JP3196620U - Electromagnetic cooker - Google Patents

Abstract

An electromagnetic cooking utensil is provided that is lightweight and has a bottom that is difficult to deform when heated. A cooking utensil body 10 made of a non-magnetic metal such as an aluminum alloy, a heating plate 20 made of a magnetic metal, press bonded to the bottom outer surface of the cooking utensil body 10, and a cooking utensil. A reinforcing material 30 embedded in the bottom outer surface of the cooking utensil main body 10 in a state of being sandwiched between the main body 10 and the heat generating plate 20 is provided. The heat generating plate 20 includes six slits 21 extending radially. A large number of small holes 22 are formed. The reinforcing member 30 includes two kinds of large and small reinforcing members 31 and 32 formed by bending a metal wire into a V shape, and both ends of the metal wire are connected to the peripheral edge side of the heat generating plate 20. In the state where the small reinforcing material 32 is arranged inside the large reinforcing material 31 so that the bent portion of the wire is directed to the central portion side of the heat generating plate 20, the heat generating plate is avoided so as to avoid the small hole 22 portion of the heat generating plate 20. 20 are arranged at regular intervals in the circumferential direction. [Selection] Figure 1

Description

  The present invention relates to an electromagnetic cooking utensil in which a cooking utensil body heated by an electromagnetic induction heating method is formed of a nonmagnetic metal.

  Examples of this type of electromagnetic cooking utensil include those shown in FIGS. 11 (a) and 11 (b). This electromagnetic cooker 50 has a large number of small holes formed on a bottom outer surface of a cookware main body 51 formed of a nonmagnetic metal such as an aluminum alloy, using a magnetic metal such as ferritic stainless steel or martensitic stainless steel. It is a frying pan to which a heat generating plate 52 having 52a is joined, and when placed on an electromagnetic induction heater, the heat generating plate 52 generates heat by electromagnetic induction, and this heat is conducted to the cooking utensil body 51 to be heated as a whole. It has become so. The frying pan is used with a handle attached to the cooking utensil body 51. FIGS. 11A and 11B show a state where the handle is removed.

JP 2001-321269 A

  Incidentally, as described above, the cooking utensil body 51 is formed in the electromagnetic cooking utensil 50 in which the heating plate 52 formed of the magnetic metal is joined to the bottom outer surface of the cooking utensil body 51 formed of the nonmagnetic metal. The non-magnetic metal such as aluminum alloy and the magnetic metal such as ferritic stainless steel forming the heating plate 52 have different coefficients of thermal expansion, so that the bottom of the electromagnetic cooking appliance 50 is heated by the electromagnetic induction heater. Then, the bottom surface of the electromagnetic cooking utensil 50 is deformed and the contact area with the cooking utensil mounting surface in the electromagnetic induction heater is reduced, so that there is a problem that the heating efficiency is lowered and the temperature control becomes unstable. In particular, when it is deformed so as to protrude downward, the electromagnetic cooking utensil rattles when placed on the electromagnetic induction heater and cannot be heated in a stable state. There is a problem.

  For this reason, the flatness of the bottom outer surface is defined by the SG standard for the electromagnetic cooking utensil, and the bottom outer surface is outside at both normal temperature (23 ± 5 ° C.) and heating (200 ± 5 ° C.). The bottom outer surface should not be curved toward the lower side), and the flatness of the bottom outer surface is not more than the diameter L × 0.6% of the cooking utensil at room temperature (23 ± 5 ° C.), At the time of heating (200 ± 5 ° C.), it is stipulated that the flatness of the outer surface of the bottom must be not more than the diameter L × 0.5% of the cooking utensil.

  In order to conform to this SG standard, the thickness of the cooking utensil body 51 formed of a nonmagnetic metal such as an aluminum alloy having a high thermal expansion coefficient must be secured to 3.8 mm or more, and the entire electromagnetic cooking utensil 50 There is a problem that it becomes heavy and the user is difficult to handle.

  Therefore, an object of the present invention is to provide an electromagnetic cooker that is lightweight and has a bottom portion that is difficult to deform during heating.

  In order to solve the above problems, the device according to claim 1 is a cooking utensil body formed of a nonmagnetic metal, and a heat generation formed of a magnetic metal press-bonded to the bottom outer surface of the cooking utensil body. An electromagnetic cooker comprising a plate and a reinforcing member formed of a metal wire sandwiched between the cookware body and the heating plate in a state of being embedded in the cookware body. It is to provide.

  The invention according to claim 2 is the electromagnetic cooker according to claim 1, wherein the reinforcing material is a metal wire bent into a V shape, and both ends of the metal wire are the heating plate. The bent portion of the metal wire is arranged so as to face the center side of the heat generating plate.

  Further, the invention according to claim 3 is the electromagnetic cooker according to claim 1 or 2, wherein the heat generating plate has a plurality of small holes, and the reinforcing member has the small hole portion. It is characterized by being arranged to avoid.

  Further, the invention according to claim 4 is the electromagnetic cooker according to claim 3, wherein the heating plate is formed with a plurality of slits extending radially from the central part toward the peripheral part, The reinforcing material is arranged so as to avoid the slit portion.

  As described above, the electromagnetic cooker according to the first aspect of the present invention is such that the reinforcing material formed of a metal wire is sandwiched between the cookware body and the heating plate in a state where the reinforcement is embedded in the cookware body. Therefore, even if the thickness of the cooking utensil body is reduced, deformation of the bottom due to heating hardly occurs, and good flatness can be ensured.

  Therefore, it is possible to reduce the weight of the electromagnetic cooking appliance that conforms to the SG standard, and to improve the user-friendliness.

  Moreover, in the electromagnetic cooking appliance of the invention according to claim 2, the reinforcing material is a metal wire bent in a V shape, and both ends of the metal wire are bent at the periphery of the heat generating plate, and the metal wire is bent. Since the portions are arranged so as to face the center side of the heat generating plate, the effect of being difficult to deform in the radial direction can be obtained.

  Moreover, in the electromagnetic cooking appliance of the invention according to claim 3, since a large number of small holes are formed in the heat generating plate, and the reinforcing material is arranged so as to avoid the small hole portions, the peripheral edge of the small holes A small hole is formed so that an annular projection protrudes from the top of the heating plate to the top surface of the heating plate, and when the heating plate is press-joined to the bottom outer surface of the cooking utensil body, the annular projection protruding to the top surface of the heating plate , The reinforcing material does not become an obstacle to prevent deformation of the bottom part due to heating and heat generation, even when the joining force of the heating plate to the bottom outer surface of the cooking utensil body is increased by biting into the bottom outer surface of the cooking utensil body. It is possible to increase the bonding force of the plates together.

  In the electromagnetic cooking appliance of the invention according to claim 4, the heat generating plate is substantially divided in the circumferential direction by forming a plurality of slits extending radially from the central portion toward the peripheral portion of the heat generating plate. In addition, since the reinforcing material is arranged so as to avoid the slit portion, an effect that the deformation of the bottom portion due to heating is further less likely to occur can be obtained.

It is a bottom view which shows the frying pan which is one Embodiment of the electromagnetic cooking appliance which concerns on this device. It is sectional drawing along the XX line of FIG. It is a partially cutaway exploded perspective view showing the same frying pan. It is a top view which shows the heat generating plate which comprises the frying pan same as the above. It is a top view which shows the metal wire which comprises the frying pan same as the above. FIG. 5 is a cross-sectional view taken along line XX in FIG. 4. It is an expanded sectional view which shows the bottom part of a frying pan same as the above. It is explanatory drawing for demonstrating the manufacturing method of a frying pan same as the above. It is a top view which shows the modification of a metal wire. It is a top view which shows the other modification of a metal wire. (A) is a top view which shows the frying pan which is the conventional electromagnetic cooking appliance, (b) is a bottom view which shows a frying pan same as the above.

  Hereinafter, embodiments will be described with reference to the drawings. FIGS. 1-3 has shown the frying pan 1 which is one Embodiment of the electromagnetic cooking appliance which concerns on this invention. As shown in the figure, the frying pan 1 includes a cooking utensil body 10 made of a nonmagnetic metal such as an aluminum alloy, and ferritic stainless steel or martensite press-bonded to the bottom outer surface of the cooking utensil body 10. A heating plate 20 made of a magnetic metal such as stainless steel, and a reinforcing member 30 embedded in the bottom outer surface of the cooking utensil body 10 while being sandwiched between the cooking utensil body 10 and the heating plate 20; It consists of a handle that is detachably attached to the instrument body 10, and the figure shows a state in which the handle has been removed.

  The cooking utensil body 10 is formed by press-molding a 2.5 mm-thick plate material made of an aluminum alloy, and has a circular bottom 11 and a tapered body 12 rising from the periphery of the bottom 11. And have.

  As shown in FIGS. 3 and 4, the heat generating plate 20 is formed in a disk shape that is slightly smaller than the bottom of the cooking utensil body 10, and is formed in a radial shape from the center of the disk and extends in the radial direction. 6 and a large number of small holes 22 arranged concentrically around the center of the disk, and as shown in FIG. 6, an annular protrusion 22a is formed on one side from the periphery of the small hole 22. It protrudes.

  As shown in FIGS. 1, 3, and 5, the reinforcing member 30 includes two kinds of large and small reinforcing members 31 and 32 formed by bending a metal wire such as stainless steel or iron into a V shape. The small reinforcing material 32 is disposed inside the large reinforcing material 31 so that both ends of the metal wire face the peripheral edge side of the heat generating plate 20 and the bent portion of the metal wire faces the central portion side of the heat generating plate 20. In this state, the heat generating plate 20 is disposed at regular intervals in the circumferential direction so as to avoid the small holes 22 of the heat generating plate 20.

  As shown in FIG. 8, the frying pan 1 configured as described above has the reinforcing member 30 placed on the heat generating plate 20 disposed so that the annular protrusion 22a faces upward, as described above. The heating plate 20 is joined to the bottom outer surface of the cooking utensil body 10 by sandwiching and pressing it with the upper and lower molds UM, DM in a state where this is arranged below the bottom 11 in the cooking utensil body 10. As shown in FIG. 7, when the annular protrusion 22 a bites into the bottom outer surface of the cooking utensil body 10, the bonding force to the bottom outer surface of the cooking utensil body 10 is enhanced, and the reinforcing material 30 is embedded in the cooking utensil body 10. It has come to be.

  As described above, the frying pan 1 is cooked because the reinforcing member 30 formed of a metal wire is sandwiched between the cooking utensil body 10 and the heating plate 20 in a state where the reinforcing material 30 is embedded in the cooking utensil body 10. Even if the thickness of the instrument body 10 is reduced, deformation of the bottom due to heating hardly occurs, and good flatness can be ensured. Therefore, it is possible to reduce the weight of the frying pan that conforms to the SG standard, and the user-friendliness can be improved.

  Further, in this frying pan 1, the reinforcing member 30 obtained by bending the metal wire into a V shape is formed, the both ends of the metal wire are on the peripheral edge side of the heat generating plate, and the bent portion of the metal wire is on the central portion side of the heat generating plate. Since it is arranged so as to face, an effect that it is difficult to deform in the radial direction is obtained.

  Moreover, in this frying pan 1, since many small holes 22 are formed in the heat generating plate 20, and the reinforcing member 30 is disposed so as to avoid the small hole 22 portion, as described above, the small holes 22 When the small hole 20 is formed so that the annular protrusion 22a protrudes from the periphery of the heat generating plate 20 to the upper surface side of the heat generating plate 20, and when the heat generating plate 20 is press bonded to the bottom outer surface of the cooking utensil body 10, the heat generating plate 20 Even when the joining force of the heat generating plate 20 to the bottom outer surface of the cooking utensil body 10 is increased by causing the annular protrusion 22a protruding to the upper surface side to bite into the bottom outer surface of the cooking utensil body 10, the reinforcing member 30 is an obstacle. However, it is possible to realize both the prevention of deformation of the bottom portion due to heating and the enhancement of the joining force of the heat generating plate 20.

  Moreover, in this frying pan 1, the heat generating plate 20 is substantially divided in the circumferential direction by forming a plurality of slits 21 extending radially from the central portion toward the peripheral portion of the heat generating plate 20, so that the reinforcing plate 20 is reinforced. Since the material 30 is arranged so as to avoid the slit 21 portion, an effect is obtained that deformation of the bottom portion due to heating is further less likely to occur.

  In the frying pan 1 described above, the reinforcing material 30 obtained by bending the metal wire into a V shape is employed, but the present invention is not limited to this, and the circular reinforcing material 30a as shown in FIG. It is also possible to employ an arc-shaped reinforcing material 30b, and it is also possible to employ a linear reinforcing material 30c as shown in FIG.

  Moreover, in the frying pan 1 described above, the plurality of slits 21 extending radially from the center of the disk are formed in the heating plate 20, but the slits 21 are not limited thereto. Can be omitted.

  Moreover, although each embodiment mentioned above demonstrated the frying pan as an example of the electromagnetic cooking appliance of this invention, it is not limited to this, This invention is applied about various electromagnetic cooking appliances, such as a pan and a kettle. It goes without saying that it can be done.

  The present invention can be used for an electromagnetic cooker heated by an electromagnetic induction heating method.

DESCRIPTION OF SYMBOLS 1 Fry pan 10 Cooking utensil body 11 Bottom part 12 Body part 20 Heat generating plate 21 Slit 22 Small hole 22a Protrusion 30, 30a, 30b, 30c, 31, 32 Reinforcing material UM, DM Mold

Claims (4)

A cooking utensil body formed of a non-magnetic metal,
A heating plate formed of magnetic metal press-bonded to the bottom outer surface of the cooking utensil body,
An electromagnetic cooking utensil, wherein a reinforcing material formed of a metal wire is sandwiched between the cooking utensil body and the heating plate in a state of being embedded in the cooking utensil body.   The reinforcing material is obtained by bending a metal wire into a V shape, and both ends of the metal wire face the peripheral edge side of the heat generating plate, and the bent portion of the metal wire faces the central portion side of the heat generating plate. The electromagnetic cooker according to claim 1, which is arranged as described above. A large number of small holes are formed in the heating plate,
The electromagnetic cooker according to claim 1 or 2, wherein the reinforcing member is disposed so as to avoid the small hole portion. The heating plate is formed with a plurality of slits extending radially from the central portion toward the peripheral portion,
The electromagnetic cooker according to claim 3, wherein the reinforcing material is disposed so as to avoid the slit portion.

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