JPS6242251Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas burner, and more particularly to a gas burner that is mainly used in a gas range and has an ignition source inside.

Generally, this type of gas burner has an ignition chamber containing an ignition source, and a pilot flame is obtained by introducing a mixture of gas and air into the ignition chamber and igniting it with the ignition source. However, the supply of natural gas has been increasing recently, and even though this natural gas requires an air volume close to the theoretical air volume, it takes time to replace the gas and air in a normal ignition chamber, It is becoming difficult to approach the amount of air.

The present invention was developed in view of the above points, and its main purpose is to feed a sufficient amount of air into the ignition chamber to facilitate the ignition of the pilot flame. The purpose of this is to provide a gas burner that stabilizes the flame emitted from the flame hole and is unlikely to cause fanning or backfire.

Hereinafter, embodiments of the present invention will be described based on the drawings. The gas burner according to the present invention has a side wall of a burner body 2 which is formed in a substantially cylindrical shape and whose bottom surface communicates with a mixing tube 1 for mixing gas and air, and has a large number of flame holes that communicate with the inside and outside of the burner body 2 over the entire circumference. 3 opens,
An ignition chamber 5 containing an ignition source 4 is provided inside the side wall, and the ignition chamber 5 communicates with a pilot hole 6 opened in the side wall of the burner body 2 along with the flame hole 3, and also connects the mixing tube 1 and the pilot hole. An inflow hole 7 for introducing the mixture into the ignition chamber 5 is provided on the substantially shortest flow path of the mixture connecting the ignition chamber 5 and the ignition chamber 5. In this example, the first
As shown in the figure, an example is shown in which the mixing tube 1 is in the shape of a straight tube that hangs down from the 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 into the lower end thereof, and a burner body 2 is connected to the upper end thereof. A primary air suction hole 9 is opened on the side surface of the lower end of the mixing tube 1, and when gas is ejected from the nozzle 8 into the mixing tube 1, air is taken into the mixing tube 1 from the primary air suction 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 in the mixing tube 1 and sent into the burner body 2 connected to the upper end of the mixing tube 1. As shown in FIGS. 1 and 2, the burner main body 2 includes a burner body 10, a burner cap 11, and a rectifying plate 12.
Equipped with etc. As shown in FIG. 5, the burner body 10 is formed into a dish shape whose diameter gradually increases from the bottom to the top, and a mixing vent 13 opens at the bottom and is connected to the mixing tube 1 from the periphery of the opening. The connecting cylinder portion 14 projects downward. burna body 1
A stepped portion 15 is provided on the outer edge of the upper end portion of the burner body 1 over substantially the entire circumference in the circumferential direction.
It is formed over substantially the entire circumference in the circumferential direction of 0. Further, a spacer rib 17 protrudes from an appropriate position on the upper end surface of the vertical wall of the stepped portion 15, and the tip of the spacer rib 17 comes into contact with the back surface of the burner cap 11. Step portion 15
A portion of the vertical wall is cut out, and a substantially circular fitting rib 19 is provided inside the stepped portion 15 corresponding to the cutout 18 . As shown in FIG. 6, 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 thin to reduce resistance to the outflow of the air-fuel mixture from the flame hole 3.
The flame hole 3 is made narrow in order to prevent backfire or fanning from occurring easily due to this. Also, a part of the side wall of the burner cap 11 is cut out and the pilot hole 6 is cut out.
is formed. Support ribs 21 protrude from appropriate positions on the lower surface of the side wall of the burner cap 11. A screw 22 is screwed into the boss 20 at the center of the burner cap 11, and the current plate 12 is attached by the screw 22. As shown in FIG. 7, the current plate 12 is formed into a dish shape whose diameter gradually increases from the lower end to the upper end, and a part of the outer periphery is cut out in an arc shape to provide a fitting part 23. ing. The current plate 12 is attached to the burner cap 11 so that the fitting portion 23 corresponds to the pilot hole 6. Fitting receiving part 23
The ignition chamber 5 is attached to the ignition chamber 5. As shown in FIG. 8, the ignition chamber 5 has a cylindrical shape with an opening at the bottom, and a pilot flame discharge port 24 is provided in a part of the side wall of the ignition chamber 5.
is opened, and a long inflow hole 7 is formed along the circumferential direction in the side wall facing the pilot fire discharge port 24. Ignition chamber 5
A pointed tip 25 is protruding from the center of the lower surface of the holder. The lower end of this ignition chamber 5 is a burner body 10.
The burner cap 11, on which the current plate 12 is attached, is fitted onto the inside of the fitting rib 19 of the burner cap 11. At this time, the pilot flame hole 6 of the burner cap 11 and the pilot flame discharge port 24 of the ignition chamber 5 are arranged so as to match. In addition, the inflow hole 7 is connected to the pilot fire outlet 24.
The inflow hole 7 is located on the substantially 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 pilot hole 6 through the ignition chamber 5 are discharged through the same path. Therefore, the flow rate of the air-fuel mixture passing through the ignition chamber 5 is high, and the exchange of the air-fuel mixture in the ignition chamber 5 is quick. The lower end of the burner cap 11 matches the stepped portion 15 of the burner body 10. An insertion hole 26 for inserting an ignition source 4 that generates sparks from the tip is opened at a position corresponding to the ignition chamber 5 of the burner body 10, and an ignition source 4 attached to a mounting base 27 fixed to the upper end of the mixing tube 1 is opened. The upper end of the source 4 is inserted into the ignition chamber 5 from the insertion hole 26 of the burner body 10.
inserted within. In this way, the upper end of the ignition source 4 and the tip 25 of the ignition chamber 5 are arranged to face each other, and by generating a spark between the two, the air-fuel mixture in the ignition chamber 5 is ignited. The flame ignited in the ignition chamber 5 is discharged from the starter hole 6 and transferred to the air-fuel mixture discharged from the flame hole 3, thereby forming a flame in the flame hole 3. At this time,
The flame discharged from the pilot hole 6 continues to burn one by one, and since the opening area of the pilot hole 6 is larger than that of the flame hole 3, the pilot hole 6 becomes the main flame hole. It is something. By the way, as mentioned above, the burner body 10 has the spacer rib 1.
7 is provided in a protruding manner, and a support rib 21 is provided in a protrusive manner on the burner cap 11.
As a result, a gap 28 is formed between the stepped portion 15 of the burner body 10 and the lower end of the burner cap 11. Therefore, a portion of the gas-air mixture passes through the relief groove 16 and is discharged from the gap 28. As a result, even if the flame formed in the flame hole 3 is extinguished by wind, etc., the flame formed through the relief groove 16 is difficult to fan and will not be extinguished. The flame returns to the flame hole 3 immediately and is safe.

As mentioned above, the present invention is designed so that the pilot hole is opened in the side wall of the burner body in line with the flame hole, and the mixture is introduced into the ignition chamber on the shortest flow path for the mixture connecting the mixing tube and the pilot hole. This has the advantage that the flow rate of the mixture passing through the ignition chamber becomes faster, and as a result, the exchange of the mixture in the ignition chamber becomes faster, making ignition easier even when using natural gas. be.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention, Fig. 2 is an exploded perspective view showing the burner main body used in the above, and Fig. 3 is a perspective view from the bottom side showing the burner main body used in the above. , Fig. 4 is a perspective view from the top side showing the burner body used in the above, Fig. 5 a, b
6A, B, and C are longitudinal sectional views, a partial plan view, and a partial side view, respectively, showing the burner cap used in the above, and FIG. Figures a and b are a plan view and a fragmented side view showing the rectifying plate used in the above, respectively, and Figures 8a and b are a bottom view and a sectional view taken along line A-A in figure a, respectively, showing the ignition chamber used in the same. It is. 1 is a mixing tube, 2 is a burner body, 3 is a flame hole, 4 is an ignition source, 5 is an ignition chamber, 6 is a starter hole, and 7 is an inlet hole.

Claims (1)

[Scope of utility model registration request] The side wall of the burner body, which is formed into a roughly cylindrical shape and whose bottom surface communicates with a mixing tube that mixes gas and air, has numerous flame holes that penetrate inside and outside the burner body all around the circumference, and an ignition source is located inside the side wall. An ignition chamber with a built-in ignition chamber is provided, and the ignition chamber communicates with the pilot hole that opens in the side wall of the burner body in line with the flame hole, and the mixture is placed on the almost shortest flow path of the air-fuel mixture connecting the mixing tube and the pilot hole. A gas burner having an inflow hole for introducing air into the ignition chamber.