Valve for a gas cartridge, gas cartridge for a water carbonator, and method for filling such a gas cartridge

Description

State of the art

[0001] The present invention relates to a valve for selectively closing and selectively opening a gas cartridge for a water dispenser, wherein the valve is configured to retain gas in the gas cartridge when it is closed and to provide a fluid connection to the gas cartridge when it is open, wherein the valve comprises a valve housing having a cartridge connection opening that is aligned along a longitudinal axis of the valve so that gas can flow into and out of the cartridge in the direction of the longitudinal axis.

[0002] Such valves are described, for example, in WO 01 / 94816 A1, DE 10 2019 217896 A1 and DE 200 13 847 U1.

[0003] These types of valves are used with gas cartridges, especially CO₂ cartridges, for sparkling water makers. Such makers are also called carbonators and typically have a gas cartridge connection through which the gas cartridge, or rather its valve, can be connected to the maker. An actuator on the maker allows the valve to be opened to release gas, especially CO₂, into a container with the liquid to be carbonated, such as drinking water.

[0004] A valve for gas cartridges for a water dispenser is known from WO01 / 94816A1.

[0005] Such a valve for a gas cartridge is known from DE 20 2020 005 533 U1. The known valve comprises a cartridge connection opening through which gas can be filled into and withdrawn from a receiving chamber of the gas cartridge. This cartridge connection opening is arranged along a direction parallel to the longitudinal axis, so that gas can flow into and out of the receiving chamber of the gas cartridge in the direction of the longitudinal axis. Furthermore, this valve has at least one external connection opening that opens laterally to the longitudinal axis, so that when gas is withdrawn from the water dispenser, it can flow out of the valve in a direction perpendicular to the longitudinal axis. It has been found to be a disadvantage that the lateral release of gas from the valve or the gas cartridge causes recoil forces that act perpendicular to the longitudinal axis of the valve or the gas cartridge.Since gas cartridges in such water dispensers are typically arranged in an upright, i.e., vertical, position, forces can arise in a horizontal direction when gas is drawn from the cartridge. These forces can cause the cartridge to tilt relative to a sealing contour of the water dispenser. This can lead to leaks between the gas cartridge and the water dispenser. Disclosure of the invention

[0006] The object of the present invention is to provide a valve or a gas cartridge in which lateral recoil forces are reduced.

[0007] To solve the problem, a valve for selectively closing and selectively opening a gas cartridge for a water dispenser is proposed. wherein the valve is configured to retain gas in the gas cartridge when it is closed and to provide a fluid connection to the gas cartridge when it is open, wherein the valve comprises a valve body having a cartridge connection opening oriented along a longitudinal axis of the valve so that gas can flow into and out of the gas cartridge in the direction of the longitudinal axis, and wherein the valve body comprises at least one outlet opening which is externally located and arranged along a direction parallel to the longitudinal axis such that gas can flow out of the valve in the direction parallel to the longitudinal axis, wherein the at least one outlet opening is spaced apart from the longitudinal axis.

[0008] The valve according to the invention is designed to be selectively closed and selectively opened, so that gas can be withdrawn from the gas cartridge as well as the gas cartridge can be selectively filled with gas. When the valve is closed, the gas can be retained in the gas cartridge. When the valve is open, a fluid connection to the gas cartridge, in particular to a receiving chamber of the gas cartridge, is established, so that withdrawal or filling can take place. The gas can be withdrawn from the gas cartridge via the outlet opening, which is arranged externally and oriented such that gas flows out of the valve in a direction parallel to the longitudinal axis of the valve housing, so that any recoil forces caused by the outflow act parallel to the longitudinal direction. In this way, recoil forces perpendicular to the longitudinal direction can be reduced or avoided.Therefore, when the gas cartridge with the valve is positioned upright in a water dispenser, lateral forces are reduced when gas is extracted.

[0009] Preferably, the outlet opening is arranged such that the gas can escape in a direction away from the cartridge connection opening.

[0010] Preferably, the valve housing has exactly one outlet opening, which is located externally and arranged along a direction parallel to the longitudinal axis such that gas can flow out of the valve in a direction parallel to the longitudinal axis. Alternatively, several outlet openings can be provided, for example two, three, four, five or six.

[0011] Even though the advantageous embodiments described below refer to at least one outlet opening, these embodiments include both the alternative of having exactly one outlet opening and alternatives with multiple outlet openings.

[0012] According to the invention, the at least one outlet opening is arranged at a distance from the longitudinal axis. Such an arrangement of the outlet opening allows the gas to be released from the gas cartridge both in a direction parallel to the longitudinal axis and in a region of the valve spaced away from the longitudinal axis, for example, in a lateral edge region of the valve. For example, the valve can have a cylindrical shape, and the at least one outlet opening can be located radially away from the cylinder axis.

[0013] According to an advantageous embodiment of the invention, the ratio of the distance of the outlet opening from the longitudinal axis to the distance of the outlet opening from an outer contour of the valve housing arranged parallel to the longitudinal axis is in the range of 10 to 1000, preferably in the range of 10 to 150, and particularly preferably in the range of 25 to 100. These distances are preferably defined from the center point of the outlet opening. The outer contour of the valve housing is preferably the outer contour of the valve housing in the region of the outlet opening, such that the distance of the outlet opening from an outer contour of the valve housing arranged parallel to the longitudinal axis is defined by a line segment perpendicular to the longitudinal axis in a cross-sectional plane intersecting the outlet opening. This ratio is particularly preferably in the range of 40 to 50, for example, 45.Choosing such a ratio can help ensure that the gas flows out of the valve in an area laterally distant from the longitudinal axis, while still flowing out of the valve parallel to the longitudinal axis.

[0014] According to an advantageous embodiment of the invention, the at least one outlet opening is designed in an annular segment shape, particularly an annular segment shape, or in a ring shape, particularly an annular shape. The annular segment or ring shape allows the gas to flow out of the valve concentrically with respect to the longitudinal axis. Furthermore, the annular segment or ring shape is less susceptible to clogging by impurities and / or being closed by valve deformation. If the valve housing comprises exactly one outlet opening, this opening is preferably annular in shape, so that the gas can flow out over the entire annular area. Such a single, annular outlet opening reduces or eliminates asymmetrical gas flow and the resulting recoil forces.

[0015] According to an advantageous embodiment of the invention, the valve housing comprises a housing core and a housing sleeve, wherein the at least one outlet opening is arranged between an inner contour of the housing sleeve and an outer contour of the housing core. Such an embodiment with a housing core and a housing sleeve enables cost-effective manufacturing of the valve housing, wherein the housing sleeve is joined to the housing core. It is therefore not necessary to use subtractive manufacturing processes, in particular machining processes, to provide the outlet opening in the valve housing.

[0016] In this context, it is advantageous if the outer contour of the housing core has a first diameter and the outer contour of the housing sleeve has a second diameter, wherein the ratio of the first diameter to the second diameter is in the range of 0.9 to 1, preferably in the range of 0.95 to 1 or in the range of 0.96 to 0.99, and particularly preferably in the range of 0.97 to 0.99. For example, the ratio of the first diameter to the second diameter can be 0.985, 0.980, or 0.990.

[0017] According to an advantageous embodiment of the invention, the housing sleeve is permanently attached to the housing core, i.e., not detachable without damage. Preferably, the housing sleeve is attached to the housing core via a material-bonded connection, for example, a welded joint and / or a soldered joint and / or an adhesive bond. Alternatively, the housing sleeve can be attached to the housing core via a force-fit connection, for example, a press fit and / or a shrink fit. For example, a press fit or interference fit can be formed with the housing core at one end of the housing sleeve opposite the outlet opening, particularly by the fact that the inner contour of the housing sleeve has a predetermined undersize relative to the outer contour of the housing core.

[0018] According to an advantageous embodiment of the invention, the housing sleeve is attached to the housing core in a manner that is not manually detachable, not detachable with a standard tool, or detachable only with a special tool. In this context, a standard tool is understood to be, for example, a wrench. A special tool in this context is not a standard tool, and in particular not a wrench. Preferably, the housing sleeve is attached to the housing core via a friction-fit connection, for example, a screw connection. The screw connection preferably exhibits a high degree of static friction between its contact surfaces, such that the screw connection cannot be loosened manually, i.e., by hand.

[0019] According to an advantageous embodiment of the invention, the housing sleeve is arranged at least partially in a fastening groove formed in the housing core, in particular annular in shape. For example, a connection area of ​​the housing sleeve can be arranged within the fastening groove, and an area of ​​the housing sleeve facing away from the connection area can protrude from the fastening groove. The connection area is preferably annular in shape, for example as an annular protrusion on an inner contour of the housing sleeve or as an annular, end-face end region.

[0020] According to an advantageous embodiment of the invention, the housing core comprises a first housing core part and a second housing core part, with the fastening groove being located in a region between the first and second housing core parts. Such a housing core configuration is particularly advantageous when the housing sleeve has a connection area that is designed as an annular protrusion on the inner contour of the housing sleeve. The two-part design of the housing core facilitates the assembly of the housing sleeve in the fastening groove.

[0021] In this context, a particularly advantageous design has proven to be one in which the housing sleeve has a connection area formed as an annular protrusion on an inner contour of the housing sleeve, and this connection area engages behind the first and / or second housing core part. In this respect, the connection area can have an undercut located radially inside the first and / or second housing core part. This undercut can, for example, be annular or segmental. This enables a positive-locking connection between the housing sleeve and the housing core, making it difficult or impossible to detach the housing sleeve in the radial direction.

[0022] According to an advantageous embodiment of the invention, the valve housing comprises a fastening element by which the housing sleeve is permanently, i.e., non-destructively, attached to the housing core. The fastening element can at least partially enclose the housing sleeve and the housing core. For example, the fastening element can have a receiving opening in which the housing core and housing sleeve are received, the receiving opening having a predetermined undersize with respect to the common material thickness of the housing core and housing sleeve. For connection, the housing sleeve can be arranged around the housing core, and the fastening element can be pressed onto the housing sleeve, thereby pressing the housing sleeve to the housing core.

[0023] According to an advantageous embodiment of the invention, the valve housing comprises a fastening element by which the housing sleeve is permanently attached to the housing core, the fastening element being arranged in the fastening groove. The fastening element is preferably arranged in the fastening groove, in particular pressed in, such that it secures the housing sleeve in the fastening groove.

[0024] According to an advantageous embodiment of the invention, the valve housing has a sealing element, in particular a sealing ring, for sealing the housing sleeve against the housing core, which is arranged on a side of the housing sleeve opposite the outlet opening. The sealing element seals the gap between the housing core and the housing sleeve on the side opposite the outlet opening, thus preventing unwanted gas escape by any means other than through the outlet opening.

[0025] According to an advantageous embodiment of the invention, the housing core has a feed channel that extends transversely, and in particular perpendicularly, to the longitudinal direction and opens into a nozzle in a space between the housing sleeve and the housing core. A fluid connection between an interior space of the valve housing and the outlet opening, or between the cartridge connection opening and the outlet opening, can be provided via the feed channel. The space between the housing sleeve and the housing core preferably extends parallel to the longitudinal direction and has at least one outlet opening.

[0026] According to an advantageous embodiment of the invention, the housing core has a larger cross-sectional width, in particular a larger diameter, on the side of the opening facing the cartridge connection than on the side of the opening opposite the cartridge connection. Due to the different cross-sectional widths on the sides of the opening, the outgoing gas flowing through the feed channel can be redirected in a direction parallel to the longitudinal axis and flow out of the outlet opening in this direction. For this purpose, a step can be provided on the outer contour of the housing core, which is arranged at the level of the feed channel opening. If the housing core is cylindrical in the region of the opening, it has a larger diameter on the side of the opening facing the cartridge connection than on the side of the opening opposite the cartridge connection.

[0027] According to an advantageous embodiment of the invention, a groove is arranged in the outer contour of the housing core, running parallel to the longitudinal direction, in particular exactly one groove. The groove can further improve the guidance of the outgoing gas in the direction parallel to the longitudinal direction. Optionally, several grooves can be arranged in the outer contour of the housing core, each running parallel to the longitudinal direction, in particular exactly two grooves.

[0028] In this context, it is advantageous if the groove is arranged such that it intersects the opening of the feed channel or terminates at the opening, allowing the gas flowing through the feed channel to be introduced into the groove. If two feed channels are provided, it is preferred that the groove be arranged such that it intersects the opening of both feed channels. If two feed channels are provided on opposite sides, it is preferred that two grooves be provided, each arranged such that it intersects the opening of one feed channel.

[0029] According to an advantageous embodiment of the invention, a retaining element, in particular annular, is arranged on the valve housing, by means of which the valve can be secured in a gas cartridge connection of a water dispenser. The retaining element preferably projects obliquely, in particular perpendicularly, from the longitudinal axis of the valve housing. When the valve is inserted into the gas cartridge connection of the water dispenser, for example by movement in the direction of the longitudinal axis, the retaining element can be engaged by a retaining element of the water dispenser, thereby securing the valve or the gas cartridge to the water dispenser.

[0030] According to an advantageous embodiment of the invention, a pressure relief valve, in particular comprising a rupture disc, is arranged on the valve housing and is configured to release any overpressure present in the area of ​​the cartridge connection opening. Preferably, the rupture disc is configured to rupture at a predetermined overpressure in this area. The rupture of the rupture disc allows a connection between the cartridge connection opening and the environment to be established. Preferably, the pressure relief valve includes an external overpressure outlet opening that opens laterally to the longitudinal axis.

[0031] According to an advantageous embodiment of the invention, the valve has a cartridge closure element that is biased into a closed position, in which the cartridge closure element closes a passage between the outlet opening and the cartridge connection opening. The cartridge closure element can be moved by an actuating element of the valve towards an open position, in which the passage between the outlet opening and the cartridge connection opening is open for gas release. Preferably, the actuating element of the valve is movable along its longitudinal axis. The actuating element can be actuated by an activation element of a water dispenser, for example, by an activation pin, when the valve or the gas cartridge is connected to a gas cartridge connection of the water dispenser.Preferably, the cartridge closure element is pre-tensioned towards the closed position by means of a first spring element. The first spring element can be designed as a helical spring, preferably as a compression spring. The aforementioned open position of the cartridge closure element can additionally be used to open a passage between the cartridge connection opening and any filling opening of the valve housing for introducing gas into the gas cartridge.

[0032] According to an advantageous embodiment of the invention, the valve housing has a filling opening on one side opposite the cartridge connection opening, through which gas can flow into the valve in the direction of its longitudinal axis. The filling opening is thus aligned along a longitudinal axis of the valve. The filling opening offers the advantage that it is not necessary to fill the gas cartridge via the outlet opening.

[0033] According to an advantageous embodiment of the invention, the valve housing has a filling opening on one side opposite the cartridge connection opening, through which gas can flow into the valve in the direction of the longitudinal axis, with the actuating element comprising the filling opening. In such an embodiment, the actuating element has a dual function: On the one hand, it can be used to actuate the gas withdrawal, in particular by being pressed in, and on the other hand, it provides a filling opening for filling the gas cartridge. It is therefore possible both to apply a pressure force in the direction of the longitudinal axis to activate the withdrawal of gas – in particular by means of an actuating element of a water dispenser – and to introduce gas into the valve in the direction of the longitudinal axis during filling.

[0034] According to an advantageous embodiment of the invention, the valve housing has a filling opening on one side opposite the cartridge connection opening, through which gas can flow into the valve in the direction of the longitudinal axis. The filling opening is arranged between an outer contour of the actuating element and an inner contour of the valve housing, and is particularly annular in shape. This embodiment allows the actuating element to be used, in particular pressed, to actuate the gas withdrawal. The actuating element can have one or more internal, in particular lateral, openings that open into a space between the outer contour of the actuating element and the inner contour of the valve housing. Gas flows through this internal opening.Through openings, gas flowing into the valve in the direction of the longitudinal axis can be directed into the actuating element, in particular along a direction transverse, preferably perpendicular, to the longitudinal direction.

[0035] According to a structurally advantageous embodiment of the invention, the outlet opening is located closer to the cartridge connection opening than the filling opening. Alternatively or additionally, it is structurally advantageous if the filling opening is offset relative to the outlet opening with respect to the longitudinal axis. For example, the filling opening can be aligned along the longitudinal axis of the valve so that gas can flow into the valve in the direction of the longitudinal axis, while the outlet opening is spaced apart from the longitudinal axis and arranged in such a way that gas can flow out of the valve in the direction parallel to the longitudinal axis.

[0036] According to an advantageous embodiment of the invention, the valve has an inlet closure element which is biased into a closed position by a second spring element. In this position, the inlet closure element closes a passage between the filling port and the cartridge connection port, or the filling port itself. The second spring element is designed such that the inlet closure element can be moved into an open position by applying a predetermined gas pressure to the filling port. In this open position, the passage between the filling port and the cartridge connection port, or the filling port itself, is open for gas introduction. The biased inlet closure element thus provides a partial filling valve, similar to a check valve, which retains gas within the valve and admits gas when a gas pressure exceeding the predetermined pressure is present at the filling port.The second spring element can be designed as a coil spring, preferably as a compression spring.

[0037] In this context, it is advantageous if the valve additionally has a cartridge closure element that is pre-tensioned to a closed position, in which the cartridge closure element seals the passage between the filling port and the cartridge connection port. The cartridge closure element can be moved by the valve's inlet closure element towards an open position, in which the passage between the filling port and the cartridge connection port is open for gas introduction. Thus, by moving the inlet closure element to its open position, the cartridge closure element can also be moved to its open position. This allows a fluid connection to be established between the inlet port and the cartridge connection port, through which the gas cartridge can be filled.The cartridge closure element is preferably the same cartridge closure element which, in the closed position, closes a passage between the outlet opening and the cartridge connection opening.

[0038] Preferably, the valve, particularly in the area of ​​the cartridge connection opening, includes a thread for connecting the valve to an opening of a gas cartridge. The thread is preferably designed as an external thread so that it can be screwed onto a corresponding internal thread of the gas cartridge.

[0039] To solve the aforementioned problem, a gas cartridge for connection to a gas cartridge connection of a water dispenser with a valve described above is also proposed.

[0040] The gas cartridge allows the same advantages and effects to be achieved as have already been explained in connection with the valve according to the invention.

[0041] Preferably, the gas cartridge has a thread, particularly preferably an internal thread, especially in the area of ​​an opening, to which the valve is connected. The gas cartridge can, for example, be designed according to the standard DIN EN ISO 7866:2021-05.

[0042] The advantageous designs and features described in connection with the valve can be used alone or in combination in the gas cartridge.

[0043] The invention further relates to a method for filling a gas cartridge described above, wherein the valve housing has a filling opening on one side opposite the cartridge connection opening, through which gas is introduced into the valve in the direction of the longitudinal axis.

[0044] This method allows a gas cartridge to be filled by supplying gas along the longitudinal axis of the valve. A gas-filled cartridge is provided, from which gas can be drawn through at least one outlet opening in a direction parallel to the longitudinal axis of the valve. In this way, recoil forces perpendicular to the longitudinal direction can be reduced or eliminated when gas is drawn.

[0045] According to an advantageous embodiment of the method according to the invention, the valve has an inlet closure element which is biased into a closed position by a spring element. In this closed position, the inlet closure element closes the filling port. A predetermined gas pressure is applied to the filling port to move the inlet closure element into an open position. The biased inlet closure element thus forms a type of check valve, which is opened when the predetermined gas pressure at the inlet port is exceeded. In the open position of the inlet closure element, gas can then be introduced into the valve through the inlet port.

[0046] According to an advantageous embodiment of the invention, a fluid connection between the outlet opening and the environment is sealed. For example, it is possible that one or more sealing elements bear against an outer contour of the valve housing, which seal the outlet opening.

[0047] Alternatively or additionally, the advantageous designs and features described in connection with the valve can also be used alone or in combination in the process.

[0048] Further details, features, and advantages of the invention will become apparent from the drawings and from the following description of preferred embodiments with reference to the drawings. The drawings merely illustrate exemplary embodiments of the invention, which do not limit the inventive concept. Brief description of the characters

[0049] The Fig. 1Figure 1 shows a gas cartridge according to an embodiment of the invention in a side view. Fig. 2 Figure 1 shows a valve according to an embodiment of the invention in a perspective view. Fig. 3 The valve indicates Fig. 2 in a top view. Fig. 4 shows a first embodiment of a valve according to the invention. Fig. 2 in a truncated perspective view. Fig. 5 shows a cutaway exploded view of the valve according to Fig. 4 . The Fig. 6 shows a cross-sectional view of part of the valve. Fig. 4 To explain how gas is drawn from the valve. Fig. 7 shows a cutaway detail view of the area of ​​the orifice of the valve's feed channel to Fig. 4 . The Fig. 8 shows a cutaway detail view of the gas outlet area of ​​the valve. Fig. 4 . The Fig. 9shows a cross-sectional view of part of the valve. Fig. 4 To explain how to fill the valve with gas according to a first method. Fig. 10 shows a cross-sectional view of part of the valve. Fig. 4 To explain how to fill the valve with gas according to a second method. Fig. 11 shows a second embodiment of a valve according to the invention. Fig. 2 in a truncated perspective view. Fig. 12 shows a cutaway exploded view of the valve according to Fig. 11 . The Fig. 13 shows a cross-sectional view of part of the valve. Fig. 11 To explain how gas is drawn from the valve. Fig. 14 shows a cutaway detail view of the area of ​​the orifice of the valve's feed channel to Fig. 11 . The Fig. 15 shows a perspective view of the valve core of the valve according to Fig. 11 . The Fig. 16shows a third embodiment of a valve according to the invention. Fig. 2 in a truncated perspective view. Fig. 17 shows a cross-sectional view of part of the valve. Fig. 16 To explain how gas is drawn from the valve. Fig. 18 shows a fourth embodiment of a valve according to the invention. Fig. 2 in a truncated perspective view. Fig. 19 shows a cross-sectional view of part of the valve. Fig. 18 To explain how gas is drawn from the valve. Fig. 20 shows a fifth embodiment of a valve according to the invention. Fig. 2 in a truncated perspective view. Fig. 21 shows a cross-sectional view of part of the valve. Fig. 20 To explain how gas is drawn from the valve. Fig. 22Figure 6 shows a sixth embodiment of a valve according to the invention in a sectional perspective view. Fig. 23 shows a cross-sectional view of part of the valve. Fig. 22 . The Fig. 24 Figure 7 shows a seventh embodiment of a valve according to the invention in a sectional perspective view. Fig. 25 shows a cross-sectional view of part of the valve. Fig. 24 . The Fig. 26 shows a perspective sectional view of the valve after Fig. 24 in the area of ​​its filling opening. Embodiments of the invention

[0050] In the various figures, identical parts are always marked with the same reference symbols and are therefore usually only named or mentioned once.

[0051] In the Fig. 1A gas cartridge 1 according to an embodiment of the invention is shown. The gas cartridge 1 is configured to be connected to a gas cartridge connection of a water dispenser. The gas cartridge 1 comprises a receiving chamber 2 with an opening on which a valve 10 according to the invention is arranged for selectively closing and selectively opening the gas cartridge 1. In the closed position of the valve 10, gas can be retained in the gas cartridge 1, and in the open position, a fluid connection can be provided to introduce gas into or extract gas from the gas cartridge 1. Fig. 1 Figure 1 shows the area of ​​the gas cartridge 1 that includes the valve 1. The gas cartridge 1 is shown in an upright position. In this upright position, the gas cartridge 1 can be connected to a water dispenser with the corresponding gas cartridge connection.

[0052] The representations in Figs. 2 and 3Figure 1 shows an embodiment of a valve 10 for selectively closing and selectively opening a gas cartridge 1 for a water dispenser, which is located on the gas cartridge 1 according to Fig. 1 The valve 10 is designed to retain gas in the gas cartridge 1 when closed and to provide a fluid connection to the gas cartridge 1 when open. The valve 10 comprises a valve body 11 having a cartridge connection opening 15 oriented along a longitudinal axis L of the valve 10, allowing gas to flow into and out of the gas cartridge 1 in the direction of the longitudinal axis L.

[0053] The valve housing 11 is connected to an annular retaining element 14, which secures the valve 10 in a gas cartridge connection of a water dispenser. For this purpose, the retaining element 14 can be engaged from behind by a suitable retaining element of the water dispenser. The retaining element 14 is attached to the outside of the valve housing 11. The retaining element 14 has a circular recess in which a part of the valve housing 11, in particular a part of a valve core 30 of the valve housing 11, is received. In this embodiment, the outer contour of the retaining element 14 is octagonal, but it can alternatively have a different shape, for example, circular, square, pentagonal, hexagonal, or heptagonal. A sealing element 20, here a sealing ring, is provided between the retaining element 14 and the valve housing 11.The retaining element 14 can be arranged between a projection of the valve housing 11 and a container housing of the gas cartridge 1. Alternatively, the retaining element 14 can be formed integrally with the valve housing 11.

[0054] Furthermore, a pressure relief valve 13, comprising a rupture disc 19, is arranged on the valve housing 11. The pressure relief valve 13 can release any overpressure existing in the area of ​​the cartridge connection opening by causing the rupture disc 19 to burst.

[0055] The valve housing 11 comprises an annular outlet opening 16, which is located externally and arranged along a direction parallel to the longitudinal axis L such that gas can flow out of the valve 10 in a direction parallel to the longitudinal axis L. The outlet opening 16 is spaced apart from the longitudinal axis L and allows the gas to flow out in a direction parallel to the outer wall of the valve housing 11. Therefore, the outlet opening 16 is located near the outer wall of the valve housing 11. The ratio of the distance of the outlet opening 16 from the longitudinal axis L to the distance of the outlet opening 16 from an outer contour of the housing sleeve 33 arranged parallel to the longitudinal axis L is in the range of 10 to 1000, preferably in the range of 10 to 150, particularly preferably in the range of 25 to 100, for example in the range of 40 to 50, and especially at 45.

[0056] Based on the illustrations in Figs. 4 to 10The construction of a first embodiment of a valve 10 is to be described according to Figs. 1 to 3 will be explained.

[0057] In the sectional view in Fig. 4 Valve 10 is shown in an operational state. Fig. 5 In contrast, an exploded view of the same valve 10 is shown. In the exploded view according to Fig. 5 Surfaces that have a thread are marked with the reference symbol G.

[0058] The valve housing 11 of the valve 10 comprises a housing core 30 and a housing sleeve 33, which is permanently attached to the housing core 30, i.e., it cannot be removed without damage. A fastening element 35 is provided as a further part of the valve housing 11 for securing the housing sleeve 33 to the housing core 30. The fastening element 35 is designed as a ring that is placed onto the assembly of the housing sleeve 33 and the housing core 30. An annular hole in the fastening element 35 has a predetermined undersize, so that an interference fit of the fastening element 35 is achieved on the assembly of the housing sleeve 33 and the housing core. In this respect, the housing sleeve 33 is positively and permanently connected to the housing core 30 by the fastening element 35.

[0059] An annular space is formed between the housing sleeve 33 and the housing core 30, opening into the outlet opening 16. The annular outlet opening 16 is thus located between an inner contour of the housing sleeve 33 and an outer contour of the housing core 30. The gas can flow out of the outlet opening from the space 36 in a direction parallel to the longitudinal axis L, cf. Figs. 6 and 7 . To seal the gap on the side of the housing sleeve 33 opposite the outlet opening 16, the valve housing 11 has a sealing element 34, in particular a sealing ring. The sealing element is arranged on one side of the housing sleeve 33 opposite the outlet opening 16. As shown in the illustrations in Figs. 6 and 7The sealing element 34, which can be removed, rests against both the housing sleeve 33 and a projection of the housing core 30 and is held in position by the fastening element 35, in particular by pressure.

[0060] The space 36 is fluidly connected to the interior of the valve 10 via a supply channel 31. The supply channel 31 is formed in the housing core 30 and runs transversely, in particular perpendicularly, to the longitudinal direction L. The opening of the supply channel 31 into the space 36 between the housing sleeve 33 and the housing core 30 is marked with reference numeral 32.

[0061] An insert 26 is arranged within the housing core 30. The insert 26 is held in the housing core 30 by a ring 27 in a force-fit manner. A cartridge closure element 28 is arranged in the interior of the housing core 30, which is inserted into a Fig. 4The closed position shown is pre-tensioned, in which the cartridge closure element 28 closes a passage between the outlet opening 16 and the cartridge connection opening 15, here a passage in the insert 26. The pre-tension is effected by a spring element 29. Against the pre-tension, the cartridge closure element 28 can be moved by an actuating element 21 of the valve 10 towards an open position, in which the passage between the outlet opening 16 and the cartridge connection opening 15 is open for gas release. The actuating element 21 is arranged externally on one side of the valve 10 opposite the cartridge connection opening 15 and can be moved in the direction of the longitudinal axis L to release gas from the valve 10. The actuating element 21 is coupled to the cartridge closure element 28 via an inlet closure element 24 in such a way that a pressure force can be transferred to the cartridge closure element 28.The actuating element 21 is mounted in a socket 22 so as to be movable along its longitudinal direction. The socket 22 is screwed to the housing core 30 on the side opposite the cartridge connection opening 15. A sealing element 23, in this case a sealing ring, is arranged between the actuating element 21 and the socket for sealing purposes.

[0062] The inlet closure element 24, in its closed position, closes a filling opening 17 located in the actuating element 21. The filling opening is configured to allow gas to flow into the valve 10 in the direction of the longitudinal axis L, provided the inlet closure element 24 releases it. The inlet closure element 24 is held in the position by a spring element 25. Fig. 4The closed position shown is pre-tensioned, in which the inlet closure element 24 closes the filling opening 17. The spring element 25 is configured such that the inlet closure element 24 can be moved into an open position by applying a predetermined gas pressure to the filling opening 17, in which the filling opening 17 is open for the introduction of gas. In the open position of the inlet closure element 24, gas can be introduced through the filling opening 17 into the interior of the valve housing 11 and then guided through the passage in the insert 26 towards the cartridge connection opening 15.

[0063] In the Fig. 6Figure 10 shows a detailed representation of a valve 10 connected to a gas cartridge connection of a water dispenser. The gas cartridge connection includes a sealing device 200, 200' which rests against an outer contour of the valve 10 and seals an area around the outlet opening 16. In this case, the sealing device has an upper sealing section 200 which seals above the outlet opening 16 and a lower sealing section 200' which seals below the outlet opening 16. A sealed space is thus created in the space between the two sealing sections 200, 200', into which the gas flowing out of the outlet opening 16 parallel to the longitudinal direction L is received. Fig. 6The sealing device 200, 200` shown further comprises a lateral opening 201 through which the gas flowing out of the valve 10, in particular the outlet opening 16, parallel to the longitudinal axis L, is diverted in a direction oblique to the longitudinal axis L, cf. arrow A in Fig. 8 . The gas can then be routed, for example via a pipe, to a carbonation unit of the water dispenser, through which the gas can be introduced into a container filled with water.

[0064] The detailed presentation in Fig. 7Figure 1 shows the area of ​​the valve housing 11 where the feed channel 31 opens into the space 36 between the housing core 30 and the housing sleeve 33. The fastening element 35, which connects the housing sleeve 33 to the housing core 30, is arranged laterally to the opening 32. For sealing, the sealing element 34 is also held by the fastening element 35 between a projection of the housing core 30 and the housing sleeve. Furthermore, a step 38 is provided in the outer contour of the housing core 30 in the area of ​​the opening 32 (see Figure 3). Fig. 5 Stage 38 is characterized by the fact that the housing core 30 has a larger cross-sectional width B1, here a larger diameter, on one side of the opening 32 facing the cartridge connection opening 15 than the cross-sectional width B2, here the diameter, on the side of the opening 32 facing away from the cartridge connection opening 15, cf. Fig. 7In the present embodiment, this step 38 creates the space 36 between the housing sleeve 33 and the housing core 30 on the side of the opening 32 facing away from the cartridge connection opening 15. In contrast, on the side of the opening 32 facing the cartridge connection opening 15, the housing sleeve 33 rests directly against the housing core 30.

[0065] The representations in Figs. 9 and 10 show conditions that occur during filling in Fig. 1The gas cartridge 1 shown can be inserted via the filling opening 17 on the side of the valve 10 opposite the cartridge connection opening 15 in order to seal a fluid connection between the outlet opening 16 and the environment. This is necessary to prevent unwanted gas from escaping through the outlet opening 16 when gas is introduced via the filling opening 17. Instead, the gas introduced into the valve 10 via the filling opening 17 can then be directed into the receiving chamber of the gas cartridge 1 via the cartridge connection opening 15. The illustrations in Figs. 9 and 10 Each figure shows that a sealing element 301 is arranged on the outer contour of the valve housing 11, which seals the area around the outlet opening 16 against the environment.

[0066] A second embodiment of a valve 10 according to Figs. 1 to 3 is based on the representations in Figs. 11 to 15explained. This valve 10 comprises elements that act in concert with the elements of the in Figs. 4 to 10 The elements shown are valve 10. These elements are marked with identical reference symbols and will not be explained again. Instead, reference is made to the corresponding description for these elements. Figs. 4 to 10 referred to. In contrast to the valve 10 according to the first embodiment, in the valve 10 according to the second embodiment the feed channel 31 is arranged at a different location on the housing core 30. Compared to Fig. 4 Is the feed channel 31 in Fig. 11 It is positioned further away from the cartridge connection opening 15, and thus shifted upwards. Accordingly, step 38 is also located in a position further away from the cartridge connection opening 15, cf. Fig. 12 compared to Fig. 5 .

[0067] In the second embodiment, a groove 37 is additionally arranged in the outer contour of the housing core 30, running parallel to the longitudinal direction L. The groove 37 is arranged such that it intersects the opening 32 of the feed channel 31 or terminates in the opening 32.

[0068] According to a modification of the first embodiment ( Figs. 4 to 10 A groove 37, which runs parallel to the longitudinal direction L, can be provided on the outer contour of the housing core 30. The groove 37 is preferably arranged such that it intersects the opening 32 of the feed channel 31 or terminates in the opening 32.

[0069] The explanations regarding Figs. 9 and 10 The same applies with regard to filling to a gas cartridge 1 which includes a valve 10 according to the second embodiment.

[0070] A third embodiment of a valve 10 according to Figs. 1 to 3 is based on the representations in Figs. 16 and 17explained. This valve 10 comprises elements that act in concert with the elements of the in Figs. 4 to 10 The elements shown are valve 10. These elements are marked with identical reference symbols and will not be explained again. Instead, reference is made to the corresponding description for these elements. Figs. 4 to 10 In contrast to the valve 10 according to the first embodiment, the valve 10 according to the third embodiment has a groove 37, in particular exactly one groove 37, arranged in the outer contour of the housing core 30, which runs parallel to the longitudinal direction L. The groove 37 is arranged such that it intersects the opening 32 of the feed channel 31, in particular exactly one feed channel 31.

[0071] The explanations regarding Figs. 9 and 10 The same applies with regard to filling to a gas cartridge 1 which includes a valve 10 according to the third embodiment.

[0072] A fourth embodiment of a valve 10 according to Figs. 1 to 3 is based on the representations in Figs. 18 and 19 explained. This valve 10 comprises elements that act in concert with the elements of the in Figs. 4 to 10 The elements shown are valve 10. These elements are marked with identical reference symbols and will not be explained again. Instead, reference is made to the corresponding description for these elements. Figs. 4 to 10In contrast to the valve 10 according to the first embodiment, the valve 10 according to the fourth embodiment has two grooves 37 arranged in the outer contour of the housing core 30, which run parallel to the longitudinal direction L. Furthermore, the valve 10 according to the fourth embodiment comprises two feed channels 31, which are arranged on diametrically opposite sides of the housing core. Preferably, the valve 10 comprises exactly two feed channels 31. The grooves 37 are arranged such that they each intersect the opening 32 of one of the feed channels 31.

[0073] The explanations regarding Figs. 9 and 10 The same applies with regard to filling to a gas cartridge 1 which includes a valve 10 according to the fourth embodiment.

[0074] A fifth embodiment of a valve 10 according to Figs. 1 to 3 is based on the representations in Figs. 20 and 21explained. This valve 10 comprises elements that act in concert with the elements of the in Figs. 4 to 10 The elements shown are valve 10. These elements are marked with identical reference symbols and will not be explained again. Instead, reference is made to the corresponding description for these elements. Figs. 4 to 10 In contrast to the valve 10 according to the first embodiment, the valve 10 according to the fifth embodiment has a groove 37, in particular exactly one groove 37, arranged in the outer contour of the housing core 30, which runs parallel to the longitudinal direction L.

[0075] The groove 37 is arranged such that it intersects the opening 32 of a first feed channel 31 or terminates in the opening 32. Furthermore, according to the fifth embodiment, the valve 10 comprises an additional second feed channel 31, which opens into the same groove 37 as the other feed channel 31.

[0076] The explanations regarding Figs. 9 and 10The same applies with regard to filling to a gas cartridge 1 which includes a valve 10 according to the fifth embodiment.

[0077] The representations in Figs. 22 to 26 Figures six and seven show an embodiment of a valve 10 for selectively closing and selectively opening a gas cartridge 1 for a water dispenser, which is alternatively fitted to the gas cartridge 1 according to Fig. 1The valves 10 according to these embodiments are configured to retain gas in the gas cartridge 1 when closed and to provide a fluid connection to the gas cartridge 1 when open. Each valve 10 comprises a valve body 11 having a cartridge connection opening 15 oriented along a longitudinal axis L of the valve 10, allowing gas to flow into and out of the gas cartridge 1 in the direction of the longitudinal axis L. The design of the valves 10 according to the sixth and seventh embodiments is similar to that of the valves 10 according to the preceding embodiments; therefore, identical reference numerals denote elements with identical function, and reference is made to the explanations of the preceding embodiments in this regard.The descriptions of the preceding embodiments regarding filling also apply accordingly to a gas cartridge 1 which includes a valve 10 according to the sixth or seventh embodiment.

[0078] The in Figs. 22 and 23The illustrated valve 10 has a valve body 11 with a housing core 30, which includes a mounting groove 39. The mounting groove 39 is annular and opens in the direction of the longitudinal axis L. An annular, end-face region of the housing sleeve 33 is arranged in the mounting groove 39. Furthermore, a fastening element 35 is located within the mounting groove 39. The fastening element 35 is annular and pressed into the mounting groove 39, so that the fastening element 35 secures the housing sleeve 33 in the mounting groove 39. A sealing element 34, for example a sealing ring, is also provided between the fastening element 35 and the housing sleeve 33, arranged within the groove.

[0079] Between the housing sleeve 33 and the housing core 30, an annular outlet opening 16 is formed, which is located externally and is arranged along a direction parallel to the longitudinal axis L in such a way that gas can flow out of the valve 10 in the direction parallel to the longitudinal axis L.

[0080] The in Figs. 24, 25 and 26The illustrated valve 10 has a valve body 11 with a housing core 30, which is designed in multiple parts. According to the exemplary embodiment, the housing core 30 comprises a first housing core part 30.1 and a second housing part 30.2. The housing core parts 30.1 and 30.2 are connected to each other, for example, by a screw connection. This screw connection is preferably non-releasable, i.e., not releasable without damage, or not releasable manually, or not releasable with a standard tool, or releasable only with a special tool. The first housing core part 30.1 and the second housing core part 30.2 are designed such that an annular fastening groove 39 is formed in a region between the first housing core part 30.1 and the second housing core part 30.2. An annular protrusion of the housing sleeve 33 is arranged and fixed in this fastening groove 39.

[0081] A space with an annular outlet opening 16 is formed between the housing sleeve 33 and the housing core 30. This outlet opening is located externally and is arranged along a direction parallel to the longitudinal axis L such that gas can flow out of the valve 10 in a direction parallel to the longitudinal axis L. The space between the housing sleeve 33 and the housing core 30 is fluidly connected to the interior of the valve 10 via a supply channel 31. The supply channel 31 is formed between the first housing core part 30.1 and the second housing core part 30.2 and extends transversely, in particular perpendicularly, to the longitudinal direction L. In this embodiment, the supply channel 31 bends radially inward, first parallel to the longitudinal direction L, and then again in a direction transversely, in particular perpendicularly, to the longitudinal direction L. The supply channel 31 opens radially inward into the interior of the valve 10.

[0082] Inside the housing core 30, a cartridge locking element 28 is arranged, which is inserted into a Fig. 24The closed position shown is pre-tensioned, in which the cartridge closure element 28 closes a passage between the outlet opening 16 and the cartridge connection opening 15, here a passage in the second housing core part 30.2. The pre-tension is effected by a spring element 29. Against the pre-tension, the cartridge closure element 28 can be moved by an actuating element 21 of the valve 10 towards an open position, in which the passage between the outlet opening 16 and the cartridge connection opening 15 is open for gas release. The actuating element 21 is arranged externally on one side of the valve 10 opposite the cartridge connection opening 15 and can be moved in the direction of the longitudinal axis L to release gas from the valve 10.The actuating element 21 is coupled to the cartridge closure element 28 via an inlet closure element 24 such that a pressure force can be transmitted to the cartridge closure element 28. The actuating element 21 is mounted in the first housing core part 30.1 so as to be movable along its longitudinal direction. A sealing element 23, in this case a sealing ring, is arranged between the actuating element 21 and the first housing core part 30.1 for sealing purposes.

[0083] As shown in Fig. 26The valve housing 11 has a filling opening 17 on one side opposite the cartridge connection opening 15, through which gas can flow into the valve 10 in the direction of the longitudinal axis L. The filling opening 17 is arranged between an outer contour of the actuating element 21 and an inner contour of the valve housing 11. This filling opening 17 is annular in shape. The actuating element 21 comprises several internal, in particular lateral, openings 40 that open into a space between the outer contour of the actuating element 21 and the inner contour of the valve housing 11. Through these internal openings 40, gas flowing into the valve in the direction of the longitudinal axis L can be guided into the actuating element 21, in particular along a direction transverse, preferably perpendicular, to the longitudinal direction.The incoming gas can, at sufficient gas pressure, move the inlet closure element 24 into its open position, in which the passage between the filling port 17 and the cartridge connection port 15 is open. In the open position of the inlet closure element 24, gas can be introduced through the filling port 17 into the interior of the valve housing 11 and then guided through the passage in the second housing core part 30.2 towards the cartridge connection port 15.

[0084] One of the embodiments with internal, lateral openings 40 of the actuating element 21 is also found in the one in Figs. 22 and 23 shown sixth embodiment of a valve 10 according to the invention.

[0085] According to a modification of the in Figs. 24 to 26In the illustrated embodiment, the housing sleeve 33 is formed integrally with the element designed as the second housing core part 30.2. In this modification, the valve housing 11 is essentially formed by the housing sleeve 33, 30.2, and the housing core 30.1. The outlet opening 16 is provided between an inner contour of the housing sleeve 33 and the outer contour of the housing core 30.1. This modification offers the advantage that the joining of the housing sleeve 33, 30.2, and the housing core 30.1 can be simplified. In the modification of the one shown in Fig. 24 In the illustrated embodiment, the joining of housing sleeve 33, 30.2 and housing core 30.1 can be effected via a screw connection that is non-removable, i.e., not removable without destruction, or not removable manually, or not removable with a standard tool, or removable only with a special tool.

[0086] According to an alternative modification of the in Figs. 14 to 26In the illustrated embodiment, the housing sleeve 33 comprises a connection area on its inner contour which engages behind the first housing core part 30.1 and / or the second housing core part 30.2. In this way, a positive-locking connection of the sleeve element with the housing core is enabled, which makes it difficult or impossible to loosen the housing sleeve 33 in the radial direction. Reference symbol list

[0087] 1 Gas cartridge 2 Storage chamber 10 Valve 11 Valve housing 13 Pressure relief valve 14 Retaining element 15 Cartridge connection opening 16 Outlet opening 17 Filling opening 18 Pressure relief valve opening 19 Burst disc 20 Sealing element 21 Actuating element 22 Socket 23 Sealing element 24 Inlet closure element 25 Spring element 26 Insert 26' Stop surface 27 Ring 28 Cartridge closure element 29 Spring element 30 Housing core 30.1 Housing core part 30.2 Housing core part 31 Feed channel 31' Feed channel 32 Mouth 33 Housing sleeve 34 Sealing element 35 Fastening element 36 Space 37 Groove 38 Step 39 Fastening groove 40 Opening 200, 200' Sealing device 201 Opening Flow direction B1 Cross-sectional width B2 Cross-sectional width G Thread L Longitudinal axis

Claims

1. Valve (10) for selectively closing and selectively opening a gas cartridge (1) for a soda machine, wherein the valve (10) is configured to hold a gas in the gas cartridge (1) when closed and to provide a fluid connection to the gas cartridge (1) when open, wherein the valve (10) comprises a valve housing (11) having a cartridge-connection opening (15), said cartridge-connection opening being oriented along a longitudinal axis (L) of the valve (10), so that gas is able to flow into the gas cartridge (1), and out of the gas cartridge (L), in the direction of the longitudinal axis (L), wherein the valve housing (11) comprises at least one outlet opening (16) which is arranged externally and arranged along a direction parallel to the longitudinal axis (L) in such a way that gas is able to flow from the valve (10) in the direction parallel to the longitudinal axis (L), characterized in that the at least one outlet opening (16) is arranged spaced apart from the longitudinal axis (L).

2. Valve (10) according to Claim 1, characterized in that a ratio of the distance of the outlet opening (16) from the longitudinal axis (L) to a distance of the outlet opening (16) from an outer contour, arranged parallel to the longitudinal axis (L), of the valve housing (11) lies in the range from 10 to 1000, preferably in the range 10 to 150, particularly preferably in the range 40 to 50.

3. Valve (10) according to either of the preceding claims, characterized in that the at least one outlet opening (16) is of ring-segment-shaped, in particular circular-ring-segment-shaped, form or of ring-shaped, in particular circular-ring-shaped, form.

4. Valve (10) according to one of the preceding claims, characterized in that the valve housing (11) comprises a housing core (30) and a housing sleeve (33), wherein the at least one outlet opening (16) is arranged between an inner contour of the housing sleeve (33) and an outer contour of the housing core (30) .

5. Valve (10) according to Claim 4, characterized in that the housing sleeve (33) is arranged at least partially in an, in particular ring-shaped, fastening groove (39) which is formed in the housing core (30), in particular wherein the housing core (30) comprises a first housing-core part (30.1) and a second housing-core part (30.2), wherein the fastening groove (39) is arranged in a region between the first housing-core part (31.1) and the second housing-core part (31.2), wherein the housing sleeve (33) has an attachment region, which is in the form of a ring-shaped protuberance on an inner contour of the housing sleeve (33), and the attachment region of the housing sleeve (33) engages behind the first housing-core part (30.1) and / or the second housing-core part (30.2).

6. Valve (10) according to either of Claims 4 and 5, characterized in that the housing core (30) has a supply channel (31) which is arranged so as to extend transversely, in particular perpendicularly, to the longitudinal direction (L) and which opens out at a mouth (32) into an intermediate space between the housing sleeve (33) and the housing core (30), in particular wherein the housing core (30) has on a side of the mouth (32) that is directed towards the cartridge-connection opening (15) a greater cross-sectional width (B1), in particular a greater diameter, than on a side of the mouth (32) that is directed away from the cartridge-connection opening (15).

7. Valve (10) according to one of the preceding claims, characterized in that, on the valve housing (11), there is arranged an, in particular ring-shaped, retaining element (14) via which the valve (10) is able to be fixed in a gas-cartridge connection of a soda machine.

8. Valve (10) according to one of the preceding claims, characterized in that, on the valve housing (11), there is arranged an overpressure valve (13), in particular comprising a rupture disc (19), which overpressure valve is configured to allow escape of an overpressure prevailing in the region of the cartridge-connection opening (15).

9. Valve (10) according to one of the preceding claims, characterized by a cartridge closure element (28) which is preloaded into a closed position, in which closed position the cartridge closure element (28) closes off a passage between the outlet opening (16) and the cartridge-connection opening (15), wherein the cartridge closure element (28) is able to be moved by an actuation element (21) of the valve (10) in the direction of an open position, in which open position the passage between the outlet opening (16) and the cartridge-connection opening (15) is open for discharge of gas.

10. Valve (10) according to one of the preceding claims, characterized in that, on a side situated opposite the cartridge-connection opening (15), the valve housing (11) has a filling opening (17) via which gas can flow into the valve in the direction of the longitudinal axis (L), in particular wherein the filling opening (17) is arranged between an outer contour of the actuation element (21) and an inner contour of the valve housing (11), wherein the filling opening (17) is of in particular ring-shaped form.

11. Valve (10) according to Claim 10, characterized by an inlet closure element (24) which is preloaded by a spring element (25) into a closed position, in which closed position the inlet closure element (24) closes off a passage between the filling opening (17) and the cartridge-connection opening (15) or the filling opening (17), wherein the spring element (25) is designed in such a way that, by application of a predefined gas pressure at the filling opening (17), the inlet closure element (24) is able to be brought into an open position, in which open position the passage between the filling opening (17) and the cartridge-connection opening (15) or the filling opening (17) is open for introduction of gas.

12. Gas cartridge (1) for connection to a gas-cartridge connection of a soda machine, having a valve (10) according to one of the preceding claims.

13. Method for filling a gas cartridge (1) according to Claim 12, wherein, on a side situated opposite the cartridge-connection opening (15), the valve housing (11) has a filling opening (17) via which gas is introduced into the valve (10) in the direction of the longitudinal axis (L).

14. Method according to Claim 13, characterized in that the valve (10) has an inlet closure element (24) which is preloaded by a spring element (25) into a closed position, in which closed position the inlet closure element (24) closes off the filling opening (17), wherein a predefined gas pressure is applied at the filling opening (17) in order to bring the inlet closure element (24) into an open position.

15. Method according to either of Claims 13 and 14, wherein a fluid connection between the outlet opening (16) and the surroundings is sealed off.