WATER-BEARING HOUSEHOLD APPLIANCE AND METHOD FOR CONTROLLING A WATER-BEARING HOUSEHOLD APPLIANCE

Description

[0001] The present invention relates to a water-conducting household appliance and a method for controlling a water-conducting household appliance.

[0002] It is common practice to install an Aquastop system on water-using household appliances, such as washing machines or dishwashers. Common water-using household appliances often have a closed base pan with a local sump, which represents the lowest point of the base pan. A float switch is located in the sump. If the water-using household appliance is leaking internally and water runs into the base pan, the water lifts a float on the float switch and activates a switch, closing the connected Aquastop system at the inlet to the water-using household appliance. The water supply is then permanently interrupted as long as the float switch is raised. In current systems, the base pan is designed so that no water can escape from the housing of the water-using household appliance.

[0003] Causes of water in the base pan area can be a leak within water-carrying components in the water-carrying household appliance and / or a leaky internal water-carrying inlet hose.

[0004] US 2011 / 284094 A1 concerns a device base which can collect and pump away liquid from leaks in a household appliance, whereby the household appliance located above it can also be operated more ergonomically.

[0005] From JP H04 166124 A a dishwasher is known which, by means of a liquid seal, prevents water vapor from escaping from a lower area of ​​an access door of the machine.

[0006] From EP 3 653 776 A1 a washing machine is known which has a tub inside and defines a two-part welded washing drum inside the washing machine.

[0007] DE 10 2006 029 949 A1 describes a washing machine for protection against damage caused by leaking water in the area of ​​the front wall of a housing of a front-loading washing machine.

[0008] With the above design, currently known household appliances can only detect water leaks within the appliance. In contrast, the systems are not designed to detect water outside the water-carrying appliance and trigger appropriate responses.

[0009] Therefore, it is an object of the present invention to provide a water-conducting household appliance that can detect liquid outside the system boundary of the water-conducting household appliance and can initiate further actions based thereon.

[0010] The object is achieved by a water-conducting household appliance having the features of claim 1 and a method for controlling a water-conducting household appliance having the features of claim 7.

[0011] According to one aspect of the present invention, a water-conducting household appliance is provided, comprising a housing with a treatment chamber accommodated therein, a water supply which is designed to supply water to the treatment chamber, a shut-off device which is designed to prevent the water supply, at least one measuring device which is designed to detect a liquid outside the housing and to output a signal, and a control unit which is designed to control the shut-off device and / or to output a notification based on the signal from the measuring device.

[0012] Compared to the known prior art, the present invention provides the effect that an existing shut-off device is controlled not only based on liquid detected inside the water-conducting household appliance, but also based on liquid detected outside the water-conducting household appliance. The shut-off device can, for example, be an Aquastop system arranged at a water supply to the water-conducting household appliance. In other words, the shut-off device can be controlled based on information about the presence of liquid outside and inside the housing.

[0013] Liquid outside the housing of the water-using household appliance can occur, for example, if liquid leaks from an opening in the water-using household appliance and flows to the floor outside the housing. Furthermore, liquid can leak from the water supply, in particular between a connection of the water supply and the shut-off device. For example, a sealing element (O-ring, flat gasket, etc.) or an intermediate hose between a water connection (e.g. a faucet) and a shut-off device can be defective, allowing water to leak out unhindered. This liquid could be detected by the measuring device and cause the control unit to issue a notification so that a user can manually close the faucet. Alternatively, the control unit can also be designed to interrupt the entire water supply in such a case.In the context of home automation, it is also conceivable that the control unit can control a central water shut-off valve and thus interrupt the water supply.

[0014] The water-using household appliance can be a laundry treatment appliance, a dishwasher, or a water-using kitchen appliance. The housing can represent a system boundary between an interior of the water-using household appliance and a space outside the housing. The water-using household appliance can have an operating position in which it is usually operated. In the following, top and bottom always refer to an operating division of the water-using household appliance. A closed base pan can be provided within the housing. A local low point can be arranged in the base pan, in which a sensor device monitors whether or not liquid is present at the low point. This makes it possible to monitor whether liquid is accumulating in the base pan inside the water-using household appliance.

[0015] In a water-using household appliance, the treatment chamber can be, for example, a tub in a laundry appliance or the washing chamber for dishes in a dishwasher. Furthermore, the treatment chamber can be a boiler in a water-using kitchen appliance, in which the supplied water is heated.

[0016] The water supply can, for example, be a hose that leads from a faucet or wall connection to the water-using household appliance. Alternatively, the water supply can also be a rigid pipe. The water supply can consist of a flexible inner hose covered by an outer flexible hose. The outer hose can concentrically surround the inner hose. The outer hose can be waterproof, so that if the inner hose develops a leak, it can completely collect the water and, for example, direct it to the interior of the housing.

[0017] The shut-off device can be an Aquastop system, which has an electromagnetic valve that can close the water supply. The shut-off device can be arranged in the water supply. Preferably, the shut-off device is arranged directly on a wall connection (e.g., a faucet), and the water supply extends from the shut-off device to the housing of the water-conducting household appliance. This ensures that actuation of the shut-off device prevents any further flow of water to the water supply.

[0018] The inner water supply hose can be connected to other water-carrying components within the water-carrying household appliance, while the outer water supply hose can be connected to the interior of the housing, allowing water from the outer hose to flow directly into the housing. This ensures that, in the event of a leak in the inner hose, the water escaping from the leak can be fed through the outer hose to the base pan in the housing, allowing the sensor located there to detect the water and control the shut-off device accordingly to shut off the water supply.

[0019] The measuring device can, for example, comprise a float switch within the housing. The measuring device detects liquid outside the housing by supplying the liquid outside the housing to the liquid sensor within the housing. Additionally or alternatively, the measuring device can have a liquid sensor outside the housing, which can thus directly detect liquid outside the housing. The measuring device can therefore have at least one moisture sensor to determine that moisture is present outside the housing. According to another aspect of the present invention, the measuring device has at least two moisture sensors, one of which is arranged inside the housing and one outside the housing. Thus, it can be reliably determined whether liquid has leaked out due to a leak inside the housing or outside the housing.A notification or control signal can be issued accordingly.

[0020] The control unit can comprise a processor that can receive and process signals and issue control commands. For example, the control unit already provided in the household appliance can be used as the control unit.

[0021] The humidity sensor can communicate with the control unit via cable or wirelessly. For example, the measuring device can comprise a humidity sensor located outside the housing and connected to the control unit via wireless communication (e.g., Wi-Fi, near-field communication, Bluetooth, etc.). The measuring device can have a power source, such as a battery, that supplies the humidity sensor with power. Thus, any existing Aquastop system of a water-using household appliance, which can detect a leak inside the household appliance, can be expanded with additional functionality, since the measuring device can also detect the presence of liquid outside the housing.Regardless of where liquid is detected, the control unit can actively control the shut-off device and / or issue a notification once liquid has been detected. The notification can be issued to the user via Wi-Fi or smart home applications, for example. For example, a user can receive information on their smartphone that the measuring device has detected liquid. This information can also contain details about where this liquid was detected (i.e. either inside the housing or outside the housing). This allows the user to take appropriate countermeasures. At the same time or alternatively, the control unit can control the shut-off device so that no further water is supplied to the water-using household appliance.

[0022] Thus, the present invention provides a way to provide comprehensive protection against unwanted water leaks in water-using household appliances through the measuring device, in addition to a known Aquastop system. This is achieved not only by installing a sensor for monitoring inside the machine, but also by incorporating the surroundings of the water-using household appliance into the monitoring process. This can be achieved either by arranging an additional humidity sensor outside the housing and connecting it directly to the control unit of the water-using household appliance, or by ensuring that liquid that occurs outside the household appliance is fed to the humidity sensor provided in the household appliance.This ensures that the water-conducting household appliance can be operated even without the user's supervision, since in the event of damage the user is immediately informed and / or any damage that may occur is prevented or minimized by automatically controlling the shut-off device.

[0023] The measuring device preferably comprises at least one conductivity sensor. In the prior art, it is often the case that a liquid within the housing of the water-conducting household appliance is detected using a float sensor or the like. However, this requires a structural design that causes the water level to rise accordingly, moving a float switch of the float sensor accordingly so that the sensor responds. This is disadvantageous if such a structural design is not possible and / or the amount of water present is so small that the sensitivity of such a float sensor is insufficient to reliably detect the presence of a liquid.

[0024] With a conductivity sensor, on the other hand, even small amounts of liquid can be easily detected. The conductivity sensor can comprise two electrodes to which a specific voltage is applied. The conductivity sensor can be designed to continuously measure an electrical resistance between the two electrodes. If the two electrodes are neither directly nor indirectly connected, the electrical resistance is almost infinitely high. If, however, the two electrons are in electrical connection, the resistance drops rapidly. This occurs, for example, when both electrodes are in contact with the same body of water. The conductivity sensor can thus detect a change in conductivity and, based on this, determine that liquid is present at the electrodes of the conductivity sensor.

[0025] The two electrodes are preferably at least 4 cm apart. This ensures that no false alarm is triggered, as could happen if the two electrodes are too close together and, for example, damp dust fluff or the like connects the two electrons. In a further preferred embodiment, the two electrodes are at least 2 cm apart. This has the advantageous effect, particularly when used in laundry treatment appliances and / or dishwashers, that liquid can be detected at an early stage (i.e., even when relatively little liquid is present). According to a further aspect of the present invention, the two electrodes are approximately 1 cm apart.Thus, the conductivity sensor does not need to be placed in a specially designed location, which ensures that a certain liquid depth is quickly established even with a small amount of liquid, thus ensuring rapid sensor response. In contrast, the moisture sensor, with electrodes spaced approximately 1 cm apart, can be installed anywhere, as it can detect even a small water level.

[0026] Furthermore, the distance also provides sufficient protection against false triggering, as can happen, for example, when damp laundry is removed from the drum of a laundry treatment appliance and a few drops fall to the floor.

[0027] Preferably, the housing has at least one opening and the measuring device comprises at least one collecting channel arranged on the housing so that liquid emerging from the at least one opening can be collected by the at least one collecting channel.

[0028] The opening can, for example, be an opening in the water-conducting household appliance that creates a connection across the system boundary between an exterior of the housing and an interior of the housing. For example, the opening can be a laundry treatment agent drawer and / or an access to the treatment chamber in a laundry treatment appliance. Furthermore, the opening can be a dishwasher flap. The opening can be any opening in a water-conducting household appliance that crosses the system boundary between the interior and exterior of the housing.

[0029] The drip tray located beneath the opening allows the passive extension of the water-bearing household appliance to collect any liquid escaping from the opening, preventing it from running down the outside of the water-bearing household appliance to the floor and causing damage there.

[0030] By collecting the liquid escaping from the opening, it can be prevented from causing damage (for example, to furniture or property, etc.). The measuring device can detect liquid collected in the drip channel and, according to the above, control the shut-off device and / or issue a notification.

[0031] The collecting channel can, for example, extend across the entire width of the water-conducting household appliance at the base of the appliance.

[0032] This ensures that liquid running down the housing of the water-using household appliance can be reliably collected. In this case, a single collecting channel can be provided on the water-using household appliance. This way, the appearance of the water-using household appliance is not compromised by the collecting channel, increasing design freedom.

[0033] Preferably, the at least one collecting channel is designed, in particular inclined, such that the collected liquid can be guided to a collection point and the measuring device is preferably designed to detect a liquid at the collection point.

[0034] The collecting channel can have a U-shaped or V-shaped cross-section. This allows liquid to be reliably collected in the collecting channel. Furthermore, the collecting channel can be inclined so that the collected liquid can be reliably drained away. The collection point can be designed such that the cross-section of the collecting channel is widened there. This allows a certain amount of liquid to be collected at the collection point without it running out of the collecting channel and onto the floor or furniture. Consequently, during a time between a first liquid outlet and the shut-off by the shut-off device, the escaping liquid can be reliably collected and stored (i.e. in the collecting channel and / or in the collection point) in order to prevent any damage. The collecting ring preferably has a holding volume of more than 100 ml.Thus, a sufficient period of time can be bridged until the shut-off device is activated without any liquid leaking from the collecting channel. According to a further aspect of the present invention, the collecting channel has a capacity of more than 200 ml. In this case, even in the event of a large water leak, sufficient water can be retained by the collecting channel and / or the collection point.

[0035] At least two openings are provided on the housing and each opening is assigned a collecting channel, which has a collection point assigned to each collecting channel or a common collection point.

[0036] In other words, each opening in the housing of the water-using household appliance can have its own separate collecting channel. Each opening in the housing of the water-using household appliance can also have its own collection point. This way, in addition to detecting liquid at a collection point, it is also possible to determine from which opening the liquid leaked. This information can be output by the control unit, for example, as a notification to the user. Alternatively, various collecting channels can also have a single collection point to which liquid from all collecting channels can be fed. This allows the housing to be designed more compactly, as less space is required for collection points.

[0037] Preferably, the at least one collection point is arranged within the housing.

[0038] Thus, liquid collected by the at least one collecting channel can be transferred across the system boundary from outside the housing into the interior of the housing. For this purpose, the at least one collecting channel can extend, for example, through an opening in the housing into the interior of the housing. Inside the housing, the liquid can then be fed, for example, to a moisture sensor located there. In particular, the liquid collected outside the housing can be fed to the base pan and, in particular, to a local sump. Consequently, the water-conducting household appliance can use an existing moisture sensor by means of passive extension to detect the occurrence of liquid outside the housing. Furthermore, several collection points can also be arranged in the housing. For this purpose, each collecting channel runs into the respective collection point in the housing.As above, this offers the advantage of being able to determine from which opening the liquid has leaked, since each collecting channel can be assigned to a specific opening.

[0039] Preferably, the measuring device comprises a liquid sensor, in particular a conductivity sensor, and the liquid sensor is preferably arranged at the at least one collection point so that a liquid can be detected at at least one collection point.

[0040] Each collecting trough has its own liquid sensor so that the presence of liquid can be determined individually for each trough. For example, the trough can be pocket-shaped and a collection point can be located at the lowest point of the collecting trough. Electrodes of a conductivity sensor can be arranged on the sides of the collecting trough. The electrodes are preferably arranged above the level of the lowest point of the collecting trough so that the conductivity sensor is activated above a certain water level in the collecting trough or collection point. This prevents false triggering because the conductivity sensor only reacts when the water level in the collecting trough or collection point rises above a predetermined level. The electrodes of the conductivity sensor are preferably located in the lower third of the total height of the collection point or collecting trough.In this case, particularly advantageous operation is possible because the sensor reacts early enough before the collection point or the collecting trough overflows and false triggering can still be avoided.

[0041] Preferably, the measuring device comprises an underbody moisture sensor, in particular a conductivity sensor, wherein the underbody moisture sensor is preferably arranged below the housing in an operating state of the water-conducting household appliance.

[0042] The moisture sensor is preferably in contact with the ground beneath the water-conducting household appliance. In particular, the electrodes of a conductivity sensor are in contact with the ground. The electrodes are preferably at least 2 cm apart. This prevents false triggering. The electrodes can be pre-tensioned with a tensioning device so that they are reliably in contact with the ground. The electrodes can therefore reliably detect the presence of liquid beneath the housing. According to a further aspect of the present invention, conductive feet of the water-conducting household appliance are used as the electrons of the conductivity sensor. In this case, for example, a voltage is applied to the feet of a water-conducting household appliance so that the presence of moisture or liquid beneath the housing of the water-conducting household appliance can be reliably detected.Preferably, a voltage is applied to at least three feet of the water-conducting household appliance, so that even small, flat liquid leaks can be detected. The feet can be designed to include a conductive element that is in contact with the floor.

[0043] Preferably, the measuring device comprises a humidity sensor which is designed as a conductivity sensor with at least two electrons, wherein the electrons are preferably at least 3 cm apart, preferably at least 2 cm apart.

[0044] In these areas, sufficient sensitivity for detecting liquid can be achieved without increasing the number of false alarms.

[0045] According to a further aspect of the present invention, a method for controlling a water-conducting household appliance is provided, the method comprising the following steps: providing one of the above water-conducting household appliances, detecting liquid outside the housing and controlling the shut-off device so that a water supply to the water-conducting household appliance is prevented, and / or issuing a notification that liquid is present outside the housing.

[0046] All advantages and features mentioned in connection with the device also apply analogously to the method.

[0047] Individual aspects or features of embodiments may be combined with other aspects or features of other embodiments to form new embodiments.

[0048] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0049] In the drawings shows: Fig. 1: a water-conducting household appliance in accordance with the state of the art, Fig. 2: the water-conducting household appliance in accordance with the state of the art, Fig. 3: a water-conducting household appliance, Fig. 4: a water-conducting household appliance, Fig. 5: a further household appliance according to an embodiment of the present invention, Fig. 6: a further household appliance according to a further embodiment of the present invention.

[0050] Figure 1is a schematic and perspective representation of a laundry treatment appliance 100 as known in the art. The laundry treatment appliance 100 has a treatment chamber 40 for treating laundry. Furthermore, the laundry treatment appliance 100 has a housing 20 that defines an interior space. A measuring device 60 is provided in the interior space, which can detect any liquid that occurs inside the laundry treatment appliance 100. Furthermore, the laundry treatment appliance 100 is connected to a water source via a water supply 30. A shut-off device 50 is arranged in the water supply 30. If the measuring device 60 detects liquid, the shut-off device 50 is controlled such that it shuts off the water supply to the water-conducting household appliance.

[0051] Figure 2 is a schematic front view of the laundry treatment appliance from Figure 1. The laundry treatment appliance 100 further comprises a treatment agent drawer 90. Furthermore, the laundry treatment appliance 100 has an opening in the form of a porthole as access to the treatment chamber. Both the treatment agent drawer 90 and the porthole represent an opening in the system boundary of the housing 20. Furthermore, known laundry treatment appliances have access to the lint filter, the drain pump, or other devices of the laundry treatment appliance. All of these openings are closable and normally these openings represent a watertight barrier between the interior of the laundry treatment appliance 100 and the exterior of the laundry treatment appliance 100. However, should water (i.e., a liquid) nevertheless emerge from at least one of these openings due to incorrect operation, wear, and / or other causes, this liquid 8 runs downwards along the housing 20 on the outside of the laundry treatment appliance.Even if this liquid leakage occurs only drop by drop, a significant amount of liquid 8 can accumulate beneath the laundry treatment appliance 100. This liquid can cause damage to property and furnishings. The liquid present outside is not detected by the measuring device 60 arranged inside the laundry treatment appliance. Therefore, the operation of the laundry treatment appliance 100 continues unnoticed, and the damage can thus increase.

[0052] Figure 3is a schematic front view of a laundry treatment appliance 1. The laundry treatment appliance 1 is intended to remedy the above-described disadvantages of the prior art. The laundry treatment appliance 1 of the present invention has the above-described features of known laundry treatment appliances. In particular, the laundry treatment appliance 1 has a housing 2 that defines an interior space within it. A measuring device 6 is arranged in the interior space. The measuring device 6 is located in a closed base pan at its lowest point. The laundry treatment appliance 1 also has a treatment agent drawer 9 and a porthole 10. The treatment agent drawer and the porthole form a transition across the system boundary between the exterior and interior of the housing 2. The laundry treatment appliance 1 also has a control unit 7 that is designed to receive and process signals, and to output control signals.In addition, the laundry treatment appliance 1 has a shut-off device (not shown) that corresponds to the shut-off device 50 from the prior art and is arranged in a water supply line 30. In addition to the porthole and the laundry treatment agent drawer, the laundry treatment appliance 1 can have further openings that are not shown in the figures.

[0053] Compared to the prior art, the laundry treatment appliance 1 of the present embodiment has two collecting channels 11, each associated with an opening. Thus, a collecting channel 11 is associated with the treatment agent drawer 9, and a collecting channel 11 is also associated with the porthole 10. If liquid 8 escapes from the treatment agent drawer 9 and / or the porthole 10, this liquid is collected in the collecting channel 11 and directed to a collection point 12. In the present embodiment, the liquid 8 is directed from the collection point 12 into the interior of the housing 2, where it is fed to the base pan. As a result, the liquid level within the housing 2 rises, raising a float of the measuring device 6, which in the present embodiment is designed as a float switch.A signal is then transmitted to the control unit 7, which then controls the shut-off device such that the further water supply to the water-conducting household appliance 1 is interrupted. In all figures, the signal path from the measuring device to the control unit 7 is schematically illustrated by arrows. In a further embodiment not shown, the control unit 7 sends a notification (e.g., an alarm) to the user, preferably via the internet to a smart device. Preferably, the control unit sends a signal and shuts off the water supply.

[0054] Thus, in the present embodiment, even liquid that occurs outside the housing 2 can be detected and, based on the detection result, the shut-off device 5 can be automatically actuated and / or a signal can be output to prevent further water from being supplied to the laundry treatment appliance 1.

[0055] Figure 4is a schematic front view of a water-conducting household appliance 1. The water-conducting household appliance 1 of the present embodiment essentially corresponds to that of Figure 3 with the difference that only one collecting channel 11 is provided. The collecting channel 11 in the present embodiment extends across the entire width of the water-conducting household appliance 1 (i.e., across the entire width of the housing 2). The collecting channel 11 is arranged near the base below the deepest opening. This ensures that all liquid 8 escaping from one of the openings is collected by the collecting channel 11. If liquid 8 escapes, it is collected by the collecting channel 11 and fed to the collection point 12. From there, the liquid 8 flows back into the interior of the housing 2 so that the measuring device 6 provided in the housing 2 can detect the liquid 8.

[0056] Thus, an existing Aquastop system (blocking device) can be upgraded to a fully functional Aquastop system by adding a passive extension. Since in the event of accidental leakage from the detergent drawer or the porthole, the water adheres to the front of the machine and runs along it to the floor of the property, a collecting channel can be integrated into the base of the machine front, extending across the entire front of the machine. This can be implemented in a very tasteful design. Furthermore, local collecting channels (see Figure 3), one near the detergent drawer and one near the porthole (see description above). These can be integrated even more discreetly into the existing recess in the front of the appliance. What all drip trays have in common is that they can be designed with a slope, and at their lowest point, an opening leads into the interior of the machine, specifically to the floor, e.g., via downpipes. The collected water activates the existing internal Aquastop system.

[0057] In the present embodiment, smaller amounts of liquid (such as those that occur when laundry is removed from the washing drum) are not detected and therefore do not trigger a false alarm. Smaller amounts of water evaporate in the collecting channel and / or do not lead to effective drainage into the laundry treatment device 1. Only water leakage in harmful quantities is detected.

[0058] Figure 5is a schematic front view of a water-conducting household appliance 1 according to a further embodiment of the present invention. The water-conducting household appliance 1 of the present invention essentially corresponds to the previously described embodiments, with the difference that the measuring device has two conductivity sensors 6, one of which is arranged in each of the collecting channels 11. More precisely, one collecting channel 11 is arranged below the treatment agent drawer 9 and one collecting channel 11 is arranged below the porthole 10. Each collecting channel 11 has its own liquid sensor 6 assigned to it. The respective detection results of the liquid sensors 6 are fed to the control unit 7. The control unit 7 can thus identify where the liquid 8 has leaked out. The control unit 7 can pass this information on to a user.Furthermore, this information can also be stored internally so that it can be used later to specifically remedy the damage during damage tracking.

[0059] Figure 6 is a schematic view of another embodiment of the present invention. The laundry treatment appliance 1 of the present embodiment differs from that shown in Figure 5illustrated laundry treatment appliance 1, in that a further conductivity sensor 6 is arranged below the housing 2. In particular, the conductivity sensor 6 has two electrodes that are in contact with the surface on which the laundry treatment appliance 1 stands. The electrodes can be pressed against the floor by a biasing device to ensure reliable contact between the electrodes and the floor. This allows safety to be further increased by detecting even liquid that is not collected by one of the collecting channels 11 and thus detected by the measuring device 6 provided there, but that reaches the floor beneath the laundry treatment appliance 1 in another way.

[0060] In a further embodiment not shown, a wired conductivity sensor is mounted as part of the measuring device 6 near the laundry treatment appliance 1. This conductivity sensor (e.g., conductance sensor) can be connected to the control unit 7 by cable or wirelessly. This also allows liquid that escapes in front of the shut-off device and runs or falls to the floor in the vicinity of the laundry treatment appliance 1 to be detected. The described conductivity sensor can also be a battery-operated, self-sufficient liquid sensor that can be supplied together with the laundry treatment appliance. These can be connected or connectable to the laundry treatment appliance 1 via radio, so that the control unit 7 can actively control the shut-off device 5 based on a detection result of the external conductivity sensor. Reference symbol

[0061] 1Water-conducting household appliance 2Housing 5Shut-off device 6Measuring device 7Control unit 8Liquid 9Treatment agent drawer 10Porthole 11Collection channel 12Collection point

Claims

1. Water-guiding household appliance (1), comprising: a housing (2) with a treatment space (4) accommodated therein, a water supply (3), which is embodied to supply water to the treatment space (4), a shut-off facility (5), which is embodied to suppress the water supply, at least one measurement facility (6) with a liquid sensor, wherein the measurement facility is embodied to detect a liquid outside the housing (2), by it being possible for liquid outside the housing to be supplied to the liquid sensor inside the housing, and to output a signal, wherein at least two openings (9,10) are provided on the housing (2) and wherein each opening (9,10) is assigned a collecting channel (11), which have a collecting point (12) assigned to each collecting channel (11) or a common collecting point (12), and a control unit (7), which is embodied, based on the signal of each measurement facility (6), to control the shut-off facility (5) and / or to output a notification, wherein each collecting channel (11) has its each liquid sensor, so that it is possible for a presence of liquid to be determined individually for each collecting channel.

2. Water-guiding household appliance (1) according to claim 1, wherein the measurement facility (6) comprises at least one conductivity sensor.

3. Water-guiding household appliance (1) according to one of the preceding claims, wherein the at least one collecting point (12) is arranged inside the housing (2).

4. Water-guiding household appliance (1) according to claim 3, wherein the measurement facility (6) comprises a liquid sensor, in particular a conductivity sensor, and wherein the liquid sensor is arranged at the at least one collecting point (12), such that it is possible for a liquid (8) at the at least one collecting point (12) to be detected.

5. Water-guiding household appliance (1) according to one of the preceding claims, wherein the measurement facility (6) comprises a subfloor moisture sensor, in particular a conductivity sensor, wherein the subfloor moisture sensor is arranged below the housing (2) in an operating state of the water-guiding household appliance (1).

6. Water-guiding household appliance (1) according to one of the preceding claims, wherein the measurement facility comprises a moisture sensor, which is embodied as conductivity sensor with at least two electrodes, wherein the electrodes have at least a spacing of 3 cm, preferably of at least 2 cm, from one another.

7. Method for controlling a water-guiding household appliance (1), wherein the method comprises the following steps: - providing a water-guiding household appliance (1) according to one of the preceding claims, - detecting liquid (8) outside the housing, by liquid outside the housing being supplied to a liquid sensor inside the housing, and - controlling the shut-off facility (5) such that a water supply to the water-guiding household appliance (1) is suppressed, and / or - outputting a notification that liquid (8) is present outside the housing (2).