JP2002349813A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide mixed gas quantitatively equally over the whole on an elongate burner port in a direction perpendicular to the elongate burner port. SOLUTION: This combustion device is provided with a fuel-air introduction opening 23, a mixing passage 24, burner forming bodies 20a and 20b forming an ejective burner port part 26, a small burner-port forming group 29 comprising a plurality of zonal plates 27 dividing the ejective burner port part 26 into a plurality of burner-port passages 30 and small burner ports 31 communicating with the burner-port passages 30 and located on the downstream side of the burner-port passages 30, and provided with a flow-direction adjusting means 32 at least one point on the upstream side of the small burner-port forming group 29. Such combustion device is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a household or commercial combustion apparatus, and more particularly to a combustion apparatus which provides a quantitatively uniform mixture to achieve stable combustion.

[0002]

2. Description of the Related Art Heretofore, as this type of combustion apparatus, there has been one described in, for example, Japanese Patent Application Laid-Open No. 7-243617. FIG. 14 shows a conventional gas burner described in the above publication. In FIG. 14, 1 is a gas burner, 2 is a metal plate forming the gas burner 1, 3 is a gas introduction passage formed by press-molding the metal plate 2, 4 is a passage recess of the gas introduction passage 3, 5 is a passage recess 4 5a is the inlet side of the rectifying recess 5 and communicates with the rectifying recess 5;
b is the side of the straightening concave portion 5 where the introduction passage is bent. Reference numeral 6 denotes a bulge diameter and a bulge depth, which are near the inlet side of the gas introduction passage 3 and are located on the fuel gas introduction axis, and are bulged and formed by press working toward the inside of the passage recess 4. Are both large obstacles. Reference numeral 7 denotes a bent portion of the gas introduction passage 3, reference numeral 8 denotes a plate base surface located between the rectification recesses 5, and reference numeral 9 denotes a premix gas flow guided from the gas introduction passage 3 to the rectification recess 5. Reference numeral 10 denotes a burner flame port communicating with the straightening passage recess 5, and reference numeral 11 denotes a flame formed on the burner flame port.

In the above configuration, the fuel gas ejected from the gas nozzle (not shown) collides with an obstacle 6 provided near the inlet of the gas introduction passage 3 and on the gas ejection axis to disturb the flow and diffuse. Then, the mixing of the diffused fuel gas and the air introduced from the surroundings is promoted, and further diffusion mixing is promoted to reach the rectification passage 5, whereby a premixed gas having a uniform concentration is obtained. The combustion of the gas improves the combustion performance and achieves clean combustion with less generation of NOx, HC and the like.

[0004]

However, in the above-described conventional combustion apparatus, due to the turbulence effect of the obstacle 6 provided near the inlet of the gas introduction passage 3, the mixing property between the fuel gas and the air is improved, and the concentration is uniform. Although the premixed gas can be formed, when the premixed gas passes through the gas introduction passage 3 and is guided to the rectification passage recess 5, the flow direction of the premixed gas at the bent portion 7 of the gas introduction passage 3 is as described above. The premixed gas flow 9 is changed to the reverse direction having an angle with the gas ejection direction, and the premixed gas flow 9 is introduced into the straightening passage recess 5 not obliquely but perpendicular to the burner flame port 10 as shown in FIG. A premixed gas easily flows on the gas introduction passage inlet side 5a, and a stagnation area is easily formed by the plate base surface 8 on the opposite side of the introduction passage bent portion 5b. The straightening passage recess 5 works so that the premixed gas flow direction is directed to a direction perpendicular to the burner flame port 10.
When the burner is downsized, the flow direction length of the flow straightening recess 5 is limited, so that the flow direction straightening effect by the flow straightening is limited. As a result, the burner flame 1
The mixed gas ejected to zero is uneven in distribution quantitatively, and since the ejection direction is not perpendicular to the burner flame port 10, the flame 11 to be formed has a problem of being unevenly distributed to the fuel gas introduction passage inlet side 5a. Was.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a burner forming body forming a fuel air inlet, a mixing passage, and a burner ejection flame opening, and the burner ejection flame opening. A small flame port forming group composed of a plurality of strip-shaped plates that divides the flame into a plurality of elongated flame port passages, and an elongated small flame port located downstream of the flame port passage, and the flow of the mixed gas in the flame port passage A combustion device provided with at least one flow direction adjusting means on the upstream side of the small flame opening forming group in order to adjust the direction of the small flame opening to a direction substantially perpendicular to the small flame opening.

In the above-mentioned combustion apparatus, by providing a flow direction adjusting means on the upstream side of the small flame opening forming group, the burner elongated small flame opening introduced from the mixing passage is provided on the upstream side of the small flame opening forming group with the oblique angle. The premixed gas flow is calibrated in the direction perpendicular to the direction of the elongated small flame outlet, and is ejected from the burner emission flame opening. Can be supplied at Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the flame outlet, thereby improving the combustion performance,
Clean combustion with little generation of NOx and HC can be achieved.

[0007]

A combustion apparatus according to a first aspect of the present invention includes a burner forming body that forms a fuel air inlet, a mixing passage, and a burner ejection flame port, and a plurality of elongated flame port passages that connect the burner ejection flame port. A small flame port forming group consisting of a plurality of band-shaped plates divided into a small flame port and an elongated small flame port located on the downstream side of the flame port passage, and the direction of the flow of the mixed gas in the flame port passage is defined as a small flame port. At least one flow direction adjusting means is provided on the upstream side of the small flame opening forming group in order to adjust the flow direction in a substantially vertical direction.

As described above, by providing the flow direction adjusting means on the upstream side of the small flame opening forming group, the oblique angle with the elongated burner small flame opening introduced from the mixing passage is provided on the upstream side of the small flame opening forming group. The premixed gas flow is calibrated in the direction perpendicular to the direction of the elongated small flame outlet, and is ejected from the burner ejection flame outlet. Can be supplied. Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the entire flame mouth, thereby improving the combustion performance and reducing NOx, HC
Clean combustion with less generation such as can be achieved.

According to a second aspect of the present invention, there is provided a combustion apparatus which includes a burner forming body for forming a fuel air inlet, a mixing passage, and a burner ejection flame port, and a plurality of the burner ejection flame ports divided into a plurality of elongated flame port passages. A small flame port forming group consisting of a band-shaped plate, and an elongated small flame port located downstream of the flame port passage, wherein the flow direction of the mixed gas in the flame port passage is substantially perpendicular to the small flame port. In order to adjust the direction, as a flow direction adjusting means, the strip-shaped plate is brought into close contact with the small flame outlet without reaching the small flame outlet, and a partition portion for dividing the flame passage on the upstream side of the small flame formation group is provided. .

As described above, as the flow direction adjusting means, the band-shaped plate is brought into close contact with the end face on the small flame opening side without reaching the end surface on the small flame opening side, and the partitioning section for dividing the upstream side of the flame opening passage is provided as the flow direction adjusting means. By this, the flame outlet passage on the upstream side of the small flame outlet forming group is finely divided in the elongated direction by the partitioning portion, and the flow direction is adjusted by rectification, and at the same time, the burner elongated small flame inlet introduced from the mixing passage is inclined. The premixed gas flow with an angle hits the partition and is calibrated in a direction perpendicular to the direction of the elongated small flame outlet, and is ejected from the burner emission flame. It can be supplied in a direction perpendicular to the flame outlet. Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the flame outlet,
The combustion performance can be improved, and clean combustion with little generation of NOx, HC and the like can be achieved.

According to a third aspect of the present invention, there is provided a combustion device which includes a burner forming body for forming a fuel air inlet, a mixing passage, and a burner ejection flame opening, and a plurality of the burner ejection flame opening divided into a plurality of elongated flame passages. A small flame port forming group consisting of a band-shaped plate, and an elongated small flame port located downstream of the flame port passage, wherein the flow direction of the mixed gas in the flame port passage is substantially perpendicular to the small flame port. As a flow direction adjusting means on the upstream side of the small flame opening forming group to adjust the direction, a part of the upstream side of one band plate located outside the small flame opening forming group is substantially the same as the band plate. A notch is provided at a position corresponding to a bent claw that is a bent portion of the bent band-shaped plate on a band-shaped plate other than the bent band-shaped plate, and the bent claw is inserted into the notch. The flame outlet passage upstream of the small flame outlet forming group. Has a configuration that separates.

As described above, as a flow direction adjusting means on the upstream side of the small flame opening forming group, the height of the bending nail is provided on the upstream side of one band-shaped plate located outside the small flame opening forming group. The other band-shaped plate has a notch at a position corresponding to the bent nail, and the bent nail is inserted into the notch to separate the flame passage, whereby the flame passage on the upstream side of the small flame formation group is formed. It is finely divided by the bending nail in the elongated direction, and the flow direction is adjusted by rectification.At the same time, the premixed gas flow having an oblique angle with the elongated narrow flame outlet introduced from the mixing passage hits the bending nail, and the elongated flame opening Since it is calibrated in the direction perpendicular to the direction and is ejected from the burner ejection flame port, it can be supplied quantitatively and evenly in the direction perpendicular to the flame port over the entire burner ejection flame port. Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the entire flame mouth, thereby improving combustion performance and achieving clean combustion with less generation of NOx, HC and the like.

According to a fourth aspect of the present invention, there is provided a combustion apparatus comprising: a burner forming body forming a fuel air inlet, a mixing passage, and a burner ejection flame opening; and a plurality of the burner ejection flame opening divided into a plurality of elongated flame opening passages. A small flame port forming group consisting of a band-shaped plate, and an elongated small flame port located downstream of the flame port passage, wherein the flow direction of the mixed gas in the flame port passage is substantially perpendicular to the small flame port. As a flow direction adjusting means on the upstream side of the small flame opening forming group to adjust the direction, it is inserted in the flame passage on the upstream side of the small flame opening forming group, so that the upstream side of the small flame opening forming group Is provided with a partitioning part for partitioning the flame passage.

As described above, as a flow direction adjusting means on the upstream side of the small flame opening forming group, the separating part is inserted on the upstream side of the flame opening passage of the small flame opening forming group, so that the upstream side of the small flame opening forming group is formed. The flame passage is divided finely by the separating part in the elongated direction, and the flow direction is adjusted by rectification.At the same time, the premixed gas flow with an oblique angle with the burner elongated small flame inlet introduced from the mixing passage is divided into the separating part. Collision, calibrated in the direction perpendicular to the elongated flame opening direction, and ejected from the burner ejection flame opening, it is possible to quantitatively and evenly supply the burner ejection flame in the direction perpendicular to the flame opening throughout the burner ejection flame opening. .
Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the entire flame mouth, thereby improving combustion performance and achieving clean combustion with less generation of NOx, HC and the like.

According to a fifth aspect of the present invention, there is provided a combustion apparatus comprising: a burner forming body that forms a fuel air inlet, a mixing passage, and a burner ejection flame port; and a plurality of the burner ejection flame port divided into a plurality of elongated flame port passages. A small flame port forming group composed of a band-shaped plate and an elongated small flame port located on the downstream side of the flame port passage, wherein the small flame port is divided into a plurality of flame port blocks in the elongated direction. Then, at least one flow direction adjusting means is provided upstream of the small flame port forming group in order to adjust the flow direction of the mixed gas in the flame port passage in a direction substantially perpendicular to the small flame port. Has become.

As described above, by providing the flow direction adjusting means on the upstream side of the small-flame-portion forming group, the oblique angle between the elongated small burner port introduced from the mixing passage and the oblique angle is provided on the upstream side of the small-flame-portion forming group. The premixed gas flow is calibrated in the direction perpendicular to the direction of the elongated small flame outlet, and is ejected from the burner ejection flame outlet. Can be supplied. Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the entire flame mouth, thereby improving the combustion performance and reducing NOx, HC
Clean combustion with less generation such as can be achieved.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view of a burner forming body and a small flame opening forming group in Embodiment 1 of the present invention, and FIG.
3 is an assembled perspective view of a burner forming body and a small flame opening forming group shown in FIG. 3A. FIG. 3A is a side view of the small flame opening forming group, and FIG. 3B is a side view of the burner body. 4A is a cross-sectional view taken along line AA of the small flame opening forming group shown in FIG. 3, and FIG. 4B is a cross-sectional view taken along line BB of FIG.

1 and 2, reference numerals 20a and 20b denote burner forming bodies formed by sheet metal swelling, and reference numerals 20a and 20b denote mirror symmetry with the sheet metal plate base surface 21 as a plane of symmetry. The burner body 22 is formed by welding. 23 is a fuel air inlet formed by sheet metal swelling; 24 is a mixing passage communicating with the fuel air inlet 23;
5 is a mixing passage bent portion, 26 is a burner ejection flame opening portion communicating with the mixing passage bent portion 25, 27 is a band-shaped plate, and 28 is a band-shaped plate 2.
The gap forming means 7, 29 is an elongated small flame opening forming group constituted by a plurality of band-shaped plates 27 having the gap forming means 28. The small flame outlet forming group 29 is inserted into the burner discharge flame outlet 26, and divides the burner discharge flame outlet 26 into a plurality of elongated flame passages 30. Reference numeral 31 denotes an elongated small flame outlet which communicates with the flame passage 30 and is located downstream of the flame passage 30. Numeral 32 denotes a partitioning portion which is a flow direction adjusting means for bringing the band-shaped plate 27 into close contact with the end face on the side of the small flame port 31 and dividing the upstream side of the flame port passage 30.

The elongated small flame opening forming group 29 is formed by the gap forming means 28 in the same elongated direction as the flame opening block A,
B1, B2, C1, C divided into B, C, D
2, D1 and D2 are flow path blocks divided by the flow direction adjusting means 32 on the upstream side of the flame port blocks B, C and D, respectively. The small flame outlet forming group 29 includes the burner forming body 20
It is configured to be fixed by the throttle unit 33 provided in each of a and 20b. Reference numeral 34 denotes a burner first resistance path formed by sheet metal bulging communicating with the burner ejection flame port 26, 35 denotes a burner second resistance path formed by sheet metal bulging communicating with the burner ejection flame port 26, Reference numeral 36 denotes a burner groove passage formed by sheet metal swelling communicating with the burner ejection flame port 26, and the mixed gas has the same amount of mixed gas introduced into each of the flame port blocks A, B, C, and D on average. As described above, the shapes and passage resistances of the passages 34, 35, and 36 are devised. Reference numeral 37 denotes a throttle portion provided on the burner forming bodies 20a and 20b, which corresponds to the position and shape of the flow direction adjusting means of the small flame opening forming group 29, and is arranged so as to be in close contact with the flow direction adjusting means.

In FIG. 3, (a) shows a small flame opening group 2
9, (b) shows a side view of the burner body 22,
In the figure, in each of the flame outlet blocks A, B, C, and D,
The portion of the small flame opening 31 on the side of the mixing passage bent portion 25 is referred to as 31a, and the portion of the small flame opening 31 on the side of the fuel air inlet 23 is referred to as 31b. 3
8 indicates the flow direction of the mixed gas that has not reached the bent portion 25 in the burner body 22, and 39 and 40 indicate the flow directions of the mixed gas after passing through the bent portion 25. 4, (a) is a cross-sectional view taken along line AA shown in FIG. 3, and (b) is a cross-sectional view taken along line BB shown in FIG. 3. In the drawing, reference numeral 41a denotes flow path blocks B1, C1. , D1 and 4
1b is a flame port passage corresponding to the flow path blocks B2, C2, D2.

The operation and operation of the combustion apparatus configured as described above will be described below. Fuel gas and air are introduced from the fuel air inlet 23 into the burner body 22, and are mixed with the fuel while passing through the mixing passage 24 and the bent portion 25. After the mixed gas has passed through the bent portion 25, the mixed gas flow reverses the direction of the flow 38 that has not reached the bent portion 25, as shown in FIG. And with an oblique angle. The mixed gas introduced into the flame port block A closest to the bent portion 25 can be jetted in a direction substantially perpendicular to the elongated burner jet port 26, but is separated from the bent portion 25 and located on the fuel air inlet port 23 side. The mixed gas flow introduced into B, C, and D has the above-mentioned oblique angle until it reaches the upstream side of the small flame opening forming group 29.

As shown in FIG. 3 and FIG.
On the upstream side of 9, flow path blocks B1, B2, C1, C2, D1, D
It is finely divided into two. The mixed gas flow having the above-mentioned oblique angle flowing from the upstream side of the small flame opening forming group 29 is divided into flow blocks B1, B2, C1, C2, D1, and D.
2, the small flame outlet 31 on the side of the mixing passage bending portion 25
It is easy to flow to a. Further, a partition 32 in which a part of the mixed gas is disposed in a direction perpendicular to the elongated small flame outlet 31.
Flow channel block B
It flows to 1, C1, D1 and is calibrated in the direction perpendicular to the elongated small flame opening 31.

As described above, the mixed gas having the above oblique angle is calibrated in the direction perpendicular to the direction of the flame opening under the influence of the partitioning portion 32 as the flow direction adjusting means, and the small flame on the mixing passage bent portion 25 side without stagnation area. Port 31a and small flame port 3 on fuel air inlet port 23 side
1b, the mixed gas can be supplied quantitatively and uniformly over the entire burner jetting flame port 26 without stagnation in the direction perpendicular to the flame port. Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the entire flame mouth, thereby improving combustion performance and achieving clean combustion with less generation of NOx, HC and the like.

A burner that stabilizes combustion and reduces combustion noise by dividing a burner flame into a plurality of small flames by a plurality of band-shaped metal plates is used. According to the configuration of the present invention, by providing the flow direction adjusting means 32 in the small flame port forming group without newly adding a component, the mixed gas can be uniformly ejected in a direction perpendicular to the flame port. It can be realized easily and at low cost.

In the present invention, the flow direction adjusting means 32 is provided on the upstream side of the small flame port forming group 29. For example, the flame port passage 41a and the flow block B2 of the divided flow block B1 are provided.
The mixed gas introduced into the flame passage 41b of the
At the downstream of the nozzle, the jet is blown out from the burner block B, so that the mixed gas flow direction can be calibrated without increasing the burner burner load, and the mixed gas is blown out uniformly in the direction perpendicular to the burner. be able to. Further, since the partitioning portion 32 serving as the flow direction adjusting means plays a role of calibrating the flow direction without reducing the area of the main flow path of the mixed gas flow, the pressure loss of the burner hardly changes. These features of the invention are preferred in practice.

Although there are three partitioning portions 32 which are flow direction adjusting means of the present invention in the direction perpendicular to the elongated small flame opening 31 of the jetting flame opening portion 26, the partitioning portion 32 is provided upstream of the small flame opening forming group 29. In consideration of the local mixed gas flow angle on the
By adjusting the number, length, angle with the elongated small flame opening 31, arrangement position, and the like, further better effects can be obtained.

In the present embodiment, the partitioning portion 32 which is a flow direction adjusting means is provided on the upstream side of the small flame opening forming group 29, but on the small flame opening 31 side which is the downstream side of the small flame opening forming group 29. The same effect can be obtained by providing the flow adjusting means.

(Embodiment 2) FIG. 5 is a perspective view of a burner forming body and a small flame opening forming group in a second embodiment of the present invention. FIG. 6A is a side view of the small flame opening forming group, and FIG. ) Is a side view of the burner body. 7A is a cross-sectional view taken along line AA of the small flame opening forming group shown in FIG. 6, and FIG. 7B is a cross-sectional view taken along line BB shown in FIG.

The present embodiment is different from the first embodiment in that a small flame outlet forming group 2 is used as a flow direction adjusting means.
9, a strip 42 having a height is provided on the upstream side of one strip 27a, and the other strip 27 has a cutout 43 at a position corresponding to the strip 42. 4
Reference numeral 2 denotes a configuration in which the cutout portion 43 is inserted into the cutout portion 43 to separate the flame passage 30. Note that the partitioning portion 32 serving as the flow direction adjusting means used in the first embodiment is discarded in the present embodiment.

The operation and operation of the combustion apparatus configured as described above will be described below. In the present embodiment, the process of introducing and mixing the fuel gas and the air is the same as that of the first embodiment, and the description thereof will be omitted.

As shown in FIG. 5, FIG. 6 and FIG. 7, on the upstream side of the small flame opening forming group 29, the upstream side of the small flame opening forming group 29 is provided with a flow path by a bending claw 42 which is a flow direction adjusting means. It is divided into blocks B1, B2, C1, C2, D1, and D2. The mixed gas flow having the above-mentioned oblique angle flowing from the upstream side of the small flame port forming group 29 is introduced into the divided flow blocks B1, B2, C1, C2, D1, and D2. It is easy to flow to the small flame outlet 31a. Further, a part of the mixed gas is elongated small flame outlet 31.
, And cannot run straight at the above-mentioned oblique angle, so that the flow path blocks B1, C1, D1
And is calibrated in the direction perpendicular to the elongated small flame outlet 31.

As described above, the mixed gas having an oblique angle is calibrated in the direction perpendicular to the direction of the flame opening under the influence of the bending claw 42 as the flow direction adjusting means, and the small flame opening on the mixing passage bent portion 25 side without a stagnation area. 31a and fuel air inlet 23 side small flame outlet 31
Therefore, the mixed gas can be supplied evenly and quantitatively over the entire burner jetting flame port 26 without stagnation in the direction perpendicular to the flame port. Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the entire flame mouth, thereby improving combustion performance and achieving clean combustion with less generation of NOx, HC and the like.

A burner that stabilizes combustion and reduces combustion noise by dividing a burner flame into a number of small flame formation groups by a plurality of strip-shaped metal plates is used. According to the configuration of the present invention, the small flame opening forming group 29 can be formed without adding a new part.
By providing the bent claw 42 as the flow direction adjusting means, the mixed gas can be uniformly ejected in a direction perpendicular to the flame outlet, so that it can be realized easily and at low cost.

Further, in the present invention, a bent nail 42 as a flow direction adjusting means is provided on the upstream side of the small flame port forming group 29. For example, the flame port passage 41a of the divided flow block B1 and the flame of the flow block B2 are divided. The mixed gas introduced into the mouth passage 41b merges again downstream of the flame passage 30 and is jetted out from the flame block B, so that the mixed gas flow direction can be corrected without increasing the burner flame load, The mixed gas can be jetted uniformly in a direction perpendicular to the flame outlet. Further, since the bent claw 42 serving as the flow direction adjusting means has a function of calibrating the flow direction without reducing the area of the main flow path of the mixed gas flow, the pressure loss of the burner hardly changes. These features of the invention are preferred in practice.

In addition, three bending claws 42, which are flow direction adjusting means of the present invention, are provided in the direction perpendicular to the elongated flame port of the jet flame port portion 26. Considering the local mixed gas flow angle, etc.
By adjusting the number, length, angle with the elongated flame outlet, arrangement position, and the like, a further good effect can be obtained.

In this embodiment, a bent pawl 42 having a height is provided on the upstream side of one band-shaped plate 27a located outside the small flame opening forming group 29, and the other band-shaped plate 27 is provided with a bent pawl 42. The notch 43 is inserted into the notch 43 at a position corresponding to the notch 43. The notch 43 is inserted into the notch 43 so as to divide the flame passage 30. Alternatively, a similar effect can be obtained by inserting a small plate of another part into the notch to separate the flame passage 30.

In this embodiment, a bent nail 42 is provided as a flow direction adjusting means on the upstream side of the small flame opening forming group 29.
The same effect can be obtained by providing the flow control means on the side of the small flame port 31 which is the downstream side of the small flame port forming group 29.

(Embodiment 3) FIG. 8 is a perspective view of a burner forming body, a small flame opening forming group, and a separating part according to a third embodiment of the present invention. FIG. An enlarged view, (b) is an enlarged view of a separation part. In FIG. 10, (a) is a side view of the small flame opening forming group, (b) is a cross-sectional view taken along the line AA shown in (a), and (c) is a cross-sectional view taken along the line BB shown in (a). It is.

The present embodiment differs from the first embodiment in that the flow direction adjusting means is provided with a structure in which the partition member 44 is inserted upstream of the flame passage 30. As shown in FIG. 9, the partitioning member 44 has a protrusion 45 corresponding to the elongated flame port passage 30, and has a comb shape having a gap 46 corresponding to the thickness of the band-shaped plate 27 between the 45. The protrusion 45 is inserted into the flame passage 30, and the base 47 is inserted.
And the place where the belt-shaped plate contacts is fixed by, for example, welding means.
In addition, the partitioning part 32 which is the flow direction adjusting means used in the first embodiment is discarded in the present embodiment.

The operation and operation of the combustion device configured as described above will be described below. In the present embodiment, the process of introducing and mixing the fuel gas and the air is the same as that of the first embodiment, and the description thereof will be omitted.

As shown in FIGS. 8, 9 and 10, on the upstream side of the small flame opening forming group 29, the partitioning member 44 which is a flow direction adjusting means makes the upstream side of the small flame opening forming group 29 a flow path. The blocks are finely divided into blocks B1, B2, C1, C2, D1, and D2. The mixed gas flow having an oblique angle flowing from the upstream side of the small flame opening forming group 29 is introduced into the divided flow blocks B1, B2, C1, C2, D1, and D2. It is easy to flow to the flame outlet 31a. Further, a part of the mixed gas collides with the partitioning member 44 arranged in a direction perpendicular to the elongated small flame outlet 31, and cannot flow straight at an oblique angle, so that the flow path blocks B1, C1,.
It flows to D1 and is calibrated in the direction perpendicular to the elongated small flame outlet 31.

As described above, the mixed gas having an oblique angle is calibrated in a direction perpendicular to the direction of the flame opening under the influence of the partition member 44 which is the flow direction adjusting means, and the small flame opening on the side of the mixing passage bent portion 25 without stagnation area. 31a and small flame outlet 3 on fuel air inlet 23 side
1b, the mixed gas can be supplied quantitatively and uniformly over the entire burner jetting flame port 26 without stagnation in the direction perpendicular to the flame port. Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the entire flame mouth, thereby improving combustion performance and achieving clean combustion with less generation of NOx, HC and the like.

A burner is used in which the burner flame is divided into a plurality of small flame hole forming groups by a plurality of strip-shaped metal plates to stabilize combustion and reduce combustion noise. According to the configuration of the present invention, the separation direction of the mixed gas flow is calibrated in a direction perpendicular to the flame outlet by providing the partitioning member 44 as the flow direction adjusting means in the flame outlet formation group, and at the same time, the flame passage 30 and the small flame outlet are provided. The gap size of 31 can be secured more accurately.

Further, according to the present invention, a partition member 44 as a flow direction adjusting means is provided on the upstream side of the small flame port forming group 29. For example, the flame port passage 41a of the divided flow block B1,
The mixed gas introduced into the flame passage 41b of the flow block B2 joins again downstream of the flame passage 30 and becomes uniform, and is ejected from the flame block B. Therefore, the mixed gas flows without increasing the burner flame load. Can be calibrated, and the mixed gas can be uniformly ejected in a direction perpendicular to the flame outlet. Also,
Since the bent claw 42 serving as the flow direction adjusting means has a function of calibrating the flow direction without reducing the area of the mixed gas flow main passage, the pressure loss of the burner hardly changes. These features of the invention are preferred in practice.

In the meantime, there are provided three separators 44 which are flow direction adjusting means of the present invention in a direction perpendicular to the elongated flame outlet of the jet flame outlet portion 26, but are provided on the upstream side of the small flame outlet forming group 29. Considering the local mixed gas flow angle, etc.,
By adjusting the number, length, angle with the elongated small flame opening 31, arrangement position, and the like, a further good effect can be obtained.

In this embodiment, the separating part 44 as the flow direction adjusting means is provided on the mixing passage side of the small flame port forming group 29, but the flame port which is on the opposite side of the upstream side of the small flame port forming group 29 is provided. The same effect can be obtained by providing a flow control means on the side.

(Embodiment 4) FIG. 11 is a perspective view of a burner forming body and a small flame opening forming group in a fourth embodiment of the present invention. FIG. 12A is a side view of the small flame opening forming group, and FIG. ) Is a side view of the burner body. 13A is a sectional view taken along line AA of the small flame opening forming group shown in FIG. 12, and FIG. 13B is a sectional view taken along line BB shown in FIG.

In the present embodiment, the difference from the configuration of the first embodiment is that
That is, a flame port block dividing means 48 is provided on one side, and a step pushing 49 which is a flow direction adjusting means is provided upstream of the small flame port forming group 29. The flame port block dividing means 48 divides the elongated small flame port 31 into flame port blocks A, B, C, and D in an elongated direction without reaching the end face on the upstream side of the strip-shaped plate 27. The flow direction adjusting means 49 does not reach the end face on the side of the small flame port 31 which is the downstream side of the band-shaped plate 27, and the upstream side of the elongated small flame port forming group 29 extends in the elongated direction in the elongated direction.
It is divided into B, BC, CD and D1. Example 1
Section 32, strip-shaped plate 2 which is the flow direction adjusting means used in
The gap forming means 28 is discarded in this embodiment.

The operation and operation of the combustion apparatus configured as described above will be described below. In the present embodiment, the process of introducing and mixing the fuel gas and the air is the same as that of the first embodiment, and the description thereof will be omitted.

As shown in FIGS. 11, 12 and 13, the mixed gas flow having an oblique angle flowing from the upstream side of the small flame port forming group 29 is divided into divided flow blocks A1, AB and B.
When introduced into C, CD, and D1, it collides with a step push 49 which is a flow direction adjusting means arranged in a direction perpendicular to the elongated small flame opening 31 and cannot flow straight at an oblique angle. , BC, CD and D1. For example, the mixed gas introduced into the flow path block BC collides with the flame port block dividing means 48, and the mixed passage bent portion 25 of the fuel air inlet port 23 side small flame port 31b of the flame port block B and the flame port block C respectively. It branches to the side small flame opening 31a and gushes. As described above, the mixed gas having an oblique angle is calibrated in the direction perpendicular to the flame opening direction by the influence of the step pushing 49 as the flow direction adjusting means, and the small flame opening 31 on the mixing passage bent portion 25 side without stagnation area.
a and the fuel air inlet 23 side small flame port 31b, the mixed gas flows into the burner discharge flame port 26 without stagnation.
It can be supplied evenly and quantitatively in the direction perpendicular to the flame outlet. Therefore, the premixed gas is uniformly ejected in the direction perpendicular to the flame outlet over the entire flame mouth, thereby improving combustion performance and achieving clean combustion with less generation of NOx, HC and the like.

A burner that stabilizes combustion and reduces combustion noise by dividing a burner flame into a number of small flames by a plurality of strip-shaped metal plates is used. According to the configuration of the present invention, by providing the flow direction adjusting means 49 in the small flame outlet forming group without newly adding a component, the mixed gas can be uniformly ejected in a direction perpendicular to the flame outlet, It can be realized easily and at low cost.

Further, according to the present invention, since the flow direction adjusting means 49 is provided on the mixing passage side, which is on the upstream side of the small flame port forming group 29, the flow direction of the mixed gas can be calibrated without increasing the burner flame port load. As a result, the mixed gas can be uniformly ejected in a direction perpendicular to the flame outlet. In addition, the step pushing 49, which is a flow direction adjusting means, serves to calibrate the flow direction without reducing the area of the mixed gas flow main passage, so that the pressure loss of the burner hardly changes. These features of the invention are preferred in practice.

In this embodiment, four step pushes 49, which are flow direction adjusting means, are provided in the direction perpendicular to the elongated flame port of the jet flame port section 26. Considering the local mixed gas flow angle on the
Adjust the number, length and angle of the small flame outlet 31
An even better effect can be obtained.

In each of the examples, the small flame opening group 2
9 is a separate part, but the strip 27 is a burner forming body 20a.
Alternatively, the same effect can be obtained even if the small flame port forming group 29 is formed by being integrated with the ejection flame port section 26 and bent into the jet flame port section 26.

[0056]

As described above, according to the first to fifth aspects of the present invention, in the combustion device, the mixed gas is quantitatively and uniformly distributed over the elongated flame outlet in a direction perpendicular to the elongated flame outlet. And high combustion performance is obtained, and clean combustion with little generation of NOx, HC, etc. can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a burner forming body and a small flame opening forming group in a combustion apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a burner body in the apparatus.

3A is a side view of a small flame opening forming group in the apparatus. FIG. 3B is a side view of a burner body in the apparatus.

FIG. 4A is a sectional view taken along line AA of a small flame opening forming group in the device. FIG. 4B is a sectional view taken along line BB of a small flame opening forming group in the device.

FIG. 5 is a perspective view of a burner forming body and a small flame opening forming group in the combustion apparatus according to the second embodiment of the present invention.

6A is a side view of a small flame opening forming group in the apparatus. FIG. 6B is a side view of a burner body in the apparatus.

FIG. 7A is a cross-sectional view taken along line AA of a small-flame-portion forming group in the same apparatus.

FIG. 8 is a perspective view of a burner forming body and a small flame opening forming group in a combustion apparatus according to a third embodiment of the present invention.

9A is a partially enlarged view of a small flame opening forming group in the apparatus. FIG. 9B is a perspective view of a partitioning part in the apparatus.

10A is a side view of a small flame opening forming group in the same device. FIG. 10B is a cross-sectional view taken along the line AA of the small flame forming group in the same device. Sectional view

FIG. 11 is a perspective view of a burner forming body and a small flame opening forming group in a combustion apparatus according to a fourth embodiment of the present invention.

FIG. 12 (a) is a side view of a small flame opening forming group in the device. (B) a side view of a burner body in the device.

FIG. 13 (a) AA of a small flame outlet forming group in the same device
Sectional view (b) BB sectional view of a small flame outlet forming group in the same device

FIG. 14 is a diagram showing a conventional combustion device.

[Explanation of symbols]

 Reference Signs List 20a, 20b Burner forming body 23 Fuel air inlet 24 Mixing passage 26 Burner ejection flame opening 27, 27a Strip plate 29 Small flame forming group 30 Flame passage 31 Small flame 32 Flow direction adjusting means (separation part) 42 Flow Direction adjusting means (bending pawl) 43 Notch 44 Flow direction adjusting means (parting part) 49 Flow direction adjusting means (stepping) A, B, C, D Flame port block

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hideo Tomita 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 3K017 AA01 AB02 AB10 AC02 AD10 AD11 CA03 CB07 CD01 DD04 DD08

Claims (5)

[Claims] 1. A small flame comprising a burner forming body that forms a fuel air inlet, a mixing passage, and a burner ejection flame port, and a plurality of band-shaped plates that divide the burner ejection flame port into a plurality of elongated flame port passages. An orifice forming group, and an elongated small flame port located downstream of the flame port passage, wherein the direction of flow of the mixed gas in the flame port passage is adjusted to a direction substantially perpendicular to the small flame port. A combustion device provided with at least one flow direction adjusting means on the upstream side of the small flame opening forming group. 2. The combustion device according to claim 1, wherein the flow direction adjusting means is provided with a partition portion which makes the band-shaped plate adhere to the small flame outlet without coming into contact therewith and which partitions a flame passage on the upstream side of the small flame hole forming group. . 3. As a flow direction adjusting means, a part of an upstream side of a single band-shaped plate located outside the small flame opening forming group is bent substantially perpendicularly to the band-shaped plate, and a part other than the bent band-shaped plate is bent. A notch is provided in the band-shaped plate at a position corresponding to a bent claw that is a bent portion of the bent band-shaped plate, and the bent claw is inserted into the notch, thereby upstream of the small flame opening forming group. The combustion device according to claim 1, wherein the combustion passage is configured to partition the side flame passage. 4. The flow direction adjusting means is provided with a partition member which is inserted into a flame port passage on the upstream side of the small flame port forming group to partition the flame port passage on the upstream side of the small flame port forming group. 2. The combustion device according to 1. 5. The combustion apparatus according to claim 1, wherein the small flame port is divided into a plurality of flame port blocks in the elongated direction.