Many people say that the induction cooker is very harmful. So, what harm does the induction cooker have?
In fact, the hazard of the induction cooker is the hazard of electromagnetic waves. According to the electromagnetic radiation experts in the industry, the electromagnetic radiation intensity leaked by the induction cooker at work has exceeded the ability of the human body to endure. Therefore, it is recommended that mothers should not use the induction cooker to avoid Unpredictable effects on the fetus. The World Health Organization stated in its investigation in 1998 that electromagnetic radiation is one of the predisposing factors for diseases such as cardiovascular and cancer, and it also causes direct damage to the human reproductive system, nervous system and immune system.
How the induction cooker works
The working principle of the induction cooker is to convert the low-frequency AC power supply of 50Hz into a high-frequency AC power supply of 30kHz~40kHz and directly add it to the coil disk of the induction cooker to generate a high-power electromagnetic field, and then use the electromagnetic field to generate eddy current and heat the pot body, that is, It is said that the induction cooker directly uses electromagnetic radiation to heat the cookware.
In the ordinary induction cooker, the electromagnetic radiation generated by the coil disk in addition to heating the pot body on the furnace surface, a part of the electromagnetic radiation will be vented from the induction cooker body and the pot body, and the leakage electromagnetic radiation is said. This part of electromagnetic radiation is an electromagnetic radiation source that endangers human health. The intensity of the external radiation source is related to the power of the induction cooker and the quality of the induction cooker.
Electromagnetic radiation hazard
The operating frequency of the induction cooker is 20 kHz to 30 kHz. The electromagnetic wave in this frequency band is very suitable for heating ferromagnetic pots. However, this frequency band belongs to the extremely low frequency electromagnetic band. In 2001, the World Health Organization clearly announced that people exposed to low frequency magnetic fields and low frequency noise for a long time, the probability of suffering from leukemia, malignant tumor, fetal malformation, tinnitus and other diseases is several times that of the general population. 2001 The International Agency for Research on Cancer, a World Health Organization, has identified low-frequency magnetic fields as suspected carcinogens. The electromagnetic wave leakage at the edge of the induction cooker is very large, which is beyond the tolerance of the human body. It is generally recommended to use the induction cooker as little as possible or not, especially when using the induction cooker to eat the hot pot for a long time.
Electromagnetic radiation standard
At present, there is no standard for electromagnetic oven radiation in China, and the standard used is the international electromagnetic compatibility standard CISPR11. According to this standard, most manufacturers' electromagnetic radiation is within the safe range. At present, there are two major problems in this standard. First, it is not mandatory testing. Enterprises can take the initiative to send or not. This problem determines that some companies that are not confident in their own products can go on sale without going through the electromagnetic monitoring.
Secondly, whether this standard test method is applicable to the induction cooker is also a big problem. Since people constantly move while cooking, if this standard only measures the radiation intensity at the edge of the induction cooker, there is no measurement in the vertical direction, and it is not representative. Therefore, only the national mandatory standards for induction cooker radiation can be truly applicable.
Scientists generally believe that long-term exposure to electromagnetic radiation below 0.2μt is safe. However, any form of artificial electromagnetic radiation has an effect on human cells, and most of the electrical appliances we contact produce more than 2 μt of radiation.
In the EU, the United States and Japan, the requirements for electromagnetic compatibility of products are also strict. Domestically produced products are exported to these markets, and must be certified in this respect. Most of the domestic induction cooker products cannot pass the certification of European and American countries. In fact, due to the large radiation, the induction cooker is rarely used in European and American countries. The general households use open flames or electric furnaces. European and American countries pay more attention to the protection of users in product design (this is mainly because their laws have strict legislation in this regard), if the manufacturer is suspected of causing harm to users, it will pay a heavy price, and our domestic consumers Benefits are not easy to get attention to.
Radiation is closely related to the material of the pot
The amount of radiation in the induction cooker has a very important relationship with the material of the pot used, because the pot is used to absorb the magnetic field generated by the induction cooker. If the magnetic resistance of the pot material is small, the absorption capacity of the magnetic field is strong. It is recommended that consumers use stainless steel induction cookers. In addition, since the cooker of the induction cooker is heated by the ferromagnetic molecules and the magnetic induction, the cookware has to contact the furnace surface in a large area. Most induction cookers on the market today require the use of pans, which are made of iron or stainless steel. If the consumer wants to cook with a casserole, etc., it is necessary to purchase a professionally processed one, such as silver powder coated on the bottom.
The induction cooker heats the pot by electromagnetic waves, and the visible power is very large. Even if the ratio of electromagnetic leakage is small, the power value of this leak is still large, and it has obvious damage to the human body. If the user has metal objects, such as metal frame glasses, necklaces, metal belts, etc., these metal objects are like the director of the receiving antenna, so that the radiation will be larger.
The method of use also determines the extent of radiation damage to the human body. When using the induction cooker, you must leave a certain distance. If you buy a new induction cooker, you can also choose to purchase the national key new product that has been promoted by the country recently - "radiation-free induction cooker", so that you can provide more than one guarantee for your family's health.
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