JPS5945895B2 - gas burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a gas burner in which an ignition chamber is built into a burner body.

In a conventional gas burner, as shown in FIG. 1, for example, an igniter 5' is disposed outside the burner body 3', and a discharge electrode 8' of the igniter 5' is connected to the main flame port of the burner body 3'. It was facing 6'.

However, in such a conventional example, there is a disadvantage that the ignition device 5' is located outside, which makes the appearance bad.
There is a disadvantage that boiling liquid adheres to the electrode 8' and it becomes dirty, and a further disadvantage is that the discharge electrode 8' is constantly exposed to flame when the gas burner is used, resulting in severe deterioration of the discharge electrode 8'.

In order to compensate for this drawback, the burner body 3 as shown in FIG.
An ignition device 5' is disposed within the gas distribution chamber 9' which communicates with the mixing tube of '.
A gas burner has also been devised in which the discharge capacitor 8' of the igniter 5'' faces the inside of the main flame port 6'.

However, in such a device, only a primary mixture of gas and primary air is mixed in the gas distribution chamber 9.
It is difficult to ignite the mixed gas because it is supplied into the tank and ignites this mixed gas.

In other words, the primary mixed gas is combusted in the main flame port 6' with the secondary air of the outside air, so the gas concentration is high and the flow rate is high, so that it does not substantially ignite.

Even if the concentration of gas reaching the ignition holder flame port 6' was a little thin and the gas concentration within the ignition range could be instantaneously obtained, ignition would not be possible unless the ignition timing was very precisely determined.

Especially when the type of gas (city gas, propane gas, natural gas, etc.) changes, there is almost no possibility of ignition.

Another disadvantage is that the discharge electrode 8' is heated by the flame burning at the main flame port 6', resulting in severe deterioration of the discharge electrode 8'.

The present invention has been made in view of the above points, and the object of the present invention is that since the ignition device is located in the ignition chamber inside the burner body, it is not visible from the outside and has a good appearance, and the boiling liquid does not adhere to the ignition device. Of course, since the mixed gas flows into the ignition chamber partitioned by a partition wall and is ignited, the flow velocity of the mixed gas is slowed down, and the ignition device ensures ignition, and the ignition occurs within the ignition chamber. To provide a durable gas parser in which the ignited ignition device is not exposed to heat because the ignited flame is ejected like a blast from one ignition flame outlet and the gas from the flame port is ignited. .

The present invention will be explained in detail below with reference to Examples.

The annular burner body 3 is formed by placing a burner top 11 on a burner body 10.

The inner peripheral side of the burner body 3 may or may not be vertically penetrated.

A gas distribution chamber 9 is provided in the burner body 3 in an annular manner over substantially the entire circumference, and the mixing tube 1 is communicated with the gas distribution chamber 9 below the burner body 3 .

On the outer periphery of the burner top 11 of the burner body 3, a large number of main flame ports 6 serving as outer flame ports are provided in the circumferential direction, and on the inner periphery, a large number of main flame ports 6 serving as inner flame ports are provided in the circumferential direction. The main flame port 6 communicates with the inside of the gas distribution chamber 9.

Inverted U-shaped auxiliary flame passages 12 are provided on the outer and inner periphery sides of the burner body 3 between the burner top 11 and the burner main body 3, respectively. The auxiliary flame lower for the outer flame is bored in the shape of a slit, and the auxiliary flame path 12 on the inner peripheral side
A auxiliary flame lower for the inner flame is provided in the shape of a slit on the inner peripheral surface of the auxiliary flame, and the auxiliary flame []7 for the inner flame and the outer flame is connected to the gas distribution chamber 9.
It communicates with

An ignition chamber 2 partitioned by a partition wall 25 is provided in the gas distribution chamber 9 corresponding to the outlet of the mixing tube 1 of the burner body 10, and an ignition device storage space 26 is provided on the inner peripheral side of the ignition chamber 2. It is.

A communication hole 14 and a nozzle body 15 are provided between the mixing pipe 1 and the ignition chamber 2.
The mixed gas inlet 13 is connected to the mixed gas inlet 13.

This nozzle body 15 has an inflow groove 16 formed therein, and a nozzle opening 17 communicates with the inflow groove 16 .

An air inlet 18 is bored in the side wall ahead of the nozzle port 17, and a dowel bar 19 for opening and closing the air inlet 18 is attached to this air inlet 18.

An ignition device 6 consisting of a discharge electrode 8 and a ground electrode 20 is arranged in the ignition device storage chamber 26 in the ignition chamber 2, and the discharge electrode 8 is vertically inserted into the ignition device storage chamber 26 via an insulator 21. The ground electrode 20 is made of a corrosion-resistant metal such as stainless steel and is mounted by press-fitting it into a mounting hole 27 in the earthen wall of the igniter storage chamber 26.

When the ground electrode 20 is attached by press-fitting in this manner, the spark interval becomes stable.

This ignition device 5 is connected to a piezoelectric element or the like.

Ignition outlets 22 for outer and inner flames are provided on the outer and inner sides of the ignition chamber 2, respectively, and between the burner body 10 and burner top 11 of the burner body 3, the outer and inner flames are provided. A communication gap 23 is formed between the auxiliary flame lower which serves as the ignition flame outlet 4 for external flame ignition provided on the circumferential side, the auxiliary flame lower which serves as the ignition outlet 4 for internal flame ignition, and the ignition outlet 22. It is communicated via the auxiliary flame path 12.

Next, the operation of the gas burner constructed as described above will be explained.

When the gas cock is opened, gas mixed with primary air is supplied from the mixing tube 1 into the gas distribution chamber 6 of the burner body 3, and the gas is injected from the main flame ports 6 for the outer flame and the inner flame, and the inner flame Gas is injected from the auxiliary flame lowers for the internal and external flames, and on the other hand, gas flows into the ignition chamber 2 from the gas inlet 13.

At this time, if the ignition chamber 2 is located above the outlet of the mixing tube 1, no time is required for the gas to flow into the ignition chamber 2.

The gas that has flowed into the nozzle body 15 from the communication hole 14 of the mixed gas inlet 13 is injected from the nozzle port 17, and secondary air for heavy mixing is mixed in from the air inlet 18 due to the Venturi effect to ignite the gas in the ignition chamber 2. Filled with gas at an appropriate concentration.

At this time, the air inlet 1 is operated by the damper 19 depending on the gas.
Change the opening of No. 8 to obtain the appropriate gas concentration for ignition.

When the ignition chamber 2 is filled with gas, the ignition device 5 emits a spark and is ignited.

Then, like an explosion, the ignition flame is discharged from the ignition outlet 4 from the inner and outer ignition flame outlet 22 through the communication gap 23, and the gas coming out from the outer flame and inner flame auxiliary flame lowers is ignited. The lower gas flame ignites the gas emitted from the main flame lower for the outer flame and inner flame.

During this ignition, the gas coming out of the main flame port 6 and the auxiliary flame lower has a constant concentration and velocity.

Furthermore, during ignition, the gas flowing from the auxiliary flame lower is small and has a slow flow rate, and then the gas from the main flame port 6 is ignited, so ignition is carried out smoothly.

Since the ignition flame is discharged like an explosion from the ignition chamber 2 at the time of ignition, it does not burn within the ignition chamber 2 after ignition, and an auxiliary flame is formed from the ignition flame outlet 4 after ignition.

FIG. 6 shows another embodiment, in which the ignition outlet 22 communicates with the main flame port 6, so that the ignition flame is discharged into the main flame port 6 and ignites the gas exiting from the main flame port 6. It has become.

As described above, the present invention has the ignition device inside the ignition chamber inside the burner body, so it is not visible from the outside and has a good appearance, and of course there is no risk of boiling liquid adhering to the ignition device and reducing the ignition function. Since the mixed gas flows into the ignition chamber from the mixed gas inlet and is ignited, the mixed gas whose flow velocity has become slow is ignited and is reliably ignited.Moreover, the ignition flame ignited in the ignition chamber has an ignition flame flow. Since it is discharged like a blast from the outlet and ignited by the gas from the flame nozzle, it does not burn inside the ignition chamber and the ignition device is not exposed to heat, improving durability. Because of the gas distribution chamber, the mixed gas mixed with primary air can be supplied from the gas distribution chamber or the mixing tube of the burner body, making the supply route for the mixed gas easy to use, and the mixture being ejected from the flame port of the burner body. The same gas mixture can be used in common, eliminating unnecessary piping and parts, and the ignition flame outlet is communicated with the main flame outlet in the middle of the main path that communicates with the gas distribution chamber, so the ignition flame The outflow port is not exposed to the outside, and the ignition flame outflow port is prevented from being clogged by adhesion of boiling liquid to the ignition flame outflow port, and ignition can be reliably ignited over a long period of time.

In the combined invention of the present invention, the secondary air for heavy mixing is mixed into the mixed gas in the ignition chamber, and the gas concentration in the heavy mixing chamber becomes a concentration suitable for ignition, and the flow velocity in the heavy mixing chamber is slowed down. Not only can the ignition device ignite it reliably, but it can also be ignited even if the type of gas changes.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a conventional example, FIG. 2 is a schematic sectional view of another conventional example, FIG. 3 is a front sectional view of an embodiment of the present invention, and FIG.
Figure a is a plan view of the burner body as above, Figure 4 is Figure 4 a
4C is a side view of FIG. 4a, FIG. 4d is an A-A'+ analysis view of FIG. 4a, FIG. The figure is a sectional view of another embodiment same as above,
2 is an ignition chamber, 3 is a burner body, 4 is an ignition flame discharge port, 5 is an ignition device, 6 is a main flame port, and 7 is an auxiliary flame port.

Claims (1)

[Claims] 1. A gas distribution chamber in which a mixed gas containing primary air is distributed circumferentially within the annular burner body, and gas from the gaff distribution chamber is ejected in the circumferential direction of the outer surface of the burner body. In a gas burner equipped with a large number of flame ports, an ignition chamber partitioned by a partition is provided within the gas distribution chamber of the burner body, and an ignition device consisting of a discharge electrode and a ground electrode is provided in the ignition chamber. The ignition chamber is provided with a mixed gas inlet through which the gas flows and an ignition flame outlet through which the ignition flame ignited in the ignition chamber is discharged, and the ignition flame outlet is located in the middle of a key path that communicates the flame outlet with the gas distribution chamber. A gas burner connected to 2. A large number of main flame ports that eject the mixed gas from the gas distribution chamber of the burner body are provided in the circumferential direction of the burner body, and the ignition flame outlet is communicated with the main flame outlet in the middle of a key path that communicates with the gas distribution chamber. A gas burner according to claim 1, characterized in that the gas burner comprises: 3. A large number of main flame ports are provided in the circumferential direction of the upper part of the burner body for ejecting mixed gas from the gas distribution chamber of the burner body, and auxiliary flame ports are provided for ejecting a small amount of mixed gas from the gas distribution chamber compared to the main flame ports. Claim 1, characterized in that the burner body is provided in the circumferential direction below the main flame port, and the ignition flame outlet is communicated with the auxiliary flame port in the middle of a key path that communicates with the gas distribution chamber. Gas burner as described in section. 4. Any one of claims 1 to 3, characterized in that a discharge electrode is installed inside the ignition chamber, and a ground electrode facing the tip of the discharge electrode is press-fitted into a mounting hole in the wall of the ignition chamber. Gas burner listed. 5 A gas distribution chamber is provided in the annular gas burner body in which a mixed gas containing primary air is distributed in the circumferential direction, and a large number of flame ports are provided in the circumferential direction of the outer surface of the burner body through which gas from the gas distribution chamber is ejected. In the gas burner, an ignition chamber partitioned by a partition is provided in the gas distribution chamber of the burner body, and an ignition device consisting of a discharge electrode and a ground electrode is provided in the ignition chamber, and the mixed gas into which the mixed gas mixed with primary air flows. The ignition chamber is provided with an inlet and an ignition flame outlet through which the ignition flame ignited in the ignition chamber is discharged, and the ignition flame outlet is communicated in the middle of a key path that communicates the flame outlet and the gas distribution chamber. 1. A gas burner characterized in that an air inlet is provided in an ignition chamber through which secondary air for heavy mixing flows into the mixed gas flowing into the gas burner. 6. A nozzle port with a narrow diameter is provided in the ignition chamber to allow the mixed gas to flow into the ignition chamber, and an air inlet port through which secondary air for heavy mixing flows is provided on the side wall of the ignition chamber near the tip of the nozzle port. A gas burner according to claim 5. 1. The gas burner according to claim 6, characterized in that a plate-shaped damper is rotatably pivoted to the air inlet of the ignition chamber so that the air inlet can be opened and closed.