JPH04344009A - 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]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device that uses petroleum as fuel, and is used in domestic water heaters and space heaters.

0002

BACKGROUND OF THE INVENTION Various types of combustion devices of this type have been proposed in the past, and efforts are being made to put them into practical use or to put them into practical use.

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

0004

[Problems to be Solved by the Invention] However, in the above-described configuration, since the fuel is scattered from the end of the rotating body 1 almost by centrifugal force,
The liquid film of fuel that travels along the side surface of the wall forms an uneven thickness, and the particle size of the atomized fuel particles that are torn off from the edge becomes large and uneven, causing the fuel to be evaporated by the vaporizer 3 heated by the electric heater. Otherwise, there was a problem that mixing would be insufficient and combustion characteristics could not be improved. In addition, since electricity is used to heat the vaporizer 3 at the start of combustion and during combustion, electricity costs are incurred, and preheating is required for stable operation of the vaporizer 3, so instantaneous start-up of the equipment cannot be expected. There was a problem.

The present invention solves these conventional problems by atomizing and uniformizing the atomized particles.
It is an object of the present invention to provide a combustion device capable of instantaneous start-up with excellent combustion characteristics without using a vaporizer heated by an electric heater.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the combustion device of the present invention has a rotating body and an air control plate mounted on a rotating shaft, and a blow-off section provided at an end of the rotating body is configured to air. It is bent along the control plate and formed so as to surround its outer periphery, and a primary air passage is provided between this cut-off part and the air control plate, and a plurality of air passages are provided around this cut-off part via straight air passages. The combustion cylinder is provided with a combustion cylinder provided with a secondary air outlet, and a secondary air passage is provided outside the combustion cylinder.

[0007]

[Operation] With the above-described configuration, the present invention applies pressure to the liquid film spread on the inner wall surface of the rotor and the inner wall surface of the swing-off section by the air flowing inside the rotor and the primary air passage. It becomes thinner and more uniform and scatters from the end of the shake-off part, resulting in atomization of fine particles with uniform particle size, and
These microparticles are pushed forward by primary air and straight air, and secondary air is supplied from the combustion tube, so the microparticles of fuel and air are sufficiently mixed, good combustion occurs, and vaporization occurs. This makes it possible to obtain a combustion device that starts up instantaneously without requiring any equipment.

[0008]

[Embodiment] 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 as a smooth surface without irregularities. A support portion 8 is provided inside the rotating body 5 and 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 the rotary shaft 9 which penetrates approximately the center of the support portion 8 and is fixed thereto, and a rotary body 5 is provided at the lower end.
A drive section 11 composed of a motor or the like is provided to rotationally drive the components. Reference numeral 12 denotes a cylindrical swing-off portion that is provided by bending the upper end of the rotating body 5 and surrounding the outer periphery of the air control plate 10 . This swing-off part 1
2 and the air control plate 10, a primary air passage 13 is provided. Reference numeral 14 denotes a turbo fan mounted midway on the rotating shaft 9, and an air chamber 15 is provided around it. The air chamber 15 has an inlet 16 and an outlet 17 so that the rotating shaft 9 passes through it.
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. An air supply means 20 is provided by constructing the air chamber 15 and the front chamber 18 into an integral casing. Outlet 17 of air chamber 15
The air distribution chamber 21 communicates with the upper part of the air supply means 20.
It is provided in an integrated configuration. The upper part of the air distribution chamber 21 is covered with a partition plate 22. A cylindrical constriction part 23 through which the rotation shaft 9 passes is formed approximately in the center of the partition plate 22, and a part of the tip thereof is located below the rotation body 5. There is a small gap 2 in the rotating body 5 from
It is inserted through 4. 25 penetrates a part of the side wall of the air distribution chamber 21, passes through the inside of the constriction part 23, raises its tip from the lower part of the rotating body 5 along the rotating shaft 9, and then bends to connect to the inner wall surface of the rotating body 5. It is a fuel supply pipe facing nearby, and one end thereof communicates with a fuel supply means 26 constituted by a supply pump or the like. Reference numeral 27 denotes a straight air passage provided on the outer periphery of the cut-off portion 12, and a cylindrical combustion tube 28 is erected upward on the outside thereof. This combustion tube 28 is formed in a tapered shape that widens toward the upper end, and has a plurality of two
A secondary air outlet 29 is provided on the wall surface. The lower end of the combustion tube 28 is provided from below the cylindrical portion provided so as to surround the air control plate 10 in the swing-off portion 12 . Reference numeral 30 denotes a cylindrical external wall that is provided on the outside of the combustion cylinder 28 via a ceiling part 31 so as to surround the combustion cylinder 28. The external wall 30 is connected integrally with the casing of the air supply means 20. and the secondary air passage 32 in the combustion tube 28
It consists of 33 is the partition plate 22 of the air distribution chamber 21
These are a plurality of small exits provided on the outside of the constriction section 23 provided in the. 34 is an umbrella-shaped heat shield provided above the air control plate 10 with a gap 35 in between. Reference numeral 36 denotes a plurality of through holes provided in the air control plate 10 and communicating 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 drive unit 11 to be discharged from the air suction port of the front chamber 18. Air flows in through the surroundings. Air is supplied to outlet 1 by turbo fan 14 in air chamber 15.
7 into the air distribution chamber 21, a part of which is pushed out as primary air through the constriction part 23 into the rotating body 5.
The air rises along the inner wall surface of the support part 8, passes through a small passage in the support part 8, is bent by the air control plate 10, and advances through the air passage 13.
The air is ejected from between the outer periphery of the air control plate 10 and the swing-out portion 12, and the other one flows into the secondary air passage 32 from the small outlet 33.
Straight air is ejected from the straight air passage 27, and secondary air is ejected from the secondary air outlet 29 of the combustion tube 28. Further, 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 swing-off section 12, and is finely divided from the outer peripheral end. It is dispersed as fuel particles. The fuel particles are pushed upwards into the combustion tube 28 by the primary air and straight air;
The mixture is mixed with secondary air collided from the side, ignited by an ignition device (not shown), combustion begins, and the combustion progresses to stable combustion. In addition, a part of the primary air passes through the through hole 36 of the air control plate 10, escapes from the inside of the heat shield plate 34 into the gap 35, flows into the combustion tube 28, contributes to combustion, and also flows downward from the air control plate 10. Prevents temperature rise of component parts.

[0011] At this time, the liquid film of the fuel that has spread on the inner wall surface of the rotating body 5 and has spread to the shake-off section 12 is pushed and pressured by the air flow, so that the stagnation of the liquid film is eliminated and a uniform liquid film is formed. In addition, the movement of the liquid film is accelerated by being pushed by the air, so the liquid film is made thinner, and when it is scattered from the outer peripheral end of the shake-off section 12, it becomes finer. This has the advantage that uniform fuel particles can be obtained. In addition, the air control board 10 strengthens the liquid film of the fuel that is about to scatter.
The effect is that air pressure is applied in a substantially perpendicular direction, and that after the liquid film is thinned, it can be easily divided by the air jet force. In addition, since the small passage 6 is formed by the rotating body 5 and the support part 8, the pressure of the air flow can be easily applied to the liquid film of fuel moving along the inner wall surface of the rotating body 5, and the liquid film can be easily applied. This has the effect of making it thinner. In addition, a constriction portion 23 is provided on the partition plate 22 of the air distribution chamber 21.
is formed, and its tip is inserted into the rotating body 5, so that it is possible to easily ensure the amount of air in the rotating body 5 and adjust the flow velocity, and there is an effect that the accuracy of the particle size of the fuel particles can be improved. In addition, the primary air and straight air act to push the fuel particles scattered from the outer peripheral end of the swing-off section 12 upward into the combustion tube 28, preventing backflow of fuel particles and wetting of the wall of the combustion tube 28 by the fuel. This has the effect of preventing Since the secondary air collides with the fuel particles from a direction substantially perpendicular to the flow of primary air or straight air, mixing is promoted and combustion characteristics can be improved. Since the heat shield 34 is provided between the air control plate 10 and the gap 35, it acts to block the radiant heat of the combustion flame and also to block the heat conduction. This has the effect of preventing excessive temperature rises such as

0012

[Effects of the Invention] As explained above, according to the combustion apparatus of the present invention, the following effects can be obtained.

(1) Since the primary air passage is provided by the shake-off part and the air control plate, a thin liquid film is uniformly formed on the shake-off part due to the pressure of the air flow, and a finer liquid film is formed from the outer peripheral edge of the shake-off part. It can scatter fuel particles.

(2) Since the swing-off section was provided to surround the outer periphery of the air control plate, the air flow could be applied more strongly and almost perpendicularly to the fuel liquid film on the verge of scattering, making the liquid film thinner. This has the effect of making division easier later due to the air jet force.

(3) Since the straight air passage is provided, all the fuel particles are pushed out to the front of the combustion tube 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 tube,
The secondary air collides with the fuel particles pushed out by the primary air and the straight air in a direction substantially perpendicular to the fuel particles to promote mixing and improve combustion characteristics.

(5) Since the air control plate is provided with a heat shield through a gap, radiant heat and conductive heat from the combustion flame are prevented,
It is possible to prevent temperature rise of components connected to the air control board.

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

[Brief explanation of drawings]

[Fig. 1] A cross-sectional view of essential parts of a combustion device in an embodiment of the present invention.

[Figure 2] Cross-sectional view of main parts of a conventional combustion device

[Explanation of symbols]

5 Rotating body 8 Support part 9 Rotation axis 10 Air control board 11 Drive section 12 Swing-off section 13 Primary air passage 20 Air supply means 25 Fuel supply pipe 26 Fuel supply means 27 Straight air passage 28 Combustion tube 29 Secondary air outlet 30 External wall 32 Secondary air passage 34 Heat shield 35 Gap

Claims (1)

[Claims] 1. A rotary body having a hollow cylindrical shape and a tapered surface, a support part provided inside the rotary body and supporting the rotary body, and a rotary shaft passing through the support part and connected to the support part. , a disk-shaped air control plate provided at an end of the rotating shaft; a drive unit provided at the other end of the rotating shaft for driving the rotating body; a cylindrical swing-off portion bent along the control plate and provided so as to surround the outer periphery of the air control plate; a primary air passage constituted by the swing-off portion and the air control plate; and the rotating body. A fuel supply pipe inserted from one end of the rotating body to supply fuel to the inner wall of the rotating body, a fuel supply means for supplying fuel to the fuel supply pipe, and a straight air passage provided around the swing-off part. a cylindrical combustion tube, a secondary air passage provided by surrounding the combustion tube from the outside with an external wall, a plurality of secondary air jet ports provided in the combustion tube, and the air control plate. A combustion device comprising a heat shield provided through a gap, and an air supply means for feeding air to the primary air passage and the secondary air passage.