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Interviewed experts:
Lu Jianguo, Director of the Comprehensive Inspection Department of the National Household Appliance Quality Supervision and Inspection Center
Song force national household appliances Quality Supervision and Inspection Center engineer strong
Song Guangsheng, Director of the National Indoor Environment and Indoor Environmental Product Quality Supervision and Inspection Center
easy to use? Light and publicity is not reliable
As people pay more attention to the home environment, air purifiers are sought after. This new type of home appliance claims to absorb, decompose or convert various air pollutants, including formaldehyde, odor, dust, etc., to improve air cleanliness, and has become the home appliance of choice for many people. However, there are so many types of purifiers on the market that they are dazzling. How to "see the flowers in the fog"? In this regard, the "Life Times" reporter conducted an investigation and interview.
On the afternoon of February 20th, our reporter came to Dazhong Electrical Appliances Mall near Dawang Road, Chaoyang District, Beijing. Just approached the second floor of a shop selling air purifier products. The sales staff enthusiastically went forward and asked: “ How big is your home? Is it just finished?†Then I will introduce the purifier function ranging from a few hundred to several thousand yuan: “Look at this, mark 'PM', mainly to clear PM2.5, the effective area is 60 square meters; this, not only can remove PM2.5, but also remove formaldehyde, benzene, odor, effective area is 100 square meters. It uses our patented technology, that is Filter filters of tens of dollars are required to be replaced regularly. The most expensive platinum block parts can last up to 15 years, as long as they are cleaned regularly and exposed to the sun, which is particularly economical."
The reporter looked through the instructions of an air purifier priced at about 3,000 yuan, which stated that the product can effectively purify the particle diameter as small as 0.3 microns due to the use of a high-efficiency air particulate filter (HEPA). And the purification efficiency of various bacterial groups reached 99.9% or more. When the reporter questioned the purification effect, the salesperson did not hesitate to pat the chest to ensure that "no problem." "Can we still talk about it? Now consumers know that they are looking for a testing company. If they buy it back, the detection and purification effect is not up to standard, and we must not go to court with us. That is hundreds of thousands of compensation."
In the face of such a recommendation, probably many people will be tempted. Is this really true?
Song Liqiang, a home appliance expert, told this reporter that according to the current national standards, it is tested with particles with a particle diameter of 0.3 microns. Therefore, if the business publicizes it, it can effectively filter particles larger than 0.3 microns, and even 100% filter out such a size. Particles are also possible.
Lu Jianguo, a home appliance expert, said that the current air purification technology is relatively mature, as long as the equipment is good enough, it can indeed play a sterilization function. However, he stressed: "When it comes to purification efficiency, there must be preconditions. For example, if the merchants promote their purification efficiency as high as 99% or even 99.99%, they should also explain under what conditions, how much space, and how long. Achieved. If not stated, it may be questioned by consumers, or even false propaganda. Lu Jianguo suggested that consumers should ask the merchant for the test report of the product when purchasing the air purifier, and check the legality and authenticity of the testing institution.
how to use? Try to stay away from people and walls
1. How do you choose an air purifier for rooms of different sizes?
Song Liqiang, a home appliance expert: The current national standard requires that all products must be marked with the amount of “clean airâ€. Clean air volume = 2.3 × room volume / time. That is to say, an air purifier with a clean air volume of 100 can only be used in a room of 42 cubic meters if it is to purify 90% of the inhalable particles in one hour. Assume that the height of the room is 3 meters and the area of ​​use is 14 square meters. However, there are many products that directly indicate the coverage area. Since the purifier is easy to move in each room, it is only necessary to select the product that meets the largest room area in the home.
2. Do you want to use the purifier to open the window?
Song Guangsheng, an indoor environment expert: Use air purifiers in the case of serious air pollution or indoor environmental pollution. It is best to close the doors and windows to ensure a good purification effect. If the atmospheric air quality is good, there is no need to turn on the air purifier for a long time, and ventilation should be the first choice. Purifiers and humidifiers can be combined in summer and winter for better results.
3. How should the air purifier be placed?
Indoor environment expert Song Guangsheng: The air purifier should not be placed on the wall or furniture as much as possible. It is best to put it in the middle of the house or leave the wall more than 1 meter away from the use. Due to the high amount of harmful gases around the purifier, it is generally not allowed to place it too close to the human body. However, the purifier used to remove cigarette smoke can be closer to the smoker.
4. Should I use an air purifier in the car?
Song Liqiang, an expert in home appliances, and Song Guangsheng, an indoor environmental expert: At present, car air purifier products are less common in the market, and the effect remains to be tested. It is recommended to maintain the interior environment from the following five aspects: do not open air-conditioning, air conditioning, use less internal circulation, do not use air fresheners frequently, do not close the window for a long time, and ensure the interior of the car.
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