JP4077360B2 - 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. A burner inner cylinder provided with a plurality of air holes in the peripheral wall, and a blower for supplying combustion air behind the burner outer cylinder to reduce noise during combustion. There was something that tried to get combustion. (For example, refer to Patent Document 1.)
[0003]
[Patent Document 1]
Japanese Patent No. 2828865 [0004]
[Problems to be solved by the invention]
By the way, in this conventional type, since the combustion air from the blower flows into the rectifying cylinder as primary air without being rectified, the vortex flow due to the rotation of the blower is not cured in the rectifying cylinder, and the primary air flowing in by the vortex flow before the inflow Since the amount differs depending on the inflow location, the supply of primary air is not always stable, and the amount of combustion air becomes more unstable, and there is a risk of abnormal combustion due to air shortage.
[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, A box-shaped wind tunnel for temporarily storing combustion air from the blower is provided at the rear end of the burner outer cylinder, and a first rectifying hole having a plurality of first rectifying holes orthogonal to the flow of the combustion air is provided on the nozzle body side of the wind tunnel. A rectifying plate is provided, and further provided on the downstream side of the first rectifying plate is a rectifying tube guide that communicates with the rectifying tube and has a plurality of second rectifying holes formed in a peripheral wall parallel to the flow of combustion air.
[0006]
According to this, the vortex of the combustion air supplied from the blower is suppressed in the box-shaped wind tunnel, and is forcedly rectified by passing through the first rectification hole orthogonal to the flow direction of the combustion air, Furthermore, the combustion air is naturally supplied to the rectifying cylinder through the second rectifying hole parallel to the flow of the combustion air in the rectifying cylinder guide, so that the rectification is reliably rectified, and the flow direction and amount are shifted. In particular, primary air is stably supplied and good combustion is always 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, on the outer periphery of the focusing body 11, there are swirl vanes 13 formed by cutting and raising secondary air flowing in from the plurality of secondary air holes 12 formed in the peripheral wall around the central hole 10. A primary stabilizer 14 is provided that is rotated and supplied.
[0009]
Further, in the periphery of the central hole 10 where the focusing body 11 and the primary stabilizer 14 are in contact, the secondary air from the two gaps collides with the primary air from the central hole 10 vertically from the entire circumference, thereby disturbing the primary air. In order to prevent poor combustion with the injected fuel and prevent good combustion from being obtained, a stepped portion 15 that is in close contact with the primary stabilizer 14 is formed around the central hole 10 to further reliably provide the secondary. A standing wall 16 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]
Reference numeral 17 denotes a burner inner cylinder that is provided inside the burner outer cylinder 1 while holding the air passage 5 like the rectifying cylinder 4, and includes a small-diameter combustion cylinder 18 and a large-diameter combustion cylinder 19 that are connected to the tip of the primary stabilizer 14. A plurality of tertiary air holes 20 are formed in two stages on the peripheral walls of the small-diameter combustion cylinder 18 and the large-diameter combustion cylinder 19, and the small-diameter combustion cylinder 18 is formed at the bottom of the large-diameter combustion cylinder 19. A secondary stabilizer 21 for turning the tertiary air in the same direction as the primary stabilizer 14 is formed on the outer periphery of the connecting portion.
[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 23 in which a plurality of primary rectifying holes 22 are arranged in a circle so as to be orthogonal to the combustion air is provided on the nozzle body 8 side of the barrel 3 communicating with the burner outer cylinder 1. On the downstream side of one rectifying plate 23, a cup-shaped rectifying tube guide 24 is provided that has a diameter overlapping with a circle drawn by the primary rectifying hole 22 and is fitted with the end of the rectifying tube 4 at one end opening. Further, a plurality of second rectifying holes 25 are formed in the peripheral wall parallel to the flow of the combustion air of the rectifying tube guide 24, 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 26 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 27 are provided, and the primary air flowing into the rectifying cylinder guide 24 is further rectified and supplied to the rectifying cylinder 4 by passing through the third rectifying hole 27.
[0013]
Reference numeral 28 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.
An igniter 29 is 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 22 of the first rectifying plate 23 arranged as described above, rectification is performed so that the flow direction is entirely matched, and the flow of the rectifying cylinder guide 24 parallel to the flow direction flows through the air passage 5. The air is naturally rectified from the second rectifying hole 25 and flows into the rectifying cylinder guide 24, and then the final rectification is performed through the third rectifying hole 27 of the third rectifying plate 26. 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 17 together with the fuel injected from the nozzle body 8 through the central hole 10. At the same time, the primary stabilizer 14 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. Furthermore, in the burner inner cylinder 17, fresh tertiary air is supplied from the upper and lower tertiary air holes 20, and swirled tertiary air is supplied from the secondary stabilizer 21, and a large flame is formed outward. Good combustion.
[0016]
Therefore, 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 24 that are the inlets, and 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.
[0017]
Further, the first rectifying hole 22 is orthogonal to the flow of the combustion air, so that all the combustion air can be forcibly rectified, and 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.
[0018]
【The invention's effect】
As described above, according to the present invention, the combustion air supplied from the blower is forced by passing through the first rectifying hole orthogonal to the flow direction of the combustion air, while suppressing the vortex flow in the box-shaped wind tunnel. The combustion air is naturally supplied to the rectification cylinder through the second rectification hole parallel to the flow of the combustion air in the rectification cylinder guide, so that the rectification is reliably rectified, and the flow direction In other words, the primary air is stably supplied and good combustion is always obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a gun type burner with an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Burner outer cylinder 2 Fan 3 Wind tunnel 4 Rectifier cylinder 5 Air passage 8 Nozzle body 14 Primary stabilizer 17 Burner inner cylinder 20 Tertiary air hole 22 First rectification hole 23 First rectification plate 24 Rectification cylinder guide 25 Second rectification hole 26 First Three straightening plates 27 Third straightening hole

Claims (2)

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 burner inner cylinder provided, and a blower for supplying combustion air behind the burner outer cylinder, and a box-like wind for temporarily storing combustion air from the blower at the rear end of the burner outer cylinder. A first rectifying plate provided with a plurality of first rectifying holes orthogonal to the flow of combustion air is provided on the nozzle body side of the wind tunnel, and further communicated with the rectifying tube downstream of the first rectifying plate. gun Tanpubana characterized was that provided with a gas flow-guide cylinder guide having a plurality of second rectifying holes in the peripheral wall parallel to the flow of combustion air. 2. The gun type burner according to claim 1, wherein the communication between the flow straightening tube and the flow straightening tube guide is performed by a plurality of third flow straightening holes formed in a third flow straightening plate to which a nozzle body for fuel injection is fixed. .

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