JP6793028B2 - Cooker - Google Patents

Description

The present invention relates to a cooker including a plurality of heating parts for heating a cooking utensil. In particular, the present invention relates to a cooking cooker capable of cooking in a state where a large cooking utensil is laid over a plurality of heating parts.

Generally, in a cooking device having a plurality of heating parts such as a stove burner and a heating coil, cooking utensils having a size within the range that can be heated by each heating part are placed on each heating part, and cooking can be performed independently. Will be done. On the other hand, in order to cook a large amount of food to be cooked at one time, a large cooking utensil such as a cooking plate or a cooking pot that is sufficiently larger than the range that can be heated by one heating unit may be used. In order to cook such a large cooking utensil without using a dedicated heating cooker, it has been proposed to cook such a large cooking utensil in a state where the cooking utensil is laid over a plurality of heating parts (for example, a patent). Document 1).

Japanese Unexamined Patent Publication No. 2011-29097

By the way, in the heating cooker of Patent Document 1, there is a case where each of a plurality of heating parts is individually cooked using a cooking utensil, and a case where a large cooking utensil is laid over a plurality of heating parts. In order to distinguish from the case, a sub-electromagnetic induction coil that detects eddy current is provided in the middle part between the two heating parts, and whether or not the coil eddy current is detected when the output is output to the sub-electromagnetic induction coil. , Confirmed the presence of large cookware on the top plate.

However, if a large cooking utensil is used over a plurality of heating parts, the cooking utensil will be detected by the sub-electromagnetic induction coil in the middle part between the heating parts even if the cooking utensil is displaced to some extent from front to back and left and right. .. As a result, the cooking utensil is heated in the heating part where the deviation of the cooking utensil is small, while the temperature of the cooking utensil does not rise in the heating part where the deviation of the cooking utensil is large, and excess or deficiency is likely to occur in heating. Moreover, since the sizes of the cooking utensils vary, if cooking is performed with a cooking utensil of an arbitrary size and the cooking utensils are displaced, partial heating or deficiency is likely to occur. As a result, there is a problem that the progress state of cooking differs in each heating part, and not only the cooking utensil becomes locally hot, but also the top plate becomes hot due to the radiant heat.

The present invention solves the above-mentioned problems, and an object of the present invention is to reduce excess or deficiency of heating in a state where a large cooking utensil is hung on a plurality of heating parts, thereby cooking. It is an object of the present invention to provide a cooking device having excellent finished product and high safety.

The present invention includes a top plate and a plurality of heating portions arranged at a predetermined distance from each other, and a large cooking utensil having a predetermined size and a substantially square shape is laid on the plurality of heating portions. It is a cooking device that can be heated in the state of being cooked.
Each heating part is composed of a heating coil.
Large cookware is set to sit in place on the top plate.
A corner sensor that detects the presence or absence of a cooking utensil is located below the top plate corresponding to at least three corners when a large cooking utensil is placed in a predetermined position .
A cooking mode setting means that can set a large cooking mode for cooking using a large cooking utensil,
When the large cooking mode is set by the cooking mode setting means, the cooking utensil determination means for determining whether or not the cooking utensil is detected by the corner sensor and
A heating control means that controls the heating amount of a plurality of heating units,
It has a temperature sensor that detects the temperature of the cooking utensil on each heating unit provided in each heating unit.
In the heating control means, when the number of corner proximity sensors that detect cooking utensils becomes two or less during cooking in the large cooking mode, the temperature difference between the detection temperatures of the temperature sensors of each heating unit is less than a predetermined threshold value. Determine if it is
When the temperature difference between the detection temperatures of the temperature sensors of each heating unit is less than a predetermined threshold value, all the heating units are used until at least three corner proximity sensors detect the cooking utensil within the predetermined resetting determination time. Reduce the amount of heating in
When the temperature difference between the detection temperatures of the temperature sensors of each heating unit is equal to or greater than a predetermined threshold value, all the heating units are used until at least three corner proximity sensors detect the cooking utensil within the predetermined resetting determination time. It is a cooking device that stops the heating in .

In the above-mentioned cooking utensil, when cooking with a large cooking utensil spread over a plurality of heating parts, a large cooking utensil having a predetermined size and a substantially square shape is used as a dedicated cooking utensil. Therefore, when the large cooking utensil is properly arranged on the plurality of heating portions, the corner portions are fixed in a predetermined position on the top plate. The cooking cooker detects the presence or absence of cooking utensils at a position below the top plate corresponding to at least three corners when a large cooking utensil having a substantially square shape is placed at a predetermined position. Since it has a part proximity sensor, it is possible to accurately and reliably determine whether or not a large cooking utensil is displaced from a predetermined position.

Further , according to the above-mentioned cooking cooker, since it has a cooking mode setting means for setting a dedicated large cooking mode, it is not a case where cooking is individually performed by using a cooking utensil in each of a plurality of heating units, but a large cooking utensil. Only in the case of cooking by using the above, the corner portion proximity sensor can be used to determine whether or not a cooking utensil is placed, and the heating amount of a plurality of heating portions can be controlled based on the determination result. In addition, since the presence or absence of cooking utensils is determined by the corner portion proximity sensor only when the large cooking mode is set by the cooking mode setting means, when cooking independently using the cooking utensils in each of the plurality of heating units. In addition, it is possible to prevent erroneous detection of the corner proximity sensor when cooking utensils that are not used for cooking are placed on the top plate.
Further, if the number of corner proximity sensors that detect the cooking utensil is two or less during cooking, there is a possibility that the substantially square large cooking utensil is displaced from the predetermined position. On the other hand, even if the cooking utensils are not detected by at least three corner proximity sensors, if the temperature difference between the detection temperatures of the temperature sensors provided in each heating unit is less than a predetermined threshold value, the heating range of each heating unit is possible. It is considered that there is a large cooking utensil in the room. In such a state of deviation, cooking can proceed in any of the heating parts, but the progress state of cooking differs between the heating part having a small deviation and the heating part having a large deviation. Therefore, by continuing the cooking with the heating amount of all the heating parts reduced until the large cooking utensil is returned to the predetermined position within the predetermined resetting determination time, the cooking time is not delayed. , The variation in the cooking finish is suppressed.
On the other hand, if the number of corner proximity sensors detecting cooking utensils is two or less during cooking, and the temperature difference between the detected temperatures of the temperature sensors of each heating unit is equal to or greater than a predetermined threshold. There is a high possibility that the large cooking utensil is out of the heatable range of the heating part. Therefore, if cooking is continued, it is considered that there is a large difference in the progress of cooking between the heating portion having a small deviation and the heating portion having a large deviation. Therefore, by stopping the heating of all the heating parts until the large cooking utensil is returned to the predetermined position within the predetermined reset determination time, the variation in the cooking finish in each heating part can be suppressed.

Preferably, in the above cooking device,
The heating control means prohibits heating in all the heating portions at the start of cooking in the large cooking mode unless the cooking utensils are detected by at least three corner portion proximity sensors.

According to the above-mentioned cooking utensil, when cooking using a large cooking utensil having a substantially square shape, which is a dedicated cooking utensil, if the cooking utensil is not detected by at least three corner proximity sensors, all the heating parts are used. Since the heating of the cooking utensil is prohibited, it is possible to reliably prevent the cooking from being started in a state where the large cooking utensil is partially heated.

As described above, according to the present invention, when cooking with a large cooking utensil spanned over a plurality of heating portions, a dedicated substantially square large cooking utensil is used and at least three corner portions are close to each other. Since the sensor detects the presence or absence of a large cooking utensil, it is possible to reliably determine the deviation of the large cooking utensil from a predetermined position. As a result, it is possible to prevent the start and continuation of cooking in a state where the large cooking utensil is displaced. Therefore, according to the present invention, since it is possible to prevent excess or deficiency of heating on each heating portion, it is possible to provide a cooking cooker having excellent cooking finish and high safety.

FIG. 1 is a schematic plan view showing an example of a cooking cooker according to an embodiment of the present invention. FIG. 2 is a schematic plan view showing an example of a state in which a large cooking utensil is arranged in the cooking utensil according to the embodiment of the present invention, and FIG. 2A is a schematic plan view in which the large cooking utensil is arranged at a predetermined position. (B) indicates a state in which the large cooking utensil is arranged out of the predetermined position. FIG. 3 is a block diagram showing an example of a control circuit of a cooking cooker according to an embodiment of the present invention. FIG. 4 is a flowchart showing an example of a control operation in the cooking cooker according to the embodiment of the present invention.

Hereinafter, the cooking apparatus according to the present embodiment will be specifically described with reference to the drawings.

FIG. 1 is a schematic plan view showing an example of a cooking cooker of the present embodiment applied to an induction cooking cooker. As shown in FIG. 1, this induction heating cooker has a top plate 2 and left and right heating coils 30 and 31 for heating a cooking pot, a frying pan, etc. by electromagnetic induction as a heating unit below the top plate 2. Be prepared. These heating coils 30 and 31 are housed in a box-shaped main body case that opens upward (not shown) with a predetermined distance in the left-right direction, and the opening of the main body case is closed by the top plate 2. ing. As the heating unit, a stove burner or a heating heater may be used, or different types of heating units may be combined. Further, three or more heating units may be provided. In the present specification, the front side of the top plate 2 in which the user is located is referred to as the front side, the back side is referred to as the rear side, the direction orthogonal to the width direction in the front-rear direction is referred to as the left-right direction, and the height direction is in the front-back direction. The direction perpendicular to each other is called the vertical direction.

The heating coils 30 and 31 are configured so that heating can be controlled independently, and the heating coils 30 and 31 can be simultaneously heated and controlled while a dedicated large cooking utensil is bridged over the left and right heating coils 30 and 31. It is configured. In the present embodiment, when the heating coils 30 and 31 are used alone, the maximum heating amount of the heating coil 30 is set to be larger than that of the heating coil 31, but a dedicated large cooking utensil is used. If so, the maximum heating amount of the heating coil 30 is limited to be the same as the maximum heating amount of the heating coil 31.

The top plate 2 is made of heat-resistant tempered glass. On the top plate 2, circular individual mounting display units 20 and 21 for mounting pots and the like when the heating coils 30 and 31 are used independently, and large cooking utensils are mounted on the top plate 2. A substantially rectangular large-sized mounting display unit 24 having substantially the same size as the bottom surface of the large-sized cooking utensil is described. Further, in front of the top plate 2, the operation units 60 and 61 and the display units 70 and 71 when the heating coils 30 and 31 are used alone for cooking, and the case where the large cooking utensils are used for cooking. The operation unit 66 and the display unit 72 of the above are provided.

The operating units 60 and 61 have heating switches (individual cooking mode setting units) 62 and 64 for starting cooking when the heating coils 30 and 31 are used independently, and heating amounts of the heating coils 30 and 31. Individual heating amount change switches 63 and 65 are provided, and the operation unit 66 includes a heating switch (large cooking mode setting unit) 67 for heating and cooking using a large cooking utensil and heating. A synchronous heating amount change switch 68 for synchronizing and changing the heating amount of the coils 30 and 31 is provided. The heating amount level and warning are displayed on the display units 70, 71, and 72.

Corner portion proximity sensors 8a, 8b, and 8c are arranged so as to come into contact with the top plate 2 on the back surfaces of the top plate 2 near the three corner portions of the large mounting display portion 24, respectively. The detection signals of the corner proximity sensors 8a, 8b, and 8c are output to the control device C, which will be described later.

As the corner proximity sensors 8a, 8b, 8c, for example, a magnetic sensitive switch (Kintetsu switch) for detecting the proximity of a magnetic material, a reflective non-contact infrared sensor, an optical sensor, a capacitance type proximity sensor, or the like is used. .. Among these, a magnetic sensitive switch is preferable because the shape and color of the cooking utensil are not limited and the responsiveness to a large iron cooking utensil is excellent.

Contact-type temperature sensors 40, 41 such as a thermistor are arranged on the back surface of the top plate 2 near the center of the individual mounting display units 20 and 21 so as to come into contact with the back surface of the top plate 2. The detection signals of these temperature sensors 40 and 41 are output to the control device C.

FIG. 2 is a schematic plan view showing a state in which the cooking plate 4 is placed on the top plate 2, and FIG. 2A shows the cooking plate 4 appropriately placed on the large-sized mounting display 24 at a predetermined position. In the state where the cooking plate 4 is placed, the cooking plate 4 is displaced from the predetermined position in (b). The large cooking utensil of the present embodiment is made of iron and is composed of a substantially rectangular cooking plate 4. When the cooking plate 4 is an induction heating cooker, the cooking plate 4 is not particularly limited as long as it is a magnetic material, and may be made of stainless steel, for example. Further, in the case of a cooking cooker having a stove burner as a heating unit, it may be made of other metal such as copper, in addition to iron.

The lengths of the long side and the short side of the cooking plate 4 are left so that the left and right heating coils 30 and 31 are completely covered by the cooking plate 4 when the cooking plate 4 is placed on the top plate 2, respectively. It is set longer than the distance from the left end of the heating coil 30 to the right end of the right heating coil 31, and longer than the distance between the front and rear ends of the heating coils 30 and 31. The cooking plate 4 may have a substantially square shape having substantially the same long and short sides as long as the corner portion proximity sensors 8a, 8b, and 8c can detect the presence or absence of the upper cooking utensil. .. Further, the corner portion may be formed in the corner R portion having a predetermined radius, or may be cut out.

As shown in FIG. 2A, when the cooking plate 4 is properly arranged, the cooking utensils are detected by all the corner proximity sensors 8a, 8b, 8c. On the other hand, as shown in FIG. 2B, when the substantially rectangular cooking plate 4 is arranged so as to be displaced from a predetermined position, the cooking plate 4 is separated from at least one corner portion proximity sensor 8a. The cooking utensils are not detected. In particular, if the corner portion proximity sensors 8a, 8b, and 8c are provided at positions corresponding to the corner portions, which are the corners of a substantially square large cooking utensil, the cooking utensils will not be detected even with a slight deviation, so cooking can be performed early. The deviation of the plate 4 can be determined. Therefore, when the substantially rectangular cooking plate 4 is used, a corner portion proximity sensor is provided below the top plate 2 corresponding to at least three corner portions, preferably four corner portions, and the cooking utensil is detected by these. For example, it can be determined that the dedicated cooking plate 4 is arranged at a predetermined position. As a result, it is possible to prevent the start of cooking in a state where the cooking plate 4 is displaced and the continuation of cooking when the cooking plate 4 is displaced during cooking.

Although not shown, an intermediate proximity sensor for detecting the presence or absence of an upper cooking utensil is arranged on the back surface of the intermediate portion of the long side of the large mounting display portion 24 of the top plate 2 so as to contact the top plate 2. You may let me. In this way, by providing not only the corner portion proximity sensors 8a, 8b, and 8c but also the intermediate portion proximity sensor, it is possible to more accurately detect the deviation of the large cooking utensil. Further, if cooking utensils are installed on the heating coils 30 and 31, respectively, and the heating switch 67 is mistakenly operated when cooking independently, each cooking utensil is detected by the corner proximity sensors 8a, 8b, and 8c. However, since the cooking utensil above is not detected by the intermediate portion proximity sensor, it is possible to prevent erroneous detection when the cooking mode is set incorrectly or when an unused cooking utensil is placed on the top plate 2.

As shown in FIG. 3, the control device C of the induction heating cooker of the present embodiment includes the corner portion proximity sensors 8a, 8b, 8c, heating coils 30, 31, temperature sensors 40, 41, and a heating switch 62. 64, 67, heating amount change switches 63, 65, 68, display units 70, 71, 72 and the like are connected. Although not shown, the control device C includes a microcomputer including a CPU, ROM, RAM, timer, etc., and storing a control program. Further, as a functional configuration, when the heating switch 67 is operated, the control device C of the cooking utensils on the proximity sensors 8a, 8b, 8c based on the detection signals of the corner proximity sensors 8a, 8b, 8c. The cooking utensil determination unit 90 for determining the presence / absence, the temperature determination unit 91 for determining the temperature of the cooking utensil based on the detection signals of the temperature sensors 40 and 41, and the heating control unit 92 for controlling the heating amount of the heating coils 30 and 31. A notification control unit 93 and the like for notifying the abnormality from the display unit 72 when a predetermined abnormality occurs are provided.

FIG. 4 is a flowchart showing an example of a control operation in the case of cooking by using a large cooking utensil with the induction heating cooker of the present embodiment.

When the user turns on the power switch (not shown), the induction heating cooker goes into a standby state, and then when the user turns on the heating switch 67 in the operation unit 66 to perform cooking using a large cooking utensil, The presence / absence of cooking utensils is determined by the proximity sensors 8a, 8b, and 8c at each corner (steps ST1 to ST3). When the cooking utensils are detected by all the corner proximity sensors 8a, 8b, and 8c, the heating amounts of the heating coils 30 and 31 are synchronously controlled according to the setting of the synchronous heating amount change switch 68, and the cooking starts. (Steps ST4 to ST5).

On the other hand, when the cooking utensil is not detected by any of the corner proximity sensors 8a, 8b, and 8c (No in step ST4), the timer is started and the cooking plate 4 is not started to heat the heating coils 30 and 31. The display unit 72 is blinked to notify the warning (step ST6) so that the user can recognize that the cooking plate 4 is not placed or the cooking plate 4 is misaligned. Then, if the cooking utensils are not detected by all the corner proximity sensors 8a, 8b, 8c by the time when the reset determination time (for example, 1 minute) elapses (Yes in step ST7), the state returns to the standby state (Yes). Step ST1). As a result, it is possible to prevent the start of cooking in a state where the cooking plate 4 is not placed and a different cooking utensil is placed or the cooking plate 4 is displaced.

When cooking starts, the detection of the cooking utensil by the corner proximity sensors 8a, 8b, 8c is continued, and the cooking utensil is not detected by any of the corner proximity sensors 8a, 8b, 8c during cooking (cooking). Similarly, in step ST8, No), the timer is started, and the display unit 72 is made to blink to notify the warning (step ST9).

Next, it is determined whether or not the temperature difference between the detected temperatures of the temperature sensors 40 and 41 is less than a predetermined threshold value (for example, 10 ° C.) (step ST10). That is, if the cooking plate 4 is displaced within the heatable range of the heating coil 31, heating to some extent is possible, so that the temperature difference between the temperature detected by the temperature sensor 40 and the temperature detected by the temperature sensor 41 is small. .. On the other hand, when the deviation of the cooking plate 4 from the predetermined position becomes large, the temperature difference between these detected temperatures becomes large. As a result, the progress of cooking on the cooking plate 4 on the heating coil 30 may differ from that on the heating coil 31. Therefore, if the temperature difference between the detection temperatures is less than a predetermined threshold value, the heating amount of the heating coils 30 and 31 is reduced to the minimum heating amount until the resetting determination time (for example, 1 minute) elapses (step). ST11-12). As a result, variations in the cooking finish can be suppressed while continuing cooking by both heating coils 30 and 31 with a low heating amount. Then, if the cooking utensil is not detected by any of the corner proximity sensors 8a, 8b, and 8c even after the resetting determination time elapses after reducing the heating amount, the temperature difference of the detected temperature is less than the threshold value. Even so, the outputs of all the heating coils 30 and 31 are stopped (step ST13). As a result, higher safety can be ensured.

On the other hand, if the temperature difference between the detected temperatures is equal to or greater than a predetermined threshold value, the outputs of all the heating coils 30 and 31 are stopped until the resetting determination time elapses (steps ST14 to ST15). As a result, variations in the cooking finish on the heating coils 30 and 31 can be suppressed.

If the cooking utensils are detected by all the corner proximity sensors 8a, 8b, 8c before the resetting determination time elapses, the heating amounts of the heating coils 30 and 31 are returned to the original state and the cooking is continued. (Step ST16). As a result, the cooking plate 4 can be continuously heated with an appropriate amount of heating.

As described above, according to the induction heating cooker of the present embodiment, a cooking utensil 4 having a predetermined size and a substantially square shape is used as a cooking utensil for cooking a large amount of food to be cooked at one time. Therefore, the cooking plate 4 can be placed at a predetermined position on the top plate 2 when the cooking plate 4 is laid on the plurality of heating coils 30 and 31 for cooking. Since the position of the substantially square cooking plate 4 is fixed on the top plate 2, the corner portion proximity sensors 8a, 8b, which are provided at lower positions corresponding to at least three corner portions of the top plate 2, If the presence or absence of the cooking plate 4 is detected by 8c, the deviation of the cooking plate 4 from the predetermined position can be detected accurately and surely. As a result, it is possible to prevent the start of cooking and the continuation of cooking in a state where the cooking plate 4 is displaced, so that excess or deficiency of heating of the cooking plate 4 can be prevented, and the cooking plate 4 can be heated evenly. Therefore, according to the induction heating cooker of the present embodiment, the cooking finish and safety can be improved.

(Other embodiments)
(1) In the above embodiment, a substantially square cooking plate is used as a large cooking utensil, but the type of cooking utensil is not particularly limited. For example, it may be a cooking pot having a substantially square bottom surface.
(2) In the above embodiment, a large cooking utensil that spans over two heating portions is used, but a large cooking utensil that spans over three or more heating portions may be used.
(3) In the above embodiment, a top plate on which a large mounting display unit is described is used for mounting a large cooking utensil in a predetermined position, but a protrusion or the like for alignment is provided on the top plate. It may be provided. Further, in the case of a gas stove, a predetermined portion of the large cooking utensil may be held by the trivet so that the large cooking utensil is placed in a predetermined position.

2 Top plate 8a, 8b, 8c Corner part proximity sensor 30,31 Heating coil (heating part)
40,41 temperature sensor

Claims (2)

A top plate and a plurality of heating portions arranged at a predetermined distance from each other are provided, and a large cooking utensil having a predetermined size and a substantially square shape is laid over the plurality of heating portions for heating. A possible cooker,
Each heating part is composed of a heating coil.
Large cookware is set to sit in place on the top plate.
A corner sensor that detects the presence or absence of a cooking utensil is located below the top plate corresponding to at least three corners when a large cooking utensil is placed in a predetermined position .
A cooking mode setting means that can set a large cooking mode for cooking using a large cooking utensil,
When the large cooking mode is set by the cooking mode setting means, the cooking utensil determination means for determining whether or not the cooking utensil is detected by the corner sensor and
A heating control means that controls the heating amount of a plurality of heating units,
It has a temperature sensor that detects the temperature of the cooking utensil on each heating unit provided in each heating unit.
In the heating control means, when the number of corner proximity sensors that detect cooking utensils becomes two or less during cooking in the large cooking mode, the temperature difference between the detection temperatures of the temperature sensors of each heating unit is less than a predetermined threshold value. Determine if it is
When the temperature difference between the detection temperatures of the temperature sensors of each heating unit is less than a predetermined threshold value, all the heating units are used until at least three corner proximity sensors detect the cooking utensil within the predetermined resetting determination time. Reduce the amount of heating in
When the temperature difference between the detection temperatures of the temperature sensors of each heating unit is equal to or greater than a predetermined threshold value, all the heating units are used until at least three corner proximity sensors detect the cooking utensil within the predetermined resetting determination time. A cooking device that stops heating in . In the cooking apparatus according to claim 1,
The heating control means is a heating cooker that prohibits heating in all the heating parts at the start of cooking in the large cooking mode unless the cooking utensils are detected by at least three corner part proximity sensors.

Images