EP3366850B1 - Household appliance for dispensing liquid with a hot water system as disinfection device for a cooled water system and household appliance with cooled water system with a disinfection device - Google Patents

Description

The invention relates to a household appliance for dispensing liquid according to the preamble of independent claim 1 or the preamble of independent claim 14. The household appliance has an output unit for dispensing the liquid. The household appliance also has a connection device for connecting the household appliance to an external water network. The household appliance also has a chilled water system with which a water supplied from the external water network can be cooled. In addition, the household appliance has a disinfection device which is designed to disinfect at least partial areas of at least the cooled water system.

Such a configuration is, for example, from DE 196 18 319 C2 known. There a disinfector is arranged as a separate unit in an area itself, in which the water supplied is to be cooled with a cooling device. The disinfector there has a heating device and a flow adjustment device. When disinfecting, water flows from the external domestic water network through the heater, which heats this water.

The functionality of the water dispenser there is relatively limited and disinfecting is very complex, since water from the external domestic water network first has to be heated and additional separate physical components are required in the device for disinfecting, which otherwise have no further functionality.

A treatment system for liquid which is used in a household is known from the prior art. In this context, sanitary fittings are known as dispensing units for the liquid in a further specification. So is from the DE 10 2013 002 857 A1 such a sanitary fitting for tapping water is known. In a further embodiment, it is also known there that, in addition to the sanitary fitting, a boiler is also associated with this household appliance. With this, hot water can be made available, which is significantly warmer than in terms of temperature usually via a hot water pipe which is connected to the external water network and which can be output via this sanitary fitting or the water tap. The device there has a water outlet line to which a negative pressure can be applied when a valve element is closed. By means of this negative pressure, the water located in the water outlet line is at least partially sucked into a water reservoir counter to the outflow direction. Due to the curved geometry there, in particular a gooseneck geometry, of the sanitary fitting, an interruption is generated there during this back suction process via a line breaker at the maximum of this gooseneck bend, so that that part of the residual water in the water outlet line that is up to an outlet opening in this sanitary fitting is over this discharge opening is explicitly drained and that part which is upstream of this line breaker is sucked back into the water reservoir, namely the boiler. Thus, via a single line, namely the water outlet line, both the targeted supply of hot water to the dispensing opening of the sanitary fitting and the discharge of the remaining water after a dispensing process are carried out via this single water outlet line. The return of this water that is no longer required and no longer dispensed from the line into the boiler has disadvantages in that, on the one hand, this already cooled water has to be warmed up again or the water in the boiler cools down. On the other hand, such a return requires a complex process, which in particular requires this specific line breaker at a specific position. Another major disadvantage, however, is the fact that a certain proportion of this remaining water also runs out through the dispensing opening of the sanitary fitting, so that the situation can arise here for a user that relatively hot water can run over his hands. On the other hand, this dripping or leakage in a small trickle can give a user the impression of a no longer fully functional sanitary fitting, since after the end of a dispensing process such leakage occurs, which also creates a leaky and qualitatively disadvantageous impression.

In addition, from the DE 10 2008 006 255 A1 a device for dispensing water is known. There, too, the device has a fitting body as the output unit, which represents a sanitary fitting and thus a water tap. At In the version there, the fitting body is connected to an external water network. This connection device has a cold water pipe and a hot water pipe. A mixing valve is arranged between an output opening of the fitting body and these two feed lines in order to enable the water from the cold water feed line and the hot water feed line to be mixed, if necessary.

Separately from this, in one exemplary embodiment the device has a hot water system which has a boiler. The boiler is connected to the fitting body and in particular to the output unit there via a separate line unit in which a valve is also arranged. The line unit is completely separated and led separately to this dispensing opening and is therefore not connected to the line which leads from the mixing valve to the dispensing opening of the fitting body. The functionality of this device with regard to the generation of differently mixed and / or differently tempered liquids that can be dispensed is limited as a result.

From the US 2016/023880 A1 a beverage dispenser is known. The device has a beverage unit which can be connected to an external beverage system. The device also has a tank with hot water and a tank with cool water. The two tanks are each connected to an output of the device by a separate line

From the pamphlets U.S. 6,143,258 and EP 2 672 027 a water dispenser and a sanitary fitting are known, with which you can tap cold water in addition to tap water.

The object of the present invention is to create a household appliance for dispensing liquid in which disinfection of a chilled water system can be carried out simply and with less effort. This object is achieved by household appliances according to the independent claims.

The invention relates to a household appliance for dispensing liquid. The household appliance can also be referred to as a liquid treatment system for the household. The household appliance has a dispensing unit for dispensing the liquid. Furthermore, the household appliance has a connection device for connecting the household appliance to a water network external to the device. The household appliance has a chilled water system, with which one of the water supplied to the external water network can be cooled. In addition, the household appliance has a disinfection device which is designed to disinfect at least partial areas of at least the cooled water system. The household appliance has a hot water system which is separate from the cooled water system and with which a water supplied from the external water network can be heated. This heated water and thus hot water from the hot water system can also be made available for output at the output unit.

The hot water system is used as a disinfection device in a disinfection mode of the household appliance that differs from an output mode in which the hot water can be output via the output unit. In this disinfection mode, the heated water is a disinfection medium for disinfecting at least partial areas of the cooled water system and / or for disinfecting a line device of the household appliance that is separate from the cooled water system. In this embodiment of the household appliance, a hot water system that is present in addition to and separately from the cooled water system is thus multifunctional. In addition to treating the supplied water as hot water, which is then provided for dispensing a liquid via the dispensing unit, it can also be used as a disinfection device in a specific mode, namely the disinfection mode. This hot water, which is then provided anyway, then forms the disinfectant medium.

This design of the household appliance significantly increases the multifunctionality. On the one hand, a wide variety of liquids can be generated for the output at the output unit, which can thus be generated and output at different temperatures and / or can be mixed differently with regard to the liquids contained. In addition to this improvement in functionality, reliable and safe disinfection with one of the systems, namely the hot water system, is also made possible.

The mixing of the liquids to generate a mixed liquid can take place in the device itself, for example before dispensing via the dispensing unit or directly when dispensing via the dispensing opening of an dispensing unit, so that the liquids are mixed immediately after leaving the dispensing opening.

It is provided that the household appliance has the line device with which the water of the external water network, in particular without being routed via the cooled water system or the hot water system, can be routed from the connection device to the output unit. At this
Embodiment, the water of the device-external water network is thus fed directly from the connection device to the output unit with the line device. With such a configuration, it is thus also possible in the household appliance to output the water supplied from the external water network directly via the output unit, independently of the hot water system and independently of the cooled water system. This also increases the flexibility of the liquid generation to be dispensed by the household appliance.

It can be provided that the line device has a cold water line and a hot water line, which are connected to the connection device. This also makes it possible that only the water supplied from the device-external water network is individually processed and supplied to the output unit via the line device. A corresponding mixing of the hot water in the hot water line and the cold water in the cold water line can thus also take place here in the line device.

It is provided that the hot water system and the cooled water system are coupled to a mixed line of the output unit that is separate from the line device. This further improves the individuality of the liquid mixed media to be generated and a corresponding separation is carried out. At least two separate lines, on the one hand the mixed line and on the other hand the line device, therefore open at the output opening of the output unit.

According to the invention it is provided that the hot water system is connected to the line device by means of a disinfection coupling line. In particular, the disinfection coupling line branches off from a line unit, which goes from a hot water treatment unit, in particular a boiler, to an outlet at which the hot water system flows into the mixed line.

Through this disinfection coupling line, heated water or hot water from the hot water system as a disinfection medium can only be conducted in the disinfection mode to the line device for disinfecting at least partial areas of the line device. According to the invention, the hot water system is with a Disinfection coupling line connected to the chilled water system, with hot water from the hot water system as a disinfection medium to the chilled water system for disinfecting at least partial areas of the chilled water system being routable through the disinfection coupling line only in disinfection mode. The disinfection of at least partial areas of the household appliance, in particular the cooled water system, can thereby be carried out very advantageously and also efficiently. No additional heating units or the like need to be built in, since components of this type that are already present for generating a different functionality of the household appliance are used in any case. Such a configuration achieves a configuration with very few components, especially for the disinfection functionality, since only this additional disinfection coupling line is required.

The line device preferably has at least one filter which, in the disinfection mode, represents a partial area through which the disinfection medium flows. With this configuration, the filter is disinfected in a very simple and advantageous manner, which is arranged in particular in the cold water line of the line device.

The line device is preferably designed with a cold water line and a separate hot water line, the hot water system and the cooled water system being connected to the cold water line inside the device.

In particular, it is provided that the cooled water system has a filter and / or has a storage container for cooled water, the filter and / or the storage container representing a partial area through which the disinfectant medium flows in the disinfection mode. This configuration also means that components of the cooled water system that are advantageous for the water treatment are disinfected individually and simply and yet highly efficiently.

It is preferably provided that the disinfection coupling lines, on the one hand a disinfection coupling line connected to the line device, and on the other hand a disinfection coupling line connected to the chilled water system, are formed by a common disinfection coupling line. As a result, a number of components is reduced in an advantageous manner and the supply of hot water as Disinfectant allows in two different system areas of the household appliance.

In such a configuration, this disinfection coupling line preferably opens into a line of the chilled water system branching off from the cold water line of the piping device, this branching pipe then being stored in particular in a storage container in which the water supplied by the piping device is cooled. Such a connection of the single disinfection coupling line can then also enable short paths to the corresponding components of the cooled water system as well as to corresponding components of the line device, which are each to be disinfected.

It is preferably provided that the disinfection coupling line is connected to the line device and / or the cooled water system via a valve. As a result, undesired introduction of hot water into the line device and / or the cooled water system in a different mode than the disinfection mode, in particular an output mode, can be prevented. In addition, the hot water can be added very carefully as a disinfectant to the individual sub-areas of the household appliance.

It is preferably provided that the valve is an electric valve. As a result, it can be controlled very precisely by a control unit and the hot water can be metered very precisely.

It is preferably provided that the disinfection coupling line branches off at a junction from a line unit of the hot water system designed as an outlet line, as has already been explained above. A valve is advantageously arranged in this line unit or the outlet line downstream of this branch. It can also be provided that this valve is arranged directly at this junction.

It is preferably provided that the household appliance has a drain line with which the disinfectant medium used can be diverted to the outside of the appliance after a disinfection mode has been carried out. The drain line does not open an output opening of the output unit, so that this discharge of the disinfectant medium does not take place via the output opening of the output unit. Rather, the drain line is laid in such a way that the disinfectant medium is drained into a residual reservoir, which is preferably connected to a waste water system external to the device, in particular a domestic waste water system.

This discharge line is preferably also designed to discharge after a discharge process in which a mixed liquid mixed by the hot water system and the cooled water system was discharged via the mixed line. This residual mixed liquid then still located in the dispensing unit after the dispensing process is thus not dispensed via the dispensing opening of the dispensing unit, but in this regard externally via the drain line, which is a separate line from this mixed line. In particular, the discharge line opens into an opening on the mixed line, at which the hot water system and the cooled water system also open into the mixed line.

The discharge line is preferably arranged and designed in such a way that this discharge of the disinfectant medium takes place purely as a result of gravity. This means that a separate pump or the like is not required in order to remove the disinfectant medium from the discharge line from the opening at which the discharge line opens into the mixing line. In particular, this also applies to the further functionality of the drain line if remaining mixed liquid is to be drained from the mixed line. However, an active delivery unit, such as a pump, can also be provided, for example.

The household appliance preferably has a control unit with which the start of the disinfection mode and / or the duration of the disinfection mode can be controlled.

The output unit is advantageously designed as a sanitary fitting and thus in particular as a water tap. As a result, a liquid treatment system can be created which is particularly multifunctional. This sanitary fitting, which in particular represents a common component in the household and via which conventional functionalities, in particular outputting from one water supplied to the external water network is now functionally significantly expanded.

In particular, the household appliance, in particular in the embodiment with the output unit as a sanitary fitting, is a household appliance that is separate from another household appliance, for example a household refrigerator or a fully automatic coffee machine. The household appliance explained above is therefore not part of a household refrigerator or a fully automatic coffee machine in these designs.

As a result, the household appliance explained can also be constructed in a relatively compact and space-saving manner and can be installed at locations in the household where appliances such as household refrigerators or fully automatic coffee machines cannot be installed. In particular, this embodiment of the household appliance can then also be arranged in the area of a kitchen unit with a sink or some other collecting basin.

In an advantageous embodiment it is provided that the cooled water system is connected to a carbonation unit of the household appliance and / or to a medium addition unit of the household appliance. The carbonation unit can supply carbon dioxide to the cooled liquid in the cooled water system, so that a carbonated liquid medium can also be generated and dispensed. The medium addition unit can be used to add individual flavor notes, in which case, for example, a liquid or a gel or a powder can be added as an additive as a medium. Other additives are also possible. In addition to the flavor additives already mentioned, the addition of minerals or sweeteners or the like can also be provided in the media addition unit.

In particular, the hot water system is designed in such a way that the water present therein can be heated to temperatures of over 90 °. The chilled water system is designed in such a way that the water contained therein can also be cooled to temperatures below 10 °.

The invention also relates to a household appliance for dispensing liquid. The household appliance can also be referred to as a liquid treatment system for the household. The household appliance has a dispensing unit for dispensing the liquid. The household appliance also has a connection device for connecting the household appliance to an external water network. The household appliance also has a chilled water system with which a water supplied from the external water network can be cooled. In addition, the household appliance has a disinfection device which is designed to disinfect at least partial areas of at least the cooled water system. The household appliance has a line device separate from the cooled water system, with which the water of the external water network can be passed directly from the connection device to the output unit without being passed through the cooled water system. The chilled water system has a storage tank for chilled water, in which a water heating unit is arranged. With the water heating unit, the water in the storage container can be heated to a germicidal temperature in a disinfection mode of the household appliance and can thus be disinfected. Such a configuration also makes it possible in the case of a household appliance which has only one cooled water system and such a line device to carry out an efficient and yet simple disinfection of partial areas of the household appliance.

It can be provided that the household appliance according to this further independent aspect of the invention also has a hot water system.

Embodiments of the invention are explained in more detail below with reference to a schematic drawing.

The single FIGURE shows a schematic representation of a household appliance 1 which is designed to dispense liquid. The household appliance 1 can also be referred to as a liquid treatment system for the household.

The household appliance 1 has an output unit 2, which is in particular a sanitary fitting. The output unit 2 is designed as a free-standing component in the household, which thus also represents a visible component and can be gripped and operated. The dispensing unit 2 has a dispensing opening 3 through which the liquid can be dispensed. The household appliance 1 has a connection device 4 which is designed for connection to a water network 5 external to the device. Between the connection device 4 and the output unit 2 there is a line device 6 with which the water of the external water network 5 can be passed directly to the output unit 2 without being passed through another water temperature control system of the household appliance 1 that is preferably present. In the exemplary embodiment, this line device 6 has a cold water line 7 and a separate hot water line 8. The two lines 7 and 8 open directly to the dispensing unit 2. It can thus be provided that only water is dispensed from the cold water line 7 via the dispensing opening 3 or only warm water is dispensed from the hot water line 8 via the dispensing unit 3. It is also provided that the line device 6 is designed in such a way that the warm water from the hot water line 8 and the cold water from the cold water line 7 are mixed and such mixed water from the line device 6 is output via the dispensing opening 3.

In addition, the household appliance 1 has at least one water temperature control system 9, which is designed as a separate system for the line device 6. The water temperature control system 9 is connected to a line 10. The line 10 is a mixed line and is thus arranged and connected in the household appliance 1 in such a way that a mixed liquid mixed from at least two liquids is passed therein. The line 10 is connected to the output unit 2. Liquid from the water temperature control system 9 can thus be dispensed via the separate line 10 to the dispensing unit 2 and there via the dispensing opening 3. The line 10 is a line separate from the line device 6, which is also separate from the cold water line 7 and the hot water line 8 in the dispensing unit 2 and thus in particular also opens separately into the dispensing opening 3. Via the line 10, a mixed liquid can also be output here separately and independently of the output of mixed water via the line device 6 to the output unit 2, which is mixed by liquid from the hot water system 11 and liquid from the cooled water system 12.

In the exemplary embodiment it is provided that the household appliance 1 has two water temperature control systems, namely a hot water system 11 and a separate cooled water system 12. The hot water system 11 and the cooled water system 12 are separate from one another and also represent separate systems for the line device 6 As can be seen, the hot water system 11 is connected to the cold water line 7 at an opening 13 which is downstream of the connection device 4. This makes it possible for cold water to be branched off from the cold water line 7 and fed to the hot water system 11. On the other hand, the hot water system 11 opens into the line 10 at the mouth 14. The hot water system 11 has a hot water preparation container, in particular a boiler 15. This boiler 15 is connected to a feed line 16 which opens at the mouth 13. In addition, the hot water system 11 has a line unit 17 which runs between the boiler 15 and the mouth 14. A valve 20 is arranged in the line unit 17.

A valve 18 is arranged in the supply line 16. A filter 19 is preferably arranged in the boiler 15.

In addition, it is provided that the chilled water system 12 is also connected to the cold water line 7, in particular also at the mouth 13. This allows cold water from the cold water line 7 to be fed to the chilled water system 12 and cooled there to a desired lower temperature. The cooled water system 12 here has a cooling circuit 21 with, in particular, a compressor 22, a condenser 23 and an evaporator 24. In addition, the cooled water system 12 has a storage tank or a container 25 which is thermally coupled to the cooling circuit 21 and in which the water supplied via a supply line 26 can be cooled by the cooling circuit 21. The container 25 is connected to the line 10 by a further line unit 27, in particular this line unit 27 opens out at the opening 14. A valve 28 is arranged in this line unit 27.

In addition, the line device 6 has a bypass line 29. This bypass line 29 branches off from an opening 30 from the cold water line 7 and opens again into the cold water line 7 at a further opening 39. A water filter 32, which is arranged in the main line of the cold water line 7, is bypassed by the bypass line 29. The mouth 39 is thus downstream of the water filter 32 in the cold water line 7.

A valve 31 is preferably arranged at the branch or mouth 30, which is arranged upstream of the water filter 32 in the cold water line 7.

In particular, the cooled water system 12 also opens at this mouth 39, so that cold water can be branched from the cold water line 7 into the feed line 26 of the cooled water system 12 at this mouth 39.

The household appliance 1 also has, in particular, a display unit 33 on which, for example, temperatures of hot water in hot water system 11 and / or temperatures of the chilled water in chilled water system 12 can be displayed. In addition, further information can also be displayed here. The display unit 33 can additionally also be designed as an input unit via which a user can make settings. In particular, a display and / or setting device is designed. In particular, then, for example Temperatures of a mixed liquid to be output, which is to be mixed from a hot water of the hot water system 11 and a cooled water from the cooled water system 12, can be entered and / or displayed. In addition, an input can then preferably also be made as to which additives, if any, are to be added to this mixed liquid and / or whether the mixed liquid should be carbonized.

The household appliance 1 has a control unit 34 by means of which the household appliance 1 can be controlled. In particular, output processes and / or mixing processes can be controlled accordingly here. For this purpose, the hot water system 11 and the cooled water system 12 can be controlled accordingly. The corresponding valves 18, 20 and in particular also 28 are preferably activated accordingly here. The valve 20 is arranged here in the line unit 17 between the boiler 15 and the mouth 14.

In addition, this control unit 34 can also control the further valve 31, so that bypassing the water filter 32 can also be controlled individually.

In addition, the cooling circuit 21 of the cooled water system 12 is then also controlled by the control unit 34. The control unit 34 can be a single control unit, but it can be designed as a higher-level control system made up of a plurality of control units.

In particular, the household appliance 1 also has a carbonation unit 35, which is connected in particular to the chilled water system 12, preferably the line unit 27. A valve 36 can be arranged in a corresponding connecting line. The cooled liquid that is to be dispensed from the cooled water system 12 of the mixed liquid that is to be dispensed via the mixing line 10, which represents the dispensing line, can then also be carbonized here.

In addition, the household appliance 1 can have a medium addition unit 37 which, in particular, is also preferably connected to the chilled water system 12. Here, too, a valve 38 can be arranged in the corresponding line.

The medium addition unit 37 is preferably connected to the line unit 27, which extends from the container 25 to the mouth 14.

The household appliance 1 can also advantageously have a sensor 40 with which the temperature of the mixed liquid in the mixing line 10 can be detected. Furthermore, in addition to or instead of this, it can be provided that the household appliance 1 has a sensor 41 which is arranged in the cooled water system 12, in particular is arranged in the line unit 27. This enables the temperature of the liquid that has already been cooled to be recorded. Furthermore, in addition to or instead of this, it can be provided that the hot water system also has a sensor 42. Here, too, the sensor can be designed to detect the temperature of the hot water.

The sensors 41 and 42 can additionally or instead also be designed to detect the flow rate of the respective line units 17 and 27.

The household appliance 1 also has a drain line 43 separate from the line 10. The discharge line 43 branches off from the line 10 at the mouth 14. The drain line 43 is arranged separately from the dispensing unit 2 and therefore does not end at the dispensing opening 3. Liquid medium drained via the drain line 43 is drained externally to the dispensing unit 2 and thus remotely from the dispensing opening 3.

In particular, a valve 44 is arranged in the discharge line 43 in order to carry out a defined opening and closing of the discharge line 43. This valve 44 can also be controlled via the control unit 34. The drain line 43 preferably opens into a residual reservoir 45, which is preferably connected to a house sewer network or represents the house sewage network.

As can also be seen in the figure, the cooled water system 12 has a filter 46, which is arranged in particular in the supply line 26 branching off from the cold water line 7. In this way, the water supplied to the cooled water system 12 by the cold water line 7 is filtered before it reaches the container 25 of the cooled water system 12.

Remaining mixed liquid which has remained in the line 10 and which is still located there after a discharge process of such a mixed liquid via the discharge opening 3 can be discharged via this discharge line 43. This remaining residual mixed liquid, which was mixed in particular from the hot water of the hot water system 11 and the chilled water of the chilled water system 12, is therefore not drained via the dispensing unit 2 and in particular not via the dispensing opening 3.

In addition, the household appliance 1 has a disinfection device, by means of which at least partial areas of the household appliance 1 can be disinfected in a specific disinfection mode of the household appliance 1. The disinfection mode is an operating mode of the household appliance 1 that differs from an output mode in which a liquid is to be dispensed via the dispensing unit 2. In one embodiment, the disinfection device is formed by the hot water system 11, which is thus multifunctional. For this purpose, it is provided that the household appliance 1 has at least one disinfection coupling line 47. This is connected in particular to the line unit 17 and, on the other hand, is connected to the line device 6 and / or the cooled water system 12. In the embodiment shown, only one disinfection coupling line 47 branches off at a junction 48 from the line unit 17. In particular, this branch 48 is upstream of the valve 20, which is arranged in the line unit 17. The disinfection coupling line 47 opens at an opening 49 into a specific line. Here in the exemplary embodiment it is provided that this opening 49 is on the supply line 26 of the cooled water system 12. In particular, the opening 49 is also upstream of the filter 46, which is preferably present. In particular, a valve 50 is arranged at this opening 49. In the disinfection mode, hot water from the hot water system 11 is passed through this disinfection coupling line 47 and thus reaches the cooled water system 12 and / or the line device 6. In particular, the filter 46 and the container 25 are rinsed with this hot water and disinfected accordingly. In addition to or instead of this, the hot water is then also passed to the filter 32 and the latter is accordingly flushed through with this hot water.

This hot water used as the disinfectant medium is preferably drained off after disinfection, preferably via the drain line 43. This disinfectant medium, too, is therefore not drained via the dispensing unit 2 and thus in particular not via the dispensing opening 3.

In addition to or instead of this, it can be provided that a water heating unit 51 is arranged in this treatment container or container 25 of the cooled water system 12. As a result, the cooled water in the container 25 can be heated directly in such a way that it is appropriately disinfected, since germs and the like can then also be killed here accordingly.

In a further embodiment it can be provided that the household appliance 1 is designed without the hot water system 11 and thus in particular then only has the cooled water system 12 and the line device 6. In such a configuration, the disinfection device is then only formed by the water heating unit 51.

The disinfection mode can be started individually for each user. It can also be programmed. It can also be triggered automatically via the control unit 34, in particular as a function of parameters detected by sensors. For example, such a disinfection mode can be carried out at times of the day when the household appliance 1 is not needed, for example at night. After a disinfection mode has been carried out, fresh water is preferably conveyed via the cold water line 7 and, precisely in the cooled water system 12, a corresponding cooling of this supplied fresh water is then carried out again.

It can be provided that the water heating unit 51 is electrically heated or is heated by a medium through which it flows, which can be gaseous or liquid.

The disinfection mode can additionally or instead also be carried out as a function of the last execution of an output process with regard to its start time and / or its duration. In addition to or instead of this, the further influencing parameters a point in time and / or the duration of the disinfection mode can be taken into account by a previously determined amount of water information.

List of reference symbols

1

Home appliance

2

Output unit

3

Dispensing opening

4th

Connection device

5

external water network

6th

Conduction device

8th

Cold water pipe

8th

Hot water pipe

9

Water temperature control system

10

Mixed pipe

11

Hot water system

12th

Chilled water system

13th

mouth

14th

mouth

15th

boiler

16

Supply line

17th

Management unit

18th

Valve

19th

filter

20th

Valve

21

Refrigeration cycle

22nd

compressor

23

Condenser

24

Evaporator

25th

container

26th

Supply line

27

Management unit

28

Valve

29

Bypass line

30th

mouth

31

Valve

32

Water filter

33

Display unit

34

Control unit

35

Carbonation unit

36

Valve

37

Medium addition unit

38

Valve

39

mouth

40

sensor

41

sensor

42

sensor

43

Drain line

44

Valve

45

Residual reservoir

46

filter

47

Disinfection coupling line

48

Junction

49

mouth

50

Valve

51

Water heating unit

Claims (14)

1. Household appliance (1) for dispensing liquid, with a dispensing unit (2) for dispensing the liquid, with a cooled water system (12), with which a water supplied by the water network (5) external to the appliance can be cooled, and with a disinfection device, which is embodied to disinfect at least subareas of at least the cooled water system (12), wherein the household appliance (1) has a hot water system (11) which is separate from the cooled water system (12), with which a water supplied by the water network (5) external to the appliance can be heated and can be provided for dispensing on the dispensing unit (2), wherein the hot water system (11) operates as the disinfection device in a disinfection mode of the household appliance (1), which differs from a dispensing mode, characterised in that the household appliance (1) has a connection apparatus (4) for connecting the household appliance (1) to a water network (5) external to the appliance, wherein the heated water is provided as a disinfection medium for disinfecting at least subareas of the cooled water system (12) and a line device (6) which is separate from the cooled water system (12), wherein the household appliance (1) has the line device (6), with which the water of the water network (5) external to the appliance can be guided directly from the connection apparatus (4) to the dispensing unit (2), wherein the hot water system (11) is connected to the line device (6) with at least one disinfection coupling line (47), by means of which water heated in the disinfection mode can be guided as a disinfection medium to the line device (6) in order to disinfect at least subareas of the line device (6).
2. Household appliance (1) according to claim 1, characterised in that the hot water system (11) and the cooled water system (12) are coupled to a mixing line (10) of the dispensing unit (2) which is separate in particular from the line device (6).
3. Household appliance (1) according to one of the preceding claims, characterised in that the line device (6) has a cold water line (7) and a warm water line (8) which is separate therefrom, wherein the hot water system (11) and the cooled water system (12) are connected to the cold water line (7) within the appliance.
4. Household appliance (1) according to one of the preceding claims, characterised in that the line device (6) has at least one filter (32), which, in the disinfection mode, is a subarea through which the disinfection medium flows.
5. Household appliance (1) according to one of the preceding claims, characterised in that the hot water system (11) is connected to the cooled water system (12) with a further disinfection coupling line (47), through which water heated in the disinfection mode can be guided as a disinfection medium to the cooled water system (12) in order to disinfect at least one subarea of the cooled water system (12).
6. Household appliance (1) according to claim 5, characterised in that the cooled water system (12) has a filter (46) and/or a container (25) for cooled water, which, in the disinfection mode, is a subarea through which the disinfection medium flows.
7. Household appliance (1) according to one of claims 5 or 6, characterised in that the disinfection coupling lines are formed by a shared disinfection coupling line (47).
8. Household appliance (1) according to one of the preceding claims 3 to 7, characterised in that the disinfection coupling line (47) is connected to the line device (6) and/or the cooled water system (12) by way of a valve (50).
9. Household appliance (1) according to claim 8, characterised in that the valve (50) is an electric valve.
10. Household appliance (1) according to one of the preceding claims, characterised in that the disinfection coupling line (47) at a junction (48) branches off from an outlet line (17) of the hot water system (11) which extends between a boiler (15) of the hot water system (11) and the dispensing unit (2).
11. Household appliance (1) according to claim 10, characterised in that a valve (20) in the outlet line (17) is arranged downstream of the junction (48).
12. Household appliance (1) according to one of the preceding claims, characterised in that the household appliance (1) has a discharge line (43), with which the used disinfection medium can be discharged externally to the device after implementing a disinfection mode.
13. Household appliance (1) according to one of the preceding claims, characterised in that the dispensing unit (2) is a sanitary fitting.
14. Household appliance (1) for dispensing liquid, with a dispensing unit (2) for dispensing the liquid, with a connection apparatus (4) for connecting the household appliance (1) to a water network (5) external to the appliance, and with a cooled water system (12), with which a water supplied by the water network (5) external to the device can be cooled, and with a disinfection device, which is embodied to disinfect at least subareas of at least the cooled water system (12), wherein the household appliance (1) has a line device (6), with which the water of the water network (5) external to the appliance can be guided directly from the connection apparatus (4) to the dispensing unit (2), characterised in that the cooled water system (12) has a container (25) for cooled water, in which a water heating unit (51) is arranged as a disinfection device, with which the water disposed in the container (25) during use can be heated to a germ-killing temperature in a disinfection mode of the household appliance (1).

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