JPH02178504A - combustion device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 household combustion device designed to

BACKGROUND OF THE INVENTION Conventional prior art combustion devices of this type include those having structures as shown in FIGS. 3 and 4.

In FIGS. 3 and 4, a mixture chamber 1 and a flame port 1 are 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 connected to the air chamber 3 via a control plate j on both sides of the flame port 2. The inclined and flame-holding air chamber 3,≠ is provided with an air lower, r, in each inclined air plate and flame-holding air plate opening into the combustion chamber 6. Here, the air lower is provided in a sawtooth zigzag manner on the inclined air plate, and is provided downstream of the burner port A and at an angle of intersection with the premixed mixture ejected from the burner port A, and is provided with an angle of intersection with the premixed air jetted from the burner port A. are provided on the same plane and substantially parallel to the burner port 2. The combustion chamber B is surrounded by a heat exchange drum and on the downstream side by a heat exchange fan 10.

The air-fuel mixture ejected from the flame port λ is supplied to the combustion chamber B. On the other hand, the secondary air first enters the air chamber 3, and a portion of it enters the control board! The flow is controlled to a predetermined flow rate and enters the air chamber. The secondary air that has entered the air chamber is supplied from the air port ♂ to the vicinity of the flame port ♂ almost parallel to the ejection direction of the premixture, creating a stable flame F.
'1 is formed.

In addition, the remaining secondary air in the air chamber 3 passes through the air lower,
It is supplied into the combustion chamber 6 at an angle of intersection with the direction of the air-fuel mixture, and is forcibly mixed with the air-fuel mixture to form a flame F' with a small flame length. The combustion gas that has completed the combustion reaction undergoes heat exchange with the heat exchange drum and fins 10, and then is released into the outside air.

Problem to be Solved by the Invention However, in the above configuration, the stable flame F'1 formed by the flame stabilizing air port and the air supplied from the flame stabilizing air port
By connecting the flame F'2 formed by the air supplied from the inclined air lower, turbulence of the entire flame surface is suppressed and noise is reduced. The continuity between a part of the flame F' formed by the inclined air port at the top remote from the air port and the flame-holding flame F' becomes uncertain, which poses a problem in reducing noise.

The present invention solves such conventional problems, and aims to reduce noise while reducing the size of the combustion chamber.

Means for Solving Problems The present invention provides an inclined air plate section with inclined air ports arranged in a serrated zigzag pattern between an outer drum and an inner drum, and a flame-stabilized air plate section with horizontally arranged flame-stabilized air ports. A plurality of flame ports are disposed on the downstream side of the base drum formed by being connected to each other by an air plate portion, and where the fuel and air are mixed to form a premixture, and the burner port is provided with a means for ejecting the premixture in the longitudinal direction. and a mixture chamber member having a flame opening portion, and a flame holding flame opening portion of the mixture chamber member is provided in the center of the flame holding air plate portion so that the flame opening portion of the mixture chamber member is on substantially the same horizontal plane as the flame holding air plate portion. The projecting body is fitted and installed through a plate, the upper part of the flame holding flame plate is bent and held at a constant distance from the inclined air plate part, and the shape is protruded into a shape located inside the shape of the inclined air port. , an air chamber for sending air limited to a predetermined flow rate is provided below the flame-holding air port, and air is sent to the air port of the inclined air plate portion that crosses the air chamber and the air mixture and blows out the air. a chamber in the base drum;
A combustion chamber is constituted by the inclined air plate section, the flame holding flame plate section, the flame port section, and the heat exchange drum, and heat exchange fins are provided on the downstream side.

Effect of the present invention With the above-described configuration, the flame stabilizing air jetted from the flame stabilizing air port is blown out from around the flame stabilizing flame plate portion, thereby aligning a stable and reliable flame stabilizing flame to the inclined air port. By making the flame surface formed by the inclined air jetted from the inclined air port and the flame-holding flame surface continuous, it is possible to reduce turbulence of the entire flame surface.

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.

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, // is the outer drum //A and the inner drum l/
A base drum integrally constructed by connecting B with an inclined air plate part 17 with air holes/7a and a flame-holding air plate part with horizontally arranged air holes/J'a, /6 2 is a heat exchange drum constituting the combustion chamber 20, /2 is a mixture chamber/, 2B is a mixture chamber member bent into an L shape and having a flame port 72A on the upper end surface; 21 is a fin. shows.

The vertical part of the mixture chamber member 12 is tightly fitted into the inner drum //B with the flame opening part /2A at the top, with the flame stabilizing flame plate /9 interposed, and the flame mouth part /2A is filled with flame stabilizing air. An air chamber member /≠A is provided, located on substantially the same horizontal plane as the plate part /r, surrounding the lower part of the flame-stabilizing air plate part / to constitute an air chamber /4';
A flow rate control port /j is provided at the bottom of the air chamber member 1lAA, and the outer drum //A, the inclined air plate part /7, and the air chamber member /
≠ A and the mixture chamber member /2 constitute an air chamber /3, and the air ports /7a of the inclined air plate part /7 are not provided on the entire surface as shown in Fig. 2, but are provided in a sawtooth zigzag pattern. . The sloped part of the flame stabilizing flame plate/ri is arranged with a certain gap between it and the inclined air plate part/7, and the sloped part/rip A is a protrusion along the inside of the sawtooth shape of the air port. The overall structure is serrated.

The inclined air plate part /7 having the inclined air port /7a is provided so as to blow out the inclined air intersecting with the jetting direction of the air-fuel mixture jetted from the burner mouth part /2.

Furthermore, a flame holding flame plate/9 is provided to blow out air along the inclined air port/7a.

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

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

The premixture ejected from the flame part a/-2 is supplied to the combustion chamber 20. 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 the flow rate control port /j and enters the air chamber /lI-. The secondary air that entered the air chamber/lIL is
The air-fuel mixture is ejected almost parallel to the jetting direction of the air-fuel mixture from the flame-stabilizing air plate part/, which is approximately on the same plane as the flame opening part/2A, and fills the gap between the inclined air plate part/7 and the flame-stabilizing flame plate/li. The flame is ejected from around the flame-holding flame plate 1, forming a stable flame-holding flame F along the zigzag-shaped inclined air ports /7.

In addition, the remaining secondary air in the air chamber /3 is
7 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 F2 with a small flame length.

At this time, the flame F2 and the flame-holding flame F formed at its flame base are continuous along the zigzag-shaped inclined air port/7a, and flame turbulence is reduced.

The combustion gas that has completed the combustion reaction undergoes heat exchange in the heat exchange drum/2 and the fins 2/, and is then released to the outside air.

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

(],) Since the flame-holding flame plate is provided so as to align with the zigzag-shaped inclined air opening, the flame-holding flame formed at VgJu of the flame-holding flame plate is formed by the zigzag-shaped inclined air opening. Since it is reliably and stably continuous with the base of the flame, turbulence of the entire flame surface is suppressed, combustion noise is reduced, and noise reduction can be achieved.

(2) The flame surface formed by the inclined air has the inclined air ports arranged in a zigzag pattern, so the reaction surface becomes a large pleated flame, and the inclined air has an angle of intersection with the direction of the air-fuel mixture. Since it is ejected, the combustion reaction with the air-fuel mixture is promoted, the flame length can be shortened, and the combustion chamber can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the combustion apparatus of the present invention, and FIG.
1, FIG. 3 is a sectional view of a conventional combustion device, and FIG. 4 is an enlarged perspective view of a main portion of the combustion device shown in FIG. 3. //: Base drum, //A: Outer drum, //B: Inner drum, /2: Air mixture chamber, /2A: Flame port, /2
B: Mixture chamber, /3: Air chamber, /≠: Air chamber, /≠
A: Air chamber member, /ta: Dragon control port, /6: Combustion chamber, /7: Inclined air plate, /7a: Inclined air port, /r: Flame stabilizing air plate, /J'a: Preservation flame air vent,
/ri: flame-holding flame plate, /ri A: sloped part, 20: combustion air, 2/: heat exchange fin, Fl: flame-holding flame formed around the flame-holding flame plate, F2 two flames. Patent applicant: Patent attorney representing Matsushita Electric Industrial Co., Ltd.
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Claims (1)

[Claims] A base drum formed by connecting the outer drum and the inner drum with an inclined air plate section having inclined air ports arranged in a serrated zigzag pattern and a flame holding air plate section having flame holding air ports arranged horizontally. A mixture chamber member comprising a flame port portion disposed on the downstream side of mixing fuel and air to form a premixture, and provided with a plurality of flame ports having means for ejecting the premixture in the longitudinal direction. The flame port of the mixture chamber member is fitted to the center of the flame stabilizing air plate part through a flame stabilizing flame plate so that it is on substantially the same horizontal plane as the flame stabilizing air plate part. The upper part of the flame plate is bent and held at a constant distance from the inclined air plate part, and the shape is formed into a protruding body located inside the shape of the inclined air opening, and a predetermined flow rate is provided at the lower part of the flame stabilizing air opening. An air chamber is provided in the base drum for feeding restricted air, and an air chamber is configured in the base drum to feed air to an air port of the inclined air plate section that crosses the air-fuel mixture and blows out the air. A combustion device in which a combustion chamber is composed of an air plate section, a flame holding flame plate section, a flame port section, and a heat exchange drum, and a heat exchange fan is provided on the downstream side.