Principle of microwave oven
Simply put, the magnetron of a microwave oven converts electric energy into microwave energy. When the magnetron emits microwave energy at a frequency of 2450MHZ, the water molecules placed in the cavity of the microwave oven oscillate at a frequency of 2.45 billion kilocycles per second, and the core component for generating high-frequency electromagnetic fields is the magnetron. Food molecules vibrate in a high-frequency magnetic field, and the molecules collide with each other to generate heat energy, which causes food to be heated. Microwave ovens use this heating principle to cook food.
Harm of microwave oven
Hazards of microwave ovens 1. electromagnetic radiation
The electromagnetic radiation hazard of microwave oven is a kind of hazard that people are most concerned about now. We know that many electrical appliances in life are harmful, such as computers. But in fact, the electromagnetic radiation harm of microwave oven is not less than that of computer, especially for pregnant women. Generally speaking, if a person is exposed to strong electromagnetic radiation for a long time, there may be a series of very serious consequences:
1, poor embryo development, abortion and teratogenesis rate of pregnant women are also important reasons for prohibiting pregnant women from using it.
2. The incidence of malignant tumor is increasing. We know that long-term radiation will lead to canceration of some cells, which will lead to an increase in the incidence of malignant tumors.
3. Decreased resistance, especially for children, will lead to slow growth and development.
4, it will make people nervous, and then there will be symptoms such as headache, insomnia and arrhythmia.
5, leading to infertility.
Harm of microwave oven II. Food hazards
A large number of scientists in Switzerland and the former Soviet Union have done experiments with microwave ovens and found that the food processed by microwave ovens will produce new toxic and even carcinogenic compounds. A large number of experiments by scientists have proved that people who use microwave food for a long time are prone to disorder of their lymphatic system, and the number of cancer cells in their blood increases, which greatly increases the probability of cancer, such as gastrointestinal cancer.
Harm 3 of microwave oven. Nutrient loss
Through a large number of experiments, it is found that the nutritional value of food processed by microwave is reduced by 60% to 90%, mainly minerals, vitamin B, vitamin C, biochemical enzymes, etc., and even the nutritional components in protein are reduced a lot.
The harm of microwave oven. bodily injury
Experts have repeatedly found that long-term consumption of microwave food will also cause abnormal secretion of hormones in men and women, and lead to permanent brain damage, leading to memory loss, inattention, mood swings, mental decline, heart disease and so on.
How to use the microwave oven-how to use it
1. Before using the microwave oven, please read the instructions provided by the manufacturer carefully, understand your microwave oven and accept the instructions. If the power supply is insufficient, the light in the furnace will appear dim. If you continue to use it at this time, it will damage the safety equipment and you should stop using it immediately.
2. The microwave oven should be placed in a ventilated place, and there should be no magnetic substances nearby, so as not to interfere with the uniform state of the magnetic field in the furnace cavity and reduce the working efficiency. The microwave oven should be flat, away from fire and faucet. Do not cover the vents behind or on both sides of the furnace. It is best to keep a distance of at least 5 cm (2 inches) from the wall so that the hot air can be easily dissipated.
3. When using the rotary microwave oven, the food container must be placed in the special plate of the microwave oven, not directly in the oven cavity. If the whole bag of food is attached with a metal clip, it should be removed first, and the metal strip of the plastic cooking bag should be tied tightly, so it is not suitable for use. If sparks appear in the furnace, stop the furnace immediately.
4. After the food is put in, close the oven door and ensure that the interlock switch and safety switch are closed. When heating, people should stay away from the microwave oven or at least away from the microwave oven 1 m to reduce radiation.
5. After the microwave oven is turned off, it is not advisable to take out the food immediately, so that there is still residual heat in the oven and the food can continue cooking. /kloc-it's better to take it out after 0/minute.
6. After each use, wipe the inner wall of the furnace and the turntable with a wet towel, then wipe off all the moisture with a dry towel, open the oven door for a moment, and ventilate and dissipate heat. Clean the door crack and hinge, and don't leave anything new that will cause the oven door to fail to open and close and leak radiation.
How to use the microwave oven-precautions for use
1, microwave heating requires the use of special containers.
Ordinary plastic containers, metal containers, closed containers, heat-resistant containers, etc. Not suitable for microwave ovens, but containers for food need special microwave ovens.
2. The heating time should not be too long.
Over time, food will harden, lose its fragrance, color and taste, and even produce toxins. Therefore, if food is thawed or heated in the microwave oven, if you forget to take it out, if it takes more than 2 hours, you should throw it away to avoid food poisoning.
3. Fried food should not be heated.
Because high-temperature oil will splash and cause fire, in case of accidental fire in the furnace, never open the door, turn off the power first, and then open the door to cool down after the fire is extinguished.
Don't heat the food without water in the microwave oven.
Because the microwave oven itself does not generate heat, but emits microwave radiation to food, the polar molecular water in food moves. The interaction between adjacent molecules produces a phenomenon similar to friction, which makes the water temperature rise, so the temperature of food also rises. Putting food without water in the microwave oven will make the microwave oven unable to work, resulting in damage to the microwave oven.
5. If the oven door, door seal, hinge and shell of the microwave oven are damaged due to collision or falling.
Please don't continue to use it. It can only be used after being overhauled by professional maintenance personnel.