JP2000023839A - Metal pot for electromagnetic cooking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely and closely contact the bottom of a pot with an electromagnetic heater by forming the center part of the bottom of the pot to be a plane and providing an annular recessed part o a size capable of absorbing the deformation of the center part of the bottom of the pot at the time of heating in the center to absorb the thermal expansion of the bottom surface of the pot at the time of electromagnetic cooking to keep the center of the bottom surface to be the plane. SOLUTION: The annular recessed part 2 is provided in the center of the bottom surface of a metal pot 1 (a pot made of iron, stainless or other magnetic metal including a frying pan, or other cooking tool) to absorb the deformation of the pot bottom 1a at the time of electromagnetically heating to keep the plane property of the center of the bottom surface. At this time, it is desirable to provide the part 2 of an arcuate cross section which has 30 mm to 60 mm inner diameter, 3.5 mm to 6.5 mm width and 0.75 mm to 1.2 mm depth in the center of the bottom 1a. At the time of providing the part 2 at the bottom 1a like this way, the plane of the bottom 1a is stable kept without depending on whether the deforming quantity of the bottom 1a is large or not. In addition when the center part of the bottom surface is a plane, a temperature sensor surely operates and an unexpected disaster by heating is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal pot for electromagnetic cooking intended to maintain the flatness of the bottom surface when used as an electromagnetic cooker.

[0002]

2. Description of the Related Art Conventionally, an electromagnetic cooking pot has been proposed in which a concave portion having an arc-shaped cross section is provided at the center of the bottom of the pot so as to prevent the center of the bottom of the pot from being convexly deformed during heating of cooking (Japanese Utility Model Publication No. Sho 62).
-3044).

[0003]

The known pot is
Even if the bottom of the pot is deformed due to thermal expansion during cooking, care is taken not to be convex.However, it is difficult to always deform the concave portion into a flat surface. It is predicted that you have entered.

On the other hand, it is desirable that at least the central portion of the electromagnetic cooking pot is in contact with the contact surface of the electromagnetic heater.
In the above-mentioned known example, it is common that a slight gap is formed.

[0005] In addition, since the metal pan has a different coefficient of thermal expansion depending on the material and a different amount of deformation depending on the wall thickness, the central portion of the pan protrudes downward unless a slightly larger recess is provided. Because of the danger, the known example assumes that a slight gap is formed.

[0006]

However, according to the present invention, since the annular concave portion is provided at the center of the bottom of the metal pan, the center can always be kept flat and the electromagnetic force can be brought into close contact with the upper surface of the heater. At the same time, the annular recess automatically absorbs the thermal expansion of the bottom surface of the pot, so that it can respond properly regardless of the material and thickness.

That is, the present invention is characterized in that a central portion of the bottom of the pot is formed in a plane, and an annular concave portion having a size capable of absorbing deformation of the center of the bottom of the pot during heating is provided in the center. It is a metal pot.

In another invention, the center of the bottom of the pot is provided with an inner diameter of 3 mm.
It is a metal pot for electromagnetic cooking provided with an annular concave portion having an arc cross section of 0 mm to 60 mm, width of 3.5 mm to 6.5 mm, and depth of 0.75 mm to 1.2 mm.

Although one annular recess can sufficiently achieve the purpose, two annular recesses may be used.

In the above, the inner diameter of the annular recess is 30 m
m, the area of the central plane portion becomes small,
If it exceeds mm, there is a possibility that heat deformation at the center of the bottom surface cannot be absorbed.

If the width of the annular recess is less than 3.5 mm, the deformation of the bottom of the pot due to heating may not be absorbed.
If it exceeds 6.5 mm, the area not in contact with the electromagnetic heater may increase.

According to the present invention, the central portion of the bottom of the pot is formed in a plane, so that it is efficiently heated during electromagnetic heating.
The flatness can be maintained by the annular recessed portion even when heated and expanded without fear of impairing the flatness due to thermal expansion during heating. As described above, since the bottom central portion is a flat surface, the temperature sensor works reliably, and an accidental disaster due to overheating can be prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides an annular recess at the center of the bottom of a metal pan (iron, stainless steel or other magnetic metal pan including a frying pan or other cooking device) to prevent deformation of the pan bottom during electromagnetic heating. It absorbs and maintains the flatness of the bottom center.

[0014]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. At the center of the bottom of the 0.5 mm thick iron pan 1, an inner diameter d
Is provided with an annular recess 2 having a width of 50 mm, a width w of 5 mm and a depth h of 1 mm. The diameter D of the bottom is 180 m
m.

When cooking materials were put into the iron pan 1 of the above embodiment and cooked as usual, the flatness of the pan bottom 1a was maintained and was stably supported. FIG. 3 shows the annular recesses 2 and 2a.
Are provided concentrically, and the plane of the pan bottom can be stably maintained regardless of the amount of deformation of the pan bottom 1a.
The annular recesses 2 and 2a can effectively absorb the thermal expansion of the bottom surface and reinforce the bottom surface.

[0016]

According to the present invention, since an annular recess is provided at the center of the bottom of the metal pot, the electromagnetic expansion can be prevented by absorbing the thermal expansion of the bottom of the pot and keeping the center of the bottom flat during electromagnetic cooking. It has the effect of being able to adhere.

Further, since the annular concave portion is provided on the bottom surface, reinforcement is provided, and there is an effect that flatness can be maintained with high accuracy even when the wall thickness is small. In addition, there is an effect that there is no possibility of affecting the sensor of the electromagnetic heater.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view in which one part is also omitted.

FIG. 3 is an enlarged cross-sectional view of another embodiment.

[Explanation of symbols]

 1 Iron pan 1a Pan bottom 2, 2a Annular recess

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H05B 6/12 314 H05B 6/12 314

Claims (2)

[Claims] 1. While forming the center part of the pot bottom in a plane,
A metal pot for electromagnetic cooking, wherein an annular recessed portion having a size capable of absorbing deformation of the pot bottom center portion during heating is provided in the center portion. 2. An inner diameter of 30 mm to 60 m at the center of the pot bottom.
m, width 3.5mm ~ 6.5mm, depth 0.75mm ~
A metal pot for electromagnetic cooking, comprising an annular concave portion having an arc cross section of 1.2 mm.