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Coldspot was a brand by US retail company Sears that existed from 1928 to 1976, when it was replaced with the Kenmore brand. [1] The brand was originally created for a line of refrigerators. Other products sold under the Coldspot brand included freezers, dehumidifiers, and window air conditioning units.
In 1976, Sears expanded the Kenmore name to its line of refrigerators, freezers, air conditioners, and dehumidifiers, which were previously branded as Coldspot. In 2016, the Kenmore brand was expanded into consumer electronics with the launch of Kenmore-branded high definition (Kenmore HDTV) and ultra HD (Kenmore Elite UHDTV) televisions. [7]
Sears Hometown and Outlet Stores Inc. was an American retail company that sold home appliances, lawn & garden equipment, apparel, mattresses, sporting goods, and tools. [3] [4] The company had four subsidiary store formats: Sears Hometown, Sears Outlet, Sears Hardware and Appliance, and Sears Home Appliance Showrooms. [5]
Innovations in the latter half of the 20th century allowed more ubiquitous air conditioner use. In 1945, Robert Sherman of Lynn, Massachusetts, invented a portable, in-window air conditioner that cooled, heated, humidified, dehumidified, and filtered the air. [37] The first inverter air conditioners were released in 1980–1981. [38] [39]
Food in a refrigerator with its door open. A refrigerator, commonly shortened to 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 temperature. [1]
The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. [1] [2] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs. The COP is used in thermodynamics.