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An ultra low temperature (ULT) freezer is a refrigerator that stores contents at −80 to −86 °C (−112 to −123 °F). [1] An ultra low temperature freezer is commonly referred to as a "minus 80 freezer" or a "negative 80 freezer", referring to the most common temperature standard. [2] ULT freezers come in upright and chest freezer formats.
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.
Inside the freezer, air is circulated by means of one or more fans. In a typical design cold air from the freezer compartment is ducted to the fresh food compartment and circulated back into the freezer compartment. Air circulation helps sublimate any ice or frost that may form on frozen items in the freezer compartment. While defrosting, this ...
NBC News’ Dr. John Torres gets an inside look at the ultracold refrigerated trucks that could be used to store and transport the Pfizer Covid-19 vaccine should it be approved by the FDA.
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Portable Ice Chest, U.S. Patent # 2,663,167 (1953) A cooler, portable ice chest, ice box, cool box, [1] chilly bin (in New Zealand), or esky is an insulated box used to keep food or drink cool. Ice cubes are most commonly placed in it to help the contents inside stay cool.