In ancient times, the classification of boxes and cabinets was very simple. The boxes should be covered. The cabinets should have doors and doors. It is special when it comes to the refrigerator. As early as the pre-Qin period, we already had the prototype of the refrigerator. At that time, it was called ice, ice. The appearance of the Jian is generally a box. Put the ice in the box and you can save the food.
After the incoming refrigerator was introduced to China, people found that this thing is very similar to the ice used by the ancestors, so it was named the refrigerator, and then the box-shaped electric freezer came in, but the refrigerator has been used, so it can only be called Freezer.