WO2012105235A1 - Dispositif de cuisson à chauffage par induction - Google Patents

Dispositif de cuisson à chauffage par induction Download PDF

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Publication number
WO2012105235A1
WO2012105235A1 PCT/JP2012/000618 JP2012000618W WO2012105235A1 WO 2012105235 A1 WO2012105235 A1 WO 2012105235A1 JP 2012000618 W JP2012000618 W JP 2012000618W WO 2012105235 A1 WO2012105235 A1 WO 2012105235A1
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WO
WIPO (PCT)
Prior art keywords
heating coil
support plate
coil base
base support
holding
Prior art date
Application number
PCT/JP2012/000618
Other languages
English (en)
Japanese (ja)
Inventor
和一 岡田
小川　賢治
浩幸 勝部
日下　貴晶
大平 小栗
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to JP2012555750A priority Critical patent/JPWO2012105235A1/ja
Publication of WO2012105235A1 publication Critical patent/WO2012105235A1/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
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special 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
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/02—Induction heating
    • H05B2206/022—Special supports for the induction coils
    • 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 relates to an induction heating cooker used by being incorporated in a kitchen of a general household.
  • a plurality of legs 4 are formed integrally with a support 3 that supports the lower surface of the heating coil 2 in the heating coil unit 1.
  • the substrate holding body 6 that supports the inverter substrate 5 that drives the heating coil 2 is provided with a leg support boss 8 that is inserted inside the spring 7, and the leg 4 is supported via the spring 7, thereby heating the coil. 2 (see, for example, Patent Document 1).
  • the leg support boss 8 positions the heating coil unit 1. Therefore, when a lateral (horizontal) impact is applied, such as when the induction heating cooker body is packed and transported, the lateral impact due to the weight of the heating coil unit 1 is applied via the spring 7 to the leg support boss 8. Act on.
  • the base strength of the leg supporting boss 8 has a problem that a strength design that can withstand such a bending moment is required.
  • This invention solves the said conventional subject, and it aims at providing the induction heating cooking appliance which can obtain the structure which can make small the required intensity
  • an induction heating cooker includes a top plate on which a cooking utensil such as a pan is placed on an upper surface of a main body, and a substantially box-shaped outer shell located below the top plate. And a heating coil unit disposed inside the outer case, wherein the heating coil unit fixes and supports the heating coil, a heating coil base on which the heating coil is placed and held, and the heating coil base.
  • a holding base having an engaging portion that is inserted in a vertical direction with respect to the through hole formed in the edge portion, and the holding base is fixed to the side surface of the outer shell. , Vertical movement of the through holes to the engagement portion is allowed by the inserted condition, the heating coil unit is intended to be positionable in the horizontal direction vertically moved.
  • the holding base having the engaging portion inserted in the vertical direction with respect to the through hole formed in the end portion of the coil base support plate or the heating coil base of the heating coil unit is provided on the side surface of the outer shell. Since it is fixed, the heating coil unit can be positioned in the horizontal direction so as to be movable in the vertical direction. Furthermore, the distance between the coil base support plate or the through hole of the heating coil base and the fixing position of the holding table to the outer side surface can be reduced. Therefore, the bending moment acting on the holding table is reduced, the required strength of the holding table can be reduced, and a simple and small component can be obtained.
  • Sectional drawing of the induction heating cooking appliance in Embodiment 5 of this invention Sectional drawing of the induction heating cooking appliance in Embodiment 6 of this invention
  • Sectional drawing of the induction heating cooking appliance in Embodiment 6 of this invention Sectional drawing of the induction heating cooking appliance in Embodiment 6 of this invention
  • Sectional drawing of the induction heating cooking appliance in Embodiment 6 of this invention Sectional view of a conventional induction heating cooker
  • the 1st invention is an induction heating cooking appliance,
  • the top plate which mounts to-be-heated cooking utensils, such as a pan, on the upper surface of a main body,
  • the substantially box-shaped outer shell located under the top plate, The inside of the case of the outer shell
  • the heating coil unit includes a heating coil, a heating coil base for mounting and holding the heating coil, and a coil base support plate for fixing and supporting the heating coil base.
  • an elastic body that supports the coil base support plate in the vertical direction so that the weight of the heating coil unit acts on the bottom surface of the outer shell, and the coil base support plate or the edge portion of the heating coil base.
  • the distance between the fixed portion of the holding base to the outer shell and the through hole formed in the edge portion of the coil base support plate or the heating coil base can be reduced, so that the bending moment acting on the holding base is reduced.
  • the required strength of the holding base is reduced, and simple and small parts can be obtained.
  • the engaging portion of the holding base has a polygonal cross-sectional shape, and the inner peripheral surface of the through hole of the coil base support plate or the heating coil base and the A gap that does not contact each other is provided between the outer peripheral surface of the engaging portion.
  • the engaging portion of the holding base has a cross-sectional shape longer in one direction than one direction in the horizontal direction, and the coil base support plate or the heating coil base Between the inner peripheral surface of the through-hole and the outer peripheral surface of the engaging portion, a gap that does not contact each other is provided.
  • a plurality of heating coil units are arranged in the main body, and the holding base fixed to the outer shell is at least one for one heating coil unit.
  • An engagement member that engages adjacent heating coil units and restricts relative movement in the horizontal direction is disposed between the adjacent heating coil units, and the holding base and the engagement member Thus, the plurality of heating coil units are positioned in the horizontal direction.
  • a plurality of heating coil units can be positioned by arranging at least one holding base for one heating coil unit in the outer shell.
  • the heating coil unit can be positioned.
  • the holding member fixed to the outer shell and the engagement member disposed between the adjacent heating coil units are formed of an electrically insulating material.
  • the fine contact (intermittent contact state or slight contact state) between the heating coil unit and the outer shell can be eliminated, and the electrical noise environment from the heating coil unit to the outer shell can be kept constant. can do.
  • the heating coil unit and the outer shell are connected with a conductor whose connection position, length and thickness are determined, or when a part of the noise filter circuit of the electric circuit unit is connected to the outer shell, etc.
  • the static noise environmental conditions become constant, the electric noise performance such as the noise terminal voltage of the power cord is improved, and the variation can be reduced.
  • a sixth aspect of the present invention is the method according to any one of the first to fifth aspects, wherein the holding table or the heating coil base is formed of a resin or a rubber material.
  • the heating coil base or the holding table can reduce the vibration of the heating coil unit that occurs when the heated object such as a pan is heated by the heating coil unit, and the vibration of the outer shell and the top plate can be suppressed.
  • the engaging portion of the holding base is inserted into the through hole and extends in the vertical direction, and has a tip portion that is more than a root portion.
  • An inclined surface is formed so as to be thin.
  • the assembly performance can be improved when the coil unit is assembled, and the gap between the through hole and the engaging claw can be reduced after the top plate is set, so that the position of the coil unit can be more accurately set. I can decide.
  • a lower surface of the coil base support plate has a flat surface, and a plurality of the elastic bodies are provided on the flat surface. The weight of the heating coil and the heating coil base is supported by the lower surface of the coil base support plate via the elastic body.
  • the lower surface side of the heating coil unit does not have a leg for receiving and positioning the elastic body, and the shape protruding downward from the coil base support plate can be eliminated, so that the heating coil unit can be thinned.
  • the coil base support plate is disposed on a flat portion for fixing and supporting the heating coil base, and an edge portion of the flat portion.
  • a side surface holding portion, the through hole is formed in the flat portion of the coil base support plate, and the holding base includes a side surface holding portion having a contact surface parallel to the side surface portion of the coil base support plate.
  • a gap that does not contact each other is formed between the side surface portion and the contact surface when the planar portion of the coil base supporting plate is in a horizontal state, and the planar portion of the coil base supporting plate is In the state inclined with respect to the horizontal direction, the side surface portion comes into contact with the contact surface, and the inclination of the flat surface portion is restricted.
  • a plurality of heating coil units are disposed in the main body, and the coil base support plate includes a flat portion for fixing and supporting the heating coil base, and the flat portion.
  • a side surface portion disposed at an edge portion, and the through hole is formed in the flat portion of the coil base support plate of at least one of the plurality of heating coil units, and the holding
  • the engaging portion of the base is inserted, and the side portions of the adjacent heating coil base support plates are engaged with each of the side portions while being separated from each other, so that the adjacent heating coil units are horizontally relative to each other.
  • An engagement member for restricting movement is further provided, and the engagement member is made of an electrically insulating material.
  • a buffer member is disposed between the lower surface of the top plate and the engaging member.
  • a plurality of heating coil units are disposed in the main body, and the coil base support plate is configured to fix and support the heating coil base, and A side surface portion disposed at an edge portion, and the through hole is formed in the flat portion of the coil base support plate of at least one of the plurality of heating coil units, and the holding A spacer disposed between the side portions so that the engaging portions of the base are inserted and the side portions of the adjacent heating coil base support plates are separated from each other to prevent mutual contact;
  • the spacer is made of an electrically insulating material.
  • This can suppress contact between adjacent heating coil base support plates and further improve the positioning accuracy of the heating coil unit.
  • the spacer is formed integrally with the heating coil base.
  • a fourteenth invention is the twelfth invention, comprising a control unit that is located below the heating coil unit and that supplies a high-frequency current to the heating coil unit, and a cooling fan that supplies cooling air to the control unit.
  • the control unit includes a control circuit having a switching element, and a duct that covers the control circuit and guides cooling air from the cooling fan to promote cooling of the switching element. It has a wall arrange
  • FIG. 1 is an external perspective view of an induction heating cooker according to Embodiment 1 of the present invention
  • FIG. 2 is a perspective view with the top plate of the induction heating cooker according to Embodiment 1 of the present invention removed
  • FIG. 3 is the present invention
  • FIG. 4 is a perspective view in which the top plate unit and the heating coil unit of the induction heating cooker in Embodiment 1 are removed, and FIG. 4 shows the relationship between the coil base support plate and the holding base of the induction heating cooker in Embodiment 1 of the present invention.
  • FIG. 5 is a perspective view of the holding table for the induction heating cooker according to the first embodiment of the present invention
  • FIG. 6 is a coil base support plate and the holding table for the induction heating cooker according to the first embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of the elastic body contact portion of the induction heating cooker in Embodiment 1 of the present invention, and
  • FIG. 8 is a top plate of the induction heating cooker in Embodiment 1 of the present invention. Remove unit It shows a perspective view.
  • the main body 21 of the induction heating cooker is used by being incorporated into a top plate opening hole of a kitchen or the like, and the upper surface of the main body 21 is around the top plate 22 made of crystallized glass. It is covered with a top plate unit 24 surrounded by a top plate holding frame 23 made of stainless steel.
  • the top plate 22 is printed so that the areas of the heating units 25a, 25b, 25c, and 25d can be visually recognized.
  • Heating coil units 26a, 26b, 26c, and 26d constituting induction heating means are arranged inside the main body corresponding to the heating units 25a, 25b, 25c, and 25d.
  • circuit units 27a and 27b that supply high-frequency power to the heating coil units 26a, 26b, 26c, and 26d, and a cooling fan that blows cooling air to the circuit units 27a and 27b 28a and 28b.
  • the circuit unit 27a and the cooling fan 28a are fixed to a substrate holder 29a that supports an elastic body (coil spring) described later, thereby forming a circuit module 30a.
  • the circuit unit 27b and the cooling fan 28b are fixed to the substrate holding base 29b to form a circuit module 30b.
  • the heating coil units 26a and 26b are electrically connected to the circuit module 30a, and the heating coil units 26c and 26d are electrically connected to the circuit module 30b to perform electrical operation.
  • the bottom plate of the outer shell 31 below the cooling fans 28a and 28b is provided with an inlet (not shown) leading to the cooling fans 28a and 28b, and an exhaust port 33 is disposed on the front surface of the main shell 31.
  • the heating coil 35d is placed and held on the heating coil base 34d, and the heating coil base 34d is fixedly supported on the coil base support plate 36d.
  • the heating coil units 26a, 26b, and 26c have the same configuration.
  • the coil spring 38 which is an elastic body, is held so that the upper end side is exposed to a plurality of spring fixing bases 37 (elastic body support portion: see FIG. 3) arranged and fixed to the substrate holding base 29b or the outer shell 31.
  • spring fixing bases 37 elastic body support portion: see FIG. 3
  • a holding base 39 for performing horizontal positioning is fixed in a state where the heating coil unit 26 d can be moved in the vertical direction (vertical direction).
  • FIG. 5 for example, press-fitting and holding.
  • a support plate hole 40 which is a through hole penetrating in the vertical direction, is formed at the edge portion of the coil base support plate 36d.
  • the holding table 39 has an engaging claw 42 (engaging portion) that protrudes upward, and the engaging claw 42 of the holding table 39 is inserted into the support plate hole 40 of the coil base support plate 36d. Has been.
  • the heating coil unit 26d is positioned in the horizontal direction so as to be movable in the vertical direction.
  • a further support plate hole 40 is formed at the rear edge portion of the coil base support plate 36d, and the engaging claw 42 of the holding table 39 provided separately on the rear side surface of the outer shell 31 is used as the support plate. It is inserted through the hole 40. Further, the heating coil unit 26c disposed on the left rear side adjacent to the heating coil unit 26d is also positioned using the support plate hole 40 and the holding base 39, similarly to the heating coil unit 26d.
  • the holding base 39 is fixed to the outer peripheral left and right side surfaces of the outer shell 31, and the engaging claws 42 are inserted through the support plate holes 40. The same positioning as that of the heating coil unit 26d is performed.
  • the support plate hole 40 in which the engaging claw 42 of the holding base 39 fixed to the side surface of the outer shell 31 is provided at the edge portion of the coil base support plate 36d.
  • the heating coil unit 26d When the heating coil unit 26d tries to move in the horizontal plane, for example, when an impact occurs during the transportation of the main body 21, the distance between the support plate hole 40 and the fixing position of the holding base 39 on the side surface of the outer shell 31 (particularly in the vertical direction The smaller the distance is, the smaller the bending moment acting on the holding table 39 can be. Further, since the support plate hole 40 is movable in the vertical direction with respect to the engaging claw 42, the vertical force acting on the holding base 39 from the heating coil unit 26d is greatly reduced. With such a configuration, the stress generated in the holding table 39 can be reduced, the required strength of the holding table 39 can be reduced, and a simple and small component can be achieved. As a result, the holding table 39 can be stored in a narrow space.
  • the support plate hole 40 provided in the coil base support plate 36d due to rattling or deformation of the holding table 39 and The displacement of the engaging portion with the engaging claw 42 is reduced, and the positional accuracy of the heating coil unit 26d is increased.
  • the place where the holding table 39 is arranged is not limited by the component arrangement or shape of the circuit unit 27b below the heating coil unit 26d, the shape of the heating coil base 34d, or the like. Accordingly, the heating coil unit 26d can be fixed at any position in the empty space of the outer shell 31 and the coil base support plate 36d.
  • the lower surface of the coil base support plate 36d is formed as a flat surface, and other components are not disposed.
  • a plurality of coil springs 38 are in contact with a flat surface that is the lower surface of the coil base support plate 36 d, and this contact portion is a coil spring contact portion 41.
  • the weights of the heating coil 35d and the heating coil base 34d are supported via respective coil springs 38 on the lower surface of the coil base support plate 36d.
  • the heating coil unit 26d can be thinned, and a heating coil unit suitable for making the main body 21 thin can be provided.
  • the heating coil unit 26d can be freely arranged on the coil spring contact portion 41 of the coil base support plate 36d that receives the weight of the heating coil unit 26d. Therefore, the position of the coil spring contact portion 41 can be arranged without being affected by the arrangement of the constituent members on the upper surface side of the coil base support plate 36d, and the degree of freedom in design can be increased.
  • the cross-sectional shape of the engaging claw 42 that is the engaging portion of the holding base 39 is a rectangular (quadrangle) shape that is one shape of a polygon (polygon). Further, a gap is provided between the inner peripheral surface of the support plate hole 40 of the coil base support plate 36d and the outer peripheral surface of the engaging claw 42 of the holding base 39 so as not to contact with each other or to be caught.
  • the horizontal position of the heating coil unit 26d with respect to the outer shell 31 is held by inserting the engaging claws 42 of the holding base 39 into the support plate hole 40 of the coil base support plate 36d.
  • the cross-sectional shape of the engagement claw 42 is rectangular, and the shape of the support plate hole 40 of the coil base support plate 36d is such that the engagement claw 42 is not in contact with the outer peripheral surface of the engagement claw 42 or is not caught. It is the shape which provided the clearance gap between them.
  • each of the heating coil units 26a, 26b, 26c, and 26d has two or more engaging claws 42 and support plate holes 40, the positioning accuracy that also serves to prevent the heating coil unit 26d from rotating can be further increased.
  • the cross-sectional shape of the engaging claw 42 of the holding base 39 is not limited to a rectangle, but may be any shape other than a circle, for example, a polygon (polygon) such as a triangle or a pentagon. If the cross-sectional shape of the engaging claw 42 has a large aspect ratio, that is, a cross-sectional shape that is longer in one direction than the one direction in the horizontal direction, the engagement claw 42 is provided between the engaging claw 42 and the support plate hole 40. Even in the case where gaps that do not contact each other are provided, positioning accuracy with respect to rattling is improved. Moreover, the effect of preventing the rotation of the heating coil unit 26d can be enhanced by adopting such a cross-sectional shape having a large aspect ratio.
  • the heating coil unit 26d disposed mainly on the right rear side has been described, but the other heating coil units 26a to 26c have the same configuration as the heating coil unit 26d.
  • a plurality of heating coil units 26a to 26d are arranged in the main body 21, and the holding base 39 fixed to the side surface of the outer shell 31 is arranged at least one place for each of the heating coil units 26a to 26d. .
  • the left front heating coil unit 26 a is engaged with one holding base 39 disposed on the left side surface of the outer shell 31, and the right front heating coil unit 26 b is disposed on the right side surface of the outer shell 31.
  • the left rear heating coil unit 26c is engaged with two holding bases 39 arranged on the left rear side surface of the outer shell 31, and the right rear heating coil unit 26d is It engages with two holding bases 39 arranged on the left rear side of 31.
  • a first engagement member 43 is provided which is engaged with the coil base support plates 36a and 36b whose outer periphery is raised like a flange.
  • a second engaging member 44 engaged with the four coil base support plates 36a to 36d is disposed in the central portion where the heating coil units 26a to 26d are close to each other.
  • the horizontal positioning of the plurality of heating coil units 26a to 26d is performed by the plurality of holding bases 39, the first engagement member 43, and the second engagement member 44.
  • the left rear heating coil unit 26 c is engaged with the two holding bases 39 fixed to the left rear side surface of the outer shell 31 to regulate the horizontal position.
  • the right rear heating coil unit 26d is engaged with two holding bases 39 fixed to the left rear side surface of the outer shell 31 so that the horizontal position is regulated.
  • the left front heating coil unit 26a and the right front heating coil unit 26b are respectively engaged with a holding base 39 fixed to the left side surface of the outer shell 31 so that the horizontal position relative to the outer shell 31 is restricted.
  • a holding base 39 fixed to the left side surface of the outer shell 31 so that the horizontal position relative to the outer shell 31 is restricted.
  • the positioning of the heating coil unit can be regulated. Therefore, it is only necessary to provide at least one holding table for one heating coil unit on the outer side surface, and even when it is difficult to secure a plurality of holding table spaces on the outer side surface.
  • the horizontal positioning regulation can be realized.
  • the heating coil units 26a to 26d can be positioned in the horizontal direction by such a small number of holding bases 39, the main body 21 can be thinned while effectively using the limited space on the side surface of the outer shell 31. be able to.
  • the substrate holding table 29b or the spring fixing table 37 that holds the substrate is made of a thermoplastic resin material or a thermosetting resin material that is an electrically insulating material.
  • the heating coil units 26a to 26d can be configured to be electrically separated from the outer shell 31 with an electrically insulating material, and the electrical insulation between the heating coils 35a to 35d and the coil base support plates 36a to 36d is insufficient. Even if it becomes, the electric shock with respect to the outer shell 31 can be prevented.
  • the coil base support plates 36a to 36d which are constituent members of the heating coil units 26a to 26d, are prevented from minute contact (intermittent contact state or slightly contact state) with the outer shell 31, and a coil serving as a high frequency noise source It is possible to prevent unstable noise components such as high-frequency current from leaking from the base support plates 36a to 36d to the outer shell 31. Therefore, the noise leakage performance from the heating coil units 26a to 26d can be made constant.
  • FIG. 9 is a cross-sectional view showing the engagement relationship between the heating coil unit and the holding table of the induction heating cooker according to the second embodiment of the present invention.
  • the heating coil base 34b that supports the heating coil 35b partially protrudes to the right outside of the coil base support plate 36b, and a through hole is formed in the protruding portion of the heating coil base 34b.
  • a heating coil base hole 45 is formed. While the engaging claw 42 extending upward from the holding base 39 fixed to the side surface of the outer shell 31 is inserted into the heating coil base hole 45 in the vertical direction, the heating coil unit 26b can be moved in the vertical direction, It can be positioned horizontally.
  • the heating coil base 34b and the holding table 39 are formed using a resin or a rubber material.
  • the heating coil base 34b and the holding table 39 By forming the heating coil base 34b and the holding table 39 using a resin or rubber material, vibration generated when induction heating is performed using the heating coil unit 34b is absorbed, and vibration of the top plate 22 and the outer shell 31 is reduced. can do.
  • the material of the heating coil base 34b and the holding table 39 may be a slidable metal.
  • the fixing position of the outer shell 31 of the holding base 39 may be the bottom surface. However, by using the fixing position as the side surface, the holding base 39 does not need to be large even when the height of the outer shell 31 is high, and the size is reduced. be able to. Further, as mentioned in the first embodiment, the bending moment acting on the holding table can be reduced by setting the fixed position as the side surface.
  • the holding table 39 and the heating coil base 34b can be shared even in an induction heating cooker having a different size of the outer shell 31, thereby providing a cheaper product. be able to.
  • the induction heating cooker of the second embodiment four heating coil units 34 are provided, but the induction heating cooker including one or two heating coil units can be shared. Even if the width of the outer shell 31 is different, the distance between the outer shell 31 and the heating coil unit 34b can be made constant.
  • the degree of freedom of the position of the spring fixing base 37 is increased, and the degree of freedom of arrangement of the position of the substrate and the heating coil unit 34b can be improved.
  • FIG. 10 is a cross-sectional view of the engaging portion when the coil base support plate and the holding base of the induction heating cooker according to Embodiment 3 of the present invention are set, and FIG. 11 is induction heating according to Embodiment 3 of the present invention. It is an engagement part sectional view after a coil base support plate of a cooking appliance and a top plate set of a holding stand.
  • a spacer 46 for keeping the distance between the top plate 22 and the heating coil 35b constant is placed on the heating coil base 34b of the heating coil unit 26b.
  • the coil spring 38 supports the weight of only the heating coil unit 26b because it is in a state before the top plate 22 is set at the time of assembly. In this assembled state, the heating coil unit 26b is raised upward by the coil spring 38 as compared to the state after the top plate 22 is set as shown in FIG.
  • the engaging claw 42 of the holding base 39 extends in the extending direction, and an inclined portion 47 having an inclined surface is formed so that the tip portion (upper side portion) is thinner than the root portion. That is, the engaging claw 42 becomes thinner toward the tip (upper side), and the upper end portion 48 is thinner than the root portion 49 of the inclined portion 47.
  • the upper end portion 48 of the engaging claw 42 of the holding base 39 is inserted into the support plate hole 40 of the coil base support plate 36b and set. Therefore, the engagement pawl 42 can be easily inserted into the support plate hole 40 by setting the width of the upper end portion 48 of the engagement claw 42 to 0.5 to 0.8 times the width of the support plate hole 40, for example. Can be made. However, if the width of the upper end portion 48 is simply made too small without providing the inclined portion 47, the backlash between the engaging claw and the support plate hole is increased even after the top plate is set. The positional deviation of the heating coil unit 26b increases and problems such as vibration are likely to occur.
  • the base portion 49 of the engaging claw 42 is thickened by providing the inclined portion 47, after the top plate is set, the space between the outer peripheral surface of the base portion 49 and the inner peripheral surface of the support plate hole 40 is shown in FIG. The gap can be narrowed, and the play can be reduced.
  • FIG. 12 is a sectional view showing an engagement state between the coil base support plate and the holding base of the induction heating cooker according to the fourth embodiment of the present invention
  • FIG. 13 is an induction heating cooker according to the fourth embodiment of the present invention. It is sectional drawing which shows the engagement state of a coil base support plate and a holding stand at the time of receiving a shock by transportation or transportation.
  • the coil base support plate 36b of the heating coil unit 26b includes a flat surface portion that fixes and supports the heating coil base 34b, and a flange portion 51 that is a side surface portion extending upward in the vertical direction from the edge portion of the flat surface portion. It is comprised by.
  • a support plate hole 40 is formed in an edge portion of the flat portion of the coil base support plate 36 b, that is, a flat portion inside the flange portion 51, and the engaging claw of the holding base 39 fixed to the side surface of the outer shell 31. 42 is inserted through the support plate hole 40.
  • the holding base 39 has a contact surface parallel to the flange portion 51 of the coil base support plate 36b, and has a side surface holding portion 50 with which the flange portion 51 contacts as will be described later. Further, as shown in FIG. 12, the distance d1 between the outermost peripheral surface of the support plate hole 40 from the outer surface of the flange portion 51 and the farthest distance of the engaging claw 42 from the contact surface of the side surface holding portion 50. Each component member is formed so that d2 becomes substantially the same distance.
  • the heating coil unit 26b is placed at a position parallel to the top plate 22, and the side surface holding portion 50 and the flange portion 51 are slightly separated from each other.
  • the heating coil unit 26b is instantaneously inclined due to the drop of the induction heating cooker or the impact during transportation, and the side surface holding portion 50 and the flange portion 51 of the holding table 39 are in contact with each other.
  • the heating coil unit 26b When the heating coil unit 26b is momentarily tilted due to the dropping of the induction heating cooker or the impact during transportation, the flange portion 51 of the coil base support plate 36b comes into contact with the side surface holding portion 51 of the holding base 39. Further, the inclination of the heating coil unit 26b can be restricted. Therefore, it is possible to reduce the bending moment of the root portion 49 of the engaging claw 42 caused by the inclination of the heating coil unit 26b and prevent the engaging claw 42 from being damaged. Also, when the heating coil unit 26b is removed when the induction heating cooker is disassembled, the bending moment of the base portion 49 of the engaging claw 42 can be reduced by regulating the amount of inclination as shown in FIG.
  • FIG. 5 is a cross-sectional view of an induction heating cooker according to Embodiment 5 of the present invention
  • FIG. 15 is a schematic perspective view excluding the top plate of the induction heating cooker according to Embodiment 5 of the present invention
  • FIG. 17 shows a sectional view of the induction heating cooker in the fifth embodiment of the present invention.
  • the induction heating cooker is disposed below the top plate 102, a substantially box-shaped outer casing 101 constituting the main body of the induction heating cooker, a top plate 102 on which an object to be heated is placed. And four heating coil units 103a to 103d.
  • the heating coil unit 103a includes a heating coil 104a that generates a high-frequency magnetic field, a heating coil base 105a that fixes and supports the heating coil, and a heating coil base support plate 106a that places and supports the heating coil base 105a.
  • the heating coil base support plate 106a is integrally formed by a flat surface portion that fixes and supports the heating coil base 105a and a wall 107a that is a side surface portion that extends vertically upward on the outer periphery of the flat surface portion.
  • a substrate base 109 that holds a control circuit having a switching element and the like and a cooling fan 108 is provided on the bottom surface of the outer shell 101.
  • a duct 110 is attached so as to cover the control circuit, and the cooling air sent from the cooling fan 108 cools the switching elements on the control circuit while passing through the duct 110.
  • each spring fixing base 111a holds a spring 112a which is an elastic body so that the upper end side is exposed.
  • the heating coil base support plate 106 a By placing the heating coil base support plate 106 a on the three coil springs 112 a, the weight of the heating coil unit 103 a acts on the bottom surface of the outer shell 101 and is supported.
  • the other three heating coil units 103b to 103d have the same configuration as that of the heating coil unit 103a.
  • a holding table 113a On the rear side surface of the outer shell 101, a holding table 113a is press-fitted and fixed. Support plate holes 114a, which are through holes penetrating in the vertical direction, are formed at the edge portions of the planar portion on the left rear side and the right rear side of the heating coil base support plate 106a. By inserting the engaging claw of the holding base 113a into the support plate hole 114a, the horizontal position is restricted while the heating coil unit 103a can be moved only in the vertical direction.
  • the same configuration is arranged on the left side of the heating coil base support plate 106b, and the horizontal position of the heating coil unit 103b is restricted. Further, the heating coil units 103c and 103d are similarly configured to restrict the position in the horizontal direction.
  • an engaging portion 115 that is an engaging member that engages the wall 107a and the wall 107b while separating the vertical wall 107a and the wall 107b formed in the heating coil base support plates 106a and 106b adjacent to each other.
  • the engaging portion 115 has an insulating wall formed of an electrically insulating material disposed between the wall 107a and the wall 107b. Accordingly, the horizontal relative positions of the heating coil units 103a and 103b adjacent to each other are restricted, and the heating coil base support plate 106a and the heating coil base support plate 106b are not in contact with each other.
  • the holding table 113a is fixed by being press-fitted into the outer peripheral side surface of the outer shell 101, and the engaging claws of the holding table 113a are inserted into the support plate holes 114a provided at the edge portions of the outer peripheral left and right rear portions of the heating coil base support plate 106a.
  • the distance between the support plate hole 114a, which is the engaging portion, and the fixed portion of the holding table 113a to the outer shell 101 is the distance between the opening 114a and the bottom surface of the outer shell 101. Can be shorter.
  • the heating coil unit 103a When the heating coil unit 103a tries to move in the horizontal plane due to the transportation impact of the main body, the smaller the distance (particularly the vertical distance) between the support plate hole 114a and the place where the holding table 113a is fixed to the outer shell 101 is smaller.
  • the bending moment acting on the holding table 113a can be reduced. Therefore, the stress generated in the holding table 113a can be reduced, and the required strength of the holding table 113a can be reduced, so that a simple and small component can be obtained.
  • the holding stand 113a can be stored in the space on the outer side surface.
  • the heating coil unit 103a is moved in the horizontal direction by vertically inserting the engaging claws of the holding table 113a into the support plate holes 114a formed in the edge portions of the outer peripheral left and right rear portions of the heating coil base support plate 106a. Can be regulated.
  • the heating coil base support plate 106a slides on the coil spring 112a, so that no force is applied to the portion where the elastic body of the spring fixing base 111a is attached. Therefore, since the spring fixing base 111a can be reduced in size, the space near the substrate base 109 (that is, the space near the bottom surface of the outer shell 101) can be used effectively.
  • spring fixing bases 111a may be formed integrally with the substrate base 109. In this case, the cost required for manufacturing the spring fixing base 111a can be eliminated.
  • the engaging portion 115 (see FIG. 15) is viewed from the front of the induction heating cooker main body at the lower right of the heating coil base support plate 106a, the upper right of the heating coil base support plate 106b, and the heating coil base support plate 106c. It engages with all of the vertical walls 107a to 107d provided in the lower left and upper left of the heating coil base support plate 106d.
  • the structure is such that a certain distance or more is secured between each of the walls 107a to 107d, and the relative positional relationship between the heating coil units 103a to 103d can be regulated by one member. it can.
  • the impact of the engaging portion 115 colliding with the top plate 102 can be absorbed when a vertical impact load is applied. Can do. Therefore, the risk that the top plate 102 will be broken by an impact can be reduced.
  • the positioning of the heating coil unit 103a to the heating coil unit 103d is performed by the holding bases 113a to 113d and the engaging portion 115 provided on the outer side surface. Therefore, in order to position each heating coil unit as in the prior art, it is possible to eliminate the need to perform strength calculation in consideration of the bending moment acting on the spring fixing base. Therefore, the configuration of the holding base can be simplified, and the space inside the main body can be effectively utilized correspondingly.
  • the relative position relationship between the heating coil unit 103a to the heating coil unit 103d is restricted by one engaging portion, and the position in the horizontal direction is restricted by one holding stand, thereby positioning the heating coil unit in the main body.
  • the number of holding bases is increased in order to perform positioning more reliably.
  • the positional relationship between the heating coil units 103a to 103d and the engaging portion 115 can also be obtained by providing through holes in the heating coil base support plates 106a to 106d and passing through a rod-shaped member formed in the engaging portion 115. It is possible to fix.
  • the claw portion of the spacer 118a made of an insulating material is attached so as to pass through the spacer attachment hole 117a provided in the heating coil base support plate 107a.
  • the spacer 118a By causing the spacer 118a to contact the heating coil base support plate 106b, the distance between the vertical wall 107a and the vertical wall 107b is maintained at a certain level or more.
  • the heating coil unit 103a to the heating coil unit 103d can be positioned in the horizontal direction by the holding table 113a to the holding table 113d and the engaging portion 115.
  • the heating coil unit 103a to the heating coil unit 103d are arranged in the horizontal direction slightly, depending on the gap generated in the engaging portion between the holding table 113a to the holding table 113d and the support plate hole 114a to the support plate hole 114d of the heating coil base support plate. And play of rotation around the vertical axis.
  • the heating coil base support plate 106a to the heating coil base support plate 106d are brought into contact with each other by the above-described play. The possibility to do.
  • the heating coil base support plate 106a to the heating coil base support plate 106d When the heating coil base support plate 106a to the heating coil base support plate 106d come into contact with each other, the heating coil base support plate 106a to the heating coil base support plate 106d are formed of a nonmagnetic metal, and thus are electrically coupled. The electrical characteristics of the heating coil unit will change. In such a case, there is a possibility of affecting the noise resistance performance.
  • a spacer 118a is provided between the wall 107a and the wall 107b of the heating coil base support plate. Since the spacer 118a is formed of an electrically insulating material, the wall 107a and the wall 107b of the heating coil base support plate can be reliably insulated, and the noise resistance performance can be stabilized.
  • a spacer 120a may be press-fitted into the wall 107a of the heating coil base support plate 106a.
  • the spacer mounting hole is not necessary, the processing cost of the heating coil base support plate 106a can be suppressed, and an inexpensive induction heating cooker can be provided.
  • a duct vertical wall 119 may be provided in the duct 110 placed on the substrate base 109, and the duct vertical wall 119 may have a spacer function. Also in this case, the cost of the spacer can be suppressed, and an inexpensive induction heating cooker can be provided.
  • the spacer 118a is provided on the vertical wall 107a of the heating coil unit 103a.
  • the same effect can be obtained by providing the spacers 118b to 118d on the other heating coil base support plates 106b to 106d. It is done.
  • the induction heating cooker according to the present invention reduces the bending moment acting on the holding table, reduces the required strength of the holding table, and can provide simple and small parts. It is effective for the application of the cooking device.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

Selon l'invention, des unités de bobines thermiques dans un dispositif de cuisson à chauffage par induction comprennent des bases de bobines thermiques qui maintiennent des bobines thermiques qui sont montées sur celles-ci, et des plaques de support de base de bobines qui ancrent et supportent les bases de bobines thermiques. Les unités de bobines thermiques comprennent de plus : des corps élastiques qui supportent perpendiculairement les plaques de support de base de bobines, de telle sorte que le poids des unités de bobines thermiques agit sur la face inférieure d'une enceinte extérieure ; et une plateforme de maintien comportant des parties crochets qui sont passées perpendiculairement à travers des trous traversants qui sont formés sur des parties de bord d'extrémité, soit des plaques de support de base de bobines soit des bases de bobines thermiques. La plateforme de maintien est ancrée aux faces latérales de l'enceinte extérieure, un mouvement perpendiculaire des trous traversants sur les parties crochets dans l'état de passage traversant est permis, et les unités de bobines thermiques sont positionnées horizontalement et mobiles perpendiculairement.
PCT/JP2012/000618 2011-01-31 2012-01-31 Dispositif de cuisson à chauffage par induction WO2012105235A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014135425A1 (fr) * 2013-03-08 2014-09-12 Electrolux Appliances Aktiebolag Plaque de cuisson à induction
EP3048860A4 (fr) * 2013-09-19 2016-07-27 Panasonic Ip Man Co Ltd Cuisinière à induction
EP3379900A1 (fr) * 2017-03-24 2018-09-26 E.G.O. ELEKTRO-GERÄTEBAU GmbH Table de cuisson

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Publication number Priority date Publication date Assignee Title
JP2009059489A (ja) * 2007-08-30 2009-03-19 Panasonic Corp 電磁誘導加熱調理器
JP2010278027A (ja) * 2006-02-21 2010-12-09 Mitsubishi Electric Corp 誘導加熱調理器
JP2012054128A (ja) * 2010-09-02 2012-03-15 Panasonic Corp 誘導加熱調理器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010278027A (ja) * 2006-02-21 2010-12-09 Mitsubishi Electric Corp 誘導加熱調理器
JP2009059489A (ja) * 2007-08-30 2009-03-19 Panasonic Corp 電磁誘導加熱調理器
JP2012054128A (ja) * 2010-09-02 2012-03-15 Panasonic Corp 誘導加熱調理器

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014135425A1 (fr) * 2013-03-08 2014-09-12 Electrolux Appliances Aktiebolag Plaque de cuisson à induction
CN105027668A (zh) * 2013-03-08 2015-11-04 伊莱克斯家用电器股份公司 电磁感应灶
AU2014224800B2 (en) * 2013-03-08 2018-04-12 Electrolux Appliances Aktiebolag Induction hob
EP3048860A4 (fr) * 2013-09-19 2016-07-27 Panasonic Ip Man Co Ltd Cuisinière à induction
EP3379900A1 (fr) * 2017-03-24 2018-09-26 E.G.O. ELEKTRO-GERÄTEBAU GmbH Table de cuisson

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