Do not look regretted air purifier purchase points
Today, the importance of air quality is no longer necessary. The invisible killer hidden in our decoration, such as formaldehyde and bacterial allergens, is also endangering the health of the family. Chai Jing’s previous sensational investigation Under the Dome, the alarm bell is awakened. For the health of children, air purifiers are increasingly becoming a favorite thing. But in the face of a large number of brands on the market and products with different appearance, price and performance, how do we choose?
At present, the objective and effective air purification method is not only the best indoor air purifier but also the emerging fresh air system. Before buying, we can first understand the main differences and advantages and disadvantages of the two.
1, air purifier
Advantages: can be used alone, easy to install, and the cost is lower than the new wind;
Disadvantages: The function of the how to buy best air purifier is to purify the indoor air. There is no way to replace the air with high oxygen content. The room will be boring when it is closed for 8 hours.
2, fresh air system
Advantages: The purpose of the work is to complete indoor ventilation and ventilation without opening the window. It can ensure indoor oxygen and avoid excessive carbon dioxide. In the case of poor outdoor air quality, ventilation problems and formaldehyde problems can be solved.
Disadvantages: The fresh air system is expensive, installation is cumbersome and has restrictions on the structure of the house.
Buying suggestions: If the new house is renovated and can accept the perforation and hole punching operation, the fresh air system can be preferred. If you don’t want to work so hard, you can still use the cost-effective air purifier. However, the fresh air system and the air purifier are not an alternative. For weather like Beijing, consider using a fresh air system with an air purifier for double insurance.
Compared with the fresh air system, the air purifier has a wide range of applications, so let’s talk about how to choose a suitable and high quality air purifier.
Air purifier classification
According to the working principle and purification technology can be divided into three categories:
Passive purification class (filter purification class)
Advantages: pure physical filtration, filter determines the quality of purification, mainly filters PM2.5, formaldehyde or bacteria and other pollutants, less pollution;
Disadvantages: filter replacement costs are more expensive;
Active purification class (no filter type)
Advantages: It mainly removes soot, pollen, cigarette flavor, kitchen fume and other gases through electrostatic dust collection, traditional metal plate, honeycomb resin plate and other dust collection paths. It is a non-consumable product and only needs regular cleaning. No major expenses are required in the later period.
Disadvantages: The technology is not mature, there will be ozone and other pollutants.
Double purification (active purification + passive purification): usually based on HEPA / activated carbon filter, supplemented by negative ions, photocatalyst and other technologies. Combines the advantages and disadvantages of the above two purification technologies.
Dual purification representative brands: (1) Sharp (filter + plasma ion group technology); (2) Blueair (filter + negative ion technology); (3) Philips (filter + negative ion technology)
At present, there are many manufacturers of air purifiers, mainly divided into Europe, Japan, South Korea, China and the new generation of the four major factions, in addition to Sharp, Haier, Midea, Panasonic, these familiar old brands, Xiaomi, Leopard, three fathers and other technology The new face of innovation has gradually emerged. With so many choices, don’t be blinded by brands or black technology, grasp important parameters, and understand the data is the last word.
Buying must-see seven elements
1, filter material. The filter is now divided into two types: HEPA filter and filter activated carbon filter. The HEPA mesh is characterized by air passing freely, but fine particles cannot pass. For now, it is the most effective filter medium for smoke, dust and bacteria. So the filter is directly related to the purification effect. The width and thickness of the left filter are obviously larger than the right purifier. The effect will be better.
2, CADR value (purification efficiency): the volume of clean air per hour. CADR is the core technical indicator of air purifier. The larger the CADR value, the stronger the air purification capability. The following is the proportion of different use areas in the first quarter of 2017, indicating that most people have a unique ability to “high performance” of CADR. Clock, however, it is not necessary to choose the maximum CADR value, as long as the applicable area of the house <= (0.07~0.12)*CADR, the best purification effect can be achieved.
3, CCM value (cumulative purification, service life): CCM value refers to the cumulative amount of purified air, reflecting the service life of the filter, divided into four levels of P1-P4, the CADC value is unchanged, the CCM value is more High, indicating that the life of the air purifier is longer. Service life is also an important feedback for price/performance, so it is also a focus of attention.
4, purification energy efficiency: CADR value / rated power, purification energy efficiency is higher and more energy-saving, if open 24 hours a day, if the power-saving capacity is insufficient, the electricity bill is a large expenditure.
5, noise: Power consumption noise is also an important indicator to measure the technical level of the manufacturer and the quality of the materials used, but the qualified household machine, the air volume will not exceed 70 dB (A), this can be seen personal tolerance.
6. Demand: Select the air purifier according to the type of pollutants to be purified. HEPA has a strong purifying function for soot, suspended particles, bacteria and viruses. The catalytic activated carbon has better purification effect on harmful objects generated after decoration. The most attention to the current air quality will of course be placed on the purification effect of PM2.5.
7, after-sales service. After the purification filter is invalid, it needs to be replaced by the manufacturer, so you should choose the products of the enterprise with perfect after-sales service.
Summary: When purchasing an air purifier, please refer to the “three high and one low” principle: high CADR value, CCM value, high energy efficiency ratio, low noise.
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