JPS6222743Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas burner, and more particularly to a gas burner equipped with an ignition source therein, which is mainly used in gas ranges.

Generally, in this type of gas burner, the main flame hole through which the flame ignited by the ignition source is discharged and each flame hole are spaced apart from each other. It may be difficult for the flame to transfer to the holes, and the flame may not transfer smoothly between the flame holes. If the flame does not transfer smoothly, gas will leak from unlit flame holes and produce a bad odor, and when the flame transfers to such flame holes, the gas that leaks around the flame hole will The flame may also spread to other objects, causing explosive ignition and making a loud noise.

The present invention was developed in view of the above points, and its main purpose is to smooth the transition of flame between the main flame hole and between the flame holes at the time of ignition. Another purpose is to quickly restore the flame even if the flame formed in the flame hole is extinguished by wind or other factors.

Hereinafter, embodiments of the present invention will be described based on the drawings. The gas burner according to the present invention includes a burner body 2 formed in a flat cylindrical shape and connected to a mixing pipe 1, and an ignition source 4 disposed within the burner body 2. Along the direction, a main flame hole 6 that discharges the flame ignited by the ignition source 4 to the outside of the burner body 2 corresponds to the ignition source 4, and a plurality of longitudinal flame holes 3 that penetrate inside and outside the burner body 2. one auxiliary flame hole 28 that is continuous over the entire circumferential circumference of the burner body 2 and penetrates inside and outside of the burner body 2;
A step portion 15 is formed in which the lower ends of the main flame hole 6 and each flame hole 3 communicate with each other and bend the flow path between the inside of the burner body 2 and the auxiliary flame hole 28. In this embodiment, as shown in FIG.
An example is shown in which the burner body 2 has a straight pipe shape hanging down from the lower bottom surface of the burner body 2. The mixing tube 1 has a straight tube shape that runs vertically, and a nozzle 8 for ejecting gas is inserted at the lower end.
A burner body 2 is connected to the upper end. A primary air intake hole 9 is opened on the side surface of the lower end of the mixing tube 1, and a nozzle 8
When the gas is ejected into the mixing tube 1, air is taken into the mixing tube 1 from the primary air intake hole 9 due to the Bench-Lily effect. At this time, since the mixing tube 1 is straight, there is little resistance to the outflow of gas from the nozzle 8, and therefore the amount of air taken in is also increased. The gas and air are mixed while rising inside the mixing tube 1, and then the burner body 2 is connected to the upper end of the mixing tube 1.
sent within. As shown in FIGS. 1 and 2, the burner main body 2 includes a burner body 10, a burner cap 11, a current plate 12, and the like. The burner body 10 is formed into a substantially inverted conical shape whose diameter gradually increases from the bottom to the top. A mixing vent 13 is opened at the bottom surface of the burner body 10, and a connecting cylinder portion 14 is connected to the mixing pipe 1 from the periphery of the opening.
protrudes downward. A stepped portion 15 is provided on the outer edge of the upper end portion of the burner body 10 over substantially the entire circumference in the circumferential direction, and a large number of ventilation grooves 16 running in the vertical direction are provided on the vertical wall of the stepped portion 15 approximately in the circumferential direction of the burner body 10. Formed all around. Further, from an appropriate position on the upper end surface of the vertical wall of the stepped portion 15, the spacer rib 17
protrudes, and the tip of the spacer rib 17 comes into contact with the back surface of the burner cap 11. A portion of the vertical wall of the stepped portion 15 is cut out, and the stepped portion 15 corresponds to the cutout 18.
A substantially circular fitting rib 19 is provided inside. Therefore, the flow path between the burner body 2 and the auxiliary flame hole 28 is bent due to the stepped portion 15, and the flow resistance in this flow path is increased to lower the gas flow rate and the gas flow rate. ing. In other words, if the flow resistance between the burner body 2 and the auxiliary flame hole 28 is small, when the flame in the main flame hole 6 or the flame hole 3 fluctuates due to fluctuations in gas pressure, etc., a flame is formed in the auxiliary flame hole 28. The flame will also fluctuate in the same way, but by increasing the flow resistance, a buffering effect will act, and the flame formed in the flame auxiliary hole 28 will be prevented from fanning or backfiring, and the small flame will be will be formed stably. As a result, the auxiliary flame hole 28 is designed to smooth the transition of the flame between the main flame hole 6 and the flame hole 3, and to quickly return the flame formed in the flame hole 3 even if it is extinguished by wind. The purpose of this can be achieved. The burner cap 11 has a flat cylindrical shape with an open bottom, and a boss 20 protrudes from the center of the bottom. A large number of vertically long flame holes 3 are provided on the side wall of the burner cap 11 over the entire circumference of the burner cap 11. The opening periphery of the flame hole 3 is formed thinly so that the flame hole 3
This reduces the resistance to the outflow of the air-fuel mixture. For this reason, the flame hole 3 is made narrow to prevent backfire and fanning. A part of the side wall of the burner cap 11 is cut out to form the main flame hole 6. The support rib 2 is located at an appropriate position on the lower surface of the side wall of the burner cap
1 stands out. A screw 22 is screwed into the central boss 20 of the burner cap 11, and the rectifying plate 12 is attached by the screw 22. The current plate 12 is formed into a substantially inverted conical shape whose diameter gradually increases from the lower end toward the upper end, and a portion of the outer circumferential portion is cut out in an arc shape to provide a fitting receiving portion. The rectifying plate 12 is attached to the burner cap 11 so that the fitting portion thereof corresponds to the main flame hole 6. An ignition chamber 5 is attached to the fitting part. Ignition chamber 5
has a cylindrical shape with an open bottom, a pilot flame discharge port 24 opens in a part of its side wall, and a long inlet hole 7 is formed in the side wall facing the pilot flame discharge port 24 along the circumferential direction. A pointed tip 25 is provided protruding from the center of the lower surface of the ignition chamber 5. The lower end of the ignition chamber 5 is fitted inside the fitting rib 19 of the burner body 10, and the burner cap 11 to which the current plate 12 is attached is fitted from above. At this time, the main flame hole 6 of the burner cap 11 and the pilot flame outlet 2 of the ignition chamber 5
4 are arranged so that they match. Further, the inflow hole 7 is located on the opposite side from the pilot fire outlet 24,
The inflow hole 7 is located on substantially the shortest flow path of the air-fuel mixture connecting the pilot flame discharge port 24 and the mixing tube 1. That is, the mixture discharged from the flame hole 3 and the mixture discharged from the main flame hole 6 through the ignition chamber 5 are discharged through the same path. Therefore, the amount of air-fuel mixture flowing into the ignition chamber 5 is
It becomes proportional to the amount of air-fuel mixture discharged from the
However, as mentioned above, since the mixing tube 1 is straight and the opening periphery of the flame hole 3 is made thin, the flow rate of the air-fuel mixture from the flame hole 3 increases, and as a result, the flow rate of the air-fuel mixture into the ignition chamber 5 increases. This means that sufficient air-fuel mixture will be delivered. The lower end of the burner cap 11 matches the stepped portion 15 of the burner body 10. An insertion hole 26 for inserting a spark plug 29 is opened in the burner body 10 at a position corresponding to the ignition chamber 5 . This spark plug 29 and the pointed head 25 constitute an ignition source 4, and the air-fuel mixture in the ignition chamber 5 is ignited by a discharge spark formed between the two. The spark plug 29 is attached to a mounting base 27 whose lower end is fixed to the upper end of the mixing tube 1 . The flame ignited in the ignition chamber 5 is discharged from the main flame hole 6 through the pilot flame discharge port 24, and the flame is transferred to the air-fuel mixture discharged from the flame hole 3 to form a flame in the flame hole 3. By the way, as mentioned above, the spacer ribs 17 are provided protruding from the burner body 10, and the burner cap 11
Since support ribs 21 are provided protruding from the support ribs 17 and 21, a flame reinforcement hole 28 is formed between the stepped portion 15 of the burner body 10 and the lower end edge of the burner cap 11. That is, a part of the mixture of gas and air passes through the ventilation groove 16 and is discharged from the auxiliary flame hole 28 . The auxiliary flame hole 28 is formed over the entire circumference of the burner body 2 in the circumferential direction, and the lower ends of the main flame hole 6 and the flame hole 3 communicate with the auxiliary flame hole 28 . As a result, the main flame hole 6
When the flame formed in the flame is transferred to the air-fuel mixture discharged from the flame hole 3, the flame is transferred to the air-fuel mixture discharged from the auxiliary flame hole 28, quickly circulates around the entire circumference of the burner body 2, and is discharged from the flame hole 3. The flame is definitely transferred to the mixture.
Thereby, the flame hole 3 is reliably ignited, and gas leakage due to a delay in ignition can be prevented from causing a bad odor or loud noise. Furthermore, the flame formed in the main flame hole 6 and the auxiliary flame hole 28 continues to burn even after ignition, and even if the flame formed in the flame hole 3 is extinguished by wind etc., the flame formed in the main flame hole 6 and the auxiliary flame hole 28 will continue to burn. Since the flame formed in the flame hole 28 is rarely fanned and never goes out,
These flames quickly return the flame to the flame hole 3, making it safe.

As described above, the present invention includes a main flame hole and a plurality of flame holes that are spaced apart from each other along the circumferential direction on the side circumferential surface of the burner body, and one supplementary flame hole that is continuous over the entire circumferential circumference of the burner body. Since the main flame hole and one end of each flame hole communicate with the flame hole, at the time of ignition, the flame formed in the main flame hole transfers to the air-fuel mixture discharged from the auxiliary flame hole, and the flame flows from the flame hole. The flame is transferred to the air-fuel mixture to be discharged, and the flame transition is continuous and smooth, and there is no delay in ignition. This has the advantage that the time delay is reduced, during which time there is almost no gas leakage, and there is no odor or explosion noise caused by gas leakage. Furthermore, the lower ends of the main flame hole and each flame hole communicate with one auxiliary flame hole that extends all the way around the burner body and penetrates the inside and outside of the burner body, and the lower ends of the main flame hole and each flame hole communicate with each other. Since a stepped portion is formed that bends the flow path between the two, the flow resistance in this flow path increases, the gas flow rate decreases, and the gas flow rate decreases. In other words, by increasing the flow resistance, a buffering effect acts, preventing the flame formed in the auxiliary flame hole from fanning or backfiring, and allows a small flame to be stably formed. It is. As a result, the flame dislocation between the main flame hole and the flame hole is smoothed, and
Even if the flame formed in the flame hole is extinguished by wind or the like, the original purpose of the auxiliary flame hole, which is to quickly return the flame, can be fully achieved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an exploded perspective view of the burner body used in the above, Figure 3 is a perspective view from the bottom side showing the burner body used in the same as the above, and Figure 4 is a perspective view from the top side showing the burner body used in the same as the above. , 1 is a mixing tube,
2 is a burner main body, 3 is a flame hole, 4 is an ignition source, 6 is a main flame hole, and 28 is an auxiliary flame hole.

Claims (1)

[Scope of utility model registration request] The burner body has a flat cylindrical shape and is connected to a mixing pipe, and an ignition source is arranged inside the burner body. A main flame hole that discharges the flame ignited by the burner body to the outside of the burner body, and a plurality of longitudinal flame holes that penetrate the inside and outside of the burner body are spaced apart and are continuous all the way around the burner body in the circumferential direction. The lower ends of the main flame hole and each flame hole communicate with one auxiliary flame hole that penetrates the inside and outside of the burner body, and a stepped portion is formed that bends the flow path between the burner body and the auxiliary flame hole. Gas burner.