JPH09133360A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion device in which its ignition may easily be carried out even in case that a body of burner is kept at its cooled state, a stable combustion state can be assured and at the same time its configuration is simple. SOLUTION: An ignition device 27 near a flame port 22 of a burner body 24 is provided with an air flow resistor 28 acting as an easy igniting configuration means at a position opposing against the flame port 22. Fuel pre-mixed gas is stayed under striking against the air flow resistor 28, a flowing-in of the surrounding atmosphere is restricted to enable an easy ignition to be realized by a simple configturation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner ignition device that uses gas or petroleum as a fuel.

[0002]

2. Description of the Related Art A conventional combustion device will be described below.

As shown in FIG. 8, a ceramic burner 81
There is a configuration in which an ignition burner 83 is separately provided toward the vicinity of the combustion surface of the burner main body 82 in which is arranged (see, for example, Japanese Utility Model Laid-Open No. 4-14909).

In this structure, when an ignition switch or the like is operated to ignite the burner main body 82, fuel is simultaneously supplied to the burner main body 82 and the ignition burner 83, and at the same time, the fuel is provided in the vicinity of the flame port of the ignition burner 83. The ignition means composed of a discharge plug or the like is actuated, and a spark thereof forms a flame in the ignition burner 83, and the burner main body 82 is ignited by the flame, and fuel is supplied to the ignition burner 83 after the ignition is completed. The burner main body 82 is stopped and combustion continues. Therefore, the ignition burner 83 is required as a separate structure, and the fuel passage and the fuel switchgear have a complicated structure.

Further, as shown in FIG. 9, the burner body 91
There is a configuration in which an ignition heater 93 in which a resistance wire 92 is embedded in heat resistant ceramics is provided in the vicinity of the surface on the downstream side of the fuel premixture (for example, see Japanese Patent Laid-Open No. 302519/1990).

In this structure, the ignition of the burner body 91 is performed by bringing the fuel premixture discharged from the burner body 91 into contact with the ignition heater 93, which has been energized and whose temperature has risen to the red heat level. In this case, the burner main body 91 is directly ignited, but since the burner main body is in a cooling state at the initial stage of ignition, for example, air is sucked by the mixing pipe and is supplied to the burner main body 91 as a premixed fuel, so-called natural In the case of combustion, the air tends to be excessive in the initial stage, and the outside air around the burner body 91 also flows in to cause excess air, which makes it difficult to ignite. Therefore, a situation such as ignition delay or explosion ignition may occur. In order to prevent this, there is a method of reducing the amount of intake air at the beginning of ignition,
During steady combustion, the temperature of the burner body 91 rises, resulting in a shortage of air, which may cause adverse effects such as an increase in carbon monoxide emissions. In addition, it is necessary for the heater for ignition to be constantly in the flame.
If 3 is present, the ignition heater 93 itself is deteriorated or damaged, so that the ignition heater 93 is inevitably installed at a position distant from the burner body 91, and ignition tends to be more difficult.

[0007]

As described above, in the structure in which the ignition burner 83 is separately provided to ignite the conventional burner body 82, the fuel passage and the fuel switchgear have a complicated structure. There are points, and the burner body 9 directly
In the configuration for igniting No. 1, since the ignition is performed in the cooling state and the ignition heater 93 is installed away from the burner main body 91, there is a tendency for excess air to ignite due to the inflow of outside air. It is difficult to do so, and there are problems such as ignition delay and explosion ignition. Therefore, if the amount of intake air at the initial stage of ignition is reduced to prevent ignition delay or explosion ignition, there is a problem that the burner main body 91 lacks air during normal combustion, causing combustion failure.

An object of the present invention is to solve the above-mentioned problems of the prior art, and it is possible to easily realize ignition even when the burner main body is in a cooled state and to reduce the unburned components such as carbon monoxide and the like. It is an object of the present invention to provide a simple combustion device having a structure capable of ensuring a proper combustibility.

[0009]

In order to achieve the above object, the present invention provides a burner body provided with a flame port, and a burner body in the vicinity of the flame port and on the downstream side where the fuel premixture flows. Ignition means, and easy ignition constituting means for forming a state in which ignition by the ignition means is easy.

Therefore, in the combustion apparatus of the present invention, the ignition means can easily ignite the ignition means.

As an easily ignitable constituent means, during the ignition operation by the ignition means, the fuel premixed gas having a higher concentration of mixed fuel than that during the steady combustion after ignition is automatically circulated to the flame mouth of the burner body. Since the fuel in the fuel premix contains a large amount of fuel only at the time of the ignition operation, ignition can be easily performed.

Further, as the easy ignition constituent means, one in which the flow velocity of the fuel premixture at the flame port at the ignition position is made slower than the flow velocity of the fuel premixture flowing to the other flame port portion is the flame at the ignition position. Since the fuel premixture has a low flow velocity in the mouth portion, the fuel premixture stays and air does not flow from the surroundings.
Therefore, ignition is facilitated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a burner body provided with a flame opening, and an ignition means provided in the vicinity of the flame opening of the burner body and on the downstream side where the fuel premixture flows. And an easy-ignition constituent means for forming a state in which the ignition means can easily ignite.

According to the above-mentioned invention, the fuel is easily ignited because it is provided with the particularly easy ignition constituent means.

The invention according to claim 2 is the fuel device according to claim 1, wherein the easy ignition constituent means has a concentration of mixed fuel during ignition operation by the ignition means more than during steady combustion after ignition. The rich fuel pre-mixture is automatically made to flow through the flame mouth of the burner body.

According to the above-mentioned invention, the fuel pre-mixture having a higher concentration of mixed fuel containing a larger amount of fuel than during steady combustion is automatically circulated to the burner body at the flame port only during the ignition operation. It is easy to ignite.

According to a third aspect of the present invention, in the combustion apparatus according to the second aspect, the easy ignition constituent means includes a combustion switchgear connected to the burner body by a fuel passage, and the ignition means and the fuel switchgear are provided. Is electrically connected to the burner body during the ignition operation of the ignition means to supply a larger amount of fuel to the burner body than the maximum amount of fuel supplied to the burner body during steady combustion after ignition. Excessive fuel is supplied to the burner body so that it can be ignited easily, and after the end of ignition, it burns after reducing to the original maximum amount of fuel in the burner body, causing combustion failure such as carbon monoxide emission. Nor does it require an ignition burner.

Further, the invention according to claim 4 is the combustion apparatus according to claim 1, wherein the easily ignitable component has a flow port of the fuel premixture at another flame port at a flame port corresponding to an ignition position. By adopting a means for making the flow rate of the fuel premixture flowing slower, ignition by the ignition means is facilitated.

According to a fifth aspect of the present invention, in the combustion apparatus according to the fourth aspect, an airflow resistor is provided as a readily ignitable constituent means at a position facing the flame port of the ignition means.

Therefore, the fuel premixture ejected from the flame port collides with the airflow resistor and stays between the airflow resistor and the flame port, and at the same time the inflow of outside air can be suppressed.
Easy ignition can be realized with an extremely simple structure.

According to a sixth aspect of the invention, in the combustion apparatus according to the fifth aspect, the airflow resistor is provided with a vent hole. Therefore, the heat capacity of the airflow resistor is reduced and carbon monoxide is less likely to be generated even if it contacts the flame.As a result, the airflow resistor can be brought closer to the flame port, and the flame port with less inflow of outside air Ignition positions can be formed in the vicinity.

The invention according to claim 7 is the combustion apparatus according to claim 4, wherein the flame caliber of the combustion plate in the vicinity of the ignition means is arranged from the upstream side of the fuel premixture to the downstream side as the easy ignition constituting means. It is a continuous enlargement to the side.

Therefore, the flow velocity of the fuel pre-mixture passing through the flame port of the combustion plate near the ignition means slows down as it progresses to the downstream side. Since the flame diameter on the upstream side of the board is small, it is possible to prevent flashback during combustion.

The invention according to claim 8 is the combustion apparatus according to claim 4, wherein recesses are provided in the vicinity of the ignition means as the easy ignition constituent means and on the surface of the combustion plate on the downstream side of the fuel premixture. Is provided. Therefore, the ignition means can be brought close to the flame port, the premixed fuel mixture is retained in the concave portion, the inflow of the outside air is suppressed, and the ignition can be easily performed.

The invention according to claim 9 is directed to a burner body having a plurality of combustion discs provided with flame openings, and an ignition means provided near the flame openings of the burner body and downstream of the fuel premixture. And a combustion detection means, and a fuel switchgear electrically connected to the combustion detection means, the ignition means is provided on one combustion board side near the boundary between the combustion boards, and is different from the combustion board provided with the ignition means. Combustion detecting means is provided in the vicinity of the combustion plate, and the plate thickness of the flame port arrangement portion on the downstream side of the fuel premixture near the boundary between the combustion plates is formed thin.

Therefore, the ignition means can be brought close to the combustion board, and the fuel premixture is retained at the boundary of the combustion board near the ignition means to suppress the inflow of the outside air, so that the ignition and the fire transfer can be easily performed. Not only can it be realized, but it can be confirmed whether or not the fire has transferred to another combustion board provided with the combustion detection means.

Further, the invention according to claim 10 includes a burner body having a plurality of combustion discs provided with flame openings, and an ignition means provided near the flame openings of the burner body and downstream of the fuel premixture. Combustion detection means and a fuel switchgear electrically connected to the combustion detection means are provided, and ignition means is provided on one combustion board side near the boundaries between the combustion boards, and is different from the combustion board provided with the ignition means. Combustion detection means is installed in the vicinity of the combustion plates, and grooves are provided on the boundaries between the combustion plates from the upstream side to the downstream side of the fuel premixture to maintain the mechanical strength at the boundaries of the combustion plates. However, since the fuel premixture also flows out from the groove, the amount of fuel increases in the vicinity of the ignition means, and not only ignition and fire transfer can be easily realized, but also combustion to another combustion board provided with combustion detection means. You can check whether it has moved.

The invention according to claim 11 is the combustion device according to any one of claims 1 to 10, wherein a plurality of flames forming sparks between the discharge electrode and the power receiver are used as ignition means. By providing the mouth, it is possible to provide a simple ignition device without separately requiring an ignition burner.

(First Embodiment) A first embodiment of the combustion apparatus of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, at the opening of the burner case 1, there is a burner body 4 accommodating a ceramic combustion board 3 having a plurality of penetrating flame ports 2. The burner body 4 has a fuel passage 5 Via a push-button ignition switch 6, and is connected to a fuel opening / closing device 7 as an easily ignitable constituent means, and is connected to a power source part 8 in the vicinity of a surface of the burner main body 4 on the downstream side of the fuel premixture. An igniter 11 as an igniting means is provided, which is provided with a discharge electrode 9 that has been discharged and a power receiver 10 made of metal, which is spaced at a constant interval. The igniter 11 and the fuel opening / closing device 7 are electrically connected via an ignition switch 6. It is a configuration. Further, a needle valve 12 connected to the ignition switch 6 by a cam (not shown) or the like is provided in the fuel opening / closing device 7, and
As shown by the solid line, when the ignition switch 6 is pressed to perform the ignition operation, the needle valve 12 is fixed at the set position of the fuel amount during ignition (corresponding to about 1.5 times the maximum fuel amount during steady combustion),
As shown by the dotted line in FIG.
After releasing the pressure and backing up, the needle valve 12 is fixed at a set position equal to or less than the maximum fuel amount during steady combustion.

As described above, according to the first embodiment, the ignition device 11 is energized while the ignition switch 6 is being operated, and sparks are continuously generated between the discharge electrode 9 and the power receiver 10.
At the same time, the fuel opening / closing device 7 as the easy ignition component operates, and the needle valve 12 is fixed at the set position of the ignition fuel amount equivalent to about 1.5 times the maximum fuel amount during steady combustion. Since the fuel premixture having a high fuel concentration and being in a state of being easily ignited is discharged from the above, ignition is easily completed by the spark. Further, after the ignition is completed, the needle valve 12 is fixed at a set position equal to or less than the maximum fuel amount during steady combustion, so that the steady combustion is performed with a fuel amount suitable for stable combustion. Therefore, stable combustion can be realized without causing combustion failure such as carbon monoxide emission during steady combustion. It should be noted that the ignition fuel amount is set to be about 1.5 times the steady state maximum fuel amount, for example, in the case of gas fuel or the like, a stable ignition state is obtained even when the supply gas pressure is reduced to the minimum gas pressure. This is to ensure that. For example, in the case of the 13A gas, when the standard gas pressure is lowered to the minimum gas pressure, the fuel amount is reduced to about 70%. However, according to the configuration of the present invention, even at this time, the steady state at the standard gas pressure is ignited. Since a fuel amount higher than the maximum fuel amount during combustion can be secured, stable ignition can be realized.

(Second Embodiment) A second embodiment of the combustion apparatus of the present invention will be described below.

As shown in FIG. 2, at the opening of the burner case 21, there is a burner main body 24 which houses a ceramic burner 23 provided with a plurality of penetrating flame openings 22. In the vicinity and on the downstream side of the fuel premixture, a metallic power receiver 2 made at a constant distance from the discharge electrode 25.
6 is provided with an igniting device 27 as an igniting means, and the igniting device 27 has a structure in which an airflow resistor 28 as an easily ignitable constituting means is integrally formed with a power receiving body 26 at a position facing the flame port 22.

As described above, according to the second embodiment, when the ignition device 27 is energized, sparks are continuously generated between the discharge electrode 25 and the power receiver 26, and at the same time, the fuel jetted from the flame outlet 22 is discharged. The premixed gas collides with the airflow resistor 28 as an easy ignition component, stays between the airflow resistor 28 and the flame port 22, and the inflow of outside air is suppressed. Since it can be held, ignition can be easily realized by the spark and a simple ignition structure can be obtained.

(Third Embodiment) A third embodiment of the combustion apparatus of the present invention will be described below.

As shown in FIG. 3, at the opening of the burner case 31, there is a burner body 34 accommodating a ceramic combustion plate 33 having a plurality of flame openings 32 penetrating therethrough. In the vicinity and on the downstream side of the fuel pre-mixture, a metallic power receiver 3 made at a constant distance from the discharge electrode 35.
6 is provided with an ignition device 37 as an ignition means. The ignition device 37 has an airflow resistor 38 as an easily ignitable constituent means integrally formed with the power receiver 36 at a position facing the flame outlet 32. In this configuration, a plurality of ventilation holes 39 are provided.

As described above, according to the third embodiment, when the ignition device 36 is energized, a high-voltage discharge is generated between the discharge electrode 9 and the power receiver 35, and a spark is generated near the flame port 32 of the burner body 34. Are continuously formed, and at the same time, the fuel premixed gas ejected from the flame port 32 collides with the airflow resistor 37 as an easy ignition constituent means, stays between the airflow resistor 37 and the flame port 32, and Is suppressed, the fuel concentration of the fuel premixture can be maintained, so that ignition can be easily realized by the spark and a simple ignition configuration can be realized. In this case, a part of the fuel premixture flows out from the air vent 38, but the heat capacity of the air flow resistor 37 is reduced by providing the air vent 38, so that even if the air flow resistor 37 is brought close to the flame port 32 The generation of carbon oxide can be suppressed, and the ignition operation can be performed in the vicinity of the flame port 32 where the inflow of outside air is small and the fuel concentration is high.

(Embodiment 4) Embodiment 4 of the combustion apparatus of the present invention will be described below.

As shown in FIG. 4, at the opening of the burner case 41, there is a burner body 44 accommodating a ceramic burner 43 provided with a plurality of penetrating flame ports 42. On the downstream side of the premixed gas, an ignition device 47 as an ignition means including a discharge electrode 45 and a metallic power receiver 46 spaced at a constant interval is provided, and a flame diameter in the vicinity of the ignition device 47 is set to an easy ignition component. As a result, the ignition flame port 48 is continuously enlarged from the upstream side to the downstream side of the fuel premixture.

As described above, according to the fourth embodiment, when the ignition device 47 is energized, sparks are continuously generated between the discharge electrode 45 and the power receiver 46, and at the same time, the fuel flame is discharged from the ignition flame port 48. The air-fuel mixture is released. At this time, the ignition flame port 48 as the easy ignition constituting means has the flame diameter continuously increased from the upstream side to the downstream side of the fuel premixture, so that the ejection speed of the fuel premixture gradually reaches the downstream side. It falls and stays near the ignition device 47. Therefore, the amount of outside air drawn in is small and the fuel concentration in the vicinity of the ignition device 47 can be secured, so that easy ignition can be realized. Further, the flame diameter on the upstream side of the ignition flame port 48 is almost the same as that of the flame port 22, so that flashback can be prevented.

(Fifth Embodiment) The fifth embodiment of the combustion apparatus of the present invention will be described below.

As shown in FIG. 5, at the opening of the burner case 51, there is a burner body 54 containing a ceramic burner 53 provided with a plurality of penetrating flame ports 52. An ignition device 57 is provided on the downstream side of the premixed air as an ignition means composed of a discharge electrode 55 connected to the power supply unit 8 and a metal power receiver 56 spaced at a constant interval, and a ceramic combustion board near the ignition device 57. The concave portion 58 is provided on the downstream side of the fuel premixture 53 as an easy ignition constituting means.

As described above, according to the fifth embodiment, when the ignition device 57 is energized, sparks are continuously generated between the discharge electrode 55 and the power receiver 56, and at the same time, the fuel burnout from the ceramic burner 53 is performed. The air-fuel mixture is released. At this time, since the fuel premixture stays in the recess 58 as the easy ignition component, the fuel concentration in the vicinity of the ignition device 57 can be secured, and by providing the recess 58, the ignition device 57 can be protected. Since it can be placed close to the ceramic combustion board 53, easy ignition can be realized.

(Sixth Embodiment) A sixth embodiment of the combustion apparatus of the present invention will be described below.

As shown in FIG. 6, the burner case 64 accommodates two ceramic combustion plates 63a and 63b each having a plurality of penetrating flame openings 62 at the opening of the burner case 61.
Therefore, the plate thickness M of the surface on the downstream side of the fuel premixture near the boundary between the ceramic burners 63a and 63b is made thin as the easy ignition constituting means. Further, on the surface of the ceramic combustion plate 63a near the boundary on the downstream side of the fuel premixture, an ignition device 67 as an ignition means including a discharge electrode 65 and a metallic power receiver 66 at a constant interval is provided. Combustion detection means 69 including a thermocouple electrically connected to the fuel switchgear 68 is provided on the surface of the ceramic combustion plate 63b near the boundary on the downstream side of the fuel premixture.

As described above, according to the sixth embodiment, when the ignition device 67 is energized, sparks are continuously generated between the discharge electrode 65 and the power receiver 66, and at the same time, the ceramic combustion in the vicinity of the ignition device 67 is performed. In the vicinity of the boundary of the plate 63a, the premixed fuel mixture is retained and the inflow of the outside air is suppressed, so that the ignition can be easily realized and the fire transfer can be surely realized to the ceramic combustion plate 63b. Also, the ceramic burners 63a through 63
Whether or not the heat is transferred up to b can be confirmed as the thermoelectromotive force by the combustion detection means 69, and if the fire transfer is defective, the fuel supply / shutdown device 68 can cut off the fuel supply.

(Embodiment 7) Embodiment 7 of the combustion apparatus of the present invention will be described below.

As shown in FIG. 7, the burner case 74 accommodates two ceramic combustion plates 73a and 73b having a plurality of penetrating flame openings 72 in the opening of the burner case 71.
There is, and on the boundary surface of the ceramic burners 73a and 73b,
The groove 80 is provided from the upstream side to the downstream side of the fuel premixture as an easy ignition constituting means. Further, on the surface of the ceramic combustion plate 73a near the boundary on the downstream side of the fuel premixed gas, an ignition device 77 as an ignition means including a discharge electrode 75 and a metallic power receiver 76 spaced at a fixed interval is provided. Combustion detection means 79 including a thermocouple electrically connected to the fuel switchgear 78 is provided on the surface of the ceramic combustion board 73b near the boundary on the downstream side of the fuel premixture.

As described above, according to the seventh embodiment, when the ignition device 77 is energized, sparks are continuously generated between the discharge electrode 75 and the power receiver 76, and the flame outlet 72 of the burner main body 74.
Sparks are continuously formed in the vicinity of, and at the same time, the fuel premixture is discharged not only from the flame port 72 but also from the groove 80 as an easy ignition constituent means.
It is possible to increase the amount of fuel in the vicinity of the ignition means 77 and easily realize ignition while maintaining the strength in the vicinity of the boundary of, and to reliably realize the transfer of heat to the ceramic combustion board 73b. Also,
Whether or not the fire is transferred from the ceramic combustion board 73a to 73b can be confirmed as the thermal electromotive force by the combustion detection means 79. If the fire transfer is defective, the fuel supply / shutdown device 78 can shut off the fuel supply. it can.

[0050]

From the above description, the combustion device of the present invention has the following effects.

(1) An ignition means provided near the flame mouth of the burner body, a burner body and a fuel opening / closing device are provided, and the ignition means and the fuel opening / closing device as an easily igniting means are electrically connected to each other, and the ignition means is provided. During operation, the burner body is supplied with a larger amount of fuel than the maximum amount of fuel supplied during steady combustion, so that excess fuel can be supplied to the burner body only during ignition to facilitate ignition, and after ignition, Since the maximum amount of fuel is reduced to its original value, combustion failure does not occur.

(2) In the ignition means near the flame mouth of the burner body, an air flow resistor as an easily ignitable constituting means is provided at a position facing the flame mouth so that the fuel is premixed by collision with the air flow resistor. Air can be retained and the inflow of outside air can be suppressed, and easy ignition can be realized with a simple configuration.

(3) In the ignition means near the flame mouth of the burner body, an air flow resistor is provided as an easily ignitable constituent means at a position facing the flame mouth, and a plurality of ventilation holes are provided in the air flow resistor. The airflow resistor can be brought close to the flame opening to form the ignition position in the vicinity of the flame opening where the inflow of outside air is small.

(4) With the structure in which the flame diameter of the ceramic combustion plate near the ignition means is continuously increased from the upstream side to the downstream side of the fuel premixture as the easy ignition constituting means,
Since the flow velocity of the fuel premixture is reduced, it is possible to easily ignite without drawing in outside air and prevent flashback during combustion.

(5) The ignition means can be brought close to the ceramic burner by providing the concave portion on the surface of the ceramic burner near the ignition means on the downstream side of the fuel premixture as the easy ignition component. It is easy to ignite in the recess.

(6) Ignition means and combustion detection means, and a fuel switchgear electrically connected to the combustion detection means are provided, and the ignition means is provided on one ceramic combustion plate side near the boundary between the ceramic combustion plates, Combustion detection means is provided in the vicinity of another ceramic combustion board, and the thickness of the plate on the downstream side of the fuel premixture in the vicinity of the boundary between the ceramic combustion boards is thinned as an easy ignition constituent means to make the ignition means Ignition and fire transfer can be easily realized by approaching the ceramic combustion board, and fire transfer and fuel cutoff can be confirmed.

(7) An ignition means and a combustion detection means, and a fuel switchgear electrically connected to the combustion detection means are provided, and the ignition means is provided on one ceramic combustion plate side near the boundary between the ceramic combustion plates, Combustion detection means is provided in the vicinity of another ceramic combustion board, and a groove is provided on the boundary surface of each ceramic combustion board as an easily ignitable constituent means to easily maintain the mechanical strength at the boundary surface of the ceramic combustion board. Ignition and fire transfer can be realized, and fire transfer confirmation and fuel cutoff can be performed.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a main part of a combustion device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the combustion apparatus according to the second embodiment.

FIG. 3 is a perspective view of a main part of the combustion apparatus according to the third embodiment.

FIG. 4 is a sectional view showing the concept of a main part of the combustion apparatus according to the fourth embodiment.

FIG. 5 is a sectional view showing the concept of a main part of a combustion apparatus according to the fifth embodiment.

FIG. 6 is a sectional view showing the concept of the main parts of a combustion apparatus according to the sixth embodiment.

FIG. 7 is a sectional view showing the concept of the main parts of the combustion apparatus of the seventh embodiment.

FIG. 8 is a conceptual diagram of a main part of a conventional combustion device.

FIG. 9A is a perspective view showing a heater of an ignition device portion of another conventional combustion device. FIG. 9B is a configuration diagram of the ignition device portion of the combustion device.

[Explanation of symbols]

 2, 22, 32, 42, 52, 62, 72 Flame port 4, 24, 34, 44, 54, 64, 74 Burner body 5 Fuel passage 7, 68, 78 Fuel switchgear 9, 25, 35, 45, 55 , 65, 75 Discharge electrode 10, 26, 36, 46, 56, 66, 76 Power receiver 11, 27, 37, 47, 57, 67, 77 Ignition device 28, 38 Airflow resistor 39 Vent port 48 Ignition flame port 58 Recessed portion 69, 79 Combustion detection means 80 Groove M Thickness of plate near boundary

Claims (11)

[Claims] 1. A burner body having a flame opening, and an ignition means provided in the vicinity of the flame opening of the burner body and on the downstream side through which the fuel premixture flows. A combustion device having an easy ignition constituent means for forming an easily ignitable state. 2. The burner body according to claim 1, wherein the easily ignitable constituent means, when the ignition operation is performed by the igniting means, a fuel premixture having a higher concentration of mixed fuel than during steady combustion after ignition. Combustion device characterized in that it is a means for automatically circulating it to the flame mouth. 3. The combustion apparatus according to claim 2, wherein the easy ignition component comprises a fuel opening / closing device connected to the burner body by a fuel passage, and the ignition device is electrically connected to the fuel opening / closing device to ignite. A combustion apparatus, which is a means for supplying a larger amount of fuel to the burner body than the maximum amount of fuel supplied to the burner body during steady combustion after ignition during the ignition operation of the means. 4. The combustion device according to claim 1, wherein the easily ignitable component has a flow velocity of the fuel premixture at a flame port corresponding to an ignition position higher than a flow velocity of the fuel premixture flowing to another flame port portion. Combustion device as a means to slow down. 5. The combustion apparatus according to claim 4, wherein an airflow resistor is provided as a readily ignitable constituent means at a position facing the flame port of the ignition means. 6. The combustion device according to claim 5, wherein the airflow resistor is provided with a vent hole. 7. The combustion device according to claim 4, wherein the flame diameter of the combustion plate near the ignition means as the easy ignition constituting means is continuously increased from the upstream side to the downstream side of the fuel premixture. . 8. The combustion apparatus according to claim 4, wherein a recess is provided in the vicinity of the ignition means as the easy ignition constituting means and on a surface of the combustion plate on the downstream side of the fuel premixture. 9. A burner body having a plurality of combustion discs provided with flame openings, an ignition means, a combustion detection means, and a combustion detection means provided near the flame openings of the burner body and downstream of the fuel premixture. A fuel switching device electrically connected to the combustion plate, an ignition means is provided on one combustion plate side near the boundary between the combustion plates, and a combustion detection means is provided near the combustion plate different from the combustion plate provided with the ignition means. 5. The combustion apparatus according to claim 4, wherein the flame port arrangement portion on the surface on the downstream side of the fuel premixture near the boundary between the combustion plates is formed thin. 10. A burner body having a plurality of combustion discs provided with flame openings, an ignition means, a combustion detection means, and a combustion detection means provided in the vicinity of the flame openings of the burner body and on the downstream side of the fuel premixture. A fuel switching device electrically connected to the combustion plate, an ignition means is provided on one combustion plate side near the boundary between the combustion plates, and a combustion detection means is provided near the combustion plate different from the combustion plate provided with the ignition means. The combustion apparatus according to claim 4, wherein a groove extending from the upstream side to the downstream side of the fuel premixture is provided on the boundary surface between the respective combustion plates. 11. The combustion apparatus according to claim 1, wherein a spark is formed between the discharge electrode and the power receiver as the ignition means.