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Induction heating is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, through heat generated in the object by eddy currents. An induction heater consists of an electromagnet, and an electronic oscillator that passes a high-frequency alternating current (AC) through the electromagnet. The rapidly alternating magnetic field penetrates the object, generating electric currents inside the conductor called eddy currents. The eddy currents flowing through the resistance of the material heat it by Joule heating. In ferromagnetic (and ferrimagnetic) materials like iron, heat may also be generated by magnetic hysteresis losses. The frequency of current used depends on the object size, material type, coupling (between the work coil and the object to be heated) and the penetration depth.
Medium-frequency induction heating furnace body, furnace body manufacturing method and temperature control method
PendingCN111761020AImprove temperature measurement accuracySimple manufacturing processLinings repairForge furnacesEngineeringHeating furnace
The invention relates to the technical field of medium-frequency induction heating furnaces, in particular to a medium-frequency induction heating furnace body, a furnace body manufacturing method anda temperature control method. The medium-frequency induction heating furnace body comprises a furnace lining, a material channel allowing a blank to pass through is formed in the middle of the furnace lining, and an induction coil which extends in axial direction of the material channel and is spirally wound on outer side of the material channel is arranged in the furnace lining; and a pluralityof temperature measuring holes are formed in the side wall of the furnace lining in the axial direction of the furnace lining at intervals, the temperature measuring holes are formed in the radial direction of the furnace lining and penetrate through the side wall of the furnace lining, and the temperature measuring holes are located at the intervals between every two adjacent turns of coils of the induction coil. The invention further provides a manufacturing method of the medium-frequency induction heating furnace body and a temperature control method of the medium-frequency induction heating furnace. According to the furnace body, the temperature measuring holes are formed in the side wall of the furnace body for temperature measurement instead of adopting the temperature measurement mode at a discharge port so that the temperature measurement accuracy can be improved.
Owner:HANGZHOU KEYUAN ELECTRIC FURNACE CO LTD