It breaks the heating principle that the traditional cooking method uses magnetic field to induce current (also called eddy current). The induction cooker generates an alternating magnetic field through an electronic circuit board. When the iron-containing pot bottom is placed on the kitchen surface, the pot bottom cuts the alternating magnetic field lines, and an alternating current (i.e. eddy current) is generated in the metal part of the pot bottom. The eddy current makes the free electrons in the iron material at the bottom of the pot move alternately in a vortex way, and the bottom of the pot is made of Joule heat of current (p = I 2 * r). (Therefore, the heat source for cooking by the induction cooker comes from the bottom of the pot instead of the induction cooker itself, so the thermal efficiency is nearly 1 times higher than that of all cookers), so that the cookers themselves can heat up and cook food at high speed, thus achieving the purpose of cooking. It has the advantages of rapid temperature rise, high thermal efficiency, no open flame, no smoke, no harmful gas, no thermal radiation to the surrounding environment, small size, good safety and beautiful appearance, and can complete most cooking tasks in the family. Therefore, in some countries where induction cookers are more popular, people call them "the god of cooking" and "green cookers".
Because the induction cooker is heated by the eddy current generated by the magnetic field directly induced at the bottom of the pot, it is necessary to choose an iron (stainless steel) cooker that meets the design load requirements of the induction cooker. Cookware made of other materials will start automatic protection due to abnormal load of induction cooker caused by too large or too small material resistivity, and it will not work normally. At the same time, because iron fully absorbs the magnetic field, it has a very good shielding effect and reduces a lot of magnetic radiation, so the iron pot is safer than any other cooker. In addition, iron is a substance that is beneficial to human health, and it is also a necessary element for human body to take in for a long time.
The induction cooker is mainly composed of two parts: the electronic circuit part and the structural packaging part.
Main features:
1. The induction cooker generates a low-frequency (20~25KHZ) alternating magnetic field under the action of a control circuit, generates a large number of dense eddy currents through a magnetic (iron) pot, and at the same time converts the induced current into heat to heat food, so the energy efficiency is extremely high.
2. Be sure to use iron, special stainless steel or iron-baked enamel pots with a bottom diameter of 12~26 cm.
3. The induction cooker is equipped with a thermostat to prevent overheating, save electricity and be safe.
According to the power of induction cooker, it is divided into induction cooker and commercial induction cooker. According to the classification of furnace ends, induction cookers can be divided into single-head furnaces, double-head furnaces, multi-head furnaces and one electric gas.
The advantages of induction cooker are: multifunction, cleanliness, safety, convenience and economy; The disadvantage is that the cooker requires a flat bottom, and the stepless adjustment of firepower is not realized.