The microwave oven, which was once a smash hit, is now almost zero in "existence"? Is it time to be eliminated?
Release time：2023-03-23 10:55:26 source：korpimaankyynel.com author：Desert resources
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The microwave oven, which was once a smash hit, is now almost zero in "existence"? Is it time to be eliminated?
Microwave ovens are no longer popular, and home appliances that once filled the entire supermarket are not necessarily bought at discounted sales. It's like a smash hit star who suddenly becomes blurred, and few people intervene. Convenient and practical microwave ovens However, microwave ovens have not been eliminated. They are sold in major home appliance stores, and some of them are not cheap. Why do microwave ovens run out of gas, and should it be obsolete? Microwaves are dead
The popularity of microwave ovens
Microwave ovens are a product of World War II, but unlike those used in the military, microwave technology was discovered purely by accident . At that time, Spencer, a radar engineer in the United States, found that the chocolate in his pocket had melted. At first, he thought that the chocolate was too close to the body to be melted by body temperature. But as the weather got colder and he wore thicker and thicker clothes, the chocolate still melted, and he later discovered that it was the radar waves of his work environment that had heated the chocolate. After his research, the world's first microwave oven was produced in the United States in 1947, but at this time it was called a "radar oven". The earliest microwave ovens were called "radar ovens" because of the smell of war. The common people who experienced World War II were very disgusted with the name, so they were changed to microwave ovens. Since the 60th century, microwave ovens have entered thousands of households and become the first choice of many families. It can heat food without fire and is considered safer. Microwave ovens entered my country in the 1980s, and became popular in the millennium, becoming a must-have home appliance for every household. Home microwave ovens and with the upgrading of products, microwave ovens with heating, roasting and steaming functions have appeared one after another, and the types of microwave ovens on the shelves are also dazzling. There is a saying called "people are popular right and wrong", the microwave oven was very popular, and various sayings about it also followed. The most famous of these are "microwaves emit radiation" and "microwave-heated food causes cancer." So, are these two statements true or false? Whether the microwave oven has radiation It's scary, and I can't help but think of radiation. In fact, microwave is a general term for electromagnetic waves with frequencies in the range of 300MHz to 300GHz, which originally belonged to the radar band. Whether the wave is harmful to the human body depends on its frequency. For example, the frequency of visible light is between 380 and 750THz. Will people cause cancer because of being illuminated by light? The frequency of ultraviolet rays is 750THz ~ 30PHz, which is often used for sterilization. It can be seen that electromagnetic waves of this frequency will cause certain damage to the organism. Popto, the most terrifying gamma ray in the universe, has a frequency of more than 30EHz, not to mention people, some celestial bodies cannot withstand a gamma ray burst. Now look at the microwave, do you still find it scary? If we look closely, our food is composed of many molecules. When the molecules absorb microwaves, they vibrate at a speed of 2.45 billion times per second. Such vibrations are fast enough for the molecules to generate heat and penetrate deep into the food to heat it up. The natural frequency of some molecules in the vibration of water molecules is close to the frequency of microwaves, so they will resonate with microwaves, and the energy generated will reach the maximum. This is why some foods are easy to reheat and others take a long time to reheat. But this also brings a disadvantage, the water molecules in the food will be lost as a result, if the food itself contains enough water, then it is not a problem. However, if the food itself has less water content, it will become drier and drier if the water molecules are reduced by such vibration. Microwave ovens get drier and drier. Will food heated by microwave ovens cause cancer? Generally speaking, fried, pickled, and heavily salted (especially nitrite) foods are more likely to cause cancer. Microwave ovens are only responsible for heating food, and it does not determine the properties of the food itself. Moreover, the temperature of heating food in microwave ovens is generally around 100°C, and the temperature of baking can reach around 200°C. These temperatures are not too high, and are similar to the temperatures we usually cook. If heating food in the microwave can cause cancer, so will the food we cook on weekdays. The temperature of boiling water is 100 degrees. The structure of the microwave oven is actually not very complicated. It has a microwave transmitter inside, which is the heart of the microwave oven, which is specially responsible for emitting microwaves to heat food. In addition, there are some diversified microwave ovens with electric wire, which are specially used for baking. Microwaves have strong penetrating ability, but cannot penetrate metal, so when using microwave ovens, metal containers cannot be used. Having said so much, is microwave oven really harmless? Of course not, there are no perfect things in this world, and microwave ovens themselves have great limitations. Metal containers cannot enter the microwave ovenLimitations of microwave ovens
Microwave ovens have very high requirements on containers. Many people think that as long as non-metallic containers are put in, they can. There are many containers that cannot be placed in the microwave. For example, plastics that are not resistant to high temperature, ceramics not specially designed for microwave ovens, glass not specially designed for microwave ovens, and paper products. This has led to many people buying a microwave oven and having to buy another set of pots and pans specially designed for microwave ovens. What's more, not all food can be heated. Some scientists have done an experiment. They put two grapes next to each other in the microwave oven, and they exploded. The heating method of the microwave oven is uneven. It starts from the outermost part and then goes to the innermost part. Of course, the molecule does not vibrate from the outermost every time, and sometimes it will heat from the inside out like a sheep placenta. There are also problems with the speed of heating in different parts of the same food, such as raw eggs, whose inner egg liquid vibrates more easily than the outer egg shell, because the egg liquid contains water molecules. As a result, the inside of the egg began to heat, and the outer shell did not move, causing the egg to become a "fried egg", and finally the inside of the microwave was exploded with egg liquid everywhere. This problem also exists when heating raw eggs in the microwave to heat braised meat. Fat meat vibrates faster than lean meat. If you listen carefully, you will hear the sound of gravy exploding in the microwave. Opened the microwave and it was splashed with oil everywhere. The heating space of the microwave oven should be cleaned regularly, otherwise food residues will accumulate in it and breed bacteria. Because of the frequency, microwaves can kill some bacteria, but the disinfection effect cannot keep up with ultraviolet rays. Don't think that there are no bacteria on the inner wall of the microwave oven. The original intention of most families to buy microwave ovens is to heat meals and dishes. With the update of home appliances and changes in people's living habits, microwave ovens have gradually fallen out of favor. Microwave food residuereplaced microwave oven
In the early days people bought microwave ovens for convenience when heating dishes, because before there were no microwave ovens, everyone had to use them to reheat food Steamer. In that era, the use of a steamer had to ignite the stove, which was very dangerous for children. Microwave ovens can effectively prevent open flames, and can be used by the elderly and children. However, some merchants have invented an electric steamer, which does not require an open flame and uses electric heating. The principle is the same as that of a rice cooker, which also eliminates the use of an open flame. Another point is that people eat less and less time for leftovers, especially with the accelerated pace of life, the rise of the catering industry and the takeaway industry, and less and less time to eat at home. In the past, many people bought a microwave oven and found that it was rarely used. If you really want to heat something, you can buy another electric steamer, which can not only heat food, but also steam other food. More importantly, the radiation and cancer-causing rumors of microwave ovens hit the industry hard. Many people who didn't know the truth did not plan to buy microwave ovens because they were afraid. With the change of dynasties in the electrical appliance market, electric ovens, air fryers, etc. have come out one after another. After half a century of glory, microwave ovens have gone into decline. Electric steamer So, are microwave ovens really obsolete? Although the microwave oven has fallen out of favor, it has not been completely eliminated by the market. There are still a group of people using microwave ovens, and microwave ovens are also sold in major supermarkets. The current sales of microwave ovens are definitely not as good as those of the millennium, but the number of people buying them has not reached the point where they are still available. Some large companies still have demand for microwave ovens, so they will continue to produce them. In fact, looking at the electrical appliances we use, most of them have not been eliminated. They have either been remodeled and transformed into other appearances, or they have been updated with better performance. There are still families who use microwave ovens and microwave ovens who have written a great deal in the human kitchen, and they will not withdraw from the stage of history so easily.- Last：A strange fish appeared in a lake in Henan, and it took a month to catch it. Why is it so difficult to catch it?
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