JPS6137934Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion device, and particularly to the structure of a burner thereof.

FIG. 1 shows the burner structure of a conventional liquid combustion device. A vaporizer 2 is disposed inside a burner housing 1, and a sheathed heater 3
is buried. A burner plate 5 is placed on the vaporization chamber 4 inside the vaporizer 2, and a secondary air passage 6 is formed between the housing 1 and the vaporizer 2.

In this way, in the conventional burner structure, since the burner plate 5 is located at the top, the heat from the flame on the burner plate 5 is not much used for vaporizing the liquid fuel. Further, since the upper part of the vaporization chamber 4 where the burner plate 5 is placed is open, vaporization of the liquid fuel is not effective. Furthermore, there was a problem in that the burner plate 5 had to have a very complicated shape in order to premix the vaporized fuel and the primary air.

Therefore, the purpose of this invention is to fully utilize the heat from the flame on the burner plate for vaporizing liquid fuel.
Another object of the present invention is to provide a burner structure for a liquid fuel device that can perform vaporization effectively and, when performing premixing, without complicating the burner plate.

In order to achieve this object, the burner structure of the liquid fuel device of the present invention includes a vaporizer that is equipped with a heating means and has a bottom section and a pair of side sections extending in one direction from both ends of the vaporizer; a vaporization chamber main body having a base that faces the bottom of the vaporizer and forms a vaporization chamber therebetween; and a heat absorption protrusion that projects from the base in a direction opposite to the direction of the bottom of the vaporizer; The combustion heat from the burner plate, including the burner plate installed below the tip of the heat protrusion and adjacent to the protrusion, is collected at the tip of the heat absorption protrusion, and this heat is vaporized. It is used for vaporizing liquid fuel in a vaporizing chamber surrounded by a container and the vaporizing chamber main body.

Embodiments of the present invention will be described below based on the drawings.

In FIG. 2, the carburetor 10 has a bottom wall 10a and a pair of side walls 1 extending substantially upward from both ends of the bottom wall 10a at right angles.
0b and 10c, and a sheathed heater 11 is embedded in this bottom wall 10a. An outer plate 12 is fixed to the outer periphery of the carburetor 10 so as to surround the upper part of the carburetor 10. Further, a vaporization chamber main body 13 is installed between side walls 10b and 10c of the vaporizer 10. This vaporization chamber main body 13
As shown in FIG. 3, the bottom wall 1 of the carburetor 10
A base 13a parallel to 0a, and a base 13a extending at right angles from both ends of the base 13a toward the bottom wall 10a.
a pair of side portions 13b, 13c in contact with the base 1;
It has a heat absorption protrusion 13d that protrudes from the center of 3a in a direction opposite to the side parts 13b and 13c. This vaporization chamber main body 13 is integrally molded. A base 13a and a pair of side portions 13b, 1 of the vaporization chamber main body 13
3c and the vaporizer bottom wall 10a form a vaporization chamber 14. This vaporization chamber 14 is supplied with liquid fuel and primary air. Vaporization chamber main body side parts 13b, 13c
are opposed to the side walls 10b, 10c of the carburetor 10, respectively, with slight gaps 15, 16 in between. These gaps 15, 16 act as premixing passages. The heat absorption protrusion 13d has a secondary air passage space 17 inside.
The secondary air passage 17 and the vaporization chamber 14 are separated by a partition plate 18. The partition plate 18 includes a meandering plate 19 that hangs down into the vaporization chamber 14, as shown in FIG. The side portions 13b, 13c of the vaporization chamber body 13 include premixed gas outlets 20 for allowing the premixed gas in the vaporization chamber 14 to flow out into the premixing passages 15, 16, as clearly shown in FIG. Furthermore, the heat absorption protrusion 13d has a large number of secondary air outflow holes 21 formed on the sloped surfaces on both sides of its tip. L-shaped metal fittings 22 are fixedly installed on both sides of the heat absorption protrusion 13d and on the inner surface of the outer plate 12, and these L-shaped metal fittings 2
Burner plates 23 and 24 are placed on the heat absorbing protrusion 13d so as to be adjacent to both sides of the heat absorption protrusion 13d. These burner plates 23 and 24 are positioned immediately below the secondary air outlet hole 21 at the tip of the heat-absorbing protrusion 13d.

Next, the operation of this burner structure will be explained. The liquid fuel in the vaporization chamber 14 is vaporized by the heat from the sheathed heater 11, and mixed with the primary air supplied at the same time. At this time, the primary air meanderes within the vaporization chamber 14 due to the meandering plate 19 fixed to the partition plate 18, so that mixing with the vaporized fuel is facilitated. This mixed gas flows into the premixing passages 15 and 16 from the premixed gas outlet 20 of the vaporization chamber main body 13 shown in FIG. 3 and rises therein. Since the premixing passages 15 and 16 are narrow, the flow of the mixed gas is made uniform. After passing through these premixing passages 15 and 16, the mixed gas rises to burner plates 23 and 24, where it is flame stabilized and combusted. On the other hand, the secondary air in the secondary air passage 17 inside the heat absorption protrusion 13d is ejected from the secondary air outlet hole 21 onto the mating burner plates 23 and 24, and the mixed gas is completely combusted in the burner plate. After this combustion, the tips of the heat absorption protrusions 13d receive heat from the flames on the burner plates 23, 24 and transmit it to the vaporization chamber 14, so that after ignition, the liquid fuel is vaporized by the heat of the flames. It can be carried out.

Note that when the vaporization chamber main body 13 is integrally molded as in this embodiment, the vaporization chamber 1 is formed from the heat absorption protrusion 13d.
The heat transfer up to 4 is extremely smooth and combustion heat can be used more effectively. Further, in this embodiment, the pair of side portions 13b, 13 of the vaporization chamber main body 13 can be removed without complicating the shape of the burner plates 23, 24.
The premixing passages 15 and 16 can be formed by simply arranging the premixing passages 15 and 16 to face each other with a small gap inside the vaporizer side walls 10b and 10c, respectively.
It is possible to make the mixed gas from 4 uniform and stabilize combustion. Further, since the combustion chamber 14 is separated by the vaporization chamber 14 to which primary air is supplied, the secondary air passage 17, and the partition plate 18, the combustion state can be easily controlled.

As is clear from the above description, according to the present invention, the heat collecting protrusion of the vaporizing chamber main body projects above the burner plate, making it easier to collect heat from the flame, and also attaching the heat collecting protrusion of the vaporizing chamber main body to both ends of the base. A pair of side portions extending from the side toward the bottom of the vaporizer are formed, and a premixing passage is formed between the pair of side portions and the pair of side portions of the vaporizer. The mixed gas passing through the premixing passage is constantly heated by the heater, and the fuel can be effectively vaporized, and the fuel in the vaporization chamber can also be effectively vaporized.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the burner structure of a conventional liquid fuel device, Fig. 2 is a partially cutaway perspective view of an embodiment of the burner structure of the liquid combustion device of the present invention, and Fig. 3 is a vaporization chamber of the above embodiment. A perspective view of the main body, and FIG. 4 is a perspective view of the partition plate of the above embodiment. 10... Carburizer, 10a... Bottom wall, 10b, 1
0c... Side wall, 11... Sheathed heater (heating means), 13... Vaporization chamber main body, 13a... Base, 1
3b, 13c... Side part, 13d... Heat absorption protrusion, 15, 16... Premixing passage, 17... Secondary air passage, 23, 24... Burner plate.

Claims (1)

[Scope of utility model registration request] A vaporizer is built into the vaporizer and has a built-in heating means and a bottom wall and a pair of side walls rising from both ends thereof, and a vaporization chamber is formed between the bottom wall and the vaporizer, and a heat collecting The vaporizing chamber main body is provided with a vaporizing chamber main body provided with a heat absorption protrusion, and burner plates are arranged below and on both sides of the tip of the heat absorption protrusion. A liquid fuel combustion device comprising a pair of side portions extending toward a bottom surface, and a premixing passageway being formed between the pair of side portions and the pair of side portions of the carburetor.