JP2010147015A - Exoergic utensil holder for electromagnetic cooking range - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple exoergic utensil holer serving as an exoergic body also for an electromagnetic cooking range effectively absorbing magnetic flux and inducing an eddy current, solving the problem wherein conventional cooking utensils, such as, a pan for electromagnetic range has constraints in satisfying the specifications of the electromagnetic cooling range, such as, the shape and area of pan bottom, and the distance between a top plate and the pan bottom and that even if a pan is made of a magnetic metal, it may cannot be used, namely, all the cooking utensils made of the magnetic metal may not always be usable in the electromagnetic cooking range. <P>SOLUTION: The exoergic utensil holder for an electromagnetic cooking range is able to obtain an eddy current which is practicable for use, even when the eddy current tends to be hard to generate or is not generated at all, by forming a ring-shaped structure (utensil holder), with an exoergic portion formed on an inner surface in a shape that satisfies a different shaped pan, made of a magnetic metal so as to compensate for the magnetic permeability of magnetic flux depending on the shape. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention is an iron pot used in an electromagnetic cooker, and the pot to be installed as well as the pot itself catches the magnetic field from the electromagnetic cooker, and the pot is of course an electromagnetic wave that can also be heated by generating an eddy current. The present invention relates to a heat generating bar for a cooker.

Conventional electromagnetic cooking utensils such as electromagnetic pots are limited by the specifications according to the model, such as the shape of the pot corresponding to the specifications of the electromagnetic cooker, that is, the shape of the pot bottom, the area of the pot bottom, the distance between the top plate and the pot bottom. Many pots made of magnetic metal cannot be used, and not all cookware made of magnetic metal can be used in an electromagnetic cooker.

Therefore, the present invention is an exothermic iron pot for an electromagnetic cooker that solves the problems of existing cooking utensils and makes it possible to use an electromagnetic cooker in any shape and size of a pot made of a magnetic metal with a small pan bottom. Was invented by.

The present invention aims at the following (a) to (c).
(A) The present invention is a ring-shaped structure formed of an inorganic material having heat storage and fire resistance such as pottery and diatomaceous earth, and a metal heating element is welded to the inner surface of the ring by a thermal spraying method and is mounted in the ring. The purpose is to provide a heat generating iron for an electromagnetic cooker that is easy to generate eddy currents by combining with an electromagnetic pot.
(B) In the present invention, the metal heating element welded to the inner surface of the ring is heated by Joule heat due to the eddy current by capturing the magnetic flux of the electromagnetic cooker by being formed of a heat storage material. Electromagnetic cooking that can heat the electromagnetic pot with high efficiency by heating the air in the space with the electromagnetic pot and applying radiant heat to the electromagnetic pot. The purpose is to provide dexterous fever.
(C) The present invention increases the apparent area of the heat generating portion by combining a ring-shaped structure having a heat generating portion with a pan made of a magnetic material that prevents the generation of eddy current due to insufficient area. An object of the present invention is to provide a heat generating iron for an electromagnetic cooker that can obtain a typical heat generation.
(D) Although this invention is a ring of the shape along the outer periphery of the electromagnetic pan to mount | wearing, it forms a little larger than an electromagnetic pan, and provides a space between the outer periphery of an electromagnetic pan and the inner surface of a ring. Heat generation for an electromagnetic cooker that takes into account heat energy that is synergistic in addition to heat generation due to eddy currents due to heat storage by air insulation and the flow of air rising from the bottom along the outer periphery of the electromagnetic pan by heating the air in the space The purpose is to provide a good deal.

Means to solve the problem

In order to solve the above problems, a ring-shaped structure (gotoku) with a heat generating part on the inner surface is formed so as to follow a pan of different shape made of magnetic metal, and the magnetic flux permeability due to the shape is increased. By supplementing, it is possible to obtain a practical eddy current when it is difficult to generate eddy current or when eddy current does not occur at all.

The invention's effect

The invention according to claim 1 is a ring-shaped structure (gotoku) with an inner surface formed so as to follow the shape of the outer periphery of the pot to be used, and the material is pottery and diatomaceous earth with excellent heat storage and fire resistance. It is made of an inorganic material.

If the material is made of an inorganic material such as earthenware or diatomaceous earth with excellent heat storage and fire resistance, the heat energy generated during heat generation is stored in a ring-shaped structure (gotok), and a certain temperature can be maintained. .

The accumulated heat becomes a high temperature every time heating is continued, and the radiant heat radiated from the accumulated heat is also strengthened to heat the outer periphery of the separately mounted pan with a gap.

The invention according to claim 2 is a ring-shaped structure (gotoku) formed with an inner surface so as to follow the shape of the outer periphery of the pot to be used, but the structure is 3 to avoid touching the pot to be used. It is characterized by being made with a structure with a gap of about 10 mm.

Providing a space of about 3 to 10 mm is a combination of a ring-shaped structure and a pan to be used. A gap of about 3 to 10 mm is formed between the outer periphery of the pan to be used and the ring-shaped structure (gotok), but when a magnetic flux is applied, the heating element welded to the ring-shaped inner surface generates heat.

The generated heat is stored in a ring-shaped structure (gotoku), and at the same time, the air remaining in the gap is heated by radiant heat, and the warmed air becomes an updraft and induces a convection phenomenon.

The warmed air contributes to heating the side surface of the pan to be used, and it is possible to make up for the drawback that it is difficult to heat the portions other than the heat generating portion, which is a disadvantage of the electromagnetic cooking appliance.

In the invention according to claim 3, when the bottom of the pan formed of a magnetic material is insufficient in area and magnetism does not occur, an eddy current does not occur, but a pan formed of a ring-shaped structure having a heat generating portion and a magnetic material is used. By combining, the area of the heating element is increased to induce the generation of a practical eddy current, and sufficient heating can be obtained.

The ring-shaped structure (gotok) having a heat generating part has a bottom part of a pan formed of a magnetic material with insufficient area necessary to generate eddy currents mounted with a gap, and a ring-shaped structure. It is regarded as an integral part of the heat generating part, the magnetism generation region is made the same, an eddy current flows and heat is generated.

The invention according to claim 4 relates to a heating element metal provided on the inner surface of a ring-shaped structure (gotok), and has a good supporting property between the material forming the structure (inorganic such as earthenware or diatomaceous earth) and the heating metal. It is characterized in that aluminum or an alloy of nickel and aluminum having excellent heat resistance is used as a heating element, and any one of them deposited by a thermal spraying method is used as a heating element.

Attaching a metal to an inorganic material such as earthenware or diatomaceous earth has a drawback that it is very vulnerable to heat shock due to the difference between the expansion coefficient of the inorganic material and the expansion coefficient of the exothermic metal.

The thermal expansion coefficient of inorganic materials such as pottery is about 8-9 × 10 −6 / K, aluminum as a heat generating metal is 23.2 × 10 −6 / K, and nickel is 12.7 × 10 −6 / K. K, and the alloy of nickel and aluminum falls within the range of the sum of the coefficients of both, although it varies depending on the blending ratio.

When this coefficient is compared, it seems that the coefficient is far from the minerals such as ceramics, but when the metal is supported on the ceramics or inorganic substrate by the actual spraying method, the strength and hardness of the substrate are more than the expansion coefficient. The softness of the exothermic metal greatly affects the adhesion.

Inorganic materials such as ceramics have a smaller expansion coefficient than metals, and are inferior in strength and hardness to metals. Even if different kinds of components having different characteristics are welded together by the thermal spraying method, the adhesion is weak because the adhesion is only on the surface.

If the degree of adhesion is weak, it can be handled during heating but not during cooling. During cooling, a metal having excellent heat conduction is cooled and contracts immediately, but conversely, ceramics and inorganic materials having excellent heat storage properties have a low coefficient of thermal expansion and are difficult to cool.

The difficulty in cooling is that the shrinkage time is delayed and a time lag occurs between the deposited metal and a peeling phenomenon occurs.

However, if an inorganic material such as earthenware has a strength or hardness higher than that of metal, a time lag occurs in the cooling time, and even if stress due to heat shock is applied, if the metal is flexible, The inorganic substance absorbs stress and the peeling phenomenon is suppressed.

The invention according to claim 5 is characterized in that it has a protective film for preventing damage to the heat generating portion due to dirt adhering to the heat generating metal and permeating moisture.

The dirt adhering to the heat generating part is carbonized (burned) with heating, and the resistance value of that part changes, leading to abnormal heat generation.

Further, the permeating moisture oxidizes the heating element and penetrates into and penetrates pores generated at the time of thermal spraying and penetrates to an inorganic base material such as pottery. Then, the infiltrated moisture expands with heating, leading to a water vapor explosion.

In order to prevent these phenomena, after the heating element is welded, as a sealing treatment, a ceramic and glass mixture prepared by the sol-gel method is applied in a form covering the heating element and dried to gel, Sinter to form a film.

The glassy material of the film after sintering has water repellency and antifouling properties because the surface forms a polysiloxane bond and forms a helical structure. The reason for mixing ceramic is to accelerate gelation.

Embodiments of the present invention are shown in FIG. 1, FIG. 2, FIG. 3, FIG. First, an outline of the electromagnetic heat generating bar in FIG. 1 will be described.

FIG. 1 shows a ring-shaped structure (Gotok) 1 made of an inorganic material such as pottery and diatomaceous earth, a heating element 2 welded to the inner surface of the ring-shaped structure (Gotok) 1 by a thermal spraying method, and And a glassy protective film 3 covered with a cover.

In addition, in the lower part of the ring-shaped structure (gotoku) 1, several heat exhaust grooves 4 are provided to release heat radiated to the electromagnetic cooker, and also on the upper circumference. For the same purpose, an exhaust groove 5 is provided. However, the exhaust groove 5 on the upper circumference may not be provided.

When actually used, the ring-shaped structure (Gotok) 1 is combined with a magnetic metal drawn with imaginary lines or a pan 6 formed by adhering a magnetic material without using it alone. Used.

FIG. 2 is a cross-sectional view showing the relationship between the ring-shaped structure (gotok) 1 and the pan 6 to be mounted. Through this cross-sectional view, the relationship between the ring-shaped structure (Gotok) 1, the magnetic body to be mounted, and the pan 6 in close contact with the magnetic body will be described.

The inner periphery (inner surface) 7 of the ring-shaped structure (gotok) 1 is processed into a shape along the outer periphery (outer surface) 8 of the pan 6 to be mounted.

The ring-shaped structure (Gotok) 1 and the pan 6 to be mounted are configured such that a gap 9 of 3 to 10 mm is formed between the two at the stage of mounting.

If the ring-shaped structure 1 with such a gap 9 interposed therebetween and the pan 6 to be mounted are installed, the heat energy heated in an independent manner is once insulated with the gap 9 interposed therebetween. However, by the heat energy obtained independently, one ring-shaped structure (Gotok) 1 once accumulates the heat energy heated from the material (inorganic materials such as pottery and diatomaceous earth) and makes it difficult to escape to the outside.

However, the heat energy stored with the passage of time becomes radiant heat and is radiated to the outer periphery of the pan 6 mounted. The generation of eddy currents due to the influence of the magnetic flux in the pan 6 is applied only to the bottom of the pan 6 and heat is generated only at the bottom, and the heating area is small and the rate is high. However, since the side surface of the pan 6 is heated by the radiant heat from the ring-shaped structure (Gotok) 1, the heating rate increases.

Moreover, when the bottom of the mounted pan 6 is heated by electromagnetic induction, the surrounding air is heated and the heated air becomes a rising air flow 10 through the gap 9 between the ring-shaped structure (gotok) 1 and the pan 6. It leads to heating the side of the pan 6 mounted more efficiently.

FIG. 3 is a similar cross-sectional view, but describes the relationship between the ring-shaped structure (gotok) 1 and the pan 11 to be mounted as the aforementioned catch.

The pan 6 outlined in FIG. 2 is a normal-shaped pan 6, and the pan 11 described in FIG. 3 has a shape in which ring-shaped folds are wound around the edge of the pan as seen in a blade pot or the like. Thus, the present invention relates to a ring-shaped structure (Gotok) 1 when the pan 11 having such a shape is mounted.

The ring-shaped structure (Gotok) 1 and the pan 11 to be mounted are mounted with a certain gap 9 in the same manner as the pan 6 having a normal shape. The shape is formed along the outer periphery 8 of the pan to be mounted.

The difference from the ring-shaped structure (Gotok) 1 to which the normal pan 6 is attached is the structure of the place where the pan 11 to be attached and the ring-shaped structure (Gotok) 1 are in contact. In the case of the normal pan 6 and the ring-shaped structure (gotok) 1, a fixed gap 9 is formed when it is attached, and the heated air becomes an ascending air flow 10 and is exhausted from the upper gap 9.

However, when the pan 11 to be mounted is mounted, since there is a pleat 12 on the outer periphery of the pan 11, the pan 9 is blocked at a place where the gap 9 contacts. Then, there is no escape space for the air that is heated to rise, the air in the gap 9 stays and becomes high temperature, the sensor installed for preventing the heating works, and the operation of the electromagnetic cooker is stopped.

In order to prevent this, an effective exhaust heat can be obtained by providing the exhaust groove 5 on the upper surface of the ring-shaped structure (gotk) 1.

FIG. 4 describes an operation mode of the exciting coil 13, the high-frequency magnetic flux 15, the generation region of the eddy current 17, and the like when the ring-shaped structure (Gotok) 1 and the pan 6 to be mounted are mounted.

The exciter coil 13 and the top plate 14 are changed, and the ring-shaped structure (gotok) 1 is installed on the top plate 14. In addition, the pan 6 is mounted in the inserted ring-shaped structure (gotok) 1 so as to be inserted.

When the ring-shaped structure (gotok) 1 and the pan 6 to be inserted are installed in combination, the heating element 2 of the ring-shaped structure 1 and the inserted pot bottom are usually out of the range of the high-frequency magnetic flux 15. When the area of 16 is integrated and a high frequency current is passed through the exciting coil 13, a high frequency magnetic flux 15 is generated on the exciting coil 13, and an eddy current is generated on the heating element 2 of the ring-shaped structure (gotok) 1 and the pan bottom 16. 17 can be generated and heated simultaneously.

FIG. 5 describes the outline of the heating element 2 welded to the inner surface of the ring-shaped structure (Gotok) 1, and the protective film 3 made of ceramic and glass so as to cover it.

The ring-shaped structure (Gotok) 1 is formed of an inorganic material such as earthenware or diatomaceous earth, and has an inner surface of either nonmagnetic aluminum or a ferromagnetic nickel alloy and a nonmagnetic aluminum alloy. The heating element 2 is used for welding by a thermal spraying method.

For the heating element 2, select aluminum or nickel-aluminum alloy according to the temperature range to be used. As a selection criterion, aluminum is used when used in the region of 350 ° C or lower, and nickel is used when used in the high temperature region of 350 ° C or higher. Use aluminum alloy.

After the heating element 2 is welded to the inner surface of the ring-shaped structure (Gotok) 1, the ceramic and glassy solution produced by the sol-gel method is applied for the purpose of sealing treatment, dried and gelled, fixed, and heat treated. To form the protective film 3. The protective film 3 thus formed is excellent in antifouling properties and water repellency.

Embodiment diagram of heat generation for electromagnetic cooker Sectional view showing mounting of a general-purpose pan Sectional view showing the installation of a pan (ring hook, etc.) with ring-shaped folds on the edge Explanatory drawing which shows typically operation | movement of the heat generating iron for an electromagnetic cooker Sectional view showing heating element and protective coating

Explanation of symbols

1 ring-shaped structure (Gotok)
2 Heating element 3 Protective film 4 Exhaust heat groove 5 Exhaust groove 6 Electromagnetic pot with magnetic material and magnetic material in close contact 7 Inner circumference (inner surface)
8 outer circumference (outer surface)
9 gaps (space)
10 Ascending current 11 Pot with a flange such as a blade pot 13 Fold 13 Excitation coil 14 Top plate 15 High frequency magnetic flux 16 Pan bottom 17 Eddy current

Claims (5)

An exothermic iron for an electromagnetic cooker, in which an exothermic metal is deposited on the inner surface of a ring-shaped structure made of earthenware or diatomaceous earth that has excellent heat storage and fire resistance along the shape of the pan. The ring-shaped structure described in claim 1 has a shape along the shape of the pan, but the ring and the pan are provided with a certain space, and the air in the space is radiated by heat during heating. A heat generating iron for an electromagnetic cooker that is shaped to be heated. Combining the ring-shaped structure having the heat generating portion according to claim 1 and the pan formed of the magnetic material mounted therein, the pan alone can prevent the generation of eddy current due to the lack of the area of the heat generating portion. Heating iron cooker for electromagnetic cookers that can be supplemented and used for practical heating. In the heating element for generating eddy current according to claim 1, aluminum which is a nonmagnetic material and an alloy of a ferromagnetic material and a nonmagnetic material, such as nickel and aluminum alloy, are integrally attached to the ring by a thermal spraying method. Heat generation for electromagnetic cookers. Electromagnetic cooking in which the surface of the heating element according to claim 3 is coated with a ceramic and glassy protective film produced by a sol-gel method for the purpose of sealing treatment and to prevent contamination and water repellency. Dexterous fever.

Images