KR200490693Y1 - Electric Plate for Induction Heating Cooker - Google Patents

Abstract

The present invention generates a magnetic field in an induction heating cooking vessel for cooking food using an induction heating method, and is used in an induction heating cooking vessel manufactured by a casting method. To increase the adhesion to the non-conductive material to increase the separation from the cooking vessel even after long-term use relates to a heating plate for cooking vessel,
A main body 10 having a center hole 11 formed in the center thereof and having a flat surface at its bottom; A depression 15 formed along the circumferential direction at a position spaced from the center hole 11 by a predetermined distance; A plurality of inner holes 12 formed regularly or irregularly between the center hole 11 and the depression 15; A plurality of outer holes 13 formed regularly or irregularly between the depression 15 and the edge of the main body 10; And a recessed hole 16 formed in the recessed portion 15 at regular intervals along the circumferential direction.

Description

Electric plate for Induction Heating Cooker

The present invention relates to a heating plate for an induction heating cooking vessel to generate a magnetic field in the induction heating cooking vessel for cooking food using an induction heating method, in particular used in the induction heating cooking vessel manufactured by the casting method, The present invention relates to a heating plate for an induction heating cooking vessel in which a depression in the direction is formed to increase the contact area of the molten metal, thereby improving adhesion to the non-conductive material and thus preventing separation from the cooking vessel even after long-term use.

Induction ranges generally have a built-in coil for generating a magnetic field when a high voltage is applied to the induction range, and such an induction range induces a magnetic field when a high voltage is applied to the coil. It refers to a heating device using the principle that the metallic body is heated.

Since the induction stove does not generate a flame or harmful gas, there is no risk of fire, and it is possible to prevent harmful gas such as carbon monoxide, which is inevitably generated when the gas is used as a heat source. There is an advantage to keep it. Induction stoves do not cause burns even when the grille is touched while the container is heated.There is no spark, so there is no risk of fire or explosion, and the body does not burn even when the grille is touched while the power is on. It has been used a lot recently.

On the other hand, in the induction stove it is not possible to use a conventional cooking vessel using a flame, in order to be magnetically induced by the magnetic field generated in the induction stove can be used only the cooking vessel formed by the bottom surface of the conductive conductor. This cooking vessel is called an induction heating cooking vessel. The induction heating cooking container should be formed of a metal containing an iron (Fe) component, that is, a conductive metal in order to induce magnetic fields.

In other words, the induction stove can only use a cooking vessel made of a metal material capable of self-sensitization with the magnetic field generated by high voltage, and made of a cooking vessel made of a non-ferrous metal such as aluminum or stone and porcelain type that occupies most of the cooking vessel. Cooking containers cannot be used. Accordingly, in order to use cooking vessels such as pots, pans, kettles and pressure cookers in induction stoves, a heating plate containing iron is attached to the bottom surface of a non-ferrous metal plate, and an induction heating cooking vessel of this type is used. It is manufactured by joining heterogeneous materials of nonferrous metals and ferrous metals.

On the other hand, as a welding method of heterogeneous materials used in induction heating cooking vessels, welding between different materials is common, but it is difficult to apply to the die casting method used for the production of cooking vessels because it is simple and mass-produced. In other words, when the welding method is used, the production quantity is limited, so the cost increases, and when the cooking vessel is produced by the die casting method, it is not only difficult to integrate the container body of the different materials and the heat transfer plate, but even if it is integrated, the heat transfer plate falls after a certain time. There is a problem.

Accordingly, a method of compressing and integrating a heat transfer plate onto the bottom surface of the heat transfer plate body by using a burr or a protrusion formed around the hole in the process of drilling a plurality of holes in the heat transfer plate and drilling the hole has been studied. Using this method has the advantage that the heat transfer plate is firmly attached to the heat transfer plate body to improve the durability of the product.

However, this method also has a disadvantage in that the heat transfer plate falls off for a long time due to the characteristics of the thermocompression bonding method.

Accordingly, in recent years, a method of manufacturing an induction heating cooking vessel using a casting method in a state in which a heating plate is put into a mold has been developed.

In the above-described induction heating cooking vessel manufacturing method of the casting method is to produce a cooking vessel by pouring aluminum molten metal on the heat transfer plate in the mold, the heat transfer plate and the cooking vessel body is integrally molded to reduce the risk of separation of the heating plate.

However, the conventional heating plate for induction heating cooking vessels are formed by only a plurality of holes perforated or simply formed with protrusions formed around the holes. There may be a gap in the case and in some cases the heat transfer plate has a problem that is separated from the cooking vessel body.

On the other hand, as a result of examining the prior art related to the present invention, a number of patent documents were searched, and some of them are introduced as follows.

Patent Literature 1, a perforated portion formed by drilling in a predetermined shape; A bent portion provided in the perforated portion and bent upward to be integrally attached to the container body; It is made of a cutting portion formed by cutting outwardly from the center portion, and when injecting a non-conductive metal material which is located inside the mold to form the container body, the container is not inclined to one side due to the inhomogeneity of the injected pressure. Disclosed is a conductive plate of an induction range cooking vessel which is not separated from the main body.

Patent Literature 2 discloses a heating plate for an induction heating cooking vessel used in a casting-type induction heating cooking vessel manufactured by pouring a nonferrous metal molten metal into a cooking vessel manufacturing mold, and the molten metal can reach the mold surface of the heating plate body. A plurality of holes are formed so as to have a protrusion formed to protrude upward along the periphery of at least some of the holes, and a locking jaw formed to protrude in the inward direction of the hole at the end of the protrusion, thereby providing a contact area with the molten metal during casting. The increase of the coupling force with the cooking vessel main body is improved, as well as preventing the separation from the cooking vessel main body due to the locking step, and discloses a heating plate for an induction heating cooking vessel.

Patent document 3, the first step of seating the induction heating plate on the upper surface of the pressure plate provided to be elevated in the bottom surface of the mold having a cavity of the profile corresponding to the outer shape of the cooking vessel main body and injecting molten metal; A second step of cooling the molten metal to a reaction state in the mold; A third step of removing pores between the molten metal and the induction heating plate by pressing the pressing plate upward in a reaction state of the molten metal forming the outer shape of the main body; And a fourth step of extracting and post-processing the cooking vessel body attached to the lower surface of the induction heating plate by cooling the mold after cooling for complete solidification of the molten metal, and preventing partial peeling of the induction heating plate. Disclosed is a method of manufacturing an induction cooking container by induction heating plate insertion reaction high pressure casting.

Patent Document 1: KR10-0732946 B1 Patent Document 2: KR20-2012-0005362 U Patent Document 3: KR10-1203055 B1

The present invention was devised to solve the above problems of the prior art, which is used in an induction heating cooking vessel manufactured by a casting method, but the circumferential depression is formed on the casting surface to increase the contact area of the molten metal and The purpose of the present invention is to provide a heating plate for an induction heating cooking container which is improved in adhesion and is not separated from the cooking container even when used for a long time.

The present invention for achieving the above object is the center hole is formed in the center and the bottom surface is made of a flat portion; A depression formed along the circumferential direction at a position spaced from the center hole by a predetermined distance; A plurality of inner holes formed regularly or irregularly between the center hole and the depressions; A plurality of outer holes formed regularly or irregularly between the depression and the edge of the main body; And a recess hole formed at a predetermined interval along the circumferential direction of the recess.

In addition, according to the heating plate for an induction heating cooking vessel of the present invention, the inner hole is formed in three rows in the radial direction, the outer hole is formed in four rows in the radial direction, characterized in that the recess hole is formed in two rows. do.

In addition, according to the heating plate for induction heating cooking vessel of the present invention, the outer hole is connected to the fourth column and the fourth column from the edge of the main body and the four circumferential long holes formed at regular intervals in the third row from the edge of the main body And four radial holes formed therein, wherein the radial holes are disposed between the circumferential holes.

In addition, according to the heating plate for the induction heating cooking vessel of the present invention, the auxiliary depression formed in the body in the radial direction and the same depth as the depression so as to follow the depression; further comprising the auxiliary depression Recessed hole corresponding to the inner hole and the outer hole is characterized in that formed in the.

In addition, according to the heating plate for induction heating cooking vessel of the present invention, the depth of depression of the depression is characterized in that 0.2 to 0.5 times the thickness of the main body.

In the heating plate for the induction heating cooking vessel of the present invention, the contact area of the melt during casting is greatly increased as a number of holes are formed and the depression is formed on the casting surface, and the melt flows into the recess and each hole to be hardened. Therefore, the bonding force with the cooking vessel is improved to be firmly fixed, so that there is an effect of being separated from the cooking vessel even when used for a long time.

In addition, according to the heating plate for the induction heating cooking vessel of the present invention, as the auxiliary recess in the radial direction is formed in addition to the depression in the circumferential direction, the contact area of the melt is further increased to improve the bonding force with the cooking vessel and the cooking vessel body It is firmly fixed to the effect.

1 is a perspective view of a heating plate for induction heating cooking vessel according to the present invention.
Figure 2 is a plan view of a heating plate for induction heating cooking vessel according to the present invention.
Figure 3 is a bottom view of the heating plate for induction heating cooking vessel according to the present invention.
Figure 4 is a cross-sectional view showing the depression of the heating plate for induction heating cooking vessel according to the present invention.
5 is a plan view showing another embodiment of the present invention.
Figure 6 is a cross-sectional view of the induction heating cooking vessel to which the heating plate for induction heating cooking vessel of the present invention.

Hereinafter, with reference to the accompanying drawings will be described with respect to the heating plate for induction heating cooking vessel of the present invention.

1 is a perspective view of a heating plate for induction heating cooking vessel according to the present invention, Figure 2 is a plan view of a heating plate for induction heating cooking vessel according to the present invention, Figure 3 is a bottom view of the heating plate for induction heating cooking vessel according to the present invention. 4 is a cross-sectional view showing a depression of the heat transfer plate for induction cooking vessel according to the present invention. And, Figure 6 is a cross-sectional view of the induction heating cooking vessel to which the heating plate for induction heating cooking vessel of the present invention is applied.

The heating plate for induction heating cooking vessel according to the present invention, as shown in Figure 1 to 4, the center hole 11 is formed in the center and the bottom surface is made of a flat portion 10; A depression 15 formed along the circumferential direction at a position spaced from the center hole 11 by a predetermined distance; A plurality of inner holes 12 formed regularly or irregularly between the center hole 11 and the depression 15; A plurality of outer holes 13 formed regularly or irregularly between the depression 15 and the edge of the main body 10; And a recessed hole 16 formed in the recessed portion 15 at regular intervals along the circumferential direction.

At this time, it is preferable that the inner holes 12 are formed in three rows in the radial direction and at regular intervals in the circumferential direction. The outer holes 13 are preferably formed in four rows in the radial direction and formed at regular intervals in the circumferential direction. In addition, the recessed holes 16 are preferably formed in two rows and formed at regular intervals in the circumferential direction.

In addition, the outer hole 13 has four circumferential long holes 13a formed at regular intervals in the third row from the edge of the main body 10, and the fourth row formed by connecting the third row and the fourth row from the edge of the main body 10. More preferably, the radially long holes 13b are included. At this time, a radial long hole 13b is disposed between the circumferential long holes 13a. As such, the circumferential long hole 13a and the radial long hole 13b are provided so that the contact area of the melt increases as the side surface area of the hole increases, thereby further improving the bonding force between the heat transfer plate and the cooking vessel body 20. do.

The depth of depression of the depression 15 is preferably 0.2 to 0.5 times the thickness of the body. If the depth of depression of the depression 15 is less than 0.2 times the thickness of the body, the increase in the contact area of the molten metal by the depression 15 is weak, and if the depth of depression of the depression 15 exceeds 0.5 times the thickness of the body. This is because not only there is difficulty in processing, but also the coupling force in the recess hole 16 may be weakened.

In this case, the depression 15 may form a bridge portion (not shown) not recessed at a predetermined interval so that the molten metal for forming the cooking vessel body 20 may be entangled.

The heating plate for induction heating cooking vessel of the present invention configured as described above is disposed on the bottom of the mold and attached integrally to the cooking vessel when the cooking vessel is manufactured by casting using aluminum or aluminum alloy molten metal.

After placing the main body 10 of the heat transfer plate on the upper side of the lower mold of the cooking vessel mold, the upper mold is coupled to the lower mold and aluminum or aluminum alloy molten metal is injected into the mold to cast the cooking vessel. At this time, the main body 10 should be placed so that the flat portion of the bottom surface in contact with the lower mold to allow the aluminum or aluminum alloy molten metal to flow into the depression 15 formed on the upper surface.

Accordingly, the aluminum or aluminum alloy molten metal introduced into the mold is filled in the center hole 11, the inner hole 12, and the outer hole 13 of the main body 10, and then flows into the depression 15. The depression hole 16 is also filled in the interior of the depression 15 as well. Therefore, even if there is a difference in shrinkage between the stainless steel forming the heat transfer plate and the aluminum or aluminum alloy forming the cooking vessel body 20 in the process of cooling the cooking vessel out of the mold, there is no gap.

Thereafter, the bottom surface of the cooking vessel body 20 to which the heat transfer plate is attached is exposed to the outside through surface treatment such as sand blasting.

As such, as the recessed portion 15 is formed, the contact area of the molten metal is greatly increased, and thus the bonding force between the heat transfer plate and the cooking vessel body 20 provided in the manufactured cooking vessel is improved. It is firmly fixed to (20) and will not be separated even if it is used for a long time.

In addition, another embodiment of the present invention, as shown in Figure 5, in addition to the depression 15 to the same depth as the depression 15 is formed in the main body 10 in the radial direction and connected to the depression 15 Auxiliary depression 17 is formed; further includes. At this time, the auxiliary depression 17 is formed with a depression hole 18 corresponding to the inner hole 12 and the outer hole 13.

The auxiliary depressions 17 are preferably formed up to two rows of inner holes and two rows of outer holes, and more preferably, are formed at positions including the radially long holes 13b. Accordingly, the depression hole 18 may include a radial long hole 13b.

As such, as the auxiliary depression 17 is formed together with the depression 15, the contact area of the molten metal is further increased, which acts as a factor for more firmly coupling the heat transfer plate to the cooking vessel body 20. Done. Therefore, even if the cooking vessel is used for a long time, it is possible to prevent the heat transfer plate from being separated from the cooking vessel.

Although described and illustrated with reference to some embodiments for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as described above, the scope of the technical idea described in the claims Those skilled in the art will appreciate that many modifications and variations can be made to the subject innovation without departing from the scope thereof. Accordingly, all such appropriate changes, modifications, and equivalents should be considered to be within the scope of the present invention.

10 ... body
11.Center hole
12.Inner hole
13.Outer hole
13a ... circumferential long
13b ... Radial Long Hole
15.Depression
16.Depression Holes
17.Secondary depression
18.Depression Holes
20 ... cooking container

Claims (5)

A main body 10 having a center hole 11 formed in the center thereof and having a flat surface at its bottom;
A depression 15 formed along the circumferential direction at a position spaced from the center hole 11 by a predetermined distance;
A plurality of inner holes 12 formed regularly or irregularly between the center hole 11 and the depression 15;
A plurality of outer holes 13 formed regularly or irregularly between the depression 15 and the edge of the main body 10;
Heat sink plate for induction heating cooking vessel comprising a; recessed portion holes 16 formed in the recessed portion 15 at regular intervals along the circumferential direction. The method according to claim 1,
The inner holes 12 are formed in three rows in the radial direction,
The outer hole 13 is formed in four rows in the radial direction,
The depression hole 16 is a heating plate for induction heating cooking vessels, characterized in that formed in two rows. The method according to claim 2,
The outer hole 13 is formed of four circumferential long holes 13a formed at regular intervals in the third row from the edge of the main body 10 and four locations formed by connecting the third row and the fourth row from the edge of the main body. Includes a radial long hole 13b,
Heating plate for induction heating cooking vessel, characterized in that the radially long hole (13b) is disposed between the circumferential long hole (13a). The method according to claim 1,
And an auxiliary depression 17 formed radially in the main body 10 and the same depth as the depression 15 so as to follow the depression 15.
Heat sink plate for induction heating cooking vessel, characterized in that the depression hole (18) corresponding to the inner hole (12) and the outer hole (13) is formed in the auxiliary depression (17). The method according to any one of claims 1 to 4,
Depression depth of the depression 15 is a heat transfer plate for induction heating cooking vessel, characterized in that 0.2 to 0.5 times the thickness of the main body.

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