JP2585909B2 - Burner fixing plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved fixing plate for assembling and fixing a plurality of burners.

[0002]

2. Description of the Related Art Conventionally, a combustion section containing a gas burner housed in a water heater or a bath pot utilizing combustion by gas has been configured as shown in FIG. 5, for example. In the figure, a combustion unit 1 includes a plurality of burners 2a having a large number of flame ports on an upper surface, and a plurality of burners 2a arranged in parallel in an upright state, and a fixing plate 8 surrounding the burner group 2 from all sides. It has.

The fixed plate 8 includes two side plates 4 and 5 sandwiching the burner group 2 in the row direction, and a front plate 6 and a rear plate 7 fixed to the side plates 4 and 5 from front and rear, respectively. Consists of On the inner walls of the front plate 6 and the rear plate 7, a large number of shallow vertical grooves (not shown) for accommodating the end regions at both ends of each burner 2a constituting the burner group 2 are formed.
Thus, the burners 2a can be arranged in parallel while holding the burners 2a in an upright state. In such a combustion unit 1, a predetermined amount of heat is generated in the entire burner group 2 by supplying a combustion gas from a gas pipe (not shown) with each burner 2 a, for example, above the combustion unit 1. The hot water for hot water supply can be boiled via a heat exchanger (not shown) arranged.

[0004]

However, such a burner fixing plate 8 has the following problems due to its structure. FIG. 6 is a schematic sectional view of the burner fixing plate 8 cut along the lateral direction.
This is indicated schematically by a dashed line. As shown by the arrow from the gas supply port 2b of the burner 2a, when the combustion gas is fed, an appropriate amount of primary air is mixed into the gas from around the gas supply port 2b. The gas mixed with the primary air is guided to a large number of flame ports formed along the left and right directions in the figure of the upper surface of the burner 2a, and is jetted from each flame port at a uniform gas pressure. .

Here, when the gas ejected from the burner 2a is ignited by an ignition means (not shown) to perform combustion, an appropriate amount of secondary air (air supplied at the time of combustion) is supplied from around each of the flame openings of the burner 2a. ) Needs to be supplied.
The supply of the secondary air is performed, for example, as shown by a dashed line arrow in FIG.

More specifically, in FIG. 5, air entering the inside from the open lower surface of the fixing plate 8 rises through, for example, between the burners 2a and reaches the respective flame outlets. Used to completely burn the gas. However,
As shown in FIG. 6, the secondary air flows into the flame outlets near the left and right ends in the drawing of the burner 2 a also from the sides. For this reason, the secondary air is supplied more toward the end of the burner 2a, but tends to be insufficient at the flame outlet near the center. For this reason, at the left and right end portions of the burner 2a in FIG. In contrast, near the center, secondary air is scarce and the flame tends to extend upward long until the gas is completely burned.

[0007] Therefore, there is a problem that the long rising flame directly hits the heat exchanger disposed above the combustion section, and damages the heat exchanger or deposits carbon on the heat exchanger. In particular, in recent years, high-calorie water heaters and the like have been developed, and a large amount of gas must be burned. Therefore, if the amount of secondary air is insufficient, there is a risk of incomplete combustion, and the state of the flame is reduced as shown in FIG. As shown in (1), the burner 2a has an uneven combustion shape, and the combustion performance deteriorates.

An object of the present invention is to burn gas without causing unevenness over the entire burner group,
An object of the present invention is to provide a burner fixing plate capable of improving combustion characteristics in accordance with increasing calorie of a water heater or the like.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to assemble and fix a plurality of burners having a large number of flame ports on an upper surface thereof by arranging the burners in parallel in an upright state and surrounding them. In this burner fixing plate, the fixing plate includes front and rear plates surrounding the periphery of the burner group, and two side plates arranged on both side surfaces of the burner group. By extending to overhang the group, secondary air from below is removed.
This is achieved by a burner fixing plate provided with an extension plate each configured to guide to the center of the burner.

[0010] Preferably, the rear plate and both side plates are formed integrally.

[0011] More preferably, the extension plate is formed with a guide groove having a shape corresponding to the outer shape of each burner end so that front and rear ends of each burner can be respectively accommodated. As used herein, the term front plate or rear plate means that the side fixed to the gas inlet side of the burner to be housed in the fixed plate is the front plate, and the one located on the opposite side is the rear plate. Called.

[0012]

From the upper sides of the front plate and the rear plate of the fixed plate, there are provided extension plates extending upward from a group of burners surrounded by the fixed plate. For this reason, of the secondary air that passes through the inside of the fixed plate from below the fixed plate, for example, passes through between the burners, and goes upward, particularly the air that follows the path from the front plate or the rear plate is the upper side of the upper plate. Hits an extension plate that extends from Since each extension plate extends so as to overhang toward the burner group, the secondary air hitting the extension plate is guided to the flame outlet near the center of the burner group. Therefore, there is no shortage of secondary air near the center of the burner as in the related art.

Further, if the rear plate and both side plates of the fixing plate are formed integrally, the fixing plate can be assembled with the burner housed therein, and the number of assembling steps can be reduced.

Further, if a guide groove having a shape conforming to the outer shape of the burner end is formed in an extension plate extending from the front plate and the rear plate of the fixed plate, the extension plate extends toward the burner group. In combination with the formation, each burner can be fitted along a relatively long guide groove. For this reason, the work of accommodating and assembling a large number of burners in the fixing plate becomes very simple.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. The embodiments described below are preferred specific examples of the present invention, and therefore, various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. The embodiments are not limited to these embodiments unless otherwise specified.

1 to 3 show a burner fixing plate according to a preferred embodiment of the present invention. FIG. 1 is a schematic plan view, FIG. 2 is a transverse sectional view, and FIG. 3 is a schematic front view. . As shown in the figure, the fixing plate 10 includes a plurality of burners 20 having a large number of flame ports on an upper surface thereof, which are arranged in parallel in a standing state to form a group of burners 21. The burners are assembled and fixed by surrounding them. This is the same as the conventional burner fixing plate.

The fixed plate 10 includes front and rear plates 11 and 12 surrounding a burner group 21 composed of a large number of burners 20.
It comprises side plates 13 and 14 arranged on both side surfaces of the burner group. Plates 11 and 12 and side plate 1 before and after constituting fixed plate 10
Reference numerals 3 and 14 are thin metal plates made of heat-resistant material such as stainless steel. In particular, in this embodiment, the rear plate 11 and the side plates 13 and 14 are integrally formed so as to be substantially U-shaped in FIG. Thereby, as will be described later, the fixing plate 10 can be assembled more easily than before. In addition, the front plate 12
2 and 3, a plurality of openings 12a are formed in parallel to fit a gas inlet of a burner, which will be described later, as shown in FIGS. I have.

The burner 20 is made by folding a thin metal plate by pressing and overlapping. As shown in FIG. 2, the burner 20 is formed in a thin plate shape having a gas inlet 20b at one lower end.
The inside thereof is provided with a gas introduction passage 20c following the gas intake port 20b. The upper part of the burner 20 is inflated in a bag shape, and is supplied in a state where the gas and the primary air are mixed through the gas introduction path 20c. The upper surface 20a is formed slightly flat as shown in FIG.
On the upper surface 20a, a large number of cut-shaped flame ports 20d are formed.

Further, in this embodiment, the burner fixing plate 1
Extension plates 15 and 16 are integrally extended from the upper sides of the front plate 11 and the rear plate 21 so as to face each other toward the center. Each of the extension plates 15 and 16 is formed in a substantially comb-teeth shape, and guide grooves 15a and 16a are provided between the comb teeth as shown in FIG. As shown in FIG. 1, the guide grooves 15a and 16a have an elongated triangle shape along the shape of the end of each burner 20. Further, as shown in FIG. 4, each of the extension plates 15, 16 starts from the upper side of the front plate 11 and the rear plate 12, and extends downward from the burner group 21 toward the center of the burner group. It inclines slightly upward and extends to overhang.

The burner fixing plate 10 of this embodiment is constructed as described above, and its operation will now be described. Referring to FIG. 4, secondary air rises from below fixing plate 10 to burner 20 assembled inside burner fixing plate 10. This air is supplied, for example, to the vicinity of a large number of flame openings (not shown) formed on the upper surface of the burner 20 so as to pass between the burners 20. At this time, the secondary air rises inside the fixed plate 10 as shown by arrows, and hits extension plates 15 and 16 extending from the front plate 12 and the rear plate 11 near both ends of each burner 20. These extension plates 15, 16
Is slightly inclined and overhangs above the burner group 21, so that the secondary air is guided by this and goes to the vicinity of the center of the burner 20.

Accordingly, since the secondary air is sufficiently supplied without shortage at the flame opening formed near the center of the burner 20, the center of the flame is higher than other parts as shown in the figure. And a combustion state without unevenness as a whole. For this reason, for example, when used as a high calorie burner, even if a large amount of gas is introduced into each burner 20, the center of the flame rises high and damages the heat exchanger disposed above the combustion section. There is no feeding or sooting, and no incomplete combustion due to lack of secondary air.

By using the burner fixing plate 10, the burner can be efficiently burned as described above, and the following effects are also obtained.

The extension plates 15, 16 formed on the front plate 12 and the rear plate 11 of the fixed plate 10 are formed with guide grooves 15a, 16a having relatively deep cuts as shown in FIG. The end of the formed burner 20 is easily fitted. That is, conventionally, only a shallow groove is formed in the front plate and the rear plate, and the groove does not hold the burner even if the elongated end of the burner 20 is fitted into the groove. In comparison with this, the guide groove 15a1 of this embodiment
Since 6a is formed by using the extension plates 15 and 16, a deep groove is formed, and when the burners 20 are sequentially inserted, they can be held so as not to fall off. For this reason, the assembling work of the burner 20 can be performed extremely easily.

In addition, as shown in FIG. 5, in the conventional burner fixing plate, the front plate 6 and the rear plate 7 must be screwed to the side plates 4 and 4 at four places. Was. However, in the fixed plate 10 of this embodiment, the rear plate 11 and the both side plates 1
Since the members 3 and 14 are formed integrally, as described above, if the burners 20 are sequentially fitted and the front plate 12 is attached, the assembly of the fixed plate 10 is completed. Therefore, the number of assembling steps is significantly reduced. Also in this operation, since each burner 20 can be performed in a state where it is already held on the rear plate 11, the positioning of the gas intake port 20b of the burner 20 and the opening 12a of the front plate 12, which was conventionally difficult, is performed. Work can be done very easily.

By forming the extension plates 15 and 16, the secondary air may collect too much near the center of the burner. In such a case, for example, a means such as notching a portion of each comb-like root of each of the extension plates 15 and 16 shown in FIG. 1, that is, a deep portion of the guide grooves 15a and 16a. Can also be taken. In this way, the secondary air is also supplied to the vicinity of both ends of each burner from below the fixed plate 10, so that the secondary air can be supplied to the entire burner in a well-balanced manner, and the combustion characteristics can be improved. Can be improved.

[0026]

As described above, according to the present invention, it is possible to stably burn gas without causing unevenness over a large number of burners to be accommodated, and to increase the calorie of a water heater or the like. It is possible to provide a burner fixing plate that can improve the combustion characteristics accordingly.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a preferred embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the embodiment of FIG.

FIG. 3 is a schematic front view of the embodiment of FIG. 1;

FIG. 4 is a view showing a combustion state of a burner in the embodiment of FIG. 1;

FIG. 5 is a perspective view showing an example of a conventional burner fixing plate.

FIG. 6 is a diagram showing a combustion state of a burner when the fixing plate of FIG. 5 is used.

[Explanation of symbols]

 Reference Signs List 10 burner fixing plate 11 rear plate 12 front plate 13, 14 side plate 15, 16 extension plate 15a, 16a guide groove 20 burner 20a flame outlet

Claims (3)

(57) [Claims] 1. A burner fixing plate in which a plurality of burners having a large number of flame ports on an upper surface are arranged in parallel in an upright state, and are assembled and fixed by surrounding the periphery thereof. It consists of the front and rear plates surrounding the periphery and two side plates arranged on both sides of the burner group, and the upper sides of the front and rear plates extend so as to overhang above the burner group. By downward
To guide the secondary air from the burner to the center of the burner
A burner fixing plate, wherein each of the extended plates is provided. 2. The burner fixing plate according to claim 1, wherein the rear plate and both side plates are formed integrally. 3. The extension plate is formed with a guide groove having a shape corresponding to the outer shape of each burner end so as to accommodate front and rear ends of each burner. The burner fixing plate according to claim 1.