JP2000277251A - Wave guide device for heating apparatus using electromagnetic waves and plasma burner generating device using the wave guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly radiate electromagnetic waves from an electromagnetic wave generating device into a vessel of a heating apparatus utilizing electromagnetic waves and produce an intense plasma burner using the radiated waves. SOLUTION: A wave guide device for transmitting electromagnetic waves from an electromagnetic wave source into a heating vessel is equipped with an electromagnetic wave generating device 1, a cylindrical wave guide tube with the forefront cut aslant and arranged rotatably for transmitting the electromagnetic waves from the device 1, and a cabinet 2 for accommodating an object to be heated, which is irradiated with the electromagnetic waves from the wave guide tube, wherein the electromagnetic waves produced by the wave guide device are turned into intense plasma burner flames with the aid of a plasma burner generating means, consisting of a single electrode and a ceramic cylinder surrounding the forefront of the electrode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveguide device for propagating an electromagnetic wave from an electromagnetic wave source to the inside of a container of a heating device using an electromagnetic wave. The present invention relates to a waveguide device, a heating device using the waveguide device, and a device for generating a powerful plasma burner.

[0002]

2. Description of the Related Art Conventionally, a heating device provided with this type of electromagnetic wave propagation waveguide device includes, as shown in FIGS. 18 (a), (b) and (c).
The following are known. In other words, each heating device is a system in which the electromagnetic wave from the magnetron 1 is introduced from the upper part of the cabinet 2 through the waveguide 3.
(A) directly irradiates an object to be heated placed in a container of a heating device (not shown) from a waveguide, and (b) shows a case where the object to be heated is mounted on a rotating turntable 4. The method of heating uniformly, and the method of (c), in which the electromagnetic wave from the waveguide 3 is applied to the metallic rotating blades 5 to perform more uniform irradiation. In order to verify how uniform irradiation is achieved in these conventional methods, the following experiment was attempted. That is, the same amount of water is put into each of a plurality (five in the figure) of small containers S1 to S5 arranged as shown on the bottom of the cabinet or on the turntable, and an electromagnetic wave having an input of 100 V and an output of 500 W is applied. After heating for irradiation for 3 minutes, the temperature of water in each container was measured, and the temperature was as shown in the table shown in each figure. FIG. 7 is a graph showing the temperatures. As is clear from the graph, insufficient heating is obtained in the small container arranged in the center as compared with the small container arranged in the peripheral portion, and even in the turntable method of FIG. Sufficient results were obtained.

[0003]

As described above, the conventional heating apparatus utilizing electromagnetic waves has a disadvantage that uniform heating by sufficiently uniform electromagnetic radiation cannot be obtained. SUMMARY OF THE INVENTION An object of the present invention is to provide a heating device utilizing electromagnetic waves which solves the above-mentioned problems of the prior art, and further provides a waveguide device for a heating device and a waveguide device which exhibit the following remarkable effects. It is an object of the present invention to provide a fusion bonding heating device and a powerful plasma burner generating device utilizing the same. (1) Uniform radiation of electromagnetic waves into the cabinet becomes possible. (2) The cross-sectional shape of the waveguide is not limited to a conventional rectangular shape, but can be set to a circular shape, a polygonal shape, or the like. (3) Since the cross-sectional area of the waveguide can be set to be much smaller than that of the conventional one, it is effective for downsizing the electromagnetic wave heating device. (4) Heating and fusion bonding are possible even for a long object so that the object to be heated cannot be accommodated in the cabinet. (5) By using the toggle coupler, a desired waveguide device can be mounted on a desired cabinet. (6) A strong plasma burner flame is generated by the single electrode and the ceramic cylinder surrounding the tip.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a uniform radiation of electromagnetic waves by gently rotating a waveguide whose tip is cut obliquely. Is made possible. In order to support the rotating waveguide, it is effective to use a frusto-conical body to attach it to the side of the heating device. Furthermore, a small metal rotating blade is provided for diffusing and reflecting the electromagnetic wave on the inner surface of the cone, and more uniform electromagnetic wave diffusion is obtained by the reflection of the electromagnetic wave by the rotating blade. In addition, by using this electromagnetic device, it is possible to generate a strong plasma burner flame by absorbing electromagnetic waves by a single electrode and a ceramic tube surrounding the single electrode.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. Members that are the same as or equivalent to the members shown in the above-described conventional example are given the same reference numerals, and detailed descriptions thereof are omitted. FIG. 1 is a perspective view showing an embodiment of the present invention. One side surface of a cabinet 2 is, for example, 2450 generated by a magnetron oscillator 1.
A waveguide device D1 for uniformly radiating an electromagnetic wave (microwave) of MHz into the cabinet 2 is mounted. The detailed configuration of the waveguide device D1 is as shown in FIG.
The magnetron 1 is directly connected to the waveguide, and a metal coaxial antenna 6 for radiating electromagnetic waves is supported by a support 7 at substantially the center of a metal cylindrical waveguide 13.

The support 7 is made of, for example, Teflon, nylon or Duracon which does not absorb electromagnetic waves so as not to hinder the propagation of electromagnetic waves. A waveguide 13 whose tip is cut at an inclination angle of, for example, 5 ° to 45 °.
Is rotatably supported via a ball bearing 9 provided in a housing 8 and continuously rotated, for example, at about 15 revolutions per minute by a driving motor 10 via a driving gear 11. The rotation of the obliquely cut cylindrical waveguide allows the microwave from the magnetron oscillator 1 to be evenly propagated in the cabinet. The distal end of the waveguide 13 is disposed so as to be located inside the metal frustum cone 12. The opening of the conical body 12 is fixed to the side surface of the cabinet 2 without attaching a tilt angle. The cross-sectional shape of a cylindrical waveguide is not limited to a circle, but a rectangle, a polygon,
It may be a triangle.

FIG. 3 shows the case of a T-type waveguide device D2 in which the coupling type between the magnetron 1 and the waveguide 13 is a T-shape, and the oscillation axis 1A of the magnetron oscillator 1 is And the axis 13A. Incidentally, in the case of the linear waveguide device of FIG. 1, both axes coincide on one straight line.
It should be noted that even if the straight-line type waveguide device D1 in FIG. 1 is a T-type coupling type, exactly the same uniform effect as the waveguide device can be achieved.

[0008] The embodiment shown in FIG.
The figure shows a T-type waveguide device D3 having a frusto-conical body 12 at the tip thereof and small metal reflecting impellers 15A, 15 which are rotated by small motors 14A, 14B provided at two places of the cylindrical body. By means of the continuously rotating metal impeller, the electromagnetic waves can be more uniformly reflected and a uniform electromagnetic wave emission into the cabinet can be achieved. The impeller has, for example, a diameter of about 30-70.
Good results are obtained with a centimeter and a rotation speed of about 15-50 per minute. FIG. 5 is a schematic partial cross-sectional perspective view showing the T-type waveguide device D3 of FIG. 4 in more detail. The number of small reflecting impellers is not limited to two, and a plurality of small reflecting impellers can be installed. The cross-sectional shape of the waveguide 13 is not limited to a circle, but may be a square, a polygon, or a triangle. The waveguide device provided with the cone and the impeller is not limited to the T type, but may be a straight type.
In that case, it is necessary to install a metal antenna.

FIG. 6 shows a waveguide device D4 in which the magnetron oscillator 1 is directly connected to the frustoconical body 12. In this embodiment, the cone 12 is mounted at an angle θ ° from the cabinet outer surface so that electromagnetic waves can be radiated into the cabinet.
FIG. 7 shows the waveguide devices D1, D2, D3 of the present invention described above.
The results of comparative measurement of the uniformity of electromagnetic wave radiation, that is, the uniformity of heating, between D4 and the conventional device are shown in the graph. As is clear from the graph, in the waveguide devices D1 and D2, the measurement temperature in each of the small containers S1 to S5 became almost uniform, and extremely good results were obtained. On the other hand, in the case of the conventional example shown in FIGS. 14A, 14B and 14C, it is non-uniform as is clear from the graph.

FIG. 8 shows the waveguide devices D1, D2, D3, and D4 of the present invention described above with reference to FIGS. 5 is a table showing conditions of the inner diameter of the waveguide necessary to radiate the light to the waveguide. For example, the waveguide device D1 shown in FIG. 1 makes it possible to radiate light into the cabinet over a wide range having an inner diameter of a cylindrical waveguide of not more than 72 mm and 20 mm as is clear from the table, and it is impossible in the prior art. Such a waveguide having a small inner diameter can be used, and the effect of contributing to downsizing of the entire heating device is remarkable. The waveguide device D1 shown in FIG.
In the case where there is no coaxial antenna, it is impossible to radiate electromagnetic waves to the inside of the heating vessel as shown in FIG. 9 (f) in the table shown in FIG. The waveguide device D shown in FIG.
2 indicates that the inner diameter of the cylindrical waveguide is 30 as is clear from the table.
Radiation cannot be achieved with millimeters or less, but the effect that the diameter can be reduced to about 50 mm, which has not been possible in the past, is remarkable.

9 (a) to 9 (f), FIG. 10 (a)
11 (a) to 11 (f) and FIG.
Each of FIGS. 2 (a) to 2 (c) shows a schematic configuration of a total of 21 waveguide devices shown in the table of FIG. FIG. 13 shows an embodiment in which the waveguide device of the present invention is used for fusion bonding of a synthetic resin pipe tube. In the cabinet 2 in which the waveguide device D of the present invention is mounted, a pair of pipes made of a synthetic resin such as polyethylene, which are to be fusion-bonded to each other, are inserted through a pair of openings 2A and 2B provided in the cabinet. It is. If the pipes 16A and 16B are plastics used for water pipes, they are required to have an inner diameter of about 28 mm, a melting point of about 220 ° C., and a water pressure of about 25 kg / Cm. Reference numeral 17 denotes a cylindrical joint made of a material having substantially the same quality as the pipes for fusing and joining the pair of pipes 16A and 16B, that is, a material having substantially the same melting point. In two concave portions provided on the inner surface of the cylindrical joint 17, two annular dielectric heat generating materials 18A and 28A are provided between the inner surface of the joint and the end of the pipe for fusion-bonding the two. 18B is attached. Desirably, the thickness of the heating material is about 1.5 mm to about 2 mm. When the annular dielectric heating materials 18A and 18B generate heat by being irradiated with electromagnetic waves, both pipe ends and the joint 17 are heated to a melting point temperature of about 220 ° C. and both are uniformly fused,
Pipe joining is achieved.

This dielectric heating material is obtained by, for example, sintering a material having a mixing ratio shown in Tables 1 and 2 below into an annular shape. Tables 1 and 2 show the time required for the five kinds of materials to reach the melting temperature of about 220 ° C., and the temperature rise time is adjusted by mixing alumina, and by mixing silicon carbide. The shape of the annular (ring-shaped) material formed by sintering can be maintained without collapse. The polyethylene in the table is not essential since it can be replaced with a material substantially equal to the melting point of the pipe material and can be fused to each other by mutual melting of the pipe material and the joint material by heating. However, by mixing polyethylene, there is an effect that both are smoothly melted. Further, by coating or coating the entire surface of the ring-shaped sintered material with a resin having a melting point lower than the melting point of the resin pipe to be joined, more uniform and strong fusion can be achieved.

[0013]

[Table 1]

[0014]

[Table 2]

The above-described dielectric heating material is formed by annularly forming the mixture as described in Tables 1 and 2. However, the material is not limited thereto, and may have a pellet shape (granular shape), a tape shape, or a sectional shape. It may be T-shaped (for example, convenient for joining the joining end faces of pipes). Alternatively, the mixture may be mixed with a synthetic resin or water to form a paste. Further, it may be formed into a thread, cloth, or mesh. For example, a tape-shaped dielectric heating material is advantageous for repairing a hole in a pipe or repairing a scratch.

As described above, according to this embodiment, it is possible to sufficiently heat an object to be heated such as a long object such as a pipe (a long object which cannot be accommodated in a cabinet which is a heating container). Furthermore, it is also possible to perform continuous heat fusion bonding. In the case of a pipe for a water pipe, fusion that can sufficiently withstand a high pressure of 24 Kg / Cm by the joining method of this embodiment has a high heating efficiency because the waveguide device of the present invention has a high degree of electromagnetic wave radiation uniformity. This was achieved in a short time. In this embodiment, a long object to be heated has been described, but this embodiment is not limited to a long object and can be effectively applied to a case where two objects are heated and fused using a dielectric heating material.
Further, in the embodiment of FIG. 13, the case of the synthetic resin pipe has been described, but the material to be joined is not limited to the synthetic resin pipe, and may be a metal pipe or the like.
Further, the material may be a plate.

In the embodiment shown in FIGS. 14A and 14B, a waveguide having a rectangular cross section is attached to a truncated pyramid,
Further, a waveguide device fixed to the cabinet 2 is shown. FIG.
As can be seen from (a), small reflective rotating impellers 15 are attached to the short sides of the truncated pyramid 12A to which the rectangular waveguide 13A is attached, respectively. The opening angles θ1 and θ2 are different from each other. By setting the different opening angles, the electromagnetic wave reflection by the impeller 15 is diffused in more directions, and as a result, more uniform electromagnetic wave radiation is possible. In this embodiment, the magnetron 1 is of a straight type, but the T-shaped magnetron described above may be used. Even in the case of the truncated cone described above, the same effect as that described in the present embodiment can be expected by making the mounting angles of the plurality of impellers attached to the cone different.

In the embodiment shown in FIGS. 15 (a) and 15 (b), the frusto-conical body 12 can be detachably mounted on the cabinet 2 having various volumes by using the toggle coupler means. A pair of tightening rings 19A and 19B for surrounding and tightening the outer peripheral edge of the opening portion of the cone 12 are rotatably connected by hinges 20, and
B, a knob 21 rotatably attached to the upper end of the clamper 2 and a clamper 2 having one end engaged with a notch 22 provided at the upper end of the fastening ring 19A and the other end pin-connected to the knob 21.
3, the outer peripheral edge of the opening can be firmly tightened. As described above, the frusto-conical body provided with the waveguide device can be easily attached to the cabinet 2, so that one waveguide device can be easily attached to various cabinets each having a storage volume. Thus, the effect that the exchange of the cabinet becomes extremely easy can be exhibited. Obviously, the toggle coupler means is applicable not only to the truncated cone but also to the truncated pyramid.

The embodiment shown in FIG.
1 shows a plasma burner generator 24 that generates a plasma burner using electromagnetic waves radiated from the plasma burner. The electrode 25 to be irradiated with the electromagnetic wave is a metal rod formed by sintering tungsten, copper, and zirconia, and has a tip slightly projecting from a tapered tip of a cavity 26 as a metal container. The tip of the cavity 26 and the electrode 25
A tapered tip of the ceramic tube 27 is interposed between the ceramic tube 27 and the front end of the ceramic tube 27. The ceramic tube 27 is made of a highly heat-resistant ceramic material mainly composed of zirconia and alumina. A plurality of air circulation holes 28 are formed at the rear end of the ceramic cylinder 27, and compressed air supplied from an air nozzle 29 passes through the air circulation hole 28 and is provided between the ceramic cylinder 27 and the electrode 25. It is discharged to the outside of the cavity 26 through a small gap. By piercing the air flow hole 28 in a direction inclined with respect to the axis of the cylinder, the air flow generates a rotational force inside the cylinder, whereby the plasma 30 flame can be made into a thin flame. The electrode 25 and the tip of the ceramic tube 27 can be cooled by the air flow. Since this plasma flame can generate a high temperature of, for example, 5,000 ° C. to 8,000 ° C. even without being released by air, it is possible to process various metal materials, plastic materials, and the like by welding and cutting. Further, the ejection of the plasma flame by air makes it possible to narrow down the plasma flame, thereby making it possible to obtain a plasma burner flame having a still higher temperature. In this embodiment, it is also possible to adopt a T-shaped magnetron type.

FIG. 17 shows a main part of a plasma burner generator 24 as shown in FIG. 16, that is, a plasma cylinder 27 having an electrode 25 and an air flow hole 28 supported by a pair of supports 33 to form an interior of a cabinet 31. 1 shows a plasma burner generator 32 housed in the apparatus. In FIG. 17, an electromagnetic wave generated from the magnetron 1 is a normal waveguide 13B.
However, if the waveguide device (for example, the waveguide device from D1 to D4) according to the above-described various embodiments of the present invention is used instead of the waveguide device, the electrode 25 is connected to the cabinet 32. Regardless of the position in the interior, a uniform plasma flame 30 can be obtained without depending on the position. That is, the direction of the plasma flame can be freely set upward or downward.

[0021]

As described above, according to the present invention, the following remarkable effects can be achieved. (1) Uniform radiation of electromagnetic waves into the cabinet becomes possible. (2) The cross-sectional shape of the waveguide is not limited to a conventional rectangular shape, but can be set to a circular shape, a polygonal shape, or the like. (3) Since the cross-sectional area of the waveguide can be set to be much smaller than that of the conventional one, it is effective for downsizing the electromagnetic wave heating device. (4) Heating and fusion bonding are possible even for a long object so that the object to be heated cannot be accommodated in the cabinet. (5) Even more uniform electromagnetic wave radiation can be achieved by adopting a configuration in which a pair of short sides of the truncated pyramid for supporting and fixing the electromagnetic wave generator to the cabinet have different opening angles from each other. You. (6) By using the toggle coupler, a desired waveguide device can be easily mounted on a desired cabinet. (7) By virtue of the configuration of the single electrode and the ceramic cylinder surrounding the tip, a strong plasma burner flame can be generated from the tip of the electrode.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a waveguide device as one embodiment of the present invention.

FIG. 2 is a perspective view showing details of a waveguide device in the embodiment shown in FIG. 1;

FIG. 3 is a cross-sectional view illustrating a configuration of a waveguide device according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a schematic configuration of a waveguide device as another embodiment of the present invention.

FIG. 5 is a perspective view showing a detailed configuration of the waveguide device in the embodiment of FIG. 4;

FIG. 6 is a perspective view showing a schematic configuration of a waveguide device as another embodiment of the present invention.

FIG. 7 compares the electromagnetic wave uniform radiation characteristics of the waveguide devices shown in FIGS. 1, 3, 4 and 6, respectively, with those of the conventional waveguide device shown in FIGS. 14 (a), (b) and (c). It is a graph shown.

FIG. 8 is a table showing conditions of a waveguide inner diameter necessary for radiating an electromagnetic wave into the inside of the heating vessel for each of the waveguide devices shown in FIGS. 1, 3, 4 and 6, and shown in FIGS. It is a table | surface which shows the conditions of the waveguide inside diameter required for each of each waveguide apparatus to radiate an electromagnetic wave inside a heating container.

9 (a) to 9 (f) are configuration diagrams showing a schematic configuration of each waveguide device listed in the table of FIG. 8;

FIGS. 10A to 10F are configuration diagrams showing a schematic configuration of each waveguide device listed in the table of FIG. 8;

FIGS. 11A to 11F are schematic diagrams showing a schematic configuration of each waveguide device listed in the table of FIG. 8;

FIGS. 12 (a) to (c) are configuration diagrams showing a schematic configuration of each waveguide device listed in the table of FIG. 8;

FIG. 13 is a schematic perspective view showing an embodiment of an apparatus for fusing and joining a synthetic resin pipe using the waveguide device of the present invention.

14 (a) and (b) are schematic cross-sectional views showing an embodiment of a truncated pyramid having a configuration in which the opening angle on the short side of the truncated pyramid is made different, and FIGS. It is the side view seen from the opening side.

FIGS. 15A and 15B show a waveguide device of the present invention,
It is the schematic front view and side view which show the toggle coupler which can be easily attached to the selected desired cabinet.

FIG. 16 is a schematic cross-sectional view showing a configuration of a plasma burner generator of the present invention.

FIG. 17 is a schematic cross-sectional view showing a configuration of a plasma burner generator of the present invention.

18 (a), (b) and (c) are perspective views showing a schematic configuration of a conventional waveguide device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetron 2, 31 Cabinet 2A, 2B Opening 3, 13 Waveguide 4 Turntable 5 Metal reflective rotating blade 6 Coaxial antenna 7 Support plate 8 Housing 9 Ball bearing 10 Driving motor 11 Driving gear 12 Truncated cone 12A Truncated pyramid 13, 13B Waveguide 13A Square waveguide 14A, 14B Small motor 15 Reflector impeller 16A, 16B Pipe 17 Joint 18A, 18B Annular dielectric heat generating material 19A, 19B Fastening ring 20 Hinge 21 Knob 22 Notch Reference Signs List 23 clamper 24, 32 plasma burner generator 25 electrode 26 cavity 27 ceramic cylinder 28 air circulation hole 29 air nozzle 30 plasma flame 33 support S1-S5 small container D1-D4 waveguide device θ mounting inclination angle θ1, θ2 opening of pyramid Square TC Toggle Gulka Error

Claims (31)

[Claims] 1. A waveguide device for transmitting an electromagnetic wave from an electromagnetic wave generation source into a heating vessel, wherein an electromagnetic wave generation device for generating an electromagnetic wave and an end portion for transmitting the electromagnetic wave from the electromagnetic wave generation device are inclined. A waveguide device, comprising: a tubular waveguide cut into a rotatable configuration and rotatable; and a cabinet for accommodating an object to be heated irradiated with electromagnetic waves from the tubular waveguide. 2. The waveguide device according to claim 1, further comprising a frusto-conical body for supporting and fixing the tubular waveguide to the cabinet. 3. The waveguide device according to claim 2, wherein at least one rotating blade for reflecting an electromagnetic wave is attached to the frusto-conical body. 4. A waveguide device for propagating an electromagnetic wave from an electromagnetic wave generation source into a heating vessel, wherein an electromagnetic wave generation device for generating an electromagnetic wave, and a tip portion for transmitting the electromagnetic wave from the electromagnetic wave generation device are inclined. A cylindrical waveguide that is cut and configured to be rotatable, and includes a cabinet for housing an object to be heated that irradiates electromagnetic waves from the cylindrical waveguide,
The waveguide device is characterized in that the electromagnetic wave generator and the waveguide are connected in a straight line. 5. The waveguide device according to claim 4, further comprising a truncated cone for supporting and fixing the cylindrical waveguide to the cabinet. 6. The waveguide device according to claim 4, wherein at least one rotating blade for reflecting electromagnetic waves is attached to the frustoconical body. 7. A waveguide device for propagating an electromagnetic wave from an electromagnetic wave generation source into a heating vessel, wherein an electromagnetic wave generation device for generating an electromagnetic wave and an end portion for transmitting the electromagnetic wave from the electromagnetic wave generation device are inclined. A cylindrical waveguide that is cut and configured to be rotatable, and includes a cabinet for housing an object to be heated that irradiates electromagnetic waves from the cylindrical waveguide,
A waveguide device, wherein a coupling type between the electromagnetic wave generator and the waveguide is a T type. 8. The waveguide device according to claim 7, further comprising a truncated cone for supporting and fixing the tubular waveguide to the cabinet. 9. The waveguide device according to claim 7, wherein at least one rotating blade for reflecting electromagnetic waves is attached to the frusto-conical body. 10. A waveguide device for transmitting an electromagnetic wave from an electromagnetic wave generation source into a heating vessel, comprising: an electromagnetic wave generator for generating an electromagnetic wave; and a cylindrical waveguide for transmitting the electromagnetic wave from the electromagnetic wave generator. And a cabinet for accommodating an object to be heated irradiated with electromagnetic waves from the cylindrical waveguide. 11. The waveguide device according to claim 10, further comprising a truncated cone for supporting and fixing the cylindrical waveguide to the cabinet. 12. The waveguide device according to claim 10, wherein at least one rotating blade for reflecting electromagnetic waves is attached to the frustoconical body. 13. A waveguide device for transmitting an electromagnetic wave from an electromagnetic wave generation source into a heating vessel, comprising: an electromagnetic wave generation device for generating an electromagnetic wave; and a cylindrical waveguide for transmitting the electromagnetic wave from the electromagnetic wave generation device. And a cabinet for accommodating an object to be heated which irradiates electromagnetic waves from the cylindrical waveguide, wherein a coupling type of the electromagnetic wave generator and the waveguide is a straight-forward type. Wave guide device. 14. The waveguide device according to claim 13, further comprising a frusto-conical body for supporting and fixing the tubular waveguide to the cabinet. 15. The waveguide device according to claim 13, wherein at least one rotating blade for reflecting electromagnetic waves is attached to the frusto-conical body. 16. A waveguide device for propagating an electromagnetic wave from an electromagnetic wave generation source into a heating vessel, comprising: an electromagnetic wave generation device for generating an electromagnetic wave; and a mounting angle of the electromagnetic wave generation device with respect to the cabinet. A waveguide device comprising a frusto-conical body for supporting and fixing, wherein a coupling type of the electromagnetic wave generator and the waveguide is a straight-line type. 17. The waveguide device according to claim 16, further comprising an antenna for transmitting an electromagnetic wave into the cabinet. 18. The waveguide device according to claim 16, wherein at least one rotating blade for reflecting an electromagnetic wave is attached to the frusto-conical body. 19. A waveguide device for propagating an electromagnetic wave from a source of electromagnetic waves into a heating vessel, comprising: an electromagnetic wave generating device for generating an electromagnetic wave; and a cutting head for supporting and fixing the electromagnetic wave generating device to the cabinet. A waveguide device comprising a conical body, wherein a coupling type of the electromagnetic wave generator and the waveguide is a straight-line type. 20. The waveguide device according to claim 19, further comprising an antenna for transmitting an electromagnetic wave into the cabinet. 21. A waveguide device for propagating an electromagnetic wave from an electromagnetic wave generation source into a heating vessel, comprising: an electromagnetic wave generator for generating an electromagnetic wave; and a bevel for supporting and fixing the electromagnetic wave generator to the cabinet. A waveguide device comprising a conical body, wherein a coupling type of the electromagnetic wave generator and the waveguide is a T type. 22. The waveguide device according to claim 21, wherein at least one rotating blade for reflecting electromagnetic waves is attached to the frusto-conical body. 23. A rectangular waveguide device for propagating an electromagnetic wave from an electromagnetic wave generation source into a heating vessel, comprising: an electromagnetic wave generator for generating an electromagnetic wave; and a support for fixing the electromagnetic wave generator to the cabinet. A waveguide device comprising a truncated pyramid, wherein a pair of short sides of the truncated pyramid have different opening angles. 24. A heating apparatus for heating an object to be heated by irradiating an object to be heated housed in a cabinet with an electromagnetic wave from an electromagnetic wave generation source, wherein the object to be heated is a pair of bonded objects to be fused. Having a melting point substantially equal to the melting point of the fusion-bonded article, and a joint covering both ends of the fusion-bonded article together, interposed between the joint and the fusion-bonded article; A dielectric heating material that generates heat by the electromagnetic wave. 25. The heating device according to claim 24, wherein a surface of the dielectric heating material is coated with a material having a melting point lower than the melting point of the material to be fused. 26. The heating device according to claim 24, wherein the object to be fused is a tubular body. 27. The heating device according to claim 24, wherein the object to be fused is a plate-like body. 28. The heating apparatus according to claim 24, wherein the dielectric heating material is any one of a ring, a pellet, a tape, and a paste. 29. A single electrode for absorbing an electromagnetic wave and a ceramic cylinder surrounding the tip of the electrode, and the electrode is irradiated with the electromagnetic wave to generate plasma from the electrode and the tip of the ceramic cylinder. A plasma burner generator, wherein a burner flame is emitted. 30. The plasma burner generator according to claim 29, wherein the electrode is a sintered alloy mainly containing tungsten, copper and zirconia. 31. The plasma burner generator according to claim 29, wherein the ceramic cylinder is made of an alloy containing zirconia and alumina as main components.