Rice cooker

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Electric induction rice cooker with scoop Rice Cooker 1.png
Electric induction rice cooker with scoop

A rice cooker or rice steamer is an automated kitchen appliance designed to boil or steam rice. It consists of a heat source, a cooking bowl, and a thermostat. The thermostat measures the temperature of the cooking bowl and controls the heat. Complex, high-tech rice cookers may have more sensors and other components, and may be multipurpose.

Contents

The term rice cooker formerly applied to non-automated dedicated rice-cooking utensils, which have an ancient history (a ceramic rice steamer dated to 1250 BC is on display in the British Museum). It now applies mostly to automated cookers. Electric rice cookers were developed in Japan, where they are known as suihanki (Japanese : 炊飯器, literally, "boil-rice-device"). [1]

History

A 1956 advertisement for Toshiba's world's first automatic electric rice cooker, priced at 3,200 yen and capable of cooking 900 grams (2.0 lb) of rice. Electric Rice Cooker 1956.jpg
A 1956 advertisement for Toshiba's world's first automatic electric rice cooker, priced at 3,200 yen and capable of cooking 900 grams (2.0 lb) of rice.

The NJ-N1, developed by Mitsubishi Electric in 1923, was the first electric rice cooker, a direct ancestor of today's automatic electric rice cookers. At that time, electricity was not widely used in ordinary households; it was for use on ships. [1] [2] It was a simple mechanism that heated with an attached heating coil without automation. [3]

In the 1940s and early 1950s, Mitsubishi Electric, Matsushita Electric (now Panasonic), and Sony introduced electric rice cookers for home use with built-in heating coils, but they too were not automated and were not well received and sold poorly. [3]

The ER-4, [4] [5] introduced by Toshiba on December 10, 1955 [5] [6] [7] (or 1956 [3] ), was the world's first automatic electric rice cooker for home use. It was developed by Toshiba's Shogo Yamada beginning in 1951 and completed in 1955 thanks to a breakthrough invention by Yoshitada Minami (ja), president of a Toshiba partner company. [1] [3] [6] [7] Research and development was a continuous process of trial and error. Research showed that rice cooks best when cooked at a temperature of 98 °C (208 °F) for 20 minutes, so theoretically rice should cook well if an automatic timer is set to turn off the cooker 20 minutes after the water in the pot has boiled. However, the time it takes for the water to boil varies depending on the temperature, the amount of heat generated by the pot, and the amount of rice and water, so in the prototype stage, sometimes the rice was overcooked and burnt, while at other times it was undercooked and the rice was left with a core. The revolutionary idea to solve this problem was to use a double-layered structure for the pot. The mechanism involved filling the outer pot with a glass of water and heating it. After about 20 minutes, the water would evaporate and the temperature would rise rapidly, which the thermostat would detect and turn off. [3] [6] [7] [1]

The initial launch price was 3,200 yen, about one-third of the average college graduate's starting monthly salary. [7] At its launch, 700 units were produced, but they did not sell well. The company then conducted sales promotions using the sales networks of electric power companies, held sales demonstrations, and sold an automatic timer that could turn on the rice cooker at any time, and the product's popularity exploded. By 1960, four years after its introduction, the automatic electric rice cooker was in use in about half of all Japanese households. [8] [6]

The success of Toshiba's automatic electric rice cookers sparked a "manufacturing war", and Matsushita Electric entered the field as early as 1956 with the EC-36. The EC-36 was a cheaper product that used a single pot, reducing the amount of metal used and making it more competitive in terms of sales. [1]

Later, the automatic electric rice cooker was well received in Asian countries and around the world under the name "Automatic Rice Cooker". It also had a great impact on society, giving housewives more time and accelerating the women's liberation movement. [8] On the other hand, Helen Macnaughtan argued that the invention of the automatic electric rice cooker, which freed women from menial tasks in the kitchen and allowed some women to work part-time, was not a great victory for women's liberation because it gave them more time to devote to other household tasks. [1]

In 1972, a rice cooker with a heat-retention function was introduced, and in 1979, an electronic rice cooker equipped with a microcomputer that could also manage the soaking of rice after washing and the heat level. In 1988, rice cookers with electromagnetic induction heating were introduced, which provided higher heating. [8]

Principle of operation

Traditional rice cooker commonly used in the Netherlands by residents of the former Dutch East Indies (now: Indonesia) in the 1950s. Showcase on display at the Eurasian festival Tong Tong Fair 2012. Rijstkoker.jpg
Traditional rice cooker commonly used in the Netherlands by residents of the former Dutch East Indies (now: Indonesia) in the 1950s. Showcase on display at the Eurasian festival Tong Tong Fair 2012.
A typical commercial gas cooker. To use it, the left lever is depressed to ignite the pilot burner for standby and keep-warm purposes. To start cooking, the right lever is pushed to operate the main burner, which is ignited by the pilot burner. Like its electric counterpart, the cook lever releases automatically once the rice is fully cooked. Hezery99-Gas rice cooker.jpg
A typical commercial gas cooker. To use it, the left lever is depressed to ignite the pilot burner for standby and keep-warm purposes. To start cooking, the right lever is pushed to operate the main burner, which is ignited by the pilot burner. Like its electric counterpart, the cook lever releases automatically once the rice is fully cooked.
Basic principle of electric rice cooker operation Electric Rice Cooker.png
Basic principle of electric rice cooker operation

A basic rice cooker has a main body (pot), an inner cooking container which holds the rice, an electric heating element, and a thermostat. [9]

The bowl is filled with rice and water and heated at full power; the water reaches and stays at boiling point (100 °C, 212 °F). [10] When the water has all been absorbed, the temperature can rise above boiling point, which trips the thermostat. Some cookers switch to low-power "warming" mode, keeping the rice at a safe temperature of approximately 65 °C (150 °F); simpler models switch off; the rice has entered the resting phase.

More advanced cookers may use fuzzy logic for more detailed temperature control, induction rather than resistive heating, a steaming tray for other foods, and even the ability to rinse the rice. [10]

Inexpensive electric rice cooker containing cooked rice Rice-cooker.jpg
Inexpensive electric rice cooker containing cooked rice


Rice types and rice cookers

Brown rice generally needs longer cooking times than white rice, unless it is broken, or flourblasted (which perforates the bran). [11]

Many models feature an ability to cook sticky rice or porridge as an added value. Most can be used as steamers. Some can be used as slow cookers. Some other models can bake bread or in some cases have an added function to maintain temperatures suitable for fermentation of bread dough or yogurt. Multi-purpose devices with rice cooking capability are not necessarily called "rice cookers", but typically "multi-cookers". [12]

A rice cooker, or slow cooker, can be used in conjunction with a temperature probe and an external thermostat to cook food at a stable low temperature ("sous-vide"). [13]

Other uses

Steam rice cookers have been shown to be effective for decontamination of face masks. [14]

See also

Related Research Articles

<span class="mw-page-title-main">Pressure cooker</span> Device for preparing food

A pressure cooker is a sealed vessel for cooking food with the use of high pressure steam and water or a water-based liquid, a process called pressure cooking. The high pressure limits boiling and creates higher temperatures not possible at lower pressures, allowing food to be cooked faster than at normal pressure.

<span class="mw-page-title-main">Steaming</span> Cooking technique

Steaming is a method of cooking using steam. This is often done with a food steamer, a kitchen appliance made specifically to cook food with steam, but food can also be steamed in a wok. In the American Southwest, steam pits used for cooking have been found dating back about 5,000 years. Steaming is considered a healthy cooking technique that can be used for many kinds of foods.

<span class="mw-page-title-main">Simmering</span> Cooking technique

Simmering is a food preparation technique by which foods are cooked in hot liquids kept just below the boiling point of water and above poaching temperature. To create a steady simmer, a liquid is brought to a boil, then its heat source is reduced to a lower, constant intensity.

<span class="mw-page-title-main">Oven</span> Enclosed chamber for heating objects

An oven is a tool that is used to expose materials to a hot environment. Ovens contain a hollow chamber and provide a means of heating the chamber in a controlled way. In use since antiquity, they have been used to accomplish a wide variety of tasks requiring controlled heating. Because they are used for a variety of purposes, there are many different types of ovens. These types differ depending on their intended purpose and based upon how they generate heat.

<span class="mw-page-title-main">Kitchen stove</span> Kitchen appliance designed for the purpose of cooking food

A kitchen stove, often called simply a stove or a cooker, is a kitchen appliance designed for the purpose of cooking food. Kitchen stoves rely on the application of direct heat for the cooking process and may also contain an oven, used for baking. "Cookstoves" are heated by burning wood or charcoal; "gas stoves" are heated by gas; and "electric stoves" by electricity. A stove with a built-in cooktop is also called a range.

<span class="mw-page-title-main">Slow cooker</span> Countertop electrical cooking appliance used to simmer food

A slow cooker, also known as a crock-pot, is a countertop electrical cooking appliance used to simmer at a lower temperature than other cooking methods, such as baking, boiling, and frying. This facilitates unattended cooking for many hours of dishes that would otherwise be boiled: pot roast, soups, stews and other dishes.

The Japanese kitchen is the place where food is prepared in a Japanese house. Until the Meiji era, a kitchen was also called kamado and there are many sayings in the Japanese language that involve kamado as it was considered the symbol of a house. The term could even be used to mean "family" or "household". Separating a family was called kamado wo wakeru, or "divide the stove". Kamado wo yaburu means that the family was broken.

<span class="mw-page-title-main">Kettle</span> Vessel used to boil water

A kettle, sometimes called a tea kettle or teakettle, is a device specialized for boiling water, commonly with a lid, spout, and handle. There are two main types: the stovetop kettle, which uses heat from a hob, and the electric kettle, which is a small kitchen appliance with an internal heating element.

<span class="mw-page-title-main">Induction cooking</span> Direct induction heating of cooking vessels

Induction cooking is a cooking process using direct electrical induction heating of cooking vessels, rather than relying on indirect radiation, convection, or thermal conduction. Induction cooking allows high power and very rapid increases in temperature to be achieved: changes in heat settings are instantaneous.

<span class="mw-page-title-main">Electric stove</span> Stove with an integrated electrical heating device to cook and bake

An electric stove, electric cooker or electric range is a stove with an integrated electrical heating device to cook and bake. Electric stoves became popular as replacements for solid-fuel stoves which required more labor to operate and maintain. Some modern stoves come in a unit with built-in extractor hoods.

<span class="mw-page-title-main">Solar cooker</span> Device for cooking with the heat of sunlight

A solar cooker is a device which uses the energy of direct sunlight to heat, cook or pasteurize drink and other food materials. Many solar cookers currently in use are relatively inexpensive, low-tech devices, although some are as powerful or as expensive as traditional stoves, and advanced, large scale solar cookers can cook for hundreds of people. Because they use no fuel and cost nothing to operate, many nonprofit organizations are promoting their use worldwide in order to help reduce fuel costs and air pollution, and to help slow down deforestation and desertification.

<span class="mw-page-title-main">Sous vide</span> Cooking method using prolonged low temperatures

Sous vide, also known as low-temperature, long-time (LTLT) cooking, is a method of cooking invented by the French chef Georges Pralus in 1974, in which food is placed in a plastic pouch or a glass jar and cooked in a water bath for longer than usual cooking times at a precisely regulated temperature.

<span class="mw-page-title-main">Cooked rice</span> Steamed or boiled grain

Cooked rice refers to rice that has been cooked either by steaming or boiling. The terms steamed rice or boiled rice are also commonly used. Any variant of Asian rice, African rice or wild rice, glutinous or non-glutinous, long-, medium-, or short-grain, of any colour, can be used. Rice for cooking can be whole grain or milled.

<span class="mw-page-title-main">Cooker</span> Index of articles associated with the same name

Cooker may refer to several types of cooking appliances and devices used for cooking foods.

<span class="mw-page-title-main">Scorched rice</span> Crunchy, slightly browned cooked rice

Scorched rice, also known as crunchy rice, is a thin crust of slightly browned rice at the bottom of the cooking pot. It is produced during the cooking of rice over direct heat from a flame.

<span class="mw-page-title-main">Thermal cooking</span>

A thermal cooker, or a vacuum flask cooker, is a cooking device that uses thermal insulation to retain heat and cook food without the continuous use of fuel or other heat source. It is a modern implementation of a haybox, which uses hay or straw to insulate a cooking pot.

<span class="mw-page-title-main">Multicooker</span> Automated cooking appliance

A multicooker is an electric kitchen appliance for automated cooking using a timer. A typical multicooker is able to boil, simmer, bake, fry, deep fry, grill roast, stew, steam and brown food.

<span class="mw-page-title-main">Rice-cooking utensils</span>

Rice-cooking utensils are tools used for cooking rice and similar foods.

<span class="mw-page-title-main">Food warmer</span>

A food warmer is typically a table-top device used to maintain the serving temperature of prepared food. It is used both in homes and restaurants.

References

  1. 1 2 3 4 5 6 Ewbank, Anne (31 July 2020). "The Battle to Invent the Automatic Rice Cooker". Atlas Obscura. Archived from the original on 9 May 2023. Retrieved 5 June 2023.
  2. 【プロダクトヒストリー】炊飯器~連続沸騰で美味しさが進化~ (in Japanese). Tokuma Shoten. 20 November 2016. Archived from the original on 7 July 2022. Retrieved 5 June 2023.
  3. 1 2 3 4 5 "Toshiba Firsts Of Their Kind". Toshiba Corp. Museum. Archived from the original on 2011-10-05. Retrieved 2010-03-14.
  4. "自動炊飯器の歴史". Okayama Prefectural Library. Archived from the original on 5 June 2023. Retrieved 5 June 2023.
  5. 1 2 "IH Jar Rice Cooker: The Special Duty-Free Website Toshiba Living Doors". www.toshiba-lifestyle.co.jp. Archived from the original on 25 April 2023. Retrieved 5 June 2023.
  6. 1 2 3 4 日本初の自動式電気釜 (in Japanese). Toshiba Science Museum. Archived from the original on 20 March 2023. Retrieved 5 June 2023.
  7. 1 2 3 4 Katsumi Kimura (29 March 2006). 台所革命!世界初の電気炊飯器の誕生物語2 (in Japanese). All About, Inc. Archived from the original on 21 August 2015. Retrieved 5 June 2023.
  8. 1 2 3 Katsumi Kimura (29 March 2006). 台所革命!世界初の電気炊飯器の誕生物語3 (in Japanese). All About, Inc. Archived from the original on 25 July 2021. Retrieved 5 June 2023.
  9. US USD984195S1,Mao, Tan,"Electric rice cooker",published 2023
  10. 1 2 "Rice Cooker Basics". How Stuff Works. 4 April 2008. Retrieved 10 February 2019.
  11. ars.usda.gov Agriculture Research, May 2002
  12. Kate Hilpern (21 September 2018). "9 best multi-cookers". The Independent. Retrieved 10 February 2019.
  13. Gabrielle Taylor (5 September 2013). "How to Cook Food Perfectly at Home with a Super Cheap DIY Sous Vide Machine". Food Hacks. Retrieved 10 February 2019.
  14. Daniel (July 2020). "It's not the heat, it's the humidity: Effectiveness of a rice cooker-steamer for decontamination of cloth and surgical face masks and N95 respirators". American Journal of Infection Control. 48 (7). Retrieved 12 July 2023.

Further reading