JPS63201415A - Gas burner - Google Patents

Abstract

PURPOSE:To surely and easily regulate the flow rate distribution of mixed gas to a desired distribution in the direction of row of flame holes by disposing protrusions for fine adjustment of flow rate in or near to the throttle which limits the gas flow rate to flame holes. CONSTITUTION:At six locations opposing ribs 7A, 7A and corresponding to the center of flame holes 3 in the direction of row of flame holes in the slopes 6a, 6a of a U-shaped inner side plate 6, protrusions 8 for fine adjustment of flow rate having nearly a trapezoidal section shape are stamped close to the downstream side slope 7a of the rib 7A. By the action of flow rate adjustment by a gap S in the throttle 7 as well as the diffusing guide action of mixed gas due to the configuration of the throttle 7, the flow rate distribution can coarsely be regulated in the direction of row of flame holes. Further, by the action of flow rate adjustment by the protrusions 8 formed in the throttle 7, the flow rate distribution in the direction of row of flame holes for mixed gas can be finely adjusted to make the flame uniform in the direction of row of flame holes.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gas burner installed in water heaters, fan heaters, etc. The present invention relates to a gas burner in which a constriction part for regulating the flow rate of gas to a flame hole is formed on a side wall forming a communicating flow path.

[Conventional technology]

Conventionally, in the above gas burner, as shown in FIG.
Among the outer plates (5), (5) forming flow passages (2) that communicate with the two rows of flame holes (3), the amount of mixed gas ejected from the flame holes (3) is the largest. At both ends of the flame hole row direction,
A constricted portion (7) protruding toward the flow path (2) was formed by stamping (no literature available).

[Problem that the invention seeks to solve]

In the case of this conventional gas burner, by forming a constriction part (7) at a location where it is desired to regulate the flow rate of the mixed gas to the flame hole (3), the flow rate regulation effect is achieved by the gap (S) of this constriction part (7). The configuration is such that the flow rate distribution of the mixed gas in the direction of the burner port array can be uniformly adjusted by the dispersion guide action of the mixed gas due to the shape of the constriction part (7). Even the slightest change in the shape and dimensions of 7) will have a significant effect on the flow rate distribution of the mixed gas in the direction of the flame port array.
The problem was that it had to be processed with high precision, and that processing required advanced technology and a lot of effort.

An object of the present invention is to provide a gas burner that can reliably and easily adjust the flow rate distribution of a mixed gas in the direction of the flame hole rows to a desired flow rate distribution even though the constriction part is roughly processed. be.

[Means for solving problems]

The gas burner according to the present invention is characterized in that a protrusion for finely adjusting the flow rate is provided at or near the constriction part that regulates the gas flow rate to the flame hole, and the functions and effects thereof are as follows. .

[For production]

The flow rate distribution of the mixed gas in the direction of the flame hole rows can be adjusted by the flow rate regulation effect by the gap of the throttle part and the dispersion guide effect of the mixed gas by the shape of the throttle part, and
The flow rate distribution of the mixed gas can be finely adjusted by the flow rate regulating effect of the protrusion formed at or near the constriction part. Moreover, the gap between the tip of the protrusion and the opposing side wall is very small compared to the gap of the constriction part.
Since the flow rate is subtly regulated by the width and number of the protrusions, dimensional errors in the protrusions have very little effect on the flow rate distribution.

〔Effect of the invention〕

As a result, since the flow distribution can be finally finely adjusted by the protrusions, the function of coarsely adjusting the flow rate distribution is sufficient in the throttle part, and the processing accuracy required for this throttle part is correspondingly low. Furthermore, since the protrusion has a large tolerance for its fine adjustment function, it is possible to ensure that the flow rate distribution of the mixed gas in the direction of the flame hole rows is the desired flow rate distribution while simplifying the overall manufacturing process. , could be easily adjusted.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figures 1 to 4 show gas burners for instantaneous water heaters,
The burner body (1) has a plurality of substantially rectangular shaped channels each communicating with a mixed gas supply channel (2) formed inside the burner (1) and having a C-shape facing downward when viewed from the front. flame holes (3) are provided in a row, and two rows of flame holes (3) are arranged in parallel in a direction perpendicular to the row direction,
Between the adjacent rows of flame holes (3), there is a flame holding recess (
4) is formed.

A pair of metal outer plates (5) forming the flame hole (3) and the mixed gas supply channel (2) of the burner body (1).
, Among (5), the mixed gas is supplied to both ends of the flame hole row direction where the jetting speed of the mixed gas from the flame hole (3) increases in the pressure equalizing flow path near the entrance of the flame hole (3). Water flow path (2)
A protruding ridge (7A
), (7^) are formed by stamping, and the metal inner plate (6) has a substantially U-shaped cross section and defines the flame holding recess (4) and the flame hole (3). At the bottom, the protrusion (7A), the downstream slope (7a) of (7A),
(7a) are formed to form slopes (6a) and (6a) substantially along the direction of the flame hole array to constitute a throttle portion (7) that regulates the gas flow rate to the flame holes (3) located at both ends in the flame hole row direction. There is.

The protrusions (7A) and (7^) of the constricted portion (7) are formed by a gap (Sl) formed between the ridge lines of the protrusions (7A) and (7A) toward the end in the flame hole row direction, and , protrusion (7A)
, downstream slope (7a) of (7A), (7a) and U
The gap (S) formed between the slopes (6a) and (6a) of the square-shaped inner plate (6) is tapered so that it gradually becomes smaller.

The slopes (6a), (6a) of the U-shaped inner plate (6)
), the protrusions (7^) and (7A) are located at six locations facing the protrusions (7^) and (7A) and corresponding to the center of the flame hole row direction of the flame holes (3), respectively. 7A) Flow fH having a nearly trapezoidal cross-sectional shape located close to the downstream slope (7a)
A protrusion (8) for k adjustment is formed by stamping.

Then, the flow rate distribution of the mixed gas in the direction of the flame hole rows is roughly adjusted by the flow regulating action by the gap (S) of the throttle part (7) and the dispersion guide action of the mixed gas by the shape of the throttle part (7). At the same time, due to the flow regulating effect of the protrusion (8) formed on this constriction part (7), the flow rate distribution of the mixed gas in the direction of the flame hole rows can be finely adjusted, and the flame in the direction of the flame hole rows can be adjusted. can be made uniform.

The height of the flow rate fine adjustment protrusion (8) is approximately 1 to 2 fi or less, and there is almost no gap between the tip of this protrusion (8) and the downstream slope (7a) of the protrusion (7A). , the amount of fine adjustment of the mixed gas is determined by the width and number of the protrusions (8).

In other words, since the flow rate distribution can be finally finely adjusted by the protrusion (8), it is sufficient that the throttle part (7) has the function of coarsely adjusting the flow rate distribution. The required machining accuracy is low, and since the protrusion (8) has a large tolerance for its fine adjustment function, it is possible to simplify the overall manufacturing process while also controlling the gas mixture in the direction of the flame hole rows. This can promote uniformity of the flow rate distribution.

Further, at the re-entrance part of the mixed gas supply channel (2) of the burner main body (1), there are nozzles (9) arranged at the center position between these two intake parts. An ejector section (10
), (10) are formed.

Furthermore, between the outer plates (5), (5) and the U-shaped inner plate (6), there is a metal partition plate that divides the flame 71 (3) into two at the center position in the direction of the flame hole array. (11), and in the flame hole (3) side portion of the outer plate (5), (5), on both sides of each flame hole (3) in the flame hole row direction, A flame holding part (12) is formed which bulges outward.

And between adjacent rows of flame holes, flame holding recesses (4) are provided.
The lift of the flame can be suppressed by the flame holding effect due to the negative pressure at Since the flame holding part (12) that bulges outward is formed, the flame hole (3)
The flow rate decreases due to the increase in the flow path area, and the flame holding part (1
Combined with the lift suppressing effect of the vortex generated in the bulging step section 2), the lift phenomenon of the flame outside the flame hole (3) can be suppressed.

Moreover, the flame-extinguishing effect of the partition plate (11) provided in the flame hole (3) can suppress backfire, which is likely to occur particularly in the case of a mixed gas with a high combustion rate.

Next, another example will be described.

(B) In the above embodiment, the flow rate fine adjustment protrusion (8) was formed corresponding to the central part of the flame hole row direction of the flame hole (3), but the fifth
As shown in the figure, the protrusions (8) may be formed at locations corresponding to adjacent flame holes (3), or may be formed at uneven pitches.

(2)) In the above-mentioned embodiment, the technology of the present invention was applied to a gas burner in which the mixed gas supply channel (2) was approximately C-shaped. Supply channel (
2) is a rectangular gas burner when viewed from the front, or an 8th
As shown in Figures 10 to 10, the mixed gas supply channel (2
) may be applied to a gas burner that is T-shaped when viewed from the front.

In the gas burners shown in FIGS. 6 and 7, a pair of metal outer plates (
5) Among (5), in the pressure equalizing flow path near the entrance of the flame hole (3), a flame is placed at one end in the flame hole row direction where the jetting speed of the mixed gas from the flame hole (3) increases. A constriction part (7) is formed to regulate the gas flow rate to the hole (3), and a fine flow rate adjustment part is formed in this constriction part (7) corresponding to the center of the flame hole (3) in the flame hole row direction. A protrusion (8) for use is stamped out.

In the gas burner shown in FIGS. 8 to 10, a pair of metal outer plates (5), (5) forming a flame hole (3) and a mixed gas supply flow path (2) are used. At the center of the wide channel portion (2A) of (2), and at the center of the narrow channel portion (2A),
The narrow channel portion (2B) corresponds to the spout port of 2B).
) are formed into approximately triangular protrusions (7B), (7B) whose width in the gas jetting direction becomes smaller as they move away from the extended position of the jetting center line in the width direction of the wide channel portion (2A); The flame hole (3) and flame holding recess (4)
The triangular protrusion (7B), (
7B) are formed on the downstream slopes (7b), (7b) and parallel slopes (6a), (6a) to regulate the gas flow rate to the flame hole (3) located in the center of the flame hole row direction. A diaphragm section (7) is configured. Furthermore, the U-shaped inner plate (
Among the slopes (6a) and (6a) of 6), the protrusion (
7B) and corresponding to the center of the flame hole row direction of the flame hole (3), the protrusion (7
A flow rate fine adjustment protrusion (8) close to the downstream slope (7b) of B) is formed by punching.

(c) In each of the above embodiments, the aperture part (7) and the protrusion (8)
By doing this, we attempted to equalize the flow rate distribution of the mixed gas in the direction of the flame hole rows, but by reducing the amount of mixed gas ejected from some flame holes (3) in the flame hole group, we intentionally created small flames. It is also possible to make the flame stable.

In short, the throttle portion (7) and the protrusion (8) may be provided at locations where it is desired to regulate the flow rate to a small amount in accordance with the set flow rate distribution. In other words, the shape, dimensions and protrusion (8) of the aperture part (7)
) By appropriately setting the shape, size, and number of the flow rate distribution, it is possible to obtain an arbitrary flow rate distribution.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

1 to 4 show examples of the gas burner according to the present invention, FIG. 1 is a sectional view taken along the line 1-1 in FIG. 3, and FIG.
3 is a front view of the entire gas burner, and FIG. 4 is a plan view of the entire gas burner. FIG. 5 is a plan view of essential parts showing another embodiment, and FIGS. 6 and 7 are also a front view and a plan view of the entire burner showing another embodiment. Furthermore, FIGS. 8 to 10 also show other embodiments, where FIG. 8 is an overall front view of the gas burner, FIG. 9 is a plan view of the entire gas burner, and FIG. 10 is a cross section taken along line X-X in FIG. 8. It is a diagram. FIG. 11 is a sectional view showing a conventional gas burner. (2)...Flow path, (3)...Flame hole, (
7)... Throttle part, (8)... Protrusion for flow I fine adjustment.

Claims (1)

[Claims] 1. A large number of flame holes (3) are formed in a row, and these flame holes (3) are formed in a row.
), there is a flame hole (3) in the side wall forming a flow path (2) communicating with the
A gas burner in which a constriction part (7) is formed to regulate the gas flow rate to the gas burner, and a protrusion (8) for finely adjusting the flow rate is formed at or near the constriction part (7). 2. The gas burner according to claim 1, wherein the narrowed portion (7) is formed in a tapered shape such that the width of the gap (S) increases toward one end in the flame hole row direction. 3. The gas burner according to claim 1, wherein the narrowed portions (7) are formed in a parallel state in which the width of the gap (S) is the same in the flame hole array direction. 4. The flow rate fine adjustment projection (8) is formed with a height slightly shorter than the width of the gap (S) of the throttle part (7). gas burner.