JPH025206Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a burner used in water heaters, etc. Specifically, the present invention relates to a burner used in water heaters, etc. A plurality of air jet ports are arranged in parallel in a direction in which the fuel gas jet ports are arranged side by side, and a plurality of air jet ports are arranged in parallel to blow out combustion air so as to face the fuel gas jet ports when viewed in the direction in which the fuel gas jet ports are arranged side by side. Regarding burners arranged in parallel in the direction.

[Conventional technology]

Conventionally, in the above-mentioned burners, fuel gas nozzles are used to improve the mixing properties of fuel gas and combustion air for the purpose of increasing the turn-burn ratio or enabling high-load combustion. The fuel gas and the air outlet are arranged to face each other on the same axis, so that the fuel gas and the air are directly opposed to each other and directly collide with each other.

[The problem that the idea attempts to solve]

However, in the conventional burner described above, there is a problem of large noise due to the direct collision between the ejected fuel gas and the ejected air in opposing conditions, and the improvement in mixing performance is still insufficient to deal with such large noise. There were some problems that were not achieved.

An object of the present invention is to effectively improve the mixing properties of fuel gas and combustion air while reducing noise through rational structural improvements.

[Means to solve the problem]

The characteristic configuration of the burner according to the present invention is that a plurality of fuel gas nozzles that eject fuel gas in the same direction are arranged in parallel in a direction perpendicular to the fuel gas jetting direction, and when viewed in the direction in which the fuel gas nozzles are arranged, In a configuration in which a plurality of air jets that spout combustion air are disposed facing the fuel gas jets and are arranged in parallel in the direction in which the fuel gas jets are arranged, the fuel gas jetted from the fuel gas jets collides with each other. a collision surface is provided, and the air jet nozzle is arranged at a location near the collision surface of the fuel gas in a direction in which the air jet ports are arranged side by side, and the fuel gas collided with the collision surface is ejected from the air jet nozzle. An auxiliary air outlet is provided near the fuel gas collision position in the direction in which the air-fuel mixture is discharged, for ejecting air to the air-fuel mixture exhaust path in order to suppress the exhaust of the air-fuel mixture. Its functions and effects are as follows.

[Effect]

That is, according to the above-mentioned characteristic structure, the air jet port 11 is arranged to face the fuel gas jet port 9 when viewed in the direction in which the fuel gas jet ports 9 are arranged side by side (see FIG. 1).
is located near the fuel gas collision position on the collision surface a in the direction in which the air jets are arranged in parallel (same as the direction in which the fuel gas jets 9 are arranged in parallel) (see Fig. 3). The collided fuel gas is given a swirling force by the air ejected from the air jet ports 11 during the diffusion process in the direction in which the jet ports are arranged side by side after the collision.

As the fuel gas is swirled by this swirling force, the ejected air is drawn into the swirling flow of the fuel gas, and the fuel gas and air are mixed efficiently.

Furthermore, compared to conventional burners in which the ejected fuel gas and ejected air collide directly with each other in opposing states, this type of mixing does not involve such direct collision between the ejected air in the opposed state, so the generated noise is significantly greater. Reduce to

On the other hand, the mixture of fuel gas and air mixed in a swirling manner as described above moves in the discharge direction (first direction), which is the direction toward the combustion flame forming part while being diffused.
However, in the characteristic configuration described above, air is ejected to suppress air-fuel mixture discharge (in Fig. 1, By providing an auxiliary air outlet 14 that performs air-fuel mixture discharge (indicated by a two-dot chain line) to the air-fuel mixture discharge path, and suppressing air-fuel mixture discharge by using air jet from this auxiliary air outlet 14, the air-fuel mixture The diffusion of the air-fuel mixture accompanying discharge is also suppressed, and as a result, the dissipation of the swirling force accompanying the air-fuel mixture diffusion is suppressed, and the above-mentioned swirling for the purpose of mixing is promoted, and this swirling promotion effect causes the fuel gas to Mixability with air is further effectively improved.

[Effect of idea]

As a result of the above, compared to conventional burners, it is possible to create a burner with lower noise and better mixing properties of fuel gas and combustion air. It is possible to increase the burner ratio and achieve higher combustion load, resulting in a highly practical burner.

〔Example〕

Next, an example will be described.

Figures 4 and 5 show a gas instantaneous water heater, 1
are burners arranged in parallel, 2 is a Finch-Hube water heating heat exchanger that heats flowing water with fuel gas from the burner group, and 3 is a fan that supplies combustion air to the burner group. .

Gaps 5 are formed between the burners 1 and between the burners 1 and the case wall 4 to allow some of the air supplied from the fan 3 to pass through.

As shown in FIGS. 1 and 2, each burner 1 is
The main components are a plate member 6 having an M-shaped cross section, a fuel gas supply pipe 7, and a perforated block body 8.

On both sides of the fuel gas supply pipe 7, a plurality of fuel gas ejection ports 9 that eject fuel gas in the same direction are formed side by side in the longitudinal direction of the pipe (a direction perpendicular to the fuel gas ejection direction). Gas supply pipe 7,
It is disposed inside a groove 10 formed by an M-shaped plate 6 and having a substantially V-shaped cross section in a posture along the longitudinal direction of the groove.

A plurality of air outlets 11 are formed in both inner side surfaces of the V-shaped groove 10 in the M-shaped plate 6, and are arranged in the longitudinal direction of the air outlet 11. The gas ejection ports 9 are arranged to face the fuel gas ejection ports 9 when viewed in the direction in which the gas ejection ports 9 are arranged side by side.

Of both inner side portions of the V-shaped groove 10 in the M-shaped plate 6, the surface portion facing the fuel gas outlet 9 serves as a collision surface a on which the fuel gas ejected from the fuel gas outlet 9 collides. On the other hand, the above-mentioned air jet ports 11 arranged opposite to the fuel gas jet ports 9 when viewed in the juxtaposition direction of the fuel gas jet ports 9 are located near both sides of the fuel gas collision position of the collision surface a in the air jet port juxtaposed direction. It is placed in place.

On the back side of the M-shaped plate 6, a pair of restricted spaces 12 communicating with the air outlet 11 are formed by connecting the M-shaped plate 6 and the perforated block 8. The supplied air is introduced into each of the pair of restricted spaces 12 through the air passage holes 13 for regulating the air in the perforated block body 8, and the dynamic pressure of the air inflow is converted into static pressure in the restricted spaces 12. Accordingly, air is ejected from the air ejection port 11 in a direction substantially perpendicular to the opening surface thereof, that is, in a direction toward the fuel gas supply pipe 7 disposed inside the V-shaped groove 10.

With the above configuration, the fuel gas ejected from the fuel gas ejection port 9 is diffused by the air ejected from the air ejection port 11 during the diffusion process in the direction in which the ejection ports are arranged side by side after colliding with the collision surface a (see Fig. 3). A swirling force is applied, and as the fuel gas swirls due to the swirling force, the ejected air is drawn into the swirling flow of the fuel gas, and the fuel gas and air are mixed efficiently.

On the other hand, on both tops of the M-shaped plate material 6, a plurality of auxiliary air outlets 14 are formed side by side in the longitudinal direction of the V-shaped groove, and each of these auxiliary air outlets 14 is arranged in the longitudinal direction of the V-shaped groove. The fuel gas collision position on the collision surface a in the direction in which the mixture of fuel gas and the air ejected from the air jet port 11 is discharged (the direction in which the mixture heads toward the combustion flame forming section and the upper side in FIG. 1) The air-fuel mixture discharge path is located near the air-fuel mixture discharge path, and blows air (indicated by a two-dot chain line in FIG. 1) to the air-fuel mixture discharge path in order to suppress the discharge of the mixture.

That is, the air jet from the auxiliary air jet port 14 suppresses the discharge of air-fuel mixture accompanied by diffusion, thereby promoting the swirling for the purpose of mixing described above, thereby making the mixing of fuel gas and air even more efficient. I've made it happen.

Note that the present invention is not limited to the pre-mixing type (all secondary air type), but the present invention is not limited to the pre-mixing type (all secondary air type). It can also be applied to burners of the type that further mix with the blown air.

[Brief explanation of the drawing]

1 to 5 show embodiments of the present invention,
Figure 1 is a sectional view, Figure 2 is a partially cutaway plan view, and Figure 3 is a partially cutaway plan view.
4 is a front view of the gas instantaneous water heater, and FIG. 5 is a sectional view taken along the line V-V in FIG. 4. 9...Fuel gas outlet, 11...Air outlet,
14... Auxiliary air outlet, a... Collision surface.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of fuel gas nozzles 9 that eject fuel gas in the same direction are arranged in parallel in a direction perpendicular to the fuel gas jetting direction, and the fuel gas nozzles 9 are arranged side by side. A burner in which a plurality of air nozzles 11 for blowing out combustion air are arranged facing the fuel gas nozzles 9 and arranged in parallel in the direction in which the fuel gas nozzles 9 are arranged, the fuel gas nozzles 9 9
A collision surface a is provided on which the fuel gas ejected from the fuel gas collides, and the air jet outlet 11 is arranged near the fuel gas collision position of the collision surface a in the direction in which the air jets are arranged side by side. An air jet for suppressing the discharge of the mixture is discharged at a location near the fuel gas collision position in the direction in which the mixture of the fuel gas and the air jetted from the air jet port 11 is discharged. A burner provided with an auxiliary air outlet 14 for the passage. 2. The collision surface a is arranged in such a manner that the part located on the downstream side of the air-fuel mixture discharge path is further away from the fuel gas jet port 9, and is inclined with respect to the direction in which the fuel gas is jetted from the fuel gas jet port 9. A burner according to claim 1 of the utility model registration claim.