"Haha, that's enough. If it's not enough, tell dad to make more."
"Yeah!" Zhao Yun'er responded.
Zhao Yun'er polished the wooden boards on the ground first, then took out nails and nailed the boards together with a small hammer.
It took an hour to finally make a wooden box.
Zhao Yun'er deliberately added a few more layers around the wooden box to make the box more tightly sealed.
As for the inside of the box, Zhao Yun'er got some more glue and mixed it with some sand to seal the surroundings of the box to ensure that the box would not be ventilated. Even if the ice cubes are placed inside, they won't melt so quickly.
The box is neither big nor small, and you can put a lot of vegetables in it. There is a lid on it, just put it on.
Zhao Wenhua and Liang Jinqiao stared at the side and became even more confused when they saw that Zhao Yun'er had been working on it for a long time and only got one box out in the end.
"Can this box keep leftovers from going rancid?" Liang Jinqiao couldn't help but ask.
Zhao Yun'er was amused by Liang Jinqiao, "Of course not! Mom, don't worry, you will know later! Haha!"
Liang Jinqiao responded, "Haha, okay, mother, wait!"
Zhao Yun'er took the box outside to dry it in the sun. The sun was shining on this hot day, and after a while, the paste on the box dried.
Zhao Yun'er looked at it and started to take out the saltpeter and get some ice cubes.
Thick ice cubes were broken up and spread in the box.
Zhao Yun'er then took the lid and closed it, then found a tattered quilt that was not needed on the bed and came out.
"Father, mother, that's enough!" Zhao Yun'er said with a smile.
Liang Jinqiao and Zhao Wenhua looked at each other for a few times, "Isn't it easy for the ice cubes to melt inside? Wouldn't it melt faster if you still cover yourself with a quilt on such a hot day?"
"Yes, girl Yun'er, can you store the ice cubes overnight? Even if you put the food in it, I don't think it can be stored for too long."
"When the ice cubes melt, the food inside won't be as cold anymore, and the food will go rancid again!"
"Girl Yun'er, are you sure this is really okay?"
Zhao Wenhua and Liang Jinqiao kept talking to each other, but they didn't seem to believe that the box could be so magical.
If you put ice cubes in it overnight, they will definitely melt into water in a short time.
"Mom, don't you know this? Covering it with a quilt will not only stop it from melting, but will also make it melt slower!"
"How...how could this happen?" Liang Jinqiao muttered.
"This quilt has a thermal insulation effect. It is cool inside and the cool air will be trapped. The hot air from outside will not easily get in." Zhao Yun'er explained.
"Is that so? Can it really be kept overnight?"
Zhao Yun'er nodded, "It should be possible! As long as it stays overnight, we can continue to get some ice cubes in the next day. The vegetables will definitely not go rancid if they are placed in it."
"Then let's try it tonight!"
"OK!"
Zhao Yuner is very confident in the simple refrigerator she made.
Once this refrigerator is built, I can make a few more later and send one to Mulan's family, who will definitely be able to use it.
Seeing the simple refrigerator that was made, Zhao Yun'er couldn't wait to make some herbal tea and put it in it.
On this hot day, it’s easy to get heat stroke, so it would be a good idea to make some iced mung bean soup.
She went to Yangcheng last time and bought a lot of mung beans. She hasn't cooked them yet. She can cook some today and give them a try.