The necessity of air conditioning cleaning;
In the opinion of health experts, air conditioners that are not cleaned regularly are extremely unsanitary: they are dark and humid all the year round, accumulate dust and accumulate fibers, and breed germs, viruses, molds and mites. It produces peculiar smell, causes air-conditioning disease and leads to rough skin, which is also one of the reasons for the increase in the incidence of asthma in children in recent years. At the same time, the blocked dirt affects air conditioning refrigeration and increases power consumption.
In 1970s and 1980s, the United States, Japan and other countries successively legislated to force public places (hospitals, restaurants, etc.). ) Clean the air conditioner regularly, otherwise it is illegal! For a long time, the image of tuberculosis patients has been fixed as poor people suffering from chronic diseases and lacking nutrition. In the fourth epidemiological sampling survey of tuberculosis in Guangzhou, it was found that comfortable living environment will also become an accomplice of tuberculosis, and the already declining tuberculosis is making a comeback with the help of new conditions of modern life.
Recently, the fourth epidemiological survey of tuberculosis in Guangzhou, which was synchronized with the whole country, showed that two-thirds of the patients were newly discovered, that is, they didn't know they were sick, and only 10% of the infected patients went to the hospital voluntarily. In a community in Fangcun District, doctors found that three generations of three people in a family had tuberculosis. Grandma is the source of the disease. She coughed for years and excreted the bacteria of tuberculosis. However, her son and granddaughter think that she is just an old man with asthma. How can she not be infected?
Luo, director of the Guangzhou Institute of Tuberculosis Prevention and Treatment, said with concern that people have a misunderstanding about tuberculosis and always think that they will not get tuberculosis if their living conditions are good. According to the doctor's observation, many people with tuberculosis in recent years are rich people and bosses. This is related to their long-term activities in a closed air-conditioned environment. These people usually use air conditioning in the office and at home, and eating and drinking in restaurants or karaoke are inseparable from air conditioning. Closed environment and room temperature like spring all the year round will become hotbeds for rapid breeding of tuberculosis, and too much involvement will increase the chances of infection.
People who use air conditioners for a long time will find that the cooling and heating effect will obviously decrease after the air conditioner works for a certain period of time, and it is accompanied by some strange smells. Living in this environment for a long time, people often feel dizziness, fatigue, colds and other symptoms, experts remind: this is air conditioning syndrome. So why do these phenomena occur and how to solve this problem?
This is because the air conditioner works in a closed environment and the indoor air quality drops. The main reasons for the decline of air quality are the increase of human metabolites, CO2, waste gas and dust produced in the process of life. During the operation of the air conditioner, these substances will be firmly assembled on the evaporator fin of the indoor unit of the air conditioner, thus affecting the cooling and heating effect of the air conditioner. More importantly, these dirt and pollutants carry bacteria, which will breed many molds, bacteria and germs. When the air conditioner works again, these bacteria will quickly spread into the indoor air under certain conditions, which will increase the bacterial content in the air. If people live in this environment for a long time, it is easy to get sick, especially the elderly and children with low immune function.
The reporter conducted a random interview with the citizens in the street. Most people still have a certain understanding of mites and allergic dermatitis; However, few people know that air conditioners can "raise" mites so quickly, and few citizens can clean the air conditioning vacuum network every other week.
In the first consultation of dermatology in Shanghai, among 384 patients with dermatosis who came to the site for consultation, a considerable number of allergic dermatitis patients were caused by mites. In the clinical investigation of dermatology in more than ten municipal hospitals such as Shanghai Ruijin, Huashan, Changhai, Changzheng, Shiyi, Liu Shi, Xinhua and Dermatology Prevention Hospital, the average number of allergic dermatitis patients caused by mite bites is about 50% due to the "evil" of household air conditioners.
Many patients report that the weather is getting hotter and hotter after summer, especially when the rainy season comes, and the sultry weather makes people uncomfortable. So I turned on the air conditioner at home for the first time, but when the cold wind blew, my body was red and swollen like red beans. Then it itched, so I scratched "red". Many people mistakenly think that they have a blood disease, which also causes panic. Li Fang, the chief physician of the dermatology department of Huashan Hospital, said that it was actually bitten by mites, which made it "red and swollen like red beans" and often "bite one and send one".
When the air conditioner is turned on for the first time, there will be a wind mixed with the smell of mildew and dust, and a large number of mites are hidden in this cool wind. Tests show that there are at least 10,000 mites blown out by dirty air conditioners. Many families buy their own air conditioners, but they never clean the vacuum net after use. In this way, a large number of dust, mites, pollen, lice and mold are adsorbed on the vacuum net. As soon as the air conditioner is turned on, these germs, viruses, molds and dust are blown out by the air conditioner, which can cause a large area of infection.
What's more, many people go home from the outside and are used to standing directly in the air conditioner? Quot Blow cold ",mites will" pounce "head-on, directly absorb human bites, causing allergic dermatitis. Many patients with allergic dermatitis are taxi drivers. They sit in narrow carriages all day, facing the air conditioners directly, which are never cleaned. The doctor said that they were most harmed by mites. After the taxi contracting responsibility is implemented, the driver is responsible for the maintenance and cleaning of the air conditioner. Every summer or winter, drivers just add medicine to the air conditioner in time, and almost no one cleans it.
In this way, as soon as the air conditioner is turned on, thousands of mites will "pounce" head on. The first victim was the driver, followed by the passenger. A person from a taxi company said that as long as the air conditioner itself is not bad and can blow, most drivers will not have the consciousness of cleaning the air conditioner. Generally speaking, the air conditioner on the car can at least ensure that the car travels 90-1.20 thousand kilometers. Converted into driving time, it is a whole year. The reporter immediately interviewed some taxi drivers on the road. No one knows that if the air conditioner is not cleaned, it will bring trouble to mites.
A driver even said that he had "not cleaned the air conditioner for four years". After listening to the reporter's introduction, the driver suddenly realized, "No wonder there are itchy red spots on his arms in summer." The reporter learned from several bus fleets in Shanghai that, generally speaking, bus air conditioners are cleaned once a month by the fleet, and the daily cleaning work is entirely borne by the drivers themselves. However, most drivers often neglect to clean the air outlet of air-conditioned cars. And the driver thinks that cleaning the air conditioner is just for beauty? Quot as long as you can't see the dust, you don't remember cleaning it. "In fact, this kind of cleaning is quite simple. Just remove the net cover from the car and rinse it with clear water. The whole process will not take more than ten minutes.
Mr. Huang, the vehicle management office of Shanghai Metro Operation Company, said that subway air conditioning is central air conditioning. During maintenance, the air outlet is cleaned every two weeks according to German standards, and the filter screen of air conditioner will be replaced regularly to ensure the health of subway passengers. Professor Wen Hai, director of dermatology department of Changzheng Hospital, pointed out that there are a lot of dust, mites and molds in air-conditioned buses and subways due to the large number of people. If it is not cleaned frequently, the air duct and blower of the air conditioner will become the habitat for the survival and reproduction of germs and viruses. When the air conditioner is turned on, these germs, viruses, molds, mites and so on. It's all blown out by the air conditioner, which is harmful to human body.
In places where office buildings are concentrated, "white-collar workers" suffering from allergic dermatitis account for a large proportion. This has a lot to do with the central air conditioning in the office building. There are many people in the office, and some office buildings are poorly ventilated, which provides an easy environment for mites and other germs to survive. Many white-collar workers stay in the office all day and even have lunch and lunch break, so they are naturally vulnerable to mites.
Professor Zhang Shengnian, director of the Shanghai Center for Disease Control and Prevention, pointed out that the central air conditioner widely used now is just an air temperature regulator, which can do nothing to improve air humidity, oxygen content and the existence of germs. This situation is difficult to change only by measures such as filtration and purification and negative ion generation.
The most effective way is to clean the air duct and fan of air conditioner in time and replace the fresh air and filter screen cover. But it is difficult for many users of central air conditioning. According to the doctor, mites are very small and it is difficult for people to find them with the naked eye. However, the toxins released by mite bites can cause human allergies, resulting in papules and erythema. If you scratch it with your hands, the skin will also cause infection and suppuration.
Professor Li Fang, director of the dermatology department of Huashan Hospital, said that sultry weather and high humidity are the best hotbeds for "cultivating" mites. Whether it is the low-power air conditioner at home, the air conditioner on taxis and buses, or the central air conditioner in office buildings, it has become a "blessed land" for mites to hide. Citizens who turn on air conditioners to cool down have further "close contact" with mites. When the skin appears like a red pimple bitten by a mosquito, it is very itchy, and this is what the mites are doing.
Professor Wen Tinghuan from the Institute of Medical Sciences of Shanghai Medical University warned the public: Don't underestimate these mites whose body length is less than1mm. If you are not careful, you will take advantage of it. For newborns and children, the pain and discomfort caused by mites may even accompany them for life. In order to eliminate mites at home, it is necessary to clean the air conditioner in time to reduce the harm of mites to the body. When it is used again in the second year, it must be disinfected.
Mite is the strongest allergen known in the world so far, and it is the chief culprit that causes allergic asthma (inhalation asthma), rhinitis (vasomotor rhinitis), eczema (atopic dermatitis or atopic dermatitis) and other pathological reactions. Mites are most likely to parasitize people's forehead and face, including nose, eyes, lips, forehead and scalp. , followed by nipples, chest, neck and other places. A small amount of parasitism often has no obvious symptoms, or slight itching or tingling, and the local skin slightly bulges into solid nodules with erythema, erythema and papules, which can last for several years. The adult infection rate is as high as 97.68%.
The secretion, feces, molting and corpse of mites are harmful to human body. These substances are decomposed into tiny particles, which fly in the air through people's walking, making beds and cleaning houses, especially through air conditioning, and are extremely strong allergens. People with allergic constitution will induce diseases after contact or inhalation, which are manifested as allergic rhinitis and allergic asthma in the respiratory tract; Dermatitis manifests itself on the skin. According to statistics, about 80% of citizens' allergic asthma, rhinitis and dermatitis are related to mites.
How to fundamentally eliminate mites? Remove the filter screen on the air conditioner at least once every 2-3 days, clean the dust on it and remove the attached mites. The multi-layer filter air conditioner also needs to be cleaned once a week. Choosing apatite antibacterial and deodorizing filter screen can absorb dust, mites, pollen, lice and mold, but it should be cleaned regularly. In addition to the cleaning of air-conditioning dust suction screen and filter screen, we should also pay attention to ventilation to keep the air fresh. Most of the doors and windows in air-conditioned rooms are closed, which makes the room lack of oxygen, bacteria multiply and mites breed. Therefore, air-conditioned rooms should always open windows for air. The startup time should not be too long. Generally, shut down after 1-3 hours, and then open the window for fresh air. Keep the room clean and reduce the pollution sources of diseases. People shouldn't blow cold air directly. White-collar workers who often sit in offices should stand up and exercise intermittently to promote blood circulation and enhance their resistance.
With the popularity of cars, the interior environment is becoming more and more worrying. It is reported that the air pollution, the number of bacteria and the smell inside the car are many times higher than those outside the car. Often these invisible and intangible things will make people who stay in the car for a long time feel dizzy and uncomfortable. Many people think this is a motion sickness phenomenon, but it is actually caused by a large number of harmful substances (such as bacteria, odor, etc.). ) in the air circulated by the air conditioner in the car. In summer, this phenomenon is more serious.
There are dozens of pathogenic microorganisms in the air inside the car, which attach to tiny dust, causing human respiratory system infection and endangering human health. Therefore, improving the air inside the car and improving the refrigeration efficiency of air conditioners are issues that every driver should pay attention to.
After the automobile air conditioner is used for a period of time, a lot of harmful substances such as dust, dirt, amine, alkali and virus will accumulate on the filter screen and radiator. Moreover, because the condensed water fills the scattered pieces of the filter screen, a large number of bacteria and viruses will be produced. With the circulation of hot and cold air in the car, these dirt will reduce the cooling and heating efficiency of air conditioners and increase fuel consumption, while bacteria and viruses will pollute the air, spread diseases and seriously endanger human physical and mental health. Therefore, the car air conditioner must be cleaned after a period of use. Only in this way can you have a high-quality, comfortable and fresh air environment.