JP2002050465A - High frequency thawing equipment - Google Patents

Abstract

(57) [Problem] To provide a high-frequency thawing apparatus that realizes uniform thawing in a short time regardless of the shape of an object to be thawed. SOLUTION: A lower electrode 2 and an upper electrode 3 are provided in a thawing chamber 1.
And the two electrodes 2 and 3 from the high-frequency oscillator 5 and the control means 6.
A high-frequency electric field is applied between them. During thawing, the upper electrode 3 moves back and forth and right and left by the XY drive mechanism 4, and uniform thawing can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency thawing apparatus for thawing frozen foods in a uniform and short time using high-frequency dielectric heating on the order of MHz.

[0002]

2. Description of the Related Art Conventionally, a high-frequency thawing apparatus for performing thawing by high-frequency dielectric heating at several to several tens of MHz, as shown in FIG. In addition, a lower electrode (not shown) was provided in the lower part of the thawing chamber 62, and a high-frequency voltage was applied between both electrodes. 13, reference numeral 60 denotes a door, 61 denotes a support shaft of the door 60, 64 denotes a tray made of a resin having a low dielectric constant, and 65 denotes a frozen food. In such a high-frequency thawing apparatus, the size of the electrode is constant regardless of the size of the object to be thawed.
The height of the object to be thawed also varies. For this reason, when the object to be thawed is smaller than the electrode, there is a problem that the electric field is concentrated on a part of the object to be thawed and uneven thawing occurs.

To solve this problem, Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 156581, an electrode in which the upper electrode is formed smaller than the upper end surface of the object to be thawed has been proposed. Further, as disclosed in Japanese Patent Publication No. 60-9784, a device has been proposed in which the high-frequency electric field intensity is varied by changing the distance between the electrodes. Further, as disclosed in JP-A-63-12358, the upper electrode is separated from the material to be thawed by 10 to 2 times.
There has been proposed one that is separated by about 0 mm to reduce the influence of the air gap due to the unevenness of the object to be thawed. Japanese Patent Application Laid-Open No. 8-
As disclosed in Japanese Patent Publication No. 255682, there has been proposed a device in which the shape and area of at least one electrode are changed according to the contour shape of the object to be thawed.

[0004]

The high-frequency thawing apparatus described in each of the above publications can reduce thawing unevenness to some extent by adjusting the distance between the electrode and the object to be thawed or the shape and area of the electrode. In general, frozen foods to be thawed are made up of parts with many different properties and compositions (eg, seasonings, meat redness, muscle and fat).
The dielectric constant, the dielectric power factor, and the specific heat differ greatly from site to site. Here, the high frequency absorption energy is expressed by the following equation.

P = k · ε · tanδ · f · E ^ 2 · 10 ^ -12 (W / cm ^ 3) (1) P: Absorbed energy k: Coefficient ε: Dielectric loss tanδ: Dielectric power factor f: High frequency E: electric field strength As is apparent from the equation (1), since power is absorbed by the material to be thawed in proportion to the dielectric constant and the dielectric power factor, a large amount of the dielectric constant and the dielectric power factor Since electric power is absorbed, there are many problems to prevent the occurrence of uneven thawing, and there is room for improvement.

The high-frequency thawing machine according to the present invention is intended to solve the above-described problem. By moving at least one of the electrodes on a front-rear left-right plane or a front-rear left-right upper-lower space as the thawing progresses, An object of the present invention is to provide a high-frequency thawing apparatus that realizes more uniform thawing in a short time and regardless of the shape of the object to be thawed.

[0007]

In order to achieve the above object, a pair of electrodes installed in a thawing chamber, a high-frequency oscillation means for generating a high-frequency electric field between the electrodes, and at least one of the front, rear, left and right electrodes are connected. XY driving means for moving on a plane and control means for controlling each of the above means are provided. By moving the at least one electrode on the front, rear, left and right planes via the XY driving means as the thawing progresses, more uniform thawing can be realized in a short time and regardless of the shape of the object to be thawed. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-frequency thawing apparatus according to a first aspect of the present invention comprises a pair of electrodes installed in a thawing chamber, a high-frequency oscillating means for generating a high-frequency electric field between the electrodes, and at least one electrode. XY driving means for moving on the left and right planes, and control means for controlling the respective means, wherein the at least one electrode is moved on the front, rear, left and right planes via the XY driving means as the thawing progresses. Can perform more uniform thawing.

According to a second aspect of the present invention, there is provided a high-frequency thawing apparatus, wherein a thawing chamber is provided with a mounting plate made of a non-metallic material having a small dielectric loss and a low thermal conductivity, and the lower electrode is separated from the object to be thawed. Can perform more uniform thawing.

According to a third aspect of the present invention, there is provided a high-frequency thawing apparatus comprising a mounting plate made of a nonmetallic material having a small dielectric loss and a low thermal conductivity in a thawing chamber, and a separating plate, and both upper and lower electrodes. By isolating the object and the object to be thawed, more uniform thawing can be performed.

A high-frequency thawing apparatus according to a fourth aspect of the present invention is provided with an insulating cover and a mounting plate made of a nonmetallic material having low dielectric loss and low thermal conductivity in a thawing chamber, and covering the upper electrode with the insulating cover. This enables more uniform thawing.

According to a fifth aspect of the present invention, there is provided a high-frequency thawing apparatus comprising a pair of insulating covers made of a nonmetallic material having a small dielectric loss and a low thermal conductivity in a thawing chamber. More uniform thawing can be performed by covering with.

According to a sixth aspect of the present invention, there is provided a high-frequency thawing apparatus, comprising: a pair of electrodes installed in a thawing chamber; a high-frequency oscillating means for generating a high-frequency electric field between the electrodes; XYZ driving means for moving on a space, distance detecting means for detecting distance information between the object to be defrosted and one of the electrodes, and control means for controlling each of the means, and the XYZ driving means is provided as the defrosting progresses. Through,
More uniform thawing can be performed by moving the at least one electrode in front, rear, left, right, and upper and lower spaces.

According to a seventh aspect of the present invention, there is provided a high-frequency thawing apparatus, comprising: a pair of electrodes installed in a thawing chamber; a high-frequency oscillating means for generating a high-frequency electric field between the electrodes; XY driving means for moving
A magnetic member provided on a part of the driving electrode, a magnetic metal part provided on a part of a tray made of a non-metallic material having a low thermal conductivity on which an object to be heated is placed, and a control for controlling each of the means. Means for moving the at least one of the electrodes on the front, rear, left and right planes through the XY driving means as the thawing progresses, and thawing the food while moving so that more uniform thawing can be performed. it can.

According to an eighth aspect of the present invention, in the high-frequency decompression apparatus according to any one of the first to seventh aspects, the control means controls at least one of the high-frequency decompression based on the time series signal output from the timer means. More uniform thawing can be performed by moving the electrodes.

According to a ninth aspect of the present invention, in the high-frequency thawing apparatus according to any one of the first to seventh aspects, the control means controls at least one of the high-frequency thawing based on a result of detecting a high-frequency current or power. More uniform thawing can be performed by moving the electrodes.

According to a tenth aspect of the present invention, in the high frequency decompression apparatus according to any one of the first to seventh aspects, the control means includes one or a plurality of image sensors. More uniform thawing can be performed by moving at least one electrode based on the result of measuring the distance from the object to the object to be thawed and the surface condition of the object to be thawed.

[0018]

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

(Embodiment 1) FIG. 1 is a schematic configuration diagram showing the configuration of a high-frequency decompression apparatus according to Embodiment 1 of the present invention. Thawing room 1
A lower electrode 2, an upper electrode 3, and XY driving means 4 are provided therein, and a high-frequency oscillating means 5 and a control means 6 control each of the above means. Reference numeral 7 denotes operating means for instructing the control means 6 to start or stop thawing, and 8 denotes an object to be thawed. High-flexibility high-voltage cable (not shown) from high-frequency oscillation means 5 to upper electrode 3
Connected through.

The outline of the operation of this embodiment will be described below. When the user performs a thawing operation using the operating means 7, the control means 6 receives the signal and drives the XY driving means 4 to move the upper electrode 3 to the end of the object 8 to be thawed. Further, the high-frequency oscillation means 5 is operated to apply a high-frequency voltage to the upper electrode 2 and the lower electrode 2. The position of the upper electrode 3 is appropriately moved as the thawing process proceeds. When the thawing of the object 8 is completed, the high-frequency oscillation means 5 and the XY driving means 4 are stopped. As shown in FIG. 1, the XY driving means 4 appropriately drives the upper electrode 3 back and forth and right and left as the thawing progresses, so that uniform thawing is performed without partial boiling.

(Embodiment 2) FIG. 2 is a schematic configuration diagram showing the configuration of a high-frequency decompression device according to Embodiment 2 of the present invention. Since the basic configuration is almost the same as that of the first embodiment, the corresponding parts are denoted by the same reference numerals and detailed description thereof will be omitted. The feature of the present embodiment is that a mounting plate 10 made of a nonmetallic material (for example, a resin material such as polyethylene) having a small dielectric loss and a low thermal conductivity is provided in the thawing chamber 1. By disposing the gap between the lower electrode 2 and the object 8 to be separated by the mounting plate 10, concentration of the electric field on the end of the object 8 to be thawed is reduced, and uniform thawing is performed. Further, if the high potential side of the high frequency oscillation means 5 is connected to the lower electrode 2, the upper electrode 3 has the same potential as the thawing chamber 1 so that it is safe to touch with the hand and the movable part can be simplified. In addition, the lower electrode 2 is not contaminated by the drip (water, meat juice, cooking juice, etc. that has been melted and flown out) of the material 8 to be thawed, and insulation is not deteriorated.

(Embodiment 3) FIG. 3 is a schematic configuration diagram showing the configuration of a high-frequency decompression device according to Embodiment 3 of the present invention. Since the basic configuration is almost the same as that of the second embodiment, the corresponding portions are denoted by the same reference numerals and detailed description thereof will be omitted. The feature of this embodiment is that a separating plate 11 of the same material is provided in the thawing chamber 1 in addition to the mounting plate 10 made of a nonmetallic material having a small dielectric loss and a low thermal conductivity. The lower plate 2 and the upper electrode 3 are separated from the object 8 by the mounting plate 10 and the separating plate 11 so that a gap is provided between the lower electrode 2 and the upper electrode 3, so that the electric field concentration on the end of the object 8 is relaxed and uniform thawing is performed. Will be In addition, since the high potential portion is not exposed, it is safe to touch with a hand.

(Embodiment 4) FIG. 4 is a schematic configuration diagram showing the configuration of a high-frequency decompression device according to Embodiment 4 of the present invention. Since the basic configuration is almost the same as that of the second embodiment, the corresponding parts are denoted by the same reference numerals and their description is omitted. This embodiment is characterized in that the upper electrode 3 in the thawing chamber 1 is covered with an insulating cover 12 made of a nonmetallic material having a low dielectric loss and a low thermal conductivity. By covering the upper electrode 3 with the insulating cover 12, even when the distance between the upper electrode 3 and the object 8 to be decompressed is reduced, the electric field concentration on the end of the object 8 to be decompressed is eased and uniform defrosting is performed. Can be reduced in size.

(Embodiment 5) FIG. 5 is a schematic configuration diagram showing the configuration of a high-frequency decompression apparatus according to Embodiment 5 of the present invention. Since the basic configuration is almost the same as that of the fourth embodiment, the corresponding parts are denoted by the same reference numerals and the description thereof will be omitted. This embodiment is characterized in that the upper electrode 3 and the lower electrode 2 in the thawing chamber 1 are covered with insulating covers 12 and 13 made of a nonmetallic material having a small dielectric loss and a low thermal conductivity, respectively. By covering both electrodes 3 and 2 with insulating covers 12 and 13, both electrodes 3 and
Even if the distance between the object 2 and the object 8 is narrowed, the electric field concentration on the end of the object 8 can be relaxed, the uniform thawing can be performed, and the apparatus can be downsized.

(Embodiment 6) FIG. 6 is a schematic configuration diagram showing the configuration of a high-frequency decompression device according to Embodiment 6 of the present invention. The same parts as those in the first to fifth embodiments are denoted by the same reference numerals. A lower electrode 2, an upper electrode 3, and an XYZ drive unit 15 are provided in the thawing chamber 1, and a high-frequency oscillation unit 5 and a control unit 17 control each of the units. Reference numeral 7 denotes operating means for instructing the control means 17 to start or stop thawing, and 8 denotes an object to be thawed. Reference numeral 10 denotes a mounting plate made of a non-metallic material having low dielectric loss and thermal conductivity;
Reference numeral 2 denotes an insulating cover made of the same material, and reference numeral 16 denotes a distance detecting means for detecting distance information between the object 8 and the upper electrode 3.
The upper electrode 3 is connected from the high-frequency oscillator 5 via a high-flexibility high-voltage cable (not shown).

The operation of this embodiment will be briefly described below. When the user performs the thawing operation by the operating means 7, the control means 17 receives the signal and the distance detecting means 16 detects the distance information between the object 8 and the upper electrode 3 while the XYZ driving means 15 receives the signal. To move the upper electrode 3 to the end of the object 8 to be thawed. Further, the high-frequency oscillation means 5 is operated to apply a high-frequency voltage to the upper electrode 3 and the lower electrode 2. As the thawing process proceeds, the position of the upper electrode 3 is appropriately moved to each part of the object 8 to be thawed. When the thawing of the object 8 is completed, the high-frequency oscillating means 6 and the XYZ driving means 15 are stopped. As shown in FIG. 6, the upper electrode 3 is appropriately driven back and forth and right and left by the XYZ driving means 15 as the thawing progresses, so that uniform thawing is performed without partial boiling. Distance detection means 1
Reference numeral 6 may be a distance measuring sensor using ultrasonic waves or light, or a method of measuring and converting a dielectric constant between both electrodes and a high-frequency current and converting it.

(Embodiment 7) FIG. 7 is a schematic configuration diagram showing the configuration of a high-frequency decompression device according to Embodiment 7 of the present invention. The components having the same structure as those of the first to sixth embodiments are denoted by the same reference numerals, and the detailed description is omitted. In the thawing room 1, the upper electrode 2
0, a lower electrode 22, and XY driving means 25, and the high frequency oscillation means 5 and the control means 29 control each of the above means. 7
Denotes operation means for instructing the control means 29 to start or stop thawing, and 28 denotes an object to be thawed. 10 is a mounting plate made of a nonmetallic material having low dielectric loss and thermal conductivity, 21 and 23
Is an insulating cover made of the same material. Lower electrode 22
A magnetic member 24 is provided on a part of the tray 27, and a magnetic metal part 26 provided on a part of a tray 27 made of a nonmetallic material having a small dielectric loss and a low thermal conductivity on which the object 28 is to be placed exerts an attractive force. .

The operation of this embodiment will be briefly described below. When the control means 29 drives the XY drive means 25 to move the lower electrode 22 as the thawing progresses, the suction force of the magnetic member 24 and the magnetic metal part 26 causes the tray 27 on which the object 28 to be thawed to be slightly delayed. While moving. The tray 27 is appropriately moved back and forth and left and right by the XY driving means 25 and
As a result, the partial position is not boiled due to the change of the relative position, and uniform thawing is performed.

(Eighth Embodiment) FIG. 8 is a block diagram showing a configuration of a high-frequency decompression device according to an eighth embodiment of the present invention. Since the basic configuration is almost the same as that of the first embodiment, the corresponding parts are denoted by the same reference numerals and detailed description thereof will be omitted. The feature of this embodiment is that the control means moves at least one electrode based on the time series signal output from the timer means 31. Since a random time sequence is stored in the timer means 31, the upper electrode 3 is moved almost evenly on the object 8 to be thawed, so that the thaw is evenly performed.

(Embodiment 9) FIG. 9 is a block diagram showing the configuration of a high-frequency decompression apparatus according to Embodiment 9 of the present invention. Since the basic configuration is almost the same as that of the first embodiment, the corresponding parts are denoted by the same reference numerals and detailed description thereof will be omitted. Reference numeral 32 denotes a high-frequency current detecting means, which inputs the value of the high-frequency current applied between the electrodes 2 and 3 from the high-frequency oscillating means 5. The feature of this embodiment is that at least one of the electrodes is moved based on the result of detection of the high-frequency current or power by the control means. That is, the control means 6 receives the harmonic current value that changes from time to time from the high-frequency current detection means 32 and drives the upper electrode 3 so as to be equal to or less than each target value (stored in the control means 6) of the thawing process. Uniform thawing is performed.

(Embodiment 10) FIG. 10 shows Embodiment 1 of the present invention.
It is a block diagram which shows the structure of the high frequency decompression apparatus of No. 0. Since the basic configuration is almost the same as that of the first embodiment, the corresponding parts are denoted by the same reference numerals and detailed description thereof will be omitted. 33 is one or more image sensors. The feature of this embodiment is that at least one electrode is moved based on the result of measuring the distance from the image sensor 33 to the object 8 and the surface condition of the object 8. That is, the control unit 6 drives the XY driving unit 4 while calculating the distance between the object 8 and the upper electrode 3 based on information from the image sensor 33.
In addition, the surface state of the object 8 to be defrosted is measured based on information from the image sensor 33, and the end of the optimum defrosting is detected. Therefore, more uniform thawing is performed.

The driving means and the high-frequency oscillating means in each of the above embodiments will be described with reference to FIGS. FIG. 11 is a configuration diagram of the drive mechanism of the XY drive means.
FIG. 11A shows an example in which a ball screw is used. Reference numeral 40 denotes a motor, 41 denotes a ball screw, and 42 denotes a mover to which a bearing is integrally mounted. When the ball screw 41 is rotated by the motor 40, the mover 42 moves left and right.

FIG. 11B shows an example in which a pulley is used. 43 is a motor, 44 and 45 are pulley shafts, 46 is a belt, and 47 is a mover fixed to the belt 46. By rotating the pulley shaft 44 by the motor 44, the mover 47 moves left and right.

FIG. 11 (c) shows an example using a gear.
48 and 49 are gears, 50 is a chain, 51 is a chain 5
A mover fixed to 0. When the gear 48 is rotated by a motor (not shown), the mover 51 moves left and right. Each example shows one axis. In the case of a plurality of axes, these one axis is realized by combining XY or XYZ. In addition to the above examples, many drive systems such as a direct drive type using a linear motor are conceivable.

FIG. 12 is a schematic diagram of the high-frequency oscillation means. In FIG. 12, a signal on the order of MHz from an oscillator 52 is converted into a high voltage and a large power by an amplifier 53, and output to a pair of electrodes (not shown) via a power detector 54 and a matching circuit 55. The power detector 54 outputs the traveling wave power pf
And the reflected wave power pr is measured and output to the calculator 56. The calculator 56 calculates the approximate standing wave ratio SWR by calculating k · pr / pf, and outputs the result to the comparator 57. Comparator 57
Compares this value with the set value, and controls the amplification degree of the amplifier 53 and each element constant inside the matching circuit 55. Through this series of operations, application of a high-frequency electric field is realized according to the thawing state of the object placed between the electrodes.

The present invention is not limited to such a configuration. The XY driving means of the first embodiment may be configured to drive only one of the upper and lower electrodes, or may be configured to be driven simultaneously.

The distance detecting means of the sixth embodiment may be an image sensor.

[0038]

As described above, according to the high-frequency thawing apparatus according to the first aspect of the present invention, at least one of the pair of electrodes installed in the thawing chamber is moved forward, backward, left and right as the thawing progresses. By moving on a plane, more uniform thawing can be performed.

Further, according to the high frequency thawing apparatus of the sixth aspect of the present invention, the high frequency thawing apparatus is provided with distance detecting means for detecting distance information between the object to be thawed and one of the electrodes installed in the thawing chamber. More uniform thawing can be performed by moving in the front, rear, left, right, up and down spaces.

According to the high frequency thawing apparatus of the seventh aspect of the present invention, the magnetic member provided on a part of the electrode installed in the thawing chamber and the magnetic metal part provided on a part of a tray on which an object to be heated is placed are provided. Thus, by thawing the food while moving it, more uniform thawing can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating a high-frequency decompression device according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram illustrating a high-frequency decompression device according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram illustrating a high-frequency decompression device according to a third embodiment of the present invention.

FIG. 4 is a schematic configuration diagram illustrating a high-frequency decompression device according to a fourth embodiment of the present invention.

FIG. 5 is a schematic configuration diagram illustrating a high-frequency decompression device according to a fifth embodiment of the present invention.

FIG. 6 is a schematic configuration diagram illustrating a high-frequency decompression device according to a sixth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram illustrating a high-frequency decompression device according to a seventh embodiment of the present invention.

FIG. 8 is a block diagram showing a high-frequency decompression device according to an eighth embodiment of the present invention.

FIG. 9 is a block diagram showing a high-frequency decompression device according to a ninth embodiment of the present invention.

FIG. 10 is a block diagram showing a high-frequency decompression device according to a tenth embodiment of the present invention.

FIG. 11 is a configuration diagram of a driving mechanism of XY driving means in the high-frequency decompression device.

FIG. 12 is a schematic configuration diagram of a high-frequency oscillation unit in the high-frequency decompression apparatus.

FIG. 13 is an external view of a conventional high-frequency thawing apparatus with a door opened.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 thawing chamber 2 lower electrode 3 upper electrode 4 XY driving means 5 high frequency oscillation means 6 control means 7 operating means 8 object to be defrosted 10 mounting plate 11 separator 12 and 13 insulating cover 15 XYZ driving means 16 distance detecting means 17 control means DESCRIPTION OF SYMBOLS 20 Upper electrode 21, 23 Insulating cover 22 Lower electrode 24 Magnetic member 25 XY drive means 26 Magnetic metal part 27 Tray 28 Thawing object 29 Control means 31 Timer means 32 High frequency current detection means 33 Image sensor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K086 AA01 BA09 CA20 CB05 CB06 CC20 CD11 3K090 AA01 AB03 BA06 4B022 LQ07 LT07

Claims (10)

[Claims] 1. A pair of electrodes installed in a thawing chamber, high-frequency oscillation means for generating a high-frequency electric field between the electrodes, XY driving means for moving at least one electrode on front, rear, left and right planes, A high-frequency decompression device comprising a control means for controlling, and moving the at least one electrode on the front, rear, left and right planes via the XY driving means as the decompression progresses. 2. The high-frequency thawing device according to claim 1, wherein the lower electrode of the thawing chamber and the object to be thawed are separated by a mounting plate made of a nonmetallic material having low dielectric loss and low thermal conductivity. apparatus. 3. The method according to claim 1, wherein the upper and lower electrodes of the thawing chamber are separated from a mounting plate made of a nonmetallic material having low dielectric loss and thermal conductivity by a separator. The high-frequency thawing apparatus as described. 4. The high-frequency thawing apparatus according to claim 1, wherein the upper electrode of the thawing chamber is covered with an insulating cover made of a non-metallic material having low dielectric loss and thermal conductivity. 5. The high-frequency thawing apparatus according to claim 1, wherein both the upper and lower electrodes of the thawing chamber are covered with an insulating cover made of a nonmetallic material having a small dielectric loss and a low thermal conductivity. . 6. A pair of electrodes installed in a thawing chamber, high-frequency oscillating means for generating a high-frequency electric field between the electrodes, XYZ driving means for moving at least one electrode in front, rear, left and right and up and down spaces, A distance detecting means for detecting distance information between the object and one of the electrodes; and a control means for controlling each of the means, and the at least one electrode is moved back and forth through the high XYZ driving means as the thawing progresses. A high-frequency decompression device characterized by moving in left, right, up and down spaces. 7. A pair of electrodes installed in a thawing chamber, high-frequency oscillation means for generating a high-frequency electric field between the electrodes, XY driving means for moving at least one electrode on the front, rear, left and right planes, and the driving electrodes A magnetic member provided on a part of the tray, a magnetic metal part provided on a part of a tray made of a non-metallic material having a low thermal conductivity for placing an object to be thawed, and control means for controlling each of the means, A high-frequency thawing apparatus characterized in that the thawing progresses, the at least one electrode is moved on the front, rear, left and right planes via the XY driving means, and the thawing is performed while moving the food. 8. The high frequency decompression apparatus according to claim 1, wherein the control means moves at least one of the electrodes based on a time series signal output from the timer means. 9. The high-frequency decompression device according to claim 1, wherein the control means moves at least one of the electrodes based on a result of detecting the high-frequency current or the electric power. 10. The control means includes one or a plurality of image sensors, and moves at least one electrode based on a result of measuring a distance from the image sensor to the object to be defrosted and a surface condition of the object to be defrosted. The high-frequency decompression device according to any one of claims 1 to 7, wherein the high-frequency decompression device is operated.