JP3246912U - Liquid fuel stove - Google Patents

Abstract

The present invention provides a liquid fuel stove that is capable of achieving efficient combustion using highly safe liquid fuel.
[Solution] The liquid fuel stove 1 comprises a cylindrical outer member 10 with a bottom that stores liquid fuel injected inside, and an approximately cylindrical inner member 11 disposed inside the outer member 10. The inner member 11 is a hollow cylindrical portion extending upward from the bottom portion of the outer member 10 and includes a fuel supply member 20 made of linear metal material formed into a mesh shape, and the liquid fuel stored in the outer member 10 is configured to permeate through the fuel supply member 20 to the upper end by capillary action.
[Selected Figure] Figure 1

Description

This invention relates to a liquid fuel stove that uses liquid fuel as a heat source.

Liquid fuel stoves that use liquid fuel such as alcohol as a heat source have been known as portable combustion appliances suitable for use in camping and the like. For example, the stove in Patent Document 1 has a structure in which a liquid-absorbent member made of carbon felt or the like is placed between an outer member and an inner member. When using such a stove, fuel such as alcohol is refilled into the fuel storage section, the fuel is sucked up to the top by the capillary action of the liquid-absorbent member, and combustion begins when the vaporized fuel is ignited. A trivet is placed on top of the stove, and a pot or the like supported by the trivet can be heated.

Utility Model Registration No. 3232390

The alcohol used as the liquid fuel in the above-mentioned conventional liquid fuel stoves has a low flash point, so it is prone to rapid combustion when ignited and requires careful handling. For example, if alcohol leaks into the surrounding area, it may cause unintended ignition. In addition, since the flame of alcohol is almost colorless and transparent, it is difficult to see, especially outdoors, and there is a risk of clothing catching fire or being burned if the user accidentally touches it. In this case, in order to avoid the risk, it is assumed that a fuel such as diethylene glycol, which has a sufficiently higher flash point than alcohol, will be used. However, diethylene glycol has a higher viscosity than alcohol, and is prone to clogging during the capillary phenomenon of materials such as carbon felt, making it difficult to suck up to the top. Thus, when using the above-mentioned conventional liquid fuel stoves, it was difficult to achieve combustion using a liquid fuel with high safety.

This invention was made to solve these problems, and provides a liquid fuel stove that has a relatively simple structure and can achieve safer combustion using liquid fuel.

In order to solve the above problems, the liquid fuel stove of the present invention is a liquid fuel stove that uses liquid fuel as a heat source, and includes a cylindrical outer member with a bottom that stores the liquid fuel injected inside, and an approximately cylindrical inner member that is placed inside the outer member, the inner member is a hollow cylindrical portion that extends upward from the bottom surface of the outer member and includes a fuel supply member made of linear metal material formed into a mesh, and the liquid fuel stored in the outer member is structured to permeate through the fuel supply member to the upper end by capillary action.

The liquid fuel stove according to the present invention can be applied in various forms. For example, the inner member can further include a support member that is placed on the bottom surface of the outer member and supports the fuel supply member.

The inner circumference of the outer member and the outer circumference of the support member can be formed to coincide with each other when viewed from above. Furthermore, the fuel supply member can be formed using a stainless steel mesh formed by forming stainless steel wire into a mesh shape.

This invention employs a relatively simple structure, and even when using highly viscous liquid fuel, it is possible to easily suck up the liquid fuel to the top end of the inner member by capillary action, and it is possible to use diethylene glycol as the liquid fuel instead of alcohol, which is highly dangerous, thereby realizing a liquid fuel stove that is highly visible, safe, and capable of efficient combustion.

1 is a perspective view showing the overall structure of a liquid fuel stove 1 according to the present embodiment. FIG. 2 is an exploded perspective view showing the components that constitute the liquid fuel stove 1 of the present embodiment. 2 is a side cross-sectional view showing the cross-sectional structure of the liquid fuel stove 1 of FIG. 1. 3A to 3C are diagrams illustrating a method of forming the fuel supply member 20.

Below, an embodiment of a liquid fuel stove to which the present invention is applied will be described with reference to the attached drawings. The liquid fuel stove 1 in this embodiment is a portable combustion device that can burn liquid fuel poured into the internal space as a heat source. As the liquid fuel, for example, diethylene glycol, which has a relatively high flash point, can be used.

First, the structure and function of the liquid fuel stove 1 in this embodiment will be described with reference to Figures 1 to 4. Figure 1 is a perspective view showing the overall structure of the liquid fuel stove 1. Figure 2 is an exploded perspective view showing the components that make up the liquid fuel stove 1 in Figure 1, and Figure 3 is a side cross-sectional view showing the cross-sectional structure of the liquid fuel stove 1 in Figure 1. Also, Figure 4 is a diagram explaining the method of forming the fuel supply member 20.

The liquid fuel stove 1 of this embodiment is a portable combustion appliance that can be carried with one hand. As shown in FIG. 1, the liquid fuel stove 1 is composed of an outer member 10, which is a cylindrical container with a bottom, and an inner member 11, which is a substantially cylindrical shape and is placed inside the outer member 10. As shown in FIG. 2, the outer member 10 has a bottom surface portion 10a that is circular when viewed from above, and a side surface portion 10b that surrounds the upper part along the outer periphery of the bottom surface portion 10a, and has a structure that can store a predetermined amount of liquid fuel inside. The inner member 11 has a structure in which a fuel supply member 20, which is a mesh-like hollow cylindrical portion, is joined to an annular support member 21 (FIG. 2) that supports the lower end 20a of the fuel supply member 20.

The outer member 10 and the support member 21 are formed of a metal such as stainless steel having a predetermined thickness. As shown in FIG. 2, the support member 21 has an annular portion 21a supported by the bottom surface portion 10a, and a joint portion 21b that extends cylindrically at a certain height from the end of the inner circumference side of the annular portion 21a, and the outer circumference side of this joint portion 21b is joined by welding or the like to the inner circumference side near the lower end 20a of the fuel supply member 20. When viewed from above, the inner circumference of the outer member 10 and the outer circumference of the support member 21 are almost the same, so if the support member 21 is arranged so that it is in contact with the bottom surface portion 10a of the outer member 10, the inner member 11 is stably maintained without moving sideways at a position where both are symmetrically arranged with respect to a common central axis.

Here, the fuel supply member 20 is formed, for example, using a horizontally elongated stainless steel mesh 30 as shown in FIG. 4. The stainless steel mesh 30 is a thin material formed by weaving thin stainless steel wires like cloth into a mesh shape, with countless mesh holes of about a few millimeters. Then, as shown in FIG. 4, the stainless steel mesh 30 cut into a rectangular shape with length A and width B is bent into a cylindrical shape and both ends are joined by welding or the like, thereby producing the fuel supply member 20 having the shape shown in FIG. 2.

Note that width B in FIG. 4 corresponds to the height of fuel supply member 20 (FIG. 2), but length A in FIG. 4 is set to about twice the circumference of the fuel supply section. As a result, fuel supply member 20 is produced with stainless steel mesh 30 wound twice, and its thickness is roughly about twice that of stainless steel mesh 30. The number of turns of stainless steel mesh 30 can be freely set, but when increasing the contact area for capillary action to improve combustion efficiency, it is desirable to increase the number of turns of stainless steel mesh 30.

When the liquid fuel stove 1 is burned, as shown in FIG. 3, a predetermined amount of liquid fuel 2 is injected from above the outer member 10, and the injected liquid fuel 2 is stored inside the outer member 10. The liquid fuel 2 passes through the numerous mesh-like openings in the fuel supply member 20 and penetrates to the inside of the inner member 11, so that the inside of the outer member 10 is filled with liquid fuel 2 to an even height overall. After that, the liquid fuel 2 permeates to the top through the numerous stainless steel wires of the fuel supply member 20 due to capillary action in the fuel supply member 20, and the fuel supply member 20 is entirely absorbed from the bottom end 20a to the top end 20b.

In the above state, the liquid fuel 2 is ignited near the upper end 20b of the fuel supply member 20 using a lighter or the like, and the partially vaporized liquid fuel 2 begins to burn. The liquid fuel 2 continues to be supplied by the above-mentioned capillary phenomenon of the fuel supply member 20, and a flame 3 is generated as a heat source near the upper end 20b as shown in FIG. 3. When viewed from above, this flame 3 is distributed along the annular shape of the fuel supply member 20. The liquid fuel 2 injected into the liquid fuel stove 1 gradually decreases as combustion continues, and the fuel ends when the liquid fuel 2 is finally exhausted.

In the liquid fuel stove 1 of this embodiment, it is desirable to use, for example, diethylene glycol as the liquid fuel 2. Alcohol, a common liquid fuel, has a flash point of approximately 13 degrees, so it is easily ignited at outside temperatures and can cause rapid combustion, making it highly dangerous. In addition, alcohol flames are nearly colorless and transparent, making them difficult to see, so there is a risk that a user may be burned or have their clothes ignited if they come into contact with it. In contrast, diethylene glycol has a high flash point of 147 degrees, and the flame is colored and easily visible, so the dangers of alcohol as described above can be sufficiently reduced.

Conventional liquid fuel stoves (for example, the stove in Patent Document 1) are based on the premise that alcohol is primarily used as fuel. If diethylene glycol were used as fuel in the stove in Patent Document 1, it would not be easy to properly absorb the liquid fuel through a liquid-absorbing member made of carbon felt or the like. That is, diethylene glycol has a higher viscosity than alcohol, and is therefore more likely to become clogged with materials such as carbon felt, preventing smooth liquid absorption and interfering with liquid absorption by capillary action.

In contrast, the liquid fuel stove 1 of this embodiment uses a fuel supply member 11 made of stainless steel mesh 30, which allows for smoother capillary action along the linear stainless steel than when carbon felt or the like is used, making it possible to appropriately supply diethylene glycol, which has a high viscosity, as the liquid fuel 2. As mentioned above, using alcohol as the liquid fuel 2 increases the risk, but using diethylene glycol as the liquid fuel 2 in the liquid fuel stove 1 of this embodiment reliably increases safety. However, in this embodiment, it is also possible to use a liquid fuel 2 other than diethylene glycol, provided safety is ensured.

When using the liquid fuel stove 11 of this embodiment, for example, a trivet can be placed on top of it, and pots and cups used for cooking can be supported by the trivet and heated by the flame 3. In this case, the burning time can be appropriately adjusted according to the amount of liquid fuel 2 injected into the liquid fuel stove 1. The burning time of the liquid fuel stove 1 is maximum when the liquid fuel 2 is injected close to the upper end 20b of the fuel supply member 20, but the burning time can be further extended by refilling the liquid fuel 2 when it decreases.

The liquid fuel stove 11 of this embodiment has a relatively simple structure combining an outer member 10 and an inner member 11, both of which are made of metal, and does not require materials such as carbon felt. Therefore, in addition to being safe, the liquid fuel stove 1 of this embodiment is easy to manufacture and has a structure that is advantageous for achieving small size and low cost. As described above, the liquid fuel stove 1 of this embodiment can achieve efficient combustion while improving safety by using a liquid fuel 2 such as diethylene glycol alcohol, thanks to the action of the fuel supply member 20 using the stainless steel mesh 30.

The above describes the contents of the present invention in detail based on this embodiment, but the present invention is not limited to the contents of the above embodiment, and various modifications can be made without departing from the gist of the invention. For example, the specific shapes and materials of the outer member 10 and the inner member 11 can be modified in various ways as long as they can achieve the functions required for the liquid fuel stove 1 of the present invention.

1... liquid fuel stove 2... liquid fuel 3... flame 10... outer member 11... inner member 20... fuel supply member 21... support member

Claims (4)

A liquid fuel stove that uses liquid fuel as a heat source,
a cylindrical outer member having a bottom for storing the liquid fuel injected therein;
an inner member having a substantially cylindrical shape and disposed inside the outer member;
Equipped with
The inner member is a hollow cylindrical portion extending upward from the bottom portion of the outer member and includes a fuel supply member made of linear metal material formed into a mesh shape, and the liquid fuel stored in the outer member permeates through the fuel supply member to the upper end by capillary action.This liquid fuel stove is characterized in that the inner member is a hollow cylindrical portion extending upward from the bottom portion of the outer member and includes a fuel supply member made of linear metal material formed into a mesh shape, and the liquid fuel stored in the outer member permeates through the fuel supply member to the upper end by capillary action. The liquid fuel stove of claim 1, characterized in that the inner member further includes a support member that is placed on the bottom surface of the outer member and supports the fuel supply member. The liquid fuel stove according to claim 1 or 2, characterized in that, when viewed from above, the inner circumference of the outer member and the outer circumference of the support member have shapes that match each other. 4. The liquid fuel stove according to claim 1, wherein the fuel supply member is formed of a stainless steel mesh formed by shaping stainless steel wire into a mesh shape.

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