JPH0759965B2 - Burner - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner that is small in size and has high calories.

2. Description of the Related Art Conventionally, a high load burner is known in which gas and air are forcibly supplied and burned. For example, Jikkou 58-23051
In the burner shown in No. 5, a burner plate is provided with a flame port for ejecting combustion gas and a secondary air hole for ejecting secondary air for combustion to perform forced combustion on the plate. However, in this burner, the secondary air holes and the flame outlets are arranged in the same number in a staggered manner, so that the supply distribution of the secondary air on the plate becomes rough and non-uniform, and the secondary air contacts the combustion flame. Is not good. Therefore, although the secondary air is supplied to the burner in a sufficient amount, the amount of secondary air actually contributing to combustion is small. In particular, in this burner, the opening area of the secondary air holes is made larger than that of the flame openings, so that the tendency is even stronger if the distribution of the secondary air is uneven. Therefore, the amount of secondary air supplied to the burner must be naturally increased (the excess air ratio is large), and this time, the blast noise becomes a problem.

Therefore, as shown in FIG. 7, a burner has been developed in which the number of secondary air holes (4 ') is increased as compared with the flame port (3') to make the distribution of secondary air uniform. .

Problems to be Solved by the Invention However, although the number of the secondary air holes (4 ') with respect to the flame port (3') is increasing, the stability of the combustion flame and the transfer performance during ignition are poor. Because, by increasing the number of secondary air holes (4 '), the secondary air holes (4') are arranged between the adjacent flame ports (3 '),
This is because the air ejected from the secondary air holes (4 ') acts as an air curtain, and interrupts the mutual connection between the bases of the adjacent combustion flames.

Therefore, an object of the present invention is to solve the above-mentioned problems and achieve both good supply of secondary air, stability of combustion flame, and improvement of fire transfer performance during ignition.

MEANS FOR SOLVING THE PROBLEMS The present invention is provided on a large number of protruding cylindrical burner ports (1) arranged in a row in a burner body (A) and a large number of flame holes (2) of the burner ports (1) are provided. Flame tip (3) and secondary air hole (4)
In a burner formed by superimposing and fixing plate plates (5) with holes, the number of secondary air holes (4) in the plate plate (5) is made larger than the number of flame openings (3), and the plate is Each of the secondary air holes (4) of the plate (5) has a smaller opening area than each of the flame openings (3), and the lines (x) and (y) connecting the shortest adjacent flame openings (3) are connected to each other. As an axis of symmetry, the line (x),
(Y) The gist is not to provide on the line.

Action In the burner of the present invention having the above-described configuration, since the secondary air hole (4) is not provided between the flame ports (3) adjacent to each other at the shortest position, the secondary air flow causes the flame port at the time of ignition. (3) does not disturb the fire transfer, and during combustion, a negative pressure is generated on the plate plate (5) between the adjacent flame ports (3), and the high temperature gas generated by the combustion is generated. Due to this negative pressure, the bases of the combustion flames are entrained in the mutual flame port (3) direction and are connected to each other, and the respective combustion flames are stabilized on the plate plate (5).

The secondary air holes (4) are smaller than the opening area of the flame openings (3), and the lines (x) and (y) connecting the shortest adjacent flame openings (3) are used as axes of symmetry. Since each of the flame openings (3) is formed at the same distance and symmetrically from each other, each flame opening (3)
It is possible to supply the secondary air in a well-balanced manner with respect to the combustion flame, and to reduce the wasteful supply of the secondary air.

Embodiment An embodiment of the burner according to the present invention will be described below with reference to the drawings.

1 and 2 show an example of a burner, in which (A) is a burner body, and a large number of projecting cylindrical burner ports ( 1) are arranged in rows and columns at regular intervals, and are formed in a casing shape with an open lower surface. (5) has a large number of flame openings (3) matching the flame openings (2) of the burner body (A), and is located between adjacent burner ports (1) around the flame openings (3). With a plate plate having a large number of secondary air holes (4),
The upper surface of the burner port is intimately polymerized and integrally fixed with any fixing means. The secondary air holes (4) of the plate plate (5) have an opening area smaller than that of the flame openings (3), and a line (x) connecting the shortest adjacent flame openings (3),
(Y) is provided in a symmetrical position at an equal distance from the flame port (3) with the axis of symmetry as the axis of symmetry, and the positions on the lines (x) and (y) (for example,
No secondary air holes are formed in the X mark (d) (see FIGS. 3 and 4). Further, (B) is a casing-shaped mixing chamber main body having a mixing chamber (7) having a primary air inlet (6) opened on one side and an upper surface opened, and a ridge (8) is formed on the inner end of the upper surface of the peripheral wall. )
And the lower surface of the peripheral wall of the burner body (A) is attached to the outside of the ridges (8) to form the burner body (A) and the mixing chamber body (B).
It can be easily and reliably combined with.

In the figure, (C) is a flame hole dividing plate integrally provided with a number of divided pieces (9) corresponding to a certain block of a large number of flame holes (2) of the burner body (A). 9) is inserted into the flame hole (2) and the burner body (A) and the mixing chamber body (B) are inserted.
And the combustion flame (a) is rectified and stabilized by being sandwiched and held by a support rod (10). Also (11)
Is a gas nozzle and is installed so as to face the primary air intake of the mixing chamber (7).

In the above configuration, since the secondary air hole (4) is not formed between the flame openings (3) adjacent to each other as shown by the X mark (d), the secondary air flow is generated at the time of ignition. It does not interfere with the transfer of flame between the flame openings (3), and during combustion, as shown in FIGS. 5 and 6, on the plate plate (5) between the adjacent flame openings (3). A negative pressure is generated, and the high temperature gas (e) generated by the combustion is entrained in the mutual flame port (3) direction by this negative pressure, and a part of the base ends of the combustion flames (a) are in the mutual flame port (3). The respective combustion flames (a) extending in the direction of and are connected to each other at four sides of the base end thereof to form a connecting flame (b).

Therefore, the respective combustion flames (a) are held by the connecting flames (b) and the combustion flames (a) are stabilized (fifth).
(See Figures and 6). The secondary air flow (e) 'necessary for combustion of the combustion flame (a) is a secondary air flow provided in other areas except on the lines (x) and (y) connecting the adjacent flame ports (3). Since it is forcibly supplied from the air holes (4), it burns properly and withstands high-load combustion. In addition, the secondary air holes (4)
Is smaller than the opening area of the flame opening (3), and is equidistant from the flame opening (3) about the lines (x) and (y) connecting the shortest adjacent flame openings (3) as axes of symmetry. Since the holes are provided at symmetrical positions, secondary air can be supplied to the combustion flame (a) of each flame port (3) in a well-balanced manner, and
The useless secondary air supply can be reduced. As a result, the combustion flame (a) becomes more stable, the amount of air blown can be suppressed, and air blow noise and combustion noise can be reduced.

Effects of the Invention As described above in detail, according to the present invention, it is possible to improve the stability of the combustion flame and the transfer performance at the time of ignition while satisfactorily supplying the secondary air to the combustion flame. Produce an effect. In addition, since the proportion of the supplied secondary air that contributes to combustion increases, it is possible to suppress the amount of air blown and reduce air blow noise and combustion noise.

It should be noted that, as in the embodiment, when the rectification of the combustion flame (a) by the flame hole dividing plate (C) and the entrainment action of the secondary air flow of the present invention are used together, the stability of the combustion flame is further improved. You can

[Brief description of drawings]

FIG. 1 is a sectional view of a burner according to the present invention, FIG. 2 is a partially cutaway plan view, FIG. 3 is a plan view of a plate plate, FIG. 4 is a partially enlarged plan view thereof, and FIG. FIG. 6 is a plan view of the main part showing a state, FIG. 6 is a plan view of the same, and FIG. 7 is a plan view of a conventional example. (A) …… Burner body, (1) …… Burner port,
(2) ... Flame hole, (3) ... Flame port, (4) ... Secondary air hole, (5) ... Plate plate.

Claims (1)

[Claims] 1. On a large number of protruding cylindrical burner ports (1) arranged in a row in a burner body (A), a large number of flame openings (3) matching the flame holes (2) of the burner port (1) are provided. Secondary air holes (4)
In a burner formed by superimposing and fixing plate plates (5) perforated with the plate plate (5), the number of secondary air holes (4) in the plate plate (5) is made larger than the number of flame ports (3), and Each of the secondary air holes (4) of the plate (5) has a smaller opening area than each of the flame openings (3), and the lines (x) and (y) connecting the shortest adjacent flame openings (3) are connected to each other. A burner characterized by being provided as symmetrical axes at symmetrical positions equidistant from the flame port (3) and not provided on the lines (x) and (y).