JPH05203122A - Concentration distributed burning equipment - Google Patents

Abstract

PURPOSE:To simplify the structure of a concentration distributed burning equipment by sharing a side wall of a dense mixing portion with that of a thin mixing portion. CONSTITUTION:When a dense mixing portion 2 is arranged at a fixed distance apart, the space sandwiched with a side wall 20 of the dense mixing portion 2 is produced between the dense mixing portion 2, thereby the space can be diverted to a thin mixing portion 3 as it is. In a word, the side wall of the thin mixing portion 3 can be omitted. Thus, the side wall 20 of the dense mixing portion and of the thin mixing portion can be shared by utilizing the space between the side walls of the dense mixing portion 2 next to the thin mixing portion 3. By contraries, the side wall 20 of the dense mixing portion 2 can be also omitted. Therefore, the structure of a concentration burning equipment can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light mixture section for light mixture and a thick mixture section for rich mixture, which are alternately arranged, and a flame for light mixture is provided on an upper surface of the light mixture section. The present invention relates to a rich-lean combustion device in which holes are formed and flame holes for rich mixture are formed on the upper surface of the rich mixing portion.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned rich-lean combustion apparatus firstly comprises a light burner comprising a light-mixing section and a flame hole for the light-air mixture, and a rich-mixing section and a flame hole for the rich-air mixture. The thick burner and the separate burner are individually formed, and the thick burner and the light burner are alternately arranged (see, for example, Japanese Patent Laid-Open No. 3-263501).

[0003]

In the above-mentioned prior art, since the rich burner and the light burner are individually formed by the separate constituent members, the structure of the rich and lean burner is complicated. An object of the present invention is to eliminate the above-mentioned conventional drawbacks and simplify the structure of the rich and lean combustion device.

[0004]

To achieve this object, the first characteristic structure of the rich / lean combustion apparatus according to the present invention is that the side wall of the rich mixing section and the side wall of the light mixing section are shared. Is.

The second characteristic constitution specifies a preferable concrete constitution for implementing the first characteristic constitution,
A dividing plate that divides and forms the flame holes is attached to the side wall.

[0006]

The operation of the first characteristic configuration is as follows. For example, when the rich mixing portions are arranged with a predetermined distance therebetween, a space sandwiched by the side walls of the rich mixing portions is formed between the facing rich mixing portions. It is possible to use the space as it is for the light mixing section. That is, in this case, the side wall of the light mixing portion can be omitted. Conversely, it is also possible to omit the side wall of the rich mixing section.

The operation of the second characteristic configuration is as follows. It is necessary to divide the flame holes into appropriate shapes and sizes by a dividing plate so that the jet speed of the air-fuel mixture can be maintained within an appropriate range. Here, in general, the dividing plate for the light mixture is attached to the side wall of the light mixing portion. However, when the side wall of the light mixing portion is omitted as described above, the dividing plate for the light mixture is also attached to the side wall of the rich mixing portion.

[0008]

According to the first characteristic configuration, since the partition wall of the light mixing portion or the rich mixing portion can be omitted, the structure of the rich / lean combustion device can be simplified.

In the second characteristic structure, even if the partition wall of the light mixing portion or the rich mixing portion is omitted, the flame hole for the light mixture or the flame hole for the rich mixture can be easily formed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a water heater will be described below with reference to the drawings. As shown in FIG. 5, a burner unit U of the dark and light combustion type is installed inside the outer case S, a heat exchanger K is provided on the upper part of the outer case S, and thus a water heater is configured. In the figure, G is a gas supply pipe for supplying fuel gas to the burner unit U, F is a fan for supplying combustion air to the burner unit U, and G1 and G2 are gas injection nozzles.

The burner unit U will be further described.
As shown in FIGS. 2 to 4, a bottomed rectangular tubular casing 1
The burner unit U is configured by alternately arranging the light mixing portions 3 for the light air-fuel mixture and the rich mixing portions 2 for the heavy air-fuel mixture therein. Here, although the rich mixing portions 2 are arranged at both ends of the burner unit U, the rich mixing portions 2 at both ends are arranged.
An air passage 6 for promoting combustion is formed between and the side plate 11 of the casing 1. Also, the bottom plate 15 of the casing 1
The fuel gas and the combustion air are mixed in the rich mixing part 2 and the light mixing part 3.
The opening 17 for supplying the liquid is formed in a notch. This opening 17 has a portion corresponding to the light mixing portion 3 in the deep mixing portion 2.
Is formed wider than the portion corresponding to. Further, an engaging body 16 that engages with a lower opening 22 of the later-described rich mixing portion 2 is projected upward from the end of the opening 17 of the portion corresponding to the rich mixing portion 2.

The rich mixing section 2 is arranged at a predetermined interval. The structure of each of the rich mixing portions 2 will be described. As shown in FIGS. 1 and 3, a pair of plate members 20 bent and formed in the same shape are faced to each other and bonded to each other so that the plate members 20 are bonded to each other. A cylindrical space is formed in which the upper opening 21 and the lower opening 22 communicate with each other. A flame hole plate 23 is attached to the upper opening 21. In the flame hole plate 23, a plurality of flame holes 24 for the rich air-fuel mixture are cut out in rows. That is, the fuel gas injected from the gas injection nozzle G1 to the lower opening 22 and the combustion air supplied through the lower opening 22 are mixed in the cylindrical space to generate a predetermined rich air-fuel mixture. It And the rich mixture is the flame hole 2
Eject from 4 and burn. That is, the cylindrical space forms the rich mixing portion 2, and the plate material 20 forms the side wall of the rich mixing portion 2.

The attachment of the rich mixing section 2 to the casing 1 will be described. As shown in FIG. 2, inward protrusions 14 are formed on the upper edges of the front plate 12 and the rear plate 13 of the casing 1, respectively.
Are provided so as to face each other at predetermined intervals. Thick mixing section 2
Both end portions of are to be inserted between the left and right protrusions 14. Further, as described above, the bottom plate 15 of the casing 1 is provided with the engaging body 16 that engages with the lower opening 22 of the rich mixing portion 2. Therefore, by inserting the rich mixing portion 2 from above the casing 1, the rich mixing portion 2 can be attached to the casing 1.

Next, the light mixing section 3 will be described. Figure 2
Further, as shown in FIG. 4, the light mixing portion 3 is formed by utilizing the space between the side walls 20 of the adjacent rich mixing portions 2.
That is, the side wall 20 of the rich mixing section 2 and the side wall 20 of the light mixing section 3
And are shared. Further, the flame hole 34 for the light air-fuel mixture is formed on the upper surface of the light air-mixing portion 3. As shown in FIG. 1, a dividing plate 25 for dividing and forming the flame holes 34 is attached to the upper portions of the outer surfaces of both side walls 20 of the rich mixing portion 2. That is, the flame holes 34 are divided into three rows in the longitudinal direction. That is, the fuel gas injected from the gas injection nozzle G2 and the combustion air are mixed in the light mixing portion 3 to generate a predetermined light air-fuel mixture. Then, the light mixture is the flame hole 3
Eject from 4 and burn.

[Other Embodiment] In the above embodiment, the rich mixing section 2 is used.
Although a dividing plate 25 was attached to both side walls 20 of the
The dividing plate 25 may be attached to only one side of 0. In the above-described embodiment, the dense mixing portion 2 is formed by adhering the pair of plate materials 20 facing each other, but as shown in FIG. 6, for example, one plate material 20 is bent into a rectangular tube shape and concentrated. The part 2 may be formed. Further, the specific configuration of each part such as changing the shape of the dividing plate 25 to a shape as shown in FIGS. 7 and 8 to promote the mixing of the fuel gas and the combustion air is as follows.
Various changes can be made.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a burner unit.

FIG. 2 is a partially cutaway plan view of a burner unit.

FIG. 3 is a view on arrow AA of FIG.

FIG. 4 is a view on arrow BB in FIG.

FIG. 5 is a schematic configuration diagram of a water heater.

FIG. 6 is a perspective view of a main part of another embodiment of the burner unit.

FIG. 7 is a perspective view of a main part of another embodiment of the burner unit.

FIG. 8 is a perspective view of a main part of another embodiment of the burner unit.

[Explanation of symbols]

 2 dense mixing part 3 light mixing part 20 side wall 24, 34 flame hole 25 dividing plate

Claims (2)

[Claims] 1. A light mixing portion (3) for a light air-fuel mixture and a rich mixing portion (2) for a dark air-fuel mixture are alternately arranged, and a light air-fuel mixture is provided on an upper surface of the light air-mixing portion (3). A flame hole (34) for the rich mixture is formed on the upper surface of the rich mixing portion (2).
4) is formed, wherein the side wall (20) of the rich mixing section (2) and the side wall (20) of the light mixing section (3) are shared. 2. The dividing plate (25) for dividing and forming the flame hole (34) is attached to the side wall (20).
The dark and light combustion device described.