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01outdoor air pollutionThere is no doubt that the air is circulated. Even if there is no window for ventilation, our indoor environment is not a full vacuum environment. It has frequent circulation with the outdoor atmosphere. When outdoor air is polluted, more than 60% of the pollution in indoor air is related to outdoor air.02Human body's own activity pollutionSmoking indoors, cooking in the kitchen, the burning of gas stoves, the use of air conditioners and refrigerators, and various other household appliances will increase indoor air pollution. Among them, the harm of smoking is the most obvious. Just smoking one cigarette can increase the indoor PM2.5 concentration by 5 times within 4 minutes.03Invisible sources of pollution in indoor environmentsInterior decorations, accessories, wall paint and furniture, etc., no matter how good the quality is, contain chemical substances, which will increase indoor air pollution.Knowledge point: What does PM2.5 mean?Fine particles, also known as fine particles and fine particles, refer to the particles in the ambient air whose aerodynamic equivalent diameter is less than or equal to 2.5 microns.Does it feel like: I understand, but I don't fully understand...It doesn't matter, you just need to remember that PM2.5 can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution is.How big is 2.5 microns? Um... have you seen a one-dollar coin? Almost ten thousand 2.5 microns = 1 fifty cent coin.02air purifierCan it really purify indoor air?01working principleThe general principle of the air purifier is to use a motor to draw in the indoor air, then filter the air through layers of filters, and then release it, and purify the indoor air through such a filter cycle. If the filter screen of the purifier can effectively absorb harmful substances, it can play the role of purifying the air.02Internationally recognized for indoor air purificationDue to the persistent and uncertain characteristics of pollutants in indoor air, the use of air purifiers to purify indoor air is currently an internationally recognized method to improve air quality.03How to choose an air purifierFor the selection of air purifiers, the following four hard indicators should be paid attention to01Fan air volumeThe efficient purification effect comes from the strong circulating air volume, especially the air purifier with fan. Under normal circumstances, it is best to use an air purifier with an air volume of 60 cubic meters per second for a room with an area of 20 square meters.02Purification efficiencyA higher purification efficiency (CADR) number indicates a higher efficiency of the air purifier. Generally, the purification efficiency value required is more than 120. If the air quality is required to be higher, you can choose a product with a purification efficiency value of more than 200.03energy efficiency ratioThe higher the energy efficiency ratio value, the more energy efficient the air purifier is. For an air purifier with a good energy efficiency ratio, its energy efficiency ratio value should be greater than 3.5. At the same time, the energy efficiency ratio of an air purifier with a fan is higher.04 safety An important indicator of air purifiers is the ozone safety indicator. Some air purifiers that use electrostatic purification, ultraviolet disinfection and negative ion generators may generate ozone during operation. Pay attention to the ozone indicator of the product.04improve indoor airWhat else can we do?01 open windows for ventilationThis is the best way to purify indoor air. When the air quality in the city is good, choose to open the windows at noon in the morning. The length and frequency of window opening time can be determined according to the comfort level of indoor people.02Indoor humidificationIf the indoor humidity is too low, it will exacerbate the diffusion of PM2.5. Using an air humidifier to humidify indoor air can lower the PM2.5 index. Of course, if possible, do a good job of dust removal in the room every day, and use a damp cloth to wipe the indoor desktop window sill and the floor when there is no dust accumulation in the room.03reduce man-made pollutionNot smoking is the most effective way to control indoor PM2.5. When cooking in the kitchen, be sure to close the kitchen door and turn on the range hood at the same time.04 Choose green plantsGreen plants have a good effect of purifying the air. They can absorb carbon dioxide and toxic gases, and release oxygen at the same time. Raising more green plants is equivalent to creating a small forest at home. The green plant that purifies indoor air is Chlorophytum. In the laboratory, spider plants can absorb all the harmful gases in the experimental container within 24 hours. Followed by aloe vera and monstera, both have unexpected effects on purifying the air.

Air purifiers are also called air purifiers. The main function of air purifiers is to decompose indoor polluted air and replace outdoor fresh and healthy air with indoor air, thereby ensuring indoor air quality and creating a healthy and comfortable living environment.Many people don't know much about air purifiers. Many people will ask if air purifiers are useful and think it is optional. In fact, air purifiers are closely related to our home life. The role is more and more important in today's serious environmental pollution. Let's take a look at the uses of air purifiers.1 Particles in the settled airThe air purifier can effectively settle various inhalable suspended particles such as dust, coal dust, smoke, and fiber impurities in the air, so as to prevent the human body from breathing these harmful floating dust particles.2 Removal of microorganisms and pollutants from the airAir purifiers can effectively kill and destroy bacteria, viruses, mold and mildew in the air and on the surface of objects, and at the same time remove dead skin flakes, pollen and other sources of disease in the air, reducing the spread of diseases in the air.3 Effectively eliminate odorThe air purifier can effectively remove the strange smell and polluted air from chemicals, animals, tobacco, oil fumes, cooking, decoration, and garbage, and replace the indoor gas 24 hours a day to ensure a virtuous cycle of indoor air.4 Quickly neutralize chemical gasesAir purifiers can effectively neutralize harmful gases emitted from volatile organic compounds, formaldehyde, benzene, pesticides, misted hydrocarbons, paints, and at the same time achieve the effect of physical discomfort caused by inhaling harmful gases.Is air purifier useful? I think the answer is obvious. Air is the only thing that is with us 24 hours a day but cannot be seen. Its impact on the human body is subtle and accumulated over time. If we do not pay attention to air quality for a long time, it will affect our health and Life efficiency, it turns out that air purifiers are not only useful, but one of the must-haves in home life.

Visible pollution, we still have ways to defend against it, but invisible pollution like air pollution is really hard to prevent.Especially for people who are particularly sensitive to air odors, pollution sources, and allergens, air purifiers have to become standard at home.Are you having trouble choosing an air purifier? Today, the editor will bring you air purifiers to buy dry goods. After reading it, you will know how to choose!The air purifier is mainly composed of a fan, an air filter and other components. The fan in the machine makes the indoor air circulate and flow, and various pollutants in the air will be removed or adsorbed by the filter in the machine.When we buy an air purifier, the following points should be paid special attention to.1. Clarify your own needsEveryone's needs for buying an air purifier are different. Some need dust removal and haze removal, some just want to remove formaldehyde after decoration, and some need sterilization and disinfection...The editor recommends that before purchasing, you should first clarify what kind of needs you have, and then choose an air purifier with corresponding functions according to your needs.2. Look carefully at the four major indicatorsWhen we buy an air purifier, of course, we must look at the performance parameters. Among them, the four indicators of clean air volume (CADR), cumulative purification volume (CCM), purification energy efficiency value and noise value must be carefully read.This is an indicator of the efficiency of an air purifier and represents the total amount of air purified per unit time. The larger the CADR value, the higher the purification efficiency and the larger the applicable area.When we choose, we can choose according to the size of the space used. Generally, small and medium-sized units can choose a CADR value of about 150. For larger units, it is best to choose a CADR value of more than 200.The gaseous CCM value is divided into four grades: F1, F2, F3, and F4, and the solid CCM value is divided into four grades: P1, P2, P3, and P4. The higher the grade, the longer the service life of the filter. If the budget is sufficient, it is recommended to choose the F4 or P4 level.This indicator is the amount of clean air produced by the unit power consumption of the air purifier in the rated state. The higher the purification energy efficiency value, the more power saving.Generally, the energy efficiency value of particulate matter purification is 2 for qualified level, 5 is for high-efficiency level, while the energy efficiency value of formaldehyde purification is 0.5 for qualified level, and 1 is for high-efficiency level. You can choose according to the actual situation.Noise valueThis indicator refers to the corresponding sound volume when the air purifier reaches the maximum CADR value in use. The smaller the value, the smaller the noise. Since the purification efficiency mode can be adjusted freely, the noise of different modes is different.Generally, when the CADR is less than 150m/h, the noise is around 50 decibels. When the CADR is greater than 450m/h, the noise is around 70 decibels. If the air purifier is placed in the bedroom, the noise should not exceed 45 decibels.3. Choose the right filterThe filter screen can be said to be the core part of the air purifier, which contains a lot of "high-tech", such as HEPA, activated carbon, photocatalyst cold catalyst technology, negative ion silver ion technology and so on.Most air purifiers on the market use HEPA filters. The higher the filter grade, the better the filtering effect. Generally, H11-H12 grades are basically enough for household air purification. Don't forget to replace the filter regularly when using it.

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