JPH0229399Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

TECHNICAL FIELD The present invention relates to a gas burner used mainly in gas ranges and the like.

[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 opening 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 downward, there are some gas burners that do not have the above-mentioned cavity and are formed into a disk shape. As the broth flows down the sides of the gas burner and into the saucer, there is a problem in that the broth flows into the main flame opening and flame holding opening provided on the side of the gas burner and clogging the main flame opening and flame holding opening.

[Means to solve the problem]

In the gas burner of the present invention, the entire surface of the upper surface is closed, and the closed upper surface is provided with a protrusion 17 that protrudes upward from the upper surface.
A burner port 15 is formed around the entire outer circumference of the burner top 1, which has a hole drilled therein, and a recess 16 is provided at the center of the upper surface of the burner top 1, which is lower than the circumference of the top surface. It is characterized by forming a discharge groove 4 whose bottom surface slopes downward toward a location where no discharge groove is provided.

[Effect]

In the present invention, as described above, the recess 16 is provided in the center of the upper surface of the burner top 1, and the discharge groove 4 is formed from the recess 16.
Therefore, even if the boiling liquid spills on the upper surface of the burner top 1, it will be collected in the recess 16 without flowing out around the upper surface of the burner top 1. The boiling liquid is discharged into the saucer outside the burner top 1 through the drain groove 4, and therefore the flame opening 15 is not clogged with boiling liquid or the like.

【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 burner port 15 consisting of a main burner port 3 and a flame holding port 2 is formed on the circumferential surface of the burner top 1. That is, on the outer peripheral surface of the burner top 1, between the burner cap 8 and the burner body 7, that is, in the lower part of the outer peripheral surface of the burner cap 8, a flame holding port 2 is recessed in a substantially annular shape. 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. Above each flame holding port 2, a large number of slit-shaped main flame ports 3 are bored at regular pitches.
are arranged in a comb-like manner on 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. The upper surface of the burner cap 8 is provided with a mortar-shaped recess 16 that is lower in the center than the surrounding area, so that the boiling liquid spilled on the upper surface of the burner cap 8 does not fall from around the burner cap 8 and flows into the recess 16. It is now possible to collect them. A drain groove 4 is formed from the recess 16 diagonally downward toward the part between the flame holding ports 2 where there is no flame holding port 2, and the drain groove 4 extends from the upper surface of the burner cap 8 to the outer periphery. They are formed radially in three places across the surface. Furthermore, the center of the recess 16 is spherically protruded upward, so that the boiling liquid and the like do not accumulate in the recess 16 and are all discharged from the drain groove 4. Further, protrusions 17 are provided on the upper surface of the burner cap 8 to protrude along both sides of the discharge groove 4, and the upper surface of the burner cap 8 and the discharge groove 4 are connected to the protrusion 17.
It is divided by 7. On the other hand, this discharge groove 4 also has the function of introducing secondary air to the upper surface of the burner cap 8, and the bottom surface of the discharge groove 4 is a flame holding hole on the outer peripheral surface of the burner cap 8, as shown in FIG. 2
The flame from the flame holding port 2 rises into this exhaust groove 4, and secondary air is introduced to the top surface of the burner cap 8. has become unimpeded. As shown in FIG. 5, an inner flame opening 5 consisting of a set of adjacent large diameter holes 12 and small diameter holes 13 is bored in the portion of the protrusion 17. In the illustrated example, the large diameter hole 12 and the small diameter hole 13 of the inner flame opening 5 are located at the center side, but the small diameter hole 13 may be located at the opposite position from the illustrated example. A protrusion 14 is provided extending toward the outer circumferential side from the upper end of the main flame port 3 on both sides of the discharge groove 4 on the outer circumferential surface of the burner cap 8. As shown in FIG. A flame guide groove 6 is bored horizontally so as to communicate with the upper end of the flame port 3 and toward the mating protrusion 14 . A supply hole 11 is opened in the lower surface of the burner body 7 to which a mixed gas of gas and air is supplied.
The upper end of a pipe-shaped gas supply pipe (not shown) is caulked to fix the pipe. 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 from the exhaust groove 4 to the upper surface of the burner top 1 and burns inside. As a result, gas is combusted in a wide range from the burner top 1 by the flame of the main flame port 3 and the flame of the inner flame port 5. Moreover, the small diameter hole 1 of the inner flame port 5
The mixed gas jetted out from the burner top 1 at a high flow rate creates a negative pressure on the upper surface of the burner top 1, which causes air to be forcibly sucked through the exhaust groove 4 as shown in Figure 4, resulting in a lack of oxygen at the inner flame opening 5. This prevents incomplete combustion. In this way, the small diameter hole 13
When the mixed gas is ejected at high speed from the small diameter hole 13, the flame in the small diameter hole 13 intermittently burns intermittently, causing a so-called lift phenomenon.However, the flame in the large diameter hole 12 also comes out in the vicinity, and the flame in the small diameter hole 13 burns intermittently. The lift phenomenon is eliminated by mixing with the flame of the large diameter hole 12.
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 in the main flame port 3 is reliably prevented from burning out. 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 is caused to run horizontally, as shown in Fig. 3. As the flames in the adjacent flame guiding grooves 6 intersect with each other, the flame holding ports 2 are also connected, and the flames in the main flame opening 3 and the flame holding port 2 in any area are connected once. Even if the flame goes out, the flame in other parts is immediately guided and re-ignited, so that the burner top 1 can perform stable combustion. Note that the secondary air flowing through the exhaust groove 4 passes under the flame of the flame guide groove 6.

[Effect of the idea]

As described above, the present invention is characterized in that the entire surface of the top surface is closed, and a protrusion is provided on the closed top surface that protrudes upward from the top surface, and an inner flame opening is bored in the protrusion so that the entire outer circumference of the burner top is covered almost entirely. forming a flame vent,
A recess is provided in the center of the upper surface of the burner top, which is lower than the periphery of the top surface, and a drain groove is formed diagonally downward from this recess toward the area on the outer periphery of the burner top where there is no flame opening. In burner tops that are closed and have a concave central part and do not have vertically penetrating openings for supplying secondary air in the center, secondary air is supplied to the inner flame opening on the upper surface of the burner top using a discharge groove. It is possible, and
In supplying this secondary air, the exhaust groove is slanted so that the secondary air can be supplied more smoothly.Also, even if boiling liquid or the like spills on the top of the burner top, the secondary air will not reach the center of the burner top. Not only is there no risk of the air flowing downward from the through opening and contaminating the area below, unlike when air is supplied through the upper and lower openings, but the air is collected in the recess without flowing out around the upper surface of the burner top.
The boiling liquid collected in the recess is discharged into the broth receiving tray outside the burner top through the drain groove provided in the part without the flame opening, so that the boiling liquid etc. will not clog the flame opening. There is no possibility that the flame port will become clogged and the flame will not come out. In this way, in the case of the present invention, there is a passageway that smoothly supplies secondary air to the inner flame opening provided on the upper surface of the burner top with the upper surface closed, and a passageway in the center of the burner top with the upper surface closed. There is an advantage that the concave portion can also serve as a passage for smoothly flowing the broth flowing into the broth receiving tray.

[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 discharge groove and flame guide groove and the state of the flame, and Figure 4 is the same as above.
XX sectional view in the figure, Fig. 5 is a plan view of the same as above, Fig. 6
The figure is a perspective view showing the same flame guide groove as described above, and 1 is a burner top, 4 is a discharge groove, 15 is a flame opening, and 16 is a recess.

Claims (1)

[Scope of utility model registration request] The entire surface of the upper surface is closed, and a protrusion that protrudes upward from the upper surface is provided on the closed upper surface, and an inner flame opening is formed in the protrusion to form a flame opening on almost the entire outer periphery of the burner top. A gas burner comprising a recessed portion lowered than the periphery of the upper surface in the center of the upper surface, and a discharge groove whose bottom surface slopes downward from the recessed portion toward a portion of the outer periphery of the burner top where no burner port is provided.