JP2001248840A - Heating cooking system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heating cooking system capable of rapidly and uniformly heating and cooling by detecting a stereoscopic (three-dimensional) temperature distribution of a material to be heated (food) to be an object to be heated, recognizing a stereoscopic shape of the material (food), and controlling to heat with a good efficiency suitable for the stereoscopic shape and temperature distribution. SOLUTION: The heating cooking system heats the material 3 to be heated by a magnetron 6 by placing the material 3 in a heating chamber 2. The system detects temperatures of regions of a heating region in the chamber 2 by dividing the heating region into 16 regions by thermopile modules 10a, 10b, and sequentially stores a plurality of temperature data detected by the modules 10a, 10b in relation to the regions in a memory means 24. Then, the system recognizes the three-dimensional surface temperature distribution or the three-dimensional shape based on a temperature distribution detection result of the heating region outputted from the means 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and cooking apparatus for cooking by controlling the heating of food and the like.

[0002]

2. Description of the Related Art Conventionally, heating control of an object to be heated such as food is performed by detecting a heating state of the object (including non-contact temperature detection by an infrared sensor, etc.) It is known to perform heating control depending on the presence or absence of generated gas.

However, heating chamber temperature detection, steam generation detection,
Gas detection is an indirect measurement method for the heated object,
It was not possible to measure the object to be heated partially or directly. On the other hand, non-contact temperature detection using an infrared sensor is a direct method because the surface temperature of the object to be heated can be directly measured.However, narrowing the focusing area with one sensor requires multiple sensors, When the area is widened, the average temperature of other parts including the object to be heated is detected, so that an accurate temperature of the object to be heated cannot be obtained. Therefore, heating control could not be performed efficiently, and the accuracy of heating or thawing completion detection was low.

In order to solve such a problem, for example, a conventional microwave oven disclosed in Japanese Patent Application Laid-Open No. H11-118156 has been proposed. FIG. 16 is a block diagram showing a functional configuration of the conventional microwave oven. In FIG. 16, when the food 118 is placed on the turntable 103 in the heating chamber 101 and the start switch 108 is operated, the control circuit 107 is activated, and the motor 104 and the heating means 10 are turned on.
2. The heating circuit is started by controlling the storage circuit 110, and the infrared sensor 105 provided in the upper part of the heating chamber 101 receives timings t1, t2, t3 from the timing circuit 109.
.., At t12, a plurality of temperatures of each part of the food 118 are detected.

The detected temperature data at all the timings from time t1 to time t12 is stored in the storage circuit 110 as one frame.
The stored temperature data is supplied to the average temperature detecting device 111, the temperature difference detecting device 112, and the planar shape recognizing device 113, and the planar shape recognizing device 113 performs the planar shape recognizing process and the area calculating process to obtain the food 118. The plane shape and the area are calculated. Thereby, the finishing temperature storage device 1
14, heating power setting device 115, maximum power setting device 11
In order to control the heating means 102 via the heating unit 6, a microwave oven capable of uniformly heating and cooking irrespective of the difference in the initial temperature of food and the size of the food is provided.

[0006]

However, in the above-described configuration of the heating cooking apparatus, since the field of view of the infrared sensor is limited to a state from above the turntable, the surface of the object to be heated is planar (two-dimensional). However, accurate three-dimensional (three-dimensional) temperature distribution information and shape information of the object to be heated cannot be obtained.
Therefore, even with respect to the objects to be heated having different volumes, the heating control is performed on the basis of the planar (two-dimensional) temperature distribution and area taken from above.

The present invention has been made in order to solve such a problem, and detects a three-dimensional (three-dimensional) temperature distribution of an object to be heated (food) to detect the temperature of the object to be heated (food). It is an object of the present invention to obtain a heating cooking device capable of performing quick and uniform heating cooking by recognizing a three-dimensional shape and performing efficient heating control based on the shape and temperature distribution.

When two-stage cooking and one-stage cooking, in which the heating chamber is divided into two, can be selected, the temperature distribution of the object to be heated in each of the upper and lower stages is detected to distinguish the one-stage cooking from the two-stage cooking. It is another object of the present invention to obtain a heating cooking apparatus that performs efficient heating control based on the detected temperature distribution and the detection result of whether the cooking is one-stage cooking or two-stage cooking.

[0009]

SUMMARY OF THE INVENTION The present invention provides a heating means for placing an object to be heated in a heating chamber and heating the heating object, and dividing a heating area heated by the heating means into a plurality of areas to reduce the temperature of each area. A first temperature distribution detecting means for detecting, a second temperature distribution detecting means for dividing a heating area into a plurality of areas at different angles from the first temperature distribution detecting means and detecting a temperature of each area; Storage means for storing a plurality of temperature data detected by the temperature distribution detection means in association with a predetermined area in the divided areas, one after another, based on a temperature distribution detection result of the heating area output from the storage means. Thus, the three-dimensional surface temperature distribution or the three-dimensional shape of the object to be heated is recognized.

Further, according to the present invention, the two temperature distribution detecting means are each constituted by a plurality of thermopiles arranged in a matrix, and the heating area is divided into a plurality of areas in association with the arrangement of the plurality of thermopiles. It is divided.

Further, the present invention provides a heating means for supplying microwaves to an object to be heated placed in a heating chamber via a waveguide and a power supply port, and a plurality of heating areas heated by the heating means. A first temperature distribution detecting means for detecting the temperature of each area, and a second temperature for detecting the temperature of each area by dividing the heating area into a plurality of areas at an angle different from that of the first temperature distribution detecting means. A distribution detecting means for recognizing a three-dimensional surface temperature distribution or a three-dimensional shape of the object to be heated from detection results of the first temperature distribution detecting means and the second temperature distribution detecting means; The opening degree of the power supply port is changed based on a surface temperature distribution or a three-dimensional shape.

Further, the present invention provides a heating means for placing an object to be heated in a heating chamber for heating, a driving means for rotating the object to be heated, and a plurality of heating areas heated by the heating means. First temperature distribution detecting means for detecting the temperature of each area separately; and second temperature distribution detecting the temperature of each area by dividing the heating area into a plurality of areas from a different angle from the first temperature distribution detecting means. Detecting means for recognizing a three-dimensional surface temperature distribution or a three-dimensional shape of the object to be heated from the detection results of the first temperature distribution detecting means and the second temperature distribution detecting means; A control means for controlling the rotation of the object to be heated based on a temperature distribution or a three-dimensional shape is provided.

Further, the present invention provides a heating means for placing an object to be heated in a heating chamber and heating the same, a dividing means which is detachably installed in the heating chamber and divides the heating chamber into two regions,
Two temperature distribution detecting means are provided for each of the divided areas and divide the heating area heated by the heating means into a plurality of areas to detect the temperature of each area. Detecting the surface temperature distribution of the object to be heated placed in each of the regions, and when the sorting means is not installed, the three-dimensional surface temperature distribution of the object to be heated based on the detection results of the two temperature distribution detecting means. Alternatively, it recognizes a three-dimensional shape.

Further, the present invention provides a heating means for placing an object to be heated in a heating chamber and heating the heating object, a separating means which is detachably installed in the heating chamber and divides the heating chamber into two regions,
Two temperature distribution detecting means arranged in each of the divided areas and dividing a heating area heated by the heating means into a plurality of areas and detecting a temperature of each area; It is determined whether or not the sorting means is installed in the heating chamber on the basis of the detection result.

Further, in the present invention, a power supply port for supplying a microwave to the heating chamber is provided for each of the two divided areas.

Further, the present invention provides a heating means for placing an object to be heated in a heating chamber for heating, a driving means for rotating the object to be heated, and a plurality of heating areas heated by the heating means. One or more temperature distribution detecting means for separately detecting the temperature of each area at predetermined intervals, and a plurality of temperature data detected by the temperature distribution detecting means being associated with a predetermined area in the divided areas one by one. Storage means for storing, wherein rotation of the object to be heated is detected based on whether or not a time-series temperature change is equal to or more than a predetermined value based on a detection result from at least one temperature distribution detecting means.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a longitudinal sectional view of a main part of a high-frequency heating device as an example of a heating cooking device according to Embodiment 1 of the present invention, FIG. 2 is an enlarged view of a thermopile unit, and FIG. 3 is a control block of the high-frequency heating device. FIG.

In FIG. 1, reference numeral 1 denotes a high-frequency heating device main body as one embodiment of a heating and cooking device, 2 denotes a heating chamber for heating a heated object 3 such as food, and 4 denotes a turn on which the heated object 3 is placed. The table 4a is a metal rotary plate disposed under the turntable 4 for stirring and changing microwaves, and 5 is a turntable motor for driving the turntable 4 to rotate. 6 is a magnetron that generates microwaves, 7 is a waveguide that serves as a path for microwaves, 8a is an outlet of the waveguide 7, and an upper power supply port provided on the wall of the heating chamber 2;
8b is a lower power supply port. Reference numeral 9 denotes a movable plate provided at the outlet of the waveguide 7, which is movable in the vertical direction by driving a movable plate motor 9a, and changes the opening area of the upper power supply port 8a and the lower power supply port 8b. FIG. 1A shows a state in which both the upper power supply port 8a and the lower power supply port 8b are fully opened.
(B) shows the upper power supply port 8a with a reduced opening area.

Reference numerals 10a and 10b denote thermopile modules serving as temperature distribution detecting means for detecting the temperature distribution of the object 3 to be heated. The thermopile module 10a is disposed on the ceiling surface of the heating chamber 2 so that the condenser lens faces downward. The module 10b is disposed on the wall surface of the heating chamber 2 so that the condenser lens is oriented sideways. A door (not shown) is provided on the front side of the main body 1 so as to be openable and closable, and an input panel for inputting various cooking conditions and a heating start command on an operation panel provided beside the door. (Not shown).

In FIGS. 2 and 3, reference numerals 11Aa to 11Dd denote thermopiles (hereinafter, when referring to an arbitrary thermopile from 11Aa to 11Dd, refer to "Thermopile 1").
1 ". ). Uppercase letters of the first alphabet indicate the order of A, B, C, D from the first row, and lowercase letters of the second alphabet indicate the order of a, b, c, d from the first column, arranged in four rows and four columns Have been. Reference numeral 12 denotes a thermopile unit in which 16 thermopiles 11 are arranged in a 4 × 4 matrix, and 13 denotes a thermopile module which is disposed in front of the thermopile unit 12.
This is a condenser lens that condenses infrared rays radiated from the detection areas 14 a and 10 b on the thermopile unit 12.

On the other hand, 15 is scanning means for selecting an output signal from the thermopile 11 by an address signal described later, and 16 is first amplifying means for amplifying the output signal selected by the scanning means 15 to a predetermined level. 1
Reference numeral 7 denotes a contact-type reference temperature element such as a thermistor disposed close to the cold junction of the thermopile 1. Reference numeral 18 denotes second amplifying means for amplifying an output signal from the reference temperature element 17 to a predetermined level. Reference numeral 19 denotes a differential amplifier for comparing and amplifying the signal amplified by the first amplifier 16 and the output signal amplified by the second amplifier 18 as inputs. Here, the thermopile modules 10a and 10b include the thermopile unit 12, the scanning means 15, the first amplifying means 16, the reference temperature element 17, and the second amplifying means 18, respectively.
The differential amplifying means 19 is wrapped in a can package or the like, and the condenser lens 13 is arranged on the surface of the package.

Reference numeral 20 denotes the scanning means 1 at a predetermined timing.
5, signal output means for outputting address signals of the thermopiles 11Aa to 11Dd; 21 receives output signals from the differential amplifying means 19 of each of the upper and lower thermopile modules 10a and 10b;
a, multiplexer for selecting / switching between a and 10b, 22
A / D conversion means for converting the voltage output of the multiplexer 21 to a digital signal, 23 for temperature data conversion means for converting the digital signal output of the A / D conversion means 22 to temperature data, and 24 for output from the temperature data conversion means 23 The storage means for storing the temperature data to be stored has a storage buffer corresponding to the 16 elements of the thermopile 11.

Reference numeral 25 denotes control means for receiving output signals from the signal output means 20 and the storage means 24, performing arithmetic processing according to the purpose, and controlling the output of the magnetron 6 and the movement of the movable plate 9. Reference numeral 26 denotes a microcomputer (hereinafter, referred to as a "microcomputer") incorporating the signal output means 20, the multiplexer 21, the A / D conversion means 22, the temperature data conversion means 23, the storage means 24, and the control means 25. Reference numeral 27 denotes a driver for controlling the output of the magnetron 6 and the driving of the movable plate motor 9a according to the output result of the control means 25.

Next, referring to FIGS. 1 to 3, the operation of the high-frequency heating apparatus 1 and the object 3 to be heated placed on the turntable 4 will be described.
Will be described. When a power switch (not shown) is turned on, the magnetron 6 is driven, a microwave is transmitted, and the waveguide 7 and the upper and lower feed ports 8a and 8 are turned on.
The heating target 3 is supplied into the heating chamber 2 via the heating member b. At this time, the turntable motor 5 is also driven at the same time, and the object 3 placed on the turntable 4 is heated while rotating together with the turntable 4. At this time, the microwave agitates and changes due to the rotation of the metal rotary plate 4 a provided below the turntable 4 and the object 3. In addition, the position of the object to be heated 3 is sequentially changed by rotation with respect to a standing wave formed in the heating chamber 2 by the microwave. Due to the change in the stirring of the microwaves and the change in the position of the object to be heated 3, the object to be heated 3
Heating unevenness is reduced.

On the other hand, the thermopile module 10a, 1
0b, When the microcomputer 26 is energized, the infrared rays radiated from the detection area 14 are condensed by the condenser lens 13 and received by the thermopile unit 12. The temperature of the thermopile 11 of the thermopile unit 12 changes due to light reception,
The temperature difference between the hot junction and the cold junction of the thermocouple is converted into a voltage and output.

At this time, the scanning means 15 outputs one of the output voltages of the thermopile unit 12, for example, the thermopile 1Aa, according to the output signal output from the signal output means 20.
And outputs the selected voltage to the first amplifying means 16. On the other hand, thermopile unit 12
The reference temperature element 17 arranged near the cold junction detects the ambient temperature, that is, the absolute temperature, and outputs a voltage to the second amplifying means 18. The output voltages amplified by these amplifying means 16 and 18 are compared and amplified by the differential amplifying means 19,
Even if the ambient temperature changes, the temperature of the detected area 14 can be accurately detected as a voltage value.

The voltage compared and amplified by the differential amplifying means 19 is supplied to an A / D converting means 22 built in a microcomputer 26.
And converted into a digital signal. The digital signal is converted into temperature data by the temperature data conversion means 23 and stored in the storage means 14 as temperature data of the thermopile 11Aa. The above operation is performed by the thermopile 11Aa.
Up to 11Dd, thermopile modules 10a, 10d
The temperature data of all the thermopiles 11 can be stored in the storage means 24 by sequentially performing b each 32 times. By providing a plurality of the storage means 24, it is possible to store the temperature data of the thermopile 11 for each time series.

Upon receiving the temperature data stored in the storage means 24 and the address signal data from the signal output means 20, the control means 25 performs arithmetic processing. Hereinafter, the calculation processing will be described with reference to FIGS. FIG. 4 shows thermopile modules 10a and 10b when a glass (water to be heated 3) containing water is placed on the turntable 4.
It is a figure which shows the to-be-detected area 14a, 14b. here,
(A) is a front view showing the detected area of both the thermopile modules 10a and 10b, (b) is a side view showing the detected area of the thermopile module 10a, and (c) shows the detected area of the thermopile module 10b. FIG. In addition, the part shown by the thick line has shown the position of the glass (the thing to be heated 3) containing the present water now.

Here, reference numeral 14a denotes a detected area of the thermopile module 10a, which indicates a group of rows A to D in the 16 areas;
Reference numeral 14b denotes a detected area of the thermopile module 10b, which indicates a group of columns a to d in the 16 areas. Therefore,
The detected area 14a is the bottom of the heating chamber 2 that covers the turntable 4, and the temperature distribution of the heated object 3 placed on the turntable 4 can be detected from above. On the other hand, the detected area 14b serves as a wall of the heating chamber 2 so that the temperature distribution of the heated object 3 placed on the turntable 4 can be detected from the lateral direction.

FIG. 5 shows a thermopile module 1.
The time-series transition of the temperature data detected by the thermopile 11 of 4 × 4 elements of 0a and 10b is shown. Here, time t1 indicates when the turntable 4 starts rotating, time t2 indicates when the turntable 4 rotates 90 degrees, time t3 indicates when rotating 180 degrees, and time t4 indicates when it rotates 270 degrees. That is, the detection timing of the thermopile modules 10a and 10b is set for each quarter turn of the turntable 4. The numbers in the figure indicate each thermopile 1
Reference numeral 1 denotes detected temperature data. In the following description, it is assumed that the temperature of the object 3 to be heated does not rise during one rotation of the turntable 4.

In detecting the temperature distribution of the thermopile module 10a, the position of the object 3 to be heated is
It can be estimated from the temperature data of 1 × 4 × 16 elements. For this estimation, for example, the average temperature of 16 elements of the thermopile 11 is calculated, and it is determined that the temperature of the object to be heated 3 is detected for the element having a deviation from the average temperature by a predetermined value or more (this element is referred to as This is defined as "ignition element."

That is, at time t1, the thermopiles 11Ba, 11Bb,
In row C, 11Ca, 11Cb are the firing elements, and at time t2, the thermopiles 11Ab, 11Ac, 1
1Bb and 11Bc are firing elements, and at time t3, thermopiles 11Bc, 11Bd, 11Cc and 11C
d is a firing element, and at time t4, the thermopiles 11Cb, 11Cc, 11Db, and 11Dc are firing elements. In accordance with the rotation of the turntable 4, the position of the object to be heated 3 sequentially moves from t1 to t4 (during one round of the turntable 4) in conjunction with the movement of the glass shown in FIG. I understand.

Here, when the object to be heated 3 is placed at the center of the turntable 4, there is no change in the ignition element.
When the object to be heated 3 is placed eccentrically on the center of the turntable 4 as shown in 5 or when the object to be heated 3 is not axisymmetric with the center axis of the turntable 4, for example, the plate itself is circular. However, if the food on it is not circular, the firing element changes as the turntable 4 rotates. Although three-dimensional (three-dimensional) information of the object to be heated 3 cannot be obtained only from the thermopile module 10a,
It is possible to obtain planar (two-dimensional) temperature distribution and position information.

On the other hand, since the thermopile module 10b detects the object 3 to be heated from the lateral direction, when the object 3 is closest to the thermopile module 10b (t3).
When the most distant from (t1), the number of firing elements differs,
By calculating the average value by summing the entire temperature data from t1 to t4, the height of the object to be heated 3 can be recognized. In addition, when the ignition elements of the thermopile module 10a and the thermopile module 10b are combined, the two elements have symmetry at times t1 and t3, and time-series temperature data is synchronized by comparing the two ignition elements. Then, it can be confirmed that the same object to be heated 3 is detected. Therefore, the three-dimensional temperature distribution and the shape (three-dimensional shape) of the object to be heated 3 can be recognized by integrating the ignition elements of the thermopile module 10a and the thermopile module 10b.

FIG. 6 is a view showing the detection areas of the thermopile modules 10a and 10b when the flat object 3 to be heated is placed on the turntable 4, and the ignition elements of the thermopile 11 respectively. is there. Since the thermopile module 10a places the object to be heated 3 in its field of view from above, the planar temperature distribution and the shape (two-dimensional shape) of the object to be heated 3 recognized from the firing element are the same as those in the above-described water-filled state. This is almost the same as the case where the glass (heated object 3) is placed on the turntable 4.

On the other hand, when viewed from the lateral direction by the thermopile module 10b, it can be seen that the height of the object to be heated 3 is different from that of the glass containing water, and the height of the object to be heated 3 is short.
Therefore, unlike the case where the planar temperature distribution and the shape (two-dimensional shape) of the object to be heated 3 are detected from above, the temperature distribution of the object to be heated 3 is detected from both directions of the thermopile modules 10a and 10b. It can be seen that the accurate temperature distribution and shape (three-dimensional shape) of the object to be heated 3 can be recognized only when the detection results are integrated.

The above-described three-dimensional temperature distribution and shape (three-dimensional shape) of the object to be heated 3 can be detected by sufficiently detecting the temperature of the object to be heated 3 in the refrigerator or the freezer. When the temperature of the object to be heated 3 is low, or when the temperature is sufficiently higher than the temperature in the heating chamber 2 during cooking, the heating can be performed before the high-frequency heating apparatus 1 cooks. On the other hand, if the food or the like that has just been left indoors is the object to be heated 3, it is set to start the heating and cooking by the high-frequency heating device 1 and after a certain time has elapsed.

In the above description, the temperature distribution of the object to be heated 3 is detected by the thermopile modules 10a and 10b every quarter of the turntable 4, but the temperature distribution of the object to be heated 3 is detected at finer intervals. In this case, the three-dimensional temperature distribution and the shape (three-dimensional shape) of the object to be heated 3 can be more accurately recognized.

Next, the operation of the high-frequency heating device of this embodiment will be described with reference to the flowchart shown in FIG. The user opens the door of the high-frequency heating device 1 (not shown), puts the object to be heated 3 such as frozen food into the heating chamber 2, places the object on the turntable 4, closes the door, and closes the door. By operating a cooking menu button or the like (not shown), a cooking start button is pressed (YES in step S101). When the cooking start button is pressed, the magnetron 6 and the turntable 4 are driven (Step S102). next,
It is measured by a timer whether or not it is the timing of detecting the temperature distribution of the thermopile modules 10a and 10b. If the timing is the detection timing (YES in step S103), the temperature distribution is detected by the thermopile modules 10a and 10b (step S104). Here, if the detection timing is set to, for example, about 3 seconds of a quarter turn of the turntable 4, the temperature distribution of the object to be heated 3 is detected every quarter turn.

The temperature distribution is detected by detecting a thermopile module 10a disposed on the ceiling of the heating chamber 2 and a thermopile module 10a disposed on the wall of the heating chamber 2.
This is performed by detecting the temperature of 4 × 4 = 16 regions including the object 3 to be heated by the thermopiles 11Aa to 11Dd of b. When the temperatures of the 16 areas are stored in the storage means 24, an average temperature of the 16 temperature data and a temperature difference (deviation) from the average temperature are calculated. If the temperature difference is equal to or more than a predetermined value, for example, 5 ° C. or more, it is recognized that the temperature of the object to be heated 3 is detected, and it is determined that the element is a firing element (step S105).

An example of the case where the heating control is performed based on the ignition element will be described below. As shown in FIG. 4A, when the thermopile 11 in the B row in the detection area 14b of the thermopile module 10b is a firing element (YES in step S106), the object 3 to be heated has a vertically long shape. Recognize that there is. In the case of the vertically long shape, since the object to be heated 3 is often a liquid, it is more efficient to supply more microwaves from the lower power supply port 8b. Squeeze the power supply port 8a (Step S10
7).

On the other hand, when the thermopile 11 in row B of the detection area 14b of the thermopile module 10b is not a firing element (NO in step S106), the number of firing elements in the thermopile module 10a and the number of firing elements in the thermopile module 10b are compared. (Step S108).
As a result, if the number of firing elements of the thermopile module 10a is larger (YES in step S108),
Since the object to be heated 3 is larger than a predetermined size, it is more efficient to supply microwaves as a whole, and the upper and lower power supply ports 8a and 8b are released without moving the movable plate 9 (step S10).
9).

If the number of firing elements of the thermopile module 10b is larger (N in step S108).
O) Since the object to be heated 3 has a size equal to or smaller than a predetermined value, it is possible to uniformly irradiate the entire object to be heated 3 by supplying the microwave from above, and thus the movable plate 9 is moved downward to supply power to the lower part. The mouth 8b is squeezed (step S110).

After performing the above-described heating control, it is determined whether a predetermined stop condition is satisfied, for example, the thermopiles 11Aa to 11Dd of the thermopile modules 10a and 10b.
It is determined whether or not the average temperature has reached a predetermined temperature (step S111). If the predetermined stop condition is satisfied, the driving of the magnetron 6 and the turntable 4 is stopped to end the heating cooking (step S112).

In this specification, a thermopile, which is a thermal infrared sensor, has been described in consideration of handling properties such as no need for cooling and cost performance applicable to electric equipment.
Other infrared sensors may be used.

Embodiment 2 FIG. 8 is a chart showing an operation flow of the high-frequency heating device of the second embodiment. In addition,
The basic configuration of the high-frequency heating device is the same as that of the first embodiment, and the description is omitted. Further, the same or corresponding parts as in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Next, the operation of the high-frequency heating device of this embodiment will be described with reference to the flowchart shown in FIG. The user opens the door of the high-frequency heating device 1 (not shown), puts the object to be heated 3 such as frozen food into the heating chamber 2, places the object on the turntable 4, closes the door, and closes the door. A cooking start button is pressed by operating a cooking menu button (not shown) or the like (YES in step S201). When the cooking start button is pressed, the magnetron 6 and the turntable 4 are driven (Step S202). next,
A timer is used to determine whether or not it is the temperature distribution detection timing of the thermopile modules 10a and 10b, and if it is the detection timing (YES in step S203), the thermopile modules 10a and 10b detect the temperature distribution (step S204).

Here, for the thermopile module 10b, when the temperatures detected by the thermopiles 11 in the 16 regions are stored in the storage means 14, the average temperature of the 16 temperature data and the temperature difference (deviation) from this average temperature are obtained. ) Is calculated. If the temperature difference is equal to or more than a predetermined value, for example, 5 ° C. or more, it is recognized that the temperature of the object to be heated 3 is detected, it is determined that the element is a firing element (step S205), and the number of the firing elements is calculated and stored. It is stored in the means 24.

The detection of the number of firing elements is performed, for example, four times at every predetermined detection timing until the turntable 4 makes one revolution (NO in step S206). Then, when the turntable 4 makes one round (YES in step S206), the position of the turntable 4 at which the number of firing elements becomes the maximum is stored from the calculated data of the number of firing elements stored in the storage means 24 for four times (step S206). Step S207). When the number of ignition elements is at a maximum, it indicates that the article to be heated 3 is closest to the power supply ports 8a and 8b.

Accordingly, based on the position of the turntable 4 stored in the storage means 24, the speed of the turntable 4 is controlled (step S208). As an example of the variable speed control, when the object 3 to be heated is closest to the power supply ports 8a and 8b, the speed of the turntable motor 5 is reduced for a certain period of time so that the object 3 is heated near the power supply ports 8a and 8b where the electric field strength is strong. Thing 3
By passing slowly. The object to be heated 3
The rotation of the turntable motor 5 may be stopped for a certain period of time (for example, 10 seconds) when is closest to the power supply ports 8a and 8b.

After performing the above-described heating control, it is determined whether a predetermined stop condition is satisfied, for example, the thermopiles 11Aa to 11Dd of the thermopile modules 10a and 10b.
It is determined whether or not the average temperature has reached a predetermined temperature (step S209). If a predetermined stop condition is satisfied,
The driving of the magnetron 6 and the turntable 4 is stopped to end the heating cooking (step S210).

Embodiment 3 FIG. FIG. 9 is a longitudinal sectional view of a main part of a high-frequency heating apparatus according to Embodiment 3 of the present invention, and FIGS.
FIG. 1 is a diagram showing a detected area of a thermopile unit according to Embodiment 3 of the present invention. Note that the basic configuration of the high-frequency heating device is the same as that of the first embodiment, and a description thereof will be omitted. Further, the same or corresponding parts as in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 9, reference numeral 28 denotes a locking portion projecting from a substantially central portion of the left and right wall surfaces in the heating chamber 2 in the vertical direction.
Reference numeral 9 denotes a two-stage plate on which both ends are locked by the locking portions 28 and which divides the heating chamber 2 up and down and on which the object 3 to be heated is placed. The two-stage plate 29 has a substantially square planar shape and is formed of a low dielectric constant material that transmits high frequency, a metal material that does not transmit high frequency, or the like. Reference numeral 10c is provided at the upper corner of the heating chamber 2, divides substantially the entire surface of the two-stage plate 29 into 16 regions of a 4 × 4 matrix when the two-stage plate 29 is mounted, and detects the surface temperature of each of the divided regions. The thermopile module 10d is a thermopile module provided at the corner of the wall of the heating chamber 2 to divide the substantially entire surface of the turntable 4 into 16 areas of a 4 × 4 matrix and detect the surface temperature of each of the divided areas. is there. Also,
3a is an object to be heated placed on the turntable 4, 3b
Is an object to be heated placed on the two-stage plate 29.

The detected areas of the thermopile modules 10c and 10d will be described with reference to FIGS.
FIG. 10 shows the thermopile module 1 when the two-stage plate 29 is installed.
It is a figure which shows the to-be-detected area of 0c and 10d, (a) is a top view, (b) is a ZZ sectional view of (a). The detected area 14 is 4 × 4 corresponding to the thermopiles 11Aa to 11Dd divided into 16 4 × 4 areas shown in FIG.
Are divided into 16 regions. That is, the thermopile module 10c divides substantially the entire surface of the two-stage plate 29 into 16 regions, and the thermopile module 10d
Is divided into 16 regions and the temperature distribution in the region is detected.

On the other hand, FIGS. 11A and 11B are diagrams showing the detection areas of the thermopile modules 10c and 10d when the two-stage plate 29 is not installed. FIG. 11A is a top view, and FIG. It is a ZZ sectional view. The thermopile modules 10c and 10d partially overlap each other and divide the substantially entire surface of the turntable 4 into 16 × 2 = 32 areas. That is, it is possible to three-dimensionally (three-dimensionally) detect the temperature distribution of the object to be heated 3a placed on the turntable 4 from two directions.

Next, the heating operation of the high-frequency heating device 1 and the detection of the temperature distribution of the objects to be heated 3a, 3b will be described with reference to FIGS. First, depending on the purpose of cooking, it is selected whether or not to install the two-stage plate 29 in the heating chamber 2. If it is installed, the two-stage plate 29 is placed on the locking portion 28 and the turntable 4 is set. And the object to be heated 3 on the two-stage plate 29
a, 3b are placed and the door (not shown) is closed.

Next, when a power switch (not shown) is turned on, the magnetron 6 is driven, a microwave is transmitted, and the microwave is supplied into the heating chamber 2 through the waveguide 7 and the upper and lower feed ports 8a and 8b. Then, the objects to be heated 3a and 3b are heated. At this time, the turntable motor 5 is also driven at the same time, and the object to be heated 3a placed on the turntable 4 is heated while rotating.

At this time, if the object to be heated 3b placed on the two-stage plate 29 is made of, for example, the low-permittivity material such as heat-resistant glass which transmits high frequency, the heating chamber 2 Is physically partitioned, the uneven heating can be reduced by the stirring effect of the standing wave by the metal rotary plate (not shown). When the two-stage plate 29 is mounted, the object to be heated 3a placed on the turntable 4 is heated by the microwave supplied from the lower power supply port 8b, and the object to be heated placed on the two-stage plate 29 is heated. 3b is heated mainly by the microwave supplied from the upper power supply port 8a.

On the other hand, the thermopile module 10c, 1
When the microcomputer 26 is energized, the infrared rays radiated from the detection area 14 are condensed by the condenser lens 13 and received by the thermopile unit 12. The temperature of the thermopile 11 of the thermopile unit 12 changes due to light reception,
The temperature difference between the hot junction and the cold junction of the thermocouple is converted into a voltage and output.

At this time, the scanning means 15 outputs one of the output voltages of the thermopile unit 12, for example, the thermopile 1Aa, according to the output signal output from the signal output means 20.
And outputs the selected voltage to the first amplifying means 16. On the other hand, thermopile unit 12
The reference temperature element 17 arranged near the cold junction detects the ambient temperature, that is, the absolute temperature, and outputs a voltage to the second amplifying means 18. The output voltages amplified by these amplifying means 16 and 18 are compared and amplified by the differential amplifying means 19,
Even if the ambient temperature changes, the temperature of the measured area can be accurately detected as a voltage value.

The voltage compared and amplified by the differential amplifying means 19 is supplied to the A / D converting means 22 built in the microcomputer 26.
And converted into a digital signal. The digital signal is converted into temperature data by the temperature data conversion means 23 and stored in the storage means 14 as temperature data of the thermopile 11Aa. The above operation is performed by the thermopile 11Aa.
Up to 11Dd, thermopile modules 10c, 10d
The temperature data of all the thermopiles can be stored in the storage means 24 by sequentially performing d 32 times. By providing a plurality of storage means 24, it becomes possible to store temperature data for each time series.

Upon receiving the temperature data stored in the storage means 24 and the address signal data from the signal output means 21, the control means 25 performs an arithmetic process. For example, if it is calculated from the temperature data stored in the storage unit 24 that the temperature of the object to be heated 3b is higher than the temperature of the object to be heated 3a, the degree of progress of heating of the object to be heated 3b is fast, and thus the object to be heated 3a
In order to enhance the microwave irradiation, the motor for the movable plate is driven via the driver 27 to move the movable plate 9 upward to narrow the upper power supply port 8a. On the other hand, if it is calculated that the temperature of the object to be heated 3a is higher than the temperature of the object to be heated 3b, the movable plate 9 is moved downward to narrow the lower power supply port 8b. If this operation is repeated at predetermined intervals, the objects to be heated 3a, 3
The heating of b can be completed at the same time, overheating of one of the objects to be heated can be prevented, and the frequency with which the user takes out the object to be heated can be once.

When the two-stage plate 29 is not installed on the engaging portion 28, the planar temperature distribution and the shape (two-dimensional shape) of the object 3a to be heated from above are described in the same manner as in the first embodiment. Unlike the case of detecting the shape, the thermopile modules 10c and 10d are detected from both directions, and the detection results are combined to recognize the three-dimensional temperature distribution and the shape (three-dimensional shape) of the object 3a to be heated. Heating control.

Further, irrespective of the presence or absence of the two-stage plate 29 on the locking portion 28, when the initial temperature of the objects 3a and 3b to be heated is detected by the thermopile modules 10c and 10d, the initial temperature is low. When the user selects the thawing cooking by the input means, the magnetron 6 is normally set in the initial stage of the heating cooking in order to prevent overheating of the ends of the objects 3a and 3b due to the edge runaway phenomenon. After the temperature of any of the areas detected by the thermopile modules 10c and 10d has become equal to or higher than a predetermined temperature, for example, the driving to the magnetron 6 can be suppressed. Thereby, a suitable thawing finish can be obtained.

Embodiment 4 FIG. 12 is a control block diagram of a high-frequency heating device according to Embodiment 4 of the present invention.
FIG. 3 is a chart showing a control flow of the high-frequency heating device. The basic configuration of the high-frequency heating device is the same as that of the third embodiment.
Therefore, the description is omitted. Embodiment 1
The same or corresponding parts as in FIG. 3 are denoted by the same reference numerals and description thereof is omitted.

In this embodiment, the actual control operation of the control means 25 of the high-frequency heating device described in the third embodiment will be described. In FIG. 12, reference numeral 30 denotes a two-stage plate detection unit that is included in the control unit 25 and detects whether or not the two-stage plate 29 is installed;
Reference numeral 31 denotes a heating control unit that performs a heating control operation of the object to be heated 3, and 32 denotes a display / alarm unit that outputs the results of the two-stage plate detection unit 30 and the heating control unit 31. The display / alarm unit 32 displays, for example, the presence or absence of the two-stage plate 29, the three-dimensional temperature distribution and the shape (three-dimensional shape) of the object to be heated 3 using a liquid crystal screen or the like, and detects error information. In this case, the user is warned by an alarm device such as an error display or a buzzer.

Next, the control operation of the control means 25 of the high-frequency heating device of this embodiment will be described with reference to the flowchart shown in FIG. When the cooking start button on the operation panel (not shown) of the high-frequency heating device 1 is turned on (step S301), counters and flags used in the program are initialized (step S30).
2) Then, the magnetron 6 and the turntable 4 are driven (step S303). Next, it is measured by a timer whether or not it is the temperature distribution detection timing of the thermopile modules 10c and 10d, and if it is the detection timing (YES in step S304), the temperature distribution is detected by the thermopile modules 10c and 10d (step S304). S305). Here, if the detection timing is set to, for example, about 3 seconds of a quarter turn of the turntable 4, the temperature distribution of the object to be heated 3 is detected every quarter turn.

When the temperature distribution of the object 3 is detected, the detected temperature data is stored in the storage buffer of the storage means 24 as the current temperature data of the thermopile modules 10c and 10d (step S306). Further, if there is temperature data for which the temperature distribution of the previously heated object 3 has been detected, the difference between the current temperature data of the thermopile modules 10c and 10d stored in the storage buffer and the temperature data detected one time before is obtained. Then, this difference value is stored as temperature difference data of the thermopile modules 10c and 10d (step S307).

Next, it is determined whether or not temperature data (temperature data for one round of the turntable + 1 temperature data) for five or more temperature distribution detections is stored in the storage buffer (step S308). If yes, the process proceeds to the next step (YES in step S308), and the temperature change data between the current temperature data and the temperature data at the same position one turn before the turntable 4 is stored in the storage buffer (step S309). As described above, two patterns of time-series temperature changes can be calculated, and based on these data stored in the storage buffer, the following two-stage dish detection (step S310) and heating control (step S311) are performed.

Next, the control operation for detecting the two-stage plate 29 will be described with reference to the flow chart of FIG. First, it is determined whether or not there is a negative component in the temperature difference data of the 16 regions of the thermopile module 10c, that is, whether or not there is a region where the current temperature data has a lower temperature than the previous temperature data. A determination is made (step S401). If there is a negative component (YES in step S401), it is recognized that the temperature of the heated object 3 rotating on the turntable 4 is detected, and the turntable 4 is rotationally driven. The rotation counter of the table 4 is incremented (step S402).

Next, one of the thermopile modules 10d
It is determined whether or not there is a negative component in the temperature difference data of the thermopile 11 in the six regions (step S40).
3). If there is a negative component (step S403)
YES), the turntable 4 recognizes that the temperature of the rotating object 3 is being detected, and the turntable 4
Is reset to 0 (step S404). On the other hand, if there is no negative component (NO in step S403), it recognizes that the turntable 4 is not rotating, and increments the table stop counter as error information (step S405). By performing the above operation at each detection timing of the thermopile modules 10c and 10d, the counter values of the rotation counter and the stop counter are increased or reset to zero.

Next, it is determined whether or not the value of the stop counter of Table 4 has exceeded a predetermined value (SC) (step S).
406). This predetermined value is, for example, 1 of the turntable 4.
If the detection timing of the thermopile modules 10c and 10d is set every / 4 rotation, it is set to 4. In addition, when the negative component is at least once, the stop counter is reset to 0 as described above, so that the temperature difference data of any of the thermopile modules 10d has a predetermined value only when there is no negative component for five consecutive times. (SC)
Malfunction can be prevented.

If the value of the stop counter in Table 4 exceeds the predetermined value (SC) (YE in step S406)
S) For example, when the object to be heated 3 placed on the turntable 4 is large, it comes into contact with the wall surface of the heating chamber 2, and the turntable motor 5 idles with respect to the turntable 4 and the rotary plate. Judgment is made and a stop flag is set (step S407). This turntable 4,
If the rotary plate and the heated object 3 are stopped,
This is because microwaves cannot be agitated by the rotary plate, causing uneven heating of the object 3 to be heated.

On the other hand, when the value of the stop counter in Table 4 does not exceed the predetermined value (SC) (Step S406)
NO), for example, a temperature change pattern in the column direction is calculated from the temperature data (temperature data for four times) of the thermopile modules 10c and 10d for one round of the turntable 4 (step S408), and the respective thermopile modules 10c and 10d The temperature change pattern of 10d is compared (step S409). If it is determined that the temperature change pattern does not satisfy the predetermined equivalent condition (step S
409), the temperature change pattern difference counter is incremented (step S410), and it is determined whether the temperature change pattern difference counter is equal to or more than a predetermined value (step S411). When the change pattern difference counter is equal to or more than the predetermined value (YE in step S411).
S), since the thermopile module 10c does not detect the temperature distribution of the object 3 to be heated on the turntable 4, the thermopile module 10c determines that the two-stage plate 29 is installed, and determines that the two-stage cooking is being performed. (Step S)
412).

If the temperature change pattern satisfies the predetermined equivalent condition (NO in step S409), the two-stage plate 2
9 is not installed, and it is determined that one-stage cooking is being performed. However, in order to prevent malfunction, it is determined whether or not the rotation counter of the turntable 4 is equal to or more than a predetermined value (step S413). If the rotation counter is equal to or more than the predetermined value (YES in step S413), the two-stage plate 29 is determined. It is determined that the single-stage cooking for heating only the object to be heated 3 placed on the turntable 4 without being installed is performed, and the single-stage flag is set (step S414). If the rotation counter is not equal to or greater than the predetermined value (NO in step S413), the process returns without setting a flag.

Next, the heating control operation of the object to be heated 3 will be described with reference to the flow chart of FIG. Here, the temperature change data (step S309) between the current temperature data stored in the storage buffer and the temperature data at the same position one turn before the turntable 4 described in the flow of FIG. 12 is used. First, it is determined whether or not a predetermined heating end condition described later is satisfied (step S501). If the heating end condition is satisfied (YES in step S501),
A stop flag is set (step S502).

If the predetermined heating termination condition is not satisfied (NO in step S501), a load check, that is, a determination as to whether or not there is the object 3 to be heated is performed. In particular, at the early stage of heating cooking, the load check is always performed because the heating end condition is not satisfied. Here, it is determined whether or not the temperature change data between the current temperature data for the 16 areas of the thermopile module 10c and the temperature data at the same position one turn before the turntable 4 exceeds a predetermined value (NT). (Step S503).

If the temperature change data of any one of the 16 areas of the thermopile 11 of the thermopile module 10c exceeds a predetermined value (NT) (YES in step S503), the temperature of the object 3 to be heated is increased. The counter value of the no-load counter that determines that the distribution is detected and performs the no-load determination is reset to 0 (step S50).
4). At the same time, the thermopile 11 that detects the temperature of the area corresponding to the temperature change data exceeding the predetermined value (NT) is determined as a firing element, and this firing element is stored (step S505).

If all the temperature change data do not exceed the predetermined value (NT) (NO in step S503), the no-load counter is incremented (step S50).
6) It is determined whether or not the counter value of the no-load counter has exceeded a predetermined value (NC) (step S507). If the counter value of the no-load counter exceeds the predetermined value (NC) (YES in step S507), the thermopile module 10c has not detected the object 3 to be heated.
It is determined that there is no load on the heating and cooking, and a no-load flag is set (step S508).

Next, one of the thermopile modules 10d
Current temperature data and turntable 4 for 6 areas
It is determined whether or not the temperature change data with the temperature data at the same position one cycle before has exceeded a predetermined value (NT) (step S509). One of the temperature change data is a predetermined value (N
T) is exceeded (YE in step S509).
S), the counter value of the no-load counter that determines that the temperature distribution of the article to be heated 3 is detected and performs no-load determination is reset to 0 (step S510). At the same time, the thermopile 11 that detects the temperature of the area corresponding to the temperature change data exceeding the predetermined value (NT) is determined as a firing element, and this firing element is stored (step S51).
1).

If all the temperature change data do not exceed the predetermined value (NT) (NO in step S509), the no-load counter is incremented (step S51).
2) It is determined whether the counter value of the no-load counter has exceeded a predetermined value (NC) (step S513). If the counter value of the no-load counter exceeds the predetermined value (NC) (YES in step S513), the thermopile module 10d has not detected the object 3 to be heated.
It is determined that there is no load on the heating and cooking, and a no-load flag is set (step S514).

Next, the thermopile module 10c, 1
It is determined whether or not the no-load flag of 0d is set, and if both are set (step S
515: NO), it is determined that there is no load, that is, there is no object 3 to be heated, and a stop flag is set (step S502). If both no-load flags are not set or only one of the thermopile modules 10c and 10d is set (YES in step S515), the detection of the two-stage plate 29 described above It is determined whether or not the two-stage flag is set (step S516).

When the two-stage flag is on (YES in step S516), the two-stage cooking with the two-stage plate 29 is set.
Depending on whether the no-load flag is set for each of c and 10d, the object to be heated 3 is placed on both the turntable 4 and the two-stage plate 29, or the object to be heated 3 is placed on only one of them. Is determined. When any one of the upper and lower sides has no load, the movable plate 9 can be moved in the direction of no load, and efficient heating control can be performed in the direction where the object 3 is placed. For example, when it is determined that the object to be heated 3 is not placed on the two-stage plate 29, the movable plate 9 is moved upward to close the upper power supply port 8a, and the object to be heated 3 on the turntable 4 is closed. Can be concentratedly heated.

The thermopile module 10c, 1
The heating state of the object to be heated 3 is recognized from the temperature distribution of each ignition element 0d, and the magnetron 6 and the movable plate 9 are controlled based on the heating state. For example, if it is calculated that the temperature of the object 3 placed on the turntable 4 is higher than the temperature of the object 3 placed on the two-stage plate 29, the movable plate 9 can be moved downward. And squeeze the lower feed port 8b,
The heating of both the objects to be heated 3 can be completed at the same time.

Further, the condition for terminating the heating is determined based on the temperature change data of the object to be heated 3 and the current temperature data. This heating termination condition can be set according to the temperature or the heating time. For example, in the case of the temperature condition, the condition can be set based on the average temperature and the maximum temperature of the firing element, a time-series temperature change, and the like. On the other hand, when the user sets the finishing temperature, that temperature can be used. When the user sets the type of the object to be heated 3 (for example, sake, milk, etc.), the user can use the temperature according to the type. A suitable temperature may be set.

If the two-stage flag is not set (NO in step S516), the two-stage plate 29 is not installed and the one-stage cooking state is set, and the thermopile modules 10c and 10d are set as described in the first embodiment. The three-dimensional temperature distribution and the shape (three-dimensional shape) of the object to be heated 3 can be recognized based on the detection results. In addition, the heating state of the object to be heated 3 is recognized from the temperature distributions of the ignition elements of the thermopile modules 10c and 10d, and the magnetron 6 and the movable plate 9 are moved based on the heating state as described in the first embodiment. Control. Further, the heating termination condition is determined from the temperature change data of the object to be heated 3 and the current temperature data in the same manner as in the case of the two-stage cooking.

As a result of the double tray detection (step S310) and the heating control (step S311), it is determined whether or not the stop flag is set (step S312). If the stop flag is not set (N in step S312)
O), input control of the magnetron 6 and position control of the movable plate 9 set in the heating control (step S311) are performed (step S313). At this time, the current heating status and the like are displayed on the liquid crystal screen of the display / warning means 32. Specific examples of the heating state and the like include the presence or absence of the two-stage dish 29 (whether single-stage cooking or two-stage cooking), and the three-dimensional temperature distribution and shape (three-dimensional shape) of the object 3 in the cooking mode. ,
There are input information of the magnetron 6, position information of the movable plate 9, and the like.

If the stop flag is set (YES in step S312), the magnetron 6 and the turntable 4 are stopped (step S315), and it is determined whether or not error information is included as a stop condition (step S315). Step S316). If error information is included (YES in step S316), the display / warning means 32 displays the error content or emits a warning sound for a predetermined time (step S317). On the other hand, when the error information is not included (NO in step S316), since the normal heating is completed, the display / warning means 32 completes the heating to the user with a predetermined heating completion display and a notification sound. Is notified (step S318). In this case, together with the end display, the finished temperature, the three-dimensional temperature distribution of the object to be heated 3, and the like can be displayed on the liquid crystal screen until the user takes out the object to be heated.

[0089]

As is apparent from the above invention, the high-frequency heating apparatus according to the present invention comprises a heating means for mounting an object to be heated in a heating chamber for heating, and a plurality of heating areas to be heated by the heating means. First temperature distribution detecting means for detecting the temperature of each area by dividing the area, and second temperature detecting means for dividing the heating area into a plurality of areas at different angles from the first temperature distribution detecting means and detecting the temperature of each area. Temperature distribution detecting means, and storage means for storing the plurality of temperature data detected by the two temperature distribution detecting means one by one in association with a predetermined area in the divided areas, wherein the storage means outputs The three-dimensional surface temperature distribution or the three-dimensional shape of the object to be heated is recognized based on the detection result of the temperature distribution in the heating area.
As a result, when the object to be heated (food) is put into the heating chamber, a three-dimensional (three-dimensional) temperature distribution of the object to be heated is detected, and the object to be heated (food) is detected from the detection result. , The heating control suitable for the three-dimensional shape and temperature distribution can be performed.

Further, in the heating and cooking apparatus according to the present invention, the two temperature distribution detecting means are each constituted by a plurality of thermopiles arranged in a matrix, and the heating means is associated with the arrangement of the plurality of thermopiles. The area is divided into a plurality of areas. As a result, when the object to be heated (food) is put into the heating chamber, a three-dimensional (three-dimensional) temperature distribution of the object to be heated is detected, and the object to be heated (food) is detected from the detection result. , The heating control suitable for the three-dimensional shape and temperature distribution can be performed.

Further, the heating and cooking apparatus according to the present invention is provided with a heating means for supplying microwaves to an object to be heated placed in a heating chamber via a waveguide and a power supply port, and is heated by the heating means. First temperature distribution detecting means for dividing the heating area into a plurality of areas and detecting the temperature of each area, and detecting the temperature of each area by dividing the heating area into a plurality of areas from a different angle from the first temperature distribution detecting means And a second temperature distribution detecting means for detecting a three-dimensional surface temperature distribution or a three-dimensional shape of the object to be heated from the detection results of the first temperature distribution detecting means and the second temperature distribution detecting means. The aperture of the power supply port is changed based on the recognized three-dimensional surface temperature distribution or three-dimensional shape. As a result, the three-dimensional (three-dimensional) temperature distribution of the heated object (food) to be heated is detected, and the three-dimensional shape of the heated object (food) is recognized from the detection result. By performing efficient heating control based on the shape and temperature distribution, quick and uniform heating cooking becomes possible.

The heating and cooking apparatus according to the present invention comprises a heating means for placing an object to be heated in a heating chamber for heating, a driving means for rotating the object to be heated, and a heating means for heating the object. First temperature distribution detecting means for dividing the area into a plurality of areas and detecting the temperature of each area; and detecting the temperature of each area by dividing the heating area into a plurality of areas from an angle different from that of the first temperature distribution detecting means. A second temperature distribution detecting means for recognizing a three-dimensional surface temperature distribution or a three-dimensional shape of the object to be heated from detection results of the first temperature distribution detecting means and the second temperature distribution detecting means; Control means for controlling the rotation of the object to be heated based on the recognized three-dimensional surface temperature distribution or three-dimensional shape is provided. As a result,
The three-dimensional (three-dimensional) temperature distribution of the object to be heated (food) is detected, and the three-dimensional shape of the object to be heated (food) is recognized from the detection result. By performing efficient heating control based on the temperature distribution, quick and uniform heating cooking becomes possible.

Further, the heating and cooking apparatus according to the present invention comprises a heating means for placing an object to be heated in a heating chamber and heating the heating means, and a separating means which is detachably installed in the heating chamber and divides the heating chamber into two regions. Means, and two temperature distribution detecting means arranged respectively for each of the divided areas and dividing the heating area heated by the heating means into a plurality of areas to detect the temperature of each area. Detects the surface temperature distribution of the object to be heated placed in each of the divided areas,
When the sorting means is not installed, the three-dimensional surface temperature distribution or the three-dimensional shape of the object to be heated is recognized based on the detection results of the two temperature distribution detecting means. As a result, when the two-stage cooking and the one-stage cooking in which the heating chamber is divided into two can be selected, two temperature distribution detection results are separately used for each of the two-stage cooking and the one-stage cooking, and according to the cooking mode. Thus, efficient heating control can be performed.

Further, the heating and cooking apparatus according to the present invention comprises a heating means for placing an object to be heated in a heating chamber for heating, and a separating means which is detachably installed in the heating chamber and divides the heating chamber into two regions. Means, and two temperature distribution detecting means arranged in each of the divided areas and detecting a temperature of each area by dividing a heating area heated by the heating means into a plurality of areas. It is to judge whether or not the sorting means is installed in the heating chamber based on the detection result of the distribution detecting means. As a result, when the two-stage cooking and the one-stage cooking in which the heating chamber is divided into two can be selected, the distinction between the one-stage cooking and the two-stage cooking is detected by detecting the temperature distribution of the object to be heated in each of the upper and lower stages. Thus, heating control suitable for each cooking mode can be performed.

Further, the heating cooking device according to the present invention is provided with a power supply port for supplying microwaves to the heating chamber for each of the two divided areas. As a result, it is possible to detect the distinction between the single-stage cooking and the two-stage cooking, and to supply the microwave suitable for each cooking mode.

Further, the heating and cooking apparatus according to the present invention comprises a heating means for placing an object to be heated in a heating chamber for heating, a driving means for rotating the object to be heated, and a heating means to be heated by the heating means. One or more temperature distribution detecting means for dividing the area into a plurality of areas and detecting the temperature of each area at predetermined intervals, and a plurality of temperature data detected by the temperature distribution detecting means in a predetermined area of the divided areas. Storage means for storing each one of them in association with an area, wherein rotation detection of the object to be heated is performed based on whether or not a time-series temperature change is equal to or more than a predetermined value based on a detection result from at least one temperature distribution detection means. It is. As a result, the temperature change of the object to be heated is calculated from the result of the temperature distribution detection, the presence or absence of rotation of the object to be heated can be determined, and the result can be used for detecting an abnormal state.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a high-frequency heating device according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a thermopile unit according to the first embodiment of the present invention.

FIG. 3 is a control block diagram of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a detected area of the thermopile unit according to the first embodiment of the present invention.

FIG. 5 is a diagram showing temperature data of each area of the thermopile unit according to the first embodiment of the present invention.

FIG. 6 is a diagram showing detected areas and temperature data of each area of the thermopile unit according to the first embodiment of the present invention.

FIG. 7 is a chart showing an operation flow of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 8 is a chart showing an operation flow of the high-frequency heating device according to the second embodiment of the present invention.

FIG. 9 is a sectional view of a main part of a high-frequency heating device according to a third embodiment of the present invention.

FIG. 10 is a diagram showing a detected area of a thermopile unit according to Embodiment 3 of the present invention.

FIG. 11 is a diagram showing a detected area of a thermopile unit according to Embodiment 3 of the present invention.

FIG. 12 is a control block diagram of a high-frequency heating device according to Embodiment 4 of the present invention.

FIG. 13 is a chart showing a control flow of the high-frequency heating device according to Embodiment 4 of the present invention.

FIG. 14 is a chart showing a control flow for detecting a two-stage dish of the high-frequency heating device according to the fourth embodiment of the present invention.

FIG. 15 is a chart showing a control flow of a heating operation of the high-frequency heating device according to Embodiment 4 of the present invention.

FIG. 16 is a block diagram showing a functional configuration of a conventional high-frequency heating device.

[Explanation of symbols]

1 high-frequency heating device main body, 2 heating chamber, 3, 3a,
3b object to be heated, 4 turntable, 4a rotary plate, 5 motor for turntable, 6
Magnetron, 7 waveguide, 8a upper feed port,
8b Lower power supply port, 9 movable plate, 9a motor for movable plate, 10a, 10b, 10c, 10d thermopile module, 11, 11Aa to 11Dd thermopile, 12 thermopile unit, 13 condensing lens, 14, 14a, 14b detection area, Reference Signs List 15 scanning means, 16 first amplifying means, 17 reference temperature element, 18 second amplifying means, 19 differential amplifying means, 20 signal output means, 21 multiplexer,
22 A / D conversion means, 23 temperature data conversion means, 24 storage means, 25 control means, 26 microcomputer, 27 driver, 28
Locking part, 29 two-stage plate, 30 two-stage plate detection means,
31 heating control means, 32 display alarm means.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F24C 15/16 F24C 15/16 J H05B 6/68 320 H05B 6/68 320Q (72) Inventor Takayuki Hiramitsu Tokyo 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F term (reference) 3K086 AA01 CA04 CA15 CB04 CB05 CB06 CC06 CD12 3L086 AA01 BB08 BB13 CB05 CB15 CB16 CC30 DA07 DA12

Claims (8)

[Claims] 1. A heating means for placing an object to be heated in a heating chamber for heating, and a first temperature distribution detecting means for dividing a heating area heated by the heating means into a plurality of areas and detecting the temperature of each area. Means, a second temperature distribution detecting means for dividing the heating area into a plurality of areas at different angles from the first temperature distribution detecting means, and detecting temperatures in the respective areas, and a plurality of means for detecting the temperature in each of the two temperature distribution detecting means. Storage means for storing the temperature data of each of the divided areas one by one in association with a predetermined area of the divided areas, and a three-dimensional image of the object to be heated based on a temperature distribution detection result of the heating area output from the storage means. A cooking device characterized by recognizing a surface temperature distribution or a three-dimensional shape. 2. The method according to claim 1, wherein the two temperature distribution detecting means include a plurality of thermopiles arranged in a matrix, and the heating area is divided into a plurality of areas in association with the arrangement of the plurality of thermopiles. The heating cooking device according to claim 1, wherein 3. A heating means for supplying microwaves to an object placed in the heating chamber through a waveguide and a power supply port,
First temperature distribution detecting means for dividing the heating area heated by the heating means into a plurality of areas and detecting the temperature of each area; and dividing the heating area into a plurality of areas from an angle different from that of the first temperature distribution detecting means. And a second temperature distribution detecting means for detecting the temperature of each area by detecting the three-dimensional surface temperature distribution or the three-dimensional surface temperature distribution of the object to be heated from the detection results of the first temperature distribution detecting means and the second temperature distribution detecting means. A heating cooking device that recognizes a three-dimensional shape and changes the degree of opening of the power supply port based on the recognized three-dimensional surface temperature distribution or three-dimensional shape. 4. A heating means for placing an object to be heated in a heating chamber for heating, a driving means for rotating the object to be heated, and a heating area heated by the heating means divided into a plurality of areas. First temperature distribution detecting means for detecting the temperature of
A second temperature distribution detecting means for dividing a heating area into a plurality of areas at different angles from the first temperature distribution detecting means and detecting a temperature of each area, wherein the first temperature distribution detecting means and the second temperature distribution detecting means; The three-dimensional surface temperature distribution or three-dimensional shape of the object to be heated is recognized from the detection result of the temperature distribution detecting means, and the rotation of the object to be heated is controlled based on the recognized three-dimensional surface temperature distribution or three-dimensional shape. A heating cooking device provided with control means. 5. A heating means for placing an object to be heated in a heating chamber and heating the heating object; a separating means which is detachably installed in the heating chamber and divides the heating chamber into two areas; And two temperature distribution detecting means for detecting a temperature of each area by dividing a heating area heated by the heating means into a plurality of areas, and respectively mounting the divided areas when the sorting means is installed. Detecting the surface temperature distribution of the object to be heated, and recognizing the three-dimensional surface temperature distribution or the three-dimensional shape of the object to be heated based on the detection result of the two temperature distribution detecting means when the classification means is not installed. A heating and cooking device characterized by performing. 6. A heating means for placing an object to be heated in a heating chamber for heating, a separating means which is detachably installed in the heating chamber and divides the heating chamber into two areas, And two temperature distribution detecting means for dividing the heating area heated by the heating means into a plurality of areas and detecting the temperature of each area, based on the detection results of the two temperature distribution detecting means. A heating cooking apparatus characterized in that it is determined whether or not the sorting means is installed in the heating chamber. 7. The heating cooking device according to claim 5, wherein a power supply port for supplying a microwave to the heating chamber is provided for each of the two divided areas. 8. A heating means for placing and heating an object to be heated in a heating chamber, a driving means for rotating the object to be heated, and a heating area heated by said heating means divided into a plurality of areas and separated by a predetermined interval. One or more temperature distribution detecting means for detecting the temperature of each area for each area, and storage means for storing a plurality of temperature data detected by the temperature distribution detecting means one by one in association with a predetermined area in the divided areas Wherein the rotation of the object to be heated is detected based on whether or not a time-series temperature change is equal to or more than a predetermined value based on a detection result from at least one temperature distribution detecting means.