JPH0245088B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vaporizing burner that evaporates and burns kerosene or other liquid fuel from an initial raw combustion state.

In a combustion cylinder with an open tip, a vaporizer with a closed tip and an inner wall for ejecting gas toward the open end of the combustion cylinder is rotatably disposed on the proximal release side. A mixed gas passage and a gas chamber are provided with a wall tube consisting of a ventilation wall, a gas chamber wall, and a gas ejection outer wall, and communicate with each other from the distal end to the proximal end between the vaporized body and the wall tube. Then, kerosene and other liquid fuels are atomized and burnt live by sequentially forming gas jetting passages, and then the atomized liquid fuel is evaporated and vaporized by the heat of combustion, and at the same time, it is mixed with air to generate mixed gas. In the case of a vaporizing burner, in which the gas is generated and combusted vigorously through a narrow annular gas ejection passage, if the blow pressure of the mixed gas is low, it will ignite in the gas chamber and cause backfire combustion, causing the vaporizing burner to burn. cannot be used as Therefore, conventional vaporizing burners of this type generally burn the mixed gas by increasing the jet pressure to an extent that backfire combustion does not occur, making it impossible to burn quietly and softly due to the high vaporization combustion noise. As expected, the amount of mixed gas that is forced into the gas chamber from the mixed gas passage is constantly changing, and it appears in a swirling state due to the rotation of the vaporized body, and after hitting the gas chamber wall, it turns around and becomes narrower. Because fumarole combustion is forced from the gas outlet, a pulsation phenomenon occurs in the gas chamber due to fluctuations in gas pressure, and the blow pressure is not equalized around the entire circumference of the gas outlet.As a result, the vaporized combustion flame The combustion state fluctuates and becomes unstable as it becomes wavy with different lengths.

In view of the above, the present invention divides the inside of the gas ejection path into two in parallel with an inner gas branch path and an outer gas branch path by a gas ejection wall, a part of which is a combustion wall surface.
The discharge side of the gas branch outer path is connected to a thin fume gas chamber formed by an extended gas ejection outer wall extending outward from the circumferential end of the gas ejection outer wall and a combustion surface of the gas ejection wall. , even though the gas mixture has a high fumarole pressure,
While this is made to flow along thin, parallel, and relatively long inner and outer gas branch paths, pulsation of gas pressure in the gas chamber is prevented, and the length is always stable. Perhaps because it is able to maintain combustion as a soft flame, the combustion noise is quiet and backfire combustion is less likely to occur.
The object of the present invention is to provide a vaporizing burner that can easily expand the combustion surface.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a vaporizing burner according to the present invention will be described below with reference to preferred embodiments shown in the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a combustion tube whose tip is open and whose base end is connected to a ventilation passage 2.
A rotary shaft 3 inserted into the combustion cylinder 1 from the ventilation passage 2 side is provided in the center of the rotary shaft 3, and a cylindrical vaporizer 4 with a closed tip and an open base end is provided at the tip of the rotary shaft 3. is fixedly placed over the rotating shaft 3. A gas stirring cylinder 5 is attached to the base end open side of the vaporizer 4 with a fuel scattering gap 6 therebetween, and a gas jetting inner wall 7 formed on the outer peripheral side of the gas stirring cylinder 5 is attached to the tip of the combustion cylinder 1. It is inclined obliquely upward toward the open side, and its end forms a fuel splashing end 8. Reference numeral 9 denotes a wall tube attached to the base end side of the combustion tube 1 so that it does not rotate from the inside of the vaporizer 4 toward the open outer side of the base end, and the wall tube 9 is located inside the vaporizer 4. and a ventilation wall 10 having a ventilation port 11 opened at the top, a gas chamber wall 12 located so as to surround the outside of the base end open side of the vaporizer 4, and a gas jetting outer wall 13 inclined parallel to the gas jetting inner wall 7. A mixed gas passage 14 and a gas chamber 15 are formed between the inner circumferential side of the vaporized body 4 and the outer circumferential side of the wall tube 9 and communicate with each other from the distal end toward the proximal end, and the gas chamber 15 expands toward the distal end. Relatively long gas ejection passages 16 that are open and inclined are sequentially formed. Therefore, the gas ejection outer wall 13 is inclined toward the open end side of the combustion tube 1 in order to form a gas ejection passage 16 that is inclined toward the open end side of the combustion tube 1 between it and the gas ejection inner wall 7. be.

The inside of the gas jetting passage 16 formed as described above is parallel to the gas branching inner passage 19 and the gas branching outer passage 20 by the gas jetting wall 17 which integrally includes the combustion wall surface 18 which is partly horizontal. At the same time, the discharge side of the gas branch outer path 20 is a gas ejection outer wall 2 extending outward from the peripheral end side of the gas ejection outer wall 13 in a substantially horizontal manner.
1 and the combustion wall surface 18 of the gas ejection wall 17.

Reference numeral 23 denotes a large number of flame holes arranged on the surface of the combustion wall surface 18, and the flame holes 23 may be in the shape of a slit 23' as shown in FIG.

Reference numeral 24 denotes a blast passage formed between the gas chamber wall 12 and the base end side of the combustion tube 1, and the base end side of this jet passage is connected to the blast passage 2. Reference numeral 25 denotes an inverted cone-shaped fuel diffuser attached to the inner surface of the top end of the vaporizer 4 via the rotary shaft 3, and the tip of the fuel supply pipe 26 is visible through the fuel diffuser 25.

Reference numeral 27 denotes a hollow inverted conical ventilation guide mounted on the inner surface of the top end of the vaporizer 4 so as to surround the fuel diffuser 25, and a fuel oil outflow gap 28 is formed in the upper part of the ventilation guide 27. to divide the forced air flowing into the mixed gas passage 14 through the ventilation port 11 into two,
A part of the air is made to flow directly to the mixed gas passage 14, and another forced air is made to flow between the ventilation guide body 27 and the fuel diffuser 25, thereby atomizing the fuel flowing along the surface of the fuel diffuser 25. promote. Therefore, the ventilation guide body 27 is of an appropriate size as required. 29 is a spark plug.

The vaporizing burner shown in FIG. 4 is another example of the vaporizing burner shown in FIG.
The proximal open side wall of the combustion tube 1 is integrally curved and expanded toward the open end side of the combustion tube 1, and a curved expanded portion is formed on the gas ejection inner wall 7'.
If the vaporized body 4' is formed in this manner, the gas stirring cylinder 5 shown in FIG. 1 is not required, and the vaporizing burner can be made simpler.

The vaporizing burner shown in FIG.
A large number of sub-flame holes 30 are opened in the gas ejection wall 17 at a position near the discharge side of No. This is a case in which the ejection speed of the mixed gas flowing in the gas branch inner passage 19 is moderated by causing the fumes to flow into the gas branch inner passage 19, thereby further preventing a reduction in combustion noise and generation of unstable combustion flame.

Next, the operation of the present invention will be explained.

In Fig. 1, when starting the burner, the rotary shaft 3 rotates the vaporized body 4 at high speed, forcing forced air to flow from the ventilation passage 2 toward the combustion tube 1, and at the same time, the supply of liquid fuel from the fuel supply pipe 26 begins. Then, after the liquid fuel is supplied from the tip of the fuel supply pipe 26 to the surface of the fuel diffuser 25, its rotational action and the ventilation guide 27
The vaporized material 4 is diffused and transferred by the blowing action of the forced air flowing along the air flow guide member 27, and diffuses into fine particles through the fuel outflow gap 28 provided at the top of the ventilation guide 27.
Thereafter, the fuel passes sequentially through the mixed gas passage 14, passes through the fuel scattering gap 6 provided on the open side of the base end of the vaporized body 4, and flows from the fuel scattering end 8' to the inner circumference of the combustion tube 1. Since it is sprayed over the surface, when it is ignited by the spark plug 29, raw combustion occurs within the combustion tube 1.
When raw combustion occurs in the combustion tube 1, the combustion flame heats the vaporized body 4, and the vaporized body 4 rapidly reaches the vaporization temperature of the fuel. Therefore, the fuel supplied to the inner circumferential surface of the top end of the vaporized body 4 is rapidly evaporated and vaporized while being diffused and transferred along the inner circumferential surface of the vaporized body 4 due to the rotational centrifugal action. However, in the above-mentioned combustion state, a part of the forced air flowing from the ventilation passage 2 toward the combustion tube 1 is passed through the ventilation opening 11 into the mixed gas passage 14, and at the same time, other forced air is The fuel is ejected from the fume path 24 into the combustion cylinder 1.

Therefore, the evaporated vaporized gas generated in the mixed gas passage 14 is evenly stirred and mixed with the forced air, becomes a mixed gas of a constant concentration, and enters the gas chamber 15 from the gas stirring cylinder 5 while exhibiting a swirling state. , then hits the gas chamber wall 12 and turns over, causing the gas ejection path 16
It exits to the gas branch inner passage 19 and the gas branch outer passage 20, which are further divided into two, and is combusted by fumes through the narrow gas branch inner passage 19, while the other mixed gas flows through the gas branch outer passage 2.
0, through the thin layer of fumarole gas chamber 22, and then to the combustion wall surface 1.
Fumarole combustion starts from 8.

Therefore, during vaporization combustion as described above, the mixed gas is supplied into the gas chamber 12 in a pulsating manner while swirling under the condition that the amount of gas generated is always different, so that the gas pressure in the gas chamber 12 increases. Even if a pulsating phenomenon occurs, the mixed gas does not immediately pulsate from a single ejection passage and emit forceful fumes, but instead is separated into a large area gas branch inner passage 19 and a gas branch exterior 20 and stored therein. As a result, the gas pressure pulsations are alleviated and become equal pressure state, and the gas pressure pulsation phenomenon is naturally eliminated. At the same time, a combustion flame of the same length is ejected in a stable state over the entire circumference, and at the same time, this combustion flame reaches the combustion wall surface 1.
Since the flame rises while being diffused along the combustion wall 8 and the flame pressure of the combustion flame is reduced, the sound is low, quiet, and soft, and the combustion flame from the combustion wall surface 18 allows stable combustion over a wide range.

In short, since the present invention has the above-described specific structure, the liquid fuel is atomized and burnt live, and then the atomized liquid fuel is evaporated and vaporized using the heat of combustion, and at the same time, it is mixed with air. Even if the burner is a vaporizing burner that generates air gas and burns the air mixture vigorously through the gas ejection passage 16, the pulsation phenomenon of gas pressure in the gas chamber 12 is naturally eliminated and combustion of a certain length is achieved. Not only can the flame be ejected stably all around the circumference, but the combustion sound can be made quiet and soft, and the combustion can be made over a wide range, resulting in the effect of significantly expanding the range of effectiveness as a vaporizing burner.

[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, Fig. 2 is a partially cutaway plan view of only the combustion wall surface, and Fig. 3 is a partially cutaway plan view of the combustion wall. FIG. 4 is a partially cutaway plan view showing another example of the wall surface, FIG. 4 is a partially cutaway longitudinal sectional front view of another embodiment of the vaporizing burner, and FIG. It is an enlarged longitudinal cross-sectional view. DESCRIPTION OF SYMBOLS 1... Combustion tube, 4... Gaseous body, 7... Gas ejection inner wall, 9... Wall tube, 10... Ventilation wall, 12... Gas chamber wall, 13... Gas ejection outer wall, 14... Air mixture Gas passage, 15... gas chamber, 16... gas ejection part,
17...Gas ejection wall, 18...Combustion wall surface, 19...
...Gas branch inner path, 20...Gas branch outer path, 21...
...Extended gas jetting outer wall, 22... Fumarole gas chamber.

Claims (1)

[Claims] 1. In a combustion cylinder with an open tip, a vaporizer with a closed tip and a gas ejection inner wall sloped in a diffused manner toward the open end of the combustion cylinder is rotatably disposed on the open base side, and A wall tube consisting of a ventilation wall, a gas chamber wall, and a gas ejection wall inclined parallel to the gas ejection inner wall is provided on the inside and open outside of the body, and the base is disposed between the vaporized body and the wall tube from the tip side. In a device in which a mixed gas passageway, a gas chamber, and a relatively long gas jetting path which are in communication with each other toward the end side and are inclined in an expanding shape toward the tip side are sequentially formed, the inside of the gas jetting path includes:
The gas jetting wall, which is partially a combustion wall, bisects the gas branching inner passage and the gas branching outer passage in parallel, and the discharge side of the gas branching outer passage faces outward with the circumferential end of the gas jetting outer wall. A vaporizing burner characterized in that it is connected to a thin-layer fume gas chamber formed by an extended gas ejection outer wall and a combustion wall surface of the gas ejection wall.