Events: Electrical head to distance the greater the radiation is not necessarily the key to greater
| Event Details:
110 104 "consumer advocate": Know the radiation around?
Electrical head to distance the greater the radiation is not necessarily the key to greater
Refrigerator, TV, microwave, humidifier, vacuum cleaners, cell phones, laptops ... ... life is really a lot of appliances, which a large radiation, which radiation small?
China's "environmental electromagnetic waves" provision, the intensity of electromagnetic radiation of less than 10 V / m, are safe range. If we are exposed to electromagnetic radiation more than 10 volts / meter environment, the body is likely to be harmed.
To measure the size of radiation, it needs a professional equipment - field strength meter, which measured the way through the field of electromagnetic radiation to determine the size of electrical appliances.
The greater the head the greater the radiation does not necessarily
Beijing University of Aeronautics and Astronautics, Institute of Dr. Cao Jingyang EMC had some testing for us, the first notebook computer to Cece, we found that the field strength meter moved to the bottom of the computer screen when the field reached a maximum of 13 V / m, back of the computer keyboard, regional and field strength are also nearly 13 V / m, and about half meters away from the location of the computer, the field strength is reduced to 5 volts / m or less.
Cao told us that the computer side put glass of water or green plants like cactus, for radiation protection, it does not play a significant effect, such as radiation protection measures apply primer, and indeed there is no scientific basis. The best way to reduce the electromagnetic radiation is to try and appliances to maintain a certain distance.
Laptop measured, and we detected a 50-inch big screen plasma TV screen in front of radiation at 4 V / m, large color TV actually electromagnetic radiation is lower than the laptop much. Cece again refrigerators, refrigerator on the back of the radiation about 5 volts / m, in front of the handle position is close to 10 volts / meter, the reason for such a big gap between front and rear, in front of the handle because the refrigerator has an LCD screen, LCD screen behind circuit board, so the larger radiation.
Cao suggested that if you want to reduce the radiation, the first time consumers in the purchase of refrigerators to prevent the refrigerator with LCD screen, and the second, a half meters away from the fridge, pull out his arms, shut the refrigerator door.
Air-conditioning of electromagnetic radiation that be? The results show that the radiation is probably air-conditioned 3 V / m, and TV radiation similar. It would appear bigger in size the greater the radiation of electrical appliances may not be.
The smaller the farther away from radiation
We also tested a microwave oven and found that the strongest part of the radiation control panel, the field strength close to 20 volts / m, microwave cavity, including the door part of the radiation but smaller, less than 10 volts / meter.
Cao explained that the same reason, and refrigerator, microwave oven control panel with LCD screen, so electromagnetic radiation is higher. To reduce the radiation, there is no LCD screen, you can buy a microwave oven, of course, can leave more than half a meter away from operating microwave ovens, the body receives the electromagnetic radiation will be greatly reduced.
Compared to laptops and desktop computers, and who more radiation it? We also tested a desktop computer, Strength Meter display, keyboard area of radiation in 2 to 3 V / m, the display part to reach the 6 to 7 volts / meter.
Although LCD displays and the location of electromagnetic radiation, radiation than a large keyboard nearly doubled, but overall, the desktop computer than a laptop computer or a smaller number of electromagnetic radiation.
The radiation also humidifier 10 V / m or more, better than a small computer. Working state of the induction cooker radiation up to 70 volts / m, while the cooker at a distance of about 1 m, the field strength is reduced to 8 to 10 volts / meter.
Hair dryer radiation more than 10 volts / meter. Can be as far away from other electrical appliances, hair dryer stay away how to blow it? Cao suggested that minimize the use of hair dryer, if used, the shorter the better.
Vacuum cleaner to the rear of the field strength of 13 V / m, also more than 10 volts / meter security value, but we will usually operate from the vacuum cleaner when a certain distance, so that electromagnetic radiation has been greatly diminished.
Will old TV is relatively large radiation it? We also examined the electronic one old CRT TV, the screen of the electromagnetic radiation actually reaches more than 100 volts / meter, is now the largest measuring electrical radiation. However, Cao tells us that while radiation to the TV screen more than 100 volts / meter, but we usually watch TV is to leave a certain distance, the received radiation will be much smaller, experimental shows, in addition to two meters away from the TV place, the field strength is down to 5 volts / m or less.
Can radiation exposure suit in the end
Many women were wearing radiation suits, radiation suit in the end that radiation can it? Field Strength Meter has been tested by us, just before the TV screen ever measured the electromagnetic radiation to reach more than 100 volts / meter, with the radiation protection suits isolated, the radiation drops to 10 volts / m, indicating that radiation protection suits, or have a certain effect. Cao also remind you, we must choose the regular services of qualified radiation protection for pregnant women.
Small appliances inside, juice of electromagnetic radiation in the 7 to 8 V / m, Iron electromagnetic radiation is even smaller than the juice.
Cao said that the phone just dial the phone, when the radiation is the biggest, once answered, the radiation weakened gradually stabilized, so consumers use the phone, the best to answer the phone in the other and then the phone near the ear.
All in all, to radiation, the simplest and most effective way is to keep a certain distance with the electrical.
Source: CCTV "consumer advocate"
(Editor: Jun-like) |
|
|