JP3205437B2 - Induction heating cooker and method of manufacturing the induction heating coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooker in which an inner peripheral portion and an outer peripheral portion are induction-heated by a double-structure induction heating coil in which a wire is densely wound and a central portion is roughened, and the production of the induction heating coil. It is about the method.

[0002]

2. Description of the Related Art An induction heating cooker of this kind is used for the purpose of making cooking with a strong heating power in a short time and delicious. Induction heating uses a high-frequency magnetic field generated by an induction heating coil to cause a magnetic pot placed on the induction heating coil to generate heat, and is highly efficient. Since it is hard to be difficult and there is no problem of life as in a resistance heater, a large current can be supplied. However, the heat generated by the pan tends to concentrate directly on the induction heating coil having a strong magnetic field, and there is a problem of uneven heating as a large current is applied. Especially in induction heating type rice cookers, rice and water in the inner pot are heated to make rice, but it is very difficult to have convection, and the top of the induction heating coil is broken rice, and the other parts are hard. There was a problem of getting rice.

In order to solve such a problem, as shown in Japanese Patent Application Laid-Open No. 1-315979, the inner peripheral portion and the outer peripheral portion of the induction heating coil are densely formed at the center and the outer peripheral portion is raised up to the side surface. Here, the heated portion of the inner pot is dispersed. Further, as a configuration for holding the induction heating coil in the main body, a configuration in which a molded induction heating coil is sandwiched and held between main components such as a bottom portion of a protective frame and a coil base as disclosed in Japanese Patent Application Laid-Open No. 1-267683. Can be seen.

In the configuration according to the above-mentioned conventional invention, it is necessary to first form an electric wire into a coil as a procedure for manufacturing an induction heating coil. Generally, in this manufacturing method, the electric wire is wound on a reel-shaped winding jig, the inner peripheral portion of the induction heating coil is wound, and then the jig is rearranged. Take up. Thereafter, the wires are bonded together so that the wound wires do not separate and the coil shape does not collapse. The bonding is generally performed by applying a resin to the electric wire itself, flowing a large current to generate heat, melting the resin, and cooling and curing the resin. After the bonding is completed, the jig is disassembled and the formed induction heating coil is taken out. The induction heating coil formed by the above procedure is sandwiched and held between the components in the assembling process of the cooking device main body.

[0005]

In the above-mentioned conventional configuration, in the step of forming the induction heating coil, the assembly and disassembly of the jig and the like are performed.
There was a problem that it took a lot of time and effort and the cost was high.
Further, since the formed induction heating coil is divided into an inner peripheral portion and an outer peripheral portion, the shape of the coil is deformed during transportation and storage until assembly of the main body, so that there is a problem that stable heating performance cannot be obtained.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an induction heating cooker main body, a reel portion provided inside the induction heating cooker main body, and In the induction heating cooker, the inner and outer circumferences of the reel are provided with an induction heating coil with a double configuration in which the inner part and the outer part are wound tightly and the center part is coarsely wound, and a high-frequency current is passed through the induction heating coil for induction heating. The reel section has multiple guide modules.
Combining the components of a cooker, for example, induction heating coil
Between the bottom of the protective frame on the upper side of the
The inner surface of the induction heating coil is formed by winding the electric wire densely on the center side of the reel portion, and a plurality of arcuate plate-shaped spacers divided on the outer side of the inner peripheral portion are interposed. the central crude unit is formed, the outer peripheral portion of the tightly winding the induction heating coil wires on the outer side of the plurality of spacers
The heating unit is constructed by forming
Unit is taken as it is during the assembly process of the cooker body.
It is to be assembled.

The plurality of spacers are preferably joined to each other so as to be opened in the radially enlarged direction by separate bodies or joints.

In the method of manufacturing the induction heating coil, after winding a dense portion which is an inner peripheral portion of the induction heating coil around the reel portion, a plurality of arcuate plate-shaped spacers which are divided into a plurality of pieces are inserted into the center portion of the reel portion. The electric wires are densely wound around the outer periphery of the plurality of spacers to form the outer periphery of the induction heating coil.

[0009]

According to the structure of the present invention, the induction heating coil of the heating section unit has the inner peripheral portion wound outside the inner peripheral portion by densely winding the electric wire around the center in the reel portion. The central rough portion is inserted by inserting a plurality of divided arc-shaped plate spacers, and the outer peripheral portion is formed by densely winding the wire outside the plurality of spacers, without using a winding jig. A double induction heating coil is easily formed, and the reel portion is configured by combining a plurality of heating cooker components so that the reel portion is sandwiched between the bottom of the protection frame on the upper side of the induction heating coil and the lower coil base. In addition, in the induction heating cooker main body assembling process, it can be directly formed without performing an assembling operation for holding the induction heating coil or transporting and storing only the induction heating coil.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of an induction heating cooker in which an embodiment of the present invention is applied to a rice cooker, and FIG. 2 is a perspective view showing an assembled state of a reel unit of a heating unit and an induction heating coil of the induction heating cooker. a diagram, FIG. 3 is a perspective view of a spacer of the induction heating coil, FIGS. 4-7 is heated portion Uni
It is a perspective view showing a manufacturing method of the induction heating coil of the unit,
FIG. 8 is a perspective view showing a method of manufacturing an induction heating coil in which a plurality of spacers are joined at a hinge-like joint in another embodiment of the present invention, and FIG. 9 is a perspective view showing still another embodiment of the present invention. FIG. 5 is a perspective view showing a method for manufacturing an induction heating coil constituted by the spacers.

The structure will be described with reference to FIGS. 1, 2 and 4.
A protective frame 2 forming the side surface of the inner wall and a protective frame bottom 3 forming the bottom surface of the inner wall are attached to the cooking device main body 1.
It is removably stored inside. A coil base 5 is attached to the protection frame bottom 3, and the protection frame bottom 3 and the coil base 5
A reel section 6 is formed with a certain gap between them, and the induction heating coil 7 and the spacer 8 are held in this gap ,
A heating unit 17 is formed .

The coil base 5 has a hollow cylindrical portion 9 at the center.
And a flange portion 1 extending radially outward from the cylindrical portion 9
An electric wire take-out portion 11 is provided at a part of the cylindrical portion 9 by cutting the cylinder and connecting to a central hollow portion. An electric wire fixing portion 12 for fixing an end of the electric wire is provided at the flange portion 10.
, An insertion guide 13 for the spacer 8 and a window hole 14. The induction heating coil 7 is configured by winding the electric wire 15 concentrically, and has a two-part configuration of an inner peripheral portion 7-1 in which the electric wire 15 is wound eight times and an outer peripheral portion 7-2 in which the electric wire 15 is wound ten times. Has become.

Next, the structure of the spacer 8 will be described with reference to FIG. The spacer 8 includes a plurality of spacers 8-1, a spacer 8-2, and a spacer 8-3 having a shape of an arc plate.
The spacer 8-1 and the spacer 8-2 are joined at a joint 8-4, and the spacer 8-2 and the spacer 8-3 are joined at a joint 8-5. These are integrally formed of resin, and only the joints 8-4 and 8-5 are configured to have extremely narrow widths. This resin is a relatively flexible resin, and in the direction in which the diameter of the circle formed by the inner circumferences of the arcs of the spacers 8-1, 8-2, and 8-3 increases,
The joint 8-4 and the joint 8-5 are configured to bend. At the end of the spacer 8-1, a projection 16 for locking is provided.
Is provided.

Next, the manufacturing procedure will be described with reference to FIGS.

First, the protection frame bottom 3 and the coil base 5 are joined by screwing to form a reel section 6 having a fixed gap between the protection frame bottom 3 and the coil base 5. After this screwing or simultaneously with screwing, wire take-out part 1
The wire 15 is taken out from the hollow portion at the center of the coil base 5 from FIG. 1 (FIG. 4).

Next, when the reel section 6 is rotated, the cylindrical section 9 is rotated.
The core 15 winds the electric wire 15 around the reel part 6 to form the inner peripheral part 7-1 of the induction heating coil 7. When the number of turns of the inner peripheral portion 7-1 is eight, the motor is temporarily stopped, and the spacer 8
Is inserted into the insertion guide 13 of the coil base 5 (FIG. 5). Next, the spacer 8-1, the spacer 8-2, and the spacer 8-3 are opened from the joint 8-4 and the joint 8-5, and stored in the reel unit 6 (FIG. 6).

When the reel portion 6 is further rotated again, the electric wire 15 enters the reel portion 6, the spacer 8 is pushed in the direction of the inner peripheral portion 7-1, and the inner periphery of the spacer 8 and the inner peripheral portion 7-1 are eventually formed. Abut Since the spacer 8 is not further pushed into the inner peripheral portion 7-1, the spacer 8 is hereinafter referred to as the spacer 8.
When the electric wire 15 is wound around the outer peripheral portion of the electric wire as a core (FIG. 7), and the outer peripheral portion 7-2 is rotated by 10 turns, and the end of the electric wire is fixed to the electric wire fixing portion 12, the formation of the induction heating coil 7 is completed. I do. Molding is complete protective frame bottom 3, the coil base 5, heating unit Yoo induction heating coil 7 and the spacer 8 are integrated
Knit 17 may be Re assembly directly attached to the protective frame 2 by induction heating cooking device body assembly process.

In this embodiment, the spacer 8 is composed of a plurality of spacers 8-1, 8-2, and 8-3 in the shape of an arc plate.
Joint 8-4, spacer 8-
The connection between the spacer 2 and the spacer 8-3 is made at the joint 8-5, but as shown in FIG. 8, the joint 8-4 and the joint 8-
The hinge 5 may be a hinge-like joint. As shown in FIG. 9, the spacers are a plurality of spacers 8-1 and 8-2 each having a convex portion 16, and a plurality of insertion guides corresponding to them are provided in the coil base 5. The one provided with the portion 13 has the same operation and effect.

In this embodiment, the reel 6 is composed of the protective frame bottom 3 and the coil base 5. However, the induction heating coil is wound around a separately provided reel, and the reel is mounted on the protective frame bottom. May be. Also, since the reel portion 6 is configured to be directly incorporated in the main body, it is not particularly necessary. However, an induction heating coil may be formed by applying a large current to generate heat and bonding the wires together.

As described above, according to the present invention, the electric wire 15 is wound around the reel portion 6 which is a component incorporated in the main body, and the induction heating coil 7 is formed.
In order to form the inner peripheral part 7-1 and the outer peripheral part 7-2 in which the center 5 is densely wound and the center is made rough, a spacer 8 is provided between the inner peripheral part 7-1 and the outer peripheral part 7-2. It was configured to intervene.
This eliminates the need to disassemble the jig after assembling the jig and winding the jig after molding, and furthermore, since the reel portion on which the induction heating coil has been wound is directly incorporated into the main body, the induction heating is performed in the main assembly process. Since there is no step of assembling the coil unit at the bottom of the protective frame, the number of assembly steps can be significantly reduced.

Further, since it is not necessary to disassemble the jig and transport / store only the induction heating coil, there is no fear that the induction heating coil is deformed and the heating performance is deteriorated. Storage space can also be saved.

[0022]

As described above, according to the present invention, in the configuration in which the electric wire is wound around the reel portion which is a main body built-in part and the induction heating coil is formed, the induction heating coil is densely wound around the inner peripheral portion and the outer peripheral portion. In order to form a double structure with a rough central part, a spacer is interposed between the inner peripheral part and the outer peripheral part, so it is necessary to assemble a jig, wind up the electric wire, and disassemble the jig after molding. In addition, since the reel portion on which the induction heating coil has been wound is directly incorporated into the main body, there is no step of assembling the induction heating coil alone into the bottom of the protective frame in the main assembly process, so that the number of assembling steps can be greatly reduced.

Further, since it is not necessary to disassemble the jig and transport and store it using only the induction heating coil, there is no possibility that the induction heating coil is deformed and the heating performance is deteriorated. Costs and storage space can also be saved. As described above, there is an effect that a consumer can be provided with a low-cost and high-quality induction heating cooker.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an induction heating cooker showing an example of a rice cooker according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an assembled state of a reel unit and an induction heating coil of the induction heating cooker.

FIG. 3 is a perspective view of a spacer of the induction heating coil.

FIG. 4 is a perspective view showing a method of manufacturing the induction heating coil.

FIG. 5 is a perspective view showing a next step of the manufacturing method.

FIG. 6 is a perspective view showing a further next step of the manufacturing method.

FIG. 7 is a perspective view showing a final step of the manufacturing method.

FIG. 8 is a perspective view showing a method of manufacturing an induction heating coil in which a plurality of spacers are joined at hinge joints according to another embodiment of the present invention.

FIG. 9 is a perspective view illustrating a method of manufacturing an induction heating coil including a plurality of spacers according to still another embodiment of the present invention.

[Explanation of symbols]

 3 Protective frame bottom 5 Coil base 6 Reel 7 Induction heating coil 7-1 Inner circumference 7-2 Outer circumference 8-1, 8-2, 8-3 Spacer 15 Electric wire

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-95482 (JP, A) Japanese Utility Model Application Sho 53-10452 (JP, U) Japanese Utility Model Application Utility Model Sho 63-133486 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) H05B 6/12

Claims (4)

(57) [Claims] 1. A cooking device main body , a reel portion disposed inside the cooking device main body , and an inner peripheral portion and an outer peripheral portion around which an electric wire is densely wound and a central portion is roughly wound around the reel portion so as to be divided into two parts. An induction heating cooker comprising an induction heating coil having a configuration, and applying a high-frequency current to the induction heating coil to perform induction heating.
The reel unit (6) is assembled with a plurality of induction heating cooker components.
In addition, for example, a protective frame on the upper side of the induction heating coil (7)
It can be clamped between the bottom (3) and the lower coil base (5).
The wire (15) is wound tightly around the center of the reel (6), and the inner circumference (7-1) of the induction heating coil (7) is wound.
Are formed, and the inner peripheral portion (7-
A plurality of arcuate plate-shaped spacers (8)
-1), (8-2), and (8-3) are interposed to form a rough central portion of the induction heating coil (7), and the plurality of spacers (8-1), (8-2), (8
The wire (15) is wound tightly around the outside of (3) to form an outer peripheral portion (7-2) of the induction heating coil (7).
A heating unit (17) is constituted,
(17) is taken as it is during the assembly process of the cooker body (1).
An induction heating cooker characterized by being attached and assembled . 2. The plurality of spacers (8-1), (8
The induction heating cooker according to claim 1 , wherein each of (2) and (8-3) is constituted separately. 3. The plurality of spacers (8-1), (8
-2) and (8-3) are the joints (8-4) and (8-8), respectively.
The induction heating cooker according to claim 1 , wherein the induction heating cookers are joined so as to open in the diameter increasing direction according to -5). 4. The induction heating coil (7) is tightly connected to an inner peripheral portion (7-1) of the induction heating coil (7) on a reel portion (6).
After being wound up, a plurality of arcuate plate-shaped spacers (8-1), (8-2),
(8-3) is inserted, and the electric wire (15) is densely wound around the outer periphery of the spacers (8-1), (8-2) and (8-3) in the reel (6). By configuring the outer peripheral portion (7-2) of the induction heating coil (7) , heating can be performed .
Unit (17) is formed, and the heating unit (1) is formed.
7. A method for producing an induction heating coil of an induction heating cooker, wherein the method 7) can be incorporated as it is into a product .