JP3475827B2 - Combustion equipment - Google Patents

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 and a hot water supply device, and is widely used not only in factories but also in general households. By the way, in recent years become the environmental destruction is serious social problems caused by acid rain, to reduce the total emissions of NO _X (nitrogen oxide) there is an urgent need. Therefore, even in a small-sized combustion device for home use, a device for reducing the generation of NO _x is required.

As a measure for reducing NO _x in the field of small 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 instable. Therefore, as a countermeasure against this, the adoption of a combustion method called dark and light combustion is drawing 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 the fuel gas is premixed with about 1.6 times the theoretical air amount of air.
In the vicinity of this main flame, a supplementary flame generated from a fuel gas with a small amount of air mixed and a high concentration (hereinafter referred to as a concentrated mixed gas) is arranged.

Further, a small-sized combustion apparatus for household use is required to be smaller and easier to manufacture. Therefore, the present applicant has previously proposed a press-structured combustion device in order to achieve both reduction of NO _x , downsizing, and easy manufacturing.
(Patent No. 2710909) A combustion apparatus 100 proposed by the present applicant has a flame hole member 102 disposed 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. Then, the concentrated mixed gas is supplied to the inside of the side plate member 101.
Further, a rich gas flame hole 103 for injecting a rich mixed gas is provided above the side plate member 101. Flame hole member 102
Is a stack of a plurality of partition plates and communicates with each other in the vertical direction by the gap between the partition plates. Then, between the side plate members 101, the light mixed gas is supplied from the lower side. Therefore, the light mixed gas is injected from the flame hole member 102 to generate a main flame, and the rich gas flame hole 103 of the side plate member 101 is generated.
From this, a rich mixed gas is injected and a supplementary flame is formed.

In the conventional combustion device 100, the supplementary flames produced by burning the rich mixed gas are arranged on both sides of the main flame produced by burning the light mixed gas, and the supplementary flames hold the main flame.
That is, in the conventional combustion device 100, the main flame 105 is elongated and elongated as shown in FIG. 13, and the auxiliary flames 106 are arranged on both sides in the longitudinal direction thereof.

[0006]

In the combustion apparatus 100 previously proposed by the present applicant, the auxiliary flames 106 are generated on both sides of the main flame 105 as described above, and the main flame 1 has the auxiliary flames 106.
Hold 05. However, in the conventional combustion device 100, the auxiliary flames 106 are simply arranged on both sides of the main flame 105, and the end portion side of the main flame 105, that is, C in FIG.
There is no inflamed inflammation 106 at the site indicated by. Therefore, the combustion apparatus 100 of the conventional technique has a problem that the main flame 105 near the end may be lifted, the main flame 105 is unstable, and the combustion state deteriorates.

Therefore, the present invention focuses on the above-mentioned problems of the prior art, and aims to develop a combustion apparatus capable of generating a supplementary flame without leakage around the main flame and performing stable combustion. It is what

[0008]

In order to achieve the above object, and, the problems described above
In order to achieve the present invention, the invention as set forth in claim 1 has a double wall constituted by a thin plate, in which a fuel gas having a high concentration is introduced and a fuel hole having a high concentration is injected from the inside. And two or more side plate members provided with, the overall shape is a long shape and has a flame hole member in which upper and lower surfaces are in communication when placed horizontally and the upper end is a flame hole,
The flame hole member is arranged such that two side surfaces having a large area of the flame hole member are sandwiched in a region surrounded by two side plate members, and a fuel gas having a low concentration is formed in a region surrounded by the two side plate members. Is introduced to inject a low-concentration fuel gas from the flame hole of the flame hole member, and a flame of burning the low-concentration fuel gas is generated on the upper surface of the flame hole member, and a high concentration is generated from the flame hole of the side plate member. In a combustion device in which a flame in which fuel gas burns is generated, the flame hole provided in the side plate member is also provided in a portion corresponding to a side surface side where the area of the flame hole member is small. is there.

In the combustion apparatus of the present invention, the flame holes provided in the side plate member are also provided in a portion corresponding to the side surface side where the area of the flame hole member is small. Therefore, supplementary flame is generated also on the end side of the flame hole member, and the end side of the main flame is held.

Further, the invention according to claim 2 has a double wall constituted by a thin plate, and a fuel gas having a high concentration is introduced into the flame hole and at the same time, a flame hole for injecting the fuel gas having a high concentration from the inside. And two or more side plate members provided with, the overall shape is a long shape and has a flame hole member in which upper and lower surfaces are in communication when placed horizontally and the upper end is a flame hole, The flame hole member is arranged such that two side surfaces having a large area of the flame hole member are sandwiched in a region surrounded by two side plate members, and a fuel gas having a low concentration is formed in a region surrounded by the two side plate members. Is introduced to inject a low-concentration fuel gas from the flame hole of the flame hole member, and a flame in which the low-concentration fuel gas burns is generated on the upper surface of the flame hole member, and a high concentration is generated from the flame hole of the side plate member. In a combustion device that produces a flame that burns fuel gas, In the flame hole member, the width of the end portion is narrower than that of the middle portion, and the gap between the side plate members at the portion corresponding to the end portion of the flame hole member is narrower than that at the portion corresponding to the middle portion of the flame hole member. The combustion device is characterized in that a flame hole is provided in a portion of the side plate member corresponding to the end portion of the flame hole member.

In the combustion apparatus according to the present invention, the width of the end portion of the flame hole member is narrower than that of the middle portion, and the gap between the side plate members at the portion corresponding to the end portion of the flame hole member is in the middle of the flame hole member. The flame hole is narrower than the portion corresponding to the portion, and the flame hole is provided in the portion corresponding to the flame hole member end portion of the side plate member. In the combustion apparatus of the present invention, the width of the end portion of the flame hole member is narrower than that of the middle portion, so that the portion substantially corresponds to the side surface portion of the portion where the main flame is generated. In the combustion apparatus of the present invention, since the flame hole is provided at a portion corresponding to the flame hole member end portion of the side plate member, the flame hole is substantially present on the end portion side, and the supplementary flame is added on the end portion side of the main flame. Occurs.

The above-mentioned problems are constituted by a thin plate.
It has a double wall that is filled with high concentration fuel gas.
Injects high-concentration fuel gas as it is introduced
With two or more side plate members with flame holes, the overall shape is long.
Is vertical and is positioned vertically when placed horizontally
Has a flame hole member whose upper surface becomes a flame hole,
The member is the flame hole in the area surrounded by the two side plate members.
Arranged with the two sides with large area of the member sandwiched
Of the concentration in the area surrounded by the two side plate members.
Low fuel gas is introduced and the concentration is low from the flame hole of the flame hole member.
Fuel gas is injected, and fuel with a low concentration is
A flame that burns gas is generated, and a rich flame comes out
For combustion devices that generate flames that burn high-grade fuel gas
At the site corresponding to the vicinity of the end of the flame hole member of the side plate member,
Is provided with a hole opening between the side plate members.
Can also be solved by a combustion device characterized by
You can

The above-mentioned combustion apparatus is a flame hole member of a side plate member.
Go between the side plate members at the site near the edges.
Is provided with a hole that opens. Therefore, a high concentration of fuel
The raw gas is injected from this hole between the side plate members.
Be done. Therefore, the fuel gas with high concentration is
Combustion occurs in the vicinity, and supplementary flame occurs at the site. as a result,
In the above-mentioned combustion device, auxiliary flame is generated on the end side of the main flame.
However, the main flame is surrounded by the supplementary flame.

Further, by improving the above-mentioned combustion device,
Groove or notch near the end of the flame hole member.
The position of the groove or notch is the position of the side plate member.
It should be approximately aligned with the holes that open between the side plate members.
Removing and child and those characterized by is also possible.

In the combustion device having the above structure, the flame hole member
A groove or notch is formed near the end, and the groove
Or, the position of the cutout is between the side plate members of the side plate members.
It almost coincides with the hole that opens toward. Therefore, the side plate member
The dense fuel gas injected through the holes in the
It runs in the notch and burns at the relevant part to connect the side plate members to each other.
Inflammation occurs.

Still further, the above-mentioned combustion apparatus is a flame hole member.
Is made up of strip-shaped partition plates stacked on top of each other.
A notch is provided, and the notches are lined up in series to form a groove.
Is characterized by forming a notch.
You can

In the combustion apparatus having the above structure, the flame holes are
The members are constructed by stacking strip-shaped partition plates.
It And in the flame hole member adopted in the above-mentioned combustion device,
Each partition plate has a notch, and the notch is a series.
There is one groove or notch that overlaps with.

[0018]

Embodiments of the present invention will be further described below. In the following description, the upper and lower sides are based on the state in which the combustion device 1 is installed with the flame holes facing upward. Figure 1
FIG. 1 is a perspective view of a combustion device according to an embodiment of the present invention. Figure 2
FIG. 2 is an exploded perspective view of the combustion device of FIG. 1. FIG. 3 shows FIG.
FIG. 3 is an exploded perspective view of a main part of the combustion device of FIG. FIG. 4 is a perspective view of an end portion of the flame hole member. FIG. 5 is a partial plan view of the combustion device of FIG. FIG. 6 is a sectional view taken along line AA of FIG.
FIG. 7 is a cross-sectional view of the upper end of the combustion device of FIG. 1 at the longitudinal end. FIG. 8: is explanatory drawing which shows the flame distribution of the combustion apparatus of this embodiment.

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

The combustion tube body 2 used in this embodiment has a fuel gas introduction hole 14 as shown in FIG. 1 at the lower corner, which is similar to a known one, and the inside thereof has a gradually increasing cross-sectional area. Further, the flow path is changed in direction to form the mixing section 11. Large and small holes 16 and 17 are provided on the upper side surface of the combustion tube body 2.

The side plate member 3 is made by pressing a thin steel plate and then bending it. As shown in FIGS. 6 and 7, the inner plate 23 and the outer plate 25 are arranged with a gap therebetween. It has a narrow top portion 34, and the other periphery is folded back so that gas does not leak. The space between the inner surface plate 23 and the outer surface plate 25 forms a closed space inside the side plate member 3. That is, the side plate member 3 has a double wall structure of the inner plate 23 and the outer plate 25, and the inside is hollow. In addition, a hole 31 for introducing the concentrated mixed gas is provided in the center of the side plate member 3.

The inner surface plate 23 and the outer surface plate 25 of the side plate member 3 are
In all cases, the overall shape is concave. More specifically,
As shown in FIG. 3, the side plate member 3 has a relatively deep recess in the central portion 26 occupying most of its area, and a slightly shallow recess in the end horizontal portion 27. Flange portions 19 are provided at both ends in the longitudinal direction. The amount of depression of most of the central portion 26 described above is half the width of the central portion of the flame hole member 5. Further, the amount of depression of the horizontal portion 27 at the end portion is half the width of the end portion 32 of the flame hole member 5.

The top portion 34 of the side plate member 3 is provided with a rich gas flame hole 35 for generating supplementary flame. In the side plate member 3 of this embodiment, the rich gas flame holes 35 are slit-shaped. The rich gas flame holes 35 are provided in the entire area of the top portion 34 of the side plate member 3 (excluding the flange portion 19). More specifically,
The rich gas flame holes 35 are continuously provided in the central portion 26, the inner vertical portion 28 following the central portion 26, the horizontal portion 27 subsequent thereto, and the outer vertical portion 29 subsequent thereto.

A hole 15 is provided in the vertical wall 31 of the horizontal portion 27 of the end portion 34. The hole 15 is located in the vicinity of the upper end of the vertical wall 31 of the horizontal portion 27 and opens toward the inside. Since the two side plate members 3 are joined face to face, the holes 15 formed in the side plate member 3
Will open toward the other side plate member. The holes 15 are provided at both ends of each side plate member 3, so that the combustion device 1 as a whole is provided with four holes 15.

Next, the flame hole member 5 will be described. The flame hole member 5 used in the combustion device 1 of the present embodiment has a quadrangular prism shape as shown in FIG. 2 and has an elongated shape. Further, the flame hole member 5 has a wide central portion as shown in FIGS.
2 is narrow (for the convenience of drawing, FIG. 2 is drawn with the same width in all parts). A notch 33 is provided on the upper surface of the end 32 of the flame hole member 5. Cutout 33
The shape is like that the corner portion of the flame hole member 5 is cut off, and the upper surface side and the side surface side of the end portion 32 are open. The notch 33 extends over the entire area of the flame hole member 5 in the width direction. The shape of the notch does not necessarily have to be a shape with a corner portion cut off, and for example, the flame hole member 5
The shape may be opened only on the upper surface side of.

Specifically, the flame hole member 5 is formed by stacking six strip-shaped partition plates 20a to 20f as shown in FIG. That is, the flame hole member 5 has a left first partition plate 20a and a right first partition plate 20f on the outermost side, and a left second partition plate 20b, a right second partition plate 20e, and a left third partition plate 20c inside thereof. , The right third partition plate 20d. And notches are provided at respective end portions of the respective partition plates 20a to 20d, and when the respective partition plates 20a to 20d are stacked, the notches of the respective partition plates 20a to 20d are overlapped with each other to form a flame hole. The notch 33 is formed over the entire width of the member 5.

The details of the structure of the flame hole member 5 of this embodiment will be described below in accordance with the manufacturing procedure. When manufacturing the flame hole member 5 of the present embodiment, first, one steel plate is pressed to form a spread plate. The notches of the partition plates 20a to 20d described above are provided at the stage of pressing. The developed shape is such that the six partition plates 20a to 20f are connected by the connecting portions 30 (FIG. 4) having extremely thin widths. Each of the partition plates 20a to 20f is embossed, and the whole is corrugated in an uneven shape.

The flame hole member 5 is formed by folding the connecting portions 30 as shown in FIG. 4 to sequentially fold the partition plates 20a to 20f alternately. The connection portion 30 is located at a portion where the convex surfaces are in contact with each other, is bent, and has a “U” shape. In the folded state, each partition plate 20a-
In 20f, a gap penetrating in the width direction is formed by the embossed unevenness, and the gap serves as a gas flow path.

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

When the combustion tube body 2 and the side plate member 3 are combined with each other, the hole 16 of the combustion tube body 2 is aligned with the hole 31 (FIG. 2) provided in the central portion of the side plate member 3, and 2 and the side plate member 3 communicate with each other.

The flame hole member 5 is a space sandwiched between the inner surface plates 23 of the side plate member 3, and is arranged at a position slightly apart from the top 24 of the combustion tube body 2. That is, in the flame hole member 5, the side surface having the largest area is held by the central portion 26 of the inner surface plate 23 of the side plate member 3. Also, the flame hole member 5
The end portion 32, that is, the portion having a narrow width is held by the horizontal portion 27 at the end portion of the side plate member 3. When the flame hole member 5 is arranged at a regular position between the side plate members 3, the hole 15 provided in the side plate member 3 communicates with the notch 33 of the flame hole member 5. That is, the notch 3 of the flame hole member 5
3 is disposed at a regular position between the side plate members 3,
It is located at a position slightly lower than the top surface of the side plate member 3, and coincides with the hole 15 provided in the side plate member 3.

In the combustion apparatus 1 of this 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 entering from the lower opening 18 to become a light mixed gas. Rise to. Then, the light mixed gas is injected into the outside air through the gap of the flame hole member 5 to generate a main flame.

Further, the rich mixed gas is introduced from the combustion tube body 2 into the side plate member 3 through the holes 16 and 31. Then, the rich mixed gas is injected from the rich gas flame hole 35 provided on the top surface of the side plate member 3 and burns to generate supplementary flame. Here, in the combustion device 1 of the present embodiment, the side surface having the largest area of the flame hole member 5 is held by the central portion of the inner surface plate 23 of the side plate member 3, and the end portion 32 of the flame hole member 5 is the side plate member. It is held by a horizontal section 27 at the end of 3, and the flame hole 35 further comprises a central majority section 26, followed by an inner vertical section 28, and a subsequent horizontal section 2.
7. Further, it is continuously provided on the outer vertical portion 29 subsequent thereto. Therefore, in the combustion device 1 of the present embodiment,
Concentrated gas flame holes 35 of one side plate member 3 surrounds the burner port member 5 to shape the "U". Further, since the side plate members 3 are arranged facing each other, the rich gas flame holes 35 are connected in a substantially annular shape except for the flange portion of the side plate member 3l, and substantially the entire circumference of the flame hole member 5 is covered. Surrounded. Further, the width of the end portion 32 of the flame hole member 5 is made narrower, and the distance between the side plate members 3 at the relevant portion is correspondingly short. In the present embodiment, as described above, the end portion 3 of the flame hole member 5 is
A rich gas flame hole 35 is also provided in a portion corresponding to 2, more specifically in the horizontal portion 27. Therefore, the distance between the rich gas flame holes 35 provided in the horizontal portions 27 of the opposite side plate members 3 is extremely short. Therefore, in the combustion device 1 of the present embodiment, the flame supplemented by the rich gas flame holes 35 surrounds the flame hole member 5 substantially all around.

In addition, in the combustion apparatus 1 of this embodiment, the rich mixed gas is injected from the hole 15 provided in the side plate member 3. Since the hole 15 provided in the side plate member 3 communicates with the cutout 33 of the flame hole member 5, the rich mixed gas injected from the hole 15 is not cut into the cutout 33 of the flame hole member 5 as shown in FIG. 7. It runs in the notch 33 and burns in the notch 33 to generate supplementary flame. Therefore, in the combustion apparatus 1 of the present embodiment, the point that the rich gas flame hole 35 substantially surrounds the entire circumference of the flame hole member 5 and the supplementary flame by the rich mixed gas that runs in the notch 33 are combined. As shown in FIG. 8, the entire circumference of the main flame 60 is surrounded by the auxiliary flame 61. Therefore, in the combustion device 1 of the present embodiment, the holding of the main flame 60 is reliable,
The main flame 60 is extremely stable.

Next, another embodiment of the present invention will be described. The same parts as those in the previous embodiment are designated by the same reference numerals, and a duplicate description will be omitted. FIG. 9 is an exploded perspective view of a main part of a combustion device according to another embodiment of the present invention. FIG. 10 is an exploded view of the flame hole member used in the embodiment of FIG. 11 is a cross-sectional view of the upper end of the combustion device of the embodiment of the combustion device of FIG. 9 in the longitudinal direction. The combustion device 40 of the present embodiment is provided with the connecting portion 30 of the flame hole member 45.
Is an example in the case of providing near the end of the flame hole member 45. That is, in the previous embodiment, the strip-shaped partition plate 20 is adopted as the configuration of the flame hole member 5. Flame hole member 5 of this configuration
Is manufactured by bending the parts connected to each other via the connecting portion 30, and therefore has an advantage that the partition plates are not combined in the wrong order and the assembly is easy. However, on the other hand, since the connecting portion 30 is located on the upper surface side of the flame hole member 5, there is a drawback that the main flame is divided. Therefore, it is desirable to provide the connecting portion 30 at a site that does not affect the main flame, and in that sense, it is recommended that the connecting portion 30 be provided at the end of the partition plate. However, if the connecting portion 30 is provided at the end of the partition plate 20, a new problem arises in that a groove or the like cannot be provided at the end of the flame hole member 5. The present embodiment addresses this problem and solves the problem by providing a notch or opening that leaves the upper part of the partition plate and providing a connecting part on the remaining part.

The flame hole member 45 employed in this embodiment has six partition plates 50a to 50f as in the previous embodiment. The connecting portion 30 that connects the partition plates 50 is located at the end of the partition plate 50. Further, among these, the outermost first partition plates 50a and 50f and the connecting portion 30 that connects the second partition plates 50b and 50e adjacent thereto are located above the flame hole member 45.

In the flame hole member 45 adopted in this embodiment,
The first partition plates 50a and 50f and the second partition plates 50b and 50e adjacent to the first partition plates 50a and 50f are provided with notches 53 that leave the upper side 52. That is, the notch 53
Is to open toward the end portion in the longitudinal direction, and the upper portion is connected to another portion. Instead of the cutout 53,
You may employ | adopt the opening (hole) which does not have any open end. Then, between the partition plates 50a and 50b and between the partition plates 50
The connecting portion 30 is provided on the remaining upper side 52 between f and 50e.

The two partition plates 50c in the central portion,
The d is provided with a notch 55 whose upper portion and side portions are open. In the combustion device 1 of the present embodiment, the hole 15 provided in the side plate member 3 communicates with the notch 53 of the first partition plates 50a and 50f, and the rich mixed gas injected from the hole 15 is the first partition plate. 50a, 50f and second partition plate 50
It goes under the upper side 52 of b and 50e and the connection part 30, and reaches the inner partition plates 50c and 50d. Partition plate 5 in the center here
The upper portion of the notch 55 provided at 0c and 0d is open. Therefore, the rich mixed gas blows upward from the notch 55 and burns to generate supplementary flame. Therefore, also in the combustion device 40 of the present embodiment, the point that the rich gas flame hole 35 substantially surrounds the entire circumference of the flame hole member 5 and the supplementary flame generated from the notch 55 are combined, 8, the entire circumference of the main flame 60 is surrounded by the auxiliary flame 61. Therefore, in the combustion device according to the present embodiment, the main flame 60 is reliably held, and the main flame 60 is extremely stable.

In this embodiment, as described above, the flame hole member is formed by connecting strip-shaped partition plates to each other through a narrow connecting portion, and bending the connecting portion to stack the partition plates. The connection portion is near the end portion, and a notch or an opening leaving the upper portion is provided on any of the partition plates, and the connection portion is provided on the remaining upper portion. The present invention is not limited to this configuration. Further, similarly, in the present embodiment, a connection portion is provided on an upper portion of the outermost partition plate, and a cutout or an opening that leaves the upper portion is provided on the outer partition plate. At least one of the structures has a notch with an opening at the top, but this structure is not essential.

[0040]

As has been described above, in the combustion apparatus according to claim 1, the burner port provided in the side plate member, is also provided at a site area of the burner port member corresponds to a smaller side surface . Therefore, supplementary flame is generated also on the end side of the flame hole member, and the end side of the main flame is held.

Further, in the combustion apparatus according to the second aspect , the width of the end portion of the flame hole member is narrower than that of the middle portion, and the flame hole is provided at a portion corresponding to the end portion of the flame hole member of the side plate member. Therefore, the structure is substantially the same as that having a flame hole on the end side, and the main flame is held securely.

[Brief description of 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.

3 is an exploded perspective view of a main part of the combustion apparatus of FIG.

FIG. 4 is a perspective view of an end portion of a flame hole member.

5 is a partial plan view of the combustion device of FIG.

6 is a cross-sectional view taken along the line AA of FIG.

7 is a cross-sectional view of the upper end of the combustion device of FIG. 1 in the longitudinal direction.

FIG. 8 is an explanatory diagram showing a flame distribution of the combustion device of the present embodiment.

FIG. 9 is an exploded perspective view of a main part of a combustion device according to another embodiment of the present invention.

FIG. 10 is an exploded view of the flame hole member used in the embodiment of FIG.

FIG. 11 is a cross-sectional view of the upper end of the combustion device of the embodiment of the combustion device of FIG. 9 at the longitudinal end.

FIG. 12 is a partial plan view of a prior art combustion device.

FIG. 13 is an explanatory diagram showing a flame distribution of a conventional combustion device.

[Explanation of symbols]

1,40 Combustion device 2 Combustion tube body 3 side plate members 5,45 Flame hole member 15 holes 20a-20f partition plate 23 Inner Plate 25 outer plate 30 connections 33 cutout 35 Rich gas flame hole 50a-50f partition plate 52 Upper side 53 cutouts 55 cutout 60 main flame 61 Flame remediation

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Kameyama 93 Edo-machi, Chuo-ku, Kobe-shi, Hyogo Within Noritsu Co., Ltd. (72) Inventor Ryoji Sena 93 Edo-cho, Chuo-ku, Kobe, Hyogo Inside Noritsu Co. 72) Inventor Hidenori Hata, 93, Edo-machi, Chuo-ku, Kobe-shi, Hyogo Within Noritsu Co., Ltd. (72) Inventor, Yasushi Yamazaki, 93, Edo-cho, Chuo-ku, Kobe-shi, Hyogo (56) Reference JP 9 -210322 (JP, A) JP 7-103420 (JP, A) JP 7-151316 (JP, A) JP 7-190318 (JP, A) JP 6-147432 (JP, A) ) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23D 14/02 F23D 14/08 F23C 11/00 329-330

Claims (2)

(57) [Claims] 1. Having a double wall constituted by a thin plate,
Two or more side plate members in which a high-concentration fuel gas is introduced and flame holes for injecting a high-concentration fuel gas from the inside are provided, and the overall shape is a long shape and placed horizontally. In the state, the upper and lower surfaces communicate with each other, and the upper end has a flame hole member having a flame hole, and the flame hole member has two side surfaces having a large area of the flame hole member in a portion surrounded by two side plate members. The fuel gas having a low concentration is introduced into a region surrounded by the two side plate members, and the fuel gas having a low concentration is injected from the flame hole of the flame hole member, and the upper surface of the flame hole member is disposed. In the combustion device, a flame in which a low-concentration fuel gas burns is generated, and a flame in which a high-concentration fuel gas burns is generated from a flame hole in the side plate member. The area of the member is also small Combustion apparatus characterized by being. 2. It has a double wall constituted by a thin plate,
Two or more side plate members in which a high-concentration fuel gas is introduced and flame holes for injecting a high-concentration fuel gas from the inside are provided, and the overall shape is a long shape and placed horizontally. In the state, the upper and lower surfaces communicate with each other and the upper end has a flame hole member having a flame hole, and the flame hole member has two side surfaces with a large area of the flame hole member in a portion surrounded by two side plate members. The fuel gas having a low concentration is introduced into a region surrounded by the two side plate members, and the fuel gas having a low concentration is injected from the flame hole of the flame hole member, and the upper surface of the flame hole member is disposed. In the combustion device, a flame in which a low-concentration fuel gas is burned is generated, and a flame in which a high-concentration fuel gas is burned is generated from a flame hole of the side plate member. Side narrower than the area and corresponding to the end of the flame hole member The gap between the members is narrower than the portion corresponding to the burner port member intermediate portion, a combustion apparatus characterized by the burner port is provided in a portion corresponding to the burner port member end of the side plate member.