JP2011146355A - Heating coil device for induction heating, and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating coil device that can be efficiently cooled, has a good assembling workability, is low-cost, never causes a layer short, and can be efficiently manufactured, and also to provide a method of manufacturing the same. <P>SOLUTION: In a coil stand 5, spiral concave portions 1 to insert and place conductors each including a conductive twisted wire for forming a high-frequency coil is formed on the surface of an outer peripheral edge, a ferrite mounting portion 8, and a reinforcing support portion 4, and a fan-like gap 3 is formed between the ferrite mounting portion and the reinforcing support portion. The method for manufacturing includes a step wherein the coil stand is united with a placement and movement stand wherein a concave portion is formed on a top face thereof and which is rotatably supported to form the spiral concave portion, a guide pin and a pressurization roller unit in contact with one surface of the coil stand are prepared, and the coil stand and placement and movement stand is rotated so that the guide pin may move sliding in the spiral concave portion, to support the conductor, and then the conductor is gradually inserted and placed in the spiral concave portion while being pressed by the pressurization roller unit. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an induction heating apparatus used in general households, restaurants, and the like, and more particularly to an induction heating heating coil apparatus and a manufacturing method thereof.

  A conventional heating coil will be described with reference to FIGS.

  As shown in Japanese Utility Model Laid-Open No. 56-166694 and FIGS. 11 and 12, the coil base 20 is composed of a composite magnetic material of heat-resistant resin and magnetic powder, and a spiral recess 22 is formed on the coil base. The high frequency coil 21 was inserted and wound.

  Also, as shown in Japanese Patent Application Laid-Open No. 61-161687 and FIG. 13, after preparing a roller body 24 that comes into contact with one surface of the coil base 23 and inserting the starting end of the coil body, the coil base The roller body 24 supports and presses the conductor, and the method is used in which pressure is inserted into a groove formed on the entire surface of the coil base.

  In any case, since the cooling effect of the conductor is poor, as shown in Japanese Patent Application Laid-Open No. 61-71581 and FIG. 14, a resin coil base 27 provided with a plurality of space portions S in the thickness direction. A means for directly mounting and fixing a plane spiral enamel wire 28 forming a coil on the upper surface of the wire is used.

  Japanese Utility Model Publication No. 56-166694   JP-A 61-161687   JP-A 61-71581

  In the conventional heating coil, as shown in FIGS. 11 and 12, a coil base 20 having a spiral recess 22 spreads uniformly on the bottom of the spiral conductor 21, and the cooling air of the blower by forced air cooling or the like is generated by the spiral conductor. The structure was hard to hit 21 and could not be efficiently cooled. In addition, since the material of the coil base 20 is a composite magnetic body of a heat-resistant resin and magnetic powder, the manufacturing cost is high.

  Further, for this improvement, a coil base is formed of resin as shown in FIG. 14, and a planar spiral enamel wire 28 for forming a coil is directly placed on the base, and the bar or plate is formed radially. When the resin covering the ferrite has the same thickness and the resin coil base 27 is manufactured by mold molding, the flow of the resin in the mold is changed from the center of the mold to the outer periphery or vice versa. There is a method of manufacturing a coil base that flows in one direction, but the enameled wire and the adjacent enameled wire are in direct contact with each other. Since the enameled wire 28 is applied directly to the coil base 27 with an insulating fixing agent or the like and directly mounted, the assembly work is complicated and expensive, and the coil body is positioned on the coil base and a uniform layer of the fixing agent is formed. It is difficult.

  For this purpose, a roller body 24 that abuts on one surface of the coil base 23 as shown in FIG. 13 is prepared, and after inserting the starting end of the coil body, the coil base 23 is rotated and the roller body 24 rotates the conductor. A method is used in which a pressure is inserted into a groove formed on the entire surface of the coil base in order while supporting and pressing the roller 25. However, a load is applied to the groove for forced attachment, and an insulation failure is likely to occur. It is difficult to adjust the mutual rotation mechanism of the mounting base 26 mounted on the coil base 23. In particular, in the case of a coil base having a shape that allows intermittent ventilation, a conductor is formed in a spiral shape in the intermittent portion. It ’s difficult.

  First, the coil base material is configured as a heat-resistant and high-strength resin, and a spiral concave portion into which a conductor made of a conductive base wire forming a high-frequency coil is inserted, on the outer peripheral edge surface of the coil base, A plurality of ferrite storage bodies that house the ferrite sintered body, and a plurality of ferrite storage bodies that are not provided respectively on the plurality of device surfaces that house the ferrite sintered body and at least the reinforcing support surface formed between the device surfaces. Fan-shaped gaps are provided between the devices and between the adjacent devices and one reinforcing support portion to form a coil base.

  Secondly, it has a conductor made of a conductive stranded wire forming a high-frequency coil, and a plurality of fan-shaped through gaps formed radially from the central peripheral edge toward the outer peripheral edge, and on the top plate side. Insulating coil base having a first winding recess on the outer peripheral edge on the upper surface facing and a second winding recess on the center peripheral edge having a through hole, and a fan-like projection surface that fits into and enters the through gap And a step of forming a spiral recess by combining the fan-like projection surface with a rotatably mounted mounting table provided with a third winding recess on the upper surface, and a guide abutting against one surface of the coil base A step of inserting the conductor into the hole for inserting the conductor into at least one of the first and second end portions of the first and second wound recesses, and a coil base; In the mounting table, the guide pin has a spiral recess. The step of inserting the coil into the spiral recess while sequentially pressing the conductor by pressing the conductor by the pressure roller unit; An induction heating heating coil device manufacturing method comprising at least a step of inserting a terminal end of a conductor and a step of merging and separating the mounting moving table from the insulating coil table.

  According to the first aspect of the present invention, there is provided a fan-shaped through gap that exposes a part of the coil that is inserted and formed in the spiral recess. It is possible to cool efficiently.

  According to the invention of claim 2, by making the coil base material heat-resistant and high-strength resin, it is possible to ensure sufficient heat resistance and to withstand the roll and the pressing base, and the concave portion is broken by the guide pin and can be prevented from being caught. did.

  According to the invention of claim 3, the reinforcing support portion fixes a part of the exposed spiral conductor and ensures the strength of the coil base.

  According to the invention of claim 4, by preventing the adjacent short conductors between the adjacent conductors by insulating the adjacent conductors by the convex protrusions of the spiral concave portions provided between the adjacent conductors. Is possible.

  According to the fifth and sixth aspects of the invention, by providing the groove for leading out the terminal, it is possible to easily fix the coated conductors at the start end and the end end.

  According to the invention of claim 7, positioning of the coil on the coil base is facilitated without removing the conductor from the inside of the spiral concave portion, and the coil base can be fixed to the coil base during the formation of the coil portion, and can be efficiently guided. It was possible to manufacture a heating coil device for heating.

Hereinafter, the Example and manufacturing method of this invention are described using FIGS.
The present invention uses a coil base 5 made of an electrically insulating material having the spiral recess 1 of FIGS.

  The spiral concave portion 1 is provided on the surface of the outer peripheral edge on the upper surface facing the top plate side and radially from the central edge portion having the through hole 2 toward the outer peripheral edge portion in FIG. 7 is provided on the surface of the plurality of ferrite device portions 8 shown in FIGS.

  Further, the fan-shaped through gap 3 shown in FIGS. 1 and 3 is provided between the ferrite device portions 8 so that a part of the spiral conductor inserted and formed in the spiral recess 1 is exposed. The reinforcing support portion 4 shown in FIGS. 1 and 3 is integrally provided between the through gap portions 3 along the ferrite device portion 8, and a part of the spiral recess 1 is formed on the surface. .

  In the case of the present embodiment, glass fiber + thermoplastic resin is used as the electrical insulating material constituting the coil base.

  Further, the back surface of the reinforcing support 4 has a hole 2 for inserting the conductor in at least one of the start end and the end end of the spiral recess 1 and leads out the terminal connected to the hole in FIGS. The groove 6 has a substantially U-shaped cross section in this example.

  Next, the manufacturing method of the coil according to the present invention will be described with reference to FIGS. 5 to 9. The coil-like projection surface 9 shown in FIGS. After combining with the mounting table 10 that rotatably supports the winding recess provided on the upper surface to form a continuous spiral recess 11 as shown in FIG. 7, the start ends of the first and second winding recesses And the step of inserting the leading end of the conductor into the hole 2 for inserting the conductor into at least one of the terminal ends, and the guide pin 12 of FIGS. 8 and 9 moves along the flat spiral recess. 10 is rotated to support the conductor 13, and while pressing the conductor with the pressure roller section 14, the coil can be formed by sequentially inserting into the spiral recess 1 and winding in a plane spiral shape. .

  In the present embodiment, a 21-turn coil is generated using 39 litz wires of φ0.31, and a ferrite sintered body 7 is fitted on the back side of the coil base as shown in FIG.

  FIG. 10 shows a completed form of the coil of the present invention created in the above process.

Example of the present invention, coil table top view Example of the present invention, A section enlarged sectional view of FIG. Example of the present invention, bottom view of coil stand Example of the present invention, B section enlarged sectional view of FIG. Example of the present invention, coil table mounting table top view Example of the present invention, coil table mounting table front view Example of the present invention, coil table mounting moving table and coil table fitting top view Example of the present invention, front view of a jig when making a coil Example of the present invention, top view of a jig when making a coil Example of the present invention, coil top view Top view of heating coil of Patent Document 1 Front view of heating coil of Patent Document 1 Front view of heating coil manufacturing method of Patent Document 2 Heating coil bottom view of Patent Document 3

DESCRIPTION OF SYMBOLS 1 Spiral recessed part 2 Through-hole 3 Fan-shaped through-hole part 4 Reinforcing support part 5 Coil base 6 Terminal lead-out groove 7 Ferrite sintered body 8 Ferrite apparatus part 9 Fan-like projection surface 10 Mounted moving base 11 Continuous spiral-shaped recessed part 12 Guide pin 13 Conductor 14 Pressure roller section

Claims (7)

  A continuous spiral recess into which a conductor made of a conductive stranded wire forming a high-frequency coil is inserted is formed on the surface of the outer peripheral edge on the upper surface facing the top plate side and from the central edge having a through hole. It is provided at least on the surface of a plurality of ferrite device parts containing a ferrite sintered body radially provided toward the outer peripheral edge part, and inserted between the ferrite device parts in the spiral recess. A heating coil device for induction heating, wherein a circular coil base provided with a fan-shaped through gap portion from which a part of the spiral conductor is exposed is integrally formed of the same electrical insulating material.   The heating coil device for induction heating according to claim 1, wherein the electrically insulating material is a heat-resistant and high-strength resin.   2. A reinforcing support portion is integrally provided along the ferrite device portion between the fan-shaped through gap portions, and a part of the spiral concave portion is formed on a surface thereof. And the heating coil apparatus for induction heating of Claim 2.   4. The induction heating heating coil according to claim 1, wherein each adjacent conductor of the spiral conductor is contact-insulated by a convex protrusion of the spiral recess. apparatus.   A back surface of the reinforcing support portion has a hole for inserting the conductor in at least one of a start end portion and a terminal end portion of the spiral recess, and a groove for leading a terminal connected to the hole is provided. The heating coil device for induction heating according to claim 4, wherein the heating coil device is for induction heating.   The heating coil device for induction heating according to claim 5, wherein the groove for leading out the terminal is a U-shaped groove or an L-shaped groove having a hook portion. A conductor having a conductive stranded wire forming a high-frequency coil, and a plurality of fan-shaped through gaps formed radially from the central peripheral edge to the outer peripheral edge, and on the upper surface facing the top plate side An insulating coil base having a first winding recess at the outer peripheral edge and a second winding recess at the central peripheral edge having a through hole, and a fan-shaped protrusion surface that fits into and enters the through-air gap, A step of forming a spiral recess by combining with a mounting support table rotatably supported by a third winding recess on the surface, and a guide pin and a pressure roller contacting one surface of the coil mount A step of inserting the conductor into the hole into which the conductor is inserted into at least one of the first and second end portions of the first and second wound recesses, and the mounting table on which the coil table is mounted. The guide pin is rolled into the spiral recess. A step of supporting the conductor by rotating it so as to move, and sequentially inserting it into the spiral recess while pressing the conductor by the pressure roller, and terminating the conductor at the other end of the hole into which the start end is inserted. A method of manufacturing a heating coil device for induction heating, comprising at least a step of inserting and mounting and separating the mounting moving table from the insulating coil table.

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