Portable gas stove and fuel container

Abstract

A cassette stove that uses hydrogen gas as fuel and is capable of suppressing the occurrence of backfire, and a fuel container that supplies hydrogen gas to the cassette stove are provided. [Solution] The cassette stove 10 is a cassette stove that uses hydrogen gas as fuel, and is equipped with an attachment section 12 to which a fuel container 100 containing sealed hydrogen gas is attached, a burner section 20, and a supply pipe 14 that supplies the hydrogen gas in the fuel container 100 attached to the attachment section 12 to the burner section 20 while being isolated from the air, and the burner section 20 mixes the hydrogen gas supplied from the supply pipe 14 with the air surrounding the burner section 20 and combusts it.

Description

[Technical field]

[0001] The present invention relates to a portable stove and a fuel container, and more particularly to a portable stove that uses hydrogen gas as fuel and a fuel container that supplies hydrogen gas to the portable stove. [Background technology]

[0002] 2. Description of the Related Art Conventionally, cassette stoves that can be used both indoors and outdoors have been used for cooking and the like (see, for example, Patent Document 1). In the technology described in Patent Document 1, butane (C4H 10 ) Air is mixed with a fuel such as gas in a mixing tube, and the mixed gas is supplied to a burner, where it is burned. The combustion method of this type of portable stove is generally called the "premixed combustion method." Portable stoves that use butane gas or other fuels and use the premixed combustion method are widely used not only during disasters but also in everyday life. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-349515 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, from the perspective of carbon neutral policies aimed at protecting the global environment, there has been a desire to switch from fuels such as butane gas, which emits CO2 gas, to other fuels not only in large equipment such as industrial furnaces, but also in portable stoves, which are small combustion appliances used in everyday life. One possible solution to this problem is to use hydrogen gas, which does not emit CO2 gas, as fuel. Hydrogen gas is non-toxic, has a light specific gravity, and has a wide range of combustion, making it a superior fuel compared to conventional fuel gases such as butane gas. On the other hand, hydrogen gas has a faster burning speed than conventional fuel gases. Therefore, when hydrogen gas is used as fuel in the cassette stove described in Patent Document 1, there is a risk of backfire. In order to use a cassette stove that uses hydrogen gas as fuel safely and stably, it is necessary to suppress the occurrence of such backfire.

[0005] Therefore, the present invention has been made in consideration of the above-mentioned problems, and its object is to provide a cassette stove that uses hydrogen gas as fuel and is capable of suppressing the occurrence of flashback, and a fuel container that supplies hydrogen gas to the cassette stove. [Means for solving the problem]

[0006] The above-mentioned objectives are achieved by the cassette stove of the present invention, which is a cassette stove that uses hydrogen gas as fuel and is equipped with an attachment section to which a fuel container containing sealed hydrogen gas is attached, a burner section, and a supply section that supplies the hydrogen gas in the fuel container attached to the attachment section to the burner section while being isolated from the air, and the burner section mixes the hydrogen gas supplied from the supply section with the air surrounding the burner section and burns it.

[0007] In addition, the cassette stove of the present invention may further include a pressure adjustment unit that adjusts the pressure of the hydrogen gas supplied from the fuel container attached to the mounting unit, and the burner unit may be supplied with hydrogen gas whose pressure has been adjusted by the pressure adjustment unit. The burner unit may also have a ring-shaped pipe to which hydrogen gas is supplied, and a nozzle unit provided in the pipe for discharging the hydrogen gas in the pipe to the outside. The nozzle portion may have a plurality of first openings formed in the pipe, a box body that surrounds the plurality of first openings from the outside of the pipe to block the plurality of first openings from the outside, and one or more second openings that are formed in the box body and are fewer in number than the plurality of first openings, and hydrogen gas that flows into the box body from the pipe through the plurality of first openings may be released to the outside from the one or more second openings. The nozzle portion may further have a mesh member disposed within the box body, and hydrogen gas flowing from the pipe into the box body via the multiple first openings may be released to the outside from the second opening after passing through the mesh member. In addition, the fuel container of the present invention is a fuel container that supplies hydrogen gas to the above-mentioned cassette stove, and includes a container body and a powder that is contained within the container body and stores and releases hydrogen gas. In addition, the fuel container of the present invention may further include an outlet for spraying hydrogen gas within the container body to the outside, and a filter located upstream of the outlet in the direction of hydrogen gas spraying, for preventing powder from flowing out of the container body when hydrogen gas is sprayed to the outside from the outlet. Effect of the Invention

[0008] According to the present invention, it is possible to provide a cassette stove that uses hydrogen gas as fuel and is capable of suppressing the occurrence of flashback, and a fuel container that supplies hydrogen gas to the cassette stove. [Brief description of the drawings]

[0009] [Figure 1] 1 is a plan view showing a cassette stove according to an embodiment of the present invention with a fuel container according to an embodiment of the present invention attached thereto; FIG. [Diagram 2] FIG. 2 is a cross-sectional view taken along the line AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a cassette stove and a fuel container according to one embodiment of the present invention (hereinafter, this embodiment) will be described with reference to the accompanying drawings. The embodiment described below is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. In other words, the present invention may be modified or improved without departing from the spirit of the present invention. In addition, the present invention naturally includes its equivalents.

[0011] In addition, in the drawings, the cassette stove and each part of the fuel container are illustrated somewhat simplified or schematic in order to make the explanation easier to understand. Furthermore, the size (dimensions) of each part of the cassette stove and each part of the fuel container shown in the drawings and the spacing between parts may differ from the actual ones. In addition, in this specification, the meaning of "same" may include a generally acceptable range of error in the technical field to which the present invention belongs. In addition, in this specification, "horizontal", "vertical", and "perpendicular" include the range of error permitted in the technical field to which the present invention belongs. For example, in this specification, "horizontal", "perpendicular", and "perpendicular" mean that they are within a range of less than ±10° from the strict "horizontal", "perpendicular", and "perpendicular". The error from the strict "horizontal", "perpendicular", and "perpendicular" is preferably 5° or less, and more preferably 3° or less.

[0012] <<Configuration example of the cassette stove according to this embodiment>> An example of the configuration of a cassette stove according to this embodiment (hereinafter, "cassette stove 10") will be described with reference to Figs. 1 and 2. The cassette stove 10 is a cassette stove that uses hydrogen gas as fuel. Because the cassette stove 10 uses hydrogen gas as fuel, it does not emit CO2 gas when the fuel (hydrogen gas) is burned, and is therefore preferable from the perspective of carbon neutral policies aimed at protecting the global environment compared to conventional fuel gases (butane gas, etc.). The cassette stove 10 can heat a heating object such as a cooking appliance (for example, a griddle and a pot) whether it is used indoors or outdoors.

[0013] Specifically, the cassette stove 10 supplies hydrogen gas to the burner section 20 described below while isolating it from the air (strictly speaking, oxygen gas), and the hydrogen gas supplied to the burner section 20 is mixed with the air surrounding the burner section 20 and burned. This method of supplying fuel (hydrogen gas) to the burner section without mixing it with the oxidizer (air) and mixing the fuel with the oxidizer only at the burner section is called the "diffusion combustion method." On the other hand, the "premixed combustion method" used in the portable stove of Patent Document 1 described in the "Background Art" section supplies the fuel and oxidizer to the burner section in a premixed state, which is different from the diffusion combustion method. Among the diffusion combustion methods, a method in which fuel is mixed with an oxidizer at the tip of the burner (specifically, the nozzle portion 22 described later) is also called a "pre-mixed combustion method."

[0014] "Air" refers to ordinary air, a collection of gases made up of nitrogen gas, oxygen gas, and other gases.

[0015] More specifically, as shown in FIG. 1, the cassette stove 10 includes a housing 11, an attachment section 12, a pressure adjustment section 13, a supply pipe 14 (corresponding to the supply section), an operating section 15, and a burner section 20.

[0016] In the following explanation, the state in which the cassette stove 10 is placed on a horizontal surface is defined as the normal state of use, and unless otherwise specified, when describing the position of the cassette stove 10 and the orientation and extension direction of each part of the cassette stove 10, the position, orientation, and extension direction of the cassette stove 10 when in the normal state of use will be indicated. In the following description, the direction perpendicular to the horizontal surface on which the cassette stove 10 is placed is referred to as the "up-down direction (vertical direction)." Therefore, Fig. 1 is a view seen from above in the up-down direction.

[0017] In this embodiment, the mounting section 12, pressure adjustment section 13, supply pipe 14, operation section 15, and burner section 20 are arranged (laid out) in a direction along the above-mentioned horizontal surface (the surface on which the cassette stove 10 is placed), and in the example shown in Fig. 1, the sections 12-15, 20 are arranged in positions that do not overlap each other when viewed from the top and bottom. However, this is not limited to this, and the positions of the sections 12-15, 20 in the cassette stove 10 may be anywhere as long as they can function as the cassette stove 10, and for example, they may overlap each other when viewed from the top and bottom.

[0018] <Case> As shown in FIG. 1, the housing 11 forms a box body that houses the mounting portion 12, the pressure adjusting portion 13, the supply pipe 14, and the burner portion 20. As shown in FIG. 1, an attachment opening 11a and a burner opening 11b are formed in the upper wall (top plate) of the housing 11. The mounting opening 11a is formed at a position facing at least the mounting portion 12 in the vertical direction. This allows a user to mount a fuel container 100, which will be described later, to the mounting portion 12 through the mounting opening 11a. Note that the housing 11 may be provided with, for example, a cover (not shown) that opens and closes the mounting opening 11a. The burner opening 11b is formed in a position facing the burner section 20 in the up-down direction. As a result, a nozzle section 22 (described later) constituting the burner section 20 is exposed to the outside through the burner opening 11b.

[0019] In addition, a plurality of (four in FIG. 1) support parts 11c (trivets) are provided on the upper wall of the housing 11 to support an object to be heated directly above the burner part 20. The four support parts 11c are arranged at intervals along the periphery of the burner opening 11b. For example, multiple (e.g., four) legs (not shown) protrude from the lower wall (bottom plate portion) of the housing 11, and the cassette stove 10 is placed on the support surface (horizontal surface) when the multiple legs (not shown) come into contact with the support surface.

[0020] The housing 11 may be constructed by forming each wall, such as the upper wall, lower wall, and side walls, that constitute the housing 11 as a box body integrally (seamlessly), or by joining each wall by welding, bonding, or fastening with screws, etc. The material of the housing 11 may be any material that satisfies the heat resistance conditions, etc. of the cassette stove 10, and may be, for example, a metal material, a resin material, or a combination thereof.

[0021] <Attachment part> The mounting part 12 mounts a fuel container 100, which is filled with hydrogen gas and will be described later. More specifically, the mounting part 12 has a storage space that stores the fuel container 100 and a wall that surrounds the storage space. The storage space of the mounting part 12 may have any shape that can store the fuel container 100, and may have a shape that corresponds to the outer shape of the fuel container 100, for example. The wall of the mounting part 12 may be composed of a plurality of wall parts, and the plurality of wall parts may be formed integrally (seamlessly), or may be joined by welding, adhesion, or fastening using screws or the like. The wall of the mounting part 12 may be a part of the housing 11, or may be a part different from the housing 11. The material of the mounting part 12 may be any material that satisfies the heat resistance conditions of the cassette stove 10, and may be, for example, a metal material, a resin material, or a combination thereof. In this way, by providing the mounting section 12, the cassette stove 10 can be fitted with the fuel container 100, and as a result, the hydrogen gas sealed in the fuel container 100 can be properly supplied to the burner section 20.

[0022] <Pressure adjustment section> The pressure adjusting unit 13 adjusts the pressure of the hydrogen gas supplied from the fuel container 100 attached to the attachment unit 12. As a result, hydrogen gas whose pressure has been adjusted by the pressure adjusting unit 13 is supplied to the burner unit 20, which will be described later. Furthermore, the pressure adjusting section 13 may cut off the supply of hydrogen gas from the fuel container 100 to the burner section 20 when the pressure in the fuel container 100 becomes higher than a predetermined pressure (for example, when the pressure becomes abnormal). Moreover, the pressure adjustment unit 13 may be configured to work in conjunction with an operation unit 15 (operation knob) described later. Specifically, the pressure adjustment unit 13 may supply hydrogen gas from the fuel container 100 to the burner unit 20, adjust the pressure, supply amount, supply speed, etc. of the hydrogen gas to be supplied, or cut off the supply of hydrogen gas, by rotating the operation unit 15. In this way, by providing the pressure adjustment unit 13, the cassette stove 10 can supply hydrogen gas with adjusted pressure (hydrogen gas with adjusted supply amount) to the burner unit 20, and as a result, the hydrogen gas can be burned appropriately in the burner unit 20.

[0023] <Supply pipe> The supply pipe 14 supplies hydrogen gas in the fuel container 100 attached to the attachment portion 12 to the burner portion 20 in a state in which the hydrogen gas is isolated from the air, in other words, in a state in which the hydrogen gas is not mixed with the air.

[0024] More specifically, the supply pipe 14 is a pipe member that connects the pressure adjustment unit 13 to a pipe 21 (described later) that constitutes the burner unit 20. The supply pipe 14 supplies hydrogen gas, the pressure of which has been adjusted by the pressure adjustment unit 13, to the pipe 21 while being isolated from air. One end of the supply pipe 14 in the extension direction is joined to the pressure adjustment unit 13 without any gaps. The other end of the supply pipe 14 in the extension direction is joined to the pipe 21 without any gaps. Therefore, the hydrogen gas supplied from the pressure adjustment unit 13 to the pipe 21 is in a state of being blocked from the air. The method of joining the supply pipe 14 and the pressure adjustment unit 13 is not particularly limited as long as no gap is generated between them, and they may be joined by, for example, welding. Similarly, the method of joining the supply pipe 14 and the pipe 21 is not particularly limited as long as no gap is generated between them, and they may be joined by, for example, welding.

[0025] The cross-sectional shape of supply pipe 14 is not particularly limited, and may be, for example, a circle, an ellipse, a rectangle, a quadrangle other than a rectangle, a polygon other than a quadrangle, or an indeterminate shape, etc. The "cross section" of supply pipe 14 refers to a cross section perpendicular to the extension direction of supply pipe 14. The material of the supply pipe 14 is not particularly limited as long as it satisfies the heat resistance and pressure resistance conditions of the cassette stove 10, and may be, for example, a metal material (such as stainless steel).

[0026] In this way, by providing the supply pipe 14, the cassette stove 10 can supply hydrogen gas to the burner unit 20 without mixing it with air. This makes it possible to appropriately suppress the occurrence of flashback.

[0027] <Operation section> The operation unit 15 is, for example, a knob for operation by the user. As shown in FIG. 1, the operation unit 15 is located on the side of the housing 11, and when viewed from above and below, is disposed on the opposite side to the pressure adjustment unit 13 when viewed from the side wall of the housing 11, for example. For example, when the user rotates the operation unit 15 in a predetermined direction (for example, clockwise), hydrogen gas with adjusted pressure, supply amount, supply speed, etc. is supplied from the fuel container 100 to the burner unit 20. In addition, as shown in FIG. 1, an ignition device 16 (igniter) is disposed near the burner unit 20. For example, when the user rotates the operation unit 15 in a predetermined direction (for example, clockwise), hydrogen gas is supplied to the burner unit 20, and the ignition device 16 is pressed to generate a pulse voltage. The pulse voltage causes an electrode (not shown) located at the tip (end on the burner unit 20 side) of the ignition device 16 to discharge, and the hydrogen gas supplied to the burner unit 20 is ignited. In addition, when the user rotates the operation unit 15 in a direction opposite to the predetermined direction (for example, counterclockwise), the supply of hydrogen gas from the fuel container 100 to the burner unit 20 is stopped, and the burning hydrogen gas is extinguished.

[0028] <Burner section> The burner unit 20 mixes the hydrogen gas supplied from the supply pipe 14 with the air surrounding the burner unit 20 and combusts it. More specifically, the burner section 20 has a pipe 21 and a nozzle section 22, as shown in FIG.

[0029] (pipe) The pipe 21 is a ring-shaped pipe (tube member). Hydrogen gas is supplied to the pipe 21 from the supply pipe 14. The path shape of the pipe 21 is not particularly limited as long as it is ring-shaped, and may be any shape, such as a circle (donut shape), an ellipse, a rectangle, a quadrangle other than a rectangle, a polygon other than a quadrangle, or an indefinite shape, when viewed from above and below. In this embodiment, the description will be given on the assumption that the path shape of the pipe 21 is a circle when viewed from above and below, as shown in FIG. 1. The cross-sectional shape of the pipe 21 is not particularly limited, and may be, for example, a circle, an ellipse, a rectangle, a quadrangle other than a rectangle, a polygon other than a quadrangle, or an indefinite shape. Note that the "cross section" of the pipe 21 means a cross section perpendicular to the extension direction of the pipe 21. In this embodiment, the cross-sectional shape of the pipe 21 will be described on the assumption that it is a circle, as shown in FIG. 2. The material of the pipe 21 is not particularly limited as long as it satisfies the heat resistance and pressure resistance conditions of the cassette stove 10, and may be, for example, a metal material (such as stainless steel). The material of the pipe 21 may be, for example, the same type as the material of the supply pipe 14 to which it is joined, or may be a different type. As described above, the pipe 21 is joined to the supply pipe 14 without any gaps.

[0030] The cross-sectional areas of the supply pipe 14 and the pipe 21 may be the same or different from each other. In other words, when the cross-sectional shapes of the supply pipe 14 and the pipe 21 are both circular, the diameters of the supply pipe 14 and the pipe 21 may be the same or different from each other.

[0031] In this regard, it is sufficient for supply tube 14 to be capable of supplying hydrogen gas to pipe 21, and therefore the diameter of supply tube 14 may be relatively small. On the other hand, the pipe 21 needs to supply hydrogen gas evenly around the entire circumference of the annular pipe 21. If the diameter of the pipe 21 is small, for example, variation in the supply amount of hydrogen gas may occur in the circumferential direction (path direction) of the pipe 21. Specifically, variation in the amount of hydrogen gas discharged from the nozzle portion 22 to the outside may occur between the nozzle portion 22 (described later) provided at the position closest to the supply pipe 14 and the nozzle portion 22 (described later) provided at the position farthest from the supply pipe 14. In this regard, for example, by making the diameter of the pipe 21 relatively large, the above-mentioned variation in the nozzle portion 22 at each point can be shifted to the smaller side. From this point of view, it is preferable that the cross-sectional area (diameter) of the pipe 21 is larger than the cross-sectional area (diameter) of the supply pipe 14.

[0032] In the above description, the cross-sectional shapes of both the supply pipe 14 and the pipe 21 are circular. However, the present invention is not limited to this, and the cross-sectional shape of the supply pipe 14 (pipe 21) may be non-circular. In this case, the diameter of the supply pipe 14 (pipe 21) may be a diameter equivalent to a circle, that is, the diameter of a virtual circle according to the cross-sectional area of ​​the supply pipe 14 (pipe 21) having a non-circular cross section.

[0033] (Nozzle part) Nozzle portion 22 is provided in pipe 21 and discharges hydrogen gas inside pipe 21 to the outside. The hydrogen gas passing through nozzle portion 22 mixes with the air surrounding nozzle portion 22 to become a mixed gas, and the mixed gas is ignited by ignition device 16 to combust. As shown in FIG. 2, the nozzle portion 22 is provided, for example, on the upper portion of the pipe 21, and is exposed to the outside through the burner opening 11b as shown in FIG. In this embodiment, the nozzle portion 22 includes a plurality of (four) nozzle portions 22. The plurality of nozzle portions 22 are provided at predetermined intervals along the circumferential direction (pathway direction) of the annular pipe 21. In this embodiment, the four nozzle portions 22 are arranged at intervals of 90° along the circumferential direction (pathway direction) of the pipe 21 when viewed from above and below, as shown in Fig. 1. The number of nozzle portions 22 is not limited to four, and may be a number other than one or four. In this way, by providing the nozzle portion 22 on the pipe 21 in the cassette stove 10, it is possible to release (burn) hydrogen gas at any position in the circumferential direction (path direction) of the annular pipe 21, for example.

[0034] To explain the nozzle portion 22 in more detail, as shown in FIG. 2, the nozzle portion 22 has multiple (two in FIG. 2) first openings 23, a box body 24, one or more (one in FIG. 2) second openings 25, and a mesh member 26.

[0035] (First opening) A plurality of (two) first openings 23 are formed in the pipe 21, more specifically, in the upper portion of the pipe 21, as shown in Fig. 2. The shape of the first openings 23 is not particularly limited, and may be, for example, a circle, an ellipse, a rectangle, a quadrangle other than a rectangle, a polygon other than a quadrangle, or an indefinite shape. In this embodiment, the description will be given on the assumption that the shape of the first openings 23 is a circle. In this embodiment, the interval between two adjacent first openings 23 (the distance between the centers of the two first openings 23) may be in the range of 5 mm to 10 mm, for example. The diameter of the first openings 23 may be in the range of 0.5 mm to 1.0 mm, for example.

[0036] In this way, in the cassette stove 10, the hydrogen gas flowing from the pipe 21 toward the nozzle portion 22 is passed through the multiple first openings 23, thereby promoting turbulence of the hydrogen gas. This promotes mixing (diffusion mixing) of the hydrogen gas with the air surrounding the nozzle portion 22, and as a result, the hydrogen gas can be burned appropriately. In other words, the nozzle portion 22 having the multiple first openings 23 promotes so-called turbulent diffusion combustion.

[0037] (box body) 2, the box 24 surrounds the first openings 23 from the outside of the pipe 21, thereby blocking the first openings 23 from the outside. The box 24 is disposed above the pipe 21. The box 24 is, for example, a box with one open end, and although the shape is not particularly limited, the present embodiment will be described assuming that the box 24 is a rectangular parallelepiped. In the present embodiment, one end (open end) of the box 24 faces downward (toward the pipe 21) and is joined to the outer surface of the pipe 21 without any gaps by, for example, welding. The material of the box 24 is not particularly limited as long as it satisfies the heat resistance and pressure resistance conditions of the cassette stove 10, and may be, for example, a metal material (such as stainless steel). The material of the box 24 may be, for example, the same type as the material of the pipe 21 to which it is joined, or may be a different type.

[0038] (Second opening) One or more second openings 25 are formed in the box body 24, and more specifically, as shown in FIG. 2, are formed at the other end (corresponding to the upper end of the box body 24) of the box body 24 opposite the open end (corresponding to the lower end of the box body 24) of the box body 24. The number of second openings 25 may be any number as long as it is smaller than the number of first openings 23, and in this embodiment, since the number of first openings 23 is two, the number of second openings 25 is one. For example, when the number of first openings 23 is three, the number of second openings 25 may be one or two. As shown in FIG. 1, the second opening 25 may be located between two adjacent first openings 23 when viewed from the top-bottom direction, for example. The opening shape of the second opening 25 is not particularly limited, and may be, for example, a circle, an ellipse, a rectangle, a quadrangle other than a rectangle, a polygon other than a quadrangle, or an indefinite shape, etc. In this embodiment, the opening shape of the second opening 25 will be described on the assumption that it is a circle. The diameter of the second opening 25 may be in the range of 0.5 mm to 1.0 mm, for example.

[0039] In this manner, in the cassette stove 10, hydrogen gas that has flowed from the pipe 21 into the box 24 via the multiple first openings 23 is released to the outside from one or more second openings 25. Here, as described above, the number of second openings 25 is smaller than the number of first openings 23. This allows the hydrogen gas whose turbulent diffusion combustion has been promoted in the multiple first openings 23 to be collected in one or more second openings 25. That is, in the second openings 25, the flow rate of the passing hydrogen gas can be increased while the flow velocity of the passing hydrogen gas can be decreased compared to each of the first openings 23. As a result, the hydrogen gas can be burned stably and appropriately. In this way, in the nozzle portion 22, the hydrogen gas can be stably and appropriately burned because the turbulent diffusion combustion is promoted in the multiple first openings 23 while the hydrogen gas is concentrated in one or more second openings 25. In other words, the flame generated when the hydrogen gas is burned can have an appropriate shape and size.

[0040] (Mesh material) As shown in Fig. 2, the mesh member 26 is disposed inside the box 24. The mesh member 26 is formed, for example, by weaving wire material into a net shape, and has many fine holes. There are no particular limitations on the material of the mesh member 26, and it may be any material that satisfies the heat resistance and pressure resistance conditions of the cassette stove 10, and may be, for example, a metal material. The mesh member 26 is located between the plurality of first openings 23 and the second openings 25, and surrounds the plurality of first openings 23. An end of the mesh member 26 is joined, for example, to the outer surface of the pipe 21 by, for example, welding or the like. However, this is not limited to this, and the end of the mesh member 26 may be joined, for example, to the box body 24 by, for example, welding or the like. The mesh member 26 is pressed against the pipe 21 by the box body 24, and in the example shown in FIG.

[0041] In this way, in the cassette stove 10, hydrogen gas that has flowed into the box 24 from the pipe 21 via the multiple first openings 23 passes through the mesh member 26 and is then released to the outside from one or more second openings 25. Here, by providing the mesh member 26 in the nozzle section 22, the hydrogen gas collides with the mesh member 26, further promoting turbulence of the hydrogen gas. As a result, the combustion of the hydrogen gas (turbulent diffusion combustion) can be further promoted.

[0042] As explained above, the cassette stove 10 uses a diffusion combustion method (premixed combustion method) to isolate the hydrogen gas from the air on the path from the fuel container 100 to the burner section 20, and the hydrogen gas is mixed with the air surrounding the burner section 20 in the burner section 20 and burned. For this reason, when the premixed combustion method is used, specifically, the occurrence of flashback can be suppressed compared to when the fuel gas and air are mixed in advance in a mixing tube and the mixed gas is supplied to the burner.

[0043] In addition, the cassette stove 10 burns hydrogen gas, so it can generate high-temperature steam. Therefore, when cooking ingredients such as meat and fish on the cassette stove 10, the high-temperature steam can be used to suppress the loss of moisture in the ingredients, thereby preserving their flavor.

[0044] <<Configuration example of fuel container according to this embodiment>> Next, an example of the configuration of the fuel container 100 according to this embodiment will be described. The fuel container 100 is, for example, a small gas cylinder that contains hydrogen gas. 1, an outlet 100a is provided at one end of the fuel container 100. The outlet 100a is an opening for ejecting hydrogen gas from inside a container body 101 (described later) to the outside. More specifically, when the fuel container 100 is attached to the attachment part 12 of the portable stove 10 and the user rotates the operation part 15 in a predetermined direction (for example, clockwise), hydrogen gas is ejected from the outlet 100a of the fuel container 100, and the ejected hydrogen gas is supplied to the pressure adjustment part 13.

[0045] More specifically, the fuel container 100 has a container body 101, powder 102, and a filter 103, as shown in FIG.

[0046] <Container body> The container body 101 is, for example, a pressure-resistant container, and the shape and material thereof are not particularly limited.

[0047] <Powder> Powder 102 is contained within container body 101 and is a powder that stores (occludes) and releases hydrogen gas. By storing the hydrogen gas within container body 101 in powder 102, the pressure within container body 101 can be lowered compared to the case where hydrogen gas is sealed within container body 101 in a gaseous state. The powder 102 is preferably a powder that makes the hydrogen gas pressure (both storage pressure and release pressure) in the container body 101 less than 1 MPa at room temperature (for example, 5° C. to 35° C.). Examples of the powder 102 include powders made of metal alloys, metal complex compounds, and metal-organic frameworks, and examples of the powders include powders made of LaNi5 alloy.

[0048] The volume of the powder 102 increases by storing hydrogen gas. For this reason, in the fuel container 100, the internal volume of the container body 101 is made larger than the volume of the powder 102 when it expands by storing hydrogen gas. For example, when the internal volume of the container body 101 is 0.5×10 ―3 m 3In this case, the powder 102 made of the LaNi5 alloy may be accommodated in the container body 101 in an amount ranging from 1.5 to 2.0 kg.

[0049] In a premixed combustion type cassette stove that uses butane gas as fuel, butane gas (for example, about 250g) is liquefied and sealed inside the fuel container, keeping the inside of the container at room temperature and below a specified pressure (specifically, 1MPa). On the other hand, in the fuel container 100 of this embodiment, as described above, powder 102 is contained in the container body 101 and hydrogen gas is stored in the powder 102, so that the inside of the container body 101 can be kept at room temperature and at a predetermined pressure (specifically, less than 1 MPa).

[0050] <filter> When hydrogen gas is ejected to the outside from the nozzle 100a, the filter 103 prevents the powder 102 from flowing out of the container body 101. As shown in Fig. 1, the filter 103 is located upstream of the nozzle 100a in the ejection direction of the hydrogen gas. The filter 103 is made of, for example, wires woven into a mesh shape, and has many fine holes. The diameter of the holes in the filter 103 is smaller than the diameter of the powder 102. The material of the filter 103 is not particularly limited as long as it satisfies the heat resistance and pressure resistance requirements of the cassette stove 10, and may be, for example, a metal material.

[0051] In this way, by providing the filter 103 in the fuel container 100, it is possible to prevent the powder 102 from flowing out of the container body 101. This makes it possible to properly seal hydrogen gas in the container body 101 while keeping the inside of the container body 101 at room temperature and at a predetermined pressure (for example, less than 1 MPa). It is also possible to prevent the powder 102 from flowing into the portable stove 10 (for example, the pressure adjustment unit 13) and causing malfunctions or the like in the portable stove 10. [Explanation of symbols]

[0052] 10 Portable gas stove 11. Cabinet 11a Installation opening 11b Burner opening 11c Support part (trivet) 12 Mounting part 13 Pressure adjustment section 14 Supply pipe (corresponding to the supply section) 15 Control section 16 Ignition device (igniter) 20 Burner section 21 Pipe 22 Nozzle section 23 First Opening 24 Box body 25 Second Opening 26 Mesh material 100 fuel container 100a spout 101 Container body 102 Powder 103 Filters

Claims

1. A portable gas stove that uses hydrogen gas as fuel, a mounting portion to which a fuel container containing hydrogen gas is mounted; A burner section, a supply unit that supplies hydrogen gas in the fuel container attached to the attachment unit to the burner unit while being isolated from air, The burner unit mixes the hydrogen gas supplied from the supply unit with air surrounding the burner unit and burns the mixture.

2. a pressure adjusting unit that adjusts the pressure of the hydrogen gas supplied from the fuel container attached to the attachment unit, 2. The cassette stove according to claim 1, wherein the burner section is supplied with hydrogen gas whose pressure has been adjusted by the pressure adjustment section.

3. The burner unit includes: a circular pipe through which hydrogen gas is supplied; 2. The cassette stove according to claim 1, further comprising: a nozzle portion provided in said pipe for discharging hydrogen gas within said pipe to the outside.

4. The nozzle portion is A plurality of first openings formed in the pipe; a box body that surrounds the plurality of first openings from the outside of the pipe to block the plurality of first openings from the outside; one or more second openings formed in the box, the second openings being fewer in number than the plurality of first openings; 4. The cassette stove according to claim 3, wherein hydrogen gas flowing from the pipe into the box via the plurality of first openings is discharged to the outside from the one or more second openings.

5. The nozzle portion further includes a mesh member disposed within the box body, 5. The cassette stove according to claim 4, wherein hydrogen gas flowing from said pipe into said box body via said plurality of first openings is passed through said mesh member and then released to the outside from said one or more second openings.

6. A fuel container for supplying hydrogen gas to the cassette stove according to any one of claims 1 to 5, A container body; A fuel container comprising: a powder contained within the container body, the powder storing and releasing hydrogen gas.

7. an outlet for ejecting hydrogen gas from within the container body to the outside; 7. The fuel container according to claim 6, further comprising a filter located upstream of the outlet in a direction in which hydrogen gas is ejected, the filter preventing the powder from flowing out of the container body when hydrogen gas is ejected to the outside from the outlet.

Images