JPH08190983A - Electromagnetic induction heating cooker - Google Patents

Abstract

PURPOSE: To obtain an electromagnetic induction heating cooker which can obtain the best heating efficiency. CONSTITUTION: An insulating plate 4 is loaded on the upper case 1 of an electromagnetic induction heating cooker main body having a coil 3 for induction heating, a guard 6 to cover a heated container 5 is loaded on the insulating plate 4, and the heated container 5 is positioned by the guard 6 and the main body. By providing the guard 6, the container 5 is positioned securely at the center of the insulating plate 4, and the heating can be carried out in the most efficient condition, and by carrying out the positioning by the guard 6, the insulating plate 4 of a ceramic glass is never hurt by the container 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction heating cooker.

[0002]

2. Description of the Related Art Generally, an electromagnetic induction heating cooker applies a high frequency current to a heating coil and directly heats the container itself by an induction current generated in a container made of an iron material placed on the heating coil. It is used for heating and cooking.
In such an electromagnetic induction heating cooker, since the heating coil is usually wound in a circular shape, it is necessary to match the center position of the heating coil with the center position of the container in order to improve heating efficiency. Generally, a flat-bottomed insulating plate placed directly above the heating coil is used with a flat-bottomed container placed as it is, but these cannot be positioned and the container is placed on a plate. It was slippery and not easy to use. By the way, as a solution to this problem, there is a structure disclosed in Japanese Patent Publication No. 6-68969 shown in FIG. That is, in the figure, 1 is a main body case with an open top center, and 4 is this main body case 1
Insulation plate attached at the lower part of the opening of the plate, 5 is a heating container placed on the insulation plate, and 6 is a plastic positioning member interposed between the main body case 1 and the insulation plate. is there.

Therefore, when the container 5 is placed on the insulating plate 4, the container 5 can be prevented from hitting the positioning member 6 and moving outward, and is held on the insulating plate 4 in a proper positional relationship with the heating coil. Further, FIG. 24 shows another conventional technique, in which an insulating plate 4 is attached to the upper surface of the main body case 1 in a protruding state, while an annular rib 5 is provided on the outer bottom surface of the container 5, and the annular rib 5a is attached to the insulating plate. 4 is fitted and positioned in the peripheral edge portion of No. 4.

[0004]

In the electromagnetic induction heating cooker having the above-mentioned structure, in the former case, the temperature of the bottom of the container 5 becomes a high temperature exceeding 300 ° C., so that the positioning member is particularly resistant to heat. There is a problem in that the cost is increased because it is necessary for the plastic material. Further, in the latter case, ceramic glass is used as the material of the insulating plate 4 that is normally used,
There is a problem that the workability is poor, and furthermore, since the container 5 which is a cast product is placed on the insulating plate 4, the rib 5a directly hits the peripheral edge of the insulating plate 4, so that the insulating plate 4 is easily broken. It was

The present invention has been made to solve the above problems, and an electromagnetic induction heating cooker in which the container can be easily positioned on the main body and the danger of the high temperature container is prevented. The purpose is to obtain.

[0006]

In an electromagnetic induction heating cooker according to the present invention, an induction heating coil is built in, and an insulating plate is arranged on the upper surface of a main body case. A plastic guard having a cross-sectional shape is placed, the container to be heated is housed inside the guard, and the container to be heated is positioned at the upper end of the guard.

In addition, a handle made of heat-resistant plastic is provided on the container to be heated, and a recess for engaging with the handle is provided at the upper end of the guard corresponding to the handle.

Further, the handle portion of the container to be heated and the upper end portion of the guard corresponding to the handle portion are detachably fixed by the concave and convex fitting.

Further, a handle is integrally formed on the outer side surface of the guard, and an abutting piece is integrally formed on the inner side surface of the guard, and the abutting piece and the container to be heated are detachably fixed by an uneven fit. It was done.

Further, an elastic piece is integrally formed on the inner side surface of the guard, and the elastic piece and the container to be heated are detachably fixed by a concave-convex fit.

Further, an L-shaped handle made of heat-resistant plastic is fixed to the guard, and the tip end portion of the handle located on the guard and the container to be heated are detachably fixed by concave-convex fitting.

Further, convex legs are formed at the four corners of the lower end of the guard, and concave portions are provided on the upper surface of the upper case of the main body to which the convex legs are fitted.

Further, at least three sides of the lower end portion of the guard are extended downward by a predetermined dimension to form a skirt portion, and an inclined surface for fitting the skirt portion is formed on the side surface of the upper end portion of the upper case of the main body. is there.

Further, a convex portion is provided on the other upper end portion which is orthogonal to the upper end portion where the concave portion of the guard is formed.

Further, a temperature detecting device having a holder accommodated therein is provided at the center of an insulating plate arranged on the upper surface of the upper case of the main body so that the temperature detecting device can be retracted and retracted. The ribs are provided so as to project, and the ribs are fitted in the recesses of the holder.

[0016]

In the electromagnetic induction heating cooker configured as described above, the container to be heated is housed inside the guard fixed to the upper surface of the upper case of the main body, and the container to be heated is positioned by the upper end of this guard.

A handle made of heat-resistant plastic of the container to be heated engages with a recess in the upper end of the guard to position the container to be heated and the upper case of the main body.

Further, the handle of the container to be heated and the upper end of the guard corresponding to this handle are fitted into each other by projections and depressions so that the container to be heated and the guard are fixed and the positions of the container to be heated and the upper case of the main body are determined.

Further, the handle is integrally formed on the outer surface of the guard, and the abutting piece on the inner surface of the guard and the heated container are fitted by the unevenness to determine the positions of the heated container and the main body upper case.

Further, the elastic piece on the inner surface of the guard and the container to be heated are fitted into each other by the unevenness so that the positions of the container to be heated and the upper case of the main body are determined.

Further, the L-shaped handle made of heat-resistant plastic of the guard and the container to be heated are fitted into each other by the unevenness to determine the positions of the container to be heated and the upper case of the main body.

Further, the convex legs provided at the four corners of the lower end of the guard and the recesses on the upper surface of the upper case are fitted to determine the positions of the container to be heated and the upper case of the main body.

Further, the bottom edge of the guard fits on the inclined surface of the upper case to determine the positions of the container to be heated and the upper case of the main body.

Further, when the handle of the container to be heated is arranged in the concave portion of the upper end of the guard, the position with respect to the main body is determined, and when the handle of the container to be heated is arranged in the convex portion of the upper end of the guard, the container to be heated and the table are heated. A distance can be secured between the surface.

Further, the ribs on the bottom of the container to be heated are fitted into the recesses on the upper surface of the holder for accommodating the temperature detecting device to determine the positions of the container to be heated and the upper case of the main body.

[0026]

【Example】

Example 1. 1 and 2 are an exploded perspective view and a vertical sectional view of an electromagnetic induction heating cooker showing an embodiment of the present invention. In the figure, 1 is an electromagnetic induction heating cooker main body upper case, 2 is a lower body case, 3 is a heating coil, and 4 is fixed with a heat-resistant adhesive so as to cover an opening formed on the upper surface of the upper case 1. Insulation plate, 5 is a metal heated container formed by casting, etc., 6 is a heat-resistant plastic guard whose lower end portion 6b is fitted to the peripheral edge portion of the insulating plate 4, and the diameter of the upper end portion 6a is the diameter of the lower end portion. Is smaller than that of the heated container 5 and has a trapezoidal shape approximately equal to the upper diameter of the heated container 5. The height of the guard 6 is set to be substantially the same as the height of the heated container 5. Reference numeral 7 denotes an operation unit provided on the front surface of the main body upper case 1, 8 denotes a cooling fan provided to face the main body lower case 2, and 9 denotes a high frequency drive circuit.

The upper case 1 is fixed to the lower case 2, and a cooling fan 8 and a high frequency drive circuit section 9 are housed inside. The lower end portion 6b of the guard 6 is fitted to the peripheral portion of the insulating plate 4 and positioned on the main body upper case 1. When the heated container 5 is stored from the upper end 6b of the guard 6,
The heated container 5 is positioned by the guard 6 at the upper end 6a. As a result, the heated container 5 is placed in a state where the central position of the insulating plate 4, that is, the central position of the heating coil 3 is aligned. At this time, if a gap T is provided between the heated container 5 and the upper end 6a of the guard 6 so that the bottom of the heated container 5 is in close contact with the insulating plate 4,
Since the guard 6 does not come into direct contact with the container 5, an inexpensive PP (polypropylene) resin having relatively low heat resistance can be used.

Embodiment 2 FIG. 3 and 4 are an exploded perspective view and a vertical sectional view of an electromagnetic induction heating cooker showing another embodiment of the present invention. In the figure, 1 to 9 are the same as those in the first embodiment, and the description thereof is omitted. Reference numeral 21 is a handle provided on both sides of the container 5, 22 is a screw for attaching the handle 21 to the container 5, and 23 is a recessed portion that is located opposite to the handle 21 and is provided on the upper end portion 6a of the guard 6 to which the handle 21 is fitted. .

When the container 5 is stored from the upper end 6a of the guard 6, the handle 2 of the container 5 is inserted into the recess 23 provided in the guard 6.
1 is fitted and is aligned with the upper end of the guard 6 and the handle 21
The position of each other is decided by.

Example 3. 5 and 6 are an exploded perspective view and a vertical sectional view of an electromagnetic induction heating cooker showing another embodiment of the present invention. In the figure, 1 to 9 and 21 to 23 are the second embodiment.
The description is omitted. 30 is a handle 2
Reference numeral 1 denotes an L-shaped convex portion integrally provided on the lower portion of the inner end of the guard 1, and numeral 31 denotes a concave portion provided inside the concave portion 23 of the guard 6.

When the container 5 is stored from the upper end 6a of the guard 6, the convex portion 30 formed on the handle 21 of the container 5 is fitted into the concave portion 31 of the guard 6, and the container 5 and the guard 6 have this fitting structure. Will determine each other's position.

When the container 5 is detached from the guard 6, the convex portion 30 and the concave portion 31 are disengaged from each other by twisting both side surfaces of the guard 6 in the direction of arrow A.
1 can be lifted and the container 5 can be removed from the guard 6. In this case, the handle 21 is made of a heat-resistant plastic material, and the guard 6 itself does not have to be a material having such high heat resistance. This is because the container 5 having the handle 21 and the guard 6 are integrated.

Example 4. 7 and 8 are an exploded perspective view and a longitudinal sectional view of an electromagnetic induction heating cooker showing still another embodiment of the present invention. In the figure, 1 to 9 are the same as those in the first embodiment, and the description thereof is omitted. Reference numeral 21 denotes a handle integrally provided horizontally on both side surfaces of the upper end portion 6a of the guard 6, and reference numeral 41 denotes an abutting piece provided on the inner side surface of the upper end portion of the guard 6 so as to face the handle 21 and extend obliquely downward. The inwardly protruding portion 30 is provided at the tip of the contact piece 41. Reference numeral 31 is a recess 31 provided on the outer surface of the container 5.

When the container 5 is housed from the upper end 6a of the guard 6, the convex portion 30 at the tip of the contact piece 41 is fitted into the concave portion 31 of the container 5 to fix them, and the container 5 and the guard 6 are fixed. Are positioned relative to each other. Then, when removing the container 5 from the guard 6, the handle 21 is held and twisted in the direction of the arrow B.
The container 5 can be lifted in this state because it comes out from 1.

Example 5. 9 and 10 are an exploded perspective view and a vertical sectional view of an electromagnetic induction heating cooker showing another embodiment of the present invention. In the figure, 1 to 9 are the same as those in the first embodiment, and the description thereof will be omitted. Reference numeral 62 denotes an elastic piece integrally formed on the inner surface of the upper end portion of the guard 6 and extending obliquely downward to almost the height of the guard. The convex portion 30 is formed on the inner surface of the elastic piece 62, while facing the elastic piece 62 of the container 5. A concave portion 31 that fits with the convex portion 30 is formed on the outer side surface. Therefore,
When the container 5 is pushed in from the upper end of the guard 6, the elastic piece 62
Is deformed inward by being pressed by the convex portion 30, and is fitted and positioned at a position where the convex portion of the elastic piece 62 and the concave portion 31 of the container 5 face each other. When removing the container 5 from the guard 6, it can be easily removed by pulling up the container against the elastic force of the elastic piece. Reference numeral 61 is a finger hook concave portion provided on the lower end portion of the guard to lift the guard 6 together with the container 5. An elastic piece 62 is interposed between the concave portion and the container 5 to ensure safety against a high temperature container. Has been secured.

Example 6. 11 and 12 are an exploded perspective view and a vertical sectional view of an electromagnetic induction heating cooker showing another embodiment of the present invention. Since 1 to 9 are the same as those in the first embodiment, the description thereof will be omitted. Reference numeral 21 denotes an L-shaped handle fixed to the upper end portion 6a of the guard 6 with a screw 22, and an inwardly projecting portion 30 is provided at the tip portion located inside the guard, while the container 5
A concave portion 31 into which the convex portion 30 is fitted is formed on the outer surface facing the tip of the handle. Therefore, the container 5
When the guard 6 is pushed in from the upper end portion of the guard 6, the guard 6 itself elastically deforms, and the concave portion 31 of the container 5 becomes
When it reaches the position, the convex portion is fitted into the concave portion by the elastic force and positioned. Then, when the handle 21 is rotated in the direction of the arrow B, the guard itself is twisted and the convex portion 30 is disengaged from the concave portion 31, and the container 5 can be removed from the guard 6.

Example 7. FIG. 13 is an exploded perspective view of an electromagnetic induction heating cooker showing another embodiment of the present invention, and FIG. 14 is a sectional view showing a state in which a container and a guard are placed on a table. Reference numeral 1 is an upper case of the main body, to which an insulating plate 4 is attached. Reference numeral 72 is an L-shaped recess formed at a predetermined depth at four corners of the main body case 1, and 6 is a guard made of heat-resistant plastic. Are formed to project. The depth of the recess 72 is set to such a value that the outer bottom surface 74 of the container 5 contacts the insulating plate 1 when the support leg 71 of the guard 6 is fitted. Therefore, when the guard 6 is placed on the table 73 with the container 5 stored therein, the container 5 is separated from the surface of the table 73 by the distance d (about 10 mm).

Example 8. 15 and 16 are an exploded perspective view and a vertical sectional view of an electromagnetic induction heating cooker showing another embodiment of the present invention. Reference numeral 1 denotes an upper case of the main body, which has an insulating plate 4 mounted on the upper surface thereof and has inclined surfaces 82 formed on at least upper edges of three side surfaces thereof. Reference numeral 6 denotes a guard mounted on the upper surface of the upper case 1 of the main body so as to surround the insulating plate 4. As shown in FIG. 15, at least three sides of the guard 6 extend below the mounting level on the upper case 1. Hem 81
Is provided. Therefore, when the guard 6 is placed on the upper case, the hem 81 of the guard is brought into contact with the inclined surface of the upper case 1 to be positioned, and if the guard 6 is placed on the table with the container 5 placed thereon, the hem 81 of the hem 81 The container 5 is separated from the table surface by the height.

Example 9. 17 and 18 are an exploded perspective view and a vertical sectional view of an electromagnetic induction heating cooker showing another embodiment of the present invention. According to this embodiment, the handle 21 is provided on both side surfaces of the container 5 in the second embodiment, and the escape recess 23 of the handle 21 is formed at the upper end of the guard 6, but the escape recess 91 of the guard 6 is formed. A convex portion 91 is formed at the upper end of the other two sides. And container 5
When the guard 6 accommodating the is placed on the table 73, the container 5 is rotated 90 degrees so that the handle 21 is positioned to face the convex portion 91. Can be secured.

Example 10. 19 and 20 are an exploded perspective view and a longitudinal sectional view of an electromagnetic induction heating cooker showing still another embodiment of the present invention, in which a circular opening 101 is provided in the central portion of the insulating plate 4, and this opening is provided. A temperature sensing unit 102 of the temperature detecting device projects from 101 above the insulating plate 4. The temperature sensitive portion 102 is housed in a holder 103 by a spring 104 so that the temperature sensitive portion 102 can be retracted. The holder 103 has a rectangular recess 105 on the upper end surface.
A square-shaped protrusion 106 corresponding to No. 5 is provided on the bottom of the container 5. Therefore, when the container 5 is placed on the insulating plate 4, the quadrangular protrusion 106 fits into the quadrangular recess 105, and the container 5 is fixed to the central position of the insulating plate 4.

Example 11. 21 and 22 are an exploded perspective view and a vertical cross-sectional view of an electromagnetic induction heating cooker showing still another embodiment of the present invention, in which a rib-shaped protrusion 111 surrounds the periphery of the insulating plate 4 and a case on the main body. 1 is integrally formed on the upper surface. The insulating plate 4 is fitted into the rib-shaped projection 111 and fixed by adhesion. The other structure is the same as that of the tenth embodiment.

[0042]

The present invention is constructed as described above, and is provided with a divergent guard that covers the periphery of the container to be heated, and the container is placed at the upper end of this guard. Since the contact portion with the guard is located away from the heating coil, it is not necessary to use an expensive heat-resistant material as the positioning structure, and the positioning structure can be made of an inexpensive material. Also,
Since the guard is made of plastic, it does not directly damage the insulating plate. Furthermore, since the container that becomes hot is covered with a guard, the user does not touch the container and can prevent the risk of burns and the like.

Further, by fitting the handle provided on the container into the recess of the guard, the container can be reliably positioned at the center of the insulating plate, and heating can be performed in the most efficient state.

Further, since the locking member is provided, when the handle is lifted to remove the container from the main body, when the handle is lifted, the handle moves together with the guard, and the container integrated with this guard is placed directly on the table. Even with the guard, you can avoid damage such as scorching.

Further, since the guard is provided with a handle, only this handle needs to be made of a heat-resistant material, and the guard can be made of a more inexpensive material. Further, since the locking member is provided, the container and the guard can be separated. By moving together, the guard can prevent scorching due to a high temperature container when it is placed on the table.

Further, since the handle is integrated with the guard, the structure is simple, the number of parts is small, and cleaning is easy. Furthermore, the contact piece inside the guard prevents the operator from directly touching the container when holding the handle, and prevents burn accidents.

Further, by fitting the convex leg of the guard into the concave portion of the upper case, the container can be surely positioned in the main body, and the container fixed to the guard is removed from the main body and placed on the table. Even when placed, the convex legs of the guard allow a distance between the table and the container, and prevent scorching on the table.

By placing the handle of the container on the convex portion provided on the guard, a distance can be secured between the container and the table, and scorching on the table is prevented.

By positioning the insulating plate and the container in the central part, the central position of the container can be surely aligned with the central position of the coil, and a high heating efficiency can be obtained. . Further, the positioning component is made of conventional members and can be formed at low cost.

Further, since the peripheral edge of the insulating plate is covered with the ribs, it is possible to prevent damage to the insulating plate made of, for example, ceramic, improve reliability, and use an inexpensive material as the insulating plate.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electromagnetic induction heating cooker showing a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the electromagnetic induction heating cooker showing the first embodiment of the present invention.

FIG. 3 is an exploded perspective view of an electromagnetic induction heating cooker showing a second embodiment of the present invention.

FIG. 4 is a vertical sectional view of an electromagnetic induction heating cooker showing a second embodiment of the present invention.

FIG. 5 is an exploded perspective view of an electromagnetic induction heating cooker showing a third embodiment of the present invention.

FIG. 6 is a vertical sectional view of an electromagnetic induction heating cooker showing a third embodiment of the present invention.

FIG. 7 is an exploded perspective view of an electromagnetic induction heating cooker showing a fourth embodiment of the present invention.

FIG. 8 is a vertical sectional view of an electromagnetic induction heating cooker showing a fourth embodiment of the present invention.

FIG. 9 is an exploded perspective view of an electromagnetic induction heating cooker showing a fifth embodiment of the present invention.

FIG. 10 is a vertical sectional view of an electromagnetic induction heating cooker showing a fifth embodiment of the present invention.

FIG. 11 is an exploded perspective view of an electromagnetic induction heating cooker showing a sixth embodiment of the present invention.

FIG. 12 is a vertical sectional view of an electromagnetic induction heating cooker showing a sixth embodiment of the present invention.

FIG. 13 is an exploded perspective view of an electromagnetic induction heating cooker showing a seventh embodiment of the present invention.

FIG. 14 is a vertical sectional view of an electromagnetic induction heating cooker showing a seventh embodiment of the present invention.

FIG. 15 is an exploded perspective view of an electromagnetic induction heating cooker showing an eighth embodiment of the present invention.

FIG. 16 is a vertical sectional view of an electromagnetic induction heating cooker showing an eighth embodiment of the present invention.

FIG. 17 is an exploded perspective view of an electromagnetic induction heating cooker showing a ninth embodiment of the present invention.

FIG. 18 is a vertical sectional view of an electromagnetic induction heating cooker showing a ninth embodiment of the present invention.

FIG. 19 is an exploded perspective view of an electromagnetic induction heating cooker showing a tenth embodiment of the present invention.

FIG. 20 is a vertical sectional view of an electromagnetic induction heating cooker showing a tenth embodiment of the present invention.

FIG. 21 is an exploded perspective view of an electromagnetic induction heating cooker showing an eleventh embodiment of the present invention.

FIG. 22 is a vertical sectional view of an electromagnetic induction heating cooker showing an eleventh embodiment of the present invention.

FIG. 23 is a part of a vertical sectional view showing a conventional electromagnetic induction heating cooker.

FIG. 24 is a part of a vertical sectional view showing another conventional electromagnetic induction heating cooker.

[Explanation of symbols]

1 upper case, 2 lower case, 3 induction coil, 4 insulating plate, 5 container, 6 guard, 7 operating part, 8
Cooling fan, 9 high frequency drive circuit.

Front Page Continuation (72) Inventor Tetsusho Hisa, 1728 Omaeda, Omaeda, Hanazono-cho, Saitama Prefecture 1728 Mitsubishi Electric Home Equipment Co., Ltd. (72) Takahiro Amano 1728 1-Maeda, Hanazono, Osato-gun Saitama Prefecture 1 Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Naoyuki Suwa 1728 Omaeda, Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd.

Claims (10)

[Claims] 1. A plastic guard having a divergent cross-section is placed on the upper surface of a main body case having an induction heating coil inside and an insulating plate disposed on the upper surface of the main body upper case. An electromagnetic induction heating cooker characterized in that a heated container is housed and arranged inside the guard, and the heated container is positioned at the upper end of the guard. 2. The electromagnetic induction according to claim 1, wherein the container to be heated is provided with a handle made of heat-resistant plastic, and the upper end of the guard corresponding to the handle is provided with a recess for engaging with the handle. Heating cooker. 3. The electromagnetic induction heating cooker according to claim 2, wherein the handle and an upper end of the guard corresponding to the handle are detachably fixed by a concave-convex fit. 4. A handle is integrally formed on the outer side surface of the guard, and a contact piece is integrally formed on the inner side surface of the guard. The electromagnetic induction heating cooker according to claim 1, which is fixed. 5. The electromagnetic induction heating according to claim 1, wherein an elastic piece is integrally formed on the inner surface of the guard, and the elastic piece and the container to be heated are detachably fixed by a concave-convex fit. Cooking device. 6. An L-shaped handle made of heat-resistant plastic is fixed to the guard, and a tip portion of the handle located inside the guard and the heated container are detachably fixed by a concave-convex fit. The electromagnetic induction heating cooker according to claim 1, which is characterized in that. 7. The guard according to claim 1, wherein convex legs are formed at four corners of a lower end portion of the guard, and concave portions into which the convex legs are fitted are provided on an upper surface of the main body upper case. Electromagnetic induction heating cooker. 8. A hem portion is formed by extending at least three sides of a lower end portion of the guard downward by a predetermined dimension, and an inclined surface for fitting the hem portion is formed on a side surface of an upper end portion of the main body upper case. The electromagnetic induction heating cooker according to claim 1, wherein: 9. The electromagnetic induction heating cooker according to claim 2, wherein a convex portion is provided on the other upper end portion orthogonal to the upper end portion where the concave portion of the guard is formed. 10. A temperature detecting device housed in a holder is provided in a central portion of an insulating plate disposed on the upper surface of the upper case of the main body so as to be retractable, and a recess is formed on the upper surface of the holder, and the temperature detecting device is formed on the bottom of the container to be heated. A rib is provided so as to project, and the rib is fitted into the recessed portion of the holder.
The electromagnetic induction heating cooker described.