JP2004150644A - Electromagnetic induction heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic induction heating device that is compact and light capable of simultaneously exerting a plurality of different functions. <P>SOLUTION: This device is provided with a flat electromagnetic induction coil 21, a first heated body (roasting plate 4) heated by the coil and disposed on the surface side of the coil, and a second heated body (steam generating plate 5) heated by the coil and disposed on the coil reverse side. When the first and the second heated bodies are heated by the coil, the first and the second heated body achieve different functions (baking function and stream generating function) from each other. Both the first and the second heated bodies comprise clad members 7 and 8 composed of temperature compensation alloy materials 71 and 81 and non-magnetic materials 72 and 82 laminated in the surface-reverse direction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electromagnetic induction heating device, and more particularly, to a small and lightweight electromagnetic induction heating device capable of simultaneously exerting a plurality of different functions.
INDUSTRIAL APPLICABILITY The present invention is suitably used for cooking heating appliances such as a gyoza fryer and a steam convection oven that can simultaneously exhibit a plurality of different functions such as a baking function and a steaming function.
[0002]
[Prior art]
Generally, in the high-frequency induction heating method, an induction current is generated in a magnetic metal by a high-frequency magnetic field generated by an electromagnetic induction coil (also referred to as a work coil). Has self-heating. Various electromagnetic induction heating devices have been manufactured utilizing this effect.
As a conventional electromagnetic induction heating device, for example, a plate-shaped electromagnetic induction coil, and a heated object (for example, a cooking pot or a cooking pot, which is heated by the electromagnetic induction coil and set on the surface side of the electromagnetic induction coil) , Plates, etc.) are known (see Patent Document 1).
In the above-mentioned conventional electromagnetic induction heating apparatus, usually, the object to be heated and the coil for electromagnetic induction are indirectly heated in one-to-one correspondence. Then, the temperature of the object to be heated is monitored by a temperature sensor or the like, the detected value is fed back, and the temperature is controlled to a target temperature arbitrarily set by the device. That is, since the temperature of the object to be heated can be approximated to a constant temperature while its temperature is detected and the control amount is changed by the deviation between the detected value and the target value, the object to be heated and the coil for electromagnetic induction are always in a one-to-one relationship. Needs to be
It should be noted that, even in a general heating device, the object to be heated and the heating source have a one-to-one relationship, similarly to the electromagnetic induction heating device.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2001-37626
[Problems to be solved by the invention]
Here, as a heating device for cooking, for example, a device requiring different functions such as a baking function and a steaming function at the same time, such as a gyoza fryer or a steam convection oven, is known.
However, in such a cooking heating device, a set of a heating source and a body to be heated are required for each function, that is, at least two sets of a heating source and a body to be heated are required, and the entire device becomes large. Problem.
In recent years, it has been known that it is effective to use high-temperature dry steam in the above-described cooking appliances in order to minimize the cooking time. There is a demand for a small and lightweight heating device having both the functions of baking and steam temperature control. Conventional and current products additionally require a device for generating steam itself. However, it is desired to omit this device and simultaneously realize steam generation and control of the steam temperature.
[0005]
As described above, the present invention has been made in view of the above situation, and has an object to provide a small and lightweight electromagnetic induction heating device capable of simultaneously exhibiting a plurality of different functions such as a baking function and a steaming function. And
[0006]
[Means for Solving the Problems]
The present inventors have completed the present invention based on the following findings.
That is, the amount of heat for controlling steam generation and steam temperature is physically determined by the amount of heat required to generate steam from water, the amount of water fixed at the set steam temperature and the supplied water, and the water temperature. You. In this case, if the amount of supplied water and the water temperature at that time are fixed, and the generated steam temperature is fixed, the capacity of the heating device (in this case, the electromagnetic induction heating device) will be decided by itself, and the steam temperature will be full to reach the set value. Heating operation is sufficient. If the heating capacity of the heating device is set to be higher than the steam generation capacity and the pipe temperature near the steam outlet can be fixed to the steam temperature to be controlled, the steam temperature will always be the control temperature. Further, if the temperature of the roasting plate surface can be fixed, the same roasting result can always be obtained only by controlling the baking time. Therefore, if the object to be heated by induction heating can be kept at a constant temperature by some means, the functions of steaming and baking can be achieved at the same time.
[0007]
An electromagnetic induction heating apparatus according to the present invention includes a flat electromagnetic induction coil, a first object to be heated which is heated by the electromagnetic induction coil and disposed on a surface side of the electromagnetic induction coil, A second object to be heated which is heated by a coil and disposed on the back side of the electromagnetic induction coil, wherein the first object and the second object to be heated are heated by the action of the electromagnetic induction coil. In this case, the functions performed by the first heated body and the second heated body are different from each other.
[0008]
In addition, each of the first heated body and the second heated body is a laminated body in which a magnetic shunt alloy material whose magnetic permeability changes with temperature and a non-magnetic material are laminated in the front and back direction. Can be.
Further, the laminate may be a clad laminate.
Further, each of the first heated body and the second heated body may have a plate shape.
Further, the first body to be heated may have a baking surface for exhibiting a firing function, and the second body to be heated may have a fluid passage for exhibiting a steam generating function.
Further, at least one of a protrusion and a groove can be formed on the baked surface.
Further, the baked surface can be coated with a fluororesin or a ceramic.
In addition, a fluid supply passage for supplying a fluid to the fluid passage may be provided near the electromagnetic induction coil.
In addition, at least one of the first heated object and the second heated object can be detachably provided to the electromagnetic induction coil.
The first member to be heated is a clad laminate obtained by laminating a magnetic shunt alloy material whose magnetic permeability changes with temperature and a non-magnetic material, and has a fired surface for exhibiting a firing function. In addition, the second object to be heated may be a spiral magnetic pipe or a stainless steel pipe for exerting a steam generating function.
It can also be used as a dumpling fryer.
Furthermore, it can be used as a steam convection oven.
[0009]
【The invention's effect】
According to the electromagnetic induction heating device of the present invention, the first and second heated objects are heated by the action of one electromagnetic induction coil, and different functions are exhibited by the first and second heated objects.
As described above, the first and second objects to be heated are disposed on the front and back sides of the coil for electromagnetic induction, and one coil for electromagnetic induction is associated with at least a pair of objects to be heated. By the action of the coil for electromagnetic induction, at least a pair of objects to be heated can be heated, and the whole can be made small and lightweight.
[0010]
Further, in the case where each of the first heated object and the second heated object is a laminate in which a magnetic shunt alloy material whose magnetic permeability changes with temperature and a non-magnetic material are laminated in the front and back direction. The first and second objects can have a self-temperature control function, and the first and second objects can suitably exhibit different functions.
Further, when the laminate is a clad laminate, manufacturing efficiency can be improved by using a clad material that is easy to handle.
Further, when both the first heated body and the second heated body are plate-shaped, it is possible to further reduce the size and weight as a whole.
In the case where the first member to be heated has a baked surface for exhibiting a firing function and the second member to be heated has a fluid passage for exhibiting a steam generating function, The firing function can be exerted on the baked surface of the body, and the steam generating function can be exerted on the fluid passage of the second heated object.
In the case where at least one of the protrusion and the groove is formed on the baked surface, the protrusion can increase the heating area and provide a more appropriate scorch, and the groove generates oil or the like generated during heating. Can be stored.
Furthermore, when the baked surface is coated with a fluororesin or ceramic, the fluororesin coating can prevent burning and smoking of the food, and the ceramic coating can suitably heat the food with far infrared rays. it can.
[0011]
In the case where a fluid supply passage for supplying a fluid to the fluid passage is provided in proximity to the electromagnetic induction coil, the electromagnetic induction coil is cooled by a fluid passing through the fluid supply passage, and an insulating member or the like is provided. Excessive temperature rise can be prevented, and the overall thermal efficiency can be increased.
In addition, when at least one of the first heated object and the second heated object is provided detachably with respect to the electromagnetic induction coil, the heated object is replaced. It is possible to change its own predetermined control temperature.
The first member to be heated is a clad laminate obtained by laminating a magnetic shunt alloy material whose magnetic permeability changes with temperature and a non-magnetic material, and has a fired surface for exhibiting a firing function. In addition, when the second heated object is a spiral magnetic pipe or a stainless steel pipe for exhibiting a steam generating function, the first heated object can have a self-temperature control function. In addition, the baking surface can exert a firing function, and the pipe body as the second heated body can exert a steam generating function.
When used as a gyoza fryer, when the gyoza is heated, the baking function and the steaming function can be suitably exhibited.
Furthermore, when it is used as a steam convection oven, when heating the foodstuffs, the baking function and the steaming function can be suitably exhibited.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The structure, plane shape, size, and the like of the “electromagnetic induction coil” are not particularly limited as long as the shape is a flat plate and a magnetic flux can be generated. Examples of the planar shape of the electromagnetic induction coil include a circular shape, a square shape, and an irregular shape.
[0013]
The material, shape, number, and the like of the “first object to be heated” are not particularly limited as long as the first object is heated by the electromagnetic induction coil and disposed on the surface side of the electromagnetic induction coil. The first body to be heated can be, for example, a laminate in which a magnetic shunt alloy material and a nonmagnetic material are laminated in the front and back direction. In this case, the first member to be heated can be formed by appropriately fixing the magnetic shunt alloy material and the non-magnetic material with fixing means (for example, screws, bolts, studs, rivets, etc.). From the viewpoint that it can be manufactured more easily, this first heated body is a clad laminate formed by joining a magnetic shunt alloy material and a non-magnetic material by an appropriate forming method (for example, rolling, explosion, welding, etc.). Preferably, there is.
Examples of the shape of the first heated object include a pot shape, a pot shape, a box shape, and the like. It is preferable that the shape of the first object to be heated is a plate shape (for example, a plate shape, a dish shape, a tray shape, etc.) from the viewpoint that the whole can be configured to be lighter and smaller. Examples of the plate-like planar shape include a circular shape, a square shape, and an irregular shape.
Further, the first object to be heated can have, for example, a baked surface for exhibiting a sintering function. The baked surface can be, for example, a flat surface (eg, flat, curved, etc.). From the viewpoint that the functionality of the baked surface can be improved, it is preferable that the baked surface is formed with a protrusion and / or a groove, or coated with a fluororesin {Teflon (registered trademark)} or ceramic.
[0014]
The material, shape, number, and the like of the “second heated object” are not particularly limited as long as it is heated by the electromagnetic induction coil and disposed on the back side of the electromagnetic induction coil. This second heated object can have, for example, the same configuration as the first heated object described above. In addition, the second object to be heated can have, for example, a fluid passage for exhibiting a steam generating function. This fluid passage usually has a spiral shape. Further, the fluid passage can be formed by, for example, a groove, a hole, or the like. From the viewpoint that the electromagnetic induction coil can be cooled, it is preferable that a fluid supply passage for supplying a fluid to the fluid passage be disposed close to the electromagnetic induction coil.
Further, the second object to be heated may be, for example, a spiral magnetic pipe or a stainless steel pipe for exhibiting a steam generating function.
[0015]
In addition, the first heated body and / or the second heated body can be provided, for example, so as not to be detachable from the electromagnetic induction coil. From the viewpoint that the object to be heated can be easily replaced, it is preferable that the first object to be heated and / or the second object to be heated is detachably provided to the coil for electromagnetic induction.
[0016]
The material of the magnetic shunt alloy may be, for example, a Ni-Fe alloy, a Ni-Cr-Fe alloy, a Ni-Cr-Co-Fe alloy, or the like. In addition, examples of the material of the nonmagnetic material include copper, aluminum, and the like.
Examples of the “function” include a baking function (for example, a roasting function), a steam generating function, a hot water generating function, and the like.
Furthermore, examples of the “steam” include dry saturated steam, wet saturated steam, and superheated steam.
[0017]
【Example】
Hereinafter, the present invention will be described in detail with reference to the drawings. In the present embodiment, a cooking heating device capable of exhibiting a grilling function and a steaming function is exemplified as the electromagnetic induction heating device.
[0018]
(1) Configuration of Cooking Heating Device As shown in FIGS. 1 to 3, a cooking heating device 1 according to the present embodiment includes a work coil portion 2 having a flat work coil 21 and a work coil portion 2. The plate for roasting 4 (illustrated as a first heated body) disposed on the front side of the plate, and the plate 5 for steam generation disposed on the back side of the work coil unit 2 (as a second heated body) This is basically configured. Therefore, in the heating device for cooking 1 according to the present embodiment, two plates 4 and 5 correspond to one work coil unit 2.
The work coil 21 is connected to the high-frequency current supply port 6.
[0019]
Further, the roasting plate 4 is formed of a clad material 7 formed by joining a magnetic shunt alloy material 71 and a non-magnetic metal material 72 in the front and back direction. As the magnetic shunt alloy material 71, a material that can be fixed at an appropriate temperature corresponding to the food material to be heated is selected. The non-joining surface of the nonmagnetic metal material 72 with the magnetic shunt alloy material 71 is formed in a substantially tray shape, and a roasting surface 721 on which food is placed is formed.
[0020]
The steam generating plate 5 is formed of a clad material 8 formed by joining a magnetic shunt alloy material 81 and a nonmagnetic metal material 82 in the front and back direction. As the magnetic shunt alloy material 81, a material that can be fixed at an appropriate temperature corresponding to generation of steam (for example, high-temperature dry steam) at a temperature suitable for a food material to be heated is selected. In the non-magnetic metal material 82, a spiral steam generation groove 821 (illustrated as a fluid passage) is formed on the joint surface side with the magnetic shunt alloy material 81. A water supply pipe 10 for supplying water into the steam generation groove 821 is connected to one end of the steam generation groove 821. The other end of the steam generation groove 821 is connected to a steam supply pipe 11 for supplying generated steam to the roasting surface 721 of the roasting plate 4. The tip side of the steam supply pipe 11 is bifurcated along both side edges of the roasting surface 721 of the roasting plate 4. A plurality of steam outlets 111 are formed at predetermined intervals on the tip side of the steam supply pipe 11.
The tip side of the steam supply pipe 11 is divided into two equal-length pipes. Therefore, the steam guided through the steam supply pipe 11 keeps a uniform pressure near the roasting surface 721 of the roasting plate 4. Further, the water supply pipe 10 can be disposed through the inside of the work coil unit 2. Thereby, the inside of the work coil unit 2 can be cooled.
[0021]
(2) Operation of Cooking Heating Device According to such a cooking heating device 1, magnetic fluxes equally generated on both front and back surfaces of the work coil portion 2 are simultaneously linked to the plates 4 and 5, and both the plates 4 and 5 are linked. , 5 are simultaneously heated to a predetermined plate temperature as appropriate. Then, the water supplied into the steam generation groove 821 of the steam generation plate 5 via the water supply pipe 10 is heated, and steam having a predetermined steam temperature suitable for food is generated. Then, this steam is guided to the roasting surface 721 side of the roasting plate 4 via the steam supply pipe 11, and is jetted to the roasting surface 721 through the numerous steam injection ports 111.
Therefore, the food material placed on the roasting surface 721 of the roasting plate 4 is appropriately roasted by the roasting plate 4, and the steam generated by the steam generating plate 5 is supplied to the roasting plate 4. State. As a result, this food is baked in an optimum state in the shortest time.
[0022]
(3) Effect of Embodiment As described above, in this embodiment, a composite device having both steaming and baking functions, such as a dumpling fryer and a steam convection oven, is combined with one work coil unit 2 (induction heating unit) and Because it is provided with two plates 4 and 5 having a temperature control function, it is extremely small in size as compared with a conventional case requiring two induction heating units and one set of steam generation unit.・ Lightweight finish is possible.
Also, a plurality of roasting plates 4 and steam generating plates 5 are prepared by changing the types of cladding materials 7 and 8 in which the magnetic shunt alloy materials 71 and 81 and the non-magnetic metal materials 72 and 82 are joined. If it is replaceable, the temperature of the roasting surface and the steam temperature can be freely changed, and optimal heating can be realized corresponding to various kinds of foods.
[0023]
It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the present invention depending on the purpose and application. That is, in the present embodiment, an example in which the electromagnetic induction heating device is applied to the heating device for cooking 1 is illustrated, but the present invention is not limited to this. For example, a heating device for cleaning, a heating device for sterilization, a heating device for drying, and the like. May be applied.
[Brief description of the drawings]
FIG. 1 is a plan view of a cooking heating device according to an embodiment.
FIG. 2 is a front view of a cooking heating device.
FIG. 3 is a rear view of the cooking heating device.
[Explanation of symbols]
Reference Signs List 1: heating equipment for cooking, 21; work coil, 4; plate for roasting, 5; plate for steam generation, 7, 8, clad material, 71, 81; magnetic shunt alloy material, 72, 82; non-magnetic metal material 721; roasting surface; 10; water supply pipe.

Claims (12)

A plate-shaped electromagnetic induction coil, a first object to be heated which is heated by the electromagnetic induction coil and disposed on the surface side of the electromagnetic induction coil, and which is heated by the electromagnetic induction coil A second heated body disposed on the back side of the
When the first heated object and the second heated object are heated by the action of the electromagnetic induction coil, the functions of the first heated object and the second heated object are different. Electromagnetic induction heating equipment. 2. Each of the first heated body and the second heated body is a laminate formed by laminating a magnetic shunt alloy material whose magnetic permeability changes with temperature and a non-magnetic material in a front-to-back direction. Electromagnetic induction heating equipment as described. The electromagnetic induction heating device according to claim 2, wherein the laminate is a clad laminate. The electromagnetic induction heating apparatus according to any one of claims 1 to 3, wherein each of the first heated body and the second heated body has a plate shape. 5. The device according to claim 1, wherein the first body to be heated has a baked surface for performing a firing function, and the second body to be heated has a fluid passage for performing a steam generating function. 6. An electromagnetic induction heating device according to the item. The electromagnetic induction heating device according to claim 5, wherein at least one of a protrusion and a groove is formed on the baked surface. The electromagnetic induction heating device according to claim 5, wherein the baked surface is coated with a fluororesin or a ceramic. The electromagnetic induction heating device according to any one of claims 5 to 7, wherein a fluid supply passage that supplies a fluid to the fluid passage is disposed near the electromagnetic induction coil. 9. The device according to claim 1, wherein at least one of the first heated object and the second heated object is detachably provided to the electromagnetic induction coil. 10. Electromagnetic induction heating equipment. The first body to be heated is a clad laminate in which a magnetic shunt alloy material whose magnetic permeability changes with temperature and a non-magnetic material are laminated in the front and back direction, and a fired surface for exhibiting a firing function. 2. The electromagnetic induction heating apparatus according to claim 1, wherein the second object to be heated is a spiral magnetic pipe or a stainless steel pipe for exhibiting a steam generating function. 3. The electromagnetic induction heating device according to any one of claims 1 to 10, which is used as a dumpling fryer. The electromagnetic induction heating device according to any one of claims 1 to 10, which is used as a steam convection oven.

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