JPH0210334B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Field of Application" The present invention is characterized in that, at the start of combustion, scattered fuel is transferred onto the combustion surface of the bottom wall from the combustion air injected from the combustion surface side of the bottom wall and the gas mixture lean passage. The merging air flow with the combustion air injected toward the cylinder wall may cause the fuel to be blown away toward the combustion surface of the cylinder wall ahead of the fuel scattering position, or the vaporized combustion flame ejected from the combustion surface side of the cylinder wall during vaporization combustion may reach the bottom. It reliably prevents the vaporized combustion flame ejected from the wall combustion surface side from being blown forward unnecessarily, and constantly shifts the supplied fuel from the raw combustion state to the vaporized combustion state, creating a stable vaporization combustion flame. This invention relates to a vaporizing burner that can burn for a long period of time.

``Conventional technology'' Conventionally, a large volume of supplied fuel is quickly transferred from a raw combustion state to a vaporized combustion state automatically, and the generated large volume of mixed gas is spread over the entire inner circumference of the combustion tube. In order to achieve more stable fumarole combustion than the bottom combustion surface and the cylinder wall combustion surface, a rotating vaporization cylinder is placed in a bottomed cylindrical combustion cylinder with an open end, with the open base end as the fuel scattering end. A combustion disk consisting of a bottom wall combustion surface and a cylinder wall combustion surface with a large number of gas ejection holes perforated therein is installed on the inner periphery of the combustion tube between the combustion tube and the combustion disk. A vaporizing burner with a gas chamber communicating with the inside of the vaporizing cylinder was developed before this application, for example, in 1973.
This method is publicly known as described in Japanese Patent No. 40415.

``Problems to be Solved by the Invention'' By the way, in the known vaporizing burner as described above, combustion air is pumped into the combustion cylinder through a large number of gas injection holes drilled in the combustion surface of the bottom wall from the start of ignition combustion. At the same time, the steam is being emitted vigorously towards the front,
Since the combustion air is blown toward the bottom combustion surface from the open end of the carburetor, during live combustion, the fuel is blown into the cylinder wall from the fuel scattering end provided at the base open end of the carburetor. When scattered in fine particles toward a surface,
A part of the scattered fuel is moved forward from the fuel scattering position by the combined air flow of the combustion air vigorously jetted from the gas jet hole in the bottom wall combustion surface and the combustion air jetted from the open end of the vaporization cylinder. This can cause a situation in which a predetermined amount of fuel is not supplied to the ignition position, causing a delay in starting the ignition of the fuel, or sometimes even not being able to start the ignition. The fuel blown away flows into the gas chamber through the gas jet holes drilled in the combustion surface of the cylinder wall, and remains in the gas chamber in a liquid state. This causes a phenomenon in which the gas is combusted in a red flame from the gas outlet at the bottom. On top of that, when the raw combustion state is shifted to the vaporization combustion state and the generated air-fuel mixture is ejected from the entire surface of the combustion disk, the vaporization combustion flame ejected from the combustion surface of the cylinder wall toward the vaporization cylinder is at the bottom. It is blown forward by the vaporized combustion flames that are vigorously ejected from the wall combustion surface,
Disturbance occurs in the vaporization combustion flame, and this turbulence has a greater effect on the vaporization combustion flame located closer to the bottom combustion surface, making it impossible to maintain a stable vaporization combustion flame of a constant length for a long period of time. The combustion flame of the rich mixture gas ejected from the open end of the carburetor cylinder heats it up more than necessary, making it impossible to stably generate a mixture gas of the appropriate concentration, and of course producing high combustion noise. There were some problems.

The present invention provides a mixed gas lean passage connected to an air supply path via a plurality of ventilation pipes on the inner periphery of the central bulging step portion of the bottom wall combustion surface, and also provides a mixture gas lean passage on the inner periphery of the cylinder wall combustion surface.
An ignition promotion/fumes stabilizing ring is installed with the tip side bent inward from the fuel scattering position, so that when raw combustion starts, a portion of the fuel splashed toward the combustion surface of the cylinder wall is combusted on the bottom wall. By preventing the inside of the combustion cylinder from being blown away by the combined flow of combustion air injected from the surface and the air-fuel mixture lean passage, accurate ignition start can be achieved quickly. This not only eliminates the generation of red flame caused by fuel flowing into the gas chamber, but also prevents the vaporized combustion flame from ejecting from the combustion surface of the cylinder wall from ejecting from the combustion surface of the bottom wall even during the transition to vaporization combustion. This prevents the vaporization cylinder from being overheated more than necessary by diluting the concentration of the mixed gas that is blown away by the vaporized combustion flame or ejected from the open end of the vaporization cylinder, and keeps the vaporization cylinder constant and stable. The object of the present invention is to provide a vaporizing burner capable of emitting a long vaporizing combustion flame.

"Means for Solving the Problem" Therefore, the technical problem of the present invention is that even if the burner is a vaporizing burner that injects a large amount of generated mixed gas from the bottom wall combustion surface and the cylinder wall combustion surface, Perhaps because the starting ignition of combustion can be achieved accurately, the generation of red flame is completely eliminated, and when transitioning to vaporization combustion, the vaporization combustion flame ejected from the combustion surface of the cylinder wall is stabilized without causing any turbulence. The purpose is to set it on fire.

In order to solve this technical problem, in particular, the structure is such that a vaporizing cylinder is rotatably disposed within a bottomed cylindrical combustion cylinder with an open end and a fuel scattering end at the open base side circumferential end. On the inner periphery of the above-mentioned combustion tube, a combustion disk is installed, which has a bottom wall combustion surface with a large number of gas injection holes, and a cylinder wall combustion surface with a large number of gas injection holes on the tip side of the fuel scattering position. in which a gas chamber communicating with the inside of the carburetor is formed between the combustion tube and the combustion plate, the inner periphery of the central bulging step of the bottom wall combustion surface and the proximal open side end of the carburetor. A mixture gas dilution passage connected to the air supply path via multiple ventilation pipes is provided between the cylinder wall and the inner periphery of the combustion surface of the cylinder wall, the tip side of which is bent inward from the fuel scattering position. This is a vaporizing burner characterized by the provision of an ignition promoting and fume stabilizing ring.

"Operation" The above technical means operates as follows (see FIGS. 1 and 2). That is, if the burner is started now, the carburetor 11 will be rotated at high speed and combustion air will be blown into the carburetor 11. Most of the combustion air blown into the vaporization tube 11 is introduced into the gas chamber 10 from the vaporization tube 11, and then the inside of the combustion tube 1 is directed forward through the gas ejection hole 8 of the bottom wall combustion surface 5 and is forced into the combustion tube 1. At the same time as being well injected, the cylinder wall combustion surface 6
Fumes are emitted toward the vaporization cylinder 11 from the ejection hole 9 .
Further, a part of the combustion air is blown onto the bottom combustion surface 5 from the ventilation pipe and the mixed gas passage 23.

Incidentally, on the inner periphery of the combustion surface 6 of the cylinder wall, which has a large number of gas ejection holes 9 perforated in the tip part than the fuel scattering position A, there is an ignition accelerator which is bent 27 with the tip side facing inward than the fuel scattering position A. Since the jet stabilizing ring 26 is provided, the combustion air that is vigorously jetted forward into the combustion tube 1 from the gas jet holes 8 located outside the bottom combustion surface 5 and the mixture gas dilution passage 23 The combined airflow with the combustion air injected onto the bottom combustion surface 5 collides with the bending part 27 during the jetting process, and the negative pressure part 28 formed on the back side of the bending part 27 creates a negative pressure part. 28 and is retained near the inner periphery of the bent portion 27 while exhibiting a vortex state, the pressure is reduced, and the gas is ejected forward at a slow speed.

Therefore, under this condition, the fuel is transferred to the vaporizing tube 1.
1, and the fuel is sent to the inner circumference of the vaporizer cylinder 11.
If the fuel is scattered toward the combustion surface 6 of the cylinder wall from the fuel scattering end 21 provided at the proximal open side end by the rotational action of
The fuel collides with the inner circumferential surface of the ignition promoting and fume stabilizing ring 26 and is further atomized, and then rides on the swirling combustion air and accumulates in the vicinity of the inner circumference of the bent portion 27 while being swirled. The combustion air injected from the wall combustion surface 5 and the mixture gas lean passage 23 is prevented from being blown toward the cylinder wall combustion surface 6 side, and combustion is performed quickly without any delay in starting the ignition of the ignition plug 29. This occurs because the scattered fuel is not blown away toward the combustion surface 6 side of the cylinder wall, which may cause a raw combustion flame to be generated in the combustion disk 4, so that the scattered fuel flows down and stays in a liquid state in the gas chamber 10. The generation of red flame is prevented and the vaporization cylinder 11 is efficiently heated with the raw combustion flame, and thereafter the vaporization cylinder 11 is heated.
The fuel fed into the tank is quickly evaporated by the heating action of the vaporizing cylinder 11 and the blowing and diffusing action of the combustion air, and the generated vaporized gas is stirred and mixed with the combustion air to create a complete air mixture. The gas is injected into the gas chamber 10 under pressure and emitted from a large number of gas ejection holes 8 and 9, causing a vaporized combustion flame to rise.

However, even when the fuel is automatically transferred from the raw combustion state to the vaporization combustion state as described above, the vaporization combustion flame ejected from the gas injection hole 8 located outside the bottom wall combustion surface 5 cannot be ignited. The bending portion 2
Since the flame is slowly raised while remaining in a vortex state near the inner side of 7, and the blow pressure is significantly reduced, the vaporized combustion flame ejected from the gas injection hole 9 of the cylinder wall combustion surface 6 is ejected from the bottom wall combustion surface 5. It is possible to always eject a stable vaporized combustion flame of a constant length without being blown forward by the vaporized combustion flame. Moreover, a part of the mixed gas generated in the carburetor cylinder 11 becomes diluted by the combustion air blown through the ventilation pipe 25 in the mixed gas dilute passage 23, so even if it is vaporized and burned, 11 is prevented from being overheated more than necessary, and a vaporized gas of a constant concentration is stably generated.

``Embodiment'' The present invention will be described with reference to an embodiment shown in the accompanying drawings.

In FIGS. 1 and 2, 1 is a bottomed cylindrical combustion tube with an open tip and a closed base,
An air supply passage 2 is adjacent to the bottomed side of the combustion cylinder 1, and is communicated with the air passage 2 through a vent 3 opened to a bulge in the bottomed center of the combustion cylinder 1. The entire inner periphery of the combustion tube 1 is provided with a bottom combustion surface 5 which is open on the inside of the central bulging step 7 and has a large number of gas ejection holes 8 perforated on the outer surface of the central bulging step 7. A combustion plate 4 is provided with a cylinder wall combustion surface 6 in which a large number of gas ejection holes 9 are perforated on the circumferential surface in front of the fuel oil scattering position A, and a gas chamber 10 is provided between the combustion cylinder 1 and the combustion plate 4. It is stretched so that it can be formed. 11 is a cylindrical vaporizing cylinder whose distal end is closed and whose proximal end is open;
The vaporizing cylinder 11 is attached to the tip of a rotating shaft 12 inserted into the combustion cylinder 1 from the air supply path 2 side, so as to be placed over the rotating shaft 12. Reference numeral 13 denotes a blower tube, and the blower tube 13 is deeply inserted from the vent 3 of the combustion tube 1 toward the distal end side of the vaporizer tube 11, and there is no space between the vaporizer tube 11 and the blower tube 13. An air mixture passage 14 is formed, and the base end side of the air mixture passage 14 communicates with the gas chamber 10 through an opening at the center of the combustion disk 4.

An inverted conical fuel splashing body 15 is fixed to the tip of the vaporization tube 11 facing the opening at the tip of the blower tube 13, and a fuel supply pipe 16 is attached to the outer surface of the fuel splashing body 15.
The tips of the two are opened close together. At the proximal open end of the vaporization cylinder 11, a hollow cylindrical air mixture gas passage 19 is formed on the proximal side with the horizontal wall 18 as a boundary.
A mixture cylinder 17 formed in a guide cylinder 20 whose tip side is expanded diagonally forward and whose peripheral end is a fuel scattering end 21 is connected to the end of the vaporizer cylinder 11 to form a fuel diffusion gap 〓2
2 is integrally attached so as to form a fuel oil scattering end 21 provided at the peripheral end of the guide tube 20.
is formed in a horizontal plane.

Reference numeral 23 denotes a mixture gas lean passage which is annularly provided at a small interval on the outer circumferential side of the mixture cylinder 17, and the mixture gas lean passage 23 is connected to the outer circumferential surface of the mixture cylinder 17 and the bottom combustion surface 5. It is formed between the outer circumferential surface of the inner extension wall 24 of the central bulging step 7 provided, and the proximal end side of the mixed gas dilute passage 23 is connected to the gas chamber 1.
0, and the discharge side is opened into the combustion cylinder 1. A plurality of ventilation pipes 25 each having one end communicating with the air supply path 2 are disposed in the middle of the mixed gas dilution passage 23 described above.
... with the other end connected in an open manner, and after the mixed gas generated in the vaporization cylinder 11 is pressurized and stored in the gas chamber 10, a part of the mixed gas flows through the mixed gas dilution passage 23. It is mixed with the combustion air blown from the air supply path 2 through the ventilation pipe 25, and becomes a lean mixture gas having an appropriate gas concentration, which is then sent to the combustion tube 1 from the discharge side.
Gas ejection holes 8 in the bottom wall combustion surface 5
By mixing with the vaporizing combustion flame ejected from the vaporizing combustion flame and causing complete combustion, it is possible to prevent burnout of the entire vaporizing cylinder 11 and to reduce combustion noise.

Reference numeral 26 denotes an ignition promoting and jet stabilizing ring disposed in a cylindrical shape over the entire inner circumferential surface on the base end side of the cylinder wall combustion surface 6 in which a large number of gas ejection holes 9 are not perforated. The fume stabilizing ring 26 has a bent part 27 whose tip side is directed inward from the fuel scattering position A.
By forming this bent part 27, a negative pressure part 28 is provided on the back side of the bent part 27, and when raw combustion starts, the fuel is scattered from the fuel scattering end 21 toward the fuel scattering position A on the combustion surface 6 of the cylinder wall. A part of the fuel is not blown forward in the combustion cylinder 1 by the combined airflow with the combustion air injected from the bottom wall combustion surface 5 and the mixture gas lean passage 23, and the negative pressure in the negative pressure section 28 is maintained. Due to the action, the fuel is retained near the inside of the bent portion 27 under a vortex state to quickly and accurately achieve ignition start, and a part of the unburned fuel flows into the gas chamber 10 to generate red flame. Perhaps because of this, during vaporization combustion, the vaporization combustion flame ejected from the gas injection hole 9 of the cylinder wall combustion surface 6 is blown forward by the vaporization combustion flame ejected forcefully from the gas injection hole 8 of the bottom wall combustion surface 5. It is possible to prevent the turbulence of the combustion flame caused by the combustion flame and to always produce a stable vaporization combustion flame of a constant length.

Reference numeral 29 denotes an ignition plug disposed within the combustion disk 4 near the fuel scattering position A.

"Effects of the Invention" In short, since the present invention has the above-described configuration, the fuel on the combustion surface 6 of the cylinder wall is sprayed from the fuel scattering end 21 provided at the peripheral end on the open side of the base end of the vaporization cylinder 11 at the start of live combustion. A part of the fuel scattered toward the scattering position A is blown forward in the combustion tube 1 by the combined air flow of the combustion air injected from the bottom wall combustion surface 5 and the air-fuel mixture lean passage 23, which is also used to promote ignition. The negative pressure generated in the bent portion 27 of the fume stabilizing ring 26 causes a predetermined amount of fuel to spray onto the ignition plug 29 while causing it to stay in a vortex state, thereby allowing the ignition to start quickly and accurately. This allows the fuel to be combusted live, and at the same time prevents the unburned fuel from being blown away toward the combustion surface 6 of the cylinder wall. Not only can the generation of red flame caused by flowing into the gas chamber 4 be eliminated, but also the gas injection holes 8 in the bottom wall combustion surface 5 can be used even after transition to vaporization combustion.
The vaporized combustion flame injected from the bottom wall combustion surface 5 is slowly raised up while reducing the blow pressure by the negative pressure action described above, and the vaporized combustion flame injected from the gas injection hole 9 of the bottom wall combustion surface 6 is released from the bottom wall combustion surface 5. In order to prevent the turbulence caused by being blown forward by the vaporization combustion flame, and to maintain a stable vaporization combustion flame of a constant length for a long period of time, the gas is emitted from the open end of the vaporization cylinder 11. Since the mixed gas is diluted in the mixed gas dilution passage 23 and combusted in the combustion chamber, it is possible to prevent burnout of the carburetor 11 and reduce combustion noise.

[Brief explanation of drawings]

The drawings show one embodiment of the vaporizing burner according to the present invention, in which FIG. 1 is a longitudinal sectional front view with a portion cut away, and FIG. 2 is a plan view thereof. 1... Combustion tube, 4... Combustion plate, 5... Bottom wall combustion surface, 6... Cylinder wall combustion surface, 7... Center bulging step part,
8, 9...Gas outlet, 10...Gas chamber, 11...
. . . carburetor tube, 21 . . . fuel scattering end, 23 . . . air mixture gas lean passage, 25 . . .

Claims (1)

[Claims] 1. A vaporizing cylinder is rotatably arranged in a bottomed cylindrical combustion cylinder with an open end, and the peripheral end on the open base side is a fuel scattering end, and a large number of gas ejection holes are provided on the inner periphery of the combustion cylinder. A combustion disk is installed between the combustion tube and the combustion disk, which has a combustion surface on the bottom wall with holes in it, and a combustion surface on the cylinder wall with many gas injection holes on the tip side of the fuel scattering position. In a device having a gas chamber communicating with the inside of the cylinder, air is supplied between the inner periphery of the central bulging step of the bottom wall combustion surface and the proximal open end of the vaporization cylinder through a plurality of vent pipes. In addition to providing an air-fuel mixture dilute passageway connected to the combustion surface, an ignition promoting and jet stabilizing ring is provided on the inner periphery of the combustion surface of the cylinder wall, the tip of which is bent inward from the fuel scattering position. vaporizing burner.