JP3692467B2 - High frequency heating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high-frequency heating apparatus that controls heating of food or the like using microwaves.
[0002]
[Prior art]
Since the high-frequency heating apparatus is a method of heating food with microwaves, the electric field distribution in the heating chamber is inevitably strong or weak due to the standing waves of the microwaves. For this reason, the heating efficiency of a small food is inferior, and a large food has a large difference between a heated portion and a non-heated portion. Therefore, conventionally, the following configurations have been proposed in order to improve heating efficiency or improve heating unevenness.
[0003]
As a first conventional high-frequency heating device, one described in Japanese Patent Application Laid-Open No. 11-118156 is synchronized with the rotation of the turntable by a plurality of infrared sensor elements arranged linearly along the radial direction of the turntable. The temperature of multiple locations of the food is detected, the shape of the food is recognized based on the temperatures of the multiple locations of the food, and the recognized shape of the food and the temperatures of the minimum and maximum temperatures of the multiple locations are recognized. Some heating output control is performed based on the difference to improve heating unevenness.
[0004]
In addition, as a second conventional high-frequency heating device, the one described in JP-A-11-193931 is provided with a rotating plate configured in a non-homogeneous shape at the bottom of the heating chamber, for example, “warming rice”, “sake Measure the ideal microwave electric field strength distribution of typical cooking such as "No-Maki" and "Defrost" from the predetermined food load and the stop position of the rotating plate, and incorporate this into the product database Thus, according to the food type input by the user, the rotation plate is stopped at the ideal stop position of the rotation plate to improve the heating efficiency.
[0005]
[Problems to be solved by the invention]
However, the configuration of the high-frequency heating device as described above has the following problems. In the first conventional example, the heating unevenness is adjusted by variably controlling the heating output based on the temperature difference between the lowest temperature and the highest temperature of a plurality of temperatures, and if the temperature difference is greater than a predetermined value, the output is reduced by a predetermined amount. For this reason, there is a problem that heating takes time.
[0006]
In the second conventional example, for example, even when the user performs an input operation of “warming rice”, the food load (amount of rice) that is actually put into the heating chamber, the container in which the rice is put, the number of items to be heated, etc. However, since the ideal microwave electric field intensity distribution is different, there is a problem that it is not compatible with various cooking.
[0007]
The present invention has been made to solve such problems, and detects the quantity and size of an object to be heated (food item) and efficiently heats it appropriately corresponding to the quantity and size. An object of the present invention is to obtain a high-frequency heating apparatus that can perform quick and uniform cooking by performing control.
[0008]
[Means for Solving the Problems]
  The present inventionPlaced on the turntableHeating means for heating an object to be heated;Rotating turntableDriving means to be heated and a region heated by the heating meansIn a matrixTemperature detection means for detecting the temperature of each region divided into a plurality of regions;A plurality of regions divided by the temperature detection means are subdivided, a reference value for each subdivided region is calculated based on temperature data, and the shape of the object to be heated is inferred based on the reference value for each region Shape inference means and drive means based on the shape of the object to be heated inferred by the shape inference meansAnd a control means for controlling.
[0009]
  The present invention also provides:The shape inference means further subdivides a plurality of regions formed by subdivision, calculates a reference value for each subdivided region based on a reference value for each region in the previous stage, and sets the reference value for each region. Based on this, the shape of the object to be heated is inferred, and this inference is repeated until the shape of the object to be heated can be recognized.
[0010]
  The present invention also provides:The control means infers the temperature deviation of the object to be heated from the temperature data of the plurality of regions detected by the temperature detection means and the shape data of the object to be heated inferred by the shape inference means, and based on the temperature deviation Control the driving means.
[0011]
  The present invention also provides:The shape inference means calculates the center position of the object to be heated from a plurality of areas constituting the shape of the object to be heated, and the control means includes the center position of the object to be heated and the center position of the turntable calculated by the shape inference means. And the driving means is controlled in accordance with the deviation of the center position of the object to be heated.
[0012]
  The present invention also provides:Display means for displaying the temperature distribution based on the reference values of a plurality of regions constituting the shape of the heated object inferred by the shape inference means.
[0013]
  The present invention also provides:A display means for displaying the shape of the heated object inferred by the shape inference means is provided.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a control block diagram of a high frequency heating apparatus according to Embodiment 1 of the present invention, FIG. 2 is an enlarged view of a thermopile unit according to Embodiment 1 of the present invention, and FIG. 3 is a configuration diagram of this high frequency heating apparatus. .
[0018]
1 and 2, 1 Aa to 1 Dd are thermopiles (hereinafter referred to as “thermopile 1” when an arbitrary thermopile from 1 Aa to 1 Dd is represented). The upper case letter of the first alphabet indicates the order of A, B, C, D from the first line, the lower case letter of the next alphabet indicates the order of a, b, c, d from the first column and is arranged in 4 rows and 4 columns Has been. Reference numeral 2 denotes a thermopile unit in which 16 elements of a thermopile 1 are arranged in a 4 × 4 matrix. Reference numeral 3 denotes a light collecting unit arranged in front of the thermopile unit 2 to collect infrared rays radiated from the detection region 4 on the thermopile unit 2. It is a lens.
[0019]
On the other hand, 5 is a scanning means for selecting an output signal from the thermopile 1 by an address signal described later, and 6 is a first amplifying means for amplifying the output signal selected by the scanning means 5 to a predetermined level. Reference numeral 7 denotes a contact-type reference temperature element composed of a thermistor or the like disposed in the vicinity of the cold junction of the thermopile 1, and 8 denotes a second amplification means for amplifying the output signal from the reference temperature element 7 to a predetermined level. Reference numeral 9 denotes differential amplifying means for comparing and amplifying the signal amplified by the first amplifying means 6 and the output signal amplified by the second amplifying means 8 as inputs. Here, reference numeral 10 wraps the thermopile unit 2, the scanning means 5, the first amplifying means 6, the reference temperature element, the second amplifying means 8, and the differential amplifying means 9 in a can package or the like, and the surface of this package This is a thermopile module in which the condenser lens 3 is disposed.
[0020]
11 is an address signal output means for outputting address signals from the thermopiles 1Aa to 1Dd to the scanning means 5 at a predetermined timing, 12 is an A / D conversion means for converting the voltage output of the differential amplifying means 9 into a digital signal, and 13 is A temperature data conversion means for converting the digital signal output of the A / D conversion means 12 into temperature data, and 14 is a storage means for storing the temperature data output from the temperature data conversion means 13 and a storage buffer corresponding to 16 elements of the thermopile 1 have. Reference numeral 15 denotes a shape inference means that receives the output signals from the address signal output means 11 and the storage means 14 and infers the shape of the food or the like from the 4 × 4 matrix temperature distribution of 16 elements of the thermopiles 1Aa to 1Dd. Reference numeral 16 denotes a heating control means for performing heating control based on the temperature data stored in the storage means 14 and the shape data inferred by the shape inference means 15. Reference numeral 17 denotes a microcomputer (hereinafter referred to as a “microcomputer”) having a built-in external signal output means 11, A / D conversion means 12, temperature data conversion means 13, storage means 14, shape reasoning means 15, and heating control means 16. .
[0021]
In FIG. 3, 18 is a high-frequency heating device body, 19 is a heating chamber for heating an object to be heated 20 such as food, 21 is a turntable on which the object to be heated 20 is placed, and 22 is a rotary drive for the turntable 21. This is a turntable motor. Reference numeral 23 denotes a magnetron that generates a microwave, 24 a denotes a waveguide that serves as a path for the microwave, and 24 b denotes a power supply port that supplies the microwave provided on the wall of the heating chamber 19 into the heating chamber 19. Reference numeral 25 denotes an operation panel provided on the front surface of the main body, and has an input means for inputting various cooking conditions and a heating start command.
The thermopile module 10 is disposed on the ceiling surface of the heating chamber 19 so that the condenser lens 3 faces downward. Accordingly, the detection area 4 becomes the bottom of the heating chamber 19 that covers the turntable 21, and the temperature distribution of the object to be heated 20 placed on the turntable 21 can be detected.
[0022]
Next, temperature distribution detection of the object to be heated 20 placed on the turntable 21 will be described with reference to FIG. In FIG. 1, when a power switch (not shown) is turned on and the thermopile module 10, the microcomputer 15, and the display unit 16 are energized, infrared rays emitted from the detection region 4 are condensed by the condenser lens 3 and the thermopile unit. 2 receives light. The thermopile 1 of the thermopile unit 2 changes its temperature by receiving light, converts the temperature difference generated between the hot junction and the cold junction of the thermocouple into a voltage and outputs it.
[0023]
At this time, the scanning means 5 selects one of the output voltages of the thermopile unit 2, for example, the output voltage from the thermopile 1 Aa, and selects it to the first amplifying means 6 by the address signal output from the address signal output means 11. Output the output voltage. On the other hand, the reference temperature element 7 disposed in the vicinity of the cold junction of the thermopile unit 2 detects the ambient temperature, that is, the absolute temperature, and outputs a voltage to the second amplifying means 8. Since the output voltages amplified by these amplifying means 6 and 8 are compared and amplified by the differential amplifying means 9, even if the ambient temperature changes, the temperature of the measured region can be accurately detected as a voltage value. it can.
[0024]
The voltage compared / amplified by the differential amplifier 9 is input to an A / D converter 12 built in the microcomputer 15 to become a digital signal, which is converted into temperature data by the temperature data converter 13. And stored in the storage means 14 as temperature data of the thermopile 1Aa. By performing the above operations 16 times sequentially from thermopile 1Aa to 1Dd, the temperature data of all the thermopile can be stored in the storage means 14.
[0025]
Upon receiving the temperature data stored in the storage means 14 and the address signal data from the address signal output means 11, the shape inference means 15 infers the shape of the object to be heated 20 placed on the turntable 21. FIG. 4 is a relational diagram showing the temperature data stored in the storage means 14 for each address based on the address signal data from the address signal output means 11. In FIG. 4, 26Aa to 26Dd are addresses corresponding to each thermopile 1, and absolute value data of temperature at each address is shown. As in the case of the thermopile 1 sequence, the uppercase letters of the first alphabet indicate the order of A, B, C, D from the first row, and the lowercase letters of the next alphabet are a, b, c, d from the first column. The order is shown and arranged in 4 rows and 4 columns. That is, the temperature detected by the thermopile 1Aa corresponds to the temperature data indicated by the address 26Aa, and the temperature detected by the thermopile 1Ab corresponds to the temperature data indicated by the address 26Ab. Here, it is shown that the addresses 26Aa, Ab, Ac, Ad, Ba have a temperature of 20 (° C.), the address 26Bb has a temperature of 60 (° C.), and the temperature of 26Bc has a temperature of 50 (° C.).
[0026]
Next, the shape recognition process of the heated object 20 placed on the turntable 21 will be described with reference to FIGS. For example, when the shape inference operation is performed during high-frequency heating, the temperature of the object to be heated 20 rises, while the temperature other than the object to be heated 20 becomes the temperature of the object to be heated 20. It becomes lower than that. Therefore, the temperature data of the thermopile in which the entire detection range detects the temperature of the object to be heated 20, the temperature data of the thermopile in which a part of the detection range detects the temperature of the object to be heated 20, and other than the object to be heated 20 The temperature decreases in the order of the temperature data of the thermopile detecting the temperature.
[0027]
On the other hand, in FIG. 4, the maximum temperature is 60 ° C. and the minimum temperature is 20 ° C. Therefore, for example, when the threshold value of the object to be heated 20 and the other part is set to (maximum temperature + minimum temperature) / 2, the temperature of the object to be heated 20 is 40 ° C. in the example of FIG. The hatched portion shown in a). It is rough that the shaded portion is recognized as the shape of the object to be heated 20, and as is apparent from FIG. 5 (b) showing a comparison with the actual object to be heated 20, the approximate position and size are shown. However, efficient heating control cannot be performed. Therefore, it is inferred whether the detection range is the temperature data of the thermopile that detects the temperature of the object to be heated 20 or the part of the detection range is the temperature data of the thermopile that detects the temperature of the object to be heated 20. There is a need.
[0028]
Therefore, the 4 × 4 matrix area shown in FIG. 4 is subdivided so as to become a 1/4 (25%) area as shown by the dotted line in FIG. This subdivided area is represented by a solid line, and the 4 × 4 matrix area shown in FIG. 4 is represented by a dotted line as shown in FIG. Next, a reference value according to the temperature data calculated based on the temperature data 26Aa to Dd of each area is determined according to the structure of the subdivided area. Since this reference value is not pure temperature data, it is a value represented only by an absolute value and has no unit. Further, addresses 27Aa to 27Gg are assigned to the subdivided areas in the same manner as in FIG. Here, in FIG. 7, the uppercase letter of the first alphabet indicates the order of A, B, C, D, E, F, G from the first line, and the lowercase letter of the next alphabet starts from the first column, a, b, c, The order of d, e, f, and g is shown and arranged in 7 rows and 7 columns.
[0029]
In determining the reference value, when the subdivided area is composed of only one of the 16 areas shown in FIG. 4, the temperature data of the area is directly used as the reference value. For example, the address 27Aa is composed only of the address 26Aa, so the reference value is 20, the address 27Cc is composed only of the address 26Bb, the reference value is 60, and the address 27Ce is composed only of the address 26Bc, so the reference value is 50. On the other hand, when the subdivided area is composed of a plurality of areas in the 16 areas shown in FIG. 4, the sum of the composition ratio multiplied by the temperature data of the previous area becomes the reference value. For example, the address 27Bb is composed of the addresses 26Aa, 26Ab, 26Ba, and 26Bb at the same ratio.
Therefore,
Reference value of address 27Bb = (26Aa temperature data + 26Ab temperature data + 26Ba temperature data + 26Bb temperature data) / 4
The reference value of the address 27Bb = (20 + 20 + 20 + 60) / 4 = 30.
Further, for example, the address 27Bc is configured at an equal ratio from the addresses 26Ab and 26Bb. Therefore,
Reference value of address 27Bc = (temperature data of 26Ab + temperature data of 26Bb) / 2, and reference value of 27Bc = (20 + 60) / 2 = 40.
[0030]
This calculation is performed for all the subdivided addresses 27Aa to 27Gg, and the reference values at the respective addresses are shown in FIG. Based on the reference value for each address in FIG. 7, the threshold value between the object to be heated 20 and the other parts is set to (maximum reference value + minimum reference value) / 2 as before the subdivision. Thus, the shape of the object to be heated 20 can be inferred from the hatched portion shown in FIG. Therefore, the shape can be inferred with a resolution four times that shown in FIG.
[0031]
When the above segmentation is further repeated for the 7 × 7 49 regions shown in FIG. 8 by the above method, the second segmentation region is shown in FIG. When 20 is overlapped, it can be seen that the shape inference shown in FIG. 9B is approaching the actual shape of the object to be heated 20. Further, when the third subdivision is performed from FIG. 9, FIG. 10A is obtained. When the object to be heated 20 is overlapped, the shape inference shown in FIG. It can be seen that the shape is quite close. By repeatedly performing such subdivision as necessary, the shape of the object to be heated 20 can be accurately recognized.
[0032]
In addition, since the viewing angle of each thermopile 1 and the distance from the thermopile 1 to the bottom of the heating chamber 19 are set in advance, one area shown in FIG. 4, for example, the area S1 of the address 26Aa can be calculated in advance. Therefore, the area S1 'of the subdivided region can be calculated by multiplying the area S1 by a subdivision division ratio (for example, 1/4). Therefore, the area of the object to be heated 20 can be accurately inferred by multiplying the area S1 'by the number of regions exceeding the threshold.
The area can also be calculated using the turntable 21 as follows. The area of the turntable 21 is determined in advance, and if the turntable 21 is heated or cooled to a certain temperature to be different from the room temperature, the turntable 21 is used as shown in FIG. 11 using the shape recognition process described above. Thus, the relationship between the shape of the turntable 21 and the subdivided area is calculated. At this time, since the number of areas exceeding the threshold multiplied by the area of one subdivided area is equal to the area of the turntable 21, the area of the subdivided one area can be easily calculated. .
[0033]
Further, the average coordinate of the area constituting the shape of the object to be heated 20 is obtained from the shape inference of the object to be heated 20, or the remaining area narrowed down by an algorithm for scraping around one lump is centered. Thus, the center position (centroid) of the object to be heated 20 can be inferred. Accordingly, the distance from the bottom of the heating chamber 19, that is, the center of the turntable 21 to the center of the object to be heated 20 can be calculated, and the degree of positional deviation when the object to be heated 20 is placed on the turntable 21 can be determined. It becomes.
[0034]
The shape recognition process and the area calculation process described above are performed when the object to be heated 20 is in a refrigerator or a freezer and the temperature of the object to be heated 20 is sufficiently lower than the temperature in the heating chamber 19, or during cooking. When the temperature is sufficiently higher than the temperature in the chamber 19, it can be performed before cooking by the high-frequency heating device 18. On the other hand, when food or the like that has just been left in the room is the object to be heated 20, the maximum temperature and the minimum temperature detected by the thermopile 1 after a certain period of time has elapsed after the start of cooking by the high-frequency heating device 18. It is set so that the shape recognition process and the area calculation process are performed after the temperature difference reaches 5 ° C. or more.
[0035]
Next, the electric field distribution in the heating chamber of the high-frequency heating device described in this embodiment will be described. FIG. 12 is a front view of the high-frequency heating device showing a state in which the beaker is arranged in the heating chamber, and FIG. 13 is a top view of the high-frequency heating device showing a state in which the position of the beaker is changed.
12 and 13, 28 is a beaker filled with 200 (cc) of water. The distance from the power supply port 24b to the beaker 28 was changed to 4 cm, 15 cm, and 26 cm, high frequency heating was performed by the magnetron 23, and each time until the water in the beaker 28 boiled was measured. The experimental results are shown in FIG. The initial temperature of water was all 19 (° C.), and the experiment was conducted without rotating the turntable 21 during high-frequency heating.
[0036]
From the experimental results shown in FIG. 14, it can be seen that the further away from the power supply port 24 b, the longer the heating time is required, and when it is placed on both ends of the turntable 21, a difference of 1 minute or more occurs in the heating time. That is, as the distance of the microwave from the power supply port 24b increases, the electric field strength decreases and the electric field strength becomes non-uniform in the heating chamber 19. This greatly affects the heating efficiency during high-frequency heating. FIG. 15 shows the strength of the electric field intensity in the heating chamber 19 using isointensity lines 29a, 29b, and 29c. The isointensity line shows that 29a has the strongest electric field strength and gradually becomes weaker as 29b and 29c.
[0037]
Next, with reference to the flowchart shown in FIG. 16, operation | movement of the high frequency heating apparatus of this embodiment is demonstrated.
The user opens a door of a high-frequency heating device (not shown), puts an object to be heated 20 such as frozen food in the heating chamber 19, places it on the turntable 21, closes the door, and cooks the operation panel 25. The menu button or the like is operated to press the cooking start button (YES in step S101). When the cooking start button is pressed, the temperature of the 4 × 4 = 16 region at the bottom of the heating chamber including the article to be heated 20 is detected by the thermopiles 1Aa to 1Dd in the thermopile unit 2 arranged on the ceiling of the heating chamber 19. (Step S102). When the temperatures of the 16 regions are stored in the storage means 14, the temperature difference between the average temperature of the 16 temperature data and the temperature of the region having the largest deviation from the average temperature is a predetermined value or more, for example, 5 ° C. or more. Determine if there is a difference.
[0038]
When there is no difference of 5 ° C. or more from the temperature of the region having the largest deviation from the average temperature (NO in step S103), normal heating control is performed because the shape of the article to be heated 20 cannot be inferred (NO in step S103). Step S104). When there is a difference of 5 ° C. or more from the beginning and when the article to be heated 20 is heated by normal heating control and a difference of 5 ° C. or more is obtained (YES in step S103), 16 stored in the storage unit 14 is stored. Based on the individual temperature data and the address information from the signal output means 11, the shape inference means 15 infers the shape of the article to be heated 20 (step S105). When the shape of the object to be heated 20 is inferred by the above-described subdivision method, the planar area of the object to be heated 20 is calculated based on this (Step S105).
[0039]
The heating control means 16 drives the magnetron 23 by selecting any output amount from a plurality of preset heating outputs according to the planar area of the article 20 to be heated (step S106). After setting the heating output, the center position of the object to be heated 20 is calculated based on the inferred shape of the object to be heated 20, and the distance between the center position of the object to be heated 20 and the center position of the turntable 21 is predetermined. It is determined whether or not the distance is above (step S107). If not more than a predetermined distance (YES in step S107), it is determined whether the temperature deviation is equal to or greater than a predetermined value in consideration of address symmetry (step S108).
[0040]
This temperature deviation will be specifically described with reference to FIG. 4. The temperature difference between the average temperature of the addresses 26Bb, 26Bc, 26Cb, and 26Cc and the temperature of the area having the largest deviation from the average temperature of these four areas is obtained. If there is more than a predetermined value, or there is a temperature difference between the average temperature of the temperature data of the outer 12 regions such as the addresses 26Aa, 26Ab, 26Ac and the temperature of the region having the largest deviation from the average temperature of these four regions. In this case, it is determined that there is a predetermined temperature deviation.
[0041]
If the deviation of the center of the article to be heated 20 is greater than or equal to a predetermined value, or if the temperature deviation is greater than or equal to a predetermined value (NO in steps S107 and S108), the turntable motor 22 is controlled at a variable speed (step S110). This variable speed control will be specifically described below. FIG. 17 shows the temperature distribution for each detection area when the object to be heated 20 is round and large such as pizza, corresponding to each area. The average temperature of the temperature data of the addresses 26Bb, 26Bc, 26Cb, and 26Cc is (40 × 3 + 60) / 4 = 45 ° C., and the maximum temperature in the four regions is 60 ° C. Therefore, since the temperature deviation is 15 ° C., the variable speed control of the turntable motor 22 is performed.
[0042]
As an example of variable speed control, when the turntable 21 is rotating in the direction of the arrow shown in FIG. 17, the address 26Cc, which is a high temperature region of pizza, will soon pass near the power supply port 24b where the electric field strength is strong. To do. At this time, the rotational speed of the turntable motor 22 is increased for a certain period of time so that the high temperature region 26Cc can quickly pass through the vicinity of the power supply port 24b having a strong electric field strength, and the temperature increase of the high temperature region 26Cc can be suppressed. The temperature difference is reduced and temperature unevenness can be eliminated, and the time zone in which the other region passes near the power supply port 24b where the electric field strength is strong becomes longer, so that the heating efficiency is increased.
[0043]
Similarly, when the distance between the center position of the object to be heated 20 and the center position of the turntable 21 is a predetermined distance or more, the speed of the turntable motor 22 is increased for a certain period of time in the portion where the object to be heated 20 is not present, This is done by promptly passing the vicinity of the strong power feeding port 24b.
[0044]
The variable speed control is not limited to this, and the rotation speed of the turntable motor 22 may be slowed when the high temperature region 26Cc passes through a position farthest from the power supply port 24b where the electric field strength is weak. Further, when the object to be heated 20 exists but there is a low temperature region due to temperature unevenness based on the inference result of the shape inference means, a certain time (for example, when this region passes near the power supply port 24b where the electric field strength is strong (for example, 10 seconds) The rotation of the turntable motor 22 may be stopped.
[0045]
When the deviation of the center of the object to be heated is not more than a predetermined value (YES in step S107) and the temperature deviation is not more than a predetermined value (YES in step S108), normal heating control is performed (step S109). When the above-described variable speed heating control or normal heating control is performed for a predetermined time (YES in steps S111, 112, 113), the heating ends (step S114), and when the predetermined time is not reached (steps S111, 112). (No in 113) The temperature of the 16 regions at the bottom of the heating chamber is detected again by the thermopiles 1Aa to 1Dd (step S102), and the above control is repeated. This predetermined time is, for example, a heating time, and can be set to a time until the average temperature of the thermopiles 1Aa to Dd reaches a predetermined temperature.
[0046]
In the present embodiment, the thermopile, which is a thermal infrared sensor, has been described in consideration of handling properties that do not require cooling and cost efficiency that can be applied to electrical equipment, but other infrared sensors may be used.
[0047]
Embodiment 2. FIG.
Figure18, 19These are figures which show the to-be-detected area | region of the thermopile unit concerning Embodiment 2. FIG. Note that the basic configuration of the high-frequency heating apparatus is the same as that of the first embodiment, and thus the description thereof is omitted. Also, the same reference numerals are given to the same or corresponding parts as those in the first embodiment, and the description will be omitted.
[0048]
The thermopile unit 2 in the thermopile module 10 is composed of 8 elements of thermopile 1A to 1H arranged in a 1 × 8 array. The detection area 4 of the thermopile unit 2 is shown in FIG.18As shown in FIG. 4, the thermopile 1A to 1H is divided into 4A to 4H. The thermopile 1A detects the temperature of the detection area 4A, and the thermopile 1B detects the temperature of the detection area 4B. Therefore, the detection region 4 covers the diameter portion of the turntable 21, and the center is the central portion of the turntable 21.
[0049]
Next, the temperature distribution detection of the object to be heated 20 placed on the turntable 21 in the high-frequency heating device according to Embodiment 2 of the present invention will be described with reference to FIGS.20Will be described. The heated object 20 placed on the turntable 21 is also rotated by starting the high-frequency heating or by rotating the turntable 21 independently. Here, when temperature data for one row is input from the thermopile module 10 to the microcomputer 15 every 1/8 cycle of the rotation of the turntable 21, the circular 4 × 8 = 32 in 1/2 cycle of the turntable 21. Is stored in the storage means 14. Figure20Is a relationship diagram of the detection region of the thermopile 1 and its temperature data, and shows temperature data for one column. This makes it possible to obtain 32 pieces of temperature data for four rows.
The shape inference means 15 receives the temperature data stored in the storage means 14 and the address signal data from the address signal output means 11, and the shape inference means 15 of the object to be heated 20 placed on the turntable 21 is the same as in the first embodiment. Infer shape.
[0050]
In the present embodiment, the detection area 4 of the thermopile unit 2 is the diameter portion of the turntable 20, but the present invention is not limited to this.19As shown in FIG. 4, the radius portion, that is, the portion from the center of the turntable 21 to the circumference may be used. In this case, the temperature distribution of the object to be heated 20 on the turntable 21 can be displayed more finely. Further, temperature information for one row is input from the thermopile module 10 to the microcomputer 15 every 1/8 cycle, and when the turntable 21 makes one turn, the temperature on the turntable 21 can be detected.
[0051]
In this embodiment, a 1 × 8 thermopile unit is used. However, the present invention is not limited to the number of thermopile 1 as long as the array is 1 × n (n = 2, 3, 4,...).
[0052]
Embodiment 3 FIG.
Figure21These are the block diagrams of the high frequency heating apparatus concerning Embodiment 3 of this invention, a figure22Is a figure21It is a top view of the high frequency heating apparatus. 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. Also, the same reference numerals are given to the same or corresponding parts as those in the first embodiment, and the description will be omitted.
[0053]
Figure21, 22, 20 a and 20 b are virtue to-be-heated objects, and two are placed on the turntable 21. Also figure23FIG. 3 is a relational diagram showing temperature data for each address based on the temperature data stored in the storage means 14 shown in FIG. 1 based on the address signal data from the address signal output means 11. Figure2326Aa to 26Dd are addresses corresponding to each thermopile 1, and absolute value data of temperature at each address is shown. Here, the temperature of 26Bb is 50 (° C.), the temperature of addresses 26Ab, Ba, Cc is 40 (° C.), the temperature of addresses 26Cd, Dc is 30 (° C.), and the addresses 26Aa, 26Ac, Ad, Bc, Bd, Ca , Cb, Da, Db, Dd are 20 (° C.).
[0054]
Next, the shape recognition process of the heated objects 20a and 20b placed on the turntable 21 will be described. Figure23Then, the maximum temperature is 50 ° C. and the minimum temperature is 20 ° C. Therefore, for example, when the threshold value of the object to be heated 20 and other parts is set to (maximum temperature + minimum temperature) / 2,23In this example, the temperature is 35 ° C., and the shape of the heated objects 20a and 20b is inferred.23The shaded area shown in FIG. It is rough to recognize that the shaded portion is the shape of the object to be heated 20a, 20b, and efficient heating control cannot be performed. Therefore, it is necessary to infer the shapes of the objects to be heated 20a and 20b as in the first embodiment.
[0055]
Where23The 4 × 4 matrix area shown in FIG. 6 is divided and subdivided so as to be a 1/4 (25%) area. A reference value according to the temperature data calculated based on the temperature data 26Aa to Dd of each area is determined according to the structure of the subdivided area. By repeating such subdivision as necessary, the subdivided area is24The objects to be heated 20a and 20b are shown in the hatched portions. Here, it shows that the positions of the object to be heated 20a and the object to be heated 20b are separated and two objects to be heated 20 are placed on the turntable 21, for example, by scraping around these two blocks. The number of the objects to be heated 20 can be obtained by counting the number of remaining areas that have been narrowed down by a certain algorithm.
[0056]
In addition, since the viewing angle of each thermopile 1 and the distance from the thermopile 1 to the bottom of the heating chamber 19 are set in advance,231 area, for example, the area S2 of the address 26Aa can be calculated in advance. Accordingly, the area S2 'of the subdivided region can be calculated by multiplying the area S2 by the subdivision division ratio (for example, 1/4). Therefore, if the area S2 'is multiplied by the number of regions exceeding the threshold value, the areas of the heated objects 20a and 20b can be accurately inferred.
[0057]
Further, the average coordinates of the coordinates of the regions constituting the shapes of the objects to be heated 20a and 20b are obtained from the shape inference of the objects to be heated 20a and 20b, or each of the objects to be heated is determined by an algorithm for shaving the surroundings. It is also possible to infer the center position (centroid) of the objects 20a and 20b. Thus, the directionality and the distance from the bottom of the heating chamber 19, that is, the center of the turntable 21 to the center of the heated objects 20 a and 20 b can be calculated, and the heated objects 20 a and 20 b are placed on the turntable 21. At this time, it is possible to determine how much and in which direction the position is shifted. Figure25These are figures which show the relationship between the center position of the turntable 21, and the center position of the to-be-heated material 20a, 20b.
[0058]
Next, figure26The 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 (not shown), puts the objects to be heated 20a, 20b such as sake bottles in the heating chamber 19, places them on the turntable 21, closes the door, The cooking menu button or the like is operated to press the cooking start button (YES in step S201). When the cooking start button is pressed, the temperature of the 4 × 4 = 16 region at the bottom of the heating chamber including the heated objects 20a and 20b is set by the thermopile 1Aa to 1Dd in the thermopile unit 2 arranged on the ceiling of the heating chamber 19. It detects (step S202). When the temperatures of the 16 regions are stored in the storage means 14, the temperature difference between the average temperature of the temperature data and the temperature of the region having the largest deviation from the average temperature is a predetermined (2 to 8 ° C.) or more, for example, 5 Judge whether there is a difference of ℃ or more.
[0059]
If there is no difference of 5 ° C. or more between the average temperature of the temperature data and the temperature of the region having the largest deviation from the average temperature (NO in step S203), the shapes of the heated objects 20a and 20b cannot be inferred. Normal heating control is performed (step S204). When there is a difference of 5 ° C. or more from the beginning and when the heated object 20 is heated by normal heating control and a difference of 5 ° C. or more is added (YES in step S203), 16 stored in the storage unit 14 is stored. Based on the temperature data and the address information from the signal output means 11, the shape inference means 15 infers the shapes of the objects to be heated 20a and 20b (step S205). When the shapes of the objects to be heated 20a and 20b are inferred by the above-described subdivision method, the planar areas of the objects to be heated 20a and the objects to be heated 20b are calculated based on this (Step S205).
[0060]
The heating control means 16 drives the magnetron 23 by selecting any one of a plurality of preset heating outputs according to the plane area as the sum of the object to be heated 20a and the object to be heated 20b. (Step S206). After setting the heating output, it is determined whether or not there are a plurality of objects to be heated based on the inferred shapes of the objects to be heated 20a and 20b (step S207). When the object to be heated 20 is singular, the same operation as in the first embodiment is performed. In the present embodiment, the case where the object to be heated 20 is a plurality of objects to be heated 20a and 20b will be described.
[0061]
The center positions of the object to be heated 20a and the object to be heated 20b are calculated, the positional relationship between the center position of the objects to be heated 20a and 20b and the center position of the turntable 21, that is, the direction and the distance are determined, and the turntable motor 22 is controlled at a variable speed (step S208). This variable speed control will be specifically described below. From the positional relationship between the center position of the turntable 21 and the power supply port 24b, the rotation direction of the turntable 21, and the positional relationship between the central position of the heated objects 20a and 20b and the central position of the turntable 21, the heated objects 20a and 20b. And the positional relationship between the power supply port 24b can be calculated.
[0062]
Here, from the experimental results shown in FIG. 14, the further away from the power supply port 24 b, the longer the heating time is required, and when it is placed on both ends of the turntable 21, there is a difference of 1 minute or more in the heating time. That is, it can be seen that as the distance of the microwave from the power supply port 24b increases, the electric field strength decreases, and as shown in FIG. 15, the electric field strength near the power supply port 24b is the strongest and the heating efficiency increases.
[0063]
Therefore, when a plurality of objects to be heated 20a and 20b are placed on the turntable 21, the turntable motor 21 is controlled at a variable speed so that the objects to be heated 20a and 20b are efficiently irradiated with microwaves. . When the turntable 21 rotates counterclockwise,25In FIG. 1, one of the heated objects 20b, which is a virtue, will soon pass through the vicinity of the power supply opening 24b having a strong electric field strength.
[0064]
Figure25As described above, when the predetermined angle ΘA is reached, the rotational speed of the turntable motor 22 is decreased for a certain time so that the heated object 20b slowly passes in front of the power supply port 24b. Further, when the object to be heated 20b passes through the front of the power supply port 24b and reaches a predetermined angle ΘA, the rotation speed of the turntable 21 is returned to the normal value. If this is also performed in the case of the object to be heated 20a, the time zone in which the objects to be heated 20a and 20b pass near the power supply opening 24b having a strong electric field strength is compared with the case where the turntable 21 is rotated at a constant speed. Heating efficiency is also increased.
[0065]
The variable speed control is not limited to this, and the rotational speed of the turntable motor 22 may be increased when both the objects to be heated 20a and 20b are located away from the power supply port 24b. Alternatively, the rotation of the turntable motor 22 may be stopped for a certain period of time (for example, 10 seconds) when the heated objects 20a and 20b pass through the vicinity of the power supply port 24b having a strong electric field strength.
[0066]
When this variable speed heating control is performed for a predetermined time (YES in step S214), the heating is ended (step S215). When the predetermined time is not reached (NO in step S214), the thermopile 1Aa to 1Dd is again used. The temperature in the 16 regions at the bottom of the heating chamber is detected (step S202), and the above control is repeated. This predetermined time is, for example, a heating time, and can be set to a time until the average temperature of the thermopiles 1Aa to Dd reaches a predetermined temperature.
[0067]
As another example of variable speed control, when there are two objects to be heated 20, only one of the objects to be heated 20a, 20b (for example, the object to be heated 20a) may be heated earlier due to uneven heating. . In this case, the object to be heated 20a that has been warmed passes quickly in front of the power supply port 24b, and the object to be heated 20b that has not yet been heated passes slowly in front of the power supply port 24b or for a predetermined time (10 seconds). It may be stopped. By controlling in this way, the two objects to be heated 20 can be brought to the same temperature and cooking can be finished. Either one of the objects to be heated must be warmed up and heated again, or only one of the two objects becomes too hot. The problem can be solved and the user's feeling of using the equipment is increased.
[0068]
Embodiment 4 FIG.
Figure27These are control block diagrams and diagrams of the high-frequency heating device according to Embodiment 4 of the present invention.28These are figures which show the high frequency heating apparatus concerning Embodiment 4 of this 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. Also, the same reference numerals are given to the same or corresponding parts as those in the first embodiment, and the description will be omitted.
[0069]
Figure27, 28, 30 is a display means comprising a matrix-like liquid crystal screen which receives an output signal from the shape inference means 15 and subdivides and displays the temperatures detected by the 16 elements of the thermopiles 1Aa to 1Dd. This display means 30 is represented with, for example, black and white grayscale based on the reference value of the shape inference means 15 described in the first embodiment, and indicates that the darker the temperature is, the higher the temperature is inferred. ing. Further, the display means 30 may not only perform temperature distribution display, but may be a system in which the liquid crystal screen is set so that, for example, temperature distribution display and other information display can be switched by a switch or the like. Further, the display means 30 may be displayed by other methods such as a display, LED, EL, etc. in addition to the liquid crystal screen.
[0070]
The thermopile module 10 includes the matrix-shaped thermopile unit 2 shown in the first embodiment, and is disposed on the ceiling surface of the heating chamber 19 so that the condenser lens 3 faces downward. Therefore, the detection area 4 becomes the bottom of the heating chamber 19 that covers the turntable 21, and the temperature distribution of the object to be heated 20 placed on the turntable 21 can be detected. Based on the detected temperature, the display means 30 is divided into 49 by 7 × 7 and displayed in shades or colors. The display means 30 is composed of a liquid crystal screen and is arranged above the operation panel 25 so that the user can easily check the temperature distribution.
[0071]
Specifically, since the display unit 30 receives the reference value of each subdivided area calculated based on the temperature data of the addresses 26Aa to Dd from the shape inference unit 15, the display unit 30 sets the address of the subdivided area. It is determined which band belongs according to the corresponding reference value, and black and white grayscale levels corresponding to the determined band are displayed at a predetermined display location on the liquid crystal screen. This temperature distribution display is based on the reference value of each segmented area calculated based on the temperature data of the addresses 26Aa to Dd, and means that the temperature distribution is inferred. Hereinafter, this “display of inferred temperature distribution” will be described as “temperature distribution display”.
[0072]
For example, when the reference value indicates the reference value of the address 27Aa in FIG. 8, a black and white grayscale corresponding to the determined band is displayed in the upper left portion of the 49-divided liquid crystal screen. If the above is performed up to addresses 27Aa to 27Gg, which are subdivided areas, a temperature distribution display divided into 49 is displayed on the display means 30. This display update may be performed by updating one or a plurality of elements of the 49-divided liquid crystal screen, or by updating the display unit 49 by storing 49 reference values in the storage unit 14.
[0073]
The update of the temperature distribution display is determined by the timing at which the address signal output unit 11 outputs the address signal to the scanning unit 5 and the shape reasoning unit 15. Therefore, by adjusting the timing of output from the address signal output means 11, the predetermined time for changing the temperature display of the display means 30 can be adjusted, and the shorter the predetermined time is, the shorter the real time is. It becomes possible to display the temperature distribution of the detected region 4. In order to appeal real-time temperature distribution changes to the user's vision, it is desirable to update all the display of 49 elements within 3 (seconds), more preferably within 1 (second).
[0074]
The temperature distribution display by the display means 30 is a two-dimensional or three-dimensional display such as a black / white grayscale display, a display that changes any one of hue, saturation, and lightness such as a color display, a bar graph, a band graph, an overhead view, etc. Any method may be used as long as it appeals to the visual perception of the user of the high-frequency heating device, such as dimension display. It is also possible to display the absolute temperature digitally for each address and display it in addition to the temperature distribution display by overwriting or the like.
[0075]
Next, the operation of the high-frequency heating device according to Embodiment 4 of the present invention will be described. When a heating start command is issued by pressing a switch or the like in the operation panel 25, the magnetron 23 oscillates at a high frequency, and the microwave is irradiated into the heating chamber 19 through the waveguide 24a. At this time, the turntable 21 is rotated by the drive of the turntable motor 22 to reduce heating unevenness of the article to be heated 20 placed on the turntable 21.
[0076]
Here, when the object to be heated 20 rotates, the position of the object to be heated 20 corresponding to the detection area 4 divided into 4 × 4 changes, so the temperature displayed on the display means 30 in synchronization with this rotation. Changes from moment to moment. In addition, since the temperature of the object to be heated 20 generally increases as the heating progresses, the display means 30 displays the temperature change due to the rotation of the object to be heated 20 and the temperature change due to the progress of the heating. However, it is configured so that the user can easily understand that cooking is progressing. In other words, the user can obtain information such as how much time is likely to be taken, how much heating has progressed, and the heating state at a time, which is very convenient. Further, since the user can visually confirm the process of cooking, it is possible to give the user a new pleasure during cooking.
[0077]
Further, in the present embodiment, the description has been given of the display of 49 reference values, which are subdivided once by the shape reasoning means 15, on the display means 30 that is a liquid crystal screen, but the present invention is not limited to this. If the reference value when the subdivision is repeated repeatedly as much as necessary is displayed on the display means 30 as a liquid crystal screen, the user can visually confirm the cooking process more finely.
[0078]
Embodiment 5. FIG.
In the fourth embodiment, the temperature distribution is inferred and displayed based on the reference value of the subdivided region, but in this embodiment, the temperature distribution display and the shape display of the object to be heated 20 are displayed on the display means 30. Describe what you do in. Since the basic configuration of the high-frequency heating device is the same as that of the first and fourth embodiments, description thereof is omitted. Further, the same or corresponding parts as those in the first and fourth embodiments are denoted by the same reference numerals and the description thereof is omitted.
[0079]
The shape reasoning means 15 (maximum reference value + minimum reference value) / similarly before the threshold values of the object to be heated 20 and the other parts are subdivided based on the reference values for each region in FIG. When it is set to 2, it becomes 40, and the shape of the object to be heated 20 can be inferred as a hatched portion shown in FIG. Therefore, by outputting this information to the display means 30, the shape of the object to be heated 20 inferred on the liquid crystal screen can be displayed over the temperature distribution display or independently.
[0080]
Further, another method for displaying the shape of the article to be heated 20 on the display means 30 will be described below. Figure29These are the control block diagrams of the high frequency heating apparatus concerning Embodiment 5 of this invention. Figure29, 31 is a basic shape storage means in which a plurality of basic shapes are stored in advance, and 32 is a comparison means for comparing the shape inferred by the shape inference means 15 with a plurality of basic shapes stored in the basic shape storage means 31. is there. The comparison means 32 selects the basic shape closest to the shape inferred by the shape inference means 15 and outputs it to the display means 30. Accordingly, the shape of the object to be heated 20 inferred on the liquid crystal screen can be displayed using the basic shape stored in advance. As an example of this basic shape, in addition to a circle and a rectangle, a model shape of rice bowl or sake bowl may be used.
[0081]
【The invention's effect】
  As described above, according to the present invention, the area heated by the heating means is divided into a plurality of areas in a matrix, the temperature of each area is detected, the divided areas are subdivided, and the temperature data is used. In order to calculate the reference value of each subdivided region, infer the shape of the object to be heated based on the reference value for each region, and to control the heating based on the inferred shape of the object to be heated BecauseOf the object to be heated (food)From the reasoning of the shape, efficient heating control can be performed,It is possible to provide a high-frequency heating apparatus that enables quick and uniform cooking.
[0082]
  In addition, the present inventionAccording to the above, a plurality of regions formed by subdivision are further subdivided, a reference value for each subdivided region is calculated based on a reference value for each region in the previous stage, and the reference value for each region is calculated. Based on the reasoning of the shape of the object to be heated, this inference was repeated until the shape of the object to be heated was recognized.Shape of the object to be heated (food)Can be inferred more accurately, efficient heating control can be performed,It is possible to provide a high-frequency heating apparatus that enables quick and uniform cooking.
[0083]
  In addition, the present inventionAccording to the above, the temperature deviation of the heated object is inferred from the temperature data of the plurality of regions detected by the temperature detecting means and the shape data of the heated object inferred by the shape inferring means, and based on the temperature deviation Since the drive means is controlled, heating unevenness can be reduced and efficient heating control can be performed.It is possible to provide a high-frequency heating apparatus that enables quick and uniform cooking.
[0084]
  Moreover, according to the present invention,The center position of the object to be heated is calculated from a plurality of areas constituting the shape of the object to be heated, and the difference between the calculated center position of the object to be heated and the center position of the turntable is calculated. Because we controlled the heating according to the deviation ofIt is possible to provide a high-frequency heating apparatus that can perform efficient heating control and enables quick and uniform cooking.
[0085]
  In addition, the present inventionAccording to the above, since the temperature distribution is displayed based on the inferred reference values of the plurality of regions constituting the shape of the heated object, the cooking process can be visually confirmed by the user, and the enjoyment during cooking It is possible to provide a high-frequency heating apparatus that newly gives the user a user.
[0086]
  Moreover, according to the present invention,Since the inferred shape of the object to be heated is displayed, it is possible to provide a high-frequency heating apparatus that allows the user to visually confirm the cooking process and to give the user a new enjoyment during cooking.
[Brief description of the drawings]
FIG. 1 is a control block diagram of a high-frequency heating device according to Embodiment 1 of the present invention.
FIG. 2 is an enlarged view of a thermopile unit according to Embodiment 1 of the present invention.
FIG. 3 is a configuration diagram of a high-frequency heating device according to Embodiment 1 of the present invention.
FIG. 4 is a relationship diagram between temperature data and addresses of the thermopile unit according to the first embodiment of the present invention.
FIG. 5 is a relationship diagram between temperature data and addresses of the thermopile unit according to the first embodiment of the present invention.
FIG. 6 is a diagram illustrating subdivision of a matrix area according to the first embodiment of the present invention.
FIG. 7 is a relationship diagram between a reference value after subdividing and an address according to the first embodiment of the present invention;
FIG. 8 is a relationship diagram between a reference value after subdividing and an address according to the first embodiment of the present invention;
FIG. 9 is a diagram illustrating the second subdivision of the matrix area according to the first embodiment of the present invention.
FIG. 10 is a diagram for explaining the third subdivision of the matrix area according to the first embodiment of the present invention.
FIG. 11 is a view showing the shape of a turntable according to Embodiment 1 of the present invention.
FIG. 12 is a front view of the high-frequency heating device showing a state in which a beaker is arranged in the heating chamber according to Embodiment 1 of the present invention.
FIG. 13 is a top view of the high-frequency heating device showing a state where the arrangement position of the beaker according to the first embodiment of the present invention is changed.
FIG. 14 is a diagram showing the relationship between the position of the beaker and the heating time taken to boil according to Embodiment 1 of the present invention.
FIG. 15 is a top view of the high-frequency heating device showing the electric field strength in the heating chamber according to Embodiment 1 of the present invention.
FIG. 16 is a chart showing a control flow of the high-frequency heating device according to Embodiment 1 of the present invention.
FIG. 17 is a diagram showing the relationship between the temperature data of the thermopile unit according to Embodiment 1 of the present invention and the bottom of the heating chamber.
[Figure18It is a figure which shows the to-be-detected area | region of the thermopile unit concerning Embodiment 2 of this invention.
[Figure19It is a figure which shows the to-be-detected area | region of the thermopile unit concerning Embodiment 2 of this invention.
[Figure20It is a relationship diagram between temperature data of a thermopile unit according to Embodiment 2 of the present invention and a detected area.
[Figure21A configuration diagram of a high-frequency heating apparatus according to Embodiment 3 of the present invention.
[Figure22A top view of a high-frequency heating apparatus according to Embodiment 3 of the present invention.
[Figure23It is a relationship diagram between temperature data and addresses of the thermopile unit according to Embodiment 3 of the present invention.
[Figure24FIG. 11 is a diagram for explaining the third subdivision of the matrix area according to the third embodiment of the present invention.
[Figure25It is a relational diagram between the center position of the turntable and the center position of the object to be heated according to the third embodiment of the present invention.
[Figure26It is a chart showing a control flow of a high frequency heating apparatus according to Embodiment 3 of the present invention.
[Figure27It is a control block diagram of a high-frequency heating apparatus according to Embodiment 4 of the present invention.
[Figure28A configuration diagram of a high-frequency heating apparatus according to Embodiment 4 of the present invention.
[Figure29It is a control block diagram of a high-frequency heating apparatus according to Embodiment 5 of the present invention.
[Explanation of symbols]
1, 1 Aa to 1 Dd Thermopile, 2 Thermopile unit, 3 Condensing lens, 4, 4a to 4 h Detected area, 5 Scan means, 6 First amplifying means, 7 Reference temperature element, 8 Second amplifying means, 9 Difference Dynamic amplification means, 10 Thermopile module, 11 Address signal output means, 12 A / D conversion means, 13 Temperature data conversion means, 14 Storage means, 15 Shape inference means, 16 Heating control means, 17 Microcomputer, 18 High frequency heating device main body , 19 Heating chamber, 20, 20a, 20b, 28 Heated object, 21 Turntable, 22 Turntable motor, 23 Magnetron, 24a Waveguide, 24b Power supply port, 25 Operation panel, 26Aa-26Dd, 27Aa-27Dd Address, 29a, 29 b, 29c isointensity line, 30 display means, 31 basic shape memory means, 32 comparison means.

Claims (6)

Heating means for heating an object to be heated placed on the turntable ;
Drive means for rotationally driving the turntable ;
A temperature detecting means for detecting the temperature of each area by dividing the area heated by the heating means into a plurality of areas in a matrix ;
A plurality of regions divided by the temperature detection means are subdivided, a reference value for each subdivided region is calculated based on the temperature data, and the shape of the object to be heated is determined based on the reference value for each region. Shape inference means to infer,
High-frequency heating apparatus is characterized in that a control means for controlling said drive means based on the shape of the object to be heated inferred by the shape inferring means. The shape inference means further subdivides a plurality of regions formed by subdivision, calculates a reference value of each subdivided region based on a reference value of each region in the previous stage, and a reference value for each region 2. The high frequency heating apparatus according to claim 1, wherein the shape of the object to be heated is inferred based on the above, and the inference is repeated until the shape of the object to be heated can be recognized . The control means infers the temperature deviation of the heated object from the temperature data of the plurality of regions detected by the temperature detecting means and the shape data of the heated object inferred by the shape inference means, and the temperature deviation 3. The high frequency heating apparatus according to claim 1, wherein the driving means is controlled based on the frequency. The shape inference means calculates the center position of the object to be heated from a plurality of regions constituting the shape of the object to be heated,
The control means calculates a deviation between the center position of the heated object calculated by the shape inference means and the center position of the turntable, and controls the driving means according to the deviation of the center position of the heated object. The high-frequency heating device according to any one of claims 1 to 3, wherein 5. The display device according to claim 1, further comprising a display unit configured to display a temperature distribution based on a reference value of a plurality of regions constituting the shape of the heated object inferred by the shape inference unit. High frequency heating device. The high-frequency heating apparatus according to any one of claims 1 to 4, further comprising display means for displaying a shape of an object to be heated inferred by the shape inference means .

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