In the kitchen of Duke of Zhu Guofu, in a certain compartment, Wu Ming, who played the role of a chef in charge, put on a thick linen burqa, a trouser and an iron mask, and a "goggles" made of pig skin and glazed glass.??

The two people around him were dressed up like this. After getting ready, they carried a pot on the biogas stove. The soup, ingredients and ingredients were already placed in the pot.

The application of biogas in the Mansion has been going on for several years. Not only does biogas lamp lighting, but also cook vegetables and cooking in the biogas stove. Of course, it is not enough to burn biogas every day. Many times, firewood is also necessary. After all, there is no large amount of biogas.

"Put it carefully and check the exhaust valve and float valve!"

"The inspection is over, everything is normal!"

"Ignite, twist the air valve, and start timing!"

The biogas sprayed from the biogas stove was lit by the candles that were ignited first, and the metal pot placed on the stove was baked. This pot is different from the ordinary pot and looks more like a urn. The body and lid of the pot are made of fine iron, which is a magical tool in the kitchen of Duke of Zhuguo’s Mansion.

It has a formal name called "pressure cooker".

The pressure cooker is also called the "pressure cooker". It can heat the steamed food to more than 100 degrees. It was announced in the 17th century. With its unique high temperature and high pressure function, it greatly shortens the cooking time.

The benefits are more than that. The food cooked in a pressure cooker has a good taste, especially meat that is not easy to cook, which tastes surprisingly good.

Yuwen Wen's high-pressure technology tree has been around for nearly seven years, and finally a practical pressure cooker has appeared. The structure is similar to that used by later household pressure cookers, but the key components are substitutes.

The pressure cooker needs a sealing ring. Because there is no rubber, Eucommia ulmoides are used. However, the durability of the simple Eucommia ulmoides sealing ring is still a little poor, so the final sealing ring is made of pure copper and Eucommia ulmoides.

The pot body, lid, and the pot made of hydraulic pressing are polished by hydraulic lathes and finally processed manually. It took a lot of effort to make the finished product, exhaust valve, float valve and other things that should be available.

Although it is a low-level copycat pressure cooker, its cooking effect is already extremely sharp. No kitchen utensils in this era can produce the cooking effect of a pressure cooker.

What is "high pressure"? Except for Yuwen Wen and a few workshop craftsmen, no one knows what this means, but knowing that the dishes cooked from this thing are delicious, of course there is another problem, that is, they are very dangerous.

The pressure cooker can "fry the pot" and it will explode when used in the kitchen for the first time. The iron pot lid directly penetrates the roof and falls into the yard to make a shallow pit. The kitchen is in a mess, and the hot soup sprays all over the floor.

Fortunately, the protection was properly done at that time, several people present were only slightly scalded and scratched, but they were scared for a long time before they could speak.

It is dangerous, too dangerous. Not to mention the sudden sound, it scared the young men in the backyard in the distance. Originally, the mistress was unwilling to use this thing in the mansion, but the man insisted on using it.

After many troubles, the pressure cooker has been improved a lot. The fryer situation has become less and less, and there are more cooks who can use it and dare to use it. With the advancement of high-pressure cooking technology, the food level in the Duke of Zhu Guo’s mansion has reached a new level.

The food made from the pressure cooker tastes very good, the meat is "pressed" and it tastes soft and delicious. The pork rib soup made is also extremely delicious, and various new dishes are emerging one after another.

It’s just that the danger is too high and the cost is expensive, so it cannot be put into use in Wuweizhai.

"Time is coming soon!"

A whisper attracted Wu Ming's attention to the pressure cooker in front of the barbed wire. In order to prevent the fried pot lid from hurting people, they specially pulled a barbed wire mesh to block the face, and the thick cloth robe and mask on their bodies could prevent the hot soup from burning themselves.

The exhaust valve on the top of the pressure cooker suddenly roared and water vapor was sprayed out. Wu Ming took out his pocket watch and started timing. According to the "operation procedures", the pressure cooker started spraying water vapor and then turned off the fire for another half an hour.

It's okay if you don't turn it off, just wait and fry it!

Time passed by minute by minute. Wu Min and others looked at the pressure cooker with water vapor, and cold sweat gradually emerged, and each took out a wooden board to block it.

They didn't know if the pressure cooker in front of them would fry the pot, and they couldn't hide outside the house. They could only watch the pocket watch clock. After finally getting enough time, Wu Ming quickly closed the valve of the biogas pipeline.

"Okay, go out and wait, wait until you can't spray the steam, and then boil the pot later."

The servant beside him who had been trying to help him for the first time asked, "Why is this? Isn't it cooked?"

"It's cooked, but at this time there is too much water vapor in the pot, and it's difficult to open the lid. Even if you are as powerful as a cow, you will fry the pot with a "bang". If your life is not good, half of your head will be broken by the lid!"

Wu Ming said half-truely, making the other party look naughty, but he then added: "Don't be afraid, just follow the 'operating procedures' and ensure that you must be fully finished."

"really?"

"Take it seriously, there will be dishes made from pressure cookers in the kitchen. Don't be so delicious that you bite your tongue!"

While talking, the pressure cooker in the room was gone. Wu Ming looked at the pocket watch and confirmed that the time had come. He then led someone in and lifted the pressure cooker out and handed it over to the cook for treatment.

The lid of the pot was opened and the aroma was filled with fragrance. This time, the "pressure cooker braised lamb" was made for the mistress and the family. The next step was to be handled by the chef, and then the five pressure cookers pushed by a cart were filled with the delicacies serving the kitchen.

There are more than one biogas stove in Duke of Zhu’s mansion, and more than one pressure cooker.

"Continue to start work! Put the pot on the biogas stove, carefully and follow the 'operating procedures'!"

......

On the outskirts of Xiyang City, a workshop on the banks of Santai River, in one of the small courtyards, Lin Youdi, who was protected by his body, led the craftsmen who were also protected by his body to start a new round of experiments.

There was a device in front of them, like an enlarged pressure cooker, but there were many pipes and accessories outside, the most conspicuous one was the stove under the pressure cooker, and the round dial on the pot body - the air pressure gauge.

The fire was strong, and the large pressure cooker on it was burning out bursts of heat. Lin Youdi looked at the pressure gauge on the pot body, and the pointer inside began to move. He looked at the pocket watch in his hand, and then looked at the water level gauge of the large pressure cooker.

"The water level is low, add water!"

"Add water!, repeat, add water!"

The craftsmen next to them were working step by step, adding water and burning the fire in an orderly manner. The pipes outside the large pressure cooker were curved and finally connected to a lathe through many devices.

The lathe was originally driven by hydraulic power, but this time it was modified to test the new device. A new power was used to drive the drill bit of the lathe to drill harder metal products, such as fine iron rods.

Looking at the complete set of devices in front of him, Lin Youdi touched the scars on his neck and remembered the unbearable past.

A year ago, there was a larger device in this yard called a boiler, the size of an attic, and it took more than a dozen people to serve. According to the original design, this thing has a great "power" and can drive iron wheels weighing hundreds of pounds.

The scale-scale model model, full-size model, principle verification machine, and then the experimental type. It took a total of five years to make this experimental boiler.

The fire was ignited smoothly, and everything was normal. Then there was air leaking everywhere. Before everyone could react, the big explosion swallowed everything. The hot boiler water burned five people to death on the spot. Five people died after suffering for several days.

The protective suits he wore at that time failed to save these people's lives. The fabric of the protective suits was still too thin and the neck was not well protected. Lin Youdi survived because he was far away, but his neck was burned and left scars.

In the tragic accident, the Langzhu Yuwen Wen later suspended the experiment. The size of the device was greatly reduced and turned into a large pressure cooker like a rice jar, and what it wanted to drive was the lathe drill bit.

"Manager Lin, the pressure is coming!"

The shouting made Lin Youdi come to his senses. He looked at the air pressure pointer in the yellow area and immediately began to order according to the plan: "Click the switch and start running!"

Someone pulled a gate, and the large pressure cooker was trembling slightly. The hearts of the people present were all in their throats. Lin Youdi did not escape, but set an example and stood by his post, staring at the pressure gauge.

The pointer slowly falls back, which means that the air pressure in the large pressure cooker is decreasing. The reason for the decrease is that the steam is discharged.

Steam pushes the blade, and the blade drives an eccentric wheel to rotate like a water wheel. It finally drives the lathe drill bit through the connection device. Lin Youdi looks at the rapidly rotating drill bit and breathes a sigh of relief.

He directed his men to follow up the upper rotation meter and began to measure the rotation of the drill bit. However, the rotation meter soon broke down and the parts scattered after several clicks.

"Manager Lin, it's overturned!"

"Explode...explosion? Turn so fast!"

Lin Youdi was very surprised. They summed up nearly three years of experience and worked hard to create this rotation table. The upper limit of the measurement is quite high and is used to measure hydraulically driven lathes.

The rotation of the water conservancy lathe drill bit never exceeds 40% of the measurement upper limit, and the result is...

"Shut off the connection, turn off the heat, and release the steam!"

After the experiment ended, the results were as good as expected. Lin Youdi started to make records according to regulations, and after countless failures, he finally made progress.

When Lin Youdi opened the thick notepad, he looked at a tree-shaped picture and was immersed in the spirit. It was the so-called "technology tree" drawn by the Langzhu. Now the experiment team has just arrived, a fork called "steam".

Wind power, hydraulic power, human power, animal power, what Yuwen Wen called Lin Youdi is a force that has never been seen since ancient times. It is said that it can drive large ships and iron wheels.

Can it be realized? Lin Youdi doesn't know, and Yuwen Wen, who has always been full of confidence, doesn't know. He just let Lin Youdi grop slowly, maybe he has to grop for the rest of his life.
Chapter completed!