WO2022050398A1 - Bobine et dispositif de chauffage - Google Patents

Bobine et dispositif de chauffage Download PDF

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Publication number
WO2022050398A1
WO2022050398A1 PCT/JP2021/032540 JP2021032540W WO2022050398A1 WO 2022050398 A1 WO2022050398 A1 WO 2022050398A1 JP 2021032540 W JP2021032540 W JP 2021032540W WO 2022050398 A1 WO2022050398 A1 WO 2022050398A1
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Prior art keywords
coil
winding
thin film
heating
copper thin
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PCT/JP2021/032540
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English (en)
Japanese (ja)
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将人 岡部
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大日本印刷株式会社
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Publication of WO2022050398A1 publication Critical patent/WO2022050398A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/44—Coil arrangements having more than one coil or coil segment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present invention belongs to the technical field of coils and heating devices. More specifically, it belongs to the technical field of a heating device for inducing heating a heated body such as a metal pot to heat, for example, foodstuffs and the like contained in the heated body, and a coil for the heating device.
  • IH Induction Heating
  • IH Induction Heating
  • a cooker such as the IH cooking heater typically has the coil (that is, a cooking heating port) configured by winding a so-called litz wire or the like in which a plurality of coated conductors are twisted in a plane, and simultaneously having a plurality of coils. In many cases, it has a plurality of the above coils so that the ingredients of the above can be cooked.
  • Such IH cooking heaters are roughly classified into so-called built-in type and stationary type from the viewpoint of installation method in the kitchen.
  • the built-in type IH cooking heater is a top plate in which a cooker body (housing) including an IH cooking heater is inserted into a storage portion (mounting hole) provided in a system kitchen, and the top plate protrudes from the upper surface of the cooker body. It is installed by placing the peripheral edge on the edge (worktop) around the storage section.
  • Examples of the prior art document showing the prior art relating to such an IH cooking heater include the following Patent Document 1.
  • the present invention has been made in view of the above requirements, and examples of the problems are further weight reduction and thinning, improvement of transmission efficiency as an IH cooking heater, and prevention of an increase in operating temperature. It is an object of the present invention to provide a coil that can be compatible with each other and a heating device using the coil.
  • the invention according to claim 1 is a coil used for heating an object to be heated by induction heating, which is wound from the outer peripheral side to the inner peripheral side of the coil and is a thin film conductor. It is provided with an outer / inner winding line made of, and an inner / outer winding line which is wound from the inner peripheral side toward the outer peripheral side and is made of a thin film conductor and is laminated on the outer / inner winding line with an insulating layer interposed therebetween.
  • the position seen from the center of the coil of each winding of the outer and inner winding lines and the position seen from the center of each winding of the inner and outer winding lines coincide with each other in a plan view.
  • the invention according to claim 5 has the coil according to any one of claims 1 to 4, and the heated body on which the heated body is mounted.
  • a mounting plate arranged between the coils and a power supply means for supplying electric power for heating to the coils are provided.
  • an outer / inner winding line made of a thin film conductor and an inner / outer winding line made of a thin film conductor and laminated on the outer / inner winding line with an insulating layer interposed therebetween are provided.
  • the position seen from the center of each winding of the outer and inner winding lines and the position seen from the center of each winding of the inner and outer winding lines coincide with each other in a plan view. Therefore, it is possible to reduce the AC resistance as a coil due to the so-called skin effect or proximity effect caused by forming the winding line of the coil with a thin film conductor for the purpose of weight reduction and thinning, and the weight reduction and thinning can be achieved. It is possible to achieve both improvement of the transmission efficiency of the coil itself and prevention of an increase in the operating temperature.
  • the skin effect is generally that when a high-frequency current is passed through a thin film conductor, the current density is high on the surface of the thin film conductor, becomes lower toward the center from the surface, and the frequency of the current becomes higher. Indeed, the current is concentrated on the surface, and as a result, the AC resistance of the thin film conductor increases. Further, the proximity effect is an electrical phenomenon that reduces the efficiency of the coil as in the skin effect due to the thin film conductors being close to each other in the winding as a coil.
  • the invention according to claim 2 describes the transition portion of each winding of the outer and inner winding lines in the radial direction of the coil and the inner and outer windings of the coil according to claim 1.
  • the transition portion in the winding of the winding line is formed at a position along one radius in the coil.
  • the transition portion in the winding of the outer / inner winding line and the transition part in the winding of the inner / outer winding line are coiled. It is formed at a position along one radius in. Therefore, by increasing the winding part of the inner / outer winding line and the winding part of the outer / inner winding line whose positions seen from the center of the coil match in a plan view, the transmission efficiency is further improved and the operating temperature rises. Can be further prevented.
  • the invention according to claim 3 is the coil according to claim 1 or 2, wherein the coil includes the outer inner winding line and the inner / outer winding line. Is circular.
  • the overall shape of the coil including the outer inner winding line and the inner / outer winding line is circular in a plan view. Therefore, it is possible to efficiently heat the heated object by adapting it to the general plan view shape of the heated object such as a pot.
  • the invention according to claim 4 is the coil according to any one of claims 1 to 3, in which a part of the winding in the outer inner winding line and the inner and outer windings are performed.
  • a part of the winding in the winding line is formed on the peripheral side of the coil when viewed from the center, and the other part of the winding in the outer inner winding line and the other winding in the inner / outer winding line.
  • a part of the coil is formed on the center side of the coil when viewed from the center.
  • a part of the winding in the outer and inner winding lines and the winding in the inner and outer winding lines is formed on the peripheral side of the coil when viewed from the center of the coil, and the other part of the winding in the outer / inner winding line and the other part of the winding in the inner / outer winding line are seen from the center. It is formed on the center side of the coil. Therefore, the wound body can be efficiently heated by the winding lines on the peripheral side and the central side.
  • an outer / inner winding line made of a thin film conductor and an inner / outer winding line made of a thin film conductor and laminated on the outer / inner winding line with an insulating layer interposed therebetween are provided, and each winding of the outer / inner winding line is provided.
  • the position seen from the center of the coil and the position seen from the center of each winding of the inner and outer winding lines coincide with each other in a plan view.
  • FIG. 1 It is a top view (iii) which shows the structure of the heating coil of a conventional example. It is a figure which shows the relationship between the frequency and the inductance as an effect by the structure of the heating coil of an embodiment. It is a figure which shows the relationship between a frequency and a Q value as an effect by the structure of the heating coil of an embodiment.
  • FIG. 1 is a perspective view or the like schematically showing the whole of the induction heating type cooker of the embodiment.
  • the cooker 1 of the embodiment includes a so-called built-in type IH cooking heater installed in a storage portion provided on a worktop of the kitchen.
  • the cooker 1 of the embodiment is roughly a heat-resistant top plate (hereinafter, "top") made of heat-resistant glass or the like, which covers almost the entire main body portion 2 mainly made of sheet metal or the like and the upper surface thereof. It is provided with 3) 3, a heating unit 10, a heating unit 20a and a heating unit 20b, and a cooking grill 4.
  • This top plate 3 corresponds to an example of the "mounting plate” of the present invention.
  • the cooker 1 of the embodiment includes an intake window 5 provided on the back side of the top plate 3, a pair of exhaust windows 6a, and an exhaust window 6b.
  • the present invention will be exemplified by using a cooker 1 having a so-called center grill structure in which a cooking grill 4 is arranged substantially in the center of the main body 2, but the present invention includes this.
  • the present invention is not limited, and can be similarly applied to a cooking grill 4 that is biased to either side (a cooker having a so-called side grill structure) or a cooker that does not have the cooking grill 4. Is.
  • the cooker 1 of the embodiment has an operation panel 7 used for the user to operate the heating unit 10, the heating unit 20a and the heating unit 20b, and the cooking grill 4, and the heating power adjustment for adjusting the heating power (output power).
  • a dial 8a and a thermal power adjustment dial 8b are provided.
  • the configuration and arrangement position of the operation panel 7, the thermal power adjustment dial 8a, and the thermal power adjustment dial 8b are not limited to those shown in the drawings.
  • the adjustment dial 8b and the cooking grill 4 may be arranged together on the opposite side.
  • the heating unit 10, the heating unit 20a, and the heating unit 20b which play a central role in the heating function of the cooker 1 of the embodiment, will be specifically described with reference to FIGS. 1 (b) to 4 (FIG. 4).
  • the heating unit 10, the heating unit 20a, and the heating unit 20b of the embodiment basically have the same configuration. Therefore, in the following description, the configuration of the heating unit 10 will be described on behalf of these.
  • the heating unit 10 of the embodiment includes a heating coil C which is an induction heating body arranged in the main body portion 2 below the top plate 3 and the heating. It is configured to include a power supply unit 9 that supplies a high-frequency current to the coil C, and a ferrite F that is arranged in a main body 2 below the heating coil C.
  • a high-frequency current having a size corresponding to the thermal power adjustment operation in the operation panel 7, the thermal power adjustment dial 8a, and the thermal power adjustment dial 8b is generated from the power supply unit 9 by the heating coil. It is supplied to C.
  • the frequency of the high frequency current supplied at this time is, for example, 20 kHz to 100 kHz.
  • the material of the pot or the like placed on the top plate 3 is determined by detecting, for example, the generation state of the induced magnetic field when the pot or the like is placed in the power supply unit 9. To. Then, it is preferable to switch the frequency of the high frequency current based on the determination result.
  • the power supply unit 9 corresponds to an example of the "power supply means" of the present invention.
  • the heating coil C of the embodiment is configured by laminating coils, each of which is formed by winding a copper thin film wire, in multiple layers with an insulating layer interposed therebetween.
  • laminating coils each of which is formed by winding a copper thin film wire, in multiple layers with an insulating layer interposed therebetween.
  • the ferrite F arranged below the heating coil C is formed of, for example, a material having a high magnetic permeability, and is formed on the heating coil C and the heating portions 20a and the heating portions 20b arranged adjacent to each other, respectively. It has a function of increasing the eddy current formed in the pot or the like placed on the top plate 3 by magnetically coupling with a corresponding heating coil (not shown).
  • FIGS. 2 to 4 are plan views showing the structure of the heating coil of the embodiment, and is a case where the heating coil C is viewed from the top plate 3 side in the cooker 1 (see FIG. 1 (b)). It is a plan view.
  • the heating coil C of the embodiment includes a coil C1 configured by winding one, for example, a copper thin film wire L1 and a coil C2 (not shown in FIG. 2). It is configured by being laminated in a direction perpendicular to the paper surface of FIG. 2 via a heat-resistant insulating layer BF. At this time, a well-known heat-resistant insulating material can be used as the material of the insulating layer BF. Further, the winding center of the copper thin film wire L1 constituting the coil C1 and the winding center of the copper thin film wire constituting the coil C2, which will be described later, are the same or substantially the same as each other. In the above configuration, the copper thin film wire L1 corresponds to an example of the "outer inner winding line" of the present invention.
  • the coil C1 of the embodiment is composed of a copper thin film wire L1 wound in the same layer of the heating coil C (the surface of the insulating layer BF exemplified in FIG. 2).
  • An external connection terminal O1 for connecting the copper thin film wire L1 (in other words, the coil C1) to the power supply unit 9 is provided in a part of the outermost peripheral portion (the uppermost portion in the case of the coil C1 shown in FIG. 2). is doing.
  • the coil C1 is configured such that the copper thin film wire L1 is wound around the center of the heating portion 10 in a circular spiral shape eight and a half turns (8.5 turns) counterclockwise from the outermost peripheral portion thereof in FIG.
  • the outer peripheral end portion (the uppermost portion in the case of FIG.
  • the overall shape of the coil C1 is circular.
  • the inner peripheral end portion of the copper thin film wire L1 (the central end portion of the coil C1 in the case of FIG. 2) is formed on the back surface of the insulating layer BF by the via V penetrating the insulating layer BF. It is connected to the copper thin film wire that constitutes.
  • the peripheral coil C1out which is a part of the coil C1 is wound around the peripheral portion in the plan view of the heating portion 10
  • the central coil C1in which is another part of the coil C1 is wound. Is wound around the central portion of the heating portion 10 in a plan view.
  • the copper thin film wire L1 has the same width and the same thickness over the entire circumference of the coil C1. Further, the switching from the outer peripheral side to the inner peripheral side of the winding of the copper thin film wire L1 as the coil C1 (that is, the transition of the winding) is provided at the "12 o'clock" position when the entire coil C1 is regarded as a clock. Each winding is performed once in the winding transition region CR1.
  • FIG. 3 is a plan view showing only the coil C2 taken out.
  • the coil C2 laminated on the coil C1 with the insulating layer BF sandwiched between them is configured by winding one, for example, a copper thin film wire L2.
  • the copper thin film wire L2 corresponds to an example of the "inner / outer winding line" of the present invention.
  • the center of winding of the copper thin film wire L2 constituting the coil C2 and the center of winding of the copper thin film wire L1 constituting the coil C1 are mutually identical or substantially the same.
  • the overall shape of the coil C2 is the same circular shape as the overall shape of the coil C1.
  • the coil C2 of the embodiment is composed of the copper thin film wire L2 wound in the same layer of the heating coil C (the back surface of the insulating layer BF exemplified in FIG. 2).
  • An external connection terminal O2 for connecting the copper thin film wire L2 (in other words, the coil C2) to the power supply unit 9 is provided on a part of the outermost peripheral portion (the uppermost portion in the case of the coil C2 shown in FIG. 3).
  • the copper thin film wire L2 is wound around the center of the heating portion 10 in a circular spiral shape in a counterclockwise direction eight and a half turns (8.5 turns) from the innermost peripheral portion thereof in FIG.
  • the outer peripheral end portion (the uppermost portion in the case of FIG.
  • the overall shape of the coil C2 is also circular.
  • the inner peripheral end portion of the copper thin film wire L2 (in the case shown in FIG. 3, the central end portion of the coil C2) is connected to the copper thin film wire L1 of the coil C1 by the via V.
  • the peripheral coil C2out which is a part of the coil C2 is wound around the peripheral portion in the plan view of the heating portion 10
  • the central coil C2in which is another part of the coil C2, is wound. Is wound around the central portion of the heating portion 10 in a plan view.
  • the copper thin film wire L2 has the same width and the same thickness over the entire circumference of the coil C2. Further, the transition of the winding of the copper thin film wire L2 as the coil C2 from the inner peripheral side to the outer peripheral side is the winding provided at the "12 o'clock" position when the entire coil C2 is regarded as a clock. Each winding is performed once in the transition region CR2.
  • FIG. 4 is a plan view showing the overlapping state of the coil C1 and the coil C2.
  • the coil C1 is a solid line and is laminated immediately below the coil C1 via an insulating layer BF (not shown in FIG. 4).
  • the existing coils C2 are shown by broken lines.
  • a solid line in FIG. 4 it is composed of a copper thin film wire L1 wound from the outer circumference to the inner circumference, and at the innermost peripheral portion thereof, a copper thin film wire L2 and a copper thin film wire L1 constituting the coil C2 are formed.
  • the coil C1 connected by the via V one pitch in the winding of the copper thin film wire L1 (that is, for heating of the adjacent copper thin film wires L1 in each winding only in the winding transition region CR1).
  • the radial distance of the coil C the same shall apply hereinafter), so that the winding position shifts toward the inner circumference side (that is, the winding shifts to the inner circumference side), and the copper thin film wire L1 counterclockwise. It is wound around.
  • FIG. 4 shows.
  • the winding position of the copper thin film wire L2 in the winding is shifted to the outer peripheral side by one pitch (that is, the winding shifts to the outer peripheral side).
  • the copper thin film wire L2 is wound counterclockwise (that is, in the same direction as the copper thin film wire L1 in the coil C1).
  • the uppermost portion of the coil C1 in FIG. 4 was connected to the external connection terminal O1 having a shape protruding outward
  • the uppermost portion of the coil C2 in FIG. 4 was connected to the external connection terminal O2 having a shape protruding outward. It is said to be in shape.
  • the coil C1 and the coil C2 having the above shapes are laminated as shown in FIG. 4, the position of the copper thin film wire L1 and the position of the copper thin film wire L2 as seen from the center of the heating coil C are , Except for the winding transition region CR1 and the winding transition region CR2 in which each winding transitions, they are the same. Therefore, in the heating coil C, the coil C1 and the coil C2 are in an insulating layer in a state where the portion of the coil C1 excluding the winding transition region CR1 and the portion of the coil C2 excluding the winding transition region CR2 overlap. They are laminated with the BF in between.
  • the coil C2 is connected at the innermost peripheral portion of the coil C1 so as to have the same winding direction with respect to the counterclockwise winding from the outermost peripheral portion (external connection terminal O1) to the innermost peripheral portion.
  • the coil C2 is wound from the innermost peripheral portion to the outermost peripheral portion while maintaining the winding direction.
  • FIGS. 5 to 9 are plan views showing the structure of the heating coil of the conventional example
  • FIG. 8 is a diagram showing the relationship between the frequency and the inductance as an effect of the structure of the heating coil C of the embodiment
  • FIG. 9 is a diagram showing the relationship between the frequency and the Q value as the effect.
  • FIGS. 5 to 7 are plan views showing the structure of the heating coil of the conventional example when viewed from the same viewpoint as the heating coil C of the embodiment (see FIG. 1).
  • the same members as those of the heating coil C of the embodiment are designated by the same member numbers, and detailed description thereof will be omitted.
  • the heating coil X of the conventional example includes a coil X1 configured by winding a single copper thin film wire XL1 and a coil X2 (not shown in FIG. 5). It is configured by being laminated in a direction perpendicular to the paper surface of FIG. 5 via an insulating layer BF similar to the heating coil C of the embodiment.
  • the winding center of the copper thin film wire XL1 constituting the coil X1 and the winding center of the copper thin film wire constituting the coil X2, which will be described later, are the same or substantially the same as each other.
  • the coil X1 is composed of a copper thin film wire XL1 wound in the same layer of the heating coil X (the surface of the insulating layer BF exemplified in FIG. 5).
  • An external connection terminal O1 for connecting the copper thin film wire XL1 (in other words, the coil X1) to a conventional power supply unit (not shown) is provided on a part of the outer peripheral portion (the uppermost portion in the case of the coil X1 shown in FIG. 5).
  • the copper thin film wire XL1 makes eight and a half rotations (8.5 turns) in parallel in the counterclockwise direction from the outermost peripheral portion in FIG.
  • the heating portion (not shown) provided with the heating coil X as the center. ) It is configured to be wound in a circular spiral shape, and the outer peripheral end portion (the uppermost portion in the case of FIG. 5) of the copper thin film wire XL1 is connected to the external connection terminal O1. As a result, the overall shape of the coil X1 is circular. Further, the inner peripheral end portion of the copper thin film wire XL1 (the central end portion of the coil X1 in the case of FIG. 5) is formed on the back surface of the insulating layer BF by the via V penetrating the insulating layer BF. It is connected to the copper thin film wire that constitutes.
  • the peripheral coil X1out which is a part of the coil X1
  • the central coil X1in which is another part of the coil X1
  • It is wound around the center of the coil X1 in a plan view.
  • the copper thin film wire XL1 has the same width and the same thickness over the entire circumference of the coil X1 and the same width and the same thickness as the copper thin film wire L1 of the coil C1. Further, the transition of the winding of the copper thin film wire XL1 as the coil X1 from the outer peripheral side to the inner peripheral side is configured to gradually transition to the inner peripheral side over the entire winding of the coil X1. There is.
  • FIG. 6 is a plan view showing only the coil X2 taken out.
  • the coil X2 laminated on the coil X1 with the insulating layer BF sandwiched between them is configured by winding one copper thin film wire XL2.
  • the center of winding of the copper thin film wire XL2 constituting the coil X2 and the center of winding of the copper thin film wire XL1 constituting the coil X1 are the same or substantially the same as described above.
  • the overall shape of the coil X2 is the same circular shape as the overall shape of the coil X1.
  • the coil X2 is composed of the copper thin film wire XL2 wound in the same layer of the heating coil X (the back surface of the insulating layer BF exemplified in FIG. 5).
  • An external connection terminal O2 for connecting the copper thin film wire XL2 (in other words, the coil X2) to the power supply unit (not shown above) is provided in a part of the outermost peripheral portion (the uppermost portion in the case of the coil X2 shown in FIG. 6). is doing.
  • the copper thin film wire XL2 has a circular spiral shape of eight and a half rotations (8.5 turns) in parallel in the counterclockwise direction from the innermost peripheral portion in FIG.
  • the outer peripheral end portion (the uppermost portion in the case of FIG. 6) of the copper thin film wire XL2 is connected to the external connection terminal O2.
  • the overall shape of the coil X2 is circular.
  • the inner peripheral end portion of the copper thin film wire XL2 (in the case shown in FIG. 6, the central end portion of the coil X2) is connected to the copper thin film wire XL1 of the coil X1 by the via V.
  • the peripheral coil X2out which is a part of the coil X2
  • the central coil X2in which is another part of the coil X2 is wound. It is wound around the center of the coil X2 in a plan view.
  • the copper thin film wire XL2 has the same width and the same thickness over the entire circumference of the coil X2 and the same width and the same thickness as the copper thin film wire L2 of the coil C2. Further, the winding transition of the copper thin film wire XL2 as the coil X2 from the inner peripheral side to the outer peripheral side is configured to gradually transition to the outer peripheral side over the entire winding of the coil X2. ..
  • FIG. 7 is a plan view showing the overlapping state of the coil X1 and the coil X2, in which the coil X1 is a solid line and is laminated immediately below the coil X1 via an insulating layer BF (not shown in FIG. 7).
  • the existing coils X2 are shown by broken lines.
  • FIG. 7 it is composed of a copper thin film wire XL1 wound from the outer circumference to the inner circumference, and at the innermost peripheral portion thereof, a copper thin film wire XL2 and a copper thin film wire XL1 constituting the coil X2.
  • the winding gradually shifts to the inner circumference side by one pitch over the entire circumference of the winding (that is, the winding shifts to the inner circumference side).
  • the copper thin film wire XL1 is wound counterclockwise.
  • FIG. 7 As shown by the broken line, the copper thin film wire gradually shifts by one pitch over the entire circumference of the winding so that the winding shifts to the outer peripheral side (that is, the winding shifts to the outer peripheral side).
  • XL2 is wound counterclockwise (that is, in the same direction as the copper thin film wire XL1 in the coil X1). Then, the uppermost portion of the coil X1 in FIG.
  • the coil X1 and the coil X2 having the above shapes are laminated as shown in FIG. 7, the position of the copper thin film wire XL1 and the position of the copper thin film wire XL2 as seen from the center of the heating coil X are , As shown in FIG. That is, unlike the coil C of the embodiment, most of the copper thin film wire XL1 and most of the copper thin film wire XL2 do not overlap when viewed from the center of the heating coil X (see FIGS. 4 and 7). Therefore, as the heating coil X, the coil X1 and the coil X2 are laminated so as to sandwich the insulating layer BF in a state where the coil X1 and the coil X2 do not overlap.
  • the coil X2 is connected at the innermost peripheral portion of the coil X1 so as to have the same winding direction with respect to the counterclockwise winding from the outermost peripheral portion (external connection terminal O1) to the innermost peripheral portion.
  • the coil X2 is wound from the innermost peripheral portion to the outermost peripheral portion while maintaining the winding direction. Due to this structure, as the heating coil X of the conventional example, a current flows counterclockwise from the outermost peripheral portion to the innermost peripheral portion in the coil X1, and the current flows from the innermost peripheral portion to the outermost peripheral portion in the coil X2. It flows in the same counterclockwise direction toward the part.
  • the other specifications of the heating coil C of the embodiment and the heating coil X of the conventional example used in the experiment of the embodiment are as follows.
  • the coil C1 is composed of the winding of the copper thin film wire L1 and the copper thin film wire L2 is wound. Further, the coil C2 laminated on the coil C1 with the insulating layer BF interposed therebetween is provided, and the position seen from the center of the heating coil C of each winding of the copper thin film wire L1 and the center of each winding of the copper thin film wire L2. The position seen from the above is the same in the plan view of the heating coil C except for the winding transition region CR1 and the winding transition region CR2 (see FIG. 4).
  • the winding transition region CR1 and the winding transition region CR2 are formed at positions along one radius in the heating coil C (see FIGS. 2 to 4). Therefore, by increasing the winding portion of the copper thin film wire L1 and the winding portion of the copper thin film wire L2 whose positions seen from the center of the heating coil C match in a plan view, the transmission efficiency is further improved. It is possible to further prevent the operating temperature from rising.
  • the overall shape of the coil C1 including the copper thin film wire L1 and the copper thin film wire L2 in a plan view is circular, it can be efficiently covered by being adapted to the general plan view shape of a heated body such as a pot.
  • the heated body can be heated.
  • peripheral coil C1out and the peripheral coil C2out are wound around the peripheral portion in the plan view of the heating portion 10
  • the central coil C1in and the central coil C2in are wound around the central portion in the plan view of the heating portion 10. Therefore, the heated body can be efficiently heated by the copper thin film wire L1 and the copper thin film wire L2 on the peripheral side and the center side.
  • the present invention can be used in the field of induction heating type cookers, and is particularly applicable to the field of induction heating type cookers for home use, for example, where weight reduction and thinning are required. A remarkable effect can be obtained.
  • Cooker 2 Main body 3 Top plate (top plate) 4 Cooking grill 5 Intake window 6a, 6b Exhaust window 7 Operation panel 8a, 8b Thermal power adjustment dial 9 Power supply unit 10, 20a, 20b Heating unit C, X Heating coil F Ferrite V Via L1, L2, XL1, XL2 Copper Thin film wire C1, C2, X1, X2 coil BF Insulation layer O1, O2 External connection terminal C1out, C2out, X1out, X2out Peripheral coil C1in, C2in, X1in, X2in Central coil CR1, CR2 Winding transition region

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  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

L'invention concerne une bobine qui permet d'obtenir une légèreté et une minceur supplémentaires, d'améliorer l'efficacité de transmission en tant que dispositif de cuisson IH et d'empêcher l'augmentation de la température de fonctionnement. La présente invention est une résistance chauffante (C), utilisée pour le chauffage par chauffage par induction, la résistance chauffante comprenant : une bobine (C1) formée par enroulement d'un fil de film mince de cuivre (L1) depuis le côté périphérique externe vers le côté périphérique interne de La résistance chauffante (C); et une bobine formée par enroulement d'un fil de film mince de cuivre à partir du côté périphérique interne vers le côté périphérique externe et stratifié sur la bobine (C1) de manière à prendre en sandwich une couche isolante (BF). La position des enroulements du fil de film mince de cuivre (L1) telle qu'observée depuis le centre de la résistance chauffante (C) et la position des enroulements de la bobine stratifiée sur la bobine (C1) avec la couche isolante (BF) interposée entre celles-ci, vue de ce centre, correspondent dans une vue en plan.
PCT/JP2021/032540 2020-09-04 2021-09-03 Bobine et dispositif de chauffage WO2022050398A1 (fr)

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JP2020-149120 2020-09-04
JP2020149120A JP2022043697A (ja) 2020-09-04 2020-09-04 コイル及び加熱装置

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001297869A (ja) * 2000-04-13 2001-10-26 Matsushita Electric Ind Co Ltd 誘導加熱装置用加熱コイル
CN206018744U (zh) * 2016-08-30 2017-03-15 浙江绍兴苏泊尔生活电器有限公司 电磁炉
JP2020512657A (ja) * 2017-03-31 2020-04-23 ブリティッシュ アメリカン タバコ （インヴェストメンツ） リミテッドＢｒｉｔｉｓｈ Ａｍｅｒｉｃａｎ Ｔｏｂａｃｃｏ （Ｉｎｖｅｓｔｍｅｎｔｓ） Ｌｉｍｉｔｅｄ 誘導コイル構成体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001297869A (ja) * 2000-04-13 2001-10-26 Matsushita Electric Ind Co Ltd 誘導加熱装置用加熱コイル
CN206018744U (zh) * 2016-08-30 2017-03-15 浙江绍兴苏泊尔生活电器有限公司 电磁炉
JP2020512657A (ja) * 2017-03-31 2020-04-23 ブリティッシュ アメリカン タバコ （インヴェストメンツ） リミテッドＢｒｉｔｉｓｈ Ａｍｅｒｉｃａｎ Ｔｏｂａｃｃｏ （Ｉｎｖｅｓｔｍｅｎｔｓ） Ｌｉｍｉｔｅｄ 誘導コイル構成体

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