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Why did the ancients use charcoal braziers for heating but were not poisoned by carbon monoxide?

In ancient times, people used charcoal braziers for heating without being poisoned by carbon monoxide. This is a very interesting question, because it will bring back memories of many people? Not to mention ancient times, that is, thirty or forty years ago, the northern fire kang There is a charcoal brazier in which children can burn peanuts, soybeans and corn kernels or even bury potatoes and sweet potatoes. The family gathers around the charcoal brazier. The men play poker and watch cards (a card game similar to mahjong), and the women eat The soles of the shoes are embroidered with door curtains, which is a joy to wear. Why did the ancients use charcoal braziers for heating, but they did not suffer from carbon monoxide poisoning? Why did the ancients use charcoal braziers for heating, but did not suffer from carbon monoxide poisoning?

Why are there no trees or grass in the courtyard of the Forbidden City? They are all afraid of sparrows flying into the palace. In ancient times, houses and palaces were ventilated from the north to the south. They were all tiled houses and halls, which were fully breathable. Like me in Nanchang City, the streets are small. Most of the houses in the lane in the 1950s have wooden brick walls from the Qing Dynasty and the early Republic of China. The walls are firewalls, all made of mud tiles, and glass tiles. The walls have windows open, and the moonlight shines brightly at night. When you raise your head and lower your head, it is your hometown! In a word, if the house is not blocked, the roof and bottom of the tiled house can be ventilated, and it is called flue gas. If there is one oxygen or two oxygen, if there is malnutrition, it is enough to have food and vegetables.

There is a theory that Cao Cao’s important counselor Xun Yu also died of carbon monoxide poisoning, and Emperor Guangxu’s teacher Weng Tonghe was also poisoned twice by carbon monoxide, and by the Qing Dynasty, people already knew to use white radish soup. Come to relieve carbon monoxide poisoning. Once, a female official in the palace was poisoned by carbon monoxide. Empress Dowager Cixi ordered someone to help her outside, and then let her drink white radish soup to detoxify.

The Qing Dynasty used more hand stoves, with much less charcoal, and much less carbon monoxide poisoning. It was not how smart they were, but their habits that saved them. Today, with advanced science and technology, almost everyone is aware of the dangers of carbon monoxide poisoning. I hope that such tragedies will happen less often or even never in the future.

Carbon monoxide poisoning was very common in ancient times. You can tell by reading ancient medical books.

The Ming Dynasty's "Jingyue Complete Book" said that the ground in the capital was cold, the rooms were tightly covered with paper, and people slept on fire beds, and the coals made the room hot. But the one whose house is the smallest and most dense is the most harmful to others. What's the reason? If the lid is water-based and flows down, but does not leak down, then it will be full from the bottom up; if the fire-type inflammation is on the top, but does not leak up, then it will be full from the top and go down. Therefore, when people are poisoned by coal, it usually happens after midnight. The gas gradually fills up and reaches the nose of the person, causing the person to stop breathing and die without knowing it. This is a pity. Anyone who wants to avoid its poison should only look at the most intimate place in the room, which is extremely worrying. However, if you leave a hole in the top grid or open several ridges on the window paper, then the air will naturally escape and cannot be filled up, so there is no need to worry about it. However, the window gap is not as good as the top core because of the speed of ventilation. If a person is poisoned, he will hold his breath and struggle, unable to wake up on his own. Call him immediately and drink cold water, and he will be rescued immediately. Or he can be rescued by quickly ordering his servant to breathe in the air from the ground. However, if we wait for emergency treatment and seek treatment, it may be delayed and to no avail. If there is any precaution, it can be cured. The harm caused by water and fire in the capital city can be compared to other places. Any official who travels to the capital or is in a foreign place must not know these two theories, as they are the foundation of self-preservation. ?