JPS6210322B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a burner having a plurality of flame holes on its circumference.

A conventional burner of this type is constructed as shown in FIGS. 1 and 2. That is, 1 is a burner, and a burner head 2 and a burner cap 3 covered by the burner head 2 are positioned by a positioning member 4 to prevent them from shifting in the radial direction, and are removably fitted together.
Fixed and configured. At this time, 5 is a flame hole provided on the circumference, and is constituted by a burner head 2 and a burner cap 3. 6 is a flame formed in the flame hole 5;
Reference numeral 7 indicates a pressure equalization chamber constituted by the burner head 2 and burner cap 3, 8 indicates the interval between the flame holes 5, and 9 indicates the flame holes 5 at a position corresponding to the support portion 4.
10 is the central part of the burner 1, 11 is concentric with the flame hole 5, and the burner is continuously arranged in a ring shape in the pressure equalizing chamber 7. This is a protrusion provided on the back surface of the cap 3.

Combustion in this case will be explained. The mixture of fuel and air is supplied into the pressure equalization chamber 7 and reaches the flame hole 5. At this time, when ignited, a flame 6 is formed and combustion begins. Let's take a look at the details of this combustion state and the flow state of the air-fuel mixture in the pressure equalization chamber 7.

When the flame holes 5 are arranged on the circumference at intervals of 8, the secondary air necessary for combustion in the central part 10 during combustion is generated by the flame 6 being continuously formed around the entire circumference of the burner 1, and the secondary air is It will no longer be supplied as it will act as a shielding wall. Therefore, in the central portion 10, there is insufficient supply of secondary air, resulting in incomplete combustion. On the other hand, if you try to supply the necessary secondary air to the central part 10,
The flame holes 5 must be arranged at intervals of 9. However, when they are arranged at intervals of 9, there is a drawback that when one flame hole 5 is ignited, the flame does not spread to the adjacent flame hole 5. In order to eliminate these contradictory drawbacks, the flame holes 5 are arranged on the circumference at intervals of 8 as shown in Figs. In the conventional burner 1, the flame did not transfer at intervals of 9, but the disadvantage was compensated for by forcing the flame to transfer using a pine etc. However, this disadvantage has not been completely eliminated, especially when the interval is 9, it was difficult for the flame to spread in that area, causing the problem that the flame would burn out. Furthermore, looking at the flow of the mixture in the pressure equalizing chamber 7, the mixture flows from the pressure equalizing chamber 7 to the flame hole 5 while being contracted by the convex portion 11 and reaches the flame hole 5. The convex portion 11 provides resistance to the air-fuel mixture by contracting the air-fuel mixture. This means that even if there is some amount of air mixture flowing in the pressure equalization chamber 7 to each flame hole 5, resistance acts to slow down the flow once, and the amount of air mixture flowing to each flame hole 5 is reduced. Make equal. At the same time, the pressure of the mixture flowing into each flame hole 5 decreases due to the resistance. Therefore, since the amount of air mixture supplied to each flame hole becomes equal, there is no difference in the speed of ejection from each flame hole 5 depending on the amount of air mixture, and a partial lift phenomenon occurs depending on the amount of air mixture. After that, stable combustion was achieved.

The present invention eliminates the drawbacks of the conventional insufficient supply of secondary air and the lack of flame transfer, and takes advantage of the structure for stable combustion.It prevents insufficient supply of secondary air to the center of the burner, and The purpose of this is to spread the flame between the flame holes and evenly distribute the air-fuel mixture to the flame holes.

In order to achieve this object, the present invention provides a small flame hole that is smaller than other flame holes at a position corresponding to the positioning body.

With this configuration, the flame formed in the burner is continuously formed through small flames formed in the small flame holes. As a result, there is no possibility that the flame will not transfer between the flame holes. In addition, the small flame formed in the small flame hole is for facilitating the transfer of flame, so it is very small compared to other flames. Therefore, flames are formed continuously around the burner, but since the flames formed in the small flame holes are small flames,
It no longer acts as a shield against the secondary air supply to the center of the burner. Therefore, the necessary amount of secondary air is supplied to the central part, resulting in complete combustion. In addition, because the small flame hole was provided downstream of and corresponding to the positioning body with respect to the air-fuel mixture flow direction in the burner, the mixture supplied to the small flame hole was once positioned. It collides with the body and is decompressed and supplied. Therefore, even if the small flame holes are provided, the amount of air-fuel mixture supplied to the small flame holes will be reduced, and the jetting speed of the air-fuel mixture from the small flame holes will be reduced, thereby preventing the lift phenomenon from occurring.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. In the drawings, parts having the same functions as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

The burner 1 includes a small flame hole 12 provided corresponding to the positioning body 4, and a small flame 13 formed in the small flame hole 12. Incidentally, the intervals between the flame holes 5 and the intervals between the flame holes 5 and the small flame holes 12 are arranged at intervals of 8 as described in the conventional example.

Next, the combustion state of the burner 1 with the above configuration will be explained. The air-fuel mixture flowing from the pressure equalization chamber 7 to the small flame hole 12 is temporarily stopped at the convex part 11 on the way.
The amount supplied to each flame hole 5 and small flame hole 12 becomes equal, and then collides with the positioning body 4 and is depressurized.
Therefore, the amount of the air-fuel mixture supplied to the small flame hole 12 provided downstream of the positioning body 4 in the flow direction of the air-fuel mixture decreases, forming a small flame 13 and combusting it.

In this way, by providing the positioning body 4 and the small flame hole 12 in correspondence, the flame 6 formed in the burner 1 and the small flame 13 are continuous. Therefore, when the burner 1 is ignited, the flame transfers easily. Also,
Since the small fire is very small, it does not provide a shield wall for the secondary air supply to the central section 10;
The required amount of secondary air can be supplied to the
Therefore, the burner 1 performs complete combustion without incomplete combustion due to lack of air.

Further, FIG. 7 shows another embodiment. This embodiment has exactly the same functions and effects as the previous embodiment, except that the positioning body 4 is provided on the line of the protrusion 11 on the ring.

As described above, according to the burner of the present invention, by making the flame hole at the position corresponding to the positioning body smaller than the other flame holes and making it a small flame hole, when the burner is ignited, it is easy to completely burn the flame. Since the flame transfers to the periphery to maintain and continue combustion, and at the same time supplies the necessary secondary air to the center of the burner, it eliminates the problem of flame transfer as in the past and improves the combustion of the burner. It is effective.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional burner, and Figure 2 is a cross-sectional view of a conventional burner.
3 is a sectional view of a burner showing an embodiment of the present invention; FIG. 4 is a sectional view of the burner cap shown in FIG. 3; FIG. 5 is a plan view of the burner cap shown in FIG. 4; FIG. 6 is an enlarged view of the flame hole in FIG. 4, and FIG. 7 is a plan view of a burner cap showing another embodiment. 1... Burner, 2... Burner head, 3... Burner cap, 4... Positioning body, 5... Flame hole, 7
... Pressure equalization chamber, 11 ... Convex portion, 12 ... Small flame hole.

Claims (1)

[Scope of Claims] 1. Covering the burner head with a burner cap, arranging a large number of flame holes on the outer periphery of both, and communicating with the flame holes to form a pressure equalizing chamber between the burner head and the burner cap, A plurality of positioning bodies protruding into this pressure equalizing chamber prevent the burner head and burner cap from shifting in the radial direction, and the flame hole at the position corresponding to the position determination is connected to the other flame hole. A burner that is smaller and has a smaller flame hole. 2. The burner cap according to claim 1, wherein a continuous ring-shaped protrusion is provided in the pressure equalizing chamber concentrically with the flame hole and located at the same position as the positioning body or on the upstream side. Burna.