Water filter cartridge having two concentrically arranged water filter cartridge outlets

Abstract

The invention relates to a water filter cartridge, in particular for use in a water tank, characterized in that the water filter cartridge comprises two water filter cartridge outlets arranged concentrically to each other.

Description

Technical Field

[0001] The present invention relates to a water filter cartridge according to the preamble of claim 1. Background Technology

[0002] Water treatment equipment is becoming increasingly popular. This includes both cold water treatment equipment and hot water treatment equipment.

[0003] Cold water treatment equipment can be, for example, a water dispenser. Hot water treatment equipment can be, for example, a coffee machine and / or a tea machine.

[0004] To ensure that the water treated by these devices / machines meets relevant health requirements, it is generally recommended to filter the water at least once with activated carbon before treatment, and if necessary, to remove unwanted flavorings.

[0005] For hot water treatment machines, a filtration section is usually specified to decalcify the water used, thereby protecting machine parts that come into contact with it, such as heating elements and pipes.

[0006] In the prior art, US 2004 / 0104161 A1 discloses a module for cleaning fluids, particularly water, including a water filter cartridge having inlets and outlets concentrically arranged for permeates and retentions.

[0007] JP 2014-138938 A discloses a water filter cartridge having water filter cartridge outlets arranged concentrically for treating water. Summary of the Invention

[0008] The objective of this invention is to provide a water filter and connection structure that can reliably supply water for both cold and hot treatment to a water treatment machine according to the prior art described in the introduction, while making the best use of the water tank volume for water storage.

[0009] The solution to this task is based on the preamble of claim 1, achieved through the features of its characterizing portion. Advantageous and beneficial designs are given in the dependent claims.

[0010] Therefore, the present invention relates to a water filter cartridge, wherein it comprises two water filter cartridge outlets arranged concentrically with each other.

[0011] This allows for the provision of two streams of water or filtrate within a single water filter cartridge, but directed through different processing sections for different applications (subsequent cold water treatment and subsequent hot water treatment in beverage preparation machines). Therefore, they can also be supplied by a single tank that collectively supplies water to both filtration sections of a single water filter cartridge.

[0012] When water is heated (hot water treatment), minerals precipitate from the water at temperatures exceeding 60°C, especially 65°C, and deposit on the surrounding surfaces, particularly in the form of lime. This negatively impacts the operation and lifespan of affected machine parts, ultimately harming the machine itself. On one hand, these deposits act as insulation, thus reducing heating efficiency; on the other hand, they increasingly reduce the effective cross-section of affected lines.

[0013] In contrast, when cold, unheated water is provided, for example, in the form of a drinking fountain, the effect of this calcification is relatively small. Therefore, the filtration requirements for the water supply used for this purpose can be correspondingly lower, but at least different from, the requirements for hot water treatment.

[0014] In order to make the best use of the filter material for hot water treatment, a separate first flow channel is provided through the filter cartridge of the water filter, particularly preferably for this purpose only. This flow channel leads to the outlet of the first filter cartridge. A second flow channel, which is technically separate from the first flow channel for supplying cold water treatment flow channel, leads to the outlet of the second filter cartridge.

[0015] To avoid such precipitation and calcium deposition, the first flow channel or flow path through the filter cartridge of the water filter, which is specified for supplying water for subsequent hot water treatment in the machine, may accordingly include a filter chamber with a decalcifying agent through which the water to be treated will flow, and the filter chamber may in particular contain an ion exchanger.

[0016] To connect the outlets of two separately designed water filter cartridges to the water tank for this purpose, only a single water-guiding connector is needed to draw out the two separate water flows from the filter cartridges. This connector has two passages that are technically separate from each other in the piping.

[0017] The advantage of this approach is that the two separately designed water passages only need to be sealed at the common contact point between the water filter cartridge and the water tank. This is much easier and more reliable than having two separate water passages designed to be simultaneously and correctly oriented at all times to avoid unwanted leaks at the connection area, especially when separating and reassembling the water tank from a beverage preparation machine that uses both the water tank and the water filter cartridge.

[0018] This is important because the water tank is typically removed from the beverage preparation machine, filled with water, and then reconnected to the machine via a water-leading connection during each refilling process. Here, every effort should be made to prevent water from leaking from the water tank and / or filter cartridges between the water tank and the machine and undesirably wetting the water tank connection area of ​​the machine.

[0019] Such leaking water is not only unsightly and inconvenient to use, but should be removed for hygiene and appearance reasons alone. It can also jeopardize the reliable operation of the machine, in ways that water seeping into the machine may damage machine parts, or in some cases, may pose a risk of electric shock to the user due to water coming into contact with electrical wires.

[0020] The first of two concentrically arranged filter cartridge outlets can be arranged to be at least axially, and preferably radially, movable within the housing of the filter cartridge.

[0021] As a result, it can be securely and reliably connected to a complementary sealing element, which is also movable but positioned on the water tank, and can be designed in particular as a spring-loaded water tank outlet valve. Here, the outlet of the first filter cartridge is preferably designed to connect to the valve stem of the associated water tank outlet valve.

[0022] The water tank outlet valve is preferably a water tank outlet valve assigned to the outer second water filter cartridge outlet of two water filter cartridges arranged concentrically with each other.

[0023] By giving the outlet of the first filter cartridge mobility, it can follow the opening and closing movement of the tank outlet valve relative to the tank without any relative positional change between the tank outlet valve and the filter cartridge outlet.

[0024] This means that when the valve stem of the second water tank outlet valve is actuated, the valve opens and thus opens the outlet of the second water filter cartridge, which is used to remove water that has been treated through the second water filter channel when the water tank is filled accordingly.

[0025] Here, the outlet of the first water filter cartridge can move together with the valve stem of the second water tank outlet valve. The outlet of the first water filter cartridge is sealed by another water tank outlet valve assigned to the outlet of the first water filter cartridge, which is concentrically arranged within the water tank outlet valve assigned to the outlet of the second water filter cartridge.

[0026] The other tank outlet valve assigned to the outlet of the first water filter cartridge is called the first tank outlet valve, to unify the relationship between the different components and to understand the assignment relationship by referring to the first flow channel through the water filter cartridge. The corresponding situation applies to the tank outlet valve assigned to the second flow channel and therefore called the second tank outlet valve, as well as to all other components downstream of the corresponding flow channel up to the beverage preparation machine for water supply.

[0027] The outlet of the first filter cartridge, which can be movably arranged, may be designed with a tubular section as a plug component for waterproof interaction with the complementary filter cartridge connection components arranged on the side of the water tank, particularly the water tank outlet valve.

[0028] The tubular section at the outlet of the water filter cartridge is preferably made of a softer material than the complementary water filter cartridge connecting parts arranged on the side of the water tank, especially the water tank outlet valve. Therefore, it can be manufactured with a very precise fit (if necessary, slightly dimensionally over- or under-sized) relative to the complementary valve parts, preferably its valve stem, and inserted or plugged into it.

[0029] In a design where the outlet of the first water filter cartridge is designed to be inserted into a receiving opening constructed in the water tank outlet valve, the radial outer wall of its tubular section forms a sealing surface for contacting the radial inner surface of a complementary receiving opening on the water tank outlet valve. Due to the relatively soft material and, where necessary, a slight dimensional interference fit, the tubular section can form a particularly robust and well-sealed press-fit with the receiving opening on the water tank valve.

[0030] The clamping force of this press fit is so great that it reliably counteracts the pulling force that may occur when the tank valve is temporarily stuck on the equipment side during removal of the tank from the beverage preparation machine.

[0031] In another design, the outlet of the first filter cartridge is designed to be pluggable into the tank outlet valve, preferably into its valve stem. Here, the radial inner wall of its tubular section forms a sealing surface for contacting the radial outer surface of a complementary receiving portion on the tank outlet valve. Here, due to the relatively soft material and, if necessary, insufficient size, the tubular section can also form a particularly robust and well-sealed press-fit with the receiving opening on the tank valve, and reliably withstand the pull-out of the filter cartridge outlet as described with respect to the preceding embodiments.

[0032] In this design, the tubular section can also form a sealing surface that acts radially relative to a complementary filter cartridge connection component arranged on the side of the water tank. In this case, its radial inner surface abuts against the radial outer surface of the water tank outlet valve.

[0033] The first of two concentrically arranged filter cartridge outlets is assigned to a first flow channel formed by the filter cartridge, and the second filter cartridge outlet is assigned to a second flow channel formed by the filter cartridge, which is constructed at least partially separate from the first flow channel.

[0034] The first flow channel includes a filter chamber arranged to be at least axially, and preferably radially, movable within the housing of the water filter cartridge. As a result, the outlet of the first water filter cartridge can be securely connected to the filter chamber, for example, in the form of an outlet pipe formed on the filter chamber. As described above, it can be securely connected to the water tank outlet valve, for example, via a plug connection.

[0035] Spacer ribs and / or spacer protrusions, etc., can be constructed on the movably arranged filter chamber and / or in a complementary receiving cavity for the filter chamber in a water filter cartridge to space them apart from each other. This ensures a desired flow cross-section between the wall of the receiving cavity and the housing of the filter chamber movably arranged therein, which may, for example, be part of a second flow channel of the water filter cartridge.

[0036] Preferably, the complementary receiving cavity for the filter chamber is designed as a flow cavity without filter material, as part of the second flow channel. As a result, the filter chamber can be movably arranged in the receiving cavity as unobstructed as possible, and follows the movement of the tank valve in the manner described above.

[0037] Preferably, a check valve is arranged in at least one of the two flow channels. As a result, a safety component can be provided in the filter element to prevent unwanted backflow from the downstream piping area used for the relevant flow channel, and in particular to prevent unwanted backflow from the other flow channel.

[0038] Particularly preferably, a check valve is also arranged in the second of the two flow channels. Therefore, for both flow channels, it can be reliably ensured that liquid is not drawn back from the downstream area.

[0039] The filter cartridge may also have a retaining component on the filter element side for interaction with a complementary retaining component on the tank side, particularly in the form of a bayonet lock. This provides a fixed connection between the filter cartridge and the tank. It also provides positional stability and thus positively impacts the effectiveness of the sealing components formed and / or arranged on the filter cartridge and the tank.

[0040] Ion exchange materials can be arranged in the filter chamber. Using ion exchange materials, the water guided on it can be decalcified, so that no or at least a small amount of calcium carbonate crystals are formed during subsequent heating.

[0041] Water filter cartridges may also include granular filters and / or activated carbon filters. Granular filters prevent coarse impurities, while activated carbon filters ensure that the water passing through the filter cartridge is safe to drink.

[0042] The complementary filter cartridge connection components located on the tank side (specifically designed as tank outlet valves) should be designed as dual valves with valve passages arranged concentrically with each other. This allows the filter cartridges and their two equally concentrically arranged filter cartridge outlets to be connected to a single connection component, which, as mentioned above, greatly improves the reliability of the connection seal.

[0043] The two valves in the dual-valve system each constitute a spring-loaded valve. As a result, they can seal the water tank in an unloaded state due to the closing force exerted by their respective springs on their respective valve stems. The water tank can be filled with water to be stored. The relevant valve can only open against the spring force when at least one of these valve stems is pressed, and if necessary, the water stored in the tank can be drained, or, in connection with a beverage preparation machine, extracted from the tank by the machine.

[0044] To provide a reliable connection between the water tank and the beverage preparation machine, a tank-side device connector with two concentrically arranged outlets is preferably constructed on the water tank. This tank-side device connector is preferably designed to complement a tank-side connection component and thus can cooperate with that component to supply water to the beverage preparation machine.

[0045] This water treatment machine includes a complementary water tank connector disposed on or potentially disposed on the equipment side, which is complementary to the equipment connector on the water tank side of a water tank having two outlets arranged concentrically with each other according to one of the above embodiments.

[0046] When the water tank is connected to the beverage preparation machine, the tank connector on the equipment side opens and engages with the two valves of the dual-valve system, allowing the machine to draw treated water from the tank through two different filtration stages via the filter cartridge. One stage is for preparing cold beverages, and the other is for preparing hot beverages. Attached Figure Description

[0047] The invention will now be explained in more detail with reference to the accompanying drawings.

[0048] Exemplary and illustrative:

[0049] Figure 1 A partial cross-sectional view of a water tank containing a water filter cartridge, the water filter cartridge having two water filter cartridge outlets arranged concentrically with each other, and having a machine connection part on the side of the water tank and a machine connection part on the side of the water tank spaced apart therefrom.

[0050] Figure 2 :and Figure 1 Same view, but connecting parts are joined together;

[0051] Figure 3 Similar to Figure 2 The view is in the image, but the focus is on the filter cartridge, which has two hydraulically separated flow channels and two concentrically arranged filter cartridge outlets to provide filtrate streams for two different treatments. Detailed Implementation

[0052] Accordingly, Figure 1 A partial cross-sectional view of a water tank 1 in which a water filter cartridge 2 is installed is shown.

[0053] The filter cartridge 2 has two concentrically arranged filter cartridge outlets, namely a first inner filter cartridge outlet 2.1 and a second outer filter cartridge outlet 2.2. These filter cartridge outlets are assigned to two hydraulically separated flow channels that guide the flow through the filter cartridge 2, namely a first flow channel 3 and a second flow channel 4.

[0054] The filter cartridge 2 is supplied with water 6 stored in the water tank 1 through its inlet 5. The direction of water flow 6 is symbolically indicated by arrow 6.1.

[0055] The water tank 1 includes a machine connection component 7 extending away from its bottom 1.2 on the tank side. This machine connection component 7 is sleeve-shaped and configured for a sealing connection with a machine-side water tank connection component 8, which is shown spaced apart from the water tank 1. For a sealing interaction between the water tank and the beverage preparation machine, the water tank connection component 8 has a complementary recess / receiving portion 8.3 for accommodating the machine connection component 7. To improve the sealing effect of this connection, a sealing component 8.3.1, such as an O-ring, can be provided between the machine connection component 7 and the recess / receiving portion 8.3. This sealing component 8.3.1 is preferably arranged at the recess / receiving portion 8.3.

[0056] In addition, the machine connection component 7 also includes two water tank outlet valves 7.1 and 7.2 arranged concentrically therein. The concentric inner water tank outlet valve 7.1 is designed to open and close the first flow channel 3 through the filter cartridge 2. The concentric outer water tank outlet valve 7.2 is designed to open and close the second flow channel 4 through the filter cartridge 2, which is constructed separately from the first flow channel.

[0057] The first water tank outlet valve 7.1 is arranged in the component of the machine connection part 7, which itself serves as the valve stem of the second water tank outlet valve 7.2. It includes a valve seat, which is preferably designed as part of the second water tank outlet valve 7.2. The valve stem of the first water tank outlet valve 7.1 is concentrically received in the opening of the valve stem of the second water tank outlet valve 7.2, and is in particular abutted against the valve seat in a sealing manner by means of a return spring. To improve the sealing effect, an O-ring type sealing element is provided between the valve seat and the valve stem in this design.

[0058] The first water tank outlet valve 7.1 is designed to move together with the valve stem of the second water tank outlet valve 7.2 in a sealed state. That is, when the valve stem of the second outer water tank outlet valve 7.2 is actuated and lifted, i.e. pressed against the inside of the water tank, for example by placing the machine connection component 7 on the water tank side onto the complementary actuating component 8.2 of the water tank connection component on the equipment side, this has virtually no effect on the closed state of the first inner water tank outlet valve 7.1. From the resting position, the water tank outlet valve remains closed.

[0059] In order to ensure a durable and reliable seal between the connecting pipes in the form of a tubular section 2.1.1 at the outlet 2.1 of the first water filter cartridge (even if the first water tank outlet valve 7.1 assigned to it undergoes such at least axial positional change) when the filter cartridge 2 is installed in the water tank 1, the filter chamber 3.1 connected to it is also arranged at least axially in the receiving cavity of the filter cartridge 2.

[0060] This has the effect that, regardless of the closed state of the second external water tank outlet valve 7.2, the first internal water tank outlet valve 7.1 remains closed during normal operation until it is activated by the complementary actuating component 8.1 on the equipment-side water tank connection component 8. Furthermore, this is only possible during normal operation when the water tank is placed on the machine-side water tank connection component.

[0061] Therefore, even in the event that the second water tank outlet valve 7.2 might get stuck on the water tank connection component 8 on the machine side when the water tank 1 is removed, a reliable sealing effect between the first water tank outlet valve 7.1 and the tubular section 2.1.1 is guaranteed. This is because by allowing the filter chamber 3.1 adjacent to the tubular section 2.1.1 to move axially and be arranged elevated in the filter cartridge 2 during operation, any possible pulling force on the connection between the first water tank outlet valve 7.1 and the tubular section 2.1.1 is prevented.

[0062] If the second water tank outlet valve 7.2 gets stuck when the water tank 1 is removed and therefore does not immediately release, the axial clearance of the filter chamber 3.1 ensures that the section 2.1.1, which is securely connected to it, has sufficient relative freedom of movement relative to the filter element 2. This allows the section to participate in the relative movement of the second water tank outlet valve 7.2 relative to the filter cartridge 1 until the valve stem of the second water tank outlet valve 7.2 is forcibly released from the recess / receiver 8.3 of the water tank connection component 8 on the machine side. This is due to the sealing area of ​​the valve stem being mechanically positioned on the valve seat, which restricts the range of movement of the first valve stem. Once the valve stem is against the valve seat, it must be moved out of the recess / receiver 8.3 of the water tank connection component on the machine side.

[0063] Therefore, water can only be discharged from the water tank 1 through the first filter channel 3 when the water tank outlet valve 7.1 is properly raised by the actuating component 8.1.

[0064] In the filter chamber 3.1, a decalcifying agent, such as an ion exchanger, may be provided to treat the water 6, which will be treated by the filter cartridge 2, to prevent sedimentation when the water is heated to prepare a hot beverage. Preferably, another filtration section, such as an activated carbon filter for sterilization and / or flavor improvement, has been pre-positioned upstream of the filter chamber 3.1 in the filter cartridge 2, and is particularly used to treat the water 6 flowing through the filter chamber 3.1 via the flow channel 4.

[0065] The valve stem of the second water tank outlet valve 7.2, when the water tank 1 is detached from the water tank connection component 8 on the machine side, preferably also uses a central sealing component, particularly an O-ring, to seal against the valve seat of the second water tank outlet valve 7.2 by means of a return spring. The second water tank outlet valve 7.2, when installed in the water tank, closes or opens the flow channel 4 of the water filter cartridge 2, as... Figure 1 As shown in the diagram, the flow channel 4 extends between the outer wall of the filter chamber 3.1 and the inner wall of the receiving cavity 4.1. The filter chamber 3.1 is arranged to be at least axially movable within the filter element 2, and the receiving cavity 4.1 movably accommodates the filter chamber 3.1 (see also...). Figure 3 ).

[0066] In order to connect the machine to the water tank side, part 7 (see...) Figure 2 To improve the sealing effect to the outside, a sealing component 8 can be provided between the machine connecting component 7 and the complementary recess / accommodating portion in the machine-side water tank connecting component 8. Preferably, this sealing component 8.3.1 is also in the form of an O-ring. To improve the sealing effect to the inside, a sealing component 8.1.1 can be arranged, preferably also in the form of an O-ring.

[0067] For completeness, the beverage preparation machine 10 is schematically shown at two lines 9.1 and 9.2, extending from the water tank connection member 8 on the machine side, for conveying two hydraulically separated filtrate streams from flow channels 3 and 4. The filtrate stream from flow channel 3 enters line 9.1 centrally via the water tank connection member 8 on the machine side. The filtrate stream from flow channel 4 is conveyed to line 9.2 through a cavity 8.3.2 formed by a recess / receiving portion 8.3.

[0068] Inside the water tank 1, the filter cartridge 2 is connected to the filter cartridge connecting component 1.1 on the water tank side via the water tank connecting component 2.4 on the filter cartridge side. Preferably, the connecting components are two complementary, interlocking sleeve-shaped members. To improve the sealing effect, a sealing component 2.4.1 can be arranged between them, for example, in the form of an O-ring.

[0069] In order to be fixed to the water tank 1, the filter cartridge 2 may have a fixing part 2.4.2 on the filter element side for interacting with the complementary filter cartridge fixing part 1.1.1 on the water tank side, in particular in the form of a bayonet lock.

[0070] Figure 2 The water tank 1, with its filter cartridge 2 housed therein, is also shown partially and in cross-section, but with... Figure 1 In contrast, the machine connection part 7 on the water tank side is connected to / inserted into the water tank connection part 8 on the machine side.

[0071] The valve stem of the first water tank outlet valve 7.1 rests against the starting component 8.1, and the valve stem of the second water tank outlet valve 7.2 rests against the starting component 8.2, thereby opening the two water tank outlet valves of water tank 1.

[0072] The tubular section 2.1.1 of the first water filter cartridge outlet 2.1 is made of a softer material than the complementary water filter cartridge connecting part 1.1 arranged on the tank side. It is sealed to the latter by means of an insert. In this example, the tubular section 2.1.1 is inserted into the recess of the valve stem of the second radially outer water tank outlet valve of the two water tank outlet valves 7.1 and 7.2 arranged concentrically. Alternatively, the tubular section 2.1.1 may also be designed so that it can be sealed onto the valve stem of the second water tank outlet valve 7.2.

[0073] Figure 3 The water tank 1, with its filter cartridge 2 installed therein, is shown again in partial and cross-sectional view, as... Figure 2 As in the previous example, the focus here is on filter element 2, which is shown over the entire height of its housing 2.3.

[0074] A first filtering element and / or intercepting element 2.5, such as in the form of nonwoven fabric or screen, is arranged in the region of the inlet 5 of the filter element 2. Behind it, inside the housing 2.3, is a filter chamber 2.6, in which an activated carbon filter may be arranged, for example.

[0075] Water 6 flowing from water tank 1 into filter cartridge 2 flows through the filtration chamber 2.6 in the direction of arrow 6.2. On the inner side of the housing 2.3 of filter cartridge 2 opposite to inlet 5, another filtration and / or trapping component 2.7 is arranged, for example, also in the form of cloth or screen. This component may also have elastic properties, for example, to support other components to be housed in its housing during filter cartridge assembly, particularly under slight pre-tightening. This also results in enhanced sealing between the various components of filter cartridge 2 to prevent unwanted movement of particulate portions.

[0076] In the direction of water flow 6, inside the filter cartridge 2 of the water filter, the filtration chamber 2.8 is adjacent to the filter element and / or retention element 2.7. This filtration chamber may, for example, be equipped with a particulate filter and is closed downstream by additional filter elements and / or retention elements 2.9 to prevent leakage of filter material, but the water 6 to be treated can still pass through. The filtration chamber 2.8 can be designed as a padding member, and if necessary, includes two filter elements and / or retention elements 2.7 and 2.9.

[0077] The receiving cavity 4.1 follows the filter element and / or interception element 2.9 in the direction of water flow 6 according to arrow 6.3. The receiving cavity is defined by wall 4.1.1 and is waterproofly separated from the filter cavity 2.6.

[0078] Inside the receiving cavity 4.1, the filter cavity 3.1 is accommodated at least axially movable, but preferably also radially movable. The filter cavity 3.1 is waterproofly closed relative to the receiving cavity 4.1 by its wall 3.1.1 and its end cover members and bottom members 3.1.2 and 3.1.3.

[0079] An inlet opening 3.1.2.1 for entering the filter chamber 3.1 is provided on the cover component 3.1.2. An opening 3.1.3.1 is also provided on the bottom component 3.1.3. This opening is an outlet opening for discharging water that has undergone further treatment in the filter chamber 3.1. Another filter element and / or interception element are arranged at both the inlet and outlet openings to prevent filter media from leaking out of the filter chamber 3.1, while allowing water to flow through.

[0080] Around outlet 3.1.3.1, on the bottom 3.1.3 of filter chamber 3.1, a first water filter cartridge outlet 2.1, as described above, is formed in the form of a tubular section 2.1.1 and is fixedly connected thereto. It is made of a softer material than the valve stem of the second water tank outlet valve 7.2 and is clamped into its recess. As a result, the tubular section 2.1.1 and the filter chamber 3.1 to which it is fixedly connected can, particularly axially, but preferably also radially, participate in the movement applied to the valve stem of the second water tank outlet valve 7.2 when necessary by clamping the valve stem in the recess / receiving portion 8.3 when the water tank is removed from the water tank connection part 8 on the machine side.

[0081] Water 6, taken from the water tank and to be treated by the filter cartridge 2, flows through the filter sections 2.5 to 2.9 and into the inlet region of the receiving cavity 4.1 in the direction of arrows 6.1 to 6.3. In the inlet region of the receiving cavity 4.1, the water flow is divided into two hydraulically separated flow paths 3 and 4.

[0082] The first flow path 3 passes through the filter chamber 3.1 and the decalcifying agent, such as an ion exchanger, arranged therein. As a result, the water leaving the water tank 1 to prepare a hot beverage through the beverage preparation machine 10 is decalcified (see...). Figure 1 ).

[0083] The second flow path 4 guides the water 6, which has already been treated by the filtration sections 2.5 to 2.9, through the receiving cavity 4.1, around the filtration cavity 3.1, and to the outlet 2.2 of the second water filter cartridge. The water 6 guided via this flow path 4 is intended for use in preparing cold drinks with the aid of the beverage preparation machine 10.

[0084] In order to position the filter chamber 3.1 at a certain distance from the wall 4.1.1 in the receiving cavity, ribs and / or protrusions or similar spacer members 4.1.2 are provided on the wall 4.1.1 and / or on the wall 3.1.1 of the filter chamber 3.1. Figure 3 In the example, such a spacer is shown in the entrance region of the receiving cavity.

[0085] To avoid backflow from the other of the two flow channels 3 and 4, a check valve may be arranged in at least one of the two flow channels, but preferably in both flow channels.

[0086] List of reference numerals

[0087] 1 water tank

[0088] 1.1 Water tank side filter cartridge connection components

[0089] 1.1.1 Fixing components on the side of the water tank

[0090] 1.2 Bottom

[0091] 2 Water Filter Cartridges

[0092] 2.1 First water filter cartridge outlet

[0093] 2.1.1 Tubular section

[0094] 2.1.1.1 Sealing surface

[0095] 2.2 Second water filter cartridge outlet

[0096] 2.3 Housing

[0097] 2.4 Water tank connection components on the filter element side

[0098] 2.4.1 Sealing components

[0099] 2.4.2 Fixing components on the filter element side

[0100] 2.5 Filtering components and / or trapping components

[0101] 2.6 Filter chamber / activated carbon

[0102] 2.7 Filtering components and / or trapping components

[0103] 2.8 Filter chamber

[0104] 2.9 Filtering components and / or trapping components

[0105] 3 First Flow Path

[0106] 3.1 Filter chamber

[0107] 3.1.2 Cover

[0108] 3.1.3 Bottom

[0109] 3.1.3.1 Exports

[0110] 4 Second Flow Path

[0111] 4.1 Receiving cavity

[0112] 4.1.1 Wall

[0113] 4.1.2 Ribs / Protrusions / Spacers

[0114] 5 entrances

[0115] 6 water

[0116] 6.1 Arrow

[0117] 6.2 Arrow

[0118] 6.3 Arrow

[0119] 7. Machine connection parts on the side of the water tank

[0120] 7.1 First water tank outlet valve

[0121] 7.2 Second water tank outlet valve

[0122] 8. Water tank connection components on the machine side

[0123] 8.1 Starting Components

[0124] 8.1.1 Sealing components

[0125] 8.2 Starting Components

[0126] 8.3 Recess / Accommodation Section

[0127] 8.3.1 Sealing components

[0128] 8.3.2 cavity

[0129] 9.1 Pipeline

[0130] 9.2 Pipeline

[0131] 10 Beverage Preparation Machines / Equipment

Claims

1. A water filter cartridge (2), wherein, The filter cartridge (2) includes two concentrically arranged filter cartridge outlets (2.1; 2.2), characterized in that the first filter cartridge outlet (2.1) of the two concentrically arranged filter cartridge outlets (2.1; 2.2) is arranged to be at least axially movable in the housing (2.3) of the filter cartridge (2), wherein the movably arranged first filter cartridge outlet (2.1) is designed with a tubular section (2.1.1) as a plug component for waterproof interaction with a complementary filter cartridge connection component (1.1) arranged on the water tank side.

2. The filter cartridge of the water filter according to claim 1, characterized in that, The tubular section (2.1.1) is made of a softer material than the complementary filter cartridge connection component (1.1) arranged on the side of the water tank.

3. The filter cartridge of the water filter according to claim 1 or 2, characterized in that, The tubular section (2.1.1) forms a sealing surface that acts radially relative to the complementary filter cartridge connection component (1.1) arranged on the side of the water tank. 2.1.1.1）。 4. The filter cartridge of the water filter according to claim 1 or 2, characterized in that, The first filter cartridge outlet (2.1) of the two concentrically arranged filter cartridge outlets (2.1; 2.2) is assigned to a first flow channel (3) formed through the filter cartridge (2), and the second filter cartridge outlet (2.2) of the two concentrically arranged filter cartridge outlets (2.1; 2.2) is assigned to a second flow channel (4) of the filter cartridge (2), which is constructed at least partially separate from the first flow channel (3).

5. The water filter cartridge according to claim 4, characterized in that, The first flow channel (3) includes a filter chamber (3.1) arranged to be at least axially movable within the housing (2.3) of the filter cartridge (2).

6. The water filter cartridge according to claim 5, characterized in that, Spacer ribs and / or spacer protrusions are constructed on the movably arranged filter chamber (3.1) and / or in the complementary receiving chamber (4.1) of the filter chamber (3.1) in the filter cartridge (2) of the water filter to space the two chambers (3.1; 4.1) apart from each other.

7. The water filter cartridge according to claim 6, characterized in that, The complementary receiving cavity (4.1) for the filter cavity (3.1) is designed as a flow cavity without filter material, as part of the second flow channel (4).

8. The filter cartridge of the water filter according to claim 4, characterized in that, A check valve is arranged in at least one of the two flow channels (3; 4).

9. The water filter cartridge according to claim 8, characterized in that, A check valve is also arranged in the second of the two flow channels (3; 4).

10. The filter cartridge of the water filter according to claim 1 or 2, characterized in that, The filter cartridge (2) has a fixing member (2.4.2) on the filter element side for interacting with a complementary filter cartridge fixing member (1.1.1) on the tank side.

11. The filter cartridge of the water filter according to any one of claims 5 to 7, characterized in that, Ion exchange material is arranged in the filter chamber (3.1).

12. The filter cartridge of the water filter according to claim 1 or 2, characterized in that, The filter cartridge (2) of the water filter includes a particulate filter and / or an activated carbon filter.

13. The filter cartridge of the water filter according to claim 1 or 2, characterized in that, The complementary filter cartridge connection assembly (1.1) located on the side of the water tank includes a double valve with valves (7.1; 7.2) arranged concentrically with each other.

14. The water filter cartridge according to claim 13, characterized in that, The two valves (7.1; 7.2) of the dual valve each constitute a spring-loaded valve (7.1; 7.2).

15. The water filter cartridge according to claim 1, characterized in that, The filter cartridge (2) is used in the water tank (1).

16. The filter cartridge of the water filter according to claim 1, characterized in that, The first filter cartridge outlet (2.1) of the two concentrically arranged filter cartridge outlets (2.1; 2.2) is arranged to be radially movable within the housing (2.3) of the filter cartridge (2).

17. The filter cartridge of the water filter according to claim 1, characterized in that, The outlet (2.1) of the first water filter cartridge, which is movably arranged, is designed with a tubular section (2.1.1) for waterproof interaction with the water tank outlet valve (7.2).

18. The filter cartridge of the water filter according to claim 2, characterized in that, The tubular section (2.1.1) is made of a material that is softer than the water tank outlet valve (7.2).

19. The filter cartridge of the water filter according to claim 5, characterized in that, The filter chamber (3.1) is arranged to be radially movable within the housing (2.3) of the filter cartridge (2) of the water filter.

20. The water filter cartridge according to claim 10, characterized in that, The fixing component (2.4.2) on the filter element side is in the form of a bayonet lock.

21. The water filter cartridge according to claim 13, characterized in that, The complementary filter cartridge connection component (1.1) is designed as a water tank outlet valve.

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