JPH0531372Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a burner for a liquid fuel vaporization type combustor that vaporizes liquid fuel in a vaporizer and burns the vaporized fuel.

<Prior art> Conventionally, in this type of liquid fuel vaporization type combustor, when an insulating material such as ceramic is used for the burner body, the flame current for measuring the flame resistance, which is an indicator of the combustion state, is transmitted to the burner body 11.
I can't move it to the side.

In order to solve this problem, an electrode 3 made of a metal plate is arranged between the flame rod 1 and the ceramic burner main body 2 as shown in FIG. Vaporized fuel (kerosene) was being burned on flame hole 4.

<Problems to be solved by the invention> In the above configuration, near the center of the electrode 3,
It burns on the upper surface of the electrode 3 without burning on the flame hole 5 of the burner body 2 due to lack of oxygen. However, electrode 3
In the vicinity of the outer periphery of the burner body 2, combustion occurs in the flame hole 5 of the burner body 2. Therefore, the area around the outer periphery of the electrode 3 is heated and the temperature rises, causing the electrode 3 to oxidize, deteriorate, and
There was a problem with deformation.

In view of the above, the present invention aims to provide a burner for a liquid fuel vaporizing combustor that can prevent oxidation, deterioration, and deformation of electrodes.

<Means for solving the problem> The problem solving means according to the present invention is as shown in FIGS.
is formed, an electrode 13 made of a metal plate covering a part of the burner body 11 is disposed above the burner flame hole 12, and a large number of electrode flame holes 14 are formed in the electrode 13. In this burner, a closed part 16 in which the burner flame hole 12 is not formed is formed in a portion of the burner body 11 corresponding to the lower side of the outer peripheral edge 13a of the electrode 13, along the shape of the outer peripheral edge 13a. It is something.

<Function> In the above problem solving means, since the upper side of the burner flame hole 12a directly below the electrode 13 is covered with the electrode 13, the supply of oxygen is insufficient, and the vaporized fuel cannot rise and burn. First, it burns on the electrode flame hole 14 of the electrode 13.

Further, in a portion of the burner body 11 corresponding to the lower side of the outer peripheral edge 13a of the electrode 13, a closed portion 16 in which the burner flame hole 12 is not formed is formed along the shape of the outer peripheral edge 13a, so that combustion is not performed. Not possible. By doing so, excessive temperature rise of this outer peripheral edge 13a can be suppressed.

In this way, the electrode 13 of the burner body 11
The closing portion 1 is located at a portion corresponding to the lower side of the outer peripheral edge 13a of the
6, combustion does not occur in the closed portion 16, and an excessive rise in temperature of the outer peripheral edge 13a of the electrode 13 can be prevented. By doing so, the temperature difference between the central portion and the outer peripheral edge 13a of the electrode 13 can be alleviated, and the electrode 13 can be set as close to the burner body 11 as possible.

Moreover, by preventing excessive temperature rise of the outer peripheral edge 13a of the electrode 13, local oxidation, deterioration, and deformation of the electrode 13 can be prevented when used for a long period of time.

From the above, the flame resistance at the electrode 13 can be stably detected over a long period of time under conditions as close as possible to the burner body 11.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is a perspective view of a burner showing an embodiment of the present invention, and FIG. 2 is a plan view thereof, in which a chain double-dashed line a indicates the position of the electrode on the ceramic burner body. FIG. 3 is a sectional view of the burner, FIG. 4 is a plan view showing the entire burner, and FIG. 5 is a front view of the liquid fuel vaporization type combustor.

As shown in the figure, the burner of the liquid fuel vaporization type combustor has a burner main body 11 formed with a large number of burner flame holes 12, an electrode 13 arranged above the burner flame holes 12, and an electrode 13 near the outer periphery of the electrode 13. A part of the burner flame hole 12 is closed, and an electrode flame hole 14 is formed in the electrode 13.

As shown in FIGS. 4 and 5, the burner main body 11 is
a mixing pipe 18 having an intake port 17 for taking in vaporized fuel from the carburetor 15 and primary air, and the mixing pipe 1
8, and a ceramic burner plate 21 disposed in the upper opening 20 of the upper burner part 19, and a large number of burner flame holes 12 are bored in the burner plate 21. .
The electrode 13 is made of a substantially rectangular metal plate that protrudes from a part of the upper burner section 19 toward the burner plate 21 side. The electrode 13 is placed at a position as indicated by the two-dot chain line a in FIG.

The burner flame hole 12 is closed at a portion 16 directly below the outer circumferential edge 13a of the electrode 13 in the burner body 11, and the closed portion 16 is formed in a U-shape to match the outer circumferential edge 13a of the electrode 13.

In addition, in Figures 4 and 5, 23 is a frame rod,
24 is a peeler, 25 is a solenoid for opening and closing the nozzle of the carburetor 15, and 26 is a combustion flame.

In the above configuration, the liquid fuel is vaporized in the vaporizer 15, and the vaporized fuel is combusted on the burner flame hole 12 of the upper burner section 19 through the intake port 17 of the burner main body 11, through the mixing pipe 18. The flame resistance is then measured between the electrode 13 and the flame rod 23.

However, since the upper side of the burner flame hole 12a directly below the metal electrode 13 is covered with the electrode 13, the supply of oxygen is insufficient, and the vaporized fuel cannot rise and burn. electrode flame hole 1
Burns on 4.

Moreover, since there is no burner flame hole 12 on the burner plate 21 directly below the outer peripheral edge 13a of the electrode 13, the temperature rise of this outer peripheral edge 13a is suppressed.

In this way, by providing the portion 16 without the burner flame hole 12 on the burner body 11, the electrode 1
Electrode 1 due to temperature increase near the outer peripheral edge 13a of 3
The oxidation, deterioration, and deformation of 3 can be prevented, and stable detection of frame resistance can be obtained.

Further, even if an electrode having the same structure as above is used as the electrode of the igniter, the same effect can be obtained, and the distance between the electrodes can be stabilized. In other words, the igniter is
Ignition is caused by spark discharge between an ignition electrode (+ side high voltage electricity) such as the flame rod shown in FIGS. 4 and 5 and a mesh (- side electrode) such as a metal burner plate. In this case as well, if the metal plate serving as one side electrode is a ceramic burner, a new electrode is required, but if the electrode 13 and burner body 11 are configured as described above, the electrode 1
3 deformation can be prevented. Particularly for the electrode 13 of the igniter, since the distance between the electrodes has an important meaning, it is practically important to prevent the deformation thereof.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, the electrode 13 is not limited to a metal plate, but may be a mesh-like wire gauze, and its shape is not limited to a plate shape, but may be a rod shape.

<Effects of the invention> As is clear from the above explanation, according to the invention, an electrode made of a metal plate is arranged above the burner flame hole of the burner body, and a large number of electrode flame holes are formed on the electrode.
A closed part where the burner flame hole is not formed is placed in the part of the burner body corresponding to the lower side of the outer peripheral edge of the electrode.
Since it is formed along the shape of the outer periphery, combustion does not occur in the closed portion, and an excessive rise in temperature at the outer periphery of the electrode can be prevented. Therefore, the temperature difference between the central part and the outer periphery of the electrode can be alleviated, and the electrode can be set as close to the burner body as possible.

In addition, by preventing excessive temperature rise at the outer periphery of the electrode, local oxidation, deterioration, and formation of the outer periphery of the electrode can be prevented when the electrode is used for a long period of time.

From the above, it is possible to stably detect flame resistance using electrodes over a long period of time under conditions as close as possible to the burner body, which is an excellent effect.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a burner showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view thereof, Fig. 4 is a plan view showing the entire burner, and Fig. 5 is a front view of a liquid fuel vaporizing combustor,
FIG. 6 is a perspective view of a burner of a conventional liquid fuel vaporization type combustor, and FIG. 7 is a sectional view thereof. 11...burner body, 12...burner flame hole,
12a... Burner flame hole, 13... Electrode, 13a...
...outer rim, 14...electrode flame hole, 15...vaporizer,
16...Closing part, 17...Intake port, 18...Mixing pipe, 19...Upper burner part, 20...Top surface opening, 2
1...Ceramic burner plate.

Claims (1)

[Scope of utility model registration request] Many burner flame holes are formed in the burner body,
A burner for a liquid-fuel vaporization type combustor, in which an electrode made of a metal plate covering part of the burner body is arranged above the burner flame hole and a number of electrode flame holes are formed in the electrode, characterized in that a blocked portion in which no burner flame holes are formed is formed in the part of the burner body corresponding to the lower side of the outer peripheral edge of the electrode, following the shape of the outer peripheral edge.