Radiation effects of electromagnetic heaters

While electromagnetic heaters emit a certain amount of radiation during use, this frequency has been tested and shown to pose no risk to the human body. Products manufactured by reputable manufacturers undergo rigorous testing and inspection. The radiation emitted by electromagnetic heaters is 1/60th that of a mobile phone, comparable to a 40-watt fluorescent light bulb, and therefore completely harmless.

Users have long questioned whether the radiation generated by energy-saving electromagnetic heaters during heating poses a health risk. Electromagnetic heaters utilize the heating principle of magnetic field-induced current (also known as eddy current). This heating principle utilizes components of an electronic circuit board to generate an alternating magnetic field. When a coil is wound around the surface of a ferrous barrel, the barrel cuts through the alternating magnetic field lines, generating alternating currents (i.e., eddy currents) in the metal surface. These eddy currents cause the iron molecules in the barrel to move at high speeds and irregularly. The collision and friction between the molecules generate heat energy, resulting in a certain amount of radiation during use.

Electromagnetic waves between 90MHz and 300MHz are most harmful. Above 300MHz, the closer to 12000MHz, the less harmful the radiation. Therefore, frequencies of 900MHz and 1800MHz are both within the harmful range. As for industrial heating electromagnetic motors, the frequency is 20~40KHz, which belongs to the normal audio signal (20~40kHz range) and is harmless to the human body. Therefore, users can use electromagnetic heater products with confidence without worrying about radiation damage to the human body.