JP3059904B2 - Gas combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas combustion device and, more particularly, to a gas combustion device used for a water heater or a heater.

[0002]

2. Description of the Related Art FIGS. 1 and 2 show an example of a conventional gas combustion apparatus used for a water heater or a heater.
Is known.

[0003] In these figures, a gas combustion device indicated by reference numeral 1 comprises a burner case 3 forming a combustion chamber 2,
A plurality of burners 4 disposed inside the burner case 3, a nozzle case 6 provided with a plurality of gas nozzles 5 opposed to the gas supply units 4 a of the respective burners 4, Fan 7 for feeding combustion air to the gas supply section 4a and gas supply section 4a of each burner 4.
A first air volume adjusting member 8 which is disposed to face the gas supply portions 4a, and has a ventilation hole 8a formed therein, which covers the gas supply portions 4a and regulates a supply amount of the primary air for combustion sent to each gas supply portion 4a; A large number of ventilation holes are provided so as to cover below the plurality of burners 4 and control the rectification of the secondary air supplied to the combustion portion 4b of the burners 4 and the supply amount of the secondary air. The configuration is roughly constituted by the second air volume adjusting member 9.

The air blown into the combustion chamber 2 by the blower fan 7 causes the diffuser effect generated when the gas is injected from each gas nozzle 5 (indicated by an arrow a in FIG. 2) to cause an air blow in FIG. As shown in FIG. 5, the gas supply unit 4 of the burner 4 is sucked through the first air volume adjusting member 8 and mixed with gas as primary air.
a from the lower part of the burner 4 to the combustion part 4b via the side part through the ventilation hole of the second air volume adjusting member 9 (indicated by an arrow C in FIG. 2). In the combustion part 4b, it is provided for combustion as secondary air.

The air is supplied to the first air volume adjusting member 8.
The flow is rectified while passing through the second air volume adjusting member 9, so that a uniform supply amount is ensured.

[0006]

However, such a conventional gas combustion apparatus 1 has the following problems to be improved.

That is, generally, there are dozens of types of gases used for combustion, and air-fuel ratios for satisfactorily burning these gases are different from each other. Therefore, the primary air flow rate varies depending on the type of gas used. And it is necessary to set the secondary air volume.

In order to adjust the amount of primary air, the opening area of the ventilation hole 8a of the first air volume adjusting member 8 must be adjusted.
In order to adjust the amount of secondary air, it is necessary to adjust the shape and arrangement of a large number of air holes provided in the second air volume adjusting member 9, but these air holes themselves have no adjusting function. Therefore, for the above-mentioned adjustment, it is necessary to exchange it with another air volume adjusting member having a different opening area or a different shape or arrangement.

However, in the above-mentioned conventional gas combustion apparatus 1, in particular, since the second air volume adjusting member 9 for adjusting the secondary air volume is attached below the burner 4, this second air volume adjusting device is used. In order to replace the member 9, it is necessary to remove the entire unit including the burner 4, and to exchange the first air volume adjusting member 8 and the second air volume adjusting member 9 separately. Accordingly, the operation of adjusting the supply air amount is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. When adjusting the amounts of primary air and secondary air supplied to a burner, gas combustion which can easily perform the adjustment work is provided. It is intended to provide a device.

[0011]

According to a first aspect of the present invention, there is provided a gas combustion apparatus provided with a burner installed in a combustion chamber and a gas supply section of the burner. A first air volume adjusting member for adjusting the amount of primary air supplied into the burner; and a plurality of air volume adjusting members provided below the burner for adjusting the amount of secondary air supplied around the burner. A second air volume adjusting member having a ventilation hole formed therein, wherein the first air volume adjusting member is superimposed on the second air volume adjusting member, and a part of the air hole is formed. A shielding means for closing is provided.

[0012]

According to the gas combustion apparatus of the first aspect of the present invention, by mounting the first air volume adjusting member at a predetermined position with respect to the burner, primary air supplied to the burner by the first air volume adjusting member is provided. The air is rectified and its supply is regulated.

In addition, simultaneously with the mounting of the first air volume adjusting member, the shielding means connected to the first air volume adjusting member is overlapped with the second air volume adjusting member.
A part of the air hole formed in the second air volume adjusting member is closed.

Thus, the secondary air is regulated by the second air volume adjusting member, and the opening area of the ventilation hole is reduced, so that the supply amount of the secondary air in the second air volume adjusting member is adjusted. .

Here, the attaching / detaching operation of the first air volume adjusting member is performed as follows.
This is performed irrespective of devices that do not need to be removed, such as a burner.
By performing attachment / detachment of the air volume adjustment member, the equipment to be removed is suppressed to a minimum, and attachment / detachment of the first air volume adjustment member is a work for an exposed portion of the gas supply section of the burner. By synergy,
The work of adjusting or changing the amount of primary air and the amount of secondary air is greatly simplified.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In the following description, the same parts as those in FIGS. 1 and 2 will be denoted by the same reference numerals, and the description will be simplified.

In FIG. 3, reference numeral 10 denotes a gas combustion apparatus according to the present embodiment. The gas combustion apparatus 10 is provided in a burner 4 installed in a combustion chamber 2 and a gas supply section 4a of the burner 4. And a first air volume adjusting member 11 for adjusting the supply amount of the primary air supplied into the burner 4.
And a second air volume adjusting member 9 provided below the burner 4 and formed with a number of ventilation holes for adjusting the amount of secondary air supplied to the combustion portion 4b of the burner 4. The first air flow adjusting member 11 has a schematic configuration in which a shielding means 12 that overlaps the second air flow adjusting member 9 and closes a part of the ventilation hole is provided.

Next, in more detail, the burners 4 are arranged in parallel and unitized as in the prior art, and are fixed at a predetermined position inside the burner case 3 surrounding them. In addition, the second air volume adjusting member 9 is integrally attached via a stay 13 below the second air volume adjusting member 9.

In the present embodiment, the first air volume adjusting member 11 has a substantially L-shaped section formed by pressing a metal plate.
A horizontal portion 11a and a vertical portion 11b are provided in the shape of a letter, and the vertical portion 11b covers the gas supply portion 4a of each of the burners 4 when attached to the burner case 3. And a ventilation hole 11c which is communicated with each of the gas supply portions 4a.
Are formed as shown in FIG.

Further, as shown in FIGS. 5 and 6, the shielding means 12 protruding in a direction away from the vertical part 11b is extended from the horizontal part 11a of the first air volume adjusting member 11. When the first air volume adjusting member 11 is attached to the burner case 3,
The lower surface of the air volume adjusting member 9 is opposed to or brought into contact with the lower surface, thereby covering a part of the second air volume adjusting member 9.

On the other hand, a pair of holes 14 formed in the vertical portion 11b are provided for inserting bolts for fixing the first air volume adjusting member 11 to the stay 13.

The protruding length and width of the shielding means 12 extended from the first air volume adjusting member 11, the opening area of the ventilation hole 11c formed in the vertical portion 11b, a combination thereof, and the like. Is set according to the type of gas to be used, and a plurality of types of first air volume adjusting members 11 are prepared in advance according to the assumed gas to be used.

Next, the operation of the present embodiment thus configured will be described.

When it becomes necessary to change the supply amount of the primary air and the secondary air, first, as shown in FIG. 3, the nozzle case 6 in which the gas nozzles 5 are mounted is removed from the burner case 3. The side portion of the burner case 3 is opened to expose the first air volume adjusting member 11.

Thus, the bolt fixing the first air volume adjusting member 11 is removed to release the fixing, and the first air volume adjusting member 11 is pulled out from the burner case 3.

Next, the new first air volume adjusting member 11 is
The shielding means 12 is inserted into the burner case 3 with the front face thereof facing forward, and the vertical portion 11 b of the first air volume adjusting member 11 is fixed to the stay 13.

As a result, the first air volume adjusting member 11 and the shielding means 12 are fixed at predetermined positions in the burner case 3, the vertical portions 11b are aligned with the gas supply portions 4a of the respective burners 4, and When the shielding means 12 is brought into contact with the lower surface of the second air volume adjusting member 9, a part of the ventilation hole in the second air volume adjusting member 9 is closed, and the opening area of the second air volume adjusting member 9 is changed. You.

By re-attaching the nozzle case 6 to the burner case 3, the burner case 3 is closed, and the nozzles 5 attached to the nozzle case 6 are connected to the vertical portion 11b. The work is completed by being passed through the formed ventilation holes 11c and inserted into the gas supply units 4a of the respective burners 4.

When the first air volume adjusting member 11 and the shielding means 12 are set in this way, the primary air volume is adjusted by the ventilation holes 11c of the first air volume adjusting member 11, and the opening ratio is changed. The secondary air amount is adjusted by the two air amount adjusting member 9, and an appropriate air supply amount according to the used gas is secured.

By properly adjusting the amount of secondary air, the burnability of the burner 4 is improved, and as a result, the amount of primary air to be reduced can be reduced and good combustion can be obtained.

When changing the respective air amounts, the work can be performed not only by replacing the first air volume adjusting member 11 but also at a position where the work can be visually recognized from the outside of the burner case 3. This greatly simplifies the work.

Therefore, it is possible to change the specifications of the equipment for many kinds of gases by a simple operation.

The various shapes and dimensions of the components shown in the above embodiment are merely examples, and can be variously changed based on the type of equipment using the gas combustion device, design requirements, and the like.

[0035]

As described above, according to the gas combustion apparatus of the present invention, the first air flow rate adjusting member is superimposed on the second air flow rate adjusting member and closes a part of the ventilation hole. By adjusting the supply amount of the primary air supplied to the burner by the first air volume adjusting member, and by superposing the shielding means on the second air volume adjusting member, The amount of air supply can be adjusted.

Such an adjusting operation can be performed not only by replacing the first air volume adjusting member but also by performing the operation at a position visible from the outside of the device, thereby greatly increasing the operation. Therefore, it is possible to easily change the specifications of equipment corresponding to many kinds of gases.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one structural example of a conventional gas combustion device.

FIG. 2 is a longitudinal sectional view showing one structural example of a conventional gas combustion device.

FIG. 3, showing an embodiment of the present invention, is a side view showing a state where main parts are disassembled.

FIG. 4 is a front view of a first air volume adjusting member according to the embodiment of the present invention.

FIG. 5 is a plan view of a first air volume adjusting member according to an embodiment of the present invention.

FIG. 6 shows one embodiment of the present invention, and is a side view of a first air volume adjusting member.

[Explanation of symbols]

 Reference Signs List 2 Combustion chamber 4 Burner 4a Gas supply unit 4b Combustion unit 9 Second air volume adjustment member 10 Gas combustion device 11 First air volume adjustment device 11c Vent 12 Shielding means

Claims (1)

(57) [Claims] A burner installed in a combustion chamber; a first air volume adjusting member provided in a gas supply unit of the burner for adjusting a supply amount of primary air supplied into the burner; A second air flow adjusting member provided below and having a plurality of ventilation holes formed therein for adjusting a supply amount of secondary air supplied around the burner; A gas combustion device, wherein a shielding means is provided on the air volume adjusting member so as to be superimposed on the second air volume adjusting member and closes a part of the ventilation hole.