JPH025266Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to an improvement of a vertical combustion device that heats liquid fuel such as kerosene using combustion heat, vaporizes it, and burns it.

In a conventional liquid fuel combustion device of this type (hereinafter simply referred to as a "vaporization burner"), outside air taken in by a blower located below is passed through a blow tube into a bell-shaped vaporization cylinder having a scattering ring at the bottom end. The vaporizing tube is attached to the tip of the rotary drive shaft of the blower and rotated synchronously, and liquid fuel (hereinafter simply referred to as "fuel") is fed into the vaporizing tube from the fuel pipe. The atomized fuel is atomized by the centrifugal force caused by the high-speed rotation of the vaporizer cylinder, and is sprayed into the combustion cylinder through the gap formed between it and the scattering ring, where the atomized fuel adheres to the peripheral wall of the combustion disk and is simultaneously ignited by the arc discharge of the igniter. The combustion heat from this primary combustion is used to heat the vaporization cylinder to vaporize the fuel in the vaporization cylinder, and this vaporized gas is formed between the combustion cylinder and the combustion disk. There is known a structure in which secondary combustion is carried out by introducing the gas into the combustion chamber and injecting it into the combustion cylinder from an injection port opened in the peripheral wall surface of the combustion disk.

However, in a vaporizing burner with such a conventional structure, during the initial stage of live combustion during primary combustion, a part of the atomized fuel sprayed from the gap between the vaporizing cylinder and the scattering ring hits the peripheral wall surface of the combustion disk. There is a risk that the gas may flow down to the inner bottom wall of the combustion plate and burn there, or it may not burn and accumulate on the inner bottom wall of the combustion disk, so heating of the vaporization cylinder by the primary combustion flame is This has led to problems such as the inability to sufficiently promote the vaporization of the fuel.

This idea was aimed at solving the above-mentioned conventional drawbacks, and its gist was to supply primary air, which is forcibly blown from a blower through a blower tube, into a rotatably driven vaporizer tube. The liquid fuel is sprayed from the scattering hole formed at the bottom of the vaporization cylinder toward the inner peripheral wall surface of the combustion disk disposed between the vaporization cylinder and the combustion cylinder, and the igniter fires the liquid fuel by the discharge ignition action of the igniter. Primary combustion is performed, and the combustion heat from this primary combustion heats the vaporization cylinder to vaporize the liquid fuel, and the vaporized gas is passed between the inner circumference of the combustion cylinder and the outer circumference of the combustion disk. In a combustion device, the gas is introduced into a formed gas chamber and is ejected from a jet port opened on a peripheral wall surface of the combustion disk to perform secondary combustion within the combustion cylinder, wherein the outer periphery of the vaporization cylinder and the combustion An upright piece is formed at an intermediate position between the inner periphery of the disk and faces the periphery of the scattering gap of the vaporizing cylinder, rising from the inner bottom wall side of the combustion disk, and a notch is formed in the upright piece. In addition, the electrode discharge portion of the igniter is exposed to this notch.

Next, this invention will be explained in detail based on illustrated embodiments.

As shown in FIGS. 1 and 2, reference numeral 1 in the drawings indicates a blower that sucks outside air through a bottom opening and forcibly blows the air upward. A drive motor 4 for rotating a fan 3 is built into the guide tube 2 of the blower 1, and a rotary drive shaft 5 is provided in the drive motor 4 for synchronous rotation. The portion 5a is inserted into the bottomed combustion cylinder 6.
A combustion disk 7 with a bottom is provided in the combustion tube 6, and a large number of jet ports 8 are opened in the peripheral wall surface 7a of the combustion disk 7, and the outer peripheral wall surface of the combustion disk 7 and the combustion chamber 7 are connected to each other. A gas chamber 9 is surrounded and formed between the cylinder 6 and the inner circumferential wall surface thereof.

Reference numeral 10 in the figure denotes a blower tube that passes through the gas chamber 9 and faces into the combustion tube 6, and is fixed so as to communicate with the blower path from the blower 1, and its outer circumferential side is covered from above. A bell-shaped vaporizing cylinder 11 is arranged so as to crown the cylinder.

The vaporization cylinder 11 is connected to the tip 5 of the rotational drive shaft 5.
A is fixedly attached to a fuel diffusion ring 12 and driven to rotate, and a fuel diffusion ring 12 facing the upper end opening of the blower tube 10 is provided inside the ring, and a minute gap a is formed at the mounting base of the ring. , an appropriate scattering gap b is formed on the lower end circumferential surface by spot welding.
A scattering ring 13 is provided which forms a .

Inside the fuel diffusion ring 12 of the vaporization tube 11 is a nozzle portion 14 of a fuel pipe 14 that supplies liquid fuel.
The centrifugal force caused by the high-speed rotation of the vaporizer cylinder 11 and the outside air forced from the blower cylinder 13 cause the liquid fuel to flow through the gap a into the vaporizer cylinder 11, as shown by the solid arrow in FIG. The liquid fuel F is ejected toward the circumferential side, and is further sprayed in an atomized state toward the circumferential wall surface 7a of the combustion disk 7 in the combustion tube 6 through the scattering gap b in the lower part thereof.

Further, reference numeral 15 in the figure is an upright piece formed upright on the inner bottom wall surface 7b of the combustion disk 7 in an upright state or in a state inclined toward the combustion disk 7 side. This upright piece 15 is located close to the middle between the circumferential wall surface 7a of the combustion disk 7 and the circumferential side surface 11a of the vaporization tube 11, and faces the periphery of the scattering gap b of the vaporization tube 11. A notch 21 is formed at the upper end.

The notch 21 is provided with the vaporizer cylinder 11.
An electrode discharge section 16a of the igniter 16, which is composed of two electrodes or one electrode rod, is arranged to ignite and burn the atomized fuel F sprayed from the igniter 16 by a discharge action, and an arc discharge is caused between them.

According to the above-mentioned configuration according to this invention, at the start of combustion, the atomized fuel F flows from the scattering gap b between the vaporization tube 11 and the scattering ring 13, which are rotated by the rotational drive of the drive motor 4, to the combustion plate. When attempting to spray toward the peripheral wall surface 7a of the combustion disk 7 and the vaporization tube 11, a part of the atomized fuel F also adheres to the upright piece 15 formed at an intermediate position between the combustion disk 7 and the vaporization tube 11, and Combustion is also carried out at a position close to the combustion area, which allows for an expansion of the combustion area, which allows for rapid and stable ignition of the atomized fuel in the primary combustion stage. It becomes possible to do it.

In addition, the upright piece 15 at a position close to the vaporizer cylinder 11
By burning in the vicinity of , it becomes possible to accelerate the heating of the vaporization cylinder and promote the vaporization action.

Furthermore, a notch 21 formed in the upright piece 15
Since the electrode discharge part 16a of the igniter 16 faces the igniter 16, the atomized fuel F adhering to the vicinity of the upright piece 15 can be ignited and burned by arc discharge from the electrode discharge part 16a of the igniter 16 quickly and reliably. .

As explained above, this idea is based on the fact that the evaporative burner is equipped with a
Since an upright piece is formed rising from the inner bottom wall side of the combustion disk and faces the periphery of the scattering gap of the vaporization tube, part of the atomized fuel sprayed from the vaporization tube is placed on the upright piece. Since the parts adhere to each other and the combustion area can be expanded, the combustion reaction can be carried out efficiently, thereby speeding up the heating of the vaporization cylinder and promoting the vaporization action. At the same time, the amount of unburned fuel remaining on the inner bottom wall surface of the combustion disk can be reduced.

In addition, since a notch is formed in the upright piece and the electrode discharge part of the igniter is exposed to this notch, arc discharge of the electrode discharge part of the igniter to the atomized fuel adhering to the vicinity of the upright piece can cause Ignition can be performed quickly and reliably, and as a result, the atomized fuel can be quickly ignited and burned in a stable primary combustion stage, and the igniter can be easily ignited due to the generation of soot. It is possible to reliably eliminate poor discharge and deterioration of combustion function.

[Brief explanation of drawings]

FIG. 1 is a cutaway sectional view of a main part showing an embodiment of a liquid fuel combustion device according to this invention, and FIG. 2 is an enlarged sectional perspective view of a main part in section A of FIG. 1... Blower, 2... Guide cylinder, 3... Fan,
4... Drive motor, 5... Rotation drive shaft, 6... Combustion cylinder, 7... Combustion disk, 7a... Circumferential wall surface, 7b...
...Inner bottom wall surface, 8...Ejection port, 9...Gas chamber, 10
... Blow tube, 11 ... Vaporization tube, 12 ... Fuel diffusion ring, 13 ... Scattering ring, 14 ... Fuel pipe, 14a ... Nozzle part, 15 ... Upright piece, 16
...Igniter, 16a... Electrode discharge section, 21...
...Notch, a... between, b... scattering, F...
Atomized fuel.

Claims (1)

[Scope of Claim for Utility Model Registration] Liquid fuel is supplied into a rotatably driven vaporizing cylinder together with primary air forcedly blown from a blower through a blowing cylinder, and the liquid fuel is vaporized from a scattering gap formed at the bottom of the vaporizing cylinder. While spraying toward the inner peripheral wall surface of the combustion disk disposed between the tube and the combustion tube, primary combustion is performed by the discharge ignition action of the igniter, and the combustion heat from this primary combustion causes the vaporization. The tube is heated to vaporize the liquid fuel, and the vaporized gas is introduced into a gas chamber formed between the inner periphery of the combustion tube and the outer periphery of the combustion disk, which opens on the peripheral wall surface of the combustion disk. In a combustion device in which secondary combustion is performed within the combustion tube by ejecting the gas from the jet port, a space between the scattering of the vaporization tube is located at an intermediate position between the outer circumference of the vaporization tube and the inner circumference of the combustion disk. an upright piece facing the periphery of the combustion disk is formed rising from the inner bottom wall side of the combustion disk, and a notch is formed in the upright piece, and the electrode discharge part of the igniter is made to face the notch. A liquid fuel combustion device featuring: