JPH07103968B2 - Combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is designed to premix a fuel gas obtained by gasifying petroleum or a gaseous fuel such as gas and combustion air, and eject the fuel from a burner head to burn it. Combustion device.

(B) Conventional technology As disclosed in Japanese Utility Model Laid-Open No. 59-181922, a conventional combustion device of this type premixes vaporized gas of fuel and primary air for combustion, and ejects this from a burner head for combustion. It is well known that secondary air is supplied to the combustion flame along the burner body to promote combustion.

(C) Problems to be Solved by the Invention However, in the combustion device of this type of conventional configuration, carbon monoxide is exhausted indoors due to incomplete combustion unless the exhaust device exhausts the exhaust gas to the outside of the room. Or, even if it has an exhaust system, when the exhaust system is blocked by dust, water, etc., the exhaust gas flows back into the room, the fuel greatly increases, or the primary / secondary air becomes insufficient. There was a danger that carbon monoxide would be rapidly discharged into the room. further,
In the case where a glass tube made of heat-resistant transparent glass is connected to the upper part of the combustion tube plate with the interior as the combustion chamber, and the tip of the burner body faces the lower part inside the combustion tube plate, the combustion tube is burned with hot air. There is a drawback that the plate becomes high in temperature and component parts such as a blower installed near the outside of the combustion cylinder plate are heated by the radiant heat of the combustion cylinder plate.

The present invention has been made in view of the above-mentioned facts, while suppressing the generation of carbon monoxide and realizing clean combustion,
The purpose of the present invention is to prevent the temperature of the combustion tube plate from becoming as high as possible, to suppress the temperature rise of the parts installed near the outside of the combustion tube plate, and to improve the durability of the glass combustion tube.

(D) Means for Solving the Problems In the present invention, a burner main body having a burner head mounted on the upper portion thereof and an annular secondary air supply chamber provided on the outer periphery of the burner main body are provided between the burner main body and the burner main body. A burner case to be formed, a combustion tube plate connected to the burner case and having a combustion chamber inside, a glass combustion tube continuously provided on the combustion tube plate, and a combustion tube plate provided inside the combustion tube plate. , A tertiary air straightening plate that forms an annular tertiary air supply chamber in the combustion cylinder, primary air in the burner body, secondary air in the secondary air supply chamber, and tertiary air in the tertiary air supply chamber A blower, the tertiary air straightening plate, a tertiary air hole for ejecting the tertiary air of the tertiary air supply chamber toward the combustion flame formed in the burner head, and the tertiary air of the tertiary air supply chamber is a glass combustion cylinder Cooling to be ejected along the inner surface of the And a hole is provided.

(E) Action With this configuration, the primary air is supplied into the burner body, and the secondary air flows from the secondary air supply chamber along the burner body and is supplied to the combustion flame. By supplying air and secondary air, a normal combustion state can be maintained, and since the combustion flame is further supplied with tertiary air, the supply of this tertiary air can promote complete combustion,
Generation of carbon monoxide is suppressed over a wide range from weak combustion to strong combustion.

In addition, a cylindrical tertiary air straightening plate is provided inside the combustion cylinder plate,
Since an annular tertiary air supply chamber to which the tertiary air is supplied from the blower is formed between the tertiary air straightening plate and the combustion cylinder plate, the combustion cylinder is formed by the air flowing through the tertiary air straightening plate and the tertiary air supply chamber. It is possible to suppress the temperature rise of the plate and prevent the components arranged near the outside of the combustion cylinder plate from being adversely affected by heat.

In addition to the tertiary air holes for ejecting the tertiary air from the tertiary air supply chamber toward the combustion flame, the tertiary air straightening plate also ejects the tertiary air from the tertiary air supply chamber along the inner peripheral surface of the glass combustion tube. Since the cooling holes are provided for cooling the glass combustion cylinder with the air flow ejected from the cooling holes, not only the durability of the glass combustion cylinder is improved, but also the water vapor generated by the combustion at the start of combustion is removed from the glass combustion cylinder. It is possible to prevent the soot from adhering to the inner surface of the glass as much as possible, and to prevent the soot from adhering to the glass combustion cylinder when soot is generated.

(F) Example Hereinafter, one example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a main part of a combustion apparatus according to the present invention, in which (1) is a structure for supporting a burner body (7) with an air supply case for introducing primary air for combustion and secondary air for combustion promotion. Has become.
(2) is a burner motor, which is provided with a rotary shaft (3), and a cone-shaped cone (4) for atomizing liquid fuel, a rotary plate (5) and a mixing plate (6) to vaporize fuel and primary air. It is located in a premixing chamber (8) for premixing. A burner plate (9) for equalizing the air-fuel mixture and a burner head (11) having a slit-shaped flame port (10) installed so as to fix the straightener plate (9) are respectively provided in the burner body (7). ) Is fixed at the top. Further, the burner body (7) has a built-in heater (12) for vaporizing liquid fuel during ignition and a burner thermistor (13) for detecting the temperature of the burner body (7).

(14) is a combustion flame (3) that forms secondary air on the flame mouth (10).
6) is formed between the combustion cylinder end plate (15) and the burner body (7) in the annular secondary air supply chamber for supplying the heat insulation material (16). Is provided above the air supply case (1) via the burner body (7) in the center.
It has. At the bottom of the secondary air supply chamber (14), a plurality of through holes (through which the air supply case (1), the heat insulating material (16) and the combustion cylinder end plate (15) penetrate to take in the secondary air ( 1
7) are provided at equal intervals, and the secondary air is transferred from the secondary air holes (18) formed by the burner body (7) and the tubular-shaped tertiary air straightening plate (23) to the burner body (7). Is supplied to the combustion flame (36) for promoting combustion.

Reference numeral (19) is a combustion cylinder plate, the base of which is bent toward the burner head (11), and the outer peripheral end portion of the tertiary air straightening plate (23) is inside the combustion cylinder plate (19). On the peripheral surface, the inner peripheral end portion of the tertiary air rectifying plate (23) is connected to the tip of the bent portion of the combustion cylinder plate (19), and the combustion cylinder plate (19) is provided with a sealing material (20). Support (19
A) A glass combustion cylinder (2 with a heat-resistant transparent glass cylinder on top)
1) is placed and fixed. A combustion cylinder (22) is formed by the glass combustion cylinder (21), the combustion cylinder plate (19) and the combustion cylinder end plate (15), and the inside of the combustion cylinder plate (19) serves as a combustion chamber (X). Then, the tertiary air straightening plate (23) and the combustion cylinder plate (1
The annular space formed by 9) and 9) is located in the tertiary air supply chamber (24) so as to surround the combustion chamber (X) and supplies tertiary air for promoting complete combustion from the outside of the combustion flame (36). The surface (23C) of the tertiary air straightening plate (24) facing the combustion flame (36) is inclined downwardly at a depression angle of about 80 ° like a mortar,
The surface (23C) is located slightly above the tip of the burner body (7) with a predetermined interval and a plurality of tertiary air holes (23A).
Are opened at equal intervals, and the tertiary air is supplied to the combustion flame (36) through the tertiary air holes (23A). Part of the tertiary air is supplied to the surface (23D) bent in the direction of the combustion cylinder plate (19) above the tertiary air straightening plate (23) so as to rise along the glass combustion cylinder (21). Cooling hole (23B)
Are opened at regular intervals. (25) is an air supply duct for supplying primary and secondary air to the fixed plate (26), and a blower pipe (27) for supplying tertiary air is fixed to the lower side surface of the combustion tube plate (19). . (28) is a spark plug that faces the flame port (10) and ignites the air-fuel mixture, and (29) is a combustion flame (3
Frame rods as a flame detection device facing 6), which are attached to the lower side surface of the combustion tube plate (19). (3
Reference numeral 0) is a ventilation pipe that is attached through the combustion cylinder end plate (15) and is bent downward to face the thermo attachment plate (31). The thermo-mounting plate (31) is attached to the air supply case (1), and a lower surface is provided with a thermostat (32) for detecting the temperature of the exhaust gas and stopping the combustion. (33) is an oil feeding pipe for supplying liquid fuel, which faces the conical cone (4).

FIG. 3 is a vertical cross-sectional view of a schematic configuration of the entire combustion apparatus of the present invention.
(34) is an air supply duct (25) for introducing air from outside the combustion device
And a blower for air supply that supplies the blower pipe (27). Also,
(35) is an exhaust device, and the exhaust gas generated by combustion is exhausted to the outside of the room through the exhaust device (35).

The operation will be described below with the above configuration. First, when the heater (12) is energized, the burner body (7) is heated, and when the burner thermistor (13) detects that the burner body (7) has reached the vaporization temperature of the liquid fuel, an air supply blower ( 34) supplies primary / secondary / tertiary air through the air supply duct (25) and the blower pipe (27). Next, the burner motor (2) is driven to rotate the conical cone (4), the rotary plate (5) and the mixing plate (6) at high speed, and at the same time, the liquid fuel is fed from the oil feed pipe (33) to the conical cone (4). 4) Supplied to the surface. The liquid fuel supplied to the conical cone (4) is supplied to the rotary plate (5).
Are scattered into fine particles by the centrifugal force, and are instantly vaporized on the inner surface of the heated burner body (7) to become vaporized fuel in the premixing chamber (8). On the other hand, primary air for combustion is sent into the premixing chamber (8), the vaporized fuel is premixed with the primary air, and is uniformly dispersed through the flow straightening plate (9) to burner head ( Combustion flame (36) ignited by the spark plug (28) from the 11)
Form and burn. Secondary air, which is a part of the air in the air supply case (1), flows into the secondary air supply chamber (14) through the plurality of through holes (17), and the secondary air holes (18). Is supplied to the combustion flame (36) through the burner body (7) to promote combustion. When the burner body (7) is heated by the combustion flame (36), the energization of the heater (12) is stopped.

On the other hand, the tertiary air for promoting complete combustion supplied from the blower pipe (27) is guided to the tertiary air supply chamber (24) and passes through the plurality of tertiary air holes (23A) from the side of the combustion flame (36). Since the complete combustion is promoted because of being supplied, the generation of carbon monoxide can be suppressed even when the exhaust device (35) is blocked, when the fuel is increased, and when primary, secondary, and tertiary air is insufficient. In addition, a part of the tertiary air is cooled along the glass combustion tube (21) by the cooling hole (23
Since it is supplied so as to rise from B), it has a function of cooling the glass combustion cylinder (21) and at the same time creates a flow of air in the tertiary air supply chamber (24) to prevent the radiation heat from the combustion chamber (X). Remarkably reduce radiation.

Although the liquid fuel combustion device with the exhaust device (35) has been described as an embodiment of the present invention, the invention is not limited to this, and the gaseous fuel combustion device with the exhaust device (35) and the combustion device for supplying combustion gas indoors. It can be applied to all combustion devices such as.

(G) Effect of the Invention Since the combustion device of the present invention is configured as described above,
It has the following effects.

While the primary air is supplied into the burner body, the secondary air is supplied from the secondary air supply chamber to the combustion flame, and the combustion flame is further supplied with the tertiary air from the tertiary air supply chamber. By supplying air and tertiary air, complete combustion can be promoted and the generation of carbon monoxide can be suppressed over a wide range from weak combustion to strong combustion.

A cylindrical tertiary air rectifying plate is provided inside the combustion cylinder plate, and between the tertiary air rectifying plate and the combustion cylinder plate, an annular tertiary air supply chamber to which tertiary air is supplied from the blower is formed.
The temperature rise of the combustion cylinder plate is suppressed by the air flowing through the tertiary air straightening plate and the tertiary air supply chamber, and it is possible to prevent the components arranged in the vicinity of the outside of the combustion cylinder plate from being adversely affected by heat, and to ensure those components. Can be protected.

In the tertiary air straightening plate, in addition to the tertiary air holes that eject the tertiary air in the tertiary air supply chamber toward the combustion flame, the cooling that ejects the tertiary air in the tertiary air supply chamber along the inner peripheral surface of the glass combustion cylinder Since the holes are provided, it is possible to cool the air flow ejecting the glass combustion cylinder from the cooling holes, not only improving the durability of the glass combustion cylinder, but also the water vapor generated by combustion at the start of combustion to the inner surface of the glass combustion cylinder. Good radiant heating can be always performed, for example, by preventing the adhesion of soot as much as possible and by preventing soot from adhering to the glass combustion cylinder when soot is generated.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of the main part of the present invention, FIG. 2 is a cross-sectional plan view of the main part of the combustion device of the present invention, and FIG. 3 is a schematic configuration vertical cross-sectional view of the entire combustion device of the present invention. (7) ...... Burner body (burner body), (11) ...... Burner head, (14) ...... Secondary air supply chamber, (15) ...... Combustion cylinder end plate (burner case), (19) ...... Combustion tube plate, (2
1) …… Glass combustion tube, (23) …… Tertiary air straightening plate, (2
3A) …… tertiary air vent, (23B) …… cooling vent, (34) ……
Blower for air supply (Blower), (36) ... Combustion flame, (X) ...
… Combustion chamber.

Continued Front Page (72) Inventor Akihiko Kogure 180 Sakata, Oizumi-cho, Ora-gun, Gunma Toyo Sanyo Electric Co., Ltd. (56) References 59-181922 (JP, U) (JP, U)

Claims (1)

[Claims] 1. A burner body having a burner head mounted on an upper portion thereof, a burner case which is provided on the outer periphery of the burner body and forms an annular secondary air supply chamber between the burner body, and the burner case. A combustion cylinder plate that is connected to the above and has the interior as a combustion chamber, a glass combustion cylinder that is continuously installed on this combustion cylinder plate, and an annular tertiary air supply provided inside the combustion cylinder plate and inside the combustion cylinder. A tertiary air straightening plate that forms a chamber, a primary air in the burner body, a secondary air to the secondary air supply chamber, a blower that supplies the tertiary air to the tertiary air supply chamber, respectively, the tertiary air straightening plate Includes a tertiary air hole for ejecting the tertiary air in the tertiary air supply chamber toward the combustion flame formed in the burner head, and a cooling for ejecting the tertiary air in the tertiary air supply chamber along the inner peripheral surface of the glass combustion cylinder. Is characterized by the provision of holes and That the combustion device.