JPS6135674B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high frequency heating device.

Conventionally, in this type of field, it has been practically impossible to provide a heater that moves vertically in parallel, for example, in the heating chamber. The reason for this is that the heater must pass through the wall of the heating chamber and lead out to the outside, but in this case, there is a risk that the heater will become a penetrating body and high frequency waves will leak outside from the lead-out part. This is because until now no means have been provided to effectively and reliably prevent the danger.

The present invention aims to solve these technical problems and eliminate the numerous problems that conventional high-frequency heating devices had.

The present invention will be described below with reference to an illustrated embodiment. In FIGS. 1 and 2, a heater is used as an example of the penetrating body K in this embodiment.

That is, 1 is the main body of the heating device, 2 is a metal outer case forming the outer shell of this main body, 3 is a heating box with a heating chamber 4 inside, 5 is a metal front plate attached to the front of this heating box, and 6 8 is a door for opening and closing the front opening 7 of the heating chamber 4; 8 is an operation panel provided with a timer (not shown) for controlling heating time and a knob 9 for vertically moving a heater 15, which will be described later; 10 is a heating chamber 4; It is a metal turntable provided at the inner lower part, and is removably placed on the upper surface of the drive board 11 to which the rotational force of an external motor (not shown) is transmitted, so that the rotational force is transmitted. .

Reference numeral 12 denotes a protruding support part integrally formed corresponding to both side wall surfaces of the heating chamber 4, 13 a metal rectangular plate placed on the support part as needed, 1
Reference numeral 4 denotes two vertically long through holes formed on the back surface of the heating chamber 4, and the width dimension of these through holes is set slightly larger than the diameter of heaters 15 and 16, which will be described later, and the vertical length is A. is set, for example, to 3 times the fundamental wavelength of the high frequency used.

Reference numerals 15 and 16 indicate rod-shaped heaters such as sheathed heaters. Both ends of the upper heater 15 protrude outside the heating chamber 4 through the through hole 14, and the lower heater 16 similarly extends from the heating chamber 4. It penetrates the wall surface and both ends are led out.

17 is a small hole formed in the upper side of the heating chamber 4;
Reference numeral 8 denotes an exhaust duct which has one end connected to the outside of this small hole and an opening at the other end that passes through the outer case 2 and communicates with the outside. Controls energization of heaters 15 and 16,
A temperature detection section P of a temperature controller (not shown) with a variable operating temperature is provided to maintain the inside of the heating chamber 4 at a desired set temperature.

19 is a metal partition plate attached to the outer surface of the through hole 14 corresponding to the entire length of the hole edge; 20 is a metal shielding plate similarly attached to the back of the heating chamber 4 so as to cover the through hole 14; A through hole 1 is provided between the plate 14 and the plate 14.
Centered on 4, diameter B is approximately 1/2 wavelength, depth C is approximately
A chiyoke chamber 22 (first radio wave leakage prevention chamber) having an inlet 21 at 1/4 wavelength is formed.

Reference numeral 23 denotes an elongated hole provided at the center of the back surface of the shielding plate 20, and the length D of this elongated hole is set to be close to 3/4 wavelength of the high frequency used, similarly to the through hole 14. Reference numeral 24 denotes a metal mounting plate (moving body) supported movably in the vertical direction by heat-resistant resin rollers 25 attached to both side edges, one on the top and one on the top.
It faces the back surface of the shielding plate 20 with a predetermined gap S therebetween. However, the mounting plate of the lever is dimensioned to always close the elongated hole 23 even if it moves up and down.

26 is a roller holder; 27 is a flat radio wave absorber located on both sides of the gap S, forming a narrow passage 28 on the back side of the shielding plate 20 that is continuous with the gap S and extends in a direction perpendicular thereto; For example, it is made of ferrite-containing plastic or the like, and is fixed to the mounting plate 24 by a metal plate 29 provided on the back side. 30 is a through hole having the same width as the elongated hole 23, and 31 is a mounting plate 24 corresponding to this through hole.
A circular case made of metal attached to the
is approximately 1/2 wavelength, the depth F is approximately 1/4 wavelength, and has a fitting hole 32 for the terminal portion of the heater 15 in the center. Therefore, there is an inlet 33 between the mounting plate 24 and the case 31.
A chiyoke chamber 34 (second radio wave leakage prevention chamber) is formed.

Reference numerals 35 and 36 indicate metal guide plates that the roller 25 comes into contact with, and one guide plate 35 is directly attached to the outer case 2.

37 is a terminal box into which the terminal part of the heater 16 is inserted; 38 is a metal terminal box attached to the case 31; inside is a metal terminal box into which the terminal 39 of the heater 15 is detachably inserted and the power supply is connected; Power supply plate 4
0 and a pair of porcelain fillers 41 that sandwich the power supply plate from above and below.

42 is a power supply connection line, 43 is a high frequency inlet provided at the center of the ceiling surface of the heating chamber 4, and 44 is a waveguide, which contains a magnetron oscillation part (not shown).

45 is a cover that seals the inlet 43, and 46 is a reflector plate made entirely of press-molded stainless steel plate, the entire surface of which is coated with a black coating by enamel or painting.

As shown by the imaginary line in FIG. 2, 47 is a notch-shaped supply port provided at a position away from directly above the heater 45, and the above-mentioned introduction port 43 is located directly above this. The reflecting plate 46 is formed in advance so that its ceiling surface becomes higher as it goes from the supply port to the periphery.

Reference numeral 48 denotes a hanging portion formed in a series over almost the entire circumference of the reflecting plate 46.

The heater 15 is moved downward from the highest position shown in FIG. They are mechanically connected by an expansion transmission mechanism such as.

50 is located above the mounting plate 24 and the outer case 2
An exhaust hole 51 formed on the top surface is an insulator in which the heater 15 is attached to the reflector plate 46.

The operation of the above configuration will be explained next. When the knob 9 of the operation panel 8 is now moved from the position shown in FIG. Mounting plate 24
is guided by guide plates 35 and 36 via rollers 25 and descends vertically. When the position of the knob 9 is determined, the position of the mounting plate 24 is also held at a predetermined position, so that the object to be heated, such as food placed on the turntable 10, can be quickly and uniformly baked from the outside using high heat. , If the high frequency oscillation source (not shown) is further driven in this state, the inlet 43
Since the high frequency waves introduced from the supply port 47 are mainly irradiated to the space below the reflection plate 46, the object to be heated such as food is heated and cooked from the inside at a high speed.

During such high-frequency heating, the high-frequency waves tend to leak to the outside from the through-holes 14, but in this embodiment, the high-frequency waves that come out of the through-holes 14 first enter the check chamber 22 and are extinguished there. If high-frequency waves that are not extinguished even with this leak leak from the elongated hole 23 of the shielding plate 20, the high-frequency waves will either enter the choke chamber 34 and be extinguished, or they will try to exit through the gap S and the narrow passage 28. Since the radio wave absorber 27 is continuously provided to face the direction of the leakage and is sufficiently longer than the full length D of the elongated hole 23, the leakage is absorbed by the radio wave absorber 27.

Therefore, the high frequency waves that try to leak from the through hole 14 are reliably extinguished or absorbed.
Problems such as leakage causing malfunction of electronic components built into the main body 1 or harming the human body are prevented.

Furthermore, since a gap S or a passage 28 is formed between the shielding plate 20, the mounting plate 24, and the radio wave absorber 27, the radio wave absorber 27 may be deformed or burnt out by receiving the heat of the heating chamber 4. It is possible to maintain a stable radio wave absorption effect over a long period of time.

Furthermore, since the connection portion of the heater 15 to the power source is provided outside the heating chamber 4 and outside the terminal chambers 23 and 24, there is almost no influence of leakage high frequency waves on the terminal chamber H. , the intrusion of these leaked high frequency waves into the terminal chamber H is suppressed to nearly zero. Therefore, problems such as generation of sparks due to high frequency between the terminal 39 of the heater 15 and the power supply plate 40 or noise entering the power supply side via the power supply connection line 42 can be prevented.

Note that if the filler 41 is provided in the terminal chamber H as in the embodiment, or if it is provided inside the terminal chambers 22 and 34 (not shown), the heater 15
It is difficult for the high heat in the heating chamber 4 and the steam generated during cooking to be transmitted to the terminal 39 side of the terminal 39, which prevents corrosion of the terminal 39 part and deterioration of insulation, etc., so a safe and reliable power supply state can be obtained for a long period of time. .

FIG. 3 shows a second embodiment of the present invention, in which the penetrating body K is connected to a metal reflecting plate 46.
This is a support shaft 52 that supports the. 53 is a reflecting plate 46
The back piece is continuous and bent at the rear end, and even when the support shaft 52 is located at the uppermost position, the through hole 14
The dimensions are set in advance so as to cover the front surface of the front surface along its entire length with a predetermined gap. 54 is a small hole formed in this back piece, into which the tip of the support shaft 52 is fitted.

Reference numeral 55 is a high-frequency transmitting heat-resistant cover that seals the supply port 47 provided at the center of the reflector 46, and 56 is a socket for connecting a power source to the terminal portion of the heater 15 attached to the lower surface of the reflector 46. It is fixed at 46.

57 is a small hole provided in the ceiling surface of the heating chamber 4, 58 is a small hole also provided in the reflective plate 46, and 59 is an automatic winding type provided outside the heating chamber 4, which is passed through the small holes 56 and 57. The power supply connection line electrically connects the cord reel 60 and the socket 56, and the entire circumference is covered with a flexible shield cover (not shown) that does not transmit high frequencies.

61 is a radio wave absorber attached to the end of the support shaft 52 so as to surround it, and 27 is a radio wave absorber attached to the heating chamber 4 side surface of the mounting plate 24 so as to face the upper, lower, left and right surfaces of the shielding plate 20, respectively. It is an absorber.

Other than the above, the structure is the same as that of the first embodiment, so the same or corresponding parts will be given the same reference numerals and the explanation will be omitted.

With the above configuration, if the mounting plate 24 is now moved downward, the reflection plate 46 and the heater 15 will move down together, but at this time the power supply connection line 59
are drawn out from the cord reel 60 one after another, so there is no obstruction to the lowering operation. If the reflector plate 46 is set at a desired position and the heater 15 is energized, the powerful radiant heat from the heater can quickly heat and cook the food.

In this case, the heat rays from the heater are reflected by the reflecting plate 46, and the hanging portion 48 is formed to prevent the hot air from rising naturally, so that heat can be efficiently applied to the object to be heated.

Furthermore, the leakage prevention effect of high frequency waves leaking from the through hole 14 when high frequency heating is performed is the same as that of the first embodiment, so the explanation will be omitted.
In this embodiment, the front surface of the through hole 14 is always covered by the adjacent back piece 53, although it is limited to the area below the support shaft 52, so that the amount of high frequency irradiation to the through hole 14 is attenuated in advance. Moreover, since the radio wave absorber 27 is provided so as to surround the entire circumference of the shielding plate 20, there is a more reliable effect of preventing crack leakage. Note that the back piece 53 of the reflective plate 46
This also has the effect of preventing dirt such as oil scattered from food products from entering the rear surface of the heating chamber 4 or into the through hole 14.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, the penetrating body K is a support shaft 63 of a mounting table 62 on which the rectangular plate 13 and the object to be heated are placed. This support shaft is made of a U-shaped metal rod with both ends protruding from inside the heating chamber 4 to the outside through a through hole 14, and a plurality of horizontal rods 64 are passed over the upper surface of the U-shaped metal rod to which it is fixed. A mounting table 62 is configured. Although the heater 15 penetrates the rear surface of the heating chamber 4 and has a terminal portion protruding to the outside, it cannot be moved up or down. Other than the above, the configuration is the same as that of the first embodiment described above, so a description thereof will be omitted.

In this embodiment, the high frequency waves that would otherwise leak out from around the support shaft 63 through the through hole 14 are prevented from leaking as in the first embodiment, and the mounting table 62 is parallel to the vertical direction. Since it can be moved, it is possible to bake with high heat using the heaters 15 or 16, or to bake while delicately adjusting the amount of heat from above and below at an appropriate place between the heaters 15 and 16. This is a significant improvement.

In this embodiment, since a considerable weight may be placed on the mounting table 62, it goes without saying that the diameter of the support shafts 63, their supporting method, number, etc. should be appropriately set so that the mounting table 62 does not fall.

FIG. 5 shows a fourth embodiment of the present invention. In this embodiment, the penetrating body K detects the temperature of the object to be heated and the energization state of the heaters 15, 16 or the high frequency oscillation source (not shown). This is a state detector 65 designed to control.

In other words, the condition detector 65 consists of a main body 66 made of a metal tube that is provided so as to pass through the through hole 14, and a temperature measuring section 67 formed at the end of this main body. For example, a positive temperature coefficient thermistor or the like whose specific resistance value changes depending on the height is housed.

68 is Chiyoke room (first radio wave leakage prevention room) 2
The depth C of the chamber 22 is set to be shorter than 1/4 of the fundamental wavelength of the high frequency in the atmosphere because the wavelength of the high frequency in this insulating material is different from that in the air. has been done.
42 is a power supply connection line, 69 is a radio wave absorber attached to the outer surface of the shielding plate 20, and the mounting plate 24 moves up and down in contact with or close to this back surface. 46 is a reflection plate supported by the heater 15 fixed to the rear wall surface of the heating chamber 4. Note that the configuration other than the above is the same as that of the first embodiment described above, so a description thereof will be omitted.

Since this embodiment has the above-described configuration, if food is placed on the turntable 10 and the temperature measuring section 66 of the condition detector 65 is inserted into the food, and high frequency heating is performed in this state, the temperature of the food will be rises to a preset temperature, the status detector 65
Since high-frequency oscillation is automatically stopped based on a signal from This can be prevented. Furthermore, since the status detector 65 can be moved up and down by external operation, there is no danger of causing burns or the like by attempting to operate the status detector 65 during heating, allowing the heating process to proceed to the next stage efficiently. It has the effect of being able to do the following.

Although the state detector 65 in this embodiment detects temperature, it goes without saying that it may also detect other elements, such as humidity.

Furthermore, since leakage high frequency waves are less likely to be transmitted to the power supply side through the state detector 65, there is no problem such as confusion in control signals, and reliable control can be performed.

FIG. 6 shows a fifth embodiment of the present invention, in which the penetrating body K is a support shaft 71 of a partition 70 that substantially divides the interior of the heating chamber 4 into two upper and lower chambers. That is, the partition body 70 is formed from a metal plate and has a planar shape that is slightly smaller than the planar shape of the heating chamber 4 . The metal support shaft 71 is fitted into a small hole 73 in a hanging portion 72 formed at the peripheral edge of the partition body 70.

74 is a supply port 75 formed in the center of the partition body 70
76 is a ring-shaped radio wave absorber attached to the approximately middle part of the support shaft 71 so as to surround it; 77 is a spout formed at the lower side of the heating chamber 4, This is to introduce water vapor produced by

Note that 56, 57, 59, and 60 are sockets, small holes, power supply connection lines, and cord reels, respectively, constructed similarly to those of the second embodiment described in FIG. Furthermore, since the configuration other than the above is the same as that of the first embodiment, a description thereof will be omitted.

Since this embodiment has the above configuration, the mounting plate 24 is now biased to set the partition body 70 at an appropriate height, and the heaters 15 and 16 are energized.
The heating space defined below by 0 is heated in a short time and reaches a high temperature, allowing desired roasting and cooking to be performed.

Furthermore, if steam is introduced from the spout 77, steam cooking can be similarly performed. Therefore, depending on the set position of the partition 76, the time required to start cooking using electric heat and steam can be significantly shortened. In addition, since high frequency waves can be irradiated from the supply port 75 to the space below regardless of the position of the partition body 70, the object to be heated can be quickly heated from the inside, and this works well with the external heating method using the heaters 15, 16 and steam. You can heat and cook efficiently and evenly.

FIG. 7 shows a sixth embodiment of the present invention. In this embodiment, the penetrating body K is a heater 15 as in the embodiment described in FIGS. 1 and 2. 79 and 80 are metal guide plates attached to both sides of the rear wall of the heating chamber 4 via a plate 78 made of a low thermal conductivity material; 81 is a metal guide plate also fixed to the center of the rear wall of the heating chamber 4; 82 is a heat-resistant plastic roller attached to both ends of the mounting plate 24 via holders 85, and 83 is a metal roller that faces the guide plates 79, 80, 81 over the entire length of the shielding plate 20. This is a flat radio wave absorber made of ferrite-containing plastic or the like with a gap 84 secured between the plate 29 and the plate 29 .

Reference numeral 47 designates a through-hole supply port provided at the center of a metal reflecting plate 46 provided above the heater 15.

Other than the above, the structure is the same as that of the first embodiment shown in FIGS. 1 and 2, so the explanation will be omitted.

In the above configuration, this embodiment is particularly different from the previous embodiments in terms of effectiveness.
Since they are provided in stages, even if high frequency waves leak from the chiyoke chamber 22, they can be captured more reliably.

In addition, the installation of the radio wave absorber 83 is
Since it uses 0.0 and 81, the configuration is simple.

As described above, the radio wave leakage prevention chamber 22 is connected to the heating chamber 4.
Although six embodiments of the present invention have been described in which the position is not changed with respect to the base plate, the present invention is not limited to the configurations of these embodiments. For example, in the first embodiment shown in FIGS. 1 and 2, the heater 15 itself is connected to the through hole 14.
However, even if the power supply connection line 42 passes through the through hole 14 portion, the same effect of preventing radio wave leakage can be expected. This also applies to the power supply connection line 42 of the fourth embodiment shown in FIG.

Also, as a result of experiments, the length A of the through hole 14 or the length D of the elongated hole 23 is 3/4 of the fundamental wavelength of the high frequency used.
High frequency leakage was the least when the wavelength was set to an odd multiple of 1/4 wavelength, such as 2x, 5/4x, 7/4x, etc., so it seems best to set it around this range.

Furthermore, when the mounting plate (moving body) 24 and the shielding plate 20 or the radio wave absorber 27 and the shielding plate 20 are in sliding contact, at least one of the contact surfaces between the two has a low coefficient of friction and is difficult to transfer heat. It may be coated with a material such as tetrafluoroethylene.

Next, several embodiments in which the radio wave leakage prevention chamber 22 is moved relative to the heating chamber will be described below.

That is, FIGS. 8 and 9 show a seventh embodiment of the present invention, and in this embodiment, the penetrating body K is a heater such as a sheathed heater.

Reference numeral 86 denotes a shielding plate made of a metal plate that is vertically provided so as to face the two through holes 14 formed in the rear wall of the heating chamber 4, and is provided so as to move vertically while contacting the outer surface of the heating box 4. It is being 2
2 is formed between the outer surface of the heating box 3 and the shielding plate 86, and has a width B with an inlet 21 or about 1/2 wavelength of the high frequency to be used centered on the through hole 14, and a depth C of the same width.
A radio wave leakage prevention chamber having a size slightly longer than 1/4, with an entrance 87 formed by bending the outer peripheral edge of a shielding plate 86 over the entire interior circumference, and a width J of 1/4 of the high frequency wavelength. A chiyoke chamber 88 having a length of 1/4 wavelength and a depth of 1/4 wavelength is formed. 2
Reference numeral 4 denotes a metal mounting plate superimposed on the back surface of the shielding plate 86, and is provided so as to be movable in the vertical direction by rollers 25.

Reference numeral 89 denotes a metal fitting attached to the outermost circumferential surface of the shielding plate 86 over its entire circumference, the tip end of which is attached to the heating box 3.
or the partition plate 92 described later. Reference numeral 90 denotes a flat radio wave absorber made of ferrite-containing plastic or the like attached over the entire length of the surface facing the circumferential surface of the shielding plate 86 of this metal fitting.
There is a gap 91 having a width of 1/4 wavelength of the high frequency.

Reference numeral 92 denotes two metal partition plates fixed and vertically provided from the upper surface to the rear surface of the heating box 3, each having a U-shape that opens in the direction of the shield plate 86 from the upper end to the inside so as to surround the shield plate 86. However, below this point, the cross-sectional shapes are opposite to each other.
However, the length of the partition plate of the lever is set in advance to a length that always covers the side surface of the shielding plate 86 even if it moves. 93 is a flat radio wave absorber attached to the surface facing the metal fitting 89 over the entire length of the partition plate 92, 94 is a gap formed between this radio wave absorber and the metal fitting 89, and 95 is a penetration provided in the shielding plate 86. The hole 30 is also a through hole provided in the mounting plate 24. Other than the above, the configuration is the same as that of the previous embodiment, so the explanation will be omitted.

Since this embodiment has the above configuration, the through hole 1
Even if high frequency waves leak from the radio wave leakage prevention chamber 22, since the shielding plate 86 is in full contact with the outer wall surface of the heating chamber 4 and the cutout plate 92, the high frequency waves will not leak from the radio wave leakage prevention chamber 22 to the outside through between these contact surfaces. There is almost no leakage, and most of the high-frequency waves that are about to leak enter the chamber 88 and are attenuated and extinguished. Furthermore, even if some of these high-frequency waves leak from between the shielding plate 86 and the heating chamber 4 or the partition plate 92, they will be absorbed by the radio wave absorber 90 when they enter the next gap 91, or will be extinguished by the chioke effect. However, since there is a radio wave absorber 93 next, leakage of high frequencies is substantially prevented.

The shielding plate 86 and the mounting plate 24 are equipped with a heater 15.
Since the through holes 95 and 30 are provided with a diameter larger than that of the heater 15 in order to insert and remove the heater 15 from the terminal box 38, it is possible that some high frequency waves leak from the through holes 95 and 30. Therefore, it is safe from them. Furthermore, if the heater 15 is not inserted or removed, the diameters of the through holes 30 and 95 can be made smaller and the heater 15 can be firmly fitted, so in this case, leakage of high frequency waves can be reliably prevented even without the check chamber 34. .

Naturally, this can be said even if the penetrating body K is not the heater 15 but something else.

FIG. 10 shows an eighth embodiment of the present invention, in which the penetrating body K is the state detector 65 explained in FIG.
.

Reference numeral 96 is an insulating material such as porcelain filled in the circular case 31, and is provided to prevent steam or the like from entering from the through hole 14 toward the fitting hole 32 side.

15 and 16 are heaters, both of which penetrate the left side wall of the heating chamber 4 and are connected to a power source outside thereof.

G is the shielding plate 86 and the heating chamber 4 or the partition plate 92
The gap M formed between them is also a gap provided so that the metal fitting 89 and the radio wave absorber 90 do not come into contact with the heating chamber 4 and the partition plate 92.

Other than the above, the configuration is the same as in FIGS. 8 and 9 except that the roller 25 is omitted from the mounting plate 24.

Since this embodiment has the above configuration, the shielding plate 8
6 and the metal fittings 89 come into contact with the heating chamber 4 and the partition plate 92, so there is no contact resistance, and therefore the mounting plate 24
It has the advantage of requiring less power to move.

In addition, even if a slight gap G or M is formed, high frequency waves are difficult to leak, and in addition, since it has a high frequency leakage prevention structure similar to the embodiments shown in Figs. 8 and 9, it is substantially High frequency leakage does not occur.

FIG. 11 shows a ninth embodiment of the present invention, in which the penetrating body K is the support shaft 71 of the partition body 70 as in the fifth embodiment (FIG. 6).

In this embodiment, especially the shielding plate 86 and the metal fittings 89
A heat-resistant, low-thermal-conductivity material, such as ethylene tetrafluoride material 30, is made of a material with a low coefficient of friction, and is made of a heat-resistant, low-thermal-conductivity material in a series across the heating chamber 4 and the partition plate 92 so that the heating chamber 4 and the partition plate 92 do not come into direct contact with each other. Since the structure is the same as that of the previous embodiment except that a thin film 97 of about 100 microns is formed, the explanation will be omitted.

According to this embodiment, leakage of high frequencies is prevented similarly to the ones in FIGS. 8 to 10, and the first
Similar to the one in Fig. 0, it has the advantage that the shielding plate 86 has good mobility, and since it is difficult to directly transmit heat to the shielding plate 86, the radio wave absorber 90, etc. from the outer wall surface of the heating chamber 4, there is no need to worry about overheating them. There is an advantage that there is no

As mentioned above, three embodiments in which the radio wave leakage prevention chamber 22 is movable have been described with reference to FIGS. 8 to 11, but various improvements can be made to these embodiments.

For example, the mounting plate 24 may be omitted in FIGS. 8 to 11, and the coating 9 in FIG.
7 may be an insulating anodic oxide film such as alumite. Further, in each of the embodiments, the check chamber 88 is formed within the radio wave leakage prevention chamber 22, but it is clear from the above description that this is not necessarily necessary.

Furthermore, as can be said for all the embodiments shown in FIGS. 1 to 11, the movement of the penetrating body K such as the heater 15 and the reflector plate 46 is not limited to manual operation, and is intended to be easily operated. It is clear that it is better to use a power source such as a motor.

Here, there are two types of configurations in which the radio wave leakage prevention chamber 22 as shown in FIGS. It seems that the former structure is slightly better in terms of high frequency leakage prevention effect in terms of the function of the radio wave leakage prevention chamber 22,
Also, as is clear from the drawings, there is no particular difference in effectiveness, except that the overall configuration can be made slightly smaller. Therefore, for example, by combining both methods, and taking the one shown in FIG. 8 as an example, a fixed radio wave leakage device as shown in FIG. By providing the blocking chamber 22, the high frequency leakage blocking effect is further improved.

As described above, the present invention provides a penetrating body in the heating chamber so as to pass through the through hole provided in the wall surface of the heating chamber, and also enables the penetrating body to move in the radial direction of the through hole. A radio wave leakage prevention chamber is installed to introduce high frequency waves leaked from the surrounding area.
Since the structure is configured so that high frequency waves do not leak from the surrounding area regardless of the movement of the penetrating body, by implementing this invention, new usage methods, power supply methods, and heating methods that were previously considered difficult can be realized, making it more efficient. There are great effects that can be obtained by using the present invention, such as efficient heating and cooking, effective control, and labor-saving heating and cooking.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a high-frequency heating device showing one embodiment of the present invention, FIG. 2 is a partially cutaway plan view thereof, and FIGS. 3 to 6 are other embodiments of the present invention. FIG. 7 is a partially cutaway side view of a high-frequency heating device showing an example, FIG. 7 is a partially cutaway plan view showing still another embodiment of the present invention, and FIG. FIG. 9 is a partially cutaway side view, FIG. 9 is a partially cutaway plan view thereof, and FIGS. 10 and 11 are partially cutaway side views showing still other embodiments of the present invention. In the figure, 1 is the main body, 4 is the heating chamber, 14 is the through hole, 1
5 is a heater (penetrating body), 20 is a shielding plate, 22 is a check chamber (first radio wave leakage prevention chamber), 24 is a mounting plate (moving body), 27 is a radio wave absorber, 34 is a check chamber (second radio wave leakage prevention chamber). 42 is a power supply connection line, 46 is a reflection plate, 52 is a support shaft (penetrating body),
59 is a power supply connection line, 61 is a radio wave absorber, 62 is a mounting table, 63 is a support shaft (penetrating body), 64 is a status detector, 69 is a radio wave absorber, 70 is a partition body, 71 is a support shaft (penetrating body) ), 76 is a radio wave absorber, 88 is a choke chamber, 83, 90, 93 are radio wave absorbers, and K is a penetrating body. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A long and narrow through hole is provided in the wall surface of the heating chamber to which high frequency waves are supplied, and a heat conductor is provided in the heating chamber so as to pass through this through hole, and a heat conductor is provided in the heating chamber corresponding to the through hole. A radio wave leakage prevention chamber is provided to the outside into which high frequency waves leaked from the through hole are introduced, and the leakage prevention chamber is configured to be penetrated by the penetrating body, and the penetrating body is configured to be movable in the radial direction of the through hole. In addition, a high frequency heating device characterized in that a movement range of the penetrating body is limited within the radio wave leakage prevention chamber. 2. The high-frequency heating device according to claim 1, wherein the penetrating body is a heater built into the heating chamber or a power supply connection line to the heater. 3. The high-frequency heating device according to claim 1, wherein the penetrating body is a state detector for the temperature or temperature difference of the object to be heated or a power supply connection line thereof. 4. The high-frequency heating device according to claim 1, wherein the penetrating body is a support shaft of a reflection plate provided in the heating chamber. 5. The high-frequency heating device according to claim 1, wherein the penetrating body is a support shaft of a table for recording a heated object provided in the heating chamber. 6. The high-frequency heating device according to claim 1, wherein the penetrating body is a support shaft of a partition that partitions the inside of the heating chamber into two or more chambers. 7. The high-frequency heating device according to claim 1, wherein the length of the through hole is set to be approximately an odd multiple of 1/4 of the fundamental wavelength of the high frequency used. 8 A long and narrow through hole is provided in the wall of the heating chamber where high frequency waves are supplied, and a penetrating body is provided in the heating chamber so as to pass through the through hole, and leakage from the through hole to the outside of the heating chamber corresponds to the through hole. A radio wave leakage prevention chamber into which high frequency waves are introduced is provided, the leakage prevention chamber is configured so that the penetrating body passes through it, and the penetrating body is configured to be movable in the radial direction of the through hole. A high-frequency heating device whose movement range is limited to the radio wave leakage prevention chamber, and further provided with at least one of another radio wave leakage prevention chamber or a radio wave absorber in the radio wave leakage direction from the radio wave leakage prevention chamber. . 9. The high-frequency heating device according to claim 8, wherein the penetrating body is a heater built into the heating chamber or a power supply connection line. 10. The high-frequency heating device according to claim 8, wherein the penetrating body is an element for detecting conditions such as temperature or humidity of the heated object or a power supply connection source thereof. 11. The high-frequency heating device according to claim 8, wherein the penetrating body is a support shaft of a reflection plate provided in the heating chamber. 12. The high-frequency heating device according to claim 8, wherein the penetrating body is a support shaft of a heated object monitoring stand provided in the heating chamber. 13. The high-frequency heating device according to claim 8, wherein the penetrating body is a support shaft of a partition that partitions the inside of the heating chamber into two or more chambers. 14 Using the length of the through hole 1/4 of the fundamental wavelength of the high frequency
9. The high-frequency heating device according to claim 8, wherein the high-frequency heating device is set to be approximately an odd number multiple of .