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A freezer is a specialized refrigerator, or portion of a refrigerator, that maintains its contents’ temperature below the freezing point of water. [4] The refrigerator replaced the icebox , which had been a common household appliance for almost a century and a half.
While this technique was originally applied to the refrigerator compartment, it was later used for freezer compartment as well. A combined refrigerator/freezer which applies self-defrosting to the refrigerator compartment only is usually called "partial frost free" or semi-automatic defrost (some brands call these "Auto Defrost" while Frigidaire referred to their semi-automatic models as ...
Regular ice can maintain temperatures near, but not below the freezing point, unless salt is used to cool the ice down further (as in a traditional ice-cream maker). Dry ice can reliably bring the temperature well below water freezing point.
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The Amana Corporation is an American brand of household appliances. It was founded in 1934 by George Foerstner as the Electrical Equipment Co. in Middle Amana, Iowa, to manufacture commercial walk-in coolers. The business was later owned by the Amana Society and became known as Amana Refrigeration, Inc. [2] It is now owned by the Whirlpool ...
Freezer burn appears as grayish-brown leathery spots on frozen food and occurs when air reaches the food's surface and dries the product. Color changes result from chemical changes in the food's pigment. Freezer burn does not make the food unsafe; it merely causes dry spots in foods. [2]
The freezing technique itself, just like the frozen food market, is developing to become faster, more efficient and more cost-effective. As demonstrated by Birdseye's work, faster freezing means smaller ice crystals and a better-preserved product. [8] Birdseye's original cryogenic freezing approach using immersion in liquid nitrogen is still ...
Ice cream was made by hand in a large bowl placed inside a tub filled with ice and salt. This is called the pot-freezer method. [56] French confectioners refined the pot-freezer method, making ice cream in a sorbetière (a covered pail with a handle attached to the lid). In the pot-freezer method, the temperature of the ingredients is reduced ...