KR200493374Y1 - Electric Plate for Induction Heating Cooker - Google Patents

Abstract

The present invention is used in induction heating cooking vessels manufactured by casting method, but by increasing the contact area of the molten metal by forming a plurality of depressions on the casting surface, adhesion with non-conductive material is improved so that it is not separated from the cooking vessel even if used for a long period It relates to a heat transfer plate for an induction heating cooking vessel,
The center hole 11 is formed in the center, the bottom surface is made of a flat portion, a plurality of through holes 12 are formed at regular intervals along the circumferential direction and the radial direction, and from a position spaced from the center hole 11 by a certain degree. It extends to the vicinity of the edge and a curved recess 13 is formed, the recess 13 is arranged in a tornado shape, and a recess hole 14 is formed at regular intervals along the recess 13 It is characterized by that.

Description

Electric Plate for Induction Heating Cooker

The present invention relates to a heat transfer plate for an induction heating cooking container that generates a magnetic field in an induction heating cooking container that cooks food by using an induction heating method. In particular, it is used in an induction heating cooking container manufactured by a casting method, but is used in a plurality of casting surfaces. The present invention relates to a heat transfer plate for an induction heating cooking container in which a concave portion is formed to increase the contact area of the molten metal, thereby improving adhesion to a non-conductive material so that it is not separated from the cooking container even if used for a long period of time.

In general, an induction range has a built-in coil for generating a magnetic field when a high voltage is applied by receiving power, and such an induction range induces a magnetic field when a high voltage is applied to the coil. It refers to a heating device that uses the principle that a metal body is heated.

Since the above-described induction stove does not generate flames or harmful gases, there is no risk of fire, and it can prevent harmful gases such as carbon monoxide, which inevitably occur when the gas is used as a heat source. It has the advantage of being able to maintain it. In addition, the induction stove has no risk of burns even if you touch the grill while the container is heating, and there is no flame, so there is no risk of fire or explosion. It has a tendency to be used a lot recently.

On the other hand, in the above-described induction stove, a conventional cooking vessel using a flame cannot be used, and in order to be magnetically induced by a magnetic field generated from the induction stove, only a cooking vessel having a bottom surface that is in contact with the grill made of a conductor may be used. , Such a cooking container is called an induction heating cooking container. The induction heating cooking vessel must have a bottom surface made of a metal containing iron (Fe), that is, a conductive metal in order to induce a magnetic field.

In other words, in the induction stove, only a cooking vessel made of a metal material capable of self-sensitization with a magnetic field generated by a high voltage can be used, and a cooking vessel made of a non-ferrous metal such as aluminum, which occupies most of the cooking vessel, or made of stoneware and ceramics. Cooking containers cannot be used. Accordingly, in order to use cooking vessels such as pots, frying pans, kettles, and pressure rice cookers in an induction stove, a heat transfer plate containing iron is attached to the bottom of the heat transfer plate body made of non-ferrous metal. It is manufactured by bonding different materials of non-ferrous metals and ferrous metals.

On the other hand, as a bonding method of different materials used in an induction heating cooking container, welding between different materials is common, but it is difficult to apply to a die casting method used in manufacturing a cooking container because it is simple and mass-producible. In other words, when using the welding method, there is a limit to the amount of production, which increases the cost. When the cooking container is produced by the die-casting method, it is difficult not only to integrate the container body and the heat transfer plate made of different materials, but even if it is integrated, the heat transfer plate falls after a certain period of time. There is a problem.

Accordingly, a method of crimping the heat transfer plate to 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 was studied. If this method is used, the heat transfer plate is firmly attached to the body of the heat transfer plate, thereby improving the durability of the product.

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

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

The induction heating cooking vessel manufacturing method of the above-described casting method is characterized in that a cooking vessel is manufactured by pouring molten aluminum on a heat transfer plate in a mold, so that the heat transfer plate and the cooking vessel body are integrally molded to reduce the risk of separation of the heat transfer plate.

However, the conventional heat transfer plate for induction heating cooking vessels has a shape that has only a number of holes perforated or has a simple protrusion around the holes, so the contact area of the molten metal is not large. There is a problem in that a gap may occur in the heating plate, and in some cases, the heat transfer plate may be separated from the cooking container body.

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

Patent Document 1, a perforation portion formed by perforating into predetermined shapes; A bent portion provided in the perforated portion and bent upwardly to be integrally attached to the container body; Consists of including a cut part formed by cutting outward from the center part, and is not inclined to one side due to the non-uniformity of the injected pressure when the non-conductive metal material that is located inside the mold and forms the container body is injected. Disclosed is a conductive plate of a cooking vessel for an induction range, so as not to be separated from the main body.

Patent Document 2 is a heat transfer plate for an induction heating cooking container used in an induction heating cooking container of a casting method in which molten metal of a non-ferrous metal is poured after being put into a cooking container manufacturing mold, and the molten metal can reach the mold surface in the body of the heat transfer plate. A plurality of holes are formed so that a plurality of holes are formed, a protrusion protruding upwardly along at least some of the holes and a locking projection protruding from the end of the protrusion toward the inside of the hole are provided, so that the contact area with the molten metal during casting By increasing this, as well as improving the coupling force with the cooking container body, there is disclosed a heat transfer plate for an induction heating cooking container so that it is not separated from the cooking container body due to the locking protrusion.

Patent Document 3 is a first step of mounting an induction heating plate on an upper surface of a pressing plate provided to be elevating and descending on a bottom surface of a mold having a cavity of a profile corresponding to the outer shape of the cooking container body and injecting molten metal; A second step of cooling the molten metal to a reaction solid state inside the mold; A third step of removing pores between the molten metal and the induction heating plate by pressing the pressurizing plate upward in a reaction solid state of the molten metal forming the outer shape of the main body; And a fourth step of opening the mold after cooling for complete solidification of the molten metal to extract and post-process the cooking container body attached to the lower surface of the induction heating plate, and prevent partial peeling of the induction heating plate to improve durability in use. Disclosed is a method of manufacturing a cooking vessel for induction by means of an induction heating plate insertion reaction and 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 problems of the prior art, and is used in an induction heating cooking vessel manufactured by a casting method, but a plurality of depressions are formed on the casting surface to increase the contact area of the molten metal, thereby increasing the contact area with the non-conductive material. It is an object of the present invention to provide a heat transfer plate for an induction heating cooking container in which adhesion is improved so that it is not separated from the cooking container even when used for a long period of time.

In the heat transfer plate for an induction heating cooking vessel of the present invention for achieving the above object, a center hole is formed in the center and a bottom surface is made of a flat portion, and a plurality of through holes are formed at regular intervals along a circumferential direction and a radial direction, and the center hole It is characterized in that the curved recessed portion is formed from a position spaced from a predetermined distance to the vicinity of the edge, and the recessed portion is arranged in a tornado shape, and recessed portion holes are formed at regular intervals along the recessed portion.

In addition, the heat transfer plate for an induction heating cooking vessel of the present invention has a center hole formed in the center portion and a bottom surface made of a flat portion, and a plurality of through holes are formed at regular intervals along the circumferential direction and the radial direction, and from the center hole in the radial direction. It is characterized in that a plurality of depressions are formed at predetermined intervals along a circumferential direction at positions spaced apart from each other, and a plurality of depressions holes are formed at predetermined intervals along a circumferential direction and a radial direction in the depression.

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

In the heat transfer plate for induction heating cooking vessels of the present invention, as a plurality of holes are formed and a plurality of depressions are formed on the casting surface, the contact area of the molten metal increases significantly during casting, and the molten metal flows into the depressions and each hole. Since it is hardened, the bonding strength with the cooking container is improved and it is firmly fixed, so that it is not separated from the cooking container even if it is used for a long period of time.

In addition, according to the heat transfer plate for an induction heating cooking container according to the present invention, the center of the cooking container and the heat transfer plate is maintained to prevent separation and deformation of the center by using a heat transfer plate having a double bottom structure including a depression. The flatness is improved, and the heat transfer by the heat transfer plate is uniformly achieved, thereby contributing to energy saving.

1 is a perspective view showing a first embodiment of a heat transfer plate for an induction heating cooking vessel according to the present invention.
Figure 2 is a partial cross-sectional view of the heat transfer plate for the induction heating cooking vessel shown in Figure 1;
3 is a perspective view showing an induction heating cooking container provided with a heat transfer plate for the induction heating cooking container shown in FIG. 1;
Figure 4 is a perspective view showing a second embodiment of the heat transfer plate for induction heating cooking vessel according to the present invention.
5 is a perspective view showing an induction heating cooking container provided with a heat transfer plate for the induction heating cooking container shown in FIG. 4;

Hereinafter, a description will be given of the heat transfer plate for an induction heating cooking vessel of the present invention with reference to the accompanying drawings.

For explaining a preferred embodiment of the present invention, FIG. 1 is a perspective view showing a first embodiment of a heat transfer plate for an induction heating cooking container according to the present invention, and FIG. 2 is a part of the heat transfer plate for an induction heating cooking container shown in FIG. 1 3 is a perspective view showing an induction heating cooking container provided with a heat transfer plate for the induction heating cooking container shown in FIG. 1, and FIG. 4 is a second embodiment of the heat transfer plate for an induction heating cooking container according to the present invention. It is a perspective view, and FIG. 5 is a perspective view showing an induction heating cooking container provided with a heat transfer plate for the induction heating cooking container shown in FIG. 4.

In the first embodiment of the heat transfer plate 10 for an induction heating cooking vessel according to the present invention, as shown in FIGS. 1 to 3, a center hole 11 is formed in the center and the bottom surface is made of a flat portion, and the circumferential direction and the radial direction A plurality of through-holes 12 are formed at regular intervals along the line, extend from a position spaced apart from the center hole 11 to the vicinity of the edge, and a curved depression 13 is formed, the depression ( 13) is arranged in a tornado shape, and is formed by forming recessed part holes 14 at regular intervals along the recessed part 13. At this time, the portion in which the recessed portion 13 is formed is formed in a shape in which the opposite side protrudes as shown in FIG. 2.

And the cooking vessel 50 provided with the heat transfer plate 10 for the induction heating cooking vessel of the present invention is formed so that the depression 13 is exposed on the bottom of the cooking vessel 50, as shown in FIG. do.

At this time, it is preferable that the depression depth of the depression 13 is 0.2 to 0.5 times the thickness of the body. That is, when the thickness of the heat transfer plate 10 is 1 mm, the recessed portion 13 is recessed to a depth of 0.2 to 0.5 mm. This means that if the depression depth of the depression 13 is less than 0.2 times the thickness of the body, the increase in the contact area of the molten metal by the depression 13 is weak, and the depression depth of the depression 13 exceeds 0.5 times the thickness of the body. This is because, as well as difficulty in processing, the bonding force in the recessed hole 14 may be weakened. In addition, by forming bridge portions (not shown) that are not depressed at regular intervals in the depressed portions 13, the molten metal for forming the cooking vessel 50 may be entangled.

In addition, as shown in Figs. 4 and 5, the heat transfer plate for the induction heating cooking vessel of the present invention has a center hole 21 formed in the center, and a bottom surface is made of a flat portion, and a plurality of heat transfer plates at regular intervals along the circumferential direction and the radial direction. A through hole 22 is formed, and at a position spaced apart from the center hole 21 by a certain degree in the radial direction, a plurality of depressions 23 are formed at regular intervals along the circumferential direction, and in the depression 23 A plurality of depression holes 24 may be formed at regular intervals along the circumferential direction and the radial direction.

And the cooking vessel 50 provided with the heat transfer plate 20 for the induction heating cooking vessel of the present invention is formed so that the depression 23 is exposed on the bottom of the cooking vessel 50, as shown in FIG. do.

At this time, it is preferable that the depression depth of the depression 23 is 0.2 to 0.5 times the thickness of the body. That is, when the thickness of the heat transfer plate 20 is 1 mm, the recessed portion 23 is formed to be recessed to a depth of 0.2 to 0.5 mm.

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

Among the molds for cooking vessels, after placing the heat transfer plates 10 and 20 on the upper side of the lower mold, the upper mold is coupled to the lower mold, and molten aluminum or aluminum alloy is injected into the mold to cast the cooking vessel 50. At this time, the heat transfer plates 10 and 20 should be placed so that the flat portion of the bottom surface is in contact with the lower mold so that the molten aluminum or aluminum alloy can be introduced into the depressions 13 and 23 formed on the upper surface.

Accordingly, the molten aluminum or aluminum alloy introduced into the mold is filled in the center hole 11, 21 and the through hole 12, 22 of the heat transfer plate 10, 20, and the depression 13 After flowing into the) (23), it is filled in the interior of the depressions 13 and 23 as well as the depression holes 14 and 24.

Therefore, even if there is a difference in shrinkage between the stainless steel forming the heat transfer plates 10 and 20 and the aluminum or aluminum alloy forming the cooking container 50 in the process of taking out the cooking vessel 50 from the mold and cooling it, a gap does not occur. Will not be. Accordingly, the center of the heat transfer plate 10, 20 and the cooking container made of aluminum or aluminum alloy are maintained in a coincident state to prevent separation and deformation of the center, and the plan view of the heat transfer plate 10, 20 and the cooking container is It all improves. Accordingly, since the heat transfer by the heat transfer plates 10 and 20 is uniformly performed, the amount of energy consumed during cooking is reduced, thereby helping to save energy.

Thereafter, the bottom surface of the cooking vessel 50 to which the heat transfer plate is attached is exposed to the outside through surface treatment such as sand blasting.

In this way, as the plurality of depressions 13 and 23 are formed in the heat transfer plates 10 and 20, the contact area between the heat transfer plates 10 and 20 and the molten metal increases significantly, so that the cooking vessel 50 The bonding force between the provided heat transfer plates 10 and 20 and the cooking container 50 is improved, and as a result, the heat transfer plates 10 and 20 are firmly fixed to the cooking container 50 so that they are not separated even if used for a long period of time. .

Although it has been described and illustrated in connection with several embodiments for exemplifying the technical idea of the present invention as described above, the present invention is not limited to the configuration and operation as described above, and the scope of the technical idea described in the claims It will be well understood by those of ordinary skill in the art that a number of changes and modifications can be made to the present invention without deviating. Therefore, all such appropriate changes and modifications and equivalents should be considered to be within the scope of the present invention.

10, 20... Heat transfer plate
11, 21... Center hole
12, 22... Through hole
13, 23... Depression
14, 24... Recessed hole

Claims (3)

The center hole 11 is formed in the center, the bottom surface is made of a flat portion, and a plurality of through holes 12 are formed at regular intervals along the circumferential direction and the radial direction,
It extends from a position spaced a certain distance from the center hole 11 to the vicinity of the edge, and a curved depression 13 is formed, the depression 13 is arranged in a tornado shape, the depression 13 Accordingly, the heat transfer plate for an induction heating cooking vessel, characterized in that the recessed portion holes 14 are formed at regular intervals. A center hole 21 is formed in the central part, the bottom surface is made of a flat part, and a plurality of through holes 22 are formed at regular intervals along the circumferential direction and the radial direction,
A plurality of depressions 23 are formed at regular intervals along the circumferential direction at a position spaced apart from the center hole 21 in the radial direction, and a predetermined interval along the circumferential direction and radial direction in the depression 23 Heat transfer plate for induction heating cooking vessel, characterized in that the plurality of recessed hole (24) is formed. The method according to claim 1 or 2,
A heat transfer plate for an induction heating cooking vessel, characterized in that the depression depth of the depression holes (14) (24) is 0.2 to 0.5 times the thickness of the body.

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