JP3246082B2 - Cooking device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device,
Especially for seafood frozen cutting which requires the most uniform heating
Until the meat and frozen meat are sufficiently satisfactory.
Also related to a configuration that increases the uniformity of heating by high-frequency electromagnetic waves
It is. [0002] As means for thawing frozen food, high-frequency heating is used.
Heat has a characteristic such as short time, but on the other hand,
Defrosted state and degree of high-frequency heating is defrosted
Is heated 1000 times more,
When it is thawed, it is extremely heated and boiled
The disadvantage is that the other parts are still iced
Yes, so make sure the high-frequency heating uniformity is good enough
Otherwise, satisfactory thawing performance cannot be obtained. Conventionally, an object to be heated in a heating chamber is uniformly heated.
A number of heating methods have been proposed to disrupt high-frequency electromagnetic waves.
Stirring blade method to stir or rotary mounting table to rotate the object to be heated
Method or a method of rotating an antenna that radiates electromagnetic waves
Some have been proposed. Combine them and stir
A system equipped with both a blade system and a rotary mounting table system
There is also. [0004] A typical example of this is Japanese Patent Publication No. 60-25875.
A rotating mounting table is provided on the bottom of the heating chamber as shown in
Stirring blades are placed at the rear of the chamber to
The aim is to make the heating uniform. [0005] As shown in FIG.
A transfer table 34 is provided. Texture of back wall 35 of heating room
A metal electric wave stirring blade 37 is provided in the
Through a waveguide 39 provided on the upper wall 38, the heating chamber 33
The electric wave radiated into the inside is stirred by the electric wave stirring blade 37.
The rotating table 34 is rotated while rotating the object 40 to be heated.
To achieve uniform heating. However, in this configuration, the waveguide
High-frequency electromagnetic radiation radiated into the heating chamber 33 through the tube 39
Not all waves are stirred by the radio wave stirring blade 37
As a result, the stirring effect is not sufficient, and
Since the wave tube 39 is provided, the upper part of the load is often large.
Tend to be heated, and usually, electric heating
In an electric heating device with an additional heating device,
The configuration of the heater is difficult due to the waveguide 39 and sufficient heater
-There were problems such as difficulty in obtaining heating distribution. Further, US Pat. No. 2,748,239 is disclosed.
An opening for high-frequency electromagnetic waves is provided on the rear wall of the heating chamber as shown in
And install a radio wave stirring blade in the waveguide connected to the opening.
Rotating this to make the electric field of the high-frequency electromagnetic wave in the heating chamber uniform
However, an opening is provided behind the heating chamber.
The heated part behind the object to be heated
Radio frequency stirring blades
The same tendency does not change even if the magnetic wave is agitated.
Some parts are boiled in thawing, etc., which requires uniformity of electromagnetic waves
Some parts were still ice. Further, US Pat. No. 4,136,271 discloses
For detailed books, an antenna that emits high-frequency electromagnetic waves at the top
And a radio-wave stirring blade that stirs high-frequency electromagnetic waves
A method of arranging a rotary mounting table on a surface has been proposed. Only
In this method, the antenna and the radio wave stirring blade are close to each other
Therefore, the stirring effect of the radio wave stirring blade is sufficient,
Because the feeding part is at the top, it reaches the center of the rotating
It is difficult to heat the heating table between the center and the outer
Lance is difficult to remove, and the outer peripheral part is always heated
, And as a result, uniform heating could not be achieved. or
If there is an electromagnetic wave supply at the top,
Waves once reflect off the side of the heating chamber and reach the surface of the rotating stage
The size of the heating chamber and the position of the upper supply
When it changes, the degree of heating near the surface of the rotary mounting table changes greatly.
Had the disadvantage of Also put milk etc. in a cup
When heating, the upper part is inevitably heated
The condition was also occurring. [0009] In each case, thawing is uniformly performed.
The level of uniformity of the electromagnetic waves had not increased to the level that came.
In addition, there was unevenness in general heating. The present invention solves the above problems.
The purpose is to decide. In other words, high-frequency heating equipment
To be boiled when thawing fish meat
Provides a heating device that can be thawed without ice and without ice
The purpose is to do. [0011] The present invention is also applicable to warming milk and the like.
The disadvantage of uneven heating that the upper part is hotter,
Eliminates the disadvantage that the corners are strongly heated when heating hot objects
The porpose is to do. [0012] The present invention additionally provides a heating cooker.
Heater can be easily configured,
An object of the present invention is to provide a heating device that is free from heat heating unevenness.
You. The present invention further provides a simple configuration,
Excellent standing, excellent durability and reliability, and abnormal use by the user
To provide safe and robust heating equipment
Target. [0014] To achieve the above object,
The heating cooker of the present invention had the following configuration. A heating chamber for heating an object to be heated is provided in the main body.
A high-frequency generator for generating high-frequency electromagnetic waves;
A waveguide for guiding the high-frequency electromagnetic wave of the raw device to the heating chamber
And a rotation that supports the object to be heated and rotates with the object.
Radio waves that stir high-frequency electromagnetic waves in the mounting table and the heating chamber
A stirring blade is provided, and a power supply port of the waveguide is provided on a side surface of the heating chamber.
And facing the power supply port, the waveguide is disposed in the waveguide.
An electric wave stirring blade is provided, and the periphery of the opening of the power supply port is
The distance from the outer periphery of the wave stirring blade differs depending on the position of the peripheral edge.
Shape And Further, the radio wave stirring blade has a play on the rotating shaft.
A drive motor having
Tilt the axis of rotation of the motor slightly upward from the horizontal
It was configured to be fixed to. Further, the waveguide accommodates the radio wave stirring blade.
It has a radio wave stirring blade chamber for storing
A projection is provided on a part of the radio wave stirring blade chamber wall to be an attachment part,
A gap is provided between the driving motor and the stirring blade chamber.
It was configured to be able to. Further, the waveguide and the radio wave stirring blade chamber may be
And the electric wave disrupter facing the side wall of the heating chamber.
The power supply port was provided in the stirring blade chamber. The power supply port is provided at a rear wall of the heating chamber wall.
Provided, the power supply port was larger than the radio wave stirring blade
The configuration was adopted. In addition, the electric wave facing the electric wave stirring blade
The structure was such that the wave stirring blade chamber was painted. Further, the radio wave stirring blade has a low loss dielectric.
Having a plurality of overhangs.
Provided, the radio wave stirring blade has a wavelength of the high-frequency electromagnetic wave.
A plurality of mounting holes of approximately one-fourth or less are provided.
The overhang portion of the boss was inserted and fixed. Further, the radio wave stirring blade and the boss are externally connected to each other.
The projections and small holes are provided to prevent the occurrence of spills. The output shaft of the driving motor has low loss.
Made of a dielectric material, the cross section is configured to be non-circular, and the boss
Has a convex portion and elasticity, and the driving motor
A slit substantially parallel to the output shaft of the
The through-hole has the same shape as the cross section of the output shaft of the
A recess is provided near the tip of the output shaft of the motor,
Are configured to fit into the projections. The radio wave stirring blade has a substantially fan shape.
With a plurality of stirrer blades. Also, the stirrer blade of the radio wave stirring blade may be used.
The configuration was such that a second stirrer blade was provided at the tip. According to the present invention, the electromagnetic stirring blades are provided on the rotary mounting table and the side of the heating chamber.
Arrange the roots and provide a power supply port on the front of the
Change the shape of the power port to the distance between the tip of the radio wave stirring blade and the edge of the power supply port.
Shapes with different separation, that is, shapes other than circles such as squares
To emit high frequency electromagnetic waves up, down, left and right by radio wave stirring blades
The object to be heated can be made uniform by
The degree is dramatically improved. Even if the rotary mounting table is slightly displaced,
It just hits. Rotation center of rotary mounting table and electromagnetic stirring blade
By making the center line of the rotation center of the root approximately coincide, the rotation
The effect of the radio wave stirring blade on the object to be heated on the mounting table is the most
growing. The power supply port cover is used for food waste and steam in the heating chamber.
To prevent the waveguide from entering
There is no deformation by hitting the stirring blade. Further, by forming the cover with glass,
Thus, the rotating state of the radio wave stirring blade can be visually confirmed. The power supply port cover has elasticity on the outer peripheral end surface.
Encapsulation performance of power supply port cover is improved by covering with frame
Make sure that the frame projects from the power supply port cover toward the heating chamber.
Due to this, the rotary mounting table does not directly hit the power supply port cover
Even if it hits, the frame body becomes a cushioning material and the power supply port cover
Deformation is prevented. Printing on the surface of the glass power supply port cover
The rotation stirrer blades are clearly visible and
The disadvantageous part of the wave stirring blade can be hidden. The rotation axis of the drive motor is directed slightly upward.
By doing so, the rotating shaft faces downward due to backlash of the rotating shaft.
To prevent the electromagnetic stirring blades attached to the rotating shaft from tilting.
Can be stopped. [0033] Between the electric wave stirring blade chamber and the driving motor
By providing a space, the heat of the heating chamber is transferred to the drive motor.
It can be prevented from being transmitted. The waveguide and the electromagnetic wave stirring blade chamber are integrally formed.
Therefore, a heating chamber and a waveguide can be easily configured. The power supply port is configured to be larger than the radio wave stirring blade.
Therefore, there is a gap between the power supply port and the electromagnetic stirring blade.
Frequency electromagnetic waves can be efficiently radiated into the heating chamber,
Also, it was found that the radio wave stirring blade could be easily incorporated into the heating chamber.
come. The electric wave stirring blade chamber faces the electric wave stirring blade.
Since the parts are painted, the insulation strength between the two is high
Prevents sparks (spark discharge) of high-frequency electromagnetic waves between the two
Can be stopped. In addition, the appearance of the electromagnetic stirring blade is also painted
Better by color. An overhang is provided on the boss to take out the electromagnetic stirring blade.
Insert the overhang into the hole and rotate it a little to make the boss
Can be fixed to the electromagnetic stirring blade. Also, the mounting hole is
Because it is less than one quarter of the length,
This can prevent abnormal heating of sparks and bosses. Further, the small hole of the boss and the projection of the radio wave stirring blade
It does not come off because it engages. Slit on boss
The through hole becomes slightly larger, so it is driven from the heating chamber side
Can be fixed simply by pushing it into the rotating shaft of the motor
The boss may come off from the rotating shaft due to the concave part of the rotating shaft and the convex part of the boss.
And not. The electric wave stirring blade is a stirrer having a substantially fan shape.
Since the blades are provided, the gap between the stirrer blades is almost fan-shaped.
Become. High-frequency electromagnetic waves are radiated from this gap into the heating chamber.
You. Therefore, since this gap rotates, high-frequency electromagnetic waves
Radiating into the heating chamber while rotating, making the distribution in the heating chamber uniform
Can be achieved. A second stirrer blade is provided at the tip of the stirrer blade.
Radiation efficiency between stirrer blades is improved because roots are provided.
The electric field at the tip of the stirrer blade is weakened at the same time
Can be prevented. Embodiments of the present invention will be described below with reference to the drawings.
I will tell. In the present invention, the side of the heating chamber is a rotating chamber.
The wall of the heating chamber perpendicular to the surface of the mounting table. In the present invention
The effect is almost the same even if the power supply port is provided on either side
But the most practical, the rear wall (as opposed to the door)
The case where the power supply port is provided on the (surface) will be described. FIG. 1 is a horizontal sectional view of a cooking device according to the present invention.
FIG. Put food etc. on the bottom of the heating chamber 1 and rotate
The rotary mounting table 2 is provided, and the rear wall 3 of the heating chamber is substantially horizontal.
A high-frequency generator 4 is provided in a portion extending in the direction of
An opening serving as a substantially rectangular power supply port 5 is provided in the rear wall 3 of the heat chamber.
ing. In the vicinity of the power supply port 5, a metallic radio wave stirring blade
6 is provided and rotated by a driving motor 7.
It is. High-frequency electromagnetic waves emitted from the high-frequency generator 4
Is guided by the waveguide 8 toward the radio wave stirring blade 6,
After being stirred, it is radiated from the power supply port 5 into the heating chamber 1.
You. The power supply port 5 is provided with heat resistance with little radio wave loss.
It is composed of loose, for example, borosilicate glass
A power supply port cover 9 is provided so that food waste and the like can be used for the radio wave stirring blade chamber 1.
It is prevented from flying inside 0. 11 is silicone rubber
Frame, etc., fitted around the power supply port cover 9
And fixed to the power supply port 5 on the rear wall 3 of the heating chamber.
It acts as a ceiling. Also the power supply
When the heater is heated, the heat in the heating chamber 1 is supplied to the mouth cover 9.
Insulation to prevent escape into the wave stirring blade chamber 10
It also has a role. Also, the waveguide 8 and the radio wave
The partition 12 of the stirring blade chamber 10 is formed by an integral throttle.
ing. 13 is an opening / closing mounted on the front opening of the heating chamber 1
It is a free door. When heating food in a heating chamber, it is natural that
It is necessary to heat all the width and height uniformly. Rotating loading
The food placed on the table 2 is high frequency electromagnetic waves in the heating chamber.
Circumferentially heated in order to rotate in strong and weak
However, uneven heating tends to occur in the radial direction. Beside the back of the heating chamber 1
High frequency electromagnetic waves from the attached high frequency generator 4
The heating chamber 1 passes through the waveguide 8 and extends horizontally from the rear feed port 5.
Supplied to At this time, the heating pattern of the rotary mounting table 2 is
Naturally, the food near the power supply port 5 is strongly heated.
It is heated as if it had been etched. That is, the heating intensity
Becomes weaker as the distance from the power supply port increases. This heating
When the rotation table 2 is rotated, the pattern is
Heating pattern that eliminates uneven heating
Heat unevenness in the radial direction is not eliminated. Electromagnetic stirring blade
When the root 6 rotates, the high-frequency electromagnetic wave
As the state of distribution of the radiation intensity to the heating chamber 1 changes,
The heating intensity pattern that has been patched
Change). Therefore, heating unevenness in the radial direction is almost uniform
Become. FIG. 2 is a longitudinal sectional view of FIG.
-, 15 and 16 are lower heaters, each of which is an orb in the heating chamber
Heating is also possible. 17 according to the present invention
At the mounting portion of the drive motor 7, the radio wave stirring blade chamber wall 1
2 is squeezed in a convex shape, and the driving motor 7
Prevents close contact with the Nemuro. When closely attached, heater
-Radiated from inside the heating chamber 1 during heating
Heat and conduction provided through the radio wave stirring blade chamber wall 12
The temperature of the drive motor 7 rises due to heat, and the internal gears and gears
Grease, etc. must be heat resistant.
It becomes a top. It is located on the upper and lower parts of the drive motor 7
Cooling openings 18 and 19 are provided in the outer box at the location. Natural convection
The wind of the motor flows like the thick arrow in the figure, so the drive motor 7
Is cooled. In addition, by providing the throttle unit 17,
The tip of the fixing screw 20 of the motor 7 is an electromagnetic stirring blade.
6, the high-frequency power supplied into the waveguide 8
There is no danger of sparks due to magnetic waves. The high frequency electromagnetic wave is generated by the rotation of the radio wave stirring blade 6.
High frequency electromagnetic waves from the horizontal direction by the electromagnetic stirring blade 6
Allocated in the heating chamber 1 in a well-balanced manner like a thin arrow
I do. Therefore, high loads such as warm milk
Even if it is, the upper part is not heated very strongly
Heated uniformly. FIG. 3 shows a vertical cross-sectional view of FIG.
The rotary mounting table 2 is made of a low-loss dielectric such as pottery.
And an object to be heated (not shown)
You. Under the rotary mounting table 2, a rotary mounting table is rotated.
Arrange the turntable motor 47 and turntable
The rotation axis of the motor 47 is used to rotate the rotary table 2.
Table 48. The waveguide 8 is wide at one end, and
A wave stirring blade 6 is housed therein to form a radio wave stirring blade chamber 10.
I have. FIG. In 3, the power supply port 5 has a power supply port cover.
Although attached, it will be described with the state removed for the sake of explanation. The power supply port 5 is slightly larger than the radio wave stirring blade 6.
Radio wave stirring blade 6 can be easily attached from the front of the heating chamber
At the same time, it efficiently supplies high-frequency electromagnetic waves to the heating chamber.
The length of the high-frequency electromagnetic wave
You. The outer periphery of the radio wave stirring blade 6 is smaller than the power supply port 5.
Between the power supply port 5 and the radio wave stirring blade 6
There is a gap through which the waves pass. The radio-wave stirring blade 6 is composed of four substantially fan-shaped
Clearance between each stirrer blade because of the
Also have a substantially sector shape. The power supply port 5 has a substantially square shape.
Are slightly arcuate. From high frequency generator 4
High frequency electromagnetic wave passes through the waveguide 8 and enters the radio wave stirring blade chamber 10
Propagate. Here, the electric wave stirring blade 6 was formed in a substantially sector shape.
High-frequency electromagnetic waves are radiated from the gap into the heating chamber in the direction of the arrow.
It is. Of course, the outer peripheral portion of the stirrer blade 49 and the power supply port 5
High-frequency electromagnetic waves are radiated into the heating chamber from the gap
However, because the gap is narrow, the roughly fan-shaped gap is much
More. The high-frequency electromagnetic waves from the substantially fan-shaped gap are shown in FIG.
3 is emitted in the direction of the arrow. Here, the electromagnetic stirring blade 6 rotates
High frequency electromagnetic waves are dispersed to every corner of the heating chamber
Is done. When the power supply port 5 is circular, the heating chamber is a rectangular parallelepiped.
So high-frequency electromagnetic waves must reach the corner of the heating chamber
By making the power supply port 5 into a substantially square shape
High frequency electromagnetic radiation from the corner of the feed port 5
And high-frequency electromagnetic waves reach the corners of the rectangular parallelepiped
Dispersion of the radiation of the radio wave stirring blade 6 over the entire heating chamber
The effect is increased, and the uniformity of the object to be heated is improved. The circular arc at the corner of the substantially square power supply port 5 is as follows:
For adjusting the degree of high-frequency electromagnetic wave radiation to the corner of the heating chamber
At the same time, the power supply port cover 9 is made of low-loss dielectric glass or the like.
When making it into a shape, the corner of the power supply port cover 9 should be arcuate
The power supply port cover 9 is easy to mold because the grit glass flows easily.
No. FIG. 4 is an enlarged view of FIG.
A rotating shaft of the motor 7 for passing through the rotating shaft 21
To prevent radio wave leakage from the opening 22, tetrafluoroethylene
It is made of heat-resistant resin such as ren. Point of rotation shaft 21
At the end, a radio wave stirring blade 6 is fixed via a boss 23.
I have. Generally, the rotation axis of the motor should not interfere with rotation.
And a clearance between the motor bearing (not shown)
Is provided, but the coefficient of thermal expansion is large, and the molding accuracy is also high.
If the rotating shaft is made of resin that is difficult to come out,
And the play is big. Mount such things horizontally
In this case, the heavy metal electromagnetic wave
Since the stirring blade 6 is fixed, the weight of the rotating shaft 21
Is lowered as represented by θ ° in the figure. Then
Distance a between lower end of wave stirring blade 6 and wave stirring blade chamber wall 12
Becomes smaller than the distance b in the horizontal state, and the radio wave stirring blade 6
Discharge phenomena due to high-frequency electromagnetic waves tend to occur at the tip.
Therefore, in the present invention, the mounting portion 17 of the driving motor 7 is tilted.
To compensate for the downward angle θ ° of the rotating shaft 21,
The stirring blade 6 is parallel to the wall 12 of the radio wave stirring blade chamber 10.
It is devised as follows. FIG. 5 shows the structure of the waveguide section of the present invention.
Therefore, reference numeral 24 denotes the waveguide section 8 and the radio wave stirring blade chamber 10,
This is a one-piece diaphragm made of metallic material.
Call it a tube. 25 is a portion where a part of the rear wall 3 of the heating chamber is extended.
The antenna of the high-frequency generator 4 forms one surface of the waveguide.
An insertion hole 26 is provided. The integrated waveguide 24,
The rear wall 3 of the heating chamber is fixed by spot welding or the like,
The wave stirring blade chamber 10 is configured. Easy cleaning of heating room
In order to do this, those that apply fluorine coating etc. to the heating chamber wall,
In the direction of the arrow with the waveguide and the rear wall of the heating chamber spot-welded
Spray the atomized paint from α. Above integrated waveguide
The tube 24 and the rear wall 3 of the heating chamber are fixed to the upper wall 2 of the heating chamber.
7, side walls 28, 28 ', bottom wall 29, etc., and caulking or
It is fixed by spot welding or the like. At that time, indicate by hatching
Parts 30 and 31 enter the inside of the integrated waveguide 24
Caulking or spot welding becomes impossible,
In the present invention, integrated waveguide
Punch for crimping or welding electrode inserted into tube 24
A possible hole 32 is provided. The hole 32 leaks radio waves.
So that it is as small as possible and
It is necessary to make it a protruding shape and to close it with a radio wave prevention bracket from the outside
There is no configuration. FIG. 6 shows a cross section of a main part of the power supply port 5.
The power supply port cover 9 made of low dielectric loss glass is provided around the end face.
The heating chamber 1 is supplied by an elastic frame 11 so as to cover the surroundings.
The frame 11 is fixed and attached to the power outlet 5,
It is configured to protrude from the mouth cover 9 toward the heating chamber.
I have. The power supply port cover 9 has a concave shape when viewed from the heating chamber 1.
The surface opposite to the heating chamber 1 has a low dielectric loss
The printing layer 40 printed with ink is provided. this is
In order for the user to check the rotation of the radio wave stirring blade 6 during use
It is. FIG. 7 is a perspective view of the radio wave stirring blade of FIG.
You. The length of the long side of the mounting hole 41 is high in the radio wave stirring blade 6.
Multiple mounting holes that are approximately one-fourth or less of the wavelength of the
Have. The length of the long side of this mounting hole 41 is
If the wavelength is more than one-quarter of the wavelength of the magnetic wave, the performance of the radio wave distribution in the heating chamber
Not only deteriorates, but also the high frequency electromagnetic wave
Sparks can occur. The two mounting holes 41 are provided on the boss 23.
By inserting two overhangs 42 and rotating them by a predetermined angle,
The wave stirring blade 6 and the boss 23 are fixed. Small hole of boss 23
43 enters the projection 44 of the radio wave stirring blade 6 when attached, and
Not to be. Also, the rotation of the drive motor 7
The fixing between the rotation shaft 21 and the boss 23 has a substantially oval cross section.
Rotating shaft 21 made of a low-loss dielectric
It is made of a low-loss dielectric having a slit 45 inserted substantially in parallel.
It is fixed by inserting the formed boss 23. Reference numeral 51 denotes a substantially fan-shaped end of both sides of the stirrer blade 49.
A second stirrer blade provided at the end,
Increase the efficiency of magnetic waves radiating from the gap between stirrer blades
With the high-frequency electromagnetic wave at the tip of the stirrer blade 49
It plays a role in preventing sparks. FIG. 8 is a sectional view after the assembly of FIG. Times
A convex portion 46 is formed on the boss 23 at a fitting portion between the transfer shaft 21 and the boss 23.
Are provided, and the bosses are aligned with the corresponding recesses of the rotating shaft 21.
23 does not come off. As described above, according to the present invention, the rotary mounting table
And the electric wave stirring blade on the side of the heating chamber.
A power supply port is provided on the front, and high-frequency electromagnetic waves from the side of the power supply port
Waves are radiated up, down, left, and right into the heating chamber by the electromagnetic stirring blades
The rotation of the rotating table causes the uniformity of the object to be heated.
Is dramatically improved. In other words, Citation 1 (Japanese Patent Publication No. 60-2)
5875), the power supply port is at the top of the heating chamber.
Non-uniformity in the vertical distribution that the top of the object is heated strongly
Yes, in Reference 2 (US Pat. No. 2,748,239) after the heating chamber
There is a power supply port in the section, so if the rear of the heating chamber is heated
Non-uniformity tended to occur in the planar distribution. further
Reference 3 (USP 4,136,271) is similar to Reference 1
The upper part is heated strongly because the radiating antenna is on the upper part
There was a disadvantage. On the other hand, in the present application, both the horizontal distribution and the vertical distribution
Good uniformity allows frozen food to be thawed without failure.
When heating milk etc. with a cup, the upper part is too hot
There is no. Further, high frequency is applied to the object to be heated directly from the side of the heating chamber.
Uniform even if the dimensions of the heating chamber are slightly distorted due to the irradiation of electromagnetic waves
Has little effect on performance. In the embodiment, the shape of the power supply port is substantially square.
As described above, if the production
Is good, but not limited to
Of course, any shape other than
is there. Further, the lower end face of the power supply port is located at a position
Positioning the rotary mounting table incorrectly due to the
Even when it is inserted, it hits the frame and the power supply port cover is damaged
Never. A part for inserting the rotation axis of the rotary mounting table and a radio wave stirring
The rotation axis of the blades crosses at a substantially right angle,
High-frequency electromagnetic waves are emitted almost symmetrically with respect to the rotation axis of the table.
So that when the rotating table rotates, the center of the rotating table
The difference between the heating of the part and the surroundings is small. The number of rotations of the rotary mounting table and the radio wave stirring blade
Position of the rotating table is negative due to the
Radiation of high-frequency electromagnetic waves from electromagnetic stirring blades even when loaded
The vertical and horizontal loading
The heat uniformity is the same and uniform regardless of the position of the load. Also, the backlash is generated by the backlash of the rotating shaft of the driving motor.
Configuration that corrects the inclination of the electromagnetic stirring blades.
The discharge phenomenon in the blade radial direction can be suppressed, and
Prevents deterioration of stirring performance due to tilting of the electromagnetic stirring blade
You. Further, the electric wave stirring blade chamber, the waveguide and the like are heated.
Since it is a structure provided on the side, it can be used for high-frequency
Even without any restrictions on the heater configuration
A high-frequency heating device that provides high-frequency electromagnetic heating can be realized, and
, Power supply port cover, frame, mounting method of drive motor, etc.
The heat-resistant specification of parts due to the heat generated by heating the heater
It is possible to prevent a cost increase for the measure. Further, the waveguide and the radio wave stirring blade chamber are squeezed together.
And the high-frequency generator mounting part also has a heating chamber.
With a simple configuration that only extends a part of the rear wall, a waveguide
And a punch or electrode rod for spot welding or spot welding
The heating chamber is easy to assemble, and
Can be easily and cheaply constructed on the body. Further, the power supply port is larger than the size of the radio wave stirring blade.
By making them as large or larger than
The wave stirring blade is attached to the drive motor from the heating chamber side.
Because of this, the shape of the integrated waveguide is simplified. Heating room
If installation from the side is not possible,
After fixing the drive motor and the electromagnetic stirring blade to the wave tube,
A configuration that attaches to the rear wall of the heat chamber with screws, or an integrated
The drive motor mounting part of the wave tube is removed together with the electromagnetic stirring blade
In case of screw fixing to make lid structure etc.
Is a radio wave unless fixed at a pitch of 20mm to 30mm
Because of the problem of leakage, a large number of
It is necessary to fix the screws of
You. Generally, a high-frequency heating device with a heater is used.
In order to provide easy cleaning of the heating chamber,
Although heat-resistant paint such as fluorine paint is often applied to the inside,
Make the power supply port larger than the radio wave stirring blade as in the invention.
In this way, for example, the integrated waveguide and
After painting by pot welding, spray painting
However, paint enters through the power supply port and
Since the opposing radio wave stirring blade chamber wall is painted, the insulation film
Is formed, and the effect of suppressing the spark of the electromagnetic stirring blade
Demonstrate. Further, the power supply port of the heating chamber is supplied with a strong glass supply.
As it is protected by the outlet cover, deformation of the radio wave stirring blade
Can be prevented. In addition, the power supply port cover
Cover with an elastic frame so that it protrudes from the power supply port cover.
In addition, the shape of the power supply port cover is concave and the heating chamber
Is fixed to the power supply port of
If you accidentally hit it, protect it with a frame and absorb the shock
Give me In addition, ink with low dielectric loss is placed on the surface of the power supply port cover.
The user is out of order and radio wave agitation
If the blade stops, you can find it immediately. The power supply port cover is not limited to glass, but may be ceramic,
Needless to say, the same effect can be obtained even if made with porcelain etc.
Nor. An elastic frame around the end face of the power supply port cover
Since it is attached through the body, the dimensional variation of the glass
And stable work can be performed. Power supply to the heating chamber through the power supply port cover via the frame
Since it is fixed to the mouth and attached, it has a sealing property and
Heat and steam from the drive motor, etc.
Insulation deterioration due to the above can be prevented, and generation of rust can be prevented. Further, the wavelength of the high frequency electromagnetic wave is applied to the radio wave stirring blade.
Multiple mounting holes of approximately one-fourth or less of
Radio wave agitation because multiple overhangs are inserted and fixed
The stirring effect of the blade will not be impaired, and the high
There is no spark due to wave electromagnetic waves. Also radio wave stirring blade
The root and boss can be easily attached and the number of parts is small
Inexpensive and easy to assemble. For fixing the output shaft of the boss and the driving motor
In addition, a slit is provided in the boss, and the rotation axis is
So it can be easily installed from the direction of the rotation axis.
Can be. The convex portion 46 of the boss matches the concave portion of the rotating shaft.
Therefore, no stress is applied to the boss. Therefore heating room
Even if the inside is heated with a heater, the boss will not be deformed.
And the boss does not fall off. As described above, according to the present invention, the heating chamber
A rotary mounting table is provided on the bottom of the unit, and a power supply port is located beside the heating chamber
High-frequency electromagnetic waves are supplied from the side of the power supply port,
Various foods can be provided by installing radio wave stirring blades near the mouth.
, A uniform heating state is obtained. For example, cow
If the milk is warm, the difference between the upper and lower
Small heating difference between center and surroundings
No. In addition, frozen food can be thawed evenly,
5 ° C without simmering due to abnormally heated vertices and sides
Defrosts to an even degree. The uniformity of the inside of the refrigerator has been dramatically improved.
Frozen foods such as meat and fish that once require performance are boiled and iced
It can be thawed uniformly to room temperature without any change. Also milk
When the throat is heated, the upper part of the container will not get hot
No. Also, even if the object to be heated is placed at the center of the
There is no difference in the quality because the distribution is good. Power supply port
Is almost square, so high-frequency electromagnetic waves can spread to the upper and lower corners of the heating chamber.
It's terrible. Even if the rotary mounting table is slightly displaced,
Do not damage or deform the electromagnetic stirring blade
The distribution performance does not easily deteriorate. The rotation center of the rotary mounting table and the rotation of the radio wave stirring blade
Stirring of radio wave stirring blades because extension lines of center of rotation coincide
The effect is large for the rotary mounting table. The object to be heated is covered with the electric wave stirring blade by the power supply port cover.
It does not hit the roots, and food debris adheres to the electromagnetic stirring blades,
Extremely safe and reliable because it does not burn when heated
high. Since the power supply port cover is glass, the
The rotation status can be checked well, there is a visual effect and it should stop.
Failures can be easily found when cooking
Can be prevented. The frame is directly connected to the heating object or the rotary mounting table through a power supply port.
Power supply port cover even if it hits to prevent it from hitting the cover
Impact can be reduced. Visual effect by printing a part of the power supply port cover
Raise the radio wave stirring blade to cover the inconvenient part
The burrs are improved and the product value is improved. Attach the drive motor slightly upward
Distribution stirrer blades do not tilt, making the distribution uniform.
The distance between the radio wave stirring blade and the chamber wall of the radio wave stirring blade is stable
Since the separation is the same as the top and bottom, sparks can be prevented and reliability can be prevented
Will be higher. The gap between the electric wave stirring blade chamber and the driving motor
It is not necessary to increase the heat resistance of the drive motor
Use inexpensive bearings and grease for the moving motor.
Since then, the cost will not be high. The assembly of the heating chamber and the waveguide is simple. Salary
A power port is provided on the rear wall of the heating chamber, and the power port is larger than the radio wave stirring blade.
Motor with good radiation efficiency and driving the electromagnetic stirring blade
It can be easily assembled from the front of the heating chamber when attaching to the heating chamber. [0095] The part of the wall of the electromagnetic stirring blade chamber is painted.
As a result, the insulation performance with the radio wave stirring blade is improved, and the spa
To ensure reliability even when the heating chamber is emptied.
it can. Also, the appearance of the radio wave stirring blade is good. If the boss and the radio wave stirring blade can be easily fixed,
Both mounting holes for fixing are 1/4 of the wavelength of high frequency electromagnetic waves
Because it is below, the spark was prevented at this part and the boss melted
It does not burn and has high reliability. The boss and the radio wave stirring blade do not come off.
Because it can be easily fixed to the boss and the rotating shaft of the drive motor
Easy to assemble. The electromagnetic stirring blade is a plurality of substantially fan-shaped stirrer blades.
Since it has a root, high-frequency electromagnetic waves are applied through the fan-shaped gap.
Radiated while rotating toward the heat chamber,
The distribution becomes uniform and the thawing etc. can be boiled or remain ice
Thaw evenly to room temperature with no residue. Also, the back of milk etc.
When heating a heated object having a high temperature, the difference between the upper and lower temperatures is small. At the tip of the stirrer blade, a second stirrer blade
Radiation of high-frequency electromagnetic waves from fan-shaped gaps
Can be performed efficiently, so that the output loss is small. Also,
Prevent sparks caused by abnormal electric field concentration at the tip of the blade
Rukoto can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a horizontal sectional view of a cooking device according to an embodiment of the present invention. FIG. 2 is a side sectional view of the cooking device. FIG. 3 is a front vertical sectional view of the cooking device. FIG. 4 is a side view showing a drive motor mounting portion of the cooking device. FIG. 5 is a perspective view of a waveguide and a rear wall of a heating chamber of the cooking device. FIG. 6 is a power supply port cover of the cooking device. 7 is a perspective view of the electric wave stirring blade of the cooking device. FIG. 8 is a sectional view of the electric wave stirring blade of the cooking device after assembly. FIG. 9 is a sectional view of the conventional cooking device. Description: 1 Heating chamber 2 Rotary mounting table 3 Rear wall 4 High frequency generator 5 Power supply port 6 Electric wave stirring blade 7 Driving motor 8 Waveguide 9 Power supply port cover 10 Radio wave stirring blade chamber 11 Frame 12 Radio wave stirring blade chamber wall 21 Rotating shaft 22 Opening 23 Boss 40 Printing layer 41 Mounting hole 42 Overhang 43 Small hole 44 Projection 45 Slip 46 convex portion 49 stirrer blades 51 second stirrer blade

──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number Japanese Patent Application No. 4-140238 (32) Priority date June 1, 1992 (1992.6.1) (33) Priority claim country Japan (JP) (31) Priority claim number Japanese Patent Application No. 4-140239 (32) Priority date June 1, 1992 (1992.6.1) (33) Priority claim country Japan (JP) (31) Priority claim number Japanese Patent Application No. 4-164484 (32) Priority date June 23, 1992 (1992.6.23) (33) Priority claiming country Japan (JP) (72) Inventor Mitsuo Akiyoshi 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Address Matsushita Electric Industrial Co., Ltd. (56) References JP-A-63-178487 (JP, A) JP-A-51-29739 (JP, A) Full-scale production 50-19053 (JP, U) Real-life development 57 147 595 (JP, U) Actually open 1987-43201 (JP, U) Actually open 1974-1247 (JP, U) Actually open 1984 59-23190 (JP, U) Akira 57-158195 (JP, U) Tokuoyake Akira 60-25875 (JP, B2) (58 ) investigated the field (Int.Cl. ^7, DB name) H05B 6/72 - 6/74 F24C 7/02

Claims (1)

(57) [Claim 1] A heating chamber for heating an object to be heated in the main body,
A high-frequency generator that generates high-frequency electromagnetic waves, a waveguide that guides the high-frequency electromagnetic waves of the high-frequency generator to the heating chamber, a rotary mounting table that supports the object to be heated, and rotates together with the object, and the heating chamber. A wave stirring blade for stirring the high-frequency electromagnetic wave, a power supply port of the waveguide is arranged on a side surface of the heating chamber, and the radio wave stirring blade is provided in the waveguide so as to face the power supply port. The distance between the peripheral edge of the opening of the mouth and the outer periphery of the radio wave stirring blade is made different depending on the position of the peripheral edge, and the radio wave stirring blade is attached to the rotating shaft.
The drive motor having a motor
Tilt the rotating shaft of the motor for running
Heating cooker that has been fixed . 2. The waveguide has a radio-wave stirring blade chamber for accommodating the radio-wave stirring blade, and a convex portion is provided on a part of a wall of the radio-wave stirring blade chamber serving as a mounting portion for the driving motor. a drive motor, a heating cooker of claim 1, wherein the gap is configured to allow between the stirring blade chamber. Wherein an integral structure with said radio wave stirring blade chamber and the waveguide, the heating cooker of claim 1, wherein provided with the feed port to the radio wave stirring blade chamber facing the heating chamber sidewall. Wherein said power feeding port is provided on the rear wall of the heating chamber wall, the feed port cooking device according to claim 1, wherein is larger than the radio wave stirring blade. 5. A heating cooker of claim 1, wherein the painted on a portion of the radio wave stirring blade chamber opposed to the radio wave stirring blade. 6. The radio wave stirring blade has a boss made of a low loss dielectric, the boss is provided with a plurality of overhangs, and the radio wave stirring blade has a wavelength of about four minutes of the wavelength of the high frequency electromagnetic wave. 1 is provided a plurality of the following mounting holes, heating cooker of claim 1, wherein inserting the projecting portion of the boss is fixed to the mounting hole. 7. The heating cooker according to claim 6, wherein the radio wave stirring blade and the boss are provided with projections and small holes for preventing separation. 8. An output shaft of the drive motor, wherein the output shaft of the drive motor is made of a low-loss dielectric, has a non-circular cross section, the boss has a convex portion and has elasticity, And a through hole having the same shape as the cross section of the output shaft of the drive motor, a recess is provided near the tip of the output shaft of the drive motor, and the protrusion of the boss fits into the recess. The heating cooker according to claim 7, which is configured. 10. A heating cooker of claim 1, wherein having a plurality of stirrer blades the radio wave stirring blade having a substantially fan shape. 11. The cooking device according to claim 10, wherein a second stirrer blade is provided at a tip of the stirrer blade of the radio wave stirring blade.