JP2586385Y2 - Burner device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner device which is incorporated in a combustion device such as a water heater or a bath kettle to burn fuel gas.

[0002]

2. Description of the Related Art As is well known, recently, a burner apparatus for clean combustion that generates less nitrogen oxides has been actively developed.
No. 6715.

In this apparatus, as shown in FIG. 14, a main mixing chamber 70 and a sub mixing chamber 71 are formed inside a burner device, and the main mixing chamber 70 and the sub mixing chamber 71 are partitioned by a partition member 72. ing. The partitioning member 72 is formed by projecting a plurality of cylindrical members 74 upward on a base plate 73 with a space therebetween.
A flame port plate 75 made of a heat-resistant material such as ceramic on the upper side of 74
Are provided, and a plurality of flame ports are formed in the flame port plate 75. The cylindrical hole of the cylindrical member 74 is a cylindrical passage for guiding the low-concentration premixed gas created in the main mixing chamber 70, and the low-concentration premixed gas is supplied from a flame port 77 communicating with the cylindrical passage 76. Gushing.

The space between the cylindrical members 74 is communicated with a sub-mixing chamber 71 for producing a high-concentration premixed gas to form a rich mixture passage 79. A premixed gas of a concentration is ejected.

[0005] As described above, the premixed gas having a high concentration and the premixed gas having a low concentration are ejected side by side from the flame ports 77 and 78 of the flame port plate, and the main flame of the low concentration premixed gas is discharged to the burner combustion surface. By forming the auxiliary flame of the high-concentration premixed gas side by side, low-temperature combustion is performed, and clean combustion with less generation of nitrogen oxides is performed.

[0006]

[Problem to be solved by the invention]
The work of forming 75 from a heat-resistant material such as ceramic is very complicated and poor in workability, and the sintering process of this ceramic material and the like causes deformation due to heat shrinkage, and this deformation causes irregularities in assembly dimensions. Or the hole diameters of the flame outlets 77 and 78 are not formed as designed, causing problems such as poor combustion performance, which is a problem in terms of manufacturing reliability.

The partition member 72 is also attached to the base plate 73 by the cylindrical member 74.
Is required, and the work efficiency of manufacturing is poor.
Due to the poor dimensional accuracy due to the heat shrinkage of the flame port plate 75, there is a problem that it is not possible to quickly respond to a request for changing the specification of the burner device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its object is to make it easy to manufacture, have good dimensional accuracy, and to quickly respond to a request for specification change. It is to provide a burner device which can be used.

[0009]

The present invention is configured as follows to achieve the above object. In other words, the
The burner device according to the first aspect of the present invention includes a box-shaped burner case having an upper surface opening made of a metal plate, and the upper surface opening of the burner case is closed by an upper plate made of a metal plate, and the inside is surrounded by the burner case and the upper plate. The entire space is outside the burner case by a bent plate formed by bending a metal plate.
And a low-concentration premixed gas passage through which a high-concentration premixed gas passage through which a high-concentration premixed gas introduced through the gas flows and a low-concentration premixed gas passage through which a low-concentration premixed gas introduced from outside the burner case passes. The upper plate is formed with one or more first flame ports leading to the high concentration premixed gas passage and one or more second flame ports leading to the low concentration premixed gas passage. And a second consideration.
The plan has the configuration of the first invention, and the inside of the burner case is provided.
High-concentration premixed gas passage and low-concentration premixed gas passage
Each premixed gas is sent out from outside the burner case.
The mixing device is provided with a gas injection passage communicating with the fuel gas supply passage.
Air that is provided around the area where the vent is formed and enters from the outside
To the fuel gas from the gas outlet
Collision and swirl mixing of air and fuel gas to produce premixed gas
Swirl mixer with swirl guide to discharge and further downstream
Around the gas outlet communicating with the gas supply passage
Premixed by applying swirling force to the air that enters from outside
With other swirl mixers with swirl guides to create gas
It is connected to form a multi-stage type, and swirl mixing on the upstream side
One of the mixer and the downstream swirl mixer is a highly concentrated premixed gas
Create a high concentration premixed gas passage inside the burner case
And the other creates a low-concentration premixed gas
A structure for delivering to the low concentration premixed gas passage inside the na case,
The feature is that it is constituted. further,
The third invention comprises the configuration of the first or second invention,
The first burner port is configured as characterized by being arranged in a manner surrounding the second flame port, further, the fourth invention, the above
It has the configuration of the first or second or third invention, wherein the second flame group is a plurality of dense groups, and this second flame group is interposed via the first flame port zone. It is characterized by being provided continuously in plurals , and furthermore, the fifth aspect
The plan is a configuration of the first or second or third or fourth invention.
In the burner case is a boundary region of the formation zone of the second flame port, and the high-concentration premix gas in the high-concentration premix gas passage is low-concentration upstream of the flame port at the boundary portion. A gas passage to be introduced into the premixed gas passage is formed
It has been configured as a feature a.

[0010]

In the present invention having the above structure, the box-shaped burner case is formed by pressing a metal plate, and the bent plate for dividing the low-concentration premixed gas passage and the high-concentration premixed gas passage is also formed of the metal plate. Similarly, the upper plate and the first and second flame ports are formed by pressing a metal plate or the like.

By incorporating a burner case, a bent plate, and an upper plate which are easily formed by the press working, a clean combustion of a low concentration premixed gas flame and a high concentration premixed gas flame are formed side by side. A burner device is easily manufactured.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of the overall configuration of a burner device according to the present invention. In the figure, a gas supply pipe 20, which is a gas supply passage, communicates with a gas supply chamber 22 of a premixing device 21. Above the gas supply chamber 22, an upper and lower two-stage swirl mixer 23a is provided. , 23b are provided. FIG. 2 shows a cross-sectional structure of the premixing device 21.
FIG. 3 shows an exploded configuration of 23a and 23b. In these figures, the above-mentioned gas is provided on the bottom surface 24 of the lower-stage whirl mixer 23a.
Gas outlet communicating with the gas supply pipe 20 through the gas supply chamber 22
A plurality of gas through holes 25 are formed, and a plurality of guide blocks 26 as turning guides are arranged at equal intervals on the outer peripheral edge of the bottom surface 24. The inclined surface 27 is inclined substantially tangentially with respect to the arrangement pitch circle of the through-holes 25, and is configured to apply a turning force to air entering along the inclined surface 27 from the outside. And each of these guide blocks 26
The gas through hole 25 is arranged on the outlet side to the inside of the air that enters from outside through the gap.

An upper vortex mixer 23b is connected to the upper side of the lower vortex mixer 23a by superposition , and is a gas ejection hole provided on a bottom surface 28 of the vortex mixer 23b. hole 30 is communicated with the through hole 31 provided in the guide block 26 of the swirl mixer 23a, the gas supply and the through-holes 31
It communicates with the gas supply pipe 20 via a supply chamber 22 . Bottom
The outer periphery of 28 is swirled in the same manner as the lower swirl mixer 23a.
A guide block 32 serving as a guide is provided, and the guide block 32 also has an inclined surface 33 that imparts a turning force to air entering from outside.

Of the two-stage whirl mixers 23a and 23b,
When air supplied from a fan (not shown) enters along the inclined surface 27 of the guide block 26, the lower-stage swirling mixer 23a imparts a swirling force to pass the gas from the gas supply chamber 22 through the gas through hole 25. The fuel gas that rises is caused to collide with the fuel gas from a right angle direction, and the fuel gas and air are mixed while swirling. The mixed premixed gas is supplied to the high-concentration premixed gas passage 5 inside the burner case 34. It is configured to lead to. In addition, the upper-stage swirling mixer 23b also applies a swirling force to air entering from outside along the inclined surface 27 of the guide block 26 to prevent gas rising from the through-hole 31 and the gas through-hole 30. The fuel gas and the air are swirled and mixed by colliding the swirling air from a right angle direction, and the mixed gas is guided to the low concentration gas passage 7 inside the burner case 34 .

In this embodiment, the ratio of the amount of fuel gas supplied to the lower whirl mixer 23a to the amount of fuel gas supplied to the upper whirl mixer 23b ranges from 5: 4 to 3: 7. The ratio is set so that a small amount of fuel gas is injected into the swirl mixer 23a.
0.4 to 0.6 times the amount of air is taken in and mixed to produce a high concentration premixed gas, and the upper stage swirl mixer 23b from which a large amount of gas is ejected contains air of about 1.5 to 1.7 times the theoretical air amount. It is incorporated and mixed to produce a low concentration premixed gas.

The burner 1 connected to this premixing device is
A burner case 34 having an upper surface opening formed by pressing a metal plate into a box shape is provided, and the upper surface opening of the burner case 34 is closed by an upper plate 36 made of a metal plate. The upper plate 36 is provided with a plurality of holes serving as flame ports by press working or the like. A bent plate 35 formed by bending a single metal plate by press working or the like is provided in a burner case 34, and FIG.
As shown, it is surrounded by a burner case 34 and an upper plate 36.
The high-concentration premixed gas passages 5 and the low-concentration premixed gas passages 7 are alternately defined by the bent plate 35 in the entire internal space . Above the high-concentration premixed gas passage 5, the flame of the upper plate 36 communicating with the gas passage 5 functions as the first flame 3 for ejecting the high-concentration premixed gas.
Similarly, on the upper side of the low-concentration premixed gas passage 7, the flame of the upper plate 36 communicating with the gas passage 7 functions as the second flame 4 for ejecting the low-concentration premixed gas. The high-concentration premixed gas passage 5 is used to pass the high-concentration premixed gas produced by the lower-stage swirling mixer 23 a of the premixing device 21 outside the burner case 34.
The low-concentration premixed gas passage 7 is configured such that the low-concentration premixed gas produced by the upper-stage swirling mixer 23b is guided from outside the burner case 34 .

A frame wall 40 is provided below the premixing device 21, and an air introduction hole 41 for introducing air supplied from a fan (not shown) is provided in the frame wall 40. The air that has passed through the air introduction holes 41 is
a, 23b.

In this embodiment, a high-concentration premixed gas is ejected from the combustion surface of the burner device, that is, from the first flame 3 on the upper surface of the upper plate 36, and from the second flame 4 adjacent thereto. Low-concentration premixed gas is ejected side by side, and high-concentration premixed gas receives air in the low-concentration premixed gas next to it and burns.
The low-concentration premixed gas is burned by receiving the high-temperature heat of the high-concentration premixed gas. In that case, the amount of low concentration premixed gas is much greater than the amount of high concentration premixed gas, so that the combustion surface is almost entirely occupied by low concentration flame, thereby achieving low temperature combustion and reducing nitrogen oxides. Clean combustion with less production is achieved.

The low-concentration premixed gas is too lean to be burned by itself, but in this embodiment, the high-concentration premixed gas is ejected from the side adjacent to the low-concentration premixed gas. A low-concentration premixed gas zone in which a low-concentration premixed gas and a high-concentration premixed gas are mixed is formed in the boundary region between the gas flame and the high-concentration premixed gas flame. The flame transferability of the flame with the concentration premixed gas is good, the flame retention of the low concentration premixed gas flame is excellent due to the high concentration premixed gas flame, and the low concentration premixed gas flame exits the second flame 4 By being formed immediately after, the lift of the low-concentration premixed gas flame (the phenomenon in which the flame rises from the flame opening) is suppressed, and low-noise combustion becomes possible.

Further, according to the burner device of the present embodiment, since the upper plate 36 forming the flame ports 3 and 4 is formed of a metal plate, the flame ports 3 and 4 can be precisely formed by press working or the like. The bent plate 35 that forms the gas passages 5 and 7 can be formed easily by simply pressing and bending a single metal plate. The performance is dramatically improved, and it is possible to quickly respond to a request for changing the specifications of the burner device.

Further, since the flame ports 3 and 4 can be formed with high dimensional accuracy by press working, it is possible to form the flame ports as instructed by the design, thereby providing a burner device having excellent combustion performance.

Incidentally, with respect to the formation of the gas passages 5 and 7 and the formation of the flame ports 3 and 4, various embodiments are possible. For example, as shown in FIG. 4, a metal bent plate 42 having a U-shaped cross section is formed by press working or the like, and the bent plate 42 is fixed between the bottom surface of the burner case 34 and the upper plate 36 by spot welding or the like. Installed and fixed with a gap between the bent plate 42 and the upper plate
The space surrounded by 36 may be the high-concentration premixed gas passage 5, and the space formed between the bent plates 42 may be the low-concentration premixed gas passage 7.

As shown in FIG. 5, the height of the bent plate 42 having a U-shaped cross section is reduced, and the upper end of the bent plate 42 is fixed to the upper plate 36 by spot welding or the like. The gas passages 5 and 7 may be provided so as to be suspended.

Further, as shown in FIG.
Are provided at the left and right ends of the high-concentration premixed gas passage 5, that is, in the vicinity of the endmost flame port 4 of the group of second flame ports 4, and FIG. As shown in (2), the second burner 4 may be formed so as to surround a group of the second flame outlets 4 for ejecting a low-concentration premixed gas. With this configuration, a high-concentration premixed gas flame on the first flame port 3 side is mixed around the low-concentration premixed gas flame in the group of the second flame ports 4. The low-concentration premixed gas flame is smoothly continued, and the lift phenomenon of the low-concentration premixed gas flame is suppressed. In addition, since the number of the flame ports 4 can be increased, the flame port load is reduced and the combustion is reduced. Noise can be very low. Moreover, since the flame port 3 surrounds the group of the flame ports 4, a high concentration premixed gas flame is formed so as to wrap around the low concentration premixed gas flame, and the low concentration premixed gas flame is formed. Can also be sufficiently enhanced.

Further, as shown in FIG. 7, the upper plate 36 is also formed into a bent shape by pressing or the like in the same manner as the bent plate 35.
The bent portion of the upper plate 36 and the bent portion of the upper plate 36 face each other, and the upper plate 36 and the bent plate 35 are fixed by spot welding or the like to form a high-concentration premixed gas passage 5 and a low-concentration premixed gas passage 7. Can also be formed. In the example of FIG. 7, a communication hole 43 is provided in the bent side wall of the upper plate. In the configuration of FIG. 7, the second flame 4 is lower than the first flame 3, and the second flame 4 communicates with the base portion of the low-concentration premixed gas flame on the side of the second flame 4. As a result of introducing a part of the highly concentrated premixed gas through the hole 43, the lift of the low concentration premixed gas flame can be suppressed. In the case of FIG. 7, the concentration of the gas flowing through each of the passages 5 and 7 is reversed, a low-concentration premixed gas is passed through the gas passage 5, and a high-concentration premixed gas is passed through the gas passage 7. You can let it pass. In this case, the high-concentration premixed gas flame on the flame outlet 4 side is lower than the low-concentration premixed gas flame on the flame outlet 3 side, and the low-concentration premixed gas flame is on the lower root side of the low-concentration premixed gas flame. The gas is mixed with the high-concentration premixed gas through the communication hole 43 to produce a medium-concentration premixed gas, and the medium-concentration premixed gas is mixed with the low-concentration premixed gas flame from below the base of the low-concentration premixed gas flame. Is supplied along the outer peripheral surface of the fuel cell, the lift of the low-concentration premixed gas flame can be more effectively suppressed, and low-noise combustion can be performed.

As shown in FIG. 8, the inside of the bent portion of the bent plate 35, that is, the side wall of the high-concentration premixed gas passage 5 is cut and raised outward to provide a louver-shaped guide 44 as a gas introduction portion. A high-concentration premixed gas is ejected from the cut-and-raised opening 44a along the guide 44 toward the extreme end of the group of the second flame outlets 4, that is, toward the boundary of the second flame formation zone. It is also possible to adopt a configuration in which In this case,
The pre-mixed gas having a high concentration and the pre-mixed gas having a low concentration are mixed upstream of the second flame 4 and the pre-mixed gas having a medium concentration is mixed with the pre-mixed gas having a middle concentration. Because it gushes from the flame,
The low-concentration premixed gas flame becomes easy to burn, and a stable low-concentration premixed gas flame is formed immediately after leaving the flame outlet 4, and also in this case, the lift phenomenon of the low-concentration premixed gas flame is suppressed. Combustion with low noise becomes possible. Since the guide 44 in this embodiment can be formed by press working, the forming operation is easy.

Further, as shown in FIG. 9, metal bent plates 46 and 47 having a U-shaped cross section are formed by press working or the like, and bent plates 46 are provided on the bottom side of the burner case 34 at predetermined intervals. On the other hand, on the upper plate 36 side, the bent plate 47 is fixed in the reverse U-shape by spot welding or the like, and the bent plates 46 and 47 are fixed to the projections 48 and 49. The gas passages 5 and 7 can be formed by using and fitting. In this way, the high-concentration premixed gas supplied to the high-concentration premixed gas passage 5 passes through the gap 50 between the protruding portions 48 and 49 functioning as a gas introduction portion, and the low-concentration premixed gas passage 7.
At the left and right ends, that is, at the boundary of the second flame port formation zone, whereby the low-concentration premixed gas and the high A medium-concentration premixed gas is produced by mixing with the concentration premixed gas, and a medium-concentration premixed gas is ejected from the flame at the end of the group of the second flame outlets 4, and the low-concentration premixed gas is discharged from the flame 4 in the meantime. Since the premixed gas of the concentration is ejected, a medium concentration premixed gas zone is formed along the outer surface of the low concentration premixed gas flame,
Similarly, low-noise combustion in which the lift of the low-concentration premixed gas flame is suppressed can be achieved.

Further, as shown in FIG. 10, the height of the bent plate 35 is reduced, a space 39 is formed between the upper end of the bent plate 35 and the upper plate 36, and the bent plate 35 is bent. A communication hole 3a is formed in the top wall of the portion, and a plurality of first flame ports 3 are formed in a portion of the upper plate 36 facing the communication hole 3a. A configuration in which the second flame port 4 is formed in the upper plate 36 may be employed. In this case, the high-concentration premixed gas ejected upward from the communication hole 3a of the high-concentration premixed gas passage 5 is ejected upward from the first flame port 3 of the upper plate 36. Part of the high-concentration premixed gas ejected from the communication hole 3a of the passage 5 is mixed with the low-concentration premixed gas in the low-concentration premixed gas passage 7, and the medium-concentration premixed gas produced by this mixing is mixed with the second premixed gas. The two flame outlets 4 at the left and right ends of the group of the two flame outlets 4, that is, the boundary between the first flame zone and the second flame zone, squirt upward, and the second flame hole 4 at the central part.
From the low-concentration premixed gas flame, the medium-concentration premixed gas zone is similarly formed from the base side to the outer surface of the low-concentration premixed gas flame. And low-noise combustion can be achieved.

Further, as shown in FIG. 11, a shoulder portion 51 is formed on the upper side of the high-concentration premixed gas passage 5, and a communication hole 52 as a gas introduction portion is formed in the shoulder portion 51 to form a high-concentration premix gas passage. It is also possible to adopt a configuration in which the flame port 3 is provided at the top of the mixed gas passage 5 and at the upper plate 36 facing the top. In this case,
A part of the high-concentration premix gas supplied through the high-concentration premix gas passage 5 is from the communication hole 52 to the low-concentration premix gas passage 7 side, and the first flame port zone and the second flame port Spouts to a position upstream of the boundary with the zone,
A high-concentration premix gas and a low-concentration premix gas mixed with each other are ejected from the flame outlets at the left and right ends of the group. As a result, a low-concentration premixed gas flame is formed from the root side of the low-concentration premixed gas flame along the outer surface of the flame, thereby suppressing the lift of the low-concentration premixed gas flame. In addition, the connection between the high-concentration premixed gas flame and the low-concentration premixed gas flame becomes smooth, and low-noise combustion can be performed in the same manner as in each of the above cases. In this case, the shoulder
51 and the communication hole 52 are easily formed by press working or the like.

Further, as shown in FIG. 12, the first flame port 3 formed in the upper plate 36 on the upper side of the high-concentration premixed gas passage 5 to which the high-concentration premixed gas is supplied is supplied with the high-concentration premixed gas. It may be formed so as to straddle the passage 5 and the low-concentration premixed gas passage 7. With this configuration, the low-concentration premixed gas flowing from both ends of the low-concentration premixed gas passage 7 toward the first flame port 3 and the high-concentration premixed gas passage 5 toward the flame port 3 are formed. Since the high-concentration premixed gas that is ejected mixes with the low-concentration premixed gas flame and blows out to its outer surface from the base side, similarly, the medium-concentration A premixed gas zone is formed, thereby suppressing the low-concentration premixed gas flame lift phenomenon and enabling low-noise combustion as in the above cases.

FIG. 13 shows a burner device of another embodiment having a different form. The burner device of each of the above embodiments has a flat flame forming surface (combustion surface) formed with the flame outlets 3 and 4, but the burner device of this embodiment has a first burner row 61 The second burner row 62 is disposed so as to face in a substantially V shape, and the flame ports 3 or the flame ports 4 face each other. The other configuration is the same as that of each of the above-described embodiments, and the internal structure of each of the burner rows 61 and 62 is the same as that of each of the above-described embodiments. In this case, the flame outlets facing each other may be configured such that the flame outlets 3 and 4 face each other.

By arranging the burner rows 61 and 62 in a V-shape in such a manner, the exhaust gas combusted by each burner row 61 and 62 rises upward along the V-shaped slope of the combustion surface. , A negative pressure zone is formed in the central portion of the V-shape, and a downward exhaust gas flow is generated in the central portion, and the flow of exhaust gas recirculation allows slow combustion to be effectively performed, thereby increasing nitrogen oxides. Clean combustion with less generation of methane can be achieved. In addition, by arranging the burner rows 61 and 62 in a V-shape, the number of the flame ports 3 and 4 can be increased, and the flame port load of combustion becomes smaller, so that the combustion noise is further reduced. .

It should be noted that the present invention is not limited to the above embodiments, but can take various embodiments.
For example, in each of the above embodiments, a mesh or the like is provided over a boundary region between the high-concentration premixed gas flame and the low-concentration premixed gas flame, and the high-concentration premixed gas ejected from the flame ports 3 and 4 is provided. The low-concentration premixed gas may be made to interfere to further promote the mixing.

[0034]

According to the present invention, there is provided a burner case, an upper plate for covering the upper opening of the burner case, and a bent plate for partitioning the burner case into a low-concentration premixed gas passage and a high-concentration premixed gas passage. Since both are composed of metal plates, they can be easily formed by press working or the like, and the workability of device manufacturing can be greatly improved.

Further, since the flame port formed on the upper plate can be formed by press working, the dimensional accuracy of the flame port is excellent, and the flame port can be formed as instructed by the design. Reliability can be improved.

Further, as described above, the flame port can be formed with high dimensional accuracy as instructed by the design, and the apparatus can be easily manufactured. Therefore, it is possible to quickly respond to a change in the specification of the apparatus. Furthermore, it is surrounded by the burner case and the upper plate
High-concentration premixed gas passages with bent plates throughout the internal space
And a low-concentration premixed gas passage, and a burner case
From inside the burner case
High-concentration premixed gas in the
And a low-concentration premixed gas.
A premixing chamber for producing mixed gas is installed inside the burner case.
Burner case is much smaller than
Can be

Further, the first flame port is arranged so as to surround the second flame port, or the second flame group provided continuously is surrounded by the first flame port zone. In addition, a high-concentration premixed gas is introduced into the low-concentration premixed gas passage in the boundary region of the second flame zone and upstream of the boundary at the boundary and upstream of the flame. In a configuration in which a medium-concentration premixed gas obtained by mixing a mixed gas and a low-concentration premixed gas is jetted to the boundary region of the flame outlet, a high-concentration premixed gas is surrounded around the low-concentration premixed gas flame. The mixed gas flame wraps around, improving the transferability and flame holding of the high-concentration premixed gas flame and the low-concentration premixed gas flame, and suppressing the lift of the low-concentration flame, Clean combustion with good combustion performance and low noise is possible. Furthermore, a turning force is applied by a turning guide.
The air collides with the fuel gas and swirls the air and fuel gas.
A swirl mixer for producing a high-concentration premixed gas by mixing
Other swirls that produce low concentration premixed gas as well as swirl mixers
A premixing device provided with a multi-stage mixer
Fuel gas and air in short passage sections
Uniform mixing, uniform fuel gas and air
High-concentration premixed gas and low-concentration premixed gas
The high-concentration premixed gas passage inside the burner case and the low
It can be delivered to a concentration premixed gas passage. These high
Sent to the low concentration premixed gas passage and the low concentration premixed gas passage
The premixed gas burns, so the air and fuel gas
Combustion performance can be greatly improved by proper mixing
You. In addition, as described above, fuel gas and air
Can be uniformly mixed with
Mold can be achieved and, as described above,
The size of the premixing device can be reduced
Combined with the downsizing of the burner case, the
Dramatic miniaturization can be promoted.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of a premixing device part of the burner device of the embodiment.

FIG. 3 is an explanatory view of a disassembled state of a swirl mixer provided in the premixing device.

FIG. 4 is a sectional view showing another embodiment of the gas passage forming portion inside the burner device.

FIG. 5 is an explanatory view showing still another configuration example of the gas passage inside the burner device.

FIG. 6 is an explanatory view of a burner device of a configuration example in which a second flame group for ejecting a low-concentration premixed gas is surrounded by a first flame port of a high-concentration premixed gas.

FIG. 7 is an explanatory cross-sectional view of an embodiment in which the upper plate is bent in the same manner as the bent plate to define a high concentration premixed gas passage and a low concentration premixed gas passage.

FIG. 8 is an explanatory diagram of an embodiment in which a louver-type cut-and-raised portion is provided on a side wall of a gas passage through which a high-concentration premixed gas passes.

FIG. 9 is an explanatory view of an embodiment in which a burner case side and an upper plate side on which a flame port is formed are of a fitting type.

FIG. 10 is an explanatory view showing an embodiment of a type in which a high concentration premixed gas is introduced from a gas passage of a high concentration premixed gas into a gas passage of a low concentration premixed gas.

FIG. 11 is a sectional view of a high-concentration premixed gas passage formed in a T-shape, and a high-concentration premixed gas is introduced from the T-shaped shoulder to the low-concentration premixed gas passage side. FIG.

FIG. 12 is an explanatory view showing an embodiment of a burner device in which a first flame port for ejecting a premixed gas having a high concentration is formed so as to straddle a high concentration premixed gas passage and a low concentration premixed gas passage. is there.

FIG. 13 is a perspective view showing the appearance of another embodiment of the burner device in which a pair of burner rows are opposed to each other in a substantially V shape.

FIG. 14 is an explanatory diagram of a conventional burner device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burner 3 First flame 4 Second flame 5 High concentration premixed gas passage 7 Low concentration premixed gas passage 34 Burner case 35, 42, 46, 47 Bending plate 36 Upper plate

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F23D 14/08 F23C 11/00 330

Claims (5)

(57) [Scope of request for utility model registration] 1. A burner case having a box-shaped upper surface made of a metal plate, the upper surface opening of the burner case being closed by an upper plate made of a metal plate, and an entire internal space surrounded by the burner case and the upper plate. Is introduced from outside the burner case by a bent plate formed by bending a metal plate.
It is partitioned and formed on the low concentration premixed gas passage low concentration premixed gas introduced from the outside of the high concentration premixed gas passage and the burner casing through which the high premixed gas concentration passes, the upper plate Is a burner device in which one or more first flame ports communicating with the high-concentration premixed gas passage and one or more second flame ports communicating with the low-concentration premix gas passage are formed adjacent to each other. (2) High-concentration premixed gas flow inside the burner case
Premixed gas in each of the
The premixing device delivered from the outside of the
Around the area where the gas ejection holes communicating with the gas supply passages are formed
On the air that is applied from outside
Air and fuel gas collide with the fuel gas
Equipped with a swivel guide to swirl and mix premixed gas
Swirl mixer and the gas supply passage further downstream thereof
Provided around gas vents communicating with
Swirling gas that creates swirling force by applying swirling force to air
To another multistage mixer
And the upstream swirl mixer and the downstream swirl mixer.
One of the devices creates a high concentration of premixed gas and burners
Into the high-concentration premixed gas passage inside
Low preconcentration gas inside the burner case
It is characterized in that it is configured to send out to the premixed gas passage
The burner device according to claim 1, wherein 3. The burner device according to claim 1, wherein the first flame port is arranged so as to surround the second flame port. 4. The plurality of second flame ports are formed in a dense group, and the plurality of second flame ports are continuously provided through a first flame port zone therebetween. 1 or claim 2 or
The burner device according to claim 3 . 5. A high-concentration premix gas in a high-concentration premix gas passage is provided in the burner case in a boundary region of a formation zone of a second flame port and upstream of the boundary at the upstream of the flame port. 5. The burner device according to claim 1, wherein a gas passage portion for introducing into the low-concentration premixed gas passage is formed.