JPH05256419A - Gas burner - Google Patents

Abstract

PURPOSE:To avoid a possibility of failure of the pilot without being affected by swirl by providing a mixed gas discharging nozzle for the pilot independent of the mixed gas discharging nozzle on the inner and lower portion of the annular wall. CONSTITUTION:Mixed gas supplied by a pipe 23 is injected into two slits 20a, and then, injected in the parallel direction after contacting with a stage portion 18. Mixed gas is ignited, which serves as a pilot. When a gas burner is used, mixed gas is supplied into a gas chamber 9 by pipes 14, 15, and air is supplied into an air chamber 10. Mixed gas supplied into the gas chamber 9 is fed under pressure to each slit 20 through a hole 22, and injected toward the center of a flame tube 5 from each slit 20. Moreover, air is injected into a combustion chamber 7, forming a swirl. Mixed gas and air join with each other in the combustion chamber 7 and ignited by the pilot. The pilot is in the lower portion of the combustion chamber 7, that is, the lower portion of the circling mixture, so that, it is not affected by the swirl.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas burner, and more particularly, to a pilot burner mechanism for a gas burner which burns a gas mixture while swirling it in the upper part of a combustion chamber.

[0002]

2. Description of the Related Art In particular, one used as a commercial gas burner is one in which a gas mixture is swirled and burned in the upper part of a combustion chamber.

[0003]

In such a gas burner, since the momentum of the gas mixture is high, the pilot flame for ignition may be extinguished and ignition may not be possible.

Therefore, an object of the present invention is to provide a gas burner having a pilot fire mechanism that is unlikely to disappear.

[0005]

In the gas burner of the present invention, a combustion chamber is defined by an annular wall, an annular air chamber is formed on the outer periphery of the annular wall, and the inner wall of the annular wall is formed over the entire lower portion of the inner surface. Face the gas mixture ejection port, above the annular wall,
In a gas burner that communicates with the air chamber and the combustion chamber, and through which a secondary air discharge hole is provided in a direction along the peripheral surface, and performs combustion while swirling a gas mixture in the upper portion of the combustion chamber, A gas mixture jet port for pilot fire, which is independent of the gas mixture jet port, faces the lower portion of the inner surface of the annular wall.

[0006]

[Operation] In the gas burner of the present invention, the gas mixture for pilot combustion is ejected below the swirling portion of the gas mixture, that is, in a portion that is not affected by the swirling flow, so the pilot fire is secured without extinguishing It

[0007]

1 to 5 show a gas burner according to the present invention. In this gas burner, an outer cylinder 1, a top plate 2 that covers the upper end of the outer cylinder 1, a bottom plate 3 that covers the lower end of the outer cylinder 1, a partition wall 4 that divides the inside of the outer cylinder 1 into upper and lower parts, and a ceiling wall from the partition wall 4. A housing is composed of an inner cylinder 5 arranged up to the plate 2 and a partition plate 6 that divides the inner cylinder 5 into upper and lower parts. In this housing, the portion surrounded by the inner cylinder 5 above the partition plate 6 is the combustion chamber 7, and the portion defined by the inner cylinder 5, the outer cylinder 1, the top plate 2 and the partition wall 4 is the upper air chamber. It is 8. Furthermore, in this housing, the inner cylinder 5
Inside, a gas chamber 9 is formed in a space sandwiched between the partition plate 6 and the partition wall 4, and a lower air chamber 10 is defined by the outer cylinder 1, the partition wall 4 and the bottom plate 3.

The outer cylinder 1 comprises an upper outer cylinder 1a and a lower outer cylinder 1.
It is divided into b, and the partition wall 4 is sandwiched between them.

The top plate 2 has a hole 11 at the center, which has the same diameter as the inner diameter of the inner cylinder 5.

The bottom plate 3 has holes 12 in the central portion and the peripheral portion.
13 has a hole, and a pipe 14 is provided through the hole 12,
The end of the pipe 15 is connected to the hole 13.

The partition plate 4 has four holes 16 at the peripheral edge thereof, and these holes 16 are the upper air chamber 8 and the lower air chamber 1.
It communicates with 0.

The inner cylinder 5 is divided into an upper inner cylinder 5a and a lower inner cylinder 5b. Then, six secondary air discharge holes 17 are formed on the peripheral wall of the middle portion of the upper inner cylinder 5a. The hole 17 is formed toward the upper inside as shown in FIG. 1 and toward the direction along the peripheral wall as shown in FIG. Further, two steps of notches 18 and 19 are formed on the inner circumference of the lower end of the upper inner cylinder 5a.

24 slits 20 are formed at equal intervals on the upper end of the lower inner cylinder 5b, as shown in FIG.
As shown in FIG. 1, a notch 2 is formed on the inner circumference of the lower end of the lower inner cylinder 5b.
1 is formed. Further, the wall of the lower inner cylinder 5b is formed with holes 22 which communicate the slits 20 with the notches 21, of which two holes 2 are separated by 180 °.
A pipe 23 communicates with 2a. Furthermore, as shown in FIG. 4, six holes 24 that connect the combustion chamber 7 and the upper air chamber 8 are formed in the middle portion of the lower inner cylinder 5b.

A relatively high-concentration gas mixture adjusted by an adjuster 25 is flown through the pipe 14 of the housing, air is flown through the pipe 15, and burnt by an adjuster 26 through the pipe 23. The required optimum proportion of gas mixture is flowed.

In such a gas burner, the gas mixture supplied by the pipe 23 has two slits 20a.
It is injected into the inside, hits the step 18 and is changed horizontally,
As shown in FIG. 3, the fuel is injected toward the center of the inner cylinder 5.
Then, the gas mixture is ignited, and this becomes a pilot fire.

When using a gas burner, the pipe 1
A gas mixture is supplied to the gas chamber 9 by 4, 4 and air is supplied to the air chamber 10. The gas mixture supplied to the gas chamber 9 is pressure-fed to each slit 20 through the hole 22 and ejected from each slit 20 toward the center of the inner cylinder 5. Further, the air supplied to the air chamber 10 is ejected as a swirling flow from the hole 17 into the combustion chamber 7 through the air chamber 8,
A part is ejected from the hole 24 into the combustion chamber 7. The gas mixture and air completely merge in the combustion chamber 7 and are ignited by the pilot flame during that time.

[0017]

As described above, in the gas burner according to the present invention, since the pilot fire is located in the lower part of the combustion chamber, that is, below the swirling air-fuel mixture, it is hardly affected by the swirling flow, and There is no fear of disappearing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a gas burner according to the present invention, showing main parts on the same plane.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV in FIG.

[Explanation of symbols]

 1 Outer Cylinder 2 Top Plate 3 Bottom Plate 4 Partition 5 Inner Cylinder 6 Partition Plate 7 Combustion Chamber 8 Air Chamber 9 Gas Chamber 11 Hole 14, 15 Pipe 16, 17 Hole 18 Notch 20, 20a Slit 21 Notch 22 Hole 23 Pipe 24 Hole 25 , 26 Adjust

Claims (1)

[Claims] 1. A combustion chamber is defined by an annular wall, an annular air chamber is formed on the outer periphery of the annular wall, and a gas mixture jet outlet is exposed over the entire lower circumference of the inner surface of the annular wall, On the upper part of the wall, the air chamber and the combustion chamber are communicated with each other, and a secondary air discharge hole is formed through in a direction along the peripheral surface, and combustion is performed while swirling the gas mixture in the upper part of the combustion chamber. In the gas burner for carrying out the above, a gas burner jet for pilot fire, which is independent of the gas mixture jet, is exposed to the lower part of the inner surface of the annular wall.