JP6029224B2 - Electromagnetic cooker - Google Patents

Description

  The present invention relates to an electromagnetic cooker made of nonmagnetic material such as aluminum or aluminum alloy heated by an electromagnetic induction heater.

  2. Description of the Related Art Conventionally, there is known an electromagnetic induction heater that heats cooking utensils such as a frying pan and a pan by electromagnetic induction heating (referred to as IH from the acronym of Induction Heating). Cooking utensils such as frying pans and pans used in this electromagnetic induction heater are generally referred to as electromagnetic cooking utensils. The metal plate generates heat by electromagnetic induction, the heat is conducted to the instrument body, and the entire instrument is heated. In recent years, combined with the popularity of all electrification, this electromagnetic cooker has been widely used.

And what was devised variously as this electromagnetic cooking appliance is known.
For example, in Patent Document 1, the structure of the bottom wall of an aluminum alloy container body has a three-layer structure of a magnetic metal plate embedded inside and an aluminum layer covering both surfaces of the magnetic metal plate. There is disclosed a structure in which a slit for dividing the outer bottom surface side aluminum layer is provided on the outer bottom wall surface, and a magnetic metal plate embedded from the bottom of the slit is exposed.

  In Patent Document 2, a heating element 5 made of a magnetic material is composed of eight divided plates 6, and these divided plates 6 are joined to the bottom surface of a pot body 2 made of a non-magnetic material. An IH cooking pan 1 arranged in a circle on the bottom surface is disclosed.

  Patent Document 3 is a metal plate 40 fixed to the outer surface of the bottom portion of the cooking container 30, and the metal plate 40 has a diameter of 30 mm or more and less than 70 mm with the approximate center of the bottom portion 31 of the cooking container 30 as the center. What is arrange | positioned by the annular area | region surrounding the circular area | region of this is disclosed.

  Patent Document 4 discloses a cooking utensil for an electromagnetic cooker in which a magnetic material is embedded by exposing one surface to the bottom of an aluminum alloy electromagnetic cooking utensil, and the magnetic material includes an outer band-shaped member and an inner band-shaped member. A fan-shaped perforated disk-shaped body comprising a member, a radial connecting member for connecting both belt-like members between the end portions thereof, and a sealed space surrounded by the inner and outer belt-like members and the connecting member. There has been disclosed a structure in which some of the perforated discs are integrated and embedded with an aluminum alloy in the sealed space of the perforated discs and the periphery thereof.

  Further, Patent Document 5 provides a laminated portion at the bottom of the main body portion of the cooking container for heating, and forms a plurality of exposed portions in which the material of the main body portion is exposed in the laminated portion, and the plurality of exposed portions are for heating. What formed the superposition | polymerization part superposed | polymerized planarly over the fixed range of equidistance from the bottom face center part of a cooking vessel is disclosed.

Japanese Patent No. 2558429 JP 2001-203070 A Japanese Patent Laid-Open No. 2005-205196 JP 2006-122410 A Utility Model Registration No. 3111695

  By the way, in the conventional electromagnetic cooking appliance, since the center part of the bottom wall of a cooking appliance main body deform | transforms in thickness direction by heating, it is important to control the deformation | transformation of the thickness direction of the bottom wall.

  That is, when the electromagnetic cooking utensil is placed on a heater, it is generally formed by projecting the central portion of the bottom wall of the utensil upward in the thickness direction so that the appliance does not wobble on the heater. In particular, according to the current SG standard, the protruding height of the bottom wall (the distance from the top surface of the heater to the center of the bottom wall of the appliance) when not heated is the diameter of the bottom wall of the cooking appliance x 0.6% or less. It is required to manufacture as follows.

  When the cooking device is heated by a heater, the conventional electromagnetic cooking device is deformed so that the central portion of the bottom wall protrudes further upward in the thickness direction and is separated from the top plate of the electromagnetic induction heater. It was. In particular, according to the SG standard, it is required to manufacture so that the protruding height of the bottom wall is not more than 0.5% of the diameter of the bottom wall of the cooking utensil during heating.

  For this reason, it has been a problem to control the deformation in the thickness direction of the bottom wall of the electromagnetic cooking appliance so that it passes the SG standard not only when heating but also when heating.

  The present invention has been made in view of the above-described problems, and can easily control the deformation in the thickness direction of the bottom wall of the instrument body during heating, and thus can be stably heated. The purpose is to provide an electromagnetic cooker.

  In order to achieve the above object, the present invention is an electromagnetic cooking appliance comprising an appliance main body made of a non-magnetic material and a metal plate made of a magnetic material joined to a bottom wall of the appliance main body. The central portion of the bottom wall gently protrudes upward in the thickness direction when not heated, and the metal plate is arranged in a state of being divided or substantially divided in the circumferential direction of the instrument body The linear groove part is formed in the back surface side or use surface side of the bottom wall of the said instrument main body, It is characterized by the above-mentioned. According to this, about the deformation | transformation of the thickness direction of the bottom wall of the appliance main body at the time of a heating, it can control so that the said deformation | transformation amount may be 0.5% or less of the diameter of the bottom wall of a cooking appliance.

  The groove is formed on the surface of the divided metal plate on the back surface side of the bottom wall of the instrument body, or formed across the surface of the divided metal plate on the back surface side of the bottom wall of the instrument body, It is good to form linearly along the clearance gap between division | segmentation metal plates, or to form on the connection part of the said division | segmentation metal plate adjacent. Furthermore, the 2nd groove part may be formed in the peripheral part of the bottom wall of the said instrument main body.

  Further, the metal plate is divided or substantially divided in a circumferential direction of the instrument main body, a first divided metal plate formed in a mode extending in a radial direction from a peripheral part to a center part of the instrument main body, You may be comprised from the several 2nd division | segmentation metal plate arrange | positioned along with the circumferential direction of the said instrument main body in the state which opened the center part.

  According to the present invention, the deformation in the thickness direction of the bottom wall of the appliance body during heating can be controlled so that the amount of deformation is equal to or less than the diameter of the bottom wall of the cooking appliance x 0.5%. For this reason, when cooking using this cooking utensil, it becomes possible to heat stably.

It is sectional drawing of this instrument which concerns on 1st Embodiment. It is the top view seen from the bottom side of this instrument concerning a 1st embodiment. It is the top view seen from the bottom side of this instrument concerning a 2nd embodiment. It is the top view seen from the bottom side of this instrument concerning a 3rd embodiment. It is the top view seen from the bottom side of this instrument concerning a 4th embodiment. It is the figure which showed an example of the position which can form a groove part in this instrument. It is the top view seen from the bottom side of this instrument concerning a 5th embodiment. It is the top view seen from the bottom side of this instrument concerning a 6th embodiment. It is the top view seen from the bottom side of this instrument concerning a 7th embodiment. It is the top view seen from the bottom side of this instrument concerning an 8th embodiment. It is the top view seen from the upper side of this instrument concerning a 9th embodiment. It is the structure schematic for showing the dimension of this instrument. It is a figure which concerns on the product photograph which shows the Example of a conventional instrument. It is a figure which concerns on the product photograph which shows the Example of this instrument. It is a figure which concerns on the product photograph which shows the other Example of this instrument.

  Next, the electromagnetic cooking appliance (henceforth this appliance) which concerns on embodiment of this invention is demonstrated.

  FIG. 1 is a cross-sectional view of the instrument according to the first embodiment, and FIG. 2 is a plan view of the instrument as seen from the bottom side.

  This instrument is a frying pan having a circular shape in a plan view that is placed on a top plate of an electromagnetic induction heater (IH) (not shown) and heated by electromagnetic induction.

  In general, an induction coil is spirally disposed below a top plate of an electromagnetic induction heater, and a high-frequency current generator is disposed below the induction coil. When a high-frequency current is supplied from the high-frequency current generator to the induction coil, magnetic field lines are generated so as to cross a metal plate 200 (to be described later) of the instrument, and an eddy current is generated inside the metal plate 200. The eddy current is converted to Joule heat, so that the metal plate 200 generates heat and heats the instrument.

  As shown in FIGS. 1 and 2, the instrument includes an instrument body 100 made of a nonmagnetic material such as an aluminum alloy, a copper alloy, a magnesium alloy, or a ceramic. The instrument main body 100 is generally formed into a vessel shape having an opening diameter of 260 mm and a depth of 60 mm, for example, and is generally formed by press molding from a single plate. However, in the case of ceramic, it is performed by another forming method.

  Moreover, the center part of the instrument main body 100 is formed so as to protrude upward in the thickness direction when not heated. The protruding height at this time is preferably 0.6% or less of the diameter of the bottom wall of the instrument body 100 so as to conform to the SG standard. Thus, by projecting upward in the thickness direction during non-heating, the device can be stably placed on the top plate of the electromagnetic induction heater. In addition, since the protrusion height is actually very low, the protrusion height is not expressed in FIG.

  A metal plate 200 made of a magnetic material such as iron or magnetic stainless steel is joined to the bottom wall of the instrument main body 100 over almost the entire surface. In joining, generally, without using an adhesive or the like, the bottom wall of the instrument body 100 and the metal plate 200 are joined together by press working. However, in the case of ceramic, another bonding method is used.

  As shown in FIG. 2, the metal plate 200 is equally divided into eight substantially fan-shaped divided metal plates 210 along the circumferential direction of the instrument body. These divided metal plates 210 are arranged at equal intervals along the circumferential direction of the instrument body 100, and eight linear gaps 220 extending in the radial direction are formed between the divided metal plates 210. Yes.

  This substantially divided means not a state in which each divided metal plate 210 is completely divided, but a state in which each divided metal plate 210 is connected in the vicinity of the peripheral portion or the central portion of the instrument main body 100. In the present embodiment, the divided metal plates 210 are alternately connected along the circumferential direction of the instrument main body 100 via the connecting portions 230 and 240.

  Each divided metal plate 210 is provided with a plurality of small holes 250 having a diameter of 4 mm over the entire surface. The small holes 250 are intended to ensure that the burrs of the small holes 250 are indented into the bottom wall of the appliance main body 100 during bonding, and are also used in conventional electromagnetic cooking appliances.

  Further, linear groove portions 310 and 320 are formed on the instrument main body 100 in the five gaps 220 among the eight gaps 220 of the adjacent divided metal plates 210. More specifically, a linear groove 310 is formed between each of the two diagonal gaps 220 on the upper side and the lower side in FIG. 2, and one vertical gap 230 on the lower side in FIG. A slightly long linear groove 320 is formed between the two.

  The linear groove is formed, for example, with a width of 2.0 to 3.0 mm, a depth of 0.5 to 1.2 mm, and a length of 35 to 65 mm. A method for forming the linear groove portions 310 and 320 is not particularly limited, and examples thereof include a method such as stamping and cutting.

  Thus, when the appliance is heated by the electromagnetic induction heater, the metal plate 200 generates heat according to the principle of electromagnetic induction heating described above, and the heat is conducted to the appliance main body 100 to heat the entire appliance main body 100. At this time, although stress is applied to the instrument main body 100 and the metal plate 200 by heating, the central portion of the bottom wall of the instrument main body 100 does not greatly deform in the thickness direction, and the bottom wall of the instrument main body 100 conforms to the SG standard. It becomes 0.5% or less of the diameter.

  The reason why the amount of deformation in the thickness direction of the bottom wall of the instrument body during heating can be controlled to be small is considered as follows.

  First, since the instrument main body 100 and the metal plate 200 are two-dimensional structures on a plane, the expansion coefficient becomes the square of the expansion coefficient of the linear one-dimensional structure when heated. It will expand in two dimensions. However, when the linear groove portions 310 and 320 are formed as in the present invention, the portion surrounded by the linear groove portions 310 and 320 becomes a state close to a one-dimensional structure, and its expansion is also reduced to a one-dimensional structure. .

  Second, at the initial stage of heating, the resistance of the instrument main body 100 is low, and the metal plate 200 is stretched relatively smoothly, so that it is pulled to the heating side (top plate side). Thereafter, when heat is conducted from the metal plate 200 to the instrument main body 100, the metal plate 200 resists so that the instrument main body 100 does not stretch too much, and finally the overall elongation can be suppressed.

  Thirdly, the linear groove portion becomes a stress absorbing portion of the instrument main body 100 and the metal plate 200, and the swelling of the central portion of the instrument main body 100 can be suppressed.

  FIG. 3: is the top view which looked at this instrument which concerns on the 2nd Embodiment of this invention from the bottom side.

  In this embodiment, the divided metal plate of the instrument of FIG. 1 is completely divided into four. That is, among the eight divided metal plates, the outer connecting portions 230 in FIG. 2 are completely separated. As a result, a set of two divided metal plates 210 are completely divided and are arranged at equal intervals along the circumferential direction of the bottom wall. In the same manner as in the first embodiment, among the eight gaps 220 of the divided metal plate, the five gaps 220 (the lower three and the upper two in FIG. 2) are linear on the instrument body 100. Groove portions 310 and 320 are formed.

  FIG. 4: is the top view which looked at this instrument which concerns on the 3rd Embodiment of this invention from the bottom side.

  In this embodiment, the linear groove part 330 of this instrument of FIG. 1 is added also to the outer peripheral part. That is, two linear grooves 330 are formed along the circumferential direction at the peripheral edge of the bottom wall of the instrument body 100 and outside the lowermost divided metal plate 220. The two linear groove portions 330 are formed to have the same length as the outer periphery of the divided metal plate 220, and the width and depth thereof are the same as those of the five linear groove portions 310 and 320.

  FIG. 5: is the top view which looked at this instrument which concerns on the 4th Embodiment of this invention from the bottom side.

  In the present embodiment, the shape of the divided metal plate 200 of the instrument of FIG. 1 is changed. That is, the metal plate 200 is divided or substantially divided in the circumferential direction of the instrument main body 100 and the first divided metal plate 250 formed in a mode extending in the radial direction from the peripheral part to the central part of the instrument main body 100, It is composed of a plurality of second divided metal plates 260 and 270 arranged side by side in the circumferential direction of the instrument body 100 with the central part of the instrument body 100 open. Then, four linear groove portions 340 are formed along the gap 220 in the gap 220 between the adjacent second divided metal plates 250 and 260.

  FIG. 6 shows an example of a position where the linear groove portion can be formed in the present instrument.

  As shown in FIG. 6, the linear groove portions 310 and 350 are formed in the gap 220 of the divided metal plate 210 that is substantially divided. The linear groove 320 is formed in the gap 220 of the divided metal plate 210 that is completely divided. The linear groove portions 360 and 370 are formed at the connecting portions of the divided metal plates 210 that are substantially divided. As described above, the linear groove portion may be formed at any position as long as it is the gap 220 between the divided metal plates 210. The connecting portions 230 and 240 of the divided metal plate 210 that are substantially divided are not strictly the gap 220, but are between the divided metal plates and on the extension of the gap 220. Therefore, in the present invention, the connecting portions are also the gap 220. It is defined as one of

FIG. 7: is the top view which looked at this instrument concerning the 5th Embodiment of this invention from the bottom side.
In this embodiment, the groove part 381 is formed in the surface of the division | segmentation metal plate 210 in the back surface side of the bottom wall of the said instrument main body. The metal plate 200 in this embodiment is composed of eight divided metal plates 210 alternately connected in the vicinity of the outer peripheral portion and the central portion of the instrument main body, and since all the divided metal plates 210 are connected, O It is called a mold metal plate. And the linear groove part 381 is formed in the aspect extended in radial direction in the surface of the three division | segmentation metal plate 210 among these division | segmentation metal plates 210. As shown in FIG.

FIG. 8: is the top view which looked at this instrument concerning the 6th Embodiment of this invention from the bottom side.
In this embodiment, the groove part 382 is formed in the surface of the division | segmentation metal plate 210 in the back surface side of the bottom wall of the said instrument main body. In the metal plate 200 according to the present embodiment, eight divided metal plates 210 are alternately connected in the vicinity of the outer peripheral portion and the central portion of the instrument main body, and at one place of the adjacent divided metal plates 210 (lower part in FIG. 8). Is not connected, and since one portion of the divided metal plate 210 is not connected, it is called a C-shaped metal plate. And in the surface of the three division | segmentation metal plates 210 among these division | segmentation metal plates 210, it forms in the aspect extended in the linear groove part 382 radial direction.

FIG. 9: is the top view which looked at this instrument concerning the 7th Embodiment of this invention from the bottom side.
In this embodiment, the groove part 383 is formed in the surface of the division | segmentation metal plate 210 in the back surface side of the bottom wall of the said instrument main body. In the metal plate 200 in the present embodiment, eight divided metal plates 210 are alternately connected in the vicinity of the outer peripheral portion and the central portion of the instrument main body, and at one place of the adjacent divided metal plates 210 (lower part in FIG. 9). Is not connected, and since one portion of the divided metal plate 210 is not connected, it is called a C-shaped metal plate. Of the divided metal plates 210, on the surfaces of the three divided metal plates 210 and the four divided metal plates 210, linear grooves 383 and 383 are divided into three divided metal plates 210 and four divided plates, respectively. The metal plate 210 is formed in such a manner as to extend linearly.

FIG. 10: is the top view which looked at this instrument concerning the 8th Embodiment of this invention from the bottom side.
In this embodiment, the groove part 384 is formed in the surface of the division | segmentation metal plate 210 in the back surface side of the bottom wall of the said instrument main body. The metal plate 200 in the present embodiment has eight divided metal plates 210 that are alternately connected in the vicinity of the outer peripheral portion and the central portion of the instrument main body, so that all the divided metal plates 210 are connected, so that the C-type. It is called a metal plate. Of these divided metal plates 210, on the surfaces of the two divided metal plates 210 and the three divided metal plates 210, respectively, the linear groove portions 384 and 384 have two divided metal plates 210 and three sheets, respectively. The divided metal plate 210 is formed so as to extend in a curved shape.

FIG. 11: is the top view which looked at this instrument concerning the 9th Embodiment of this invention from the upper side.
In this embodiment, the linear groove part 410 is formed in the use surface (surface which puts a cooking material) of this instrument. Specifically, this instrument is provided with a divided metal plate 200 on the back surface of the bottom wall, similar to the instrument of FIG. However, the linear groove portions 310 and 320 are not formed on the back surface of the bottom wall of the instrument body 100, and a plurality of linear groove portions 410 are formed on the use surface as shown in FIG. The linear groove portion 410 is formed along the gap 220 at a position on the use surface side corresponding to the gap 220 of the divided metal plate 200 on the back surface of the bottom wall. In the present embodiment, five linear groove portions 410 are formed as shown in FIG. 7, but the number may be four or less, or may be six or more.

  In the above embodiment, an example in which the electromagnetic cooking device is applied to a circular frying pan in plan view has been described. However, the present invention can also be applied to frying pans and pans having other shapes such as a square in plan view.

  The divided metal plate 210 is not limited to the shape of the above embodiment. In short, what is necessary is just to be comprised from the some division | segmentation metal plate 210 arrange | positioned in the state divided | segmented in the circumferential direction of the instrument main body 100, or substantially divided | segmented.

  Moreover, although each said linear groove part was made into the shape of a straight line or a curve, other shapes, such as a zigzag shape, may be sufficient.

  Next, an example of the utensil will be described in comparison with a comparative example of a conventional electromagnetic cooking utensil. In addition, in a present Example, oil is put in each appliance and it implements in the same environment as an actual cooking spot.

  In the present embodiment, as shown in FIG. 12, L and X are defined as follows. In FIG. 12, for convenience of explanation, the protrusion height X is expressed higher than the actual protrusion height.

L: Diameter of the bottom wall of the instrument body 100 X: Projection height of the bottom wall when not heated (distance from the top plate T to the center of the outer surface of the bottom wall)

  Similarly, in this embodiment, Y and Z are defined as follows.

Y: Amount of height change during heating (height changed from the position of the central portion A of the outer surface of the bottom wall when not heated by heating)
Z: Projection height of bottom wall during heating (distance from top plate T to center A of bottom wall outer surface)
<Conventional instrument A>

  As shown in FIG. 13A, the conventional instrument A is a Korean-made frying pan having a bottom wall diameter of 200 mm and a thickness of 2.6 mm, and the entire bottom wall of the instrument body 100 has a thickness of 0.1 mm. A 5 mm metal plate is joined.

  The protrusion height X of the conventional instrument A when not heated is 1.5 mm, which is 0.6% (1.2 mm) or more of the diameter of the bottom wall, and does not conform to the SG standard.

The conventional instrument A is heated gradually, and when the amount of change in height Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, It becomes as Table 1.

The amount of change in height Y200 at 200 ° C. during maximum heating is 2.25 mm on the upper side in the thickness direction. Therefore, the protrusion height Z of the bottom wall is 3.75 mm obtained by adding the height change amount Y200 (2.25 mm) to the protrusion height X (1.5 mm) when not heated. This is 0.5% (1.0 mm) or more of the diameter of the bottom wall and does not conform to the SG standard.
<Conventional instrument B>

  As shown in FIG. 13 (b), the conventional instrument B is a Chinese-made frying pan (titanium hard) having a bottom wall diameter of 200 mm and a thickness of 2.6 mm, and the entire bottom wall of the instrument body 100 is made of stainless steel. A metal plate having a thickness of 0.4 mm is joined.

  The protrusion height X of the conventional instrument B when not heated is 0.60 mm, which is 0.6% (1.2 mm) or less of the diameter of the bottom wall, and conforms to the SG standard.

When the conventional instrument B is gradually heated and the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, Table 2 shows.

A height change amount Y200 at 200 ° C. at the time of maximum heating is 3.70 mm on the upper side in the thickness direction. Therefore, the protrusion height Z of the bottom wall is 4.30 mm obtained by adding the height change amount Y200 (3.70 mm) to the protrusion height X (0.60 mm) when not heated. This is 0.5% (1.0 mm) or more of the diameter of the bottom wall and does not conform to the SG standard.
<Conventional instrument C>

  As shown in FIG. 13C, the conventional instrument C is a Chinese-made frying pan (Meliax) having a bottom wall diameter of 200 mm and a thickness of 2.6 mm, and the entire bottom wall of the instrument body 100 is made of stainless steel. A metal plate having a thickness of 0.4 mm is joined.

  The protrusion height X of the conventional instrument C when not heated is 0.60 mm, which is 0.6% (1.2 mm) or less of the diameter of the bottom wall, and conforms to the SG standard.

When the conventional instrument C is gradually heated and the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, Table 3 shows.

A height change amount Y200 at 200 ° C. at the time of maximum heating is 3.30 mm on the upper side in the thickness direction. Therefore, the protrusion height Z of the bottom wall is 3.90 mm, which is obtained by adding the height change amount Y200 (3.30 mm) to the protrusion height X (0.60 mm) when not heated. This is 0.5% (1.0 mm) or more of the diameter of the bottom wall and does not conform to the SG standard.
<Conventional device D>

  As shown in FIG. 13 (d), the conventional instrument D is a Korean-made frying pan having a bottom wall diameter of 200 mm and a thickness of 2.6 mm, and the entire bottom wall of the instrument body 100 has a thickness of 0.1 mm. A 5 mm metal plate is joined.

  The protrusion height X of the conventional instrument D when not heated is 1.00 mm, which is 0.6% (1.2 mm) or less of the diameter of the bottom wall, and conforms to the SG standard.

The conventional instrument D is gradually heated, and when the amount of change in height Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, It becomes as Table 4.

The height change amount Y200 at 200 ° C. at the time of maximum heating is 2.30 mm on the upper side in the thickness direction. Therefore, the protruding height Z of the bottom wall is 3.30 mm obtained by adding the height change amount Y200 (2.30 mm) to the protruding height X (1.00 mm) when not heated. This is 0.5% (1.0 mm) or more of the diameter of the bottom wall and does not conform to the SG standard.
<Conventional device E>

  As shown in FIG. 13 (e), the conventional instrument E is a Vietnamese frying pan having a bottom wall diameter of 200 mm and a thickness of 3.0 mm, and the entire bottom wall of the instrument body 100 is made of stainless steel with a thickness of 0.1 mm. A 45 mm metal plate is joined.

  The protrusion height X of the conventional instrument E when not heated is 0.30 mm, which is 0.6% (1.2 mm) or less of the diameter of the bottom wall, and conforms to the SG standard.

When the conventional instrument E is gradually heated, and the height change amount Y at 50 ° C. (Y50), 100 (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) at the time of heating is taken, As shown in 5.

The height change amount Y200 at 200 ° C. at the time of maximum heating is 3.50 mm on the upper side in the thickness direction. Therefore, the protrusion height Z of the bottom wall is 3.80 mm obtained by adding the height change amount Y200 (3.50 mm) to the protrusion height X (0.30 mm) when not heated. This is 0.5% (1.0 mm) or more of the diameter of the bottom wall and does not conform to the SG standard.
<This instrument 1>

  The instrument 1 according to the present invention is a frying pan having a bottom wall diameter of 180 mm and a thickness of 2.6 mm as shown in FIG. 14 (a), and the entire bottom wall of the instrument body 100 is made of stainless steel. A 50 mm metal plate is joined. The hitting depth of the linear groove portion is 0.65 mm. The shape and arrangement of the divided metal plates of the instrument 1 correspond to those shown in FIG.

  The protrusion height X of the instrument 1 when not heated is 0.65 mm, which is not more than 0.6% (1.04 mm) of the diameter of the bottom wall, and conforms to the SG standard.

When this instrument 1 is gradually heated and the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, It becomes as Table 6.

The amount of change in height Y200 at 200 ° C. during maximum heating is 0.18 mm on the upper side in the thickness direction. Therefore, the protrusion height Z of the bottom wall is 0.47 mm obtained by adding the height change amount Y200 (0.18 mm) to the protrusion height X (0.65 mm) when not heated. This is 0.5% (0.865 mm) or less of the diameter of the bottom wall and conforms to the SG standard.
<Apparatus 2>

  The instrument 2 according to the present invention is a frying pan having a bottom wall diameter of 190 mm and a thickness of 2.6 mm as shown in FIG. 14 (b), and the entire bottom wall of the instrument body 100 has a thickness of 0 made of stainless steel. A 50 mm metal plate is joined. Further, the hitting depth of the linear groove portion is 0.70 mm. The shape and arrangement of the divided metal plate of the instrument 2 correspond to those shown in FIG.

  The protrusion height X of the instrument 2 when not heated is 0.70 mm, which is not more than 0.6% (1.14 mm) of the diameter of the bottom wall, and conforms to the SG standard.

The appliance 2 is gradually heated, and when the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, It becomes as Table 7.

The amount of change in height Y200 at 200 ° C. during maximum heating is 0.01 mm on the lower side in the thickness direction. Therefore, the protruding height Z of the bottom wall is 0.69 mm obtained by subtracting the height change amount Y200 (0.01 mm) from the protruding height X (0.70 mm) when not heated. This is 0.5% (0.95 mm) or less of the diameter of the bottom wall and conforms to the SG standard.
<Apparatus 3>

  As shown in FIG. 14C, the device 3 according to the present invention is a frying pan having a bottom wall diameter of 190 mm and a thickness of 2.6 mm, and the entire bottom wall of the device body 100 has a thickness of 0 made of stainless steel. A 50 mm metal plate is joined. The hitting depth of the linear groove portion is 0.35 mm. The shape and arrangement of the divided metal plate of the instrument 3 correspond to those shown in FIG.

  The protrusion height X of the instrument 3 when not heated is 0.35 mm, which is not more than 0.6% (1.14 mm) of the diameter of the bottom wall, and conforms to the SG standard.

When this instrument 3 is gradually heated and the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, Table 8 shows.

The amount of change in height Y200 at 200 ° C. during maximum heating is 0.20 mm on the lower side in the thickness direction. Therefore, the protruding height Z of the bottom wall is 0.15 mm obtained by subtracting the height change amount Y200 (0.20 mm) from the protruding height X (0.35 mm) when not heated. This is 0.5% (0.95 mm) or less of the diameter of the bottom wall, and conforms to the SG standard.

  The instrument 4 according to the present invention is a frying pan having a bottom wall diameter of 190 mm and a thickness of 3 mm as shown in FIG. 14 (d), and the entire bottom wall of the instrument body 100 is made of stainless steel with a thickness of 0.50 mm. The metal plates are joined. The hitting depth of the linear groove is 0.60 mm.

  The protrusion height X of the appliance 4 when not heated is 0.60 mm, which is 0.6% (1.14 mm) or less of the diameter of the bottom wall, and conforms to the SG standard.

When this instrument 4 is gradually heated and the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) at the time of heating is taken, Table 9 shows.

The amount of change in height Y200 at 200 ° C. during maximum heating is 0.17 mm on the lower side in the thickness direction. Therefore, the protruding height Z of the bottom wall is 0.43 mm obtained by subtracting the height change amount Y200 (0.17 mm) from the protruding height X (0.60 mm) when not heated. This is 0.5% (0.95 mm) or less of the diameter of the bottom wall and conforms to the SG standard.

  As shown in FIG. 14 (e), the device 5 according to the present invention is a frying pan having a bottom wall diameter of 180 mm and a thickness of 3 mm, and the entire bottom wall of the device body 100 is made of stainless steel with a thickness of 0.50 mm. The metal plates are joined. The hitting depth of the linear groove is 0.50 mm.

  The protrusion height X of the instrument 5 when not heated is 0.50 mm, which is not more than 0.6% (1.08 mm) of the diameter of the bottom wall, and conforms to the SG standard.

When this instrument 5 is gradually heated and the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, Table 10 shows.

The amount of change in height Y200 at 200 ° C. during maximum heating is 0.06 mm on the lower side in the thickness direction. Therefore, the protruding height Z of the bottom wall is 0.44 mm obtained by subtracting the height change amount Y200 (0.06 mm) from the protruding height X (0.50 mm) when not heated. This is 0.5% (0.9 mm) or less of the diameter of the bottom wall and conforms to the SG standard.
<Apparatus 6>

  The instrument 6 according to the present invention is a frying pan having a bottom wall diameter of 175 mm and a thickness of 2.6 mm, and has the same arrangement as the instrument of FIG. A metal plate having a thickness of 0.50 mm is joined. Moreover, as shown in FIG. 11, the five linear recessed parts 410 are formed in the use surface of the instrument main body 100, and the depth of the hit of the linear recessed part 410 is 0.50 mm.

  The protrusion height X of the appliance 6 when not heated is 0.55 mm, which is 0.6% (1.05 mm) or less of the diameter of the bottom wall, and conforms to the SG standard.

The appliance 6 is gradually heated, and when the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken, It becomes as Table 11.

The amount of change in height Y200 at 200 ° C. during maximum heating is 0.20 mm on the upper side in the thickness direction. Therefore, the protrusion height Z of the bottom wall is 0.75 mm obtained by adding the height change amount Y200 (0.20 mm) to the protrusion height X (0.55 mm) when not heated. This is 0.5% (0.875 mm) or less of the diameter of the bottom wall and conforms to the SG standard.
<Apparatus 7>

  The present instrument 7 according to the present invention is a frying pan having a bottom wall diameter of 180 mm and a thickness of 3 mm, as shown in FIG. These so-called C-shaped metal plates are joined. The hitting depth of the linear groove is 0.50 mm.

  The protrusion height X of the instrument 7 when not heated is 1.0 mm, which is not more than 0.6% (1.08 mm) of the diameter of the bottom wall, and conforms to the SG standard.

The instrument 7 is gradually heated by adding oil, and the amount of height change Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken. And as shown in Table 12 below.

  The amount of change in height Y200 at 200 ° C. during maximum heating is 0.35 mm on the lower side in the thickness direction. Therefore, the protruding height Z of the bottom wall is 0.65 mm obtained by subtracting the height change amount Y200 (0.35 mm) from the protruding height X (1.0 mm) when not heated. This is 0.5% (0.9 mm) or less of the diameter of the bottom wall and conforms to the SG standard.

In addition, in this instrument 7, it verified also about the case of the air blowing which heats without putting oil. Table 13 below shows the height change amount Y after 30 seconds, 1 minute, 1 minute 30 seconds, and 2 minutes after the appliance 7 is gradually heated by air.

The height change amount Y at the maximum change is 0.55 mm on the lower side in the thickness direction. The protruding height Z of the bottom wall is 0.45 mm obtained by subtracting the height change amount Y (0.55 mm) from the protruding height X (1.0 mm) when not heated. This is 0.5% (0.9 mm) or less of the diameter of the bottom wall and conforms to the SG standard.
<Apparatus 8>

  The instrument 8 according to the present invention is a frying pan having a bottom wall diameter of 180 mm and a thickness of 3 mm, as shown in FIG. These so-called O-shaped metal plates are joined. The hitting depth of the linear groove is 0.50 mm.

  The protrusion height X of the instrument 8 when not heated is 1.05 mm, which is 0.6% (1.08 mm) or less of the diameter of the bottom wall, and conforms to the SG standard.

The instrument 8 is gradually heated by adding oil, and the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken. And as shown in Table 14 below.

  The amount of change in height Y200 at 200 ° C. during maximum heating is 0.50 mm on the lower side in the thickness direction. Therefore, the protrusion height Z of the bottom wall is 0.55 mm obtained by subtracting the height change amount Y200 (0.50 mm) from the protrusion height X (1.05 mm) when not heated. This is 0.5% (1.0 mm) or less of the diameter of the bottom wall and conforms to the SG standard.

In addition, in this instrument 8, it verified also about the case of the air blowing which heats without putting oil. Table 15 below shows the amount of change in height Y after 30 seconds, 1 minute, 1 minute, 30 seconds, and 2 minutes after the appliance 6 is gradually heated with air.

The height change amount Y at the maximum change is 0.9 mm on the lower side in the thickness direction. The protruding height Z of the bottom wall is 0.15 mm obtained by subtracting the height change amount Y (0.9 mm) from the protruding height X (1.05 mm) when not heated. This is 0.5% (0.9 mm) or less of the diameter of the bottom wall and conforms to the SG standard.
<Apparatus 9>

  The instrument 9 according to the present invention is a frying pan having a bottom wall diameter of 180 mm and a thickness of 3 mm, as shown in FIG. These so-called C-shaped metal plates are joined. The hitting depth of the linear groove is 0.50 mm.

  The projection height X of the appliance 9 when not heated is 0.8 mm, which is not more than 0.6% (1.08 mm) of the diameter of the bottom wall, and conforms to the SG standard.

The instrument 9 is gradually heated with oil, and the height change amount Y at 50 ° C. (Y50), 100 ° C. (Y100), 150 ° C. (Y150), and 200 ° C. (Y200) during heating is taken. And as shown in Table 16 below.

  The height change amount Y200 at 200 ° C. at the time of maximum heating is 0.47 mm on the lower side in the thickness direction. Therefore, the protruding height Z of the bottom wall is 0.33 mm obtained by subtracting the height change amount Y200 (0.47 mm) from the protruding height X (0.8 mm) when not heated. This is 0.5% (0.9 mm) or less of the diameter of the bottom wall and conforms to the SG standard.

100 ... Appliance body 200 ... Metal plate 210 ... Divided metal plate 220 ... Gap 230, 240 ... Connection part 310, 320, 330, 340, 350, 360, 370, 381, 382, 383, 384 ... Linear groove

Claims (2)

An electromagnetic cooking appliance comprising an appliance body made of a non-magnetic material and a metal plate made of a magnetic material joined only to the back surface of the bottom wall of the appliance body,
The instrument body gently protrudes upward in the thickness direction when the center of the bottom wall is not heated,
The metal plate is composed of a plurality of divided metal plates that are completely divided in the circumferential direction of the instrument body or substantially divided in a state of being connected via a connecting portion in the circumferential direction ,
An electromagnetic cooking utensil characterized in that a linear groove is formed on the back side of the bottom wall of the utensil body so as to extend in the radial direction of the utensil body.   The electromagnetic cooking appliance according to claim 1, wherein the groove is formed along a gap between the adjacent divided metal plates.