JPH09187370A - Cooking vessel for electromagnetic cooking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-insulating cooking vessel for electromagnetic cooking which has a satisfactory heating efficiency and can precisely detect the temperature. SOLUTION: A circumferential side part has a double structure formed of an inner tank 16 and an outer tank 17, a heat insulating part 18 is formed by vacuuming the space between both the tanks 16,17, or interposing a vacuum heat insulating body between the both, a bottom part has a single structure, and at least the bottom part is made magnetic, whereby necessary heat insulating property is ensured by the circumferential side part. The bottom part is thus adjacent to the heating coil 14 and temperature sensor 15 of an electromagnetic cooker 12 without through the heat insulating part, so that the efficiency of eddy current generation by electromagnetic induction is improved more than a conventional one, and the temperature of the heat generated in the bottom part can be also precisely detected.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cooking container for an electromagnetic cooker having a heat insulating property.

[0002]

2. Description of the Related Art Conventionally, an electromagnetic cooker uses a cooking container made of a magnetic material such as an enameled pot, an iron pot, and a stainless steel pot. The cooking container placed on the top plate has a bottom portion. An eddy current is generated by electromagnetic induction, and Joule heat is generated by the eddy current and the electric resistance of the container bottom material, and the heat is used for cooking.

[0003] However, the cooking container used in such an electromagnetic cooker is a pot which is generally commercially available, and there are some special pots, but in any case, it has no heat insulating property. . On the other hand, actual development 61-141
As shown in FIG. 4, what is disclosed in Japanese Patent Publication No. 797 is a double wall structure composed of an inner container 1 and an outer container 2, and a space 3 between the two containers 1 and 2 is vacuum-insulated from a glass container. It has a heat insulating property.

[0004]

According to the above,
Since the cooking heat in the cooking container does not escape to the outside, the heat efficiency is good and the power consumption can be saved, and the boiling cooking etc. can be done by turning off the electricity after boiling cooking. It has the advantage that it does not feel hot and that it retains good heat after cooking.

However, as a member for generating an eddy current corresponding to the heating coil 5 of the electromagnetic cooker 4, a thin film 6 made of a magnetic material is provided on the outer surface of the bottom of the inner container 1. Since there is a space 3 between the two containers 1 and 2 below, the thin film 6 separates from the heating coil 5 and the generation efficiency of the eddy current is poor, and thus the heating efficiency during cooking is poor. It was

In addition, a temperature sensor (not shown) for detecting the heat generated in the thin film 6 in the electromagnetic cooker 4 and controlling the heat.
However, even with respect to this temperature sensor, the thin film 6 is separated in the space 3 between the containers 1 and 2, and since the space 3 is a vacuum heat insulation space, the desired temperature cannot be detected, and thus the heating is not performed. There was a problem that cooking could not be done well.

The present invention has been made in view of the above circumstances. Therefore, an object of the present invention is that it has heat insulating properties, and has good heating efficiency, accurate temperature detection, and good cooking efficiency. To provide a cooking container for a cooker.

[0008]

In order to achieve the above object, in the cooking container for the electromagnetic cooker of the present invention, the first
In addition, the bottom part is a tubular structure, the peripheral side part has a double structure of an inner tank and an outer tank, and a vacuum is provided between the both tanks or a vacuum heat insulating member is loaded between the both tanks to form a bottom part. Is a single layer, and at least its bottom has magnetism. According to this first means, the necessary heat insulating property is secured on the peripheral side portion, and the bottom portion is close to the heating coil and the temperature sensor of the electromagnetic cooker without the heat insulating portion.

Secondly, the cooking container for an electromagnetic cooker of the present invention is characterized in that the inner tank is made of a magnetic material and the outer tank is made of a non-magnetic material. According to the second means, the inner tank contributes to the generation of the eddy current due to the electromagnetic induction, and thus the heat of cooking, and the outer tank does not contribute to the generation of the heat of cooking.

Thirdly, in the cooking container for an electromagnetic cooker according to the present invention, thirdly, the bottom portion has a portion where the temperature is detected from the outside.
It is characterized in that it comes into contact with or almost comes into contact with a member on the temperature detecting side. According to the third means, the temperature of the heat generating portion can be detected more accurately by the temperature sensor of the electromagnetic cooker.

Fourthly, the cooking container for an electromagnetic cooker according to the present invention is characterized in that it is provided with an outer case for covering a peripheral portion of a bottom portion from a peripheral portion of the outer tub. According to the fourth means, the heat insulation of the peripheral side portion is improved. Fifthly, the cooking container for an electromagnetic cooker of the present invention is characterized in that a space exists between the outer case and the outer tub. According to the fifth means, the heat insulation of the peripheral side portion is further enhanced.

Sixthly, the cooking container for the electromagnetic cooker of the present invention is characterized in that the lower edge portion of the double tank portion is located above the bottom portion by a predetermined dimension. According to the sixth means, electromagnetic induction is prevented from reaching the double tank portion, particularly the outer tank.

Seventhly, the cooking container for the electromagnetic cooker of the present invention is characterized in that a magnetic shielding member is provided at the lower edge of the double tank portion. Also by this seventh means, electromagnetic induction is prevented from reaching the double tank portion, particularly the outer tank.

Eighthly, the cooking container for an electromagnetic cooker according to the present invention is characterized in that a bottom cover is provided below the portion of the bottom portion where the temperature is detected from outside and the portion excluding the peripheral portion thereof with a space therebetween. . According to the eighth means, the heat insulating property of the bottom portion can be enhanced as much as possible.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows a cooking container 11 for an electromagnetic cooker together with an electromagnetic cooker 12. Of these, the electromagnetic cooker 12 has a heating coil 14 and a temperature sensor 15 on the lower surface of the top plate 13, and the temperature sensor 15 is located at the center of the heating coil 14.

On the other hand, the cooking container 11 has a bottomed tubular shape as a whole, and has an inner tank 16 and an outer tank 17, of which the inner tank 16 has a bottomed tubular shape. On the other hand, the outer tank 17 has a tubular shape, and the upper end of the outer tank 17 is
By brazing the lower end of the outer tub 17 to the lower end of the circumferential side of the inner tub 16 to the upper end of the cooking container 1,
1. The peripheral side part as a whole has a double structure. Also, the peripheral side of the tanks 16 and 17 is evacuated by
The heat insulating portion 18 is used.

The bottom of the cooking vessel 11 as a whole is a single layer of the bottom of the inner tank 16, that is, in this case,
The bottom of the cooking vessel 11 as a whole is integrally formed with the inner tank 16 to form a single layer. The inner tank 16 is made of a magnetic material such as SU.
The outer tank 17 is made of magnetic stainless steel such as S430.
Is made of a non-magnetic material, for example, non-magnetic stainless steel such as SUS304.

Further, the bottom of the cooking container 11 as a whole is
The electromagnetic cooker 12 which is a portion whose temperature is detected from the outside
From the portion corresponding to the temperature sensor 15 to the portion 11a corresponding to the heating coil 14 are formed in a flat shape, and are almost in contact with the top plate 13 which is the member on the temperature detecting side (1
It has a slight gap of about [mm]). The flat portion 11a may be in contact with the top plate 13. The lower edge of the double tank portion including the outer tank 17 and the inner tank 16 is located above the bottom of the entire cooking container 11 by a predetermined dimension L.

In addition, from the peripheral portion of the outer tub 17 to the cooking container 1
1 To the peripheral part of the bottom of the whole (bottom of the inner tank 16),
An outer case 19 that covers these is attached. The outer case 19 is made of a material that has heat resistance and can be thinly formed, for example, polyphenylene sulfide (PPS), and the combined body of the inner tank 16 and the outer tank 7 is placed in a molding die to surround it. By insert molding in which the molten material is injected into the cavity and solidified, the inner tank 16 and the outer tank 7 are joined and integrated.

A handle 20 for carrying is integrally formed on the upper portion of the outer case 19, and the width between the outer case 19 and the outer tub 17 is, for example, about 1 to 3 [mm]. There is a space 21 of.

A lid 22 is provided for the entire cooking container 11. The lid 22 is made of a heat-resistant material such as an inner lid plate 23 made of polymethylpentene (TPX) or polypropylene (PP) and an outer lid plate 24 made of the same material. The lid 22 is hollow, and a heat insulating material such as glass wool is provided inside the lid 22. It is filled with 25 and has a heat insulating property. The lid 22 has a steam port 26 penetrating above and below (inside and outside of the cooking container 11), and a steam release control valve 27 is provided at the steam port 26.

Now, in the case of the configuration as described above,
Cooking container 11 on top plate 13 of electromagnetic cooker 12
When cooking is started with placing the, the high-frequency current is passed through the heating coil 14 to generate a high-frequency magnetic field passing through the bottom of the cooking container 11, and thereby an eddy current is generated at the bottom of the cooking container 11, and this eddy current is generated. And Joule heat is generated by the electric resistance of the material at the bottom of the cooking container 11, and the heat is used for cooking.

However, in this case, the peripheral side portion of the cooking container 11 has a double structure including the inner tank 16 and the outer tank 17, and
Insulation part 1 by creating a vacuum between both tanks 16 and 17
Therefore, the necessary heat insulation is ensured at this peripheral side portion, so that the cooking heat in the cooking container 11 does not escape to the outside, the thermal efficiency is good and the power consumption can be reduced, and the outer surface of the cooking container 11 can be saved. It has the advantage that it does not feel hot to the touch, and it also has good heat retention after cooking.

On the other hand, the bottom of the cooking container 11 is a single layer, and is close to the heating coil 14 of the electromagnetic cooker 12 without a heat insulating portion as in the conventional one, and therefore, the electromagnetic induction from the heating coil 14 is made. The efficiency of generating an eddy current due to can be improved as compared with the conventional one, and by extension, the heating efficiency at the time of cooking can be improved. Also, in this case, the cooking container 1
The bottom of 1 is close to the temperature sensor 15 of the electromagnetic cooker 12 without a heat insulating portion, and thus the cooking container 1
The temperature of the heat generated at the bottom of 1 can be accurately detected, and the cooking can be performed well.

In addition, particularly in the case of the above-mentioned structure, since the inner tank 16 of the double tank portion is made of a magnetic material and the outer tank 17 is made of a non-magnetic material, the inner tank 16 is swirled by electromagnetic induction. It contributes to the generation of electric current, and thus the heat of cooking,
Does not contribute to the generation of cooking heat, and by these, the heating efficiency during heating and cooking can be further improved, and the outer surface of the cooking container 11 can be prevented from feeling hotter.

Further, since the bottom of the cooking vessel 11 is constructed integrally with the inner tank 16, compared to the case where they are constructed separately and are joined together, there is no leakage of juice from the joined portion. Can be used. Further, in the bottom portion of the cooking container 11, a portion 11a including a portion whose temperature is detected from the outside is contacted or almost contacted with the top plate 13 of the electromagnetic cooker 12 which is a member on the temperature detection side. Therefore, the temperature of the heat generating portion can be detected with higher accuracy, and the cooking can be performed more efficiently.

In addition, since the outer case 19 covering the peripheral portion of the outer tub 17 and the peripheral portion of the bottom of the entire cooking container 11 (bottom of the inner tub 16) is mounted, the heat insulating property of the peripheral side portion is provided. It is possible to improve the heating efficiency, improve the heating efficiency, prevent the external surface from being touched by the hand, and improve the heat retention after cooking.

Moreover, in this case, the outer case 19 and the outer tank 1
Since there is a space 21 between the outer peripheral part and the outer peripheral part 7, it is possible to further improve the heat insulating property of the peripheral side part, and therefore, the heating efficiency, the heat of the outer surface, and the heat retaining property after cooking can be further improved. . Further, by arranging the lower edge of the double tank portion to be above the predetermined size L from the bottom of the entire cooking container 11, it is possible to prevent electromagnetic induction from reaching the outer tank 17 of the double tank portion, This can also reduce the heat of the outer surface.

Further, since the cooking container 11 is provided with the lid 22 having a heat insulating property, the heating efficiency can be improved also by this. Further, since the carrying handle 20 is integrally formed on the outer case 19, there is no need for troublesome connection by screws, rivets or the like, and the manufacturability can be improved.

In contrast to the above, FIG. 2 shows a second embodiment of the present invention, in which the above-mentioned outer case 1 is provided on the outer circumference of the cooking container 11.
Instead of providing 9, the outer portion 1 of the bottom of the cooking container 11 excluding the portion where the temperature is detected from the outside (the portion corresponding to the temperature sensor 15 of the electromagnetic cooker 12) and its peripheral portion.
Below the 1b, a space 31 having a width of, for example, about 7 [mm] or less
, For example, polyphenylene sulfide (PP
The bottom cover 32 made of S) is provided.

By doing so, the cooking container 1
While keeping the heating efficiency of No. 1 good, the heat insulating property of the bottom part can be improved, and the heating efficiency, the heat of the outer surface, and the heat retaining property after cooking can be improved. Further, in this case, a magnetic shielding member, for example, a magnetic rubber 33 is provided at the lower edge of the double tank portion of the cooking container 11, which also causes electromagnetic induction to the outer tank 17 of the double tank portion. Is avoided, the heat of the outer surface can be reduced.

FIG. 3 shows a third embodiment of the present invention.
The outer case 19 is removed from the outer circumference of the cooking container 11, the bottom cover 32 is removed from the bottom, and the magnetic rubber 33 is removed from the lower edge of the double tank portion. Even in this case, basically the same operation and effect as the first embodiment can be obtained.

The thermal insulation of the peripheral side portion of the cooking container 11 is not limited to the one in which the inner tank 16 and the outer tank 17 are evacuated, and a vacuum heat insulator is loaded between the both tanks 16 and 17. It may be. The vacuum heat insulating material is, for example, a fine powder having heat insulating properties such as pearlite or silica, or a filler made of waste paper is put inside an air permeable inner bag to be sealed, and then a non-air permeable outer body is sealed. Put inside, in this state, vacuum the air in the exterior body from the mouth and discharge it, then,
The mouth of the exterior body is sealed by means such as thermocompression bonding so as to be airtight.

Also, the heat insulating property of the lid 22 is not limited to the one using the heat insulating material 25 such as glass wool, and the cooking container 1
A vacuum or vacuum heat insulator similar to the peripheral side portion of 1 may be used. Furthermore, as a concrete type of the cooking container 11,
Mainly the pot, but besides that, a kettle (pot),
It may be a canister, a pot, a coffee maker, a mug, or the like. In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

[0035]

The present invention is as described above.
The following effects are obtained. According to the cooking container for the electromagnetic cooker of the first aspect, since it has heat insulation properties, the heating efficiency can be improved, and the temperature can be detected accurately, so that the cooking can be performed well.

According to the cooking container for the electromagnetic cooker of the second aspect, the heating efficiency at the time of heating and cooking can be further improved, and the outer surface of the cooking container can be prevented from feeling hotter. According to the cooking container for the electromagnetic cooker of claim 3,
It can be used without causing leakage of juice.

According to the cooking container for the electromagnetic cooker of the fourth aspect, the temperature of the heat-generating portion can be detected with higher accuracy, and the heating and cooking can be carried out more efficiently. Claim 5
According to the cooking container for the electromagnetic cooker, the heat insulating property of the peripheral side portion can be enhanced, and the heating efficiency can be further improved, and
You can make it feel even hotter when you touch the outside,
The heat retention after cooking can be further improved.

According to the sixth aspect of the cooking container for the electromagnetic cooker, the heat insulating property of the peripheral side portion can be further enhanced.
The heating efficiency, the heat of the outer surface, and the heat retention after cooking can be further improved. According to the cooking container for an electromagnetic cooker of claim 7, it is possible to prevent electromagnetic induction from reaching the outer tub of the double tub portion, and to reduce the heat of the outer surface.

Also in the cooking container for the electromagnetic cooker according to the eighth aspect, it is possible to prevent electromagnetic induction from reaching the outer tub of the double tub portion, and to reduce the heat of the outer surface. According to the cooking container for the electromagnetic cooker of the ninth aspect, it is possible to enhance the heat insulating property of the bottom portion while maintaining the good heating efficiency, and it is possible to improve the heating efficiency, the heat of the outer surface, and the heat retaining property after cooking.

According to the cooking container for an electromagnetic cooker of the tenth aspect, the heating efficiency can be further improved by the heat insulating property of the lid. According to the eleventh aspect of the cooking container for an electromagnetic cooker, it is possible to improve the productivity without the need for complicated attachment of the carrying handle to the outer case.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a third embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

Reference numeral 11 is a cooking container, 11a is a portion including a portion of the bottom of the cooking container where temperature is detected, 12 is an electromagnetic cooker, 13 is a top plate (a member on the temperature detection side), 14 is a heating coil,
15 is a temperature sensor, 16 is an inner tank, 17 is an outer tank, 18 is a heat insulating part, 19 is an outer case, 20 is a handle, 21 is a space, 22
Is a lid, 25 is a heat insulating material, 31 is a space, 32 is a bottom cover, 3
Reference numeral 3 indicates a magnetic rubber (magnetic shield member).

Claims (11)

[Claims] 1. A heat insulating part having a bottomed cylindrical shape, having a double structure with an inner tank and an outer tank on the peripheral side, and making a vacuum between the both tanks or by loading a vacuum heat insulator between the both tanks. The cooking container for an electromagnetic cooker, wherein the bottom has a single layer and at least the bottom has magnetism. 2. The cooking container for an electromagnetic cooker according to claim 1, wherein the inner tank is made of a magnetic material and the outer tank is made of a non-magnetic material. 3. The cooking container for an electromagnetic cooker according to claim 1, wherein the bottom portion is integrally formed with the inner tank. 4. The cooking container for an electromagnetic cooker according to claim 1, wherein the bottom portion is such that a portion whose temperature is detected from the outside is in contact with or almost in contact with the member on the temperature detection side. 5. The cooking container for an electromagnetic cooker according to claim 1, further comprising an outer case that covers a peripheral portion of a bottom portion from a peripheral portion of the outer tub. 6. The cooking container for an electromagnetic cooker according to claim 5, wherein a space exists between the outer case and the outer tub. 7. The cooking container for an electromagnetic cooker according to claim 1, wherein a lower edge portion of the double tank portion is located above the bottom portion by a predetermined dimension. 8. The cooking container for an electromagnetic cooker according to claim 1, wherein a magnetic shielding member is provided at a lower edge portion of the double tank portion. 9. The cooking container for an electromagnetic cooker according to claim 1, wherein a bottom cover is provided below the portion where the temperature is detected from the outside of the bottom portion and the peripheral portion thereof with a space therebetween. 10. The cooking container for an electromagnetic cooker according to claim 1, further comprising a lid having a heat insulating property. 11. The cooking container for the electromagnetic cooker according to claim 5, wherein a handle for carrying is integrally formed on the outer case.