JPH0138205B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes a gas passage formed between an inner combustion tube and an outer combustion tube, and a central opening of the inner combustion tube and the base end of the vaporization tube to transfer the mixed gas generated in the vaporization tube. Even when the jet combustion is performed vigorously through the gas jet passage formed between the open side circumferential wall, the jet noise of the mixed gas is reduced as much as possible, and the combustion is carried out in a quiet state, while at the same time the amount of combustion is increased. The present invention relates to a vaporizing burner that can successfully generate mixed gas even when the amount of gas is reduced to an extremely lower level than usual, and that can continue low-noise vaporizing combustion for a long period of time.

First, as described in Japanese Patent Publication No. 58-15685, the present applicant has developed an annular combustion chamber formed between an inner combustion tube and an outer combustion tube to collect a part of the mixed gas generated in the vaporization tube. The flame is ejected forward from the gas passage, and the other mixed gas is ejected obliquely forward and outward from the gas ejection passage formed between the central opening of the inner combustion tube and the peripheral wall on the open base end of the carburetor tube. We have developed a vaporizing burner that can do this, and as it has been put into practice, it has shown considerable effectiveness.

By the way, in the case of the above-mentioned vaporizing burner, the mixed gas generated in the vaporizing cylinder is in a considerably high pressure state, and the ejection speed of this high-pressure mixed gas is slowed down by the thin layer gas passage and the gas jetting passage. Since each gas is vigorously ejected into the inner combustion cylinder without being heated, the air-fuel mixture is ejected noisily while vaporization combustion is continuing, making it impossible to continue vaporization combustion in a quiet state. However, the mixed gas ejected from the gas passage and the gas jet passage is inevitably combusted in such a way that it spreads outward, so when the amount of combustion is reduced to an extremely smaller amount than normal, the phenomenon of insufficient heating of the vaporization cylinder may occur. This causes the subsequent generation of vaporized gas to become unsmooth, making it impossible to continue vaporization and combustion in a stable state.

SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks of the known vaporizing burner, the present invention actively slows down the ejection speed of the mixed gas that is vigorously ejected from the gas ejection passage and the gas passage, so that the vaporization burner can be heated in a low-pitched state. The object of the present invention is to provide a vaporizing burner that can stably continue vaporizing combustion of a relatively small capacity by emitting flames toward the outer circumferential surface and easily achieving quiet vaporizing combustion.

In view of the above, in order to achieve the above object, the present invention has a configuration in which, in particular, the mixture gas ejected from the gas ejection passage is formed in a vortex shape at the tip side of the inner combustion cylinder, and the ejection speed is At the same time, the discharge side of the gas passage is widened and the peripheral wall on the tip side is expanded so that the flame can be ejected while decelerating the speed of the mixed gas ejected from the gas passage. This is a vaporizing burner characterized by disposing an annular inclined guide cylinder that is slightly inclined inward, and according to this vaporizing burner, gas is ejected from the gas injection passage inside the inner combustion cylinder. The mixture gas is turned into a vortex, and the jetting speed is slowed down to induce a flame toward the outer circumferential surface of the vaporization cylinder, and the discharge side of the gas passage is widened to create a swirl of the mixture gas spouted from the gas passage. An annular inclined guide cylinder with a peripheral wall on the tip side inclined slightly inward is provided so that the flame can be ejected while reducing the ejection speed, so that the ejection speed of the mixed gas ejected from the gas ejection passage and the gas passage, respectively. Since the flame can be ejected toward the outer circumferential surface of the vaporizing cylinder while actively decelerating the gas, it actively prevents the ejection noise of mixed gas, which is seen in conventional vaporizing burners, and vaporizes in a quiet state. It is possible to continue combustion, and even when the combustion amount is reduced to an extremely small amount compared to normal, the entire vaporizing cylinder is efficiently heated to ensure subsequent vaporized gas generation, making it stable. This has the effect of easily continuing vaporization combustion.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the vaporizing burner according to the present invention will be described below as shown in the accompanying drawings.

In the drawings, reference numeral 1 denotes an outer combustion tube made of a thin material such as an iron plate, and the outer combustion tube is formed into a bottomed cylindrical shape having a relatively short cylindrical wall 1a with an open end. Moreover, the center side of the bottom bulges outward to provide a recessed part 2 of an appropriate depth. Reference numeral 3 denotes an inner combustion tube made of the same material as the outer combustion tube 1, and the inner combustion tube 3 is formed into a bottomed cylinder shape having a relatively short cylinder wall 3a with an open end. Furthermore, the inner combustion tube 3 is disposed within the outer combustion tube 1 so that a thin gas passage 4 is formed between the inner combustion tube 3 and the outer combustion tube 1. The opening 5 opened at approximately the center of the inner combustion tube 3 is
The peripheral wall is tapered and a recess 6 is formed in the center.
form. Reference numeral 7 denotes a rotating shaft inserted through the center of the inner combustion tube 3, and a vaporizing tube 8 whose base end is open is directly connected to the tip of the rotating shaft 7.

A fuel flow gap 9 is provided between the base end open side of the vaporization tube 8 and the open side end of the vaporization tube 8, and the mixed gas 1 is
0 is attached integrally. The above-mentioned mixed gas 10 is formed into a hollow cylindrical shape as a whole, with the front half expanding outward from the boundary wall 11 and the rear half forming a cylinder 13 having the same diameter. The tip of the guide tube 12 serves as a fuel splashing end 14. The majority of the cylindrical body 13 of the gas mixture 10 described above is fitted into the recess 6 to form the opening 5 and the gas mixture 10.
An annular gas ejection passage 1 is provided between the fuel guide cylinder 12 and the fuel guide cylinder 12.
Form 5. Therefore, both the gas passage 4 and the gas ejection passage 15 communicate with the inside of the vaporization cylinder 8. Reference numeral 16 denotes a blower tube inserted into the carburetor tube 8, and the base end side of the blower tube 16 has a ventilation port 17 opened at the center of the concave portion 2 of the outer combustion tube 1.
attached to the surrounding area.

18 is a fuel diffuser 1 attached to the inner surface of the carburetor 8
This is an oil pipe arranged so that the tip opening can be seen on the 9 surface. 20 is a bottomed cylindrical cold air guide tube arranged so that a cold air passage 21 is formed on the outer periphery of the outer combustion tube 1, and the cold air passage 21 is opened at the center of the bottom wall side of the cold air guide tube 20. It is communicated with a ventilation opening 22 via a ventilation gap 23.

Reference numeral 24 denotes an annular inclined guide cylinder disposed inside the inner combustion cylinder 3, and the annular inclined guide cylinder 24 is formed into a hollow annular shape as a whole.
5 has a shape that is slightly inclined inward toward the outer peripheral surface of the vaporizing cylinder 8. Therefore, by disposing the above-mentioned annular inclined guide cylinder 24 in the inner combustion cylinder 3, the discharge side 4a of the gas passage 4 is widened, and the jetting speed of the mixed gas that is vigorously jetted out from the gas passage 4 is increased. The combustion flame is ejected forward in a non-widening manner while decelerating and eliminating ejection noise, and at the same time, the mixture gas ejected forcefully diagonally forward and outward from the gas ejection passage 15 is combusted from the gas passage 4. The induced flame can be directed toward the outer circumferential surface of the vaporizer cylinder 8 while suppressing the flame and generating a vortex phenomenon in this vicinity. 26 is a spark plug.

Next, its effect will be explained.

Now, in FIG. 1, if forced air is blown into the vaporizing cylinder 8 through the air outlet 22 and the air outlet 17, the forced air will be blown out from the gas passage 4 and the gas jetting passage 15. Therefore, when the raw fuel is sent from the oil pipe 18 to the inner surface of the rotating vaporizer 8 through the fuel diffuser 19, the fuel is diffused in a thin film by the centrifugal force of the rotation of the vaporizer cylinder 8 and the jetting action of forced air. The fuel is transferred to the inner peripheral surface of the fuel guide cylinder 12 through the fuel circulation gap 9, and is scattered from the entire circumference of the fuel scattering end 14 to the inner peripheral surface of the cylinder wall 3a of the inner combustion cylinder 3, where it is ignited and burnt live. When the fuel is live-combusted in this way, the entire vaporization cylinder 8 is heated by the combustion heat,
The internal temperature is raised to the atmospheric temperature at which vaporization occurs.

Therefore, from then on, the fuel delivered to the inner circumferential surface of the vaporizing tube 8 and the forced air blown into the vaporizing tube 8 are both heated, and the fuel is diffused and transferred along the inner circumferential surface of the vaporizing tube 8. The vaporized gas is quickly evaporated and vaporized while being exposed to the air, and the vaporized gas is mixed with high-temperature wind.
When passing through the cylindrical body 13 of 0, it is stirred and mixed, becomes a complete mixture of gases, is injected into the thin layer gas passage 4, is injected forward, and is ignited by the raw combustion flame, resulting in vaporization and combustion. At the same time as the flame is ejected forward, the mixed gas ejected diagonally forward and outward from the gas ejection passage 15 is simultaneously ignited and burned, and the entire vaporizing cylinder 8 is intensely heated by the double-ring flame. The mixed gas is efficiently combusted in a blue flame state.

By the way, at the time of starting vaporization combustion as described above, the tip side peripheral wall 25 is attached to the tip side of the inner combustion tube 3.
Since the annular inclined guide cylinder 24 is arranged, which is inclined slightly inward, the discharge part 4a of the gas passage 4 is naturally expanded into an unwidened shape, and the gas is ejected from the gas passage 4. The high-pressure mixed gas is reduced in pressure in the discharge part 4a, and is ejected forward in an unwidened shape while the ejection speed is significantly reduced, and is ejected forcefully diagonally forward and outward from the gas ejection passage 15. The high-pressure mixed gas is suppressed by the previous combustion flame and causes a vortex phenomenon in the vicinity of the peripheral wall 25 on the distal end side of the annular inclined guide cylinder 24, and the jetting speed is significantly reduced while flowing along the peripheral wall 25 on the distal end side of the vaporizing cylinder 8. A flame is ejected towards the outer surface.

Therefore, the gas passage 4 and the gas ejection passage 1
Since the gas mixture ejected from each of the gases 5 has its ejection speed reduced at the same time, it ejects into flames in a low-pitched state.

Therefore, the air-fuel mixture jetting noise that tends to occur in this type of vaporizing burner is quickly eliminated, which not only allows vaporizing combustion to continue at a low noise level, but also allows the vaporizing combustion flame to be actively activated. Since the flame can be ejected toward the outer circumferential surface of the vaporization tube 8, even if the combustion amount is extremely smaller than usual, the vaporization tube 8 will not be insufficiently heated and the mixture gas will be continuously heated. This allows stable vaporization combustion to occur over a long period of time.

[Brief explanation of drawings]

The drawings show an embodiment of the vaporizing burner according to the present invention, in which FIG. 1 is a partially cutaway longitudinal sectional front view, and FIG. 2 is a partially cutaway explanatory diagram of the operation. 1... Outer combustion tube, 3... Inner combustion tube, 4...
Gas passage, 4a... Discharge side of gas passage, 5... Central opening, 8... Vaporization tube, 15... Gas ejection passage, 24... Annular inclined guide cylinder, 25... Front end side circumferential wall.

Claims (1)

[Claims] 1. A part of the mixed gas generated in the carburetor cylinder is blown forward through the annular gas passage formed between the inner combustion cylinder and the outer combustion cylinder, and the other mixture gas is sent to the inner combustion cylinder. The flame is ejected diagonally forward and outward from the gas ejection passage formed between the central opening and the circumferential wall on the base end open side of the vaporizing cylinder, and the gas ejection passage is ejected from the gas ejection passage on the tip side of the inner combustion cylinder. The mixture gas is turned into a vortex, and the jetting speed is slowed down to induce a flame toward the outer circumferential surface of the vaporization cylinder, and the discharge side of the gas passage is widened to eject the mixture gas from the gas passage. A vaporizing burner characterized by having an annular inclined guide cylinder whose distal end side circumferential wall is inclined slightly inward so that flame can be emitted while reducing the speed.