JP3106519U - Electric induction heating vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a perforated body, in which a protrusion is formed on a bottom surface portion of a container along an outer peripheral edge portion, and a molding thickness with a container body material is kept constant. To provide an electric induction heating container having an excellent bonding force.
In a heating container 10 in which a magnetic plate 20 is fixed on the bottom surface of the container, the magnetic plate 20 is composed of a perforated net 22 and a protrusion 21 positioned in a positioning groove of a mold is provided on the outer peripheral surface thereof. A positioning member 30 is provided for forming and fixing the installation position in the mold.
[Selection] Figure 1

Description

  The present invention relates to an electric induction heating container, and more particularly to an electric induction heating container having a magnetic plate fixed to the bottom surface of the container.

  An electric induction heating container generates magnetic lines of force by passing an alternating current through the induction heating coil in the induction range, and if a container (containing an iron component) that passes the magnetic force is placed in the center of the magnetic field lines, the bottom of the container itself This is a direct heating heating container that generates heat by the effect of eddy current.

  That is, when the power is turned on by the above method, the cooker itself induces an electric current and generates electricity at a high frequency to generate a magnetic force.

  Therefore, the magnetic force generated by the high frequency causes electromagnetic fission in the metal container of the iron component, so that a current vortex is generated and a large amount of current flows. At this time, the container itself acts like a nichrome wire, applying the principle of generating heat.

  And cooking containers such as frying pans and pans were molded and manufactured with aluminum material, but the main body made of aluminum material is used so that it can be used as an electromagnetic induction heater that has been widely used in the near future. A disk-shaped magnetic body is joined to the bottom by brazing (brazing).

  Conventionally, the electromagnetic induction heater is made the same diameter as the bottom of the container, and high frequency bonding is performed in a flat form by a method of attaching a metal magnetic plate with an appropriate thickness. However, when cooking using an electromagnetic induction heater, the bottom surface, which was flat when high heat is applied, thermally expands, and the central portion is curved and protrudes toward the heating surface.

  Therefore, the bottom surface of the central portion of the cooking container comes into contact with the non-heat generating portion in the central portion of the electromagnetic induction heater and the magnetic force is not transmitted to the cooking container, so that the thermal efficiency is reduced and the cooking time is increased. There was a problem.

  In addition, when the cooking container generates heat on the electromagnetic induction heater, the adhesive force of the magnetic plate is reduced due to the difference in thermal expansion and contraction rate between the magnetic plate thermally bonded at high frequency and the container body. There was a problem that the plate was easily separated from the container body.

  On the other hand, recently, as a means for improving the coupling force between the magnetic plate and the container body, a punching member that perforates the magnetic plate and protrudes around the perforated portion is used to fill the container body from the inside of the mold. Mold in trouble.

  In this case, since the magnetic plate is in a perforated state and has an uneven shape, after being placed inside the mold, when injecting a material that forms the container body, mainly a molten liquid heated with aluminum, Resistance is generated in the direction of entry around the punched plate.

  Therefore, since the molten metal is not molded in a state where a certain thickness is maintained, there is a problem that the thickness of the finished product is not flat and becomes uneven.

  Also, since the thickness of the container body is not uniformly formed when the perforated magnetic plate is embedded inside, the degree of temperature expansion due to the difference in thickness becomes different due to repeated use. There were inconveniences such as cracks.

  Therefore, the present invention has been made in view of such problems, and the object of the present invention is a perforated body, in which a protrusion is formed on the bottom surface of the container along the outer peripheral edge. An object of the present invention is to provide an electric induction heating container having an excellent bonding force between both materials because the thickness of the molding with the container body material is kept constant.

  Another object of the present invention is to provide an electric induction heating container that can maintain a constant thickness between the container body and the magnetic plate and reduce the risk of cracking due to a difference in thermal expansion.

  Still another object of the present invention is not only to reduce the resistance at the entrance of the container body material melted in the molding process to make the thickness of the finished product constant, but also to provide flatness to ensure product reliability and product quality. An object of the present invention is to provide an electric induction heating container capable of improving the performance.

  In order to solve the above problems, according to the aspect of the present invention, in order to achieve the above object, in a heating vessel in which a magnetic plate is fixed to the bottom surface of the vessel, the magnetic plate is composed of a porous mesh body, and its outer periphery. Protrusions positioned in the positioning grooves of the mold are formed on the surface, and a positioning member for making the installation position constant in the mold is provided.

  Therefore, in the process of forming the container, the magnetic plate formed by repeatedly forming the uneven portion with the porous net is firmly melt-bonded in a state of being embedded at a predetermined depth, so that the container and the magnetic plate are connected. Longer fixed attachment.

  In addition, the thickness between the container body and the magnetic plate can be kept constant, and the risk of cracking due to the difference in thermal expansion can be reduced. Moreover, not only can the thickness of the finished product be constant, but it can also have flatness to improve product reliability and merchantability.

  As described above, according to the present invention, the magnetic plate and the cooking container are more reliably coupled to prevent in advance the relaxation and separation due to the difference in thermal expansion coefficient or impact during use. be able to.

  In addition, by maintaining a constant thickness between the container body and the magnetic plate, the risk of cracking due to thermal expansion differences can be reduced. In addition to making the thickness of the finished product constant, it is possible to improve the reliability and merchantability of the product by providing flatness.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a half cross-sectional view showing an electric induction heating vessel completed by the present invention. FIG. 2 is a cross-sectional view showing a state where an electric induction heating container according to an embodiment of the present invention is molded using a mold, and FIG. 3 is a partially enlarged cross-sectional view of FIG.

  FIG. 4 is an enlarged perspective view showing a state in which the positioning member 30 is assembled to the perforated magnetic plate 20, and FIG. 5 shows the arrangement state of the perforated protrusions on the magnetic plate 20 according to the embodiment of the present invention. FIG.

  That is, as shown in FIG. 1, the electric induction heating container 10 is composed of a metal material installed on the induction range and joined to the bottom surface 11 of the heating case 10 and magnetic lines generated from the induction heating coil in the induction range. It is a cooking container that causes food and drink in the container to be heated by causing division.

  The bottom surface 11 of the heating container 10 is attached with a magnetic plate 20 which is a metal plate material containing an iron component and hardly generates rust, and has excellent heat resistance, heat reflectivity, high temperature corrosion resistance, and workability. The

  As shown in FIGS. 2 and 5, the magnetic plate 20 of the present invention has a disk shape with a central portion perforated, and a protrusion 21 having a predetermined height is formed on the outer peripheral surface thereof.

  Normally, the depth of the protrusion 21 is bent at a height similar to the thickness of the heating container 10, but it is generally preferable to form the protrusion 21 to about 4.5 mm.

  The main body of the magnetic plate 20 is formed as a perforated net 22 having a shape that is perforated at a constant interval. At this time, a plurality of substantially U-shaped connecting pieces 23 are connected around the hole in the perforating process. Formed with a structure. Further, as shown in FIG. 4, the connected body in which a plurality of connection pieces 23 each having a substantially square shape are connected to each other, and the magnetic plate 20 is formed. As shown in FIG. 5, when the magnetic plate 20 is fixed in the mold 1, it is arranged so that the triangular corners are located at the inlet for injecting the molten material constituting the heating container 10. Is preferred.

  This is to reduce the resistance generated by the plurality of connecting pieces 23 when the molten material enters the inside of the mold 1 through the entrance, thereby facilitating the pouring of the molten metal.

  When the magnetic plate 20 is fixed in the mold 1, it is preheated at a predetermined temperature to prevent inconvenience that the magnetic plate 20 is not completely bonded at the boundary of the material due to a temperature difference from the molten metal. Mounting.

  The preheating temperature of the magnetic plate 20 is preferably such that the melting temperature of aluminum forming the heating container 10 is slightly lower than 600 to 700 ° C, and is maintained at 400 to 500 ° C.

  And the protrusion 21 bent along the peripheral edge of the magnetic plate 20 is positioned in the positioning groove 2 dug in the mold 1, so that the magnetic plate can be obtained without a separate position setting tool. 20 is set at an accurate position in the heating container 10. On the other hand, several positioning members 30 are fitted and fixed to the magnetic plate 20.

  The positioning member 30 maintains a constant interval between the mold 1 and the magnetic plate 20 in a state where the magnetic plate 20 is positioned in the mold 1. As a result, the gap between the magnetic plate 20 and the mold 1 is kept constant until the molten material is poured into the mold 1 and cooled and completed.

  Therefore, the thickness of the magnetic plate 20 and the heating container 10 filled therearound is kept constant, so that the flatness of the finished product is maintained.

  In addition, the gap between the two materials having different thermal expansion coefficients is kept constant. Therefore, even if the finished product is repeatedly heated and cooled, the degree of change in thermal expansion can be reduced by maintaining the thickness constant. As a result, the risk of cracking can be reduced, and the product surface can be prevented from becoming uneven by repeated use.

  The positioning member 30 is positioned between the mold 1 and the magnetic plate 20. In the molding process, the role of maintaining the distance between the mold 1 and the magnetic plate 20 is most important. Therefore, it is preferable to mold with the same aluminum material as the heating container 10.

  That is, by positioning and positioning the positioning member 30 with an aluminum material such as the heating container 10, the positioning member 30 normally functions to keep the interval constant in the installation state in the mold 1 immediately before melting. It was. After the molten material is charged, the positioning member 30 is also melted by the melting temperature and integrated with the heating container 10.

  As shown in FIG. 5, the positioning member 30 is fixedly attached to the plurality of magnetic plates 20, but there is a risk that entry resistance may occur at the position of the molten material inlet as indicated by the arrow. .

  The positioning member 30 has a rod shape with a head 31 and is fixedly installed by forcibly fitting it into the hole of the drilled magnetic plate 20.

  The present invention is applicable to electromagnetic induction heating containers.

It is a half section view of the electric induction heating container concerning the present invention. It is sectional drawing which shows a mode that the electric induction heating container which concerns on this invention is shape | molded using a metal mold | die. It is a partially expanded sectional view of FIG. It is the expanded perspective view which shows a mode that a positioning member is assembled with the magnetic board of this invention. It is the front view which showed the magnetic board of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating container 11 Bottom surface 20 Magnetic plate 21 Protrusion part 22 Porous net body 23 Connection piece 30 Positioning member

Claims (3)

An electromagnetic induction heating container having a magnetic plate fixed to the bottom of the container,
The magnetic plate is composed of a perforated net body, and has a positioning member for forming a protrusion located in the positioning groove of the mold on the outer peripheral surface thereof, and making the installation position constant in the mold. An electric induction heating container.   The porous network connected by a plurality of substantially U-shaped connecting pieces around the perforated portion of the magnetic plate is an injection port into which a molten material is injected when the magnetic plate is fixed in the mold. The electric induction heating container according to claim 1, wherein the connecting piece is disposed such that a triangular corner portion of the connecting piece is positioned toward the side. The electric induction heating container according to claim 1, wherein the positioning member is an aluminum material.

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