Toilet device having toilet body with porous inner surface

Abstract

The invention relates to a toilet device having a toilet body and a flush water supply device for supplying flush water to the toilet body, the flush water supply device being provided with a water connection for drinking water used as flush water. The toilet body has a bowl-shaped toilet body portion and a trap functionally preferably based on sealing water. The toilet body portion has a porous inner surface connected to a device for supplying a cleaning fluid to maintain and / or clean many of the inner surface. According to the invention, the device for supplying the cleaning liquid and / or the flushing water supply device is provided with at least one resorption safety device for preventing resorption of the cleaning liquid from the porous inner surface to the water connection. Thus, a toilet device is provided, the porous inner surface of the toilet body part connected to the device for supplying the cleaning fluid completely or at least largely prevents excrement or dirt from adhering to the inner surface of the toilet body, and sanitary flawless protection is provided on the drinking water side by means of the back-suction safety device.

Description

Technical Field

[0001] The present invention relates to a toilet device (WC device) having a toilet body and a flushing water supply device for supplying flushing water to the toilet body, wherein the flushing water supply device is provided with a water connection part for drinking water used as flushing water. Background Art

[0002] Toilet installations (toilet systems) are known in various designs. Conventional toilet bodies (toilet bowls) have an odor trap and a downstream drainage connection, which is connected to a waste pipe via a straight or curved connection. The inner surface of the toilet bowl with the associated odor trap is usually smooth and light-colored, usually made of white glazed ceramic.

[0003] The toilet bowl may be freestanding or wall-mounted. A pressure washer or tank is used to flush the toilet body. As toilet tanks, surface-mounted tanks and concealed tanks are known, wherein the surface-mounted tank is usually mounted on or above the toilet body as a top-mounted tank or as a suspended toilet tank.

[0004] Toilet brushes are commonly used to remove accumulated excrement or dirt in a toilet bowl. However, such brushes are not commonly used by users of toilet facilities or cannot be fully used by users to clean the toilet bowl, causing the toilet bowl to become dirty.

[0005] Solutions to this problem have been proposed. For example, CN111155608A proposes a toilet bowl having open micropores on the inner surface of the toilet bowl. The micropores (micropores) are used to prevent dirt from adhering to the inner surface. The toilet bowl outlined in CN111155608A has an inner shell and an outer shell that together define a water transfer layer. The water transfer layer has uniformly distributed micropores, which open at the inner shell in the form of concave micropores. Soapy water, hot water or a mixture of the two is guided onto the inner surface through these micropores so as to achieve water-saving cleaning of the toilet bowl. For this purpose, the water transfer layer is connected to a hot water pipe equipped with a switch valve.

[0006] CN207685953U also discloses a toilet cylinder having micropores on the inner surface of the toilet cylinder. The toilet cylinder has a sandwich-shaped cylinder wall having an intermediate layer as a water reservoir and an inner shell having micropores. Water is supplied to the intermediate layer as a water reservoir through an automatic constant pressure valve. The diameter of the micropores is selected so that a water film permanently exists on the surface of the inner shell by utilizing the water wetting tension combined with the function of the constant pressure valve. Therefore, excessive outflow of water from the porous inner shell should be avoided. The outlet of the toilet cylinder and the outlet of the toilet cylinder according to CN111155608A are each equipped with a vacuum suction valve.

[0007] However, these known toilet bowls with porous inner surfaces are not marketable, at least in Germany, because in the compact design of these toilet bowls there is still no hygienically flawless drinking water side connection that meets the requirements for hygienically flawless drinking water quality. Another disadvantage of the toilet bowls disclosed in CN111155608A and CN207685953U is that the pore water in the water transfer layer or intermediate layer serving as a water reservoir above the water level of the trap can generate unpleasant odors. A further disadvantage of these known toilet bowls is the presence of hygienically problematic and odor-polluting pore water below the water level of the trap. Summary of the invention

[0008] On this basis, the object of the present invention is to provide a toilet device of the type mentioned at the outset, in which adhesion of excrement or dirt residues to the inner surface of the toilet bowl is completely or at least largely prevented and which also provides hygienically flawless protection on the drinking water side. The object is to eliminate the above-mentioned disadvantages of the prior art as completely or as largely as possible.

[0009] This object is achieved by a toilet arrangement having the features specified in claim 1. Advantageous embodiments of the arrangement according to the invention are subject matter of the dependent claims referring to claim 1.

[0010] The toilet device according to the present invention comprises a toilet body and a flushing water supply device for supplying flushing water to the toilet body, wherein the flushing water supply device is provided with a water connection portion for drinking water used as flushing water. The toilet body has a bowl-shaped toilet body portion and a downstream water trap. The function of the water trap is preferably based on sealing water. The bowl-shaped toilet body portion has a porous (i.e., open-pore) inner surface, which is connected to a device for supplying a cleaning fluid to keep the porous inner surface clean and / or to clean the porous inner surface. According to the present invention, the device for supplying a cleaning fluid and / or the flushing water supply device are provided with at least one back-suction safety device, which prevents the cleaning fluid from being sucked back (backflowing) from the porous inner surface to the water connection portion.

[0011] Thus, a toilet device of the type mentioned at the outset is provided, wherein the porous inner surface of the bowl-shaped toilet body part connected to the device for supplying cleaning fluid completely or at least largely prevents excrement or dirt residues from adhering to the inner surface of the toilet body, and the bowl-shaped toilet body part provides hygienically flawless protection on the drinking water side by means of the back-sucking protection. In other words, the toilet device is formed with a self-cleaning toilet body, which does not require the use of a toilet brush for cleaning; in addition, the toilet device according to the invention also provides protection against backflow (back siphoning) according to DIN EN 1717.

[0012] According to the present invention, the porous inner surface of the bowl-shaped toilet body part can be realized using an open-porous material (e.g. sintered ceramic). Preferably, during the manufacture of the toilet body, one or more inserts made of an open-porous material (e.g. sintered ceramic) are integrated into the wall of the toilet body. The wall, for example, has an outer shell, the parts of which, except for one or more connection areas for supplying cleaning liquid to the open-porous material, are also designed to be liquid-tight. The open-porous material can be covered by an inner shell on the inner surface of the bowl-shaped toilet body, at least in some areas. The inner shell can also be designed to be liquid-tight in some areas. In addition, the inner shell can also be porous in the sense of being open or perforated in some areas, preferably micro-perforated.

[0013] It is also within the scope of the invention that a water-conducting wall area is formed in the wall of the toilet body or in the bowl-shaped toilet body part, for example in the form of a channel and / or a flat or gap-shaped cavity, which cavity is sealed liquid-tight with respect to the outside except for one or more connection areas for supplying cleaning fluid and which cavity is delimited on the inside by a porous inner surface.

[0014] In the context of the present invention, the term "cleaning fluid" is understood to mean in particular water that is at least partially tapped from a drinking water pipe or that has been tapped from a drinking water pipe. The water tapped from the drinking water pipe may first be collected in a water tank, preferably in a hidden water tank, and some of the water is then supplied to the porous inner surface of the bowl-shaped toilet body portion. The water tank or container connected to the pipe for supplying water used as a cleaning liquid may be equipped with a trough, a basket or a mesh holder for holding solid, soluble cleaning agents. Optionally, the water tank or container connected to the pipe for supplying water used as a cleaning liquid may also be equipped with another type of mechanism or dispensing device for adding cleaning agents (particularly liquid cleaning agents).

[0015] An advantageous embodiment of the invention is characterized in that the flushing water supply device has a water tank, preferably a concealed water tank, a drain valve and a filling valve for filling the water tank with drinking water from a water connection, the filling valve having an outlet nozzle which, in an operating position of the filling valve, defines a free flow path relative to a maximum water level present in the water tank, and in that a device for supplying a cleaning liquid is connected to the water tank, wherein the water present in the water tank is used as a cleaning liquid to keep the porous inner surfaces of the toilet body part clean and / or to clean the porous inner surfaces.

[0016] This embodiment of the invention makes use of proven flushing technology, whereby the free flow path defined by the outlet mouth of the filling valve represents a reliable back-sucking safety device, which prevents the cleaning fluid from being sucked back from the porous inner surface in the direction of the water connection. The filling valve is arranged in the water tank and is preferably designed as a float-operated filling valve. The water tank has a flushing water outlet, for example for connecting a flushing water pipe, wherein when the water tank is installed, the flushing water outlet is higher than the toilet body connected to the flushing water pipe. The drain valve of the flushing water supply device is preferably arranged in the water tank.

[0017] A further advantageous embodiment of the invention provides a device for supplying cleaning liquid, the device having a container as a water reservoir, the container having a drain valve or an overflow, and a valve for filling the container with drinking water from the water connection or a second water connection, wherein the valve for filling the container has an outlet mouth which, in the operating position of the valve, defines a free flow path relative to the water level present in the container.

[0018] This embodiment of the invention also provides reliable back-sucking protection, which prevents the cleaning fluid from being sucked back from the porous inner surface in the direction of the water connection. The container used as a water reservoir preferably has an inspection port. Regarding a further development of the aforementioned embodiment, in which the flushing water supply device has a water tank, a drain valve and a filling valve for filling the water tank with drinking water from the water connection, the container used as a water reservoir may also be referred to as a second water tank. The container used as a water reservoir can optionally be equipped with a trough, a basket or a mesh holder for holding solid, soluble detergents. Alternatively, the container connected to the pipeline for supplying water used as a cleaning fluid can also be equipped with another type of mechanism or dispensing device for adding detergents (particularly liquid detergents).

[0019] According to a further advantageous embodiment of the invention, the device for supplying the cleaning liquid, preferably the container, is provided with a heating device for heating the cleaning liquid. This means that, without neglecting the safety against backflow (back siphoning) according to DIN EN 1717, the hot water can also be used for flushing the perforated wall area of ​​the toilet body (including the porous inner surface of the bowl-shaped toilet body part). Conventional toilet tanks operating in parallel with the container are only used for flushing the toilet body in a substantially conventional manner.

[0020] In the alternative embodiment described, the heating device for heating the cleaning liquid can be designed as an instantaneous water heater for heating the cleaning liquid flowing through as needed, or as a heating coil for continuously or repeatedly heating the cleaning liquid held in a container.

[0021] A further or alternative advantageous embodiment of the invention is characterized in that the device for supplying cleaning liquid has an additional water connection for direct connection to a hot or cold water pipe, in particular a hot water network or a cold water network, an ejector defining a free flow path, and an electrically controllable valve, wherein the ejector is arranged in a liquid-tight flow-through housing, and wherein the electrically controllable valve is preferably arranged between the additional water connection and the ejector. An ejector designed and arranged accordingly also makes it possible to achieve a reliable back-sucking protection, which prevents a backflow (back-sucking) of the cleaning fluid from the porous inner surface in the direction of the water connection. The liquid-tight flow-through housing ensures a targeted discharge of the cleaning liquid, for example water, in the event of contamination, for example, at the ejector, so that the cleaning liquid flows through the ejector. For example, the electrically controllable valve can be a solenoid valve.

[0022] According to another advantageous embodiment of the present invention, the device for supplying cleaning fluid is provided with a pump for conveying cleaning fluid in the direction of the porous inner surface. The pump can be used to achieve continuous or intermittent flow through the porous inner surface of the toilet body. This is particularly effective for preventing accumulation on the inner surface of the toilet body. The pump is preferably designed and / or controllable in a manner that its delivery rate or delivery pressure can be variably adjusted. In addition, this embodiment includes a variant in which the pump can be controlled in a manner that it produces a time-varying (e.g., pulsating) liquid flow on the porous inner surface. In addition, the pump is preferably arranged in a modifiable manner in the water tank or the container. Optionally, the pump can also be arranged outside the water tank or the container, in an inspection port in a wall (particularly a prefabricated wall), or in the toilet body.

[0023] Another advantageous embodiment of the present invention provides a device for supplying a cleaning fluid, the device being provided with at least one sensor and a controller, wherein the controller triggers the supply of the cleaning fluid according to at least one sensor signal from one or more sensors. This makes it possible to supply the cleaning fluid as needed to keep the porous inner surface of the toilet main body part clean and / or to clean the porous inner surface. Since it is usually not necessary to continuously supply the cleaning fluid (e.g., water) to the porous inner surface of the toilet main body part, this embodiment of the present invention can avoid unnecessary high consumption of the cleaning fluid. To this end, at least one sensor is preferably designed so that it detects user identification or use identification associated with the toilet main body. A favorable variant of this embodiment of the present invention is characterized in that the sensor or at least one of the sensors is arranged in or on a mounting element supporting the toilet main body, or is arranged in or on the toilet main body. This variant helps to realize a compact toilet device according to the present invention, so that the toilet device can be easily installed. The sensor or at least one of the sensors is designed, for example, as a motion sensor, a weight sensor, a pressure sensor, or a sound sensor. Such a sensor can reliably realize user identification or use identification.

[0024] Here, a motion sensor is understood in particular to be a member which converts a change in position into an electrical variable which can then be evaluated using suitable measurement techniques. In the device according to the invention, such a motion sensor can be combined with an articulated toilet seat or toilet lid attached to the toilet body or with a movable, in particular pivotable, operating or lever element of an actuation plate or the like in order to trigger the toilet flushing.

[0025] In particular, the motion sensor can be an electromechanical component, such as a tilt switch. Alternatively, the motion sensor can also be an acceleration sensor. By integrating the measured values ​​of such an acceleration sensor, the motion can be calculated with high precision. Corresponding sensors can be obtained at low cost.

[0026] The motion sensor used in the toilet device according to the invention can, for example, have a mechanism for detecting the position of the sensor by means of suitable switching technology and, when the position of the sensor changes, emit a sensor signal corresponding to or representing (indicating) the movement. For example, a moving, in particular conductive, object can close contacts at the beginning or end of its range of motion, or trigger an electrical pulse, depending on its position relative to gravity.

[0027] Furthermore, the optional motion sensor of the toilet device according to the invention can also be a so-called motion detector. In particular, the motion sensor can be an infrared sensor, i.e. a photosensitive member that can detect infrared radiation. Such a sensor can detect not only motion but also heat emitted by a person.

[0028] In addition, the optional motion sensor of the toilet device according to the present invention can also be, for example, a light barrier or a distance sensor. The distance sensor can be designed as a laser sensor, a radar sensor or an ultrasonic sensor, and the distance sensor is used to measure the distance between the sensor and the measurement object or person. The change in distance is converted into an electrical signal by the sensor or by the sensor controller.

[0029] According to a further embodiment of the invention, a motion sensor designed as a motion detector or distance sensor can be arranged on an actuating device which is mounted or mountable on the device according to the invention for triggering toilet flushing.

[0030] If the sensor for user detection or use detection is a weight sensor or a pressure sensor, the sensor can be designed, for example, as a piezoresistive pressure sensor, a strain gauge, or according to the functional principle of a strain gauge. In particular, the weight sensor or pressure sensor for user detection or use detection can also be designed as a silicon pressure sensor, a capacitive pressure sensor, or a pressure sensor with a Hall element.

[0031] Yet another embodiment of the present invention provides such an example: the function of the trap of the toilet body is based on sealing water, wherein the porous inner surface of the bowl-shaped toilet body part is formed only above the water level defined by the maximum effective sealing water level occurring during normal use of the toilet body. The purpose of this design is to limit the porous inner surface of the bowl-shaped body part to one or more areas of the inner surface of the bowl-shaped body part that are particularly exposed to the adhesion of excrement. The corresponding limitation makes it possible to optimize the cost-effectiveness ratio in terms of the costs associated with realizing the porous inner surface.

[0032] Yet another embodiment of the present invention provides an example where the function of the trap is (also) based on sealing water, wherein the porous inner surface of the main body portion of the bowl-shaped toilet is formed above and below a water level defined by the maximum effective sealing water level occurring during normal use of the toilet body. Although this embodiment requires more effort and has greater costs in realizing the porous inner surface than the previous embodiment, this alternative embodiment is characterized in that the maintenance and / or cleaning of the toilet body is improved, because the formation of the porous inner surface also below the water level means that fecal material traces can also be completely or largely eliminated in the trap.

[0033] According to a further advantageous embodiment of the invention, the porous inner surface of the bowl-shaped toilet body part is hydraulically connected to a liquid-conducting wall part of the toilet body located above the sealing water level, and the toilet device according to the invention is designed so that after the device for supplying cleaning liquid is turned off, the liquid located in the liquid-conducting wall part is at least partially retained in the liquid-conducting wall part of the toilet body. This can largely prevent water contaminated with excrement and / or urine from penetrating into the liquid-conducting wall part. Therefore, this design can prevent or at least reduce unpleasant odors emanating from dirty water and / or urine that may be present in the liquid-conducting wall part.

[0034] Alternatively, another advantageous embodiment of the present invention provides such an example: the porous inner surface of the bowl-shaped toilet body part is hydraulically connected to the liquid-conducting wall part of the toilet body located above the sealing water level, and the toilet device according to the present invention is designed so that after the device for supplying cleaning liquid is turned off, the liquid in the liquid-conducting wall part is discharged from the liquid-conducting wall part to the trap or the drainage pipeline, preferably to the wastewater pipeline by automatically opening the valve. This can also prevent or at least reduce the occurrence of unpleasant odors emitted from dirty water and / or urine that may be present in the liquid-conducting wall part. Here, another embodiment of the present invention is characterized in that the porous inner surface of the bowl-shaped toilet body part hydraulically connects the liquid-conducting wall part of the toilet body located above and below the sealing water level, and the toilet device according to the present invention is prepared so that during normal flushing of the toilet body, after the device for supplying cleaning liquid is turned off, the liquid in the liquid-conducting wall part located below the sealing water level is flushed into the wastewater pipe connected to the trap like the sealing water in the trap.

[0035] The toilet body of the toilet device according to the present invention is preferably designed so that its flushing is based on the displacement principle. This design is advantageous from an energy point of view because it does not require any electricity, in particular, does not require driving energy for the suction system to flush the toilet body.

[0036] Alternatively, another advantageous embodiment of the present invention provides such an example: the liquid-conducting wall portion of the toilet body is connected to the suction device, so that the liquid located below and above the sealing water level in the liquid-conducting wall portion or only the liquid located below or above the sealing water level is sucked away by the suction device. Although this embodiment requires the generation or existence of driving energy to operate the suction device, this embodiment is characterized in that the liquid-conducting wall portion of the toilet body is temporarily emptied quickly and almost completely, which eliminates unpleasant odors that may occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the following, the invention is explained in more detail with reference to the accompanying drawings, in which several embodiments are shown.

[0038] Figure 1 A toilet device according to the invention having a toilet mounting element, a toilet body and a flushing water supply device for supplying flushing water to the toilet body is shown in a side view, wherein the toilet body is shown in a vertical section;

[0039] Figure 1a Shows Figure 1 A magnified view of detail X in ;

[0040] Figure 2 Shows Figure 1 A perspective vertical cross-sectional view of a toilet body;

[0041] Figure 3 Shows Figure 1 A front view of a toilet mounting element, wherein the toilet body is not shown;

[0042] Figure 4 Shows Figure 1 A side view of a toilet mounting element, wherein the toilet body is not shown;

[0043] Figure 5 showing a perspective view of a backflow preventer;

[0044] Figure 6 The upper part of the concealed water tank with the receptacle for cleaning agent mounted in the toilet mounting element is shown in vertical section; and

[0045] Figure 7Another example of a toilet body according to the present invention is shown in vertical cross-section. DETAILED DESCRIPTION

[0046] Figure 1 A toilet device according to the invention is shown, which has a toilet body (toilet bowl body) 2 and a flushing water supply device for supplying flushing water to the toilet body 2. The flushing water supply device comprises a concealed water tank 4 attached to a toilet mounting element 6. The toilet mounting element 6 has two vertical metal profile columns 6.1, 6.2 in a manner known per se, which are connected to each other by metal profile crossbars 6.3, 6.4, 6.5. The lower ends of the metal profile columns 6.1, 6.2 are provided with height-adjustable feet. The lower metal profile crossbar 6.3 carries a pipe elbow 7, to which the wastewater connection 2.1 of the toilet body 2 is connected via an insertion sleeve 8. A second metal profile crossbar 6.4, for example with a U-shaped profile, is arranged above the lower crossbar. The second crossbar 6.4 is provided with an inner mounting hole 9 and an outer mounting hole 10 for receiving a threaded rod 11 to fasten the toilet body 2 to the mounting element 6. Furthermore, the second crossbar comprises a central through hole 12 for the passage of a flushing water pipe 13, wherein the through hole is, for example, circular. A water tank 4 connected to the flushing water pipe 13 is arranged above the second crossbar 6.4. The water tank 4 comprises an inspection port 14, via which various components (in particular a filling valve and a drain valve) can be installed in the water tank 4 and, if necessary, these components can be disassembled and removed for maintenance or repair purposes. The water tank 4 is provided with a water connection 15 for connecting to a drinking water pipe. The drinking water supplied to the water tank 4 is used as flushing water to flush the toilet body 2. The water connection 15 is, for example, arranged in the upper region of the side wall of the water tank 4. The water connection 15 is, for example, designed as a threaded connection, to which a shutoff valve arranged in the water tank 4 is connected, which shutoff valve is in turn connected via a water pipe to a filling valve controlled according to the water level in the water tank 4. An inspection well 16 is mounted on the inspection port 14, which can be shortened according to the wall thickness of the plate 3 attached to the front of the mounting element 6 and the wall covering attached to the plate. Finally, the opening of the inspection shaft 16 is covered by a plate which has at least one control element for triggering a flushing process, for example for actuating a drain valve.

[0047] Such a mounting element 6 is also referred to as a mounting frame or prefabricated wall element.

[0048] The filling valve mounted in the water tank 4 has an outlet mouth which, in the operating position of the filling valve, defines a free flow path relative to the maximum water level in the water tank 4 .

[0049] The toilet body 2 comprises a bowl-shaped toilet body part 2.2 and a trap 2.3 located downstream thereof. The function of the trap 2.3 (siphon) integrated in the toilet body 2 is based on sealing water. The bowl-shaped body part 2.2 has a porous (pore) inner surface 2.4, which is connected to a device for supplying a cleaning fluid to keep the porous inner surface 2.4 clean and / or clean the porous inner surface 2.4. This forms a self-cleaning toilet body 2. Therefore, it is no longer necessary or almost unnecessary to clean the toilet body 2 with a toilet brush.

[0050] The cleaning fluid is drinking water tapped upstream or downstream of the water connection 15 of the water tank 4, as seen in the flow direction, or preferably the cleaning fluid is flushing water taken from the water tank 4. A cleaning agent can be added to the cleaning liquid or flushing water used for decontamination, for example a conventional, commercially available cleaning agent, which contains in particular citric acid and nonionic and / or anionic surfactants and optionally a descaling agent (such as maleic acid).

[0051] The porous inner surface 2.4 of the toilet body 2, through which the cleaning fluid can flow out continuously, time-controlled or use-controlled, can extend substantially or almost over the entire inner surface of the bowl-shaped toilet body part 2.2. Figure 1 and Figure 2 As shown, the porous inner surface 2.4 preferably extends over a partial area of ​​the inner surface of the bowl-shaped toilet body part 2.2, at least over a partial area particularly exposed to the excrement adhesion portion.

[0052] The porous inner surface 2.4 of the toilet body 2 is realized by one or more open-porous (pore) wall portions of the toilet body 2. Preferably, one or more inserts made of open-porous material (e.g. sintered ceramic) are integrated into the wall of the toilet body 2 during the manufacture of the toilet body 2 for this purpose.

[0053] For example, the porous insert can be produced by mixing one or more organic components into a ceramic substance for producing porcelain or pottery, which one or more organic components thermally decompose (burn off) during firing or sintering and produce a pore structure of interconnected pores. The fluid permeability of this open-porous structure (especially the fluid permeability of the porous inner surface 2.4 of the toilet body 2) depends on the size, number and type of the pores produced. The size and number of pores and the fluid permeability are affected by the proportion of organic components and their composition in the ceramic substance, the pressing pressure of the ceramic substance and the firing temperature.

[0054] The wall of the toilet body 2 has an outer layer or shell 2.5, which is designed to be liquid-tight except for one or more connection areas for supplying cleaning fluid to the open-porous material 2.6. The substantially or partially liquid-tight shell 2.5 can also be called a liquid-tight surface layer or a liquid-tight outer layer.

[0055] The perforated wall area 2.6 is at least partially covered by an inner layer 2.7 on the inner surface of the bowl-shaped toilet body part 2.2. The inner layer 2.7 (also referred to as inner shell) is at least partially porous in the sense of being perforated or perforated. The inner layer 2.7 may also be liquid-impermeable in some areas.

[0056] According to the invention, the flushing water supply device and / or the device for supplying cleaning liquid is provided with at least one suck-back safety device 17, which prevents the cleaning liquid from being sucked back from the porous inner surface 2.4 in the direction of the water connection 15. The suck-back safety device 17 is designed, for example, in the form of a so-called pipe interrupter or comprises a water pipe insert or an ejector 17.1 which defines a free flow path 18 or a free outlet. Such a water pipe insert or ejector 17.1 is preferably arranged in a manner that allows the cleaning liquid to flow in a controlled manner. Figure 5 The free flow section 18 is defined by two hose or line connections 17.3, 17.4, which are connected to each other via at least one spacer 17.5 and whose line center lines M1, M2 are aligned with each other.

[0057] exist Figures 1 to 4 In the illustrated embodiment, a pump 20 is arranged in the water tank 4, through which part of the water contained in the water tank 4 is sucked in and supplied as a cleaning fluid to the water guide wall area 2.6, in particular the porous inner surface 2.4 of the toilet body 2, via a water pipe (connecting pipe) 21 leading from the water tank. The pump 20 is preferably arranged above the water level of the maximum flushing water level in the water tank 4 and is provided with a suction pipe 22, the suction opening 23 of which is preferably open near the bottom of the water tank.

[0058] The back-sucking safety device 17 is integrated in the water pipe 21. The back-sucking safety device 17 is, for example, Figure 5 The ejector 17.1 shown is realized, the ejector 17.1 defines a free flow path 18 and is inserted into a flow housing 17.2. The flow housing 17.2 may be substantially cylindrical or cubic in shape. The flow housing 17.2 has at least one hose connector or connection thread for connecting a water pipe 21. The ejector 17.1 is also provided with at least one connection thread or hose connector 17.3. The ejector 17.1 inserted into the housing 17.2 may be connected to the housing 17.2 by a non-positive connection, for example a threaded connection or a bayonet connection.

[0059] In a preferred embodiment, which is not shown in detail, the back-sucking safety device 17 integrated in the water pipe 21 is arranged in the water tank 4. The back-sucking safety device 17 is located above the maximum flushing water level in the water tank 4, for example above the lower edge of the inspection opening 14.

[0060] Figure 1 , Figure 3 and Figure 4 An alternative embodiment is shown in which the back-sucking safety device 17 integrated in the water pipe 21 is arranged outside the water tank 4. The back-sucking safety device 17 is preferably located above the maximum flushing water level in the water tank 4, for example at the height of the inspection opening 14.

[0061] The pump 20 is provided with a controller 25 and at least one sensor 26, whereby the control unit activates the pump 20 for a predetermined or adjustable period of time in dependence on at least one sensor signal from one or more sensors. Figure 2 In FIG. 2 , a controller 25 and at least one sensor 26 are schematically represented together by a block.

[0062] In particular, at least one sensor 26 can be integrated in the mounting element (prefabricated wall element) 6. For example, the sensor 26 can be an infrared sensor that detects the movement of a person and / or the heat emitted. Such a sensor 26 is preferably integrated in an actuator plate (not shown) installed in front of the inspection port 14. Alternatively, the sensor 26 can be a motion sensor that detects a hinged toilet lid (not shown). Such a sensor 26 is preferably arranged on or in the hinge of the hinged toilet lid or on the toilet body. In addition, the sensor 26 can be a pressure sensor or a weight sensor that detects the pressure load applied to the toilet seat or toilet body 2 due to a person sitting on the toilet seat or toilet body 2. Such a sensor 26 is preferably integrated in the toilet seat or on the toilet body 2 or in the attachment portion where the toilet body 2 is attached to the mounting element 6.

[0063] The use of the toilet body 2 by the user is indirectly detected by at least one sensor 26, so that the start of the pump 20 can be triggered as needed through the control unit 25 and the sensor system assigned to the pump 20, and thus the supply of cleaning fluid can be triggered to keep the porous inner surface 2.4 of the toilet body 2 clean or to clean the porous inner surface 2.4.

[0064] like Figure 1 and Figure 2 As shown, in the illustrated embodiment, the porous inner surface 2.4 of the toilet body does not extend over the entire inner surface of the bowl-shaped toilet body portion 2.2. On the contrary, the area 2.8 of the inner surface of the toilet body 2 that is hardly exposed to the excrement adhesion portion does not have a porous inner surface, but is non-porous and smooth. This non-porous and smooth area 2.8 of the inner surface of the bowl-shaped toilet body portion 2.2 is, for example, located at and above the height at which several small channel openings 2.9 of the flushing water distributor 2.10 that are arranged adjacent to each other are opened. Below this height, at Figure 1 and 2In the embodiment shown, the porous inner surface 2.4 of the bowl-shaped toilet body part 2.2 begins to extend downward into the visible area of ​​the trap 2.3. Therefore, the porous inner surface 2.4 of the bowl-shaped toilet body part 2.2 is formed above and below the water level W, which is defined by the maximum effective sealing water level that occurs during normal use of the toilet body 2 after the flushing process is completed.

[0065] The porous inner surface 2.4 of the bowl-shaped body portion 2.2 is hydraulically connected to the liquid-conducting wall portions 2.6 of the toilet body 2 located above and below the sealing water level W. The toilet device according to the present invention is designed, for example, in such a way that during a normal flushing process of the toilet body 2, after the device for supplying cleaning liquid to the porous inner surface 2.4 is turned off, the liquid in the liquid-conducting wall portion 2.6 located below the sealing water level W is flushed into the waste water pipe connected to the trap 2.3 in the same manner as the sealing water in the trap 2.3.

[0066] Another embodiment example of the toilet body according to the present invention is Figure 7 In Figure 7 In the example shown in FIG. 2 , the porous inner surface 2.4 of the bowl-shaped toilet body part 2.2 is formed only above the sealing water level W, which is defined by the maximum effective sealing water level that occurs during normal use of the toilet body 2 after the flushing process ends. The porous inner surface 2.4 of the bowl-shaped toilet body part 2.2 ends below the height at which several small channel openings 2.9 arranged adjacent to each other of the flushing water distributor 2.10 are opened. Below the sealing water level W of the trap 2.3, the inner surface of the toilet body 2 can be conventionally smooth, non-porous and visually dark, such as black or dark gray.

[0067] like Figure 7 The porous inner surface 2.4 of the bowl-shaped body part 2.2 shown is also hydraulically connected to a liquid-conducting wall part 2.6 of the toilet body 2 located above the sealing water level W. The toilet device according to the present invention is designed, for example, so that after the device for supplying cleaning liquid to the porous inner surface 2.4 is closed, the liquid located in the liquid-conducting wall part 2.6 is discharged from the liquid-conducting wall part 2.6 into the trap 2.3 or into a discharge pipe (preferably a waste water pipe) through an automatically opened valve (not shown).

[0068] Alternatively, the porous inner surface 2.4 of the toilet body part 2.2 is respectively hydraulically connected to the liquid-conducting wall part 2.6 of the toilet body 2. Figure 1 , Figure 2 and Figure 7 In the two embodiments shown, the toilet device according to the present invention can be designed so that after the device for supplying cleaning liquid to the porous inner surface 2.4 is closed, the liquid located in the liquid-conducting wall portion 2.6 is at least partially retained in the liquid-conducting wall portion 2.6 of the toilet body 2.

[0069] Figure 1 , Figure 2 and Figure 7 The two examples of toilet bodies 2 shown in FIG. 1 have in common that the flushing of the respective toilet bodies 2 is based on the positive displacement principle. Therefore, the toilet bodies 2 can also be referred to as volumetric ceramic appliances.

[0070] As described above, the cleaning agent may be added to the cleaning fluid supplied to the porous inner surface 2.4 of the toilet body 2. Figure 6 In the figure, the upper part of the hidden water tank 4 with the receiving part 28 for the cleaning agent 30 is shown in a vertical section. The water tank 4 is equipped with a mesh basket or a flexible insertion groove 28 for holding solid, soluble cleaning agents 30. Such sheet-like or stone-like cleaning agents 30 are also called toilet cleaning tablets. The flexible insertion groove 28 can be inserted into the water tank 4 via the inspection port 14 and can be removed for repair or maintenance purposes. The insertion groove 28 includes two body parts 28.1, 28.2, which are connected to each other by a flexible connection part 28.3 formed in the form of a thin hinge.

[0071] The embodiments of the invention are not limited to the embodiments shown in the drawings. On the contrary, many embodiment variants are conceivable, which also utilize the invention specified in claim 1 or one of the dependent claims, even if the design is different from the example shown. For example, within the scope of the invention, the device for supplying a cleaning fluid to the porous inner surface 2.4 of the toilet body has a container as a water reservoir, the container having an outlet valve or overflow device and a valve for filling the container with drinking water from the water connection or the second water connection, wherein the valve for filling the container has an outlet mouth, which in the operating position of the valve defines a free flow path relative to the water level present in the container. In addition to the water tank 4 described above and shown, such a (second) container can be part of the toilet device according to the invention. Such a (second) container can include a mesh basket or an insertion slot 28 for solid, soluble toilet cleaning tablets. In addition, the container can be provided with a heating device for heating the cleaning liquid. The heating device can be designed, for example, according to the principle of an instantaneous water heater or as a heating coil. This means that hot water can also be used to flush the porous wall of the toilet body. The heating device can be designed to permanently keep the container at a specific temperature above the ambient temperature.

[0072] According to another embodiment of the toilet device according to the invention, the device for supplying cleaning fluid to the porous inner surface 2.4 of the toilet body 2 has an additional water connection for direct connection to a hot water pipe or a cold water pipe, in particular to a hot water network or a cold water network, and an ejector 17.1 defining a free flow path 18 and an electrically controllable valve. In this embodiment, the ejector 17.1 is arranged in a liquid-tight flow-through housing 17.2, and the electrically controllable valve is preferably arranged between the additional water connection and the ejector 17.1.

Claims

1. A toilet device, comprising a toilet body (2) and a flushing water supply device for supplying flushing water to the toilet body, characterized in that: The flushing water supply device is provided with a water connection (15) for drinking water used as flushing water. The toilet body (2) has a bowl-shaped toilet body part (2.2) and a subsequent trap (2.3), the function of which is preferably based on sealing water. The bowl-shaped toilet main body (2.2) has a porous inner surface (2.4), The porous inner surface (2.4) is connected to a device for supplying a cleaning liquid to keep the porous inner surface (2.4) clean and / or to clean the porous inner surface (2.4), and The device for supplying cleaning liquid and / or the flushing water supply device is provided with at least one suck-back safety device (17), which prevents the cleaning liquid from being sucked back from the porous inner surface (2.4) to the water connection (15).

2. The toilet device according to claim 1, characterized in that: The flushing water supply device has a water tank (4), which is preferably a concealed water tank, a drain valve and a filling valve, wherein the filling valve is used to fill the water tank (4) with drinking water from the water connection (15), the filling valve having an outlet nozzle, which in the operating position of the filling valve defines a free flow path relative to the water level present in the water tank (4), and wherein the device for supplying cleaning liquid is connected to the water tank (4), wherein the water present in the water tank (4) is used as cleaning liquid to keep the porous inner surface (2.4) of the toilet body part (2.2) clean and / or to clean the porous inner surface.

3. The toilet device according to claim 1 or 2, characterized in that: The device for supplying cleaning fluid has a container as a water reservoir, which has a drain valve or overflow and a valve for filling the container with drinking water from the connection or a second water connection, the valve for filling the container having an outlet mouth which, in the operating position of the valve, defines a free flow path relative to the water level present in the container.

4. The toilet device according to claim 3, characterized in that: The device for supplying cleaning liquid, preferably the container, is provided with a heating device for heating the cleaning liquid.

5. The toilet device according to claim 1 or 2, characterized in that: The device for supplying a cleaning fluid comprises an additional water connection for direct connection to a hot water pipe or a cold water pipe, in particular to a hot water network or a cold water network, an ejector (17.1) being arranged in a liquid-tight flow housing (17.2), and an electrically controllable valve, wherein the ejector (17.1) is arranged in a liquid-tight flow housing (17.2), and wherein the electrically controllable valve is preferably arranged between the additional water connection and the ejector (17.1).

6. The toilet device according to any one of claims 1 to 4, characterized in that: The device for supplying cleaning liquid is provided with a pump (20) for conveying the cleaning liquid in the direction of the porous inner surface (2.4).

7. The toilet device according to any one of claims 1 to 6, characterized in that: The device for supplying cleaning liquid is provided with at least one sensor (26) and a controller (25), wherein the controller (25) triggers the supply of cleaning liquid according to at least one sensor signal from the sensor (26) or the plurality of sensors.

8. The toilet device according to claim 7, characterized in that: The sensor (26) or at least one of the sensors is arranged in or on a mounting element (6) supporting the toilet body (2), or in or on the toilet body (2).

9. The toilet device according to claim 7 or 8, characterized in that: The sensor (26) or at least one of the sensors is designed as a motion sensor, a weight sensor, a pressure sensor or a noise sensor.

10. The toilet device according to any one of claims 1 to 9, characterized in that: The function of the trap (2.3) is based on sealing water, and the porous inner surface (2.4) of the bowl-shaped body part (2.2) is formed only above a water level (W) defined by a maximum effective sealing water level set during normal use of the toilet body (2).

11. The toilet device according to any one of claims 1 to 9, characterized in that: The function of the trap (2.3) is based on sealing water, and the porous inner surface (2.4) of the bowl-shaped body part (2.2) is formed above and below a water level (W) defined by a maximum effective sealing water level set during normal use of the toilet body (2).

12. The toilet device according to claim 10 or 11, characterized in that: The porous inner surface (2.4) of the bowl-shaped main body part is connected to a liquid-conducting wall part (2.6) of the toilet body (2) located above the sealing water level (W), and the toilet device is designed in such a way that after the device for supplying cleaning liquid is closed, the liquid located in the liquid-conducting wall part (2.6) is at least partially retained in the liquid-conducting wall part (2.6) of the toilet body (2).

13. The toilet device according to any one of claims 1 to 10, characterized in that: The porous inner surface (2.4) of the bowl-shaped main body part (2.2) is hydraulically connected to the liquid-conducting wall part (2.6) of the toilet body (2) located above the sealing water level (W), and the toilet device is designed so that after the device for supplying cleaning liquid has been closed, the liquid in the liquid-conducting wall part (2.6) is discharged from the liquid-conducting wall part (2.6) into the trap (2.3) or into the drainage pipeline, preferably into the wastewater pipeline, through the automatic opening valve.

14. The toilet device according to claim 11, characterized in that: The porous inner surface (2.4) of the bowl-shaped main body part (2.2) is hydraulically connected to the liquid-conducting wall parts (2.6) of the toilet body located above and below the sealing water level (W), and the toilet device is designed in such a way that during the normal flushing process of the toilet body (2), after the device for supplying cleaning fluid is closed, the liquid in the liquid-conducting wall part (2.6) below the sealing water level (W) is flushed into the waste water pipe connected to the trap (2.3) in the same way as the sealing water in the trap (2.3).

15. The toilet device according to any one of claims 1 to 14, characterized in that: The toilet body (2) is designed so that its flushing is based on the volumetric principle.

16. The toilet device according to claim 12 or 13 in combination with any one of the preceding claims, characterized in that The liquid-conducting wall portion (2.6) of the toilet body (2) is connected to a suction device, so that the liquid in the liquid-conducting wall portion (2.6) located below and above the sealing water level (W) or the liquid located only below or only above the sealing water level (W) is sucked away by the suction device.

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