JPH0560312A - Gas burner - Google Patents

Abstract

PURPOSE:To avoid such trouble as incomplete combustion due to clogging of burner ports by preventing falling matters such as combustion oxides, dust, etc., from entering the burner port. CONSTITUTION:One of upward burner ports 1 facing each other is covered with a combustion plate 2 leading to the burner ports 1 to prevent falling matters such as combustion oxides dust, etc., from directly entering the burner port 1. As the falling matters are accommodated in a pocket 3 that is located between and below the burner ports 1, the falling matters that pile up are kept from entering the burner ports 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas burner in which a plurality of burner units are arranged side by side at regular intervals and used as a forced combustion gas burner for a water heater, a stove and the like.

[0002]

2. Description of the Related Art In a gas burner, if the flame mouth is clogged, the following harmful effects occur.

Since the pressure resistance of the burner increases, the primary air ratio falls below the design set value. Therefore, abnormal combustion noise is generated, CO is generated due to incomplete combustion, flashback, lift combustion, and the like.

When the state of clogging of the flame continues for a long time, the high temperature heating parts such as the combustion chamber and the heat exchanger are abnormally overheated to cause cracks, perforations and the like, and high temperature exhaust gas is generated from the cracks and perforations. It may leak and burn the outer casing, causing a fire, and the deterioration and destruction of the burner due to flashback is significant.

The above-mentioned problems may lead to serious failure of appliances such as a water heater and a stove, so that prevention of clogging at the flame mouth is indispensable for always safely burning the gas burner.

However, a conventional gas burner of this type is shown, for example, in Japanese Patent Publication No. 2-13201, and as shown in FIG. , 5 ', the combustion surface forming walls 3', 4'inclining in a divergent manner are provided symmetrically extending upward, and a flame is formed along the combustion surface forming walls 3 ', 4'. The formed structure enables an increase in turndown ratio, combustion under high load, and reduction in combustion noise.

[0007]

In the above-mentioned prior art, the combustion surface forming wall 3 ', which is inclined toward the end,
Since 4'is symmetrically extended upward, the flame outlet 5 ',
The upper part of 5'is wide open.

Therefore, the gas burner is, for example,
When it is used as a burner for a water heater, falling substances such as combustion oxides (scale) or dust generated in a heat exchanger or the like directly enter the burner flame ports 5 and 5, causing clogging at the early stage.

Further, even if a fallen object does not enter the flame mouth but falls around it, if it accumulates near the periphery of the flame mouth,
There was a problem that, due to the vibration of the equipment, the increase of deposits, etc., most of it finally entered the flame mouth, causing clogging of the flame mouth.

In view of the above problems of the prior art, the present invention covers the flame port with the combustion plate itself to form a combustion oxide,
While preventing falling objects such as dust from directly entering the flame outlet,
By accumulating fallen objects in the reservoir provided below the flame openings, it is possible to prevent the accumulated fallen objects from entering the flame openings, and to provide a gas burner that eliminates clogging of the flame openings due to falling objects. There is.

[0011]

In order to achieve the above object, the gas burner of the present invention has combustion plate members connected to opposing upwardly facing flame outlets extending obliquely upward and extending along the combustion plate members. In a gas burner in which a flame is formed, at least one of the combustion plate members is provided so as to be inclined at an angle so as to cover the flame opening.

Further, the present invention is characterized in that a collecting portion for accommodating fallen objects such as combustion oxides and dust is provided at a lower portion between opposed upward flame openings.

[0013]

Since the gas burner of the present invention is constructed as described above, one or both of the opposing upward flame openings are completely covered by the combustion plate body on the flame opening side, so that combustion oxides, dust, etc. The fallen object does not directly enter the flame mouth and cause the clogging of the flame mouth.

Further, since falling substances such as combustion oxides and dust from above are accommodated in the accumulation part in the lower part between the flame openings, even if the falling objects are accumulated in the accumulation parts, Since it is located at a low position, the deposit does not enter the flame mouth and cause clogging of the flame mouth.

[0015]

Embodiments of the gas burner according to the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an embodiment in which only one of the opposing upward flame outlets is covered with the combustion plate body on the flame outlet side, where A is the burner body and the burner throat portion. Four
And a mixing portion 5, and upwardly facing flame ports 1 and 1 facing each other at the tip of the mixing portion 5 are opened obliquely upward in the same direction.

Reference numerals 2 and 2 denote combustion plate members connected to the upward flame openings 1 and 1, respectively, and extend upward in a divergent shape inclined to one side at an angle substantially the same as the opening direction of the flame openings 1 and 1. There is.

The upward flame outlets 1 and 1 and the combustion plate members 2 and 2 facing each other are inclined in the same direction at different angles, and the combustion plate members 2 and 2 are inclined in the same direction to form a divergent shape. In addition, one combustion plate 2 is tilted inward from the vertical line C of the flame opening 1, and the combustion plate 2 is tilted at an angle so as to cover the flame opening 1 so that one flame opening 1 is located on the flame opening side. It is covered with the combustion plate body 2 (see FIG. 2).

In the combustion plate bodies 2 and 2, ventilation holes 6 and 6 made of slit holes with burring and having a height h equal to or more than the thickness e of the flame openings 1 and 1 are formed, and The flow of the secondary combustion air b, b from the air holes 6, 6 is
Combustion flame a, a as a structure that does not collide with the mixed gas from 1
The secondary air b and b are smoothly contacted with each other to achieve low noise and stable combustion without lift and incomplete combustion.

Reference numeral 3 designates a reservoir portion for accommodating fallen objects such as combustion oxides and dust, which is a lower portion between the opposing upward flame ports 1 and 1,
That is, it is provided so that the fallen object is accommodated at a position lower than the flame outlets 1, 1.

FIG. 3 illustrates a case where a plurality of the gas burners of the present invention described above are arranged in parallel in the combustion chamber 7 and used as a forced combustion gas burner such as a water heater and a stove. The mixing section 5 of the burner body A is illustrated. When the mixture of the fuel gas and the primary air for combustion ejected from the flame openings 1 and 1 and burns, the combustion flames a and a tend to extend upward along the oblique combustion plate bodies 2 and 2. It is formed in a laminar flame.

In the above-described embodiment, one of the opposing flame openings 1 and 1 opened obliquely upward in the same direction extends upward while being inclined at substantially the same angle as the opening direction of the flame opening 1. Since it is covered with the combustion plate body 2 on the flame port side, even if combustion oxides or dust from the heat exchanger or the like falls on the burner, at least one flame port 1 is free from falling objects. There is no direct entry.

Further, since the accumulation portion 3 for accommodating the falling object is provided in the lower portion between the opposing flame ports 1 and 1, even if the falling object is accommodated and accumulated in the accumulating portion 3, it accumulates. Since the part 3 is located at a position lower than the flame nozzles 1, 1, deposits never enter the flame nozzles 1, 1.

FIG. 4 shows an embodiment in which both of the upward flame ports facing each other are covered with respective combustion plates, and the combustion is continued to the upward flame ports 1, 1 which are opened inward. By extending the plate bodies 2 and 2 upwardly at a substantially same angle as the opening direction of the flame ports 1 and 1 in a tapered shape,
Both flame ports 1 and 1 are covered with respective combustion plate bodies 2 and 2.

In this embodiment, both flame tips 1, 1
Since both are covered with the combustion plate bodies 2 and 2, even if combustion oxides or dust from a heat exchanger etc. fall on the burner, the flame vents 1 and 1
Falling objects do not enter directly into any of these.

Since the structure and operation are the same as those of the previous embodiment except for the above-described structure and operation, the same parts are designated by the same reference numerals and the description thereof is omitted. In the figure, 8 is a spacer for positioning with an adjacent gas burner.

[0027]

According to the gas burner of the present invention, in the gas burner in which the combustion plate members connected to the opposing upward flame outlets extend obliquely upward, and flame is formed along the combustion plate members, Since one or both of the body is installed so as to be inclined at an angle that covers the flame outlet, burned oxides such as heat exchangers or dust falling on the burner will not directly enter the flame outlet. Clogging is effectively prevented, and the burner can always burn safely.

Further, since the trap portion for accommodating the falling objects such as combustion oxides and dust is provided in the lower portion between the facing upward flame outlets, the burner for combustion oxides or dust from the heat exchanger or the like is provided. Fallen objects are stored in the pool.

Since the reservoir is located lower than the flame mouth,
Even if the fallen material accumulates in the pool, the deposit does not enter the flame opening and the deposit does not clog the flame opening, so that safe combustion can always be performed.

From the above, all the harmful effects such as generation of abnormal combustion noise due to clogging of the flame mouth, generation of CO due to incomplete combustion, deterioration of burner due to flashback, destruction or induction of fire are eliminated. It has a great effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a gas burner according to the present invention.

FIG. 2 is a vertical sectional side view thereof.

FIG. 3 is a vertical sectional side view showing an example of a usage state of the gas burner according to the present invention.

FIG. 4 is a vertical sectional side view showing another embodiment of the gas burner according to the present invention.

FIG. 5 is a schematic sectional view of a main part of a conventional example.

[Explanation of symbols]

 1 Upward flame mouth 2 Combustion plate 3 Reservoir a Flame

Claims (2)

[Claims] 1. In a gas burner in which combustion plate members connected to opposed upward flame outlets extend obliquely upward and flame is formed along the combustion plate members, at least one of the combustion plate members is flamed. A gas burner characterized by being inclined at an angle covering the mouth. 2. The gas burner according to claim 1, wherein a reservoir portion for accommodating falling objects such as combustion oxides and dust is provided in a lower portion between opposed upward flame openings.