can choose to use the negative oxygen ion function according to your needs;
4. Do not use water, liquid, detergent or any flammable body to clean or spray into the machine.