Hearing Li Shimin ask about business, Li Mu also cheered up and led Li Shimin to the anvil to show off the heating coal stove he had taken the time to build in the past few days. This heating coal stove did not come from the system. After all, he brought the system
It is a game system. The characters in the game do not need heating, so naturally there is no heating coal stove. This heating coal stove was built by Li Mu based on his past life memories. When he was a child, the orphanage had no heating, so he used it for heating in winter.
Coal stove.
When it snows, the children will gather in a room, because the orphanage has limited funds and cannot buy much coal. At this time, the old director will also live with the children, because he is worried that if he does not watch
However, children filling the coal by themselves will cause problems. The cost of coal is rationed every day. Use a scale to weigh it. How many kilograms per day cannot be exceeded. If it is exceeded, the amount of coal will not melt before the snow melts next spring.
There is no more coal in the orphanage.
And more importantly, he was worried that his children would be poisoned by gas if they filled the coal by themselves.
But in fact, the probability of danger from coal heating stoves is very low. Basically, if an adult pays a little attention, there will be no problems. In the 1980s and 1990s, when buildings were not yet popular, heating coal stoves
Stoves are a must-have for northern families.
This thing is very simple to make. You don’t need very good steel, just the lowest cast iron. With the iron smelting technology of the Tang Dynasty, it is not difficult to make. As early as the Qin and Han Dynasties, when making bronzes, the Central Plains people had already
After mastering the process of making bronze ware from molds, I can make a coal heating stove. This process is just perfect. I just need to replace the bronze with iron. It is very simple.
Li Mu found several bronze craftsmen at the Ministry of Industry, drew drawings for them, and asked them to bake the mold. The furnace he is now showing Li Shimin was cast using this mold.
He made the furnace tube above the stove himself. After connecting them together and sealing the gaps with mud, a standard coal-fired heating stove from the 1980s was completed.
Li Mu was very satisfied with his craftsmanship. He was very confident that this cast iron coal stove was much better than the stove he used to heat rice when he was in elementary school. But obviously, Li Shimin didn't know how to appreciate it. He looked at it for a long time.
Really missing the point, he pointed at the coal stove and asked, "What is this for?"
"Does your Majesty know about coal and stone?"
Li Shimin nodded and said: "Of course you know that although coal and stone can be burned, it must be ventilated, otherwise poisonous smoke will be emitted. Therefore, it cannot be used for heating, and can only be used for making iron... What are you doing with this?"
"Your Majesty, with this thing, the problem of poisonous smoke can be solved." Li Mu said seriously: "Winter is approaching, and it will almost snow in a month. I asked the doctor of Yubu, and he told me that this coal stone
They are everywhere. If this is true, doesn’t it mean that our Tang Dynasty has endless fuel? If the people had such furnaces, would they freeze to death in winter?"
After Li Shimin listened to Li Mu's words, the first thought that came to his mind was 'A Arabian Nights'. From ancient times to the present, no one knows that coal is poisonous. If he is not really poor and cannot afford charcoal or firewood, who would take the risk?
How about using this thing for heating? Everyone knows that coal and stone are flammable, but since the Qin and Han Dynasties, few people have used it. Doesn’t this explain the problem?
And now Li Mu has built a weird "stove" and claims to have solved the problem. How can Li Shimin believe it?
Li Mu noticed it, and before Li Shimin could speak, he took the initiative and said: "If your Majesty doesn't believe it, I will demonstrate it to you now."
With that said, without waiting for Li Shimin to agree, Li Mu called Li Chongyi to bring the coal. Li Chongyi heard Li Mu's order and went to the warehouse to bring a large basket of coal. It weighed several hundred kilograms, but in his hands, it seemed like he was carrying
As easy as a chicken.
The basket was put down heavily, and Li Mu threw the coals in one piece at a time. Then he used dry branches from under the furnace to light a fire. The coals kept by the Ministry of Works for iron-making were all good coals. They ignited when they encountered fire, and the fire quickly grew. Then the fire started.
What came was the choking coal smoke. Although Li Shimin did not run away, he raised his hands to cover his mouth and nose with his sleeves and said: "Li Mu, look at the smoke, this is coal poison, do you want to poison me?"
"
"Your Majesty, wait a moment!" Li Mu cursed in his heart, why was he so unlucky to catch up with the windy weather? He quickly brought the bamboo fan over and asked Li Chongyi to fan him.
Anyone who has ever built a stove knows that even on a windy day, as long as the combustion is stable and the fire becomes red, and the heat rises, the wind can be carried away, and the smoke will only last for a while. But there was a lot of coal today, and after about an hour
When you burn incense, the coal becomes red and the smoke stops.
Li Shimin has been holding back. It's not that he is not afraid of life and death, but that Li Mu hasn't left. He wants to see what Li Mu is going to do. He saw the changes in the fire with his own eyes, and felt the most vividly. He didn't expect that Li Mu's stove
It really worked. Although it was choked at the beginning, he also knew that it was related to the wind direction. Even if it was not the stove, there would be times when marching to bury pots and cook rice, and there would be times when the wind was blowing, so this was not a problem.
When the smoke dissipated, Li Shimin put down the hand covering his mouth and nose, got closer and smelled it. He no longer smelled the pungent smell. He followed Li Mu's example, took the stove hook in his hand and lifted the lid.
When I turned on the stove, I saw that all the smoke produced in the stove went out along the iron cylinder above the stove. I couldn't help but be very surprised and said: "Ai Qing, can you actually control smoke?"
Li Mu cursed in his heart, Boss, you are really realistic enough. You usually call me by name, but when you are angry, you call me kid. Now when you see something is ready, Aiqing comes. The difference in treatment is really obvious.
Li Mu quickly made a grateful expression and said: "Your Majesty, it's not that I can control the smoke, but that I discovered the reason why the smoke rises, so I made a stove to guide the smoke out. Now that your Majesty has seen it with your own eyes, you can feel that
Can I use your invention?"
Li Shimin pondered for a moment, then shook his head and said: "This stove is usable, but it is not practical for the common people. Li Mu, have you ever thought about how much this stove costs? Our Tang Dynasty is short of iron.
A stove like yours may cost hundreds of kilograms of iron. Hundreds of kilograms of iron may not be a problem for princes and nobles, but for the common people, they simply cannot afford it."
Li Mu had already thought of it and said: "Your Majesty is wise enough to see through the disadvantages of this coal heating stove at a glance. Yes, the cost is the biggest obstacle to the implementation of this coal heating stove. I thought about it for a long time and finally thought of the second idea.
Find a way."
After Li Mu finished speaking, he took Li Shimin to the next door, which was the room where he usually took a nap when he was tired from working in the studio. This room had already built a fire wall, which he had asked Yu Wengui to send someone to repair a few days ago.
"Your Majesty, please see, this is another method that I have thought of. Your Majesty has just seen that the reason why the heating coal stove can avoid poisoning is because it leads the smoke away. The most important thing about using coal is this
To lead out the smoke." Li Mu walked to the wall, stretched out his hand to touch the wall, and said, "This wall is a double-layered wall, hollow. When I burn coal here, the smoke can pass through the hollow wall and then be led out.
I asked the craftsmen to make cylinder tiles similar to the iron cylinders your Majesty saw just now. Connecting these tiles together and sealing them with mud can have the same effect. You can keep warm without using iron."
Li Shimin took a closer look. He had just seen Li Mu's demonstration. Looking at the fire wall again, it was almost understandable. However, when it came to important matters involving people's livelihood, there was no room for sloppiness. Li Shimin still asked Li Mu to demonstrate in front of him.
Li Mu had no choice but to ask Li Chongyi to fetch the coal, put it into the brick stove, and then ignited it. Sure enough, as Li Mu said, the smoke was directed out and the entire wall was heated.
Li Shimin finally showed a satisfied expression and laughed: "If Ai Qing is talented, this wall of fire is not difficult to build. The people can build it themselves, and coal and stone are everywhere. It seems that the people of the Tang Dynasty will not have to suffer from the cold in the future."
Yes, hahaha..."
"And." Li Mu interrupted Li Shimin's laughter, making him almost choke on his own saliva. Li Shimin glared at him displeased and said, "What else?"
"Your Majesty, please sit down." Li Mu gestured, and Li Shimin noticed that there was a step about knee high behind them. He followed Li Mu's example and sat on it. He felt the heat under his buttocks, and couldn't help asking: "What's this again?"
what?"
"Your Majesty, this is a pan-kang, and it is also my invention."
"Pan Kang?" Li Shimin frowned and said, "I have only heard that there is a Kang in the north, but what is a Pan Kang? Is there any difference?"
The kang is not an invention of the Goguryeo people. The prototype of the kang already existed in the Western Han Dynasty in my country. However, the kang at that time was still very simple. It used a stone slab as a cover, dug a hole underneath, heated the stone slab, and waited for the slab to cool down. At that time, it was not very practical to lie down on it to sleep. Later it was gradually abandoned. When it comes to 'Kang' in the world, the technology of the Goguryeo people is still the best.
"New Tang Book Goguryeo Biography" records: "In the winter months, a long kang was built, with a warm fire burning underneath." The kang in Mayi, Li Mu's hometown, was also a technology passed down from the Goguryeo craftsmen who were captured when Emperor Yang of the Sui Dynasty conquered Goguryeo. Generally speaking,
The structure is similar to that of later generations, but the smoke mouth is flat, that is to say, it burns here and smokes out there. The smoke stays in the kang for a short time and cools quickly.
The Kang made by Li Mu was a flowerbed Kang built in the era he lived in later generations. He had already summed up the experience of his predecessors and built a flowerbed Kang. He really wanted to make a hollow Kang in one step, but he had no choice but to make it without cement.
In order to build a high-strength and large-area Kang board, you can only use bricks to build a flowerbed Kang. There is a flue in the middle of the flowerbed Kang. When smoke comes out of the stove, it has to coil around the flowerbed Kang for more than ten times before it can be smoothly dispersed.
The road coils around, and the smoke also coils around, so it is called Pan Kang.
It would take at least eight hundred years for Goguryeo's Kang to evolve to the level of a flowerbed Kang at that time. Li Mu's introduction of the flowerbed Kang at this time was definitely an invention several generations ahead of schedule.
Li Shimin saw the doorway. Li Mu had connected the fire wall to the inside of the Kang. The smoke from the fire wall had to go out of the Kang to really disperse. He admired his ingenuity in his heart. He was able to kill two birds with one stone.
Coal and stone were used for dual purposes. The fire wall and the Kang made the temperature in the room immediately rise.