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Freezer units are used in households as well as in industry and commerce. 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.
Barbara Haviland Minor is an American chemical engineer, known for the development of refrigerants.She was technical leader for chemical company DuPont in the development of R-1234yf, [1] a refrigerant which, as of 2018, was used in 50% of all new vehicles produced by original equipment manufacturers, [2] and which represented an important contribution to countering global warming.
In the late 19th through mid-20th centuries, mechanical refrigeration was developed, improved, and greatly expanded in its reach. [3] Refrigeration has thus rapidly evolved in the past century, from ice harvesting to temperature-controlled rail cars, refrigerator trucks, and ubiquitous refrigerators and freezers in both stores and homes in many ...
Sub-Zero was founded as the Sub-Zero Freezer Company on August 20, 1945 by Westye F. Bakke in Madison, Wisconsin. [2] In 2000, it acquired the domestic appliance line of the Wolf Range Corporation, [3] a California-based manufacturer of professional-style ranges, cooktops and grills for both home and commercial use.
By the 1980s, the company was known as LEC Refrigeration plc, an LSE listed company. In March 1993, the company laid off staff, and its workforce dropped to below 1,000, when it decided to import its compressors from Denmark instead of making them itself.
In 1950 the company was sold to a group of investors, including its founder, and became Amana Refrigeration, Inc. [5] In 1954, it began making air conditioners. [6] Amana was acquired in 1965 by Raytheon, [7] which had invented the microwave oven in 1947, and introduced the commercial Radarange Model 1611 in 1954. [5]
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