The real refrigerator was invented in the 192s. In 192s, an engineer named Willis H. Carrier from a flat-panel printing factory in Brooklyn, new york, designed a system that could control temperature and humidity. The cellar owner and the manager of the milk company who stored fur further improved the mechanical refrigerator technology according to the needs. During the First World War, some smaller household refrigerators appeared. This is a new invention that is noisy and easy to leak. In fact, it just installs a motor and a rotating belt in the old "ice box" shell, which makes its appearance look like an experiment.

In p>1923, when Quidel, Danfray was a branch of General Motors, it introduced a new mechanical refrigerator component and assembled it into a refrigerator. The design of Frey Quidel refrigerator is to put the "ice box" for storing perishable food and the refrigeration machinery into a special cabinet. This device is quiet, convenient and compact. At this point, a new refrigerator style was born with brand names everywhere.

since then, with the sharp increase in production, the price of refrigerators has plummeted. By 1944, about 85% American families had mechanical refrigerators. "Ice box" has only been handed down as a word.