When the air is turned on, should we open or close the window? Expert answers may surprise you

When the air is turned on, should we open the window or close it? In the past, we thought it was normal and believed that the doors and windows should be closed as soon as the air was opened, so that the cold room was effective and energy-saving. But recently, some experts have pointed out that it is right to open the air and open the windows. Not opening the windows for a long time may make people stay in the "dirty air" filled with carbon dioxide.

The outdoor space is serious. Can the doors and windows be closed to keep the indoor air "fresh"? Indoor emptying actually threatens health. We ask experts to share how to reduce indoor emptying.

Close the door and window before opening the air to avoid the air leakage. But recently, some experts have pointed out that not opening the windows for a long time may make people stay in a carbon dioxide-filled environment. The Hualien County Environmental Protection Bureau stated that the air conditioner of the air is a circulation within the machine and does not have an additional gas exchange function. It is recommended to open the door and windows about 4 to 10 cm, and add a circulation fan to maintain the air circulation in the indoor air.

The indoor carbon dioxide concentration is too high, and human hypoxia is not good for health.

Hong Qiuqi, director of the Air Noise Prevention and Control Section of the Environmental Protection Bureau, said that the causes of indoor air dyeing, including outdoor air dyeing sources, indoor combustion sources, building materials, paint and waste materials, office machines, cleaning products and human breathing. If they cannot be discharged in a closed space, it will cause harm to the human body.

Most people believe that when the air is turned on, there will naturally be fresh air circulation. In fact, the air is circulating between indoor machines and outdoor machines through refrigerant, and does not have an additional gas conversion function. Unless the door window is opened, the fresh air circulation will gradually accumulate, otherwise the indoor dye source and carbon dioxide concentration will gradually accumulate. In an environment with poor ventilation, the oxygen level is insufficient, and the human body is prone to lack of oxygen.

When the carbon dioxide concentration in indoor air is too high, it will cause health effects such as increased heartbeat, head, loss of direction, visual distortion, difficulty breathing, distracted heartbeat, vomiting, trance, loss of hearing, loss of consciousness, etc.

It is not suitable for the windows of the home, and an air purifier or a circulation fan can be used to assist in the flow.

In order to reduce the concentration of carbon dioxide, Hong Qiuqi pointed out that when the air is cool indoors, it is recommended to open the doors and windows about 4 to 10 cm to maintain indoor air circulation. Only by entering the indoor air can the carbon dioxide concentration in the closed space be effectively reduced.

At the same time, air purifier and circulating fan are also important. Since the heat air rises and the cooling air drops, it is recommended to place the air purifier or circulator fan under the cooling outlet on the same side as the cooling air, or at the longest opposite angle in the room to allow circulation. The fan's wind blows towards the center of the room and is released at an elevation angle, allowing the fan leaf to sweep into the cold air and dissipate the hot air, bringing the wind to the corner of the room. This repeatedly circulates to promote convection and reduces temperature, which can quickly adjust the uneven temperature in the room and reduce energy consumption of the cold air.

However, Su Yanqian, a professor in the Department of Natural Resources and Environment at East China University, reminded that whether the window is suitable for your home is suitable for opening the window depends on the environment where you live. If it is near Dama Road or there is a construction site nearby, it may not be suitable for window opening; at this time, you can use an air purifier, cooling air with a circulation fan to help the indoor air circulation. Remember to change or clean regularly.

The air-conditioning filter web masks, which are dirty and blocked, will affect the cold room, and therefore consume more electricity.

In addition, cleaning of air-conditioning filters is also very important. Hong Qiuqi said that filters are like masks, helping filters to filter the dirt in the air. If the "mask" is blocked by dirt, the "gas absorption" of the air will decrease, affecting the capacity of the cold room; and the capacity of the cold room will decrease, and the compressor will take more time to reduce the room temperature, which will consume more electricity.

Hong Qiuqi pointed out that since the cold air inhales hot air and then blows out the cold air, the dust bacteria in the air will get stuck on the filter network and outlet. After the accumulation of dirtyness on the filter network, it will affect the effect of the cold room and consume electricity. Therefore, the filter network must be cleaned properly. In addition to fixed cleaning filter network, if the ash accumulation of the air cooler machine is too large, the efficiency will be poor, and the heat transmission efficiency of the air cooler will be poor, which requires high-speed transportation. The outdoor machine is too dirty, so it will be difficult to dissipate heat, and will continue to operate due to the inability to detect the temperature drop, which will consume a lot of electricity in the long run.

Setting the air to close in the middle of the night. The closed doors and windows affects health.

Some people are habitually setting the air to close in the middle of the night, but under the closed doors and windows, it is not good for health. Hong Qiuqi said that in closed buildings, if the indoor air volume is insufficient, the pollutants are prone to accumulate, resulting in the indoor air quality being malignant. In 1982, the World Health Organization (WHO) defined the "Bacterial Building Syndrome" as "an abnormal human symptoms caused by air pollution in buildings, such as neurotoxic symptoms (including irritation in the eyes, nose, throat, etc.), bad smell, asthma, etc.".

Indoor air quality is particularly important for children, pregnant women, the elderly and chronic patients who often stay indoors, especially when children are growing up, the proportion of breathing volume and weight is 50% higher than that of adults. In addition, children live indoors more than 80% of the time, so children are more susceptible to indoor air pollution than adults. The WHO research report pointed out that 100,000 people die of asthma every year due to indoor air pollution, 35% of whom are children.

If you are worried about the high concentration of carbon dioxide in the ventricular, Hong Qiuqi recommends that you can purchase a detector that detects carbon dioxide and has a warning function to know the concentration of carbon dioxide at any time. The alarm function can also remind you to take measures such as opening windows to open wind to maintain health.

Responsible editor: Gu Zihuan