Tuesday, June 23, 2020

Air conditioning room should be alert to water shortage

After entering the summer, almost every household turned on the air conditioner, and the temperature dropped, but the body's skin was abnormally "thirsty", which led to a series of air conditioning diseases.

Refrigeration is inseparable from the most water shortage in the dehumidifying air-conditioned room

In midsummer, everyone knows that a lot of sweating causes the body to lose water. But in the air-conditioned room, you can enjoy the comfort of low temperature comfortably, the human body will also lose water. The reason should start with the refrigeration principle of the air conditioner.

The cooling principle of an air conditioner is similar to that of a refrigerator. There is a refrigerant in the air conditioner. After the air conditioner is turned on, the compressor inside compresses the refrigerant into a high-temperature and high-pressure vapor, which is transported to the condenser behind the air-conditioning box, where it is condensed into a high-pressure liquid, and then sent to the front part of the air-conditioning box. Inside the evaporator. At this time, the air in the room is sucked in by the centrifugal fan and passes through the evaporator. The refrigerant slowly evaporates from the liquid to the gas to absorb heat, reducing the temperature of the air in the room to cool air, and then blows from the air outlet through the air duct. In the room, the cycle is repeated to achieve the purpose of cooling.

Why does the air conditioner dry? It turns out that the air conditioner can remove some water from the air during the cooling process, because the temperature of the indoor air drops greatly after entering the air conditioner evaporator, and its relative humidity will enter a supersaturated state. At this time, a large amount of dew will condense on the evaporator fins. The refrigeration terminology is "condensation". Therefore, the cooling process is accompanied by dehumidification. Li Jianguo, director of the Department of Respiratory Medicine, Zhongshan Second Hospital, said that because of the dehumidification function of the air conditioner, the indoor air humidity is much lower than the normal value. The dry air takes away human body moisture. If you stay in the air-conditioned room for a long time, you will be prone to thirst and dry skin. , Dryness of the corners of the lips, discomfort such as molting, all of which suggest that your body has lost water.

Short-term water loss will not immediately cause symptoms on the body, but in the summer, the air conditioning of many families is "busy day and night." Li Jianguo reminded that if you stay in the air-conditioned and dry environment for a long time, you will easily get "air-conditioning disease" if you are not careful.

If the human body loses water, and if it is not replenished in time, the respiratory tract will also lack water, which is easy to cause upper respiratory tract infections. The humidity in the room is too low, which will reduce the ability of the body's immune system to defend. Some studies have shown that when the air humidity is less than 40% The ciliary movement on the mucous membranes of the respiratory tract of the nose and lungs is slowed down. Dust, bacteria, etc. tend to adhere to the mucous membranes, stimulate the throat to cause cough, and other diseases of the respiratory tract are also prone to occur. In addition, when the air humidity is low, influenza viruses and energy can The growth rate of Gram-positive bacteria that cause infections is accelerated. In addition, the air-conditioning environment is closed, and bacteria and viruses can easily survive in the air, becoming "foreign enemies" lurking around the human body.

Western medicine teaches you: also need to replenish water while indoors

Drink plenty of water when blowing air conditioners. According to relevant statistics, the average daily water consumption of normal people is 2000-2500 ml. In addition to the 300 ml of water generated by the oxidation of substances in our body, the other 2200 ml must be replenished from the outside. In summer, the water is volatile, and the daily water supplement should be about 3000 ml. Especially in the air-conditioned room, there is a lot of water loss. You should drink water in time. Drinking water does not have to wait until you are thirsty, you need to supplement regularly. In particular, pay attention to the fact that many families blow the air conditioner overnight, get up in the morning and lose body water, and may have some dehydration. It is best to drink a large glass of water to relieve it.

The skin also needs hydration. If you work under air conditioner for a long time, please equip with moisturizing skin care products, evenly apply to the face, neck and limbs, so that the skin can better resist "drought". In addition, you can use a hydrating spray to evenly spray moisture on the face and limbs.

When using air conditioning, the water supply of the room is also very important. Ms. Yang, a technician of an air-conditioning counter in an electrical city, said that using air conditioners cannot be blindly cool, because the lower the temperature, the lower the humidity of the air. Under such circumstances, people will lose water more seriously. Generally speaking, the temperature of the air conditioner for household use is more suitable at 24℃-26℃.

While controlling the temperature, a pot of water should be placed indoors, using natural water evaporation to increase the indoor humidity. Miss Yang said that the problem of how much to put is not very big, the most important thing is the mouth of the container, that is, the larger the surface in contact with the air, the better, because it can enhance evaporation. In addition, watering and wiping the floor with a damp cloth can increase indoor humidity. If it feels dry, especially for some chronic patients, infants, children and the elderly, a humidifier can be installed at the end.

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