Fuel container for desktop flame device

Abstract

The invention relates to a fuel container for a desktop flame device, comprising a sponge (15) arranged at the upper end of the fuel container, in which the fuel container (7) is arranged such that liquid fuel in the fuel container (7) is delivered into the sponge (15). By means of the fuel container, the flame of the table top flame device can be burnt at a desired height in a particularly uniform manner. The invention further relates to a desktop flame device.

Description

Technical Field

[0001] The present invention relates to a fuel container for a tabletop flame device and also relates to a tabletop flame device with the fuel container. Background Art

[0002] The fuel container may be formed as a can, cartridge, bottle or cylinder. The fuel container may be made of materials such as glass, ceramic, sheet metal, other metals or suitable plastics.

[0003] The fuel container may be formed as a substantially closed container, with substantially no possibility of refilling the fuel. The fuel container may be at least partially open at its top. The fuel container may include a reclosable refill opening.

[0004] The fuel container is preferably made of stainless steel. The fuel container has reliable fire protection and can be manufactured in a technically simple manner.

[0005] Fuel is a chemical substance whose stored energy is released through combustion. Fuels are typically (bio)ethanol, alcohol, gasoline, oil, or wax. Fuels can be in liquid, solid, gel, or paste form at room temperature.

[0006] Tabletop flame devices typically have a glass cylinder housing. The flames can be set into rotation by swirling air, creating a "tornado-like" appearance that offers special visual appeal to viewers.

[0007] When using (bio)ethanol and similar fuels, flame columns are also suitable for indoor use and are primarily used for decoration, but also for relaxation, similar to the role of an open fireplace (or a fireplace flame simulated by a screen). In addition, when used in outdoor areas, such as on a terrace, tabletop flame devices can also serve as a light and heat source on cooler evenings.

[0008] WO 2020 / 069770 A1 discloses a tabletop flame device comprising a fuel container for bioethanol and similar fuels. The fuel container is open at the top. The fuel contained in the fuel container burns, producing a large, tall, spiraling flame. This is visually appealing and ensures a particularly clean combustion process.

[0009] The tabletop flame device disclosed in WO 2020 / 069770 A1 varies in the height and visibility of the flame produced during operation. Immediately after ignition, the flame is typically very small and barely visible. Only after a certain period of time, typically one to two minutes, does the flame reach the desired height and visibility. A low flame height can also occur if the fuel in the fuel container is largely depleted.

[0010] If gel is used as fuel, it can leave residue in the fuel container, which is disadvantageous. Liquid fuels, such as liquid bioethanol, can easily leak from open-top fuel containers. Furthermore, excessive soot is produced. Summary of the Invention

[0011] Against this background, the object of the present invention is to ensure a more suitable combustion process for a tabletop flame device.

[0012] To achieve the above-mentioned object, a fuel container is provided, which includes a sponge arranged at the upper end. The fuel container is arranged so that liquid fuel contained in the fuel container can be transferred to the sponge. The fuel container is arranged so that the fuel contained in the sponge can be ignited to produce a flame. Therefore, the sponge can serve as a combustion zone. This makes it possible to produce a highly uniform flame that is basically independent of the fuel level in the fuel container. Liquid fuels such as bioethanol can be used without problems through the sponge because the sponge can prevent the fuel from overflowing. Although the liquid can pass through the sponge, the sponge can still prevent overflow. The sponge can adjust the amount of fuel and thus avoid the formation of excessive soot. The fuel container with the sponge can be reproducible without requiring large technical investment.

[0013] The fuel container is liquid-tight. Therefore, liquid fuel can be stored in the fuel container for long periods of time. The fuel container includes a bottom wall and circumferential side walls. The bottom wall and / or circumferential side walls may be made of metal. For safety reasons, the bottom wall and side walls generally do not have closable openings. The bottom wall and side walls are liquid-tight and are connected to each other in a liquid-tight manner to form a liquid-tight container.

[0014] A sponge is a porous structure that absorbs and stores liquids. If placed on a substrate, the sponge generally retains at least its primary shape. This means that the sponge barely deforms under its own weight. In principle, a sponge can be elastically deformed by pressure.

[0015] The sponge can be made of a non-flammable material, such as cotton. However, it is preferred that the sponge be made of a non-flammable material in order to ensure that its appearance remains consistent over time in a particularly reliable manner. The sponge can be made of fibers made of aramid, glass (e.g., glass fiber), or metal. The sponge can be flexible, i.e., deformable, and preferably elastic. The height of the sponge can be smaller than its depth and width or its diameter. If the sponge is made of fibers, these fibers can extend in all directions. For example, in this case, there may be fibers that run essentially horizontally, and / or fibers that run essentially vertically, and / or fibers that run essentially at an angle. Thus, the fibers in the sponge can extend in different directions. The sponge can be like cotton wool. However, it is also possible that the fibers extend at least essentially only in one direction, for example, at least predominantly only in the horizontal direction.

[0016] One or more wicks may be in contact with the underside of the sponge. The one or more wicks are arranged to enable liquid fuel from the fuel container to be transferred to the sponge. The one or more wicks may be fixed to the top of the fuel container and extend into the fuel container. The one or more wicks may be fixed to a cover that at least partially covers the top of the fuel container. The one or more wicks may be fixed to the bottom of the sponge. The one or more wicks may extend to the bottom of the fuel container. The wick may extend to the bottom of the fuel container, or at least nearly to the bottom of the fuel container, so as to enable fuel to be transferred from the bottom towards the sponge.

[0017] One or more wicks can be made of the same material as the sponge. One or more wicks can be made of a different material than the sponge. Since the wick is separated from the flame by the sponge, the wick only needs to be made of a non-flammable material without any adverse effects.

[0018] A wick is an object that uses capillary forces to counteract gravity and deliver liquid fuel to the combustion zone. Wicks are typically elongated. Therefore, a wick's length is typically greater than its diameter, or its width and depth. In particular, a wick can be spun, braided, or woven, in whole or in part. The fibers of the wick can extend along the length of the wick, i.e., not transversely to it. The fibers of the wick can be interwoven and / or partially bonded to secure the fibers within.

[0019] Wicks often don't sit well on their ends. They often fall over or even collapse, similar to what would happen with a rope.

[0020] The wick may be made of plant, animal, chemical or other fibers. The wick may be formed, for example, from hemp, coconut, flax, cotton, glass, metal and / or aramid.

[0021] Generally speaking, wicks are better at moving liquid upward than sponges. This is primarily because the fibers of a wick extend from bottom to top when installed.

[0022] The diameter or width and depth of the wick are smaller than the diameter or width and depth of the sponge. Therefore, multiple wicks can be in contact with the underside of the sponge. Thus, for example, theoretically, there can be at least five, at least ten, or at least fifteen wicks in contact with the underside of the sponge. In practice, at least two or three wicks and / or no more than six wicks are in contact with the underside of the sponge to supply the sponge with the appropriate amount of fuel. Preferably, the wicks are equidistant from one another to ensure that the sponge is supplied with fuel as evenly as possible. Multiple wicks are provided, in particular when the fuel container is relatively tall, for example, with a height of at least 70 mm. For smaller fuel containers, one or two wicks are also sufficient.

[0023] In a preferred embodiment, the fibers of the wick are made of a flame-retardant material, ie a non-combustible material.

[0024] Flame retardant materials are materials that can resist the flame of a tabletop flame device, especially materials that neither burn nor melt, such as glass, minerals, metals or aramid. In particular, flame retardant materials have an operating temperature exceeding 300°C or exceeding 400°C.

[0025] It is preferred to use multiple wicks to ensure adequate fuel delivery to the sponge regardless of the fuel level. Therefore, at least two or at least four wicks are preferred. The more wicks used, the deeper the fuel container can be without adversely affecting the flame pattern.

[0026] The upper end of the wick can extend into the sponge and partially press into it, even if the sponge is partially deformed. This creates a particularly tight connection between the sponge and the wick, ensuring a particularly reliable supply of fuel to the sponge. One or more of the wicks can protrude upward relative to the adjacent area of ​​the cover. This helps the protruding end to be pressed into the sponge when installed.

[0027] The upper end of the wick may be securely connected to the sponge so that the wick can deliver fuel to the sponge.

[0028] A weight can be attached to the lower end of the wick to ensure that the wick reliably extends as far as possible to the bottom of the fuel container. The weight can be made of metal or ceramic. It can be a sleeve surrounding the wick. The sleeve can be securely connected to the wick, for example, by an interference fit. The sleeve can also improve the stability of the wick. However, wrapping a band or wire ring around the wick area can also be sufficient to improve stability.

[0029] The top of the fuel container can be substantially closed by a cover. The cover can be made of metal. The cover can be fluid-tightly connected to the side wall of the fuel container. The cover can be integrally connected to the side wall. The cover can be connected to the side wall by gluing, brazing, or welding.

[0030] The cover can include a groove-shaped receptacle for accommodating a sponge. The sponge can be inserted into the receptacle and retained therein. The shape and size of the receptacle can be adapted to the shape and size of the sponge. The sponge fits snugly against the side walls of the groove-shaped receptacle. Providing the sponge with a groove-shaped receptacle allows for particularly precise and reproducible manufacturing.

[0031] The length and width of the trough-shaped receiving portion and the length and width of the sponge can be substantially the same. The height of the sponge can be smaller than the height of the trough-shaped receiving portion, so that the sponge and the fuel contained therein can be particularly securely retained within the trough-shaped receiving portion. This also facilitates refilling the fuel container with liquid fuel.

[0032] In a top view, the trough-shaped receiving portion and / or the sponge may be circular. The inner diameter of the trough-shaped receiving portion and the outer diameter of the sponge may be substantially the same. The sponge is in a dry state. As the sponge becomes saturated with liquid, it may increase in volume. In this case, the sponge can compensate for any tolerances and conform to the shape of the trough-shaped receiving portion. Therefore, the volume of the sponge depends on whether the sponge is dry or saturated with liquid.

[0033] The cover can be stepped from the outside inwards to form a trough-shaped receiving portion. For safety reasons, the combustion zone preferably does not extend to the entire top of the fuel container.

[0034] A planar, liquid-permeable component may be placed above the sponge to hold the sponge within the trough-shaped receiving portion. The liquid-permeable component may be a grid or screen, such as a perforated metal plate, mesh fabric, or woven fabric. The sponge may be held within the trough-shaped receiving portion by the grid, screen, mesh fabric, or woven fabric. The grid or screen may be made, for example, of ceramic or metal. The mesh fabric or woven fabric may be made, for example, of metal or fiberglass.

[0035] A grid is a geometric structure formed by intersecting wires or rods that form a regular pattern of evenly spaced, mostly square or rectangular cells.

[0036] A screen is a surface-like component with holes that can be used to separate solids from liquids or other solids. A screen can include a flat frame that is stretched with, for example, a fine-mesh grid or perforated metal or mesh fabric.

[0037] Perforated metal is a sheet of metal with holes drilled into it. These holes can be arranged in a regular pattern. They can be circular, square, rectangular, or other shapes, with varying diameters or spacing. The holes can also be punched in various patterns and arrangements to create a variety of effects.

[0038] Mesh fabrics are made of interwoven threads, cords, ribbons, or other flexible materials.

[0039] A braid is a fabric or mesh made of interwoven threads, cords, ribbons, or other flexible materials. Braids are created by interlacing horizontal and vertical threads, typically passing alternately over and under each other, to create a stable, flexible, and load-bearing material. Braids can be made of metal or fiberglass.

[0040] The liquid-permeable component can be fastened to the cover above the sponge to provide particularly secure support for the sponge. The liquid-permeable component can be connected to the cover by a material connection, a form-fitting connection, or a force-locking connection. Preferably, the liquid-permeable component is fastened to the cover by a snap-fit ​​connection. A snap-fit ​​connection is a form-fitting connection between the liquid-permeable component and the cover that is established by snapping or inserting. The connection can be released again, for example, by rotating or pressing. However, for safety reasons, the snap-fit ​​connection is preferably only releasable by breaking or using a tool.

[0041] The liquid-permeable component may include one or more elastically deformable bent tongues, which may be part of the snap-fit ​​connection. The one or more bent tongues may be arranged along an edge of the liquid-permeable component. The one or more bent tongues may protrude obliquely outward from the edge. The cover may include an opening having a diameter or size slightly smaller than the diameter or size of the edge of the liquid-permeable component. The liquid-permeable component may be placed (inserted) into the opening such that the one or more bent tongues initially bend inwardly to ultimately snap into place behind the edge of the opening. In this manner, the liquid-permeable component can only be disconnected again by breaking or using a tool.

[0042] The liquid-permeable component can be inserted into the channel-shaped receiving portion. The channel-shaped receiving portion can include an opening with an edge, and one or more bent tongues can be placed (clicked) behind the edge.

[0043] The trough-shaped receptacle can be manufactured from exactly two parts, so that the aforementioned opening with an edge can be produced with minimal technical effort. The two parts can be connected to one another by a material connection, i.e., for example, by soldering or welding. The two parts can also be connected to one another by screws or rivets.

[0044] However, the trough-shaped receptacle can also be formed in one piece, ie produced in one working step.The trough-shaped receptacle can be produced from more than two parts.

[0045] The cover may have an opening corresponding to each wick, through which the wick can pass. The opening may be provided at the bottom of the groove-shaped receiving portion. The diameter or cross-section of the opening may be adapted to the diameter or cross-section of the wick, respectively.

[0046] The upper side of the wick can be provided with a support frame, which holds the wick in place on the cover. The support frame can be a sleeve with an annular widening. The annular widening can be provided on the upper side of the cover to hold the wick. The annular widening can, for example, be placed at the bottom of the groove-shaped receiving portion.

[0047] A weight can be secured to the lower end of the wick to ensure the wick reliably extends as far as possible to the bottom of the fuel container. The weight can be made of metal or ceramic. It can be a sleeve surrounding the wick. The sleeve can be securely connected to the wick, for example, by an interference fit or by being clamped in place.

[0048] Alternatively or additionally, the wick and the sponge can be arranged in such a way that the wick is pressed towards the bottom by the sponge.

[0049] The sleeve may be funnel-shaped with one end widened so that the wick can be reliably and easily pressed into the sleeve and ultimately fully pulled through. The inner diameter or cross-section of the sleeve may be slightly smaller than the outer diameter or cross-section of the wick so that the sleeve can be connected to the wick by clamping.

[0050] The trough-shaped receptacle comprises a bottom wall and circumferential side walls. One or more refill openings may be provided in the bottom wall and / or the side walls for refilling the fuel container with liquid fuel. The one or more refill openings may be elongated holes. The one or more refill openings may be circular. Preferably, refill openings for refilling are provided in both the side walls and the bottom wall to enable particularly safe refilling. The refill openings are not closed by a wick or other element. For safety reasons, the one or more refill openings are preferably covered by a sponge. For safety reasons, it is advantageous to omit a cap for closing the refill opening.

[0051] The distance between the sponge surface and the refill port through which liquid flows into the container can be as short as possible to reduce flow resistance. For example, the distance between the sponge surface and the refill port can be less than 5 mm or less than 3 mm. For example, the distance between the sponge surface and the refill port can be greater than 1 mm.

[0052] The fuel container can be provided with supports for a cover on its outer edge. Typically, three supports are provided, and they can be evenly spaced apart. The cover can be placed on the supports, enclosing the flame. For example, if the fuel container has a circular cross-section, the cover can be cylindrical. However, if the fuel container has a square cross-section, the cover can also have a square cross-section. The cover can be made of glass to allow the flame to be visible. However, it can also be made of a grille or perforated metal sheet to allow at least partial visibility of the flame. The cover can also be made of another non-combustible material, such as metal or ceramic. This allows the production of a tabletop flame device with particularly low technical effort: a small flame device that can be placed on a table to create a cozy atmosphere or to heat a room. Such a tabletop flame device can be used both indoors and outdoors.

[0053] However, the fuel container can also be used for a tabletop flame device with which a swirling flame can be generated, as disclosed in DE 20 2019 005 839 U 1. In this patent, the tabletop flame device is referred to as a flame column.

[0054] A vortex flame is a spiral flame formed by causing air to spin. This tabletop flame device may include an airflow guide element, which may be surrounded by a housing. The airflow guide element may be arranged between the housing and the base. The airflow guide element may extend helically, so that air flowing in from below is caused to spin, forming a vortex flame.

[0055] The outer cover is the outer casing of a tabletop flame device. The outer cover is open at the top and bottom, but preferably forms an at least substantially closed barrier over the entire area of ​​the flame, preventing horizontal exchange with the air outside the cover. The outer cover may not have openings in the area of ​​the flame that allow air to flow through. The outer cover forms a completely closed barrier in the horizontal direction. In particular, the cover may be transparent or light-transmissive, or include transparent or light-transmissive sections. In principle, the outer cover is made of a single component and is manufactured integrally in a single working step to keep the number of parts small.

[0056] The outer cover can be made of multiple parts. In this case, the outer cover can be made of different materials. For example, at the height of the flame, the outer cover can be made of glass so that the flame is visible. Below the flame, the outer cover can be made of metal.

[0057] For example, the housing can be designed as a round glass cylinder or a metal cylinder with a glass opening. Furthermore, almost any other shape is possible, whether square, convex, conical, concave, elongated, compressed, symmetrical, asymmetrical, or irregular. However, if a particularly uniform flame pattern is to be produced, a circular diameter is preferred. The housing can be constructed of any non-combustible material or material mixture, including clear, frosted, tinted, or dyed glass, smoked glass, metal, or ceramic.

[0058] The base is a block located in the lower area of ​​a tabletop flame device, which is typically used to mount or accommodate a fuel container and / or serve as a support for the housing. In particular, the base can be formed as a base, or include a base, a ground spike, or other fixing member. The base can be connected to or connected to a base or a ground spike. The base can be made of a single element and manufactured integrally in a single working step to keep the number of parts small. However, the base can also be formed of multiple parts, which are assembled to form the base.

[0059] The base may be adapted to fully or partially receive or to be connected directly or indirectly to a fuel container.

[0060] The main part of the outer cover can be arranged above the base. The lower end of the outer cover can partially or completely surround the base from the side.

[0061] An airflow guide element is a structural element used to deflect the airflow generated by the flame's heat, causing the flame to rotate. This in turn forms a vortex flame. A vortex flame has a shape similar to a spiral. Specifically, the airflow guide element can be formed as a straight or curved, closed or semi-open channel. It can include flat or curved surfaces. It can be made of sheet metal. The airflow guide element can interact with other elements of the tabletop flame device to guide air, enabling the formation of a vortex flame. These other elements can be the housing and / or the base. Specifically, the airflow guide element can be integrated into or fixed to the base or housing. When installed, the airflow guide element preferably forms an acute angle with the horizontal plane. The airflow guide element is only slightly tilted relative to the horizontal plane.

[0062] The fuel container may have a maximum diameter of 400 mm, 300 mm, 200 mm, or 100 mm. The fuel container may have a minimum diameter of 30 mm, 40 mm, or 50 mm. If the fuel container is not circular in plan view, the same applies to the width and depth. The fuel container may have a minimum height of 40 mm or 50 mm. The fuel container may have a maximum height of 200 mm or 100 mm.

[0063] The sponge may be a maximum of 50 mm, or a maximum of 40 mm, or a maximum of 30 mm, or a maximum of 20 mm. The sponge may have a minimum height of at least 5 mm, or at least 10 mm. The sponge may have a diameter, depth, and width of at least 20 mm, or at least 40 mm, or at least 50 mm. The sponge may have a diameter, depth, and width of no more than 150 mm, or no more than 100 mm, or no more than 70 mm.

[0064] The one or more wicks may be at least 4 cm or at least 6 cm long. The one or more wicks may be up to 20 cm or 15 cm long. The one or more wicks may have a diameter or depth and width of at least 3 mm or 5 mm. The one or more wicks may have a diameter or depth and width of no more than 20 mm or no more than 15 mm or no more than 10 mm.

[0065] Tabletop flame devices with fuel containers may be at a maximum height of 150 cm, a maximum height of 100 cm, or a maximum height of 80 cm. Tabletop flame devices with fuel containers may be at a minimum height of 20 cm, a minimum height of 30 cm, or a minimum height of 50 cm.

[0066] As fuel, alcohols such as ethanol or bioethanol may be used.

[0067] For safety reasons, the flash point of the fuel is at least 50°C, at least 80°C, or at least 100°C. For practical reasons, the flash point of the fuel is preferably no higher than 150°C or no higher than 120°C. Thus, ethylene glycol, propylene glycol, or a mixture of ethanol and propylene glycol and / or ethylene glycol can be used as the fuel. In this case, the flash point of the fuel is approximately 105°C.

[0068] According to DIN V 14011, the flash point of a substance is the lowest temperature at which a flammable vapor-air mixture can form.

[0069] The fuel container may include one or more annular disks that can be loosely placed on the upper side of the fuel container. One or more annular disks have openings. If multiple annular disks are used, the openings may be of different sizes. In particular, the annular disks may be placed above a planar, liquid-permeable component. A distance may be provided between the annular disks and the planar, liquid-permeable component. This allows the annular disks to maintain a relatively low temperature and to cause little or no evaporation of the fuel. By positioning the annular disks, the height of the flame can be varied. If multiple annular disks are used, flames of different heights can be set. If the annular disks are arranged to maintain a relatively low temperature, the height of the flame can be permanently reduced. Consequently, the burning time can be extended.

[0070] Each annular disk may include a protruding ring opening, through which the position of the annular disk can be fixed. The ring opening may be arranged on the inner side of the annular disk.

[0071] If the annular disk has an inner ring opening protruding downward in the installed state, the inner ring opening can further effectively limit the height of the flame. The ring opening can be arranged not to be used for supporting and fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Next, the present invention will be described in more detail with reference to the accompanying drawings.

[0073] Figure 1 A tabletop flame apparatus is shown.

[0074] Figure 2 A cross-sectional view of a fuel container is shown.

[0075] Figure 3 Show Figure 2 The fuel container is shown in a sectional view rotated through 90°.

[0076] Figure 4 Show Figure 2 A top view of a fuel container is shown.

[0077] Figure 5 Show Figure 2 A perspective view of the various components of a fuel container is shown.

[0078] Figure 6 Show Figure 2 A perspective view of a fuel container is shown.

[0079] Figure 7 Another embodiment of a fuel container is shown.

[0080] Figure 8 Shows a Figure 7 Tabletop flame apparatus with fuel container shown.

[0081] Figure 9 Show Figure 8 A cross-sectional view of the tabletop flame apparatus is shown.

[0082] Figure 10 A cross-sectional view shows another embodiment of a fuel container.

[0083] Figure 11 Another embodiment of a tabletop flame device is shown.

[0084] Figure 12 Components of another embodiment of a fuel container are shown.

[0085] Figure 13 Shown with Figure 12 Another embodiment of a fuel container of the components is shown.

[0086] Figure 14 A cross-sectional view shows another embodiment of a fuel container.

[0087] Figure 15 Show Figure 14 A perspective view of another embodiment of a fuel container is shown.

[0088] Figure 16 Shows a Figure 14 and Figure 15 Tabletop flame apparatus with fuel container shown.

[0089] Figure 17 Shown are components of a fuel container with a wick bundle.

[0090] Figure 18 Shown including Figure 17 The components of a fuel container are shown.

[0091] Figure 19 A fuel container with a wire is shown.

[0092] Figure 20 An annular disk is shown.

[0093] Figure 21 Show Figure 20 A side view of the annular disk is shown.

[0094] Figure 22 A sectional view of the annular disk is shown in the installed state.

[0095] Figure 23 Another embodiment of a fuel container is shown.

[0096] Figure 24 Another embodiment of a fuel container is shown.

[0097] Figure 25 Show Figure 24 A cross-sectional view of a fuel container is shown. DETAILED DESCRIPTION

[0098] Figure 1A tabletop flame device 1 is shown, which may include an outer housing 2 and a base 3. The outer housing 2 and / or base 3 may be manufactured integrally. The outer housing 2 and / or base 3 may be manufactured from two or more components, which are assembled together. The base 3 may be configured to allow a fuel container to be placed or inserted into the base 3. Alternatively, the base 3 may be a fuel container. An airflow guide element 4 may be provided on the outside of the base 3. The airflow guide element 4 may extend spirally around the outside of the base 3 to generate a swirling flame. The airflow guide element 4 may form an angle with the horizontal plane of less than 60° or less than 45°. The airflow guide element 4 may form an angle with the horizontal plane of greater than 5° or greater than 10°. Specifically, three or four airflow guide elements 4 may be provided. The airflow guide element 4 may be in the form of a strip. The airflow guide element 4 may be manufactured by cutting, for example, from a metal plate. The airflow guide element 4 may be fixed to the outside of the base 3 and / or the inside of the outer housing 2. For example, the airflow guide element 4 is secured by material connection such as brazing, welding, or gluing. The airflow guide element 4 can be manufactured integrally with the base 3 and / or the outer cover 2. For example, the base and the airflow guide element 4 can be a single casting. For example, the outer cover 2 and the airflow guide element 4 can be manufactured from glass in a single working step. The outer cover 2 can be composed of two parts. The lower portion of the outer cover 2 can be manufactured integrally with the airflow guide element 4.

[0099] Below the air flow guide element 4, a protrusion 5 is provided on the base 3, which can serve as a support for the outer cover. For example, the protrusion 5 can be constructed as a pin 5. Thus, the outer cover 2 can be placed or rested on the protrusion 5. Air can flow into the outer cover 2 from below through the protrusion 5. The outer cover 2 can be detachably placed on the protrusion 5 or fixed on the protrusion 5. For the outer cover 2, a three-point support is preferred. Specifically, three protrusions 5 or three supports are provided. The protrusion 5 can be connected to the base 3 in one piece, that is, manufactured in one working step. The protrusion 5 can be manufactured separately from the base 3 and then connected to the base 3. The protrusion 5 can be connected to the base 3 by methods such as bonding, welding, brazing, riveting or screwing.

[0100] The base 3 can be connected to a plate 6 on the underside, which serves as a base. The base 3 and / or the plate 6 and / or the protrusion 5 can be made of metal and / or stone and / or plastic and / or ceramic and / or cement and / or concrete and / or glass, for example. The plate 6 and the base 3 can be screwed, glued, riveted, brazed or welded. The plate 6 can be connected to the base 3 in one piece, i.e. manufactured in one piece. If the protrusion 5 is not provided, the underside of the outer cover 2 can be provided with holes or recesses through which air can flow into the outer cover 2. Preferably, the holes or recesses are provided below the airflow guide element 4. The outer cover 2 can be placed detachably on the ground or on the plate 6. The outer cover 2 can be connected to the plate 6.

[0101] Figure 2 A fuel container 7 is shown, comprising a bottom wall 8 and circumferential side walls 9. Bottom wall 8 forms the bottom of fuel container 7. Bottom wall 8 and circumferential side walls 9 form a liquid-tight container. Bottom wall 6 and / or side walls 9 can be made, for example, of metal, glass, stone, cement, concrete, or plastic. Bottom wall 6 and / or side walls 9 can be made from a single piece of material to avoid sealing issues. Bottom wall 6 and / or side walls 9 can also be made from multiple materials that are subsequently assembled together.

[0102] A sponge 15 may be provided at the top end of the fuel container 7. One or more wicks 10 may be in contact with the underside of the sponge 15. One or more wicks 10 may extend to the bottom of the fuel container 7, i.e., toward the bottom wall 8. The wicks 10 may contact the bottom wall 8 of the fuel container 7 to transfer fuel from the bottom to the sponge 15.

[0103] The upper end 11 of each wick 10 can extend into the sponge 15 and partially press into the sponge 15. A weight can be fixed to the lower end of each wick 10. The weight can be a sleeve 12 surrounding the wick 10.

[0104] The top of the fuel container 7 can be substantially closed by a cover 13. The cover 13 can be connected to the side wall 9 of the fuel container 7 in a liquid-tight manner. The cover 13 can be arranged inwardly to avoid accidental spillage of liquid fuel, for example during refilling. The cover 13 is spaced apart from the upper edge of the side wall 9. The spacing can be at least 1 mm or at least 2 mm. The spacing can be no more than 10 mm or no more than 5 mm. The cover can be folded upwards circumferentially at the edge. The circumferential bend 14 can be connected to the inner wall of the side wall 9 by a material connection, such as by, for example, brazing, welding or bonding.

[0105] The cover 13 may include a groove-shaped receiving portion 16 for receiving a sponge 15. The sponge 15 may be placed in the receiving portion 16 and retained therein. The shape and size of the receiving portion 16 may be adapted to the shape and size of the sponge 15. The side surfaces of the sponge 15 may abut against the side walls of the groove-shaped receiving portion 16. The sponge 15 may be placed at the bottom of the groove-shaped receiving portion 16.

[0106] The height of the sponge 15 can be smaller than the height of the trough-shaped receptacle 16, so that the sponge 15 and the fuel contained therein can be held particularly reliably within the trough-shaped receptacle 16. This can also facilitate refilling the fuel container with liquid fuel.

[0107] The cover 13 may be stepped from outside to inside to form a groove-shaped receiving portion 16. There is a distance between the side walls 9 of the groove-shaped receiving portion 16.

[0108] A planar liquid-permeable member may be provided above the sponge 15 to hold the sponge 15 in the groove-shaped receiving portion 16. The liquid-permeable member may include a mesh 17. The sponge 16 may be held in the groove-shaped receiving portion 16 by the mesh 17.

[0109] One or more elastically deformable bent tongues 18 can be provided at the edge of the screen 17. The one or more bent tongues 18 can protrude obliquely outward from the edge of the screen 17.

[0110] The cover 13 may include an opening 19, the diameter or size of which is slightly smaller than the diameter or size of the edge of the screen 17. The screen 17 can be inserted into the opening 19. One or more bent tongues 18 can be elastically bent inwards to snap in behind the edge of the opening 19. After this, the screen 17 can only be removed from the groove-shaped receptacle 16 by breaking it or using a tool. Thus, the screen 17 can be inserted into the groove-shaped receptacle 16 and locked therein. One or more bent tongues 18 snap in behind the edge of the opening 19.

[0111] like Figure 2 As shown, the trough-shaped receptacle 16 can be produced from two parts in order to be able to produce the opening 19 with the aforementioned edge with little technical effort.

[0112] The cover 13 may be provided with an opening 24 corresponding to each wick 10. Each wick 10 may pass through an opening 24. Each opening 24 may be provided at the bottom of the groove-shaped accommodating portion 16. The diameter or cross-section of the opening 24 may be adapted to the diameter or cross-section of the corresponding wick 10. The diameter of the wick 10 may be greater than 1 mm, greater than 2 mm, or greater than 3 mm. The maximum diameter of the wick 10 may be 20 mm, 15 mm, or 10 mm. The diameter of the opening 24 is similar to the diameter of the wick 10. Specifically, three wicks 10 or four wicks 10 may be provided. The spacing between the wicks 10 may be equal.

[0113] The upper side of the wick 10 can be provided with a support frame, by which the wick 10 can be held on the cover. The support frame can be a sleeve 20 with an annular widening 21. The annular widening 21 can be placed on the upper side of the bottom of the groove-shaped receiving portion 16 to hold the wick 10.

[0114] Each sleeve 12 , 20 may be funnel-shaped with a widening at one end, ie, form a funnel 22 , so that the wick 10 can be pressed into the sleeve 12 , 20 reliably and easily and finally pulled out.

[0115] The groove-shaped receiving portion 16 includes a bottom wall and a circumferential side wall. The bottom wall and / or the side wall may be provided with one or more refill ports 23 for refilling the fuel container 7 with liquid fuel. Figure 2In the figure, one can see a refill port 23 provided in the side wall of the groove-shaped receiving portion 16. One or more refill ports 23 may be elongated holes. For safety reasons, one or more refill ports are preferably covered only by the sponge 15. In addition, the refill port 23 is not closed or covered by the wick 10 or other components.

[0116] The refill opening 23 in the side wall enables rapid refilling. The refill opening 23 in the bottom wall, ie in the bottom of the trough-shaped receiving portion 16, ensures that the fuel that has seeped through the sponge 15 can further enter the fuel container 7.

[0117] Figure 3 Show Figure 2 The fuel container 7 is shown in a sectional view after being rotated by 90°. It can be seen that one or more refill openings 23 can also be arranged in the bottom wall of the trough-shaped receptacle 16, ie at the bottom.

[0118] Figure 4 Show Figure 2 A top view of the fuel container is shown. The screen 17 may be provided with a marking "MAX" which may indicate the maximum filling height of the fuel. The cover 13 may be provided with a vent hole 25 which is very small to prevent leakage of the liquid fuel. The diameter of the vent hole 25 may be less than 3 mm or less than 2 mm. The diameter of the vent hole 25 is at least 0.5 mm or at least 1 mm. To prevent the flame from burning back into the tank (flammable ethanol / air mixture), the diameter of the vent hole 25 is set to less than 1 mm.

[0119] Figure 5 Shown to be assembled by shape locking Figure 2 A perspective view of the various components of the fuel container 7 is shown. Figure 5 It can be seen from the figure that, for safety reasons, the refill port 23 provided on the side wall of the groove-shaped receiving portion 16 can be limited to the lower half of the side wall.

[0120] Figure 6 A perspective view of a fuel container is shown, wherein Figure 5 The components are shown assembled.

[0121] Figure 7Another embodiment of a fuel container 7 is shown. The lower part of the side wall 9 can be separated from the upper part of the side wall 9, for example, by a step 26. As a result, the lower diameter of the fuel container can be much wider than the upper diameter, so that the fuel container has a low center of gravity. As a result, the fuel container 7 can be placed very stably and can accommodate large amounts of liquid. An air flow guide element 4 is mounted on the upper part of the side wall 9, which air flow guide element 4 integrates a support 5 for the outer cover. The support 5 can be formed by a stepped widening 5. For example, a closable filling opening 27 for the fuel can be provided on the step 26. In this way, it is ensured that liquid fuel can only be filled into the fuel container 7 to the height of the filling opening 27. A particularly low center of gravity is thereby ensured. Otherwise, the fuel container 7 can be as Figures 2 to 6 The fuel container is constructed as shown.

[0122] Figure 8 2 shows a fuel container 7 with a cover 2. This provides a tabletop flame device capable of generating a swirling flame. The cover 2 rests on a support 5. A gap is provided between the underside of the cover 2 and the step 26, through which air can flow to the airflow guide element 4.

[0123] Figure 9 Show Figure 8 A cross-sectional view of the tabletop flame apparatus is shown. Figure 9 Additionally shown is a fire extinguishing cap 28 which can be placed on the fuel container 7 via a rope 29 secured to the cap 28 so that the flame can be extinguished. This further prevents emissions from fuel evaporation. "The tank will not run dry."

[0124] Figure 10 A cross-sectional view shows another embodiment of a fuel container 7. The height of the fuel container 7 is smaller than its diameter, resulting in a low center of gravity. This ensures particularly stable placement. The underside of the fuel container 7 has support points 30, for example, three or four, to ensure stable placement even on uneven surfaces. Adjacent support points 30 can be evenly spaced. The support points 30 can be arranged near the periphery to ensure stable support. Because the fuel container 7 can be relatively small, one or two wicks 10 are sufficient to fully supply fuel to the sponge 15. For such a fuel container 7, the diameter of the cap 13 or the depth and width of the cap 13 can be at least 50% or at least 80% larger than the diameter or depth and width of the sponge 15. A vent hole can be provided in the groove-shaped receiving portion 16, above the refill port. The diameter of the one or two wicks can be 5 to 15 mm, for example, 10 mm.

[0125] Figure 11 Another embodiment of the tabletop flame device 1 is shown. The fuel container 7 corresponds to Figure 10 The fuel container 7 shown differs in that a pin 5 protrudes from the side wall 9. The cover 2 is placed on the pin 5 and inserted into a cutout 32 provided on the upper side of the pin. The cover is securely held by the cutout 32.

[0126] The extinguishing cover 28 has a raised edge 31 which can be placed on the edge of the opening 19. The interior of the extinguishing cover 28 adjoining it projects into the opening 19. A flame can thus be extinguished particularly quickly and reliably.

[0127] Support members of other shapes may also be provided instead of the pin 5, for example, a plate-shaped support member.

[0128] Figure 12 A perspective view showing the various components of another fuel container. The fuel container includes Figure 12 In the illustrated component, the sponge has a channel 33 through which the upper end of the wick 10a can pass. Preferably, a clearance fit is provided between channel 33 and wick 10a. However, a slight clearance fit or interference fit is also possible. Wick 10a can be longer than the other wicks 10. Wick 10a can be long enough to extend to the bottom of the fuel container and pass through sponge 15 into a wick-compatible protrusion 34, which is located on screen 17. This fuel container design is particularly suitable for using fuels with high flash points, such as those with flash points greater than 90°C or 100°C, because protrusion 34 easily comes into contact with the ignition flame and is therefore easily heated to a higher temperature. Protrusion 34 can be cylindrical, a shape well suited for wicks. However, sponge 15 can also extend into protrusion 34 instead of a wick. In this case, protrusion 34 can also have other shapes, such as a small hill.

[0129] However, it is preferred that the wick 10a extends into the projection 34, since the wick generally allows fuel to be transported from bottom to top through the wick better than the sponge 15.

[0130] On the surface of screen 17 or another planar liquid-permeable component, a plurality of protrusions 34 can also be provided to facilitate ignition. In this way, relatively inflammable fuels, such as propylene glycol or ethylene glycol, can also be used as fuel.

[0131] include Figure 12 The fuel container of the components shown is optimized for use with relatively inflammable fuels. The refill port 23 on the side can be Figure 5 The side refill port 23 shown in FIG is large and will not cause problems. Figure 5In this case, for safety reasons, the side refill port is only half the height of the side wall of the groove-shaped receiving portion 16 and contacts the bottom wall of the groove-shaped receiving portion. Therefore, for safety reasons, the side refill port 23 can be set in the lower half of the side wall of the groove-shaped receiving portion 16. Figure 5 As shown, the refill port for refilling located in the side wall of the groove-shaped receiving portion 16 may be limited to the lower half of the side wall.

[0132] If the higher safety requirements can be waived due to the use of relatively inflammable liquid fuels, the lateral refill opening 23 can extend at least substantially along the entire height of the side wall of the trough-shaped receptacle 16, as shown in FIG. Figure 12 As shown. Figure 5 Compared with the situation shown, the spacing between the two side refill ports 23 can also be very small without problems. In this case, the hole 25 can also be omitted.

[0133] exist Figure 13 It is shown in Figure 12 A cross-sectional view of the assembled fuel container 7 is shown.

[0134] Figure 12 and Figure 13 Even if the fuel container shown in FIG. 1 does not include a sponge, it is particularly advantageous when using fuels with a high flash point, such as those with a flash point greater than 90°C or greater than 100°C, that are relatively difficult to ignite. In this case, multiple wicks 10a can be provided, extending into the metal projections 34. The projections 34 facilitate ignition of the relatively difficult-to-ignite fuel.

[0135] exist Figure 14 A cross-sectional view of another embodiment of the fuel container 7 is shown in FIG. Figure 15 A perspective view of the fuel container 7 is shown in FIG. The fuel container 7 has a circumferential groove 35 into which the cover 2 can be inserted. In this embodiment, the screen 17 can be located at the same height as the maximum filling height of the fuel in the fuel container or slightly higher. Nevertheless, a very stable container with a low center of gravity can be provided. The cover 2 can be held very securely. In order to enable filling, the following can be provided: Figure 4 Exhaust holes shown.

[0136] An airflow guide element 4 may be fixed to the inner side of the groove 35. Figure 14 As shown, the inner side of the groove 35 can protrude upward relative to the outer wall 9 and the adjacent surface 37. The airflow guide element can extend helically to the entire height of the inner side of the groove 35 in order to generate sufficient air vortexes and to keep the inserted cover sufficiently stable. The cover can be placed on the protrusion 5 of the airflow guide element 4.

[0137] Fuel container 7 may include an inner container 36. For thermal insulation purposes, inner container 36 may be spaced apart from side wall 9 and bottom wall 8, as shown. Inner container 36 may be supported on bottom wall 8 by feet 38. Inner container 36 may contain fuel. By providing inner container 36, the fuel container 7 is improved in preventing fuel leakage.

[0138] The inner container 36 can be manufactured in one piece from a metal sheet. The circumferential groove including the surface 37 can also be manufactured in one piece from a metal sheet. The two parts can be connected at the edge by a material connection and are also connected to the side wall 9.

[0139] exist Figure 16 Shown in Figure 14 and Figure 15 Tabletop flame device with fuel container 7 shown.

[0140] exist Figure 17 , shows components of a fuel container comprising a bundle of multiple wicks 10, replacing a sponge. The wicks 10 can contact one another. The bundle's cross-section can be adapted to the shape and size of an opening 19. The bundle's cross-section can be adapted to the shape and size of opening 19 so that when the bundle is inserted into opening 19, it is held there by friction. The bundle can contact a grid 17. Grid 17 can be made of metal. In the installed state, the grid restrains the wicks 10 in an upward direction. In the installed state, grid 17 can be secured by form-locking, force-locking, and / or material connection. The fuel container assembled from these components is particularly suitable for using fuels with a flash point greater than 90°C or greater than 100°C. For safety reasons, fuels with a high flash point are preferred. When the wicks 10 contact grid 17, the metal grid supports ignition of the fuel.

[0141] Instead of a bundle, only one wick can also be provided. A wick can have a particularly large diameter.

[0142] Instead of a grid, other metal elements can be provided, with one or more wicks in contact with these elements to facilitate ignition. For example, these elements can be one or more metal wires. The wires can be crossed. Such elements not only facilitate ignition but also subsequent evaporation, thus assisting combustion.

[0143] exist Figure 18 It is shown in Figure 18 The components shown are assembled into a fuel container 7.

[0144] exist Figure 191 shows a fuel container 7 which does not include a sponge but only includes a wick 10. The wick 10 contacts a wire 39 made of metal. The wire 39 helps ignite and evaporate the fuel. Therefore, the fuel container 7 is suitable for using fuels with a high flash point.

[0145] The fuel container may be substantially open upwards. This is particularly suitable when using fuels with a high flash point, for example fuels with a flash point of at least 90°C or at least 100°C.

[0146] exist Figure 20 and Figure 21 An annular disk 40 is shown, which can be loosely placed on the upper side of the fuel container. The annular disk 40 can be placed on the cover 13. If the cover 13 is stepped, the annular disk 40 can be placed on the highest step of the cover 13 to maintain a relatively low temperature. The annular disk 40 has an opening 41, which can be smaller than the opening 19 of the fuel container 7. The diameter of the annular disk 40 can be larger than the opening 19 so that it can be placed on the edge of the opening 19. The annular disk 40 can be placed above a planar, liquid-permeable component. In this case, there is a distance between the annular disk 40 and the planar, liquid-permeable component of the fuel container. This ensures that the annular disk 40 maintains a relatively low temperature and does not, or barely, promote the evaporation of the fuel. The annular disk 40 can be, for example, circular or square. The opening 41 can be, for example, circular or square. The opening 41 can be arranged in the center.

[0147] The annular disc 40 may include a protruding annular opening 42. If the annular opening 42 protrudes downward in the placed state (installed state), the annular opening 42 may further contribute to the limitation of the flame height.

[0148] The position of the annular disc 40 can be fixed, for example, by the side wall 9 of the fuel container or by a circumferential bend 14 to limit lateral sliding and achieve fixation. Therefore, the ring 42 does not necessarily contribute to fixation, but can only be used to limit the flame height in an adjustable manner.

[0149] Figure 22 A cross-sectional view shows the annular disk 40 in the installed state. There is a significant gap between the annular opening 42 and the sidewalls of the groove-shaped receiving portion 16. Therefore, the annular opening 42 does not prevent lateral slippage. Instead, this is achieved by the circumferential bend 14. Because the annular opening 42 extends downward, it helps limit the flame height. The annular disk 40, including the annular opening 42, is spaced significantly apart from the screen 17.

[0150] Figure 23 An embodiment of a fuel container 7 without a sponge is shown. The wick 10 projects upwards into the groove-shaped receptacle and contacts the crossed wires 39. This embodiment is particularly suitable for using fuels with a high flash point, such as those with a flash point of more than 90° C. or more than 100° C.

[0151] Figure 24 An embodiment of a fuel container 7 is shown which can be made without a sponge. The upper side of the fuel container 7 is formed by a flat screen or mesh 40 with upwardly projecting projections 34. The wick 10 can be inserted into the projections 34. Such a fuel container is very suitable for using fuels with a high flash point.

[0152] exist Figure 25 Shown in Figure 24 sectional view of the fuel container 7.

Claims

1. A fuel container comprising a sponge (15), wherein the sponge (15) is placed at the upper end of the fuel container, wherein: The fuel container (7) is arranged so that the liquid fuel in the fuel container (7) is transferred to the sponge (15).

2. The fuel container according to claim 1, characterized in that One or more wicks (10) are provided, said wicks being in contact with the underside of the sponge (15).

3. The fuel container according to the preceding claim, characterized in that One or more wicks (10) are fixed to the cover (13) of the fuel container (7).

4. The fuel container according to any one of the two preceding claims, characterized in that One or more of the wicks (10) are pressed into the sponge (15).

5. A fuel container according to any one of the three preceding claims, characterized in that At least one or at least three of the wicks (10) are provided in contact with the lower side of the sponge (15).

6. A fuel container according to any one of the preceding claims, characterised in that The sponge (15) is located in the groove-shaped receiving portion (16).

7. Fuel container according to the preceding claim, characterized in that A planar liquid-permeable component (17) is provided on the sponge (15).

8. Fuel container according to the preceding claim, characterized in that The planar liquid-permeable component (17) is fixed via snap connections (18, 19).

9. Fuel container according to any one of the two preceding claims, characterized in that The planar liquid-permeable component is a screen (17).

10. A fuel container according to any one of the three preceding claims, characterised in that The flat liquid-permeable component (17) has one or more protrusions (34), and the wick (10a) or the sponge (15) extends into one or more of the protrusions.

11. A fuel container according to any one of the five preceding claims, characterized in that The groove-shaped receiving portion (16) is provided with a refilling port (23) on its side wall and / or on its bottom wall for refilling the fuel container (1) with fuel.

12. Fuel container according to the preceding claim, characterized in that The refilling port (23) for refilling is provided on the side wall of the groove-shaped receiving portion (16) and is limited to the lower half of the side wall.

13. A fuel container according to any one of the preceding claims, characterised in that The sponge (15) is formed of fibers, and the fibers are formed of glass or metal.

14. A fuel container according to any one of the preceding claims, characterised in that The fuel container (7) is provided with a support (5) for the outer cover on the outside.

15. A fuel container according to any one of the preceding claims, characterised in that The fuel container (7) is provided with an airflow guide element (4) on the outside, and the airflow guide element (4) is spiral-shaped.

16. A fuel container according to any one of the preceding claims, characterised in that Alcohol is contained in the fuel container as liquid fuel.

17. A fuel container according to any one of the preceding claims, characterised in that The fuel container contains bioethanol, ethylene glycol, or propylene glycol.

18. A fuel container according to any one of the preceding claims, characterised in that A circumferential groove (35) is provided for inserting the outer cover (2).

19. A fuel container according to any one of the preceding claims, characterised in that Includes an inner container (36).

20. A fuel container according to any one of the preceding claims, characterised in that The fuel container (7) comprises an annular disk (40) which is arranged on the upper side of the fuel container (7).

21. A tabletop flame device (1) comprising a fuel container according to any one of the preceding claims and a housing (2).

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