JP2019216012A - Heating cooker - Google Patents

Abstract

To provide a heating cooker that detects the weights of a plurality of objects to be heated, detects changes in weights of the objects to be heated during heating, and estimates a heated state of each of the objects to be heated.SOLUTION: A heating cooker comprises: a top plate 3 on which objects to be heated can be placed; weight detection units 7 that detect the weights of the objects to be heated; and a distributed weight detection unit that detects a distributed weight ratio in which the objects to be heated load from respective weight values detected by the plurality of weight detection units when the objects to be heated are placed. For the plurality of objects to be heated stepwisely placed on the top plate, the weight detection units and the distributed weight detection unit can detect an initial weight value of each of the objects to be heated and the distributed weight ratio of each of the objects to be heated at the same time that each of the objects to be heated are placed on the top plate, calculate a weight value of each of the objects to be heated from the weight values detected by the weight detection units and the distributed weight ratio of each of the objects to be heated, and continuously detect the weight values of the objects to be heated changing due to heating after the start of the heating. The weight detection units are arranged in a number equal to or more than the set number in which changes in weights of the objects to be heated can be simultaneously detected.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooking device used in general households, restaurants and offices.

  2. Description of the Related Art In recent years, a heating cooker that is incorporated in a system kitchen or the like and heats a cooking container such as a pot or a frying pan has been widely used. Examples of the heating cooker incorporated in the system kitchen include an induction heating cooker that performs induction heating using an induction heating coil, a gas heating cooker that uses direct heat of gas, and a heater heating cooker that uses an electric heater to heat.

  With respect to this induction heating cooker, an invention that detects the weight and the position information of the object to be heated in order to perform optimal heating control of the object to be heated is disclosed (for example, see Patent Documents 1 and 2). ). Patent Literature 1 includes a weight detection unit that detects the weight of an object to be heated placed on a top plate, calculates a center of gravity position and a weight value of the object to be heated from the values detected by the weight detection unit, and calculates an object to be heated. When the position of the center of gravity changes, if the weight value does not substantially change, the spill-over determination unit that determines that the spill has occurred is provided. In addition, Patent Document 2 includes an induction heating coil that is disposed substantially uniformly below the top plate, and a weight detection unit that detects the weight of the object to be heated placed on the top plate. A control unit is provided for determining the placement position of the center of gravity of the object to be heated based on the calculated value and driving an induction heating coil disposed within a predetermined range from the position of the center of gravity.

JP 2013-72637 A Japanese Patent No. 5404826

  However, in the configuration disclosed in Patent Literature 1, it is possible to determine the spill over only one object to be heated. For example, when two objects to be heated (here, objects to be spilled) can be heated by two induction heating coils, the weight detection unit calculates the weight value of the two objects to be heated and the position of the center of gravity. When one of the two objects to be heated is spilled over, the center of gravity of the two objects to be heated changes, and the weight of the two objects to be heated hardly changes. Is determined to have occurred, but it is not possible to determine which of the objects to be heated has caused the overflow.

  Further, in the configuration disclosed in Patent Document 2, for the object to be heated on which the top plate is mounted first, the weight and the position of the center of gravity are detected and the corresponding optimal induction heating coil is driven. It does not disclose that when an object to be heated is placed on a top plate, the weight and the position of the center of gravity of the object to be heated are detected to drive an optimal induction heating coil. That is, also in this case, the object to be controlled is one object to be heated.

  As described above, in the conventional configuration, it is possible to detect and control the weight of the object to be heated by only one object to be heated, and to control a plurality of objects to be heated simultaneously. There was a problem that it was difficult.

The present invention solves the above-described problems, and detects a weight of a plurality of objects to be heated, detects a change in weight of the object to be heated during heating, and performs optimal heating control for each object to be heated. Is provided.

  In order to achieve the above object, the present invention provides a top plate on which one or two or more objects to be heated can be placed, and one top plate arranged with a different center below the top plate. Or two or more induction heating coils, an inverter for supplying high-frequency power to the induction heating coils, control means for controlling the output of the inverter, and at least two places below the top plate, the top plate A weight detection unit that supports the body itself or the entire body including the top plate, and detects the weight of the object to be heated placed on the top plate; and the heating unit that is placed on the top plate. When an object is placed, a distributed load detection unit that detects a distributed load ratio applied to the object to be heated by each of the weight values detected by the plurality of weight detection units, When the first object to be heated is placed on the top plate, the first object to be heated is determined based on the first weight value detected by the plurality of weight detectors and the first weight value. A first step of detecting a first distributed load ratio to be loaded, and, after placing the first heated object, when a second heated object is placed on the top plate, A second weight value received from the second object to be heated is detected based on a difference between the weight value detected by the weight detection unit and a first weight value that is a preceding stage, and a second weight value received from the second weight value is determined based on the second weight value. 2) a second stage of detecting a second distributed load ratio applied to the object to be heated, and thereafter, the weight values and the distributed load ratios of the object to be heated placed on the top plate in a stepwise manner are made the same. Each of the plurality of objects to be heated are simultaneously changed by induction heating the plurality of objects to be heated. The amount is calculated from each weight value applied to the weight detection unit and each of the distributed load ratios applied to the object to be heated, and the weight detection unit is capable of simultaneously detecting a change in weight of the object to be heated. They are arranged at least equal to the number.

  According to the present invention, a plurality of objects to be heated stacked stepwise on the top plate, the weight detection unit, and the distributed load detection unit simultaneously with the loading of each object to be heated, the initial of each object to be heated The weight value and the distributed load ratio of each heated object are detected, and each weight value of each heated object can be calculated from each weight value of the weight detection unit and the distributed load ratio of each heated object. Thereafter, the weight value of each object to be heated, which is changed by heating, can be continuously detected.

  By detecting the change in weight of each object to be heated, it is possible to determine whether or not each object to be fired, for example, a state where the fire has passed to the center of the object to be heated. It is possible to assist in judging the state of each of the objects to be heated as if they were on fire.

Sectional drawing which shows schematic structure of the cooking device in the 1st Embodiment of this invention. Front view of the cooking device The perspective view which showed the state of the unit which assembled the weight detection means in the cooking device. Top view of the cooking device with the top part removed Plan view showing the state of the cooking device at the start of weighing and an enlarged view of the display unit Plan view showing the state when the first object to be heated is placed on the cooking device, and an enlarged view of the display unit. Plan view showing the state when a second object to be heated is placed on the cooking device, and an enlarged view of the display unit. Plan view showing the state when a third object to be heated is placed on the cooking device, and an enlarged view of the display unit. FIG. 2 is a plan view showing another heating cooker according to the first embodiment of the present invention. Plan view showing the use state of the other heating cooker and enlarged view of the display unit Plan view showing the use state of the other heating cooker and enlarged view of the display unit Plan view showing the use state of the other heating cooker and enlarged view of the display unit Plan view showing the use state of the other heating cooker and enlarged view of the display unit The perspective view which showed the state which attaches the built-in type heating cooker in 1st Embodiment of this invention. Correlation diagram showing the relationship between the weight ratio of the object to be heated and the center temperature in the second embodiment of the present invention. A plan view showing an operating state of the cooking device according to the second embodiment of the present invention and an enlarged view of a display unit.

  A first invention provides a top plate on which one or two or more objects to be heated can be placed, and one or two disposed at different centers below the top plate. The above induction heating coil, an inverter that supplies high-frequency power to the induction heating coil, a control unit that controls the output of the inverter, and at least two or more locations below the top plate, the top plate itself, or A weight detector that supports the entire body including the top plate, detects the weight of the object to be heated placed on the top plate, and places the object to be heated placed on the top plate. A distributed load detecting unit configured to detect a distributed load ratio applied to the object to be heated based on each of the weight values detected by the plurality of weight detecting units. When the first object to be heated is placed on the first object, the first weight value detected by the plurality of weight detectors and the first object to be loaded based on the first weight value. A first stage of detecting the distributed load ratio of the first heating object, and, after the first heating object is mounted, when the second heating object is mounted on the top plate, the plurality of weight detection units A second weight value received from the second object to be heated is detected from a difference between the detected weight value and a first weight value which is a preceding stage, and a second heated object is detected from the second weight value. A second stage of detecting a second distributed load ratio applied to the object, and thereafter, stepwise by similarly comparing each weight value and each distributed load ratio of the object to be heated placed on the top plate in a stepwise manner. Detecting the weight of each object to be heated, which simultaneously changes by inductively heating the plurality of objects to be heated, Calculated from each weight value to be applied and each of the distributed load ratios applied to the object to be heated, and the weight detector is arranged at least equal to a set number capable of simultaneously detecting a change in weight of the object to be heated. Things.

  With such a configuration, the weight detection unit and the distributed load detection unit load the plurality of objects to be heated stepwise on the top plate at the same time as the loading of each of the objects to be heated. The weight value and the distributed load ratio of each heated object are detected, and each weight value of each heated object can be calculated from each weight value of the weight detection unit and the distributed load ratio of each heated object. Thereafter, the state (weight) of each object to be heated, which is changed by heating, can be continuously detected.

  According to a second aspect of the present invention, in the first aspect, the weight reduction of one or a plurality of objects to be heated placed on a top plate during cooking is determined by a distribution load ratio of each object to be heated. And a function of calculating from the weight value of each weight detection unit and estimating the fire state of each object to be heated from the rate of the weight reduction and reporting the same.

  With such a configuration, by observing the change in the weight of each heated object, it is possible to determine the state of the fire of each heated object, for example, the state that the fire has passed to the center of the heated object, It is possible for the user to assist in judging each fired state of the plurality of objects to be heated.

  According to a third aspect of the present invention, in the first or second aspect, a weight value or a weight change of each of the objects to be heated is placed on one or more objects to be heated placed on the top plate. It is provided with a display unit for notifying the information of the ratio and the position information on the top plate.

  With such a configuration, the user can determine which object to be heated is in what state without hesitation.

  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 cross-sectional view illustrating a schematic configuration of a heating cooker 1 according to the first embodiment of the present invention. FIG. 2 is a front view showing the heating cooker according to the first embodiment of the present invention.

  In FIG. 1, a heating cooker 1 includes a cooking container 2 for storing an object to be cooked and transmitting heat to the object to cook, a top plate 3 on which the cooking container 2 is placed, and a cooking container. A heating means 4 for heating the object to be cooked via the heating means 2, a control means 5 for controlling the heating means 4, a housing 6 having an upper surface formed by the top plate 3 and containing at least the heating means 4 and the control means 5; , A weight detector 7 disposed below the top plate 3 and at four corners of the housing 6. The top plate 3 allows one or two or more cooking containers 2 to be placed. The weight detector 7 supports the top plate 3 itself or the entire main body including the top plate 3 at at least two places below the top plate 3, and the weight of the object to be heated placed on the top plate 3. Is detected.

  In FIG. 2, an operation display means 8 for accepting a user's operation and displaying information from the cooking device 1 is connected to the control means 5 and arranged at a position visible to the user. The display unit 8 includes a selection unit 9 for selecting the type of the object to be heated by the user, a display unit 10 for displaying weight information and the like from the weight detection unit 7, and the like.

  In the present embodiment, the heating means 4 is an induction heating coil 11 that generates a high-frequency magnetic field by supplying a high-frequency current and induction-heats the cooking vessel 2. The induction heating coil 11 is constituted by one or two or more arranged with different centers below the top plate 3. Further, in order to control a high-frequency magnetic field generated from the induction heating coil 11, which is the heating means 4, an inverter for adjusting the frequency and amount of the high-frequency current and a drive control means for controlling its drive are configured in the control means 5. I have. The drive control means controls the drive of the inverter based on the operation by the user via the operation display means 8 and information on the current, voltage, power, etc. of the inverter, and outputs the high-frequency current supplied from the inverter to the induction heating coil 11. It adjusts and changes the electric power for heating the cooking container 2, and is mainly constituted by a microcomputer and its peripheral circuits.

  The weight detection unit 7 uses a weight sensor called a load cell. This load cell has a strain gauge attached to a metal strain body, and the strain gauge expands according to the deflection of the strain body due to a load, and a voltage corresponding to a change in the resistance value of the strain gauge caused by the strain gauge. It is a weight sensor that detects a value and converts it into a weight. The weight sensor is not limited to this, and any component can be used as long as it detects weight, such as a capacitive load sensor.

  FIG. 3 is a perspective view showing a state of the unit in which the weight detecting means is assembled to the cooking device according to the first embodiment of the present invention, and FIG. It is a top view of a state.

As shown in FIG. 3, the weight detection unit 7 includes four weight detection units 71, a weight detection unit 72, a weight detection unit 73, and a weight detection unit 74. The weight detecting section 7 is fixed below the frame section 12 having a substantially U-shaped cross section assembled in a frame shape, and penetrates below the weight detecting section 7 through a hole provided on the bottom surface of the housing 6. The lower support 13 provided as described above is provided. The lower support section 13 is provided with an adjuster section 14 that can adjust the height of the housing 6, and the adjuster section 14 is configured to be installed as a base on which the cooking device 1 is placed. The frame unit 12 and the weight detection unit 7 are arranged so as to fit in the space between the heating unit 4 installed near the center of the inside of the housing 6 and the control unit 5 and the side wall of the housing 6. 7 has a configuration in which a gap is provided so as not to come into contact with its peripheral parts (see FIG. 4). The upper end of the frame portion 12 is provided with an upper end support portion 16 that engages with a receiving portion 15 provided on a side wall of the housing 6. The heating cooker 1, the cooking container 2 placed on the top plate 3, and the object to be heated are all loaded.

  The control means 5 includes a weight value conversion unit for converting each voltage value corresponding to the weight detected by each weight detection unit 7 into a weight value, and a ratio of the weight values detected by each weight detection unit 7. Is provided for calculating a distributed load detection unit (not shown). The distributed load detection unit is a control unit having a function of detecting position information of a load placed on the top plate 3.

Next, an operation for detecting each weight of a plurality of objects to be heated will be described.
FIG. 5 is a plan view showing a state of the heating cooker according to the first embodiment of the present invention at the start of weighing, and an enlarged view of a display unit. FIG. 6 is a plan view illustrating a state where the first object to be heated is placed on the heating cooker according to the first embodiment of the present invention, and an enlarged view of the display unit. FIG. 7 is a plan view showing a state in which a second object to be heated is placed on the heating cooker according to the first embodiment of the present invention, and an enlarged view of a display unit. FIG. 8 is a plan view showing a state where a third object to be heated is placed on the heating cooker according to the first embodiment of the present invention, and an enlarged view of the display unit.

  FIG. 9 is a plan view showing a heating cooker having two heating means according to the first embodiment of the present invention. 10 is a plan view showing a state in which cooking of an object to be heated is first started on the left heating means side in the heating cooker of FIG. 9, and an enlarged view of the display unit. FIG. 11 is a plan view showing a state where cooking of the object to be heated is started from the state of FIG. 10 on the right heating means side, and an enlarged view of the display unit. FIG. 12 is a plan view showing a detection state when two objects to be heated are placed on the left and right heating means in the heating cooker of FIG. 9 and an enlarged view of the display unit. FIG. 13 is a plan view showing a detection state in a case where three or one objects to be heated are placed on the left and right heating means in the heating cooker of FIG. 9, and an enlarged view of the display unit. . FIG. 14 is a perspective view showing a state in which the built-in type heating cooker according to the first embodiment of the present invention is mounted.

  In FIG. 5, when the cooking container 2 is first placed on the top plate 3, the weighing start button of the operation display means 8 is pressed. At this time, the total weight value of the heating cooker 1 and the cooking vessel 2 applied to the weight detection unit 7 is calculated as “0” by the weight value conversion unit of the control unit 5, and “0 (g)” is displayed on the display unit 10. Is displayed.

  Subsequently, when the heating start button is pressed, the induction heating coil 11 is energized to start heating the cooking container 2. Here, when the oil is charged before the object to be heated is put into the cooking container 2, the weight detector 7 detects the weight of the input oil, and the weight converter converts the weight of the oil to the increased weight. The value will be displayed on the display unit 10. Here, when the weighing start button is pressed again, "0" is calculated by the weight value conversion unit, and "0 (g)" is displayed again on the display unit 10. That is, it is in the state of tare.

First, as shown in FIG. 6, the first object to be heated A17 (A (g)) is put into the cooking container 2. At this time, the four weight detectors 7 respectively detect the weight values (A1 (g), A1
2 (g), A3 (g), A4 (g)). At this time, the sum of the weights detected by the weight detection units 7 is the weight (A) of the first heated object A17 (Equation 1).
A1 + A2 + A3 + A4 = A (Equation 1)
At the same time, the distribution load detection unit calculates the ratio of the weight applied to each weight detection unit 7 to the weight (A (g)) of the food A17 (hereinafter, referred to as the distribution load ratio) (Equation 2).
a1 = A1 / A a2 = A2 / A a3 = A3 / A a4 = A4 / A (Equation 2)
This distributed load ratio is a ratio of the distance of the heated object A17 to each of the weight detection units 7. Assuming that the above-mentioned heated object A17 (A (g)) is heated and its weight is reduced to ＊* A, each of the weight detection units 7 has ＊* A1 and ＊*. A2, 1/2 * A3, and 1/2 * A4.

  That is, as long as the position of the heated object A17 is not changed, the distributed load ratio of the heated object A17 is constant, and the weight of the heated object A17 is divided into the respective weight detection units 7 according to the distributed load ratio. After immediately detecting the weight and the position information of the first heated object A17, the position information for the circle indicating the position of the induction heating coil displayed on the display unit 10 is schematically shown in FIG. The number is displayed together with the number, and weight information is displayed next to the number.

Subsequently, when the second object to be heated B18 (B (g)) is placed next to the first object to be heated A17 in the cooking container 2 as shown in FIG. Then, the increment (B1 (g), B2 (g), B3 (g), B4 (g)) with respect to the weight value of the first heated object A17 is detected (Equation 3).
B1 = W1 (net value of weight detector 71) -A1 (Equation 3)
B2 = W2 (net value of weight detector 72) -A2 (Equation 3)
B3 = W3 (net value of weight detector 73) -A3 (Equation 3)
B4 = W4 (net value of weight detector 74) -A4 (Equation 3)
Here, A1, A2, A3, and A4 in (Equation 3) are the weight values of the respective weight detection units 7 of the first heated object A17 at the moment when the second cooked object B18 is input. The sum of B1 (g), B2 (g), B3 (g), and B4 (g) calculated as the weight information of the second heated object B18 is the weight (B ( g)) (Equation 4).
B1 (g) + B2 (g) + B3 (g) + B4 (g) = B (g) (Equation 4)
Then, from the weight value of each of the weight detectors 7, the distributed load detector calculates the distributed load ratio for the second heated object B18 (Equation 5).
b1 = B1 / B b2 = B2 / B b3 = B3 / B b4 = B4 / B (Equation 5)
After immediately detecting the weight and the position information of the second object to be heated B18, the position information and the weight information are displayed together with the first object to be heated as shown in the display section 10 of FIG. . The loads (W1, W2, W3, W4) applied to the respective weight detectors 7 when the two objects to be heated (A17, B18) are thrown in are (Equation 6)
W1 = A1 + B1 W2 = A2 + B2 W3 = A3 + B3 W4 = A4 + B4 (Equation 6)
The load applied to each weight detection unit 7 is represented by the weight value (A (g), B (g)) of each object to be heated and the distribution load ratio (a1 / a2 / a3 / a4, b1). / B2 / b3 / b4), it can be converted as shown in (Equation 7).
W1 = a1 * A + b1 * B (Equation 7)
W2 = a2 * A + b2 * B (Expression 7)
W3 = a3 * A + b3 * B (Expression 7)
W4 = a4 * A + b4 * B (Equation 7)
Further, as shown in FIG. 8, when the third object to be heated C19 (C (g)) is put into the cooking container 2, the same calculation as described above is performed by the following (Equation 8), (Equation 9), (Equation 9). (Equation 10), (Equation 11), (
The weight value and the distribution load ratio of each weight detection unit 7 in the third heated object C19 are calculated as in Expression 12).
C1 = W1 (net value of weight detection unit 71) -A1-B1 (Equation 8)
C2 = W2 (net value of weight detector 72) -A2-B2 (Equation 8)
C3 = W3 (net value of weight detector 73) -A3-B3 (Equation 8)
C4 = W4 (net value of weight detection unit 74) -A4-B4 (Expression 8)
C1 (g) + C2 (g) + C3 (g) + C4 (g) = C (g) (Equation 9)
c1 = C1 / C c2 = C2 / C c3 = C3 / C c4 = C4 / C (Equation 10)
W1 = A1 + B1 + C1 (Equation 11)
W2 = A2 + B2 + C3 (Equation 11)
W3 = A3 + B3 + C3 (Equation 11)
W4 = A4 + B4 + C4 (Equation 11)
W1 = a1 * A + b1 * B + c1 * C (Equation 12)
W2 = a2 * A + b2 * B + c2 * C (Equation 12)
W3 = a3 * A + b3 * B + c3 * C (Equation 12)
W4 = a4 * A + b4 * B + c4 * C (Equation 12)
Then, immediately after detecting the weight and the position information of the third object to be heated C19, as shown in the display unit 10 of FIG. 8, the first and second objects to be heated (A17, B18) are displayed. At the same time, the position information and the weight information are displayed.

  When the three objects to be heated are continuously heated, moisture in the objects to be heated evaporates and the weight decreases. In particular, for meat such as beef and pork, and fish, there is a correlation between the heat shrinkage of muscle protein and the temperature, so that the temperature state inside the heated object can be estimated from the weight reduction ratio.

  Although the weight value of the object to be heated changed during heating could not be detected in the conventional configuration, in the present embodiment, the above-described four relational expressions (Equation 12) are calculated from the simultaneous equations. , The weight values (A, B, C) of three unknown objects to be heated can be derived. In the present embodiment, since four weight detectors 7 are provided, up to four objects to be heated can be simultaneously detected. In order to detect up to six objects to be heated at the same time, if the weight detectors 7 are provided at six or more locations, the weight value of each weight detector 7 as shown in (Equation 12) can be obtained. And the relation between the weight of each object to be heated and the distribution load ratio hold, so that it is possible to calculate from the simultaneous equations.

  In the above-described embodiment, the type is generally referred to as a stationary type, and has one dielectric heating coil. However, as shown in FIG. 9, two dielectric heating coils are provided in a stationary type. The same type of arithmetic configuration can be adopted for the other types. In this case, it is assumed that two induction heating coils are used simultaneously.

For example, a case will be described in which the first induction heating coil is used to cook the first object to be heated and the right induction heating coil is used to cook the second object to be heated.
In the case of this mode, in order to remove the weight value of the cooking container, a measurement start button corresponding to the left and right induction heating coils is provided in the operation unit.

  First, when the cooking vessel M20 is placed on the left side of the induction heating coil on the top plate 3, the left measurement start button of the operation display means 8 is pressed. At this time, the total weight value of the weight of the heating cooker 1 and the cooking container M20 applied to the weight detection unit 7 is calculated to “0” by the weight value conversion unit of the control unit 5, and “0 (g)” is displayed on the display unit 10. Is displayed.

Subsequently, when the heating start button is pressed, the left induction heating coil is energized to start heating the cooking vessel M20. Here, when oil is added before the object to be heated is put into the cooking container M20, if the left measurement start button is pressed again, the weight of the added oil is calculated by the weight value conversion unit, and " 0 (g)] is displayed again. It is in the state of tare.

Subsequently, as shown in FIG. 10, when the first object to be heated D21 (D (g)) is put into the cooking vessel M20, the weight and distribution of the first object to be heated D21 are the same as described above. The load ratio is calculated immediately (Equations 13 and 14).
D1 + D2 + D3 + D4 = D (Expression 13)
d1 = D1 / D d2 = D2 / D d3 = D3 / D d4 = D4 / D (Equation 14)
Next, the cooking vessel N22 (P (g)) is placed on the induction heating coil side on the right side of the top plate 3. At this time, the weight of the cooking vessel N22 increases in the weight detecting section 7. Here, when the right weighing start button of the operation display means 8 is pressed, the increase in the cooking vessel N22 is calculated by the weight calculation of the object to be heated. Is calculated by the weight conversion unit so as to remove from the equation (Equation 15).
D1 = W1 (net value of weight detector 71) -P1 (Equation 15)
D2 = W2 (net value of weight detector 72) -P2 (Equation 15)
D3 = W3 (net value of weight detector 73) -P3 (Equation 15)
D4 = W4 (net value of weight detector 74) -P4 (Equation 15)
Therefore, at this time, only the weight information and the position information of the first heated object D21 corresponding to the left induction heating coil are displayed on the display unit 10, and the display unit 10 on the right induction heating coil side is displayed on the display unit 10. It is not displayed.

Thereafter, when the oil is poured into the right cooking container N22, the weight (R (g)) of the oil is detected by the weight detection unit 7. However, as described above, when the right measurement start button is pressed again, the amount of the injected oil is reduced. The weight (R (g)) is calculated and removed by the weight conversion unit, and no weight information or the like is displayed on the display unit 10 on the right side of the induction heating coil (Equation 16).
D1 = W1 (net value of weight detector 71) -P1-R1 (Equation 16)
D2 = W2 (net value of weight detector 72) -P2-R2 (Equation 16)
D3 = W3 (net value of weight detector 73) -P3-R3 (Equation 16)
D4 = W4 (net value of weight detection unit 74) -P4-R4 (Formula 16)
Here, as shown in FIG. 11, when the second object to be heated E23 (E (g)) is put into the right cooking container N22, the weight detection unit 7 and the distributed load detection unit are as follows. The calculations (Expression 17), (Expression 18), (Expression 19), (Expression 20), and (Expression 21) are performed.
E1 = W1 (net value of weight detector 71) -D1-P1-R1 (Equation 17)
E2 = W2 (net value of weight detector 72) -D2-P2-R2 (Equation 17)
E3 = W3 (net value of weight detector 73) -D3-P3-R3 (Equation 17)
E4 = W4 (net value of weight detection unit 74) -D4-P4-R4 (Equation 17)
E1 (g) + E2 (g) + E3 (g) + E4 (g) = E (g) (Equation 18)
e1 = E1 / E e2 = E2 / E e3 = E3 / E e4 = E4 / E (Equation 19)
W1 = D1 + E1 + P1 + R1 (Equation 20)
W2 = D2 + E2 + P2 + R2 (Equation 20)
W3 = D3 + E3 + P3 + R3 (Equation 20)
W4 = D4 + E4 + P4 + R4 (Equation 20)
W1 = d1 * D + e1 * E + P1 + R1 (Equation 21)
W2 = d2 * D + e2 * E + P2 + R2 (Equation 21)
W3 = d3 * D + e3 * E + P3 + R3 (Equation 21)
W4 = d4 * D + e4 * E + P4 + R4 (Equation 21)
In the above (Equation 21), the unknowns are the weight D (g) of the first heated object D21 and the weight E (g) of the second heated object E23, and the distribution load ratio (d1 / d2 / d3) / D4, e1 /
e2 / e3 / e4), and the distribution load (P1 / P2 / P3 / P4, R1 / R2 / R3 / R4) of the cooking container M20, the cooking container N22 and the oil are already known values that have been initially confirmed. By calculating the simultaneous equations of (Equation 21), the weight D (g) of the first heated object D21 and the weight E (g) of the second heated object E23 can be calculated.

  In the heating cooker having the two induction heating coils, an example in which one heated object is simultaneously cooked in each case has been described. However, as described above, in the present embodiment including the four weight detection units 7, Since the weights of up to four objects to be heated can be calculated at the same time, for example, when two objects to be heated are placed on two induction heating coils, the weight can be calculated similarly, The display unit 10 shows weight information and position information as shown in FIG. Further, when three objects to be heated are placed on one induction heating coil side and one object is placed on the other induction heating coil, as shown in FIG. It notifies the user of the weight information and the position information.

  According to the configuration of the present embodiment, for each of a plurality of objects to be heated, the weight of each of the plurality of objects to be heated is sequentially detected when the objects are put into a cooking container. Since the state of the weight change of the object to be heated is detected and notified to the user together with the position information, the state of each object to be heated can be used as a standard for determining what the state is.

  In the present embodiment, the stationary type configuration that is installed on the kitchen table has been described. However, an opening 24 is provided on the top surface of the kitchen table, and the heating cooker is placed in the opening 24. It is possible to provide the same function in a built-in type in which a.

  In this case, as shown in FIG. 14, a special mounting frame 25 is mounted on the opening 24 of the kitchen table, and the cooking is performed in such a manner that the adjuster 14 of the weight detection unit 7 is placed on the bottom of the mounting frame 25. In this case, the same weight detection can be made to function.

(Embodiment 2)
FIG. 15 is a correlation diagram showing changes in the weight ratio of the object to be heated and changes in the center temperature in the second embodiment of the present invention. FIG. 16 is a plan view showing a state where an object to be heated is placed, and an enlarged view of a display unit in the second embodiment of the present invention. This embodiment has almost the same configuration as that of the first embodiment, and therefore, only the differences will be described.

  The correlation diagram of FIG. 15 shows the correlation of the heated object in a beef steak, and shows the correlation diagram for other livestock meat (pork, chicken, etc.) and cut fish (salmon, cod, etc.). There is. The control unit 5 is provided with an information storage unit, and stores basic correlation data of a change in the weight ratio and a change in the central temperature in each of the meat and fish foods. Here, the weight ratio is a ratio of the weight of the heated object after heating to the initial weight of the heated object before heating. For example, in a beef steak having an initial weight of 150 g, when heated to 135 g, the weight ratio becomes 90%.

Next, an operation of heating and cooking while estimating the center temperature will be described using a beef sirloin steak as an example.
First, when the cooking container 2 is placed on the top plate 3, the measurement start button of the operation display means 8 is pressed. At this time, the total weight value of the weights of the cooking device 1 and the cooking vessel 2 applied to the weight detection unit 7 is calculated to “0” by the weight value conversion unit of the control unit 5, and “0 (g)” is displayed on the display unit 10. Is displayed.

  Subsequently, the selection unit 9 of the operation display unit 8 selects a foodstuff. The selection section 9 has menus of beef, pork, chicken, cod, salmon, and the like, and in this case, selects beef.

  After that, when the heating start button is pressed, the induction heating coil 11 is energized to start heating the cooking container 2. The heating temperature at this time is supplied to the induction heating coil 11 under conditions suitable for setting the temperature optimal for cooking beef. After the start of heating, if the oil is put in the cooking container 2 before putting the object to be heated, the weight detector 7 detects the weight of the put oil, and the weight converter converts the weight of the oil to the increased weight. The value is displayed on the display unit 10. Here, when the weighing start button is pressed again, the weight value conversion unit calculates “0” and the display unit 10 displays “0 (g)” again.

  Subsequently, the beef sirloin steak (A (g)) to be heated is charged into the cooking container 2. The detection of each weight detection unit 7 and the detection of the distribution load ratio are the same as those in the first embodiment, and thus description thereof will be omitted. Immediately after the charging, the display unit 10 displays the state of the object to be heated as “100%” by weight.

  When the object to be heated is heated, the water in the object flows out to the outside by heating, and then the eluted water is heated by evaporating by touching the bottom surface of the cooking vessel 2, so that if the heating is continued, the whole weight gradually decreases. To go. The display unit 10 displays a state in which the weight ratio of the weight / initial weight at that time is decreasing in accordance with the decrease in the heated object.

  When the temperature / weight ratio switching button provided on the operation display means 8 is pressed, the weight ratio of “beef” and the correlation data of the central temperature shown in FIG. The corresponding center temperature is switched and displayed on the display unit 10 as a reference value (see FIG. 16).

  By detecting the water separation phenomenon caused by thermal denaturation of foodstuffs caused by heating as a change in weight in this way, the state of thermal denaturation, that is, the center temperature of the foodstuffs, can be estimated and confirmed until now. It becomes possible to visually determine the condition of the fire inside the food that could not be done.

  As described above, the heating cooker according to the present invention detects the weight information of the plurality of objects to be heated stacked on the top plate individually, and simultaneously detects the weight that changes due to the heating of the object to be heated. By performing the detection, it is possible to determine the fired state of the object to be heated.

DESCRIPTION OF SYMBOLS 1 Heating cooker 3 Top plate 5 Control means 7, 71, 72, 73, 74 Weight detection part 11 Induction heating coil

Claims (3)

One or more top plates on which two or more objects to be heated can be placed;
One or more induction heating coils arranged with different centers below the top plate;
An inverter for supplying high-frequency power to the induction heating coil,
Control means for controlling the output of the inverter;
A weight detector that supports the top plate itself or the entire body including the top plate at at least two places below the top plate, and detects the weight of the object to be heated placed on the top plate. When,
When the object to be heated placed on the top plate is placed, a distributed load detection unit that detects a distributed load ratio applied to the object to be heated by each of the weight values detected by the plurality of weight detection units. And
When the first object to be heated is placed on the top plate, the first object to be heated is loaded based on the first weight value detected by the plurality of weight detectors and the first weight value. A first step of detecting a first distributed load ratio, and a method of detecting a plurality of weights when a second object to be heated is placed on the top plate after the first object to be heated is placed. The second weight value received from the second object to be heated is detected from the difference between the weight value detected by the section and the first weight value that is the preceding stage, and a second weight value received from the second heated object is calculated from the second weight value. A second step of detecting a second distributed load ratio applied to the object to be heated, and thereafter, a step in which each weight value and each distributed load ratio of the object to be heated placed on the top plate in a stepwise manner are similarly set. The weight of each object to be heated, which changes simultaneously by induction heating the plurality of objects to be heated, Each weight value applied to the weight detection unit and each of the distributed load ratios applied to the object to be heated are calculated, and the weight detection unit is equivalent to a set number capable of simultaneously detecting a weight change of the object to be heated. The cooking device arranged above. Placed on the top plate during cooking, one, or the weight loss of each of the plurality of heated objects, calculated from the distribution load ratio of each heated object and the weight value of each weight detection unit, The heating cooker according to claim 1, further comprising a function of estimating a fire state of each of the objects to be heated based on the weight reduction ratio and reporting the estimated state. One display placed on the top plate, or, for a plurality of objects to be heated, the weight value of each of the objects to be heated, or a display unit that notifies the information of the weight change rate and the position information on the top plate. The cooking device according to claim 1, further comprising: