JPH074621A - Burner device - Google Patents

Abstract

PURPOSE:To provide a clean combustion burner device wherein the generation of both nitrogen oxides and carbon monoxides is small. CONSTITUTION:In a swirling mixer 30, air coming in from the outside is swirled and caused to flow againt fuel gas ejected upwards from a gas ejection port 33 to form a highly concentrated premixed gas, which is led to a central flow dividing chamber 34. And fuel gas is ejected from a gas ejection port 37 approximately normal to the air entering mixing passages 26a, 26b to mix the air and fuel gas while the air and fuel gas are passing through the passages 26a, 26b thereby forming a low concentration premixed gas, which gas is led to side flow dividing chambers 35a, 35b. The upper openings of the chamber 34 and chambers 35a, 35b are closed by a burner mounting frame board 38 and a Y-shaped first burner is connected to an engaging short cylinder 42 of the board 38 and a lower end gas introducing part 39 of a second burner 44 is connected to a side gas distribution hole 41, so that a burner row wherein the first burners 43 and the second burners 44 are alternately disposed in rows is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner device for combusting a fuel gas, which is incorporated in a small-sized combustor such as a water heater, a bath heater, a gas heater or the like for domestic use or small-sized business use. .

[0002]

2. Description of the Related Art As is well known, there are various types of burner devices used in combustion devices such as water heaters and bath heaters. Recently, a clean burner device with a small amount of nitrogen oxides has been actively developed, and an example of the proposed burner device is shown in FIG.

In this proposal, a first burner 1 for burning a high-concentration premixed gas and a second burner 2 for burning a low-concentration premixed gas are arranged next to each other. The burner 1 has a plurality of first flame openings 3 on the flame opening forming surface 5, and the second burner 2 has a plurality of second openings on the flame opening forming surface 6.
4 are formed respectively, and the flame mouth forming surfaces 5 and 6 are formed.
Is formed in a planar shape. Gas nozzles 8 are arranged to face the gas inlets 7 of the burners 1 and 2, respectively.
Air supplied from a combustion fan (not shown) is taken into the fuel gas ejected from the gas nozzle 8 to the gas introduction port 7, and the fuel gas and the air are introduced from the gas introduction port 7 into the burner ports of the burners 1 and 2. The fuel gas and the air are diffusively mixed in the premixing portions reaching the forming surfaces 5 and 6, and the high-concentration premixed gas produced in the premixing portion of the first burner 1 is ejected from the first flame nozzle 3, The low-concentration premixed gas produced in the premixing section of the second burner 2 is ejected from the second flame port 4.

In this type of burner device, since the low-concentration premixed gas ejected from the second flame port 4 has a low concentration, it is difficult to burn by itself. In addition, the gas amount ratio of the low concentration gas is higher than that of the high concentration gas, and since the air amount for low concentration is increased and the gas concentration is lowered, the gas concentration of the low concentration premixed gas is lower than that of the high concentration premixed gas. The amount is much larger.
Therefore, the jet speed of the low-concentration premixed gas from the flame outlet is high, and stable combustion cannot be performed by itself.

On the other hand, since the gas ejected from the first flame port 3 has a high concentration and the ejection speed from the flame port is smaller than that of the low concentration mixed gas, excess air from the low concentration premixed gas is generated. Then, it burns relatively stably and holds the combustion flame of the low-concentration premixed gas.

As a result, low-temperature combustion of the low-concentration premixed gas in the combustion chamber achieves combustion with less generation of nitrogen oxides, and combustion of low-concentration gas and high-concentration gas with less generation of nitrogen oxides is realized. it can.

[0007]

In the above-mentioned conventional burner device, the stirring and mixing of the fuel gas and the air is promoted, and the flame openings 3 and 4 of any of the flame opening forming surfaces 5 and 6 are used. Also, it is desirable to eject gas with a constant ejection speed. Therefore, usually, a throttle portion having a sharply changed flow passage cross section is provided in the passage of the premixing portion extending from the gas introduction port 7 to the flame port forming surfaces 5 and 6.

[0008] However, when such a throttle portion of the flow path is provided, the pressure loss of gas or air passing through the premixing section becomes large, and in particular, the air supply amount to the second burner which requires a large amount of air. Therefore, there is a problem in that, when the rotation speed of the combustion fan is increased, the rotation noise of the combustion fan becomes louder than the combustion noise.

Further, in the above-mentioned conventional burner device,
Since the gas nozzles 8 are arranged to face the respective gas inlets 7 of the burners 1 and 2 arranged in an array, a large number of gas nozzles 8 are provided.
The work of setting up is complicated. Further, there is a problem that the work of forming the nozzle hole of the gas nozzle by drilling or the like is complicated and the work efficiency is low, and the manufacturing cost is high. Furthermore, when the diameter of the nozzle hole is small, the nozzle hole is easily clogged, and combustion This causes a problem of lowering the amount of heat.

Further, since the gas nozzle 8 is arranged for each of the burners 1 and 2, and the throttle portion is provided, there is a problem that the apparatus structure becomes complicated.

The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to have a simple apparatus configuration, easy processing and manufacturing, and further, to achieve a large pressure in the throttle portion as in the conventional example. It is an object of the present invention to provide a clean combustion burner device capable of producing a uniform premixed gas without causing a loss, reducing the amount of combustion heat due to clogging of nozzle holes, and reducing the cost.

[0012]

In order to achieve the above object, the present invention is constructed as follows. That is, the present invention is directed to a central diversion chamber containing the high-concentration premixed gas produced by the high-concentration premixed gas producing means, and a low-concentration precomposition chamber which is arranged on both sides of the central diversion chamber. A side diversion chamber for containing the low-concentration premixed gas created by the mixed gas creation means is provided, and a burner connection surface is formed in these central diversion chamber and side diversion chamber, and the burner connection surface of the central diversion chamber is formed. Is arranged with a plurality of central gas distribution holes communicating with the central distribution chamber, and a plurality of side gas distribution holes are formed on the burner connecting surfaces of the side distribution chambers on both sides of the central gas distribution hole forming region. A gas introduction part of a first burner for combusting a high-concentration premixed gas is arranged in an array in communication with the side diversion chambers, and each of the central gas distribution holes has a low-concentration gas distribution part. Second burning of mixed gas It is configured as characterized in the burner columns first burner and the second burner are arranged disposed side by side gas inlet portion of the over Na are connected, respectively, are formed,
In addition, the gas passage on the upstream side of the flame opening of the second burner is formed by using a straightening vane, and the length of the straightening vane in the gas passage direction is at least the flow of the low-concentration premixed gas flowing in a laminar flow. The first burner has a central tubular portion connected to the central gas distribution hole portion of the burner connecting surface, and an extension passage extending leftward and rightward from the upper side of the central tubular portion. Is formed in a substantially Y shape, and the upper surface of the extension passage portion is a flame port forming surface, and the gas passage on the upstream side of the flame port of the first burner uses a straightening plate. It is also a characteristic configuration of the present invention that a leak hole for sleeve sleeve formation that leaks the high-concentration premixed gas flowing through the gas passage is formed on the side surface of the baffle plate near the flame mouth.

[0013]

In the present invention having the above-mentioned structure, the high-concentration premixed gas produced by the high-concentration premixed gas producing means is guided to the central diversion chamber, and is distributed from the central diversion chamber to the plurality of first burners all together. The high-concentration premixed gas is jetted from the flame outlet of each first burner.

On the other hand, the low-concentration premixed gas produced by the low-concentration premixed gas producing means is introduced into the side diversion chamber,
From this side flow dividing chamber, a plurality of second burners are collectively distributed and supplied, and the low-concentration premixed gas is ejected from the flame port of each second burner.

In the present invention, since the first burner and the second burner are arranged side by side, the flames of the high-concentration premixed gas and the flames of the low-concentration premixed gas are alternately formed on the combustion surface. A clean combustion with less generation of nitrogen oxides is achieved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a burner device according to a first embodiment of the present invention assembled in a device case 21 together with a premixed gas generator 18 and a combustion fan 20, and FIG. 2 shows the device case 21. The disassembled and assembled state of the burner device incorporated in the above is shown together with the premixed gas generator 18. In these figures, the premixed gas generator 18 has a premixing section 23 formed above a fuel gas supply chamber 22, and a gas supply pipe 25 for fuel gas is connected to the fuel gas supply chamber 22.

The premixing section 23 has a rectangular block shape, and a pair of mixing passages 26 extending alternately in the longitudinal direction.
a and 26b are isolated from each other, and the mixing passage 26a is formed.
Has an air intake 27 at the left end of the drawing, and has a dead end on the outlet side of the mixing passage 26a. Mixing passage 26
Similarly, b has an air intake port 27 on the right end side in the drawing, and also has a dead end on the outlet side of the mixing passage 26b. The fuel gas in the fuel gas supply chamber 22 is raised to the bottom walls of the inlets of the mixing passages 26a and 26b, respectively, and
Gas ejection holes 37 are formed at 26a and 26b so as to eject at substantially right angles. The fuel gas rising from the gas ejection holes 37 and ejected to the mixing passages 26a and 26b collide with the air entering the mixing passages 26a and 26b from the air intake port 27 at substantially right angles and pass through the long mixing passages 26a and 26b. Air and fuel gas are uniformly agitated and mixed between them, and a low-concentration premixed gas is created by this agitation and mixing.
The low-concentration premixed gas producing means 14 is constituted by a and 26b and the gas ejection holes 37.

Mixing passages 26a, 26 are provided in the central portion of the premixing section 23.
A central mixing passage 28 is formed so as to vertically penetrate between b. A swirling mixer 30 is provided at the lower end side of the central mixing passage 28.
Is mounted and fixed on the upper side of the fuel gas supply chamber 22.

The swirling mixer 30 comprises a plurality of slope walls 31 inclined in the tangential direction of the circumference arranged at equal intervals in the circumference, and the air entering from the air inlet 32 of the swirling mixer 30 is guided to the slope wall 31. It is configured to create a swirling flow. On the bottom surface of the swirl mixer 30, that is, on the upper surface side of the fuel gas supply chamber 22, a plurality of gas ejection holes 33 for raising the fuel gas are formed inside the swirl mixer 30. The fuel gas rising upward from the gas introduction hole 33 and ejected into the swirling mixer 30 collides with the swirling air swirling flow introduced from the air introducing port 32 at a right angle, and the colliding air and the fuel gas swirl. Meanwhile, the high-concentration premixed gas is produced by uniformly stirring and mixing through the central mixing passage 28. The central mixing passage 28 and the swirling mixer 30
And the gas ejection hole 33, a high-concentration premixed gas producing means
15 are composed. In this specification, the high-concentration premixed gas and the low-concentration premixed gas have a fuel gas amount ratio of approximately 3: 7.
Is about 2: 8 to 1:10, and the ratio of air to theoretical air amount is about 0.7 to 1.7, and 0: 1.
4 to 0.8: Targets those who have a relationship of 2.6.

A central flow dividing chamber 34 is provided at the center of the upper side of the premixed gas generator 18 and side flow dividing chambers 35a, 35 are provided on both sides thereof.
Each b is sectioned. The bottom wall of the central diversion chamber 34 communicates with the outlet side of the central mixing passage 28, and the high-concentration premixed gas produced by the swirling mixing of the swirling mixer 30 is introduced therein. In addition, the mixing passage 26a
The dead end side of No. 2 communicates with the side diversion chamber 35a through the opening 36a, and the dead end side of the mixing passage 26b communicates with the side diversion chamber 35b through the opening 36b. Concentrated premixed gas is in the side diversion chamber 35
a, 35b.

The central branch chamber 34 and the side branch chambers 35a,
A burner mounting frame plate 38, which functions as a burner connecting surface, is placed and fixed on the upper surface side of 35b, and each of the flow dividing chambers 34, 35a, 35b.
The top opening of is closed. On the bottom surface side of the burner mounting frame plate 38, central gas distribution holes 40 are formed in a plurality of widthwise directions in a region facing the central premixed gas chamber 34.
A plurality of side gas distribution hole portions 41 are arranged in the width direction on the left and right sides of the aligned group of the central gas distribution hole portions 40 in the regions facing the side distribution chambers 35a and 35b. The arrangement pitch of the side gas distribution hole portions 41 is shifted by a 1/2 pitch position with respect to the arrangement pitch of the central gas distribution hole portion 40.

The burner mounting frame plate 38 is formed by press working or the like, and a fitting short cylindrical portion 42 rising upward is provided at the hole edge portions of each central gas distribution hole portion 40 and side gas distribution hole portion 41. Has been formed. Each central gas distribution hole
A high-concentration premixed gas is jetted to the fitting short tube portion 42 of the first
The lower end gas introduction part 29 of the burner 43 of is fitted and connected,
The pair of left and right side gas distribution hole portions 41 are fitted into the fitting short cylindrical portions 42, and the lower end gas introducing portions 39 on both the left and right sides of the second burner 44 for jetting the low-concentration premixed gas are fitted and connected, and the burner A plurality of first burners 43 and second burners 44 are alternately arranged in rows and supported by the burner support portions 45 on the upper ends of both sides of the mounting frame plate 38, and as shown in FIG. The burner surface of the burner 43 and the zone of the burner hole 4 of the second burner 44 are adjacent to each other to form a combustion surface.

The second burner 44 is, as shown in FIG. 2, provided with a straightening vane 10 inside the burner outer frame 46 to form a ribbon-shaped flame port 4. In this embodiment, the height of the straightening vane 10 is increased. The length in the direction is set to about 40 mm, and the low-concentration premixed gas is made into a complete laminar flow and ejected from the flame port 4. The angle α of the flame port formation surface on both left and right sides is ejected from the flame port 4. The ejection direction of the flame port 4 is set so that the insides of the flames of the low-concentration premixed gas are gently squeezed together.

On the other hand, the first burner 43 is a central gas distribution hole.
Extension passage portions 24a, 24b extending from the upper side of the central tubular portion 47 connected to the fitting short tubular portion 42 of the 40 with an inclination to the left and right sides.
Is formed, and the upper end surfaces of the extension passage portions 24a, 24b are flame opening forming surfaces, and a plurality of slit-like flame openings 4 are formed on the flame opening forming surface, and the overall Y shape is formed. Has become a burner. The angle of the left and right flame port forming surfaces of the first burner 43 is formed to be substantially equal to the flame port forming angle of the second burner 44.

The burner device in which the first burner 43 and the second burner 44 are arranged in a row is constituted as one unit, and if necessary, a plurality of units are collected to form a plurality of units as shown in FIG. A burner device for the unit is formed, a gas branch supply pipe 25 is connected to each unit, and each gas branch supply pipe 25 is connected to a basic gas pipe 48 via a solenoid valve 49. A proportional valve 50 is provided in the main gas pipe 48, and combustion switching of the burner combustion surface of each unit is performed by opening / closing control of the solenoid valve 49, and the opening amount control of the proportional valve 50 controls each unit. Variable proportional control of the amount of combustion on the combustion surface is performed.

In this embodiment, the high-concentration premixed gas is collectively supplied from the central flow dividing chamber 34 to the plurality of first burners 43,
Since the low-concentration premixed gas is similarly distributed and supplied from the side flow dividing chambers 35a and 35b to the plurality of second burners 44 at the same time, each of the burners 1 and 2 is provided as in the conventional example.
As compared with a system in which a gas nozzle 8 is provided for each burner and a premixed gas is created for each burner 1, 2, the device configuration is extremely simple and the cost of the burner device can be reduced.

Further, since the premixed gas is collectively supplied from the respective flow dividing chambers 34, 35a, 35b to the corresponding burners 43, 44, the uniform premixed gas can be supplied to the corresponding burners. Therefore, it is possible to achieve clean combustion with no uneven combustion and less generation of nitrogen oxides and carbon monoxide gas. In this demonstration test of clean combustion, the fuel distribution ratio of the high-concentration premixed gas and the low-concentration premixed gas was set to 3: 7, the air of the high-concentration premixed gas was 0.7 times the theoretical air amount, and the low-concentration premixed gas was The amount of air is 1.7 times the theoretical air amount, and the total air ratio of the high-concentration premixed gas and the low-concentration premixed gas is 1.4 times the theoretical air amount. When measured, nitrogen oxide is 0% oxygen
In terms of conversion, it was 40 ppm, carbon monoxide gas was 30 ppm, and it could be demonstrated that both nitrogen oxide and carbon monoxide gas achieved extremely low clean combustion.

Further, in the burner apparatus of the present embodiment, in order to make the premixed gas uniform and the gas ejection speed uniform for each burner 1 and 2 as in the conventional example, the cross section of the gas passage is suddenly changed. Since it is not necessary to provide a throttle portion, the pressure loss of the flow of the premixed gas is small, and it is not necessary to rotate the combustion fan up to compensate for the pressure loss portion of the throttle portion as in the conventional example. It is possible to obtain an effect that it is possible to prevent an increase in fan rotation noise due to an increase in rotation of the combustion fan.

Further, in this embodiment, a plurality of first burners are used.
Since the high-concentration and low-concentration premixed gases to be supplied to the 43 and the second burner 44 are collectively prepared and supplied, as in the conventional example, the gas nozzles 8 are arranged facing each other for each burner 1 and each burner. Since the method of creating the premixed gas for each of 1 and 2 is avoided, the size of the gas ejection holes 33 and 37 can be made larger than that of the conventional gas nozzle 8, and the phenomenon of lowering the combustion heat quantity due to the clogging of the nozzle holes can be prevented. Since this can be prevented, highly reliable burner combustion becomes possible.

Further, since the first burner 43 of this embodiment has a Y-shaped gas passage extending in the left-right direction from the central cylindrical portion 47, the high-concentration premixed gas has a relatively narrow flow passage. Since it rises through the central tubular portion 47, a rectifying action occurs in this central tubular portion 47, and moreover, the premixed gas flows separately from the upper end side of the central tubular portion 47 to the left and right, so it is lighter than air. Since the high-concentration premixed gas is turned upward by itself at each position of the Y-shaped gas passage and rises toward the flame nozzle 3 side, the lower end introduction part of the high-concentration premixed gas
The effect that the pressure loss in the flow passage section from 29 to the flame port 3 can be further reduced is obtained.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the mixing passages 26a and 26b of the premixing section 23 are used.
A mixing central passage 51 extending along these passages 26a and 26b is provided so as to extend between both ends of the mixing central passage 51.
The fuel gas is supplied from the fuel gas supply chamber 22 to the bottom side of the passage 52.
A gas ejection hole 33 for ejecting in a direction orthogonal to 51 is provided, and the air intake ports 52 on both ends of the mixing central passage 51 from the combustion fan are provided.
The air entering the inside of the passage from the fuel gas ejected from the gas ejection hole 33 collides at a right angle, and the colliding air and fuel gas are agitated and mixed while proceeding through the mixing central passage 51, and further at the center side of the passage 51. The mixed gas on the left and right sides is made to collide with each other to promote the stirring and mixing of the air and the fuel gas, and the high-concentration premixed gas created by this stirring and mixing is guided to the central diversion chamber 34. The configuration is similar to that of the first embodiment.

Also in this embodiment, the high-concentration premixed gas and the low-concentration premixed gas are collectively formed, and the premixed gas is collectively supplied from the central flow dividing chamber 34 and the side flow dividing chambers 35a, 35b to the corresponding burners 43, 44. With this configuration, the same effect as that of the first embodiment can be obtained.

FIG. 6 and FIG. 7 show a third embodiment of the present invention. In this embodiment, both the high-concentration premixed gas and the low-concentration premixed gas are produced by using the swirling mixer 60, and other configurations are the same as those of the first embodiment.
And it is almost the same as each of the second embodiments. The swirling mixer 60 of the present embodiment is configured to have two upper and lower swirling mixing portions, and in the lower swirling mixing portion, the air guided by the slope wall 31 and the inside formed in the fuel gas supply chamber 22 are formed. The gas rising upward from the gas ejection holes 61 of the above is collided at a right angle to form a high-concentration premixed gas of gas and air by swirling stirring, and this high-concentration premixed gas is placed in the central diversion chamber 34. It is introduced through the central tube passage 58. The upper half of the central diversion chamber 34 has a substantially trapezoidal cross section, and the left and right slopes 51a and 51b of the trapezoid are burner connecting surfaces, and the slopes 51a and 51b have a plurality of central portions. The gas distribution holes 40 are formed in an array in the longitudinal direction.

On the trapezoidal outer wall surface of the upper half part of the central flow dividing chamber 34, first burners 43 and second burners 44 having trapezoidal recesses on the central lower surface are alternately fitted and arranged in the longitudinal direction. Has been assembled.

At the upper part of the swirling mixer 60 of the swirling mixer 60, air is introduced from the outside along the sloped wall 59. The introduced air and the fuel gas supply chamber 22
From the gas injection hole 62 provided in the
The fuel gas rising upward from the gas ejection hole 65 through 63 collides at a right angle, and a low-concentration premixed gas is produced by swirling mixing of air and the fuel gas. It is designed to be introduced into the chambers 35a and 35b. The upper surfaces of the side flow dividing chambers 35a and 35b are covered with the lower surfaces of the first and second burners 43 and 44, and the lower surfaces of the respective burners 43 and 44 have the side flow dividing chambers 35a and 35b.
It functions as a chamber wall that closes the upper opening of b, and this chamber wall also serves as the burner connecting surface of the side flow dividing chambers 35a and 35b.

A gas inlet 54 is formed on the slope of the trapezoidal recess of the first burner 43 of the group of burners, and a central flow dividing chamber is formed.
The high-concentration premixed gas discharged from each central gas distribution hole 40 of 34 is taken into each first burner 43 through the gas introduction port 54, and is ejected from the flame port 3. The low-concentration premixed gas in the side flow dividing chambers 35a, 35b is introduced into the second burner 44 from the side gas distribution holes 41 also functioning as gas introduction ports provided on the left and right bottom surfaces of each second burner 44. It is configured to eject from the flame port 4.

This embodiment also has the same effects as those of the first and second embodiments.

FIG. 8 and FIG. 9 show a fourth embodiment of the present invention. In this embodiment, the gas passage on the upstream side of the flame opening of the first burner 43 is configured by using the straightening vane 10. The straightening vane 10 forms the flame opening 3 in a ribbon shape, and the vicinity of the flame opening 3 is formed. A leak hole 64 for leaking a part of the high-concentration premixed gas in the straightening plate gas flow path toward the flame port 3 to the outside is formed on the side surface of the straightening plate at the position, and the other configurations are the same as those in the above-described embodiments. Is the same as.

In this embodiment, the upstream side of the flame opening 3 of the first burner 43 is constructed by using the straightening vane 10. Therefore, the high-concentration premixed gas is passed through the gas passage formed by the straightening vane 10. Since the laminar flow can be ejected from the flame port 3, it becomes easy to control the ejection direction of the high-concentration premixed gas,
Further, since the high-concentration premixed gas can be ejected without causing unevenness in the ejection speed locally, it is possible to eliminate the uneven combustion in the combustion chamber.

Further, there is a leakage hole from the passage of the high-concentration premixed gas.
Since the high-concentration premixed gas is leaked to the surroundings through 64, a sleeve fire is formed in the leakage part of the high-concentration premixed gas, and this sleeve fire effectively maintains the flame of the low-concentration premixed gas on the adjacent side. Since it burns, it is possible to stabilize the low-concentration premixed gas flame, which can lower the combustion noise and improve the combustion characteristics to reduce the generation of both nitrogen oxides and carbon monoxide gas. A cleaner combustion can be achieved.

The present invention is not limited to the above-mentioned embodiments, and various embodiments can be adopted. For example, in each of the above embodiments, the flame port 4 of the second burner has a ribbon shape, but it may have a slit shape.
The shapes and sizes of the flame openings 3 and 4 of the 43 and the second burner 44 can be set in various modes according to the specifications.

If the low-concentration premixed gas producing means 14 and the high-concentration premixed gas producing means 15 are of a construction for producing the low-concentration premixed gas and the high-concentration premixed gas at the same time,
Other configurations may be used. In this case, the shapes and structures of the central flow dividing chamber 34, the side flow dividing chambers 35a and 35b, and the burners 43 and 44 are created according to the configuration of the premixed gas creating means 14 and 15.

Further, in each of the above embodiments, the second burner 44 is used.
The left and right combustion surfaces (flame formation surfaces) are connected and integrated as a single unit, but the left and right combustion surfaces are separated, and there is a burner with a left combustion surface in the burner row and a right combustion surface. The burners may be connected to the side gas distribution holes 41 and arranged in pairs.

[0044]

The present invention is provided with a central diversion chamber for containing a high-concentration premixed gas and a side diversion chamber for accommodating a low-concentration premixed gas.
It is configured so that the low-concentration premixed gas in the side diversion chamber is supplied to the plurality of second burners all at once, so that the gas nozzles are arranged to face each other as in the conventional example. Compared with the method of creating a premixed gas for each burner, the device configuration becomes extremely simple,
It is possible to eliminate the problem of the conventional example that the combustion performance deteriorates due to the clogging of the gas ejection nozzle.

Further, since the throttle portion of the premixed gas passage, which was necessary in the conventional example, is not necessary, the pressure loss in the passage section from the intake of the premixed gas to the burner to the flame port is reduced, and this Since it is not necessary to increase the rotation of the combustion fan in order to compensate for the pressure loss, it is possible to prevent an increase in fan rotation noise that accompanies the rise of the combustion fan.

Further, a uniform high-concentration premixed gas contained in the central diversion chamber is distributed and supplied to each first burner, and a uniform low-concentration premixed gas is distributed to the second burner from the side diversion chamber. Since it is supplied, the premixed gas ejected from each flame opening of the first burner and the second burner has no uneven mixing of air and fuel gas, which improves the combustion characteristics and improves the nitrogen oxide content. And, clean combustion with extremely low carbon monoxide gas production can be achieved.

Further, in the structure in which the straightening vanes are provided on the upstream side of the flame openings of the first burner and the second burner, the premixed gas ejected from the flame openings can be made into a laminar flow state. Therefore, it becomes easy to control the ejection direction of the premixed gas,
Further, since the turbulence of the premixed gas that is ejected can be reduced, the combustion noise can be further reduced.

Further, in the structure in which the gas passage on the upstream side of the flame opening of the first burner is constructed by using the straightening vanes and the leak holes are provided on the side surfaces of the straightening vanes in the vicinity of the flame openings, , The sleeve fire can be formed by the high-concentration premixed gas leaked from the leak hole, and the low-concentration premixed gas flame on the side adjacent to the sleeve fire is maintained by this sleeve fire, so that the combustion stability is improved, Moreover, combustion noise can be further reduced.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing a first embodiment of a burner device according to the present invention.

FIG. 2 is an exploded perspective view showing the burner device according to the embodiment.

FIG. 3 is an explanatory diagram of a combustion surface of the burner device of the same embodiment.

FIG. 4 is an explanatory view of a multifaceted combustion apparatus in which a plurality of burner apparatuses of the same embodiment are installed and arranged in a row.

FIG. 5 is an explanatory view showing the burner device of the second embodiment of the present invention in an exploded and assembled state.

FIG. 6 is a structural explanatory view showing a third embodiment of the present invention.

FIG. 7 is an exploded perspective view showing the burner device according to the embodiment.

FIG. 8 is an explanatory diagram of a first burner showing a fourth embodiment of the present invention.

FIG. 9 is an explanatory view showing a sleeve fire forming portion of the burner of the same embodiment.

FIG. 10 is an explanatory diagram of a conventional general burner device.

[Explanation of Codes] 3 First Flame Mouth 4 Second Flame Mouth 14 Low Concentration Premixed Gas Preparation Means 15 High Concentration Premixed Gas Preparation Means 33, 37, 61, 62 Gas Injection Hole 34 Central Dividing Chamber 35a, 35b Side diversion chamber 36a, 36b Opening 43 First burner 44 Second burner 53a, 53b Side diversion chamber 64 Leakage hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Komaki, 3-4 Fukamidai, Yamato City, Kanagawa Prefecture, Gaster Co., Ltd. (72) Inventor: Susumu Washikita, 3-4, Fukamidai, Yamato City, Kanagawa Prefecture (in Gaster Co., Ltd.) 72) Inventor Atsushi Akamatsu, 3-4, Fukamidai, Yamato City, Kanagawa Prefecture, inside Gaster Co., Ltd. (72) Masanori Enomoto, 3-4, Fukamidai, Yamato City, Kanagawa Prefecture (72) Inventor, Keiichi Ougi, Tokyo 1-13-18 Narita Higashi, Suginami-ku (72) Tatsuya Sugawara Tatsuya Sugawara 52-5 Oyamakanai-cho, Itabashi-ku, Tokyo (72) Inventor Kouji Hase 3118-3 Uehongo, Matsudo-shi, Chiba (72) Inventor Koichiro Ito Tokyo 4-9-32 Nukiinami-cho, Koganei-shi

Claims (4)

[Claims] 1. A central diversion chamber containing a high-concentration premixed gas produced by a high-concentration premixed gas producing device, and low-concentration premixing chambers arranged on both sides of the central diversion chamber to be partitioned from the central diversion chamber. A side diversion chamber containing the low-concentration premixed gas created by the gas creation means, and a burner connecting surface is formed in the central diversion chamber and the side diversion chamber,
A plurality of central gas distribution holes communicating with the central diversion chamber are arranged on the burner connection surface of the central diversion chamber, and the burner connection surfaces of the side diversion chambers on both sides of the central gas distribution hole forming region are arranged on the burner connection surface. A plurality of side gas distribution holes are arranged in communication with the side diversion chamber, and a gas introduction part of a first burner for burning a high-concentration premixed gas is provided in each of the central gas distribution holes. A burner row is formed in which the gas introduction portions of a second burner that burns a low-concentration premixed gas are connected to the distribution holes, and a burner row in which the first burner and the second burner are arranged side by side is formed. apparatus. 2. The gas passage on the upstream side of the flame opening of the second burner is formed by using a straightening vane, and the length of the straightening vane in the gas passage direction is at least a flow of the low-concentration premixed gas flowing therethrough. The burner device according to claim 1, wherein a length for flowing is secured. 3. The first burner comprises a central tubular portion connected to the central gas distribution hole portion of the burner connecting surface, and an extension passage portion extending leftward and rightward from the upper side of the central tubular portion. The burner device according to claim 1 or 2, wherein the burner device has a substantially Y shape, and an upper surface of the extension passage portion is a flame port forming surface. 4. The gas passage on the upstream side of the flame opening of the first burner is formed by using a straightening vane, and the side wall near the flame opening of this straightening vane forms sleeve fire for leaking the high-concentration premixed gas flowing through the gas passage. The burner device according to claim 1, 2 or 3, wherein a leak hole for the burner is formed.