JPS6347687Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to gas burners used mainly in gas ranges, etc., and relates to a technology that prevents broth from leaking below the gas burner and allows the flame to burn over a wide range. It is.

[Conventional technology and its problems]

Conventional gas burners are donut-shaped, with a main flame port and a flame holding port on the outer periphery, and an inner flame port on the inner periphery, and air is supplied to the inner flame port from the central cavity. Was. However, since this type of gas burner has a cavity in the center for supplying air, boiling liquid may spill downward from this cavity, staining the inside of the gas range below the gas burner, or causing rust. There was a problem that it could occur.

On the other hand, in order to prevent the boiling liquid from spilling downwards, there are gas burners that are shaped like a disk without the cavity described above, but in such gas burners, there is a flame holding port that is formed in an annular shape around the outer periphery of the gas burner. The gas combusting at the main flame port forms an air curtain, cutting off the air supply to the inside.For this reason, air cannot be supplied to the inside of the main flame port, and an inner flame port cannot be provided. First, the combustion range of the gas was narrow, making it impossible to uniformly heat a wide range.

[Means for solving problems]

In the gas burner of the present invention, a flame holding port 2 is formed almost all around the outer circumference of a burner top 1, and a plurality of main flame holes 3 are formed above the flame holding port 2 at appropriate pitches along the outer circumference of the burner top 1. A secondary air introduction groove 4 is formed from a location on the outer periphery of the burner top 1 where the flame holding port 2 is not provided toward the upper surface of the burner top 1, and water diameter holes 12 are formed on both sides of the secondary air introduction groove 4 on the upper surface of the burner top 1, respectively. Inner flame opening 5 consisting of a pair with small diameter hole 13
It is characterized by forming.

[Effect]

In the present invention, as mentioned above, the flame holding port 2 is provided around the entire circumference of the burner top 1, so that the main burner port 3 is prevented from burning out. 1 Since the secondary air introduction groove 4 is provided from the outer periphery toward the inner flame opening 5, air can be passed through the secondary air introduction groove 4 and into the inner flame opening 5 even if the gas burner is shaped like a doughnut and a hollow part is not provided in the center. The gas burner can be uniformly burned over a wide area by the flame of the main flame port 3 and the flame of the inner flame port 5, and the gas burner is shaped like a donut and has a hollow part in the center. This is not necessary and the center can be closed to prevent boiling liquid from leaking out. In addition, since the inner flame port 5 is composed of a set of a small diameter hole 13 and a large diameter hole 12, by ejecting gas at a flow rate higher than that of the small diameter hole 13, the upper surface side of the burner top 1 is made to have a negative pressure, and the secondary air is Air can be forcibly introduced from the introduction groove 4, and incomplete combustion of gas at the inner flame port 5 can be prevented.
Furthermore, when the small diameter hole 13 is narrowed down, the flame is intermittent, causing a so-called lift phenomenon, but this lift phenomenon is prevented because the large diameter hole 12 is provided in close proximity, which allows the flame to burn steadily. It is possible.

〔Example〕

As shown in FIG. 2, the burner top 1 is formed into a hollow disk shape by placing a spherical net 10 inside a saucer-shaped burner body 7, and fitting a lid-shaped burner cap 8 onto the burner body 7 from above. As shown in Fig. 1, it is a boiling liquid prevention type and does not have a cavity in the center for supplying air from the inside. A flame holding port 2 is recessed in a substantially annular shape between the burner cap 8 and the burner body 7 on the outer circumferential surface of the burner top 1, that is, in the lower part of the outer circumferential surface of the burner cap 8. In the illustrated example, the flame holding port 2 is separated into three parts, and there are three portions (between the ends of the flame holding port 2) where there is no flame holding port 2. A large number of slit-shaped main flame ports 3 are bored at regular pitches above each flame holding port 2, and the main flame ports 3 are arranged in a comb-like manner above the flame holding port 2. .
In addition, small gas outlet holes 9 are opened at regular pitches in the bottom of the flame holding port 2 in communication with the lower end of the main flame port 3, and gas is supplied from the small gas outflow holes 9 to the flame holding port 2. has been done. Secondary air introduction grooves 4 are formed radially at three locations from the outer peripheral surface to the upper surface of the burner cap 8 in a portion where there is no flame holding port 2 between the flame holding ports 2. As shown in Fig. 4, the bottom surface of the secondary air introduction groove 4 is inclined upward from a location on the outer peripheral surface of the burner cap 8 at approximately the same height as the flame holding port 2 toward the top surface of the burner cap 8. The flame from the flame holding port 2 rises into this secondary air introduction groove 4, so that the introduction of secondary air to the upper surface of the burner cap 8 is not obstructed. The broth and the like are discharged through this secondary air introduction groove 4 onto a soup receiving tray (not shown) on the outer periphery. Weir-like protrusions 15 are provided on both sides of the secondary air introduction groove 4 on the upper surface of the burner cap 8, and as shown in FIG.
An inner flame opening 5 consisting of a pair of a small diameter hole 13 and a small diameter hole 13 is bored. In the illustrated example, the inner flame opening 5 is arranged such that the large diameter hole 12 is located on the outer peripheral side and the small diameter hole 13 is located on the inner peripheral side, but the arrangement may be reversed from the illustrated example. Projections 14 are protruded toward the outer circumference from the upper ends of the main flame ports 3 on both sides of the secondary air introduction groove 4 on the outer circumferential surface of the burner cap 8, and as shown in FIG. A flame guide groove 6 is bored horizontally in communication with the upper end of the main flame port 3 and toward the mating protrusion 14 . A supply hole 11 through which a mixed gas of gas and air is supplied is opened on the lower surface of the burner body 7, and the upper end of a pipe-shaped gas supply pipe (not shown) is fixed to this supply hole 11 by caulking. .

When the gas mixture is supplied into the burner top 1 from the supply hole 11, the gas mixture is ejected from the main flame port 3, consumes oxygen in the atmosphere, and spreads toward the outer circumference and burns. On the other hand, the mixed gas ejected from the inner flame port 5 consumes the air supplied to the upper surface of the burner top 1 from the secondary air introduction groove 4 and burns inside. As a result, the flame of main flame port 3 and the inner flame port 5
The flame causes gas to burn over a wide area from the burner top 1. Moreover, the mixed gas jetted out at a high flow rate from the small diameter hole 13 of the inner flame port 5 creates a negative pressure on the upper surface of the burner top 1, which causes air to be forced out from the secondary air introduction groove 4 as shown in FIG. This prevents incomplete combustion due to lack of oxygen at the inner flame port 5. When the mixed gas is ejected from the small diameter hole 13 at high speed in this way, the flame in the small diameter hole 13 intermittently burns intermittently, causing a so-called lift phenomenon. Flame of small diameter hole 13 and large diameter hole 1
The lift phenomenon is eliminated by mixing with the second flame. Because the flame burns in an almost annular shape in the flame holding port 2, for example, even if the flame in a part of the main flame port 3 goes out, other main flame ports 3 will burn through the flame in the flame holding port 2. The flame in the flame port 3 is transferred and ignited immediately, and the flame burnout in the main flame port 3 is reliably prevented. Moreover, even though there is a part where the flame holding port 2 is cut, the flame rising from the main flame port 3 at the end reaches the flame guide groove 6 and the flame runs horizontally.
As shown in the figure, since the flames in adjacent flame guiding grooves 6 intersect with each other, each flame holding port 2 is also connected to each other, and the main flame port 3 and flame holding port 2 in any region are connected to each other.
Even if the flame in the burner top 1 goes out all at once, flames in other areas are immediately guided and re-ignited, so that the burner top 1 can perform stable combustion. Note that the secondary air flowing through the secondary air introduction groove 4 passes under the flame of this flame guiding groove 6.

[Effect of idea]

As described above, this invention has flame holding ports provided almost all around the burner top, which prevents the main flame opening from burning out.Furthermore, between the flame holding ports, the inner flame opening can be opened from the outer periphery of the burner top. Since the secondary air introduction groove is provided facing toward the main flame opening, air can be supplied to the inner flame opening through the secondary air introduction groove, even though flame holding openings are provided almost all around the circumference. It is possible to burn gas uniformly over a wide area with the flame of the inner flame and the flame of the inner flame opening, and there is no need to make the gas burner into a donut shape and provide a hollow part in the center to supply air to the inner flame opening. Therefore, it has the advantage of blocking the center to prevent boiling liquid from leaking out. In addition, since the inner flame port is composed of a set of a small diameter hole and a large diameter hole, the gas flow rate ejected by the small diameter hole can be increased and air can be forcibly sucked in from the secondary air introduction groove. It is possible to prevent incomplete combustion of the gas at the inner flame opening, and the large-diameter holes are provided to allow the flame to burn steadily in close proximity, eliminating the lift of the flame that occurs due to the high gas flow rate at the small-diameter holes. It has the advantage of being able to prevent

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is an exploded perspective view, Figure 3 is a front view showing the secondary air introduction groove and flame guide groove and the state of the flame, and Figure 4 is a front view showing the state of the flame.
The figure is a sectional view taken along the line X-X of FIG. 3, FIG. 5 is a plan view of the same as above, and FIG. main flame mouth,
4 is a secondary air introduction groove, 5 is an inner flame opening, 12 is a large diameter hole, and 13 is a small diameter hole.

Claims (1)

[Scope of utility model registration request] A flame holding port is formed almost all around the outer periphery of the burner top, and a plurality of main flame holes are formed above the flame holding port at appropriate pitches along the outer periphery of the burner top. A secondary air introduction groove is formed from the point to the top of the burner top,
A gas burner in which inner flame ports each consisting of a set of large-diameter holes and small-diameter holes are formed on both sides of a secondary air introduction groove on the upper surface of the burner top.