Microwave oven (microwave oven/microwave oven), as its name implies, is a modern cooking stove that uses microwave to heat food.

Microwave is an electromagnetic wave. The microwave oven consists of power supply, magnetron, control circuit and cooking cavity. The power supply provides a high voltage of about 4000 volts to the magnetron. Under the excitation of the power supply, the magnetron continuously generates microwaves, which are coupled into the cooking cavity through the waveguide system. There is a rotatable agitator near the entrance of the cooking cavity. Because the agitator is a fan-shaped metal, it can reflect microwaves in all directions after rotation, so it can evenly distribute microwave energy in the cooking cavity, thus heating food. The power range of microwave oven is generally 500 ~ 1000 watt.

Microwave oven is a cooking appliance that uses food to absorb microwave energy in microwave field and heat itself. The microwave generated by the microwave generator in the microwave oven establishes a microwave electric field in the cavity of the microwave oven, and certain measures are taken to make this microwave electric field distributed as evenly as possible in the cavity of the microwave oven. Food is put into this microwave electric field, and the cooking time and microwave electric field intensity are controlled by the control center to carry out various cooking processes.

Extended data:

Microwave is a kind of high-frequency electromagnetic wave, which does not generate heat itself. There are microwaves everywhere in the universe and nature, but there are microwaves in nature. Because they are scattered and not concentrated, it is impossible to heat food. Microwave ovens use their internal magnetrons to convert electric energy into microwaves, which penetrate food at an oscillation frequency of 2450MHz. When microwave is absorbed by food, polar molecules in food (such as water, fat, protein, sugar, etc. ) is attracted to oscillate rapidly at a speed of 2.45 billion times per second. The macroscopic manifestation of this oscillation is that food is heated.

References:

Baidu encyclopedia-microwave oven