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Electric furnace

A technology of electric furnace and furnace wall, which is applied in the field of heating parts, can solve the problems of insufficient reduction of heat radiation loss, etc., and achieve the effects of preventing local overheating, prolonging service life and improving thermal efficiency

Inactive Publication Date: 2008-08-06
SAKAGUCHI DENNETSU KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical problem to be solved in this paper is that the reduction of thermal radiation loss in the prior art is insufficient

Method used

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  • Electric furnace
  • Electric furnace
  • Electric furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] according to figure 1 and 2 In the present invention shown, the cylindrical helix 5 is formed by winding filaments of heat-resistant material along an ellipse, a part of the cylindrical helix 5 is embedded in the heat-insulating furnace wall 1 formed by ceramic fibers, and the rest of the cylindrical helix 5 A cylindrical portion protrudes from the inner surface of the furnace wall 1, and a rod-shaped heating element 2 formed of a resistive material is inserted into a cylindrical helix 5 and held there.

[0031] In the above embodiment of the present invention, the heating element 2 is held by means of the cylindrical helix 5 formed of a wire of heat-resistant material, which certainly reduces the cost. Specifically, the contact area of ​​the heating element 2 is smaller than that of the cylindrical spiral element 5, so the heat radiation of the heating element 2 becomes larger, and local overheating of the heating element 2 can be prevented, and the service life of t...

Embodiment 2

[0036] In Embodiment 2 of the present invention, the side surface of the heating member 2 is partially embedded in the furnace wall 1 without being held by the columnar spiral member 5, as Image 6 shown.

[0037] In this embodiment, the heat production of the heating element 2 is adjusted by adjusting the volume of the heating element 2 embedded in the furnace wall 1 .

[0038] Preferably, the heating element 2 is embedded in the furnace wall 1, so that more than half of the cross-section of the heating element 2 is exposed in the furnace core, such as Figure 7 As shown, thereby increasing the heat radiation area of ​​the heating element 2 and improving the heating efficiency.

Embodiment 3

[0040] In embodiment 3 of the present invention, as Figure 8 As shown, a rectangular heating element 6 having a long side and a short side in cross-section is used instead of the heating element 2 in Examples 1 and 2, which is inserted into the cylindrical helix 5 and held there , so that the long side surface of the heating element 6 faces the core center of the furnace.

[0041] In this embodiment, the heat radiation area facing the work (not shown) arranged at the center of the core is increased, and the heating efficiency of the heating member 6 can be improved.

[0042] If the ratio of the length of the long side of the heating element 6 to the length of the short side of the heating element 6 can be varied, the heating efficiency of the heating element 6 relative to the workpiece to be heated can be varied. For example, if the length of the long side is increased and the length of the short side is decreased, the heating efficiency can be improved.

[0043] The cross-...

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Abstract

An electric furnace has a furnace wall, a cylindrical spiral member made of a wire of heat resistant material, a part of the cylindrical portion of which being embedded into the furnace wall and the remaining cylindrical portion of which being projected from an inner surface of the furnace wall, and a heating member inserted into the remaining cylindrical portion of the spiral member. The wire is wound along circles, ellipses, triangles, or quadrangles. The heating member has a circular, quadrangular, triangular or elliptical cross section.

Description

technical field [0001] The present invention relates to an electric furnace and, more particularly, to an electric furnace which can conveniently and absolutely maintain a heating element with a small heat loss. Background technique [0002] Japanese Patent Application No. 183238 / 1995 discloses a support structure for a heating element of an electric furnace. [0003] Figure 12 A perspective view of a part of a conventional electric stove is shown with another part cut away. [0004] Figure 13 show Figure 12 Perspective view of a portion of the electric furnace shown. [0005] Reference numeral 1 denotes a heat-insulating cylindrical furnace wall, 2 denotes a heating element of a resistance wire wound helically along the inner edge surface of the heat-insulating cylindrical furnace wall 1, and 3 denotes a plurality of wire supports fixed on On the inner edge surface of the furnace wall so as to be separated from each other by a predetermined space along the circumferen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D11/02F27D23/00H05B3/06F27B3/20F27D99/00H05B3/66
CPCH05B3/66F27B3/20F27D11/02
Inventor 坂口功田中祯祥
Owner SAKAGUCHI DENNETSU KK