Chapter 63 Solar Cooker The worst thing is that in this era, rural people don't seem to pay much attention to hair cleanliness, and both adults and children have lice on their heads. For this reason, Zhou Yimin specially brought back a few bars of soap and gave two bars to his third aunt's family so that they could wash their hair regularly. At that time, there was no special shampoo. People used soap or perfumed soap to wash their hair and take a bath. When Zhou Yimin was a child in his previous life, he also used soap to take a bath, wash his hair, and even wash clothes. But later, for some reason, word spread that washing your hair with soap is bad for your hair and scalp, and will cause hair and scalp loss. Then, everyone started using shampoo. But people gradually found that using shampoo caused more hair loss. How many people in modern society have become bald or bald? In fact, it was just a rumor spread by shampoo merchants to promote their products. Just like the MSG routine. In some poor areas, people can't even use soap, so some people's hair is in clumps and has solidified. Zhou Yimin felt uncomfortable watching this. Zhou Yimin took out a pair of scissors and told Lai to take off his shirt and take a shower after the haircut.
It doesn’t matter what hairstyle it has. Why should a child look handsome? After all these operations, although he didn't turn into a monk, he still looked a bit like a prisoner in a labor camp. "Okay, go take a shower and wipe me thoroughly with soap. Make sure I'm clean." Zhou Yimin instructed him. Then, call Lai Fang over. Naturally, a girl’s hair couldn’t be cut like that, so she was given a hairstyle that would be very popular in two years - the Liu Hulan hairstyle. Neat, straight hair that just covers the ears. After cutting her hair, I also cleaned the lice off her head and sprayed medicine in her hair. "Don't move, sit here for half an hour." The old lady stood not far away and watched with a smile as Zhou Yimin busied himself with taking care of his two younger siblings. Aunt San came back to feed Qianqian and was also happy to see this scene, which showed that Yimin was willing to be close to her child. He just wiped it a few times and wanted to be perfunctory, but she scolded him and almost put him on the "torture device". "Yimin's hair is cut nicely." Third Aunt turned around and praised the old lady. She knew the old lady liked to hear this. The old lady nodded: "Yi Min grew up in the city after all, he is well-informed..." Zhou Yimin blushed when he heard that, and his head looked like it had been bitten by a dog. Can you boast about this? He was really convinced. "Yimin, what are you going to do now?" the old lady asked when she saw her grandson walking towards the kitchen again. What kind of man spends the whole day in the kitchen? "Boil some water and let Laifang wash her hair later." Zhou Yimin replied.
The water from the pressurized well was a little cold, and you could tell from the reaction. But since he had already washed it, there was nothing to say. Laifang was a girl, and she deserved to have her hair washed with hot water. Aunt San quickly said, "Why do we need hot water for washing?" The old lady said, "Just ask your third aunt to boil some water. Yimin, you can take a rest." She still loves her own grandson. "Yes, I'll go and cook it." Aunt San agreed, then put Qianqian, who had finished drinking her milk, down and walked towards the kitchen. Zhou Yimin stayed where he was and thought of a magical water-boiling device, the solar cooker, which was very popular in the 1980s and 1990s. It was not only used to boil water, but it was also said that some people in the north used it to cook rice and vegetables. Speaking of solar cookers, their structure is actually very simple. The most critical component is the concentrator, which is a concave arc-shaped concentrating plate. Use the reflection of sunlight to concentrate solar energy on one point, and then set up a rack so that the energy concentration point falls exactly on the kettle or pot. As far as Zhou Yimin knows, solar stoves were very popular in rural areas in the north in the 1980s and 1990s. It takes about 20 minutes to boil a pot of water in a solar cooker, especially in summer. Firstly, it does not require burning firewood, saving firewood and coal; secondly, as long as you put the pot or pan filled with water on it, you basically don't have to worry about it, saving energy. It is precisely this benefit that makes solar cookers popular among the people as soon as they appear. The structure of a solar cooker is simpler than that of a water pressure well. It also requires little technical content, but it is very practical. There's no problem taking this kind of thing out in advance. Zhou Yimin plans to make it so that his grandparents can boil water conveniently in the future. So he went back to his room and started drawing the blueprint. In the design of solar cookers, usually only the projection shape of the cooker body is given. Therefore, when drawing the actual contour line of the cooker body on the model, it is necessary to make the projection of the contour line on the ground as close to the designed shape and size as possible. A rectangular hole needs to be reserved in the middle of the stove body to meet the needs of the solar stove for elevation adjustment. The width of the hole is generally 50 mm, and the length should be adapted to the angle of elevation adjustment of the solar stove. The design was very simple and Zhou Yimin finished it in less than half an hour. "Grandma, I'm going back to the city. You don't have to cook for me tonight." "Well! Go ahead! Be safe." Recently, their grandson comes back almost every day. The two old people are very happy and don’t want to lock him up at home. Before dark, Zhou Yimin returned to the courtyard. "Yimin, come to my house for dinner tonight." Huang Suqin immediately invited Zhou Yimin when she saw him coming back. "Okay! Sorry to bother you, Aunt Huang." He originally thought that he would just buy some bread and biscuits from the store in his mind tonight. But since someone invited him, he should go! The original owner had often eaten at other people's homes, so there was nothing to be embarrassed about. Huang Suqin saw Zhou Yimin nod and happily went back to cook. Zhou Yimin picked up a pound of peanut oil and went to his third uncle's house.
"Brother Yimin, my dad is at home." Little Radish Head knew at a glance that the person was here to look for his father, and told him immediately. Zhou Yimin took out two White Rabbit candies and put them in his hand: "Give one to your sister." "Okay! Thank you, Brother Yimin." It turned out to be White Rabbit Milk Candy. He was so happy that he immediately went to his sister to present the treasure. "Yimin, have you eaten? I'll ask your third aunt..." As soon as the third uncle Yang Zhenhua saw Zhou Yimin coming to the door with something in his hand, he knew that he was a man who would not come to visit for no reason. Zhou Yimin waved his hand and interrupted, "No, Aunt Huang asked me to go eat later." "Okay! Then I won't be polite with you." The third uncle nodded. Zhou Yimin put the bottle of oil on the table and said straight to the point: "Uncle, it's the same thing as last time. Help me find someone to make something. It's very simple." The three uncles all smelled the scent of peanut oil. "No problem!" The third uncle agreed without saying a word. The last time there was such a big fuss, but nothing happened, so he became a lot bolder. "What will be invented this time?" he was curious. Zhou Yimin took out the blueprint and said, "Let me keep you in suspense. Let the master make two. When they are finished, I will put one in the courtyard to show everyone. It is definitely a good thing. Everyone in our courtyard should be able to use it." The third uncle took a look. Although he was not an engineer, he could understand such a simple drawing at a glance. I just don't know the specific use of this thing. But after hearing what Zhou Yimin said, he became even more curious. (End of this chapter)
