JP2010108605A - High-frequency induction heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-frequency induction heating device capable of heating with uniform temperature distribution with a simple construction. <P>SOLUTION: The high-frequency induction heating device is provided with: a first ferrite core of a U-shaped formation composed of convex portions formed projected at both ends of in a conveyance direction crossing a width direction of a plate type conductive material and a coupling portion to connect the convex portions, arranged along a width direction of the plate type conductive material with the same length as the width direction of the plate type conductive material; and a second ferrite core of a U-shaped formation composed of convex portions formed projected at both ends of in a conveyance direction crossing a width direction of a plate type conductive material and a coupling portion to connect the convex portions, arranged along a width direction of the plate type conductive material with the same length as the width direction of the plate type conductive material, and also arranged to keep a predetermined spacing from the first ferrite core, with each of the convex portions at both ends arranged opposed. At least either the first or the second ferrite core has a pair of swollen portions formed near both end faces of the same in a width direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a high-frequency induction heating device, and more specifically, a plate-shaped conductive material (in this specification, “plate-shaped conductive material” is simply referred to as “plate-shaped conductive material” as appropriate. The present invention relates to a high-frequency induction heating apparatus suitable for use in heating.

  Conventionally, when heating an object to be heated having various shapes, for example, a plate-like conductive material, the plate-like conductive material is a non-magnetic material such as aluminum or stainless steel, or a magnetic material that exceeds the Curie temperature. In the case of a body material, generally, a high-frequency induction heating apparatus having a structure (transverse structure) in which induction coils are arranged above and below the plate-like conductive material has been used.

  In a high-frequency induction heating apparatus having this transverse structure (in this specification, “a high-frequency induction heating apparatus having a transverse structure” is simply referred to as a “transverse high-frequency induction heating apparatus” as appropriate). The plate-like conductive material is heated by the magnetic flux generated by the induction coils arranged above and below the plate-like conductive material penetrating the plate-like conductive material.

Here, FIG. 1 (a) shows a perspective view of a conceptual configuration of a conventional transverse high frequency induction heating apparatus, and FIG. 1 (b) shows an AA line in FIG. 1 (a). The cross-sectional structure explanatory drawing by is shown.

  This conventional transverse high-frequency induction heating device 10 is formed to have the same length as the length L1 in the width direction of the plate-like conductive material 12 in the longitudinal direction, and allows the plate-like conductive material 12 to pass therethrough. A ferrite core 14 and a ferrite core 16 which are a pair of magnetic members disposed opposite to each other with a gap g1 therebetween and a high-frequency current generated by a high-frequency oscillator (not shown) is a line that conducts. The induction coil 18, the induction coil 20, the induction coil 22, and the induction coil 24 are configured to be fed with a high-frequency current from the high-frequency oscillator via a feeder (not shown).

  The predetermined gap g1 is determined by the thickness of the plate-like conductive material 12, the fluctuation of the upper and lower positions of the plate-like conductive material, or the heating efficiency.

More specifically, the ferrite core 14 and the ferrite core 16 have the concave and convex surfaces having a U-shaped cross section facing each other, and the longitudinal direction of the ferrite core 14 and the ferrite core 16 is the transport direction of the plate-like conductive material 12. The plate-like conductive material 12 is conveyed in the gap g1 formed by the ferrite core 14 and the ferrite core 16.

  In addition, the induction coil 18 is disposed so as to surround the convex portion 14 a of the ferrite core 14, the induction coil 20 is disposed so as to surround the convex portion 14 b of the ferrite core 14, and the induction coil 22 is disposed in the ferrite core 16. The induction coil 24 is disposed so as to surround the convex portion 16 b of the ferrite core 16.

In the above configuration, when a high-frequency current is fed from the high-frequency oscillator to the induction coil 18, induction coil 20, induction coil 22, and induction coil 24 of the transverse high-frequency induction heating device 10, the induction coil 18, induction The magnetic flux generated by the coil 20, the induction coil 22, and the induction coil 24 penetrates the plate-like conductive material 12 passing through the predetermined gap g1, thereby inducing eddy currents on the surface of the plate-like conductive material 12. Thus, the plate-like conductive material 12 is heated.

Here, FIG. 2 shows a temperature distribution in the width direction of the plate-like conductive material 12 heated in such a conventional transverse type high frequency induction heating apparatus 10.

  As shown in FIG. 2, in the conventional transverse type high frequency induction heating apparatus 10, a portion having a low temperature is generated in the vicinity of both ends in the width direction of the plate-like conductive material 12.

  That is, a low temperature part is generated near the point P near one end in the width direction of the plate-like conductive material 12, and a low temperature part is generated near the point Q near the other end.

  For example, when the length L1 of the plate-like conductive material 12 in the width direction is 400 to 500 mm, the low-temperature portions generated in the vicinity of both ends in the width direction of the plate-like conductive material 12 are the respective end portions. From 50 to 100 mm.

Thus, according to the conventional transverse type high frequency induction heating apparatus, the temperature distribution of the plate-like conductive material is caused by the occurrence of a low temperature portion in the vicinity of both ends in the width direction of the plate-like conductive material. There was a problem that the homogenization of the film was hindered.

The prior art that the applicant of the present application knows at the time of filing a patent is as described above and is not an invention related to a known literature, so there is no prior art information to be described.

  The present invention has been made in view of the various problems of the prior art as described above, and the object of the present invention is to enable heating with a uniform temperature distribution with a simple configuration. A high frequency induction heating apparatus is to be provided.

  In order to achieve the above object, a high-frequency induction heating apparatus according to the present invention has a plate-like conductive material in a gap formed by a pair of U-shaped ferrite cores with the concave and convex surfaces of the ferrite cores facing each other. And at least one pair of bulging portions are formed in the vicinity of both end surfaces in the width direction of the opposing surfaces of the convex portions of the ferrite core. .

  In order to achieve the above object, the high-frequency induction heating apparatus according to the present invention includes a pair of U-shaped ferrite cores formed by connecting U-shaped magnetic materials without gaps, and the uneven surfaces of a pair of U-shaped ferrite cores. When the plate-like conductive material is allowed to pass through the gap formed by the opposed ferrite cores, a pair of magnetic materials positioned near both end faces in the width direction is more than the other magnetic materials. It is arranged close to the plate-like conductive material.

  Here, when forming a pair of bulges or arranging a pair of magnetic materials closer to the plate-like conductive material than other magnetic materials, the vicinity of both end faces in the width direction Is a low temperature portion (hereinafter simply referred to as “prior art low temperature portion”) near both ends in the width direction of the plate-like conductive material shown in FIG. 2 which is generated when a conventional high frequency induction heating apparatus is used. ) Is preferable.

That is, the invention according to claim 1 of the present invention is a high-frequency induction heating apparatus having a transverse structure in which a plate-like conductive material is induction-heated by a high-frequency current. A U-shape configured to have a protruding portion protruding at both ends in the direction and a connecting portion for connecting the protruding portion, and a length equal to the length in the width direction of the plate-like conductive material A first ferrite core disposed along the width direction of the plate-like conductive material and having a first induction coil disposed at the connecting portion; and the width direction of the plate-like conductive material; A U-shape configured to have a protruding portion protruding at both ends in the orthogonal conveying direction and a connecting portion that connects the protruding portion, and the length in the width direction of the plate-like conductive material Have the same length in the width direction of the plate-like conductive material A second induction coil is disposed at the connecting portion, and a predetermined interval is provided between the first ferrite core and the plate-like conductive material so that the plate-like conductive material can be conveyed. A second ferrite core disposed so that the convex portions face each other, and at least one of the first ferrite core and the second ferrite core in the width direction of the one At least one pair of bulges is formed in the vicinity of both end faces.

  The invention according to claim 2 of the present invention is a high-frequency induction heating apparatus having a transverse structure in which a plate-like conductive material is induction-heated by a high-frequency current, and is transported perpendicular to the width direction of the plate-like conductive material. A U-shape configured to have a protruding portion protruding at both ends in the direction and a connecting portion for connecting the protruding portion, and a length equal to the length in the width direction of the plate-like conductive material A first ferrite core disposed along the width direction of the plate-like conductive material and having a first induction coil disposed at the connecting portion; and the width direction of the plate-like conductive material; A U-shape configured to have a protruding portion protruding at both ends in the orthogonal conveying direction and a connecting portion that connects the protruding portion, and the length in the width direction of the plate-like conductive material Have the same length in the width direction of the plate-like conductive material A second induction coil is disposed at the connecting portion, and a predetermined interval is provided between the first ferrite core and the plate-like conductive material so that the plate-like conductive material can be conveyed. A second ferrite core disposed so that the convex portions face each other, and bulges in the vicinity of both end faces in the width direction with respect to each of the first ferrite core and the second ferrite core. At least one pair of protruding portions is formed.

  According to a third aspect of the present invention, in the first aspect of the present invention, the bulging portion includes at least one of the first ferrite core and the second ferrite core. Either one of the side surfaces extending in the longitudinal direction is formed in the vicinity of the plate-like conductive material conveyed within the predetermined interval.

  The invention according to claim 4 of the present invention is the invention according to claim 1 of the present invention. In the invention according to claim 1, the bulging portion includes the first ferrite core and the first ferrite core. It is formed on at least one facing surface of at least any one of the convex portions at both ends facing the second ferrite core.

  Further, the invention according to claim 5 of the present invention is the invention according to claim 2 of the present invention, wherein the bulging portion is a longitudinal direction of the first ferrite core and the second ferrite core. In the side surface extended to the above, it is formed in the vicinity of the plate-like conductive material conveyed within the predetermined interval.

  The invention according to claim 6 of the present invention is the invention according to claim 2 of the present invention, wherein the bulging portion is opposed to the first ferrite core and the second ferrite core. And formed on at least one of the opposing surfaces of the convex portions at both ends.

  The invention according to claim 7 of the present invention is the invention according to any one of claims 1, 2, 3, 4, 5 or 6 of the present invention, wherein the bulging portion is a predetermined It is formed by adhering a magnetic body of the shape.

  According to an eighth aspect of the present invention, in a high frequency induction heating apparatus having a transverse structure that inductively heats a plate-like conductive material with a high frequency current, U-shaped magnetic materials are continuously arranged without gaps. Forming a U-shape configured to have a protruding portion protruding at both ends in the conveying direction orthogonal to the width direction of the plate-like conductive material and a connecting portion that connects the protruding portion; and A first conductive coil having a length equal to the length in the width direction of the plate-shaped conductive material and disposed along the width direction of the plate-shaped conductive material, and a first induction coil disposed at the connecting portion. The ferrite core and U-shaped magnetic material are connected without gaps, and the projections formed at both ends in the conveying direction perpendicular to the width direction of the plate-like conductive material are connected to the projections. A U-shape configured with a portion, and the above The plate-shaped conductive material has a length equal to the width direction of the plate-shaped conductive material and is disposed along the width direction of the plate-shaped conductive material. A second ferrite core disposed so that the convex portions at both ends face each other with a predetermined interval between which the plate-like conductive material can be conveyed between the ferrite core and the one ferrite core, At least one pair of magnets located in the vicinity of both end faces in the width direction of at least one of the magnetic material constituting the first ferrite core and the magnetic material constituting the second ferrite core The material is arranged closer to the plate-like conductive material than the other magnetic materials.

  According to a ninth aspect of the present invention, in a high frequency induction heating apparatus having a transverse structure in which a plate-like conductive material is induction heated by a high frequency current, U-shaped magnetic materials are continuously arranged without any gaps. Forming a U-shape configured to have a protruding portion protruding at both ends in the conveying direction orthogonal to the width direction of the plate-like conductive material and a connecting portion that connects the protruding portion; and A first conductive coil having a length equal to the length in the width direction of the plate-shaped conductive material and disposed along the width direction of the plate-shaped conductive material, and a first induction coil disposed at the connecting portion. The ferrite core and U-shaped magnetic material are connected without gaps, and the projections formed at both ends in the conveying direction perpendicular to the width direction of the plate-like conductive material are connected to the projections. A U-shape configured with a portion, and the above The plate-shaped conductive material has a length equal to the width direction of the plate-shaped conductive material and is disposed along the width direction of the plate-shaped conductive material. A second ferrite core disposed so that the convex portions at both ends face each other with a predetermined interval between which the plate-like conductive material can be conveyed between the ferrite core and the one ferrite core, Regarding each of the magnetic material constituting the first ferrite core and the magnetic material constituting the second ferrite core, at least one pair of magnetic materials located in the vicinity of both end faces in the width direction is replaced with another magnetic material. Rather than the plate-like conductive material.

  According to a tenth aspect of the present invention, in the invention according to any one of the eighth or ninth aspects of the present invention, the magnetic material constituting the first ferrite core and the first Each of the magnetic materials constituting the ferrite core 2 has the same shape, and at least one pair of magnetic materials located in the vicinity of the both end faces and the other magnetic materials are arranged so as to be shifted. Is.

  Since the present invention is configured as described above, there is an excellent effect that heating can be performed with a uniform temperature distribution with a simple configuration.

  Hereinafter, an example of an embodiment of a high-frequency induction heating device according to the present invention will be described in detail with reference to the accompanying drawings.

  In the following description, the same or equivalent components as those of the conventional high-frequency induction heating apparatus described with reference to FIGS. 1A and 1B are denoted by the same reference numerals as those used above. Accordingly, the detailed configuration and description of the operation will be omitted as appropriate.

First, a first embodiment of a high-frequency induction heating device according to the present invention will be described with reference to FIGS.

  That is, FIG. 3 (a) shows a schematic configuration perspective view of the high-frequency induction heating device according to the first embodiment of the present invention, and FIG. 3 (b) shows FIG. 3 (a). A cross-sectional configuration explanatory view taken along line BB is shown, and FIG. 4 is a view taken in the direction of arrow C in FIG.

  The high-frequency induction heating device 30 shown in FIGS. 3 (a), 3 (b) to 4 is a transverse type high-frequency induction heating device that is opposed to each other with a predetermined gap g1 through which the plate-like conductive material 12 passes. A ferrite core 14 and a ferrite core 16 having a U-shaped cross section, which are a pair of magnetic members, and a magnetic body 32, a magnetic body 34, and a magnetic body 36 bonded to the ferrite core 14 and the ferrite core 16 as bulges. The induction coil 40 and the induction coil 40 are fed with a high-frequency current from the high-frequency oscillator through a feeder (not shown) as a line that conducts the high-frequency current generated by the magnetic body 38 and a high-frequency oscillator (not shown). And a coil 42.

  The predetermined gap g1 is determined by the thickness of the plate-like conductive material 12, the vertical position fluctuation of the plate-like conductive material 12, or the heating efficiency.

More specifically, the ferrite core 14 and the ferrite core 16 have the concave and convex surfaces having a U-shaped cross section facing each other, and the longitudinal direction of the ferrite core 14 and the ferrite core 16 is the transport direction of the plate-like conductive material 12. The plate-like conductive material 12 is conveyed in the gap g1 formed by the ferrite core 14 and the ferrite core 16.

  The induction coil 40 is disposed so as to surround the connecting portion 14c that connects the convex portion 14a and the convex portion 14b of the ferrite core 14. Similarly, the induction coil 42 includes the convex portion 16a and the convex portion of the ferrite core 16. It arrange | positions so that the connection part 16c which connects 16b may be enclosed.

  Further, the magnetic body 32 and the magnetic body 34 paired with the magnetic body 32 are bonded to the outer surface 14aa of the convex portion 14a of the ferrite core 14, and the magnetic body 36 and the magnetic body 38 paired with the magnetic body 36 are formed of a ferrite core. It adheres to the outer surface 16aa of the convex portion 16a of the ferrite core 16 facing the 14 convex portions 14a.

Here, the position where the magnetic body 32, the magnetic body 34, the magnetic body 36 and the magnetic body 38 in the longitudinal direction of the ferrite core 14 and the ferrite core 16 are bonded is the same as that of the conventional high frequency in the longitudinal direction of the ferrite core 14 and the ferrite core 16. The position corresponding to the low temperature part of the prior art which is a low temperature part in the vicinity of both ends in the width direction of the plate-like conductive material 12 shown in FIG. 2 generated when the induction heating device 10 is used.

  Further, the positions where the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38 in the height direction of the ferrite core 14 and the ferrite core 16 with respect to the plate-like conductive material 12 are bonded to each other due to physical interference. The lower surface 32a of the magnetic body 34 and the lower surface 34a of the magnetic body 34 are at the same height as the facing surface 14e of the convex portion 14a of the ferrite core 14 facing the convex portion 16a of the ferrite core 16, and the upper surface 36a of the magnetic body 36 and the magnetic body 38 The upper surface 38a is set at the same height as the facing surface 16e of the convex portion 16a of the ferrite core 16 facing the convex portion 14a of the ferrite core 14.

  Further, the sizes of the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38 depend on the material, thickness, or temperature distribution of the plate-like conductive material 12 (particularly, both in the width direction of the plate-like conductive material 12). It is assumed that the temperature can be appropriately changed based on the low temperature portion generated in the vicinity of the end portion.

More specifically, the magnetic body 32 has the plate-like conductivity shown in FIG. 2 that occurs when the conventional high-frequency induction heating device 10 is used in the longitudinal direction of the ferrite core 14 on the outer surface 14aa of the convex portion 14a of the ferrite core 14. The material 12 is bonded to a position corresponding to the point P of the low temperature portion near one end in the width direction, that is, the point P of the low temperature portion of the prior art.

  Further, the magnetic body 34 paired with the magnetic body 32 is shown in FIG. 2 that is generated when the conventional high-frequency induction heating apparatus 10 is used in the longitudinal direction of the ferrite core 14 on the outer surface 14aa of the convex portion 14a of the ferrite core 14. The plate-like conductive material 12 is bonded to a position corresponding to the point Q of the low temperature portion in the vicinity of the other end in the width direction, that is, the point Q of the conventional low temperature portion.

  Further, the magnetic body 36 is formed of the plate-like conductive material 12 shown in FIG. 2 that is generated when the conventional high-frequency induction heating device 10 is used in the longitudinal direction of the ferrite core 16 on the outer surface 16aa of the convex portion 16a of the ferrite core 16. It is bonded to a position corresponding to the point P of the low temperature part near one end in the width direction, that is, the point P of the low temperature part of the prior art.

  Moreover, the magnetic body 38 which makes a pair with the magnetic body 36 is shown in FIG. 2 which is generated when the conventional high frequency induction heating apparatus 10 is used in the longitudinal direction of the ferrite core 16 on the outer surface 16aa of the convex portion 16a of the ferrite core 16. The plate-like conductive material 12 is bonded to a position corresponding to the point Q of the low temperature portion in the vicinity of the other end in the width direction, that is, the point Q of the conventional low temperature portion.

Specifically, for example, when the length L2 in the longitudinal direction of the ferrite core 14 and the ferrite core 16 is 480 to 600 mm, the length L3 in the width direction is 60 to 90 mm, and the length L4 in the height direction is 45 mm, The rectangular parallelepiped magnetic body 32 having a length L5 in the direction of 30 mm, a length L6 in the lateral direction of 60 mm, and a length L7 in the thickness direction of 15 mm is positioned 50 to 80 mm from one end face 14d of the ferrite core 14. The lower surface 32a is bonded so as to be at the same height as the facing surface 14e of the convex portion 14a facing the convex portion 16a, and the longitudinal length L5 is 30 mm, the lateral length L6 is 60 mm, and the thickness direction The rectangular parallelepiped magnetic body 34 having a length L7 of 15 mm is located at a position 50 to 80 mm from the other end face 14f of the ferrite core 14 and is opposed to the convex portion 14a with the lower surface 34a facing the convex portion 16a. 14e, and a magnetic material 36 of a rectangular parallelepiped having a longitudinal length L5 of 30 mm, a lateral length L6 of 60 mm, and a thickness direction length L7 of 15 mm is a ferrite. The bottom surface 36a is bonded to a position 50 to 80 mm from one end surface 16d of the core 16 so that the lower surface 36a is at the same height as the facing surface 16e of the projecting portion 16a facing the projecting portion 14a, and the length L5 in the vertical direction Is a rectangular parallelepiped magnetic body 38 having a length L6 of 30 mm, a lateral length L6 of 60 mm, and a thickness direction length L7 of 15 mm. Bonding is performed so as to be at the same height as the facing surface 16e of the convex portion 16a facing 14a.

  Note that the appropriate sizes of the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38, and the appropriate positions for bonding them to the ferrite core 14 and the ferrite core 16 are experimentally repeated, for example. Can be requested.

In the above configuration, when a high-frequency current is supplied from the high-frequency oscillator to the induction coil 40 and the induction coil 42 of the transverse high-frequency induction heating device 30 through the feeder, the magnetic flux generated by the induction coil 40 and the induction coil 42 is a predetermined value. The plate-like conductive material 12 that passes through the gap g1 is penetrated, whereby an eddy current is induced in the plate-like conductive material 12 and the plate-like conductive material 12 is heated.

Here, eddy currents induced on the surface of the plate-like conductive material 12 by the transverse high-frequency induction heating device 30 will be described. For example, as shown in FIG. 5 (a), the eddy currents are formed by the convex portions 14a and 16a of the ferrite core 14 facing each other and the convex portions 14b and the ferrite core 14 of the ferrite core 14 facing each other. It is generated so as to go around the 16 convex portions 16b and to concentrate in the vicinity of the region where the magnetic bodies 32, 34, 36, 38 are bonded.

  In FIG. 5 (a), in order to simplify the illustration and facilitate understanding of the present invention, the illustration of the connecting portion 14c for connecting the two convex portions 14a and the convex portions 14b in the ferrite core 14 is omitted. In addition, illustration of the connecting portion 16c that connects the two convex portions 16a and the convex portions 16b in the ferrite core 16 is omitted.

That is, the eddy current induced in the plate-like conductive material 12 will be described with reference to FIG. 5A. With respect to the ferrite core 14, the convex portion 14b where the magnetic body 32 and the magnetic body 34 are not bonded is used. On the other hand, the eddy current is generated in a wide range while rotating in the clockwise direction with respect to the convex portion 14b, whereas in the convex portion 14a in which the magnetic body 32 and the magnetic body 34 are bonded, Eddy currents generated while rotating in the counterclockwise direction are concentrated near the area where the magnetic body 32 and the magnetic body 34 are bonded.

  Similarly, with respect to the ferrite core 16, in the convex portion 16b where the magnetic body 36 and the magnetic body 38 are not bonded, an eddy current is generated in a wide range while rotating in the clockwise direction with respect to the convex portion 16b. On the other hand, in the convex portion 16a in which the magnetic body 36 and the magnetic body 38 are bonded, eddy currents generated in a wide range while rotating in the counterclockwise direction with respect to the convex portion 16a are generated in the magnetic body 36 and the magnetic body 38. It becomes concentrated in the vicinity of the bonded area.

  Thus, in the space S1 sandwiched between the convex portion 14a of the ferrite core 14 and the convex portion 16a of the ferrite core 16, the space S2 sandwiched between the convex portion 14b of the ferrite core 14 and the convex portion 16b of the ferrite core 16 is provided. Rather, the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38 in the width direction of the plate-like conductive material 12 are more effectively heated at a position corresponding to the position where the magnetic body 32 is bonded (FIG. (See 5 (b)).

  That is, in the transverse type high frequency induction heating device 30, eddy currents concentrate in the vicinity of the region corresponding to the position where the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38 of the plate-like conductive material 12 are bonded. Accordingly, the position corresponding to the position where the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38 are bonded, that is, the plate-like conductive material 12 generated when the conventional high-frequency induction heating device 10 is used. Since heating is performed more efficiently in the prior art low-temperature part, which is the low-temperature part in the vicinity of both ends in the width direction, the low-temperature part is not generated in the width direction of the plate-like conductive material 12, and the plate shape The temperature distribution of the conductive material 12 can be made uniform.

  That is, according to the transverse type high frequency induction heating device 30, the magnetic body 32 and the magnetic body 34 are bonded to the outer surface 14aa of the convex portion 14 a of the ferrite core 14 at a position corresponding to the low temperature portion of the prior art, and the convexity of the ferrite core 16 is By adhering the magnetic body 36 and the magnetic body 38 to a position corresponding to the conventional low temperature portion on the outer surface 16aa of the portion 16a, eddy currents induced on the surface of the plate-like conductive material 12 are caused to cause the magnetic body 32 and the magnetic body 34. The magnetic body 36 and the magnetic body 38 are concentrated at the bonded position, and the position where the magnetic body 32, the magnetic body 34, the magnetic body 36 and the magnetic body 38 are bonded in the plate-like conductive material 12, that is, The prior art low temperature part in the plate-like conductive material 12 is effectively heated, and the generation of the low temperature part in the width direction of the plate-like conductive material 12 is eliminated. It is possible to uniform the temperature distribution when heating the plate-shaped conductive material 12.

Next, the results of experiments conducted by the inventors of the present invention using the above-described transverse type high frequency induction heating device 30 will be described in detail.

In this experiment, the ferrite core 14 and the ferrite core 16 provided opposite to each other are heated in a high frequency induction heating apparatus in which only a pair of magnetic bodies are provided and a high frequency induction heating apparatus in which three pairs of magnetic bodies are provided. The temperature distribution of the conductive material 12 was measured.

  As specific experimental conditions, in the high frequency induction heating apparatus provided with only one pair of magnetic bodies, the length L2 in the longitudinal direction of the ferrite core 14 and the ferrite core 16 is 480 mm, the length L3 in the width direction is 60 mm, and the height direction. The length L4 is 45 mm, the length L5 in the vertical direction is 30 mm, the length L6 in the horizontal direction is 60 mm, and the length L7 in the thickness direction is 15 mm. The magnetic body 34 having the same size as the magnetic body 32 is bonded to a position 70 mm from the end face 14d, and the other end face 14f of the convex portion 14a of the ferrite core 14 is bonded to a position 70 mm. The induction coil 40 and the induction coil 42 are respectively Winding around the connecting portion 14c between the convex portion 14a and the convex portion 14b of the ferrite core 14 and the connecting portion 16c between the convex portion 16a and the convex portion 16b of the ferrite core 16 (See FIGS. 6 (a) and 6 (b)), SST-40 (manufactured by Shimada Rika Kogyo Co., Ltd.) is used as the high frequency oscillator, the oscillation frequency is 18 kHz, the output transformer is 5: 2, the capacitor is 5.16 μF * (1p ) * 1s (“Capacitor 5.16 μF * (1p) * 1 s” means that one capacitor having a capacitance of 5.16 μF is connected in parallel, and one capacitor connected in parallel is connected in series. The temperature distribution in the aluminum foil was measured by thermography when an aluminum foil having a thickness of 100 μm was conveyed at a conveyance speed of 4.5 m / min as the plate-like conductive material 12 and was subjected to high-frequency induction heating.

  Further, in the high-frequency induction heating apparatus provided with three pairs of magnetic bodies, the length L2 in the longitudinal direction of the ferrite core 14 and the ferrite core 16 is 480 mm, the length L3 in the width direction is 60 mm, and the length L4 in the height direction is 45 mm. A magnetic body 32 having a longitudinal length L5 of 30 mm, a lateral length L6 of 60 mm, and a thickness direction length L7 of 15 mm is positioned 50 mm from one end face 14d of the convex portion 14a of the ferrite core 14. The magnetic body 34 having the same size as the magnetic body 32 is bonded to the position of 50 mm from the other end face 14f of the convex portion 14a of the ferrite core 14, and the magnetic body 36 having the same size as the magnetic body 32 is bonded to the ferrite core 16. The magnetic body 38 having the same size as that of the magnetic body 32 is bonded to a position 50 mm from one end 16d of the convex portion 16a, and the other end 16f of the convex portion 16a of the ferrite core 16 is attached. The magnetic body 72 having the same size as the magnetic body 32 is bonded to a position of 50 mm, and the magnetic body 74 having the same size as the magnetic body 32 is bonded to the position of 50 mm from one end 14g of the convex portion 14b of the ferrite core 14. The protrusion 14b of the ferrite core 14 is bonded to a position 50 mm from the other end 14h, and the induction coil 40 and the induction coil 42 are connected to the connection 14c between the protrusion 14a and the protrusion 14b of the ferrite core 14 and the ferrite core 16, respectively. It is wound around a connecting portion 16c between the convex portion 16a and the convex portion 16b (see FIGS. 7A and 7B), and an SST-40 (manufactured by Shimada Rika Kogyo Co., Ltd.) is used as a high frequency oscillator. 18 kHz, output transformer 5: 2, capacitor 5.16 μF * (1p) * 1 s (“capacitor 5.16 μF * (1p) * 1 s” is 5.16 μF capacity) This indicates that one capacitor is connected in parallel and one capacitor connected in parallel is connected in series.) As the plate-like conductive material 12, an aluminum foil having a thickness of 100 μm is transported at a speed of 4.5 m. The temperature distribution in the aluminum foil was measured by thermography when conveyed at / min and heated by high frequency induction.

  The results of these experiments are shown in FIGS. FIG. 8A shows a measurement result of measuring the temperature distribution in the width direction of an aluminum foil heated by a high frequency induction heating apparatus provided with only one pair of magnetic bodies. FIG. 8B shows a magnetic body. FIG. 9A shows the result of photographing the temperature distribution of the aluminum foil heated by the high frequency induction heating device provided with only one pair. FIG. 9A shows the result of heating by the high frequency induction heating device provided with three pairs of magnetic bodies. The measurement result of measuring the temperature distribution in the width direction of the aluminum foil is shown, and FIG. 9B shows the result of photographing the temperature distribution of the aluminum foil heated by the high-frequency induction heating apparatus provided with three pairs of magnetic materials. It is shown.

  As shown in FIGS. 8 (a) and 8 (b), in the high frequency induction heating apparatus provided with only one pair of magnetic bodies, a low temperature portion generated near both ends of the aluminum foil as compared with the high frequency induction heating apparatus in which the magnetic bodies are not bonded. The temperature at increased.

  Further, as shown in FIGS. 9A and 9B, in the high frequency induction heating apparatus provided with three pairs of magnetic bodies, near both ends of the aluminum foil, compared with the high frequency induction heating apparatus provided with only one pair of magnetic bodies. The temperature in the low temperature portion generated in the above becomes higher, and the low temperature portion generated in the vicinity of both ends of the aluminum foil is closer to the temperature other than the low temperature portion.

Next, a second embodiment of the high-frequency induction heating device according to the present invention will be described with reference to FIG.

  In the following description, the same or equivalent configurations as those of the first embodiment of the high-frequency induction heating device according to the present invention described with reference to FIGS. 3 to 4 are the same as those used above. Detailed description of the configuration and operation will be omitted as appropriate by using reference numerals.

Here, FIG. 10 (a) shows a schematic configuration explanatory diagram of the high-frequency induction heating device according to the second embodiment of the present invention, and FIG. 10 (b) shows the configuration of FIG. 10 (a). Cross-sectional structure explanatory drawing by the DD line is shown.

  The high frequency induction heating device 50 shown in FIGS. 10A and 10B is a transverse type high frequency induction heating device, and is disposed opposite to each other with a predetermined gap through which the plate-like conductive material 12 passes. A pair of magnetic members, a U-shaped ferrite core 52 and a ferrite core 52, and a feeder (not shown) as a line that conducts a high-frequency current generated by a high-frequency oscillator (not shown). An induction coil 40 and an induction coil 42 that are fed with a high-frequency current from an oscillator are configured.

  The predetermined gap is determined by the thickness of the plate-like conductive material 12, the vertical position fluctuation of the plate-like conductive material 12, or the heating efficiency.

More specifically, the ferrite core 52 is formed by connecting a plurality of U-shaped magnetic materials 52a without gaps. Similarly, the ferrite core 54 is configured by a plurality of U-shaped magnetic materials 54a. The ferrite core 52 and the ferrite core 54 are configured such that the concave and convex surfaces having a U-shaped cross section are opposed to each other, and the longitudinal direction of the ferrite core 52 and the ferrite core 54 is plate-like. The conductive material 12 is arranged so as to be orthogonal to the conveying direction of the conductive material 12, that is, the longitudinal direction of the ferrite core 52 and the ferrite core 54 and the width direction of the plate-shaped conductive material 12 coincide with each other. It is conveyed in the gap formed by the ferrite core 52 and the ferrite core 54.

  The induction coil 40 is disposed so as to surround the connecting portion 52d that connects the convex portion 52b and the convex portion 52c of the ferrite core 52. Similarly, the induction coil 42 includes the convex portion 54b and the convex portion 54c of the ferrite core 54. Are arranged so as to surround a connecting portion 54d for connecting the two.

  Here, the ferrite core 52 is formed in the longitudinal direction in the case where the conventional high-frequency induction heating apparatus 10 is used, and a low temperature portion in the vicinity of both ends in the width direction of the plate-like conductive material 12 shown in FIG. The magnetic material 52a-1 and the magnetic material 52a-2 at a position corresponding to the technology low temperature part are arranged at a position protruding downward by a predetermined amount, and the ferrite core 54 is arranged in the longitudinal direction in the conventional direction. A magnetic material 54a-1 at a position corresponding to the low temperature part in the vicinity of both ends in the width direction of the plate-like conductive material 12 shown in FIG. 2 generated when the high frequency induction heating device 10 is used, that is, the position corresponding to the conventional low temperature part. And the magnetic material 54a-2 are arranged at positions projecting upward by a predetermined amount.

  That is, in the longitudinal direction of the ferrite core 52, the magnetic material 52a-1 at a position corresponding to the point P of the conventional low temperature part and the magnetic material 52a-2 at a position corresponding to the point Q of the conventional low temperature part are: It protrudes downward by a predetermined amount from the other magnetic material 52 a and is disposed close to the plate-like conductive material 12.

  On the other hand, in the longitudinal direction of the ferrite core 54, the magnetic material 54a-1 at a position corresponding to the point P of the conventional low temperature part and the magnetic material 54a-2 at a position corresponding to the point Q of the conventional low temperature part are: It protrudes upward by a predetermined amount from the other magnetic material 54a, and is disposed close to the plate-like conductive material 12.

In the above configuration, when a high-frequency current is supplied from the high-frequency oscillator to the induction coil 40 and the induction coil 42 of the transverse high-frequency induction heating device 50 via the feeder, the magnetic flux generated by the induction coil 40 and the induction coil 42 is a predetermined value. The plate-like conductive material 12 passing through the gap is penetrated, and thereby, an eddy current is induced in the plate-like conductive material 12 and the plate-like conductive material 12 is heated.

Here, eddy currents induced on the surface of the plate-like conductive material 12 by the transverse high-frequency induction heating device 50 will be described. For example, as shown in FIG. 11 (a), the eddy current is generated by the convex portion 52b and the convex portion 54b of the ferrite core 54 facing each other, and the convex portion 52c and the ferrite core of the ferrite core 52 facing each other. 54 circulates around the convex portion 54 c of the magnetic material 54 and concentrates in the vicinity of the regions of the magnetic material 52 a-1 and the magnetic material 54 a-1 facing each other and the magnetic material 52 a-2 and the magnetic material 54 a-2 facing each other. Is done.

  In FIG. 11A, the detailed illustration of the ferrite core 52 and the ferrite core 54 is omitted in order to simplify the illustration and facilitate understanding of the present invention.

That is, eddy currents induced on the surface of the plate-like conductive material 12 will be described with reference to FIG. 11B. The magnetic material 52a-1 constituting the ferrite core 52 and the magnetic material 54a constituting the ferrite core 54 are described. -1 and the gap g2 between the magnetic material 52a-2 constituting the ferrite core 52 and the magnetic material 54a-2 constituting the ferrite core 54 are other magnetic materials constituting the ferrite core 52. Since the plate-like conductive material 12 is closer than the gap g3 between the magnetic material 54a constituting the ferrite core 54 and the magnetic material 52a-1 and the magnetic material 52a-1, Eddy currents are concentrated in a region near the position of the material 54a-1 and a region near the positions of the magnetic material 52a-2 and the magnetic material 54a-2.

  Therefore, in the transverse type high frequency induction heating apparatus 50, the region in the vicinity of the magnetic material 52a-1 and the magnetic material 54a-1 and the vicinity of the magnetic material 52a-2 and the magnetic material 54a-2 in the plate-like conductive material 12 are used. By concentrating eddy currents in the region, the conventional conductive low-temperature portion of the plate-like conductive material 12 is efficiently heated, and no low-temperature portion is generated in the width direction of the plate-like conductive material 12, The temperature distribution of the plate-like conductive material 12 can be made uniform.

  That is, according to the transverse type high frequency induction heating device 50, the magnetic material 52 a-1 and the magnetic material 52 a-2 at the position corresponding to the conventional low temperature part of the plate-like conductive material 12 of the ferrite core 52 are the ferrite core 52. The magnetic material 54 a-1 and the magnetic material 54 a-2 located below the other magnetic material constituting the magnetic material 54 and corresponding to the low temperature part of the prior art of the conductive material 12 of the ferrite core 54 constitute the ferrite core 54. The eddy current induced on the surface of the plate-like conductive material 12 is positioned above the other magnetic material constituting the magnetic material 52a-1, the magnetic material 52a-2, the magnetic material 54a-1 and the magnetic material. The region where the magnetic material 52a-1, the magnetic material 52a-2, the magnetic material 54a-1 and the magnetic material 54a-2 are located in the plate-like conductive material 12, that is, is concentrated at the position of the material 54a-2. The prior art low temperature portion of the plate-like conductive material 12 is efficiently heated, and no low-temperature portion is generated in the width direction of the plate-like conductive material 12, and the temperature distribution of the plate-like conductive material 12 is uniform. It becomes.

The embodiment described above can be modified as shown in the following (1) to (11).

  (1) In the above-described embodiment, the magnetic body 32 and the magnetic body 34 paired with the magnetic body 32 are bonded to a position corresponding to the conventional low temperature part of the plate-like conductive material 12 in the ferrite core 14 and magnetic The magnetic body 38 that forms a pair with the magnetic body 36 and the magnetic body 36 is adhered to a position corresponding to the conventional low temperature part of the plate-like conductive material 12 in the ferrite core 16, but this is not restrictive. Of course. For example, the magnetic body 32 and the magnetic body 34 are integrated with the ferrite core 14, and the magnetic body 36 and the magnetic body 38 are integrated with the ferrite core 16, that is, the shape of the ferrite core is the conventional plate-like conductive material 12. You may make it set it as the shape which protruded in the rectangular parallelepiped shape in the position corresponding to a technical low temperature part.

  Specifically, for example, as in the transverse type high frequency induction heating device 60 shown in FIG. 12, the outer surface 62aa of the convex portion 62a of the ferrite core 62 is formed to project to form the bulging portion 65 and the bulging portion 66. Alternatively, the bulging portion 67 and the bulging portion 68 may be formed by projecting the outer surface 64aa of the convex portion 64a of the ferrite core 64.

  In short, the region corresponding to the conventional low temperature portion of the plate-like conductive material 12 in the ferrite core is formed to bulge out from the other regions, and the region corresponding to the conventional low temperature portion of the plate-like conductive material 12 in the ferrite core is formed. What is necessary is just to make it larger than another area | region.

  (2) In the above-described embodiment, the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38 that are bonded to the outer surface 14aa of the convex portion 14a of the ferrite core 14 and the outer surface 16aa of the convex portion 16a of the ferrite core 16. However, the shape of the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38 is not limited to this, and may be any appropriate shape such as a cubic shape or a cylindrical shape. Can be selected.

  (3) In the above-described embodiment, the magnetic body 32 and the magnetic body 34 are bonded to the outer surface 14aa of the convex portion 14a of the ferrite core 14 located on the outlet side in the conveying direction of the plate-like conductive material 12, and the ferrite core Although the magnetic body 36 and the magnetic body 38 are bonded to the outer surface 16aa of the 16 convex portions 16a, the present invention is not limited to this, and the convexity of the ferrite core 14 positioned on the entrance side in the transport direction is naturally limited. The magnetic body 32 and the magnetic body 34 may be bonded to the outer surface 14ba of the portion 14b, and the magnetic body 36 and the magnetic body 38 may be bonded to the outer surface 16ba of the convex portion 16b of the ferrite core 16.

  (4) In the embodiment described above, the magnetic body 32 and the magnetic body 34 paired with the magnetic body 32 are bonded to the outer surface 14aa of the convex portion 14a of the ferrite core 14, and the magnetic body 36 and the magnetic body 36 are paired with each other. The magnetic body 38 formed is adhered to the outer surface 16aa of the convex portion 16a of the ferrite core 16, but the magnetic body 32 is attached to the outer surface 14aa of the convex portion 14a of the ferrite core 14 and the outer surface 16aa of the convex portion 16a of the ferrite core 16. Even if the magnetic body 34, the magnetic body 36, and the magnetic body 38 are bonded, the temperature rise in the prior art low temperature portion of the plate-like conductive material 12 is insufficient, and the temperature distribution in the width direction of the plate-like conductive material 12 is uniform. If not, the inner surface 14ab of the convex portion 14a of the ferrite core 14, the inner surface 16ab of the convex portion 16a of the ferrite core 16, and the convex portion 14 of the ferrite core 14 are further provided. The outer surface 14ba of the ferrite core 16 and the outer surface 16ba of the convex portion 16b of the ferrite core 16 or the inner surface 14bb of the convex portion 14b of the ferrite core 14 and the inner surface 16bb of the convex portion 16b of the ferrite core 16 are in the same direction in the opposite direction. You may make it adhere | attach a pair of magnetic body in the position corresponding to the prior art low temperature part of the electroconductive material 12. FIG.

  Specifically, for example, a magnetic body 32 and a magnetic body that forms a pair with the magnetic body 32 on the outer surface 14aa of the convex portion 14a of the ferrite core 14 as in the transverse high-frequency induction heating apparatus 100 illustrated in FIG. 34 is bonded to the outer surface 16aa of the convex portion 16a of the ferrite core 16, and the magnetic body 38 and a magnetic body 38 paired with the magnetic body 36 are bonded to each other, and the magnetic body 43 and the magnetic material are bonded to the inner surface 14ab of the convex portion 14a of the ferrite core 14. The magnetic body 44 paired with the body 43 is bonded, the magnetic body 46 and the magnetic body 48 paired with the magnetic body 46 are bonded to the inner surface 16ab of the convex portion 16a of the ferrite core 16, and the convex portion 14b of the ferrite core 14 is formed. A magnetic body 72 and a magnetic body 74 paired with the magnetic body 72 are bonded to the outer surface 14ba, and the magnetic body 76 and the magnetic body are bonded to the outer surface 16ba of the convex portion 16b of the ferrite core 16. 6 is bonded to the inner surface 14bb of the convex portion 14b of the ferrite core 14, and the magnetic body 84 is bonded to the inner surface 14bb of the convex portion 14b of the ferrite core 14, and the inner surface of the convex portion 16b of the ferrite core 16 is bonded. You may make it adhere | attach the magnetic body 88 which makes a pair with the magnetic body 86 and the magnetic body 86 to 16bb.

  Further, in the transverse type high frequency induction heating apparatus 100, when the temperature increase in the prior art low temperature portion of the plate-like conductive material 12 is too large and the temperature distribution in the width direction of the plate-like conductive material 12 is not uniform, Like the transverse high-frequency induction heating apparatus 200 shown in FIG. 13B, the magnetic body 32 and the magnetic body 34 paired with the magnetic body 32 are bonded to the outer surface 14aa of the convex portion 14a of the ferrite core 14, and the ferrite The magnetic body 38 and the magnetic body 38 paired with the magnetic body 36 are bonded to the outer surface 16aa of the convex portion 16a of the core 16, and the magnetic body 72 and the magnetic body 72 are paired with the outer surface 14ba of the convex portion 14b of the ferrite core 14. The magnetic body 74 is bonded, and the magnetic body 76 and the magnetic body 78 paired with the magnetic body 76 are bonded to the outer surface 16ba of the convex portion 16b of the ferrite core 16. Good.

  As described above, by increasing or decreasing the number of magnetic bodies bonded to the ferrite core 14 and the ferrite core 16, it is possible to control the temperature rise in the conventional technology low temperature portion of the plate-like conductive material 12.

  That is, depending on the material and size of the plate-like conductive material and the magnetic material to be bonded, the side surface extending in the longitudinal direction of the ferrite core, that is, the adhesion position of the magnetic material on the outer surface and inner surface of the convex portion of the ferrite core, By changing the number of adhesions, it is possible to control the temperature rise of the plate-like conductive material 12 in the conventional low temperature portion.

  (5) In the above-described embodiment, the magnetic body 32 and the magnetic body 34 paired with the magnetic body 32 are bonded to the outer surface 14aa of the convex portion 14a of the ferrite core 14, and the magnetic body 36 and the magnetic material 36 are paired with each other. The magnetic body 38 is bonded to the outer surface 16aa of the convex portion 16a of the ferrite core 16. However, the present invention is not limited to this, and the magnetic body 32 and the magnetic body 34 are bonded to the ferrite core 14. Adhering to the opposing surface 14e of the convex portion 14a facing the convex portion 16a of the ferrite core 16, the magnetic body 36 and the magnetic body 38 are opposed to the convex portion 14a of the ferrite core 14 of the convex portion 16a of the ferrite core 16. You may make it adhere | attach.

  Specifically, for example, as in the transverse type high frequency induction heating apparatus 300 shown in FIG. 14A, the related art on the facing surface 14e of the convex portion 14a of the ferrite core 14 facing the convex portion 16a of the ferrite core 16 is provided. The magnetic body 32 is bonded to a position corresponding to the point P of the low temperature part, and the position corresponding to the point Q of the prior art low temperature part on the facing surface 14e of the convex part 14a of the ferrite core 14 facing the convex part 16a of the ferrite core 16 A magnetic body 34 that forms a pair with the magnetic body 32 is bonded to the magnetic body 32 at a position corresponding to the point P of the conventional low-temperature portion on the facing surface 16e of the convex portion 16a of the ferrite core 16 facing the convex portion 14a of the ferrite core 14. At the point Q of the prior art low temperature part on the facing surface 16e of the convex part 16a of the ferrite core 16 facing the convex part 14a of the ferrite core 14 The magnetic body 38 paired with the magnetic material 36 in response to the position may be adhered.

  Even if the magnetic body 32, the magnetic body 34, the magnetic body 36, and the magnetic body 38 are bonded to the facing surface 14 e of the ferrite core 14 and the facing surface 16 e of the ferrite core 16, the low temperature of the conventional conductive material 12 is low. In the case where the temperature distribution in the width direction of the plate-like conductive material 12 is not uniform due to insufficient temperature rise at the portion, the convex portion 14 b of the ferrite core 14 is opposed to the convex portion 16 b of the ferrite core 16. You may make it adhere | attach a magnetic body on the surface 16g which opposes the surface 16g and the convex part 14b of the ferrite core 14 of the convex part 16b of the ferrite core 16. FIG.

  Specifically, for example, like the transverse type high frequency induction heating apparatus 400 shown in FIG. 14B, in addition to the configuration of the transverse type high frequency induction heating apparatus 300, the ferrite core 16 of the convex portion 14b of the ferrite core 14 is provided. The magnetic body 80 is bonded to a position corresponding to the point P of the low temperature portion of the prior art on the facing surface 14g facing the convex portion 16b, and the facing surface facing the convex portion 16b of the ferrite core 16 of the convex portion 14b of the ferrite core 14 The magnetic body 82 that forms a pair with the magnetic material 80 is bonded to a position corresponding to the point Q of the conventional technology low temperature portion at 14 g, and the convex portion 16 b of the ferrite core 16 on the facing surface 16 g facing the convex portion 14 b of the ferrite core 14. The magnetic body 84 is bonded to the position corresponding to the point P of the low temperature portion of the prior art, and the convex portion 14 of the ferrite core 14 of the convex portion 16b of the ferrite core 16 is formed. It may be bonded to the magnetic material 86 which forms a pair with the magnetic material 84 at a position corresponding to the point Q of the prior art low-temperature portion in the opposing face 16g that faces the.

  (6) In the above-described embodiment, when forming a ferrite core by connecting U-shaped magnetic materials without gaps, a magnetic material at a position corresponding to the conventional low temperature portion of the plate-like conductive material 12 is used. Although it is configured so as to protrude upward or downward from other magnetic materials, it is of course not limited to this, and the position corresponding to the prior art low temperature part of the plate-like conductive material 12 As the magnetic material, a material having a convex portion longer than the convex portion of the other magnetic material may be used, and the ferrite core may be constituted by such a magnetic material.

  (7) In the above-described embodiment, when forming a ferrite core by connecting U-shaped magnetic materials without gaps, a magnetic material at a position corresponding to the conventional low temperature portion of the plate-like conductive material 12 is used. Although it is configured to be shifted upward or downward by one, it is of course not limited to this, and when the prior art low temperature part of the plate-like conductive material 12 is wide, the prior art low temperature part A plurality of magnetic materials may be shifted so as to correspond to the above.

  (8) In the high frequency induction heating device 30, the high frequency induction heating device 60, the high frequency induction heating device 100, the high frequency induction heating device 200, the high frequency induction heating device 300, and the high frequency induction heating device 400 in the above-described embodiment, Although the case where the cores 14 and 16 are configured by a single magnetic member having a U-shaped cross section has been illustrated and described, it is needless to say that the cores 14 and 16 are not limited thereto. The ferrite cores 14 and 16 may be configured by connecting a plurality of U-shaped magnetic materials without gaps. In this case, among the magnetic materials constituting the ferrite cores 14 and 16, the magnetic material 32, the magnetic material 34, the magnetic material 36, the magnetic material 38, the magnetic material corresponding to the position of the low temperature part of the prior art are included. 43, magnetic body 44, magnetic body 46, magnetic body 48, magnetic body 62, magnetic body 64, magnetic body 66, magnetic body 68, magnetic body 72, magnetic body 74, magnetic body 76, magnetic body 78, magnetic body 80, The magnetic body 82, the magnetic body 84, or the magnetic body 86 may be provided.

  (9) In each of the modifications described above, similarly to the modification described in (1) above, the magnetic body 43, the magnetic body 44, the magnetic body 46, the magnetic body 48, the magnetic body 62, the magnetic body 64, and the magnetic body. 66, the magnetic body 68, the magnetic body 72, the magnetic body 74, the magnetic body 76, the magnetic body 78, the magnetic body 80, the magnetic body 82, the magnetic body 84 or the magnetic body 86 are not bonded, but they are bonded to the ferrite core 14 or The shape may be integrated with the ferrite core 16, that is, the shape of the ferrite core may swell in a rectangular parallelepiped shape at a position corresponding to the conventional low temperature portion of the plate-like conductive material 12.

  (10) In the above-described embodiment and the modifications shown in (1) to (9) above, the ferrite core 14 and the ferrite core 16 are symmetric with respect to the plate-like conductive material 12. On the other hand, magnetic body 32, magnetic body 34, magnetic body 36, magnetic body 38, magnetic body 43, magnetic body 44, magnetic body 46, magnetic body 48, magnetic body 62, magnetic body 64, magnetic body 66, magnetic body 68, The magnetic body 72, the magnetic body 74, the magnetic body 76, the magnetic body 78, the magnetic body 80, the magnetic body 82, the magnetic body 84, or the magnetic body 86 are formed, but only one of the ferrite core 14 and the ferrite core 16 is formed. You may make it form.

  Similarly, among the magnetic materials constituting the ferrite core 52 and the ferrite core 54, only one of the ferrite core 52 and the ferrite core 54 at the position corresponding to the low temperature portion of the prior art faces each other. The ferrite core may be shifted so as to be closer to the plate-like conductive material 12 than other magnetic materials.

  (11) The above-described embodiment and the modifications shown in (1) to (10) may be combined as appropriate.

  The present invention can be used as a heating means in heat treatment such as annealing or surface treatment, or a drying means in a drying step after washing or painting.

FIG. 1A is a schematic perspective view illustrating a conventional high-frequency induction heating apparatus, and FIG. 1B is a cross-sectional configuration explanatory view taken along line AA in FIG. FIG. 2 is a graph showing the temperature distribution in the width direction of the plate-like conductive material when heated by the conventional high-frequency induction heating apparatus shown in FIGS. FIG. 3A is a schematic perspective view illustrating the high-frequency induction heating apparatus according to the first embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along line BB in FIG. FIG. FIG. 4 is a view taken in the direction of arrow C in FIG. FIG. 5A is an explanatory diagram conceptually showing a current path of eddy current induced on the surface of the plate-like conductive material by the high-frequency induction heating device shown in FIGS. 3A and 3B. (B) is end surface structure explanatory drawing by the BB line of the high frequency induction heating apparatus shown to Fig.3 (a) (b) (illustration of the induction coil is abbreviate | omitting). FIG. 6A is a configuration explanatory view showing the high-frequency induction heating device used in the experiment by the present inventor, and FIG. 6B is an EE line of the high-frequency induction heating device shown in FIG. FIG. Fig.7 (a) is a structure explanatory drawing which shows the high frequency induction heating apparatus used for experiment by this inventor, FIG.7 (b) is the FF line | wire of the high frequency induction heating apparatus shown to Fig.7 (a). FIG. FIGS. 8A and 8B show the results of experiments conducted using the high frequency induction heating apparatus shown in FIG. FIGS. 9A and 9B show the results of experiments conducted using the high frequency induction heating apparatus shown in FIG. FIG. 10A is a schematic configuration explanatory view showing a high-frequency induction heating apparatus according to the second embodiment of the present invention, and FIG. 10B is a cross-sectional configuration taken along line DD of FIG. 10A. It is explanatory drawing. FIG. 11A is an explanatory diagram conceptually showing a current path of eddy current induced on the surface of the plate-like conductive material by the high-frequency induction heating apparatus shown in FIGS. 10A and 10B. (B) is end face structure explanatory drawing of the ferrite core by the DD line of the high frequency induction heating apparatus shown to Fig.10 (a) (b). FIG. 12 is a schematic perspective view illustrating a modification of the high-frequency induction heating device according to the present invention. 13 (a) and 13 (b) are schematic configuration perspective views showing a modification of the high-frequency induction heating device according to the present invention. 14 (a) and 14 (b) are schematic configuration perspective views showing a modification of the high-frequency induction heating device according to the present invention.

Explanation of symbols

10, 30, 50, 60, 100, 200, 300, 400 High frequency induction heating device 12 Plate-shaped conductive material 14, 16, 52, 54 Ferrite cores 14a, 14b, 16a, 16b, 52b, 52c, 54b, 54c, 62a, 64a Convex part 14c, 16c, 52d, 54d Connecting part 18, 20, 22, 24, 40, 42 Inductive coil 32, 34, 36, 38, 43, 44, 46, 48, 62, 64, 66, 68 72, 74, 76, 78, 80, 82, 84, 86 Magnetic body 52a, 52a-1, 52a-2 54a, 54a-1, 54a-2 Magnetic material 65, 66, 67, 68 Projection

Claims (10)

In a high-frequency induction heating apparatus having a transverse structure that induction-heats a plate-like conductive material with a high-frequency current,
A plate-shaped conductive material having a U-shape configured to have a protruding portion protruding at both ends in the conveying direction orthogonal to the width direction of the plate-shaped conductive material and a connecting portion that connects the protruding portion; A first ferrite core having a length equal to the length in the width direction of the conductive material and disposed along the width direction of the plate-shaped conductive material, and having a first induction coil disposed at the connecting portion When,
A U-shape configured to include a convex portion protruding at both ends in the conveying direction orthogonal to the width direction of the plate-like conductive material and a connecting portion that connects the convex portion; and The plate-like conductive material has a length equal to the width-direction length of the plate-like conductive material and is arranged along the width direction of the plate-like conductive material. A second ferrite core disposed so that the convex portions at both ends face each other with a predetermined interval between which the plate-like conductive material can be conveyed between the ferrite core and the first ferrite core;
A high frequency induction characterized in that at least one pair of bulging portions is formed in the vicinity of both end faces in the width direction of at least one of the first ferrite core and the second ferrite core. Heating device. In a high-frequency induction heating apparatus having a transverse structure that induction-heats a plate-like conductive material with a high-frequency current,
A plate-shaped conductive material having a U-shape configured to have a protruding portion protruding at both ends in the conveying direction orthogonal to the width direction of the plate-shaped conductive material and a connecting portion that connects the protruding portion; A first ferrite core having a length equal to the length in the width direction of the conductive material and disposed along the width direction of the plate-shaped conductive material, and having a first induction coil disposed at the connecting portion When,
A U-shape configured to include a convex portion protruding at both ends in the conveying direction orthogonal to the width direction of the plate-like conductive material and a connecting portion that connects the convex portion; and The plate-like conductive material has a length equal to the width-direction length of the plate-like conductive material and is arranged along the width direction of the plate-like conductive material. A second ferrite core disposed so that the convex portions at both ends face each other with a predetermined interval between which the plate-like conductive material can be conveyed between the ferrite core and the first ferrite core;
A high-frequency induction heating apparatus, wherein at least one pair of bulging portions is formed in the vicinity of both end faces in the width direction for each of the first ferrite core and the second ferrite core. In the high frequency induction heating device according to claim 1,
The bulging portion is formed on the side surface extending in the longitudinal direction of at least one of the first ferrite core and the second ferrite core, and is formed of the plate-like conductive material conveyed within the predetermined interval. A high-frequency induction heating device characterized by being formed in the vicinity. In the high frequency induction heating device according to claim 1,
The bulging portion is formed on at least one facing surface of at least one of the projecting portions at both ends of the first ferrite core and the second ferrite core facing each other. A high-frequency induction heating device characterized by that. In the high frequency induction heating device according to claim 2,
The bulging portion is formed in the vicinity of the plate-like conductive material conveyed within the predetermined interval on a side surface extending in a longitudinal direction of the first ferrite core and the second ferrite core. High frequency induction heating device characterized by In the high frequency induction heating device according to claim 2,
The high-frequency induction heating device, wherein the bulging portion is formed on at least one of the opposing surfaces of the convex portions at both ends of the first ferrite core and the second ferrite core. In the high frequency induction heating device according to any one of claims 1, 2, 3, 4, 5 or 6,
The bulge portion is formed by adhering a magnetic material having a predetermined shape. In a high-frequency induction heating apparatus having a transverse structure that induction-heats a plate-like conductive material with a high-frequency current,
A U-shaped magnetic material is continuously provided without a gap, and has a protruding portion formed at both ends in the conveying direction orthogonal to the width direction of the plate-like conductive material and a connecting portion that connects the protruding portions. Forming a U-shape configured and having a length equal to the length in the width direction of the plate-like conductive material, arranged along the width direction of the plate-like conductive material, A first ferrite core provided with a first induction coil;
A U-shaped magnetic material is continuously provided without any gaps, and has a protruding portion formed at both ends in the conveying direction orthogonal to the width direction of the plate-like conductive material and a connecting portion that connects the protruding portions. A U-shape configured as described above, and having a length equal to the length in the width direction of the plate-like conductive material, arranged along the width direction of the plate-like conductive material, and the connecting portion A second induction coil is disposed on the first ferrite core, and the protrusions on both ends are opposed to each other with a predetermined gap between the first ferrite core and the plate-like conductive material. A second ferrite core disposed in the
With respect to at least one of the magnetic material constituting the first ferrite core and the magnetic material constituting the second ferrite core, at least one pair located in the vicinity of both end faces in the one width direction A high-frequency induction heating apparatus, wherein a magnetic material is disposed closer to the plate-like conductive material than other magnetic materials. In a high-frequency induction heating apparatus having a transverse structure that induction-heats a plate-like conductive material with a high-frequency current,
A U-shaped magnetic material is continuously provided without a gap, and has a protruding portion formed at both ends in the conveying direction orthogonal to the width direction of the plate-like conductive material and a connecting portion that connects the protruding portions. Forming a U-shape configured and having a length equal to the length in the width direction of the plate-like conductive material, arranged along the width direction of the plate-like conductive material, A first ferrite core provided with a first induction coil;
A U-shaped magnetic material is continuously provided without any gaps, and has a protruding portion formed at both ends in the conveying direction orthogonal to the width direction of the plate-like conductive material and a connecting portion that connects the protruding portions. A U-shape configured as described above, and having a length equal to the length in the width direction of the plate-like conductive material, arranged along the width direction of the plate-like conductive material, and the connecting portion A second induction coil is disposed on the first ferrite core, and the protrusions on both ends are opposed to each other with a predetermined gap between the first ferrite core and the plate-like conductive material. A second ferrite core disposed in the
With respect to each of the magnetic material constituting the first ferrite core and the magnetic material constituting the second ferrite core, at least one pair of magnetic materials located in the vicinity of both end faces is more than the other magnetic materials. A high-frequency induction heating device, wherein the high-frequency induction heating device is disposed close to the plate-like conductive material. In the high frequency induction heating apparatus according to any one of claims 8 and 9,
The magnetic material constituting the first ferrite core and the magnetic material constituting the second ferrite core have the same shape, and at least one pair of magnets located in the vicinity of the both end faces A high-frequency induction heating device characterized in that the material and the other magnetic material are shifted from each other.