JP2006073347A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker capable of carrying out optimum heating control in placing and heating a heated object on a top plate. <P>SOLUTION: This cooker is provided with a temperature detecting means 25 to detect the temperature of the heated object 22, a weight detecting means 28 installed so as to pre-pressurize and support upward the top plate 23 under the top plate 23 for the heated object 22 to be placed, an operating means 30 capable of selecting one cooking menu from a plurality of cooking menus, and a memory means 34 to store a heating sequence of every cooking menu, and in which an output of a heating means 24 is controlled in a plurality of stages based on the stored heating sequence in advance and the information of the temperature detecting means 25 and the weight detecting means 28. By this, at the cooker in which the heated object is placed and heated on the top plate, the optimum heating control can be carried out. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cooking device used in a general household such as an induction cooking device that places an object to be heated on a top board and heats it.

Conventionally, in this type of cooking device, cooking is generally performed by heating control based on temperature information of an object to be heated (see, for example, Patent Document 1).
JP-A-8-14576

  However, in the conventional configuration, since heating control is performed based only on temperature information of the object to be heated, optimal heating control according to the amount of cooking cannot be performed. In addition, although what performs heating control according to the amount of cooking in a microwave oven, a rice cooker, etc. is known, on the composition of the heating cooker in which these means place a thing to be heated on a top plate and heat it. However, it could not be applied immediately and accurate weight detection was not possible.

  The present invention solves the above-described conventional problems, and in a case where an object to be heated is placed on a top board and heated, a heating sequence, temperature information, and accurate weight stored in advance for each cooking menu are provided. An object of the present invention is to provide a cooking device capable of optimal heating control based on information.

  In order to solve the above-described conventional problems, the cooking device of the present invention pre-supports the top plate under the top plate on which the heated object is placed and the temperature detecting means for detecting the temperature of the heated object. Weight detecting means, operating means capable of selecting one cooking menu from a plurality of cooking menus, storage means for storing a heating sequence for each cooking menu, and heating stored in advance for each cooking menu Based on the sequence and the information of the temperature detection means and the weight detection means, the output of the heating means is controlled in a plurality of stages.

  In this way, the object to be heated is placed on the top board and heated, and for each cooking menu, optimum heating control can be performed based on the pre-stored heating sequence, temperature information and accurate weight information. It is.

  The heating cooker according to the present invention can perform optimum heating control in a case where an object to be heated is placed on a top plate and heated.

  1st invention mounts the heating means which heats the to-be-heated object which accommodated the cooking thing, the control means which controls the said heating means, the temperature detection means which detects the temperature of the said to-be-heated object, and a to-be-heated object. Weight detection means provided so as to preload and support the top plate under the top plate to be placed, operation means capable of selecting one cooking menu from a plurality of cooking menus, and storage means for storing a heating sequence for each cooking menu And the control means controls the output of the heating means in a plurality of stages on the basis of the heating sequence stored in advance for each cooking menu and the information of the temperature detection means and the weight detection means. Therefore, in the case where the object to be heated is placed on the top board and heated, the optimum heating control is performed for each cooking menu based on the pre-stored heating sequence, temperature information and accurate weight information. It is those that can.

  According to a second invention, in particular, in the first invention, the weight detection means has a plurality of top plates that are preloaded and supported upward, and obtains the placement position and weight information of the object to be heated. Even if the weight of the object to be heated fluctuates, it can be heated with an appropriate heating power.

  The third invention reduces the self-heating of the weight detection element in the weight detection means by providing the pulse voltage application means for supplying a pulse voltage to the weight detection means, particularly in the first or second invention. It is possible to suppress the variation of the detected weight value due to temperature and perform more accurate weight detection.

  In particular, according to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a calculation unit that outputs a difference value or a differential value of the detected weight value of the weight detection unit, and a heating amount provided on the top plate are provided. Switching operation means, and enabling the operation by the operation means only when the output of the calculation means is a predetermined value, it is possible to prevent the heating sequence from being executed based on an erroneous operation.

  According to a fifth aspect of the invention, in particular, in any one of the first to third aspects of the invention, there is provided an air blowing means for cooling the heating means, and the air temperature is made uniform by the air blowing means and the weight is measured by the weight detecting means. Thus, variation in the detected weight value due to temperature can be suppressed, and more accurate weight detection can be performed.

  In the sixth invention, in particular, in the second invention, when the placement position of the object to be heated is out of the heating zone by a predetermined value or more, unnecessary power consumption is displayed by displaying or notifying that heating is impossible. It can be set as a safer cooking device.

  In a seventh aspect of the invention, in particular, in any one of the first to fifth aspects of the invention, if a weight equal to or greater than the weight of the top plate cannot be detected at the start of cooking, it is determined that the object to be heated is not placed, and heating By displaying or notifying the possibility, a safe cooking device can be obtained.

  In an eighth aspect of the invention, in particular, in any one of the first to fifth aspects of the invention, the initial weight at the start of cooking is stored, and if the difference between the initial weight and the detected weight during heating reaches a predetermined value, cooking is performed. By completing the above, the usability of the cooking device can be improved.

  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 shows a table-type induction heating cooker as a heating cooker according to Embodiment 1 of the present invention.

  As shown in the figure, the heating cooker according to the present embodiment is located below the top plate 23, which heats a case 21 constituting the main body and a heated object (a pan, a cooking container, etc.) 22 containing the food. A heating means 24 comprising a heating coil, a control means 27 for controlling the output of the heating means 24 by an inverter 26, a temperature detection means 25 for detecting the temperature of the heated object 22, and a heated object 22 The weight detecting means 28 provided so as to preload and support the top plate 23 under the top plate 23, the operation means 30 capable of selecting one cooking menu from a plurality of cooking menus, and the heating sequence stored for each cooking menu Storage means 34. And the said control means 27 controls the output of the heating means 24 in several steps based on the heating sequence memorize | stored beforehand and the information of the temperature detection means 25 and the weight detection means 28 for every cooking menu. .

  The temperature detection means 25 includes an infrared detection element 25a that detects infrared rays radiated from the bottom surface of the object to be heated 22, a band pass filter 25b, an amplifier 25c, and a temperature calculation means 25d. It comprises a weight detection element 28a and weight calculation means 28c. Further, the top plate 23 is elastically attached to the case 21 by an elastic body 32, and is preloaded and supported by the weight detection element 28a through a magnetic shield ring 33 of the temperature detection means 25. Therefore, most of the weight of the top plate 23 on which the heated object 22 is placed is received by the weight detection element 28a through the magnetic-shielding ring 33 at one central portion, and prevents the top plate 23 from rattling. . Note that the weight detection elements 28a can be provided not only at one central location but also at multiple locations as required.

  In addition to the selection of the cooking menu, the operation means 30 can perform output and cooking menu setting display.

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

  The user places the object to be heated 22 containing the cooked food in a heating area on the top plate 23 indicated by a picture located on the heating means 24. When the power switch is turned on and a predetermined temperature is set by the switch on the operation means 30, the control means 27 controls the inverter 26 to supply the set power to the heating means 24. When a high frequency current is supplied to the heating means 24 by the inverter 26, an induction magnetic field is emitted from the heating means 24, and the object 22 to be heated on the top plate 23 is induction heated. Due to this induction heating, the temperature of the object to be heated 22 rises, and the food in the object to be heated 22 is cooked.

  In general, there is Stefan-Boltzmann's law that the infrared energy emitted by an object is proportional to the fourth power of the absolute temperature of the object, and the higher the temperature, the higher the energy is emitted as infrared rays. The infrared detecting element 25a outputs a voltage proportional to the received infrared energy, and uses a thermopile or the like that collects pyroelectric elements or thermocouples at one point. For this reason, when the temperature of the object to be heated 22 rises, the infrared radiation intensity from the bottom increases, the amount of infrared energy received by the infrared detection element 25a increases, and the output signal voltage of the infrared detection element 25a increases.

  In addition, since the top plate 23 is made of tempered glass and generally transmits only infrared light having a wavelength of 4 μm or less, the infrared detecting element 25a uses an element having a peak sensitivity at a wavelength of 0.8 to 3 μm, In order to cut off unnecessary infrared rays emitted from the top plate 23, a band pass filter 25b that transmits light of a predetermined band wavelength (for example, 0.8 to 4 μm) is mounted on the light receiving surface of the infrared detecting element 25a. . The temperature calculation means 25 d calculates the temperature of the object to be heated 22 from the output signal voltage of the amplifier 25 c obtained by amplifying the output of the infrared detection element 25 a using the Stefan-Boltzmann equation, and sends it to the control means 27.

  Next, the magnetic shield ring 33 receives the weight of the object to be heated 22 containing the cooked food together with the weight of the top plate 23 and detects it by the weight detection element 28a. The weight detection element 28a uses a capacitance type or strain gauge type detection element, and a bias load is applied upward by a spring to improve the close contact between the top plate 23, the magnetic shield ring 33 and the weight detection element 28a. In addition to reducing backlash, a bending margin (movable width) due to the weight of the object to be heated 22 is provided. This movable width is about 2 to 4% of the total compression amount of the elastic body, for example, 0.2 mm or less. The capacitance change value or the resistance value change of the weight detection element 28a due to the addition of the weight of the object 22 to be heated is input to the weight calculation means 28b, and is converted to the weight value by referring to an approximate expression or previously stored table data. Is then output to the control means 27. And the said control means 27 controls the output of the heating means 24 in several steps based on the heating sequence memorize | stored previously and the information of the temperature detection means 25 and the weight detection means 28 for every cooking menu.

  For example, in the case of the “warming” menu, heating is performed with a high heating power of 1000 W immediately after the start of heating. However, if the temperature of the cooked food becomes high, the heating power is reduced, and hot cooking is performed from 300 W to 450 W. Low heating power is achieved by adjusting the heating power on and off instead of turning it on and off, so cooking with low heat is possible when there is little uneven heating or spilling. In addition, the temperature of the object to be heated 22 is not guided to the temperature detecting element by heat conduction, but the temperature of the object to be heated 22 can be directly detected in a non-contact manner, and an accurate heating load amount can be obtained from the weight value. Since it can be discriminated, the responsiveness is extremely fast, and it is possible to realize subtle heating and cooling necessary for cooking.

  Thus, in this embodiment, the control means 27 outputs the output of the heating means 24 in a plurality of stages based on the heating sequence stored in advance and the information of the temperature detection means 25 and the weight detection means 28 for each cooking menu. Therefore, even when the object to be heated 22 is placed on the top plate 23 and heated, optimum heating control can be performed. That is, it is possible to improve the usability and convenience in cooking by the user by optimally heating the article 22 to be heated from high thermal power to hot fire.

  In the present embodiment, the weight detection element 28a is fixed to the case 21 with a mounting member and detects the total weight of the top plate 23 and the object to be heated 22 via the magnetic shield ring 33. In the case of a type induction heating cooker, since it is a single-mouth type, a weight detection element may be inserted in the leg portion of the case 21 to detect the total weight of the main body weight and the object 22 to be heated. In this case, the lower part of the leg part or the whole may be an elastic body.

  The material of the elastic body 32 may be any material having an operating temperature of −20 ° C. to + 150 ° C., and fluorine rubber or silicone rubber can be used.

  Further, in the present embodiment, a non-magnetic thin metal is used for the electrode of the weight detection element 28a (in the case of the electrostatic capacitance type) so that the heating means 24 does not induce induction heating, or a synthetic eddy current does not occur. A wire mesh-like material with a very low volume resistance is used.

  Further, by providing an element for temperature correction to the weight detection element 28a of the present embodiment, it is possible to suppress the drift of the detected weight value and detect a more accurate weight.

  It goes without saying that a filter circuit for removing hum noise of 50/60 Hz and inductive noise of the inverter 26 of 20 kHz to 40 kHz may be connected to the outputs of the weight detection element 28a and the temperature detection amplifier 25c. Nor. In particular, in the case of a bridge circuit, the S / N ratio can be greatly improved because a minute signal called a difference due to the load of the load cell resistance value is handled by differential amplification.

(Embodiment 2)
FIG. 2 shows a built-in induction heating cooker as a heating cooker according to Embodiment 2 of the present invention.

  As shown in the figure, the cooking device in the present embodiment includes a case 41 constituting the main body, a top plate 43 on which the object to be heated 42 is placed, and a plurality of points (three or more points) on the lower surface of the top plate 43. A plurality of weight detecting means 40 for supporting the top plate 43, an elastic body 39 for holding the top plate 43 on the upper frame 41b of the case 41, a plurality of heating means 44 comprising heating coils positioned below the top plate 43, and the object to be heated A plurality of temperature detection means 45 for detecting the temperature of the object 42, a plurality of control means 46 for controlling the output of the heating means 44, the control means 46, the heating means 44 are cooled, and the inside of the device (case) is measured before weight measurement. 41), a power switch 48 for turning on / off the power, a power display means 49 for displaying on / off of the power switch 48, and an output and cooking menu. Operation to set It comprises means 50, output display means 51 for displaying the cooking menu and output settings, second output display means 52 located in front of the top plate 43, and heating state display means 53 for displaying heating. The

  In the above configuration, when the power switch 48 is operated, the power display means 49 is turned on to display power on / off. Further, when the object 42 to be heated is placed on the heating area of the top plate 43 and the operation means 50 is operated, the output display means 51 is turned on to display the output setting and heating is started. . At the same time, the heating state display means 53 is turned on to display the heating state. Furthermore, heating control is performed according to the temperature value detected by the temperature detection means 45 and the weight value of the article to be heated 42 detected by the weight detection means 40, and automatic cooking is performed using the selected cooking menu. For example, in the case of the “rice cooking” menu, the amount of rice cooking is determined from the weight value of the object to be heated 42 before the start of heating, and each parameter of the rice cooking sequence is determined. Immediately after the start, pre-cooking (dipping process) is performed with a lowering power of about 500 W, and after the rice is sufficiently absorbed with water, the cooking process heats it at a stretch with a high heating power of 2000 W. When the bottom temperature of the object to be heated 42 reaches 130 to 135 ° C., the heating power is reduced to about 1000 W, the boiling is maintained, and the alpha conversion of the rice is promoted. Furthermore, heat insulation is performed when a predetermined time elapses. In this way, low heating power is realized not by turning on and off the heating power but by multi-stage adjustment, so that cooking with less heating unevenness and spilling is possible. Moreover, since the weight detection means 40 can immediately detect if the amount of rice to be kept warm by reducing the amount of rice while keeping warm, it becomes possible to keep warm with the optimum heating power according to the amount of rice.

  As described above, in the present embodiment, the top plate 43 is held on the upper frame 41b by the elastic body 39, and a plurality of points on the lower surface of the top plate 43 are supported, so that the object to be heated 42 is measured according to the principle of the surveying method. Since the position and weight can be calculated, and an accurate amount of heating load can be discriminated, it is possible to realize subtle heating and cooling necessary during cooking.

  Further, the weight detection element of the weight detection means 40 in the present embodiment is electrostatic so that the movable width of the top plate 43 is about 2 to 4% of the total compression amount of the elastic body, for example, 0.2 mm or less. Capacitance type or strain gauge type detection elements are used, and a bias load is applied upward by a spring to improve the close contact between the top plate 43 and the weight detection means 40 and reduce backlash.

  In addition, the air blowing unit 47 of the present embodiment stirs the atmosphere inside the device to make it uniform before measuring the weight of the object to be heated 42 by the weight detection unit 40, and stops the air flow when detecting the weight. The fluctuation of the weight detection element due to the is reduced. In other words, fluctuations in the detected weight value due to temperature are suppressed, and more accurate weight detection can be performed.

(Embodiment 3)
3 and 4 show the strain sensor type weight detection circuit of the heating cooker and the operation timing thereof according to Embodiment 3 of the present invention.

  The heating cooker in the present embodiment includes pulse voltage application means for supplying a pulse voltage to the weight detection means, so that self-heating of the weight detection element in the weight detection means can be reduced, and detection by temperature The variation of the weight value is suppressed, and more accurate weight detection can be performed.

  In FIG. 3, a pulse waveform is output from the oscillation circuit 61. Based on this waveform, the pulse voltage applying means 62 converts the DC power supply voltage Vcc to a pulse voltage and supplies it to the weight detection means, that is, the bridge circuit 63 comprising a strain gauge. Like to do.

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

  First, when measuring the weight, a pulse waveform having a predetermined period shown in FIG. 4A is output from the oscillation circuit 61, and the switching element in the pulse voltage applying means 62 is turned on / off according to this pulse waveform. The DC power supply voltage Vcc is converted into a pulse voltage and supplied to a bridge circuit 63 comprising strain gauges 63a to 63d and temperature sensitive resistors 64a and 64b. The on-time of the pulse may be the time required to convert the weight value into a digital value, that is, the length of the AD conversion time, and may be about 50 ms from one cycle (about 20 ms) to about 100 ms. The off time is eight times or more of the on time in order to reduce the self-heating of the strain gauges 63a to 63d. In addition, as for the start timing of AD conversion, the strain gauges 63a to 63d start self-heating by applying a pulse voltage, and the output starts to slightly increase as shown in FIG. Since it exhibits the same behavior as a so-called heating element, it stabilizes when the amount of heat generation and the amount of heat release antagonize after a few hours, and thereafter only small fluctuations occur. Therefore, as shown in FIG. Perform at a fixed timing synchronized / delayed with the rising edge. Moreover, the temperature sensitive resistors 64a and 64b perform the action of reducing the temperature drift of the strain gauges 63a to 63d.

  As described above, in the present embodiment, a pulse voltage is applied to the bridge circuit 63 (weight detection means) by the pulse voltage application means 62 so that the self-heating of the weight detection element of the bridge circuit 63 does not occur. By applying, it is possible to eliminate the influence of the output drift of the strain gauges 63a to 63d (weight detection element) due to self-heating, so that the performance of the weight detection element can be sufficiently extracted, and more accurate weight detection can be performed. Can be done.

(Embodiment 4)
FIG. 5 shows a cooking device according to Embodiment 4 of the present invention. The same elements as those of the second embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in the figure, the outputs from the weight detecting means 71 and 72 (three points not shown) are outputted by calculating the differential value by the second calculating means 74. The second operation means 75 complements the operation means 50 provided on the front surface of the case 41, and at least three types of touch keys of “heating on / off”, “up”, and “down” are provided on the top plate 43. It is provided and configured. The inverter 47 includes a heating unit 44, a resonance capacitor 76, and a power switching element 77, and an AC voltage is supplied from a commercial power supply 80 through a smoothing capacitor 78 and a rectifier diode 79.

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

  As in the second embodiment, when the power switch is operated, the power display means is turned on to display power on / off. Further, when the object to be heated 42 containing the food is placed on the heating area of the top plate 43 and the “heating on / off” key of the second operation means 75 is pressed, the output display means and the second output display are displayed. The means is turned on to display the output setting and heating is started. Further, the heating is controlled according to the temperature value detected by the temperature detecting means 45 and the weight value of the object to be heated 42 detected by the weight detecting means 71 and 72, and cooking by the selected cooking menu is performed. Next, when the “heating on / off” key of the second operating means 75 is pressed again, heating is stopped and the display is turned off.

  Here, the second calculation means 74 inputs the detected weight value from the weight detection means 71 and 72 and calculates the differential value. The output value is pushed by the user from the second operation means 75. If the load value is due to the operating force, the control means 46 accepts the key input of the second operating means 75 as valid. On the other hand, if the output value of the second computing means 74 is smaller than the load value due to the operating force that pressed the second operating means 75, it is determined that no operation has been performed and the input from the second operating means 75 is accepted. Absent.

  As described above, in the present embodiment, the second operation means 75 on the top plate 43 is displayed by the user by the second calculation means 74 that outputs the differential value of the weight values detected by the weight detection means 71 and 72. Since the input from the second operation means 75 is not accepted when the pressed operation force is not detected, an accurate key input means can be realized.

  Further, the second calculation means 75 in the present embodiment may be a difference value or a differential value of the detected weight value, and when the capacitive touch key is wet or covered with the paper of the optical touch switch. Malfunctions can be prevented.

(Embodiment 5)
FIG. 6 shows a cooking device according to Embodiment 5 of the present invention. The same elements as those in the second and fourth embodiments are denoted by the same reference numerals and description thereof is omitted.

  In the figure, the outputs from the weight detecting means 71 and 72 are outputted by calculating the position and weight of the object to be heated 42 on the top plate 43 by the weight calculating means 81. The storage means 82 stores the position of the heating zone (region) indicated by the symbol on the top 3.

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

  Power on / off, display, etc. are performed in the same manner as in the second and fourth embodiments. Here, when the heated object 42 containing the food is placed on the heating area of the top plate 43, the position of the heated object 42 calculated by the weight calculating means 81 is within the heating area stored by the storage means 82. If this is the case, heating is started, but when the placement position of the article to be heated 42 deviates from the heating region by a predetermined value or more, the user is informed that heating is not possible and heating is not performed.

  As described above, in the present embodiment, heating is performed when the user does not correctly place the object to be heated 42 in the heating area based on the position information of the object to be heated 42 output from the weight calculation unit 81. Since this is not performed, an extremely safe cooking device can be realized.

  Further, the storage means 82 of the present embodiment includes only the object to be heated 42 based on the weight of the object to be heated 42 detected by the weight detection means 71 and 72 (three points not shown) and the weight of the top plate 43. In order to calculate the weight of the top plate 43, the weight of the top plate 43 is stored in advance. Therefore, if the weight more than the weight of the top plate 43 cannot be detected at the start of cooking, control is performed if the object to be heated 42 is not placed. The determination is made by the means 46, and it is possible to display or notify the user that heating is impossible. Further, when the weight more than the weight of the top plate 43 cannot be detected, it is possible to prohibit the input of the heating start key or the switch.

  Moreover, since the weight detection means 71 and 72 of this Embodiment can always detect the weight of the to-be-heated material 42, it memorize | stores the initial weight of the to-be-heated material 42 at the time of a cooking start, and detects during heating When the difference between the weight and the initial weight becomes a predetermined value or less, cooking is completed, and automatic cooking is performed, and automatic cooking that keeps the heat retaining power for a certain time can be performed. That is, it is possible to prevent water from running out of water and emptying.

  The configuration shown in each of the above-described first to fifth embodiments can be appropriately combined as necessary, and is not limited to the configuration itself of the embodiment.

  As described above, the heating cooker according to the present invention heats an object to be heated on a top plate, and can perform optimum heating control. Applicable to cooker.

The block diagram of the heating cooker in Embodiment 1 of this invention The disassembled perspective view of the heating cooker in Embodiment 2 of this invention The circuit diagram of the weight detection means of the heating cooker in Embodiment 3 of this invention Operation timing chart of the same weight detection means The block diagram of the heating cooker in Embodiment 4 of this invention The block diagram of the heating cooker in Embodiment 5 of this invention

Explanation of symbols

22, 42 Object to be heated 23, 43 Top plate 24, 44 Heating means 25, 45 Temperature detecting means 27, 46 Control means 28, 40, 71, 72 Weight detecting means 30, 50, 75 Operating means 32, 39 Elastic body 33 Magnetic shield 34 Storage means 47 Blower means 63 Bridge circuit (weight detection means)
74 Second calculating means 81 Weight calculating means

Claims (8)

A heating means for heating an object to be heated containing cooking food, a control means for controlling the heating means, a temperature detecting means for detecting the temperature of the object to be heated, and a top plate on which the object to be heated is placed Weight control means provided so as to preload and support the top plate, operation means capable of selecting one cooking menu from a plurality of cooking menus, and storage means for storing a heating sequence for each cooking menu, the control The means is a cooking device in which for each cooking menu, the output of the heating means is controlled in a plurality of stages based on the pre-stored heating sequence and information on the temperature detecting means and the weight detecting means. 2. The cooking device according to claim 1, wherein the weight detection means has a plurality of top plates that are pre-supported upward so as to obtain the placement position and weight information of the object to be heated. The cooking device according to claim 1 or 2, further comprising pulse voltage application means for supplying a pulse voltage to the weight detection means. Computation means for outputting a difference value or differential value of the detected weight value of the weight detection means, and operation means for switching the heating amount provided on the top plate, and only when the output of the computation means is a predetermined value The cooking device according to any one of claims 1 to 3, wherein operation is possible. The cooking device according to any one of claims 1 to 3, further comprising a blowing unit that cools the heating unit, wherein the air temperature is made uniform by the blowing unit and the weight is measured by the weight detection unit. The heating cooker according to claim 2, wherein when the placement position of the object to be heated is out of the heating zone by a predetermined value or more, the heating inability is displayed or notified. The cooking according to any one of claims 1 to 5, wherein when a weight equal to or more than the weight of the top board cannot be detected at the start of cooking, it is determined that an object to be heated is not placed, and heating is displayed or notified. vessel. The cooking device according to any one of claims 1 to 5, wherein an initial weight at the start of cooking is stored, and cooking is completed when a difference between the initial weight and a detected weight during heating reaches a predetermined value.

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