Cleaning cartridge and system for cleaning a drinking water-carrying device and method for cleaning it

Abstract

System (1) for cleaning a drinking water-carrying device (20), comprising a filter cartridge (2) that can be inserted into a filter head (3), wherein the filter head (3) comprises an inlet and an outlet (5), wherein the system (1) comprises a cleaning cartridge (10) that is interchangeable with the filter cartridge (2) and which comprises an inlet and an outlet that are designed as a channel (106) extending coaxially to a central axis and as an annular channel (8) extending thereabouts, wherein the cleaning cartridge (10) comprises a cleaning agent that can be flushed into the drinking water-carrying device (20) via the filter head (3), wherein the cleaning cartridge (10) comprises an adapter (200) that can be inserted into the filter head (3) and which has a thread (201) for screwing into the filter head (3), wherein a cleaning agent insert (100) can be inserted into the adapter (200), and wherein the cleaning agent insert (100) is in the Adapter (200) is locked in place.

Description

Field of invention The invention relates to a system for cleaning a drinking water appliance, such as a water dispenser. The drinking water appliance can, in particular, comprise a container and / or pipes in which the water remains when the appliance is not in use. The invention further relates to a cleaning cartridge for such a system. The invention further relates to a method for cleaning a device that carries drinking water. Background of the invention DE 10 2010 005 893 A1 describes a plant for the production of ultrapure water with a purification unit designed to reduce the contamination load of the water flowing through the purification unit. This unit includes a filter cartridge with a purification medium such as activated carbon or ion exchange resin. Document US 6 004 458 A shows a water filter that includes an insert with a sanitizing medium. For the chemical cleaning of dispensing systems, the product "Bevi Tab" is known to be used. These alkaline or acidic tablets are placed in an adapter sight glass along with a sponge, and water is flowed through the glass to initiate cleaning. After a certain contact time, the system is rinsed. There are various drinking water dispensers that connect to an existing drinking water supply. In particular, there are water dispensers that can dispense chilled, carbonated water. This eliminates the need for bottled carbonated water. Often, these dispensers also offer the option of dispensing only chilled or only unchilled water. To treat tap water, filter cartridges are known to be installed upstream of such a drinking water appliance. A filter head for such a filter cartridge is provided on-site and installed inline in the existing water line leading to the drinking water appliance. A replaceable filter cartridge used for this purpose can, for example, include an ion exchange material to soften the water and activated carbon to remove pollutants and bacteria. One such system is sold, for example, under the trade name BWT Bestmax®. The filter candle is permeated by the water and treats it so that it can be used even better than drinking water, e.g. for a water dispenser or for a machine for preparing hot drinks. The product “Grohe Blue®” is known for disinfecting and cleaning a connection of a filter cartridge in a filter head of a drinking water line, with which a cleaning agent is provided in a cartridge that can be installed in place of the filter cartridge by means of an adapter in order to carry out a cleaning procedure. Currently, the cleaning of such drinking water-carrying devices is often not optimally resolved. These devices often include a container in which, for example, carbonated water is stored, as well as various pipes for supplying and distributing the water. Some devices allow the consumer to clean the container, for example by filling it with a cleaning fluid. However, this is cumbersome and requires handling the cleaning agent, which can even be dangerous, especially with strongly acidic or strongly alkaline cleaning agents. Furthermore, it is usually hardly possible to clean all the pipes of the drinking water-carrying appliance as well. Object of the invention In contrast, the invention is based on the objective of at least reducing the aforementioned disadvantages of the prior art. In particular, an object of the invention is to provide a system or cleaning cartridge and a method for cleaning a drinking water-carrying device, ensuring convenient and easy handling while simultaneously optimizing the cleaning of the device. Summary of the invention The object of the invention is already solved by a system for cleaning a drinking water-carrying device according to claim 1. Preferred embodiments and further developments of the invention can be found in the subject matter of the dependent claims, the description and the drawings. The invention relates to a method for cleaning a drinking water-carrying device. The drinking water-carrying device can be designed, in particular, as a water dispenser or as a beverage preparation machine, such as a vending machine for preparing hot beverages, such as coffee. The drinking water appliance is connected to an existing water pipe on the building. It is understood that this water pipe is under pressure, e.g., 1 to 10 bar. To supply the drinking water-carrying device with water, a filter cartridge containing a water treatment medium is inserted into the supply line. This involves a filter head, which is connected to a supply line and contains the filter cartridge. The filter head therefore has an inlet and an outlet, through which it is connected to the supply line. It is understood that, in accordance with the invention, the filter head can also be arranged in or on the drinking water-carrying device, or that it is located in a supply line at a distance from the drinking water-carrying device. The filter cartridge may, in particular, include an ion exchange material for softening the water and / or activated carbon for removing pollutants or bacteria. For connection to the supply line, the filter head includes an input and an output. The invention therefore provides a system in which the filter candle is inserted inline into a pressurized water line, where pressure is already present at the inlet. According to the invention, the system comprises a cleaning cartridge that can be exchanged for the filter candle and which includes a cleaning agent that can be flushed into the drinking water-carrying device via the filter head, wherein the cleaning cartridge comprises an adapter that can be inserted into the filter head, wherein a cleaning agent insert can be inserted into the adapter. According to the invention, the connection of the filter candle, through which the water flows into the filter candle and back from the filter candle to the filter head, is used to flush a cleaning agent into the water-carrying lines and / or containers downstream of the flow. This has the advantage that not just a single container, but all pipes and / or containers located downstream of the filter candle can be flushed with a cleaning fluid. Furthermore, the application is simple and convenient; in particular, the user does not need to manually handle a cleaning agent. Cleaning can be carried out, for example, when the filter cartridge needs to be replaced anyway. In this case, only one intermediate step is required: inserting the cleaning cartridge and flushing in the cleaning agent. It goes without saying that the cleaning cartridge has a connection that corresponds to the filter head. The cleaning cartridge also has an inlet and an outlet. The inlet and outlet are designed as a channel running coaxially to a central axis and as a ring channel extending around it. Both the filter candle and the cleaning cartridge are screwed onto the filter head, with the channels for introducing and discharging water being sealed in the connected state by seals which may be located on the filter head and / or on the filter candle or cleaning cartridge. According to the invention, the cleaning cartridge comprises an adapter that can be inserted into the filter head, wherein a cleaning agent insert can be inserted into the adapter. The system therefore includes a cleaning cartridge consisting of two basic components. The adapter includes at least some of the components for a sealing connection to the filter head (or "to the filter head"), such as a thread for screwing in. The adapter can be fitted with a replaceable cleaning agent insert containing the cleaning agent. This cleaning agent insert is designed to be replaceable, so that during the cleaning process only the cleaning insert needs to be replaced, not the entire cleaning cartridge. For example, the cleaning agent insert can be designed as a compact, disposable product and does not need to have a thread for screwing into the filter head. Preferably, the cleaning agent is in the form of a solid. In particular, the cleaning agent is in the form of at least one tablet. This makes storing and providing the cleaning agent easier. It only dissolves when used. Preferably, a cleaning agent, especially in tablet form, is used which only dissolves when water is passed through it. Such cleaning agents include, in particular, sodium carbonate as well as substances that form acids or bases in water and / or surfactants. If such a tablet is in standing water, especially in a chamber which is sealed with sieve inserts, the concentration around the tablet increases so much due to the beginning of dissolution that further dissolution almost comes to a standstill. Only when the tablet is rinsed with water does it dissolve during the cleaning process, so that a cleaning solution is formed from the water and the dissolving tablet. Compared to a liquid cleaning agent or rapidly dissolving solids, the use of such a tablet has the advantage that a cleaning solution with a relatively uniform concentration is produced, thus eliminating the need for mixing before introduction into the containers and / or pipes to be cleaned. The invention further relates to a cleaning cartridge designed for the aforementioned system. The cleaning cartridge therefore comprises, in particular, a connection head which includes an inlet and an outlet and which can be coupled to the filter head for a filter candle. The cleaning cartridge includes an adapter that can be inserted into a filter head, wherein a cleaning agent insert, in particular as described above, is inserted into the adapter. According to the invention, the cleaning agent insert is locked into the adapter. In a preferred embodiment of the invention, the cleaning agent insert is designed as a line coaxial to a central axis. The cleaning agent insert can be designed as a connection to the cleaning cartridge, in particular as an inlet that is sealed to the filter head when connected. In this embodiment, a ring channel can extend around the cleaning agent insert. This ring channel serves as a second connection, in particular as the outlet of the cleaning cartridge. The ring channel can be formed in particular by the use of cleaning agents and by an opposite wall of the adapter. The cleaning agent insert, designed in particular as a coaxial tube with a flow-through chamber, can thus be optimally flushed through. In one embodiment of the invention, the cleaning agent can be arranged in a chamber that can be opened without tools, in particular in a chamber of the cleaning agent insert. In this embodiment of the invention, it is particularly conceivable that for cleaning the system, only new cleaning agent is added, in particular at least one tablet comprising the cleaning agent is inserted or placed in. In particular, the cleaning cartridge, especially the cleaning agent insert, may include a removable sieve with which the chamber through which water flows is sealed. The sieve can be removed, at least one tablet inserted, and the chamber then closed again. According to another embodiment of the invention, the cleaning agent insert does not need to be opened by the user during intended use. This embodiment of the invention has the advantage that the user does not come into contact with the cleaning agent, in particular with the tablet. In one embodiment of the invention, the cleaning agent insert comprises at least two, preferably four, radially outward extending fins that engage in corresponding grooves of the adapter. The fins provide axial guidance in the insertion direction, enabling easy insertion of the cleaning agent insert. In a further development of the invention, at least one part of the fins, in particular two fins, comprises a locking pin which is locked into the adapter. When connected, the cleaning agent insert and adapter are permanently linked. At the same time, the cleaning agent insert can be easily removed again without tools thanks to the locking mechanism. The invention further relates to a method for cleaning a drinking water-carrying device, in particular a water dispenser. The procedure is carried out using a system and / or a cleaning cartridge as described above. According to the invention, a filter candle, which is inserted into a filter head that is connected inline to a water-carrying supply line, is replaced by a cleaning cartridge. Then, a cleaning agent is introduced into the drinking water-carrying device via the cleaning cartridge. The cleaning agent takes effect there, and after rinsing out the cleaning agent, the appliance that carries drinking water is clean. According to one embodiment of the invention, a container, in particular a carbonator and / or a line of the drinking water-carrying device, is emptied by introducing a gas before the cleaning agent is introduced and / or before the cleaning agent is discharged. This has the advantage that, particularly in a container, the incoming cleaning solution does not mix with the water supply already present in the container, or that, for a final rinsing process, the cleaning solution is at least removed from one container before drinking water is added to rinse the system again. The carbon dioxide that is already present, and which is otherwise used for carbonization, can be used as a gas. Preferably, the cleaning of the system is software-controlled, in particular automated. In particular, it may be provided that, before a cleaning process, it is checked whether there is still a sufficient supply of carbon dioxide in a corresponding gas cartridge. It is also conceivable, for example in the case of a water dispenser, to block water withdrawal by the user until the cleaning process is completed. Such a system, for example on the tap, can also generate a warning message, for example in the form of a colored LED, to signal to the user that the water coming out of the tap during the cleaning process must not be used as drinking water. A tablet is used as a cleaning agent, which dissolves when water flows past it. Brief description of the drawings The subject matter of the invention will be explained in more detail below with reference to an exemplary embodiment and the drawings Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 to Fig. 9. Fig. 1a and Fig. 1b show an exemplary embodiment of a system according to the invention for cleaning a drinking water appliance. Fig. 1a is a perspective view of the filter head with the filter cartridge inserted. Fig. 1b shows, in perspective views, the filter cartridge and the cleaning cartridge that can alternatively be inserted into the filter head. Fig. 2 is a side view of the cleaning cartridge and the cleaning agent insert, which can be inserted into the adapter of the cleaning cartridge. Fig. 3 is a top view of the cleaning agent insert. Fig. 4 is a sectional view along line AA according to Fig. 3. Fig. 5 is a perspective view of the cleaning cartridge. Fig. 6 is an axial sectional view of the cleaning cartridge.Figure 7 is a perspective detail view of the area of ​​a fin with a locking pin over which the cleaning agent insert is locked. Figure 8 is a schematic representation of how the system is used to clean a drinking water appliance. Figure 9 is a flowchart of the process steps for cleaning a drinking water appliance according to an embodiment of the invention. Detailed description of the drawings Fig. 1a and Fig. 1b show the components of a system 1 for cleaning a drinking water-carrying device. Fig. 1a shows a perspective view of a filter candle 2 which is inserted into a filter head 3. The filter head 3 includes an inlet (not visible in this view) and an outlet 5, with which the filter head is installed in a pressurized line (not shown). The water flows through the filter candle 2, which contains water treatment components, in particular an ion exchange material and activated carbon, and is directed via the outlet 5 towards the drinking water supply device. In this embodiment, the filter head 3 is attached to a wall bracket 4. Furthermore, the filter head 3 includes an adjusting element 6, which allows the flow ratio of softened and unsoftened or less softened water to be set. This allows the desired degree of softening to be adjusted and, in particular, the system to be adapted to the hardness of the locally available drinking water. As can be seen in Fig. 1b with reference to the removed filter candle 2, the head of the filter candle 2 includes a thread 7, via which the filter candle 2 can be connected to a corresponding thread of the filter head 3. Furthermore, the head of the filter candle 2 includes a water inlet and a water outlet, through which water is introduced into the filter candle 2, for example via a downpipe, and is then directed out again, for example via a ring channel surrounding the downpipe, in order to be supplied to the drinking water supply device via the outlet 5 of the filter head 3. According to the invention, a cleaning cartridge 10 can be connected to the filter head 3 instead of the filter candle 2. The design of the connection of the cleaning cartridge 10 corresponds to the connection of the filter candle 2. Thus, the cleaning cartridge, when inserted and removed, also causes the opening / closing of a valve integrated in the filter head 3, which ensures that when the filter candle 20 or the cleaning cartridge 10 is screwed in / unscrewed, the water flow is stopped and therefore no unintentional water leakage can occur. In this embodiment, the cleaning cartridge 10 consists of the adapter 200, in which a cleaning agent insert 100 is inserted. The cleaning agent insert 100 includes the cleaning agent in the form of at least one tablet. The cleaning agent insert 100 is inserted coaxially into the adapter 200. For this purpose, the cleaning adapter 100 includes several radially outward extending fins 101 that guide it during insertion. The reusable adapter 200 includes a thread 201 corresponding to the filter candle 2. Since the cleaning cartridge 10 only needs to contain cleaning agent for one cleaning process, significantly less volume is required, so that in this embodiment the cleaning cartridge 10 is shorter overall than the filter candle 2. Using a rotary handle 202 with a profile to make it easier to grip, the cleaning cartridge 10 can be screwed into the filter head 3 after the adapter 200 has been connected to the cleaning agent insert 100. Fig. 2 is a side view of the cleaning cartridge 10 with the cleaning agent insert 100 removed. The cleaning agent insert 100 and adapter 200 are designed coaxially to their central axis m. The central axis m is coaxial to the thread 201 and to a central axis of the connection 105, which serves as the inlet in this embodiment. The cleaning agent insert 100 is tubular in shape and is inserted axially into a receptacle 203 of the adapter 200. In this embodiment, the receptacle 203 extends beyond the thread 201 and has a smaller diameter than the thread 201. Fig. 3 shows the cleaning agent insert 100 in a top view. In the top view, the cleaning agent insert 100 is ring-shaped and comprises a coaxial channel (106, see Fig. 4) which is closed from above with a sieve disc 103. This allows water to flow through the cleaning agent insert 100. In this embodiment, the sieve disc 103 comprises several openings 104, each closed with a sieve. The sieve disc 103 can serve as a flow restrictor, which allows a defined volume flow to dissolve the cleaning agent gradually but completely while the system is rinsed with the cleaning agent. Alternatively, a defined volume flow can be implemented system-side or by means of a flow limiter integrated in the cleaning agent insert 100 and / or adapter 200. Furthermore, the cleaning agent application 100 comprises four radially extending fins 101 distributed around its circumference. Two opposing fins 101 each include a locking pin 102, which serves to lock the cleaning agent insert 100 in the adapter. Fig. 4 is a sectional view along line AA of Fig. 3. Starting from a conically shaped connection 105, which serves as the inlet of the cleaning cartridge, the cleaning agent insert 100 includes a channel 106, which leads to a chamber 107. The chamber 107 is closed at the top by the sieve disc 103 and at the bottom by the sieve disc 108, so that the cleaning tablet 109 does not fall out. This allows the chamber 107 to be filled with water, and the cleaning tablet 109 dissolves in the process. Optionally, the sieve disc 108 can be designed to be removable without tools. It is conceivable to refill chamber 107 with a tablet in order to reuse the cleaning agent insert 100. According to another embodiment of the invention, the sieve disc 108 is not removable by the user during intended use. This prevents the user from coming into contact with the cleaning agent. However, only the cleaning agent insert 100 needs to be replaced for a cleaning process; this can be designed as an inexpensive injection-molded plastic part and, in particular, does not need to include the complex thread for connecting to the filter head. The sectional view also shows that two opposing fins 101 in the upper area encompass a locking pin 102, which together with the fin 101 forms a T-shaped shape and serves to lock the cleaning agent insert 100. Fig. 5 is a perspective view of the cleaning cartridge, in particular of the connection of the cleaning cartridge 10. The coaxial channel 106 of connection 105 serves as an inlet (a reverse configuration is also conceivable). The further connection, in particular the outlet, is designed as a ring channel 8. The ring channel 8 is formed by the tubular design of the cleaning agent insert with the channel 106, which is opposite the wall of the connection 204. Fig. 6 is an axial sectional view of the cleaning cartridge 10 with the cleaning agent insert 100 inserted. The cleaning agent insert 100 is inserted into the receptacle 203, with the fins 101 serving as guides. When connected, water flows from the filter head through channel 106, then through chamber 107 containing the cleaning tablet, and exits chamber 107 through the lower sieve disc 108. The cleaning agent insert 100 sits at the bottom on at least one rib 205 (or two cross-shaped ribs), so that the water can flow out at the bottom. The direction of the water, now containing the cleaning agent, then reverses and the water flows via the ring channel 8, which surrounds the cleaning agent insert 100, to the connection 204 or outlet. It is understood that the water flows past the fins 101, which extend radially through the ring channel 8. Fig. 7 is a perspective detail view of a locking pin 102 which is connected to the fin 101. The locking pin is first guided over the corresponding guide 206 in the wall of the adapter, in order to then snap into place under an edge. However, the guide pin 102 and the edge are designed in such a way that the cleaning agent insert can also be removed without tools. Fig. 8 shows in a perspective view the overall system with which a drinking water-carrying device 20, designed in this embodiment as a water dispenser, can be cleaned. The system includes the filter head 3, in which either a filter candle 2 or the cleaning cartridge 10 described above can be inserted. In this embodiment, the filter head, together with the filter candle 2 or cleaning cartridge 10, is arranged outside the device 20. An arrangement inside the device 20 is also conceivable. The device, designed as a water dispenser, is connected to a tap 12 from which water, in this embodiment in three types of water, can be drawn. The tap, which can be connected to valve 11 designed as a switching valve, allows you to set which type of water can be drawn. The valve includes three inlets, 16a to 16c. Chilled, but not carbonated, water is available at entrance 16a. Chilled carbonated water is available at entrance 16b. Uncooled water is present at inlet 16c, which is taken directly behind filter candle 2 of the water-carrying pipe. The drinking water-carrying device 20 includes a cooling unit 15, through which cooled water can be directed to the inlet 16a. The device 20 optionally includes a pump 14, which forces water through the cooling coils of the cooling unit 15 into the carbonator vessel 9. Due to the CO2 present in the carbonator vessel 9, the pressure in the vessel can be higher than the applied line pressure. Furthermore, as the pressure in the carbonator vessel 9 increases, more CO2 dissolves. The cooled water is fed to the carbonator container 9, which in turn is connected to the CO2 container 17 to carbonate the water. Thus, cooled, carbonated water from the carbonator container 9 can be present at the inlet 16b of the valve 11. It is understood that the tap 12 is arranged on a drain 13, through which the discharged cleaning fluid can flow into the sewer system during a cleaning process. As shown in the flow diagram according to Fig. 9, to clean the entire system including the machine 20, the filter candle is first replaced with a cleaning cartridge. Then a cleaning program can be started on the device, especially on the water dispenser. First, the system checks whether there is still enough carbon dioxide in the CO2 container to complete the cleaning program. For this purpose, the device may include, for example, a calculating unit that determines the CO2 container's fill level after it has been replaced. If this is the case, the carbonator vessel, including the line leading to inlet 16b, will be flooded with carbon dioxide. Pump 14 is switched off. Subsequently, by simultaneously and / or sequentially opening valve 11 at all inlets 16a to 16c, the system is flooded with cleaning fluid until it reaches the outlet. Preferably, all lines downstream of filter head 3 are flooded with cleaning fluid, including, for example, the line leading to inlet 16c. The at least one tablet in the cleaning cartridge 20 dissolves slowly due to the flow of water, so that the entire system behind the filter head 3 is now flooded with cleaning fluid. The cleaning fluid is then allowed to take effect, for example for a period of 5 to 60 minutes. Then, for example after a corresponding indicator light from the system or an acoustic signal is emitted, the cleaning cartridge is replaced by a new filter cartridge 2. By opening valve 11 without introducing water into the carbonator vessel, the carbonator vessel and the line to inlet 16b are again emptied by introducing carbon dioxide. Subsequently, the filter candle is rinsed in and the carbonator container as well as all lines to the connections 16a to 16c are flooded with water by opening the valve 11 at all inlets 16a to 16c and switching on the pump 14. To completely flush the cleaning agent out of the system, the carbonator container 9, along with the line leading to inlet 16b, is then emptied again with carbon dioxide, and subsequently all lines are flooded again with filtered water. The cleaning process is now complete and the drinking water dispenser is ready for further use. For example, a signaling device such as an LED located on the tap can indicate that the device 20 is ready for operation again, and that the cleaning process is therefore complete. The invention made it possible to provide a simple, safe and convenient cleaning method for a drinking water-carrying device. Reference symbol list 1 System for cleaning a drinking water appliance 2 Filter cartridge 3 Filter head 4 Wall bracket 5 Outlet 6 Actuator 7 Thread 8 Ring channel 9 Carbonator container 10 Cleaning cartridge 11 Valve 12 Tap 13 Drain 14 Pump 15 Cooling 16a-16c Inlet 17 CO2 container 20 Drinking water appliance (water dispenser) 100 Cleaning agent insert 101 Fin 102 Locking pin 103 Strainer disc 104 Opening 105 Connection 106 Channel 107 Chamber 108 Strainer disc 109 Cleaning tablet 200 Adapter 201 Thread 202 Rotary handle 203 Receptacle for cleaning agent insert 204 Connection 205 Bridge 206 Guide

Claims

System (1) for cleaning a drinking water-carrying device (20), comprising a filter cartridge (2) that can be inserted into a filter head (3), the filter head (3) comprising an inlet and an outlet (5), the system (1) comprising a cleaning cartridge (10) that is interchangeable with the filter cartridge (2) and which comprises an inlet and an outlet designed as a channel (106) extending coaxially to a central axis and as an annular channel (8) extending thereabouts, the cleaning cartridge (10) comprising a cleaning agent that can be flushed into the drinking water-carrying device (20) via the filter head (3), the cleaning cartridge (10) comprising an adapter (200) that can be inserted into the filter head (3) and which has a thread (201) for screwing into the filter head (3), a cleaning agent insert (100) that can be inserted into the adapter (200), the cleaning agent insert (100) being in the Adapter (200) is locked in place. System (1) according to claim 1 , characterized in that the cleaning agent is designed as a solid, in particular as at least one tablet (109). Cleaning cartridge (10) designed for a system (1) according to one of the preceding claims. Cleaning cartridge (10) according to the preceding claim, characterized in that an annular channel (8) extends around the cleaning agent insert (100), in particular an annular channel (8) which is formed from the cleaning agent insert (100) and an opposite wall of the adapter (200). Cleaning cartridge (10) according to one of the preceding claims, characterized in that the cleaning agent is arranged in a chamber (107) through which water can flow, which is closed at least on one outlet side with a sieve. Cleaning cartridge (10) according to one of the preceding claims, characterized in that the cleaning cartridge (10) comprises a flow restrictor. Cleaning cartridge (10) according to one of the preceding claims, characterized in that the cleaning agent insert (100) has at least two, preferably at least four, radially outwardly extending fins (101) which engage in corresponding grooves of the adapter (200). Cleaning cartridge (10) according to the preceding claim, characterized in that at least a part of the fins (101) comprises a locking pin (102) which is locked in the adapter (200). Method for cleaning a drinking water-carrying device (20), in particular a water dispenser, wherein a filter candle (2) which is inserted into a filter head (3) which is connected to a supply line, is replaced against a cleaning cartridge (10) according to one of the preceding claims and a cleaning agent is introduced into the drinking water-carrying device (20) via the cleaning cartridge (10). Method according to the preceding claim, characterized in that a container, in particular a carbonator (9), and / or a line of the cleaning agent and / or is emptied before the cleaning agent is discharged by introducing a gas, in particular carbon dioxide. Method according to one of the preceding claims, wherein a tablet (109) is used as a cleaning agent which dissolves through flowing water.

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