What is the reason why rice cooker cooks so slowly?

It's the low voltage.

Avoiding peak electricity consumption is the best way to save electricity. The same power of the rice cooker, when the voltage is 10% below its rated value, it is necessary to extend the power time of about 12%, the peak of electricity consumption is best not to use or use less.

Just connect the power plug of the rice cooker in the lamp or lamp socket. Because the general lamp wire is thin, small current-carrying capacity, and easy to deteriorate, or dissolve in the heat. The rice cooker's power is larger, the current is also large, will make the lamp line heat, wire skin melting, resulting in electric shock or fire and other accidents.

Common low-end rice cookers generally use the bottom heating plate technology, through the bottom of the pot heating plate heating, and then transfer the heat to the bottom of the inner liner to cook rice. Such a heating method from the bottom to the upper part of the conduction, not only slow warming, but also the heat and its uneven, more can not be done to accurately control a variety of parameters. None of the traditional advantages of wood-fired cooking have been inherited.

Expanded:

If you are cooking rice directly from dry rice, heat it slowly first to allow the water to warm up slowly. As long as the water temperature rises to the pasteurization temperature of starch, the rice has fully absorbed water, it is the same as the role of soaking in advance. After that, the temperature continues to rise, complete starch pasting, you can also get a good taste of rice.

Of course, this operation requires considerable experience to grasp the "fire": if the temperature is too fast, the outer layer of the rice grains completed the paste, while the inner layer of the expansion of the water absorption is not enough, even if it is not sandwiched between the rice, the rice grains will also be soft and hard, the texture is not good; and if the temperature is too slow, but also lead to the time needed to cook the rice is too long.

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