JPH11159710A - Gas combustor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a time required for igniting a surface combustion type burner. SOLUTION: When an ignition button 10 is pressed fully, a gas flows from a main pipe 18 and a pilot pipe 19 a burner 30, and the burner 30 is directly spark-ignited from an electrode 22. Here, a gas is jetted from a pilot nozzle 21 in addition to a main nozzle 20, which speeds up gas concentration by the amount of increased gas, resulting in ignition in a short time. When the ignition button 10 is released, the ignition button 10 returns slightly to be locked, only a pilot valve 12 closing. So, the gas supply from the pilot nozzle 21 is stopped, and an optimum gas amount is supplied for combustion only from the main nozzle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas combustion apparatus for directly sparking and igniting a surface combustion burner.

[0002]

2. Description of the Related Art Conventionally, for example, a gas grill having a surface combustion type burner for burning a fuel gas near a surface of a ceramic plate having a large number of flame holes is known. The surface-burning type burner mixes all the air required for combustion with the fuel gas as primary air, blasts the mixture from the flame holes and burns near the surface of the ceramic plate, thereby glowing red light near the surface.

[0003]

Such a surface combustion type burner has a smaller flame hole load than a Bunsen burner because it draws in all the air necessary for combustion as primary air. It takes a long time for the gas concentration to rise to the ignitable gas concentration from the start of the supply, so that it is difficult to ignite, and in many cases, it is ignited by the flame of the pilot burner. In order to simplify the structure of the igniter, it is desirable that the igniter or the like be used for continuous continuous sparking to ignite, but in the state where the gas supply pressure is low or the burner is cold, the ignition is started after the ignition operation is started. It may take ten and several seconds, during which time the user must keep pressing the ignition button, which is inconvenient. In addition, power consumption increases due to sparking for a long time. An object of the present invention is to solve the above-mentioned problems and shorten the time required for ignition of a surface combustion type burner.

[0004]

According to a first aspect of the present invention, there is provided a gas combustion apparatus for supplying fuel gas required for combustion by injecting the fuel gas from a nozzle, and injecting the fuel gas from the nozzle. A burner body that forms a space where the fuel gas to be mixed with the primary air that is sucked along with the burner body, and a plate that is provided at the opening of the burner body and that forms a number of flame holes. Gas as a primary air, and a burner of a surface combustion type for burning near the surface of the plate, and igniting means for directly and continuously spark-igniting the burner, wherein the burner is provided separately from the gas supply means. The gist is that gas amount increasing means for supplying fuel gas into the burner main body only at the time of ignition is provided.

According to a second aspect of the present invention, there is provided a gas combustion apparatus according to the first aspect, wherein the gas injection nozzle of the gas amount increasing means is provided in parallel with the nozzle. Make a summary.

According to a third aspect of the present invention, there is provided a gas combustion apparatus according to the first aspect of the invention, wherein a gas injection nozzle of the gas amount increasing means is provided facing the ignition means. That is the gist.

[0007] In the gas combustion apparatus according to the first aspect of the present invention having the above-described structure, continuous spark ignition is directly performed on the surface combustion type burner by the ignition means. The surface combustion type burner draws all the air required for combustion as primary air, so the flame hole load is smaller than that of the Bunsen burner, and it takes time from the start of fuel gas supply until the gas concentration rises sufficiently. Although it is difficult to ignite, it is possible to increase the gas concentration quickly by supplying fuel gas into the burner main body by the gas amount increasing means only at the time of ignition of the burner, thereby making it easy to ignite. Further, during normal combustion after ignition, fuel gas is not supplied by the gas amount increasing means, and fuel gas in an amount suitable for combustion can be supplied by the gas supply means, so that combustion performance is not impaired. Here, the term “ignition” means a period during which the gas concentration is sufficiently increased, such as during the ignition operation, a predetermined time from the start of ignition, or until a predetermined condition is satisfied from the start of ignition. It is not limited to a particular event.

Further, the present invention has the above-mentioned structure.
The gas combustion device described above can mix the injected fuel gas efficiently by arranging the gas injection nozzle of the gas amount increasing means in parallel with the fuel gas supply nozzle. Also,
Since the negative pressure is generated by the injection of the fuel gas supply nozzle, there is no need to seal between the gas injection nozzle and the burner body.

Further, the present invention has the above-mentioned structure.
The gas combustion device described above can increase the gas concentration in the ignited portion by providing the gas injection nozzle of the gas amount increasing means facing the ignition means.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of a gas combustion apparatus according to the present invention will be described below. FIG. 1 shows the first embodiment of the present invention.
It is a schematic structure figure of a gas grill as an example. The gas grill includes an ignition button 10 for an ignition / extinguishing operation, a spindle 11 that slides in conjunction with the ignition button 10, a pilot valve 12 that opens and closes a gas flow path in accordance with the position of the spindle 11, and a main valve 13. And a magnet valve 14 that is energized while the flame is detected by a thermocouple (not shown) provided near the burner 30 to open the valve body by pushing and opening the valve body by the tip of the spindle 11 to adsorb and hold the open state. The micro switch 15 which is turned on during the pressing operation of the ignition button 10 to operate an ignition igniter (not shown) by the voltage of a dry cell (not shown), and slides up and down in conjunction with the left and right operations of a heating power adjustment knob 16. Needle valve 17
A main conduit 18 for supplying combustion gas to the burner 30 via the needle valve 17, and a pilot conduit 19 for supplying ignition gas to the burner 30 without passing through the needle valve 17.
A main nozzle 20 provided at the tip of the main conduit 18 for injecting gas, a pilot nozzle 21 provided at a tip of the pilot conduit 19 for injecting gas, and a burner 30 for burning gas.

The burner 30 is of a surface combustion type, and includes a burner body 31 for mixing the injected gas and primary air sucked at that time, and a ceramic having a plurality of flame holes 32a provided at the opening of the burner body 31. And a plate 32.

At the insertion portion of the main nozzle 20 and the pilot nozzle 21 of the burner main body 31, a damper 33 for adjusting the suction amount of the primary air is provided as shown in FIG. The main nozzle 2 is located at the center of the damper 33.
0 is inserted into the main hole 33a.
Around the primary air hole 33b for sucking primary air
However, a pilot hole 33c for inserting the pilot nozzle 21 is formed. When gas is injected from the main nozzle 20 to the burner main body 31, all the air necessary for combustion is mixed as primary air and ejected to the surface of the ceramic plate 32, and the ceramic plate 32 is activated by the operation of an ignition igniter (not shown). The electrode 22 provided in the vicinity of the surface continuously sparks and is directly ignited.

Next, the operation of the gas grill will be described. Pilot valve 12, main valve 13, magnet valve 1
When the ignition button 10 is fully pushed while both the valves 4 are closed, the spindle 11 moves and the pilot valve 12 and the main valve 13 are opened.
The magnet valve 14 is pushed open at the tip of the main conduit 1
Gas flows from 8 and pilot conduit 19 to burner 30. At this time, the micro switch 15 is turned on, and an ignition igniter (not shown) is operated, and the burner 30 is directly ignited by the spark from the electrode 22. At this time, since the gas amount is increased by the amount of gas injected from the pilot nozzle 21 in addition to the main nozzle 20, the gas concentration rises quickly, and ignition occurs in a short time. When a thermocouple (not shown) detects a flame, the open state of the magnet valve 14 is maintained. Thereafter, when the ignition button 10 is released, the ignition button 1
0 is slightly returned and locked, the tip of the spindle 11 returns to the position where the magnet valve 14 can be closed, and only the pilot valve 12 is closed with the main valve 13 kept open by the movement of the spindle 11. Give a valve. Therefore, the supply of the gas from the pilot nozzle 21 is stopped, and only the main nozzle 20 supplies the optimal gas amount for combustion.

As shown in the graph of FIG. 3, when the gas is supplied only by the main nozzle 20 as in the prior art, the rise in the gas concentration immediately after the start of the ignition operation is slow, and the time until the ignitable concentration is reached is reached. (8 seconds in the example of FIG. 3), the ignition button 10 must be kept pressed during that time. On the other hand, in the case of the present embodiment, the gas is also supplied from the pilot nozzle 21 during the pressing operation of the ignition button 10, so that the gas concentration rises quickly and the time required to reach the ignitable concentration is shortened. (Figure 3
2 seconds in the example).

Then, when the ignition button 10 is pressed again,
The lock is released and returns to the original position before the ignition operation, the main valve 13 is closed, the gas flow path is cut off, and the burner 30 is extinguished. When the extinguishing of the burner 30 is detected by a thermocouple (not shown), the magnet valve 14 is separated and closed.

As described above, according to the gas grill of the first embodiment, the gas is injected from the pilot nozzle 21 in addition to the main nozzle 20 at the time of the ignition operation, so that the gas concentration is quickly increased and the time until ignition is reached. Can be shortened, the time required for pressing the ignition button 10 can be shortened to improve the usability, and the operating time of the ignition igniter can be shortened to reduce the power consumption of the dry battery. . Further, when the ignition operation is completed, the gas is injected only by the main nozzle 20, so that the combustion performance is not impaired. In addition, a structure for igniting by a conventional pilot burner can be used, and the pilot burner itself is not required, so that the manufacturing cost can be reduced.

Next, a second embodiment will be described. FIG. 4 is a schematic configuration diagram of a gas grill as a second embodiment. The basic configuration is the same as that of the gas grill of the first embodiment (FIG. 1), but the insertion location of the pilot nozzle 21 is different. The same reference numerals are given to other overlapping portions, and description thereof will be omitted.

The pilot nozzle 21 is inserted at a position close to the electrode 22 on the back side of the burner main body 31 on the side of the ceramic plate 32, and a dispersion plate 23 for dispersing gas is provided on the gas ejection side of the pilot nozzle 21.
Further, the space between the pilot nozzle 21 and the burner main body 31 is sealed.

With such a configuration, gas is jetted from the pilot nozzle 21 in addition to the main nozzle 20 during the ignition operation. Then, the gas ejected from the pilot nozzle 21 is dispersed by the dispersion plate 23 to increase the gas concentration near the electrode 22. Therefore, the time required until ignition can be shortened.

As described above, according to the gas grill of the second embodiment, since the gas concentration in the ignited portion can be increased, a high effect can be obtained even if the gas amount from the pilot nozzle is small.

The shape of the dispersion plate 23 is not limited to a flat plate but may be, for example, an L-shape or a U-shape. Also, the dispersion plate 23
May not be provided.

The embodiment of the present invention has been described above.
The present invention is not limited to these embodiments at all, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

[0023]

As described in detail above, claim 1 of the present invention
According to the gas combustion apparatus described above, the configuration in which the supply amount of fuel gas is increased at the time of ignition can increase the gas concentration quickly and shorten the time required for the ignition operation, so that the usability is good and the spark time is shortened. Power consumption can be reduced. In addition, during normal combustion after ignition, no gas is supplied by the gas amount increasing means, and an amount of fuel gas suitable for combustion is supplied only by the gas supply means, so that combustion performance is not impaired.

Further, according to the gas combustion apparatus of the second aspect of the present invention, since there is no need to seal between the gas injection nozzle and the burner main body, the structure can be simplified.

Further, according to the gas combustion apparatus of the third aspect of the present invention, the ignition can be efficiently performed with a small amount of gas by employing a configuration in which the gas concentration in the ignition portion is increased.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a gas grill as a first embodiment.

FIG. 2 is a perspective view of a burner.

FIG. 3 is a graph showing a relationship between time and gas concentration.

FIG. 4 is a schematic configuration diagram of a gas grill as a second embodiment.

[Explanation of symbols]

10: ignition button, 11: spindle, 12: pilot valve, 13: main valve, 14: magnet valve,
21: Main nozzle, 22: Pilot nozzle, 30
... burner, 31 ... burner body, 32 ... ceramic plate.

Claims (3)

[Claims] 1. A gas supply means for injecting and supplying fuel gas necessary for combustion from a nozzle, and a burner forming a space in which the fuel gas injected from the nozzle and the primary air sucked along with the gas are mixed. A surface combustion type burner comprising a main body and a plate provided at an opening of the burner main body and forming a large number of flame holes, sucking all air necessary for combustion as the primary air and burning near the surface of the plate; An ignition means for continuously and continuously spark-igniting the burner, further comprising a gas amount increasing means for supplying a fuel gas into the burner main body only when the burner is ignited separately from the gas supply means. A gas combustion device characterized by the above-mentioned. 2. The gas combustion apparatus according to claim 1, wherein a gas injection nozzle of said gas amount increasing means is arranged in parallel with said nozzle. 3. A gas injection nozzle of said gas amount increasing means is provided facing said ignition means.
A gas combustion device as described.