Microwave ovens are kitchen appliances that use microwave to heat food. Microwave stoves use high-frequency microwave radiation to heat food by causing molecular vibrations in food. Microwave ovens can heat up various types of food, including solids, liquids and gases。
Detailed description of microwave working principles
The working principles of the microwave are based on microwave and molecular vibrations. Microwave is an electromagnetic wave with a frequency normally around 2. 45 ghz. These electromagnetic waves are generated by magnetic tubes in microwaves and are transmitted through metal wave tubes in microwaves. When these electromagnetic waves encounter food, they are absorbed by water molecules in the food。
When microwave radiation is absorbed by food, water molecules begin to vibrate. Due to friction between these molecules, such vibrations can lead to an increase in the temperature of food. Microwave radiation can only be absorbed by water molecules in food, so that only food with moisture can be heated by microwaves。
Magnetic controls in microwaves are used to generate microwave radiation. It consists of a cathode and an anode, which, when electrons pass through the magnetic field, form a ray of radiation in the magnetic field that spreads along the wave catheters and produces microwave radiation。
There is also a reflector in the microwave, whose role is to return the microwave reflection back to the microwave to ensure that the microwave is distributed evenly into food. The microwave oven also includes a wheel that is used to evenly expose food to microwave radiation so that it can be heated evenly。
The working method of the microwave is simple but effective. It can heat food to very high temperatures in a short period of time, thus saving cooking time and energy。
The safety of the microwave is also of great concern. Since microwave radiation can only be absorbed by water molecules in food, only food can be heated. Metal components in microwaves reflect microwave radiation and are therefore not heated. In addition, the microwave ovens are equipped with safety switches and heat-sensitive detectors to ensure that the temperature inside the furnace does not exceed the safe range and that the doors cannot be opened during cooking。
Microwave extension
The invention of the microwave
The invention of the microwaves dates back to the second world war. In 1945, when a radar engineer was studying the new magnetic tube of radar, he found that the chocolate bar in his pocket had melted. He then found that this was because his magnetic controls were producing microwave radiation, which was absorbed and heated his chocolate. His discovery led to the invention of the first microwave。
Advantages and disadvantages of the microwave
The advantages of microwaves are rapid, efficient and convenient. It can heat food up to the required temperature in a few minutes, thus saving cooking time. It is also more energy-efficient than the traditional oven, because it only heats the food, not the whole oven. In addition, microwave stoves can cook food without stoves, which is convenient for small households without stoves。
The disadvantage of the microwave is that it is not able to cook yellow, gold-coated food, such as roasted chicken, bread and cake. In addition, microwave heating is less uniform than the traditional ovens, which means that special care is required in cooking certain foods to avoid burns or roasting。
Let's wrap this up
Microwave ovens are kitchen appliances based on microwave and molecular vibrations, which can heat up various types of food quickly, efficiently and easily. Microwave stoves work in a simple but effective manner and are also of great security concern. Although microwave ovens are not evenly heated as traditional ovens, and cannot bake yellow, corrugated foods, their advantages are widely recognized as one of the essential appliances of modern households. In addition, the functions of the microwave are expanding as science and technology progress. In addition to heating and unfreezing food, modern microwaves can perform a variety of tasks such as roasting, steaming, cooking, blowing and baking. High-end microwave stoves are also equipped with touch screens, sensors, ovens and toasters to provide users with more convenience and choice。
In addition to being used at home, microwaves are widely used in the commercial sphere. For example, in restaurants and fast-food restaurants, microwave stoves can be used for fast defrozen and heated food. In hospitals and nursing facilities, microwave stoves can be used to prepare food that is easy to chew and digest, as well as to provide heating food for malnourished patients。
In general, the microwave is an efficient, convenient and secure kitchen electrical, and its work is based on microwave and molecular vibration principles. Although microwaves have some limitations, their advantages still make them one of the essential appliances in modern home and business settings。
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