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An icebox (also called a cold closet) is a compact non-mechanical refrigerator which was a common early-twentieth-century kitchen appliance before the development of safely powered refrigeration devices. Before the development of electric refrigerators, iceboxes were referred to by the public as "refrigerators".
Commercial refrigerator and freezer units were in use for almost 40 years prior to the common home models. The freezer-over-refrigerator style had been the basic style since the 1940s, until modern, side-by-side refrigerators broke the trend. A vapor compression cycle is used in most household refrigerators, refrigerator–freezers and freezers.
A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.
Jacob Perkins patents a design for a practical refrigerator using dimethyl ether. [13] 1852 Lord Kelvin describes the theory underlying heat pumps. [14] 1855–1857 Peter von Rittinger develops and builds the first heat pump. [15] 1877
The original 600,000 sq ft (56,000 m 2) three-story factory and four-story administration building had been headquarters to Nash-Kelvinator from 1937 until 1954, as well as a factory for refrigerators, electric ranges, and commercial refrigeration—as well as airplane propellers for the U.S. military effort during World War II.
Geely was established in 1986 in Ningbo, Zhejiang by Li Shufu.Initially, the company entered the refrigerator manufacturing industry in Taizhou, Zhejiang.To start the company, Li Shufu had to borrow funds from his family.