JP2002089847A - High frequency heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly efficient high frequency heater which can gauge the temperature of food accurately. SOLUTION: This high frequency heater is equipped with a heating chamber 17 which stores food 22, a magnetron 18 which heats the food 22 by generating high frequency, a power supply port 20 which irradiates the bottom of the heating chamber 17b with high frequency generated from the magnetron 18, and a thermopile array module 10 which gauges the temperature of the food 22 out of contact, and each temperature gauging region 4a is made smaller than the size of the power supply port 20.

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 apparatus, and more particularly to a high-frequency heating apparatus capable of correctly detecting a temperature during heating and having high efficiency.

[0002]

2. Description of the Related Art There has been disclosed a high-frequency heating apparatus characterized in that a power supply port for supplying high-frequency power is provided on a bottom surface of a lower portion of a heating chamber. As an example, there is a high-frequency heating apparatus shown in FIG. 14 and disclosed in Japanese Patent Application Laid-Open No. 11-287456.

In this high-frequency heating apparatus, a high-frequency generator 1
The high-frequency wave 107 generated in the heating chamber 102 propagates through the waveguide 106, and from the power supply surface 108 below the heating chamber 102,
And is directly irradiated from the center of the bottom surface of the object to be heated 101 on the mounting table 112. For this reason, most of the high-frequency energy is directly applied to the object to be heated 101 and is absorbed by the object to be heated 101 with high efficiency. Therefore, the object to be heated 101 can be heated with high efficiency, and the energy loss can be significantly reduced. The control unit 105 controls the high-frequency generator 3 based on the detection result of the weight and the shape of the article 1 to be heated by the physical quantity detection unit 104.

[0004] In addition, by directly irradiating high frequency from the center of the bottom surface of the object to be heated 101 to intensively heat the lower part of the object to be heated 101, the object to be heated 101 is made of a liquid such as milk or sake. In some cases, convection is generated and uneven heating is eliminated, and uniform heating can be performed as a whole. Furthermore, when the object to be heated 101 has a large bottom surface such as thawing, the central part of the object to be heated 101 is heated intensively, so that it is uniformly heated without the so-called run-away phenomenon such as end boiling. Can be.

[0005]

As described above, in the conventional high-frequency heating apparatus, the lower power supply can be made much more efficient than the side power supply of the heating chamber. There is an advantage that can be. However, there was a problem that the temperature of the food being heated could not be known correctly. Therefore, even if the heating is performed with high efficiency, the end point of the heating may not be properly captured, and the heating may be excessively performed, resulting in an energy loss. In addition, there is also a problem that the temperature during heating cannot be properly captured, and the process cannot be completed at a desired temperature.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and can correctly measure the temperature of food, correctly capture the end point of heating the food, and end the heating at a desired temperature.
An object is to obtain a high-efficiency high-frequency heating device.

[0007]

According to the present invention, there is provided a high-frequency heating apparatus comprising: a heating chamber for storing food; a high-frequency heating means for generating and heating the high-frequency food; and a high-frequency heating means provided on a bottom surface of the heating chamber. In a high-frequency heating device having a power supply port for irradiating the high-frequency wave emitted from, a temperature measuring means for measuring the temperature of the food in a non-contact manner is provided, and at least one temperature measurement area by the temperature measuring means is provided on the power supply port. And each of the temperature measurement areas is smaller than the size of the power supply port.

A heating chamber for storing the food; a turntable provided in the heating chamber for mounting and rotating the food; a high-frequency heating means for generating and heating the food; and a bottom surface of the heating chamber A high-frequency heating device having a power supply port for irradiating a high-frequency wave emitted from the high-frequency heating means, provided with a temperature measuring means for measuring the temperature of the food in a non-contact manner; At least one of the temperature measurement areas is provided on the power supply port, and each of the temperature measurement regions is smaller than the size of the power supply port.

The heating chamber for storing the food, high-frequency heating means for generating and heating the food at a high frequency, and a power supply port for irradiating the top surface of the heating chamber with the high frequency emitted from the high-frequency heating means. In the high-frequency heating device, provided a temperature measuring means for measuring the temperature of the food in a non-contact manner,
At least one temperature measurement area by the temperature measurement means is provided on the bottom surface of the heating chamber facing the power supply port, and each of the temperature measurement areas is smaller than the size of the power supply port.

Also, a heating chamber for storing the food, a turntable provided in the heating chamber for mounting and rotating the food, high-frequency heating means for generating and heating the food and heating, and a top of the heating chamber. In a high-frequency heating device having a power supply port for irradiating a high-frequency wave emitted from the high-frequency heating means on a surface, a temperature measuring means for measuring a temperature of the food in a non-contact manner is provided, and a temperature measurement area by the temperature measuring means is at least. At least one of the temperature measurement areas is provided on the upper surface of the turntable opposite to the power supply port, and each temperature measurement area is smaller than the size of the power supply port.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 is a configuration diagram of a thermopile array module of a high-frequency heating device according to Embodiment 1 of the present invention, FIG. 2 is an enlarged view of a thermopile unit, FIG. 3 is an enlarged view of a detection area, and FIG. 4 is a high-frequency heating device of the present embodiment. 5 is a view of the high-frequency heating device of FIG. 4 as viewed from above. This embodiment relates to setting of a temperature measurement region in the high-frequency heating device of the thermopile array module.

1 and 2, reference numeral 2 denotes a thermopile unit which is a non-contact temperature measuring means in which 16 thermopiles are arranged in a 4 × 4 matrix, and infrared rays radiated from an area 4 to be detected. Is detected. 2
a1, 2a2, 2a3,... 2a16 are thermopiles (hereinafter, when referring to an arbitrary thermopile from 2a1 to 2a16, it is referred to as "thermopile 2a"). One of the divided areas of the detection area 4 detected by the thermopile array module 10 is a thermopile 2a.
Respectively.

In FIG. 3, 4a1, 4a2, 4a3,...
4a16 is the thermopile 2a of the thermopile unit 2.
1, 2a2, 2a3,... 2a16 (hereinafter, any temperature measurement area from 4a1 to 4a16 is referred to as "temperature measurement area 4a"). The thermopile array module is also called a compound eye infrared sensor. Reference numeral 3 denotes a condensing lens that is disposed in front of the thermopile unit 2 and condenses infrared rays radiated from the detection area 4 onto 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 array module in which a condenser lens 3 is integrally formed.

Reference numeral 11 denotes a scanning means 5 at a predetermined timing.
Address signal output means for outputting address signals of the thermopiles 1a1 to 1a16, 12 A / D conversion means for converting the voltage output of the differential amplifying means 9 into digital signals, 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 corresponding to the 16 elements of the thermopile 1. Has a buffer. Reference numeral 15 denotes control means for controlling the rotation of the turntable and the oscillation and stop of the microwave. Reference numeral 16 denotes a microcomputer (hereinafter, referred to as “microcomputer”) that includes the external signal output unit 11, the A / D conversion unit 12, the temperature data conversion unit 13, and the storage unit 14.

FIG. 4 is a cross-sectional view of the high-frequency heating device.
FIG. 5 is a cross-sectional view as viewed from above, but FIG. 5 shows only the power supply port 20 and the detected area 4 in order to make the temperature measurement area 4a of the thermopile array module 10 easy to understand. 4 and 5, 17 is a heating chamber, 18 is a magnetron, 19 is a waveguide, 20 is a power supply port, 21 is a glass plate, 22 is food, 10 is a thermopile array module, and 4a is detected by the thermopile array module 10. Is a temperature measurement area corresponding to the thermopile 1 and corresponds to a monocular infrared sensor.

Next, the operation of the thermopile array module 10 and the microcomputer 16 will be described with reference to FIGS. In FIG. 1, when a power switch (not shown) is turned on to energize the thermopile array module 10 and the microcomputer 16, the detected area 4
The infrared radiation radiated from is collected by the condenser lens 3 and received by the thermopile unit 2. 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 2 a 1 by the address signal output from the address signal output means 11, and selects 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 and amplified by the differential amplifying means 9 is input to an A / D converting means 12 built in a microcomputer 16 to become a digital signal, and this digital signal is converted by a temperature data converting means 13 into a temperature signal. The data is converted into data and stored as temperature data of the thermopile 2a1.
Is stored. The above operation is performed by the thermopiles 2a1 to 2a1.
The temperature data of all the thermopiles is stored in the storage means 14 by sequentially performing the processing up to 6 times up to 6.

Next, an operation centering on setting of a temperature measurement region in the high-frequency heating device of the thermopile array module will be described with reference to FIGS.

In FIG. 4, a food 22 is placed on a glass plate 21 directly above a power supply port 20, and a magnetron 18 is oscillated to perform high-frequency heating. Since the microwave emitted from the power supply port 20 is directly applied to the food 22, the food 22 is efficiently heated. By the way, the temperature obtained by the thermopile array module 10 depends on each temperature measurement area 4a.
It becomes the average temperature of the whole. In other words, when the temperature measurement area 4a includes food and other food (for example, a bottom surface or a dish), the average temperature thereof is obtained, and the accurate food temperature cannot be captured. That is, in order to capture an accurate food temperature, the entire temperature measurement region 4a needs to be food.

On the other hand, the thermopile array module 10
As shown in FIG. 5, each of the temperature measurement areas 4 a is made smaller than the power supply port 20. As can be seen from FIG. 4, at least one or more of the temperature measurement areas 4a detects the temperature of only the food 22. In this way, if the food 22 to be heated is a food 22 of a cup or a small plate (about 5 cm in diameter) included in a small category, this is the power supply port 20.
When it is placed on the upper side, it can be seen that a temperature measurement area 4a that always detects only the temperature of the food 22 is formed. In other words, when the thermopile array module 10 is used, if the center of the detection area 4 is aligned with the vicinity of the center of the power supply port 20, the food 2 can be detected in any of the temperature measurement areas 4 a even if it is slightly shifted.
2 can be captured.

As described above, the temperature measured in each temperature measurement area 4a of the thermopile array module 10 is:
Each is stored in the storage device 14. And control means 15
Is the stored temperature of each temperature measurement area 4a.
When any one of them reaches a preset target temperature, the heating by the magnetron 18 is stopped.

As described above, since the food 22 is placed right above the power supply port 20 for the lower power supply, the food 22 is heated with high efficiency, and whether the desired temperature has been reached can be accurately known in real time, and the process ends at the desired temperature. And waste such as overheating can be eliminated. Further, since there are a plurality of temperature measurement areas 4a, it is easy to use the food 22 if it is placed near the center of the power supply port 20.

Embodiment 2 FIG. 6 is a cross-sectional view of a high-frequency heating device according to a second embodiment of the present invention, and FIG. 7 is a diagram of FIG. 6 as viewed from above, in which a power supply port 20 and a sensor are provided so that a temperature measurement region of the thermopile module can be easily understood. 2 shows only the temperature measurement region. In the figure, reference numeral 23 denotes a thermopile module (monocular infrared sensor) having a single temperature measurement area, and reference numeral 24 denotes a temperature measurement area. Other reference numerals are the same as those in the first embodiment, and a description thereof will not be repeated.

The monocular thermopile module 23 has the same temperature measurement region as the thermopile array module 10 of the first embodiment, and the description of the operation of the monocular thermopile module is omitted. In addition,
There is a feature that the cost is lower than that of the thermopile array module.

The temperature measurement area 24 of the thermopile module 23 is disposed immediately above the power supply port 20 with a size smaller than that of the power supply port 20. In FIG. 6, a food 22 is placed on a glass plate 21 directly above a power supply port 20, a magnetron 18 is oscillated, and high-frequency heating is performed. Since the microwave emitted from the power supply port 20 is directly applied to the food 22, the food 22 is efficiently heated.

The temperature acquired by the thermopile module 23 is the average temperature of the entire temperature measurement area 24 of the thermopile module 23. In other words, when the temperature measurement area 24 includes the food 22 and anything other than the food 22 (for example, a bottom surface or a dish), the average temperature thereof is acquired, and the accurate food temperature cannot be captured. In other words, to capture an accurate food temperature, the temperature measurement area 24
Must be the food 22 in its entirety. for that reason,
In the case of the monocular thermopile module 23, it is necessary to place the food 22 so that the temperature measurement area 24 is entirely included in the food 22 more carefully than in the case of the thermopile array module.
As a countermeasure, marking is made on the glass plate 21,
Alternatively, the problem can be solved by taking measures such as applying a spotlight and having the user surely place the device at that position.

On the other hand, the temperature measurement area 24 of the thermopile module 23 is arranged smaller than the power supply port 20, as shown in FIG. As can be seen from FIG. 6, the temperature measurement area 24 is
Only the temperature will be detected. As described above, if the food 22 to be heated is a cup or small dish (about 5 cm in diameter) that is included in a small category and is properly placed on the power supply port 20, only the temperature of the food 22 is obtained. It can be seen that is detected correctly. Then, when the detected temperature reaches the preset target temperature, the heating by the magnetron 18 is stopped.

As described above, since the food 22 is placed right above the power supply port 20 for the lower power supply, the food 22 is heated with high efficiency, and furthermore, it is possible to know in real time whether or not the desired temperature has been reached, and the process ends at the desired temperature. And waste such as overheating can be eliminated. In addition, since the thermopile module is a single-eye thermopile module, the food 22 must be properly centered in order to accurately measure the temperature of the food 22, but this is indicated by marking on the glass surface, etc. The cost can be reduced compared to the thermopile array module.

Embodiment 3 FIG. 8 is a cross-sectional view of a high-frequency heating apparatus according to Embodiment 3 of the present invention, and FIG. 9 is a view of FIG. 8 as viewed from above, and shows only a power supply port and a detection area. In the figure, 25 is a turntable, and 26 is a motor for rotating the turntable. Other reference numerals are the same as those in the first embodiment, and a description thereof will not be repeated.

Next, the operation will be described with reference to FIGS.
In FIG. 8, the food 22 is placed on the turntable 25 so as to pass right above the center of the power supply port 20 when the turntable 25 rotates. This can be easily realized by previously marking concentrically on a portion of the turntable 25 passing through the center of the power supply port 20. (Not shown)

Then, the magnetron 18 is oscillated while rotating the turntable 25 to perform high-frequency heating. The food 22 is heated by high frequency heating over time. Since the food 22 absorbs high frequency (microwave) as compared with the turntable 25, the temperature rises faster than the turntable 25, and becomes higher than the turntable 25.
The temperature measured when the food 22 reaches the temperature measurement area 4a increases. After a few laps from the start until the food 22 rises in temperature, for example, three laps, when the temperature of the temperature measurement area 4a in the figure rises in one cycle, the food 22 reaches the power supply port 20. Become. At this time, the turntable is stopped and high-frequency heating is continued. Then, when any one of the temperatures of the respective temperature measurement areas 4a reaches a preset target temperature, the magnetron 18
The heating by is stopped.

The temperature obtained by the thermopile array module 10 is the average temperature of the entire temperature measurement area 4a. That is, if the food 22 and the food 22 other than the food 22 (for example, the bottom surface or a dish) are included in the temperature measurement area 4a, the average temperature of the food 22 and the food 22 is obtained, and the accurate food temperature cannot be captured. That is, the entire temperature measurement area 4a needs to be the food 22 in order to capture an accurate food temperature.

On the other hand, the thermopile array module 10
As shown in FIG. 9, each of the temperature measurement areas 4 a is arranged smaller than the power supply port 20. As can be seen from FIG.
At least one of “a” detects the temperature of only the food 22. As described above, if the food 22 to be heated is the food 22 having a small size such as a cup or a small dish (about 5 cm in diameter), if the food 22 is placed on the power supply port 20, the temperature of the food 22 must be measured. It can be seen that there is an area for detecting. That is, in the case where the thermopile array module 10 is used, the food temperature can be captured in any area even if the food 22 is slightly displaced on the power supply port 20.

As described above, since the food 22 is placed immediately above the power supply port 20 for the lower power supply, the food 22 is heated with high efficiency, and furthermore, whether or not the desired temperature has been reached can be accurately determined in real time, and the process is completed at the desired temperature. And waste such as overheating can be eliminated. In this embodiment, the case where the rotation axis of the turntable 25 is disposed at the center of the bottom of the heating chamber 17 and the power supply port 20 is disposed at a position away from the center is shown. The power supply port 20 may be provided at the center by rotating the unit. Further, the thermopile array module 10 may be provided on the top surface of the heating chamber 17.

Embodiment 4 FIG. FIG. 10 is a cross-sectional view of a high-frequency heating device according to a fourth embodiment of the present invention, and FIG.
0 is a view from above, and shows only the power supply port 20 and the temperature measurement region. In the figure, 25 is a turntable, 26 is a motor for rotating the turntable, 23 is a monocular thermopile module (monocular infrared sensor) having one temperature measurement area, and 24 is a temperature measurement area. Other reference numerals are the same as those in the first embodiment, and a description thereof will not be repeated.

The monocular thermopile module 23 has the same temperature measurement region as the thermopile array module 10 of the first embodiment, and the description of the operation of the monocular thermopile module is omitted.

Next, the operation will be described with reference to FIGS. In FIG. 10, the food 22 is placed on the turntable 25 so as to pass right above the center of the power supply port 20 when the turntable 25 rotates. This is turntable 2
5 can be simplified by marking the portion passing through the center of the power supply port 20 concentrically in advance. (Not shown)

Then, the magnetron 18 is oscillated while rotating the turntable 25 to perform high-frequency heating. The food 22 is heated by high frequency heating over time. Since the food 22 absorbs high frequency (microwave) as compared with the turntable 25, the temperature rises faster than the turntable 25, and becomes higher than the turntable 25.
The temperature measured when the food 22 reaches the temperature measurement area 4a increases. After a few laps from the start until the food 22 rises in temperature, for example, three laps, when the temperature of the temperature measurement area 4a in the figure rises in one cycle, the food 22 reaches the power supply port 20. Become. At this time, stop the turntable and continue heating. And the temperature measurement area 24
When the temperature reaches a preset target temperature, the heating by the magnetron 18 is stopped.

The temperature acquired by the thermopile module 23 is the average temperature of the entire temperature measurement area 4a. That is, the food 22 and the food 22 are placed in the temperature measurement area 4a.
In the case where something other than the above (for example, a bottom surface or a dish) is included, the average temperature thereof is obtained, and the accurate food temperature cannot be captured. That is, the entire temperature measurement area 4a needs to be the food 22 in order to capture an accurate food temperature. Therefore, the monocular thermopile module 23
In the case of (1), it is necessary to place the temperature measurement area 24 so as to be entirely included in the food 22 more carefully than in the case of the thermopile array module. As a countermeasure, the problem is solved by making a mark on the glass plate 21 or applying a spotlight or the like, and ensuring that the glass plate 21 is placed at that position.

On the other hand, as shown in FIG. 11, the temperature measurement area 24 of the thermopile module 23 is arranged smaller than the power supply port 20. FIG.
As can be seen from 0, the temperature measurement area 24 detects the temperature of the food 22 alone. As described above, it can be seen that only the temperature of the food 22 is properly detected in the case of the food 22 to be heated ordinarily, such as a cup or a small dish (about 5 cm in diameter) included in a small category. Then, when the detected temperature reaches the preset target temperature, the heating by the magnetron 18 is stopped.

As described above, the food 22 is heated with high efficiency by coming directly above the power supply port 20 of the lower power supply, and furthermore, it is possible to accurately know in real time whether or not the desired temperature has been reached, and it is possible to finish at the desired temperature. It is possible to eliminate waste such as overheating. In addition, because of the monocular thermopile module 23, the food 22 needs to be properly placed in a designated place in order to properly measure the temperature of the food 22, but this is indicated by marking on the turntable 25, etc. It can be solved by having the user place it properly, and the cost can be reduced compared to the thermopile array module.

Embodiment 5 FIG. In the present embodiment, a power supply port is provided above a heating chamber. FIG. 12 is a cross-sectional view of a high-frequency heating device according to Embodiment 5 of the present invention. In the figure, 23 is a thermopile module, and 24 is a temperature measurement area of the sensor. Other reference numerals are the same as those in the third embodiment, and a description thereof will be omitted.

In FIG. 12, when the turntable 25 rotates the food 22, the food 22 passes just below the center of the power supply port 20 provided above the heating chamber 17.
put on top. This is the power supply port 2 on the turntable 25
This can be simplified by marking the portion passing through the center of 0 concentrically in advance. (Not shown)

Then, the magnetron 18 is oscillated while rotating the turntable 25 to perform high-frequency heating. The food 22 is heated by high frequency heating over time. Since the food 22 absorbs high frequency (microwave) as compared with the turntable 25, the temperature rises faster than the turntable 25, and becomes higher than the turntable 25.
The temperature measured when the food 22 reaches the temperature measurement area 4a increases. After a few laps from the start until the food 22 rises in temperature, for example, three laps, when the temperature of the temperature measurement area 4a in the figure rises in one cycle, the food 22 reaches the power supply port 20. Become. At this time, the turntable is stopped and high-frequency heating is continued. Then, when any one of the temperatures of the respective temperature measurement areas 4a reaches a preset target temperature, the magnetron 18
The heating by is stopped.

The temperature obtained by the thermopile array module 10 is the average temperature of the entire temperature measurement area 4a. That is, if the food 22 and the food 22 other than the food 22 (for example, the bottom surface or a dish) are included in the temperature measurement area 4a, the average temperature of the food 22 and the food 22 is obtained, and the accurate food temperature cannot be captured. That is, the entire temperature measurement area 4a needs to be the food 22 in order to capture an accurate food temperature.

On the other hand, the thermopile array module 10
As shown in FIG. 12, since each of the temperature measurement regions 4a is arranged smaller than the power supply port 20, at least one of the temperature measurement regions 4a has a temperature of only the food 22. Will be detected. As described above, if the food 22 to be heated is a food 22 having a small size such as a cup or a small dish (about 5 cm in diameter), and if the food 22 is placed on the power supply port 20, the food 2 is always required.
It can be seen that there is an area for detecting only the temperature of No. 2.
That is, in the case where the thermopile array module 10 is used, the food temperature can be captured in any area even if the food 22 is slightly displaced on the power supply port 20.

As described above, since the food 22 is placed immediately below the power supply 20 of the upper power supply, the food 22 is heated with high efficiency, and furthermore, whether or not the desired temperature has been reached can be accurately determined in real time, and the process is completed at the desired temperature. And it is possible to eliminate waste such as excessive heating.

Although not shown, the turntable 25
In the case where there is no and the bottom is only a glass plate, the glass plate may be marked and the food 22 may be placed on that portion. Further, in the present embodiment, the case where the rotation axis of the turntable 25 is disposed at the center of the bottom of the heating chamber 17 and the power supply port 20 is disposed at a position away from the center has been described. The power supply port 20 may be provided at the center by rotating the unit. Further, the thermopile array module 10 may be provided on the top surface of the heating chamber 17.

Embodiment 6 FIG. In the present embodiment, a power supply port is provided above a heating chamber. FIG. 13 is a sectional view of a high-frequency heating device according to Embodiment 6 of the present invention. In the figure, 23 is a thermopile module, and 24 is a temperature measurement area of the sensor. Other reference numerals are the same as in the fifth embodiment, and a description thereof will be omitted.

In FIG. 13, when the turntable 25 rotates the food 22, it passes under the center of the power supply port 20 disposed above the heating chamber 17.
put on top. This is the power supply port 2 on the turntable 25
This can be done by marking the portion passing through the center of 0 concentrically in advance (not shown).

Then, the magnetron 18 is oscillated while rotating the turntable 25 to perform high-frequency heating. The food 22 is heated by high frequency heating over time. Since the food 22 absorbs high frequency (microwave) as compared with the turntable 25, the temperature rises faster than the turntable 25, and becomes higher than the turntable 25.
The temperature measured when the food 22 reaches the temperature measurement area 4a increases. After a few laps from the start until the food 22 rises in temperature, for example, three laps, when the temperature of the temperature measurement area 4a in the figure rises in one cycle, the food 22 reaches the power supply port 20. Become. At this time, stop the turntable and continue heating. And the temperature measurement area 24
When the temperature reaches a preset target temperature, the heating by the magnetron 18 is stopped.

The temperature acquired by the thermopile module 23 is the average temperature of the entire temperature measurement area 4a. That is, the food 22 and the food 22 are placed in the temperature measurement area 4a.
In the case where something other than the above (for example, a bottom surface or a dish) is included, the average temperature thereof is obtained, and the accurate food temperature cannot be captured. That is, the entire temperature measurement area 4a needs to be the food 22 in order to capture an accurate food temperature. Therefore, the monocular thermopile module 23
In the case of (1), it is necessary to place the temperature measurement area 24 so as to be entirely included in the food 22 more carefully than in the case of the thermopile array module. As a countermeasure, the problem is solved by making a mark on the glass plate 21 or applying a spotlight or the like, and ensuring that the glass plate 21 is placed at that position.

On the other hand, the temperature measurement area 24 of the thermopile module 23 is smaller than the power supply port 20 as shown in FIG. As described above, it can be seen that only the temperature of the food 22 is properly detected in the case of the food 22 to be heated ordinarily, such as a cup or a small dish (about 5 cm in diameter) included in a small category. Then, when the detected temperature reaches the preset target temperature, the heating by the magnetron 18 is stopped.

As described above, the food 22 is heated with high efficiency by coming directly above the power supply port 20 of the lower power supply, and furthermore, it is possible to accurately know in real time whether or not the desired temperature has been reached, and to end at the desired temperature. It is possible to eliminate waste such as overheating. In addition, because of the monocular thermopile module 23, the food 22 needs to be properly placed in a designated place in order to properly measure the temperature of the food 22, but this is indicated by marking on the turntable 25, etc. It can be solved by having the user place it properly, and the cost can be reduced compared to the thermopile array module.

Although not shown, in the case where there is no turntable and only the glass plate is provided on the bottom surface, the glass plate may be marked and the food 22 may be placed on that portion.

[0058]

As described above, according to the present invention, the heating chamber for accommodating the food, the high-frequency heating means for generating and heating the high-frequency food, and the high-frequency heating means provided on the bottom surface of the heating chamber. In a high-frequency heating device having a power supply port for irradiating the high-frequency wave, a temperature measurement unit for measuring the temperature of the food in a non-contact manner is provided, and a temperature measurement region by the temperature measurement unit is provided on at least one or more of the power supply port. In addition, since each of the temperature measurement regions is smaller than the size of the power supply port, the temperature of the food can be measured correctly, and the food can be heated with high efficiency.

A heating chamber for accommodating the food, a turntable provided in the heating chamber for mounting and rotating the food, a high-frequency heating means for generating and heating the high-frequency food, and a bottom surface of the heating chamber A high-frequency heating device having a power supply port for irradiating a high-frequency wave emitted from the high-frequency heating means, provided with a temperature measuring means for measuring the temperature of the food in a non-contact manner; Since at least one of the power supply ports is provided on the power supply port and each of the temperature measurement areas is smaller than the size of the power supply port, the temperature of the food can be measured correctly, and the food can be heated with high efficiency.

The heating chamber for storing the food, high frequency heating means for generating and heating the food by high frequency, and a power supply port for irradiating the high frequency emitted from the high frequency heating means to the top surface of the heating chamber. In the high-frequency heating device, provided a temperature measuring means for measuring the temperature of the food in a non-contact manner,
Since the temperature measurement area by the temperature measurement means is provided on the bottom surface of the heating chamber facing at least one or more of the power supply ports, and each of the temperature measurement areas is smaller than the size of the power supply port, the temperature of the food is reduced. Measurement can be performed correctly and heating can be performed with high efficiency.

Further, a heating chamber for storing the food, a turntable provided in the heating chamber for mounting and rotating the food, high-frequency heating means for generating and heating the food and heating, and a top of the heating chamber. In a high-frequency heating device having a power supply port for irradiating a high-frequency wave emitted from the high-frequency heating means on a surface, a temperature measuring means for measuring a temperature of the food in a non-contact manner is provided, and a temperature measurement area by the temperature measuring means is at least. At least one of the temperature measurement areas is provided on the upper surface of the turntable facing the power supply port, and each of the temperature measurement areas is smaller than the size of the power supply port, so that the temperature of the food can be accurately measured, and the heating can be performed with high efficiency. .

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a thermopile array module of a high-frequency heating device according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged view of a thermopile unit light-receiving element portion of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 3 is an enlarged view of a detection area of the thermopile array module of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 5 is a transverse cross-sectional view of a lower portion of the high-frequency heating device according to the first embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a high-frequency heating device according to Embodiment 2 of the present invention.

FIG. 7 is a cross-sectional view of a lower portion of a high-frequency heating device according to Embodiment 2 of the present invention.

FIG. 8 is a longitudinal sectional view of a high-frequency heating device according to Embodiment 3 of the present invention.

FIG. 9 is a cross-sectional view of a lower portion of a high-frequency heating device according to Embodiment 3 of the present invention.

FIG. 10 is a longitudinal sectional view of a high-frequency heating device according to Embodiment 4 of the present invention.

FIG. 11 is a cross-sectional view of a lower portion of a high-frequency heating device according to Embodiment 4 of the present invention.

FIG. 12 is a longitudinal sectional view of a high-frequency heating device according to Embodiment 5 of the present invention.

FIG. 13 is a longitudinal sectional view of a high-frequency heating device according to Embodiment 6 of the present invention.

FIG. 14 is a longitudinal sectional view of a conventional high-frequency heating device.

[Explanation of symbols]

10 thermopile array module, 17 heating chamber,
18 magnetron, 19 waveguide, 20 power supply port, 2
1 glass plate, 22 food, 23 thermopile module, 24 temperature measurement area, 25 turntable.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H05B 6/72 H05B 6/72 D (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 Corporation (72) Inventor Yoshitaka Maemura 1728-1 Komaeda, Hanazono-cho, Osato-gun, Saitama Mitsubishi Inside Electric Home Equipment Co., Ltd. F-term in Electric Home Equipment Co., Ltd. (reference) 3K086 AA01 AA08 BA08 BB02 CA03 CA04 CB02 CB04 CB06 CB15 CC01 CC06 CD04 CD11 CD19 D A05 DA11 3K090 AA01 AA02 AB02 BA01 BB01 CA01 DA01 DA16 DA19 EA01 EB02 EB04 EB13 EB14 EB16 EB19 EB29 3L086 AA04 BA08 BB04 BB05 CB06 CB17 DA06 DA12 DA29

Claims (4)

[Claims] 1. A high frequency having a heating chamber for storing food, high frequency heating means for generating and heating the high frequency food, and a power supply port for irradiating the high frequency emitted from the high frequency heating means on the bottom surface of the heating chamber. In the heating device, a temperature measuring unit that measures the temperature of the food in a non-contact manner is provided, and at least one or more temperature measuring regions by the temperature measuring unit are provided on the power supply port, and the temperature measurement regions are connected to the power supply port. A high frequency heating device characterized in that the size is smaller than the size of the high frequency heating device. 2. A heating chamber for storing food, a turntable provided in the heating chamber for mounting and rotating the food,
High frequency heating means for generating high frequency and heating the food,
And a high-frequency heating device having a power supply port for irradiating high frequency emitted from the high-frequency heating means to a bottom surface of the heating chamber, wherein a temperature measuring means for measuring the temperature of the food in a non-contact manner is provided; A high-frequency heating apparatus, wherein at least one or more measurement areas are provided on the power supply port, and each of the temperature measurement areas is smaller than the size of the power supply port. 3. A heating chamber for storing food, a high-frequency heating means for generating and heating the food at a high frequency, and a power supply port for irradiating the top surface of the heating chamber with the high frequency emitted from the high-frequency heating means. In the high-frequency heating device, a temperature measurement unit for measuring the temperature of the food in a non-contact manner is provided, and a temperature measurement region by the temperature measurement unit is provided on a bottom surface of the heating chamber facing at least one or more of the power supply ports, The high-frequency heating device, wherein each of the temperature measurement areas is smaller than the size of the power supply port. 4. A heating chamber for storing food, a turntable provided in the heating chamber for mounting and rotating the food,
High frequency heating means for generating high frequency and heating the food,
And a high-frequency heating device having a power supply port for irradiating a high frequency emitted from the high-frequency heating means to a top surface of the heating chamber, wherein a temperature measuring means for non-contactly measuring the temperature of the food is provided; A high-frequency heating apparatus, wherein at least one temperature measurement area is provided on the upper surface of the turntable facing the power supply port, and each of the temperature measurement areas is smaller than the size of the power supply port.