JP2014216114A - Induction heating cooker - Google Patents

Abstract

[PROBLEMS] To limit the place where cooking objects are placed on the cooking heating plate in a cooking device in which cooking objects are placed directly on a cooking heating plate without using a saucer or a grill. Even if it does not do, in automatic cooking, especially the back side of a to-be-cooked item can be cooked with a good finish. SOLUTION: A plurality of temperature detecting means 9 for detecting the temperature of a plate body 16 of a cooking heating plate 7 made of a material having high heat conductivity, which is difficult to be induction-heated, are provided. Regardless of the place where the food item 4 is placed, the temperature detection means 9 detects the temperature detected by the temperature detection means that detects the lowest temperature among the temperatures in a predetermined time, and controls the heating output. Since the temperature on the back side of the object to be cooked 4 can be detected, in the automatic cooking, particularly the back side of the object to be cooked 4 can be baked well. [Selection] Figure 1

Description

  The present invention relates to an induction heating cooker in which an object to be cooked is directly placed on a plate and cooked without using a saucer or a grill.

  A conventional induction heating cooker of this type is, for example, as disclosed in Patent Document 1, a main body that constitutes an outer shell, a top plate on which a heated cooking container is placed, and a heating plate that is positioned below the top plate. A heating coil for heating the cooking container, a grill device located below the heating coil, an exhaust pipe provided above or behind the grill device, and a grill door that covers the opening of the grill device and is openable and closable The grill device is a double-sided grilling device in which an upper heating body and a lower heating body are arranged, and covers the upper heating body, a cooking chamber incorporating the lower heating body, and the upper portion of the lower heating body. And a heating plate for cooking to be placed on the bottom plate, the bottom plate is in a substantially flat state, and is made of crystallized glass having high heat resistance and insulation, and the lower heating body is Grill heating carp that performs induction heating And a cooking circuit that has a drive circuit for supplying a high-frequency output for induction heating to the grill heating coil and places the food directly on the cooking heating plate for cooking. In addition, it is said that automatic cooking can be made possible by providing temperature detection means for detecting the temperature of the cooking heating plate and controlling the temperature of the cooking heating plate to an optimum temperature for cooking.

JP 2010-267422 A

However, in the conventional method, in the case where there is one temperature detecting means for detecting the temperature of the cooking heating plate via the bottom plate, the temperature detection is performed depending on the place where the cooking object is placed even if the same cooking object is used. A difference occurs in the temperature detected by the means. FIG. 9 and FIG. 10 show the temperature detecting means 9 provided at the substantially center and below the bottom plate 8 by using the cooking heating plate 7 made of a material having a substantially uniform temperature distribution and excellent thermal conductivity. It is a figure at the time of mounting the to-be-cooked object 4 in a respectively different position using one. FIG. 11 shows the temperature detected by the temperature detecting means 9 in FIGS. 9 and 10 and the temperature on the back side of the object to be cooked in FIG. 10 when heated with the same heating power in FIGS. 9 and 10. FIG. Note that the temperature θ1 in FIG. 11 is a predetermined temperature set in advance according to the menu, the load amount, and the like. When the temperature detected by the temperature detecting means 9 reaches a predetermined temperature θ1, the predetermined temperature θ1 is controlled by controlling the heating of only the lower heating means or both the lower heating means (heating coil) and the upper heating means. The object to be cooked 4 is baked by adjusting the temperature (hereinafter referred to as temperature control) so as to keep it. As shown in FIG. 9, in the case where the temperature detection means 9 is one and the food 4 is placed immediately above, the heat from the upper heating means is blocked by the food 4 and the food is cooked. Since the back surface side of the object 4 is in contact with the cooking heating plate 7, the temperature detection means 9 detects the temperature rising speed slower than the empty baking state where the object 4 is not placed, and the time t2 The predetermined temperature θ1 is reached (a in FIG. 11). On the other hand, as shown in FIG. 10, when there is only one temperature detecting means 9 and the food 4 is not placed immediately above, the air is emptied by the heat from the upper heating means and the heat from the lower heating means. Since it is in a baked state, the temperature increasing speed detected by the temperature detecting means 9 is faster than when the food 4 is placed directly above the temperature detecting means, and reaches the predetermined temperature θ1 at time t1. It reaches (b in FIG. 11). However, the temperature rise speed on the back side of the object 4 in FIG. 10 is slower than a in FIG. 11 (c in FIG. 3). The reason for this is that the temperature detected by the temperature detecting means 9 that is in the baked state reaches θ1 earlier than the temperature on the back side of the actual cooking object 4, so that the temperature is controlled after reaching the temperature. Is controlled. By controlling the heating, the temperature rise of the cooking heating plate 7 is moderated, and the temperature rise speed on the back side of the cooking object 4 is also slowed. If the temperature rise speed on the back side of the object to be cooked 4 is slow, the cooking condition on the back side of the object to be cooked 4 becomes sweet when cooked in the same time. For the above reasons, in automatic cooking in which heating control is performed based on temperature information detected by the temperature detection means, if there is only one temperature detection means, the baking on the back side of the food to be cooked is particularly dependent on the place where the food is placed. There is a problem that a difference occurs in condition.

  The present invention solves the above-mentioned conventional problems, and in an induction heating cooker in which a cooking object is directly placed on a heating plate for cooking without using a saucer or a grill, It is an object of the present invention to provide an induction heating cooker that can cook the back side of an object to be cooked with a good finish, particularly in automatic cooking, without restricting the place on the heating plate for cooking. And

  In order to solve the above-described conventional problems, an induction heating cooker according to the present invention includes a plate body on which an object to be cooked is placed, which is difficult to be induction-heated and made of a material having high thermal conductivity, and the back surface of the plate A heating plate for cooking, which is provided in close contact with the heating element made of a material to be induction-heated, and a heating coil which is provided below the cooking heating plate and performs induction heating And the grill device which has the upper heating means provided in the upper part of the cooking heating plate inside, the bottom plate provided so that the upper part of the lower heating means may be covered, and the high frequency output for performing induction heating to the heating coil are supplied A drive circuit, a control means for controlling the heating output of the lower heating means and the upper heating means, and a plurality of temperature detection means for detecting the temperature of the plate body of the cooking heating plate via the bottom plate, Duplicate Temperature detecting means detects, among the temperature in a predetermined time, an induction heating cooker, characterized in that employing the sensed temperature of the temperature detecting means detects the lowest temperature, controls the heating output. Thereby, even if there is no restriction | limiting of the mounting place of a to-be-cooked object, the temperature of the contact surface where the to-be-cooked object and the plate main body of a cooking heating plate contact can be detected, and the temperature of the contact surface was detected. By adopting the detection temperature of the temperature detection means and performing the heating control, the baking condition on the back side of the food to be cooked in automatic cooking can be satisfactorily finished.

  The induction heating cooker according to the present invention uses the detection temperature of the temperature detection unit that detects the lowest temperature among the detection temperatures of the plurality of temperature detection units that detect the temperature of the plate body of the cooking plate with high thermal conductivity. By adopting and controlling the heating output, the back side of the food to be cooked can be prevented from being burnt regardless of the place on the cooking heating plate of the food to be cooked, and can be baked well.

The figure which shows schematic structure figure of the induction heating cooking appliance in Embodiment 1 of this invention. The figure showing the top view and sectional drawing of the heating plate 7 for cooking in Embodiment 1 of this invention. The perspective view of the grill apparatus of the induction heating cooking appliance in Embodiment 1 of this invention The figure which mounted the to-be-cooked item in the center of the heating plate for cooking in Embodiment 1 of this invention. The figure showing the detection temperature of the temperature detection means in FIG. The figure showing the positional relationship of the heat generating body provided in the plate main body 16, and the temperature detection means in Embodiment 2 of this invention. The figure showing the positional relationship with the temperature detection means in the waveform with the unevenness | corrugation on the surface side of the plate main body 16 of the heating plate for cooking in Embodiment 3 of this invention. The figure showing the positional relationship of the heating plate for cooking which is the corrugated wave plate with the unevenness | corrugation by which the back surface side was substantially uniform along the uneven | corrugated shape of the surface side in Embodiment 3 of this invention. The figure by which the to-be-cooked object is mounted directly on the temperature detection means in the conventional induction heating cooking appliance. The figure by which the to-be-cooked object is not mounted directly on the temperature detection means in the conventional induction heating cooking appliance. 9 and FIG. 10 in the conventional induction heating cooker, the detected temperature of the temperature detecting means 9 of FIG. 9 and FIG. 10 when heated with the same heating power, and the temperature of the back side of the object to be cooked in FIG. Figure represented

  The first invention is a material that is placed on the object to be cooked, is not easily heated by induction, is made of a material having high thermal conductivity, and is provided in close contact with the back surface of the plate and is induction-heated. A cooking heating plate having a heating element configured, a lower heating means composed of a heating coil for performing induction heating provided below the cooking heating plate, and an upper heating provided above the cooking heating plate A grill apparatus having a means inside, a bottom plate provided so as to cover the lower heating means, a drive circuit for supplying a high frequency output for induction heating to the heating coil, and heating of the lower heating means and the upper heating means A control means for controlling the output, and a plurality of temperature detection means for detecting the temperature of the plate body of the cooking heating plate via the bottom plate, the control means at a predetermined time detected by the plurality of temperature detection means By adopting the detection temperature of the temperature detection means that detects the lowest temperature of the temperature, and controlling the heating output, the cooking heating plate can be used regardless of the place on the cooking heating plate. Since the temperature of the back side of the cooking object to be in contact can be detected, the back side of the cooking object can be baked well in automatic cooking in which heating is controlled based on the temperature of the back side of the cooking object.

  The second aspect of the invention is particularly the induction heating cooker of the first aspect of the invention, wherein the temperature detecting means is provided on the cooking heating plate, excluding a heating element made of a material to be heated by induction. The temperature detection means prevents the heat of the heating element itself from being directly detected, and the temperature of the plate body of the cooking heating plate on which the object to be cooked is placed is more accurate. Can be detected.

  3rd invention is the induction heating cooking appliance of 1st or 2nd invention especially, The said heating plate for cooking is a corrugation with the surface side of the plate main body which mounts a to-be-cooked object with an unevenness | corrugation, The temperature detection means is provided below the convex portion on the surface side of the plate body of the cooking heating plate that comes into contact with the object to be cooked, so that the temperature detection means is provided on the plate body of the cooking heating plate in contact with the object to be cooked. The temperature of the convex portion on the front surface side, that is, the temperature on the back surface side of the object to be cooked can be detected with higher accuracy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of an induction heating cooker according to Embodiment 1 of the present invention.

FIG. 3 is a perspective view of the grill device of the induction heating cooker in Embodiment 1 of the present invention. In addition, although the temperature detection means 9 which detects the temperature of the plate main body 16 (illustrated in FIG. 2) of the cooking heating plate 7 is shown in FIG. As long as the temperature on the back side of the object to be cooked can be detected in the range where the object to be cooked is placed, the present invention is not limited to the illustrated number and arrangement. In FIG. 1, the induction heating cooker in this Embodiment 1 has the grill apparatus 1 which has the cooking chamber 2 which opened the front surface, covered the opening, and was arrange | positioned so that opening and closing was possible, and the grill apparatus 1 inside An upper heating means 5 for heating the object to be cooked 4 from above and a lower heating means (heating coil) 6 for heating from below are attached. The upper heating means 5 is composed of an infrared heater, which generates heat when a commercial power supply voltage is applied, and can cook the food 4 to be cooked. A bottom plate 8 provided so as to cover the lower heating means (heating coil) 6 and a cooking heating plate 7 for cooking the dish 4 directly on the bottom plate 8 are arranged. The cooking heating plate 7 is a grill. It is attached to and detached from the cooking cabinet 2 in conjunction with opening and closing of the door 3. The bottom plate 8 is substantially planar and is made of crystallized glass having high heat resistance and insulation. The temperature detection means 9 is composed of a thermistor and is provided below the bottom plate 8, and detects the temperature of the cooking heating plate 7 via the bottom plate 8. In the present embodiment, the temperature detecting means 9 is constituted by a thermistor. However, the present invention is not limited to this. For example, if an infrared sensor is used, the temperature of the cooking heating plate can be detected with higher accuracy. The detected temperature information is stored in the storage means 14. The clock means 15 measures time. The control means 11 sends a signal to the heating control means 13 based on the information in the storage means 14 and the time information from the clock means 15. The control means 11 receives information from the operation unit 12 and sends a signal to the heating control means 13. The drive circuit 10 supplies a high frequency output for induction heating to the lower heating means (heating coil) 6. The heating control means 13 controls the energization of the upper heating means 5 and the lower heating means (heating coil) 6 based on information from the control means 11.

  FIG. 2 is a diagram illustrating a plan view and a cross-sectional view of cooking heating plate 7 in the first embodiment of the present invention. In FIG. 2, the plate body 16 and the heating element 17 constitute a cooking heating plate. The material of the plate body 16 is aluminum that is not easily heated by induction and has high thermal conductivity, and the heating plate for cooking is induction-heated by insert-molding stainless steel having high magnetic permeability as a heating element 17 on the bottom surface portion. It is. Note that the number and size of the heating elements are not limited to those shown in the drawings, and any structure may be used as long as the plate body is heated uniformly. Since the plate body 16 on which the food 4 is placed is made of aluminum having good thermal conductivity, there is little uneven heating, good heating efficiency, and quick heating. In addition, about a material, you may use copper etc. with high heat conductivity for a base, and iron etc. with high magnetic permeability may be used for a bottom part. Further, in the present embodiment, the insert-molded one is used, but it may be fixed integrally by caulking, screwing, welding or the like.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, the cooking object 4 is directly placed on the cooking heating plate 7, the grill door 3 is closed, information such as a cooking menu and heating power is input from the operation unit 12, and cooking is started. The input signal is received by the control means 11, and the signal is sent to the heating control means 13, and energization to the upper heating means 5 and the lower heating means (heating coil) 6 is started based on the signal. . When energization is started, cooking is performed by radiant heat from the upper heating means 5 and conduction heat generated by heating of the heating element 17 provided in the cooking heating plate 7 by electromagnetic induction of the lower heating means (heating coil) 6. The temperature of the plate body 16 of the heating plate 7 increases. The temperature of the plate body 16 of the cooking heating plate 7 is detected via the bottom plate 8 by the plurality of temperature detecting means 9 immediately after the start of cooking. FIG. 4 is a diagram in which the object to be cooked 4 is placed on the temperature detecting means 9e when three temperature detecting means 9b, 9e, and 9h are used. FIG. 5 is a diagram illustrating the detected temperatures detected by the three temperature detecting units in FIG. 4 after the start of cooking. The temperature detection means 9b and the detection temperature of 9h are shown as one detection temperature because the temperature distribution of the cooking heating plate is uniform and substantially the same. The storage means 14 detects the detected temperatures θ2 and θ3 detected by the three temperature detecting means at the predetermined time t2 measured by the clock means 15, respectively.
Remember. The control unit 11 employs the lowest detected temperature among the detected temperatures stored in the storage unit 14. After the elapse of the predetermined time t2, a signal for controlling energization of the upper heating means 5 and the lower heating means (heating coil) 6 based on the information of the temperature detection means 9e for detecting the adopted detection temperature (θ2), Send to heating control means 13. In FIG. 5, based on the temperature detected by the lowest temperature detecting means 9e among the temperatures detected by the temperature detecting means, the temperature is adjusted at a predetermined temperature (θ4) determined in advance by a cooking menu or a cooking course. Further, the heating control is performed by the heating control means 13. In the present embodiment, the place where the object 4 is to be placed is placed right above the temperature detecting means 9e. However, the present invention is not limited to this, and for example, the place to be cooked 4 is placed. When the place is placed on the temperature detection means 9b, the detection temperature of the temperature detection means 9b is the lowest at the predetermined time t2, so that the control means 11 Heating control is performed based on the temperature detected by the temperature detecting means 9b. The predetermined temperature θ4 is not limited to the temperature control temperature, and may be, for example, a switching temperature to the next process.

  As described above, in the present embodiment, a plurality of temperature detection means for detecting the temperature of the plate body of the cooking heating plate are provided, and the control means includes the temperature at a predetermined time detected by the plurality of temperature detection means. The temperature detected by the temperature detecting means that detects the lowest temperature is adopted, and the heating output is controlled to detect the temperature of the contact surface between the cooking object and the plate body regardless of the place where the cooking object is placed. Therefore, by performing heating control based on the detected temperature, insufficient baking on the back side of the object to be cooked can be prevented and cooking can be performed with good finish.

  In addition, by using an infrared sensor for at least one of the plurality of temperature detection means, the temperature of the plate body of the cooking heating plate can be detected directly via the bottom plate. Temperature accuracy can be further improved.

(Embodiment 2)
FIG. 6 is a diagram showing the positional relationship between the heating element 17 provided on the cooking heating plate and the temperature detection means 9 in Embodiment 2 of the present invention. The heating element 17 and the plate body 16 constitute a cooking heating plate. The temperature detecting means 9 is provided below the portion where the heating element made of a material to be induction-heated is removed. In FIG. 6, the number of temperature detecting means 9 and heating elements 17 is not limited to that shown in the figure.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The plate body 16 is heated by the radiant heat from the upper heating means 5 and the conduction heat from the heating element 17 generated by the electromagnetic induction of the lower heating means (heating coil) 6, and the temperature rises. Cooked. When predetermined heating control predetermined by a cooking menu or heating power is performed, the temperature of the heating element 17 itself may be higher than the temperature of the plate body 16 due to induction heating by the lower heating means (heating coil) 6. Even in such a case, in order to detect the temperature of the plate main body 16 more accurately by the temperature detection means 9, the temperature below the heating element 17 is not provided so that the temperature of the heating element 17 itself is not detected. It is necessary to arrange the detection means 9.

(Embodiment 3)
FIG. 7 is a diagram showing the positional relationship with the temperature detection means in a corrugated shape in which the surface side of the plate body 16 of the cooking heating plate is uneven in the third embodiment of the present invention. FIG. 8 shows the positional relationship between the temperature detection means and the heating plate for cooking, which is a corrugated corrugated corrugated shape in which the back side is substantially flattened along the concave-convex shape on the front side, in Embodiment 3 of the present invention. FIG.

As shown in FIG. 7 and FIG. 8, the surface side of the plate body 16 is formed into a corrugated corrugated shape, thereby preventing oil and moisture coming out of the food item during cooking from reattaching to the food item. effective.
In addition, as shown in FIG. 8, by reducing the weight of the cooking heating plate by making the back surface side of the cooking heating plate into a corrugated shape with unevenness substantially uniformed along the unevenness shape on the front side, Since the usability is improved and the heat mass is reduced, there is an advantage that the temperature rise of the plate body 16 is accelerated and the cooking time can be shortened.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In the case of the corrugated plate main body 16 having an uneven surface side as shown in FIGS. 7 and 8, the food to be cooked is placed in contact with the convex portion on the surface side of the plate main body 16, so In order to detect the temperature on the side, it is necessary to detect the temperature of the convex portion of the plate body 16. For that purpose, the temperature detection means 9 is provided below the convex portion on the front side of the cooking heating plate, so that the temperature on the back side of the cooking object that is actually in contact with the cooking object can be detected. . As shown in FIG. 8, in the case of a corrugated back surface, only the portion located above the temperature detection means on the back surface side of the plate body 16 is raised in the direction of the bottom plate 8 ( The temperature detecting means 9 may have a shape that makes it easy to detect the temperature of the plate main body 16.

  As described above, the induction heating cooker according to the present invention is a plate of a cooking heating plate in an induction heating cooking device in which an object to be cooked is directly placed on a plate without using a saucer or a grill. Multiple temperature detectors that detect the temperature of the main body are provided, and the temperature detected by the temperature detector that detects the lowest temperature among the temperatures detected by multiple temperature detectors is used to control the heating output. By doing this, the temperature on the back side of the food item can be detected regardless of the place where the food item is placed. Therefore, it can be applied to an induction heating cooker equipped with a grill device for home use or business use, such as a built-in type or a stationary type used on a stand.

DESCRIPTION OF SYMBOLS 1 Grill apparatus 2 Cooking chamber 3 Grill door 4 To-be-cooked object 5 Upper heating means 6 Lower heating means (heating coil)
DESCRIPTION OF SYMBOLS 7 Cooking heating plate 8 Bottom plate 9 Temperature detection means 10 Drive circuit 11 Control means 12 Operation part 13 Heating control means 14 Memory | storage means 15 Clock means 16 Plate body 17 Heating body

Claims (3)

Place the object to be cooked in the cooking chamber, and it is made of a material that is hard to be induction-heated and made of a material having high thermal conductivity, and a material that is in close contact with the back surface of the plate body and that is induction-heated A cooking heating plate provided with a heating element, a lower heating means constituted by a heating coil for performing induction heating provided below the cooking heating plate, and the cooking target provided above the cooking heating plate A grill device having an upper heating means for heating an object from above; the grill device is provided with a bottom plate provided so as to cover the upper portion of the lower heating means; A driving circuit for supplying a high-frequency current for performing induction heating to the heating coil; and a control means for controlling a heating output of the lower heating means and the upper heating means, and the lower heating means via the bottom plate The A plurality of temperature detecting means for detecting the temperature of the plate body of the cooking heating plate is provided, and the control means starts heating at a predetermined heating output and is detected by the plurality of temperature detecting means at a predetermined time. An induction heating cooker that employs the detected temperature of the temperature detecting means that detects the lowest temperature among the temperatures and controls the heating output. The induction heating cooker according to claim 1, wherein the temperature detection means is provided below a portion of the cooking heating plate from which the heating element portion is removed. The cooking heating plate has a corrugated shape on the surface side of the plate main body, and the temperature detecting means is provided below a convex portion on the surface side of the cooking heating plate in contact with an object to be cooked. Item 3. The induction heating cooker according to item 1 or 2.

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