JP2000315575A - High-frequency heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate uneven heating workmanship of an object to be heated in a high frequency heating device by varying the distribution of microwaves in the heating chamber. SOLUTION: A high frequency heating device is composed of a high frequency wave generating means 11, a heating chamber 13 to store an object to be heated, a turntable 14 whereon the object heated is placed, a turntable support 15 to support the turntable 14, a first driving means 16 to rotate the support 15, an aperture 18 provided in a wall surface 19 to form the heating chamber 13, a groove 20 ending at the aperture 18, an impedance varying means 21 to vary the impedance of the aperture 18 provided in the groove 20, and a second driving means 22 to drive the means 21, whereby the distribution of the microwaves is changed by disturbing the high frequency current in the wall surface 19 of the chamber 13 by the means 21, and thereby unevenness in the heating of the object can be eliminated.

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 for heating an object to be heated such as food.

[0002]

2. Description of the Related Art A conventional high-frequency heating apparatus will be described with reference to the drawings. FIG. 10 is a schematic configuration diagram of the high-frequency heating device. 1 is a main body of a high-frequency heating device, 2 is a magnetron (high-frequency generation means) for generating a microwave, 3 is a waveguide for guiding a microwave generated from the magnetron, 4 is a heating chamber for accommodating an object to be heated such as food, 5 is A turntable (mounting table) 6 on which an object to be heated is mounted is a turntable support for supporting the turntable 5. Reference numeral 7 denotes a motor for rotating the turntable support 6, and reference numeral 8 denotes control means for controlling the magnetron 2 and the motor 7.

In the case of heating, an object to be heated such as food is placed on a turntable, and a phenomenon in which moisture contained in the object to be heated absorbs microwaves and self-heats is used.

[0004] In a heating chamber of a conventional high-frequency heating device, a microwave radiated from a high-frequency generator into the heating chamber generates a standing wave. Since the distribution of microwaves in the heating chamber generated by the standing wave hardly changes, the object to be heated in the region with high microwave intensity is easily heated, and the object to be heated in the region with low microwave intensity is not easily heated. . Therefore, uneven heating occurs in the object to be heated.

[0005] In the prior art, a method of rotating a turntable, changing a height, and the like are employed to change a state of microwaves applied to an object to be heated.

[0006]

However, in the prior art, the method of rotating the turntable cannot change the distribution of microwaves in the heating chamber, and the object to be heated has a constant microwave distribution. Is heated while repeatedly passing through, the heating area of the object to be heated is concentrically generated. In addition, since the intensity of the microwave applied to the object to be heated cannot be changed, there is a problem that a region having a high microwave intensity is excessively heated and a region having a low microwave intensity is insufficiently heated.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a high-frequency heating apparatus that changes the distribution of microwaves generated in a heating chamber and eliminates uneven heating of an object to be heated.

[0008]

In order to solve the above-mentioned problems, a high-frequency heating apparatus according to the present invention comprises a heating chamber for accommodating an object to be heated, and a mounting chamber provided in the heating chamber for mounting the object to be heated. A mounting table, and a first driving unit that rotationally drives the mounting table,
A high-frequency generating means for generating high-frequency waves radiated into the heating chamber, a power supply port for radiating the high-frequency waves generated by the high-frequency generating means to the heating chamber, an opening provided on a wall surface forming the heating chamber, A groove having an opening as one end,
An impedance variable means provided in the groove for varying the impedance of the aperture, and a second driving means for driving the impedance variable means.

The distribution of the microwaves in the heating chamber can be changed by changing the flow of the high-frequency current on the wall surface by the impedance variable means.

This makes it possible to eliminate uneven heating of the object to be heated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-frequency heating apparatus according to the present invention comprises, as described in claim 1, a heating chamber for storing an object to be heated, a mounting table provided in the heating chamber and for mounting the object to be heated, A first driving unit that rotationally drives the mounting table, a high-frequency generating unit that generates a high frequency radiated into the heating chamber, a power supply port that radiates the high frequency generated by the high-frequency generating unit to the heating chamber, and the heating chamber. An opening provided on the wall surface forming the opening, a groove having the opening as one end, an impedance variable means provided in the groove to vary the impedance of the opening, and a driving means for driving the impedance variable means. And two driving means.

The distribution of the microwaves in the heating chamber can be changed by changing the flow of the high-frequency current on the wall surface having the opening by the impedance variable means. Thereby, uneven heating of the object to be heated can be eliminated.

The high-frequency heating apparatus according to the present invention is characterized in that
As described, a heating chamber for storing the object to be heated, a mounting table provided in the heating chamber for mounting the object to be heated, first driving means for rotating and driving the mounting table, and radiation into the heating chamber. High-frequency generating means for generating high-frequency waves, a power supply port for radiating the high-frequency waves generated by the high-frequency generating means to the heating chamber, an opening provided on a wall surface forming the heating chamber, and one end of the opening. A groove portion, an impedance variable means provided in the groove portion and varying the impedance of the opening portion, a second drive means for driving the impedance variable means, and a detection means for detecting the amount of the object to be heated, And a control means for controlling at least one of the high-frequency generation means, the first driving means, and the second driving means based on a detection signal of the detection means.

Then, at least one of the high-frequency generating means, the first driving means for driving the mounting table, and the second driving means for driving the impedance varying means is controlled in accordance with the amount of the object to be heated. The intensity of the irradiated microwave or the microwave distribution in the heating chamber is controlled. Thus, the object to be heated can be optimally heated according to the amount of the object to be heated.

The high-frequency heating apparatus according to the present invention is characterized in that:
As described, the impedance variable means is configured to be driven to rotate, angle determination means for determining the rotation angle of the impedance variable means is added, and the control means detects the amount of the object to be heated based on a detection signal of the detection means. And controlling the second driving means so as to stop the variable impedance means at a predetermined rotation angle.

Then, the rotation angle of the dielectric plate is controlled by detecting the amount of the object to be heated, and the intensity of the microwave applied to the object to be heated or the microwave distribution in the heating chamber is controlled to optimal conditions. be able to. Thereby, the object to be heated can be efficiently heated with the optimum microwave intensity or the optimum microwave distribution according to the object to be heated.

The high-frequency heating device according to the present invention is characterized in that:
As described above, the mounting table is characterized in that the height from the bottom surface of the heating chamber can be changed.

By changing the height of the mounting table, the intensity of the microwave applied to the object to be heated and the heating distribution of the object to be heated can be changed. This allows
It is possible to eliminate uneven heating of the object to be heated.

The high-frequency heating device according to the present invention is characterized in that:
As described, a shape selection key for designating the shape of the object to be heated is added, and the second driving unit is controlled based on information from the shape selection key and a detection signal of a detection unit for detecting an amount of the object to be heated. It is characterized by controlling.

Then, based on the information from the shape selection key and the amount detection means, the control means extracts an optimum heating method for the object to be heated. By controlling the impedance variable means based on the extracted heating control method to change the microwave distribution in the heating chamber, it is possible to execute optimal heating according to the shape of the object to be heated.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Embodiment 1) FIG. 1 is a schematic configuration diagram of a high-frequency heating apparatus showing a first embodiment of the present invention, and FIG. 2 is an external view of the high-frequency heating apparatus of FIG. 1 and 2, reference numeral 10 denotes a high-frequency heating device main body, 11 denotes a magnetron (high-frequency generation means) for generating a microwave, 12 denotes a waveguide for guiding the microwave from the magnetron 11, and 13 denotes a heating for housing an object to be heated. In the room, the walls are made of metal. 1
4 is a turntable (mounting table) on which an object to be heated is mounted, 1
5 is a turntable supporting the turntable 14,
Reference numeral 16 denotes a motor (first driving means) that rotationally drives the turntable support 15. Reference numeral 17 denotes a power supply port for radiating the microwave generated from the magnetron 11 into the heating chamber 13. Reference numeral 18 denotes an opening provided on a wall surface 19 in the heating chamber 13, and reference numeral 20 denotes a groove having the opening 18 as one end. Numeral 21 denotes an impedance varying means for varying the impedance of the opening 18 and is constituted by a dielectric plate 21a.

The dielectric plate 21a is preferably made of a low dielectric loss material (for example, alumina, mullite or the like) having a relative permittivity of 5 or more, and has protrusions at both ends, and is fitted into a hole provided in the groove 20. It is supported for rotation. Reference numeral 22 denotes a motor (second driving means) for driving the dielectric plate 21a. The method of driving the dielectric plate 21a may be such that the dielectric plate 21a is rotated stepwise by a predetermined angle or may be continuously rotated. 23 is a control means for controlling the magnetron 11.

Next, the operation of the above configuration will be described.
When heating the object to be heated, the object to be heated such as food is placed on the turntable 14. Heating information is sent to the control means 23 from a heating switch or the like. Control means 2 based on heating information
3 sends a signal to the magnetron 11 and the motor 16. The magnetron 11 generates a microwave according to the signal of the control means 23, and the motor 16 drives the turntable support 15 to rotate. The turntable support 15 has an axis at the center of the bottom surface, and rotates about the axis. Magnetron 11
The microwave generated from the light propagates through the waveguide 12 and is radiated from the power supply port 17 into the heating chamber 13.

The operation of the dielectric plate 21a during heating may be constantly rotating, may be stopped at a certain rotation angle for a certain period of time, or may be repeatedly rotated and stopped. The depth of the groove 20 is such that the rotating plate 21 a
Perpendicular to the bottom surface (the rotation angle at this time is assumed to be 0 °)
In this case, the impedance generated in the opening 18 is determined to be an extremely small value (ideally, zero).
Therefore, when the rotation angle of the dielectric plate 21a is 0 °, a high-frequency current flows on the wall surface 19, and the microwave distribution in the heating chamber 13 has the same distribution as when the opening 18 is not provided on the wall surface 19. Occurs. On the other hand, when the direction of the dielectric plate 21 a is horizontal to the bottom surface of the heating chamber 13 (the rotation angle at this time is 90 °), the impedance of the opening 18 becomes a large value and the high-frequency current flowing through the wall surface 19 becomes large. Is disturbed. Therefore, the microwave distribution in the heating chamber 13 is
A distribution different from the case where no is provided is generated. That is, when the rotation angle of the dielectric plate 21a is changed, the opening 1
8, the distribution of microwaves in the heating chamber 13 changes.

In this embodiment, the method of expressing the rotation angle of the dielectric plate 21a is as follows.
The angle between the heating chamber wall surface 19 and the upper half of the dielectric plate 21a when rotated in the direction inclining toward the third side.

In FIGS. 1 and 2 of this embodiment, the rotation angle of the dielectric plate 21a is 0 °. Opening 1
8 is arranged so that the major axis direction is parallel to the depth direction, but the aperture 18 may be arranged so that the major axis direction is parallel to the height direction. Further, the opening 18 and the impedance variable means 21 may be provided anywhere on the wall surface of the heating chamber 13 or a plurality of them may be provided.

Since the turntable support 15 rotates about an axis, an object to be heated such as food is heated concentrically.
In addition, since the object to be heated is more likely to be heated in the region where the microwaves are concentrated, in order to eliminate uneven heating of the object to be heated, in addition to rotating the turntable 14, the microwave distribution is changed to change the microwave distribution. The rotation angle of the dielectric plate 21a is controlled to change the position where the wave intensity is strong.

In this embodiment, the ad hair paste 200g
Is placed in a container having a bottom surface of 100 mm × 100 mm and heated as an object to be heated, the temperature distribution of the object to be heated when the turntable support 15 is rotated with the rotation angle of the dielectric plate 21a fixed at 0 °, FIG. 3 shows the results of the temperature distribution of the object to be heated when the rotation angle of the dielectric plate 21a is changed to both 0 ° and 90 ° and the turntable support 15 is rotated.

In the schematic diagram of the rotation angle of the dielectric plate 21a in FIG. 3, the heating chamber 13 is located on the right side of the dielectric plate 21a. Further, the temperature distribution indicates that as the color becomes lighter, the temperature becomes higher.

As described above, by changing the rotation angle of the dielectric plate 21a, the temperature distribution of the object to be heated can be changed only when the turntable is used (ie, when the rotation angle of the dielectric plate 21a is 0 °). More uniform.

This makes it possible to eliminate uneven heating of the object to be heated.

(Embodiment 2) Next, a second embodiment of the present invention will be described.

FIG. 4 is a schematic configuration diagram of a high-frequency heating apparatus according to a second embodiment of the present invention. In FIG. 4, the configuration different from FIG. 1 is an amount detecting means 24 for detecting the amount of the object to be heated.
It is the point that was arranged. The amount detecting means 24 is provided so as to be linked with a drive shaft of a motor 16 for rotatingly driving the turntable support 15. Further, a detection signal of the amount detecting means 24 is input to the control means 23. In FIG. 4, FIG.
Parts having the same or equivalent functions as those shown in FIG.

The control means 23 controls at least one of the magnetron 11, the motor 16, and the motor 22 according to the signal of the quantity detecting means 24. The magnetron 11 generates a microwave with a predetermined microwave output in accordance with a signal from the control means 23, and supplies driving power to a motor 16 which rotates the turntable support 15. The control means 23
Supplies the driving power to the motor 22 that rotates the dielectric plate 21a, and controls the rotation of the dielectric plate 21a.

Next, in the above configuration, the magnetron 11
The output control method will be described. When heating the object to be heated with a microwave output suitable for a case where the amount of the object to be heated is large, if the amount of the object to be heated is small, the object may be overheated. Conversely, when heating with microwave output suitable for the case where the amount of the object to be heated is small,
When the amount of the object to be heated is large, there is a possibility that the time required for heating becomes long or the heating becomes insufficient. Therefore, when the amount of the object to be heated is large, the output of the microwave is increased, and when the amount of the object to be heated is small, the control is performed so as to decrease the output of the microwave.

When the impedance of the wall surface 19 is changed, the microwave input to the object to be heated changes. When the amount of the object to be heated is large, heating is performed at a rotation angle at which the input of the microwave to the object to be heated is large, and when the amount of the object to be heated is small, the input of the microwave to the object to be heated is small. The dielectric plate is controlled to heat at a rotation angle.

In this embodiment, when the magnetron is adjusted so that the microwave input to the object to be heated (600 g of water) is maximized when the rotation angle of the dielectric plate 21a is 0 °, the object to be heated is 200 g when the rotation angle of the dielectric plate 21a is 0 °, 45 °, 90 ° when
Experimental results of input change to water of 0g and 600g (Fig. 5)
Shown in

As shown in FIG. 5, the microwave input to water was changed by changing the angle of the dielectric plate.

As described above, the amount of the object to be heated is detected, and the dielectric plate is moved to a predetermined rotation angle based on the detection signal, and then stopped at the rotation angle. The microwave output of the high-frequency generator is determined preferentially with respect to the microwave distribution in the heating chamber based on the angle when the dielectric plate is stopped, and the optimum microwave output is supplied according to the amount of the object to be heated. Thus, the object to be heated can be heated in a short time.

(Embodiment 3) Next, a third embodiment of the present invention will be described.

FIG. 6 is a schematic configuration diagram of a high-frequency heating device showing a third embodiment of the present invention.

Referring to FIG. 6, a point of difference between the third embodiment of the present invention and the second embodiment will be described. Reference numeral 25 denotes an angle detecting means for determining the rotation angle of the dielectric plate 21a. The motor 26 is formed of a stepping motor, and rotates the dielectric plate 21a by moving the dielectric plate 21a stepwise at a constant angle. The angle detecting means 25 outputs to the control means 23 a signal for determining when the dielectric plate 21a has a rotation angle of 0 °. Control means 23
Controls the rotation angle of the dielectric plate 21a based on the number of steps since the rotation angle of the dielectric plate 21a is 0 °. In addition, the control unit 23 receives signals from the amount detection unit 24 and the angle detection unit 25, and
6. Control at least one of the motors 26. At this time, the control means 23 may control all of the magnetron 11, the motor 16 and the motor 26 at the same time.

Next, a description will be given of an operation and a control embodiment of the above configuration. The angle detecting means 25 includes the dielectric plate 21a
Output a reset signal for determining that the rotation angle is 0 °. With this signal, the control means 23 sets the angle of the dielectric plate 21a to a specified angle after the heating of the object to be heated is completed.
For example, by stopping at a rotation angle of 0 °, the apparatus stands by until the next heating of the object to be heated. This guarantees the reliability of the rotation angle control of the dielectric plate 21a.

The control means 23 further controls the microwave output in accordance with the rotation angle of the dielectric plate 21a.
As described in the second embodiment, when the rotation angle of the dielectric plate 21a is changed, the input of the microwave to the object to be heated increases or decreases. In order to promote uniform heating of the object to be heated, control is performed to change only the microwave distribution while keeping the input of the microwave to the object to be heated constant. That is, when the rotation angle of the dielectric plate 21a is at a position where the microwave input to the object to be heated is weak, the control means 23 increases the microwave output and at the rotation angle at which the microwave input becomes strong. Reduces the microwave output.

By providing the angle detecting means 25, the rotation angle of the dielectric plate 21a can be determined with high reliability, the microwave input to the object to be heated can be quickly controlled, and Heating can be made uniform.

(Embodiment 4) Next, a fourth embodiment of the present invention will be described.

Referring to FIG. 7, the difference between the fourth embodiment of the present invention and the third embodiment will be described. Reference numeral 27 denotes a mounting table height changing unit that can change the mounting height of the turntable (mounting table) 14 from the bottom surface of the heating chamber 13. That is, the mounting table height changing means 27 has a folded foot, and by pulling out the foot, the mounting height of the turntable 14 from the bottom of the heating chamber 13 is set to a predetermined height as shown in the figure. The structure is such that it can be easily supported.

With the above configuration, when the height of the turntable 14 is changed, the microwave distribution on the turntable 14 changes. Therefore, when heating the object to be heated, by selecting the height of the turntable 14, an optimal heating distribution according to the object to be heated can be given, so that the object to be heated is heated more effectively. be able to.

The turning operation of the turntable 14 at this time may be stopped or may be rotating. Furthermore, in the case of the present embodiment, the height of the mounting table is changed by a member connected to the drive shaft of a motor (first driving means) 16 that supports the turntable 14 and rotates the turntable 14 to change the height. Although the configuration in which the means is provided is shown, a method of replacing the entire turntable 14 may be used.

In the present embodiment, when the rotation angle of the dielectric plate 21a is 0 °, the heating distribution of the object to be heated in a state where the foot of the mounting table height varying means 27 is accommodated (when the height is 0 mm) is shown. A state in which the foot of the mounting table height varying means 27 is pulled out (the height is 3
The heating distribution of the object to be heated (at 0 mm) is shown in FIG.

By changing the height of the turntable (mounting table) as shown in FIG. 8, the heating distribution of the object to be heated could be changed.

As described above, by changing the mounting height of the turntable 14 and heating, the object to be heated can be more uniformly heated in accordance with the type of the object to be heated.

(Embodiment 5) Next, a fifth embodiment of the present invention will be described.

FIG. 9 is an external view of a high-frequency heating device according to a fifth embodiment of the present invention. In FIG. 9, reference numeral 28 denotes an operation panel disposed on the front surface of the apparatus main body 10. The operation panel 28 is provided with a shape selection key 29 for inputting information corresponding to the shape of the object to be heated. Shape selection key 2
Reference numeral 9 denotes three types of shape selection keys, for example, height, normal, and flat. When the shape of the object to be heated is selected with the shape selection key, the selected information is sent to the control means 23 (see FIG. 6).
Sent to When the heating start information is input, the control means 23 selects the operation content of the magnetron 11 for heating the object to be heated in consideration of the information of the object to be heated input from the shape selection key 29, and selects the selected operation. By supplying the driving power based on the contents to the magnetron, the magnetron 11
Starts operation. In conjunction with this, the motor (first driving means) 16 and the dielectric plate 21 are controlled by the control condition selected in the control means 23 based on the input information of the shape selection key 29.
The rotation drive motor (second drive means) 26 of a is driven. As a result, uniform heating can be promoted in the microwave distribution according to the shape of the object to be heated.

The contents described in the fourth embodiment may be applied to the above.

As described above, when the user of the present apparatus selects and inputs the shape of the object to be heated on the turntable 14, uniform heating of the object to be heated is more effective in accordance with the shape of the object to be heated. Can be promoted.

[0058]

As described above, according to the first aspect of the invention, the impedance of the aperture is varied by the impedance varying means to change the flow of the high-frequency current on the wall surface having the aperture. In addition, the microwave distribution in the heating chamber can be changed. Thereby, uneven heating of the object to be heated can be eliminated.

According to the second aspect of the present invention, the impedance varying means is controlled by detecting the amount of the object to be heated, and the intensity and the distribution of the microwave applied to the object to be heated are controlled. be able to. This makes it possible to supply an optimal microwave according to the amount of the object to be heated to the object to be heated, thereby achieving uniform heating.

According to the third aspect of the present invention, it is possible to determine the rotation angle of the dielectric plate and control the intensity of the microwave applied to the object to be heated by stopping at a predetermined rotation angle. it can. Thereby, it is possible to preferentially supply an optimum microwave according to the amount of the object to be heated to the object to be heated and to heat the object in a short time.

According to the fourth aspect of the present invention, the intensity of the microwave applied to the object to be heated and the heating distribution of the object to be heated can be changed by changing the height of the mounting table. This makes it possible to eliminate uneven heating by changing the mounting height according to the type of the object to be heated.

According to the fifth aspect of the present invention, the microwave distribution in the heating chamber is changed by controlling the impedance varying means on the basis of the information from the shape selection key and the amount detecting means. Optimum heating according to the shape of the object can be performed to eliminate uneven heating.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a high-frequency heating device showing a first embodiment of the present invention.

FIG. 2 is an external view of the high-frequency heating device.

FIG. 3 is a diagram showing a rotation angle and a heating distribution of an impedance variable unit of the high-frequency heating device.

FIG. 4 is a schematic configuration diagram of a high-frequency heating device showing a second embodiment of the present invention.

FIG. 5 is a diagram showing the rotation angle of the impedance variable means and the input power to water of the high-frequency heating device.

FIG. 6 is a schematic configuration diagram of a high-frequency heating device showing a third embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a high-frequency heating device showing a fourth embodiment of the present invention.

FIG. 8 is a view showing the relationship between the height of the mounting table and the heating distribution of the high-frequency heating device

FIG. 9 is an external view of a high-frequency heating device according to a fifth embodiment of the present invention.

FIG. 10 is a schematic configuration diagram of a conventional high-frequency heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Magnetron (high frequency generation means) 13 Heating chamber 14 Turntable (mounting table) 16 Motor (first drive means) 17 Power supply port 18 Opening part 20 Groove part 21 Impedance variable means 21a Dielectric plate (rotary plate) 22, 26 Motor (Second drive means) 23 control means 24 quantity detection means 25 angle detection means 27 mounting table variable means

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Tomomi Uchiyama 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 3K086 AA01 BA08 CC20 FA03 3K090 AA01 AB01 BA01 EB09 MA01

Claims (5)

[Claims] 1. A heating chamber for storing an object to be heated, a mounting table provided in the heating chamber for mounting the object to be heated, first driving means for rotating and driving the mounting table, and radiation into the heating chamber. High-frequency generating means for generating high-frequency waves, a power supply port for radiating the high-frequency waves generated by the high-frequency generating means to the heating chamber, an opening provided on a wall surface forming the heating chamber, and one end of the opening. A high frequency heating device comprising: a groove portion to be formed; an impedance variable means provided in the groove portion for varying the impedance of the opening; and a second drive means for driving the impedance variable means. 2. A heating chamber for storing an object to be heated, a mounting table provided in the heating chamber for mounting the object to be heated, first driving means for rotating and driving the mounting table, and radiation into the heating chamber. High-frequency generating means for generating high-frequency waves, a power supply port for radiating the high-frequency waves generated by the high-frequency generating means to the heating chamber, an opening provided on a wall surface forming the heating chamber, and one end of the opening. A groove portion, an impedance variable means provided in the groove portion and varying the impedance of the opening portion, a second drive means for driving the impedance variable means, and a detection means for detecting the amount of the object to be heated, A high-frequency heating device comprising: a high-frequency generating unit; and a control unit that controls at least one of the first driving unit and the second driving unit based on a detection signal of the detection unit. 3. The impedance variable means is configured to be driven to rotate, and an angle determination means for determining a rotation angle of the impedance variable means is added. The control means is configured to detect an amount of the object to be heated based on a detection signal of the detection means. 3. The high-frequency heating apparatus according to claim 2, wherein said second driving means is controlled so as to stop said impedance varying means at a predetermined rotation angle. 4. The high-frequency heating apparatus according to claim 1, wherein the mounting table is configured to be variable in height from the bottom of the heating chamber. 5. A shape selection key for designating a shape of an object to be heated is added, and the second driving unit is controlled based on information from the shape selection key and a detection signal of a detection unit for detecting an amount of the object to be heated. The high-frequency heating device according to claim 2, wherein the high-frequency heating device is controlled.