KR101776811B1 - Cooking container - Google Patents

Abstract

The present invention relates to a cooking container having excellent thermal conductivity and heat preservation property, which can shorten the cooking time by fast heat transfer and can maintain latent heat for a long time to allow various cooking to be possible and to allow cooked food to be preserved warm, when cooking food using a cooking container such as a pot, a frying pan, a grill, a pot, or an earthen pot, and in order to cook food by using a fuel intake-type heater such as a general gas range and a non-fuel intake type heater such as an electric range or an induction range, comprises a body made of first and second metal bodies having thermal conductivity superior to thermal conductivity of a heat-containing disk member, and a heat-containing disk member interposed between the metal bodies and having one or more directly-heated passage portions having lower thermal conductivity than the thermal conductivity of the metal body and formed through the upper and lower portions of the metal body, wherein the heat-containing disk member is connected with each other through press compression processing, thereby having excellent thermal conductivity and heat preservation property.

Description

[0001] COOKING CONTAINER [0002]

The present invention can shorten the cooking time by fast heat transfer when cooking food using cooking pots such as various pots, frying pans, grilles, pots and pots, maintain latent heat for a long time, And the first and second metal bodies having excellent thermal conductivity than the heat disc member so that food can be cooked by using a non-sintered type heater such as an electric range or induction range as well as an sintered type heater such as a general gas range. And a heat dissipating disk member interposed between the metal bodies and having at least one straight passage portion formed through the upper and lower portions of the metal body so as to have a lower thermal conductivity than the metal body, wherein the body and the disk member are press- To a cooking vessel excellent in heat conductivity and heat storage stability A.

[Background Art] [0002] Recently, as various foods are developed and interest in gourmets is increasing, various kinds of cooking vessels are being developed to be suitable for cooking various foods.

Particularly, food to be cooked by heating is classified into roast, steam, stew, and roast according to the type of material, heating temperature, heating time, etc., and a proper cooking method for each food is required to prepare the original taste Can,

Japanese Patent Application Laid-Open Nos. 10-2005-0086400, 10-0811228, 10-0799742, 20-0230936, 20-422826, 10-2007 -0046053, etc., various kinds of cooking vessels have been developed and used in accordance with the cooking method of food.

Most of the cooking vessels currently on the market are being developed or are being developed. The cooking vessels of the same type or types are different from each other through different kinds of materials used, different compositions and layers of the coating layer, It is specialized in the method, and has the shape of pot, frying pan, grill, pot and the like.

That is, for example, a pot is mainly used for boiling and cooking food of a stew, and a frying pan or a grill is mainly used for cooking and roasting a food of a roast or a roast, and the pot is mainly used for steam- ,

Different types of cooking vessels are used depending on the characteristics of food or the type of cooking.

For example, pots, stainless steel (SUS) pots, ceramic coating pots, pots, and the like are used as cooking vessels such as pots.

Meanwhile, according to the detailed cooking method, the characteristics of the cooking vessel may be variously changed,

Typical cooking vessels can be classified into those which are excellent in thermal conductivity and have a high heating time and can be cooked and stored at a high temperature because the heating time is excellent in heat preservation even if the cooking time is duck.

That is, an example of using a pot and a pot which takes a long time to heat but maintains a high temperature for a long time is used separately for the amount of rapid cooling after rapid heating.

However, even if the pot is heated for a long time, if the latent heat is maintained for a long time, the food can be more delicious. On the contrary, even if the pot is excellent in latent heat maintenance, the cooking time can be shortened,

As described above, since the cooking vessel with excellent thermal conductivity and the cooking vessel with excellent heat preservation have characteristics different from each other, most of the conventional cooking vessels are specialized in one of the two opposite characteristics,

Even if it is supplemented, one of the features is relatively inferior to the other features, and the needs of the user are not sufficiently satisfied.

Accordingly, there is a need for interest and development of a cooking container which is easy to manufacture and can be purchased at a relatively low price, which is excellent in both heat conductivity and heat preservation, which are contradictory to each other.

Accordingly, the present invention has been made to solve the above-mentioned problems,

It is possible to maintain the latent heat for a long period of time after heating and to have a good thermal conductivity and to shorten the cooking time and to maintain the cooked food at the optimum temperature to the maximum regardless of the type of food or the cooking method, A body made of first and second metal bodies which are capable of cooking various kinds of foods and are excellent in taste of cooked food and having thermal conductivity higher than that of the heat disc member; There is provided a cooking vessel which comprises a heat disc member having at least one straight passage portion formed in a lowered state and which has a lower ductility and which is superior in thermal conductivity and heat preservation, The purpose.

According to the present invention, since the body and the metal disk are press-bonded to each other through a press-bonding process, they can be easily manufactured and durability can be ensured, and the body and the disk- And a bending portion projecting upwardly or downwardly or upwardly and downwardly along the rim of the straight passage portion is provided on the horn disk member so that a height is formed on the upper surface or the lower surface or the upper and lower surfaces of the main body through press- Another object of the present invention is to provide a cooking vessel having a bottom portion of a concavo-convex structure formed differently, and excellent in thermal conductivity and thermal integrity.

Further, the present invention is characterized in that the heat disc member comprises a first disc plate and a second disc plate stacked vertically so that the thickness of the bottom of the main body can be made relatively thick, and the heat conductivity and the heat preservation are further improved. The disc plate is provided with an upper bending portion and a lower bending portion which are projected upward and downward along the rim of the straight passage portion so as to have bottom portions of concavo-convex structures formed on the upper and lower surfaces of the main body through press- It is an object of the present invention to provide a cooking vessel excellent in thermal conductivity and thermal integrity.

In addition, the present invention facilitates the air discharge between the metal bodies during the press-pressing process so that the metal bodies and the disk plates are more closely adhered to each other to further improve thermal conductivity and heat retention, and to facilitate the appearance finish for forming the coating layer And a flange portion provided along a rim of each metal body and having a discharge hole for discharging internal air at the time of pressing the press on one of the flange portions, the container being excellent in thermal conductivity and thermal integrity The purpose.

In order to achieve the above object, a cooking vessel according to the present invention comprises:

A body formed by stacking a first metal body and a second metal body made of a metal having higher thermal conductivity than the iron disk member; And

And a heat dissipation disk member interposed between the first metal body and the second metal body, the heat dissipation disk member being made of a metal having a thermal conductivity lower than that of the metal bodies,

And the main body and the heat radiating disc member are coupled to each other through a pressing process.

In the cooking vessel according to the present invention,

Wherein the heat disc member comprises:

The first disk plate and the second disk plate are stacked one on the other,

Each disk plate is provided with an upper bending portion and a lower bending portion which are projected upward and downward along the rim of the straight passage portion,

And a bottom portion of a concavo-convex structure having different heights is formed on the upper and lower surfaces of the main body through press-pressing.

Further, in the cooking vessel according to the present invention,

The heat radiating disc member includes a bent portion protruding upwardly or downwardly or upwardly and downwardly along the rim of the straight passage portion,

A bottom portion of a concavo-convex structure having different heights is formed on the upper surface, the lower surface, or the upper and lower surfaces of the main body through press-pressing.

In addition, in the cooking vessel according to the present invention,

Wherein the first metal body and the second metal body each include a flange portion extending outward along a rim,

One of the flange portions is provided with a discharge hole formed so as to pass through the upper and lower portions so as to discharge the inner air during the press-pressing process.

 The cooking vessel according to the present invention includes a main body made of first and second metal bodies having relatively high thermal conductivity and a heat dissipating portion formed in a heat dissipating disk member built in the main body and having a relatively low thermal conductivity, The heating time can be shortened, heat can be stored in the heat disc member, the heat storability can be enhanced, and latent heat can be maintained for a long time,

The main body and the disk member are joined to each other through a press-pressing process to improve durability, and a concave-convex structure having a different height is formed on the bottom portion of the main body, so that various foods can be easily and conveniently cooked, Sustainable,

The entire outer surface of the body can be coated with the ceramic coating layer, so that the food can be cooked using the non-sphere type heater such as the electric range or the induction range as well as the sphere type heater such as the general gas range,

The air discharge holes are provided in one of the flanges of the metal bodies to improve the adhesion between the body and the disk disk members and to further improve thermal conductivity and heat preservation,

It can be used as various kinds of cooking vessels such as various pots, frying pans, grills, pots and pots.

1 is an exploded perspective view of a cooking vessel according to the present invention;
Fig. 2 is a longitudinal sectional view of Fig. 1; Fig.
3 is a longitudinal sectional view schematically showing a state in which the cooking vessel according to the present invention is pressed and press-worked.
FIG. 4 and FIG. 5 are photographs respectively showing upper and lower surfaces of a sample bottom portion of a cooking vessel according to the present invention. FIG.
6 is a view for explaining a rotation preventing fixing means of a multi-layer disk plate according to the present invention.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the digits of the tens and the digits of the digits, the digits of the digits, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

 In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

In describing the cooking vessel excellent in thermal conductivity and heat preservation according to the present invention, for the sake of convenience, when an unambiguous approximate direction reference is specified with reference to FIG. 1 and FIG. 3, a direction in which gravity acts is a downward direction The directions are specified in accordance with these standards unless otherwise specified in the detailed description of the invention and the scope of claims relating to other drawings.

Hereinafter, a cooking vessel according to the present invention will be described with reference to the accompanying drawings.

The present invention can be applied to various kinds of cooking vessels such as various pots, frying pans, grills, pots and pots, and can be used as a cooking vessel in which the heat conductivity and heat preservation With regard to this excellent cooking vessel,

1 to 3, the cooking apparatus according to the present invention includes a main body F that forms an outer appearance of a cooking vessel, a heat dissipating disk member D built in the main body F, And a coating layer (C).

The main body F is formed by vertically stacking a first metal body 10 and a second metal body 20 having higher thermal conductivity than the thermal disk member D. The metal body 10 ) Are generally metal materials having a relatively high thermal conductivity among metals and alloys, typically copper (copper alloy with nickel and / or zinc added to copper), and the like.

The first and second metal bodies 10 and 20 have flat first and second bottom portions 11 and 21 and a plurality of first and second bottom portions 11 and 21 on the outer sides of the first and second bottom portions 11 and 21, The first and second sidewall portions 12 and 22 are integrally formed with the first and second sidewall portions 12 and 22. The first and second sidewall portions 12 and 22 extend outward along the rim of the first and second sidewall portions 12 and 22. [ 2 flange portions 13 and 23 are provided.

The main body F is formed such that the lower second metal body 20 is formed entirely larger than the upper first metal body 10 so that the first metal body 10 is accommodated in the second metal body 20 And are stacked one above the other.

Particularly, the first metal body 10 has the skirt portion 14 bent downward at the upper end of the first side wall portion 12 and connected to the lower end of the skirt portion 14 by the first flange portion 13 Are bent outwardly and connected,

The first flange portion 13 is supported on the second flange portion 23 so that the first and second bottom portions 11 and 21 are supported by the second flange portion 23 when the first and second metal bodies 10 and 20 are stacked, A space in which the recording disk member D is accommodated is formed,

The inner space S between the metal bodies 10 and 20 generated in the skirt portion 14 is pressed by the lateral pressure to press the first and second side wall portions 12 and 22 in the press- Are formed in close contact with each other.

Although the outer shape of the main body F is shown in the form of a pot or a pot, it may be deformed into a shape such as a frying pan, a grill, or a pot, depending on the size and shape of the bottom, the height of the side wall,

The main body F of the present invention is characterized in that the heat applied to the second metal body 20 is rapidly transferred to the first metal body 10 due to the characteristics of the material having excellent thermal conductivity, The heat applied to the second bottom portion 21 is directly transmitted to the first bottom portion 11 through the straight heat passing portions 31 and 41 by the straight heat passing portions 31 and 41 of the first and second heat sinks D, The heating time can be shortened.

4 and 5, patterns of various shapes are formed on the outer surface of each of the metal bodies 10 and 20 so as to be engraved or embossed so that the outer surface of the body F is coated with the coating layer C, It is possible to form a concavo-convex structure by a pattern shape.

1 to 3, the heat disc member D is interposed between the first metal body 10 and the second metal body 20 and includes a metal body 10 And the heat transfer disk member D is made of a metal having a relatively high thermal conductivity among ordinary metals or alloys. The heat transfer disk member D is made of a metal having low thermal conductivity, A metal material having a low (i.e., high heat preservation) property, typically, stainless steel (SUS) or the like may be used.

The heat dissipating disc member D has a flat plate shape corresponding to the bottoms 11 and 21 of the metal bodies 10 and 20 and has a plurality of straight passing portions 31 and 41 of various shapes, .

Although the shape, number, and arrangement of the straight passage portions 31 and 41 are not limited, it is preferable that one of the central through holes 32 and 42 And a plurality of circumferential through holes 33 and 43 radially disposed around the central through holes 32 and 42 so that the heat of the second bottom portion 21 is transmitted to the first bottom portion 21, So that it can be uniformly distributed to the entire body 11.

The heat disc member (D) of the present invention can retain latent heat for a long time by preserving the heat absorbed between the metal bodies (10) (20) due to the characteristics of the material having low thermal conductivity and excellent heat resistance. The efficiency of heat transfer between the first and second bottom portions 11 and 21 due to the heat generating disk member D can be improved by the heat transfer through the straight heat passing portions 31 and 41 of the heat exchanging disk member D By the direct delivery of heat, the latent heat can be maintained simultaneously while shortening the heating time.

Next, the present invention is characterized in that, in a state in which the arm member D is interposed between the first and second metal bodies 10 and 20, the body F and the arm member D Lt; / RTI >

At this time, the flange portions 13 and 23 may be bolted to each other,

In order to form the coating layer C, the first and second flange portions 13 and 23 are made to have different lengths in the left and right direction. Then, during the pressing process, the rivet portion of the longer flange portion It is more preferable to bend and rivet it.

The air in the internal space S formed by the heat radiating disk member D and the skirt portion 14 is discharged to the outside so that the first and second metal bodies 10 and 20 are in close contact with each other At least one of the flange portions (13) (23) is provided with one or more discharge holes (23a) formed so as to be vertically penetrated.

In this case, the first flange portion 13 provided on the upper first metal body 10 is made longer than the second flange portion 23 provided on the lower second metal body 20, and the downwardly bent rivet A discharge hole 23a is formed in the second flange portion 23,

The rivet portion 13a of the first flange portion 13 is bent inward so that the first flange portion 13 or the rivet portion 13a covers the discharge hole 23a of the second flange portion 23 It is more advantageous to coat the entire outer surface of the main body F with the coating layer C while designing the overall appearance of the main body F to be more neat by not subjecting the discharge hole 23a to the outside by riveting.

Next, as shown in FIGS. 1 to 3, the inventive disc member D may be a multi-layer structure in which two disc plates 30 and 40 are laminated,

Or may not be shown in the drawings, but may be a single layer structure consisting of one single disc plate.

First, the two-layer structure of the heat-generating disc member (D)

The first disk plate 30 and the second disk plate 40 are stacked one on the other,

Each of the disk plates 30 and 40 is provided with an upper bending portion and a lower bending portion which are projected upward and downward along the rim of each of the straight passage portions 31 and 41.

That is, the first disk plate 30 is bent upwardly along the rims of the first central through hole 32 and the first peripheral through hole 33 constituting the first straight passage portion 31, A 1-1 bending projection 32a and a 1-2 bending projection 33a to form an upper bending portion,

The second disk plate 40 is provided with a second through hole 42 and a second through hole 43 which constitute the second straight passage portion 41. The second disk plate 40 includes a second through hole 42 and a second through hole 43, 1 folding protrusion 42a and a 2nd-2 folding protrusion 43a, and a lower bent portion is formed.

These bending protrusions are formed by bending the perimeter of the through-hole as the upper and lower sides are dried while piercing the through-holes.

Therefore, when the main body F and the armature disk member D are press-pressed,

The bending projections 32a, 33a, 42a and 43a are pressed on the first and second bottom portions 11 and 21 on the upper and lower sides to press the corresponding portions of the bottom portions 11 and 21 upward and downward And at the same time,

The first and second bottom portions 11 and 21 which are in contact with the respective through holes 32, 33, 42 and 43 are formed such that the corresponding portions are located inside the through holes 32, 33, 42 and 43 And is finely concaved upward and downward,

On both sides of the bottom portion of the main body F, a concave-convex structure having different heights is formed.

When the bottom surface of the bottom portion of the main body F, that is, the top surface of the first bottom portion 11 and the bottom surface of the second bottom portion 21 have a concavo-

The concave portions 11a and 21a recessed by the through holes 32, 33, 42 and 43 are brought into direct contact with the first and second bottom portions 11 and 21, Lt; / RTI >

The convex portions 11b and 21b protruded by the bending projections 32a, 33a, 42a and 43a are formed in such a manner that the bending projections 32a, 33a, 42a and 43a, So that the metal bodies 10 and 20 and the first and second disk plates 30 and 40 are firmly brought into tight contact with and bonded to each other,

The bending protrusions 32a, 33a, 42a and 43a form a micro air layer between the through holes 32, 33, 42 and 43 to provide an effect of further improving heat storage efficiency do.

The concavo-convex structure of the first bottom portion 11 can function as a grill when cooked in the case of increasing the height difference between the concave portion 11a and the convex portion 11b, 1 can be prevented from being pressed against the bottom part 11. [

At this time, when the main body F and the disk member D are press-pressed, a portion of the first and second bottom portions 11 and 21 contacting the first and second central through holes 32 and 42 The dome portion 11A protruding upward from the center of the bottom of the main body F is formed so that the heating efficiency with respect to the central portion where the heat source of the firebox is not directly contacted can be improved.

The first and second disc plates 30 and 40 are formed with edge bending protrusions 30a and 40a bending upward and downward along the outer edge, Can be formed.

Subsequently, a single-layered architected disk member D, which is not shown in the figure,

And a bent portion protruding from the upper or lower side or the upper and lower sides along the rim of the straight passage portion.

That is, the single disk disk D having a single-layer structure is a single disk disk in which any one of the first and second disk plates 30 and 40 having a multi-layer structure is used, and any one of the upper bend or the lower bend Or both of the upper and lower bent portions.

Therefore, during the pressing process of the main body F and the disk member D, the bottom portion of the concavo-convex structure having different heights is formed on the upper surface, the lower surface or the upper and lower surfaces of the main body F, The effect is as described above.

This single disk disk member D having a single layer structure is advantageous in reducing the thickness of the bottom portion of the main body F. [

In this case, when the upper and lower bending portions are provided on the single disk plate, the upper bending portion (or the lower bending portion) is formed by bending the through holes and the bending protrusions are formed, and the lower bending portion (or the upper bending portion) Can be formed by attaching a separate metal member to the shape of each through hole by welding or the like.

3, a coating layer C is formed on the outer surface of the main body F in which the iron disk member D is press-pressed between the metal bodies 10 and 20.

The coating layer C is formed by thermally fusing the coating liquid on the outer surface of the main body F through heating in a state where the coating liquid is applied to the outer surface of the main body F having been pressed and pressed to a predetermined thickness, The coating liquid, that is, the coating layer (C) is more preferably made of a ceramic material.

The ceramic material forming the coating layer (C) may include various ceramic materials that emit far-infrared rays, for example, known ceramic materials such as zeolite, germanium, elvan, jade, loess,

Such a coating layer (C) can prevent food and beverage from sticking to the bottom when cooked, especially when cooked.

Further, when the ceramic coating layer is coated on the entire outer surface of the main body, when the food is cooked using a non-sintering type heater such as an electric range or an induction range as well as an sintered type heater such as a general gas range, In particular, when the cooking is performed in the induction range, the cooking vessel is heated in response to the heating portion of the induction range.

1 to 3, when the bottom portion of the cooking vessel is circular, the main body F and the heating disk member D may be fixed at their fixed positions,

The disk disks 30 and 40 of the disk disk member D are pressed by pressing the disk plates 30 and 40 in the respective pressing holes 32 and 33 ) 43 are not positioned on the same line,

The direct heat transfer function using the straight passage portions 31 and 41 may be lost or the concave and convex structure of the bottom portions 11 and 21 may not be formed.

As shown in FIG. 6, rotation preventing fixing means of the multi-layer disc plates 30 and 40 were introduced.

The fixing means of the present invention is for fixing the disc plates in a state in which the first disc plate 30 and the second disc plate 40 are laminated,

The through holes 32, 33, and 42 are protruded outward from the respective outer edge of the first and second disc plates 30 and 40 (more precisely, the edge bending protrusions 30a and 40a) At least one first locking protrusion 35 and a second locking protrusion 45 which are in contact with each other at a position where the first locking protrusions 43 align with each other,

One of the engaging projections 35 and 45 is connected to a bent portion formed longer than the other engaging projections,

The bending portion is bent while enclosing the short-length locking protrusion to fix the disc plates 30 and 40.

At this time, one of the locking projections (35) and (45) is projectingly connected to the upper or lower side so as to be in contact with the other locking projection.

In Fig. 6, the bending portion 45a of the second locking projection 45, which is longer than the first locking projection 34, can be identified, and the opposite structure is also possible.

Therefore, when the disk plates 30 and 40 are stacked and the locking projections 35 and 45 are rotated so as to be in contact with each other, the through holes 32, 33, 42 and 43 are aligned in position ,

In this state, when the bending portion 45a is bent so that the first locking protrusion 45 is fitted and fixed between the second locking protrusion 45 and the bending portion 45a, the disc plate 30 (40) So that it is possible to prevent the disc plates 30 and 40 from being displaced during the press-pressing process.

Although not shown in the drawings, the present invention can be applied to a cooking utensil such as a lid covering the upper opening of the main body F or a handle for facilitating the handling of the main body F, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, and variations and modifications may be made without departing from the scope of the invention. Modifications, alterations, and substitutions are to be construed as falling within the scope of protection of the present invention.

F: Main body D: Arrays disk member
C: Coating layer
10, 20: metal body 11, 21: bottom part
11a, 21a: recesses 11b, 21b:
12, 22: side wall portions 13, 23: flange portion
13a: rivet portion 23a: exhaust hole
14: skirt portion 30, 40: disk plate
31, 41: straight passage portion 32, 42: central through hole
33, 43: perforation holes 32a, 42a, 33a, 43a: bending projections
30a, 40a: edge bending projections 35, 45:
45a:

Claims (4)

A main body F formed by vertically stacking a first metal body 10 and a second metal body 20 made of a metal having higher thermal conductivity than the iron disk member D; And
And at least one straight passing portion 31 formed between the first metal body 10 and the second metal body 20 and made of a metal having a lower thermal conductivity than the metal bodies 10 and 20, (41), wherein the disc-shaped disc member (D)

The main body F and the heat disc member D are coupled to each other through the pressing process so that the bottom portion 11 of the metal bodies 10 and 20 21 are in contact with each other,
The first metal body (10) and the second metal body (20) each include flanges (13, 23) extending outward along the rim,
The second flange portion 23 of the lower second metal body 20 is provided with a discharge hole 23a formed so as to pass through the upper and lower portions so as to discharge the internal air during press- ) 20 are in close contact with each other,
The first flange portion 13 of the upper first metal body 10 is longer than the second flange portion 23 of the lower second metal body 20 to form a downwardly bent rivet portion 13a,
The rivet portion 13a of the first flange portion 13 is bent inward so that the rivet portion 13a covers the discharge hole 23a of the second flange portion 23, Is not exposed to the cooking cavity.
The method according to claim 1,
The heat-generating disk member (D)
The first disk plate 30 and the second disk plate 40 are stacked one on the other,
Each of the disk plates 30 and 40 is provided with an upper bending portion and a lower bending portion protruding upward and downward along the rim of each of the straight passage portions 31 and 41,

Wherein a bottom surface of a concavo-convex structure having different heights is formed on the upper and lower surfaces of the main body (F) through press-pressing.
The method according to claim 1,
The heat dissipating disk member D includes a bending portion protruding upwardly or downwardly or upwardly and downwardly along the rim of the straight passage portions 31 and 41,

Wherein a bottom surface of a concavo-convex structure having different heights is formed on the upper surface, lower surface, or upper and lower surfaces of the main body (F) through press-pressing.
3. The method of claim 2,
And a fixing means for preventing rotation of the multilayer disk plate to fix the disk plates (30) and (40) in a state where the first disk plate (30) and the second disk plate (40)
Wherein,
The first and second disc plates 30 and 40 are connected to each other by protruding outward from each outer edge of the first and second disc plates 30 and 40 so that the one or more first interlocking members 31 and 41, And a second locking protrusion 45,
One of the locking projections 35 and 45 is connected to a bent portion formed longer than the other locking projections,
The bending portion is bent while wrapping the short-length locking protrusion so that the disc plates 30 and 40 are fixed,
Wherein one of the engaging projections (35) and (45) is protrudingly connected to the upper or lower side so as to be in contact with the other engaging projection.

Images