An icebox (also called a cold closet) is a compact non-mechanical refrigerator which was a common early-twentieth-century kitchen appliance before the development of safely powered refrigeration devices. Before the development of electric refrigerators, iceboxes were referred to by the public as "refrigerators". Only after the invention of the modern electric refrigerator did early non-electric refrigerators become known as iceboxes. [1] The terms ice box and refrigerator were used interchangeably in advertising as long ago as 1848. [2]
The first recorded use of refrigeration technology dates back to 1775 BC in the Sumerian city of Terqa. [3] It was there that the region's King, Zimri-lim, began the construction of an elaborate ice house fitted with a sophisticated drainage system and shallow pools to freeze water in the night. [3] Using ice for cooling and preservation was not new at that time, the ice house was an introductory model for the modern icebox. [4] The traditional kitchen icebox dates back to the days of ice harvesting, which was commonly used from the mid-19th century until the introduction of the refrigerator for home use in the 1930s. Most municipally consumed ice was harvested in winter from snow-packed areas or frozen lakes, stored in ice houses, and delivered domestically. In 1827 the commercial ice cutter was invented, increasing the ease and efficiency of harvesting natural ice. This invention reduced the cost of ice usage, thereby rendering it more common. [5]
Up until then, iceboxes for domestic use were not mass manufactured. By the 1840s, however, various companies, including the Baldwin Refrigerator Company and the Ranney Refrigerator Company, and later Sears, started making home iceboxes commercially. [6] D. Eddy & Son of Boston is considered to be the first company to produce iceboxes in mass numbers. [7] As many Americans desired large iceboxes, some companies, such as the Boston Scientific Refrigerator Company, introduced ones which could hold up to 50 lbs. of ice. [8] In a 1907 survey of expenditures of New York City inhabitants, 81% of the families surveyed were found to possess "refrigerators" either in the form of ice stored in a tub or iceboxes. [9] The industry's value in the United States rose from $4.5 million in 1889 to $26 million in 1919. [10]
The icebox was invented by an American farmer and cabinetmaker named Thomas Moore in 1802. [11] Moore used the icebox to transport butter from his home to the Georgetown markets, which allowed him to sell firm, brick butter instead of soft, melted tubs like his fellow vendors at the time. His first design consisted of an oval cedar tub with a tin container fitted inside with ice between them, all wrapped in rabbit fur to insulate the device. [11] Later versions would include hollow walls that were lined with tin or zinc and packed with various insulating materials such as cork, sawdust, straw, or seaweed. [12] A large block of ice is held in a tray or compartment near the top of the box. Cold air circulates down and around storage compartments in the lower section. Some finer models have spigots for draining ice water from a catch pan or holding tank. In cheaper models, a drip pan is placed under the box and has to be emptied at least daily. The user has to replenish the melted ice, normally by obtaining new ice from an iceman. The design of the icebox allowed perishable foods to be stored longer than before and without the need for lengthier preservation processes such as smoking, drying, or canning. [13] Refrigerating perishables also had the added benefit of not altering the taste of what it is preserving. [14]
Underground pits with the constant underground temperature of 12 °C (54 °F) had been used since Roman times to help preserve ice collected during winter. [16] The temperature of the soil is held relatively constant year-round when taken below the frost line, located 0.9 to 1.5 m (3 to 5 ft) below the surface, and varies from about 7 and 21 °C (45 and 70 °F) depending on the region. [17] Prior to the convenience of having refrigeration inside the home, cold storage systems would often be located underground in the form of a pit. These pits would be deep enough to provide thorough insulation and also to deter animals from intruding on the perishable items within. Early examples used straw and sawdust compacted along the sides of ice to provide further insulation and to slow the ice melting process. [16]
By 1781, personal ice pits were becoming more advanced. The Robert Morris Ice House, located in Philadelphia, brought new refrigeration technologies to the forefront. This pit contained a drainage system for water runoff as well as the use of brick and mortar for its insulation. The octagon-shaped pit, approximately 4 meters in diameter located 5.5 meters underground was capable of storing ice that was obtained during the winter months to the next October or November. [18] Ice blocks collected during winter months could later be distributed to customers. As the icebox began to make its way into homes during the early to mid 19th century, ice collection and distribution expanded and soon became a global industry. [19] During the latter half of the 19th century, natural ice became the second most important US export by value, after cotton. [19]
As the techniques for food preservation steadily improved, prices decreased and food became more readily available. [20] As more households adopted the icebox, the overall quality and freshness of this food was also improved. Iceboxes meant that people were able to go to the market less and could more safely store leftovers. All of this contributed to the improvement of the population's health by increasing the fresh food readily able to be consumed and the overall safety of that food. [21] However, with metropolitan growth, many sources of natural ice became contaminated from industrial pollution or sewer runoff.
Thanks to the icebox manufacturing industry's efforts, a new innovative idea in cooling came about: air circulation. The idea for air circulation in refrigeration systems stems back to John Schooley, who wrote about his process in the 1856 Scientific American , a popular science magazine. Schooley described the process as "Combining an ice receptacle with the interior of a refrigerator … a continuous circulation of air shall be kept up through the ice in said receptacle and through the interior of the refrigerator … so that the circulation air shall deposit its moisture on the ice every time it passes through it, and be dried and cooled." [22] This idea of air circulation and cold led to the eventual invention of the mechanical, gas-driven refrigerators. As these early mechanical refrigerators became available, they were installed at large industrial plants producing ice for home delivery.
By the early 1930s, mechanical ice machines gradually began to rise over the ice harvesting industry thanks to its ability to produce clean, sanitary ice independently and year-round. Over time, as the mechanical ice machines became smaller, cheaper, and more efficient, they easily replaced the hassle of getting ice from a source. For example, the De La Vergne Machine Company (originally called the De La Vergne Refrigerating Machine Company) of New York, New York could produce up to 220 tons of ice in a single day from a single machine. [23] With widespread electrification and safer refrigerants, mechanical refrigeration in the home became possible. With the development of the chlorofluorocarbons (along with the succeeding hydrochlorofluorocarbons and hydrofluorocarbons), that came to replace the use of toxic ammonia gas, the refrigerator replaced the icebox, though icebox is still sometimes used to refer to mechanical refrigerators.
Refrigeration is any of various types of cooling of a space, substance, or system to lower and/or maintain its temperature below the ambient one. Refrigeration is an artificial, or human-made, cooling method.
Freezing food preserves it from the time it is prepared to the time it is eaten. Since early times, farmers, fishermen, and trappers have preserved grains and produce in unheated buildings during the winter season. Freezing food slows decomposition by turning residual moisture into ice, inhibiting the growth of most bacterial species. In the food commodity industry, there are two processes: mechanical and cryogenic. The freezing kinetics is important to preserve the food quality and texture. Quicker freezing generates smaller ice crystals and maintains cellular structure. Cryogenic freezing is the quickest freezing technology available due to the ultra low liquid nitrogen temperature −196 °C (−320 °F).
An ice house, or icehouse, is a building used to store ice throughout the year, commonly used prior to the invention of the refrigerator. Some were underground chambers, usually man-made, close to natural sources of winter ice such as freshwater lakes, but many were buildings with various types of insulation.
A refrigerator, commonly fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. Refrigeration is an essential food storage technique around the world. The low temperature reduces the reproduction rate of bacteria, so the refrigerator lowers the rate of spoilage. A refrigerator maintains a temperature a few degrees above the freezing point of water. The optimal temperature range for perishable food storage is 3 to 5 °C. A freezer is a specialized refrigerator, or portion of a refrigerator, that maintains its contents’ temperature below the freezing point of water. The refrigerator replaced the icebox, which had been a common household appliance for almost a century and a half. The United States Food and Drug Administration recommends that the refrigerator be kept at or below 4 °C (40 °F) and that the freezer be regulated at −18 °C (0 °F).
A refrigerator car is a refrigerated boxcar (U.S.), a piece of railroad rolling stock designed to carry perishable freight at specific temperatures. Refrigerator cars differ from simple insulated boxcars and ventilated boxcars, neither of which are fitted with cooling apparatus. Reefers can be ice-cooled, come equipped with any one of a variety of mechanical refrigeration systems, or use carbon dioxide or liquid nitrogen as a cooling agent. Milk cars may or may not include a cooling system, but are equipped with high-speed trucks and other modifications that allow them to travel with passenger trains.
Pacific Fruit Express was an American railroad refrigerator car leasing company headquartered in San Francisco. At one point, it was the largest refrigerator car operator in the world.
An ice pack or gel pack is a portable bag filled with water, refrigerant gel, or liquid, meant to provide cooling. They can be divided into the reusable type, which works as a thermal mass and requires freezing, or the instant type, which cools itself down using chemicals but can only be used once. The instant type is generally limited to medical use as a cold compress to alleviate the pain of minor injuries, while the reusable type is both used as a cold compress and to keep food cool in portable coolers or in insulated shipping containers to keep products cool during transport.
Cold chain is a set of rules and procedures that ensure the systematic coordination of activities for ensuring temperature-control of goods while in storage and transit. The objective of a cold chain is to preserve the integrity and quality of goods such as pharmaceutical products or perishable good from production to consumption. Cold chain management earned its name as a "chain" because it involves linking a set of storage locations and special transport equipment, required for ensuring that temperature conditions for goods are met, while they are in storage or in transit from production to consumption, akin to the interconnected links of a physical chain.
A yakhchāl is an ancient type of ice house, which also made ice. They are primarily found in the Dasht-e Lut and Dasht-e-Kavir deserts, whose climates range from cold (BWk) to hot (BWh) desert regions.
An icemaker, ice generator, or ice machine may refer to either a consumer device for making ice, found inside a home freezer; a stand-alone appliance for making ice, or an industrial machine for making ice on a large scale. The term "ice machine" usually refers to the stand-alone appliance.
An icebox is a compact non-mechanical refrigerator which was a common kitchen appliance before the development of safe powered refrigeration devices.
An iceman is someone who sells or delivers ice from a wagon, cart, or motor-truck.
A refrigerator truck or chiller lorry, is a van or truck designed to carry perishable freight at low temperatures. Most long-distance refrigerated transport by truck is done in articulated trucks pulling refrigerated hardside (box) semi-trailers, although insulated curtainsiders are common in some countries. Occasionally, refrigerated trailers have been used as temporary morgues, and second-hand refrigerated trailers are frequently sold for use in tiny home conversions due to their insulation and existing status as a vehicle.
Cold is the presence of low temperature, especially in the atmosphere. In common usage, cold is often a subjective perception. A lower bound to temperature is absolute zero, defined as 0.00 K on the Kelvin scale, an absolute thermodynamic temperature scale. This corresponds to −273.15 °C on the Celsius scale, −459.67 °F on the Fahrenheit scale, and 0.00 °R on the Rankine scale.
A solar-powered refrigerator is a refrigerator which runs on energy directly provided by sun, and may include photovoltaic or solar thermal energy.
Ice cutting is a winter task of collecting surface ice from lakes and rivers for storage in ice houses and use or sale as a cooling method. Rare today, it was common before the era of widespread mechanical refrigeration and air conditioning technology.
Mary Engle Pennington was an American bacteriological chemist, food scientist and refrigeration engineer. She was a pioneer in the preservation, handling, storage and transportation of perishable foods and the first female lab chief at the U.S. Food and Drug Administration. She was awarded 5 patents, received the Notable Service Medal from President Herbert Hoover and the Garvin-Olin Medal from the American Chemical Society. She is an inductee of the National Inventor's Hall of Fame, the National Women's Hall of Fame and the ASHRAE Hall of Fame.
The ice trade, also known as the frozen water trade, was a 19th-century and early 20th-century industry, centering on the east coast of the United States and Norway, involving the large-scale harvesting, transport and sale of natural ice, and later the making and sale of artificial ice, for domestic consumption and commercial purposes. Ice was cut from the surface of ponds and streams, then stored in ice houses, before being sent on by ship, barge or railroad to its final destination around the world.
A California cooler, also known as a cooler cabinet, is a type of cabinet used for the cool storage of food items that was popular in the western United States, in the late 19th and early 20th century.
DOMELRE was one of the first domestic electrical refrigerators, invented by Frederick William Wolf Jr. (1879–1954) in 1913 and produced starting in 1914 by Wolf's Mechanical Refrigerator Company in Chicago. Several hundred units were sold, which made it the most commercially successful product out of several competing designs of its time. The unit replaced the block of ice in the icebox with an electrical-powered cooling device, and was completely automatic.
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