Bearing heater is a kind of equipment that can generate or produce high temperature, generally speaking, the highest temperature is about 70-300℃, it contains three parts: heat generation, heat dissipation and temperature control. Bearing heater is a kind of energy conversion equipment. The energy input to bearing heater is in the form of chemical energy in fuel, electric energy, heat energy of high temperature flue gas, etc., and after bearing heater conversion, the heat energy with certain temperature is output outward, so that the air or other boundary mass can be heated to achieve the required purpose. Bearing heater produced by high temperature can be directly for industrial production and public life to provide the required heat or heating, large bearing heaters are mainly used in industry, small heaters are mainly used for life. Bearing bearing heater is the most in our life. Electric bearing heater is the use of electrical energy to achieve the heating effect of the electrical appliances, according to the type of heating to distinguish, can be broadly divided into three categories. 1. electromagnetic heating – electromagnetic heating is through the electronic circuit board components to generate alternating magnetic field, when placed on top of a container containing iron, the surface of the container with that cut alternating magnetic lines of force and in the metal part of the bottom of the container to produce alternating current (i.e. eddy current), eddy current so that the bottom of the container iron atoms high-speed irregular movement, atoms collide with each other, friction and generate heat. friction and generate heat energy. Thus the effect of heating items. Because the iron container itself heats up, all the heat conversion rate is particularly high, up to 95%. Induction cookers and induction stoves use induction heating technology. 2. Infrared heating – infrared heat transfer form is radiation heat transfer, by electromagnetic wave transfer energy. When the far infrared rays hit the object being heated, part of the rays are reflected back and part is penetrated through. When the wavelength of the emitted far infrared rays and the absorption wavelength of the object to be heated are the same, the object to be heated will absorb the far infrared rays, and then the molecules and atoms inside the object will “resonate” – produce strong vibration and rotation, and the vibration and rotation will raise the temperature of the object The purpose of heating is achieved. 3. Resistance heating – the use of electric current through the body of the electric heat to heat the blank heating method. Common resistance wire heating, ceramic bearing heaters, as well as resistance coil heating, quartz tube heating, in principle, all belong to resistance heating. Comparison of the three types of bearing heaters. 1. resistance bearing heater heating is the most primitive, so the thermal efficiency is also the worst, usually thermal efficiency of only about seventy percent, a large amount of heat energy emitted into the air. Infrared heating compared to the resistance to a little better, but still a lot of heat emitted into the air, but not infrared itself emitted into the air, but the object being heated to the heat emitted into the air. 3. Fei Ru electromagnetic bearing heater work is a layer of insulation to the heated object wrapped, and then the magnetic field through the insulation layer directly heats the object itself, so the thermal efficiency is the highest almost no heat loss, its thermal efficiency of more than 95%. And because of fly as electromagnetic bearing heater is heated object itself heat so there is no heat transfer loss, the overall energy saving is about the same conditions resistance heating 30%-70%, infrared bearing heater because of its heating characteristics can not do a detailed comparison with electromagnetic heating, but the temperature emitted to calculate, the same conditions should fly as electromagnetic heating than infrared heating to save energy in more than 20%.  

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