Electromagnetic Heater

Electromagnetic heating platform

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purpose

:,220V,50/60HZ,20-40KHZ,380v 50/60HZ10~30KHZ,.

Electromagnetic heater: the electromagnetic heater is a device that uses the principle of electromagnetic induction to convert electric energy into heat energy. The electromagnetic heating controller converts the alternating current of 220V, 50 / 60Hz into direct current, and then converts the direct current into the high-frequency high-voltage electricity with the frequency of 20-40khz, or 380V The 50 / 60Hz three-phase alternating current is converted into direct current, and then the direct current is converted into 10 ~ 30kHz high-frequency low-voltage high current, which is used for heating industrial products.

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Characteristic

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1. Electromagnetic heating ring: the high-frequency and high-voltage current with high-speed change will produce alternating magnetic field with high-speed change when passing through the coil. When the iron container is placed on the top, the surface of the container will have alternating magnetic field lines and alternating current (eddy current) will be generated in the metal part at the bottom of the container. Eddy current makes the carrier at the bottom of the container move at high speed and irregularly, and the carriers collide and rub with each other Heat energy. So as to heat the goods. That is to say, it is a kind of heating method that the electric energy is transformed into magnetic energy to generate induction eddy current on the surface of the heated steel. This way fundamentally solves the problem of low thermal efficiency caused by resistance heating such as electric heater, electric heating coil, etc.

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2. Disadvantages of traditional resistance heating:

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Large heat loss: the existing heating method for enterprises is made of resistance wire, the inner and outer sides of the coil are heated, the heat on the inner side (close to the barrel) is transmitted to the barrel, while the heat on the outer side is mostly lost to the air, resulting in direct loss and waste of electric energy;

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Environmental temperature rise: due to a large amount of heat loss, the ambient temperature rises, especially in summer, which has a great impact on the production environment. Some on-site working temperatures have exceeded 45 degrees, and some enterprises have to use air conditioning to reduce the temperature, which leads to the secondary waste of energy;

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Short service life and large amount of maintenance: due to the use of resistance wire for heating, the heating temperature of the electric heating pipe is as high as about 300 degrees, with large thermal lag, which is not easy to accurately control the temperature, and the resistance wire is easy to burn due to high temperature aging. The service life of common electric heating coils is about half a year, so the maintenance work is relatively large.

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3. Advantages of high frequency heating products:

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Long service life: the coil itself of electromagnetic heating basically does not generate heat, has a long service life, does not need maintenance and replacement cost; the heating part adopts the ring cable structure, the cable itself does not generate heat, and can withstand high temperature above 500 ºC, with a service life of up to 10 years. No maintenance is required, and there is no maintenance cost in the later stage;

 

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Safe and reliable: the outer wall of the barrel is heated by high-frequency electromagnetic action, the heat is fully utilized, and there is basically no loss. The heat is gathered in the heating body, and the surface temperature of the electromagnetic coil is slightly higher than the room temperature, so it can be touched safely without high temperature protection, so it is safe and reliable; high efficiency and energy saving: the internal heat heating mode is adopted, in which part of the heating body directly senses the magnetic energy to generate heat, and the hot start is very fast, the average preheating time is more than 60% shorter than that of the resistance heating mode, and the thermal efficiency is more than 90%, which is the same as that of the resistance heating mode Under the same conditions, it can save 30-70% energy than resistance coil heating, which greatly improves the production efficiency;

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Accurate temperature control: the coil itself does not heat, the thermal block is small, the thermal inertia is low, the temperature inside and outside the barrel is the same, the temperature control is real-time and accurate, the product quality is obviously improved, and the production efficiency is high;

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Good insulation: the electromagnetic coil is made of customized special high temperature and high voltage resistant special cable, with good insulation performance, no need to contact with the outer wall of the tank directly, no leakage, short circuit fault, safety and worry;

 

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Improve the working environment: after the transformation of the electromagnetic heating equipment, the injection molding machine adopts the internal heat mode, the heat is gathered in the inner part of the heating body, and the external heat dissipation is almost No. The surface temperature of the equipment can be improved to human touch, and the ambient temperature can be reduced from above 100 ºC when the original resistance coil is heated to normal temperature, which greatly improves the working environment of the production site, effectively improves the enthusiasm of the production workers, and reduces the cost of ventilation and cooling in the plant area in summer. In line with the concept of "people-oriented", to create an environment-friendly, safe and comfortable production environment for the factory and front-line production personnel.

4,30%-70%?

4. How does the electromagnetic heater save 30% - 70% energy in plastic machinery?

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Compared with resistance heating, the electromagnetic heater has an extra layer of insulation layer, which increases the utilization rate of heat energy.

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Compared with the resistance heating, the electromagnetic heater directly acts on the material pipe heating, reducing the heat loss of heat transfer.

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Compared with resistance heating, the heating speed of electromagnetic heater is more than one quarter faster, reducing the heating time.

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Compared with resistance heating, the heating speed of electromagnetic heater is faster, the production efficiency is improved, the motor is in saturation state, and the power loss caused by high power and low demand is reduced.

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In the traditional heating industry, resistance wire and quartz are commonly used for heating. However, this traditional heating method has a relatively low thermal efficiency. Resistance wire and quartz are mainly heated by themselves after being electrified, and then transfer the heat to the barrel, thus heating the goods. The maximum heat utilization rate of this heating effect is only about 50%, and the other 50% All of them are emitted into the air, and the electric energy loss of all traditional resistance wire heating methods is as high as 50%. By electromagnetic induction heating, the magnetic field is generated by the current, which makes the iron metal pipeline generate heat by itself, plus the heat insulation material, to prevent the heat emission of the pipeline. The heat utilization rate is as high as 95%, and the power saving effect can reach more than 50% in theory. However, considering that the energy conversion efficiency of different quality electromagnetic induction heating controllers is not the same, and different production settings Standby and environment, all electromagnetic heating energy-saving Generally at least 30% can be achieved, and at most 70% can be achieved.