JPH10153319A - Combustion assisting device for solid fuel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion assisting device in which an economical cooking can be carried out under a complete combustion and high heating power in the case that heating and cooking are performed at a banquet or the like by using solid fuel contrary to the prior art in which a heating power was low and toxic gas was generated because of incomplete combustion. SOLUTION: There are provided a ventilating cylinder 1 having an air suction hole 3 for introducing primary combustion air into its lower half section and a tapered cylindrical flame collecting cylinder 2 having its diameter made smaller toward an upward direction which is mounted on the upper end of the ventilating cylinder 1. As a solid fuel 7 is placed at the central part of the ventilating cylinder 1 and burned, the primary combustion air is fed through the air suction hole 3. Gasified solid fuel is not dispersed, but completely ignited with a sufficient amount of combustion air, resulting in that the fuel is vigorously discharged out of an upper end of the flame collecting cylinder 2 having a small diameter. From between the ventilating cylinder 1 and the flame collecting cylinder 2 is supplied the secondary combustion air so as to promote a complete combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION Alcohol-based solid fuels (hereinafter simply referred to as solid fuels) have become widespread as portable fuels for hiking and the like and simple fuels for banquets. The present invention relates to a combustion aid used for promoting complete combustion of a solid fuel mainly when used at home or in a meeting room.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
The solid fuel C was placed in the stove A for solid fuel in which the ventilation holes B were formed, and the solid fuel C was burned to heat the cooked object D. Further, as disclosed in Japanese Utility Model Application Laid-Open No. 62-8011, a hot plate substitute in which a metal plate is formed into a cylindrical shape and a vent is formed in order to burn solid fuel contained in a portable can, 61-
As disclosed in Japanese Patent No. 252433, there is known a simple cooking stove in which fuel is fixed at the bottom of a cylindrical body and air holes are formed in side surfaces.

[0003]

In the conventional method of simply arranging and burning solid fuel at the center of a solid fuel stove, the vaporized solid fuel burns while being diffused to the surroundings. Only a slow flame was obtained and cooking took longer than necessary. In addition, since the flame using the solid fuel is not completely burned, it has a disadvantage that harmful substances are generated and often accompanied by off-flavors and eye irritation. Further, the above-mentioned known substitutes for cooking stoves and simple cooking stoves can simply be used for cooking without a cooking stove, and do not improve the combustion state of solid fuel.

[0004] In view of the drawbacks of the prior art, the present invention assists in the combustion of solid fuel so that the subject can be heated in a short time by a completely burned, vigorous flame. In addition, an object of the present invention is to provide a combustion assisting device for solid fuel, which can prevent generation of toxic gas due to incomplete combustion, which is a drawback of solid fuel, and can economically cook with less fuel. .

[0005]

According to the present invention, there is provided a combustion assisting device for a solid fuel according to the present invention, wherein a ventilation tube 1 having an intake hole 3 for introducing primary combustion air in a lower half portion, and a top end of the ventilation tube 1 And a flame collecting tube 2 having a tapered cylindrical shape having a smaller diameter toward the upper side. The solid fuel 4 is arranged at the center of the ventilation tube 1 and the vaporized solid fuel vapor is burned so as not to diffuse, while the flame discharge area is reduced by the upper flame collecting tube to collect the strong flame. Discharge from the upper end of the flame tube.

[0006] If a passage for secondary combustion air is formed between the ventilation tube 1 and the flame collection tube 2 by a fixed gap or a ventilation hole, a more powerful and completely burned flame is discharged from the upper end of the flame collection tube. Will be.

[0007]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is an exploded perspective view showing an example of the solid fuel combustion aid of the present invention, and FIG. 1 is a longitudinal sectional view showing the state of use thereof.

[0008] The ventilation cylinder 1 of the embodiment shown in FIG.
Three intake holes 3, 3 are formed by a semicircular notch from the lower end, and a portion without the notch is formed by three legs 1a,
1a. The flame collection tube 2 placed on the upper end of the ventilation tube 1
Like a truncated jinkasa, it has a tapered cylindrical shape with a relatively steep circular cross section, and the lower end diameter is larger than the diameter of the ventilation cylinder 1.
The diameter of the upper end opening is approximately one half of the diameter of the ventilation tube.

At the lower portion of the flame collecting cylinder 2, a plurality of locking projections 5 whose inner ends protrude inward from the diameter of the ventilation cylinder at a plurality of positions on the circumference where the diameter is slightly larger than the diameter of the ventilation cylinder. , 5 are formed. Therefore, when the flame collecting cylinder 2 is placed on the upper end of the ventilation cylinder 1, the flame collecting cylinder 2 is supported by the upper end of the ventilation cylinder 1 by the locking projection 5, and the secondary combustion is performed over the entire circumference except for the locking projection 5. A gap serving as an air passage is formed. Each of the ventilation tube 1 and the flame collection tube 2 can be made of any material as long as it is a non-flammable material. For example, a stamped product of a metal plate such as a stainless steel plate, a cast product, a ceramic product, or the like can be used. can do. In the illustrated example, both the ventilation tube 1 and the flame collection tube 2 are cylindrical, but it goes without saying that the ventilation tube 1 and the flame collection tube 2 can also be formed in a rectangular tube, an elliptical tube, or the like.

The heating state using the solid fuel combustion aid will be described with reference to FIG. Stove 6 for solid fuel
The solid fuel 7 is placed in the inside, and the ventilation cylinder 1
Place. After the solid fuel 7 is ignited, the flame collecting cylinder 2 is covered, and a heated object 8 such as a pan is placed on the stove.

[0011] In the solid fuel combustion aid, a negative pressure is generated in the static pressure due to the rise of the flame, that is, the chimney effect, and new air is successively sucked into the cylinder from the intake port 3 as primary combustion air. For combustion. The rising speed of the flame in the cylinder rises more vigorously than the normal combustion state by the chimney effect, and the flame that has risen is discharged from the upper end more vigorously by the flame collecting cylinder 2 because the discharge area becomes smaller. It is discharged toward the object to be heated 8. At this time, secondary combustion air is blown from a passage and a gap between the ventilation tube and the flame collection tube. When the secondary combustion air is blown in from the outer periphery, the combustion of the flame in the incompletely burned portion of the flame is promoted, and the flame becomes a strong flame that has been completely completely burned, and is discharged from above with a strong momentum.

The passage of the secondary combustion air between the ventilation tube 1 and the flame collection tube 2 does not necessarily need to be consciously formed, but merely places the flame collection tube 2 on the ventilation tube 1. You may.
In general, there is no airtightness only by the contact between the ventilation cylinder 1 and the flame collection cylinder 2, and a small amount of secondary combustion air is introduced by the negative pressure in the cylinder, but the upper end of the ventilation cylinder 1 serves as a secondary combustion air passage. A number of through holes can be formed in the part. However, even if the passage for the secondary combustion air is not formed and the ventilation tube 1 and the flame collection tube 2 are in close contact with each other and there is no inflow of the secondary combustion air, the introduction of the primary combustion air by the chimney effect is promoted, and the primary combustion is performed. Even with air alone, a much better combustion state can be achieved compared to conventional methods.

FIGS. 3 and 4 show a modified example of the ventilation tube 1 and the flame collecting tube 2. In this modified example, a large number of circular intake holes 3, 3 are provided in the lower half of the cylindrical ventilation tube 1. FIG. Has been drilled. At the lower end of the flame collection tube, which is a truncated
Inwardly-turned claws 9 are formed at a plurality of equally-spaced positions on the circumference, and cutouts 10 and 10 that engage with the folded-back claws 9 are provided at the upper end of the ventilation tube 1. Thereby, the ventilation tube 1 and the flame collection tube 2 are firmly stabilized, and as shown in FIG. 4, certain gaps 11 and 11 are secured between the ventilation tube 1 and the flame collection tube 2 as passages for secondary combustion air. Is done.

FIGS. 5 and 6 show another modification, in which an eave-shaped step portion 12 is formed at the lower end of the flame collecting tube 2 and the ventilation tube 1 is formed.
The upper end of the ventilation tube 1 is provided with a plurality of projections 13 having a fixed height. In this modified example, the stepped portion 12 of the flame collecting cylinder 2 is supported on the upper ends of the projections 13, 13, and a projection is provided between the ventilation cylinder 1 and the flame collecting cylinder 2.
Gaps 11, 11 corresponding to the height of 13 are formed as passages for the secondary combustion air. The flame collecting tube 2 is provided with a handle 14 for handling.

FIG. 7 is a plan view showing an embodiment in which a large number of folds 15, 15 are formed on the flame collecting cylinder 2 from bottom to top. In the illustrated example, the fold 15 is spirally inclined. When the flame collecting tube 2 is placed on the ventilation tube 1, a passage for the secondary combustion air that necessarily matches the cross-sectional shape of the fold is formed, and the fold 15 is helically inclined as shown in the illustrated example. In this case, the introduced secondary combustion air is swirled to agitate the solid fuel flame, so that complete combustion of the flame is further promoted, and the high-temperature complete combustion flame is vigorously discharged.

FIG. 8 is a bottom view of an embodiment in which the flame guides 16 and 16 are formed by a plurality of ribs on the inner surface of the flame collecting cylinder 2, and FIG. 9 is a longitudinal sectional view thereof. When a plurality of flame guides 16 are formed on the inner surface of the flame collecting cylinder 2, the flame is stabilized, and the flame with little flickering and stable and vibrant is discharged. When the lower ends 16a of the flame guides 16, 16 are aligned at a certain position slightly higher than the lower end of the flame collecting cylinder 2, as shown in FIG.
The lower ends of the flame guides 16 and 16 function as bearing surfaces for the ventilation tube 1, and a gap serving as a passage for the secondary combustion air is also secured.

In the illustrated examples of FIGS. 8 and 9, the flame guide 16 is formed linearly from the lower side to the upper side.
This can be formed spirally as shown in FIG. In this way, when the flame guide is formed in a spiral shape, the flames defined to some extent form a vortex, and a vortex is formed more clearly than the vortex caused by the spiral fold, thereby promoting more complete combustion of the flame. can do.

It should be noted that the ventilation tube 1 and the flame collection tube 2 can have a shape other than a circular cross-section, as described above. It is also possible. In this case, the passage of the secondary combustion air is inevitably formed by placing the flame collecting cylinder 2 on the ventilation cylinder 1. For example, FIG. 11 shows an example in which a hexagonal cylinder-shaped ventilation cylinder is combined with a tapered cylindrical flame collection cylinder 2 having a circular cross section.
11 will be formed.

FIG. 13 is a perspective view for explaining a use state of the solid fuel combustion aid of the present invention. First, the solid fuel placed at the center of the ventilation tube 1 is ignited with the flame collection tube 2 removed, and the handle 14 of the flame collection tube 2 is held, and the flame collection tube 2 is placed on the ventilation tube 1. . If the solid fuel is burning even after the heating is completed, the fire may be extinguished using the fire extinguisher 17. As an example of the fire extinguisher 17, a fire-extinguishing fire is performed in an oxygen-deficient state by covering from above using a blind cylindrical body into which the entire solid fuel combustion aid enters completely. The fire extinguisher 17 in the illustrated example has a handle at the upper end.
18 is provided so that it can be hung over and covered from above.

When the solid fuel combustion aid according to the present invention is used in a place where many people use it at once in an inn or a banquet hall, it is more effective in saving fuel and suppressing generation of toxic gas. is there. For this purpose, it is desirable that the storage device is convenient for storage and handling. However, since the product of the present invention is separated into the ventilation tube 1 and the flame collection tube 2, each of them can be handled as a plurality. In particular, since the flame collection tubes are tapered, they can be stacked without being bulky. In addition, ventilation tube 1
If is set as a tapered cylinder having a very small angle, the ventilation cylinders 1 can also be easily stacked. In particular, where a large number of components are required, the solid fuel combustion aid may be formed by pressing a thin metal plate and the ventilation cylinder 1 may be formed into a tapered cylinder having a slight angle.

[0021]

According to the solid fuel combustion aid according to the first aspect of the present invention, it is possible to carry out heating cooking using solid fuel, which has conventionally been weak in thermal power and easily spread in a wide range of flames to cause incomplete combustion. Heating the heated object with a strong flame like a burner, complete combustion and no unpleasant toxic substances,
There is an effect that effective heating and cooking can be performed with a relatively small amount of solid fuel.

According to the second aspect of the present invention, the secondary combustion air is introduced into the combustion flame by the primary combustion air to promote more complete combustion and to perform the heating cooking by the vigorous flame.

According to the third aspect of the present invention, the secondary combustion air passage according to the second aspect of the invention can be formed as a uniform gap having a uniform size over the entire circumference of the ventilation tube, and is stable. A simple combustion state can be realized.

According to the fourth aspect of the present invention, a secondary combustion air passage conforming to the shape of the fold is formed by the folds of the flame collecting cylinder, and the secondary combustion air introduced into the vessel is swirled. Therefore, the mixing of the secondary combustion air and the flame is further promoted, and a more excellent complete combustion state can be realized.

According to the fifth aspect of the present invention, the flow of the flame is stabilized by the flame guide, and a clean and stable flame can be obtained, so that the object to be heated can be cooked more effectively.

According to the sixth aspect of the present invention, by placing the flame collecting cylinder on the ventilation cylinder, it is possible to inevitably form a gap serving as a passage for secondary combustion air having a fixed shape.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a cooking state using a combustion assisting device for solid fuel of the present invention,

FIG. 2 is an exploded perspective view showing an example of the solid fuel combustion aid of the present invention.

FIG. 3 is an exploded perspective view showing a modified example of the solid fuel combustion aid of the present invention;

4 is a longitudinal sectional view showing a combustion state of the example shown in FIG. 3 using the solid fuel combustion aid of the present invention;

FIG. 5 is an exploded perspective view showing another modification of the solid fuel combustion aid of the present invention.

6 is a longitudinal sectional view of the solid fuel combustion aid shown in FIG. 5;

FIG. 7 is a plan view of a flame collecting cylinder having a pleated form;

FIG. 8 is a bottom view of a flame collecting cylinder having a flame guide formed on an inner surface;

FIG. 9 is a longitudinal sectional view of the flame collecting cylinder of FIG. 8;

FIG. 10 is a bottom view of a flame collecting cylinder in which a flame guide is formed on the inner surface and the flame guide is formed in a spiral shape;

FIG. 11 is a bottom view showing an embodiment of a combination of a square cylindrical ventilation cylinder and a circular cross section flame collection cylinder;

FIG. 12 is a longitudinal sectional view showing a conventional mode of heating and cooking using solid fuel,

FIG. 13 is a perspective view showing an example of the solid fuel combustion aid of the present invention and a fire extinguisher for extinguishing a fire in a combustion state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vent cylinder, 2 ... Flame collection cylinder, 3 ... Intake hole, 4 ... Solid fuel, 5 ... Locking protrusion, 6 ... Stove, 7 Solid fuel,
8: Heated object, 9: Folded nail, 10: Notch,
11 ... gap, 12 ... step, 13 ... protrusion, 14 ... handle,
15 ... folds, 16 ... flame guide.

Claims (6)

[Claims] 1. A ventilation cylinder having an intake hole for introducing primary combustion air in a lower half thereof, and a tapered cylinder-shaped flame collection cylinder mounted on an upper end of the ventilation cylinder and having an upwardly smaller diameter. Then, the solid fuel is placed in the center of the ventilation cylinder and burned, primary combustion air is introduced from the intake hole of the ventilation cylinder, the flame discharge area is reduced by the flame collection cylinder, and the flame is discharged from the upper end of the flame collection cylinder. A combustion assisting device for solid fuel, which is discharged. 2. A ventilation cylinder having an intake hole for introducing primary combustion air in a lower half thereof, and a taper-shaped flame collecting cylinder mounted on an upper end of the ventilation cylinder and having an upwardly smaller diameter. Then, a secondary combustion air passage is formed between the ventilation tube and the flame collection tube, and when the solid fuel is disposed in the center of the ventilation tube and burned, primary combustion air is introduced from the intake hole of the ventilation tube. In addition, secondary combustion air is introduced from the passage between the ventilation tube and the flame collecting tube, and the flame is discharged from the upper end of the flame collecting tube by reducing the discharge area in the flame collecting tube. A combustion aid for solid fuel. 3. An inwardly projecting locking projection is formed at a plurality of positions of the flame collecting cylinder, and the locking projection is supported on the upper end of the ventilation cylinder. 3. The solid fuel combustion aid according to claim 2, wherein a secondary combustion air passage having a constant gap is formed between the upper end and the inner surface of the flame collecting cylinder. 4. The combustion assisting device for solid fuel according to claim 2, wherein a plurality of folds are formed in the tapered cylindrical flame collecting cylinder, and the folds are spirally inclined upward from below. 5. The solid fuel combustion aid according to claim 2, wherein a flame guide formed by a plurality of ribs is formed on an inner surface of the tapered cylindrical flame collecting cylinder. 6. The ventilation cylinder and the flame collection cylinder have different cross-sectional shapes, and when the flame collection cylinder is mounted on the upper end of the ventilation cylinder, a passage for secondary combustion air is provided between the ventilation cylinder and the flame collection cylinder. 3. The combustion aid for solid fuel according to claim 2, wherein a gap is formed.