JPS6119295Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a gas stove in which the fuel injection part of the main burner and the ignition part of the pilot burner for ignition are separated by a partition wall, and in particular, a pilot flame introduction hole is provided in the partition wall. Improves ignition performance,
Furthermore, a plate provided behind the flame introduction hole suppresses flashback and prevents the steady combustion performance from being affected by flashback.

Conventionally, in a diffusion combustion gas stove, a pilot burner for ignition is installed close to the combustion jet section, and at startup, the pilot burner flame collides with the premixing section of the outer combustion tube, but the combustion air provided in the premixing section The intake hole is so small that the pilot flame cannot pass through the air intake hole;
Previously, only the raw gas was supplied between the inner and outer combustion cylinders, and the main gas was ignited through the combustion section of the outer combustion cylinders.

However, when the pilot flow rate is low, the ignition flame does not reach the combustion section, resulting in poor ignition performance.

Additionally, during steady combustion, if no plate is provided, the air flowing in from the flame introduction hole and the main gas flowing out from the fuel injection part will react and easily backfire into the flame introduction hole. The backfired flame extends toward the internal combustion cylinder, and has a large effect on the main gas flowing out from the fuel injection part.Due to the draft effect of the backfired flame, the distribution of the main gas in the combustion part becomes uneven, resulting in red flames, etc. It was the cause of

The present invention improves the problems of the prior art described above. The details of the present invention will be explained below with reference to the drawings. 1 to 4 show an embodiment of the present invention, and in the figures, 1 is the main burner fuel injection part, 2 is the outer combustion tube premixing part, 3 is the outer combustion cylinder combustion part, and 4 is the outer combustion tube combustion part. 1 is an inner combustion cylinder premixing part, 5 is an internal combustion cylinder combustion part, 6 is a pilot burner for ignition, 7 is a cock, 8 is a glass cylinder, 9 is a drafter, 10 is a glass holder, 11 is a piezoelectric spark plug, 12 is The flame introduction hole 13 is a plate.

First, the configuration and combustion method of a diffusion combustion type gas stove will be described with reference to FIG. After the tank 7 is opened, fuel gas is simultaneously ejected from the main burner 1 and the pilot burner 6 for ignition. Main burner 1
The gas ejected from the combustion chamber is mixed with the air flowing in through the numerous holes provided in the premixing sections 2 and 4 of the inner and outer combustion tubes in the passage between the inner and outer combustion tubes leading to the combustion sections 3 and 5 of the inner and outer combustion tubes. reach. On the other hand, the flame of the pilot burner 6 for ignition heats the outer combustion tube premixing section 2, and partially supplies natural gas from the holes in the combustion tube premixing section 2 between the inner and outer combustion tubes to the outer combustion tube. The gas rises along the line and reaches the combustion section 3, where it ignites the gas in the main burner. After ignition, a part of the premixed gas reacts with the secondary air flowing in from the hole in the combustion part 5 of the inner combustion cylinder, forming a flame between the inner and outer combustion cylinders, and a part of the premixed gas reacts with the secondary air flowing in from the hole in the combustion part 5 of the inner combustion cylinder, and a part of the premixed gas reacts with the secondary air flowing in from the hole in the combustion part 5 of the inner combustion cylinder, forming a flame. The gap between the outer combustion tube 3 and the glass holder 10 is further extended to the outside due to the draft effect of the outer combustion tube, the glass tube 8, and the drafter 9.
A flame is formed outside the combustion section 3 while reacting with the secondary air flowing in.

Next, the action will be explained in detail.

In FIG. 3, during startup, the pilot burner flame passes through the flame introduction hole 12 provided in the outer combustion tube premixing section 2, and after colliding with the plate 13, the pilot burner flame
The fuel flows out between the inner and outer combustion cylinders through the left, right, and upper gaps between the premixing part 3 and the outer combustion cylinder premixing part 2, and supplies ignition flame to the fuel injection part 1. The main gas flowing out from the fuel injection part is ignited by the flame, and the main gas flows out from the fuel injection part 1.
The flame spreads around the entire circumference and rises due to thermal expansion and draft, reaches the combustion parts 3 and 5 of the inner and outer combustion cylinders, forms a flame, and transitions to steady combustion.

During steady combustion, air flows into the space between the inner and outer combustion cylinders from the flame introduction hole 12 due to the draft, but since the fuel injection part 1 side of the plate 13 is closed, it is sufficiently mixed with the main gas. If this is not done, flashback will be less likely to occur, and even if flashback occurs, the flashback flame will be formed between the outer combustion tube premixing section 2 and the plate 13, so it will not have a major effect on the main gas. This reduces the amount of red flame that forms in the combustion section of the outer combustion tube.

As described above, the present invention exhibits good ignition performance even when there are few pilot meteors by providing the pilot flame introduction hole in the outer combustion cylinder premixing section, and the plate provided behind the flame introduction hole allows It can prevent backfire.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a diffusion combustion type gas stove according to an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a pilot burner for ignition, a combustion tube,
FIG. 4 is a partially cutaway perspective view showing the structure of the flame introduction hole and the plate, and FIG. 4 is a perspective view showing the structure of the plate and the outer combustion tube. 1...Fuel injection part, 2...Outer combustion tube premixing part,
3... Outer combustion tube combustion section, 4... Inner combustion tube premixing section, 5... Inner combustion tube combustion section, 6... Pilot burner for ignition, 7... Kotoku, 8... Glass tube, 9
... Drafter, 10 ... Glass pedestal, 11 ...
Piezoelectric ignition plug, 12...Flame introduction hole, 13...
...Plate body.

Claims (1)

[Scope of utility model registration request] In a gas stove in which a pilot burner ignites gas ejected from a fuel injection part into a space between an inner combustion tube and an outer combustion tube, the outer combustion tube is provided with a pilot flame introduction hole, and the flame is ignited in the space. A plate is provided at a position facing the introduction hole with a gap between it and the outer combustion cylinder, and
A gas stove in which the fuel injection part side of the plate body is closed with an external combustion cylinder.