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2. Auto-defrost - Wikipedia

   en.wikipedia.org/wiki/Auto-defrost

   The defrost timer is such that either the compressor or the defrost heater is on, but not both at the same time. 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.

3. Kelvinator - Wikipedia

   en.wikipedia.org/wiki/Kelvinator

   Kelvinator introduced the first auto-defrost models. [17] [18] Kelvinator refrigerators included shelves on the inside of their doors and special compartments for frozen juice containers in the freezer. [17] It also pioneered the side-by-side refrigerator freezer, the Foodarama series, in the mid-1950s.

4. Defrosting (refrigeration) - Wikipedia

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

   Furthermore, as the ice builds up it takes increasing space from within the cabinet - reducing the space available for food storage. Many newer units employ automatic defrosting (often called "frost-free" or "no frost") and do not require manual defrosting in normal use. Although, in some cases, users of Frost Free fridge/freezers have noted ...

5. Refrigeration - Wikipedia

   en.wikipedia.org/wiki/Refrigeration

   An 1870 refrigerator car design. Hatches in the roof provided access to the tanks for the storage of harvested ice at each end. Icemaker Patent by Andrew Muhl, dated December 12, 1871. In 1842, John Gorrie created a system capable of refrigerating water to produce ice. Although it was a commercial failure, it inspired scientists and inventors ...

6. Cascade refrigeration - Wikipedia

   en.wikipedia.org/wiki/Cascade_refrigeration

   Both types can be used in the same system, generally with the separate cycles being the first stage(s) and the auto-cascade being the last stage. Peltier coolers may also be cascaded into a multi-stage system to achieve lower temperatures. Here, the hot side of the first Peltier cooler is cooled by the cold side of the second Peltier cooler ...

7. Absorption refrigerator - Wikipedia

   en.wikipedia.org/wiki/Absorption_refrigerator

   Common absorption refrigerators use a refrigerant with a very low boiling point (less than −18 °C (0 °F)) just like compressor refrigerators.Compression refrigerators typically use an HCFC or HFC, while absorption refrigerators typically use ammonia or water and need at least a second fluid able to absorb the coolant, the absorbent, respectively water (for ammonia) or brine (for water).