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Carl von Linde, vapecheapuk an engineering professor on the Technological University Munich in Germany, patented an improved method of liquefying gases in 1876, vapebeste creating the primary dependable and e-zigarettevape environment friendly compressed-ammonia refrigerator. The absorption refrigerator ecigaretteuk was invented by Baltzar von Platen and Carl Munters from Sweden in 1922, vapecheapuk whereas they were nonetheless students at the Royal Institute of Technology in Stockholm.

Natural means are nonetheless used to cool foods today. This association has a couple of downsides: each compartment cannot be managed independently and the more humid refrigerator air is mixed with the dry freezer air. Most household freezers maintain temperatures from −23 to −18 °C (−9 to 0 °F), although some freezer-only units can achieve −34 °C (−29 °F) and lower. After which, the compressor runs at a minimum speed to just maintain the interior temperature.

A fan blows air from the compartment ("field air") throughout these coils or tubes and the refrigerant fully vaporizes, drawing further latent heat from the box air. If the defrosting system melts all of the ice before the timed defrosting interval ends, then a small system (called a defrost limiter) acts like a thermostat and shuts off the heating component to prevent too large a temperature fluctuation, it also prevents hot blasts of air when the system starts once more, vapeelectronique ought to it end defrosting early.

Some models for small households fit below kitchen work surfaces, often about 86 centimetres (34 in) excessive. Refrigerators and freezers may be free standing, or built right into a kitchen. These home units often required the set up of the mechanical components, vapecheapuk motor and compressor, within the basement or an adjoining room whereas the cold box was located within the kitchen.