JP2006000357A - Pot for induction heating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that abnormal noise occurs and heating efficiency is lowered in the case of heating due to the occurrence of the deformation of a magnetic substance or floating of a magnetic substance flat part and a magnetic substance connection part due to the difference between heat expansion of the magnetic substance and that of nonmagnetic substance. <P>SOLUTION: In the pot, clearances l are provided at bosses 4 molded integrally with a pot body (nonmagnetic substance) 1 and holes 5 provided at stainless plates (magnetic substances) 2, and the pot body 1 and the stainless plates 1 are fastened by caulking. Thus, the difference between the coefficient of expansion of the stainless plates 2 and that of the pot body 1 is absorbed by the clearances 1 when cooking. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an IH heating apparatus pan used for cooking as an object to be heated of an IH heating apparatus.

Conventionally, this kind of pan for IH heating apparatus is made of a non-magnetic lightweight aluminum alloy with high thermal conductivity, and a magnetic ferritic stainless steel plate for electromagnetic induction heating is joined to the bottom of the pan. (For example, refer to Patent Document 1).
JP 2003-102616 A

  However, in the conventional configuration, the outer peripheral portion of the end face of the magnetic body and the non-magnetic body are in close contact and are crimped in a sealed state, and the difference in thermal expansion between the magnetic body and the non-magnetic body when cooked. As a result, deformation of the magnetic material or floating of the magnetic flat surface portion and the non-magnetic material joining portion occurs, which causes problems such as generation of abnormal noise during heating and reduction in heating efficiency.

  The present invention solves the above-mentioned conventional problems, and provides a pan for an IH heating apparatus that can absorb the difference in expansion coefficient between a magnetic body and a non-magnetic body and can perform stable and efficient heating. The purpose is to provide.

  In order to solve the above-described conventional problems, the pan for the IH heating apparatus of the present invention is configured such that a clearance is provided between a boss formed integrally with a non-magnetic material and a hole provided in the magnetic material, and the non-magnetic material is caulked. By fastening the magnetic body and the magnetic body, the difference in expansion coefficient between the magnetic body and the non-magnetic body is absorbed by the clearance when cooking.

  Thereby, deformation and floating of the magnetic body can be prevented.

  The pan for the IH heating device of the present invention can absorb the difference in expansion coefficient between the magnetic body and the non-magnetic body by the clearance, thereby preventing the deformation and floating of the magnetic body, and stable and efficient heating. it can.

  In the first invention, cooking is performed by providing a clearance between a boss formed integrally with a non-magnetic material and a hole provided in the magnetic material, and caulking and fastening the non-magnetic material and the magnetic material. In addition, it becomes possible to absorb the difference in the expansion coefficient between the magnetic body and the non-magnetic body by the clearance, thereby preventing the deformation and floating of the magnetic body and stable and efficient heating.

  In the second invention, in particular, the boss head top is made substantially flush with the pan bottom plane by providing a recess in advance in the magnetic body around the protrusion of the boss head after crimping in the first invention. It is possible to make the bottom of the pot less discomfort for the user.

  In particular, the third invention has at least two types of the shape of the plurality of bosses of the first or second invention and the shape of the plurality of holes to be fitted from different shapes such as a polygon, a circle, an oval, and an ellipse. By combining the above, it becomes possible to arbitrarily select the stress strain due to the heat distribution of the pan bottom, and to make the pan bottom with good durability.

  According to a fourth aspect of the present invention, in particular, the boss head after crimping according to any one of the first to third aspects is made larger than a hole fitting with the boss, and the boss head has a clearance between the boss and the hole. By covering, the clearance will not be clogged with foreign substances, and stable and efficient heating can be performed.

  In the fifth aspect of the invention, in particular, the end face treatment is performed so that the end face of the hole fitted to the boss of any one of the first to fourth aspects has a larger clearance near the boss head after crimping than the far side. By applying, it corresponds to the fact that the boss head side closer to the electromagnetic induction part of the IH heating device of the magnetic body becomes high temperature and large expansion during cooking, so that clearance is secured and stable and efficient. Can be heated.

  In the sixth invention, in particular, the clearance between the boss of any one of the first to fifth inventions and the hole to be fitted does not make the entire circumference uniform. Even when the sizes are different, at least a room for expansion is left in the wider gap, the clearance is secured, and the thermal stress strain can be relaxed, so that stable and efficient heating can be performed.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIGS. 1-3 is a schematic block diagram of the pan for IH heating devices of the 1st Embodiment of this invention. 1A is a side sectional view, FIG. 1B is a partially enlarged view near a solid line A, and FIG. 1C is a partially enlarged view of an example in which end face processing is performed on the end face of a hole. FIG. 2 is a partial enlarged view of an example in which a concave portion is provided in advance in the magnetic body around the convex portion of the boss head portion after crimping. FIG. 3 is a plan view of the stainless steel plate.

  The IH heating apparatus pan shown in FIGS. 1 to 3 presses a ferritic stainless steel plate (magnetic metal plate) 2 that is a magnetic material on a back bottom surface 20 of an aluminum alloy pan body 1 that is a non-magnetic material. By fastening by caulking from the pan body side.

  1 (a) and 1 (b), a plurality of holes 5 are provided in a distributed manner in the stainless steel plate 2, and a plurality of bosses 4 protruding through holes 5 and clearances 1 are pressed and pressed. A boss head 3 is formed by crushing and crimping is performed, and each hole 5 of the stainless steel plate 2 is crimped to the pan body 1.

  Thus, in this Embodiment 1, the clearance 1 is provided in the boss | hub 4 and the hole 5 after caulking, and the difference in the expansion coefficient at the time of cooking with the pan main body 1 and the stainless steel plate 2 from which a material differs is shown. It is possible to absorb with clearance l. As a result, the stainless plate 2 that is mainly induction-heated by the high-frequency magnetic field of the IH heating device is prevented from being deformed and lifted, and stable and efficient heating can be achieved.

  Further, since the boss head 3 covers the clearance l, the clearance is not clogged with foreign matters, and stable and efficient heating can be performed as described above.

  Further, in FIGS. 1A and 1C, the clearances L1 and L2 on the side close to the boss head 3 after crimping on the end surface 21 of the hole 5 of the stainless steel plate 2 are larger than the clearances l1 and l2 on the far side. End face treatment is applied. Accordingly, the boss head 3 side closer to the electromagnetic induction part of the IH heating device corresponds to a high temperature and large expansion during cooking, and a predetermined clearance can be secured at the end face 21 during expansion. Thus, similar to the above, stable and efficient heating can be performed.

  Further, when the temperature distribution is different between the inner circumference l2, L2 and the outer circumference l1, L1, for example, when the outer circumference is higher than the inner circumference during cooking, the clearance l1> clearance l2 and the clearance L1> clearance L2 are satisfied in advance. Thus, the end surface processing of the end surface 21 of the hole 5 of the stainless steel plate 2 is performed. This leaves room for expansion at least in the wider gaps L1 and L1, even if the magnitude of thermal expansion differs across the entire circumference, ensuring a predetermined clearance and reducing thermal stress strain. Therefore, stable and efficient heating can be performed.

  Moreover, in FIG. 1 (a), FIG. 2, by providing the recessed part 7 beforehand in the stainless steel plate 2 of the outer periphery 9 of the convex part of the boss head 3 part of the pan main body 1 after crimping, the top part of the boss head 3 is made into a pot bottom. It becomes possible to make it substantially the same plane as the flat surface 10, and it is possible to make the pan bottom with less discomfort for the user.

  Further, in FIG. 3, the shape of a plurality of bosses not shown and the shape of the plurality of holes 5 of the stainless steel plate 2 to be fitted are illustrated from different shapes such as a polygon, a circle, an oval, an ellipse, etc. By combining a circle and an ellipse, it is possible to select the arrangement of the clearance between the boss and the hole according to the heat distribution of the pan bottom, and arbitrarily select the stress strain, making it a durable pan bottom .

  As described above, the pan for the IH heating apparatus according to the present invention can absorb the difference in expansion coefficient between the magnetic body and the non-magnetic body by the clearance, thereby preventing the deformation and floating of the magnetic body, Therefore, it can be applied to uses such as pots, pans, plates, and kettles that are used as objects to be heated in the IH heating apparatus.

(A) Side sectional view of the pan for IH heating apparatus of the first embodiment of the present invention (b) Partial enlarged view near the solid line A of the pan for IH heating apparatus of the first embodiment of the present invention (c) ) Partial enlarged view of an example in which the end surface treatment is applied to the end surface of the hole of the pan for the IH heating apparatus according to the first embodiment of the present invention. The elements on larger scale of the example which provides a recessed part beforehand in the magnetic body of the outer periphery of the convex part of the boss head part after crimping of the pan for IH heating devices of the 1st Embodiment of this invention The top view of the stainless steel plate of the pan for IH heating devices of the 1st Embodiment of this invention

Explanation of symbols

1 Pan body (non-magnetic material)
2 Stainless steel plate (magnetic material)
3 Pan body boss head 4 Pan body boss 5 Stainless steel plate hole 7 Recessed portion of magnetic body 10 Pan bottom plane 20 Back side of pan body 21 End surface of stainless plate hole

Claims (6)

A pan for an IH heating apparatus in which a clearance is provided in a boss formed integrally with a nonmagnetic material and a hole provided in the magnetic material, and the nonmagnetic material and the magnetic material are fastened by caulking. The pan for IH heating devices according to claim 1, wherein a concave portion is provided in advance in a magnetic body around the convex portion of the boss head portion after crimping. The IH heating apparatus according to claim 1 or 2, wherein at least two kinds of shapes of the plurality of bosses and the shapes of the plurality of holes to be fitted are combined from different shapes such as a polygon, a circle, an oval, and an ellipse. pot. The IH heating device according to any one of claims 1 to 3, wherein a boss head after crimping is made larger than a hole fitting with the boss, and the boss head covers a clearance between the boss and the hole. pot. The pan for the IH heating device according to any one of claims 1 to 4, wherein the end surface of the hole to be fitted with the boss is subjected to an end surface treatment so that the clearance near the boss head after crimping is larger than the far side. . The IH heating apparatus pan according to any one of claims 1 to 5, wherein the clearance between the boss and the hole to be fitted does not make the entire circumference uniform.

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