With the development of communication industry and household appliances industry, modern people enjoy the convenience brought by modern communication equipment and the comfort brought by electrical appliances, but at the same time, they are exposed to the radiation of more and more electrical appliances and communication equipment. People are exposed to more and more electromagnetic radiation, and common household appliances are also accused of being invisible killers of indoor electromagnetic radiation. How harmful the electromagnetic radiation of household appliances is, and what attitude should be taken to treat and use household appliances, which is paid more and more attention by ordinary consumers.

What is electromagnetic radiation?

We usually use electrical appliances and communication equipment, such as televisions and mobile phones, which generate electromagnetic waves due to the interactive changes of electric and magnetic fields. In the process of electromagnetic propagation, electromagnetic energy also propagates outward, and the phenomenon that this energy propagates through space in the form of electromagnetic waves becomes electromagnetic radiation. At present, electromagnetic radiation has become the fourth largest environmental pollution after water, air and noise, and it has been listed as the pollution that must be controlled by the United Nations Human Environment Conference.

Although all household appliances emit electromagnetic radiation to varying degrees at present, there is still no exact experimental basis for how harmful it is to human body. Generally speaking, electromagnetic fields will interfere with the release and absorption of calcium by cells, leading to the generation of cancer cells. Low-frequency radiation is an important cause of human cancer, reproductive diseases, genetic diseases, Alzheimer's disease and amnesia, and electromagnetic radiation is the most harmful to children. Long-term exposure to electromagnetic radiation will increase the chances of children suffering from cancer.

Radiation intensity of general household appliances

At present, international and domestic specialized institutions are conducting relevant research and experiments. According to the data published by the International Health Organization, we can know the electric field and electromagnetic intensity of daily household appliances.

Judging from the above data, the main household appliances we use every day are power frequency magnetic field radiation exceeding the standard, mainly in hair dryers, vacuum cleaners, electric razors, fluorescent lamps, microwave ovens and so on. Moreover, in many cases, several electrical appliances may be used at the same time, and the magnetic field intensity between them is also cumulative during use. In some informal experiments, many people found the phenomenon of group radiation. "Group radiation will make the radiation frequency band very wide, which will increase the resonance between devices and the superposition of radiation energy. When the energy reaches a certain level, the human body will be affected by thermal effect (the higher the frequency, the more intense it will be), non-thermal effect (full frequency band) and resonance effect (when the wavelength is proportional to the scale of the organism). " This also shows that the influence of radiation is far more extensive than people know.

Scientific use of electrical appliances and prevention of electromagnetic radiation

At present, there is no special electromagnetic radiation standard for household appliances in China, and international standards are generally adopted. There is no corresponding mark and index on the product to explain the radiation degree of the product, and it is even more impossible to compare and judge the radiation degree of the product when purchasing the product. The lack of this information makes consumers lack sufficient understanding of the products, so they can't make normal protection and avoid radiation in use.

Regarding the radiation damage of household appliances, from the current domestic academic point of view and media public opinion, their attitudes are completely different. At present, many media articles also give a general explanation of electromagnetic radiation. The radiation generated by household appliances such as induction cookers and microwave ovens is considered to be relatively weak, far lower than that of communication equipment such as mobile phones, and it is considered to be safe to use. Generally speaking, long-term low-dose exposure to electromagnetic radiation is likely to cause health hazards. Compared with Europe and America and other foreign countries, China has a large population and relatively concentrated residence, and the actual exposure level of the public to electromagnetic radiation is higher than that of Europe and America. Although experts believe that the harm of low-dose radiation is objective from an academic point of view, they suggest that everyone treat the radiation of electrical appliances with a relaxed attitude and use electrical appliances to avoid radiation from a scientific point of view.

Electromagnetic radiation is mainly produced by coils and motors in electrical appliances, and decreases exponentially with the increase of distance, so the best radiation protection method is to stay away from electrical appliances and avoid centralized placement of household appliances. Special people should pay attention to the use of radiation protection facilities when using household appliances, while children should try to stay away from electrical appliances.

Electric radiation is the cool killer at home.

The household electricity bill has been raised since this month, with an increase of nearly 7.6% per kWh. Do you have a basic understanding of the "side effects" of household appliances while calculating how to save electricity?

Household appliances are changing with each passing day, improving the quality of life. Under the market competition, the "innovative" style was launched at the first time. Many "newly sold" products rushed to the market, from design, manufacturing to shelves. What kind of quality control have they passed? To tell the truth, the average consumer is not clear about this, but the point is that there are advanced appliances everywhere in the house, but has anyone seriously thought about the problem of electromagnetic radiation?

Hey, although not everyone has a microwave oven at home, I believe everyone will have a TV set at home. Besides TV and microwave oven, computers, refrigerators, air conditioners and mobile phones are the most common things at home.

Perhaps you have heard that many household appliances will produce electromagnetic waves with different intensities, wavelengths and frequencies when they are used. If household appliances are not used properly, they may be exposed to electromagnetic radiation, thus posing a threat to human health.

Lack of understanding of electromagnetic radiation

Although the radiation of general electrical appliances is only a small amount, it will not cause obvious harm to the body in a short time, but does the manufacturer also indicate the radiation index of its products in a certain period of time while ensuring the quality of goods?

Zhuang De 'an, the person in charge of Liming Trading Home Appliances Store, said: "If the manufacturer indicates the electromagnetic radiation index, people with knowledge in this field will use it more carefully, but consumers who generally don't know exactly may be afraid to buy it. Usually, there are columns such as "Please note" or "Use with care" in the manual. Although it is difficult to see manufacturers frankly admit that goods have electromagnetic radiation, they can often notice one thing in the rules of use. "

In the user's manual, some guide the user to place the electrical appliance in a suitable position, and some even directly remind the user to turn off the power supply when not operating. But in any case, there will be no such explanation: this product has a small amount of electromagnetic radiation, so it is better to stay away.

Electromagnetic radiation is a cumulative injury, and it is impossible to find out from which electrical appliance or when the victim was irradiated. As a result, it seems that any electrical appliance manufacturer is not responsible.

"Even if you obviously know what kind of electrical appliances emit radiation, even if you complain to foreign manufacturers, it will take at least one or two years to go through the formalities, and local consumers don't know enough about the electromagnetic radiation of electrical appliances. Without this concept, almost no customers have cared. Generally what they need to know is the price and power consumption. "

Thai authorities prohibit children from using mobile phones because it has recently been confirmed that mobile phones have serious electromagnetic radiation. Mobile phone radiation quickly attracted the attention of the world, perhaps because it is closest to the brain when used.

Electromagnetic radiation can penetrate the human body.

Chen Huiling, the public relations manager of Motorola's local company, said: "In fact, the head office realized the problem of electromagnetic radiation generated by mobile phones a long time ago, so it specially printed a manual to guide the safe use of mobile phones, including the electromagnetic energy of wireless mobile phones affecting human health during operation. The manual is based on the point of view of dispelling doubts. However, as far as I know, I have not been exposed to any customer complaints except the relevant inquiries from the media. "

It can be seen that China people's understanding of electromagnetic radiation is still insufficient.

The frequency unit of electromagnetic waves is hertz (Hz).

You can never witness this "cool killer" with your own eyes. It is colorless, tasteless and untouchable.

When the oscillation frequency of electromagnetic wave exceeds 654.38+ 1 100 million Hz, it will pose a potential threat to human body. However, according to the international electrical industry standards, electrical appliances must pass the qualified electromagnetic radiation protection test when leaving the factory. However, if we put many electrical appliances together at home and often use them together, you will be in danger of being exposed to excessive radiation.

Excessive radiation interferes with human ecological clock

In fact, the harm caused by excessive electromagnetic waves to the human body has been recorded in earlier years. From 1969 to 1982, 95 1 men in Maryland, USA died of brain tumors. At that time, many electrical industries were developing in the local area, and most of the dead were electricians or electrical engineers. Later, the Texas Cancer Medical Foundation made a sampling test on some patients who suffered from electromagnetic waves, and found that the growth rate of cancer cells in workers working near high-voltage electricity was 24 times faster than that of ordinary people.

As long as the electrical appliance is working, there is electromagnetic field or electromagnetic radiation around it. This kind of radiation has certain energy and can penetrate many substances, including the human body. According to the examination and approval standards, if it does not exceed 50 microwatts per square centimeter, the total dose per day does not exceed 300 microwatts per square centimeter, which is still safe enough. But the danger is that it is colorless, tasteless and untouchable. You may be unconsciously exposed to the accumulation of different electromagnetic radiation every day, because the influence of electromagnetic radiation on human body is slow and indirect, and because of this, its harmfulness is easily overlooked by people.

If the long-term exposure exceeds the safe radiation dose, it will kill (even kill) human cells in a large area. Electromagnetic waves will also affect and destroy the original current and magnetic field of human body, so that the original electromagnetism of human body will change. This will interfere with the human body's ecological clock, leading to the disorder of ecological balance and autonomic nervous function, such as headache, fatigue, fatigue, excitement, memory loss, inattention, skin fever, hair loss, palpitation, arrhythmia, blood pressure disorder and so on.

Electromagnetic waves will also affect the nervous system of the brain, slow down the speed of melatonin production in the pineal gland below the brain, and affect normal sleep. Electromagnetic waves can also damage cell membranes, interfere with hormones, affect children's development, women's menstrual disorders, and male sexual dysfunction. Electromagnetic waves also have obvious harm to the eyes, which will make the crystals of the eyes turbid and cause "electromagnetic wave cataract".

Computer: Low-frequency electromagnetic fields may affect embryos.

People who need to work in front of the computer for a long time should refer to the standard operation suggestions in the manual and keep a safe distance from the computer. Most people think that the computer filter can block the electromagnetic radiation of the computer, but according to the latest report, this filter actually has little protection for computer users.

After the computer is started, it will produce electromagnetic radiation, including X-ray, frequency folding, ultra-low frequency, electrostatic field and so on. Fortunately, most of the X-rays will be absorbed by the original glass cover on the screen, and the dose that can really leak out is very small. However, the ultra-low frequency electromagnetic field generated around the computer will have adverse effects on embryos. Long-term exposure may interfere with the normal development of embryos, and even lead to abortion in severe cases.

When purchasing electrical appliances, you should read the user manual carefully to ensure safety.

If there are too many computers in the office and you spend too much time in front of the computer, you should always open the window to ventilate and let the positive ions in the air escape.

Microwave oven: If the microwave oven leaks, stay away as soon as possible.

The microwave emitted by a microwave oven is a kind of high-frequency electromagnetic wave. In the spectrum of electromagnetic wave, it is between ultrashort wave and infrared ray. Microwave has great penetrating power. Because of microwave irradiation, molecules inside the object move at high speed, resulting in friction, so that the temperature rises rapidly and things can be cooked. The microwave oven will have no influence on the human body under the correct operation and use, but if it is found that the microwave leakage accidentally hurts the human body, it should be kept away from the microwave environment as soon as possible. Generally speaking, in minor cases, the injured tissue can gradually return to normal as long as it is out of contact. Pregnant women and children should try to stay away from the microwave oven.

TV: Less negative oxygen ions will cause discomfort.

You really shouldn't get too close when watching TV. Being too close will not only hurt the eyes, but also when the CRT is activated, the cathode of the TV will emit high-energy electron beams. When these electron beams violently hit the fluorescent substance on the inner wall of the screen, images will be displayed on the screen, but penetrating X-rays will also be produced.

There'd better be a time limit for watching TV. If you want to watch it for a long time, remember to leave the scene at least once an hour. The seat is at least two meters away from the TV, and it is best to install a protective screen. When the TV screen displays images, it will also release a large number of positive ions, which will absorb negative oxygen ions in the surrounding air like magnets, thus greatly reducing the negative oxygen ions in the indoor air. Being in a state of lack of negative oxygen ions for a long time makes people prone to headache, chest tightness and loss of appetite. People who watch TV for a long time should also pay attention to the indoor air circulation.

Mobile phone: security will be the selling point in the future

Mobile phones have long been popular, and now almost everyone has a mobile phone. Mobile phones are operated in ultrashort wave band, and the effect of this ultrashort wave is even greater than that of microwave ovens. When a person is exposed to uncontrolled radiation of ultrashort wave frequency, he will have fatigue and headache. If he is repeatedly exposed to inertial radiation, it is likely to lead to disabled cataract caused by electromagnetic waves.

Lawrence Charley, vice chairman of the British medical supervision organization, warned long-term users of mobile phones: "Unless it is really necessary, you should avoid using mobile phones and switch to ordinary mobile phones. When it is inevitable, you should keep your mobile phone away from your brain. " Short wave is more lethal and invisible. The American medical department found that many police officers in expressway who used radio short-wave detectors to determine the speed of cars had tumors. However, it is still controversial whether the ultrashort wave intensity of mobile phones is enough to cause cancer.

Some experts in Germany have also studied that a mobile phone with a radiation throughput of more than 5 watts may affect health, while the habit of children playing and dialing the phone at will is very worrying. However, due to too many mobile phone brands, the performance and radiation throughput of each family are inconsistent, generally between 2 and 8 watts, and its real safety index remains to be verified. It is predicted that the strategic point of mobile phones in the market in the future will no longer be the competition of styles, nor the length of battery life, but the minimum safety level of electromagnetic radiation of mobile phones.

In fact, in addition to the above-mentioned household appliances, any electrical appliance equipped with electronics, scanning function, radar function and vacuum tube will emit electromagnetic radiation to varying degrees when energized.

In modern cities, life often encounters power supply problems, and it is really difficult to avoid electromagnetic influence from nature or man-made. Therefore, it is the best policy to minimize the chance of impact.

Guard against electromagnetic radiation

Don't use all household appliances together.

If there is an application manual, please keep a safe operating distance according to the manual.

In any case, try to avoid long-term operation.

Keep the indoor air circulating.

When the appliance is not in use, it is best to turn off the power supply and don't let it stand by.

In the long run, this will not only save electricity, but also reduce trace radiation.

Accumulate.

Electromagnetic radiation and human health

The development of modern electronic technology has created a great material civilization for mankind, and also brought mankind into an environment full of artificial electromagnetic radiation. Electromagnetic radiation is harmful to human health. It has become the fourth largest environmental pollution after water, air and noise, and has been listed as the pollution that must be controlled by the United Nations Human Environment Conference. China's environmental protection department also officially informed the press on May 7th that 1999 electromagnetic radiation is harmful to human body.

The harm of electromagnetic waves to human body can be divided into three types:

1, which leads to the macroscopic thermogenic effect of all or part of human body temperature rise.

2. It only causes microscopic thermogenesis of cells or local pathological changes of human organs.

3. Non-thermal effects caused by the interaction between the electric or magnetic fields of electromagnetic waves and human tissues and cells.

The electromagnetic wave power density that produces macroscopic thermal effect is10mw/cm2; The microscopic thermogenic effect is1MW-10mw/cm2; The light thermal effect is below 1mW/cm2.

The harm of electromagnetic waves to human body is mainly manifested in the following aspects:

1. Macro-thermal effects will cause irreversible damage to human tissues or organs, such as eye cataracts and male infertility. When microwave with power of 1000W directly irradiates people, it can kill people in a few seconds.

2. The non-thermal effect of high-frequency weak electromagnetic field on human body should be reflected in the following aspects:

Nervous system-after repeated electromagnetic radiation, the functions of the central nervous system and other aspects change. For example, conditioned reflex activity is inhibited, bradycardia, blood pressure is reduced, local blood cavity block, dyspepsia and so on.

Sensory system-low-intensity electromagnetic radiation will reduce people's sense of smell. When people's heads are irradiated by low-frequency and low-power audio pulses, it is necessary to make people hear sounds like mechanical ringing, insects or birds singing.

Immune system-It has been preliminarily observed in China that compared with normal people of the same age, the immunoglobulin 1gG in humoral and cellular immune indexes decreased, and the product of T cell rosette and lymphocyte transformation rate decreased, thus reducing the humoral and cellular immune ability.

Endocrine system-low-intensity microwave radiation can make people's thalamus-pituitary-adrenal function disorder; The activities of CRT and ACTH increased, and the endocrine function was obviously affected.

Genetic effect-microwaves can damage chromosomes. Animal experiments found that; When mice are irradiated with microwaves of 195MHz, 2.45GHz and 96Hz, 4- 12% of the spermatogonia will form chromosome defects, which can be passed on to mice. Chromosome defects can lead to mental retardation and shorten the average life span of the injured.

So, what are the electromagnetic pollution sources around us? In addition to some large-scale RF equipment in industry, military, science and medicine, the biggest electromagnetic pollution sources in our daily life are mobile phones, microwave ovens, computers, vcd, televisions and so on. , especially the computer, it produces electromagnetic radiation has the greatest impact on the human body, because:

(1) people work in front of the computer for a long time;

(2) The display screen is close to people, generally about 30cm.

The frequencies of these radiations are all below 100 kHz, and their effects on human health belong to the category of non-thermal effects. 1998 The World Health Organization (WTO) pointed out in its latest revision opinion on computer screen and workers' health that there are some factors that may affect the pregnancy outcome in the working environment of computer screen. So who will be affected and how?

First of all, the man is affected. Long-term exposure to electromagnetic waves may reduce the number of male sperm, make sperm genes abnormal, and may be infertile or deformed. According to a professor who studies andrology, it was very common that the number of male sperm exceeded 6,543.8+billion per milliliter 10 years ago, but now there is not one in a year, even more than 60-70 million per milliliter. In medicine, the normal value of sperm is 60 million to one pregnant and fifty million per milliliter. If it is less than 60 million per milliliter, it is difficult to get pregnant, followed by pregnant women. It is reported that 1 week pregnant women who work in front of the computer for more than 20 hours are 2-3 times more likely to suffer from deformity than ordinary pregnant women, and the probability of giving birth to girls is even greater.

We must attach great importance to this major eugenic problem. A little carelessness may cause irreparable losses to the family and society. In order to be responsible for the country, the nation and the new generation in the 2 1 century, we have the responsibility to guard against teenagers, many of whom like to indulge in video games and computers. They deserve special care, and parents who have the conditions are advised to equip them with shielding clothes and pants. More attention should be paid to unmarried young men and women to prevent problems before they happen. As for the newlyweds, we should plan ahead. The woman should pay attention to prevent electromagnetic pollution before pregnancy. Specifically, couples wear protective clothing with anti-electromagnetic radiation function before boarding the plane. Once pregnant, if conditions permit, the woman will temporarily leave her post in front of the computer. If she can't move, she will wear protective clothing against electromagnetic radiation.

Magnetic field intensity at different positions of household appliances;

/new _ news/admin/news file/2005 102 1 1 1 102 1 . html

References:

Hui cong com