As a kind of efficient and flexible heating equipment, coil heater plays an important role in hot installation and hot disassembly. Its working principle is based on the electromagnetic induction and the heat generated by the current through the conductor, and through the precise control of the current and voltage, to achieve rapid and uniform heating of the heated object.

We are a coil heater manufacturer, in-depth analysis of the principle of coil heaters, types, applications and the use of coil materials, in order to provide readers with a comprehensive and in-depth understanding of the purchase can be helpful.

First, the working principle of coil heater

First, let's understand how the coil heater works. Coil heaters use the principle of electromagnetic induction, which creates a magnetic field around the coil when it is energized. When the heated object is placed in a magnetic field, the metal molecules inside the object are affected by the magnetic field and generate eddy currents. These eddies generate heat by overcoming resistance within the metal, which allows the metal to be heated rapidly.

Second, the type of electromagnetic induction coil

1, power frequency heating coil

The frequency of power frequency coil heater is 50HZ, no frequency conversion, this kind of coil is wound by flat copper wire, the winding of the coil is similar to the transformer, the power is large, by the multi-layer flat copper and wound, the copper wire is generally insulated outside, the power frequency coil can be combined with the iron core; The depth and penetration of power frequency heating is strong, the common bearing heating and gear hot loading are used in power frequency, which is widely used and often used in assembly heating, and the disadvantage is that the heating speed is relatively slow.

2, electromagnetic coil heater

The current electromagnetic heating is the use of flexible electromagnetic wire wound into, can be wound flexible wire, high temperature excitation wire with high temperature mica and silicone two materials, can be directly wrapped in the metal outside heating, such as the reaction kettle, injection molding machine heating, usually between the electromagnetic wire and the metal cladding asbestos or asbestos cloth. It is often used in assembly or disassembly, such as disassembling couplings, gears and other electromagnetic coil heaters.

Electromagnetic heating is frequency conversion air-cooled, the advantage is that it can be directly wound, the disadvantage is that it can not heat aluminum.

3. Medium and high frequency heating ring

Medium frequency or high frequency induction heater inductor is hollow copper pipe wound, which is cooled by water, because the frequency of high frequency is high, often high heating temperature, water cooling can ensure long-term high temperature use, such as quenching, forging, welding, annealing, melting or disassembly after heating, automatic heating assembly often choose high frequency heating coil, the two can be combined well. Copper coils can be wound into a variety of shapes, and even made into medium-frequency heating furnaces.

Medium and high frequency control of the heating time, you can grasp the heating temperature, but the copper tube heating ring adaptation has limitations, the size of the workpiece with a large drop heating, must be changed coil, to be equipped with water cooling.

The material of the three coil heaters is different, from the frequency point of view, the frequency of electromagnetic heating is close to super audio, that is, between the medium frequency and the high frequency, only the power frequency heating does not convert.

Third, the selection of coil heater

According to their own use, the required heating temperature and the use of the environment reasonable selection, combined with the before and after the process or supporting, choose the appropriate type, such as aluminum can not choose electromagnetic heating, bearing steel can not choose high frequency and so on, match well to achieve a better heating effect.

Iv. Summary

Through in-depth understanding of its working principle, characteristics, applications and future development, we can better use coil heaters to improve production efficiency, reduce costs, and achieve ideal results.