A bearing heater is a device that can generate or create high temperatures. Generally speaking, the maximum temperature is about 70-300°C. It contains three parts: heating, heat dissipation and temperature control. The bearing heater is an energy conversion device. The energy input to the bearing heater comes in the form of chemical energy in the fuel, electrical energy, thermal energy of high-temperature flue gas, etc., and after conversion by the bearing heater, thermal energy with a certain temperature is output to the outside. , thereby heating the air or other boundary materials to achieve the required purpose. The high temperature generated by the bearing heater can directly provide the required heat energy or heating for industrial production and public life. Large bearing heaters are mainly used in industry, and small heaters are mainly used in daily life. Bearings Bearing heaters are the most common in our lives. Electric bearing heaters refer to electrical appliances that use electric energy to achieve heating effects. They are distinguished by the type of heating method and can be divided into three categories: 1. Electromagnetic heating – Electromagnetic heating generates an alternating magnetic field through the components of the electronic circuit board. When an iron-containing container is placed on it, the alternating magnetic field lines are cut on the surface of the container and an alternating current is generated in the metal part at the bottom of the container ( That is, vortex), the vortex causes the iron atoms at the bottom of the container to move irregularly at high speed, and the atoms collide and rub against each other to generate heat energy. This has the effect of heating items. Because the iron container generates its own heat, the heat conversion rate is extremely high, up to 95%. Induction cookers and induction cooktops all use electromagnetic heating technology. 2. Infrared heating – The form of heat transfer by infrared rays is radiation heat transfer, which transfers energy by electromagnetic waves. When far-infrared rays irradiate a heated object, part of the rays are reflected back and part of the rays are penetrated. When the wavelength of the emitted far-infrared ray is consistent with the absorption wavelength of the heated object, the heated object absorbs the far-infrared ray. At this time, the molecules and atoms inside the object “resonate” – producing strong vibration and rotation, and the vibration and rotation cause The temperature of the object increases, achieving the purpose of heating. 3. Resistance heating – a heating method that uses electric current to release heat through an electric heating element to heat the billet. Common resistance wire heating, ceramic bearing heaters, resistance ring heating, and quartz tube heating are all resistance heating in principle. Comparison of three bearing heaters: 1. The heating of resistance bearing heaters is the most primitive, so the thermal efficiency is also the worst. Usually the thermal efficiency is only about 70%, and a large amount of heat energy is dissipated into the air. 2. The heating method of infrared rays is better than that of resistance, but it still dissipates a large amount of heat into the air, but it is not the infrared rays itself that dissipates into the air, but the heated object dissipates heat into the air. 3. When the Feiru electromagnetic bearing heater works, there is an insulation layer that wraps the heated object, and then the magnetic field directly heats the object itself through the insulation layer, so the thermal efficiency is the highest and almost no heat energy is lost, and its thermal efficiency exceeds 95%. And because Feiru electromagnetic bearing heater heats the heated object itself, there is no heat transfer loss. The overall energy saving is about 30%-70% of resistance heating under the same conditions. Infrared bearing heater cannot compete with electromagnetic heating due to its heating characteristics. Detailed comparison, but calculated based on the emitted temperature, electromagnetic heating should save more than 20% energy than infrared heating under the same conditions.

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