JP2003086349A - High frequency heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high frequency heating device prevented residual food from sticking or intruding inside a wave guide or to the periphery of a power supply opening, or inside a gap between a power supply opening cover and inner wall of a heating chamber. SOLUTION: The high frequency heating device comprises a heating chamber 20 heating an object 26, a high frequency oscillator 22 supplying high frequency to the heating chamber 20, a power supply opening 21 formed at a side plate 21a of the heating chamber 20 supplying the high frequency oscillated from the high frequency oscillator 22 in the heating chamber 20, and a cover 1 for the power supply opening formed so as to cover the power supply opening 21. The cover 1 for the power supply opening is detachment freely mounted to the side plate 21a of the heating chamber 20, and a foreign substance intrusion preventing plate 1a is inserted into an insertion opening 2 formed at the peripheral part of the power supply opening 21 when the cover 1 for the power supply opening is mounted to the side plate 21a of the heating chamber 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 for irradiating an object to be heated housed in a heating chamber with a high frequency to perform dielectric heating.

[0002]

2. Description of the Related Art FIG. 14 is a cross-sectional view of a conventional high-frequency heating apparatus, and FIG. 15 is a perspective view of its main part. In the figure,
Reference numeral 20 denotes a substantially box-shaped heating chamber having an opening on the front surface, and a main body of a high-frequency heating device having an opening on the front surface (not shown).
Is formed inside. Reference numeral 20a denotes a side plate of the heating chamber 20, and a power supply port 21 is provided at an upper portion and a lower portion of the side plate 20a on the right side in FIG. 22 is a high frequency oscillator provided outside the heating chamber 20 for oscillating high frequencies in the frequency band from 300 MHz to 30 GHz; 23 is an antenna of the high frequency oscillator 22; 24 is a high frequency oscillator 22 and a high frequency power supply port from the antenna 23. It is a waveguide that propagates to the heating chamber 20 via the. 25 is a mounting table on which the object to be heated 26 is mounted, 27 is a rotary plate that supports the mounting table 25, and is formed of a metal material and is rotatably provided near the bottom plate 20b of the heating chamber 20. 28 is a motor for rotating the rotary plate 27,
It is connected to the rotary plate 27 via a.

Reference numeral 29 denotes a high-frequency transparent power supply port cover that transmits the high frequency waves propagated from the waveguide 24 through the power supply port 21. The power supply port cover 29 has, for example, a rectangular plate shape, and has holes 29 formed at the four corners of the power supply port cover 29.
The heating chamber 20 is equipped with a fastener 30 such as a heat-resistant screw for a.
It is generally fixed to a fastener receiver 20e formed on the side plate 20a.

A door (not shown) that can be opened and closed is attached to the front surface of the main body of the high-frequency heating device.
The door appropriately closes the main body and the opening of the heating chamber 20. Further, on the right side of the front surface of the main body, there is provided an operation panel (not shown) on which a display unit, operation buttons and the like are arranged.

Next, the operation will be described. Object to be heated 26
In the case of cooking by heating, first, the door is opened, the object to be heated 26 is placed on the placing table 25, and the door is closed. Next, a cooking menu is selected by an operation panel (not shown) provided on the main body, a cooking time is set, and cooking is started. With this start, the high frequency oscillator 22 operates and oscillates a high frequency. This high frequency wave is transmitted through the antenna 23 to the waveguide 2
4 and is radiated from the power supply port 21 into the heating chamber 20. At the same time, the motor 28 operates and the rotary plate 27
Then, the mounting table 25 and the object to be heated 26 supported by the rotary plate 27 are rotated.

The high frequency waves radiated in the heating chamber 20 are diffused in the heating chamber 20, are successively reflected by the wall surface in the heating chamber 20, and are irradiated onto the object to be heated 26. As a result, the object to be heated 26 is heated. A liquid such as food scraps or juice may be scattered in the heating chamber 20 due to a phenomenon such as boiling depending on the shape, size, amount, material, sealed state, etc. of the object to be heated 26, which is mainly food. In addition, the user may spill the contents of the article to be heated 26 into the heating chamber 20. In such a situation, the power supply port cover 2
9 has a function of preventing food dust and liquid scattered from the power supply port 21 into the waveguide 24 from entering.

[0007]

The conventional high-frequency heating device is configured as described above, and liquids such as food scraps and juice scattered from the object to be heated adhere to the power supply port cover, and There is a problem that when the power supply port enters through a gap between the wall surface and the wall, carbonization occurs around the power supply port, which may cause combustion. In addition, in order to prevent such a situation, a dirty power supply port cover may be cleaned, but in this case, there is a problem that complicated power supply port cover removal work such as removing screws is required.

The present invention has been made to solve the above problems, and reduces the possibility of food waste, liquid, etc. entering between the power supply port cover and the wall surface of the heating chamber to improve safety. In addition, it is an object of the present invention to provide a high-frequency heating device that improves the cleanability by easily removing the power supply port cover from the heating chamber.

[0009]

A high-frequency heating apparatus according to the present invention comprises a heating chamber for heating an object to be heated, a high-frequency oscillator for oscillating a high frequency in the heating chamber, and the high-frequency device provided on a wall surface of the heating chamber. In a high-frequency heating device comprising a power supply port for supplying a high frequency oscillated from an oscillator into the heating chamber, and a power supply port cover provided so as to cover the power supply port, the power supply port cover is detachable from the heating chamber. A foreign matter intrusion prevention unit is provided which is mounted so as to be capable of being inserted into the outer peripheral portion of the power supply port when mounted on the wall surface of the heating chamber.

Further, when the foreign matter insertion preventing portion is inserted, a power feeding port cover pressing member for contacting the foreign matter insertion preventing portion and fixing the power feeding port cover to the heating chamber is provided.

Further, detection means for detecting the presence or absence of the power supply port cover is provided, and based on a signal from the detection means,
The high frequency oscillator is not operated when the power feed port cover is not attached.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a perspective view of a main part showing a structure of a power supply port cover of a high-frequency heating device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main part. The same or equivalent parts as those of the conventional example are designated by the same reference numerals,
Illustration and description are omitted. In the figure, reference numeral 1 denotes a power supply port cover provided so that liquid such as food scraps and soy sauce scattered from an object to be heated does not adhere to or enter the power supply port 21.
The power supply port cover 1 is provided with a foreign matter intrusion prevention plate 1a so as to be located on the side plate 20a side and on the outer periphery of the power supply port 21. Reference numeral 2 denotes an insertion port formed on the outer periphery of the power supply port 21 of the side plate 20a for inserting the foreign matter intrusion prevention plate 1a. By inserting the foreign matter invasion prevention plate 1a into the insertion port 2, the periphery of the power supply port 21 is sealed. The foreign matter intrusion prevention plate 1a is formed integrally with the power supply port cover 1 by means such as bonding, and the material thereof is the heating chamber 2
A heat resistant material is used to satisfy the durability within 0.

In the first embodiment, the foreign matter intrusion prevention plate 1a is formed so as to surround the outer periphery of the power supply port 21. However, the direction in which food dust or liquid is particularly likely to be scattered, one side or a plurality of sides You may provide so that it may cover.

According to the first embodiment, the foreign matter intrusion prevention plate 1
a prevents the food scraps or liquid from entering between the side plate 20a and the power supply port cover 1, and thus the food waste or liquid enters the waveguide 24 from the power supply port 21 or the power supply in which the electric field tends to be strong. Adhesion around the mouth 21 can be prevented. Therefore, the possibility of carbonization and burning reduction due to liquids such as food scraps and soy sauce is dramatically reduced.

Since the power supply port cover 1 and the foreign matter intrusion prevention plate 1a are detachably attached to the side plate 20a,
Cleaning by the user is also possible, and the effect of preventing foreign matter from adhering can be further expected. In addition, the foreign matter intrusion prevention plate 1a
However, since it also functions as a fixture of the power supply port cover 1 to the side plate 20a, a fastener and a retainer are unnecessary, and the number of manufacturing steps can be reduced.

Embodiment 2. FIG. 3 is a perspective view of a main part showing a structure of a power supply port cover of a high frequency heating device according to a second embodiment of the present invention. The same or equivalent portions as those of the conventional example or the first embodiment are denoted by the same reference numerals,
The description is omitted. In the figure, reference numeral 3 denotes a power supply port cover provided so that liquid such as food scraps and soy sauce scattered from the object to be heated does not adhere to or enter the power supply port 21 and has a rectangular parallelepiped shape with one surface opened. The side plate 20a of the heating chamber is provided with an insertion port 2 configured so as to surround the outer periphery of the power supply port 21, and the side surface 3a (foreign substance intrusion prevention part) of the power supply port cover 3 is inserted therein. Then, the power supply port cover 3 is inserted into the insertion port 2 to be mounted in the heating chamber.

According to the second embodiment, the side surface 3a, which is the foreign matter intrusion prevention portion of the power feed port cover 3, prevents food scraps or liquid from entering between the side plate 20a and the power feed port cover 3, and It is possible to prevent food scraps or liquid from entering into the waveguide from 21, and to prevent food scraps or liquid from adhering around the power supply port 21 where the electric field tends to be strong. Therefore, it is possible to prevent carbonization and burning of the present state due to liquids such as food waste and soy sauce.

Embodiment 3. FIG. 4 is a perspective view of a main part showing a structure of a power supply port cover of a high frequency heating device according to a third embodiment of the present invention. The same or corresponding parts as those of the conventional example and the first and second embodiments are designated by the same reference numerals, and the illustration and description thereof will be omitted. In the figure, reference numeral 4 denotes liquid such as food scraps and soy sauce scattered from the object to be heated is attached to the power supply port 21,
It is a substantially L-shaped power supply port cover provided so as not to enter, and its upper surface 4a is inserted into the insertion port 5 formed in the upper part of the power supply port 21 and mounted in the heating chamber. The power feed port cover 4 is effective in preventing liquid-like foreign matter from entering the power feed port 21 side due to gravity after being attached to the side plate 20a.

According to the third embodiment, even if liquid foreign matter adheres to the upper portion of the power supply port 21 of the side plate 20a and drips due to gravity, it will not enter from between the power supply port cover 4 and the side plate 20a. Can be prevented.

Fourth Embodiment FIG. 5 is a cross-sectional view of essential parts showing the structure of a cover pressing member of a high-frequency heating device according to Embodiment 4 of the present invention. The same or like parts as those of the conventional example or the first to third embodiments are designated by the same reference numerals and the description thereof will be omitted. The overall configuration is similar to that of the third embodiment, and the power supply port cover 4 is provided so that liquid such as food scraps and soy sauce scattered from the object to be heated does not adhere to or enter the power supply port 21. Reference numeral 6 denotes a cover pressing member that presses the power feed port cover 4 provided on the upper portion 24a of the waveguide 24, and includes a fixing plate 7 provided on the upper portion 24a of the waveguide 24, a spring 8 fixed to the fixing plate 7, The fixed spring 8 is provided with a contact portion 9 which is provided at the tip of the fixed spring 8 and is in contact with the upper surface 4a of the power supply port cover 4 and which is made of an elastic body. The upper surface 4a of the power supply port cover 4 inserted into the insertion port 5 has a cover pressing member 6
Fixed by. Further, the cover pressing member 6 is configured to hold down the inserted power supply port cover 4 and to pull out the power supply port cover 4 by applying an appropriate force.

According to the fourth embodiment, it is possible to prevent liquid-like foreign matter from adhering to the upper portion of the power supply port 21 of the side plate 20a, and to prevent dripping due to gravity from entering between the power supply port cover 4 and the side plate 20a. You can Further, the cover pressing member 6 improves the mounting property of the power supply port cover 4, and since the mounting and dismounting is easy, the mounting property is good and the cleaning property can be expected to be improved.

Embodiment 5. FIG. 6 is a main-portion cross-sectional view showing the structure of the cover pressing member of the high-frequency heating device according to the fifth embodiment of the present invention. The same or like parts as those of the conventional example or Embodiments 1 to 4 are designated by the same reference numerals, and the description thereof will be omitted. The overall configuration is similar to that of the second embodiment, and the power supply port cover 4 is provided so that liquid such as food scraps and soy sauce scattered from the object to be heated does not adhere to or enter the power supply port 21. Reference numeral 6a is a plate-like cover retainer made of an elastic material, which is a cover retainer member for retaining the power feed port cover 4 provided on the upper portion 24a of the waveguide 24.

According to the fifth embodiment, it is possible to prevent liquid-like foreign matter from adhering to the upper portion of the power supply port 21 of the side plate 20a, and to prevent dripping due to gravity from entering between the power supply port cover 4 and the side plate 20a. You can Also, the plate-shaped cover retainer 6a
This improves the mountability of the power supply port cover 4, and
Since it is easy to put on and take off, it is easy to put on and take off, and it is expected that the cleaning ability will be improved.

Sixth Embodiment FIG. 7 is a perspective view of essential parts showing a structure of a power supply port cover of a high-frequency heating device according to a sixth embodiment of the present invention. The same or corresponding portions as those of the conventional technique and the first to fifth embodiments are designated by the same reference numerals, and the illustration and description thereof will be omitted. In the figure, 10 is a power supply port cover provided so that liquid such as food waste and soy sauce scattered from the object to be heated does not adhere to or enter the power supply port 21,
Reference numeral 12 denotes an upper rail and a lower rail provided above and below the power supply port 21 of the side plate 20a of the heating chamber. The power supply port cover 10 is slid between the upper rail 11 and the lower rail 12,
It is installed in the heating chamber.

According to the sixth embodiment, the upper rail 11,
The lower rails 12 can enhance the effect of preventing food dust and the like from entering from the upper and lower portions, respectively, and can simplify the work of attaching and detaching the power feed port cover 10 to improve the cleaning property.

Embodiment 7. FIG. 8 is a perspective view of essential parts showing the structure of a cover pressing member of a high-frequency heating device according to Embodiment 7 of the present invention. Prior Art and Embodiments 1 to 6
The same or equivalent parts are denoted by the same reference numerals,
Illustration and description are omitted. The overall configuration is similar to that of the sixth embodiment. Reference numeral 8 is a fixed spring provided on the upper rail 11, and 9 is an abutting portion made of an elastic body provided at an end portion of the fixed spring 8. The abutting portion abuts the power feed port cover 10 to feed power by the biasing force of the fixed spring 8. The mouth cover 10 is being held. The cover pressing member is composed of a fixed spring 8 and a contact portion 9. The cover pressing member is configured to press the power supply port cover 10 and remove the power supply port cover 10 with an appropriate force.

According to the seventh embodiment, the upper rail 11 enhances the effect of preventing food dust or the like from entering from the upper portion and simplifies the attaching / detaching work of the power supply port cover 10, thereby improving the cleaning property. Can be increased. Further, there is an effect that the power supply port cover 10 can be more securely fixed.

Embodiment 8. FIG. 9 is a perspective view of a main part showing a structure of a power supply port cover of a high frequency heating device according to a seventh embodiment of the present invention. The same or corresponding parts as those of the conventional technology and the first to sixth embodiments are designated by the same reference numerals, and the illustration and description thereof will be omitted. In the figure, 13 are fixed columns provided on the upper and lower portions of the power feed port cover 10, and are attached to the power feed port cover 10, for example. Reference numerals 14 and 15 denote an upper rail and a lower rail, which are provided above and below the power supply port 21, respectively, and have a substantially semi-cylindrical shape opened to a size into which the fixed column 13 can be inserted. As shown in the figure, the power supply port cover 10 is mounted in the heating chamber by inserting the fixed columns 13 into the upper rail 14 and the lower rail 15.

According to the eighth embodiment, the upper rail 14 enhances the effect of preventing food dust and the like from entering from above, and simplifies the attaching / detaching work of the power supply port cover 10, thus improving the cleanability. Can be increased. Further, since the side plate 20a does not have a corner portion, the side plate 20a can be cleaned more easily.

Ninth Embodiment FIG. 10 is a perspective view of a main part of a high-frequency heating apparatus according to Embodiment 9 of the present invention, and FIG. 11 is a flow chart for explaining the operation of the cover detecting means.
The same or corresponding portions as those of the conventional technique and the first to seventh embodiments are denoted by the same reference numerals, and illustration and description thereof will be omitted. In any of the first to seventh embodiments, since the power supply port cover can be attached and detached, the user forgets to attach the power supply port cover after cleaning, and the product is operated without the power supply port cover, and food waste and the like are removed from the waveguide. May break into. Therefore, in the present embodiment, in order to prevent the operation in which the power supply port cover is forgotten to be attached, a cover detection unit that detects the presence or absence of the power supply port cover is provided. In addition, although this Embodiment demonstrates using the structure of the feed port cover 10 of Embodiment 6, it is not restricted to this, It is applied also to the feed port cover shown in other embodiment. Is.

In the figure, reference numeral 16 is a cover detecting means for detecting the presence or absence of the power supply port cover 10 composed of a micro switch or the like. When the power feed port cover 10 is normally attached, one end of the power feed port cover 10 turns on the micro switch of the cover detection means 16, and it is determined from the signal that the micro switch is attached.

Next, the operation of the cover detecting means 16 will be described with reference to FIG. In step 101, detection of the presence or absence of the power supply port cover 10 is started. In step 102, it is determined from the signal from the cover detection means 16 whether or not the power supply port cover 10 is attached. If there is no attachment signal, it is determined that the power supply port cover 10 is not attached, power supply to the high-frequency oscillator 3 is stopped (step 103), and the user is notified (step 105).
If there is a signal from the cover detection means 16 in step 102, it is determined that the power supply port cover 10 is attached, and power supply to the high frequency oscillator is permitted (step 104).

The user may be notified by a buzzer, a lamp mounted on the operation panel, or an LCD. When the attachment / detachment of the power feed port cover is detected, when the power feed port cover is not attached, the power supply to the high frequency oscillator is prevented and a means for notifying the user is provided.

Further, although the micro switch is used as the cover detecting means in FIG. 10, any means can be used as long as it can detect that the power supply port 21 has the power supply port cover.
The structure is not limited to this, and for example, a piezoelectric sensor or the like may be used.

According to the ninth embodiment, the cover detecting means is provided to detect the presence / absence of the power supply port cover, and when the power supply port cover is not attached, the power supply to the high frequency oscillator is prevented and the user is prevented. Since the means for notifying the user is provided, it is possible to prevent forgetting to attach the power supply port cover and ensure safety.

Embodiment 10. FIG. 12 is a perspective view of essential parts showing the structure of a power supply port cover of a high-frequency heating device according to Embodiment 10 of the present invention. Prior Art and Embodiment 1
7 to 7, the same or corresponding portions are denoted by the same reference numerals, and illustration and description thereof will be omitted. In the present embodiment,
The structure of the power supply port cover 10 according to the sixth embodiment will be described, but the structure is not limited to this, and the power supply port cover according to another embodiment is also applicable. In the figure, 17 is a grip provided on the power supply port cover 10.

Since the power supply port cover 10 is generally a thin flat plate, there is a problem that it is difficult to hold it by hand. In the tenth embodiment, since the grip 17 is provided so that the user can easily hook the power supply port cover 10 with his / her finger, the attaching / detaching operation can be facilitated and the convenience of the attaching / detaching at the time of cleaning can be enhanced. Although the grip 17 is provided in parallel with the power supply port cover 10 in FIG. 12, the grip 17a may be provided perpendicularly to the power supply port cover 10 as shown in FIG.

[0038]

In the high frequency heating apparatus according to the present invention, the power feed port cover is detachably attached to the heating chamber, and foreign matter is inserted into the outer peripheral portion of the power feed port when attached to the wall surface of the heating chamber. Since the prevention part is provided, there is an effect of sealing the periphery of the power supply port and preventing liquid such as food scraps and soy sauce from entering between the power supply port and the power supply port cover and the wall surface of the heating chamber. Further, since the power supply port cover can be easily attached and detached, the cleaning property is improved.

Further, when the foreign matter insertion prevention part is inserted, a power supply port cover pressing member for contacting the foreign matter insertion prevention part and fixing the power supply port cover to the heating chamber is provided. Further, not only the effect of preventing liquid such as food scraps and soy sauce from entering between the power supply port cover and the wall surface of the heating chamber, but also the effect of improving the mountability of the power supply port cover. Further, since the power supply port cover can be easily attached and detached, there is an effect that the cleaning property is also improved.

Further, the detection means for detecting the presence / absence of the power supply port cover is provided, and the high frequency oscillator is not operated when the power supply port cover is not attached based on the signal from the detection means. It is possible to prevent forgetting to put on and improve safety.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts showing a structure of a power supply port cover of a high-frequency heating device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of FIG.

FIG. 3 is a perspective view of a main part showing a structure of a power supply port cover of a high-frequency heating device according to a second embodiment of the present invention.

FIG. 4 is a main part perspective view showing the structure of a power supply port cover of a high-frequency heating device according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts showing the configuration of a cover pressing member of a high-frequency heating device according to Embodiment 4 of the present invention.

FIG. 6 is a cross-sectional view of essential parts showing the configuration of a cover pressing member of a high-frequency heating device according to a fifth embodiment of the present invention.

FIG. 7 is a perspective view of relevant parts showing a structure of a power supply port cover of a high-frequency heating device according to a sixth embodiment of the present invention.

FIG. 8 is a perspective view of a main part showing a configuration of a cover pressing member of a high-frequency heating device according to a seventh embodiment of the present invention.

FIG. 9 is a perspective view of essential parts showing the structure of a power supply port cover of a high-frequency heating device according to a seventh embodiment of the present invention.

FIG. 10 is a perspective view of essential parts of a high-frequency heating device according to a ninth embodiment of the present invention.

FIG. 11 is a flowchart illustrating an operation of the cover detection unit shown in FIG.

FIG. 12 is a perspective view of relevant parts showing a structure of a power supply port cover of a high-frequency heating device according to a tenth embodiment of the present invention.

FIG. 13 is a perspective view of a principal part showing another structure of the power supply port cover of the high-frequency heating device according to the tenth embodiment of the present invention.

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

FIG. 15 is a perspective view of a main part of FIG.

[Explanation of reference numerals] 1 power supply port cover, 1a foreign matter intrusion prevention plate, 2 insertion port, 3 power supply port cover, 4 power supply port cover, 5 insertion port, 6 cover pressing member, 7 fixing plate, 8 spring, 9
Abutment part, 10 power supply port cover, 11 upper rail, 12
Lower rail, 13 fixed column, 14 Upper rail, 15
Lower rail, 16 cover detection means, 17 grips,
20 heating chamber, 20a side plate, 21 power supply port, 22
High frequency oscillator, 23 antenna, 24 waveguide, 25
Mounting table, 26 heated object, 27 rotary plate, 2
8 motors, 29 power supply port covers, 30 fasteners.

Continued front page    (72) Inventor Masafumi Nagata             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. (72) Inventor Kenichi Ito             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. (72) Inventor Ichiro Masuda             1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1728               Within Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Kazuhiro Kameoka             1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1728               Within Mitsubishi Electric Home Equipment Co., Ltd. F-term (reference) 3K086 AA05 BA08                 3K090 AA06 AA11 AB01 BA01 DA01                       FA10                 3L086 AA01 BA08 BB12 CB20 DA01                       DA08

Claims (3)

[Claims] 1. A heating chamber for heating an object to be heated, a high frequency oscillator for oscillating a high frequency in the heating chamber, and a high frequency oscillated from the high frequency oscillator provided on a wall surface of the heating chamber is supplied to the heating chamber. In a high-frequency heating device comprising a power supply port and a power supply port cover provided so as to cover the power supply port, the power supply port cover is removably attached to the heating chamber, and on a wall surface of the heating chamber. A high-frequency heating device, characterized in that a foreign matter intrusion preventing portion which is inserted into the outer peripheral portion of the power supply port when mounted is provided. 2. A power supply port cover holding member for fixing the power supply port cover to the heating chamber by contacting the foreign matter insertion prevention unit when the foreign substance insertion prevention unit is inserted. 1. The high frequency heating device according to 1. 3. A detection means for detecting the presence / absence of the power supply port cover is provided, and the high frequency oscillator is prevented from operating when the power supply port cover is not attached, based on a signal from the detection means. Claim 1 characterized by the above-mentioned.
Alternatively, the high-frequency heating device described in 2.