HC air-conditioning refrigeration network news autumn wind, the weather is getting cold. Come with the fall, in addition to the thoughts and smog. Recently, the reporter found that the sales of anti-fog windows and air purifiers on the market gradually became hot, and in the autumn as the decoration season, the formaldehyde detectors on the network also began to sell well. Are these air “artifacts†effective? Can it really help us block indoor air pollution? On the occasion of the October 10th World Health Day, the reporter walked into the Shanxi Provincial Indoor Environmental Pollution Prevention Association to find out.
Online shopping for formaldehyde detectors is not reliable
When it comes to indoor air pollution, the first thing people think of is formaldehyde. Excessive concentrations of formaldehyde in the air can significantly irritate the mucous membranes, damage the respiratory system and even cause cancer; even if the concentration is not high, long-term exposure may cause chronic respiratory diseases. Especially for children and the elderly who are weaker, the harm is even greater.
After the renovation of the new house, is the indoor pollutant such as formaldehyde exceeding the standard? Many people choose to buy a formaldehyde detector self-test online. The reporter found that there are thousands of various formaldehyde detectors sold online, ranging in price from tens of yuan to tens of thousands of yuan, with the largest sales within one hundred yuan. Among them, one seller sells for only 39.99 yuan each, and the monthly sales volume reaches 24,994 units. "Double-core computing detection is faster" "higher precision double-digit precision"... Almost every seller claims that the test results are comparable to professional testing instruments. So, what is the actual effect?
Li Hua, deputy secretary-general of the Shanxi Provincial Indoor Environmental Pollution Prevention and Control Association, told reporters that they had conducted comparative tests. "Professional instruments use phenol reagent spectrophotometry, and the sampling time is 20 minutes." Li flowers said, phenol reagent spectrophotometry Accuracy is high, but the measured data needs to be analyzed by the laboratory, which takes at least two working days. The "air formaldehyde self-test box" from online shopping can produce results in about 10 minutes. The result data of the two can be different by a hundred times.
Li flowers suggested that before the citizens stay in new houses, it is best to choose a formal institution to check the indoor formaldehyde content. After staying, they should also maintain long-term ventilation and be equipped with green plants. If you feel dizziness, headache, fatigue, blurred vision, persistent cough, decreased immunity, etc., it is best to seek medical attention as soon as possible, test the indoor environment, and find qualified professional institutions to remove formaldehyde.
Anti-fog function has limited window effect
Last autumn and winter, the smog weather frequently exploded, which made people pay more attention to environmental protection, but also brought new demands to the decoration market. Some windows are popular in the market for their ventilation and anti-fog functions. The reporter found on the Internet that the materials are different in these products. The business introductions are mostly nano-film, microporous film, electrostatic cotton, electrostatic mesh and other materials. The price is also uneven, with the higher price reaching thousands of yuan per square meter, and the cheaper price is only tens of yuan per square meter. Many sellers of anti-fog screens claim that the goods are “German technology†and “Austria imported materialsâ€. Most of the advertisements are smog by "windy and ventilated windows". In the introduction text, most of them claim that their materials are small in diameter, and some are even thinner than the hair. Some have also done their own experiments to prove effective.
In this regard, Li Huahua said that there are two working principles of anti-fog screens. One is static resistance, air convection, and the screen will produce negative static electricity that is not perceived by humans. Most of the dust particles carry negative charges. It is blocked under the action of “negative and negative repulsiveâ€; while the dust particles carrying positive charge are quickly adsorbed on the surface of the gauze. Due to the use of special high-tech fiber materials, the static electricity generated by the screens will last for a long time, and it will not easily disappear, which will provide dust barrier performance. The other is through microporous filtration, which is a pore size smaller than the PM value, smaller than PM2.5, for a physical barrier. The anti-fog screens can indeed filter out some of the pollutants, but the air flow is inherently poor due to the haze, and the anti-fog screens are thicker, making it difficult to achieve the desired air exchange effect. The use of anti-fog screens can only reduce the entry of polluted air, but it cannot “clean up†the existing pollutants in the room. She pointed out that some good home habits can also improve indoor air quality. For example, items such as sofa covers and curtains that are prone to dust should be washed frequently, and the table and chairs should be wiped with water to increase the humidity of the air. The bedding set in the bedroom can be wiped with a wet towel to absorb small bubbles in the air. dust. If you want to further circulate and clean the air in the room, you can choose a small potted plant to absorb the harmful gases in the clean room and absorb the radiation from the appliance.
Open air purifier or cause secondary pollution for 24 hours
In addition to replacing the windows, some people also choose to take the initiative to attack, the air purifier has become the "artifact" of many families indoors. Searched by consumers, the reporter searched for “air purifiers†on a shopping website. Among the nearly 8,000 items displayed, the most sold air purifier sold more than 49,000 units in the past month. The gap is also very large, ranging from nearly 1,000 yuan to more than 10,000 yuan. The price of the purifier with a large sales volume is about 2,500 yuan. In addition to formaldehyde, sterilization, and pollen removal, it has become a common air purifier function.
"To combat indoor air pollution, the air purifier is still effective. Although it does not achieve the purification rate of more than 99% promoted by many manufacturers, it can at least reduce the concentration of fine particles above 50% in the room." Li said that if in the air In the case of serious pollution, use an air purifier. It is best to close the window for better results. However, when the air purifier is bought home, it is not once and for all. The use of an air purifier in a closed space for 24 hours may cause secondary pollution. When the air quality is improved, natural ventilation should be a better choice.
According to a survey conducted in China, Chinese urban residents spend nearly a dozen hours indoors every day, while children and young people are sensitive to indoor air pollution. The formaldehyde produced in the new campus and the smog in autumn and winter are easy for children to suffer. On various diseases. The reporter learned that in order to allow children to breathe healthier air, Beijing, Shandong and other places have equipped air purifiers and fresh air systems for some primary and secondary schools. Li said that at present, the association is also actively promoting this matter, and appeals to people from all walks of life to pay attention to the indoor environment and care for family health.
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Pet Accessories is the classification of Pet Clothes. It is a small item worn on pets and plays a decorative role.
Pet Accessories can be divided into the following categories.
First, the class clamped on the hair.
It is mainly hairpins, which need to be clipped on the hair, like Pet Hair Bows, so it is more suitable for pets with longer hair.
Second, the kind worn on the head.
It is mainly a hat with ears exposed, which makes pets feel comfortable.
Third, the kind worn on the neck.
There are necklaces, cape and scarves, which can be adjusted within a certain range. Choose according to the neck circumference of your pet.
These pet decorations will be divided into daily series and festival series. The daily series can be worn at ordinary times. The festival series is designed with festival elements, such as Halloween and Christmas. Wearing these decorations on pets during festivals can not only increase the festival atmosphere, but also cooperate with the decorations at home and the owner's clothes.
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