What is the principle of induction cooker?
Induction cooker is also called induction cooker. An induction cooker uses current to generate a magnetic field through a coil. When the magnetic field lines pass through the bottom of the iron pot, the magnetic field lines are cut, resulting in numerous tiny eddy currents, which make the iron atoms of the iron pot rotate at high speed, generate collision friction and generate heat, thus directly heating the food in the pot.
Induction cookers use magnetic fields to induce eddy currents to heat food. The surface of the induction cooker is a heat-resistant ceramic plate. Alternating current generates a magnetic field through a coil under a ceramic plate. It uses high-frequency current to pass through the annular coil, thus generating countless closed magnetic field forces. When the magnetic field lines pass through the bottom of the magnetic conductor, they will swing for a long time to generate countless tiny eddy currents, which will heat the bottom of the pot and achieve the purpose of heating food.
The induction cooker generates eddy current heating by directly inducing magnetic field at the bottom of the pot.
Therefore, it is necessary to choose an iron pot that meets the design load requirements of the induction cooker. Cookware made of other materials will start automatic protection because of the 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 the iron fully absorbs the magnetic field, the shielding effect is very good, which reduces a lot of magnetic radiation, so the iron pot is safer than any other cooker. In addition, iron is an essential element that the human body needs to ingest for a long time, which is beneficial to health. The hearth of the induction cooker is a high-strength and impact-resistant ceramic flat plate (crystal glass). A high-frequency induction heating coil (i.e. an excitation coil), a high-frequency power conversion device and a corresponding control system are installed on the lower side of the cooktop, and a flat-bottomed frying pan is placed on the cooktop. The current passes through the coil below the ceramic plate to generate a magnetic field. When the magnetic lines in the magnetic field pass through the bottom of an iron pot, stainless steel pot, enamel pot, etc. , produce vortex, so that the bottom of the pot quickly heats up, thus achieving the purpose of heating.
The working process is as follows: the current and voltage are converted into direct current through a rectifier, the direct current is converted into high-frequency alternating current exceeding audio frequency through a high-frequency power conversion device, and the high-frequency alternating current is added to a flat hollow spiral induction heating coil.
Thereby generating a high-frequency alternating magnetic field. Its magnetic field lines penetrate the ceramic platen of the furnace and act on the metal pot. Due to electromagnetic induction, there is a strong eddy current in the pot. When the vortex flows against the internal resistance of the pot, the conversion from electric energy to heat energy is completed, and the generated Joule heat is the heat source of cooking.
Characteristics of induction cooker
The electromagnetic oven is very convenient to use,
Can be used for cooking operations such as boiling, frying, frying, steaming and frying. It has the characteristics of high efficiency, small size, light weight, low noise, energy saving, no environmental pollution, safety and hygiene. Uniform heating during cooking can better maintain the color, aroma, taste and nutritional components of food. It is an indispensable new type electric cooker to realize kitchen modernization. Generally, the power of an electromagnetic cooker is about 700- 1800 W ... The electromagnetic waves generated when the electromagnetic cooker works are completely absorbed by the shielding layer at the bottom of the coil and the iron pot on the top plate, and will not leak, which is absolutely harmless to human health.