JPH08180969A - Pan for induction heating cooker - Google Patents

Abstract

PURPOSE: To make the bottom surface of a vessel part always abut on the top plate of an induction heating cooker from the heating start condition to the heating swelling condition of a vessel body by making the bottom surface of the vessel part have two stages with a tilted stepped part low in the center part side interposed. CONSTITUTION: A through hole 12, having the size of a radius or shorter, is formed on the middle of a main body 11, formed of nonmagnetic stainless and having the size of a diameter of 25-36cm, and also a connecting part 13, folded upward and folded back downward to be adopted as the inner peripheral surface of the through hole 12, is formed on the peripheral part of the through hole 12. A tilted stepped part 16, for boosting an inner side bottom surface 15 closer to the center side than an outer peripheral side bottom surface 14, is provided on a place having a bottom surface having a diameter of about 15cm. A level difference, between outer peripheral side and inner side bottom surfaces 14 and 15, is made 5mm or shorter, and the inner side bottom surface 15 is set so as to be positioned downward than the crest (a) of the tilted stepped part 16 by the expansion of a vessel part 1 at the time of cooking and heating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking pot using a tabletop electromagnetic cooker as a heating source, and more particularly to a pot made of non-magnetic stainless steel (SUS304).

[0002]

2. Description of the Related Art An electromagnetic cooker has a spiral heating coil.
A high frequency current of 0 to 50 kHz is supplied, a radial magnetic flux is generated from the center of the spiral, an eddy current is generated on the bottom surface of the pan on the top plate (pot mounting table), and the pan itself generates heat due to the Joule heat of the eddy current. It is used for cooking. Therefore, generally, an iron pot or a magnetic stainless pot which is a magnetic material and has a large electric resistance is used. Of course, non-magnetic stainless steel (18-
8 Stainless steel: SUS304) A pan can also be used as a pan for an electromagnetic cooker, but the heating power is reduced.

The electromagnetic cooker is one in which a pot is placed on a flat top plate, but the bottom of the pot bulges and the pot becomes unstable due to aging due to repeated heating and expansion. Therefore, as shown in Japanese Utility Model Publication No. 62-3044, the central bottom portion of the pot is recessed so that the outer peripheral portion of the pot contacts the top plate of the cooker.
It has been proposed to eliminate the occurrence of an unstable state of the pot due to bulging of the pot itself during heating.

[0004]

The pot whose center portion of the pot bottom is simply recessed as described above can be applied to iron pots and magnetic stainless pots that are easily heated by induction, and non-magnetic stainless pots with poor induction heating efficiency. Does not apply to. That is, it is difficult to design in advance such a size that the bottom surface comes into close contact with the top plate of the cooker during thermal expansion of the pan during heating. Therefore, in order to prevent rotation of the pot, only the peripheral portion of the pot is in contact with the top plate with the central portion of the pot recessed even if thermal expansion occurs.

However, in a non-magnetic stainless steel pot, sufficient heating cannot be obtained if only the outer peripheral bottom surface side with a low magnetic flux density is in contact with the top plate. On the other hand, if the entire bottom surface is formed in contact with the top plate in order to enhance heating efficiency, the container becomes unstable due to expansion of the container bottom surface during heating. Therefore, the present invention proposes a pan made of non-magnetic stainless steel that can efficiently use the electromagnetic cooker.

[0006]

A pan for an electromagnetic cooker according to the present invention has a bottom surface of a container portion made of non-magnetic stainless steel (SUS304) and a slanted paragraph portion having a low central portion at a radius of about 15 cm. In particular, the difference between the inner and outer bottom surfaces of the container is 5 mm or less, and the inner bottom surface is located below the ridge of the inclined paragraph due to expansion of the container during cooking and heating. It is characterized by setting.

In the pan for an electromagnetic cooker, a chimney portion having a bottom penetrating portion having a diameter of at least about 5 cm and penetrating up and down the container portion is provided in the center of the container portion, or a through hole is formed in the center of the container portion. At the same time, it is bent upward around the through hole and folded back downward to form a joint part which is the inner peripheral surface of the through hole, while the lower part is formed with a chimney part sized so that it can be tightly inserted into the joint part. The lower portion of the chimney portion is fitted and welded to the portion to form a pot for shabu-shabu.

[0008]

When the pot is used in an electromagnetic cooker, an eddy current is generated at the bottom of the container by electromagnetic induction, and the bottom of the container is heated by Joule heat to be used for cooking. When the bottom surface of the container expands due to heating, the outer peripheral side of the container part separates from the top plate, but the ridges of the inclined paragraphs (contact points with the top plate) are always in contact with the top plate, and Since the contact portion is a portion where the magnetic flux density is sufficiently high, the heating power does not decrease.

Further, by providing a chimney portion having a diameter of 5 cm or less at the center of the pan, a shabu-shabu pan with a small leakage flux and efficient electromagnetic induction heating can be provided corresponding to the heating coil shape of the electromagnetic cooker.

[0010]

EXAMPLES Next, examples of the present invention will be described. The embodiment shows a pan for an electromagnetic cooker, which is a shabu-shabu pan, and is composed of a pan body composed of a container part 1 and a chimney part 2, and a lid 3.

The container part 1 and the chimney part 2 are formed separately, and the container part 1 has a through hole 12 having a diameter less than the radius formed in the center of a main body 11 having a diameter of 25 to 36 cm.
Around the periphery of the through hole 12, a joint portion 13 is formed which is bent upward and folded back downward to form the inner peripheral surface of the through hole 12, and further, the bottom surface is located at a portion having a diameter of about 15 cm from the outer peripheral side bottom surface 14 to the central portion side. The slanted paragraph portion 16 that raises the inner bottom surface 15 is provided, and the step between the outer peripheral side bottom surface 14 and the inner bottom surface 15 is
It is set to a range of about 5 mm or less, and the inside bottom surface 15 is positioned below the peak a of the inclined paragraph 16 due to expansion of the container 1 during cooking and heating.

The lower portion 21 of the chimney portion 2 is the joint portion 1 described above.
It is formed in a size that can be tightly inserted in 3. Then, the lower portion 21 of the chimney portion is fitted and welded to the joint portion 13 to form a pot.
Then, the things to be cooked, such as the seasoning liquid A, are put in the container part 1 and placed on the top plate B of the tabletop electromagnetic cooker,
When the cooker is energized, the magnetic flux generated by the spiral heating coil is radiated from the center of the heating coil, passes through the bottom surface of the container portion 1, and is concentric with the bottom surface of the container portion 1 in response to changes in the magnetic flux. An eddy current flows, the container part 1 is heated by Joule heat of the eddy current, the seasoning liquid A is boiled, and shabu-shabu dishes and other pot dishes are cooked.

In particular, a paragraph 16 is provided at a location with a diameter of 15 cm to effectively introduce a magnetic flux into the container, and the expansion of the bottom of the container 1 at the time of heating is also as shown in FIG. Even if the outer peripheral side bottom surface 14 warps to the outer peripheral side and the inner bottom surface 15 also swells, the peak a of the paragraph 16 is always in contact with the top plate B, so that efficient heating can be performed without any trouble, and The inconvenience of lack of stability of the container portion due to bulging does not occur.

Further, since the penetrating area of the chimney portion 2 is made small, the decrease in heat generation efficiency is very small, no trouble occurs in cooking, and particularly, the lower portion 21 of the chimney portion 2 and the joint portion 12 are fitted together. Since the welding is performed in the state, the welding work is easy, and since the welding portion has a diameter of 5 cm or less and does not generate heat in the range where eddy current does not flow, there is an advantage that there is little secular change in the welding portion.

The present invention is also applicable to a pan having no chimney portion 2 in a container, and whether or not to provide the chimney portion can be arbitrarily determined.

[0016]

As described above, according to the present invention, the bottom surface of the container made of non-magnetic stainless steel (SUS304) has a radius of 1 mm.
In an induction cooker pan that has a two-stage structure with an inclined paragraph with a low central part at a position of about 5 cm, the location where the magnetic flux is most efficiently introduced changes from the heating start state of the container body to the heating swelling state. Since it is always brought into contact with the top plate of the electromagnetic cooker, even if it is made of a material whose dielectric efficiency is not good, efficient heating can be realized.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention.

FIG. 2 is an exploded sectional view of each member.

FIG. 3 is a sectional view of the same.

FIG. 4 is an explanatory view of the same heating state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container part 11 Main body 12 Through hole 13 Joint part 14 Outer peripheral side bottom surface 15 Inner bottom surface 16 Inclined paragraph part 2 Chimney part 21 Lower part 3 Lid body

Claims (4)

[Claims] 1. A pan for an electromagnetic cooker, characterized in that the bottom surface of the container portion made of non-magnetic stainless steel (SUS304) has two stages with an inclined paragraph portion having a low central portion at a position of a radius of about 15 cm. . 2. The pan for an electromagnetic cooker according to claim 1, wherein the difference between the inner bottom surface and the outer bottom surface of the container portion is 5 mm or less, and the inner bottom surface is inclined due to the expansion of the container portion during cooking and heating. A pan for an electromagnetic cooker, which is set in the range located below. 3. The pan for an electromagnetic cooker according to claim 1 or 2, further comprising a chimney portion, which has a diameter of at least 5 cm and which penetrates the bottom of the container portion, is provided at the center of the container portion. Characteristic induction cooker pot. 4. The pan for an electromagnetic cooker according to claim 3, wherein a through hole is formed in the center of the container portion, and is bent upward around the through hole and then folded back downward to form an inner peripheral surface of the through hole. And a lower portion of the chimney is formed by fitting and welding the lower portion of the chimney to the joint. .