JPS593208Y2 - gas burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas burner that is effective for use in gas combustion appliances such as bathtubs.

Conventionally, various studies have been made regarding so-called universal gas burners, which are capable of burning fuel gases with different combustion speeds, such as city gas and natural gas, in the same gas burner.

For example, in order to prevent lifting, which is the most problematic issue when burning natural gas, there is a gas burner with a flame hole structure in which an auxiliary flame is placed near the base of the main combustion flame to stabilize the flame, or a gas burner with a high combustion speed. In the case of city gas, gas burners have been developed in which the main flame hole is shaped into a two-stage flame hole shape in order to prevent backfire.

However, both the flame-holding type gas burner and the multi-stage flame hole type gas burner described above have a disadvantage in that they have a complicated structure and are difficult to manufacture, resulting in high costs.

In order to solve the problem of tilting, the present invention has been developed to provide a stable system that does not cause backfire even when city gas with a high combustion rate is used, and does not cause lift without changing the flame load even when switching to natural gas. It was created with the purpose of providing a universal gas burner with a simple structure that can maintain combustion, and its gist is a slit-shaped central flame hole formed by a pair of partition plates, and stepped sections on both sides of the central flame hole. In a gas burner, a plurality of outer flame holes surrounded by a side plate having a plurality of outer flame holes are provided at a predetermined interval in the upper part of a mixing tube with a central flame hole oriented in the longitudinal direction,
A protrusion that curves outward is provided on the partition plate of the flame hole located outside the flame hole assembly located at the tip of the gas burner, and the above protrusion in the flame hole located on the mixing pipe inlet side is connected to the center part of the partition plate. The gas burner is characterized in that a notch is provided only in the central flame hole of adjacent flame hole portions, and further has a notch that connects the flame hole portions between the central flame holes of adjacent flame hole portions.

Examples of the present invention will be described below based on the drawings.
Reference numeral 1 denotes flame holes provided at a predetermined interval in the longitudinal direction of the mixing tube 3 of the gas burner.

A central flame hole 1a is provided in the center of the flame hole portion 1 by a pair of partition plates 2, 2.

Reference numerals 6 and 6 denote side plates having stepped portions surrounding both sides of the central flame hole 1a, and the stepped portions form outer flame holes 1b and lb each having a substantially W-shaped side surface.

Furthermore, a protrusion 2a that curves outwardly above the partition plates 2, 2
, 2a are provided.

Further, the flame hole portion 5 located at the tip of the gas burner has the same structure as the flame hole portion 1, but lacks the protruding portion.

Further, the flame hole section 4 located closest to the inlet side of the mixing tube has the same structure as the flame hole section 1, but has protrusions 2b, 2b provided only in the center part on the partition plates 2, 2.

9 is formed between the center flame holes of adjacent flame hole parts and is E at depth h.
This is a notch that continues the flame hole that extends into the center flame hole by the same dimension.

Further, 7 is a pilot burner located close to the flame hole portion 4.

Since the present invention has the above-mentioned configuration, the mixed gas is ejected from the mixing tube 3 in three parts, forming a central flame a and flames A and B on both sides.In this case, the mixed gas ejected from the central flame hole 1a. are the curved protrusions 2a, 2a of the partition plates 2, 2
This reduces the flow velocity and prevents lift in the case of gases with a slow combustion rate.

Further, the mixed gas ejected from the outer flame holes 1b, 1b collides at the tips and hits the protrusions 2a, 2a, so that the flow velocity is also reduced, so that the lift is suppressed.

Next, in the case of a mixed gas with a high combustion speed, the flame becomes short and the partition plates 2 and 2 are overheated, raising the temperature of the entire flame hole group and causing a backfire. However, in the present invention, Since the partition plates 2, 2 are prevented from overheating due to the cooling effect of the unburned gas flowing between the partition plates 2, 2, backfire caused by the temperature rise can be completely prevented.

The cooling effect of this unburned gas is the mixing tube population 3a.
Since the farther away from the gas burner the smaller the flame becomes due to heating by combustion, the flame hole section 5 at the leading edge of the gas burner has no protruding section that is likely to be overheated to suppress the occurrence of backfire.

Furthermore, since the flame hole portion 4 closest to the mixing tube population 3a receives the flame 8 of the pilot burner 7, it is overheated more than the other flame hole portions, and therefore, even though the above-mentioned cooling effect is large, backfire is likely to occur, but the protrusion portion 2b, 2b is provided only at the center of the partition plates 2, 2, so that the temperature rise at the flame opening is suppressed and flashback does not occur.

In this case, since there are protrusions 2b, 2b, although only in the center, the gas ejection speed is reduced and lift is prevented in the case of gas with a slow combustion speed.

Furthermore, since the gas flows over the notch 9, a continuous flame is generated and the flame transfer performance is extremely good.

As mentioned above, the gas burner according to the present invention can always maintain a stable combustion state even when using gases with different combustion speeds, and is simple in structure, easy to manufacture, and economical, and its effects are extremely large. .

[Brief explanation of the drawing]

Figure 1 is a plan view of the gas burner according to the present invention, Figure 2 is a side view of the gas burner according to the present invention, and Figure 3 is the figure 1 A-A.
4 is a sectional view taken along the line BB in FIG. 1, FIG. 5 is a sectional view taken along the line CC in FIG. 1, and FIG. 6 is a sectional view taken along the line DD in FIG. 1. Explanation of symbols 1... Flame hole part, 1a...
Center flame hole, 1b... Outer flame hole, 2...
Partition plate, 2a, 2b... Protrusion, 3...
・Mixing pipe, 3a...Mixing pipe inlet, 4...
・Flame hole part, 5...Flame hole part, 6...Side plate, 7...Pilot burner, 8...Flame, 9...・Notch.

Claims (1)

[Scope of utility model registration request] A large number of flame holes are placed in the upper part of the mixing tube in the center, consisting of a slit-shaped central flame hole formed by a pair of partition plates, and outer flame holes formed by surrounding both sides of the central flame hole with side plates having stepped parts. In a gas burner with flame holes arranged at a predetermined interval in the longitudinal direction, an outwardly curved protrusion is provided on the partition plate of the flame hole outside the flame hole assembly located at the tip of the gas burner, and a mixing The projecting part of the flame hole located on the pipe inlet side is provided only at the center of the partition plate, and furthermore, a notch is formed to connect the flame hole between the center flame holes of adjacent flame holes. gas burner.