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  2. Einstein refrigerator - Wikipedia

    en.wikipedia.org/wiki/Einstein_refrigerator

    The Einstein–Szilard or Einstein refrigerator is an absorption refrigerator which has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly invented in 1926 by Albert Einstein and his former student Leó Szilárd, who patented it in the U.S. on November 11, 1930 ( U.S. patent 1,781,541 ).

  3. Defrosting (refrigeration) - Wikipedia

    en.wikipedia.org/wiki/Defrosting_(refrigeration)

    In refrigerators, defrosting (or thawing) is the removal of frost and ice . A defrosting procedure is generally performed periodically on refrigerators and freezers to maintain their operating efficiency. Over time, as the door is opened and closed, letting in new air, water vapour from the air condenses on the cooling elements within the cabinet.

  4. Sabbath mode - Wikipedia

    en.wikipedia.org/wiki/Sabbath_mode

    Sabbath mode. Sabbath mode, also known as Shabbos mode (Ashkenazi pronunciation) or Shabbat mode, is a feature in many modern home appliances, including ovens, [ 1] dishwashers, [ 2] and refrigerators, [ 3] which is intended to allow the appliances to be used (subject to various constraints) by Shabbat-observant Jews on the Shabbat and Jewish ...

  5. Absorption refrigerator - Wikipedia

    en.wikipedia.org/wiki/Absorption_refrigerator

    An absorption refrigerator is a refrigerator that uses a heat source to provide the energy needed to drive the cooling process. Solar energy, burning a fossil fuel, waste heat from factories, and district heating systems are examples of convenient heat sources that can be used. An absorption refrigerator uses two coolants: the first coolant ...

  6. Auto-defrost - Wikipedia

    en.wikipedia.org/wiki/Auto-defrost

    A defrost timer taken out of a household refrigerator. The defrost mechanism in a refrigerator heats the cooling element (evaporator coil) for a short period of time and melts the frost that has formed on it. [ 1] The resulting water drains through a duct at the back of the unit. Defrosting is controlled by an electric or electronic timer.

  7. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    Globally. Food in a refrigerator with its door open. A refrigerator, commonly fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room ...

  8. Refrigeration - Wikipedia

    en.wikipedia.org/wiki/Refrigeration

    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 countries. The introduction of refrigerated rail cars contributed to the settlement of areas that were not on earlier main transport ...

  9. Magnetic refrigeration - Wikipedia

    en.wikipedia.org/wiki/Magnetic_refrigeration

    Magnetic refrigeration. Gadolinium alloy heats up inside the magnetic field and loses thermal energy to the environment, so it exits the field and becomes cooler than when it entered. Magnetic refrigeration is a cooling technology based on the magnetocaloric effect. This technique can be used to attain extremely low temperatures, as well as the ...

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