JP5103559B2 - Electromagnetic induction heating type teppanyaki - Google Patents

Description

  The present invention relates to an iron plate baking machine, and more particularly to an electromagnetic induction heating type iron plate baking machine using an iron plate made of a magnetic shunt alloy.

  For example, teppanyaki is used to cook beefsteak, dumplings, pancakes, okonomiyaki, hamburgers, and omelets. The iron plate used in the conventional iron plate baking machine is, for example, about 19 to 25 mm thick and very heavy for reasons of improving the temperature distribution.

  Such a conventional thick and heavy iron plate takes a considerable time to raise the iron plate to a certain temperature required for cooking (for example, around 200 degrees), and conversely, after being heated once Takes a long time to cool to a safe temperature. In addition, when using such a conventional iron plate oven, especially in stores, it is necessary to always keep the iron plate in a standby state at a predetermined temperature so as to be able to respond to customers at any time. As a result, power and gas are wasted. Especially in the case of the gas heating type, there is a problem that excessive combustion exhaust gas is discharged into the room and has a great influence on the temperature environment.

  Furthermore, in order to prevent waste of electric power and gas, and to keep the iron plate temperature at a desired temperature, it has been devised to perform feedback control by attaching a temperature sensor to the back side of the iron plate in a conventional iron plate baking machine, In such a conventional configuration, since it becomes indirect sensing with respect to the iron plate surface on which the food is placed, there may be a delay in control, and in the case of a controller that is not temperature setting error or fail safe There is a risk that the iron plate will be overheated.

  Furthermore, since the conventional iron plate is thick and heavy, cleaning after use is often performed on the equipment, that is, without moving from the equipment, but the iron plate of the conventional iron plate baking oven is not necessarily suitable for such cleaning. Not a thing.

  In order to omit the temperature sensor or the like, a pan or the like using induction heating technology has been developed as disclosed in Japanese Patent No. 3079573 and Japanese Patent Laid-Open No. 4-242093.

Japanese Patent No. 3079573 Japanese Patent Laid-Open No. 4-242093

  The present invention has been made to solve such problems in the prior art, and an object of the present invention is to provide an iron plate baking machine having a simple structure in which thermal efficiency is improved by applying induction heating technology. Moreover, an object of this invention is to provide the iron plate baking machine suitable also for the iron plate cleaning on an apparatus.

The present invention provides an iron plate on which a food made using a magnetic shunt alloy that is not overheated above a predetermined Curie temperature, and a pottery main body portion that includes induction heating means for induction heating the iron plate, The iron plate is an iron plate baking machine whose temperature is controlled by the induction heating means, and the iron plate is directed downward in a plate portion on which food is placed and cooked, and a pair of opposed portions of the plate portion. It has a pair of bent parts bent and a pair of bent parts bent upward at the other pair of opposing parts, and the pottery body part is a pair of bent parts bent downward The iron plate is positioned at a predetermined position of the pottery body part by sandwiching a pair of recesses that can position the iron plate at a predetermined position of the pottery body part and the other pair of opposed parts of the iron plate. It is characterized in TEPPANYAKI device having a pair of projections which can give determined.

  In the iron plate baking apparatus, the iron plate may be formed of a plate-shaped member.

  Furthermore, in the iron plate baking machine, the pair of recesses provided in the baking machine body may be used as an oil receiving trough.

  Moreover, in the said iron plate baking machine, you may change the Curie temperature of the said iron plate.

  Moreover, the said iron plate baking machine may have the shape which arranged the said iron plate baking machine in parallel.

  ADVANTAGE OF THE INVENTION According to this invention, the iron plate baking apparatus of a simple structure with favorable thermal efficiency can be provided. Furthermore, according to this invention, the iron plate baking machine suitable also for the iron plate cleaning on an apparatus can be provided.

  Hereinafter, an iron plate baking apparatus according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 3 are a top view, a front view and a lateral view of the iron plate baking apparatus according to the present invention, respectively, FIG. 4 is a schematic view showing the internal structure of the iron plate baking apparatus according to the present invention, and FIG. It is a single perspective view. The example shown in FIG. 1 to FIG. 3 is substantially equivalent to a configuration in which two iron plate baking apparatuses having the same shape are juxtaposed. Therefore, there are two iron plates used here. However, the present invention is not limited to this. For example, three or more iron plate ovens may be substantially juxtaposed, or only one iron plate oven may be arranged. May be.

  The iron plate baking apparatus 1 mainly includes an iron plate 20 on which food is placed and a baking body main body 40 on which the iron plate 20 is placed. The iron plate 20 is simply placed on the top of the pottery body 40 and can be freely removed therefrom. By making it removable, it is possible to improve the cleanability of both the iron plate 20 and the pottery main body 40.

  The iron plate 20 was bent into a vertical plate shape downward on a rectangular plate portion 22 on which food is placed and cooked and a pair of opposing sides of the plate portion 22, for example, opposing sides at both ends in the longitudinal direction. A pair of hanging parts 24A, 24B and another pair of opposed sides of the plate part 22, for example, a pair of hanging parts 26A bent upward in a vertical plate shape at opposite sides at both ends in the direction intersecting the longitudinal direction, 26B. These plate part 22, hanging parts 24A and 24B, and hanging parts 26A and 26B can all be formed integrally. In addition, the iron plate 20 does not necessarily need to be a rectangular shape, and may be an elliptical shape, for example.

  The drooping portions 24A and 24B can be used to remove debris such as oil, scorch, and unburned residue generated during cooking from the plate portion 22. For example, the oil is naturally removed through the drooping portions 24A and 24B, and debris such as scorch and unburnt residue is removed by using the drooping portions 24A and 24B with the help of the user. The upper hanging parts 26 </ b> A and 26 </ b> B are for preventing oil and heated food material from spilling from the plate part 22. The upper hanging portions 26A and 26B are provided with handles 28A and 28B in a staggered manner, respectively. For example, the upper hanging portion 26A is on the rear side in the longitudinal direction, and the other upper hanging portion 26B is on the front side in the longitudinal direction. Are provided with handles 28A and 28B, respectively. By providing the handle 28 at the staggered position, the iron plate 20 can be carried in a stable state.

Here, a magnetic metal material, particularly a magnetic shunt alloy is used as the iron plate material. However, the actual iron plate 20 has, for example, a three-layer structure using iron as an upper layer, aluminum or copper as an intermediate layer, and a magnetic shunt alloy as a lower layer. As is well known, the magnetic shunt alloy is a special alloy whose Curie point is lowered to a predetermined temperature, and when it reaches a temperature higher than the predetermined temperature, it loses its magnetism and is not heated. Therefore, by using the magnetic shunt alloy, the iron plate itself can control the temperature and keep it constant without using a flame or performing extra heating. Since the iron plate 20 using a magnetic shunt alloy does not rise above the temperature required for cooking, it has high safety. Furthermore, when using a magnetic shunt alloy, the start-up time is very short. Therefore, it is not necessary to always keep the iron plate in a standby state in preparation for visitors, so it can be said that it is very suitable for energy saving and environmental conservation. .
In general, teppanyaki is required to heat the entire heating surface of the iron plate at a uniform temperature in order to perform cooking at a constant quality and enable cooking manuals, and various technical know-how is required for that purpose. However, in the iron plate 20 using the magnetic shunt alloy, as long as the induction heating means described below is appropriately provided, the portion reaching the Curie point is not heated and eddy current is not generated. The portion that has stopped and has not yet reached the Curie point can be kept extremely uniform at the temperature of the Curie point, for example, by continuously heating the portion.
In addition, when an object to be heated such as food is placed for cooking on a magnetic shunt alloy steel plate that is kept at a uniform temperature, the heat of the iron plate near the food is taken away by the food. As the temperature drops and falls below the Curie point, immediately only that part can start heating naturally and proceed with cooking. And the part which was away from the food and the temperature did not fall is kept at a uniform temperature while maintaining the temperature of the Curie point as it is, and it is possible to prevent excessive heating of the part not in contact with the food.

  The heating principle using a magnetic shunt alloy is well described in, for example, Japanese Patent No. 3079573 and Japanese Patent Laid-Open No. 4-242093. Therefore, only a brief explanation is given here. The iron plate 20 made of a magnetic shunt alloy generates heat when an eddy current is generated there by magnetic lines generated by induction heating means such as an induction heating coil. However, since the magnetism of the iron plate 20 is lost above the Curie temperature, no eddy current is generated, and thus the iron plate 20 is not overheated beyond a predetermined temperature. By using the iron plate 20 using such a magnetic shunt alloy, it is possible to eliminate dangers such as ignition of oil, damage due to emptying of the iron plate 20, red heat, fire, and the like. It is not necessary to provide a temperature sensor in the portion 40, and the structure of the device can be simplified. Furthermore, since the structure is simple, the operation is not hindered by a failure of the temperature controller or the like, and since there is no need to provide a program that responds to the temperature change of the iron plate 20, the detection result by the temperature sensor can be obtained. There is no need to reflect it in the software. Therefore, maintenance of the equipment is easy. Obviously, if the iron plate 20 made of a magnetic shunt alloy is used, appropriate heating cooking can be performed by controlling only the magnitude of the output and the heating time in the main body 40 without directly measuring the temperature of the iron plate 20. It can be performed. Therefore, cooking can be performed safely and reliably with a simpler structure than before. Moreover, if the iron plate 20 manufactured with the magnetic shunt alloy is used, the iron plate 20 can be made thin and lightweight, and therefore, it can be easily carried and removed from the main body 40.

  The Curie temperature of the iron plate 20 can be freely set in the vicinity of the cooking temperature corresponding to each heated object for each iron plate. By using an iron plate with a different Curie point, the temperature of the iron plate can be changed according to the situation, and it is possible to cope with any cooking. For example, if it is an iron plate used for grilled food such as beefsteak, it is used for a hamburger or the like at about 250 to 280 ° C, and if it is an iron plate used for dumplings, pancakes, okonomiyaki or the like, it is used at about 200 to 230 ° C. If it is an iron plate, it may be set to around 180 ° C. or about 130 to 150 ° C. if it is an iron plate used for egg dishes such as omelet. However, the Curie temperature once set cannot be changed. Therefore, these iron plates are used as a dedicated iron plate for a specific object to be heated.

  In order to generate an eddy current in the iron plate 20, at least an induction heating means, for example, an induction heating coil 42 is provided in the main body 40. An example of the induction heating coil is shown in FIG. The induction heating coil 42 is disposed on the upper plate 46 of the baking body main body 40, and the upper portion thereof is usually covered with a heat-resistant glass plate 50 with a slight gap. Therefore, in the normal state, the induction heating coil 42 cannot be seen from the outside. Therefore, FIG. 6 may be considered to show a state in which the heat-resistant glass plate 50 is removed. Note that the induction heating coil 42 shown in FIG. 6 has a size and a shape corresponding to only one iron plate for convenience. Therefore, as in the example shown in FIGS. 1 to 3, when the same-shaped iron plate baking apparatus is used in substantially juxtaposed manner, as many induction heating coils 42 as shown in FIG. 6 are provided. You can think of it. The induction heating coil 42 is formed by winding one long coil in a predetermined shape by using a plurality of clasps 44, and both ends thereof are provided on the upper plate 46 of the device. The hole 48 is connected to an inverter (described later) in the pottery main body 40. Further, the induction heating coil 42 has a rectangular shape in the surface direction according to the shape of the iron plate 20, more specifically, a set of a plurality of rectangular annular coils, that is, the smallest first annular coil disposed near the center. 42A, a second annular coil 42B arranged so as to wrap around the outside, and a third annular coil 42C arranged so as to wrap around the outside, and the plate of the iron plate 20 is formed. The size is set to cover the entire area of the portion 22. Thus, by arranging the plurality of annular coils 42A to 42C in a winding manner, it is possible to efficiently generate magnetic lines of force on the iron plate 20 and to efficiently generate eddy currents.

  In order to effectively heat the iron plate 20 by the induction heating coil 42, the position of the induction heating coil 42 and the position of the iron plate 20 need to correspond to each other. For example, a linear protrusion 52 for positioning the iron plate 20 may be provided at a predetermined position of the heat-resistant glass plate 50 on which the iron plate 20 is placed so that the iron plate 20 is not mistakenly shifted. These protrusions 52A to 52C are arranged in parallel in a state of being separated from each other in a direction crossing the longitudinal direction of the iron plate 20, for example. When the iron plate 20 is placed on the heat-resistant glass plate 50, the hanging portions 26A and 26B provided on the pair of opposite sides of the plate portion 22 are sandwiched between the protruding portions 52A to 52C. Thus, the shift of the iron plate 20 in the direction intersecting the longitudinal direction of the iron plate 20 can be effectively prevented.

  Further, in order to prevent the iron plate 20 from shifting in the longitudinal direction, a pair of recesses 54A and 54B are provided at positions where the hanging portions 24A and 24B of the iron plate 20 placed on the heat-resistant glass plate 50 are respectively fitted. May be. By placing the iron plate 20 on the pottery main body 40 so that the hanging part 24 is fitted in the recesses 54, the iron plate 20 is positioned on the pottery main body 40 in the longitudinal direction of the iron plate 20. An unnecessary shift of the iron plate 20 can be prevented. If the above-mentioned protrusions 52A to C are also used, the iron plate 20 is positioned at a predetermined position of the heat-resistant glass plate 50 in all directions surrounding the four sides. The recesses 54A and 54B also have a role for positioning the iron plate 20 as described above, but can also be used as an oil receiving trough. That is, oil, debris, and the like removed from the plate portion 22 using the hanging portion 24 of the iron plate 20 can be temporarily stored in the concave portions 54A and 54B. In addition, you may provide the overhang | projection part 56 which can be utilized as a cooking table etc. in the further front side of the recessed part 54A in a user's near position.

  In addition to the induction heating coil 42, the baking main body 40 is provided with various devices related to cooking. For example, a control / operation panel 70 is provided outside the apparatus. Further, an inverter unit 72 that controls the generation of magnetic lines of force by the induction heating coil 42 and adjusts the iron plate temperature is disposed adjacent to the bottom of the apparatus so as to cool the inverter unit 72. The inverter cooling fan 74 may be further provided with a coil cooling fan 76 disposed below the coil in order to cool the induction heating coil 42. The air for cooling the apparatus is taken into the apparatus from, for example, an intake port 78 provided at the front bottom of the apparatus, circulated through the apparatus, and then extended upward, for example, to the back side of the apparatus Is discharged to the outside from the cooling air discharge port 82 of the chimney 80 provided in the above.

  Finally, with reference to FIG. 7, the operation of the iron plate baking apparatus according to the present invention will be described. When the power switch is turned on (step S1), the heating switch is turned on (step S2), and the coil cooling fan 76 and the inverter cooling fan 74 are turned on (step S3). The coil cooling fan 76 and the inverter cooling fan 74 are turned on not only when the inverter internal air is in a high temperature state but also during a predetermined time (for example, 5 minutes) during operation or after operation. Next, it is checked whether or not various safety devices are operating normally (step S4). For example, when the inverter unit 72 is overheated (step S6), when the iron plate 20 is not placed on the heat-resistant glass plate 50 (step S7), or when a communication error occurs in the apparatus (step S8). ), Various alarms are turned on (step 9), and the heating operation is stopped (step S10). In this case, the heating operation is not performed until the cause of the alarm is removed, the cause is removed (step S11), the heating switch is turned on again (step S2), and the heating operation is started again for the first time. The In step S4, when various safety devices are operating normally, cooking is started (step S5). That is, the output of the inverter is increased (step S12), and as a result, the temperature of the iron plate 20 rises due to the influence of the lines of magnetic force. When the temperature of the iron plate 20 does not exceed the Curie temperature (step S13), the output of the inverter is further increased (step S12). However, when the temperature of the iron plate 20 exceeds the Curie temperature (step S13), on the contrary, the output of the inverter is reduced (step S14). As a result, the temperature of the iron plate 20 decreases, but when the temperature of the iron plate 20 still exceeds the Curie temperature (step S15), the output of the inverter is further reduced (step S14). Thereafter, when the temperature of the iron plate 20 becomes lower than the Curie temperature (step S15), the output of the inverter is increased again (step S12). By repeating these operations, the temperature of the iron plate 20 can be self-controlled. Although not specifically shown in the flowchart, when the power switch is turned off, all the devices are turned off except that the coil cooling fan 76 and the inverter cooling fan 74 are operated for a predetermined time thereafter. Thereby, the operation of the iron plate baking machine is completely completed.

  It can be widely used for so-called teppanyaki.

It is a top view of the iron plate baking apparatus by one Embodiment of this invention. It is a front view of the iron plate baking apparatus of FIG. It is a side view of the iron plate baking apparatus of FIG. It is the schematic which shows the internal structure of the iron plate baking apparatus by one Embodiment of this invention. It is a perspective view of an iron plate simple substance. It is a figure which shows the induction heating coil used in one Embodiment of this invention. It is a flowchart which shows the operation example of the iron plate baking apparatus by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Iron plate baking machine 20 Iron plate 22 Plate part 24 Hanging part 26 Upper hanging part 28 Handle 40 Burning machine main body part 42 Induction heating coil 44 Clasp 46 Upper board 48 Hole 50 Heat-resistant glass plate 52 Projection part 54 Recessed part 56 Overhang part 70 Control and operation Panel 72 Inverter unit 74 Inverter cooling fan 76 Coil cooling fan 78 Air inlet 80 Chimney 82 Cooling air outlet

Claims (5)

An iron plate on which foodstuffs made using a magnetic shunt alloy are not overheated above a predetermined Curie temperature, and an oven main body provided with induction heating means for induction heating the iron plate, The iron plate is an iron plate baking machine controlled in temperature by the induction heating means,
The iron plate includes a plate portion for heating and cooking with ingredients, a pair of bent portions bent downward at a pair of opposing portions of the plate portion, and an upward bending at another pair of opposing portions. A pair of bent portions,
The pottery body part includes a pair of recesses that can fit the pair of bent parts bent downward and can position the iron plate at a predetermined position of the pottery body part, and another pair of the iron plate. An iron plate baking machine comprising a pair of protrusions that can position the iron plate at a predetermined position of the baking body main body portion with the opposite portion of the iron plate sandwiched therebetween.   The iron plate baking machine according to claim 1, wherein the iron plate is composed of a plate-like member.   The iron plate baking machine according to claim 1 or 2, wherein the pair of recesses provided in the baking machine main body part can be used as an oil receiving trough.   The iron plate baking machine according to any one of claims 1 to 3, wherein the Curie temperature of the iron plate is changed.   The iron plate baking machine according to any one of claims 1 to 4, having a shape in which a plurality of the iron plate baking tools are juxtaposed.

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