JP2001355853A - High frequency heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency heating device in which temperature distribution of a heating chamber can be detected easily in the whole area in a few number of measurements. SOLUTION: An infrared detection area 26 by a thermopile module 10 is formed by quartering a turn table to form a sector, and a quadrangle is formed of both the radius of the sector as its adjacent two sides. A turntable 21 on which food 23 is placed is turned by a turntable-driving means 22 at a constant velocity. The temperature is measured at every period of quarter of the turntable to obtain a temperature distribution on the whole surface of the turntable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device for heating food.

[0002]

2. Description of the Related Art As a conventional high-frequency heating apparatus using an infrared sensor, Japanese Patent Application Laid-Open No. 11-11 / 1999 discloses a heating apparatus for food.
No. 8156 is disclosed. This is because the infrared line sensor is installed on the ceiling of the high-frequency heating device, and the detection area is on the radius including the center of the turntable below,
The temperature measurement is repeated every 1/12 cycle of the turntable rotation, and the entire temperature distribution is obtained by combining one turntable turn.

[0003]

However, in the above method, in order to measure all temperature distributions on the turntable, it is necessary to measure as many as 12 points while the turntable makes one round. In that case, there is a problem that the measurement is dense in a portion close to the center, the detection areas overlap, and it is difficult to separate them when mapping.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and the temperature distribution on the turntable or at the bottom of the heating chamber when there is no turntable can be easily measured with a small number of measurements over the entire range with fine resolution. Then, an object is to provide a high-frequency heating device for performing heating.

[0005]

According to the present invention, there is provided a high-frequency heating apparatus comprising: a heating chamber for storing food; a turntable provided at the bottom of the heating chamber for mounting and rotating the food;
A heating means for heating the food, and a quadrilateral having two sides adjacent to each other in a fan shape formed by dividing the turntable into four equal parts are defined as a detected area unit, and the inside of the detected area unit is divided into a plurality. Temperature detecting means for detecting the temperature in the detected area unit by detecting infrared rays radiated from each of the divided areas; and the temperature detecting means, wherein the detected area unit is rotated every quarter turn of the turntable. Control means for controlling the rotation of the heating means and the turntable based on the temperature distribution, the temperature distribution of the entire turntable is determined by detecting the temperature of the turntable,
Is provided.

A heating chamber for storing food, a turntable provided at the bottom of the heating chamber for mounting and rotating the food, heating means for heating the food, and the turntable are divided into four equal parts. Adjacent two radii of the formed sector
A quadrilateral formed to be included in the side is defined as a detected area unit, and infrared rays emitted from each divided area obtained by dividing the detected area unit into a plurality are detected, including the vicinity of both radial outer sides of the sector. A temperature detecting means for detecting a temperature in the detected area unit; and a temperature detecting means for detecting the temperature of the detected area unit every quarter rotation of the turntable. And a control means for controlling rotation of the heating means and the turntable based on the temperature distribution.

A heating chamber for storing the food, a turntable provided at the bottom of the heating chamber for mounting and rotating the food, a heating means for heating the food, and one end of a diagonal line rotating the turntable. A square located at the center and having a diagonal length equal to the radius of the turntable is a detected area unit, and detects infrared rays emitted from each divided area obtained by dividing the detected area unit into a plurality. Temperature detecting means for detecting the temperature in the detected area unit; and detecting the temperature of the detected area unit every quarter turn of the turntable by the temperature detecting means, thereby detecting the temperature of the entire turntable. Control means for determining the distribution and controlling the rotation of the heating means and the turntable based on the temperature distribution.

Further, the temperature detecting means is provided above the heating chamber on a vertical center of the turntable to be detected.

Further, the temperature detecting means is provided above the heating chamber vertically on the rotation axis of the turntable.

[0010] Further, the temperature detecting means is provided above the side wall of the heating chamber.

[0011] Further, a heating chamber for storing food, heating means for heating the food, and a square formed by dividing the bottom surface of the heating chamber into four equal parts are defined as a detection area unit. Temperature detecting means for detecting the temperature in the detected area unit by detecting infrared rays radiated from each divided area obtained by dividing a plurality of divided areas, a driving means for driving the temperature detecting means, and the driving means, A temperature distribution of the entire bottom surface is obtained by directing the temperature detecting means in each direction of a quadrangular shape formed by dividing the bottom surface of the heating chamber into four equal parts, and detecting a temperature of each of the detected area units. Control means for controlling the driving of the heating means and the driving means based on the distribution.

Also, a heating chamber for storing the food, heating means for heating the food, and a boundary line with another square adjacent to one of the squares formed by dividing the bottom surface of the heating chamber into four equal parts. Is a detected area unit, detects infrared rays emitted from each of the divided areas obtained by dividing the detected area unit into a plurality of areas, and detects another square adjacent to one of the squares. Temperature detecting means for detecting the temperature in the detected area unit, including the vicinity of the outside of the boundary line with the sensor, a driving means for driving the temperature detecting means, and a driving means for lowering the bottom surface of the heating chamber by four. A temperature distribution of the entire bottom surface is obtained by directing the temperature detecting means in each direction of the equally formed quadrangular shape and detecting a temperature of each of the detected area units. And and a control means for controlling driving of the driving means.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a configuration diagram of a thermopile module as a temperature detecting means of a high-frequency heating device and a control means thereof according to a first embodiment of the present invention.
Is an enlarged view of a thermopile unit of the thermopile module, FIG. 3 is a configuration diagram of a high-frequency heating device, and FIG. 4 is a diagram of an infrared detection area of the thermopile module. FIGS. 5 to 8 are temperature measurement explanatory diagrams for explaining the temperature measurement of the turntable every quarter rotation. 9 and 10 are configuration diagrams of the high-frequency heating device showing different installation positions of the thermopile module.

In FIGS. 1 and 2, reference numeral 2 denotes a thermopile unit in which 16 thermopiles are arranged in a 4 × 4 matrix, and 1Aa, 1Ab, 1Ac, 1Ad,
, 1Dd are thermopiles (hereinafter, when referring to any thermopile from 1Aa to 1Dd, it is referred to as "thermopile 1"). Reference numeral 3 denotes a condensing lens that is disposed in front of the thermopile unit 2 and condenses infrared rays radiated from a detected area 4 of a heating chamber of a high-frequency heating device described later on the thermopile unit 2.

On the other hand, 5 is scanning means for selecting an output signal from the thermopile 1 by an address signal described later, and 6 is 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 such as a thermistor disposed close to the cold junction of the thermopile 1. Reference numeral 8 denotes second amplifying means for amplifying an output signal from the reference temperature element 7 to a predetermined level. Reference numeral 9 denotes the signal amplified by the first amplification means 6 and the second
This is a differential amplifying means for comparing and amplifying the output signal amplified by the amplifying means 8 as an input. Here, 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. Is a thermopile module which is a temperature detecting means integrally formed with the condenser lens 3.

Reference numeral 11 denotes a scanning means 5 at a predetermined timing.
Address signal output means for outputting address signals of the thermopiles 1Aa to 1Dd, and A / D conversion means 12 for converting the voltage output of the differential amplifying means 9 into a digital signal.
Reference numeral 3 denotes temperature data conversion means for converting the digital signal output of the A / D conversion means 12 into temperature data, and reference numeral 14 denotes storage means for storing temperature data output from the temperature data conversion means 13, corresponding to 16 elements of the thermopile 1. It has a storage buffer. Reference numeral 15 denotes a timing setting means for setting a timing at which the temperature data of the temperature data conversion means 13 is stored in the storage means 14.
The timing of ／ cycle is set, and the temperature data of the temperature data conversion means 13 is stored in the storage means 14 every １ ／ cycle. Reference numeral 16 denotes a heating control unit that performs heating control based on the temperature distribution on the turntable 21 stored in the storage unit 14. 17 is an address signal output means 11, A / D
Conversion means 12, temperature data conversion means 13, storage means 1
4. A microcomputer (hereinafter referred to as a "microcomputer") which is a control means including the timing setting means 15 and the heating control means 16.

Next, the first embodiment configured as described above.
The operation of the thermopile module of the high-frequency heating device in the above will be described with reference to FIG. In FIG. 1, when a power switch (not shown) is turned on to energize the thermopile module 10 and the microcomputer 17, infrared rays radiated from the detection area 4 are collected by the condenser lens 3 and received by the thermopile unit 2. Is done. The temperature of the thermopile 1 of the thermopile unit 2 changes due to light reception, and the temperature difference generated at the hot junction and the cold junction of the thermocouple is converted into a voltage and output.

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 1Aa, based on the address signal output from the address signal output means 11, and outputs the selected signal to the first amplifying means. 6
Outputs the selected voltage to On the other hand, the reference temperature element 7 arranged near 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. The output voltages amplified by these amplifying means 6 and 8 are compared and amplified by the differential amplifying means 9, so that even if the ambient temperature changes, the temperature of the measured area can be accurately detected as a voltage value. it can.

The voltage compared / amplified by the differential amplifying means 9 is input to an A / D converting means 12 built in a microcomputer 17 to become a digital signal, and this digital signal is converted by a temperature data converting means 13 into a temperature signal. Storage means 14 for converting the data into temperature data of thermopile 1Aa
Is stored. The above operation is performed by thermopiles 1Aa to 1D.
The temperature data of all the thermopiles can be stored in the storage means 14 by sequentially performing the operations up to d 16 times.
At this time, the temperature data is stored by the timing setting means 15 for each quarter cycle of the turntable 21.

Next, the setting of the detection area in the high-frequency heating device of the thermopile module will be described with reference to FIGS. In FIG. 3, 10 is a thermopile module, 20 is a heating chamber of a heating chamber of a high-frequency heating device, 2
1 is a turntable on which the food 23 is placed and rotated, 22 is a driving means for rotating the turntable, 24 is a heating chamber 2
A magnetron that supplies microwaves to 0, a waveguide 25 that guides microwaves generated by the magnetron 24 to the heating chamber 20, an infrared detection area 26 that is a detection area unit of the thermopile module 10, and a thermopile module 27 that This is a peephole for viewing the heating chamber 20.

In FIG. 3, the microwave generated by the magnetron 24 is radiated to the heating chamber 20 via the waveguide 25. The turntable 21 places the food 23 thereon, and is rotated at a rotation speed determined by a motor of the driving means 22. Generally, this rotation cycle is about 10 to 12 seconds. In the description here, it is 12 seconds per round. The thermopile module 10 is inserted into the heating chamber 20 through the peephole 27 of the top plate on the center of the turntable.
Look into the bottom of the. In this case, the detection area of the thermopile unit 2 (in the thermopile module 10) is shown in FIG.
Is a detection area 26 shown in FIG. The detection area 26 is a quadrilateral with two radii adjacent to each other of a sector formed by dividing the turntable 21 into four equal parts.

FIG. 5A shows the same state as FIG. 4 except for the turntable 21, the food 23 and the detection area 26. FIG. 5B shows the detection area 26-1 currently being viewed and the detection areas 26-2, 2-2, 2
The area 26-3 before generation and the area 26-4 before generation 3 are shown. At present, since there is no food in the detection area, the temperature in the area is substantially uniform, and as a result, each element of the thermopile unit 2 has also obtained substantially the same temperature. These temperatures are stored in the storage means 14. Note that the first detection area 26 of the first rotation of the turntable 21 is, for example, 0.5 seconds later because the signal immediately after startup may be unstable.

Next, after the turntable 21 makes a quarter turn, the detection area 26 is again detected by the thermopile unit 2.
Get the temperature of The situation at this time is as shown in FIG.
FIG. 6A shows a state in which the food 23 is in the detection area 26, and FIG. 6B shows the thermopile unit 2 at that time.
Shows the acquisition temperature of each element. Here, for the sake of explanation, a dark color is referred to as a high temperature and a light color is referred to as a low temperature. However, in practice, a voltage for each temperature is output from each element, and is converted into a predetermined temperature after A / D conversion. 26Ca, 26 in the figure
The four elements Cb, 26Da, and 26Db indicate that the temperature is higher than the others, and among them, 26Cb indicates the highest temperature and 26Da indicates the lowest temperature. Also, the temperature information of the previous generation is moved to 26-2. Details will be described later.

FIG. 7 shows a state in which the turntable 21 makes a quarter turn. The food 23 has already escaped from the detection area 26, and only the turntable 21 is in the detection area. The temperature at this time is obtained in 26-1 in FIG. 7B, and each element has a substantially uniform temperature. The temperature of the previous generation is displayed in 26-2. In this case, the entire 4 × 4 area is rotated clockwise by 90 degrees to respond. Then, the temperature of each element can be stored in a form corresponding to the actual position of the food. In FIG. 6B, the turntable was not visible because the temperature of the turntable was uniform, but such processing is performed.

In FIG. 7B, the temperature of the second generation is similarly shown rotated by 90 degrees from the previous time in 26-3. The processing of this part is performed, for example, by preliminarily securing an 8 × 8 storage area in the storage means 14 in the microcomputer 17 and storing the first temperature information in the first 4 × 4 area of the storage area. At the time of storage after one rotation, the temperature of the first 4 × 4 area is rotated 90 degrees clockwise to be converted into a shape, then stored again in the next 4 × 4 area, and a new 4 × 4 area is stored in the first 4 × 4 area. This is possible and can be easily realized by using a microcomputer program that stores the temperature and repeats sequentially.

FIGS. 8 (a) and 8 (b) show the measurement after a quarter period. Similar processing is performed. This is repeated below. Then, when one round has been made, the previously obtained temperature is updated to the latest one. The temperature distribution of the entire turntable 21 can be acquired by repeating the acquisition of the temperature for each quarter cycle in this manner.

As described above, the operation of the thermopile module 10 of the high-frequency heating device has been described.
Based on the temperature distribution of the entire turntable 21 stored in the storage means 14 of the microcomputer 17, the output of the magnetron 24, the heating time, and the rotation of the turntable 21 are controlled to control the heating of the high-frequency heating device.

As described above, the temperature distribution of the entire turntable 21 can be obtained by repeatedly obtaining the temperature every quarter cycle. In this case, 4 × 4
With the thermopile module 10 having a resolution of, the temperature distribution on the turntable 21 can be viewed at a resolution of 8 × 8. Thus, the apparent resolution can be easily increased.

Further, since the measurement may be performed every quarter rotation, the number of times of measurement may be small. As a result, the load on the microcomputer can be reduced and the processing time can be given a margin, so that a low-performance, low-priced microcomputer can be used. In addition, since the boundaries of each measurement can be exactly aligned, all the temperature distribution on the turntable 21 can be obtained without fail. At this time, special processing for area adjustment is only required to rotate the area, and the load on the microcomputer can also be reduced here.

In this embodiment, the thermopile module 10 is formed on the top surface on the extension line of the turntable shaft.
As shown in the figure, the top surface in the vertical direction at the center of the detection area may be used.
Moreover, as shown in FIG. 10, it may be arranged on the side surface of the heating chamber 20. The case of FIG. 3 is excellent in that it can easily catch the temperature of the contents of the cup and the bottle in the center.
The case of FIG. 9 is excellent in that the size of the detection area of each element is the most uniform. This is because the detection area of each element increases in proportion to the square of the distance to the bottom surface, and the difference in the size is smallest when the element is arranged at the center. The case of FIG. 10 is particularly effective in the case of a so-called microwave oven in which the high-frequency heating device 20 also has an oven function. This is because the heater for the oven and the grill is installed on the top plate, so that the temperature becomes high. In the case of FIGS. 3 and 9, sufficient insulation measures must be taken and the cost is increased. In the case of (1), a relatively simple heat insulation measure is sufficient, so that the cost can be reduced.

In this embodiment, the upper right surface as viewed from the upper surface is used as the detection area. However, it goes without saying that the same effect can be obtained anywhere in the lower right, upper left, or lower left. Due to the installation space, the concept is the same even if the detection area is installed in another place, and the detection area may be slightly deformed, but almost the same effect can be obtained.

In this embodiment, the measurement is performed every quarter rotation, and the rotation period is generally about 10 to 12 seconds. If one turn is 10 seconds, a quarter rotation is 2.5 seconds, but a method may be adopted in which the temperature is acquired at finer intervals, for example, every 0.5 seconds, and a corresponding measurement is extracted from the temperature. Further, in this case, it becomes more convenient to obtain the rotation direction of the turntable 21 from the moving direction of the food, to start the measurement from the timing when the food comes to the center of the area, or to start the measurement from the timing when the food enters the area.

Embodiment 2 FIG. FIG. 11 is an infrared detection area diagram of a thermopile module that is a temperature detection unit of the high-frequency heating device according to the second embodiment. 12 to 15
FIG. 7 is a temperature measurement explanatory diagram for explaining that the turntable measures the temperature every quarter rotation. In the present embodiment, the boundary of the detection area 26 is installed such that the radius of the turntable 21 includes the center of the turntable and also includes the radius on both sides. In FIG. Is thermopile unit 2
This is a detection area (located in the thermopile module 10). FIG. 12A is a diagram similar to FIG.
1, the detection area 26, the turntable 21, and the food 23,
The detection area 26 is extracted. FIG. 12 (b)
Is a diagram schematically showing the temperature stored in the storage means 14 in the same manner.

FIG. 13 (a) shows the case where the temperature is obtained again after a quarter rotation from FIG. 12, and FIG. 13 (b) also shows the first embodiment.
In the same manner as above, the detection area of the previous generation is rotated by 90 degrees and sent. Hereinafter, FIGS. 14 and 15 are the same as those in the first embodiment, and thus description thereof will be omitted.

When the detection area 26 is installed so as to include the radius, for example, the 26S1 line in FIG.
In the measurement after the quarter rotation, the measurement is performed at exactly the same timing on the line 26S2 in FIG.
Therefore, by comparing the temperatures of the corresponding elements, 4
You can know how many times it has risen in one-half turn. Using this result, the temperature rise value for each quarter rotation is estimated, and when the memory is moved to the next 4 × 4 area in the storage means for each quarter measurement, the rise amount is calculated. Is added each time, it is possible to estimate and obtain the temperature rise during the time when measurement is not performed. This is convenient when, for example, a temperature distribution is displayed and shown. The installation position of the thermopile module 10 of the present embodiment is the same as that of the first embodiment.

Embodiment 3 FIG. FIG. 16 is an infrared detection area diagram of a thermo pie module which is a temperature detection unit of the high frequency heating device according to the third embodiment. In the present embodiment, the detection area 26 has a rectangular shape in which one end of a diagonal line is located at the rotation center of the turntable and the length of the diagonal line is equal to the radius of the turntable 21. In FIG. 16, 21 is a turntable, 23 is food, and 26 is a detection area of the thermopile unit 2.

In this configuration, while the turntable 21 makes one round, 1Ad of the thermopile unit 2 (FIG. 2)
The point at which the detected temperature of the element becomes maximum is set as the first screen, and the temperature is acquired every quarter cycle therefrom in the same manner as in the first embodiment. Then, even if the food is placed at the end, the detection can be performed without any omission, and furthermore, since the interval of each element is smaller than in the case of the first embodiment, the detection area 26 is set to be smaller than that of the first embodiment. Can also be finely divided. Therefore, a finer resolution can be obtained.

Embodiment 4 FIG. FIG. 17 is a configuration diagram of a high-frequency heating device according to the fourth embodiment, and FIG. 18 is an infrared detection area diagram of a thermo pie module. This embodiment has no turntable and drives a thermo pie module. 17, 10 is a thermopile module, 20 is a heating chamber of a high-frequency heating device, 23 is a food,
4 is a magnetron for transmitting high frequency, 25 is a waveguide for guiding microwaves to the heating chamber 20, 27 is a peephole of the thermopile module, 31 is driving means for driving the thermopile module 10, and 32 is a detection area of the thermopile unit 2. There is a square formed by dividing the bottom surface of the heating chamber 20 into four equal parts. In FIG. 18, 32-1 indicates the current detection area. The configuration of the thermopile module and its control means is the same as that of FIG. 1 of the first embodiment, but the target of the heating control means 16 is different.

In this configuration, V1 shown in FIG. 18 indicates the direction in which the first thermopile module 10 faces, and thereby the temperature of the detection area 32-1 is measured. Then, the thermopile module 10 is pointed in the direction of V2 by the driving means 31, and the temperature of the area 32-2 is detected. Then, the thermopile module 10 is set to V3, V4, again V1,.
, The entire area on the bottom surface of the heating chamber 20 is measured four times and stored in the storage means 14. Thereafter, the same operation is repeated.

The heating control means 16 of the microcomputer 17
Thus, based on the temperature distribution of the entire bottom surface of the heating chamber 20 stored in the storage unit 14 of the microcomputer 17,
The output of 4 and the heating time are controlled to control the heating of the high-frequency heating device.

As described above, by rearranging the obtained temperature information in the storage means 14, a resolution of 8 × 8 can be obtained by the thermopile module of 4 × 4 resolution, and the temperature at the bottom of the heating chamber can be obtained. The heating can be performed by easily measuring the entire range with a small number of measurements. In addition,
As in the second embodiment, a quadrilateral formed by dividing the bottom surface of the heating chamber 20 into four and including a boundary with another quadrilateral adjacent to one quadrilateral may be used as the detection area.

[0042]

As described above, according to the present invention, a heating chamber for storing food, a turntable provided at the bottom of the heating chamber for mounting and rotating the food, and a heating means for heating the food And a quadrilateral having two adjacent radii of both sides of a sector formed by dividing the turntable into four equal parts is a detected area unit, and the detected area unit is radiated from each divided area divided into a plurality. Temperature detecting means for detecting the temperature in the detected area unit by detecting infrared rays, and detecting the temperature of the detected area unit every quarter turn of the turntable by the temperature detecting means. The temperature distribution of the entire turntable is determined, and the heating means and the control means for controlling the rotation of the turntable based on the temperature distribution are provided. It is possible to obtain the temperature distribution of the turntable easily finer resolution.

The heating chamber for storing the food, a turntable provided at the bottom of the heating chamber for mounting and rotating the food, heating means for heating the food, and the turntable are divided into four equal parts. Adjacent two radii of the formed sector
A quadrilateral formed to be included in the side is defined as a detected area unit, and infrared rays emitted from each divided area obtained by dividing the detected area unit into a plurality are detected, including the vicinity of both radial outer sides of the sector. A temperature detecting means for detecting a temperature in the detected area unit; and a temperature detecting means for detecting the temperature of the detected area unit every quarter rotation of the turntable. And the control means for controlling the rotation of the turntable and the heating means based on the temperature distribution, so that the temperature distribution of the turntable can be easily obtained with a fine resolution with a small number of measurements. And a temperature rise other than the measurement point can be obtained.

Also, a heating chamber for storing the food, a turntable provided at the bottom of the heating chamber for mounting and rotating the food, a heating means for heating the food, and one end of a diagonal line which rotates the turntable. A square located at the center and having a diagonal length equal to the radius of the turntable is a detected area unit, and detects infrared rays emitted from each divided area obtained by dividing the detected area unit into a plurality. Temperature detecting means for detecting the temperature in the detected area unit; and detecting the temperature of the detected area unit every quarter turn of the turntable by the temperature detecting means, thereby detecting the temperature of the entire turntable. And a control means for controlling the rotation of the heating means and the turntable based on the temperature distribution. In, it is possible to obtain a temperature distribution of the turntable with finer resolution by easy.

Further, since the temperature detecting means is provided in the upper part of the heating chamber vertically above the center of the detected area of the turntable, the size of the element detecting area can be made substantially uniform.

Further, since the temperature detecting means is provided above the heating chamber on the vertical axis of the rotation axis of the turntable, it is possible to accurately detect the temperature of the contents of food placed at the center of the turntable.

Further, since the temperature detecting means is provided at the upper part of the side wall of the heating chamber, the installation position can have a certain width, and it is possible to flexibly deal with substrates, components and the like.

Further, the temperature distribution of the turntable can be easily obtained with a small number of measurements and a fine resolution.
A heating chamber for storing the food, a heating means for heating the food, and a square formed by dividing the bottom surface of the heating chamber into four equal parts are detected area units, and the inside of the detected area unit is divided into a plurality. Temperature detecting means for detecting the temperature in the detected area unit by detecting infrared rays radiated from each of the divided areas; driving means for driving the temperature detecting means; The temperature detection means is directed in each direction of a quadrangle formed by dividing the temperature into four, and the temperature distribution of the entire bottom surface is obtained by detecting the temperature of each of the detected area units, and based on the temperature distribution, Since the heating means and the control means for controlling the driving of the driving means are provided, it is possible to easily obtain the temperature distribution of the turntable with a fine resolution with a small number of measurements.

Also, a heating chamber for storing the food, a heating means for heating the food, and a boundary line with another square adjacent to one of the squares formed by dividing the bottom surface of the heating chamber into four equal parts Is a detected area unit, detects infrared rays emitted from each of the divided areas obtained by dividing the detected area unit into a plurality of areas, and detects another square adjacent to one of the squares. Temperature detecting means for detecting the temperature in the detected area unit, including the vicinity of the outside of the boundary line with the sensor, a driving means for driving the temperature detecting means, and a driving means for lowering the bottom surface of the heating chamber by four. A temperature distribution of the entire bottom surface is obtained by directing the temperature detecting means in each direction of the equally formed quadrangular shape and detecting a temperature of each of the detected area units. And so and a control means for controlling driving of the driving means, a small number of measurements, it is possible to obtain a temperature distribution of the turntable easily fine resolution.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a thermopile module according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a thermopile unit light-receiving element showing the first embodiment of the present invention.

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

FIG. 4 is an infrared detection area diagram of the thermopile unit according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating temperature measurement according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of temperature measurement according to the first embodiment of the present invention.

FIG. 7 is an explanatory diagram illustrating temperature measurement according to the first embodiment of the present invention.

FIG. 8 is an explanatory diagram of temperature measurement according to the first embodiment of the present invention.

FIG. 9 is a high-frequency heating apparatus according to Embodiment 1 of the present invention.

FIG. 10 is a high-frequency heating device according to the first embodiment of the present invention.

FIG. 11 is an infrared detection area diagram of a thermopile unit according to Embodiment 2 of the present invention.

FIG. 12 is an explanatory diagram illustrating temperature measurement according to the second embodiment of the present invention.

FIG. 13 is an explanatory diagram illustrating temperature measurement according to the second embodiment of the present invention.

FIG. 14 is an explanatory diagram illustrating temperature measurement according to the second embodiment of the present invention.

FIG. 15 is an explanatory diagram illustrating temperature measurement according to the second embodiment of the present invention.

FIG. 16 is an infrared detection area diagram of a thermopile unit according to Embodiment 3 of the present invention.

FIG. 17 is a configuration diagram of a high-frequency heating device according to a fourth embodiment of the present invention.

FIG. 18 is an explanatory diagram of temperature measurement showing Embodiment 4 of the present invention.

[Explanation of symbols]

1, 1Aa to 1Dd thermopile, 2 thermopile unit 10 thermopile module 14 storage means, 15 timing setting means 16 heating control means, 17 microcomputer, 20 heating chamber, 21
Turntable, 22 turntable driving means, 2
3 foods, 24 magnetrons, 26 detection areas, 3
1 Drive means.

Continuing on the front page (72) Inventor Masafumi Nagata 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Takayuki Hiramitsu 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. In-company (72) Inventor Takeshi Saito 1728-1 Koeda, Hanazono-cho, Osato-gun, Saitama Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Kazuhiro Kameoka 1728-1, Koeda, Hanazono-cho, Osato-gun, Saitama Inside the company (72) Inventor Yuji Hoshino 1728-1 Komaeda, Hanazono-cho, Osato-gun, Saitama Prefecture Inside Mitsubishi Electric Home Equipment Co., Ltd. Incorporated F term (reference) 3K086 AA07 BA08 BB02 BB08 CA04 CB04 CB06 CB15 CC01 CC06 CD11 CD19 DA02 3L086 AA04 BB08 BF07 CB06 CB08 CB10 CB16 CC03 CC07 CC10 CC12 CC14 DA20

Claims (8)

[Claims] 1. A heating chamber for storing food, a turntable provided at the bottom of the heating chamber for mounting and rotating the food, heating means for heating the food, and dividing the turntable into four equal parts. A quadrilateral with two radii of the formed sector adjacent to each other is defined as a detected area unit, and the detected area unit is detected by detecting infrared rays radiated from each of a plurality of divided areas in the detected area unit. Temperature detecting means for detecting the temperature in the inside of the turntable;
Control means for determining the temperature distribution of the entire turntable by detecting the temperature of the detected area unit for each rotation, and controlling the rotation of the heating means and the turntable based on the temperature distribution. A high-frequency heating device characterized by the following. 2. A heating chamber for storing food, a turntable provided at the bottom of the heating chamber for placing and rotating the food, heating means for heating the food, and dividing the turntable into four equal parts. A square formed so as to include both radii of the formed sector in two adjacent sides is defined as a detected area unit, and the detected area unit is divided into a plurality of sections to detect infrared rays radiated from each divided area. Temperature detecting means for detecting the temperature in the detected area unit, including the vicinity of the outer sides of the two radii of the sector, and 温度 of the turntable by the temperature detecting means.
Control means for determining the temperature distribution of the entire turntable by detecting the temperature of the detected area unit for each rotation, and controlling the rotation of the heating means and the turntable based on the temperature distribution. A high-frequency heating device characterized by the following. 3. A heating chamber for storing food, a turntable provided at the bottom of the heating chamber for placing and rotating the food, heating means for heating the food, and one end of a diagonal line rotating the turntable. A square located at the center and having a diagonal length equal to the radius of the turntable is a detected area unit, and detects infrared rays emitted from each divided area obtained by dividing the detected area unit into a plurality. Temperature detecting means for detecting the temperature in the detected area unit; and 1/4 of the turntable by the temperature detecting means.
Control means for determining the temperature distribution of the entire turntable by detecting the temperature of the detected area unit for each rotation, and controlling the rotation of the heating means and the turntable based on the temperature distribution. A high-frequency heating device characterized by the following. 4. The high-frequency heating apparatus according to claim 1, wherein the temperature detecting means is provided in an upper part of the heating chamber vertically above the center of the detection area of the turntable. 5. The high-frequency device according to claim 1, wherein the temperature detecting means is provided in an upper part of the heating chamber on a vertical axis of the rotation axis of the turntable. 6. The high-frequency device according to claim 1, wherein the temperature detecting means is provided on an upper portion of a side wall of the heating chamber. 7. A heating chamber for accommodating food, heating means for heating the food, and a square formed by dividing the bottom surface of the heating chamber into four equal parts to be a detection area unit. Temperature detecting means for detecting the temperature in the detected area unit by detecting infrared rays radiated from each of the divided areas obtained by dividing the plurality of divided areas; a driving means for driving the temperature detecting means; and A temperature distribution of the entire bottom surface is obtained by directing the temperature detecting means in each direction of a quadrangular shape formed by dividing the bottom surface of the heating chamber into four equal parts, and detecting a temperature of each of the detected area units. Control means for controlling the driving of the heating means and the driving means based on the distribution. 8. A heating chamber for storing food, a heating means for heating the food, and a boundary line between another square adjacent to one of the quadrangles formed by dividing the bottom surface of the heating chamber into four equal parts. Is a detected area unit, detects infrared rays emitted from each of the divided areas obtained by dividing the detected area unit into a plurality of areas, and detects another square adjacent to one of the squares. Temperature detecting means for detecting the temperature in the detected area unit, including the vicinity of the outside of the boundary line with the sensor, a driving means for driving the temperature detecting means, Aiming at the temperature detecting means in each direction of the equally formed quadrangles, detecting the temperature of each of the detected area units, obtaining the temperature distribution of the entire bottom surface, and based on the temperature distribution, the heating means And control means for controlling the driving of the fine said driving means, high-frequency heating device characterized by comprising a.