Diary Today is the light snow in the twenty-four solar terms.

Ice sold in Boston and Chicago is used by families because a new household equipment, refrigerator, the predecessor of modern refrigerator, was invented. Making an efficient refrigerator is not as simple as we thought.

/kloc-At the beginning of the 0/9th century, the knowledge of thermophysics, which is very important for refrigeration science, was very superficial. People who think that the best refrigerator should prevent the ice from melting.

The general view is obviously wrong, because it is the melting of ice that plays a cooling role. Early efforts to save the ice included wrapping the ice in blankets, which made the ice useless. Until nearly 19

At the end of this century, inventors have successfully found the exact balance between heat insulation and circulation required for efficient refrigerators. But as early as 1803, a talented inventor