JPH08200628A - Burner - Google Patents

Abstract

PURPOSE: To perform stable combustion and to improve flame transfer performance by providing a resistor for reducing the flowing velocity of combustion air or a thin mixed gas from a discharge port over the entire length of the adjacent intervals of the adjacent burning parts at the corresponding parts of the adjacent discharge ports at a specific fire forming part. CONSTITUTION: A discharge port 22 of combustion air or a thin mixed gas is provided at the same side as a burner port 13, and an air inlet 2 for introducing the air to a vent chamber 23 communicating with the port 22 is formed as burning parts 5 forming member. A gas supply means 30 for supplying fuel gas and an air supply means F for supplying the air are provided. In this case, the port 13 is formed of a plurality of fire forming parts 19 disposed at an interval along the longitudinal direction. In this case, a resistor 52 for reducing the flowing velocity of the air or the thin mixed gas discharged from the port 22 over the entire length of the adjacent intervals of the parts 5 is provided at the corresponding part of the ports 22 adjacent to a specific fire forming part 51 of the parts 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a flame opening for burning a mixture of fuel gas and combustion air formed on one end surface, and a mixing chamber communicating with the flame opening, and a fuel gas A plurality of flat combustion parts formed with an inlet for introducing combustion air are arranged side by side with an interval, and an outlet for discharging combustion air or a lean mixture is on the same side as the flame outlet. Equipped,
An aeration chamber communicating with the discharge port and an air introduction port for introducing combustion air into the aeration chamber are formed between adjacent combustion units with the combustion unit as a constituent member, and the introduction port of the combustion unit. The present invention relates to a combustion apparatus provided with a gas supply means for supplying a fuel gas to the above, and an air supply means for supplying combustion air to the inlet of the combustion section and the air inlet.

[0002]

2. Description of the Related Art In such a combustion apparatus, in order to reduce the combustion temperature of the entire apparatus to reduce NOx which is a nitrogen oxide as much as possible, combustion air or a light air-fuel mixture is provided between adjacent combustion sections. It has a discharge port for discharging,
As shown in FIG. 7, in the combustion device as described above,
Combustion air or a light air-fuel mixture that is discharged at high speed from the discharge port 04 on both left and right sides of the flame forming part 03 of the rich flame port 02 for burning the rich air-fuel mixture formed in the combustion burner 01 as the combustion part. A resistance plate 05 for reducing the flow velocity of the flame is formed to reduce the flow velocity of the combustion air and the light mixture near the discharge port portion 07 adjacent to the flame forming unit 03.
It is possible to prevent blowout of the flame formed in (1) as much as possible without lifting it (see, for example, Japanese Utility Model Laid-Open No. 61-149615).

In this prior art, the adjoining combustion burners 01 are considered only by reducing the flow velocity of the combustion air or the light mixture near the discharge port portion 07 adjacent to the flame forming portion 03. Since the resistance plate 05 is partially arranged only on the combustion burner 01 side in the adjacent space, a narrow discharge port 04 is formed between the resistance plates 05 facing each other, and this narrow discharge port 04 is formed. The combustion air and the light air-fuel mixture are discharged from the discharge port 04 at high speed, as indicated by the arrow in the figure.

[0004]

Therefore, when the combustion device is ignited, the flame forming portion 03 of the specific combustion burner 01 is used.
The flame formed by igniting the
There is a drawback that the so-called fire transfer performance is deteriorated, in which the flame forming portion 03 is sequentially ignited. That is, since the narrow discharge port 04 is formed between the flame forming portions 03 of the adjacent combustion burners 01, the flame formed in the flame forming portions 03 is formed in the flame forming portions 03 of the adjacent combustion burners 01. When transferring, the flame is easily blown off by the combustion air or the light air-fuel mixture discharged at a high speed from the narrow discharge port 04, and the transfer of fire is hindered.

The present invention has been made in view of the above circumstances, and an object thereof is to improve the fire transfer performance. In addition, another purpose is to prevent blowout of the flame formed in the flame forming part as much as possible, while enabling stable combustion,
It is to improve the fire transfer performance.

[0006]

In a combustion apparatus of the present invention, a flame port for burning a mixture of fuel gas and combustion air is formed on one end surface, and a mixing chamber communicating with the flame port and the mixing chamber are provided. A plurality of flat combustion portions having an inlet for introducing the fuel gas and the combustion air into the chamber are arranged side by side with an interval,
A discharge port for discharging combustion air or a light air-fuel mixture is provided on the same side as the flame port, and a ventilation chamber communicating with this discharge port and an air introduction port for introducing combustion air into the ventilation chamber are Combustion section as a constituent member is formed between adjacent combustion sections, gas supply means for supplying fuel gas to the inlet of the combustion section, and combustion air to the inlet of the combustion section and the air inlet. A first aspect of the present invention is a combustion apparatus provided with an air supply means for supplying the air. The first characteristic configuration includes a plurality of flame forming portions in which the flame openings are arranged at intervals along the longitudinal direction thereof. The flow velocity of the combustion air or the lean air-fuel mixture discharged from this discharge port is applied to the corresponding portion of the discharge port adjacent to the specific flame formation part of the formation part over the entire length of the adjacent interval between the adjacent combustion parts. In the point where the resistor to be lowered is placed That.

The second characteristic configuration is the same as the first characteristic configuration, in which a rectifying plate for rectifying the combustion air or the light air-fuel mixture discharged from the discharge port is arranged along the longitudinal direction of the discharge port. The bent portion formed by bending is formed in the resistor.

A third characteristic configuration is that in the second characteristic configuration, the bent portion is formed by partially bulging the current plate.

A fourth characteristic configuration is the same as the third characteristic configuration, in which a plurality of the straightening vanes are arranged in parallel at intervals in a direction orthogonal to the longitudinal direction of the discharge port, and the combusting portion of the plurality of straightening vanes is arranged. The rectifying plate arranged on the side is provided with a bulge portion that bulges toward the flame forming portion side corresponding to each of the flame forming portions.

The fifth characteristic configuration is the second, third or fourth.
In the characteristic configuration, the bent portion is also used as an interval holding member that holds the adjacent interval between the adjacent combustion parts at a constant interval.

A sixth characteristic configuration is the first, second, third,
In the fourth or fifth characteristic configuration, the discharge port formed between the adjacent combustion units is configured as a fresh flame port that burns a lean mixture, and the ventilation chamber communicating with the fresh flame port is formed. A light gas mixing passage configured to form a light air-fuel mixture and having a jet port for injecting the fuel gas or the air-fuel mixture for producing the light air-fuel mixture into the light-air mixing chamber; A light gas supply unit for supplying a fuel gas to the passage is provided, and the combustion unit is a rich combustion unit that burns a rich air-fuel mixture.

A seventh characteristic configuration is the same as the sixth characteristic configuration, in which the light gas communicating passage overlaps with the rich combustion portion when viewed from the direction of the air-fuel mixture discharge from the rich combustion port of the rich combustion portion. It is located at the point.

[0013]

The operation of the first characteristic structure is as follows.
The flow velocity of the combustion air or the lean air-fuel mixture discharged from the discharge port adjacent to the specific flame forming part of the flame forming part becomes slow over the entire length of the adjacent interval between the adjacent combustion parts, and the specific flame When the flame formed in the forming portion tries to move to the flame forming portion of the adjacent combustion portion, the flame is less likely to be blown off by the combustion air or the light air-fuel mixture.

The operation of the second characteristic structure is as follows in addition to the operation of the first characteristic structure. Combustion air or a light air-fuel mixture rectified by the current plate can be discharged from the discharge port, and when the light air-fuel mixture is rectified, the light gas mixture to be discharged from the discharge port can be cooled by the current plate. . Then, by forming a resistor with a bent portion formed by bending a rectifying plate arranged along the longitudinal direction of the discharge port, it is not necessary to separately manufacture the resistor and to assemble the resistor separately. .

In addition to the function of the second characteristic structure, the function of the third characteristic structure is such that the bent portion formed by partially bulging the current plate not only serves as a resistor but also the panel strength of the current plate. Can be increased.

The operation of the fourth characteristic structure is as follows in addition to the operation of the third characteristic structure. Combustion air or a lean air-fuel mixture that has been effectively rectified by a plurality of baffles can be discharged from the outlet, and when rectifying the lean air-fuel mixture, the light-air mixture that is about to be discharged from the outlet is Can be cooled effectively by the current plate. And, in the discharge port portion between each of the flame forming portion and the flow regulating plate disposed on the combustion portion side of the plurality of flow regulating plates, the bulging portion provided on the flow regulating plate is the combustion air or the light air-fuel mixture. And the flow velocity of the combustion air or the light air-fuel mixture near the flame forming portion becomes slow, and each of the flames formed in the flame forming portion becomes difficult to lift.

The function of the fifth characteristic structure is that, in addition to the function of the second, third or fourth characteristic structure, a space maintaining member for maintaining a constant space between adjacent combustion sections is manufactured, Furthermore, it is not necessary to separately assemble the spacing member.

The operation of the sixth characteristic structure is as follows:
In addition to the operation of the third, fourth or fifth characteristic configuration, a so-called rich / lean combustion device can be configured.

In addition to the operation of the sixth characteristic configuration, the operation of the seventh characteristic configuration is such that the light gas mixture passage is not positioned in the light mixing chamber formed between the rich combustion sections, and the light mixture is It does not easily become a resistance when passing through the mixing chamber.

[0020]

The effects of the first characteristic structure are as follows. When a flame formed in a specific flame formation part tries to move to the flame formation part of the adjacent combustion part, it is difficult for that flame to be blown off by the combustion air or the light mixture, so the flame formation of the adjacent combustion part It becomes easier to ignite the parts, and the fire transfer performance is improved.

The effects of the second characteristic structure are as follows in addition to the effects of the first characteristic structure. Since the rectified combustion air or the lean air-fuel mixture can be discharged from the discharge port, it is easy to stabilize the combustion, and when the lean air-fuel mixture is rectified, the lean air-fuel mixture can be cooled, so that flashback can be prevented. In particular, since it is not necessary to separately manufacture the resistor and separately assemble the resistor, the structure and the assembling can be simplified.

In addition to the effect of the second characteristic configuration, the effect of the third characteristic configuration can increase the panel strength of the flow regulating plate. Therefore, the weight of the entire apparatus can be reduced by using the thin current plate. be able to.

The effect of the fourth characteristic structure is as follows in addition to the effect of the third characteristic structure. Since the combustion air or the lean air-fuel mixture that is effectively rectified can be discharged from the discharge port, it is easier to stabilize combustion, and when rectifying the lean air-fuel mixture, the lean air-fuel mixture can be effectively cooled. The flashback can be further prevented. In particular, since the flame formed in each of the flame forming parts is less likely to lift, it is possible to prevent blowout of the flame formed in the flame forming part as much as possible, and to improve the fire transfer performance while enabling stable combustion. You can

The effect of the fifth characteristic configuration is, in addition to the effect of the second, third or fourth characteristic configuration, that it is not necessary to separately manufacture the distance maintaining member and to assemble the distance maintaining member separately. The structure and assembly can be simplified.

The effects of the sixth characteristic structure are as follows:
In addition to the effects of the third, fourth, and fifth characteristic configurations, the rich-lean combustion device can be configured, so that the combustion temperature of the entire device is lowered and the generation of nitrogen oxides is ensured while securing the desired thermal power. It can be reduced as much as possible.

The effect of the seventh characteristic configuration is, in addition to the effect of the sixth characteristic configuration, resistance to the light air-fuel mixture when passing through the light-air mixture chamber, so that the pressure loss of the combustion air or the light air-fuel mixture is reduced. It can be reduced.

[0027]

1 and 2 show a combustion device used in, for example, a burner unit of a hot water supply device, in which a burner case 1 is provided with a ventilation wall 3 in which a large number of first ventilation holes 2 are formed. A box-shaped frame body 4 is attached, and a plurality of rich combustion burners 5 as flat combustion portions are accommodated in the box-shaped frame body 4 in a positioned state.
Are arranged side by side in parallel at a predetermined interval.

An igniter 53 and a box-shaped fuel gas supply chamber 6 are attached to the burner case 1, and the igniter 53 is provided so as to correspond to the longitudinal center of the rich combustion burner 5 arranged on one end side. , Burner case 1 and fuel gas supply chamber 6
And the box-shaped frame body 4, an air ventilation path 8 is formed so as to surround the peripheral wall 7 of the box-shaped frame body 4, and a large number of second ventilation holes 9 are formed in the lower part of the peripheral wall 7. Has been done.

The bottom wall 10 and the ventilation wall 3 of the burner case 1
And an air chamber 11 is formed between them and an air outlet 12 of a fan F as an air supply means is opened in the bottom wall 10, and the air discharged from the air outlet 12 into the air chamber 11 is box-shaped. The air flows into the inside of the frame body 4 and the ventilation passage 8 and
The air that has flowed into is mainly used for generating a mixture with a fuel gas, which will be described later, and the rest is discharged upward along the inner surface of the burner case 1.

Each of the rich combustion burners 5 has a narrow width flame plate 14 in which a flat flame flame 13 is formed, and a flat flame whose upper end is connected to the periphery of the flame flame plate 14. A thick mixing chamber 17 communicating with the rich flame port 13 and a rich mixing chamber 17 are provided below the combustion case 16 including the cylindrical wall 15.
Is provided with a fuel gas for producing a rich air-fuel mixture and a rich inlet 18 for introducing combustion air, and the fuel gas and the combustion air supplied to the rich mixing chamber 17 are 17
In the process of passing through the combustion case 16 and the combustion case 16, a rich air-fuel mixture is generated, and the generated rich air-fuel mixture is discharged from the rich flame port 13 and burned.

The thickening flame port 13 has a plurality of flame forming portions 1
9 are arranged at a predetermined interval along the longitudinal direction of the flame nozzle plate 14, and these flame forming portions 19 are V-shaped in a plan view disposed at both ends in the longitudinal direction of the flame nozzle plate 14. There are two types of end flame forming parts 20 and a plurality of intermediate flame forming parts 21 arranged at intermediate positions between these end flame forming parts 20. It is configured by forming three slit-like air-fuel mixture ejection ports that are long in the direction orthogonal to the direction.

Below the rich combustion burner 5, there is provided a light gas passage 28 having a jet hole 27 for jetting a mixture for producing a light mixture into a ventilation chamber 23 as a mixture chamber for light which will be described later.
Further, a light introduction port 29 for introducing the fuel gas and the combustion air is provided in the light gas communication passage 28.

The rich burner 5 and the light gas passage 2
8 and the light introduction port 29 are configured by laminating a series of bent metal plates to each other by spot welding or the like, and the light gas communication passage 28 is formed by a rich mixture from the rich flame port 13 of the rich combustion burner 5. When viewed in the direction of air discharge, the rich combustion burner 5 is vertically overlapped with each other, and each of the rich introduction port 18 and the light introduction port 29 is a through hole formed in the peripheral wall 7 of the box-shaped frame body 4. It is connected to the.

The flame tip plate 14 of the adjacent burner 5 for rich combustion
A discharge port 22 for discharging combustion air or a light air-fuel mixture is formed between them, and the flat combustion space formed between the rich combustion burners 5 is used as a constituent member thereof. A first ventilation hole 2 is formed in the ventilation chamber 23, the space of which communicates with the discharge port 22, and communicates with the ventilation chamber 23 in a state of being located between the rich combustion burners 5. It is configured as an air introduction port for introducing air, and a side portion of the ventilation chamber 23 on the side of the combustion case 16 is configured as a rectification path 24 for rectifying the combustion air or the lean air-fuel mixture discharged from the discharge port 22.

In each of the straightening paths 24, as shown in FIG. 3, four metal straightening plates 25, 26 are arranged along the longitudinal direction of the discharge port 22, and these straightening plates 25, 26 are provided.
Is a state in which it is projected above the upper surface of the flame nozzle plate 14,
Two straightening vanes 25 and 26, which are arranged side by side in a direction orthogonal to the longitudinal direction of the discharge port 22 with a space therebetween and are arranged on one side of one burner 5 for rich combustion, are set as one set, and each set is formed. Are assembled in advance on both sides of the combustion case 16 of each rich-burning burner 5 at intervals.

In this way, the straightening vanes 25 and 26 are connected to the flame vent plate 1
4 when projected above the upper surface of the rectifying plate 25,
Since the heat dissipation area of 26 is wide, when the later-described light air-fuel mixture is discharged from the discharge port 22, the light air-fuel mixture can be effectively cooled, and the light air-fuel mixture is placed at a position higher than the rich air-fuel mixture. Can be burned at.

The first straightening vanes 25, which are arranged on the side of the rich burner 5 of the straightening vanes 25, 26 forming one set, are provided with the first straightening vanes corresponding to the respective intermediate flame forming portions 21. A first bulge portion 46 that partially bulges toward the intermediate flame forming portion 21 is provided as a bent portion formed by bending the rectifying plate 25.

A straightening plate 25, which is a set of the two sheets,
The second straightening vane 26 of the first straightening vane 25, which is disposed outside the rich burner 5 among the second straightening vanes 26,
The second rectifying plate 26 is bent so as to correspond to each of the first bulging portion 46 of the bulging portion 46 arranged on both ends of the rectifying plate and the first bulging portion 47 arranged at the center of the rectifying plate. A second bulge portion 48 that partially bulges is provided on the side of the first bulge portion as the formed bent portion.

Further, the second straightening vane 26 is bent above the second swollen portion 49 provided corresponding to the first swollen portion 47 of the second swollen portion 48 arranged at the center of the straightening vane. A third bulging portion 50 that bulges in a direction opposite to the bulging direction of the second bulging portion 49 is provided as a bent portion formed by the above.

The first straightening plate 25 and the second straightening plate 26 are
The first rectifying plate 25 connects each of the first bulges 46 to the combustion case 1
The second rectifying plate 26 is in contact with the six side surfaces, and the second rectifying plate 26 is in contact with the recessed surface side of the corresponding first bulging portion 46. The dense combustion burners 5 adjacent to each other, which are assembled and fixed in advance, are housed in the box-shaped frame body 4 in a state in which the third bulged portions 50 of the second flow straightening plate 26 are in contact with each other.

Then, as shown in FIGS. 4 and 5, at the corresponding portion of the discharge port 22 adjacent to the flame forming portion 51 arranged in the center of the intermediate flame forming portion 21, at the center of the first straightening plate 25. A resistor 52 is formed of the first bulging portion 47 arranged, the second bulging portion 49 adjacent to the first bulging portion 47, and the third bulging portion 50 abutting against each other, With this resistor 52, the flow velocity of the combustion air or the light air-fuel mixture discharged from the discharge port 22 adjacent to the flame forming portion 51 is decreased over the entire length of the adjacent interval between the adjacent rich combustion burners 5. The burn transfer performance is improved from the rich burn burner 5 arranged at one end of the burner case 1 to the rich burn burner 5 arranged at the other end.

Further, the first bulging portion 47, the second bulging portion 49, and the third bulging portion 50 which form the resistor 52 have a constant gap between adjacent rich combustion burners 5. It is also used as a space holding member for holding.

In the fuel gas supply chamber 6, the rich mixing chamber 1
A rich gas nozzle 30 as a rich gas supply means for supplying a rich fuel gas to 7 and a light gas nozzle 31 as a light gas supply means for supplying a light fuel gas to the light gas passage 28, The rich gas inlet 30 and the light gas inlet 29 are attached so as to correspond to each other.
, And each of the light gas nozzles 31 is inserted into the corresponding light introduction port 29. It should be noted that the light gas nozzle 31 is not inserted into the light introduction port 29 provided below the right end burner 5 for rich combustion shown in FIG.

When fuel gas is blown from the rich gas nozzle 30 into the rich inlet 18, the ejector action causes the air in the ventilation passage 8 to flow into the rich inlet 18 as combustion air at a predetermined ratio. In the process of being sucked and passing through the rich mixing chamber 17, they are mixed to generate a rich mixture,
The generated rich air-fuel mixture is discharged from the rich flame port 13.

Further, when the fuel gas is blown from the light gas nozzle 31 into the light introduction port 29, the ejector action of the fuel gas causes the air in the ventilation passage 8 to flow into the light introduction port 29 as combustion air at a predetermined ratio. Suctioned and light gas passage 28
Are mixed in the process of passing through to generate the air-fuel mixture for generating the light air-fuel mixture, and the generated air-fuel mixture is ejected from the ejection holes 27 into the ventilation chamber 23.

As shown in FIG. 6, the fuel gas supply chamber 6 has a rich fuel gas chamber 3 communicating with a rich gas nozzle 30.
Fuel gas chamber 33 for light, which communicates with 2 and the gas nozzle 31 for light
A first partition wall 34 that divides the fuel gas chambers for concentration 30 is provided, and the fuel gas chambers 32 for concentration are communicated with the first fuel gas chambers 35 for concentration that are connected to every other gas nozzle 30 for concentration and the remaining gas nozzles 30 for concentration. The second corrugated section that is partitioned into the second rich fuel gas chamber 36
A partition wall 37 is provided.

The lean fuel gas chamber 33 is provided with a lean fuel gas supply passage 39 via a lean flow rate adjusting valve 38, and the first rich fuel gas chamber 35 is passed through a first rich flow rate regulating valve 40. First
The rich fuel gas supply passage 41 is connected to the second rich fuel gas chamber 36 via the second rich flow rate adjusting valve 42, and the second rich fuel gas supply passage 43 is connected to the second rich fuel gas supply passage 43. The passage 39 and the first and second rich fuel gas supply passages 41 and 43 are connected to the fuel gas supply passage 45 via a main gas amount adjusting valve 44.

When the combustion load is large and high, the fuel gas is supplied to each of the light fuel gas chamber 33, the first rich fuel gas chamber 35, and the second rich fuel gas chamber 36, and the combustion load is increased. When the load is small and the load is small, the light flow rate adjusting valve 38 is closed and the first rich flow rate adjusting valve 40 or the second rich flow rate adjusting valve 4 is used.
2 is closed to supply the fuel gas to either the first rich fuel gas chamber 35 or the second rich fuel gas chamber 36,
When the combustion load is medium, the flow rate adjustment valve for light 38
Only this is closed, and the fuel gas is supplied to both the first rich fuel gas chamber 35 and the second rich fuel gas chamber 36.

Therefore, at the time of high load, all of the discharge ports 22 formed between the flame port plates 14 of the adjacent burners 5 for rich burn are used as the lean burn ports for burning the lean air-fuel mixture, and for the rich burn. The ventilation chambers 23 formed between the burners 5 respectively function as light mixing chambers that generate a light mixture, and are discharged from the rich flame outlet 13 and the light flame outlet 22. The light mixture is burned. It should be noted that, in this light air-fuel mixture, the air-fuel mixture ejected from the ejection holes 27 into the light-air mixing chamber 23 and the air flowing into the light-air mixing chamber 23 through the first ventilation hole 2 are the light-air mixing chamber 23. It is mixed and produced in the process of passing through.

Further, when the load is medium or low, the air-fuel mixture is not ejected from the ejection hole 27, and the air flowing in through the first ventilation hole 2 is used as the secondary air for the rich combustion burner 5 as the ventilation chamber 23. And is discharged from the discharge port 22.

[Other Embodiments] 1. The resistor may be composed of a member different from the rectifying plate. 2. The resistor may be integrally provided on the combustion unit side. 3. The resistor may be arranged at a different position for each adjacent adjoining combustion section. 4. The combustion device according to the present invention may not burn the light air-fuel mixture. 5. In the above embodiment, each of the light introduction ports 29 and each of the light gas nozzles 31 are connected to each other so that only the light fuel gas is supplied to the light gas passage 28, and ventilation is performed from the ejection holes 27. Fresh fuel gas ejected into the chamber 23,
The lean air-fuel mixture may be generated by mixing the combustion air introduced into the ventilation chamber 23 from the first ventilation hole 2.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 Partial cross-sectional side view

FIG. 2 is a partially cutaway perspective view.

FIG. 3 is a perspective view of a main part

FIG. 4 is a sectional view of a main part

FIG. 5 is a plan view of a main part.

FIG. 6 is a partial cross-sectional side view of the main part.

FIG. 7 is a sectional view of a main part showing a conventional example.

[Explanation of symbols]

 2 Air Inlet 5 Combustion Part (Dense Combustion Part) 13 Flame Port (Enrichment Flame Port) 17 Mixing Chamber 18 Inlet Port 19 Flame Forming Portion 22 Discharge Port (Flame Outlet for Light) 23 Ventilation Chamber (Mixing Room for Light) 25 Straightening plate 26 Straightening plate 27 Jet port 28 Light gas passage 30 Gas supplying means 31 Light gas supplying means 46 Bulging portion 47 Bending portion 49 Bending portion 50 Bending portion 51 Specific flame forming portion 52 Resistor F Air supplying means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinobu Ishihara 1-152 Oka, Minami-shi, Minato-ku, Osaka City, Osaka Prefecture Harman Co., Ltd.

Claims (7)

[Claims] 1. A flame port (13) for burning an air-fuel mixture of fuel gas and combustion air is formed at one end face, and the flame port (1) is formed.
3) a mixing chamber (17) communicating with this mixing chamber (17)
A plurality of flat combustion parts (5) having an inlet (18) for introducing fuel gas and combustion air are formed side by side at intervals to discharge combustion air or a light air-fuel mixture. A discharge port (22) is provided on the same side as the flame port (13), and the discharge port (2)
Ventilation chamber (23) communicating with 2) and this ventilation chamber (23)
An air introduction port (2) for introducing combustion air into the combustion unit (5) is formed between adjacent combustion units (5) having the combustion unit (5) as a constituent member, and the introduction port (of the combustion unit (5) ( Gas supply means (30) for supplying fuel gas to 18), and air supply means (F) for supplying combustion air to the inlet (18) of the combustion section (5) and the air inlet (2). In which the flame port (13) is composed of a plurality of flame forming portions (19) arranged at intervals along the longitudinal direction of the flame forming portion (19). Specific flame formation part (5
The flow velocity of the combustion air or the lean air-fuel mixture discharged from the discharge port (22) is applied to the portion corresponding to the discharge port (22) adjacent to 1) over the entire length of the adjacent interval between the adjacent combustion units (5). A combustion device in which a resistor (52) that lowers the temperature is arranged. 2. A rectifying plate (25, 26) for rectifying the combustion air or the light air-fuel mixture discharged from the discharge port (22).
Are arranged along the longitudinal direction of the discharge port (22), and bent portions (47, 49, 50) formed by bending the straightening plates (25, 26) are formed in the resistor (52). The combustion device according to claim 1. 3. The combustion apparatus according to claim 2, wherein the bent portion (47, 49, 50) is formed by partially bulging the flow straightening plate (25, 26). 4. A plurality of the straightening vanes (25, 26) are arranged side by side in a direction orthogonal to the longitudinal direction of the discharge port (22) with a space therebetween, and the plurality of straightening vanes (25, 26) are arranged. In the current plate (25) arranged on the side of the combustion section (5), the flame forming section (1) is made to correspond to each of the flame forming sections (19).
The combustion device according to claim 3, wherein a bulging portion (46) bulging to the 9) side is provided separately. 5. The distance bending member (47, 49, 50) is also used as a distance holding member for holding a constant distance between adjacent combustion portions (5). Combustion device as described. 6. A discharge port (22) formed between the adjacent combustion sections (5) is configured as a light flame port for burning a light air-fuel mixture, and communicates with this light flame port (22). The aeration chamber (23) is configured as a light mixing chamber for generating a light air-fuel mixture, and a jet port (27) for injecting the fuel gas or the air-fuel mixture for the light air-fuel mixture generation into the light air mixing chamber (23). And a light gas supply means (31) for supplying a fuel gas to the light gas communication passage (28), and the combustion section (5) is rich. The combustion apparatus according to claim 1, wherein the combustion apparatus is configured in a rich combustion section that burns an air-fuel mixture. 7. The light gas passage (28) overlaps with the rich combustion section (5) when viewed from the direction of the air-fuel mixture discharge from the rich flame port (13) of the rich combustion section (5). The combustion device according to claim 6, wherein the combustion device is arranged in a position.