In the Yuan Dynasty, people at that time would freeze milk and ghee to make the earliest ice cream, but what was it called at that time? Ice cream? .
Speaking of this, some people may wonder: how did the ice for making popsicles come from, and how did the early ice cream freeze?
How did the ice come from?
According to records, as early as the Zhou Dynasty, an official post was set up specifically for Bing, called? Wandering around? , and its subsidiary is? Ice politics? .
Due to the limited productivity and scientific and technological development at that time, people had no ice-making technology, so they could only get it from Hu Bo in winter, and then store it in a special freezer, which was distributed by the King of Zhou in summer.
It is difficult for ordinary officials to enjoy the conditions of obtaining and storing ice.
It was not until the Tang Dynasty that this situation improved.
Due to the improvement of gunpowder in the Tang Dynasty, people accidentally discovered that saltpeter, one of the main raw materials for manufacturing gunpowder, had the characteristics of heat absorption, so people at that time made wonderful use of it and finally mastered the method of making ice.
After making ice, look at the ice storage technology? Ice guide?
Ice guide can also be understood as an early refrigerator.
The earliest ice inscriptions were also contributed by the Zhou Dynasty. They are generally made of wood or bronze, and the inside is divided into two layers. The inner layer can hold food, and the outer layer is placed with ice cubes, which is not only convenient for eating, but also can lower the room temperature.
The cool weapon of ordinary people? good
Due to the complexity of taking ice, making ice and storing ice, it is difficult for ordinary people to get convenience, and wells have become their main tools to cool off the heat.
For example, when many of us were young, we would put watermelons into wells in summer? Cold storage? .
In addition to cooling food, wells can also release cold air like air conditioners. For example, Cao Cao once dug a deep well in Yecheng to collect cold air.
The specific way is to dig a well in the room, but this well is not necessarily used to draw water. There must be a cover with a hole on it, which will be warm in winter and cool in summer.
Roadside pavilion
About the pavilion, it is not only a short and simple pavilion that everyone understands, but also a truly high-tech pavilion from the Tang Dynasty? Including Qingliang Temple? .
Temples with cold water are often built at the water source, and artificial large waterwheels are used to simulate the rainfall effect. On the periphery of the temple, a large rocking fan powered by water is facing the water curtain, thus playing the role of fan air conditioning indoors.
In addition to these natural cooling methods that need to be used or modified, there are shaft-driven half-man hand-cranked fans, cold pillows, and big white gourd that is put in the well to cool down and sleep at night.