JPS6238103Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention can maintain stable combustion even when the combustion load of the gas burner is varied, and also enables high-load combustion by increasing the primary air suction capacity. It relates to a gas burner that can

[Prior Art] In recent years, as gas appliances have become smaller, gas burners have been developed that are compatible with proportional control of gas amount.

[Problems to be solved by the invention] The invention solves the list phenomenon that occurs during high-load combustion.
The purpose of this invention is to solve the drawbacks of conventional gas burners such as incomplete combustion, flashback, and yellow chips that occur during low-load combustion, and to provide a gas burner that can always maintain stable combustion from high-load combustion to low-load combustion. .

[Means for Solving the Problems] The structure of the present invention for achieving the above object will be explained using FIGS. 1 to 3 corresponding to the embodiments. In a gas burner body 1 which is provided with a plurality of flame ports 12 partitioned by a gas burner body 1 with a plurality of flow divider plates 4 and 5 sandwiched therebetween, the gas passage portion of the flame port 12 is divided into slit shapes, and the center of the gas burner is divided into slit shapes. A flow dividing plate 6 having a deformed part 7 having a U-shaped cross section at the upper part of the gas passage 9 is fixed by the step push part 3, and the passage 9 is closed by the deformation part 7, and the upper part of the step push part 3 is fixed. A technical measure is taken in which notches 8 are provided on the deformed portion 7 of the flow divider plate 6 and the upper portions of the other flow divider plates 4 and 5.

[Function] Primary air and gas are mixed in the mixing tube (not shown) and the mixed gas rises, while the flame port 12
The gas passing through the central gas passage 9 collides with the U-shaped deformed part 7 of the central flow divider plate 6 at the outlet of the flame outlet, flows to both ends along the U-shaped deformed part 7, and forms a central branch near the upper part of the stepped push part 3. Above the U-shaped deformed portion 7 of the plate 6 and the notch 8 on the top of the other outer flow divider plates 4 and 5, the flow collides with the flow from the U-shaped deformed portion 7 of the adjacent flame opening 12, creating a vortex. Diffuses and mixes with secondary air to form a flame.

On the other hand, the gas passing through the outer gas passages 10, 10 is
The bulging portion 2 of the gas burner body 1 and the outer flow dividing plates 4 and 5
Outer flame outlet portions 11, 11 formed by
It erupts and forms a flame while spreading more.

[Example] An example of the present invention will be described below based on FIGS. 1 to 3.

Reference numeral 1 denotes a burner body which is fixed to the upper part of a mixing tube (not shown) and has a plurality of flame ports 12, 12, . A bulging portion 2 is formed above the intermediate portion and bulging outward. 4 and 5 are each flame outlet 1
The flow dividing plates 4 and 5 are fixed by a plurality of step pushers 3, and the flow dividing plates 4 and 5 direct the central gas into the flame opening 12. A passage 9 and outer gas passages 10, 10 are formed. Reference numeral 6 designates a central flow divider plate having a deformed portion 7 having a U-shaped cross section on its upper part. The upper part of the central gas passage 9 formed by the outer flow dividing plates 4 and 5 of the mouth is closed by a deformed part 7 having a U-shaped cross section. Reference numeral 8 denotes a cutout portion obtained by cutting out the U-shaped cross-sectional deformed portion 7 of the upper portions of the outer flow divider plates 4 and 5 and the central flow divider plate 6 above and in the vicinity of the stepped portion 3 of each flame port 12.

In the above embodiment, the flame outlet part 12 is configured with two outer flow divider plates and one center flow divider plate, but the structure is not limited to the above embodiment, and three flow divider plates may be used.
Even if more than one is provided, the same effect can be obtained.

In addition, the central flow divider plate 6 is provided with a deformed portion having a U-shaped cross section at the upper part of the plate body in order to improve assembly and shielding properties, and the upper part of the center flow divider plate 6 is not necessarily U-shaped. Any type of material may be used as long as it closes the upper surface of the central gas passage.

[Effect] Therefore, since the present invention has the above configuration, the flame formed in the upper part of the notch 8 and the outer flame outlet part 1
Since the flames formed in 1 are independent, they can diffuse well with the secondary air, the length of the flame can be shortened, and it is possible to achieve the effect that incomplete combustion is less likely to occur and yellow chips are less likely to occur.

Furthermore, the U-shaped deformed portion 7 provided in the central flow divider plate 6 increases the boundary velocity gradient of each burner at the outlet of the burner, thereby preventing the flashback phenomenon that tends to occur particularly during low-load combustion. Although the gas passage is blocked by the U-shaped deformed portion 7 at the upper part of the central gas passage 9, the gas passing through the central gas passage 9 flows through the notches of the flow dividing plates 4, 5, and 6. Since it can be ejected from the part 8, the pressure loss at the flame port can be kept low, and by increasing the primary air suction ability, high-load combustion is possible.

That is, according to the present invention, by blocking a portion of the flow dividing plate, stable combustion is always maintained from low-load combustion to high-load combustion.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. 1. 1...Gas burner body, 2...Bulging part, 3...
Step push part, 4...Outer flow divider plate, 5...Outer flow divider plate,
6... Central flow divider plate, 7... U-shaped deformed part, 8...
... Notch portion, 9... Central gas passage, 10... Outer gas passage, 11... Outer flame outlet portion, 12... Flame mouth portion.

Claims (1)

[Scope of utility model registration request] In a gas burner in which a plurality of flow divider plates are sandwiched between a gas burner main body having a plurality of flame openings partitioned by stepped parts, and the gas passage section of the flame opening is divided into slits, the central part of the gas burner is divided into slits. A flow divider plate having a deformed part having a U-shaped cross section at the upper part of the gas passage is fixed by a stepped part, and the passage is closed by the deformed part. A gas burner characterized in that a notch is provided in the upper part of the flow dividing plate.