Induction heating coil assembly and induction heating cooker

Abstract

To obtain an induction heating coil assembly and induction heating cooker with good manufacturability.SOLUTION: An induction heating coil assembly comprises: a coil provided in and on a substrate and having a coil pattern in which a conductor is wound in a spiral pattern multiple times; and a coil holding member which holds the coil. The coil substrate is fixed to the coil holding member, enabling easy alignment and improving manufacturability.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an induction heating coil assembly having an induction heating coil for heating an object to be heated, and an induction heating cooker. [Background technology]

[0002] Conventionally, induction cooking appliances have an induction heating coil below a top plate on which an object to be heated is placed. The induction heating coil is formed by spirally winding a magnet wire called a Litz wire, which is formed by twisting together multiple strands. The heating coil formed from the magnet wire is attached to a coil holding member (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-179086 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional technology described in Patent Document 1 and elsewhere, the shape of the magnet wire heating coil affects the heating performance of the object to be heated. For this reason, it is necessary to prevent the shape of the heating coil from deforming, for example, by fixing the magnet wire to a coil holding member with an adhesive. However, there has been an issue of poor manufacturability, such as difficulty in aligning the magnet wire heating coil when fixing it to a coil holding member with an adhesive, which can result in variations in the coil position and the height of the coil's upper surface.

[0005] In order to solve the above-mentioned problems, the present disclosure provides an induction heating coil assembly and an induction heating cooker that are easy to manufacture. [Means for solving the problem]

[0006] The induction heating coil assembly according to the present disclosure comprises a substrate, a coil provided on the substrate and having a coil pattern in which a conductor is wound spirally multiple times, and a coil holding member that holds the coil, and the substrate of the coil is fixed to the coil holding member.

[0007] An induction heating cooker according to the present disclosure includes the induction heating coil assembly described above. [Effects of the Invention]

[0008] According to the present disclosure, by providing a coil having a coil pattern on a substrate and attaching the substrate to a coil holding member to fix the coil and the coil holding member, alignment can be easily performed, thereby improving manufacturability when attaching the coil pattern to the coil holding member. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram showing a configuration example of an induction heating cooker 100 according to a first embodiment. [Figure 2] 1 is a perspective view showing an example of a configuration of an induction heating coil assembly 300 according to the first embodiment. [Figure 3] 2 is a perspective view showing an example of a configuration of a coil holding member 14 according to the first embodiment. FIG. [Figure 4] 1 is a plan view showing an example of the configuration of a coil 10 according to a first embodiment. [Figure 5] FIG. 1 is a perspective view showing an example of the configuration of an induction heating coil assembly 300 according to a first modification of the first embodiment. [Figure 6] FIG. 10 is a perspective view showing a coil holding member 14 according to a first modification of the first embodiment. [Figure 7] FIG. 2 is a perspective view showing a coil 10 according to a first modification of the first embodiment. [Figure 8] FIG. 10 is a perspective view showing a configuration example of an induction heating coil assembly 300 according to a second modification of the first embodiment. [Figure 9]10 is an enlarged view of the periphery of a rail portion 23 of a coil holding member 14 according to a second modification of the first embodiment. FIG. [Figure 10] FIG. 10 is a perspective view showing an example of the configuration of an induction heating coil assembly 300 according to a second embodiment. [Figure 11] 10 is a perspective view showing an example of a configuration of a coil holding member 14 according to a second embodiment. FIG. [Figure 12] 10 is a plan view showing an example of the configuration of a coil 10 according to a second embodiment. FIG. [Figure 13] 10 is a plan view showing another configuration example of the coil 10 according to the second embodiment. FIG. [Figure 14] FIG. 10 is a perspective view showing an example of the configuration of an induction heating coil assembly 300 according to a first modification of the second embodiment. [Figure 15] FIG. 10 is a perspective view showing a configuration example of an induction heating coil assembly 300 according to a second modification of the second embodiment. [Figure 16] FIG. 10 is a perspective view showing an example of the configuration of an induction heating coil assembly 300 according to a third embodiment. [Figure 17] FIG. 13 is a perspective view showing an example of the configuration of an induction heating coil assembly 300 according to a first modification of the third embodiment. [Figure 18] FIG. 13 is a perspective view showing an example of the configuration of an induction heating coil assembly 300 according to a second modification of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Embodiments of an induction heating coil assembly and an induction heating cooker according to the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to the following embodiments and can be modified in various ways without departing from the spirit and scope of the present disclosure. Furthermore, the present disclosure includes all possible combinations of the configurations shown in the following embodiments. The induction heating coil assembly and induction heating cooker shown in the drawings are examples of devices to which the technical concepts of the present disclosure are applied, and the embodiments shown in the drawings do not limit the applicable devices. In the following description, directional terms (e.g., "right," "left," "front," "rear," etc.) are used as appropriate to facilitate understanding, but these are for explanatory purposes and do not limit the content of the present disclosure. In the drawings, parts with the same reference numerals are identical or equivalent, and this applies throughout the entire specification. The relative dimensional relationships or shapes of the components in the drawings may differ from those in actuality.

[0011] Embodiment 1 FIG. 1 is a schematic diagram showing an example of the configuration of an induction heating cooker 100 according to the first embodiment. As shown in FIG. 1, the X-axis, Y-axis, and Z-axis are defined as directions that are equiangular with one another. The opposite direction of the Y-axis arrow is the vertical direction. The configuration of an induction heating cooker 100 equipped with an induction heating coil according to the first embodiment will be described with reference to FIG. 1. The induction heating cooker 100 according to the first embodiment has a top plate 1 on which an object to be heated 200, such as a pot or frying pan, is placed, and a generally box-shaped housing 2 provided below the top plate 1. Here, FIG. 1 shows a state in which the top plate 1 has been removed from the housing 2 and a portion of the housing 2 has been cut away in order to explain the internal structure of the housing 2.

[0012] The top plate 1 is made of a non-metallic material such as heat-resistant glass or ceramic. The top plate 1 is provided with heating ports 3, which are areas where the object to be heated 200 is placed. Here, FIG. 1 shows a case where three heating ports 3 are provided, but the number of heating ports 3 is not limited to three. Also, FIG. 1 shows a case where the shape of the heating port 3 is circular, but the shape of the heating port 3 is not limited to circular.

[0013] The top plate 1 is provided with an operation unit 4 that accepts operation inputs from the user, and a display unit 5 that displays information. The operation unit 4 is an input device such as a touch panel that accepts inputs regarding heating conditions such as the heating temperature or heating time of the induction heating cooker 100, as well as operation instructions such as starting or stopping heating. FIG. 1 shows a configuration example in which the operation unit 4 is provided on the top plate 1, but the operation unit 4 may be provided on the front surface of the housing 2 instead of the top plate 1. Alternatively, the operation unit 4 may be provided on the front surface of the housing 2 and on the top plate 1.

[0014] The display unit 5 displays whether heating is being performed at the heating port 3, the set temperature and heating mode, a timer, and warning information for the user. The display unit 5 is configured with a liquid crystal display or an LED (Light Emitting Diode), or a combination of these. FIG. 1 shows a configuration example in which the display unit 5 is provided on the top plate 1, but the display unit 5 may be provided on the front surface of the housing 2 instead of the top plate 1, or the display unit 5 may be provided on the front surface of the housing 2 and the top plate 1.

[0015] An induction heating coil assembly 300 is provided inside the housing 2 below the top plate 1. Also provided inside the housing 2 below the induction heating coil assembly 300 are an inverter circuit 6 that supplies high-frequency current to the induction heating coil assembly 300 and a control device 7 that controls heating and its stopping by the induction heating coil assembly 300. The induction heating coil assembly 300 is disposed below the heating port 3. The induction heating coil assembly 300 generates magnetic flux using the high-frequency current supplied from the inverter circuit 6, and the magnetic flux inductively heats the object to be heated 200 placed on the heating port 3. While FIG. 1 shows a configuration in which three induction heating coil assemblies 300 are provided corresponding to the three heating ports 3, one or more induction heating coil assemblies 300 may be provided. The configuration of the induction heating coil assembly 300 will be described in detail later.

[0016] The inverter circuit 6 has a rectifier circuit (not shown) that converts AC power into DC, and a drive circuit (not shown) that generates a high-frequency current from the DC and supplies it to the induction heating coil assembly 300. The drive circuit (not shown) is a well-known electric circuit such as a half-bridge inverter, a full-bridge inverter, or a single-transistor voltage resonant inverter. The drive circuit (not shown) is composed of switching elements such as IGBTs (Insulated Gate Bipolar Transistors) or MOSFETs (Metal Oxide Semiconductor Field Effect Transistors).

[0017] The hardware of the control device 7 is, for example, a dedicated circuit device that realizes the functions of the induction heating cooker 100. The hardware of the control device 7 may be configured, like a microcomputer, to have a memory that stores a software program and an arithmetic unit such as a processor that executes processing in accordance with the software program. The control device 7 controls the inverter circuit 6 based on settings input via the operation unit 4 by a user, thereby heating the object to be heated 200 with the induction heating coil assembly 300.

[0018] Fig. 2 is a perspective view showing an example configuration of induction heating coil assembly 300 according to embodiment 1. Next, the configuration of induction heating coil assembly 300 shown in Figs. 1 and 2 will be described. Induction heating coil assembly 300 is installed inside induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in Fig. 2 is vertical and the XZ plane is horizontal. Induction heating coil assembly 300 is made up of coil 10, magnetic plate 15, and coil holding member 14 for holding these.

[0019] FIG. 3 is a perspective view showing an example of the configuration of the coil holding member 14 according to the first embodiment. The coil holding member 14 is provided to hold the coil 10 and the magnetic plate 15. Furthermore, as described below, the coil holding member 14 restricts the movement of the substrate 11 to which the coil 10 is fixed with fixing screws 20 or the like, thereby suppressing warping of the substrate 11 due to heat. Of the two surfaces of the coil holding member 14, the surface on which the object to be heated 200 is placed via the top plate 1 of the induction heating cooker 100 is referred to as the "upper surface," and the opposite surface is referred to as the "lower surface." The coil 10 is attached to the upper surface of the coil holding member 14, and the magnetic plate 15 is attached to the lower surface. In addition to the coil 10, a shield ring 13 formed in a ring-shaped pattern from a conductor such as aluminum or copper, or an attachment portion such as a sensor, may be provided. The coil holding member 14 is disposed so as to surround the coil 10 when the induction heating coil assembly 300 is viewed from above. Although not particularly limited, the coil holding member 14 in the first embodiment has a through hole for dissipating heat from the coil 10.

[0020] The magnetic plate 15 is made of a ferromagnetic material such as ferrite. The magnetic plate 15 is provided on the rear surface side of the substrate 11, below the coil 10. The magnetic plate 15 increases the density of the magnetic flux generated around the coil 10, thereby increasing the input power to the object 200 to be heated. Fig. 3 shows a configuration example in which four magnetic plates 15 are arranged radially. Here, the number of magnetic plates 15 is not limited to four.

[0021] Fig. 4 is a plan view showing an example of the configuration of coil 10 according to embodiment 1. As shown in Fig. 4, coil 10 is composed of substrate 11, coil pattern portion 12, and shield ring 13, and is produced using the same manufacturing technology as that for printed wiring boards. Coil pattern portion 12 and shield ring 13 correspond to conductive wiring portions in a printed wiring board. Substrate 11 corresponds to an insulating substrate that electrically insulates wiring between wires in a printed wiring board.

[0022] The substrate 11 is made of an insulating material such as glass epoxy resin. Of the two surfaces of the substrate 11, the surface on which the object to be heated 200 is placed via the top plate 1 of the induction heating cooker 100 is referred to as the "front surface," and the opposite surface is referred to as the "back surface." In the induction heating coil assembly 300 shown in FIG. 2, a coil pattern section 12 is provided on the front surface of the substrate 11. However, this is not limited thereto, and the coil pattern section 12 may be provided on each of the front and back surfaces of the substrate 11, or the coil pattern section 12 may be provided on both the front and back surfaces.

[0023] The coil pattern unit 12 is formed by a pattern of a metal foil, such as copper foil, wound multiple times in a spiral shape. The coil pattern unit 12 functions as an electric circuit through which current flows. Both ends of the coil pattern unit 12 are connected to the inverter circuit 6, and the coil pattern unit 12 generates a high-frequency magnetic flux when power is supplied from the inverter circuit 6. The generated magnetic flux interlinks with the bottom surface of the object to be heated 200, such as a cooking utensil, placed on the top plate 1 directly above the induction heating coil assembly 300. When the magnetic flux interlinks with the bottom surface of the object to be heated 200, an eddy current is generated at the bottom surface. Joule heat is generated due to the resistance between the eddy current and the object to be heated 200, thereby heating the bottom surface of the object to be heated 200. Here, the coil pattern unit 12 is not limited to the pattern shape shown in FIG. 4. The coil pattern unit 12 may be formed by a single coil without a dividing surface wound spirally from the inner periphery to the outer periphery so that the radial conductor spacing is constant, or a divided coil with a dividing surface.

[0024] The shield ring 13 is disposed so as to surround the outer periphery of the coil pattern portion 12. The shield ring 13 serves to reduce leakage magnetic flux emitted to the outside of the housing 2 of the induction cooking appliance 100. This will be explained in detail. When the magnetic flux generated by the coil pattern portion 12 interlinks with the shield ring 13, an eddy current is generated in the shield ring 13 in a direction that cancels out the generated magnetic flux, thereby reducing leakage magnetic flux to the surroundings. The shield ring 13 is formed in an annular pattern on the same substrate 11 as the coil 10, for example, from the same metal foil such as copper foil as the coil pattern portion 12. However, this is not limited to this, and the shield ring 13 may also be formed in an annular pattern from a conductor such as aluminum or copper, separate from the coil 10.

[0025] As shown in Fig. 2, the coil 10 is attached to the upper surface of the coil holding member 14. At this time, the substrate 11 of the coil 10 and the coil holding member 14 are fixed with fixing screws 20 in an area other than the area where the coil pattern portion 12 is formed on the substrate 11. Here, Fig. 2 shows an example of a configuration in which the four corners of the substrate 11 are fixed with fixing screws 20, but the fixing locations and number of fixing screws 20 are not limited to those shown in Fig. 2, and it is sufficient that two or more fixing screws are provided on the substrate 11.

[0026] As described above, according to the first embodiment, the coil 10 of the induction heating coil assembly 300 is produced by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that used for printed wiring boards. This makes it possible to fix the substrate 11 to the coil holding member 14 using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, by fixing the substrate 11 and the coil holding member 14 with the fixing screws 20, alignment is easier and manufacturability is improved compared to the conventional method of fixing the substrate 11 to the coil holding member 14 using an adhesive or the like.

[0027] <First Modification of First Embodiment> Fig. 5 is a perspective view showing a configuration example of an induction heating coil assembly 300 according to a first modification of the first embodiment. The induction heating coil assembly 300 is installed inside the induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in Fig. 5 is vertical and the XZ plane is horizontal. The induction heating coil assembly 300 is made up of a coil 10, a magnetic plate 15, and a coil holding member 14 for holding these.

[0028] FIG. 6 is a perspective view showing a coil holding member 14 according to a first modification of the first embodiment. Protruding structures 21 that protrude upward are provided on the top surface of the coil holding member 14. The protruding height of the protruding structures 21 is equal to or greater than the thickness of the substrate 11 that constitutes the coil 10 of the induction heating coil assembly 300. The protruding structures 21 in FIG. 6 have a rectangular prism shape, and further, an example is shown in which claw structures that protrude horizontally in the XZ plane are formed at the top ends of the protruding structures 21. However, the shape of the protruding structures 21 is not limited to the example shown in FIG. 6 as long as they extend in the Y-axis direction from the top surface of the coil holding member 14. Furthermore, while FIG. 6 shows a configuration example in which the protruding structures 21 are provided at the four corners of the substrate 11, the positions and number of the protruding structures 21 are not limited to those shown in the figure, and the protruding structures 21 may be provided in one or more locations.

[0029] 7 is a perspective view showing a coil 10 according to a first modification of the first embodiment. Fixing holes 22, which are through holes, are provided in a substrate 11 of the coil 10. The positions and number of the fixing holes 22 are the same as those of the protruding structures 21 provided in the coil holding member 14.

[0030] As shown in Fig. 5, the coil 10 is attached to the upper surface of the coil holding member 14. At this time, the coil 10 is fixed to the coil holding member 14 by fitting a protruding structure 21 provided on the coil holding member 14 into a fixing hole 22 provided in the substrate 11 of the coil 10. The claw at the tip of the protruding structure 21 protruding from the fixing hole 22 acts as a stopper to lock the coil 10 so that it does not come off the coil holding member 14.

[0031] According to the first modification of the first embodiment, the induction heating coil assembly 300 is manufactured using a manufacturing technique similar to that for printed wiring boards. Therefore, the substrate 11 is arranged around the coil pattern portion 12, and it is possible to fix the coil 10 to the coil holding member 14 using the substrate 11. The coil 10 of the induction heating coil assembly 300 is manufactured by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that for printed wiring boards. Therefore, it is possible to fix the substrate 11 to the coil holding member 14 using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, the substrate 11 and the coil holding member 14 are fixed by a protruding structure 21 provided on the coil holding member 14 and a fixing hole 22 provided in the substrate 11. Therefore, compared to the conventional method of fixing the substrate 11 to the coil holding member 14 using an adhesive or the like, alignment is easier and manufacturability is improved.

[0032] <Second Modification of First Embodiment> Fig. 8 is a perspective view showing a configuration example of an induction heating coil assembly 300 according to Modification 2 of Embodiment 1. The induction heating coil assembly 300 is installed inside the induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in Fig. 8 is vertical and the XZ plane is horizontal. The induction heating coil assembly 300 is made up of a coil 10, a magnetic plate 15, and a coil holding member 14 for holding these.

[0033] As shown in Fig. 8, coil 10 is attached to the upper surface of coil holding member 14. At this time, rail portions 23 are provided on the upper surface of coil holding member 14, and substrate 11 of coil 10 is inserted along rail portions 23, thereby restricting the range of movement of coil 10 in the vertical direction and fixing coil 10 to coil holding member 14. Here, Fig. 8 shows a configuration example in which two sides of substrate 11 are fixed by rail portions 23, but the locations and number of fixing points by rail portions 23 are not limited to the example shown in Fig. 8.

[0034] FIG. 9 is an enlarged view of the periphery of rail portion 23 of coil holding member 14 according to Modification 2 of Embodiment 1. FIG. 9 is an enlarged view of a portion of a cross section of coil holding member 14, including rail portion 23, cut along the rail portion 23. Next, the configuration of rail portion 23 provided on coil holding member 14 will be described. A board boosting structure 24 is provided in the rail groove of rail portion 23 of coil holding member 14. When board 11 is inserted into the groove of rail portion 23 of coil holding member 14, it passes over the board boosting structure 24 and is pushed up toward top plate 1. By contacting rail portion 23, the range of vertical movement of coil 10 is further restricted. Here, board boosting structure 24 may have any shape so that the distance from the top surface of board boosting structure 24 to the top surface of coil holding member 14 decreases as the board 11 approaches the insertion side. For example, as shown in FIG. 9, the board boosting structure 24 may have a structure in which an elastic spring is attached, or may have a sloped shape.

[0035] According to the second modification of the first embodiment, the coil 10 of the induction heating coil assembly 300 is produced by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that used for printed wiring boards. This makes it possible to fix the substrate 11 to the coil holding member 14 by using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, by fixing the substrate 11 and the coil holding member 14 with the rail portion 23, alignment is easier and manufacturability is improved compared to the conventional method of fixing the substrate 11 to the coil holding member 14 using an adhesive or the like.

[0036] Furthermore, a board push-up structure 24 is provided on the rail portion 23, and the board push-up structure 24 pushes up the board 11 upward, fixing the board 11 to the coil holding member 14. Therefore, regardless of the thickness of the board 11 in the coil 10, the coil 10 can be fixed closer to the top plate 1. This allows the distance between the object to be heated 200 placed on the top plate 1 and the coil 10 to be reduced, increasing the magnetic flux density interlinking with the object to be heated 200. This allows the heating efficiency of the induction heating cooker 100 and the induction heating coil assembly 300 to be improved.

[0037] Embodiment 2 FIG. 10 is a perspective view showing an example configuration of an induction heating coil assembly 300 according to embodiment 2. Here, the configuration of induction heating coil assembly 300 in embodiment 2 will be described. Induction heating coil assembly 300 is installed inside induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in FIG. 10 is vertical and the XZ plane is horizontal. Induction heating coil assembly 300 is composed of coil 10, magnetic plate 15, and coil holding member 14 for holding these. Here, differences between induction heating coil assembly 300 of embodiment 2 and embodiment 1 will be described in detail, and detailed description of configurations similar to those described in embodiment 1 may be omitted.

[0038] FIG. 11 is a perspective view showing an example of the configuration of a coil holding member 14 according to the second embodiment. The coil holding member 14 is provided to hold the coil 10 and the magnetic plate 15. Of the two surfaces of the coil holding member 14, the surface on which the object to be heated 200 is placed via the top plate 1 of the induction cooking appliance 100 is referred to as the "upper surface," and the opposite surface is referred to as the "lower surface." The coil 10 is attached to the upper surface of the coil holding member 14, and the magnetic plate 15 is attached to the lower surface. In addition to the coil 10, a shield ring 13 formed in a ring-shaped pattern from a conductor such as aluminum or copper, and an attachment portion for a sensor, etc. may also be provided.

[0039] FIG. 12 is a plan view showing a configuration example of a coil 10 according to the second embodiment. The coil 10 has coil pattern portions 12 formed on a single substrate 11, the number of which is equal to the number of heating ports 3 in the induction cooking device 100. Here, the coil pattern portions 12 may be arranged on both the front and back surfaces of the substrate 11, or the coil pattern portions 12 may be provided on both the front and back surfaces. The coil pattern portion 12 may be formed of a single coil without a dividing surface, wound spirally from the inner periphery to the outer periphery so that the conductor spacing in the radial direction is constant, or may be a divided coil with a dividing surface. The multiple coil pattern portions 12 may be a combination of these.

[0040] Fig. 13 is a plan view showing another configuration example of the coil 10 according to embodiment 2. Here, in Fig. 13, the multiple coil pattern portions 12 are represented by regions. The shield ring 13, which is a component of the induction heating coil assembly 300, may be common to the multiple coil pattern portions 12, as shown in Fig. 13.

[0041] As shown in Fig. 10, the coil 10 is attached to the upper surface of the coil holding member 14. At this time, the substrate 11 around the coil pattern 18 of the coil 10 and the coil holding member 14 are fixed with fixing screws 20. Here, Fig. 10 shows an example of a configuration in which the four corners of the substrate 11 are fixed with the fixing screws 20, but the fixing locations and number of the fixing screws 20 are not limited to those shown in Fig. 10, and it is sufficient that the fixing screws 20 are provided at two or more locations on the substrate 11.

[0042] As described above, according to the second embodiment, the coil 10 of the induction heating coil assembly 300 is produced by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that used for printed wiring boards. This makes it possible to fix the substrate 11 to the coil holding member 14 using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, by fixing the substrate 11 and the coil holding member 14 with the fixing screws 20, alignment is easier and manufacturability is improved compared to when the substrate 11 is fixed to the coil holding member 14 using an adhesive as in the past.

[0043] Moreover, the coil 10 in the second embodiment is produced using the same manufacturing technology as that for printed wiring boards. Therefore, a plurality of coil pattern portions 12 can be formed on a single substrate 11 at once, which simplifies the manufacturing process. Furthermore, compared to the case where a plurality of induction heating coil assemblies 300, each having one coil pattern portion 12, are attached, the number of parts can be reduced, which simplifies the manufacturing process.

[0044] <First Modification of Second Embodiment> Fig. 14 is a perspective view showing a configuration example of an induction heating coil assembly 300 according to Modification 1 of Embodiment 2. The induction heating coil assembly 300 is installed inside the induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in Fig. 14 is vertical and the XZ plane is horizontal. The induction heating coil assembly 300 is made up of a coil 10, a magnetic plate 15, and a coil holding member 14 for holding these.

[0045] In the induction heating coil assembly 300 of Fig. 14, a protruding structure 21 is provided on the upper surface of the coil holding member 14. The protruding height of the protruding structure 21 is equal to or greater than the thickness of the substrate 11 that constitutes the coil 10 of the induction heating coil assembly 300. The protruding structure 21 in Fig. 14 has a rectangular prism shape, and further shows an example in which a claw structure that protrudes horizontally in the XZ plane is formed at the upper tip of the protruding structure 21. However, the shape of the protruding structure 21 is not limited to the example shown in Fig. 14, and it may have a structure that extends in the Y-axis direction from the upper surface of the coil holding member 14. Furthermore, Fig. 14 shows an example configuration in which the protruding structures 21 are provided at the four corners of the substrate 11, but the positions and number of the protruding structures 21 are not limited to those shown in the figure and may be one or more.

[0046] 14, in the induction heating coil assembly 300 of the second embodiment, the substrate 11 of the coil 10 is provided with fixing holes 22, as in the first embodiment. The positions and number of the fixing holes 22 are the same as those of the protruding structures 21 provided on the coil holding member 14.

[0047] As shown in Fig. 14, the coil 10 is attached to the upper surface of the coil holding member 14. At this time, the coil 10 is fixed to the coil holding member 14 by fitting a protruding structure 21 provided on the coil holding member 14 into a fixing hole 22 provided in the substrate 11 of the coil 10. The claw at the tip of the protruding structure 21 protruding from the fixing hole 22 acts as a stopper to lock the coil 10 so that it does not come off the coil holding member 14.

[0048] According to the first modification of the second embodiment, the coil 10 of the induction heating coil assembly 300 is produced by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that for printed wiring boards. This makes it possible to fix the substrate 11 to the coil holding member 14 using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, the substrate 11 and the coil holding member 14 are fixed by a protruding structure 21 provided on the coil holding member 14 and a fixing hole 22 provided in the substrate 11. This makes alignment easier and improves manufacturability compared to the conventional method of fixing the substrate 11 to the coil holding member 14 using an adhesive or the like.

[0049] Moreover, the coil 10 in the first modification of the second embodiment is produced using the same manufacturing technology as that for printed wiring boards. Therefore, a plurality of coil pattern portions 12 can be formed on a single substrate 11 at once, which simplifies the manufacturing process. Moreover, compared to the case where a plurality of induction heating coil assemblies 300, each having one coil pattern portion 12, are attached, the number of parts can be reduced, which simplifies the manufacturing process.

[0050] <Modification 2 of Embodiment 2> Fig. 15 is a perspective view showing a configuration example of an induction heating coil assembly 300 according to Modification 2 of Embodiment 2. The induction heating coil assembly 300 is installed inside the induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in Fig. 15 is vertical and the XZ plane is horizontal. The induction heating coil assembly 300 is made up of a coil 10, a magnetic plate 15, and a coil holding member 14 for holding these.

[0051] Rail portions 23 are provided on the upper surface of coil holding member 14, and substrate 11 of coil 10 is inserted along rail portions 23, thereby restricting the range of vertical movement of coil 10 and fixing coil 10 to coil holding member 14. Although not shown in FIG. 15 , substrate push-up structures 24 are installed in the grooves of rail portions 23 of coil holding member 14, as described in the first embodiment. Substrate 11 inserted into rail portions 23 of coil holding member 14 passes over the top of substrate push-up structures 24, thereby pushing up toward top plate 1, further restricting the range of vertical movement of coil 10. Here, FIG. 15 shows a configuration example in which two sides of substrate 11 are fixed by rail portions 23, but the locations and number of locations fixed by rail portions 23 are not limited to the example shown in FIG. 15 .

[0052] According to the second modification of the second embodiment, the coil 10 of the induction heating coil assembly 300 is produced by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that for printed wiring boards. This makes it possible to fix the substrate 11 to the coil holding member 14 by using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, by fixing the substrate 11 and the coil holding member 14 with the rail portion 23, alignment is easier and manufacturability is improved compared to the conventional case where the substrate 11 is fixed to the coil holding member 14 using an adhesive or the like.

[0053] Furthermore, a board push-up structure 24 is provided on the rail portion 23, and the board push-up structure 24 pushes up the board 11 upward, fixing the board 11 to the coil holding member 14. Therefore, regardless of the thickness of the board 11 in the coil 10, the coil 10 can be fixed closer to the top plate 1. This allows the distance between the object to be heated 200 placed on the top plate 1 and the coil 10 to be reduced, increasing the magnetic flux density interlinking with the object to be heated 200. This allows the heating efficiency of the induction heating cooker 100 and the induction heating coil assembly 300 to be improved.

[0054] The coil 10 in the second modification of the second embodiment is produced using the same manufacturing technology as that for printed wiring boards. Therefore, a plurality of coil pattern portions 12 can be formed on a single substrate 11 at once, which simplifies the manufacturing process. Furthermore, compared to attaching a plurality of induction heating coil assemblies 300, each having one coil pattern portion 12, the number of parts can be reduced, which simplifies the manufacturing process.

[0055] Embodiment 3 FIG. 16 is a perspective view showing an example configuration of an induction heating coil assembly 300 according to embodiment 3. Here, the configuration of induction heating coil assembly 300 in embodiment 3 will be described. Induction heating coil assembly 300 is installed inside induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in FIG. 16 is vertical and the XZ plane is horizontal. Induction heating coil assembly 300 is composed of coil 10, magnetic plate 15, and coil holding member 14 for holding these. Here, differences between induction heating coil assembly 300 of embodiment 3 and embodiment 1 will be described in detail, and detailed description of configurations similar to those described in embodiment 1 may be omitted.

[0056] As shown in Fig. 16, multiple coils 10 are attached to the upper surface of one coil holding member 14. At this time, the substrate 11 around the coil pattern 18 of each coil 10 and the coil holding member 14 are fixed with fixing screws 20. Here, Fig. 16 shows an example configuration in which the four corners of the substrate 11 of each coil 10 are fixed with fixing screws 20, but the fixing locations and number of fixing screws 20 are not limited to those shown in Fig. 16, and it is sufficient that two or more fixing screws 20 are provided on the substrate 11 per coil 10.

[0057] As described above, according to the third embodiment, the coil 10 of the induction heating coil assembly 300 is produced by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that used for printed wiring boards. This makes it possible to fix the substrate 11 to the coil holding member 14 by using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, by fixing the substrate 11 and the coil holding member 14 with the fixing screws 20, alignment is easier and manufacturability is improved compared to when the substrate 11 is fixed to the coil holding member 14 using an adhesive as in the prior art.

[0058] Furthermore, in embodiment 3, by attaching multiple coils 10 to one coil holding member 14, the number of attachment parts can be reduced compared to when multiple coil holding members 14 are provided, thereby simplifying the manufacturing process.

[0059] <First Modification of Third Embodiment> Fig. 17 is a perspective view showing one configuration example of an induction heating coil assembly 300 according to Modification 1 of Embodiment 3. The induction heating coil assembly 300 is installed inside the induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in Fig. 17 is vertical and the XZ plane is horizontal. The induction heating coil assembly 300 is made up of multiple coils 10, a magnetic plate 15, and one coil holding member 14 for holding these.

[0060] In the induction heating coil assembly 300 of Fig. 17, a protruding structure 21 is provided on the upper surface of the coil holding member 14. The protruding height of the protruding structure 21 is equal to or greater than the thickness of the substrate 11 that constitutes the coil 10 of the induction heating coil assembly 300. Fig. 17 shows an example in which the protruding structure 21 has a rectangular prism shape, and further, a claw structure that protrudes horizontally in the XZ plane is formed at the upper tip of the protruding structure 21. However, the shape of the protruding structure 21 is not limited to the example shown in Fig. 17, and it may have a structure that extends in the Y-axis direction from the upper surface of the coil holding member 14. Furthermore, Fig. 17 shows an example configuration in which the protruding structures 21 are provided at the four corners of the substrate 11, but the positions and number of the protruding structures 21 are not limited to those shown in the figure, and they may be provided in one or more locations.

[0061] 17, the coil 10 is attached to the upper surface of the coil holding member 14. At this time, the coil 10 is fixed to the coil holding member 14 by fitting a protruding structure 21 provided on the coil holding member 14 into a fixing hole 22 provided in the substrate 11 of the coil 10. The claw at the tip of the protruding structure 21 protruding from the fixing hole 22 acts as a stopper to lock the coil 10 so that it does not come off the coil holding member 14.

[0062] According to the first modification of the third embodiment, the coil 10 of the induction heating coil assembly 300 is produced by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that for printed wiring boards. This makes it possible to fix the substrate 11 to the coil holding member 14 using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, the substrate 11 and the coil holding member 14 are fixed by a protruding structure 21 provided on the coil holding member 14 and a fixing hole 22 provided in the substrate 11. This makes alignment easier and improves manufacturability compared to the conventional method of fixing the substrate 11 to the coil holding member 14 using an adhesive or the like.

[0063] Furthermore, in the first modification of the third embodiment, it is not necessary to provide a plurality of coil holding members 14, so the number of attachment parts can be reduced, and the manufacturing process can be simplified.

[0064] <Modification 2 of Embodiment 3> Fig. 18 is a perspective view showing a configuration example of an induction heating coil assembly 300 according to Modification 2 of Embodiment 3. The induction heating coil assembly 300 is installed inside the induction heating cooker 100 so that the direction opposite to the Y-axis arrow shown in Fig. 18 is vertical and the XZ plane is horizontal. The induction heating coil assembly 300 is made up of multiple coils 10, a magnetic plate 15, and one coil holding member 14 for holding these.

[0065] Rail portions 23 are provided on the upper surface of coil holding member 14, and substrate 11 of coil 10 is inserted along rail portions 23, thereby restricting the range of vertical movement of coil 10 and fixing coil 10 to coil holding member 14. Although not shown in FIG. 18 , board push-up structures 24 are installed in the grooves of rail portions 23 of coil holding member 14, as described in the first embodiment. Board 11 inserted into rail portions 23 of coil holding member 14 passes over the board push-up structures 24 and is pushed up toward top plate 1, further restricting the range of vertical movement of coil 10. Here, FIG. 18 shows a configuration example in which two sides of board 11 are fixed by rail portions 23, but the locations and number of parts fixed by rail portions 23 are not limited to the example shown in FIG. 18 .

[0066] According to the second modification of the third embodiment, the coil 10 of the induction heating coil assembly 300 is produced by forming the coil pattern portion 12 on the substrate 11 using a manufacturing technique similar to that used for printed wiring boards. This makes it possible to fix the substrate 11 to the coil holding member 14 by using an area of ​​the substrate 11 other than the area where the coil pattern portion 12 is formed. Furthermore, by fixing the substrate 11 and the coil holding member 14 with the rail portion 23, alignment is easier and manufacturability is improved compared to the conventional method of fixing the substrate 11 to the coil holding member 14 using an adhesive or the like.

[0067] Furthermore, a board push-up structure 24 is provided on the rail portion 23, and the board push-up structure 24 pushes up the board 11 upward, fixing the board 11 to the coil holding member 14. Therefore, regardless of the thickness of the board 11 in the coil 10, the coil 10 can be fixed closer to the top plate 1. This allows the distance between the object to be heated 200 placed on the top plate 1 and the coil 10 to be reduced, increasing the magnetic flux density interlinking with the object to be heated 200. This allows the heating efficiency of the induction heating cooker 100 and the induction heating coil assembly 300 to be improved.

[0068] Furthermore, in the second modification of the third embodiment, it is not necessary to provide a plurality of coil holding members 14, so the number of attachment parts can be reduced, and the manufacturing process can be simplified.

[0069] Embodiment 4 In the above-described first to third embodiments, the fixing of the substrate 11 and the coil holding member 14 by the fixing screws 20, the protruding structures 21, the fixing holes 22, and the rails 23 has been described individually, but these may also be used in combination. For example, the substrate 11 may be inserted along the rails 23 to restrict movement, and then fixed with the fixing screws 20.

[0070] Various aspects of the present disclosure are summarized below as appendices.

[0071] (Appendix 1) a substrate and a coil provided on the substrate, the coil having a coil pattern in which a conductor is wound in a spiral shape multiple times; a coil holding member for holding the coil; Equipped with an induction heating coil assembly in which the substrate of the coil is fixed to the coil holding member; (Appendix 2) the coil has one of the substrates and one of the coil patterns; 2. The induction heating coil assembly of claim 1, wherein two or more of the substrates are fixed to the coil holding member. (Appendix 3) the coil has one of the substrates and at least two or more of the coil patterns; 2. The induction heating coil assembly of claim 1, wherein one or more of the substrates are fixed to the coil holding member. (Appendix 4) 4. The induction heating coil assembly according to claim 1, wherein the substrate and the coil holding member are fixed together by a screw. (Appendix 5) the coil holding member has a protruding structure, The substrate has fixing holes; 4. The induction heating coil assembly according to claim 1, wherein the protruding structure is passed through and fitted into the fixing hole to fix the substrate and the coil holding member. (Appendix 6) The fixing hole is a through hole, The protruding structure has a claw at a tip thereof, 6. An induction heating coil assembly as described in Appendix 5, wherein the claws protruding from the fixing holes are engaged with the substrate. (Appendix 7) the coil holding member has a rail portion, 5. The induction heating coil assembly according to claim 1, wherein the substrate is inserted into the rail portion, and the substrate and the coil holding member are fixed together. (Appendix 8) 8. The induction heating coil assembly according to claim 7, wherein the rail portion has a substrate lifting structure that lifts the substrate and restricts movement of the substrate. (Appendix 9) An induction heating cooker comprising the induction heating coil assembly according to any one of Supplementary notes 1 to 8. [Explanation of symbols]

[0072] 1 top plate, 2 housing, 3 heating port, 4 operation unit, 5 display unit, 6 inverter circuit, 7 control device, 10 coil, 11 circuit board, 12 coil pattern unit, 13 shield ring, 14 coil holding member, 15 magnetic plate, 20 fixing screw, 21 protruding structure unit, 22 fixing hole, 23 rail unit, 24 circuit board push-up structure unit, 100 induction heating cooker, 200 object to be heated, 300 induction heating coil assembly.

Claims

1. a substrate and a coil provided on the substrate, the coil having a coil pattern in which a conductor is wound in a spiral shape multiple times; a coil holding member for holding the coil; Equipped with an induction heating coil assembly in which the substrate of the coil is fixed to the coil holding member;

2. the coil has one of the substrates and one of the coil patterns; The induction heating coil assembly of claim 1 , wherein two or more of the substrates are secured to the coil retaining member.

3. the coil has one of the substrates and at least two or more of the coil patterns; The induction heating coil assembly of claim 1 , wherein one or more of the substrates are secured to the coil retaining member.

4. 4. The induction heating coil assembly according to claim 1, wherein the substrate and the coil holding member are fixed together by screws.

5. the coil holding member has a protruding structure, The substrate has fixing holes; 4. The induction heating coil assembly according to claim 1, wherein the protruding structure is passed through and fitted into the fixing hole to fix the substrate and the coil holding member.

6. The fixing hole is a through hole, The protruding structure has a claw at a tip thereof, 6. The induction heating coil assembly according to claim 5, wherein the claws projecting from the fixing holes are engaged with the substrate.

7. the coil holding member has a rail portion, 4. The induction heating coil assembly according to claim 1, wherein the substrate is inserted into the rail portion, and the substrate and the coil holding member are fixed together.

8. 8. The induction heating coil assembly according to claim 7, wherein the rail portion has a substrate lifting structure that lifts up the substrate and restricts movement of the substrate.

9. An induction heating cooker comprising the induction heating coil assembly according to any one of claims 1 to 3.

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