Siheyuan starts from a better life

Chapter 662, pressure cooker
Jiang Yan was quite aware of the fact that rice cookers and air fryers were not easy to use on the plateau, and he also knew what the problem was. However, Jiang Yan did not take this issue into consideration during the previous design.

In high altitude areas, because the boiling point of water becomes very low and the water temperature cannot rise, it is difficult to cook rice. The heating control of the rice cooker is mainly through controlling the heating temperature and heating time of the inner pot. The sensors related to the heating status are all for the inner tank. The heating of the upper steamer is indirectly controlled by heating the inner pot. Therefore, when the rice cooker itself does not have a corresponding preset heating method, it is troublesome to master the appropriate rice steaming method, and the atmospheric pressure has a considerable impact on it.

Later generations also adopted the method of high-pressure rice cookers, which solved this problem by increasing the pressure.

After all, the higher the altitude, the lower the atmospheric pressure.

As for the air fryer, it is relatively better. Although the atmospheric pressure has a certain impact, the impact is not significant. However, compared to low altitude areas, you only need to adjust the time a little longer.

It's not that Jiang Yan can't make a high-pressure rice cooker. It's not difficult to complete it according to current technology. It can be done in minutes by drawing a picture. However, Jiang Yan feels that on the plateau, the function of this rice cooker is too high. Single, not very easy to use, might as well use a pressure cooker.

A pressure cooker is also called a pressure cooker or a pressure cooker. The pressure cooker uses the physical phenomenon that the boiling point of liquid under higher pressure increases, allowing the water to reach a higher temperature without boiling, thereby speeding up the efficiency of stewing food.

The pressure cooker, also called the "Papin cooker", was invented by a French doctor named Denis Papin. Papin is not only a doctor, but also a physicist and mechanical engineer. Solid theoretical knowledge of physics and mechanics was the reliable foundation for his invention of the pressure cooker.

The principle of a pressure cooker is very simple, because the boiling point of water is affected by air pressure. The higher the air pressure, the higher the boiling point. In high mountains and plateaus, the air pressure is less than 1 standard atmosphere, and the boiling point of water is lower than 100°C, so water can boil at less than 100°C, and eggs cannot be cooked in ordinary pots. When the air pressure is greater than 1 atmosphere, water will boil only when the temperature is higher than 100°C.

The commonly used pressure cookers are designed using this principle. The pressure cooker seals the water quite tightly. The water vapor generated by the heated evaporation cannot diffuse into the air and can only be retained in the pressure cooker. This makes the air pressure inside the pressure cooker higher than 1 atmosphere, and also makes the water at a temperature higher than 100°C. When it boils, a high-temperature and high-pressure environment will be formed inside the pressure cooker, and the rice will be cooked easily and quickly, and will be quite crispy. Of course, the pressure inside the pressure cooker is not unlimited, otherwise it will explode.

In terms of raw materials: generally divided into two types: aluminum alloy and stainless steel.

The pressure cooker consists of a pot body, a lid, a fusible piece, a vent hole, a safety valve, a sealing rubber ring, and other new forms of vent channels.

In terms of energy, there are two types: ordinary energy pressure cookers and electric pressure cookers. Therefore, considering the current environment, choosing an ordinary energy pressure cooker is the most suitable and the easiest thing to make.

The fusible piece is installed as a backup insurance to prevent the safety valve from malfunctioning. It is made of aluminum alloy material with a lower melting point. Once the safety valve fails, the pressure in the pot is too high, and the temperature also rises. When the temperature reaches the melting point of the fusible piece, if the heating continues, the fusible piece begins to melt, and the gas in the pot will eject from the fusible piece, causing the inside of the pot to The pressure is reduced to prevent explosion accidents.

Ordinary aluminum alloy pressure cookers are light in weight, have fast heat transfer, are cheap, have an aluminum oxide layer on the surface to prevent corrosion (avoid damage), and can be quickly cooled with cold water. The service life is calculated based on 1 hour of use per day. Its service life is 8 years. Suitable for induction cookers.

The stainless steel composite bottom aluminum alloy pressure cooker is as suitable for induction cookers as the stainless steel pressure cooker. It also has the advantages of ordinary aluminum alloy pressure cookers. It avoids high heat when using an open flame, and the bottom prevents rapid cooling to prevent the stainless steel composite bottom from deforming and falling off.

Stainless steel pressure cookers are expensive: they are heat-resistant, beautiful, and do not easily react with acids, alkalis, and salts in food. The service life is about 10 years after one hour a day. It is suitable for induction cookers. It is easy to change color on gas stoves and electric stoves. It cannot be quickly cooled with cold water and is not suitable for decoction of traditional Chinese medicine.

Don't think about alloys anymore. It's not enough for other uses, let alone the production of pressure cookers, so you can only choose to use stainless steel. Fortunately, the country's stainless steel production has been increasing. After thinking about the pressure cooker, Jiang Yan suddenly thought that it seemed that the first pressure cooker in China was the "Double Happiness" brand. They independently developed my country's first pressure cooker in 1964 and my country's first electric pressure cooker in 1990. In 2008 The millionth pressure cooker rolled off the production line, and it is the only company in the world that has produced and sold more than million pressure cookers. For a long time, most families were proud to own a Double Happiness pressure cooker.

Therefore, whether this thing is sold for export or domestic sales, there is quite a market.

It seems that there was a pressure cooker of this brand in my home before, but the name "Double Happiness" is very good. If it doesn't work, I will name it after this, which can be regarded as retaining the brand. However, the manufacturer who invented it before could not think about it. Who called it? I invented it earlier than they did. Thinking of this, Jiang Yan laughed obscenely.

Seeing Jiang Yan's smile like this, Representative Wu was shocked. It had to be said that Jiang Yan's smile was so weird that he could only think about the bad things.

However, he couldn't help but said: "Mr. Jiang, Mr. Jiang."

"Oh! Sorry, I was distracted just now. Don't worry, I will handle these problems and definitely let our plateau warriors use good things."

"That's good, that's good. I know Jiang will always have a corresponding solution. Then I'll wait for your good news."

Representative Wu's subtle flattery was very helpful to Jiang Yan. To be honest, Jiang Yan could tell that he was flattering, but this flattery still depends on the person, and people are different after all.

"Mr. Jiang, I won't disturb you here. You are busy first." Representative Wu apologized and left Jiang Yan's office. Jiang Yan found that Representative Wu seemed to have left relatively quickly. Jiang Yan was puzzled, but he couldn't think about it now.

After Representative Wu left, Jiang Yan took another look at the materials he brought over, then put them aside, lit a cigarette and stood in front of the window.

To be honest, there is an air fryer and a rice cooker. As long as these two items are operated well, in addition to the air fryer, this rice cooker can almost support a factory for thirty years or even longer. This has been proven by later generations. It proves that now that I have built this pressure cooker, I don’t know if this third product is suitable together. The output of this thing in later generations is quite huge.

However, if you want to produce such a product, this person is an indispensable factor. I heard Director Wang say before that the personnel of the newly established factory with the steel rolling mill will be initially set at 3000 people. The steel rolling mill will support 1000 skilled workers, and the rest will be oriented to the society. Recruitment, but with this pressure cooker project, it is estimated that these 3000 people may not be enough.

This is really a bit worrying. Thinking of this, Jiang Yan couldn't help but sigh. Others are worried about not having products to produce, but he is also worried about having too many products.

The next moment, Jiang Yan thought that he seemed to have entered a misunderstanding. Why did he think about it like this? If he outsourced the parts of the product, it would be over. He only had to master his own core and assembly. Thinking of this, Jiang Yan I felt relieved.

But now my first goal is to get the blueprint of this pressure cooker.

(End of this chapter)