JP2001182911A - Burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a burner, which is easy to assemble and has the high accuracy of the position of a burner port member by improving the burner of press formed structure with thick and thin fuel combustion. SOLUTION: The burner comprises a combustion tube main body 2, a pair of side plate members 3 and a burner port member 5. The burner port member 5 is arranged in the space between the inner surface plates 2 and 3 of the side plate members 3. When the burner port member 3 is placed at the proper position between the side plate members 3, protrusions 40 and 41 formed on the burner port member 5 engage with openings 21 and 22. At the assembling of a burner 1, the right and left side plate members 3 and the combustion tube main body 5 are fit together before being joined by spot welding and then the burner port member 5 is thrust into a groove 48. As the edge side of the protrusion 41 of the burner port member 5 has a sharp angle, the protrusion 41 is superior in stretching the inner surface plate 23 of the side plate member 3 at the insertion and the protrusion 41 can be thrust into the groove 48 smoothly. When the protrusions 40 and 41 engage with the openings 21 and 22 arranged to the side plate members 3, the burner port 5 cannot be pulled out easily, as either of the upper surface sides 40a and 41a of the protrusions 40 and 41 is vertical to a main body 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device, and more particularly to a combustion device suitable for application to a small boiler or a hot water supply device.

[0002]

2. Description of the Related Art A combustion device is a main component of a boiler or a hot water supply device, and is widely used not only in factories but also in general households. By the way, in recent years, environmental destruction due to acid rain has become a serious social problem, and there is an urgent need to reduce the total emission of NO _X (nitrogen oxide). Therefore, a device for minimizing the generation of NO _X is also required for a small-sized combustion device for home use or the like.

As a countermeasure for reducing the NO _X in the field of compact combustion devices, a method of burning fuel gas in a lean state is considered. However, when the fuel gas is diluted and burned, the flame lifts and the flame becomes inevitably unstable. Therefore, as a countermeasure, adoption of a combustion method called light-and-dark combustion has attracted attention. Here, the rich / lean combustion means that a main flame is generated from a lean fuel gas (hereinafter referred to as a light mixed gas) in which fuel gas is preliminarily mixed with about 1.6 times the theoretical air amount of air.
In the vicinity of the main flame, a supplementary flame generated from a fuel gas having a low air mixing amount and a high concentration (hereinafter referred to as a rich mixed gas) is arranged.

[0004] In addition, small-sized combustion devices for home use and the like are required to be smaller and easier to manufacture. The present applicant has the reduction of NO _X, to achieve both size reduction and manufacturing ease, previously proposed a combustion apparatus of a press structure (Japanese Patent No. 2710909) the combustion device present applicant has proposed 1
Reference numeral 00 denotes a combustion tube main body 102 and a flame hole member 103 arranged between two side plate members 101 as shown in FIG. In the combustion device 100, the inside of the side plate member 101 is hollow. The rich mixed gas is supplied into the side plate member 101, and the rich mixed gas is injected from the rich gas flame hole 105. The flame hole member 103 is formed by stacking a plurality of partition plates, and communicates with each other in a vertical direction by a gap between the partition plates. Then, a light mixed gas is supplied between the side plate members 101 from the lower side. In this way, the light mixed gas is injected from the flame hole member 103 to generate a main flame, and the side plate member 10
A rich mixed gas is injected from one of the rich gas flame holes 105 to form a supplementary flame. The main flame is surrounded by the supplementary flame and burns stably.

[0005] In the prior art combustion apparatus 100, as a measure for preventing the flame hole member 103 from falling off, FIG.
As in the first embodiment, a configuration is employed in which the end of the side plate member 101 is folded, and the flame hole member 103 is pressed by the folded portion. That is, the conventional combustion device 100 includes two side plate members 101, a combustion tube main body 102 and a flame hole member 103.
Are separately molded, the combustion tube main body 102 is sandwiched in a lower portion between the two side plate members 101, and the flame hole member 103 is sandwiched in a groove-shaped portion formed by the two side plate members 101. Finally, as shown in FIG. 11, the claw-shaped portion 106 at the end of the side plate member 101 is bent, and the claw-shaped portion 106 is
3 to prevent the flame hole member 103 from falling off. Further, in addition to or instead of the above-described measure, the two side plate members 101 are spot-welded.
And the flame hole member 103 may be integrated.

[0006]

The combustion apparatus 100 proposed by the present applicant has a press structure and can be manufactured relatively easily. However, the combustion device of the prior art employs a method of preventing the flame hole member 103 from falling off by bending the end portion of the side plate member 101 so as to prevent the flame hole member 103 from falling off.
Therefore, in the final step of assembly, the claw portion 106 at the end must be folded back. That is, in the prior art, after the flame hole member 103 is sandwiched between the two side plate members 101, the claw-shaped portions 10 are formed.
Step 6 must be performed.

[0007] The claw-shaped portion 106 of the folded portion described above
It is located at the end, and each member is formed by bending a plate. Therefore, errors and variations in the bending process are accumulated on the claw-shaped portion 106 at the end. Therefore, the claw-shaped portion 106 in the folded portion is the position where the dimensional accuracy is most difficult to be secured, and the position and size are likely to vary. Therefore, the fixing position of the flame hole member 103 in the vertical direction tends to vary. Therefore, the conventional combustion device 10
In the case of 0, the positional relationship between the main flame generated from the flame hole member 103 and the positional relationship between the auxiliary flame generated from the side plate member 101 is likely to vary, and there is a concern that the holding action by the auxiliary flame may be impaired.

As another problem, the side plate member 101
There is a problem that the concentration of the rich mixed gas injected from the rich gas flame hole 105 tends to vary. That is, the primary air and the fuel gas are mixed in the combustion tube main body 102, and the mixed gas having a high concentration is supplied to the side plate member 101. However, in the prior art, the combustion tube body 10
2 may not be sufficiently mixed, the concentration of the concentrated mixed gas in the side plate member 101 may vary, and combustion with a gas having an excessively high concentration may cause significant generation of NOx. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to develop a combustion apparatus which is easy to assemble and has high positional accuracy of a flame hole member, focusing on the above-mentioned problems of the prior art. Another object of the present invention is to develop a combustion apparatus that can adjust the concentration of the mixed gas in the side plate member to an appropriate concentration and can perform ideal lean-burn combustion.

[0010]

According to the first aspect of the present invention, a fuel gas having a high concentration is introduced into the inside and a fuel gas having a high concentration is injected from the inside. There are two or more side plate members provided with a flame hole, and a flame hole member that generates a flame from the upper end by communicating with the upper and lower surfaces when the whole shape is elongated and placed horizontally. The flame hole member is disposed in a state sandwiched between the portions surrounded by the two side plate members, and the low concentration fuel gas is guided to the region surrounded by the two side plate members, and the concentration of the fuel gas is reduced from the flame hole member. In a combustion device in which a low fuel gas is injected, a flame in which a low-concentration fuel gas burns on the upper surface of the flame hole member, and a flame in which a high-concentration fuel gas burns from the flame hole of the side plate member, Protrusion on one of side plate member or flame hole member A combustion device, wherein a recess or an opening is provided in the other of the side plate member or the flame hole member, and the projection and the recess or the opening are engaged to hold the flame hole member between the side plate members. It is.

In the combustion apparatus according to the present invention, a projection is provided on one of the side plate member and the flame hole member, and a concave portion or an opening is provided on the other of the side plate member or the flame hole member. Thus, the flame hole member is held between the side plate members.
Therefore, the folding work and the welding work, which are indispensable in the prior art, are unnecessary.

According to a second aspect of the present invention, the side plate member has a double wall formed of a thin plate, and an opening is provided in a projection or a concave portion provided on the side plate member, and the opening is provided by the opening. The combustion apparatus according to claim 1, wherein the inside of the double wall and a portion surrounded by the two side plate members communicate with each other.

In the combustion apparatus of the present invention, an opening is provided in the projection or the concave portion provided in the side plate member, and the opening communicates the inside of the double wall of the side plate member with the portion surrounded by the two side plate members. I do. Therefore, in the combustion device of the present invention, the air passing through the portion surrounded by the two side plate members is introduced into the double wall of the side plate members, and the concentration of the fuel gas in the side plate members is appropriately reduced.

According to a third aspect of the present invention, the flame hole member is formed by stacking a plurality of partition plates, and a projection is provided from one of the partition plates, and an opening is formed in the projection. The side plate member is provided with an opening, and the projection of the flame hole member is engaged with the opening of the side plate member so that the opening provided on the projection of the partition plate and the opening provided on the side plate member communicate with each other. The combustion apparatus according to claim 1 or 2, wherein:

In the combustion apparatus of the present invention, the flame hole member is formed by stacking a plurality of partition plates, and a gas flow path is formed by the gap between the partition plates. In the combustion device of the present invention, a projection having an opening is provided from one of the partition plates, and the projection engages with the opening provided on the side plate member, and the opening of the partition plate communicates with the opening of the side plate member. . As a result, in the combustion device of the present invention, the inside of the side plate member communicates with the gas flow path inside the flame hole member. Here, generally, the flow velocity of the gas flowing through the flame hole member is faster in the inner flow path. Therefore, in the present invention, the gas flow path having a high flow velocity and the inside of the side plate member communicate with each other, and air is more smoothly introduced into the inside of the side plate member.

Further, according to a fourth aspect of the present invention, the flame hole member is provided with a projection projecting from the flame hole member main body, and the side plate member is provided with a concave portion or an opening which engages with the projection. The combustion device according to any one of claims 1 to 3, wherein an angle of the provided projection with respect to the flame hole member main body is larger on the flame hole side than on the other side.

When assembling the combustion apparatus of the present invention, two side plate members are combined in advance to form a groove-shaped gap into which the flame hole member is inserted. Then, the flame hole member is pushed in from the upper opening of the gap formed by the two side plate members. Here, in the combustion device of the present invention, the angle of the projection provided on the flame hole member with respect to the flame hole member main body portion is different between the flame hole side and the other side, and the flame hole side is larger than the other side. In other words, the projection has an acute angle toward the insertion direction of the flame hole member and an obtuse angle toward the removal direction. Therefore, in the combustion device of the present invention, the flame hole member is easily inserted at the time of assembling, and the flame hole member is not easily pulled out.

Further, according to a fifth aspect of the present invention, there are provided two or more side plate members provided with a flame hole through which a high concentration fuel gas is introduced and from which a high concentration fuel gas is injected, and Is a long shape, and has a flame hole member for generating a flame from the upper end when the surface placed vertically is in a state of being placed horizontally, and the flame hole member is surrounded by two side plate members The fuel gas having a low concentration is guided to a portion surrounded by the two side plate members, and the fuel gas having a low concentration is injected from the flame hole member. An opening is provided in the side plate member in a combustion device in which a flame in which the fuel gas having a low concentration burns is generated, and a flame in which the fuel gas having a high concentration burns is generated from the flame hole of the side plate member, and the opening forms the two side plate members. Inside the heavy wall and two side plate members Thus the site surrounded is a combustion device, characterized in that the communicating.

According to the combustion apparatus of the present invention, the above-mentioned claim 2 is provided.
Similarly to the invention described in the above, since the inside of the double wall of the side plate member and the portion surrounded by the two side plate members communicate with each other, air passing through the portion surrounded by the two side plate members is The fuel gas is introduced inside and the concentration of the fuel gas in the side plate member is appropriately reduced.

[0020]

Embodiments of the present invention will be described below. In the following description, the term “up and down” refers to a state in which the combustion device 1 is installed with the flame hole facing upward. FIG.
1 is a perspective view of a combustion device according to an embodiment of the present invention. FIG.
FIG. 2 is an exploded perspective view of the combustion device of FIG. FIG.
FIG. 2 is an exploded perspective view of a main part of the combustion device of FIG. FIG. 4 is an enlarged perspective view of a projection provided on the flame hole member. FIG. 5 is a cross-sectional view of the upper portions of the flame hole member and the two side plate members. FIG.
FIG. 4 is a cross-sectional view in a state where a flame hole member is inserted into upper portions of two side plate members. FIG. 7 is a cross-sectional view taken along the plane A of FIG. FIG. 8 is a cross-sectional view taken along a plane B in FIG. FIG. 9 is a cross-sectional view corresponding to FIG. 7 of a combustion apparatus according to another embodiment of the present invention.

The combustion apparatus 1 of the present embodiment is used in a case in parallel with a case or used alone.
The configuration of the combustion device 1 includes a combustion tube main body 2, two side plate members 3 and a flame hole member 5 as shown in FIG. 2. The combustion tube main body 2 is formed by pressing a single steel plate to form a developed figure having irregularities on its surface, bending the formed figure, and then joining it by spot welding.

The combustion tube body 2 employed in the present embodiment has a fuel gas introduction hole 14 as shown in FIGS. 1 and 2 in the lower corner, similarly to the known one, and has a cross-sectional area inside. The flow path changes direction greatly, and the mixing section 11
Are formed. The upper side surface of the combustion tube main body 2 has an uneven shape. The projection has a large-diameter hole 16. A small-diameter opening 17 is provided in a concave portion on the upper side surface of the combustion tube main body 2.

The side plate member 3 is formed by pressing a thin sheet of steel and then bending it. As shown in FIGS. 2 and 3, the inner plate 23 and the outer plate 25 are arranged with a gap therebetween. It is provided with a narrow top portion 34, and the other periphery is folded so as to prevent gas leakage. The space 13 closed by the gap between the inner plate 23 and the outer plate 25 is formed inside the side plate member 3. That is, the side plate member 3
Has a double wall structure of an inner plate 23 and an outer plate 25, and the inside is hollow. At the center of the side plate member 3, a hole 31 for introducing a rich mixed gas into the inside is provided as shown in FIG.

Further, as a configuration unique to the present embodiment, a pair of openings 21 and 22 as shown in FIGS. 2 and 3 are provided in a row in the horizontal direction on the side of the inner plate 23 of the side plate member 3. ing. Here, the opening 2 provided above the set of the openings 2
1 is a substantially rectangular hole. Another opening 22
Has a substantially square shape, and is provided immediately below the opening 21. Since the two side plate members 3 are combined as one set, the space 13 in the double wall of the side plate member 3 and the portion surrounded by the two side plate members 3 communicate with each other by the openings 21 and 22. .

Next, the flame hole member 5 will be described. The flame hole member 5 employed in the combustion device 1 of the present embodiment is shown in FIGS.
It is a quadrangular prism-like and has a long shape. Specifically, the flame hole member 5 is formed by stacking six strip-shaped partition plates 20a to 20f as shown in FIG. Each partition plate 20a to 20f is embossed,
The whole is waving in an uneven shape.

When each of the partition plates 20a to 20f is folded, a gap is formed in each of the partition plates 20a to 20f in the vertical direction by embossed irregularities, and the gap becomes a gas flow path. The flame hole member 5 employed in the present embodiment has a pair of protrusions 40 and 41 provided on a side surface thereof in a line in a horizontal direction. Here, the shape of the projection 40 provided on the upper part is substantially triangular as shown in FIG. The projections 40 are provided by forming parallel cuts in the partition plates 20a and 20f disposed on both side surfaces of the partition plates 20a to 20f constituting the flame hole member 5, and the central portion thereof is bent out. 42 is parallel to the main body portion 43. Further, since the projections 40 are formed by forming cuts in parallel as described above and folding them out, the upper and lower surfaces 40
Both a and 40b are perpendicular to the main body portion 43. The upper and lower surfaces 40a and 40b of the projection 40 have openings 4 respectively.
6 are formed. Since the opening 46 is provided in the outermost partition plates 20a and 20f, the opening 46 communicates with the gas flow path inside the flame hole member 5.

On the other hand, the projection 41 provided at the lower portion is provided with one cut horizontally and the lower portion thereof is bent, and the ridge 45 is inclined with respect to the main body portion 43. That is, the upper surface 41 a of the projection 41 is perpendicular to the main body portion 43, but the other side is at an acute angle to the main body portion 43. In other words, the angle of the protrusion 41 provided on the flame hole member 5 with respect to the flame hole member body 43 is larger on the flame hole side (upper part in the drawing) than on the other side. Projection 4 provided at the bottom
The shape of the upper surface 41a of one is the same as the shape of the lower surface 40b of the protrusion 40 provided on the upper portion. An opening 47 is formed in the upper surface 41 a of the projection 41.

Next, the relationship between each member of the combustion apparatus 1 of the present embodiment will be described. Combustion device 1 of the present embodiment
In the figure, the side plate members 3 are arranged on the left and right of the combustion tube main body 2, and the flame hole member 5 is mounted between the side plate members 3 at the upper part of the combustion tube main body 2. The positional relationship between the combustion tube main body 2 and the side plate member 3 is such that the side plate member 3 is arranged in parallel with the top of the combustion tube main body 2 protruding from the top 24. In other words, the top 24 of the combustion tube main body 2 is below the top 34 of the side plate member 3, and the combustion tube main body 2 is in a valley sandwiched by the side plate members 3. Therefore, at the top portion 24 of the combustion tube main body 2, there is a space sandwiched between the inner surface plates 23 of the side plate members 3.

Further, when the combustion tube main body 2 and the side plate member 3 are assembled, the hole 16 provided in the convex portion on the upper side surface of the combustion tube main body 2 is provided at the center of the side plate member 3 as shown in FIG. The combustion tube main body 2 and the side plate member 3 communicate with each other. Further, the recess on the upper side surface of the combustion tube main body 2 and the side plate member 3
8, there is a gap as shown in FIG. 8, and a small-diameter hole 17 provided in the combustion tube main body 2 opens into the gap. The gap between the concave portion on the upper side surface of the combustion tube main body 2 and the side plate member 3 is:
Functions as an air inlet.

The flame hole member 5 is a space sandwiched between the inner surface plates 23 of the side plate member 3 and is disposed at a position slightly away from the top 24 of the combustion tube main body 2. And the flame hole member 5
Are disposed at regular positions between the side plate members 3, the projections 40 and 41 provided on the flame hole member 5 engage with the openings 21 and 22 provided on the side plate member 3.

The procedure for assembling the combustion device 1 is as follows. That is, when assembling the combustion apparatus 1, the left and right side plate members 3 and the combustion tube main body 2 are combined first,
Joined by spot welding or the like. As a result, FIGS. 3 and 5
The left and right side plate members 3 and the combustion tube main body 2
A groove 48 having an open top is formed. And the groove 48
The flame hole member 5 is pushed into the inside. Here, in the present embodiment, the protrusions 40 and 41 are provided on the flame hole member 5.
Since the projection 41 provided at the lower portion has an acute angle on the distal end side, it is excellent in an action of pushing and expanding the inner surface plate 23 of the side plate member 3 at the time of insertion. Therefore, the protrusion 41 of the flame hole member 5 is
Go smoothly into 8. The lower surface 41b of the protrusion 40 provided on the upper side is perpendicular to the main body 43, but the protrusion 40 is located immediately above the protrusion 41, and the size and shape of the lower surface 40b are Since it is the same as the upper surface 41a of the projection 41 provided at the lower portion, the portion of the projection 40 also smoothly enters the groove 48 following the lower projection 41. When the flame hole member 5 is set in a predetermined position of the groove 48, the upper protrusion 40 provided on the flame hole member 5
The lower projection 41 provided on the flame hole member 5 is engaged with the lower opening 22 provided on the side plate member 3.

The projections 40 and 41 of the flame hole member 5 are
However, when engaging with the openings 21 and 22 provided in the side plate member 3, since the upper surface sides 40 a and 41 a of the projections 40 and 41 are both perpendicular to the main body 43, the flame hole member 5 does not easily come off.

Next, the flow of fuel gas and air in the combustion apparatus 1 of the present embodiment will be described. In the combustion device 1 of the present embodiment, the rich mixed gas discharged from the combustion tube main body 2 into the space between the side plate members 3 is mixed with the air entered from the lower opening 18, becomes a light mixed gas, and rises upward. Then, the light mixed gas is injected into the outside air through the gap of the flame hole member 5,
Generates main flame.

A rich mixed gas is introduced from the combustion tube main body 2 into the side plate member 3 through the holes 16 and 31. In the combustion device 1 of the present embodiment, air (specifically, a light mixed gas) is introduced into the side plate member 3 from the openings 21 and 22 provided in the side plate member 3, and the rich mixed gas is appropriately diluted. . Describing in more detail, the openings 21 and 22 provided in the side plate member 3 open in a groove-shaped gap portion sandwiched between the top portion 24 of the combustion pipe main body 2 and the inner surface plate 23 of the side plate member 3. A light mixed gas passes through the inside of the shape.
Therefore, the light mixed gas flows into the side plate member 3 from the openings 21 and 22 provided in the side plate member 3.

In the present embodiment, the projections 40 and 41 are engaged with the openings 21 and 22, however, since the projections 40 and 41 are provided with openings, the partition plates 20a,
Light mixed gas passage and side plate member 3 formed inside 20f
The light mixed gas flows into the side plate member 3 from the flow path. Further, in particular, in the combustion device 1 of the present embodiment, since the cut-and-raised portion of the projection 41 that engages with the lower opening 122 faces in an oblique direction, the light mixed gas flows into the side plate member 3 along the cut and raised. Flow into Therefore, the inflow of air into the side plate member 3 is smooth, and the combustion gas is diluted to an appropriate concentration in the side plate member 3.

Then, the rich mixed gas is injected from a rich gas flame hole 35 provided on the top surface of the side plate member 3,
Combustion to generate supplementary flame. Therefore, in the combustion device 1 according to the present embodiment, substantially the entire circumference of the flame hole member 5 is surrounded by the supplementary flame generated by the rich gas flame hole 35. In addition, NO _X generated from supplementary flame is small.

In the embodiment described above, air is introduced into the side plate member 3 from the openings 21 and 22 with which the projections 40 and 41 of the flame hole member 5 engage.
Further, another opening 50 may be provided in the groove-shaped gap portion between the inner surface plates 23 of the side plate member 3 as shown in FIG. 9 to introduce air into the inside of the side plate member 3. Further, in the present embodiment, the openings 21 and 22 are provided in the side plate member 3, but a concave portion (having no opening portion) is provided instead of the opening, and the projections 40 and 41 of the flame hole member 5 are engaged with the concave portion. , Side plate member 3
It is also possible to introduce air from another opening (for example, opening 50 in FIG. 9). Further, in the present embodiment, the openings 21 and 22 are provided on the side plate member 3 side, and the projections 40 and 41 are provided on the flame hole member 5 side. Conversely, the projection is provided on the side plate member 3 side and the flame hole member 5 An opening or a recessed portion that engages with the opening may be provided.

[0038]

As described above, in the combustion apparatus according to the first aspect, the projection is provided on one of the side plate member and the flame hole member, and the concave portion or the opening is provided on the other of the side plate member or the flame hole member. The projection and the recess or the opening are engaged with each other, so that the flame hole member is held between the side plate members. Therefore, in the combustion apparatus according to the present invention, a folding operation for fixing the flame hole member and a welding operation as in the related art are unnecessary. Therefore, the combustion device of the present invention is easy to assemble and suitable for mass production. Further, in the combustion device of the present invention, since the positioning accuracy of the flame hole member is improved, the supplementary flame is arranged at an appropriate position and holds the main flame firmly. Therefore, the combustion device of the present invention has an effect that the main flame can be stably burned.

Further, in the combustion apparatus according to the second and fifth aspects, the inside of the side plate member communicates with a portion surrounded by the two side plate members by the opening provided in the side plate member. Therefore, in the combustion device of the present invention, the air passing through the portion surrounded by the two side plate members is introduced into the double wall of the side plate members, and the concentration of the fuel gas in the side plate members is appropriately reduced. Therefore, there is an effect of generating a supplementary flame having an appropriate gas concentration.

In the combustion device according to the third aspect, the gas flow path inside the flame hole member having a high flow velocity communicates with the inside of the side plate member, and there is an effect that air is more smoothly introduced into the inside of the side plate member.

Further, in the combustion apparatus according to the fourth aspect, the angle of the projection provided on the flame hole member with respect to the flame hole member main body portion is different between the flame hole side and the other side, and the flame hole side is larger than the other side. Therefore, it is easy to insert the flame hole member at the time of assembly, and it is difficult for the flame hole member to come off. Therefore, the combustion device of the present invention has an effect that it is easy to assemble and has a high action of maintaining its position and shape.

[Brief description of the drawings]

FIG. 1 is a perspective view of a combustion device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the combustion device of FIG.

FIG. 3 is an exploded perspective view of a main part of the combustion device of FIG. 1;

FIG. 4 is an enlarged perspective view of a projection provided on a flame hole member.

FIG. 5 is a cross-sectional view of an upper portion of a flame hole member and two side plate members.

FIG. 6 is a cross-sectional view in a state where a flame hole member is inserted into upper portions of two side plate members.

FIG. 7 is a cross-sectional view taken along a plane A in FIG.

FIG. 8 is a cross-sectional view taken along a plane B in FIG. 1;

FIG. 9 is a sectional view corresponding to FIG. 7 of a combustion apparatus according to another embodiment of the present invention.

FIG. 10 is an exploded perspective view of a conventional combustion device.

FIG. 11 is an explanatory view showing steps when assembling a conventional combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion device 2 Combustion pipe main body 3 Side plate member 5 Flame hole member 20a-20f Partition plate 23 Inner plate 25 Outer plate 21,22 Opening 40,41 Projection 40a, 41a Upper surface of projection 46,47 Opening

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takao Morigaki 93 Edocho, Chuo-ku, Kobe, Hyogo Pref. (72) Inventor Itsuo Nagai 93, Edo-cho, Chuo-ku, Kobe, Hyogo Prefecture Inside Noritz Corporation (72) Inventor Takeshi Wakata 93, Edo-cho, Chuo-ku, Kobe City, Hyogo Prefecture Noritsu Corporation (72) Masaru Hiroyasu 93F, Edo-cho, Chuo-ku, Kobe-shi, Hyogo F-term in Noritz Corporation (reference) 3K017 AA02 AA06 AA10 AB02 AB09 AD08 3K065 TA01 TA15 TB13 TD04 TH04

Claims (5)

[Claims] 1. A high-concentration fuel gas is introduced into the inside, and two or more side plate members provided with a flame hole for injecting the high-concentration fuel gas from the inside, and a horizontally long overall shape is provided. When placed on the surface, the upper and lower surfaces communicate with each other and have a flame hole member that generates a flame from the upper end, and the flame hole member is arranged in a state sandwiched by a portion surrounded by the two side plate members. A low-concentration fuel gas is guided to a portion surrounded by the two side plate members, and the low-concentration fuel gas is injected from the flame hole member, and the low-concentration fuel gas burns on the upper surface of the flame hole member. Is generated, a flame is generated from the flame hole of the side plate member in which a fuel gas having a high concentration burns, a protrusion is provided on one of the side plate member or the flame hole member, and the other of the side plate member or the flame hole member is provided with a projection. Is provided with a recess or opening, and A combustion device wherein the recess or the opening is engaged to hold the flame hole member between the side plate members. 2. The side plate member has a double wall made of a thin plate, and an opening is provided in a projection or a concave portion provided on the side plate member. The combustion device according to claim 1, wherein a portion surrounded by the side plate member communicates. 3. The flame hole member is formed by stacking a plurality of partition plates, a projection is provided from one of the partition plates, an opening is formed in the projection, and an opening is formed in the side plate member. The projection of the flame hole member is provided and engages with the opening of the side plate member, and the opening provided in the projection of the partition plate and the opening provided in the side plate member communicate with each other. Combustion equipment. 4. The flame hole member is provided with a projection projecting from the flame hole member main body, the side plate member is provided with a concave portion or an opening engaging with the projection, and the projection hole member of the projection provided on the flame hole member is provided. The combustion device according to any one of claims 1 to 3, wherein an angle with respect to the main body portion is larger on the flame hole side than on the other side. 5. Two or more side plate members provided with a flame hole through which a high-concentration fuel gas is introduced and a high-concentration fuel gas is injected from the inside; When placed on the surface, the upper and lower surfaces communicate with each other and have a flame hole member that generates a flame from the upper end, and the flame hole member is arranged in a state sandwiched by a portion surrounded by the two side plate members. A low-concentration fuel gas is guided to a portion surrounded by the two side plate members, and the low-concentration fuel gas is injected from the flame hole member, and the low-concentration fuel gas burns on the upper surface of the flame hole member. In a combustion device in which a flame in which high-concentration fuel gas burns is generated from the flame holes of the side plate member, an opening is provided in the side plate member, and the opening forms the inside of the double wall of the side plate member and the two side plates. Communicates with the part surrounded by the member A combustion device, characterized in that: