TWI588415B - Flat burner - Google Patents

Description

Flat burner Field of invention

The present invention relates to a flat burner which is long in the front-rear direction having a flame mouth portion which discharges a mixture toward the upper end.

Background of the invention

Such a flat burner is configured such that a spark is generated between the upper end of the side plate portion on the outer side of the flame mouth portion and the ignition electrode, and the mixed gas discharged from the flame port portion is ignited. In addition, conventionally, a projection that protrudes upward as a target portion of the spark scattering is formed at a predetermined position at the upper end of the side plate portion (see, for example, Patent Documents 1 and 2).

However, such a protrusion is exposed to the flame when the burner is burned, so that the front end of the protrusion is rounded due to the sagging of the heat. Moreover, once the front end of the projection is deformed in this way, the spark becomes difficult to fly to the front end of the projection, resulting in deterioration of the ignition performance.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2011-127863 (Fig. 4)

Patent Document 2: Japanese Patent Laid-Open Publication No. 2013-122336 (Fig. 2, Fig. 2) 6, Figure 7)

Summary of invention

The present invention has been made in view of the above, and it is an object of the invention to provide a flat burner which can prevent deterioration of ignition performance as much as possible.

In order to solve the above problems, the present invention is a flat burner having a flame mouth portion that discharges a mixture gas toward the upper end, which is long in the front-rear direction, and is characterized in that a predetermined position of the upper end portion of the side plate portion on the outer side of the flame mouth portion and the ignition electrode In the above configuration, a spark that is ejected from the flame port portion is ignited, and in the above configuration, a notch that is recessed downward is formed at the predetermined position at the upper end of the side plate portion.

According to the present invention, the edge portion which is recessed downward at the beginning of both ends of the notch becomes a target portion, and the spark is caused to fly there. Further, the edge portion is different from the tip end of the projection which is the target portion as in the prior art, and is not easily deformed by heat, so that the ignition performance can be prevented from being deteriorated as much as possible.

Further, it is preferable that the flat burner has a configuration in which a burner body having one side plate facing each other in the lateral direction, and a burner having one side plate of the burner body covered by both sides in the lateral direction a cover, and a side plate on one side in the lateral direction of the burner cover constitutes a side plate portion on the outer side of the flame mouth portion, and when a predetermined position is formed at the side of the side plate, a side plate end on the other side in the lateral direction of the burner cover, The notch is formed in a point symmetrical manner with the aforementioned gap. Thereby, even if the burner is covered In the opposite direction, the burner cover is attached to the burner body in a state in which the side plate which should be disposed on the side in the lateral direction is disposed on the other side in the lateral direction, and the notch of the side plate disposed on the side in the lateral direction is also Located at a predetermined location to be used as a target. Therefore, it becomes possible to mount the burner cover without considering the direction thereof, and the mountability can be improved.

1‧‧‧burning basket

11‧‧‧ outer wall panels

2‧‧‧ combustion chamber

3‧‧‧Air supply room

31‧‧‧One air chamber

4‧‧‧Baffle

41‧‧‧Distribution hole

42‧‧‧Upright Board

43‧‧‧Upper Board

44‧‧‧ openings

5‧‧‧flat burner

51‧‧‧ burner body

51a‧‧‧The side plate of the burner body

51b‧‧‧Upper board

52‧‧‧burner cover

52a‧‧‧Side plate of the burner cover (side plate part)

52b‧‧ ‧Bridge

53‧‧‧ Flame Department

53a‧‧‧The main flame

53b‧‧‧ flame mouth

54‧‧‧Mixed Tube Department

54a‧‧‧flow entrance

55‧‧‧Main mixed gas path

56‧‧‧Fire-mixed gas path

56a‧‧‧Ventinel

57‧‧‧ gap

57a‧‧‧Edge

6‧‧‧ gas manifold

61‧‧‧Nozzles

7‧‧‧Flame sensor rod

8‧‧‧Ignition electrode

Fig. 1 is a perspective view of a combustion apparatus including a flat burner according to an embodiment of the present invention.

Figure 2 is a cutaway side view of the combustion apparatus of Figure 1.

Fig. 3 is a perspective view of the flat burner of the embodiment.

Figure 4 is a cross-sectional view of the flat burner taken along line IV-IV of Figure 3 .

Form for implementing the invention

Referring to Fig. 1 and Fig. 2, reference numeral 1 denotes a combustion basket which constitutes a combustion apparatus formed of a heat source unit for hot water supply. The upper surface of the combustion basket 1 is opened, and a hot water supply heat exchanger (not shown) as an object to be heated is placed on the combustion basket 1. The combustion basket 1 is provided with a partition 4 that partitions the space in the combustion basket 1 into the combustion chamber 2 and the air supply chamber 3 on the lower side thereof. In the combustion chamber 2, the flat burners 5 having the long sides in the front-rear direction are arranged with a gap in the lateral direction, and a plurality of them are arranged in parallel.

A combustion fan not shown in the drawing is connected to the bottom surface of the air supply chamber 3, and air is supplied to the air supply chamber 3 by the combustion fan. The partition plate 4 is formed with a plurality of distribution holes 41, and is formed such that air supplied to the air supply chamber 3 passes through the distribution holes. 41 is supplied to the combustion chamber 2 as secondary air.

Further, the front end of the partition plate 4 is provided with a rising plate portion 42 bent upward and an upper plate portion 43 which is bent forward by the upper end of the standing plate portion 42 and reaches the outer wall panel 11 on the front surface of the combustion basket 1. Further, the front end portion of the air supply chamber 3 is provided with a primary air chamber 31 that rises on the front side of the standing plate portion 42 to reach the upper plate portion 43. Each of the openings 44 of the inflow port 54a facing the upstream end of the mixing tube portion 54 described later of each of the flat burners 5 is formed in the standing plate portion 42, and the front side of the primary air chamber 31 is a gas manifold. 6 closed. The gas manifold 6 is provided with nozzles 61 facing the respective openings 44, and the fuel gas is supplied from the respective nozzles 61 to the respective openings 44 (that is, the mixing tube portions 54 of the flat burners 5), and the primary air chamber 31 is provided. Supply air once. Further, a flame rod 7 and an ignition electrode 8 are disposed on the front surface of the combustion basket 1.

Referring to FIGS. 3 and 4, the flat burner 5 is provided with a burner body 51 having a pair of side plates 51a, 51a facing each other in the lateral direction, and one of the burner bodies 51 having the outer sides on both sides in the lateral direction. Burner cover 52 for the side plates 52a, 52a. Further, the flat burner 5 has a flame port portion 53 that discharges the mixed gas at the upper end. The flame port portion 53 is provided with a plurality of main flame ports 53a formed on the upper plate 51b of the upper plates 51a and 51a of the burner body 51, and a plurality of main flame ports 53a are formed on the upper plate 51b, and the side plates 51a of the burner body 51 are provided. A flame-extinguishing port 53b is defined between each side plate 52a of the burner cover 52.

Further, the burner body 51 is provided with a mixing pipe portion 54 that extends rearward from the front end inlet 54a, and a main mixed gas passage 55 that is widened in the front-rear direction by the rear end portion of the mixing pipe portion 54 and extends upward. , and The mixture of the fuel gas and the primary air flowing in from the inflow port 54a is guided to the main flame port 53a through the mixing pipe portion 54 and the main mixed gas passage 55. Further, the side plates 51a, 51a and the upper plate 51b of the burner body 51 are formed by bending one plate.

A pilot mixture passage 56 connected to the flame introducing port 53b is provided between each side plate 51a of the burner body 51 and each side plate 52a of the burner cover 52. Further, a plurality of vent holes 56a are formed in the side plates 51a of the burner body 51 at intervals in the front-rear direction, and the vent holes 56a are located at a portion overlapping the lower portion of the side plate 52a of the burner cover 52. Further above, the main mixed gas passage 55 and the pilot mixed gas passage 56 are connected. Further, the mixed gas which is branched by the main mixed gas passage 55 and transmitted through the vent holes 56a is supplied to the flame introducing port 53b through the pilot mixture passage 56, and is formed to be formed by the igniting formed on the flame introducing port 53b. The main flame on the main flame port 53a. Further, the burner cover 52 has a bridge portion 52b that connects the upper ends of the side plates 52a, 52a at a plurality of positions in front and rear.

However, at the time of ignition, it is placed in front of the upper end portion of the side plate portion on the outer side of the flame mouth portion 53 of the flat burner 5 disposed directly below the ignition electrode 8 (i.e., the side plate 52a on the left side in Fig. 3 of the burner cover 52). A spark is generated between the predetermined position and the ignition electrode 8, and the mixed gas discharged from the flame port portion 53 is ignited. Further, in order to be surely ignited, it is preferable that the target portion at the time of the spark flying is provided at a predetermined position in the front portion of the upper end portion of the left side plate 52a. However, if the target portion is formed by the protrusion protruding upward, the following occurs. Bad condition. That is, since the projection is exposed to the flame when the burner is burned, there is a case where the tip end of the projection hangs down and becomes rounded. Moreover, once suddenly When the front end is deformed in this way, the spark becomes difficult to fly to the front end of the protrusion, resulting in deterioration of the ignition performance.

Therefore, in the present embodiment, a notch 57 of a semicircular shape #1 recessed downward is formed at a predetermined position at the front end of the upper end of the side plate 52a on the left side of the burner cover 52, and both ends of the notch 57 are formed. The edge portion 57a which is formed in an angular shape which is recessed downward is a target portion. Here, since the edge portion 57a is different from the front end of the above-mentioned protrusion and is not easily deformed by heat, it is possible to prevent the deterioration of the ignition performance as much as possible.

Further, in the present embodiment, the notch 57 of #2 is formed in a rear portion of the upper end plate 52a on the right side of the burner cover 52 so as to be point-symmetric with the notch 57 of #1. In this way, even if the direction of the burner cover 52 is reversed, the burner cover 52 is attached to the burner body 51 in a state where the side plate 52a which should be disposed on the left side is disposed on the right side, and is disposed on the left side plate 52a. The notch 57 of the upper end #2 is also located at a predetermined position to be the target portion. Therefore, it becomes possible to mount the burner cover 52 without considering the direction thereof, thereby improving the mountability.

Further, in the present embodiment, since the ignition electrode 8 is disposed on the right side of the flat burner 5, a notch 57 of #3 may be formed in the front portion of the upper end of the side plate 52a on the right side of the burner cover 52, Further, a notch 57 of #4 is formed in a rear portion of the upper end plate 52a on the left side of the burner cover 52 so as to be point-symmetric with the notch 57 of #3. Further, the notches 57 of #1 to #4 described above may be formed on all of the flat burners 5 so as to form which flat burner 5 is disposed directly under the ignition electrode 8.

Hereinabove, the embodiment of the present invention has been described with reference to the drawings, but The present invention is not limited to this. For example, the flat burner 5 can also be constructed without the burner cover 52. In this case, a notch is formed at a predetermined position on the side plate end of the burner body which is the side plate portion on the outer side of the flame mouth portion. Further, in the above-described embodiment, the notch 57 is formed in a semicircular shape, but the shape of the notch 57 may have a shape other than a semicircular shape such as a V shape as long as it has an edge portion having an angular shape on at least one end. However, in view of the durability of the punch for press forming the notch 57, it is preferable that the shape of the notch 57 is a semicircular shape in which the defective portion is not easily formed on the punch.

5‧‧‧flat burner

51‧‧‧ burner body

51a‧‧‧The side plate of the burner body

51b‧‧‧Upper board

52‧‧‧burner cover

52a‧‧‧Side plate of the burner cover (side plate part)

52b‧‧ ‧Bridge

53‧‧‧ Flame Department

53a‧‧‧The main flame

53b‧‧‧ flame mouth

54‧‧‧Mixed Tube Department

54a‧‧‧flow entrance

55‧‧‧Main mixed gas path

57‧‧‧ gap

57a‧‧‧Edge

8‧‧‧Ignition electrode

Claims (2)

A flat burner is a flat burner having a flame mouth portion that discharges a mixture toward the upper end in the front-rear direction, and is characterized in that a spark is generated between a predetermined position of the upper end portion of the side plate portion on the outer side of the flame mouth portion and the ignition electrode. The gas mixture discharged from the flame port portion is ignited, and the predetermined position is disposed immediately below the ignition electrode. In the above configuration, the predetermined position at the upper end of the side plate portion forms a notch that is recessed downward. A flat burner according to claim 1, comprising: a burner body having a pair of side plates facing each other in a lateral direction; and a burner cover having one side plate of the burner body covered by both sides in the lateral direction, and The side plate on one side in the lateral direction of the burner cover constitutes the side plate portion, and the notch is formed at a predetermined position of the side plate end, and in the above configuration, the side plate end on the other side in the lateral direction of the burner cover, and the aforementioned gap Become a point symmetrical form to form a gap.