JP3019464B2 - 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 combustion device using petroleum as a fuel and is used for a domestic water heater or a heater.

[0002]

2. Description of the Related Art Conventionally, various types of such combustion devices have been proposed, and their practical use has been studied.

As shown in FIG. 2, fuel is supplied from a supply nozzle 2 to a high-speed rotating body 1 and scattered by centrifugal force, so as to collide with a vaporizer 3 heated by an electric heater. The vaporizer 3 evaporates the scattered fuel particles, mixes them with the primary air flowing into the vaporizer 3, sends the mixed air to the flame port 4, and burns the fuel.

[0004]

However, in the above-described structure, the fuel is scattered from the end of the rotating body 1 so as to be torn off almost only by centrifugal force.
The liquid film of the fuel transmitted on the side surface of the fuel cell forms an uneven thickness, the particle diameter of the atomized particles of the fuel torn off from the end becomes large and uneven, and the fuel is evaporated by the vaporizer 3 heated by the electric heater. Otherwise, there is a problem that the mixing becomes insufficient and the combustion characteristics cannot be improved. In addition, since electricity is used to heat the vaporizer 3 even at the start of combustion or at the time of combustion, an electric charge is required and stable operation of the vaporizer 3 requires preheating, so that instantaneous start-up of the equipment cannot be expected. Had the problem that

[0005] The present invention is to solve such a conventional problem, and by atomizing and uniformizing the atomized particles,
It is an object of the present invention to provide a combustion device which is excellent in combustion characteristics and can be instantaneously started without using a vaporizer heated by an electric heater.

[0006]

In order to solve the above-mentioned problems, a combustion apparatus according to the present invention has a rotating body and an air control plate mounted on a rotating shaft, and a swing-off section provided at an end portion of the rotating body is air-cooled. It is bent along the control plate and is formed so as to surround the outer periphery thereof. A primary air passage is provided by the swing-out portion and the air control plate, and a plurality of primary air passages are provided around the swing-off portion through a straight air passage. Is provided, and a secondary air passage is provided outside the combustion cylinder.

[0007]

According to the present invention, pressure is applied to the liquid film spread on the inner wall surface of the rotating body and the inner wall surface of the swing-off portion by the air flowing through the inside of the rotating body and the primary air passage by the above-described structure. It becomes thin and uniform and scatters from the end of the shake-off part, and atomization with a uniform particle size is obtained with fine particles,
These fine particles are pushed forward by the primary air and the straight air, and the secondary air is supplied from the combustion cylinder. Therefore, the fine particles of the fuel and the air are sufficiently mixed, and good combustion is performed, and vaporization is performed. The result is a combustion device that rises instantaneously without the need for a vessel.

[0008]

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

In FIG. 1, reference numeral 5 denotes a rotating body having a hollow cylindrical tapered surface extending upward, and its inner wall surface is formed of a smooth surface without irregularities. Inside the rotating body 5, there is provided a support portion 8 that supports the rotating body 5 by a plurality of small pieces 7 via an inner wall surface of the rotating body 5 and a small passage 6. A disk-shaped air control plate 10 is provided at the upper end of a rotating shaft 9 fixedly penetrating substantially through the center of the support portion 8, and a rotating body 5 is provided at the lower end.
A driving unit 11 configured by a motor or the like is provided to rotationally drive the motor. Numeral 12 is a tubular swing-out portion provided so as to bend the upper end of the rotating body 5 and surround the outer periphery thereof along the air control plate 10. This shaking off part 1
2 and the air control plate 10 provide a primary air passage 13. Reference numeral 14 denotes a turbo fan mounted in the middle of the rotating shaft 9, and an air chamber 15 is provided around the turbo fan. The air chamber 15 has an inlet 16 and an outlet 17 so that the rotating shaft 9 passes therethrough.
Is provided. A front chamber 18 is provided around the drive unit 11 provided outside the inlet 16 of the air chamber 15, and an air suction port 19 is provided in a part of the front chamber 18. The air chamber 15 and the front chamber 18 are constituted by an integral casing, and an air supply means 20 is provided. Outlet 17 of air chamber 15
The air distribution chamber 21 communicates with the upper part of the
And are provided in an integrated configuration. The upper part of the air distribution chamber 21 is covered with a partition plate 22. The partition plate 22 is formed with a cylindrical throttle portion 23 through which the rotating shaft 9 passes substantially at the center. From the rotating body 5 through a small gap 24. Reference numeral 25 denotes a part of the side wall of the air diverting chamber 21, which passes through the constricted portion 23, and the tip of which is raised along the rotating shaft 9 from the lower part of the rotating body 5 and then bent, thereby bending the inner wall surface of the rotating body 5. One end of the fuel supply pipe facing the vicinity is communicated with a fuel supply means 26 composed of a supply pump or the like. Reference numeral 27 denotes a straight-moving air passage provided on the outer periphery of the swing-off section 12, and a cylindrical combustion tube 28 is provided upright on the outside thereof. This combustion cylinder 28
Is formed in a tapered shape expanding toward the upper end, and a plurality of secondary air outlets 29 are provided on the wall surface. The lower end of the combustion tube 28 is provided from below a cylindrical portion provided to surround the air control plate 10 in the swing-off section 12. Numeral 30 denotes a cylindrical external wall provided outside the combustion cylinder 28 so as to surround the combustion cylinder 28 via a ceiling 31 and is provided integrally with the casing of the air supply means 20. And the combustion cylinder 28 and the secondary air passage 3
2. 33 is a partition plate 2 of the air distribution chamber 21
2 are a plurality of small outlets provided outside the throttle unit 23 provided in the second unit 2. A gap 35 is provided above the air control plate 10.
Is an umbrella-shaped heat shield provided through the base. Reference numeral 36 denotes a plurality of through holes provided in the air control plate 10 and communicated with the primary air passage 13.

In the above configuration, when the drive unit 11 is operated, the rotating body 5 mounted on the rotating shaft 9 and the turbo fan 14 rotate, and the suction of the turbo fan 14 causes the air suction port of the front chamber 18 to move the drive unit 11 from the air suction port. Air flows in through the surroundings. The air is supplied to the outlet 1 by the turbo fan 14 in the air chamber 15.
7 into the air diverting chamber 21, a part of which is extruded as primary air through the throttle 23 into the rotating body 5,
Rises along the inner wall surface of the vehicle, passes through the small passage of the support portion 8, is bent by the air control plate 10, and travels along the air passage 13.
The air is ejected from the outer periphery of the air control plate 10 and between the swing-off portion 12, and the other flows into the secondary air passage 32 from the small outlet 33,
The air is ejected from the straight air passage 27 as straight air and from the secondary air outlet 29 of the combustion cylinder 28 as secondary air.
Further, the fuel sent from the fuel supply means 26 is supplied to the inner wall surface of the rotating body 5 from the tip of the fuel supply pipe 25. The fuel rises along the inner wall surface of the rotating body 5 due to the centrifugal force of the tapered rotating body 5, spreads toward the cylindrical outer peripheral end of the bent shake-off portion 12, and is finely divided from the outer peripheral end. As fuel particles. The fuel particles are pushed out above the combustion cylinder 28 by the primary air and the straight air, mixed with the secondary air collided from the lateral direction, ignited by an ignition device (not shown), and the combustion is started and stabilized. Shift to combustion. In addition, a part of the primary air passes through the through hole 36 of the air control plate 10 and from the heat shield plate 34 to the gap 3.
5 to flow into the combustion cylinder 28 to contribute to combustion, and to prevent a temperature rise of components below the air control plate 10.

At this time, the liquid film of the fuel, which is transmitted along the inner wall surface of the rotating body 5 and spreads to the swing-off portion 12, is pressed by the flow of air and pressure is applied, so that stagnation of the liquid film is eliminated and a uniform liquid film is formed. Since the liquid film is moved by being pressed by the air, the liquid film moves faster, and the liquid film is made to be thinner. Thus, there is an effect that uniform fuel particles can be obtained. In addition, the air control plate 10 is stronger against the liquid film of the fuel just before being scattered,
It is operated so that the pressure of air in a substantially perpendicular direction can be applied, and there is an effect that the division can be easily performed by the jetting power of the air after the liquid film is thinned. Also, the rotating body 5 and the supporting portion 8
Since the small passage 6 is formed in this way, it is possible to act so that the pressure of the air flow can be easily applied to the liquid film of the fuel moving along the inner wall surface of the rotating body 5, and there is an effect that the liquid film can be made thinner. In addition, the diaphragm 2 is provided on the partition plate 22 of the air distribution chamber 21.
Since the tip 3 is formed and its tip is inserted into the rotating body 5, there is an effect that the amount of air in the rotating body 5 can be secured and the flow velocity can be easily adjusted, and the accuracy of the particle diameter of the fuel particles can be improved. In addition, the primary air and the straight air act to push out the fuel particles scattered from the outer peripheral end of the swing-off portion 12 upward in the combustion tube 28, so that the fuel particles flow backward and the fuel is wetted on the wall of the combustion tube 28. This has the effect that it can be prevented. Since the secondary air collides with the flow of the fuel particles and the primary air and the straight air from a direction substantially perpendicular to the flow, the mixing is promoted and the combustion characteristics can be improved.
Since the heat shield 34 is provided between the air control plate 10 and the gap 35, the heat shield 34 acts to block the radiant heat of the combustion flame and also to cut off the heat conduction, and the fuel supply pipe 25 provided below the air control plate 10. This has the effect of preventing an excessive rise in temperature.

[0012]

According to the combustion apparatus of the present invention as described above, the following effects can be obtained.

(1) Since the primary air passage is provided by the swing-out portion and the air control plate, the liquid film is formed uniformly and thinly on the shake-off portion by the pressure of the air flow, and a finer liquid film is formed from the outer peripheral end of the shake-off portion. Fuel particles can be scattered.

(2) Since the swing-out portion is provided so as to surround the outer periphery of the air control plate, the air flow can be applied to the fuel liquid film immediately before the scattering, in a direction almost perpendicular to the fuel liquid film, and the liquid film can be made thinner. There is an effect that division can be easily performed later by the jetting power of air.

(3) Since the straight air passage is provided, all the fuel particles are pushed forward of the combustion cylinder by the straight air.
Combustion characteristics can be improved by preventing backflow and wetting.

(4) Since a secondary air port is provided in the combustion cylinder,
The secondary air collides with the fuel particles extruded into the primary air and the straight air in a direction substantially perpendicular to the air to promote mixing and improve combustion characteristics.

(5) Since a heat shield is provided on the air control plate via a gap, radiant heat and conductive heat from the combustion flame are prevented.
The temperature rise of the components connected to the air control plate can be prevented.

(6) Since good combustion is performed instantaneously by obtaining fine fuel particles, a combustion device that does not use a vaporizer heated by an electric heater can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a conventional combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 5 Rotating body 8 Support part 9 Rotating shaft 10 Air control plate 11 Drive part 12 Shaking off part 13 Primary air passage 20 Air supply means 25 Fuel supply pipe 26 Fuel supply means 27 Straight air passage 28 Combustion cylinder 29 Secondary air ejection port 30 Outer wall 32 Secondary air passage 34 Heat shield 35 Gap

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI F23D 11/04 621 F23D 11/04 621G 622 622B (72) Inventor Chitonori Aso 1006 Kadoma, Kazuma, Kadoma, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-344008 (JP, A) JP-A-1-81430 (JP, U) JP-A-62-118915 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) F23D 11/04-11/08

Claims (1)

(57) [Claims] 1. A rotating body having a hollow cylindrical shape and a tapered surface, a supporting portion provided inside the rotating body and supporting the rotating body, and a rotating shaft penetrating the supporting portion and connected to the supporting portion. A disk-shaped air control plate provided at an end of the rotating shaft; a driving unit provided at the other end of the rotating shaft for driving the rotating body; A cylindrical swing-off portion provided to bend along the control plate and surround the outer periphery of the air control plate; a primary air passage formed by the shake-off portion and the air control plate; A fuel supply pipe inserted from one end of the rotating body to supply fuel to the inner wall of the rotating body; fuel supply means for supplying fuel to the fuel supply pipe; and a fuel supply pipe provided around the swing-off section through a straight air passage. Cylindrical combustion cylinder, and this combustion cylinder is surrounded by an external wall from outside. A secondary air passage provided, a plurality of secondary air outlets provided in the combustion cylinder, a heat shield provided in the air control plate with a gap therebetween, the primary air passage and the secondary A combustion device comprising air supply means for sending air to an air passage.