JP4077362B2 - Gun type burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gun-type burner used as a burner for a domestic hot water supply device or the like.
[0002]
[Prior art]
Conventionally, in this type, a secondary air passage is formed inside the burner outer cylinder with the burner outer cylinder, and a nozzle body for fuel injection and a primary stabilizer for rotating the primary air are provided. And a burner inner cylinder provided with a plurality of air holes in the peripheral wall, and further, the burner inner cylinder is formed in two stages by a small diameter and a large diameter combustion cylinder, the small diameter combustion cylinder and the large diameter combustion cylinder A secondary stabilizer is provided at the connecting portion between the two and the fuel, and the combustion air is diffused greatly by two internal and external stabilizers to obtain good combustion. (For example, refer to Patent Document 1.)
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-99404
[Problems to be solved by the invention]
By the way, in this conventional type, the swirl flow from the two internal and external stabilizers immediately contacts within the large-diameter combustion cylinder, resulting in one large swirl flow, and fine diffusion and mixing actions are performed. However, there is a problem in that a poorly burned portion is partially generated and good combustion cannot be obtained as a whole.
[0005]
[Means for Solving the Problems]
The present invention for solving the above drawbacks by focusing on this point, in particular its configuration, by forming an air passage between the burner outer cylinder on the inner side of the burner outer cylinder, the nozzle body for the fuel injection and the secondary A flow straightening cylinder provided with a primary stabilizer for swirling air, a burner inner cylinder provided with a plurality of air holes in the peripheral wall, and further provided with a blower for supplying combustion air behind the burner outer cylinder, The burner inner cylinder is formed in two stages, a small-diameter combustion cylinder connected to the flow straightening cylinder so as to surround the primary stabilizer, and a large-diameter combustion cylinder connected to the tip of the small-diameter combustion cylinder, and further the tip of the small-diameter combustion cylinder A secondary stabilizer is provided on the outer periphery of the connecting portion between the small-diameter combustion cylinder and a large-diameter combustion cylinder, and laminar tertiary air is ejected between the secondary stabilizer and the small-diameter combustion cylinder at the outer diameter of the small-diameter combustion cylinder. the laminar flow ejection portion formed to further the tip of the large径燃sintered tube Between the over Na barrel tip, is obtained by forming a tertiary air jet port comprising a plurality of gaps for jetting the tertiary air remains laminar flow of the outside diameter of the large径燃sintered tube.
[0006]
According to this, a laminar flow from the laminar flow jetting part is formed between the swirling flow by the primary stabilizer and the swirling flow by the secondary stabilizer, and one of the two swirling flows is in the large-diameter combustion cylinder. After the good diffusion and mixing in each swirl flow, good tertiary combustion is performed outside the burner. At this time, the laminar tertiary air from the tertiary air outlet flows around the outer periphery. The outward spread of the flame is suppressed, and better combustion can be obtained.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, a gun type burner attached downward according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes a burner outer cylinder having a bottomed cylindrical shape that is squeezed in two stages toward the front end, and a wind tunnel 3 for injecting combustion air from a blower 2 mounted sideways is fixed to the rear end.
[0008]
Reference numeral 4 denotes a rectifying cylinder provided inside the burner outer cylinder 1 by forming an air passage 5 between the burner outer cylinder 1 and a fuel injection connected to an electromagnetic pump 6 and an oil proportional valve 7 on the inside. Nozzle body 8 for ignition, ignition electrode 9 for igniting the fuel to be injected, and bowl-shaped focusing body 11 for focusing primary air flowing in front of the nozzle body 8 and discharging it from the central hole 10 Further, an opening 12 having a diameter larger than that of the central hole 10 is provided in front of the converging body 11, and the inflow from a plurality of secondary air holes 13 formed in the peripheral wall by overlapping the central hole 10 portion. A primary stabilizer 15 is provided for supplying secondary air that is swirled by a swirl vane 14 formed by cutting and raising around the opening 12.
[0009]
Further, in the periphery of the central hole 10 where the focusing body 11 and the primary stabilizer 15 come into contact, the secondary air from the two gaps collides with the primary air from the central hole 10 perpendicularly from the entire circumference, thereby disturbing the primary air. In order to prevent poor mixing with the injected fuel and prevent good combustion from being obtained, a stepped portion 16 that is in close contact with the primary stabilizer 15 is formed around the central hole 10 to further reliably provide the secondary. A standing wall 17 that rises forward is provided at the end of the central hole 10 so as to prevent interference of the air with the primary air discharged from the central hole 10.
[0010]
18 is a burner inner cylinder that is provided inside the burner outer cylinder 1 while holding the air passage 5 as in the case of the flow straightening cylinder 4, and includes a small-diameter combustion cylinder 19 and a large-diameter combustion cylinder 20 that are connected to the tip of the primary stabilizer 15. A plurality of tertiary air holes 21 are formed in the upper and lower stages on the peripheral walls of the small-diameter combustion cylinder 19 and the large-diameter combustion cylinder 20, and the small-diameter combustion cylinder 19 is formed at the bottom of the large-diameter combustion cylinder 20. Is formed on the outer periphery of the connecting portion with the secondary stabilizer 22 for rotating the tertiary air in the same direction as the primary stabilizer 15, and between the secondary stabilizer 22 and the tip connecting portion of the small-diameter combustion cylinder 19, A jet ejecting portion 23 composed of a plurality of slits is formed, and ejects the tertiary air as a laminar flow.
[0011]
The wind tunnel 3 is formed in a box shape in which one side is connected to the blower 2 and the bottom is connected to the burner outer cylinder 1 and the other is closed, and temporarily stores combustion air supplied from the blower 2. A first rectifying plate 25 having a plurality of primary rectifying holes 24 arranged in a circle so as to be orthogonal to the combustion air is provided on the side of the nozzle body 8 communicating with the burner outer cylinder 1 of the barrel 3. On the downstream side of the one rectifying plate 25, a cup-shaped rectifying tube guide 26 having a diameter overlapping with a circle drawn by the primary rectifying hole 24 and fitted with the end of the rectifying tube 4 is provided at one end opening. In addition, a plurality of second rectifying holes 27 are formed in the peripheral wall parallel to the flow of combustion air of the rectifying tube guide 26, and instead of forcibly pushing in, the combustion air flows in as a natural flow so that the primary air It will be.
[0012]
Reference numeral 28 denotes a third rectifying plate for fixing the fuel injection nozzle body 8 at the bottom of the rectifying cylinder 4 and for allowing primary air to flow into the rectifying cylinder 4. Three rectifying holes 29 are provided, and the primary air that has flowed into the rectifying cylinder guide 26 passes through the third rectifying hole 29 to be further rectified and supplied to the rectifying cylinder 4.
[0013]
Reference numeral 30 denotes a tertiary air outlet composed of a gap formed between the tip of the burner outer cylinder 1 and the tip of the burner inner cylinder 17, which supplies tertiary air to the flame formed outside the burner and suppresses the spread of the flame. is there.
Reference numeral 31 denotes an igniter connected to the ignition electrode 9.
[0014]
Next, the operation of one embodiment of the present invention will be described.
If the blower 2 and the electromagnetic pump 6 are now driven, the combustion air is first supplied into the wind tunnel 3, where it is temporarily stored, and after eliminating the directionality due to the rotational force, the flow is directed downward, and is orthogonal to this flow. By passing through the first rectifying hole 24 of the first rectifying plate 25 arranged as described above, rectification is performed so that the flow direction is entirely matched, and the flow of the rectifying tube guide 26 parallel to the flow direction flows through the air passage 5. The air is naturally rectified from the second rectifying hole 27 and flows into the rectifying tube guide 26, and then the final rectification is performed through the third rectifying hole 29 of the third rectifying plate 28, so that the primary air is completely moved downward. The flow is supplied into the rectifying cylinder 4.
[0015]
The primary air that has flowed into the rectifying cylinder 4 is collected by the bowl-shaped converging body 11 and discharged into the burner inner cylinder 18 together with the fuel injected from the nozzle body 8 through the central hole 10. At the same time, the primary stabilizer 15 forms a swirling flow of secondary air on the outer periphery of the mixture of primary air and fuel to improve the mixing of the secondary air and reduce the small diameter. Primary combustion and secondary combustion are performed in the combustion cylinder 19, and in the large-diameter combustion cylinder 20, fresh tertiary air is supplied from the upper and lower tertiary air holes 21, and swirled tertiary air is supplied from the secondary stabilizer 22. When supplied, tertiary combustion is performed, and a large flame is formed on the outside to achieve good quaternary combustion.
[0016]
Further, at this time, the laminar tertiary air is supplied from the jet ejection portion 23 between the swirl flow by the primary stabilizer 15 and the swirl flow of the secondary stabilizer 22, so that the two swirl flows are within the large-diameter combustion cylinder 20. It is not integrated immediately, but after finely diffusing and mixing individually, good quaternary combustion can be obtained by mixing outside the burner at the tip of the large-diameter combustion cylinder 20. In the quaternary combustion, the tertiary air that suppresses the outward spread of the flame is supplied from the tertiary air outlet 30 to perform better combustion.
[0017]
Further, in the central hole 10 portion of the focusing body 11, the gap is completely blocked by the stepped portion 16 and the standing wall 17, so that secondary air having a high flow velocity is not supplied from the outer periphery, and the primary air There is no need to disturb the flow velocity, and good combustion can always be obtained.
[0018]
Further, the combustion air supplied to the combustion section as primary air, secondary air, and tertiary air is reliably rectified by the wind tunnel 3 and the rectifying cylinder guide 26 that are the inlets, so that the combustion air has no deviation in the flow direction or amount. In particular, the primary air is rectified for the second, third and third times, and good combustion is always performed without causing abnormal combustion.
[0019]
Further, the first rectifying hole 24 is orthogonal to the flow of the combustion air, so that the entire combustion air can be forcibly rectified, and the rectification in the basic flow direction is surely performed. In parallel with the flow of combustion air, the primary air can naturally flow in, so that smooth combustion without soot can always be performed.
[0020]
【The invention's effect】
As described above, according to the present invention, a laminar flow from the laminar flow ejection portion is formed between the swirling flow by the primary stabilizer and the swirling flow by the secondary stabilizer, and two in the large-diameter combustion cylinder The swirl flows do not interfere and do not become one, and after each of the swirl flows diffuses and mixes well, good tertiary combustion is performed outside the burner. The flow of the tertiary air flows around the outer periphery to suppress the outward spread of the flame, and the fourth combustion outside the burner is supplied with the tertiary air that suppresses the outward spread of the flame from the tertiary air outlet 30. Thus, even better combustion can be performed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a gun type burner with an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the main part. FIG. 3 is an enlarged cross-sectional view of the tip of the focusing body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Burner outer cylinder 2 Blower 4 Rectifier cylinder 5 Air passage 8 Nozzle body 13 Secondary air hole 15 Primary stabilizer 18 Burner inner cylinder 19 Small diameter combustion cylinder 20 Large diameter combustion cylinder 22 Secondary stabilizer 23 Laminar flow outlet 30 Tertiary air outlet

Claims (1)

To form an air passage between the burner outer cylinder on the inner side of the burner outer cylinder, a flow-guide cylinder provided with a primary stabilizer to pivot the nozzle body and the secondary air for fuel injection, a plurality of air holes in the peripheral wall A small-diameter combustion cylinder connected to a rectifying cylinder so as to surround the primary stabilizer, wherein the burner inner cylinder is provided with a blower for supplying combustion air behind the burner outer cylinder. And a large-diameter combustion cylinder connected to the tip of the small-diameter combustion cylinder, and a secondary stabilizer is provided on the outer periphery of the connecting portion between the tip of the small-diameter combustion cylinder and the large-diameter combustion cylinder. Between the secondary stabilizer and the tip of the small-diameter combustion cylinder, a laminar flow ejection portion that ejects the tertiary air of the laminar flow with the outer diameter of the small-diameter combustion cylinder is formed, and further, the tip of the large-diameter combustion cylinder and the burner outer cylinder Between the tip and the outer diameter of the large-diameter combustion cylinder, the laminar tertiary air Gun type burner, characterized in that the formation of the tertiary air injection ports comprising a plurality of gaps to be ejected.

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