The principle of induction cooker is electromagnetic induction, that is, alternating current is used to generate an alternating magnetic field with changing direction through the coil, and eddy current will appear inside the conductor in the alternating magnetic field (please refer to Faraday's law of electromagnetic induction for reasons), which is caused by the eddy current electric field pushing the carriers in the conductor (the electrons in the pot are not iron atoms) to move.
Joule thermal effect of eddy current heats the conductor, so as to realize heating.
Working principle:
Induction cooker is a new type of cooker in the kitchenware market. It breaks the heating principle that the traditional open fire cooking method uses magnetic field to induce current (also called eddy current). The induction cooker generates an alternating magnetic field through the components of the electronic circuit board. When the bottom of the iron pot is placed on the furnace surface.
When the cooker cuts the alternating magnetic field lines, an alternating current (i.e. eddy current) is generated in the metal part at the bottom of the cooker. The eddy current makes the iron atoms of the cooker move irregularly at high speed, and the atoms collide and rub with each other to generate heat energy (so the heat source for cooking in the induction cooker comes from the bottom of the cooker instead of the induction cooker itself to generate heat and conduct it to the cooker).
Therefore, the thermal efficiency is nearly 1 times higher than all cookers. ) The cooker itself heats food at high speed, thus achieving the purpose of cooking food. 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".