The induction heating device is a three-phase power frequency alternating current, which is rectified into a direct current, and then the direct current is converted into an adjustable current, and an alternating current flowing through the capacitor and the induction coil is supplied to generate a high density in the induction coil. The magnetic lines of force and the cutting of the metal material contained in the induction coil create a large eddy current in the metal material. This eddy current also has some properties of high frequency current, that is, the free electrons of the metal itself flow in the metal body with resistance to generate heat. For example, a metal cylinder is placed in an induction coil with alternating intermediate frequency current. The metal cylinder is not in direct contact with the induction coil. The temperature of the energized coil itself is already low, but the surface of the cylinder is heated to redness or even melt. And the speed of redness and melting can be achieved by adjusting the frequency and current intensity. If the cylinder is placed in the coil core, the temperature around the cylinder is the same, and the cylinder is heated and melted without generating harmful gases or strong light to pollute the environment. Induction heating equipment is widely used in various fields such as forging, casting, heat treatment, mechanical thermal processing, powder metallurgy.
Traditional heating equipment, such as boilers. The boiler is an energy conversion device. The energy input to the boiler is in the form of chemical energy in the fuel, electric energy, heat energy of high-temperature flue gas, etc., and is converted by the boiler to output steam, high-temperature water or organic heat carrier having a certain heat energy. . The original meaning of the pot refers to the water container heated on the fire, the furnace refers to the place where the fuel is burned, and the boiler includes two parts of the pot and the furnace. The hot water or steam generated in the boiler can directly supply the required heat energy for industrial production and people's life. It can also be converted into mechanical energy by steam power plant, or converted into electrical energy by a generator. The boiler that supplies hot water is called a hot water boiler, and is mainly used for living, and there are also a small number of applications in industrial production. Steam generators are called steam boilers, often referred to as boilers, and are used in thermal power plants, ships, locomotives, and industrial and mining enterprises.
Main disadvantages of combustion boilers 
1. The efficiency of the combustion heating boiler itself can be relatively high and the combustion is sufficient, but the efficiency of absorption by the medium is low, and a large amount of heat is discharged from the flue. 
2. The combustion boiler itself is difficult to heat insulation, the pipeline transports high temperature medium, the energy is wasted, the construction cost is high, and the occupied land area is large. 
3. Fuel-fired natural gas transportation consumes time and energy and costs. 
4, burning mode, a large amount of oxygen consumption, and discharge a large amount of polluting gas, not environmentally friendly. At the same time, the boiler is consuming a large amount of water.
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5. After the heat is delivered to the station by steam, a large amount of condensed water needs to be released, and a large amount of sensible heat and latent heat are wasted. 
6. There are safety hazards in the combustion boiler and special periodic inspections are required.
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7. Due to the shortage of crude oil natural gas supply, prices are rising.
Advantages of electromagnetic induction heating
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1. It is easy to heat and heat on site, waste of smokeless exhaust gas and high thermal efficiency.
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2. There is no need to build boilers, pipes and insulation measures that occupy a large area.
3. No fuel transportation and storage. Transmission is more efficient and less efficient than fuel and heat, safe and convenient.
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4, high temperature control accuracy, easy to achieve automatic control of the process.
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5. The industry has a wide range of adaptations, especially for medium power and dispersed energy applications.
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6. With the expansion of new energy development and the policy of vigorously developing nuclear energy in the 12th Five-Year Plan, there is a huge price advantage for electric heating.
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7. No oxygen burning, flue gas exhaust and dust, oxide pollution emissions. 
8, in line with the city's "net, smooth, å®, beauty" activities, no pollution, no disturbing people noise.
Induction heating technology currently has the highest heating efficiency and the fastest energy consumption for metal materials. It has been widely used in various industries for the thermal processing, heat treatment, thermal assembly and welding, smelting and other processes of metal materials. It can not only heat the whole workpiece, but also localized heating of the workpiece; it can realize deep heat penetration of the workpiece, or it can only concentrate on the surface and surface layer; not only can the metal material be directly heated, but also non-metal. The material is indirectly heated. and many more. Therefore, induction heating technology will become more and more widely used.
A surface heat treatment process in which a workpiece is locally heated by an induced current. This heat treatment process is often used for surface hardening, local annealing or tempering, and sometimes for overall quenching and tempering. In the early 1930s, the United States and the Soviet Union began to use surface induction quenching by induction heating. With the development of the industry, the induction heat treatment technology has been continuously improved and the application range has been continuously expanded.
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Label: What are the advantages and disadvantages of induction heating equipment compared to traditional heating equipment?
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