Toshiba should rank first in technology development, because the world's first commercial rice cooker was launched by Toshiba, and Toshiba has always been the patent and leader of "vacuum pressurization" technology. The great thing about this technology is that vacuum makes rice absorb water evenly and fully, and pressure makes rice soft and fragrant. Although the two functions are physically contradictory, Toshiba successfully solved the problem. Including Sanyo, Tiger brand new voltage regulation technology also originated from Toshiba.
2. Hitachi rice cooker
Hitachi has successfully improved Toshiba's vacuum pressurization, and its preservation technology is also excellent. Now, its high-end pot has added "sealing" technology, and the influence of steam internal circulation on rice. Hitachi pot is not expensive and cost-effective, so many consumers will choose him.
3. Sanyo rice cooker
Sanyo was acquired by Panasonic. Sanyo's main technology is "Yuanzu" voltage regulation technology, euphemistically called "rice dance". In fact, it also comes from Toshiba's pressure adjustment principle when dealing with the contradiction of vacuum pressurization. This simple patent for voltage regulation seems to have been ignored by the Japanese (generally, Japanese people leave their proud rice technology at home, but you can see that high-end vacuum pressure cookers will never be made in China, and now high-end products are not sold to consumers in China). It was cracked by Sanyo's foundry in China a long time ago, and now, brands such as Yilipu, which once worked in China, have this "dancing" product.
4. Tiger Tiger Card
Like the starting point of Xiangyin's feather cauldron, Xiangyin's domestic liner is called "earthen cauldron", which is the rice cooked by reducing firewood and earthen stoves. Xiangyin is a reduced shape, Tiger brand is a reduced material, and the coating of the inner container is made of far-infrared ceramic particles, which is close to the material of the clay pot. At present, Tiger brand has three kinds of pottery pots (pottery pots-corrugated clay pots with excellent heat storage performance) IH rice cookers/? IH rice cooker (the inner container is also earthen pot, but there is no corrugated burning, multi-layer inner container), and then there is ordinary rice cooker (the ordinary metal inner container has relatively few functions, which should be similar to the rice cooker we usually use), mainly natural earthen pot.
5. Mitsubishi Mitsubishi
Mitsubishi's housekeeping product is called "charcoal kettle": the inner container is coated with carbon to restore the taste of firewood and rice as much as possible. Although it is not a pure carbon pot, the overall heating is more uniform than that of a metal pot, with better heat conduction and insulation effect, and the far infrared effect can make water boil evenly and continuously.
7. Elephant seal "Southern Feather Pot"
What is southern ironware? It is actually a traditional handicraft in Morioka City, Iwate Prefecture, Japan. Local "artisans" hand-made all kinds of iron daily necessities, and even each pattern and pattern was carved one by one.
Working principle of rice cooker
1. Structure of ordinary rice cooker: The ordinary rice cooker is mainly composed of a heating plate, a temperature limiter, a thermal insulation switch, a lever switch, a current-limiting resistor, an indicator lamp and a socket.
2 heating plate: this is the main heating element of the rice cooker. This is an aluminum alloy disk with electric heating tubes embedded in it. Put the inner pot on it, and you can see it when you remove the inner pot.
3. Temperature limiter: also called magnetic steel. It is equipped with a magnetic ring and a spring, which can be pressed at the core of the heating plate. When cooking, when the cooking switch is pressed, the magnetic steel attracts the lever switch to keep the power contact connected. When cooking, the temperature at the bottom of the pot keeps rising, and the attraction of the magnetic ring decreases with the increase of temperature. When the water in the inner pot evaporates and the bottom temperature of the pot reaches 103 2C, the attractive force of the magnetic ring is less than the elastic force of the spring on it, and the temperature limiter is pressed down by the spring to drive the lever switch to cut off the power supply.