JPH05198370A - Induction heating coil - Google Patents

Abstract

PURPOSE:To enhance the output of a coil and improve heating performance by forming a passage for coil cooling fluid, and cooling a coil winding part and a permeable material. CONSTITUTION:A passage 3 for coil cooling fluid is formed between an induction heating flat coil 1 and a leak magnetic flux preventing highly permeable material base 2, and a high speed fluid 7 is passed through the passage to cool the flat coil 1 and the highly permeable material base 2. Thus, the heat accumulation of the high permeable material base 2 by the Joule heating resulted from the surface effect and neighborhood effect of the flat coil 1 is prevented. Thus, the heating output of the flat coil can be raised to the cooling limit of the high speed fluid, and the heating control performance and heating output limit to a material 6 to be heated can be increased to enhance the heating performance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating coil for controlling the moisture content and controlling the heating of a metal body to be heated such as an electromagnetic cooker or another object that comes into contact therewith.

[0002]

2. Description of the Related Art In a conventional induction heating coil for controlling a moisture content control, an electromagnetic cooker or the like, and a heating control of a metal object to be heated or another object in contact, a flat coil is placed close to the metal object to be heated. When they are arranged and induction heating is performed, a magnetic permeable material is applied or adhered to the coil in order to reduce magnetic loss, so that the structure prevents leakage magnetic flux.

[0003]

In the structure of the conventional induction heating coil described above, when the output or the current is increased, the Joule heat increases due to the skin effect and the proximity effect of the coil itself. Cooling is difficult because the porcelain heats up.

Further, for the same reason, since it is difficult to mold, it is difficult to form a protective structure against the external environment, resulting in low reliability and high risk.

The present invention has been made in view of the above circumstances, and an object of the present invention is to increase the output of a coil by making it possible to cool the coil winding portion and the magnetic permeable material.
An object is to provide an induction heating coil capable of improving heating performance.

[0006]

That is, according to the present invention, a passage for the coil cooling fluid is formed between the coil winding portion and the high magnetic permeability material base. By preventing the temperature rise in the base, the heating output in the coil can be increased to its cooling limit,
The heating control performance for the object to be heated and the heating output limit can be greatly increased.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows its cross-sectional structure. Reference numeral 1 is a flat coil for induction heating, 2 is a highly permeable material base for preventing leakage flux in the flat coil 1, and 3 is the flat coil 1 described above. , A cooling passage formed between the high magnetic permeability base 2 and the high magnetic permeability material base 2 protects the flat coil 1 and the high permeability magnetic material base 2 from the external environment, and the resin case 5 in which the cooling moisture path 3 is formed is the flat shape. An inverter driver that applies an AC electromotive force to the coil 1 to mainly generate heat due to an eddy current, 6 is a heated object that is induction-heated by the flat coil 1, and 7 is a high magnetic permeability that passes through the cooling path 3 at high speed. It is a high-speed fluid that cools the material base 2 and the flat coil 1.

FIG. 2 shows a sectional structure taken along the line II-II of FIG. 1, in which the high-speed fluid 7 passes through the cooling passage 3 so that a large current is passed through the flat coil 1 to cause the flat coil 1 to flow. Due to the skin effect and the proximity effect of itself, the Joule heat is increased, and even if the highly magnetic permeable material base 2 stores heat, it can be immediately cooled.

Therefore, the heating output of the flat coil 1 can be increased up to the cooling limit of the high-speed fluid 7 passing through the cooling passage 3, and the heating control performance and the heating output limit of the object 6 to be heated are greatly improved. It becomes possible.

[0011]

As described above, according to the present invention, since the passage for the coil cooling fluid is formed between the coil winding portion and the highly permeable material base, the highly permeable material base is provided. It is possible to provide an induction heating coil capable of increasing the heating output of the coil up to its cooling limit by preventing the temperature rise at the temperature, and significantly increasing the heating control performance for the object to be heated and the heating output limit. .

[Brief description of drawings]

FIG. 1 is a diagram showing a cross-sectional structure according to an embodiment of the present invention.

FIG. 2 is a diagram showing a sectional structure taken along line II-II in FIG.

[Explanation of symbols]

1 ... Flat coil, 2 ... Highly permeable material base, 3 ... Cooling path, 4
... Resin case, 5 ... Inverter driver, 6 ... Object to be heated, 7 ... High-speed fluid.

Claims (1)

[Claims] 1. An induction heating coil winding portion, a high-permeability material base provided near the coil winding portion to prevent a leakage magnetic flux of the coil winding portion, the coil winding portion and the high-permeability material. An induction heating coil having a passage for a coil cooling fluid formed between bases.