JPH0933011A - Burner and burner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate deterioration in combustion at a burner caused by clogging of a uniform pressure plate by dust. SOLUTION: A plurality of burners 31 are collected and arranged to form a burner device 21. Each of the burners 31 is formed with a burner main body 12 having a pre-mixing passage 15 for use in mixing fuel gas and air therein and an outlet port of the pre-mixing passage 15 is provided with flame ports 16 for use in injecting pre-mixed gas containing fuel gas and air and igniting it. Air supplying passage forming plates 23 are arranged to hold the burner main body 12 at its both sides, an air supplying passage 25 for supplying combustion assisting air is formed between each of the plates 23 and the burner main body 12 and further an outlet port of the air supplying passage 25 is formed with air injection ports 24 for injecting combustion assisting air at both sides of pre-mixed gas injected from the flame ports 16. Arrangement of the air supplying passages 25 causes air flowing from a fan of a combustion device to be distributed under a uniform pressure and fed to the flame ports 16, resulting in that the combustion assisting air is injected to both sides of the pre-mixed gas and efficiently supplied to perform a burner combustion.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a burner and a burner unit used in a combustion device such as a water heater.

[0002]

2. Description of the Related Art FIG. 10 shows an example of a burner unit used in a combustion apparatus such as a conventional water heater as assembled in the combustion apparatus. In the figure, the burner unit 21
Are a plurality of burners 11 arranged in a direction orthogonal to the paper surface of FIG. 10 with a gap therebetween, a burner frame 9 that collectively holds the plurality of burners 11, and a side plate of the burner frame 9.
The pressure equalizing plate 10 is connected to the lower end side of 20 by spot welding, screwing or the like, and the combustion fan 1 is provided on the lower side of the burner unit 21.

As shown in FIGS. 10 and 11, each burner 11
The gas nozzles 8 are disposed opposite to each other on the gas introduction port 13 side of each of the burners 11, and each burner 11 mixes the fuel gas ejected from the gas nozzles 8 and the air supplied from the combustion fan 1 with each other. Consists of 15.
On the outlet side of the premixing passage 15, there are provided a plurality of flame openings 16 for ejecting and burning the premixed gas in which the fuel gas and the air are mixed in the premixing passage 15.
16 is formed on the flame mouth forming surface 18.

The pressure equalizing plate 10 is formed, for example, as shown in FIG. 12, by appropriately punching holes 14 in a plate-shaped plate 22. The pressure equalizing plate 10 is a lower surface of a burner assembly. And serves to evenly distribute the air supplied from the combustion fan 1 to the gaps between the burners 11. The pressure equalizing plate 10 as shown in FIG. 12 is called, for example, punching metal.

When operating a combustion apparatus having this type of burner unit 21, the combustion fan 1 is driven to supply air to the burner 11 side, while the gas nozzle 8 is directed toward the gas inlet 13 side of the burner 11. When the fuel gas is ejected, the air from the combustion fan 1 is sucked into the premixing passage 15 of the burner 11 together with the fuel gas by the ejection of the fuel gas. Then, the fuel gas and the air are mixed in the premix passage 15, and the mixed premix gas is ejected from the flame port 16. The air from the combustion fan 1 is rectified through the holes 14 of the pressure equalizing plate 10 and supplied into the combustion chamber 3, and as shown in FIG. The remaining air is supplied as air for combustion assistance from the gap between the burners 11, and forced combustion is performed in the combustion chamber 3 by the air for combustion assistance and the premixed gas.

By this combustion, the water introduced from the water supply pipe 6 of the combustion device to the heat exchanger 2 is heated to become hot water, and the hot water is discharged at a desired hot water supply place via the hot water discharge pipe 7.

[0007]

However, in the burner unit 21 provided with the pressure equalizing plate 10 as described above,
For example, if the holes 14 of the pressure equalizing plate 10 are clogged with dust or oil, the pressure equalizing plate 10
It becomes impossible to supply the air from the combustion fan 1 to the combustion chamber 3 side via the air conditioner, which deteriorates the burner combustion of the combustion device and shortens the life of the device. It was

Further, although the combustion-assisting air supplied to the burner 11 from the gap side of the burner 11 should originally be ejected to both sides of the premixed gas ejected from the flame port 16, as described above. In the combustion apparatus having the burner unit 21, the air from the combustion fan 1 passes through the pressure equalizing plate 10 and the burner.
Because it will be ejected from every gap between 11,
Air supply for combustion assistance was not performed efficiently.

The present invention has been made in order to solve the above-mentioned conventional problems, and its purpose is to equalize pressure even without a pressure equalizing plate, without being adversely affected by dust clogging of the pressure equalizing plate. An object of the present invention is to provide a burner and a burner unit that can efficiently supply air for combustion assistance.

[0010]

Means for Solving the Problems To achieve the above object, the present invention provides means for solving the problems by the following constitution. That is, the burner of the present invention has a burner main body part having therein a premixing passage for mixing the fuel gas and the air therein, and the fuel gas and the air are provided in the premixing passage at the outlet side of the premixing passage. Is provided with a flame port for ejecting and combusting a premixed gas mixed with each other, and an air supply passage forming plate is provided so as to sandwich the burner main body from both sides, and the air supply passage forming plate and the burner are provided. An air supply passage for combustion auxiliary air is formed between the main body portion and an air ejection port for ejecting combustion auxiliary air is formed on both sides of the premixed gas ejected from the flame port on the outlet side of the air supply passage. It is configured to do what you did.

Further, a part of the premixed gas is distributed and introduced from the premixing passage as a sleeve-fire forming gas between the burner main body portion and the air supply passage, and the premixing gas is ejected from the flame outlet of the burner main body portion. It is also a characteristic configuration of the burner of the present invention that sleeve fire forming passages for ejecting sleeve fire forming gas are provided on both sides of the gas so as to sandwich the burner body from both sides.

Further, the burner unit according to the present invention is characterized in that a plurality of burners having the above-mentioned configuration are arranged in an array.

In the present invention having the above structure, the burner includes:
An air supply passage for combustion auxiliary air is formed in such a manner that the burner main body portion provided with a flame outlet for premixed gas ejection is sandwiched from both sides, and the flame outlet is provided on the outlet side of this air supply passage. Since an air outlet for ejecting combustion-assisting air is formed on both sides of the premixed gas ejected from the burner, when the burner and the burner unit equipped with the burner are incorporated into the combustor, the combustion fan of the combustor is installed. The combustion-assisting air supplied from the air is equalized and distributed, passes through the air supply passage, and is ejected from the air ejection port to both sides of the premixed gas.
Therefore, even if the combustion device is not provided with a pressure equalizing plate or the like for equalizing and distributing the air for combustion assistance, the air for combustion assistance is evenly and efficiently supplied to the burner near the flame outlet.
Good burner combustion is achieved, and the above problems are solved.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In the description of this embodiment, the same parts as those in the conventional example are designated by the same reference numerals, and the duplicate description thereof will be omitted. FIG. 1 shows a main part configuration of a first embodiment of a burner unit according to the present invention together with a gas nozzle 8, and FIG. 2 shows a plan view thereof. As shown in these drawings, the burner unit 21 of the present embodiment example is formed by arranging a plurality of the specific burners 31 of the present embodiment example with an interval therebetween, and, if necessary, the burner 31. An appropriate burner frame (not shown) for holding is provided. The burner unit 21 of the present embodiment example is not provided with the pressure equalizing plate 10 provided in the conventional burner unit 21.

Each of the burners 31 peculiar to the present embodiment has therein a premixing passage 15 and a flame port, like the burner 11 of the conventional example.
A burner body 12 having a burner body 16 and a flame face 18 is formed, and an air supply passage forming plate 23 is provided so as to sandwich the burner body 12 from both sides. An air supply passage 25 for combustion auxiliary air is formed between the air supply passage forming plate 23 and the burner body 12.
On the outlet side of 25, air ejection ports 24 for supplying combustion-assisting air are formed on both sides of the premixed gas ejected from the flame holes 16 of the burner body 12. In the present embodiment example, the air ejection port 24 is formed in a trapezoidal shape, the bottom side of which is formed to face the burner body 12 side.
By doing so, the combustion assisting air can be jetted to the vicinity of the flame port 16 very efficiently.

The example of the present embodiment is configured as described above, and when the burner unit 21 of the example of the present embodiment is incorporated into a combustion device as shown in FIG.
Although the air from the combustion fan 1 is supplied to the burner unit 21 side, the burner unit 21 of the present embodiment example omits the pressure equalizing plate 10 provided in the conventional example. It is supplied to the burner 31 side without intervention.

Then, similar to the operation of the burner 11 in the conventional example, the air introduced into the burner body 12 from the gas introduction port 13 side by the ejection of the fuel gas from the gas nozzle 8 flows into the fuel gas in the premixing passage 15. While being mixed with and ejected from the flame port 16, the combustion-assisting air is introduced into each air supply passage 25 from the air introduction port 33 to be pressure-equalized and passed through the air supply passage 25. Eject from the air outlet 24. Then, the combustion assisting air will be ejected to both sides of the premixed gas ejected from the flame port 16, and the burner combustion will be performed very efficiently by the combustion assisting air and the premixed gas. .

According to the present embodiment, as described above, in order to supply the combustion assisting air for assisting the combustion of the premixed gas ejected from the burner main body 12 through the air supply passage 25, the combustion assisting air is used. The air can be pressure-equalized and the pressure equalizing plate 10 which is indispensable in the conventional example can be omitted. Therefore, as in the conventional example, it is possible to solve the problem of adverse effects on burner combustion due to clogging of the pressure equalizing plate 10 and the like, and the life of the burner unit and the combustion device can be extended. Also, the height of the burner unit 21 can be reduced by the amount by which the pressure equalizing plate 10 can be omitted.
The burner unit 21 and the combustion device including the burner unit 21 can be simplified and the cost can be reduced.

Further, in this embodiment, since the combustion assisting air is ejected from the air ejection port 24 through the air supply passage 25 to both sides of the premixed gas by the above operation, the combustion assisting air can be reliably discharged. In addition, it is possible to efficiently supply the air, and unlike the case of supplying the air for combustion assistance from every gap between the burners as in the conventional example, waste of the supplied air can be omitted.

FIG. 4 shows the essential structure of a second embodiment of the burner unit according to the present invention, and FIG. 5 is a plan view thereof. Similar to the first embodiment, the present embodiment is also formed by arranging a plurality of burners 31 peculiar to the present embodiment in a collective array. FIG. 6 is a cross-sectional view of the burner 31. It is shown. As shown in these figures, the characteristic of the present embodiment example different from the first embodiment example is that a part of the premixed gas is present between the burner body 12 and the air supply passage 25. Is introduced from the premixing passage 15 as the sleeve fire forming gas through the side holes 29, and the sleeve fire forming gas is jetted to both sides of the premixed gas jetted from the flame port 16 of the burner body 12. The formation passage 26 is provided. This sleeve fire formation passage 26 is provided in the burner body.
It is provided so that 12 is sandwiched from both sides.
On the outlet side of the sleeve 26, a sleeve fire flame port 28 for ejecting sleeve fire forming gas is formed.

In this embodiment, the sleeve flame opening 28 has a trapezoidal shape, and the air ejection port 24 has a sleeve opening flame opening 28.
It is shaped like a boat that covers the air outlet 24
By forming in this way, the combustion assisting air can be efficiently supplied to the premixed gas ejected from the flame port 16 and the premixed gas as the sleeve fire forming gas ejected from the sleeve flame port 28. Is configured. Further, in the present embodiment example, as shown in FIG. 4, the air introduction port 33 of the air supply passage 25.
And the gas introduction port 13 of the premixing passage 15 are both formed on the bottom side of the burner 31.

The present embodiment is configured as described above. In the present embodiment, since the sleeve fire forming passage 26 is provided so that the burner body 12 is sandwiched from both sides, the burner body is provided. Part of the premixed gas that has passed through the 12 premixing passages 15 is distributed and introduced into the sleeve fire forming passage 26 through the side holes 29, and the sleeves are provided on both sides of the premixed gas ejected from the flame port 16 of the burner body 12. Fire-forming gas is ejected, and as shown in FIGS.
Sleeve flames are formed on both sides of the main flame generated by the combustion of the premixed gas that is ejected from the sleeve flame due to the combustion of the sleeve-fire forming gas that is ejected from the sleeve flame outlet 28.

In burning the premixed gas from the flame port 16 and the sleeve-fire forming gas from the sleeve flame port 28, in the present embodiment example, the burner main body is similar to the first embodiment example described above.
Since the air supply passage 25 for the combustion assisting air is formed in such a manner as to sandwich 12 between them, the combustion assisting air is supplied through this air supply passage 25, and this air is supplied from the air ejection port 24 to the above-mentioned preliminary Burner combustion is performed by the combustion-assisting air and the premixed gas in order to eject to both sides of the mixed gas,
The same effect as that of the first embodiment can be obtained.

Further, according to the present embodiment, the sleeve fire forming passage 26 is provided so as to sandwich the burner main body 12, and the ejection speed is smaller than the ejection speed of the premixed gas ejected from the flame nozzle 16. The gas for forming sleeve fire has a flame outlet for sleeve fire.
For example, when the burner combustion of the burner 11 is performed with the maximum combustion capacity, the ejection speed of the premixed gas from the flame nozzle 16 is the combustion speed of the premixed gas (the ejection direction of the premixed gas). Contrary to this, from the flame port 16 to the premixing passage 15
It is possible to prevent the lift of the main flame (the phenomenon of floating above the flame nozzle 16) due to the combustion of the premixed gas, even if it is much greater than the speed of the force acting in the direction returning to the side). It will be possible.

The present invention is not limited to the above-mentioned embodiments, but can take various modes. For example,
In the above-described embodiment, the burner unit 21 has a plurality of burners 31 arranged in a collective array with a space between them, but the burners 31 are not necessarily arranged with a space in between, and the burners 31 are arranged in a collective array without spaces. Alternatively, the burner unit 21 may be formed.

In the above embodiment, four burners are used.
The burner unit 21 was formed by arranging 31 in a collective arrangement.
The number of burners 31 forming the burner unit 21 is not particularly limited and may be set appropriately.

Further, in the first embodiment, the gas introduction port 13 of the premix passage 15 is formed on the side surface side of the burner 31,
The air introduction port 33 of the air supply passage 25 is formed on the bottom side of the burner 31, while the premix passage 15 is formed in the second embodiment.
Both the gas introduction port 13 and the air introduction port 33 of the air supply passage 25 are formed on the bottom side of the burner 31. For example, as shown in FIG. twenty five
Both of the air introduction ports 33 may be formed on the side surface side of the burner 31. As described above, the shapes and the like of the air supply passage 25 and the premix passage 15 are not particularly limited and may be set appropriately.

Further, in the above embodiment, the air jet port
24 and the sleeve flame 28 are formed in a trapezoidal shape or a boat shape so that the length of the side of the burner body 12 facing the flame mouth 16 is long. The shape of the mouth 28 is not particularly limited.
It may be formed into a shape as shown in (a) of FIG.
May be formed into a shape as shown in FIG.

Further, the burner and the burner unit of the present invention are not applied only to the single-function water heater as shown in FIG. 10, but various combustions such as a compound water heater, a bath heater, a gas heater, etc. It is widely applied to devices.

[0030]

According to the burner of the present invention, the air supply passage for the combustion assisting air for the premixed gas is formed in such a manner that the burner body having the premixed passage for forming the premixed gas is sandwiched from both sides, At the outlet side of this air supply passage, air jets for jetting combustion-assisting air are formed on both sides of the premixed gas jetted from the burner main body flame port. Combustion of the premixed gas can be efficiently performed using the combustion-assisting air ejected to the.

Further, according to the burner unit of the present invention in which a plurality of the burners of the present invention are arranged in an array, the air supply passage is formed, so that the burner unit for combustion assistance is provided like the conventional burner unit. Even if a pressure equalizing plate for equalizing and distributing the air is provided, the combustion assisting air is pressure equalized and the combustion assisting air can be jetted to both sides of the premixed gas through the air supply passage. It is possible to omit the pressure equalizing plate that was indispensable to the burner unit.

Therefore, according to the burner unit of the present invention, in the conventional burner unit, it is possible to solve the problem of deterioration of the burner combustion state due to oil clogging, dust clogging, etc. generated in the holes of the pressure equalizing plate, which is always good. Burner combustion can be performed in the combustion state, and the life of the burner unit can be extended. Further, since the pressure equalizing plate and the like can be omitted, the burner unit can be simplified accordingly, and the height of the burner unit can be reduced, so if this burner unit is applied to a combustion device, It is also possible to reduce the size of the combustion device.

Further, according to the burner and the burner unit of the present invention in which the sleeve-fire forming passage is provided between the burner body and the air supply passage, the main body generated by the combustion of the premixed gas ejected from the flame mouth of the burner body is provided. Even if the ejection speed of the premixed gas ejected from the flame mouth of the burner body is much faster than the combustion speed of this premixed gas, by forming the sleeve fire on both sides of the flame, This makes it possible to suppress the lift phenomenon of the main flame.

[Brief description of drawings]

FIG. 1 is a main part configuration diagram showing a first embodiment of a burner unit according to the present invention.

FIG. 2 is a plan view of the first embodiment example.

FIG. 3 is an explanatory diagram showing an operation of the embodiment.

FIG. 4 is a main part configuration diagram showing a second embodiment of a burner unit according to the present invention.

FIG. 5 is a plan view of the second embodiment example.

FIG. 6 is an explanatory view showing an operation of a burner used in the second embodiment by a sectional view.

FIG. 7 is an explanatory diagram showing an operation of the second embodiment example.

FIG. 8 is an explanatory view showing another embodiment of the burner according to the present invention.

FIG. 9 is an explanatory view showing another example of the formation state of the air ejection ports and sleeve flame openings in the burner according to the present invention.

FIG. 10 is an explanatory view showing a conventional burner unit incorporated in a combustion device.

FIG. 11 is an explanatory diagram showing an arrangement state of burners in a conventional burner unit.

FIG. 12 is an explanatory diagram of a pressure equalizing plate used in a conventional burner unit.

FIG. 13 is an explanatory diagram showing an operation of a conventional burner unit.

[Explanation of symbols]

 12 Burner body 15 Premix passage 16 Flame outlet 21 Burner unit 24 Air jet 25 Air supply passage 26 Sleeve fire formation passage 28 Sleeve flame outlet 31 Burner

Claims (3)

[Claims] 1. A burner body having a premixing passage for mixing fuel gas and air therein, the fuel gas and air being mixed in the premixing passage at an outlet side of the premixing passage. A flame port for ejecting and burning the premixed gas is provided, and an air supply passage forming plate is provided so as to sandwich the burner main body from both sides, and the air supply passage forming plate and the burner main body are provided. An air supply passage for combustion-assisting air is formed between the two, and air outlets for ejecting combustion-assisting air are formed on both sides of the premixed gas ejected from the flame outlet on the outlet side of the air supply passage. Characteristic burner. 2. A premixed gas which is introduced from a part of the premixed gas between the burner body and the air supply passage as a sleeve-fire forming gas through the premixing passage and ejected from the flame mouth of the burner body. 2. The burner according to claim 1, wherein sleeve fire forming passages for ejecting sleeve fire forming gas are provided on both sides of the burner body so as to sandwich the burner main body from both sides. 3. A burner unit comprising a plurality of the burners according to claim 1 or 2 arranged in an array.