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This article is about automated rice-cooking appliances. For less automated methods of cooking rice, see rice-cooking utensils . For the car and motorcycle term, see Rice burner
Electric induction rice cooker with scoopA 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.
The term rice cooker formerly applied to non-automated dedicated rice-cooking utensils, which have an ancient history (a ceramic rice steamer dated to 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: &#;&#;&#;, literally, "boil-rice-device").[1]
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A 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 , 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 s and early s, 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, [5][6][7] (or [3]), was the world's first automatic electric rice cooker for home use. It was developed by Toshiba's Shogo Yamada beginning in and completed in 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 , 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 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 , a rice cooker with a heat-retention function was introduced, and in , an electronic rice cooker equipped with a microcomputer that could also manage the soaking of rice after washing and the heat level. In , rice cookers with electromagnetic induction heating were introduced, which provided higher heating.[8]
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Traditional rice cooker commonly used in the Netherlands by residents of the former Dutch East Indies (now: Indonesia) in the s. Showcase on display at the Eurasian festival Tong Tong Fair . A typical commercial gas cooker. To use it, the left lever is depressed to ignite the pilot burner for stand-by 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 operationA 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
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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]
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Steam rice cookers have been shown to be effective for decontamination of face masks.[14]
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Air dryer heater elements are an efficient and reliable piece of technology that can be used in a variety of household appliances, including rice cookers. By harnessing the power of air flow manipulation, these heating elements can help cooks create perfectly cooked rice each time they use their cooker.
One of the key benefits of using air dryer heater elements in rice cookers is their ability to quickly and evenly distribute heat throughout the cooking process. Unlike traditional heating elements, which may rely on concentrated heat sources, air dryer heater elements spread the heat out over a larger surface area, ensuring that the rice is cooked through evenly. This means that regardless of the size or shape of the cooker, the rice will cook evenly and be ready to serve in no time.
Another benefit of using air dryer heater elements in rice cookers is their energy efficiency. These heating elements are designed to use less energy than other types of heating elements, helping to keep energy bills low while still providing reliable cooking performance. This efficiency also helps to reduce carbon emissions, making air dryer heater elements a great choice for environmentally conscious cooks.
Finally, air dryer heater elements are incredibly reliable and long-lasting, providing years of dependable service to rice cooker users. With regular maintenance and care, these heating elements can continue to provide quick and efficient heating for many years to come, making them a valuable investment for any kitchen.
In conclusion, air dryer heater elements can be an excellent choice for rice cooker users looking for fast, even, and energy-efficient cooking performance. With their reliable and long-lasting design, these heating elements are a great investment for anyone looking to upgrade their cooking equipment. So why not consider an air dryer heater element for your next rice cooker purchase and experience the benefits and conveniences it has to offer?
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