Microwave ovens are no stranger to everyone. No matter at home or in the office or even in the restaurant, we often see microwave ovens. Microwave ovens have fast heating function. It is convenient to use. We can make breakfast in a few seconds. It is small. It does not occupy too much area. So, it has become a favorite household appliance for many people. However, people often hear about microwave oven explosions. This has led many people to misunderstand microwave ovens. In fact, some users improperly operate microwave oven and cause the explosions. Today we will understand the heating principle of microwave ovens.
Let`s see the general heating principle. It achieves the purpose of heating through heat conduction. Like rice cookers, open flame heating, etc. They transfer heat to low-temperature objects from high-temperature objects. However, this heating method is relatively slow and inefficient. So, the microwave oven appeared.
Microwave ovens heat food by emitting many microwaves. This is the origin of the microwave oven's name. Microwaves have strong penetration. When microwaves irradiate food, they can penetrate the ionosphere. So, people use microwaves to heat it.
The microwave oven has a built-in magnetron. Electrify it, it will emit many microwaves. That is electromagnetic waves. Electric field and magnetic field will continuously change during the electromagnetic wave propagation. Microwave ovens rely on constantly changing electric fields. The fields affect the violent movement of polar water molecules in food. Meanwhile, the thermal movement of water molecules is quickly transferred to the surrounding molecules. So, you can heat the food quickly. In short, the heating principle of microwave oven is actually that food absorbs microwaves to generate natural vibration. It finally generates heat energy.
However, it belongs to the reflection effect. Microwaves cannot penetrate metal substances. Metal utensils absorb some microwaves. This will prevent the microwave from heating food. It also stimulates the metal to generate electric current. If it is serious, it will burn out microwave ovens and utensils and even cause fires. Therefore, when heating food, do not choose metal utensils. On the contrary, microwaves can penetrate non-metallic utensils. Such as glass and porcelain. Moreover, these materials do not absorb microwaves. It can quickly heat food. Sometimes you use microwave oven to heat food. You can select high temperature resistant ceramic and glass products.
Now that we understand the heating principle of microwave ovens. Many people have a new understanding of the use of microwave ovens. Metal utensils cannot heat food. You should pay attention to avoid the use of closed containers. The closed containers can't easily dissipate the heat generated by can't This will lead to high pressure in the container. It is easy to occur explosive accident. There are some shelled foods. For example, you need to puncture the shell of eggs. It can avoid danger.
I hope you can use microwave oven with more confidence after knowing these.
