RU2670017C2 - Blade member, container having blade member and heat-cooking apparatus - Google Patents

Abstract

FIELD: kitchen appliance.

SUBSTANCE: invention relates to household kitchen electrical appliances. Blade member is detachably arranged in a container and is rotated to impart an external force on an object to be cooked in the container. Blade member includes a permanent magnet that receives a rotating magnetic field generated from the underside of the blade member to rotate the blade member, a magnetic field control element that so controls the magnetic field strength of the permanent magnet generated from the underside of the blade member, such that the magnetic field is stronger during a high temperature period than during the normal temperature period, a housing portion in which the permanent magnet and the magnetic field control element are disposed, and a blade portion which is attached to the housing portion, wherein the blade portion provides application of an external force to the object to be cooked and placed in the container due to the rotation of the blade member.

EFFECT: technical result is an increase in the torque of the blade member and the possibility of controlling this torque.

10 cl, 13 dwg

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a blade member that is detachably housed in a container and which receives a rotating magnetic field for rotation, thereby providing an external force to the object to be heated and cooked in the container and to the blade container. and to a device for heat cooking, which includes a blade element. The present invention relates mainly to a blade element, a container with a blade element and a device for heat cooking, which involve the use of an induction device for heat cooking, used in ordinary household conditions.

BACKGROUND OF THE INVENTION

[0002] Traditionally, a rotary cooking apparatus has been proposed that provides heating of a tank located in its upper part by using a magnetic field generated by a helix included in an induction cooking apparatus and that rotates a rotating blade including permanent magnet or magnetizable element (see, for example, patent document 1).

[0003] The rotary cooker according to Patent Document 1 is directed to the implementation of a rotary cooker for cooking, in which the object being cooked therein does not stick to it without regularly stirring the object by using a rice scoop or the like, a rotating blade which can also be used for a container, such as another tank, and for which only a small storage space is required. FIG. 13 shows a conventional rotary cooking device described in Patent Document 1. As shown in FIG. 13, in a traditional rotary cooking device, a spiral 4 divided into many parts is connected to an inverter 3 and the spiral 4 creates a high-frequency magnetic field, a low-frequency magnetic field, or a magnetic field “mixed” from the data of the magnetic fields corresponding to the output of the inverter 3. A rotating blade 7, in which there is a permanent magnet 6, is placed on the inside the lower part of the reservoir 5 formed using non-magnetic metal, and the reservoir 5 is placed on the upper part of the spiral 4. Thus, both heating of the reservoir 5 and the rotation of the rotating blade 7 are performed.

PATENT DOCUMENT

[0004] Patent Document 1: JP 8-35664 A.

SUMMARY OF THE INVENTION

PROBLEM TO BE SOLVED BY THE INVENTION

[0005] However, with the above configuration for transmitting power by using a rotating magnetic field, the degree of magnetic interaction decreases as the gap in the magnetic circuit increases (length of the air gap). On the other hand, the thickness of the plate for placement, designed to accommodate the tank on it, and the thickness of the tank "are" between the spiral included in the induction device for heat cooking, and a permanent magnet included in the rotating blade, and therefore there is a large gap magnetic circuit. This magnetic circuit clearance is in fact from about 5 mm to about 15 mm. In order to guarantee a large torque for mixing the object being cooked in the tank (for example, several full plates of curry cooked by stewing), it is necessary to sufficiently couple the magnetic flux generated by the spiral of the induction device for thermal cooking, and the magnetic flux generated by the rotating with a blade, with each other. The rotating blade is required to have a blade shape suitable for mixing an object to be cooked, and a spatial limitation is imposed when the rotating blade includes a magnetic element.

[0006] Based on the need to increase the magnetic flux density in a confined space, you can use a strong permanent magnet that is made of a rare earth element, such as neodymium, samarium, or cobalt as a magnetic element attached to a rotating blade. On the other hand, when the rotating blade is removed from the tank and manipulated, the magnetic gap of the permanent magnet is the gap of the magnetic circuit in the case where the thickness of the tank and the thickness of the plate for placement are “missing”. In contrast, in this state, when the magnetic metal is moved closer to the rotating blade, the magnetic metal is attracted to the rotating blade due to the high magnetic field, and sufficient precautions are required to manipulate the rotating blade by itself. If we consider a situation such as a situation in which a rotating blade is washed, it is necessary to handle the rotating blade with care to avoid displacement of the rotating blade close to any knife, any fork and any kitchen sink, which are made of magnetic metal. A precision device such as a watch, a magnetic card, and the like may also be affected. Therefore, a problem arises in the practical use of the rotary cooking device for cooking, to be used in ordinary home conditions.

[0007] The present invention solves a traditional problem, and its task is to develop a blade element that is excellent in terms of ease of use by providing a large torque during rotation by incorporating a permanent magnet having a large magnetic force therein, and by regulating the impact of the magnetic force of the permanent magnet without any rotation, and a container with a blade element and a device for heat cooking, which includes ebya blade element.

MEANS FOR SOLVING THE PROBLEM

[0008] In solving the above problem, one aspect of the present invention is directed to the blade element, which is detachably located in the container, the blade element being rotated to exert external force on the object to be cooked in the container, the blade element including yourself:

a permanent magnet that senses a rotating magnetic field generated from the lower side of the blade element, for rotation of the blade element;

a magnetic field adjusting element that controls the magnetic field strength of the permanent magnet generated from the underside of the blade member so that the magnetic field is stronger during the high temperature period than during the normal temperature period;

a placement part in which a permanent magnet and a magnetic field control element are placed; and

the blade part, which is attached to the part for placement, while the blade part provides the application of external force to the object to be cooked and placed in the container due to the rotation of the blade element.

[0009] One aspect of the present invention is directed to a container with a blade member including a container configured to house an object to be cooked, the container receiving energy from outside to generate heat;

the blade element, which is detachably located in the container, wherein the blade element rotates to thereby exert external force on the object to be cooked in the container, the blade element including:

a permanent magnet that senses a rotating magnetic field generated from the lower side of the blade element, for rotation of the blade element;

a magnetic field adjusting element that controls the magnetic field strength of the permanent magnet generated from the underside of the blade member so that the magnetic field is stronger during the high temperature period than during the normal temperature period;

a placement part in which a permanent magnet and a magnetic field control element are placed; and

the blade part, which is attached to the part for placement, while the blade part provides the application of external force to the object to be cooked and placed in the container due to the rotation of the blade element.

[0010] One aspect of the present invention is directed to an apparatus for heat cooking, including:

a container with a blade element, including a container configured to house an object to be cooked, the container receives energy from outside to generate heat, and a blade element that is disposed in the container with the ability to disconnect, while the blade element rotates to thereby applying external force to the object to be cooked in the container;

a component for placement, configured to place a container on it;

a heating component, which is located on the lower side of the component for placement, while the heating component supplies energy to the container for heating the container; and

a component for creating a rotating magnetic field, which is located on the lower side of the component for placement, while the component for creating a rotating magnetic field provides a rotating magnetic field to the permanent magnet of the blade element;

blade element, including:

a permanent magnet that senses a rotating magnetic field generated from the lower side of the blade element, for rotation of the blade element;

a magnetic field adjusting element that controls the magnetic field strength of the permanent magnet generated from the underside of the blade member so that the magnetic field is stronger during the high temperature period than during the normal temperature period;

a placement part in which a permanent magnet and a magnetic field control element are placed; and

the blade part, which is attached to the part for placement, while the blade part provides the application of external force to the object to be cooked and placed in the container due to the rotation of the blade element.

EFFECT OF THE INVENTION

[0011] In accordance with the present invention, a blade member can be developed that is excellent in terms of ease of use by providing a large torque during rotation by incorporating a permanent magnet having a large magnetic force therein and by controlling the effect of magnetic the strength of the permanent magnet without any rotation, and a container with a blade element and a device for heat cooking, which includes a blade element.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012]

FIG. 1 is a schematic plan view of a container having a stirring function when viewed from above, wherein the container has a stirring member housed therein in the first embodiment of the present invention.

Figure 2 is a partially cutaway schematic illustration of a stirring element in a first embodiment of the present invention.

Figure 3 is a partially cutaway schematic illustration of a cooking apparatus (at normal temperature and without any stirring) in a first embodiment of the present invention.

Figure 4 is a partially cutaway schematic illustration of a cooking apparatus (during heating and with stirring) in a first embodiment of the present invention.

5 is a plan view of a component for generating a rotating magnetic field and a heating component in a first embodiment of the present invention.

6 is a graph of a change in characteristic for explaining a magnetic characteristic with a change in temperature of a temperature-sensitive magnetic material that is to become an element for adjusting a magnetic field in the first embodiment of the present invention.

FIG. 7 is a partially cutaway schematic view of a state in which a heating container provided in a cooking apparatus in a first embodiment of the present invention is moved to a position offset on a flat surface from the center of the component to create a rotating magnetic field .

Fig. 8 is a partially cutaway schematic illustration of a cooking cooking apparatus in a second embodiment of the present invention.

FIG. 9 is a graph of a characteristic change for explaining a magnetic characteristic with a temperature change of a temperature-sensitive magnetic material that is to become an element for adjusting a magnetic field in a second embodiment of the present invention.

10 is a partially cutaway schematic illustration of a stirring member in a third embodiment of the present invention.

11 is a partially cutaway schematic illustration of a cooking apparatus (at normal temperature and without any stirring) in a third embodiment of the present invention.

12 is a partially cutaway schematic illustration of a cooking apparatus (during heating and with stirring) in a third embodiment of the present invention.

13 is a partially cutaway schematic illustration of a conventional rotary cooking device.

EMBODIMENT (S) FOR CARRYING OUT THE INVENTION

[0013] A first aspect of the invention is directed to a blade member that is detachably disposed in a container, the blade member being rotated to thereby exert external force on an object to be cooked in the container, the blade member comprising:

a permanent magnet that senses a rotating magnetic field generated from the lower side of the blade element, for rotation of the blade element;

a magnetic field adjusting element that controls the magnetic field strength of the permanent magnet generated from the underside of the blade member so that the magnetic field is stronger during the high temperature period than during the normal temperature period;

a placement part in which a permanent magnet and a magnetic field control element are placed; and

the blade part, which is attached to the part for placement, while the blade part provides the application of external force to the object to be cooked and placed in the container due to the rotation of the blade element.

Thus, the regulation of the magnetic field generated from the lower side of the blade element can be carried out in such a way that the magnetic field changes between the period of high temperature due to heating and the period of normal temperature without any heating. Therefore, a rotating magnetic field has a strong effect on the blade member during heating, and an external force can be applied by rotation with high torque, and any effect of a magnetic field that acts on the periphery of the blade member during a period of normal temperature can be suppressed. A blade element can be obtained that is excellent in terms of ease of use by incorporating a permanent magnet therein having a large magnetic force to provide high torque when the blade element rotates, and by suppressing any effect of the magnetic force of the permanent magnet when the blade the element does not rotate.

[0014] A second aspect of the invention is directed to a blade member in accordance with a first aspect, wherein the magnetic field adjusting element includes a temperature-sensitive magnetic material whose magnetism is weaker at a high temperature region than at a normal temperature region.

Both the application of an external force through rotation with high torque due to the strong influence of a rotating magnetic field on the blade element during heating, and the suppression of any effect of a magnetic field on the periphery of the blade element in the period of normal temperature can be realized by using magnetism with a change in temperature sensitive to a change in temperature, magnetic material.

[0015] A third aspect of the invention is directed to a blade member in accordance with a second aspect, wherein

the placement part comprises an internal space in which the permanent magnet is arranged to move in it in the up and down directions;

magnetic field regulation element, fixed in the upper part of the inner space; and

the permanent magnet is attracted by the magnetic force of the magnetic field adjusting element to place the permanent magnet in the upper part of the inner space during the normal temperature period and is located in the lower part of the inner space during the high temperature period.

Both the application of an external force through rotation with a large torque during heating, and the suppression of any effect of a magnetic field on the periphery of the blade element in the period of normal temperature can be realized by adjusting the position of the permanent magnet in height in the inner space by using the characteristic magnetism with a change in temperature sensitive to a change in temperature, magnetic material.

[0016] A fourth aspect of the invention is directed to a blade member in accordance with a first aspect, wherein the magnetic field adjusting element includes a temperature sensitive magnetic material whose magnetic permeability is lower at a high temperature region than at a normal temperature region, and a magnetic field adjusting element is positioned so that it covers the lower surface of the permanent magnet.

Both the application of an external force through rotation with a large torque during heating, and the suppression of any effect of a magnetic field on the periphery of the blade element in the period of normal temperature can be realized by controlling the degree of adhesion of the magnetic flux generated by the permanent magnet and magnetic flow generated by a rotating magnetic field, by using the characteristics of magnetism when the temperature is sensitive to temperature, the magnet nogo material.

[0017] A fifth aspect of the invention is directed to a blade member in accordance with a fourth aspect, wherein the magnetic field adjusting member is positioned such that it observes the entire permanent magnet.

Thereby, any effect of a magnetic field that acts in all directions on the periphery of the blade element in the period of normal temperature can be suppressed, and, for example, the blade element can be configured with a low height (thickness).

[0018] A sixth aspect of the invention is directed to a blade member in accordance with a fifth aspect, wherein

the placement part comprises an internal space in which the permanent magnet is placed to move therein;

the element of regulation of the magnetic field includes an alloy with a shape memory, the shape of which changes when its temperature changes, and provides support for a permanent magnet in the inner space, and

the shape of the magnetic field adjusting element changes so that the height position in which the magnetic field adjusting element provides support for the permanent magnet is lower at a high temperature region than at a normal temperature region in the interior.

Both the application of an external force by rotation with a large torque during heating, and the suppression of any effect of a magnetic field on the periphery of the blade element in the period of normal temperature can be realized by adjusting the position of the permanent magnet in height in the inner space by using the change alloy shape with shape memory when temperature changes.

[0019] A seventh aspect of the invention is directed to a blade member container, comprising:

a container configured to house an object to be cooked, the container receiving energy from outside to generate heat; and

a blade member in accordance with any of the first to sixth aspects.

Thus, the regulation of the magnetic field generated from the lower side of the blade element can be carried out in such a way that the magnetic field will vary between the period of high temperature due to heating and the period of normal temperature without any heating. Therefore, a rotating magnetic field has a strong effect on the blade member during heating, and an external force can be applied by rotation with high torque, and any effect of a magnetic field that acts on the periphery of the blade member can be suppressed at normal temperature. A container with a blade element can be obtained that includes a blade element that is excellent in terms of ease of use by incorporating a permanent magnet having a high magnetic force to provide high torque when the blade element rotates, and by suppressing any effect magnetic force of a permanent magnet when the blade element does not rotate.

[0020] An eighth aspect of the invention is directed to a blade container in accordance with a seventh aspect, wherein

the container contains a magnetic metallic material that perceives a magnetic field of induction for heat generation, on the outer circumference of its lower surface;

the blade element is located on the inner lower surface of the container with the possibility of disconnection; and,

when the blade element is located on the inner lower surface of the container, the portion for accommodating the blade element is located on the circumference side, which is more internal than the magnetic metal material of the container.

Since the container thus includes magnetic metal material on the outer circumferential periphery of the lower surface of the container, the container can be effectively heated by induction heating, and since the portion for accommodating the blade member is located on the circumference side that is more internal than the magnetic metal material of the container, during the rotation of the blade element during heating, a strong effect of a rotating magnetic field acting from an external Container hand, on the blade element.

[0021] A ninth aspect of the invention is directed to a cooking cooking apparatus, comprising:

a blade container in accordance with a seventh aspect;

a component for placement, configured to place a container on it;

a heating component, which is located on the lower side of the component for placement, while the heating component supplies energy to the container for heating the container; and

a component for creating a rotating magnetic field, which is located on the lower side of the component for placement, while the component for creating a rotating magnetic field provides a rotating magnetic field to the permanent magnet of the blade element.

Thus, the regulation of the magnetic field generated from the lower side of the blade element can be carried out in such a way that the magnetic field will vary between the period of high temperature due to heating and the period of normal temperature without any heating. Therefore, a rotating magnetic field has a strong effect on the blade member during heating, and an external force can be applied by rotation with a large torque, and any effect of a magnetic field that acts on the periphery of the blade member can be suppressed in a period of normal temperature. A blade element can be obtained that is excellent in terms of ease of use by incorporating a permanent magnet therein having a large magnetic force to provide high torque when the blade element rotates, and by suppressing any effect of the magnetic force of the permanent magnet when the blade the element does not rotate, and a device for heat cooking can be obtained, including a container with a blade element, which provides thermal cooking boot object to be heated.

[0022] A tenth aspect of the invention is directed to a heat cooking apparatus in accordance with a ninth aspect, wherein

the container contains magnetic metallic material on the outer circumferential periphery of its lower surface;

the blade element is located on the inner lower surface of the container with the possibility of disconnection;

when the blade element is located on the inner lower surface of the container, the portion for accommodating the blade element is located on the side of the circle, more internal compared to the magnetic metal material of the container;

the heating component comprises a heating coil, which provides induction heating of the magnetic metallic material of the container by creating an induction magnetic field; and

a heating coil is located on the peripheral periphery of the component to create a rotating magnetic field in the component for placement.

Since the container thus includes magnetic metal material on the outer circumferential periphery of the lower surface of the container, the container can be effectively heated by induction heating, and since the portion for accommodating the blade member is located on the circumference side that is more internal than the magnetic metal material of the container, during the rotation of the blade element during heating, a strong effect of a rotating magnetic field acting from an external Container hand, on the blade element.

[0023] The value of applying an external force, such as high torque stirring, to an object to be cooked during a high temperature period during a heat cook will be described. In conventional cooking, for example, such as stewing, the water in the object to be cooked evaporates when heated, and thus increases its viscous resistance. With further continued heating, there is a tendency for partial burning due to evaporation of water. Burning can be prevented by performing stirring with a large torque or the like for an object to be cooked in a high temperature period. Without using a device that performs stirring or the like, as described above, the cook needs to perform the operation of manually stirring the object to be cooked by using a rice scapula or the like to avoid burning. The cook can be freed from such work, and labor costs during cooking can be eliminated by using the cooking device of the present invention.

[0024] Embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

[0025] (First embodiment)

FIG. 1 is a schematic plan view of a container having a stirring function (one example of a container with a blade member) as viewed from above, wherein the container has a mixing element (one example of a blade member) housed therein in the first embodiment of the present inventions. As shown in FIG. 1, the stirring member 10 includes an accommodating portion 14 in which a permanent magnet 12 and a magnetic field adjusting member 13 are placed, and a blade portion 11 located on the circumferential periphery of the accommodating portion 14. The mixing element 10 is detachably located on the inner lower surface of the container 20, which houses the object to be cooked (not shown), and is configured to allow external force to be applied to the object to be cooked in the container 20, by rotating the mixing element 10 for mixing the object to be cooked by using the blade part 11.

[0026] FIG. 2 is a partially cutaway schematic diagram of a main configuration of a stirring member 10 in a first embodiment of the present invention. For example, FIG. 2 is a cutaway diagrammatic view of the internal configuration of part 14 for placement in the stirring member 10. In FIG. 2, reference numeral 12 denotes a permanent magnet, reference numeral 13 denotes a magnetic field adjustment element, and both are placed in the portion 14 to accommodate. In FIG. 2, the up and down directions of the page and the up and down directions with respect to the relative position of the mixing element 10 located in the container 20 coincide with each other. In the accommodating portion 14, a surface facing the inner lower surface 20A (see FIG. 3) of the container 20, that is, the lower side on the page, is the lower surface. Many of the protruding parts 14b are located on the lower surface of the part 14 for placement. With these protruding parts 14b, the contact area between the inner bottom surface 20A of the container 20 and the lower surface of the housing part 14 can be reduced when the container 20 has a stirring member 10 located therein and the rotation resistance of the stirring member 10 can be reduced.

[0027] The permanent magnet 12 is located opposite the inner bottom surface 20A (see FIG. 3) of the container 20 when the stirring element 10 is located in the container 20, and perceives a rotating magnetic field generated from the lower side of the stirring element 10 to allow rotation of the stirring element 10. The element 13 of the regulation of the magnetic field, regulates the intensity of the magnetic field generated outside the mixing element 10 by a permanent magnet 12, in accordance with the state of temperature due to external heating, when the stirring member 10 is located in the container 20. The magnetic field adjusting member 13 is integrally arranged with the placement part 14 so that the surface that is attracted to the permanent magnet 12 is located at a distance L3 from the outer surface located on the upper side of the part 14 for placement.

[0028] In the accommodating portion 14, the magnet moving space 14a is formed as an inner space for accommodating the permanent magnet 12 therein to move up and down, and the magnetic field adjusting member 13 is located in the upper part of the magnet moving space 14a. The magnetic field adjusting element 13 is formed by using a temperature-sensitive magnetic material having a magnetism characteristic that changes when the temperature changes in accordance with a temperature state due to external heating, as described later (see FIG. 6). For example, the magnetic field adjusting element 13 has strong magnetism at a normal temperature region without any heating, and the permanent magnet 12 is attracted by the magnetic field adjusting element 13 due to the magnetic force to move the permanent magnet 12 to the upper part of the magnet moving space 14a to accommodate the permanent magnet 12 in this upper part. As a result, as shown in FIG. 2, the permanent magnet 12 will be located essentially in the center of the accommodation portion 14, determined in the up and down directions, will be located at a distance L1 from the outer surface located on the side of the lower surface of the accommodation portion 14, and will be held in that place. On the contrary, at a region of high temperatures to which the magnetic field regulation element 13 is heated from the outside, the magnetic field regulation element 13 has a magnetism weaker than at a normal temperature region. Therefore, the permanent magnet 12 moves away from the magnetic field adjusting element 13, and moves to the lower part of the space 14a to move the magnet. As a result, the permanent magnet 12 moves to the side adjacent to the inner lower surface 20A of the container 20 to accommodate the permanent magnet 12 there and is placed at a distance L2 from the outer surface located on the side of the lower surface of the part 14 for placement.

[0029] FIG. 3 is a partially cutaway schematic diagram of a main configuration of a cooking apparatus in a first embodiment of the present invention. As shown in FIG. 3, the cooking apparatus 100 includes a container 20 with a stirring element 10, a placement component 40 on which a container 20 can be placed, a heating component 50 located in the lower part (from the lower side) of the component 40 for placement, a heating control circuit 55 that provides for driving the heating component 50, and a component 60 for generating a rotating magnetic field and located in the lower part (on the lower side of the component 40 for placement. The evolving component 50 has the function of heating the container 20 by supplying energy to the container 20, and the component 60 for generating a rotating magnetic field has the function of supplying a rotating magnetic field to the permanent magnet 12 of the stirring element 10. The cooking apparatus 100 has, like a device for cooking with induction heating (IH), the function of extinguishing or cooking an object to be cooked and placed in the container 20, by heating the container 20 by using induction Nogo heating.

[0030] The container 20 is placed on the component 40 to be placed above the heating component 50 and the component 60 to create a rotating magnetic field, and opposite these components 50 and 60, and the stirring element 10 is located in the container 20. The heating component 50 is driven by circuit 55 control the heating, and thus the container 20 is heated. For example, in the first embodiment, the heating component 50 is a coil for induction heating, and the heating control circuit 55 is an inverter that is connected to a commercial electric power source and which generates a high frequency voltage. The magnetic metal material 21 is located integrally with the container 20 on the outer circumferential periphery of the lower surface of the container 20. When magnetic field lines are received from the heating component 50, eddy current is generated in the magnetic metal material 21 on the lower surface of the container 20, and the Joule heat generated eddy current due to thermal conductivity is transferred to the entire container 20. Thus, the object to be cooked in the container is heated. The container 20 includes a substantially non-magnetic metal and in the first embodiment includes an aluminum alloy, which is a material having excellent thermal conductivity.

[0031] As shown in FIG. 3, the magnetic metal material 21 is located opposite the heating component 50 and has a substantially annular shape. The component 60 for creating a rotating magnetic field is located on the lower side of the component 40 for receiving the device 100 for cooking and opposite the inner zone of the annular shape of the magnetic metal material 21. When the mixing element 10 is located on the inner lower surface of the container 20, part 14 for accommodating the mixing element 10 (i.e., the permanent magnet 12) is located (located) on the side of the circle, more internal than the magnetic metal material 21 of the container EPA 20. A rotating magnetic field generated by component 60 to create a rotating magnetic field passes through the lower surface of the container 20, which includes a non-magnetic metal.

[0032] FIG. 3 is a schematic representation of a state at normal temperature without any stirring before heating, and the permanent magnet 12 is attracted to the magnetic field control element 13, and is in place on the side that is remote from the component 60 to create a rotating magnetic field.

[0033] FIG. 4 is a partially cutaway schematic view of a cooking apparatus 100 showing a state during stirring heating in the first embodiment of the present invention. In the state shown in FIG. 4, the container 20 is heated by magnetic field lines from the heating component 50 by the magnetic metal material 21, and the magnetic field adjustment element 13 is also heated. The magnetic field adjusting element 13 has weak magnetism at a high temperature region, and therefore, the permanent magnet 12 moves away from the magnetic field adjusting element 13, and moves in space 14a to move the magnet to the side adjacent to the inner lower surface 20A (i.e., to the lower side) to place a permanent magnet 12 next to the component 60 to create a rotating magnetic field. In this state, the rotating magnetic field generating component 60 creates a rotating magnetic field to adhere the magnetic flux generated by the permanent magnet 12 located on the mixing element 10, which is located in the container 20, to the magnetic flux which is created by the rotating magnetic field. Thus, the stirring element 10 can be driven in rotation near the bottom surface of the container 20, and a strong torque can be generated in the stirring element 10. As a result, the object to be cooked (not shown) and placed in the container 20 can be mixed with the blade part 11 located on the mixing element 10.

[0034] FIG. 5 is a schematic plan view of a component 60 for generating a rotating magnetic field, and a heating component 50 of the cooking apparatus 100 in the first embodiment of the present invention. As shown in FIG. 5, in the cooking apparatus 100, the heating component 50 is arranged in a substantially flat shape so that it faces the magnetic metal material 21 and overlaps the magnetic metal material 21 in the up and down directions (see FIG. 3 ) located with a substantially annular shape on the outer circumferential periphery of the lower surface of the container 20. The heating control circuit 55 is connected to the heating component 50. The rotating magnetic field generating component 60 and arranged to separate it about many parts on a given circle, each of which is formed by winding a spiral 61 on a magnetic core 62, is located in space on the side of the inner circumferential periphery of the heating component 50. Each spiral 61 is connected to a rotation control circuit 65, and the rotation control circuit 65 controls a sequential by supplying power to a plurality of coils 61, and thus a rotating magnetic field can be created.

[0035] FIG. 6 is a graph of a change in characteristic for explaining a magnetic characteristic with a change in temperature of a temperature-sensitive magnetic material used in the magnetic field control element 13 in the first embodiment of the present invention. The magnetic field adjusting element 13 includes a temperature sensitive magnetic material having properties such that its magnetic characteristic varies with the temperature region and has a magnetic characteristic that changes with temperature and shown in FIG. 6. Based on this characteristic, it can be pointed out that the magnetic field regulation element 13 has strong magnetism at a normal temperature region, and therefore, the permanent magnet 12 moves upward, counteracting gravity, to be held by the magnetic field regulation element 13 with the restriction of its position ( that is, the permanent magnet 12 is attracted to be placed at the top of the space 14a to move the magnet). During the heat cooking, the temperature of the magnetic field adjusting element 13 rises in accordance with the temperature increase of the container 20, and the magnetism of the magnetic field adjusting element 13 decreases. Therefore, the attractive force between the permanent magnet 12 and the magnetic field regulation element 13 decreases, and at high temperatures, the permanent magnet 12 moves away from the magnetic field regulation element 13, under the influence of the weight of the self-permanent magnet 12 or magnetic field created by the rotating magnetic field generating component 60 , and moves to the lower side of the mixing element 10 to approach the rotating magnetic field generating component 60 (i.e., to place the permanent magnet 12 in the lower second part of the space 14a to move the magnet). Thus, the regulation of the magnetic field generated in the mixing element 10, in particular the magnetic field created on its lower side, is carried out by controlling the permanent magnet 12 on the basis of the magnetic characteristics of the temperature-sensitive magnetic material forming the element that changes with temperature, 13regulation of the magnetic field. The magnetic field generated by the mixing element 10 during mixing, and its magnetic field in the absence of any mixing may differ from each other.

[0036] The operation and principle of operation will be described below for the cooking apparatus 100 of the first embodiment having the above configuration.

[0037] The position of the permanent magnet 12 in the stirring member 10 at a normal temperature region before heating is limited by the position essentially in the center of the accommodating portion 14 defined in the up and down directions (the permanent magnet 12 is located in the upper part of the magnet moving space 14a) due to the impact of the element 13regulation of the magnetic field. In this state, the distance between the outer peripheral surface of the accommodating portion 14 and the permanent magnet 12 is elongated, and therefore, the effect of the magnetic field created by the permanent magnet 12 on the space external to the mixing element 10 can be reduced. As shown in FIG. 2, the distances L1, L3 and L4 (distances at a normal temperature region) between the outer peripheral surface of the accommodating portion 14 and the permanent magnet 12 are set to be long compared to the distance L2 during heating and stirring. When no heating is performed (in the period of normal temperature), the distance can be guaranteed to attenuate the influence of the magnetic force acting from the side of the permanent magnet 12 on the periphery of the stirring element 10. In this state, the permanent magnet 12 is also located away from the rotating magnetic generating component 60 fields.

[0038] On the other hand, during the cooking process, the heating component 50 is supplied with power via the heating control circuit 55, and the temperature of the magnetic field adjusting element 13 rises due to thermal conductivity in accordance with the increase in the temperature of the container 20 and the convective heat from the object to be heated. In this case, the magnetism of the magnetic field regulation element 13 gradually decreases, and when the temperature reaches a predetermined temperature (for example, 70 ° C), the permanent magnet 12 moves away from the magnetic field regulation element 13 for instantaneous movement so that the distance to the outer surface located on the side the lower surface of the part 14 for placement, became equal to L2. In this state, the permanent magnet 12 is located at the bottom in the space 14a for moving the magnet, and the permanent magnet 12 is located next to the rotating magnetic field generating component 60. In this state, the mixing element 10 can be rotated with high torque by providing a rotating magnetic field by the rotating magnetic field creating component 60, and by providing a strong magnetic field to the mixing element 10.

[0039] When the stirring element 10 is removed from the container 20 or when the heating is interrupted and the temperature of the object to be heated decreases, the temperature of the magnetic field adjusting element 13 decreases accordingly, and when the temperature reaches a predetermined temperature (eg, 40 ° C) , the magnetism of the magnetic field adjusting element 13 becomes strong. Thus, the permanent magnet 12 instantly moves upward in the space 14a to move the magnet and is attracted to the magnetic field regulation element 13 to restore its state before heating.

[0040] Detection means may be provided that determines whether the permanent magnet 12 is adjacent to the rotating magnetic field generating component 60, and when the detection means detects that the permanent magnet 12 is adjacent to it, a rotating magnetic field may be generated by the component 60 creating a rotating magnetic field. A temperature sensor for detecting the temperature of the magnetic field adjusting element 13, or a temperature sensor for detecting the temperature of the container 20, can be used as a detection means. In addition, a sensor can be used to detect changes in the magnetic field generated from the outside of the stirring element 10 by the permanent magnet 12.

[0041] Advantages will be described in that high torque mixing can be achieved by incorporating a permanent magnet 12 having a high magnetic force into the mixing element 10, and furthermore that the mixing element is convenient to use. 10 may be upgraded.

[0042] FIG. 7 is a partially cutaway diagrammatic view of the usage status of the cooking apparatus 100 in the first embodiment of the present invention, and is a partial sectional diagrammatic view of the case when the container 20 is placed on the container for placement component 40 of the device 100 for heat cooking with the displacement of its position on this component. The state of FIG. 7 differs from the state of FIG. 4 in that the center positions of the heating component 50 and the rotating magnetic field generating component 60, and the center position of the container 20 are displaced horizontally from each other in the state of FIG. 7. In this state, there is no mechanical adjustment of the position of the mixing element 10 by any supporting axis or the like with respect to the position of the container 20. Therefore, the mixing element 10 is attracted by the rotating magnetic field created by the rotating magnetic field creating component 60 due to its heating. As a result, the stirring member 10 moves from the position shown by the dashed line to the position shown by the solid line in FIG. 7, allowing the predetermined displacement of the position of the container 20 on the component 40 to be placed. Therefore, the mixing operation can be performed in the state shown by the solid line in FIG. 7, in which the centers of the mixing element 10 and the rotating magnetic field generating component 60 correspond to each other on a flat surface.

[0043] There is no need to specifically provide any mechanical adjustment of the position of the container 20 on the placement component 40, since adjustment is made to offset the position of the mixing element 10 by means of a permanent magnet 12 having a strong magnetic field and a rotating magnetic field generated by the creation component 60 rotating magnetic field. In addition to the container 20 having the shape shown in FIG. 7 and the like, another container having a different outer diameter and a different shape of the bottom surface can be placed on the component 40 of the cooking device 100 for cooking, for cooking culinary processing. The container 20 is pressed by the mixing element 10 towards the component 40 to be placed under the action of the attractive force between the permanent magnet 12 of the mixing element 10 and the rotating magnetic field created by the rotating magnetic field generating component 60. Thus, the action of magnetic force can be provided to suppress any “swimming” and any sliding of the container 20 along the component 40 of the cooking device 100 intended for placement, and even when mixing an object that creates a large load and needs to be cooked, with a large torque, any displacement of the position of the container 20 and any rotation of the container 20 can be prevented during heating and mixing, resulting in excellent stability. The coating treatment can be applied to the inner surface of the container 20 using fluoride resin or ceramic material. As for the lower part of the mixing element 10, the protruding parts 14b are also located on the lower part of the mixing element 10 to reduce the sliding resistance on the lower surface of the container 20.

[0044] Using the cooking apparatus 100 of the first embodiment configured with the above configuration allows the user to avoid any labor involved in mixing the subject to be cooked by using a tool such as a rice paddle without any concerns regarding the burning of the object to be cooked, even during cooking. As for the container 20, in contrast to manual mixing, heating and mixing can be performed in a state in which the container 20 is closed by a lid (not shown). Therefore, efficient cooking can be carried out to prevent any loss of heat from the inlet of the container 20, and any mixing of the cooked item in the environment can be prevented during mixing. There is no need to include any support shaft, any bearing, or the like in the container 20, and even when the container 20 is washed, or even when the container 20 is stored in a stack above and below other containers when the container 20 is not in use, the container 20 can be handled similarly to the handling of a conventional pan.

[0045] Each of the partially cutaway schematic views of the cooking apparatus 100 shown in FIG. 3, FIG. 4 and FIG. 7 shows a sectional view of a central portion of a container 20 having a substantially cylindrical shape. In a first embodiment, the rotating magnetic field generating component 60 is configured by arranging a magnetic core 62 having a coil 61 wound thereon divided into a plurality of parts along a circle such that the rotation control circuit 65 controls the sequential power supply for the plurality of coils 61 to create rotating magnetic field. A plurality of permanent magnets 12 included in the stirring element 10 are arranged along a circle at intervals corresponding to, for example, equal angles, in accordance with a rotating magnetic field generated by the rotating magnetic field generating component 60. As for the permanent magnet (s) 12, only one permanent magnet can be placed only when the given one permanent magnet has a plurality of magnetic poles, and its placement is not limited to the case where a plurality of permanent magnets are placed. Since the heating component 50 can provide direct induction heating of the non-magnetic metal, the magnetic metal material 21 in the container 20 can be eliminated, or the container 20 can be formed by using a non-magnetic aluminum alloy similar to the container to be heated by a conventional heating device, or the like. The rotating magnetic field generating component 60 is not limited to the component having the configuration shown in FIG. 1, and may be a component that creates a rotating magnetic field by attaching permanent magnets or magnetized bodies to the rotating shaft of the electric motor and rotating the rotating shaft.

[0046] When the stirring member 10 is removed from the container 20 and manipulated, the permanent magnet 12 is attracted to the magnetic field adjusting member 13 and placed substantially in the center of the accommodating portion 14 defined in the up and down directions. Therefore, the magnetic field generated by the mixing element 10 can be attenuated, and any effect of the magnetic field on the environment surrounding the mixing element 10 can be suppressed. Considering the situation where the stirring element 10 is washed or stored for storage, and the like, excellent usability of the stirring element 10 can be ensured even when any magnetic metal such as a knife is adjacent to the stirring element 10 , fork or countertop / top panel in the kitchen.

[0047] (Second Embodiment)

Fig. 8 is a partially cutaway schematic illustration of a cooking cooking apparatus in a second embodiment of the present invention. In the cooking apparatus according to the first embodiment, a configuration is used in which the permanent magnet 12 of the stirring element 10 is moved up and down, so that the distance between the permanent magnet 12 and the rotating magnetic field generating component 60 is changed, and thereby the magnetic field generated by the mixing element 10 is regulated. On the contrary, in the device for thermal cooking according to the second embodiment, A configuration is used in which, when the permanent magnet 12 is located in the lower part of the stirring element 10, the magnetic field adjustment element 13 in which the material is sensitive to temperature changes is located so that it covers the side of the permanent magnet 12 facing to the inner bottom surface 20A of the container 20. In this way, the need to form a space for moving the permanent magnet 12 in the up and down directions in part 14 can be avoided, and the height of the accommodation part 14 can be set small.

[0048] The operation and principle of operation will be described below for the cooking cooking apparatus 100 of the second embodiment having the above configuration.

[0049] FIG. 9 is a graph of a characteristic change for explaining a magnetic characteristic with a temperature change of a temperature-sensitive magnetic material forming a magnetic field adjustment element 13 and housed in a stirring element 10, in a second embodiment of the present invention. As for the magnetic field adjusting element 13, the magnetic permeability of the temperature-sensitive magnetic material is high in the period of the normal temperature without any heating in accordance with the temperature-changing characteristic shown in Fig. 9 similarly to the first embodiment. Most of the magnetic flux generated by the permanent magnet 12 converges inside the magnetic field regulation element 13 to form a closed magnetic circuit and attenuates the magnetic field created by the mixing element 10. On the other hand, with regard to the magnetic field regulation element 13, its magnetic permeability is low when the temperature is high due to heating. Most of the magnetic field generated by the permanent magnet 12 passes through the magnetic field regulation element 13. In this state, a strong magnetic field is provided due to the creation of a rotating magnetic field by the rotating magnetic field generating component 60. Thus, the degree of adhesion of the magnetic flux generated by the permanent magnet 12 and the magnetic flux generated by the rotating magnetic field can be increased, and mixing of the object to be cooked with high torque can be carried out during cooking.

[0050] With regard to the permanent magnet 12 shown in Fig. 8, an example is shown in which the lower surface (the surface of the lower side) and the side surface of the permanent magnet 12 are covered by a temperature-sensitive magnetic material forming the magnetic field regulation element 13. Not limited to this case, it should be noted that temperature-sensitive magnetic material should be placed so that it covers only at least the lower surface of the permanent magnet 12. Temperature-sensitive magnetic material can be placed so that it will close the entire permanent magnet 12. With this configuration, at a normal temperature region, the influence of the magnetic field created by the permanent magnet 12, which acts on space, can be suppressed uzhnoe relative to stirring element 10 and, for example, the height of the stirring member 10 can be reduced.

[0051] (Third Embodiment)

10 is a partially cutaway schematic illustration of an inner zone for accommodating a portion 14 of a stirring member in a third embodiment of the present invention. In the third embodiment, a configuration is used that is similar to the configuration of the first embodiment in that the permanent magnet 12 moves up and down, and by using the change in distance caused by this movement between the permanent magnet 12 and the rotating magnetic field generating component 60, is provided the regulation of the magnetic field generated by the mixing element 10. The third embodiment differs from the first embodiment in that in a third Embodiment adopts a configuration whereby the shape memory alloy having the ability to change the nature of its shape in accordance with an increase in temperature which is caused by any external heating element 13 used in the magnetic field adjustment.

[0052] As shown in FIG. 10, a magnet moving space 14a in which the permanent magnet 12 is arranged to move up and down therein is formed in a portion 14 of the stirring member for receiving. In the magnet moving space 14a, a permanent magnet 12 is attached to the magnet holding device 15, and the magnet holding device 15 is supported by the magnetic field adjustment member 13. The magnetic field adjusting element 13 is formed by using a shape memory alloy, the shape of which changes with temperature, and is configured to change the height position in which it provides support for the magnet holding device 15 in an up and down direction the space 14a for moving the magnet due to a change in the shape of the magnetic field adjusting element 13. For example, the shape of the magnetic field adjusting element 13 changes so that the height position in which the magnetic field adjusting element 13 provides support for the magnet holding device 15 (that is, the height position in which the support for the permanent magnet 12 is provided) is changed to lower at high temperatures. In the space 14a for moving the magnet, a guide portion 14c is arranged for guiding the magnetic field control element 13, which includes an alloy with shape memory when its shape changes. In the example shown in FIG. 10, the magnetic field adjusting element 13 is formed with a shape similar to a coil spring. The shape of the magnetic field adjusting member 13 is not limited to a shape similar to a coil spring, and each of various other shapes can be used.

[0053] The operation and principle of operation will be described below for the cooking apparatus of the third embodiment having the above configuration.

[0054] FIG. 11 is a partially cutaway schematic view of a cooking apparatus when the temperature is a normal temperature before heating in a third embodiment of the present invention. The permanent magnet 12 is attached to the magnet holding device 15 and is located integrally with the magnet holding device 15 in the space 14a for moving the magnet with the possibility of moving in this space up and down. As shown in FIG. 11, when the temperature is a normal temperature without any heating, the magnetic field adjusting element 13 holds the magnet holding device 15 in the upper height position at which support is provided. Therefore, the permanent magnet 12 will be located essentially in the center of the portion 14 for placement, which is determined in the up and down directions, and the influence of the magnetic field created by the mixing element 10 on the space external to it is suppressed.

[0055] FIG. 12 is a partially cutaway schematic view of a heat cooking apparatus at a high temperature region during heat cooking in a third embodiment of the present invention. As shown in FIG. 12, in a state at a high temperature caused by heating, the shape of the magnetic field adjusting member 13 changes to a shape in which the support for the magnet holding device 15 is provided in a lower height position. Therefore, the permanent magnet 12 is adjacent to the rotating magnetic field generating component 60. In this state, mixing the cooked object with high torque by means of the stirring element 10 can be accomplished by providing a strong magnetic field to the adjacent permanent magnet 12 by creating a rotating magnetic field by the rotating magnetic field generating component 60. In the third embodiment, the shape memory alloy has a shape in which the “bi-directional” shape memory effect is used, such as expansion and contraction at normal temperature and when heated, the type being not limited to this type, and a shape memory alloy with the effect “can be used” unidirectional "shape memory, which is used in combination with a spring, which creates a biasing force either during expansion or compression.

[0056] A description has been made of the embodiments using, as an example, a case in which the blade element rotating in the container is a mixing element, while the blade element is not limited thereto. Any blade element can be used, provided that the blade element is detachable in the container, provides an external force to the object to be cooked in the container due to its rotation and performs mixing, cutting, grinding, kneading and the like, using application of external force.

[0057] A description has been made of embodiments using, as an example, a case in which a container is heated by using induction heating by means of a heating component located in the cooking apparatus, while the configuration of the heating component is not limited to this configuration. The heating component should have only the function of heating the container by supplying energy to the container and can use heating means such as a heating element, steam, warm air or radiation heating, in addition to induction heating.

[0058] Arbitrary embodiments of the above various embodiments can be combined, and thereby the effects to be achieved by the combined embodiments can be achieved.

[0059] The present invention has been described sufficiently for its preferred embodiments with reference to the accompanying drawings, and various changes and variations thereto are obvious to those skilled in the art. It should be understood that such alterations and changes are encompassed by the present invention without departing from the scope of the present invention defined by the appended claims.

INDUSTRIAL APPLICABILITY

[0060] As indicated above, the cooking apparatus of the present invention is configured with a magnetic field control element that controls the magnetic field generated by the blade element together with the permanent magnet and acting on the outer space, and is located on the blade element driven in action and into rotation by a rotating magnetic field. This configuration makes it possible to vary between the magnetic field at the time when the blade element rotates and the magnetic field at the time when the blade element does not rotate, makes it possible to achieve a large torque during rotation, and allows suppression of the magnetic force acting on the space, external with respect to the blade element, without any rotation of it. Therefore, the present invention can be applied to a cooking apparatus that heats an object to be cooked and that performs cooking such as stirring, cutting, grinding and kneading using a blade member.

EXPLANATION OF REFERENCE POSITIONS

[0061]

10 mixing element

11 blade element

12 permanent magnet

13 magnetic field adjusting element

14 part for placement

20 container

20A inner bottom surface

40 components to accommodate

50 heating component

60 components for creating a rotating magnetic field

Claims (34)

1. The blade element, which is installed in the container with the possibility of detachment, while the blade element is made to rotate to apply thereby external force to the object to be cooked in the container, while the blade element contains: a permanent magnet that senses a rotating magnetic field generated from the lower side of the blade element, for rotation of the blade element; a magnetic field control element that controls the magnetic field strength of the permanent magnet generated from the underside of the blade element so that the magnetic field is stronger during a high temperature period than during a normal temperature period; a placement part in which a permanent magnet and a magnetic field control element are placed; and the blade portion, which is attached to the placement portion, wherein the blade portion exerts external force on the object to be cooked and placed in the container due to the rotation of the blade member. 2. The blade element according to claim 1, in which the magnetic field control element includes a temperature-sensitive magnetic material, the magnetism of which is weaker at high temperatures than at normal temperature. 3. The blade element according to claim 2, in which the placement part comprises an internal space in which the permanent magnet is arranged to move in it in the up and down directions; the magnetic field control element is fixed in the upper part of the inner space; and a permanent magnet is attracted by the magnetic force of the magnetic field control element to place a permanent magnet in the upper part of the internal space during normal temperature and is located in the lower part of the internal space in the high temperature period. 4. The blade element according to claim 1, in which the magnetic field control element includes a temperature-sensitive magnetic material, the magnetic permeability of which is lower in the high temperature region than in the normal temperature region, and the magnetic field control element is that it covers the bottom surface of the permanent magnet. 5. The blade element according to claim 4, in which the magnetic field control element is located so that it closes the entire permanent magnet. 6. The blade element according to claim 1, in which the placement part comprises an internal space in which the permanent magnet is placed to move therein; the magnetic field control element includes an alloy with a shape memory, the shape of which changes when its temperature changes, and provides support for a permanent magnet in the inner space, and the shape of the magnetic field control element changes so that the height position in which the magnetic field control element provides support for the permanent magnet is lower in the high temperature region than in the normal temperature region in the interior. 7. A container with a blade element containing: a container configured to house an object to be cooked, the container receiving energy from outside to generate heat; and blade element according to any one of claims 1 to 6. 8. The container with a blade element according to claim 7, in which the container contains a magnetic metal material that perceives a magnetic field of induction to generate heat, on the outer peripheral periphery of its lower surface; the blade element is located on the inner lower surface of the container with the possibility of disconnection; wherein when the blade element is located on the inner lower surface of the container, the portion for accommodating the blade element is located on the circumference side, which is more internal than the magnetic metal material of the container. 9. A device for thermal cooking, containing: a container with a blade element according to claim 7; a component for placement, configured to place a container on it; a heating component, which is located on the lower side of the component for placement, and the heating component supplies energy to the container for heating the container; and a component for creating a rotating magnetic field, which is located on the lower side of the component for placement, while the component for creating a rotating magnetic field provides a rotating magnetic field to the permanent magnet of the blade element. 10. The device for thermal cooking according to claim 9, in which the container contains magnetic metallic material on the outer circumferential periphery of its lower surface; a blade element located on the inner lower surface of the container with the possibility of disconnection; however, when the blade element is located on the inner lower surface of the container, the part for accommodating the blade element is located on the side of the circle, more internal compared to the magnetic metal material of the container; a heating component comprising a heating coil that provides induction heating of the magnetic metallic material of the container by creating an induction magnetic field; moreover a heating coil is located on the peripheral periphery of the component to create a rotating magnetic field in the component for placement.

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