JPH02176308A - Burning device - Google Patents

Abstract

PURPOSE:To miniaturize a furnace with low noise by mixing fuel and air and providing a mixing chamber member provided with a burner port for jetting the premixture and an inclined plate and the like for crossing in the direction of jetting the mixture to jet air. CONSTITUTION:A premixture jetted from a burner port 13 is transversely distributed more in the neighborhood of a inclined air plate 18 and less in the center thereof to supply a furnace 20. On the other hand, secondary air is allowed to flow in an air chamber 14, part thereof is controlled at a specified flow in a flow control opening 16 to flow in an air chamber 15. The air allowed to flow in the air chamber 15 is jetted approximately in parallel with the direction of jetting mixture from a baffle air plate 19 approximately on the same plane as the burner port 13 to form a stable hold flame F1. The secondary air of a remain in the air chamber 14 passes through an inclined air opening 18a of the air plate 18 to supply the chamber 20 with a crossed angle in the direction of jetting the premixture and to forcibly mix with the mixture so as to form a flame F2 of small flame length. At this time, since the mixture is supplied to the air plate 18 by a block plate 12, combustion is promoted further.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention aims to reduce noise by forcibly supplying secondary air to a flame to form a stable flame, and to reduce the size of equipment by performing high-load combustion. This relates to a combustion device for use in homes that has been designed to be more compact.

2. Description of the Related Art Conventionally, this type of combustion apparatus has a configuration as shown in FIG.

In FIG. 3, a mixture chamber/flame port 2 is provided in the center, and a pair of air chambers 3 for inclined air are provided on both sides thereof. A pair of air chambers for flame-holding air are in contact with the air chamber 3 on both sides of the flame port 2 via a control number j. The inclined and flame-holding air chambers 3, ≠ are provided with respective air lowers, ♂, which open into the combustion chamber B. Here, the air lower is provided on the downstream side of the flame nozzle 2 and has an angle of intersection with the premixed air jetted from the flame nozzle 2, and the air nozzle r is provided substantially parallel to the flame nozzle 2 on the same plane. ing. The combustion chamber 6 is surrounded by a heat exchange dome and on the downstream side by heat exchange fins IO.

The air-fuel mixture ejected from the flame port 2 is supplied to the roasting chamber B. On the other hand, the secondary air first enters the air chamber 3, and part of it is controlled to a predetermined flow rate by a control plate j and enters the air chamber 3. Air chamber≠
The secondary air that has entered is supplied from the air port t to the periphery of the flame port 2 almost parallel to the ejection direction of the premixture, creating a stable flame F.
Form <.

In addition, the remaining secondary air in the air chamber 3 passes through the air lower,
The mixture is supplied into the combustion chamber 6 at an angle of intersection with the jetting direction, and is forcibly mixed with the mixture to form a flame F with a small flame length.The combustion gas that has completed the combustion reaction is sent to the heat exchange drum and fin IO. After heat exchange, it was released into the outside air (for example, JP-A-58-75771@publication)
.

Problem to be Solved by the Invention However, in the above configuration, the jetting distribution of the air-fuel mixture jetted from the flame port 2 in the cross-sectional direction is almost uniform, so that sufficient secondary Air is supplied and combustion is completed quickly, but the mixture ejected from the center of the flame nozzle requires some time for the secondary air ejected from the inclined air lower to reach it. ,
There was a problem with improving flammability.

Furthermore, since the air-fuel mixture is ejected almost uniformly from the entire surface of the flame port 2, there is a problem in that backfire is likely to occur.

The present invention is intended to solve such conventional problems, and aims to reduce the size of the combustion chamber and expand the stable combustion range while reducing noise.

Means for Solving the Problems The present invention provides a combustion engine which is arranged downstream of mixing fuel and air to form a premixture, and includes a large number of flame ports having means for ejecting the premixture on both sides in the longitudinal direction. a mixture chamber member having a flame port, and a large number of serrated zigzag inclined air ports that blow out air in a direction crossing the jetting direction of the air-fuel mixture ejected from the flame port, and an inclined air plate provided on both sides in the longitudinal direction on the downstream side of the burner port; and a burner port provided on both sides in the longitudinal direction on the upstream side of the inclined air plate and on substantially the same horizontal plane as the surface of the burner port. A base drum is provided with a flame-holding air plate having a flame-holding air port that blows out air parallel to the blowing direction of the air-fuel mixture ejected from the air-fuel mixture. Provide an air chamber to send air,
The base drum includes the air chamber and an air chamber for sending air that crosses the air-fuel mixture and blows out air to the air port of the inclined air plate, and includes a flame stabilizing air plate, an inclined air plate, and a flame port part. The combustion chamber has a heat exchanger section provided on the downstream side of the combustion chamber.

Effect of the present invention With the above-described configuration, a stable and reliable flame-holding flame is formed by the flame-holding air jetted from the flame-holding air port, and a flame surface is formed by the inclined air jetted from the tilted air port; By making the flame-holding flame surface continuous, the disturbance of the entire flame surface can be reduced.

In addition, the flame surface formed by the inclined air has inclined air ports arranged in a zigzag pattern, so the reaction surface becomes a large pleated flame, and the inclined air is ejected at an angle of intersection with the direction of the air-fuel mixture. As a result, the combustion reaction with the air-fuel mixture is promoted and the flame length can be shortened. Furthermore, the cross-sectional distribution of the air-fuel mixture ejected from the flame nozzle is large at both ends along the slanted air port, and less near the center where it takes time for the slanted air to arrive. is promoted.

In addition, the flow velocity of the air-fuel mixture ejected from the burner port is higher than that in the case where the burner ports are uniformly distributed over the entire burner port group due to the blocking plate, and the portion of the burner port without the burner port is red-hot from the burner port. On the other hand, since this is the part that is cooled by the air-fuel mixture, the temperature rise at the flame opening can be reduced.

Embodiment FIG. 1 is a vertical sectional view of an embodiment of the combustion apparatus of the present invention, and FIG.
The figure shows an enlarged perspective view of the main part of FIG. 1.

The configuration of the combustion device of the present invention will be explained.

In the figure, /l is the outer drum //A and the inner drum //
B is an air port / J'a is a perforated slanted air plate / Air port is a horizontally arranged base drum / 9a is a perforated flame-holding air plate / 2. The heat exchange drum /2 constitutes the chamber 2θ, /2 constitutes the mixture chamber /2f3, and the mixture chamber member is bent into an L shape and has a flame port /3 on the upper end surface, and 21 indicates a fin. .

The vertical part of the mixture chamber member /2 is tightly fitted into the inner drum //B with the flame opening part /3 on top, and the flame opening part 13 is on the same plane as the flame holding air plate l. A blocking plate 2A is arranged in the center of the flame opening part 13 in the longitudinal direction so that gas holes pass through both sides, and the air chamber member is surrounded by the lower part of the flame stabilizing air plate 1. /J'A is provided to constitute an air chamber /j, a flow rate control port 16 is provided at the bottom of the air chamber member /J'A, and an outer door is installed.//A1 inclined air plate lt1 air chamber member/
J'A and the mixture chamber member 12 constitute an air chamber l≠,
The air ports /lra of the inclined air plate /F are not provided on the entire surface as shown in FIG. 2, but are provided in a sawtooth shape.

An inclined air plate/r having an inclined air outlet/r is a flame outlet part 1
The air-fuel mixture is provided so as to eject oblique air across the ejection direction of the air-fuel mixture ejected from the air-fuel mixture.

The combustion chamber 20 is surrounded by a heat exchange drum 17 and on the downstream side by heat exchange fins 2/.

The operation of the combustion device of the present invention will be explained.

The premixture ejected from the flame port /3 is transferred to the inclined air plate it.
It is fed into the combustion chamber 20 with a cross-sectional distribution, with more near the center and less in the middle.

On the other hand, the secondary air first enters the air chamber l≠, is controlled to a predetermined flow rate by the flow rate control port /4, and enters the air chamber /j. The secondary air that has entered the air chamber /j is ejected almost parallel to the jetting direction of the air-fuel mixture through the flame-holding air plate 1, which is on the same plane as the flame opening part /3, and creates a stable flame-holding flame F□. Form.

Also, the remaining secondary air in the air chamber l≠ is the inclined air chamber/r
It passes through the inclined air port /J'a and is supplied into the combustion chamber 20 at an angle of intersection with the injection direction of the premixture, and is forcibly mixed with the mixture to form a flame F with a small flame length. At this time, the air-fuel mixture is deflected toward the inclined air plate /♂ by the blocking plate 12, so that the combustion reaction is further promoted. The combustion gas that has completed the combustion reaction undergoes heat exchange with the heat exchange drum 17 and the fins 2/, and is then released to the outside air.

In addition, in the above embodiment, the blocking plate/
According to No. 2, the air-fuel mixture ejection distribution was increased near the inclined air plate and decreased near the center, but the same effect can be obtained even when no burner port is provided at the center of the burner port portion.

Effect of the invention According to the combustion apparatus of the present invention, the following effects can be obtained.

(1,) The distribution of the air-fuel mixture ejected from the flame port in the cross-sectional direction is large at both ends along the slanted air port, and is small near the center where it takes time for the slanted air to arrive. When the air-fuel mixture is distributed in accordance with the degree of arrival of the inclined air, the combustion reaction is promoted, the flame length is shortened, and the combustion chamber can be downsized.

(2) The flame surface formed by the inclined air is arranged in a serrated zigzag pattern with the inclined air ports, so the reaction surface becomes a large pleated flame 9, and the inclined air is directed in the direction of the air-fuel mixture jetting out. On the other hand, since the fuel is ejected at a crossing angle, the combustion reaction with the air-fuel mixture is promoted, the flame length can be shortened, and the combustion chamber can be made smaller.

(3) The jet flow velocity of the air-fuel mixture jetted out from the flame nozzle of the flame nozzle is larger than when there are flame nozzles uniformly over the entire flame nozzle due to the blocking plate, so the jet flow velocity of the mixture is Since the primary flame, which is maintained at a position that is balanced with the combustion speed of the air-fuel mixture, is maintained downstream of the flame nozzle, red heat at the flame nozzle can be suppressed and backfire becomes difficult to occur.

(4) The burner port without a burner port is a part that is cooled by the air-fuel mixture against the red heat of the burner port, so the temperature rise at the burner port can be reduced. - Since the flame is held on the downstream side of the flame nozzle, the red heat of the flame nozzle can be suppressed, making it difficult to cause backfire.

(5) A stable and reliable flame is formed by the flame-holding air ejected from the flame-holding air port, and a flame-holding flame surface is formed by the inclined air ejected from the inclined air port and the flame-holding flame surface. By making them continuous, the turbulence of the entire flame surface can be reduced, so the combustion noise generated by the flame turbulence is reduced, and noise can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the combustion apparatus of the present invention, FIG. 2 is an enlarged perspective view of essential parts of the combustion apparatus of the present invention, and FIG. 3 is a cross-sectional view of a conventional combustion apparatus. ll: Base drum, //A: Outer drum, //B: Inner drum, 12: Air mixture chamber member, 72A: Closing plate,
/, 2B: Mixture chamber, /3: Flame opening, /g: Air chamber, /j: Air chamber, 16: Flow rate control port, /7: Heat exchange drum, /Za: Inclined air plate, /fa : Inclined air port, L: Flame holding air plate, 19a: Flame holding air port, 2
Q: Combustion chamber, 2/: Fin.

Claims (1)

[Claims] A mixture chamber member that is disposed on the downstream side of mixing fuel and air to form a premixture, and is equipped with a flame port section provided with a large number of flame ports, and has means for jetting out the premixture on both sides in the longitudinal direction. and a plurality of sawtooth-like zigzag inclined air ports that blow out air in a direction crossing the jetting direction of the air-fuel mixture ejected from the flame nozzle, and both sides in the longitudinal direction on the downstream side of the flame nozzle. an inclined air plate provided on the upstream side of the inclined air plate and on both sides in the longitudinal direction that is on a horizontal plane substantially in the same direction as the surface of the burner port, and a jetting direction of the air-fuel mixture ejected from the burner port; A base drum is provided with a flame-stabilizing air plate having flame-stabilizing air ports that eject air in parallel, and an air chamber is provided below the flame-stabilizing air port to send air controlled at a predetermined flow rate, and the air chamber and an air chamber for sending air that crosses the mixture and blows out air to the air port of the inclined air plate, the base drum is configured with:
A combustion device comprising a combustion chamber composed of a flame-holding air plate, an inclined air plate, and a flame port, and a heat exchange part provided on the downstream side of the combustion chamber.