Environmental pollution has been aggravated, air pollution is so that many sensitive people traveling to wear masks, even at home can not rest assured. Therefore, home air purifiers have become a hot product nowadays. In the purchase of air purifiers, what should I pay attention to?
The air purifier shopping guide
1. Choose the appearance, form
Common air purifiers on the market are wall-mounted, hanging, ceiling-mounted, desktop, floor-standing, and other forms, the user should choose the appropriate form according to the needs of the different purifiers can achieve the main performance indicators based on noise, power, volume, and other indicators should be the smaller the better. As different forms of air inlet and outlet will also affect the effect of the purifier, users should choose the form of air outlet according to the specific room layout.
2. Choose the manufacturer
No matter what brand of air purifier, identifying its technical content must look at three signs.
Look at which level of authority is issued by the technical identification certificate. For example, the purifier with the function of sterilization and disinfection must have a "health permit".
See whether the product can meet the specific standards of air hygiene and air quality set by the State.
See whether the handling air volume of the product can meet the size of the room you need to purify. In addition, pay attention to the quality of the manufacturer's after-sales service, because the cartridge needs to be replaced by the manufacturer when it fails. Usually one month after the use of the electrostatic field, it is necessary to carry out cleaning, the user in the choice of the electrostatic purifier, to ask whether the manufacturer will be timed to come to the door to clean.
3. Choose the air volume
General family room to choose the air volume of 200ma / h or so to meet the purification requirements, if the purifier has a CADR indicator, the user can based on the formula (2), (3) Select the appropriate CADR value. If there is no CADR indicator, the user can use the calculation formula: processing air volume (m / h) = room area (m) × room height (m) × number of cycles ( ). General requirements for the number of cycles for 5 ~ 1O times, for example, the area of 15m, the height of 3m room, the number of cycles for 5 times, and the purifier's air volume is 225m3 / h. The air volume of the purifier is 225m3 / h. The air volume of the purifier is 5 times.
4. Selection of Functions
A variety of luxury multi-functional purifiers are on the market to dazzle consumers, from the basic function of purifying air, they do not have any advanced features than ordinary purifiers. Summarised, there are some auxiliary functions as follows:
Infrared remote control. It is similar to the remote control of color TV.
Gas-sensitive smoke sensor. When the concentration of harmful gases in the room increases, for example, when someone smokes, there will be an indicator light on the panel of the air purifier and it will switch on automatically.
Human Body Sensor Function. When someone enters the room, the small radar mounted on top of the air purifier outputs a signal and switches on automatically.
Open flame sensor function. When someone lights a cigarette with a lighter in the room, the purifier will switch on automatically.
Special de-bacteria function.
Filter aging indicator function.
Dehumidifying and humidifying functions.
Carbon dioxide removal function.
There are different combinations of the above functions in different household air purifiers, but the more functions the purifier has, the higher the price and the more prone to malfunction, so it is recommended that users do not choose purifiers with a variety of auxiliary functions.
5. Other Attention
When the purifier is turned on, you should not smell the fishy smell of ozone at the air outlet; because some purifiers have high-voltage power supply, so the insulation of the charged parts should be good; finally, consumers should carefully read the manual, which is effective and reasonable to play the function of the purifier to play a multiplier effect.
The home air purifier purchase guide
1. Hoose the right purchase channel
When buying air purifiers, it is recommended to try to buy them in large shopping malls, electrical shops, brand shops mainstream e-commerce sites, and other regular channels. According to their actual needs to buy air purifiers, today, air purifier brands, features, performance, design, and price are very different, so people are dazzled. Consumers are advised to buy products according to their actual needs, not the more features the better. For consumers who need to protect PM2.5, it is recommended to choose an air purifier with outstanding PM2.5 purification ability. Newly renovated families can focus on removing formaldehyde and toluene ability to highlight the air purifier.
2. Filtration technology
Particulate pollutant filtration technology is mainly HEPA filter, HEPA filter quality varies, and some small brands of filters, although with high filtration efficiency, but resistance, energy efficiency ratio is relatively low, and it is easy to clog short life, generally recommended to use the depth of dust with electrostatic HEPA filter, electrostatic technology makes the non-woven fibers with a positive and negative charge, effectively capturing air particles, many HEPA filters, many HEPA filters are not suitable for use in the air purifier, but can be used in the air purifier. In particulate matter, many HEPA filters are claimed to have electrostatic electret technology, but due to technical reasons, many filters' electret charge in a relatively short period will decay very quickly, resulting in lower filtration efficiency. It is recommended to choose a 3M electrostatic electret air filtration material HEPA filter, and 3M masks with the same electrostatic electret technology, permanent guarantee electret efficiency does not decay. High efficiency, low resistance, and large dust capacity are the hard truth.
Concerned about the applicable area or particulate clean air volume (CADR); air purifier purification ability of the strong and weak, mainly by the applicable area and particulate clean air volume (CADR: the rate of clean air provided) to determine the relationship between the two: the applicable area = CADR × 0.1. purification ability of other pollutants should be combined with the applicable area.
3. Energy efficiency ratio and energy efficiency rating
Air purifiers are usually used continuously for a long period, and the energy efficiency ratio is worth your attention as an important indicator of the purification capacity and power consumption of air purifiers. The higher the energy-efficiency ratio and energy-efficiency rating, the more energy-efficient the air purifier is and the lower the cost of use.
4. Ozone Emission
Ozone as a strong oxidant has a certain purification ability, but it is harmful to the human body. The national air purifier ozone emissions have mandatory safety requirements, limited to ≤ 5 × 10-6% (ozone has a fishy smell).