Electromagnetic heaters use electromagnetic induction heating principles to convert electrical energy into thermal energy. First, 50 Hz alternating current is converted into direct current, and then the PFM control circuit converts the direct current conversion to a high-frequency high voltage of 17-30 kHz, and the high-speed changed current is generated through the coil. When the magnetic field is generated, when the magnetic field The inner magnetic lines are generated in the heated metal object in the heated metal object, so that the heated metal object itself is generated at high speed.
Most plastic products, plastic films, plastic granulation, drawing injection molding, pipe and other production enterprises are heated by electric heating tubes and dielectric, so that the plastic raw material is melted after plasticizing, stretching Extruded into a product. There is the following questions:
1. The heat loss is high: the existing enterprises use the heating cooker, which causes the loss of electricity to have a lot of waste.
2, the ambient temperature rises: due to a large amount of heat, the surrounding ambient temperature is rising, especially in summer, the production environment is much affected, and some of the working temperature exceeds 45 ° C, some companies have to use air conditioning to reduce temperature, this is caused Energy secondary waste.
3, short service life, maintenance amount: due to the use of resistance wire, the heating temperature is as high as 800 ° C, the resistance wire is easily burnt due to high temperature aging, the usual electric heating ring service life is about half a year, so the workload of maintenance relatively bigger. By the resistance wire, the inside and outside of the circle is hot, and the heat conducted in the inner surface (close to the cartridge portion) is onto the cartridge, and the heat of the outside is largely dispersed into the air.
