Electromagnetic induction heating device

Abstract

Provided is an electromagnetic induction heating device that more efficiently transfers heat to an object to be heated. [Solution] An electromagnetic induction heating device 10 that is held by an operator and used to heat an object comprises an induction heating coil 44 that generates a magnetic field in which eddy currents are induced when an alternating current is passed through it, a current supply circuit 65 that supplies alternating current to the induction heating coil, a battery 81 that supplies power to the current supply circuit, a coil head 23 that stores the induction heating coil, a metal plate 51 that is provided separately from the coil head so as to be in close proximity to the induction heating coil, and is heated when eddy currents flow through it when the induction heating coil generates a magnetic field, and a fixing device 52 that fixes the metal plate to the coil head while maintaining a gap between the coil head and the metal plate, and the operator heats the object by pressing the metal plate against it.

Description

[Technical field]

[0001] The present invention relates to an electromagnetic induction heating device, and more particularly to an electromagnetic induction heating device that is handheld by an operator and used to heat an object. [Background technology]

[0002] For example, when constructing a house or the like, the portable bonding device described in Patent Document 1 can be used to attach a decorative material to a wall material or the like to perform an interior finishing.

[0003] Some heaters also have built-in batteries to make them easy to carry and handle during work, and allow multiple IH (Induction Heating) coils to be easily used depending on the application and the object to be heated (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-143825 [Patent Document 2] International Publication No. WO2022 / 107319 Brochure Summary of the Invention [Problem to be solved by the invention]

[0005] However, in devices with built-in batteries, the continuous usage time is determined by the battery's storage capacity. In addition, the shape of the object to be heated is not limited to a flat plate, and the shape may vary depending on the part of the object. Even if the coil head with the built-in IH coil can be replaced, the shape may be different and heat may not be transferred sufficiently. From this point of view, it is preferable to be able to heat more efficiently.

[0006] The present invention has been made in view of the above circumstances, and aims to make it possible to more efficiently transfer heat to an object to be heated. [Means for solving the problem]

[0007] An electromagnetic induction heating device according to one aspect of the present invention is an electromagnetic induction heating device that is held by an operator and used to heat an object, and comprises an induction heating coil that generates a magnetic field in which eddy currents are induced when an alternating current is passed through it, a current supply circuit that supplies alternating current to the induction heating coil, a battery that supplies power to the current supply circuit, a coil head that stores the induction heating coil, a metal plate that is provided separately from the coil head so as to be in close proximity to the induction heating coil, and through which eddy currents flow and are heated when the induction heating coil generates a magnetic field, and a fixing device that fixes the metal plate to the coil head while maintaining a gap between the coil head and the metal plate, and the operator heats the object by pressing the metal plate against it.

[0008] The fastener may be a bolt.

[0009] The fixture may be configured to adjust the distance between the coil head and the metal plate, which is the length of the gap between the coil head and the metal plate.

[0010] The metal plate may be made of iron, aluminum or copper or an alloy of iron, aluminum or copper, and may have a thickness of 150 μm to 3 mm.

[0011] The metal plate may be a metal mesh.

[0012] The metal plate may be a punched metal.

[0013] At least one of the faces of the metal plate can be embossed.

[0014] The metal plate can be deformable by manipulation by an operator.

[0015] The coil head can be configured to be detachable from the main body housing the current supply circuit. Effect of the Invention

[0016] As described above, according to the present invention, heat can be transferred more efficiently to the object to be heated. [Brief description of the drawings]

[0017] [Figure 1] 1 is a diagram showing an example of the appearance of an electromagnetic induction heating device 10 according to an embodiment of the present invention. [Diagram 2] 2A to 2C are diagrams illustrating attachment and detachment of the coil head 23 to the main body 21. [Diagram 3] 1 is a diagram illustrating an example of the internal configuration of an electromagnetic induction heating device 10. FIG. [Figure 4] 4 is a diagram illustrating another example of the internal configuration of the electromagnetic induction heating device 10. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The embodiment of the present invention will be described below, and the correspondence between the constituent elements of the present invention and the embodiment described in the detailed description of the invention will be exemplified as follows. This description is for confirming that the embodiment supporting the present invention is described in the detailed description of the invention. Therefore, even if there is an embodiment that is described in the detailed description of the invention but is not described here as an embodiment corresponding to the constituent elements of the present invention, this does not mean that the embodiment does not correspond to the constituent elements. Conversely, even if an embodiment is described here as corresponding to a constituent element, this does not mean that the embodiment does not correspond to constituent elements other than the constituent element.

[0019] An electromagnetic induction heating device according to one aspect of the present invention (e.g., electromagnetic induction heating device 10 in FIG. 3) is an electromagnetic induction heating device that is handheld by an operator and used to heat an object, and includes an induction heating coil (e.g., IH coil 44 in FIG. 3) that generates a magnetic field in which eddy currents are induced by passing an alternating current through it, a current supply circuit (e.g., high-frequency generating circuit 65 in FIG. 3) that supplies the alternating current to the induction heating coil, a battery (e.g., battery 81 in FIG. 3) that supplies power to the current supply circuit, and a coil head (e.g., 3), a metal plate (e.g., metal plate 51 in FIG. 3) that is provided separately from the coil head so as to be in close proximity to the induction heating coil and through which eddy currents flow and are heated when the induction heating coil generates the magnetic field, and a fastener (e.g., bolt 52 in FIG. 3) that fastens the metal plate to the coil head while maintaining a gap (e.g., gap 53 in FIG. 3) between the coil head and the metal plate, and the worker presses the metal plate against the object to heat the object.

[0020] An electromagnetic induction heating device according to one embodiment of the present invention will now be described with reference to Figs.

[0021] FIG. 1 is a diagram showing an example of the appearance of an electromagnetic induction heating device 10 according to an embodiment of the present invention. The electromagnetic induction heating device 10 is held by an operator and heats an object. For example, the electromagnetic induction heating device 10 can be used for bonding, peeling, deformation, etc., by heating a laminated panel, such as a decorative panel or a cosmetic panel, which is used as various building materials such as furniture, fittings, partitions, ceilings, and floors. The object to be heated is not limited to a building material, and may be any object that is subject to assembly, disassembly, deformation processing, etc. For example, the electromagnetic induction heating device 10 can be used for various processing such as bonding, peeling, and deformation by heating various objects such as building materials such as sashes, various parts such as automobile interiors, and electronic devices such as personal computers and smartphones.

[0022] The electromagnetic induction heating device 10 includes a main body 21, a handle 22, a coil head 23, a heat sink 24, and a battery box 25. The main body 21 houses a high-frequency generating circuit 65 and a battery 81, which will be described later, and the coil head 23 is attached to the main body 21. For example, the main body 21 is made of resin. The main body 21 is provided with a heat sink 24, and is formed with the handle 22 and the battery box 25. The handle 22 is a part that is held by the operator. The handle 22 is formed in a rod shape that is easy to grip in the operator's hand. For example, the handle 22 is formed in a square prism shape. The heat sink 24 is provided on one end of the handle 22, and the coil head 23 is attached to the main body 21. The battery box 25 is formed on the other end of the handle 22, among the parts of the main body 21.

[0023] Coil head 23 houses IH coil 44 (described later) and is configured to be detachable from main body 21. For example, coil head 23 is formed from heat-resistant resin. Heat sink 24 dissipates heat generated inside main body 21. For example, heat sink 24 dissipates heat generated in high-frequency generating circuit 65 (described later). Battery box 25 houses battery 81 (described later).

[0024] For example, the main body 21 is integrally formed with an insertion receiving portion 62 (described later) to which the coil head 23 is attached, the handle 22, and the battery box 25. The coil head 23 is formed separately from the main body 21.

[0025] 2 is a diagram illustrating the attachment and detachment of the coil head 23 to and from the main body 21. Although details will be described later, the coil head 23 is attached and fixed to the main body 21 by inserting the coil head 23 into the main body 21, and the coil head 23 is removed from the main body 21 by pulling the coil head 23 from the main body 21.

[0026] FIG. 3 is a diagram for explaining an example of the internal configuration of the electromagnetic induction heating device 10. The coil head 23 is configured to include a coil storage section 41, an insertion section 42, a plug 43, an IH coil 44, and a resonant circuit 45. The coil storage section 41 is formed on one end side of the ends of the coil head 23. The coil storage section 41 is formed on the end side of the coil head 23, and stores the IH coil 44 and the resonant circuit 45. The insertion section 42 is formed on the other end side of the ends of the coil head 23. The insertion section 42 is formed in a prism shape with a predetermined cross-sectional shape, and when the insertion section 42 is inserted into the main body 21, the coil head 23 is attached and fixed to the main body 21. For example, the cross section of the insertion section 42 is shaped as a wide rectangle and a narrow rectangle overlapping each other.

[0027] When the insertion portion 42 is inserted into the main body 21, the plug 43 is electrically connected to a socket 63 (described later) of the main body 21. That is, when the insertion portion 42 is inserted into the main body 21, the plug 43 is electrically connected to the socket 63 (described later) of the main body 21, and therefore the coil head 23 and the main body 21 are electrically connected.

[0028] The IH coil 44 is an example of an induction heating coil, and generates a magnetic field in which an eddy current is induced by passing an alternating current through it. For example, the IH coil 44 is a flat spiral coil. The IH coil 44 is disposed so that the magnetic field generated by passing an alternating current through it intersects with a metal plate 51, which will be described later. That is, the IH coil 44 is disposed inside the surface of the coil storage section 41 of the coil head 23 on the side where the metal plate 51 is disposed, and is disposed adjacent to the surface.

[0029] Resonant circuit 45 is made up of a capacitor and adjusts the high-frequency current supplied from high-frequency generating circuit 65 (described later) to match the power consumption of IH coil 44. For example, resonant circuit 45 forms a series resonant circuit together with IH coil 44 and improves the power factor of the power supplied from high-frequency generating circuit 65 to IH coil 44. For example, resonant circuit 45 passes a current with a delayed phase to IH coil 44 relative to the high-frequency voltage applied from high-frequency generating circuit 65.

[0030] A metal plate 51 is provided at one end of the coil storage section 41 that faces the insertion section 42. That is, the metal plate 51 is disposed close to the IH coil 44 so as to intersect with the magnetic field generated by the IH coil 44 stored in the coil storage section 41. The metal plate 51 is provided separately from the coil storage section 41. That is, the metal plate 51 is provided separately from the coil head 23. When the IH coil 44 generates a magnetic field, an eddy current flows in the metal plate 51, which generates Joule heat and heats it up.

[0031] When the metal plate 51 is heated by the magnetic field of the IH coil 44, an operator presses the metal plate 51 against an object, whereby the object is heated. In this case, of the surfaces of the metal plate 51, the surface facing the surface on the IH coil 44 side (i.e., the surface on the end side of the electromagnetic induction heating device 10) is pressed against the object. Since the metal plate 51 is pressed directly against the object, heat can be transferred more efficiently to the object to be heated.

[0032] The metal plate 51 is made of iron, aluminum, copper, or an alloy of iron, aluminum, or copper. For example, the metal plate 51 is made of stainless steel, which is a type of iron alloy. The thickness of the metal plate 51 is 150 μm to 3 mm.

[0033] Also, for example, the metal plate 51 is made of a metal mesh. The metal mesh is formed in a net or cloth shape from metal. The metal plate 51 can be formed from meshes of various metals. For example, the metal plate 51 is formed by weaving thin, linear metal wires like cloth. Also, for example, the metal plate 51 is formed from a welded wire mesh in which steel wires such as stainless steel are arranged lengthwise and widthwise and their intersections are electrically resistance welded. Also, for example, the metal plate 51 is formed in a wire mesh shape in which metal wires are alternately twisted together to form a hexagonal or other mesh. By forming the metal plate 51 as a metal mesh, when the metal plate 51 is pressed against an object, the metal plate 51 can be more easily deformed to fit the shape of the object, and heat can be more efficiently transferred to the object.

[0034] Moreover, for example, the metal plate 51 is made of a punched metal. The punched metal is a metal plate in which various holes such as round holes, square holes, and long holes are formed by a punching press. The punched metal is also called a porous plate, a screen, a punched wire mesh, or a perforated metal. By using the punched metal as the metal plate 51, when pressed against an object, the metal plate 51 deforms to fit the shape of the object, and heat can be transferred to the object more efficiently.

[0035] For example, metal plate 51 is made of expanded metal. Expanded metal is a metal plate that has diamond-shaped or tortoise-shell-shaped holes formed by stretching it while making cuts in it. By making metal plate 51 an expanded metal, when it is pressed against an object, metal plate 51 deforms to fit the shape of the object, and heat can be transferred to the object more efficiently.

[0036] Furthermore, for example, at least one of the surfaces of the metal plate 51 is embossed. Embossing refers to processing that creates a three-dimensional raised pattern. For example, at least one of the surfaces of the metal plate 51 is embossed to create unevenness in the shape of a circle, triangle, hemisphere, etc. The embossing can be a press process or a plastic process that presses with a roller. For example, if the surface of the metal plate 51 facing the surface on the IH coil 44 side is embossed, the area pressed against the object increases if the object has a soft surface, so that heat can be transferred more efficiently. For example, if the surface of the metal plate 51 facing the IH coil 44 side is embossed, the area exposed to air increases, so that unnecessary temperature rise of the metal plate 51 can be suppressed.

[0037] Moreover, the metal plate 51 is deformable by the operation of an operator. For example, the metal plate 51 is deformed by the operation of an operator to correspond to the shape of an object. When the metal plate 51 is made of aluminum, copper, an aluminum alloy, or a copper alloy, when it is formed thinner, or when it is made of a metal mesh or a punched metal, an operator can deform the metal plate 51 by hand or using a hand tool. For example, when the metal plate 51 is deformed to match the shape of an object, heat can be transferred to the object more efficiently. For example, when the metal plate 51 is deformed so that the central part of the metal plate 51 is convex to match the shape of a part of the object to be heated, and the metal plate 51 is pressed against the object, only a desired part of the object can be heated. For example, when the metal plate 51 is fixed through the bolt 52, the hole through which the bolt 52 is passed, which is provided in the metal plate 51, is made into a long hole, so that the metal plate 51 can be deformed more easily.

[0038] The bolts 52 are an example of a fastener, and fasten the metal plate 51 to the coil storage section 41 while maintaining the gap 53 between the coil storage section 41 and the metal plate 51. Four or six bolts 52 are provided. For example, when four bolts 52 are provided, the bolts 52 fasten the four corners of the metal plate 51 to the coil storage section 41. That is, the bolts 52 are an example of a fastener, and fasten the metal plate 51 to the coil head 23 while maintaining the gap 53 between the coil head 23 and the metal plate 51. The bolts 52 can be made of metal or resin.

[0039] The bolt 52 is screwed into a nut (not shown) provided at a corresponding position of the coil storage section 41, thereby fixing the metal plate 51 to the coil head 23 (coil storage section 41). By rotating the bolt 52 and adjusting the length of the screwing into the nut of the coil storage section 41, the distance between the coil head 23 (coil storage section 41) and the metal plate 51, which is the length of the gap 53 between the coil head 23 (coil storage section 41) and the metal plate 51, can be adjusted. The distance between the coil head 23 (coil storage section 41) and the metal plate 51, which is the length of the gap 53 between the coil head 23 (coil storage section 41) and the metal plate 51, can be adjusted in the range of 5 mm to 30 mm. The bolt 52 is detachable, so that the metal plate 51 can be replaced. The metal plate 51 can be attached to and detached from the coil head 23. The electromagnetic induction heating device 10 can be used in a state where the metal plate 51 is removed. The configuration (material, thickness, shape, etc.) of the metal plate 51 mounted on the electromagnetic induction heating device 10 is selected according to various conditions such as the purpose of the work, such as peeling, dismantling, or separation, or the material of the object to be peeled, dismantled, or separated and heated. By providing a blower fan (not shown) to blow air between the coil head 23 (coil storage section 41) and the metal plate 51, the coil head 23 (coil storage section 41) and the metal plate 51 can be cooled by air cooling.

[0040] When the gap 53 between the coil head 23 (coil storage section 41) and the metal plate 51 is maintained, the surface of the coil storage section 41 of the coil head 23 on which the IH coil 44 is disposed on the inside is exposed to air, making it easier to cool the IH coil 44 and suppressing unnecessary temperature rises in the IH coil 44. This makes it possible to suppress unnecessary temperature rises in the IH coil 44 and to heat the metal plate 51 more efficiently.

[0041] By screwing or loosening bolts 52 into nuts (not shown), the distance between coil head 23 (coil storage section 41) and metal plate 51, which is the length of gap 53 between coil head 23 (coil storage section 41) and metal plate 51, can be adjusted, thereby adjusting the amount of magnetic field generated by IH coil 44 that intersects with metal plate 51. This makes it possible to adjust the amount of heat generated in metal plate 51. In addition, by adjusting the distance between coil head 23 (coil storage section 41) and metal plate 51, which is the length of gap 53 between coil head 23 (coil storage section 41) and metal plate 51, the range (area) of metal plate 51 that is heated can be adjusted.

[0042] It should be noted that a pin, a rivet, or a clip can be used as a fastener instead of the bolt 52. Furthermore, in order to adjust the distance between the coil head 23 and the metal plate 51, a cylinder, a rack and pinion mechanism, a ball screw, or a telescopic mechanism can be used as a fastener instead of the bolt 52. The pin, rivet, clip, cylinder, rack and pinion mechanism, ball screw, or telescopic mechanism as a fastener can be made of metal or resin.

[0043] The main body 21 is provided with an energization switch 61, a plug receptacle 62, a socket 63, a power switch 64, a high frequency generating circuit 65, a microcomputer 66, and a tag reader / writer 67. When the energization switch 61 is pressed while the power switch 64 is conductive, the high frequency generating circuit 65, the microcomputer 66, and the tag reader / writer 67 are operated, the high frequency generating circuit 65 generates a high frequency voltage and current, and a current that generates a magnetic field flows in the IH coil 44. In other words, when the energization switch 61 is pressed while the power switch 64 is conductive, the metal plate 51 is heated.

[0044] The plug-in receiving portion 62 is formed in a groove shape with a cross section corresponding to the cross section of the plug-in portion 42, and when the plug-in portion 42 is inserted, it grips the plug-in portion 42 and fixes the coil head 23. For example, when the cross section of the plug-in portion 42 is a shape in which a wide rectangle and a narrow rectangle are overlapped, the cross section of the plug-in receiving portion 62 is also a shape corresponding to the cross section of the plug-in portion 42, that is, a shape in which a wide rectangle and a narrow rectangle are overlapped, and the plug-in receiving portion 62 fixes the coil head 23 so that the plug-in portion 42 can be moved only in one axial direction, that is, to insert the plug-in portion 42 into the plug-in receiving portion 62 or to remove the plug-in portion 42 from the plug-in receiving portion 62. When the plug-in portion 42 is inserted into the plug-in receiving portion 62, the plug 43 is inserted into the socket 63, and the plug 43 and the socket 63 are electrically connected, and thus the main body 21 and the coil head 23 are electrically connected. The plug-in receiving portion 62 is disposed in the main body 21 so as to face the heat sink 24. In this manner, the coil head 23 is configured to be detachable from the main body 21 housing the high frequency generating circuit 65. This makes the coil head 23 replaceable. For example, it is possible to replace the coil head 23 with a coil head 23 having a different capacity or shape of the IH coil 44 or a coil head 23 having a different shape of the coil storage portion 41. By replacing the coil head 23 with one suitable for heating an object, it becomes possible to more efficiently transfer heat to the object to be heated.

[0045] When the power switch 64 is pressed, the electromagnetic induction heating device 10 operates. That is, when the power switch 64 is pressed, power is supplied to the high frequency generating circuit 65, the microcomputer 66, and the tag reader / writer 67, causing the high frequency generating circuit 65, the microcomputer 66, and the tag reader / writer 67 to operate.

[0046] The high frequency generating circuit 65 is an example of a current supply circuit, and supplies an alternating current that generates a magnetic field to the IH coil 44. For example, the high frequency generating circuit 65 is an inverter circuit. For example, the high frequency generating circuit 65 supplies a high frequency alternating current of 20 KHz to the IH coil 44. A microcomputer 66 (hereinafter also referred to as a microcomputer 66) controls the operation of the high frequency generating circuit 65. For example, the microcomputer 66 obtains data read from an RFID (radio frequency identification) tag by a tag reader / writer 67, and controls the operation of the high frequency generating circuit 65. In addition, for example, the microcomputer 66 reads the operating state of the high frequency generating circuit 65, such as the frequency, voltage, and current of the high frequency generated by the high frequency generating circuit 65, from the high frequency generating circuit 65, and controls the operation of the high frequency generating circuit 65 by referring to these. The tag reader / writer 67 reads data such as the energization conditions for heating and the energization history from, for example, an RFID tag that records the energization conditions for heating and the energization history, or an RFID tag that records the energization conditions suitable for the object to be heated, and supplies the data to the microcomputer 66. The electromagnetic induction heating device 10 is provided with a safety protection function. For example, the microcomputer 66 can control the set temperature and the temperature duration of the metal plate 51 to limit unnecessary temperature rise and heating.

[0047] For example, if the metal plate 51 is made of iron or an iron alloy, when the tag reader / writer 67 reads the current supply conditions for heating iron or an iron alloy from the RFID tag, the microcomputer 66 commands the high frequency generating circuit 65 to operate at a normal frequency, which is the current supply condition for heating iron or an iron alloy. Then, the high frequency generating circuit 65 generates a high frequency voltage and current at a normal frequency of 20 KHz.

[0048] On the other hand, for example, if the metal plate 51 is made of aluminum or an aluminum alloy, when the tag reader / writer 67 reads the energization conditions for heating the aluminum or aluminum alloy from the RFID tag, the microcomputer 66 commands the high frequency generating circuit 65 to operate at a frequency of triple mode, which is the energization condition for heating the aluminum or aluminum alloy. Then, the high frequency generating circuit 65 generates a high frequency voltage and current of 60 KHz, which is the frequency of the triple mode. This makes it possible to suppress an increase in switching loss.

[0049] The battery box 25 stores a battery 81 and a charger 82. The battery 81 is a storage battery (secondary battery) such as a nickel-metal hydride battery or a lithium-ion battery, and supplies power to the entire electromagnetic induction heating device 10. At least, the battery 81 supplies power to the high-frequency generating circuit 65. The charger 82 charges the battery 81 with a commercial power supply 91 supplied from the outside. The battery 81 can be shared with other tools and other devices as long as it complies with a predetermined standard, such as the Japanese Industrial Standards or the standards of various device manufacturers. By providing a stand on which the electromagnetic induction heating device 10 can be placed and placing the electromagnetic induction heating device 10 on the stand so as to hide the metal plate 51, it is possible to prevent the heated metal plate 51 from touching anything other than the target object or from touching the worker. In order to prevent the metal plate 51 from touching anything other than the target object or from touching the worker, the electromagnetic induction heating device 10 can be provided with a rotatable, slidable, or detachable guard that can cover the metal plate 51.

[0050] As shown in FIG. 4, the battery 81 may be provided outside the main body 21 and supply power to the entire electromagnetic induction heating device 10 via a cable 83.

[0051] In this way, heat can be transferred more efficiently to the object to be heated.

[0052] As described above, the electromagnetic induction heating device 10 is held by an operator and used to heat an object. The IH coil 44 generates a magnetic field in which an eddy current is induced by passing an alternating current through it. The high-frequency generating circuit 65 supplies an alternating current to the IH coil 44. The battery 81 supplies power to the high-frequency generating circuit 65. The coil head 23 stores the IH coil 44. The metal plate 51 is provided separately from the coil head 23 so as to be in close proximity to the IH coil 44. When the IH coil 44 generates a magnetic field, an eddy current flows and the metal plate 51 is heated. The bolt 52 fixes the metal plate 51 to the coil head 23 while maintaining the gap 53 between the IH coil 44 and the metal plate 51. The electromagnetic induction heating device 10 heats the metal plate 51 by an operator pressing the metal plate 51 against the object.

[0053] The bolt 52 can be configured to adjust the distance between the coil head 23 and the metal plate 51, which is the length of the gap between the coil head 23 and the metal plate 51.

[0054] The metal plate 51 may be made of iron, aluminum or copper or an alloy of iron, aluminum or copper, and may have a thickness of 150 μm to 3 mm.

[0055] The metal plate 51 may be a metal mesh.

[0056] The metal plate 51 may be a punched metal.

[0057] At least one of the surfaces of the metal plate 51 can be embossed.

[0058] The metal plate 51 can be made deformable by an operator's operation.

[0059] The coil head 23 can be configured to be detachable from the main body 21 housing the high frequency generating circuit 65 .

[0060] Furthermore, the embodiments of the present invention are not limited to the above-described embodiments, and various modifications are possible without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0061] 10 Electromagnetic induction heating device, 21 Main body, 22 Handle, 23 Coil head, 24 Heat sink, 25 Battery box, 41 Coil storage section, 42 Insert section, 43 Plug, 44 IH coil, 45 Resonant circuit, 51 Metal plate, 52 Volt, 53 Gap, 61 Power switch, 62 Insert receptacle, 63 Socket, 64 Power switch, 65 High frequency generating circuit, 66 Microcomputer, 67 Tag reader / writer, 81 Battery, 82 Charger, 83 Cable, 91 Commercial power supply

Claims

1. In an electromagnetic induction heating device that is held by an operator and used to heat an object, An induction heating coil that generates a magnetic field in which an eddy current is induced by passing an alternating current through it; a current supply circuit for supplying the AC current to the induction heating coil; a battery for supplying power to the current supply circuit; a coil head for storing the induction heating coil; a metal plate provided separately from the coil head so as to be in close proximity to the induction heating coil, and in which the eddy current flows and is heated when the induction heating coil generates the magnetic field; a fixture that fixes the metal plate to the coil head while maintaining a gap between the coil head and the metal plate; Equipped with The worker presses the metal plate against the object to heat the object. Electromagnetic induction heating device.

2. 2. The electromagnetic induction heating device according to claim 1, The fastener is a bolt. Electromagnetic induction heating device.

3. 2. The electromagnetic induction heating device according to claim 1, The fixture is configured to be able to adjust the distance between the coil head and the metal plate, which is the length of the gap between the coil head and the metal plate. Electromagnetic induction heating device.

4. 2. The electromagnetic induction heating device according to claim 1, The metal plate is made of iron, aluminum, or copper, or an alloy of iron, aluminum, or copper, and has a thickness of 150 μm to 3 mm. Electromagnetic induction heating device.

5. 2. The electromagnetic induction heating device according to claim 1, The metal plate is made of a metal mesh. Electromagnetic induction heating device.

6. 2. The electromagnetic induction heating device according to claim 1, The metal plate is made of a punched metal. Electromagnetic induction heating device.

7. 2. The electromagnetic induction heating device according to claim 1, At least one of the surfaces of the metal plate is embossed. Electromagnetic induction heating device.

8. 2. The electromagnetic induction heating device according to claim 1, The metal plate is deformable by the operation of the worker. Electromagnetic induction heating device.

9. 2. The electromagnetic induction heating device according to claim 1, The coil head is configured to be detachable from a main body that houses the current supply circuit. Electromagnetic induction heating device.

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