When you encounter the new crown virus in summer, please keep this air-conditioning instruction

When you encounter the new crown virus in summer, please keep this air-conditioning instruction

As the weather gets hotter, it seems that the day to turn on the air conditioner and eat watermelon has arrived. But now that the epidemic prevention and control cannot be relaxed, can the air conditioner be turned on? What are the risks of “air-conditioning disease" that may be faced by staying in an air-conditioned room for a long time? This summer, how to cool down the heat in a healthy and scientific way?

　　Master the correct opening "posture"

　　 Shopping malls, office buildings, hospitals, large hotels and other places often use central air conditioning, and the use of central air conditioning in a confined space may lead to the spread of the new crown virus.

　　 This is by no means alarmist. During the SARS period, a hospital had a mass infection caused by the use of central air-conditioning. In April of this year, an article published in "Emerging Infectious Diseases" also touched on this issue. In a restaurant with central air-conditioning, a total of 10 people in three families, A, B, and C, ate dinner. As a result, every family appeared. Infected.

　　 On February 12, relevant state departments issued the "Guidelines for the Operation and Management of Air Conditioning and Ventilation Systems in Offices and Public Places During the New Coronary Pneumonia Epidemic" to guide the safe and reasonable use of air-conditioning and ventilation systems in office and public places to prevent the spread and spread of the epidemic.

On May 6, at the press conference on the prevention and control of the new type of coronavirus pneumonia in Beijing, Liu Xiaofeng, deputy director of the Beijing Centers for Disease Control and Prevention, gave advice-for central air conditioning, the most important thing is to keep the fresh air running. , And close the return air system. Some air conditioners come with air purification and disinfection devices. This kind of air conditioning system must be operated in strict accordance with the product instructions.

　　 Compared with central air conditioners, is there any risk to household air conditioners? In Liu Xiaofeng's view, the most common air conditioner in daily life is a split air conditioner, which means one room and one machine. When this type of air conditioner is used, the air circulates in a separate room through the air conditioner, and there is no cross-contamination of each room, so it is basically safe.

Professor Zhang Xu, director of the Institute of HVAC of Tongji University, also holds a similar view. He believes that the household split air conditioner is an indoor unit. As long as there is no virus in the home, the air will only circulate in the home and then pass through the pressure difference between indoor and outdoor wind. Let outdoor air enter the house. Except for the close proximity to the hospital, generally speaking, the outdoor ambient air around us is clean air. And clean air not only does not spread the virus, but is good for health.

　　 Home air conditioners are relatively safe, which makes many people breathe a sigh of relief. "However, it is worth noting that household air conditioners are often used only during the summer. Long-term idleness causes a large number of bacteria to grow inside the air conditioner. Therefore, regardless of whether the epidemic situation is considered, the filter and movement should be checked before reusing the air conditioner. Cleaning and disinfection." Zhao Hongbo, deputy chief physician of the Chinese Medicine Rehabilitation Center of Beijing Rehabilitation Hospital, Capital Medical University, told a reporter from Science and Technology Daily.

　　 Cool air invades the body to be alert to "air conditioning disease"

　　 Turn on the air conditioner to enjoy the coolness. In addition to concerns about viruses and bacteria, it is actually more important to pay attention to the fact that staying in the air-conditioned room for a long time can easily cause a variety of "air-conditioning diseases."

　　 Zhao Hongbo explained the concept of "air conditioning disease". There is no such disease as "air-conditioning disease" in medicine. This is a sociologically diagnosed disease name, which is more like a conventional term. It usually refers to a disease related to or caused by air-conditioning.

"The most common'air-conditioning disease' is a cold. The outdoor temperature is high. Once you enter the air-conditioned room, your body will catch cold, and you will have symptoms such as sneezing, coughing, fever and headache." Zhao Hongbo said that some people are prone to digestion. Discomfort symptoms such as stomach pain, diarrhea, nausea, vomiting, and even anorexia may also occur.

He pointed out that for people with "yang deficiency" who are older and weaker, if they usually have basic diseases such as neck, waist, and joints, they are likely to cause the original cervical spondylosis to relapse or worsen after being exposed to cold or wind. , Waist and leg joint pain, muscle aches, etc.

"People with low immunity, if they often stay up all night and work under high pressure, will easily cause neurological diseases after being exposed to cold wind, such as facial neuritis, leading to crooked mouth and eyes, etc." Zhao Hongbo said, for women, after cold waist and abdomen, It is easy to cause uncomfortable symptoms such as irregular menstruation and dysmenorrhea; for people with allergies, skin diseases such as rash and allergic dermatitis may occur after air conditioning.

　　 People with cardiovascular and cerebrovascular diseases and the elderly should pay more attention to diseases caused by air conditioning. Zhao Hongbo said that the hot weather in summer will make the internal blood vessels of the human body in a relatively relaxed state. If you enter the low temperature environment of an air-conditioned room from a high temperature environment, the blood vessels in the body will naturally shrink. The quality of blood vessels in the elderly and those with cardiovascular and cerebrovascular diseases such as hyperglycemia and hypertension is not high, and the elasticity of blood vessels is not as good as that of normal people. Diseases such as cerebral hemorrhage may be life-threatening in severe cases.

　　 I should sweat more in summer

　　 Many scholars have pointed out that the best way to avoid "air conditioning disease" is to prevent it, that is, to use air conditioning rationally.

"During the epidemic prevention period, it is not recommended to use the air conditioner continuously day and night. It is necessary to open the windows for ventilation. Put safety first." Zhang Shunan, director of the Department of TCM Pulmonary Diseases, China-Japan Friendship Hospital, told a reporter from Science and Technology Daily that even in normal times, he does not advocate Use air conditioning for a long time. The reason is that if people want to maintain a healthy body, they should conform to the natural four o'clock law, in the hope that heaven and man will respond.

"For example, you should sweat in summer." Zhang Shunan said that sweating is a normal physiological function of the human body, and it is a requirement and embodiment of the human body to maintain health. The large-scale promotion of air-conditioning has caused many people to lose their sweating function. Causes adverse effects on the body.

　　 Zhao Hongbo also holds the same view, and can reduce the frequency of air conditioning by appropriately increasing outdoor activities and opening windows for ventilation. “Opening the window for ventilation should be no less than once a day, preferably not less than half an hour each time. Especially during the epidemic prevention period, opening the window for ventilation is particularly important." Zhao Hongbo said.

Professor Zhang Wenhong, director of the Department of Infectious Diseases at Huashan Hospital affiliated to Fudan University, reminded the public that although the probability of infection caused by air conditioning is extremely low, because one of the characteristics of central air conditioning is the closed type, in case an individual patient becomes infected, A confined space will pose a greater risk to everyone. Therefore, it is not recommended that schools use central air conditioning.

　　Never use alcohol to clean and disinfect

　　Of course, the air conditioner was born to make people live more comfortably. How to use air conditioning scientifically to minimize its harm to human health?

　　 Zhao Hongbo suggested that the temperature of household air conditioners should not be too low. Taking into account that the human body should be able to adapt to the temperature difference between indoor and outdoor more easily, it is generally recommended that the set temperature of the air conditioner should not be lower than 26℃. Those who stay in the air-conditioned room for a long time due to work or other reasons should ensure that they have a certain amount of time for outdoor activities every day. It is hot in summer. After activities and sweating, you should replenish water, sodium, potassium and other elements in time. You can drink light salt water or fruits such as bananas and oranges to maintain electrolyte balance and intake of essential life elements.

　　There are also experts’ suggestions that don’t let the cold wind from the vents blow directly on your body. It is best not to blow the cold wind directly when you are sweating. Pay attention to the warmth of the cervical spine and knee joints. If local discomfort occurs, apply heat to the cold part to reduce the symptoms of discomfort.

"We should also pay attention to regular disinfection and cleaning of air conditioners, especially in the special times of the moment." Zhao Hongbo said that if you don't want to find "air conditioners", the most important thing is to use less air conditioners and set air conditioner parameters and cleaning and disinfection reasonably. .

　　Experts especially emphasize that in summer, do not use alcohol to clean the inside of the air conditioner. Medical alcohol can be disinfected and sterilized, but it evaporates quickly. Using alcohol to clean the air conditioner will easily form flammable and explosive gas due to poor air circulation inside the air conditioner, posing safety risks.