RefrigeratorIt has been suggested that this article or section be merged into refrigeration. (Discuss) The inside of a fridgeA refrigerator (often shortened to fridge) is an electrical or gas appliance that uses refrigeration to help preserve food. A domestic refrigerator is present in 99.5% of American homes. It works using phase change heat pumps operating in a refrigeration cycle. An industrial refrigerator is simply a refrigerator used in an industrial setting, usually in a restaurant or supermarket. They may consist of either a cooling compartment only (a larger refrigerator) or a freezing compartment only (a freezer) or contain both. The dual compartment was introduced commercially by General Electric in 1939. Some refrigerators are now divided into four zones for the storage of different types of food:
The capacity of a refrigerator is measured in litres (or cubic feet). Typically the freezer volume is 100 litres (this will vary) and the refrigerator 140 litres. Types
Door situation
FeaturesSome newer refrigerators may feature:
An increasingly important environmental concern is the disposal of old refrigerators - initially because of the freon coolant damaging the ozone layer, but as the older generation of refrigerators disappears it is the destruction of CFC-bearing insulation which causes concern. Modern refrigerators usually use a refrigerant called HFC-134a (1,2,2,2-tetrafluoroethane) instead of freon, which has no ozone layer depleting properties. Disposal of discarded refrigerators is very often strictly regulated by municipalities, by mandating the removal of doors, as many children playing hide-and-seek have been asphyxiated while hiding inside a discarded refrigerator. Microwave-refrigerator comboA microwave/refrigerator combo is a freezer, refrigerator and microwave oven combined into a single, compact, energy-efficient unit. The foods can be transferred from one compartment to the other one following a timer to defrost, warm and cook them (with a week program, if necessary). HistoryAlthough ice houses have been used for thousands of years to provide a source of ice in summer, the first common domestic refrigeration was in the form of ice boxes in the latter years of the 19th Century. As the ice melted it was replaced with ice bought from commercial manufacturers. In 1856, using the principle of vapour compression, Australian James Harrison produced the world's first practical refrigerator. He was commissioned by a brewery to build a machine that cooled beer. In 1857, the first refrigerated railway car was introduced by the Chicago meatpacking industry, to prevent spoilage during shipping. In 1866, the first refrigerated railway car to carry fruit was built by Parker Earle of Illinois. The car was used to ship strawberries on the Illinois Central Railroad. The first domestic refrigerator was apparently manufactured in 1913 by Fred W. Wolf Jnr. in Chicago, and called the DOMELRE (DOMestic ELectric REfrigerator). It was not commercially successful, that distinction apparently going to the Kelvinator Company. This company was formed in May 1916 as the Electro-Automatic Refrigerating Company by Edmund J. Copeland and an industrialist, Arnold H. Gross. The company was renamed within two months to the Kelvinator Company and produced their first model shortly afterwards. Like most of their modern descendants, this refrigerator cooled using a phase change heat pump. The first refrigerators were of the "remote" type, essentially an upgrade of an existing ice box with the installation of a cooling unit in it, but the motor, compressor and condenser installed either beside it or in the basement. The first self-contained refrigerators were not manufactured until 1925. The earliest units used toxic refrigerants, typically ammonia (R-717), sulfur dioxide (R-764), or methyl chloride (R-40) as their refrigerant. The first refrigerator to see widespread use was the General Electric "Monitor-Top" refrigerator introduced in 1927. The compressor assembly, which produced substantial heat, was placed above the cabinet, and surrounded with a decorative ring. Over 1,000,000 units were produced. This refrigerator used sulfur dioxide refrigerant. Many units are still functional today. In the early 1920s the industry grew considerably, with some other manufacturers using absorption of ammonia in water instead of liquifying a gas through compression to achieve the phase change. A similar design, the Einstein refrigerator, used butane as a refrigerant and ammonia as a pressure-equalizing fluid. However, these were not very successful, largely because of public prejudice against ammonia as a refrigerant. Today they are used in homes that are not connected to the electric grid, and in recreational vehicles because they can be efficiently powered using a heat source rather than an electric motor. It was not until 1931 that Dupont produced commercial quantities of R-12, the first refrigerant which was neither toxic nor flammable. 1953 Philco refrigerator ad. Note freezer comparment located within larger refrigerator unit.Refrigerator Temperature SettingsTemperature settings for refrigerator and freezer compartments are given arbitrary numbers for example (1 through 9, warmest to coldest) by manufacturers, but generally 37 degrees F (3 degrees C) is ideal for the refrigerator compartment and 0 degrees F (-17 degrees C) for the freezer. If you suspect a problem, test the temperatures with a refrigerator or outdoor thermometer. How it worksSee Heat pump and Phase change heat pump Media |
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It was not until 1931 that Dupont produced commercial quantities of R-12, the first refrigerant which was neither toxic nor flammable. In the early 1920s the industry grew considerably, with some other manufacturers using absorption of ammonia in water instead of liquifying a gas through compression to achieve the phase change. Current members of the board of directors of the company are: John Cosentino, Richard Cunniff, John Kingsley, William Ruger, Stephen Sanetti, James E. Many units are still functional today. . This refrigerator used sulfur dioxide refrigerant. From 1949 through 2004, Ruger has built over 20 million firearms, and currently offers hundreds of models for hunters, target shooters, collectors, and law enforcement. Over 1,000,000 units were produced. Ruger continued to direct the company and until his death in 2002. The compressor assembly, which produced substantial heat, was placed above the cabinet, and surrounded with a decorative ring. After Alex Sturm’s death in 1951, William B. The first refrigerator to see widespread use was the General Electric "Monitor-Top" refrigerator introduced in 1927. Sturm, Ruger stock has been publicly traded since 1969, and became a New York Stock Exchange company in 1990 (NYSE:RGR). The earliest units used toxic refrigerants, typically ammonia (R-717), sulfur dioxide (R-764), or methyl chloride (R-40) as their refrigerant. Ruger Golf makes steel and titanium castings for golf clubs made by a number of different brands. The first self-contained refrigerators were not manufactured until 1925. Ruger Casting has plants in New Hampshire and Arizona, making ferrous, ductile iron and commercial titanium castings. The first refrigerators were of the "remote" type, essentially an upgrade of an existing ice box with the installation of a cooling unit in it, but the motor, compressor and condenser installed either beside it or in the basement. Like the 10/22, the MkII is extremely well supported with a variety of good aftermarket accessories. Like most of their modern descendants, this refrigerator cooled using a phase change heat pump. Ruger similarly dominates the .22 rimfire semiauto pistol market with the Ruger MK II. The company was renamed within two months to the Kelvinator Company and produced their first model shortly afterwards. It has produced a custom edition of it sold only by Wal-Mart. Gross. with its Ruger 10/22, and has had that dominance for some years now that was assured by its inexpensiveness and high quality. Copeland and an industrialist, Arnold H. Ruger has absolute dominance of the .22 rimfire rifle market in the U.S. This company was formed in May 1916 as the Electro-Automatic Refrigerating Company by Edmund J. Ruger Firearms is now the nation's largest firearms manufacturer, and the only one producing firearms in all four market segments: rifles, shotguns, pistols, and revolvers. It was not commercially successful, that distinction apparently going to the Kelvinator Company. They initially produced a .22 caliber pistol (see Ruger MK II), which became so successful that it launched the entire company. in Chicago, and called the DOMELRE (DOMestic ELectric REfrigerator). Ruger and Alexander McCormick Sturm in 1949 in a small, rented machine shop in Southport, Connecticut. Wolf Jnr. Sturm, Ruger & Company was founded by William B. The first domestic refrigerator was apparently manufactured in 1913 by Fred W. Ruger is the largest American firearms manufacturer. The car was used to ship strawberries on the Illinois Central Railroad. The best known division is the first one, because Sturm, Ruger was formed as a firearms company - in fact, the firearms division is often called "Sturm, Ruger" even though "Sturm" is no longer part of its official name. In 1866, the first refrigerated railway car to carry fruit was built by Parker Earle of Illinois. Sturm, Ruger & Company NYSE: RGR is a Connecticut-based manufacturing company composed of three divisions: Ruger Firearms, Ruger Investment Castings, and Ruger Golf. In 1857, the first refrigerated railway car was introduced by the Chicago meatpacking industry, to prevent spoilage during shipping. Ruger MP9. He was commissioned by a brewery to build a machine that cooled beer. 480 Super Redhawk. In 1856, using the principle of vapour compression, Australian James Harrison produced the world's first practical refrigerator. Blackhawk series. As the ice melted it was replaced with ice bought from commercial manufacturers. Bearcat. Although ice houses have been used for thousands of years to provide a source of ice in summer, the first common domestic refrigeration was in the form of ice boxes in the latter years of the 19th Century. Single Six. The foods can be transferred from one compartment to the other one following a timer to defrost, warm and cook them (with a week program, if necessary). Vaquero. A microwave/refrigerator combo is a freezer, refrigerator and microwave oven combined into a single, compact, energy-efficient unit. Ruger 22/45 MK III]]. Disposal of discarded refrigerators is very often strictly regulated by municipalities, by mandating the removal of doors, as many children playing hide-and-seek have been asphyxiated while hiding inside a discarded refrigerator. Ruger MK III. Modern refrigerators usually use a refrigerant called HFC-134a (1,2,2,2-tetrafluoroethane) instead of freon, which has no ozone layer depleting properties. Ruger MK II. An increasingly important environmental concern is the disposal of old refrigerators - initially because of the freon coolant damaging the ozone layer, but as the older generation of refrigerators disappears it is the destruction of CFC-bearing insulation which causes concern. Ruger MK I (not currently in production). Some newer refrigerators may feature:. Ruger P97. . P Series. Typically the freezer volume is 100 litres (this will vary) and the refrigerator 140 litres. Ruger 96/22. The capacity of a refrigerator is measured in litres (or cubic feet). Ruger 77/17. Some refrigerators are now divided into four zones for the storage of different types of food:. Ruger 77/22. The dual compartment was introduced commercially by General Electric in 1939. Ruger 10/22. They may consist of either a cooling compartment only (a larger refrigerator) or a freezing compartment only (a freezer) or contain both. M77 Mark II Assorted Models. An industrial refrigerator is simply a refrigerator used in an industrial setting, usually in a restaurant or supermarket. Ruger Police Carbine. It works using phase change heat pumps operating in a refrigeration cycle. Mini-30. A domestic refrigerator is present in 99.5% of American homes. Mini-14. A refrigerator (often shortened to fridge) is an electrical or gas appliance that uses refrigeration to help preserve food. This melts any ice which has collected around the coils and prevents it from building up. The cooling is periodically switched off (varies between every 6 to 24 hours depending on model) and the heater turned on until the temperature around the coils slightly exceeds the freezing point of water, after which normal cooling is resumed. In a refrigerator equipped for frost-free operation, a heater and a thermostat are fitted around the cooling coils. This can be removed by emptying the refrigerator and turning it off so that the ice melts. Over time atmospheric water vapor condenses onto the cooling coils as ice, which can eventually build up into a layer several centimetres thick. Frost-free operation. The maximum temperature reached during the power failure may be displayed, along with information on whether the frozen food has defrosted or may contain harmful bacteria. A power failure warning, alerting the user to the failure, usually by flashing the temperature display. Air from the freezer section is diverted to the refrigerator door, helping to keep milk or juice in the door shelf colder. A cooling zone in the refrigerator door shelves. In-door ice caddies are exclusive to side-by-side refrigerators. It is also removable, and helps to prevent icemaker clogging. An in-door ice caddie, which relocates the icemaker storage to the freezer door and saves approximately 2 cubic feet (60 L) of usable freezer space. Filter Status Indicator tells you when it's time for a change. An LCD suggesting what types of food should be stored at what temperatures and the expiration date of the food stored. This style is still common with small half-size refrigerators. One-door models, though still manufactured, are now rare in full size. Beginning in the early 1960s manufactuers began offering units with separate freezer compartments, which gradually took over the market. Originally, most units featured only one door, with the freezer compartment located within the larger refrigerator compartment. Single door. Made popular by Maytag. Allows the convenience of a side-by-side, but able to fit wider items in the refrigerator. Similar to side-by-side, but the refrigerator compartment is wider at eye level and becomes narrow at the bottom. Wide-by-side. The unit is divided into two tall compartments, with the freezer on the left and the refrigerator on the right. Side-by-side. Similar to bottom freezer, but the refrigerator (top) section has two doors that swing outward like a kitchen pantry. French door (or trio). The freezer is generally bigger and the refrigerator has two independent motor-compressors. Bottom freezer refrigerator (or bottom mount). Eye level freezer refrigerator (or top mount). Getting the right size refrigerator is very important when choosing integrated. The appliance is built in to your kitchen so that it looks like a normal cupboard. In-Column refrigerators or freezers: these are built into a tall cabinet in your kitchen furniture. Integrated. Often known as a Bar Fridge it is used in personal bars as a means to cool beverages. Built under: refrigerators and freezers which can be installed under the counter top. A counter depth refrigerator tends to come at a steep price premium despite providing less capacity. This allows the unit to be more flush with surrounding cabinets. Counter/cabinet depth: a refrigerator can be approximately 30 inches deep as opposed to approximately 35 inches deep like a normal refrigerator. Freestanding. 10°C (50°F) (vegetables). 4°C (40°F) (refrigerator). 0°C (32°F) (meats). -18°C (0°F) (freezer). |