The Grandmother in the Siheyuan

Chapter 259 Learn mathematics, physics and chemistry well

The school quickly cleaned up a laboratory, which was relatively remote to facilitate confidentiality. Liu Hua got the key immediately. When he arrived at the door of the laboratory, there was a table at the door with a person sitting in front of it.

Although he was wearing casual clothes, he stood straight, and he was alert and attentive in all directions. He would immediately pay attention to the slightest sign of trouble with his eyes.

When Liu Hua approached the laboratory door, he immediately stood up and said, "Stop, hello, who are you looking for?"

Liu Hua was stunned for a moment: "Hello, this is the laboratory assigned to me by the school. Let me take a look and see what equipment I need to buy."

"Identification?"

Meticulously, Liu Hua took out his work ID from his pocket. After carefully comparing it, the guard saluted Liu Hua and said, "Hello, Professor Liu. I will be responsible for the security of the door of this laboratory from now on. I have five colleagues working in three shifts, two people in each shift, one in the light and one in the dark. I will call them to come and see you."

Liu Hua nodded: "You make the call first, I'll go into the lab to take a look."

There are already quite a few pieces of equipment in the laboratory, but they don't look brand new. I don't know where the school got them from, but Liu Hua figured it out and thought it should be enough for the time being.

When he came out of the laboratory, there were already six people standing at the door, all of them looking very capable.

After the six people took the initiative to report their names, Liu Hua nodded and said seriously: "The safety here will depend on you from now on."

"Make sure to complete the mission."

His true identity was revealed in one sentence. Liu Hua smiled bitterly and shook his head: "Relax a little, you have to pretend to be ordinary security personnel."

Several people looked at each other, as if they had just let something slip.

All avionics designs can only be done in this laboratory. Even Liu Hua will not bring the work here home. He can think about it when he gets home, but he will never write a single word about the work here. This is confidentiality.

To be honest, it is much quieter after returning home. The whole family lives in a courtyard house and there is no one to disturb us. When I went back to the courtyard house before, I would say hello to many people and sometimes even chat with them.

Now there is no need for that at all. You can just say a few words at the door and go in directly. People won’t chase you to chat. Liu Hua is proud of this. He can go to his own studio and do work that interests him.

Liu Feifei also felt that most of it was pretty good. The only thing that was not so good was that it was much quieter and there was no excitement, so she liked to chat with her neighbors at the door.

Liu Hua is now doing his favorite job in the workshop. The weather is too hot in summer and the whole family can't stand it. Although there is an electric fan, when it gets really hot, the wind blown out is also hot.

At this time, many families like to plant some ivy beside the wall. If the entire wall is covered with plants, heat cannot be retained, so the room will be cooler, but it is easy to breed mosquitoes. Being bitten by mosquitoes in the middle of summer is extremely annoying.

Liu Hua wanted to buy an air conditioner, but the quality of current air conditioner products is not up to standard, and they consume a lot of energy and make a lot of noise.

In view of this, Liu Hua started to make a small manual invention, a water air conditioner. Many people nowadays do not understand what a water air conditioner is. In fact, it is just like the cold palace of the ancient emperors, which uses flowing water to take away heat and achieve a cooling effect.

As an expert in mechanics, semiconductors, metallurgy and other fields, making a water air conditioner is a piece of cake for him.

He made the parts of the water-conditioning system by himself, installed the pipes by himself, and took care of all the rooms in the front yard, so that adults and children can sleep peacefully at night. Moreover, Liu Hua also used energy-saving technology. The chiller, water pump, compressor, and condenser he made by himself are all advanced technologies, but they are exchanged for real money points. They are not only energy-saving, but also low-noise.

It took almost half a month to make the parts, and Liu Hua spent another seven or eight days to install the pipes.

They picked a Sunday, and the whole family was there. Liu Hua even held a small ceremony, pressing the remote control that he had rubbed with his hands: "Everyone, open your eyes."

The water pump draws water from the well in the front yard very quietly, with only a slight buzzing sound. After condensation and compression, the cold water passes through the pipes, taking away the heat from the house.

In less than ten minutes, the whole family could clearly feel the temperature in the house drop, and the heat just now disappeared completely.

Liu Guodong leaned against the wall to look at the pipes, frowning and thinking for a while: "So this is the principle, Dad, in fact, only using a water pump to circulate water in the house continuously, can it also achieve the effect of cooling down?"

"That's right." Liu Hua nodded: "You should have learned something like this in junior high school."

"You use refrigerant to cool the water, which is better, but where can you buy refrigerant?"

"Good question." Liu Hua smiled and said, "Your father, I am a professor of this age. Can't I buy some chemical raw materials and make the refrigeration agent myself?"

Liu Hua patted his eldest son's head and said, "When we stop refrigerating and need to buy refrigerant, you can do it."

Liu Feifei said angrily, "How can a little kid like him mix refrigerants? That should be high-tech."

Liu Hua smiled and said, "He has also studied physical chemistry. There is nothing he doesn't know. I will give him the chemical equations and the raw materials when the time comes."

"Ah." Liu Guodong said in surprise: "I don't know what the reaction is, what conditions are needed, I don't know anything, how can I match it?"

Liu Hua gave his son a slap on the head and said, "Silly son, there is a place called a library in this world. If you can't do it, can't you learn it? You design the entire experimental steps first. I won't interfere. I just need to watch you and make sure you are safe."

Liu Feifei stroked her son's hair and said, "Son, if our air conditioner can't cool in the future, it will all depend on you."

Liu Guodong said anxiously: "No, mom, you can't be so cruel. I only studied high school chemistry and have never designed such a complicated plan."

"You will also be taking the college entrance exam next year." Liu Hua said with a smile: "Your science grades are pretty good. You will definitely do scientific research in the future. Designing experimental steps and conducting experiments by yourself are the most basic skills for scientific research. Work hard from now on."

Liu Feifei gave her son a thumbs up and said, "Come on, son. Mom is rooting for you."

Liu Guodong said with a sad face: "Dad, sometimes I think that studying liberal arts is also good. There are many job opportunities in the future. Maybe I can even become a cadre."

"Learn mathematics, physics and chemistry well, and you will not be afraid of traveling all over the world."

Liu Guodong shook his head: "It's better to have a good father than to be good at math, physics and chemistry."

(End of this chapter)