Microwave radiation can indeed cause harm to the human body, mainly through three types: thermal effect, electromagnetic effect, and cumulative effect.

Thermal effect means that the water molecules in the human body rub against each other to generate heat after being exposed to microwave radiation, causing the body's temperature balance function to be imbalanced and prone to adverse symptoms such as headaches, dizziness, dry eyes, eye aches, and chest tightness. Experiments have shown that women who are exposed to microwave generators for a long time are prone to menstrual cycle disorders and disrupt the ovulation process; pregnant women who are exposed to microwave heat for a long time in the early stages or before pregnancy are prone to fetal malformations.

The electromagnetic effect means that microwaves can destroy the balance of the weak electromagnetic field of the human body, thereby causing damage to the human body. Experiments have shown that electromagnetic radiation will cause a decrease in the percentage of bacteria phagocytized by human white blood cells and the number of engulfed bacteria. It should be noted that electromagnetic waves emitted by mobile phones or WiFi signals can also produce electromagnetic effects on human organs and tissues.

The cumulative effect refers to the fact that after microwave thermal effects and electromagnetic effects act on the human body, the damage to the human body has not yet repaired itself. If it is exposed to microwave radiation again, the degree of damage will accumulate, and it will become a permanent illness over time. , life-threatening.

It is said that microwave ovens are no longer used in developed countries such as Europe and the United States because microwave ovens may cause cancer. Is this true?

Microwave ovens are widely used heating appliances in countries around the world, whether in school cafeterias, restaurants, hotels or homes. my country is the world's largest microwave oven processing industrial area, manufacturing country and exporter. Currently, more than 80% of the world's microwave ovens are processed and manufactured in China. According to China's microwave oven export data released by the National Bureau of Statistics and the General Administration of Customs, China exported 44.86 million microwave ovens in 2014, most of which were sold to developed countries and regions such as Europe, North America, and Australia.

Microwave radiation value is closely related to distance. The closer you are, the greater the radiation. Is this true?

We use an electromagnetic radiation tester to test the radiation value of a normally working microwave oven: when close to the surface of the appliance, the microwave leakage is 0.08mW/cm2; at a distance of 4mm from the surface of the appliance, the microwave leakage is 0.07mW/cm2; at a distance of 10cm from the furnace door, the microwave leakage is 0.04mW/cm2; at a distance of 30cm from the furnace door, the microwave radiation is 0.01mW/cm2; at a distance of 33cm from the furnace door, the microwave radiation is 0mW/cm2. The current international standards and Chinese national standards for microwave leakage of microwave ovens normally limit values ??to 5mW/cm2.

This set of data shows that microwave leakage can only occur around the door, and microwave radiation attenuates quickly with distance. When using a microwave oven, consumers should try to stand one meter away from the microwave oven, so as to effectively avoid the harm caused by microwave radiation.

It is said that the national standards for microwave radiation limits for microwave ovens are "loose" than international standards. Is this true?

At present, the International Electrotechnical Commission IEC has formulated safety requirements for microwave ovens. The limit of microwave leakage in normal working conditions is 5mW/cm2, and in abnormal conditions (such as no food in the empty cavity) is 10mW/cm2. .

my country's current national standard GB 4706.21-2008 "Special Requirements for the Safety of Microwave Ovens for Household and Similar Electrical Appliances, Including Combination Microwave Ovens" stipulates that at any point 50mm or more from the outer surface of the microwave oven, microwave leakage shall not occur. More than 5mW/cm2.

Tracking data from type tests and national product quality supervision and spot inspections in recent years shows that the microwave leakage of microwave ovens on the Chinese market under normal conditions and abnormal conditions are far less than the limits stipulated in mandatory national standards.

When you eat food cooked in a microwave oven, the radiation absorbed by the food during the adding process will be automatically absorbed by the human body. Is this true?

Microwaves are absorbable, and the principle of microwave cooking is to use microwaves to cause frictional heating of food water molecules. From the perspective of the law of conservation of energy, the electromagnetic energy emitted by microwaves has been converted into heat energy during the cooking process. Microwaves will not be stored in food, so there is no problem of being absorbed by the human body.

If you can smell food when cooking food in a microwave oven, it means that the seal of the microwave oven is not tight, which will cause microwave leakage. Is this true?

To prevent microwave leakage, it is not mainly achieved by sealing, but by the anti-flow device on the furnace door structure. From a physical point of view, the microwave frequency generated by a microwave oven is 2450MHz and the wavelength is about 12cm. The diameter of the metal hole in the observation window of the microwave oven door does not exceed 0.3cm, and the door seal fitting gap does not exceed 0.5cm. So theoretically, It is impossible for microwaves to "pass" through the microwave oven cavity door.

Reliable Tips

When purchasing, first check whether there is a CCC certification mark on the product.

The furnace door should be opened and closed lightly and avoid hitting the furnace door with heavy objects.

When the microwave oven is working, personnel should try to stay 1m away from the microwave oven, and do not put their eyes within 5cm of the microwave door observation window to watch the microwave oven work.

Metal and enamel products cannot be used in microwave cooking utensils, because metal reflects microwaves, which not only affects the heating of food, but also causes sparks to be generated in contact between microwaves and metal, which is dangerous.

"China Quality News"