working principle
basic introduction
It breaks the heating principle of the traditional open flame cooking method using magnetic field induced current (also known as eddy current). The induction cooker generates alternating magnetic field through the components of the electronic circuit board, and when the furnace surface is placed with the bottom of the iron containing pot, the cookware That is, the alternating magnetic field lines are cut and an alternating current (ie, eddy current) is generated in the metal portion at the bottom of the pot, and the eddy current causes the free electrons in the iron material at the bottom of the pot to spirally move, and the Joule heat through the current (P=I) ^2*R) causes the bottom of the pan to heat up. (Therefore: the heat source of the induction cooker comes from the bottom of the pot instead of the heat of the induction cooker itself, so the heat efficiency is nearly double that of all cookware.) The appliance itself is heated at high speed for heating and cooking. Food to achieve the purpose of cooking. It has the advantages of fast heating, high thermal efficiency, no open flame, no smoke, no harmful gas, no heat radiation to the surrounding environment, small size, good safety and beautiful appearance, and can complete most cooking tasks of the family. Therefore, in some countries where induction cookers are more popular, people are known as "the god of cooking" and "green stoves."
Since the induction cooker generates heat by directly inducing a magnetic field from the bottom of the pot to generate heat, it is necessary to use iron (stainless steel) cookware that meets the design load requirements of the induction cooker. The cookware of other materials may cause the load of the induction cooker due to the material resistivity being too large or too small. The automatic protection is activated abnormally and does not work properly. At the same time, because the iron absorbs the magnetic field and the shielding effect is very good, which reduces a lot of magnetic radiation, the iron pot is safer than any other material. In addition, iron is a substance beneficial to human health and an essential element for the body to consume for a long time.
work process
When a loop coil is energized, the effect is equivalent to a magnet rod. Therefore, the coil surface has a magnetic field NS pole, that is, there is magnetic flux crossing. If the power source used is AC, the magnetic flux of the coil and the magnetic flux passing through the circuit surface will change.
When a magnetically conductive metal surface is placed over the loop coil, the metal surface induces a current (ie, eddy current), and the eddy current causes the iron atom of the pot to move at a high speed and irregularly, and the atoms collide with each other to generate heat.
The higher the induced current, the higher the heat generated and the shorter the time required to cook. To make the induced current larger, the amount of flux change across the metal surface is also greater, and of course the stronger the magnetic field strength. In this way, the coils that originally passed the alternating current need to be twisted together. Because of the high-intensity magnetic field induction, there is no current generated in the furnace surface, so the furnace surface does not generate high temperature when cooking food. Now the non-cottage version of the induction cooker surface is made of high temperature resistant black crystal plate, which is a kind Relatively safe cooking utensils. During use, because the black crystal plate will come into contact with the pot, local high temperature will occur. Therefore, do not touch the surface of the furnace for a period of time after heating to prevent burns.
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