WATER TANK WITH TANK OUTLET VALVE AND WATER FILTER CARTRIDGE WITH TWO CONCENTRIC WATER FILTER CARTRIDGE OUTLETS

Description

[0001] The invention relates to a water tank with a water filter cartridge and a water treatment device equipped therewith according to the preambles of claims 1 and 18. State of the art:

[0002] Water treatment devices are becoming increasingly popular. Both cold water treatment devices and hot water treatment devices are available.

[0003] Devices that produce cold water can be drinking water dispensers, for example. Devices that produce hot water can be coffee and / or tea makers, for example.

[0004] To ensure that the water treated with these devices / machines meets the relevant health requirements, the water used is usually filtered with activated carbon at least prior to this treatment, and if necessary also filtered to remove undesirable tastes.

[0005] Machines that process hot water usually also have a filter system to decalcify the water used and thus protect the machine parts that come into contact with it, such as the heating system and pipes.

[0006] The documents US 2020 / 369537 and GB 993 876 are relevant prior art.

[0007] Object and advantages of the invention: The object of the invention is to provide a water filter and connection structure with which a water treatment machine according to the prior art described in the introduction can be reliably supplied with water for both cold treatment and hot treatment, with the best possible utilization of the tank volume for water storage.

[0008] The problem is solved based on the preambles of claims 1 and 18 by their characterizing features. Advantageous and expedient embodiments are specified in the subclaims.

[0009] Accordingly, the invention relates to a Water tank with water filter cartridge, which are characterized in that the water filter cartridge comprises two water filter cartridge outlets arranged concentrically to one another.

[0010] This enables the provision of two water or filtrate streams, which are routed in a single water filter cartridge, however, for different application purposes (subsequent cold water preparation and subsequent hot water preparation in a beverage preparation machine) via different treatment lines, and are accordingly also supplied from one water tank that feeds both filter lines of the one water filter cartridge together.

[0011] When heating water (hot water preparation), minerals dissolve from the water at temperatures above 60°C, especially above 65°C, and deposit on the surrounding surfaces, particularly in the form of limescale. This adversely affects the operation and service life of the affected machine components and ultimately the machine itself. On the one hand, such deposits insulate and thus reduce the efficiency of the heating system; on the other hand, they increasingly reduce the effective cross-section of the affected pipes.

[0012] In contrast, this calcification effect plays a comparatively minor role when providing cold, unheated water, e.g., in the form of a drinking water dispenser. The filtration requirements for the feed water used for this purpose can therefore be correspondingly lower, or at least different, than those for hot water preparation.

[0013] To maximize the effectiveness of the filter material for hot water preparation, a first, separate flow channel is provided through the water filter cartridge, particularly preferably exclusively for this purpose. This flow channel opens into the first water filter cartridge outlet. A second flow channel, separate from the first, for supplying cold water preparation, opens into the second water filter cartridge outlet.

[0014] In order to avoid such precipitations and limescale deposits, the first flow channel or flow path through the water filter cartridge intended to feed the subsequent hot water preparation in the machine may accordingly comprise a filter chamber through which the water to be treated flows and which contains a descaling agent, which may in particular contain an ion exchanger.

[0015] To connect the two separately designed water filter cartridge outlets to the water tank, only a single water-conducting connection element with two separate pipes is required to discharge the two separate water streams from the water filter cartridge.

[0016] This has the advantage that two separately designed water lines only need to be sealed at a common contact point between the water filter cartridge and the water tank. This is much easier and more reliable to accomplish, especially when separating and reconnecting the water tank from and to a beverage preparation machine powered by the water tank and water filter cartridge, than, for example, with two separately designed water lines, which must always be simultaneously and correctly aligned to prevent unwanted water leakage in the connection area.

[0017] This is important because the water tank is typically removed from the beverage preparation machine for each refill, filled with water, and reconnected to the machine via a water line. This should prevent water from escaping from the water-conducting structure between the water tank and / or the water filter cartridge and the machine, which could undesirably contaminate the tank connection area of the machine.

[0018] This type of leakage not only has an unsightly, user-unfriendly effect, and should be removed for hygienic and aesthetic reasons alone. It can also jeopardize the reliable operation of the machine, as water could potentially damage parts of the machine if it penetrates, or even pose a risk of electric shock to the user if it comes into contact with electrical wiring.

[0019] The first of the two concentrically arranged water filter cartridge outlets can be arranged to be movable at least axially, preferably also radially, in the housing of the water filter cartridge.

[0020] This allows it to be firmly and reliably sealed to a complementary, likewise movable sealing element arranged on the water tank, which can be designed, in particular, as a spring-loaded water tank outlet valve. This first water filter cartridge outlet is preferably designed to be connectable to the valve tappet of the respective water tank outlet valve.

[0021] The water tank outlet valve is preferably the water tank outlet valve associated with the second, outer of the two concentrically arranged water filter cartridge outlets.

[0022] The mobility given to the first water filter cartridge outlet allows it to follow the opening and closing movements of the water tank outlet valve relative to the water tank without any relative position change between the water tank outlet valve and the water filter cartridge outlet.

[0023] This means that when the valve tappet of this second water tank outlet valve is actuated, this valve opens and thus releases the second water filter cartridge outlet, if the water tank is filled accordingly, for the removal of the water treated via the second water filter channel.

[0024] The first water filter cartridge outlet can move with the valve tappet of the second water tank outlet valve. The first water filter cartridge outlet is sealed by another water tank outlet valve associated with the first water filter cartridge outlet, which is arranged concentrically within the water tank outlet valve associated with the second water filter cartridge outlet.

[0025] This additional water tank outlet valve, assigned to the first water filter cartridge outlet, is referred to as the first water tank outlet valve to standardize the relationships between the various components and for more understandable assignment with reference to the first flow channel through the water filter cartridge. The same applies to the water tank outlet valve assigned to the second flow channel, which is thus referred to as the second water tank outlet valve, as well as to all other components for water supply downstream of the respective flow channel up to the beverage preparation machine.

[0026] The first, movably arranged water filter cartridge outlet can be designed in the manner of a plug-in element with a tubular section for watertight interaction with a complementary, tank-side water filter cartridge connection element, in particular the tank outlet valve.

[0027] The tubular section of the water filter cartridge outlet is preferably made of a softer material than the complementary water filter cartridge connection element located on the tank side, in particular the tank outlet valve. This allows it to be manufactured with a very precise fit, possibly slightly oversized or undersized, relative to the complementary valve element, preferably its valve stem, and inserted or plugged into it.

[0028] In a design in which the first water filter cartridge outlet is designed to be inserted into a receiving opening formed in the water tank outlet valve, the radially outer wall of its tubular section forms a sealing surface for engagement with the radially inner surface of the complementary receiving opening on the tank outlet valve. Due to the comparatively softer material and, if necessary, a slight oversize, the tubular section can form a particularly tight and well-sealing press fit with the receiving opening on the tank valve.

[0029] The fixing forces of this press fit are so great that they also reliably counteract any pulling effect that may occur during removal of the water tank from the beverage preparation machine if the tank valve on the device temporarily becomes stuck.

[0030] In another embodiment, the first water filter cartridge outlet is designed to be plugged onto the water tank outlet valve, preferably onto its valve stem. The radially inner wall of its tubular section forms a sealing surface for engagement with the radially outer surface of the complementary receiving part on the tank outlet valve. Here, too, the comparatively softer material and, if necessary, a slight undersize of the tubular section can form a particularly firm and tightly sealed press fit with the receiving opening on the tank valve and, as described for the previous embodiment, reliably resist removal of the water filter cartridge outlet.

[0031] In this design, the tubular section can also form a sealing surface that acts radially relative to the complementary water filter cartridge connection element located on the tank side. In this case, on its radially inner surface, which rests against a radially outer surface on the tank outlet valve.

[0032] The first of the two concentrically arranged water filter cartridge outlets is assigned to a first flow channel formed by the water filter cartridge and the second water filter cartridge outlet is assigned to a second flow channel formed by the water filter cartridge, which second flow channel is formed at least partially separately from the first flow channel.

[0033] The first flow channel comprises a filter chamber that is movably arranged at least axially, and preferably also radially, within the housing of the water filter cartridge. This allows the first water filter cartridge outlet to be firmly connected to the filter chamber, e.g., in the form of an outlet nozzle molded onto the filter chamber. This outlet nozzle can be firmly connected to the tank outlet valve, e.g., by means of a plug connection, as described above.

[0034] Spacer ribs and / or spacer studs or the like can be formed on the movably arranged filter chamber and / or in a complementary receiving chamber for the filter chamber in the water filter cartridge to space the two apart. This ensures a desired flow cross-section between the wall of the receiving chamber and the housing of the movably arranged filter chamber, which can, for example, be part of the second flow channel of the water filter cartridge.

[0035] Preferably, the complementary receiving chamber for the filter chamber is designed as a flow chamber free of filter material as part of the second flow channel. This allows the filter chamber to be arranged in the receiving chamber with as little obstruction as possible and to follow the movement of the tank valve in the aforementioned manner.

[0036] Preferably, a check valve is arranged in at least one of the two flow channels. This allows a safety element to be provided in the filter cartridge to prevent unwanted backflow from a downstream line section for the respective flow channel, in particular against unwanted backflow from the other flow channel.

[0037] Particularly preferably, a check valve is also arranged in the second of the two flow channels. This ensures reliable protection for both flow channels against backflow of liquid from a downstream area.

[0038] The water filter cartridge can also have a cartridge-side fixing element for interacting with a complementary, tank-side water filter cartridge fixing element, particularly in the form of a bayonet lock. This makes it possible to provide a secure connection between the water filter cartridge and the water tank. This also has a position-stabilizing effect and thus positively influences the effectiveness of the sealing elements formed and / or arranged on the water filter cartridge and the water tank.

[0039] An ion exchange material can be placed in the filter chamber. This can decalcify the water passing through it to such an extent that no, or at least only minimal, amounts of limescale crystallize during subsequent heating.

[0040] The water filter cartridge can also include a particulate filter and / or an activated carbon filter. The particulate filter protects against coarse contaminants, while the activated carbon filter ensures the safe drinking water passing through the water filter cartridges.

[0041] The complementary water filter cartridge connection element located on the tank side, which is designed in particular as a tank outlet valve, is designed as a double valve with concentrically arranged valve passages. This allows the water filter cartridge, with its two concentrically arranged water cartridge outlets, to be connected to a single connection element, which, as stated above, significantly improves the reliability of the connection seals.

[0042] The two valves of the double valve each form a spring-loaded valve. This allows them to seal the water tank when not externally loaded, thanks to the closing force exerted by the respective spring on the respective valve tappet. The tank can be filled with stored water. Only when at least one of these valve tappets is pressed does the corresponding valve open against the spring force acting on it, allowing any water stored in the water tank to flow out or, if connected to a beverage preparation machine, to be drawn from the water tank by the machine.

[0043] To ensure a reliable connection between the water tank and a beverage preparation machine, the water tank can preferably also be provided with a tank-side device connection with two concentrically arranged water outlets. This tank-side device connection is preferably designed to complement a tank connection element arranged on the device side and cooperates accordingly to supply water to the beverage preparation machine.

[0044] The invention also relates to a Water treatment machine with water tank and water filter cartridge. This is characterized by the fact that the water tank and the water filter cartridge are designed according to one of the previously described embodiments.

[0045] In particular, the beverage preparation machine comprises a tank connection arranged or arrangeable on the device side that is complementary to a tank-side device connection of a water tank with two concentrically arranged water outlets according to one of the embodiments described above.

[0046] When connecting the water tank to the beverage preparation machine, this tank connection opens the two valves of the double valve, allowing the machine to draw treated water from the water tank through the water filter cartridge via two different filter paths: one for preparing cold beverages and one for preparing hot beverages. Description of an example:

[0047] The invention is explained in more detail below with reference to the figures.

[0048] They show examples and diagrams: Figure 1: A partial view of a water tank with a water filter cartridge inserted therein, in a sectional view with two concentrically arranged water filter cartridge outlets and with a tank-side machine connection element and a spaced-apart, machine-side tank connection element. Figure 2: A view as in Figure 1 , but with the connecting elements joined together. Figure 3: A similar view as in Fig. 2 , but with a focus on the water filter cartridge with two hydraulically separated flow channels and the two concentrically arranged water filter cartridge outlets to provide two differently treated filtrate streams.

[0049] Accordingly, the Figure 1 a partial sectional view of a water tank 1 with a water filter cartridge 2 inserted therein.

[0050] The water filter cartridge 2 has two concentrically arranged water filter cartridge outlets, a first inner water filter cartridge outlet 2.1 and a second, outer water filter cartridge outlet 2.2. These are assigned to two hydraulically separated flow channels leading through the water filter cartridge 2: a first flow channel 3 and a second flow channel 4.

[0051] The water filter cartridge 2 is fed with water 6 stored in the water tank 1 via its inlet 5. The flow direction of the water 6 is symbolically represented by the arrows 6.1.

[0052] The water tank 1 comprises a tank-side machine connection element 7 extending away from its base 1.2 below the latter. This machine connection element 7 is sleeve-like and is provided for a sealing connection with a machine-side tank connection element 8 shown spaced apart from the tank 1. For a tight interaction between the water tank and the beverage preparation machine, the tank connection element 8 has a complementarily shaped recess / receptacle 8.3 for receiving the machine connection element 7. To increase the sealing effect of this connection, a sealing element 8.3.1, e.g., an O-ring, can be provided between the machine connection element 7 and the recess / receptacle 8.3. This sealing element 8.3.1 is preferably arranged on the recess / receptacle 8.3.

[0053] The machine connection element 7 further comprises two water tank outlet valves 7.1, 7.2 arranged concentrically with each other. The concentrically inner water tank outlet valve 7.1 is designed to open and close the first flow channel 3 through the water filter cartridge 2. The concentrically outer water tank outlet valve 7.2 is designed to open and close the second flow channel 4, which is formed separately from the first, through the water filter cartridge 2.

[0054] The first water tank outlet valve 7.1 is arranged in a component of the machine connection element 7, which itself acts as the valve tappet of the second water tank outlet valve 7.2. It comprises a valve seat, which is preferably formed as part of the second water tank outlet valve 7.2. The valve tappet of this first water tank outlet valve 7.1 is concentrically received in an opening of the valve tappet of the second water tank outlet valve 7.2 and is sealingly preloaded, in particular by means of a return spring, against the valve seat. To increase the sealing effect, in this embodiment, a sealing element in the form of an O-ring is arranged between the valve seat and the valve tappet.

[0055] This first water tank outlet valve 7.1 is designed to move with the valve stem of the second water tank outlet valve 7.2 when sealed. This means that if the valve stem of the second, outer water tank outlet valve 7.2 is raised by actuation, i.e., pressed against the interior of the water tank, e.g., by placing the tank-side machine connection element 7 onto the complementary activation element 8.2 of the device-side tank connection element, this generally has no effect on the closed state of the first, inner water tank outlet valve 7.1. Starting from a rest position, this remains closed.

[0056] In order to ensure a permanently reliable seal between the connecting piece of the first water filter cartridge outlet 2.1, here in the form of the tubular section 2.1.1, when the water filter cartridge 2 is inserted in the water tank 1, even in the event of such an at least axial change in position of the first water tank outlet valve 7.1 assigned to it, the adjoining filter chamber 3.1 is also arranged at least axially in the receiving chamber of the water filter cartridge 2.

[0057] This has the effect that, regardless of the closed state of the second, outer water tank outlet valve 7.2, the first, inner water tank outlet valve 7.1 remains closed during normal operation until it is activated by a complementary activation element 8.1 on the device-side tank connection element 8. And, during normal operation, this is only possible when the water tank is attached to the machine-side tank connection element.

[0058] The reliable sealing effect between the first water tank outlet valve 7.1 and the tubular section 2.1.1 is thus ensured even in the event that the second water tank outlet valve 7.2 should become stuck on the machine-side tank connection element 8 when the water tank 1 is removed. This is because a possible tensile effect on the connection between the first water tank outlet valve 7.1 and the tubular section 2.1.1 is prevented by the fact that the filter chamber 3.1 adjoining the latter is arranged in the water filter cartridge 2 so that it is axially movable and, in normal operation, raised.

[0059] Should the second water tank outlet valve 7.2 be stuck when the water tank 1 is removed and therefore does not release immediately, the axial play of the filter chamber 3.1 ensures sufficient relative freedom of movement of the section 2.1.1 firmly connected to it relative to the filter cartridge 2, so that it can follow the relative movement of the second water tank outlet valve 7.2 relative to the water filter cartridge 1 until the valve tappet of the second water tank outlet valve 7.2 is forcibly released from the recess / receptacle 8.3 of the machine-side tank connection element 8. This occurs due to the mechanical seating of the sealing area of the valve tappet on the valve seat, which limits the range of movement of the first valve tappet. As soon as the valve tappet rests against the valve tappet, it must be forcibly disengaged from the recess / receptacle 8.3 of the machine-side tank connection element.

[0060] Thus, no water can escape from the water tank 1 via the first filter channel 3 until the water tank outlet valve 7.1 is properly raised by the activation element 8.1.

[0061] For example, a descaling agent, e.g., an ion exchanger, can be arranged in the filter chamber 3.1 to treat the water 6 being treated by the filter cartridge 2, as far as possible, against precipitation during its heating for the preparation of hot beverages. Preferably, a further filter section is already arranged upstream of the filter chamber 3.1 in the filter cartridge 2, e.g., an activated carbon filter for disinfection and / or flavor improvement, in particular also for treating the water 6 flowing past the filter chamber 3.1 via the flow channel 4.

[0062] The valve stem of the second water tank outlet valve 7.2 is, again in the state of the water tank 1 removed from the machine-side tank connection element 8, also pressed sealingly against the valve seat of the second water tank outlet valve 7.2 by means of a return spring, preferably also using an intermediate sealing element, in particular an O-ring. The second water tank outlet valve 7.2 closes or opens the flow channel 4 of the water filter cartridge 2 when inserted into the water tank, as shown in the Figure 1 The flow channel 4 runs between the outer wall of the filter chamber 3.1, which is arranged at least axially in the filter cartridge 2, and the inner wall of the receiving chamber 4.1, which movably accommodates this filter chamber 3.1 (see also Fig. 3 ).

[0063] In order to ensure that the tank-side machine connection element 7 (see Fig. 2) To also improve the sealing effect towards the outside, a sealing element 8.3.1, preferably again in the form of an O-ring, can also be arranged between the machine connection element 7 and the complementary recess / receptacle in the machine-side tank connection element 8. To increase the sealing effect towards the inside, a sealing element 8.1.1 can be arranged, preferably again in the form of an O-ring.

[0064] For the sake of completeness, a beverage processing machine 10 is schematically shown connected to the two lines 9.1 and 9.2 leading from the machine-side tank connection element 8 for the forwarding of the two hydraulically separated filtrate flows from the flow channels 3 and 4. The filtrate flow from the flow channel 3 is passed centrally through the machine-side tank connection element 8 into line 9.1. The filtrate flow from the flow channel 4 is passed on to line 9.2 via the chamber 8.3.2 formed by the recess / receptacle 8.3.

[0065] On the inside of the water tank 1, the water filter cartridge 2 is connected to a tank-side water filter cartridge connection element 1.1 by a cartridge-side tank connection element 2.4. These are preferably two complementary, sleeve-like components that are designed to fit one inside the other. To increase the sealing effect, a sealing element 2.4.1, e.g., an O-ring, can be arranged between them.

[0066] For fixing to the water tank 1, the water filter cartridge 2 can have a cartridge-side fixing element 2.4.2 for interaction with a complementary, tank-side water filter cartridge fixing element 1.1.1, in particular in the form of a bayonet lock.

[0067] The Figure 2 shows, also in detail and in section, the water tank 1 with the water filter cartridge 2 inserted therein, but in contrast to Figure 1the tank-side machine connection element 7 is connected to / plugged into the machine-side tank connection element 8.

[0068] The valve tappet of the first water tank outlet valve 7.1 sits on the activation element 8.1 and the valve tappet of the second water tank outlet valve 7.2 sits on the activation element 8.2, so that the two water tank outlet valves of the water tank 1 are open.

[0069] The tubular section 2.1.1 of the first water cartridge outlet 2.1 is made of a softer material than the complementary water filter cartridge connection element 1.1 located on the tank side. It is sealingly connected to the latter in a plug-in-type manner. In the present example, the tubular section 2.1.1 is inserted into a recess in the valve tappet of the second, radially outer of the two concentrically arranged water tank outlet valves 7.1 and 7.2. Alternatively, the tubular section 2.1.1 could also be designed such that it can be sealingly plugged onto the valve tappet of the second water tank outlet valve 7.2.

[0070] The Figure 3 shows, again in detail and in section, the water tank 1 with the water filter cartridge 2 inserted therein as in Figure 2 , whereby the focus here is on the filter cartridge 2, which is shown over the entire height extension of its housing 2.3.

[0071] A first filter and / or retention element 2.5, e.g., a tile or sieve, is arranged in the area of the inlet 5 of the filter cartridge 2. Behind it, inside the housing 2.3, is a filter chamber 2.6, in which, for example, an activated carbon filter can be arranged.

[0072] The water 6 flowing from the water tank 1 into the water filter cartridge 2 flows through this filter chamber 2.6 in the direction of arrow 6.2. On the inside of the housing 2.3 of the water filter cartridge 2 opposite the inlet 5, there is arranged a further filter and / or retaining element 2.7, e.g., also in the form of a tile or sieve. This element can also have elastic properties, e.g., to support additional components to be accommodated in the housing during assembly of the water filter cartridge, in particular at least under slight prestress. This further increases the sealing effect between the individual components of the water filter cartridge 2, preventing unwanted migration of granular particles.

[0073] In the direction of water flow 6, a filter chamber 2.8 adjoins the filter and / or retention element 2.7 inside the water filter cartridge 2. This filter chamber can be equipped, for example, with a particle filter and sealed downstream with another filter and / or retention element 2.9 to prevent the escape of filter material, but still be permeable to the water 6 to be treated. This filter chamber 2.8 can be designed as an insert component, optionally comprising the two filter and / or retention elements 2.7 and 2.9.

[0074] Following the filter and / or retention element 2.9 in the direction of water flow 6, according to the direction of arrows 6.3, is the receiving chamber 4.1. It is bounded by the wall 4.1.1 and separated from the filter chamber 2.6 in a watertight manner.

[0075] The filter chamber 3.1 is housed within the receiving chamber 4.1, allowing at least axial movement, but preferably also radial movement. This filter chamber 3.1 is sealed watertight from the receiving chamber 4.1 by its wall 3.1.1 and its front-end cover and base elements 3.1.2 and 3.1.3.

[0076] An inlet opening 3.1.2.1 into the filter chamber 3.1 is formed on the cover element 3.1.2. An opening 3.1.3.1 is also formed on the base element 3.1.3. This is the outlet opening for the water further treated in the filter chamber 3.1. An additional filter and / or retention element is arranged at both the inlet and outlet openings to prevent filter material from escaping from the filter chamber 3.1 while still allowing water to flow through.

[0077] The first water filter cartridge outlet 2.1, described above, is formed around the outlet 3.1.3.1 at the bottom 3.1.3 of the filter chamber 3.1 and is firmly connected to it, in the form of the tubular section 2.1.1. This section is made of a softer material than the valve tappet of the second 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 firmly connected to it can follow a movement imposed on the valve tappet of the second tank outlet valve 7.2 when the water tank is removed from the machine-side tank connection element 8, possibly by clamping the valve tappet in the recess / receiver 8.3, in particular axially, but preferably also radially.

[0078] The water 6 drawn from the water tank to be treated by the water filter cartridge 2 flows into the inlet area of the receiving chamber 4.1 in the direction of the bearings 6.1 to 6.3 as a single water stream treated jointly by the filter sections 2.5 to 2.9. In the inlet area of the receiving chamber 4.1, this water stream is divided into two hydraulically separate flow paths 3 and 4.

[0079] The first flow path 3 leads through the filter chamber 3.1 and the descaling agent arranged therein, such as an ion exchanger. This decalcifies the water to be drawn from the water tank 1 by the beverage preparation machine 10 for preparing a hot beverage (see Fig. 1 ).

[0080] The second flow path 4 carries the water 6, which has already been treated by the filter sections 2.5 to 2.9, through the receiving chamber 4.1 past the filter chamber 3.1 to the second water filter cartridge outlet 2.2. The water 6 conducted via this flow path 4 is intended for the preparation of a cold beverage by means of the beverage preparation machine 10.

[0081] In order to position the filter chamber 3.1 at a distance from the wall 4.1.1 in the receiving chamber, ribs and / or knobs or similar spacer elements 4.1.2 are arranged on the wall 4.1.1 and / or on the wall 3.1.1 of the filter chamber 3.1. Figure 3 Examples of these are shown in the inlet area of the recording chamber.

[0082] To avoid a back-suction effect from the other of the two flow channels 3 and 4, a check valve can be arranged in at least one of the two flow channels, but preferably in both. List of reference symbols:

[0083] 1 Water tank 1.1 Tank-side water filter cartridge connection element 1.1.1 Tank-side fixing element 1.2 Base 2 Water filter cartridge 2.1 First water filter cartridge outlet 2.1.1 Tubular section 2.1.1.1 Sealing surface 2.2 Second water filter cartridge outlet 2.3 Housing 2.4 Cartridge-side tank connection element 2.4.1 Sealing element 2.4.2 Cartridge-side fixing element 2.5 Filter and / or retention element 2.6 Filter chamber / activated carbon 2.7 Filter and / or retention element 2.8 Filter chamber 2.9 Filter and / or retention element 3 First flow path 3.1 Filter chamber 3.1.2 Cover 3.1.3 Base 3.1.3.1 Outlet 4 Second flow path 4.1 Receiving chamber 4.1.1 Wall 4.1.2 Ribs / nubs / spacer elements 5 Inlet 6 Water 6.1 Arrow 6.2 Arrow 6.3 Arrow 7 Tank-side machine connection element 7.1 First water tank outlet valve 7.2 Second water tank outlet valve 8 Machine-side tank connection element 8.1 Activation element 8.1.1 Sealing element 8.2 Activation element 8.3 Recess / receptacle 8.3.1 Sealing element 8.3.2 Chamber 9.1 Line 9.2 Line 10 Beverage processing machine / device.

Claims

1. Water tank (1) with water filter cartridge (2), characterized in that the water filter cartridge (2) comprises two water filter cartridge outlets (2.1; 2.2) which are arranged concentrically to one another for two hydraulically separated flow channels (3; 4) for providing two differently processed filtrate flows.

2. Water tank with water filter cartridge according to Claim 1, characterized in that a first (2.1) of the two water filter cartridge outlets (2.1; 2.2) which are arranged concentrically to one another is arranged so as to be at least axially, preferably also radially, movable in the housing (2.3) of the water filter cartridge (2).

3. Water tank with water filter cartridge according to Claim 1 or 2, characterized in that the first movably arranged water filter cartridge outlet (2.1) is configured in the manner of a plug-in element with a tubular portion (2.1.1) for water-tight interaction with a complementary water filter cartridge connecting element (1.1), in particular a tank outlet valve (7.2), arranged on the tank side.

4. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the tubular portion (2.1.1) is manufactured from a more flexible material than the complementary water filter cartridge connecting element (1.1), in particular than the tank outlet valve (7.2), arranged on the tank side.

5. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the tubular portion (2.1.1) forms a sealing surface (2.1.1.1) which acts radially relative to the complementary water filter cartridge connecting element (1.1) arranged on the tank side.

6. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the first (2.1) of the two water filter cartridge outlets (2.1; 2.2) which are arranged concentrically to one another is assigned to a first flow channel (3) formed by the water filter cartridge (2) and the second water filter cartridge outlet (2.2) is assigned to a second flow channel (4) which is configured at least in some portions separately from the first flow channel (3) through the water filter cartridge (2).

7. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the first flow channel (3) comprises a filter chamber (3.1) which is arranged so as to be at least axially, preferably also radially, movable in the housing (2.3) of the (2) water filter cartridge.

8. Water tank with water filter cartridge according to one of the preceding claims, characterized in that spacing ribs and / or spacing studs or the like are formed on the movably arranged filter chamber (3.1) and / or in a complementary receiving chamber (4.1) for the filter chamber (3.1) in the water filter cartridge (2), for spacing apart the two chambers (3.1; 4.1) from one another.

9. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the complementary receiving chamber (4.1) for the filter chamber (3.1) is configured as a flow chamber without filter material and as part of the second flow channel (4).

10. Water tank with water filter cartridge according to one of the preceding claims, characterized in that a non-return valve is arranged in at least one of the two flow channels (3; 4).

11. Water tank with water filter cartridge according to one of the preceding claims, characterized in that a non-return valve is also arranged in the second of the two flow channels (3; 4).

12. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the water filter cartridge (2) has a cartridge-side fixing element (2.4.2) for interaction with a complementary tank-side water filter cartridge fixing element (1.1.1), in particular in the form of a bayonet closure.

13. Water tank with water filter cartridge according to one of the preceding claims, characterized in that an ion exchanger material is arranged in the filter chamber (3.1).

14. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the water filter cartridge (2) comprises a particle filter and / or an activated carbon filter.

15. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the complementary water filter cartridge connecting element (1.1) which is arranged on the tank side and which is configured, in particular, as the tank outlet valve, comprises a double valve with concentrically arranged valves (7.1; 7.2).

16. Water tank with water filter cartridge according to one of the preceding claims, characterized in that the two valves (7.1; 7.2) of the double valve in each case form a spring-loaded valve (7.1; 7.2).

17. Water tank with water filter cartridge according to one of the preceding claims, characterized in that a tank-side appliance connection (7), with two water outlets which are arranged concentrically to one another, is configured on the water tank (1).

18. Water processing machine (10) with water tank (1) with water filter cartridge (2), characterized in that the water tank (1) and water filter cartridge (2) are configured according to one of the preceding claims.