The mechanism of electromagnetic radiation harming human body is mainly thermal effect, non thermal effect and cumulative effect. The thermal effect is mainly because water molecules rub against each other after being radiated by electromagnetic waves, resulting in an increase in temperature. The human body contains 70% water, so it will increase the body temperature and affect the normal work of organs in the body.
Selection method of induction cooker
Due to the increasing scarcity of raw materials such as natural gas and more and more electric furniture, induction cooker has unknowingly entered most families due to its characteristics of safety, health, energy saving and convenience. Moreover, the current induction cooker has powerful functions, including steaming, boiling, frying, frying, frying and so on. There are more and more kinds of induction cooker in the market, so how should we buy induction cooker in the face of a wide variety of induction cooker?
The first is to select the power. Select the appropriate power according to the needs, because the greater the power, the faster the heating speed, the more power consumption, and the higher the price. Therefore, the purchase should be based on the number of diners and use. Generally speaking, families with less than 3 people choose about 1000W; About 1300W for 4 ~ 5 candidates; 1600W is suitable for 6 ~ 7 candidates; 1800W induction cooker shall be selected for more than 8 people.
Secondly, high-quality induction cooker should have the function of automatic output power adjustment to improve power supply adaptability and load adaptability. The quality of induction cooker depends on the quality of high-frequency high-power transistor and ceramic glass-ceramic panel. Therefore, when purchasing, be sure to buy an induction cooker with a single high-power transistor with high speed, high voltage and high current. It has good quality, excellent performance, high reliability and is not easy to be damaged.
Furthermore, check whether the automatic detection function works, including small object detection, automatic shutdown protection for overheating, automatic shutdown protection for overvoltage or undervoltage, automatic stop heating protection for air combustion, 2-hour power-off protection, automatic shutdown protection for 1 ~ 2 minutes, audible and visual alarm display, etc. This is the automatic protection function of induction cooker. When purchasing, power on and test the machine to see whether its protection function works normally according to the relevant detection methods in the operation manual.
Moreover, the fan should work smoothly. When the induction cooker is not working, turn it over and shake it. There shall be no gap and looseness between the fan blade and the shaft, and between the shaft and the bearing; After power on, the motor shall have no obvious noise or friction sound, and the fan blade shall rotate smoothly without swing and rotation.
In addition, the appearance of the furnace surface shall be flat and free from damage. If the furnace surface is convex, concave or inclined on one side, it will affect the normal generation of thermal efficiency. Therefore, we should also pay attention to the control of heat energy conversion and bottom temperature.
Finally, it should be noted that the surface, side and bottom of the induction cooker should not be bruised or scratched, the decorative pattern should be clear, and the fastening screws at all parts should not be loose.
Hazards of induction cooker
Many people say that induction cooker does great harm, so what harm does induction cooker do?
In fact, the harm of induction cooker is the harm of electromagnetic wave. According to the introduction of electromagnetic radiation experts in the industry, at present, the electromagnetic radiation intensity leaked by induction cooker at work has exceeded the ability of human body. Therefore, it is suggested that expectant mothers should not use induction cooker to avoid unimaginable impact on the fetus. It is introduced in 32 items of the national standard gb4706.29-92 special requirements for safety of electromagnetic cookers of household and similar electrical appliances: electromagnetic radiation is one of the inducing factors of some diseases such as cardiovascular and cancer, which can be harmful to people.
According to the 1998 World Health Organization survey, the impact of electromagnetic radiation on human body mainly includes the following aspects:
(1) Electromagnetic radiation is one of the main causes of cardiovascular disease with diabetes and cancer mutation;
(2) Electromagnetic radiation affects the development of children's body tissues and bones, resulting in the decline of vision and liver hematopoietic function. In severe cases, it can lead to retinal detachment;
(3) Electromagnetic radiation will cause direct damage to human reproductive system, nervous system and immune system; Make male sexual function decline and female endocrine disorder; It causes abortion, infertility, malformation and other diseases of pregnant women.
The mechanism of electromagnetic radiation harming human body is mainly thermal effect, non thermal effect and cumulative effect. The thermal effect is mainly because water molecules rub against each other after being radiated by electromagnetic waves, resulting in an increase in temperature. The human body contains 70% water, so it will increase the body temperature and affect the normal work of organs in the body. The non thermal effect is because there is a weak electromagnetic field in human organs and tissues. Once disturbed by the external electromagnetic field, the weak electromagnetic field in equilibrium will be destroyed and the human body will be damaged. As for the cumulative effect, the thermal effect and non thermal effect have a cumulative effect on the injury of human body. For groups exposed to electromagnetic wave radiation for a long time, even if the electromagnetic wave power is very high and the frequency is very low, they may be induced unexpected lesions.
Therefore, when using the induction cooker, you must leave a certain distance. If you buy the induction cooker, you'd better directly buy the national key new product promoted by the state recently - non radiation induction cooker, so as to ensure health.