Why do you know when you want to use an air purifier?

Air purifiers have now become the “standard weapon” for protecting our health in our lives. We can say that this “weapon” is a light vehicle. But what are the specific functions of the air purifier? I believe that most people just know that it has the effect of purifying the air. Let me share with you why you should use the air purifier and what harmful substances it can purify.
One: natural air pollution
The intuitive reason for using an air purifier is natural air pollution. Natural air pollution is what we usually call PM2.5. The harm of the dust itself is not serious, but the PM2.5 particles have large area and strong activity, and are easy to be attached with toxic and harmful substances (for example, heavy metals, microorganisms, etc.), and have a long residence time in the atmosphere and a long transportation distance. The effects of human health and the quality of the atmospheric environment are greater.
Two: pollen
Pollen is also an important factor in the use of air purifiers. Many people don't care about pollen. They think that pollen will not affect themselves. In fact, during the high incidence of pollen, sneezing, runny nose, tears, stuffy nose, etc. are all manifestations of pollen allergy symptoms, but this is an allergic phenomenon. It is not obvious and we are automatically ignored. Allergic children are severely affected. Children with skin allergies may inexplicably lose their temper, be too active, jump, slap, fatigue, huddle in dark corners under tables and chairs, under the bed or in furniture, refuse to be touched. I don't want to dress, undress, etc. Skin allergies in children can lead to significant changes in mood and behavior, hyperactivity, can not sit quietly eating, irritability, fatigue, violations, frustration, aggressive behavior, shaking legs, lethargy or nightmares, intermittent speech difficulties.
Three: dust mites
Dust mites have been recorded in 34 species, of which the main types related to human allergic diseases are house dust mites, dust mites and buried oysters. In addition to mites and sputum prevention, patients with dust mites allergies are also allergic to other substances. Dust sputum asthma is inhaled asthma, often in early childhood, has a history of infant eczema, or a history of chronic bronchiolitis. Suddenly, recurrent episodes are characteristic of this symptom, followed by chest tightness and shortness of breath, unable to supine, and expiratory breathing difficulties. In severe cases, due to lack of oxygen, the lips and fingertips appear purplish. At the same time, the incidence of allergic rhinitis is inseparable from dust mites. Because of the existence of pollution sources such as formaldehyde, second-hand smoke, dust, pollen, and dust mites, the use value of air purifiers is only available.
Four: secondhand smoke
The harm of secondhand smoke is not to be underestimated. In the "China's Smoking Hazard Health Report" issued by the Ministry of Health, smokers in China over 15 years old are close to 30%; adult males are more than 50% smokers, and China's smokers reach 301 million. In second-hand smoke, there are more than 3,000 kinds of polluting chemicals. In addition to the lung cancer that people usually think of, smoking can cause many serious diseases, including malignant tumors such as oral cancer, laryngeal cancer, stomach cancer and liver cancer; asthma, chronic obstructive pulmonary disease and other respiratory diseases. Diseases; coronary heart disease, stroke, cardiovascular and cerebrovascular diseases; male erectile dysfunction, decreased fertility in women and other reproductive problems. At the same time, second-hand smoke is more harmful to children's health, so it is especially important to smoke household air purifiers.
Five, formaldehyde
In China, in fact, users first understand the air purifier, not smog but formaldehyde. Because of the "not enough" decoration materials, formaldehyde is the leader of indoor pollution, and it is also a unique pollution problem for Chinese families. Formaldehyde raw materials will be attached to the wardrobe, floor and paint, and it is a long-term volatile process. At the same time, harmful pollutants such as formaldehyde and benzene are also high pollutants. The incidence of "acute leukemia" is mostly caused by the renovation of the family. It is a long-term hazard and a serious hazard. It is the most important characteristic of gaseous pollutants such as formaldehyde.
In the face of the above problems, choosing a strong air purifier is a good choice, but because of the numerous brands of air purifiers, we must carefully consider the choices. Under normal circumstances, the quality of empty net products will be more important. There are some guarantees. The domestic big brand Yadu recently launched a new product, Yadu double-faced VT (Pro) air purifier, this air purifier built a new four-in-one platinum filter, set four-fold filter into one, the first layer is nano silver NANO-AG high-efficiency antibacterial filter, primary filtration, blocking dust, hair, dander and so on in the air. The second layer is a catalytic coconut shell activated carbon filter that adsorbs formaldehyde and particulate matter in the air. The third layer is a platinum UFCO platinum decomposition layer that directly catalyzes formaldehyde in the air to harmless carbon dioxide and water. The fourth layer is a HEPA filter, high-density fiber, which intercepts tiny suspended particles in the air and provides a full range of empty net care.
If you want to do something good, you must first sharpen your tools. In the face of indoor air pollution, air purifiers are a good choice. The 30-year-old big brand Yadu has built a lot of good reputations with the spirit of “artisan craftsmanship”. Environmentally friendly products have laid the foundation for people to enjoy a comfortable and beautiful life.

Incremental Encoder

Incremental encoders provide speed, direction and relative position feedback by generating a stream of binary pulses proportional to the rotation of a motor or driven shaft. Lander offers both optical and magnetic incremental encoders in 4 mounting options: shafted with coupling, hollow-shaft, hub-shaft or bearingless. Single channel incremental encoders can measure speed which dual channel or quadrature encoders (AB) can interpret direction based on the phase relationship between the 2 channels. Indexed quadrature encoders (ABZ) are also available for homing location are startup.

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