JPH0373763B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention aims to promote the atomization of the supplied fuel and the evaporation of the fuel, thereby automatically converting the fuel from raw combustion to green flame vaporization combustion at any time. The present invention relates to a vaporizing burner that prevents occurrence of flashback combustion during vaporizing combustion.

Conventional technology Conventionally, secondary combustion air is ejected from a rotating shaft inserted into the combustion cylinder from an air passage provided on the bottom wall side of the combustion cylinder, covering the front surface of the air passage and between the shaft and the bottom wall of the combustion cylinder. The rotating body is directly connected to form a fume duct, and the small diameter side of the rotating body is closed, and the periphery of the large diameter open side is a convex mantle that becomes the fuel scattering end, and the small diameter side of the tip has a convex mantle and a ventilation passage on the small diameter side of the tip. and an inner mantle of approximately the same shape with a ventilation hole that communicates with the mantle are integrally connected so that an air mixture passage is formed between the mantles, so that the air mixture passage is always spaced at an appropriate interval regardless of the large or small diameter of the vaporizing cylinder. The combustion air is stored inside the inner mantle, and the combustion air is stored under a constant pressure state, which may promote the formation of a mixture of the vaporized gas and the combustion air. The vaporizing burner, which can constantly generate stable mixed gas by circulating an air mixture passage through the air mixture, and can maintain good vaporization combustion over a long period of time even in small to large combustion devices, was developed before this application, for example, by Tokko Sho. 59−
It is described in Japanese Patent No. 45882 and is well known. or,
A liquid fuel combustion system configured to speed up the evaporation of fuel and improve the agitation and mixing of the generated vaporized gas and combustion air by making the direction of diffusion of fuel oil and the direction of flow of combustion air countercurrent. The device is also well known, having been described in, for example, Japanese Patent Publication No. 11762/1983 prior to the filing of this application.

Problems to be Solved by the Invention By the way, as in conventionally known vaporizing burners, the direction of diffusion and migration of fuel and the direction of flow of combustion air are made to flow in parallel or in counterflow, and the evaporated vaporized gas and combustion air are mixed. In any of these systems, the evaporated gas generated in the mixture passage is not stagnated in the mixture passage, but is carried over by the combustion air flowing in one direction. Since the evaporated vaporized gas and the combustion air were only mixed by stirring in the process of being injected, the combustion air supplied into the air mixture passage may not be able to further promote stirring and mixing of the evaporated gas and the combustion air. Due to its structure, it is not possible to always supply a constant amount of air, so a homogeneous gas mixture cannot be obtained, and as a result, there is a problem in continuing stable vaporization combustion over a long period of time.

Therefore, in the first aspect of the present invention, the outer mantle and the inner mantle are connected so that they can rotate together, and furthermore, the outer mantle and the inner mantle are rotated directly from the periphery of the inner mantle across the mixed gas passage toward the fuel evaporating part of the outer mantle. Combustion air is blown onto the inner mantle so that the fuel is scattered in fine particles toward the outer mantle through the front or back surface of the fuel supply wall provided at the upper end of the inner mantle. Even when the fuel is diffused and transferred along the inner circumferential surface, the swirling combustion air causes the fuel to swirl and stay along the inner circumferential surface of the fuel evaporator part, suppressing the speed of diffusion and transfer of the fuel as much as possible to generate evaporated gas. Of course, the generated evaporated gas can be made to temporarily stay in the mixed gas passage, and then be stirred and mixed with the combustion air that blows against the fuel evaporator and swirls and scatters around it. This further promotes stirring and mixing of vaporized gas and combustion air to obtain a complete mixture of gases, and also allows a constant amount of swirling combustion air to always be passed across the mixture gas passage to the fuel evaporator. The present invention provides a vaporizing burner that is capable of supplying blue flame to continue stable blue flame vaporizing combustion over a long period of time, and in addition to the object of the first invention, the second invention The above-mentioned problem is solved by providing a vaporizing burner that has the purpose of preventing a part of the green flame vaporizing combustion flame from being sucked into the inner mantle and causing backfire combustion during continuous green flame vaporizing combustion. It is resolved.

Means for Solving the Problem Therefore, the technical problem of the present invention is to spray fuel onto the outer mantle using the fuel supply wall of the inner mantle, which further diffuses and transfers the scattered fuel along the inner circumferential surface of the mantle. Even in the case of a combustion engine, it is easy to accelerate the evaporation of fuel, efficiently stir and mix the evaporated gas and combustion air, provide a constant supply of combustion air, and prevent the occurrence of backfire combustion. It is about achieving.

In order to solve the above-mentioned technical problem, in particular, the invention of item 1 is provided in which a rotating shaft is inserted from the bottom wall side of a combustion cylinder having a gas chamber inside, the upper end is closed, and the periphery of the open base end is a fuel scattering end. In addition, a mantle with a peripheral wall formed in the fuel evaporation part is directly connected to the fuel evaporation part, and a large number of centrifugal blower blades are arranged radially around the inside of the mantle through a mixed gas passage whose discharge side communicates with the gas chamber. The inner mantle is provided with a fuel supply wall at the upper end that diffuses the fuel supplied to the front or back surface and sprays it toward the outer mantle circumferential surface so that it can rotate together with the outer mantle. A vaporizing burner is characterized in that the generated swirling wind is directly injected into a fuel evaporating part across a mixed gas passage, and the invention of item 2 is also provided in a combustion tube having a gas chamber inside. A flashback prevention cylinder is erected in the center of the bottom wall, and the upper end is closed on the rotating shaft inserted into the combustion cylinder through the flashback prevention cylinder, and the area around the open base side becomes the fuel scattering end, and the surrounding wall is used to prevent fuel evaporation. A mantle formed in the section is directly connected so as to cover the flashback prevention cylinder, and between the mantle and the flashback prevention cylinder there is a mixed gas passage whose discharge side communicates with the gas chamber. The headwind blades are provided radially, and an inner mantle is provided with a fuel supply wall at the upper end that diffuses the fuel supplied to the front or back surface and sprays it toward the inner peripheral surface of the mantle, so that it can rotate together with the outer mantle. At the same time, a rotation gap is provided between the bottom wall side of the inner mantle, the bottom wall side of the combustion cylinder, and the flashback prevention cylinder, so that the swirling wind generated by the centrifugal blower blades can be passed across the mixed gas passage. This is a vaporizing burner characterized by direct injection of fuel into the evaporating section.

Action The above technical means works as follows (see Figure 1). First, when starting combustion, the outer mantle 6 and the inner mantle 10 are rotated integrally in the same direction by the rotary shaft 5. Then, as the inner mantle 10 rotates, a large number of centrifugal blower blades 12 are also rotated in synchrony with the inner mantle 10, and the swirling combustion air thus generated is passed across the mixed gas passage 16 and sent to the fuel evaporation section 9 of the outer mantle 6. The mixed gas is directly injected onto the entire surface, swirled and scattered around the surrounding area, and sent to the gas chamber 19 via the mixed gas passage 16 by a pressure-feeding action, and then injected into the combustion cylinder 1.

Under this condition, if fuel is supplied to the front or back surface of the fuel supply wall 11 of the inner mantle 10 that rotates together with the outer mantle 6, the fuel will be transferred to the peripheral edge of the fuel supply wall 11 or Centrifugal blower blade 12
After being sprayed in fine particles from the upper edge of the mantle 6 towards the inner peripheral surface of the fuel evaporating section 9, it is then diffused and transferred along the inner peripheral surface of the fuel evaporating section 9. Therefore, the supplied fuel can be sprayed using the fuel supply wall 11 of the inner jacket 10, so that the fuel sprayed on the inner circumferential surface of the jacket 6 is evenly atomized. Incidentally, in the fuel evaporating section 9, swirling combustion air generated by the centrifugal blower blades 12 flows through the mixed gas passage 16.
Since the fuel is being sprayed forcefully across the fuel evaporator 9, the fuel that was about to be transferred toward the open side along the inner circumferential surface of the fuel evaporator 9 is blown into the fuel evaporator 9 by the blowing action of the swirling combustion air. The fuel is swirled and retained along the circumferential surface, and at the same time its transfer speed is reduced, it is further atomized, becomes a complete thin film, and gradually diffuses and transfers, becoming fine particles from the fuel scattering end 8 and flowing into the combustion tube 1. It is sprayed on the circumferential surface, and when ignited, raw combustion occurs quickly, heating the entire mantle 6 from the surroundings.

When the mantle 6 is heated in this way and the inside of the mixed gas passage 16 reaches a temperature at which the fuel is evaporated,
Thereafter, the diffused fuel that has traveled along the front or back surface of the fuel supply wall 11 and reached the fuel evaporator 9 is swirled and retained along the fuel evaporator 9 by the swirling combustion air that directly hits the fuel, and its migration is suppressed as much as possible and the fuel is temporarily Then, it is diffused and transferred while causing a slow stagnation phenomenon. the result,
The fuel is heated by the mantle 6 for a long time in a thin film state, so it quickly evaporates and vaporizes.
While the generated vaporized gas is stagnant in the mixed gas passage 16, it is rapidly agitated by the swirling combustion air while being sprayed against the fuel evaporator 9 and diffused to the surroundings, and the vaporized gas and combustion are mixed. After being completely mixed with the commercial air to form a mixed gas, it is fed under pressure to the gas chamber 19 through the mixed gas passage 16, causing a blue flame and vaporized combustion flame to rise. During the continuation of the above-mentioned blue flame vaporization combustion, the swirling combustion air that blows into the mixed gas passage 16 has no blowing loss, so a constant amount is always supplied, and the homogeneous mixed gas is Room 1
The lower part of the rotating centrifugal blower blade 12 is equipped with a flashback prevention tube installed vertically in the combustion tube 1, which allows the blue flame vaporization combustion to continue stably for a long period of time. 2 makes the rotation gap 18
Since the negative pressure of the centrifugal blower blades 12 is mostly applied to the inside of the flashback prevention tube 2 and not to the rotation gap 18 side, the centrifugal blower blades 12 are covered with A part of the combustion air is circulated and ejected from the inside to the outside in the rotation gap 18 by the lower part of the gas chamber 19 , and while the blue flame vaporization combustion continues, a part of the vaporization combustion flame flows into the gas chamber 19 due to negative pressure. It is possible to prevent backfire combustion that occurs due to being sucked into the interior.

Embodiments The structure of the vaporizing burner according to the present invention will be described with reference to preferred embodiments shown in the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 is a bottomed cylindrical combustion tube with an open upper end, and a hollow backfire whose diameter gradually decreases toward the tip is located at the center of the bottom wall of the combustion tube 1. A prevention tube 2 is installed upright, and an intake chamber 3 in which an electric motor 4 is housed is provided on the bottom wall side of the combustion tube 1.
are arranged next to each other, and the combustion tube 1 and the intake chamber 3 are connected through a flashback prevention tube 2. Reference numeral 5 denotes a rotating shaft inserted into the combustion cylinder 1 from the intake chamber 3 side through the center of the flashback prevention cylinder 2, and at the tip of the rotating shaft 5,
The upper end side is closed with a closing wall 7, and the periphery of the base end open side is expanded into a bent shape toward the open side of the combustion tube 1, and the peripheral edge thereof is used as a fuel scattering end 8, and the peripheral wall is formed as a fuel evaporation part 9. The mantle 6 formed in the above-mentioned form is directly connected to the mantle 6, and a mantle is formed on the inside of the mantle 6, that is, between the mantle 6 and the flashback prevention cylinder 2, while the fuel oil supplied to the front side or the back side is diffused in a thin film form on the upper part. It is equipped with a fuel supply wall 11 that sprays fuel in fine particles toward the inner peripheral surface of the fuel evaporator 9 of No. 6, and a large number of centrifugal blower blades 12 are provided radially around the body, and at the bottom, horizontally directed outwards. A hollow inner mantle 10 having a mixed gas guide wall 13 extending outward is connected to the outer mantle 6 via a suitable connecting member so that it can rotate together with the mantle 6. At the center of the fuel supply wall 11 of the inner mantle 10, there is provided a fuel diffusion supply section 14 which is shaped like a hollow inverted cone and is recessed so that the wall plate of the fuel supply wall 11 faces inward. At the same time, the bottom of the fuel oil diffusion supply section 14 is opened, and the fuel supply pipe 15 is connected to the lower inner surface of the fuel diffusion supply section 14.
The opening at the tip is exposed.

A narrow fuel flow passage 17 is provided between the fuel supply wall 11 of the inner mantle 10 and the closing wall 7 of the outer mantle 6.
Between the fuel evaporating part 9 of the mantle 6 and the centrifugal blower blade 12, there is a mixed gas whose base end is connected to the fuel flow passage 17 and whose discharge side is connected to the gas chamber 19 disposed inside the combustion tube 1. The passage 16 is further connected to the induced gas guiding wall 13 of the inner sheath 10 and the lower end of the centrifugal blower blade 12;
A bent narrow rotation gap 18 is provided between the bottom wall of the combustion tube 1 and the flashback prevention tube 2, respectively. The gas chamber 19 described above has a gas wall tube 20 erected from the bottom wall side of the combustion tube 1 so as to wrap around the open base end side of the mantle 6, and the gas wall tube 20 is erected so as to wrap around the open base end side of the mantle 6.
An annular gas ejection passage 21 is formed between the base end open side periphery and the gas wall cylinder 20 . 22 is an ignition plug disposed inside the combustion tube 1.

Although the above vaporizing burner is a basic embodiment of the vaporizing burner according to the present invention,
Among the above embodiments, the apparatus for supplying fuel to the surface of the fuel supply wall 11 of the mantle 6 may be constructed from various modified embodiments as described below.

That is, in the refueling system of the second embodiment shown in FIG. 3, as shown in FIG. Rather than being molded, a separate hollow cone-shaped fuel diffuser 23 is provided with a horizontal scattering wall 24 integrally molded at the large-diameter end, and the fuel diffuser 23 is connected to the inner mantle 10 by the scattering wall 24. fuel supply wall 11
The fuel flow passage 1 is formed between the fuel supply wall 11 around the opening provided in the center of the mantle 6 and the closing wall 7 of the mantle 6.
7, the fuel diffusion supply body 23
After the fuel supplied from the fuel supply pipe 15 is diffused and transferred by the integrally rotating fuel diffusion supply body 23, the distal end opening of the fuel supply pipe 15 is exposed to the small diameter side surface of the fuel supply pipe 15. From fuel supply wall 11
According to the refueling device of this embodiment, the number of times the fuel is spouted is twice compared to the one in FIG. 1, which further promotes the dispersion and atomization of the fuel. can be done. The fuel supply device of the third embodiment shown in FIG.
An upward standing wall 25 is provided at the peripheral end of the fuel supply wall 1 near the standing wall 25.
With the tip opening of the oil supply pipe 15 facing 1,
Fuel is directly supplied from the fuel supply pipe 15 to the surface of the fuel supply wall 11, and according to this fuel supply device, fuel can be supplied to the fuel supply wall 11 with a simple configuration.
It is possible to supply oil to the surface and spray the fuel into fine particles while diffusing the fuel toward the inner circumferential surface of the fuel evaporator 9 of the mantle 6.

Further, it is possible to provide a fuel supply device that supplies fuel to the surface of the fuel supply wall 11 of the inner jacket 10 using the rotary shaft 5 having the fuel supply passage 27 therein. As in the fourth embodiment shown in FIG. 5, this refueling device has a fuel supply wall 11 of an inner jacket 10 directly connected to the distal end side of a rotating shaft 5 having a refueling passage 27 therein by a mounting member 28. A refueling fitting 29 is attached to the rotating shaft 5 whose tip side protrudes from the fuel supply wall 11.
The lower surface of the refueling fitting 29 in contact with the fuel supply wall 11 is provided with a radial spray passage 30 communicating with the refueling passage 27, so that the fuel supplied from the refueling passage 27 is can be sprayed and supplied from the spray passage 30 to the surface of the fuel supply wall 11.

Each fuel supply device illustrated in FIGS. 6 to 10 supplies fuel to the back side of the fuel supply wall 11 of the inner mantle 10 and diffuses and transfers the fuel on the back surface of the fuel supply wall 11. The fuel evaporation section 9 of the mantle 6
Among the modified embodiments in which fuel is sprayed in the form of fine particles on the inner circumferential surface, the fuel supply device of the fifth embodiment shown in FIG.
1 are in close contact with each other and the large diameter end of the inverted conical fuel diffusion supply body 31 is in close contact with the inner surface of the fuel supply wall 11 by inserting the tip side of the rotating shaft 5 to connect the three together. At the same time, the small-diameter surface of the fuel diffusion supply body 31 is configured to face the tip opening of the fuel supply pipe 15, and the fuel supplied from the fuel supply pipe 15 diffuses and transfers on the surface of the fuel diffusion supply body 31 before being supplied with fuel. It reaches the back surface of the wall 11, further diffuses and migrates along the back surface of the fuel supply wall 11, and is finally sprayed and supplied in the form of fine particles toward the inner peripheral surface of the fuel evaporation section 9 of the mantle 6 by the centrifugal blower blades 12. be.

The supply device of the sixth embodiment shown in FIG. The distal end of the rotary shaft 5 is inserted so that the large-diameter end of the inverted conical fuel diffuser 32 in the inner cavity closed with the lid plate 33 is brought into close contact with the inner cavity, thereby connecting the three parts together. A fuel supply pipe 1 is installed on the small diameter side surface of the fuel oil diffuser 32.
The fuel supplied from the fuel supply pipe 15 diffuses and transfers on the surface of the fuel diffusion supply body 32, and then reaches the back surface of the fuel diffusion supply wall 11, and then flows along the back surface of the fuel supply wall 11. Finally, as in the fifth embodiment, the centrifugal blower blade 12
The fuel is sprayed and supplied in the form of fine particles toward the inner peripheral surface of the fuel evaporating section 9.

The refueling device according to the seventh embodiment shown in FIG. The fuel supply pipe 15 is integrally connected to the fuel supply pipe 15 so that the fuel supply pipe 15 is connected to the fuel supply pipe 15 in a manner that
After the supplied fuel is diffused and transferred along the inner surface of the fuel diffusion supply body 32, it is sprayed to the back surface of the fuel supply wall 11 from the fuel injection path 34, further diffused and transferred along the fuel supply wall 11, and finally Then, the centrifugal blower blades 12 spray and supply the fuel to the inner peripheral surface of the fuel evaporator 9 in the form of fine particles.

The fuel supply device of the eighth embodiment shown in FIG. 9 is provided with a hollow inverted conical fuel diffusion supply body 35 integrally formed with a horizontal projecting wall 36 at the large diameter side end, and the fuel diffusion supply body 35 is provided with a The body 35 is connected to a fuel supply wall 1 having an open center.
1, the fuel supply wall 11 and the overhanging wall 36 are integrally connected to each other via a mounting member 38 so that a narrow fuel jetting passage 37 is formed between the fuel supply wall 11 and the overhanging wall 36. The mantle 10 is attached to the mantle 6 so that it can rotate integrally with the mantle 6, and the fuel diffusion supply body 3 is attached.
The tip opening of the fuel supply pipe 15 faces the inside of the small diameter side of the fuel supply pipe 15, and after the fuel supplied from the fuel supply pipe 15 is diffused and transferred along the inner surface of the fuel diffusion supply body 35, the fuel injection passage 37 The fuel is then sprayed onto the back surface of the fuel supply wall 11, further diffused and transferred along the fuel supply wall 11, and finally sprayed and supplied in fine particles to the inner peripheral surface of the fuel evaporation section 9 by the centrifugal blower blades 12. It is.

The oil supply device of the ninth embodiment shown in FIG.
The rotating shaft 5, which has a fuel supply passage 27 inside, is used to supply fuel along the back surface of the fuel supply wall 11 of the inner mantle 10, and this refueling device has a fuel supply passage 39 inside. The closing wall 7 of the outer mantle 6 and the fuel supply wall 11 of the inner mantle 10 are directly connected to the distal end side of the rotary shaft 5 via the mounting member 40 so that a fuel flow passage 17 is formed between the walls 7 and 11. At the same time, there is a fuel supply wall 1 on the back side of the fuel supply wall 11.
1, a refueling fitting 41 that is in close contact with the back surface of the fuel supply wall 11 is mounted on the rotating shaft 5, and a radial spray passage 42 that communicates with the oil supply passage 39 is provided on the upper surface of the refueling fitting 41 that is in contact with the back surface of the fuel supply wall 11. According to this fuel supply device, the fuel supplied from the fuel supply passage 39 is evenly sprayed from the spray passage 42 to the back surface of the fuel supply wall 11, and then the fuel is sent to the mantle 6 by the centrifugal blower blades 12. The fuel can be sprayed in fine particles toward the inner circumferential surface of the fuel evaporator 9.

The gas chamber 19 described in the above-described basic embodiment of the present invention may also have a configuration as described below.

That is, as in the second embodiment shown in FIG.
The periphery of the open side of the proximal end of the mantle 6 is horizontally expanded and extended outward, and this forms a peripheral end portion into a fuel scattering end portion 8, and the inside of the combustion tube 1 outside the fuel scattering end portion 8 is filled with fuel. A gas chamber 19 is formed between the combustion plate 43, which has a plurality of gas injection holes 45 perforated on its upper surface, and the bottom wall at intervals such that an annular gas injection passage 44 is formed between the combustion plate 43 and the scattering end 8. The gas chamber 19 is connected to the discharge side of the mixed gas passage 16, and the mixed gas stirred and mixed in the mixed gas passage 16 is transferred from the vaporizing burner of the embodiment shown in FIG. Gas chamber 19 with a large eruption area
This allows for more fumarole combustion and a greater heating effect.

The gas chamber 19 shown in FIG. 12 is used for a vaporizing burner in which the outer mantle 6 and inner mantle 10 are formed into a flatter conical shape to make the height of the burner lower than that of the vaporizing burner shown in FIG. The gas chamber 19 of the third embodiment is located at an appropriate height inside the combustion tube 1 outside the fuel scattering end 8 provided around the proximal open side of the mantle 6. , an annular gas ejection passage 44 between the fuel oil scattering end 8
Annular horizontal partition walls 4 are arranged at intervals such that
6 is provided to form a gas chamber 19 between the bottom wall, the periphery of the proximal open side of the mantle 6, and the horizontal partition wall 46, and an appropriate number of gas chambers are provided between the horizontal partition wall 46 and the bottom wall of the combustion cylinder 1 The annular wall 47 is connected to the gas ejection passage 4
According to this gas chamber 19, even when the outer mantle 6 and the inner mantle 10 are formed low, the generated mixed gas can be spread over a wide range. It is possible to perform fumarole combustion evenly over the entire range.

What is shown in FIG. 13 is the gas chamber 1 described above.
9, the gas chamber 19 is the gas chamber of the fourth embodiment in which the storage capacity is increased and the air-fuel mixture can be combusted by blowing upward. A combustion plate having a large number of gas ejection holes 50 perforated on the entire inner surface of the bottom wall of the combustion cylinder 1 located at a distance such that an annular gas ejection passage 44 is formed between the combustion cylinder 1 and the periphery of the open base end. The gas chamber 19 is formed between the bottom wall and the combustion disk 49 by extending the combustion chamber 49 horizontally with a space between the combustion disk 49 and the bottom wall.

The fifth embodiment shown in FIG. 14 has a gas chamber 19 capable of blowing and burning the generated mixed gas from the inner circumference of the combustion tube 1 toward the jacket 6. , a combustion disk 51 is stretched across the bottom wall side and the entire inside side wall of the combustion tube 1 located outside the periphery of the proximal open side of the mantle 6, with a gap between the bottom wall and the side wall. The gas chamber 19 has a structure in which an annular gas ejection passage 44 of an appropriate width is provided between the periphery of the proximal open side of the mantle 6 and the end of the combustion disk 51, and a combustion disk 51 located on the side wall.
A large number of gas ejection holes 52 are perforated in the casing, and the mixed gas is directed around the mantle 6 to be combusted, heating the mantle 6 more quickly, and at the same time storing a larger amount of the mixed gas for efficient use. It can be used as a heating source.

Furthermore, as in the sixth embodiment shown in FIG. 15, the combustion disk 51 in the fifth embodiment has a configuration in which a large number of gas ejection holes 52 are bored not only on the side wall side but also on the bottom wall side. If the gas chamber 19 is used, the mixture gas is combusted in a jet from the side toward the mantle 6, and at the same time, the mixture gas is combusted in a jet from the bottom side upward, thereby efficiently achieving a large amount of vaporization combustion. It is possible to increase the heating effect of the mantle 6, generate a large amount of mixed gas in a short time,
It can be provided as a more effective heating source.

Therefore, in the vaporizing burner of the present invention, it is possible to provide a vaporizing burner that meets demand by appropriately using the oil supply device and gas chamber 19 of each of the embodiments described above.

Note that the flashback prevention tube 2 can be manufactured integrally with the combustion tube 1 or separately and installed upright within the combustion tube 1.

Effects of the Invention In short, since the present invention has the above-described specific structure, fuel can be supplied easily and evenly in fine particles by using the front or back surface of the fuel supply wall 11 of the inner mantle 10. The fuel is sprayed onto the inner circumferential surface of the fuel evaporator 9 of the fuel oil evaporator 6 and diffused into a thin film, which is then generated by the centrifugal blower blades 12 provided around the inner mantle 10 that rotates integrally with the outer mantle 6. By directly blowing the swirling air, the fuel is swirled and retained along the inner circumferential surface of the fuel evaporation section 9, and gradually diffused and transferred, slowing down the diffusion and transfer, and of course further promoting the generation of evaporated vaporized gas. After the generated evaporated gas is temporarily swirled and retained in the mixed gas passage 16, it is agitated and mixed with the combustion air that blows directly against the fuel evaporator 9 and swirls and scatters around it, and is vaporized. The agitation and mixing of the gas and combustion air is further promoted to create a complete gas mixture, which can then be vaporized and burned from the gas chamber 19. Since the air is blown by the centrifugal blower blades 12 directly installed on the inner mantle 10 that rotates in synchrony, there is no air loss as in conventional vaporizing burners, and a constant amount of swirl combustion is always made in accordance with the rotational speed of the outer mantle 6. Air mixture gas passage 1
6 and directly to the fuel evaporation section 9 to continue stable blue flame vaporization combustion over a long period of time. This has the effect of being able to prevent the occurrence of backfire combustion due to the suction of the parts into the inner mantle 10.

[Brief explanation of drawings]

The drawings show a vaporizing burner according to the present invention, in which Fig. 1 is a partially cutaway longitudinal sectional front view of the basic vaporizing burner of the present invention, Fig. 2 is a perspective view of the inner mantle, and Fig. 3 is a refueling FIG. 4 is a partially cutaway vertical front view showing a second embodiment of the oil supply device; FIG. 4 is a partially cutaway front view showing a third embodiment of the oil supply device; and FIG. 5 is a fourth embodiment of the oil supply device. Partially cut away vertical front view, No. 6
FIG. 7 is a partially cutaway vertical front view showing a sixth embodiment of the refueling device; FIG. 8 is a seventh embodiment of the refueling device. FIG. 9 is a partially cutaway longitudinal front view showing an eighth embodiment of the oil supply device; FIG. 10 is a partially cutaway longitudinal front view showing the ninth embodiment of the fuel supply device. 11 is a partially cutaway longitudinal sectional front view showing the second embodiment of the gas chamber; FIG. 12 is a front view; FIG.
13 is a partially cutaway longitudinal front view showing the fourth embodiment of the gas chamber, and FIG. 14 is a partially cutaway longitudinal front view showing the third embodiment of the gas chamber.
FIG. 15 is a partially cutaway vertical front view showing the sixth embodiment of the gas chamber. DESCRIPTION OF SYMBOLS 1... Combustion tube, 2... Backfire prevention tube, 5... Rotating shaft, 6... Outer mantle, 7... Closing wall, 8... Fuel scattering end, 9... Fuel evaporation part, 10... Inner mantle , 11...
Fuel supply wall, 12... centrifugal blower blade piece, 16... mixed gas passage, 18... rotation gap, 19... gas chamber.

Claims (1)

[Scope of Claims] 1. The upper end is closed to a rotating shaft inserted from the bottom wall side of a combustion cylinder having a gas chamber inside, and the periphery of the base end open side becomes a fuel scattering end, and the peripheral wall is formed as a fuel evaporation part. The mantle is directly connected to the mantle, and inside the mantle, a large number of centrifugal blower blades are provided radially around the circumference through a mixed gas passage whose discharge side communicates with the gas chamber, and at the upper end, on the front or back surface. An inner mantle equipped with a fuel supply wall that diffuses and sprays the supplied fuel toward the inner circumferential surface of the mantle is housed so that it can rotate together with the outer mantle, and the swirling wind generated by the centrifugal blower blades is converted into air-fuel mixture. A vaporizing burner characterized by direct injection of fuel across a gas passage to a fuel evaporating section. 2. A flashback prevention tube is erected in the center of the bottom wall of a combustion tube with a gas chamber inside, and the upper end is closed and the periphery of the open base end is attached to a rotating shaft inserted into the combustion tube through the flashback prevention tube. A mantle that serves as a fuel scattering end and has a peripheral wall formed as a fuel evaporation part is directly connected so as to cover the flashback prevention tube, and between the mantle and the flashback prevention tube, an air-fuel mixture whose discharge side communicates with the gas chamber is provided. A large number of centrifugal headwind blades are provided radially around the circumference via gas passages, and a fuel supply wall is provided at the upper end to diffuse the fuel supplied to the front or back surface and spray it toward the inner peripheral surface of the mantle. The inner mantle is housed so that it can rotate integrally with the outer mantle, and a rotation gap is provided between the bottom wall side of the inner mantle, the bottom wall side of the combustion cylinder, and the flashback prevention cylinder, and the inner mantle is formed by centrifugal blower blades. A vaporizing burner characterized in that a swirling wind is blown directly onto a fuel evaporating part across a mixed gas passage.