JP2518061Y2 - Burner - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner used for stoves and other household appliances.

[0002]

2. Description of the Related Art Conventionally, secondary air having a secondary flame opening on the upper surface.
Cover the primary flame mouth with a cover to remove the secondary air to the primary flame mouth.
The supply is limited, and the primary combustion and secondary combustion at the primary flame mouth are performed.
A burner with a formula that prevents the NOx value from becoming high by dividing it into secondary combustion at the flame mouth is known . In this case the primary flame mouth
Air holes are provided on both sides of the part, but secondary air
Supplying into the secondary air cover.

[0003]

[Problems to be solved by the device] However,
If the combustion capacity is switched by setting the
When the amount of air supplied from the pores is too large and small combustion occurs
The combustion temperature becomes high and the Nox value cannot be lowered.
There is a problem that it becomes bad. The present invention aims to obtain a burner without such a defect.

[0004]

In order to achieve the above object, the present invention provides a burner according to claim 1 in which a primary flame opening portion having a plurality of primary flame openings and both sides of the primary flame opening portion are provided. Is provided
An air hole for supplying combustion air to the primary burner port unit, secondary having secondary burner port portion on the upper surface brewing covering the primary burner port unit and the air porosity
It has an air cover so that the combustion capacity can be switched.
In the burner, is there a wall between the primary flame mouth and the air hole?
It is characterized in that an auxiliary cover consisting of is provided.

The burner according to claim 2 is the burner according to claim 1.
In the burner installed, the auxiliary cover must have a communication hole.
And are characterized.

The burner according to claim 3 is the burner according to claim 1.
In the mounted burner, the secondary air cover is provided from the air hole.
A sub air hole that shares a part of the secondary air supplied into the
It is characterized in that it is provided inside the auxiliary cover.

[0007]

The burner according to claim 1 having the above-mentioned structure.
Is an auxiliary cover consisting of a wall between the primary flame mouth and the air hole.
By providing a bar, the opening area of the air hole can be
Even if the size corresponds to combustion, the space inside the auxiliary cover
It is possible to limit the inflow of air, and N
The Ox value does not increase.

In the burner according to claim 2, the air
A part of the air supplied from the hole is supplemented by the auxiliary power through the communication hole.
Can be supplied in the bar.

In the burner according to claim 3, the sub-air
Secondary air can be supplied from the pores into the auxiliary cover.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of implementing the present invention will be described with reference to the attached drawings.
In the drawing, 1 indicates a burner, which is a gas nozzle 2
Facing the fuel-air inlet 3, mixing tube 4 and distribution chamber 5
A burner body 1a, a flame hole plate 7 having a primary flame mouth portion 6 having a large number of primary flame holes 6a formed in the opening 5a on the upper surface of the distribution chamber 5 of the burner body 1a, and the flame. The secondary air cover 8 is provided on the upper surface of the perforated plate 7 so as to cover the primary flame opening portion 6, and the secondary flame opening portion is provided on the upper surface of the secondary air cover 8 along the length direction thereof. Equipped with 8a.

The burner body 1a is shown in FIGS.
As shown in FIG. 3, the distribution chamber 5 is provided with flange-shaped portions 9 extending on both left and right sides, and rising pieces 10 that rise from both ends of the flange-shaped portions 9 are provided, and the flame hole plate 7 overlaps with the collar-shaped portions 9. The air holes 11 are arranged along the primary flame port 6 on both sides of the flange-shaped part 9 and the flame hole plate 7, that is, on both sides of the primary flame port 6. The burner 1 is not particularly shown.
However, the burning capacity can be switched by known means.

In the case shown in FIGS. 1 and 4, the primary flame is
Auxiliary cover 2 composed of a wall portion between the mouth portion 6 and the air hole 11.
1, the secondary air from the air hole 11 to the primary flame mouth portion 6 is provided.
The NOx value at the time of small combustion was reduced by limiting the supply of.

If this value is shown, it is as follows.

[0014] However, the height of the secondary air cover is 50 mm, the width is 39 mm, the height of the auxiliary cover is 10 mm, and the space is 16 mm.

This is because the flame that burns in the primary flame mouth portion 6 is small when the combustion is small, and the air amount limitation by the cover works effectively.
It is thought that the NOx value can be greatly reduced.
In the structure shown in FIG. 5, the auxiliary cover 21 is provided with a communication hole 23.
Secondary supplied from the communication hole 23 through the air hole 11.
A part of the air is supplied into the auxiliary cover 21.
In addition, in the structure shown in FIG.
A sub that shares a part of the secondary air supplied into the air cover 8.
The air holes 24 are provided inside the auxiliary cover 21, that is, the auxiliary cover.
21 is provided on the flame hole plate 7 to surround a part of the secondary air.
The auxiliary cover 21 is supplied. That is, the air hole 1
1 and the total area of the sub air holes 24 equal to the total area of the air hole 11 shown in FIGS. 3 to 5, in the air when a large combustion in the secondary air cover 8 is prevented from becoming excessive.

It should be noted that when both sides of the flame hole plate 7 and both side portions of the flame hole plate 7 close to the flame hole plate 7 are provided with rising pieces 12, the upper surface of the flame hole plate 7 is raised when the secondary air cover 8 is applied. Upper pieces 10, 12
To close the gap between the secondary air cover 8 and the flame hole plate 7,
This prevents excessive air from flowing into the secondary air cover 8. Reference numeral 13 denotes a flame detector such as a thermocouple facing one end of the primary flame mouth portion 6, and 14 is provided on both upper sides of the primary flame mouth portion 6 facing the flame detector 13. 2 shows a flame shaping plate for adjusting the flame from 6, and the primary flame in the portion surrounded by a pair of left and right flame shaping plates 14 protruding from the left and right sides so that the center is higher, as is clear from FIGS . 2 and 4. Mouth 6
The flame from the guide plate 14a, 1 which constitutes the flame shaping plate 14
As it rises along 4a, the flame is shaped and stretched out to prevent instability. The flame detector 13 is provided on the mounting plate 22 which faces the part of the primary flame opening 6 through the mounting hole 16 and closes the end of the flame shaping plate 14 and also functions as a partition. Attachment hole 16 for the flame detector 13
Is provided with a through hole 17 communicating with the lower part thereof.
The air supplied through the air hole 11 on the outer side of 2 through the through hole 17 is supplied to the root of the flame from the primary flame mouth 6 facing the flame detector 13, and the flame detector 13 The flame coming from the primary flame mouth 6 was stabilized.

The through hole 17 is a mounting hole 1 for inserting a thermocouple.
The primary flame mouth part 6 is not limited to one communicating with the lower part of 6
It may be separately provided as long as it is supplied to the root of the flame. In this embodiment, the mounting plate 22 is provided inside the rising piece 12 and the through hole 17 is provided in the mounting plate 22. Mounting plate 22
Alternatively, the rising piece 12 may be provided with the through hole 17. If the air holes 11 in the portion covered by the flame shaping plate 14 are made larger than those in the other portions, it is possible to prevent the flame in the portion from further extending and becoming unstable due to lack of air. Reference numeral 18 denotes an igniter facing the primary flame opening 6 at the end opposite to the end facing the flame detector 13 of the primary flame opening 6. The flame detector 13 uses, for example, an electromotive force generated when the flame detector 13 is heated by the flame of the primary flame mouth portion 6 to supply gas 19
When the output of the flame detector 13 due to the flame of the primary flame opening 6 decreases due to the misfire and lack of oxygen in the room air, etc., the valve 20 is closed by keeping the valve 20 interposed in the valve open. Used to control.

[0018]

Since the present invention has the above-mentioned structure, it has the following effects. In the burner according to claim 1 having the above-mentioned structure , a wall is provided between the primary flame mouth portion and the air hole.
By providing an auxiliary cover consisting of
Even if the area is set to a size corresponding to combustion during large combustion,
The auxiliary cover restricts the inflow of air into the auxiliary cover.
Therefore, the NOx value increases even during small combustion with a small amount of combustion.
And not.

According to the burner of claim 2 ,
Like the burner described in 1, when the open area of the air holes is large
Even if the size corresponds to the combustion of
Of course, it is possible to limit the inflow of air into the auxiliary cover,
Supplying from the air hole by providing a communication hole in the auxiliary cover
Part of the generated air is supplied into the auxiliary cover through the communication hole.
The NOx value is high even during small combustion with a small amount of combustion.
Never.

According to the burner of claim 3,
Like the burner described in 1, when the open area of the air holes is large
Even if the size corresponds to the combustion of
Of course, it is possible to limit the inflow of air into the auxiliary cover,
Secondary air supplied from the air holes into the secondary air cover
An auxiliary air hole that shares a part of the air is provided inside the auxiliary cover.
Since it is provided, the auxiliary cover 2
It is possible to supply the secondary air and NO even during small combustion with a small amount of combustion.
The x value does not increase.

[Brief description of drawings]

FIG. 1 is a cutaway side view of an embodiment of the present invention.

FIG. 2 is a partial perspective view of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a plan view of a portion of FIG.

FIG. 5 is a cutaway side view of another embodiment.

FIG. 6 is a cutaway side view of still another embodiment.

[Explanation of symbols]

1 Burner 6 Primary flame mouth 8 2
Next air cover 21 Auxiliary cover 23 Communication hole 24
Sub air hole

Claims (3)

(57) [Scope of utility model registration request] 1. A primary flame mouth portion having a plurality of primary flame holes,
Air holes that are provided on both sides of the primary flame opening and supply combustion air to the primary flame opening and cover the primary flame opening and the air holes.
And a secondary air cover having a secondary flame opening on its upper surface,
In a burner capable of switching the combustion ability,
An auxiliary cover consisting of a wall is installed between the secondary flame port and the air hole.
A burner characterized by the fact that it has been turned off . 2. A special feature that a communication hole is provided in the auxiliary cover.
The burner according to claim 1, which is used as a characteristic. 3. The inside of the secondary air cover is supplied from the air hole.
The auxiliary air hole that shares a part of the supplied secondary air
The cover according to claim 1, wherein the cover is provided inside the cover.
Burner .