Electromagnetic heating closed electric furnace

Abstract

The invention provides an electromagnetic heating closed electric furnace, comprising a shell, a panel, a control circuit, an insulation plate and a coil, wherein the longitudinal section of the panel and the longitudinal section of the insulation plate are both n-shaped, and the panel and the insulation plate are provided with round slots under flat plates of the panel and the insulation plate respectively; the round slot of the panel is sleeved in the round slot of the insulation plate; and the coil is a solenoid which is fixedly sleeved out of the wall of the round slot of the insulation plate. The electromagnetic heating closed electric furnace has the advantages and the beneficial effects that the coil generates eddy currents to heat the panel, the panel then serves as a heating element with small thermal inertia, and the panel surface can be heated or cooled down rapidly when being powered on or powered off; the insulation plate has a small thickness and the gap between the panel and the coil is small, so that the electromagnetic heating closed electric furnace has high electromagnetic conversion efficiency and a long service life, saves electric energy better and can be maintained conveniently; and simultaneously, the electric heating is isolated completely, thus improving the safety performance.

Description

technical field [0001] The invention relates to a heating device, in particular to an electromagnetic heating closed electric furnace. Background technique [0002] The closed electric furnace is a heating device widely used in drying, drying and other temperature tests of samples. Heating devices widely used in laboratories in medical and scientific research departments. [0003] The currently used closed electric furnace includes a casing, a control circuit, a panel and a heating element. One type of heating element is an electric heating alloy wire as a heating material, and a mica soft board or an asbestos board is used as an insulating material and placed under the panel; the other type is Electric heating tube, the electric heating tube is cast in the iron plate or welded, inlaid under the iron panel. The heating element is connected to the control circuit, and the control circuit controls the on-off of the current in the heating element or the magnitude of the passi...

AI Technical Summary

Problems solved by technology

Although the safety of this type of closed electric furnace is improved compared with that of the open electric furnace, the heating elements used in it are all resistive elements, not only the thermal efficiency is low, but also the heating element with integrated electric heating is in close contact with the panel and the shell, especially Insulation materials are prone to failure at high temperatures, leading to electrification of the panel, and personal injury accidents are prone to occur

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