JP3460523B2 - Concentrated gas burner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention discharges a fresh gas having a large amount of air from a main flame port and burns it as a main flame, and a rich gas having a small amount of air adjacent to the outside of the main flame port. The present invention relates to a low NO _x concentration type gas burner which is discharged from the mouth and burned as sleeve fire.

[0002]

2. Description of the Related Art Conventionally, there has been provided a rich-lean gas burner which realizes low NO _x by burning a main flame resulting from the burning of lean gas and a sleeve fire resulting from burning of rich gas side by side. In this conventional light and shade type gas burner,
One gas nozzle is arranged in the main passage for supplying the light gas to the main flame port where the main flame is formed, and the fuel gas supplied from the gas nozzle is used to adjust the light gas, while the sleeve is provided. One gas nozzle is newly arranged also in the sub passage where the fire is formed, and the rich gas is adjusted by using the fuel gas supplied from the newly arranged gas nozzle. However, in the above-mentioned conventional concentration type gas burner, since two gas nozzles are required, the number of parts is increased and the cost becomes high, and the fuel gas is branched and supplied to the two gas nozzles. There was a problem such as

Therefore, the inventors of the present invention have provided a density type gas burner which solves the above problems in Japanese Patent Application No. 9-185747, and the contents of the invention will be briefly described with reference to FIG. FIG. 7 shows an overall view of the concentration type gas burner,
(A) is a plan view, (B) is a front view, (C) is a right side view,
(D) is an AA sectional view. The concentration gas burner is composed of a main constituent 1 and a sub constituent 2. The main structural body 1 is composed of a pair of plate bodies 10 and 10 having irregularities, and the pair of plate bodies 10 and 10 are combined to form the main structural body 1 and at the side end portion of the structural body 1. A gas / air receiving port 1a is formed, a main passage 1b is formed in the internal space, and a main flame port 1c is formed in the upper edge portion. On the other hand, the sub-construction body 2 is also composed of a pair of plate bodies 20 and 20 on which irregularities are formed, and when each of the plate bodies 20 is fitted to the outer surface from both sides of the main construction body 1, the outer surface of the main construction body 1 is formed. Between sub passages 2b and 2b, respectively
And sub-flame ports 2c adjacent to the main flame port 1c are formed at the upper ends thereof. A single gas nozzle 4 is arranged facing the front of the gas / air receiving port 1a, and a gas branching mechanism 3 is formed inside the gas / air receiving port 1a. This gas branching mechanism 3 is in a state in which the fuel gas received from the gas nozzle 4 into the gas / air receiving port 1a is not yet mixed with air, that is, in the state of rich gas, the sub passages 2b on both the left and right sides of the main structure 1. , 2b, which is provided with a bulging portion 30 which bulges horizontally in a band shape in the region of the gas / air receiving port 1a along the fuel gas blowing line from the gas nozzle 4, and the bulging portion 30
By providing one or a plurality of rich gas branch ports 3a communicating with the sub-passages 2b, 2b, the sub-passage passes through the rich gas branch port 3a in a rich state where the fuel gas is not mixed with air yet. It is configured to branch into 2b and 2b. Further, the fuel gas fed from the gas nozzle 4 enters the gas / air receiving port 1a, and along with the flow of this gas, air is also sucked into the gas / air receiving port 1a from the surroundings, and most of it flows through the main passage 1b. Reach main flame mouth 1c. Then, a part of the fuel gas is branched by the gas branching mechanism 3 to enter the sub passages 2b, 2b and reach the sub flame port 2c. According to the density type gas burner having such a configuration, since only one gas nozzle is used, it is possible to reduce the number of parts, and there are manufacturing and cost advantages such as simplification of piping. The problems of the conventional concentration type gas burner have already been solved.

[0004]

However, in the above-mentioned concentration type gas burner, as shown in FIG. 8 (BB sectional view of the gas branching mechanism 3), the pair of rich gas branching ports 3a, 3a are separated from each other. , The pair of rich gas branch ports 3a, the gas pressure in the vicinity of the inlet of the 3a is not likely to be equal, it is not possible to maintain the balance of the gas flow rate, as a result to the sub passage 2b side on the left and right sides of the main passage 1b There was a fear that the fuel gas could not be distributed evenly.

Therefore, the present invention eliminates the inconvenience in the above-mentioned concentration type gas burner, and is constructed so that the concentration of the concentrated gas and the concentration of the light gas can be favorably adjusted by using one gas nozzle, and the gas is evenly distributed to the sub passage side. The challenge is to provide a light and shade type gas burner.

[0006]

In order to achieve the above object, the concentration type gas burner according to the present invention is designed to discharge a large amount of fresh gas carried through a main passage from a main flame port at the upper end. A rich-concentration gas burner that burns as a flame and discharges a rich gas with a small amount of air conveyed through the sub-passage from the sub-flame port adjacent to the outside of the main flame port to burn as sleeve fire. There is a main constituent body that constitutes the main flame opening and the main passage, and a gas / air receiving opening that receives the fuel gas from the gas nozzle and the air from the surroundings, and the sub-components on both outer sides of the main constituent body. A gas that guides a part of the fuel gas that has been introduced into the gas / air receiving port to the sub-passage as a concentrated gas that is not yet mixed with air, and a sub-structure that constitutes the flame port and the sub-passage. Air inlet And a gas branching mechanism formed by utilizing a part of the inner wall of the gas / air receiving mechanism, the gas branching mechanism centering the inner wall portion of the gas / air receiving port corresponding to the passage center portion of the introduced fuel gas from both sides. A pair of bulging portions that are bulged toward each other and that overlap the bulging top portions, and a pair of concentrated gas that is provided in the bulging inclined portion immediately before the bulging top portion and that communicates with the sub-passage side And a part of the fuel gas introduced into the gas / air receiving port is evenly distributed to the sub passages on both the left and right sides and fed from the rich gas holes. This is the first feature.

In addition to the first feature of the concentration type gas burner of the present invention, a communication hole for directly communicating the left and right sub-passages is provided at the bulging top of the bulging portion constituting the gas branching mechanism. The second characteristic is that

Further, the concentration type gas burner of the present invention discharges the light gas having a large amount of air carried through the main passage from the main flame port at the upper end to burn it as a main flame, and at the same time, conveys it through the sub passage. A rich and lean gas burner in which a rich gas with a small amount of air coming out is discharged from an auxiliary flame outlet adjacent to the outside of the main flame orifice and burned as sleeve fire, which constitutes the main flame orifice and the main passage. And a main constituent body that constitutes a gas / air receiving port that receives the fuel gas from the gas nozzle and air from the surroundings, and a sub constituent body that constitutes the auxiliary flame port and the sub passage on both outer sides of the main constituent body. , Part of the inner wall in the gas / air receiving port that guides a part of the fuel gas introduced into the gas / air receiving port to the sub passage as a concentrated gas that has not yet been mixed with air Formed And a gas branching mechanism for diverging the inner wall portion of the gas / air receiving port corresponding to the passage center portion of the introduced fuel gas from both sides toward the center, and the bulging top portion thereof. A pair of bulging portions, a gas retaining portion provided immediately before the bulging top portion and having a space for temporarily retaining the introduced fuel gas, and the gas retaining portion side and the left and right auxiliary passages. And a pair of rich gas holes provided in the gas retention portion so as to communicate with each other, and of the fuel gas introduced into the gas / air receiving port from the rich gas hole to the sub passage side. A third feature is that a part of the rich gas holes is evenly distributed and sent to the left and right auxiliary passages.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below. The basic structure thereof is the same as that of the concentration type gas burner shown in FIG. 7, and therefore detailed description thereof will be omitted, and a different structure will be described with reference to FIGS. 1 and 2. FIG. 1 shows a gas branching mechanism, (A) is an enlarged front view,
FIG. 2B is a sectional view taken along line BB in FIG. 1A, and FIG. 2 is an explanatory diagram for explaining a gas flow state in FIG. 1B.

As shown in FIG. 7, the basic structure of the concentration type gas burner according to the first embodiment of the present invention is that the main flame port 1c and the main passage 1b are constituted, and the fuel gas from the gas nozzle 4 and its surroundings are formed. A main constituent body 1 which constitutes a gas / air receiving opening 1a for receiving air, and a sub constituent body 2 which constitutes the sub flame openings 2c and the sub passages 2b, 2b on both outer sides of the main constituent body 1.
And a part of the fuel gas introduced into the gas / air receiving port 1a is introduced into the sub passages 2b, 2b as a concentrated gas that is not yet mixed with air, and the gas / air receiving port 1c
And a gas branching mechanism 3 formed by utilizing a part of the inner wall.

Here, as shown in FIG. 1, the gas branching mechanism 3 bulges the inner wall portion of the gas / air receiving port 1a corresponding to the passage center portion of the introduced fuel gas from both sides toward the center. The bulging portions 5 and 5 are formed by superimposing the bulging top portions 6 and 6 of the bulging portions 5 and 5 on the bulging inclined portions 6a and 6a immediately before the bulging top portions 6 and 6, respectively. The dense gas holes 6b and 6b are formed, respectively, and the rich gas holes 6b and 6b are configured to be able to communicate with the sub passages 2b and 2b side, respectively. In the concentration type gas burner according to the first embodiment, however, the gas branch mechanism 3 is particularly configured as described above, so that the gas nozzle 4 is connected to the gas / air receiving port 1a.
A part of the fuel gas introduced into the inside first flows along the bulging inclined portions 6a, 6a as shown by the arrow in FIG. And the above-mentioned gas gathers at one place just before the bulging tops 6 and 6, and the rich gas holes 6b and 6b provided just before the bulging tops 6 and 6 are provided.
Since the pressure distributions are almost equal in the vicinity (the broken line portion indicated by the symbol F in the figure), the rich gas holes 6b, 6b to the sub passages 2b, 2b
The gas is evenly distributed and enters the side, and is eventually burned as sleeve fire from the secondary flame port 2c in a rich gas state without being mixed with air. In addition, most of the fuel gas is a gas rich hole provided immediately before the bulging tops 6 and 6.
6b, 6b rises without entering, enters a main passage 1b side while mixing a large amount of air, and is burned as a light gas from the main flame port 1c as shown in FIG.

As described above, according to the concentration type gas burner according to the first embodiment, the fuel gas introduced into the gas branching mechanism 3 is concentrated gas holes 6b, 6b provided immediately before the bulging tops 6, 6.
It is possible to evenly distribute the concentrated gas into the sub-passages 2b and 2b side to flow into the secondary passages 2b and 2b, and to combust it as a stable sleeve fire.

Next, a second embodiment of the present invention will be described. The basic structure thereof is the same as that of the concentration type gas burner shown in FIG. 7, so detailed description thereof will be omitted, and a different structure will be described with reference to FIGS. 3 and 4. Figure 3
Shows a gas branching mechanism, (A) is an enlarged front view, (B) is a sectional view taken along line BB of (A), and FIG. 4 is an explanation for explaining a state of gas flow in (B) of FIG. It is a figure.

As shown in FIG. 7, the basic structure of the concentration gas burner according to the second embodiment of the present invention is also substantially the same as the basic structure of the concentration gas burner according to the first embodiment. That is, the main constituent body 1 which constitutes the main flame port 1c and the main passage 1b and also constitutes the gas / air receiving port 1a which receives the fuel gas from the gas nozzle 4 and the air from the surroundings.
And the auxiliary flame port 2c and the auxiliary passage on both outer sides of the main structure 1.
2b, 2b, and a portion of the fuel gas introduced into the gas / air receiving port 1a is a concentrated gas in which mixing with air has not yet proceeded, but the sub passages 2b, 2b And a gas branching mechanism 3 formed by utilizing a part of the inner wall of the gas / air receiving port 1c leading to the.

Here, as shown in FIG. 3, the gas branching mechanism 3 bulges the inner wall portion of the gas / air receiving port 1a corresponding to the passage center portion of the introduced fuel gas from both sides toward the center. The bulging portions 5 and 5 are formed by superimposing the bulging top portions 6 and 6 of the bulging portions 5 and 5 on the bulging inclined portions 6a and 6a immediately before the bulging top portions 6 and 6, respectively. The dense gas holes 6b and 6b are formed, respectively, and the rich gas holes 6b and 6b are configured to be able to communicate with the sub passages 2b and 2b side, respectively. In addition to these structures, the left and right auxiliary passages 2b,
A communication hole 7 communicating with 2b is newly formed. Then second
In the concentration type gas burner according to the embodiment of the present invention, since the gas branching mechanism 3 is particularly configured as described above, a part of the fuel gas introduced from the gas nozzle 4 into the gas / air receiving port 1a is indicated by an arrow in FIG. As shown, first the swelling sloped portion 6a,
Flow along 6a. And the gas is bulged top 6,
6 Just before 6 gathered in one place, bulging sloped parts 6a, 6a
Since the pressure distributions are almost equal in the vicinity of the rich gas holes 6b and 6b provided in the above, the gas is uniformly distributed and enters from the rich gas holes 6b and 6b to the sub passages 2b and 2b. Then, the gas that has entered the side of the sub passage 2b, 2b, the sub passage 2b,
Even if the gas pressure is different in 2b, the gas automatically moves from the higher gas pressure to the lower gas pressure through the communication hole 7, so that there is no difference between the sub passages 2b and 2b. The gas pressure is always kept even. Then, the gas that has entered the sub passages 2b, 2b is finally burned as sleeve fire from the sub flame port 2c in a rich gas state without being mixed with air. Further, most of the fuel gas rises without entering the rich gas holes 6b, 6b, enters the main passage 1b side while mixing a large amount of air, and is burned as a light gas from the main flame port 1c.

As described above, according to the concentration-type gas burner according to the second embodiment, the fuel gas introduced into the gas branching mechanism 3 is concentrated gas holes 7, 7 provided in the bulging inclined portions 6a, 6a.
From the sub-passages 2b, 2b can be evenly distributed and flowed into the sub-passages 2b, 2b, and even if there is a difference in gas pressure between the sub-passages 2b, 2b, the gas pressure is Since the gas automatically moves to the lower side through the communication hole 7, the gas pressure between the sub-passages 2b and 2b is maintained more evenly, and flows along the sub-passage 2b in a predetermined route, and finally, It can be burned as a stable sleeve fire from the secondary flame outlet 2c.

Further, a third embodiment of the present invention will be described. The basic structure thereof is the same as that of the concentration type gas burner shown in FIG. 7, so a detailed description thereof will be omitted and a different structure will be described with reference to FIGS. 5 and 6. Figure 5
Shows a gas branching mechanism, (A) is an enlarged front view, (B) is a sectional view taken along line BB of (A), and FIG. 6 is an explanation for explaining the state of gas flow in (B) of FIG. It is a figure.

As shown in FIG. 7, the basic structure of the concentration gas burner according to the third embodiment of the present invention is also substantially the same as the basic structure of the concentration gas burner according to the first embodiment. That is, the main constituent body 1 that constitutes the main flame outlet 1c and the main passages 2b and 2b and also constitutes the gas / air receiving opening 1a that receives the fuel gas from the gas nozzle 4 and the air from the surroundings, and the main constituent body 1 The sub-flame 2c and the sub-structures 2 forming the sub-passages 2b and 2b on both outer sides of the fuel gas and a part of the fuel gas introduced into the gas / air receiving port 1a are still mixed with air. Not the rich gas but the sub passage 2b,
The gas / air receiving port 1c leading to 2b is provided with a gas branching mechanism 3 formed by utilizing a part of the inner wall of the gas / air receiving port 1c.

Here, in the gas branching mechanism 3, as shown by an arrow in FIG. 5, the inner wall portion of the gas / air receiving port 1a corresponding to the passage center portion of the introduced fuel gas is directed from both sides toward the center. The bulging portions 5 and 5 are formed by bulging, and the bulging apex portions 6 and 6 of the bulging portions 5 and 5 are overlapped with each other, and are newly introduced immediately before the bulging apex portions 6 and 6. A gas retention part 8 having a space for temporarily retaining the fuel gas is formed, and the gas retention part side 8 is formed.
And a pair of rich gas holes 9 and 9 are provided symmetrically on the inner wall of the gas / air receiving port 1a that constitutes the gas retaining portion 8 so as to connect the left and right sub-passages 2b and 2b sides, respectively. . In the concentration type gas burner according to the third embodiment, however, the gas branching mechanism 3 is particularly configured as described above, so that a part of the fuel gas introduced from the gas nozzle 4 into the gas / air receiving port 1a is As indicated by the arrow in 6,
First, it flows toward the gas retention section 8. Then, the gas is filled in the gas retention portion 8, and the pressure distribution inside the gas retention portion 8 becomes uniform, and at the same time, the gas is distributed from the concentrated gas holes 9, 9 to the left and right auxiliary passages 2b, 2b in equal amounts. It flows in. Then, the above gas that has entered the sub passages 2b, 2b is finally burned as sleeve fire from the sub flame port 2c in a rich gas state without being mixed with air. Further, most of the fuel gas rises without entering the rich gas holes 9, 9 and enters the main passage 1b side while being mixed with a large amount of air, and is burned as a light gas from the main flame port 1c.

As described above, according to the concentration gas burner according to the third embodiment, a part of the fuel gas introduced from the gas nozzle 4 into the gas / air receiving port 1a and flowing into the gas branch mechanism 3 is temporarily When the gas enters the gas retention portion 8 and fills the gas retention portion 8 and the gas pressure distribution becomes uniform in the portion surrounded by the broken line F in FIG. The concentrated gas, which is distributed in equal amounts to the side 2b and flows in, flows through the sub passages 2b and 2b in a predetermined route, and can finally be burned as stable sleeve fire from the sub flame outlet 2c. Further, the fuel gas that cannot flow into the rich gas holes 9 and 9 and overflows is directly mixed with a large amount of air together with most of the fuel gas that has entered the main passage 1b side without directly flowing into the gas retention portion 8. Burned as a light gas from the flame tip 1c.

[0021]

According to the present invention, which has the above-described structure,
According to the concentration type gas burner described in (1), the light gas with a large amount of air conveyed through the main passage is discharged from the main flame port at the upper end and burned as the main flame, and is also conveyed through the sub passage. A rich / lean gas burner in which a rich gas with a small amount of incoming air is discharged from an auxiliary flame port adjacent to the outside of the main flame port to burn as sleeve fire, and the main flame port and the main passage are configured. A main constituent member for forming a gas / air receiving port for receiving fuel gas from the gas nozzle and air from the surroundings, and a sub constituent member for forming the auxiliary flame port and the sub passage on both outsides of the main constituent member, A part of the fuel gas that has been introduced into the gas / air receiving port is led to the above-mentioned sub passage as a concentrated gas that has not yet been mixed with air. Gas branching machine The gas branching mechanism is provided with swelling the inner wall portion of the gas / air receiving port corresponding to the passage center portion of the introduced fuel gas from both sides toward the center, and stacking the swelling tops. Since there is provided a pair of bulging portions and a pair of concentrated gas holes provided in the bulging slope portion immediately before the bulging top portion and communicating with the sub passage side, the inside of the gas / air receiving port A portion of the fuel gas introduced into the above can be distributed evenly to the sub-passages on both left and right sides from each of the above-mentioned rich gas holes and sent in, and the rich gas flowing along the sub-passages in a predetermined route is finally fed. It can be burned as a stable sleeve fire from the secondary flame mouth. In addition, the fuel gas introduced into the gas / air receiving port using one gas nozzle is guided by the gas branching mechanism as part of the concentrated gas from the sub-passage to the sub-flame port and burned as sleeve fire. As a result, since it can be guided from the main passage to the main flame port and burned as a main flame, it is not necessary to prepare two gas nozzles for the main flame and the sleeve fire, and the cost can be reduced. Further, since it is not necessary to supply the fuel gas to the two gas nozzles by branch piping, there is no problem of cost increase in piping. Further, according to the concentration type gas burner of claim 2, in addition to the effect of claim 1, the left and right sub-passages are directly communicated with the bulging top of the bulging portion forming the gas branching mechanism. Since the communication hole is newly added, the fuel gas introduced into the gas branching mechanism can be evenly distributed and flowed into the sub passage side from the rich gas hole provided in the bulging inclined portion. However, when the gas pressure between the sub-passages is different, the gas automatically moves from the higher gas pressure to the lower gas pressure through the communication hole, so that the gas pressure between the sub-passages is further increased. It is maintained evenly, flows in the predetermined passage along the sub passage side, and finally can be burned as more stable sleeve fire from the sub flame port. Further, according to the concentration type gas burner of claim 3, the light gas having a large amount of air carried through the main passage is discharged from the main flame port at the upper end to be burned as a main flame, and at the same time, through the sub passage. A concentrated gas burner configured to discharge a rich gas with a small amount of air carried from an auxiliary flame outlet adjacent to the outside of the main flame orifice to burn as a sleeve fire. And a sub-configuration that constitutes the main constituent body that constitutes a gas / air receiving opening for receiving fuel gas from the gas nozzle and air from the surroundings, and sub-flame openings and sub-passages on both outer sides of the main constituent body. Part of the inner wall in the gas / air receiving port that guides the body and part of the fuel gas that has been introduced into the gas / air receiving port to the sub-passage as concentrated gas that has not yet been mixed with air Then formed And a gas branching mechanism for diverging the inner wall portion of the gas / air receiving port corresponding to the passage center portion of the introduced fuel gas from both sides toward the center, and the bulging top part thereof. A pair of bulging portions, a gas retaining portion provided immediately before the bulging top portion and having a space for temporarily retaining the introduced fuel gas, and the gas retaining portion side and the left and right auxiliary passages. And a pair of rich gas holes provided in the gas retention portion so as to communicate with each other, and of the fuel gas introduced into the gas / air receiving port from the rich gas hole to the sub passage side. Since a part is configured to be evenly distributed and sent to the sub-passages on both left and right sides from each of the rich gas holes, the fuel gas introduced into the gas branching mechanism enters the gas retention section and Pressure in the retention area Since they can be evenly distributed from the rich gas holes to the sub passage side in the same condition, the rich gas flowing along the predetermined passage along the sub passage side is burned as stable sleeve fire from the sub flame outlet. be able to. Again 1
The fuel gas introduced into the gas / air receiving port using two gas nozzles is partially burned as a sleeve fire by guiding a part of the fuel gas from the secondary passage to the secondary flame port by the gas branching mechanism,
Since another gas can be introduced as a fresh gas from the main passage to the main flame port and burned as a main flame, it is not necessary to prepare two gas nozzles for the main flame and the sleeve fire, thereby reducing the cost. be able to. Further, it is not necessary to supply the fuel gas to the two gas nozzles by branch pipes, and there is no problem of cost increase on the pipes.

[Brief description of drawings]

FIG. 1 is an enlarged front view and an enlarged sectional view of a gas branching mechanism of a concentration type gas burner showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a gas flow in the gas branching mechanism of the concentration gas burner according to the first embodiment of the present invention.

3A and 3B are an enlarged front view and an enlarged sectional view of a gas branching mechanism of a concentration gas burner showing a second embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating a gas flow in a gas branching mechanism of a concentration gas burner according to a second embodiment of the present invention.

5A and 5B are an enlarged front view and an enlarged sectional view of a gas branching mechanism of a concentration gas burner showing a third embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating a gas flow in a gas branching mechanism of a concentration type gas burner according to a third embodiment of the present invention.

FIG. 7 is an enlarged front view showing the overall structure of the concentration type gas burner showing the first to third embodiments of the present invention.

FIG. 8 is an explanatory diagram illustrating a gas flow in a gas branching mechanism of a conventional concentration gas burner.

[Explanation of symbols]

1 main constituent 1a Gas / air inlet 1b Main passage 1c Main flame mouth 2 Sub-construction 2b Sub passage 2c Secondary flame mouth 3 gas branch mechanism 5 bulge 6 bulge top 6a Bulging slope 6b Concentrated gas hole 7 communication holes 8 gas retention section 9 Concentrated gas hole

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Kameyama, 93, Edo-machi, Chuo-ku, Kobe-shi, Hyogo In Noritsu Co., Ltd. (72) Inouo Nagai, 93, Edo-cho, Chuo-ku, Kobe, Hyogo 72) Inventor Takahiro Matsuda 93 Edo-machi, Chuo-ku, Kobe, Hyogo Prefecture Noritsu Co., Ltd. (72) Inventor Ryoji Kona 93, Edo-cho, Chuo-ku, Kobe, Hyogo Prefecture Noritsu Co., Ltd. (56) Reference JP 7 -19422 (JP, A) JP-A-6-313519 (JP, A) JP-A-8-5023 (JP, A) Actually developed 50-111042 (JP, U) (58) Fields investigated (Int.Cl) . ^7, DB name) F23D 14/02 - 14/08 F23D 14/62 - 14/64 F23C 11/00 329 - 330

Claims (3)

(57) [Claims] 1. A small amount of air carried through a sub-passage is discharged from a main flame port at the upper end to burn a fresh gas with a large amount of air carried through a main passage to burn it as a main flame. A rich / lean gas burner in which rich gas is discharged from an auxiliary flame port adjacent to the outside of the main flame port and burned as sleeve fire, which constitutes the main flame port and main passage and fuel gas from a gas nozzle. And a main constituent member that configures a gas / air receiving port that receives air from the surroundings, and a sub constituent member that configures the auxiliary flame port and the sub passage on both outer sides of the main constituent member,
Part of the fuel gas that has been introduced into the gas / air receiving port is introduced as a concentrated gas that has not yet been mixed with air to the sub-passage, using part of the inner wall of the gas / air receiving port. The gas branching mechanism comprises: a gas branching mechanism that expands the inner wall portion of the gas / air receiving port corresponding to the passage center portion of the introduced fuel gas from both sides toward the center, and The gas / air receiving part is provided with a pair of bulging portions formed by overlapping the bulging portions and a pair of concentrated gas holes provided in the bulging inclined portion immediately before the bulging apex portion and communicating with the sub passage side. A concentration type gas burner, characterized in that a part of the fuel gas introduced into the mouth is uniformly distributed and sent to the sub-passages on both the left and right sides from the respective concentration gas holes. 2. The concentration type gas burner according to claim 1, wherein a communication hole that directly communicates between the left and right sub-passages is provided at the bulging top of the bulging portion that constitutes the gas branching mechanism. . 3. A small amount of air carried through the sub-passage is discharged from a main flame port at the upper end to burn a fresh gas with a large amount of air carried through the main passage to burn it as a main flame. A rich / lean gas burner in which rich gas is discharged from an auxiliary flame port adjacent to the outside of the main flame port and burned as sleeve fire, which constitutes the main flame port and main passage and fuel gas from a gas nozzle. And a main constituent member that configures a gas / air receiving port that receives air from the surroundings, and a sub constituent member that configures the auxiliary flame port and the sub passage on both outer sides of the main constituent member,
Part of the fuel gas that has been introduced into the gas / air receiving port is introduced as a concentrated gas that has not yet been mixed with air to the sub-passage, using part of the inner wall of the gas / air receiving port. The gas branching mechanism comprises: a gas branching mechanism that expands the inner wall portion of the gas / air receiving port corresponding to the passage center portion of the introduced fuel gas from both sides toward the center, and A pair of bulging portions formed by overlapping the bulging portions, a gas retention portion provided immediately before the bulging top portion and having a space capable of temporarily retaining the introduced fuel gas, and the gas retention portion side and the left and right sides. A pair of rich gas holes provided in the gas retention portion so as to communicate with the sub passage side, respectively, and the fuel introduced into the gas / air receiving port from the rich gas hole to the sub passage side. Part of the gas is above Shading expressions gas burner, characterized in that it is configured to be fed is uniformly distributed on the sub-passage side of the left and right sides from the rich gas holes.