Pressure vessel

Abstract

The invention relates to a pressure vessel (1) comprising: - a vessel body (3), wherein an end region (2) is formed integrally with the vessel body (3) at an upper end, which has a vessel opening (O), and wherein the vessel body (3) has a vessel bottom (4) arranged at a lower end and formed integrally with the vessel body (3), - a valve (6) which is arranged in and / or on the end region (2). According to the invention, the pressure vessel (1) has a suction pipe (9) which is arranged in a vessel interior (8) and is rigidly and fluid-tightly connected to the valve (6), wherein a pipe interior of the suction pipe (9) is fluidically connected to a passage opening (DO) of the valve (6), and wherein the suction pipe (9) extends towards the vessel bottom (4) into a region of the vessel bottom (4) and has a pipe opening (10) in the region of the vessel bottom (4).

Description

[0001] The invention relates to a pressure vessel according to the features of the preamble of claim 1.

[0002] As described in EP 3 556 218 A2, a pressure vessel for holding physical propellants is known from the prior art. At least one flavored, edible physical propellant in the form of a fluid is arranged in the pressure vessel.

[0003] US Patent 2,412,434 A describes a pressure vessel with an outlet valve at its upper end and a downward-extending tube. At the lower end of the tube is an element shaped like an inverted bowl. The cross-sectional area of ​​the opening at the lower end of this element is therefore larger than the cross-sectional area of ​​the tube. This element serves to receive components that are poured into the inverted pressure vessel through its base.

[0004] A spray can is known from US patent 3,069,098 A. It has a closed container with a spray head at one end, which is equipped with a valve. Furthermore, it has a dip tube located inside the container and connected to the spray head to deliver a liquid filling from the container to the spray head.

[0005] German patent DE 19 54 416 A1 describes an aerosol can with a valve riser tube. The upper part of the riser tube has one or more additional openings.

[0006] From DE 19 73 996 U, a container is known which contains two immiscible liquid phases separated by gravity: an aqueous phase and an organic phase formed by a liquefied propellant gas in which an active ingredient is dissolved. The container has a distribution device formed by an atomizing shut-off valve connected to an extension tube that is immersed in the liquid and open at the end. The immersion tube has at least a series of fine openings extending over a length of the tube such that certain openings are located in the aqueous phase and the other openings in the organic phase.

[0007] US Patent 2,390,871 A describes a device for mixing and dispensing liquids of different densities. The device comprises a cylinder for dispensing a pressurized mixture of liquids that differ significantly in their volatility, at least one of which is normally in a gaseous state.The cylinder is provided at its upper end with a discharge valve body and a tube having a discharge branch connected to the valve body and extending downwards from it to a point in the immediate vicinity of the bottom of the cylinder, and a branch connected to the first-mentioned branch and extending upwards from it to a point above the liquid level of a normally full filling of liquids within the cylinder, the supply branch being provided with an inlet in its bottom arranged such that liquid is supplied substantially axially into the supply branch, and with an inlet of substantially the same size above the level, and the opposite branch of the tube being provided with a relatively large inlet also arranged above the level.

[0008] A device for dispensing a product is known from US Patent 2006 / 0006200 A1. The device comprises a container holding the product to be dispensed under pressure, a propellant in the form of a liquefied gas with a gaseous and a liquid phase, and at least one retaining element capable of enclosing the liquid phase of the propellant. The retaining element includes at least one section permeable to the gaseous phase of the propellant.A valve is connected to the container and comprises a body that includes a first passage which, when the device is in a first position, is able to cause the product contained in the container to enter the valve body when the valve is actuated, and a second passage which, when the device is in the first position, is able to cause the propellant contained in the container in gaseous form to enter the valve body when the valve is actuated.

[0009] The invention is based on the objective of providing a pressure vessel that is improved compared to the prior art.

[0010] The problem is solved according to the invention by a pressure vessel having the features of claim 1.

[0011] Advantageous embodiments of the invention are the subject of the dependent claims.

[0012] A pressure vessel comprises a vessel body. At one upper end of the vessel body, an end section is formed integrally with the vessel body. This end section, formed integrally with the vessel body, can also be referred to as an end piece. The end section has a vessel opening. Furthermore, the vessel body has a vessel bottom located at one lower end and formed integrally with the vessel body. The pressure vessel also has a valve, which is located in and / or on the end section. The valve is, for example, screwed into the end section. It is, for example, designed as a check valve.

[0013] The end section of the container opening is sealed by the valve in a media-tight manner. The valve, in particular, has a valve body with a through-hole in which a valve plunger is arranged. In a closed valve position, the plunger seals the through-hole in a media-tight manner, and in an open valve position, it releases the through-hole.

[0014] According to the invention, the pressure vessel has a suction pipe which is arranged inside the pressure vessel and is rigidly and fluid-tightly connected to the valve. An internal section of the suction pipe is fluidically connected to the valve's through-hole. The suction pipe extends towards the bottom of the vessel into a region of the vessel bottom and has a pipe opening in this region. The pipe opening is located, in particular, in a lower tenth of the vessel interior, specifically in a lower tenth of the vessel interior height.

[0015] The pressure vessel, particularly a pressurized gas vessel, enables a direct, media-tight connection to another port, such as an application port. For actuation within the application, the valve stem is moved into the open position by the application, for example, by means of an actuating unit. This allows the medium to flow from the vessel's interior through the passage opening, out of the pressure vessel, and into the application.

[0016] The pressure vessel is particularly advantageous for a medium intended for introduction into a beverage, comprising a propellant, in particular a propellant gas, and a flavoring. The propellant is in particular carbon dioxide (CO₂). The flavoring comprises in particular at least one essential oil as a carrier substance. The medium is thus a flavored propellant.

[0017] If the pressure vessel is filled with such a medium, it can be used in an application by means of which the medium, in particular the

[0018] Carbon dioxide and flavoring can be introduced into the beverage, for example, water. The device is therefore used to simultaneously carbonate and flavor a beverage, such as water, and is thus also called a water carbonator or beverage carbonator. The pressure vessel is also referred to as a gas cartridge.

[0019] To fill the pressure vessel with such a medium, it may be provided, for example, that the components of the medium, i.e., the propellant, in particular carbon dioxide, and the flavoring, are mixed before filling the pressure vessel and filled together, or that they come together only inside the pressure vessel. That is, it may also be provided that the pressure vessel is filled sequentially with these components of the medium, for example, first with the flavoring and then with the propellant, in particular carbon dioxide. The medium with which the pressure vessel is then filled, and which is then intended for introduction into a beverage, then contains the carbon dioxide and the flavoring.

[0020] A problem with using previously known pressure vessels that lack a suction tube is that, after filling, the propellant is in a gaseous state (or, for example, a transitional state between liquid and gas) in approximately the upper third of the vessel's interior, while it is in a supercritical liquid state in approximately the lower two-thirds. The flavoring is in a liquid state in the lower part of the vessel and is therefore mixed primarily with the liquid portion of the propellant. When the valve is opened, the propellant, already in a gaseous state, escapes from the upper part of the vessel, where it is not optimally mixed with the flavoring.

[0021] To achieve sufficient mixing of the propellant with the flavoring, the pressure vessel would have to be heated above room temperature so that the flavoring also evaporates and mixes with the propellant. However, this also increases the pressure inside the vessel, which is only permissible up to a maximum pressure. Furthermore, the gaseous propellant and the flavoring separate again over time. Therefore, for carbonation with an optimally mixed flavored propellant, the propellant would have to be reheated and mixed with the flavoring before each carbonation process. This is impractical. The consequence is inconsistent flavoring of beverages. Moreover, a relatively large quantity of flavoring is required to ensure sufficient flavoring.

[0022] These problems are solved by the invention. The taste of beverages flavored using the flavored propellant is significantly improved, and the need for expensive flavorings is considerably reduced.

[0023] In the solution according to the invention, it is not a problem that the aroma collects at the bottom of the pressure vessel after it has been filled with the propellant and the aroma, or that it only mixes with the liquid supercritical part of the propellant, because by means of the suction pipe, the pipe opening of which is located in the area of ​​the bottom of the vessel, either the aroma or the aroma and the liquid supercritical propellant are drawn in from this area of ​​the bottom of the vessel, are gaseous during their ascent in the suction pipe and are then discharged in the gaseous state through the valve from the interior of the vessel and introduced into the beverage.

[0024] The suction tube is specifically designed to draw in liquid propellant and flavoring, and in particular to mix the liquid propellant with the flavoring. As mentioned, this flavored propellant changes from a liquid to a gaseous state during its ascent to the valve and then exits through the open valve into the application, i.e., the beverage carbonator. This results in optimal carbonation and flavoring of the beverage, for example, water.

[0025] For this purpose, the suction pipe, as described, is firmly and tightly connected to the valve and designed such that the liquid, especially flavored, propellant drawn from the area of ​​the container bottom transitions into a gaseous state as it rises. To achieve this, the suction pipe is designed so that its opening is always located in the area of ​​the container bottom.

[0026] In further embodiments, described in more detail below, it can be provided that the suction pipe is designed in such a way that it draws in the propellant, which is in a gaseous state, from the upper area, in particular the upper third, of the interior of the container and, in particular by means of the Venturi effect, draws in the aroma via the pipe opening in the area of ​​the bottom of the container, thereby also achieving the optimal mixture of aroma and propellant and thus the optimally aromatized propellant.

[0027] In one possible embodiment, the pipe opening is formed at one end of the suction pipe, thus creating a pipe end opening. This is a particularly simple embodiment of the suction pipe to manufacture. If the pipe end is straight, i.e., if the cross-section of the opening is oriented perpendicular to the longitudinal axis of the suction pipe, the pipe end is positioned at a distance from the bottom of the container, but, as described, within the area of ​​the container bottom. This ensures that the pipe opening is not blocked by the container bottom.

[0028] In one possible embodiment, the pipe end is angled, meaning the cross-sectional area of ​​the pipe opening runs at an angle to the longitudinal axis of the suction pipe. This ensures that even if the suction pipe extends to the bottom of the container, the pipe opening, which is also located at the pipe end and thus forms the pipe end opening, is not blocked by the container bottom.

[0029] In one possible embodiment, the end section of the suction tube is funnel-shaped towards the tube end. The opening at the tube end, forming the tube end opening, therefore has a smaller cross-section than the other sections of the suction tube. This results in optimized intake of the aroma and / or the liquid propellant.

[0030] In one possible embodiment, the suction pipe is U-shaped, with the pipe end located in an upper region of the container interior. The pipe opening, which is located in the region of the container bottom, is therefore not formed at the pipe end; that is, this pipe opening is not identical to the pipe end opening, but rather is formed in the lower region of the U-shape, specifically at the lowest point of the U-shape. The pipe end naturally also has the pipe end opening at its end, in addition to the main pipe opening.When the valve is opened, the propellant, which is in a gaseous state, is drawn in from the upper area, particularly the upper third, of the container's interior via the pipe end opening. This, particularly due to the Venturi effect, draws in the aroma via the pipe opening near the bottom of the container, thus achieving the optimal mixture of aroma and propellant and, consequently, an optimally flavored propellant. For this purpose, the pipe end, and therefore the pipe end opening, is located in the upper third of the container's interior, specifically in the upper third of its height.

[0031] In one possible embodiment, at least one wall opening is formed in the upper section of the suction pipe, for example, in the form of a slot or a bore. For example, several such wall openings are provided. The pipe opening is specifically designed as a pipe end opening at the end of the suction pipe. When the valve is opened, the propellant, which is in a gaseous state, is drawn in from the upper section, particularly the upper third, of the container interior through the at least one wall opening or the multiple wall openings. The aroma is then drawn in through the pipe opening near the bottom of the container, particularly due to the Venturi effect, thus achieving the optimal mixture of aroma and propellant and, consequently, the optimally flavored propellant.For this purpose, at least one wall opening is arranged in an upper third of the container interior, particularly in an upper third of the height of the container interior.

[0032] The aforementioned pipe end, at which the pipe end opening is located, is always the free pipe end of the suction pipe spaced away from the valve.

[0033] In one possible embodiment of the pressure vessel, a mounting structure for the valve is formed on the inside of a wall surrounding the vessel opening of the end region. This structure has, in particular, an internal thread located on the inside of the wall. In another possible embodiment, the valve, i.e., specifically the valve body, has an external thread corresponding to the internal thread of the mounting structure. When screwed into the internal thread, particularly when fully screwed in (i.e., to a predetermined end position), the valve is located in the region of the vessel opening of the end region and projects from the vessel opening into the end region. It is, in particular, in a media-tight seal against the end region.

[0034] The container body has, in particular, a connection geometry arranged on the outside of a wall surrounding the container opening of the end area, for example an external thread, such as an ACME thread, or a snap-fit ​​arrangement or a quick-release fastener, wherein the wall with the connection geometry forms a connection which is designed to be or be coupled in a media-tight manner to a corresponding further connection, in particular a connection of the application.

[0035] In one possible embodiment, the pressure vessel features an overpressure relief device. For example, this overpressure relief device is located in the valve. Alternatively, this overpressure relief device is located, for example, in the vessel base, particularly in an overpressure vent formed in the vessel base. With a suitable design of the vessel base, such as a corresponding recess, this allows for an integrated arrangement of the overpressure relief device without it protruding beyond the outer edge of the pressure vessel. This increases protection against mechanical damage to the overpressure relief device. Furthermore, the required installation space for the pressure vessel can be reduced, and mounting the pressure vessel within the installation space is simplified.

[0036] The overpressure protection system includes, for example, a rupture disc. For instance, an overpressure channel is formed running through the valve stem, which is sealed media-tight by the rupture disc. The rupture disc is positioned at the end of the overpressure channel facing the interior of the container, for example, on the valve stem, and is held in place by the valve stem housing. Alternatively, the rupture disc is secured, for example, with a screw including a vent bolt, either in the valve or in the bottom of the container. This type of overpressure protection system, particularly using a rupture disc, is especially simple, cost-effective, and reliable. For example, the overpressure protection system is designed for a release pressure of 250 bar. However, any other release pressure value is also possible.

[0037] For example, the rupture disc is fluidically coupled to the interior of the pressure vessel, i.e., to the vessel interior. It is held, for instance, at its edge by the screw, within which a vent bolt is formed or arranged, or by the housing and the valve stem with its integrated overpressure channel. If the trigger pressure is exceeded, the rupture disc is mechanically destroyed, creating a fluidic connection between the vent bolt or the overpressure channel and the vessel interior, allowing the medium inside the vessel, such as gas, to escape.

[0038] Particularly when the overpressure relief device is located in the bottom of the container, the overpressure opening includes, for example, an internal thread corresponding to the external thread of the screw, into which the screw is screwed. This allows for a particularly simple and secure fastening of the overpressure relief device. The internal thread can be produced, for example, by machining. However, the internal thread can also be created during the forming of the container bottom using a forming process, such as roll forming. Alternatively, other methods for producing the internal thread are also possible.

[0039] In a process for manufacturing a previously described pressure vessel, the vessel body and the end section are produced together from a single blank using a roll forming process. The one-piece construction of the entire vessel body, including the base and end section, achieves exceptionally high pressure stability with minimal effort and material usage, as weak points such as welds are avoided. Furthermore, the valve mounting structure and, in particular, the connection geometry are produced in the end section by machining and / or forming, especially during the roll forming process, and / or by applying material and / or other suitable methods.The valve, with its attached suction pipe, is then attached to the end of the vessel opening, in particular by screwing it in. The pressure vessel can be manufactured particularly easily and with high quality using the roll forming process. The production of the mounting structure and the attachment of the valve are also particularly simple, reliable, and cost-effective. In one possible embodiment of the pressure vessel manufacturing process, the overpressure vent in the vessel base is created by machining and / or forming, particularly during the roll forming process, and / or by applying material and / or other suitable methods, and the overpressure relief device is then attached to the overpressure vent. The production of the overpressure vent and the attachment of the overpressure relief device are particularly simple, reliable, and cost-effective.

[0040] Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

[0041] It shows: Figure 1 schematically shows a longitudinal section of an embodiment of a pressure vessel, Figure 2 schematically shows a longitudinal section of an embodiment of a pressure vessel, Figure 3 schematically shows a longitudinal section of an embodiment of a pressure vessel, Figure 4 schematically shows a longitudinal section of an embodiment of a pressure vessel, and Figure 5 schematically shows a detail view of detail V in Figure 4 .

[0042] Corresponding parts are marked with the same reference symbols in all figures.

[0043] The Figures 1 to 4 They show, by way of example, different embodiments of a pressure vessel 1. Figure 5 shows a detailed view of the in Figure 4 marked details V of the in Figure 4The illustrated embodiment. The pressure vessel 1 includes a valve 6.

[0044] Pressure vessel 1 is, in particular, a pressurized gas container and is designed to hold a gas under high pressure. Specifically, pressure vessel 1 is a so-called gas cartridge, especially for use as a beverage dispenser.

[0045] The pressure vessel 1 has a vessel body 3 with a vessel bottom 4 arranged at a lower end and in particular formed integrally with the vessel body 3.

[0046] At an upper end, and thus opposite the container bottom 4, the container body 3 has an end region 2, which is formed integrally with the container body 3. The end region 2 has a container opening O.

[0047] The container bottom 4, the container body 3 and the end area 2 are designed in particular as a homogeneous, one-piece component without joining points and are manufactured together in a forming process, for example a roll forming process, from a material blank, for example from an aluminum blank or another material.

[0048] For a media-tight coupling of the pressure vessel 1 with an application, in particular a beverage dispenser, the vessel 1 has, for example, a connection geometry incorporated on the outside of a wall 2.1 surrounding the vessel opening O of the end section 2. This connection geometry is designed, for example, as an external thread, such as a so-called ACME thread. The wall 2.1, in particular with regard to the connection geometry, forms a connection which is configured to be media-tightly coupled to a corresponding further connection of the application. The connection geometry is produced, for example, during the forming of the end section 2 in the forming process and / or by machining after forming and / or by applying material and / or other suitable methods.

[0049] The pressure vessel 1 further comprises a valve 6, which is designed in particular as a check valve. This valve 6 is arranged at least partially within the end region 2. For this purpose, the pressure vessel 1 has a mounting structure for the valve 6 formed on the inside of the wall 2.1 surrounding the vessel opening O of the end region 2. The mounting structure has, in particular, an internal thread arranged on the inside of the wall 2.1. The valve 6, in the illustrated example a valve body 6.7 of the valve 6, has an external thread corresponding to the internal thread of the mounting structure.

[0050] In the illustrated example, the valve 6 comprises the valve body 6.7. In the illustrated example, the valve body 6.7 comprises a lower part 5 and an upper part 7. The valve body 6.7, in particular its lower part 5, is arranged with a collar-shaped section at the container opening O of the end region 2. Extending from the container opening O and from this collar-shaped section, the valve body 6.7, in particular its lower part 5, projects into the end region 2.

[0051] The valve body 6.7, in particular its lower part 5, is in a media-tight seal against the end region 2. For this purpose, the diameter of the collar-shaped section is larger than the opening diameter of the container opening O of the end region 2, whereby a contact surface facing the end region 2 is formed on the collar-shaped section, which rests against an end face of the end region 2.

[0052] The valve body 6.7 has a through-hole DO extending axially through the valve body 6.7, which is fluidically connected to an interior chamber 8 of the pressure vessel 1. In the illustrated example, this through-hole DO extends through the lower part 5 and the upper part 7. The valve 6 also has a valve plunger 6.3. The valve plunger 6.3 is located in the through-hole DO and seals it media-tight in a closed valve position. In an open valve position, the valve plunger 6.3 releases the through-hole DO.

[0053] For actuation in an application, the valve plunger 6.3 is moved downwards into the open valve position by the application, for example by means of an actuating unit of the application, thereby opening the through-hole DO. As a result, the medium, in particular a gas, flows from the interior of the vessel 8 through the through-hole DO out of the pressure vessel 1 and into the application connected to the pressure vessel 1.

[0054] The pressure vessel 1 has a suction pipe 9, which is arranged inside the vessel 8 and is firmly and fluid-tightly connected, in particular by positive locking, material locking, and / or force locking, to the valve 6, especially to the valve body 6.7, in the illustrated example to its lower part 5. In the illustrated examples, the suction pipe 9 is arranged section by section in the through-opening DO, for example, screwed into it. A section of the suction pipe 9 is fluidically connected to the through-opening DO of the valve 6. The suction pipe 9 extends towards the vessel bottom 4 into a region of the vessel bottom 4 and has a pipe opening 10 in this region.

[0055] The pressure vessel 1, in particular a pressurized gas vessel, enables a direct, media-tight coupling of the pressure vessel 1 with another connection, for example, a connection of an application. For actuation in the application, the valve plunger 6.3 is moved into the open valve position by the application, for example, by means of an actuating unit of the application. As a result, the medium flows from the interior of the vessel 8 out of the pressure vessel 1 via the through-hole DO and into the application.

[0056] Pressure vessel 1 is particularly advantageous for a medium intended for introduction into a beverage, comprising a propellant T, in particular a propellant gas, and an aroma A. The propellant T is in particular carbon dioxide (CO₂). The aroma A comprises in particular at least one essential oil as a carrier substance. The medium is thus an aromatized propellant T.

[0057] Once the pressure vessel 1 is filled with such a medium, it can be used in an application by which the medium, in particular the carbon dioxide and the flavoring A, can be introduced into the beverage, for example, water. The application is thus a device for simultaneously carbonating and flavoring the beverage, for example, water, and is therefore also referred to as a water carbonator or beverage carbonator. The pressure vessel 1 is also referred to as a gas cartridge.

[0058] To fill the pressure vessel 1 with such a medium, it may be provided, for example, that the components of the medium, i.e., the propellant T, in particular carbon dioxide, and the flavoring A, are mixed before filling the pressure vessel 1 and filled together, or that they come together only inside the pressure vessel 1. That is, it may also be provided that the pressure vessel 1 is filled sequentially with these components of the medium, for example, first with flavoring A and then with the propellant T, in particular carbon dioxide. The medium with which the pressure vessel 1 is then filled, and which is then intended for introduction into a beverage, then contains carbon dioxide and flavoring A.

[0059] After filling, the propellant T is present in a liquid supercritical state FZ in the lower two-thirds of the interior of the vessel 8. Above this, it is initially in a transition phase P between the liquid and gaseous states, and above that, in the gaseous state GZ. After filling the pressure vessel 1, the flavor A collects at the bottom of the vessel 4 or mixes only with the liquid supercritical portion of the propellant T. However, this is not a problem with the solution described here, because either the flavor A or the flavor A and the liquid supercritical propellant T are drawn in from this area of ​​the vessel bottom 4 via the suction tube 9, become gaseous as they rise in the suction tube 9, and are then discharged in the gaseous state through the valve 6 from the interior of the vessel 8 and introduced into the beverage.A flow of propellant T and aroma A through the suction pipe 9 and the valve 6 is in the . Figures 1 to 5 represented by flow arrows SP.

[0060] The suction tube 9 is specifically designed to draw in liquid propellant T and flavoring A, particularly liquid propellant T mixed with flavoring A. As mentioned, this flavored propellant T changes from a liquid to a gaseous state during its ascent to valve 6 and then exits through the open valve 6 into the application, i.e., the beverage carbonator. This results in optimal carbonation and flavoring of the beverage, for example, water.

[0061] For this purpose, the suction pipe 9 is, as described, firmly and tightly connected to the valve 6 and is designed such that the liquid, in particular flavored, propellant T drawn from the area of ​​the container bottom 4 transitions into the gaseous state during its ascent. For this purpose, the suction pipe 9 is designed such that it always has the pipe opening 10 in the area of ​​the container bottom 4.

[0062] In further embodiments, described in more detail below, it can be provided that the suction pipe 9 is designed in such a way that it draws in the propellant T, which is in the gaseous state GZ, from the upper area, in particular the upper third, of the interior of the container 8 and, in particular by means of the Venturi effect, draws in the aroma A via the pipe opening 10 in the area of ​​the bottom of the container 4, thereby also achieving the optimal mixture of aroma A and propellant T and thus the optimally aromatized propellant T.

[0063] In one possible embodiment, the pipe opening 10 is formed at one end of the suction pipe 9 and thus forms a pipe end opening 11, as shown in the Figure 1 and 2 This is shown. This is a particularly simple embodiment of the suction pipe 9 to manufacture. If the pipe end is straight, i.e., if an opening cross-section of the pipe opening 10 is oriented perpendicular to the longitudinal axis of the suction pipe 9, the pipe end is arranged at a distance from the bottom of the container 4, but, as described, within the area of ​​the bottom of the container 4. This ensures that the pipe opening 10 is not closed off by the bottom of the container 4.

[0064] In one possible embodiment, the pipe end is inclined, i.e., the opening cross-section of the pipe opening 10 runs at an angle to the longitudinal axis of the suction pipe 9. This ensures that even if the suction pipe 9 extends to the bottom of the container 4, the pipe opening 10, which is also formed at the pipe end and thus constitutes the pipe end opening 11, is not closed off by the bottom of the container 4.

[0065] In one possible embodiment, an end region of the suction pipe 9 is funnel-shaped towards the pipe end, as shown in Figure 2 shown. The pipe opening 10, located at the end of the pipe and thus forming the pipe end opening 11, therefore has a smaller cross-section than the other areas of the suction pipe 9. This results in optimized suction of the aroma A and / or the liquid propellant T.

[0066] In one possible embodiment, at least one wall opening 12 is formed in an upper region of the suction pipe 9, for example in the form of a slot or a bore. For example, several such wall openings 12 are provided, as shown in Figure 3 The pipe opening 10 is specifically designed as a pipe end opening 11 at the end of the suction pipe 9. When the valve 6 is opened, the propellant T, which is in the gaseous state GZ, is drawn in from the upper area, particularly the upper third, of the interior of the container 8 via the at least one wall opening 12 or the multiple wall openings 12. Furthermore, particularly through the Venturi effect, the aroma A is drawn in via the pipe opening 10 in the area of ​​the bottom of the container 4, thereby achieving the optimal mixture of aroma A and propellant T and thus the optimally flavored propellant T.

[0067] In one possible embodiment, the suction pipe 9 is U-shaped, with the pipe end being arranged in an upper region of the interior of the container 8, as shown in Figure 4 shown. The pipe opening 10, which is located in the area of ​​the container bottom 4, is therefore not formed at the pipe end, i.e., this pipe opening 10 is not identical with the pipe end opening 11, but rather the pipe opening 10 is formed in the lower area of ​​the U-shape, in particular at the lowest point of the U-shape, as shown in detail in Figure 5The pipe end naturally also has the pipe end opening 11 at the pipe end, in addition to the pipe opening 10. When the valve 6 is opened, the propellant T, which is in the gaseous state GZ, is drawn in from the upper area, particularly the upper third, of the interior of the container 8 via the pipe end opening 11 and, particularly due to the Venturi effect, the aroma A is drawn in via the pipe opening 10 in the area of ​​the bottom of the container 4, thus achieving the optimal mixture of aroma A and propellant T and therefore the optimally flavored propellant T.

[0068] The valve 6 further comprises a spring element 6.5, for example a coil spring, which presses the valve tappet 6.3 axially upwards, i.e., towards the container opening O, and thus against the upper part 7 of the valve body 6.7. In the illustrated example, the spring element 6.5 is compressed when the valve tappet 6.3 moves from the closed valve position to the open valve position. For this purpose, one end of the spring element 6.5 rests against the lower part 5 of the valve body 6.7 and the other end against the valve tappet 6.3.

[0069] The valve body 6.7 and / or the valve tappet 6.3 are, for example, each made of aluminium or brass or another material. REFERENCE MARK LIST

[0070] 1 Pressure vessel 2 End section 2.1 Wall 3 Vessel body 4 Vessel bottom 5 Lower part 6 Valve 6.3 Valve plunger 6.5 Spring element 6.7 Valve body 7 Upper part 8 Vessel interior 9 Suction pipe 10 Pipe opening 11 Pipe end opening 12 Wall opening A Aroma DO Passage opening FZ Liquid supercritical state GZ Gaseous state O Container opening P Transition phase SP Flow arrow T Propellant

Claims

1. Pressure vessel (1) comprising: - a vessel body (3), wherein an end region (2) is formed integrally with the vessel body (3) at an upper end, which has a vessel opening (O), and wherein the vessel body (3) has a vessel bottom (4) arranged at a lower end and formed integrally with the vessel body (3), - a valve (6) which is arranged in and / or on the end region (2), characterized by - a suction pipe (9) which is arranged in a container interior (8) and is rigidly and fluid-tightly connected to the valve (6), wherein a pipe interior of the suction pipe (9) is fluidically connected to a through-opening (DO) of the valve (6) and wherein the suction pipe (9) extends towards the container bottom (4) into a region of the container bottom (4) and has a pipe opening (10) in the region of the container bottom (4), wherein the pressure vessel (1) is filled with a propellant (T) and an aroma (A).

2. Pressure vessel (1) according to claim 1, characterized by the fact that the container bottom (4) is plano-concave with a flat outer surface and an inwardly curved inner surface.

3. Pressure vessel (1) according to claim 1 or 2, characterized by the fact that In a filled state, the propellant (T) is in a liquid supercritical state (FZ) in the lower two thirds of the container interior (8), above that in a transition phase (P) between liquid and gaseous states and above that in a gaseous state (GZ), with the aroma (A) collecting at the bottom of the container (4) or only mixing with the liquid supercritical part of the propellant (T).

4. Pressure vessel (1) according to any one of the preceding claims, characterized by the fact thatthe suction pipe (9) is designed such that when the valve (6) is opened, the propellant (T) in the gaseous state can be drawn in from the upper area of ​​the container interior (8) and the aroma (A) can be drawn in through the pipe opening (10) by the Venturi effect.

5. Pressure vessel (1) according to any one of the preceding claims, characterized by the fact that the pipe opening (10) is located in a lower tenth of the interior of the container (8).

6. Pressure vessel (1) according to any one of the preceding claims, characterized by the fact that the pipe opening (10) is formed at one end of the suction pipe (9).

7. Pressure vessel (1) according to any one of the preceding claims, characterized by the fact that an end area of ​​the intake pipe (9) is funnel-shaped in the direction of the pipe end or that the pipe end is inclined.

8. Pressure vessel (1) according to any one of claims 1 to 5, characterized by the fact thatthe suction pipe (9) is U-shaped, with the pipe end being located in an upper area of ​​the interior of the container (8).

9. Pressure vessel (1) according to claim 6, characterized by the fact that the end of the pipe is located in an upper third of the interior of the container (8).

10. Pressure vessel (1) according to any one of the preceding claims, characterized by the fact that in an upper area of ​​the suction pipe (9) at least one wall opening (12) is formed in a pipe wall of the suction pipe (9).

11. Pressure vessel (1) according to claim 10, characterized by the fact that which at least one wall opening (12) is arranged in an upper third of the interior of the container (8).

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