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An electric water boiler, also called a thermo pot, is a
consumer electronics Consumer electronics or home electronics are Electronics, electronic (Analogue electronics, analog or digital electronics, digital) equipment intended for everyday use, typically in private homes. Consumer electronics include devices used for ...
small appliance A small domestic appliance, also known as a small electric appliance or minor appliance or simply a small appliance, small domestic or small electric, is a portable or semi-portable machine, generally used on table-tops, counter-tops or ot ...
used for boiling water and maintaining it at a constant temperature in an enclosed reservoir. It is typically used to provide an immediate source of hot water for making tea,
hot chocolate Hot chocolate, also known as hot cocoa or drinking chocolate, is a heated drink consisting of shaved chocolate, melted chocolate or cocoa powder, heated milk or water, and usually a sweetener like whipped cream or marshmallows. Hot chocolate ...
,
coffee Coffee is a drink prepared from roasted coffee beans. Darkly colored, bitter, and slightly acidic, coffee has a stimulating effect on humans, primarily due to its caffeine content. It is the most popular hot drink in the world. Seeds of ...
,
instant noodles Instant noodles, or instant ramen, is a type of food consisting of noodles sold in a precooked and dried block with flavoring powder and/or seasoning oil. The dried noodle block was originally created by Deep frying, flash frying cooked noodles, ...
, or baby formula, or for any other household use where clean hot water is required. They are a common component of Japanese kitchens and the kitchens of many East Asian countries but are found in varying use globally. Smaller units are portable. Some thermo pots are designed with a feature that can purify water.


Components

An electric water boiler consists of a water reservoir with a
heating element A heating element converts electrical energy into heat through the process of Joule heating. Electric current through the element encounters resistance, resulting in heating of the element. Unlike the Peltier effect, this process is independe ...
at the bottom. Some models offer multiple temperature settings. Other models are part of larger water systems that boil water and provide hot, cold, and
lukewarm Lukewarm or The Lukewarm may refer to: * Lukewarm (''Porridge''), a fictional character from the BBC series ''Porridge'' * "2 + 2 = 5" (song), a 2003 song by Radiohead alternatively titled "The Lukewarm" *"The Lukewarm," a song by Omar Rodríguez- ...
water. Water may be dispensed in various ways, e.g. by pouring, an electric pump or by pressing a large button that functions as a
diaphragm pump A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm (check valve, ...
. Electric water boilers have a built in thermostat that detects when water has reached its boiling point of to automatically shut off.


Sedimentation

Sedimentation is the accumulation within the water reservoir of natural minerals that exist in trace amounts in municipal water mains, mainly calcium carbonate. Heating the water causes the minerals to separate and fall to the bottom of the reservoir. This buildup can eventually create a variety of noises in gas boilers, reduce the efficiency of the unit and give rise to a sulfur (or rotten-egg) smell.
Vinegar Vinegar is an aqueous solution of acetic acid and trace compounds that may include flavorings. Vinegar typically contains 5–8% acetic acid by volume. Usually, the acetic acid is produced by a double fermentation, converting simple sugars to ...
or
citric acid Citric acid is an organic compound with the chemical formula HOC(CO2H)(CH2CO2H)2. It is a colorless weak organic acid. It occurs naturally in citrus fruits. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in t ...
can be used to descale electric kettles.


Uses

Some electric water boiler models enable tea to be steeped at a desired, adjustable temperature.


See also

* Samovar * Electric kettle *
Electric steam boiler An electric steam boiler is a type of boiler where the steam is generated using electricity, rather than through the combustion of a fuel source. Such boilers are used to generate steam for process purposes in many locations, for example laundrie ...
* Instant hot water dispenser *
Thermoelectricity The thermoelectric effect is the direct conversion of temperature differences to electric voltage and vice versa via a thermocouple. A thermoelectric device creates a voltage when there is a different temperature on each side. Conversely, whe ...
*
Joule heating Joule heating, also known as resistive, resistance, or Ohmic heating, is the process by which the passage of an electric current through a conductor produces heat. Joule's first law (also just Joule's law), also known in countries of former USS ...


References


Further reading


Materials and the Environment: Eco-informed Material Choice - M. F. Ashby
pp. 198–199. Retrieved on 2014-03-25.


External links

{{Home appliances Home appliances Boilers (cookware)