JP2014117488A - Cooker using electromagnetic induction heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooker in which heat from a heating unit is easily transferred.SOLUTION: A cooker that uses an electromagnetic induction heating system is provided with a pot body 10, and a heating unit 20 having a plate shape lacking a center part attached to the bottom face 11 of the pot body 10. The heating unit 20 is fixed by caulking on a slope on which an inclination on the bottom face 11 is provided. The heating unit 20 is fixed by caulking in a state that biasing is made so that a part of the heating unit 20 is pressed on the slope.

Description

The present invention is based on electromagnetic induction heating.
The present invention relates to a cooking device using a heating method.

  Conventionally, as in Patent Document 1, a cooking device using an electromagnetic induction heating method has been proposed.

JP 2003-102616 A

  In such a cooker, a magnetic heating element is attached to the bottom surface of the nonmagnetic pan body by caulking or the like. However, due to the difference in coefficient of thermal expansion between the pan body and the heating element, the joining state between the two is loose. The heat from the heating element may be difficult to be transmitted.

  Accordingly, an object of the present invention is to provide a cooking device in which heat from a heating element is easily transmitted.

  A cooker using the electromagnetic induction heating method according to the present invention includes a pan body and a heating element that has a hollow plate shape and is attached to the bottom surface of the pan body, and the heating element is provided with an inclination on the bottom surface. It is fixed by caulking on the slope.

  Since the contact is made with the inclined surface, it is possible to increase the area where the heating element contacts the bottom surface compared to the case where the heating element is attached to the non-tilted surface, and the heat from the heating element is increased. There is an advantage that is easy to be transmitted to the pan body. Moreover, since a contact area is wide, it is easy to maintain the joining state with the pan body of the heating element. In addition, the expansion of the heating element due to heat is also in a direction along the slope, and it is easier to maintain the joined state as compared with a configuration in which the heating element is attached to a surface that is not inclined. By maintaining the joined state, it becomes possible to maintain a state in which heat from the heating element is easily transmitted to the pan body.

  Preferably, the heating element is fixed by caulking in a state where a part of the heating element is biased to be pressed.

  Since the heating element is squeezed in a state where it is urged in the pushing process, the adhesiveness to the bottom surface of the heating element is increased as compared with the case where staking is performed without such urging, and the heating element pan It becomes easy to maintain a joining state with the main body 10.

  Further, preferably, in a state where the bottom surface of the pan body is above the opening, the inner peripheral edge of the hollow plate shape is positioned higher than the outer peripheral edge of the hollow plate shape. A slope is provided on the bottom surface.

  Because the bottom of the pan body is provided with a slope where the center part rises more than the peripheral part so that the inner peripheral part of the hollow plate shape of the heating element is positioned higher than the outer peripheral part of the hollow plate shape The thickness of the bottom surface is thick at the center and can be reduced as it goes to the outer periphery (the heat capacity can be reduced), making it easy to make the heat distribution uniform.

  Preferably, a step on the upper surface is provided so that the outer peripheral edge and the inner peripheral edge of the hollow plate shape are thinner than other regions of the hollow plate shape, and are provided around the region where the heating element is attached. Caulking is performed by deforming the projected portion so as to cover the step.

  More preferably, the caulking is performed in a state where the jig is attached to the side of the protruding portion that is not adjacent to the heating element so that the protruding portion does not deform on the side of the protruding portion that is not adjacent to the heating element.

  By using a caulking jig, there is an advantage that the deformation direction by caulking can be easily guided in a predetermined direction (shape).

  Preferably, after the caulking is performed, a shaving process for shaving the protrusions and the surface of the heating element is performed, and after the shaving process, the caulking using the projecting parts is maintained. The gradient, the thickness of the heating element, the step size of the outer peripheral edge and the inner peripheral edge, the height of the protrusion, and the scraping amount in the scraping step are determined.

  The method of manufacturing a cooker using the electromagnetic induction heating method according to the present invention is between the protrusions used for caulking provided on the bottom surface of the pan body, and on the slope provided with the inclination on the bottom surface. , A heating element insertion step for inserting a heating element having a hollow plate shape, a pressing step for pressing a part of the heating element to bring the heating element into contact with the inclined surface, and a protruding portion having a hollow plate shape A caulking process in which the outer peripheral edge and the inner peripheral edge are deformed so as to cover a step on the upper surface provided to be thinner than other regions of the hollow plate shape, a protrusion, and a heating element A shaving process for shaving the surface of the.

  As described above, according to the present invention, it is possible to provide a cooking device in which heat from a heating element is easily transmitted.

In the cooking appliance in this embodiment, it is a perspective view which shows the state before a heat generating body is attached to a pan main body. It is a perspective view which shows the pan main body and heat generating body after a heat generating body insertion process. It is a perspective view which shows the pan main body and heat generating body after a pushing process. It is a perspective view which shows the pan main body, the heat generating body, the 1st crimping jig | tool, and the 2nd crimping jig | tool after a fitting process. It is a perspective view which shows the pan body after a crimping process, a heat generating body, the 1st crimping jig, and the 2nd crimping jig. It is a perspective view which shows the pan main body and heat generating body after a removal process. It is a perspective view which shows the pan main body and heat generating body after a scraping process. In a cooking device in this embodiment, it is a section lineblock diagram showing the state before a heating element is attached to a pan body. It is a cross-sectional block diagram which shows the pan main body and heat generating body after a heat generating body insertion process. It is a cross-sectional block diagram which shows the pan main body and heat generating body after a pushing process. It is a cross-sectional block diagram which shows the pan main body, heat generating body, 1st crimping jig | tool, and 2nd crimping jig | tool after a fitting process. It is a cross-sectional block diagram which shows the pan main body after a caulking process, a heat generating body, the 1st caulking jig, and the 2nd caulking jig. It is a cross-sectional block diagram which shows the pan main body and heat generating body after a removal process. It is a cross-sectional block diagram which shows the pan main body and heat generating body after a scraping process.

  Hereinafter, the present embodiment will be described with reference to the drawings. The cooker 1 using the electromagnetic induction heating method in the present embodiment includes a pan body (a container for putting a cooking object) 10 and a heating element 20 (see FIGS. 1 to 14). Moreover, when attaching the heat generating body 20 to the pan main body 10, the 1st crimping jig | tool 51 and the 2nd crimping jig | tool 52 are used. In the present embodiment, the configuration of the cooking device 1 will be described using a pan, but other cooking devices 1 such as a frying pan may be used.

  In addition, in order to make it easy to distinguish from other members, in FIGS. 1-7, the upper surface of the heat generating body 20 is grid-like shaded, but the shade is essential for carrying out the present invention. Is not.

  The pan body 10 is made of a nonmagnetic material such as an aluminum alloy, and the bottom surface 11 is provided with first to third protrusions 11 a to 11 c used for attaching the heating element 20.

  The first protrusion 11a has a substantially hollow column shape (for example, a hollow cylinder shape), and the height of the substantially hollow column shape is longer than the height of the heat generating member 20 before the heating element 20 is attached. Have

  The second protruding portion 11b has a substantially hollow column shape (for example, a hollow column shape) surrounding the side surface of the first protruding portion 11a. In the state before the heating element 20 is attached, the height of the substantially hollow column shape is It has a dimension longer than the height of the heating element 20.

  The 3rd projection part 11c has the substantially hollow column shape (for example, hollow cylinder shape) surrounding the side surface of the 2nd projection part 11b.

  The first space 101 surrounded by the first protrusion 11a and the bottom surface 11 is a lower part (bottom surface of the first crimping jig 51) so that the first crimping jig 51 can be fitted inside the first protrusion 11a. 11 (part on the side in contact with 11) (substantially cylindrical in this embodiment).

  The second space 102 surrounded by the first protrusion 11a, the second protrusion 11b, and the bottom surface 11 is heated so that the heating element 20 can be inserted between the first protrusion 11a and the second protrusion 11b. It has substantially the same shape (in the present embodiment, a substantially donut shape) as the lower surface of the body 20 (the portion on the side in contact with the bottom surface 11). However, the second space 102 may have a form in which a gap is formed when the heating element 20 is inserted in consideration of a pressing process described later and thermal expansion during use.

  A third space surrounded by the second protrusion 11b, the third protrusion 11c, and the bottom surface 11 so that the second crimping jig 52 can be fitted between the second protrusion 11b and the third protrusion 11c. 103 has substantially the same shape (substantially donut shape in this embodiment) as the lower part of the second crimping jig 52 (the part on the side in contact with the bottom surface 11).

  The region A between the first protrusion 11a and the second protrusion 11b on the bottom surface 11 is in a state where the bottom surface 11 of the pan body 10 is above the opening (upper and lower of the normal pan use state). In the reverse state), it has a slope such that the central part is higher than the peripheral part. That is, the bottom surface 11 of the pan body 10 is inclined so that the inner peripheral edge portion of the hollow plate shape of the heating element 20 is higher than the outer peripheral edge portion of the hollow plate shape. Therefore, the heating element 20 is inserted into the second space 102 in a state where the bottom surface 11 and the region A are not parallel, and the heating element 20 is pushed into the vicinity of the outer peripheral edge of the heating element 20 so as to approach the bottom surface 11. 20 is attached to the bottom surface 11 (see FIGS. 2, 3, 9, and 10).

  The heating element 20 is made of a magnetic material such as ferritic stainless steel, has a hollow plate shape (for example, a hollow disc shape) having a thickness of 2.0 mm to 2.5 mm, and has an outer peripheral edge of the hollow plate shape. A step is provided on the upper surface (the portion not in contact with the bottom surface 11) so that the portion and the inner peripheral edge portion are thinner than other regions. For this reason, the cross section of the heating element 20 has a convex shape (see FIGS. 8 to 14).

  The heating element 20 is attached to a slope (region A) provided with an inclination in the bottom surface 11 in a state of being urged to press a part of the heating element 20 (here, the outer peripheral edge), and is fixed by caulking. The The heating element 20 has a shape that can be pressed against the region A (an inclined shape or a flat plate shape different from the inclination of the region A), and is made to have the same inclination as the region A by the pressing bias.

  The caulking is performed by deforming the projections (the first projection 11a and the second projection 11b) provided around the region where the heating element 20 is attached so as to cover the step of the peripheral edge of the heating element 20.

  When caulking is performed, the protrusion (first space 101 or the third space 103) on the side (first space 101 or third space 103) that is not adjacent to the heating element 20 on the side surface of the protrusion (first protrusion 11a and second protrusion 11b). Jigs (first caulking jig 51 and second caulking jig 52) are attached to the first space 101 and the third space 103 so that the one projecting part 11a and the second projecting part 11b) do not deform.

  The first caulking jig 51 has a substantially columnar shape (for example, a columnar shape), the second caulking jig 52 has a substantially hollow columnar shape (for example, a hollow columnar shape), and the heat generating pair 20 is attached to the pan body 10. Used as a caulking jig when attaching to the bottom surface 11.

  The first caulking jig 51 and the second caulking jig 52 are made of a material that is harder than the first protrusion 11a and the second protrusion 11b.

  Next, a procedure for attaching the heating element 20 to the bottom surface 11 of the pan body 10 will be described.

  With the bottom surface 11 of the pan body 10 facing upward (see FIGS. 1 and 8), the heating element 20 is inserted into the second space 102 (heating element insertion step, see FIGS. 2 and 9). In this state, the heating element 20 is in contact with the bottom surface 11 in part of the area A, but not in other areas.

  The outer peripheral edge of the heating element 20 is pressed so as to approach the bottom surface 11, and the hollow plate shape constituting the heating element 20 and the region A of the bottom surface 11 are brought into contact with each other in a parallel state (pressing step, (See FIGS. 3 and 10).

  The first caulking jig 51 is fitted into the first space 101, and the second caulking jig 52 is fitted into the third space 103 (fitting process, see FIGS. 4 and 11). In addition, the form by which a heat generating body insertion process and an individual preparation process are performed after a fitting process may be sufficient.

  With the first caulking jig 51 fitted into the first space 101 and the second caulking jig 52 fitted into the third space 103, the outer peripheral edge portion and the inner peripheral edge portion of the hollow plate shape of the heating element 20 are formed. The first protrusion 11a and the second protrusion 11b are deformed so as to cover the step, and the heating element 20 inserted in the second space 102 is fixed (see the caulking process, see FIGS. 5 and 12).

  The first caulking jig 51 and the second caulking jig 52 are removed (see the removal process, FIG. 6 and FIG. 13).

  After fixing by caulking, the surfaces of the first protrusion 11a, the heating element 20, the second protrusion 11b, and the third protrusion 11c are shaved so that the surfaces become flat (see scraping process, see FIGS. 7 and 14). ).

  Even after the scraping step, caulking using the first protrusion 11a (a part of the deformed first protrusion 11a covers and fixes the step on the inner peripheral edge of the heating element 20) or the second protrusion The slope of the region A of the bottom surface 11 is maintained so that crimping using the portion 11b (a part of the deformed second protrusion 11b covers and fixes the step on the outer peripheral edge of the heating element 20) is maintained. The thickness of the heating element 20, the step size of the peripheral edge, the height of the first protrusion 11a and the second protrusion 11b, the amount of scraping, and the like are determined.

  Since the contact is made with the inclined surface, it is possible to widen the region where the heating element 20 contacts the bottom surface 11 as compared with the case where the heating element 20 is attached to the non-inclined surface. There is an advantage that the heat from 20 is easily transmitted to the pan body 10. Moreover, since a contact area is wide, it is easy to maintain the joining state with the pan body 10 of the heat generating body 20. Further, the expansion of the heating element 20 due to heat is also in a direction along the inclined surface, and it is easier to maintain the joined state as compared with a mode in which the heating element 20 is attached to a surface that is not inclined. By maintaining the joined state, it is possible to maintain a state in which heat from the heating element 20 is easily transmitted to the pan body 10.

  Further, since the heating element 20 is squeezed in a state where it is urged in the pushing process, the adhesion of the heating element 20 to the bottom surface 11 is enhanced as compared with the case where the staking is performed without such urging. It becomes easy to maintain the joining state with the pan body 10 of the heating element 20.

  The bottom surface 11 of the pan body 10 has a slope in which the central portion rises higher than the peripheral portion so that the inner peripheral edge of the hollow plate shape of the heating element 20 is higher than the outer peripheral edge of the hollow plate shape. Since it is provided, the thickness of the bottom surface 11 is thick at the center and can be reduced toward the outer periphery (the heat capacity can be reduced), and the heat distribution can be made uniform easily.

  By using the first caulking jig 51 and the second caulking jig 52, there is an advantage that the deformation direction by caulking can be easily guided in a predetermined direction (shape).

DESCRIPTION OF SYMBOLS 1 Cooker 10 Pan body 11 Bottom surface 11a-11c 1st protrusion part-3rd protrusion part 20 Heat generating body 51, 52 1st crimping jig, 2nd crimping jig 101-103 1st space-3rd space

Claims (7)

The pan body,
It has a hollow plate shape, and includes a heating element attached to the bottom surface of the pan body,
The cooking device using an electromagnetic induction heating method, wherein the heating element is fixed by caulking on an inclined surface provided with an inclination on the bottom surface.   The cooking device according to claim 1, wherein the heating element is fixed by caulking in a state in which the heating element is urged to be partially pressed on the slope.   The bottom surface of the pan body so that the inner peripheral edge of the hollow plate shape is higher than the outer peripheral edge of the hollow plate shape, with the bottom surface of the pan body being above the opening. The cooker according to claim 1, further comprising a slope. Steps on the upper surface are provided so that the outer peripheral edge and the inner peripheral edge of the hollow plate shape are thinner than other regions of the hollow plate shape,
The cooking device according to claim 1, wherein the caulking is performed by deforming a protrusion provided around a region where the heating element is attached to cover the step.   The caulking is performed in a state in which a jig is attached to the side of the protrusion not adjacent to the heating element so that the protrusion does not deform on the side of the protrusion not adjacent to the heating element. The cooker according to claim 4, wherein After the caulking, a shaving process for shaving the protrusion and the surface of the heating element is performed,
The slope of the bottom surface, the thickness of the heating element, the step size of the outer peripheral edge and the inner peripheral edge, and the protrusion so as to maintain crimping using the protrusion after the scraping step. The cooker according to claim 4, wherein the height and the amount of scraping in the scraping step are determined. A heating element insertion step of inserting a heating element having a hollow plate shape between the protrusions used for caulking provided on the bottom surface of the pan body and on the inclined surface provided with an inclination at the bottom surface; ,
A pressing step of pressing the part of the heating element to bring the heating element into contact with the slope;
The protrusion is deformed so as to cover the step on the upper surface provided so that the outer peripheral edge and the inner peripheral edge of the hollow plate shape are thinner than other regions of the hollow plate shape. A caulking process to be performed;
A method for manufacturing a cooking appliance using an electromagnetic induction heating method, comprising: the protrusion and a scraping step for scraping the surface of the heating element.

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